Battery pack

Abstract

The utility model relates to the technical field of batteries, and discloses a battery pack, which comprises a box body, a plurality of battery packs are arranged in the box body, a support beam is arranged between two adjacent battery packs along a first direction, the support beam extends along a second direction, and the second direction is perpendicular to the first direction. And the box cover covers the box body. And the fixed support is arranged on the side, facing the box cover, of the supporting beam, and the fixed support and the supporting beam are relatively fixed. And the high-voltage conducting bar is arranged on the side, facing the box cover, of the supporting beam, extends in the second direction, and penetrates through and is fixed to the fixing support in the second direction. The first supporting pad is arranged on the side, facing the box cover, of the fixing support, and the distance between the first supporting pad and the inner surface of the box cover is 0-6 mm. According to the battery pack, the box cover can be prevented from colliding with the high-voltage conducting bar, so that the high-voltage conducting bar is protected from being damaged.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery pack. Background Technology

[0002] During the production and assembly of battery packs, high-voltage busbars are usually installed inside the battery pack housing. These high-voltage busbars can be used to make electrical connections with the positive and negative terminals of the battery pack, as well as with the distribution box, to facilitate the normal operation of the battery pack.

[0003] Currently, high-voltage busbars are generally installed on beams inside the enclosure. Since the high-voltage busbars have a certain height, when the enclosure cover is closed, it will inevitably deform under external impact, which will then collide with the high-voltage busbars inside the enclosure, causing damage to the high-voltage busbars. Utility Model Content

[0004] This invention provides a battery pack that avoids collisions between the cover and the high-voltage conductor, thus protecting the high-voltage conductor from damage.

[0005] This utility model provides a battery pack, comprising:

[0006] The enclosure contains multiple battery packs. A support beam is provided between two adjacent battery packs along a first direction. The support beam extends along a second direction, which is perpendicular to the first direction.

[0007] A lid that closes to the box body;

[0008] A fixed support is provided on the side of the support beam facing the box cover, and the fixed support is fixed relative to the support beam;

[0009] A high-voltage conductive busbar is disposed on the side of the support beam facing the box cover. The high-voltage conductive busbar extends along the second direction and passes through and is fixed to the fixed bracket along the second direction.

[0010] A first support pad is disposed on the side of the fixed support facing the box cover, and the distance between the first support pad and the inner surface of the box cover is 0-6mm.

[0011] The battery pack provided by this utility model has a fixed support on the support beam, and a first support pad is provided on the fixed support. The high-voltage conductor is passed through and fixed to the fixed support. The distance between the first support pad and the cover is small. When the cover is impacted and dents downward, the cover contacts the first support pad first. The first support pad can absorb the impact from the cover, thereby eliminating most of the impact from the cover and preventing the cover from colliding with the high-voltage conductor, so as to protect the high-voltage conductor from damage. Attached Figure Description

[0012] Figure 1 This is a cross-sectional structural diagram of a battery pack in an embodiment of the present invention;

[0013] Figure 2 This is a partial structural diagram of the battery pack in an embodiment of the present invention;

[0014] Figure 3 This is an exploded structural diagram of the fixed support and the first support pad in an embodiment of this utility model;

[0015] Figure 4 This is a schematic diagram of the structure of the seat in one embodiment of the present utility model;

[0016] Figure 5 This is a schematic diagram of a structure in which multiple fixed supports are provided on the support beam in an embodiment of this utility model.

[0017] In the picture:

[0018] 100-Box body; 200-Box cover; 300-Battery pack; 400-Support beam; 500-High voltage conductor busbar; 510-Copper busbar; 600-Fixed support; 610-Base; 611-Fixed groove; 6111-Protrusion; 612-Limiting groove; 613-Limiting block; 614-Hook; 615-Support part; 620-Top cover; 621-Hanging ear; 622-Limiting hole; 700-First support pad; 800-Second support pad. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] refer to Figure 1 The battery pack in this embodiment of the present invention may include a housing 100 and a cover 200. The housing 100 has an internal space for accommodating the battery pack 300. The cover 200 can be closed onto the housing 100, so that the interior of the housing 100 is relatively closed, preventing damage to the battery pack 300 inside the housing 100.

[0021] Please refer to the above. Figure 1 and Figure 2The battery packs 300 arranged inside the housing 100 can be spaced apart along a first direction. The housing 100 also has multiple support beams 400 arranged along the first direction, with each support beam 400 located between adjacent battery packs 300. Each support beam 400 extends along a second direction, which is perpendicular to the first direction. In this case, the first and second directions can be considered as the length and width directions of the housing 100.

[0022] A high-voltage conductive busbar 500 is provided on the side of the support beam 400 facing the housing 100. The high-voltage conductive busbar 500 extends along a second direction and is used for electrical connection with the positive and negative terminals of the battery pack 300. A fixed support 600 is also provided on the side of the support beam 400 facing the housing 100. The fixed support 600 is fixed relative to the support beam 400. The high-voltage conductive busbar 500 can pass through the fixed support 600 along the second direction and is fixedly connected to the fixed support 600.

[0023] A first support pad 700 is also provided on the side of the fixed support 600 facing the cover 200. The surface of the first support pad 700 facing the cover 200 is higher than the surface of the high voltage busbar 500 facing the cover 200. In addition, the distance between the first support pad 700 and the inner surface of the cover 200 is 0-6mm.

[0024] In this embodiment, a fixed support 600 and a first support pad 700 are provided, and the high-voltage conductive bus 500 is fixed on the fixed support 600. Generally, the distance between the support beam 400 and the inner surface of the cover 200 is 20mm to 50mm, and the distance between the first support pad 700 and the inner surface of the cover 200 is 0mm to 6mm, that is, the distance between the first support pad 700 and the cover 200 is relatively small. When the cover 200 is deformed by an external force, the cover 200 first contacts the first support pad 700, which can play a buffering role. The force on the first support pad 700 is only transmitted to the fixed support 600 and not to the high-voltage conductive bus 500. During this process, there will be no collision between the cover 200 and the high-voltage conductive bus 500, thereby protecting the high-voltage conductive bus 500. When the distance between the first support pad 700 and the box cover 200 is 0, the first support pad 700 can abut against the inner surface of the box cover 200. At this time, the first support pad 700 can also support the box cover 200. At the same time, the force exerted by the box cover 200 on the first support pad 700 can also press against the fixed support 600, so that the fixed support 600 itself remains stable.

[0025] In some embodiments, continue to refer to Figure 1A second support pad 800 is also provided on the side of the battery pack 300 facing the cover 200. The thickness of the second support pad 800 is less than the thickness of the first support pad 700. The distance between the second support pad 800 and the inner surface of the cover 200 can be equal to the distance between the first support pad 700 and the inner surface of the cover 200. When the cover 200 deforms and simultaneously comes into contact with the first support pad 700 and the second support pad 800, both the first support pad 700 and the second support pad 800 can undergo elastic deformation. Because the first support pad 700 is thicker, it can absorb more impact force from the cover 200. After the first support pad 700 absorbs the impact force from the cover 200, the remaining impact force is transmitted to the fixed support 600, thereby reducing the impact force on the fixed support 600.

[0026] It is worth mentioning that the thickness of the first support pad 700 can be understood as the dimension of the first support pad 700 along a third direction, which is the arrangement direction of the cover 200 and the body 100. The third direction is perpendicular to the first direction and perpendicular to the second direction.

[0027] In practice, the thickness of the first support pad 700 can be between 3mm and 10mm. It is understandable that designing the thickness of the first support pad 700 within this range serves two purposes: firstly, the thickness of the first support pad 700 is not too thin, allowing it to adequately absorb the impact force from the lid 200; secondly, the thickness of the first support pad 700 is not too thick, thus preventing the portion of the first support pad 700 near the lid 200 from shifting horizontally relative to its portion near the fixed support 600 when the lid 200 expands, thereby ensuring it provides adequate cushioning.

[0028] The thickness of the second support pad 800 can be 0 to 7 mm to ensure that the second support pad 800 can provide good protection for the battery pack 300.

[0029] Furthermore, the elastic modulus of the first support pad 700 can be between 0.02 MPa and 8 MPa. This means the first support pad 700 has a relatively low elastic modulus, making it more prone to elastic deformation. This allows it to better absorb the impact force from the cover 200, thereby reducing the impact force of the cover 200 on the fixed support 600. Similarly, the elastic modulus of the second support pad 800 can also be between 0.02 MPa and 8 MPa, to better absorb the impact force from the cover 200, thereby reducing the impact force of the cover 200 on the battery pack 300.

[0030] Based on this, the material of the first support pad 700 may include at least one of modified polypropylene, chloroprene rubber, polyurethane, and ethylene-vinyl acetate copolymer, and the material of the second support pad 800 may also include at least one of modified polypropylene, chloroprene rubber, polyurethane, and ethylene-vinyl acetate copolymer.

[0031] In some embodiments, such as Figure 2 As shown, the high-voltage conductive bus 500 includes two copper busbars 510, which are spaced apart along the first direction and respectively fixed on the fixed support 600.

[0032] Please refer to the above. Figure 2 and Figure 3 The fixed support 600 may include a base 610 and a top cover 620, wherein the base 610 is used to fix to the support beam 400, the top cover 620 is fixedly connected to the side of the base 610 away from the support beam 400, and the copper busbar 510 passes through the base 610 along the second direction.

[0033] Please refer to the above. Figure 3 and Figure 4 The base 610 is provided with two fixing grooves 611, which extend through the base 610 along the second direction. Two copper busbars 510 are respectively inserted into the two fixing grooves 611. The two side walls of the fixing grooves 611 along the first direction can be provided with protrusions 6111. Correspondingly, the copper busbars 510 can be provided in the grooves (not shown in the figure) corresponding to the protrusions 6111. When the copper busbars 510 are inserted into the fixing grooves 6111, the protrusions 6111 can be engaged in the grooves so that the copper busbars 510 are relatively fixed to the fixing support 600.

[0034] There can be multiple protrusions 6111, and the multiple protrusions 6111 are spaced apart along the second direction so that there is a larger snap-fit ​​area between the copper busbar 510 and the fixing groove 611, thereby improving the fixing effect between the two.

[0035] Furthermore, when the copper busbar 510 passes through the fixing groove 611, the side of the copper busbar 510 facing the support beam 400 can also contact the bottom of the fixing groove 611, so that the bottom of the fixing groove 611 can support the copper busbar 510. Here, it can be understood that in this embodiment, the copper busbar 510 and the support beam 400 are spaced apart in a third direction. That is to say, the copper busbar 510 and the support beam 400 do not contact each other, but are relatively fixed to the support beam 400 by being fixed to the fixing support 600.

[0036] The connection between the top cover 620 and the base 610 is, for example, a detachable connection. (See also...) Figure 3 The base 610 may be provided with limiting grooves 612 on both sides opposite to each other along the first direction. The limiting grooves 612 have openings at both ends along the third direction. Limiting blocks 613 are also provided in the limiting grooves 612. The top cover 620 is provided with hanging ears 621 on both sides opposite to each other along the first direction. The middle of the hanging ears 621 is provided with a limiting hole 622. The limiting hole 622 may be a strip-shaped limiting hole and extends along the third direction.

[0037] When assembling the top cover 620 and the base 610, the top cover 620 and the base 610 can be in contact with the side surface of the top cover 620 facing the top cover 620, the hanging ear 621 is located in the limiting groove 612, and the limiting block 613 is located in the limiting hole 622.

[0038] In this embodiment, the width of the limiting groove 612 (i.e., the dimension of the limiting groove 612 along the second direction) is the same as the width of the hanging ear 621. That is, when the hanging ear 621 is located in the limiting groove 612, the two sides of the hanging ear 621 abut against the two inner walls of the limiting groove 612 respectively, so that the limiting grooves 612 on both sides cooperate to limit the upper cover 620 in the first and second directions. In addition, the limiting block 613 abuts against the bottom of the limiting hole 622, so that the limiting block 613 limits the upper cover 620 in the third direction. In this way, the upper cover 620 and the base 610 can remain relatively fixed after assembly.

[0039] A guide surface can also be provided on the side of the limiting block 613 facing the upper cover. This guide surface can be used to guide the hanging ear 621 when it moves from top to bottom in the limiting groove 612, so that the limiting block 613 can be more easily inserted into the limiting hole 613.

[0040] Based on this, the first support pad 700 can be disposed on the side of the upper cover 620 away from the seat 610. For example, the first support pad 700 can be fixed to the surface of the upper cover 620 by adhesive bonding.

[0041] When the copper busbar 510 is inserted into the fixing groove 611, the surface of the copper busbar 510 facing the cover 200 can be slightly lower than the surface of the base 610 facing the cover 200. When the first support pad 700 is subjected to an impact force from the cover 200, the impact force can be transmitted from the first support pad 700 to the upper cover 620, and then from the upper cover 620 to the base 610. Since the surface of the copper busbar 510 is lower than the surface of the base 610, the copper busbar 510 does not contact the upper cover 620, thus preventing the copper busbar 510 from directly receiving the impact force transmitted from the upper cover 620, thereby better protecting the copper busbar 510.

[0042] In some embodiments, refer again Figure 1The distance between the upper cover 620 and the inner surface of the box cover 200 is 0-6mm. Based on this, due to the small distance between the upper cover 620 and the box cover 200, when the first support pad 700 is fixed to the surface of the upper cover 620 and the box cover 200 is closed onto the box body 100, the first support pad 700 can be in a compressed and deformed state. At this time, the first support pad 700 and the box cover 200 are in contact, and the first support pad 700 provides support to the box cover 200. Furthermore, the box cover 200 also exerts a reaction force on the first support pad 700, allowing the box cover 200 to press against the fish fixing support 600, making the fixing support 600 more stable.

[0043] To ensure that the fixed support 600 and the support beam 400 remain relatively fixed, as an optional implementation scheme, refer again... Figure 2 and Figure 3 The support beam 400 has a mounting groove (not shown in the figure) on the side facing the fixed support 600. The shape of the mounting groove can be adapted to the shape of the base 610. Specifically, the base 610 has a hook 614 protruding from the surface of the base 610 on the side facing the support beam 400. There are at least two hooks 614, and the hooks 614 are located on different sides of the base 610. A snap-fit ​​structure corresponding to the hook 614 can be provided in the mounting groove. When the base 610 is installed in the mounting groove, the hook 614 engages with the snap-fit ​​structure, thereby fixing the fixed support 600 and the support beam 400 relative to each other in the third direction.

[0044] A portion of the base 610 can also be embedded in the mounting groove so that each surface of the base 610 abuts against the inner wall of the mounting groove, thereby achieving relative fixation between the fixed support 600 and the support beam 400 in the first direction and the second direction.

[0045] Additionally, a support portion 615 may be provided on the side of the base 610 facing the support beam 400. The support portion 615 may be located at the center of the base 610 and protrude from the surface of the base 610 opposite to the upper cover 620. When a portion of the base 610 is embedded in the mounting groove, the support portion 615 may abut against the bottom of the mounting groove, thereby increasing the contact area between the base 610 and the mounting groove and improving the stability of the fixed support 600.

[0046] In some embodiments, the dimension L1 of the first support pad 700 along the first direction and the distance L2 between the two copper busbars 510 can satisfy the following condition: L1 > (3~5)L2, that is, the width of the first support pad 700 is greater than three to five times the distance between the copper busbars 510. At this time, since the width of the first support pad 700 is sufficient, the first support pad 700 extends beyond the copper busbars 510 on both sides along the first direction. When the cover 200 is impacted and dented, the cover 200 cannot contact the copper busbars 510.

[0047] Based on this, the spacing between the two copper busbars 510 can be 3mm to 10mm, and correspondingly, the dimension of the first support pad 700 along the first direction can be 15mm to 30mm.

[0048] In some embodiments, reference Figure 5 Multiple fixed supports 600 can be provided on a support beam 400, and the multiple fixed supports 600 can be spaced apart along a second direction. A copper busbar 510 can pass through each fixed support 600 along the second direction, and each fixed support 600 is provided with a first support pad 700 to ensure balanced force between the first support pad 700 and the cover 200, preventing severe local deformation of the cover 200. Furthermore, it can be understood that by providing multiple fixed supports 600, the fixing effect of the copper busbar 510 is improved.

[0049] In practice, among the multiple fixed supports 600 installed on a support beam 400, the spacing between two adjacent fixed supports 600 can be 150mm to 250mm. While achieving the effect of fixing the copper busbar 510, the number of fixed supports 600 can also be controlled to improve assembly efficiency.

[0050] Obviously, those skilled in the art can make various modifications and variations to the embodiments of this utility model without departing from the spirit and scope of this utility model. Therefore, if these modifications and variations of this utility model fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A battery pack, characterized in that, include: The enclosure contains multiple battery packs. A support beam is provided between two adjacent battery packs along a first direction. The support beam extends along a second direction, which is perpendicular to the first direction. A lid that closes to the box body; A fixed support is provided on the side of the support beam facing the box cover, and the fixed support is fixed relative to the support beam; A high-voltage conductive busbar is disposed on the side of the support beam facing the box cover. The high-voltage conductive busbar extends along the second direction and passes through and is fixed to the fixed bracket along the second direction. A first support pad is disposed on the side of the fixed support facing the box cover, and the distance between the first support pad and the inner surface of the box cover is 0-6mm.

2. The battery pack according to claim 1, characterized in that, It also includes a second support pad, which is disposed on the side of the battery pack facing the cover; The thickness of the first support pad is greater than the thickness of the second support pad.

3. The battery pack according to claim 2, characterized in that, The thickness of the first support pad is 3mm to 10mm, and the thickness of the second support pad is 0mm to 7mm.

4. The battery pack according to claim 2 or 3, characterized in that, The elastic modulus of the first support pad is 0.02 MPa to 8 MPa, and the elastic modulus of the second support pad is 0.02 MPa to 8 MPa.

5. The battery pack according to claim 2, characterized in that, The material of the first support pad includes at least one of modified polypropylene, neoprene rubber, polyurethane, and ethylene-vinyl acetate copolymer; The material of the second support pad includes at least one of modified polypropylene, neoprene rubber, polyurethane, and ethylene-vinyl acetate copolymer.

6. The battery pack according to claim 1, characterized in that, Along a third direction, the high-voltage conductive busbar and the support beam are spaced apart. The third direction is the arrangement direction of the cover and the box body. The third direction is perpendicular to the first direction and perpendicular to the second direction.

7. The battery pack according to claim 1, characterized in that, The fixed support is used to set the distance between the surface of the first support pad and the inner surface of the box cover to be 0-6mm.

8. The battery pack according to claim 1, characterized in that, The high-voltage conductive busbar includes two copper busbars, which are spaced apart along the first direction. The dimension L1 of the first support pad along the first direction and the distance L2 between the two copper busbars satisfy the following condition: L1 > (3~5)L2.

9. The battery pack according to claim 8, characterized in that, The distance between the two copper busbars is 3mm to 10mm, and the dimension of the first support pad along the first direction is 15mm to 30mm.

10. The battery pack according to claim 1, characterized in that, Each of the support beams is provided with a plurality of fixed supports, and each of the fixed supports is provided with the first support pad on the side facing the box cover; In the plurality of fixed supports provided for a support beam, the distance between two adjacent fixed supports is 150mm to 250mm.

11. The battery pack according to claim 1, characterized in that, The first support pad is bonded to the fixed support.

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