Cold plate, battery and electric device

Abstract

The utility model discloses a cold plate, a battery and an electric device, the cold plate is used for the battery, the battery comprises a battery monomer, at least one side of the battery monomer is provided with the cold plate, the cold plate comprises a first plate body, a second plate body and a first elastic piece, the first plate body is connected with the second plate body, and a liquid cooling flow channel is arranged between the first plate body and the second plate body; the first elastic piece is located in the liquid cooling flow channel and is supported between the first plate body and the second plate body. According to the cold plate disclosed by the utility model, the cold plate comprises the first plate body and the second plate body which are connected, and the first elastic piece supported between the first plate body and the second plate body, so that the cold plate can be used for effectively cooling a battery and reducing the temperature of the battery; and the cold plate can also be supported on at least one side of the battery monomer, so that a compression space can be provided for the expansion of the battery monomer, the excessive expansion of the battery monomer can be avoided, and the service life of the battery is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a cold plate, a battery and an electric device. Background Art

[0002] In the related art, during the charging and discharging process of a battery, the battery will gradually expand. In the initial stage of battery use, appropriate expansion force is beneficial to the chemical reaction of the battery and the release of performance. However, as the service life increases, the expansion force also increases. Excessive expansion force will cause local aging, heating or lithium plating of the battery, thereby reducing the battery life. Summary of the Utility Model

[0003] The utility model aims to at least solve one of the technical problems existing in the prior art. For this reason, an object of the utility model is to provide a cold plate which can effectively cool the battery, reduce the temperature of the battery, provide a compression space for the expansion of the battery cell, avoid excessive expansion of the battery cell, and improve the service life of the battery.

[0004] The utility model also provides a battery with the above cold plate.

[0005] The utility model also provides an electric device with the above battery. According to the cold plate of the first aspect embodiment of the utility model, which is used for a battery, the battery includes a battery cell, and the cold plate is provided on at least one side of the battery cell. The cold plate includes: a first plate body; a second plate body, the first plate body and the second plate body are connected, and a liquid cooling flow channel is arranged between the first plate body and the second plate body; a first elastic member, the first elastic member is located in the liquid cooling flow channel, and the first elastic member is supported between the first plate body and the second plate body.

[0006] According to the cold plate of the embodiment of the utility model, the cold plate includes a connected first plate body and second plate body and a first elastic member supported between the first plate body and the second plate body. The cold plate can effectively cool the battery and reduce the temperature of the battery. The cold plate can also be supported on at least one side of the battery cell, which can provide a compression space for the expansion of the battery cell, avoid excessive expansion of the battery cell, and improve the service life of the battery.

[0007] According to some embodiments of the utility model, the first elastic member includes a plurality of elastic units spaced apart in a first direction and a connecting plate connecting two adjacent elastic units, and the elastic unit abuts against the first plate body and / or the second plate body.

[0008] According to some embodiments of the utility model, the elastic unit includes a honeycomb-shaped elastic unit, and a cavity extending in a second direction is formed in the elastic unit, and the second direction is perpendicular to the first direction.

[0009] According to some embodiments of the present utility model, the cold plate further includes a second elastic member, the second elastic member is located in the liquid cooling flow channel, and is spaced apart from the first elastic member along a first direction.

[0010] According to some embodiments of the present utility model, the cold plate further includes a first end plate and a second end plate connected to two ends of the first plate body in the first direction, and a third end plate and a fourth end plate connected to two ends of the second plate body in the first direction. Wherein, the second elastic member has a mounting portion, and the mounting portion is clamped between the first end plate and the third end plate, or the mounting portion is clamped between the second end plate and the fourth end plate.

[0011] According to some embodiments of the present utility model, the second elastic member includes an arc-shaped plate and the mounting portion connected to one end of the arc-shaped plate. The other end of the arc-shaped plate is a free end. A limiting plate is arranged in the liquid cooling flow channel, and the limiting plate is spaced apart from both the free end and the first elastic member. The limiting plate restricts the deformation amount of the arc-shaped plate by restricting the movement range of the free end. Wherein, the limiting plate is located on the first plate body or the second plate body.

[0012] According to some embodiments of the present utility model, the mounting portion includes a first folding plate, and a second folding plate and a third folding plate connected to two ends of the first folding plate in the first direction. The second folding plate and the third folding plate are arranged in parallel to form a limiting groove between the first folding plate, the second folding plate and the third folding plate. Wherein, the first end plate is inserted into the limiting groove, or the fourth end plate is inserted into the limiting groove.

[0013] According to some embodiments of the present utility model, the first end plate is inserted into the limiting groove, the arc-shaped plate protrudes towards the second plate body and is spaced apart from the second plate body in a third direction; or, the fourth end plate is inserted into the limiting groove, the arc-shaped plate protrudes towards the first plate body and is spaced apart from the first plate body in a third direction.

[0014] According to some embodiments of the present utility model, the first end plate is inserted into the limiting groove, and both sides of the second folding plate in the first direction are respectively in contact with the third end plate and the first end plate; or, the fourth end plate is inserted into the limiting groove, and both sides of the second folding plate in the first direction are respectively in contact with the fourth end plate and the second end plate.

[0015] According to some embodiments of the present utility model, the installation part further includes a fourth folding plate connected between the third folding plate and the arc-shaped plate. The first end plate is inserted into the limit groove, and the fourth folding plate abuts against the first plate body; alternatively, the fourth end plate is inserted into the limit groove, and the fourth folding plate abuts against the second plate body.

[0016] According to some embodiments of the present utility model, the first end plate is inserted into the limit groove, the minimum distance between the arc-shaped plate and the second plate body in the third direction is H, and the distance between the first folding plate and the second plate body in the third direction is h; alternatively, the fourth end plate is inserted into the limit groove, the minimum distance between the arc-shaped plate and the first plate body in the third direction is H, and the distance between the first folding plate and the first plate body in the third direction is h; satisfying: 0 < h ≤ H.

[0017] The battery according to the second aspect embodiment of the present utility model includes: the cold plate according to the first aspect embodiment of the present utility model above.

[0018] The battery according to the embodiment of the present utility model can effectively cool the battery, reduce the temperature of the battery by setting the above-mentioned cold plate; and can also provide a compression space for the expansion of the battery cell, and can also avoid excessive expansion of the battery cell, improving the service life of the battery.

[0019] The electrical device according to the third aspect embodiment of the present utility model includes: the battery according to the second aspect embodiment of the present utility model above.

[0020] The electrical device according to the embodiment of the present utility model can effectively cool the battery, reduce the temperature of the battery by setting the above-mentioned battery; and can also provide a compression space for the expansion of the battery cell, and can also avoid excessive expansion of the battery cell, improving the service life of the battery, and further improving the usage time of the electrical device.

[0021] The additional aspects and advantages of the present utility model will be partially given in the following description, partially will become obvious from the following description, or will be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present utility model will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0023] Figure 1 is a schematic diagram of a battery according to some embodiments of the present utility model;

[0024] Figure 2 is a side view of a battery according to some embodiments of the present utility model;

[0025] Figure 3 Schematic diagram of the cooperation between a cold plate and a battery cell according to some embodiments of the present utility model;

[0026] Figure 4 Schematic diagram of the cooperation between a cold plate and a battery cell according to other embodiments of the present utility model;

[0027] Figure 5 Schematic diagram of a cold plate according to some embodiments of the present utility model;

[0028] Figure 6 Partial schematic diagram of a cold plate according to some embodiments of the present utility model;

[0029] Figure 7 Schematic diagram of another part of a cold plate according to some embodiments of the present utility model;

[0030] Figure 8 Schematic diagram of the cooperation between a first plate body, a second plate body and a first elastic member according to some embodiments of the present utility model;

[0031] Figure 9 Schematic diagram of a first elastic member according to some embodiments of the present utility model;

[0032] Figure 10 Schematic diagram of a second elastic member according to some embodiments of the present utility model;

[0033] Figure 11 Schematic diagram of a second plate body according to some embodiments of the present utility model.

[0034] Reference numerals:

[0035] 100. Battery; 101. Battery cell;

[0036] 10. Cold plate;

[0037] 11. First plate body; 12. First end plate; 13. Second end plate;

[0038] 21. Second plate body; 22. Third end plate; 23. Fourth end plate;

[0039] 3. Liquid cooling channel; 31. Limiting plate;

[0040] 4. First elastic member; 41. Elastic unit; 411. Cavity; 412. Side plate; 42. Connecting plate;

[0041] 5. Second elastic member; 51. Arc plate; 511. Free end; 52. Mounting portion; 521. First folding plate; 522. Second folding plate; 523. Third folding plate; 524. Fourth folding plate; 525. Limiting groove. Detailed implementation manners

[0042] The embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0043] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model 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 thus should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality" means two or more unless otherwise specifically defined.

[0044] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected" and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0045] Reference will be made below to Figures 1 - 11 describe the cold plate 10 according to an embodiment of the present utility model.

[0046] According to the cold plate 10 of the embodiment of the first aspect of the present utility model, the cold plate 10 is used for the battery 100. The battery 100 includes battery cells 101. The cold plate 10 is provided on at least one side of the battery cell 101. It can be that there is a cold plate 10 between two adjacent battery cells 101, or there is a cold plate 10 between the battery cell 101 and the housing of the battery pack. The cold plate 10 has a liquid cooling flow channel 3. The liquid cooling flow channel 3 can have a coolant, or the liquid cooling flow channel 3 can be filled with a cooling gas for heating or cooling the battery 100. When the battery 100 is in a low-temperature state, the coolant or the cooling gas can provide heat for the battery cell 101 to increase the temperature of the battery cell 101; after the battery 100 is used for a period of time, the temperature of the battery 100 is relatively high, and the coolant or the cooling gas can provide cooling capacity for the battery cell 101 to reduce the temperature of the battery cell 101, thereby increasing the service life of the battery 100.

[0047] The cold plate 10 includes a first plate body 11 and a second plate body 21. The first plate body 11 and the second plate body 21 are connected so that a liquid cooling flow channel 3 is provided between the first plate body 11 and the second plate body 21. For example, the edges of the first plate body 11 and the second plate body 21 can be folded towards the opposite plate body to seal the liquid cooling flow channel 3.

[0048] The cold plate 10 further includes a first elastic member 4. The first elastic member 4 is located in the liquid cooling flow channel 3 and is supported between the first plate body 11 and the second plate body 21. During the charging and discharging process of the battery 100, the battery 100 will gradually expand. An appropriate expansion force is beneficial to the chemical reaction and performance release of the battery 100. However, an excessive expansion force will cause local aging, heating or lithium plating phenomenon of the battery 100, thereby reducing the life of the battery 100. By arranging the first elastic member 4 in the liquid cooling flow channel 3, during the charging and discharging process of the battery 100, the battery cell 101 expands towards the direction of the cold plate 10, and the first elastic member 4 contracts, which can facilitate the expansion of the battery cell 101; after the battery cell 101 expands to a certain extent, the contraction of the first elastic member 4 reaches the critical point, and the first elastic member 4 no longer continues to contract, that is, the first elastic member 4 can support the first plate body 11 and the second plate body 21, so that the cold plate 10 is supported on one side of the battery cell 101, preventing the battery cell 101 from continuing to expand, thereby increasing the service life of the battery 100.

[0049] The cold plate 10 is located between the large surfaces of adjacent battery cells 101. That is, the first plate body 11 abuts against the large surface of one battery cell 101, and the second plate body 21 abuts against the large surface of another adjacent battery cell 101. When the battery cell 101 expands, the expansion force of the battery cell 101 mainly concentrates on the central position of the large surface of the battery. The first elastic member 4 is supported between the first plate body 11 and the second plate body 21, that is, the first elastic member 4 is supported between the large surfaces of two adjacent battery cells 101, preventing the battery cell 101 from over-expanding and increasing the service life of the battery 100.

[0050] According to the cold plate 10 of the embodiment of the present invention, the cold plate 10 includes a connected first plate body 11 and a second plate body 21, and a first elastic member 4 supported between the first plate body 11 and the second plate body 21. The cold plate 10 can effectively cool the battery 100 and reduce the temperature of the battery 100. The cold plate 10 can also be supported on at least one side of the battery cell 101, that is, it can provide a compression space for the expansion of the battery cell 101 and prevent the battery cell 101 from over-expanding, increasing the service life of the battery 100.

[0051] According to some embodiments of the present invention, referring to Figures 1 - 9 , the first elastic member 4 includes a plurality of elastic units 41. The plurality of elastic units 41 are spaced apart along the first direction (for example, referring to the e1 direction in the attached Figure 5 figure). There is a connecting plate 42 between two adjacent elastic units 41 for connecting two adjacent elastic units 41. When the elastic unit 41 contracts, the elastic unit 41 can expand in the direction of the connecting plate 42, providing a contraction space for the elastic unit 41.

[0052] The elastic force of the first elastic member 4 is adjusted by adjusting the number of elastic units 41 and connecting plates 42 to match the different expansion forces when different battery cells expand.

[0053] The elastic unit 41 abuts against the first plate body 11, or the elastic unit 41 can abut against the second plate body 21, or the elastic unit 41 abuts against both the first plate body 11 and the second plate body 21, for fixing the elastic unit 41 to the first plate body 11 or the second plate body 21 or both the first plate body 11 and the second plate body 21.

[0054] When the elastic unit 41 abuts against the first plate body 11 and is spaced apart from the second plate body 21, the spaced space between the elastic unit 41 and the second plate body 21 can provide an expansion space for the expansion of the battery cell 101; when the elastic unit 41 abuts against the second plate body 21 and is spaced apart from the first plate body 11, the spaced space between the elastic unit 41 and the first plate body 11 can provide an expansion space for the expansion of the battery cell 101; when the elastic unit 41 abuts against both the first plate body 11 and the second plate body 21, the elastic unit 41 can undergo elastic deformation to provide an expansion space for the expansion of the battery cell 101.

[0055] According to some embodiments of the present invention, referring to Figures 1 - 9 , the elastic unit 41 includes a honeycomb elastic unit. There is a cavity 411 inside the elastic unit 41. The cavity 411 extends along the second direction (for example, referring to the e2 direction in the attached Figure 5 . The cavity 411 can provide a compression space for the contraction of the elastic unit 41, and a coolant or a cooling medium can be filled in the cavity 411 to provide heat or cold for the battery cell 101. The second direction is perpendicular to the first direction.

[0056] The honeycomb elastic unit includes six side plates 412 connected in sequence, and the honeycomb elastic unit is configured as an equilateral hexagon, so that the honeycomb elastic unit has a symmetric structure and uniform stress.

[0057] According to some embodiments of the present invention, referring to Figures 1 - 10 , the cold plate 10 further includes a second elastic member 5. The second elastic member 5 is located in the liquid cooling channel 3 and is spaced apart from the first elastic member 4 along the first direction. The second elastic member 5 can also play a role in supporting the first plate body 11 and the second plate body 21. Under the combined action of the first elastic member 4 and the second elastic member 5, the first plate body 11 and the second plate body 21 can be better supported, and thus at least one side of the battery cell 101 can be better supported to prevent the battery cell 101 from excessive expansion.

[0058] According to some embodiments of the present invention, referring to Figures 1 - 10 , the cold plate 10 further includes a first end plate 12 and a second end plate 13. The first end plate 12 and the second end plate 13 are connected to both ends of the first plate body 11 in the first direction; the cold plate 10 further includes a third end plate 22 and a fourth end plate 23. The third end plate 22 and the fourth end plate 23 are connected to both ends of the second plate body 21 in the first direction. The first end plate 12 can be connected to the third end plate 22, and the second end plate 13 can be connected to the fourth end plate 23 to seal the liquid cooling channel 3.

[0059] The first end plate 12 is located on the side of the third end plate 22 close to the liquid cooling channel 3, and the fourth end plate 23 is located on the side of the second end plate 13 close to the liquid cooling channel 3. Among them, the second elastic member 5 has a mounting portion 52, and the mounting portion 52 is clamped between the first end plate 12 and the third end plate 22, or the mounting portion 52 is clamped between the second end plate 13 and the fourth end plate 23 to provide a mounting position for the second elastic member 5. There may be two second elastic members 5. The mounting portion 52 of one second elastic member 5 is clamped between the first end plate 12 and the third end plate 22, and the mounting portion 52 of the other second elastic member 5 is clamped between the second end plate 13 and the fourth end plate 23. The first elastic member 4 is located between the two second elastic members 5, that is, the second elastic member 5 is located at the edge of the liquid cooling channel 3, and the first elastic member 4 is located in the middle of the liquid cooling channel 3.

[0060] According to some embodiments of the present invention, referring to Figures 1 - 10 , the second elastic member 5 includes an arc-shaped plate 51 and a mounting portion 52. The arc-shaped plate 51 is connected to one end of the mounting portion 52, and the other end of the arc-shaped plate 51 is a free end 511. A limiting plate 31 is arranged in the liquid cooling channel 3. The limiting plate 31 is spaced apart from both the free end 511 and the first elastic member 4. The limiting plate 31 restricts the deformation amount of the arc-shaped plate 51 by restricting the movement range of the free end 511, and the limiting plate 31 also restricts the deformation amount of the first elastic member 4 by restricting the movement range of the first elastic member 4, thereby restricting the deformation amount of the first plate body 11 and the second plate body 21.

[0061] The free end 511 of one second elastic member 5 abuts against the first plate body 11, and the free end 511 of the other second elastic member 5 abuts against the second plate body 21. When the second elastic member 5 undergoes elastic deformation, the free end 511 can move along the first plate body 11 and the second plate body 21, which can play a guiding role in the compression deformation direction of the second elastic member 5.

[0062] When the free end 511 deforms to the limiting plate 31 and the first elastic member 4 deforms to the limiting plate 31, the arc-shaped plate 51 and the first elastic member 4 no longer undergo elastic deformation, that is, the first plate body 11 and the second plate body 21 no longer deform towards each other, which can prevent the battery cell 101 from over-expanding.

[0063] Among them, the mounting portion 52 is located between the first end plate 12 and the third end plate 22, the limiting plate 31 is located on the first plate body 11, the mounting portion 52 is located between the second end plate 13 and the fourth end plate 23, and the limiting plate 31 is located on the second plate body 21, which is convenient for the installation and fixation of the limiting plate 31.

[0064] According to some embodiments of the present invention, referring to Figures 5 - 7 、 Figure 10, the installation part 52 includes a first folding plate 521, a second folding plate 522 and a third folding plate 523. The second folding plate 522 and the third folding plate 523 are connected to both ends of the first folding plate 521 in the first direction, and the second folding plate 522 and the third folding plate 523 are arranged in parallel to construct a limiting groove 525 between the first folding plate 521, the second folding plate 522 and the third folding plate 523.

[0065] Wherein, the first end plate 12 is inserted into the limiting groove 525, or the fourth end plate 23 is inserted into the limiting groove 525 for the installation and fixation of the installation part 52.

[0066] According to some embodiments of the present invention, referring to Figures 5 - 7 , Figure 10 , the first end plate 12 is inserted into the limiting groove 525, the arc-shaped plate 51 protrudes towards the second plate body 21, and the arc-shaped plate 51 is spaced apart from the second plate body 21 in the third direction (for example, referring to the e2 direction in the attached Figure 1 ) to provide a compression space for the compression of the first plate body 11 and the second plate body 21, that is, to provide an expansion space for the expansion of the battery cell 101.

[0067] Or, the fourth end plate 23 is inserted into the limiting groove 525, the arc-shaped plate 51 protrudes towards the first plate body 11, and is spaced apart from the first plate body 11 in the third direction to provide a compression space for the compression of the first plate body 11 and the second plate body 21, that is, to provide an expansion space for the expansion of the battery cell 101.

[0068] According to some embodiments of the present invention, referring to Figures 5 - 7 , Figure 10 , the first end plate 12 is inserted into the limiting groove 525, and both sides of the second folding plate 522 along the first direction are respectively in contact with the third end plate 22 and the first end plate 12. The installation part 52 is used to seal the gap between the first end plate 12 and the third end plate 22, to increase the sealing performance of the liquid cooling channel 3, and at the same time, it is also convenient for the installation and fixation of the second elastic member 5.

[0069] Or, the fourth end plate 23 is inserted into the limiting groove 525, and both sides of the second folding plate 522 along the first direction are respectively in contact with the fourth end plate 23 and the second end plate 13. The installation part 52 is used to seal the gap between the second end plate 13 and the fourth end plate 23, to increase the sealing performance of the liquid cooling channel 3, and at the same time, it is also convenient for the installation and fixation of the second elastic member 5.

[0070] The two second elastic members 5 are centrosymmetric about the center of the second direction of the liquid cooling channel 3.

[0071] According to some embodiments of the present invention, referring to Figures 5 - 7 , Figure 10, the installation part 52 further includes a fourth folding plate 524. The fourth folding plate 524 is connected between the third folding plate 523 and the arc plate 51. The first end plate 12 is inserted into the limit groove 525. The fourth folding plate 524 abuts against the first plate body 11, which is used to increase the contact area between the second elastic member 5 and the first plate body 11, facilitating the elastic deformation of the arc plate 51.

[0072] Alternatively, the fourth end plate 23 is inserted into the limit groove 525. The fourth folding plate 524 abuts against the second plate body 21, which is used to increase the contact area between the second elastic member 5 and the second plate body 21, facilitating the elastic deformation of the arc plate 51.

[0073] According to some embodiments of the present invention, referring to Figures 5 - 7 , Figure 10 , the first end plate 12 is inserted into the limit groove 525. The minimum distance between the arc plate 51 and the second plate body 21 in the third direction is H, and the distance between the first folding plate 521 and the second plate body 21 in the third direction is h; or, the fourth end plate 23 is inserted into the limit groove 525. The minimum distance between the arc plate 51 and the first plate body 11 in the third direction is H, and the distance between the first folding plate 521 and the first plate body 11 in the third direction is h.

[0074] There is a distance between the first folding plate 521 of one second elastic member 5 and the first plate body 11, and there is also a distance between the first folding plate 521 of the other second elastic member 5 and the second plate body 21, and the distances are equal. When the cold plate 10 is installed on at least one side of the battery cell 101 and the battery 100 is grouped, the first plate body 11 and the second plate body 21 of the cold plate 10 approach each other in the direction of approaching each other. When the compression amount reaches h, the first plate body 11 and the second plate body 21 no longer move in the direction of approaching each other, providing a space for pre-tightening force for the grouping of the battery pack.

[0075] The relationship between H and h satisfies: 0 < h ≤ H. After the battery pack is grouped, the compression amount between the first plate body 11 and the second plate body 21 reaches h, and there is still a spacing space of H - h ≥ 0 between the arc plate 51 and the first plate body 11 or the second plate body 21, avoiding the elastic deformation of the arc plate 51 when the battery pack is grouped. For example, H can be 1.5 mm.

[0076] The battery 100 according to the second aspect embodiment of the present invention includes: the cold plate 10 according to the first aspect embodiment of the present invention above.

[0077] According to the battery 100 of the embodiment of the present invention, by providing the above cold plate 10, the battery 100 can be effectively cooled, reducing the temperature of the battery 100; it can also provide a space for the expansion of the battery cell 101, and can also prevent the battery cell 101 from over-expanding, improving the service life of the battery 100.

[0078] The electrical device according to the third aspect embodiment of the present utility model includes: the battery 100 according to the second aspect embodiment of the present utility model above.

[0079] The electrical device according to the embodiment of the present utility model, by providing the above-mentioned battery 100, can effectively cool the battery 100, reduce the temperature of the battery 100; can also provide space for the expansion of the battery cell 101, and can avoid the excessive expansion of the battery cell 101, improve the service life of the battery 100, and further improve the usage time of the electrical device. In the description of this specification, the description with reference to terms such as "some embodiments", "optionally", "further", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0080] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A cold plate for use in a battery, characterized in that, The battery includes battery cells, and the cold plate is provided on at least one side of the battery cells. The cold plate includes: A first plate body; A second plate body, the first plate body and the second plate body are connected, and a liquid cooling channel is provided between the first plate body and the second plate body; A first elastic member, the first elastic member is located in the liquid cooling channel, and the first elastic member is supported between the first plate body and the second plate body.

2. The cold plate according to claim 1, characterized in that, The first elastic member includes a plurality of elastic units spaced apart in a first direction and connecting plates connected between two adjacent elastic units, and the elastic units are in contact with the first plate body and / or the second plate body.

3. The cold plate according to claim 2, wherein The elastic unit includes a honeycomb-shaped elastic unit, and a cavity extending in a second direction is provided in the elastic unit, and the second direction is perpendicular to the first direction.

4. The cold plate according to claim 1, wherein The cold plate further includes a second elastic member, the second elastic member is located in the liquid cooling channel and is spaced apart from the first elastic member in the first direction.

5. The cold plate according to claim 4, characterized in that, The cold plate further includes a first end plate and a second end plate connected to both ends of the first plate body in the first direction and a third end plate and a fourth end plate connected to both ends of the second plate body in the first direction. Among them, The second elastic member has a mounting portion, and the mounting portion is clamped between the first end plate and the third end plate, or the mounting portion is clamped between the second end plate and the fourth end plate.

6. The cold plate according to claim 5, wherein, The second elastic member includes an arc-shaped plate and the mounting portion connected to one end of the arc-shaped plate. The other end of the arc-shaped plate is a free end. A limiting plate is provided in the liquid cooling channel, and the limiting plate is spaced apart from both the free end and the first elastic member. The limiting plate restricts the deformation amount of the arc-shaped plate by restricting the movement range of the free end. Among them, the limiting plate is located on the first plate body or the second plate body.

7. The cold plate according to claim 6, characterized in that The mounting portion includes a first folding plate and second folding plates and third folding plates connected to both ends of the first folding plate in the first direction. The second folding plate and the third folding plate are arranged in parallel to form a limiting groove between the first folding plate, the second folding plate and the third folding plate. Among them, the first end plate is inserted into the limiting groove, or the fourth end plate is inserted into the limiting groove.

8. The cold plate according to claim 7, wherein The first end plate is inserted into the limiting groove, the arc-shaped plate protrudes toward the second plate body and is spaced apart from the second plate body in a third direction; or, The fourth end plate is inserted into the limiting groove, the arc-shaped plate protrudes toward the first plate body and is spaced apart from the first plate body in a third direction.

9. The cold plate according to claim 7, wherein The first end plate is inserted into the limiting groove, and both sides of the second folding plate in the first direction are in contact with the third end plate and the first end plate respectively; or, The fourth end plate is inserted into the limiting groove, and both sides of the second folding plate in the first direction are in contact with the fourth end plate and the second end plate respectively.

10. The cold plate according to claim 7, characterized in that, The mounting portion further includes a fourth folding plate connected between the third folding plate and the arc-shaped plate, The first end plate is inserted into the limiting groove, and the fourth folding plate abuts against the first plate body; or, The fourth end plate is inserted into the limiting groove, and the fourth folding plate abuts against the second plate body.

11. The cold plate according to claim 8, wherein The first end plate is inserted into the limiting groove, the minimum distance between the arc-shaped plate and the second plate body in the third direction is H, and the distance between the first folding plate and the second plate body in the third direction is h; or, The fourth end plate is inserted into the limiting groove, the minimum distance between the arc-shaped plate and the first plate body in the third direction is H, and the distance between the first folding plate and the first plate body in the third direction is h; Satisfying: 0 < h ≤ H.

12. A battery, characterized in that, Including: The cold plate according to any one of claims 1-11.

13. An electrical device, characterized in that, Including: The battery according to claim 12.

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