Huizhou Jstary New Energy Co., Ltd. company cases

Challenges in Battery Safety Assurance Difficulties: During the manufacturing process of lithium batteries, issues such as internal short circuits, overcharging, over-discharging, and thermal runaway can easily lead to combustion and even explosions, posing a serious threat to user safety. For example, during the battery assembly process, foreign objects like metal debris getting mixed into the battery can pierce the separator, causing the positive and negative electrodes to come into direct contact and triggering a short circuit. In the process of injecting the electrolyte, inaccurate injection volume can affect the electrochemical performance of the battery and increase the risk of thermal runaway. Solving Process: Strengthen safety assurance measures from multiple aspects. In terms of the production environment, establish a dust-free and dry production workshop, and control the temperature, humidity, and cleanliness inside the workshop to reduce the possibility of foreign objects entering. In terms of process control, add online detection equipment, such as X-ray detection equipment, to conduct non-destructive testing on the internal structure of the battery, and promptly detect problems such as foreign objects and short circuits. In the electrolyte injection process, use high-precision metering pumps and liquid level detection systems to accurately control the injection volume of the electrolyte. In terms of battery design, optimize the structural design of the battery and adopt safety devices such as safety valves and explosion-proof valves. When the internal pressure and temperature of the battery are too high, the pressure can be automatically released to prevent the battery from exploding. In addition, develop advanced Battery Management Systems (BMS) to monitor parameters such as the battery's voltage, current, and temperature in real-time. Once abnormalities are detected, immediate protective measures, such as cutting off the charge and discharge circuit, can be taken to avoid safety accidents.

Challenges in Battery Consistency and Grouping Technology Difficulty: Lithium batteries for golf carts are usually composed of multiple cells connected in series or parallel to form a battery pack. Differences in parameters such as the capacity, voltage, and internal resistance among the cells will lead to a decline in the performance of the battery pack during use and shorten its service life. For example, during the charging and discharging process, cells with smaller capacities will reach the fully charged or fully discharged state first, thereby affecting the charging and discharging efficiency and cycle life of the entire battery pack. Solution Process: Firstly, in the cell production process, strengthen the sorting and grouping process. Use high-precision sorting equipment to accurately measure and screen parameters such as the capacity, voltage, and internal resistance of the cells, and form battery packs with cells having similar parameters. Secondly, optimize the design and manufacturing process of the battery pack, reasonably arrange the connection mode of the cells, and adopt technologies such as equalization circuits to achieve balanced charging and discharging of each cell within the battery pack. During the assembly process of the battery pack, strictly control the welding process to ensure a firm and reliable connection between the cells, reduce the contact resistance, and minimize energy loss. At the same time, before the battery pack leaves the factory, conduct strict testing and aging tests, simulate the actual operating conditions, comprehensively detect and evaluate the performance of the battery pack, and ensure the consistency and reliability of the battery pack.

Frequent Charging Failures Difficulty: During use, lithium batteries may experience abnormal charging situations, such as inability to charge, slow charging, and severe heating during charging. The causes of these problems are quite complex. It may be due to loose charging interfaces, damaged charging cables, faulty chargers, malfunctions in the Battery Management System (BMS), or damage to the internal cells of the battery. For example, after long-term use, the charging interface may have poor contact due to oxidation, wear, etc., resulting in the inability to charge or unstable charging. Unstable output voltage or current of the charger can affect the charging speed and cause the battery to heat up. Solution Process: Regarding issues with the charging interface and cable, regularly inspect the charging interface and cable. If the interface is loose, tighten it in a timely manner. If the outer skin of the charging cable is damaged or the internal wires are broken, replace it with a new one. For charger failures, use tools such as a multimeter to detect the output voltage and current of the charger. If they do not meet the standards, repair or replace the charger. When suspecting a malfunction in the battery management system, use professional diagnostic equipment to read the fault codes of the BMS, analyze the cause of the fault, and repair or replace the damaged BMS module. If the internal cells of the battery are damaged, send the battery to a professional maintenance agency. Use professional equipment to detect the damaged cells and replace them. At the same time, establish a complete maintenance system for charging equipment. Regularly clean and maintain the charger, charging interface, etc. to ensure the normal operation of the charging equipment.

Problem of Reduced Driving Range Difficulty: As the usage time increases, the driving range of the lithium battery gradually decreases, making it difficult to meet the daily operation requirements of the golf cart. This is mainly because the active substances inside the battery gradually wear out, and the structure of the electrode materials changes, leading to a reduction in battery capacity. In addition, frequent deep charging and discharging, as well as use in high or low temperature environments, will accelerate the degradation of battery performance. For example, in the hot summer, when the temperature on the golf course is too high, the chemical reaction speed of the lithium battery accelerates, the internal impedance increases, and the driving range is significantly shortened. In the cold winter, the fluidity of the electrolyte deteriorates, the ion diffusion speed slows down, and the available capacity of the battery drops substantially. Solution Process: Firstly, optimize the usage habits and avoid excessive discharging and prolonged overcharging. It is recommended to charge the battery when the remaining power is around 20% - 30%, and unplug the charger in a timely manner after it is fully charged to prevent damage to the battery caused by overcharging. Secondly, improve the usage environment of the battery. Equip the golf cart with a sunshade to avoid exposing the battery to direct sunlight in high temperatures. In cold weather, try to park the cart indoors or in a place with a relatively high temperature, or install a thermal insulation device for the battery. At the same time, conduct deep charging and discharging maintenance on the battery regularly. Perform a complete charge and discharge 1 - 2 times a month to activate the active substances inside the battery and restore part of the battery capacity. In addition, battery repair technology can be adopted. Utilize professional battery repair equipment, and through specific charging and discharging procedures and pulse repair technology, repair the battery, improve its charging and discharging performance, and extend the battery's service life.