CN-121986412-A - Battery assembly and vehicle including the same

CN121986412ACN 121986412 ACN121986412 ACN 121986412ACN-121986412-A

Abstract

The battery assembly according to the present invention includes a plurality of batteries, a bus bar electrically connected to electrode leads of the plurality of batteries, and a bus bar frame coupled to the bus bar to support the bus bar, and provided with a bus bar socket into which a portion of the bus bar is inserted. The bus bar includes a body portion to which the electrode leads are coupled to overlap each other, and a plug portion that is integral with the body portion and extends from the body portion toward the bus bar frame and is inserted into the bus bar receptacle to enable the body portion to be fixed to the bus bar frame.

Inventors

ZHANG CHENGHUAN
Jin Guanyou
CUI HAIYUAN

Assignees

株式会社LG新能源

Dates

Publication Date: 20260505
Application Date: 20250722
Priority Date: 20240813

Claims (12)

1. A battery assembly, the battery assembly comprising: A plurality of batteries; A bus bar electrically connected to electrode leads of the plurality of cells, and A bus bar frame having a bus bar socket into which a portion of the bus bar is inserted, the bus bar frame being coupled to the bus bar and supporting the bus bar, Wherein the bus bar includes: a main body portion to which the electrode leads are coupled after overlapping each other, and A plug portion integral with the body portion, the plug portion extending from the body portion toward the bus bar frame and configured to be inserted into the bus bar receptacle to secure the body portion to the bus bar frame.
2. The battery pack according to claim 1, Wherein the body portion has a band shape or a bar shape.
3. The battery pack according to claim 1, Wherein the bus bar receptacle includes a first receptacle and a second receptacle, the first receptacle and the second receptacle being positioned spaced apart from each other with the bus bar between the first receptacle and the second receptacle, and Wherein the plug portion includes a first plug and a second plug that are inserted into the first socket and the second socket, respectively.
4. The battery pack according to claim 1, Wherein the plug part is provided with a through hole, Wherein the bus bar frame further has a coupling protrusion protruding from an inner surface of the bus bar receptacle, and Wherein the coupling protrusion is configured to be inserted into the through hole of the plug portion when the plug portion is inserted into the bus bar receptacle.
5. The battery assembly of claim 1, further comprising: A sensing circuit for sensing voltages of the plurality of batteries, and And a connection pin electrically connecting the bus bar and the sensing circuit.
6. The battery pack according to claim 5, Wherein, the connecting pin includes: A first connection portion fixed to an inner surface of the bus bar socket so as to be in contact with the plug portion inserted into the bus bar socket; an extension part having one end connected to the first connection part and the other end extending from the inside of the bus bar socket to the outside of the bus bar socket, and And a second connection part electrically connected to the sensing circuit by extending from the other end of the extension part.
7. The battery pack according to claim 5, Wherein the connection pin is made of a single metal plate.
8. The battery pack according to claim 5, Wherein the bus bar frame and the connection pin are formed integrally with each other by insert molding.
9. The battery pack according to claim 1, Wherein the electrode leads of the plurality of batteries are coupled to the main body portion of the bus bar by welding, and Wherein the bus bar frame further includes a pocket provided in a portion of the bus bar frame adjacent to the main body portion to catch foreign matter generated during a welding process.
10. The battery assembly of claim 9, further comprising: A fire-resistant cover made of a material having a relatively higher melting point than that of the material forming the bus bar frame so as to cover the inner surface of the pouch.
11. The battery pack according to claim 1, Wherein the plurality of cells are arranged side by side with each other, and Wherein the electrode leads of the cells arranged relatively far from the bus bar among the plurality of cells are configured to be longer than the electrode leads of the other cells arranged relatively close to the bus bar.
12. A vehicle comprising the battery assembly according to any one of claims 1 to 11.

Description

Battery assembly and vehicle including the same Technical Field The present application is based on and claims priority from korean patent application No. 10-2024-0108389, filed on the intellectual property part of korea on month 13 of 2024, the disclosure of which is incorporated herein by reference in its entirety. The present disclosure relates to a battery assembly and a vehicle including the same, and more particularly, to a battery assembly having a plurality of rechargeable batteries, and a battery pack and a vehicle including the same. Background In general, batteries that can be repeatedly charged and discharged, such as lithium ion batteries, lithium polymer batteries, nickel cadmium batteries, nickel hydrogen batteries, and nickel zinc batteries, can provide an output voltage of about 2.5V to 4.2V. Recently, as these batteries are applied to devices requiring high output voltage/current and large charge capacity, such as electric vehicles or ESS (energy storage system), a battery assembly (such as a battery module or a battery pack) composed of a plurality of batteries connected in series and/or in parallel is being widely used. However, the related art has a problem in that electrode leads of the batteries are connected to different portions of the bus bar having a wide plate shape in order to connect a plurality of batteries outputting a high current in parallel or connect the batteries connected in parallel with other batteries connected in parallel such that a current path within the bus bar is different for each battery, thereby causing deviation in current value output of each battery and thus, causing performance difference or charge imbalance between the batteries. Further, since the prior art couples the bus bar and the bus bar frame supporting the bus bar by separate fastening members and welds the electrode leads of the battery to different portions of the bus bar, not only is a great deal of time and cost required to assemble the battery assembly, but there is also a problem in that foreign substances such as spatter generated during the welding process may cause malfunction, electrical short circuit, fire, etc. of the battery assembly. Disclosure of Invention Technical problem The technical challenge sought to be solved by the present disclosure is to provide a battery assembly that is easy to assemble and requires a short time to assemble while reducing the deviation in current value output of each battery and structurally preventing the performance difference or charge capacity imbalance between the batteries, and a vehicle including such a battery assembly. Technical proposal A battery assembly according to one aspect of the present disclosure includes a plurality of batteries, a bus bar electrically connected to electrode leads of the plurality of batteries, and a bus bar frame having a bus bar socket into which a portion of the bus bar is inserted, the bus bar frame being coupled to the bus bar and supporting the bus bar, wherein the bus bar includes a body portion to which the electrode leads are coupled after overlapping each other, and a plug portion integrally formed with the body portion, the plug portion extending from the body portion toward the bus bar frame and configured to be inserted into the bus bar socket to fix the body portion to the bus bar frame. In an embodiment, the body portion may have a band shape or a bar shape. In an embodiment, the bus bar receptacle may include a first receptacle and a second receptacle positioned to be spaced apart from each other, and the bus bar is located between the first receptacle and the second receptacle, and the plug portion may include a first plug and a second plug inserted into the first receptacle and the second receptacle, respectively. In an embodiment, the plug portion may have a through hole, the bus bar frame may further have a coupling protrusion protruding from an inner surface of the bus bar socket, and the coupling protrusion may be configured to be inserted into the through hole of the plug portion when the plug portion is inserted into the bus bar socket. In an embodiment, the battery assembly may further include a sensing circuit for sensing voltages of the plurality of batteries, and a connection pin electrically connecting the bus bar and the sensing circuit. In an embodiment, the connection pin may include a first connection portion fixed to an inner surface of the bus bar socket so as to be in contact with the plug portion inserted into the bus bar socket, an extension portion having one end connected to the first connection portion and the other end extending from an inside of the bus bar socket to an outside of the bus bar socket, and a second connection portion electrically connected to the sensing circuit by extending from the other end of the extension portion. In an embodiment, the connection pin may be manufactured from a single metal plate. In an embodiment, the bus bar frame and the connection pin