Battery pack

Abstract

The invention 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 invention 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 present invention relates to the technical field of batteries, and particularly to a battery pack. Background Art

[0002] In traditional battery pack designs, sheet metal parts are usually used as the material for the front cover of the housing 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 the risk of short circuit caused by the conductivity of the housing, wiring terminals with plastic housings need to be added to the metal front cover to safely achieve the 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 because the wiring terminals need to be connected to the electrodes of the internal circuit board and the battery module through wires respectively. In addition, using a metal material as the front cover inevitably increases the overall weight of the battery pack, further driving up the production cost. Summary of the Invention

[0003] Aiming at the above deficiencies existing in the prior art, the technical problem to be solved by the present invention is to provide a lightweight battery pack with low manufacturing cost and high assembly efficiency.

[0004] The technical solution adopted by the present invention to solve its technical problem is a battery pack, comprising:

[0005] A housing, the housing includes a base shell having an opening and a non-metallic front cover closing the opening, and the non-metallic front cover is provided with an installation hole penetrating itself;

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

[0007] A battery unit, the battery unit includes a battery module and a circuit board disposed in the housing, and the battery module is connected to the circuit board through an electrode connection piece;

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

[0009] Further, a fixing groove is also provided on the non-metallic front cover. The fixing groove is recessed inward along the outer wall of the non-metallic front cover and is on the same straight line as the mounting hole. The electrical connection assembly includes a conductive fastening structure. One end of the conductive fastening structure is clamped in the fixing groove, and the other end rotatably passes through one end of the conductive structure located outside the housing. Moreover, the connecting wire of the load can be fixed to the conductive structure through the conductive fastening structure.

[0010] Further, the conductive fastening structure includes a fixing member and a connecting member. The fixing member is clamped in the fixing groove. The connecting member rotatably passes through the conductive structure and the fixing member in sequence, and there is a fixing gap between the connecting member and the conductive structure. When the connecting member rotates, the size of the fixing gap can be adjusted.

[0011] Further, the fixing groove includes a first accommodation cavity and a second accommodation cavity that communicate with each other. The diameter of the first accommodation cavity is larger than that of the second accommodation cavity. The fixing member is clamped in the first accommodation cavity, and after passing through the fixing member, the connecting member can extend into the second accommodation cavity.

[0012] Further, the conductive structure includes a first connecting portion and a second connecting portion. The first connecting portion is connected to the circuit board. The second connecting portion extends outside the housing and is arranged opposite to the fixing groove. Moreover, a bending portion is provided between the first connecting portion and the second connecting portion.

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

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

[0015] Further, the electrode connecting piece includes a positive electrode connecting piece and a negative electrode connecting piece. Moreover, two sets of the electrical connection assemblies are provided and correspond to the positive electrode connecting piece and the negative electrode connecting piece one by one.

[0016] Further, a first conductive connection seat, a second conductive connection seat, and a third conductive connection seat are provided on the circuit board. Among them, the positive electrode connecting piece and the conductive structure of one set of the electrical connection assemblies are connected to the first conductive connection seat, the negative electrode connecting piece is connected to the second conductive connection seat, and the conductive structure of the other set of the electrical connection assemblies is connected to the third conductive connection seat.

[0017] Furthermore, there are at least two sets of the battery modules, and the two sets of battery modules are arranged side by side. One side of them with electrodes together constitutes a supporting surface. The battery unit includes a CCS component disposed on the supporting surface. The CCS component is electrically connected to the two sets of battery modules respectively, and the positive connection piece and the negative connection piece are disposed on the CCS component.

[0018] Furthermore, the CCS component includes an insulating bracket, a first busbar and a second busbar. The insulating bracket is adapted to the size of the supporting surface and is provided with a first installation area and a second installation area. The projections of the first installation area and the second installation area in the direction perpendicular to the supporting surface are within the supporting surface. The first busbar is disposed in the first installation area. By welding the first busbar to the electrodes of the battery module, a series circuit can be formed among multiple battery cells in a single battery module. The second busbar is disposed in the second installation area, and both ends of the second busbar can be welded to the electrodes of the two sets of battery modules respectively, and a series circuit is formed for the two sets of battery modules.

[0019] Furthermore, the positive connection piece and the negative connection piece are disposed on one side of the first installation area close to the circuit board. The second installation area is located on one side of the first installation area far from the circuit board. The first installation area has a plurality of first installation grooves, and the second installation area is provided with second installation grooves. The first installation grooves are adapted to the size of the first busbar, and the second installation grooves are adapted to the size of the second busbar.

[0020] Furthermore, the reinforcing plate is within the base shell, and the reinforcing plate is provided with a lifting part. When the housing is subjected to a lifting load, the application 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] Furthermore, the base shell includes a detachable base and an upper cover. The base and the upper cover are respectively snap-connected to the non-metallic front cover. Among them, the base has a first receiving groove for placing the battery module, and the side wall height of the first receiving groove is lower than the installation position of the CCS component.

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

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

[0024] 1. In the present invention, by setting the housing as a base case and a non-metallic front cover, providing mounting holes on the non-metallic front cover, and providing a reinforcing plate fixedly connected between the non-metallic front cover and the base case, making the reinforcing plate perpendicular to the non-metallic front cover, connecting the battery module to the circuit board through an electrode connection piece, and making the electrical connection assembly include a conductive structure with one end connected to the circuit board and the other end extending out of the housing through the mounting hole, so that the load can form an electrical connection with the battery module through the conductive structure. This design changes the stress state of the non-metallic front cover in the lifted state, thereby saving the additionally configured wiring terminals, reducing the wire connection steps, significantly reducing the manufacturing cost, and at the same time reducing the overall weight of the battery pack, achieving a lightweight design while ensuring the strength of the housing.

[0025] 2. In the present invention, by providing a fixing groove on the non-metallic front cover, making the fixing groove recess inward along the outer wall of the non-metallic front cover and be on the same straight line as the mounting hole, making the electrical connection assembly include a conductive fastening structure, and making one end of the conductive fastening structure be clamped in the fixing groove and the other end rotatably pass through one end of the conductive structure located outside the housing. This design, through the cooperation of the conductive fastening structure and the conductive structure, enables the connection wire of the external load to be conveniently and firmly fixed on the conductive structure, simplifies the structure, and at the same time avoids problems such as loosening or poor contact, improving the reliability of the electrical connection.

[0026] 3. In the present invention, the conductive fastening structure includes a fixing member and a connecting member. The fixing member is clamped in the fixing groove, the connecting member rotatably passes through the conductive structure and the fixing member in sequence, and there is a fixing gap between the connecting member and the conductive structure. By rotating the connecting member, the size of the fixing gap can be adjusted. This design, by adjusting the fixing gap, can not only firmly fix the wire but also adapt to wires of different specifications, effectively improving the flexibility and compatibility of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic structural diagram of a battery pack according to the present invention.

[0028] Figure 2 is an exploded view of a battery pack according to the present invention.

[0029] Figure 3 These are the structural schematic diagrams of the base case before and after assembly in the present invention.

[0030] Figure 4 This is the exploded view of the partial structure of a battery pack in the present invention.

[0031] Figure 5 This is the cross-sectional view of a battery pack in the present invention.

[0032] Figure 6 These are the structural schematic diagrams of the non-metallic front cover in the present invention.

[0033] Figure 7 These are the structural schematic diagrams of the reinforcement plate in the assembled state in the present invention.

[0034] Figure 8 These are the structural schematic diagrams of the reinforcement plate in the present invention.

[0035] Figure 9 This is the cross-sectional view of a battery pack from another perspective in the present invention.

[0036] Figure 10 These are the structural schematic diagrams of the battery cell in the present invention.

[0037] Figure 11 These are the structural schematic diagrams of the CCS component in the present invention.

[0038] In all the drawings, the same reference numerals denote the same technical features, specifically: 100, housing; 110, base housing; 111, base; 111a, first receiving groove; 112, upper 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 portion; 202, second reinforcing portion; 210, lifting portion; 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 seat; 323, third conductive connection seat; 330, CCS component; 331, insulating bracket; 331a, first mounting groove; 331b, second mounting groove; 332, first bus bar; 333, second bus bar; 340, electrode connection piece; 341, positive electrode connection piece; 342, negative electrode connection piece; 400, electrical connection component; 410, conductive structure; 411, first connection portion; 412, second connection portion; 412a, through hole; 413, bending portion; 420, conductive fastening structure; 421, fixing member; 422, connecting member; 500, first clamping structure; 510, first clamping groove; 600, second clamping structure; 610, clamping edge; 620, second clamping groove; 700, safety protection structure; 710, insulating side plate; 720, insulating baffle. Detailed implementation manners

[0039] The following are specific embodiments of the present invention in combination with the drawings, and the technical solutions of the present invention will be further described, but the present invention is not limited to these embodiments.

[0040] It should be noted that all the directional indications (such as up, down, left, right, front, back,...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0041] In addition, in the present invention, descriptions such as "first", "second", "one", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0042] In the present invention, unless otherwise clearly specified and defined, terms such as "connection" and "fixation" shall be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] In addition, the technical solutions between various embodiments of the present invention can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0044] As Figures 1 to 11 shown, in this embodiment, a battery pack includes:

[0045] A housing 100, which includes a base shell 110 with an opening and a non-metallic front cover 120 that closes the opening, and the non-metallic front cover 120 is provided with a mounting hole 121 penetrating through itself;

[0046] A reinforcing plate 200, which is fixedly connected between the non-metallic front cover 120 and the base shell 110 and is perpendicular to the non-metallic front cover 120;

[0047] A battery unit 300, which includes a battery module 310 and a circuit board 320 disposed in the housing 100, and the battery module 310 is connected to the circuit board 320 through an electrode connection piece 340;

[0048] An electrical connection assembly 400, which includes a conductive structure 410. One end of the conductive structure 410 is connected to the circuit board 320, and the other end passes through the mounting hole 121 and extends out of the housing 100, and a load can form an electrical connection with the battery module 310 through the conductive structure 410. This design changes the stress state of the non-metallic front cover 120 in the lifted state by introducing the reinforcing plate 200, thereby saving the additionally configured terminal on the basis of ensuring the strength of the housing 100, reducing the wire connection steps, significantly reducing the manufacturing cost, and at the same time reducing the overall weight of the battery pack, achieving a lightweight design.

[0049] Specifically, as Figures 1 to 3As shown, in this embodiment, the housing 100 includes 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 metal front cover, the design of the non-metallic front cover 120 does not require an additional plastic housing for the terminal, and can also reduce the weight of the housing 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 this embodiment, the base shell 110 is made of sheet metal, and it adopts an integral design or a split design to ensure the overall strength of the battery pack. Preferably, the base shell 110 is of a split design, which includes a base 111 and an upper cover 112 detachably connected by fasteners. The two cooperate to form a rectangular hollow structure with an opening for placing the battery unit 300. This design enables the internal components of the battery pack to be operated by removing the upper cover 112 during assembly or maintenance, effectively improving the convenience of assembling and maintaining the battery unit 300.

[0051] In this embodiment, the base 111 is in the shape of a rectangular frame with openings on both sides. It has a first receiving groove 111a for placing the battery module 310, and the side wall height of the first receiving groove 111a is lower than the installation height of the CCS component 330. This design forms an open welding space above the base 111, allowing welding tools to approach the welding points from multiple angles, meeting the requirement of welding the CCS component 330 and multiple battery modules 310 in the same process, and effectively improving the processing efficiency.

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

[0053] In this embodiment, the upper cover 112 is in the shape of a rectangular frame with openings on both sides. It has a second receiving groove 112a, and the side wall height of the second receiving groove 112a is adapted to the height of the entire housing 100. To prevent the upper cover 112 from deforming with an upward bulge or downward depression on the horizontal plane during the lifting process due to the too long side wall, a plurality of reinforcing ribs 112b are provided on the horizontal plane of the upper cover 112, and the setting direction of at least one reinforcing rib 112b is perpendicular to the lifting direction. This design avoids the deformation of the upper cover 112 during the lifting process, effectively improving the reliability and service life of the entire battery pack.

[0054] In this embodiment, multiple reinforcing ribs 112b are all arc-shaped strips and are arranged equidistantly in a line on the upper cover 112. This design ensures that the supporting force formed by the reinforcing ribs 112b is evenly distributed, and at the same time, it also ensures the aesthetics of the upper cover 112.

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

[0056] In this embodiment, rectangular mounting holes 112c communicating with the outside are also provided at both sides of the upper cover 112 near one end of the non-metallic front cover 120; when the battery pack is assembled, the rectangular mounting holes 112c correspond to the two lifting parts 210 one by one, and a person's hand can pass through the rectangular mounting holes 112c and extend into the lifting parts 210 to realize the lifting of the battery pack.

[0057] In this embodiment, connection holes are provided around the rectangular mounting holes 112c, and the connection holes are opposite to the edges of the lifting parts 210. The lifting parts 210 can be fixed on the side wall of the upper cover 112 through fasteners. This design improves the connection strength between the lifting parts 210 and the upper cover 112, enables the lifting load to be better transmitted to the upper cover 112, and reduces the stress on the non-metallic front cover 120.

[0058] As Figures 1 to 6 shown, in this embodiment, the non-metallic front cover 120 is rectangular, and an installation hole 121 penetrating through itself is provided thereon for the conductive structure 410 to extend out of the housing 100 from the inside of the housing 100, so that an external load can form an electrical connection with the battery module 310 through the conductive structure 410. Preferably, the installation hole 121 is rectangular, its width is greater than the width of the conductive structure 410, and its length is greater than the thickness of the conductive structure 410. This design enables the conductive structure 410 to pass through smoothly and ensures the convenience of assembling the conductive structure 410.

[0059] Preferably, in this embodiment, there are two groups of installation holes 121, which are arranged left and right, and there is a height difference between the two groups of installation holes 121 for cooperating with the different height arrangements of the two groups of conductive structures 410.

[0060] In this embodiment, a fixing groove 122 is also provided on the non-metallic front cover 120. The fixing groove 122 is recessed inward along the outer wall of the non-metallic front cover 120 and is on the same straight line as the installation hole 121 for accommodating the conductive fastening structure 420. Through the cooperation of the fixing groove 122 and the conductive fastening structure 420, the connecting wire of the load can be firmly fixed on the conductive structure 410 to realize a reliable electrical connection.

[0061] In this embodiment, the fixing groove 122 includes a first receiving cavity 122a and a second receiving cavity 122b that communicate with each other, and the diameter of the first receiving cavity 122a is larger than that of the second receiving cavity 122b. Among them, the first receiving cavity 122a has a hexagonal cross-section for realizing the clamping connection with the fixing member 421 and preventing the fixing member 421 from rotating along with the rotation of the connecting member 422. The second receiving cavity 122b has a cylindrical cross-section for receiving the end of the connecting member 422 passing through the fixing member 421, so that the connecting member 422 can rotate freely within the fixing member 421 without affecting the position and stability of the fixing member 421.

[0062] In this embodiment, there are two sets of fixing grooves 122. Every two vertically arranged and aligned fixing grooves 122 form a set, and the two sets of fixing grooves 122 correspond to the two sets of mounting holes 121 one by one. Among them, one set of fixing grooves 122 is located directly below the mounting hole 121, and the other set of fixing grooves 122 is located directly above the mounting hole 121. This design makes the two sets of fixing grooves 122 and the two sets of mounting holes 121 flush with each other in the left-right and up-down directions, effectively improving the aesthetics of the non-metallic front cover 120.

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

[0064] In this 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, realizing the fixation of the conductive structure 410 and ensuring the stability of the assembly of the conductive structure 410. Preferably, there are two first fixing holes 123 and they are located near the fixing groove 122.

[0065] In this embodiment, the non-metallic front cover 120 is further provided with a safety protection structure 700. The safety protection structure 700 includes an insulating side plate 710 integrally provided with the non-metallic front cover 120 and an insulating baffle 720 detachably connected to the insulating side plate 710. Among them, there are four insulating side plates 710, which are vertically arranged in pairs 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 block the conductive structure 410 outside the housing 100, preventing users from touching the conductive structure 410 and causing safety accidents when the battery pack is in a working state, effectively improving the safety of the battery pack.

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

[0067] In this embodiment, second clamping structures 600 for cooperating with the base 111 and the upper cover 112 are further provided on the upper and lower sides of the non-metallic front cover 120. The second clamping structures 600 include clamping edges 610 and second clamping grooves 620. Among them, the clamping edges 610 extend vertically towards the battery module 310 along the inner side of the non-metallic front cover 120 and form a plug-in fit with the first clamping groove 510 of the upper cover 112. The second clamping grooves 620 are U-shaped and are recessed along the inner side of the non-metallic front cover 120 towards the direction away from the battery module 310 and form a plug-in fit with the base 111. This design can realize the pre-fixation of the non-metallic front cover 120 during the assembly process of the housing 100, and improves the convenience and accuracy of assembly.

[0068] As Figures 1 to 9 shown, since the non-metallic front cover 120 is a plastic part and cannot meet the strength requirements when lifting the battery pack, therefore, in this embodiment, a reinforcing plate 200 is further provided. The reinforcing plate 200 is a sheet metal part and is detachably fixedly connected between the non-metallic front cover 120 and the base shell 110 through fasteners and is perpendicular to the non-metallic front cover 120. This design increases the connection strength between the non-metallic front cover 120 and the base shell 110 on the one hand, and makes the connection force application points between the non-metallic front cover 120 and the base shell 110 concentrated on the reinforcing plate 200, thereby reducing the strength requirements for the non-metallic front cover 120; on the other hand, it makes the connection points of the non-metallic front cover 120 move to the inside, effectively improving the aesthetics of the non-metallic front cover 120.

[0069] In this embodiment, the reinforcing plate 200 is located inside the base shell 110, and a lifting portion 210 is provided on the reinforcing plate 200. Since the reinforcing plate 200 is vertically connected to the non-metallic front cover 120, when the housing 100 is subjected to a lifting load, the application 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 portion 210. This design optimizes the transmission path of the lifting load, avoids the lifting load directly acting on the non-metallic front cover 120, effectively reduces the stress burden on the non-metallic front cover 120, and thus extends the service life of the non-metallic front cover 120.

[0070] In this embodiment, the reinforcing plate 200 includes a first reinforcing portion 201 and a second reinforcing portion 202, and the first reinforcing portion 201 and the second reinforcing portion 202 are perpendicularly connected. Among them, the first reinforcing portion 201 is used to connect with the base 111 and the upper cover 112, and the second reinforcing portion 202 is used to connect with the non-metallic front cover 120, ensuring a firm connection among the upper cover 112, the base 111, and the non-metallic front cover 120.

[0071] Preferably, the first reinforcing portion 201 is trapezoidal, forming an inclined guiding edge, which can guide the assembly of the upper cover 112 and effectively improve the convenience of assembly. The second reinforcing portion 202 is rectangular and is integrally formed with the first reinforcing portion 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 this embodiment, a rectangular notch is provided on the first reinforcing portion 201, and the lifting portion 210 is detachably arranged at the rectangular notch through a fastener, ensuring that a person's hand can smoothly reach into the lifting portion 210. Moreover, a limiting groove that forms a plug-in fit with the lifting portion 210 is also provided on the second reinforcing portion 202. When the edge of the lifting portion 210 is inserted into the limiting groove, the limiting groove can restrict the up and down movement of the lifting portion 210. This design, on the one hand, realizes the positioning of the installation position of the lifting portion 210 and the pre-fixation of the lifting portion 210, and on the other hand, further improves the stability of the installation of the lifting portion 210.

[0073] In this embodiment, the lifting portion 210 has an arc-shaped groove 211 extending along the inner wall of the reinforcing plate 200 towards the inside of the housing 100. The arc-shaped groove 211 first extends horizontally towards the inside of the housing 100 and then extends along the lifting direction, forming a relatively comfortable arc surface when a person lifts it, enabling a person's hand to apply force better. This design improves the user experience during operation. Preferably, two groups of reinforcing plates 200 are provided and arranged left and right, which is convenient for the user to operate with both hands, improves the convenience and comfort of the user's operation, and at the same time ensures the evenness of the force on both sides of the housing 100.

[0074] In this embodiment, when the non-metallic front cover 120 is snapped into the opening of the base shell 110, the non-metallic front cover 120 and the second receiving groove 112a and the first receiving groove 111a cooperate to form a receiving space for placing the battery unit 300. Moreover, the side wall of the second receiving groove 112a, the side wall of the first receiving groove 111a, and the bottom edge of the reinforcing plate 200 are in contact with each other and respectively have corresponding second fixing holes 220. By connecting through fasteners in the second fixing holes 220, the upper cover 112, the base 111, and the reinforcing plate 200 can be fixed. This design realizes the tight connection among the non-metallic front cover 120, the base 111, and the upper cover 112.

[0075] AsFigures 1 to 5 As shown, to achieve an electrical connection with an external load, in this embodiment, an electrical connection assembly 400 is provided. The electrical connection assembly 400 includes a conductive structure 410 and a conductive fastening structure 420. Among them, one end of the conductive structure 410 is connected to the circuit board 320, and the other end extends out of the housing 100 through the mounting hole 121. As part of the power transmission path, it is used to transmit current from the internal circuit to the external load. This design ensures the continuity and reliability of power transmission and also facilitates the electrical connection with the external load.

[0076] In this embodiment, the conductive structure 410 is a copper bar, which includes a first connection portion 411 and a second connection portion 412 that are perpendicular to each other. Among them, the first connection portion 411 is connected to the circuit board 320, and the second connection 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. And a bending portion 413 is provided between the first connection portion 411 and the second connection portion 412. The design of the bending portion 413 enables the conductive structure 410 to be flexibly arranged in a limited space, reduces interference with other components, and simplifies the assembly process.

[0077] Preferably, in this embodiment, the bending portion 413 is perpendicularly connected to the first connection portion 411 and the second connection portion 412 respectively. This design creates a height difference between the first connection portion 411 and the second connection portion 412, so as to be able to adapt to the mounting hole 121 with a height difference between the first conductive seat and the third conductive seat.

[0078] In this embodiment, the bending portion 413, the first connection portion 411, and the second connection portion 412 are integrally formed, and the bending portion 413 cooperates with the first connection portion 411 and the second connection portion 412 to form a stepped shape. This design avoids possible weak points during the connection of multiple components, enhances the mechanical strength of the overall structure. At the same time, it reduces the need for complex processes such as welding or bolt connection, and lowers the manufacturing cost and assembly difficulty.

[0079] In this embodiment, a through hole 412a is provided on the second connection portion 412. The through hole 412a is circular and corresponds to and is coaxial with the first fixing hole 123 one by one, so that the fastener can be conveniently passed through 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 connection portion 412 abuts against the fixing member 421, realizing the limit of the horizontal movement of the fixing member 421 and ensuring the stability of the fixing member 421 when the connecting member 422 rotates.

[0080] In this embodiment, when installing the conductive structure 410, first pass the second connecting portion 412 through the mounting hole 121 in the horizontal direction and extend it outside the housing 100, and then rotate it by 90° so that the second connecting portion 412 is vertically attached to the non-metallic front cover 120, and then fix it with fasteners.

[0081] In this embodiment, one end of the conductive fastening structure 420 is clamped in the fixing groove 122, and the other end is rotatably passed through one end of the conductive structure 410 located outside the housing 100, and the connecting wire of the load can be fixed to the conductive structure 410 through the conductive fastening structure 420. This design, through the cooperation of the conductive fastening structure 420 and the conductive structure 410, enables the connecting wire of the external load to be conveniently and firmly fixed to the conductive structure 410. While simplifying the structure, it avoids problems such as loosening or poor contact, and improves the reliability of electrical connection.

[0082] In this embodiment, the conductive fastening structure 420 includes a fixing member 421 and a connecting member 422. The fixing member 421 is clamped in the fixing groove 122, and the connecting member 422 is rotatably passed through the conductive structure 410 and the fixing member 421 in sequence, and there is a fixing gap between the connecting member 422 and the conductive structure 410; when the connecting member 422 rotates, the size of the fixing gap can be adjusted. This design, by adjusting the fixing gap, can not only achieve firm fixing of the connecting wire, but also adapt to wires of different specifications, effectively improving the flexibility and compatibility of the system.

[0083] Preferably, in this embodiment, the fixing member 421 is a hexagon nut, the connecting member 422 is a bolt, the fixing member 421 can be arranged in the first accommodating cavity 122a of the fixing groove 122, and the connecting member 422 can extend into the second accommodating cavity 122b after passing through the fixing member 421. When connecting to an external load, place the end of the connecting wire of the external load at the fixing gap, and then rotate the connecting member 422 to compress the fixing gap until the second connecting portion 412, the end of the connecting wire, and the connecting member 422 are in contact with each other, thereby realizing the fixing of the connecting wire. When disassembling, rotate the connecting member 422 in the reverse direction.

[0084] To supply power to the external load, in this embodiment, a battery unit 300 is also provided. The battery unit 300 includes a battery module 310 and a circuit board 320 arranged in the housing 100. Among them, the circuit board 320 is located between the battery module 310 and the electrical connection assembly 400, and is used to manage and distribute the electric energy of the battery module 310 and transmit it to the external load through the electrical connection assembly 400.

[0085] Such as Figures 1 to 11As shown, in this embodiment, the battery module 310 is connected to the circuit board 320 through the electrode connecting piece 340, ensuring efficient and stable current transmission. The electrode connecting piece 340 includes a positive electrode connecting piece 341 and a negative electrode connecting piece 342 provided on the CCS component 330. And there are two sets of electrical connection components 400, which correspond 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 a reliable electrical connection.

[0086] In this embodiment, the circuit board 320 is arranged vertically, and is provided with a first conductive connection seat 321, a second conductive connection seat 322 and a third conductive connection seat 323. Among them, the positive electrode connecting piece 341 and the conductive structure 410 of a set of electrical connection components 400 are both connected to the first conductive connection seat 321, the negative electrode connecting piece 342 is connected to the second conductive connection seat 322, and the conductive structure 410 of the other set of electrical connection components 400 is connected to the third conductive connection seat 323 and fixed by fasteners. This design, on the one hand, ensures the clarity and safety of the current path by separately connecting the positive electrode connecting piece 341 and the negative electrode connecting piece 342 to different conductive connection seats, avoiding short circuits or other electrical faults caused by incorrect connection; on the other hand, it realizes the direct connection of the circuit board 320, the positive electrode connecting piece 341 and the conductive structure 410. Compared with the use of terminal blocks in the prior art, the arrangement of multiple wires can be reduced, which not only simplifies the complexity of the circuit layout, but also reduces the manufacturing cost.

[0087] Preferably, in this embodiment, the fasteners are screws or bolts.

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

[0089] In this embodiment, there are at least two sets of battery modules 310. The two sets of battery modules 310 are arranged side by side, and the sides with electrodes of the two together form a support surface. And the battery unit 300 further includes a CCS component 330 provided on the support surface, and the CCS component 330 is electrically connected to the two sets of battery modules 310 respectively. This design realizes the series connection of at least two sets of modules through a single CCS component 330, effectively saving the manufacturing cost and improving the assembly efficiency at the same time.

[0090] In this embodiment, the CCS component 330 includes an insulating bracket 331, a first bus bar 332, and a second bus bar 333. Among them, the insulating bracket 331 is adapted to the size of the supporting surface and is provided with a first installation area and a second installation area. The projections of the first installation area and the second installation area in the direction perpendicular to the supporting surface are within the supporting surface. This design integrates the installation positions of the first bus bar 332 and the second bus bar 333 on the insulating bracket 331, ensuring that the first bus bar 332 and the second bus bar 333 are connected to the battery module 310 within the supporting surface. Compared with the externally connected copper bars in the prior art, it can save the layout of the copper bars and their related connection structures, and at the same time reduce the occupation of the internal horizontal space of the battery pack.

[0091] In this embodiment, the first bus bar 332 is arranged in the first installation area. By welding the first bus bar 332 to the electrodes of the battery module 310, a series circuit can be formed among multiple battery cells 311 in a single battery module 310; the second bus bar 333 is arranged in the second installation area, and both ends of the second bus bar 333 can be welded to the electrodes of two groups of battery modules 310 respectively, and a series circuit is formed between the two groups of battery modules 310. This design integrates the insulating bracket 331, the first bus bar 332, and the second bus bar 333 into one body, realizing an integrated design. It not only eliminates the need for additional externally arranged copper bars and related fastening structures, effectively reducing the production cost, but also supports the one-time welding and series connection of multiple groups of battery modules 310 and the CCS component 330, significantly improving the assembly efficiency.

[0092] Preferably, in this embodiment, the first bus bar 332 and the second bus bar 333 are rectangular and made of aluminum. This design not only has good electrical conductivity, but also can meet the welding requirements, while achieving a lightweight design.

[0093] In this embodiment, the positive connection piece 341 and the negative connection piece 342 are arranged on the side of the first installation 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 installation area is located on the side of the first installation area away from the circuit board 320, which is convenient for welding the first bus bar 332 and the second bus bar 333. Among them, the first installation area has a plurality of first installation grooves 331a, the second installation area is provided with second installation grooves 331b, and the first installation grooves 331a are adapted to the size of the first bus bar 332, and the second installation grooves 331b are adapted to the size of the second bus bar 333. This design realizes the quick positioning of the installation positions of the first bus bar 332 and the second bus bar 333.

Claims

1. A battery pack, characterized in that: include: A housing (100), the housing (100) comprising a base shell (110) having an opening and a non-metallic front cover (120) closing the opening, and the non-metallic front cover (120) is provided with a mounting hole (121) penetrating the non-metallic front cover; A reinforcing plate (200), the reinforcing plate (200) being fixedly connected between the non-metallic front cover (120) and the base shell (110), and being perpendicular to the non-metallic front cover (120); A battery unit (300), the battery unit (300) comprising a battery module (310) and a circuit board (320) arranged in the housing (100), and the battery module (310) is connected to the circuit board (320) via an electrode connecting sheet (340); An electrical connection assembly (400), the electrical connection assembly (400) comprising a conductive structure (410), one end of the conductive structure (410) being connected to the circuit board (320), and the other end of the conductive structure (410) extending out of the housing (100) through the mounting hole (121), and a load can be electrically connected to the battery module (310) through the conductive structure (410).

2. A battery pack according to claim 1, characterized in that: The non-metallic front cover (120) is also provided with a fixing groove (122), the fixing groove (122) is recessed inwardly along the outer wall of the non-metallic front cover (120) and is located on the same straight line as 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), and the other end is rotatably inserted into one end of the conductive structure (410) located outside the housing (100), and the connection line of the load can be fixed to the conductive structure (410) through the conductive fastening structure (420).

3. A battery pack according to claim 2, characterized in that: The conductive fastening structure (420) comprises a fixing member (421) and a connecting member (422); the fixing member (421) is clamped in the fixing groove (122); the connecting member (422) can rotatably pass through the conductive structure (410) and the fixing member (421) in sequence, and a fixed gap is provided between the connecting member (422) and the conductive structure (410); when the connecting member (422) rotates, the size of the fixed gap can be adjusted.

4. A battery pack according to claim 3, characterized in that: The fixing groove (122) comprises a first accommodating cavity (122a) and a second accommodating cavity (122b) which are interconnected, the diameter of the first accommodating cavity (122a) is larger than the diameter of the second accommodating cavity (122b), and the fixing member (421) is clamped in the first accommodating cavity (122a), and the connecting member (422) can extend into the second accommodating cavity (122b) after passing through the fixing member (421).

5. A battery pack according to claim 3, characterized in that: The conductive structure (410) comprises a first connecting portion (411) and a second connecting portion (412), wherein the first connecting portion (411) is connected to the circuit board (320), the second connecting portion (412) extends out of the housing (100) and is arranged opposite to the fixing groove (122), and a bending portion (413) is provided between the first connecting portion (411) and the second connecting portion (412).

6. A battery pack according to claim 5, characterized in that: 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.

7. A battery pack according to claim 5, characterized in that: The non-metallic front cover (120) is provided with a first fixing hole (123), and the second connecting portion (412) is provided with a through hole (412a). A 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), and after the conductive structure (410) is fixed, the second connecting portion (412) abuts against the fixing member (421).

8. The battery pack according to claim 1, characterized in that: The electrode connecting sheet (340) comprises a positive electrode connecting sheet (341) and a negative electrode connecting sheet (342), and the electrical connection assembly (400) is provided with two groups corresponding to the positive electrode connecting sheet (341) and the negative electrode connecting sheet (342) one by one.

9. A battery pack according to claim 8, characterized in that: The circuit board (320) is provided with a first conductive connection seat (321), a second conductive connection seat (322) and a third conductive connection seat (323), wherein the positive electrode connection plate (341) and the conductive structure (410) of a group of the electrical connection components (400) are connected to the first conductive connection seat (321), the negative electrode connection plate (342) is connected to the second conductive connection seat (322), and the conductive structure (410) of another group of the electrical connection components (400) is connected to the third conductive connection seat (323).

10. A battery pack according to claim 8, characterized in that: The battery modules (310) are provided with at least two groups, the two groups of battery modules (310) are arranged side by side, and the sides of the two groups with electrodes together form a support surface, the battery unit (300) comprises a CCS assembly (330) arranged on the support surface, the CCS assembly (330) is electrically connected to the two groups of battery modules (310) respectively, and the positive electrode connecting piece (341) and the negative electrode connecting piece (342) are arranged on the CCS assembly (330).

11. A battery pack according to claim 10, characterized in that: 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 installation area and a second installation area; the projections of the first installation area and the second installation area in a direction perpendicular to the support surface are located within the support surface; the first busbar (332) is provided in the first installation area, and by welding the first busbar (332) with the electrodes of the battery module (310), a plurality of battery cells (311) in a single battery module (310) can form a series circuit; the second busbar (333) is provided in the second installation area, and two ends of the second busbar (333) can be respectively welded to the electrodes of two groups of battery modules (310), so that the two groups of battery modules (310) form a series circuit.

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

13. The battery pack according to claim 10, characterized in that: The reinforcing plate (200) is located inside the base shell (110), and a lifting portion (210) is provided on the reinforcing plate (200); 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 portion (210).

14. A battery pack according to claim 13, characterized in that: The base shell (110) comprises a detachably connected base (111) and an upper cover (112), wherein the base (111) and the upper cover (112) are respectively snap-connected to the non-metallic front cover (120), wherein the base (111) has a first receiving groove (111a) for placing the battery module (310), and the side wall height of the first receiving groove (111a) is lower than the installation position of the CCS assembly (330).

15. A battery pack according to claim 14, characterized in that: The upper cover (112) has a second receiving groove (112a), and the reinforcing plate (200) is detachably connected to the non-metallic front cover (120); when the non-metallic front cover (120) is stuck in the opening, the non-metallic front cover (120) cooperates with the second receiving groove (112a) and the first receiving groove (111a) to form a receiving space, and the side wall of the second receiving groove (112a), the side wall of the first receiving groove (111a) and the bottom edge of the reinforcing plate (200) are in contact with each other, and each has a one-to-one corresponding second fixing hole (220), and the upper cover (112), the base (111) and the reinforcing plate (200) can be fixed by fasteners connected in the second fixing hole (220).

Images