CN221150140U - Battery device - Google Patents

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

A battery device

Technical Field

The present application relates to the field of battery technology, and in particular to a battery device.

Background technique

In the prior art, a battery device includes a battery pack, a heat exchange plate, and a box for supporting the battery pack. In order to meet the temperature requirements for normal operation of the battery device, the heat exchange plate is usually arranged between the bottom of the battery pack and the inner bottom of the box, and the heat exchange plate is used to exchange heat for the bottom of the battery pack.

However, the heat in the battery pack can be dissipated from all the outer surfaces of the battery pack. If the heat exchange plate is only set at the bottom of the battery pack, the overall heat exchange of the battery pack will be uneven. In addition, for the case of a high battery pack or a large charge and discharge rate, it is necessary to increase the thermal management cross-section of the battery pack, that is, it is necessary to exchange heat at more locations on the outer surface of the battery pack to improve the heat exchange efficiency. However, it is obviously not enough to set the heat exchange plate only at the bottom of the battery pack to meet the needs.

Utility Model Content

In view of this, the purpose of the present application is to provide a battery device for solving the technical problems existing in the prior art that the overall heat exchange of the battery pack is unbalanced and it is difficult to improve the heat exchange efficiency.

To achieve the above objectives, this application provides the following technical solutions:

The present application provides a battery device, comprising:

A battery pack, the battery pack having a bottom surface and two side surfaces connected to the bottom surface and arranged opposite to each other; and

a heat exchange plate, the heat exchange plate at least partially covering the bottom surface and the two 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 arranged on one side of the battery pack, the second bottom region is arranged on the bottom surface of the battery pack, and the third side region is arranged on the other side of the battery pack;

The first side region is provided with an inlet;

The third side area is provided with an outlet;

A heat exchange channel is provided inside the heat exchange plate, and the heat exchange channel is connected with the inlet and the outlet;

A heat exchange medium is arranged inside the heat exchange channel, and the heat exchange medium flows through the inlet, the first side area, the second bottom area, the third side area and the outlet in sequence.

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

By dividing the heat exchange plate into three parts and setting the three parts on different sides of the battery pack, the heat exchange plate can contact more surfaces of the battery pack, increasing the heat exchange area of the battery pack and improving the heat exchange efficiency of the battery pack; at the same time, the three parts of the heat exchange plate are located on different sides of the battery pack, which can improve the heat exchange balance effect of the battery pack. In addition, the inlet and outlet are set on the parts of the heat exchange plate corresponding to the two opposite sides of the battery pack. Under the action of the gravity of the heat exchange medium and the pressure applied to the heat exchange medium to make the heat exchange medium flow, the heat exchange medium at the inlet has a low temperature and a fast flow rate, and the heat exchange medium at the outlet has a high temperature and a slow flow rate, which can effectively balance the heat exchange effect on both sides of the battery pack.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to make the advantages of the present application more easily understood, the present application briefly described above will be described in more detail by referring to the specific embodiments shown in the accompanying drawings. It can be understood that these drawings only depict typical embodiments of the present application and therefore should not be considered as limiting the scope of protection thereof. The present application is described and explained with additional characteristics and details through the accompanying drawings.

FIG1 is a schematic diagram of a three-dimensional structure of a battery device according to an exemplary embodiment;

FIG2 is a schematic diagram of a three-dimensional structure of a battery pack according to an exemplary embodiment;

FIG3 is a schematic diagram of a three-dimensional structure of a heat exchange plate according to an exemplary embodiment;

FIG4 is a schematic diagram of a front structural view of a heat exchange plate according to an exemplary embodiment;

Fig. 5 is a schematic diagram of a front cross-sectional 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 exchange plate, 21-first side zone, 22-second bottom zone, 23-third side zone;

3- Import;

4-Export;

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

6-Plugging structure;

7- End plate.

Detailed ways

In the following description, a large number of specific details are provided to provide a more thorough understanding of the present application. However, it is obvious to those skilled in the art that the present application embodiments can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present application embodiments, some technical features well known in the art are not described.

In the description of the present application, the term "A and/or B" means all possible combinations of A and B, such as only A, only B, or A and B. The term "at least one A or B" or "at least one of A and B" has a similar meaning to "A and/or B", and may include only A, only B, or A and B. The singular terms "one" and "this" may also include the plural form. The orientation or position relationship indicated by the terms "inside", "outside", "longitudinal", "lateral", "upper", "lower", "top", "bottom", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and does not require that the present application must be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. The terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Moreover, in the description of the present application, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. In addition, the term "exemplary" means "used as an example, embodiment or illustrative", and any implementation described in this application as "exemplary" is not necessarily interpreted as being superior or better than other embodiments. Although various aspects of the embodiments are shown in the drawings, the drawings are not necessarily drawn to scale unless otherwise specified. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood in specific circumstances.

To facilitate understanding of the battery device provided in the present application, its application scenario is first explained. In the prior art, the heat exchange plate in the battery device is only arranged between the bottom of the battery pack and the inner bottom of the box, resulting in uneven overall heat exchange of the battery pack; in addition, for the case where the battery pack is high or the charge and discharge rate is large, it is necessary to increase the thermal management cross-section of the battery pack. The solution of only setting the heat exchange plate at the bottom of the battery pack obviously meets the needs.

To this end, the present application provides a battery device to solve the technical problems in the prior art that the overall heat exchange of the battery pack is unbalanced and it is difficult to improve the heat exchange efficiency.

The technical solution of this embodiment is described in detail below in conjunction with the accompanying drawings. The following embodiments and implementation methods can be combined with each other if there is no conflict.

A battery device is provided in an exemplary embodiment of the present application, as shown in Figures 1 to 5, wherein Figure 1 is a schematic diagram of the three-dimensional structure of a battery device according to an exemplary embodiment; Figure 2 is a schematic diagram of the three-dimensional structure of a battery pack according to an exemplary embodiment; Figure 3 is a schematic diagram of the three-dimensional structure of a heat exchange plate according to an exemplary embodiment; Figure 4 is a schematic diagram of the front view structure of a heat exchange plate according to an exemplary embodiment; and Figure 5 is a schematic diagram of the front view cross-sectional structure of a heat exchange plate according to an exemplary embodiment.

As shown in FIG. 1 , the battery device includes a battery pack 1 and a heat exchange plate 2 . The heat exchange plate 2 covers the outer surface of the battery pack 1 and can exchange heat for the battery pack 1 to meet the temperature requirement for the battery pack 1 to work normally.

In this embodiment, as shown in FIG2 , the battery pack 1 has a bottom surface 11 and two side surfaces 12 connected to the bottom surface 11 and arranged 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 box) that carries the battery pack 1, the side of the bottom wall of the battery pack 1 facing the interior of the container is the bottom surface 11 of the battery pack 1; the side of the side wall of the battery pack 1 facing the interior of the container is the side surface 12 of the battery pack 1, and the two side surfaces 12 of the battery pack 1 in the foregoing text are arranged opposite to each other.

In this embodiment, as shown in FIG1 , the heat exchange plate 2 at least partially covers the bottom surface 11 and two side surfaces 12 of the battery pack 1. Specifically, the heat exchange plate 2 can be divided into three parts, that is, the heat exchange plate 2 has a first side area 21, a second bottom area 22 and a third side area 23; wherein the first side area 21 is arranged on one side surface 12 of the battery pack 1, the second bottom area 22 is arranged on the bottom surface 11 of the battery pack 1, and the third side area 23 is arranged on the other side surface 12 of the battery pack 1. The heat exchange plate 2 can use its three parts to correspond one-to-one to different surfaces of the battery pack 1 for heat exchange.

Optionally, as shown in FIG3 , the heat exchange plate 2 is in a U-shaped structure, that is, the first side area 21, the second bottom area 22 and the third side area 23 together form a U-shaped structure. The heat exchange plate 2 of this structure can be used as a container or a part of a container for carrying the battery pack 1; the heat exchange plate 2 is used as a part of a container for carrying the battery pack 1 as an example for explanation: in the heat exchange plate 2, the second bottom area 22 can be carried at the bottom of the battery pack 1, the first side area 21 and the third side area 23 are arranged oppositely and both are arranged on the two side surfaces 12 of the battery pack 1, and the other part of the container for carrying the battery pack 1 can be two end plates 7, which are arranged oppositely and respectively connected between the first side area 21 and the third side area 23, that is, the two end plates 7 and the first side area 21 and the third side area 23 can together form an enclosure, which can be used to limit the four peripheral surfaces of the battery pack 1; wherein, the connection between the first side area 21 and the third side area 23 and the two end plates 7 can be screwed or welded, etc., which is not limited here.

In this embodiment, as shown in FIG. 1 , FIG. 3 and FIG. 4 , the first side area 21 is provided with an inlet 3, and the third side area 23 is provided with an outlet 4; a heat exchange channel is provided inside the heat exchange plate 2, and the heat exchange channel is connected with the inlet 3 and the outlet 4. Among them, the inlet 3, the heat exchange channel and the outlet 4 are connected in sequence, and the three constitute the heat exchange pipeline of the heat exchange plate 2. It should be understood that the three parts of the heat exchange plate 2 are each provided with a partial heat exchange channel, that is, the heat exchange channel is divided into three parts connected end to end, and the three parts of the heat exchange channel are respectively provided inside the first side area 21, the second bottom area 22 and the third side area 23.

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

With the above structural design, the heat exchange plate 2 is divided into three parts, namely, a first side area 21, a second bottom area 22 and a third side 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, thereby increasing the heat exchange area of the battery pack 1 and improving the heat exchange efficiency of the battery pack 1; at the same time, the three parts of the heat exchange plate 2 are located on different surfaces of the battery pack 1, which can improve the heat exchange balance effect of the battery pack 1.

In addition, as shown in FIG3 and FIG4, the inlet 3 and the outlet 4 are arranged on the portion of the heat exchange plate 2 corresponding to the two opposite sides 12 of the battery pack 1, that is, the inlet 3 is arranged in the first side area 21, and the outlet 4 is arranged in the third side area 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 due to the dual effects of gravity and water pressure, the heat exchange medium can quickly flow from the first side area 21 to the second bottom area 22, which can accelerate the flow rate of the heat exchange medium and improve the heat exchange efficiency. That is, since the inlet 3 is arranged in the first side area 21, the heat exchange medium flowing in from the inlet 3 has the characteristics of low temperature and fast flow rate when flowing through the first side area 21; when the heat exchange medium flows into the third side area 23, the flow resistance becomes larger because the heat exchange medium needs to overcome the effect of gravity, and at this time, the heat exchange medium has flowed 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 the temperature of the heat exchange medium at the inlet 3. The heat exchange medium needs to have more contact with the battery to take away more heat, so the outlet 4 is arranged in the third side zone 23, especially the outlet 4 is arranged at a higher position in the third side zone 23, so as to increase the contact time between the heat exchange medium and the battery pack 1; that is, since the outlet 4 is arranged in the third side zone 23, the heat exchange medium flowing out of the outlet 4 has the characteristics of high temperature and slow flow rate when flowing through the third side zone 23; in summary, it can be seen that by arranging the inlet 3 in the first side zone 21 and the outlet 4 in the third side zone 23, the heat exchange medium with different temperatures can have different flow rates in the first side zone 21 and the third side zone 23, so as to make the heat exchange time between the heat exchange medium with different temperatures and the battery pack 1 different, and finally achieve the purpose of balancing the heat exchange effect on both sides of the battery pack 1.

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

In this embodiment, since the temperature of the heat exchange medium at the inlet 3 is relatively the lowest and the temperature of the heat exchange medium at the outlet 4 is relatively the highest, the coincidence of the orthographic projections 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 act relatively on the 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 columns 13. When there are multiple battery columns 13, the arrangement direction of the multiple battery columns 13 is set to a first direction; the first side area 21 and the third side area 23 are respectively arranged on two side surfaces 12 of the battery pack 1 along the first direction; the battery column 13 includes a plurality of battery cells 14 arranged in sequence, and the arrangement direction of the multiple battery cells 14 is set to a second direction, and the second direction is perpendicular to the first direction; the outermost battery cell 14 in the same battery column 13 along the second direction is set to be the outermost battery cell; the inlet 3 and the outlet 4 are respectively arranged on both sides of the outermost battery cell along the first direction.

It should be noted that, when the battery pack 1 includes only one battery column 13, the outermost battery cell refers to the single battery cell that is the outermost in the battery column 13 along the second direction, and at this time the inlet 3 and the outlet 4 are respectively arranged on both sides of the single battery cell along the first direction; when the battery pack 1 includes multiple battery columns 13, the outermost battery cell refers to the collection of single battery cells that are the outermost in all battery columns 13 along the second direction, and all battery cells 14 in the collection are arranged along the first direction, and at this time the inlet 3 and the outlet 4 are respectively arranged on both sides of the collection along the first direction.

In this embodiment, the outermost battery cell of the battery pack 1 (i.e., the outermost battery cell) has the best heat dissipation effect, and the inlet 3 and the outlet 4 are respectively arranged on both sides of the outermost battery cell along the first direction. The heat exchange medium at the inlet 3 and the heat exchange medium at the outlet 4 can use the outermost battery cell or the end plate 7 attached to the outermost battery cell for heat exchange, 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, which can further improve the heat dissipation balance on both sides of the battery pack 1.

In some exemplary embodiments, as shown in FIG. 3 and FIG. 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 starting end and the tail end are the two ends of the heat exchange channel. If the inlet 3 is not set at the starting end and/or the outlet 4 is not set at the tail end, a part of the heat exchange medium will be retained between the inlet 3 and the starting end and/or between the outlet 4 and the tail end, causing the poor fluidity of this part of the heat exchange medium. The heat exchange medium with poor fluidity can easily form a dead zone in the heat exchange channel, 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 connected end to end in sequence; the extension direction of the flow channels 5 is parallel to the bottom surface 11 and two side surfaces 12 of the battery pack 1 .

In this embodiment, multiple flow channels 5 are connected end to end in sequence, which can be understood as follows: the head end of the flow channel 5 is the entrance end where the heat exchange medium enters the flow channel 5, and the tail end of the flow channel 5 is the outlet end where the heat exchange medium flows out of the flow channel 5; in two adjacent flow channels 5, for example, the first flow channel is adjacent to the 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 connected to 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 enters the second flow channel from the head end of the second flow channel.

In this embodiment, a plurality of flow channels 5 are arranged side by side, and the extension 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 extension direction of the flow channels 5 can be understood as follows: the battery pack 1 includes a plurality of battery columns 13, the battery columns 13 include a plurality of battery cells 14 arranged in sequence, 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 the vertical direction, the plurality of flow channels 5 are arranged side by side in sequence from top to bottom along the height direction of the battery cells 14, that is, each flow channel 5 is arranged horizontally. By designing the heat exchange channel as a plurality of flow channels 5 arranged horizontally side by side, and the flow channels 5 are connected end to end, it is possible to avoid the heat exchange medium circulating in the first side area 21 from having an excessive gravity acceleration area and to avoid the heat exchange medium circulating in the third side area 23 from having an excessive gravity deceleration area, so as to ensure that the heat exchange medium has sufficient time to fully exchange heat with the battery pack 1; and the heat exchange medium flows along the flow channel 5 in sequence through the first side area 21, the second bottom area 22 and the third side area 23, which can optimize the flow path of the heat exchange medium in the heat exchange plate 2, so that there is a sufficient heat exchange area between the heat exchange medium and the battery pack 1, and the heat exchange effect can be further improved.

Further, the width of the flow channel 5 in the first side area 21 along the third direction is set as a first flow channel width W1; wherein the third direction is the arrangement direction of the flow channels 5 in the multiple first side areas 21, and the third direction is parallel to the side surface 12 of the battery pack 1 on which the first side area 21 is provided; 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 multiple second bottom areas 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, since the width of the flow channel 5 in the first side area 21 is greater than the width of the flow channel 5 in the second bottom area 22, the flow resistance increases when the heat exchange medium flows to 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 will not flow quickly to the second bottom area 22 due to its gravity, which slows down the outflow speed of the heat exchange medium in the flow channel 5 of the first side area 21, so that the heat exchange medium can have sufficient time to exchange heat with the first side area 21, so as to improve the heat exchange effect of the first side area 21.

Optionally, the value range of the ratio a of the first flow channel width W1 to the second flow channel width W2 is: 1＜a≤3. Among them, the ratio a should not be too large, otherwise the first flow channel width W1 is much larger than the second flow channel width W2, so that the flow resistance of the heat exchange medium when flowing to the flow channel 5 in the second bottom area 22 is too large, which will seriously affect the heat exchange medium from the first side area 21 to the second bottom area 22, affecting the overall heat exchange effect of the battery pack 1; and 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 of the heat exchange medium when flowing to the flow channel 5 in the second bottom area 22 is small, and it will not effectively slow down the outflow speed of the heat exchange medium in the flow channel 5 of the first side area 21, which is not conducive to improving the heat exchange effect of the first side area 21.

Further, the width of the flow channel 5 in the third side area 23 along the fifth direction is assumed 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 areas 23, and the fifth direction is parallel to the side surface 12 of the battery pack 1 on which the third side area 23 is provided; the third flow channel width W3 is consistent 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 value range of the ratio b of the first flow channel width W1 and the third flow channel width W3 is: 1≤b≤3. Among them, the ratio b should not be too large, otherwise the first flow channel width W1 is much larger than the third flow channel width W3, so that the flow resistance of the heat exchange medium when flowing to the flow channel 5 in the third side area 23 is too large, which will seriously affect the heat exchange medium from the first side area 21 and the second bottom area 22 into the third side area 23, affecting the overall heat exchange effect of the battery pack 1; and 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 area 21 and the second bottom area 22 enters the third side area 23 and is difficult to fill the flow channel 5 in the third side area 23, so that the heat exchange area between the heat exchange medium and the battery pack 1 is insufficient, affecting the heat exchange effect of the side 12 corresponding to the battery pack 1 and the third side area 23.

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

Optionally, as shown in FIG. 1 , FIG. 3 and FIG. 4 , the blocking structure 6 is a blocking strip, and the blocking strip is connected to the end of the heat exchange channel by welding.

In this embodiment, the heat exchange plate 2 is a profile structure, a portion of the end of the heat exchange plate 2 is removed, and the cavity in the heat exchange plate 2 is exposed, and the remaining portion of the end of the heat exchange plate 2 can be connected to the end plate 7 by riveting or welding, etc.; wherein, the end plate 7 can be used as a partial structure of a container for carrying the battery pack 1. The cavity in the heat exchange plate 2 can be used as a flow channel 5, and the portion of the cavity exposed at the end of the heat exchange plate 2 can be blocked by a blocking structure 6; it should be understood that since the multiple flow channels 5 in this embodiment are connected end to end, there is a flow channel at the end-to-end connection of two adjacent flow channels 5, and the blocking structure 6 will not block the flow channel after being connected to the heat exchange plate 2.

The present embodiment discloses a battery device, which includes a battery pack 1 and a heat exchange plate 2, wherein the heat exchange plate 2 is U-shaped and performs heat exchange for three surfaces of the battery pack 1, thereby improving the heat exchange efficiency and ensuring the heat exchange balance on both sides of the battery pack 1; in addition, the inlet 3 and the outlet 4 are arranged on the portion of the heat exchange plate 2 corresponding to the two opposite side surfaces 12 of the battery pack 1, and under the action of the gravity of the heat exchange medium and the pressure applied to the heat exchange medium to make the heat exchange medium flow, the heat exchange medium at the inlet 3 has a low temperature and a fast flow rate, and the heat exchange medium at the outlet 4 has a high temperature and a slow flow rate, which can further effectively balance the heat exchange effect on both sides of the battery pack 1.

The above shows and describes the basic principles and main features of the present application and the advantages of the present application. For those skilled in the art, it is obvious that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or basic features of the present application. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present application is defined by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims (10)

1. A battery device, comprising: A battery pack, the battery pack having a bottom surface and two side surfaces connected to the bottom surface and arranged opposite to each other; and a heat exchange plate, the heat exchange plate at least partially covering the bottom surface and the two 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 arranged on one side of the battery pack, the second bottom region is arranged on the bottom surface of the battery pack, and the third side region is arranged on the other side of the battery pack; The first side region is provided with an inlet; The third side area is provided with an outlet; A heat exchange channel is provided inside the heat exchange plate, and the heat exchange channel is connected with the inlet and the outlet; A heat exchange medium is arranged inside the heat exchange channel, and the heat exchange medium flows through the inlet, the first side area, the second bottom area, the third side area and the outlet in sequence. 2 . The battery device according to claim 1 , wherein the orthographic projections of the inlet and the outlet on the same side surface of the battery pack coincide with each other. 3. The battery device according to claim 1, wherein the battery pack comprises a plurality of battery columns, and when there are a plurality of battery columns, the arrangement direction of the plurality of battery columns is set to be a first direction; The first side area and the third side area are respectively arranged on two side surfaces of the battery pack along the first direction; The battery row includes a plurality of battery cells arranged in sequence, and the arrangement direction of the plurality of battery cells is assumed to be a second direction, and the second direction is perpendicular to the first direction; Assume that the outermost battery cell in the same battery column along the second direction is the outermost battery cell; The inlet and the outlet are respectively disposed on both sides of the outermost battery cell along the first direction. 4 . The battery device according to claim 1 , wherein the inlet is arranged at the beginning of the heat exchange channel, and/or the outlet is arranged at the end of the heat exchange channel. 5. The battery device according to any one of claims 1 to 4, characterized in that the heat exchange channel comprises a plurality of flow channels arranged side by side and connected end to end in sequence; The extension 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, characterized in that the width of the flow channel in the first side region along the third direction is set as the first flow channel width; The third direction is an arrangement direction of the flow channels in the first side regions, and the third direction is parallel to a side of the battery pack where the first side regions are disposed; Assume that the width of the flow channel in the second bottom area along the fourth direction is the second flow channel width; Wherein, the fourth direction is the arrangement direction of the plurality of flow channels in the second bottom area, and the fourth direction is parallel to the bottom surface of the battery pack; The first flow channel width is greater than the second flow channel width. 7 . The battery device according to claim 6 , wherein a ratio a of the first flow channel width to the second flow channel width is in the range of 1<a≤3. 8. The battery device according to claim 6, characterized in that the width of the flow channel in the third side region along the fifth direction is set as the third flow channel width; The fifth direction is an arrangement direction of the flow channels in the third side regions, and the fifth direction is parallel to a side surface of the battery pack where the third side regions are disposed; The third flow channel width is consistent with the first flow channel width, or the third flow channel width is smaller than the first flow channel width. 9 . The battery device according to claim 8 , wherein a ratio b of the first flow channel width to the third flow channel width is in the range of 1≤b≤3. 10. The battery device according to claim 1, characterized in that the heat exchange plate is made by profile extrusion molding, and blocking structures are provided at both ends of the heat exchange channel.