Fixed row and battery pack

Abstract

The invention discloses a fixed row and a battery pack. The fixed row comprises a main body part, a first connecting piece and a second connecting piece, the main body part comprises a first surface and a second surface opposite to each other along a first direction, the main body part extends along a second direction, and the first direction and the second direction intersect; the first connecting piece is connected with the main body part and protrudes out of the first surface, a first fixing part is arranged on the first connecting piece, and the first connecting piece is connected with two battery modules arranged in the second direction through the first fixing part; the second connecting piece is connected with the main body part and protrudes out of the second surface, a second fixing part is arranged on the second connecting piece, and the second connecting piece is connected with a wire harness of the battery module through the second fixing part. The fixing row is connected with the two adjacent fixing end plates through the first connecting pieces, so that different battery modules are connected into a whole, the mounting and fixing strength of the battery modules is improved, and reliable fixing is facilitated; and the wire harness of the battery module can be collected on the fixed row, so that the interference or damage to other parts due to the fact that the wire harness is not restrained in the battery pack is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of energy storage battery, in particular to a fixed row and a battery pack. BACKGROUND

[0002] The battery pack is the core energy storage unit of electric vehicles, energy storage systems and other equipment, and its essence is a highly integrated system integrating electrochemical energy storage, mechanical structure, thermal management, electrical control and safety protection. A typical battery pack usually includes a box, a plurality of battery modules placed in the box, a battery management system (BMS), a thermal management system, and various electrical connectors (such as high-voltage wiring harness, sampling wiring harness).

[0003] Among them, each battery module is composed of a plurality of battery cells arranged side by side in front and back, and two end plates located at the front and back ends of the battery module, and the battery module can be fixed in the box by bolt connection. However, the battery modules lack effective fixation, resulting in problems such as unstable assembly and large assembly gap when multiple battery modules are installed. Moreover, the wiring harnesses drawn from the battery modules also lack effective fixation, which can cause the wiring harnesses to loosen and displace in a long-term vibration environment, and the sharp edges of the box or the module can cause abrasion of the insulation layer, thereby causing electrical faults such as short circuit and signal interference, further reducing the overall safety and long-term reliability of the battery pack. SUMMARY

[0004] The purpose of the present application is to provide a fixed row and a battery pack to solve the problems of fixation between battery modules and lack of fixation of the wiring harnesses of the battery modules.

[0005] To achieve the purpose of the present application, the present application provides the following technical solutions: In a first aspect, the present application provides a fixed row, comprising a main body, a first connecting piece and a second connecting piece; the main body comprises a first face and a second face opposite to each other along a first direction, the main body extends along a second direction, and the first direction and the second direction intersect; the first connecting piece is connected to the main body and protrudes from the first face, the first connecting piece has a first fixing part thereon, and the first connecting piece is connected to two battery modules arranged along the second direction through the first fixing part; the second connecting piece is connected to the main body and protrudes from the second face, the second connecting piece has a second fixing part thereon, and the second connecting piece is connected to the wiring harnesses of the battery modules through the second fixing part.

[0006] In some embodiments, the second connecting piece is located on the same side of the main body along the second direction as the first connecting piece, the first connecting piece and the second connecting piece are spaced apart along the second direction, the main body, the first connecting piece and the second connecting piece are of an integrated structure, and the second connecting piece and the first connecting piece are both bent relative to the main body.

[0007] In some embodiments, the main body includes a first edge and a second edge facing away from each other along a third direction, the first connecting piece and the second connecting piece are connected at the first edge, the first edge is provided with a relief groove between the first connecting piece and the second connecting piece, and the third direction intersects the first direction and the second direction.

[0008] In some embodiments, the relief groove includes a first relief groove and a second relief groove spaced apart, the first relief groove has a larger caliber than the second relief groove along the second direction, and the first relief groove has a lower bottom wall than the second relief groove along the third direction.

[0009] In some embodiments, the first connecting piece includes a third face facing away from the main body, the second connecting piece includes a fourth face facing away from the main body, and the fourth face is higher than the third face along the third direction.

[0010] In some embodiments, the first edge includes a fifth face facing away from the second edge, the fifth face is higher than the third face along the third direction, and the fourth face is higher than the fifth face.

[0011] In some embodiments, the first fixing portion includes a plurality of first fixing holes, at least two of the first fixing holes are spaced apart along the second direction, the fixing row (400) is used for fixing adjacent two fixing end plates (300), the fixing end plate (300) includes a first matching hole (310), and the first fixing hole is used for being arranged opposite to the first matching hole.

[0012] In some embodiments, the second fixing portion includes a plurality of second fixing holes, the second fixing holes are arranged in an array, and the second fixing holes have a smaller caliber than the first fixing holes.

[0013] In some embodiments, along the first direction, a distance from a center of the first fixing hole to the first face is C1, a maximum distance from a center of the first matching hole to a surface of the fixing end plate facing the first face is C2, and the fixing row satisfies 1.1≤C1 / C2≤2.

[0014] In some embodiments, along the first direction, the distance from the center of the first fixing hole to the first connecting piece away from the first surface is C3, the maximum distance from the center of the first fitting hole to the surface of the fixed end plate away from the first surface is C4, and the fixed row satisfies: 0

[0015] In some embodiments, the number of the first connecting pieces is n, n≥2, the n first connecting pieces are sequentially and spaced apart along the second direction, the number of the second connecting pieces is m, m≤n, and the second connecting pieces are arranged between two adjacent first connecting pieces.

[0016] In some embodiments, the fixed row further comprises an insulating piece connected to the surface of the second connecting piece away from the main body part, and the insulating piece and the second connecting piece are detachably connected.

[0017] In some embodiments, the insulating piece comprises a top wall and a peripheral wall connected to each other, the top wall and the peripheral wall enclose a receiving groove, the second connecting piece is received in the receiving groove, and the edge of the second connecting piece is in interference fit with the peripheral wall.

[0018] In some embodiments, along the first direction, the length of the first connecting piece is A1, the length of the second connecting piece is A2, and the fixed row satisfies: A1

[0019] In some embodiments, along the second direction, the width of the first connecting piece is B1, the width of the second connecting piece is B2, and the fixed row satisfies: B1

[0020] In a second aspect, the present application provides a battery pack comprising at least two battery modules and the fixed row of the first aspect, the battery module comprising a fixed end plate, and the fixed row connecting the fixed end plates of two adjacent battery modules.

[0021] The fixed row provided by the present application can be used to connect the fixed end plates of adjacent battery modules. When each battery module is fixedly installed in the box of the battery pack, the fixed row connects two adjacent fixed end plates through the first connecting piece to connect different battery modules as a whole, thereby improving the installation and fixing strength of the battery module and facilitating reliable fixation. In addition, the second connecting piece is arranged on the second surface, and the wire harness drawn out from the battery module can be fixed by the second fixing part of the second connecting piece. The wire harness can be bundled on the fixed row, thereby avoiding interference or damage to other components caused by the unconstrained wire harness in the battery pack. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to make the technical solutions in the embodiments of the present application or the prior art clearer, the accompanying drawings needed in the embodiments or prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description only only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative work based on these drawings.

[0023] Figure 1 is an appearance view of a battery pack of an embodiment; Figure 2 is an appearance view of a battery module and a fixed row connection of an embodiment; Figure 3 is an appearance view of a fixed row of an embodiment; Figure 4 is an appearance view of a fixed row of another embodiment; Figure 5 is a front view of a fixed row of an embodiment; Figure 6 is a partial view of a fixed row of an embodiment; Figure 7 is a front view of a battery module and a fixed row connection of an embodiment; Figure 8 is an appearance view of an insulating piece of an embodiment; Figure 9 is a top view appearance view of an insulating piece of an embodiment; Figure 10 is a sectional view of a battery module and a fixed row connection of an embodiment; Figure 11 is a top view of a fixed row of an embodiment.

[0024] Explanation of reference signs: 1-battery pack, 10-box body, 20-battery module, 200-battery cell, 300-fixed end plate, 310-first fitting hole, 400-fixed row, 410-main body part, 411-first surface, 412-second surface, 410A-first edge, 410B-second edge, 413-first connecting section, 414-second connecting section, 415-fifth surface, 420-first connecting piece, 421-first fixing part, 421A-first fixing hole, 421B-fixing column, 422-third surface, 430-second connecting piece, 431-second fixing part, 431A-second fixing hole, 432-fourth surface, 440-avoidance groove, 441-first avoidance groove, 442-second avoidance groove, 450-insulating piece, 451-top wall, 452-outer peripheral wall, 453-fitting groove, 454-second fitting hole, 001-first direction, 002-second direction, 003-third direction. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0026] It should be noted that when a component is referred to as being "fixed" to another component, it can be directly on the other component or there can be an intervening component. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or there can be an intervening component.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The use of the terms "and / or" includes a combination of one or more of the associated listed items.

[0028] Some embodiments of the present application will be described in detail below with reference to the drawings. The following embodiments and features in the embodiments can be combined with each other without conflict.

[0029] The present application provides a battery pack 1, please refer to Figure 1 and Figure 2 The battery pack 1 includes a box body 10 and a battery module 20 received in the box body 10. The box body 10 can include a bottom plate and a shell, the battery module 20 is mounted on the bottom plate, and the shell is detachably connected with the bottom plate. The number of battery modules 20 is multiple, and the multiple battery modules 20 are placed side by side in the box body 10.

[0030] In some embodiments, please refer to Figure 2 The battery module 20 includes a cell 200 and a fixed end plate 300. Specifically, the battery module 20 includes a length direction, a width direction and a height direction. The battery module 20 can include at least one cell 200, and the cell 200 can be a square cell 200. Preferably, the battery module 20 includes multiple cells 200, and the multiple cells 200 are sequentially arranged along the length direction.

[0031] In specific embodiments, the number of fixed end plates 300 is two, and the two fixed end plates 300 are arranged on the two sides of the battery module 20 along the length direction, the fixed end plates 300 are used to fix the battery cells, and the battery module 20 can be hoisted through the fixed end plates 300. The battery cells 200 are arranged between the fixed end plates 300, and the two fixed end plates 300 are used to clamp the battery cells 200. The fixed end plates 300 can be matched with the fixing belts to tighten the battery cells 200.

[0032] In some embodiments, referring to Figure 2 , the battery pack 1 further comprises a fixing row 400, the fixing row 400 is used to fix adjacent battery modules 20, and the fixing row 400 can be connected to the fixed end plate 300. Specifically, the front end plate and the rear end plate are arranged at the front end and the rear end of the battery module 20 respectively, and the front end plate and the rear end plate are both fixed end plates 300, and the battery cells 200 are located between the front end plate and the rear end plate. The fixing row 400 is connected to the front end plate and the rear end plate, and the fixing row 400 can be connected to a plurality of front end plates arranged along the width direction, or the fixing row 400 can be connected to a plurality of rear end plates arranged along the width direction.

[0033] In some embodiments, referring to Figure 3 , the fixing row 400 comprises a main body 410, a first connecting piece 420 and a second connecting piece 430, the main body 410 comprises a first face 411 and a second face 412 opposite to each other along a first direction 001, the main body 410 extends along a second direction 002, and the first direction 001 and the second direction 002 intersect; the first connecting piece 420 is connected to the main body 410 and protrudes from the first face 411, the first connecting piece 420 has a first fixing part 421, and the first connecting piece 420 is connected to two battery modules 20 arranged along the second direction 002 through the first fixing part 421; the second connecting piece 430 is connected to the main body 410 and protrudes from the second face 412, the second connecting piece 430 has a second fixing part 431, and the second connecting piece 430 is connected to the wire harness of the battery module 20 through the second fixing part 431.

[0034] In specific embodiments, after the fixing row 400 is installed to the battery pack 1, the first direction 001 can be the length direction in the above-mentioned embodiments, the second direction 002 can be the width direction, and the third direction 003 can be the height direction; therefore, for the convenience of description, the first direction 001 is referred to as the length direction, the second direction 002 is referred to as the width direction, and the third direction 003 is referred to as the height direction.

[0035] In specific embodiments, the main body 410 can be a long strip-shaped structure, the first surface 411 and the second surface 412 are both two large surfaces of the main body 410. After the fixing row 400 is installed to the battery pack 1, the first surface 411 of the main body 410 can face the fixing end plate 300, and the second surface 412 faces away from the fixing end plate 300. The main body 410 extends along the second direction 002, so that the orthographic projection of the main body 410 on the first direction 001 can be located on the fixing end plates 300 arranged side by side. The main body 410 can be arranged parallel to the fixing end plates 300, and the main body 410 can have a spacing distance with the fixing end plates 300.

[0036] In specific embodiments, the first connecting piece 420 and the second connecting piece 430 are both connected to the main body 410, and are respectively located on two opposite surfaces of the main body 410. The first connecting piece 420 and the second connecting piece 430 are both strip-shaped structures, and the shape and size of the first connecting piece 420 and the second connecting piece 430 can be different. Optionally, the first connecting piece 420 and the second connecting piece 430 can be an integral structure with the main body 410, that is, the main body 410, the first connecting piece 420 and the second connecting piece 430 are folded from the same plate material; or the first connecting piece 420 and the second connecting piece 430 can be connected to the main body 410 by secondary connection, such as clamping, welding, gluing, magnetic connection, screwing, etc.

[0037] In specific embodiments, the first connecting piece 420 and the second connecting piece 430 are both connected to the main body 410 at an angle, and the angle between the large surface of the first connecting piece 420 and the first surface 411 can be 70°-90°, and the angle between the large surface of the second connecting piece 430 and the second surface 412 can be 70°-90°. Preferably, the angle between the large surface of the first connecting piece 420 and the first surface 411 is 90°, and the angle between the large surface of the second connecting piece 430 and the second surface 412 is 90°.

[0038] In specific embodiments, the first connecting piece 420 has a first fixing portion 421, and the first fixing portion 421 is used to cooperate with the fixing end plate 300, so that the first connecting piece 420 is connected to the fixing end plate 300. Optionally, the fixing end plate 300 can include an end surface facing away from the bottom plate, and the first connecting piece 420 can be connected to the end surface of the fixing end plate 300. Optionally, the connection mode of the first connecting piece 420 and the fixing end plate 300 includes but is not limited to welding, gluing, magnetic connection, screwing, etc.

[0039] In specific embodiments, the second connecting piece 430 has a second fixing portion 431, and the second fixing portion 431 is used to fix the wire harness, so that the wire harness can be constrained on the second connecting piece 430. Optionally, the connection mode of the second connecting piece 430 and the wire harness includes but is not limited to clamping, gluing, bundling, etc.

[0040] The fixed row 400 provided by the application can be used to connect the fixed end plates 300 of adjacent battery modules 20. When the battery modules 20 are fixedly installed in the box 10 of the battery pack 1, the fixed row 400 connects two adjacent fixed end plates 300 through the first connecting piece 420 to connect different battery modules 20 as a whole, thereby improving the installation and fixing strength of the battery modules 20 and facilitating reliable fixing. In addition, the second connecting piece 430 is arranged on the second surface 412, and the second fixing part 431 of the second connecting piece 430 can fix the wire harness led out from the battery module 20. The wire harness can be bundled on the fixed row 400, thereby avoiding interference or damage to other components caused by the unrestrained wire harness in the battery pack 1.

[0041] In some embodiments, referring to Figure 3 The second connecting piece 430 and the first connecting piece 420 are located on the same side of the main body part 410 along the second direction 002. The first connecting piece 420 and the second connecting piece 430 are arranged in a spaced manner along the second direction 002. The main body part 410, the first connecting piece 420 and the second connecting piece 430 are of an integrated structure. The second connecting piece 430 and the first connecting piece 420 are both bent relative to the main body part 410.

[0042] In specific embodiments, the fixed row 400 can be obtained by bending a plate member, which can be a metal plate member. The metal fixed row 400 can ensure its structural strength. The bending directions of the first connecting piece 420 and the second connecting piece 430 relative to the main body part 410 are opposite to form flanges, so that the first connecting piece 420 and the second connecting piece 430 protrude relative to the first surface 411 and the second surface 412, respectively. The first connecting piece 420 and the second connecting piece 430 are spaced along the second direction 002, i.e., along the third direction 003. The orthographic projections of the first connecting piece 420 and the second connecting piece 430 on the bottom plate do not coincide and do not intersect.

[0043] The application sets the fixed row 400 as an integrated structure, and the second connecting piece 430 and the first connecting piece 420 are both bent relative to the main body part 410, which can reduce the manufacturing cost of the fixed row 400, without the need for welding or other processes for assembly. In addition, the integrated fixed row 400 has stable structure and excellent compression resistance and impact resistance. At the same time, the second connecting piece 430 and the first connecting piece 420 are arranged on the same side of the main body part 410, which can facilitate the connection and fixing of the fixed row 400 with other components. The position of the second connecting piece 430 can match the height of the wire harness led out from the battery module 20, thereby avoiding unnecessary wire length.

[0044] In some embodiments, referring to Figure 4The second connecting sheet 430 and the first connecting sheet 420 can also be located on two sides of the main body part 410 respectively, the main body part 410, the first connecting sheet 420 and the second connecting sheet 430 are of an integrated structure, and the second connecting sheet 430 and the first connecting sheet 420 are both bent and formed relative to the main body part 410. Specifically, the main body part 410 includes a first edge 410A and a second edge 410B which are opposite in the third direction 003, and the first connecting sheet 420 can be connected to the first edge 410A, and the second connecting sheet 430 can be connected to the second edge 410B.

[0045] In specific embodiments, to adapt to different wiring harness arrangement requirements and internal space layouts of the battery pack 1, the second connecting sheet 430 and the first connecting sheet 420 can be located on different sides. The side-by-side arrangement mode can completely separate the wiring harness fixing area and the battery module 20 connecting area, so that the wiring harness does not need to be concentrated at the position of the battery module 20 electrical connection; this setting mode is suitable for scenarios with a large number of wiring harnesses that need to be individually planned for wiring channel, and can further optimize the regularity of wiring harness arrangement and avoid interference between the wiring harness and the connecting structure.

[0046] In some embodiments, the second connecting sheet 430 and the first connecting sheet 420 can also be located on the middle part of the main body part 410, and the first connecting sheet 420 and the second connecting sheet 430 are detachably connected to the main body part 410. Specifically, the middle part of the main body part 410 has a matching part, and the first connecting sheet 420 and the second connecting sheet 430 can be connected to the matching part. Alternatively, the connection mode of the first connecting sheet 420 and the second connecting sheet 430 to the main body part 410 can be clamping.

[0047] In specific embodiments, the connection mode of the first connecting sheet 420 and the second connecting sheet 430 to the main body part 410 is the same, so only the connection mode of the first connecting sheet 420 to the main body part 410 is described. The main body part 410 can be provided with a clamping hole (matching part), and the first connecting sheet 420 is provided with a protrusion, which is clamped into the clamping hole to connect the first connecting sheet 420 to the main body part 410; or the main body part 410 can be provided with a protrusion (matching part), and the first connecting sheet 420 is provided with a clamping hole, which is clamped into the clamping hole to connect the first connecting sheet 420 to the main body part 410.

[0048] In specific embodiments, the first connecting sheet 420 and the second connecting sheet 430 are detachably connected to the main body part 410 through the matching part, which facilitates adjustment of the position and number of connecting sheets according to actual assembly requirements, adapts to different specifications of battery modules and wiring harness layouts; and assembly and disassembly can be tool-free, which is more efficient.

[0049] In some embodiments, please refer to Figure 3 and Figure 5The main body 410 includes a first edge 410A and a second edge 410B away from each other along a third direction 003, the first connecting piece 420 and the second connecting piece 430 are connected to the first edge 410A, the first edge 410A is provided with a clearance groove 440, and the clearance groove 440 is located between the first connecting piece 420 and the second connecting piece 430. The third direction 003 intersects the first direction 001 and the second direction 002.

[0050] In specific embodiments, the first edge 410A is farther away from the bottom plate than the second edge 410B, the clearance groove 440 is provided on the first edge 410A, and the opening of the clearance groove 440 faces away from the bottom plate. The clearance groove 440 also penetrates the first face 411 and the second face 412. The extension direction of the clearance groove 440 on the main body 410 can be the third direction 003, that is, the depth direction of the clearance groove 440 is the third direction 003. By providing the clearance groove 440 on the main body 410, the clearance groove 440 can pass through the wire harness, or the clearance groove 440 can avoid interference with other components on the battery module 20. The depth of the clearance groove 440 can be flexibly adjusted according to the size of the component to be avoided, to ensure sufficient avoidance and not affect the structural strength of the main body 410.

[0051] In specific embodiments, the clearance groove 440 is arranged close to the first connecting piece 420 or the second connecting piece 430. The main body 410 can include a first connecting section 413 and a second connecting section 414, the first connecting section 413 is connected at an angle to the first connecting piece 420, and the second connecting section 414 is connected at an angle to the second connecting piece 430. The side wall of the clearance groove 440 is formed by the first connecting section 413 or the second connecting section 414, so that the clearance groove 440 is close to the first connecting piece 420 or the second connecting piece 430. Therefore, the clearance groove is closely adjacent to the connecting piece, which can accurately avoid the interference components around the connecting piece, and at the same time, does not need to extend the main body structure, thereby ensuring the compactness of the overall structure.

[0052] In some embodiments, referring to Figure 3 and Figure 5 The clearance groove 440 includes a first clearance groove 441 and a second clearance groove 442 arranged at intervals, the caliber L1 of the first clearance groove 441 is greater than the caliber L2 of the second clearance groove 442 along the second direction 002 (i.e. L1>L2); along the third direction 003, the bottom wall of the first clearance groove 441 is lower than the bottom wall of the second clearance groove 442 (i.e. H1

[0053] In specific embodiments, the first and second avoiding grooves 441 and 442 can be used to avoid components with different width dimensions, for example, a wider wire harness or a connecting row can pass through the first avoiding groove 441, and a thinner wire harness or a small protrusion can pass through the second avoiding groove 442. Therefore, by differentiating the design, all-around avoidance is achieved, further improving the assembly compatibility and adaptability of the fixing row 400, and ensuring that the internal structure layout of the battery pack 1 is reasonable and interference-free.

[0054] In some embodiments, please refer to Figure 3 and Figure 5 The first connecting piece 420 includes a third surface 422 facing away from the main body part 410, and the second connecting piece 430 includes a fourth surface 432 facing away from the main body part 410. In the third direction 003, the fourth surface 432 is higher than the third surface 422. Specifically, the third surface 422 and the fourth surface 432 both face away from the bottom plate of the box body 10; in the third direction 003, the thickness of the first connecting piece 420 and the thickness of the second connecting piece 430 can be the same, and in the case that the fourth surface 432 is higher than the third surface 422, the height at which the second connecting piece 430 is located can be higher than the height at which the first connecting piece 420 is located.

[0055] By setting the second connecting piece 430 to be higher than the first connecting piece 420, the second connecting piece 430 can better adapt to the height of the wire harness led out from the battery module 20, and the wire harness can be fixed along the natural direction of travel and can be bundled without excessive bending, effectively avoiding fatigue and damage to the surface layer of the wire harness due to forced bending, while reducing internal stress of the wire harness and reducing the risk of fracture during long-term use, further improving the stability of electrical connection of the battery pack 1.

[0056] In some embodiments, please refer to Figure 3 and Figure 5 The first edge 410A includes a fifth surface 415 facing away from the second edge 410B, and in the third direction 003, the fifth surface 415 is higher than the third surface 422, and the fourth surface 432 is higher than the fifth surface 415. Specifically, the main body part 410 further includes a shielding section, the shielding section includes a fifth surface, the fifth surface 415 is a side surface of the main body part 410 facing away from the bottom plate of the box body 10, the shielding section is arranged separately from the first connecting section 413 or the second connecting section 414 in the above description, and the shielding section is located between two adjacent avoiding grooves, and the side wall of the avoiding groove can be formed by the shielding section. The shielding section can protrude from the first connecting piece 420, and the second connecting piece 430 can protrude from the shielding section.

[0057] In specific embodiments, the sidewall of the avoidance groove 440 can be directly formed by the end face of the shielding section, without the need for additional blocking structure, which not only simplifies the processing technology of the main body 410, but also forms lateral protection for the components in the avoidance groove 440 by the shielding section, avoiding damage to the components caused by external collision or vibration. The shielding section as a whole protrudes from the third face 422 of the first connecting plate 420, and the second connecting plate 430 further protrudes from the fifth face 415 of the shielding section, which can also utilize the height difference to avoid mutual interference between the connecting structure of the first connecting plate 420, the protection structure of the shielding section, and the wire harness fixing structure of the second connecting plate 430, while providing more sufficient arrangement space for the wire harness, thereby improving the regularity of the internal structure of the battery pack 1.

[0058] In some embodiments, referring to Figure 3 and Figure 10 The fixed end plate 300 includes a first matching hole 310, and the first fixed part 421 includes a plurality of first fixed holes 421A, at least two first fixed holes 421A are arranged along the second direction 002, and the first fixed hole 421A is arranged opposite to the first matching hole 310. Specifically, the first fixed hole 421A penetrates the first connecting plate 420 along the third direction 003, and the battery pack 1 further includes a first connecting piece. After the fixed end plate 300 and the fixed row 400 are assembled, the first matching hole 310 and the first fixed hole 421A are opposite along the third direction 003, and the first connecting piece passes through the first fixed hole 421A and the first matching hole 310 to lock the fixed end plate 300 and the fixed row 400.

[0059] In specific embodiments, the first connecting piece can be a bolt. The first matching hole 310 can penetrate the fixed end plate 300 along the third direction 003. The bottom plate can include a support beam, which is located on the side of the fixed end plate 300 away from the fixed row 400 along the third direction 003, and a hole is formed in the support beam. The first connecting piece passes through the first matching hole 310 to a depth of the hole formed in the support beam, so as to lock the battery module 20 on the bottom plate.

[0060] In specific embodiments, the first fixed part 421 includes two first fixed holes 421A, and the two first fixed holes 421A are arranged along the second direction 002. One of the first fixed holes 421A is used to align with the first matching hole 310 on one fixed end plate 300, and the other first fixed hole 421A is used to align with the first matching hole 310 on the adjacent another fixed end plate 300. In other embodiments, the first fixed part 421 includes four first fixed holes 421A, two of which are matched with one fixed end plate 300, and the other two are matched with another fixed end plate 300.

[0061] In some embodiments, referring to Figure 6 andFigure 10 The first fixing part 421 can include a fixing column 421B located on a side of the first connecting sheet 420 facing away from the third surface 422. The fixing column 421B extends in the third direction 003 and is used to extend into the first matching hole 310. Specifically, the fixing column 421B protrudes from the back of the first connecting sheet 420 (the side facing away from the third surface 422), and the fixing column 421B and the first connecting sheet 420 can be an integral structure, and the fixing column 421B can be directly clamped into the first matching hole 310.

[0062] In specific embodiments, the shape of the fixing column 421B can be a cylinder or a cuboid. Alternatively, the length of the fixing column 421B can be less than the depth of the first matching hole 310, and the above-mentioned support beam can also be provided with a column body identical to the fixing column 421B. The column body of the support beam also extends into the first matching hole 310, and the fixing column 421B and the column body of the support beam are oppositely arranged in the third direction 003. By providing the fixing column 421B on the first connecting sheet 420, the additional first connecting piece can be omitted, the number of parts of the battery pack 1 can be reduced, and the assembly efficiency of the fixing row 400 and the fixing end plate 300 can be improved. At the same time, the other end of the fixing end plate 300 can also be fixed by the column body on the support beam, so as to lock the battery module 20 on the bottom plate.

[0063] In specific embodiments, the fixing column 421B and the first connecting sheet 420 are an integral structure; or the fixing column 421B and the first connecting sheet 420 can be formed by welding. The fixing row 400 can also be made of plastic material, so that the fixing column 421B has a deformable feature. The fixing column 421B can be interference fit with the first matching hole 310 to ensure that the fixing column 421B cannot come out of the first matching hole 310, and the fixing row 400 is stable and cannot rotate during installation. Alternatively, the fixing column 421B is a hollow structure, which can reduce the weight of the fixing row 400 and ultimately reduce the weight of the battery pack 1.

[0064] In specific embodiments, the size of the fixing column 421B in the third direction 003 can be greater than the size of the main body part 410 in the third direction 003. Please refer to Figure 6 The length S1 of the fixing column 421B in the third direction 003 is greater than the length S2 of the main body part 410 in the third direction 003 (i.e. S1 > S2), so that the fixing column 421B can protrude from the end of the main body part 410 away from the first connecting sheet 420. The advantage of providing a longer fixing column 421B is that the fixing column 421B can extend into a deeper part of the first matching hole 310, and the fixing row 400 is not easy to come out during the assembly of the battery module 20.

[0065] In specific embodiments, the first fixing part 421 can simultaneously include the first fixing hole 421A and the fixing column 421B, and each fixing end plate 300 needs to cooperate with at least one fixing hole and one fixing column 421B. Exemplarily, the fixing column 421B can realize the positioning of pre-mounting the fixing row 400 with the fixing end plate 300, avoiding the movement of the fixing row 400 in the installation process.

[0066] In some embodiments, referring to Figure 3 , the second fixing part 431 includes a plurality of second fixing holes 431A, the second fixing holes 431A are arranged in an array, and the aperture of the second fixing hole 431A is smaller than the aperture of the first fixing hole 421A. Specifically, the second fixing hole 431A penetrates the second connecting piece 430 along the third direction 003, and the battery pack 1 further includes a second connecting piece, which penetrates the second fixing hole 431A and fixes the wire harness of the battery module 20 on the second connecting piece 430. The second fixing hole 431A and the first fixing hole 421A are both circular holes, and the aperture of the first fixing hole 421A is larger.

[0067] In specific embodiments, the second connecting piece can be a cable tie. The cable tie penetrates the second fixing hole 431A and ties the wire harness on the second connecting piece 430. The cost of using a cable tie as the second connecting piece is lower, and it is convenient to adapt to the thickness of the wire harness, and the cable tie is also more convenient to disassemble. In other embodiments, the second connecting piece can also be a throat clamp and the like.

[0068] In some embodiments, referring to Figure 3 , the number of the first connecting pieces 420 is n, n≥2, the n first connecting pieces 420 are sequentially and spaced apart along the second direction 002, and the number of the second connecting pieces 430 is m, m≤n, and the second connecting piece 430 is arranged between the adjacent two first connecting pieces 420. Specifically, the number of the first connecting pieces 420 can be related to the number of the battery modules 20, and the number of the battery modules 20 can be greater than 3, specifically n+1; at least one second connecting piece 430 can be arranged between the adjacent two first connecting pieces 420.

[0069] In specific embodiments, the number of the battery modules 20, the first connecting pieces 420 and the second connecting pieces 430 can be n+1, n, n-1. In this way, one second connecting piece 430 can be arranged between the adjacent two first connecting pieces 420. The spacing between the adjacent two first connecting pieces 420 can be the same, and the spacing between the second connecting piece 430 and the adjacent two first connecting pieces 420 can be different, so as to adapt to the wire harness led out of different battery modules 20, and avoid the waste of materials caused by the wire harness of part of the battery modules 20 being too long.

[0070] In some embodiments, referring to Figure 7 and Figure 8The fixing row 400 further comprises an insulating piece 450 connected to a surface of the second connecting sheet 430 away from the main body 410, and the insulating piece 450 is detachably connected with the second connecting sheet 430. Specifically, the insulating piece 450 can be made of plastic, and the insulating piece 450 is used to cover at least part of the surface of the second connecting sheet 430, and the pixels in the battery pack 1 can be connected with the second connecting sheet 430 through the insulating piece 450.

[0071] In specific embodiments, the fixing row 400 is made of metal. If the wire harness is directly fixed on the second connecting sheet 430, two risks may occur: one is that the second connecting sheet 430 contacts the inner wire of the wire harness to cause short circuit, and the other is that the edge of the second connecting sheet 430 is easy to wear the outer skin of the wire harness. Therefore, the insulating piece 450 can be additionally arranged on the second connecting sheet 430, and by virtue of the insulating property, the outer skin of the wire harness can be prevented from being worn, and the short circuit problem can be avoided.

[0072] In specific embodiments, the insulating piece 450 can be detachably connected with the fixing row 400, and the insulating piece 450 can be a separate part. This structure not only can simplify the installation process, but also is more convenient for production and manufacturing and later replacement, and can improve the recycling rate and recycling value. Alternatively, the insulating piece 450 can be assembled on the second connecting sheet 430, and the specific assembly methods include but are not limited to clamping, bonding, magnetic connection, screwing and the like.

[0073] In other embodiments, the insulating piece 450 can be an adhesive insulating film, such as a polyimide film, a polytetrafluoroethylene film, and the like, which can be directly pasted on the surface of the second connecting sheet 430. This pasting type insulating film not only has high mass production efficiency, but also can be adapted to second connecting sheets 430 of different shapes, and has strong versatility.

[0074] In other embodiments, the insulating piece 450 can also be an insulating coating formed by insulating paint (insulating coating), such as a silicone coating, an epoxy resin coating, a polyimide coating, and the like. By using the method of spraying insulating paint, the manufacturing efficiency of the fixing row 400 can be improved, and the second connecting sheet 430 of different shapes can be adapted, and the surface of the second connecting sheet 430 can be covered to the maximum extent to increase the insulating shielding area.

[0075] In some embodiments, please refer to Figure 8 and Figure 9 The insulating piece 450 comprises a top wall 451 and a peripheral wall 452 connected with each other, the top wall 451 and the peripheral wall 452 enclose a receiving groove, the second connecting sheet 430 is received in the receiving groove, and the edge of the second connecting sheet 430 is in interference fit with the peripheral wall 452. Specifically, the top wall 451 is adapted in shape to the fourth surface 432, so that the insulating piece 450 can cover the fourth surface 432; the peripheral wall 452 is connected to the outer edge of the top wall 451, and the peripheral wall 452 is connected with the edge of the second connecting sheet 430.

[0076] In specific embodiments, the second connecting piece 430 can be designed as a quadrilateral, one side of which is connected to the main body 410; the outer peripheral wall 452 of the insulating piece 450 is designed as a “N” shape, which can cover three sides of the second connecting piece 430 that are not connected to the main body 410, thereby achieving insulation and protection of the edges of the second connecting piece 430. Alternatively, the size of the insulating piece 450 can be slightly smaller than the second connecting piece 430, so that the edges of the two form an interference fit, so that the second connecting piece 430 and the insulating piece 450 can be connected without additional components. In other embodiments, the second connecting piece 430 can also be designed as a “concave” shape. The end of the second connecting piece 430 away from the main body 410 in the first direction 001 has a notch, which can reduce the weight of the second connecting piece 430.

[0077] In specific embodiments, the outer peripheral wall 452 of the insulating piece 450 is provided with an assembly groove 453 on the side facing the second connecting piece 430, and the width of the assembly groove 453 is matched with the thickness of the second connecting piece 430; the edge of the second connecting piece 430 can extend into the assembly groove 453, so as to clamp and fix the insulating piece 450 on the second connecting piece 430, avoiding relative displacement between the two. Alternatively, the extension shape of the assembly groove 453 is designed as a “N” shape, which is matched with the shape of the outer peripheral wall 452 of the insulating piece 450. During assembly, the notch of the insulating piece 450 can be first abutted with the edge of the second connecting piece 430, and then the edge of the second connecting piece 430 can be clamped into the assembly groove 453, so as to complete the assembly and alignment of the insulating piece 450 and the second connecting piece 430 by sliding.

[0078] In specific embodiments, the insulating piece 450 is provided with a second matching hole 454, which is arranged corresponding to the second fixing hole 431A, avoiding shielding the second fixing hole 431A. The fixing strap or other accessories of the wire harness can pass through the second matching hole 454 and the second fixing hole 431A to complete the fixing of the wire harness. Alternatively, the aperture of the second matching hole 454 can be larger than the second fixing hole 431A, so as to ensure that the second fixing hole 431A can be completely exposed through the second matching hole 454, preventing the top wall 451 of the insulating piece 450 from shielding part of the second fixing hole 431A.

[0079] In specific embodiments, in the third direction 003, the outer peripheral wall 452 of the insulating piece 450 has a width slightly greater than the thickness of the second connecting piece 430. The width of the outer peripheral wall 452 refers to its thickness in the third direction 003 after being mounted on the second connecting piece 430, which can also be the depth of the assembly groove 453. In this way, the outer peripheral wall 452 can protrude from the back surface of the second connecting piece 430 (the surface facing away from the fourth surface 432). When the wire harness needs to be fixed to the back surface of the fourth surface 432, due to the wider width of the outer peripheral wall 452, the wire harness will not directly contact the back surface of the second connecting piece 430 under the restriction of the outer peripheral wall 452, and there is a certain gap between the wire harness and the back surface of the second connecting piece 430, thereby avoiding the case where the back surface of the second connecting piece 430 directly connects the wire harness.

[0080] In some embodiments, please refer to Figure 11 , along the first direction 001, the length of the first connecting piece 420 is A1, and the length of the second connecting piece 430 is A2, and the fixing row 400 satisfies: A1

[0081] In specific embodiments, the specific roles of the first connecting piece 420 and the second connecting piece 430 are different, so if they are confused during assembly and the fixing row 400 is installed upside down, it will cause the wire harness to be unable to be effectively fixed, the fixing row 400 to fail to be connected to the fixing end plate 300, and even damage the components. Therefore, the first connecting piece 420 and the second connecting piece 430 are provided with size differences, one of the core roles of which is to realize assembly foolproofing and eliminate the risk of installing the fixing row 400 upside down from a structural perspective.

[0082] In specific embodiments, the larger surface area of the second connecting piece 430 also improves its supporting capacity, which not only can adapt to the centralized fixing of more strands of wire harnesses, or provide a more sufficient contact support surface for thicker wire harnesses to avoid damage to the insulation layer of the wire harness due to excessive local stress; but also can increase the number and spacing of the second fixing portions 431 (such as the second fixing holes 431A), so that the arrangement of the wire harnesses is more regular, reducing the extrusion and entanglement between the wire harnesses, and further reducing the risk of interference.

[0083] In some embodiments, please refer to Figure 11 , when the first fixing hole 421A is circular, along the first direction 001, the distance from the center of the first fixing hole 421A to the first surface 411 is C1, and the maximum distance from the center of the first fixing hole 421A to the surface of the fixing end plate 300 facing the first surface 411 is C2, and the fixing row 400 satisfies: 1.1

[0084] In specific embodiments, a reasonable gap is ensured between the first surface 411 of the fixing row 400 and the fixing end plate 300, avoiding assembly interference caused by close contact between the two, reducing vibration friction between the fixing row and the fixing end plate, and reducing the risk of component wear. At the same time, the proportional constraint can effectively control the distance between the fixing row 400 and the fixing end plate 300, and avoid the fixing row 400 from occupying the installation space of the low-voltage electric control components at the rear end due to excessive distance from the fixing end plate 300.

[0085] In some embodiments, referring to Figure 11 , along the first direction 001, the distance from the center of the first fixing hole 421A to the first connecting piece 420 away from the first surface 411 is C3, the maximum distance from the center of the first matching hole 310 to the surface of the fixing end plate 300 facing away from the first surface 411 is C4, and the fixing row 400 satisfies: 0

[0086] In specific embodiments, satisfying the above relationship can avoid the end of the first connecting piece 420 exceeding the fixing end plate 300, and then being held to the battery cell 200 located at the rear end of the fixing end plate. When C3 / C4=1, the end of the first connecting piece 420 is flush with the surface of the fixing end plate 300 facing away from the first surface 411, which maximizes the use of the length of the connecting piece to ensure connection stability, and does not exceed the fixing end plate, achieving a balance between protection and function; when C3 / C4<1, the end of the first connecting piece 420 is recessed inside the fixing end plate 300, and a certain safety gap is reserved between the connecting piece and the battery cell, which can effectively avoid the connecting piece contacting the battery cell 200 even if there is assembly error or vibration displacement, and the protection effect is more sufficient.

[0087] In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like refer to the orientation or positional relationship based on the drawings. They are only used to facilitate the description of the present application and simplify the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0088] The above disclosure is only a preferred embodiment of the present application, and of course cannot limit the scope of the present application. Those skilled in the art can understand that the above-mentioned processes can be implemented in whole or in part, and equivalent changes made in accordance with the claims of the present application still fall within the scope of the present application.

Claims

1. A fixed row, characterized in that, include: The main body (410) includes a first surface (411) and a second surface (412) that are opposite to each other along a first direction (001), the main body (410) extending along a second direction (002), the first direction (001) and the second direction (002) intersecting; A first connecting piece (420) connects to the main body (410) and protrudes from the first surface (411). The first connecting piece (420) has a first fixing part (421). The first connecting piece (420) connects two battery modules (20) arranged along the second direction (002) through the first fixing part (421). The second connecting piece (430) connects to the main body (410) and protrudes from the second surface (412). The second connecting piece (430) has a second fixing part (431). The second connecting piece (430) connects to the wiring harness of the battery module (20) through the second fixing part (431).

2. The fixed row according to claim 1, characterized in that, The second connecting piece (430) and the first connecting piece (420) are located on the same side of the main body (410) along the second direction (002). The first connecting piece (420) and the second connecting piece (430) are spaced apart along the second direction (002). The main body (410), the first connecting piece (420) and the second connecting piece (430) are an integral structure. The second connecting piece (430) and the first connecting piece (420) are both bent relative to the main body (410).

3. The fixed row according to claim 2, characterized in that, The main body (410) includes a first edge (410A) and a second edge (410B) that are opposite to each other along a third direction (003). The first connecting piece (420) and the second connecting piece (430) are connected to the first edge (410A). The first edge (410A) is provided with a relief groove (440), which is located between the first connecting piece (420) and the second connecting piece (430). The third direction (003) intersects with the first direction (001) and the second direction (002).

4. The fixed row according to claim 3, characterized in that, The clearance groove (440) includes a first clearance groove (441) and a second clearance groove (442) spaced apart. Along the second direction (002), the diameter of the first clearance groove (441) is larger than the diameter of the second clearance groove (442). Along the third direction (003), the bottom wall of the first clearance groove (441) is lower than the bottom wall of the second clearance groove (442).

5. The fixed row according to claim 3, characterized in that, The first connecting piece (420) includes a third surface (422) facing away from the main body (410), and the second connecting piece (430) includes a fourth surface (432) facing away from the main body (410). Along the third direction (003), the fourth surface (432) is higher than the third surface (422).

6. The fixed row according to claim 5, characterized in that, The first edge (410A) includes a fifth surface (415) facing away from the second edge (410B), and along the third direction (003), the fifth surface (415) is higher than the third surface (422), and the fourth surface (432) is higher than the fifth surface (415).

7. The fixed row according to any one of claims 1-6, characterized in that, The first fixing part (421) includes a plurality of first fixing holes (421A), at least two of the first fixing holes (421A) are spaced apart along the second direction (002), the fixing row (400) is used to fix two adjacent fixing end plates (300), the fixing end plate (300) includes a first mating hole (310), and the first fixing hole (421A) is used to be arranged opposite to the first mating hole (310).

8. The fixed row according to claim 7, characterized in that, The second fixing part (431) includes a plurality of second fixing holes (431A), which are arranged in an array. The diameter of the second fixing hole (431A) is smaller than the diameter of the first fixing hole (421A).

9. The fixed row according to claim 7, characterized in that, Along the first direction (001), the distance from the center of the first fixing hole (421A) to the first surface (411) is C1, the maximum distance from the center of the first mating hole (310) to the surface of the fixing end plate (300) facing the first surface (411) is C2, and the fixing row (400) satisfies: 1.1≤C1 / C2≤2.

10. The fixed row according to claim 7, characterized in that, Along the first direction (001), the distance from the center of the first fixing hole (421A) to the first connecting piece (420) away from the first surface (411) is C3, the maximum distance from the center of the first mating hole (310) to the surface of the fixing end plate (300) facing away from the first surface (411) is C4, and the fixing row (400) satisfies: 0 < C3 / C4 ≤ 1.

11. The fixed row according to any one of claims 1-6, characterized in that, The number of the first connecting pieces (420) is n, n≥2, and the n first connecting pieces (420) are arranged at intervals along the second direction (002). The number of the second connecting pieces (430) is m, m≤n, and the second connecting pieces (430) are arranged between two adjacent first connecting pieces (420).

12. The fixed row according to any one of claims 1-6, characterized in that, The fixed row (400) also includes an insulating member (450), which connects the second connecting piece (430) to the surface of the main body (410) opposite to the second connecting piece (430), and the insulating member (450) and the second connecting piece (430) are detachably connected.

13. The fixed row according to claim 12, characterized in that, The insulating member (450) includes a top wall (451) and an outer peripheral wall (452) connected to each other, the top wall (451) and the outer peripheral wall (452) enclosing a receiving groove, and the second connecting piece (430) is received in the receiving groove.

14. The fixed row according to any one of claims 1-6, characterized in that, Along the first direction (001), the length of the first connecting piece (420) is A1, the length of the second connecting piece (430) is A2, and the fixed row (400) satisfies: A1 < A2; and / or, along the second direction (002), the width of the first connecting piece (420) is B1, the width of the second connecting piece (430) is B2, and the fixed row (400) satisfies: B1 < B2.

15. A battery pack, characterized in that, It includes at least two battery modules (20) and a fixed row (400) as described in any one of claims 1-14, wherein the battery module (20) includes a fixed end plate (300) and the fixed row (400) connects the fixed end plates (300) of two adjacent battery modules (20).

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