These brands of electric vehicle batteries are good: Tianneng, Chaowei, Haibao, Shengyang, and Xinxuneng.

1. Tianneng

Tianneng Power is China’s largest power battery manufacturer, mainly engaged in lead-acid, nickel-metal hydride and lithium-ion power batteries, electronic appliances for electric vehicles and R&D, manufacturing and sales of wind and solar energy storage batteries. Tianneng Power has been rated as one of the top 10 most profitable enterprises in the country, one of the top 500 private enterprises in the country, an advanced collective in the national light industry, an advanced unit in after-sales service for famous and high-quality products in the country, one of the top 100 manufacturing enterprises in Zhejiang Province, and one of Forbes' 2008 China's Top 10 Potential Companies. Strong enterprise.

2. Chaowei

Chaowei Power Supply Co., Ltd. was founded in 1998. It is a national key high-tech enterprise, a national product quality inspection-free enterprise, a key industrial enterprise in Huzhou City, and a municipal manufacturing industry. It is a leading enterprise, an enterprise with advantages and characteristics of the city, an executive director of the National Battery Industry Association, a member of the National Electrical Equipment Industry Association, a vice-president unit of the Provincial Battery Industry Association, and a member of Forbes' 2005 "China's Potential 100" list, ranking third consecutively from 2005 to 2007. "Top 100 China's Growth Enterprises."

3. Haibao

Haibao brand lead-acid battery products for electric vehicles and bicycles have large capacity, high specific energy, good low-temperature performance, and deep discharge It has the advantages of strong recovery performance and long cycle life. Its performance indicators are among the best among similar products in the world, and it is designated and selected by many well-known domestic electric vehicle supporting manufacturers.

4. Shengyang

Shandong Shengyang Power Supply Co., Ltd. is a national high-tech enterprise founded in January 1991 and listed on the Shenzhen Stock Exchange Small and Medium Enterprises Board on May 6, 2014. It is one of the earliest companies in China to develop and manufacture valve-regulated sealed lead-acid batteries. 1. It is the first company in China's lead-acid battery industry to pass the export inspection exemption review.

5. Xinxuneng Power Supply was established in 2003 and has been selected (named). ) is a national inspection-free product, a well-known trademark in China, the winning brand of national home appliances going to the countryside, the most popular battery brand among consumers across the country, and the executive director unit of China Low Carbon Industry Alliance. It owns Changxing Tiandu Power Supply, Jiangsu Jin Changxing Power Supply, and Xinyi Shenghua Power Supply. , Jiangsu Jinjie Electronics and other subsidiaries (branch), realizing a complete industrial chain of battery assembly, plate production and pulse rechargeable battery manufacturing. It produces 70,000 electric vehicle batteries per day. In 2014, its subsidiary Jiangsu Jinchangxing Power Supply was among the first in the country to pass the Ministry of Environmental Protection. Acceptance.

Extended information:

1. Deep discharge

Lead-acid batteries used in cars only discharge in one direction during ignition. After ignition, the generator will The battery is automatically charged and does not cause deep discharge of the battery. However, it is impossible to charge the battery while riding. When the battery is deeply discharged, the concentration of lead sulfate increases and the sulfation becomes quite serious.

The cruising current of electric vehicles at 20 kilometers is generally 4A. This value is already higher than the operating current of batteries in other fields, and the operating current of batteries of overspeeding and overloaded electric vehicles is even greater. Manufacturers have conducted cycle life tests of 70% charging at 1C and 60% discharge at 2C. After such life tests, many batteries can achieve a lifespan of 350 charge and discharge cycles, but the actual results are far different. Because high-current operation increases the depth of discharge by 50%, the battery will accelerate vulcanization.

4. Short-term charging

Since electric bicycles are vehicles, they do not have much time to charge. To complete 20 Amp charging of 36 volts or 48 volts within 8 hours, the charging voltage must be increased (generally 2.7~2.9 volts per cell). When the charging voltage exceeds the oxygen evolution voltage of a single cell (2.35 volts) or When the hydrogen evolution voltage is 2.42 volts, the battery will open the valve to exhaust due to excessive oxygen evolution, causing water loss, increasing the electrolyte concentration, and aggravating the sulfurization phenomenon of the battery.

5. Cannot be charged in time after discharge

As a means of transportation, the charging and discharging of electric bicycles are completely separated. It is difficult to charge in time after discharge, and the formation of electric bicycles after discharge If a large amount of lead sulfate is not recharged for more than half an hour and is reduced to lead oxide, it will sulfide and form crystals.

6. Correctly grasp the charging time

During use, the charging time should be accurately grasped according to the actual situation. Refer to the usual frequency of use and mileage, and also pay attention to the capacity instructions provided by the battery manufacturer.

And the performance of the supporting charger, the size of the charging current and other parameters to control the charging frequency. Generally, batteries are charged at night, and the average charging time is about 8 hours. If it is shallowly discharged (the mileage after charging is very short), the battery will be fully charged soon, and overcharging will occur if it continues to charge, causing the battery to lose water, generate heat, and reduce battery life.

7. Prevent exposure

Electric vehicles are strictly prohibited from being exposed to the sun. An environment where the temperature is too high will increase the internal pressure of the battery and force the battery pressure limiting valve to open automatically. The direct consequence is to increase the amount of water loss in the battery. Excessive water loss in the battery will inevitably lead to a decrease in battery activity, accelerate the softening of the plates, and damage the shell during charging. The body heats up and the shell bulges, deforms and other fatal damage.