CN-224217640-U - Lithium battery pack

Abstract

The utility model relates to a lithium battery pack, which comprises a battery cell support, a battery cell assembly arranged on the battery cell support and a protection circuit board arranged on the side surface of the battery cell support and used for managing charge and discharge of the battery cell assembly, wherein the battery cell assembly comprises a plurality of battery cells and a plurality of first connecting pieces connected to the positive electrode and the negative electrode of the battery cells, each first connecting piece comprises a first connecting end, the protection circuit board comprises a connecting point position corresponding to the first connecting end and a fastening piece, and the first connecting ends are locked at the connecting point position through the fastening pieces so as to enable the first connecting pieces to be conducted with the protection circuit board. The lithium battery pack designed by the utility model solves the potential adverse effect caused by soldering and improves the production efficiency of the battery pack.

Inventors

• CAI LONG
• CHEN LONG
• Ji zhongxiao
• MAO JUN
• DAI QINGMING

Assignees

• 惠州市蓝微电子有限公司

Dates

Publication Date

20260508

Application Date

20250421

Claims (9)

1. 1. The utility model provides a lithium battery package, its characterized in that, is in including electric core support, setting electric core subassembly on the electric core support and set up electric core support side be used for management electric core subassembly charge-discharge's protection circuit board, electric core subassembly includes a plurality of electric cores and connects a plurality of first connecting pieces on the positive negative pole of electric core, first connecting piece includes first link, protection circuit board include with the hookup point that first link corresponds and fastener, first link pass through the fastener lock in the hookup point location, so that first connecting piece with protection circuit board switches on mutually.
2. 2. The lithium battery pack according to claim 1, wherein the first connection end is provided with a first connection hole, the connection point location includes a second connection hole corresponding to the first connection hole, a conductive layer is laid on an inner wall of the second connection hole, the conductive layer is conductive to a circuit of the protection circuit board, and the fastener penetrates through the first connection hole and the second connection hole, so that the first connection end is in close contact with the connection point location.
3. 3. The lithium battery pack according to claim 2, wherein the connection point further comprises a conduction disc, the conduction disc is located on two surfaces of the protection circuit board in the height direction and laid on the periphery side of the second connection hole, and the conduction disc is connected with the conduction layer in a conduction manner.
4. 4. The lithium battery pack according to claim 3, wherein the first connection hole is provided with a protruding structure, and the protruding structure abuts against the conducting disc of the surface of the protection circuit board, which is close to the cell holder.
5. 5. The lithium battery pack of claim 2, wherein the fastener is a metal screw.
6. 6. The lithium battery pack according to claim 2, wherein the cell holder is provided with locking holes in one-to-one correspondence with the second connection holes, and the fastener penetrates the first connection holes and the second connection holes to be locked with the locking holes.
7. 7. The lithium battery pack according to claim 6, wherein the cell holder is provided with limit steps corresponding to the first connection ends one by one, the first connection ends are attached to the limit steps, and the locking holes are located on the limit steps.
8. 8. The lithium battery pack according to claim 1, wherein the cell holder is provided with a plurality of first positioning posts, and the protection circuit board is provided with first positioning holes corresponding to the first positioning posts one by one.
9. 9. The lithium battery pack according to claim 1, wherein the first connecting piece is provided with second positioning holes, and the cell support is provided with second positioning columns corresponding to the second positioning holes one by one.

Description

Lithium battery pack Technical Field The utility model relates to the technical field of batteries, in particular to a lithium battery pack. Background The lithium battery pack is an energy supply device consisting of one or more battery cells, the battery cells are protected and controlled by using the protection circuit board, and the lithium battery pack and the host machine body are assembled, so that the lithium battery can safely supply power for the host machine body. In the assembly process of the existing lithium battery pack, the battery core and the protection circuit board are electrically connected through the connecting sheet, soldering is carried out on the connecting point by adopting soldering iron, the general soldering temperature is about 350 ℃, potential adverse effects are easily brought to electronic components and the battery core around the soldering disc in high-temperature soldering operation, tin slag and tin beads are easily generated in the soldering process, and potential safety hazards can be buried when the tin slag or the tin beads splash into the battery pack. In addition, the production efficiency of the soldering tin welding process is low, and the automatic production is not easy to realize. Disclosure of utility model Aiming at the problems, the utility model aims to design a lithium battery pack, solve the potential adverse effect caused by soldering and improve the production efficiency of the battery pack. The aim of the utility model is achieved by the following technical scheme: the utility model provides a lithium battery package, includes the electric core support, sets up electric core subassembly on the electric core support and set up be used for managing electric core subassembly charge-discharge's protection circuit board of electric core support side, electric core subassembly includes a plurality of electric cores and connects a plurality of first connecting pieces on the positive negative pole of electric core, first connecting piece includes first link, protection circuit board include with the hookup point that first link corresponds and fastener, first link pass through the fastener lock in the hookup point position, so that first connecting piece with protection circuit board switches on mutually. The lithium battery pack designed by the scheme supports the battery cell assembly through the battery cell support, the battery cell assembly is insulated and isolated from the protection circuit board, the protection circuit board is arranged on the side face of the battery cell support, the battery cells are connected in series or in parallel through the first connecting piece, the first connecting end of the first connecting piece extends to the connecting point position of the protection circuit board, and the first connecting end is locked on the connecting point position of the protection circuit board through the fastener, so that the electric connection of the two is realized. The traditional soldering connection mode is replaced by the fastener locking connection mode, the problem that high temperature possibly occurring in the soldering connection process affects electronic components and battery cells, and tin slag or tin balls splash into a battery pack and other risks is solved, and meanwhile, the automatic locking attachment of the fastener can be realized by leading-in automatic equipment by adopting the fastener locking connection mode, so that the production efficiency is improved. Further, the first connecting end is provided with a first connecting hole, the connecting point position comprises a second connecting hole corresponding to the first connecting hole, a conducting layer is laid on the inner wall of the second connecting hole, the conducting layer is conducted with a circuit of the protection circuit board, and the fastener penetrates through the first connecting hole and the second connecting hole so that the first connecting end is clung to the connecting point position. The first connecting end is provided with a first connecting hole, the connecting point is provided with a second connecting hole corresponding to the first connecting hole, and the fastener penetrates through the first connecting hole and the second connecting hole and applies pressure to enable the connecting end face to be tightly attached to form physical locking. The inner wall of the second connecting hole is paved with a conducting layer, the conducting layer is a copper plating layer, and the structure of the conducting layer is not influenced after the fastener is disassembled, so that equipment maintenance or component replacement is facilitated, and maintenance cost can be reduced. Further, the connection point position further comprises a conduction disc, the conduction disc is located on two surfaces of the protection circuit board in the height direction and laid on the periphery side of the second connection hole, and the conduction disc is in c