US-20260128410-A1 - BATTERY MODULE AND BATTERY PACK

US20260128410A1US 20260128410 A1US20260128410 A1US 20260128410A1US-20260128410-A1

Abstract

A battery module, including a frame body, a plurality of bare cells, a sealing assembly and a cooling assembly. The frame body internally has an accommodating space. The bare cells are arranged in the accommodating space. The sealing assembly is connected to the frame body, and is configured to seal the accommodating space. The cooling assembly includes a liquid inlet pipe, a liquid inlet connector and a liquid outlet connector. The liquid inlet connector and the liquid outlet connector are provided on the same outer side of the frame body. The liquid inlet pipe is provided inside the accommodating space. One end of the liquid inlet pipe is connected to the liquid inlet connector, and the other end of the liquid inlet pipe extends to a side of the accommodating space away from the liquid inlet connector.

Inventors

Lin Zheng
Shiqiang Sun

Assignees

BatteroTech Corporation Limited

Dates

Publication Date: 20260507
Application Date: 20251219
Priority Date: 20231201

Claims (7)

1 . A battery module, comprising: a frame body; a plurality of bare cells; a sealing assembly; and a cooling assembly; wherein the frame body internally has an accommodating space; the plurality of bare cells are arranged within the accommodating space; the sealing assembly is connected to the frame body, and is configured to seal the accommodating space; the cooling assembly comprises a liquid inlet pipe, a liquid inlet connector and a liquid outlet connector; the liquid inlet connector and the liquid outlet connector are provided on an outer side of the frame body, and are located on the same side of the frame body; the liquid inlet pipe is provided inside the accommodating space; a first end of the liquid inlet pipe is connected to the liquid inlet connector, and a second end of the liquid inlet pipe is configured to extend to a side of the accommodating space away from the liquid inlet connector; and the second end of the liquid inlet pipe is configured to be open; a bottom of the frame body is provided with a plurality of positioning grooves; each of the plurality of positioning grooves is provided with a first sealing gasket; the plurality of bare cells are respectively provided in the plurality of positioning grooves, and are configured to press against the first sealing gasket; a bottom wall of each of the plurality of positioning grooves is provided with an avoidance hole; the first sealing gasket is annular in shape; the avoidance hole is aligned with a middle of the first sealing gasket; a bottom of each of the plurality of bare cells is provided with an explosion-proof valve; and the explosion-proof valve is configured to be exposed through the avoidance hole; and the sealing assembly comprises a wire harness board, a conductive busbar and an output terminal; the conductive busbar is integrated within the wire harness board; the conductive busbar is provided with an electrical connection portion electrically connected to the plurality of bare cells; the wire harness board is provided with an avoidance groove configured to allow the electrical connection portion to be exposed; the electrical connection portion is weldedly connected to terminals of the plurality of bare cells; the conductive busbar is electrically connected to the output terminal; and the output terminal is provided on a side of the wire harness board for outputting electrical energy.
2 . The battery module of claim 1 , wherein the liquid outlet connector is provided at a top of an outer sidewall of the frame body.
3 . The battery module of claim 1 , wherein the cooling assembly further comprises an expansion tank; and the expansion tank is provided at an outlet end of the liquid outlet connector, and is configured to discharge a heat transfer medium.
4 . The battery module of claim 1 , wherein the bottom wall of each of the plurality of positioning grooves is further provided with an accommodating groove; the first sealing gasket is provided in the accommodating groove; and the first sealing gasket is configured to partially protrude out of the accommodating groove.
5 . The battery module of claim 1 , wherein a side of the wire harness board close to the plurality of bare cells is provided with a plurality of positioning structures; the plurality of positioning structures are configured to enclose a limiting groove; and the limiting groove is configured to accommodate a top of each of the plurality of bare cells.
6 . The battery module of any one of claims 1-3 , further comprising: a second sealing gasket; wherein the second sealing gasket is configured to be pressed between the sealing assembly and the frame body.
7 . A battery pack, comprising: the battery module of any one of claims 1 - 6 .

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application is a continuation of International Patent Application No. PCT/CN2024/133320, filed on Nov. 20, 2024, which claims the benefit of priority from Chinese Patent Application No. 202311630704.2, filed on Dec. 1, 2023 and titled “Battery module and battery pack”. The content of the aforementioned application, including any intervening amendments thereto, is incorporated herein by reference in its entirety. TECHNICAL FIELD This application relates to batteries, and more particularly to a battery module and a battery pack. BACKGROUND With the advancement of science and technology, the concept of new energy has been increasingly popularized, and the use of new energy batteries has also become more prevalent. During the operation of the existing lithium batteries, the output of electrical energy is accompanied by the generation of a significant amount of heat, leading to a temperature rise. However, excessively high temperatures will easily cause failures of lithium batteries. In this regard, it is necessary to perform thermal management on the lithium batteries. Current lithium battery products all require fast-charging capabilities. However, it has been found that traditional lithium batteries suffer from at least the following drawbacks: when the fast-charging rate reaches 4 C or higher, severe heating will occur in both the battery body and conductors, making air cooling and indirect liquid cooling insufficient to meet the thermal management requirements. SUMMARY An object of the disclosure is to provide a battery module and a battery pack to address the technical problem in the prior art that it is difficult to satisfy the thermal management requirements of batteries. Technical solutions of the present disclosure are described as follows. In a first aspect, this application provides a battery module, including: a frame body;a plurality of bare cells;a sealing assembly; anda cooling assembly;wherein the frame body internally has an accommodating space;the plurality of bare cells are arranged within the accommodating space;the sealing assembly is connected to the frame body, and is configured to seal the accommodating space;the cooling assembly includes a liquid inlet pipe, a liquid inlet connector and a liquid outlet connector;the liquid inlet connector and the liquid outlet connector are provided on an outer side of the frame body, and are located on the same side of the frame body;the liquid inlet pipe is provided inside the accommodating space; anda first end of the liquid inlet pipe is connected to the liquid inlet connector, and a second end of the liquid inlet pipe is configured to extend to a side of the accommodating space away from the liquid inlet connector; and the second end of the liquid inlet pipe is configured to be open. In some embodiments, the liquid outlet connector is provided at a top of an outer sidewall of the frame body. In some embodiments, the cooling assembly further includes an expansion tank; and the expansion tank is provided at an outlet end of the liquid outlet connector, and is configured to discharge a heat transfer medium. In some embodiments, the bare cells are cylindrical cells; and the liquid inlet pipe is configured in a corrugated shape to avoid the bare cells. In some embodiments, a bottom of the frame body is provided with a plurality of positioning grooves; each of the plurality of positioning grooves is provided with a first sealing gasket; andthe plurality of bare cells are respectively provided in the plurality of positioning grooves, and are configured to press against the first sealing gasket. In some embodiments, the bottom wall of each of the plurality of positioning grooves is further provided with an accommodating groove; the first sealing gasket is provided in the accommodating groove; and the first sealing gasket is configured to partially protrude out of the accommodating groove. In some embodiments, a bottom wall of each of the plurality of positioning grooves is provided with an avoidance hole; the first sealing gasket is annular in shape;the avoidance hole is aligned with a middle of the first sealing gasket;a bottom of each of the plurality of bare cells is provided with an explosion-proof valve; andthe explosion-proof valve is configured to be exposed through the avoidance hole. In some embodiments, the sealing assembly includes a wire harness board, a conductive busbar and an output terminal; the conductive busbar is integrated within the wire harness board;the conductive busbar is provided with an electrical connection portion electrically connected to the plurality of bare cells;the wire harness board is provided with an avoidance groove configured to allow the electrical connection portion to be exposed;the electrical connection portion is weldedly connected to terminals of the plurality of bare cells;the conductive busbar is electrically connected to the output terminal; andthe output terminal