Serui battery

Lithium battery manufacturers ranking and China's top ten lithium battery companies-3

Tue, 25 Apr 2023 10:30:17 +0800

NO. 8 Micro-macro power

To fast-charge lithium titanate battery-based. At present, the total capacity is about 1.5 gwh, and the capacity of the second phase is 4 gwh. The main customers are Foton of BAIC, CSR Times, Land Ark, Nanjing Golden Dragon, King Long, Zhongtong bus, Chongqing Hengtong, etc. . In the first half of 2015, micro-macro power battery business output value of about 450 million yuan.

NO.9 SER GROUP LIMITED

Founded in 2002. It is a company that collects LiSOCL2 battery, lithium-manganese battery and polymer lithium-ion Battery Module Independent R & D, production and sales of state-level high-tech Enterprises, the company since its inception, after 15 years of development, it has become a leading provider of lithium-ion battery customization solutions and products in the world.

Lithium battery industry is still a growth industry, but also some domestic lithium battery manufacturers ranked in the middle of the enterprise income and asset growth. The top-ranked lithium battery manufacturers have performed well in terms of business performance, corporate governance and brand. There is more room for growth in the future, but the relative ranking of domestic lithium battery manufacturers is not stable, however, the opportunity for the latter to surpass the faster technological progress is open and equal.

Lithium battery manufacturers ranking and China's top ten lithium battery companies-2

Tue, 25 Apr 2023 10:28:14 +0800

No.5 Lishen

Founded: 1997 headquarters: Tianjin, Tianjin Lishen for China Electronic Technology Group subsidiary, Its Power Battery production base is located in Tianjin, and in Wuhan, Qingdao and other places to build a new power battery production base. Its power battery products cover lithium iron phosphate square and cylinder, ternary square and cylinder, etc. , major customers include Jianghuai, Geely, FAW, Dongfeng Motor, Nanjing Jinlong, King Long, Zhongtong bus, Tianjin Qingyuan, etc. . In the first half of 2015, its power battery business revenue was about 570 million yuan.

No.6 CNAC

Deep background, founding date: 2009 headquarters: Luoyang, Henan Province, CNAC lithium power production base is located in Luoyang, the total effective capacity of about 2Gwh, and currently in the Luoyang Industrial Park, Phase III project construction, planning capacity of 5Gwh, in addition, its proposed investment in Jiangsu 125 billion yuan for power cell production. At present, the main customers include Dongfeng Motor, Shaolin, Land Ark, Nanjing Jinlong, Sichuan Mustang, Zhongtong bus, Chongqing Ruichi and so on. In the first half of 2015, its power battery business revenue was about 400 million yuan.

No.7 Wina

Founded in 2006 headquarter: Shandong Weineng Environmental Power Co. , Ltd. was established in 2006, is a subsidiary of Shandong Weineng Environmental Power (Group) Co. , Ltd. . Shandong Weineng environmental group includes Shandong Weineng Environmental Power Supply Co. , Ltd. , Qingdao Weineng Electric Vehicle Electronic Control Co. , Ltd. , Qingdao diaphragm new Materials Co. , Ltd. , Beijing Wuhe Power Technology Co. , Ltd. , Kunshan Weineng Environmental Power Supply Co. , Ltd. . Micromacro-maverick headquarter, 2006 micromacro power systems, Huzhou, Huzhou was founded in 2006 as a subsidiary of vast, the production base is located in Huzhou, Zhejiang province.

Lithium battery manufacturers ranking and China's top ten lithium battery companies

Tue, 25 Apr 2023 10:12:06 +0800

Abstract：

Lithium battery industry is currently in a period of rapid growth, China's lithium battery companies ranking comprehensive strength analysis report, the comprehensive strength of the major domestic lithium battery manufacturers will be analyzed and evaluated, and the typical enterprises will be found, and the industry benchmark will be set to promote the healthy development of the industry.

The following ranking of domestic lithium battery manufacturers comparative analysis, mainly focusing on power storage lithium battery companies in the top ten.

No.1 Byd-vehicle + lithium-ion Battery,

Founded in 2006 BYD's power battery business is mainly distributed in Huizhou and Shenzhen base, the main products for lithium-ion battery iron phosphate. Current effective capacity of 4.5 gwh, including Huizhou 1 gwh, Shenzhen Kengzi 3.5 gwh, is expected by the end of 2015, the overall capacity will reach 6 gwh, 2016 will expand to 10 gwh. Jády's power cells are for BYD's own use only. In the first half of 2015, BYD's power battery business generated about 3 billion yuan in revenue.

NO.2 CATL

Headquartered in Ningde, Ningde with ATL, CATL has a production base in Qinghai province with a combined capacity of 1.4 gwh, major customers include BAIC, Brilliance BMW, Geely, FAW, CSR Times, King Long, Zhengzhou Yutong and Zhongtong Buses. In 2014, CATL's sales revenue of power batteries was about 860 million yuan, and in the first half of 2015, sales revenue of power batteries was about 950 million yuan.

No.3 Gotion High Tech

Founded in 2005 Headquarter: Hefei, Anhui, Hefei Guoxuan Power Energy Co. , Ltd. was established in 2005. Its main product is lithium iron phosphate power battery. Industry chain covers lithium iron phosphate cathode materials, cell production, BMS and PACK and other links. Guoxuan high-tech current effective capacity of 1.5 gwh, mainly for the square and cylindrical power battery cells. Guoxuan high-tech's main customers include Nanjing Jinlong, Jianghuai Automobile, Ankai bus, Zoomlion, Sunwin Bus, Dongfeng Automobile, Hebei Yujie and so on. In the first half of 2015, Guoxuan gaoco power battery revenue of about 750 million yuan.

No. 4: Wanxiang A123

Founded: 2011 Headquarter: Hangzhou, Zhejiang Wanxiang Power Battery Co. , Ltd. . Established in July 2011 with a registered capital of US $120 million, the sino-foreign joint venture is mainly engaged in the design, services and technology of lithium-ion battery and lithium-ion battery systems assembled from power batteries, upgrade. Wanxiang billion power patented technology from the U. S. Ener1 Company, using ENER1's automatic battery assembly technology.

What is beneficial about passivation of Li-SOCL2 Battery

Tue, 12 Apr 2022 23:29:41 +0800

What is beneficial about passivation of Li-SOCL2 Battery

The passivation of LiSOCl2 battery ensures an extremely low self-discharge rate during storage. thus, Lithium thionyl chloride batteries are very durable and have a very good shelf life. The self-discharge rate of only 1% per year speaks for itself.

The longevity of lithium thionyl chloride batteries ( LiSOCl2 battery )is due to the chemistry of the cell. Unlike other lithium primary cells, the lithium thionyl chloride ( LiSOCl2 battery) cell undergoes a chemical reaction between the lithium anode and the electrolyte. As a result, a protective film forms over the lithium anode, which impedes the ion flow between the anode and cathode. This is referred to as “passivation” of the battery cell.

This Lithium thionyl chloride battery passivation phenomenon has advantages and disadvantages. On the one hand, passivation is responsible for the low self-discharge rate of the Li-socl2 battery. On the other hand, the resulting protective film initially impedes the current flow when the Lisocl2 battery is put into operation. The protective film of the Lithium thionyl chloride battery passivation gradually fades away as the battery continues to operate. However, it forms again as soon as the battery stops drawing current. For this reason, lithium thionyl chloride batteries are particularly suitable for applications with low power consumption. The power requirement of the application can be constant or pulse-shaped.

We provides complete solutions for your battery system according to your requirements - standard cells and custom packs, from simple cells to intelligent battery packs for the most demanding applications.

LiSOCL2 battery (PCM/ PCB) Protection Circuit Board

Wed, 16 Mar 2022 16:58:16 +0800

LiSOCL2 battery (PCM) Protection Circuit Board

LiSOCL2 battery has many advantages, such as high voltage platform, high energy density (light weight and small size), long service life, and environmental protection. It is mainly composed of positive electrode material, negative electrode material, electrolyte, separator and shell.

Lithium-sulfur battery energy-type batteries have a relatively small discharge current, and the remaining energy after reaching the discharge cut-off voltage is small, and the safety hazard is minimal. However, power batteries are prone to safety hazards due to their large discharge current:

In the process of use, over-discharge and over-current will affect the service life and discharge performance of the battery, and in severe cases, it will cause the lithium battery to leak, burn and explode,Lisocl2 explosion.

LiSOCL2 battery short circuit has a high risk factor. Short circuit will cause the lithium sulfite battery to generate a large current instantly, and also generate a lot of heat, which will seriously damage the service life of the battery. The li socl2 3.6V battery burned and exploded,Lisocl2 explosion occur.

In addition, after reaching the cut-off voltage, the equipment protection system decisively terminates the circuit according to the set parameters. After a few seconds, the equipment protection system monitors the battery open circuit voltage of 3.6V, and will restore the discharge circuit again to discharge the battery to the outside Lisocl2 explosion

Especially li socl2 battery pack in series circuits, the phenomenon of unsynchronized discharge between batteries often occurs, and batteries that discharge too quickly are easily overdischarged.

LiSOCL2 battery protection circuit board is mainly composed of protection chip (or management chip), MOS tube, resistor, capacitor and PCB board, etc.

The protective functions of the LiSOCL2 battery protection circuit board:

1. Avoiding over-discharge of LiSOCL2 battery

Similar as rechargeable Lipo battery, when the lithium battery is over-discharged, the internal storage of the LiSOCL2 battery will undergo a qualitative change. At this time, the LiSOCL2 battery protection circuit board can sense this, so as to quickly cut off the discharge power supply, so that the lithium battery will not be fully discharged. This ensures the stability of the internal current of the LiSOCL2 battery and avoids the over-discharge of LiSOCL2 battery.

2. Avoid overcurrent and short circuit

When a large current is generated, the protection board will be turned off instantly, so that the battery is no longer energized and no heat is generated.

Once it detects that any battery voltage exceeds 4.2V or any battery voltage is lower than 3.0V, the system will automatically cut off the charging or discharging circuit. If the battery temperature exceeds the operating temperature of the battery or the current exceeds the discharge current of the battery, the system will automatically cut off the current path to ensure the safety of the battery and the system.

3. Energy balance.

Same as LiFePO4 batteries, for the entire series-parallel li socl2 battery pack, because many batteries are connected in series, after working for a certain period of time, due to the inconsistency of the cells themselves, the inconsistency of operating temperature, etc. Large differences have a huge impact on battery life and system usage, and the protection board also needs to monitor the voltage of each battery. Energy balance is to make up for the differences between individual cells to do some active or passive charging or discharging management to ensure the consistency of the battery and prolong the life of the battery.

Would you like to try the LiSOCL2 battery with PCM from us, contact: www.serui-battery.com

The COVID-19 drug VV116 is expected to be launched in 2022, stimulate the rise of lithium battery

Tue, 18 Jan 2022 14:13:29 +0800

The COVID-19 drug VV116 is expected to be launched in 2022, stimulate the rise of lithium battery sector

1. Future Prospects and Key Observations of Lithium Batteries

Throughout 2021, from the perspective of market reaction, the lithium battery-related industry chain sector does not seem to be affected by the Covid-19, but has been advancing all the way. Below, we will analyze the potential impact of the new coronavirus epidemic from the perspectives of industry supply and demand, as well as companies themselves.

1) Supply side effects:

The assembly of lithium battery materials and LiFePO4 batteries modules has a high degree of automation, so it is less affected by manpower; in addition, the cooperation between lithium batteries from materials to battery cells is extremely close, and more than 80% of the consumer battery industry is still concentrated in China.such as LiSOCL2 battery and LiMNO2 battery . In the case of consumer devices where all parts are indispensable, the high concentration of the lithium battery industry chain is still an advantage for the development of the industry.

In the field of lithium battery materials, the imports of lithium battery materials account for more than 30% of the world's lithium battery materials. Affected by the Covid-19, the delivery of export orders for precursors, positive and negative electrodes, separators, and electrolytes has been affected in a short period of time. From the perspective of domestic demand, the demand for Lipo battery for automotive power has increased significantly, while the demand in the fields of digital, power tools, and electric bicycles has not changed much. Therefore, the price increase of lithium battery materials will have a certain continuity.

2) Demand side impact:

According to the "Energy Conservation and New Energy Vehicle Development Plan", by 2021, the output of new energy vehicles in my country will reach 2 million, and the cumulative production and sales will exceed 5 million, while the domestic production of new energy vehicles in 2019 will be 1.242 million, and the cumulative sales will be 1.206 million. 10,000 vehicles, there is still room for 2.552 million vehicles from 5 million vehicles in 2020. Although state subsidies are declining year by year, the relay of the double-point policy has become a new driving force for the development of domestic new energy vehicles.

It is estimated that by 2021, the domestic demand for power batteries will reach 104GWh. Coupled with the promotion of 5G base stations, ultra thin battery energy storage batteries are the core guarantee for the continuous operation of communication base station facilities. When the mains grid supply fails or is abnormal, the energy storage battery can be switched without interruption to ensure that the equipment continues to work normally. In the future, the mature application of "communication base station + energy storage lithium battery", lithium iron phosphate battery will occupy a dominant position. With the acceleration of 5G infrastructure, the demand for energy storage lithium batteries will continue to rise, and more and more battery companies will join the market competition.

The three major measures will surely bring a new breath to the battery industry, will effectively promote the sound and rapid development of the new energy market, and become an important way to effectively respond to challenges and seize development opportunities.

3) The impact of the epidemic on lithium battery companies

Affected by the epidemic, lithium polymer battery companies are affected by the arrival of employees, upstream supply chain supply, and poor logistics. The production line resumption rate is generally less than 80%. The elimination of sulfur battery and lithium manganese battery companies will be more tragic, and capital will become the company's biggest crisis. The cash flow of the polymer battery and lithium iron phosphate battery industry itself is not good. Affected by the epidemic, it will increase the capital of many companies. turnover.

2. the Covid-9 drug VV116 is expected to be launched in 2022

Fortunately, on December 30, the new crown oral drug VV116 developed by a Chinese company was authorized for emergency use in Uzbekistan. This is another new crown oral drug approved in the world after Merck and Pfizer's new crown oral drugs were approved. At present, VV116 has entered the clinical trial stage in China.

According to CCTV news reports, preclinical pharmacodynamic studies have shown that VV116 has significant inhibitory activity on the original and variant strains of the new coronavirus, such as delta virus, in vitro. The research team of researcher Shen Jingshan from Shanghai Institute of Materia Medica, Chinese Academy of Sciences and cooperative scientific research institutions found that oral administration of VV116 can reduce the virus titer below the detection limit, and can significantly improve the pathological changes of lung tissue in experimental model animals. A series of preclinical safety evaluation experiments showed that VV116 has good safety and no genotoxicity. analysis from Safe Excellent Reliable Battery Manufacturer for LiSOCL2 battery_Ultra thin battery_3.0V lithium battery_Lipo battery_LiFePO4 batteries and Portable power station_SER GROUP

Summary: It is expected that with the gradual stabilization of the pneumonia epidemic, the supply of the lithium battery industry will gradually recover. In the medium and long term, the recovery of the lithium battery industry still needs to be considered from the demand side.

How to solve the safety problem of lithium battery

Sat, 15 Jan 2022 11:21:57 +0800

How to solve the safety problem of lithium battery

The safety of lithium batteries is a systematic project, which is related to these four key materials - the design of the positive electrode, the negative electrode, the electrolyte and the battery cell, the assembly process, and the battery management system.

After years of analysis and testing of lithium battery safety issues, the SER technical team believes that the safety of lithium batteries can be improved from the following three aspects: First, improve the thermal stability of lithium battery electrode materials and actively improve the safety of lithium batteries themselves performance; the second is to improve the electrolyte of lithium batteries and use safe electrolytes; the third is to optimize the design and management of lithium batteries through external means, such as adding PCM, PTC, etc., to monitor the charging and discharging process of lithium batteries in real time And timely handling of abnormal problems to ensure the safety of lithium battery use.

1. Improve the thermal stability of electrode materials

Generally speaking, the thermal stability of battery materials is the root of the safety of lithium-ion power batteries. Therefore, in order to fundamentally improve the safety of lithium batteries, it is also necessary to start from the thermal stability of the battery material itself.

Studies have shown that under high temperature conditions, the reaction between the cathode material and the electrolyte is one of the main causes of battery safety problems. Therefore, finding cathode materials with better thermal stability is an effective means to improve the safety of LiSOCL2 battery. It is important to find a cathode material with good thermal stability, but it cannot be ignored by modifying the cathode material to improve its thermal stability. Regarding the thermal stability of the negative electrode material, in addition to the thermal stability of the material itself, the thermal stability of the SEI film at the interface between the negative electrode and the electrolyte is more important.

Electrode material modification is an effective measure to improve the thermal stability of LiSOCL2 battery. Modified spinel lithium manganate, lithium nickel manganese cobalt oxygen ternary composite oxide and LiFePO4 batteries are the focus of current research on cathode materials. The commonly used modification methods are mainly surface coating and doping modification. Surface coating can reduce the reaction between the active material and the electrolyte, and at the same time reduce the oxygen released during the overcharge of the positive electrode material, stabilize the phase transition of the matrix material [7], and thus achieve the purpose of improving the thermal stability of lithium batteries. At present, there are many types of coating materials, such as: oxide-coated aluminum oxide (Al2O3), titanium dioxide (TiO2), phosphate (MPO4) coating [M=aluminum (Al), iron (Fe) , cobalt (Co)], aluminum hydroxide [Al(OH)3] coating, carbon coating and organic coating, although it cannot theoretically determine which type of coating material is most suitable for surface modification, but to a certain extent The thermal stability of the cathode material is improved. Cho et al. [8] found that coating LixCoO2 with nano-aluminum phosphate (AlPO4) particles can effectively suppress the exothermic reaction between the cathode material and the electrolyte.

2. Use safe lithium battery electrolyte.

The electrolyte plays the role of transporting lithium ions (Li+) between the positive and negative electrodes of the Lipo battery. The electrolyte participates in almost all the reactions that take place inside the battery, including not only the reaction between the electrolyte and the negative electrode material and the positive electrode material, but also the decomposition reaction of the electrolyte itself. It can be seen that the thermal stability of the electrolyte plays a crucial role in the safety of lithium batteries. Therefore, safe electrolyte systems have attracted attention and become a hot spot in the research and development of lithium polymer battery electrolytes.

For the electrolyte, its flammable organic solvent is the main element when the battery is burned. Therefore, it is necessary to develop an electrolyte that prevents combustion and has the function of preventing combustion. Adding additives to the conventional electrolyte is a common solution, generally using Phosphorus or halogen series materials.

3. By adding a protection board, the design and management of lithium batteries are optimized, etc.

The lithium battery protection board is the charge and discharge protection for the series-parallel lithium thionyl chloride battery pack; when fully charged, it can ensure that the voltage difference between the individual cells is less than the set value (generally ±20mV), so that each cell of the battery pack can be realized. The equal charging of the battery effectively improves the charging effect in the series charging mode; at the same time, it detects the overvoltage, undervoltage, overcurrent, short circuit and overtemperature status of each single cell in the battery pack to protect and prolong the battery life; The voltage protection prevents each single cell from being damaged due to over-discharge when it is discharged. In practical applications, PTC often appears as a thermistor, and the lithium battery protection board is through the large resistance value of the device material, so as to become a circuit breaker in disguise, cutting off the current to achieve the function of protection, such an explanation, everyone It is easy to think that PTC is a very important component in the LiFePO4 battery protection board, and the main protection function is also realized through it.

The voltage increase and decrease of lithium battery and the methods

Tue, 11 Jan 2022 14:39:09 +0800

1. Test of voltage increase and decrease of lithium battery

First, let the lithium battery reduce to 3.3V by reducing the voltage chip, then provide power to the microcontroller and the Bluetooth module, and plan to increase it to 7V to drive a load.

Result: The bluetooth module does not work and cannot be searched. Remove the bluetooth, the microcontroller and the load are working normally. When the MCU is removed, the bluetooth and the load work normally. Without reducing the voltage, when a group of power supplies is used alone, all three work normally.

Description: xc6206 for lowering the voltage and fd6291 for increasing the voltage.

2. The problem of increasing the voltage and reducing the voltage of lithium batteries

Let's analyze the reasons for the above problems, find out the common faults of lithium battery voltage increase and decrease voltage, and learn together.

Lithium-ion batteries have a certain range of single voltage. For example, the normal operating voltage range of lithium iron phosphate batteries is 2.5V-3.65V, and the normal operating voltage range of lithium manganate and ternary batteries is 3V-4.2V.

In the application of lithium-ion battery, when the total voltage is 60V and below, a battery protection board is required. Above 60V, a battery management system (BMS) is required. The role of these two devices is to protect the battery from working properly.

Note that after the number of battery packs in series is determined, the battery pack voltage cannot be adjusted arbitrarily. That is, the voltage change of the battery pack can only change within the normal operating voltage range: when charging, it rises from the lower voltage limit to the upper voltage limit. When using electricity, it will drop from the upper voltage limit to the lower voltage limit.

Understand this problem, if you want the lithium battery to increase and decrease the voltage range is very large, you can adjust it at will.

The best solution: make a set of battery packs, match with a suitable inverter, and then match with a DC voltage regulator, which can meet the requirements of increasing and decreasing the voltage of lithium batteries.

Note: This method is rarely used in practical applications, and this method of increasing and decreasing the voltage will only be considered when the AC power used is frequently out of power, or when the battery pack is charged by solar energy or wind.

The boosting and buckling methods of the above lithium battery can be used in the test, and the effect of research and study is good.

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Tue, 11 Jan 2022 10:29:39 +0800

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