Battery module, battery pack and electric device

Abstract

The invention provides a battery module, a battery pack and a power utilization device, and relates to the technical field of batteries, the battery module comprises a battery cell group and a busbar cover plate assembly, the battery cell group comprises a plurality of battery cells arranged in sequence along a first direction, each battery cell comprises an electrode terminal, and the electrode terminal is provided with a clamping groove; the busbar cover plate assembly covers the surface, with the electrode terminals, of the battery cell group in the second direction, the busbar cover plate assembly comprises a cover plate main body and a plurality of busbars, the plurality of busbars are fixed to one side, facing the battery cell group, of the cover plate main body, and clamping pieces are arranged at the positions, corresponding to the electrode terminals, of the busbars; and the clamping piece is configured to be detachably clamped into the clamping groove and enable the busbar to be electrically connected with the electrode terminal. According to the battery module, the busbar and the electrode terminal are connected in a clamping manner, so that welding connection is omitted, mounting and dismounting are facilitated, the production efficiency of a production line is improved, later dismounting, mounting and maintenance of the battery module are also facilitated, and the after-sale cost is reduced.

Description

Technical Field

[0001] The present invention relates to the field of battery technology, and in particular to a battery module, a battery pack and an electrical device. Background Art

[0002] With the transformation of the global energy structure and the development of a low-carbon economy, the field of new energy has gradually become the focus of attention from all walks of life. As the core component of energy storage and conversion, batteries have been widely used in various fields, especially in the field of transportation such as electric vehicles.

[0003] In the prior art, the electrical connection between the cells in the battery module is usually achieved by welding the busbars to the cell poles. However, the existing welding electrical connection method results in low production efficiency and is inconvenient for later disassembly and maintenance. Summary of the invention

[0004] The purpose of the present application is to provide a battery module, a battery pack and an electrical device to solve the technical problems in the prior art that the electrical connection method between the battery cells in the battery module leads to low production efficiency of the production line and inconvenient disassembly and maintenance.

[0005] To achieve the above purpose, the technical solution adopted in this application is:

[0006] In a first aspect, the present application provides a battery module comprising: a cell group and a bus cover assembly, the cell group comprising a plurality of cells arranged in sequence along a first direction, the cells comprising electrode terminals, and the electrode terminals being provided with a card slot; the bus cover assembly being covered along a second direction to a surface of the cell group having the electrode terminals, the bus cover assembly comprising a cover body and a plurality of bus bars, the plurality of bus bars being fixed to a side of the cover body facing the cell group, a clamping piece being provided at a position of the bus bar corresponding to the electrode terminal, the clamping piece being configured to be detachably clamped into the card slot and electrically connecting the bus bar to the electrode terminal.

[0007] In one or more embodiments of the present application, a plurality of accommodating grooves for accommodating the busbars are provided on one side of the cover body facing the battery cell group, fixing members are provided in the accommodating grooves, and the busbars are fixed to the fixing members through the fixing holes to be fixed in the accommodating grooves.

[0008] In one or more embodiments of the present application, an elastic member is provided in the slot, and when the connector is connected to the slot, the elastic member clamps the connector and electrically connects the busbar to the electrode terminal.

[0009] In one or more embodiments of the present application, the electrode terminal includes a first connecting plate body and a second connecting plate body arranged at intervals, a connecting piece is provided between the first connecting plate body and the second connecting plate body, the interior of the connecting piece is a hollow structure to form a card slot, and an accommodating cavity is provided between the first connecting plate body and the second connecting plate body and located on the outer side of the connecting piece away from the card slot.

[0010] The connecting member is provided with a through hole penetrating the card slot and the accommodating cavity, a part of the structure of the elastic member passes through the through hole to form a clamping portion in the card slot, and a part of the structure of the elastic member is placed in the accommodating cavity;

[0011] The clamping piece is protruding from the surface of the busbar, and a clamping groove is arranged around the circumference of the clamping piece. When the clamping piece is clamped into the clamping groove, the clamping part of the elastic piece is clamped in the clamping groove and the busbar is electrically connected to the electrode terminal.

[0012] In one or more embodiments of the present application, the busbar cover assembly extends along a first direction and covers the surface of the battery cell group having the electrode terminals, and limit members are respectively provided at both ends of the cover body along the first direction. When the busbar cover assembly covers the surface of the battery cell group, the limit members of the cover body are limited on both sides of the battery cell group along the first direction.

[0013] In one or more embodiments of the present application, it also includes:

[0014] The fixing belt is fixed to the outer side of the battery cell group around the circumference of the battery cell group. The fixing belt includes a first belt body and a second belt body. One end of the first belt body and one end of the second belt body are connected by a first locking piece, and the other end of the first belt body and the other end of the second belt body are connected by a second locking piece.

[0015] In one or more embodiments of the present application, the first locking member includes a cavity and a first opening and a second opening passing through the cavity, one end of the first belt body and one end of the second belt body overlap relatively and are placed in the cavity, and the first locking member has a raised portion formed on one side of the cavity close to the first opening or the second opening, the raised portion has an arc-shaped structure and a sliding cavity is formed between the cavity, a stopper is provided in the sliding cavity close to the first opening or the second opening, and a rolling member is provided in the sliding cavity, and when the first belt body and the second belt body are placed in the cavity, the rolling member abuts against the surface of the first belt body or the second belt body.

[0016] In one or more embodiments of the present application, the second locking member includes a locking buckle, the locking buckle is provided with a rotating shaft, the other end of the first belt body and the other end of the second belt body are provided with through holes allowing the rotating shaft to pass through, the second locking member is rotatably connected to the first belt body and the second belt body via the rotating shaft, the locking buckle is also provided with a snap ring, and the snap ring has a first state that locks the locking buckle and a second state that is open.

[0017] In the second aspect, the present application also provides a battery pack, comprising: a battery module according to any one of the first aspects and a bracket, the bracket having at least one installation cavity for accommodating the battery module, the battery module being installed in the installation cavity, a blocking block being provided at one end of the bracket along the first direction, a fixing buckle being provided at the other end of the bracket along the first direction, and a snap ring of the second locking member being snapped to the fixing buckle.

[0018] In a third aspect, the present application further provides an electrical device, comprising the battery pack described in the second aspect.

[0019] Based on the above technical solution, a battery module, a battery pack and an electric device of the present application have at least the following beneficial technical effects:

[0020] The electrical connection between the battery cells in the battery module of the embodiment of the present application can be formed by clamping the busbar's clamping parts into the clamping slots of the electrode terminals, eliminating the welding connection, facilitating installation and disassembly, reducing the time loss of production line changeover and production line production time, improving the production line production efficiency, and facilitating the later disassembly and maintenance of the battery module, reducing after-sales costs.

[0021] On the other hand, in the battery module of the embodiment of the present application, a fixing belt is fixed around the circumferential outer side of the battery cell group, and the fixing belt includes a first belt body and a second belt body. One end of the first belt body and the second belt body are connected by a first locking piece, and the other end of the first belt body and the other end of the second belt body are connected by a second locking piece, thereby eliminating the welding connection method, simplifying the production process, and facilitating disassembly and maintenance.

[0022] On the other hand, the battery pack of the embodiment of the present application includes the battery module, and the battery module can be assembled first and then installed on the bracket and fixed with the bracket. The installation is convenient and quick, which reduces the production cost of the battery pack and simplifies the process. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, 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 application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the battery module provided in this application.

[0025] Figure 2 It is a schematic diagram of the three-dimensional structure of the busbar cover assembly in the battery module provided in the present application.

[0026] Figure 3It is a schematic diagram of the structure of the busbar cover assembly (without the busbar) in the battery module provided in the present application.

[0027] Figure 4 It is a schematic diagram of the structure of the bus in the battery module provided in this application.

[0028] Figure 5 It is a schematic diagram of the three-dimensional structure of the battery cell in the battery module provided in this application.

[0029] Figure 6 It is a schematic diagram of the bottom-up structure of the battery module provided in this application.

[0030] Figure 7 yes Figure 6 Middle AA cross section.

[0031] Figure 8 yes Figure 7 Enlarged view of point A in the middle.

[0032] Fig. 9 It is a schematic diagram of the side structure of the battery cell top cover in the battery module of the present application.

[0033] Fig.10 yes Fig. 9 Middle BB cross section.

[0034] Fig.11 yes Fig. 9 Enlarged view of the middle part.

[0035] Fig.12 It is a schematic diagram of the three-dimensional structure of the battery module of the present application from another perspective.

[0036] Fig.13 It is a structural schematic diagram of one of the end plates in the battery module of the present application.

[0037] Fig.14 It is a schematic diagram of the three-dimensional structure of the fixing belt in the battery module of the present application.

[0038] Fig.15 It is a schematic diagram of the three-dimensional structure of the first locking member in the battery module of the present application.

[0039] Fig.16 It is a schematic diagram of the connection method between the first locking member and the first belt body and the second belt body in the battery module of the present application.

[0040] Fig.17 It is a schematic diagram of the three-dimensional structure of the second locking member in the battery module of the present application.

[0041] Fig.18 It is a schematic diagram of the three-dimensional structure of the battery pack of the present application.

[0042] Fig.19It is a schematic diagram of the three-dimensional structure of the battery pack of the present application from another perspective.

[0043] In the figure: 10-battery module; 11-cell group; 12-busbar cover assembly; 13-fixing belt; 14-first locking member; 15-second locking member; 16-end plate; 17-insulating pad; 20-bracket; 111-cell; 112-electrode terminal; 113-slot; 114-end cover; 115-elastic member; 121-cover body; 122-busbar; 123-giving groove; 131-first belt body; 132-second belt body; 133-through hole; 134-connecting end; 141-cavity; 142-first opening; 143-second opening; 144-raised portion; 1 45-stopper; 146-rolling member; 147-sliding cavity; 151-locking buckle; 152-clamping ring; 153-rotating shaft; 161-first limiting groove; 162-second limiting groove; 201-fixing buckle; 202-blocking block; 1120-first connecting plate; 1121-accommodating cavity; 1122-second connecting plate; 1123-connecting member; 1124-perforation; 1125-clamping portion; 1126-outer wall; 1211-accommodating groove; 1212-fixing member; 1213-limiting member; 1221-clamping member; 1222-fixing hole; 1223-clamping groove. DETAILED DESCRIPTION

[0044] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0045] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0046] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0047] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0048] In the related art, the electrical connection between two adjacent cells in a battery module is usually achieved by welding between the bus and the electrode terminals of the cell. However, this connection method has the following disadvantages: 1. Different products have different welding parameters, resulting in a long time for adjusting the equipment of the product changeover production line. 2. The welding connection has high requirements on the cleanliness of the appearance of the parts, and the production line consumes more man-hours. 3. The welding connection is prone to poor welding phenomena such as cold welding and bursting points, which may cause the entire battery module or even the battery pack to be scrapped, resulting in high loss costs.

[0049] Based on the above considerations, in order to solve the technical problems in the prior art that the electrical connection method between the battery cells in the battery module leads to low production efficiency of the production line and inconvenient disassembly and maintenance. The present application provides a battery module, including a battery cell group and a busbar cover assembly, the battery cell group includes a plurality of battery cells arranged in sequence along a first direction, the battery cells include electrode terminals, and the electrode terminals are provided with a card slot; the busbar cover assembly is covered on the surface of the battery cell group with the electrode terminals along the second direction, the busbar cover assembly includes a cover body and a plurality of busbars, the plurality of busbars are fixed to the side of the cover body facing the battery cell group, and a clamping piece is provided at the position of the busbar corresponding to the electrode terminal, and the clamping piece is configured to be detachably clamped into the card slot and electrically connect the busbar to the electrode terminal.

[0050] In the technical solution of the present application, the battery cells are electrically connected to the electrode terminal slots through the busbar's clips, eliminating welding connections, facilitating installation and disassembly, reducing the time loss of production line changeover and production line production time, improving production line production efficiency, facilitating later disassembly and maintenance of the battery module, and reducing after-sales costs.

[0051] The battery module of the present application refers to a module including one or more battery cells connected in series or in parallel. A battery pack refers to a physical module including one or more battery modules to provide higher voltage and capacity. The battery pack disclosed in the present application is suitable for various electrical devices using batteries, and the electrical devices may be but are not limited to mobile phones, tablets, laptops, electric toys, electric tools, battery cars, electric cars, ships, spacecraft, and the like. Among them, electric toys may include fixed or mobile electric toys, for example, game consoles, electric car toys, electric ship toys, electric airplane toys, and the like, and spacecraft may include airplanes, rockets, space shuttles, spacecraft, and the like.

[0052] The technical solution of the present application is described in detail below in conjunction with the accompanying drawings.

[0053] Please refer to Figures 1 to 5 The embodiment of the present application provides a battery module 10, including a battery cell group 11 and a busbar cover assembly 12, the battery cell group 11 includes a plurality of battery cells 111 arranged in sequence along a first direction X, the battery cells 111 include electrode terminals 112, and the electrode terminals 112 are provided with a card slot 113; the busbar cover assembly 12 is covered on the surface of the battery cell group 11 with the electrode terminals 112 along a second direction Y, the busbar cover assembly 12 includes a cover body 121 and a plurality of busbars 122, the plurality of busbars 122 are fixed to a side of the cover body 121 facing the battery cell group 11, and a clamping piece 1221 is provided at a position of the busbar 122 corresponding to the electrode terminal 112, and the clamping piece 1221 is configured to be detachably clamped into the card slot 113 and electrically connect the busbar 122 to the electrode terminal 112.

[0054] Among them, the first direction X can be the length direction of the battery module 10, and the second direction Y can be the height direction of the battery module 10. The battery cell group 11 can be a structural member in which a plurality of battery cells 111 are stacked in sequence along the first direction X, that is, the length direction. The electrode terminal 112 can also be called a pole, and the card slot 113 is a groove structure formed by the concave surface of the electrode terminal 112. The busbar cover assembly 12 is arranged on one side of the second direction Y, that is, the height direction of the battery cell group 11, so as to electrically connect two adjacent battery cells 111 through the busbar 122 on the busbar cover assembly 12. The cover body 121 is used to integrate all the busbars 122, so that when installing, the cover body 121 can be directly covered on the electrode terminal 112 side of the battery cell group 11, and the electrical connection between the busbar 122 and the electrode terminal 112 can be realized by snapping the clamping member 1221 on each busbar 122 into the card slot 113, without installing the busbars 122 one by one.

[0055] In the technical solution of the embodiment of the present application, an electrical connection can be formed by a detachable snap-in connection between the snap-in piece 1221 of the bus 122 and the snap-in slot 113 of the electrode terminal 112, thereby eliminating the welding connection, facilitating installation and disassembly, reducing the time loss of production line changeover and production line production time, improving production line production efficiency, facilitating the later disassembly and maintenance of the battery module 10, and reducing after-sales costs.

[0056] Please refer to Figure 1 A heat insulating pad 17 is provided between two adjacent battery cells 111, so that the two adjacent battery cells 111 are separated by the heat insulating pad 17 to avoid mutual influence. At the same time, the heat insulating pad 17 also has a buffering effect.

[0057] Please refer to Figure 2 and Figure 3In some embodiments, a plurality of receiving grooves 1211 for receiving the busbars 122 are provided on one side of the cover body 121 facing the battery cell group 11, and fixing members 1212 are provided in the receiving grooves 1211. Figure 4 The bus bar 122 is provided with a fixing hole 1222 , and the bus bar 122 is fixed to the fixing member 1212 through the fixing hole 1222 to be fixed in the receiving groove 1211 .

[0058] The receiving groove 1211 may be a groove-shaped structure formed by being recessed on the surface of the cover body 121. The shape of the receiving groove 1211 matches the shape of the bus 122, so that the bus 122 can be placed in the receiving groove 1211. The fixing member 1212 may be a cylindrical protrusion protruding from the bottom of the receiving groove 1211. The fixing hole 1222 may be a through hole that passes through the bus 122. The cover body 121 and the fixing member 1212 may be made of thermoplastic material, and the fixing member 1212 and the fixing hole 1222 may be connected by hot riveting, so that the bus 122 is firmly fixed to the receiving groove 1211 of the cover body 121.

[0059] In the technical solution of the embodiment of the present application, through the above-mentioned arrangement, all the busbars 122 are pre-firmly fixed on the cover body 121, so that the busbar cover assembly 12 forms an integral structure, which is convenient for directly installing the busbar cover assembly 12 on the battery cell group 11. When maintenance is required, the busbar cover assembly 12 can also be directly removed for maintenance, which improves production efficiency and facilitates disassembly and maintenance.

[0060] Please refer to Figures 6 to 11 In some embodiments, an elastic member 115 is disposed in the card slot 113 . When the clamping member 1221 is clamped into the card slot 113 , the elastic member 115 clamps the clamping member 1221 and electrically connects the bus 122 to the electrode terminal 112 .

[0061] In the technical solution of the embodiment of the present application, through the above-mentioned setting, when the clamping member 1221 is clamped into the clamping slot 113, the elastic member 115 can clamp the clamping member 1221 to realize the electrical connection between the bus 122 and the electrode terminal 112. When disassembly is required, the clamping member 1221 squeezes the elastic member 115 to deform it, thereby realizing the separation of the clamping member 1221 and the clamping slot 113, which is convenient for installation and disassembly.

[0062] Please refer to Figure 5 , Figures 8 to 11In some embodiments, the electrode terminal 112 includes a first connecting plate body 1120 and a second connecting plate body 1122 that are spaced apart from each other. It can be understood that the first connecting plate body 1120 and the second connecting plate body 1122 are spaced apart from each other along the second direction Y, and a connecting member 1123 is provided between the first connecting plate body 1120 and the second connecting plate body 1122. The interior of the connecting member 1123 is a hollow structure to form a card slot 113, and an accommodating cavity 1121 is provided between the first connecting plate body 1120 and the second connecting plate body 1122 and on the outer side of the connecting member 1123 away from the card slot 113. Among them, the first connecting plate body 1120 can be understood as the bottom plate of the electrode terminal 112 facing the inside of the battery cell 111, and the second connecting plate body 1122 can be understood as the top of the electrode terminal 112 away from the inside of the battery cell 111, then the outer wall 1126 is connected to the outside of the first connecting plate body 1120 and the second connecting plate body 1122, so that the first connecting plate body 1120, the second connecting plate body 1122 and the outer wall 1126 form the electrode terminal 112 with a columnar appearance. The connecting member 1123 is connected to the inside of the first connecting plate body 1120 and the second connecting plate body 1122 near the center of the electrode terminal 112, and the connecting member 1123 can be cylindrical, with its upper end connected to the second connecting plate body 1122 and the lower end connected to the first connecting plate body 1120, and the card slot 113 is formed in the hollow structure of the connecting member 1123. The accommodating cavity 1121 is formed between the connecting member 1123 and the outer wall 1126. In some embodiments, the first connecting plate body 1120 , the second connecting plate body 1122 , the outer wall 1126 , and the connecting member 1123 may be an integral structure.

[0063] Please refer to Fig.10 and Fig.11 In some embodiments, a through hole 1124 penetrating the card slot 113 and the accommodating cavity 1121 is provided on the connecting member 1123, and a partial structure of the elastic member 115 passes through the through hole 1124 to form a clamping portion 1125 in the card slot 113, and a partial structure of the elastic member 115 is placed in the accommodating cavity 1121.

[0064] Among them, Fig.10 and Fig.11 As shown, in some embodiments, the elastic member 115 can be an S-shaped spring, and the elastic member 115 can include two elastic members, one end of the two elastic members 115 are symmetrically fixed to the cavity wall of the accommodating cavity 1121, that is, the inner wall of the outer wall 1126, and the other end of the elastic member 115 is respectively arranged through the through hole 1124 and forms a relative clamping portion 1125 in the slot 113.

[0065] Please refer to Figure 4 and Figure 8The clamping member 1221 is protruding from the surface of the bus 122, and a clamping groove 1223 is provided around the circumference of the clamping member 1221. When the clamping member 1221 is clamped into the clamping groove 113, the clamping portion 1125 of the elastic member 115 is clamped in the clamping groove 1223 and electrically connects the bus 122 to the electrode terminal 112.

[0066] The clamping member 1221 may be a cylindrical structure, and the clamping groove 1223 may be an annular groove surrounding the outer circumference of the clamping member 1221. When the clamping member 1221 is clamped into the clamping groove 113, the clamping member 1221 squeezes the elastic member 115, and after being placed in the clamping groove 113, the clamping portion 1125 is just clamped into the clamping groove 1223, so that the clamping member 1221 is stably fixed in the clamping groove 113.

[0067] In the technical solution of the embodiment of the present application, through the above-mentioned arrangement, during installation, the bus cover assembly 12 is pressed downward, the snap-in component 1221 contacts the clamping portion 1125 of the elastic component 115, and the clamping portion 1125 shrinks to both sides so that the snap-in component 1221 is clamped into the clamping slot 113. After being clamped, the clamping portion 1125 rebounds and is clamped into the clamping slot 1223, thereby realizing a detachable clamping connection between the snap-in component 1221 and the clamping slot 113, which is convenient for installation and disassembly.

[0068] Please refer to Fig. 9 In some embodiments, the battery cell 111 includes an end cap 114 , and the electrode terminal 112 is disposed on the end cap 114 .

[0069] Please refer to Figure 1 , Figure 2 and Figure 3 The busbar cover assembly 12 extends along the first direction X and covers the surface of the battery cell group 11 having the electrode terminal 112. The cover body 121 is provided with limit members 1213 at both ends along the first direction X. When the busbar cover assembly 12 covers the surface of the battery cell group 11, the limit members 1213 of the cover body 121 are limited on both sides of the battery cell group 11 along the first direction X.

[0070] The limiting member 1213 may be a structure perpendicular to the cover body 121 , and is disposed on both sides of the cover body 121 in the length direction.

[0071] In the technical solution of the embodiment of the present application, by setting limit members 1213 at both ends of the cover body 121, during installation, the cover body 121 can be directly limited on both sides of the length direction of the battery cell group 11 by the limit members 1213 of the cover body 121 to determine the installation position, and then the bus 122 and the electrode terminal 112 can be snapped into place by pressing the cover body 121 directly downward, thereby realizing the electrical connection between the battery cells 111 and the fixation of the bus cover assembly 12.

[0072] Please refer to Figure 2 and Figure 3 In some embodiments, the cover body 121 is also integrated with a positive and negative bus bar 122 for connecting to the outside world, so a clearance groove 123 is provided on the limiting member 1213, and the clearance groove 123 allows the positive and negative bus bar 122 to pass through and extend to the outside.

[0073] Please refer to Fig.12 and Fig.13 The battery module also includes a fixing belt 13, which is fixed to the outer side of the battery cell group 11 around the circumference of the battery cell group 11. The fixing belt 13 includes a first belt body 131 and a second belt body 132. One end of the first belt body 131 and one end of the second belt body 132 are connected by a first locking piece 14, and the other end of the first belt body 131 and the other end of the second belt body 132 are connected by a second locking piece 15.

[0074] The fixing belt 13 may be made of metal, and preferably, the fixing belt 13 may be made of stainless steel.

[0075] In the technical solution of the embodiment of the present application, the battery cell group 11 is fixed around the circumference of the battery cell group 11 by using a fixing belt 13 to fix all the battery cells 111 and to be fixed by the first locking piece 14 and the second locking piece 15 at both ends, thereby eliminating the welding connection method, simplifying the production process, and facilitating disassembly.

[0076] Please refer to Figure 1 , Fig.12 and Fig.13 In some embodiments, end plates 16 are provided at both ends of the battery cell group 11 along the first direction X, respectively, and the end plates 16 play a role in protecting the battery cells 111. The fixing belt 13 is fixed around the battery cell group 11 and the end plates 16 at both ends. First limiting grooves 161 are provided on both sides of the end plates 16 to allow the fixing belt 13 to pass through and limit the fixing belt 13 in the up and down directions, so that the fixing belt 13 can be fixed close to the side of the battery cell group 11 and is not easy to move up and down. The contact surface between the first limiting groove 161 and the fixing belt 13 is set as an arc surface to avoid wearing the fixing belt 13 on the contact surface. In some embodiments, a second limiting groove 162 is also provided on the end plate 16 on the side where the first locking member 14 is provided, and the first locking member 14 is accommodated in the second limiting groove 162 to prevent the first locking member 14 from sliding left and right. The upper and lower notches of the second limiting groove 162 are open, which is used to facilitate the insertion of the first locking member 14.

[0077] Please refer to Fig.14 , Fig.15 and Fig.16The first locking member 14 includes a cavity 141 and a first opening 142 and a second opening 143 that pass through the cavity 141. One end of the first belt body 131 and one end of the second belt body 132 overlap relatively and are placed in the cavity 141. The first locking member 14 is formed with a protrusion 144 on one side of the cavity 141 close to the first opening 142 or the second opening 143. The protrusion 144 is an arc-shaped structure and a sliding cavity 147 is formed between the cavity 141. The sliding cavity 147 is provided with a stopper 145 near the first opening 142 or the second opening 143. A rolling member 146 is provided in the sliding cavity 147. When the first belt body 131 and the second belt body 132 are placed in the cavity 141, the rolling member 146 abuts against the surface of the first belt body 131 or the second belt body 132.

[0078] For example: Please refer to Fig.16 The first opening 142 allows the end of the second belt 132 to enter and extend from the second opening 143, and the second opening 143 allows the end of the first belt 131 to enter and extend from the first opening 142. In order to stabilize the overlapped portion of the two, when the first belt 131 and the second belt 132 overlap and the second belt 132 is placed on the side away from the raised portion 144, the end of the second belt 132 can be bent to wrap the side of the first locking member 14 away from the raised portion 144, and at the same time fix the second belt 132. The raised portion 144 is raised in an arc shape in the direction away from the cavity 141. The raised portion 144 is inclined and raised in the direction of the stopper 145, and the rolling member 146 can be a spherical structure.

[0079] In the technical solution of the embodiment of the present application, when the first belt body 131 and the second belt body 132 are relatively overlapped and placed in the cavity 141 of the first locking member 14, the second belt body 132 is bent and wrapped around the side of the first locking member 14 away from the raised portion 144, thereby limiting and fixing the second belt body 132. By pulling the first belt body 131 to make the rolling member 146 contact with the stopper 145, the rolling member 146 is limited. When the first belt body 131 is released, the rolling member 146 can return to the back of the raised portion 144, and the raised portion 144 limits the rolling member 146 and prevents it from rotating. Finally, the first locking member 14 locks and fixes the first belt body 131 and the second belt body 132, and it is also very convenient to disassemble.

[0080] Please refer to Fig.14 , Fig.17 and Fig.18The second locking member 15 includes a locking buckle 151, which is provided with a rotating shaft 153. The other end of the first belt body 131 and the other end of the second belt body 132 are provided with a through hole 133 allowing the rotating shaft 153 to pass through. The second locking member 15 is rotatably connected to the first belt body 131 and the second belt body 132 through the rotating shaft 153. The locking buckle 151 is also provided with a snap ring 152, which has a first state for locking the locking buckle 151 and a second state for opening.

[0081] The locking buckle 151 may be U-shaped, and the other end of the first belt body 131 and the other end of the second belt body 132 extend outwardly to form a connecting end 134, and the through hole 133 is provided at the two connecting ends 134. When installed, the U-shaped locking buckle 151 is buckled to the two connecting ends 134, and the rotating shaft 153 passes through the locking buckle 151 and the connecting ends 134 in sequence. The snap ring 152 is provided on the locking buckle 151, and can be rotated around the locking buckle 151 to open or lock the locking buckle 151. When the snap ring 152 is vertical, the locking buckle 151 can be locked, and when the snap ring 152 is rotated from bottom to top, the locking buckle 151 can be opened.

[0082] In the technical solution of the embodiment of the present application, through the above arrangement, the other ends of the first belt body 131 and the second belt body 132 are locked and fixed by the second locking member 15, and are also convenient for disassembly.

[0083] In some embodiments, the battery module 10 further includes a bottom plate, which is disposed at the bottom of the battery cell group 11 away from the busbar cover assembly 12 to support the bottom of the battery cell group 11. The bottom plate may be made of epoxy resin material.

[0084] On the other hand, please refer to Fig.18 and Fig.19 The present application also provides a battery pack, comprising: a battery module 10 and a bracket 20 according to any of the aforementioned items, the bracket 20 having at least one installation cavity for accommodating the battery module 10, the battery module 10 being installed in the installation cavity, a blocking block 202 being provided at one end of the bracket 20 along the first direction X, a fixing buckle 201 being provided at the other end of the bracket 20 along the first direction X, and the snap ring 152 of the second locking member 15 being snapped to the fixing buckle 201.

[0085] In some embodiments, the bracket 20 may have multiple mounting cavities, such as Fig.17 or Fig.18 The upper and lower mounting cavities shown. Of course, in other embodiments, the bracket 20 may also have three, four or more mounting cavities.

[0086] In the technical solution of the embodiment of the present application, a fixing buckle 201 is provided on the bracket 20 so that the snap ring 152 of the second locking member 15 in the battery module 10 can be snapped onto the fixing buckle 201 in the first locked state, so as to more stably fix the battery module 10. The blocking block 202 at one end of the bracket 20 can block and limit the battery module 10 in the first direction X, that is, the length direction, so that it is better fixed on the bracket 20. The battery pack of the present application can be assembled with the battery module 10 first, and then installed on the bracket 20 and snapped and fixed with the bracket 20. The installation is convenient and quick, which reduces the production cost of the battery pack and simplifies the process.

[0087] On the other hand, the present application also provides an electrical device, including the battery pack.

[0088] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A battery module, characterized in that: include: A battery cell group (11) comprising a plurality of battery cells (111) arranged in sequence along a first direction (X), wherein the battery cells (111) comprise electrode terminals (112), and wherein the electrode terminals (112) are provided with a card slot (113); A busbar cover assembly (12) is covered along a second direction (Y) on a surface of the battery cell group (11) having the electrode terminal (112), the busbar cover assembly (12) comprising a cover body (121) and a plurality of busbars (122), the plurality of busbars (122) being fixed to a side of the cover body (121) facing the battery cell group (11), a clamping member (1221) being provided at a position of the busbar (122) corresponding to the electrode terminal (112), the clamping member (1221) being configured to be detachably clamped into the clamping slot (113) and electrically connecting the busbar (122) to the electrode terminal (112).

2. The battery module according to claim 1, characterized in that: A plurality of accommodating grooves (1211) for accommodating the busbar (122) are provided on one side of the cover plate body (121) facing the battery cell group (11); a fixing piece (1212) is provided in the accommodating groove (1211); the busbar (122) is provided with a fixing hole (1222); the busbar (122) is fixed to the fixing piece (1212) through the fixing hole (1222) so as to be fixed in the accommodating groove (1211).

3. The battery module according to claim 1, characterized in that: An elastic member (115) is provided in the slot (113); when the clamping member (1221) is clamped into the slot (113), the elastic member (115) clamps the clamping member (1221) and electrically connects the busbar (122) to the electrode terminal (112).

4. The battery module according to claim 3, characterized in that: The electrode terminal (112) comprises a first connecting plate body (1120) and a second connecting plate body (1122) which are arranged at intervals, a connecting piece (1123) is provided between the first connecting plate body (1120) and the second connecting plate body (1122), the interior of the connecting piece (1123) is a hollow structure to form the card slot (113), and an accommodating cavity (1121) is provided between the first connecting plate body (1120) and the second connecting plate body (1122) and located on the outer side of the connecting piece (1123) away from the card slot (113). The connecting member (1123) is provided with a through hole (1124) passing through the slot (113) and the accommodating cavity (1121); a part of the structure of the elastic member (115) passes through the through hole (1124) to form a clamping portion (1125) in the slot (113); and a part of the structure of the elastic member (115) is placed in the accommodating cavity (1121); The clamping member (1221) is arranged to protrude from the surface of the busbar (122), and a clamping groove (1223) is provided around the circumference of the clamping member (1221). When the clamping member (1221) is clamped into the clamping groove (113), the clamping portion (1125) of the elastic member (115) is clamped in the clamping groove (1223) to electrically connect the busbar (122) to the electrode terminal (112).

5. The battery module according to claim 1, characterized in that: The busbar cover assembly (12) extends along the first direction (X) and covers the surface of the battery cell group (11) having the electrode terminal (112); the cover body (121) is provided with limit members (1213) at both ends along the first direction (X); when the busbar cover assembly (12) covers the surface of the battery cell group (11), the limit members (1213) of the cover body (121) are limited at both sides of the battery cell group (11) along the first direction (X).

6. The battery module according to any one of claims 1 to 5, characterized in that: Also includes: A fixing belt (13) is fixed to the outer side of the battery cell group (11) around the circumference of the battery cell group (11), and the fixing belt (13) includes a first belt body (131) and a second belt body (132), one end of the first belt body (131) and one end of the second belt body (132) are connected via a first locking piece (14), and the other end of the first belt body (131) and the other end of the second belt body (132) are connected via a second locking piece (15).

7. The battery module according to claim 6, characterized in that: The first locking member (14) comprises a cavity (141) and a first opening (142) and a second opening (143) passing through the cavity (141); one end of the first belt body (131) and one end of the second belt body (132) are relatively overlapped and placed in the cavity (141); the first locking member (14) is formed with a raised portion (144) on one side of the cavity (141) close to the first opening (142) or the second opening (143); the raised portion (144) is arc-shaped. A sliding cavity (147) is formed between the first belt body (131) and the cavity (141); a stopper (145) is provided in the sliding cavity (147) near the first opening (142) or the second opening (143); a rolling member (146) is provided in the sliding cavity (147); when the first belt body (131) and the second belt body (132) are placed in the cavity (141), the rolling member (146) abuts against the surface of the first belt body (131) or the second belt body (132).

8. The battery module according to claim 6, characterized in that: The second locking member (15) comprises a locking buckle (151), the locking buckle (151) is provided with a rotating shaft (153), the other end of the first belt body (131) and the other end of the second belt body (132) are provided with a through hole (133) allowing the rotating shaft (153) to pass through, the second locking member (15) is rotatably connected to the first belt body (131) and the second belt body (132) via the rotating shaft (153), the locking buckle (151) is also provided with a snap ring (152), and the snap ring (152) has a first state for locking the locking buckle (151) and a second state for opening.

9. A battery pack, characterized in that: include: The battery module (10) according to any one of claims 1 to 8; as well as A bracket (20) having at least one installation cavity for accommodating the battery module (10), the battery module (10) being installed in the installation cavity, a blocking block (202) being provided at one end of the bracket (20) along the first direction (X), a fixing buckle (201) being provided at the other end of the bracket (20) along the first direction (X), and the snap ring (152) of the second locking member (15) being snapped to the fixing buckle (201).

10. An electrical device, characterized in that: A battery pack comprising the battery pack of claim 9.

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