Self-locking clamping structure, battery module and battery pack

Abstract

The invention relates to a self-locking type clamping structure, a battery module and a battery pack, and relates to the technical field of batteries, the self-locking type clamping structure comprises a pole and a busbar, and the pole is provided with a positioning groove which is at least laterally opened; a clamping tongue is arranged on one side of the busbar, the clamping tongue is configured to be at least partially installed in the positioning groove in the lateral direction, and the surfaces of the two sides of the clamping tongue correspond to the opposite inner walls of the positioning groove respectively; the inner walls of the clamping tongue and the positioning groove are respectively provided with a positioning element and a clamping groove; the positioning element is assembled in the clamping groove so that the clamping tongue can be fixedly assembled in the positioning groove. Compared with the prior art, initial positioning is realized by arranging the clamping tongue and the positioning groove, and complete positioning is realized by assembling the positioning element in the clamping groove, so that the clamping tongue can be fixedly assembled in the positioning groove, the busbar and the pole can be relatively fixed and connected, and reliable connection between the busbar and the pole can be realized.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a self-locking card connection structure, a battery module and a battery pack. Background Art

[0002] At present, the connection between battery poles and busbars (aluminum or copper busbars) mostly relies on traditional screw fastening or welding processes. Although these methods ensure electrical connection to a certain extent, they face many challenges: screw fastening requires additional fasteners, which increases costs and assembly time. Although welding can provide a stronger mechanical connection, the welding point becomes a potential source of local overheating, affecting the heat dissipation effect, and there is a risk of welding leakage and poor welding. Summary of the invention

[0003] The purpose of the present application is to provide a self-locking clip-on structure, a battery module and a battery pack, which can achieve a reliable connection between the bus and the pole, and can achieve a fixed connection through its own structure without the need for additional fasteners or welding, thereby avoiding the defects caused by traditional screw fastening or welding processes, simplifying the assembly process, and enhancing the connection stability.

[0004] In order to achieve the above object, the present invention is implemented by the following scheme:

[0005] In a first aspect, the present invention provides a self-locking clamping structure, comprising:

[0006] A pole, the pole is arranged on the battery cell, and the pole is provided with a positioning groove which is at least open laterally;

[0007] A bus, wherein a latch tongue is disposed on one side of the bus, the latch tongue is configured to be at least partially inserted into the positioning groove along the lateral direction, and the two side surfaces of the latch tongue respectively correspond to the inner walls opposite to the positioning groove;

[0008] A positioning element is provided on at least one side surface of the latch tongue, and a latch groove is provided at a corresponding position of the inner wall of the positioning groove; or a latch groove is provided on at least one side surface of the latch tongue, and a positioning element is provided at a corresponding position of the inner wall of the positioning groove, and the positioning element is assembled in the latch groove so that the latch tongue is fixedly assembled in the positioning groove.

[0009] In an optional embodiment, a connecting plate is provided on one side of the bus bar, and the connecting plate extends in a direction away from the bus bar and is connected to the latch.

[0010] In an optional embodiment, the positioning element includes a positioning convex bump, the positioning convex bump is protruded on the surface of the tongue, and the positioning convex bump is arranged in the card slot.

[0011] In an optional embodiment, the positioning convex hump is in the shape of a truncated cone, and the shape of the slot is adapted to the shape of the positioning convex hump.

[0012] In an optional embodiment, the positioning element includes a positioning column and an elastic member, wherein the positioning column is arranged on the surface of the tongue and has a mounting groove with an opening facing away from the tongue, the elastic member is accommodated in the mounting groove and partially extends out of the positioning column, the positioning column corresponds to the slot, and the portion of the elastic member extending out of the positioning column is assembled in the slot.

[0013] In an optional embodiment, a guide groove is also provided on the inner wall of the positioning groove, one end of the guide groove extends to the side wall of the pole, and the other end extends to the positioning groove, and the guide groove is configured to accommodate the positioning element during the process of the tongue being installed into the positioning groove.

[0014] In an optional embodiment, the pole includes a base, a connecting portion and a limiting portion, the connecting portion is arranged on one side edge of the base, the limiting portion is connected to the connecting portion and extends toward the other side edge of the base, wherein the base and the limiting portion are arranged correspondingly at intervals, and the base, the connecting portion and the limiting portion jointly form the positioning groove.

[0015] In an optional embodiment, a phase change heat conductive layer is provided on a surface of the bus bar away from the latch tongue.

[0016] In an optional embodiment, the material of the phase-change thermal conductive layer includes at least one of an inorganic salt phase-change material, an organic salt phase-change material, a polymer-based phase-change material, and a nano-enhanced phase-change material.

[0017] In an optional embodiment, a heat conduction groove is provided on a surface of the bus bar away from the tongue, the phase change heat conduction layer is provided in the heat conduction groove, and the thickness of the phase change heat conduction layer is greater than or equal to the depth of the heat conduction groove.

[0018] In a second aspect, the present invention provides a battery module, comprising a plurality of battery cells and a self-locking clip structure as described in any one of the aforementioned embodiments, wherein the plurality of battery cells are arranged in an array, each of the battery cells is provided with a pole, and the bus is provided with two latches, which are configured to be at least partially inserted into the positioning grooves on adjacent poles along the lateral direction.

[0019] In an optional embodiment, the battery module further includes a cooling plate, which is disposed on the plurality of battery cells and contacts a side of the busbar away from the tongue.

[0020] In an optional embodiment, both end edges of the battery cell are provided with clearance grooves, and the poles are arranged in the clearance grooves.

[0021] In a third aspect, the present invention provides a battery pack, comprising a battery case and a battery module as described in any one of the aforementioned embodiments, wherein a plurality of battery cells are arranged in the battery case.

[0022] Through the above technical solution, the embodiment of the present invention is provided with a laterally open positioning groove on the pole, and a tongue is provided on one side of the busbar, the tongue is configured to be inserted into the positioning groove along the side, and the two side surfaces of the tongue correspond to the inner walls opposite to each other in the positioning groove, wherein at least one side surface of the tongue is provided with a positioning element, and the inner wall of the positioning groove is correspondingly provided with a slot, or at least one side surface of the tongue is provided with a slot, and the inner wall of the positioning groove is correspondingly provided with a positioning element, and the positioning element is correspondingly assembled in the slot, so that the tongue can be fixedly assembled in the positioning groove. Compared with the prior art, the embodiment of the present invention realizes initial positioning by providing a tongue and a positioning groove, and realizes complete positioning by assembling the positioning element in the slot, so that the tongue can be fixedly assembled in the positioning groove, so that the busbar and the pole can be relatively fixed and connected, and a reliable connection between the busbar and the pole can be realized. In addition, the embodiment of the present invention can realize fixed connection through its own structure, without the need for additional fasteners or welding, avoiding the defects caused by traditional screw fastening or welding processes, simplifying the assembly process, and enhancing the connection stability.

[0023] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 A schematic diagram of the assembly of the self-locking clamping structure provided in an embodiment of the present application at a first viewing angle;

[0026] Figure 2 A schematic diagram of the assembly of the self-locking clamping structure provided in an embodiment of the present application at a second viewing angle;

[0027] Figure 3 for Figure 1 Schematic diagram of the structure of the middle pole;

[0028] Figure 4 for Figure 1Schematic diagram of the assembly structure of the middle bus and the phase change heat conductive layer;

[0029] Figure 5 for Figure 1 Schematic diagram of the structure of the middle bus;

[0030] Figure 6 This is a schematic diagram of the structure of the bus in other preferred embodiments of the present application;

[0031] Figure 7 A schematic diagram of the structure of a battery module provided in an embodiment of the present application at a first viewing angle;

[0032] Figure 8 A schematic diagram of the structure of the battery module provided in an embodiment of the present application at a second viewing angle.

[0033] icon:

[0034] 100-self-locking snap-fit ​​structure; 110-pole; 111-positioning groove; 113-slot; 115-guide groove; 117-base; 118-connecting part; 119-limiting part; 130-bus; 131-tongue; 133-positioning element; 135-connecting plate; 136-positioning convex bump; 137-positioning column; 138-installation groove; 139-elastic member; 150-phase change heat conductive layer; 151-heat conductive groove; 200-battery module; 210-battery cell; 211-gap groove; 230-cooling plate. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0036] In the description of this application, it should be noted that the terms "inside", "outside", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the application is usually placed when in use, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0037] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" 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 this application can be understood according to specific circumstances.

[0038] See also Figure 1 and Figure 2 The embodiment of the present invention provides a self-locking snap-fit ​​structure 100, which can achieve a reliable connection between the bus 130 and the pole 110, and can achieve a fixed connection through its own structure without the need for additional fasteners or welding, thereby avoiding the defects caused by traditional screw fastening or welding processes, simplifying the assembly process, and enhancing the connection stability.

[0039] The self-locking clamping structure 100 provided in the embodiment of the present invention comprises a pole 110 and a bus bar 130. The pole 110 is arranged on the battery cell 210 (see Figure 7 ), and a positioning groove 111 with at least a lateral opening is provided on the pole 110; a tongue 131 is provided on one side of the busbar 130, and the tongue 131 is configured to be at least partially inserted into the positioning groove 111 along the lateral direction, and the two side surfaces of the tongue 131 respectively correspond to the inner walls opposite to the positioning groove 111; wherein, a positioning element 133 is provided on at least one side surface of the tongue 131, and the groove 113 is provided at a corresponding position of the inner wall of the positioning groove 111; or, a groove 113 is provided on at least one side surface of the tongue 131, and a positioning element 133 is provided at a corresponding position of the inner wall of the positioning groove 111, and the positioning element 133 is assembled in the groove 113, so that the tongue 131 is fixedly assembled in the positioning groove 111.

[0040] It should be noted that, in this embodiment, the positioning element 133 is provided on the bottom side surface of the tongue 131, and the bottom wall of the positioning groove 111 is provided with the groove 113 as an example for explanation. During actual assembly, multiple battery cells 210 are stacked in sequence along the X direction, and the tongue 131 on the bus 130 can be laterally inserted into the positioning groove 111 on the pole 110. After being inserted into place, the positioning element 133 is assembled correspondingly with the groove 113, so that the tongue 131 can be fixedly assembled in the positioning groove 111. The initial positioning is achieved by providing the tongue 131 and the positioning groove 111, and the complete positioning is achieved by assembling the positioning element 133 in the groove 113, so that the tongue 131 can be fixedly assembled in the positioning groove 111, so that the bus 130 and the pole 110 can remain relatively fixed and connected, and a reliable connection between the bus 130 and the pole 110 can be achieved. Furthermore, the embodiments of the present invention can achieve fixed connection through its own structure without the need for additional fasteners or welding, thus avoiding the defects caused by traditional screw fastening or welding processes, simplifying the assembly process, and enhancing connection stability.

[0041] In some embodiments, a connecting plate 135 is provided on one side of the busbar 130, the connecting plate 135 extends in a direction away from the busbar 130 and is connected to the tongue 131. Specifically, a connecting plate 135 is integrally provided on the bottom side of the busbar 130, the connecting plate 135 extends downward and is integrally connected to the tongue 131, so that the tongue 131 and the connecting plate 135 form an L-shaped bending structure.

[0042] It is worth noting that there are two connecting plates 135 and two latches 131 on one side of the busbar 130. The two connecting plates 135 are arranged at intervals on one side of the busbar 130. The two latches 131 are respectively bent and connected to the two connecting plates 135, and are bent in directions away from each other. During actual assembly, the two latches 131 can be respectively inserted into the positioning grooves 111 of the poles 110 on the adjacent battery cells 210, so as to realize the electrical connection between the two adjacent poles 110 through the busbar 130. Preferably, the two latches 131 are parallel to the busbar 130, so that the busbar 130 can remain horizontal when the two latches 131 are respectively inserted into the two adjacent positioning grooves 111.

[0043] It should be noted that in this embodiment, the tongue 131, the connecting plate 135 and the busbar 130 are integrally arranged and are all made of conductive metal, and have the characteristics of corrosion resistance and high conductivity, which can optimize the contact surface, reduce resistance, and improve the current transmission efficiency. And the pole 110 is also made of conductive material, so that good electrical connection performance can be achieved. Preferably, the pole 110 and the busbar 130 can be made of new corrosion-resistant and highly conductive new materials. The selection of new materials can greatly reduce the contact resistance and maintain low loss even in long-term use. At the same time, the corrosion resistance ensures the stable performance of the material in harsh environments and extends the overall life of the battery system. Among them, the new materials include but are not limited to: 1. Composite materials, such as copper plating with silver or nickel. The silver or nickel coating can not only improve the conductivity, but also enhance the corrosion resistance of the copper matrix, which is suitable for the surface treatment of the pole 110 and the busbar 130. 2. Nanomaterials, nanostructured copper, silver, graphene or carbon nanotube composites. These materials can significantly reduce contact resistance due to their large specific surface area and excellent conductivity, while improving the corrosion resistance of the materials through nanotechnology.

[0044] Furthermore, in order to better achieve limiting and prevent the tongue 131 from deflecting after being inserted into the positioning groove 111, two positioning elements 133 are provided on the bottom side surface of the tongue 131 in this embodiment. Correspondingly, two slots 113 are also provided on the bottom wall of the positioning groove 111. The two slots 113 are spaced apart along the X direction, and the two positioning elements 133 are respectively inserted into the two slots 113, where the X direction refers to the thickness direction of the battery cell 210.

[0045] See also Figures 3 to 5 In some embodiments, the positioning element 133 includes a positioning convex bump 136, which is convexly provided on the surface of the tongue 131 and assembled in the slot 113. The positioning convex bump 136 is integrally convexly provided on the bottom surface of the tongue 131. During actual installation, the tongue 131 is inserted into the positioning slot 111 under the action of external force. Since the tongue 131 has a certain elasticity, the positioning convex bump 136 slides inward along the bottom wall of the positioning slot 111 to the slot 113 to achieve positioning.

[0046] Further, the positioning convex bump 136 can be in the shape of a truncated cone, and the shape of the slot 113 is adapted to the shape of the positioning convex bump 136. Specifically, the positioning boss is in the shape of a truncated cone, which facilitates its sliding along the bottom wall of the positioning slot 111 to avoid being stuck.

[0047] It should be noted that, in order to more conveniently engage the latch tongue 131 , the positioning protrusion 136 may be made of an elastic material, such as plastic.

[0048] See also Figure 3 and Figure 6In some other preferred embodiments, the positioning element 133 includes a positioning column 137 and an elastic member 139. The positioning column 137 is arranged on the surface of the tongue 131 and has a mounting groove 138 with an opening facing away from the tongue 131. The elastic member 139 is accommodated in the mounting groove 138 and partially extends out of the positioning column 137. The positioning column 137 corresponds to the slot 113, and the portion of the elastic member 139 extending out of the positioning column 137 is assembled in the slot 113. Specifically, the positioning column 137 is integrally convexly arranged on the bottom side surface of the tongue 131, and the bottom end of the positioning column 137 is provided with a mounting groove 138 with an opening facing downward, and the mounting groove 138 can extend upward into the tongue 131. The elastic member 139 can be a spring member, which is accommodated in the mounting groove 138. When the positioning column 137 is aligned with the slot 113, the spring member can extend out of the positioning column 137 and be assembled in the slot 113 to achieve the fixation of the tongue 131. A gasket is also provided at the bottom end of the spring member, and the gasket can extend into the slot 113 correspondingly under the elastic force of the spring to achieve upper and lower structural limitation.

[0049] Please continue to see Figure 3 In some embodiments, a guide groove 115 is further provided on the inner wall of the positioning groove 111 where the clamping groove 113 is provided. One end of the guide groove 115 extends to the side wall of the pole 110, and the other end extends to the clamping groove 113. The guide groove 115 is configured to accommodate the positioning element 133 when the clamping tongue 131 is installed in the positioning groove 111. Specifically, a guide groove 115 is provided on the bottom wall of the positioning groove 111. One end of the guide groove 115 extends to the outside, and the other end extends inward to the clamping groove 113. The depth of the guide groove 115 is less than the depth of the clamping groove 113. When the clamping tongue 131 is installed in the positioning groove 111, the positioning protrusion or positioning column 137 can be accommodated through the guide groove 115. This design can ensure the smooth movement of the positioning element 133 in the horizontal direction by accurately realizing the geometric guidance between the pole 110 and the busbar 130, reducing lateral friction and offset, and reducing the possibility of operation errors. The close fit between the positioning element 133 and the guide groove 115 ensures that the predetermined position and posture can be achieved each time the installation is performed, thereby improving production efficiency and product uniformity. In addition, when the elastic member 139 is used, the setting of the guide groove 115 can not only realize the precise movement of the elastic member 139 in the horizontal direction, but also automatically limit the maximum compression amount of the spring when it is compressed, thereby preventing the spring from exceeding the limit compression distance.

[0050] In some embodiments, the pole 110 includes a base portion 117, a connection portion 118 and a stop portion 119, wherein the connection portion 118 is disposed at one side edge of the base portion 117, and the stop portion 119 is connected to the connection portion 118 and extends toward the other side edge of the base portion 117, wherein the base portion 117 and the stop portion 119 are disposed at intervals and correspond to each other, and the base portion 117, the connection portion 118 and the stop portion 119 jointly form a positioning groove 111. Specifically, the base portion 117, the connection portion 118 and the stop portion 119 are integrally formed, and the base portion 117 and the stop portion 119 are disposed at intervals and in parallel, thereby forming a positioning groove 111 therebetween. The connection portion 118 is located at the edge of the base portion 117 and the stop portion 119, and can serve as a stop position after the latch 131 is latched in place.

[0051] It should be noted that, in order to better fit the tongue 131 into the positioning groove 111, the width of the limiting portion 119 in the Y direction is smaller than the width of the limiting portion 119 in the same direction. The Y direction is perpendicular to the X direction and refers to the insertion direction of the tongue 131. This arrangement allows the base 117 to be partially exposed to the limiting portion 119, and the two slots 113 are just arranged in the exposed area of ​​the base 117. Therefore, in the process of inserting the tongue 131, the portion of the tongue 131 where the positioning element 133 is arranged can have more avoidance space, so that the positioning element 133 can be accurately positioned in the slot 113.

[0052] See also Figure 4 In some embodiments, a phase-change heat-conducting layer 150 is provided on the surface of the bus 130 away from the tongue 131. Specifically, the material of the phase-change heat-conducting layer 150 includes at least one of an inorganic salt phase-change material, an organic salt phase-change material, a polymer-based phase-change material, and a nano-enhanced phase-change material. In actual assembly, a cooling plate 230 is provided on the surface of the bus 130 away from the tongue 131. By providing a phase-change material layer, heat can be absorbed in a concentrated manner, so that the cooling plate 230 can carry heat accurately, meeting the high heat and high power heat dissipation requirements of the battery cell 210.

[0053] In some embodiments, a heat-conducting groove 151 is provided on the surface of one side of the bus 130 away from the tongue 131, and the phase-change heat-conducting layer 150 is provided in the heat-conducting groove 151, and the thickness of the phase-change heat-conducting layer 150 is greater than or equal to the depth of the heat-conducting groove 151. Specifically, there may be two heat-conducting grooves 151, and the two heat-conducting grooves 151 are arranged at intervals on the surface of the bus 130 and correspond to the positions of the two tongues 131 respectively, and a phase-change heat-conducting layer 150 is formed in each heat-conducting groove 151, so that the heat distribution on the bus 130 can be changed, so that the heat is concentrated and taken away by the phase-change heat-conducting layers 150 on both sides, thereby avoiding the phenomenon of low heat conduction efficiency caused by the heat concentration phenomenon.

[0054] It should be noted that in order to ensure that the upper cooling plate 230 can fully contact the phase change thermal conductive layer 150 , the thickness of the phase change thermal conductive layer 150 can be slightly greater than the depth of the thermal conductive groove 151 , so that the phase change thermal conductive layer 150 can slightly protrude from the bus 130 .

[0055] See also Figure 7 and Figure 8 The embodiment of the present invention further provides a battery module 200, comprising a plurality of battery cells 210 and the aforementioned self-locking clamping structure 100, wherein the self-locking clamping structure 100 comprises a pole 110 and a bus bar 130, wherein the pole 110 is arranged on the battery cell 210, and a positioning groove 111 which is at least laterally open is arranged on the pole 110; a latch tongue 131 is arranged on one side of the bus bar 130, and the latch tongue 131 is configured to be at least partially inserted into the positioning groove 111 along the lateral direction, and the latch tongue 131 The two side surfaces of the latch 131 correspond to the inner walls opposite to the positioning groove 111; wherein, at least one side surface of the latch 131 is provided with a positioning element 133, and the inner wall of the positioning groove 111 is provided with a latch 113 at a corresponding position; or, at least one side surface of the latch 131 is provided with a latch 113, and the inner wall of the positioning groove 111 is provided with a positioning element 133, and the positioning element 133 is assembled in the latch 113, so that the latch 131 is fixedly assembled in the positioning groove 111. Among them, a plurality of battery cells 210 are arranged in an array, each battery cell 210 is provided with a pole 110, and two latches 131 are provided on the bus 130, and the two latches 131 are configured to be at least partially inserted into the positioning grooves 111 on the adjacent poles 110 along the lateral direction.

[0056] In this embodiment, a plurality of battery cells 210 are stacked in sequence along the X direction, and poles 110 are provided at both ends of each battery cell 210 along the Y direction. The poles 110 of two adjacent battery cells 210 are connected in series via a bus 130 .

[0057] Furthermore, the battery module 200 further includes a cooling plate 230, which is disposed on the plurality of battery cells 210 and contacts the side of the busbar 130 away from the tongue 131. Specifically, the cooling plate 230 may be a liquid cooling plate, which is laid on the upper side of the plurality of battery cells 210, and the cooling plate 230 can contact the phase change heat conductive layer 150 on the busbar 130, thereby taking away the heat concentrated in the phase change heat conductive layer 150, realizing precise heat conduction to take away the heat of the battery cells 210, and improving the heat dissipation effect.

[0058] In some embodiments, the two end edges of the battery cell 210 are provided with clearance grooves 211, and the pole 110 is disposed in the clearance grooves 211. Specifically, the two end edges of the battery cell 210 along the Y direction are provided with clearance grooves 211, so that the pole 110 is designed to be sunken, which is convenient for clamping the bus 130. In addition, the battery cell 210 is designed to be convex as a whole, which is conducive to space saving and convenient for accommodating the bus 130 and the phase change material layer.

[0059] The embodiment of the present invention further provides a battery pack, including a battery case (not shown) and a battery module 200 . The battery module 200 includes a plurality of battery cells 210 and a self-locking clamping structure 100 . The plurality of battery cells 210 are arranged in the battery case. The self-locking clamping structure 100 includes a pole 110 and a busbar 130. The pole 110 is arranged on the battery cell 210, and a positioning groove 111 with at least a lateral opening is arranged on the pole 110; a latch tongue 131 is arranged on one side of the busbar 130, and the latch tongue 131 is configured to be at least partially inserted into the positioning groove 111 along the lateral direction, and the two side surfaces of the latch tongue 131 respectively correspond to the inner walls opposite to the positioning groove 111; wherein, a positioning element 133 is arranged on at least one side surface of the latch tongue 131, and the latch groove 113 is arranged at a corresponding position of the inner wall of the positioning groove 111; or, a latch groove 113 is arranged on at least one side surface of the latch tongue 131, and a positioning element 133 is arranged at a corresponding position of the inner wall of the positioning groove 111, and the positioning element 133 is assembled in the latch groove 113, so that the latch tongue 131 is fixedly assembled in the positioning groove 111. Among them, multiple battery cells 210 are arranged in an array, each battery cell 210 is provided with a pole 110, and two latches 131 are provided on the bus 130. The two latches 131 are configured to be at least partially inserted into the positioning grooves 111 on the adjacent poles 110 along the lateral direction.

[0060] In summary, the self-locking snap-fit ​​structure 100, the battery module 200 and the battery pack provided by the embodiments of the present invention are configured by providing a laterally opening positioning groove 111 on the pole 110, and providing a latch tongue 131 on one side of the bus 130, the latch tongue 131 being configured to be laterally inserted into the positioning groove 111, and the two side surfaces of the latch tongue 131 respectively correspond to the opposite inner walls in the positioning groove 111, wherein at least one side surface of the latch tongue 131 is provided with a positioning element 133, and the inner wall of the positioning groove 111 is correspondingly provided with the latch groove 113, or at least one side surface of the latch tongue 131 is provided with a latch groove 113, and the inner wall of the positioning groove 111 is correspondingly provided with the positioning element 133, and the positioning element 133 is correspondingly assembled in the latch groove 113, so that the latch tongue 131 can be fixedly assembled in the positioning groove 111. Compared with the prior art, the embodiment of the present invention realizes initial positioning by providing the latch tongue 131 and the positioning groove 111, and realizes complete positioning by assembling the positioning element 133 in the latch groove 113, so that the latch tongue 131 can be fixedly assembled in the positioning groove 111, so that the busbar 130 and the pole 110 can be relatively fixed and connected, and a reliable connection between the busbar 130 and the pole 110 can be achieved. In addition, the embodiment of the present invention can achieve fixed connection through its own structure without the need for additional fasteners or welding, avoiding the defects caused by traditional screw fastening or welding processes, simplifying the assembly process, and enhancing the connection stability.

[0061] It should be noted that, in the absence of conflict, the features in the embodiments of this application may be combined with each other.

[0062] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A self-locking clamping structure, characterized in that: include: A pole (110), the pole (110) being arranged on the battery core (210), and the pole (110) being provided with a positioning groove (111) which is at least open laterally; A busbar (130), wherein a latch tongue (131) is provided on one side of the busbar (130), and the latch tongue (131) is configured to be inserted into the positioning groove (111) along the side direction, and the two side surfaces of the latch tongue (131) respectively correspond to the inner walls opposite to the positioning groove (111); Wherein, at least one side surface of the latch tongue (131) is provided with at least one positioning element (133), and at least one latch groove (113) is provided at a corresponding position of the inner wall of the positioning groove (111); or, at least one side surface of the latch tongue (131) is provided with at least one latch groove (113), and at least one positioning element (133) is provided at a corresponding position of the inner wall of the positioning groove (111), and the positioning element (133) is correspondingly assembled in the latch groove (113), so that the latch tongue (131) is fixedly assembled in the positioning groove (111).

2. The self-locking clamping structure according to claim 1, characterized in that: A connecting plate (135) is provided on one side of the busbar (130); the connecting plate (135) extends in a direction away from the busbar (130) and is connected to the latch tongue (131).

3. The self-locking clamping structure according to claim 1, characterized in that: The positioning element (133) comprises a positioning convex bump (136), the positioning convex bump (136) is protruding from the surface of the latch tongue (131), and the positioning convex bump (136) is assembled in the latch groove (113).

4. The self-locking clamping structure according to claim 3, characterized in that: The positioning convex bump (136) is in the shape of a truncated cone, and the shape of the clamping groove (113) is adapted to the shape of the positioning convex bump (136).

5. The self-locking clamping structure according to claim 1, characterized in that: The positioning element (133) comprises a positioning column (137) and an elastic member (139); the positioning column (137) is arranged on the surface of the latch tongue (131) and has a mounting groove (138) whose opening faces away from the latch tongue (131); the elastic member (139) is accommodated in the mounting groove (138) and partially extends out of the positioning column (137); the positioning column (137) corresponds to the latch groove (113); the portion of the elastic member (139) extending out of the positioning column (137) is assembled in the latch groove (113).

6. The self-locking clamping structure according to claim 3 or 5, characterized in that: A guide groove (115) is also provided on the inner wall of the positioning groove (111) on which the clamping groove (113) is provided. One end of the guide groove (115) extends to the side wall of the pole (110), and the other end extends to the clamping groove (113). The guide groove (115) is configured to accommodate the positioning element (133) when the clamping tongue (131) is installed in the positioning groove (111).

7. The self-locking clamping structure according to claim 1, characterized in that: The pole (110) comprises a base portion (117), a connecting portion (118) and a limiting portion (119), wherein the connecting portion (118) is arranged on one side edge of the base portion (117), and the limiting portion (119) is connected to the connecting portion (118) and extends toward the other side edge of the base portion (117), wherein the base portion (117) and the limiting portion (119) are arranged in a corresponding manner at intervals, and the base portion (117), the connecting portion (118) and the limiting portion (119) jointly form the positioning groove (111).

8. The self-locking clamping structure according to claim 1, characterized in that: A phase-change heat-conducting layer (150) is provided on a surface of one side of the busbar (130) away from the latch tongue (131), a heat-conducting groove (151) is provided on a surface of one side of the busbar (130) away from the latch tongue (131), the phase-change heat-conducting layer (150) is arranged in the heat-conducting groove (151), and the thickness of the phase-change heat-conducting layer (150) is greater than or equal to the depth of the heat-conducting groove (151).

9. A battery module, characterized in that: The invention comprises a plurality of battery cells (210) and a self-locking clamping structure as claimed in any one of claims 1 to 8, wherein the plurality of battery cells (210) are arranged in an array, each of the battery cells (210) is provided with the pole (110), and the busbar (130) is provided with two clamping tongues (131), and the two clamping tongues (131) are configured to be at least partially inserted into the positioning grooves (111) on the adjacent poles (110) along the lateral direction.

10. A battery pack, characterized in that: It comprises a battery box and the battery module as claimed in claim 9, wherein a plurality of battery cells (210) are arranged in the battery box.

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