CN209947909U

CN209947909U - Battery module

Info

Publication number: CN209947909U
Application number: CN201920932816.6U
Authority: CN
Inventors: 胡恺鹏; 徐博豪; 李玉杰; 韩海滨; 刘安龙
Original assignee: Guangzhou Xiaopeng Motors Technology Co Ltd
Current assignee: Guangzhou Xiaopeng Motors Technology Co Ltd
Priority date: 2019-06-20
Filing date: 2019-06-20
Publication date: 2020-01-14
Anticipated expiration: 2029-06-20

Abstract

The utility model discloses a battery module, including liquid cold plate and two electric core modules, the liquid cold plate is located between the electric core module. The battery cell module comprises at least one battery cell unit, the battery cell unit comprises a battery cell, a heat dissipation aluminum sheet in contact with the battery cell and a plastic frame for accommodating the battery cell and the heat dissipation aluminum sheet, and the heat dissipation aluminum sheet is in contact with the liquid cooling sheet. The utility model discloses an optimize position relation and relation of connection between liquid cooling board and the electric core module to realize high-efficient heat exchange and improve space utilization to electric core module.

Description

Battery module

Technical Field

The utility model relates to an electric automobile technical field especially relates to a battery module.

Background

Under the large background of a series of policies and technical development progress, such as a policy of subsidizing new energy automobiles, free new energy automobile licensing in limited-purchase cities of automobiles, continuously improved energy density of lithium ion power batteries, continuously improved technical maturity, more and more convenient charging and the like, the electric automobile obtains a mass of unsophisticated market sales, and meanwhile, common people also more and more approve the electric automobile.

Along with the development of electric automobile technique, electric automobile's important spare part laminate polymer core, its structural design presents more problem, and the current mainstream design of laminate polymer core is plastics frame, electric core and liquid cooling board alternate arrangement, adopts electric core and liquid cooling board direct contact heat dissipation, carry out the power transmission through connecing unloading structure interconnect between the plastics frame, and the last lid forms the module with the welding of metal curb plate about adopting the metal, and this scheme is a lot of spare part in groups, if probably have a plurality of liquid cooling boards, space utilization and energy density are lower relatively. Therefore, how to optimize the design of the soft package cell is a topic which is in front of the eye and needs to be improved urgently.

SUMMERY OF THE UTILITY MODEL

The utility model provides a battery module has overcome above-mentioned problem or has solved above-mentioned problem at least partially.

In order to solve the problem, the utility model provides a battery module, it includes liquid cooling board and two electric core modules, the liquid cooling board is located between the electric core module, electric core module includes at least one electric core unit, electric core unit includes electric core, with the heat dissipation aluminum sheet of electric core contact and accept the plastics frame of electric core and heat dissipation aluminum sheet, heat dissipation aluminum sheet and the contact of liquid cooling board.

Preferably, the battery cell unit comprises two battery cells, the two battery cells are vertically and symmetrically accommodated in the plastic frame, and the heat dissipation aluminum sheet is located between the two battery cells and is respectively contacted with the two battery cells.

Preferably, the battery cell module comprises at least two stacked battery cell units, wherein in two adjacent battery cell units, the plastic frame of one battery cell unit is provided with a positioning rib, and the plastic frame of the other battery cell unit is provided with a positioning groove matched with the positioning rib.

Preferably, the battery cell module further comprises a fixing piece for fixing the battery cell on the plastic frame. Preferably, the joint of the fixing piece and the plastic frame is fixed by structural adhesive.

Preferably, the battery module further comprises an aluminum bar assembled on the end part of the plastic frame, a buckle is arranged on the side part of the end part of the plastic frame, and a buckle position is arranged at the position, corresponding to the buckle, of the aluminum bar.

Preferably, the battery module further comprises a sampling wire harness, the end of the wire harness is provided with a sheet type connector, and the aluminum bar is provided with a single wire socket corresponding to the sheet type connector.

Preferably, the battery module further comprises a protective cover assembled on the aluminum row, the surface of the aluminum row is provided with a first attaching portion, and the first attaching portion is connected with the protective cover through structural adhesive.

Preferably, the battery module is still including assembling the plastics end plate on the visor, the visor is equipped with second laminating portion in its surface department, second laminating portion is glued through the structure and is connected with the plastics end plate.

Preferably, the battery module further comprises a metal cover body, the metal cover body is used for accommodating the battery cell module provided with the aluminum row, the protective cover and the plastic end plate, and the battery cell module and the plastic end plate are connected with the metal cover body through structural adhesive.

The utility model discloses an optimize position relation and relation of connection between liquid cooling board and the electric core module to realize high-efficient heat exchange and improve space utilization to electric core module. Additionally, the utility model discloses still glue, non-metallic material's mode in order to reach the demand that satisfies structural strength and improve energy density through using the structure on a large scale. Therefore, the utility model discloses an adopt optimal design to the battery module, solved in the past conventional scheme spare part more, space utilization and energy density problem lower relatively, the security is poor.

Drawings

Fig. 1 is a schematic view of a battery module according to the present invention;

fig. 2 is an exploded view of a battery module according to the present invention;

fig. 3 is an exploded view of a cell module according to the present invention;

fig. 4 is a schematic diagram illustrating an assembly of the battery cell module and the liquid cooling plate according to the present invention;

fig. 5 is an assembly diagram of a partial structure of a battery module according to the present invention;

fig. 6 is an assembly diagram of a sampling wire harness according to the present invention;

fig. 7 is an assembly diagram of the metal cover of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The utility model discloses a battery module 100, in this embodiment, as shown in fig. 1 and fig. 2, this battery module 100 includes metal cover 1, aluminium row 2, visor 3, plastics end plate 4, liquid cooling plate 5, electricity core module 6 and sampling pencil 7.

Specifically, battery module 100 includes two at least electric core modules 6, and this embodiment shows two electric core modules 6, liquid cooling plate 5 is located between two electric core modules 6, electric core module 6 adopts the structure to glue with liquid cooling plate 5 contact department and connects. The structure is glued for the heat conduction structure, has firm adhesion and good heat conduction effect, can be quick conduction to the external world of the heat that electric core module 6 produced at the operation in-process. In another embodiment, the battery module may include three battery cell modules and two liquid-cooled plates, and one liquid-cooled plate is clamped between two adjacent battery cell modules. Similarly, in other embodiments, the battery module may include four battery cell modules and three liquid-cooled plates, and may also include five battery cell modules and four liquid-cooled plates, which are not described in detail.

Referring to fig. 3, further, the battery cell module 6 includes a plurality of battery cell units 61, where each of the battery cell units 61 includes a battery cell 611, a heat dissipation aluminum sheet 615 contacting the battery cell 611, a plastic frame 613 for accommodating the battery cell 611 and the heat dissipation aluminum sheet 615, and a fixing piece 612 for fixing the battery cell 611 on the plastic frame 613. The heat dissipation aluminum sheet 615 is in contact with the liquid cooling plate 5 for heat dissipation, the fixing sheet 612 and the plastic frame 613 are fixed at a joint by using a structural adhesive, and the side edge of the battery cell 611 is connected with the plastic frame 613 by using a structural adhesive. In an embodiment, the battery cell 611 may further be coated with a novel woven fabric material such as aramid fiber to prevent thermal runaway of the battery cell 611 or the battery cell module 6.

Further, in one of the cell units 61, the cell 611 includes a first cell 6111 and a second cell 6112, the heat dissipation aluminum sheet 615 includes a first heat dissipation aluminum sheet 6151, the fixing sheet 612 is made of an aluminum material and includes a first fixing sheet 6121 and a second fixing sheet 6122, and the plastic frame 613 includes a first plastic frame 6131. The first cell 6111 and the second cell 6112 are accommodated in the first plastic frame 6131 in a vertically symmetrical manner; the first heat dissipation aluminum sheet 6151 is inserted into the first accommodating slot 614 formed in the first plastic frame 6131, and the first heat dissipation aluminum sheet 6151 is located between the first battery cell 6111 and the second battery cell 6112 and is respectively in contact with the two battery cells; the first fixing plate 6121 and the second fixing plate 6122 fix the first cell 6111 and the second cell 6112 in the first plastic frame 6131, respectively. Referring to fig. 4, in this embodiment, each cell module 6 includes 4 cell units, and is sequentially bonded and stacked up and down. Cushioning (not shown) is also placed between each cell unit to satisfy the expansion of the cell during the whole life cycle. In one embodiment, the gluing structure between each cell unit can be replaced by a buckle connection form. In another embodiment, the number of the cell units in the cell module 6 may be adjusted to change the number of the cells accommodated in the battery module 100, so as to change the overall voltage and capacity of the battery module 100.

Further, in two adjacent cell units 61, the plastic frame 613 of one cell unit 61 is provided with a positioning rib 616, and the plastic frame 613 of the other cell unit 61 is provided with a positioning groove 617 matched with the positioning rib 616. The joint of the positioning groove 617 and the positioning rib 616 is fixed by structural adhesive. The single battery cell module 6 adopts a plurality of groups of positioning ribs 616 and positioning grooves 617 to assemble the battery cell units 61.

Referring to fig. 4 again, in the embodiment, the liquid cooling plate 5 is clamped between the two battery cell modules 6, the battery cell modules 6 are connected to the liquid cooling plate 5 by using structural adhesive, and heat exchange is performed between the battery cell modules 6 and the liquid cooling plate 5 and the heat dissipation aluminum sheet in the battery cell unit. 6-series and 7-series high-strength aluminum can be adopted as the liquid cooling plate 5.

Referring to fig. 5, in the embodiment, after the battery cell module 6 and the liquid cooling plate 5 are assembled, two aluminum bars 2 are provided, and the two aluminum bars are assembled corresponding to two end portions of the battery cell module 6 respectively. The aluminum row comprises an aluminum row body 21 and an aluminum row support plate 22, a buckle 618 is arranged on the side position of the end portion of the plastic frame 613, a buckle position 23 is arranged at the position, corresponding to the buckle 618, of the aluminum row support plate 22, and the contact position of the end portion of the plastic frame 613 and the aluminum row support plate 22 is connected through structural adhesive. Referring to fig. 6, the battery cell 611 includes an electrical chip (not labeled), the aluminum bar 2 has a welding opening 20 corresponding to the electrical chip, and a contact portion between the electrical chip and the welding opening 20 is welded by laser to be fixed. And after the aluminum bar 2 is installed, continuously installing a wiring harness end part 7, wherein the wiring harness end part 7 is provided with a sheet type connector 71, and the aluminum bar 2 is provided with a single wire socket 24 corresponding to the sheet type connector 71.

Referring to fig. 5 again, two protective covers 3 respectively disposed on the aluminum rows 2 are continuously assembled, each aluminum row 2 is provided with a first attaching portion 25 on the surface thereof, and the first attaching portion 25 is connected to the protective covers 3 through a structural adhesive.

Referring to fig. 5, the battery cell module 6 further includes two plastic end plates 4 respectively assembled on the protective cover 3, the protective cover 3 is provided with a second attaching portion 31 on the surface thereof, and the second attaching portion 31 is connected to the plastic end plates 4 through structural adhesive. The plastic end plate 4 is further provided with a leading-out bracket 41 and a leading-out cover 42, wherein the leading-out bracket 41 is used for electric connection between modules, and the leading-out cover 42 is used for realizing power leading-out of the modules so as to prevent finger touch. In one embodiment, the protective cover 3 and the plastic end plate 4 may be integrally injection molded. The plastic end plate 4 can adopt 6 series and 7 series high-strength aluminum.

Referring to fig. 7, the metal cover 1 includes a metal upper cover 11 and a metal lower cover 12, and the metal upper cover 11 and the metal lower cover 12 are vertically embedded and used for accommodating the cell module 6 assembled with the aluminum row 2, the protective cover 3 and the plastic end plate 4. Cell module 6 is equipped with third laminating portion 620 and fourth laminating portion 621 respectively on upper portion and lateral part, plastics end plate 4 is equipped with fifth laminating portion 43 at its lateral part, third laminating portion 620, fourth laminating portion 621 and fifth laminating portion 43 are glued through the structure and are connected with metal cover 1. In addition, the metal cover body 1 can be replaced by mica sheets or asbestos meshes, so that the module thermal runaway can be prevented. In an embodiment, by adjusting the size and number of the glue grooves (not labeled) formed in the fourth bonding portion 621, the overall bonding strength between the battery core module 6 and the battery module 100 can be changed, so as to optimize the mechanical performance and the vibration resistance of the battery module 100, and simplify the amount of structural glue and the process steps, thereby saving the cost.

The above detailed description of the embodiments of the present invention is only exemplary, and the present invention is not limited to the above described embodiments. It will be apparent to those skilled in the art that any equivalent modifications or substitutions can be made to the present invention without departing from the spirit and scope of the invention, and therefore, all equivalent changes, modifications, improvements, etc. made without departing from the spirit and scope of the invention are intended to be covered by the scope of the invention.

Claims

1. The utility model provides a battery module, its characterized in that includes liquid cooling board and two electric core modules, the liquid cooling board is located between the electric core module, electric core module includes at least one electric core unit, electric core unit include electric core, with the heat dissipation aluminum sheet of electric core contact and accept the plastic frame of electric core and heat dissipation aluminum sheet, heat dissipation aluminum sheet and the contact of liquid cooling board.

2. The battery module of claim 1, wherein the cell unit comprises two cells, the two cells are vertically and symmetrically accommodated in the plastic frame, and the heat dissipation aluminum sheet is located between the two cells and is in contact with the two cells respectively.

3. The battery module of claim 1, wherein the cell module comprises at least two stacked cell units, and in two adjacent cell units, the plastic frame of one cell unit is provided with a positioning rib, and the plastic frame of the other cell unit is provided with a positioning groove matched with the positioning rib.

4. The battery module of claim 1, wherein the cell module further comprises a fixing plate for fixing the cell to the plastic frame.

5. The battery module as set forth in claim 4, wherein the joint of the fixing plate and the plastic frame is fixed by structural adhesive.

6. The battery module as set forth in claim 1, further comprising aluminum bars assembled on the ends of the plastic frame, wherein the plastic frame is provided with buckles at the side portions of the ends, and the aluminum bars are provided with buckling positions corresponding to the buckles.

7. The battery module according to claim 6, further comprising a sampling harness, wherein a sheet connector is arranged at the end of the harness, and a single wire socket is arranged on the aluminum bar corresponding to the sheet connector.

8. The battery module as recited in claim 6, further comprising a protective cover assembled on the aluminum row, wherein the aluminum row is provided at a surface thereof with a first attaching portion, and the first attaching portion is connected to the protective cover by a structural adhesive.

9. The battery module as recited in claim 8, further comprising plastic end plates mounted on the protective cover, wherein the protective cover is provided at a surface thereof with a second engaging portion, and the second engaging portion is connected to the plastic end plates by a structural adhesive.

10. The battery module of claim 9, further comprising a metal cover configured to receive a cell module with an aluminum row, a protective cover, and a plastic end plate, wherein the cell module and the plastic end plate are connected to the metal cover through a structural adhesive.