Battery module, battery and electric equipment

Abstract

The utility model discloses a battery module, battery and electric equipment, battery module includes: battery cell group and end plate, battery cell group includes a plurality of battery cells that are arranged along the first direction, the end plate is arranged along the opposite both ends of first direction of battery cell group, the end plate includes end plate main part and end plate skeleton that is arranged on the end plate main part, the end plate main body is an insulating part, the end plate framework is a metal part, and the end plate framework is positioned on one side, deviating from the battery monomer group, of the end plate main body. According to the battery module disclosed by the embodiment of the utility model, the structural strength of the end plates can be improved, the capability of resisting deformation caused by battery expansion force of the end plates is enhanced, and the structural failure of the end plates is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of power batteries, in particular to a battery module, a battery and an electrical device. Background Art

[0002] In the related art, a battery module generally includes battery cells arranged in groups, and end plates are installed at both ends of the battery cell group. The end plates can be used to resist deformation of the battery module that may be caused by the battery expansion force of the battery cell group. The end plates are generally set as metal parts, which may cause a short circuit in the battery module. An insulating layer (such as insulating glue or insulating sheet) is also provided between the battery cell group and the end plate. However, when the battery expansion force is large, the structural strength of the end plate is not enough to resist the deformation caused by the battery expansion force, and the end plate is prone to structural failure. Utility Model Content

[0003] In view of the above problems, the utility model provides a battery module, a battery and an electrical device, which can improve the structural strength of the end plate, enhance the ability of the end plate to resist deformation caused by the expansion force of the battery, and avoid structural failure of the end plate.

[0004] In a first aspect, an embodiment of the utility model provides a battery module, comprising: a battery cell group, comprising a plurality of battery cells arranged along a first direction; an end plate, arranged at opposite ends of the battery cell group along the first direction, the end plate comprising an end plate body and an end plate frame arranged on the end plate body, the end plate body is an insulating part, the end plate frame is a metal part, and the end plate frame is located on a side of the end plate body away from the battery cell group.

[0005] In the above technical solution, by making the end plate include an end plate body and an end plate frame provided on the end plate body, the end plate frame and the end plate body are integrated into a whole, which is beneficial to improving the structural strength of the end plate, enhancing the ability of the end plate to resist deformation caused by battery expansion force, and avoiding structural failure of the end plate. In addition, the end plate frame is a metal part, the end plate body is an insulating part, the end plate body has insulation, the end plate frame and the end plate body are integrated into a whole, so that the end plate also integrates the insulation function, and the end plate frame is located on the side of the end plate body away from the battery cell group, so that the end plate body can be used to isolate the metal part from the battery cell group, thereby avoiding problems such as short circuit in the battery module.

[0006] In some embodiments, the end plate skeleton is steel.

[0007] In the above technical solution, by forming the end plate frame into a steel part with high rigidity and strength, the ability of the end plate frame to resist deformation can be improved. When the end plate frame is subjected to the expansion force of the battery cells of the battery cell group, the deformation degree of the end plate can be further reduced or deformation of the end plate can be avoided.

[0008] In some embodiments, the end plate body is a plastic part.

[0009] In the above technical solution, by making the end plate body a plastic part, the plastic part is light in weight, so that the overall weight of the end plate is light, which is beneficial to reducing the overall weight of the battery module and improving the battery module's endurance. In addition, the plastic part is easy to process, making the processing technology of the end plate body simple.

[0010] In some embodiments, the end plate skeleton comprises a plurality of metal rods connected to each other, and at least some of the metal rods are connected to the end plate body.

[0011] In the above technical solution, by making the end plate frame include a plurality of interconnected metal rods, the weight of the end plate frame is reduced while the end plate frame has a certain ability to resist deformation, thereby reducing the overall weight of the battery module and improving the battery module's endurance. By connecting at least part of the metal rods to the end plate body, the end plate frame and the end plate body can be integrated into one module.

[0012] In some embodiments, the metal rod is formed as a hollow structure.

[0013] In the above technical solution, by forming the metal rod into a hollow structure, the weight of the metal rod can be reduced, thereby further reducing the weight of the end plate frame, which is beneficial to further reduce the overall weight of the battery module and further improve the battery life of the battery module.

[0014] In some embodiments, the metal rods are connected by welding.

[0015] In the above technical solution, the metal rods are connected by welding, and the connection relationship and connection method between the metal rods are simple, so it is easy to connect a plurality of metal rods together.

[0016] In some embodiments, the plurality of metal rods include two first metal rods and at least one second metal rod, the two first metal rods are disposed opposite to each other and spaced apart, and the second metal rod is connected between the two first metal rods.

[0017] In the above technical solution, two first metal rods are arranged opposite to each other and at intervals, and the second metal rod is connected between the two first metal rods. The layout between the first metal rod and the second metal rod is reasonable, and the end plate skeleton formed by connecting multiple metal rods has a uniform distribution of the ability to resist deformation in at least one direction.

[0018] In some embodiments, there are a plurality of second metal rods, and the plurality of second metal rods are arranged at intervals along the length direction of the first metal rod.

[0019] In the above technical solution, by providing a plurality of second metal rods and arranging the plurality of metal rods at intervals along the length direction of the first metal rod, the plurality of second metal rods can increase the stiffness and strength of the end plate frame in the length direction of the first metal rod, thereby increasing the deformation resistance of the end plate frame in the length direction of the first metal rod, and is conducive to making the deformation resistance of the end plate frame evenly distributed along the length direction of the first metal rod.

[0020] In some embodiments, the surface of the metal rod facing the end plate body is a first mating surface, the surface of the end plate body opposite to the first mating surface is a second mating surface, and the first mating surface is in contact with the second mating surface or connected via an adhesive layer.

[0021] In the above technical solution, the metal rod is connected to the end plate body by making the first mating surface of the metal rod contact with the second mating surface of the end plate body or connecting through an adhesive layer, and the connection method through the adhesive layer is simple.

[0022] In some embodiments, the first mating surface is a plane.

[0023] In the above technical solution, by making the first mating surface a plane, the contact area between the first mating surface and the second mating surface can be increased, which can improve the stability of the connection between the first mating surface and the second mating surface, thereby improving the connection stability between the end plate frame and the end plate body, which is beneficial to improving the overall structural strength and structural stability of the end plate and the ability to suppress deformation of the battery cell group.

[0024] In some embodiments, the second mating surface is a planar surface.

[0025] In the above technical solution, by making the second mating surface a plane, the contact area between the first mating surface and the second mating surface can be increased, which can improve the stability of the connection between the first mating surface and the second mating surface, thereby improving the connection stability between the end plate frame and the end plate body, which is beneficial to improving the overall structural strength and structural stability of the end plate and the ability to suppress deformation of the battery cell group.

[0026] In some embodiments, a receiving groove is formed on the end plate body, and at least a portion of the end plate frame is received in the receiving groove.

[0027] In the above technical solution, by accommodating at least part of the end plate skeleton in the accommodating groove on the end plate body, the end plate skeleton can be accurately positioned relative to the end plate body with reference to the accommodating groove, so that the end plate skeleton is accurately connected to the end plate body. The accommodating groove on the end plate body can form a limiting effect on the end plate skeleton, so that the end plate skeleton can be more stably arranged on the end plate body, which is beneficial to improving the overall structural strength and structural stability of the end plate, thereby further enhancing the end plate's ability to resist deformation.

[0028] In some embodiments, an adhesive layer is provided between the end plate frame and the inner wall of the receiving groove.

[0029] In the above technical solution, by providing an adhesive layer between the end plate frame and the inner wall of the receiving groove, the end plate frame can be stably connected to the inner wall of the receiving groove, and the connection method through the adhesive layer is simple and easy to operate.

[0030] In some embodiments, the end plate body includes a plate body and a reinforced limiting structure, the end plate frame is located on the side of the plate body away from the battery cell group, the reinforced limiting structure is arranged on the side of the plate body away from the battery cell group, and at least a portion of the accommodating groove is defined between the reinforced limiting structure and the plate body.

[0031] In the above technical scheme, by setting up a reinforced limiting structure, it is possible to strengthen the structural strength of the end plate main body and at the same time enable the end plate main body to form a limiting effect on the end plate frame; by defining at least a portion of the accommodating groove between the reinforced limiting structure and the plate body, the structural design of each part of the end plate main body is reasonable and the layout is compact. When the end plate frame is accommodated in the accommodating groove, the reinforced limiting structure is also beneficial for the end plate frame to be stably arranged on the end plate main body.

[0032] In some embodiments, the reinforced limiting structure includes reinforcing ribs and limiting flanges, the limiting flanges are connected to the edges of the plate body, the reinforcing ribs are distributed on the plate body, the limiting flanges are spaced from the reinforcing ribs to form a portion of the accommodating groove, and the portion of the accommodating groove is defined between the reinforcing ribs.

[0033] In the above technical scheme, the reinforcing limiting structure includes reinforcing ribs and limiting flanges, and the limiting flanges are connected to the edge of the plate body, the reinforcing ribs are distributed on the plate body, the layout of the limiting flanges and the reinforcing ribs is reasonable, and the reinforcing ribs can be used to strengthen the structural strength of the plate body, thereby improving the structural strength of the end plate body; the limiting flanges and the reinforcing ribs are spaced apart to form a portion of the accommodating groove, and the portions of the accommodating groove are defined between the reinforcing ribs, the layout of the limiting flanges, the reinforcing ribs and the accommodating grooves is reasonable, and different portions of the accommodating grooves located at different positions can respectively form limiting effects on different positions of the end plate frame accommodated in the accommodating grooves, which can further make the end plate frame more stably arranged on the end plate body.

[0034] In some embodiments, the end plate body includes an installation and fixing structure, which is located on the outer peripheral side of the end plate frame, and the installation and fixing structure is arranged on the plate body. The installation and fixing structure, the reinforced limiting structure and the plate body jointly define the accommodating groove, and the installation and fixing structure includes at least one of a fixing part, an output pole mounting part and a circuit board mounting part; wherein, the battery module includes an output pole base and a circuit board, the fixing part is used to connect with an external component to install and fix the battery module, the output pole mounting part is used to install the output pole base, and the circuit board mounting part is used to fix the circuit board.

[0035] In the above technical solution, by making the installation and fixing structure include at least one of a fixing part, an output pole mounting part and a circuit mounting part, more functional components are integrated on the end plate body, for example, it can be used to install and fix the output pole base or a circuit board, etc., and it is no longer necessary to set at least one of the fixing part, the output pole mounting part and the circuit mounting part at other positions of the battery module, which can reduce the number of components of the battery module, thereby further simplifying the installation operation of the battery module; and since the end plate body is an insulating part, the installation and fixing structure has insulating properties. When the output pole base or the circuit board is installed on the installation and fixing structure, there is no need to set an insulating structure separately between the output pole base and the installation and fixing structure, or there is no need to set an insulating structure separately between the circuit board and the installation and fixing structure. This is also beneficial to reduce the number of components of the battery module, thereby helping to simplify the installation operation of the battery module.

[0036] In some embodiments, the end plate body includes a plate body and a mounting and fixing structure arranged on the plate body, the end plate frame is located on the side of the plate body away from the battery cell group, the mounting and fixing structure is located on the outer peripheral side of the end plate frame, and the mounting and fixing structure includes at least one of a fixing part, an output pole mounting part and a circuit board mounting part; wherein, the battery module includes an output pole base and a circuit board, the fixing part is used to connect with an external component to install and fix the battery module, the output pole mounting part is used to install the output pole base, and the circuit board mounting part is used to fix the circuit board.

[0037] In the above technical solution, by making the installation and fixing structure include at least one of a fixing part, an output pole mounting part and a circuit mounting part, more functional components are integrated on the end plate body, for example, it can be used to install the output pole or a circuit board, etc., and it is no longer necessary to set at least one of a fixing part, an output pole mounting part and a circuit mounting part at other positions of the battery module, which can reduce the number of components of the battery module, thereby simplifying the installation operation of the battery module; and since the end plate body is an insulating part, the installation and fixing structure has insulating properties. When the output pole base or the circuit board is installed on the installation and fixing structure, there is no need to set an insulating structure separately between the output pole base and the installation and fixing structure, or there is no need to set an insulating structure separately between the circuit board and the installation and fixing structure. This is also beneficial to reduce the number of components of the battery module, thereby simplifying the installation operation of the battery module.

[0038] In some embodiments, the mounting and fixing structure includes the output pole mounting portion and the circuit board mounting portion, the electrode terminal of the battery cell is located on one side of the battery cell along a second direction, the second direction intersects with the first direction, the circuit board includes a circuit board body and a lead-out portion, the circuit board body is located on one side of the battery cell group along the second direction, the lead-out portion is connected to one side of the circuit board body adjacent to one of the end plates, the lead-out portion is fixed to the circuit board mounting portion, and the output pole mounting portion and the circuit board mounting portion are located on the same side of the board body along the second direction.

[0039] In the above technical scheme, by making the installation and fixing structure include an output pole mounting portion and a circuit board mounting portion, the output pole mounting portion and the circuit board mounting portion are integrated on the end plate body, which can further improve the integration of the end plate body, and the installation and fixing structure is an insulating member, when the output pole base is installed on the output pole mounting portion and the circuit board is installed on the circuit board mounting portion, there is no need to set up an additional insulating structure, which is beneficial to reducing the number of components of the battery module, thereby helping to improve the installation production efficiency of the battery module; by making the circuit board include a circuit board body and a lead-out portion, and connecting the lead-out portion to one side of the circuit board body adjacent to one of the end plates, such an arrangement facilitates the fixation of the lead-out portion to the circuit board mounting portion; by making the output pole mounting portion and the circuit board mounting portion be located on the same side of the plate body along the second direction, such an arrangement makes the structure of the end plate body compact, which is beneficial to the miniaturization of the battery module.

[0040] In some embodiments, the mounting and fixing structure includes the fixing portion, the fixing portion has a metal sleeve embedded therein, and the metal sleeve is used to connect with an external component to mount and fix the battery module.

[0041] In the above technical solution, by embedding the metal sleeve in the fixing part, the metal sleeve can improve the rigidity and strength of the fixing part, so that the fixing part can be avoided from being crushed when the battery module is installed and fixed to the external component, which is beneficial to improve the stability of installation and fixation. For example, the battery module can be installed and fixed to the external component by locking the fixing bolt to the fixing part, and the metal sleeve can be connected to the fixing bolt to avoid the fixing part being crushed when the fixing bolt is directly connected to the fixing part, resulting in torque decay, which is beneficial to improve the connection stability between the fixing bolt and the fixing part.

[0042] In some embodiments, the mounting and fixing structure includes the output pole mounting portion, the output pole mounting portion is formed with a mounting groove, and the output pole base is mounted in the mounting groove.

[0043] In the above technical solution, the output pole mounting portion is formed with a mounting groove and the output pole base is mounted in the mounting groove, so that the mounting groove can limit the output pole base, which is beneficial to improving the installation stability of the output pole base.

[0044] In some embodiments, the mounting groove passes through the output pole mounting portion along the first direction, and guide limit grooves are formed on the opposite side walls of the mounting groove along the third direction, and guide limit protrusions are formed on the opposite sides of the output pole base along the third direction, and the guide limit protrusions are accommodated in the guide limit grooves, and the third direction intersects with the first direction.

[0045] In the above technical solution, guide limit grooves are formed on the opposite side walls of the mounting groove along the third direction, guide limit protrusions are formed on the opposite sides of the output pole base along the third direction, and the limit protrusions are accommodated in the guide limit grooves. The guide limit grooves guide the guide limit protrusions, which is convenient for guiding the output pole base to be installed in the mounting groove along the first direction, and the guide limit grooves limit the guide limit protrusions, which can prevent the output pole base from falling out of the output pole mounting part, and is conducive to the stable installation of the output pole base in the output pole mounting part.

[0046] In some embodiments, the battery module includes an output pole base, and the output pole base is integrally formed with the end plate body.

[0047] In the above technical solution, by integrally forming the output pole base and the end plate body, the integration of the end plate can be further improved, so that there is no need to separately install the output pole base on the end plate body, which can further simplify the installation operation of the battery module and help improve the installation production efficiency of the battery module.

[0048] In some embodiments, the battery module also includes a fixing strap, which is mounted on the outer peripheral sides of the battery cell group and the end plate to fix the end plate to the battery cell group. A limiting groove is formed on the end plate body, and a portion of the fixing strap is accommodated in the limiting groove.

[0049] In the above technical solution, by setting a fixing belt, the end plate and the battery cell group can be conveniently fixed, and by forming a limiting groove on the end plate body, part of the fixing belt is accommodated in the limiting groove, so that the limiting groove can limit the fixing belt, which can reduce or avoid the movement of the fixing belt relative to the battery cell group and the end plate, thereby avoiding the looseness between the end plate and the battery cell group caused by the movement of the fixing belt, which is conducive to improving the stability of the fixation between the end plate and the battery cell group. In addition, it can also avoid affecting the normal operation of the battery cell module due to the looseness of the battery cell group.

[0050] In some embodiments, the end plate body includes a plate body, a fixing portion and a limiting flange, the fixing portion is connected to the edge of the plate body and is located on the outer peripheral side of the end plate frame, the fixing portion is used to install and fix the battery module, the limiting flange is connected to the edge of the plate body and extends in a direction away from the battery cell group, and the limiting flange is used to limit the end plate frame; the limiting flange is located on opposite sides of the plate body along a third direction, the fixing portion is located on opposite sides of the plate body along a second direction and is connected to both ends of the plate body along the third direction, the limiting flange and the fixing portion located on the same side of the third direction are spaced apart in the second direction to form the limiting groove between the limiting flange and the fixing portion, and the first direction, the second direction and the third direction intersect with each other.

[0051] In the above technical solution, the limiting flange and the fixing part located on the same side in the third direction are spaced apart in the second direction to form a limiting groove between the limiting flange and the fixing part. The layout between the limiting flange and the fixing part is reasonable, so that the formation method of the limiting groove is simple, and the limiting flange and the fixing part can form a limiting effect on the fixing belt accommodated in the limiting groove in the second direction.

[0052] In some embodiments, the end plate body is an integrally formed piece.

[0053] In the above technical solution, by forming the end plate body into an integrally molded part, the molding process of the end plate body can be simplified, and there is no need to mold different parts of the end plate body separately and then perform connection operations. For example, there is no need to independently mold the output pole mounting part, circuit board mounting part, etc. on the end plate body and then connect them to the end plate body. This is conducive to simplifying the installation operation of the battery module, thereby helping to improve the installation production efficiency of the battery module.

[0054] In some embodiments, the two end plates located at opposite ends of the battery cell group along the first direction are identical.

[0055] In the above technical solution, by making the two end plates located at the opposite ends of the battery cell group along the first direction the same, the two end plates located at the opposite ends of the battery cell group can be used interchangeably. When installing and producing the battery module, there is no need to distinguish the end plates at the two ends before installing them, which is beneficial to improving the installation and production efficiency of the battery module.

[0056] In a second aspect, an embodiment of the utility model provides a battery, including: a battery module of the embodiment of the first aspect mentioned above.

[0057] In the above technical solution, by setting the above battery module, the structural strength of the end plate can be improved, the ability of the end plate to resist deformation caused by the battery expansion force can be enhanced, and structural failure of the end plate can be avoided, thereby reducing or avoiding structural failure of the battery.

[0058] In a third aspect, an embodiment of the utility model provides an electrical device, including: a battery according to the embodiment of the second aspect above.

[0059] In the above technical solution, by setting the above-mentioned battery, the structural strength of the end plate can be improved, the ability of the end plate to resist deformation caused by the battery expansion force can be enhanced, and structural failure of the end plate can be avoided, thereby reducing or avoiding structural failure of the battery, thereby reducing or avoiding malfunctions of electrical equipment.

[0060] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0062] Figure 1 is a schematic diagram of the three-dimensional structure of a battery module according to some embodiments of the utility model;

[0063] Figure 2 yes Figure 1 The enlarged view of point B in FIG.

[0064] Figure 3 yes Figure 1 Explosion diagram of the battery module;

[0065] Figure 4 yes Figure 1 The enlarged view of point C in FIG.

[0066] Figure 5 yes Figure 1 Exploded diagram of the end plate in

[0067] Figure 6 yes Figure 1 Schematic diagram of the end plate in;

[0068] Figure 7 yes Figure 6 The enlarged view of A in FIG.

[0069] Figure 8 yes Figure 1 Schematic diagram of the output pole base.

[0070] Reference numerals:

[0071] 100. Battery module;

[0072] 1. Battery cell group; 11. Battery cell; 111. Electrode terminal;

[0073] 2. End plate; 21. End plate frame; 211. Metal rod; 2111. First metal rod; 2112. Second metal rod; 2113. First mating surface; 22. End plate body; 221. Second mating surface; 222. Accommodating groove; 223. Plate body; 224. Reinforced limiting structure; 2241. Reinforcement rib; 2242. Limiting flange; 225. Mounting and fixing structure; 2251. Fixing part; 226. Metal sleeve; 2252. Output pole mounting part; 227. Mounting groove; 2271. Guide limiting groove; 2253. Circuit board mounting part; 2254. Second connecting hole; 228. Limiting groove;

[0074] 3. Output pole base; 31. Guide limit protrusion;

[0075] 4. Circuit board; 41. Circuit board body; 42. Lead-out portion; 421. Auxiliary connecting portion; 422. First connecting hole; 43. Rivet;

[0076] 5. Fixing strap. DETAILED DESCRIPTION

[0077] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0078] Unless otherwise defined, all technical and scientific terms used in the present invention have the same meanings as those generally understood by technicians in the technical field of the present invention; the terms used in the specification of the present invention in the application are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the terms "including" and "having" and any variations thereof in the specification and claims of the present invention and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of the present invention or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0079] The reference to "embodiment" in the present invention means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments.

[0080] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection", "connection", and "attachment" 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 direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0081] The term "and / or" in the present invention is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in the present invention generally indicates that the associated objects before and after are in an "or" relationship.

[0082] In the embodiments of the present invention, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present invention shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary and should not constitute any limitation on the present invention.

[0083] The term “plurality” used in the present invention refers to two or more (including two).

[0084] In the present invention, the battery may include a box for encapsulating one or more battery cells or multiple battery modules, and the box may prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells. Of course, some batteries may not include the box.

[0085] In the present invention, the battery cell may include a lithium-ion secondary battery, a lithium-ion primary battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery or a magnesium-ion battery, etc., and the embodiments of the present invention do not limit this. The battery cell may be cylindrical, flat, rectangular or other shapes, etc., and the embodiments of the present invention do not limit this. Battery cells are generally divided into three types according to the packaging method: cylindrical batteries, square batteries and soft-pack batteries, and the embodiments of the present invention do not limit this.

[0086] At present, judging from the development of the market situation, the application of batteries is becoming more and more extensive. Batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0087] The inventors of the present invention note that in the related art, a battery module generally includes battery cells arranged in groups, and end plates are installed at both ends of the battery cell group, which can be used to resist deformation of the battery module that may be caused by the battery expansion force of the battery cell group. The end plate is generally set as a metal part, which may cause a short circuit in the battery module, and an insulating layer (such as an insulating glue or an insulating sheet) is also provided between the battery cell group and the end plate. However, when the battery expansion force is large, the structural strength of the end plate is not enough to resist the deformation caused by the battery expansion force, and the end plate is prone to structural failure.

[0088] Based on this, the applicant proposed a battery module, which includes a battery cell group having a plurality of battery cells and end plates arranged at opposite ends of the battery cell group along a first direction, and the end plate includes an end plate body and an end plate frame arranged on a side of the end plate body away from the battery cell group, and the end plate body is an insulating part, and the end plate frame is a metal part.

[0089] In the above-mentioned battery module, by making the end plate include an end plate body and an end plate frame arranged on the end plate body, the end plate frame and the end plate body are integrated into a whole, which is beneficial to improving the structural strength of the end plate, enhancing the ability of the end plate to resist deformation caused by the battery expansion force, and avoiding structural failure of the end plate.

[0090] The end plate frame is a metal part, and the end plate body is an insulating part. The end plate body has insulating properties. The end plate frame and the end plate body are integrated into a whole, so that the end plate also has an insulating function, and the end plate frame is located on the side of the end plate body away from the battery cell group, so that the end plate body can be used to isolate the metal part from the battery cell group, thereby avoiding problems such as short circuit in the battery module.

[0091] The battery module disclosed in the embodiment of the present application can be used in various energy storage systems that use batteries as power sources or use batteries as energy storage elements. The electrical equipment can be, but is not limited to, mobile phones, tablets, laptops, electric toys, electric tools, battery cars, electric cars, ships, spacecraft, etc. Among them, electric toys can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0092] Reference below Figure 1-Figure 8 A battery module 100 according to an embodiment of the present invention is described.

[0093] refer to Figure 1-Figure 4 In the first aspect, the embodiment of the utility model provides a battery module 100, including: a battery cell group 1 and an end plate 2, wherein the battery cell group 1 includes a plurality of battery cells 11 arranged along a first direction. The end plate 2 is disposed at two opposite ends of the battery cell group 1 along the first direction, and the end plate 2 includes an end plate body 21 and an end plate frame 22 disposed on the end plate body 21, wherein the end plate body 21 is an insulating member, the end plate frame 22 is a metal member, and the end plate frame 22 is located on the side of the end plate body 21 away from the battery cell group 1. The first direction can refer to the direction e1 in the figure.

[0094] The end plates 2 located at opposite ends of the battery cell group 1 along the first direction can apply a supporting force along the first direction to the plurality of battery cells 11 , so that the plurality of battery cells 11 can be stably arranged in parallel along the first direction.

[0095] For example, the assembly production process of the battery module 100 includes the following steps: arranging a plurality of battery cells 11 of the battery cell group 1 in parallel along a first direction, and then arranging two end plates 2 at both ends of the battery cell group 1 in the first direction.

[0096] In the above technical solution, by making the end plate 2 include an end plate body 21 and an end plate frame 22 provided on the end plate body 21, the end plate frame 22 and the end plate body 21 are integrated into a whole, which is beneficial to improving the structural strength of the end plate 2, enhancing the ability of the end plate 2 to resist deformation caused by the battery expansion force, and avoiding structural failure of the end plate 2. In addition, the end plate frame 22 is a metal part, the end plate body 21 is an insulating part, and the end plate body 21 has insulation. The end plate frame and the end plate body 21 are integrated into a whole, so that the end plate 2 is also integrated with the insulation function, and the end plate frame 22 is located on the side of the end plate body 21 away from the battery cell group 1, so that the end plate body 21 can be used to isolate the metal part from the battery cell group 1, thereby avoiding problems such as short circuits in the battery module 100.

[0097] refer to Figure 1-Figure 4 In some embodiments, the end plate skeleton 22 is a steel member.

[0098] In the above technical solution, by forming the end plate skeleton 22 into a steel part with high rigidity and strength, the ability of the end plate skeleton 22 to resist deformation can be improved. When the end plate skeleton 22 is subjected to the expansion force of the battery cell 11 of the battery cell group 1, the deformation degree of the end plate 2 can be further reduced or deformation of the end plate 2 can be avoided.

[0099] refer to Figure 1-Figure 4 In some embodiments, the end plate body 21 is a plastic part.

[0100] In the above technical solution, the end plate body 21 is made of a plastic part, which is light in weight, so that the overall weight of the end plate 2 is light, which is beneficial to reducing the overall weight of the battery module 100 and improving the endurance of the battery module 100. In addition, the plastic part is easy to process, so that the processing technology of the end plate body 21 is simple.

[0101] refer to Figure 5-Figure 6 In some embodiments, the end plate skeleton 22 includes a plurality of interconnected metal rods 211 , and at least some of the metal rods 211 are connected to the end plate body 21 .

[0102] For example, some of the metal rods 211 of the end plate skeleton 22 are connected to the end plate body 21 ; for example, all of the metal rods 211 of the end plate skeleton 22 are connected to the end plate body 21 .

[0103] In the above technical solution, by making the end plate skeleton 22 include a plurality of interconnected metal rods 211, the weight of the end plate skeleton 22 is reduced while the end plate skeleton 22 has a certain ability to resist deformation, thereby reducing the overall weight of the battery module 100 and improving the endurance of the battery module 100. By making at least part of the metal rods 211 connected to the end plate body 21, the end plate skeleton 22 and the end plate body 21 can be integrated into one module.

[0104] refer to Figure 5 In some embodiments, the metal rod 211 is formed as a hollow structure.

[0105] In the above technical solution, by forming the metal rod 211 into a hollow structure, the weight of the metal rod 211 can be reduced, thereby further reducing the weight of the end plate frame 22, which is beneficial to further reduce the overall weight of the battery module 100 and to further improve the battery life of the battery module 100.

[0106] refer to Figure 5-Figure 6 In some embodiments, the metal rods 211 are connected by welding.

[0107] For example, the ends of the plurality of metal rods 211 are connected by welding.

[0108] In the above technical solution, the metal rods 211 are connected to each other by welding. The connection relationship and connection method between the metal rods 211 are simple, so it is easy to connect a plurality of metal rods 211 to each other.

[0109] refer to Figure 5-Figure 6 In some embodiments, the plurality of metal rods 211 include two first metal rods 2111 and at least one second metal rod 2112 , the two first metal rods 2111 are disposed opposite to each other and spaced apart, and the second metal rod 2112 is connected between the two first metal rods 2111 .

[0110] The arrangement and connection relationship of the plurality of metal rods 211 may include the following situations:

[0111] For example, the plurality of metal rods 211 include two first metal rods 2111 and one second metal rod 2112, the two first metal rods 2111 are arranged opposite to each other and spaced apart along the second direction, and the second metal rod 2112 is connected to the middle of the two first metal rods 2111 in the third direction, or the second metal rod 2112 is connected to one end of the two first metal rods 2111 in the third direction. The second direction can refer to the direction e2 in the figure, and the third direction can refer to the direction e3 in the figure.

[0112] For example, the multiple metal rods 211 include two first metal rods 2111 and a second metal rod 2112, the two first metal rods 2111 are opposite and spaced apart along the third direction, the second metal rod 2112 is connected to the middle of the two first metal rods 2111 in the second direction, or the second metal rod 2112 is connected to one end of the two first metal rods 2111 in the second direction.

[0113] For example, the plurality of metal rods 211 include two first metal rods 2111 and a plurality of second metal rods 2112 , the two first metal rods 2111 are opposite and spaced apart along the second direction, and the plurality of second metal rods 2112 are arranged in parallel and spaced apart in the third direction and connected between the two first metal rods 2111 .

[0114] For example, the lock metal rod 211 includes two first metal rods 2111 and a plurality of second metal rods 2112. The two first metal rods 2111 are opposite and spaced apart along the third direction, and the plurality of second metal rods 2112 are arranged in parallel and spaced apart in the second direction and connected between the two first metal rods 2111.

[0115] Among them, the second direction can refer to the direction e2 shown in the figure, and the third direction can refer to the direction e3 shown in the figure. The first direction, the second direction and the third direction intersect with each other.

[0116] In the above technical solution, by making the two first metal rods 2111 opposite to each other and spaced apart, the second metal rod 2112 is connected between the two first metal rods 2111, the layout between the first metal rod 2111 and the second metal rod 2112 is reasonable, and the end plate skeleton 22 formed by connecting multiple metal rods 211 has a uniform distribution of the ability to resist deformation in at least one direction.

[0117] refer to Figure 5-Figure 6 In some embodiments, there are multiple second metal rods 2112 , and the multiple second metal rods 2112 are arranged at intervals along the length direction of the first metal rod 2111 .

[0118] In the above technical solution, by providing a plurality of second metal rods 2112 and arranging the plurality of metal rods 211 at intervals along the length direction of the first metal rod 2111, the plurality of second metal rods 2112 can improve the stiffness and strength of the end plate skeleton 22 in the length direction of the first metal rod 2111, thereby improving the deformation resistance of the end plate skeleton 22 in the length direction of the first metal rod 2111, and is conducive to making the deformation resistance of the end plate skeleton 22 evenly distributed along the length direction of the first metal rod 2111.

[0119] refer to Figure 5In some embodiments, the surface of the metal rod 211 facing the end plate body 21 is the first mating surface 2113, and the surface of the end plate body 21 opposite to the first mating surface 2113 is the second mating surface 221. The first mating surface 2113 is in contact with the second mating surface 221 or is connected by an adhesive layer.

[0120] For example, the multiple metal rods 211 of the end plate skeleton 22 have multiple first mating surfaces 2113, and the end plate body 21 has multiple second mating surfaces 221 opposite to the first mating surfaces 2113. The multiple first mating surfaces 2113 correspond one-to-one to the multiple second mating surfaces 221, and the multiple first mating surfaces 2113 and the multiple second mating surfaces 221 are connected by an adhesive layer; or some of the first mating surfaces 2113 and the second mating surfaces 221 are connected by an adhesive layer.

[0121] In the above technical solution, the metal rod 211 is connected to the end plate body 21 by making the first mating surface 2113 of the metal rod 211 contact with the second mating surface 221 of the end plate body 21 or connecting through an adhesive layer, and the connection method through the adhesive layer is simple.

[0122] In some embodiments, the first mating surface 2113 is a plane.

[0123] In the above technical solution, by making the first mating surface 2113 a plane, the contact area between the first mating surface 2113 and the second mating surface 221 can be increased, which can improve the stability of the connection between the first mating surface 2113 and the second mating surface 221, thereby improving the connection stability between the end plate skeleton 22 and the end plate body 21, which is beneficial to improving the overall structural strength and structural stability of the end plate 2 and the ability to suppress deformation of the battery cell group 1.

[0124] In some embodiments, the second mating surface 221 is a plane.

[0125] In the above technical solution, by making the second mating surface 221 a plane, the contact area between the first mating surface 2113 and the second mating surface 221 can be increased, which can improve the stability of the connection between the first mating surface 2113 and the second mating surface 221, thereby improving the connection stability between the end plate frame 22 and the end plate body 21, which is beneficial to improving the overall structural strength and structural stability of the end plate 2 and the ability to suppress deformation of the battery cell group 1.

[0126] refer to Figure 5 In some embodiments, a receiving groove 222 is formed on the end plate body 21 , and at least a portion of the end plate frame 22 is received in the receiving groove 222 .

[0127] At least part of the end plate skeleton 22 is accommodated in the accommodating groove 222, which may include the following situations: for example, the end plate skeleton 22 is completely accommodated in the accommodating groove 222 of the end plate body 21; for example, part of the end plate skeleton 22 is accommodated in the accommodating groove 222 of the end plate body 21.

[0128] Optionally, the end plate skeleton 22 can be interference fit with the receiving groove 222, which is convenient for adding a connecting layer between the end plate skeleton 22 and the receiving groove 222, such as setting an adhesive layer, which is beneficial to further improve the stability of the connection relationship between the end plate skeleton 22 and the end plate body 21, thereby improving the overall structural strength and structural stability of the end plate 2, and further enhancing the ability of the end plate 2 to resist deformation.

[0129] In the above technical solution, by accommodating at least a portion of the end plate skeleton 22 in the accommodating groove 222 on the end plate main body 21, the end plate skeleton 22 can be accurately positioned relative to the end plate main body 21 with reference to the accommodating groove 222, so that the end plate skeleton 22 is accurately connected to the end plate main body 21. The accommodating groove 222 on the end plate main body 21 can form a limiting effect on the end plate skeleton 22, so that the end plate skeleton 22 can be more stably arranged on the end plate main body 21, which is beneficial to improving the overall structural strength and structural stability of the end plate 2, thereby further enhancing the ability of the end plate 2 to resist deformation.

[0130] refer to Figure 5-Figure 6 In some embodiments, an adhesive layer is provided between the end plate frame 22 and the inner wall of the receiving groove 222 .

[0131] For example, the inner wall of the receiving groove 222 includes the bottom wall of the receiving groove 222 and the peripheral wall of the receiving groove 222. Optionally, an adhesive layer is provided between the end plate skeleton 22 and the bottom wall of the receiving groove 222, or an adhesive layer is provided between the end plate skeleton 22 and the peripheral wall of the receiving groove 222, or an adhesive layer is provided between the end plate skeleton 22 and the bottom wall of the receiving groove 222, and an adhesive layer is also provided between the end plate skeleton 22 and the peripheral wall of the receiving groove 222.

[0132] In the above technical solution, an adhesive layer is provided between the end plate frame 22 and the inner wall of the receiving groove 222, so that the end plate frame 22 can be stably connected to the inner wall of the receiving groove 222, and the connection method through the adhesive layer is simple and easy to operate.

[0133] refer to Figure 5-Figure 6 In some embodiments, the end plate body 21 includes a plate body 223 and a reinforcing limiting structure 224, the end plate frame 22 is located on the side of the plate body 223 away from the battery cell group 1, the reinforcing limiting structure 224 is arranged on the side of the plate body 223 away from the battery cell group 1, and at least a portion of the accommodating groove 222 is defined between the reinforcing limiting structure 224 and the plate body 223.

[0134] For example, the entire receiving groove 222 is defined between the reinforcing limiting structure 224 and the plate body 223 ; for example, a portion of the receiving groove 222 is defined between the reinforcing limiting structure 224 and the plate body 223 .

[0135] In the above technical scheme, by setting up a reinforced limiting structure 224, it is possible to strengthen the structural strength of the end plate main body 21 and at the same time enable the end plate main body 21 to form a limiting effect on the end plate frame 22; by defining at least a portion of the accommodating groove 222 between the reinforced limiting structure 224 and the plate body 223, the structural design of each part of the end plate main body 21 is reasonable and the layout is compact. When the end plate frame 22 is accommodated in the accommodating groove 222, the reinforced limiting structure 224 is also beneficial for the end plate frame 22 to be stably arranged on the end plate main body 21.

[0136] refer to Figure 5-Figure 6 In some embodiments, the reinforced limiting structure 224 includes a reinforcing rib 2241 and a limiting flange 2242, the limiting flange 2242 is connected to the edge of the plate body 223, the reinforcing rib 2241 is distributed on the plate body 223, the limiting flange 2242 and the reinforcing rib 2241 are spaced apart to form a portion of the accommodating groove 222, and the portion of the accommodating groove 222 is defined between the reinforcing ribs 2241.

[0137] Optionally, part of the end plate frame 22 can be accommodated in the accommodating groove 222 between the limiting flange 2242 and the reinforcing rib 2241 , and part of the end frame can be accommodated in the accommodating groove 222 between the reinforcing ribs 2241 .

[0138] In the above technical scheme, the reinforcing limiting structure 224 includes a reinforcing rib 2241 and a limiting flange 2242, and the limiting flange 2242 is connected to the edge of the plate body 223, the reinforcing rib 2241 is distributed on the plate body 223, the layout of the limiting flange 2242 and the reinforcing rib 2241 is reasonable, and the reinforcing rib 2241 can be used to strengthen the structural strength of the plate body 223, thereby improving the structural strength of the end plate body 21; by spacing the limiting flange 2242 and the reinforcing rib 2241 to form a part of the accommodating groove 222, the part of the accommodating groove 222 is defined between the reinforcing ribs 2241, the layout of the limiting flange 2242, the reinforcing rib 2241 and the accommodating groove 222 is reasonable, and different parts of the accommodating groove 222 located at different positions can respectively form a limiting and supporting effect on different positions of the end plate skeleton 22 accommodated in the accommodating groove 222, which can further make the end plate skeleton 22 more stably arranged on the end plate body 21.

[0139] refer to Figure 5-Figure 8In some embodiments, the end plate body 21 includes a mounting and fixing structure 225, which is located on the outer peripheral side of the end plate frame 22, and is provided on the plate body 223. The mounting and fixing structure 225, the reinforcing limiting structure 224 and the plate body 223 jointly define a receiving groove 222, and the mounting and fixing structure 225 includes at least one of a fixing portion 2251, an output pole mounting portion 2252 and a circuit board mounting portion 2253. Among them, the battery module 100 includes an output pole base 3 and a circuit board 4, the fixing portion 2251 is used to connect with an external component to install and fix the battery module 100, the output pole mounting portion 2252 is used to install the output pole base 3, and the circuit board mounting portion 2253 is used to fix the circuit board 4. Optionally, the circuit board 4 can be set as a flexible circuit board.

[0140] For example, a portion of the receiving groove 222 is defined between the reinforcing limiting structure 224 and the plate body 223 , and another portion of the receiving groove 222 is defined between the mounting and fixing structure 225 , the reinforcing limiting structure 224 , and the plate body 223 .

[0141] The installation and fixing structure 225 includes at least one of the fixing portion 2251, the output pole mounting portion 2252 and the circuit board mounting portion 2253, which may include the following situations:

[0142] For example, the mounting and fixing structure 225 includes one of the fixing part 2251, the output pole mounting part 2252 and the circuit board mounting part 2253; for example, the mounting and fixing structure 225 includes two of the fixing part 2251, the output pole mounting part 2252 and the circuit board mounting part 2253; for example, the mounting and fixing structure 225 includes three of the fixing part 2251, the output pole mounting part 2252 and the circuit board mounting part 2253.

[0143] In the above technical solution, the end plate body 21 includes an installation and fixing structure 225, and the installation and fixing structure 225 is located on the outer peripheral side of the end plate frame 22 and is arranged on the plate body 223. The installation and fixing structure 225, the reinforced limiting structure 224 and the plate body 223 jointly define a receiving groove 222, so that the end plate frame 22 can be easily arranged on the end plate body 21 through the receiving groove 222.

[0144] By making the installation and fixing structure 225 include at least one of the fixing portion 2251, the output pole mounting portion 2252 and the circuit mounting portion, more functions are integrated on the end plate body 21, for example, it can be used to install and fix the output pole base 3 or the circuit board, etc., and it is no longer necessary to set the fixing portion 2251, the output pole mounting portion 2252 and at least one of the circuit mounting portion at other positions of the battery module 100, which can reduce the number of components of the battery module 100, thereby further simplifying the installation operation of the battery module 100; and because the end plate body 21 is an insulating member, the installation and fixing structure 225 has insulation. When the output pole base 3 or the circuit board 4 is installed on the mounting and fixing structure 225, there is no need to set an insulating structure separately between the output pole base 3 and the mounting and fixing structure 225, or there is no need to set an insulating structure separately between the circuit board 4 and the mounting and fixing structure 225; if the mounting and fixing structure 225 is set on the end plate frame 22, it is necessary to set an insulating structure between the end plate frame 22 and the output pole base 3, or it is necessary to set an insulating structure between the end plate frame 22 and the circuit board 4. Therefore, this is also beneficial to reduce the number of components of the battery module 100, thereby helping to simplify the installation operation of the battery module 100.

[0145] refer to Figure 5-Figure 7 In some embodiments, the end plate body 21 includes a plate body 223 and a mounting and fixing structure 225 provided on the plate body 223. The end plate frame 22 is located on the side of the plate body 223 away from the battery cell group 1. The mounting and fixing structure 225 is located on the outer peripheral side of the end plate frame 22. The mounting and fixing structure 225 includes at least one of a fixing portion 2251, an output pole mounting portion 2252, and a circuit board mounting portion 2253. Among them, the battery module 100 includes an output pole base 3 and a circuit board 4. The fixing portion 2251 is used to connect with an external component to install and fix the battery module 100. The output pole mounting portion 2252 is used to install the output pole base 3. The circuit board mounting portion 2253 is used to fix the circuit board 4.

[0146] The installation and fixing structure 225 includes at least one of the fixing portion 2251, the output pole mounting portion 2252 and the circuit board mounting portion 2253, which may include the following situations:

[0147] For example, the mounting and fixing structure 225 includes one of the fixing part 2251, the output pole mounting part 2252 and the circuit board mounting part 2253; for example, the mounting and fixing structure 225 includes two of the fixing part 2251, the output pole mounting part 2252 and the circuit board mounting part 2253; for example, the mounting and fixing structure 225 includes three of the fixing part 2251, the output pole mounting part 2252 and the circuit board mounting part 2253.

[0148] In the above technical solution, by making the installation fixing structure 225 include at least one of the fixing portion 2251, the output pole mounting portion 2252 and the circuit mounting portion, more functional components are integrated on the end plate body 21, for example, it can be used to install the output pole or the circuit board, etc., and it is no longer necessary to set the fixing portion 2251, the output pole mounting portion 2252 and at least one of the circuit mounting portion at other positions of the battery module 100; and because the end plate body 21 is an insulating member, the installation fixing structure 225 has insulation, and when the output pole base 3 or the circuit board 4 is installed on the installation When the fixing structure 225 is installed, there is no need to separately set an insulating structure between the output pole base 3 and the installation fixing structure 225, or there is no need to separately set an insulating structure between the circuit board 4 and the installation fixing structure 225. If the installation fixing structure 225 is set on the end plate frame 22, it is necessary to separately set an insulating structure between the end plate frame 22 and the output pole base 3, or it is necessary to separately set an insulating structure between the end plate frame 22 and the circuit board 4. Therefore, this is also beneficial to reduce the number of components of the battery module 100, thereby helping to simplify the installation operation of the battery module 100.

[0149] refer to Figure 5-Figure 8 In some embodiments, the mounting and fixing structure 225 includes an output pole mounting portion 2252 and a circuit board mounting portion 2253, the electrode terminal 111 of the battery cell 11 is located on one side of the battery cell 11 along the second direction, the second direction intersects with the first direction, the circuit board 4 includes a circuit board body 41 and a lead-out portion 42, the circuit board body 41 is located on one side of the battery cell group 1 along the second direction, the lead-out portion 42 is connected to one side of the circuit board body 41 adjacent to one of the end plates 2, the lead-out portion 42 is fixed to the circuit board mounting portion 2253, the output pole mounting portion 2252 and the circuit board mounting portion 2253 are located on the same side of the board body 223 along the second direction.

[0150] For example, the circuit board 4 is a flexible circuit board, which is electrically connected to the battery cell 11 through the circuit board body 41 , and is electrically connected to an external device through the lead-out portion 42 . The external device can be used to monitor the status of the battery module 100 .

[0151] Optionally, an auxiliary connection part 421 is also provided on the lead-out part 42. The auxiliary connection part 421 can be formed as a plastic part. The auxiliary connection part 421 is connected to the lead-out part 42 through an adhesive layer. A first connection hole 422 is formed on the auxiliary connection part 421. A second connection hole 2254 is formed on the circuit board mounting part 2253. The lead-out part 42 can be connected and mounted on the circuit board mounting part 2253 by inserting a fastener (such as a rivet 43) through the first connection hole 422 and the second connection hole 2254.

[0152] Optionally, the output pole mounting portion 2252 and the circuit board mounting portion 2253 are arranged at intervals in the third direction; optionally, the mounting and fixing structure 225 may include two output pole mounting portions 2252, and the two output pole mounting portions 2252 are located on both sides of the circuit board mounting portion 2253 in the third direction.

[0153] In the above technical solution, by making the mounting and fixing structure 225 include the output pole mounting portion 2252 and the circuit board mounting portion 2253, the output pole mounting portion 2252 and the circuit board mounting portion 2253 are integrated on the end plate body 21, which can further improve the integration of the end plate body 21, and the mounting and fixing structure 225 is an insulating member, when the output pole base 3 is installed on the output pole mounting portion 2252 and the circuit board 4 is installed on the circuit board mounting portion 2253, it is no longer necessary to set up an additional insulating structure, which is conducive to reducing the battery module 100 The number of components is reduced, which is beneficial to improving the installation production efficiency of the battery module 100; by making the circuit board 4 include a circuit board body 41 and a lead-out portion 42, and connecting the lead-out portion 42 to a side of the circuit board body 41 adjacent to one of the end plates 2, such an arrangement facilitates the fixation of the lead-out portion 42 to the circuit board mounting portion 2253; by making the output pole mounting portion 2252 and the circuit board mounting portion 2253 located on the same side of the plate body 223 along the second direction, such an arrangement makes the structure of the end plate body 21 compact, which is beneficial to the miniaturization of the battery module 100.

[0154] refer to Figure 7 In some embodiments, the mounting and fixing structure 225 includes a fixing portion 2251 , in which a metal sleeve 226 is embedded. The metal sleeve 226 is used to connect with external components to mount and fix the battery module 100 .

[0155] Optionally, the mounting and fixing structure 225 includes two fixing parts 2251, the two fixing parts 2251 are located at opposite sides of the plate body 223 along the second direction, and each fixing part 2251 includes two fixing holes, and the two fixing holes are arranged at two ends of the mounting and fixing structure 225 along the third direction. For example, the battery module 100 can be connected to the external component by inserting a fastener through the external component (such as a box body) and the metal sleeve 226 in the fixing part 2251 to install and fix the battery module 100.

[0156] In the above technical solution, by embedding the metal sleeve 226 in the fixing part 2251, the metal sleeve 226 can improve the rigidity and strength of the fixing part 2251, so that when the battery module 100 is installed and fixed to the external component, the fixing part 2251 can be avoided from being crushed, which is beneficial to improve the stability of installation and fixation. For example, the battery module 100 can be installed and fixed to the external component by locking the fixing bolt to the fixing part 2251, and the metal sleeve 226 can be connected to the fixing bolt to avoid the fixing bolt and the fixing part 2251 directly connecting. The fixing part 2251 will be crushed to cause torque decay, which is beneficial to improve the connection stability between the fixing bolt and the fixing part 2251.

[0157] refer to Figure 5-Figure 7 In some embodiments, the mounting and fixing structure 225 includes an output pole mounting portion 2252 , the output pole mounting portion 2252 is formed with a mounting groove 227 , and the output pole base 3 is mounted in the mounting groove 227 .

[0158] In the above technical solution, the output pole mounting portion 2252 is formed with a mounting groove 227 and the output pole base 3 is mounted in the mounting groove 227 , so that the mounting groove 227 can limit the output pole base 3 , which is beneficial to improve the installation stability of the output pole base 3 .

[0159] refer to Figure 5-Figure 7 In some embodiments, the mounting groove 227 penetrates the output pole mounting portion 2252 along the first direction, and guide limit grooves 2271 are formed on the opposite side walls of the mounting groove 227 along the third direction, and guide limit protrusions 31 are formed on the opposite sides of the output pole base 3 along the third direction, and the guide limit protrusions 31 are accommodated in the guide limit grooves 2271, and the third direction intersects with the first direction.

[0160] In the process of installing the output pole base 3 in the mounting groove 227, the output pole base 3 is positioned by the matching relationship between the guide limit protrusion 31 of the output pole base 3 and the guide limit groove 2271 of the mounting groove 227; then the guide limit protrusion 31 is accommodated in the guide limit groove 2271 by sliding along the first direction; thus, the output pole base 3 is installed in the mounting groove 227.

[0161] In the above technical scheme, a guide limit groove 2271 is formed on the opposite side walls of the mounting groove 227 along the third direction, and a guide limit protrusion 31 is formed on the opposite sides of the output pole base 3 along the third direction, and the limit protrusion is accommodated in the guide limit groove 2271. The guide limit groove 2271 forms a guiding effect on the guide limit protrusion 31, which is convenient for guiding the output pole base 3 to be installed in the mounting groove 227 along the first direction, and the guide limit groove 2271 forms a limiting effect on the guide limit protrusion 31, which can prevent the output pole base 3 from falling out of the output pole mounting portion 2252, which is beneficial for the output pole base 3 to be stably installed in the output pole mounting portion 2252.

[0162] In some embodiments, the battery module 100 includes an output pole base 3 , and the output pole base 3 is integrally formed with the end plate body 21 .

[0163] In the above technical solution, by integrally forming the output pole base 3 and the end plate body 21, the integration of the end plate 2 can be further improved, so that there is no need to additionally install the output pole base 3 on the end plate body 21, which can further simplify the installation operation of the battery module 100 and is beneficial to improving the installation production efficiency of the battery module 100.

[0164] refer to Figure 1-Figure 4 In some embodiments, the battery module 100 further includes a fixing belt 5, which is sleeved on the outer peripheral sides of the battery cell group 1 and the end plate 2 to fix the end plate 2 to the battery cell group 1. A limiting groove 228 is formed on the end plate body 21, and a portion of the fixing belt 5 is accommodated in the limiting groove 228.

[0165] Optionally, the fixing belt 5 can be made of steel belt, plastic belt, insulating rubber belt, etc. When the fixing belt 5 is made of steel belt, insulating bushings are provided at the positions of the fixing belt 5 and the corresponding battery cells 11 to achieve insulation. For example, the fixing belt 5 is provided on the outer peripheral sides of the battery cell group 1 and the end plate 2 to bundle and fix the end plate 2 and the battery cell group 1.

[0166] For example, the installation and production process of the battery module 100 includes the following steps: first, a plurality of battery cells 11 are arranged in parallel along a first direction to form a battery cell group 1; then, two end plates 2 are respectively arranged at opposite ends of the battery cell group 1 along the first direction; then, a fixing belt 5 is sleeved on the outer peripheral sides of the battery cell group 1 and the end plates 2, and a portion of the fixing belt 5 is accommodated in the limiting groove 228. Thus, the fixing sleeve completes the fixing of the end plates 2 and the battery cell group 1.

[0167] In the above technical solution, by providing the fixing belt 5, the end plate 2 and the battery cell group 1 can be conveniently fixed, and by forming a limiting groove 228 on the end plate body 21, part of the fixing belt 5 is accommodated in the limiting groove 228, so that the limiting groove 228 can limit the fixing belt 5, which can reduce or avoid the movement of the fixing belt 5 relative to the battery cell group 1 and the end plate 2, thereby avoiding the looseness between the end plate 2 and the battery cell group 1 caused by the movement of the fixing belt 5, which is conducive to improving the stability of the fixation between the end plate 2 and the battery cell group 1. In addition, it can also avoid the normal operation of the battery cell 11 module being affected by the looseness of the battery cell group 1.

[0168] refer to Figure 5-Figure 6 In some embodiments, the end plate body 21 includes a plate body 223, a fixing portion 2251 and a limiting flange 2242, the fixing portion 2251 is connected to the edge of the plate body 223 and is located on the outer peripheral side of the end plate frame 22, the fixing portion 2251 is used to install and fix the battery module 100, the limiting flange 2242 is connected to the edge of the plate body 223 and extends in a direction away from the battery cell group 1, and the limiting flange 2242 is used to limit the end plate frame 22. The limiting flange 2242 is located on two opposite sides of the plate body 223 along the third direction, the fixing portion 2251 is located on two opposite sides of the plate body 223 along the second direction and is connected to both ends of the plate body 223 along the third direction, the limiting flange 2242 and the fixing portion 2251 located on the same side in the third direction are spaced apart in the second direction to form a limiting groove 228 between the limiting flange 2242 and the fixing portion 2251, and the first direction, the second direction and the third direction intersect each other.

[0169] In the above technical scheme, by setting the limiting flange 2242, the limiting flange 2242 forms a limiting effect on the end plate frame 22, so that the end plate frame 22 can be stably arranged on the end plate body 21; by making the limiting flange 2242 and the fixing part 2251 located on the same side in the third direction spaced apart in the second direction, so as to form a limiting groove 228 between the limiting flange 2242 and the fixing part 2251, the layout between the limiting flange 2242 and the fixing part 2251 is reasonable, so that the formation method of the limiting groove 228 is simple, and the limiting flange 2242 and the fixing part 2251 can form a limiting effect on the fixing belt 5 accommodated in the limiting groove 228 in the second direction.

[0170] refer to Figure 5-Figure 6 In some embodiments, the end plate body 21 is an integrally formed part.

[0171] In the above technical solution, by forming the end plate body 21 as an integrally molded part, the molding process of the end plate body 21 can be simplified, and there is no need to separately mold different parts of the end plate body 21 and then perform connection operations. For example, there is no need to independently mold the output pole mounting portion 2252, the circuit board mounting portion 2253, etc. on the end plate body 21 and then connect them to the end plate body 21. This is beneficial to simplify the installation operation of the battery module 100, thereby helping to improve the installation production efficiency of the battery module 100.

[0172] refer to Figure 1-Figure 2 In some embodiments, the two end plates 2 located at opposite ends of the battery cell group 1 along the first direction are identical.

[0173] In the above technical solution, by making the two end plates 2 located at the opposite ends of the battery cell group 1 along the first direction the same, the two end plates 2 located at the opposite ends of the battery cell group 1 can be used interchangeably, and when installing and producing the battery module 100, there is no need to distinguish the end plates 2 at the two ends before installing them.

[0174] In a second aspect, an embodiment of the utility model provides a battery, including: the battery module 100 of the embodiment of the first aspect mentioned above.

[0175] In the above technical solution, by providing the above-mentioned battery module 100, the installation and production process of the battery module 100 is simplified, and the installation and production efficiency is high, so that the installation and production efficiency of the battery is also high.

[0176] In a third aspect, an embodiment of the utility model provides an electrical device, including: a battery according to the embodiment of the second aspect above.

[0177] In the above technical solution, by setting the above battery, the battery includes the above battery module 100. Since the installation and production process of the battery module 100 is simplified, the installation and production efficiency of the battery is higher, thereby making the production efficiency of the electrical equipment higher.

[0178] Next, we will refer to Figure 1-Figure 8 The battery module 100 according to some embodiments of the present invention is described.

[0179] Reference Figure 1-Figure 8 In this embodiment, the battery module 100 includes a battery cell group 1 and two end plates 2. The battery cell group 1 includes a plurality of battery cells 11 arranged in parallel along a first direction. The electrode terminals 111 of the plurality of battery cells 11 are all located on one side of the battery cell group 1 along a second direction. The two end plates 2 are arranged at opposite ends of the battery cell group 1 along the first direction.

[0180] The end plate 2 includes an end plate body 21 and an end plate frame 22. The end plate frame 22 is arranged on the end plate body 21 and is located on the side of the end plate body 21 away from the battery cell group 1. The end plate body 21 is a plastic part, and the end plate frame 22 is a steel part. Specifically, the end plate frame 22 includes a plurality of interconnected metal rods 211, and the plurality of metal rods 211 include two first metal rods 2111 and three second metal rods 2112. The two first metal rods 2111 are opposite and spaced in the third direction, and the three second metal rods 2112 are connected between the two first metal rods 2111. The three second metal rods 2112 are spaced along the length direction of the first metal rod 2111, and the length direction of the first metal rod 2111 is consistent with the second direction.

[0181] The end plate body 21 includes a plate body 223 and a reinforced limiting structure 224. The reinforced limiting structure 224 is arranged on the side of the plate body 223 away from the battery cell group 1. The reinforced limiting structure 224 includes a reinforcing rib 2241 and two limiting flanges 2242. The reinforcing rib 2241 is distributed on the plate body 223. The two limiting flanges 2242 are connected to two edges of the plate body 223 on opposite sides along the third direction, and the two limiting flanges 2242 extend toward the direction of the plate body 223 away from the battery cell group 1.

[0182] The end plate body 21 also includes a mounting and fixing structure 225, which is disposed on the plate body 223, and the mounting and fixing structure 225 is disposed on two opposite sides of the plate body 223 along the second direction. The mounting and fixing structure 225 includes two fixing parts 2251, an output pole mounting part 2252, and a circuit board mounting part 2253. The two fixing parts 2251 are respectively disposed on two opposite sides of the plate body 223 along the second direction, and the two fixing parts 2251 respectively include two fixing holes, and the two fixing holes are located at both ends of the plate body 223 along the third direction. A metal sleeve 226 is embedded in each fixing hole of the fixing part 2251, and the metal sleeve 226 can be used to connect with external components to install and fix the battery module 100.

[0183] The limiting flange 2242 and the fixing portion 2251 located on the same side in the third direction are spaced apart in the second direction, and a limiting groove 228 is formed between the limiting flange 2242 and the fixing portion 2251 .

[0184] The output pole mounting portion 2252 and the circuit board mounting portion 2253 are located on one side of the plate body 223 close to the electrode terminal 111 of the battery cell 11 in the second direction. In an optional manner, the output pole mounting portion 2252 may include two mounting grooves 227, and the two mounting grooves 227 are located on both sides of the circuit board mounting portion 2253 in the third direction. The mounting groove 227 penetrates along the first direction, and the two opposite side walls of the mounting groove 227 along the third direction are formed with guide limit grooves 2271. The circuit board mounting portion 2253 is formed with two second connection holes 2254 arranged in parallel along the third direction.

[0185] The plate body 223, the reinforcing limiting structure 224 and the mounting and fixing structure 225 of the end plate body 21 define a receiving groove 222, wherein the reinforcing ribs 2241 define a portion of the receiving groove 222, the reinforcing ribs 2241 and the limiting flange 2242 define a portion of the receiving groove 222, and the reinforcing ribs 2241 and the mounting and fixing structure 225 define a portion of the receiving groove 222. Part of the end plate frame 22 is accommodated in the receiving groove 222, and the surface of the metal rod 211 of the end plate frame 22 facing the end plate body 21 is the first mating surface 2113, and the surface of the receiving groove 222 of the end plate body 21 opposite to the first mating surface 2113 is the second mating surface 221, both the first mating surface 2113 and the second mating surface 221 are planes, the first mating surface 2113 contacts the second mating surface 221, and some of the first mating surfaces 2113 and the second mating surfaces 221 are connected by an adhesive layer.

[0186] The battery module 100 further includes an output pole base 3 and a circuit board 4. The output pole base 3 is mounted on the output pole mounting portion 2252, and the circuit board 4 is fixed to the circuit board mounting portion 2253. The output pole base 3 is formed with guide limit protrusions 31 on opposite sides along the third direction. The output pole base 3 can be mounted on the mounting groove 227 along the first direction, and the guide limit protrusion 31 is accommodated in the guide limit groove 2271 of the mounting groove 227. The circuit board 4 includes a circuit board body 41 and a lead-out portion 42. The circuit board body 41 is located on one side of the battery cell group 1 along the second direction, and the circuit board body 41 is electrically connected to the battery cell group 1. The lead-out portion 42 is connected to one side of the circuit board body 41 adjacent to one of the end plates 2. The lead-out portion 42 is also connected to the auxiliary connection portion 421. The auxiliary connection portion 421 is formed as a plate-like structure and a plastic insulating member. The auxiliary connection portion 421 is formed with two first connection holes 422 arranged in parallel along the third direction. The two first connection holes 422 are arranged in one-to-one correspondence with the two second connection holes 2254 on the circuit board mounting portion 2253 . By inserting the rivets 43 through the first connection holes 422 and the second connection holes 2254 , the lead-out portion 42 of the circuit board 4 can be fixed on the circuit board mounting portion 2253 .

[0187] The battery module 100 also includes a fixing belt 5, which is made of a steel belt. The fixing belt 5 is sleeved on the outer peripheral sides of the battery cell group 1 and the end plate 2 to bundle and fix the end plate 2 and the battery cell group 1. A limiting groove 228 is formed on the end plate body 21, and part of the fixing belt 5 is accommodated in the limiting groove 228. An insulating bushing is also provided between the fixing belt 5 and the battery cell group 1.

[0188] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0189] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery module, characterized in that: include: A battery cell group, comprising a plurality of battery cells arranged along a first direction; The end plate is arranged at the opposite ends of the battery cell group along the first direction. The end plate includes an end plate body and an end plate frame arranged on the end plate body. The end plate body is an insulating part, and the end plate frame is a metal part. The end plate frame is located on the side of the end plate body away from the battery cell group.

2. The battery module according to claim 1, characterized in that: The end plate frame is a steel part; and / or the end plate body is a plastic part.

3. The battery module according to claim 1, characterized in that: The end plate frame includes a plurality of metal rods connected to each other, and at least some of the metal rods are connected to the end plate body.

4. The battery module according to claim 3, characterized in that: The metal rods are formed into a hollow structure; and / or the metal rods are welded to each other.

5. The battery module according to claim 3, characterized in that: The plurality of metal rods include two first metal rods and at least one second metal rod, the two first metal rods are arranged opposite to each other and spaced apart, and the second metal rod is connected between the two first metal rods.

6. The battery module according to claim 5, characterized in that: There are a plurality of second metal rods, and the plurality of second metal rods are arranged at intervals along the length direction of the first metal rod.

7. The battery module according to claim 3, characterized in that: The surface of the metal rod facing the end plate body is a first mating surface, the surface of the end plate body opposite to the first mating surface is a second mating surface, and the first mating surface is in contact with the second mating surface or connected via an adhesive layer.

8. The battery module according to claim 7, characterized in that: The first mating surface and / or the second mating surface is a plane.

9. The battery module according to claim 1, characterized in that: A receiving groove is formed on the end plate body, and at least a part of the end plate frame is received in the receiving groove.

10. The battery module according to claim 9, characterized in that: An adhesive layer is provided between the end plate frame and the inner wall of the containing groove.

11. The battery module according to claim 9, characterized in that: The end plate body includes a plate body and a reinforcing limiting structure. The end plate frame is located on the side of the plate body away from the battery cell group. The reinforcing limiting structure is arranged on the side of the plate body away from the battery cell group. The reinforcing limiting structure and the plate body define at least a portion of the accommodating groove.

12. The battery module according to claim 11, characterized in that: The reinforced limiting structure includes reinforcing ribs and limiting flanges, wherein the limiting flanges are connected to the edges of the plate body, the reinforcing ribs are distributed on the plate body, the limiting flanges are spaced from the reinforcing ribs to form a portion of the accommodating groove, and the portion of the accommodating groove is defined between the reinforcing ribs.

13. The battery module according to claim 11, characterized in that: The end plate body includes a mounting and fixing structure, the mounting and fixing structure is located on the outer peripheral side of the end plate frame, the mounting and fixing structure is arranged on the plate body, the mounting and fixing structure, the reinforcing limiting structure and the plate body jointly define the accommodating groove, and the mounting and fixing structure includes at least one of a fixing portion, an output pole mounting portion and a circuit board mounting portion; Wherein, the battery module includes an output pole base and a circuit board, the fixing portion is used to connect with an external component to install and fix the battery module, the output pole mounting portion is used to install the output pole base, and the circuit board mounting portion is used to fix the circuit board.

14. The battery module according to claim 1, characterized in that: The end plate body comprises a plate body and a mounting and fixing structure provided on the plate body, the end plate frame is located on a side of the plate body away from the battery cell group, the mounting and fixing structure is located on the outer peripheral side of the end plate frame, and the mounting and fixing structure comprises at least one of a fixing portion, an output pole mounting portion, and a circuit board mounting portion; Wherein, the battery module includes an output pole base and a circuit board, the fixing portion is used to connect with an external component to install and fix the battery module, the output pole mounting portion is used to install the output pole base, and the circuit board mounting portion is used to fix the circuit board.

15. The battery module according to claim 14, characterized in that: The mounting and fixing structure includes the output pole mounting portion and the circuit board mounting portion, the electrode terminal of the battery cell is located on one side of the battery cell along the second direction, the second direction intersects with the first direction, the circuit board includes a circuit board body and a lead-out portion, the circuit board body is located on one side of the battery cell group along the second direction, the lead-out portion is connected to one side of the circuit board body adjacent to one of the end plates, the lead-out portion is fixed to the circuit board mounting portion, and the output pole mounting portion and the circuit board mounting portion are located on the same side of the board body along the second direction.

16. The battery module according to claim 14, characterized in that: The installation and fixing structure includes the fixing part, and the fixing part is embedded with a metal sleeve, and the metal sleeve is used to connect with an external component to install and fix the battery module.

17. The battery module according to claim 14, characterized in that: The mounting and fixing structure includes the output pole mounting portion, the output pole mounting portion is formed with a mounting groove, and the output pole base is mounted in the mounting groove.

18. The battery module according to claim 17, characterized in that: The mounting groove passes through the output pole mounting portion along the first direction, and guide limit grooves are formed on the opposite side walls of the mounting groove along the third direction. Guide limit protrusions are formed on the opposite sides of the output pole base along the third direction, and the guide limit protrusions are accommodated in the guide limit grooves. The third direction intersects with the first direction.

19. The battery module according to claim 1, characterized in that: The battery module comprises an output pole base, and the output pole base is integrally formed with the end plate body.

20. The battery module according to claim 1, characterized in that: It also includes a fixing belt, which is sleeved on the outer peripheral sides of the battery cell group and the end plate to fix the end plate to the battery cell group. A limiting groove is formed on the end plate body, and part of the fixing belt is accommodated in the limiting groove.

21. The battery module according to claim 20, characterized in that: The end plate body comprises a plate body, a fixing portion and a limiting flange, wherein the fixing portion is connected to the edge of the plate body and is located at the outer peripheral side of the end plate frame, the fixing portion is used to install and fix the battery module, the limiting flange is connected to the edge of the plate body and extends in a direction away from the battery cell group, and the limiting flange is used to limit the end plate frame; The limiting flange is located on two opposite sides of the plate body along the third direction, the fixing portion is located on two opposite sides of the plate body along the second direction and is connected to two ends of the plate body along the third direction, the limiting flange and the fixing portion located on the same side in the third direction are spaced apart in the second direction to form the limiting groove between the limiting flange and the fixing portion, and the first direction, the second direction and the third direction intersect each other.

22. The battery module according to any one of claims 1 to 21, characterized in that: The end plate body is an integrally formed part.

23. The battery module according to any one of claims 1 to 21, characterized in that: The two end plates located at opposite ends of the battery cell group along the first direction are identical.

24. A battery, characterized in that: include: A battery module according to any one of claims 1 to 23.

25. An electrical device, characterized in that: include: A battery according to claim 24.

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