EP-4737916-A1 - CURRENT SAMPLING DEVICE, SYSTEM, AND CIRCUIT, AND VEHICLE

Abstract

Embodiments of the present application provide a current sampling apparatus, a current sampling system, a current sampling circuit, and a vehicle. The apparatus includes: a shunt, the shunt including a plurality of conductive connection members and at least one signal conversion member, where the plurality of conductive connection members are arranged sequentially, and the at least one signal conversion member is disposed in at least one conductive connection member group, the conductive connection member group including two adjacent conductive connection members; a circuit board, the circuit board being disposed on one side surface of the shunt, and the at least one signal conversion member being connected to the circuit board; and a signal measurement assembly, the signal measurement assembly being disposed on any one of the plurality of conductive connection members, and the signal measurement assembly being connected to the circuit board, where the signal measurement assembly is provided with a positive electrode sampling point and a negative electrode sampling point, the positive electrode sampling point and the negative electrode sampling point being disposed on side surfaces of the conductive connection member, respectively.

Inventors

• WU, ZHIHONG
• WANG, Xingchang

Assignees

• Contemporary Amperex Technology Co., Limited
• Contemporary Amperex Runzhi Software Technology Limited

Dates

Publication Date

20260506

Application Date

20240507

Claims (17)

1. A current sampling apparatus, comprising: a shunt comprising a plurality of conductive connection members and at least one signal conversion member, wherein the plurality of conductive connection members are arranged sequentially, and the at least one signal conversion member is disposed in at least one conductive connection member group, the conductive connection member group comprising two adjacent conductive connection members; a circuit board disposed on one side surface of the shunt, and the at least one signal conversion member being connected to the circuit board; and a signal measurement assembly disposed on any one of the plurality of conductive connection members, and the signal measurement assembly being connected to the circuit board, wherein the signal measurement assembly is provided with a positive electrode sampling point and a negative electrode sampling point, the positive electrode sampling point and the negative electrode sampling point being disposed on side surfaces of the conductive connection member, respectively.
2. The current sampling apparatus according to claim 1, wherein the positive electrode sampling point and the negative electrode sampling point are disposed on two opposite side surfaces of the conductive connection member, respectively.
3. The current sampling apparatus according to claim 1, wherein the plurality of conductive connection members are disposed spaced apart from each other, and the signal conversion member is located within at least a portion of a spacing between two adjacent ones of the conductive connection members.
4. The current sampling apparatus according to claim 1, wherein the signal conversion member is disposed between every two adjacent ones of the conductive connection members.
5. The current sampling apparatus according to any one of claims 1 to 4, wherein the circuit board comprises: a first sub-circuit board connected to the at least one signal conversion member; and a second sub-circuit board electrically connected to the first sub-circuit board and connected to the signal measurement assembly.
6. The current sampling apparatus according to any one of claims 1 to 4, wherein at least one side surface of the conductive connection member provided with the signal measurement assembly is provided with a notch, and the position of the notch corresponds to the position of the signal measurement assembly.
7. The current sampling apparatus according to claim 6, wherein the notch covers a projection of the signal measurement assembly on the side surface of the conductive connection member that is provided with the notch.
8. The current sampling apparatus according to any one of claims 1 to 4, further comprising: at least one temperature sensor disposed in correspondence with the at least one signal conversion member, the at least one temperature sensor being connected to the circuit board.
9. The current sampling apparatus according to any one of claims 1 to 4, wherein the circuit board is provided with a signal transmission member, the signal transmission member being electrically connected to the shunt and the signal measurement assembly, and the signal transmission member being configured to transmit electrical signals generated on the shunt and the signal measurement assembly.
10. The current sampling apparatus according to any one of claims 1 to 4, further comprising: a calibration identifier disposed on the circuit board.
11. The current sampling apparatus according to any one of claims 1 to 4, wherein the signal measurement assembly comprises at least one of a Hall effect component, a shunt component, or a magnetoresistive effect component.
12. A current sampling system, comprising: a battery and a sampling board; and the current sampling apparatus according to any one of claims 1 to 11; wherein the battery and the sampling board are separately connected to the current sampling apparatus.
13. A current sampling circuit, comprising: at least one shunt sampling module disposed in correspondence with at least one signal conversion member in the current sampling apparatus according to any one of claims 1 to 11; a signal sampling module corresponding to a signal measurement assembly in the current sampling apparatus according to any one of claims 1 to 11; and a main control module configured to be separately connected to the at least one shunt sampling module and the signal sampling module.
14. The current sampling circuit according to claim 13, wherein the signal sampling module comprises a storage sub-module configured to back up calibration data.
15. The current sampling circuit according to claim 13, wherein the signal sampling module further comprises a signal modulation sub-module configured to amplify and shape a voltage signal generated by the signal measurement assembly.
16. The current sampling circuit according to any one of claims 13 to 15, wherein the signal sampling module further comprises an over current detection sub-module configured to perform over current detection on a current signal sampled by the signal sampling module.
17. A vehicle, comprising the current sampling system according to claim 12 or the current sampling circuit according to claim 13.

Description

CROSS-REFERENCE TO RELATED APPLICATION The present application claims priority to Chinese Patent Application No. 202322442551.0, entitled "CURRENT SAMPLING APPARATUS, SYSTEM, AND CIRCUIT, AND VEHICLE", filed on September 8, 2023, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD The present application relates to the technical field of battery management systems, and in particular, to a current sampling apparatus, a current sampling system, a current sampling circuit, and a vehicle. BACKGROUND As the new energy vehicle industry continues to develop rapidly, the detection of battery management systems is particularly important, especially the real-time monitoring of current data of a vehicle during driving and charging processes. Currently, to ensure the accuracy in current detection, it is typically necessary to use different components for primary sampling and redundant sampling, resulting in large structural dimensions of the entire current sampling apparatus, which is not conducive to miniaturization. SUMMARY Embodiments of the present application provide a current sampling apparatus, a current sampling system, a current sampling circuit, and a vehicle, to solve the technical problem of the large dimensions of the current sampling apparatus, which is not conducive to miniaturization. In a first aspect, embodiments of the present application provide a current sampling apparatus, including: a shunt comprising a plurality of conductive connection members and at least one signal conversion member, wherein the plurality of conductive connection members are arranged sequentially, and the at least one signal conversion member is disposed in at least one conductive connection member group, the conductive connection member group comprising two adjacent conductive connection members;a circuit board disposed on one side surface of the shunt, and the at least one signal conversion member being connected to the circuit board; anda signal measurement assembly disposed on any one of the plurality of conductive connection members, and the signal measurement assembly being connected to the circuit board, wherein the signal measurement assembly is provided with a positive electrode sampling point and a negative electrode sampling point, the positive electrode sampling point and the negative electrode sampling point being disposed on side surfaces of the conductive connection member, respectively. In this embodiment, the shunt and the signal measurement assembly are integrally designed, which achieves multi-channel sampling while reducing the structural dimensions, thereby facilitating miniaturization. Meanwhile, sampling is performed through the signal measurement assembly without the need for a magnetic core, which, on the one hand, further reduces the structural dimensions, and on the other hand, avoids the risk of affecting sampling accuracy due to magnetic core saturation. In some embodiments, the positive electrode sampling point and the negative electrode sampling point are disposed on two opposite side surfaces of the conductive connection member, respectively. In this embodiment, by disposing the positive electrode sampling point and the negative electrode sampling point on two opposite side surfaces of the conductive connection member, respectively, current signals in opposite directions can be collected, thereby achieving differential sampling and further improving the sampling accuracy. In some embodiments, the plurality of conductive connection members are disposed spaced apart from each other, and the signal conversion member is located within at least a portion of a spacing between two adjacent ones of the conductive connection members. In this embodiment, by disposing the plurality of conductive connection members spaced apart from each other and locating the signal conversion member within at least a portion of the spacing between two adjacent ones of the conductive connection members, mutual interference between signals generated on the conductive connection members can be reduced, resulting in higher sampling accuracy. In some embodiments, the signal conversion member is disposed between every two adjacent ones of the conductive connection members. In this embodiment, by disposing the signal conversion member between every two adjacent ones of the conductive connection members, that is, disposing one signal conversion member between every two adjacent conductive connection members, the structure of the shunt module can be made more compact, further reducing the structural dimensions and facilitating miniaturization. In some embodiments, the circuit board includes: a first sub-circuit board connected to the at least one signal conversion member; anda second sub-circuit board electrically connected to the first sub-circuit board and connected to the signal measurement assembly. In this embodiment, the integrated design of the shunt and the signal measurement assembly is imp