US-12620668-B2 - Battery

Abstract

A battery includes a shell, a cell module, and a circuit board. The shell includes a first housing, a second housing, and a third housing. The cell module includes a plurality of stacked cells. The circuit board is electrically connected to the cell module. The second housing and the first housing close in to form a first cavity. The first cavity is configured to accommodate the cell module. The third housing and the second housing close in to form a second cavity. The second cavity is configured to accommodate the circuit board. Along a stacking direction of the cells, the second housing isolates the cell module from the circuit board. The cell module and the circuit board are disposed in the first cavity and the second cavity respectively. The second housing isolates the circuit board from the cells in the stacking direction of the cells.

Inventors

• Denglong HUANG

Assignees

• NINGDE AMPEREX TECHNOLOGY LIMITED

Dates

Publication Date

20260505

Application Date

20221209

Claims (18)

1. 1 . A battery, comprising: a shell comprising a first housing, a second housing, and a third housing; a cell module comprising a plurality of stacked cells; a circuit board, wherein the circuit board is electrically connected to the cell module; the second housing and the first housing close in to form a first cavity, and the first cavity is configured to accommodate the cell module; and the third housing and the second housing close in to form a second cavity, and the second cavity is configured to accommodate the circuit board; and along a stacking direction of the cells, the second housing isolates the cell module from the circuit board; wherein the battery comprises a charge-discharge port, the charge-discharge port comprises a terminal connected to the circuit board, the first housing is provided with a third cavity, the third cavity is isolated from the first cavity and communicates with the second cavity, and the terminal is accommodated in the third cavity; wherein the cell module further comprises two tabs of opposite polarities and disposed on a same side of the cells, and a first via hole and a second via hole are disposed on a sidewall of the first housing, wherein the sidewall is located on a side on which the tabs are disposed; and the battery further comprises a first connecting piece and a second connecting piece, one end of the first connecting piece is connected and fixed to the circuit board, and an other end of the first connecting piece is connected to the cell module through the first via hole; and, one end of the second connecting piece is connected and fixed to the circuit board, and an other end of the second connecting piece is connected to the cell module through the second via hole.
2. 2 . The battery according to claim 1 , wherein the isolation is non-closed isolation, the battery comprises a collecting piece located in the second cavity, one end of the collecting piece is connected to the circuit board, and the other end is connected to the cell module.
3. 3 . The battery according to claim 2 , wherein the shell further comprises a channel, and one end of the collecting piece is connected to the cell module through the channel.
4. 4 . The battery according to claim 1 , wherein the terminal comprises a first terminal and two second terminals, the first terminal is located between the two second terminals, two partition plates are disposed in the third cavity, and the partition plates are located between the first terminal and one of the two second terminals.
5. 5 . The battery according to claim 4 , wherein the battery comprises a fastener, the first housing comprises a protruding portion disposed between the two partition plates, a third via hole and a fourth via hole that fit with the protruding portion are disposed on the third housing and the circuit board respectively, and the fastener passes through the third via hole and the fourth via hole consecutively and is connected and fixed to the protruding portion.
6. 6 . The battery according to claim 4 , wherein the first terminal comprises a main body, three pin portions, and two receptacle portions; the main body is a U-shaped plate structure comprising three lateral faces; the three pin portions are disposed on the three lateral faces of the main body respectively, and are configured to connect onto the circuit board separately; and the two receptacle portions are disposed on two opposite lateral faces of the main body respectively, and extend toward each other to at least partly abut against each other.
7. 7 . The battery according to claim 1 , further comprising an adapter plate located in the first cavity; the two tabs are welded to the adapter plate separately, the first connecting piece is connected to the adapter plate through the first via hole, and the second connecting piece is connected to the adapter plate through the second via hole.
8. 8 . The battery according to claim 7 , wherein the adapter plate and the charge-discharge port are disposed on two opposite sides of the cell module.
9. 9 . The battery according to claim 7 , wherein the battery further comprises a protective piece; and a groove is provided on the adapter plate, and two ends of the protective piece are connected to two sides of the groove on the adapter plate respectively, and are serially connected on a loop of electrical connection of the first connecting piece, the two tabs, and the second connecting piece.
10. 10 . The battery according to claim 1 , wherein the first housing, the second housing, and the third housing are arranged along the stacking direction of the cells.
11. 11 . The battery according to claim 1 , wherein the housing further comprises an end cover, the end cover is located on a side of the cell module, the side on which the tabs are disposed; and the end cover forms a sleeve outside the first housing, the second housing, and the third housing.
12. 12 . The battery according to claim 1 , wherein the first housing comprises a first sidewall, the second housing comprises a second sidewall, a first fixing structure is disposed between the first sidewall and the second sidewall, and the first fixing structure comprises a guiding groove, a guiding portion, a snap buckle, and a buckle hole; the guiding portion is configured to be embedded into the guiding groove; the guiding groove is disposed on one of the first sidewall or the second sidewall, and the guiding portion is disposed on the other of the first sidewall or the second sidewall; and the snap buckle is configured to be snap-fitted in the buckle hole, the snap buckle is disposed on one of the guiding portion or a wall of the guiding groove, and the buckle hole is disposed on the other of the guiding portion or the wall of the guiding groove.
13. 13 . The battery according to claim 1 , wherein the battery comprises a pillar disposed on the second housing, the pillar protrudes from a side of the circuit board and faces the third housing; the circuit board comprises a hole structure, the pillar passes through the hole structure.
14. 14 . The battery according to claim 7 , wherein the second housing comprises a channel, the channel makes the first cavity communicate with the second cavity, the channel is close to the adapter plate located on the first side of the cell module, an end of the collecting piece and back from the circuit board extends into the first cavity through the channel, and the collecting piece is connected to the adapter plate.
15. 15 . The battery according to claim 1 , wherein third housing is connected onto the second housing, the two gaps are reserved between the third housing and the second housing on the first side of the cell module, the first connecting piece and the second connecting piece are through the gaps.
16. 16 . The battery according to claim 7 , wherein a part of the first connecting piece is disposed between the third housing and the adapter plate.
17. 17 . The battery according to claim 1 , wherein the battery comprises an insulation strip, the insulation strip is configured to cover the first connecting piece and the second connecting piece.
18. 18 . The battery according to claim 1 , the battery includes comprises a collecting piece located in the second cavity, the collecting piece is disposed between the first connecting piece and the second connecting piece.

Description

CROSS REFERENCE TO THE RELATED APPLICATIONS The present application is a continuation application of PCT application PCT/CN2020/095937, filed on 12 Jun. 2020, the disclosure of which is hereby incorporated by reference in its entirety. TECHNICAL FIELD This application relates to a battery. BACKGROUND Nowadays there is an increasing tendency to charge electric tools such as a vacuum cleaner and a garden tool by using a lithium battery. However, a space available in the tool for installing a battery is limited. Cells and a circuit board in the battery dissipate heat in a limited space and affect each other. Consequently, the operating performance of the battery is deteriorated and the battery is at risk of burning and explosion. SUMMARY In view of the foregoing, it is necessary to provide a battery to solve the foregoing problems. This application discloses a battery. The battery includes a shell, a cell module, and a circuit board. The shell includes a first housing, a second housing, and a third housing. The cell module includes a plurality of stacked cells. The circuit board is electrically connected to the cell module. The second housing and the first housing close in to form a first cavity. The first cavity is configured to accommodate the cell module. The third housing and the second housing close in to form a second cavity. The second cavity is configured to accommodate the circuit board. Along a stacking direction of the cells, the second housing isolates the cell module from the circuit board. According to some embodiments of this application, the isolation is non-closed isolation. The battery includes a collecting piece located in the second cavity. One end of the collecting piece is connected to the circuit board. The other end is connected to the cell module. According to some embodiments of this application, the shell further includes a channel One end of the collecting piece is connected to the cell module through the channel. According to some embodiments of this application, the battery includes a charge-discharge port. The charge-discharge port includes a terminal connected to the circuit board. The first housing is provided with a third cavity. The third cavity is isolated from the first cavity and communicates with the second cavity, and the terminal is accommodated in the third cavity. According to some embodiments of this application, the terminal includes a first terminal and two second terminals. The first terminal is located between the two second terminals. Two partition plates are disposed in the third cavity. The partition plates are located between the first terminal and one of the two second terminals. According to some embodiments of this application, the battery includes a fastener. The first housing includes a protruding portion disposed between the two partition plates. A third via hole and a fourth via hole that fit with the protruding portion are disposed on the third housing and the circuit board respectively. The fastener passes through the third via hole and the fourth via hole consecutively and is connected and fixed to the protruding portion. According to some embodiments of this application, the first terminal includes a main body, three pin portions, and two receptacle portions. The main body is a U-shaped plate structure includes three lateral faces. The three pin portions are disposed on the three lateral faces of the main body respectively, and are configured to connect onto the circuit board separately. The two receptacle portions are disposed on two opposite lateral faces of the main body respectively, and extend toward each other to at least partly abut against each other. According to some embodiments of this application, the cell module further includes two tabs of opposite polarities and disposed on a same side of the cells. A first via hole and a second via hole are disposed on a sidewall of the first housing, where the sidewall is located on a side on which the tabs are disposed. The battery further includes a first connecting piece and a second connecting piece. One end of the first connecting piece is connected and fixed to the circuit board. The other end is connected to the cell module through the first via hole. One end of the second connecting piece is connected and fixed to the circuit board, and the other end is connected to the cell module through the second via hole. According to some embodiments of this application, the battery further includes a adapter plate located in the first cavity. The two tabs are welded to the adapter plate separately. The first connecting piece is connected to the adapter plate through the first via hole. The second connecting piece is connected to the adapter plate through the second via hole. According to some embodiments of this application, the adapter plate and the charge-discharge port are disposed on two opposite sides of the cell module. According to some embodiments of this application, the battery further incl