Busbar connection protection device and battery device

Abstract

The utility model relates to the technical field of batteries, in particular to a busbar connection protection device and a battery device. The busbar connection protection device comprises a base and an upper cover, the base comprises a first bottom wall and two first side walls, the two first side walls are oppositely arranged at the two ends of the first bottom wall at intervals in the first direction, and each first side wall is provided with a first clamping part; the upper cover comprises a second bottom wall and two second side walls, the two second side walls are oppositely arranged at the two ends of the second bottom wall at intervals in the first direction, and each second side wall is provided with a second clamping part; the two second side walls are each provided with a first inner side face facing each other, in the vertical direction, each first inner side face comprises a first sub-inner side face and a second sub-inner side face, the second sub-inner side faces are away from the second bottom wall compared with the first sub-inner side faces, and the first sub-inner side faces are perpendicular to the first direction. The second sub-inner side surface is inclined outward so as to form an angle with the first sub-inner side surface.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery, in particular to a busbar connection protection device and a battery device. BACKGROUND

[0002] In a power combination battery, battery modules are usually connected in series through high-voltage copper bars to achieve the voltage, current and power and other electrical properties required by the whole vehicle. The high-voltage copper bars are screwed with the positive and negative high-voltage output poles of the battery modules. In order to prevent short circuit and the danger of accidental electric shock of workers during operation, the positive and negative high-voltage output poles are usually placed on a high-voltage output base and protected by a high-voltage output protection structure. However, the high-voltage output protection structure is prone to misalignment or breakage when installed on the high-voltage output base. CONTENT OF THE UTILITY MODEL

[0003] The present application provides a busbar connection protection device and a battery device, which achieves the technical effect that the upper cover is convenient to install and detach.

[0004] In order to achieve the above purpose, the main technical scheme adopted by the present application comprises:

[0005] In a first aspect, the present application provides a busbar connection protection device, comprising a base and an upper cover. The base comprises a first bottom wall and two first side walls. Along a first direction, the two first side walls are oppositely and spacedly arranged at both ends of the first bottom wall. Each first side wall is provided with a first clamping part. The first direction is perpendicular to the vertical direction. The upper cover comprises a second bottom wall and two second side walls. Along the first direction, the two second side walls are oppositely and spacedly arranged at both ends of the second bottom wall. Each second side wall is provided with a second clamping part. The second clamping part on each second side wall is adapted to be clamped and matched with the first clamping part of the corresponding first side wall, so as to fix the upper cover to the base and enclose an installation space for installing multiple busbars. Wherein, both second side walls have first inner side faces facing each other. Along the vertical direction, the first inner side face comprises a first sub-inner side face and a second sub-inner side face. The second sub-inner side face is farther away from the second bottom wall than the first sub-inner side face. The first sub-inner side face is perpendicular to the first direction. The second sub-inner side face is inclined outwardly to be arranged at an angle with the first sub-inner side face.

[0006] The busbar connection protection device provided in the present application embodiment has the second sub-inner side face located on the side away from the second bottom wall, and the second sub-inner side face is inclined outwardly. Along the direction from top to bottom, the distance between the first sub-inner side face and the first side wall increases. When the upper cover is detached from the base, the second sub-inner side face provides a force point, which is convenient for detaching.

[0007] The second sub-inner side surface is outwardly inclined at an angle with the first sub-inner side surface, which is equivalent to forming a guide structure. When the upper cover is placed on the base, the second sub-inner side surface provides a guide for the upper cover, so that the upper cover is more convenient and fast to slide and cooperate with the base, reduces the impact force directly borne by the upper cover, and further reduces the fracture or damage of the upper cover.

[0008] Optionally, one of the first clamping part and the second clamping part is a clamping hole, and the other of the first clamping part and the second clamping part is a protrusion. The upper cover and the base are connected through the first clamping part and the second clamping part, so that the connection between the upper cover and the base is safe and reliable, and the upper cover is not easy to fall off.

[0009] Optionally, the two second side walls each have a first outer side surface facing away from each other, the second clamping part is configured as a clamping hole, an axis of the clamping hole is parallel to the first direction, the clamping hole penetrates the first sub-inner side surface and the first outer side surface along the first direction, and a projection of the clamping hole falls within a projection of the first sub-inner side surface.

[0010] In the above scheme, the clamping hole penetrates the first sub-inner side surface and the first outer side surface, and the projection of the clamping hole falls within the projection of the first sub-inner side surface along the first direction, so that the connection between the upper cover and the base is more firm when the upper cover is connected with the base.

[0011] Optionally, the first clamping part is configured as a protrusion, the two first side walls each have a second outer side surface facing away from each other, and the protrusion is arranged on the second outer side surface; along a vertical direction, the protrusion has a first clamping surface and a second clamping surface, the first clamping surface is farther away from the first bottom wall than the second clamping surface, and along a direction from top to bottom, a distance between the first clamping surface and the second outer side surface gradually increases, and a distance between the second clamping surface and the second outer side surface gradually decreases.

[0012] In the above scheme, the first clamping surface and the second clamping surface are both connected with the second outer side surface at an angle, and along the direction from top to bottom, the distance between the first clamping surface and the second outer side surface gradually increases, and the distance between the second clamping surface and the second outer side surface gradually decreases, so that the upper cover is easily buckled on the protrusion during installation of the upper cover and the base, and the assembly efficiency is improved; and the upper cover is also easily slid off the protrusion during disassembly of the upper cover and the base, and the disassembly efficiency is improved.

[0013] Optionally, an included angle between the first sub-inner side surface and the second sub-inner side surface is 160°-170°.

[0014] In the above scheme, the first sub-inner side surface and the second sub-inner side surface are arranged at an angle, and along the direction from top to bottom, the distance between the first sub-inner side surface and the first side wall increases. When the upper cover is detached from the base, the second sub-inner side surface provides a force point, facilitating disassembly. And along the direction from top to bottom, the distance between the second sub-inner side surface and the first side wall gradually increases, which is equivalent to forming a guide portion below the second side wall. When the upper cover is arranged on the base, the second sub-inner side surface provides guidance for the upper cover, reducing the impact force directly received by the upper cover, and further reducing the fracture or damage of the upper cover.

[0015] Optionally, along the second direction, the second side wall comprises a plurality of second sub-side walls arranged at intervals, and at least part of the plurality of second sub-side walls is provided with the second clamping part, and the first direction, the second direction and the vertical direction are perpendicular to each other.

[0016] In the above scheme, along the second direction, the second side wall comprises a plurality of second sub-side walls, and each second sub-side wall has a spacing therebetween. When the upper cover needs to be detached from the base, the present application can individually release the clamping locking between one or more second sub-side walls and the first side wall in sequence, which is more labor-saving and less likely to damage the upper cover.

[0017] Optionally, the plurality of second sub-side walls comprises a middle side wall and two end side walls, and along the second direction, the two end side walls are respectively arranged on both sides of the middle side wall; each of the end side walls is provided with a second clamping part, and along the second direction, the size of the middle side wall is greater than that of the end side wall.

[0018] In the above scheme, the plurality of second sub-side walls comprises end side walls on both sides and a middle side wall in the middle, and along the second direction, the size of the middle side wall is greater than that of the end side wall. The size of the middle side wall can ensure the overall strength of the upper cover.

[0019] Optionally, the base further comprises a matching portion and a limiting portion, the matching portion is arranged in the middle region of the first bottom wall and extends downward, and the limiting portion is arranged at the edge of the first bottom wall and extends downward; wherein the matching portion is provided with a third clamping part, the crossbeam of the battery shell surrounds the mounting chamber, along the vertical direction, the crossbeam has oppositely arranged crossbeam top wall and crossbeam bottom wall, at least part of the matching portion is located in the mounting chamber, and the third clamping part abuts against the side surface of the crossbeam top wall facing the mounting chamber, and the limiting portion abuts against the side surface of the crossbeam top wall away from the mounting chamber.

[0020] In the above scheme, in the vertical direction, the limiting portion is spaced apart from the third clamping portion, and the limiting portion and the third clamping portion are located on opposite sides of the top wall of the cross beam, respectively. The limiting portion and the third clamping portion jointly limit the position of the mounting portion installed on the cross beam, and make the fixing of the base more firm and reliable. At the same time, the limiting portion can limit the distance between the first bottom wall and the top wall of the cross beam, control the first bottom wall at a predetermined height, so that the cross-over bus bars between the adjacent two battery modules are maintained at the same height in the up-down direction.

[0021] Optionally, in the first direction, the two first side walls are arranged between the two second side walls; the two first side walls each have a second inner side face facing each other, the second inner side face is configured as a plane, and the second inner side face is perpendicular to the first direction.

[0022] In the above scheme, when the bolt is twisted to fasten the plurality of bus bars to the base, the second inner side face can stop the bus bar from rotating, which is equivalent to increasing the overlap area between the bus bars, reducing the impedance, and making the installation between the bus bars more reliable.

[0023] In a second aspect, the embodiments of the present application provide a battery device comprising the bus bar connection protection device described in any of the above embodiments.

[0024] In the above scheme, the use of the bus bar connection protection device can make the connection of the bus bars of the plurality of battery modules firm and reliable, while increasing the overlap area of the bus bars and reducing the impedance. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0026] Figure 1 It is a structural schematic diagram of the bus bar connection protection device of the present application;

[0027] Figure 2 It is a structural schematic diagram of the upper cover of the present application;

[0028] Figure 3 It is a structural schematic diagram of the base of the present application;

[0029] Figure 4 It is a structural schematic diagram of the base of the present application;

[0030] Figure 5 It is a sectional structural schematic diagram of the bus bar connection protection device of the present application installed on the cross beam;

[0031] Figure 6 Structure diagram of the busbar connection protection device of the present application installed on the cross beam.

[0032]

Explanation of reference numerals

[0033] 1: upper cover; 11: second bottom wall; 12: second side wall; 121: first sub-inner side surface; 122: second sub-inner side surface; 123: first outer side surface; 124: second sub-side wall; 1241: middle side wall; 1242: end side wall; 13: second clamping portion; 14: reinforcing rib;

[0034] 2: base; 21: first bottom wall; 22: first side wall; 221: second inner side surface; 23: first clamping portion; 231: first clamping surface; 232: second clamping surface; 24: fitting portion; 241: third clamping portion; 25: limiting portion;

[0035] 3: busbar;

[0036] 4: cross beam; 41: cross beam top wall; 42: cross beam bottom wall;

[0037] X: first direction; Y: second direction; Z: vertical direction. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0039] Unless otherwise defined, all technical and scientific terms used in the present application have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used in the specification of the present application are only for the purpose of describing the specific embodiments of the present application, and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion. The terms "first", "second" and the like in the specification and claims of the present application and the above description of drawings are used to distinguish different objects, and are not intended to describe a specific order or primary and secondary relationship.

[0040] Reference to an "embodiment" in this application means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. As will be apparent to those of ordinary skill in the art, embodiments described herein can be combined with one another.

[0041] In the description of the application, it is necessary to point out that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "attachment" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be directly connected, or indirectly connected through intermediate medium, or internal communication of two elements. For those of ordinary skill in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0042] The term "and / or" in this application is only to describe the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can mean that A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in this application generally represents that the front and rear associated objects have an "or" relationship.

[0043] "Multiple" appearing in this application means more than two (including two), and similarly, "multiple groups" means more than two groups (including two groups), and "multiple pieces" means more than two pieces (including two pieces).

[0044] In the power battery pack, the battery modules are usually connected in series through high-voltage copper bars to achieve the voltage, current and power of the whole vehicle. The high-voltage copper bars are screwed with the positive and negative high-voltage output poles of the battery modules. In order to prevent short circuit and the danger of accidental electric shock of workers during operation, the positive and negative high-voltage output poles are usually placed on a high-voltage output base and protected by a high-voltage output protection structure.

[0045] At present, the high-voltage output protection structure is installed on the base by buckle connection, which is not easy to install and operate, and the protection structure is easy to be broken by impact during installation or disassembly. Special tools are needed during disassembly, and the disassembly process is complex, which can damage the structure itself and is not conducive to the reuse of the high-voltage output protection structure.

[0046] In addition, when the copper bars are fixed to the protection structure by bolts, the copper bars will rotate with the bolts during the process of tightening the bolts, reducing the overlap area between the copper bars and increasing the impedance.

[0047] In view of this, the application needs to redesign the busbar connection protection device, so that when the upper cover is installed on the base, the damage to the upper cover can be reduced.

[0048] In a first aspect, with reference to Figures 1 to 6 The application provides a busbar connection protection device, which comprises a base 2 and an upper cover 1.

[0049] The base 2 comprises a first bottom wall 21 and two first side walls 22, which are oppositely and spacedly arranged at both ends of the first bottom wall 21 along a first direction X, and each first side wall 22 is provided with a first clamping part 23, and the first direction X is perpendicular to a vertical direction Z.

[0050] With reference to Figure 1 And Figure 2 The upper cover 1 comprises a second bottom wall 11 and two second side walls 12, which are oppositely and spacedly arranged at both ends of the second bottom wall 11 along the first direction X, and each second side wall 12 is provided with a second clamping part 13, and the second clamping part 13 on each second side wall 12 is adapted to be clamped and matched with the first clamping part 23 of the corresponding first side wall 22, so as to fix the upper cover 1 to the base 2 and enclose an installation space for installing a plurality of busbars 3.

[0051] Among them, the two second side walls 12 each have a first inner side face facing each other, and along the vertical direction Z, the first inner side face comprises a first sub-inner side face 121 and a second sub-inner side face 122, the second sub-inner side face 122 is farther away from the second bottom wall 11 than the first sub-inner side face 121, the first sub-inner side face 121 is perpendicular to the first direction X, and the second sub-inner side face 122 is inclined outward to be arranged at an angle with the first sub-inner side face 121.

[0052] The upper cover 1 is covered on the base 2, the two second side walls 12 of the upper cover 1 abut against the two first side walls 22 of the base 2, and are connected by the clamping and matching of the second clamping part 13 and the first clamping part 23. The two second side walls 12 of the upper cover 1 each have a first inner side face, which comprises a first sub-inner side face 121 close to the second bottom wall 11 and a second sub-inner side face 122 away from the second bottom wall 11.

[0053] The first sub-inner side face 121 is located between the inner side face of the second bottom wall 11 and the second sub-inner side face 122. The first sub-inner side face 121 is perpendicular to the first direction X, which is a vertical plane of the vertical direction Z. The second sub-inner side face 122 is inclined outward, that is, inclined along the first direction X towards the direction away from the first side wall 22 of the base 2, forming a guide structure.

[0054] The busbar 3 connection protection device provided by the embodiment of the application, the second sub-inner side surface 122 is located on the side away from the second bottom wall 11, the second sub-inner side surface 122 is inclined outward, and the distance between the first sub-inner side surface 121 and the outer side surface of the first side wall 22 increases in the direction from top to bottom. When the upper cover 1 is detached from the base 2, the second sub-inner side surface 122 provides a force point, facilitating the detachment. That is, the hand or a tool can be manually placed against the second sub-inner side surface 122 to unbuckle the second side wall 12 from the first side wall 22.

[0055] The second sub-inner side surface 122 is inclined outward and arranged at an angle with the first sub-inner side surface 121, which is equivalent to forming a guide structure. When the upper cover 1 is arranged on the base 2, the second sub-inner side surface 122 provides a guide for the upper cover 1, so that the upper cover 1 is more convenient and fast to slide and cooperate with the base 2, the impact force directly borne by the upper cover 1 is reduced, and then the fracture or damage of the upper cover 1 is reduced.

[0056] It should be understood that the second side wall 12 can include a first segment and a second segment connected together, the first segment is connected with the second bottom wall 11, the inner side surface of the first segment is the first sub-inner side surface 121, the inner side surface of the second segment is the second sub-inner side surface 122, and the second segment is inclined outward and arranged at an angle with the first segment.

[0057] Alternatively, the outer side surface of the second segment is on the same plane as the outer side surface of the first segment. In the direction from the connection between the second segment and the first segment to the edge of the second segment, the thickness of the second segment gradually thins, and the second sub-inner side surface 122 gradually inclines outward away from the first side wall 22 of the base 2.

[0058] Alternatively, one of the first clamping part 23 and the second clamping part 13 is a clamping hole, and the other of the first clamping part 23 and the second clamping part 13 is a protrusion. The upper cover 1 and the base 2 are clamped and connected through the first clamping part 23 and the second clamping part 13, so that the connection between the upper cover 1 and the base 2 is safe and reliable, and the upper cover 1 is not easy to fall off.

[0059] Specifically, if the first clamping part 23 is a protrusion and the second clamping part 13 is a clamping hole, when the upper cover 1 is arranged on the base 2, the protrusion is easy to generate an impact force on the second side wall 12 of the upper cover 1, causing damage to the upper cover 1. In the present application, the first sub-inner side surface 121 is inclined outward to form a guide structure, and the impact force of the protrusion on the upper cover 1 is reduced during the installation of the upper cover 1 on the base 2, and the damage to the upper cover 1 is reduced.

[0060] If the first clamping part 23 is a clamping hole and the second clamping part 13 is a protrusion, when the upper cover 1 is arranged on the base 2, the first side wall 22 of the base 2 will easily generate an impact force on the second clamping part 13, and the upper cover 1 will be damaged. In the present application, the first sub-inner side surface 121 is inclined towards the outside, forming a guide structure, so that the second side wall 12 is easily installed downwards along the first side wall 22, reducing the force of the first side wall 22 on the upper cover 1, and further reducing the damage of the first side wall 22 to the upper cover 1.

[0061] Alternatively, the two second side walls 12 each have a first outer side surface 123 facing away from each other, the second clamping part 13 is configured as a clamping hole, the axis of the clamping hole is parallel to the first direction X, along the first direction X, the clamping hole penetrates the first sub-inner side surface 121 and the first outer side surface 123, and the projection of the clamping hole falls within the projection of the first sub-inner side surface 121.

[0062] The clamping hole is arranged on the second side wall 12, and the protrusion is arranged on the first side wall 22. During the installation of the upper cover 1 on the base 2, the outwardly inclined second sub-inner side surface 122 reduces the impact force of the protrusion on the upper cover 1, and reduces the damage of the upper cover 1.

[0063] Along the first direction X, the projection of the clamping hole falls within the projection of the first sub-inner side surface 121. Specifically, the second side wall 12 can include a first segment and a second segment connected together, the first segment is connected to the second bottom wall 11, the inner side surface of the first segment is the first sub-inner side surface 121, the inner side surface of the second segment is the second sub-inner side surface 122, and the second segment is outwardly inclined and arranged at an angle with the first segment. The clamping hole is arranged in the first segment.

[0064] That is, the clamping hole only penetrates the first sub-inner side surface 121 and the first outer side surface 123, and no clamping hole is arranged on the second sub-inner side surface 122 and the first outer side surface 123 corresponding to the second sub-inner side surface 122. When the upper cover 1 is connected with the base 2, the connection between the upper cover 1 and the base 2 is more firm.

[0065] If the clamping hole has a portion penetrating the second sub-inner side surface 122 and the first outer side surface 123, when the upper cover 1 is connected with the base 2, the clamping connection will not be firm. Therefore, the clamping hole is only arranged on the portion corresponding to the first sub-inner side surface 121 and the first outer side surface 123.

[0066] Alternatively, with reference to Figure 3 and Figure 4The first clamping portion 23 is configured as a protrusion, both of the first side walls 22 have second outer sides facing away from each other, and the protrusion is arranged on the second outer side; along the vertical direction Z, the protrusion has a first clamping surface 231 and a second clamping surface 232, the first clamping surface 231 is farther away from the first bottom wall 21 than the second clamping surface 232, and along the direction from top to bottom, the distance between the first clamping surface 231 and the second outer side gradually increases, and the distance between the second clamping surface 232 and the second outer side gradually decreases.

[0067] The first clamping portion 23 is configured as a protrusion, that is, the protrusion is arranged on the first side wall 22, and the clamping hole is arranged on the second side wall 12. During the installation of the upper cover 1 on the base 2, the outwardly inclined second inner side surface 122 reduces the impact force of the protrusion on the upper cover 1, and reduces the damage of the upper cover 1.

[0068] Along the vertical direction Z, the protrusion has a first clamping surface 231 and a second clamping surface 232, the first clamping surface 231 is farther away from the first bottom wall 21 than the second clamping surface 232, that is, along the vertical direction Z, the first clamping surface 231 is located above, and the second clamping surface 232 is located below.

[0069] The first clamping surface 231 and the second clamping surface 232 are directly connected, or the first clamping surface 231 is connected through a small circular arc surface, or a straight plane is connected between the first clamping surface 231 and the second clamping surface 232.

[0070] The first clamping surface 231 and the second clamping surface 232 are both connected with the second outer side at an angle, and along the direction from top to bottom, the distance between the first clamping surface 231 and the second outer side gradually increases, and the distance between the second clamping surface 232 and the second outer side gradually decreases, so that during the installation of the upper cover 1 on the base 2, the upper cover 1 is easily buckled on the protrusion, and the assembly efficiency is improved; during the disassembly of the upper cover 1 from the base 2, the upper cover 1 is also easily slid off the protrusion, and the disassembly efficiency is improved.

[0071] Optionally, the included angle between the first inner side surface 121 and the second inner side surface 122 is 160°-170°.

[0072] Since the first inner side surface 121 is perpendicular to the first direction X, the first inner side surface 121 is a vertical plane, and the included angle between the first inner side surface 121 and the second inner side surface 122 is 160°-170°. That is, the included angle between the second inner side surface 122 and the vertical direction Z is 10°-20°. The included angle between the second inner side surface 122 and the vertical direction Z can be 10°, 15°, 18° or 20°, etc.

[0073] The first sub-inner side surface 121 is arranged at an angle with the second sub-inner side surface 122, and along the direction from top to bottom, the distance between the first sub-inner side surface 121 and the first side wall 22 increases. When the upper cover 1 is detached from the base 2, the second sub-inner side surface 122 provides a force point, facilitating disassembly. And along the direction from top to bottom, the distance between the second sub-inner side surface 122 and the first side wall 22 gradually increases, which is equivalent to that a guide portion is formed below the second side wall 12. When the upper cover 1 is covered on the base 2, the second sub-inner side surface 122 provides a guide for the upper cover 1, reducing the impact force directly borne by the upper cover 1, and further reducing the fracture or damage of the upper cover 1.

[0074] Optionally, referring to Figure 1 and Figure 2 , along the second direction Y, the second side wall 12 comprises a plurality of second sub-side walls 124 arranged at intervals, and at least part of the plurality of second sub-side walls 124 is provided with the second clamping portion 13. The first direction X, the second direction Y and the vertical direction Z are perpendicular to each other.

[0075] At least part of the plurality of second sub-side walls 124 is provided with the second clamping portion 13, that is, the second side wall 12 is provided with one or more second clamping portions 13, which facilitates disassembly while ensuring the connection strength of the upper cover 1 and the base 2.

[0076] Specifically, along the up-down direction, each second side wall 12 comprises a first side and a second side arranged oppositely, and the first side is connected with the bottom wall. A plurality of grooves are arranged on the side wall and arranged at intervals along the second direction Y. Each groove penetrates the edge of the second side and extends from the edge of the second side to the first side, separating the second side wall 12 into a plurality of second sub-side walls 124.

[0077] Along the second direction Y, the second side wall 12 comprises a plurality of second sub-side walls 124, and each second sub-side wall 124 has a spacing therebetween. When the upper cover 1 needs to be detached from the base 2, compared with once unbuckling and locking the entire second side wall 12 and the first side wall 22, the present application can sequentially unbuckle and lock one or more second sub-side walls 124 between the first side wall 22, which is more labor-saving and less likely to damage the upper cover 1.

[0078] Optionally, referring to Figure 1 and Figure 2 , the plurality of second sub-side walls 124 comprises a middle side wall 1241 and two end side walls 1242, and along the second direction Y, the two end side walls 1242 are arranged on both sides of the middle side wall 1241 respectively. Each end side wall 1242 is provided with a second clamping portion 13, and along the second direction Y, the size of the middle side wall 1241 is greater than the size of the end side wall 1242.

[0079] The plurality of second sub-sides 124 include end side walls 1242 on both sides and middle side walls 1241 in the middle, and the size of the middle side walls 1241 is greater than the size of the end side walls 1242 along the second direction Y. The size of the middle side walls 1241 is large, thereby enhancing the overall strength of the upper cover 1.

[0080] Optionally, with reference to Figure 1 、 Figures 2 to 6 The base 2 further comprises a fitting portion 24 and a limiting portion 25, the fitting portion 24 is arranged at the middle region of the first bottom wall 21 and extends downward, and the limiting portion 25 is arranged at the edge of the first bottom wall 21 and extends downward; wherein the third clamping portion 241 is arranged on the fitting portion 24, the crossbeam 4 of the battery shell surrounds the mounting chamber, and along the vertical direction Z, the crossbeam 4 has oppositely arranged crossbeam top wall 41 and crossbeam 4 bottom wall 42, at least part of the fitting portion 24 is located in the mounting chamber, and the third clamping portion 241 abuts against the side of the crossbeam top wall 41 facing the mounting chamber, and the limiting portion 25 abuts against the side of the crossbeam top wall 41 away from the mounting chamber.

[0081] The fitting portion 24 is arranged with the first bottom wall 21 and extends downward into the mounting chamber surrounded by the crossbeam 4 of the battery shell. And in the mounting chamber, the third clamping portion 241 abuts against the side of the crossbeam top wall 41 facing the mounting chamber, limiting the position of the fitting portion 24, so that the fitting portion 24 remains in the mounting chamber.

[0082] Wherein the third clamping portion 241 is configured as a protruding structure, and the two sides along the first direction X and the upper side of the third clamping portion 241 are configured as grooves penetrating the side wall of the fitting portion 24, so that the third clamping portion 241 has elasticity along the second direction Y, and the fitting portion 24 is more easily clamped into the crossbeam 4.

[0083] The limiting portion 25 is arranged with the first bottom wall 21 and extends downward, and when the base 2 is installed on the crossbeam 4, the lower edge of the limiting portion 25 abuts against the side of the crossbeam top wall 41 away from the mounting chamber. It should be understood that the limiting portion 25 can be arranged on the outer circumferential edge of the first bottom wall 21 along the circumferential direction of the first bottom wall 21; or along the first direction X, the limiting portion 25 is arranged on the opposite sides of the first bottom wall 21; or along the second direction Y, the limiting portion 25 is arranged on the opposite sides of the first bottom wall 21.

[0084] In the vertical direction Z, the limiting part 25 is spaced apart from the third clamping part 241, and the limiting part 25 and the third clamping part 241 are respectively located on opposite sides of the top wall 41 of the cross beam, the limiting part 25 and the third clamping part 241 jointly limit the position of the fitting part 24 installed on the cross beam 4, and make the fixing of the base 2 more firm and reliable. At the same time, the limiting part 25 can limit the distance between the first bottom wall 21 and the top wall 41 of the cross beam, control the first bottom wall 21 at a predetermined height, so that the cross-connection bus bars 3 between the battery modules are maintained at the same height in the up-down direction.

[0085] In one embodiment, the first bottom wall 21 has a threaded hole, and the threaded hole extends from the first bottom wall 21 into the fitting part 24, and a plurality of connected bus bars 3 are fitted into the threaded hole by bolts and fixed on the base 2.

[0086] The fitting part 24 is configured as a square structure, which can reduce the rotation of the base 2 during the process of tightening the bolts to fix the bus bars 3.

[0087] Optionally, along the first direction X, the two first side walls 22 are arranged between the two second side walls 12; the two first side walls 22 each have a second inner side face 221 facing each other, and the second inner side face 221 is configured as a plane and is perpendicular to the first direction X.

[0088] Along the first direction X, the two first side walls 22 are oppositely arranged, and the two second side walls 12 are oppositely arranged, and each first side wall 22 is clamped and fitted with a corresponding second side wall 12. The two first side walls 22 each have a second inner side face 221 facing each other, and the second inner side face 221 is configured as a plane and is perpendicular to the first direction X. When the bolts are tightened to fasten the plurality of bus bars 3 to the base 2, the second inner side face 221 can stop the bus bars 3 from rotating, which is equivalent to increasing the overlap area between the bus bars 3, reducing the impedance, and making the installation of the bus bars 3 more reliable.

[0089] In one embodiment, the second bottom wall 11 of the upper cover 1 is also provided with a plurality of reinforcing ribs 14 to strengthen the strength of the upper cover 1.

[0090] In a second aspect, the embodiments of the present application provide a battery device comprising the bus bar 3 connection protection device described in any of the above embodiments. The use of the bus bar 3 connection protection device can make the connection of the bus bars 3 of the plurality of battery modules firm and reliable, while increasing the overlap area of the bus bars 3 and reducing the impedance.

[0091] In the application, the base 2 comprises two first side walls 22, the upper cover 1 comprises two second side walls 12, each first side wall 22 is connected with the corresponding second side wall 12 through buckling connection, since the structure of the second side wall 12 of the upper cover 1 and the first side wall 22 of the base 2 is arranged in the same position, it can prevent mistakes in the field assembly process, reduce installation errors, rework and improve installation efficiency.

[0092] The second side wall 12 has a first sub-inner side 121 and a second sub-inner side 122, the first sub-inner side 121 and the second sub-inner side 122 are angled, and the distance between the second sub-inner side 122 and the first side wall 22 gradually increases from top to bottom, forming a guide, facilitating the installation of the upper cover 1 and the base 2, and also facilitating disassembly.

[0093] The first bottom wall 21 of the base 2 is also provided with a limiting portion 25 extending downward, the limiting portion 25 and the matching portion 24 jointly limit the installation position of the base 2, so that the base 2 can be firmly installed on the cross beam 4 of the battery shell, the connection is safe and reliable, and the base 2 is not easy to be separated from the cross beam 4.

[0094] It should also be noted that the terms "comprising", "containing", or any other variant thereof are intended to cover non-exclusive inclusions, so that a process, method, article or device that includes a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such a process, method, article or device. Without more limitations, the element defined by the statement "including a" does not exclude the presence of other identical elements in the process, method, article or device that includes the element.

[0095] Each of the embodiments in the specification is described in a progressive manner, and the same and similar parts between the embodiments can be referred to each other. Each embodiment focuses on the difference from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the part of the method embodiment.

[0096] The above only describes the embodiments of the application and is not intended to limit the application. Those skilled in the art can make various modifications and changes to the application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the application shall be included in the scope of the claims of the application.

[0097] Although the embodiments of the application are described in conjunction with the drawings, those skilled in the art can make various modifications and changes without departing from the spirit and scope of the application, and such modifications and changes fall within the scope defined by the appended claims.

Claims

1. A busbar connection protection device, characterized in that The utility model relates to a base and upper cover for fixing busbar, comprising: a base comprising a first bottom wall and two first side walls, the two first side walls are oppositely and spacedly arranged at two ends of the first bottom wall along a first direction, and a first clamping part is arranged on each of the first side walls, and the first direction is perpendicular to a vertical direction; an upper cover comprising a second bottom wall and two second side walls, the two second side walls are oppositely and spacedly arranged at two ends of the second bottom wall along the first direction, a second clamping part is arranged on each of the second side walls, and the second clamping part on each of the second side walls is adapted to be clamped and matched with the first clamping part of the corresponding first side wall to fix the upper cover to the base and enclose an installation space for installing busbars; wherein, the two second side walls each have a first inner side face facing each other, the first inner side face comprises a first sub-inner side face and a second sub-inner side face along the vertical direction, the second sub-inner side face is farther away from the second bottom wall than the first sub-inner side face, the first sub-inner side face is perpendicular to the first direction, and the second sub-inner side face is inclined outward to be arranged at an angle with the first sub-inner side face.

2. The busbar connection protection device of claim 1, wherein, One of the first clamping part and the second clamping part is a clamping hole, and the other of the first clamping part and the second clamping part is a protrusion.

3. The busbar connection protection device of claim 2, wherein, The two second side walls each have a first outer side face facing away from each other, the second clamping part is configured as a clamping hole, an axis of the clamping hole is parallel to the first direction, the clamping hole penetrates the first sub-inner side face and the first outer side face along the first direction, and a projection of the clamping hole falls within a projection of the first sub-inner side face.

4. The busbar connection protection device of claim 2, wherein, The first clamping part is configured as a protrusion, the two first side walls each have a second outer side face facing away from each other, and the protrusion is arranged on the second outer side face; along the vertical direction, the protrusion has a first clamping face and a second clamping face, the first clamping face is farther away from the first bottom wall than the second clamping face, and from top to bottom, a distance between the first clamping face and the second outer side face gradually increases, and a distance between the second clamping face and the second outer side face gradually decreases.

5. The busbar connection protection device of claim 1, wherein, An included angle between the first sub-inner side face and the second sub-inner side face is 160-170 degrees.

6. The busbar connection protection device of claim 1, wherein along a second direction, the second side wall comprises a plurality of second sub-side walls arranged at intervals, at least part of the plurality of second sub-side walls is provided with the second clamping part, and the first direction, the second direction and the vertical direction are perpendicular to each other.

7. The busbar connection protection device of claim 6, wherein, The plurality of second sub-side walls comprises a middle side wall and two end side walls, and the two end side walls are arranged on two sides of the middle side wall along the second direction; a second clamping part is arranged on each of the end side walls, and a size of the middle side wall is greater than a size of the end side wall along the second direction.

8. The busbar connection protection device of claim 1, wherein, The base further comprises a matching part and a limiting part, the matching part is arranged in a middle region of the first bottom wall and extends downward, and the limiting part is arranged at an edge of the first bottom wall and extends downward. The third clamping portion is arranged on the fitting portion, the beam of the battery shell surrounds the mounting chamber, and the beam has oppositely arranged beam top walls and beam bottom walls in the vertical direction. At least part of the fitting portion is located in the mounting chamber, and the third clamping portion abuts against the side of the beam top wall facing the mounting chamber, and the limiting portion abuts against the side of the beam top wall away from the mounting chamber.

9. The busbar connection protection device of claim 1, wherein, In the first direction, the two first side walls are arranged between the two second side walls. The two first side walls each have a second inner side facing each other, and the second inner side is configured as a plane, and the second inner side is perpendicular to the first direction.

10. A battery device characterized by comprising: The busbar connection protection device of any one of claims 1-9 is included.

Images