Battery pack and energy storage equipment

Abstract

The utility model provides a battery pack and energy storage equipment. The battery pack comprises a bracket, a plurality of battery cells and a temperature adjusting assembly, the plurality of battery cell arrays are arranged on the bracket; the temperature adjusting assembly is wound among the battery cells, and the two sides of the temperature adjusting assembly are provided with thermal contact parts. The bracket is provided with a plurality of limiting pieces, and the limiting pieces are arranged on the two sides of the temperature adjusting assembly in a staggered manner and are constructed to extrude the corresponding thermal contact parts, so that the thermal contact parts on the opposite sides of the extruded thermal contact parts are tightly attached to the surfaces of the corresponding battery cells. The battery pack extrudes the corresponding thermal contact parts through the limiting pieces, so that the thermal contact parts on the opposite sides of the extruded thermal contact parts are tightly attached to the surfaces of the corresponding battery cells, the risk that the thermal contact parts are separated from the surfaces of the battery cells is reduced, the empty burning phenomenon of the temperature adjusting assembly is reduced, and the service life of the temperature adjusting assembly is prolonged. Therefore, the temperature adjusting assembly can exchange heat with the battery cell more efficiently, the heat transfer efficiency between the temperature adjusting assembly and the battery cell is improved, the battery cell works more stably, and the reliability of the energy storage equipment is improved.

Description

Technical Field

[0001] This application relates to the field of battery pack technology for energy storage devices, specifically a battery pack and an energy storage device. Background Technology

[0002] Currently, battery packs for energy storage devices typically require heating of the cells in low-temperature environments to ensure normal operation. For example, related technologies use heating films to heat the cells. However, heating films often do not adhere tightly to the cell surface, causing partial detachment of the heating film from the cell surface. This results in the heating film burning dry, making it difficult to transfer heat from the heating film to the cell. Therefore, there is a problem of low heat transfer efficiency between the heating film and the cell. Utility Model Content

[0003] In view of this, this application provides a battery pack and energy storage device with higher efficiency in transferring heat from the battery cell.

[0004] One embodiment of this application provides a battery pack, including a bracket, multiple battery cells, and a temperature regulating component. The multiple battery cells are arrayed on the bracket. The temperature regulating component is wound around each battery cell, and both sides of the temperature regulating component have thermal contact portions. The bracket has multiple limiting members, which are staggered on both sides of the temperature regulating component and configured to compress the corresponding thermal contact portions, so that the thermal contact portion on the opposite side of the compressed thermal contact portion is in close contact with the surface of the corresponding battery cell.

[0005] In the battery pack provided in this application, the corresponding thermal contact portion is squeezed by the limiting member so that the thermal contact portion on the opposite side of the squeezed thermal contact portion is in close contact with the corresponding cell surface, reducing the risk of the thermal contact portion detaching from the cell surface, thereby reducing the dry burning phenomenon of the temperature control component, and thus enabling the temperature control component to exchange heat with the cell more efficiently, improving the heat transfer efficiency between the temperature control component and the cell.

[0006] In some embodiments, each limiting member is provided with a limiting groove and limiting protrusions are formed on opposite sides of the limiting groove. The limiting groove accommodates at least a portion of the thermal contact portion. The groove face of the limiting groove limits and compresses the thermal contact portion. The thermal contact portion is provided with a relief groove at the position corresponding to the limiting protrusion. The relief groove accommodates at least a portion of the limiting protrusion.

[0007] In some embodiments, each limiting member includes two extension arms, one end of one extension arm is connected to one end of the other extension arm, the other end of one extension arm extends away from the other end of the other extension arm, the two ends of the two extension arms are provided with notches opposite each other, the two notches and the space between the two notches form a limiting groove, and each extension arm has a limiting protrusion on the side of the notch facing away from the other extension arm.

[0008] In some embodiments, a first extrusion portion is formed in the portion of the thermal contact portion within each limiting groove, and a second extrusion portion is formed in the portion of the thermal contact portion between two adjacent limiting grooves and located outside the limiting groove. The first extrusion portion and the second extrusion portion are alternately disposed on both sides of the temperature regulating assembly, with the first extrusion portion on one side corresponding to the second extrusion portion on the other side. Each second extrusion portion corresponds to a battery cell, and the first extrusion portion is extruded by the limiting member to make the corresponding second extrusion portion adhere tightly to the surface of the battery cell.

[0009] In some embodiments, the axial directions of multiple battery cells are parallel, and the multiple battery cells are arranged to form a multilayer battery cell layer. The multilayer battery cell layer is stacked along a first direction, and the multiple battery cells in each battery cell layer are arranged along a second direction, which is perpendicular to the first direction. The multiple battery cells in adjacent battery cell layers are staggered, and the temperature regulating component is wound between adjacent battery cell layers.

[0010] In some embodiments, the distance between two adjacent cells in each cell layer is equal to the distance between two staggered adjacent cells in two adjacent cell layers, and the contact length between each cell and the thermal contact portion is the same along the circumferential direction of the cell.

[0011] In some embodiments, two adjacent cell layers form a double-layer cell unit, and a temperature regulating component is disposed between two adjacent cell layers in each double-layer cell unit, with a gap between two adjacent double-layer cell units.

[0012] In some embodiments, the bracket is provided with a fixing part, which includes a bonding surface and a positioning surface. The bonding surface is a plane or a curved surface extending along the outer periphery of the battery cell. The positioning surface is perpendicular to the bonding surface. The end of the temperature regulating component is bonded to the bonding surface and abuts against the positioning surface. The positioning surface is used to position the temperature regulating component relative to the bonding surface.

[0013] In some embodiments, the support includes a first frame and a second frame, which are joined together along the axial direction of the battery cells to form the support. A plurality of battery cells are disposed between the first frame and the second frame. The battery pack also includes a circuit board, which is disposed on one side of the first frame and the second frame perpendicular to the axial direction of the battery cells.

[0014] In one embodiment of this application, an energy storage device is also provided, which includes an inverter module and a battery pack as described in any of the above embodiments, wherein the inverter module is electrically connected to multiple battery cells.

[0015] The energy storage device provided in this application uses a limiting member to compress the corresponding thermal contact portion, so that the thermal contact portion on the opposite side of the compressed thermal contact portion is tightly attached to the surface of the corresponding battery cell. This reduces the risk of the thermal contact portion detaching from the surface of the battery cell, thereby reducing the dry burning phenomenon of the temperature control component. This allows the temperature control component to exchange heat with the battery cell more efficiently, improving the heat transfer efficiency between the temperature control component and the battery cell. As a result, the battery cell can work more stably, improving the reliability of the energy storage device. Attached Figure Description

[0016] Figure 1 This is a perspective view of an energy storage device according to an embodiment of this application.

[0017] Figure 2 for Figure 1 An exploded view of the energy storage device.

[0018] Figure 3 for Figure 2 A 3D view of the battery pack.

[0019] Figure 4 for Figure 3 An exploded view of the battery pack.

[0020] Figure 5 for Figure 3 A front view of the internal structure of the battery pack.

[0021] Figure 6 for Figure 5 A 3D diagram of the battery pack support structure.

[0022] Figure 7 for Figure 6 Enlarged view of point B in the middle.

[0023] Figure 8 for Figure 4 Side view of the temperature control component and thermal contact part.

[0024] Figure 9 for Figure 5 Enlarged view of point A in the middle.

[0025] Figure 10 This is a perspective view of the fixing part of the bracket in one embodiment of this application.

[0026] Explanation of main component symbols

[0027] 200-Energy storage device; 201-Housing; 100-Battery pack; 10-Bracket; 11-Fixing part; 111-Mating surface; 112-Positioning surface; 12-First frame; 13-Second frame; 20-Battery cell; 21-Battery cell layer; 22-Double-layer battery cell unit; 23-Gap; 30-Temperature regulating component; 40-Thermal contact part; 41-Allowing groove; 42-First extrusion part; 43-Second extrusion part; 50-Limiting part; 51-Limiting groove; 52-Limiting protrusion; 53-Extension arm; 531-Notch; 60-Circuit board. Detailed Implementation

[0028] The technical solution of this application will now be described with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments.

[0029] It should be noted that when one element is considered to be "connected to" or "located on" another element, it can be directly connected to the other element or may have an element positioned in between. In this application, the terms "installation," "connection," and "fixation," etc., should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium; it can refer to the internal connection of two elements. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. The terms "first," "second," etc., are only used to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary / secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined. The shape descriptions of length, thickness, width, etc., in the embodiments of this application are merely illustrative and should not constitute any absolute limitation on this application. The terms "vertical" and "parallel" are used to describe the ideal state between two components; errors may exist in the actual production or use state, and they are not absolute geometric descriptions.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The terms "or" and "and" as used herein include any and all combinations of one or more of the associated listed items.

[0031] Currently, battery packs for energy storage devices typically require heating of the cells in low-temperature environments to ensure normal operation. For example, related technologies use heating films to heat the cells. However, heating films often do not adhere tightly to the cell surface, causing partial detachment of the heating film from the cell surface. This results in the heating film burning dry, making it difficult to transfer heat from the heating film to the cell. Therefore, there is a problem of low heat transfer efficiency between the heating film and the cell.

[0032] In view of this, this application provides a battery pack with higher efficiency in heat transfer from the battery cells. The battery pack includes a support frame, multiple battery cells, and a temperature regulating component. Multiple battery cells are arrayed on the support frame. The temperature regulating component is wound around each battery cell, and both sides of the temperature regulating component have thermal contact portions. The support frame has multiple limiting members, which are staggered on both sides of the temperature regulating component and configured to compress the corresponding thermal contact portions, so that the thermal contact portion on the opposite side of the compressed thermal contact portion is in close contact with the surface of the corresponding battery cell.

[0033] In the battery pack provided in this application, the corresponding thermal contact portion is squeezed by the limiting member so that the thermal contact portion on the opposite side of the squeezed thermal contact portion is in close contact with the corresponding cell surface, reducing the risk of the thermal contact portion detaching from the cell surface, thereby reducing the dry burning phenomenon of the temperature control component, and thus enabling the temperature control component to exchange heat with the cell more efficiently, improving the heat transfer efficiency between the temperature control component and the cell.

[0034] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0035] like Figure 1 and Figure 2 As shown in the embodiment of this application, an energy storage device 200 is provided. The energy storage device 200 includes a housing 201 and a battery pack 100. The battery pack 100 is disposed inside the housing 201, and the housing 201 is used to protect the battery pack 100. The energy storage device 200 can store electrical energy in the battery pack 100 and supply power to electrical appliances in scenarios where electrical energy is needed, such as outdoor scenarios or home scenarios. In home scenarios, the energy storage device 200 can be installed on balconies or other places to be used in conjunction with solar panels installed outside the balcony railing or on the roof.

[0036] like Figures 3 to 5As shown, the battery pack 100 includes a support 10, multiple battery cells 20, and a temperature regulating component 30. The multiple battery cells 20 are arrayed on the support 10. The temperature regulating component 30 is wound around each of the battery cells 20, and each side of the temperature regulating component 30 has a thermal contact portion 40. The temperature regulating component 30 contacts each battery cell 20 through the thermal contact portions 40, allowing for heat exchange between the temperature regulating component 30 and each battery cell 20. For example, when the temperature of a battery cell 20 is low, the temperature regulating component 30 can heat the battery cell 20; or when the temperature of a battery cell 20 is high, the temperature regulating component 30 can cool the battery cell 20, so that the battery cell 20 can operate normally. Exemplarily, the temperature regulating component 30 is in the form of a film, such as a heating film, or it is in the form of a plate, such as a liquid cooling plate; the thermal contact portions 40 are made of a thermally conductive material, such as thermally conductive silicone.

[0037] The bracket 10 has multiple limiting members 50, which are staggered on opposite sides of the temperature control assembly 30. Each limiting member 50 is used to press the corresponding thermal contact portion 40 so that the thermal contact portion 40 on the opposite side of the pressed thermal contact portion 40 is in close contact with the surface of the corresponding battery cell 20. Under the action of the limiting member 50, the thermal contact portion 40 is always in close contact with the surface of the battery cell 20, reducing the risk of the thermal contact portion 40 detaching from the surface of the battery cell 20. This allows the temperature control assembly 30 to exchange heat with the battery cell 20 more efficiently, improving the heat transfer efficiency between the temperature control assembly 30 and the battery cell 20. It should be noted that, in each case where the limiting member 50 presses against the corresponding thermal contact portion 40, the thermal contact portion 40 corresponding to the limiting member 50 refers to the thermal contact portion 40 of the temperature regulating component 30 on the same side as the limiting member 50 and closest to the limiting member 50; in cases where the thermal contact portion 40 is in close contact with the surface of the corresponding battery cell 20, the thermal contact portion 40 corresponding to the surface of the battery cell 20 refers to the thermal contact portion 40 of the temperature regulating component 30 on the same side as the battery cell 20 and closest to the battery cell 20. For example, when the temperature regulating component 30 heats the battery cell 20, since the thermal contact portion 40 is always in close contact with the surface of the battery cell 20 under the action of the limiting member 50, the dry burning phenomenon caused by the temperature regulating component 30 detaching from the surface of the battery cell 20 is reduced. This allows the temperature regulating component 30 to transfer heat to the battery cell 20 more efficiently and also reduces the risk of local overheating caused by the dry burning phenomenon of the temperature regulating component 30.

[0038] In some embodiments, such as Figure 4 and Figure 5As shown, each battery cell 20 is a cylindrical battery cell. Multiple battery cells 20 are parallel in axis and arranged to form a multi-layer battery cell layer 21. The multi-layer battery cell layer 21 is stacked along a first direction X. Multiple battery cells 20 in each battery cell layer 21 are arranged along a second direction Y, which is perpendicular to the first direction X. Multiple battery cells 20 in adjacent battery cell layers 21 are staggered. A temperature regulating component 30 is wound between adjacent battery cell layers 21, enabling the temperature regulating component 30 to simultaneously perform heat exchange on multiple battery cells 20 in adjacent battery cell layers 21. Multiple limiting members 50 are disposed in adjacent battery cell layers 21, and each battery cell 20 corresponds to one limiting member 50 along the first direction X. Each limiting member 50 presses the thermal contact portion 40 towards the corresponding battery cell 20, causing the thermal contact portion 40 to adhere tightly to the surface of the corresponding battery cell 20.

[0039] In some embodiments, such as Figure 5 As shown, the distance L1 between two adjacent cells 20 in each cell layer 21 is equal to the distance L2 between two staggered adjacent cells 20 in two adjacent cell layers 21, i.e., L1=L2. This makes the arrangement of multiple cells 20 more regular, and also allows multiple limiting members 50, temperature regulating components 30 and thermal contact parts 40 to be set more regularly. This not only facilitates production and assembly, but also makes the contact area between each cell 20 and the thermal contact part 40 the same in length along the circumference of the cell 20. Especially when the axial length of each cell 20 is the same, the contact area between each cell 20 and the thermal contact part 40 is the same, thereby making the heat exchange between the temperature regulating component 30 and multiple cells 20 more uniform.

[0040] In some embodiments, such as Figures 6 to 8 As shown, each limiting member 50 has a limiting groove 51 on the side facing the corresponding cell 20. The limiting groove 51 is used to accommodate at least a portion of the thermal contact portion 40. The groove surface of the limiting groove 51 can limit and compress the thermal contact portion 40, thereby positioning the thermal contact portion 40 by the limiting member 50 to improve the positional stability of the thermal contact portion 40 relative to the cell 20.

[0041] In some embodiments, such as Figures 7 to 9 As shown, each limiting member 50 forms two limiting protrusions 52 on opposite sides of the limiting groove 51. The thermal contact part 40 is provided with a relief groove 41 corresponding to the position of the limiting protrusion 52. The relief groove 41 is used to accommodate at least part of the limiting protrusion 52 to play a role in relief, so that the thermal contact part 40 can enter the limiting groove 51 more fully for the limiting member 50 to squeeze.

[0042] In some embodiments, such as Figures 7 to 9As shown, each limiting member 50 includes two extension arms 53. One end of one extension arm 53 is connected to one end of the other extension arm 53, and the other ends of one extension arm 53 extend away from the other ends of the other extension arm 53. Each of the two distant ends of the two extension arms 53 has a notch 531 opposite to the other, and the two notches 531 and the space between them form a limiting groove 51. Each extension arm 53 has a limiting protrusion 52 on the side of its notch 531 facing away from the other extension arm 53. The two extension arms 53 simplify the structure of the limiting member 50 and reduce its weight. Especially in embodiments where the limiting member 50 is integrally formed with the bracket 10, the two extension arms 53 also save molding material, thereby reducing costs.

[0043] Understandably, in some other embodiments, the limiting member 50 may also be a triangular structure, with the limiting groove 51 and the two limiting protrusions 52 all located on one side of the triangular structure. The limiting member 50 can improve the structural strength through the triangular structure, thereby improving the positional stability of the thermal contact 40 relative to the battery cell 20.

[0044] In some embodiments, such as Figure 8 and Figure 9 As shown, the thermal contact portion 40 forms a first pressing portion 42 between each pair of adjacent clearance grooves 41 and within each limiting groove 51. The thermal contact portion 40 forms a second pressing portion 43 between each pair of adjacent clearance grooves 41 and outside each limiting groove 51. The first pressing portion 42 and the second pressing portion 43 are alternately provided on both sides of the temperature regulating assembly 30, with the first pressing portion 42 on one side corresponding to the second pressing portion 43 on the other side. Each second pressing portion 43 corresponds to a battery cell 20 and is used to tightly adhere to the surface of the battery cell 20. The first pressing portion 42 is used to be pressed by the limiting member 50 so that the corresponding second pressing portion 43 on the other side is tightly adhered to the surface of the battery cell 20.

[0045] Furthermore, such as Figure 8 and Figure 9 As shown, when L1=L2, the lengths of the first extrusion portions 42 on both sides of the temperature control assembly 30 along the circumferential direction of the cell 20 are the same, and the lengths of the second extrusion portions 43 along the circumferential direction of the cell 20 are the same. The length of the first extrusion portion 42 is less than the length of the second extrusion portion 43. The first extrusion portions 42 and the second extrusion portions 43 on both sides of the temperature control assembly 30 are symmetrically arranged along the plane M. The plane M is parallel to the first direction X and perpendicular to the second direction Y. Each limiting member 50 is located between three staggered adjacent cells 20, so that multiple cells 20 can be arranged more compactly to reduce the overall volume.

[0046] Further optional, such as Figure 5 , Figure 8 and Figure 9 As shown, the diameter of each battery cell 20 is D±a, the vertical distance between the axis of the battery cell 20 and the groove surface of the limiting groove 51 is L3, the thickness of the temperature regulating component 30 is T1, and the thickness of the thermal contact portion 40 on both sides of the temperature regulating component 30 is T2. Then, the minimum compression amount W of the portion W of the thermal contact portion 40 within the limiting groove 51 is... min for:

[0047] W min =(2*T2+T1-(L3-(Da) / 2) / (2*T2);

[0048] Maximum extrusion W max for:

[0049] W max =(2*T2+T1-(L3-(D+a) / 2) / (2*T2);

[0050] Among them, the minimum extrusion amount W min >0, preferably, W min >10% to ensure that the thermal contact portion 40 is subjected to sufficient compression, so as to ensure that the thermal contact portion 40 is in close contact with the surface of the battery cell 20.

[0051] Furthermore, since the multiple cells 20 are arranged compactly, the thermal contact portion 40 can also be compressed between two adjacent staggered cells 20. Therefore, the minimum compression amount S of the thermal contact portion 40 between two adjacent staggered cells 20 is... min for:

[0052] S min =(2*T2+T1-(L2-(Da)) / (2*T2);

[0053] Maximum extrusion amount S max for:

[0054] S max =(2*T2+T1-(L2-(D+a)) / (2*T2);

[0055] Among them, the minimum extrusion amount S min >0, preferably, S min >10% to ensure that the thermal contact portion 40 is subjected to sufficient compression, so as to ensure that the thermal contact portion 40 is in close contact with the surface of the battery cell 20.

[0056] In some embodiments, the thermal contact portion 40 is a silicone pad with a hardness of approximately Shore C 22-30, where Shore C is a Shore hardness unit.

[0057] In some embodiments, such as Figure 5As shown, two adjacent cell layers 21 form a double-layer cell unit 22. Temperature regulating components 30 are disposed between adjacent cell layers 21 in each double-layer cell unit 22. A gap 23 exists between adjacent double-layer cell units 22 to prevent the phenomenon of temperature regulating components 30 being disposed on both sides of a cell layer 21, thereby reducing the risk of overheating of a cell layer 21. For example, the width of the gap 23 is L4, where L4 > L1 - (Da).

[0058] In some embodiments, such as Figure 5 and Figure 10 As shown, the bracket 10 has a fixing part 11 on at least one side of the cell layer 21 along the second direction Y. The fixing part 11 is used to fix the end of the temperature regulating component 30 to the bracket 10. The fixing part 11 includes a bonding surface 111 and a positioning surface 112. The positioning surface 112 is perpendicular to the bonding surface 111. The end of the temperature regulating component 30 is bonded to the bonding surface 111 and abuts against the positioning surface 112. The bonding surface 111 is used to fix the end of the temperature regulating component 30, and the positioning surface 112 is used to position the temperature regulating component 30 relative to the bonding surface 111 to improve the accuracy of the bonding position. For example, the bonding surface 111 and the temperature regulating component 30 are bonded together with double-sided adhesive.

[0059] Optionally, when the temperature control component 30 is a heating film, the bracket 10 has a fixing part 11 on each of the opposite sides of the cell layer 21 along the second direction Y. The contact surface 111 in the fixing part 11 on one side is a plane, and the contact surface 111 in the fixing part 11 on the other side is a curved surface (e.g., Figure 10 As shown, the flat bonding surface 111 extends along the outer periphery of the cell 20 to facilitate bonding the end of the heating film with the wire harness interface, and the curved bonding surface 111 is used to bond the other end of the heating film without the wire harness interface, so that the heating film can better bond to the outermost cell 20 of the cell layer 21.

[0060] In some embodiments, such as Figure 3 and Figure 4 As shown, the support 10 includes a first frame 12 and a second frame 13. The first frame 12 and the second frame 13 are spliced ​​together along the axial direction of the battery cell 20 to form the support 10. Multiple battery cells 20 are disposed between the first frame 12 and the second frame 13. The battery pack 100 also includes a circuit board 60. The circuit board 60 is disposed on one side of the first frame 12 and the second frame 13 perpendicular to the axial direction of the battery cell 20, so that the circuit board 60 is further away from the temperature control component 30, reducing the heat radiation received by the circuit board 60 and improving the operational stability of the circuit board 60.

[0061] For example, the circuit board 60 is used to monitor the status of the battery cell 20, reduce the risk of overcharging and over-discharging of the battery cell 20, and extend the service life of the battery cell 20. The temperature control component 30 is electrically connected to the circuit board 60, so that the circuit board 60 can collect the temperature of the temperature control component 30 and adjust the temperature of the temperature control component 30 in real time.

[0062] Furthermore, in other related technologies, the heating film in the battery pack is generally located at the end of the battery cell. However, since the end of the battery cell usually has a cell explosion-proof valve, the heating film can easily block the explosion-proof valve, causing safety problems. At the same time, placing the heating film at the end of the battery cell can cause the two ends of the battery cell to overheat and the middle to become too cold, resulting in an excessive temperature difference between the end and the middle of the battery cell. In the battery pack 100 provided in this application, the temperature regulating component 30 is wound around each battery cell 20, allowing the temperature regulating component 30 to heat the outer periphery of the battery cell 20. This replaces the method of heating the end of the battery cell 20 by the temperature regulating component 30 in other related technologies. This not only reduces the phenomenon of excessive temperature difference between the end and the middle of the battery cell 20, but also allows the temperature regulating component 30 to avoid the explosion-proof valve, thereby improving safety.

[0063] Furthermore, those skilled in the art should recognize that the above embodiments are merely illustrative of this application and are not intended to limit this application. Any appropriate changes and variations made to the above embodiments within the essential spirit and scope of this application fall within the scope of this application's disclosure.

Claims

1. A battery pack, characterized by, The application relates to a battery, which comprises: a bracket; a plurality of battery cells arranged in an array on the bracket; and a temperature regulating assembly, which is wound around each of the battery cells and has a thermal contact part on each side of the temperature regulating assembly; wherein the bracket is provided with a plurality of limiting members, the limiting members are arranged alternately on the two sides of the temperature regulating assembly, and are configured to press the corresponding thermal contact part so that the thermal contact part on the side opposite to the pressed thermal contact part is tightly attached to the surface of the corresponding battery cell. Each of the limiting members is provided with a limiting groove and a limiting protrusion formed on the opposite sides of the limiting groove, the limiting groove accommodates at least part of the thermal contact part, the groove surface of the limiting groove limits and presses the thermal contact part, and the thermal contact part is provided with an avoiding groove corresponding to the position of the limiting protrusion, the avoiding groove accommodates at least part of the limiting protrusion.

2. The battery pack of claim 1, wherein: Each of the limiting members comprises two extension arms, one end of one of the extension arms is connected to one end of the other extension arm, the other end of one of the extension arms extends away from the other end of the other extension arm, the two ends of the two extension arms away from each other are oppositely provided with notches, the two notches and the space between the two notches form the limiting groove, and the limiting protrusion is formed on the side of each of the extension arms away from the other extension arm.

3. The battery pack of claim 2, wherein: The part of the thermal contact part in each of the limiting grooves forms a first pressing part, the part of the thermal contact part between two adjacent avoiding grooves and outside the limiting groove forms a second pressing part, the first pressing part and the second pressing part are alternately arranged on the two sides of the temperature regulating assembly, the first pressing part on one side corresponds to the second pressing part on the other side, each of the second pressing parts corresponds to one of the battery cells, and the first pressing part is pressed by the limiting member so that the corresponding second pressing part is tightly attached to the surface of the battery cell.

4. The battery pack of claim 2, wherein: The plurality of battery cells are axially parallel, the plurality of battery cells are arranged to form a plurality of battery cell layers, the plurality of battery cell layers are stacked along a first direction, the plurality of battery cells in each of the battery cell layers are arranged along a second direction, the second direction is perpendicular to the first direction, the plurality of battery cells in two adjacent battery cell layers are arranged alternately, and the temperature regulating assembly is wound between two adjacent battery cell layers.

5. The battery pack of any one of claims 1 to 4, wherein: The distance between two adjacent battery cells in each of the battery cell layers is equal to the distance between two alternately adjacent battery cells in two adjacent battery cell layers, and the contact area between each of the battery cells and the thermal contact part has the same length along the circumferential direction of the battery cell.

6. The battery pack of claim 5, wherein: Two adjacent battery cell layers form a double-layer battery cell unit, the temperature regulating assembly is arranged between two adjacent battery cell layers in each of the double-layer battery cell units, and there is a gap between two adjacent double-layer battery cell units.

7. The battery pack of claim 5, wherein: ​ 8. The battery pack of any one of claims 1 to 4, wherein: The support is provided with a fixing part, the fixing part comprises a fitting surface and a positioning surface, the fitting surface is a plane or a curved surface extending along the outer circumferential side of the battery cell, the positioning surface is perpendicular to the fitting surface, the end of the temperature adjusting assembly fits the fitting surface and abuts against the positioning surface, and the positioning surface is used for positioning the position of the temperature adjusting assembly relative to the fitting surface.

9. The battery pack of any one of claims 1 to 4, wherein: The support comprises a first support body and a second support body, the first support body and the second support body are spliced along the axial direction of the battery cell to form the support, a plurality of battery cells are arranged between the first support body and the second support body, and the battery pack further comprises a circuit board, the circuit board is arranged on one side of the first support body and the second support body which is perpendicular to the axial direction of the battery cell.

10. An energy storage device, characterized by: The energy storage device comprises an inverter module and the battery pack as claimed in any one of claims 1 to 9, and the inverter module is electrically connected with the plurality of battery cells.

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