电池管理系统、电池系统和车辆

Abstract

本公开涉及一种电池管理系统、电池系统和车辆；电池管理系统，包括：多个漏液传感器，所述多个漏液传感器分别布置在电池的不同位置，其中，各个漏液传感器的电压用于表征该漏液传感器所布置的电池位置的漏液情况；电压检测单元，与所述多个漏液传感器分别连接，用于检测多个漏液传感器分别对应的电压；漏液检测单元，与所述电压检测单元连接，用于根据多个漏液传感器分别对应的电压，确定所述多个漏液传感器分别布置的电池位置的漏液状态。该电池管理系统，通过在电池的不同位置布置漏液传感器，实现不同电池位置的漏液状态检测，进而可以保障电池的安全性。

Claims

1. A battery management system, characterized by, include: Multiple leakage sensors are arranged at different locations on the battery, wherein the voltage of each leakage sensor is used to characterize the leakage state at the battery location where the leakage sensor is arranged. A voltage detection unit is connected to the plurality of leakage sensors respectively, and is used to detect the voltage corresponding to the plurality of leakage sensors respectively; A leakage detection unit, connected to the voltage detection unit, is used to determine the leakage status of the battery positions where the multiple leakage sensors are respectively arranged, based on the voltages corresponding to the multiple leakage sensors.

2. The battery management system of claim 1, wherein, The battery management system further includes a target resistor, and each leakage sensor is connected to the voltage detection unit via the corresponding target resistor.

3. The battery management system of claim 2, wherein, The target resistance parameters corresponding to the multiple leakage sensors are different.

4. The battery management system of any one of claims 1-3, wherein, The battery management system further includes: a switching unit; The first terminal of the switching unit is connected to the power supply of the battery management system, and the second terminal of the switching unit is grounded; the first terminal of the voltage detection unit is connected to the first terminal of the switching unit, and the second terminal of the voltage detection unit is connected to the plurality of leakage sensors respectively.

5. The battery management system of claim 4, wherein, The switching unit includes a field-effect transistor (FET), a first resistor, and a second resistor. The first terminal of the switching unit is the source of the FET, and the second terminal of the switching unit is the drain of the FET. The gate of the FET is connected to an excitation signal source, and the gate of the FET is used to input the excitation signal provided by the excitation signal source. The source of the FET is connected to the power supply via the first resistor, and the source of the FET is connected to the voltage detection unit via the second resistor.

6. The battery management system of claim 4, wherein, The voltage detection unit includes: a voltage acquisition unit and voltage detection circuits corresponding to multiple leakage sensors; The voltage detection circuit corresponding to each leakage sensor includes: a third resistor, the first end of which is connected to the first end of the switching unit and the first end of the leakage sensor; and a first capacitor, the first end of which is connected to the second end of the third resistor and the second end of the first capacitor is connected to the second end of the leakage sensor. The voltage acquisition unit is connected to the voltage detection circuit corresponding to each leakage sensor, and is used to acquire the voltage signal between the first end of the first capacitor and the second end of the third resistor in the voltage detection circuit corresponding to each leakage sensor. The voltage signal in the voltage detection circuit corresponding to each leakage sensor is used to characterize the voltage of the leakage sensor.

7. The battery management system of claim 6, wherein, Each leakage sensor's voltage detection circuit also includes a second capacitor and a third capacitor. The first end of the third resistor is connected to the first end of the leakage sensor via the second capacitor, and the second end of the first capacitor is connected to the second end of the leakage sensor via the third capacitor.

8. The battery management system according to any one of claims 1 to 3, characterized in that, Each leakage sensor includes: a fourth resistor, a fifth resistor, and a fourth capacitor; The first end of the fourth resistor is connected to the first end of the fifth resistor, the second end of the fourth resistor is connected to the first end of the fourth capacitor, and the second end of the fifth resistor is connected to the second end of the fourth capacitor. The voltage of each leakage sensor is the voltage between the first terminal of the fifth resistor and the first terminal of the fourth capacitor of that leakage sensor.

9. The battery management system of claim 8, wherein, The plurality of leakage sensors include leakage sensors with the same parameters, wherein the parameters of the fourth resistor, the fifth resistor, and the fourth capacitor of the leakage sensors with the same parameters are all the same, and / or, the plurality of leakage sensors include leakage sensors with different parameters, wherein at least one of the parameters of the fourth resistor, the fifth resistor, and the fourth capacitor of the leakage sensors with different parameters is different.

10. The battery management system of claim 1, wherein, The battery includes multiple drain valves located at different positions, and multiple leakage sensors are respectively arranged at different drain valve locations.

11. A battery system, characterized in that, include: At least one battery; The battery management system as described in any one of claims 1 to 10.

12. A vehicle characterized by comprising: include: The battery system as described in claim 11.

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