Copper bar fixing structure, battery pack and electric device

Abstract

The utility model relates to the technical field of battery pack processing, and discloses a copper bar fixing structure, a battery pack and an electric device, the fixing structure comprises a fixing seat and a protective cover; the fixing seat comprises a fixing part and a clamping part, the clamping part is provided with a first end and a second end opposite to the first end in the length direction, the fixing part and the clamping part are integrally connected through the first end, the second end is connected with one end of the protective cover in an opening and closing mode, and the fixing part is connected with the other end of the protective cover in a buckling mode; according to the copper bar fixing structure, the copper bar can be fixed in the battery pack through the clamping part and the fixing part, and the fixing part and the clamping part are integrally connected through the first end, so that when the copper bar fixing structure is installed, after the clamping part is matched with the protective cover to clamp the copper bar, the clamping part can be firstly placed in a narrow and deep space; and the copper bar fixing structure is fixed through the fixing part, so that an operation space does not need to be additionally reserved when the copper bar fixing structure is fixed or disassembled, the fixing structure is convenient to disassemble and assemble, and the disassembly and assembly of the copper bar can be efficiently fixed and maintained.

Description

Technical Field

[0001] The utility model relates to the technical field of battery pack processing, in particular to a copper busbar fixing structure, a battery pack and an electrical device. Background Art

[0002] In the prior art, copper busbars are usually fixed with clip ties. However, the clip ties cannot be used to arrange multiple copper busbars in parallel, and the copper busbars need to be manually bundled and positioned using the ties. After tightening the ties, the ends of the ties need to be cut. The operation method is complicated and inefficient, which is not conducive to the installation and replacement of the copper busbars. At the same time, in order to meet the requirements of compact layout space in the battery pack, the Chinese utility model patent with authorization announcement number CN220710787U provides a fixing structure, a power battery and a vehicle, the fixing structure comprising: a fixing bracket, a cover plate and a connector, the connector being connected to the fixing bracket, the fixing bracket being provided with a through high-voltage copper busbar fixing groove, the cover plate being openably arranged to cover the notch of the high-voltage copper busbar fixing groove, the cover plate being provided with a through low-voltage wiring harness fixing groove on the side facing the high-voltage copper busbar fixing groove, the low-voltage wiring harness fixing groove being used to place a low-voltage wiring harness with a sleeve on the outer sleeve, and the low-voltage wiring harness fixing groove being in contact with one side of the low-voltage wiring harness, and when the cover plate is closed on the high-voltage copper busbar fixing groove, the other side of the low-voltage wiring harness is in contact with the high-voltage copper busbar in the high-voltage copper busbar fixing groove. The fixing structure of the above technical solution can simultaneously fix the high-voltage copper busbar and the low-voltage wiring harness, that is, it integrates the fixing functions of the high-voltage copper busbar fixing structure and the low-voltage fixing structure into one, the fixing structure has a higher degree of integration, and saves space inside the power battery.

[0003] However, in the fixing structure of the above technical solution, the connector for fixing the entire fixing structure is arranged below the positioning portion. When the copper busbar is fixed and installed, it is mainly fixed by bottom plugging. When the layout space utilization rate in the battery pack is higher, the space for the copper busbar becomes narrower. In addition, the effect of the height of the battery cell stack and the box body further compresses the operating space of the plug-in method. This method is not convenient for disassembling and assembling the fixing structure, and thus cannot efficiently fix the copper busbar. Utility Model Content

[0004] The main purpose of the present invention is to provide a copper busbar fixing structure, a battery pack and an electrical device, aiming to solve the technical problem in the background art that the copper busbar fixing device in the existing battery pack is inconvenient to disassemble and assemble.

[0005] In order to achieve the above-mentioned purpose of the utility model, the utility model proposes a copper busbar fixing structure on the one hand, including: a fixing base and a protective cover; the fixing base includes a fixing portion and a clamping portion, the clamping portion has a first end and a second end opposite to the first end along the length direction, the fixing portion and the clamping portion are integrally connected through the first end, the second end is openably connected to one end of the protective cover, and the fixing portion is buckled and connected to the other end of the protective cover.

[0006] Furthermore, the second end and the connected end of the protective cover are both provided with transition arc segments with gradually decreasing thickness, and the transition arc segments are connected to form a bending groove.

[0007] Furthermore, a limiting spacer is provided on the inner side of the clamping portion or the protective cover along the length direction, and a mounting groove is formed between the limiting spacers and / or between the limiting spacer and the fixing portion for placing the copper busbar.

[0008] Furthermore, a connecting groove is provided at the connecting end of the fixing portion and the clamping portion, a first connecting piece is provided in the connecting groove, a second connecting piece is provided at the connecting end of the protective cover and the fixing portion, and the first connecting piece and the second connecting piece can be buckled and connected.

[0009] Furthermore, an undercut is provided on one end of the limiting spacer, and a corresponding clamping hole is provided on the protective cover or the clamping portion. When the fixing portion is buckled and connected with the protective cover, the undercut is buckled and connected with the clamping hole.

[0010] Furthermore, a fixing hole is provided on an end surface of the fixing portion away from the clamping portion, and the fixing hole is used to cooperate with a fastener to fix the copper busbar fixing structure.

[0011] Furthermore, limiting blocks are provided on both sides of one end of the fixing portion away from the clamping portion, and the limiting blocks are used to cooperate with the limiting groove to limit the movement of the fixing portion.

[0012] In order to achieve the above-mentioned purpose of the utility model, the second aspect of the utility model proposes a battery pack, including the copper bar fixing structure described in any one of the above items, and also including a box body, a battery cell stack arranged in the box body, a liquid cooling plate, a pressure plate and a copper bar, the battery cell stack body is arranged in contact along the length direction of the liquid cooling plate, the copper bar fixing structure integrated with at least one of the copper bars is arranged along the length direction of the liquid cooling plate and / or the box body, the pressure plate covers the top of the battery cell stack body, and the copper bar fixing structure is fixedly connected to the pressure plate.

[0013] Furthermore, the liquid cooling plate and / or the box body are provided with a plurality of limit grooves along the length direction near one end of the pressure plate. When the copper busbar fixing structure is installed, the limit blocks respectively cooperate with and abut the limit grooves on the liquid cooling plates on both sides or the liquid cooling plates and the box body.

[0014] In order to achieve the above-mentioned purpose of the utility model, the third aspect of the utility model provides an electrical device, including the battery pack described in any one of the above items.

[0015] The utility model has at least the following beneficial effects:

[0016] Compared with the prior art, the copper busbar fixing structure of the present invention comprises a fixing base and a protective cover; the fixing base comprises a fixing portion and a clamping portion, the clamping portion has a first end and a second end opposite to the first end along the length direction, the fixing portion and the clamping portion are integrally connected through the first end, the second end is openably connected to one end of the protective cover, and the fixing portion and the other end of the protective cover are snap-fitted; this technical solution can effectively fix the copper busbar in the battery pack through the clamping portion and the fixing portion of the fixing base, and since the second end of the clamping portion is openably connected to one end of the protective cover, the fixing portion and the protective cover are snap-fitted. The other end of the cover can be snap-fitted, so that when installing the copper busbar, the protective cover can be opened more conveniently and the copper busbar can be placed in the clamping part of the fixing base, which is convenient for the installation and maintenance of the copper busbar; since the fixing part and the clamping part of the fixing base are integrally connected through the first end, when the copper busbar fixing structure is installed, the clamping part cooperates with the protective cover to clamp the copper busbar, and the clamping part can be placed in a narrow and deep space first, and then the copper busbar fixing structure can be fixed by the fixing part, without having to reserve additional operating space for fixing or disassembling the copper busbar fixing structure, which facilitates the disassembly and assembly of the fixing structure, and thus can efficiently fix and maintain the copper busbar.

[0017] Compared with the prior art, a battery pack according to an embodiment of the present application includes the above-mentioned copper busbar fixing structure. It is understood that the battery pack according to the present application can include all the technical features and technical effects of the above-mentioned copper busbar fixing structure, which will not be described in detail here.

[0018] Compared with the prior art, the electric device of the present application includes the above-mentioned battery pack. It is understandable that the electric device of the present application can include all the technical features and technical effects of the above-mentioned battery pack, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the copper busbar fixing seat provided by Chinese utility model patent CN220710787U;

[0020] Figure 2 This is a schematic diagram of the closed state of the copper busbar fixing structure provided by one embodiment of the present utility model;

[0021] Figure 3 This is a schematic diagram of the copper busbar fixing structure provided in an embodiment of the present invention in an open state;

[0022] Figure 4 This is a front view of a copper busbar fixing structure provided by an embodiment of the present invention;

[0023] Figure 5 yes Figure 4 An enlarged schematic diagram of point I in the middle;

[0024] Figure 6 yes Figure 5 Sectional view of the AA plane;

[0025] Figure 7 This is a schematic diagram of a battery pack provided by an embodiment of the present utility model;

[0026] Figure 8 This is a schematic diagram of a battery pack provided by another embodiment of the present invention;

[0027] Figure 9 This is a schematic diagram of a battery pack explosion provided by an embodiment of the present invention.

[0028] in:

[0029] 1-Copper busbar fixing structure; 10-Fixer; 100-Fixer; 101-Clamping portion; 1010-First end; 1011-Second end; 1000-Connecting groove; 1001-Limiting block; 1002-First connecting member; 1003-Fixer hole; 1012-Limiting spacer; 1013-Mounting groove; 1014-Undercut; 11-Protective cover; 110-Transition arc segment; 111-Bending groove; 112-Clamping hole; 113-Second connecting member;

[0030] 2-battery pack; 20-box; 21-pressing plate; 22-liquid cooling plate; 220-limiting groove; 23-copper busbar; 24-cell stack.

[0031] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0032] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like, indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0034] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections, direct connections, or indirect connections through an intermediate medium; they may refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0035] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0036] A battery pack is a single unit assembled from multiple battery modules, used to store and deliver electrical energy. A battery pack is a higher-level component in a battery system, typically consisting of a structural system, battery modules, a thermal management system, an electrical system, and a battery management system. The stack of cells between battery modules relies on copper busbars to form a high-voltage circuit. These busbars are primarily used to connect the individual battery modules within the battery pack, playing a crucial role in current transmission and electrical device connectivity within the overall circuit. With the continuous development of electronics, electric vehicles, and other fields, the demand for smaller and more compact devices is increasing. Compact battery packs can better adapt to these space constraints. Within limited space, optimizing the battery pack's structure and layout can improve battery energy density. A compact design reduces voids and redundant structures within the battery pack, freeing up more space for battery modules, thereby increasing battery capacity and battery life. Furthermore, a compact structure reduces assembly difficulty and time, improving production efficiency, and ultimately reducing material usage and production costs.

[0037] The inventors found that in the actual production of battery packs, as the space utilization rate within the battery pack increases, the space between the components within the battery pack becomes increasingly narrow, such as the distance between the battery cell stack and the box, the distance between the battery cell stacks, etc. At the same time, since the battery cell stack is formed by stacking single battery cells, it has a certain height. Therefore, the space for installing the copper busbar becomes very narrow in width. It is usually necessary to fix the long copper busbar on its side, which is inconvenient to operate in depth. It is difficult to fix the existing copper busbar fixing structure by plugging it in from the bottom, and it is inconvenient to disassemble and assemble the copper busbar fixing structure.

[0038] In order to solve the problem that the above-mentioned copper busbar fixing structure is inconvenient to disassemble and assemble in the compact space of the battery pack, an embodiment of the present application provides a copper busbar fixing structure, which can effectively fix the copper busbar in the battery pack through the clamping part and the fixing part of the fixing base. Since the second end of the clamping part can be opened and closed and connected to one end of the protective cover, and the fixing part can be buckled and connected to the other end of the protective cover, when installing the copper busbar, the protective cover can be opened more conveniently and the copper busbar can be placed in the clamping part of the fixing base, which is convenient for the installation and maintenance of the copper busbar; since the fixing part and the clamping part of the fixing base are integrally connected through the first end, when the copper busbar fixing structure is installed, the clamping part cooperates with the protective cover to clamp the copper busbar, and the clamping part can be placed in a narrow and deep space first, and then the copper busbar fixing structure can be fixed by the fixing part. There is no need to reserve additional operating space for fixing or disassembling the copper busbar fixing structure, which is convenient for disassembling and assembling the fixing structure, and thus can efficiently fix and maintain the copper busbar, and can effectively solve the technical problem that the copper busbar fixing device in the battery pack in the prior art is not convenient for disassembly and assembly. The copper busbar fixing structure in the embodiment of the present application will be described in detail below with reference to the accompanying drawings.

[0039] Reference Figures 2 to 9 An embodiment of the present invention provides a copper busbar fixing structure 1, comprising: a fixing base 10 and a protective cover 11; the fixing base 10 comprises a fixing portion 100 and a clamping portion 101, the clamping portion 101 having a first end 1010 and a second end 1011 opposite to the first end 1010 along the length direction, the fixing portion 100 and the clamping portion 101 are integrally connected through the first end 1010, the second end 1011 is openably connected to one end of the protective cover 11, and the fixing portion 100 and the other end of the protective cover 11 are buckled and connected.

[0040] In this embodiment, the fixing portion 100 serves as the base portion of the copper busbar fixing structure 1 and is used to be fixedly connected to other components in the battery pack 2. For example, in the battery pack 2, when the long copper busbar 23 is arranged along the gap between the lower box body 20 and the battery cell stack 24, the copper busbar fixing structure 1 can extend into the gap after clamping the copper busbar 23, and then be fixedly connected to the fixing portion 100 through a pressure plate 21 or a pressure strip or a bracket and other structures. The connection can be made by bolts, and this application does not impose specific restrictions. The clamping portion 101 is used to cooperate with the protective cover 11 to clamp the copper busbar 23 to ensure the position of the copper busbar 23 in the battery pack 2 and the stability of the electrical connection. In addition to being used to cooperate with the clamping portion 101 to clamp the copper busbar 23, the protective cover 11 can also provide additional protection and support to prevent the copper busbar 23 from being disturbed and damaged by the external environment.

[0041] In the above embodiment, the clamping portion 101 has a first end 1010 and an oppositely arranged second end 1011 along the length direction. The fixing portion 100 is integrally connected to the clamping portion 101 through the first end 1010 to form an integral fixing base 10 structure, which enhances the stability and strength of the structure and is conducive to the stable clamping of the copper busbar 23. The second end 1011 is connected to one end of the protective cover 11 in an openable and closable manner and the fixing portion 100 is connected to the other end of the protective cover 11 in a snap-fitting manner, allowing the protective cover 11 to be opened when fixing the copper busbar 23 to facilitate the installation and maintenance of the copper busbar 23. When the protective cover 11 is closed, the fixing portion 100 is connected to the protective cover 11 in a snap-fitting manner to ensure that the protective cover 11 is stably fixed on the fixing base 10. The fixing base 10 and the protective cover 11 are arranged in coordination with each other to make the entire copper busbar fixing structure 1 compact and applicable to a compact battery pack 2, and easy to disassemble and assemble.

[0042] In actual use, the clamping portion 101 can hold multiple copper bars 23. This application does not impose any specific restrictions. The copper bars 23 can be installed in the clamping portion 101 in a horizontal, vertical or irregular arrangement according to the compact layout space of the battery pack 2. It is very suitable for installing the copper bars 23 in a narrow and deep space, and the fixing portion 100 and the protective cover 11 are connected in a detachable manner, which can effectively fix the copper bars 23 inside the battery pack 2. Specifically, when connecting, a buckle or a slot can be set on the protective cover 11, and a slot, a hole 112 or a buckle can be set on the fixing portion 100, and the buckle is connected to the slot through the buckle. Compared with the prior art, the copper busbar fixing structure 1 of the present application can be installed in a horizontal, vertical or irregular arrangement structure in the clamping portion 101 according to the specific size of the narrow and deep space in the compact layout of the battery pack 2. Since the second end 1011 of the clamping portion 101 can be opened and closed with one end of the protective cover 11, and the fixing portion 100 can be snapped together with the other end of the protective cover 11, when installing the copper busbar 23, the protective cover 11 can be opened conveniently and the copper busbar 23 can be placed in the clamping portion 101 of the fixing seat 10, which is convenient. Installation and maintenance of the copper busbar 23; since the fixing portion 100 of the fixing seat 10 is integrally connected to the clamping portion 101 through the first end 1010, when the copper busbar fixing structure 1 is installed, the clamping portion 101 cooperates with the protective cover 11 to clamp the copper busbar 23, the clamping portion 101 can be placed in a narrow and deep space first, and then the copper busbar fixing structure 1 can be fixed through the fixing portion 100. There is no need to reserve additional operating space for fixing or disassembling the copper busbar fixing structure 1, which facilitates the disassembly and assembly of the fixing structure, and thus can efficiently fix and maintain the copper busbar 23.

[0043] See also Figures 2 to 9 The second end 1011 and the connected end of the protective cover 11 are both provided with a transition arc segment 110 with a gradually decreasing thickness, and the transition arc segments 110 are connected to form a bending groove 111.

[0044] In the above embodiment, the connecting end of the second end 1011 and the protective cover 11 refers to the connecting end that can be opened and closed between the second end 1011 and the protective cover 11. The clamping portion 101 and the protective cover 11 are fixedly connected by the bending groove 111, so that the protective cover 11 can be opened and closed, ensuring that the copper busbar 23 can be installed simply and quickly when it is installed. At the same time, since the portion forming the bending groove 111 is a transition arc segment 110 whose thickness gradually increases from the connecting end of the bending groove 111 to the outside, the structure can rotate, ensuring that the protective cover 11 can be opened or closed. At the same time, the thickness of the transition arc segment 110 gradually increases from the connecting end of the bending groove 111 to the outside, which is conducive to reducing the connection rigidity between the fixing base 10 and the protective cover 11, and is conducive to opening or closing the protective cover 11.

[0045] See also Figures 2 to 9A limiting spacer 1012 is provided on the inner side of the clamping portion 101 or the protective cover 11 along the length direction, and an installation groove 1013 is formed between the limiting spacer 1012 and the limiting spacer 1012 and / or between the limiting spacer 1012 and the fixing portion 100 for placing the copper busbar 23.

[0046] In the above embodiment, the mounting groove 1013 is mainly used to install the copper busbar 23, and is arranged along the length direction, which is conducive to installing the copper busbar 23 along the depth direction in a narrow and deep space. The limit block 1001 is used to support and position the copper busbar 23, ensuring that the position and spacing of the copper busbar 23 in the clamping portion 101 are accurate, and preventing it from moving under vibration or impact. In addition, the limit block 1001 can separate a plurality of mounting grooves 1013 in the clamping portion 101 for installing and fixing a plurality of copper busbars 23. It is understandable that the mounting groove 1013 is used to install the space of the copper busbar 23, and its shape and size match the copper busbar 23 to ensure that the copper busbar 23 can be stably placed in the groove.

[0047] See also Figures 2 to 9 A connecting groove 1000 is provided at the connecting end of the fixing portion 100 and the clamping portion 101, a first connecting member 1002 is provided in the connecting groove 1000, and a second connecting member 113 is provided at the connecting end of the protective cover 11 and the fixing portion 100, and the first connecting member 1002 and the second connecting member 113 can be buckled and connected.

[0048] In the above embodiment, the fixing portion 100 is used to fix the entire fixing base 10 when connected to an external component; the connecting groove 1000 provided in the fixing portion 100 is used to set various connecting structures in the groove to connect with other components and provide the space required for their movement, such as setting a first connecting member 1002; a connecting block for cooperating with the connecting groove 1000 is provided on the protective cover 11, and the connecting block is used to set a structure that matches the connecting structure in the connecting groove 1000, such as the second connecting member 113. Specifically, when the first connecting member 1002 is connected to the second connecting member 113, it can be a snap fit with the card hole 112.

[0049] See also Figures 2 to 9 A buckle 1014 is provided on one end of the limiting spacer 1012, and a corresponding card hole 112 is provided on the protective cover 11 or the clamping portion 101. When the fixing portion 100 is buckled and connected with the protective cover 11, the buckle 1014 is buckled and connected with the card hole 112.

[0050] In the above embodiment, the arrangement of the undercut 1014 and the latch hole 112 enables a stable connection to be formed between the fixing portion 100 and the protective cover 11, thereby preventing accidental separation of the fixing base 10 and the protective cover 11 or deformation of the protective cover 11 causing the copper busbar 23 to detach from the mounting groove 1013, thereby ensuring the stability and reliability of the copper busbar fixing structure 1. In actual use, the limiting spacer 1012 can be set on the inner side of the clamping part 101, or on the inner side of the protective cover 11. When it is set on the inner side of the clamping part 101, a corresponding clamping hole 112 is opened on the protective cover 11, and its position corresponds to the position of the undercut 1014 on the fixing seat 10. After the copper busbar 23 is snapped into place, the undercut 1014 on the fixing seat 10 is snapped with the clamping hole 112 on the protective cover 11 to achieve the purpose of limiting and fastening the copper busbar 23; when it is set on the inner side of the protective cover 11, a corresponding clamping hole 112 is opened on the clamping part 101, further ensuring that the copper busbar 23 can be firmly clamped in the installation groove 1013. The overall specifications of the installation groove 1013 can be designed according to the specific structure and size of the copper busbar 23; the limiting spacer 1012 and the undercut 1014 determine their specifications and sizes according to the number of copper busbars 23 to be fixed, so as to meet the needs of actual conditions.

[0051] See also Figures 2 to 9 The end surface of the fixing portion 100 away from the clamping portion 101 is provided with a fixing hole 1003 , and the fixing hole 1003 is used to cooperate with a fastener to fix the copper busbar fixing structure 1 .

[0052] In the above embodiment, the fixing holes 1003 are used to cooperate with fasteners to secure the copper busbar fixing structure 1. These fasteners can be nuts embedded during the injection molding of the copper busbar fixing structure 1, and the fasteners can be bolts. The copper busbar fixing structure 1 can be fixed using bolts and threads. For example, the copper busbar fixing structure 1 can be fixed to the pressure plate 21 of the battery pack 2 using bolts and nuts.

[0053] See also Figures 2 to 9 Limiting blocks 1001 are provided on both sides of one end of the fixing portion 100 away from the clamping portion 101 , and the limiting blocks 1001 are used to cooperate with the limiting groove 220 to limit the movement of the fixing portion 100 .

[0054] In the above embodiment, the limiting block 1001 cooperates with the limiting groove 220 to install and stabilize the fixing base 10, preventing the fixing base 10 and the protective cover 11 from moving as a whole. For example, when the copper busbar fixing structure 1 is installed and fixed, the limiting groove 220 can be opened on the box 20 and / or the liquid cooling plate 22 of the battery pack 2. The limiting block 1001 cooperates with the limiting groove 220 to engage with the limiting groove, which can limit the horizontal movement of the fixing base 10. This is beneficial for maintaining the copper busbar fixing structure 1 stable and preventing movement during the tightening of the bolts and nuts when installing the copper busbar fixing structure 1.

[0055] Furthermore, the fixing base 10 and the protective cover 11 are both made of a tough material, which can be an insulating engineering plastic, such as an elastomer, polyolefin, polyamide, or ABS resin (Acrylonitrile Butadiene Styrene: a terpolymer of three monomers: acrylonitrile, butadiene, and styrene). This ensures that after the fixing base 10 and the protective cover 11 fix the copper busbar 23, the overall structure can support the copper busbar 23 to be fixed, and at the same time ensures that the connection end of the fixing base 10 and the protective cover 11 can be movable, which is beneficial to the fixation of the copper busbar 23 and the opening or closing of the protective cover 11.

[0056] In the present application, the fixing base 10 is integrally formed with the protective cover 11. The protective cover 11 will not be lost, and is convenient for use with the fixing base 10, and the production cycle is short, which is conducive to mass production.

[0057] See also Figures 2 to 9 In one embodiment, the present application also provides a battery pack 2, comprising the copper bar fixing structure 1 described in any one of the above items, and further comprising a box body 20, a battery cell stack 24 arranged in the box body 20, a liquid cooling plate 22, a pressure plate 21 and a copper bar 23, wherein the battery cell stack 24 is arranged in contact with each other along the length direction of the liquid cooling plate 22, and the copper bar fixing structure 1 integrated with at least one copper bar 23 is arranged along the length direction of the liquid cooling plate 22 and / or the box body 20, the pressure plate 21 covers the top of the battery cell stack 24, and the copper bar fixing structure 1 is fixedly connected to the pressure plate 21.

[0058] In this embodiment, the box body 20 is used to accommodate the internal structure of the battery pack 2, such as the cell stack 24, the liquid cooling plate 22, the pressure plate 21 and the copper busbar 23. The cell stack 24 is composed of a plurality of cells connected in series. It is the core component of the battery pack 2 and is responsible for storing and providing electrical energy. The cell stack 24 is arranged in contact along the length direction of the liquid cooling plate 22 to ensure the heat dissipation effect between the cell stacks 24. The liquid cooling plate 22 is arranged around the cell stack 24 to absorb and disperse the heat generated by the cell stack 24 and maintain the stability of the internal temperature of the battery pack 2. The liquid cooling plate 22 realizes the heat dissipation function through the internal circulation of the coolant. This application does not make specific settings for the specific form of the liquid cooling plate 22. For example, the liquid cooling plate 22 can also integrate the exhaust function. The pressure plate 21 is used to prevent the cell stack 24 from displacement to ensure its stability.

[0059] It should be noted that in the above embodiment, the liquid cooling plates 22 are arranged in sequence to form a receiving cavity for accommodating the battery cell stack 24. When the liquid cooling plates 22 are set, the copper busbars 23 can be arranged between the liquid cooling plates 22 and / or between the liquid cooling plates 22 and the box body 20. When the copper busbar fixing structure 1 of the present application is actually used, the copper busbar 23 is first clamped on the clamping portion 101, and then the copper busbar fixing structure 1 is extended into the gap between the liquid cooling plates 22 and / or between the liquid cooling plates 22 and the box body 20. Finally, the pressure plate 21 is fixedly connected to the copper busbar fixing structure 1 to achieve the installation and fixation of the copper busbar fixing structure 1.

[0060] See also Figures 2 to 9 In one embodiment, the liquid cooling plate 22 and / or the box body 20 are provided with a plurality of limiting grooves 220 along the length direction near one end of the pressure plate 21. When the copper busbar fixing structure 1 is installed, the limiting blocks 1001 respectively cooperate with and abut against the limiting grooves 220 on the liquid cooling plates 22 on both sides or the liquid cooling plates 22 and the box body 20.

[0061] In this embodiment, the limiting groove 220 is provided on the liquid cooling plate 22 and / or the box body 20 , and the limiting groove 220 cooperates with the limiting block 1001 to install and stabilize the fixing base 10 to prevent the fixing base 10 and the protective cover 11 from moving as a whole.

[0062] In one embodiment, the present application further provides an electrical device comprising any of the above-described battery packs 2. Therefore, the electrical device provided in this embodiment of the present application has the technical effects of the technical solutions of the battery packs 2 in any of the above-described embodiments, and the explanations of the structures and terms that are identical or corresponding to those in the above-described embodiments are not further elaborated here.

[0063] In the above embodiments, it is understood that the electrical device may be a vehicle, a portable device, a ship, a spacecraft, an electric tool, etc. The technical solutions described in the embodiments of the present application are applicable to all electrical devices including those using a battery system.

[0064] The copper busbar 23 installation and fixing structure of the present application is achieved by fixing the copper busbar 23 in the following manner:

[0065] This embodiment is suitable for installing the copper busbar 23 in a narrow, deep, and compact space within the battery pack 2. The narrow, deep, and compact space refers to the gap between the liquid cooling plates 22 and / or between the liquid cooling plates 22 and the box 20. The above gap is used to arrange the copper busbar 23. When arranging the copper busbar 23, the following steps are included:

[0066] S1: Open the protective cover 11 and install the copper busbar 23 to be fixed in the corresponding multiple installation grooves 1013; when closing, rotate the protective cover 11 in turn, snap-fit ​​the undercut 1014 with the card hole 112, and preliminarily fix the copper busbar 23 in the installation groove 1013 through the mutual cooperation of the first connecting piece 1002 in the connecting groove 1000 in the fixing part 100 and the second connecting piece 113 and the bending groove 111 in the protective cover 11; at this time, since the copper busbar 23 has been installed in the installation groove 1013, the copper busbar 23, the fixing base 10 and the protective cover 11 form an assembly as a whole.

[0067] S2: Place the component in the above S1 in the gap with the retractable connection end of the fixing part 100 and the protective cover 11 facing the bottom of the gap; when placing, the limit block 1001 on the fixing part 100 cooperates with the limit groove 220 on the liquid cooling plate 22 to pre-fix the component.

[0068] S3: Cover the pressing plate 21 on the battery cell stack 24 and fix it, and fasten it with the nuts on the fixing part 100 through the bolts passing through the pressing plate 21 to complete the fixation of the copper busbar 23.

[0069] It should be noted that, when applied to the battery pack 2, the present application does not impose any specific restrictions on the arrangement space of the copper busbar 23. The copper busbar 23 can also be arranged in the gap between any module and the box 20, between the bracket and the box 20, and between the bracket and the liquid cooling plate 22. The copper busbar 23 can be fixed using the copper busbar fixing structure 1 of the present application.

[0070] In summary, compared with the prior art, the copper busbar fixing structure 1 of the present invention includes a fixing base 10 and a protective cover 11; the fixing base 10 includes a fixing portion 100 and a clamping portion 101, the clamping portion 101 has a first end 1010 and a second end 1011 opposite to the first end 1010 along the length direction, the fixing portion 100 and the clamping portion 101 are integrally connected through the first end 1010, the second end 1011 and one end of the protective cover 11 can be opened and closed, and the fixing portion 100 and the other end of the protective cover 11 can be buckled and connected; this technical solution can effectively fix the copper busbar 23 in the battery pack 2 through the clamping portion 101 of the fixing base 10 and the fixing portion 100, because the second end 1011 of the clamping portion 101 and the protective cover 11 are connected One end can be opened and closed, and the other end of the fixing part 100 and the protective cover 11 can be buckled and connected, so that when installing the copper busbar 23, the protective cover 11 can be conveniently opened and the copper busbar 23 can be placed in the clamping part 101 of the fixing base 10, which is convenient for the installation and maintenance of the copper busbar 23; since the fixing part 100 and the clamping part 101 of the fixing base 10 are integrally connected through the first end 1010, when the copper busbar fixing structure 1 is installed, the clamping part 101 cooperates with the protective cover 11 to clamp the copper busbar 23, and then the clamping part 101 can be placed in a narrow and deep space first, and then the copper busbar fixing structure 1 can be fixed by the fixing part 100. There is no need to reserve additional operating space for fixing or disassembling the copper busbar fixing structure 1, which facilitates the disassembly and assembly of the fixing structure, and thus can efficiently fix and maintain the copper busbar 23.

[0071] Compared with the prior art, a battery pack 2 of an embodiment of the present application includes the above-mentioned copper busbar fixing structure 1. It is understandable that the battery pack 2 of the present application can include all the technical features and technical effects of the above-mentioned copper busbar fixing structure 1, which will not be repeated here.

[0072] Compared with the prior art, the electric device of the present application includes the above-mentioned battery pack 2. It is understandable that the electric device of the present application can include all the technical features and technical effects of the above-mentioned battery pack 2, which will not be repeated here.

[0073] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A copper busbar fixing structure, characterized in that: It includes a fixing seat and a protective cover; the fixing seat includes a fixing portion and a clamping portion, the clamping portion has a first end and a second end opposite to the first end along the length direction, the fixing portion and the clamping portion are integrally connected through the first end, the second end can be opened and closed with one end of the protective cover, and the fixing portion can be snap-fitted with the other end of the protective cover.

2. The copper busbar fixing structure according to claim 1, characterized in that: The second end and the connected end of the protective cover are both provided with transition arc segments with gradually decreasing thickness, and the transition arc segments are connected to form a bending groove.

3. The copper busbar fixing structure according to claim 1, characterized in that: A limiting spacer is provided on the inner side of the clamping portion or the protective cover along the length direction, and a mounting groove is formed between the limiting spacers and / or between the limiting spacer and the fixing portion for placing the copper busbar.

4. The copper busbar fixing structure according to claim 3, characterized in that: A connecting groove is provided at the connecting end of the fixing portion and the clamping portion, a first connecting piece is provided in the connecting groove, a second connecting piece is provided at the connecting end of the protective cover and the fixing portion, and the first connecting piece and the second connecting piece can be buckled and connected.

5. The copper busbar fixing structure according to claim 3, characterized in that: An undercut is provided on one end of the limiting spacer, and a corresponding clamping hole is provided on the protective cover or the clamping portion. When the fixing portion is buckled and connected with the protective cover, the undercut is buckled and connected with the clamping hole.

6. The copper busbar fixing structure according to claim 1, characterized in that: A fixing hole is provided on an end surface of the fixing portion away from the clamping portion, and the fixing hole is used to cooperate with a fastener to fix the copper busbar fixing structure.

7. The copper busbar fixing structure according to claim 1, characterized in that: Limiting blocks are provided on both sides of one end of the fixing portion away from the clamping portion, and the limiting blocks are used to cooperate with the limiting groove to limit the movement of the fixing portion.

8. A battery pack, characterized in that: The copper busbar fixing structure comprises the copper busbar fixing structure according to any one of claims 1 to 7, and further comprises a box, a battery cell stack arranged in the box, a liquid cooling plate, a pressure plate and a copper busbar, wherein the battery cell stack is arranged in contact with each other along the length direction of the liquid cooling plate, and the copper busbar fixing structure integrating at least one copper busbar is arranged along the length direction of the liquid cooling plate and / or the box, the pressure plate covers the top of the battery cell stack, and the copper busbar fixing structure is fixedly connected to the pressure plate.

9. The battery pack according to claim 8, characterized in that: The liquid cooling plate and / or the box body are provided with a plurality of limit grooves along the length direction near one end of the pressure plate. When the copper busbar fixing structure is installed, the limit blocks respectively cooperate with and abut against the limit grooves on the liquid cooling plates on both sides or the liquid cooling plates and the box body.

10. An electrical device, characterized in that: Comprising the battery pack according to any one of claims 8 to 9.

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