CN221150140U

CN221150140U - Battery device

Info

Publication number: CN221150140U
Application number: CN202322860673.1U
Authority: CN
Inventors: 王琼; 吴全升; 刘晋
Original assignee: China Innovation Aviation Technology Group Co ltd
Current assignee: China Innovation Aviation Technology Group Co ltd
Priority date: 2023-10-24
Filing date: 2023-10-24
Publication date: 2024-06-14
Anticipated expiration: 2033-10-24

Abstract

The application discloses a battery device, which relates to the technical field of batteries, and comprises: the battery pack is provided with a bottom surface and two side surfaces which are connected with the bottom surface and are oppositely arranged; and a heat exchange plate at least partially covering the bottom surface and both side surfaces of the battery pack; the heat exchange plate is provided with a first side area, a second bottom area and a third side area; the first side region and the third side region are disposed on both sides of the battery pack, and the second bottom region is disposed on the bottom surface of the battery pack; the first side area is provided with an inlet, and the third side area is provided with an outlet; a heat exchange channel is arranged in the heat exchange plate and is communicated with the inlet and the outlet; the heat exchange channel is internally provided with a heat exchange medium, and the heat exchange medium sequentially flows through the inlet, the first side part area, the second bottom area, the third side part area and the outlet. The application can solve the problems of unbalanced overall heat exchange and difficult improvement of heat exchange efficiency of the battery pack in the prior art.

Description

Battery device

Technical Field

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

Background

In the prior art, a battery device includes a battery pack, a heat exchange plate, and a case for carrying the battery pack; in order to meet the temperature requirement of the battery device for normal operation, a heat exchange plate is generally arranged between the bottom of the battery pack and the inner bottom of the box body, and the heat exchange plate is utilized to exchange heat for the bottom of the battery pack.

But the heat in the battery pack can be dissipated to the outside from all the outer surfaces of the battery pack, and only the bottom of the battery pack is provided with a replacement hot plate, so that the overall heat exchange of the battery pack is unbalanced. In addition, for the case that the height of the battery pack is higher or the charge-discharge multiplying power is larger, the thermal management section of the battery pack needs to be increased, namely, more positions on the outer surface of the battery pack need to be subjected to heat exchange, so that the heat exchange efficiency is improved, but only the heat exchange difficult plate is arranged at the bottom of the battery pack, so that the requirement is obviously met.

Disclosure of utility model

In view of the above, the present application is directed to a battery device for solving the technical problems of unbalanced overall heat exchange and difficulty in improving heat exchange efficiency of the battery pack in the prior art.

In order to achieve the above purpose, the present application provides the following technical solutions:

The present application provides a battery device including:

The battery pack is provided with a bottom surface and two side surfaces which are connected with the bottom surface and are oppositely arranged; and

A heat exchange plate at least partially covering the bottom surface and both the side surfaces of the battery pack;

The heat exchange plate has a first side region, a second bottom region and a third side region; wherein the first side region is disposed on one of the sides of the battery pack, the second bottom region is disposed on the bottom surface of the battery pack, and the third side region is disposed on the other of the sides of the battery pack;

the first side area is provided with an inlet;

The third side region is provided with an outlet;

A heat exchange channel is arranged in the heat exchange plate and is communicated with the inlet and the outlet;

The inside of heat transfer passageway is provided with heat transfer medium, heat transfer medium flows through in proper order the import, first lateral part district, second bottom district, third lateral part district and the export.

Compared with the prior art, the technical scheme has the following beneficial effects:

The heat exchange plate is divided into three parts, and the three parts are respectively arranged on different surfaces of the battery pack, so that the heat exchange plate can be in contact with more surfaces of the battery pack, the heat exchange area of the battery pack is increased, and the heat exchange efficiency of the battery pack is improved; meanwhile, the three parts of the heat exchange plate are positioned on different surfaces of the battery pack, so that the heat exchange balance effect of the battery pack can be improved. In addition, the inlet and the outlet are arranged on the parts of the heat exchange plates corresponding to the two opposite sides of the battery pack, and under the gravity of the heat exchange medium and the action of the pressure applied to the heat exchange medium for flowing the heat exchange medium, the temperature of the heat exchange medium at the inlet is low, the flow speed is high, the temperature of the heat exchange medium at the outlet is high, the flow speed is low, and the heat exchange effect on the two sides of the battery pack can be effectively balanced.

Drawings

In order that the advantages of the application will be readily understood, a more particular description of the application briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawings. Understanding that these drawings depict only typical embodiments of the application and are not therefore to be considered to be limiting of its scope, the application will be described and explained with additional specificity and detail through the use of the accompanying drawings.

Fig. 1 is a schematic perspective view of a battery device according to an exemplary embodiment;

Fig. 2 is a schematic perspective view illustrating a battery pack according to an exemplary embodiment;

Fig. 3 is a schematic perspective view of a heat exchange plate according to an exemplary embodiment;

Fig. 4 is a schematic view showing a front view of a heat exchange plate according to an exemplary embodiment;

Fig. 5 is a schematic view of a front cut-away structure of a heat exchange plate according to an exemplary embodiment.

The reference numerals are as follows:

1-battery pack, 11-bottom, 12-side, 13-battery column, 14-battery cell;

2-heat exchanger plates, 21-first side zones, 22-second bottom zones, 23-third side zones;

3-inlet;

4-outlet;

5-flow channel, W1-first flow channel width, W2-second flow channel width, W3-third flow channel width;

6-a plugging structure;

7-end plates.

Detailed Description

In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present application. It will be apparent, however, to one skilled in the art that embodiments of the application may be practiced without one or more of these details. In other instances, well-known features have not been described in detail in order to avoid obscuring the embodiments of the application.

In the description of the application, the term "a and/or B" means all possible combinations of a and B, such as a alone, B alone or a and B, the term "at least one a or B" or "at least one of a and B" has a meaning similar to "a and/or B" and may include a alone, B alone or a and B; the singular forms "a", "an" and "the" include plural referents; the terms "inboard", "outboard", "longitudinal", "transverse", "upper", "lower", "top", "bottom", etc. indicate an orientation or positional relationship based on that shown in the drawings, are merely for convenience of description of the application and do not require that the application must be constructed and operated in a particular orientation, and therefore should not be construed as limiting the application; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Moreover, in the description of the present application, unless explicitly stated and limited otherwise, 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; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. Furthermore, the terms "exemplary" and "illustration" mean "serving as an example, embodiment, or illustration," any implementation of the application described as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments, and although various aspects of the embodiments are shown in the figures, the figures are not necessarily drawn to scale unless specifically indicated. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.

In order to facilitate understanding of the battery device provided by the application, an application scene of the battery device is firstly described, and in the prior art, a heat exchange plate in the battery device is only arranged between the bottom of a battery pack and the inner bottom of a box body, so that the overall heat exchange of the battery pack is unbalanced; in addition, for the case that the height of the battery pack is high or the charge-discharge multiplying power is high, the thermal management section of the battery pack needs to be increased, and the scheme that only the heat exchange difficult plate is arranged at the bottom of the battery pack is obvious to meet the requirement.

Therefore, the application provides a battery device, thereby solving the technical problems that the overall heat exchange of the battery pack in the prior art is unbalanced and the heat exchange efficiency is difficult to improve.

The technical solution of the present embodiment is described in detail below with reference to the accompanying drawings, and the following embodiments and implementations may be combined with each other without conflict.

In an exemplary embodiment of the present application, a battery device is provided, as shown in fig. 1 to 5, fig. 1 is a schematic perspective view of a battery device according to an exemplary embodiment; fig. 2 is a schematic perspective view illustrating a battery pack according to an exemplary embodiment; fig. 3 is a schematic perspective view of a heat exchange plate according to an exemplary embodiment; fig. 4 is a schematic view showing a front view of a heat exchange plate according to an exemplary embodiment; fig. 5 is a schematic view of a front cut-away structure of a heat exchange plate according to an exemplary embodiment.

As shown in fig. 1, the battery device comprises a battery pack 1 and a heat exchange plate 2, wherein the heat exchange plate 2 covers the outer surface of the battery pack 1 and can exchange heat for the battery pack 1 so as to meet the temperature requirement for enabling the battery pack 1 to work normally.

In the present embodiment, as shown in fig. 2, the battery pack 1 has a bottom surface 11 and two side surfaces 12 that are connected to the bottom surface 11 and are disposed opposite to each other. The bottom surface 11 and the two side surfaces 12 of the battery pack 1 may be: after the battery pack 1 is assembled into a container (the container may be a battery case) that carries it, the side of the bottom wall of the battery pack 1 that faces the inside of the container is the bottom surface 11 of the battery pack 1; the side of the battery 1 facing the side wall of the container is the side 12 of the battery 1, and the two sides 12 of the battery 1 are opposite.

In the present embodiment, as shown in fig. 1, the heat exchange plate 2 at least partially covers the bottom surface 11 and both side surfaces 12 of the battery pack 1. In particular, the heat exchanger plate 2 may be divided into three parts, i.e. the heat exchanger plate 2 has a first side area 21, a second bottom area 22 and a third side area 23; wherein a first side region 21 is provided on one side 12 of the battery pack 1, a second bottom region 22 is provided on the bottom surface 11 of the battery pack 1, and a third side region 23 is provided on the other side 12 of the battery pack 1. The heat exchange plate 2 can exchange heat for different surfaces of the battery pack 1 by utilizing the one-to-one correspondence of the three parts.

Alternatively, as shown in fig. 3, the heat exchange plate 2 has a U-shaped structure, that is, a structure formed by enclosing the first side area 21, the second bottom area 22 and the third side area 23 together is U-shaped. The heat exchange plate 2 of this construction may be used as a container or part of a container carrying the battery 1; the heat exchange plate 2 is described as a part of a container for carrying the battery pack 1 as an example: in the heat exchange plate 2, the second bottom section 22 may be carried at the bottom of the battery pack 1, the first side section 21 and the third side section 23 are disposed opposite to each other and both are disposed at the two sides 12 of the battery pack 1, the other part of the container carrying the battery pack 1 may be two end plates 7, the two end plates 7 are disposed opposite to each other and connected between the first side section 21 and the third side section 23, respectively, that is, the two end plates 7 and the first side section 21 and the third side section 23 may together enclose a fence which may be used to restrict four outer peripheral surfaces of the battery pack 1; the first side portion 21 and the third side portion 23 may be connected to the two end plates 7 by screwing or welding, and the like, but is not limited thereto.

In the present embodiment, as shown in fig. 1, 3 and 4, the first side section 21 is provided with an inlet 3 and the third side section 23 is provided with an outlet 4; the heat exchange plate 2 is internally provided with a heat exchange channel which is communicated with the inlet 3 and the outlet 4. Wherein, the inlet 3, the heat exchange channel and the outlet 4 are communicated in sequence, and the three form a heat exchange pipeline of the heat exchange plate 2. It will be appreciated that part of the heat exchange channels are provided in all three sections of the heat exchange plate 2, i.e. the heat exchange channels are divided into three sections which are end to end and which are arranged inside the first side section 21, the second bottom section 22 and the third side section 23, respectively.

The inside of the heat exchange channel is also provided with a heat exchange medium, the heat exchange medium can flow in the heat exchange pipeline under the driving of a power mechanism (the power mechanism can be a pump), and the flow path of the heat exchange medium in the heat exchange pipeline is as follows: the heat exchange medium flows through the inlet 3, the first side section 21, the second bottom section 22, the third side section 23 and the outlet 4 in this order. It should be noted that the heat exchange medium flows from top to bottom in the first side region 21 to flow from the first side region 21 to the second bottom region 22; the heat exchange medium flows from bottom to top in the third side zone 23 to flow from the second bottom zone 22 to the third side zone 23.

By adopting the structural design, the heat exchange plate 2 is divided into three parts, namely the first side part area 21, the second bottom part area 22 and the third side part area 23, and the three parts are respectively arranged on different surfaces of the battery pack 1, so that the heat exchange plate 2 can be in contact with more surfaces of the battery pack 1, the heat exchange area of the battery pack 1 is increased, and the heat exchange efficiency of the battery pack 1 is improved; meanwhile, the three parts of the heat exchange plate 2 are positioned on different surfaces of the battery pack 1, so that the heat exchange balance effect of the battery pack 1 can be improved.

In addition, as shown in fig. 3 and 4, the inlet 3 and the outlet 4 are provided on the portions of the heat exchange plate 2 corresponding to the opposite sides 12 of the battery pack 1, that is, the inlet 3 is provided in the first side region 21 and the outlet 4 is provided in the third side region 23. When the heat exchange medium just starts to flow into the inlet 3, the temperature of the heat exchange medium is relatively low, and the heat exchange medium can quickly flow into the second bottom area 22 from the first side area 21 due to the dual functions of gravity and water pressure, so that the flow rate of the heat exchange medium can be accelerated, and the heat exchange efficiency is improved, namely, the heat exchange medium flowing into the inlet 3 has the characteristics of low temperature and high flow rate when flowing through the first side area 21 due to the inlet 3 arranged in the first side area 21; when the heat exchange medium flows into the third side area 23, the flow resistance becomes large because the heat exchange medium needs to overcome the action of gravity, and at this time, the heat exchange medium flows through the first side area 21 and the second bottom area 22 and exchanges heat with the corresponding surface of the battery pack 1, so that the temperature of the heat exchange medium in the third side area 23 is higher than that of the heat exchange medium at the inlet 3, and more contact between the heat exchange medium and the battery is needed to take away more heat, therefore, the contact time between the heat exchange medium and the battery pack 1 can be increased by arranging the outlet 4 in the third side area 23, especially arranging the outlet 4 in the higher position of the third side area 23; namely, the outlet 4 is arranged in the third side part area 23, so that the heat exchange medium flowing out of the outlet 4 has the characteristics of high temperature and low flow rate when flowing through the third side part area 23; in summary, the inlet 3 is disposed in the first side region 21 and the outlet 4 is disposed in the third side region 23, so that the heat exchange mediums with different temperatures have different flow rates in the first side region 21 and the third side region 23, so that the heat exchange time between the heat exchange mediums with different temperatures and the battery pack 1 is different, and the purpose of balancing the heat exchange effects on both sides of the battery pack 1 is achieved.

In some exemplary embodiments, the orthographic projections of inlet 3 and outlet 4 on the same side 12 of battery pack 1 coincide.

In this embodiment, since the temperature of the heat exchange medium at the inlet 3 is lowest and the temperature of the heat exchange medium at the outlet 4 is highest, the orthographic projection coincidence of the inlet 3 and the outlet 4 means that the heat exchange medium at the inlet 3 and the heat exchange medium at the outlet 4 relatively act on two sides of the battery pack 1, which is beneficial to the overall heat exchange balance of the battery pack 1.

In some exemplary embodiments, as shown in fig. 2, the battery pack 1 includes a plurality of battery strings 13, and when the plurality of battery strings 13 is provided, the arrangement direction of the plurality of battery strings 13 is set as a first direction; the first side region 21 and the third side region 23 are disposed on both sides 12 of the battery pack 1, respectively, in the first direction; the battery column 13 includes a plurality of battery cells 14 that are sequentially arranged, and the arrangement direction of the plurality of battery cells 14 is set to be a second direction, and the second direction is perpendicular to the first direction; the outermost battery cell 14 along the second direction in the same battery column 13 is set as the outermost battery cell; the inlet 3 and the outlet 4 are disposed at both sides of the outermost battery cell, respectively, in the first direction.

It should be noted that, when the battery pack 1 includes only one battery string 13, the outermost battery cell refers to a single battery cell of the battery string 13 that is outermost in the second direction, and the inlet 3 and the outlet 4 are disposed on both sides of the single battery cell in the first direction, respectively; when the battery pack 1 includes a plurality of battery strings 13, the outermost battery cells refer to an aggregate of the single battery cells outermost in the second direction among all the battery strings 13, all the battery cells 14 in the aggregate are arranged in the first direction, and at this time, the inlet 3 and the outlet 4 are respectively disposed on both sides of the aggregate in the first direction.

In this embodiment, the heat dissipation effect of the battery cell at the outermost side (i.e., the outermost battery cell) of the battery pack 1 is best, the inlet 3 and the outlet 4 are respectively disposed at two sides of the outermost battery cell along the first direction, and the heat exchange medium at the inlet 3 and the heat exchange medium at the outlet 4 can exchange heat by using the outermost battery cell or the end plate 7 attached to the outermost battery cell, so as to reduce the temperature difference between the heat exchange medium at the inlet 3 and the heat exchange medium at the outlet 4, and further improve the heat dissipation balance at two sides of the battery pack 1.

In some exemplary embodiments, as shown in fig. 3 and 4, the inlet 3 is disposed at the beginning of the heat exchange channel and/or the outlet 4 is disposed at the end of the heat exchange channel.

In this embodiment, the start end and the tail end are two end portions of the heat exchange channel, if the inlet 3 is not disposed at the start end and/or the outlet 4 is not disposed at the tail end, a part of the heat exchange medium stays between the inlet 3 and the start end and/or between the outlet 4 and the tail end, so that the part of the heat exchange medium has poor fluidity, and the heat exchange medium with poor fluidity easily forms a section of dead zone in the heat exchange channel, thereby affecting the heat exchange effect.

In some exemplary embodiments, as shown in fig. 5, the heat exchange channel includes a plurality of flow channels 5 arranged side by side and in sequential end-to-end communication; the flow channels 5 extend in a direction parallel to the bottom face 11 and the two side faces 12 of the battery pack 1.

In this embodiment, the sequential end-to-end communication of the plurality of flow channels 5 can be understood as: the head end of the flow channel 5 is the inlet end of the heat exchange medium entering the flow channel 5, and the tail end of the flow channel 5 is the outlet end of the heat exchange medium flowing out of the flow channel 5; in the two adjacent flow channels 5, for example, a first flow channel is adjacent to a second flow channel, and the heat exchange medium flows from the first flow channel to the second flow channel, the tail end of the first flow channel is communicated with the head end of the second flow channel, and the heat exchange medium flows out from the tail end of the first flow channel and then enters the second flow channel from the head end of the second flow channel.

In the present embodiment, the plurality of flow channels 5 are arranged side by side, and the extending direction of the flow channels 5 is parallel to the bottom surface 11 and the two side surfaces 12 of the battery pack 1. The direction of extension of the flow channel 5 can be understood as: the battery pack 1 comprises a plurality of battery columns 13, the battery columns 13 comprise a plurality of battery cells 14 which are sequentially arranged, and the flow channels 5 can extend along the arrangement direction of the plurality of battery cells 14; with the height direction of the battery cells 14 as vertical, the plurality of flow channels 5 are sequentially arranged side by side from top to bottom along the height direction of the battery cells 14, that is, each flow channel 5 is horizontally arranged. By designing the heat exchange channels into a plurality of flow channels 5 which are horizontally arranged side by side and the flow channels 5 are communicated end to end, the heat exchange medium flowing in the first side area 21 can be prevented from having an excessive gravity acceleration area and the heat exchange medium flowing in the third side area 23 can be prevented from having an excessive gravity deceleration area, so that the heat exchange medium can be ensured to have enough time to exchange heat with the battery pack 1 fully; and the heat exchange medium flows through the first side part area 21, the second bottom part area 22 and the third side part area 23 along the flow channel 5 in sequence, so that the flow path of the heat exchange medium in the heat exchange plate 2 can be optimized, the heat exchange medium and the battery pack 1 have sufficient heat exchange area, and the heat exchange effect can be further improved.

Further, the width of the flow channel 5 in the third direction in the first side section 21 is set to be the first flow channel width W1; wherein the third direction is the arrangement direction of the flow channels 5 in the plurality of first side regions 21, and the third direction is parallel to the side 12 of the battery pack 1 where the first side regions 21 are arranged; the width of the flow channel 5 in the second bottom area 22 along the fourth direction is set as a second flow channel width W2; wherein the fourth direction is the arrangement direction of the flow channels 5 in the plurality of second bottom regions 22, and the fourth direction is parallel to the bottom surface 11 in the battery pack 1; the first flow channel width W1 is greater than the second flow channel width W2.

When the heat exchange medium flows from the flow channel 5 in the first side area 21 to the flow channel 5 in the second bottom area 22, the flow resistance is increased when the heat exchange medium flows to the flow channel 5 in the second bottom area 22 because the width of the flow channel 5 in the first side area 21 is larger than the width of the flow channel 5 in the second bottom area 22, so that the heat exchange medium in the flow channel 5 of the first side area 21 cannot flow to the second bottom area 22 all quickly due to the gravity effect, the outflow speed of the heat exchange medium in the flow channel 5 of the first side area 21 is slowed down, and the heat exchange medium can have enough time to exchange heat with the first side area 21, so that the heat exchange effect of the first side area 21 is improved.

Optionally, the ratio a of the first channel width W1 to the second channel width W2 is in the range of: a is more than 1 and less than or equal to 3. The ratio a should not be too large, otherwise, the first flow channel width W1 is far greater than the second flow channel width W2, so that the flow resistance is too large when the heat exchange medium flows into the flow channel 5 in the second bottom area 22, which can seriously affect the heat exchange medium entering into the second bottom area 22 from the first side area 21, and affect the overall heat exchange effect of the battery pack 1; moreover, the ratio a should not be too small, otherwise, the first flow channel width W1 is almost equal to the second flow channel width W2, so that the flow resistance is small when the heat exchange medium flows into the flow channel 5 in the second bottom area 22, and the outflow speed of the heat exchange medium in the flow channel 5 of the first side area 21 is not effectively slowed down, which is not beneficial to improving the heat exchange effect of the first side area 21.

Further, the width of the flow channel 5 in the fifth direction in the third side section 23 is set to be a third flow channel width W3; wherein the fifth direction is the arrangement direction of the flow channels 5 in the plurality of third side regions 23, and the fifth direction is parallel to the side 12 of the battery pack 1 where the third side regions 23 are disposed; the third flow channel width W3 coincides with the first flow channel width W1, or the third flow channel width W3 is smaller than the first flow channel width W1.

Optionally, the ratio b of the first flow channel width W1 to the third flow channel width W3 is in the range of: b is more than or equal to 1 and less than or equal to 3. The ratio b should not be too large, otherwise, the first flow channel width W1 is far greater than the third flow channel width W3, so that the flow resistance is too large when the heat exchange medium flows into the flow channel 5 in the third side portion 23, which can seriously affect the heat exchange medium entering the third side portion 23 from the first side portion 21 and the second bottom portion 22, and affect the overall heat exchange effect of the battery pack 1; moreover, the ratio b should not be too small, otherwise the first flow channel width W1 is much smaller than the third flow channel width W3, so that the heat exchange medium passing through the first side portion 21 and the second bottom portion 22 is difficult to fill the flow channel 5 in the third side portion 23 after entering the third side portion 23, so that the heat exchange area of the heat exchange medium and the battery pack 1 is insufficient, and the heat exchange effect of the side 12 of the battery pack 1 corresponding to the third side portion 23 is affected.

In some exemplary embodiments, the heat exchange plate 2 is made by extrusion molding of a profile, and both ends of the heat exchange channel are provided with plugging structures 6.

Alternatively, as shown in fig. 1, 3 and 4, the plugging structure 6 is a plugging strip, and the plugging strip is connected to the end of the heat exchange channel in a welding manner.

In this embodiment, the heat exchange plate 2 has a profile structure, a part of the end of the heat exchange plate 2 is removed and the cavity in the heat exchange plate 2 is exposed, and the rest of the end of the heat exchange plate 2 can be connected with the end plate 7 by riveting or welding; wherein the end plate 7 may be used as part of the structure of a container for carrying the battery pack 1. The cavity in the heat exchange plate 2 can be used as a runner 5, and the part of the cavity exposed at the end part of the heat exchange plate 2 can be blocked by a blocking structure 6; it should be understood that, since the plurality of flow channels 5 in this embodiment are connected end to end, the end to end connection of two adjacent flow channels 5 is provided with an overflow channel, and the plugging structure 6 does not plug the overflow channel after being connected to the heat exchange plate 2.

The embodiment discloses a battery device, which comprises a battery pack 1 and a heat exchange plate 2, wherein the heat exchange plate 2 is U-shaped and exchanges heat for three sides of the battery pack 1, so that the heat exchange efficiency can be improved and the heat exchange balance of two sides of the battery pack 1 can be ensured; in addition, the inlet 3 and the outlet 4 are arranged on the parts of the heat exchange plates 2 corresponding to the two opposite side surfaces 12 of the battery pack 1, and under the action of gravity of the heat exchange medium and the pressure applied to the heat exchange medium for flowing the heat exchange medium, the temperature of the heat exchange medium at the inlet 3 is low, the flow speed is high, the temperature of the heat exchange medium at the outlet 4 is high, the flow speed is low, and the heat exchange effect on the two sides of the battery pack 1 can be further effectively balanced.

While the fundamental and principal features of the application and advantages of the application have been shown and described, it will be apparent to those skilled in the art that the application is not limited to the details of the foregoing exemplary embodiments, but may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims

1. A battery device, characterized by comprising:

the first side area is provided with an inlet;

The third side region is provided with an outlet;

2. The battery device of claim 1, wherein the orthographic projections of the inlet and the outlet on the same side of the battery pack coincide.

3. The battery device according to claim 1, wherein the battery pack includes a plurality of battery strings, and when the plurality of battery strings are provided, an arrangement direction of the plurality of battery strings is set to be a first direction;

The first side region and the third side region are disposed on both the sides of the battery pack, respectively, in the first direction;

the battery column comprises a plurality of battery cells which are sequentially arranged, the arrangement direction of the plurality of battery cells is set to be a second direction, and the second direction is perpendicular to the first direction;

Setting the outermost battery cell along the second direction in the same battery column as the outermost battery cell;

the inlet and the outlet are respectively arranged at two sides of the outermost battery cell along the first direction.

4. The battery device according to claim 1, wherein the inlet is provided at a beginning of the heat exchange channel and/or the outlet is provided at a tail end of the heat exchange channel.

5. The battery device according to any one of claims 1 to 4, wherein the heat exchange passage includes a plurality of flow passages arranged side by side and communicating end to end in sequence;

The extending direction of the flow channel is parallel to the bottom surface and the two side surfaces of the battery pack.

6. The battery device according to claim 5, wherein a width of the flow channel in the first side region in the third direction is set to be a first flow channel width;

The third direction is the arrangement direction of the flow channels in the plurality of first side regions, and is parallel to the side surface of the battery pack, on which the first side regions are arranged;

Setting the width of the flow channel in the second bottom area along the fourth direction as the width of the second flow channel;

Wherein the fourth direction is an arrangement direction of the flow channels in the plurality of second bottom regions, and the fourth direction is parallel to the bottom surface in the battery pack;

the first flow channel width is greater than the second flow channel width.

7. The battery device of claim 6, wherein the ratio a of the first flow channel width to the second flow channel width is in the range of: a is more than 1 and less than or equal to 3.

8. The battery device according to claim 6, wherein a width of the flow channel in the third side region in the fifth direction is set to be a third flow channel width;

The fifth direction is the arrangement direction of the flow channels in the plurality of third side regions, and is parallel to the side surface of the battery pack, on which the third side regions are arranged;

The third flow channel width is consistent with the first flow channel width or the third flow channel width is less than the first flow channel width.

9. The battery device of claim 8, wherein the ratio b of the first flow channel width to the third flow channel width is in the range of: b is more than or equal to 1 and less than or equal to 3.

10. The battery device according to claim 1, wherein the heat exchange plate is made by extrusion molding of a profile, and both ends of the heat exchange channel are provided with plugging structures.