CN219677463U

CN219677463U - Battery module

Info

Publication number: CN219677463U
Application number: CN202321195609.XU
Authority: CN
Inventors: 郭好猛; 徐爱华; 陈涛; 郭耀辉; 王艺; 赵威威; 凌雪明; 翁蒙旗; 许少杰; 孙智超; 刘建国
Original assignee: Phylion Battery Co Ltd
Current assignee: Phylion Battery Co Ltd
Priority date: 2023-05-17
Filing date: 2023-05-17
Publication date: 2023-09-12
Anticipated expiration: 2033-05-17

Abstract

The utility model discloses a battery module which comprises a box body, an integrated acquisition device and a plurality of battery cells. The box includes first end plate, second end plate, first curb plate, second curb plate, bottom plate and apron. The first end plate, the second end plate, the first side plate, the second side plate and the bottom plate enclose a containing cavity for placing a plurality of electric cores. The cover plate is used for closing the accommodating cavity. The integrated collection system is arranged on one side of the first side plate, which faces the plurality of battery cells, and comprises an FPC board and a plurality of nickel sheets, one end of each nickel sheet is connected with the battery cells, and the other end of each nickel sheet is connected with the FPC board and is used for collecting voltage data of the battery cells. Through locating integrated collection system in the first side board of box, reduce its shared space, in the curb plate was located along first direction extension to the FPC board, the one end along the nickel piece was connected with the FPC board, and the other end is direct to be connected with the electric core, and the nickel piece need not extra occupation space size, has improved battery module's space utilization for the compatibility of module is better, and the energy density is higher.

Description

Battery module

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery module.

Background

The battery module is the most important component in the power battery pack, and the battery module is composed of a plurality of electric cells. In the battery module, a plurality of battery cells are arranged side by side to form a battery pack; the electrode lugs are led out from the end parts of the electric cores and welded with the series-parallel connection sheets, so that the electrode lugs of two adjacent electric cores are connected together, and the signal acquisition is carried out on the battery pack through the sampling module. Sampling module samples generally adopts the FPC scheme, and FPC board (Flexible Printed Circuit, chinese name are flexible circuit board) and busbar generally are through nickel piece transfer welding, but among the prior art, the holistic space utilization of battery module is influenced to nickel piece is big, and when changing new FPC board, need demolish nickel piece and busbar's welded part first, rewelding again, the unable laminating of welded part of nickel piece and busbar or uneven problem have appeared easily, have increased the change degree of difficulty of FPC board.

Disclosure of Invention

In order to overcome the above disadvantages, the present utility model is directed to a battery module, so as to solve the problems of low space utilization and difficult replacement of FPC board caused by the large space occupied by the nickel sheet in the above background art.

In order to achieve the above purpose, the technical scheme adopted by the utility model is a battery module, which comprises a box body, an integrated acquisition device and a plurality of battery cells. The box includes first end plate and the second end plate that set up along first direction interval, first curb plate and the second curb plate, bottom plate and the apron that set up along the second direction interval. The first end plate, the second end plate, the first side plate, the second side plate and the bottom plate enclose a containing cavity for placing a plurality of electric cores. The cover plate is used for closing the accommodating cavity.

The integrated collection system is arranged on one side of the first side plate, which faces the plurality of battery cells, and comprises an FPC board and a plurality of nickel plates, wherein the FPC board extends along the first direction, one end of each nickel plate along the third direction is connected with the battery cells, the other end of each nickel plate is connected with the FPC board, and the integrated collection system is used for collecting voltage data of the battery cells, and the first direction, the second direction and the third direction are mutually perpendicular.

According to the battery module provided by the utility model, the plurality of battery cells are arranged in the accommodating cavity surrounded by the first end plate, the second end plate, the first side plate, the second side plate and the bottom plate, the integrated acquisition device is arranged in the first side plate of the box body, the occupied space is reduced, the FPC plate is arranged in the side plate in an extending manner along the first direction, one end of the nickel sheet along the third direction is connected with the FPC plate, the other end of the nickel sheet is directly connected with the battery cells, the nickel sheet does not need to occupy extra space, the space utilization rate of the battery module is improved, the compatibility of the module is better, and the energy density is higher.

In some embodiments, each cell extends along the second direction, one end is provided with a positive electrode tab, the other end is provided with a negative electrode tab, and the nickel sheet is arranged below the positive electrode tab and the negative electrode tab along the third direction. The plurality of battery cells are sequentially arranged along the first direction, and the directions of positive electrode lugs of every two adjacent battery cells are opposite.

By adopting the technical scheme, one end of each battery cell along the second direction is provided with the positive electrode lug, the other end is provided with the negative electrode lug, and the directions of the positive electrode lugs of each adjacent battery cells are opposite, so that a plurality of battery cells can be connected in series.

In some embodiments, the first side plate is provided with a plurality of first through holes corresponding to the positions of the positive electrode tab and the negative electrode tab at intervals along the first direction, and the second side plate is provided with a plurality of second through holes corresponding to the positions of the positive electrode tab and the negative electrode tab at intervals along the first direction. Grooves are formed in each first through hole and each second through hole along the third direction.

By adopting the technical scheme, the first through hole corresponding to the lug position is arranged in the first side plate, the second through hole corresponding to the lug position is arranged in the second side plate, and grooves are formed in the first through hole and the second through hole and are used for being clamped and fixed with the conductive bars.

In some embodiments, the battery module further includes a plurality of conductive bars. And the first through hole and the second through hole are respectively internally provided with a conductive bar, and the conductive bars are fixedly clamped with the grooves. And welding holes corresponding to the positive electrode lugs and the negative electrode lugs are formed in each conducting bar, and the positive electrode lugs and the negative electrode lugs penetrate through the welding holes and are welded with the welding holes.

By adopting the technical scheme, the first through hole and the second through hole are respectively internally provided with the conductive bars, and the conductive bars are connected with the positive electrode lugs and the negative electrode lugs of the adjacent battery cells, so that a plurality of battery cells are connected in series to form a whole. And welding holes are formed in the conductive bars, and the conductive bars, the positive electrode lugs and the negative electrode lugs are welded and fixed through the welding holes.

In some embodiments, the battery cell includes an information collection region disposed below the positive electrode tab along a third direction, and the nickel sheet is welded to the information collection region.

By adopting the technical scheme, the nickel sheet is welded in the information acquisition area, and the battery cell is connected with the FPC board, so that voltage data of the battery cell are acquired.

In some embodiments, the battery module further includes a positive tab lead and a negative tab lead. The first through holes at the two ends of the first side plate along the first direction are respectively provided with a clamping groove for clamping one end of the positive electrode tab leading-out piece and one end of the negative electrode tab leading-out piece along the first direction, the other end of the positive electrode tab leading-out piece is fixedly connected with the first end plate, and the other end of the negative electrode tab leading-out piece is fixedly connected with the second end plate.

By adopting the technical scheme, one ends of the positive electrode tab leading-out piece and the negative electrode tab leading-out piece are fixedly clamped with the first side plate through the clamping grooves, so that the positive electrode tab leading-out piece and the negative electrode tab leading-out piece are abutted with the conductive bars in the first through holes to be in electrical contact. The other ends of the positive electrode tab leading-out piece and the negative electrode tab leading-out piece are fixedly connected with the first end plate and the second end plate respectively.

In some embodiments, a plurality of third through holes and convex parts are respectively arranged in the first end plate and the second end plate, the third through holes extend along a third direction, and the convex parts are respectively arranged on one sides of the first end plate and the second end plate, which are close to the first side plate, along a second direction and are used for bearing and fixing the positive electrode tab drawing piece and the negative electrode tab drawing piece.

By adopting the technical scheme, the weight of the end plate and the battery module is reduced through the plurality of third through holes in the first end plate and the second end plate. And the first end plate and the second end plate are respectively provided with a convex part corresponding to the positions of the positive electrode lug leading-out piece and the negative electrode lug leading-out piece at one side close to the first side plate, and the lug leading-out pieces at two ends are borne and fixed through the convex parts.

In some embodiments, the battery module further includes a plurality of spacer plates. And a spacing plate is arranged between every two adjacent electric cores, extends along the second direction and is fixedly abutted with the first side plate and the second side plate.

By adopting the technical scheme, the space plate divides the accommodating cavity into small cavities matched with the battery cell in size, so that the battery cell is fixedly placed, and the battery cell is divided and protected. The partition plate can also block the thermal runaway from the runaway single cell to the surrounding cells, and reduce the damage of the battery module.

In some embodiments, the battery module further includes a strapping tape. The packing belt is arranged around the first end plate, the first side plate, the second end plate and the second side plate in sequence and is used for packing and clamping the battery module.

By adopting the technical scheme, the first end plate, the first side plate, the second end plate and the second side plate are fixed through the packing belt, so that the stability of the box body in the transmission process and the assembly process is ensured.

Drawings

Fig. 1 is a perspective view of an embodiment of a battery module according to the present utility model;

fig. 2 is a schematic view illustrating a portion of a battery module according to an embodiment of the present utility model;

fig. 3 is a perspective view of a battery cell according to an embodiment of the present utility model, wherein (a) of fig. 3 and (b) of fig. 3 are perspective views of the battery cell at different viewing angles;

in the figure:

10-a first end plate; 11-a second end plate; 12-a first side panel; 120-a first through hole; 121-a third through hole; 13-a second side plate; 130-a second through hole; 14-a bottom plate; 15-cover plate; 16-a receiving cavity; 17-grooves; 18-clamping grooves; 19-a protrusion;

2-an integrated acquisition device; 20-FPC board; 21-nickel flakes;

3-an electric core; 30-positive electrode lugs; 31-a negative electrode tab; 32-an information acquisition area;

4-conducting bars; 40-welding holes;

50-a positive electrode tab lead-out member; 51-a negative electrode tab lead; 52-connecting wires;

6-a partition plate;

7-packing belt;

Detailed Description

The preferred embodiments of the present utility model will be described in detail below with reference to the accompanying drawings so that the advantages and features of the present utility model can be more easily understood by those skilled in the art, thereby making clear and defining the scope of the present utility model.

For convenience of the following description, before describing a specific structure of the battery module, the present utility model defines a first direction (X), a second direction (Y), and a third direction (Z) with reference to fig. 1. The first direction is a length direction, such as an X direction, of the battery module when the battery module is normally placed; the third direction is a width direction, for example, a Y direction, of the battery module when the battery module is normally placed; the second direction is the direction of the height of the battery module when the battery module is normally placed, for example, the Z direction. In the present utility model, the first direction (X), the second direction (Y) and the third direction (Z) are perpendicular to each other. It is understood that the perpendicularity of the present utility model is not absolute, and that approximate perpendicularity due to machining errors and assembly errors (e.g., an angle of 89.9 ° between two structural features) is also within the scope of the perpendicularity of the present utility model.

Referring to fig. 1 and 2, fig. 1 is a perspective view illustrating a battery module according to an embodiment of the present utility model; fig. 2 is a schematic view showing a part of the structure of a battery module according to an embodiment of the present utility model.

In some embodiments, referring to fig. 1 and 2, the present utility model employs providing a battery module including a case, an integrated acquisition device 2, and a plurality of battery cells 3. The case includes first and second end plates 10 and 11 disposed at intervals in a first direction, first and second side plates 12 and 13 disposed at intervals in a second direction, a bottom plate 14, and a cover plate 15. The first end plate 10, the second end plate 11, the first side plate 12, the second side plate 13 and the bottom plate 14 enclose a receiving cavity 16 for placing a plurality of electric cells 3. The cover plate 15 serves to close the accommodation chamber 16.

The integrated collection system 2 is located first side board 12 and is faced a plurality of electric core 3 one side, and integrated collection system 2 includes FPC board 20 and a plurality of nickel piece 21, and FPC board 20 extends along first direction, and the one end and the electric core 3 of every nickel piece 21 along the third direction are connected, and the other end is connected with FPC board 20 for gather the voltage data of electric core 3, first direction, second direction and third direction mutually perpendicular.

According to the battery module provided by the utility model, the plurality of battery cells 3 are arranged in the accommodating cavity 16 surrounded by the first end plate 10, the second end plate 11, the first side plate 12, the second side plate 13 and the bottom plate 14, the space occupied by the integrated acquisition device 2 is reduced by arranging the integrated acquisition device in the first side plate 12 of the box body, the FPC board 20 is arranged in the side plate in an extending manner along the first direction, one end of the nickel sheet 21 along the third direction is connected with the FPC board 20, the other end of the nickel sheet 21 is directly connected with the battery cells 3, the additional space occupation size is not needed, the space utilization rate of the battery module is improved, the compatibility of the module is better, and the energy density is higher.

Referring to fig. 3, fig. 1 is a perspective view illustrating a battery cell 3 in a battery module according to an embodiment of the utility model.

In some embodiments, referring to fig. 3 and referring to fig. 2, each of the battery cells 3 extends along the second direction, one end is provided with a positive electrode tab 30, the other end is provided with a negative electrode tab 31, and the nickel sheet 21 is disposed below the positive electrode tab 30 and the negative electrode tab 31 along the third direction. The plurality of battery cells 3 are sequentially arranged along the first direction, and the directions of the positive electrode lugs 30 of the adjacent battery cells 3 are opposite.

Illustratively, each cell 3 is provided with a positive electrode tab 30 at one end along the second direction and a negative electrode tab 31 at the other end, and the positive electrode tabs 30 of each adjacent cell 3 are opposite in direction, so that a plurality of cells 3 can be connected in series.

In some embodiments, referring to fig. 2, the first side plate 12 is provided with a plurality of first through holes 120 corresponding to the positions of the positive electrode tab 30 and the negative electrode tab 31 at intervals along the first direction, and the second side plate 13 is provided with a plurality of second through holes 130 corresponding to the positions of the positive electrode tab 30 and the negative electrode tab 31 at intervals along the first direction. Grooves 17 are provided in each of the first through holes 120 and each of the second through holes 130 in the third direction.

Illustratively, a first through hole 120 corresponding to the tab position is disposed in the first side plate 12, a second through hole 130 corresponding to the tab position is disposed in the second side plate 13, and grooves 17 are disposed in the first through hole 120 and the second through hole 130 for clamping and fixing with the conductive strip 4.

In some embodiments, referring to fig. 2, the battery module further includes a plurality of conductive bars 4. The first through hole 120 and the second through hole 130 are respectively provided with a conductive bar 4, and the conductive bars 4 are clamped and fixed with the grooves 17. Each of the conductive bars 4 is provided with a welding hole 40 corresponding to the positive electrode tab 30 and the negative electrode tab 31, and the positive electrode tab 30 and the negative electrode tab 31 pass through the welding hole 40 and are welded with the welding hole 40.

Illustratively, the first through hole 120 and the second through hole 130 are respectively provided with a conductive bar 4, and the conductive bars 4 connect the positive electrode tab 30 and the negative electrode tab 31 of the adjacent battery cells 3, so that the plurality of battery cells 3 are connected in series to form a whole. The welding holes 40 are arranged in the conductive bars 4, and the conductive bars 4, the positive electrode lugs 30 and the negative electrode lugs 31 are welded and fixed through the welding holes 40.

In some embodiments, referring to fig. 2 and 3, the battery cell 3 includes an information collecting region 32, the information collecting region 32 is disposed below the positive electrode tab 30 along the third direction, and the nickel sheet 21 is welded to the information collecting region 32.

Illustratively, the nickel plate 21 is welded to the information collection area 32, and connects the battery cell 3 with the FPC board 20, so as to collect voltage data of the battery cell 3.

In some embodiments, referring to fig. 2, the battery module further includes a positive tab lead 50 and a negative tab 31 lead 51. The first through holes 120 at two ends of the first side plate 12 along the first direction are respectively provided with a clamping groove 18 for clamping one end of the positive electrode tab leading-out piece 50 and one end of the negative electrode tab 31 leading-out piece 51 along the first direction, the other end of the positive electrode tab leading-out piece 50 is fixedly connected with the first end plate 10, and the other end of the negative electrode tab 31 leading-out piece 51 is fixedly connected with the second end plate 11.

Illustratively, one ends of the positive tab drawing member 50 and the negative tab 31 drawing member 51 are fastened to the first side board 12 by the fastening groove 18, so that the positive tab drawing member 50 and the negative tab 31 drawing member 51 can be in electrical contact by abutting against the conductive strip 4 in the first through hole 120, and the conductive strip 4 abutting against the tab drawing member is connected to the FPC board 20 by the connection wire 52. The other ends of the positive tab drawing member 50 and the negative tab 31 drawing member 51 are fixedly connected to the first end plate 10 and the second end plate 11, respectively.

In some embodiments, referring to fig. 1 and 2, a plurality of third through holes 121 and protrusions 19 are disposed in the first end plate 10 and the second end plate 11, the third through holes 121 extend along a third direction, and the protrusions 19 are respectively disposed on one sides of the first end plate 10 and the second end plate 11 near the first side plate 12 along a second direction, for carrying and fixing the positive tab lead-out member 50 and the negative tab 31 lead-out member 51.

By adopting the technical scheme, the weight of the end plates and the battery module is reduced through the plurality of third through holes 121 arranged in the first end plate 10 and the second end plate 11. The first end plate 10 and the second end plate 11 are provided with protrusions 19 on the sides close to the first side plate 12, the protrusions 19 corresponding to the positions of the positive tab drawing member 50 and the negative tab 31 drawing member 51, and the tab drawing members on both ends are carried and fixed by the protrusions 19.

In some embodiments, referring to fig. 2, the battery module further includes a plurality of spacer plates 6. A spacer plate 6 is arranged between each adjacent cell 3, and each spacer plate 6 extends along the second direction and is in abutting connection with the first side plate 12 and the second side plate 13.

Illustratively, the spacer plate 6 divides the receiving cavity 16 into small chambers matching the dimensions of the cells 3, thereby fixedly placing the cells 3 and providing a separation and protection for the cells 3. The partition plate 6 can also block the thermal runaway from the runaway single cells 3 to the surrounding cells 3, reducing the damage of the battery module.

In some embodiments, referring to fig. 1, the battery module further includes a packing belt 7. The packing belt 7 is sequentially arranged around the first end plate 10, the first side plate 12, the second end plate 11 and the second side plate 13 and is used for packing and clamping the battery module.

Illustratively, the top and bottom sides of the case are provided with strapping bands 7, and the first end plate 10, the first side plate 12, the second end plate 11 and the second side plate 13 are fixed by the strapping bands 7, so that the stability of the case in the transmission process and the assembly process is ensured.

The above embodiments are only for illustrating the technical concept and features of the present utility model, and are intended to enable those skilled in the art to understand the content of the present utility model and to implement the same, but are not intended to limit the scope of the present utility model, and all equivalent changes or modifications made according to the spirit of the present utility model should be included in the scope of the present utility model.

Claims

1. The battery module is characterized by comprising a box body, an integrated acquisition device and a plurality of battery cells;

the box body comprises a first end plate and a second end plate which are arranged at intervals along a first direction;

the first side plate, the second side plate, the bottom plate and the cover plate are arranged at intervals along the second direction; the first end plate, the second end plate, the first side plate, the second side plate and the bottom plate enclose a containing cavity for placing the plurality of electric cores; the cover plate is used for closing the accommodating cavity;

the integrated acquisition device is arranged on one side of the first side plate facing the plurality of battery cells, the integrated acquisition device comprises an FPC board and a plurality of nickel plates, the FPC board extends along the first direction, one end of each nickel plate along the third direction is connected with the battery cells, the other end of each nickel plate is connected with the FPC board and is used for acquiring voltage data of the battery cells, and the first direction, the second direction and the third direction are mutually perpendicular.

2. The battery module according to claim 1, wherein each of the electric cells extends in the second direction, one end of each electric cell is provided with a positive electrode tab, the other end of each electric cell is provided with a negative electrode tab, and the nickel sheet is arranged below the positive electrode tab and the negative electrode tab in the third direction; the battery cores are sequentially arranged along the first direction, and the directions of positive electrode lugs of each adjacent battery core are opposite.

3. The battery module according to claim 2, wherein the first side plate is provided with a plurality of first through holes corresponding to the positions of the positive electrode tab and the negative electrode tab at intervals along the first direction, and the second side plate is provided with a plurality of second through holes corresponding to the positions of the positive electrode tab and the negative electrode tab at intervals along the first direction; grooves are formed in each first through hole and each second through hole along a third direction.

4. The battery module of claim 3, further comprising a plurality of conductive bars; the first through hole and the second through hole are respectively internally provided with the conductive bars, and the conductive bars are fixedly clamped with the grooves; and welding holes corresponding to the positive electrode lugs and the negative electrode lugs are formed in each conducting bar, and the positive electrode lugs and the negative electrode lugs penetrate through the welding holes and are welded with the welding holes.

5. The battery module of claim 2, wherein the battery cell comprises an information acquisition region; the information acquisition area is arranged below the positive electrode lug along the third direction, and the nickel sheet is welded to the information acquisition area.

6. The battery module of claim 1, further comprising a positive tab lead and a negative tab lead; the first side plate is provided with clamping grooves in first through holes at two ends of the first side plate in the first direction, the clamping grooves are used for being clamped with the positive electrode tab leading-out piece and the negative electrode tab leading-out piece at one end of the first direction, the other end of the positive electrode tab leading-out piece is fixedly connected with the first end plate, and the other end of the negative electrode tab leading-out piece is fixedly connected with the second end plate.

7. The battery module according to claim 6, wherein a plurality of third through holes and protrusions are provided in each of the first and second end plates; the third through hole extends along the third direction, and the convex parts are respectively arranged on one side, close to the first side plate, of the first end plate and the second end plate along the second direction and are used for bearing and fixing the positive electrode tab leading-out piece and the negative electrode tab leading-out piece.

8. The battery module of claim 1, further comprising a plurality of spacer plates; and each spacing plate extends along the second direction and is abutted and fixed with the first side plate and the second side plate.

9. The battery module of claim 1, further comprising a strapping band; the packing belt is sequentially arranged around the first end plate, the first side plate, the second end plate and the second side plate in a surrounding mode and is used for packing and clamping the battery module.