电池包断路单元的状态检测方法、电池管理器及车辆
By calculating the contact resistance value of the switching device in the battery pack circuit breaker unit, the cost and applicability issues caused by adding a temperature sensor in the prior art are solved, enabling early identification and effective response to BDU thermal safety issues.
CN122402244APending Publication Date: 2026-07-17DONGFENG MOTOR GRP
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- DONGFENG MOTOR GRP
- Filing Date
- 2026-04-30
- Publication Date
- 2026-07-17
AI Technical Summary
Technical Problem
Existing technologies require the addition of temperature sensors when monitoring the thermal safety of battery distribution units (BDUs), which increases system costs and limits the universality and portability of hardware platforms.
Method used
By utilizing existing voltage and current sampling points in the battery pack circuit breaker unit, the contact resistance value of the switching device can be calculated to determine whether a fault exists, thus avoiding direct temperature monitoring.
Benefits of technology
It effectively identifies early signs of thermal safety issues in BDUs, reduces reliance on temperature sensors, lowers system costs, and improves applicability and portability across different hardware platforms.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN122402244A_ABST
Abstract
本申请提供了一种电池包断路单元的状态检测方法、电池管理器及车辆，属于电池组件检测技术领域，电池包断路单元的状态检测方法包括：在行车上电过程中，控制第一开关器件与预充开关器件闭合，获取第一电压采样点与第二电压采样点之间的第一电压差值，以及获取流过第一开关器件的第一电流值；其中，第一电压采样点位于第一开关器件和电池包的负极之间，第二电压采样点位于第一开关器件和放电口的负极之间；基于第一电压差值与第一电流值的比值，获取第一开关器件的第一接触电阻阻值；基于第一接触电阻值，确定第一开关器件是否存在故障。通过本发明所提供的方法，可以在热量累积至故障阈值前提前识别故障。
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