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Battery BMS Board

Lithium Battery BMS

Lifepo4 Battery BMS

Active Balancer BMS

Smart Active Balancer

Active Equalizer

5A Active Balancer

1A Active Balancer

Diode Module

Battery Repair Machine

Battery Accessories

High Current BMS

Energy Storage BMS

Different Application BMS

RV Energy Storage BMS

Home Storage BMS

EV Storage BMS

Truck Start BMS

Golf Carts BMS

Electric Tricycle BMS

Electric Vehicle BMS

Electric Forklift BMS

Electric Scooter BMS

Charging Station BMS

Heavy-duty Vehicle Smart Active Balancer BMS
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About Us
China Shenzhen Juyi Science And Trade Co., Ltd.
Shenzhen Juyi Science And Trade Co., Ltd.
Shenzhen Juyi Science And Trade Co., Ltd. is a new energy enterprise engaged in the research and development of lithium battery protection panels
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Latest company news about High Current BMS for Car and Electric Vehicle Start
2026-10-31

High Current BMS for Car and Electric Vehicle Start

A protection board for an automotive starter battery acts as a "safety guardian" within an emergency jump-starter power supply. Its primary role is to prevent overcharging, over-discharging, short-circuiting, and reverse-polarity connections, ensuring the safety of both the device and the vehicle during high-current engine cranking. If you are purchasing a protection board separately—whether for assembly or repair—it is crucial to verify that the number of series-connected cells, current specifications, and battery type are all compatible.   What is an Automotive Starter Protection Board? As the name suggests, an automotive starter protection board is a safety device installed within a vehicle’s starting system. Typically located near the starter motor or the battery, it is designed to prevent damage to the vehicle’s electrical circuits and critical components caused by the sudden current surge that occurs during engine cranking. When starting the engine, a massive amount of current is required to drive the starter motor; this process can trigger transient voltage fluctuations or current overloads—issues that the protection board is specifically engineered to address.     Core Functions of a Starter Protection Board 1. Preventing Current Overload At the moment of ignition, the starter motor demands a high surge of current to crank the engine. Without a protection board, this intense current could overwhelm the vehicle’s electrical system, potentially blowing fuses or damaging electrical components. By monitoring current flow, the protection board can automatically cut the circuit during an overload, preventing further damage to the vehicle. 2. Stabilizing Voltage Fluctuations During the cranking process, the battery voltage may experience a brief drop. Such fluctuations can not only interfere with the proper operation of the starter motor but also negatively affect the vehicle’s electronic systems (such as the ECU or audio system). The protection board effectively stabilizes the voltage, ensuring the electrical system remains stable throughout the starting process. 3. Extending Battery Lifespan The high current demand during engine starting can take a toll on a battery’s longevity. By providing protection, the board alleviates the strain placed on the battery during ignition, thereby extending its service life and reducing the frequency of replacements and the need for repairs. 4. Temperature Protection and Cell Balancing Advanced protection boards may also monitor temperature—triggering a heating function in cold conditions—or utilize cell-balancing features to ensure that the voltage across individual battery cells remains uniform, further extending the battery's overall lifespan.   Applicable Scenarios for Starting Protection Boards 1. Older Vehicles For vehicles that have been in use for a long time, the performance of the electrical system and the battery may have degraded. A starting protection board can help prevent malfunctions caused by aging circuitry during the vehicle-starting process. 2. Driving Conditions Involving Frequent Starts In scenarios where a vehicle is started frequently—such as during short-distance urban commuting—a starting protection board can effectively mitigate the repetitive stress placed on the electrical system during each start, thereby reducing the failure rate. 3. High-Performance Modified Vehicles Some high-performance modified vehicles may have increased current demands during startup. A starting protection board provides additional protection for these vehicles, ensuring that the modified electrical system operates stably.     Selecting and Installing a Starting Protection Board 1. Choosing the Right Protection Board for Your Vehicle Check the battery type and the number of cells in series: Common options are designed for ternary lithium or lithium iron phosphate (LiFePO4) batteries. Ensure the number of cells in series matches your battery pack (e.g., 4S, 8S, 10S, etc.); an incorrect match will result in the board failing to function or failing to provide protection. Consider continuous and peak current ratings: For small passenger cars with lower starting current requirements, a protection board with a continuous current rating of around 100A and a peak current rating of 1000A is generally suitable. For larger vehicles or diesel-powered vehicles, which require higher current, opt for models with a continuous current rating of 150A–200A and a peak current rating of 1500A–2000A. Verify that the protection features are comprehensive: The board should at least include protection against overcharging, over-discharging, overcurrent, short circuits, and reverse polarity. Ideally, it should also feature temperature monitoring and a waterproof design.   2. Installation Considerations The installation of a starting protection board should generally be performed by a professional to ensure it is correctly integrated into the vehicle's electrical system. Improper installation can prevent the board from functioning correctly and may even lead to new issues.   Maintenance and Inspection of Starting Protection Boards Although starting protection boards typically have a long service life, regular checks of their operational status remain essential. Vehicle owners can assess whether the board is functioning properly by observing the vehicle's startup performance or by using professional diagnostic tools. If any irregularities occur during startup—such as difficulty starting the engine or significant voltage fluctuations—the system should be inspected and serviced promptly. Although the vehicle starting protection board may seem like an inconspicuous little component, it plays a vital role in a vehicle's safety and reliability. From preventing current overloads and stabilizing voltage fluctuations to extending battery life, this protection board provides an extra layer of security for your vehicle every time you start the engine. For any car owner who prioritizes vehicle maintenance, equipping their vehicle with a suitable starting protection board is not just a way to care for their car—it is also an essential safeguard for driving safety.     Advantage of Enerkey bms for Automotive/Electric Vehicle Starting 1. It can be used for All full lithium battery type, Included Ternary lithium, lithium iron phosphate, lithium titanate, sodium-ion 2. Support battery strings for 3s to 10s. 3. Continuous operating current has 40A, 80A, 120A, 200A Option. 4. Peak starting current has 80A,120A, 160A, 200A, 300A, 450A, 600A Option. 5. Individual cell voltage measurement resolution: 1Mv 6. It has temperature protection and balancing functions, effectively extending battery lifespan. 7. Includes Low-Voltage Switch, It can save more power. 8. Double-sided power MOSFET mounting with a heat-dissipating enclosure, Can be used for high temperature environment. 9. High quality materials for Automotive-grade MOSFETs and Thick-copper PCB 10. Current shunting via thickened copper strips, Low consumption11. Professional develop team, Support customized size and parameters and communication port and others as your requirement.  
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Latest company news about Enerkey New Design of an active bidirectional DC-DC battery intelligent equalizer
2025-12-18

Enerkey New Design of an active bidirectional DC-DC battery intelligent equalizer

Environmental pollution and energy crises are gradually becoming two major challenges of the 21st century. With increasing environmental awareness and strong government support, electric vehicles, with their energy-saving and environmentally friendly characteristics, have gained market favor and will undoubtedly lead the future development of the automotive industry. Batteries, as the core component of electric vehicles, determine the possibility of further development. Due to technological limitations, the power battery of an electric vehicle is composed of multiple single cells connected in series. The inconsistency of individual cell performance and severe overcharging and over-discharging during use significantly affect the battery pack's lifespan.   Therefore, battery balancing technology is crucial for the industrial development of electric vehicles. Applying battery balancing technology to charging stations to ensure the safe and effective charging of the battery pack each time is one way to solve the problem of battery pack lifespan degradation. The latest domestic and international data show that non-dissipative balancing technology is currently the focus of research, exhibiting a diversified circuit structure and a variety of control methods. However, many balancing methods remain at the theoretical research stage and do not fully consider parameter changes in the actual working environment of the battery pack. Furthermore, some proposed balancing control strategies are often too complex to be applied in practice.     Based on an in-depth analysis of domestic and international research on power battery pack balancing technology, Enerkey BMS has developed an active bidirectional DC-DC battery equalizer design method specifically for the incomplete charging and overcharging situations that often occur during electric vehicle charging. This method can achieve complete charging of lithium battery packs and can balance the charging of a battery pack composed of 24 lithium cells. The designed battery balancing system consists of two parts: the balancing main circuit and the balancing controller. First, the circuit design of the balancing main circuit and controller is described in detail. With the goal of designing a product-level battery equalizer, the circuit design methods for the power supply circuit, power monitoring circuit, DSP peripheral circuit, SPI module, and CAN module are discussed. The balancing controller uses a DSP as the control core, supplemented by Linear Technology's LTC6804-2 voltage acquisition module. Secondly, a complete solution from battery voltage monitoring to individual cell voltage balancing of the battery pack is designed, along with an effective balancing strategy. SOC estimation algorithm; subsequently, a simulation model of the battery balancing system was established, and the balancing scheme was verified through simulation. Finally, a prototype of the battery balancer was developed and subjected to electromagnetic compatibility, high and low-temperature tests, and functional tests to verify the effectiveness and reliability of the entire system design.   For the balancing problem of series-connected lithium-ion batteries, we proposed an intelligent battery balancing scheme based on fuzzy logic control. This battery balancing scheme consists of a bidirectional DC-DC controller with an energy transfer capacitor, which can be used to design a lossless equalizer in the energy balancing system. Simulation and experimental results show good balancing performance of the lithium-ion battery pack. The fuzzy logic balancing control strategy can reduce the balancing time by 32%.     This belongs to the field of balancing technology in battery management systems, involving a high-current power battery bidirectional equalizer, including a bidirectional DC-DC converter, a relay network, and a battery management system. The battery management system monitors the battery voltage and temperature in real time and transmits the obtained temperature and voltage data to the connected microcontroller system; the microcontroller determines the single battery that needs balancing based on the voltage of the individual battery; the microcontroller system selects the relays at both ends of the single battery to be balanced, controls the input and output direction of the set bidirectional DC-DC converter, and activates the relay network to achieve balancing; the relays are respectively set at both ends of each single battery in the battery pack.     Enerkey BMS's newly launched bidirectional DC-DC intelligent equalizer is a high-current power battery bidirectional balancing method and equalizer, achieving lossless balancing of high-current power batteries; it can also meet the requirements of fast charging applications.
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