Series-parallel battery module

Abstract

The application provides a series-parallel battery module. The series-parallel battery module comprises a series-parallel claw, the series-parallel claw comprises a cover parallel piece, a first pole connecting piece and a second pole connecting piece, the first end of the first pole connecting piece is bent to form the first end of the cover parallel piece, the first pole connecting piece is parallel to the cover parallel piece and has a height difference. The first end of the second pole connecting piece is bent to the side of the cover parallel piece, the second pole connecting piece is parallel to the first pole connecting piece and is in the same plane, the second pole connecting piece and the first pole connecting piece are protruded to the same side of the cover parallel piece, the second pole connecting piece is located between the two ends of the cover parallel piece, and there is an included angle between any two of the cover parallel piece, the first pole connecting piece and the second pole connecting piece. In this way, the series-parallel claw is used for series-parallel connection of a plurality of cylindrical batteries, and the compactness of the structure of the series-parallel battery module is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of series-parallel battery modules, and in particular to a series-parallel battery module. Background Art

[0002] The series-parallel battery module includes multiple cylindrical batteries, which are connected in series and parallel through multiple connecting plates. There are two main types of cylindrical batteries. One is a cylindrical battery with positive and negative poles at both ends, and the other is a cylindrical battery with positive and negative poles at the same end. The pole of the cylindrical battery is one of the positive and negative poles, and the cover of the cylindrical battery is the other of the positive and negative poles. For example, a new cylindrical lithium battery structure is disclosed in document number CN115377480A.

[0003] For the series-parallel battery module using cylindrical batteries with the positive and negative electrodes at the same end, it is limited by the structure of the connecting piece, such as Figure 1 As shown, the series-parallel battery module is provided with multiple columns of battery packs spaced apart along a first direction, each column of battery packs includes multiple cylindrical batteries spaced apart and arranged side by side along a second direction, and the first direction is perpendicular to the second direction.

[0004] However, the gap between two adjacent cylindrical batteries is not consistent, and there is a case where the gap between two adjacent cylindrical batteries is large, for example, Figure 1 As shown, the gap between cylindrical battery a and cylindrical battery b is larger than the gap between cylindrical battery a and cylindrical battery c, resulting in the inability to keep the gap between any two adjacent cylindrical batteries small, making the space utilization of the series-parallel battery module poor, resulting in poor structural compactness of the series-parallel battery module. Summary of the Invention

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a series-parallel battery module with a more compact structure.

[0006] The object of the present invention is achieved through the following technical solutions:

[0007] A series-parallel battery module includes a series-parallel claw, wherein the series-parallel claw includes:

[0008] Cover plate parallel piece;

[0009] a first pole connecting piece, wherein a first end of the first pole connecting piece is bent and formed at a first end of the cover plate parallel piece, the first pole connecting piece is parallel to the cover plate parallel piece and has a height difference therebetween; and

[0010] A second pole connecting piece, wherein the first end of the second pole connecting piece is bent at a side of the cover plate parallel piece, the second pole connecting piece is parallel to the first pole connecting piece and is on the same plane, the second pole connecting piece and the first pole connecting piece are both protrudingly provided on the same side of the cover plate parallel piece, the second pole connecting piece is located between the two ends of the cover plate parallel piece, and an angle exists between any two of the cover plate parallel piece, the first pole connecting piece, and the second pole connecting piece;

[0011] The series-parallel battery module further includes two first battery groups spaced apart along the first direction, each first battery group includes a plurality of first cylindrical batteries spaced apart along the second direction, the plurality of first cylindrical batteries of the two first battery groups are arranged in one-to-one correspondence, each first cylindrical battery of each first battery group and the corresponding first cylindrical battery together form a battery arrangement group, so that the two first battery groups together form a plurality of side-by-side battery arrangement groups, two adjacent battery arrangement groups together form a cylindrical battery group, so that the plurality of battery arrangement groups together form a plurality of cylindrical battery groups, and the line connecting the centers of any three adjacent first cylindrical batteries forms an equilateral triangle;

[0012] There are multiple series-parallel claws, and the multiple series-parallel claws are arranged at intervals along the second direction and at the same angle. The multiple cylindrical battery packs are arranged in a one-to-one correspondence with the multiple series-parallel claws. The two ends of the cover parallel piece of each series-parallel claw are respectively connected to the cover plates of the two first cylindrical batteries of the corresponding cylindrical battery pack, and the first pole connecting piece and the corresponding second pole connecting piece of each series-parallel claw are respectively connected to the poles of the other two first cylindrical batteries of the corresponding cylindrical battery pack.

[0013] In one embodiment, a cover plate parallel piece of each of the series-parallel claws is provided with an avoidance notch, and the avoidance notch of the cover plate parallel piece of each of the series-parallel claws is used to avoid the corresponding pole support of the first cylindrical battery.

[0014] In one embodiment, the avoidance notch of the cover parallel piece of each of the series-parallel claws is arc-shaped.

[0015] In one embodiment, the second end of the first pole connecting piece of each series-parallel claw is circular; and / or,

[0016] The second end of the second pole connecting piece of each of the series-parallel claws is circular.

[0017] In one embodiment, there is an edge battery group among the multiple parallel battery arrangement groups, and the series-parallel battery module further includes a second parallel claw, and the two ends of the second parallel claw are respectively connected to the poles of the two first cylindrical batteries in the edge battery group.

[0018] In one embodiment, the number of the battery arrangement groups is at least three, and the number of the battery arrangement groups is an odd number; the series-parallel battery module further includes:

[0019] a plurality of second battery groups spaced apart along the second direction, each second battery group comprising two second cylindrical batteries spaced apart along the second direction; the two first battery groups being a side battery group and a middle battery group, the middle battery group being located between the side battery group and the second battery group; an alignment notch being formed between the cover parallel piece of each series-parallel claw and the corresponding second pole connecting piece; the alignment notches of the plurality of series-parallel claws being respectively arranged opposite to the plurality of second cylindrical batteries; the center of each second cylindrical battery and a line connecting the centers of its two adjacent first cylindrical batteries forming an equilateral triangle;

[0020] a plurality of pole parallel claws, provided in one-to-one correspondence with the plurality of second battery packs, wherein both ends of each pole parallel claw are respectively connected to the poles of the two second cylindrical batteries of the corresponding second battery pack; and

[0021] A plurality of series-parallel plates are arranged in a one-to-one correspondence with the plurality of second battery groups, and each of the series-parallel plates is respectively connected to the cover plates of the two second cylindrical batteries of the corresponding second battery group, so that the two second cylindrical batteries of each second battery group are connected in parallel; wherein, the series-parallel plate adjacent to the second parallel claw is a first series-parallel plate, and the first end of the first series-parallel plate is connected to the second parallel claw, and the remaining series-parallel plates are second series-parallel plates, and the first end of each second series-parallel plate is connected to the adjacent pole parallel claw, so that the plurality of second battery groups and the plurality of battery arrangement groups are connected in series in sequence.

[0022] In one embodiment, the battery arrangement group away from the second parallel claw is a positioning battery group, the two first cylindrical batteries of the positioning battery group are both positioning batteries, and the series-parallel battery module further includes:

[0023] a third battery pack located on a side of the positioning battery pack away from the second parallel claw, the third battery pack comprising two third cylindrical batteries spaced apart along the first direction, wherein a line connecting the center of the positioning battery adjacent to the second cylindrical battery and the centers of the two third cylindrical batteries forms an equilateral triangle; and

[0024] The electrical connection claws are respectively connected to the cover plates of the two positioning batteries, and the electrical connection claws are also respectively connected to the poles of the two third cylindrical batteries.

[0025] In one embodiment, the electrical connection claw comprises:

[0026] A cover plate contact piece, the two ends of which are respectively connected to the two cover plates of the positioning battery;

[0027] a first pole contact piece, wherein a first end of the first pole contact piece is bent and formed at a first end of the cover contact piece, and the first pole contact piece is parallel to the cover contact piece and has a height difference; and

[0028] A second pole contact piece, wherein the first end of the second pole contact piece is bent at the side of the cover contact piece, the second pole contact piece is parallel to the first pole contact piece and is on the same plane, the second pole contact piece and the first pole contact piece are both protruding on the same side of the cover contact piece, the second pole contact piece is located between the two ends of the cover contact piece, and there is an angle between any two of the cover contact piece, the first pole contact piece and the second pole contact piece, and the first pole contact piece and the second pole contact piece are respectively connected to the poles of the two third cylindrical batteries.

[0029] In one embodiment, the series-parallel battery module further includes an insulating colloid, the insulating colloid covering and connecting to the surface of each of the first cylindrical batteries; and / or,

[0030] The gap between adjacent first cylindrical batteries is 0.3 mm to 1 mm.

[0031] A glue injection method is provided for performing a glue injection operation on the series-parallel battery module described in any of the above embodiments.

[0032] Compared with the prior art, the present invention has at least the following advantages:

[0033] Each cylindrical battery pack is provided with a corresponding series-parallel claw, that is, multiple series-parallel claws are provided in a one-to-one correspondence with multiple cylindrical battery packs. Each cylindrical battery pack includes four first cylindrical batteries. The line connecting the centers of any three adjacent first cylindrical batteries forms an equilateral triangle, so that the gap between any two adjacent first cylindrical batteries is the same, so that the gap between any two adjacent first cylindrical batteries can be kept small, improving the space utilization of the series-parallel battery module and thereby improving the structural compactness of the series-parallel battery module. Because the two ends of the cover plate parallel plate of each series-parallel claw are respectively connected to the cover plates of the two first cylindrical batteries of the corresponding cylindrical battery pack, and the first pole connecting plate and the corresponding second pole connecting plate of each series-parallel claw are respectively connected to the poles of the other two first cylindrical batteries of the corresponding cylindrical battery pack, multiple first cylindrical batteries are connected in series and parallel. That is, while maintaining a high structural compactness of the series-parallel battery module, multiple series-parallel claws can connect multiple first cylindrical batteries in series and parallel, thereby improving the structural compactness of the series-parallel battery module. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0035] Figure 1 It is a structural diagram of an existing series-parallel battery module;

[0036] Figure 2a This is a schematic structural diagram of a series-parallel claw according to an embodiment;

[0037] Figure 2b for Figure 2a The structural diagram of the series-parallel claws shown in another perspective;

[0038] Figure 3 for Figure 2a The diagram of the serial and parallel claws in use shown;

[0039] Figure 4a This is a structural diagram of a series-parallel battery module according to an embodiment;

[0040] Figure 4b for Figure 4a The structural diagram of the series-parallel battery module shown in another perspective;

[0041] Figure 5 for Figure 4a The partial structural diagram of the series-parallel battery module shown;

[0042] Figure 6a is a structural diagram of a series-parallel battery module shown in another embodiment;

[0043] Figure 6b for Figure 6a The structural diagram of the series-parallel battery module shown in another perspective;

[0044] Figure 7 for Figure 6a The partial structural diagram of the series-parallel battery module shown;

[0045] Figure 8 for Figure 6a Another partial structural diagram of the series-parallel battery module shown;

[0046] Figure 9 for Figure 6a A schematic structural diagram of the electrical connection claws of the series-parallel battery module shown;

[0047] Figure 10 Schematic diagram of the structure of series-parallel claws in another embodiment. DETAILED DESCRIPTION

[0048] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the accompanying drawings. The accompanying drawings illustrate preferred embodiments of the present invention. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide the reader with a more thorough and comprehensive understanding of the present disclosure.

[0049] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly attached to the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0050] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used in this specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0051] The present application provides a series-parallel claw for connecting a cylindrical battery pack, wherein the cylindrical battery pack includes four first cylindrical batteries, and the line connecting the centers of any three adjacent first cylindrical batteries forms an equilateral triangle. The series-parallel claw includes a cover plate parallel piece, a first pole connecting piece, and a second pole connecting piece, wherein the ends of the cover plate parallel piece are respectively used to connect to the cover plates of two of the first cylindrical batteries. The first end of the first pole connecting piece is bent to form the first end of the cover plate parallel piece, and the first pole connecting piece is parallel to the cover plate parallel piece and has a height difference. The first end of the second pole connecting piece is bent at the side of the cover plate parallel piece, the second pole connecting piece is parallel to the first pole connecting piece and is on the same plane, the second pole connecting piece and the first pole connecting piece are both protruding on the same side of the cover plate parallel piece, the second pole connecting piece is located between the two ends of the cover plate parallel piece, and there is an angle between any two of the cover plate parallel piece, the first pole connecting piece and the second pole connecting piece, and the first pole connecting piece and the second pole connecting piece are respectively used to connect to the poles of the other two first cylindrical batteries.

[0052] The above-mentioned series-parallel claws are used to connect a cylindrical battery pack, which includes four first cylindrical batteries. The line connecting the centers of any three adjacent first cylindrical batteries forms an equilateral triangle, so that the gap between any two adjacent first cylindrical batteries is the same, so that the gap between any two adjacent first cylindrical batteries can be kept small, thereby improving the space utilization of the cylindrical battery pack and thereby improving the structural compactness of the cylindrical battery pack; since there is an angle between any two of the cover parallel piece, the first pole connecting piece and the second pole connecting piece, the two ends of the cover parallel piece can be respectively connected to the cover plates of two of the first cylindrical batteries, and the first pole connecting piece and the second pole connecting piece can be respectively connected to the poles of the other two first cylindrical batteries. That is, while maintaining a high structural compactness of the cylindrical battery pack, the series-parallel claws can connect the four first cylindrical batteries of the cylindrical battery pack, thereby improving the structural compactness of the cylindrical battery pack; and because the series-parallel battery module includes multiple side-by-side cylindrical battery packs, the series-parallel battery module is connected using the series-parallel claws to improve the structural compactness, that is, the series-parallel claws can improve the structural compactness of the series-parallel battery module.

[0053] The present application also provides a series-parallel battery module, comprising a plurality of series-parallel claws, the plurality of series-parallel claws being spaced apart along a first direction and arranged at the same angle. The series-parallel battery module further comprises two first battery groups spaced apart along the first direction, each first battery group comprising a plurality of first cylindrical batteries spaced apart along a second direction, the plurality of first cylindrical batteries of the two first battery groups being arranged in a one-to-one correspondence, each first cylindrical battery of each first battery group and the corresponding first cylindrical battery together forming a battery arrangement group, so that the two first battery groups together form a plurality of side-by-side battery arrangement groups, two adjacent battery arrangement groups together form a cylindrical battery group, and the plurality of battery arrangement groups together form a plurality of cylindrical battery groups. The plurality of cylindrical battery groups are arranged in a one-to-one correspondence with the plurality of series-parallel claws, the two ends of the cover plate parallel plate of each series-parallel claw being respectively connected to the cover plates of the two first cylindrical batteries of the corresponding cylindrical battery group, and the first pole connecting plate and the corresponding second pole connecting plate of each series-parallel claw being respectively connected to the poles of the other two first cylindrical batteries of the corresponding cylindrical battery group.

[0054] In the aforementioned series-parallel battery module, each cylindrical battery pack is provided with a corresponding series-parallel claw, that is, multiple series-parallel claws are provided in a one-to-one correspondence with multiple cylindrical battery packs. Each cylindrical battery pack includes four first cylindrical batteries, and the line connecting the centers of any three adjacent first cylindrical batteries forms an equilateral triangle, so that the gap between any two adjacent first cylindrical batteries is the same, so that the gap between any two adjacent first cylindrical batteries can be kept small, thereby improving the space utilization of the series-parallel battery module and thereby improving the structural compactness of the series-parallel battery module. Because the two ends of the cover plate paralleling piece of each series-parallel claw are respectively connected to the cover plates of the two first cylindrical batteries of the corresponding cylindrical battery pack, and the first pole connecting piece and the corresponding second pole connecting piece of each series-parallel claw are respectively connected to the poles of the other two first cylindrical batteries of the corresponding cylindrical battery pack, multiple first cylindrical batteries are connected in series and parallel. In other words, while maintaining a high structural compactness of the series-parallel battery module, multiple series-parallel claws can connect multiple first cylindrical batteries in series and parallel, thereby improving the structural compactness of the series-parallel battery module.

[0055] To better understand the technical solutions and beneficial effects of the present application, the present application is further described in detail below with reference to specific embodiments:

[0056] As shown in FIG2 , a series-parallel claw 100 according to one embodiment includes a cover plate parallel piece 110, a first pole connecting piece 120, and a second pole connecting piece 130. A first end of the first pole connecting piece 120 is bent at the first end of the cover plate parallel piece 110. The first pole connecting piece 120 and the cover plate parallel piece 110 are parallel and have a height difference. A first end of the second pole connecting piece 130 is bent at a side edge of the cover plate parallel piece 110. The second pole connecting piece 130 and the first pole connecting piece 120 are parallel and coplanar. The second pole connecting piece 130 and the first pole connecting piece 120 are both protruding from the same side of the cover plate parallel piece 110. The second pole connecting piece 130 is located between the two ends of the cover plate parallel piece 110. An angle may exist between any two of the cover plate parallel piece 110, the first pole connecting piece 120, and the second pole connecting piece 130.

[0057] like Figure 3 As shown, in this embodiment, the series-parallel claw 100 is used to connect the cylindrical battery pack 200, which includes four first cylindrical batteries 210. The line connecting the centers of any three adjacent first cylindrical batteries 210 forms an equilateral triangle. The two ends of the cover parallel plate 110 are respectively used to connect to the cover plates 211 of two of the first cylindrical batteries 210, and the first pole connecting plate 120 and the second pole connecting plate 130 are respectively used to connect to the poles 212 of the other two first cylindrical batteries 210, so that the four first cylindrical batteries 210 are connected.

[0058] It should be noted that any three first cylindrical batteries 210 forming an equilateral triangle must be arranged adjacent to each other. For example, any three adjacent first cylindrical batteries 210 forming an equilateral triangle are first cylindrical battery A, first cylindrical battery B, and first cylindrical battery D, and any three adjacent first cylindrical batteries 210 forming an equilateral triangle are first cylindrical battery A, first cylindrical battery C, and first cylindrical battery D.

[0059] The above-mentioned series-parallel claw 100 is used to connect a cylindrical battery pack 200. The cylindrical battery pack 200 includes four first cylindrical batteries 210. The line connecting the centers of any three adjacent first cylindrical batteries 210 forms an equilateral triangle, so that the gap between any two adjacent first cylindrical batteries 210 is the same, so that the gap between any two adjacent first cylindrical batteries 210 can be kept small, thereby improving the space utilization of the cylindrical battery pack 200 and thereby improving the structural compactness of the cylindrical battery pack 200. Since there is an angle between any two of the cover plate parallel piece 110, the first pole connecting piece 120 and the second pole connecting piece 130, the two ends of the cover plate parallel piece 110 can be respectively connected to the cover plates 211 of two of the first cylindrical batteries 210, and the first pole connecting piece 120 and the second pole connecting piece 130 can be respectively connected to the poles 212 of the other two first cylindrical batteries 210. That is, while maintaining a high structural compactness of the cylindrical battery pack 200, the series-parallel claws 100 can connect the four first cylindrical batteries 210 of the cylindrical battery pack 200, thereby improving the structural compactness of the cylindrical battery pack 200; and because the series-parallel battery module 10 includes the cylindrical battery pack 200, the series-parallel battery module 10 is connected using the series-parallel claws 100 to improve the structural compactness, making the series-parallel battery module 10 have a high structural compactness.

[0060] like Figure 3 As shown, in one embodiment, the cover plate parallel piece 110 is provided with a clearance notch 111. The clearance notch 111 is used to avoid the corresponding pole bracket 213 of the first cylindrical battery 210, thereby preventing interference between the cover plate parallel piece 110 and the corresponding pole bracket 213 of the first cylindrical battery 210. In this embodiment, the pole bracket 213 is a plastic bracket.

[0061] like Figure 3 As shown, in one embodiment, the avoidance notch 111 is arc-shaped, so that the avoidance notch 111 is adapted to the corresponding pole bracket 213, so that the cover plate parallel piece 110 can be arranged along the extension direction of the cover plate 211 of the corresponding first cylindrical battery 210, so that the connection area between the cover plate parallel piece 110 and the cover plate 211 of the corresponding first cylindrical battery 210 is larger, thereby improving the current flow capacity of the cover plate parallel piece 110.

[0062] like Figure 3 As shown, in one embodiment, the second end of the first pole connecting piece 120 is circular, so that the first pole connecting piece 120 is compatible with the corresponding pole 212 .

[0063] like Figure 3 As shown, in one embodiment, the second end of the second pole connecting piece 130 is rounded, so that the first pole connecting piece 120 is compatible with the corresponding pole 212 .

[0064] like Figure 3 As shown, in one embodiment, the cover plate paralleling piece 110 is welded to the cover plates 211 of two of the first cylindrical batteries 210, and the first and second electrode connecting pieces 120, 130 are welded to the electrodes 212 of the other two first cylindrical batteries 210. In this embodiment, the series-parallel connection claws 100 are connected to the four first cylindrical batteries 210 by welding, which improves the installation efficiency and stability of the series-parallel connection claws 100.

[0065] like Figure 3 As shown, in one embodiment, the angle between the first pole connecting piece 120 and the second pole connecting piece 130 is an acute angle, and the angle between the second pole connecting piece 130 and the cover parallel piece 110 is an acute angle, so that the cover parallel piece 110, the first pole connecting piece 120 and the second pole connecting piece 130 can be welded to the compact cylindrical battery pack 200, and the electrical connection of the four first cylindrical batteries 210 is realized.

[0066] like Figure 2b As shown, in one embodiment, the series-parallel claw 100 further includes a pre-fixing piece 140, which is fixedly connected to the cover plate parallel piece 110 and protrudes from the cover plate parallel piece 110. The pre-fixing piece 140 is provided with a positioning hole 141. In this embodiment, before welding the series-parallel claw 100, the series-parallel claw 100 is first aligned using the positioning hole 141 so that the cover plate parallel piece 110, the first pole connecting piece 120, and the second pole connecting piece 130 are in the corresponding welding position. Finally, welding is performed, thereby improving welding accuracy.

[0067] like Figure 2b As shown, in one embodiment, the series-parallel claw 100 is a stamping structure, which improves the manufacturing efficiency and strength of the series-parallel claw 100.

[0068] As shown in Figure 4 and Figure 5As shown, the present application also provides a series-parallel battery module 10, including the above-mentioned series-parallel claws 100, wherein the plurality of series-parallel claws 100 are spaced apart along the second direction and arranged at the same angle, with the direction indicated by arrow B being the second direction. The series-parallel battery module 10 also includes two first battery groups 300 spaced apart along the first direction, with the direction indicated by arrow A being the first direction. Each first battery group 300 includes a plurality of first cylindrical batteries 210 spaced apart along the second direction. The plurality of first cylindrical batteries 210 of the two first battery groups 300 are arranged in a one-to-one correspondence. Each first cylindrical battery 210 of each first battery group 300 and the corresponding first cylindrical battery 210 together form a battery arrangement group 400, so that the two first battery groups 300 together form a plurality of side-by-side battery arrangement groups 400. Two adjacent battery groups 400 together form a cylindrical battery group 200, so that multiple battery groups 400 together form multiple cylindrical battery groups 200. For example, the first cylindrical battery A, the first cylindrical battery B, the first cylindrical battery C, and the first cylindrical battery D together form a cylindrical battery group 200, the first cylindrical battery C, the first cylindrical battery D, the first cylindrical battery E, and the first cylindrical battery F together form a cylindrical battery group 200, the first cylindrical battery E, the first cylindrical battery F, the first cylindrical battery G, and the first cylindrical battery H together form a cylindrical battery group 200, and so on for the remaining cylindrical battery groups 200.

[0069] like Figure 4b and Figure 3 As shown, multiple cylindrical battery packs 200 are further arranged in a one-to-one correspondence with multiple series-parallel claws 100. The two ends of the cover parallel piece 110 of each series-parallel claw 100 are respectively connected to the cover plates 211 of two first cylindrical batteries 210 of the corresponding cylindrical battery pack 200. The first pole connecting piece 120 and the corresponding second pole connecting piece 130 of each series-parallel claw 100 are respectively connected to the poles 212 of the other two first cylindrical batteries 210 of the corresponding cylindrical battery pack 200, so that the multiple first cylindrical batteries 210 are connected in series and parallel. In this embodiment, the angle between the first direction and the second direction is an obtuse angle, that is, the angle between the first direction and the second direction is greater than 90 degrees.

[0070] In the above-mentioned series-parallel battery module 10, each cylindrical battery pack 200 is correspondingly provided with a series-parallel claw 100, that is, a plurality of series-parallel claws 100 are provided in a one-to-one correspondence with a plurality of cylindrical battery packs 200, and each cylindrical battery pack 200 includes four first cylindrical batteries 210, and the line connecting the centers of any three adjacent first cylindrical batteries 210 forms an equilateral triangle, so that the gap between any two adjacent first cylindrical batteries 210 is the same, so that the gap between any two adjacent first cylindrical batteries 210 can be kept small, thereby improving the series-parallel battery module 10. The space utilization of the battery module 10 is improved, thereby improving the structural compactness of the series-parallel battery module 10. Since the two ends of the cover parallel piece 110 of each series-parallel claw 100 are respectively connected to the cover plates 211 of the two first cylindrical batteries 210 of the corresponding cylindrical battery pack 200, and the first pole connecting piece 120 and the corresponding second pole connecting piece 130 of each series-parallel claw 100 are respectively connected to the poles 212 of the other two first cylindrical batteries 210 of the corresponding cylindrical battery pack 200, multiple first cylindrical batteries 210 are connected in series and parallel. In other words, while maintaining a high structural compactness of the series-parallel battery module 10, multiple series-parallel claws 100 can connect multiple first cylindrical batteries 210 in series and parallel, thereby improving the structural compactness of the series-parallel battery module 10.

[0071] like Figure 4b and Figure 5 As shown, in one embodiment, a plurality of side-by-side battery arrangement groups 400 include an edge battery group, and the poles of the two first cylindrical batteries 210 of the edge battery group are not connected together. The series-parallel battery module 10 further includes a second parallel claw 500, the two ends of which are respectively connected to the poles 212 of the two first cylindrical batteries 210 of the edge battery group. In this embodiment, before the second parallel claw 500 is installed, the two first cylindrical batteries 210 of the edge battery group are not connected in parallel, specifically, the poles of the two first cylindrical batteries 210 of the edge battery group are not connected together. Because the two ends of the second parallel claw 500 are respectively connected to the poles 212 of the two first cylindrical batteries 210 of the edge battery group, the two first cylindrical batteries 210 of the edge battery group are connected in parallel.

[0072] like Figure 4b As shown, the second parallel claw 500 further includes a connecting portion 510 and two welding portions 520. The two welding portions 520 are fixedly connected to the ends of the connecting portion 510 and protrude from one side of the connecting portion 510. The two welding portions 520 are respectively welded to the corresponding poles 212 of the two first cylindrical batteries 210. Furthermore, the second parallel claw 500 is a stamped structure.

[0073] Figure 6 and Figure 7As shown, in another embodiment, the number of battery arrangement groups 400 is at least three, and the number of battery arrangement groups 400 is an odd number. The series-parallel battery module 10 also includes a plurality of second battery groups 600, a plurality of terminal parallel claws 700, and a plurality of series-parallel plates 800. The plurality of second battery groups 600 are spaced apart along the second direction, and each second battery group 600 includes two second cylindrical batteries 610 spaced apart along the second direction. The direction indicated by arrow A is the first direction, and the direction indicated by arrow B is the second direction. The angle between the first direction and the second direction is an obtuse angle.

[0074] like Figure 7 As shown, further, the two first battery groups 300 are a side row battery group and a middle row battery group, and the middle row battery group is located between the side row battery group and the second battery group 600. Figure 6b As shown, further, an alignment notch 101 is formed between the cover parallel piece 110 of each series-parallel claw 100 and the corresponding second pole connecting piece 120, and the alignment notches 101 of the multiple series-parallel claws 100 are respectively arranged opposite to the multiple second cylindrical batteries 610, and the line connecting the center of each second cylindrical battery 610 and the center of its two adjacent first cylindrical batteries 210 forms an equilateral triangle, so as to improve the structural compactness of the series-parallel battery module 10.

[0075] It should be noted that if Figure 7 As shown, each second cylindrical battery 610 and its two adjacent first cylindrical batteries 210 forming an equilateral triangle must be arranged adjacent to each other. For example, the line connecting the center of the second cylindrical battery I, the center of the first cylindrical battery B, and the center of the first cylindrical battery D forms an equilateral triangle, and the line connecting the center of the second cylindrical battery J, the center of the first cylindrical battery D, and the center of the first cylindrical battery F forms an equilateral triangle.

[0076] like Figure 6b As shown, further, multiple pole parallel claws 700 are arranged in a one-to-one correspondence with multiple second battery packs 600, and the two ends of each pole parallel claw 700 are respectively connected to the poles of the two second cylindrical batteries 610 of the corresponding second battery pack 600, and multiple series-parallel pieces 800 are arranged in a one-to-one correspondence with the multiple second battery packs 600, and each series-parallel piece 800 is respectively connected to the cover plate of the two second cylindrical batteries 610 of the corresponding second battery pack 600, so that the two second cylindrical batteries 610 of each second battery pack 600 are connected in parallel. Among them, a string of parallel plates 800 adjacent to the second parallel claw 500 is a first string-parallel plate 800a, a first end of the first string-parallel plate 800a is connected to the second parallel claw 500, and the remaining string-parallel plates 800 are second string-parallel plates 800b, and the first end of each second string-parallel plate 800b is connected to the adjacent pole parallel claw 700, so that the multiple second battery groups 600 and the multiple battery arrangement groups 400 are connected in series in sequence, while increasing the capacity of the series-parallel battery module 10.

[0077] like Figure 6b As shown, in one embodiment, the terminal parallel claw 700 includes a connecting body 710 and two terminal connectors 720. The two terminal connectors 720 are fixedly connected to the ends of the connecting body 710 and welded to the corresponding terminals of the two second cylindrical batteries 610. Furthermore, the terminal parallel claw 700 also includes a positioning piece 730, which is fixedly connected to the connecting body 710 and protrudes from the connecting body 710. The positioning piece 730 is provided with an alignment hole. Furthermore, the terminal parallel claw 700 is a stamped structure.

[0078] like Figure 6b and Figure 7 As shown, in one embodiment, the battery arrangement group 400 away from the second parallel claw 500 is a positioning battery group 400a. The two first cylindrical batteries 210 in the positioning battery group 400a are both positioning batteries 210a. The series-parallel battery module 10 also includes a third battery group 900a and an electrical connection claw 900b. The third battery group 900a is located on the side of the positioning battery group 400a away from the second parallel claw 500. The third battery group 900a includes two third cylindrical batteries 910 spaced apart along a first direction, the first direction being the direction indicated by arrow A. The line connecting the center of the positioning battery 210a adjacent to the second cylindrical battery 610 and the centers of the two third cylindrical batteries 910 forms an equilateral triangle. The electrical connection claw 900b is respectively connected to the cover plates of the two positioning batteries 210a. The electrical connection claw 900b is also respectively connected to the terminals of the two third cylindrical batteries 910.

[0079] like Figure 6b As shown, further, the electrical connection claws 900b are respectively connected to the cover plates of the two positioning batteries 210a, so that the two positioning batteries 210a are connected in parallel, and the electrical connection claws 900b are also respectively connected to the poles of the two third cylindrical batteries 910, so that each third cylindrical battery 910 is connected in series with the positioning battery group 400a. In this way, multiple first cylindrical batteries 210, multiple second cylindrical batteries 610 and multiple third cylindrical batteries 910 are connected in series and parallel, thereby improving the capacity of the series-parallel battery module 10.

[0080] like Figure 6b As shown, in this embodiment, since the center of the positioning battery 210a adjacent to the second cylindrical battery 610 and the line connecting the centers of the two third cylindrical batteries 910 form an equilateral triangle, the gap between any two adjacent cylindrical batteries is the same, so that the gap between any two adjacent cylindrical batteries can be kept small, thereby improving the space utilization of the series-parallel battery module 10, making the structure of the series-parallel battery module 10 compact and high, and also making the series-parallel battery module 10 a symmetrical structure.

[0081] like Figure 8 and Figure 9 As shown, in one embodiment, the electrical connection claw 900b includes a cover contact piece 920, a first pole contact piece 930, and a second pole contact piece 940. The ends of the cover contact piece 920 are respectively connected to the two covers of the positioning battery 210a. The first end of the first pole contact piece 930 is bent to form the first end of the cover contact piece 920. The first pole contact piece 930 is parallel to the cover contact piece 920 and has a height difference. The first end of the second pole contact piece 940 is bent at the side of the cover contact piece 920. The second pole contact piece 940 is parallel to the first pole contact piece 930 and is on the same plane. The second pole contact piece 940 and the first pole contact piece 930 are both protruding on the same side of the cover contact piece 920. The second pole contact piece 940 is located between the two ends of the cover contact piece 920. There is an angle between any two of the cover contact piece 920, the first pole contact piece 930 and the second pole contact piece 940. The first pole contact piece 930 and the second pole contact piece 940 are respectively connected to the poles of the two third cylindrical batteries 910.

[0082] like Figure 8 and Figure 9 As shown, in this embodiment, since there is an angle between any two of the cover contact piece 920, the first pole contact piece 930 and the second pole contact piece 940, the two ends of the cover contact piece 920 can be respectively connected to the cover plates of the two positioning batteries 210a, and the first pole contact piece 930 and the second pole contact piece 940 can be respectively connected to the poles of the two third cylindrical batteries 910, thereby improving the structural compactness of the series-parallel battery module 10.

[0083] In one embodiment, the series-parallel battery module 10 further includes an insulating colloid that coats and connects to the surface of each first cylindrical battery 210 to prevent short circuits between adjacent cylindrical batteries due to contact. In this embodiment, the insulating colloid layer is filled into the housing of the series-parallel battery module 10, such that the insulating colloid coats and connects to the surface of each cylindrical battery.

[0084] like Figure 7 As shown, in one embodiment, the space between two adjacent first cylindrical batteries 210 accommodates part of another first cylindrical battery 210, so that each first cylindrical battery is located between its two adjacent first cylindrical batteries, and part of each first cylindrical battery is accommodated between its two adjacent first cylindrical batteries, making the structure of the series-parallel battery module 10 more compact.

[0085] In one embodiment, the gap between two adjacent cylindrical batteries is 0.3 mm to 1 mm. Furthermore, the gap between two adjacent cylindrical batteries is 0.5 mm. It can be understood that since the gap between two adjacent cylindrical batteries is small, the outer contours of the two adjacent cylindrical batteries appear to be in contact from the figure.

[0086] It should be emphasized that the above-mentioned cylindrical battery includes at least one of a first cylindrical battery, a second cylindrical battery and a third cylindrical battery.

[0087] like Figure 4a and Figure 6a In one embodiment, the series-parallel battery module 10 further includes a first bracket 900c and a second bracket 900d. The first bracket 900c and the second bracket 900d are arranged relative to each other and spaced apart. The first bracket 900c is provided with a plurality of first fixing grooves, and the second bracket is provided with a plurality of second fixing grooves. One end of the plurality of cylindrical batteries having poles is correspondingly accommodated in the plurality of first fixing grooves, and the other ends of the plurality of cylindrical batteries are correspondingly accommodated in the plurality of second fixing grooves, so that each cylindrical battery is fixed to the first bracket 900c and the second bracket 900d, and the first bracket 900c and the second bracket 900d jointly restrict the arrangement structure of the cylindrical batteries.

[0088] like Figure 4a and Figure 6a Furthermore, the first bracket 900c further defines a plurality of first avoidance holes 901, which are in one-to-one correspondence with the plurality of first fixing slots. Furthermore, the second bracket 900d further defines a plurality of second avoidance holes, which are in one-to-one correspondence with the plurality of second fixing slots.

[0089] It should be emphasized that the above-mentioned cylindrical battery includes at least one of a first cylindrical battery, a second cylindrical battery and a third cylindrical battery.

[0090] The present application also provides a glue injection method for performing glue injection operations on the series-parallel battery module described in any of the above embodiments.

[0091] like Figure 4a and Figure 6a Furthermore, the glue injection operation is performed through the multiple first avoidance holes 901, so that the glue flows through the multiple first avoidance holes 901 to the gap between any two adjacent cylindrical batteries, avoiding the problem of short circuit caused by contact between the two adjacent cylindrical batteries.

[0092] Furthermore, the glue injection method includes: placing the glue injection nozzle against the first bracket; and injecting the glue into the gap between any two adjacent cylindrical batteries through the glue injection nozzle.

[0093] It needs to be emphasized again that the above-mentioned cylindrical battery includes at least one of a first cylindrical battery, a second cylindrical battery and a third cylindrical battery.

[0094] In one embodiment, the thickness of each serial-parallel claw is 0.1 mm to 0.3 mm. Further, the thickness of each serial-parallel claw is 0.2 mm, so that the serial-parallel claw can be stamped and formed, while reducing the springback of the material and ensuring the accuracy of the serial-parallel claw.

[0095] It can be understood that when the first cylindrical battery is larger, such as a 21700 battery or a 26650 battery, the first pole connecting piece and the second pole connecting piece are both longer. Since the thickness of the series-parallel claws is relatively thin, the first pole connecting piece and the second pole connecting piece are both easier to deform, making it easier for the first pole connecting piece and the second pole connecting piece to contact the cover plate of the corresponding first cylindrical battery, resulting in a higher risk of short circuit of the first cylindrical battery.

[0096] In traditional technology, in order to avoid the problem of short circuit caused by deformation of the connecting piece, cotton sheets are pasted on the parts of the connecting piece where there is a risk of short circuit. However, the arrangement of the cylindrical batteries in the series-parallel battery module of the present application is relatively compact, resulting in a smaller gap between the cylindrical batteries. When injecting glue, the colloid flows slowly. If the cotton sheet is set to the part where the series-parallel claw has a risk of short circuit, the cotton sheet will hinder the flow of the colloid, resulting in worse castability of the colloid, making it more difficult for the colloid to fill the gap in the series-parallel battery module. Therefore, it is necessary to increase the pressure of the glue injection, but this will cause the cylindrical battery to be subjected to greater pressure, resulting in the risk of deformation of the cylindrical battery, thereby affecting the electrical performance of the series-parallel battery module. In addition, the cotton sheet will also have the problem of heat accumulation, resulting in poor heat dissipation performance of the series-parallel battery module, thereby reducing the electrical performance of the series-parallel battery module. Therefore, the cotton sheet cannot be applied to the series-parallel claw of the present application.

[0097] In order to avoid the short circuit problem caused by the first pole connecting piece 120 and the second pole connecting piece 130, as shown in FIG. Figure 10As shown, in another embodiment, the first pole connecting piece 120 of each series-parallel claw 100 is stamped with a plurality of spaced first reinforcing ribs 121. Each first reinforcing rib 121 protrudes from a side of the corresponding first pole connecting piece 120 adjacent to the corresponding first cylindrical battery 210. A gap exists between each first reinforcing rib 121 and the cover plate 211 of the corresponding first cylindrical battery 210. The extension direction of each first reinforcing rib 121 is parallel to the extension direction of the corresponding first pole connecting piece 120. This ensures that the strength of the first pole connecting piece 120 of each series-parallel claw 100 is high, preventing the first pole connecting piece 120 of each series-parallel claw 100 from deforming and contacting the cover plate 211, thereby preventing the first pole connecting piece 120 from causing a short circuit. Furthermore, because the first pole connecting piece 120 of each series-parallel claw 100 is stamped with a plurality of spaced first reinforcing ribs 121, the surface area of ​​the first pole connecting piece 120 of each series-parallel claw 100 is increased, improving the heat dissipation of each series-parallel claw 100 and, in turn, the performance of the first cylindrical battery 210. Furthermore, each first reinforcing rib 121 protrudes from the side of the corresponding first pole connecting piece 120 adjacent to the corresponding first cylindrical battery 210, allowing each first reinforcing rib 121 to be positioned between the corresponding first pole connecting piece 120 and the corresponding cover plate parallel piece 110. This prevents the first reinforcing rib 121 from increasing the volume of the series-parallel battery module 10, thereby improving the compactness of the structure.

[0098] like Figure 10 As shown, further, the second pole connecting piece 130 of each series-parallel claw 100 is stamped with a plurality of spaced second reinforcing ribs 131. Each second reinforcing rib 131 protrudes from a side of the corresponding second pole connecting piece 130 adjacent to the corresponding first cylindrical battery 210. A gap exists between each second reinforcing rib 131 and the cover plate 211 of the corresponding first cylindrical battery 210. The extension direction of each second reinforcing rib 131 is parallel to the extension direction of the corresponding second pole connecting piece 130. This makes the second pole connecting piece 130 of each series-parallel claw 100 stronger, avoids deformation of the second pole connecting piece 130 of each series-parallel claw 100 and contact with the cover plate 211, and thus avoids the problem of the second pole connecting piece 130 causing a short circuit. Furthermore, because the second terminal connecting piece 130 of each series-parallel claw 100 is stamped with multiple spaced second reinforcing ribs 131, the surface area of ​​the second terminal connecting piece 130 of each series-parallel claw 100 is increased, improving the heat dissipation of each series-parallel claw 100 and, in turn, the performance of the first cylindrical battery 210. Furthermore, each second reinforcing rib 131 protrudes from the side of the corresponding second terminal connecting piece 130 adjacent to the corresponding first cylindrical battery 210, allowing each second reinforcing rib 131 to be positioned between the corresponding second terminal connecting piece 130 and the corresponding cover plate parallel piece 110. This prevents the first reinforcing rib 121 from increasing the volume of the series-parallel battery module 10, thereby improving the compactness of the structure.

[0099] Compared with the prior art, the present invention has at least the following advantages:

[0100] In the above-mentioned series-parallel battery module 10, each cylindrical battery pack 200 is correspondingly provided with a series-parallel claw 100, that is, a plurality of series-parallel claws 100 are provided in a one-to-one correspondence with a plurality of cylindrical battery packs 200, and each cylindrical battery pack 200 includes four first cylindrical batteries 210, and the line connecting the centers of any three adjacent first cylindrical batteries 210 forms an equilateral triangle, so that the gap between any two adjacent first cylindrical batteries 210 is the same, so that the gap between any two adjacent first cylindrical batteries 210 can be kept small, thereby improving the series-parallel battery module 10. The space utilization of the battery module 10 is improved, thereby improving the structural compactness of the series-parallel battery module 10. Since the two ends of the cover parallel piece 110 of each series-parallel claw 100 are respectively connected to the cover plates 211 of the two first cylindrical batteries 210 of the corresponding cylindrical battery pack 200, and the first pole connecting piece 120 and the corresponding second pole connecting piece 130 of each series-parallel claw 100 are respectively connected to the poles 212 of the other two first cylindrical batteries 210 of the corresponding cylindrical battery pack 200, multiple first cylindrical batteries 210 are connected in series and parallel. In other words, while maintaining a high structural compactness of the series-parallel battery module 10, multiple series-parallel claws 100 can connect multiple first cylindrical batteries 210 in series and parallel, thereby improving the structural compactness of the series-parallel battery module 10.

[0101] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A series-parallel battery module, characterized in that: The serial-parallel claw comprises: Cover plate parallel piece; a first pole connecting piece, wherein a first end of the first pole connecting piece is bent and formed at a first end of the cover plate parallel piece, the first pole connecting piece is parallel to the cover plate parallel piece and has a height difference therebetween; and A second pole connecting piece, wherein the first end of the second pole connecting piece is bent at a side of the cover plate parallel piece, the second pole connecting piece is parallel to the first pole connecting piece and is on the same plane, the second pole connecting piece and the first pole connecting piece are both protrudingly provided on the same side of the cover plate parallel piece, the second pole connecting piece is located between the two ends of the cover plate parallel piece, and an angle exists between any two of the cover plate parallel piece, the first pole connecting piece, and the second pole connecting piece; The series-parallel battery module further includes two first battery groups spaced apart along a first direction, each first battery group includes a plurality of first cylindrical batteries spaced apart along a second direction, the plurality of first cylindrical batteries of the two first battery groups are arranged in one-to-one correspondence, each first cylindrical battery of each first battery group and the corresponding first cylindrical battery together form a battery arrangement group, so that the two first battery groups together form a plurality of side-by-side battery arrangement groups, two adjacent battery arrangement groups together form a cylindrical battery group, so that the plurality of battery arrangement groups together form a plurality of cylindrical battery groups, and the line connecting the centers of any three adjacent first cylindrical batteries forms an equilateral triangle; There are multiple series-parallel claws, and the multiple series-parallel claws are spaced apart along the second direction and arranged at the same angle. The multiple cylindrical battery packs are arranged in a one-to-one correspondence with the multiple series-parallel claws. The two ends of the cover plate parallel piece of each series-parallel claw are respectively connected to the cover plates of the two first cylindrical batteries of the corresponding cylindrical battery pack, and the first pole connecting piece and the corresponding second pole connecting piece of each series-parallel claw are respectively connected to the poles of the other two first cylindrical batteries of the corresponding cylindrical battery pack; The cover plate parallel piece of each of the series-parallel claws is provided with a avoidance notch, and the avoidance notch of the cover plate parallel piece of each of the series-parallel claws is used to avoid the corresponding pole support of the first cylindrical battery; There is an edge battery group among the multiple parallel battery arrangement groups, and the series-parallel battery module further includes a second parallel claw, and the two ends of the second parallel claw are respectively connected to the poles of the two first cylindrical batteries in the edge battery group.

2. The series-parallel battery module according to claim 1, characterized in that: The avoidance notches of the cover plate parallel pieces of each of the series-parallel claws are in an arc shape.

3. The series-parallel battery module according to claim 1, characterized in that: The second end of the first pole connecting piece of each series-parallel claw is circular; and / or, The second end of the second pole connecting piece of each of the series-parallel claws is circular.

4. The series-parallel battery module according to claim 1, characterized in that: The number of the battery arrangement groups is at least three, and the number of the battery arrangement groups is an odd number; the series-parallel battery module further includes: a plurality of second battery groups spaced apart along the second direction, each second battery group comprising two second cylindrical batteries spaced apart along the second direction; the two first battery groups being a side battery group and a middle battery group, the middle battery group being located between the side battery group and the second battery group; an alignment notch being formed between the cover parallel piece of each series-parallel claw and the corresponding second pole connecting piece; the alignment notches of the plurality of series-parallel claws being respectively arranged opposite to the plurality of second cylindrical batteries; the center of each second cylindrical battery and a line connecting the centers of its two adjacent first cylindrical batteries forming an equilateral triangle; a plurality of pole parallel claws, provided in one-to-one correspondence with the plurality of second battery packs, wherein both ends of each pole parallel claw are respectively connected to the poles of the two second cylindrical batteries of the corresponding second battery pack; and A plurality of series-parallel plates are arranged in a one-to-one correspondence with the plurality of second battery groups, and each of the series-parallel plates is respectively connected to the cover plates of the two second cylindrical batteries of the corresponding second battery group, so that the two second cylindrical batteries of each second battery group are connected in parallel; wherein, the series-parallel plate adjacent to the second parallel claw is a first series-parallel plate, and the first end of the first series-parallel plate is connected to the second parallel claw, and the remaining series-parallel plates are second series-parallel plates, and the first end of each second series-parallel plate is connected to the adjacent pole parallel claw, so that the plurality of second battery groups and the plurality of battery arrangement groups are connected in series in sequence.

5. The series-parallel battery module according to claim 4, characterized in that: The battery arrangement group away from the second parallel claw is a positioning battery group, and the two first cylindrical batteries of the positioning battery group are both positioning batteries. The series-parallel battery module also includes: a third battery pack located on a side of the positioning battery pack away from the second parallel claw, the third battery pack comprising two third cylindrical batteries spaced apart along the first direction, wherein a line connecting the center of the positioning battery adjacent to the second cylindrical battery and the centers of the two third cylindrical batteries forms an equilateral triangle; and The electrical connection claws are respectively connected to the cover plates of the two positioning batteries, and the electrical connection claws are also respectively connected to the poles of the two third cylindrical batteries.

6. The series-parallel battery module according to claim 5, characterized in that: The electrical connection claw comprises: A cover plate contact piece, the two ends of which are respectively connected to the two cover plates of the positioning battery; a first pole contact piece, wherein a first end of the first pole contact piece is bent and formed at a first end of the cover contact piece, and the first pole contact piece is parallel to the cover contact piece and has a height difference; and A second pole contact piece, wherein the first end of the second pole contact piece is bent at the side of the cover contact piece, the second pole contact piece is parallel to the first pole contact piece and is on the same plane, the second pole contact piece and the first pole contact piece are both protruding on the same side of the cover contact piece, the second pole contact piece is located between the two ends of the cover contact piece, and there is an angle between any two of the cover contact piece, the first pole contact piece and the second pole contact piece, and the first pole contact piece and the second pole contact piece are respectively connected to the poles of the two third cylindrical batteries.

7. The series-parallel battery module according to any one of claims 1 to 6, characterized in that: The series-parallel battery module further includes an insulating colloid, which is coated and connected to the surface of each of the first cylindrical batteries; and / or, The gap between adjacent first cylindrical batteries is 0.3 mm to 1 mm.

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