Battery module and electric equipment

Abstract

The utility model relates to the technical field of batteries, and discloses a battery module and electric equipment, and the battery module comprises a battery cell group which is formed by stacking a plurality of battery cells; the first heat exchange plate and the second heat exchange plate are jointly enclosed to form a heat exchange plate group surrounding the peripheral side of the battery cell group; the heat exchange plate group is at least propped against the end parts of the two sides of the battery cell group along the stacking direction so as to restrain the battery cells in the battery cell group from falling off along the stacking direction. According to the battery module provided by the utility model, after the battery cell group and the heat exchange plate group are assembled, the heat exchange plate group can be used as the module shell to restrain and fix the battery cell group, the structure is simple, structures such as end plates, side plates and the like do not need to be additionally arranged as the module shell, the types of materials are few, the module welding procedure is cancelled, and the module manufacturing cost is reduced. Meanwhile, the energy density of the battery can be increased.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery module and electrical equipment. Background Art

[0002] With the continuous development of power battery fast charging technology, in order to meet the heat dissipation needs of batteries, double-sided or multi-sided cooling thermal management methods are usually required. However, when the battery cell group is fixed into groups, additional end plates, side plates and other structures are required as the module shell. If it is matched with an independent heat exchange plate, not only will there be many assembly processes and material types, but it will also increase the weight of the battery module and reduce the energy density. Utility Model Content

[0003] In view of this, the utility model provides a battery module and electrical equipment to solve the problem that the end plates, side plates and other structures of the battery module are independently arranged from the heat exchange plates, resulting in many assembly processes and low energy density.

[0004] In a first aspect, the utility model provides a battery module, comprising:

[0005] A battery pack is composed of a number of stacked batteries;

[0006] The first heat exchange plate and the second heat exchange plate are together enclosed to form a heat exchange plate group surrounding the outer periphery of the battery cell group;

[0007] The heat exchange plate group at least abuts against the ends of the battery cell group on both sides along the stacking direction to restrict the battery cells in the battery cell group from falling out along the stacking direction.

[0008] Beneficial effect: The battery module provided by the embodiment of the utility model is provided with a first heat exchange plate and a second heat exchange plate, and together they enclose a heat exchange plate group surrounding the outer peripheral side of the battery cell group; and the heat exchange plate group at least abuts against the ends of the battery cell group on both sides along the stacking direction to restrict the battery cells in the battery cell group from escaping along the stacking direction. Therefore, after the battery cell group and the heat exchange plate group are assembled, the heat exchange plate group can be used as a module shell to restrain and fix the battery cell group. The structure is simple, and there is no need to additionally set up end plates, side plates and other structures as module shells. There are fewer types of materials, and the module welding process is eliminated, which reduces the module manufacturing cost. At the same time, it can increase the energy density of the battery.

[0009] In an optional embodiment, the first heat exchange plate and the second heat exchange plate are connected end to end to jointly enclose the outer peripheral side of the battery cell group.

[0010] Beneficial effect: The first heat exchange plate and the second heat exchange plate are connected end to end and surround the battery cell group together for one circle, so as to jointly enclose the outer periphery of the battery cell group. By connecting the first heat exchange plate and the second heat exchange plate end to end and surrounding the battery cell group together for one circle, the heat exchange efficiency can be guaranteed and the battery cells in the battery cell group can be well restrained.

[0011] In an optional embodiment, the first heat exchange plate includes: a first main body portion, which is in contact with the surface of the battery cell group to be cooled; a first connecting portion, which is directly or indirectly connected to the first main body portion and is suitable for connecting to the second heat exchange plate;

[0012] The second heat exchange plate includes: a second main body portion, which is arranged on a side of the battery cell group opposite to the first main body portion and is in contact with the surface to be cooled of the battery cell group; a second connecting portion, which is directly or indirectly connected to the second main body portion and is suitable for connecting to the first heat exchange plate;

[0013] The first heat exchange plate further includes: a first end plate portion abutting against at least one end of the cell group along the stacking direction; and / or the second heat exchange plate further includes: a second end plate portion abutting against at least one end of the cell group along the stacking direction.

[0014] In an optional embodiment, the first heat exchange plate includes a first end plate portion, which is arranged between the first main body portion and the first connecting portion; the second heat exchange plate includes a second end plate portion, which is arranged between the second main body portion and the second connecting portion, and the first connecting portion is in contact with the second connecting portion.

[0015] Beneficial effect: By fitting the first joint portion with the second joint portion and connecting them by welding or the like, the first heat exchange plate and the second heat exchange plate can be assembled to ensure that the two are securely fixed.

[0016] In an optional embodiment, the first joint portion is connected to a pipe joint, and the second joint portion is also connected to a pipe joint;

[0017] The first combining part is arranged relatively above the second combining part. The first combining part is provided with a through hole. The pipe joint of the second combining part passes through the through hole and is arranged side by side with the pipe joint of the first combining part.

[0018] Beneficial effect: In order to facilitate the installation of the pipes of the battery module after installation, by extending the pipe joints on the first heat exchange plate and the second heat exchange plate in the same direction, it is convenient to install the external quick-insert pipes and save layout space. In addition, by opening a through hole in the first joint and passing the pipe joint of the second joint through the through hole, it can play a role of pre-positioning in the early stage of assembly, which is convenient for the subsequent welding and fixing of the first heat exchange plate and the second heat exchange plate.

[0019] In an optional embodiment, the first heat exchange plate includes at least two plate bodies arranged side by side and attached to the same outer surface of the battery cell group;

[0020] And / or, the second heat exchange plate includes at least two plate bodies arranged side by side and in contact with the same outer surface of the battery cell group.

[0021] Beneficial effect: By dividing the heat exchange plate into multiple sections along the width direction of the battery cell group, the heat exchange medium in each section of the plate can flow independently. By changing the flow rate of different plates, the cooling power of different plates can be controlled to achieve the purpose of local temperature difference regulation.

[0022] In an optional embodiment, a pole is arranged on at least one side end face of the battery cell, and the first heat exchange plate includes a first heat exchange plate side plate arranged close to the pole, and a first heat exchange plate middle plate arranged away from the pole; and / or, the second heat exchange plate includes a second heat exchange plate side plate arranged close to the pole, and a second heat exchange plate middle plate arranged away from the pole.

[0023] Beneficial effect: Since the temperature near the pole is usually higher when the battery cell is charging and discharging, the segmented cold plate structure and the increase in the flow of the plate body close to the pole position can be used to perform additional cooling adjustments in the area with higher heat generation to ensure that the temperature of the entire battery cell group is in a balanced state.

[0024] In an optional embodiment, poles are provided on both side end surfaces of the battery cell along the length direction, the first heat exchange plate includes two first heat exchange plate side plates, the two first heat exchange plate side plates are respectively arranged close to the poles on the two side end surfaces of the battery cell, and the first heat exchange plate middle plate is arranged in the area between the two first heat exchange plate side plates;

[0025] The second heat exchange plate includes two second heat exchange plate side plates, which are respectively arranged close to the poles on the end surfaces of both sides of the battery core, and the second heat exchange plate middle plate is arranged in the area between the two second heat exchange plate side plates.

[0026] In an optional embodiment, the first heat exchange plate includes a first end plate portion, and the second heat exchange plate includes a second end plate portion; a buffer is provided between the first end plate portion and the end of at least one side of the battery cell group along the stacking direction; a buffer is provided between the second end plate portion and the end of at least one side of the battery cell group along the stacking direction;

[0027] The first heat exchange plate includes a first main body, and the second heat exchange plate includes a second main body; a heat conductive medium is filled between the surfaces where the first main body and the battery cell group are in contact, and a heat conductive medium is filled between the surfaces where the second main body and the battery cell group are in contact.

[0028] Beneficial effects: By providing a buffer, the collision of the battery cells at the end can be reduced, ensuring safe use. By filling a heat-conducting medium, good contact between the heat exchange plate group and the surface of the battery cell group can be ensured, improving the heat dissipation efficiency.

[0029] In a second aspect, the utility model further provides an electrical device, including: a battery module as described above.

[0030] Since the electrical equipment includes a battery module and has the same effect as the battery module, it will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 A schematic diagram of a battery module of the utility model;

[0033] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0034] Figure 3 This is an exploded schematic diagram of the battery module of the utility model;

[0035] Figure 4 This is a schematic diagram of the cooperation of a group of first heat exchange plates and a second heat exchange plate of the utility model;

[0036] Figure 5 for Figure 4 Enlarged view of point B.

[0037] Description of reference numerals:

[0038] 1. Battery cell group; 10. Battery cell; 11. Pole; 4. Pipe joint; 5. Via hole; 6. Heat exchange plate group;

[0039] 2. first heat exchange plate; 21. first main body; 22. first end plate; 23. first joint;

[0040] 3. second heat exchange plate; 31. second main body; 32. second end plate; 33. second joint;

[0041] 201, side plate of the first heat exchange plate; 202, middle plate of the first heat exchange plate;

[0042] 301, side plate of the second heat exchange plate; 302, middle plate of the second heat exchange plate. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0044] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0045] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0047] Combine the following Figures 1 to 5 , describing an embodiment of the utility model.

[0048] According to an embodiment of the present utility model, on the one hand, a battery module is provided, comprising:

[0049] A battery cell group 1 is formed by stacking a plurality of battery cells 10;

[0050] The first heat exchange plate 2 and the second heat exchange plate 3 together form a heat exchange plate group 6 surrounding the outer periphery of the battery cell group 1;

[0051] The heat exchange plate group 6 at least abuts against the ends of the battery cell group 1 on both sides along the stacking direction, so as to restrict the battery cells 10 in the battery cell group 1 from falling out along the stacking direction.

[0052] The battery cell group 1 is formed by stacking a number of battery cells 10, wherein the battery cell 10 can be a square shell battery cell, a blade battery cell or a short blade battery cell. In the present embodiment, taking the battery cell 10 as an example of a blade battery cell, the battery cell 10 includes six outer wall surfaces, and every two outer wall surfaces are correspondingly arranged and jointly enclosed to form the battery cell 10, wherein the two wall surfaces with the largest area are defined as the large faces of the battery cell. In the present embodiment, the stacking direction of the battery cell 10 is perpendicular to the large faces of the battery cell. The battery cell 10 also includes a long side surface and a short side surface. In the present embodiment, the long sides of a plurality of battery cells 10 are arranged side by side to jointly form the top and bottom surfaces of the battery cell group 1; the short sides of a plurality of battery cells 10 are arranged side by side to jointly form the side surfaces in the width direction of the battery cell group 1. Among them, the pole 11 can be arranged on the short side surface of the battery cell 10, and specifically, the positive pole and the negative pole are respectively arranged on the short sides on both sides of the battery cell 10.

[0053] The first heat exchange plate 2 and the second heat exchange plate 3 are jointly enclosed to form a heat exchange plate group 6 surrounding the outer peripheral side of the battery cell group 1. The heat exchange plate group 6 is in contact with the battery cell group 1 to perform a heat exchange function of heating or cooling. At the same time, the heat exchange plate group 6 can restrain the battery cell 10 by surrounding the outer peripheral side of the battery cell group 1, thereby facilitating the formation of the battery cell group 1 and eliminating the end plate, side plate and other structures in the related technology as the module shell.

[0054] In this embodiment, the first heat exchange plate 2 is in contact with the top surface of the battery cell group 1 , and the second heat exchange plate 3 is in contact with the bottom surface of the battery cell group 1 .

[0055] In addition, the heat exchange plate group 6 at least abuts against the ends of the battery cell group 1 on both sides along the stacking direction, so as to restrict the battery cells 10 in the battery cell group 1 from falling out along the stacking direction.

[0056] The battery module provided by the embodiment of the utility model is provided with a first heat exchange plate 2 and a second heat exchange plate 3, and together encloses a heat exchange plate group 6 surrounding the outer peripheral side of the battery cell group 1; and the heat exchange plate group 6 at least abuts against the ends of the battery cell group 1 on both sides along the stacking direction to restrict the battery cells 10 in the battery cell group 1 from escaping along the stacking direction. Therefore, after the battery cell group 1 and the heat exchange plate group 6 are assembled, the heat exchange plate group 6 can be used as a module shell to constrain and fix the battery cell group 1. The structure is simple, and there is no need to additionally set up end plates, side plates and other structures as module shells. There are fewer types of materials, and the module welding process is eliminated, which reduces the module manufacturing cost. At the same time, it can increase the energy density of the battery.

[0057] In some embodiments, in combination Figure 1 As shown, the first heat exchange plate 2 and the second heat exchange plate 3 are connected end to end to enclose the outer periphery of the battery cell group 1 together.

[0058] The first heat exchange plate 2 and the second heat exchange plate 3 are connected end to end and surround the battery cell group 1 for one circle, so as to be jointly enclosed on the outer peripheral side of the battery cell group 1. By connecting the first heat exchange plate 2 and the second heat exchange plate 3 end to end and surrounding the battery cell group 1 for one circle, the heat exchange efficiency can be guaranteed and the battery cells 10 in the battery cell group 1 can be well constrained.

[0059] In some embodiments, in combination Figure 2 As shown, the first heat exchange plate 2 includes: a first main body 21, which is in contact with the surface to be cooled of the battery cell group 1; a first connecting portion 23, which is directly or indirectly connected to the first main body 21 and is suitable for connecting to the second heat exchange plate 3;

[0060] The second heat exchange plate 3 includes: a second main body 31, which is arranged on the side of the battery cell group 1 opposite to the first main body 21 and is in contact with the surface to be cooled of the battery cell group 1; a second connecting portion 33, which is directly or indirectly connected to the second main body 31 and is suitable for connecting with the first heat exchange plate 2;

[0061] The first heat exchange plate 2 further includes: a first end plate portion 22, abutting against the end of at least one side of the battery cell group 1 along the stacking direction; and / or the second heat exchange plate 3 further includes: a second end plate portion 32, abutting against the end of at least one side of the battery cell group 1 along the stacking direction.

[0062] In this embodiment, the first heat exchange plate 2 includes: a first end plate portion 22, which abuts against the ends of the battery cell group 1 on both sides along the stacking direction; a first main body portion 21, which is connected to the first end plate portions 22 on both sides; a first joint portion 23, which is connected to the first end plate portion 22 and is suitable for connecting with the second joint portion 33 of the second heat exchange plate 3. At the same time, the second heat exchange plate 3 includes: a second end plate portion 32, which abuts against the ends of the battery cell group 1 on both sides along the stacking direction; a second main body portion 31, which is connected to the second end plate portions 32 on both sides; a second joint portion 33, which is connected to the second end plate portion 32 and is suitable for connecting with the first joint portion 23 of the first heat exchange plate 2.

[0063] As a variation, the first main body portion 21 of the first heat exchange plate 2 is directly connected to the first connecting portion 23, and the second main body portion 31 of the second heat exchange plate 3 is connected to the second connecting portion 33 via the second end plate portion 32. At this time, the first heat exchange plate 2 is overall constructed in a flat plate shape, and the second heat exchange plate 3 is overall constructed in a U-shaped structure, and the second end plate portion 32 of the second heat exchange plate 3 matches the height of the battery cell group 1.

[0064] As a variation, the second main body portion 31 of the second heat exchange plate 3 is directly connected to the second connecting portion 33, and the first main body portion 21 of the first heat exchange plate 2 is connected to the first connecting portion 23 via the first end plate portion 22. At this time, the second heat exchange plate 3 is overall constructed in a flat plate shape, and the first heat exchange plate 2 is overall constructed in a U-shaped structure, and the first end plate portion 22 of the first heat exchange plate 2 matches the height of the battery cell group 1.

[0065] The first end plate portion 22 and the second end plate portion 32 have the same height to evenly divide the height direction of the battery cell group 1 .

[0066] Optionally, the first heat exchange plate 2 and the second heat exchange plate 3 have the same appearance and can share a mold for batch production, thereby reducing development costs.

[0067] In this embodiment, the first heat exchange plate 2 and the second heat exchange plate 3 are both processed by a process of bending after extrusion.

[0068] In some embodiments, in combination Figure 2 As shown, the first heat exchange plate 2 includes a first end plate portion 22, which is arranged between the first main body portion 21 and the first connecting portion 23; the second heat exchange plate 3 includes a second end plate portion 32, which is arranged between the second main body portion 31 and the second connecting portion 33, and the first connecting portion 23 and the second connecting portion 33 are in contact with each other.

[0069] By fitting the first combining portion 23 and the second combining portion 33 together and connecting them by welding or the like, the first heat exchange plate 2 and the second heat exchange plate 3 can be assembled to ensure that the two are securely fixed.

[0070] In some embodiments, in combination Figure 5 As shown, the first joint portion 23 is connected to the pipe joint 4, and the second joint portion 33 is also connected to the pipe joint 4;

[0071] The first connecting portion 23 is disposed relatively above the second connecting portion 33 . The first connecting portion 23 is provided with a through hole 5 . The pipe joint 4 of the second connecting portion 33 passes through the through hole 5 and is disposed side by side with the pipe joint 4 of the first connecting portion 23 .

[0072] In order to facilitate the installation of the pipelines of the battery module after installation, by extending the pipe joints 4 on the first heat exchange plate 2 and the second heat exchange plate 3 in the same direction, the installation of external quick-insert pipelines can be facilitated, saving layout space.

[0073] In addition, by opening a through hole 5 in the first joint portion 23 and passing the pipe joint 4 of the second joint portion 33 through the through hole 5, a pre-positioning function can be achieved in the early stage of assembly, facilitating subsequent welding and fixing of the first heat exchange plate 2 and the second heat exchange plate 3.

[0074] In some embodiments, in combination Figure 1 , Figure 3 As shown, the first heat exchange plate 2 includes at least two plates arranged side by side and attached to the same outer surface of the battery cell group 1;

[0075] And / or, the second heat exchange plate 3 includes at least two plate bodies which are arranged side by side and are in contact with the same outer surface of the battery cell group 1 .

[0076] In this embodiment, the first heat exchange plate 2 includes at least two plates arranged side by side along the width direction of the battery cell group 1 , and the second heat exchange plate 3 includes at least two plates arranged side by side along the width direction of the battery cell group 1 .

[0077] By dividing the heat exchange plate into multiple sections along the width direction of the battery cell group 1, the heat exchange medium in each section of the plate can flow independently, and the cooling power of different plates can be controlled by changing the flow rate of different plates to achieve the purpose of local temperature difference regulation.

[0078] In some embodiments, in combination Figure 3 As shown, a pole 11 is arranged on at least one side end face of the battery cell 10, and the first heat exchange plate 2 includes a first heat exchange plate side plate 201 arranged close to the pole 11, and a first heat exchange plate middle plate 202 arranged away from the pole 11; and / or, the second heat exchange plate 3 includes a second heat exchange plate side plate 301 arranged close to the pole 11, and a second heat exchange plate middle plate 302 arranged away from the pole 11.

[0079] In some embodiments, in combination Figure 3 As shown, poles 11 are arranged on both side end surfaces of the battery cell 10 along the length direction, the first heat exchange plate 2 includes two first heat exchange plate side plates 201, the two first heat exchange plate side plates 201 are respectively arranged close to the poles 11 on both side end surfaces of the battery cell 10, and the first heat exchange plate middle plate 202 is arranged in the area between the two first heat exchange plate side plates 201;

[0080] The second heat exchange plate 3 includes two second heat exchange plate side plates 301 , which are respectively arranged close to the poles 11 on the two side end surfaces of the battery cell 10 , and the second heat exchange plate middle plate 302 is arranged in the area between the two second heat exchange plate side plates 301 .

[0081] Since the temperature near the pole is usually higher when the battery cell is charging and discharging, the segmented cold plate structure and the flow of the plate body close to the pole 11 can be used to perform additional cooling adjustment on the area with higher heat generation to ensure that the temperature of the entire battery cell group 1 is in a balanced state.

[0082] In some embodiments, the first heat exchange plate 2 includes a first end plate portion 22, and the second heat exchange plate 3 includes a second end plate portion 32; a buffer is provided between the first end plate portion 22 and the end of at least one side of the battery cell group 1 along the stacking direction; a buffer is provided between the second end plate portion 32 and the end of at least one side of the battery cell group 1 along the stacking direction; by providing the buffer, the collision with the end battery cell 10 can be reduced to ensure safe use.

[0083] In this embodiment, the buffer may be foam or rubber.

[0084] The first heat exchange plate 2 includes a first main body 21, and the second heat exchange plate 3 includes a second main body 31; a heat-conducting medium is filled between the surface where the first main body 21 and the battery cell group 1 are in contact, and a heat-conducting medium is filled between the surface where the second main body 31 and the battery cell group 1 are in contact. By filling the heat-conducting medium, good contact between the heat exchange plate group 6 and the surface of the battery cell group 1 can be ensured, thereby improving the heat dissipation efficiency.

[0085] According to an embodiment of the present invention, on the other hand, an electrical device is provided, including: the battery module as described above.

[0086] Obviously, the above embodiments are only examples for clear explanation, and are not intended to limit the implementation methods. Although the embodiments of the present utility model are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present utility model, and such modifications and variations are all within the scope defined by the present utility model.

Claims

1. A battery module, characterized in that: include: A battery cell group (1) is formed by stacking a plurality of battery cells (10); The first heat exchange plate (2) and the second heat exchange plate (3) are together formed to form a heat exchange plate group (6) surrounding the outer peripheral side of the battery cell group (1); The heat exchange plate group (6) at least abuts against the ends of the battery cell group (1) on both sides along the stacking direction, so as to restrict the battery cells (10) in the battery cell group (1) from falling out along the stacking direction; The first heat exchange plate (2) and the second heat exchange plate (3) are connected end to end so as to jointly enclose the outer peripheral side of the battery cell group (1).

2. The battery module according to claim 1, characterized in that: The first heat exchange plate (2) comprises: a first main body (21) which is in contact with the surface to be cooled of the battery cell group (1); a first connecting portion (23) which is directly or indirectly connected to the first main body (21) and is suitable for connecting to the second heat exchange plate (3); The second heat exchange plate (3) comprises: a second main body (31), which is arranged on a side of the battery cell group (1) opposite to the first main body (21) and is in contact with the surface to be cooled of the battery cell group (1); a second connecting portion (33), which is directly or indirectly connected to the second main body (31) and is suitable for connecting to the first heat exchange plate (2); The first heat exchange plate (2) further comprises: a first end plate portion (22), abutting against the end of at least one side of the battery cell group (1) along the stacking direction; and / or the second heat exchange plate (3) further comprises: a second end plate portion (32), abutting against the end of at least one side of the battery cell group (1) along the stacking direction.

3. The battery module according to claim 2, characterized in that: The first heat exchange plate (2) comprises a first end plate portion (22), and the first end plate portion (22) is arranged between the first main body portion (21) and the first connecting portion (23); the second heat exchange plate (3) comprises a second end plate portion (32), and the second end plate portion (32) is arranged between the second main body portion (31) and the second connecting portion (33), and the first connecting portion (23) and the second connecting portion (33) are in contact with each other.

4. The battery module according to claim 3, characterized in that: The first joint portion (23) is connected to a pipe joint (4), and the second joint portion (33) is also connected to a pipe joint (4); The first combining portion (23) is arranged relatively above the second combining portion (33); the first combining portion (23) is provided with a through hole (5); the pipe joint (4) of the second combining portion (33) passes through the through hole (5) and is arranged side by side with the pipe joint (4) of the first combining portion (23).

5. The battery module according to any one of claims 1 to 4, characterized in that: The first heat exchange plate (2) comprises at least two plate bodies arranged side by side and in contact with the same outer surface of the battery cell group (1); And / or, the second heat exchange plate (3) comprises at least two plate bodies which are arranged side by side and are in contact with the same outer surface of the battery cell group (1).

6. The battery module according to claim 5, characterized in that: A pole (11) is arranged on at least one side end surface of the battery cell (10); the first heat exchange plate (2) comprises a first heat exchange plate side plate (201) arranged close to the pole (11), and a first heat exchange plate middle plate (202) arranged away from the pole (11); and / or the second heat exchange plate (3) comprises a second heat exchange plate side plate (301) arranged close to the pole (11), and a second heat exchange plate middle plate (302) arranged away from the pole (11).

7. The battery module according to claim 6, characterized in that: The poles (11) are arranged on both side end surfaces of the battery cell (10) along the length direction, the first heat exchange plate (2) comprises two first heat exchange plate side plates (201), the two first heat exchange plate side plates (201) are respectively arranged close to the poles (11) on both side end surfaces of the battery cell (10), and the first heat exchange plate middle plate (202) is arranged in the area between the two first heat exchange plate side plates (201); The second heat exchange plate (3) comprises two second heat exchange plate side plates (301), the two second heat exchange plate side plates (301) being respectively arranged close to the poles (11) on the end surfaces of both sides of the battery cell (10), and the second heat exchange plate middle plate (302) being arranged in the area between the two second heat exchange plate side plates (301).

8. The battery module according to any one of claims 2 to 4, characterized in that: The first heat exchange plate (2) comprises a first end plate portion (22), and the second heat exchange plate (3) comprises a second end plate portion (32); a buffer is provided between the first end plate portion (22) and the end portion of at least one side of the battery cell group (1) along the stacking direction; and a buffer is provided between the second end plate portion (32) and the end portion of at least one side of the battery cell group (1) along the stacking direction; The first heat exchange plate (2) comprises a first main body (21), and the second heat exchange plate (3) comprises a second main body (31); a heat-conducting medium is filled between the surfaces where the first main body (21) and the battery cell group (1) are in contact, and a heat-conducting medium is filled between the surfaces where the second main body (31) and the battery cell group (1) are in contact.

9. An electrical device, characterized in that: A battery module comprising any one of claims 1 to 8.

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