Battery module and battery

Abstract

The utility model provides a battery module and a battery, and relates to the technical field of batteries, the battery module comprises a connecting bar and a plurality of battery cells, the plurality of battery cells are used for being arranged in a box body frame, and the top end of each battery cell is provided with a positive pole; the connecting bar comprises a plurality of connecting pieces, each connecting piece comprises a first plate part and a second plate part which are connected, one end of each first plate part is provided with a limiting clamping structure, and the multiple limiting clamping structures are used for being clamped on the multiple positive poles in a one-to-one correspondence mode so that the first plate parts can be clamped on the corresponding positive poles, and the second plate parts can be clamped on the corresponding positive poles in a one-to-one correspondence mode. And the second plate part of each connecting sheet is connected to the negative electrode structure of the adjacent battery cell. Compared with the prior art, the battery module provided by the utility model has the advantages that the limiting and fixing of the connecting piece and the positive pole column are realized through the limiting and clamping structure, and the fixing and limiting of the connecting piece and the battery cell can be realized through the connecting piece, so that a positioning piece is omitted, the mounting process is simplified, mutual restriction of all parts is fully utilized, and the cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and more specifically, to a battery module and a battery. Background Art

[0002] After research by the inventor, it is found that at present, most of the electrical connection bars and battery cells are fixed by welding. However, since the electrical connection bar needs to be kept fixed during welding, additional positioning parts need to be provided during the assembly process, increasing multiple processes and lengthening the production time. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a battery module which can realize the fixed limit with the battery cell through the connection piece itself, eliminating the positioning part, simplifying the installation process, making full use of the mutual restriction of each component, and saving costs.

[0004] The embodiments of the utility model are implemented as follows:

[0005] In a first aspect, an embodiment of the utility model provides a battery module, including a connection bar and a plurality of battery cells. The plurality of battery cells are configured to be arranged in a box frame, and a positive electrode column is provided at the top end of each battery cell. The connection bar includes a plurality of connection pieces, each connection piece includes a connected first plate portion and a second plate portion. One end of the first plate portion is provided with a limiting and clamping structure, and the plurality of limiting and clamping structures are used to clamp onto the plurality of positive electrode columns one by one, so that the first plate portion is clamped onto the corresponding positive electrode column, and the second plate portion of each connection piece is connected to the negative electrode structure of the adjacent battery cell.

[0006] In an optional embodiment, the limiting and clamping structure is a circular structure and is used in cooperation with the positive electrode column, and the limiting and clamping structure rotates 360° around the positive electrode column.

[0007] In an optional embodiment, each battery cell has an end shell at its top end. The end shell surrounds the positive electrode column, and the positive electrode column protrudes relative to the end shell to form a positive electrode structure. The end shell is used to form the negative electrode structure. The first plate portion of each connection piece fits on the top end of the corresponding positive electrode column and is clamped and positioned on the corresponding positive electrode column through the limiting and clamping structure. The second plate portion is connected to the end shell of the adjacent battery cell, and the connection piece is electrically isolated from the end shell around the corresponding positive electrode column.

[0008] In an optional embodiment, the limiting and clamping structure includes a positioning convex portion. The positioning convex portion is provided on the side of the first plate portion facing the positive electrode column. A positioning groove is formed on the end face of the positive electrode column, and the positioning convex portion is correspondingly clamped in the positioning groove.

[0009] In an alternative embodiment, the limiting and clamping structure includes a positioning collar, which is annularly convex on the side of the first plate portion facing the positive electrode column and correspondingly sleeved on the outer peripheral surface of the positive electrode column.

[0010] In an alternative embodiment, a first support foam is provided on the end face of the positioning collar, and the first support foam is attached to the surface of the end shell.

[0011] In an alternative embodiment, the first plate portion of each connecting piece is spaced from the end shell around the corresponding positive electrode column, so as to form an isolation gap between the first plate portion and the end shell around the corresponding positive electrode column.

[0012] In an alternative embodiment, a second support foam is provided at the isolation gap, and the second support foam is provided between the first plate portion and the end shell.

[0013] In an alternative embodiment, an insulating sheet is further provided between two adjacent battery cells, and the insulating sheet is connected to the second support foam.

[0014] In a second aspect, an embodiment of the present invention provides a battery, including a box frame and the battery module as described above installed in the box frame. A plurality of positioning grooves are provided on the inner bottom surface of the box frame, and a plurality of the battery cells are correspondingly assembled in the positioning grooves.

[0015] The beneficial effects of the embodiments of the present invention include:

[0016] For the battery module and the battery provided by the present invention, a plurality of battery cells are installed in the box frame. Each battery cell is provided with a positive electrode column at the top. A plurality of connecting pieces are distributed on the top of the battery cells, and one end of each connecting piece is provided with a limiting and clamping structure, and is correspondingly clamped on the positive electrode column of the battery cell through the limiting and clamping structure, so that the connecting piece can be positioned and clamped on the positive electrode column to realize pre-positioning and facilitate welding. Compared with the prior art, for the battery module provided by the present invention, the limiting and fixing of the connecting piece and the positive electrode column are realized through the limiting and clamping structure, and the fixing and limiting with the battery cell can be realized through the connecting piece itself, eliminating the positioning parts, simplifying the installation process, making full use of the mutual restriction of each component, and saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 Schematic diagram of the structure of the battery module provided by the embodiment of the present invention installed in the box frame;

[0019] Figure 2 Schematic diagram of the assembly structure of the battery module provided by the embodiment of the present invention;

[0020] Figure 3 For Figure 1 Partial connection structure schematic diagram of two adjacent battery cells and the connection row in

[0021] Figure 4 For Figure 3 Front sectional view of

[0022] Figure 5 Partial connection structure schematic diagram of two adjacent battery cells and the connection row in another embodiment;

[0023] Figure 6 For Figure 5 Front sectional view of

[0024] Figure 7 Partial exploded view of the battery cell and the connection row in another embodiment.

[0025] Icon:

[0026] 100 - Battery module; 110 - Box frame; 130 - Connection row; 131 - Connection piece; 1311 - First plate part; 1313 - Second plate part; 150 - Battery cell; 151 - Positive electrode post; 153 - End shell; 155 - Positioning groove; 170 - Limit clamping structure; 171 - Positioning convex part; 175 - Positioning collar; 177 - First support foam; 178 - Second support foam; 179 - Insulating sheet. Detailed implementation manners

[0027] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated herein can be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the present invention claimed, but merely represents the selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0029] It should be noted that like reference numerals and letters refer to like items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0030] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present utility model is usually placed during use. It is only for the convenience of describing the present utility model 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. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0031] In addition, terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging vertically, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0032] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "arranged", "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. Specific embodiments

[0034] Please refer to Figures 1 to 4 , the embodiment of the present utility model provides a battery module 100, which can realize the fixed limit with the battery cell 150 through the connection piece 131 itself, eliminating the positioning part, simplifying the installation process, making full use of the mutual restriction of each component, and saving costs.

[0035] The battery module 100 provided by an embodiment of the present utility model includes a connection row 130 and a plurality of battery cells 150. The plurality of battery cells 150 are configured to be arranged in a box frame 110, and a positive electrode post 151 is provided at the top end of each battery cell 150. The connection row 130 includes a plurality of connection pieces 131. Each connection piece 131 includes a first plate portion 1311 and a second plate portion 1313 that are connected. A limiting and clamping structure 170 is provided at one end of the first plate portion 1311. The plurality of limiting and clamping structures 170 are configured to be respectively clamped on the plurality of positive electrode posts 151, so that the first plate portion 1311 is clamped on the corresponding positive electrode post 151, and the second plate portion 1313 of each connection piece 131 is connected to the negative electrode structure of an adjacent battery cell 150.

[0036] It should be noted that the battery module 100 is used to be installed and fixed in the box frame 110 of the battery. The plurality of battery cells 150 are preferably cylindrical battery cells 150, and their installation and fixing methods can refer to the existing modules of cylindrical battery cells 150. During actual assembly, first, after cleaning the box frame 110, the plurality of battery cells 150 are sequentially placed in the positioning grooves on the inner bottom surface of the box frame 110. A positive electrode post 151 is provided at the top end of each battery cell 150, and the positive electrode post 151 is a boss structure. Then, the plurality of connection pieces 131 are sequentially placed on the tops of the plurality of battery cells 150. A limiting and clamping structure 170 is provided at one end of each connection piece 131, and the limiting and clamping structure 170 is correspondingly clamped on the positive electrode post 151 of the battery cell 150, so that the connection piece 131 can be positioned and clamped on the positive electrode post 151 to achieve pre-positioning, and finally welding is performed. Since the limiting and fixing of the connection piece 131 and the positive electrode post 151 are realized through the limiting and clamping structure 170, the fixing and limiting with the battery cell 150 can be realized by the connection piece 131 itself, eliminating the positioning parts, thus simplifying the installation process, making full use of the mutual restraint of each component, and saving costs.

[0037] In some embodiments, the limiting and clamping structure 170 is a circular structure and is used in cooperation with the positive electrode post 151. The limiting and clamping structure 170 rotates 360° with the positive electrode post 151 as the center of the circle. Specifically, since the battery cell 150 is a cylindrical battery cell 150 and the positive electrode post 151 is a circular boss structure, the limiting and clamping structure 170 is set as a circular structure here, which can realize limiting in the radial direction while facilitating rotation in the circumferential direction, ensuring the assembly effect and facilitating the angle conversion of the edge battery cells 150.

[0038] Each cell 150 has an end cap 153 at its top. The end cap 153 surrounds the positive electrode post 151, and the positive electrode post 151 protrudes relative to the end cap 153 to form a positive electrode structure. The end cap 153 is used to form a negative electrode structure. The first plate portion 1311 of each connecting piece 131 is attached to the top of the corresponding positive electrode post 151 and is clamped and positioned on the corresponding positive electrode post 151 through a limiting clamping structure 170. The second plate portion 1313 is connected to the end cap 153 of the adjacent cell 150, and the connecting piece 131 is electrically isolated from the end cap 153 around the corresponding positive electrode post 151. Specifically, there is a height difference between the positive and negative electrodes of the cell, that is, the positive electrode post 151 protrudes from the end cap 153. Therefore, the first plate portion 1311 and the second plate portion 1313 can be respectively arranged on the positive electrode post 151 and the end cap 153 of the adjacent cell 150.

[0039] See Figure 3 and Figure 4 , in some embodiments, the limiting clamping structure 170 includes a positioning convex portion 171. The positioning convex portion 171 is arranged on the side of the first plate portion 1311 facing the positive electrode post 151. A positioning groove 155 is formed on the end face of the positive electrode post 151, and the positioning convex portion 171 is correspondingly clamped in the positioning groove 155. Specifically, the positive electrode post 151 is annularly protruded at the center position of the end cover and forms a positioning groove 155 structure. The depth of the positioning groove 155 can be the same as the height of the positive electrode post 151 relative to the end cover. The shape and size of the positioning convex portion 171 are adapted to the shape of the positioning groove 155, so that the positioning convex portion 171 can be exactly clamped in the positioning groove 155 to achieve clamping connection with the positive electrode post 151 and ensure the fixing effect.

[0040] It should be noted that the positioning convex portion 171 is integrally arranged on the surface of the first plate portion 1311, and both the positioning convex portion 171 and the first plate portion 1311 are made of conductive metal materials, such as copper sheets. The positioning convex portion 171 and the first plate portion 1311 are both in contact with the positive electrode post 151, so as to ensure good electrical connection characteristics.

[0041] Furthermore, the positioning convex portion 171 can be a stamping concave portion structure, that is, the area of the first plate portion 1311 corresponding to the positive electrode post 151 is stamped to form the positioning convex portion 171. The bottom surface of the positioning convex portion 171 is attached to the inner bottom surface of the positioning groove 155 on the positive electrode post 151, so as to achieve good electrical connection. At the same time, the positioning convex portion 171 and the positioning groove 155 can form a limiting structure, and both the positioning convex portion 171 and the positioning groove 155 are circular structures, so that the first plate portion 1311 can rotate 360° around the positive electrode post 151 and can only extend radially to the outside, thus ensuring that the second plate portion 1313 can only overlap the negative electrode of another cell 150 and will not be connected to the negative electrode of its own cell 150.

[0042] See Figures 5 to 7 In some other preferred embodiments, the limiting and clamping structure 170 includes a positioning collar 175 which is annularly convex on the side of the first plate portion 1311 facing the positive electrode post 151 and is correspondingly sleeved on the outer peripheral surface of the positive electrode post 151. Specifically, the positive electrode post 151 has a conventional cylindrical boss structure, and the shape and size of the positioning collar 175 are adapted to the positive electrode post 151, so that the positioning collar 175 can be correspondingly sleeved on the outer peripheral surface of the positive electrode post 151 to achieve horizontal radial limitation.

[0043] Furthermore, the positioning collar 175 can be integrally provided on the bottom surface of the first plate portion 1311 and is annular, and the positive electrode post 151 is also in the shape of a cylindrical platform, so that the first plate portion 1311 can rotate 360° around the positive electrode post 151. And the protruding height of the positioning collar 175 relative to the first plate portion 1311 is adapted to the protruding height of the positive electrode post 151 relative to the end housing 153, so that the positioning collar 175 can be exactly sleeved on the positive electrode post 151, and the top surface of the positive electrode post 151 can be attached to the first plate portion 1311 to ensure the electrical connection effect.

[0044] In some embodiments, a first support foam 177 is provided on the end face of the positioning collar 175, and the first support foam 177 is attached to the surface of the end housing 153. Specifically, the first support foam 177 is made of an insulating material. The first support foam 177 is attached to the surface of the end housing 153, which can prevent the positioning collar 175 from making electrical contact with the end housing 153, thereby preventing short circuit. On the other hand, the setting of the first support foam 177 can also prevent the first plate portion 1311 and the second plate portion 1313 from tilting at the positive electrode end due to unstable center of gravity.

[0045] In some embodiments, the first plate portion 1311 of each connecting piece 131 is spaced from the end housing 153 around the corresponding positive electrode post 151, so as to form an isolation gap between the first plate portion 1311 and the end housing 153 around the corresponding positive electrode post 151. Specifically, the first plate portion 1311 overlaps on the end face of the positive electrode post 151 and horizontally extends towards the adjacent battery cell 150, so that the first plate portion 1311 can be spaced from the end housing 153 around the positive electrode post 151 and form an air layer to prevent the first plate portion 1311 from short-circuiting with the end housing 153 around the positive electrode post 151.

[0046] In some embodiments, a second support foam 178 is provided at the isolation gap, and the second support foam 178 is disposed between the first plate portion 1311 and the end housing 153. Specifically, the second support foam 178 is also made of an insulating material. On the one hand, the second support foam 178 can isolate the first plate portion 1311 and the end housing 153 to prevent short circuit. On the other hand, the second support foam 178 can play an intermediate support role to prevent the first plate portion 1311 from tilting due to unstable center of gravity between the first plate portion 1311 and the second plate portion 1313.

[0047] In some embodiments, an insulating sheet 179 is further provided between two adjacent battery cells 150, and the insulating sheet 179 is connected to the second support foam 178. Specifically, the insulating sheet 179 can be a PC sheet, and the PC sheet can be distributed on the bottom side of the second support foam 178 and on the side wall of the battery cell 150 corresponding to the bent portion of the connection row 130. By providing the insulating sheet 179, the connection row 130 and the end housing 153 can be further isolated to prevent short circuit.

[0048] Please refer to Figure 2 , an embodiment of the present invention further provides a battery, including a box frame 110 and a battery module 100 installed in the box frame 110. The battery module 100 includes a connection row 130 and a plurality of battery cells 150. A positive electrode post 151 is provided at the top end of each battery cell 150; the connection row 130 includes a plurality of connection pieces 131, and each connection piece 131 includes a connected first plate portion 1311 and a second plate portion 1313. A limiting and clamping structure 170 is provided at one end of the first plate portion 1311, and the plurality of limiting and clamping structures 170 are used to clamp onto the plurality of positive electrode posts 151 one by one, so that the first plate portion 1311 is clamped onto the corresponding positive electrode post 151, and the second plate portion 1313 of each connection piece 131 is connected to the negative electrode structure of the adjacent battery cell 150. A plurality of positioning grooves are provided on the inner bottom surface of the box frame 110, and the plurality of battery cells 150 are assembled in the positioning grooves one by one.

[0049] In summary, for the battery module 100 and the battery provided by the embodiment of the present invention, a plurality of battery cells 150 are installed in the box frame 110. A positive electrode post 151 is provided at the top end of each battery cell 150. The plurality of connection pieces 131 are distributed on the top of the battery cells 150. One end of each connection piece 131 is provided with a limiting and clamping structure 170, and the limiting and clamping structure 170 is correspondingly clamped onto the positive electrode post 151 of the battery cell 150, so that the connection piece 131 can be positioned and clamped onto the positive electrode post 151 to achieve pre-positioning, which is convenient for welding. The limiting and fixing of the connection piece 131 and the positive electrode post 151 are realized through the limiting and clamping structure 170, and the fixing and limiting with the battery cell 150 can be realized by the connection piece 131 itself, eliminating the positioning parts, simplifying the installation process, making full use of the mutual restraint of each component, and saving costs.

[0050] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, various modifications and variations can be made to the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A battery module, characterized in that: The invention comprises a connection row (130) and a plurality of battery cells (150), wherein the plurality of battery cells (150) are used to be arranged in a box frame (110), and a positive electrode column (151) is arranged at the top of each battery cell (150); the connection row (130) comprises a plurality of connection sheets (131), and each connection sheet (131) comprises a first plate portion (1311) and a second plate portion (1313) connected to each other, and a limiting clamping structure (170) is arranged at one end of the first plate portion (1311), and the plurality of limiting clamping structures (170) are used to be clamped on the plurality of positive electrode columns (151) in a one-to-one correspondence, so that the first plate portion (1311) is clamped on the corresponding positive electrode column (151), and the second plate portion (1313) of each connection sheet (131) is connected to the negative electrode structure of the adjacent battery cell (150).

2. The battery module according to claim 1, characterized in that: The position-limiting clamping structure (170) is a circular structure and is used in conjunction with the positive pole (151); the position-limiting clamping structure (170) rotates 360° with the positive pole (151) as the center of the circle.

3. The battery module according to claim 2, characterized in that: The top end of each battery cell (150) is provided with an end shell (153), the end shell (153) is arranged around the positive electrode column (151), and the positive electrode column (151) is protruded relative to the end shell (153) to form a positive electrode structure, and the end shell (153) is used to form the negative electrode structure, the first plate portion (1311) of each connecting piece (131) is attached to the top end of the corresponding positive electrode column (151), and is clamped and positioned on the corresponding positive electrode column (151) by the limiting clamping structure (170), the second plate portion (1313) is connected to the end shell (153) of the adjacent battery cell (150), and the connecting piece (131) is electrically isolated from the end shell (153) around the corresponding positive electrode column (151).

4. The battery module according to claim 3, characterized in that: The position limiting clamping structure (170) comprises a positioning protrusion (171), the positioning protrusion (171) being arranged on a side of the first plate portion (1311) facing the positive electrode column (151), the end surface of the positive electrode column (151) being provided with a positioning groove (155), and the positioning protrusion (171) being correspondingly clamped in the positioning groove (155).

5. The battery module according to claim 3, characterized in that: The position-limiting clamping structure (170) comprises a positioning collar (175), which is annularly convexly arranged on a side of the first plate portion (1311) facing the positive pole (151) and correspondingly clamped on the outer peripheral surface of the positive pole (151).

6. The battery module according to claim 5, characterized in that: The end surface of the positioning ring (175) is provided with a first supporting foam (177), and the first supporting foam (177) is attached to the surface of the end shell (153).

7. The battery module according to claim 3, characterized in that: The first plate portion (1311) of each connecting piece (131) is spaced apart from the end shell (153) around the corresponding positive electrode column (151), so that an isolation gap is formed between the first plate portion (1311) and the end shell (153) around the corresponding positive electrode column (151).

8. The battery module according to claim 7, characterized in that: A second supporting foam (178) is provided at the isolation gap, and the second supporting foam (178) is provided between the first plate portion (1311) and the end shell (153).

9. The battery module according to claim 8, characterized in that: An insulating sheet (179) is also provided between two adjacent battery cells (150), and the insulating sheet (179) is connected to the second supporting foam (178).

10. A battery, characterized in that: It comprises a box frame (110) and a battery module as claimed in any one of claims 1 to 9 installed in the box frame (110), wherein the inner bottom surface of the box frame (110) is provided with a plurality of positioning grooves, and the plurality of battery cells (150) are assembled in the positioning grooves in a one-to-one correspondence.

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