Battery pack

Abstract

The utility model relates to the technical field of batteries, and discloses a battery pack which comprises a shell, the shell comprises a base shell with an opening and a non-metal front cover for sealing the opening, and a mounting hole penetrating through the non-metal front cover is formed in the non-metal front cover; the reinforcing plate is fixedly connected between the non-metal front cover and the base shell and is vertical to the non-metal front cover; the battery unit comprises a battery module and a circuit board which are arranged in the shell, and the battery module is connected with the circuit board through an electrode connecting piece; and the electrical connection assembly comprises a conductive structure, one end of the conductive structure is connected to the circuit board, the other end of the conductive structure penetrates through the mounting hole and extends out of the shell, and a load can be electrically connected with the battery module through the conductive structure. The utility model has the advantages that the lightweight design is realized, the manufacturing cost is low, and the assembly efficiency is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially relates to a battery pack. BACKGROUND

[0002] The conventional battery pack design usually adopts sheet metal parts as the shell front cover material to ensure the structural strength of the battery pack during lifting and other operations. However, although this design effectively improves the overall mechanical strength of the battery pack, it also brings several challenges and deficiencies. First, to prevent short circuit risk caused by shell conduction, a wiring terminal with a plastic shell needs to be added to the metal front cover to safely achieve electrical connection between the battery pack and external electrical equipment. This not only increases the cost of additional components, but also significantly increases the complexity of circuit assembly as the wiring terminal needs to be connected to the internal circuit board and the electrodes of the battery module through wires. In addition, using metal as the front cover inevitably increases the overall weight of the battery pack, further increasing production costs. SUMMARY

[0003] To address the above deficiencies in the prior art, the technical problem to be solved by the utility model is to provide a lightweight battery pack with low manufacturing cost and high assembly efficiency.

[0004] The utility model solves its technical problem by adopting the technical scheme of a battery pack, comprising:

[0005] A shell comprising a base shell with an opening and a non-metallic front cover closing the opening, and the non-metallic front cover is provided with a mounting hole penetrating through itself;

[0006] A reinforcing plate fixedly connected between the non-metallic front cover and the base shell and perpendicular to the non-metallic front cover;

[0007] A battery unit comprising a battery module and a circuit board arranged in the shell, and the battery module is connected to the circuit board through an electrode connecting piece;

[0008] An electrical connection assembly comprising a conductive structure, one end of the conductive structure is connected to the circuit board, the other end of the conductive structure extends out of the shell through the mounting hole, and a load can form an electrical connection with the battery module through the conductive structure.

[0009] Further, the non-metal front cover is provided with a fixing groove, which is recessed inward along the outer wall of the non-metal front cover and is in line with the mounting hole, and the electric connection assembly comprises a conductive fastening structure, one end of which is clamped in the fixing groove and the other end of which is rotatably provided on one end of the conductive structure outside the shell, and the connecting line under load can be fixed on the conductive structure through the conductive fastening structure.

[0010] Further, the conductive fastening structure comprises a fixing member and a connecting member, the fixing member is clamped in the fixing groove, and the connecting member is rotatably provided in sequence through the conductive structure and the fixing member, and the connecting member and the conductive structure have a fixed gap therebetween; when the connecting member is rotated, the size of the fixed gap can be adjusted.

[0011] Further, the fixing groove comprises a first accommodating cavity and a second accommodating cavity which are in communication with each other, the diameter of the first accommodating cavity is greater than that of the second accommodating cavity, and the fixing member is clamped in the first accommodating cavity, and the connecting member can extend into the second accommodating cavity after passing through the fixing member.

[0012] Further, the conductive structure comprises a first connecting part and a second connecting part, the first connecting part is connected with the circuit board, the second connecting part extends out of the shell and is arranged opposite to the fixing groove, and a bending part is arranged between the first connecting part and the second connecting part.

[0013] Further, the bending part is integrally formed with the first connecting part and the second connecting part, and the bending part cooperates with the first connecting part and the second connecting part to form a stepped shape.

[0014] Further, the non-metal front cover is provided with a first fixing hole, the second connecting part is provided with a through hole, and a fastener can pass through the first fixing hole and the through hole to fix the conductive structure on the non-metal front cover, and the second connecting part abuts against the fixing member after the conductive structure is fixed.

[0015] Further, the electrode connecting piece comprises a positive electrode connecting piece and a negative electrode connecting piece, and the electric connection assembly is provided with two groups and corresponds to the positive electrode connecting piece and the negative electrode connecting piece one by one.

[0016] Further, the circuit board is provided with a first conductive connecting seat, a second conductive connecting seat and a third conductive connecting seat, wherein the positive electrode connecting piece and the conductive structure of one group of the electric connection assembly are connected to the first conductive connecting seat, the negative electrode connecting piece is connected to the second conductive connecting seat, and the conductive structure of the other group of the electric connection assembly is connected to the third conductive connecting seat.

[0017] Further, the battery module is provided with at least two groups, two groups of the battery module are arranged side by side, and one side of the electrodes of the two groups of the battery module jointly form a support surface, the battery cell comprises a CCS assembly provided on the support surface, the CCS assembly is electrically connected with the two groups of the battery module respectively, and the positive electrode connecting piece and the negative electrode connecting piece are provided on the CCS assembly.

[0018] Further, the CCS assembly comprises an insulating support, a first bus bar and a second bus bar, the insulating support is adapted to the size of the support surface, and is provided with a first mounting area and a second mounting area, the projection of the first mounting area and the second mounting area in the direction perpendicular to the support surface is in the support surface; the first bus bar is provided in the first mounting area and is welded with the electrodes of the battery module through the first bus bar, so that a plurality of battery cells in a single battery module form a series circuit; the second bus bar is provided in the second mounting area, and the two ends of the second bus bar can be welded with the electrodes of the two groups of the battery module respectively, and the two groups of the battery module form a series circuit.

[0019] Further, the positive electrode connecting piece and the negative electrode connecting piece are provided on the side of the first mounting area close to the circuit board, the second mounting area is located on the side of the first mounting area away from the circuit board, the first mounting area has a plurality of first mounting grooves, the second mounting area is provided with a second mounting groove, and the size of the first mounting groove is adapted to the size of the first bus bar, and the size of the second mounting groove is adapted to the size of the second bus bar.

[0020] Further, the reinforcing plate is in the base shell, and the reinforcing plate is provided with a lifting part; when the shell is subjected to a lifting load, the force direction of the lifting load is perpendicular to the non-metallic front cover, and the lifting load is transmitted to the base shell through the lifting part.

[0021] Further, the base shell comprises a bottom and an upper cover which are detachably connected, and the bottom and the upper cover are respectively connected with the non-metallic front cover, wherein the bottom has a first containing groove for placing the battery module, and the height of the side wall of the first containing groove is lower than the mounting position of the CCS assembly.

[0022] Further, the upper cover has a second accommodating groove, the reinforcing plate is detachably connected with the non-metal front cover; when the non-metal front cover is clamped at the opening, the non-metal front cover cooperates with the second accommodating groove and the first accommodating groove to form an accommodating space, and the side wall of the second accommodating groove, the side wall of the first accommodating groove and the bottom edge of the reinforcing plate are in close contact and have a corresponding second fixing hole respectively, and the upper cover, the base and the reinforcing plate can be fixed by connecting fasteners in the second fixing holes.

[0023] Compared with the prior art, the utility model has at least the following beneficial effects:

[0024] 1、the utility model discloses, through setting up the casing as base shell and non-metal front cover, set up the mounting hole on non-metal front cover, and set up the reinforcing plate fixedly connected between non-metal front cover and base shell, make reinforcing plate and non-metal front cover vertical, make battery module connect through electrode connecting piece and circuit board, make electrical connection assembly include one end and circuit board connection, the other end passes through mounting hole and extends on the conductive structure outside the casing, so that the load can form electrical connection with the battery module through the conductive structure. The design changes the stress state of the non-metal front cover in the lifting state, thereby saving the additional wiring terminal on the basis of ensuring the strength of the casing, reducing the wire connection steps, significantly reducing the manufacturing cost, and at the same time, the overall weight of the battery pack is reduced, and the lightweight design is realized.

[0025] 2、the utility model discloses, through setting up the fixed groove on non-metal front cover, make fixed groove recessed along the outer wall of non-metal front cover and be on the same straight line with mounting hole, make electrical connection assembly include conductive fastening structure, and make one end of conductive fastening structure clamped in fixed groove, and the other end is rotatably arranged on one end of conductive structure located outside the casing. The design cooperates the conductive fastening structure with the conductive structure, so that the connecting wire of the external load can be conveniently and firmly fixed on the conductive structure, while simplifying the structure, avoiding the problems of looseness or poor contact, and improving the reliability of electrical connection.

[0026] 3、the utility model discloses, conductive fastening structure includes fixed part and connecting piece, fixed part is clamped in fixed groove, and connecting piece is rotatably arranged in conductive structure and fixed part in proper order, and fixed gap is formed between connecting piece and conductive structure, and the size of fixed gap can be adjusted by rotating connecting piece. The design adjusts the fixed gap, which not only can realize firm fixation of the wire, but also can adapt to different specifications of the wire, effectively improving the flexibility and compatibility of the system. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a structural schematic view of the battery pack of the utility model.

[0028] Figure 2The utility model discloses an exploded view of a battery pack.

[0029] Figure 3 The utility model discloses the structure schematic drawing of before and after assembling of base shell in the utility model.

[0030] Figure 4 The utility model discloses an exploded view of a battery pack.

[0031] Figure 5 The utility model discloses a section view of a battery pack.

[0032] Figure 6 The utility model discloses the structure schematic drawing of non -metal front cover in the utility model.

[0033] Figure 7 The utility model discloses the structure schematic drawing of reinforcing plate assembly state in the utility model.

[0034] Figure 8 The utility model discloses the structure schematic drawing of reinforcing plate in the utility model.

[0035] Figure 9 The utility model discloses a section view of a battery pack from another angle.

[0036] Figure 10 The utility model discloses the structure schematic drawing of battery unit in the utility model.

[0037] Figure 11 The utility model discloses the structure schematic drawing of CCS assembly in the utility model.

[0038] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically: 100, housing; 110, base shell; 111, base; 111a, first receiving groove; 112, top cover; 112a, second receiving groove; 112b, reinforcing rib; 112c, rectangular mounting hole; 120, non-metallic front cover; 121, mounting hole; 122, fixing groove; 122a, first receiving cavity; 122b, second receiving cavity; 123, first fixing hole; 200, reinforcing plate; 201, first reinforcing part; 202, second reinforcing part; 210, lifting part; 211, arc-shaped groove; 220, second fixing hole; 300, battery unit; 310, battery module; 311, battery cell; 320, circuit board; 321, first conductive connection seat; 322, second conductive connection... 323. Third conductive connector; 330. CCS assembly; 331. Insulating bracket; 331a. First mounting slot; 331b. Second mounting slot; 332. First busbar; 333. Second busbar; 340. Electrode connecting piece; 341. Positive electrode connecting piece; 342. Negative electrode connecting piece; 400. Electrical connection assembly; 410. Conductive structure; 411. First connecting part; 412. Second connecting part; 412a. Through hole; 413. Bending part; 420. Conductive fastening structure; 421. Fixing member; 422. Connecting member; 500. First snap-fit ​​structure; 510. First snap-fit ​​groove; 600. Second snap-fit ​​structure; 610. Snap-fit ​​edge; 620. Second snap-fit ​​groove; 700. Safety protection structure; 710. Insulating side plate; 720. Insulating baffle. Detailed Implementation

[0039] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0040] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0041] Furthermore, in this utility model, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0042] In the utility model, unless another definite provision and limitation, the terms "connect", "fix" and the like should be understood broadly, for example, "fix" can be fixed connection, also can be detachable connection, or be integrated, can be mechanical connection, also can be electrical connection, can be direct connection, also can be indirectly connected through intermediate medium, can be the intercommunication of two elements or the interaction of two elements, unless another definite limitation. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to specific circumstances.

[0043] In addition, the technical solutions of various embodiments of the utility model can be combined with each other, but it must be based on that ordinary skilled in the art can realize, when the combination of technical solutions appears mutual contradiction or cannot be realized, it should be considered that the combination of technical solutions does not exist, also not in the protection scope required by the utility model.

[0044] As Figures 1 to 11 Indicated, in the embodiment, a battery pack, comprising:

[0045] Shell 100, including the base shell 110 with opening and the nonmetallic front cover 120 closing the opening, and the nonmetallic front cover 120 is equipped with the mounting hole 121 passing through itself;

[0046] Reinforcing plate 200, fixedly connected between the nonmetallic front cover 120 and the base shell 110, and perpendicular to the nonmetallic front cover 120;

[0047] Battery cell 300, including the battery module 310 and circuit board 320 in the shell 100, and the battery module 310 is connected with circuit board 320 through electrode connecting piece 340;

[0048] Electrical connection assembly 400, including conductive structure 410, one end of conductive structure 410 is connected on circuit board 320, the other end passes through mounting hole 121 and extends outside shell 100, and load can form electrical connection with battery module 310 through conductive structure 410.The design changes the stress state of nonmetallic front cover 120 in the lifting state through the introduction of reinforcing plate 200, thereby on the basis of guaranteeing the strength of shell 100, the additional wiring terminal is saved, the wire connection step is reduced, the manufacturing cost is significantly reduced, the overall weight of battery pack is reduced, and lightweight design is realized.

[0049] Specifically, as Figures 1 to 3As shown, in the embodiment, the shell 100 comprises a base shell 110 arranged in a rectangular hollow structure with an opening, and a non-metallic front cover 120 detachably covering the opening of the base shell 110 and capable of closing the opening. Compared with the existing metallic front cover, the design of the non-metallic front cover 120 does not require additional configuration of the terminal of the plastic shell, while also reducing the weight of the shell 100. Preferably, the non-metallic front cover 120 is a plastic part, which not only has good insulation performance and lightness, but also can significantly reduce the manufacturing cost.

[0050] In the embodiment, the base shell 110 is a sheet metal, which adopts an integrated design or a split design to ensure the overall strength of the battery pack. Preferably, the base shell 110 is a split design, which comprises a base 111 and an upper cover 112 detachably connected by fasteners, and cooperates to form a rectangular hollow structure with an opening for placing the battery cells 300. This design makes the internal components of the battery pack operable by detaching the upper cover 112 during assembly or maintenance, effectively improving the convenience of assembly and maintenance of the battery cells 300.

[0051] In the embodiment, the base 111 is a rectangular frame with two open sides, which has a first receiving groove 111a for placing the battery module 310, and the height of the side wall of the first receiving groove 111a is lower than the mounting height of the CCS assembly 330. This design forms an open welding space above the base 111, which allows the welding tool to approach the welding point from multiple angles, and satisfies the welding of the CCS assembly 330 and the plurality of battery modules 310 in the same process, effectively improving the processing efficiency.

[0052] Preferably, in the embodiment, the height of the side wall of the first receiving groove 111a is lower than the mounting position of the pulling part 210. This design makes the connection point of the base 111 and the upper cover 112 below the pulling part 210, which not only avoids the influence of the use and installation of the pulling part 210, but also ensures the aesthetics of the shell 100.

[0053] In the embodiment, the upper cover 112 is a rectangular frame with two open sides, which has a second receiving groove 112a, and the height of the side wall of the second receiving groove 112a is adapted to the height of the entire shell 100. To avoid the deformation phenomenon of the horizontal plane of the upper cover 112 upward convex or downward concave during the pulling process due to the too long side wall, a plurality of reinforcing ribs 112b are arranged on the horizontal plane of the upper cover 112, and at least one reinforcing rib 112b is arranged perpendicular to the pulling direction. This design avoids the deformation of the upper cover 112 during the pulling process, effectively improving the reliability and service life of the entire battery pack.

[0054] In the embodiment, the plurality of reinforcing ribs 112b are all arc-shaped strips, and are arranged in a straight line on the upper cover 112. This design ensures that the support force formed by the reinforcing ribs 112b is uniformly distributed, and also ensures the aesthetic appearance of the upper cover 112.

[0055] In the embodiment, the horizontal panel of the upper cover 112 is provided with a first clamping structure 500 on the inner wall near one end of the non-metal front cover 120. One end of the first clamping structure 500 is inclined downward, and cooperates with the upper cover 112 to form a first clamping groove 510. The first clamping groove 510 is in plug-in cooperation with the clamping edge 610 of the non-metal front cover 120.

[0056] In the embodiment, the upper cover 112 is further provided with a rectangular mounting hole 112c near one end of the non-metal front cover 120 on both sides, which is in communication with the outside. When the battery pack is assembled, the rectangular mounting hole 112c corresponds to the two pull-up parts 210, and a hand can pass through the rectangular mounting hole 112c to extend into the pull-up part 210, so as to realize pulling up the battery pack.

[0057] In the embodiment, a connecting hole is arranged around the rectangular mounting hole 112c, which is opposite to the edge of the pull-up part 210. The pull-up part 210 can be fixed on the side wall of the upper cover 112 through a fastener. This design improves the connection strength between the pull-up part 210 and the upper cover 112, so that the pulling load can be better transmitted to the upper cover 112, and the stress on the non-metal front cover 120 is reduced.

[0058] As shown in Figures 1 to 6 In the embodiment, the non-metal front cover 120 is rectangular, and is provided with a mounting hole 121 penetrating through itself. The mounting hole 121 is used for the conductive structure 410 to extend from the inside of the shell 100 to the outside of the shell 100, so that the external load can be electrically connected with the battery module 310 through the conductive structure 410. Preferably, the mounting hole 121 is rectangular, and the width is greater than the width of the conductive structure 410, and the length is greater than the thickness of the conductive structure 410. This design enables the conductive structure 410 to pass through smoothly, ensuring the convenience of assembly of the conductive structure 410.

[0059] Preferably, in the embodiment, the mounting hole 121 is provided with two groups arranged left and right, and the two groups of mounting holes 121 have a height difference therebetween, which is used for cooperating with the different height arrangement of the two groups of conductive structures 410.

[0060] In the embodiment, the non-metal front cover 120 is further provided with a fixing groove 122, which is recessed inward along the outer wall of the non-metal front cover 120 and is in the same straight line with the mounting hole 121, and is used for accommodating the conductive fastening structure 420. Through the cooperation of the fixing groove 122 and the conductive fastening structure 420, the connecting line of the load can be stably fixed on the conductive structure 410, realizing reliable electrical connection.

[0061] In the embodiment, the fixing groove 122 comprises a first accommodating cavity 122a and a second accommodating cavity 122b which are in communication with each other, and the diameter of the first accommodating cavity 122a is larger than that of the second accommodating cavity 122b. The first accommodating cavity 122a has a hexagonal cross section for achieving clamping with the fixing member 421 and preventing the fixing member 421 from rotating with the rotation of the connecting member 422. The second accommodating cavity 122b has a cylindrical cross section for accommodating the end of the connecting member 422 passing through the fixing member 421, so that the connecting member 422 can rotate freely in the fixing member 421 without affecting the position and stability of the fixing member 421.

[0062] In the embodiment, the fixing groove 122 is provided in two groups, and each group comprises two vertically arranged and aligned fixing grooves 122. The two groups of fixing grooves 122 correspond to the two groups of mounting holes 121 one by one. One group of fixing grooves 122 is located directly below the mounting hole 121, and the other group of fixing grooves 122 is located directly above the mounting hole 121. This design makes the two groups of fixing grooves 122 and the two groups of mounting holes 121 horizontally flush, effectively improving the aesthetics of the non-metallic front cover 120.

[0063] Preferably, in the embodiment, there is a height difference between the fixing groove 122 and the first conductive connecting seat 321 or the third conductive connecting seat 323. This design can avoid interference between the fixing groove 122 and the first conductive connecting seat 321 or the third conductive connecting seat 323.

[0064] In the embodiment, the non-metallic front cover 120 is further provided with a first fixing hole 123. The fastener can pass through the first fixing hole 123 and the through hole 412a to fix the conductive structure 410 on the non-metallic front cover 120, achieving the fixation of the conductive structure 410 and ensuring the stability of the assembly of the conductive structure 410. Preferably, the first fixing hole 123 is provided with two and located close to the fixing groove 122.

[0065] In the embodiment, the non-metallic front cover 120 is further provided with a safety protection structure 700. The safety protection structure 700 comprises an insulating side plate 710 integrally arranged with the non-metallic front cover 120 and an insulating baffle 720 detachably connected with the insulating side plate 710. The insulating side plate 710 has four and is vertically arranged on the left and right sides of each group of fixing grooves 122. When the insulating baffle 720 is assembled on the insulating side plate 710, it can shield the conductive structure 410 outside the shell 100, avoiding the user from touching the conductive structure 410 when the battery pack is in the working state, effectively improving the safety of the battery pack.

[0066] Preferably, in the embodiment, the insulating side plate 710 is provided with a clamping groove, the insulating baffle 720 is provided with a clamping part, and the insulating side plate 710 and the insulating baffle 720 are clamped through the clamping groove and the clamping part. This design improves the convenience of disassembly and maintenance of the insulating baffle 720.

[0067] In the embodiment, the upper and lower sides of the non-metallic front cover 120 are also provided with a second clamping structure 600 matched with the base 111 and the upper cover 112, which includes a clamping edge 610 and a second clamping groove 620. The clamping edge 610 extends vertically along the inner side of the non-metallic front cover 120 towards the battery module 310, and forms a plug-in fit with the first clamping groove 510 of the upper cover 112. The second clamping groove 620 is U-shaped, recessed along the inner side of the non-metallic front cover 120 away from the battery module 310, and forms a plug-in fit with the base 111. This design can realize the pre-fixing of the non-metallic front cover 120 during the assembly of the shell 100, improving the convenience and accuracy of assembly.

[0068] As shown in Figures 1 to 9 Since the non-metallic front cover 120 is a plastic part, it cannot meet the strength requirements when the battery pack is pulled, so in the embodiment, a reinforcing plate 200 is also provided. The reinforcing plate 200 is a sheet metal part, which is detachably fixedly connected between the non-metallic front cover 120 and the base shell 110, and is perpendicular to the non-metallic front cover 120. This design, on the one hand, increases the connection strength of the non-metallic front cover 120 and the base shell 110, and concentrates the connection stress point of the non-metallic front cover 120 and the base shell 110 on the reinforcing plate 200, thereby reducing the strength requirement of the non-metallic front cover 120; on the other hand, the connection point of the non-metallic front cover 120 is shifted to the inner side, effectively improving the aesthetic appearance of the non-metallic front cover 120.

[0069] In the embodiment, the reinforcing plate 200 is located in the base shell 110, and the reinforcing plate 200 is provided with a pulling part 210. Since the reinforcing plate 200 is connected perpendicularly to the non-metallic front cover 120, when the shell 100 is subjected to a pulling load, the pulling load is applied perpendicularly to the non-metallic front cover 120, and the pulling load is transmitted to the base shell 110 through the pulling part 210. This design optimizes the transmission path of the pulling load, avoids the pulling load acting directly on the non-metallic front cover 120, effectively reduces the stress burden of the non-metallic front cover 120, and prolongs the service life of the non-metallic front cover 120.

[0070] In the embodiment, the reinforcing plate 200 comprises a first reinforcing part 201 and a second reinforcing part 202, and the first reinforcing part 201 and the second reinforcing part 202 are connected vertically, wherein the first reinforcing part 201 is used for connecting with the base 111 and the upper cover 112, and the second reinforcing part 202 is used for connecting with the non-metal front cover 120, so as to ensure that firm connection is formed among the upper cover 112, the base 111 and the non-metal front cover 120.

[0071] Preferably, the first reinforcing part 201 is in a trapezoidal shape and forms a guide edge arranged in an inclined manner, which can guide the assembly of the upper cover 112 and effectively improve the convenience of assembly. The second reinforcing part 202 is in a rectangular shape and is integrally formed with the first reinforcing part 201. This design not only ensures the strength of the reinforcing plate 200, but also improves the stability and reliability of the overall structure.

[0072] In the embodiment, the first reinforcing part 201 is provided with a rectangular notch, and the lifting part 210 is detachably arranged at the rectangular notch through a fastener, so as to ensure that a hand can smoothly extend into the lifting part 210. In addition, the second reinforcing part 202 is also provided with a limiting groove which forms a plug-in cooperation with the lifting part 210. When the edge of the lifting part 210 is inserted into the limiting groove, the limiting groove can limit the lifting part 210 from moving up and down. This design realizes the positioning of the installation position of the lifting part 210 and realizes the pre-fixing of the lifting part 210, and further improves the stability of the installation of the lifting part 210.

[0073] In the embodiment, the lifting part 210 has an arc-shaped groove 211 which extends along the inner wall of the reinforcing plate 200 towards the inside of the shell 100. The arc-shaped groove 211 first extends horizontally towards the inside of the shell 100, and then extends along the lifting direction, forming an arc surface which is more comfortable when a hand is lifted, so that the hand can better exert force. This design improves the experience when the user operates. Preferably, the reinforcing plate 200 is provided with two groups which are arranged left and right, so as to facilitate the user to operate with both hands, improve the convenience and comfort of the user to operate, and ensure the uniformity of force on both sides of the shell 100.

[0074] In the embodiment, when the non-metal front cover 120 is clamped into the opening of the base shell 110, the non-metal front cover 120 cooperates with the second accommodating groove 112a and the first accommodating groove 111a to form an accommodating space for placing the battery unit 300. In addition, the side wall of the second accommodating groove 112a, the side wall of the first accommodating groove 111a and the bottom edge of the reinforcing plate 200 are in abutment and respectively have a corresponding second fixing hole 220 which is connected in the second fixing hole 220 through a fastener, so as to fix the upper cover 112, the base 111 and the reinforcing plate 200. This design realizes the close connection among the non-metal front cover 120, the base 111 and the upper cover 112.

[0075] AsFigures 1 to 5 To achieve electrical connection with external loads, in the present embodiment, an electrical connection assembly 400 is provided. The electrical connection assembly 400 includes a conductive structure 410 and a conductive fastening structure 420, wherein the conductive structure 410 is connected to the circuit board 320 at one end and extends out of the housing 100 through the mounting hole 121 as part of the power transmission path for transmitting current from the internal circuit to the external load. This design ensures the continuity and reliability of power transmission, and facilitates electrical connection with external loads.

[0076] In the present embodiment, the conductive structure 410 is a copper bar, which includes a first connecting portion 411 and a second connecting portion 412 perpendicular to each other, wherein the first connecting portion 411 is connected to the circuit board 320, and the second connecting portion 412 extends out of the housing 100 and is arranged opposite to the fixing groove 122, forming a complete power transmission path, ensuring the continuity and stability of current from the internal circuit to the external load. A bending portion 413 is provided between the first connecting portion 411 and the second connecting portion 412. The design of the bending portion 413 allows the conductive structure 410 to be flexibly arranged in a limited space, reducing interference with other components and simplifying the assembly process.

[0077] Preferably, in the present embodiment, the bending portion 413 is connected perpendicularly to the first connecting portion 411 and the second connecting portion 412. This design allows a height difference between the first connecting portion 411 and the second connecting portion 412, thereby adapting to the height difference between the mounting hole 121 and the first and third conductive seats.

[0078] In the present embodiment, the bending portion 413 is integrally formed with the first connecting portion 411 and the second connecting portion 412, and the bending portion 413 cooperates with the first connecting portion 411 and the second connecting portion 412 to form a stepped shape. This design avoids weak points that may occur when connecting multiple components, enhances the mechanical strength of the overall structure, and at the same time, reduces the need for complex processes such as welding or bolting, thereby reducing manufacturing costs and assembly difficulty.

[0079] In the present embodiment, the second connecting portion 412 is provided with a through hole 412a, which is circular and coaxial with the first fixing hole 123, so that the fastener can be conveniently arranged in the through hole 412a and the first fixing hole 123 to fix the conductive structure 410 on the non-metallic front cover 120. After the conductive structure 410 is fixed, the second connecting portion 412 abuts against the fixing member 421, limiting the horizontal movement of the fixing member 421 and ensuring the stability of the fixing member 421 during rotation of the connecting member 422.

[0080] In the embodiment, when the conductive structure 410 is installed, the second connecting part 412 is first extended outside the shell 100 along the horizontal direction through the installation hole 121, and then rotated by 90° to be vertically attached to the non-metal front cover 120, and fixed by the fastener.

[0081] In the embodiment, one end of the conductive fastening structure 420 is clamped in the fixing groove 122, and the other end is rotatably penetrated on the end of the conductive structure 410 outside the shell 100, and the connecting line of the external load can be fixed on the conductive structure 410 through the conductive fastening structure 420. The design cooperates the conductive fastening structure 420 with the conductive structure 410, so that the connecting line of the external load can be conveniently and firmly fixed on the conductive structure 410, simplifying the structure, avoiding the problems of looseness or poor contact, and improving the reliability of electrical connection.

[0082] In the embodiment, the conductive fastening structure 420 includes a fixing part 421 and a connecting part 422. The fixing part 421 is clamped in the fixing groove 122, and the connecting part 422 is rotatably penetrated in sequence through the conductive structure 410 and the fixing part 421, and the connecting part 422 and the conductive structure 410 have a fixed gap. When the connecting part 422 is rotated, the size of the fixed gap can be adjusted. The design can not only achieve firm fixation of the connecting line, but also adapt to different specifications of the wire, effectively improving the flexibility and compatibility of the system.

[0083] Preferably, in the embodiment, the fixing part 421 is a hexagonal nut, and the connecting part 422 is a bolt. The fixing part 421 can be arranged in the first accommodating cavity 122a of the fixing groove 122, and the connecting part 422 can be extended into the second accommodating cavity 122b after penetrating the fixing part 421. When connected with the external load, the end of the connecting line of the external load is placed at the fixed gap, and then the connecting part 422 is rotated to compress the fixed gap until the second connecting part 412, the end of the connecting line and the connecting part 422 are in abutment, thereby realizing the fixation of the connecting line. When disassembled, the connecting part 422 is reversely rotated.

[0084] In order to realize the power supply to the external load, in the embodiment, a battery unit 300 is also provided. The battery unit 300 includes a battery module 310 arranged in the shell 100 and a circuit board 320. The circuit board 320 is located between the battery module 310 and the electrical connection assembly 400, used to manage and distribute the electrical energy of the battery module 310, and transmit to the external load through the electrical connection assembly 400.

[0085] As Figures 1 to 11As shown, in the embodiment, the battery module 310 is connected with the circuit board 320 through the electrode connecting piece 340, ensuring that the current can be transmitted efficiently and stably. The electrode connecting piece 340 includes a positive electrode connecting piece 341 and a negative electrode connecting piece 342 arranged on the CCS assembly 330, and the electrical connection assembly 400 is provided with two groups and corresponds to the positive electrode connecting piece 341 and the negative electrode connecting piece 342 one by one, forming a complete power transmission path and providing reliable electrical connection.

[0086] In the embodiment, the circuit board 320 is arranged vertically, and the first conductive connecting seat 321, the second conductive connecting seat 322 and the third conductive connecting seat 323 are arranged on the circuit board 320. The positive electrode connecting piece 341 and the conductive structure 410 of one group of electrical connection assemblies 400 are connected to the first conductive connecting seat 321, the negative electrode connecting piece 342 is connected to the second conductive connecting seat 322, and the conductive structure 410 of the other group of electrical connection assemblies 400 is connected to the third conductive connecting seat 323 and fixed by the fastener. On the one hand, by connecting the positive electrode connecting piece 341 and the negative electrode connecting piece 342 to different conductive connecting seats respectively, the design ensures the clarity and safety of the current path, avoiding short circuit or other electrical faults caused by misconnection. On the other hand, the design realizes the direct connection of the circuit board 320, the positive electrode connecting piece 341 and the conductive structure 410, compared with the connection by the terminal in the prior art, the design can reduce the arrangement of multiple wires, not only simplifying the complexity of the line layout, but also reducing the manufacturing cost.

[0087] Preferably, in the embodiment, the fastener is a screw or a bolt.

[0088] Preferably, in the embodiment, the first conductive connecting seat 321, the second conductive connecting seat 322 and the third conductive connecting seat 323 are respectively fixedly arranged on the circuit board 320 and each have a horizontal placement surface. The design ensures the flatness when the positive electrode connecting piece 341, the negative electrode connecting piece 342 and the conductive structure 410 are connected with the first conductive connecting seat 321, the second conductive connecting seat 322 and the third conductive connecting seat 323, which helps to reduce the contact resistance and avoid the problems of unstable current or heating caused by poor contact, thereby improving the reliability and efficiency of power transmission.

[0089] In the embodiment, the battery module 310 is provided with at least two groups, and the two groups of battery modules 310 are arranged side by side, and the side with electrodes of the two groups of battery modules 310 together form a support surface. The CCS assembly 330 is arranged on the support surface and electrically connected with the two groups of battery modules 310. The design realizes the series connection of at least two groups of modules by a single CCS assembly 330, effectively saving the manufacturing cost and improving the assembly efficiency.

[0090] In the embodiment, the CCS assembly 330 comprises an insulating support 331, a first busbar 332, and a second busbar 333. The insulating support 331 is adapted to the size of the support surface and is provided with a first mounting area and a second mounting area. The projections of the first mounting area and the second mounting area in the direction perpendicular to the support surface are located in the support surface. This design integrates the mounting positions of the first busbar 332 and the second busbar 333 on the insulating support 331, ensuring that the first busbar 332 and the second busbar 333 are connected to the battery module 310 in the support surface. Compared with the external copper bars in the prior art, the copper bars and their related connecting structures can be saved, and the occupation of the internal horizontal space of the battery pack is reduced.

[0091] In the embodiment, the first busbar 332 is arranged in the first mounting area and is welded to the electrodes of the battery module 310. This can form a series circuit of the plurality of battery cells 311 in the single battery module 310. The second busbar 333 is arranged in the second mounting area and is welded to the electrodes of the two groups of battery modules 310 at both ends, forming a series circuit of the two groups of battery modules 310. This design integrates the insulating support 331, the first busbar 332, and the second busbar 333 into one body, realizing integrated design. This not only saves the external copper bars and related fastening structures that need to be additionally arranged, effectively reducing the production cost, but also supports the one-time welding series connection of the plurality of battery modules 310 and the CCS assembly 330, significantly improving the assembly efficiency.

[0092] Preferably, in the embodiment, the first busbar 332 and the second busbar 333 are rectangular and are made of aluminum. This design not only has good conductivity but also meets the welding requirements and realizes lightweight design.

[0093] In the embodiment, the positive connection piece 341 and the negative connection piece 342 are arranged on the side of the first mounting area close to the circuit board 320, ensuring that the current can be efficiently and stably transmitted to each component on the circuit board 320. The second mounting area is located on the side of the first mounting area away from the circuit board 320, facilitating the welding of the first busbar 332 and the second busbar 333. The first mounting area is provided with a plurality of first mounting grooves 331a, and the second mounting area is provided with a second mounting groove 331b. The size of the first mounting groove 331a is adapted to the size of the first busbar 332, and the size of the second mounting groove 331b is adapted to the size of the second busbar 333. This design realizes quick positioning of the mounting positions of the first busbar 332 and the second busbar 333.

Claims

1. A battery pack, characterized by, The application relates to a battery shell. The battery shell comprises a shell (100), a reinforcing plate (200), a battery unit (300) and an electrical connection assembly (400). The shell (100) comprises a base shell (110) with an opening and a non-metal front cover (120) closing the opening, and the non-metal front cover (120) is provided with a mounting hole (121) penetrating the non-metal front cover (120); The reinforcing plate (200) is fixedly connected between the non-metal front cover (120) and the base shell (110) and is perpendicular to the non-metal front cover (120); The battery unit (300) comprises a battery module (310) and a circuit board (320) arranged in the shell (100), and the battery module (310) is connected with the circuit board (320) through an electrode connecting sheet (340); 2. The battery pack of claim 1, wherein, The electrical connection assembly (400) comprises a conductive structure (410), one end of the conductive structure (410) is connected to the circuit board (320), the other end of the conductive structure (410) extends out of the shell (100) through the mounting hole (121), and a load can be electrically connected with the battery module (310) through the conductive structure (410).

3. The battery pack of claim 2, wherein, The non-metal front cover (120) is further provided with a fixing groove (122), the fixing groove (122) is recessed inward along the outer wall of the non-metal front cover (120) and is in the same straight line with the mounting hole (121), the electrical connection assembly (400) comprises a conductive fastening structure (420), one end of the conductive fastening structure (420) is clamped in the fixing groove (122), the other end of the conductive fastening structure (420) is rotatably arranged on the end of the conductive structure (410) extending out of the shell (100), and a connecting line of the load can be fixed on the conductive structure (410) through the conductive fastening structure (420).

4. The battery pack of claim 3, wherein, The conductive fastening structure (420) comprises a fixing piece (421) and a connecting piece (422), the fixing piece (421) is clamped in the fixing groove (122), the connecting piece (422) is rotatably arranged in the fixing piece (421) and the conductive structure (410) in sequence, and the connecting piece (422) and the conductive structure (410) have a fixed gap; when the connecting piece (422) rotates, the size of the fixed gap can be adjusted. The fixing groove (122) comprises a first accommodating cavity (122a) and a second accommodating cavity (122b) in communication with each other, the diameter of the first accommodating cavity (122a) is larger than that of the second accommodating cavity (122b), the fixing piece (421) is clamped in the first accommodating cavity (122a), and the connecting piece (422) can extend into the second accommodating cavity (122b) after penetrating the fixing piece (421).

5. The battery pack of claim 3, wherein, The conductive structure (410) comprises a first connecting part (411) and a second connecting part (412), the first connecting part (411) is connected with the circuit board (320), the second connecting part (412) extends out of the shell (100) and is arranged opposite to the fixing groove (122), and a bending part (413) is arranged between the first connecting part (411) and the second connecting part (412).

6. The battery pack of claim 5, wherein, The bending part (413) is integrally formed with the first connecting part (411) and the second connecting part (412), and the bending part (413) cooperates with the first connecting part (411) and the second connecting part (412) to form a stepped shape.

7. The battery pack of claim 5, wherein, The non-metal front cover (120) is provided with a first fixing hole (123), the second connecting part (412) is provided with a through hole (412a), a fastener can pass through the first fixing hole (123) and the through hole (412a), and the conductive structure (410) is fixed on the non-metal front cover (120), and the second connecting part (412) abuts against the fixing part (421) after the conductive structure (410) is fixed.

8. The battery pack of claim 1, wherein, The electrode connecting piece (340) comprises a positive electrode connecting piece (341) and a negative electrode connecting piece (342), and the electrical connection assembly (400) is provided with two groups and corresponds to the positive electrode connecting piece (341) and the negative electrode connecting piece (342) one by one.

9. The battery pack of claim 8, wherein, The circuit board (320) is provided with a first conductive connecting seat (321), a second conductive connecting seat (322) and a third conductive connecting seat (323), wherein the positive electrode connecting piece (341) and the conductive structure (410) of one group of the electrical connection assembly (400) are connected to the first conductive connecting seat (321), the negative electrode connecting piece (342) is connected to the second conductive connecting seat (322), and the conductive structure (410) of the other group of the electrical connection assembly (400) is connected to the third conductive connecting seat (323).

10. The battery pack of claim 8, wherein, The battery module (310) is provided with at least two groups, two groups of the battery module (310) are arranged side by side, and the side with electrodes of the two groups jointly constitutes a supporting surface, the battery unit (300) comprises a CCS assembly (330) arranged on the supporting surface, the CCS assembly (330) is electrically connected with two groups of the battery module (310) respectively, and the positive electrode connecting piece (341) and the negative electrode connecting piece (342) are arranged on the CCS assembly (330).

11. The battery pack of claim 10, wherein, The CCS assembly (330) comprises an insulating support (331), a first busbar (332) and a second busbar (333), the insulating support (331) is adapted to the size of the support surface and is provided with a first mounting area and a second mounting area, the projection of the first mounting area and the second mounting area in the direction perpendicular to the support surface is in the support surface; the first busbar (332) is provided in the first mounting area and is welded with the electrode of the battery module (310) through the first busbar (332), so that a plurality of battery cells (311) in a single battery module (310) form a series circuit; the second busbar (333) is provided in the second mounting area, and the two ends of the second busbar (333) can be welded with the electrodes of two groups of battery modules (310) respectively, and two groups of battery modules (310) form a series circuit.

12. The battery pack of claim 11, wherein, The positive electrode connecting piece (341) and the negative electrode connecting piece (342) are provided on the side of the first mounting area close to the circuit board (320), the second mounting area is located on the side of the first mounting area away from the circuit board (320), the first mounting area has a plurality of first mounting grooves (331a), the second mounting area is provided with a second mounting groove (331b), and the size of the first mounting groove (331a) is adapted to the size of the first busbar (332), and the size of the second mounting groove (331b) is adapted to the size of the second busbar (333).

13. The battery pack of claim 10, wherein, The reinforcing plate (200) is in the base shell (110), and the reinforcing plate (200) is provided with a lifting part (210); when the shell (100) is subjected to a lifting load, the force direction of the lifting load is perpendicular to the non-metallic front cover (120), and the lifting load is transmitted to the base shell (110) through the lifting part (210).

14. The battery pack of claim 13, wherein, The base shell (110) comprises a base (111) and an upper cover (112) which are detachably connected, the base (111) and the upper cover (112) are respectively clamped with the non-metallic front cover (120), wherein the base (111) has a first containing groove (111a) for placing the battery module (310), and the height of the side wall of the first containing groove (111a) is lower than the mounting position of the CCS assembly (330).

15. The battery pack of claim 14, wherein, The upper cover (112) has a second accommodating groove (112a), the reinforcing plate (200) is detachably connected with the non-metal front cover (120); when the non-metal front cover (120) is clamped at the opening, the non-metal front cover (120) cooperates with the second accommodating groove (112a) and the first accommodating groove (111a) to form an accommodating space, and the side wall of the second accommodating groove (112a), the side wall of the first accommodating groove (111a) and the bottom edge of the reinforcing plate (200) are in close contact and have a corresponding second fixing hole (220) respectively, and the upper cover (112), the base (111) and the reinforcing plate (200) can be fixed by connecting fasteners in the second fixing hole (220).

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