CN-116569386-B - Battery assembly, battery module and manufacturing method of battery assembly

CN116569386BCN 116569386 BCN116569386 BCN 116569386BCN-116569386-B

Abstract

A battery assembly (100) comprises a circuit board (10) and a battery core (70), wherein the circuit board (10) comprises a first dielectric layer (22), a second dielectric layer (32), a film (40), a bus bar (242), a first radiating copper block (245), a fuse (342) and a second radiating copper block (345), the film (40) is arranged between the first dielectric layer (22) and the second dielectric layer (32) and is provided with a plurality of spaced cavities (45 a), the first radiating copper block (245) and the bus bar (242) are arranged on the surface of the first dielectric layer (22), the second radiating copper block (345) and the fuse (342) are arranged on the surface of the second dielectric layer (32), the circuit board (10) comprises a radiating area (I) and a bending area (II) which are continuous in sequence, the radiating area (I) and the bending area (II) are arranged to form a containing groove (60), the bus bar (242), the first copper block (245), the fuse (342) and the second copper block (345) are arranged on the surface of the first dielectric layer (22), the second radiating copper block (242) is arranged on the surface of the bus bar (242), the surface of the second dielectric layer (242) is arranged on the surface of the second dielectric layer (32), the circuit board (10) is arranged on the surface of the second dielectric layer (32), and the circuit board (10) is arranged on the surface of the bus bar (60) and is arranged on the surface of the electric bus bar (60). The application also provides a battery module (200) and a manufacturing method of the battery assembly (100).

Inventors

WU JINCHENG
ZHONG HAOWEN
LI BIAO
HUANG MEIHUA
HOU NING

Assignees

鹏鼎控股(深圳)股份有限公司
庆鼎精密电子（淮安）有限公司
鹏鼎科技股份有限公司

Dates

Publication Date: 20260512
Application Date: 20210618

Claims (10)

1. A battery assembly, comprising: A circuit board, comprising: A first dielectric layer; a second dielectric layer; a film positioned between the first dielectric layer and the second dielectric layer and having a plurality of spaced apart cavities; A busbar; The first heat dissipation copper block and the busbar are positioned on the surface of the first dielectric layer, which is away from the second dielectric layer; fuse, and The second heat dissipation copper block and the fuse are positioned on the surface of the second dielectric layer, which is away from the first dielectric layer; The circuit board comprises a heat dissipation area and a bending area which are sequentially and continuously arranged at intervals, wherein the heat dissipation area and the bending area are surrounded to form a containing groove, the bus bar, the first heat dissipation copper block, the fuse and the second heat dissipation copper block are all positioned in the heat dissipation area, the bus bar and the first heat dissipation copper block are arranged towards the containing groove, and And the battery cell is positioned in the accommodating groove and is electrically connected with the circuit board through the busbar.
2. The battery assembly of claim 1, further comprising a first thermally conductive sheet on a surface of the first dielectric layer facing the cavity and a second thermally conductive sheet on a surface of the second dielectric layer facing the cavity.
3. The battery assembly of claim 1, further comprising a monitoring element coupled to the fuse.
4. The battery assembly of claim 1, further comprising a connecting tab, wherein the buss bar is disposed in correspondence with the connecting tab in the same heat dissipation area.
5. The battery assembly of claim 1, wherein the cavity is further filled with a liquid.
6. A battery module comprising the battery assembly of any one of claims 1-4, wherein the number of battery assemblies is at least two, and wherein the second heat dissipation copper block of one battery assembly is connected to the surface of the cell of an adjacent battery assembly.
7. A method of making a battery assembly comprising the steps of: Providing a first substrate, wherein the first substrate comprises a first copper layer, a first dielectric layer and a plurality of first heat-conducting adhesives, the first dielectric layer is positioned on the surface of the first copper layer, and the plurality of first heat-conducting adhesives respectively penetrate through the first dielectric layer and are connected with the first copper layer; Providing a second substrate, wherein the second substrate comprises a second copper layer, a second dielectric layer and at least one second heat-conducting adhesive, the second dielectric layer is positioned on the surface of the second copper layer, and the second heat-conducting adhesive penetrates through the second dielectric layer and is connected with the second copper layer; providing a film, wherein the film comprises a plurality of through holes, and the positions of the through holes correspond to the positions of the first heat conducting glue; The first substrate and the second substrate are respectively pressed on two opposite sides of the film and the through holes are sealed, so that the through holes form cavities, and a heat dissipation area and a bending area which are sequentially arranged at intervals are formed; Etching the first copper layer to form a bus bar and a first heat dissipating copper block, etching the second copper layer to form a fuse and a second heat dissipating copper block to form a circuit board, and And bending the circuit board in the bending area to form a containing groove, and placing a battery cell in the containing groove, wherein the battery cell is electrically connected with the busbar, so that the battery assembly is formed.
8. The method of manufacturing a battery assembly according to claim 7, wherein the step of forming the first substrate includes: Providing a single-sided copper-clad plate, wherein the single-sided copper-clad plate comprises the first dielectric layer and the first copper layer positioned on the surface of the first dielectric layer; Removing part of the first dielectric layer and exposing the surface of the first copper layer to form a slot, and And filling the grooves with first heat-conducting glue.
9. The method of manufacturing a battery assembly according to claim 8, wherein the first substrate further comprises a first heat conductive sheet, and the step of forming the first substrate further comprises: And attaching the first heat conducting fin to the surface of the first heat conducting glue.
10. The method of claim 7, wherein the step of bending the circuit board at the bending region to form a receiving groove, and placing a battery cell in the receiving groove, the battery cell being electrically connected to the bus bar, thereby forming the battery assembly comprises: connecting a connecting sheet on the surface of the busbar; bonding colloid on the surfaces of the first heat dissipation copper block and the second heat dissipation copper block; Bending both ends of the circuit board towards one side of the connecting sheet to form the accommodating groove, and And the battery cell is accommodated in the accommodating groove and is connected with the circuit board through the connecting sheet, so that the battery assembly is formed.

Description

Battery assembly, battery module and manufacturing method of battery assembly Technical Field The application relates to the field of battery heat dissipation, in particular to a battery assembly, a battery module and a manufacturing method of the battery assembly. Background Batteries are an important source of power for some devices, such as electric automobiles. To meet the high power requirements of the device, it is often necessary to assemble a plurality of battery cells to form a large battery module. In order to ensure the safety of the high-power battery module, the battery module needs to have overcurrent protection and thermal management functions. In the existing battery module, the current of a plurality of battery cells is generally converged through a busbar, a fuse is installed to realize overcurrent protection of the battery module, and a radiating tube is additionally installed to radiate the battery module. The busbar, the fuse and the radiating tube are all independent components, and an additional space is required for accommodating the busbar, and in addition, the existing radiating tube is arranged at two ends of the battery cell, so that the radiating requirement of the battery module in high-power use cannot be met. Disclosure of Invention In view of the foregoing, it is necessary to provide a battery assembly with small arrangement space and fast heat dissipation to solve the above-mentioned technical problems. The application also provides a battery module. The application also provides a manufacturing method of the battery component. The battery assembly comprises a circuit board and a battery core, wherein the circuit board comprises a first dielectric layer, a second dielectric layer, a film, a bus bar, a first heat dissipation copper block, a fuse and a second heat dissipation copper block, the film is located between the first dielectric layer and the second dielectric layer and is provided with a plurality of spaced cavities, the first heat dissipation copper block and the bus bar are located on the surface, away from the second dielectric layer, of the first dielectric layer, the second heat dissipation copper block and the fuse are located on the surface, away from the first dielectric layer, of the second dielectric layer, the circuit board comprises a heat dissipation area and a bending area which are sequentially and alternately arranged, the heat dissipation area and the bending area are surrounded to form a containing groove, the bus bar, the first heat dissipation copper block, the fuse and the second heat dissipation copper block are located in the heat dissipation area, the bus bar and the first heat dissipation copper block are located towards the containing groove, and the battery core is located in the containing groove and is connected with the circuit board through the bus bar. In some embodiments, the battery assembly further includes a first thermally conductive sheet located on a surface of the first dielectric layer facing the cavity and a second thermally conductive sheet located on a surface of the second dielectric layer facing the cavity. In some embodiments, the battery assembly further comprises a monitoring element connected to the fuse. In some embodiments, the busbar and the connecting piece are disposed in the same heat dissipation area. In some embodiments, the cavity is also filled with a liquid. A battery module comprises at least two battery modules, wherein the second heat dissipation copper block of one battery module is connected with the surface of the battery cell of the adjacent battery module. The manufacturing method of the battery assembly comprises the steps of providing a first substrate, providing a second substrate, providing a first dielectric layer, and providing a plurality of first heat conducting adhesives, wherein the first substrate comprises a first copper layer, a first dielectric layer and a plurality of first heat conducting adhesives, the first dielectric layer is located on the surface of the first copper layer, the plurality of first heat conducting adhesives penetrate through the first dielectric layer and are connected with the first copper layer respectively, the second substrate comprises a second copper layer, a second dielectric layer and at least one second heat conducting adhesive, the second dielectric layer is located on the surface of the second copper layer, the second heat conducting adhesives penetrate through the second dielectric layer and are connected with the second copper layer, the film comprises a plurality of through holes, the positions of the through holes correspond to the positions of the first heat conducting adhesives, the first substrate and the second substrate are respectively pressed on two opposite sides of the first dielectric layer and are sealed with the through holes, so that the through holes form cavities, a heat dissipation area and a bending area are formed at intervals in s