# US 12,770,965 B2 · Battery pack

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- Number: US 12,770,965 B2
- Document ID: US12770965B2
- Status: Granted
- Kind: B2
- Application number: 18/331,829
- Filed: 2023-06-08
- Published: 2023-10-05
- Granted: 2026-10-20
- Earliest claimed: 2018-12-29
- Assignees: Contemporary Amperex Technology (Hong Kong) Limited
- Applicants: Contemporary Amperex Technology (Hong Kong) Limited
- Inventors: Lilei Su; Shaozhen Chen; Renwei Zheng
- Web page: https://patentgrep.com/patent/US12770965B2

## CPC

- H01M 50/209: adapted for prismatic or rectangular cells (H01M50/216 takes precedence)
- H01M 50/262: with fastening means, e.g. locks
- H01M 2220/20: Batteries in motive systems, e.g. vehicle, ship, plane
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY

## Abstract

The present disclosure provides a battery pack including a casing and a battery module housed in the casing. The battery module can include a plurality of batteries arranged along a length direction and an end plate located at an end of the plurality of batteries in the length direction. The end plate can include a main body portion and a lug integrally formed with the main body portion, wherein the lug protrudes outwardly from the main body portion along the length direction and is fixedly connected to the casing. The design disclosed herein reduces the number of the components that are fixedly connected between the end plate and the casing, the number of steps in the operating procedure, and the production cost.

## Claims

### Claim 1

A battery pack, comprising:
a casing comprising a support beam;
a plurality of fasteners; and
a battery module housed in the casing, the battery module is a two-layer battery module comprising a lower layer and an upper layer stacked in a height direction;
the battery module comprising:
a plurality of batteries arranged along a length direction; and
an end plate located at an end of the plurality of batteries in the length direction;
the end plate comprising:
a main body portion; and
at least one lug protruding outwardly from the main body portion along the length direction and fixedly connected to the casing,
wherein the at least one lug comprises a lower-layer lug corresponding to the lower layer and an upper-layer lug corresponding to the upper layer,
the at least one lug is provided with a plurality of first mounting holes penetrating in a height direction, each of the plurality of first mounting holes is an elongated hole extending in the length direction to absorb a length tolerance of the battery module,
the support beam is provided with a plurality of second mounting holes respectively corresponding to the plurality of first mounting holes on the lower-layer lug and penetrating entirely through the support beam in the height direction,
a first fastener of the plurality of fasteners passes through one of the plurality of first mounting holes on the lower-layer lug and a corresponding one of the plurality of second mounting holes of the support beam to fixedly connect the lower layer and the support beam,
a second fastener of the plurality of fasteners passes through one of the plurality of first mounting holes of the upper-layer lug, another one of the plurality of first mounting holes of the lower-layer lug, and another one of the plurality of second mounting holes of the support beam to fixedly connect the upper layer to the support beam.

### Claim 2 (depends on 1)

The battery pack according to claim 1, wherein a position of the lower-layer lug of the at least one lug in a height direction is located at a middle portion in the height direction of the main body portion of the end plate corresponding to the lower layer.

### Claim 3 (depends on 1)

The battery pack according to claim 1, wherein the at least one lug is in a shape of a solid flat plate.

### Claim 4 (depends on 1)

The battery pack according to claim 1, wherein a highest point in the height direction of each of the plurality of fasteners is lower than an upper surface of the battery module, and a lowest point in the height direction of each of the plurality of fasteners is higher than a lower surface of the battery module.

### Claim 5 (depends on 1)

The battery pack according to claim 1, wherein each of the plurality of second mounting holes penetrates the support beam in the height direction, each of the plurality of fasteners is a threaded connection element.

### Claim 6 (depends on 1)

The battery pack according to claim 1, wherein the casing comprises a frame, and an end of the support beam is connected to the frame.

### Claim 7 (depends on 1)

The battery pack according to claim 1, wherein the lower-layer lug is integrally formed with the main body portion of the end plate corresponding to the lower layer, and the upper-layer lug is integrally formed with the main body portion of the end plate corresponding to the upper layer.

### Claim 8 (depends on 1)

The battery pack according to claim 1, wherein the lower-layer lug comprises a plurality of lower-layer lugs protruding outwardly from the main body portion of the end plate corresponding to the lower layer along the length direction, the plurality of lower-layer lugs are spaced apart from each other in a width direction of the battery module.

### Claim 9 (depends on 1)

The battery pack according to claim 1, wherein the support beam supports the lower-layer lug from below, and the lower-layer lug is arranged between the upper-layer lug and the support beam in the height direction at a position through which the second fastener passes.

### Claim 10 (depends on 1)

The battery pack according to claim 1, wherein the first mounting hole of the upper-layer lug, the another one of the plurality of first mounting holes of the lower-layer lug, and the another one of the plurality of second mounting holes of the support beam are aligned with one another in the height direction.