Liquid cooling structure, battery cell module and battery

Abstract

The utility model provides a liquid cooling structure, a battery cell module and a battery, and relates to the technical field of energy storage. The liquid cooling structure comprises two liquid cooling plates arranged at an interval and an elastic assembly located between the two liquid cooling plates. The liquid cooling plates are used for being in contact with the side surfaces of the battery cell units; the elastic assembly comprises a plurality of elastic parts which are arranged at intervals in the height direction of the liquid cooling plate, a buffer cavity is defined by any adjacent elastic parts and the liquid cooling plate, and the elastic parts and the buffer cavities are used for absorbing expansion force generated by the battery cell units. The liquid cooling structure can be prevented from being damaged, the cooling effect of the liquid cooling structure is ensured, and the performance of the battery is further improved.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of energy storage technology, and in particular to a liquid cooling structure, a battery cell module and a battery. Background Art

[0002] With the widespread use of new energy vehicles, batteries are widely used in new energy vehicles as power output devices of new energy vehicles.

[0003] In the related art, a battery generally includes a shell and at least one battery cell module located in the shell, and each battery cell module includes a plurality of stacked battery cells. The battery cells need to generate a large amount of heat during operation, and a liquid cooling structure is generally used to cool the battery cells.

[0004] However, the liquid cooling structure is easily damaged during the use of the battery, which affects the cooling effect of the liquid cooling structure and thus reduces the performance of the battery. Utility Model Content

[0005] In view of the above problems, the embodiments of the present application provide a liquid cooling structure, a battery cell module and a battery, which can prevent the liquid cooling structure from being damaged, ensure the cooling effect of the liquid cooling structure, and thus improve the performance of the battery.

[0006] In order to achieve the above objectives, the embodiments of the present application provide the following technical solutions:

[0007] A first aspect of an embodiment of the present application provides a liquid cooling structure, comprising: two liquid cooling plates arranged at intervals, and an elastic component located between the two liquid cooling plates; the liquid cooling plates are used to contact the side surfaces of a battery cell unit;

[0008] The elastic component includes a plurality of elastic members spaced apart along the height direction of the liquid cooling plate, and a buffer cavity is formed between any adjacent elastic members and the liquid cooling plate. The elastic members and the buffer cavity are used to absorb the expansion force generated by the battery cell unit.

[0009] In a possible implementation manner, each of the elastic members is a plate-shaped elastic sheet, and the elastic member and the liquid cooling plate are arranged obliquely; or each of the elastic members includes at least one arc segment.

[0010] In a possible implementation, a plurality of partition plates are provided in the liquid cooling plate, and the plurality of partition plates are spaced apart along the height direction of the liquid cooling plate, and in a first direction, a preset distance is provided between an end of each partition plate and an inner wall of a corresponding liquid cooling plate;

[0011] Wherein, the first direction and the height direction of the liquid cooling plate are perpendicular to each other.

[0012] In a possible implementation, the partition plate and the liquid cooling plate are an integrated piece.

[0013] In a possible implementation, in the first direction, opposite side walls of the liquid cooling plate are respectively provided with a liquid inlet and a liquid outlet.

[0014] In a possible implementation, the thickness of the partition plate is 0.1 mm to 3 mm; the thickness of the elastic member is 0.1 mm to 3 mm; and the thickness of the liquid cooling plate is 0.1 mm to 3 mm.

[0015] A second aspect of the embodiments of the present application provides a battery cell module, comprising: a plurality of battery cell units and the liquid cooling structure described in the first aspect;

[0016] The plurality of battery core units are arranged at intervals along the second direction, and the liquid cooling structure is arranged at least between adjacent battery core units.

[0017] In a possible implementation manner, each of the battery cell units includes a plurality of battery cell units sequentially arranged along a first direction, and the first direction and the second direction are perpendicular to each other.

[0018] In a possible implementation, the liquid cooling structure is arranged in close contact with the side of the battery cell unit adjacent thereto, and the top surface of the liquid cooling structure is flush with the top surface of the battery cell unit, and the bottom surface of the liquid cooling structure is flush with the bottom surface of the battery cell unit.

[0019] A third aspect of the embodiment of the present application provides a battery, comprising a housing and the battery module according to the second aspect, wherein the battery module is arranged in the housing.

[0020] In the liquid cooling structure, battery cell module and battery provided in the embodiment of the present application, an elastic component is arranged between two liquid cooling plates, and the elastic component includes a plurality of elastic members arranged at intervals along the height direction of the liquid cooling plates, and a buffer cavity is formed between any adjacent elastic members and the liquid cooling plates. Since the elastic member has a certain elastic force, the elastic member and the buffer cavity can absorb the thickness tolerance caused by the expansion force generated by the battery cell unit, and adapt to the dimensional changes caused by the breathing effect of the battery cell unit during the charging and discharging process, and absorb the dimensional expansion of the battery cell unit throughout its life cycle, thereby ensuring the cooling effect of the liquid cooling structure, extending the service life of the liquid cooling structure, and thus improving the performance of the battery.

[0021] In addition to the technical problems solved by the embodiments of the present application, the technical features that constitute the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions described above, other technical problems that can be solved by the liquid cooling structure, battery cell module and battery provided by the embodiments of the present application, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further described in detail in the specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 Schematic diagram of the liquid cooling structure provided in the embodiment of the present application Figure 1 ;

[0024] Figure 2 for Figure 1 A cross-sectional view of

[0025] Figure 3 An exploded view of a liquid cooling structure provided in an embodiment of the present application;

[0026] Figure 4 Schematic diagram of the liquid cooling structure provided in the embodiment of the present application Figure 2 ;

[0027] Figure 5 for Figure 4 A cross-sectional view of

[0028] Figure 6 Schematic diagram of the liquid cooling structure provided in the embodiment of the present application Figure 3 ;

[0029] Figure 7 for Figure 6 A cross-sectional view of

[0030] Figure 8 A schematic diagram of a battery cell module provided in an embodiment of the present application;

[0031] Fig. 9 An exploded diagram of the battery cell module provided in an embodiment of the present application.

[0032] Description of reference numerals:

[0033] 100: Liquid cooling structure;

[0034] 110: liquid cooling plate; 111: circulation channel; 112: top plate; 113: bottom plate; 114: left side plate; 115: right side plate; 116: front side plate;

[0035] 120: elastic member;

[0036] 130: liquid inlet;

[0037] 140: separator;

[0038] 150: buffer chamber;

[0039] 200: battery cell unit; 210: battery cell monomer. DETAILED DESCRIPTION

[0040] As described in the background technology, the problem of the liquid cooling structure in the related art being easily damaged, the inventors have found through research that the reason for this problem is that in the related art, the liquid cooling structure usually includes a single liquid cooling plate, and the liquid cooling plate is arranged at the bottom of the battery cell unit to cool the battery cell unit. However, the breathing phenomenon and thermal expansion and contraction phenomenon of the battery cell unit during the charging and discharging process will cause the size of the battery cell unit to change, thereby squeezing the liquid cooling structure, which is easy to cause the liquid cooling structure to deform, which will not only reduce the cooling effect of the liquid cooling structure, but also reduce the service life of the liquid cooling structure, thereby reducing the performance of the battery.

[0041] In response to the above technical problems, the embodiments of the present application provide a liquid cooling structure, a battery cell module and a battery, wherein an elastic component is arranged between two liquid cooling plates, and the elastic component includes a plurality of elastic members arranged at intervals along the height direction of the liquid cooling plates, and a buffer cavity is formed between any adjacent elastic members and the liquid cooling plates. Since the elastic member has a certain elastic force, the elastic member and the buffer cavity can absorb the thickness tolerance caused by the expansion force generated by the battery cell unit, and adapt to the dimensional changes caused by the breathing effect during the charging and discharging process of the battery cell unit, and absorb the dimensional expansion of the battery cell unit throughout its life cycle, thereby ensuring the cooling effect of the liquid cooling structure, extending the service life of the liquid cooling structure, and thus improving the performance of the battery.

[0042] In order to make the above-mentioned purposes, features and advantages of the embodiments of the present application more obvious and understandable, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of this application.

[0043] Embodiment 1

[0044] Please refer to the attached Figure 1 To Attachment Figure 7 The embodiment of the present application provides a liquid cooling structure 100, which is used to cool down a structure that needs heat dissipation. For example, the liquid cooling structure 100 is used to cool down a battery cell unit 200 (please refer to the attached Fig. 9 ) to cool down.

[0045] Among them, the liquid cooling structure 100 includes two liquid cooling plates 110 and an elastic component. The two liquid cooling plates 110 are arranged at intervals, and the elastic component is arranged between the two liquid cooling plates 110, that is, one end of the elastic component is connected to one of the liquid cooling plates 110, and the other end of the elastic component is connected to the other liquid cooling plate 110.

[0046] Please continue to refer to the attached Figure 2 The liquid cooling plate 110 is used to connect with the battery cell unit 200 (please refer to the attached Fig. 9 ), and a circulation channel 111 for the flow of liquid coolant is formed inside the liquid cooling plate 110, wherein the shape of the circulation channel 111 can be regular or irregular. In this embodiment, the shape of the liquid cooling plate 110 can also be regular. For example, please refer to the attached Figure 1 and attached Figure 3 As shown, the liquid cooling plate 110 includes a top plate 112, a bottom plate 113, and a side plate disposed between the top plate 112 and the bottom plate 113. Figure 1 and attached Figure 3 Taking the illustrated position as an example, the side panels include a left side panel 114, a right side panel 115, and a front side panel 116 and a rear side panel (not shown in the figure) located between the left side panel 114 and the right side panel 115, so that the liquid cooling structure 100 forms a structure with a rectangular flow channel. In this way, the left side panel 114 and the right side panel 115 are plate-shaped bodies, which can be easily connected to the elastic component.

[0047] In order to facilitate better exchange and circulation of the liquid coolant in the circulation channel 111 with the outside world, the liquid cooling structure 100 provided in the embodiment of the present application also includes a liquid inlet 130 and a liquid outlet (not shown in the figure), wherein the liquid inlet 130 is used to connect to the liquid supply device, and the liquid outlet can also be connected to the liquid supply device to ensure the circulation of the liquid coolant. Exemplarily, the liquid inlet 130 is provided on the front side plate 116 of the liquid cooling plate 110, and the liquid outlet (not shown in the figure) is provided on the rear side plate of the liquid cooling plate 110; the liquid inlet and the liquid outlet are arranged relative to each other, which can improve the fluidity of the liquid coolant in the circulation channel 111, thereby improving the cooling effect of the liquid cooling structure 100.

[0048] It should be noted that the circulation channel 111 can be a single channel or other options are available. Exemplarily, a plurality of partition plates 140 are provided in the liquid cooling plate 110, and the plurality of partition plates 140 are spaced apart along the height direction of the liquid cooling plate 110, and in the first direction, there is a preset distance between the end of each partition plate 140 and the inner wall of the corresponding liquid cooling plate 110; wherein the first direction is perpendicular to the height direction of the liquid cooling plate 110. It should be understood that the first direction is the direction of the liquid cooling plate 110. Figure 2 In the Y direction, the height direction of the liquid cooling plate 110 is Figure 2 Middle Z direction.

[0049] In the first direction, there is a preset distance between the end of each partition plate 140 and the inner wall of the corresponding liquid cooling plate 110, that is, in the first direction, there is a preset distance between each partition plate 140 and the front side plate 116 and the rear side plate, so that the sub-circulation channels surrounded by any adjacent partition plates 140 are interconnected, so that the liquid coolant flows in the circulation channel 111 to absorb the battery cell unit 200 (please refer to the attached Figure 8 )The heat released.

[0050] In this embodiment, by disposing a plurality of partition plates 140 , the flow path of the liquid coolant in the flow channel 111 is increased, thereby improving the cooling effect of the liquid cooling structure 100 .

[0051] It should be noted that in this embodiment, the partition plate 140 and the liquid cooling plate 110 can be an integral part or a separate part. In one example, the partition plate 140 and the liquid cooling plate 110 are an integral part, which can be formed by extrusion of an integral profile, and has the advantages of high structural strength and simple preparation process. In another example, the partition plate 140 can be fixedly connected to the liquid cooling plate 110 by a molding process such as welding or bonding. In this way, the number of partition plates 140 can be set according to actual needs, thereby improving the flexibility of the liquid cooling structure 100.

[0052] Please continue to refer to the attached Figure 1 To Attachment Figure 7 The elastic component includes a plurality of elastic members 120, and the plurality of elastic members 120 are spaced apart along the height direction of the liquid cooling plate 110 so that a buffer cavity 150 is formed between any adjacent elastic members 120 and the liquid cooling plate 110, and the elastic members and the buffer cavity are used to absorb the expansion force generated by the battery cell unit 200.

[0053] Given that the elastic member 120 has a certain elastic force, the elastic member 120 and the buffer cavity 150 can absorb the thickness tolerance caused by the expansion force generated by the battery cell unit 200, and adapt to the size change caused by the breathing effect during the charging and discharging process of the battery cell unit 200, and absorb the size expansion of the battery cell unit 200 throughout its life cycle, thereby ensuring the cooling effect of the liquid cooling structure, extending the service life of the liquid cooling structure, and thereby improving the performance of the battery.

[0054] For an example, see the attached Figure 1 To Attachment Figure 3 Each elastic member 120 may be a plate-shaped elastic sheet, and the elastic member 120 is arranged obliquely with respect to the liquid cooling plate 110. For example, the elastic member 120 is inclined upward relative to the liquid cooling plate 110, which is equivalent to an acute angle between the elastic member 120 and the height direction of the liquid cooling plate 110. For another example, the elastic member 120 is inclined downward relative to the liquid cooling plate 110, which is equivalent to an obtuse angle between the elastic member 120 and the height direction of the liquid cooling plate 110.

[0055] In another example, each elastic member 120 includes at least one arc segment. Figure 4 and attached Figure 5 Each elastic member 120 includes an arc segment, one end of which is connected to one of the liquid cooling plates 110, and the other end of which is connected to the other liquid cooling plate 110. The arc of the arc segment can be directed toward the top of the liquid cooling plate 110 or toward the bottom of the liquid cooling plate 110. For another example, please refer to the attached Figure 6 and attached Figure 7 Each elastic member 120 includes two arc-shaped segments connected to each other. In this way, the shape of each elastic member 120 can be reasonably set according to the distance between the two liquid cooling plates 110, thereby improving the applicability of the liquid cooling structure.

[0056] In this example, the thickness of the partition plate 140 is 0.1 mm to 3 mm; for example, the thickness of the partition plate 140 is 0.5 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm, or 3 mm. The thickness of the elastic member 120 is 0.1 mm to 3 mm; for example, the thickness of the elastic member 120 is 0.5 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm, or 3 mm. The thickness of the liquid cooling plate 110 is 0.1 mm to 3 mm, for example, the thickness of the liquid cooling plate 110 is 0.5 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm, or 3 mm.

[0057] By reasonably setting the thickness of the partition plate 140, the elastic member 120 and the liquid cooling plate 110, the cooling effect of the liquid cooling structure 100 can be fully realized, the deformation of the liquid cooling structure 100 can be reduced, the service life of the liquid cooling structure 100 can be extended, and the performance of the battery can be improved.

[0058] In this embodiment, the materials of the elastic member 120 , the liquid cooling plate 110 and the partition plate 140 include but are not limited to aluminum alloy, magnesium alloy and other metal and non-metal materials with high thermal conductivity.

[0059] Embodiment 2

[0060] An embodiment of the present application provides a battery cell module, which can be applied to a battery and then applied to an electrical device to provide electrical energy to the electrical device.

[0061] Please refer to the attached Figure 8 and attached Fig. 9 The battery cell module includes a plurality of battery cell units 200, and the plurality of battery cell units 200 are arranged along the second direction; in other words, the plurality of battery cell units 200 are arranged along the second direction. Figure 8 and attached Fig. 9 Arranged in the X direction.

[0062] The battery cell module also includes the liquid cooling structure 100 described in the first embodiment, wherein the liquid cooling structure 100 is at least arranged between any adjacent battery cell units 200, that is, the liquid cooling structure 100 is arranged between at least any two adjacent battery cell units 200. In one example, the number of battery cell units 200 is greater than the number of liquid cooling structures 100, and the liquid cooling structure 100 is only arranged between adjacent battery cell units 200. In another example, the number of battery cell units 200 may be equal to the number of liquid cooling structures 100. Please refer to the attached Figure 8 , the liquid cooling structure 100 is not only arranged between adjacent battery cell units 200, but also arranged at one end of multiple battery cell units 200 in the first direction. The number of battery cell units 200 is five, the number of liquid cooling structures 100 is five, a liquid cooling structure 100 is arranged between any adjacent battery cell units 200, and a liquid cooling structure 100 is arranged on the left side of the first battery cell unit 200. In another example, the number of battery cell units 200 is less than the number of liquid cooling structures 100, and the liquid cooling structure 100 is not only arranged between adjacent battery cell units 200, but also arranged at both ends of multiple battery cell units 200 in the first direction. For example, the number of battery cell units 200 is five, and the number of liquid cooling structures 100 is six. A liquid cooling structure 100 is arranged between any adjacent battery cell units 200, a liquid cooling structure 100 is arranged on the left side of the first battery cell unit 200, and a liquid cooling structure 100 is arranged on the right side of the last battery cell unit 200, so that a liquid cooling structure 100 is arranged on both sides of each battery cell unit 200, so as to quickly and effectively cool down the heat generated by the battery cell unit 200.

[0063] Since the liquid cooling structure 100 is provided on both the left and right sides of the battery cell unit 200, the battery cell unit 200 can be quickly cooled down, and the thickness tolerance caused by the expansion force generated by the battery cell unit 200 can be fully absorbed. The size change caused by the breathing effect during the charging and discharging process of the battery cell unit 200 can be adapted, and the size expansion of the battery cell unit 200 during the entire life cycle can be absorbed, so as to ensure the cooling effect of the liquid cooling structure 100 and extend the service life of the liquid cooling structure 100, thereby improving the performance of the battery cell module.

[0064] Please continue to refer to the attached Figure 8 , the liquid cooling structure 100 is arranged in abutment with the side of the battery cell unit 200 adjacent thereto. In order to facilitate the description of the positional relationship between the liquid cooling structure 100 and the battery cell unit 200, from left to right, the first liquid cooling structure 100 is arranged in abutment with the left side of the first battery cell unit 200; the second liquid cooling structure 100 is arranged in abutment with the right side of the first battery cell unit 200, and is also arranged in abutment with the left side of the second battery cell unit 200; the third liquid cooling structure 100 is arranged in abutment with the right side of the second battery cell unit 200, and is also arranged in abutment with the left side of the third battery cell unit 200; the fourth liquid cooling structure 100 is arranged in abutment with the right side of the third battery cell unit 200.

[0065] Compared with the technical solution of laminating the bottom surface of the liquid cooling structure 100 and the battery cell unit 200 in the related art, the battery cell module provided in the embodiment of the present application increases the heat exchange area between the liquid cooling structure 100 and the battery cell unit 200 and shortens the heat exchange path, greatly improving the heat exchange capacity of the liquid cooling structure 100, and can achieve rapid heating and cooling, thereby improving the cooling effect of the battery cell module, thereby improving the charging and discharging performance of the battery cell unit 200. At the same time, the side laminating arrangement of the liquid cooling structure 100 and the battery cell unit 200 does not need to bear the weight of the battery cell unit 200, so there is no need to strengthen the structural strength of the liquid cooling structure 100, reducing the preparation cost of the liquid cooling structure 100.

[0066] Please continue to refer to the attached Figure 8 and attached Fig. 9 The top surface of the liquid cooling structure 100 is flush with the top surface of the battery cell unit 200, and the bottom surface of the liquid cooling structure 100 is flush with the bottom surface of the battery cell unit 200. The top and bottom of the battery cell unit 200 can be in contact with the liquid cooling structure 100, which reduces the temperature difference between the top and bottom of the battery cell unit 200, achieves a balanced cooling effect on the top and bottom of the battery cell unit 200, and ensures the performance of the battery cell unit 200 and the accuracy of status monitoring.

[0067] In this example, each battery cell unit 200 includes a plurality of battery cell monomers 210 arranged in sequence along a first direction; wherein the first direction and the second direction are perpendicular to each other. Fig. 9 The Y direction in the second direction is the Fig. 9 The X direction in .

[0068] The liquid cooling structure 100 contacts the side surfaces of each battery cell 210 , which increases the heat exchange area between the liquid cooling structure 100 and each battery cell 210 and shortens the heat exchange path, greatly improving the heat exchange capacity of the liquid cooling structure 100 and thereby improving the cooling effect of the battery cell module.

[0069] Embodiment 3

[0070] The embodiment of the present application provides a battery, which can be applied to an electrical device to provide electrical energy to the electrical device. The electrical device in the embodiment of the present application can be a vehicle, for example: the vehicle can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. In addition, the electrical device can also be other energy storage devices, such as mobile phones, portable devices, laptops, electric toys, electric tools, ships and spacecraft, etc., wherein the spacecraft can include an airplane, a rocket, a space shuttle or a spacecraft.

[0071] The battery comprises a housing (not shown) and a cell module as described in any embodiment of Embodiment 2. The cell module is protected by the housing, wherein the structure of the housing can be found in the description of the related art, and will not be further described in this embodiment.

[0072] Since the battery in this embodiment includes the battery cell module in any of the above embodiments, the battery provided in this embodiment includes the structure and beneficial effects of the battery cell module, which will not be described in detail in this embodiment.

[0073] The various embodiments or implementation methods in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referenced to each other.

[0074] It should be noted that the phrases "one embodiment", "an embodiment", "an exemplary embodiment", "some embodiments", etc. mentioned in the specification indicate that the described embodiments may include certain features, structures or characteristics, but not every embodiment may include the certain features, structures or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. In addition, when describing certain features, structures or characteristics in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such features, structures or characteristics in conjunction with other embodiments, whether explicitly or not explicitly described.

[0075] In general, terms should be understood, at least in part, by the context in which they are used. For example, the term "one or more" as used herein may be used to describe any feature, structure, or characteristic in a singular sense, or may be used to describe a combination of features, structures, or characteristics in a plural sense, depending, at least in part, on the context. Similarly, terms such as "a," "an," or "the" may also be understood to convey singular usage or to convey plural usage, depending, at least in part, on the context.

[0076] It should be easily understood that “on,” “above,” and “over” in this application should be interpreted in the broadest manner, so that “on” not only means “directly on something,” but also includes the meaning of “on something” with intervening features or layers therebetween, and “above” or “over” not only includes the meaning of “above something” or “over,” but also may include the meaning of “above something” or “over” with no intervening features or layers therebetween (i.e., directly on something).

[0077] In the description of this application, it should be noted that, 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, or it can be an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0078] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of this application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the application described herein can be implemented in an order other than those illustrated or described herein, for example.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A liquid cooling structure, characterized in that: It comprises two liquid cooling plates arranged at intervals, and an elastic component located between the two liquid cooling plates; the liquid cooling plates are used to contact the side surfaces of the battery cell unit; The elastic component includes a plurality of elastic members spaced apart along the height direction of the liquid cooling plate, and a buffer cavity is formed between any adjacent elastic members and the liquid cooling plate. The elastic members and the buffer cavity are used to absorb the expansion force generated by the battery cell unit.

2. The liquid cooling structure according to claim 1, characterized in that: Each of the elastic members is a plate-shaped elastic sheet, and the elastic member is arranged obliquely with respect to the liquid cooling plate; or each of the elastic members includes at least one arc-shaped segment.

3. The liquid cooling structure according to claim 1, characterized in that: A plurality of partition plates are provided in the liquid cooling plate, and the plurality of partition plates are arranged at intervals along the height direction of the liquid cooling plate, and in a first direction, a preset distance is formed between the end of each partition plate and the inner wall of the corresponding liquid cooling plate; Wherein, the first direction and the height direction of the liquid cooling plate are perpendicular to each other.

4. The liquid cooling structure according to claim 3, characterized in that: The partition plate and the liquid cooling plate are an integral piece.

5. The liquid cooling structure according to claim 3, characterized in that: In the first direction, opposite side walls of the liquid cooling plate are respectively provided with a liquid inlet and a liquid outlet.

6. The liquid cooling structure according to any one of claims 3 to 5, characterized in that: The thickness of the partition plate is 0.1 mm to 3 mm; the thickness of the elastic member is 0.1 mm to 3 mm; and the thickness of the liquid cooling plate is 0.1 mm to 3 mm.

7. A battery module, characterized in that: Comprising a plurality of battery cell units and a liquid cooling structure according to any one of claims 1 to 6; The plurality of battery core units are arranged at intervals along the second direction, and the liquid cooling structure is arranged at least between adjacent battery core units.

8. The battery module according to claim 7, characterized in that: Each of the battery cell units includes a plurality of battery cell monomers arranged in sequence along a first direction, and the first direction and the second direction are perpendicular to each other.

9. The battery module according to claim 7, characterized in that: The liquid cooling structure is arranged in close contact with the side surface of the battery cell unit adjacent thereto, and the top surface of the liquid cooling structure is flush with the top surface of the battery cell unit, and the bottom surface of the liquid cooling structure is flush with the bottom surface of the battery cell unit.

10. A battery, characterized in that: It comprises a shell and the battery module according to any one of claims 7 to 9, wherein the battery module is arranged in the shell.

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