CN217719795U - Battery module and battery pack - Google Patents

Battery module and battery pack Download PDF

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Publication number
CN217719795U
CN217719795U CN202220519858.9U CN202220519858U CN217719795U CN 217719795 U CN217719795 U CN 217719795U CN 202220519858 U CN202220519858 U CN 202220519858U CN 217719795 U CN217719795 U CN 217719795U
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China
Prior art keywords
electric core
battery
electric
core groups
adjacent
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CN202220519858.9U
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Chinese (zh)
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李梦甜
杨秋立
马姜浩
金佺良
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Jiangsu Zenio New Energy Battery Technologies Co Ltd
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Jiangsu Zenio New Energy Battery Technologies Co Ltd
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Abstract

The embodiment of the utility model provides a battery module and battery package relates to battery technical field. The battery module and the battery pack comprise a plurality of electric core groups which are arranged in an array manner; two adjacent electric core groups in the same row of electric core groups are connected in series, and two adjacent rows of electric core groups are connected in series; every electric core group all includes a plurality of electric cores, connects in parallel between a plurality of electric cores in the electric core group, can reduce whole weight, reduce cost.

Description

Battery module and battery pack
Technical Field
The utility model relates to a battery technology field particularly, relates to a battery module and battery package.
Background
The battery module provides the electric energy for electric automobile's driving motor, and the electric motor turns into the mechanical energy with the electric energy of power. At present, the most widely used power source is the lead-acid storage battery, but with the development of electric automobile technology, the lead-acid storage battery is gradually replaced by other storage batteries due to low energy, slow charging speed and short service life. The developing power supplies mainly comprise sodium-sulfur batteries, nickel-cadmium batteries, lithium batteries, fuel batteries and the like, and the application of the novel power supplies opens up a wide prospect for the development of electric automobiles.
The problem that weight and cost are great exists in current battery module.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a battery module, for example, it can reduce whole weight, reduce cost.
The utility model discloses an aim still includes, provides a battery package, and it can reduce whole weight, reduce cost.
The embodiment of the utility model discloses a can realize like this:
the embodiment of the utility model provides a battery module, it includes a plurality of electric core groups, a plurality of said electric core group array arrangement;
two adjacent electric core groups in the same row of electric core groups are connected in series, and two adjacent rows of electric core groups are connected in series;
each electric core group comprises a plurality of electric cores, and the plurality of electric cores in the electric core group are connected in parallel.
Optionally, the battery pack further comprises a first connecting piece, a second connecting piece, a third connecting piece and a fourth connecting piece, at least one of the battery cores is connected in parallel through the first connecting piece, two adjacent battery cores in the same row are connected in series through the second connecting piece, and two adjacent rows of the battery cores are connected in series through the third connecting piece or the fourth connecting piece.
Optionally, the battery cells have positive posts and negative posts, and the negative posts on a plurality of battery cells in the same battery pack are electrically connected through the first connecting piece, or the positive posts on a plurality of battery cells in the same battery pack are electrically connected through the first connecting piece, so as to connect the plurality of battery cells in parallel;
in two adjacent electric core groups in the same row of the electric core groups, the positive pole column of the electric core of one electric core group is electrically connected with the negative pole column of the electric core of the other electric core group through a second connecting sheet so as to connect the adjacent electric core groups in series, and a plurality of electric cores in the electric core groups are connected in parallel;
the positive pole column of the electric core in one of the electric core groups and the negative pole column of the electric core in the other electric core group which are positioned at the same end of the two adjacent electric core groups are electrically connected through a third connecting sheet so as to connect the two adjacent electric core groups in series and connect a plurality of electric cores in the electric core groups in parallel;
two adjacent rows of the electric core groups are positioned at one of the positive pole columns of the electric cores in the same end and the negative pole column of the electric cores in the electric core groups are electrically connected through a fourth connecting sheet so as to connect the two adjacent rows of the electric core groups in series.
Optionally, the positive posts of the electric cores in the same electric core group are located on the same straight line, and the negative posts of the electric cores in the same electric core group are located on the same straight line;
the positive pole column in one of the electric core groups in the same column is positioned on the same straight line with the negative pole column in the other adjacent electric core group.
Optionally, the first connecting piece has a plurality of first welding surfaces, and the plurality of first welding surfaces are respectively welded with the plurality of negative poles or the plurality of positive poles of the cells in the same cell group;
the second connecting piece is provided with a plurality of second welding surfaces, wherein half of the second welding surfaces are welded with the positive poles of the cells in the cell core group, and the other half of the second welding surfaces are welded with the negative poles of the adjacent cells in the cell core group;
the third connecting piece is provided with a plurality of third welding surfaces, wherein half of the third welding surfaces are welded with the plurality of positive posts of the battery cells of one battery cell group which is positioned in two adjacent rows and at the same end, and the other half of the third welding surfaces are welded with the plurality of negative posts of the battery cells in the other battery cell group;
the fourth connecting piece is provided with a plurality of fourth welding faces, wherein half of the fourth welding faces are welded with the positive pole columns of the battery cores in the two adjacent rows and located at the same end, and the other half of the fourth welding faces are welded with the negative pole columns of the battery cores in the other battery cores.
Optionally, the first welding surface, the second welding surface, the third welding surface and the fourth welding surface are all circular welding surfaces.
Optionally, the first connecting piece and the second connecting piece are strip-shaped connecting pieces; the third connecting piece and the fourth connecting piece are U-shaped connecting pieces.
Optionally, two of the outside are listed as the same end of the electric core group is anodal output and negative output respectively, and other are listed as all be provided with the insulating piece on the same end of electric core group.
Optionally, the multiple rows of electric core groups are arranged in a snake-shaped series connection mode.
The embodiment of the utility model provides a battery pack is still provided, including apron, box and foretell battery module, the battery module set up in the box, the apron is connected with the box.
The utility model discloses beneficial effect of battery module and battery package includes, for example: through arranging a plurality of electric core group arrays to establish ties two adjacent electric core groups in the same electric core group of row, establish ties the electric core group that adjacent two were listed as simultaneously, and parallelly connected a plurality of electric cores in the electric core group, it can improve electric core voltage to establish ties, parallelly connected can improve electric core capacity, with electric core series-parallel connection, the structure of battery module has been cancelled, also make low voltage pencil reduce at double, thereby reduced the whole weight of battery module, the cost is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on these drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of a battery module according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a battery cell in an embodiment of the present application;
fig. 3 is a schematic structural diagram of a battery pack in an embodiment of the present application.
An icon: 100-a battery module; 110-a cell group; 111-electric core; 1111-positive pole; 1112-a negative pole post; 1113-liquid injection hole; 1114-an explosion-proof valve; 120-a first connection tab; 121-a first bonding face; 130-a second connecting piece; 131-a second weld face; 140-a third connecting piece; 141-a third weld face; 150-a fourth tab; 151-fourth bonding side; 160-extension segment; 170-connecting section; 180-an insulating sheet; 200-a battery pack; 210-a box body; 211-high voltage bus positive harness output aperture; 212-high voltage negative bus harness output aperture; 213-low voltage harness output aperture; 214-mounting holes; 220-cover plate.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that, if the directions or positional relationships indicated by the terms "up", "down", "inside", "outside", etc. appear based on the directions or positional relationships shown in the drawings, or the directions or positional relationships that the products of the present invention are usually placed when used, it is only for convenience of describing the present invention and simplifying the description, but not for indicating or implying that the indicated device or element must have a specific direction, be constructed and operated in a specific direction, and therefore, should not be construed as limiting the present invention.
Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.
The inventor of the application finds that the existing battery module has the problems of more structural members and wire harnesses, and larger weight and cost; the present embodiment provides a battery module for solving the above technical problems.
Referring to fig. 1 to fig. 3, the battery module 100 of the present embodiment includes a plurality of electric core assemblies 110, wherein the electric core assemblies 110 are arranged in an array; two adjacent electric core groups 110 in the same row of electric core groups 110 are connected in series, and two adjacent rows of electric core groups 110 are connected in series; each battery pack 110 includes a plurality of battery cells 111, and the plurality of battery cells 111 in the battery pack 110 are connected in parallel.
In this embodiment, the plurality of electric core groups 110 are arranged in an array, and the adjacent electric core groups 110 are close to each other, so that the mass density and the volume density can be improved; in addition, the multiple rows of electric core groups 110 are arranged in series in a snake shape.
In the embodiment, sixty-four battery cells 111 are taken as an example, the sixty-four battery cells 111 are arranged into four rows, each row of sixteen battery cells 111 is divided into eight battery cell groups 110, and each battery cell group 110 includes two battery cells 111; two electric cores 111 with in every electric core group 110 are parallelly connected, establish ties a plurality of electric core groups 110 according to snakelike direction in proper order simultaneously to make two adjacent electric core groups 110 establish ties in same electric core group 110 of being listed as, and make two adjacent electric core groups 110 of being listed as establish ties.
The single-row electric core group 110 is 2P8S (two parallel and eight series), the four-row electric core group 110 is 2P32S (two parallel and thirty-two series), and when the capacity of a single electric core is 150Ah, the capacities of the sixty-four electric cores 111 are 300Ah, and the capacities of the electric cores are doubled. Under the same electric core 111 quantity, the parallel design can improve electric core capacity by times, and can make the low pressure connect and insert terminal quantity by times and reduce.
Through arranging a plurality of electric core groups 110 array, and establish ties two adjacent electric core groups 110 in the same electric core group 110, establish ties two adjacent electric core groups 110 simultaneously, and establish ties a plurality of electric cores 111 in the electric core group 110 parallelly, it can improve electric core voltage to establish ties, parallelly connected can improve electric core capacity, get up electric core 111 series-parallel connection, battery module 100's structure has been cancelled, also make low voltage pencil reduce at double, thereby reduced battery module 100 whole weight, and the cost is reduced.
The battery module 100 of the embodiment further includes a first connecting piece 120, a second connecting piece 130, a third connecting piece 140 and a fourth connecting piece 150, the plurality of battery cells 111 in at least one battery cell pack 110 are connected in parallel through the first connecting piece 120, two adjacent battery cell packs 110 in the same row are connected in series through the second connecting piece 130, and two adjacent battery cell packs 110 are connected in series through the third connecting piece 140 or the fourth connecting piece 150.
The battery cells 111 are provided with positive posts 1111 and negative posts 1112, and the negative posts 1112 on the plurality of battery cells 111 in the same battery pack 110 are electrically connected through the first connecting piece 120, or the positive posts 1111 on the plurality of battery cells 111 in the same battery pack 110 are electrically connected through the first connecting piece 120, so as to connect the plurality of battery cells 111 in parallel; in two adjacent electric core groups 110 in the same row of electric core groups 110, the positive pole 1111 of the electric core 111 of one electric core group 110 and the negative pole 1112 of the electric core 111 of the other electric core group 110 are electrically connected through the second connecting sheet 130, so as to connect the adjacent electric core groups 110 in series, and connect a plurality of electric cores 111 in the electric core group 110 in parallel; the positive electrode posts 1111 of the electric cells 111 in one electric core group 110 and the negative electrode posts 1112 of the electric cells 111 in the other electric core group 110 which are positioned at the same end in two adjacent columns of electric core groups 110 are electrically connected through a third connecting piece 140, so that the two adjacent columns of electric core groups 110 are connected in series, and a plurality of electric cells 111 in the electric core group 110 are connected in parallel; the positive pole 1111 of the electric core 111 in one of the electric core groups 110 and the negative pole 1112 of the electric core 111 in the other electric core group 110 which are positioned at the same end in two adjacent columns of the electric core groups 110 are electrically connected through a fourth connecting sheet 150, so as to connect the two adjacent columns of the electric core groups 110 in series.
A liquid injection hole 1113 is arranged between the positive pole 1111 and the negative pole 1112 of the battery cell 111, the liquid injection hole 1113 is positioned on the top surface of the battery cell 111 to prevent the electrolyte from leaking, and two side surfaces of the battery cell 111 are respectively provided with an explosion-proof valve 1114.
It should be noted that the positive poles 1111 of the cells 111 in the same cell group 110 are located on the same straight line, and the negative poles 1112 of the cells 111 in the same cell group 110 are located on the same straight line; the positive pole 1111 of one electric core set 110 in the same row of electric core sets 110 is aligned with the negative pole 1112 of the other adjacent electric core set 110.
In this embodiment, the number of the first connection pieces 120 includes six, two of the first connection pieces 120 are respectively disposed on two rows of the outermost electric core groups 110 and located on two electric core groups 110 at one end of the battery module 100, the other four first connection pieces 120 are respectively disposed on four rows of the outermost electric core groups 110 and located on four electric core groups 110 at the other end of the battery module 100, and a single first connection piece 120 is simultaneously electrically connected to two positive poles 1111 or two negative poles 1112 of two electric cores 111 in the corresponding electric core group 110, so as to connect the two electric cores 111 in parallel.
The number of the second connecting sheets 130 includes twenty eight, the second connecting sheets 130 are disposed on two adjacent electric core groups 110 in the same column of electric core groups 110, and a single second connecting sheet 130 is electrically connected to two positive poles 1111 and two negative poles 1112 of four electric cores 111 in the corresponding two electric core groups 110 at the same time, so as to connect the adjacent electric core groups 110 in series, and connect two electric cores 111 in a single electric core group 110 in parallel. The two adjacent second connecting pieces 130 in the same row of the electric core groups 110 are arranged in a staggered manner, so that the eight electric core groups 110 in the same row are connected in series.
The number of the third connecting pieces 140 includes one, the third connecting pieces 140 are disposed on two middle columns of the electric core groups 110 and located on the two electric core groups 110 at the same end, and the third connecting pieces 140 are simultaneously electrically connected with the two positive poles 1111 and the two negative poles 1112 of the four electric cores 111 of the two electric core groups 110, so as to connect the adjacent electric core groups 110 in series and connect the two electric cores 111 in the single electric core group 110 in parallel.
The number of the fourth connecting pieces 150 includes two, and two of the fourth connecting pieces 150 are overlapped with adjacent two of the four first connecting pieces 120 positioned at the same end, respectively, to connect the outermost row of electric core groups 110 and the adjacent row of electric core groups 110 in series.
By using the first connecting sheet 120, the second connecting sheet 130, the third connecting sheet 140 and the fourth connecting sheet 150, two cells 111 in a single cell group 110 are connected in parallel, and simultaneously, a plurality of cell groups 110 are also connected in series in a serpentine direction in sequence, so that a layout of two cells 111 connected in parallel and thirty-two cells connected in series is formed.
Further, the first connecting piece 120 has a plurality of first welding surfaces 121, and the plurality of first welding surfaces 121 are respectively welded with the plurality of negative poles 1112 or the plurality of positive poles 1111 of the cells 111 in the same cell group 110; the second connecting piece 130 has a plurality of second welding surfaces 131, wherein half of the second welding surfaces 131 are welded with the plurality of positive posts 1111 of the cells 111 in the cell group 110, and the other half of the second welding surfaces 131 are welded with the plurality of negative posts 1112 of the cells 111 in the adjacent cell group 110; the third connecting piece 140 has a plurality of third welding surfaces 141, wherein half of the third welding surfaces 141 are welded with the plurality of positive posts 1111 of one of the battery cells 111 of the battery cell group 110 in two adjacent columns and at the same end, and the other half of the third welding surfaces 141 are welded with the plurality of negative posts 1112 of the battery cells 111 of the other battery cell group 110; the fourth connecting piece 150 has a plurality of fourth welding surfaces 151, wherein half of the fourth welding surfaces 151 are welded to the positive posts 1111 of the cells 111 of one of the cell groups 110 located in two adjacent columns and at the same end, and the other half of the fourth welding surfaces 151 are welded to the negative posts 1112 of the cells 111 of the other cell group 110.
In this embodiment, the first connecting plate 120 has two first welding surfaces 121, and the two first welding surfaces 121 are respectively welded to two negative poles 1112 or two positive poles 1111 of two battery cells 111 in the same battery cell group 110, so as to connect the two battery cells 111 in parallel.
The second connecting piece 130 has four second welding surfaces 131, wherein two second welding surfaces 131 are welded with the two positive posts 1111 of two cells 111 in one cell group 110, and the other two second welding surfaces 131 are welded with the two negative posts 1112 of two cells 111 in the adjacent cell group 110, on one hand, two cells 111 in a single cell group 110 are connected in parallel, and on the other hand, the two cell groups 110 are connected in series.
The third connecting sheet 140 has four third welding surfaces 141, two of the third welding surfaces 141 are welded to two positive poles 1111 of the cells 111 in one of the cell packs 110 in the two middle columns and located at the same end, and the other two third welding surfaces 141 are welded to two negative poles 1112 of the cells 111 in the other cell pack 110, so that the two cells 111 in the single cell pack 110 are connected in parallel on one hand, and the two cell packs 110 are connected in series on the other hand.
The fourth connecting plate 150 has two fourth welding surfaces 151, and the two fourth welding surfaces 151 are respectively welded to the two first connecting plates 120 adjacent to one end of the battery module 100 to connect the outermost row of electric core packs 110 and the adjacent row of electric core packs 110 in series.
In this embodiment, the first welding surface 121, the second welding surface 131, the third welding surface 141, and the fourth welding surface 151 are all circular welding surfaces, and the battery cell 111 is electrically connected to the first connecting piece 120, the second connecting piece 130, the third connecting piece 140, the fourth welding surface 151, and the battery cell 111 by laser welding.
The circular welding surface design is beneficial to reducing the point discharge of the battery cells 111, and the contact internal resistance of the electric connection between the battery cells 111 is reduced, so that the heat dissipation between the battery cells 111 is accelerated, and the charge and discharge efficiency of the battery cells 111 is improved.
In this embodiment, the first connecting piece 120 and the second connecting piece 130 are both strip-shaped connecting pieces, and the third connecting piece 140 and the fourth connecting piece 150 are U-shaped connecting pieces.
It should be noted that the U-shaped connecting piece includes two extending sections 160 and a connecting section 170, two ends of the connecting section 170 are respectively connected with the two extending sections 160, and the two extending sections 160 are parallel; the distance between the positive pole 1111 and the negative pole 1112 welded by the third connecting piece 140 is smaller, and correspondingly, the connecting section 170 of the U-shaped connecting piece is shorter; the positive pole 1111 and the negative pole 1112 welded to the fourth connecting piece 150 have a larger distance therebetween, and correspondingly, the connecting section 170 of the U-shaped connecting piece has a longer length.
In this embodiment, the first connecting piece 120, the second connecting piece 130, the third connecting piece 140 and the fourth connecting piece 150 are all copper bars.
The same end of two rows of electric core groups 110 in the outside is anodal output and negative output respectively, and the same of the electric core group 110 of other rows all is provided with insulating piece 180.
In this embodiment, the middle two same serving of the electric core group 110 all is provided with insulating piece 180, and insulating piece 180, anodal output and negative pole output are located same end, because anodal output and negative pole output are high voltage output end, insulating piece 180 set up can strengthen the insulation protection.
The embodiment further provides a battery pack 200, which includes a cover plate 220, a case 210 and the battery module 100, wherein the battery module 100 is disposed in the case 210, and the cover plate 220 is fixed to the case 210 by screws; the space of sealed cushion is reserved all around to box 210 outer fringe, and the space of electrical component BMS, BCU, BDU, high-low pressure connector, fuse and explosion-proof valve 1114 is reserved in battery package 200 box 210.
A high-voltage total positive wire harness output hole 211, a high-voltage total negative wire harness output hole 212, a low-voltage wire harness output hole 213 and a mounting hole 214 are formed in the side wall of the box body 210, the high-voltage total positive wire harness output hole 211, the high-voltage total negative wire harness output hole 212 and the low-voltage wire harness output hole 213 are used for leading out a high-voltage total positive wire harness, a high-voltage total negative wire harness and a low-voltage wire harness respectively, and the mounting hole 214 is used for arranging an explosion-proof ventilation valve.
To sum up, the embodiment of the utility model provides a battery module 100 and battery package 200, through arranging electric core 111 array, and utilize first connection piece 120, second connection piece 130, a plurality of electric cores 111 of third connection piece 140 and fourth connection piece 150 in with every electric core group 110 are parallelly connected, and establish ties a plurality of electric core groups 110 according to snakelike direction, it can improve electric core voltage to establish ties, it can improve electric core capacity to connect in parallel, connect in series and connect in parallel electric core 111, the structure of battery module 100 has been cancelled, also make low pressure pencil double reduction, thereby reduced battery module 100 whole weight, and the cost is reduced.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. The battery module is characterized by comprising a plurality of electric core groups, wherein the electric core groups are arranged in an array;
two adjacent electric core groups in the same row of electric core groups are connected in series, and two adjacent rows of electric core groups are connected in series;
each electric core group comprises a plurality of electric cores, and the plurality of electric cores in the electric core group are connected in parallel.
2. The battery module of claim 1, further comprising a first connecting sheet, a second connecting sheet, a third connecting sheet, and a fourth connecting sheet, wherein a plurality of the electric cores in at least one of the electric core groups are connected in parallel through the first connecting sheet, two adjacent electric core groups in the same row are connected in series through the second connecting sheet, and two adjacent rows of the electric core groups are connected in series through the third connecting sheet or the fourth connecting sheet.
3. The battery module according to claim 2, wherein the cells have positive and negative posts, and the negative posts on a plurality of the cells in the same cell group are electrically connected through the first connecting piece, or the positive posts on a plurality of the cells in the same cell group are electrically connected through the first connecting piece, so as to connect a plurality of the cells in parallel;
in two adjacent electric core groups in the same row of the electric core groups, the positive pole column of the electric core of one electric core group is electrically connected with the negative pole column of the electric core of the other electric core group through a second connecting sheet so as to connect the adjacent electric core groups in series, and a plurality of electric cores in the electric core groups are connected in parallel;
the positive pole column of one electric core in one electric core group and the negative pole column of the other electric core in the electric core group which are positioned at the same end in two adjacent electric core groups are electrically connected through a third connecting sheet so as to connect the two adjacent electric core groups in series and connect a plurality of electric cores in the electric core group in parallel;
two adjacent rows of the electric core groups are positioned at one of the positive pole columns of the electric cores in the same end and the negative pole column of the electric cores in the electric core groups are electrically connected through a fourth connecting sheet so as to connect the two adjacent rows of the electric core groups in series.
4. The battery module according to claim 3, wherein the positive posts of the cells in the same cell group are located on the same straight line, and the negative posts of the cells in the same cell group are located on the same straight line;
the positive pole column in one of the electric core groups in the same column is positioned on the same straight line with the negative pole column in the other adjacent electric core group.
5. The battery module according to claim 3, wherein the first connecting tab has a plurality of first welding surfaces, and the plurality of first welding surfaces are respectively welded with a plurality of negative posts or a plurality of positive posts of the cells in the same cell pack;
the second connecting piece is provided with a plurality of second welding surfaces, wherein half of the second welding surfaces are welded with the positive poles of the cells in the cell core group, and the other half of the second welding surfaces are welded with the negative poles of the adjacent cells in the cell core group;
the third connecting piece is provided with a plurality of third welding surfaces, wherein half of the third welding surfaces are welded with the positive posts of the battery cells of one battery cell group in two adjacent columns and at the same end, and the other half of the third welding surfaces are welded with the negative posts of the battery cells in the other battery cell group;
the fourth connecting piece is provided with a plurality of fourth welding faces, wherein half of the fourth welding faces are in welding connection with two adjacent rows and located at one of the positive poles of the battery core group at the same end, and the other half of the fourth welding faces are in welding connection with the negative poles of the battery cores in the battery core group.
6. The battery module according to claim 5, wherein the first welding surface, the second welding surface, the third welding surface, and the fourth welding surface are circular welding surfaces.
7. The battery module according to claim 2, wherein the first connecting piece and the second connecting piece are strip-shaped connecting pieces; the third connecting piece and the fourth connecting piece are U-shaped connecting pieces.
8. The battery module according to claim 1, wherein the same ends of two outermost rows of the electric core groups are respectively a positive electrode output end and a negative electrode output end, and the same ends of the other rows of the electric core groups are provided with insulating sheets.
9. The battery module according to claim 1, wherein a plurality of the electric core groups are arranged in a serpentine shape in series.
10. A battery pack, comprising a cover plate, a case, and the battery module according to any one of claims 1 to 9, wherein the battery module is disposed in the case, and the cover plate is connected to the case.
CN202220519858.9U 2022-03-10 2022-03-10 Battery module and battery pack Active CN217719795U (en)

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Application Number Priority Date Filing Date Title
CN202220519858.9U CN217719795U (en) 2022-03-10 2022-03-10 Battery module and battery pack

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Application Number Priority Date Filing Date Title
CN202220519858.9U CN217719795U (en) 2022-03-10 2022-03-10 Battery module and battery pack

Publications (1)

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CN217719795U true CN217719795U (en) 2022-11-01

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CN202220519858.9U Active CN217719795U (en) 2022-03-10 2022-03-10 Battery module and battery pack

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