EP-4737186-A1 - BATTERY BOX, BATTERY SYSTEM AND VEHICLE

EP4737186A1EP 4737186 A1EP4737186 A1EP 4737186A1EP-4737186-A1

Abstract

A battery box, a battery system and a vehicle. The battery box (10) comprises: a plurality of battery branches (11), which are connected in parallel, wherein each of the plurality of battery branches (11) comprises a battery (11a); branch interfaces (12), which are arranged corresponding to the battery branches (11), wherein the branch interfaces (12) are electrically connected to the corresponding battery branches (11) and are configured to connect to external battery boxes (20); a high-voltage power distribution module (13), which is electrically connected to the battery branches (11) and is configured to perform power distribution management and monitoring on the battery branches (11); and a main loop output interface (14), which is electrically connected to the battery branches (11) and the high-voltage power distribution module (13), respectively, and is configured to connect to a power supply interface of a vehicle (1000). Electric energy is provided by means of the plurality of battery branches (11) connected in parallel, and the branch interfaces (12) are provided to connect to the external battery boxes (20), so as to connect batteries in the external battery boxes (20) to the high-voltage power distribution module (13), such that the high-voltage power distribution module (13) can couple electric energy of the plurality of battery branches (11) connected in parallel, thereby realizing high-voltage power distribution; and the function of a high-voltage power distribution box is integrated in the battery box (10), thereby improving the integration level of a battery system.

Inventors

WU, KAI
YANG, Zhengxing
LIU, BIN
LI, KUN

Assignees

Contemporary Amperex Technology Co., Limited

Dates

Publication Date: 20260506
Application Date: 20230925

Claims (20)

A battery case, comprising: a plurality of battery branches, wherein the plurality of battery branches are connected in parallel, and each of the plurality of battery branches comprises a battery; branch interfaces arranged corresponding to the battery branches, wherein the branch interfaces are electrically connected to the corresponding battery branches, and are configured to be connected to an external battery case; a high-voltage power distribution module, electrically connected to the battery branches and configured to perform power distribution management and monitoring on the battery branches; and a main circuit output interface, electrically connected to the battery branches and the high-voltage power distribution module and configured to be connected to a power supply interface of a vehicle.
The battery case according to claim 1, wherein different battery branches comprise an equal number of batteries.
The battery case according to claim 1, wherein the branch interface comprises: a positive electrode branch interface, electrically connected to a positive electrode of the battery in the battery branch and configured to be connected to a positive electrode interface of the external battery case; and a negative electrode branch interface, electrically connected to a negative electrode of the battery in the battery branch and configured to be connected to a negative electrode interface of the external battery case.
The battery case according to claim 1, wherein the battery case further comprises: a protection module, electrically connected to the battery branch.
The battery case according to claim 4, wherein the protection module comprises: a battery branch protection unit, connected to the battery of the battery branch; and a main circuit protection unit, connected between the battery branch and the main circuit output interface.
The battery case according to claim 5, wherein the main circuit protection unit comprises: a main circuit positive electrode protection component, connected between a positive electrode branch interface and the main circuit output interface; and a main circuit negative electrode protection component, connected between a negative electrode branch interface and the main circuit output interface.
The battery case according to claim 5, wherein the battery branch protection unit comprises a fuse.
The battery case according to claim 6, wherein the main circuit positive electrode protection component comprises a first relay.
The battery case according to claim 6, wherein the main circuit positive electrode protection component further comprises a second relay.
The battery case according to claim 5, wherein the protection module further comprises: a pre-charge unit, wherein the pre-charge unit is connected in parallel with the main circuit protection unit.
The battery case according to claim 3, wherein the battery branch further comprises: a current sensing module, connected to the negative electrode branch interface.
The battery case according to claim 1, wherein the high-voltage power distribution module comprises: a first sampling unit, electrically connected to the battery branch and configured to acquire a working parameter of the battery; a second sampling unit, electrically connected to the main circuit output interface and configured to acquire a bus voltage; and a battery management unit, connected to the first sampling unit and the second sampling unit for power distribution management and monitoring.
The battery case according to claim 1, wherein the main circuit output interface comprises a high-voltage power terminal and a low-voltage terminal.
The battery case according to claim 13, wherein the main circuit output interface comprises a quick-swap electrical connector.
The battery case according to any one of claims 1 to 14, wherein the battery case further comprises: a communication interface, electrically connected to the high-voltage power distribution module and configured to be connected to the external battery case.
The battery case according to claim 15, wherein the battery case further comprises: a debugging and diagnosis interface, electrically connected to the battery branch and configured to be connected to a test device.
The battery case according to claim 16, wherein the battery case further comprises a water inlet and a water outlet.
The battery case according to claim 17, wherein the battery case comprises a case body; and the batteries are placed on two sides inside the case body, and electrical elements of the battery case are placed between the batteries on the two sides.
The battery case according to claim 18, wherein the main circuit output interface is provided on an upper surface of the case body.
The battery case according to claim 18, wherein the branch interface, the communication interface, the debugging and diagnosis interface, the water inlet, and the water outlet are provided on a vertical surface of the case body.

Description

The present application claims priority to Chinese Patent Application No. 202321746961.8, filed with the China National Intellectual Property Administration on July 5, 2023 and entitled "BATTERY CASE, BATTERY SYSTEM, AND VEHICLE", which is incorporated herein by reference in its entirety. TECHNICAL FIELD The present application relates to the technical field of batteries, and in particular, to a battery case, a battery system, and a vehicle. BACKGROUND With the continuous development of electric vehicles and hybrid vehicles, users have increasingly higher requirements for battery cases of vehicles, and hope that the shorter the charging time of the battery cases, the better. In order to improve the endurance of the vehicle and reduce the user's waiting time for the charging of the vehicle, a quick-swap technology for a rechargeable battery is currently proposed. The quick-swap technology refers to direct replacement with a charged battery case for an electric vehicle, and the battery case that originally needs to be charged is placed in a battery swapping station for charging, thereby reducing the user's waiting time for charging the electric vehicle. At present, the battery system needs to be additionally configured with a high-voltage power distribution box, and the high-voltage power distribution box is used to perform power distribution management and monitoring on the battery case, resulting in the problem of a low integration level. TECHNICAL PROBLEM The present application provides a battery case and a vehicle, which solve the problem of a low integration level in the current battery system of an electric vehicle. TECHNICAL SOLUTION To achieve the above objective, the present application adopts the following technical solutions. In a first aspect, a battery case is provided. The battery case includes: a plurality of battery branches, where the plurality of battery branches are connected in parallel, and each of the plurality of battery branches includes a battery; branch interfaces arranged corresponding to the battery branches, where the branch interfaces are electrically connected to the corresponding battery branches, and are configured to be connected to an external battery case;a high-voltage power distribution module, electrically connected to the battery branches and configured to perform power distribution management and monitoring on the battery branches; anda main circuit output interface, electrically connected to the battery branches and the high-voltage power distribution module and configured to be connected to a power supply interface of a vehicle. In the embodiments of the present application, the high-voltage power distribution module of a high-voltage power distribution box is integrated in the battery case, and the high-voltage power distribution module inside the battery case is used to perform power distribution management and monitoring on the plurality of parallel battery branches in the battery case, thereby improving the integration level of a battery system of an electric vehicle. In an implementation of the first aspect, different battery branches include an equal number of batteries. In an implementation of the first aspect, the branch interface includes: a positive electrode branch interface, electrically connected to a positive electrode of the battery in the battery branch and configured to be connected to a positive electrode interface of the external battery case; and a negative electrode branch interface, electrically connected to a negative electrode of the battery in the battery branch and configured to be connected to a negative electrode interface of the external battery case. In an implementation of the first aspect, the battery case further includes: a protection module, electrically connected to the battery branch. In an implementation of the first aspect, the protection module includes: a battery branch protection unit, connected to the battery of the battery branch; and a main circuit protection unit, connected between the battery branch and the main circuit output interface. In an implementation of the first aspect, the main circuit protection component includes: a main circuit positive electrode protection component, connected between a positive electrode branch interface and the main circuit output interface; anda main circuit negative electrode protection component, connected between a negative electrode branch interface and the main circuit output interface. In an implementation of the first aspect, the battery branch protection unit includes a fuse. In the embodiments of the present application, the fuse is provided in each battery branch. In the case of overvoltage, overcurrent, or the like, the fuse blows to protect the battery in the battery branch, thus improving the safety of the battery case. In an implementation of the first aspect, the main circuit positive electrode protection component includes a first relay. The main circuit positive electro