EV Traction Battery Pack
Integrated Liquid Cooling
The traction battery pack uses an integrated liquid-cooling structure to manage cell temperature and improve thermal uniformity. The cooling system is incorporated into the battery enclosure to optimize both thermal performance and structural packaging.
Lightweight & Integrated Structure
The battery enclosure combines aluminum structural profiles with the cooling system to reduce redundant components and improve pack-level integration. The design supports lightweight construction while maintaining the structural requirements of commercial EV applications.
Intelligent Battery Management
The BMS provides cell-level monitoring, balancing, fault diagnostics, state estimation, and high-voltage protection. Its distributed architecture supports accurate battery monitoring and rapid response to abnormal operating conditions.
Traction Battery Pack - Key Technical Features
01. Integrated Liquid Cooling
02. Integrated Structural Design
03. Lightweight & High-Density
04. BMS & Battery Monitoring
05. Battery Safety
06. Automated Manufacturing
Traction Battery Pack - Technical Specifications
01
Battery Cell
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Item
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Specifications
|
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|---|---|---|---|
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Model
|
|
||
|
206 Ah
|
228 Ah
|
304 Ah
|
|
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Dimension
|
53.8*174.2*207.1 mm
|
53.8*174.2*207.1 mm
|
71.8*173.9*207.3 mm
|
|
Weight
|
≤4.2 kg
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≤4.3 kg
|
≤5.36 kg
|
|
Capacity
|
206 Ah
|
228 Ah
|
304 Ah
|
|
Energy
|
659 Wh
|
734 Wh
|
978 Wh
|
|
SoC Window
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0% ~ 100%
|
||
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Upper Voltage Limit
|
3.65 V
|
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Nominal Voltage
|
3.22 V
|
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Lower Voltage Limit
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2.5 V
|
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Gravimetric Energy Density
|
160 Wh/kg
|
175 Wh/kg
|
175 Wh/kg
|
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Cycle Life
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≥3000cycle，1C/1C，100% DOD，25℃，80%SOH
|
||
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Continuous Charge/Discharge Rate
|
1C
|
||
02
Battery Pack - C Box
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Item
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Specifications
|
||
|---|---|---|---|
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Cell Model
|
|
||
|
206 Ah
|
228 Ah
|
304 Ah
|
|
|
Nominal Voltage
|
153.6 V
|
154.56 V
|
115.92 V
|
|
Energy
|
31.641 kWh
|
35.239 kWh
|
35.239 kWh
|
|
Weight
|
226±3% kg
|
233±3% kg
|
230±3% kg
|
|
Energy Density
|
≥140 Wh/kg
|
≥150 Wh/kg
|
≥155 Wh/kg
|
|
Configuration
|
1P48S
|
1P48S
|
1P36S
|
|
Continuous Charge/Discharge Rate
|
1C
|
||
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Peak Discharge C-Rate
|
2C/30S
|
||
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Thermal Management
|
Liquid Cooling / Electric Heating
|
||
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Protection Level
|
IP68
|
||
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Envelope Dimensions
|
(1060±10)*(630±10)*(240±5) mm
|
||
03
Battery Pack - G Box
|
Item
|
Specifications
|
||
|---|---|---|---|
|
Cell Model
|
|
||
|
206 Ah
|
228 Ah
|
304 Ah
|
|
|
Nominal Voltage
|
124.8 V
|
125.58 V
|
96.6 V
|
|
Energy
|
25.708 kWh
|
28.632 kWh
|
29.366 kWh
|
|
Weight
|
185±3% kg
|
191±3% kg
|
189±3% kg
|
|
Energy Density
|
≥140 Wh/kg
|
≥150 Wh/kg
|
≥155 Wh/kg
|
|
Configuration
|
1P39S
|
1P39S
|
1P30S
|
|
Continuous Charge/Discharge Rate
|
1C
|
||
|
Peak Discharge C-Rate
|
2C/30S
|
||
|
Thermal Management
|
Liquid Cooling / Electric Heating
|
||
|
Protection Level
|
IP68
|
||
|
Envelope Dimensions
|
(950±10)*(630±10)*(240±5) mm
|
||
Traction Battery Pack - BMS Design & Architecture
The battery management system (BMS) for our traction battery pack is based on a 1-master, 2-slave hardware architecture, with more than 99% automotive-grade components and an ultra-low master-controller quiescent current of approximately 50 μA at 12 V. The hardware platform is designed with ASIL D capability, while the system functions are designed to support ASIL C requirements. The development process also supports Automotive SPICE (ASPICE) Level 2 practices, with a modular architecture that provides flexibility for different battery configurations.
Master Control Unit
- ASIL C functional safety design for enhanced system-level reliability.
- High-coverage hardware diagnostics for open-circuit, short-circuit, and short-to-power faults, helping prevent unintended high-voltage interruption caused by MCU abnormalities or unexpected resets.
- Three-state fault diagnostics for more accurate fault identification and troubleshooting.
- Optimized software compression technology enables faster program flashing, with a typical programming time of approximately 90 seconds.
- More than 99% automotive-grade components are used to support long-term reliability.
- A three-layer software safety monitoring architecture provides multiple levels of supervision for improved system safety and fault handling.
Slave Control Unit​
- Cell voltage measurement accuracy of up to ±1.5 mV across the full operating temperature range.
- All measurement channels support -5 V negative-voltage input, improving robustness under abnormal cell or wiring conditions.
- Balancing current of up to 140 mA at 4.2 V.
- Supports diagnostics for cell open-circuit, short-circuit, and short-to-power faults.
- Modular and scalable architecture supporting up to 140 cell-voltage monitoring channels.
- Supports balancing during sleep and standby periods, enabling continuous balancing management when the vehicle is not operating.
Traction Battery Pack Safety Testing & Validation
Our traction battery pack safety is validated through a comprehensive range of mechanical, environmental, electrical, and thermal safety tests. PACK-level testing is conducted in accordance with applicable requirements of GB 38031-2020, covering vibration, mechanical shock, simulated collision, crushing, immersion, external fire, thermal propagation, temperature shock, salt spray, and electrical protection conditions.
The validation program evaluates key safety indicators including enclosure integrity, leakage, insulation resistance, abnormal termination conditions, and thermal runaway response. For thermal propagation testing, the system is required to provide a thermal event warning signal at least 5 minutes before thermal runaway, with PACK-level thermal runaway performance meeting the specified no-fire and no-explosion criteria.
Testing & Validation Scope
- Vibration Test
- Mechanical Shock Test
- Simulated Collision Test
- Crush Test
- Damp Heat Cycling Test
- Immersion Test
- External Fire Test
- Thermal Propagation Test
- Thermal Shock Test
- Salt Spray Test
- High-Altitude Test
- Overtemperature Protection Test
- Overcurrent Protection Test
- External Short-Circuit Protection Test
- Overcharge Protection Test
- Overdischarge Protection Test
- High-Voltage Component Protection Rating
- Thermal Runaway Test
- Manual Service Disconnect & Fuse
- Pressure Relief Valve
- Thermal Event Warning
Engineering Support for EV System Integration
We support customers throughout the EV development process, from electric powertrain selection to vehicle integration. With proven commercial vehicle electrification experience, our engineering team provides system recommendations, integration support, and technical documentation to accelerate the development of reliable electric drive solutions.
Application Assessment
- Vehicle requirement analysis
- Powertrain configuration guidance
- Application compatibility review
Integration Support
- Mechanical interface and packaging support
- Electrical interface Support
- Engineering Coordination
Frequently Asked Questions
Our traction battery packs are designed for commercial electric vehicle applications, including buses, trucks, logistics vehicles, and other electric commercial vehicle platforms. Battery configurations can be matched to different vehicle requirements and operating conditions.
Yes. Battery voltage, energy capacity, series/parallel configuration, and other key parameters can be configured according to the vehicle platform and application requirements. Customized configurations should be evaluated based on the specific project specifications.
The BMS uses a 1-master, 2-slave architecture with a modular hardware platform. The system supports high-accuracy cell voltage monitoring, cell balancing, fault diagnostics, and multiple electrical protection functions, with a scalable architecture supporting different battery configurations.
The BMS supports monitoring and protection functions including overtemperature, overcurrent, overvoltage, undervoltage, external short circuit, overcharge, overdischarge, and cell-level fault diagnostics. The system also incorporates pre-charge, active discharge, and multi-level safety monitoring functions.
PACK-level safety validation covers mechanical, environmental, electrical, and thermal conditions. Testing includes vibration, mechanical shock, simulated collision, crush, immersion, external fire, thermal propagation, temperature shock, salt spray, high-altitude operation, and electrical protection tests in accordance with applicable standards.
Yes. Technical support is available for the integration of the supplied battery system, including technical documentation, interface definitions, communication information, and troubleshooting support during system commissioning and debugging.