CN218385645U - Battery device - Google Patents

Abstract

The present disclosure relates to the field of battery technology, and in particular to a battery device, the battery device comprising: the battery pack comprises a plurality of batteries, the batteries in the battery pack are arranged along a second direction, the batteries are provided with polar columns, the polar columns are positioned on first surfaces of the batteries, the first surfaces of the batteries are vertical to the second direction, and the first direction is vertical to the second direction; the busbar includes main part, first connecting portion and second connecting portion, the main part is located the lateral part of first direction is followed to the group battery, first connecting portion with the second connecting portion connect in the main part is close to one side of group battery, the utmost point post of a battery in the first group battery is connected to first connecting portion, the utmost point post of a battery in the second group battery is connected to the second connecting portion.

Description

Battery device

Technical Field

The present disclosure relates to the field of battery technologies, and particularly, to a battery device.

Background

As the technology develops and the electric vehicle is increasingly widely used, energy is generally supplied from a battery device in the electric vehicle. A plurality of batteries are often included in the battery device, and the plurality of batteries are connected by a bus bar. In the related art, in order to ensure the overcurrent capacity of the bus bar, the bus bar has a large volume, and therefore, the bus bar occupies much space in the battery device, resulting in a low space utilization rate in the battery device.

It is to be noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present disclosure, and thus may include information that does not constitute prior art known to those of ordinary skill in the art.

Disclosure of Invention

The present disclosure is directed to a battery device, and further, to improve the space utilization in the battery device at least to some extent.

The present disclosure provides a battery device, including:

the battery pack comprises a plurality of batteries, the batteries are arranged along a second direction, the batteries are provided with polar columns, the polar columns are positioned on the first surfaces of the batteries, the first surfaces of the batteries are vertical to the second direction, and the first direction is vertical to the second direction;

the busbar, the busbar includes main part, first connecting portion and the second connecting portion, the main part is located the lateral part of first direction is followed to the group battery, first connecting portion with the second connecting portion connect in the main part is close to one side of group battery, the utmost point post of a battery in the first group battery is connected to first connecting portion, the utmost point post of a battery in the second group battery is connected to the second connecting portion, first group battery with the second group battery is adjacent group battery among the battery device.

According to the battery device provided by the embodiment of the disclosure, the adjacent battery packs are connected through the bus bar, the main body part of the bus bar is arranged on the side part of the battery pack along the first direction, the first connecting part and the second connecting part are arranged on one side of the main body part facing the battery pack, the first connecting part and the second connecting part are used for connecting the pole posts, the space utilization rate of the battery device is improved, and the overcurrent capacity of the bus bar can be improved through the main body part, the first connecting part and the second connecting part.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the disclosure. It should be apparent that the drawings in the following description are merely examples of the disclosure and that other drawings may be derived by those of ordinary skill in the art without inventive effort.

Fig. 1 is a schematic structural diagram of a first battery device provided in an exemplary embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of a second battery device provided in an exemplary embodiment of the present disclosure;

fig. 3 is a schematic structural diagram of a bus bar provided in an exemplary embodiment of the present disclosure;

fig. 4 is a schematic structural diagram of a battery provided in an exemplary embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of a third battery device according to an exemplary embodiment of the present disclosure.

Detailed Description

The technical solutions in the exemplary embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the exemplary embodiments of the present disclosure. The example embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present disclosure, and it is, therefore, to be understood that various modifications and changes may be made to the example embodiments without departing from the scope of the present disclosure.

In the description of the present disclosure, unless otherwise explicitly specified or limited, the terms "first", "second", and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more; the term "and/or" includes any and all combinations of one or more of the associated listed items. In particular, reference to "the" object or "an" object is also intended to mean one of many such objects possible.

The terms "connected," "secured," and the like are to be construed broadly and unless otherwise stated or indicated, and for example, "connected" may be a fixed connection, a removable connection, an integral connection, an electrical connection, or a signal connection; "connected" may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present disclosure can be understood by those skilled in the art as the case may be.

Further, in the description of the present disclosure, it should be understood that the directional words "upper", "lower", "inner", "outer", etc., which are described in the exemplary embodiments of the present disclosure, are described at the angles shown in the drawings, and should not be construed as limiting the exemplary embodiments of the present disclosure. It will also be understood that, in this context, when an element or feature is referred to as being "on", "under", or "inner", "outer" with respect to another element(s), it can be directly on "," under ", or" inner "," outer "with respect to the other element(s), or indirectly on", "under", or "inner", "outer" with respect to the other element(s) via intervening elements.

The disclosed embodiment provides a battery device, as shown in fig. 1, 2, 3 and 4, the battery device including: at least two battery packs 10 and a busbar 20, wherein the at least two battery packs 10 are arranged along a first direction (X direction), the battery pack 10 comprises a plurality of batteries 100, the plurality of batteries 100 in the battery pack 10 are arranged along a second direction (Y direction), the batteries 100 are provided with poles 101, the poles 101 are positioned on first surfaces 103 of the batteries 100, the first surfaces 103 of the batteries 100 are perpendicular to the second direction, and the first direction is perpendicular to the second direction; the busbar 20 includes a main portion 21, a first connection portion 22, and a second connection portion 23, the main portion 21 is disposed on a side portion of the battery pack 10 along the first direction, the first connection portion 22 and the second connection portion 23 are connected to a side of the main portion 21 close to the battery pack 10, the first connection portion 22 is connected to a pole 101 of a battery 100 in the first battery pack 11, the second connection portion 23 is connected to a pole 101 of a battery 100 in the second battery pack 12, and the first battery pack 11 and the second battery pack 12 are adjacent battery packs in the battery device.

According to the battery device provided by the embodiment of the disclosure, the bus bar 20 is used for connecting adjacent battery packs 10, the main body part 21 of the bus bar 20 is arranged on the side part of the battery pack 10 along the first direction, the first connecting part 22 and the second connecting part 23 are arranged on one side of the main body part 21 facing the battery pack 10, and the first connecting part 22 and the second connecting part 23 are used for connecting the pole 101, so that the space utilization rate in the battery device is improved, and the overcurrent capacity of the bus bar 20 can be improved through the main body part 21, the first connecting part 22 and the second connecting part 23.

Further, as shown in fig. 5, the battery device provided in the embodiment of the present disclosure may further include a case 40 and a case cover (not shown), where the case cover is hermetically connected to the case 40, and an accommodating space is formed between the case 40 and the case cover. The battery pack 10 and the bus bar 20 are disposed in the accommodating space.

The following will explain each part of the battery device provided by the embodiment of the present disclosure in detail:

the case 40 may include a base plate 41 and a frame 42, the frame 42 being coupled to the base plate 41, and the frame 42 surrounding the base plate 41. The frame 42 forms an accommodation space in which the battery pack 10 is disposed on the top surface side of the bottom plate 41. The frame 42 and the base plate 41 may be connected by one or more of welding, bolting, riveting and gluing.

Wherein the bottom plate 41 may be a cold plate. That is, a cooling medium channel for conveying a cooling medium may be provided in the bottom plate 41. The battery 100 is provided on the bottom plate 41, and heat generated from the battery is transmitted to the outside of the battery device by the cooling medium in the bottom plate 41. Of course, in practical applications, the bottom plate 41 may also be a solid bottom plate, and a cold plate may be disposed between the bottom plate 41 and the battery at this time, which is not specifically limited in the embodiment of the present disclosure.

Illustratively, the bottom plate 41 may be a rectangular or approximately rectangular plate. A plurality of batteries 100 are provided on the top surface of the bottom plate 41. When the bottom plate 41 is a solid bottom plate, a cavity may be disposed in the bottom plate 41, and the cavity is used for accommodating and guiding gas generated by the explosion of the battery 100.

The frame 42 is connected to the base plate 41, and an accommodation space is formed in the base plate 41, in which the battery 100 is disposed. The frame 42 may surround the bottom plate 41, and the top of the frame 42 is higher than the top of the bottom plate 41, so that an accommodating space is formed at the top of the bottom plate 41. Or the frame 42 may be disposed on the top of the bottom plate 41 and enclose an accommodating space on the top of the bottom plate 41. The frame 42 and the base plate 41 may be connected by one or more of welding, bolting, riveting, gluing, etc.

By way of example, the bezel 42 may have a rectangular or near-rectangular configuration. The frame 42 may include a first edge beam, a second edge beam, a third edge beam, and a fourth edge beam, which are connected end to end in sequence. For example, the first and third side beams may be disposed along a long side of the bottom plate 41, and the second and fourth side beams may be disposed along a short side of the bottom plate 41.

The cover may be bolted, welded, riveted, glued, etc. to the housing 40. In order to improve the sealing performance between the cover and the box 40, a sealing member may be disposed on a top surface of the frame 42, and when the cover is coupled to the frame 42, the cover compresses the sealing member to seal the box 40 and the cover.

At least two battery packs 10 are included in the battery device, the at least two battery packs 10 are provided on the bottom plate 41, and the battery packs 10 are arranged in a first direction, which is parallel to the bottom plate 41. For example, the battery packs 10 may be sequentially arranged along the long sides of the bottom plate 41, or the battery packs 10 may be sequentially arranged along the end edges of the bottom plate 41.

The battery pack 10 may include a plurality of cells 100, and the plurality of cells 100 may be stacked in a second direction perpendicular to the bottom plate 41. The cells 100 have at least two opposing first surfaces 103, with the first surfaces 103 of adjacent cells 100 being oppositely disposed when the cells 100 are stacked. The first surface 103 of the battery 100 is perpendicular to the second direction, i.e., the first surface 103 of the battery 100 and the bottom plate 41 are disposed in parallel.

For example, the battery 100 in the embodiment of the present disclosure may be a rectangular parallelepiped or an approximately rectangular parallelepiped structure, the battery 100 includes two opposing first surfaces 103 and four second surfaces 104 disposed around the first surfaces 103, and an area of the first surfaces 103 is larger than an area of the second surfaces 104. That is, the first surface 103 of the battery 100 is a large surface of the battery 100, and the batteries 100 are stacked on a large surface in the battery pack 10. The post 101 is disposed on a first surface 103 of the battery 100, and the post 101 is located on the first surface 103 of the battery 100 remote from the base plate 41. The terminal post 101 protrudes from a first surface 103 of the battery 100 away from the bottom plate 41.

The plurality of cells 100 in the battery pack 10 are sequentially arranged, and the plurality of cells 100 may be connected to each other. The first surfaces 103 of the adjacent batteries 100 may be coated with a glue, and the plurality of batteries 100 may be connected by a connection glue.

Two surfaces of the battery 100 at two ends in the second direction are respectively provided with a pole 101 and a recessed portion 102, and the recessed portion 102 is used for avoiding the pole 101 on the adjacent battery 100. Illustratively, the battery 100 may include a battery body and a terminal post 101, wherein the terminal post 101 is disposed on a surface of the battery body, and a recess 102 is disposed on a surface of the battery body facing away from the terminal post 101. The recess 102 extends from one side of the cell body, which is the second surface 104 that is anti-parallel to the length of the cell 100, to the other side of the cell body, and the recess 102 may or may not extend through the cell body. And the recess 102 may be provided at the end of the battery body near the bus bar 20. That is, the recessed portion 102 may be provided at a portion where the first surface 103 of the battery body is in contact with an end surface of the battery body, which is a second surface 104 of the battery body opposite to the bus bar 20.

The recess 102 is disposed on a first surface 103 of the battery body facing the bottom plate 41, and the terminal 101 is disposed on the first surface 103 of the battery body facing away from the bottom plate 41. The depth of the recess 102 on the battery body is greater than the height of the post 101. That is, when the plurality of batteries 100 are arranged in sequence, there is a gap between the pole 101 of the second battery 100 and the bottom wall of the recess 102 of the first battery 100, which gap can prevent the first battery 100 and the second pole 101 from interfering and achieve insulation of the pole 101 of the first battery 100 and the case of the second battery 100.

In practical applications, the terminal post 101 can also be disposed on the first surface 103 of the battery body close to the bottom plate 41, and the recessed portion 102 is disposed on the first surface 103 of the battery body far from the bottom plate 41, which is not limited in the embodiment of the disclosure.

In some embodiments, two poles 101 may be disposed on the battery 100, the two poles 101 are a positive pole 101 and a negative pole 101, the positive pole 101 and the negative pole 101 are disposed on a first surface 103 of the battery body away from the bottom plate 41, and the positive pole 101 and the negative pole 101 are disposed at two ends of the battery body. Correspondingly, two recesses are provided on the side of the battery body facing the bottom plate 41, and the two recesses are respectively located at two ends of the battery body.

The battery body can wrap an electric core and a shell, the electric core is provided with two lugs, the two lugs are respectively an anode lug and a cathode lug, the anode post 101 is connected with the anode lug, and the cathode post 101 is connected with the cathode lug.

It should be noted that the pole 101 is insulated from the housing, for example, the pole and the housing may be insulated by an insulating member, or may be insulated by an insulating coating, which is not limited herein and may be selected according to actual requirements.

The embodiment of the present disclosure provides a battery 100, wherein a flange 105 is provided at the peripheral edge of the battery body, and the flange 105 is used for providing a welding space when the battery 100 is formed. The flange 105 is provided mainly to ensure an increased welding area and thus to improve the stability of the welding.

Here, the flange 105 may be understood as a flange, for example, a flange formed to extend outward from a circumferential outer edge of a flat plate, or a flange formed to extend outward from a sidewall of a structure having a receiving cavity, where the flange is substantially perpendicular to the sidewall. The flange 105 for the above embodiments may be provided at the edge of the first surface 103 of the battery body, for example, the flange 105 may be provided at the edge of the first surface 103 of the battery body away from the bottom plate 41, or the flange 105 may be provided at the edge of the first surface 103 of the battery body close to the bottom plate 41.

The bus bar 20 is used to connect two adjacent battery packs 10. In one possible embodiment of the present disclosure, a plurality of batteries 100 are electrically connected (e.g., in series or in parallel) in a battery pack 10 to form a battery 100 string, and the bus bar 20 may be connected to the batteries 100 at the end of the battery 100 string. For example, in the battery pack 10, the plurality of batteries 100 are connected in series in sequence from the battery 100 far from the bottom plate 41, and the bus bar 20 is connected to the pole 101 of the battery 100 near the bottom plate 41 in the battery pack 10.

A bus bar 30 may be further included in one battery pack 10, and the bus bar 30 is used to connect adjacent batteries 100 in one battery pack 100. The bus bar 30 connects the poles 101 of the two adjacent batteries 100, respectively, and the bus bar 30 is provided with an avoidance space that avoids interference between the bus bar 30 and the ends of the batteries 100.

In another possible embodiment of the present disclosure, the plurality of batteries 100 in the first battery pack 11 and the second battery pack 12 are connected by the bus bar 20 provided in the embodiment of the present disclosure. A plurality of sequentially arranged battery packs 10 in a battery device form a battery array, the battery array includes a plurality of layers of batteries 100, each layer of batteries 100 includes a plurality of batteries 100, and adjacent batteries 100 in each layer of batteries 100 are connected by a bus bar 20 provided in the embodiment of the disclosure.

The busbar 20 includes a main body 21, a first connection portion 22, and a second connection portion 23, the main body 21 is disposed on a side portion of the battery pack 10 along the first direction, the first connection portion 22 and the second connection portion 23 are connected to a side of the main body 21 close to the battery pack 10, the first connection portion 22 is connected to a pole 101 of one battery 100 in the first battery pack 11, the second connection portion 23 is connected to a pole 101 of one battery 100 in the second battery pack 12, and the first battery pack 11 and the second battery pack 12 are adjacent battery packs 10 in the battery device.

The body 21 is provided at a side portion of the battery pack 10 in the first direction, that is, the body 21 is provided at an end portion of the battery 100 in the longitudinal direction. The main body portion 21 may have a rectangular or approximately rectangular plate-like structure, the main body portion 21 extends in the first direction, and the first main body portion 21 and the end surface of the battery 100 are arranged in parallel (the main body portion 21 is perpendicular to the bottom plate 41). Both ends of the main body 21 in an orthogonal projection on the battery pack 10 overlap with the corresponding pole 101 of the first battery pack 11 and the corresponding pole 101 of the second battery pack 12, respectively.

The main body portion 21 is provided with a buffer structure 211, and the buffer structure 211 is used for providing buffer when the battery device is manufactured and used. For example, when there is an error in the manufacturing process of the bus bar 20 or the battery pack 10, there may be a problem that the bus bar 20 may not be aligned when mounted, and at this time, the manufacturing error may be compensated by the deformation of the buffer portion. Or in the installation and use process of the battery device, the two battery packs 10 may apply forces to the bus bar 20 from different directions, so as to pull or compress the bus bar 20, thereby causing the connection failure of the bus bar 20 and the pole 101, and at this time, the deformation of the buffer part can also compensate the displacement difference, thereby avoiding the connection failure of the bus bar 20 and the pole 101.

The buffer structure 211 may be a buffer groove disposed on the main body 21, and the buffer groove may be recessed toward a side of the main body 21 facing the battery pack 10. For example, the buffer groove is formed in the main body 21 by pressing or the like.

The buffer groove may extend in the second direction, and the buffer groove extends from a top of the main body portion 21 to a bottom of the main body portion 21, the top of the main body portion 21 being an end of the main body portion 21 away from the bottom plate 41, and the bottom of the main body portion 21 being an end of the main body portion 21 close to the bottom plate 41.

The first battery pack 11 and the second battery pack 12 are adjacent to each other, a predetermined interval is provided between the first battery pack 11 and the second battery pack 12, and the buffer groove may be disposed at a position on the main body portion 21 corresponding to the interval between the first battery pack 11 and the second battery pack 12. For example, the main body 21 may have an axisymmetric structure, and the buffer groove may be provided at the symmetry axis of the main body 21. For example, the main body may have a rectangular or similar configuration, and the buffer groove is provided at a center line of the main body 21.

When the batteries 100 in the embodiment of the present disclosure have the flanges 105, the bus bar 20 may be provided between the flanges 105 of the adjacent two batteries 100. And the main body part 21 does not protrude out of the outermost end of the flange 105, that is, the bus bar 20 occupies the space between the flanges 105 of the battery 100, and does not additionally occupy the space of the battery device along the length direction of the battery 100, thereby further improving the space utilization rate inside the battery device.

Further, the bus bar 20 provided by the embodiment of the present disclosure may further include: a first bending portion 24 and a second bending portion 25, wherein the first bending portion 24 is connected with the main body portion 21, the first bending portion 24 extends towards one side of the main body portion 21 close to the battery pack 10, and the first connecting portion 22 is connected with one end of the first bending portion 24 far away from the main body portion 21; the second bending portion 25 is connected to the main body portion 21, the second bending portion 25 extends toward a side of the main body portion 21 close to the battery pack 10, and the second connecting portion 23 is connected to an end of the second bending portion 25 away from the main body portion 21.

The first bent portion 24 may be disposed perpendicular to the main body portion 21, that is, the first bent portion 24 is parallel to the bottom plate 41. The second bending portion 25 may be disposed perpendicular to the main body portion 21, that is, the second bending portion 25 is parallel to the bottom plate 41. The first and second bent portions 24 and 25 are located on the same plane.

The first connection portion 22 and the second connection portion 23 are each disposed in parallel with the main body portion 21. First connection portion 22 is parallel to a side surface of battery 100 facing main body portion 21, and second connection portion 23 is parallel to a side surface of battery 100 facing main body portion 21. The first connection portion 22 and the second connection portion 23 extend into the recessed portion 102 of the battery 100 and are connected to the poles 101 corresponding to the recessed portion 102.

The pole 101 protrudes from a first surface 103 of the battery 100 away from the base plate 41, the first connection portion 22 is connected to an outer side surface of the corresponding pole 101, the outer side surface of the pole 101 is a surface of the pole 101 facing the body portion 21, and the second connection portion 23 is connected to an outer side surface of the corresponding pole 101.

For example, the pole post 101 may be a rectangular parallelepiped structure, the outer side surface of the pole post 101 is parallel to the end surface of the battery 100, the length of the first connection portion 22 in the second direction is equal to the length of the pole post 101 in the second direction, and the length of the second connection portion 23 in the second direction is equal to the length of the pole post 101 in the second direction.

It is understood that the pole 101 in the embodiment of the present disclosure may also be a pole 101 with other structures, and this is not particularly limited in the embodiment of the present disclosure. For example, in order to increase the contact area between the pole 101 and the bus bar 20 and control the overall weight of the pole 101, the pole 101 may be a pole 101 having an L-shaped cross section.

The pole 101 may include a first conductive segment and a second conductive segment, the first conductive segment is of a rectangular parallelepiped structure, the second conductive segment is also of a rectangular parallelepiped structure, the first conductive segment is connected to the second conductive segment, and the first conductive segment is perpendicular to the second conductive segment. The first conductive segment is connected to the first surface 103 of the battery 100 and the second conductive segment is connected to the bus bar 20.

The first connection portion 22 is connected to the main body portion 21 by a first bent portion 24, and the second connection portion 23 is connected to the main body portion 21 by a second bent portion 25. The interval is arranged between the first connecting portion 22 and the second connecting portion 23, the weight of the bus bar 20 can be reduced, the weight of the whole battery device is reduced, and the energy density of the battery device is improved.

On this basis, the first bent portion 24 and the second bent portion 25 have a space therebetween. The length of the first bending portion 24 may be identical to that of the first connecting portion 22, and the length of the second bending portion 25 may be identical to that of the second connecting portion 23.

It should be noted that, in the embodiment of the present disclosure, the bus bar 20 may be an integrally formed structure, and the integrally formed bus bar is convenient to process, and can improve the production efficiency of the battery device. For example, the main body portion 21, the first connection portion 22, the second connection portion 23, the first bent portion 24, and the second bent portion 25 of the bus bar 20 may be formed by punching a plate material. Of course, in practical applications, the bus bar 20 may also be a split structure, and the embodiment of the present disclosure is not limited thereto.

In order to facilitate the positioning of the bus bar 20 and the pole 101 during the installation, the first connecting portion 22 is provided with a first positioning hole 26, the second connecting portion 23 is provided with a second positioning hole 27, and the first positioning hole 26 and the second positioning hole 27 are matched to realize the positioning of the bus bar 20 and the battery pack 10.

One or more first positioning holes 26 may be disposed on the first connecting portion 22, and when the first connecting portion 22 is provided with a plurality of first positioning holes 26, the plurality of first positioning holes 26 may be arranged along a first direction. One or more second positioning holes 27 are provided on the second connection portion 23. When the second connecting portion 23 is provided with the plurality of second positioning holes 27, the plurality of second positioning holes 27 are arranged in the first direction.

When the bus bar 20 is positioned by the first positioning hole 26 and the second positioning hole 27, a part of the first positioning hole 26 and the second positioning hole 27 may be used as a main positioning hole, and the remaining part of the first positioning hole 26 and the second positioning hole 27 may be used as an auxiliary positioning hole.

On the basis, a positioning mark is arranged on the outer side surface of the pole 101, and the positioning mark is used for being matched with a positioning hole in the busbar 20 to realize positioning. For example, the positioning mark may be a protrusion disposed on the outer side surface of the pole 101, and the protrusion can extend into the positioning hole on the busbar 20. Alternatively, the positioning mark may be a mark such as a notch provided on the outer side surface of the post 101, and the positioning hole on the bus bar 20 exposes the positioning mark after the bus bar 20 and the battery pack 10 are aligned.

In a possible implementation manner of the disclosed embodiment, the first connection portion 22 is welded to the pole 101 of the battery 100 in the first battery pack 11, and the second connection portion 23 is welded to the pole 101 of the battery 100 in the second battery pack 12. For example, the first connection portion 22 and the corresponding terminal 101 are connected by laser welding, and the second connection portion 23 and the corresponding terminal 101 are connected by laser welding. Of course, in practical applications, the first connection portion 22 and the terminal post 101, and the second connection portion 23 and the terminal post 101 may be connected by other welding methods, such as resistance welding, arc welding, etc.

The first connection portion 22 may be provided with a first welding region for welding with the pole 101, and the second connection portion 23 may be provided with a second welding region for welding with the pole 101. Illustratively, the first land may be provided at a middle portion of the first connection portion 22, and first positioning holes 26 are provided at both ends of the first land on the first connection portion 22. The second land may be provided at the middle of the second connection portion 23, and second positioning holes 27 are provided at both ends of the second land on the second connection portion 23.

In other feasible embodiments of the present disclosure, the first connection portion 22 and the corresponding pole 101 may also be connected by a bolt connection, a rivet connection, or an adhesive connection, and the second connection portion 23 and the corresponding pole 101 are connected by a bolt connection, a rivet connection, or an adhesive connection, which is not specifically limited in this embodiment of the present disclosure.

In the disclosed embodiment, a cold plate may be provided at the bottom of the battery array formed by the battery pack 10. Alternatively, a cold plate may be provided on top of the battery array, i.e. on the side of the battery array remote from the base plate 41. Or cold plates may be provided on both the top and bottom surfaces of the battery array.

According to the battery device provided by the embodiment of the disclosure, the bus bar 20 is used for connecting adjacent battery packs 10, the main body part 21 of the bus bar 20 is arranged on the side part of the battery pack 10 along the first direction, the first connecting part 22 and the second connecting part 23 are arranged on one side of the main body part 21 facing the battery pack 10, and the first connecting part 22 and the second connecting part 23 are used for connecting the pole 101, so that the space utilization rate in the battery device is improved, and the overcurrent capacity of the bus bar 20 can be improved through the main body part 21, the first connecting part 22 and the second connecting part 23.

The battery device provided by the embodiment of the disclosure can be applied to an electric vehicle, and when the battery is used for the electric vehicle, the battery device can be a battery pack which is installed on the electric vehicle and provides energy for the electric vehicle.

In practical applications, the battery pack may be mounted to a frame of an electric vehicle. The battery pack can be fixedly connected with the frame. Or the battery pack can be a modular battery pack which can be detachably connected to the vehicle body, so that the battery pack is convenient to replace.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

Claims (11)

1. A battery device, characterized in that the battery device comprises:

the battery pack comprises a plurality of batteries, the batteries are arranged along a second direction, the batteries are provided with polar columns, the polar columns are positioned on the first surfaces of the batteries, the first surfaces of the batteries are vertical to the second direction, and the first direction is vertical to the second direction;

the busbar, the busbar includes main part, first connecting portion and second connecting portion, the main part is located the lateral part of first direction is followed to the group battery, first connecting portion with the second connecting portion connect in the main part is close to one side of group battery, the utmost point post of a battery in the first group battery is connected to first connecting portion, the utmost point post of a battery in the second group battery is connected to the second connecting portion, first group battery with the second group battery does adjacent group battery among the battery device.

2. The battery device of claim 1, wherein the battery comprises two opposing first surfaces and four second surfaces disposed around the first surfaces, the first surfaces having an area greater than an area of the second surfaces.

3. The battery device of claim 1, wherein the buss bar further comprises:

the first bending part is connected with the main body part, the first bending part extends towards one side of the main body part close to the battery pack, and the first connecting part is connected to one end of the first bending part far away from the main body part;

the second bending part, the second bending part with the main part is connected, and the second bending part extends to the one side that the main part is close to the group battery, the second connecting portion connect in the second bending part is kept away from the one end of main part.

4. The battery device according to claim 3, wherein the first connection portion and the second connection portion are each disposed in parallel with the main body portion.

5. The battery device according to claim 3, wherein the first connection portion and a side surface of the battery facing the main body portion are parallel, and the second connection portion and a side surface of the battery facing the main body portion are parallel.

6. The battery device of claim 5, further comprising a base plate, wherein the battery is assembled on the base plate, and the terminal protrudes from a first surface of the battery away from the base plate;

the first connecting portion are connected to the outer side face of the pole corresponding to the first connecting portion, the outer side face of the pole faces towards the main body portion, and the second connecting portion are connected to the outer side face of the pole corresponding to the second connecting portion.

7. The battery device according to claim 1, wherein the first connection portion and the second connection portion have a space therebetween.

8. The battery device of claim 1, wherein the body portion is provided with a cushioning structure.

9. The battery device according to claim 8, wherein the buffer structure is a buffer groove provided on the main body portion, and the buffer groove is recessed toward a side close to the battery pack.

10. The battery device according to claim 1, wherein a first positioning hole is provided in the first connecting portion, and a second positioning hole is provided in the second connecting portion, the first positioning hole and the second positioning hole being used for positioning the bus bar and the battery pack.

11. The battery device of any of claims 1-10, wherein the buss bar is of an integrally formed construction.

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