Supporting assembly, battery device and electric equipment

Abstract

The utility model discloses a supporting assembly, a battery device and electric equipment, the supporting assembly is suitable for being arranged between two adjacent battery cells, the supporting assembly comprises a frame and an exhaust structure, the frame is annular and is connected end to end, the frame is suitable for being in contact with the two adjacent battery cells, the frame and the two adjacent battery cells jointly define a containing cavity, and the containing cavity is suitable for containing a phase change substance; the exhaust structure is connected with the frame and provided with an exhaust channel, and the exhaust channel communicates with the containing cavity and the external space. By arranging the frame and the exhaust structure, the frame and the two adjacent battery cells are in contact and jointly define the accommodating cavity, the accommodating cavity accommodates the phase-change substance, the exhaust structure is provided with the exhaust channel to communicate the accommodating cavity with the external space, and gas generated by phase change of the phase-change substance can be exhausted through the exhaust channel; and the phase-change substances which do not change phases are not influenced, the heat dissipation effect can be improved, and the thermal runaway risk is reduced.

Description

Technical Field

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

[0002] The temperature of the battery will gradually increase when it is in use. When the temperature is too high, it will cause thermal runaway of the battery, so it is very important to cool the battery in time.

[0003] In the prior art, phase change materials are used to solve the problem of overheating of batteries. The key point is to use the latent heat of phase change to carry away the heat generated during the use of the battery cell. However, a large amount of gas will be generated after the phase change of the phase change material, which will cause the unvaporized phase change material to accumulate and affect the heat dissipation effect of the battery device. Utility Model Content

[0004] The utility model aims to provide a support assembly, a battery device and an electrical device to solve the problem that the gas generated after the phase change material changes cannot be discharged.

[0005] In order to achieve the purpose of the utility model, the utility model provides the following technical solutions:

[0006] In a first aspect, the utility model provides a support assembly, which is suitable for being arranged between two adjacent battery cells, and includes a frame and an exhaust structure, wherein the frame is annular and connected end to end, and the frame is suitable for contacting with the two adjacent battery cells and forming a receiving cavity together with the two adjacent battery cells, and the receiving cavity is suitable for receiving phase change material; the exhaust structure is connected to the frame, and the exhaust structure is provided with an exhaust channel, and the exhaust channel connects the receiving cavity and the external space.

[0007] In one embodiment, the frame includes a bottom beam and a top beam opposite to each other in the height direction, and a distance from a side of the exhaust structure close to the bottom beam to the bottom beam is greater than a distance from a side of the exhaust structure close to the bottom beam to the top beam.

[0008] In one embodiment, the exhaust structure has a first height H1, and a second height H2 is provided between the bottom beam and the top beam, satisfying: 1 / 6≤H1 / H2≤1 / 3.

[0009] In one embodiment, the frame includes a bottom beam and a top beam opposite to each other in the height direction, and a first connecting beam connecting the bottom beam and the top beam, the exhaust structure is partially accommodated in the accommodating cavity, and the exhaust structure is connected to the first connecting beam and / or the top beam.

[0010] In one embodiment, the exhaust structure includes a first side panel, a second side panel, a third side panel and a fourth side panel connected in sequence, the first side panel and the third side panel are opposite to each other, the second side panel and the fourth side panel are opposite to each other, the exhaust channel includes a first exhaust hole, a second exhaust hole and an exhaust cavity, the first side panel, the second side panel, the third side panel and the fourth side panel enclose the exhaust cavity, the first exhaust hole connects the exhaust cavity and the external space, the second exhaust hole connects the receiving cavity and the exhaust cavity, wherein the first side panel is connected to the first connecting beam and / or the second side panel is connected to the top beam.

[0011] In one embodiment, the first exhaust hole is opened in the first side plate and / or the second side plate, and the second exhaust hole is opened in the third side plate and / or the fourth side plate.

[0012] In one embodiment, the first exhaust hole is opened in the first side plate, and the distance from the first exhaust hole to the second side plate is smaller than the distance from the first exhaust hole to the fourth side plate.

[0013] In one embodiment, the first side plate has a first thickness D1 in the thickness direction of the support assembly, and the first connecting beam has a second thickness D2 in the thickness direction of the support assembly, satisfying: D1 ≥ D2.

[0014] In one embodiment, the exhaust structure further includes an exhaust pipe, which is connected to the first side plate and is located on a side of the first side plate facing away from the third side plate, and the first exhaust hole passes through the exhaust pipe.

[0015] In one embodiment, the support assembly is suitable for being partially accommodated in the receiving groove of the battery cell; the frame includes a main body and a pressure edge, the main body is connected to the exhaust structure, the pressure edge is connected to the surface of the main body facing away from the exhaust structure, the pressure edge is suitable for contacting two adjacent battery cells, the main body is suitable for extending into the receiving groove, and the dimension of the pressure edge in the thickness direction of the support assembly is less than or equal to the dimension of the main body in the thickness direction of the support assembly.

[0016] In one embodiment, the support assembly further includes a support structure, the support structure is accommodated in the accommodation cavity, the support structure includes a support portion, and the support portion is suitable for contacting two adjacent battery cells.

[0017] In one embodiment, the support structure further includes a connecting portion, the connecting portion is connected to the frame, the supporting portion is arranged on the connecting portion, and the dimension of the connecting portion in the thickness direction of the supporting component is smaller than the dimension of the supporting portion in the thickness direction of the supporting component.

[0018] In one embodiment, there are a plurality of the supporting portions, and the plurality of the supporting portions are arranged on the connecting portion at equal intervals along a height direction of the frame.

[0019] In a second aspect, the utility model also provides a battery device, comprising at least two battery cells and a support assembly as described in any one of the various embodiments of the first aspect, wherein the support assembly is arranged between two adjacent battery cells and together with the two adjacent battery cells forms a receiving cavity, wherein the receiving cavity is suitable for receiving phase change material.

[0020] In one embodiment, a receiving groove is provided on a large surface of the battery cell, and the support component is partially received in the receiving groove.

[0021] In a third aspect, the utility model further provides an electrical equipment, comprising an electrical device and a battery device as described in any one of the various embodiments of the second aspect, wherein the battery device supplies power to the electrical device.

[0022] By setting a frame and an exhaust structure, the frame contacts two adjacent battery cells and together encloses a receiving cavity. The receiving cavity is a closed space that receives the phase change material. The exhaust structure is provided with an exhaust channel to connect the receiving cavity with the outside space. The gas generated by the gas-liquid phase change material is only discharged through the exhaust channel, which will not affect the gas-liquid phase change material that has not yet changed phase, thereby improving the heat dissipation effect and reducing the risk of thermal runaway. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 is a schematic diagram of a battery device according to an embodiment;

[0025] Figure 2 is an exploded view of a battery device according to an embodiment;

[0026] Figure 3 is a perspective view of a support assembly of one embodiment;

[0027] Figure 4 is a side cross-sectional view of a support assembly according to one embodiment.

[0028] Description of reference numerals:

[0029] 100-battery device;

[0030] 10-battery core, 11-large surface, 12-receiving slot, 13-installation slot;

[0031] 20-support assembly, 21-frame, 211-bottom beam, 212-top beam, 213-first connecting beam, 214-second connecting beam, 215-main body, 216-edge pressing, 22-exhaust structure, 221-first side plate, 222-second side plate, 223-third side plate, 224-fourth side plate, 225-exhaust pipe, 23-exhaust channel, 231-first exhaust hole, 232-second exhaust hole, 233-exhaust cavity, 24-support structure, 241-support part, 242-connecting part;

[0032] 30- receiving chamber;

[0033] H1 – first height, H2 – second height. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions 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 are within the scope of protection of this application.

[0035] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there can be a central component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there can be a central component at the same time.

[0036] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in this application and in the specification are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in this application includes any and all combinations of one or more of the related listed items.

[0037] In conjunction with the accompanying drawings, some embodiments of the present application are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0038] An embodiment of the utility model provides an electric device, including an electric device and a battery device in the embodiment of the utility model, and the battery device supplies power to the electric device.

[0039] Optionally, the electrical device may be an electric vehicle, a hybrid vehicle, a base station, a household electrical load, etc.

[0040] Optionally, the battery device may be a power battery device, an energy storage battery device, etc., without specific limitation.

[0041] The electrical equipment adopts the battery device in the embodiment of the utility model, and the battery device has good heat dissipation effect and high safety factor.

[0042] Please refer to Figure 1 The embodiment of the utility model further provides a battery device 100 , which includes at least two battery cells 10 and a support structure 24 in the embodiment of the utility model, wherein the support assembly 20 is disposed between two adjacent battery cells 10 .

[0043] Optionally, the battery cell 10 may be a square laminated battery cell 10, a blade battery cell 10, etc., without limitation.

[0044] Optionally, the battery cell 10 includes a positive electrode sheet, a negative electrode sheet and a separator, which are stacked in sequence. The battery device 100 also includes a positive electrode tab and a negative electrode tab, which can be arranged at one end of the battery cell 10 in the length direction, or at two opposite or adjacent ends of the battery cell 10, without specific limitation.

[0045] Optionally, the battery device 100 further includes a shell (not shown in the figure), and the battery cell 10 is accommodated in the shell.

[0046] Optionally, the housing includes a bottom plate and a plurality of side plates, the side plates are connected to the bottom plate and enclosed to form a receiving cavity. The receiving cavity is open at one end opposite to the bottom plate, and the battery cell 10 is received in the receiving cavity.

[0047] Optionally, the shell is made of a material with high structural strength, specifically metal materials, high-strength plastics, ceramics, etc., and metal materials such as aluminum, aluminum alloys, magnesium alloys, iron and iron alloys, etc. The shell can be an integrated structure, that is, the bottom plate and the side plates are an integrated structure made by an integrated molding process, and the integrated molding process can be specifically stamping, casting, etc., without limitation. The shell can also be a split structure, and the side plates and the bottom plate can be connected and fixed by welding, bonding, clamping, screwing, etc. The wall thickness of the shell can be roughly uniform everywhere, that is, the thickness of the side plates can be roughly uniform, and the thickness of the bottom plate and the side plates can also be roughly the same.

[0048] Optionally, the battery device 100 further includes a cover plate, which is connected to the opening of the shell to close the accommodating cavity. The connection between the cover plate and the shell can be welding, bonding, clamping, screwing, etc., without limitation. The shape of the cover plate can be substantially the same as that of the bottom plate.

[0049] Optionally, the number of the battery cells 10 may be 2, 3, 4, 6, etc., without specific limitation.

[0050] Optionally, the number of the support assembly 20 may be one or more. A support assembly 20 may be provided between every two adjacent battery cells 10, or a support assembly 20 may be provided every two or three battery cells 10, without any specific limitation.

[0051] Optionally, the support assembly 20 and two adjacent battery cells 10 together enclose a receiving cavity 30 , and the receiving cavity 30 is suitable for receiving a phase change material.

[0052] The battery device 100 in the embodiment of the present invention has a good heat dissipation effect and a high safety factor by arranging the support assembly 20 between at least two adjacent battery cells 10 .

[0053] Optionally, in the embodiment of the utility model, the surfaces of two adjacent battery cells facing each other are provided with receiving grooves, and the support component is partially received in the receiving grooves. This improves the integration rate of the two adjacent battery cells and the support component, and improves the volume utilization rate of the battery pack. Figure 1 and Figure 2 As shown, the large surface 11 of the battery cell 10 is provided with a receiving groove 12, and the support assembly 20 is partially received in the receiving groove 12. Among them, the large surface of the battery cell is the surface with the largest area among all surfaces of the battery cell, and the support assembly is arranged on two adjacent large surfaces of the battery cell to improve the heat absorption effect of the phase change material in the receiving cavity on the battery cell, thereby improving safety.

[0054] Define the direction first. Please refer to Figure 1 , X is the first direction, Y is the second direction, and Z is the third direction. The length direction of the battery cell 10 is the first direction X, the thickness direction of the battery cell 10 is the second direction Y, and the height direction of the battery cell 10 is the third direction Z.

[0055] Optional, such as Figure 2 As shown, the large surface 11 of the battery cell 10 refers to the main heat dissipation surface of the battery cell 10. In one embodiment, the large surface 11 of the battery cell 10 refers to the surface of the battery cell 10 in the thickness direction Y.

[0056] Optionally, the receiving groove 12 can be directly opened on the large surface 11 of the bare battery cell 10, or the battery cell 10 also includes a shell, the battery cell 10 is received in the shell, and the large surface 11 of the shell is provided with the receiving groove 12. All of the above methods are possible and are not specifically limited.

[0057] By providing the receiving groove 12 on the large surface 11 of the battery cell 10 and partially receiving the support assembly 20 in the receiving groove 12 , the heat of the battery cell 10 can be dissipated in time, thereby reducing safety risks.

[0058] The support assembly 20 in the embodiment of the utility model is described in detail below.

[0059] Please refer to Figure 3 and Figure 4The embodiment of the utility model provides a support assembly 20, which is suitable for being arranged between two adjacent battery cells 10. The support assembly 20 includes a frame 21 and an exhaust structure 22. The frame 21 is annular and connected end to end. The frame 21 is suitable for contacting two adjacent battery cells 10, and together with the two adjacent battery cells 10, it forms a receiving cavity 30. The receiving cavity 30 is suitable for receiving a gas-liquid phase change material (not shown in the figure). The exhaust structure 22 is connected to the frame 21, and the exhaust structure 22 is provided with an exhaust channel 23, which connects the receiving cavity 30 with the external space.

[0060] The support assembly 20 in the embodiment of the utility model is provided with a frame 21 and an exhaust structure 22. The frame 21 contacts two adjacent battery cells 10 and encloses together to form a receiving chamber 30. The receiving chamber 30 is a closed space. The receiving chamber 30 receives the phase change material. The exhaust structure 22 is provided with an exhaust channel 23 to connect the receiving chamber 30 with the external space. The gas generated by the gas-liquid phase change material can be discharged through the exhaust channel 23, which will not affect the phase change material that has not yet changed phases, and can improve the heat dissipation effect and reduce the risk of thermal runaway. In addition, the support assembly is also used to form a receiving chamber for accommodating the phase change material by combining with the battery cell to improve the integration rate of the battery device, improve the heat absorption effect of the phase change material in the receiving chamber on the battery cell, and improve safety.

[0061] Optionally, the frame 21 and the exhaust structure 22 may be an integrated structure, and the frame 21 and the exhaust structure 22 may be an integrated structure made by an integrated molding process, and the integrated molding process may be stamping, injection molding, etc., without limitation. The frame 21 and the exhaust structure 22 may also be a split structure, and the frame 21 and the exhaust structure 22 may be connected and fixed by bonding, clamping, screwing, etc.

[0062] Optionally, the frame 21 may be circular, square, rectangular, polygonal, etc., and may be a ring connected end to end, without specific limitation.

[0063] Optional, such as Figure 3 and Figure 4 As shown, the length direction of the support assembly 20 is the first direction X, the thickness direction of the support assembly 20 is the second direction Y, and the height direction of the support assembly 20 is the third direction Z. The frame 21 contacts two adjacent battery cells 10 in the thickness direction Y, respectively, and the receiving grooves 12 of the two adjacent battery cells 10 are connected and jointly enclosed to form a receiving cavity 30, and at least a part of the support assembly 20 is received in the receiving cavity 30.

[0064] Optionally, after the frame 21 and two adjacent battery cells 10 enclose the receiving cavity 30, a phase change material is injected into the receiving cavity 30. The phase change material can be a gas-liquid phase change material commonly used in the art, such as water, organic phase change material, organic fluoride, nanoporous material, etc., or a solid-gas phase change material, etc., without specific limitation.

[0065] Optionally, the phase change material is in liquid state. After being injected into the receiving cavity 30, a gel material may be injected into the receiving cavity 30, so that the phase change material is in a gel state at room temperature and becomes liquid again at high temperature, which can enhance the stability of the system. The total volume of the phase change material and the gel material should be smaller than the volume of the receiving cavity 30 to avoid overflow of the phase change material.

[0066] Optionally, the phase change material may be injected into the receiving cavity 30 through the exhaust structure 22 .

[0067] Optionally, the number of exhaust structures 22 may be one or more. The exhaust channel 23 connects the receiving chamber 30 and the external space to exhaust the gas generated after the gas-liquid phase change material in the receiving chamber 30 is vaporized. The external space may be the space inside the battery device 100 except the battery cell 10, or the space outside the battery device 100, and there is no specific limitation.

[0068] When the battery device 100 is in use, the temperature will gradually increase. When the temperature is too high, the battery will cause thermal runaway, so it is very important to cool the battery in time. In the prior art, phase change materials can be used to solve the problem of high battery temperature. The core point of this technology is to use phase change latent heat to carry away the heat generated during the use of the battery cell 10.

[0069] However, after the phase change of the phase change material, it changes from liquid phase to gas phase, and its volume will increase by 500-800 times. The large amount of gas generated will cause a sharp increase in the pressure inside the receiving chamber 30. Under normal circumstances, the phase change material in the liquid phase or gel state still has a certain fluidity. The larger internal pressure will push the phase change material that is still in the liquid phase or gel to flow, and even squeeze it to cause the package to rupture, and the phase change material will be lost in large quantities, which will ultimately affect the reliability of the product and fail to achieve the purpose of using the phase change material for effective thermal management. The support structure provided in the utility model can ensure that the gas generated by the formation of the phase change material can be discharged through the exhaust channel 23 at an accelerated speed, and will not affect the phase change material that has not yet changed phase, which can improve the heat dissipation effect and reduce the risk of thermal runaway.

[0070] Optional, such as Figure 3 As shown, the frame 21 includes a bottom beam 211 and a top beam 212 opposite to each other in the height direction Z, and the distance from the side of the exhaust structure 22 close to the bottom beam 211 to the bottom beam 211 is greater than the distance from the side of the exhaust structure 22 close to the bottom beam 211 to the top beam 212.

[0071] Optionally, after the support assembly 20 contacts two adjacent battery cells 10 , the bottom beam 211 is closer to the ground than the top beam 212 , and the exhaust structure 22 is closer to the top beam 212 than the bottom beam 211 .

[0072] Optionally, the bottom beam 211 and the top beam 212 may be in the shape of a cylinder, a prism, etc., without any specific limitation.

[0073] Optionally, the exhaust structure 22 is closer to the top beam 212 than the bottom beam 211, that is, the exhaust structure 22 is located close to the top of the frame 21. After the phase change material undergoes phase change, the gas is collected on the receiving cavity 30. The exhaust structure 22 is located at the top for easy exhaust, and can also increase the storage volume of the phase change material, which can improve the heat dissipation effect of the battery device 100, increase the service life, and prevent the phase change material from overflowing from the exhaust structure 22.

[0074] Optionally, in one embodiment, the exhaust structure 22 is located on a side of the top beam 212 away from the bottom beam 211 , and the exhaust passage 23 is opened on the top beam 212 to connect the receiving cavity 30 with the external space.

[0075] By setting the frame 21 to include a bottom beam 211 and a top beam 212 that are opposite to each other in the height direction Z, after the support assembly 20 contacts two adjacent battery cells 10, the exhaust structure 22 is closer to the top beam 212 far from the ground, which is convenient for exhaust and can also increase the storage volume of the phase change material and improve the heat dissipation effect.

[0076] Optional, such as Figure 3 As shown, the exhaust structure 22 has a first height H1, and a second height H2 is provided between the bottom beam 211 and the top beam 212, satisfying: 1 / 6≤H1 / H2≤1 / 3.

[0077] Optionally, a ratio H1 / H2 of the first height H1 to the second height H2 satisfies: 1 / 5≤H1 / H2≤1 / 4.

[0078] Optionally, the value of H1 / H2 can be 1 / 5, 9 / 40, 1 / 4, etc., without specific limitation.

[0079] By setting the first height H1 of the exhaust structure 22 and the second height H2 of the frame 21 to satisfy 1 / 6≤H1 / H2≤1 / 3, if the ratio of H1 / H2 is too small, the height of the exhaust structure 22 is insufficient, and the number of exhaust holes will be limited, which is not conducive to rapid exhaust; if the ratio of H1 / H2 is too large, the height of the exhaust structure 22 accounts for too large a proportion, which will reduce the storage height of the phase change material in the receiving cavity 30. On the one hand, the phase change material is easy to overflow from the exhaust channel 23, and on the other hand, insufficient phase change material may affect the heat dissipation effect.

[0080] Optional, such as Figure 3As shown, the frame 21 also includes a first connecting beam 213 , which connects the bottom beam 211 and the top beam 212 . The exhaust structure 22 is partially accommodated in the accommodating cavity 30 , and the exhaust structure 22 is connected to the first connecting beam 213 and / or the top beam 212 .

[0081] Optionally, the first connecting beam 213 extends along the height direction Z, and the first connecting beam 213 connects one end of the bottom beam 211 and the end of the top beam 212 on the same side of the length direction X.

[0082] Optionally, the frame 21 further includes a second connecting beam 214 , which is disposed opposite to the first connecting beam 213 in the length direction X, and connects the bottom beam 211 and one end of the top beam 212 on the other side of the length direction X.

[0083] Optionally, the frame 21 can be an integrated structure, that is, the top beam 212, the first connecting beam 213, the bottom beam 211 and the second connecting beam 214 are an integrated structure made by an integrated molding process, and the integrated molding process can be stamping, injection molding, etc., without limitation. The frame 21 can also be a split structure, and the top beam 212, the first connecting beam 213, the bottom beam 211 and the second connecting beam 214 can be connected and fixed by bonding, clamping, screwing, etc.

[0084] Optionally, the first connecting beam 213 and the second connecting beam 214 may be in the shape of a cylinder, a prism, etc., which is not specifically limited.

[0085] Optionally, the exhaust structure 22 is connected to the first connecting beam 213; or, the exhaust structure 22 is connected to the top beam 212; or, the exhaust structure 22 is connected to both the first connecting beam 213 and the top beam 212. All of the above methods are possible and are not specifically limited.

[0086] Optionally, there may be multiple exhaust structures 22. For example, there are two exhaust structures 22, one of which is connected to the first connecting beam 213 and the top beam 212, and the other is connected to the second connecting beam 214 and the top beam 212. Providing multiple exhaust structures 22 can discharge the gas generated by the phase change of the phase change material in the receiving cavity 30 more quickly, and the heat dissipation effect is good.

[0087] By setting the frame 21 to also include a first connecting beam 213, the first connecting beam 213 connects the bottom beam 211 and the top beam 212, the exhaust structure 22 is connected to the first connecting beam 213 and / or the top beam 212, at least part of the exhaust structure 22 is at least part of the frame 21, the connection is stable, and materials are saved.

[0088] Optional, such as Figure 3As shown, the exhaust structure 22 includes a first side panel 221, a second side panel 222, a third side panel 223 and a fourth side panel 224 which are connected in sequence, the first side panel 221 and the third side panel 223 are opposite to each other, the second side panel 222 and the fourth side panel 224 are opposite to each other, the first side panel 221 is connected to the first connecting beam 213, and / or the second side panel 222 is connected to the top beam 212.

[0089] Optionally, the exhaust structure 22 may be an integrated structure, that is, the first side plate 221, the second side plate 222, the third side plate 223 and the fourth side plate 224 are an integrated structure made by an integrated molding process, and the integrated molding process may be stamping, injection molding, etc., without limitation. The exhaust structure 22 may also be a split structure, and the first side plate 221, the second side plate 222, the third side plate 223 and the fourth side plate 224 may be connected and fixed by bonding, clamping, screwing, etc.

[0090] Optionally, the first side panel 221 and the first connecting beam 213 can be an integrated structure, and the integrated molding process can be specifically stamping, injection molding, etc.; the first side panel 221 and the first connecting beam 213 can also be connected and fixed by bonding, clamping, screwing, etc., without specific limitation.

[0091] Similarly, the connection method between the second side plate 222 and the top beam 212 is similar to the connection method between the first side plate 221 and the first connecting beam 213 , which can be referred to and will not be described in detail.

[0092] Preferably, by setting a first side panel 221 connected to the first connecting beam 213 and a second side panel 222 connected to the top beam 212, two adjacent side panels of the exhaust structure 22 are respectively connected to two adjacent beams of the frame 21. Not only is the exhaust structure 22 located at the top for easy exhaust, but the connection stability can also be improved. In addition, materials can be saved and costs can be reduced.

[0093] In addition, by arranging the first side plate 221 to be connected to the first connecting beam 213, and / or the second side plate 222 to be connected to the top beam 212, the exhaust structure 22 is located at the top during assembly, which can play a certain positioning role.

[0094] Optionally, the first side plate 221 is connected to the first connecting beam 213, and the second side plate 222 and the top beam 212 are spaced apart; or, the second side plate 222 and the top beam 212 are connected, and the first side plate 221 and the first connecting beam 213 are spaced apart. All of the above methods are possible and are not specifically limited.

[0095] Optional, such as Figure 3As shown, the exhaust channel 23 includes a first exhaust hole 231, a second exhaust hole 232 and an exhaust cavity 233. The first side plate 221, the second side plate 222, the third side plate 223 and the fourth side plate 224 enclose the exhaust cavity 233, the first exhaust hole 231 connects the exhaust cavity 233 and the external space, and the second exhaust hole 232 connects the receiving cavity 30 and the exhaust cavity 233.

[0096] Optionally, the shapes of the first exhaust hole 231 and the second exhaust hole 232 may be square, circular, triangular, etc. The shape and size of the first exhaust hole 231 may be the same as or different from the shape and size of the second exhaust hole 232, and there is no specific limitation.

[0097] Optionally, the number of the first exhaust hole 231 and the second exhaust hole 232 may be one or more, and there is no specific limitation thereto.

[0098] Optionally, the first exhaust hole 231 may be provided in the first side plate 221 and / or the second side plate 222, and the second exhaust hole 232 may be provided in the third side plate 223 and / or the fourth side plate 224, without any specific limitation. Specifically, when the first exhaust hole 231 may be provided in the first side plate 221, the first side plate 221 is connected to the first connecting beam 213. When the first exhaust hole 231 may be provided in the second side plate 222, the second side plate 222 is connected to the top beam 212.

[0099] Optionally, the first side plate 221, the second side plate 222, the third side plate 223 and the fourth side plate 224 separate the exhaust chamber 233 from the receiving chamber 30, and the second exhaust hole 232 connects the receiving chamber 30 and the exhaust chamber 233, so that the gas generated by the phase change of the phase change material in the receiving chamber 30 can be first introduced from the receiving chamber 30 to the exhaust chamber 233. When the phase change material undergoes a drastic phase change, the liquid phase change material may be ejected from the receiving chamber 30 through the second exhaust hole 232 along with the gas, but the liquid phase change material in the exhaust chamber 233 will fall due to gravity and accumulate in the exhaust chamber 233, and will not be discharged from the first exhaust hole 231, so that the phase change material can be prevented from overflowing.

[0100] In addition, the first side plate 221, the second side plate 222, the third side plate 223 and the fourth side plate 224 are tightly attached to the bottom wall and / or side wall of the receiving groove 12 of the battery cell 10, which can prevent the liquid phase change material in the receiving cavity 30 from directly entering the exhaust cavity 233 through the gap, thereby playing a sealing role.

[0101] Optional, such as Figure 3As shown, the first exhaust hole 231 is provided in the first side plate 221, the second exhaust hole 232 is provided in the third side plate 223, and the distance between the first exhaust hole 231 and the second side plate 222 is smaller than the distance between the first exhaust hole 231 and the fourth side plate 224. By limiting the distance between the first exhaust hole 231 and the second side plate and the fourth side plate, the exhaust structure 22 is ensured to be closer to the top beam 212, so as to facilitate gas discharge.

[0102] Further, the distance from the second exhaust hole 232 to the second side plate 222 is smaller than the distance from the second exhaust hole 232 to the fourth side plate 224 .

[0103] Optionally, the first exhaust hole 231 and the second exhaust hole 232 are closer to the second side plate 222 than the fourth side plate 224. Since the gas generated by the phase change of the phase change material will gather at the top, the first exhaust hole 231 and the second exhaust hole 232 are both opened at a position of the exhaust structure 22 closer to the top beam 212 to facilitate gas discharge.

[0104] Optionally, the axis of the first exhaust hole 231 and the axis of the second exhaust hole 232 can be located at the same height, or the distance from the first exhaust hole 231 to the fourth side plate 224 is greater than or equal to the distance from the second exhaust hole 232 to the fourth side plate 224, so as to facilitate the separation of the gas and liquid phase change material entering the exhaust chamber 233 from the second exhaust hole 232, and the gas ascends and is discharged from the first exhaust hole 231, and the liquid falls and is accommodated in the exhaust chamber 233.

[0105] Optionally, the first exhaust hole 231 is sealed with a liquid diaphragm (not shown in the figure), which can further ensure that only gas is discharged from the first exhaust hole 231.

[0106] Optionally, the second exhaust hole 232 can be sealed with a piston structure (not shown in the figure), and when the battery cell 10 is in thermal runaway, the phase change material undergoes a phase change, causing the internal pressure in the receiving chamber 30 to increase, thereby opening the piston structure and exhausting gas through the second exhaust hole 232. In addition, the increase in internal pressure caused by the spontaneous expansion of the battery cell 10 during long-term operation will also open the piston structure and release pressure through the second exhaust hole 232.

[0107] By providing a first exhaust hole 231 opened on the first side plate 221 and a second exhaust hole 232 opened on the third side plate 223, the first exhaust hole 231 is closer to the second side plate 222 than the fourth side plate 224, and the first exhaust hole 231 is closer to the second side plate 222 than the second exhaust hole 232, so that the gas gathered at the top is easily discharged.

[0108] Optional, such as Figure 3As shown, the first side plate 221 has a first thickness D1 in the thickness direction Y of the support assembly 20 , and the first connecting beam 213 has a second thickness D2 in the thickness direction Y of the support assembly 20 , satisfying: D1 ≥ D2.

[0109] Optionally, the first side plate 221 is adapted to abut against the bottom wall of the receiving groove 12 of the battery cell 10 in the thickness direction Y to seal the exhaust cavity 233 to prevent the liquid phase change material in the receiving cavity 30 from entering the exhaust cavity 233 .

[0110] Optionally, the dimension of the first connecting beam 213 in the thickness direction Y of the support assembly 20 is equal to or smaller than the dimension of the first side plate 221 in the thickness direction Y of the support assembly 20. At least a portion of the first connecting beam 213 in the thickness direction Y only needs to extend into the receiving groove 12 without contacting the bottom wall of the receiving groove 12, thereby increasing the assembly tolerance and reducing the difficulty of installation.

[0111] Optionally, the relationship between the thickness of the second side plate 222 and the thickness of the top beam 212 is similar to the relationship between the thickness of the first side plate 221 and the first connecting beam 213 , which can be referred to and will not be described in detail.

[0112] By setting the first thickness D1 of the first side plate 221 in the thickness direction Y of the support component 20 to be greater than or equal to the second thickness D2 of the first connecting beam 213 in the thickness direction Y of the support component 20, the first side plate 221 abuts against the inner wall of the receiving groove 12, thereby preventing the liquid phase change material in the receiving cavity 30 from entering the exhaust cavity 233.

[0113] Optionally, the exhaust structure 22 further includes an exhaust pipe 225 , which is connected to the first side plate 221 and located on a side of the first side plate 221 facing away from the third side plate 223 , and the first exhaust hole 231 passes through the exhaust pipe 225 .

[0114] Optionally, the shape of the exhaust pipe 225 can be cylindrical, prismatic, etc., without specific limitation.

[0115] Optionally, the exhaust pipe 225 and the first side panel 221 may be an integrated structure or a split structure, and the exhaust pipe 225 and the first side panel 221 may be connected and fixed by bonding, snapping, screwing, etc., without specific limitation.

[0116] Optionally, a corresponding mounting groove 13 is formed on the large surface 11 of the battery cell 10 to accommodate the exhaust pipe 225 .

[0117] Optionally, the exhaust pipe 225 can be accommodated in the shell of the battery device 100, and the gas generated by the phase change of the phase change material in the receiving chamber 30 can be discharged into the shell of the battery device 100 through the exhaust pipe 225, and then discharged outside the shell through the gas outlet channel opened in the shell. Alternatively, at least part of the exhaust pipe 225 is connected to the shell, and the first exhaust hole 231 connects the exhaust chamber 233 and the space outside the battery device 100, and the gas generated by the phase change of the phase change material in the receiving chamber 30 is directly discharged from the battery device 100 through the first exhaust hole 231 of the exhaust pipe 225. All of the above methods are possible and are not specifically limited.

[0118] By setting the exhaust structure 22 to also include an exhaust pipe 225, the exhaust pipe 225 is connected to the side of the first side plate 221 facing away from the third side plate 223, and the first exhaust hole 231 runs through the exhaust pipe 225, which can further reduce the risk of liquid phase change material entering the exhaust cavity 233 directly splashing out from the first exhaust hole 231.

[0119] Optionally, a receiving groove 12 is provided on the large surface 11 of the battery cell 10, and the support assembly 20 is suitable for being partially received in the receiving groove 12 of the battery cell 10. The frame 21 includes a main body 215 and a pressure edge 216. The main body 215 is connected to the exhaust structure 22, and the pressure edge 216 is connected to the surface of the main body 215 facing away from the exhaust structure 22. The pressure edge 216 is suitable for contacting two adjacent battery cells 10. The main body 215 is suitable for extending into the receiving groove 12, and the dimension of the pressure edge 216 in the thickness direction of the support assembly 20 is less than or equal to the dimension of the main body 215 in the thickness direction of the support assembly 20.

[0120] Optionally, the main body 215 and the edge pressing 216 may be connected and fixed by bonding, clamping, screwing, etc. The first connecting beam 213 , the top beam 212 , the bottom beam 211 and the second connecting beam 214 are all composed of the main body 215 and the edge pressing 216 .

[0121] Optionally, the material of the edge pressing 216 can be a soft compressible material such as rubber, specifically polyurethane, chloroprene rubber, etc., without limitation. When two adjacent battery cells 10 are assembled in the thickness direction Y, a certain horizontal pre-tightening force is applied so that the edge pressing 216 abuts against the large surface 11 of the two adjacent battery cells 10 to seal and close the receiving cavity 30.

[0122] Optionally, the dimension of the pressing edge 216 in the thickness direction Y of the support assembly 20 is smaller than the dimension of the main body 215 in the thickness direction Y of the support assembly 20, so that when the large surface 11 of the battery cell 10 contacts the pressing plate, the main body 215 extends into the receiving groove 12 and contacts the side wall of the receiving groove 12. When the battery device 100 undergoes thermal runaway, the phase change material undergoes phase change to dissipate heat, and the generated gas causes the pressure in the receiving cavity 30 to increase. The side of the main body 215 that contacts the side wall of the receiving groove 12 will be pressed outward, which can further enhance the sealing effect of the frame 21.

[0123] Optionally, after the frame 21 and two adjacent battery cells 10 are assembled, glue may be applied to the contact portion between the large surface 11 of the battery cell 10 and the pressing plate to further enhance the sealing effect.

[0124] By setting the frame 21 to include a main body 215 and a pressing edge 216, the size of the pressing edge 216 in the thickness direction of the support component 20 is less than or equal to the size of the main body 215 in the thickness direction of the support component 20, the pressing edge 216 contacts two adjacent battery cells 10 to close the receiving cavity 30, and the main body 215 extends into the receiving groove 12 to further enhance the sealing effect.

[0125] Optional, such as Figure 3 and Figure 4 As shown, the support assembly 20 further includes a support structure 24, which is received in the receiving cavity 30. The support structure 24 includes a support portion 241, which is suitable for contacting the battery cell 10.

[0126] Optionally, the support portion 241 may be made of a material having a certain strength, such as metal, ceramic, hard high temperature resistant plastic, etc. The support portion 241 may be in a block shape, a column shape, etc., and is not specifically limited.

[0127] Optionally, both ends of the support portion 241 in the thickness direction Y of the support assembly 20 are in contact with the bottom walls of the receiving grooves 12 of two adjacent battery cells 10. When the battery cell 10 undergoes thermal runaway, the battery cell 10 expands in the thickness direction Y, and the support portion 241 can effectively reduce the expansion of the battery cell 10 in the thickness direction Y, thereby reducing the effect of the expansion of the battery cell 10 on the extrusion of the phase change material, preventing the phase change material from being extruded, thereby ensuring its cooling capacity.

[0128] In addition, after the phase change material in the receiving cavity 30 has completely changed phase, the support portion 241 can prevent the inner walls of the receiving grooves 12 of adjacent battery cells 10 from directly contacting each other, which is equivalent to constructing an air layer between the battery cells 10, thereby increasing the thermal resistance between the battery cells 10 and delaying or even preventing thermal runaway of adjacent battery cells 10.

[0129] Optionally, the number of the supporting portion 241 may be one or more, and there is no specific limitation thereto. The multiple supporting portions 241 may be arranged in an array in the receiving cavity 30 .

[0130] By setting the support structure 24 of the support assembly 20 to include a support portion 241, the support portion 241 can effectively reduce the expansion of the battery cell 10 in the thickness direction Y, avoid direct contact between the inner walls of the receiving grooves 12 of adjacent battery cells 10, and delay or even prevent thermal runaway of adjacent battery cells 10.

[0131] Optional, such as Figure 3 and Figure 4As shown, the support structure 24 also includes a connecting portion 242, which is connected to the frame 21, and the support portion 241 is arranged on the connecting portion 242. The size of the connecting portion 242 in the thickness direction of the support component 20 is smaller than the size of the support portion 241 in the thickness direction of the support component 20.

[0132] Optionally, the material of the connecting portion 242 can be a lightweight material such as plastic, which is convenient for arranging the supporting portion 241 in the receiving cavity 30. The connecting portion 242 and the frame 21 can be connected by bonding, clamping, screwing, etc., which is not specifically limited.

[0133] Optionally, the support portion 241 is arranged on the connecting portion 242, and the support portion 241 is connected to the frame 21 as a whole through the connecting portion 242, and the dimension of the connecting portion 242 in the thickness direction Y of the support component 20 is smaller than the dimension of the support portion 241 in the thickness direction Y of the support component 20, that is, the connecting portion 242 does not contact the bottom wall of the receiving groove 12 of the battery cell 10 in the thickness direction Y of the support component 20, which can ensure the free flow of the phase change material in the receiving cavity 30 without forming a closed small cavity, thereby preventing severe thermal runaway in the local area from causing the phase change material to be consumed without timely replenishment, thereby causing a large temperature rise.

[0134] Optionally, the connecting portion 242 may extend along the height direction Z of the support assembly 20 to connect the top beam 212 and the bottom beam 211; or, the connecting portion 242 may extend along the length direction X of the support assembly 20 to connect the first connecting beam 213 and the second connecting beam 214; or, the connecting portion 242 may extend obliquely. All of the above methods are possible and are not specifically limited.

[0135] Optionally, there are multiple support parts 241, and the multiple support parts 241 are arranged on the connecting part 242 at equal distances along the height direction Z of the frame, which can avoid direct contact between the inner walls of the receiving grooves 12 of adjacent battery cells 10, delaying or even preventing thermal runaway of adjacent battery cells 10.

[0136] For example, Figure 3 As shown, there are multiple connecting parts 242 arranged at equal distances in the length direction X of the support assembly 20, and the multiple connecting parts 242 extend along the height direction Z of the support assembly 20. Each connecting part 242 is provided with multiple supporting parts 241 arranged at equal distances.

[0137] The support structure 24 of the support assembly 20 includes a support portion 241 and a connecting portion 242, wherein the connecting portion 242 connects the support portion 241 and the frame 21, and the support portion 241 is suitable for contacting the battery cell 10, thereby reducing the expansion of the battery cell 10 in the thickness direction Y, thereby reducing the effect of the expansion of the battery cell 10 on the extrusion of the phase change material, preventing the phase change material from being squeezed out, thereby ensuring its cooling capacity.

[0138] In the description of the embodiments of the present application, it should be noted that the orientation or positional relationship of terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inside" and "outside" are based on the orientation or positional relationship described in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0139] What is disclosed above is only a preferred embodiment of the present application, and it certainly cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of implementing the above embodiment and equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. A support assembly, characterized in that: The support assembly is suitable for being arranged between two adjacent battery cells, and the support assembly comprises: A frame, the frame is annular and connected end to end, the frame is suitable for contacting two adjacent battery cells, and together with the two adjacent battery cells, forms a receiving cavity, and the receiving cavity is suitable for receiving a phase change material; An exhaust structure is connected to the frame, and an exhaust channel is provided in the exhaust structure, and the exhaust channel communicates with the receiving cavity and the external space.

2. The support assembly according to claim 1, characterized in that: The frame includes a bottom beam and a top beam opposite to each other in the height direction, and a distance from a side of the exhaust structure close to the bottom beam to the bottom beam is greater than a distance from a side of the exhaust structure close to the bottom beam to the top beam.

3. The support assembly according to claim 2, characterized in that: The exhaust structure has a first height H1, and a second height H2 is provided between the bottom beam and the top beam, satisfying: 1 / 6≤H1 / H2≤1 / 3.

4. The support assembly according to claim 1, characterized in that: The frame includes a bottom beam and a top beam opposite to each other in the height direction, and a first connecting beam connecting the bottom beam and the top beam. The exhaust structure is partially accommodated in the accommodation cavity, and the exhaust structure is connected to the first connecting beam and / or the top beam.

5. The support assembly according to claim 4, characterized in that: The exhaust structure includes a first side panel, a second side panel, a third side panel and a fourth side panel connected in sequence, the first side panel and the third side panel are opposite to each other, the second side panel and the fourth side panel are opposite to each other, the exhaust channel includes a first exhaust hole, a second exhaust hole and an exhaust cavity, the first side panel, the second side panel, the third side panel and the fourth side panel enclose the exhaust cavity, the first exhaust hole connects the exhaust cavity and the external space, the second exhaust hole connects the receiving cavity and the exhaust cavity, wherein the first side panel is connected to the first connecting beam and / or the second side panel is connected to the top beam.

6. The support assembly according to claim 5, characterized in that: The first exhaust hole is opened on the first side plate and / or the second side plate, and the second exhaust hole is opened on the third side plate and / or the fourth side plate.

7. The support assembly according to claim 6, characterized in that: The first exhaust hole is opened in the first side plate, and the distance from the first exhaust hole to the second side plate is smaller than the distance from the first exhaust hole to the fourth side plate.

8. The support assembly according to claim 5, characterized in that: The first side plate has a first thickness D1 in the thickness direction of the support assembly, and the first connecting beam has a second thickness D2 in the thickness direction of the support assembly, satisfying: D1≥D2.

9. The support assembly according to claim 5, characterized in that: The exhaust structure further includes an exhaust pipe, which is connected to the first side plate and is located on a side of the first side plate facing away from the third side plate, and the first exhaust hole runs through the exhaust pipe.

10. The support assembly according to any one of claims 1 to 9, characterized in that: The support assembly is suitable for being partially accommodated in the receiving groove of the battery cell; the frame includes a main body and a pressure edge, the main body is connected to the exhaust structure, the pressure edge is connected to the surface of the main body facing away from the exhaust structure, the pressure edge is suitable for contacting two adjacent battery cells, the main body is suitable for extending into the receiving groove, and the size of the pressure edge in the thickness direction of the support assembly is less than or equal to the size of the main body in the thickness direction of the support assembly.

11. The support assembly according to claim 1, characterized in that The support assembly further includes a support structure, which is received in the receiving cavity. The support structure includes a support portion, which is suitable for contacting two adjacent battery cells.

12. The support assembly according to claim 11, characterized in that The support structure also includes a connecting portion, which is connected to the frame, and the support portion is arranged on the connecting portion. The size of the connecting portion in the thickness direction of the support component is smaller than the size of the support portion in the thickness direction of the support component.

13. The support assembly according to claim 12, characterized in that There are a plurality of support portions, and the plurality of support portions are arranged on the connection portion at equal intervals along a height direction of the frame.

14. A battery device, characterized in that: It comprises at least two battery cells and a support assembly as claimed in any one of claims 1 to 13, wherein the support assembly is arranged between two adjacent battery cells and together with the two adjacent battery cells forms a receiving cavity, wherein the receiving cavity is suitable for receiving a phase change material.

15. The battery device according to claim 14, characterized in that: A receiving groove is provided on the large surface of the battery core, and the support component is partially received in the receiving groove.

16. An electrical equipment, characterized in that: It comprises an electric device and a battery device as claimed in claim 14 or 15, wherein the battery device supplies power to the electric device.

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