Battery

Abstract

The invention relates to the technical field of batteries, and discloses a battery which comprises a first connecting piece for connecting two adjacent battery cell modules, the first connecting piece comprises a first connecting part, a second connecting part and a buffer connecting part; the two opposite ends of the buffer connecting part are connected with the first connecting part and the second connecting part respectively, a bent structure is formed at the connecting position of the buffer connecting part and the first connecting part, and a bent structure is formed at the connecting position of the buffer connecting part and the second connecting part. The battery provided by the invention can effectively prevent the battery cell module from being pushed away from the original position by expansion force, so that the safety of the battery is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and in particular to a battery. Background Art

[0002] In the new energy industry, batteries are one of the most core components. The battery pack mainly includes the following modules: battery cell module, thermal management module, acquisition module, battery box module, electrical module, etc. There are generally at least two battery cell modules, and two batteries are usually directly connected by a connector. The connector is generally a straight strip structure, and the opposite ends of the connector are connected to a battery cell module respectively.

[0003] Existing batteries have the following technical defects: the connector is a straight strip structure, which results in the connector being difficult to bend and deform when the battery cell of the battery module expands, which may cause one of the battery modules to be pushed out of position by the expansion force of the battery cell, causing the battery to deform and even pose a safety hazard.

[0004] In view of this, it is necessary to design a battery that can effectively prevent the battery cell module from being pushed out of position by the expansion force, thereby improving the safety of the battery. Summary of the invention

[0005] The object of the present invention is to provide a battery that can effectively prevent a battery cell module from being pushed out of position by an expansion force, thereby improving the safety of the battery.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] A battery, comprising a first connector for connecting two adjacent battery cell modules;

[0008] The first connecting member includes a first connecting part, a second connecting part and a buffer connecting part; the opposite ends of the buffer connecting part are respectively connected to the first connecting part and the second connecting part, and the connection between the buffer connecting part and the first connecting part forms a bending structure, and the connection between the buffer connecting part and the second connecting part forms a bending structure.

[0009] Optionally, the battery further comprises a second connecting member;

[0010] The second connecting member is provided with four mounting connection holes arranged in a circular array around the center point of the second connecting member, and each mounting connection hole is used to connect an independent battery cell module; a raised reinforcement portion is formed between two adjacent mounting connection holes, and all the reinforcement portions are connected to each other at one end close to the center point.

[0011] Optionally, both the buffer connection portion and the second connection member are provided with a penetrating cable tie mounting hole.

[0012] Optionally, the battery cell module includes an end plate, and the end plate is provided with a first fastening hole for connecting the first connecting member and a second fastening hole for connecting the second connecting member;

[0013] The end plates are disposed at opposite ends of the battery core module.

[0014] Optionally, the battery further includes four battery cell modules, the second connecting member is arranged in the middle of the four battery cell modules, and the first connecting member is arranged around the second connecting member.

[0015] Optionally, the battery cell module further includes a strapping tape and a plurality of battery cells arranged in an array;

[0016] The binding belt binds the battery core and the end plate so that the end plate and the battery core are relatively fixed.

[0017] Optionally, the buffer connection portion is curved in an arc shape.

[0018] Optionally, the battery comprises an even number of pairs of the battery cell modules; the battery cell module comprises a plurality of battery cell columns, each battery cell column comprises an odd number of battery cells; the battery cells in the same battery cell module are connected in series in a serpentine manner, and two adjacent battery cell modules are connected in series via a connecting copper busbar;

[0019] In the same battery cell module, the connecting copper bar of the incoming line and the connecting copper bar of the outgoing line are respectively connected to two diagonal battery cells; wherein, one connecting copper bar is the total positive output pole of the battery, and the other connecting copper bar is the total negative output pole of the battery, and the total positive output pole and the total negative output pole are arranged side by side with an interval.

[0020] Optionally, the connecting copper busbar includes a first conductive connecting portion, a second conductive connecting portion and an intermediate buffer portion, a connection between the intermediate buffer portion and the first conductive connecting portion forms a bending structure, and a connection between the intermediate buffer portion and the second conductive connecting portion forms a bending structure.

[0021] Optionally, two battery cells connected in series are connected in series by using a series row; the series row is provided with an arc-shaped buffer portion, and two ends of the series row are respectively connected to two adjacent battery cells.

[0022] An electrical device comprises a battery as described in any one of the above items.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] In this embodiment, two adjacent battery cell modules are connected by a first connecting member. When the battery cells in the battery cell module expand, the expansion force will mainly act on the buffer connection part, and the expansion force forces the bending angle of the buffer connection part to further increase. That is, the setting of the bending structure makes the first connecting member easier to bend and deform, thereby reducing the possibility of the battery cell module being pushed away from its original position by the expansion force, and further improving the safety of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0026] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantive technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0027] Figure 1 A schematic diagram of the assembly structure of a battery provided in an embodiment of the present invention;

[0028] Figure 2 A schematic diagram of the connection structure of four battery modules provided in an embodiment of the present invention;

[0029] Figure 3 for Figure 2 A magnified schematic diagram of position A in the middle;

[0030] Figure 4 A schematic top view of four battery modules in an assembled state provided in an embodiment of the present invention;

[0031] Figure 5 for Figure 4 A schematic diagram of the middle structure from the side;

[0032] Figure 6 A schematic diagram of the connection structure of four battery modules provided by an embodiment of the present invention when the battery cells are hidden;

[0033] Figure 7 for Figure 6 A magnified schematic diagram of position B in the middle;

[0034] Figure 8 for Figure 6 A magnified schematic diagram of the middle C position;

[0035] Fig. 9 for Figure 6 A magnified schematic diagram of the D position in the middle;

[0036] Fig.10 for Figure 6 A top view of the structure in FIG.

[0037] Fig.11 A schematic diagram of the three-dimensional structure of a first connecting member provided in an embodiment of the present invention;

[0038] Fig.12 A schematic diagram of the three-dimensional structure of a second connecting member provided in an embodiment of the present invention;

[0039] Fig.13 A schematic diagram of a three-dimensional structure of a series arrangement provided by an embodiment of the present invention;

[0040] Fig.14 A schematic diagram of another three-dimensional structure of a series connection provided by an embodiment of the present invention;

[0041] Fig.15 A schematic diagram of the three-dimensional structure of the connecting copper bus provided in an embodiment of the present invention.

[0042] Illustrations: 100, battery cell module; 101, battery cell; 102, strapping tape; 11, first connector; 111, first connecting portion; 112, second connecting portion; 113, buffer connecting portion; 114, strap mounting hole; 12, second connector; 121, mounting connection hole; 122, reinforcement portion; 21, end plate; 211, first fastening hole; 212, second fastening hole; 31, series row; 311, first series connection portion; 312, second series connection portion; 313, arc-shaped buffer portion; 4, connecting copper busbar; 41, first conductive connecting portion; 42, second conductive connecting portion; 43, intermediate buffer portion. DETAILED DESCRIPTION

[0043] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] In the description of the present invention, it should be understood that the terms "upper", "lower", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. It should be noted that when a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a centrally arranged component at the same time.

[0045] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0046] The embodiment of the present invention provides a battery, which can effectively prevent the battery module 100 from being pushed out of position by the connecting member under the action of the expansion force of the battery cell 101, thereby improving the safety of the battery.

[0047] See also Figures 1 to 15 The battery includes a first connector 11 for connecting two adjacent battery cell modules 100 ; the first connector 11 is used to connect the two battery cell modules 100 to maintain the relative position between the two adjacent battery cell modules 100 .

[0048] The first connector 11 includes a first connector 111, a second connector 112 and a buffer connector 113; the two opposite ends of the buffer connector 113 are respectively connected to the first connector 111 and the second connector 112, and a bending structure is formed at the connection between the buffer connector 113 and the first connector 111, and a bending structure is formed at the connection between the buffer connector 113 and the second connector 112. The existence of the bending structure will make the first connector 11 easier to bend, thereby changing the distance between the two opposite ends of the first connector 11. It should also be noted that at least two first connectors 11 are generally used to connect two adjacent battery modules 100 to improve the stability of the connection.

[0049] When the battery cells in the battery cell module 100 expand, the two adjacent battery cell modules 100 will conduct force to the first connector 11. When the extrusion force on both ends of the first connector 11 is greater than a certain value, it will bend further from the bending structure, thereby shortening the length of the first connector 11, thereby preventing one of the battery cell modules 100 from being pushed out of position due to excessive thrust. In this embodiment, the first connector 11 is equivalent to forming a buffer structure through a clever structural setting, which can reserve buffer space for the expansion of the battery cell 101 and always maintain the connection between the two adjacent battery cell modules 100. Preferably, the buffer connection portion 113 is arc-shaped, and when the bending structure is subjected to excessive force, the arc bending degree of the buffer connection portion 113 will increase.

[0050] Optionally, the battery also includes a second connecting member 12; the second connecting member 12 is provided with four mounting connection holes 121 arranged in a circular array around the center point of the second connecting member 12, and each mounting connection hole 121 is used to connect an independent battery cell module 100; a raised reinforcement portion 122 is formed between two adjacent mounting connection holes 121, and the ends of all the reinforcement portions 122 close to the center point are connected to each other.

[0051] Specifically, a plurality of battery cell modules 100 are arranged in a rectangular array around the second connector 12, and the second connector 12 can well maintain the relative positions of four adjacent battery cell modules 100. It should be further explained that the second connector 12 cooperates with the first connector 11 to maintain the position of each battery cell module 100 while forming a buffering effect for two adjacent battery cell modules 100 through the first connector 11, thereby avoiding excessive displacement of some battery cell modules 100 due to the expansion force of the battery cell 101, thereby further improving the safety of the battery. It should also be supplemented that the second connector 12 further strengthens the connection between the battery cell modules 100, that is, the battery cell modules 100 can be connected to form an integral structure, thereby improving the overall strength and overall stability of the battery. It should also be supplemented that at least one first connector 11 is connected between two adjacent battery cell modules 100 in the same column. Figure 4 In this embodiment, the direction of the column is from top to bottom or from bottom to top, and the direction of the row is from left to right or from right to left.

[0052] Optionally, both the buffer connection part 113 and the second connection part 12 are provided with a through-going tie mounting hole 114. On the one hand, the setting of the tie mounting hole 114 makes it easier for the buffer connection part 113 to undergo elastic deformation and elastic bending; on the other hand, the setting of the tie mounting hole 114 enables the tie to pass through the tie mounting hole 114 to fasten and fix the wire harness on the buffer connection part 113, which is beneficial to optimize the battery routing structure. Both the buffer connection part 113 and the second connection part 12 are provided with a tie mounting hole 114, so that the tie can bind the battery wire harness to the buffer connection part 113 and the second connection part 12, thereby improving the fixing effect of the wire harness and preventing the wire harness from being too messy.

[0053] Optionally, the battery cell module 100 includes an end plate 21, and the end plate 21 is provided with a first fastening hole for connecting the first connecting member 11 and a second fastening hole for connecting the second connecting member 12; the end plates 21 are provided at both opposite ends of the battery cell module 100. Specifically, the opposite ends of the first connecting portion 111 are respectively fixedly connected to the end plates 21 of different battery cell modules 100, that is, the purpose of connecting two adjacent battery cell modules 100 is achieved. Preferably, the buffer connection portion 113 is a material that is more prone to elastic deformation, and the first connection portion 111 and the second connection portion 112 are less prone to elastic deformation relative to the buffer connection portion 113. It should also be particularly noted that under the pressure of the battery cell module 100, the bending structure bends, thereby causing the buffer connection portion 113 to further bend and deform.

[0054] Optionally, the battery further includes four battery cell modules 100, the second connector 12 is disposed in the middle of the four battery cell modules 100, and the first connector 11 is disposed around the second connector 12. Figure 4 and Figure 5 As shown, the second connector 12 is located in the middle of the four battery modules 100, and the first connector 11 is disposed between two adjacent battery modules 100. Figure 4 , that is, the first connecting members 11 are arranged on four directions of the second connecting member 12, thereby realizing the overall connection of the entire battery and improving the overall stability of the battery.

[0055] Optionally, the battery cell module 100 further includes a strapping band 102 and a plurality of battery cells 101 arranged in an array; the strapping band 102 bundles the battery cells 101 and the end plate 21 so that the end plate 21 and the battery cells 101 are relatively fixed. The two end plates 21 clamp the plurality of battery cells 101 in a rectangular array through the strapping band 102. After the second connector 12 is aligned with the first fastening hole 211 of the end plate 21 through the installation connection hole 121, the threaded fastener is screwed in to achieve a fixed connection.

[0056] Optionally, the buffer connection portion 113 is curved, so that the buffer connection portion 113 can be more easily elastically deformed under the squeezing of the battery modules 100 on both sides, which not only maintains a certain fixing effect, but also improves the overall safety of the battery, that is, one of the battery modules 100 is not easily pushed out of position.

[0057] Optionally, the battery includes an even number of pairs of battery cell modules 100; the battery cell module 100 includes a plurality of battery cell columns, each battery cell column includes an odd number of battery cells 101; the battery cells in the same battery cell module 100 are connected in series in a serpentine manner, and two adjacent battery cell modules 100 are connected in series via a connecting copper bar 4; in the same battery cell module 100, the connecting copper bar 4 of the incoming line and the connecting copper bar 4 of the outgoing line respectively connect two diagonal battery cells 101; wherein, one connecting copper bar 4 is the total positive output pole of the battery, and the other connecting copper bar 4 is the total negative output pole of the battery, and the total positive output pole and the total negative output pole are arranged side by side with an interval. The connecting copper bar 4 includes a first conductive connecting portion 41, a second conductive connecting portion 42 and an intermediate buffer portion 43, wherein the connection between the intermediate buffer portion 43 and the first conductive connecting portion 41 forms a bending structure, and the connection between the intermediate buffer portion 43 and the second conductive connecting portion 42 forms a bending structure. Specifically, as Figure 4 , Figure 5 , Figure 6 , Figure 7 , Fig. 9 As shown, a connecting copper bar 4 is respectively arranged at the diagonal of the battery cell module 100, so that the total negative output pole and the total positive output pole of the battery composed of an even number of battery cell modules 100 can be arranged adjacent to each other, which will greatly reduce the total length of the connecting copper bar 4 and maximize the bridging distance of the connecting copper bar 4, thereby helping to reduce the total internal resistance of the battery.

[0058] Optionally, two battery cells 101 connected in series are connected in series by using a series row 31 ; the series row 31 is provided with an arc-shaped buffer portion 313 , and two ends of the series row 31 are respectively connected to two adjacent battery cells 101 . Fig.13 is a schematic diagram of a three-dimensional structure of a series row 31, Fig.14 3 is a schematic diagram of the three-dimensional structure of another series row 31, the series row 31 includes an arc-shaped buffer portion 313 and a first series portion 311 and a second series portion 312 arranged at opposite ends of the arc-shaped buffer portion 313. In this embodiment, the first series portion 311 is welded and connected to the pole of the battery cell 101, and the second series portion 312 is welded and connected to the pole of another battery cell 101, so as to realize the series connection of two adjacent battery cells 101. Of course, the first series portion 311 can also be connected to the battery cell 101 in other ways, such as clamping, bonding or other ways. In this embodiment, the arc-shaped buffer portion 313 can effectively buffer the expansion force between two adjacent battery cells 101, that is, the expansion force acts on the arc-shaped buffer portion 313, so that the arc-shaped buffer portion 313 is curved, that is, the curvature of the arc-shaped buffer portion 313 changes, so as to better maintain the connection stability between adjacent battery cells 101.

[0059] It should be noted that the size of the series connection 31 used by the two battery cells 101 in two adjacent rows and the battery cells 101 in two adjacent columns is different to a certain extent. Fig.13 and Fig.14 It should be noted that there is a bending structure between the first series connection part 311 and the arc-shaped buffer part 313, and there is a bending structure between the second series connection part 312 and the arc-shaped buffer part 313, and when subjected to the squeezing force at both ends, the arc-shaped buffer part 313 bends relative to the first series connection part 311 and / or the second series connection part 312, thereby preventing one of the battery cells 101 from being pushed away from its original position.

[0060] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0061] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

[0062] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A battery, characterized in that: It comprises a first connecting member (11) for connecting two adjacent battery core modules (100); The first connecting member (11) comprises a first connecting portion (111), a second connecting portion (112) and a buffer connecting portion (113); opposite ends of the buffer connecting portion (113) are respectively connected to the first connecting portion (111) and the second connecting portion (112); a connection between the buffer connecting portion (113) and the first connecting portion (111) forms a bent structure, and a connection between the buffer connecting portion (113) and the second connecting portion (112) forms a bent structure.

2. The battery according to claim 1, characterized in that Also includes a second connecting member (12); The second connecting member (12) is provided with four mounting connection holes (121) arranged in a circular array around the center point of the second connecting member (12), each of the mounting connection holes (121) being used to connect an independent cell module (100); a raised reinforcement portion (122) is formed between two adjacent mounting connection holes (121), and all the reinforcement portions (122) are connected to each other at one end close to the center point.

3. The battery according to claim 2, characterized in that The buffer connection portion (113) and the second connection member (12) are both provided with a through-going cable tie mounting hole (114).

4. The battery according to claim 2, characterized in that The battery cell module (100) comprises an end plate (21), wherein the end plate (21) is provided with a first fastening hole for connecting the first connecting member (11) and a second fastening hole for connecting the second connecting member (12); The end plates (21) are provided at both opposite ends of the battery core module (100).

5. The battery according to claim 2, characterized in that It also comprises four battery cell modules (100), wherein the second connecting member (12) is arranged in the middle of the four battery cell modules (100), and the first connecting member (11) is arranged around the second connecting member (12).

6. The battery according to claim 4, characterized in that The battery cell module (100) further comprises a binding belt (102) and a plurality of battery cells (101) arranged in an array; The binding belt (102) binds the battery core (101) and the end plate (21) so that the end plate (21) and the battery core (101) are relatively fixed.

7. The battery according to claim 1, characterized in that The buffer connection portion (113) is curved in an arc shape.

8. The battery according to claim 2, characterized in that The battery comprises an even number of pairs of battery cell modules (100); the battery cell module (100) comprises a plurality of battery cell columns, each battery cell column comprising an odd number of battery cells (101); the battery cells (101) in the same battery cell module (100) are connected in series in a serpentine manner, and two adjacent battery cell modules (100) are connected in series via a connecting copper busbar (4); In the same battery cell module (100), the connecting copper bar (4) of the incoming line and the connecting copper bar (4) of the outgoing line are respectively connected to two diagonally opposite battery cells (101); wherein one connecting copper bar (4) is the total positive output pole of the battery, and the other connecting copper bar (4) is the total negative output pole of the battery, and the total positive output pole and the total negative output pole are arranged side by side with an interval.

9. The battery according to claim 8, characterized in that The connecting copper busbar (4) comprises a first conductive connecting portion (41), a second conductive connecting portion (42) and an intermediate buffer portion (43); a connection between the intermediate buffer portion (43) and the first conductive connecting portion (41) forms a bent structure, and a connection between the intermediate buffer portion (43) and the second conductive connecting portion (42) forms a bent structure.

10. The battery according to claim 1, characterized in that A series connection is achieved between two battery cells (101) connected in series by using a series connection row (31); the series connection row (31) is provided with an arc-shaped buffer portion (313), and two ends of the series connection row (31) are respectively connected to two adjacent battery cells (101).

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