Battery modules and electrical equipment

Abstract

A battery cell and an electrical equipment using the battery cell, comprising: a plurality of battery cells and a holder, the plurality of battery cells being stacked and arranged along a first direction, each battery cell including a first terminal and a second terminal having opposite polarity, the holder including a plurality of groups of through holes, each group including a first terminal through hole and a second terminal through hole, the first terminal and the second terminal of the same battery cell respectively passing through the first terminal through hole and the second terminal through hole of the same group, the plurality of groups of through holes including a first group through hole, a second group through hole, and a third group through hole of a plurality of groups located between the first group through hole and the second group through hole, and a distance D1 between the first terminal through hole of the first group of through holes and the second terminal through hole of the third group adjacent thereto is greater than a distance D3 between the adjacent through holes of the third group. The present application increases the distance between the through hole for the first terminal in the first group of through holes and the through hole for the second terminal in the adjacent third group of through holes, thereby reducing the risk of a short circuit due to the pitch between the first terminal and the second terminal being too small.

Description

Technical Field

[0001] This application relates to the technical field of battery cell stacking, and particularly to battery modules and electrical equipment.

Background Art

[0002] Currently, when many battery cells in the market are stacked, if the distance between the electrode tabs of two adjacent battery cells is too close, there is an easy risk of short circuit, and there is a certain safety risk.

Summary of the Invention

Problems to be Solved by the Invention

[0003] In consideration of the above situation, it is necessary to provide a battery module capable of reducing the short-circuit risk of battery cells and an electrical equipment including the battery module.

Means for Solving the Problems

[0004] The battery module according to an embodiment of this application includes a plurality of battery cells and a holder. The plurality of battery cells are stacked and arranged along a first direction. Each battery cell includes a first terminal and a second terminal, and the polarities of the first terminal and the second terminal are opposite. The holder includes a plurality of groups of through holes. Each group of through holes includes a through hole for the first terminal and a through hole for the second terminal. The first terminal and the second terminal of the same battery cell respectively pass through the through hole for the first terminal and the through hole for the second terminal of the same group. The plurality of groups of through holes include a first group of through holes, a second group of through holes, and a third group of through holes located between the first group of through holes and the second group of through holes. Here, along the first direction, the distance D1 between the through hole for the first terminal of the first group of through holes and the through hole for the second terminal of the third group of through holes adjacent thereto is greater than the distance D3 between the adjacent third group of through holes.

[0005] This increases the distance between the first terminal in the first terminal through-hole of the first group of through-holes and the second terminal in the second terminal through-hole of the adjacent third group of through-holes, thereby reducing the risk of short circuits between the first and second terminals, increasing the connectable area, facilitating the installation of the first connector, and further reducing the risk of short circuits between the first connector and the second terminal in the adjacent third group of through-holes.

[0006] Of the two adjacent third-group through-holes, the distance between the first terminal through-hole of one third-group through-hole and the second terminal through-hole of the other third-group through-hole is D3, and the first terminal through-hole of one third-group through-hole and the second terminal through-hole of the other third-group through-hole are arranged to face each other along the first direction.

[0007] In some embodiments of this application, the difference between D1 and D3 is greater than 6 mm.

[0008] The above-described embodiment is advantageous in improving the connection area between the first connector and the first terminal and in reinforcing the welding area between the first connector and the first terminal.

[0009] In some embodiments of the present application, the distance D2 between the second terminal through-hole of the second group of through-holes and the first terminal through-hole of the third group of through-holes adjacent thereto is less than D3.

[0010] The above-described embodiment makes it possible to reduce the distance between the through-holes of the second group and the through-holes of the third group adjacent to it, and to adjust the distance from the first terminal through-hole of the first group to the through-hole of the second group along the first direction X.

[0011] In some embodiments of the present application, along a first direction, the distance d1 from the first terminal through-hole of the first group of through-holes to the second terminal through-hole of the second group of through-holes is equal to the distance d2 from the second terminal through-hole of the first group of through-holes to the first terminal through-hole of the second group of through-holes.

[0012] In the embodiment described above, the length extending from the battery cell case of the first terminal can be cut to match the length extending from the battery cell case of the second terminal, making production easy.

[0013] In some embodiments of the present application, the holder includes a substrate and a plurality of groups of protrusions spaced apart therefrom, the substrate includes a first side and a second side facing each other along a second direction, and the plurality of groups of protrusions are located on the first side of the substrate. Viewed along the second direction, the plurality of groups of protrusions include a first group of protrusions located between a first group of through holes and an adjacent third group of through holes, a second group of protrusions located between a second group of through holes and an adjacent third group of through holes, and a third group of protrusions located between the first group of protrusions and the second group of protrusions. The first group of protrusions includes a first portion located between a first terminal through hole and a second terminal through hole of an adjacent third group of through holes, and a second portion located between a second terminal through hole and a first terminal through hole of an adjacent third group of through holes. Along the second direction, the width of the projection of the first part onto the substrate along the first direction is W1, and the width of the projection of the second part onto the substrate along the first direction is W2, where W1 is greater than W2.

[0014] The above-described embodiment is advantageous in that the first terminal of the first portion is far away along the first direction X from the second terminal in the through hole of the adjacent third group, thereby increasing the distance between the first and second terminals and reducing the risk of a short circuit between the first and second terminals.

[0015] In some embodiments of the present application, the distance from the first portion to the convex portion of the second group along the first direction is equal to the distance from the second portion to the convex portion of the second group.

[0016] In some embodiments of the present application, the protrusions in each group gradually decrease in size along the direction opposite to the second direction.

[0017] The above-described embodiment acts as a guide for the movement of the first and second terminals, guiding them to move closer to the substrate.

[0018] In some embodiments of the present application, viewed along the second direction, the second group of protrusions includes a third portion located between the second terminal through-hole of the second group of through-holes and the first terminal through-hole of the adjacent third group of through-holes, and a fourth portion located between the first terminal through-hole of the second group of through-holes and the second terminal through-hole of the adjacent third group of through-holes. Along the second direction, the width of the third portion along the first direction of projection onto the substrate is W3, and the width of the fourth portion along the first direction of projection onto the substrate is W4, where W3 is smaller than W4.

[0019] The above-described embodiment is advantageous in guiding the assembly process to position the second terminal of the second terminal through-hole located in the second group through-hole close to the adjacent third group through-hole, and also allows the distance between the first terminal through-hole of the second group through-hole and the adjacent third group through-hole to be equal to D3.

[0020] In some embodiments of the present application, along a first direction, the substrate includes a first side and a second side, the distance from the second terminal through-hole of the second group of through-holes to the first side is d21, and the distance from the first terminal through-hole of the second group of through-holes to the first side is d22, where d21 is greater than d22.

[0021] The above-described embodiment increases the distance between the through-hole for the second terminal of the second group of through-holes and the substrate side, thereby facilitating welding between the connection portion of the second terminal and the second connector.

[0022] In some embodiments of the present application, along a first direction, the substrate includes a second side and a first side, and the side of the first group of through-holes for the first terminals that is farther from the second group of through-holes penetrates the second side.

[0023] According to the above-described embodiments, it is convenient to bend the connection portion of the first terminal provided in the through hole for the first terminal of the through holes in the first group outward and weld it to the first connector.

[0024] In some embodiments of the present application, the holder includes a third side and a fourth side arranged opposite to each other along a third direction, and an opening arranged on the third side. A plurality of gaps are formed between the plurality of groups of convex portions, and along the third direction, the opening communicates with the plurality of gaps.

[0025] In some embodiments of the present application, a first inclined surface and a second inclined surface are provided at the end portions located on the third side of the plurality of groups of convex portions. Along the third direction, the distance along the first direction between the first inclined surface and the second inclined surface of the convex portions in the same group gradually increases from the third side toward the fourth side.

[0026] The above-described embodiments are convenient for guiding the first terminal and the second terminal into the gap between two adjacent groups of convex portions and increasing the success rate when the battery cell and the holder are docked.

[0027] In some embodiments of the present application, the battery cell further includes a battery cell case and an electrode assembly. The battery cell case includes a housing portion and a peripheral edge portion extending outward from the housing portion. The housing portion includes a first surface and a second surface arranged to face each other along a first direction. The first terminal and the second terminal protrude out of the battery cell case from the peripheral edge portion. The electrode assembly is housed in the housing portion, and the first terminal and the second terminal are electrically connected to the electrode assembly.

[0028] In some embodiments of the present application, the peripheral edge portion is provided between the plane where the first surface is located and the plane where the second surface is located, and is closer to the first surface.

[0029] In some embodiments of the present application, the battery cell case includes a first region and a second region. A first space is provided in the first region 21a, and the electrode assembly is provided in the first space. The second region has a flat plate structure, and the first region is connected to the second region. The side of the first region is connected to the side of the second region to form a plurality of beaded portions. The first terminal and the second terminal extend out of the battery cell case from one of the beaded portions.

[0030] In some embodiments of the present application, the first surface is provided in the second region, and the second surface is provided in the first region.

[0031] In some embodiments of the present application, the two first surfaces of any two adjacent battery cells are arranged opposite to each other or the two second surfaces are arranged opposite to each other.

[0032] In some embodiments of the present application, the first terminal and the second terminal between at least two adjacent battery cells are connected, or the first terminals between adjacent battery cells are connected.

[0033] In some embodiments of the present application, the first terminal and the second terminal connected to each other are bent and connected so as to face each other. The first terminal includes a first terminal connection portion that passes through a through hole for the first terminal, and the second terminal includes a second terminal connection portion that passes through a through hole for the second terminal. The battery module further includes a plurality of conductive members. The plurality of conductive members are provided on the side opposite to the convex portion of the substrate. The first terminal connection portion and the second terminal connection portion are connected to the conductive members. The holder further includes a partition portion located on the first side of the substrate. The partition portion is provided between the through hole for the first terminal and the through hole for the second terminal of the same group of through holes.

[0034] The partition portion of the above-described embodiment can reduce the probability that other foreign objects fall between the through hole for the first terminal and the through hole for the second terminal of the same group, and further reduce the risk that the first terminal and the second terminal are short-circuited by this foreign object. As an option, the partition portion can also strengthen the structural strength of the holder.

[0035] In some embodiments of the present invention, the battery module further includes a sampling member that is positioned on the opposite side of the protrusions of the substrate and connected to a conductive member.

[0036] In some embodiments of the present invention, the battery module further includes a first connector and a second connector, one end of the first connector connected to a first terminal passing through a first terminal through-hole of a first group of through-holes, the other end of the first connector having a first connecting portion, one end of the second connector connected to a second terminal passing through a second terminal through-hole of a second group of through-holes, the other end of the second connector having a second connecting portion, and the first and second connecting portions are located on the same side of the substrate.

[0037] The above-described embodiment facilitates connection with external equipment and improves space utilization.

[0038] In some embodiments of the present invention, the holder further includes a first insulating column, one end of which is connected to a substrate and the other end of which abuts against a first connector.

[0039] The first insulating column in the above-described embodiment can effectively support the first connector and reduce the probability of the first connector coming into contact with the bent first and second terminals and causing a short circuit.

[0040] In some embodiments of the present application, the holder further includes an insulating block, which is provided on the second side of the substrate and is located between the first terminal through-hole of the first group of through-holes and the adjacent third group of through-holes, and along the third direction, the length of the insulating block is longer than the length of the first terminal through-hole of the first group of through-holes.

[0041] The insulating block described in the above embodiment is used to isolate the first connector, to isolate the first terminal welded to the first connector from the adjacent second terminal, and to reduce the risk of a short circuit between the first connector and the second terminal in the through-hole of the third group.

[0042] Embodiments of the present invention also provide an electrical equipment including the battery module described above.

[0043] The aforementioned battery module and electrical equipment increase the distance between the first terminal and the second terminal by increasing the distance between the first terminal through-hole of the first group of through-holes and the second terminal through-hole of the adjacent third group of through-holes. This reduces the risk of short circuits due to insufficient spacing between the first and second terminals, increases the connectable area, and facilitates the installation of the first connector. Furthermore, it reduces the risk of short circuits between the first connector and the second terminal in the adjacent third group of through-holes. [Brief explanation of the drawing]

[0044] [Figure 1] This is a schematic diagram showing the disassembled state of a battery module according to one embodiment of the present invention. [Figure 2] Figure 1 shows a battery cell according to one embodiment of the present invention connected to a holder. [Figure 3] This is Figure 1 of a battery cell according to one embodiment of the present invention. [Figure 4] This is Figure 2 of a battery cell according to one embodiment of the present invention. [Figure 5] This is a schematic diagram of a battery cell in a disassembled state before packaging, according to one embodiment of the present invention. [Figure 6] This is Figure 1 of a holder in one embodiment of the present invention. [Figure 7] This is Figure 2 of a holder in one embodiment of the present invention. [Figure 8] This is a schematic diagram of the structure of a battery cell before the electrode tabs are bent in one embodiment of the present invention. [Figure 9] This is a schematic diagram of a stacked structure of a battery cell according to one embodiment of the present invention. [Figure 10] This is a schematic diagram showing the folded state of the electrode tabs after the battery cells according to one embodiment of the present invention have been stacked. [Figure 11] This is a schematic diagram of the structure of a sampling member and a conductive member according to one embodiment of the present application, in a state in which they are attached to a holder. [Figure 12]Figure 2 shows a battery cell according to one embodiment of the present invention connected to a holder. [Figure 13] This is a schematic diagram showing the state in which a second connector according to one embodiment of the present application is connected to a holder. [Figure 14] This is a schematic diagram of the structure in which the first connector and the second connector according to one embodiment of the present application are connected to the holder. [Figure 15] This is a diagram illustrating the configuration of an electrical equipment according to one embodiment of the present invention. [Figure 16] This is a schematic diagram showing the distance between the first group of through holes and the adjacent third group of through holes in one embodiment of the present invention. [Figure 17] This is a schematic diagram showing the distance between two adjacent third-group through holes in one embodiment of the present invention. [Figure 18] This is a schematic diagram showing the distance between the first group of through holes and the second group of through holes in one embodiment of the present invention. [Modes for carrying out the invention]

[0045] The present application will be further described with reference to the drawings described above, with respect to the following specific embodiments.

[0046] The following describes the technical aspects of the embodiments of the present application in accordance with the drawings of the embodiments; however, it is clear that the embodiments described are only a subset of the embodiments of the present application and not all embodiments.

[0047] When one component is considered to be "connected" to another component, it may be directly connected to the other component, or an intermediate medium may be present simultaneously. When one component is considered to be "installed" on another component, it may be directly installed on the other component, or an intermediate medium may be present simultaneously.

[0048] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art of this application. Terms used in this specification are for the purpose of describing specific embodiments and are not intended to limit this application. The terms "or / and" as used herein include any and all combinations of one or more related enumerated items.

[0049] When two parts are placed parallel / perpendicular, they are positioned in the same direction and have a constant angle between them. A tolerance of 0-±5% is allowed between the two parts. The tolerance between the two parts is greater than 0-±5%, equal to 0-±5%, or less than 0-±5%.

[0050] Embodiments of the present invention will be further described with reference to the attached drawings. As shown in Figures 1 and 2, the battery module 100 according to the embodiment of the present invention comprises a housing 3, a holder 1, and a plurality of battery cells 2. The housing 3 includes a first housing 31 and a second housing 32. The first housing 31 and the second housing 32 form a single housing space. The plurality of battery cells 2 are arranged in a sequential stack along a first direction X. The plurality of battery cells 2 and the holder 1 are connected and then housed in the housing space.

[0051] As shown in Figures 3, 4, and 5, the battery cell 2 includes a battery cell case 21, an electrode assembly 22, a first terminal 23, and a second terminal 24. The electrode assembly 22 is housed inside the battery cell case 21. The first terminal 23 and the second terminal 24 are connected to the electrode assembly 22 and extend from the battery cell case 21. The electrode assembly 22 includes a winding structure formed by winding a positive electrode sheet, a negative electrode sheet, and a separator film. Furthermore, the battery cell case 21 includes a housing section 211 that is connected to one another, and a edging section 212 located on the edge of the housing section 211 and extending outward from the housing section 211. The electrode assembly 22 is housed within the housing section 211, and the first terminal 23 and the second terminal 24 extend from the edging section 212. If the direction of extension of the side where the battery cell 2 and the holder 1 are connected is defined as the third direction Z, then the first terminal 23 and the second terminal 24 of at least one battery cell 2 are sequentially spaced apart along the third direction Z.

[0052] In some embodiments, the battery cell case 21 includes a first region 21a and a second region 21b. The first region 21a is provided with a first space 211a. The electrode assembly 22 is provided in the first space 211a. The second region 21b has a substantially flat structure. The first region 21a and the second region 21b are connected. The sides of the first region 21a and the sides of the second region 21b are connected to each other, forming a plurality of border portions 212. The first terminal 23 and the second terminal 24 extend from one of their border portions 212 into the battery cell case 21.

[0053] The first terminal 23 and the second terminal 24 have opposite polarities. One of the first terminal 23 and the second terminal 24 is the positive terminal, and the other is the negative terminal. In some embodiments, the battery cell case 21 includes an aluminum plasticized film. In this embodiment, the second terminal 24 is described as the positive terminal and the first terminal 23 as the negative terminal.

[0054] As shown in Figures 3 and 4, along the first direction X, the housing portion 211 includes two opposing surfaces: a first surface 2111 and a second surface 2112. The first surface 2111 and the second surface 2112 are two opposing outer surfaces of the housing portion 211. Optionally, the first surface 2111 is provided in the second region 21b, and the second surface 2112 is provided in the first region 21a.

[0055] Furthermore, the border portion 212 is located between the plane on which the first surface 2111 is located and the plane on which the second surface 2112 is located. In some embodiments, the distance between the border portion 212 and the plane on which the first surface 2111 is located is smaller than the distance between the border portion 212 and the plane on which the second surface 2112 is located; that is, the border portion 212 is close to the first surface 2111.

[0056] In some embodiments, along a first direction X, the two first surfaces 2111 of any two adjacent housings 211 are arranged opposite each other, or the two second surfaces 2112 are arranged opposite each other.

[0057] As shown in Figure 9, in one embodiment, the battery cells 2 stacked along a first direction X are stacked and arranged in such an order that two second faces 2112 are facing each other and two first faces 2111 are facing each other.

[0058] In some embodiments, along a first direction X, the first terminal 23 of one battery cell 2 is electrically connected to the second terminal 24 of the other battery cell 2, which is facing the first surface 2111 of the first battery cell 2.

[0059] In some embodiments, along a first direction X, the second terminal 24 of any battery cell 2 is electrically connected to the first terminal 23 of the battery cell 2 facing the second surface 2112 of the battery cell 2.

[0060] In some embodiments, the first terminal 23 of battery cell 2 may be connected to the first terminal 23 of another adjacent battery cell 2 along the first direction X.

[0061] As shown in Figures 2 and 9, in some embodiments, along a first direction X, the first terminal 23 of the outermost battery cell 2 is further connected to a first connector 61, and the second terminal 24 of another outermost battery cell 2 is further connected to a second connector 62. The first connector 61 and the second connector 62 are used to connect to an external device. The battery cell 2 includes a plurality of battery cells 2 located between two outermost battery cells 2. The first terminal 23 of one battery cell 2 is electrically connected to the second terminal 24 of the other battery cell 2, which is facing the first surface 2111 of the battery cell 2, and the second terminal 24 of the other battery cell 2 is electrically connected to the first terminal 23 of the battery cell 2, which is facing the second surface 2112 of the battery cell 2.

[0062] As shown in Figures 6, 7, and 8, the holder 1 includes a substrate 11 and multiple groups of spaced-apart protrusions 12. The substrate 11 is a plate-like structure arranged substantially parallel to the plane in which the first direction X and the third direction Z are located. Here, the third direction Z is perpendicular to the first direction X. The substrate 11 includes a first side 11a and a second side 11b that are opposite each other along the second direction Y. The multiple groups of spaced-apart protrusions 12 are provided on the first side 11a of the substrate 11. The second direction Y is perpendicular to the plane in which the first direction X and the third direction Z are located.

[0063] As shown in Figures 6 and 11, the substrate 11 is provided with multiple groups of through-holes 111 arranged along a first direction X. The through-holes 111 penetrate the substrate 11 along a second direction Y. At least some of the through-holes 111 are elongated and extend in the substrate 11 along a third direction Z. The length of the through-holes 111 along the first direction X is smaller than the length of the through-holes 111 along the third direction Z. Some of the through-holes 111 include first terminal through-holes 1111 and second terminal through-holes 1112 arranged sequentially along the third direction Z. Some of the through-holes 111 include first terminal through-holes 1111 and second terminal through-holes 1112 arranged sequentially along the direction opposite to the third direction Z. The first terminal 23 and second terminal 24 of the same battery cell 2 each penetrate the first terminal through-hole 1111 and second terminal through-hole 1112 located in the same group.

[0064] As shown in Figure 10, in one embodiment, the first terminal 23 includes a first terminal connection portion 231 after passing through the first terminal through hole 1111, and the second terminal 24 includes a second terminal connection portion 241 after passing through the second terminal through hole 1112. The first terminal connection portion 231 and the second terminal connection portion 241 are located on the second side 11b of the substrate 11.

[0065] As shown in Figures 11 and 14, in some embodiments, the multiple groups of through holes 111 include a first group of through holes 111a, a second group of through holes 111b, and a third group of through holes 111c located between the first group of through holes 111a and the second group of through holes 111b, where the third group of through holes 111c is divided into at least two groups.

[0066] In one embodiment, the first terminal 23 passes through the first terminal through-hole 1111 of the first group through-hole 111a, and the first terminal connection portion 231 of the first terminal 23 is connected to the first connector 61. The second terminal 24 passes through the second terminal through-hole 1112 of the second group through-hole 111b, and the second terminal connection portion 241 of the second terminal 24 is connected to the second connector 62.

[0067] Along the first direction X, the distance between the first terminal through-hole 1111 of the first group through-hole 111a and the second terminal through-hole 1112 of the adjacent third group through-hole 111c is D1. Of the two adjacent third group through-holes 111c, the second terminal through-hole 1112 of one group and the first terminal through-hole 1111 of the other group are positioned opposite each other along the first direction X, and the distance between them is D3. Since D1 is greater than D3, the distance between the first terminal 23 in the first terminal through-hole 1111 of the first group through-hole 111a and the second terminal 24 in the second terminal through-hole 1112 of the adjacent third group through-hole 111c is increased, reducing the risk of short-circuiting between the first terminal 23 and the second terminal 24, increasing the connectable area, and facilitating the installation of the first connector 61. Furthermore, the risk of a short circuit between the first connector 61 and the second terminal 24 in the through hole 111c of the adjacent third group can be reduced.

[0068] As shown in Figures 16 and 17, in one embodiment, along the first direction X, the distance between the first terminal through-hole 1111 of the first group through-hole 111a and the first terminal through-hole 1111 of the adjacent third group through-hole 111c is D1. Along the first direction X, of the two adjacent third group through-holes 111c, the first terminal through-hole 1111 of one group and the first terminal through-hole 1111 of the other group are positioned opposite each other along the first direction X, and the distance between them is D3.

[0069] In one embodiment, the difference between D1 and D3 is greater than 6 mm, which is advantageous in increasing the connection area between the first connector 61 and the first terminal 23 and strengthening the welding area between the first connector 61 and the first terminal 23.

[0070] In one embodiment, the substrate 11 includes a first side 11A and a first side 11B. To facilitate the outward bending of the first terminal connector 231, which is provided in the first terminal through-hole 1111 of the first group of through-holes 111a, and welding it to the first connector 61, the side of the first terminal through-hole 1111 of the first group of through-holes 111a that is farther from the second group of through-holes 111b penetrates the first side 11B of the substrate 11 along the first direction X.

[0071] The distance between the second terminal through-hole 1112 of the second group through-hole 111b and the first terminal through-hole 1111 of the adjacent third group through-hole 111c is D2, and D2 is smaller than D3. This reduces the distance between the second group through-hole 111b and the adjacent third group through-hole 111c, and allows adjustment of the distance from the first terminal through-hole 1111 of the first group through-hole 111a to the second group through-hole 111b.

[0072] In one embodiment, the substrate 11 includes a first side 11A and a first side 11B. Along the first direction X, the distance from the second terminal through-hole 1112 of the second group of through-holes 111b to the first side 11A of the substrate 11 is d21, and the distance from the first terminal through-hole 1111 of the second group of through-holes 111b to the first side 11A of the substrate 11 is d22, where d21 is greater than d22. This increases the distance between the second terminal through-hole 1112 of the second group of through-holes 111b and the first side 11A of the substrate 11, facilitating welding of the second terminal connector 241 and the second connector 62. Optionally, the range in which d21 exceeds d22 is 2mm-4mm.

[0073] As shown in Figures 6 and 7, the multiple groups of protrusions 12 and the substrate 11 are integrally molded by an injection molding process. The multiple groups of protrusions 12 are provided sequentially at intervals along the first direction X on the first side 11a of the substrate 11, and each extends along the third direction Z on the surface of the substrate 11. Gaps between the multiple groups of protrusions 12 are formed. Viewed from the second direction Y, the through holes 111 are located between two adjacent protrusions 12, the through holes 111 communicate with the gaps, and there is one through hole 111 between any two adjacent protrusions 12.

[0074] When multiple battery cells 2 are arranged in the holder 1 in a stacked manner, each group's through-hole 111 corresponds to one battery cell 2. Specifically, the first terminal 23 and the second terminal 24 of the same battery cell 2 are inserted into the first terminal through-hole 1111 and the second terminal through-hole 1112 of the through-hole 111 of each group. Part of the first terminal 23, part of the second terminal 24, and the edging portion 212 of the battery cell 2 are located between two adjacent protrusions 12. In some embodiments, after the first terminal 23 has passed through the first terminal through-hole 1111 and the second terminal 24 has passed through the second terminal through-hole 1112, the first terminal connection portion 231 of the first terminal 23 and the second terminal connection portion 241 of the second terminal 24 are bent to connect adjacent battery cells 2 in series or parallel. Furthermore, in the direction opposite to the second direction Y, the width of each group's protrusion 12 in the first direction X gradually decreases. Specifically, the cross-sectional shape of the protrusion 12 in the third direction Z is approximately V-shaped, and the V-shaped tip moves away from the substrate 11 along the second direction Y. The width of the gap between two adjacent protrusions 12 in the first direction X is set to gradually decrease along the second direction Y. To understand this, as the first terminal 23 and the second terminal 24 move into the gap between the two protrusions 12, the surface of the protrusion 12 acts as a guide for the movement of the first terminal 23 and the second terminal 24, guiding them closer to the substrate 11 until they move and are inserted into the through hole 111.

[0075] In some embodiments, the minimum distance between two adjacent protrusions 12 is equal to the width of the through hole 111 along the first direction X.

[0076] In one embodiment, when viewed along a second direction Y, the multiple groups of protrusions 12 include a first group of protrusions 121, a second group of protrusions 122, and a third group of protrusions 123. Here, the first group of protrusions 121 is located between the first group of through holes 111a and the adjacent third group of through holes 111c. The second group of protrusions 122 is located between the second group of through holes 111b and the third group of through holes 111c adjacent to the second group of through holes 111b. The third group of protrusions 123 is located between two adjacent third group of through holes 111c, as well as between the first group of protrusions 121 and the second group of protrusions 122.

[0077] Viewed along the second direction Y, the protrusion 121 of the first group includes a first portion 121a and a second portion 121b. The first portion 121a is located between the first terminal through-hole 1111 of the first group through-hole 111a and the second terminal through-hole 1112 of the third group through-hole 111c. Here, the second terminal through-hole 1112 is provided adjacent to the first terminal through-hole 1111 of the first group through-hole 111a, and the second portion 121b is located between the second terminal through-hole 1112 of the first group through-hole 111a and the first terminal through-hole 1111 of the third group through-hole 111c. Here, the first terminal through-hole 1111 of the third group through-hole 111c is provided adjacent to the second terminal through-hole 1112 of the first group through-hole 111a. Along the second direction Y, the width of the projection of the first portion 121a onto the substrate 11 along the first direction X is W1, and the width of the projection of the second portion 121b onto the substrate 11 along the first direction X is W2, where W1 is greater than W2. This contributes to the first terminal 23 of the first portion 121a being farther away from the second terminal 24 in the adjacent third group through-hole 111c along the first direction X, increasing the distance between the first terminal 23 and the second terminal 24 and reducing the risk of the first terminal 23 short-circuiting with the second terminal 24.

[0078] When the first terminal 23 and the second terminal 24 of the same battery cell 2 come into contact with the first portion 121a and the second portion 121b, respectively, the battery cell 2 moves toward the substrate 11 along the second direction Y, and the first portion 121a and the second portion 121b can act as guides, moving the first terminal 23 and the second terminal 24 toward the substrate 11 until they are inserted into the first terminal through hole 1111 and the second terminal through hole 1112, respectively.

[0079] In one embodiment, along the first direction X, the distance from the first portion 121a to the second group of protrusions 122 is equal to the distance from the second portion 121b to the second group of protrusions 122.

[0080] Viewed along the second direction Y, the second group's protrusion 122 includes a third portion 122a located between the second terminal through-hole 1112 of the second group's through-hole 111b and the first terminal through-hole 1111 of the adjacent third group's through-hole 111c, and a fourth portion 122b located between the first terminal through-hole 1111 of the second group's through-hole 111b and the second terminal through-hole 1112 of the adjacent third group's through-hole 111c. Along the second direction Y, the width of the third portion 122a along the first direction X of its projection onto the substrate 11 is W3, and the width of the fourth portion 122b along the first direction X of its projection onto the substrate 11 is W4, where W3 is smaller than W4. This makes it advantageous during the assembly process to guide the second terminal 24, located in the second terminal through-hole 1112 of the second group through-hole 111b, to be installed close to the adjacent third group through-hole 111c, and also makes it possible to make the distance between the first terminal through-hole 1111 of the second group through-hole 111b and the adjacent third group through-hole 111c equal to D3.

[0081] In one embodiment, the difference between D1 and D3 is equal to the difference between D3 and D2. The distance between the first terminal through-hole 1111 of the second group through-hole 111b and the adjacent third group through-hole 111c is equal to D3, and the distance between the second terminal through-hole 1112 of the first group through-hole 111a and the adjacent third group through-hole 111c is equal to D3. As shown in Figure 18, along the first direction X, the distance from the first terminal through-hole 1111 of the first group through-hole 111a to the second group through-hole 111b is d1, and the distance from the second terminal through-hole 1112 of the first group through-hole 111a to the second group through-hole 111b is d2, and d1 is equal to d2. This makes it easy to cut the first terminal 23 so that its length extending from the battery cell case 21 matches the length extending from the second terminal 24, thus facilitating production.

[0082] In one embodiment, the first group of protrusions 121 further includes a fifth portion 121c connected to the first portion 121a and the second portion 121b, respectively. In the second direction Y, the width of the fifth portion 121c along the first direction X of its projection onto the substrate 11 gradually increases from the end connected to the second portion 121b to the end connected to the first portion 121a. The surface of the fifth portion 121c opposite to the second group of protrusions 122 smoothly continues with the surface of the first portion 121a opposite to the second group of protrusions 122, guiding a portion of the structure of the edging 212 from the second portion 121b to the first portion 121a.

[0083] Furthermore, the protrusion 12 further includes a fourth group protrusion 124 and a fifth group protrusion 125. The fourth group protrusion 124 is provided spaced along the first direction X, on the side of the first group protrusion 121 furthest from the third group protrusion 123. The second terminal through-hole 1112 of the first group through-hole 111a is located between the first group protrusion 121 and the fourth group protrusion 124. The fourth group protrusion 124 cooperates with the adjacent first group protrusion 121 to form a gap that guides the second terminal 24. The fifth group protrusion 125 is provided spaced along the first direction X, on the side of the second group protrusion 122 furthest from the third group protrusion 123. The first terminal through-hole 1111 and the second terminal through-hole 1112 of the second group through-hole 111b are located between the second group protrusion 122 and the fifth group protrusion 125. The protrusion 125 of the fifth group works in cooperation with the adjacent protrusion 121 of the first group to form a gap, guiding the first terminal 23 and the second terminal 24. The sides of the protrusion 124 of the fourth group and the protrusion 125 of the fifth group that are closest to the substrate 11 are located in the same plane as the side of the substrate 11 in the second direction Y.

[0084] The substrate 11 further includes a third side 11c and a fourth side 11d provided opposite to each other along the third direction Z. The substrate 11 further includes an opening 11e provided on the third side 11c. Third direction Z Along this line, the opening 11e communicates with the gaps between multiple groups of protrusions 12. The first terminal 23 and the second terminal 24 enter from the opening 11e on the third side 11c of the substrate 11 between two adjacent groups of protrusions 12 along the third direction.

[0085] In one embodiment, the ends of the multiple groups of protrusions 12 located on the third side 11c are provided with a first inclined surface 12a and a second inclined surface 12b. The first inclined surface 12a and the second inclined surface 12b are positioned toward the gap between adjacent protrusions 12. In the first direction X, the distance between the first inclined surface 12a and the second inclined surface 12b of the same group of protrusions 12 gradually increases from the third side 11c to the fourth side 11d. That is, the distance between the first inclined surface 12a and the second inclined surface 12b of the adjacent protrusion 12 along the first direction X is set to gradually decrease from the third side 11c to the fourth side 11d. As a result, the opening 11e expands, allowing the first terminal 23 and the second terminal 24 to be easily guided into the gap between two adjacent groups of protrusions 12, thereby increasing the success rate of the abutting between the battery cell 2 and the holder 1.

[0086] Furthermore, the fourth side 11d An opening 11e and a corresponding slope may be provided to guide the first terminal 23 and the second terminal 24 into the gap between the two groups of protrusions 12.

[0087] Furthermore, when the holder 1 is inserted into the first terminal 23 and the second terminal 24, the first terminal 23 and the second terminal 24 first enter between the two adjacent protrusions 12 from the opening 11e on the third side 11c along the third direction Z, and then the first terminal 23 and the second terminal 24 continue to move along the second direction Y. During movement, the width of the gap between the two adjacent protrusions 12 in the first direction X gradually decreases along the second direction Y, and the first terminal 23 and the second terminal 24 are guided to move to predetermined positions along the first direction X and the second direction Y. After that, the first terminal 23 is inserted into the through hole 1111 for the first terminal and the second terminal 24 is inserted through the through hole 1112 for the second terminal along the second direction Y. During the process of moving along the second direction Y, the outer surface of the protrusion 12 guides the first terminal 23 and the second terminal 24 to the position of the through hole 111, thereby increasing the success rate of insertion.

[0088] The holder 1 further includes a partition 13. The partition 13 is located between the first terminal through-hole 1111 and the second terminal through-hole 1112 in the same group of through-holes 111. When the first terminal 23 and the second terminal 24 of the battery cell 2 are inserted into the first terminal through-hole 1111 and the second terminal through-hole 1112, respectively, the partition 13 is located between the first terminal connection part 231 and the second terminal connection part 241. The partition 13 also reduces the probability of other foreign objects falling between the first terminal through-hole 1111 and the second terminal through-hole 1112 in the same group, and further reduces the risk of the first terminal 23 and the second terminal 24 being short-circuited by these foreign objects. The partition 13 can also increase the structural strength of the holder 1.

[0089] As shown in Figures 9 and 10, the first terminal 23 and the second terminal 24 pass through the through hole 111 and are then bent to face each other and connect. By bending, multiple battery cells 2 can be connected in series or parallel.

[0090] Furthermore, along the first direction X, the first terminal 23 of one of the two outermost battery cells 2 and the second terminal 24 of the other battery cell 2 are not connected in series with the adjacent battery cell 2. These first terminal 23 and second terminal 24 may be electrically connected to an external device as the output terminals of this series circuit.

[0091] In this application, "outside" refers to the side away from the center of the stack. The two outermost battery cells 2 refer to the two battery cells 2 located at both ends in the first direction X of the stacked battery cells 2.

[0092] As shown in Figures 11 and 12, the aforementioned battery module 100 further comprises a conductive member 4 and a sampling member 5. The conductive member 4 and the sampling member 5 are provided on the second side 11b of the substrate 11.

[0093] When viewed from a direction opposite to the second direction Y, the conductive member 4 is provided between the first terminal through-hole 1111 and the second terminal through-hole 1112, which are adjacent to each other along the first direction X. The first terminal connection portion 231 and the second terminal connection portion 241 are connected to the conductive member 4. Along the first direction X, the lengths of the conductive member 4 are the same. This ensures that the welding area between the first terminal connection portion 231, the second terminal connection portion 241 and the conductive member 4 between adjacent battery cells 2 is the same, which is advantageous in maintaining the consistency of the battery cells 2 and improving the service life of the battery module 100. When adjacent first terminals 23 and second terminals 24 are bent toward each other along the first direction X, the bent second terminal 24 is positioned downwards, and the aforementioned second terminal 24 abuts against the conductive member 4 and is electrically connected, and the aforementioned first terminal 23 abuts against the second terminal 24 and is electrically connected.

[0094] Furthermore, when the bent first terminal 23 is positioned below the second terminal 24, the first terminal 23 contacts the conductive member 4 and is electrically connected, and the second terminal 24 contacts the first terminal 23 and is electrically connected.

[0095] One end of the sampling member 5 is connected to the substrate 11 and electrically connected to all conductive members 4, while the other end of the sampling member 5 extends from the substrate 11. The sampling member 5 electrically connects multiple conductive members 4 to all battery cells 2 so that it can collect and transmit data information from the safety circuit boards in all battery cells 2.

[0096] In this invention, the conductive member 4 and the sampling member 5 are pre-installed in the holder 1, and the sampling member 5 is welded to the conductive member 4. When the first terminal 23 and the second terminal 24 of the battery cell 2 are inserted through the through hole 111 and connected to the holder 1, the sampling member 5 can connect all of the battery cells 2, thereby improving work efficiency.

[0097] In some embodiments, the sampling member 5 includes a sampling line.

[0098] In some embodiments, the conductive member 4 includes a metallic material.

[0099] As shown in Figures 13 and 14, the two outermost battery cells 2 are the first battery cell 81 and the second battery cell 82, respectively. The second terminal 24 of the first battery cell 81 is not connected to the first terminal 23 of the adjacent battery cell 2, and the first terminal 23 of the second battery cell 82 is not connected to the second terminal 24 of the adjacent battery cell 2.

[0100] One end of the first connector 61 is connected to the first terminal connector 231 of the first terminal 23 of the first battery cell 81, and the other end of the first connector 61 protrudes from the outside of the first battery cell 81 to the outside of the holder 1. One end of the second connector 62 is electrically connected to the second terminal connector 241 of the second terminal 24 of the second battery cell 82, and the other end of the second connector 62 protrudes from the outside of the second battery cell 82 to the outside of the holder 1.

[0101] The first connector 61 has a first connection portion 611 at the end furthest from the first battery cell 81, and the second connector 62 has a second connection portion 621 at the end furthest from the second battery cell 82. The first connection portion 611 and the second connection portion 621 extend from the same side of the stacked battery cells 2 and from the same side as the sampling member 5. For ease of understanding, since the first connection portion 611, the second connection portion 621 and the sampling member 5 are drawn out from the same side, connection to an external device is made easier and space utilization is increased. In other embodiments, the first connection portion 611 and the second connection portion 621 are provided on different sides of the holder 1.

[0102] In some embodiments, the holder 1 is further provided with a first insulating column 14 and a second insulating column 15. The first insulating column 14 and the second insulating column 15 are provided on the second side 11b of the substrate 11.

[0103] One end of the first insulating column 14 is fixedly connected to the substrate 11, and the other end of the first insulating column 14 is in contact with the first connector 61, and the first connector 61 is electrically connected to the bent first terminal 23, thereby reducing the probability of a short circuit occurring. In some embodiments, there are multiple first insulating columns 14, and all of the multiple first insulating columns 14 are located on the surface of the substrate 11. Furthermore, the multiple first insulating columns 14 can better support the first connector 61, reducing the probability of the first connector 61 coming into contact with the bent first terminal 23 and second terminal 24 and causing a short circuit.

[0104] One end of the second insulating column 15 is fixedly connected to the substrate 11, and the other end of the second insulating column 15 abuts against the side and bottom surfaces of the first connector 61. The second insulating column 15 has a support surface and a contact surface; the support surface abuts against the side of the first connector 61 closer to the substrate 11, and the contact surface abuts against the side surface of the first connector 61. In some embodiments, there are multiple second insulating columns 15, each provided on both sides of the first connector 61 along the second direction Y. In addition, the multiple second insulating columns 15 not only support the first connector 61 and reduce the risk of the first connector 61 coming into contact with the bent first terminals 23 and 24 and causing a short circuit, but can also serve as a positional restraint, limiting the displacement of the first connector 61 in the second direction Y.

[0105] The holder 1 is further provided with an insulating block 16. The insulating block 16 is provided on the second side 11b of the substrate 11 and is located between the first terminal through hole 1111 of the first group through hole 111a and the adjacent third group through hole 111c. The length of the insulating block 16 along the third direction Z is greater than the length of the through holes 1111 on both sides of the insulating block 16 along the third direction Z. Moreover, the insulating block 16 protrudes from the substrate 11 along the second direction Y, supports the first connector 61, and also isolates the first connector 61 and prevents the first terminal 23 soldered to the first connector 61 from contacting the adjacent second terminal 24, thereby reducing the risk of a short circuit between the first connector 61 and the second terminal 24 in the third group through hole 111c.

[0106] In some embodiments, the first connector 61 and the second connector 62 are made of metal.

[0107] In some embodiments, the first insulating column 14 and the second insulating column 15 are made of insulating material.

[0108] As shown in Figures 1 and 2, the aforementioned battery module 100 further includes a first filler 71 and a second filler 72.

[0109] The first filler material 71 is filled between two opposing first surfaces 2111. Moreover, both ends of the first filler material 71 are in contact with the two first surfaces 2111. Furthermore, the first filler material 71 reduces the risk of short-circuiting between the two battery cells 2 where the two first surfaces 2111 are located by limiting contact between the two opposing first surfaces 2111.

[0110] The second filler material 72 is provided between the housing 3 and the stacked battery cells 2. Furthermore, the second filler material 72 can reduce the risk of the battery cells 2 shaking inside the packaged battery module 100.

[0111] In some embodiments, the first filler 71 and the second filler 72 are foamed cotton.

[0112] In some embodiments, the second housing 32 is provided with a third through hole 321, a fourth through hole 322, and a fifth through hole 323. The third through hole 321 corresponds to the first connection portion 611, the fourth through hole 322 corresponds to the second connection portion 621, and the third through hole 321 and the fourth through hole 322 are capable of allowing the first connection portion 611 and the second connection portion 621 to pass through, respectively. The fifth through hole 323 corresponds to the sampling member 5, and Sampling member 5 Penetration can be permitted.

[0113] The first connection part 611, the second connection part 621, and the sampling member 5 protrude from the second housing 32 through the third through hole 321, the fourth through hole 322, and the fifth through hole 323, respectively, and can be connected to external equipment, enabling the transfer of electrical energy from the stacked battery cells 2 and digital information from the safety circuit boards of all battery cells 2 to the outside.

[0114] As shown in Figure 11, in this embodiment, there is an even number of battery cells 2, and the first terminal through-hole 1111 of the first group through-hole 111a and the second terminal through-hole 1112 of the second group through-hole 111b are arranged to face each other along the first direction X. Along the first direction X, the projection of the first terminal through-hole 1111 overlaps at least partially with the projection of the second terminal through-hole 1112. As shown in Figure 18, in another embodiment, there is an odd number of battery cells 2, and the first terminal through-hole 1111 of the first group through-hole 111a and the first terminal through-hole 1111 of the second group through-hole 111b are arranged to face each other along the first direction X.

[0115] As shown in Figure 11, in this embodiment, multiple battery cells 2 are connected in series, and between multiple adjacent groups of through holes 111c, a first terminal through hole 1111 and a second terminal through hole 1112 are provided facing each other along the first direction X. Along the first direction X, the projection of the first terminal through hole 1111 and the projection of the second terminal through hole 1112 overlap at least partially.

[0116] In other embodiments, a first terminal through-hole 1111 and a second terminal through-hole 1112 are provided separately along a first direction X between multiple adjacent groups of through-holes 111c. Along the first direction X, the projection of the first terminal through-hole 1111 is separated from the projection of the second terminal through-hole 1112.

[0117] As shown in Figure 15, the present application also provides an electrical equipment 200 using a battery module 100 according to any of the above embodiments, which can be used by connecting the battery module 100 via a circuit. In one embodiment, the electrical equipment 200 of the present application can be, but is not limited to, a pen-input computer, a mobile computer, a portable facsimile, a portable copier, a portable printer, a headset stereo headphones, a video camera, an LCD television, a hand cleaner, a transceiver, an electronic organizer, a calculator, a backup power supply, a motor, an electric vehicle, an electric motorcycle, an electric assist bicycle, a power tool, or a large household storage battery.

[0118] As described above, the battery module 100 and electrical equipment 200 of the present invention are arranged such that, along the third direction Z, the first terminal 23 and the second terminal 24 are first guided from the side between two adjacent protrusions 12, and the width of the gap between the two adjacent protrusions 12 in the first direction X gradually decreases along the second direction Y, thereby guiding the first terminal 23 and the second terminal 24 to pass through the through hole 111 along the first direction X and the second direction Y, thereby improving assembly efficiency. The ends of the multiple groups of protrusions 12 are provided with a first inclined surface 12a and a second inclined surface 12b. In the first direction X, the distance between the first inclined surface 12a and the second inclined surface 12b gradually increases from the third side 11c to the fourth side 11d, making it easy to guide the first terminal 23 and the second terminal 24 into the gap between two adjacent groups of protrusions 12, and increasing the success rate when the battery cell 2 and the holder 1 are butted together. The protrusion 12 can be positioned between the adjacent first terminal 23 and second terminal 24 and serve as a barrier. By increasing the distance between the first terminal through-hole 1111 of the first group through-hole 111a and the second terminal through-hole 1112 of the adjacent third group through-hole 111c, the distance between the first terminal connector 231 connected to the first connector 61 and the adjacent second terminal connector 241 can be increased, thereby reducing the risk of short circuits due to the pitch between the first terminal connector 231 and the second terminal connector 241 being too small.

[0119] Furthermore, a person skilled in the art may make other modifications within the spirit of the present application, but of course, any modifications made based on this spirit should fall within the scope disclosed by the present application. [Explanation of Symbols]

[0120] 100 Battery Modules 1 holder 11 circuit boards 11a 1st side 11b Second side 11a 1st side 11b 2nd side 11c 3rd side 11d Fourth side 11e aperture 111 Through hole 111a Through hole of the first group 111b Through holes of the second group 111c Through hole of the third group 1111 Through hole for first terminal 1112 Through hole for second terminal 12 Convex part 12a First Slope 12b Second slope 121 Convex part of the first group 121a Part 1 121b Part 2 122 Convex part of the second group 122a 3rd part 122b Part 4 121c Part 5 123 The protruding part of the third group 124 Convex part of the 4th group 125 The protruding part of the 5th group 13 Partition 14. First insulating column 15. Second insulating column 16 Insulating Block 2 battery cells 21 Battery cell case 21a 1st area 21b Second area 211a 1st space 211 Storage Unit 2111 Page 1 2112 2nd page 212 Border 22 Electrode Assembly 23 1st terminal 24 2nd terminal 3 Housing 31 Case 1 32 Case 2 321 Third through hole 322 Fourth through hole 323 Fifth through hole 4. Conductive members 5 Sampling Member 61 First connector 611 First connection section 62 Second connector 621 Second connection section 71 1st filler 72 Second filler 81. First battery cell 82 Second battery cell X 1st direction Y Second direction Z 3rd direction

Claims

1. A battery module comprising multiple battery cells and a holder, The plurality of battery cells are arranged in a stack along a first direction, and each of the battery cells includes a first terminal and a second terminal, the polarities of the first terminal and the second terminal are opposite. The holder includes through holes in multiple groups, each group of through holes including a through hole for a first terminal and a through hole for a second terminal, and the first terminal and the second terminal of the same battery cell are inserted through the first terminal through hole and the second terminal through hole of the same group, The aforementioned multiple groups of through holes include a first group of through holes, a second group of through holes, and a third group of through holes located between the first group of through holes and the second group of through holes. Here, along the first direction, the distance D1 between the first terminal through-hole of the first group and the second terminal through-hole of the adjacent third group is greater than the distance D3 between adjacent through-holes of the third group. The holder includes a plurality of groups of protrusions provided at intervals, and each of the plurality of groups of protrusions is located between adjacent first terminals and second terminals. The holder further includes a substrate, The substrate includes a first side and a second side that are opposite each other in the first direction, the through holes of the second group are located close to the first side, and the through holes of the first group are located close to the second side. A battery module characterized in that the distance from the second terminal through-hole to the first side of the through-hole of the second group is d21, the distance from the first terminal through-hole to the first side of the through-hole of the second group is d22, and d21 is greater than d22.

2. Of the two adjacent through holes of the third group, the distance between the through hole for the first terminal in one of the third group through holes and the through hole for the second terminal in the other third group through hole is the distance D3. The battery module according to claim 1, characterized in that the through-hole for the first terminal of one of the through-holes of the third group and the through-hole for the second terminal of the other through-hole of the third group are provided to face each other along the first direction.

3. The battery module according to claim 1, characterized in that the difference between the distance D1 and the distance D3 is greater than 6 mm.

4. The battery module according to claim 1, characterized in that the distance D2 between the second terminal through-hole of the second group of through-holes and the first terminal through-hole of the third group of through-holes adjacent thereto is smaller than the distance D3.

5. The battery module according to claim 1, characterized in that, along the first direction, the distance d1 from the first terminal through-hole of the first group of through-holes to the second terminal through-hole of the second group of through-holes is equal to the distance d2 from the second terminal through-hole of the first group of through-holes to the first terminal through-hole of the second group of through-holes.

6. The substrate includes a first side and a second side that are arranged opposite to each other along the second direction, The multiple groups of protrusions are located on the first side of the substrate, Viewed along the second direction, the multiple groups of protrusions include a first group of protrusions located between the first group of through holes and the third group of through holes adjacent thereto, a second group of protrusions located between the second group of through holes and the third group of through holes adjacent thereto, and a third group of protrusions located between the first group of protrusions and the second group of protrusions. The protrusion of the first group includes a first portion located between the first terminal through-hole of the first group and the second terminal through-hole of the adjacent third group through-hole, and a second portion located between the second terminal through-hole of the first group through-hole and the first terminal through-hole of the adjacent third group through-hole. The battery module according to claim 1, characterized in that, along the second direction, the width of the projection of the first portion onto the substrate along the first direction is W1, the width of the projection of the second portion onto the substrate along the first direction is W2, and W1 is greater than W2.

7. The battery module according to claim 6, characterized in that, along the first direction, the distance from one side of the first portion connected to the protrusion of the third group to one side of the second group connected to the protrusion of the third group is equal to the distance from one side of the second portion connected to the protrusion of the third group to one side of the second group connected to the protrusion of the third group.

8. The battery module according to claim 6, characterized in that the protrusions in each group gradually decrease in size along the direction opposite to the second direction.

9. Viewed along the second direction, the protrusion of the second group includes a third portion located between the second terminal through-hole of the second group and the first terminal through-hole of the adjacent third group through-hole, and a fourth portion located between the first terminal through-hole of the second group through-hole and the second terminal through-hole of the adjacent third group through-hole. The battery module according to claim 6, characterized in that, along the second direction, the width of the projection of the third portion onto the substrate along the first direction is W3, and the width of the projection of the fourth portion onto the substrate along the first direction is W4, and W3 is smaller than W4.

10. The battery module according to claim 6, characterized in that the through-hole for the first terminal in the through-hole of the first group is formed as a notch that is recessed toward the first side along the first direction on the second side.

11. The holder includes a third side and a fourth side arranged opposite to each other along a third direction, and includes an opening located on the third side. The battery module according to claim 6, characterized in that gaps between the multiple groups of protrusions are formed between the multiple groups, and the opening communicates with the gaps between the multiple groups along the third direction.

12. The battery module according to claim 11, wherein the ends of the multiple groups of protrusions located on the third side are provided with a first inclined surface and a second inclined surface, and the distance between the first inclined surface and the second inclined surface of the same group of protrusions along the third direction gradually increases.

13. The battery cell further includes a battery cell case and an electrode assembly, The battery cell case includes a housing portion and a rim portion extending outward from the housing portion. The housing portion includes a first surface and a second surface arranged to face each other along the first direction, The first terminal and the second terminal protrude from the edging portion to the outside of the battery cell case. The battery module according to claim 1, characterized in that the electrode assembly is housed in the housing, and the first terminal and the second terminal are electrically connected to the electrode assembly.

14. The battery module according to claim 13, characterized in that the edging portion is provided between the plane on which the first surface is located and the plane on which the second surface is located, and is closer to the first surface.

15. The first terminal and the second terminal, which are connected to each other, are bent and connected so that they face each other, the first terminal includes a first terminal connection portion that passes through the first terminal through hole, and the second terminal includes a second terminal connection portion that passes through the second terminal through hole. The battery module further includes a plurality of conductive members, the plurality of conductive members being provided on the side of the substrate opposite to the protrusion, The first terminal connection portion and the second terminal connection portion are connected to the conductive member, The battery module according to claim 6, wherein the holder further includes a partition located on the first side of the substrate, and the partition is provided between the first terminal through-hole and the second terminal through-hole of the same group of through-holes.

16. The battery module according to claim 15, further comprising a sampling member, wherein the sampling member is positioned on the opposite side of the substrate from the protrusion and connected to the conductive member.

17. The battery module further includes a first connector and a second connector, One end of the first connector is connected to the first terminal which passes through the first terminal through hole of the first group, and the other end of the first connector has a first connecting portion. One end of the second connector is connected to the second terminal which passes through the through hole for the second terminal of the through hole of the second group, and the other end of the second connector has a second connecting portion. The battery module according to claim 11, characterized in that the first connection portion and the second connection portion are located on the same side of the substrate along the first direction.

18. The holder further includes an insulating block, The insulating block is provided on the second side of the substrate and is located between the first terminal through-hole of the first group and the adjacent through-hole of the third group. The battery module according to claim 17, characterized in that, along the third direction, the length of the insulating block is longer than the length of the through-hole for the first terminal of the through-hole of the first group.

19. An electrical equipment characterized by comprising a battery module according to any one of claims 1 to 18.

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