Energy storage device

Abstract

The present invention provides an energy storage device. The energy storage device includes a housing, a plurality of battery modules, At least one Cooling Assembly and At least one The battery module is housed in a housing including a heat insulating holder. At least one cooling assembly includes a plurality of It is provided between the battery modules. At least one The insulation holder is fixed to the housing. ,cold The heat insulating holder is provided with a fixing groove for fixing the cooling assembly. In the energy storage device according to the embodiment of the present application, the heat insulating holder is provided to realize the fixing of the cooling assembly and reduce the heat exchange between the cooling assembly and the housing. On the one hand, the cooling effect and cooling efficiency of the cooling assembly can be improved. On the other hand, the local temperature of the housing can be prevented from being too low and condensation can be avoided on the housing, thereby improving safety and preventing the local temperature of the battery module from being too low, thereby improving the temperature uniformity among the battery cells in one battery module and the temperature uniformity among the battery modules.

Description

Technical Field

[0001] Reference to Related Applications This application claims priority to Chinese Patent Application No. 202211438939.7, filed on November 17, 2022, with the invention title "Energy Storage Device", and all of its contents are incorporated herein by reference.

[0002] The present invention relates to the technical field of batteries, and particularly to an energy storage device.

Background Art

[0003] In the related art, a plurality of battery modules are provided in an energy storage device. A cooling assembly can be provided between adjacent battery modules. Cooling of the battery modules is achieved by a cooling assembly located on the side of the battery modules.

[0004] However, in order to achieve lateral fixation of the cooling assembly, it is common to fix the end of the cooling assembly to the side plate of the battery module. This not only causes heat transfer between the cooling assembly and the side plate, and between the side plate and the battery housing in contact therewith, affecting the heat dissipation efficiency of the cooling assembly for the battery modules, but also leads to a temperature mismatch between the battery cells in the region close to the side plate and the battery cells in other regions within the battery module, resulting in a larger temperature difference within the battery module.

Summary of the Invention

[0005] The present invention aims to solve at least one of the technical problems in the prior art. Therefore, one object of the present invention is to provide an energy storage device in which the internal temperature distribution of the battery modules within the energy storage device is more uniform and the cooling efficiency of the cooling assembly within the energy storage device is even higher.

[0006] An energy storage device according to an embodiment of the first aspect of the present invention includes a housing, a plurality of battery modules, At least one a cooling assembly and At least oneIt includes a heat insulation holder. A plurality of battery modules are housed in a housing. At least one cooling assembly includes a plurality of It is provided between the battery modules. At least one The heat insulation holder is fixed to the housing, and a fixing groove for fixing the cooling assembly is formed in the heat insulation holder. ... cold

[0007] The energy storage device according to an embodiment of the present invention can realize the fixation of the cooling assembly and reduce the heat exchange between the cooling assembly and the housing by providing a heat insulation holder. On the other hand, the cooling effect and cooling efficiency of the cooling assembly can be improved. On the other hand, by avoiding the local temperature of the housing being too low and avoiding condensation in the housing, the safety can be enhanced, and by avoiding the local temperature of the battery module being too low, the temperature uniformity between a plurality of battery cells in one battery module and the temperature uniformity between a plurality of battery modules can be improved.

[0008] According to some embodiments of the present invention, the housing includes a bottom plate and side plates. The bottom plate has cross beams and longitudinal beams perpendicular to each other. The longitudinal beams are parallel to the longitudinal direction of the battery module, and the cross beams are parallel to the width direction of the battery module. The bottom plate and the side plates surround to form the housing. The heat insulation holder is provided on the cross beams and longitudinal beams. By improving the fixing stability of the heat insulation holder in the housing, the fixing stability of the heat insulation holder for the cooling assembly can be improved, and the cooling assembly can be separated from the side plates to further reduce the heat exchange between the housing and the cooling assembly.

[0009] According to some embodiments of the present invention, the heat insulation holder includes a fixing segment, a position limiting segment, and a connecting segment. The fixing segment is located on one side of the cross beam and fixed to the longitudinal beam, and a fixing groove is formed at the top of the fixing segment. The position limiting segment is located on the other side of the cross beam. One end of the connecting segment is connected to the fixing segment, the other end of the connecting segment is connected to the position limiting segment, and the connecting segment is supported by the cross beam.

[0010] In this way, by providing the heat insulation holder, on the one hand, by forming the heat insulation holder as a triangular support member, the fixing stability and reliability of the cooling assembly in the housing can be improved. On the other hand, the heat exchange between the side plate and the cooling assembly can be reduced, the cooling effect and cooling efficiency of the cooling assembly can be improved, and the local temperature of the housing can be prevented from being too low, ensuring the uniformity of the temperature distribution of the battery module, avoiding the temperature difference in the battery module from being too large, and improving the operating stability and use safety of the energy storage device.

[0011] Furthermore, positioning protrusions are formed at the bottom of the fixing segment, positioning holes are formed in the vertical beam, and the positioning protrusions are inserted into the positioning holes, further improving the fixing stability and reliability of the heat insulation holder in the housing.

[0012] Furthermore, the top of the fixing groove and the side away from the connecting segment of the fixing groove are opened, facilitating the insertion of the cooling assembly and improving the convenience of installation.

[0013] Optionally, chamfers are formed at the openings of the fixing grooves. The chamfers guide the assembly, further improving the convenience of attaching the cooling assembly to the heat insulation holder.

[0014] In some embodiments, the groove walls of the fixing groove located on both sides of the cooling assembly have the same thickness, so that the force distribution on both sides of the heat insulation holder in the width direction becomes more uniform, improving the fixing stability and the structural strength and stability of the heat insulation holder.

[0015] According to some embodiments of the present invention, the position limiting segment includes a main body portion, a first reinforcing plate and TwoIt includes a second reinforcing plate. The main body is located between the cross beam and the side plate of the housing. One end of the main body abuts against the cross beam, and the other end of the main body abuts against the side plate. The main body is perpendicular to the connecting segment. The first reinforcing plate is provided on the main body. The first reinforcing plate is connected to the connecting segment and is in the same plane as the connecting segment. Among the two second reinforcing plates, one second reinforcing plate is provided on one side of the first reinforcing plate, and the other second reinforcing plate is provided on the other side of the first reinforcing plate. The two second reinforcing plates intersect perpendicularly with the first reinforcing plate, and the two second reinforcing plates are symmetrically provided with respect to the first reinforcing plate.

[0016] In this way, the structural strength of the heat insulation holder can be improved, and the fixing stability and reliability of the position limiting segment on the bottom plate can be further improved.

[0017] According to some embodiments of the present invention, in the longitudinal direction of the battery module ... cold At least one end of the cooling assembly is fixed in the fixing groove of the heat insulation holder, so that the heat insulation holder realizes stable and reliable fixing of the cooling assembly in the housing.

[0018] Furthermore, the energy storage device includes a plurality of cooling assemblies. Each cooling assembly is provided between two adjacent battery modules. The energy storage device includes a plurality of heat insulation holders. In the longitudinal direction of the battery module, heat insulation holders are provided at both ends of each cooling assembly respectively. In the longitudinal direction of the battery module, both ends of each cooling assembly are respectively fixed in the fixing grooves of the heat insulation holders.

[0019] Furthermore, the energy storage device includes a plurality of cooling assemblies. In the longitudinal direction of the battery module, a bus plate is provided at the ends on the same side of the plurality of cooling assemblies. The plurality of cooling assemblies are communicated by the bus plate.

[0020] Optionally, the fixing segment, the connecting segment and the position limiting segment are integrally formed.

[0021] Additional aspects and advantages of the present invention are partially described in the following content, some will become apparent from the following description, or can be understood through the practice of the present invention. The above and / or additional aspects and advantages of the present invention will become apparent and be more easily understood from the description of the embodiments with reference to the following drawings.

Brief Description of the Drawings

[0022]

Figure 1

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Figure 8

Modes for Carrying Out the Invention

[0023] Hereinafter, embodiments of the present invention will be described in detail. Examples of the embodiments are shown in the drawings. The same or similar symbols indicate the same or similar elements, or elements having the same or similar functions, from the beginning to the end. Hereinafter, the embodiments described with reference to the drawings are exemplary and are only used to explain the present invention and should not be understood as limiting the present invention.

[0024] Hereinafter, with reference to FIGS. 1 to 8, an energy storage device 100 and power usage equipment according to an embodiment of the present invention will be described.

[0025] As shown in FIGS. 1, 2, 3, 4, and 5, the energy storage device 100 in the first aspect of the present invention includes a housing 10, a plurality of battery modules 20, At least one a cooling assembly 30, and At least one a heat insulation holder 40.

[0026] The plurality of battery modules 20 are provided in the housing 10 and are sequentially provided along the width direction of the housing 10. At least one The cooling assembly 30 is A plurality of provided between the battery modules 20. By positioning the cooling assembly 30 on the side of the battery modules 20, cooling of two adjacent battery modules 20 is realized by two side surfaces of one cooling assembly 30, thereby improving the cooling efficiency. At least one The heat insulation holder 40 is fixed to the housing 10, and the heat insulation holder 40 has ... cold a fixing groove 411 for fixing the cooling assembly 30. By fixing the cooling assembly 30 with the heat insulation holder 40, the stability and reliability of the cooling assembly 30 in the housing 10 can be improved. Further, the heat insulation holder 40 can reduce the heat exchange between the housing 10 and the cooling assembly 30, realize effective heat insulation, reduce the cooling loss of the cooling assembly 30, and enhance the cooling efficiency and cooling effect. Also, by avoiding the temperature of the housing 10 being too low and the local temperature of the battery module 20 being lower than other regions, the temperature uniformity of the battery module 20 can be made better.

[0027] The energy storage device 100 according to an embodiment of the present invention can fix the cooling assembly 30 by providing the heat insulation holder 40, and can reduce the heat exchange between the cooling assembly 30 and the housing 10. On the other hand, the cooling effect and cooling efficiency of the cooling assembly 30 can be improved. On the other hand, by avoiding the local temperature of the housing 10 being too low and avoiding condensation in the housing 10, the safety can be enhanced, and by avoiding the local temperature of the battery module 20 being too low, the temperature uniformity between a plurality of battery cells in one battery module 20 and the temperature uniformity between a plurality of battery modules 20 can be improved.

[0028] As shown in FIGS. 3, 5, and 7, the housing 10 includes a bottom plate 11 and side plates 12. The bottom plate 11 has cross beams 111 and longitudinal beams 112 that are perpendicular to each other. The longitudinal beam 112 is parallel to the longitudinal direction of the battery module 20, and the cross beam 111 is parallel to the width direction of the battery module 20. The longitudinal direction of the battery module 20 is the longitudinal direction of the housing 10, and the width direction of the battery module 20 is the width direction of the housing 10. The bottom plate 11 and the side plates 12 surround to form the housing 10. The heat insulation holder 40 is provided on the cross beams 111 and the longitudinal beams 112.

[0029] Specifically, the longitudinal beam 112 extends along the longitudinal direction of the battery module 20 ... The cross beam 111 is and extends along the width direction of the battery module 20. A storage space is defined between the longitudinal beam 112 and the cross beam 111, and one battery module 20 can be provided in each storage space. The battery module 20 is fixed to the cross beam 111 and the longitudinal beam 112. Further, by providing the heat insulation holder 40 on the cross beam 111 and the longitudinal beam 112, the fixing stability of the heat insulation holder 40 in the housing 10 is improved, so that the fixing stability of the cooling assembly 30 by the heat insulation holder 40 is improved, and the cooling assembly 30 and the side plate 12 are separated, and the heat exchange between the housing 10 and the cooling assembly 30 can be further reduced.

[0030] According to some embodiments of the present invention, the heat insulation holder 40 includes a fixed segment 41, a position limiting segment 42, and a connecting segment 43. The fixed segment 41 is located on one side of the cross beam 111 and fixed to the longitudinal beam 112. A fixed groove 411 is formed at the top of the fixed segment 41. The position limiting segment 42 is located on the other side of the cross beam 111. One end of the connecting segment 43 is connected to the fixed segment 41, and the other end of the connecting segment 43 is connected to the position limiting segment 42. The connecting segment 43 is supported by the cross beam 111.

[0031] Specifically, as shown in FIGS. 4 and 8, the heat insulation holder 40 includes a connecting segment 43, a fixed segment 41, and a position limiting segment 42. The fixed segment 41 and the position limiting segment 42 are located at both ends of the connecting segment 43. The fixed segment 41 extends along the longitudinal direction of the housing 10, and the position limiting segment 42 extends along the width direction of the housing 10. Both the fixed segment 41 and the position limiting segment 42 are fixed to the bottom plate 11 of the housing 10. The position limiting segment 42 abuts against the side plate 12 of the housing 10, so as to separate the side plate 12 of the housing 10 from the cooling assembly 30.

[0032] In this way, in the height direction, the contour of the projection of the heat insulation holder 40 is in a T shape or a cross shape, and the fixed segment 41 and the position limiting segment 42 realize the three-point support or four-point support of the heat insulation holder 40 on the housing 10, improving the fixing stability and reliability of the heat insulation holder 40 on the housing 10, and improving the fixing stability and reliability of the cooling assembly 30 by the heat insulation holder 40.

[0033] Furthermore, the position limiting segment 42 is fixed to the bottom plate 11, and at least a part of it extends towards the side plate 12 at one end in the longitudinal direction of the housing 10 and abuts against the side plate 12.

[0034] As shown in FIGS. 4 and 5, the fixed segment 41 ... of the cross beam 111 is located on one side, and the position limiting segment 42 is on the cross beam 11 ... One cross beam 111 on the other side.

[0035] Specifically ... The cross beam 111 is is provided on the bottom plate 11, extends along the width direction of the housing 10, and is spaced apart from the side plate 12 in the longitudinal direction of the housing 10 ... The cooling assembly 30 is is provided in the housing 10 and has an end ... fixed to the fixed segment 41 By being fixed, the fixing stability within the housing 10 is improved. The connecting segment 43 is configured as a plate body ... of the cooling assembly 30 extends along the longitudinal direction of the housing 10 so as to straddle, that is, in the height direction of the housing 10 ... the cross beam 111 and faces directly. The fixing segment 41 and the position limiting segment 42 are ... to the cross beam 111 located on both sides and are ... of the cross beam 111 connected to the bottom plate 11 on both sides ... Two cross beams 111 Thereby, by restricting the position of the heat insulation holder 40, the sway of the heat insulation holder 40 in the longitudinal direction of the housing 10 is avoided, and the fixing stability and reliability of the heat insulation holder 40 and the cooling assembly 30 in the housing 10 are improved. ... To the cross beam 111 By restricting the position of the heat insulation holder 40, the sway of the heat insulation holder 40 in the longitudinal direction of the housing 10 is avoided, and the fixing stability and reliability of the heat insulation holder 40 and the cooling assembly 30 in the housing 10 are improved.

[0036] The energy storage device 100 according to the embodiment of the present invention is provided with a heat insulation holder 40. On the one hand, by forming the heat insulation holder 40 as a triangular support member, the fixing stability and reliability of the cooling assembly 30 in the housing 10 can be improved. On the other hand, the heat exchange between the side plate 12 and the cooling assembly 30 can be reduced, the cooling effect and cooling efficiency of the cooling assembly 30 can be improved, the local temperature of the housing 10 being too low can be avoided, the uniformity of the temperature distribution of the battery module 20 can be ensured, the temperature difference within the battery module 20 being too large can be avoided, and the operation stability and use safety of the energy storage device 100 can be improved.

[0037] Note that the heat insulation holder 40 is made of an insulating and heat insulating material. The heat insulation holder 40 can reduce the heat exchange between the side plate 12 and the cooling assembly 30, has good insulation performance, and can also meet the requirements of the electrical protection level of the energy storage device 100.

[0038] Figures 7 and 8In the embodiment shown, a positioning protrusion 412 is formed at the bottom of the fixed segment 41, and a positioning hole 1121 is formed in the vertical beam 112.

[0039] An insulating plate can be provided between the bottom plate 11 of the housing 10 and the battery module 20. When the vertical beam 112 is formed on the insulating plate and the positioning hole 1121 is formed in the insulating plate, insulation between the battery module 20 and the bottom plate 11 can be realized, and the safety of the energy storage device 100 can be improved. The insulating plate is laid on the bottom plate 11, and the positioning protrusion 41 ... 2 is in the position Positioning hole 112 ... inserted into 1, and The fixed segment 41 can be fixed to the bottom plate 11. While realizing stable fixation of the heat insulation holder 40 on the insulating plate, the combination of the positioning protrusion 412 and the positioning hole 1121 also has a positioning effect, and the sway of the heat insulation holder 40 can be avoided.

[0040] The positioning structure of the embodiment of the present invention is not limited to this. In some other embodiments, a positioning hole 1121 can be provided in the fixed segment 41, and correspondingly, a positioning protrusion 412 can be provided on the insulating plate or the bottom plate 11. In order to improve the convenience of assembly, a guide surface extending obliquely can be provided on the circumferential side surface of the positioning protrusion 412 and / or the side wall of the positioning hole 1121, so that the assembly can be better guided during the assembly process.

[0041] As shown in FIGS. 6 and 8, in some embodiments, a fixing groove 411 is formed at the top of the fixed segment 41, and the top of the fixing groove 411 and one side away from the connecting segment 43 of the fixing groove 411 are opened, facilitating the insertion of the cooling assembly 30.

[0042] Specifically, two mounting plates are provided at the top of the fixed segment 41 414 are provided, and the two mounting plates 414 define the fixing groove 411. The cooling assembly 30 is mounted in the fixing groove 411, that is, the two mounting plates 414It sandwiches and fixes the cooling assembly 30 at both ends of the cooling assembly 30. Thereby, not only the stable fixation of the cooling assembly 30 is realized, but also the cooling assembly 30 can be provided vertically along the height direction, and the position regulation in the vertical direction with respect to the cooling assembly 30 can be realized. Therefore, the cooling effects on the battery modules 20 on both sides thereof by the cooling assembly 30 can be made consistent, the uniformity of the temperature distribution among the plurality of battery modules 20 can be enhanced, local overheating phenomena can be avoided, and the operation stability of the energy storage device 100 can be improved.

[0043] Two mounting plates 414 Each of them has one end connected to the connecting segment 43, and the free ends of the two mounting plates 414 are separated, opening the top and one side of the fixing groove 411, which improves the convenience of attaching the cooling assembly 30 to the heat insulation holder 40.

[0044] As can be understood, the two mounting plates that define the fixing groove 411 ... the distance between the outer surfaces of 414 are consistent with the distance between adjacent battery modules 20. By making the gaps between adjacent battery modules 20 consistent and making the size of the gaps reasonable, the uniformity of the adhesive injection can be guaranteed, and the consistency of the thickness of the injected adhesive can be made better.

[0045] Furthermore, a chamfer 413 is formed at the opening of the fixing groove 411, which guides the assembly by the chamfer 413 and further improves the convenience of attaching the cooling assembly 30 to the heat insulation holder 40.

[0046] In some embodiments, the side walls of the fixing groove 411 located on both sides of the cooling assembly 30 have equal thicknesses, that is, the thicknesses of the two mounting plates 414 are equal. Thereby, the force distribution on both sides of the heat insulation holder 40 in the width direction becomes more uniform, improving the stability of the fixation and also improving the structural strength and stability of the heat insulation holder 40.

[0047] As shown in FIG. 8, according to some embodiments of the present invention, the position limiting segment 42 includes a main body portion 421, a first reinforcing plate 422 andTwo It includes a second reinforcing plate 423. The main body portion 421 is located between the cross beam 111 and the side plate 12 of the housing 10. One end of the main body portion 421 abuts against the cross beam 111, and the other end of the main body portion 421 abuts against the side plate 12. The main body portion 421 is perpendicular to the connecting segment 43. The first reinforcing plate 422 is provided on the main body portion 421. The first reinforcing plate 422 is connected to the connecting segment 43 and is in the same plane as the connecting segment 43. Among the two second reinforcing plates 423, one second reinforcing plate 423 is provided on one side of the first reinforcing plate 422, and the other second reinforcing plate 423 is provided on the other side of the first reinforcing plate 422. The two second reinforcing plates 423 intersect perpendicularly with the first reinforcing plate 422, and the two second reinforcing plates 423 are symmetrically provided with respect to the first reinforcing plate 422.

[0048] Specifically, the main body portion 421 extends along the width direction of the battery module 20. A reinforcing flange can be provided on the upper side of the main body portion 421, and an abutting plate extending towards the bottom plate 11 can be provided on the lower side of the main body portion 421. Thereby, the main body portion 421 is provided between the cross beam 111 and the side plate 12. One end of the first reinforcing plate 422 is connected to the connecting segment 43, and the first reinforcing plate 422 extends along the longitudinal direction of the battery module 20. Two The second reinforcing plate 423 is Each Located on both sides of the first reinforcing plate 422 and extends along the width direction of the battery module 20. Thereby, the structural strength of the heat insulation holder 40 can be enhanced, and the fixing stability and reliability of the position limiting segment 42 on the bottom plate 11 can be further improved.

[0049] Note that in the longitudinal direction of the battery module 20 ... cold At least one end of the cooling assembly 30 is fixed in the fixing groove 411 of the heat insulation holder 40. Therefore, the heat insulation holder 40 realizes the stable and reliable fixing of the cooling assembly 30 in the housing 10.

[0050] Exemplarily, in some embodiments, the energy storage device 100 includes a plurality of cooling assemblies 30. Each cooling assembly 30 is provided between two adjacent battery modules 20. The energy storage device 100 includes a plurality of heat insulation holders 40. In the longitudinal direction of the battery module 20, heat insulation holders 40 are provided at both ends of each cooling assembly 30 respectively. In the longitudinal direction of the battery module 20, both ends of each cooling assembly 30 are fixed in the fixing grooves 411 of the heat insulation holders 40 respectively. In some other embodiments, as shown in FIGS. 3, 5 and 6, the energy storage device 100 includes a plurality of cooling assemblies 30, and in the longitudinal direction of the battery module 20, a bus plate 50 is provided at the ends on the same side of the plurality of cooling assemblies 30, and the plurality of cooling assemblies 30 are communicated by the bus plate 50.

[0051] That is, the plurality of cooling assemblies 30 are provided opposite to each other along the width direction of the battery module 20. In the embodiment where the plurality of cooling assemblies 30 are provided independently of each other, it is also necessary to provide heat insulation holders 40 at both ends of each cooling assembly 30. In the embodiment where the plurality of cooling assemblies 30 are connected by the bus plate 50 at one end on the same side, it is only necessary to provide a heat insulation holder 40 at only one end of each cooling assembly 30 away from the bus plate 50.

[0052] As can be understood, the cooling assembly 30 is provided between adjacent battery modules 20, and only one side of each battery module 20 is attached to the cooling assembly 30. Thereby, the cooling amounts of the plurality of battery modules 20 can be made substantially the same, and the temperature uniformity between the plurality of battery modules 20 can be improved.

[0053] According to some embodiments of the present invention, the fixing segment 41, the connecting segment 43 and the position limiting segment 42 are integrally formed, which can improve the production efficiency of the heat insulation holder 40 and reduce the production cost of the heat insulation holder 40.

[0054] In the description of the present invention, the orientation or positional relationship indicated by terms such as "center", "vertical direction", "horizontal direction", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial direction", "radial direction", "circumferential direction", etc. is based on the orientation or positional relationship shown in the drawings. It is merely for explaining the present invention and simplifying the explanation, and is not intended to indicate or imply that the indicated device or element necessarily has a specific direction and is configured or operates in a specific direction, and thus cannot be understood as a limitation to the present invention.

[0055] In the description of the present invention, the "first feature" and the "second feature" can include one or more of the corresponding features.

[0056] In the description of the present invention, "a plurality" means two or more.

[0057] In the description of the present invention, the fact that the first feature is "above" or "below" the second feature can include the case where the first feature and the second feature are in direct contact, and can also include the case where the first feature and the second feature are not in direct contact and are in contact through another feature therebetween.

[0058] In the description of the present invention, the fact that the first feature is "above" the second feature includes the case where the first feature is directly above and diagonally above the second feature, or simply indicates that the horizontal height of the first feature is higher than the horizontal height of the second feature.

[0059] In the description of this specification, references such as "one embodiment", "some embodiments", "exemplary embodiments", "exemplification", "specific exemplification", or "some exemplifications" mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or exemplification are included in at least one embodiment or exemplification of the present invention. In this specification, the exemplary descriptions of the above terms do not necessarily indicate the same embodiment or exemplification. Also, the described specific features, structures, materials, or characteristics can be appropriately combined in any one or more embodiments or exemplifications.

[0060] As described above, the embodiments of the present invention have already been shown and described. However, various modifications, corrections, substitutions, and variations can be made to these embodiments without departing from the principles and gist of the present invention. It can be understood by those skilled in the art that the scope of this application is limited by the claims and their equivalents.

Description of Reference Numerals

[0061] 100... Energy storage device 10... Housing 11... Bottom plate 111... Cross beam 112... Vertical beam 1121... Positioning hole 12... Side plate 20... Battery module 30... Cooling assembly 40... Heat insulation holder 41... Fixed segment 411... Fixed groove 412... Positioning protrusion 413... Chamfer ... 414... mounting plate 42... Position limiting segment 421... Body part 422... First reinforcing plate 423... Second reinforcing plate 43... Connecting segment 50... Bus plate

Claims

1. An energy storage device including a housing, a plurality of battery modules, at least one cooling assembly, and at least one heat insulation holder, wherein the plurality of battery modules are housed in the housing, the at least one cooling assembly is provided between the plurality of battery modules, the at least one heat insulation holder is fixed to the housing, and a fixing groove for fixing the cooling assembly is formed in the heat insulation holder, the housing includes a bottom plate and side plates, the bottom plate has a cross beam and a longitudinal beam perpendicular to each other, the longitudinal beam is parallel to the longitudinal direction of the battery module, and the cross beam is parallel to the width direction of the battery module, the bottom plate and the side plates enclose to form the housing, the heat insulation holder is provided on the cross beam and the longitudinal beam, An energy storage device characterized by the above.

2. The heat insulation holder includes a fixing segment, a position limiting segment, and a connecting segment, the fixing segment is located on one side of the cross beam and fixed to the longitudinal beam, and the fixing groove is formed at the top of the fixing segment, the position limiting segment is located on the other side of the cross beam, one end of the connecting segment is connected to the fixing segment, the other end of the connecting segment is connected to the position limiting segment, and the connecting segment is supported by the cross beam, The energy storage device according to claim 1, characterized by the above.

3. A positioning protrusion is formed at the bottom of the fixing segment, a positioning hole is formed in the longitudinal beam, and the positioning protrusion is inserted into the positioning hole, The energy storage device according to claim 2, characterized by the above.

4. The top of the fixing groove and one side of the fixing groove away from the connecting segment are open, facilitating the insertion of the cooling assembly. The energy storage device according to claim 2, characterized in that.

5. Chamfers are formed at the openings of the fixing grooves. The energy storage device according to any one of claims 2 to 4, characterized in that.

6. The groove walls of the fixing groove located on both sides of the cooling assembly have equal thicknesses. The energy storage device according to claim 2, characterized in that.

7. The position limiting segment includes a main body portion, a first reinforcing plate, and two second reinforcing plates. The main body portion is located between the cross beam and the side plate of the housing. One end of the main body portion abuts against the cross beam, and the other end of the main body portion abuts against the side plate. The main body portion is perpendicular to the connecting segment. The first reinforcing plate is provided on the main body portion. The first reinforcing plate is connected to the connecting segment and is in the same plane as the connecting segment. Among the two second reinforcing plates, one second reinforcing plate is provided on one side of the first reinforcing plate, and the other second reinforcing plate is provided on the other side of the first reinforcing plate. The two second reinforcing plates intersect perpendicularly with the first reinforcing plate, and the two second reinforcing plates are symmetrically provided with respect to the first reinforcing plate. The energy storage device according to claim 2, characterized in that.

8. In the longitudinal direction of the battery module, at least one end of the cooling assembly is fixed in the fixing groove of the heat insulation holder. The energy storage device according to claim 1, characterized in that.

9. The energy storage device includes a plurality of the cooling assemblies, each of the cooling assemblies being provided between two adjacent battery modules. The energy storage device includes a plurality of the heat insulation holders, and the heat insulation holders are provided at both ends of each of the cooling assemblies in the longitudinal direction of the battery module. In the longitudinal direction of the battery module, both ends of each of the cooling assemblies are fixed to the fixing grooves of the heat insulation holders. The energy storage device according to claim 8, characterized in that.

10. The energy storage device includes a plurality of the cooling assemblies, and a bus plate is provided at an end on the same side of the plurality of cooling assemblies in the longitudinal direction of the battery module. The plurality of cooling assemblies are communicated with each other by the bus plate. The energy storage device according to claim 8, characterized in that.

11. The fixing segment, the connecting segment and the position limiting segment are integrally formed. The energy storage device according to claim 2, characterized in that.

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