Connecting piece, battery and vehicle

Abstract

The utility model provides a connecting piece, a battery and a vehicle, the connecting piece comprises a first surface and a second surface which are oppositely arranged, the first surface is provided with a first groove and a second groove, and the second surface is provided with a third groove and a fourth groove; wherein the first groove corresponds to the third groove, the second groove corresponds to the fourth groove, the first groove is communicated with the third groove through a first through hole, and the second groove is communicated with the fourth groove through a second through hole. According to the connecting piece, the anode column and the cathode column on the two sides of the battery cell can be connected at the same time, so that the battery only needs one connecting piece, and the number of parts of the battery and the overall cost of the battery can be reduced.

Description

Technical Field

[0001] The present application relates to vehicle manufacturing technology, and in particular, to a connecting piece, a battery, and a vehicle. Background Art

[0002] A battery is an important part of the new energy industry. The battery includes a plurality of battery cells arranged side by side. An anode post and a cathode post are respectively provided on both sides of the battery cell. The anode posts and cathode posts of two adjacent battery cells are arranged in a staggered manner. A connecting piece can electrically connect the anode post of one battery cell to the cathode post of another battery cell, thereby realizing the series connection of a plurality of battery cells.

[0003] Currently, the positions of the anode posts and cathode posts on both sides of the battery cell are not arranged in a one-to-one correspondence. Therefore, two different connecting pieces are required to connect the pole posts on both sides of the battery cell respectively, which increases the types of battery parts and is not conducive to reducing the battery cost. Summary of the Utility Model

[0004] In order to overcome the above defects in the related art, the purpose of the present application is to provide a connecting piece, a battery, and a vehicle. The connecting piece of the present application can simultaneously connect the anode posts and cathode posts on both sides of the battery cell. Therefore, only one type of connecting piece is required for the battery, which is conducive to reducing the number of battery parts and the overall cost of the battery.

[0005] On the one hand, the present application provides a connecting piece, including a first surface and a second surface arranged opposite to each other. A first groove and a second groove are provided on the first surface, and a third groove and a fourth groove are provided on the second surface; wherein, the first groove corresponds to the third groove, the second groove corresponds to the fourth groove, the first groove and the third groove are connected through a first through hole, and the second groove and the fourth groove are connected through a second through hole.

[0006] In a possible implementation manner, the depths of the first groove, the second groove, the third groove, and the fourth groove are all equal.

[0007] In a possible implementation manner, the depth of the first groove accounts for 20-30% of the thickness of the connecting piece.

[0008] In a possible implementation manner, the shapes of the first groove, the second groove, the third groove, and the fourth groove are all the same.

[0009] In a possible implementation manner, the first groove and the second groove are symmetrically arranged with respect to the center of the first surface.

[0010] In a possible implementation manner, the connecting piece is integrally formed.

[0011] In a possible implementation, the connecting piece includes a first sub-connecting piece and a second sub-connecting piece. The first surface is located on the first sub-connecting piece, the second surface is located on the second sub-connecting piece, and the first sub-connecting piece and the second sub-connecting piece are connected by a fastener.

[0012] In a possible implementation, the first sub-connecting piece includes a first inner surface opposite to the first surface, and the second sub-connecting piece includes a second inner surface opposite to the second surface; the fastener includes at least one buckle and at least one buckle hole. One of the buckle and the buckle hole is arranged on the first inner surface, and the other is arranged on the second inner surface. The first sub-connecting piece and the second sub-connecting piece are snap-connected through the buckle and the corresponding buckle hole.

[0013] On the other hand, the present application provides a battery, which includes a plurality of battery cells arranged side by side. Anode posts and cathode posts are respectively arranged on two sides of the battery cell, and the anode post of one battery cell and the cathode post of another adjacent battery cell are located on the same side. The anode post of the battery cell and the cathode post of another adjacent battery cell are connected by any one of the connecting pieces described above.

[0014] On yet another aspect, the present application provides a vehicle, which includes the battery described above.

[0015] The present application provides a connecting piece, a battery and a vehicle. The connecting piece includes a first surface and a second surface arranged opposite to each other. A first groove and a second groove are provided on the first surface, and a third groove and a fourth groove are provided on the second surface. Among them, the first groove corresponds to the third groove, and the second groove corresponds to the fourth groove. The first groove and the third groove are connected through a first through hole, and the second groove and the fourth groove are connected through a second through hole. In the present application, the first groove on the first surface is correspondingly arranged with the third groove on the second surface, the second groove on the first surface is correspondingly arranged with the fourth groove on the second surface, and the first groove and the third groove are connected through the first through hole, and the second groove and the fourth groove are connected through the second through hole. When the connecting piece is connected to the pole column on one side of the battery cell through the first surface, the first groove and the second groove can respectively fix the anode columns and cathode columns of two adjacent battery cells, and are welded to the corresponding anode columns and cathode columns through the first through hole and the second through hole respectively, realizing the electrical connection of two adjacent anode columns and cathode columns. After the connecting piece is turned over, the connecting piece can be connected to the pole column on the other side of the battery cell through the second surface. At this time, the third groove and the fourth groove can respectively fix the cathode columns and anode columns of two adjacent battery cells, and are welded to the corresponding cathode columns and anode columns through the first through hole and the second through hole respectively, realizing the electrical connection of two adjacent cathode columns and anode columns. It can be seen from the above description that the connecting piece of the present application can simultaneously realize the connection of the anode columns and cathode columns on both sides of the battery cell. Therefore, only one type of connecting piece is required for the battery, which is beneficial to reducing the number of parts of the battery and the overall cost of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following will briefly introduce the drawings required for use in the description of the embodiments or related technologies. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 is a structural schematic diagram of a connecting piece in related technologies from one perspective;

[0018] Figure 2 is a structural schematic diagram of a connecting piece in related technologies from another perspective;

[0019] Figure 3 is a structural schematic diagram of a connecting piece provided by an embodiment of the present application from one perspective;

[0020] Figure 4 is a structural schematic diagram of a connecting piece provided by an embodiment of the present application from another perspective;

[0021] Figure 5 is a structural schematic diagram of a connecting piece provided by another embodiment of the present application from one perspective;

[0022] Figure 6 Schematic diagram of the connecting piece provided in another embodiment of the present application from another perspective;

[0023] Figure 7 For Figure 5 schematic diagram of the first sub-connecting piece in

[0024] Figure 8 For Figure 5 schematic diagram of the second sub-connecting piece in

[0025] Reference numerals:

[0026] 10 - Connecting piece; 11 - First surface; 12 - Second surface; 13 - First connecting groove; 14 - Second connecting groove; 15 - First communication hole; 16 - Second communication hole;

[0027] 100 - Connecting piece;

[0028] 101 - First surface; 1011 - First groove; 1012 - Second groove;

[0029] 102 - Second surface; 1021 - Third groove; 1022 - Fourth groove;

[0030] 103 - First through hole; 104 - Second through hole;

[0031] 110 - First sub-connecting piece; 111 - First inner surface; 112 - Buckle; 1031 - First sub-through hole; 1041 - Second sub-through hole;

[0032] 120 - Second sub-connecting piece; 121 - Second inner surface; 122 - Card hole; 1032 - Third sub-through hole; 1042 - Fourth sub-through hole. Detailed implementation manners

[0033] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application.

[0034] All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the protection scope of the present application. Without conflict, the following embodiments and the features in the embodiments may be combined with each other.

[0035] As described in the background art, the battery in the solution of the related art requires two different connection plates to connect the anode posts and cathode posts on both sides of multiple battery cells respectively. Therefore, the types of battery parts are increased, which is not conducive to reducing the battery cost. The reason for the above problem is that: in the solution of the related art, the anode post and cathode post of the battery cell are not arranged at the center of the side of the battery cell; therefore, after multiple battery cells are placed side by side, the first side of multiple battery cells may present an alternating structure with the anode post at the bottom and the cathode post at the top (i.e., alternating one down and one up), while the second side of multiple battery cells is exactly the opposite, presenting an alternating structure with the cathode post at the top and the anode post at the bottom (i.e., alternating one up and one down).

[0036] Figure 1 is a schematic diagram of the structure of the connection plate in the related art from one perspective; Figure 2 is a schematic diagram of the structure of the connection plate in the related art from another perspective. As Figure 1 and Figure 2 shown, the connection plate 10 in the related art includes opposite first surface 11 and second surface 12. The first surface 11 is provided with a first connection groove 13 and a second connection groove 14. A first communication hole 15 communicating with the second surface 12 is provided at the bottom of the first connection groove 13, and a second communication hole 16 communicating with the second surface 12 is provided at the bottom of the second connection groove 14. When in use, the first surface 11 of the connection plate 10 faces one side of the battery cell, so that the first connection groove 13 and the second connection groove 14 are respectively matched with the anode post and cathode post of two adjacent battery cells on this side, and the adjacent two cathode posts and anode posts are electrically connected through the first communication hole 15 and the second communication hole 16. When it is necessary to connect the pole posts on the other side of the battery cell, since only the first communication hole 15 and the second communication hole 16 are provided on the second surface 12 of the connection plate 10, it cannot be matched with the anode post and cathode post on the other side of the battery cell, so it cannot be connected. It is necessary to design another connection plate to connect the pole posts on the other side of the battery cell, thus increasing the types of battery parts, which is not conducive to reducing the battery cost.

[0037] In addition, the preparation method of the connection plate 10 in the related art is to bend a metal plate. If it is not pressed tightly during bending, there may be a gap in the middle of the bent connection plate 10, resulting in a smaller cross-sectional area of the connection plate 10 and a safety risk of overheating during use.

[0038] In view of this, the embodiments of the present application aim to provide a connecting piece, a battery and a vehicle. By correspondingly arranging the first groove on the first surface of the connecting piece and the third groove on the second surface, and the second groove on the first surface and the fourth groove on the second surface, and connecting the first groove and the third groove through the first through hole, and connecting the second groove and the fourth groove through the second through hole. When the connecting piece is connected to the pole column on one side of the battery cell through the first surface, the first groove and the second groove can respectively fix the anode columns and cathode columns of two adjacent battery cells, and are respectively welded to the corresponding anode columns and cathode columns through the first through hole and the second through hole, realizing the electrical connection of two adjacent anode columns and cathode columns; after the connecting piece is flipped, the connecting piece can be connected to the pole column on the other side of the battery cell through the second surface. At this time, the third groove and the fourth groove can respectively fix the cathode columns and anode columns of two adjacent battery cells, and are welded to the corresponding cathode columns and anode columns through the first through hole and the second through hole, realizing the electrical connection of two adjacent cathode columns and anode columns. The connecting piece of the present application can simultaneously realize the connection of the anode columns and cathode columns on both sides of the battery cell. Therefore, only one type of connecting piece is required for the battery, which is beneficial to reducing the number of parts of the battery and the overall cost of the battery.

[0039] The content of the embodiments of the present application will be described in detail below with reference to the drawings, so that those skilled in the art can understand the content of the present application in more detail.

[0040] Figure 3 A structural schematic diagram of the connecting piece provided by an embodiment of the present application from one perspective; Figure 4 A structural schematic diagram of the connecting piece provided by an embodiment of the present application from another perspective; Figure 5 A structural schematic diagram of the connecting piece provided by another embodiment of the present application from one perspective; Figure 6 A structural schematic diagram of the connecting piece provided by another embodiment of the present application from another perspective; Figure 7 For Figure 5 The structural schematic diagram of the first sub-connecting piece in Figure 8 For Figure 5 The structural schematic diagram of the second sub-connecting piece in

[0041] Please refer to Figures 3 - 8 As shown in, this embodiment provides a connecting piece 100, which includes a first surface 101 and a second surface 102 arranged opposite to each other. Exemplarily, the connecting piece 100 is in the shape of a thin sheet or a thin plate. The thickness of the connecting piece 100 is relatively small compared to its length and width. The first surface 101 and the second surface 102 are two surfaces opposite to each other in the thickness direction of the connecting piece 100. The connecting piece 100 can be made of a metal material such as aluminum or copper, for example, to ensure that the connecting piece 100 has good electrical conductivity.

[0042] In this embodiment, a first groove 1011 and a second groove 1012 are provided on the first surface 101, and a third groove 1021 and a fourth groove 1022 are provided on the second surface 102. Among them, the first groove 1011 corresponds to the third groove 1021, that is, the first groove 1011 and the third groove 1021 are oppositely arranged in the thickness direction of the connecting piece 100. The second groove 1012 corresponds to the fourth groove 1022, that is, the second groove 1012 and the fourth groove 1022 are oppositely arranged in the thickness direction of the connecting piece 100. The first groove 1011 and the third groove 1021 are connected through a first through hole 103, and the second groove 1012 and the fourth groove 1022 are connected through a second through hole 104. In this embodiment, the sizes of the first through hole 103 and the second through hole 104 are both adapted to the size of the battery cell pole. The distance between two grooves on the same surface (for example, the two first grooves 1011 and the second groove 1012 between the first surfaces 101) should be adapted to the distance between two adjacent cathode poles and anode poles on the same side of the battery cell, so as to ensure the connection between the connecting piece 100 and the battery cell.

[0043] Through the above structure, when the connecting piece 100 of this embodiment is connected to the pole on one side of the battery cell through the first surface 101, the first groove 1011 and the second groove 1012 can respectively fix the anode pole and the cathode pole of two adjacent battery cells, and are respectively welded to the corresponding anode pole and cathode pole through the first through hole 103 and the second through hole 104, so as to realize the electrical connection between two adjacent anode poles and cathode poles. After the connecting piece 100 is turned over, the connecting piece 100 can be connected to the pole on the other side of the battery cell through the second surface 102. At this time, the third groove 1021 and the fourth groove 1022 can respectively fix the cathode pole and the anode pole of two adjacent battery cells, and are welded to the corresponding cathode pole and anode pole through the first through hole 103 and the second through hole 104, so as to realize the electrical connection between two adjacent cathode poles and anode poles.

[0044] It can be seen from the above description that the connecting piece 100 of this embodiment can simultaneously realize the connection of the anode poles and cathode poles on both sides of the battery cell. Therefore, compared with the connecting piece in the related art, the connecting piece 100 of this embodiment can be made universal. Only one kind of connecting piece is needed for the battery adopting the connecting piece of this embodiment, which is beneficial to reducing the number of parts of the battery and the overall cost of the battery.

[0045] Please continue to refer to Figures 3 - 6, in order to ensure the consistency of performance when the connecting piece 100 is connected to the pole columns on both sides of the battery cell, in this embodiment, the depths of the first groove 1011, the second groove 1012, the third groove 1021, and the fourth groove 1022 can be made equal. In this way, when fixing the battery cell pole column, the first groove 1011, the second groove 1012, the third groove 1021, and the fourth groove 1022 can provide consistent fastening force to ensure that the connecting piece 100 can fix the battery cell pole column more stably.

[0046] Furthermore, the depth of the first groove 1011 in this embodiment accounts for 20 - 30% of the thickness of the connecting piece 100. Since the depths of the first groove 1011, the second groove 1012, the third groove 1021, and the fourth groove 1022 are equal, it can be understood that the depth of the second groove 1012 also accounts for 20 - 30% of the thickness of the connecting piece 100; the depth of the third groove 1021 also accounts for 20 - 30% of the thickness of the connecting piece 100; the depth of the fourth groove 1022 also accounts for 20 - 30% of the thickness of the connecting piece 100. For example, when the thickness of the connecting piece 100 is 2 mm, the depths of the first groove 1011, the second groove 1012, the third groove 1021, and the fourth groove 1022 can all be 0.5 mm, and the concave depth accounts for 25% of the thickness of the connecting piece 100. By limiting the depths of the first groove 1011, the second groove 1012, the third groove 1021, and the fourth groove 1022 within the above range, this embodiment ensures that the thickness of the connecting piece 100 at the first groove 1011, the second groove 1012, the third groove 1021, and the fourth groove 1022 meets the requirements for welding with the battery cell pole column.

[0047] Optionally, the shapes of the first groove 1011, the second groove 1012, the third groove 1021, and the fourth groove 1022 in this embodiment are the same. For example, they can all be in the shape of a circular groove or a kidney-shaped groove. By setting the shapes of the first groove 1011, the second groove 1012, the third groove 1021, and the fourth groove 1022 to be the same, it is convenient for processing.

[0048] Please continue to refer to Figures 3 - 6, in this embodiment, the first groove 1011 and the second groove 1012 are symmetrically arranged with respect to the center of the first surface 101; that is to say, after the connecting piece 100 rotates 180° around the center of the first surface 101, the first groove 1011 is in the position of the second groove 1012 before rotation, and the second groove 1012 is in the position of the first groove 1011 before rotation. Since the parameters such as the shape and size of the first groove 1011 and the second groove 1012 are the same, the connecting piece 100 after rotating 180° can still be used to connect with the electrode post of the battery cell, so that there is no need to install the connecting piece 100 on the battery cell in a specific orientation, which improves the convenience of connection.

[0049] Correspondingly, in this embodiment, the third groove 1021 and the fourth groove 1022 are symmetrically arranged with respect to the center of the second surface 102; that is to say, after the connecting piece 100 rotates 180° around the center of the second surface 102, the third groove 1021 is in the position of the fourth groove 1022 before rotation, and the fourth groove 1022 is in the position of the third groove 1021 before rotation. Since the parameters such as the shape and size of the third groove 1021 and the fourth groove 1022 are the same, the connecting piece 100 after rotating 180° can still be used to connect with the electrode post on the other side of the battery cell, so that there is no need to install the connecting piece 100 on the battery cell in a specific orientation, which improves the convenience of connection.

[0050] Please refer to Figure 3 and Figure 4 , in a possible implementation manner, the connecting piece 100 of this embodiment is integrally formed. Specifically, the connecting piece 100 can be prepared with the first groove 1011, the second groove 1012, the third groove 1021 and the fourth groove 1022 from a thin plate through processes such as pressing or stamping, and then the first through hole 103 and the second through hole 104 are formed by secondary stamping or drilling to connect the first groove 1011 and the third groove 1021, and connect the second groove 1012 and the fourth groove 1022 respectively. The process of integral forming is beneficial to improving the production rate of the connecting piece 100 and reducing the production cost.

[0051] Please continue to refer to Figures 5 - 8, in another possible embodiment, the connecting piece 100 of this embodiment includes a first sub-connecting piece 110 and a second sub-connecting piece 120; wherein, the first surface 101 is located on the first sub-connecting piece 110, and the second surface 102 is located on the second sub-connecting piece 120. The first sub-connecting piece 110 and the second sub-connecting piece 120 are connected by fasteners, so as to stably connect the first sub-connecting piece 110 and the second sub-connecting piece 120 together by means of the fasteners, and avoid generating gaps between the first sub-connecting piece 110 and the second sub-connecting piece 120. Compared with the solutions in the related art, this embodiment can ensure that the connecting piece 100 has a stable current-carrying area and prevent the safety risk of overheating during use.

[0052] Please continue to refer to Figure 7 and Figure 8 , in this embodiment, the first sub-connecting piece 110 includes a first inner surface 111 opposite to the first surface 101, and the second sub-connecting piece 120 includes a second inner surface 121 opposite to the second surface 102. A first sub-through hole 1031 and a second sub-through hole 1041 are formed on the first sub-connecting piece 110, and a third sub-through hole 1032 and a fourth sub-through hole 1042 are formed on the second sub-connecting piece 120. It can be understood that after the first sub-connecting piece 110 and the second sub-connecting piece 120 are integrally connected by fasteners, the first sub-through hole 1031 and the third sub-through hole 1032 together form a first through hole 103, and the second sub-through hole 1041 and the fourth sub-through hole 1042 together form a second through hole 104.

[0053] In this embodiment, the fasteners include at least one buckle 112 and at least one card hole 122. One of the buckle 112 and the card hole 122 is arranged on the first inner surface 111, and the other is arranged on the second inner surface 121. The first sub-connecting piece 110 and the second sub-connecting piece 120 are snap-connected by the buckle 112 and the corresponding card hole 122. For example, as Figure 7 and Figure 8 shown, the buckle 112 of this embodiment is arranged on the first inner surface 111, and the card hole 122 is arranged on the second inner surface 121. The first sub-connecting piece 110 and the second sub-connecting piece 120 of this embodiment are connected and fixed by a snap connection method, which is convenient for installation and disassembly. In this embodiment, the specific number of the buckle 112 and the card hole 122 can be selected according to actual connection needs. For example, it can be three, four, five, etc. The multiple buckles 112 and the multiple card holes 122 should be evenly distributed on the connecting piece 100 to ensure the stability of the connection at each place.

[0054] In other possible embodiments, the fasteners can also adopt the structure of male and female buttons, that is, a plurality of male buttons are formed on the first inner surface 111, and a plurality of female buttons are formed on the second inner surface 121. This structure can also achieve the snap connection of the first sub-connecting piece 110 and the second sub-connecting piece 120.

[0055] This embodiment also provides a battery, which includes a plurality of battery cells arranged side by side. An anode post and a cathode post are respectively provided on two sides of each battery cell, and the anode post of one battery cell and the cathode post of another adjacent battery cell are located on the same side. The anode post of a battery cell and the cathode post of another adjacent battery cell are connected by the above-mentioned connecting piece 100.

[0056] Specifically, the battery of this embodiment can be a cell-to-pack (CTP) battery, and a plurality of battery cells are directly placed in the battery box. After a plurality of battery cells are placed side by side, on the first side of the plurality of battery cells, an alternating structure with the anode post at the bottom and the cathode post at the top (i.e., alternating bottom and top) may be presented; while on the second side of the plurality of battery cells, it is exactly the opposite, presenting an alternating structure with the cathode post at the top and the anode post at the bottom (i.e., alternating top and bottom). Due to the adoption of the above-mentioned connecting piece 100, in this embodiment, on the first side of the plurality of battery cells, the anode post and the cathode post of two adjacent battery cells can be respectively fixed by the first groove 1011 and the second groove 1012 on the first surface 101 of the connecting piece 100, and are welded to the corresponding anode post and cathode post through the first through hole 103 and the second through hole 104 respectively, so as to realize the electrical connection of two adjacent anode posts and cathode posts. On the second side of the plurality of battery cells, the connecting piece 100 is flipped, and the cathode post and the anode post of two adjacent battery cells are respectively fixed by the third groove 1021 and the fourth groove 1022 on the second surface 102 of the connecting piece 100, and are welded to the corresponding cathode post and anode post through the first through hole 103 and the second through hole 104 respectively, so as to realize the electrical connection of two adjacent cathode posts and anode posts.

[0057] Thus, only one type of connecting piece 100 needs to be designed for the battery of this embodiment, which is beneficial to reducing the number of parts of the battery and the overall cost of the battery.

[0058] This embodiment also provides a vehicle, which includes the above-mentioned battery.

[0059] Specifically, the vehicle of this embodiment can be, for example, a pure electric vehicle or a hybrid vehicle. The vehicle includes a chassis, and the battery can be fixed on the chassis. The battery outputs driving force to the wheels through a corresponding power transmission mechanism to drive the vehicle to travel.

[0060] Since the vehicle of this embodiment adopts the above-mentioned battery, only one type of connecting piece needs to be designed in the battery, which is beneficial to reducing the number of parts of the vehicle and the overall cost of the vehicle.

[0061] In the description of the present application, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present application 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 thus should not be construed as a limitation to the present application.

[0062] In the present application, unless otherwise clearly specified and limited, the terms "mounted", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0063] It should be noted that in the description of the present application, the terms "first" and "second" are only used for conveniently describing different components, and should not be understood as indicating or implying an order relationship, relative importance, or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature.

[0064] The embodiments or implementation manners in the present application are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts among the various embodiments can be referred to each other.

[0065] In the description of the present application, the descriptions referring to the terms "one implementation manner", "some implementation manners", "illustrative implementation manners", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the implementation manner or example are included in at least one implementation manner or example of the present application. In the present application, the schematic expressions of the above terms do not necessarily refer to the same implementation manner or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more implementation manners or examples.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A connecting piece (100), characterized in that, It includes a first surface (101) and a second surface (102) which are oppositely arranged. A first groove (1011) and a second groove (1012) are provided on the first surface (101), and a third groove (1021) and a fourth groove (1022) are provided on the second surface (102); wherein, the first groove (1011) corresponds to the third groove (1021), the second groove (1012) corresponds to the fourth groove (1022), the first groove (1011) and the third groove (1021) are connected through a first through hole (103), and the second groove (1012) and the fourth groove (1022) are connected through a second through hole (104).

2. The connecting piece (100) according to claim 1, characterized in that, The depths of the first groove (1011), the second groove (1012), the third groove (1021) and the fourth groove (1022) are all equal.

3. The connecting piece (100) according to claim 2, characterized in that, The depth of the first groove (1011) accounts for 20 - 30% of the thickness of the connecting piece (100).

4. The connecting piece (100) according to claim 2, characterized in that, The shapes of the first groove (1011), the second groove (1012), the third groove (1021) and the fourth groove (1022) are all the same.

5. The connecting piece (100) according to claim 1, characterized in that, The first groove (1011) and the second groove (1012) are symmetrically arranged with respect to the center of the first surface (101).

6. The connecting piece (100) according to any one of claims 1-5, characterized in that, The connecting piece (100) is integrally formed.

7. The connecting piece (100) according to any one of claims 1-5, characterized in that, The connecting piece (100) includes a first sub - connecting piece (110) and a second sub - connecting piece (120). The first surface (101) is located on the first sub - connecting piece (110), the second surface (102) is located on the second sub - connecting piece (120), and the first sub - connecting piece (110) and the second sub - connecting piece (120) are connected by fasteners.

8. The connecting piece (100) according to claim 7, characterized in that, The first sub - connecting piece (110) includes a first inner surface (111) opposite to the first surface (101), and the second sub - connecting piece (120) includes a second inner surface (121) opposite to the second surface (102); the fasteners include at least one buckle (112) and at least one locking hole (122). One of the buckle (112) and the locking hole (122) is provided on the first inner surface (111), and the other is provided on the second inner surface (121). The first sub - connecting piece (110) and the second sub - connecting piece (120) are snap - connected through the buckle (112) and the corresponding locking hole (122).

9. A battery, characterized in that, It includes a plurality of battery cells arranged side by side. Anode posts and cathode posts are respectively provided on both sides of the battery cell, and the anode post of one battery cell and the cathode post of another adjacent battery cell are on the same side. The anode post of the battery cell and the cathode post of another adjacent battery cell are connected by the connecting piece (100) as described in any one of claims 1 - 8.

10. A vehicle, characterized in that, It includes a battery as described in claim 9.

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