CN219303758U - Battery device - Google Patents

Abstract

The present disclosure relates to the field of battery technology, and in particular, to a battery device, including: a battery and a cold plate, the battery having a first surface and at least one second surface, the second surface intersecting the first surface; the cold plate comprises a cold plate body and a heat exchange structure, wherein the cold plate body is arranged on one side of the battery, the cold plate body is opposite to the first surface of the battery, the heat exchange structure is connected with the cold plate body, and the heat exchange structure at least partially extends to the second surface of the battery. The cold plate can cool at least two surfaces of the battery, so that the cooling capacity of the cold plate to the battery is improved, the temperature in the battery device can be effectively reduced, and the safety of the battery device is improved.

Description

Battery device

Technical Field

The disclosure relates to the technical field of batteries, and in particular relates to a battery device.

Background

Battery devices are often provided in electric vehicles for powering the electric vehicles. A plurality of batteries are provided in the battery device, and the batteries generate heat during charge and discharge, resulting in an increase in the temperature in the battery device. In order to secure the safety of the battery device, a cooling device, such as a liquid cooling plate or the like, is provided in the battery device. At present, a liquid cooling plate in a battery device is often arranged at the bottom of a battery, and the heat dissipation capacity is poor.

It should be noted that the information disclosed in the above background section is only for enhancing 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

An object of the present disclosure is to provide a battery device, and further to at least improve the heat dissipation performance of the battery device to a certain extent.

The present disclosure provides a battery device including:

a battery having a first surface and at least one second surface, the second surface intersecting the first surface;

the cold plate comprises a cold plate main body and a heat exchange structure, wherein the cold plate main body is arranged on one side of the battery, the cold plate main body is opposite to the first surface of the battery, the heat exchange structure is connected with the cold plate main body, and the heat exchange structure at least partially extends to the second surface of the battery.

The battery device provided by the embodiment of the disclosure comprises a battery and a cold plate, wherein the first surface and the second surface of the battery are intersected, the first surface is opposite to the main body of the cold plate, and the second surface is opposite to the heat exchange structure, namely, the cold plate can cool at least two surfaces of the battery, so that the cooling capacity of the cold plate to the battery is improved, the temperature in the battery device can be effectively reduced, and the safety of the battery device is improved.

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 disclosure and together with the description, serve to explain the principles of the disclosure. It will be apparent to those of ordinary skill in the art that the drawings in the following description are merely examples of the disclosure and that other drawings may be derived from them without undue effort.

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

fig. 2 is a schematic structural view of a battery according to an exemplary embodiment of the present disclosure;

FIG. 3 is a schematic view of a cold plate according to an exemplary embodiment of the present disclosure;

fig. 4 is a schematic structural view of a second battery device according to an exemplary embodiment of the present disclosure;

fig. 5 is a schematic structural view 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 accompanying 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, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance unless explicitly specified or limited otherwise; the term "plurality" refers to two or more than two; the term "and/or" includes any and all combinations of one or more of the associated listed items. In particular, references to "the/the" object or "an" object are likewise intended to mean one of a possible plurality of such objects.

Unless specified or indicated otherwise, the terms "connected," "fixed," and the like are to be construed broadly and are, for example, capable of being fixedly connected, detachably connected, or integrally connected, electrically connected, or signally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the terms in the present disclosure may be understood by those skilled in the art according to the specific circumstances.

Further, in the description of the present disclosure, it should be understood that the terms "upper", "lower", "inner", "outer", and the like, as described in the example embodiments of the present disclosure, are described with the angles shown in the drawings, and should not be construed as limiting the example embodiments of the present disclosure. It will also be understood that in the context of an element or feature being connected to another element(s) "upper," "lower," or "inner," "outer," it can be directly connected to the other element(s) "upper," "lower," or "inner," "outer," or indirectly connected to the other element(s) "upper," "lower," or "inner," "outer" via intervening elements.

The exemplary embodiment of the present disclosure provides a battery device, as shown in fig. 1, including a battery 10 and a cold plate 20. As shown in fig. 2, the battery 10 has a first surface 101 and at least one second surface 102, the second surface 102 intersecting the first surface 101; the cold plate 20 includes a cold plate body 21 and a heat exchanging structure 22, the cold plate body 21 is provided at one side of the battery 10, and the cold plate body 21 is opposite to the first surface 101 of the battery 10, the heat exchanging structure 22 is connected to the cold plate body 21, and the heat exchanging structure 22 extends at least partially to the second surface 102 of the battery 10.

The battery device provided by the embodiment of the disclosure includes the battery 10 and the cold plate 20, among the first surface 101 and the second surface 102 intersecting on the battery 10, the first surface 101 is opposite to the cold plate main body 21, and the second surface 102 is opposite to the heat exchange structure 22, that is, the cold plate 20 can cool at least two surfaces of the battery 10, so that the cooling capacity of the cold plate 20 to the battery 10 is improved, the temperature in the battery device can be effectively reduced, and the safety of the battery device is improved.

The following will describe each part of the battery device provided in the embodiments of the present disclosure in detail:

the battery 10 has a first surface 101 and at least one second surface 102, the second surface 102 intersecting the first surface 101. The cold plate body 21 is opposite to the first surface 101, and the cold plate body 21 and the first surface 101 are connected (e.g., the cold plate body 21 and the first surface 101 are connected by a heat conductive adhesive, or the cold plate body 21 is in direct contact with the first surface 101). The heat exchanging structure 22 is connected with the cold plate body 21, and the heat exchanging structure 22 extends to the second surface 102 of the battery 10. The first surface 101 may intersect one or more of the second surfaces 102, i.e. the heat exchanging structure 22 may extend from the cold plate body 21 to the one or more second surfaces 102.

The battery 10 may include two large surfaces disposed opposite to each other and a plurality of small surfaces disposed between the two large surfaces, the large surfaces having an area larger than that of the small surfaces. The first surface 101 of the battery 10 may be one large surface of the battery 10 and the second surface 102 of the battery 10 may be a small surface of the battery 10.

For example, the battery 10 may be a rectangular or nearly rectangular structure, in which case the battery 10 may include two large surfaces and four small surfaces. The four small surfaces of the battery 10 include oppositely disposed top and bottom surfaces, and the heat exchanging structure 22 extends to the top and bottom surfaces of the battery 10, respectively.

The four small surfaces of the battery 10 include two long surfaces and two short surfaces, and the length of the long surfaces is greater than that of the short surfaces. The two long surfaces of the battery 10 are the top and bottom surfaces of the battery 10, respectively. That is, the heat exchange structure 22 contacts with both long surfaces of the battery 10, the contact area of the heat exchange structure 22 and the battery 10 can be increased, thereby improving the heat dissipation efficiency of the battery 10.

In a possible embodiment, the battery 10 is provided with a flange 12, i.e. the battery 10 may comprise a battery body 11 and the flange 12. The battery body 11 has two large surfaces disposed opposite to each other and a plurality of small surfaces between the two large surfaces. The flange 12 is provided on a small surface of the battery 10, and the flange 12 may be provided perpendicular to the small surface of the battery 10. The flange 12 may partially surround the battery body 11 or the flange 12 may surround the battery body 11.

The battery body 11 may include a housing and a battery cell, wherein a cavity is disposed in the housing, and the battery cell is disposed in the cavity in the housing. A pole 13 may be provided on the housing, the pole 13 being used for electrical connection of the battery 10. The pole 13 can be connected to a battery cell. For example, the battery core may be provided with a tab, and the tab is connected to the pole 13.

For example, a first pole (positive pole) and a second pole (negative pole) may be provided on the housing, and a first tab and a second tab may be provided on the cell, where the first tab and the first pole are connected, and the second tab and the second pole are connected.

The first and second poles are disposed at two ends of the housing along the length direction, for example, the first and second poles may be disposed on the first surface 101 of the battery body 11, and the first and second poles are disposed at two ends of the first surface 101. A recess 14 may be provided on the other large surface of the battery body 11, the recess 14 serving to avoid the post 13 of the adjacent battery 10. Or a recess 14 is provided on the first surface 101 of the battery body 11, and a post 13 is provided on the other large surface of the battery body 11.

The housing may include a first housing member and a second housing member connected to form a cavity within the housing for receiving the battery cell. In a possible embodiment, the first housing part is a flat plate, the second housing part is formed with a receiving cavity for receiving the battery cells, and the open end of the second housing part is provided with a collar for welding with the first housing part to form the flange 12.

Or, be provided with first sunken chamber on the first casing, be provided with the sunken chamber of second on the second casing, first casing and second casing are connected, and first sunken chamber and the sunken chamber of second form the cavity that holds the electric core. A first flange is arranged on the first shell, a second flange is arranged on the second shell, the first flange and the second flange are attached when the first shell is installed, and the first flange and the second flange are connected to form a flange 12.

In another possible embodiment, the battery 10 is provided with a folded portion, that is, the battery 10 may include a battery body 11 and a folded portion, the folded portion is connected to the battery body 11, and a gap is provided between the folded portion and the battery body 11. Portions of the heat exchange structure 22 may be located in the gap between the battery body 11 and the folded portion.

The folded portion may be disposed on the second surface 102 of the battery 10, that is, the surface of the battery 10 contacting the heat exchange structure 22 is provided with the folded portion. The flange portion and the second surface 102 of the battery 10 sandwich the heat exchange structure 22 so that the cold plate 20 can be tightly connected with the battery 10.

The cold plate 20 includes a cold plate body 21 and a heat exchanging structure 22, the cold plate body 21 is provided at one side of the battery 10, and the cold plate body 21 is opposite to the first surface 101 of the battery 10, the heat exchanging structure 22 is connected to the cold plate body 21, and the heat exchanging structure 22 extends at least partially to the second surface 102 of the battery 10.

Wherein a cooling medium channel is provided in the cold plate body 21 for transporting a cooling medium. The heat generated by the battery 10 during the operation of the battery 10 is transferred to the cooling medium in the cooling medium channel, and the cooling medium transfers the heat to the outside of the battery device, so that the battery 10 is cooled.

The second surface 102 of the battery 10 is provided with a flange 12 and the thermally conductive structure is located on the side of the flange 12 adjacent to the cold plate body 21. That is, the thermally conductive structure 22 terminates at the flange 12 of the battery 10 when extending to the second surface 102 of the battery 10. In practical applications, the heat conducting structure may abut the flange 12, or a gap may be provided between the heat conducting structure and the flange 12, which is not specifically limited in the embodiments of the present disclosure. By providing the heat conductive structure on the side of the flange 12 near the cold plate body 21, the space utilization in the battery device can be improved, and the installation of the cold plate 20 and the battery 10 can be facilitated.

The height of the flange 12 is smaller than or equal to the height of the heat exchange structure 22, the height of the flange 12 is the distance from one end of the flange 12 away from the second surface 102 to the second surface 102, and the height of the heat exchange structure 22 is the distance from one surface of the heat exchange structure 22 away from the second surface 102 to the second surface 102. The height of the flange 12 is smaller than or equal to the height of the heat exchange structure 22, so that the flange 12 is protected by the heat exchange structure 22, and the flange 12 is prevented from being damaged.

In a possible embodiment, the heat exchanging structure 22 is a heat dissipating fin, which is connected to the cold plate body 21 and extends at least partially to the second surface 102 of the battery 10. The heat dissipation fins may be in direct contact with the second surface 102 of the battery 10 or the heat dissipation fins may be connected to the second surface 102 of the battery 10 by a heat conductive adhesive.

The heat dissipation fins may have a rectangular or approximately rectangular plate structure, and are disposed vertically to the cold plate main body 21. The heat radiating fins may be solid metal sheets, for example, the heat radiating fins may be aluminum sheets, copper sheets, stainless steel sheets, or the like. The heat radiating fins may be formed integrally with the cold plate body 21, that is, the cold plate 20 is formed by one process, for example, the cold plate 20 is formed by casting. Or the heat radiating fins and the cold plate body 21 may be of a separate type structure, for example, the heat radiating fins may be connected to the cold plate body 21 by welding or the like.

In another possible embodiment, the heat exchange structure 22 is a liquid cooling device, which is connected to the cold plate body 21. The liquid cooling device is provided with a liquid cooling channel which is used for conveying cooling liquid. The liquid cooling channel is arranged in the cooling device, so that liquid cooling of the battery 10 is realized, and the heat exchange efficiency of the heat exchange structure 22 is improved.

The liquid cooling device can be in a cuboid or approximately cuboid structure. The liquid cooling device may be formed integrally with the cold plate body 21, that is, the cold plate 20 is formed by a single process, for example, the cold plate 20 is formed by casting. Alternatively, the liquid cooling device and the cold plate body 21 may be of a separate type, for example, the heat radiating fins may be connected to the cold plate body 21 by welding or the like.

When the heat exchange structure 22 is in contact with the top and bottom surfaces of the battery 10, respectively, as shown in fig. 3, the heat exchange structure 22 may include: a first heat exchanging part 221 and a second heat exchanging part 222, the first heat exchanging part 221 being connected to the top of the cold plate body 21 and extending to the top surface of the battery 10; the second heat exchanging part 222 is connected to the bottom of the cold plate body 21 and extends to the bottom surface of the battery 10.

The first heat exchanging part 221 extends to the top surface of the battery 10, and the first heat exchanging part 221 is in direct contact with the top surface of the battery 10 or the first heat exchanging part 221 is connected with the bottom surface of the battery 10 through heat conductive glue. The second heat exchanging part 222 extends to the bottom surface of the battery 10, and the second heat exchanging part 222 is in direct contact with the bottom surface of the battery 10 or the second heat exchanging part 222 and the bottom surface of the battery 10 are connected by heat conductive adhesive.

The first heat exchanging part 221 may be a first heat radiating fin, and the second heat exchanging part 222 may be a second heat radiating fin. The first heat dissipation fin is connected to the top surface of the cold plate body 21 and extends from the cold plate body 21 to the top surface of the battery 10. One end of the first heat radiating fin, which is remote from the cold plate main body 21, abuts on the flange 12 of the battery 10. The second heat dissipation fins are connected to the bottom surface of the cold plate body 21, extend from the cold plate body 21 to the bottom surface of the battery 10, and have one ends far away from the cold plate body 21 abutting against the flange 12 of the battery 10.

Alternatively, the first heat exchanging portion 221 may be a first cooling device, and the second heat exchanging portion 222 may be a second cooling device. At least one cooling channel is arranged in the first cooling device, and at least one cooling channel is arranged in the second cooling device. The first cooling device sheet is connected to the top surface of the cold plate body 21 and extends from the cold plate body 21 to the top surface of the battery 10. The end of the first cooling device remote from the cold plate body 21 abuts against the flange 12 of the battery 10. The second cooling device is connected to the bottom surface of the cold plate body 21 and extends from the cold plate body 21 to the bottom surface of the battery 10, and one end of the second cooling device, which is remote from the cold plate body 21, abuts on the flange 12 of the battery 10.

The height of the flange 12 is equal to or less than the height of the first heat exchanging portion 221, and the height of the first heat exchanging portion 221 is the distance from the surface of the first heat exchanging portion 221 away from the second surface 102 to the second surface 102. The height of the flange 12 is less than or equal to the height of the second heat exchanging portion 222, and the height of the second heat exchanging portion 222 is the distance from the surface of the second heat exchanging portion 222 away from the second surface 102 to the second surface 102.

In a possible embodiment, the first heat exchanging part 221 and the second heat exchanging part 222 are provided at the same side of the cold plate body 21 to form the C-shaped cold plate 20. The first heat exchanging part 221, the second heat exchanging part 222 and the cold plate body 21 are connected to the cold plate 20 to form a receiving space in which the battery 10 is disposed. The first heat exchanging part 221, the second heat exchanging part 222, and the cold plate body 21 are respectively in contact with one surface of the battery 10, increasing the heat exchanging area of the battery 10.

The battery device may include a plurality of batteries 10 arranged in sequence, and a C-shaped cold plate 20 is sleeved on the batteries 10. In practical applications, the cold plate 20 may be provided on each of the cells 10, or one cold plate 20 may be provided every several cells 10 in the arrangement direction of the cells 10.

In another possible embodiment, as shown in fig. 4, the first heat exchanging part 221 includes a first sub heat exchanging part 201 and a second sub heat exchanging part 202, the first sub heat exchanging part 201 and the second sub heat exchanging part 202 are respectively disposed at both sides of the cold plate main body 21, the second heat exchanging part 222 includes a third sub heat exchanging part 203 and a fourth sub heat exchanging part 204, and the third sub heat exchanging part 203 and the fourth sub heat exchanging part 204 are respectively disposed at both sides of the cold plate main body 21 to form the i-shaped cold plate 20.

The first heat exchanging part 221, the second heat exchanging part 222, and the cold plate body 21 form receiving spaces for receiving the battery 10 at both sides of the cold plate body 21, respectively. The first sub heat exchange portion 201, the cold plate main body 21, and the third sub heat exchange portion 203 form a first accommodating space, and the second sub heat exchange portion 202, the cold plate main body 21, and the fourth sub heat exchange portion 204 form a second accommodating space.

The first battery 110 and the second battery 120 are respectively arranged at two sides of the cold plate main body 21, the first sub heat exchange part 201 and the third sub heat exchange part 203 are connected with the first battery 110, and the second sub heat exchange part 202 and the fourth sub heat exchange part 204 are connected with the second battery 120.

Wherein the first battery 110 and the second battery 120 may be disposed face-to-face. I.e., the side of the first cell 110 remote from the flange 12 is opposite the side of the second cell 120 remote from the flange 12. The first battery 110 is disposed in the first accommodating space, and the second battery 120 is disposed in the second accommodating space. The first battery 110, the cold plate 20, and the second battery 120 form a battery pack, and a plurality of battery packs may be included in the battery device, the plurality of battery packs being sequentially arranged.

The battery 10 is provided with a folded edge part which is used for being matched with the battery body 11 to limit the cold plate 20. As an example, as shown in fig. 5, the first folded edge 15 is disposed on the top surface of the battery 10, and a gap is formed between the first folded edge 15 and the top surface of the battery 10, and the first heat exchanging part 221 protrudes into the gap between the first folded edge 15 and the top surface of the battery 10; the second folded edge 16 is provided on the bottom surface of the battery 10, and a gap is provided between the second folded edge 16 and the bottom surface of the battery 10, and the second heat exchanging portion 222 extends into the gap between the second folded edge 16 and the bottom surface of the battery 10.

When the first heat exchanging part 221 is located between the first folded edge 15 and the top surface of the battery 10, the first folded edge 15 and the battery 10 apply a preset pressure to the first heat exchanging part 221, and when the second heat exchanging part 222 is located between the second folded edge 16 and the bottom surface of the battery 10, the second folded edge 16 and the battery 10 apply a preset pressure to the second heat exchanging part 222, so that the cold plate 20 is stably connected to the battery 10, and the influence on the cooling effect due to the relative displacement of the cold plate 20 and the battery 10 is avoided.

The first edge fold 15 may include a first limiting portion and a first connecting portion, where the first connecting portion is connected with the top surface of the battery 10 main body, and the first limiting portion and the first connecting portion are connected with one end of the battery 10 main body far away from, and the first limiting portion and the top surface of the battery 10 are disposed in parallel. When the cold plate 20 and the battery 10 are connected, the first heat exchanging part 221 is clamped by the first limiting part and the battery body 11.

The second flange 16 includes a second limiting portion and a second connecting portion, the second connecting portion is connected to the bottom surface of the battery body 11, the second limiting portion is connected to one end of the second connecting portion away from the battery body 11, and the second limiting portion and the bottom surface of the battery body 11 are parallel. When the cold plate 20 and the battery 10 are connected, the second heat exchanging portion 222 is clamped by the second limiting portion and the battery body 11.

The flange portion and the battery body 11 may be of an integral structure in the embodiment of the present disclosure, for example, the flange portion may be a flange formed on the case member by a process such as stamping when the case member is molded. Of course, in practical application, the folded portion and the battery body 11 may be formed separately, which is not limited in the embodiment of the disclosure.

It should be noted that the above embodiment exemplarily shows a structure in which the heat exchanging structure 22 is in contact with the top and bottom surfaces of the battery 10. In the disclosed embodiment, the heat exchange structure 22 may also be in a ring-like structure, and the heat exchange structure 22 surrounds the battery 10.

The pole 13 of the battery 10 is provided on one large surface of the battery 10 in the embodiment of the present disclosure, and the recess 14 is provided on the other large surface of the battery 10. When a plurality of cells 10 are stacked on a large surface, the posts 13 of the cells 10 are positioned in the recessed portions 14 of the adjacent cells 10.

In a possible implementation manner of the embodiment of the present disclosure, the first surface 101 of the battery 10 facing the cold plate main body 21 is provided with a pole 13, and the orthographic projection area of the pole 13 on the cold plate main body 21 is provided with a pole avoiding portion. When the battery 10 and the cold plate 20 are connected, the pole 13 of the battery 10 is positioned in the pole relief portion of the cold plate 20, avoiding interference between the pole 13 and the cold plate body 21, so that the cold plate body 21 and the first surface 101 of the battery 10 are in close contact.

The battery 10 may have the poles 13 provided at both ends thereof, and the cold plate body 21 may have pole avoiding portions provided at both ends thereof. The post relief may be a recess or notch in the cold plate body 21. For example, the pole relief portion may be a notch provided at an end of the cold plate body 21, and the pole relief portion penetrates the cold plate body 21 in the direction in which the batteries 10 are arranged.

In another possible implementation of the disclosed embodiment, the first surface 101 of the battery 10 facing the cold plate body 21 is provided with a recess 14, and the cold plate 20 is not provided at the recess 14 of the battery 10.

In this case, the concave portions 14 may be provided at both ends of the battery 10, respectively, and at this time, both ends of the cold plate body 21 are aligned with the inner edges of the corresponding concave portions 14, respectively. The length of the cold plate body 21 is smaller than the length of the battery 10, for example, the length of the cold plate body 21 and the length of the battery 10 differ by the length of two recesses.

Or when the recess 14 is provided on the battery 10, in order to further enhance the cooling capacity of the cold plate 20, a projection may be provided on the recess projection area on the cold plate body 21, the projection extending into the recess 14 of the battery 10 and being at least partially in contact with the inner wall of the recess 14, the recess projection area being a forward projection area of the recess 14 on the cold plate body 21. For example, the protrusions may be contoured recesses 14, i.e., the shape of the protrusions and recesses match such that the protrusions closely conform to the recesses 14.

When the cold plate 20 is a C-shaped cold plate 20, the pole 13 may be provided on a side of the battery 10 facing the cold plate body 21 or the pole 13 may be provided on a side of the battery 10 facing away from the cold plate body 21. When the cold plate 20 is an i-shaped cold plate 20, the pole 13 is provided on a side of the battery 10 remote from the cold plate body 21.

The battery device in the embodiments of the present disclosure may be a battery pack, a battery module, or a battery 10 pack, or the like. The battery pack refers to a pack structure formed by connecting the battery 10 and the cold plate 20. The battery module may include a plurality of batteries 10, and cold plates 20 are respectively sleeved on the plurality of batteries 10. The battery 10 pack may include a case and a plurality of batteries 10, with a cold plate 20 disposed between the plurality of batteries 10, the plurality of batteries 10 and the cold plate 20 being disposed in the case.

When the battery device is a battery module, the battery module may further include an end plate and a side plate, the plurality of batteries 10 are stacked in sequence to form a battery pack, the end plates are respectively arranged at two ends of the battery pack along the stacking direction, the side plates are respectively arranged at two sides of the battery pack along the stacking direction, and a cold plate 20 is arranged between the adjacent batteries 10.

When the battery device is a battery 10 pack, the battery 10 pack may be a plurality of batteries 10 and the cold plate 20 directly mounted in the case to form the battery 10 pack, or the plurality of batteries 10 and the cold plate 20 are integrated into a battery module first and then enter the case in the form of a battery pack.

The battery device provided by the embodiment of the disclosure includes the battery 10 and the cold plate 20, among the first surface 101 and the second surface 102 intersecting on the battery 10, the first surface 101 is opposite to the cold plate main body 21, and the second surface 102 is opposite to the heat exchange structure 22, that is, the cold plate 20 can cool at least two surfaces of the battery 10, so that the cooling capacity of the cold plate 20 to the battery 10 is improved, the temperature in the battery device can be effectively reduced, and the safety of the battery device is improved.

The 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, and the battery pack is installed on the electric vehicle and provides energy for the electric vehicle.

In practice, the battery pack may be mounted to the frame of an electric vehicle. The battery pack can be fixedly connected with the frame. Or the battery pack can be a modularized 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 adaptations, 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 (15)

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

a battery having a first surface and at least one second surface, the second surface intersecting the first surface;

the cold plate comprises a cold plate main body and a heat exchange structure, wherein the cold plate main body is arranged on one side of the battery, the cold plate main body is opposite to the first surface of the battery, the heat exchange structure is connected with the cold plate main body, and the heat exchange structure at least partially extends to the second surface of the battery.

2. The battery device of claim 1, wherein the battery includes two oppositely disposed large surfaces and a small surface disposed between the two large surfaces, the large surface having an area greater than an area of the small surface, the first surface being the large surface and the second surface being the small surface.

3. The battery device of claim 2, wherein the plurality of small surfaces of the battery include oppositely disposed top and bottom surfaces, the top and bottom surfaces of the battery being the second surface, the heat exchanging structure extending to the top and bottom surfaces of the battery, respectively.

4. The battery device of claim 3, wherein the heat exchange structure comprises:

the first heat exchange part is connected to the top of the cold plate main body and extends to the top surface of the battery;

and the second heat exchange part is connected to the bottom of the cold plate main body and extends to the bottom surface of the battery.

5. The battery device according to claim 4, wherein the first heat exchanging portion and the second heat exchanging portion are heat radiating fins.

6. The battery device according to claim 4, wherein the first heat exchanging portion and the second heat exchanging portion are liquid cooling devices.

7. The battery device according to claim 4, wherein the first heat exchanging portion and the second heat exchanging portion are provided on the same side of the cold plate body to form a C-shaped cold plate.

8. The battery device according to claim 4, wherein the first heat exchange portion includes a first sub heat exchange portion and a second sub heat exchange portion, the first sub heat exchange portion and the second sub heat exchange portion are respectively provided at both sides of the cold plate main body, the second heat exchange portion includes a third sub heat exchange portion and a fourth sub heat exchange portion, and the third sub heat exchange portion and the fourth sub heat exchange portion are respectively provided at both sides of the cold plate main body to form an i-shaped cold plate.

9. The battery device according to claim 8, wherein a first battery and a second battery are provided on both sides of the cold plate main body, respectively, the first sub heat exchange portion and the third sub heat exchange portion are connected to the first battery, and the second sub heat exchange portion and the fourth sub heat exchange portion are connected to the second battery.

10. The battery device according to claim 4, wherein a first flange is provided on a top surface of the battery with a gap therebetween, and the first heat exchanging portion extends into the gap between the first flange and the top surface of the battery;

the bottom surface of the battery is provided with a second folded edge, a gap is reserved between the second folded edge and the bottom surface of the battery, and the second heat exchange part stretches into the gap between the second folded edge and the bottom surface of the battery.

11. The battery device of claim 1, wherein a flange is provided on the second face of the battery, and the heat exchanging structure is located on a side of the flange adjacent to the cold plate body.

12. The battery device of claim 11, wherein the height of the flange is equal to or less than the height of the heat exchange structure, the height of the flange being the distance from the end of the flange remote from the second surface to the second surface, the height of the heat exchange structure being the distance from the side of the heat exchange structure remote from the second surface to the second surface.

13. The battery device of claim 1, wherein a pole is provided on a first surface of the battery facing the cold plate body, a pole relief portion is provided on the cold plate body, and the pole relief portion is provided on a forward projection area of the pole in the cold plate body.

14. The battery device of claim 1, wherein a recess is provided in a first surface of the battery facing the cold plate body, and wherein the cold plate is not provided in the recess of the battery.

15. The battery device of claim 1, wherein a recess is provided on a first surface of the battery facing the cold plate body, a recess projection area on the cold plate body is provided with a protrusion, the protrusion extends into the recess of the battery, and the protrusion is at least partially in contact with an inner wall of the recess, and the recess projection area is an orthographic projection area of the recess on the cold plate body.

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