CN220627879U - Battery module and battery pack - Google Patents

Abstract

The utility model provides a battery module and a battery pack, wherein the battery module comprises a plurality of battery cell groups which are sequentially arranged in a first direction, each battery cell group comprises a plurality of battery cells which are sequentially arranged in the first direction, each battery cell comprises positive electrode posts and negative electrode posts which are arranged at intervals in a second direction, the positive electrode posts in each battery cell group are sequentially arranged in the first direction, and the negative electrode posts in each battery cell group are sequentially arranged in the first direction; the plurality of positive electrode posts in each cell group and the plurality of negative electrode posts in the adjacent cell group are sequentially arranged in the first direction, and the plurality of negative electrode posts in each cell group and the plurality of positive electrode posts in the adjacent cell group are sequentially arranged in the first direction; the battery module and the battery pack provided by the utility model can improve the voltage, current and power of the battery module on the basis of ensuring the safety.

Description

Battery module and battery pack

Technical Field

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

Background

The power battery pack is used as one of the core components of the electric automobile, is an energy center of the electric automobile, the battery module is used as an energy distribution unit of the power battery, plays an irreplaceable role on the whole automobile, and along with the development of the power battery technology, the requirements on the voltage, the current and the power of the battery module are continuously increased.

How to improve the voltage, current and power of the battery module on the basis of ensuring the safety of the battery module is a problem to be solved by the technicians in the field.

Disclosure of Invention

The embodiment of the utility model provides a battery module and a battery pack, which can improve the voltage, current and power of the battery module on the basis of ensuring the safety of the battery module.

In a first aspect, an embodiment of the present utility model provides a battery module, where the battery module includes a plurality of battery cell groups sequentially arranged in a first direction, the battery cell groups include a plurality of battery cells sequentially arranged in the first direction, the battery cells include positive electrode posts and negative electrode posts that are disposed at intervals in a second direction, and the first direction and the second direction are perpendicular to each other, where a plurality of positive electrode posts in each battery cell group are sequentially arranged in the first direction, and a plurality of negative electrode posts in each battery cell group are sequentially arranged in the first direction; the positive electrode posts in each cell group and the negative electrode posts in the adjacent cell groups are sequentially arranged in the first direction, and the negative electrode posts in each cell group and the positive electrode posts in the adjacent cell groups are sequentially arranged in the first direction; the battery module further comprises a plurality of insulating sheets which are sequentially arranged in the first direction, wherein one electric core is arranged between two adjacent insulating sheets.

In an embodiment, the battery module further includes a battery collecting system disposed at a side of the plurality of battery cell groups facing a third direction, the third direction being perpendicular to the first direction and the second direction; wherein, the battery acquisition system includes: a bracket having two first openings and at least one second opening, the first openings having an extension in the first direction that is less than the extension of the second openings in the first direction; the bus bar comprises two first connection rows and at least one second connection row, one first connection row is correspondingly arranged in each first opening, one second connection row is correspondingly arranged in each second opening, and the extension length of the first connection row in the first direction is smaller than that of the second connection row in the first direction; one of the first connection rows is electrically connected with a plurality of positive electrode posts arranged in sequence in the first direction in one of the battery cell groups, the other one of the first connection rows is electrically connected with a plurality of negative electrode posts arranged in sequence in the first direction in the other battery cell group, and each of the second connection rows is electrically connected with a plurality of positive electrode posts and a plurality of negative electrode posts arranged in sequence in the first direction in the two adjacent battery cell groups.

In an embodiment, the bracket includes a plurality of protrusions disposed between two of the second openings adjacent in the first direction, or between the first opening and the second opening adjacent in the first direction, or between the first opening and the first opening adjacent in the first direction; the battery module further comprises a cover plate, the cover plate is arranged on one side, deviating from the plurality of battery cell groups, of the battery acquisition system, a plurality of assembly holes are formed in the cover plate, and the assembly holes are arranged corresponding to the protrusions.

In one embodiment, the battery module comprises m electric core groups sequentially arranged in the first direction, and each electric core group comprises n electric cores sequentially arranged in the first direction, wherein m is more than or equal to 6, and n is more than or equal to 3; the cover plate comprises bending ribs, and the bending ribs comprise at least one first rib extending along the first direction and at least one second rib extending along the second direction.

In an embodiment, two sides of each second rib are respectively provided with one assembly hole.

In an embodiment, the two first openings are respectively disposed at two ends of the bracket, and the busbar further includes two output copper bars, each of which is electrically connected to the first connection bar in one of the first openings; the output copper bar comprises a first part, a second part and a third part which are sequentially connected, the first part is in contact with the first connection row, the second part extends from one end of the first part along the direction of the bracket towards the battery cell, the third part extends from one end of the second part along the direction away from the battery cell group, and the third part is parallel to the first part and comprises at least one connection hole; the battery module further comprises two output electrode bases, the output electrode bases are fixedly connected with the output copper bars, and the output electrode bases comprise threaded holes which are arranged corresponding to the connecting holes.

In an embodiment, the battery module further comprises two end plates, the two end plates are respectively arranged at two ends of the plurality of battery cell groups, wherein the end plates comprise dovetail grooves, the output electrode base comprises dovetail platforms matched with the dovetail grooves, and the dovetail platforms of the output electrode base are embedded in the dovetail grooves of the end plates.

In an embodiment, the battery module further includes two side plates, the two side plates are respectively disposed on one side of the plurality of battery cell groups facing the second direction and one side of the plurality of battery cell groups facing away from the second direction, wherein the side plates include a side plate main body and two bending parts, the two bending parts are disposed at two ends of the side plate main body, and the two bending parts are respectively welded and fixed with the two end plates.

In an embodiment, the side plate further comprises an insulating hot-pressing film, and the insulating hot-pressing film covers the surface of one side of the side plate main body facing the battery cell group, two side surfaces of the side plate main body and at least part of the surface of one side of the side plate main body facing away from the battery cell group.

In a second aspect, an embodiment of the present utility model provides a battery pack including a plurality of the battery modules as set forth in any one of the above, the plurality of battery modules being sequentially arranged in a second direction.

The embodiment of the utility model has the beneficial effects that:

the utility model provides a battery module and a battery pack, wherein the battery module comprises a plurality of battery cell groups which are sequentially arranged in a first direction, each battery cell group comprises a plurality of battery cells which are sequentially arranged in the first direction, each battery cell comprises positive electrode posts and negative electrode posts which are arranged at intervals in a second direction, the first direction is perpendicular to the second direction, the plurality of positive electrode posts in each battery cell group are sequentially arranged in the first direction, and the plurality of negative electrode posts in each battery cell group are sequentially arranged in the first direction; the plurality of positive electrode posts in each cell group and the plurality of negative electrode posts in the adjacent cell group are sequentially arranged in the first direction, and the plurality of negative electrode posts in each cell group and the plurality of positive electrode posts in the adjacent cell group are sequentially arranged in the first direction; the battery module further comprises a plurality of insulating sheets which are sequentially arranged in the first direction, wherein an electric core is arranged between two adjacent insulating sheets. The battery module and the battery pack provided by the utility model can improve the voltage, current and power of the battery module on the basis of ensuring the safety of the battery module.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

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

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

fig. 3 is a schematic plan view of a plurality of battery cell groups sequentially arranged in a first direction according to an embodiment of the present utility model;

fig. 4 is a schematic perspective view of a battery acquisition system according to an embodiment of the present utility model;

FIG. 5 is a schematic perspective view of a cover plate according to an embodiment of the present utility model;

FIG. 6 is a schematic perspective view of an output electrode base according to an embodiment of the present utility model;

FIG. 7 is a schematic perspective view of an end plate according to an embodiment of the present utility model;

fig. 8 is a schematic perspective view of a side plate according to an embodiment of the present utility model;

fig. 9 is a schematic perspective view of a side plate according to another embodiment of the present utility model.

Reference numerals illustrate:

a battery module 100; a cell group 10; a cell 11; a positive electrode post 111; a negative electrode post 112; an insulating sheet 20; a battery harvesting system 30; a bracket 31; a first opening 311; a second opening 312; a protrusion 313; a bus bar 32; a first connection row 321; a second connection row 322; an output copper bar 323; a first portion 324; a second portion 325; a third portion 326; a connection hole 327; a cover plate 40; a fitting hole 41; bending the ribs 42; first rib 421; a second bead 422; an output electrode base 50; a screw hole 51; dovetail stage 52; an end plate 60; a dovetail groove 61; a lifting hole 62; a side plate 70; a side plate main body 71; a bending portion 72; an insulating hot-press film 73; an output electrode protection cover 80; a first direction X; a second direction Y; a third direction Z;

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model. Furthermore, it should be understood that the detailed description is presented herein for purposes of illustration and description only, and is not intended to limit the utility model. In the present utility model, unless otherwise indicated, terms of orientation such as "upper" and "lower" are used to generally refer to the upper and lower positions of the device in actual use or operation, and specifically the orientation of the drawing figures; while "inner" and "outer" are for the outline of the device.

Fig. 1 is an assembled exploded view of a battery module according to an embodiment of the present utility model; fig. 2 is a perspective view of a battery module according to an embodiment of the present utility model; fig. 3 is a schematic plan view of a plurality of cell groups sequentially arranged in a first direction according to an embodiment of the present utility model. Referring to fig. 1 to 3, in a first aspect, an embodiment of the present utility model provides a battery module 100, where the battery module 100 includes a plurality of battery cells 10 sequentially arranged in a first direction X, the battery cells 10 include a plurality of battery cells 11 sequentially arranged in the first direction X, the battery cells 11 include positive electrode posts 111 and negative electrode posts 112 that are disposed at intervals in a second direction Y, the first direction X is perpendicular to the second direction Y, the positive electrode posts 111 in each battery cell 10 are sequentially arranged in the first direction X, and the negative electrode posts 112 in each battery cell 10 are sequentially arranged in the first direction X, that is, the positive electrode posts 111 in each battery cell 10 are disposed on the same side, and the negative electrode posts 112 in each battery cell 10 are disposed on the same side; the plurality of positive electrode posts 111 in each of the battery cell groups 10 are sequentially arranged with the plurality of negative electrode posts 112 in the adjacent battery cell groups 10 in the first direction X, and the plurality of negative electrode posts 112 in each of the battery cell groups 10 are sequentially arranged with the plurality of positive electrode posts 111 in the adjacent battery cell groups 10 in the first direction X, that is, the plurality of positive electrode posts 111 in each of the battery cell groups 10 are disposed on the same side as the plurality of negative electrode posts 112 in the adjacent battery cell groups 10, and the plurality of negative electrode posts 112 in each of the battery cell groups 10 are disposed on the same side as the plurality of positive electrode posts 111 in the adjacent battery cell groups 10; the battery module 100 further includes a plurality of insulating sheets 20 sequentially arranged in the first direction X, wherein one of the battery cells 11 is disposed between two adjacent insulating sheets 20.

In the battery module 100 provided by the utility model, since the positive electrode posts 111 in each of the battery cell groups 10 are arranged on the same side, and the negative electrode posts 112 in each of the battery cell groups 10 are arranged on the same side, the positive electrode posts 111 in each of the battery cell groups 10 can be connected in parallel with each other through a connection row extending along the first direction X, and the negative electrode posts 112 in each of the battery cell groups 10 can be connected in parallel with each other through another connection row extending along the first direction X, so that the plurality of battery cells 11 in each of the battery cell groups 10 can be connected in parallel, and the output current of the battery module 100 is improved.

In the battery module 100 provided by the utility model, since the positive electrode posts 111 in each of the battery cell groups 10 are disposed on the same side as the negative electrode posts 112 in the adjacent battery cell groups 10, and the negative electrode posts 112 in each of the battery cell groups 10 are disposed on the same side as the positive electrode posts 111 in the adjacent battery cell groups 10, the positive electrode posts 111 in one of the battery cell groups 10 and the negative electrode posts 112 in the other battery cell group 10 adjacent to the battery cell group 10 can be connected in series with each other by a connection row extending along the first direction X; the plurality of negative electrode posts 112 in one of the battery cell groups 10 and the plurality of positive electrode posts 111 in the other of the battery cell groups 10 adjacent to the battery cell group 10 can be connected in series with each other through another connection row extending in the first direction X, so that the two adjacent battery cell groups 10 can be connected in series, and the output voltage of the battery module 100 is improved.

Since the output current and the output voltage of the battery module 100 are both increased, the output power of the battery module 100 can be increased.

Moreover, since one battery cell 11 is disposed between two adjacent insulating sheets 20, each battery cell 11 can be disposed in an independent space formed by two adjacent insulating sheets 20, so that the output current, the output voltage and the output power of the battery module 100 are improved, the battery cell 11 is ensured to stably operate, and the safety performance of the battery module 100 is improved.

Optionally, the thickness of the insulating sheet 20 is 2 to 4mm, so as to reduce the assembly length of the battery module 100 in the first direction X as much as possible while ensuring the insulating effect of the insulating sheet 20, reduce the volume, reduce the assembly difficulty, and improve the mechanical strength of the battery module 100.

Optionally, the first direction X is a length direction of the battery module 100, and the second direction Y is a width direction of the battery module 100.

Fig. 4 is a schematic perspective view of a battery acquisition system according to an embodiment of the present utility model. As shown in fig. 1 and 4, in some embodiments of the present utility model, the battery module 100 further includes a battery collection system (Cell Collection System, abbreviated as CCS) 30, and the battery collection system 30 is disposed on a side of the plurality of battery cell groups 10 facing a third direction Z, which is perpendicular to the first direction X and the second direction Y; wherein, the battery acquisition system 30 comprises: a bracket 31 and a bus bar 32, the bracket 31 having two first openings 311 and at least one second opening 312, an extension length of the first openings 311 in the first direction X being smaller than an extension length of the second openings 312 in the first direction X; the busbar 32 includes two first connection rows 321 and at least one second connection row 322, each first opening 311 is correspondingly provided with one first connection row 321, each second opening 312 is correspondingly provided with one second connection row 322, and the extension length of the first connection row 321 in the first direction X is smaller than the extension length of the second connection row 322 in the first direction X; one of the first connection rows 321 is electrically connected to a plurality of positive electrode posts 111 in one of the battery cell groups 10, which are sequentially arranged in the first direction X, the other one of the first connection rows 321 is electrically connected to a plurality of negative electrode posts 112 in another one of the battery cell groups 10, which are sequentially arranged in the first direction X, and each of the second connection rows 322 is electrically connected to a plurality of positive electrode posts 111 and a plurality of negative electrode posts 112 in two adjacent battery cell groups 10, which are sequentially arranged in the first direction X.

In the battery module 100 provided by the utility model, the plurality of positive electrode posts 111 sequentially arranged in the first direction X in the same battery cell group 10 are connected in parallel through the first connection row 321 or the second connection row 322, the plurality of negative electrode posts 112 sequentially arranged in the first direction X in the same battery cell group 10 are connected in parallel through the first connection row 321 or the second connection row 322, and the plurality of positive electrode posts 111 sequentially arranged in the first direction X and the plurality of negative electrode posts 112 in two adjacent battery cell groups 10 are connected in series through the second connection row 322, so that the number of the connection rows can be reduced through a more reasonable arrangement mode of the connection rows while the output current, the output voltage and the output power of the battery module 100 are ensured to be improved.

Optionally, the first connection row 321 and the second connection row 322 are welded and fixed with the terminal of the battery 11.

Optionally, the number of the electric cells 11 electrically connected to the second connection row 322 is twice the number of the electric cells 11 electrically connected to the first connection row 321.

Fig. 5 is a schematic perspective view of a cover plate according to an embodiment of the utility model. As shown in connection with fig. 1 and 5, in some embodiments of the present utility model, the bracket 31 includes a plurality of protrusions 313, the protrusions 313 being disposed between two of the second openings 312 adjacent in the first direction X, or between the first openings 311 and the first openings 311 adjacent in the first direction X; the battery module 100 further includes a cover plate 40, the cover plate 40 is disposed on a side of the battery collecting system 30 facing away from the plurality of battery cell groups 10, a plurality of assembly holes 41 are disposed on the cover plate 40, and the assembly holes 41 are disposed corresponding to the protrusions 313. When the protrusion 313 is disposed between two second openings 312 adjacent to each other in the first direction X or between the first opening 311 and the second opening 312 adjacent to each other in the first direction X, the battery module 100 includes three or more battery cells 10 sequentially arranged in the first direction X; when the protrusion 313 is disposed between the first openings 311 adjacent to each other in the first direction X and the first openings 311, the battery module 100 includes only two battery cell groups 10 sequentially arranged in the first direction X.

In the battery module 100 provided by the utility model, the battery collection system 30 can be connected with the assembly hole 41 on the cover plate 40 through the protrusion 313 on the bracket 31, so that the assembly stability of the cover plate 40 and the battery collection system 30 is improved.

Alternatively, the bracket 31 includes two rows of openings sequentially arranged in the second direction Y, wherein one row of openings includes a plurality of second openings 312, and the other row of openings includes two first openings 311 and a plurality of second openings 312.

Optionally, the protrusion 313 is interference fit with the assembly hole 41 to further improve the assembly stability of the cover 40 and the battery collection system 30.

Optionally, the protrusion 313 is a plastic rivet.

Optionally, the cover 40 is made of an insulating material, such as plastic. The cover 40 has a thickness in the third direction Z of 0.2-0.8mm.

In some embodiments of the present utility model, the battery module 100 includes m cell groups 10 sequentially arranged in the first direction X, each cell group 10 includes n cells 11 sequentially arranged in the first direction X, wherein m is greater than or equal to 6, n is greater than or equal to 3; wherein, the cover 40 includes a bending rib 42, and the bending rib 42 includes at least one first rib 421 extending along the first direction X and at least one second rib 422 extending along the second direction Y.

In the battery module 100 provided by the utility model, since the battery module 100 includes m battery cell groups 10 sequentially arranged in the first direction X, each battery cell group 10 includes n battery cells 11 sequentially arranged in the first direction X, where m is greater than or equal to 6 and n is greater than or equal to 3, and therefore, the battery module 100 includes more than 18 battery cells 11 sequentially arranged in the first direction X, which can greatly improve the output current, the output voltage and the output power of the battery module 100.

In addition, since the battery module 100 includes a plurality of the battery cells 11 sequentially arranged in the first direction X, the battery module 100 is easily protruded or recessed in the first direction X and the second direction Y, and in order to avoid the above, the present utility model combines the first rib 421 and the second rib 422 extending in the first direction X to form the integral bent rib 42 by providing the first rib 421 and the second rib 422 extending in the second direction Y, thereby greatly improving the supporting strength of the battery module 100 by the cover plate 40 and improving the mechanical strength of the battery module 100.

In some embodiments of the present utility model, each of the second ribs 422 is provided with one of the assembly holes 41 on each side.

In the battery module 100 provided by the utility model, since the two sides of each second rib 422 are respectively provided with one assembly hole 41, the bending ribs 42 can form a bending structure, and meanwhile, the assembly holes 41 are avoided, and the problem of reduced supporting performance of the bending ribs 42 caused by the arrangement of the assembly holes 41 on the bending ribs 42 is avoided.

Fig. 6 is a schematic perspective view of an output electrode base according to an embodiment of the utility model. As shown in fig. 1 and fig. 6, in some embodiments of the present utility model, two first openings 311 are respectively disposed at two ends of the bracket 31, and the busbar 32 further includes two output copper bars 323, where each output copper bar 323 is electrically connected to the first connection bar 321 in one of the first openings 311; the output copper bar 323 includes a first portion 324, a second portion 325, and a third portion 326 that are sequentially connected, where the first portion 324 contacts the first connection row 321, the second portion 325 extends from one end of the first portion 324 along the direction of the bracket 31 toward the battery cell 11, the third portion 326 extends from one end of the second portion 325 along a direction away from the battery cell group 10, and the third portion 326 is parallel to the first portion 324, and the third portion 326 includes at least one connection hole 327; the battery module 100 further includes two output electrode bases 50, the output electrode bases 50 are fixedly connected with the output copper bars 323, and the output electrode bases 50 include threaded holes 51 corresponding to the connection holes 327.

In the battery module 100 provided by the utility model, the two first openings 311 are respectively disposed at two ends of the bracket 31, so that the first connection rows 321 correspondingly disposed in the two first openings 311 are respectively electrically connected with the two output copper bars 323.

Moreover, since the first portion 324 is in contact with the first connection row 321, the second portion 325 extends from one end of the first portion 324 along the direction of the bracket 31 toward the battery cell 11, the third portion 326 extends from one end of the second portion 325 along the direction away from the battery cell group 10, and the third portion 326 is parallel to the first portion 324, the output copper bar 323 can utilize the space of the bracket 31 and the battery cell 11 in the third direction Z when being arranged, so that the battery module 100 can be designed to be light and thin.

In addition, since the output electrode base 50 includes the screw hole 51 corresponding to the connection hole 327, the output electrode base 50 and the output copper bar 323 can be fixedly connected by the screw penetrating the connection hole 327 and being in threaded fit with the screw hole 51, so that the assembly difficulty is reduced, and the assembly efficiency is improved.

Optionally, the bracket 31 is made of an insulating material, such as plastic, and the diameter of the connecting hole 327 is 5-7mm.

Optionally, the color of the output electrode base 50 is orange or other striking colors, so as to play a role in high-voltage danger warning and protect personnel safety.

Fig. 7 is a schematic perspective view of an end plate according to an embodiment of the present utility model. As shown in fig. 1 and 7, in some embodiments of the present utility model, the battery module 100 further includes two end plates 60, and the two end plates 60 are disposed at two ends of the plurality of battery cells 10, respectively, wherein the end plates 60 include dovetail grooves 61, the output electrode base 50 includes dovetail stages 52 adapted to the dovetail grooves 61, and the dovetail stages 52 of the output electrode base 50 are embedded in the dovetail grooves 61 of the end plates 60.

In the battery module 100 provided by the utility model, the dovetail grooves 61 in the end plate 60 can be in clamping connection with the dovetail platforms 52 in the output electrode base 50, so that the fixation of the plurality of battery cell groups 10 in the second direction Y and the third direction Z is realized, stable assembly is realized, and meanwhile, the assembly efficiency is improved.

Optionally, the thickness of the end plate 60 in the first direction X is 15-20mm, and aerogel is filled between the end plate 60 and the insulating sheet 20, and the thickness of the aerogel in the first direction X is 0.5-2.0mm. The end plate 60 is fixedly connected with the insulating sheet 20 through the aerogel, so as to compress the plurality of cells 11 in the plurality of cell groups 10, thereby realizing the fixation of the plurality of cell groups 10 in the first direction X.

Optionally, the thickness of the insulating sheet 20 between the end plate 60 and the battery cells 11 is greater than the thickness between two adjacent battery cells 11.

Optionally, a lifting hole 62 is further formed on a side of the end plate 60 facing away from the plurality of battery cell groups 10, so as to implement lifting installation and improve assembly efficiency.

Fig. 8 is a schematic perspective view of a side plate according to an embodiment of the present utility model under one view angle, and fig. 9 is a schematic perspective view of a side plate according to an embodiment of the present utility model under another view angle. As shown in fig. 1, 8 and 9, in some embodiments of the present utility model, the battery module 100 further includes two side plates 70, and the two side plates 70 are respectively disposed on one side of the plurality of battery cell groups 10 facing the second direction Y and one side facing away from the second direction Y, wherein the side plates 70 include a side plate body 71 and two bending portions 72, the two bending portions 72 are disposed at two ends of the side plate body 71, and the two bending portions 72 are respectively welded and fixed with the two end plates 60.

In the battery module 100 provided by the utility model, the side plate 70 can protect the side edges of the plurality of battery cell groups 10, so as to improve the working stability of the battery cells 11. The provision of the bent portion 72 can improve the coating property of the side plate 70 on the plurality of cell groups 10 and facilitate the fixed connection between the side plate 70 and the end plate 60.

Optionally, the thickness of the side plate 70 is 1.0-2.0mm, and the material is aluminum or aluminum alloy.

In some embodiments of the present utility model, the side plate 70 further includes an insulating thermo-compression film 73, and the insulating thermo-compression film 73 covers a surface of the side plate body 71 facing a side of the cell group 10, both sides of the side plate body 71, and at least a partial surface of a side of the side plate body 71 facing away from the cell group 10.

In the battery module 100 provided by the utility model, the insulating hot-pressing film 73 covers the surface of the side plate main body 71 facing the side of the battery cell group 10, the two side surfaces of the side plate main body 71 and at least part of the surface of the side plate main body 71 facing away from the side of the battery cell group 10, so that the side plate main body 71 can be prevented from contacting the battery cell 11. Alternatively, the side plates 70 are metal plates, and the insulating hot-pressing film 73 covers both side surfaces of the side plate body 71, so that the problem of reduced safety performance of the battery module 100 caused by the burrs on the side surfaces of the side plate body 71 contacting the battery cells 11 can be avoided.

Optionally, the width of the bending portion 72 in the third direction Z is smaller than the width of the side plate main body 71 in the third direction Z, and the side edge of the end plate 60 is wrapped, so as to reduce the bending difficulty of the bending portion 72, improve the structural adaptation of the bending portion 72 and the end plate 60, and enhance the connection stability. Illustratively, the width of the bending portion 72 in the third direction Z is 50-70mm, so as to ensure the welding length between the bending portion 72 and the end plate 60, improve the assembly stability, and improve the safety problem caused by the expansion of the battery cell 11 during use. Optionally, a weld shear force between the bend 72 and the end plate 60 is greater than or equal to 200N/mm.

In some embodiments of the present utility model, the battery module 100 further includes an output electrode protection cover 80, and the output electrode protection cover 80 covers the output copper bar 323 to improve the safety performance of the battery module 100. Optionally, the output electrode protecting cover 80 is made of an insulating material, and its color is orange or other striking colors, so as to play a role in high-voltage danger warning and protect personnel safety.

In a second aspect, the present utility model also provides a battery pack including a plurality of the battery modules 100 as set forth in any one of the above, the plurality of battery modules 100 being sequentially arranged in the second direction Y.

In summary, the present utility model provides a battery module and a battery pack, where the battery module includes a plurality of battery cells sequentially arranged in a first direction, the battery cells include a plurality of battery cells sequentially arranged in the first direction, the battery cells include positive electrode posts and negative electrode posts that are spaced apart in a second direction, and the first direction and the second direction are perpendicular to each other, and the positive electrode posts in each battery cell are sequentially arranged in the first direction, and the negative electrode posts in each battery cell are sequentially arranged in the first direction; the positive electrode posts in each cell group and the negative electrode posts in the adjacent cell groups are sequentially arranged in the first direction, and the negative electrode posts in each cell group and the positive electrode posts in the adjacent cell groups are sequentially arranged in the first direction; the battery module further comprises a plurality of insulating sheets which are sequentially arranged in the first direction, wherein one electric core is arranged between two adjacent insulating sheets. The battery module and the battery pack provided by the utility model can improve the voltage, current and power of the battery module on the basis of ensuring the safety of the battery module.

The foregoing has outlined rather broadly the more detailed description of embodiments of the utility model, wherein the principles and embodiments of the utility model are explained in detail using specific examples, the above examples being provided solely to facilitate the understanding of the method and core concepts of the utility model; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present utility model, the present description should not be construed as limiting the present utility model.

Claims (10)

1. The battery module is characterized by comprising a plurality of battery cell groups which are sequentially arranged in a first direction, wherein each battery cell group comprises a plurality of battery cells which are sequentially arranged in the first direction, each battery cell comprises a positive electrode post and a negative electrode post which are arranged at intervals in a second direction, the first direction and the second direction are mutually perpendicular,

the positive electrode posts in each cell group are sequentially arranged in the first direction, and the negative electrode posts in each cell group are sequentially arranged in the first direction; the positive electrode posts in each cell group and the negative electrode posts in the adjacent cell groups are sequentially arranged in the first direction, and the negative electrode posts in each cell group and the positive electrode posts in the adjacent cell groups are sequentially arranged in the first direction;

the battery module further comprises a plurality of insulating sheets which are sequentially arranged in the first direction, wherein one electric core is arranged between two adjacent insulating sheets.

2. The battery module of claim 1, further comprising a battery harvesting system disposed on a side of the plurality of cell stacks facing a third direction, the third direction being perpendicular to the first direction and the second direction; wherein, the battery acquisition system includes:

a bracket having two first openings and at least one second opening, the first openings having an extension in the first direction that is less than the extension of the second openings in the first direction;

the bus bar comprises two first connection rows and at least one second connection row, one first connection row is correspondingly arranged in each first opening, one second connection row is correspondingly arranged in each second opening, and the extension length of the first connection row in the first direction is smaller than that of the second connection row in the first direction;

one of the first connection rows is electrically connected with a plurality of positive electrode posts arranged in sequence in the first direction in one of the battery cell groups, the other one of the first connection rows is electrically connected with a plurality of negative electrode posts arranged in sequence in the first direction in the other battery cell group, and each of the second connection rows is electrically connected with a plurality of positive electrode posts and a plurality of negative electrode posts arranged in sequence in the first direction in the two adjacent battery cell groups.

3. The battery module according to claim 2, wherein the bracket includes a plurality of protrusions provided between two of the second openings adjacent in the first direction, or between the first opening and the second opening adjacent in the first direction, or between the first opening and the first opening adjacent in the first direction;

the battery module further comprises a cover plate, the cover plate is arranged on one side, deviating from the plurality of battery cell groups, of the battery acquisition system, a plurality of assembly holes are formed in the cover plate, and the assembly holes are arranged corresponding to the protrusions.

4. The battery module according to claim 3, wherein the battery module comprises m cell groups arranged in the first direction in sequence, each cell group comprising n cells arranged in the first direction in sequence, wherein m is equal to or greater than 6 and n is equal to or greater than 3;

the cover plate comprises bending ribs, and the bending ribs comprise at least one first rib extending along the first direction and at least one second rib extending along the second direction.

5. The battery module according to claim 4, wherein one of the fitting holes is provided at both sides of each of the second beads, respectively.

6. The battery module according to claim 2, wherein two first openings are respectively provided at both ends of the bracket, the bus bar further comprises two output copper bars, each of the output copper bars is electrically connected with the first connection bar in one of the first openings;

the output copper bar comprises a first part, a second part and a third part which are sequentially connected, the first part is in contact with the first connection row, the second part extends from one end of the first part along the direction of the bracket towards the battery cell, the third part extends from one end of the second part along the direction away from the battery cell group, and the third part is parallel to the first part and comprises at least one connection hole;

the battery module further comprises two output electrode bases, the output electrode bases are fixedly connected with the output copper bars, and the output electrode bases comprise threaded holes which are arranged corresponding to the connecting holes.

7. The battery module of claim 6, further comprising two end plates, the two end plates being disposed at two ends of the plurality of cell groups, respectively, wherein the end plates comprise dovetail grooves, the output electrode mount comprises dovetail platforms that are adapted to the dovetail grooves, and the dovetail platforms of the output electrode mount are embedded in the dovetail grooves of the end plates.

8. The battery module according to claim 7, further comprising two side plates respectively disposed on one side of the plurality of cell groups facing the second direction and one side facing away from the second direction, wherein the side plates comprise a side plate main body and two bending portions, the two bending portions are disposed at two ends of the side plate main body, and the two bending portions are welded and fixed with the two end plates respectively.

9. The battery module according to claim 8, wherein the side plate further comprises an insulating thermo-compression film covering a surface of a side of the side plate body facing the battery cell group, both sides of the side plate body, and at least a part of a surface of a side of the side plate body facing away from the battery cell group.

10. A battery pack comprising a plurality of the battery modules according to any one of claims 1 to 9, the plurality of battery modules being arranged in order in the second direction.