Battery pack

Abstract

The utility model relates to the technical field of batteries, in particular to a battery pack. A box body of the battery pack comprises a plurality of first beams and a plurality of second beams, and the plurality of first beams and the plurality of second beams are matched to define a containing cavity; the first beam comprises at least two first rib plates distributed in the first direction at intervals and at least two second rib plates distributed in the second direction at intervals. The battery pack further comprises an adapter, a main body part of the adapter is connected with the second beam, the first connecting part is in contact with the at least one first rib plate or the at least one second rib plate, and the size of the main body part in the first direction is larger than that of the first connecting part in the first direction. And the first fixing piece of the battery pack is locked on the first connecting part and the first rib plate which are contacted with each other or the first connecting part and the second rib plate which are contacted with each other. In this way, the torsional strength and the connecting strength between the first beam and the second beam can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and particularly relates to a battery pack. Background Art

[0002] Currently, most of the box frames of battery packs are formed by welding. The thermal stress and thermal deformation generated by welding have a great impact on the overall structural strength of the box frame, and it is difficult to detect the influence of thermal stress and thermal deformation on the structural strength of the box based on current detection means. There is also a splicing design for the box frame of the battery pack, where the beams of the box are spliced through fasteners to replace the welding process, thereby better ensuring the overall structural strength of the box frame. However, currently, the battery pack box with a splicing design has the problem of low structural torsional strength. Summary of the Utility Model

[0003] The present application provides a battery pack, which can improve the torsional strength and connection strength between the first beam and the second beam.

[0004] The present application provides a battery pack. The battery pack has an intersecting first direction and a second direction. The battery pack includes a box body, and the box body includes a plurality of first beams and a plurality of second beams. The extending directions of the first beams, the extending directions of the second beams, and the first direction intersect pairwise, and the second direction is parallel to the extending direction of the second beams; the plurality of first beams and the plurality of second beams cooperate to enclose a receiving cavity; wherein, the first beam includes at least two first rib plates spaced along the first direction and at least two second rib plates spaced along the second direction, and each first rib plate is connected between two adjacent second rib plates. The battery pack further includes an adapter, the adapter includes a connected main body portion and a first connection portion, and the arranging direction of the main body portion and the first connection portion intersects with the first direction; the main body portion is connected to the second beam, the first connection portion contacts at least one first rib plate, and the size of the main body portion in the first direction is greater than the size of the first connection portion in the first direction. The battery pack further includes a first fixing member, and the first fixing member is locked to the contacting first connection portion and the first rib plate. The battery pack further includes a single battery, and the single battery is disposed in the receiving cavity.

[0005] In an embodiment of the present application, the at least two first rib plates include a first sub-rib plate, a second sub-rib plate, and a third sub-rib plate spaced along the first direction. The second sub-rib plate is located between the first sub-rib plate and the third sub-rib plate, and the first sub-rib plate, the second sub-rib plate, and the third sub-rib plate are all connected between two adjacent second rib plates; wherein, the second sub-rib plate contacts the first connection portion, and the first fixing member is locked to the contacting first connection portion and the second sub-rib plate.

[0006] In an embodiment of the present application, the first fixing member includes: a first fixing portion connected to the first connecting portion; and a second fixing portion connected to an end of the first fixing portion. The second fixing portion is located on a side of the second sub-rib plate facing away from the first connecting portion, and the second fixing portion abuts against a surface of the second sub-rib plate facing away from the first connecting portion. The first fixing portion and the second fixing portion cooperate to fix the first connecting portion and the second sub-rib plate in contact with each other.

[0007] In an embodiment of the present application, the battery pack further includes a second fixing member. The first sub-rib plate and the main body portion are fixedly connected through the second fixing member. The first sub-rib plate is provided with a first avoidance hole which is disposed opposite to the first connecting portion. The first avoidance hole is configured to allow the first fixing member to pass through so that the first fixing member is locked to the first connecting portion and the second sub-rib plate.

[0008] In an embodiment of the present application, the adapter further includes a second connecting portion. The first connecting portion and the second connecting portion are respectively connected to opposite sides of the main body portion, and the arrangement directions of the first connecting portion and the second connecting portion are parallel to the extending direction of the first beam. The main body portion is connected to the second beam through the second connecting portion.

[0009] In an embodiment of the present application, the second connecting portion is connected to a side of the second beam away from the first beam; and / or the second connecting portion is connected to a side of the second beam close to the first beam.

[0010] In an embodiment of the present application, the battery pack further includes a reinforcing member, a second fixing member, and a third fixing member. The reinforcing member, the first rib plate, and the main body portion are fixedly connected through the second fixing member, and the reinforcing member and the second beam are fixedly connected through the third fixing member. Correspondingly, the present application further provides a battery pack. The battery pack has an intersecting first direction and a second direction. The battery pack includes: a box body including a plurality of first beams and a plurality of second beams. The extending directions of the first beams, the extending directions of the second beams, and the first direction intersect pairwise, and the second direction is parallel to the extending direction of the second beam; the plurality of first beams and the plurality of second beams cooperate to enclose an accommodation cavity; wherein, the first beam includes at least two first rib plates spaced apart along the first direction and at least two second rib plates spaced apart along the second direction, and each first rib plate is connected between two adjacent second rib plates; an adapter including a connected main body portion and a first connecting portion, the arrangement direction of the main body portion and the first connecting portion intersects with the first direction; the main body portion is connected to the second beam, the first connecting portion is in contact with at least one second rib plate, wherein the dimension of the main body portion in the first direction is greater than the dimension of the first connecting portion in the first direction; a first fixing member locked to the first connecting portion and the second rib plate in contact; and a single battery disposed in the accommodation cavity.

[0011] In an embodiment of the present application, each second rib plate is in contact with the first connecting portion, and each second rib plate and the first connecting portion are locked through the first fixing member.

[0012] In one embodiment of the present application, the first fixing member includes: a first fixing portion, connected to the first connecting portion; and a second fixing portion, connected to the end of the first fixing portion, the second fixing portion is located on the side of the second rib plate facing away from the first connecting portion, and the second fixing portion abuts against the surface of the second rib plate facing away from the first connecting portion, and the first fixing portion and the second fixing portion cooperate to fix the contacting first connecting portion and the second rib plate.

[0013] In one embodiment of the present application, at least two second ribs include at least two fifth sub-ribs spaced apart along the second direction and a sixth sub-rib located between two adjacent fifth sub-ribs, and the fifth sub-rib and the sixth sub-rib are both connected between two adjacent first ribs; wherein the sixth sub-rib is in contact with the first connecting portion, and the first fixing member is locked to the contacting first connecting portion and the sixth sub-rib.

[0014] In one embodiment of the present application, the first fixing member includes: a first fixing portion, connected to the first connecting portion; and a second fixing portion, connected to the end of the first fixing portion, the second fixing portion is located on the side of the sixth sub-rib plate facing away from the first connecting portion, and the second fixing portion abuts against the surface of the sixth sub-rib plate facing away from the first connecting portion, and the first fixing portion and the second fixing portion cooperate to fix the contacting first connecting portion and the sixth sub-rib plate.

[0015] In one embodiment of the present application, the fifth sub-rib plate is provided with a second avoidance hole, which is arranged opposite to the first connecting portion, and the second avoidance hole is configured for the first fixing member to pass through so that the first fixing member is locked to the first connecting portion and the sixth sub-rib plate.

[0016] The beneficial effect of the present application is that, different from the prior art, the present application provides a battery pack. The box of the battery pack includes a plurality of first beams and a plurality of second beams, and the plurality of first beams and the plurality of second beams are spliced ​​by adapters, replacing the welding process of the prior art, which is conducive to ensuring the overall structural strength of the box.

[0017] The adapter of the present application includes a main body and a first connecting part connected to each other, the main body is connected to the second beam, and the first connecting part is connected to the rib plate of the first beam. The size of the main body in the first direction is larger than the size of the first connecting part in the first direction, so that the adapter presents a stepped structure as a whole. In this way, when relative torsion occurs between the first beam and the second beam, the main body and the first connecting part respectively apply forces to the first beam, and the points of action of the forces applied by the main body and the first connecting part are different, thereby being able to improve the torsional strength between the first beam and the second beam.

[0018] The first connecting portion of the adapter of the present application contacts the first rib plate or the second rib plate of the first beam, and the first fixing member is locked to the first connecting portion and the first rib plate in contact or the first connecting portion and the second rib plate in contact, so that a reliable fixed connection is formed between the first connecting portion and the first beam, and the connection strength between the first beam and the second beam can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0020] Figure 1 It is a schematic structural diagram of an embodiment of the box body of the battery pack of the present application;

[0021] Figure 2 It is a schematic structural diagram of the first embodiment of the connection between the first beam and the second beam of the present application through an adapter;

[0022] Figure 3 is Figure 2 A schematic structural diagram of area A in;

[0023] Figure 4 is Figure 2 A schematic cross-sectional structure diagram in the B-B direction in;

[0024] Figure 5 is Figure 4 A schematic structural diagram of area C in;

[0025] Figure 6 It is a schematic diagram of the torsional resistance principle of the first beam and the second beam of the present application;

[0026] Figure 7 It is a schematic structural diagram of an embodiment of the adapter of the present application;

[0027] Figure 8 It is a schematic structural diagram of an embodiment of the first beam of the present application;

[0028] Figure 9 is Figure 8 A schematic structural diagram of area D in;

[0029] Figure 10 It is an exploded structural diagram of the second embodiment of the connection between the first beam and the second beam of the present application through an adapter;

[0030] Figure 11 It is a schematic structural diagram of the third embodiment of the connection between the first beam and the second beam of the present application through an adapter;

[0031] Figure 12 yes Figure 11 Schematic diagram of the cross-sectional structure in the EE direction;

[0032] Figure 13 yes Figure 11 A side view structural schematic diagram of;

[0033] Figure 14 yes Figure 13 Schematic diagram of the cross-sectional structure in the FF direction;

[0034] Figure 15 This is a structural schematic diagram of a fourth embodiment of the present application in which the first beam and the second beam are connected via an adapter;

[0035] Figure 16 yes Figure 15 Schematic diagram of the cross-sectional structure along the GG direction.

[0036] Description of reference numerals:

[0037] 10 battery packs.

[0038] 20 box body; 21 first beam; 211 first rib plate; 2111 first sub-rib plate; 2112 second sub-rib plate; 2113 first avoidance hole; 2114 third sub-rib plate; 2115 fourth sub-rib plate; 212 second rib plate; 2121 fifth sub-rib plate; 2122 sixth sub-rib plate; 2123 second avoidance hole; 213 matching rib plate; 22 second beam; 23 accommodating cavity; 24 side beam.

[0039] 30 adapter; 31 main body; 32 first connecting part; 33 second connecting part.

[0040] 41 first fixing member; 411 first fixing portion; 412 second fixing portion; 42 second fixing member; 43 third fixing member; 44 fourth fixing member.

[0041] 50 reinforcements. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with 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 of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present application. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present application and are not used to limit the present application. In the present application, unless otherwise stated, the directional words used, such as "up", "down", "left", and "right", generally refer to the upper, lower, left, and right of the device in actual use or working state, specifically the drawing direction in the accompanying drawings.

[0043] In this application, unless otherwise clearly defined and limited, terms such as "connected", "coupled", "stacked", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0044] This application provides a battery pack, which will be described in detail below. It should be noted that the description order of the following embodiments does not limit the preferred order of the embodiments of this application. And in the following embodiments, each embodiment has its own emphasis. For the parts not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0045] To solve the technical problem that the structural torsional strength of the battery pack housing in the prior art is relatively low, an embodiment of this application provides a battery pack. The battery pack has an intersecting first direction and a second direction. The battery pack includes a housing, the housing includes a plurality of first beams and a plurality of second beams, the extending directions of the first beams, the extending directions of the second beams, and the first direction intersect pairwise, and the second direction is parallel to the extending direction of the second beams; the plurality of first beams and the plurality of second beams cooperate to enclose an accommodation cavity; wherein, the first beam includes at least two first rib plates spaced along the first direction and at least two second rib plates spaced along the second direction, and each first rib plate is connected between two adjacent second rib plates. The battery pack further includes an adapter, the adapter includes a connected main body portion and a first connection portion, and the arrangement direction of the main body portion and the first connection portion intersects the first direction; the main body portion is connected to the second beam, the first connection portion contacts at least one first rib plate, and the dimension of the main body portion in the first direction is greater than the dimension of the first connection portion in the first direction. The battery pack further includes a first fixing member, and the first fixing member is locked to the contacting first connection portion and the first rib plate. The battery pack further includes a single battery, and the single battery is disposed in the accommodation cavity. The following will be elaborated in detail.

[0046] Please refer to Figure 1 , Figure 1 which is a schematic structural diagram of an embodiment of the housing of the battery pack of this application.

[0047] In one embodiment, the battery pack 10 includes a box 20 and a plurality of single cells, and the plurality of single cells are accommodated in the box 20. The single cell pack 10 includes but is not limited to lithium ion secondary batteries, lithium ion primary batteries, lithium sulfur batteries, sodium lithium ion batteries, sodium ion batteries or magnesium ion batteries, etc., and the embodiments of the present disclosure are not limited to this. The battery pack 10 is a power supply for an electrical device. The electrical device can be a mobile phone, a portable device, a laptop computer, a battery car, an electric car, a ship, a spacecraft, an electric toy and an electric tool. For example, a spacecraft includes an airplane, a rocket, a space shuttle and a spacecraft; an electric toy includes a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy and an electric airplane toy; an electric tool includes a metal cutting electric tool, a grinding electric tool, an assembly electric tool and an electric tool for railways, such as an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact drill, a concrete vibrator and an electric planer.

[0048] Specifically, the box body 20 includes a plurality of first beams 21 and a plurality of second beams 22, the extension direction of the first beams 21 intersects with the extension direction of the second beams 22, the plurality of first beams 21 cooperate with the plurality of second beams 22 to enclose a receiving cavity 23, and the single battery is disposed in the receiving cavity 23. The first beams 21 and the second beams 22 are spliced ​​by an adapter 30, which replaces the welding connection between the first beams 21 and the second beams 22, and can avoid the influence of thermal stress and thermal deformation generated by welding on the overall structural strength of the box body 20, thereby facilitating the overall structural strength of the box body 20.

[0049] It should be noted that the first beam 21 and the second beam 22 may both be beam structures inside the box 20, or at least one of the first beam 21 and the second beam 22 may be a beam structure outside the box 20. In other words, in the embodiment of the present application, the beam structures inside the box 20 may be spliced ​​by the adapter 30, the beam structures outside the box 20 may be spliced ​​by the adapter 30, or the beam structures inside the box 20 and the beam structures outside the box 20 may be spliced ​​by the adapter 30. For example, in the present embodiment, the first beam 21 and the second beam 22 are both beam structures inside the box 20. The box 20 further includes a side beam 24, which is arranged around the periphery of the first beam 21 and the second beam 22. The first beam 21 and the second beam 22 are spliced ​​by the adapter 30. Of course, the first beam 21 and the side beam 24 and / or the second beam 22 and the side beam 24 may also be spliced ​​by the adapter 30.

[0050] Please also read Figures 2 to 9 , Figure 2 This is a structural schematic diagram of the first embodiment of the present application in which the first beam and the second beam are connected via an adapter. Figure 3 yes Figure 2 The structural diagram of the A area in the middle. Figure 4Yes Figure 2 Schematic cross-sectional structure diagram in the B-B direction in Figure 5 Yes Figure 4 Schematic structure diagram of area C in Figure 6 Schematic diagram of the torsional resistance principle of the first beam and the second beam of the present application Figure 7 Schematic structure diagram of an embodiment of the adapter of the present application Figure 8 Schematic structure diagram of an embodiment of the first beam of the present application Figure 9 Yes Figure 8 Schematic structure diagram of area D in

[0051] In one embodiment, the battery pack 10 has a first direction Z, a second direction X, and a third direction Y, and the first direction Z, the second direction X, and the third direction Y intersect pairwise. The extending directions of the first beam 21, the second beam 22, and the first direction Z intersect pairwise. Specifically, the first beam 21 extends along the third direction Y, and the second beam 22 extends along the second direction X. In the embodiments of the present application, it is exemplarily described with the first direction Z, the second direction X, and the third direction Y being pairwise perpendicular to each other. This is only for the need of discussion and is not limited thereby.

[0052] As Figure 9 shown, the first beam 21 includes at least two first rib plates 211 spaced along the first direction Z and at least two second rib plates 212 spaced along the second direction X, and each first rib plate 211 is connected between two adjacent second rib plates 212. The first rib plate 211 is connected to the second rib plate 212 to form a complete first beam 21.

[0053] The adapter 30 includes a connected main body portion 31 and a first connection portion 32, and the arrangement direction of the main body portion 31 and the first connection portion 32 intersects with the first direction Z. The main body portion 31 is connected to the second beam 22, and the first connection portion 32 contacts the first rib plate 211 of the first beam 21, so as to realize the splicing between the first beam 21 and the second beam 22 through the adapter 30.

[0054] As Figure 7 shown, the dimension of the main body portion 31 in the first direction Z is larger than the dimension of the first connection portion 32 in the first direction Z, so that the adapter 30 as a whole presents a stepped structure. In this way, when relative torsion occurs between the first beam 21 and the second beam 22, the main body portion 31 and the first connection portion 32 respectively apply acting forces to the first beam 21, and the acting points of the acting forces applied by the main body portion 31 and the first connection portion 32 are different, so that the torsional strength between the first beam 21 and the second beam 22 can be improved.

[0055] For example, as Figure 6 shown, when the first beam 21 rotates relative to the second beam 22 along Figure 6When twisted in the direction indicated by the dashed arrow, the main body portion 31 of the adapter 30 applies a force F1 to the first beam 21, and the first connecting portion 32 applies a force F2 to the first beam 21. Since the acting points of the force F1 and the force F2 are different, the torsional strength between the first beam 21 and the second beam 22 can be improved. Moreover, in this embodiment, the size of the first connecting portion 32 in the first direction Z is small, which can reduce the material cost of the adapter 30 and reduce the weight of the adapter 30. If the size of the first connecting portion 32 in the first direction Z is larger than the size of the main body portion 31 in the first direction Z, the portion where the first connecting portion 32 protrudes relative to the main body portion 31 is likely to have a problem of being too high, which will affect the normal closing between the box body 20 and the box cover.

[0056] It should be noted that the arrangement direction of the main body portion 31 and the first connecting portion 32 is perpendicular to the first direction Z, that is, the arrangement direction of the main body portion 31 and the first connecting portion 32 can be parallel to the extending direction of the first beam 21, or the arrangement direction of the main body portion 31 and the first connecting portion 32 can be parallel to the extending direction of the second beam 22. In this embodiment of the application, the case where the arrangement direction of the main body portion 31 and the first connecting portion 32 is parallel to the extending direction of the first beam 21 is taken as an example for illustration, which is only for the need of discussion and does not cause any limitation.

[0057] Figure 5 and Figure 7 Exemplarily, it is shown that the first connecting portion 32 is arranged close to the bottom of the main body portion 31. Of course, in other embodiments of the present application, the first connecting portion 32 can also be arranged close to the top of the main body portion 31, which is not limited herein.

[0058] The adapter 30 further includes a second connecting portion 33. The first connecting portion 32 and the second connecting portion 33 are respectively connected to opposite sides of the main body portion 31. The arrangement direction of the first connecting portion 32 and the second connecting portion 33 is perpendicular to the first direction Z, that is, the arrangement direction of the first connecting portion 32 and the second connecting portion 33 can be parallel to the extending direction of the first beam 21 (which will be elaborated in detail below), or the arrangement direction of the first connecting portion 32 and the second connecting portion 33 can be parallel to the extending direction of the second beam 22. The main body portion 31 of the adapter 30 is connected to the second beam 22 through the second connecting portion 33.

[0059] Optionally, the material of the adapter 30 can be aluminum alloy, etc., and the adapter 30 can be formed by die-casting process.

[0060] In one embodiment, the volume of the main body portion 31 is V1 cm 3 , and the volume of the first connecting portion 32 is V2 cm 3, satisfying: 1 < V1 / V2 ≤ 4. In this embodiment, by reasonably setting the volumes of the main body portion 31 and the first connecting portion 32, the torsional strength between the first beam 21 and the second beam 22 can be ensured, the material cost of the adapter 30 can be reduced, and the weight of the adapter 30 can be lightened.

[0061] Optionally, the volume V1 of the main body portion 31 further satisfies: 16 ≤ V1 ≤ 80. For example, V1 can be any value among 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80.

[0062] The volume V2 of the first connecting portion 32 further satisfies: 4 ≤ V2 ≤ 80. For example, V2 can be any value among 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80.

[0063] In one embodiment, the battery pack 10 further includes a first fixing member 41. The first fixing member 41 is locked to the contacting first connecting portion 32 and the first rib 211, that is, the first fixing member 41 is directly locked to the contacting first connecting portion 32 and the first rib 211, so that a reliable fixed connection is formed between the first connecting portion 32 and the first rib 211, and the connection strength between the first beam 21 and the second beam 22 can be improved.

[0064] The first fixing member 41 includes a first fixing portion 411 and a second fixing portion 412. The first fixing portion 411 is connected to the first connecting portion 32. The second fixing portion 412 is connected to the end of the first fixing portion 411. The second fixing portion 412 is located on the side of the first rib 211 facing away from the first connecting portion 32, and the second fixing portion 412 abuts against the surface of the first rib 211 facing away from the first connecting portion 32. The first fixing portion 411 and the second fixing portion 412 cooperate to fix the first connecting portion 32 and the first rib 211.

[0065] Further, at least two of the first rib plates 211 include a first sub-rib plate 2111, a second sub-rib plate 2112, and a third sub-rib plate 2114 that are spaced apart along the first direction Z. The second sub-rib plate 2112 is located between the first sub-rib plate 2111 and the third sub-rib plate 2114. The first sub-rib plate 2111, the second sub-rib plate 2112, and the third sub-rib plate 2114 are all connected between two adjacent second rib plates 212. The first sub-rib plate 2111, the third sub-rib plate 2114, and the second rib plate 212 cooperate to form the overall frame structure of the first beam 21, and the second sub-rib plate 2112 is located in the space surrounded by the cooperation of the first sub-rib plate 2111, the third sub-rib plate 2114, and the second rib plate 212. Further still, at least two of the first rib plates 211 further include a fourth sub-rib plate 2115. The fourth sub-rib plate 2115 is located between the second sub-rib plate 2112 and the third sub-rib plate 2114 in the first direction Z.

[0066] The second sub-rib plate 2112 is in contact with the first connecting portion 32, and the first fixing member 41 is locked to the contacted first connecting portion 32 and the second sub-rib plate 2112. That is, the second fixing portion 412 of the first fixing member 41 is located on the side of the second sub-rib plate 2112 facing away from the first connecting portion 32, and the second fixing portion 412 abuts against the surface of the second sub-rib plate 2112 facing away from the first connecting portion 32.

[0067] The number of the second sub-rib plates 2112 can be one, two or more, and at least one of the second sub-rib plates 2112 is in contact with the first connecting portion 32 and is locked and connected by the first fixing member 41.

[0068] The battery pack 10 further includes a second fixing member 42. The first sub-rib plate 2111 and the main body portion 31 are fixedly connected by the second fixing member 42. The first sub-rib plate 2111 is provided with a first avoidance hole 2113. The first avoidance hole 2113 is relatively far from the second beam 22 with respect to the second fixing member 42, and the first avoidance hole 2113 is disposed opposite to the first connecting portion 32. The first avoidance hole 2113 is configured to allow the first fixing member 41 to pass through so that the first fixing member 41 is locked to the first connecting portion 32 and the second sub-rib plate 2112. In this way, both the first connecting portion 32 and the first fixing member 41 are hidden in the internal cavity of the first beam 21, and it is possible to avoid the first fixing member 41 protruding outwards and exceeding the height of the first beam 21.

[0069] Of course, in other embodiments of the present application, it is also possible that the first sub-rib plate 2111 is in contact with the first connecting portion 32 and locked and connected by the first fixing member 41. In this way, the second sub-rib plate 2112 can be omitted, and the structure of the first beam 21 can be simplified. Specifically, the second fixing portion 412 of the first fixing member 41 is located on the side of the first sub-rib plate 2111 facing away from the first connecting portion 32, and the second fixing portion 412 abuts against the surface of the first sub-rib plate 2111 facing away from the first connecting portion 32; or, the third sub-rib plate 2114 is in contact with the first connecting portion 32 and locked and connected by the first fixing member 41. Similarly, the second sub-rib plate 2112 can be omitted, and the structure of the first beam 21 can be simplified. Specifically, the second fixing portion 412 of the first fixing member 41 is located on the side of the third sub-rib plate 2114 facing away from the first connecting portion 32, and the second fixing portion 412 abuts against the surface of the third sub-rib plate 2114 facing away from the first connecting portion 32. No limitation is made here.

[0070] In one embodiment, as Figure 9 shown, the first beam 21 further includes a mating rib plate 213. The mating rib plate 213 is disposed on the top of the first rib plate 211 closest to the lid, specifically, the mating rib plate 213 is disposed on the top of the uppermost first sub-rib plate 2111. If the size of the first connecting portion 32 in the first direction Z is greater than the size of the main body portion 31 in the first direction Z as described in the above embodiment, the protruding portion of the first connecting portion 32 relative to the main body portion 31 is likely to exceed the height of the mating rib plate 213, and the protruding first connecting portion 32 will affect the closing between the box body 20 and the lid.

[0071] In one embodiment, the battery pack 10 further includes a reinforcing member 50 and a third fixing member 43. The reinforcing member 50, the first sub-rib plate 2111 of the first beam 21, and the main body portion 31 are fixedly connected by a second fixing member 42. The reinforcing member 50 is also fixedly connected to the second beam 22 by a third fixing member 43. The reinforcing member 50 can enhance the connection strength between the first beam 21 and the second beam 22 on the basis of the adapter 30.

[0072] Optionally, the material of the reinforcing member 50 can be aluminum alloy or the like, and the reinforcing member 50 can be formed by die-casting.

[0073] In one embodiment, the arrangement direction of the first connecting portion 32 and the second connecting portion 33 of the adapter 30 is parallel to the extending direction of the first beam 21, that is, the arrangement direction of the first connecting portion 32 and the second connecting portion 33 is parallel to the third direction Y. The second beam 22 is connected to the second connecting portion 33.

[0074] Specifically, the second connecting portion 33 is connected to a side of the second beam 22 away from the first beam 21. The main body portion 31 of the adapter 30 passes through the second beam 22. The battery pack 10 further includes a fourth fixing member 44, and the second connecting portion 33 is fixed to the side of the second beam 22 away from the first beam 21 by the fourth fixing member 44. Of course, in other embodiments of the present application, the second connecting portion 33 may also be connected to a side of the second beam 22 close to the first beam 21, which is not limited herein.

[0075] It should be noted that the first fixing member 41, the second fixing member 42, the third fixing member 43, and the fourth fixing member 44 may be fasteners such as screws, bolts, and rivets. Exemplarily, in this embodiment, the first fixing member 41 and the second fixing member 42 may be bolts, etc., and the first fixing member 41 and the second fixing member 42 are connected to the wire thread inserts of the adapter 30. The third fixing member 43 and the fourth fixing member 44 may be blind rivets, etc. Moreover, a structural adhesive may be applied between the adapter 30 and the first beam 21 and / or between the adapter 30 and the second beam 22 to further improve the connection strength between the first beam 21 and the second beam 22.

[0076] Please refer to Figure 10 , Figure 10 which is an exploded structural schematic diagram of the second embodiment of the connection between the first beam and the second beam of the present application through an adapter.

[0077] In one embodiment, the adapter 30 includes a main body portion 31, a first connecting portion 32, and a second connecting portion 33. The first connecting portion 32 and the second connecting portion 33 are respectively connected to opposite sides of the main body portion 31, and the arrangement direction of the first connecting portion 32 and the second connecting portion 33 is parallel to the extending direction of the first beam 21. The connection manner between the adapter 30 and the first beam 21 has been elaborated in detail in the above embodiment, and will not be repeated here.

[0078] The difference between this embodiment and the above embodiment is that the second connecting portion 33 is connected to a side of the second beam 22 close to the first beam 21. The main body portion 31 of the adapter 30 in this embodiment does not pass through the second beam 22, and the second connecting portion 33 is fixed to the side of the second beam 22 close to the first beam 21 by the fourth fixing member 44. In this way, the second beam 22 in this embodiment omits the hollow design for the main body portion 31 of the adapter 30 to pass through, which is beneficial to ensuring the overall structural strength of the second beam 22, and further beneficial to ensuring the overall structural strength of the box body 20.

[0079] Please refer to Figures 11 to 14 , Figure 11 which is a structural schematic diagram of the third embodiment of the connection between the first beam and the second beam of the present application through an adapter, Figure 12 is Figure 11 the cross-sectional structural schematic diagram in the E-E direction of Figure 13 is Figure 11Schematic side view structure diagram, Figure 14 is Figure 13 Schematic cross-sectional structure diagram in the F-F direction in

[0080] In one embodiment, the adapter 30 includes a main body portion 31, a first connecting portion 32, and a second connecting portion 33. The first connecting portion 32 and the second connecting portion 33 are respectively connected to opposite sides of the main body portion 31, and the arrangement direction of the first connecting portion 32 and the second connecting portion 33 is parallel to the extending direction of the first beam 21. The difference between this embodiment and the above embodiment is that the second rib plate 212 is in contact with the first connecting portion 32, and the first fixing member 41 is locked to the contacted first connecting portion 32 and the second rib plate 212. The first fixing portion 411 of the first fixing member 41 is connected to the first connecting portion 32, and the second fixing portion 412 is located on the side of the second rib plate 212 facing away from the first connecting portion 32, and the second fixing portion 412 abuts against the surface of the second rib plate 212 facing away from the first connecting portion 32.

[0081] Figure 12 and Figure 14 Exemplarily shows that the first beam 21 includes two second rib plates 212 spaced apart along the second direction X. At least two first rib plates 211 of the first beam 21 include a first sub-rib plate 2111, a second sub-rib plate 2112, and a third sub-rib plate 2114 spaced apart along the first direction Z. The second sub-rib plate 2112 is located between the first sub-rib plate 2111 and the third sub-rib plate 2114, and the first sub-rib plate 2111, the second sub-rib plate 2112, and the third sub-rib plate 2114 are all connected between two adjacent second rib plates 212. Each second rib plate 212 is in contact with the first connecting portion 32, and each second rib plate 212 and the first connecting portion 32 are locked by the first fixing member 41. The number of the first fixing members 41 is two, and each first fixing member 41 locks and connects the corresponding second rib plate 212 and the first connecting portion 32 of the adapter 30 from both sides in the second direction X.

[0082] The first sub-rib plate 2111 of the first beam 21 and the main body portion 31 are fixedly connected by a second fixing member 42. The battery pack 10 further includes a reinforcing member 50 and a third fixing member 43. The reinforcing member 50, the first sub-rib plate 2111, and the main body portion 31 are fixedly connected by the second fixing member 42. The reinforcing member 50 is also fixedly connected to the second beam 22 by the third fixing member 43. The reinforcing member 50 can enhance the connection strength between the first beam 21 and the second beam 22 on the basis of the adapter 30.

[0083] The main body portion 31 of the adapter 30 passes through the second beam 22. The second connecting portion 33 is fixed to the side of the second beam 22 away from the first beam 21 by a fourth fixing member 44. Of course, in other embodiments of the present application, the second connecting portion 33 may also be connected to the side of the second beam 22 close to the first beam 21, which is not limited herein.

[0084] Please refer to Figure 15 and Figure 16 , Figure 15 which is a schematic structural view of the fourth embodiment in which the first beam and the second beam of the present application are connected through an adapter, Figure 16 and Figure 15 is a schematic cross-sectional structure view in the G-G direction in

[0085] In one embodiment, the adapter 30 includes a main body portion 31, a first connecting portion 32, and a second connecting portion 33. The first connecting portion 32 and the second connecting portion 33 are respectively connected to opposite sides of the main body portion 31, and the arrangement direction of the first connecting portion 32 and the second connecting portion 33 is parallel to the extending direction of the first beam 21.

[0086] The difference between this embodiment and the above embodiment is that at least two second rib plates 212 of the first beam 21 include at least two fifth sub-rib plates 2121 spaced apart along the second direction X and a sixth sub-rib plate 2122 located between two adjacent fifth sub-rib plates 2121. Both the fifth sub-rib plate 2121 and the sixth sub-rib plate 2122 are connected between two adjacent first rib plates 211.

[0087] The sixth sub-rib plate 2122 is in contact with the first connecting portion 32, and the first fixing member 41 is locked to the contacted first connecting portion 32 and the sixth sub-rib plate 2122. In other words, the first fixing portion 411 of the first fixing member 41 in this embodiment is connected to the first connecting portion 32, and the second fixing portion 412 is located on the side of the sixth sub-rib plate 2122 facing away from the first connecting portion 32, and the second fixing portion 412 abuts against the surface of the sixth sub-rib plate 2122 facing away from the first connecting portion 32. Further, the fifth sub-rib plate 2121 is provided with a second avoidance hole 2123, and the second avoidance hole 2123 is disposed opposite to the first connecting portion 32, and the second avoidance hole 2123 is configured to allow the first fixing member 41 to pass through so that the first fixing member 41 is locked to the first connecting portion 32 and the sixth sub-rib plate 2122.

[0088] Figure 16 Exemplarily, it is shown that the first beam 21 includes two fifth sub-rib plates 2121 and two sixth sub-rib plates 2122 spaced apart along the second direction X. Each sixth sub-rib plate 2122 is in contact with the first connecting portion 32, and each sixth sub-rib plate 2122 and the first connecting portion 32 are locked through the first fixing member 41. The number of the first fixing members 41 is two, and each fifth sub-rib plate 2121 is provided with a second avoidance hole 2123. Each first fixing member 41 locks and connects the corresponding sixth sub-rib plate 2122 and the first connecting portion 32 of the adapter 30 from both sides in the second direction X.

[0089] The first rib plate 211 and the main body 31 are fixedly connected by the second fixing member 42. The battery pack 10 further includes a reinforcing member 50 and a third fixing member 43. The reinforcing member 50, the first rib plate 211 of the first beam 21, and the main body 31 are fixedly connected by the second fixing member 42. The reinforcing member 50 is also fixedly connected to the second beam 22 by the third fixing member 43. The reinforcing member 50 can enhance the connection strength between the first beam 21 and the second beam 22 on the basis of the adapter 30.

[0090] The main body 31 of the adapter 30 passes through the second beam 22. The second connecting portion 33 is fixed to the side of the second beam 22 away from the first beam 21 by the fourth fixing member 44. Of course, in other embodiments of the present application, the second connecting portion 33 may also be connected to the side of the second beam 22 close to the first beam 21, which is not limited herein.

[0091] The battery pack provided by the present application has been introduced in detail above. Specific examples are used in this article to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the method and its core idea of the present application; at the same time, for those of ordinary skill in the art, according to the idea of the present application, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present application.

Claims

1. A battery pack, characterized in that: The battery pack has a first direction and a second direction intersecting each other, and the battery pack includes: A box body, comprising a plurality of first beams and a plurality of second beams, wherein the extension direction of the first beams, the extension direction of the second beams and the first direction intersect each other, and the second direction is parallel to the extension direction of the second beams; the plurality of first beams cooperate with the plurality of second beams to enclose a receiving cavity; wherein the first beam comprises at least two first ribs spaced apart along the first direction and at least two second ribs spaced apart along the second direction, and each of the first ribs is connected between two adjacent second ribs; The adapter comprises a main body and a first connecting part connected to each other, wherein the arrangement direction of the main body and the first connecting part intersects with the first direction; the main body is connected to the second beam, and the first connecting part is in contact with at least one first rib plate, wherein the size of the main body in the first direction is greater than the size of the first connecting part in the first direction; A first fixing member is locked to the first connecting portion and the first rib plate in contact with each other; and The single battery is arranged in the accommodating cavity.

2. The battery pack according to claim 1, characterized in that: The at least two first ribs include a first sub-rib, a second sub-rib and a third sub-rib distributed at intervals along the first direction, the second sub-rib is located between the first sub-rib and the third sub-rib, and the first sub-rib, the second sub-rib and the third sub-rib are all connected between two adjacent second ribs; Wherein, the second sub-rib plate is in contact with the first connecting portion, and the first fixing member is locked to the contacting first connecting portion and the second sub-rib plate.

3. The battery pack according to claim 2, characterized in that: The first fixing member comprises: a first fixing portion connected to the first connecting portion; and The second fixing portion is connected to the end of the first fixing portion, the second fixing portion is located on the side of the second sub-rib plate facing away from the first connecting portion, and the second fixing portion abuts against the surface of the second sub-rib plate facing away from the first connecting portion, and the first fixing portion and the second fixing portion cooperate to fix the contacting first connecting portion and the second sub-rib plate.

4. The battery pack according to claim 2, characterized in that: The battery pack also includes a second fixing member, and the first sub-rib plate and the main body are fixedly connected by the second fixing member; the first sub-rib plate is provided with a first avoidance hole, and the first avoidance hole is arranged opposite to the first connecting portion, and the first avoidance hole is configured to allow the first fixing member to pass through so that the first fixing member is locked to the first connecting portion and the second sub-rib plate.

5. The battery pack according to claim 1, characterized in that: The adapter also includes a second connecting portion, the first connecting portion and the second connecting portion are respectively connected to opposite sides of the main body, and the arrangement direction of the first connecting portion and the second connecting portion is parallel to the extension direction of the first beam, and the main body is connected to the second beam through the second connecting portion.

6. The battery pack according to claim 5, characterized in that: The second connecting portion is connected to a side of the second beam away from the first beam; and / or The second connecting portion is connected to a side of the second beam close to the first beam.

7. The battery pack according to claim 1, characterized in that: The battery pack further includes a reinforcement, a second fixing member and a third fixing member. The reinforcement, the first rib plate and the main body are fixedly connected via the second fixing member, and the reinforcement and the second beam are fixedly connected via the third fixing member.

8. A battery pack, characterized in that: The battery pack has a first direction and a second direction intersecting each other, and the battery pack includes: A box body, comprising a plurality of first beams and a plurality of second beams, wherein the extension direction of the first beams, the extension direction of the second beams and the first direction intersect each other, and the second direction is parallel to the extension direction of the second beams; the plurality of first beams cooperate with the plurality of second beams to enclose a receiving cavity; wherein the first beam comprises at least two first ribs spaced apart along the first direction and at least two second ribs spaced apart along the second direction, and each of the first ribs is connected between two adjacent second ribs; The adapter comprises a main body and a first connecting part connected to each other, wherein the arrangement direction of the main body and the first connecting part intersects with the first direction; the main body is connected to the second beam, and the first connecting part is in contact with at least one second rib plate, wherein the size of the main body in the first direction is greater than the size of the first connecting part in the first direction; A first fixing member is locked to the first connecting portion and the second rib plate in contact with each other; and The single battery is arranged in the accommodating cavity.

9. The battery pack according to claim 8, characterized in that: Each of the second ribs is in contact with the first connection portion, and each of the second ribs is locked with the first connection portion via the first fixing member.

10. The battery pack according to claim 9, characterized in that: The first fixing member comprises: a first fixing portion connected to the first connecting portion; and The second fixing portion is connected to the end of the first fixing portion, the second fixing portion is located on the side of the second rib plate facing away from the first connecting portion, and the second fixing portion abuts against the surface of the second rib plate facing away from the first connecting portion, and the first fixing portion and the second fixing portion cooperate to fix the contacting first connecting portion and the second rib plate.

11. The battery pack according to claim 8, characterized in that: The at least two second ribs include at least two fifth sub-ribs spaced apart along the second direction and a sixth sub-rib located between two adjacent fifth sub-ribs, and the fifth sub-rib and the sixth sub-rib are both connected between two adjacent first ribs; The sixth sub-rib is in contact with the first connection portion, and the first fixing member is locked to the contacting first connection portion and the sixth sub-rib.

12. The battery pack according to claim 11, characterized in that: The first fixing member comprises: a first fixing portion connected to the first connecting portion; and The second fixing portion is connected to the end of the first fixing portion, the second fixing portion is located on the side of the sixth sub-rib plate facing away from the first connecting portion, and the second fixing portion abuts against the surface of the sixth sub-rib plate facing away from the first connecting portion, and the first fixing portion and the second fixing portion cooperate to fix the contacting first connecting portion and the sixth sub-rib plate.

13. The battery pack according to claim 11, characterized in that: The fifth sub-rib plate is provided with a second avoidance hole, which is arranged opposite to the first connection portion, and the second avoidance hole is configured to allow the first fixing member to pass through so that the first fixing member is locked to the first connection portion and the sixth sub-rib plate.

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