CN218827393U

CN218827393U - Cooling plate, battery pack and vehicle

Info

Publication number: CN218827393U
Application number: CN202222638780.5U
Authority: CN
Inventors: 朱燕; 廖正远; 崔玮; 刘旭锋; 孙泽楠
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2022-09-30
Filing date: 2022-09-30
Publication date: 2023-04-07
Anticipated expiration: 2032-09-30

Abstract

The utility model discloses a cooling plate, battery package and vehicle, the cooling plate includes: the middle part comprises two heat exchange parts arranged at intervals in a first direction; the heat exchange medium heat exchanger comprises a first end part and a second end part, wherein the first end part and the second end part are distributed at two ends of a middle part in a second direction, the first end part is respectively connected with the two heat exchange parts, the second end part is respectively connected with the two heat exchange parts, the middle part, the first end part and the second end part limit a flow space of a heat exchange medium, the rigidity of the middle part is respectively smaller than that of the first end part and that of the second end part so as to be suitable for elastic deformation when an external force is applied to the middle part, and the first direction and the second direction are vertically arranged. Therefore, the extrusion degree of the expanded single battery can be reduced, and the service life and the safety of the single battery are improved.

Description

Cooling plate, battery pack and vehicle

Technical Field

The utility model belongs to the technical field of the battery and specifically relates to a cooling plate, battery package and vehicle are related to.

Background

In the related art, a cold plate generally has two large surfaces which are symmetrically arranged, the two large surfaces are respectively attached with a battery sequence, one end of the cold plate is provided with a water inlet, the other end of the cold plate is provided with a water outlet, and a flow passage for communicating the water inlet and the water outlet is arranged in the cold plate; the two battery sequences are respectively arranged on the symmetrical large surfaces of the cold plate, so that the large surfaces of the battery sequences are attached to the large surface of the cold plate, and the heat dissipation of the battery sequences is better. However, the cold plate is generally constructed in a rigid arrangement, and when the battery expands, the cold plate may press the expanded battery, resulting in a reduction in battery life, and there is room for improvement.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a cooling plate can slow down the extrusion degree to the expanded battery cell, has improved battery cell's life, and has improved battery cell's security.

According to the utility model discloses the cooling plate, the cooling plate includes: the heat exchanger comprises a middle part and a plurality of heat exchange parts, wherein the middle part comprises two heat exchange parts which are arranged at intervals in a first direction; the heat exchanger comprises a first end part and a second end part, wherein the first end part and the second end part are distributed at two ends of the middle part in a second direction, the first end part is respectively connected with the two heat exchange parts, the second end part is respectively connected with the two heat exchange parts, the middle part, the first end part and the second end part define a flow space of a heat exchange medium, the rigidity of the middle part is respectively smaller than that of the first end part and that of the second end part so as to be suitable for elastic deformation when an external force is applied to the middle part, and the first direction and the second direction are vertically arranged.

According to the utility model discloses the cooling plate, rigidity through the mid portion that sets up the cooling plate is less, and when battery cell took place the inflation, mid portion can be towards the direction elastic deformation who keeps away from battery cell to dodge battery cell, thereby can slow down the cooling plate to battery cell's extrusion degree, improved battery cell's life, and improved battery cell's security.

According to some embodiments of the cooling plate of the present invention, in the second direction, the first end portion and the second end portion have the same height.

According to some embodiments of the present invention, the first end portion is provided with two first connection portions which are inserted into the corresponding heat exchanging portion so that the first end portion and the middle portion are fixedly connected.

According to the utility model discloses some embodiments's cooling plate, first connecting portion are equipped with first depressed part, some of heat transfer part is filled in corresponding first depressed part.

According to the utility model discloses some embodiments's cooling plate, the second end is equipped with two second connecting portions, the second connecting portion insert corresponding in the heat transfer portion so that the second end with middle part fixed connection.

According to the utility model discloses the cooling plate of some embodiments, the second connecting portion are equipped with the second depressed part, some of heat transfer part is filled in corresponding the second depressed part.

According to the utility model discloses some embodiments's cooling plate still includes first isolation portion, first isolation portion follows the first direction extends, the both ends of first isolation portion respectively with the mid portion and/or the first end links to each other in order to separate first space and second space.

According to the utility model discloses some embodiments's cooling plate, first space with the second space is through being located the first communication channel intercommunication of the tip of first isolation.

According to the utility model discloses some embodiments's cooling plate still includes second isolation portion, the second isolation portion is followed first direction extends, the both ends of second isolation portion respectively with the mid portion and/or the second tip links to each other in order to separate second space and third space.

According to some embodiments of the present invention, the second space and the third space are communicated through a second communicating passage located at an end of the second partition.

According to some embodiments of the invention, the first end portion and the second end portion are respectively metal pieces.

The utility model also provides a battery package.

According to the utility model discloses battery package, include: a single battery; a cooling plate according to any of the above embodiments, wherein the middle portion, the first end portion and the second end portion are respectively in heat exchange with the single battery, and the middle portion has a rigidity smaller than a rigidity of the first end portion and a rigidity of the second end portion so as to be adapted to be elastically deformed when the single battery expands.

According to the utility model discloses battery package, rigidity through the mid portion that sets up the cooling plate is less, and when battery cell took place the inflation, the mid portion can be towards the direction elastic deformation who keeps away from battery cell to dodge battery cell, thereby can slow down the cooling plate to battery cell's extrusion degree, improved battery cell's life, and improved battery cell's security, improved battery package's security.

According to the utility model discloses the battery package of some embodiments, battery cell has a plurality of lateral walls, a plurality of lateral walls include the heat transfer lateral wall of two relative settings, the area of heat transfer lateral wall is greater than the area of all the other lateral walls of battery cell, the cooling plate with the heat transfer lateral wall heat exchange.

The utility model also provides a vehicle.

According to the utility model discloses the vehicle of embodiment includes according to above-mentioned any embodiment battery package.

According to the utility model discloses vehicle, rigidity through the mid portion that sets up the cooling plate is less, and when battery cell took place the inflation, mid portion can be towards the direction elastic deformation who keeps away from battery cell to dodge battery cell, thereby can slow down the cooling plate and to battery cell's extrusion degree, improved battery cell's life, and improved battery cell's security, improved the security of battery package, thereby promoted the wholeness ability of vehicle.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic view of a cooling plate according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of a cooling plate according to an embodiment of the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

FIG. 4 is an enlarged view of a portion of FIG. 2 at B;

FIG. 5 is a schematic view of a cooling plate according to another embodiment of the present invention;

fig. 6 is a cross-sectional view of a cooling plate according to another embodiment of the present invention.

Reference numerals:

the cooling plate (100) is cooled down,

the intermediate portion 1, the heat exchanging portion 11, the projections 12,

a first end portion 2, a first connection plate 21, a first connection portion 22, a first recess portion 221, a first isolation portion 23,

a second end portion 3, a second connecting plate 31, a second connecting portion 32, a second recess 321, a second spacer 33,

a flow space 4, a first space 41, a second space 42, a third space 43.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.

Next, with reference to the drawings, a cooling plate 100 according to an embodiment of the present invention is described.

As shown in fig. 1 to 6, a cooling plate 100 according to an embodiment of the present invention includes: the heat exchanger comprises a middle part 1, a first end part 2 and a second end part 3, wherein the middle part 1 comprises two heat exchange parts 11 arranged at intervals in a first direction; the first end part 2 and the second end part 3 are distributed at two ends of the middle part 1 in the second direction, the first end part 2 is respectively connected with the two heat exchange parts 11, the second end part 3 is respectively connected with the two heat exchange parts 11, the middle part 1, the first end part 2 and the second end part 3 define a flow space 4 for heat exchange media, the middle part 1, the first end part 2 and the second end part 3 are respectively suitable for heat exchange with the single battery, the rigidity of the middle part 1 is respectively smaller than the rigidity of the first end part 2 and the rigidity of the second end part 3 so as to be suitable for elastic deformation when being subjected to external force, and the first direction and the second direction are vertically arranged.

Therefore, the extrusion degree of the cooling plate 100 to the expanded single battery can be reduced, the service life of the single battery is prolonged, and the safety of the single battery is improved.

For example, referring to fig. 1 to 2, the cooling plate 100 includes a first end portion 2, a middle portion 1, and a second end portion 3, and the first end portion 2, the middle portion 1, and the second end portion 3 are sequentially arranged in a second direction (an up-down direction as shown in fig. 2) to dispose the first end portion 2 and the second end portion 3 at both ends of the middle portion 1, respectively. The cross sections of the first end portion 2 and the second end portion 3 may each be configured in a concave shape that is open toward the middle portion 1, both sides of the first end portion 2 in the first direction (left-right direction as shown in fig. 2) include first connection plates 21, respectively, and both sides of the second end portion 3 in the first direction (left-right direction as shown in fig. 2) are provided with second connection plates 31, respectively, the middle portion 1 includes two heat exchange portions 11, and both the two heat exchange portions 11 extend in the up-down direction and are arranged at intervals in the left-right direction.

The upper end of the heat exchange section 11 on the left side is connected to the first connection plate 21 on the left side, the lower end of the heat exchange section 11 on the left side is connected to the second connection plate 31 on the left side, the upper end of the heat exchange section 11 on the right side is connected to the first connection plate 21 on the right side, and the lower end of the heat exchange section 11 on the right side is connected to the second connection plate 31 on the right side. So that the first end part 2 and the second end part 3 can fix the middle part 1 from both ends, and so that the middle part 1, the first end part 2 and the second end part 3 can jointly define a flow space 4 with both open ends, and the flow space 4 is used for circulating a heat exchange medium, which can be distilled water or the like. The side wall of the cooling plate 100 along the first direction (the left-right direction shown in fig. 2) may be arranged to be in heat conduction connection with the single batteries of the battery pack, so that the middle portion 1, the first end portion 2, and the second end portion 3 may respectively perform heat exchange with the single batteries to achieve effective cooling of the single batteries.

Wherein the stiffness of the middle portion 1 may be arranged to be smaller than the stiffness of the first end portion 2 and the stiffness of the second end portion 3, respectively, such that the middle portion 1 may be elastically deformed when subjected to an external force. Like this, when the battery cell produced the inflation, middle part 1 can be towards the direction of keeping away from the battery cell and take place elastic deformation to dodge the battery cell, thereby can slow down cooling plate 100 to the extrusion degree of battery cell, improved battery cell's life.

Further, the middle part 1 can be made of plastic, rubber or silica gel and the like, when the single battery is on fire, the middle part 1 can be melted when the single battery reaches a certain temperature, so that a heat exchange medium (such as distilled water) in the flowing space 4 can flow to the single battery, flame on the single battery can be extinguished, and the safety of the battery pack is improved.

According to the utility model discloses cooling plate 100, rigidity through setting up mid portion 1 is less, and when battery cell took place the inflation, mid portion 1 can be towards the direction elastic deformation who keeps away from battery cell to dodge battery cell, thereby can slow down cooling plate 100 to battery cell's extrusion degree, improved battery cell's life, and improved battery cell's security.

In some embodiments of the present invention, referring to fig. 2, the first end portion 2 and the second end portion 3 are the same height in the second direction. It can be understood that, by setting the first end portion 2 and the second end portion 3 to have the same height dimension, the first end portion 2 and the second end portion 3 can both effectively support the middle portion 1, so as to avoid the middle portion 1 from being deformed at one side when the single battery expands and leading to the cooling plate 100 to separate from the single battery, ensure that the cooling plate 100 can be in heat conduction connection with the side wall of the expanded single battery, and ensure that the cooling plate 100 can reliably cool the single battery.

It should be noted that the side wall of the cooling plate 100 may directly contact the side wall of the single battery, so as to reduce the processing difficulty of the battery pack and reduce the cost; or, heat conducting materials such as heat conducting glue can be coated between the side wall of the cooling plate 100 and the side wall of the single battery, so that the heat conducting performance between the cooling plate 100 and the single battery is improved, the temperature of the single battery is favorably reduced, and the reliability of the battery pack is improved.

In some embodiments of the present invention, the first end portion 2 is provided with two first connecting portions 22, and the first connecting portions 22 are inserted into the corresponding heat exchanging portions 11 so that the first end portion 2 and the middle portion 1 are fixedly connected. For example, as shown in fig. 2 to 3, first connection portions 22 may be respectively provided at lower end surfaces of the two first connection plates 21, the first connection portions 22 are configured in a downwardly convex block shape, and a downwardly concave groove may be provided at an upper end of the corresponding heat exchange portion 11, the groove being disposed opposite to the first connection portions 22. In this way, the first connecting portion 22 can be inserted downwards into the groove of the corresponding heat exchanging portion 11, and the upper end surface of the corresponding heat exchanging portion 11 is abutted against the lower end surface of the first connecting plate 21, so as to fixedly connect the first end portion 2 with the middle portion 1.

Through the arrangement, the connection structure of the first end part 2 and the middle part 1 is simple, the assembly difficulty is reduced, the sealing performance of the flowing space 4 is improved, and the reliability of the cooling plate 100 is improved.

In some embodiments of the present invention, the first connecting portion 22 is provided with a first recess 221, and a portion of the heat exchanging portion 11 is filled in the corresponding first recess 221. For example, referring to fig. 3, a plurality of first concave portions 221 may be respectively disposed on left and right side surfaces of the first connection portion 22, the plurality of first concave portions 221 disposed on the same side surface may be spaced apart in an up-down direction, and a plurality of protruding portions 12 may be respectively disposed at two side walls of the groove of the corresponding heat exchange portion 11, and the protruding portions 12 are used for filling the first concave portions 221 and for vertically limiting the first connection portion 22. This improves the stability of connection between the middle portion 1 and the first end portion 2, and improves the reliability of the cooling plate 100.

In some embodiments of the present invention, the second end portion 3 is provided with two second connecting portions 32, and the second connecting portions 32 are inserted into the corresponding heat exchanging portions 11 to fixedly connect the second end portion 3 and the middle portion 1. For example, as shown in fig. 2 and 4, second connection parts 32 may be respectively provided at upper end surfaces of the two second connection plates 31, the second connection parts 32 are configured in a block shape protruding upward, and an upward recessed groove may be provided at a lower end of the corresponding heat exchange portion 11, the groove being disposed opposite to the second connection parts 32. In this way, the second connecting portion 32 can be inserted upwards into the groove of the corresponding heat exchanging portion 11, and the lower end surface of the corresponding heat exchanging portion 11 is abutted against the upper end surface of the second connecting plate 31, so as to fixedly connect the second end portion 3 with the middle portion 1.

Through the arrangement, the connection structure of the second end part 3 and the middle part 1 is simple, the assembly difficulty is reduced, the sealing performance of the flowing space 4 is improved, and the reliability of the cooling plate 100 is improved.

In some embodiments of the present invention, the second connecting portion 32 is provided with a second recess 321, and a part of the heat exchanging portion 11 is filled in the corresponding second recess 321. For example, referring to fig. 4, a plurality of second recesses 321 may be respectively disposed on both left and right side surfaces of the second connection portion 32, the plurality of second recesses 321 disposed on the same side surface may be spaced apart in an up-down direction, and a plurality of protrusions 12 may be respectively disposed at both side walls of the groove of the corresponding heat exchange portion 11, and the protrusions 12 are used for being filled in the second recesses 321, so that the protrusions 12 may vertically limit the second connection portion 32. This improves the stability of the connection between the middle portion 1 and the second end portion 3, and improves the reliability of the cooling plate 100.

In some embodiments of the present invention, as shown in fig. 6, the cooling plate 100 of the embodiments of the present invention further includes a first isolation portion 23, the first isolation portion 23 extends along the first direction, and both ends of the first isolation portion 23 are respectively connected to the middle portion 1 and/or the first end portion 2 to separate the first space 41 and the second space 42.

For example, as shown in fig. 5 to 6, a first partition 23 may be provided in the flow space 4 of the cooling plate 100, and the first partition 23 may be configured in a plate shape extending in a first direction (i.e., in the left-right direction shown in fig. 6). Wherein, the first isolation portion 23 may be provided to extend in parallel in the left-right direction, so that both ends of the first isolation portion 23 are respectively connected with the inner walls of the two first connection plates 21 of the first end portion 2; alternatively, the first partition 23 may be provided to extend obliquely in the left-right direction (for example, the left side of the first partition 23 may be provided to be inclined upward or downward), so that one end of the first partition 23 may be connected to the inner wall of the middle portion 1, and the other end of the first partition 23 may be connected to the inner wall of the first connection plate 21; still alternatively, the first separating portion 23 may be provided to extend in parallel in the left-right direction such that both ends of the first separating portion 23 are connected to the inner walls of the two heat exchanging parts 11, respectively. In this way, the first space 41 and the second space 42 can be partitioned in the flow space 4 by the first partition 23.

It can be understood that, through dividing flow space 4 into first space 41 and second space 42 in vertical for heat transfer medium can flow into respectively in first space 41 and the second space 42 in order to cool off the different regions of battery cell, under the not enough condition of heat transfer medium, can effectively avoid the unilateral of battery cell to cool off not enough and the power that leads to is restricted, does benefit to the reliability that improves battery cell.

It should be noted that, when the two ends of the first separating portion 23 are respectively connected to the inner walls of the two first connecting plates 21 of the first end portion 2, the first separating portion 23 can define a first space 41 in the first end portion 2, and at this time, if the middle portion 1 is deformed, the normal flow of the heat exchange medium in the first space 41 is not affected. This is advantageous in improving the reliability of the cooling plate 100. In some embodiments of the present invention, the first space 41 and the second space 42 are communicated through a first communication passage located at an end of the first partition 23. For example, a first communication channel may be provided at one end of the first isolation portion 23 along the length direction, the first communication channel is used to communicate the first space 41 with the second space 42, at this time, a heat exchange medium may be introduced toward an end of the first space 41 (or the second space 42) away from the first communication channel, the heat exchange medium may flow along the first space 41 to flow into the first communication channel, the heat exchange medium may flow along the first communication channel to flow into the second space 42, and flow along the second space 42 to flow out of the cooling plate 100, so as to realize a circulating flow of the heat exchange medium. Therefore, the flow requirement of the heat exchange medium in the cooling plate 100 can be reduced, and the difficulty in pipeline arrangement is favorably reduced.

Of course, the present application is not limited to this, and the present application may also realize separate circulation of the heat exchange medium in the first space 41 and the second space 42 by introducing the heat exchange medium into the first space 41 and the second space 42, respectively. Therefore, the cooling requirement of the single battery under high power can be met.

Further, a plurality of partition plates may be further provided in the first space 41 and/or the second space 42, the plurality of partition plates being spaced apart and staggered in the flow direction of the heat exchange medium to define the flow path of the heat exchange medium as an S-like structure. Thereby, the flow stroke of the heat exchange medium in the cooling plate 100 can be increased to sufficiently cool the unit cells.

In some embodiments of the present invention, as shown in fig. 6, the cooling plate 100 of the present invention further includes a second isolation portion 33, the second isolation portion 33 extends along the first direction, and both ends of the second isolation portion 33 are respectively connected to the middle portion 1 and/or the second end portion 3 to separate the second space 42 and the third space 43.

For example, as shown in fig. 5 to 6, a second partition 33 may be provided in the flow space 4 of the cooling plate 100, and the second partition 33 may be configured in a plate shape extending in the first direction (i.e., the left-right direction shown in fig. 6). Wherein, the second isolation portion 33 may be arranged to extend in parallel in the left-right direction, so that both ends of the second isolation portion 33 are respectively connected with the inner walls of the two second connecting plates 31 of the second end portion 3; alternatively, the second isolation portion 33 may be provided to extend obliquely in the left-right direction (for example, the left side of the second isolation portion 33 may be provided to be inclined upward or downward), so that one end of the second isolation portion 33 may be connected to the inner wall of the middle portion 1, and so that the other end of the second isolation portion 33 may be connected to the inner wall of the second connection plate 31; still alternatively, the second isolation part 33 may be provided to extend in parallel in the left-right direction such that both ends of the second isolation part 33 are connected to the inner walls of the two heat exchange parts 11, respectively. In this way, the second space 42 and the third space 43 can be partitioned in the flow space 4 by the second partition 33.

It can be understood that, through dividing flow space 4 into second space 42 and third space 43 in vertical for heat transfer medium can flow into respectively in second space 42 and the third space 43 with the different regions to the battery cell cool off, under the not enough condition of heat transfer medium, can effectively avoid the unilateral of battery cell to cool off not enough and the power that leads to is restricted, does benefit to the reliability that improves battery cell.

It should be noted that when two ends of the second separating portion 33 are respectively connected with the inner walls of the two second connecting plates 31 of the second end portion 3, the second separating portion 33 can define a second space 42 in the second end portion 3, and at this time, if the middle portion 1 is deformed, the normal flow of the heat exchange medium in the second space 42 is not affected. This is advantageous in improving the reliability of the cooling plate 100.

In some embodiments of the present invention, the second space 42 and the third space 43 are communicated through a second communication passage located at an end of the second isolation portion 33. For example, a second communication passage for communicating the second space 42 with the third space 43 may be provided at one end of the second partition 33 in the longitudinal direction. At this time, a heat exchange medium may be introduced toward an end of the second space 42 (or the third space 43) away from the second communication channel, the heat exchange medium may flow along the second space 42 to flow into the second communication channel, and the heat exchange medium may flow along the second communication channel into the third space 43 and flow along the third space 43 to flow out of the cooling plate 100, so as to realize a circulating flow of the heat exchange medium. Therefore, the flow requirement of the heat exchange medium in the cooling plate 100 can be reduced, and the difficulty in pipeline arrangement is favorably reduced.

Of course, the present application is not limited to this, and the present application may also realize separate circulation of the heat exchange medium in the second space 42 and the third space 43 by respectively introducing the heat exchange medium into the second space 42 and the third space 43. Therefore, the cooling requirement of the single battery under high power can be met.

Further, a plurality of partition plates may be further provided in the second space 42 and/or the third space 43, the plurality of partition plates being spaced apart and staggered in the flow direction of the heat exchange medium to define the flow path of the heat exchange medium as an S-like structure. Thereby, the flow stroke of the heat exchange medium within the cooling plate 100 can be increased to sufficiently cool the unit cells.

Specifically, as shown in fig. 6, a first partition 23 may be provided in the first end portion 2, both ends of the first partition 23 being connected to inner walls of the two first connection plates 21 of the first end portion 2, respectively, and a second partition 33 may be provided in the second end portion 3, both ends of the second partition 33 being connected to inner walls of the two second connection plates 31 of the second end portion 3, respectively, to divide the flow space 4 into a first space 41, a second space 42, and a third space 43. Meanwhile, a first communicating channel for communicating one ends of the first space 41 and the second space 42 and a second communicating channel for communicating the other ends of the third space 43 and the second space 42 may be respectively provided at both ends of the cooling plate 100 in the length direction. At this time, the heat exchange medium may flow into the first communication channel along the first space 41 by being introduced toward an end of the first space 41 away from the first communication channel to flow into the second space 42 from the first communication channel, and the heat exchange medium may flow along the second space 42 to flow into the third space 43 through the second communication channel to flow out of the cooling plate 100 from the third space 43 to realize a circulation flow of the heat exchange medium.

In some embodiments of the present invention, the first end portion 2 and the second end portion 3 are metal pieces, respectively. Through the above arrangement, the first end portion 2 and the second end portion 3 have good heat conduction performance, so that the heat exchange medium can better cool the single battery, and the first end portion 2 and the second end portion 3 have sufficient rigidity to provide effective rigid support for the middle portion 1, thereby being beneficial to improving the reliability of the cooling plate 100.

The utility model also provides a battery package.

According to the utility model discloses battery package, include: a unit cell, and a cooling plate 100. The cooling plate 100 is the cooling plate 100 of any one of the above embodiments, the middle portion 1, the first end portion 2 and the second end portion 3 are respectively in heat exchange with the single cells, and the rigidity of the middle portion 1 is respectively smaller than the rigidity of the first end portion 2 and the rigidity of the second end portion 3 so as to be suitable for elastic deformation when the single cells expand.

For example, it may be provided that the battery pack includes a single battery and a cooling plate 100, the single battery is used for supplying power to the outside, and the single battery may generate heat in the charging and discharging process, and the cooling plate 100 is connected with the side wall of the single battery in a heat conduction manner so as to cool the single battery, so as to avoid thermal runaway caused by too high temperature of the single battery.

It should be noted that the side wall of the cooling plate 100 may be directly contacted with the side wall of the single battery, so as to reduce the processing difficulty of the battery pack and reduce the cost; or, heat conducting materials such as heat conducting glue can be coated between the side wall of the cooling plate 100 and the side wall of the single battery, so that the heat conducting performance between the cooling plate 100 and the single battery is improved, the temperature of the single battery is favorably reduced, and the reliability of the battery pack is improved.

Referring to fig. 1 to 2, the cooling plate 100 includes a first end portion 2, a middle portion 1, and a second end portion 3, and the first end portion 2, the middle portion 1, and the second end portion 3 are sequentially arranged in a second direction (up-down direction as shown in fig. 2) to dispose the first end portion 2 and the second end portion 3 at both ends of the middle portion 1, respectively. The cross sections of the first end portion 2 and the second end portion 3 may each be configured in a concave shape that is open toward the middle portion 1, the first end portion 2 is provided with first connection plates 21 respectively along both sides of the first direction (left-right direction as shown in fig. 2), and the second end portion 3 is provided with second connection plates 31 respectively along both sides of the first direction (left-right direction as shown in fig. 2), the middle portion 1 is provided with two heat exchange portions 11, and both the two heat exchange portions 11 extend in the up-down direction and are arranged at intervals in the left-right direction.

The upper end of the heat exchange section 11 located on the left side is connected to the first connection plate 21 located on the left side, the lower end of the heat exchange section 11 located on the left side is connected to the second connection plate 31 located on the left side, the upper end of the heat exchange section 11 located on the right side is connected to the first connection plate 21 located on the right side, and the lower end of the heat exchange section 11 located on the right side is connected to the second connection plate 31 located on the right side. So that the first end part 2 and the second end part 3 can fix the middle part 1 from both ends, and so that the middle part 1, the first end part 2 and the second end part 3 can jointly define a flow space 4 with both open ends, and the flow space 4 is used for circulating a heat exchange medium, which can be distilled water or the like. The side wall of the cooling plate 100 in the first direction (the left-right direction shown in fig. 2) may be arranged to be in heat conduction connection with the side wall of the single battery, so that the middle portion 1, the first end portion 2, and the second end portion 3 may respectively perform heat exchange with the single battery to achieve effective cooling of the single battery.

Wherein the stiffness of the middle portion 1 may be arranged to be smaller than the stiffness of the first end portion 2 and the stiffness of the second end portion 3, respectively, such that the middle portion 1 may be elastically deformed when subjected to a force. Like this, when battery cell produced the inflation, mid portion 1 can take place elastic deformation towards the direction of keeping away from battery cell to dodge battery cell, thereby can slow down cooling plate 100 to battery cell's extrusion degree, improved battery cell's life.

According to the utility model discloses battery package, rigidity through the mid portion 1 that sets up cooling plate 100 is less, and when battery cell took place the inflation, mid portion 1 can be towards the direction elastic deformation who keeps away from battery cell to dodge battery cell, thereby can slow down cooling plate 100 to battery cell's extrusion degree, improved battery cell's life, and improved battery cell's security, improved battery package's security.

In some embodiments of the utility model, the battery cell has a plurality of lateral walls, and a plurality of lateral walls include the heat transfer lateral wall of two relative settings, and the area of heat transfer lateral wall is greater than the area of all the other lateral walls of battery cell, cooling plate 100 and heat transfer lateral wall heat exchange. It can be understood that, through being connected two cooling plates 100 with two heat transfer lateral walls heat conduction of battery cell respectively for two cooling plates 100 can be followed battery cell's both sides and cooled off battery cell, so that battery cell holistic temperature is comparatively even, do benefit to and reduce the difference in temperature, and make cooling plate 100 great with battery cell's area of contact, do benefit to the cooling efficiency who improves battery cell, improved the reliability of battery package.

The utility model also provides a vehicle.

According to the utility model discloses vehicle, including the battery package of any one above-mentioned embodiment. Rigidity through the mid portion 1 that sets up cooling plate 100 is less, and when the battery cell took place the inflation, mid portion 1 can be towards the direction elastic deformation who keeps away from the battery cell to dodge the battery cell, thereby can slow down cooling plate 100 to the extrusion degree of battery cell, improved battery cell's life, and improved battery cell's security, improved the security of battery package, thereby promoted the wholeness ability of vehicle.

In the description of the present specification, reference to the description of "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A cooling plate, characterized in that the cooling plate (100) comprises:

a middle part (1), wherein the middle part (1) comprises two heat exchange parts (11) arranged at intervals in a first direction;

the heat exchanger comprises a first end part (2) and a second end part (3), wherein the first end part (2) and the second end part (3) are distributed at two ends of a middle part (1) in a second direction, the first end part (2) is respectively connected with two heat exchange parts (11), the second end part (3) is respectively connected with two heat exchange parts (11), the middle part (1), the first end part (2) and the second end part (3) define a flow space (4) of a heat exchange medium, the rigidity of the middle part (1) is respectively smaller than the rigidity of the first end part (2) and the rigidity of the second end part (3) so as to be suitable for elastic deformation when being subjected to external force, and the first direction and the second direction are vertically arranged.

2. A cooling plate according to claim 1, characterized in that the first end (2) and the second end (3) are of the same height in the second direction.

3. A cooling plate according to claim 1, characterized in that the first end portion (2) is provided with two first connection portions (22), the first connection portions (22) being inserted into the corresponding heat exchanging portion (11) so that the first end portion (2) and the intermediate portion (1) are fixedly connected.

4. A cooling plate according to claim 3, wherein the first connection portion (22) is provided with a first recess (221), and a portion of the heat exchanging portion (11) is filled in the corresponding first recess (221).

5. A cooling plate according to claim 1, characterized in that the second end portion (3) is provided with two second connection portions (32), which second connection portions (32) are inserted into the corresponding heat exchanging portion (11) so that the second end portion (3) and the intermediate portion (1) are fixedly connected.

6. A cooling plate according to claim 5, wherein the second connection portion (32) is provided with a second recess (321), and a part of the heat exchanging portion (11) is filled in the corresponding second recess (321).

7. A cooling plate according to claim 1, further comprising a first partition (23), the first partition (23) extending in the first direction, both ends of the first partition (23) being connected to the middle portion (1) and/or the first end portion (2) to divide a first space (41) and a second space (42), respectively.

8. A cooling plate according to claim 7, characterized in that the first space (41) and the second space (42) communicate through a first communication channel at the end of the first partition (23).

9. A cooling plate according to claim 1, further comprising a second partition (33), the second partition (33) extending in the first direction, both ends of the second partition (33) being connected to the intermediate portion (1) and/or the second end portion (3) to divide a second space (42) and a third space (43), respectively.

10. A cooling plate according to claim 9, characterized in that the second space (42) and the third space (43) communicate through a second communication passage at an end of the second partition (33).

11. A cooling plate according to any of claims 1-10, characterized in that the first end part (2) and the second end part (3) are each a metal piece.

12. A battery pack, comprising:

a single battery;

cooling plate (100), the cooling plate (100) being according to any one of claims 1-11, the intermediate portion (1), the first end portion (2) and the second end portion (3) being in heat exchange with the single cells, respectively, the intermediate portion (1) having a stiffness less than the stiffness of the first end portion (2) and the stiffness of the second end portion (3), respectively, adapted to elastically deform when the single cells expand.

13. The battery pack of claim 12, wherein the battery cell has a plurality of side walls including two oppositely disposed heat exchanging side walls having an area greater than the remaining side walls of the battery cell, the cooling plate (100) being in heat exchange with the heat exchanging side walls.

14. A vehicle characterized by comprising the battery pack according to claim 12 or 13.