Battery module and high-voltage support thereof

Abstract

The utility model discloses a battery module and a high-voltage support thereof, the high-voltage support comprises a support body and a nut, the nut is arranged on the support body, two symmetrically arranged limiting pieces are arranged on the bearing surface of the support body, and the limiting pieces are arranged on the bearing surface of the support body. Each limiting piece comprises a supporting arm extending upwards from the corresponding bearing face and a limiting protruding block extending horizontally, the limiting protruding blocks of the two limiting pieces are oppositely arranged, floating grooves are formed among the bearing faces, the supporting arms and the limiting protruding blocks, connecting parts horizontally protruding outwards are arranged on the left side and the right side of the nut, and the supporting arms and the limiting protruding blocks are arranged on the left side and the right side of the nut respectively. The connecting part is located in the floating groove, and the thickness of the connecting part is smaller than the depth of the floating groove so that the connecting part can move up and down in the floating groove. According to the technical scheme, larger size redundancy can be achieved, stress concentration at the connecting points can be eliminated, the requirement for the size precision of parts is lowered, and meanwhile the problems in the assembling process are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of battery modules, in particular to a battery module and a high-voltage support thereof. Background Art

[0002] A battery module is a unit assembled from multiple cells to provide higher voltage and capacity. It consists of several cells, connectors, a battery management system (BMS), and a casing. The main function of a battery module is to connect multiple cells together to increase the voltage and energy storage capacity of the battery system. By connecting cells in parallel or in series, battery modules can meet the power requirements of different applications. The cell tabs are metal conductors that lead the positive and negative electrodes from the cell and are the contact points during charging and discharging. Copper busbars are usually used as the main busbars for connection and conduction in battery systems. They are also called copper busbars. Their function is to connect the tabs of the cell to the external high-voltage circuit. The high-voltage support is used to bolt the tabs and the copper busbars together and is generally installed on the end plate of the battery module.

[0003] The existing high-voltage support connection point is fixed by using a fixing bolt and an insert nut in the plastic support. When the nut is embedded in the plastic support, its position is fixed and cannot be adjusted later. This means that during the assembly process, the dimensional accuracy of the parts at the connection is very high, and any deviation may cause assembly problems. If there is a position error in the external connection, stress concentration may occur at the connection between the nut and the bolt. This stress concentration may cause the local stress of the connection to exceed the yield strength of the material, thereby increasing the risk of back-twisting. Utility Model Content

[0004] To this end, it is necessary to provide a battery module and a high-voltage support thereof to solve the problem that the insert nut equipped with the existing high-voltage support requires higher dimensional accuracy.

[0005] To achieve the above-mentioned purpose, the present embodiment provides a high-voltage support, including a support body and a nut, the support body is provided with the nut, the nut is used to be threadedly connected with the bolt to fix the copper busbar and the pole ear, the bearing surface of the support body is provided with two symmetrically arranged limit members, the limit members include a support arm extending upward from the bearing surface and a limit protrusion extending horizontally, the limit protrusions of the two limit members are arranged opposite to each other, and a floating groove is formed between the bearing surface, the support arm and the limit protrusion, the left and right sides of the nut are provided with a connecting portion protruding horizontally outward, the connecting portion is located in the floating groove, the thickness of the connecting portion is less than the depth of the floating groove so that the connecting portion can move up and down in the floating groove, and the part of the nut corresponding to the screw hole protrudes upward from the interval between the two limit protrusions.

[0006] Furthermore, the support arm is a plastic support arm, the inner side wall of the support arm is provided with a first card block protruding outward, the outer side wall of the connecting part is provided with a first card groove recessed inward, the first card groove is engaged with the first card block, and the first card block extends up and down to guide the connecting part to move up and down.

[0007] Furthermore, the bearing surface is provided with a second clamping block protruding upward, and the lower surface of the connecting portion is provided with a second clamping groove recessed inward, and the second clamping groove is clamped with the second clamping block.

[0008] Furthermore, the cross section of the limiting member is an inverted L-shape, and the left and right connecting parts of the nut can be placed in the two floating grooves along the horizontal direction.

[0009] Furthermore, the support body is provided with a groove, the upper opening of the groove is located on the bearing surface, and the high-pressure support also includes a bolt, which is threadedly connected to the nut and extends into the groove.

[0010] Furthermore, the support body includes three retaining walls protruding upward from three side edges of the bearing surface, and the three retaining walls form a [ shape.

[0011] Furthermore, among the three retaining walls, a hook is provided on the outer walls of two of the retaining walls that are arranged opposite to each other.

[0012] To achieve the above-mentioned purpose, the present embodiment also provides a battery module, including a high-voltage support, a battery cell assembly and a copper busbar, the high-voltage support is the high-voltage support described in any one of the above-mentioned embodiments, the battery cell assembly is provided with an extending pole ear, the pole ear and the copper busbar are provided with slots for the bolts of the high-voltage support to pass through, the bolt cooperates with the nut to fix the copper busbar and the pole ear, and the pole ear is used to connect the high-voltage circuit.

[0013] Different from the prior art, the above technical solution has the following beneficial effects:

[0014] In actual application, first pass the bolt through the reserved holes on the copper bar and the pole lug, and then align it with the screw hole of the nut. When the bolt is tightened, the floating nut will float up with the thread until the part of the nut corresponding to the screw hole fits the lower surface of the pole lug, and the range of the gap between the lower surface of the pole lug and the high-voltage support is the same as the floating range of the nut. This automatic adjustment function allows the parts at the connection to have greater dimensional redundancy, eliminates stress concentration at the connection point, reduces the requirements for the dimensional accuracy of the parts, and also reduces problems in the assembly process. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a three-dimensional diagram of the support body in this embodiment;

[0016] Figure 2 is a cross-sectional view of the support body in this embodiment;

[0017] Figure 3 This is a three-dimensional diagram of the connection between the support body, the pole ear, and the copper busbar in this embodiment;

[0018] Figure 4 is a top view of the support body in this embodiment;

[0019] Figure 5 It is a cross-sectional view of the support body, bolts and bolts connected in this embodiment;

[0020] Figure 6 It is a top view of the connection between the support body, the pole ear and the copper busbar in this embodiment.

[0021] Description of reference numerals:

[0022] 1. High-voltage support;

[0023] 11. Support body; 111. Limiting member; 112. Support arm; 113. Limiting protrusion; 114. Floating groove; 115. Bearing surface; 116. First clamping block; 117. Second clamping block; 118. Groove; 119. Stop wall; 1191. Hook; 110. Limiting wall;

[0024] 12. nut; 121. first slot; 122. second slot; 123. connecting portion;

[0025] 13. Bolts;

[0026] 14. Gasket;

[0027] 2. Earpiece;

[0028] 3. Copper busbar. DETAILED DESCRIPTION

[0029] In order to explain in detail the possible application scenarios, technical principles, specific schemes that can be implemented, and the purposes and effects that can be achieved, the following is a detailed description of the specific embodiments listed in conjunction with the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0030] Reference to "embodiment" herein 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 application. The term "embodiment" appearing in various places in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or association with other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, the various technical features mentioned in the embodiments can be combined in any way to form a corresponding implementable technical solution.

[0031] Unless otherwise defined, the technical terms used in this document have the same meanings as those generally understood by those skilled in the art to which this application belongs; the use of relevant terms in this document is only for describing specific embodiments and is not intended to limit this application.

[0032] In the description of this application, the term "and / or" is an expression used to describe the logical relationship between objects, indicating that three relationships may exist, for example, A and / or B, which means: A exists, B exists, and A and B exist at the same time. In addition, the character " / " in this article generally indicates that the objects before and after are in an "or" logical relationship.

[0033] In the present application, terms such as “first” and “second” are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship of quantity, priority or sequence between these entities or operations.

[0034] Without further limitations, in this application, the words "include", "comprises", "has" or other similar expressions used in the sentences are intended to cover non-exclusive inclusion. These expressions do not exclude the presence of additional elements in the process, method or product including the elements, so that the process, method or product including a series of elements may include not only those limited elements, but also other elements not explicitly listed, or also include elements inherent to such process, method or product.

[0035] Similar to the understanding in the Examination Guidelines, in this application, expressions such as "greater than", "less than", "exceed" and the like are understood to exclude the number itself; expressions such as "above", "below", "within" and the like are understood to include the number itself. In addition, in the description of the embodiments of this application, "multiple" means more than two (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups", "multiple times", etc., unless otherwise clearly and specifically limited.

[0036] In the description of the embodiments of the present application, space-related expressions used, such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or position relationship based on the orientation or position relationship shown in the specific embodiments or drawings, and are only for the convenience of describing the specific embodiments of the present application or facilitating the reader's understanding, and do not indicate or imply that the referred device or component must have a specific position, a specific orientation, or be constructed or operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0037] Unless otherwise expressly specified or limited, in the description of the embodiments of the present application, the terms such as "install", "connect", "connect", "fix", "set", etc. used should be understood in a broad sense. For example, the "connection" can be a fixed connection, a detachable connection, or an integrated setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For technicians in the technical field to which the present application belongs, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0038] See also Figures 1 to 6 The present embodiment provides a high-voltage support, including a support body 11 and a nut 12. The support body 11 is provided with a nut 12, and the nut 12 is used to be threadedly connected with a bolt 13 to fix the copper bus 3 and the pole ear 2. Two symmetrically arranged limit members 111 are provided on the bearing surface 115 of the support body 11. The limit members 111 include a support arm 112 extending upward from the bearing surface 115 and a limit projection 113 extending horizontally. The limit projections 113 of the two limit members 111 are arranged opposite to each other. A floating groove 114 is formed between the bearing surface 115, the support arm 112, and the limit projection 113. The left and right sides of the nut 12 are provided with a connecting portion 123 protruding horizontally outward. The connecting portion 123 is located in the floating groove 114, and the thickness of the connecting portion 123 (such as Figure 2 d2) is less than the depth of the floating groove 114 (as shown in FIG. Figure 2 As shown in d1 , the connecting portion 123 can move up and down in the floating groove 114 , and the portion of the nut 12 corresponding to the screw hole protrudes upward from the interval between the two limiting protrusions 113 .

[0039] Two symmetrical limiting members 111 are arranged on the bearing surface 115, each limiting member 111 is composed of a support arm 112 extending vertically upward from the bearing surface 115 and a limiting protrusion 113 extending horizontally from the end of the support arm 112. The two limiting protrusions 113 are arranged opposite to each other, and the limiting protrusions 113, the bearing surface 115 and the support arm 112 together form a floating groove 114.

[0040] The nut 12 is designed to have horizontal connecting parts 123 on the left and right sides, which protrude horizontally outward from the main body of the nut 12 and are located in the floating groove 114. Among them, the limiting protrusion 113 is located above the connecting part 123, abutting against the connecting part 123 to prevent the nut 12 from escaping from the floating groove 114 upward. Since the thickness of the connecting part 123 is less than the depth of the floating groove 114, the nut 12 can move up and down in the floating groove 114 and has a certain floating property. At the same time, the interval between the two limiting protrusions 113 is deliberately designed to be large enough to ensure that the screw hole of the nut 12 can be fully exposed, so as to facilitate the screwing in and out of the bolt 13.

[0041] See also Figure 3 and Figure 6 In actual application, firstly, the bolt 13 is passed through the reserved holes on the copper busbar 3 and the pole lug 2, and then aligned with the screw hole of the nut 12. When the bolt 13 is tightened, the floating nut 12 will float up with the thread until the part of the nut 12 corresponding to the screw hole fits the lower surface of the pole lug 2, and the range of the gap between the lower surface of the pole lug 2 and the high-voltage support 1 is the same as the floating range of the nut 12. This automatic adjustment function allows the parts at the connection to have greater dimensional redundancy, eliminates stress concentration at the connection point, reduces the requirements for the dimensional accuracy of the parts, and also reduces problems in the assembly process.

[0042] See also Figure 1 In this embodiment, the support body 11 is insulated and is usually made of plastic, which can effectively isolate the electrical connection between the high-voltage equipment and the surrounding environment to ensure safety in use. As part of the support body 11, the support arm 112, the limiting protrusion 113, the retaining wall 119, etc. are also made of plastic.

[0043] See also Figure 1 and Figure 4 In this embodiment, the inner wall of the support arm 112 is provided with a first card block 116 protruding outward, and the outer wall of the connecting portion 123 is provided with a first card groove 121 recessed inward. The first card groove 121 is engaged with the first card block 116, and the first card block 116 extends up and down to guide the connecting portion 123 to move up and down.

[0044] The inner side wall of the support arm 112, i.e., the side facing the floating groove 114, is designed with a first clamping block 116 protruding outward. These first clamping blocks 116 extend along the height direction of the support arm 112 to form a certain guide structure. On the outer side walls of the connecting portion 123 on the left and right sides of the nut 12, there are first clamping grooves 121 recessed inwardly. The shape and size of these first clamping grooves 121 match the first clamping blocks 116 on the support arm 112, so that the first clamping blocks 116 can be smoothly clamped into the first clamping grooves 121. During the assembly process, the nut 12 is first moved horizontally and placed in the floating groove 114, and then the first clamping block 116 is pressed downward into the first clamping groove 121 along the outer side wall of the connecting portion 123 to achieve clamping. This clamping method not only ensures the stable position of the nut 12 in the floating groove 114, but also provides a clear guide for the up and down floating of the nut 12. Due to the feature that the first clamping block 116 extends up and down, it can effectively limit the lateral movement of the nut 12 , ensuring that the nut 12 floats stably in the vertical direction in the floating groove 114 .

[0045] See also Figure 2 In this embodiment, a second clamping block 117 protruding upward is provided on the bearing surface 115 , and a second clamping groove 122 recessed inward is provided on the lower surface of the connecting portion 123 , and the second clamping groove 122 is clamped with the second clamping block 117 .

[0046] During the assembly process, when the nut 12 is placed in the floating groove 114 and reaches a suitable floating position, the lower surface of the connecting portion 123 is fitted with the bearing surface 115. At this time, the second clamping groove 122 on the lower surface of the connecting portion 123 is aligned with the second clamping block 117 on the bearing surface 115, which plays a role of rough limiting.

[0047] See also Figure 1 and Figure 2 In this embodiment, the cross section of the stopper 111 is an inverted L-shape, and the left and right connecting parts 123 of the nut 12 can be placed in the two floating grooves 114 in the horizontal direction. The connecting part 123 of the nut 12 is aligned with the position between the two stoppers 111 in the horizontal direction, and then pushed in until the connecting part 123 completely enters the floating groove 114, after which the nut 12 can float up and down within the allowable range of the floating groove 114.

[0048] See also Figure 1 In this embodiment, the two limiting members 111 can also be connected by a limiting wall 110. The limiting members 111 and the limiting wall 110 are integrally formed to form a "["-shaped structure. The limiting wall 110 can limit the nut 12 and enhance the overall structural strength.

[0049] See also Figure 2 and Figure 5In this embodiment, the support body 11 is provided with a groove 118, the upper opening of the groove 118 is located on the bearing surface 115, the diameter of the groove 118 is greater than the diameter of the bolt 13, and the high-pressure support 1 also includes a bolt 13, the bolt 13 is threadedly connected with the nut 12, and extends into the groove 118. The bolt 13 is aligned with the screw hole of the nut 12 and screwed into the screw hole. As the bolt 13 is screwed in, it gradually extends into the groove 118 of the support body 11, thereby improving the adaptability of the connection.

[0050] See also Figure 1 and Figure 4 In this embodiment, the support body 11 includes three retaining walls 119 protruding upward from the three side edges of the bearing surface 115, and the three retaining walls 119 form a [ shape. The three retaining walls 119 are respectively located on the left side, right side and rear side of the bearing surface 115 (assuming that when we face the bearing surface 115, there are four directions: front, rear, left and right), thereby forming a structure similar to the "[" shape. The front side remains open to facilitate the accommodation of the copper busbar 3. The function of the three retaining walls 119 is to provide additional support and protection, enhance the overall structural strength of the high-voltage support 1, and improve its stability when subjected to external force or vibration.

[0051] Among the three retaining walls 119, a hook 1191 is provided on the outer wall of two oppositely arranged retaining walls 119. The two hooks 1191 can be symmetrical or asymmetrical, and the specific shape and size depend on actual needs. The main function of the hook 1191 is to achieve rapid connection or fixation of the high-voltage support 1 with other components by cooperating with corresponding holes on other components or structures. This design makes the installation and disassembly process of the high-voltage support 1 simpler and faster, while improving the firmness and stability of the connection. Preferably, the support body 11 is snapped onto the end plate of the battery module, that is, a hole corresponding to the hook 1191 is provided on the end plate.

[0052] See also Figures 1 to 6 , this embodiment also provides a battery module, including a high-voltage support 1, a battery cell assembly and a copper bar 3. The high-voltage support 1 is the high-voltage support described in any of the above embodiments. The battery cell assembly is provided with an extended pole ear 2. The pole ear 2 and the copper bar 3 are provided with slots for the bolts 13 of the high-voltage support 1 to pass through. The bolts 13 cooperate with the nuts 12 to fix the copper bar 3 and the pole ear 2. The copper bar 3 is used to connect the high-voltage circuit. The copper bar 3 serves as a connecting part 123 of the high-voltage circuit and is responsible for transmitting the electric energy generated by the battery cell assembly to the external circuit for use. After the bolt 13 passes through the slot, it cooperates with the nut 12 to tighten, and the copper bar 3 is tightly connected to the pole ear 2. If necessary, a gasket 14 can be used to achieve a better connection. This connection method not only ensures the stable transmission of current, but also improves the firmness and reliability of the connection.

[0053] It should be noted that although the above embodiments have been described in this article, this does not limit the scope of patent protection of the utility model. Therefore, based on the innovative concept of the utility model, changes and modifications to the embodiments described in this article, or equivalent structural or equivalent process changes made using the contents of the utility model specification and drawings, directly or indirectly applying the above technical solutions to other related technical fields are all included in the scope of protection of the utility model patent.

Claims

1. A high-voltage support, comprising a support body and a nut, wherein the support body is provided with the nut, and the nut is used to be threadedly connected with a bolt to fix a copper bar and a lug, characterized in that: Two symmetrically arranged limit members are provided on the bearing surface of the support body, and the limit members include a support arm extending upward from the bearing surface and a limit protrusion extending horizontally. The limit protrusions of the two limit members are arranged opposite to each other, and a floating groove is formed between the bearing surface, the support arm and the limit protrusion. The left and right sides of the nut are provided with connecting parts protruding horizontally outward, and the connecting part is located in the floating groove. The thickness of the connecting part is less than the depth of the floating groove so that the connecting part can move up and down in the floating groove, and the part of the nut corresponding to the screw hole protrudes upward from the interval between the two limit protrusions.

2. The high-voltage support according to claim 1, characterized in that: The support arm is a plastic support arm, and the inner side wall of the support arm is provided with a first block protruding outward, and the outer side wall of the connecting part is provided with a first groove recessed inward, the first groove is engaged with the first block, and the first block extends up and down to guide the connecting part to move up and down.

3. The high-voltage support according to claim 1, characterized in that: The carrying surface is provided with a second clamping block protruding upward, and the lower surface of the connecting portion is provided with a second clamping groove recessed inward, and the second clamping groove is clamped with the second clamping block.

4. The high-voltage support according to claim 1, characterized in that: The cross section of the limiting member is an inverted L-shape, and the left and right connecting parts of the nut can be placed in the two floating grooves along the horizontal direction.

5. The high-voltage support according to claim 1, characterized in that: The support body is provided with a groove, the upper opening of the groove is located on the bearing surface, and the high-pressure support also includes a bolt, which is threadedly connected with the nut and extends into the groove.

6. The high-voltage support according to claim 1, characterized in that: The support body includes three retaining walls protruding upward from three side edges of the bearing surface, and the three retaining walls form a [ shape.

7. The high-voltage support according to claim 6, characterized in that: Among the three baffle walls, a hook is provided on the outer walls of two oppositely arranged baffle walls.

8. A battery module, comprising a high-voltage support, a battery cell assembly and a copper busbar, wherein the high-voltage support is the high-voltage support according to any one of claims 1 to 7, the battery cell assembly is provided with an extending pole ear, the pole ear and the copper busbar are provided with slots for the bolts of the high-voltage support to pass through, the bolt cooperates with the nut to fix the copper busbar and the pole ear, and the pole ear is used to connect a high-voltage circuit.

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