Uniform temperature assembly for battery assembly, battery pack and electric device

Abstract

The utility model discloses a kind of temperature equalizing assembly for battery assembly, battery pack and electric device, temperature equalizing assembly includes first part, second part and structure column, first part is located in battery assembly, second part is connected to the side of first part away from battery assembly and with first part sealing cooperation to define temperature equalizing space, temperature equalizing space is filled with liquid working substance, structure column is located in temperature equalizing space.The temperature equalizing assembly of the utility model embodiment, by utilizing self structure to define temperature equalizing space, not only reduce the forming difficulty of temperature equalizing space, it is also favorable to guarantee the sealing of temperature equalizing space, to improve the temperature equalizing effect of temperature equalizing assembly;Meanwhile, by setting structure column, it is convenient to increase the heat exchange area of temperature equalizing assembly, improve and improve the heat exchange effect of temperature equalizing assembly to battery assembly, so that temperature equalizing assembly not only can absorb the heat generated in normal charging and discharging process of battery assembly, heat caused by mechanical damage etc.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a temperature equalization component, battery pack and power supply device for battery modules. Background Technology

[0002] Battery heat generation can be broadly categorized into two types: heat generation during normal operation and abnormal heat generation. The first type is the heat generated during battery charging and discharging, while the second type is usually caused by overcharging, over-discharging, or short circuits in the battery. The second type is more likely to cause localized overheating of the battery pack, leading to safety accidents such as battery pack overheating, fire, or even explosion.

[0003] Currently, heat exchangers are typically used to absorb the heat generated by individual battery cells in order to delay or prevent thermal runaway from spreading to other normal battery cells. However, the heat exchanger effect of existing heat exchangers is poor. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the primary objective of this invention is to provide a heat-equalizing component for battery modules. The heat absorption effect of this component on the battery module, to a certain extent, ensures the performance and safety of the battery module, thus solving the technical problem in the prior art where heat-equalizing components cannot suppress abnormal heat generation and cause heat diffusion.

[0005] The second objective of this invention is to provide a battery pack having the aforementioned temperature equalization component.

[0006] The third objective of this invention is to provide an electrical device having the aforementioned battery pack.

[0007] A temperature equalization assembly for a battery module according to an embodiment of the present invention includes: a first part adapted to be disposed on the battery module; a second part connected to the side of the first part away from the battery module and sealed to the first part, the second part cooperating with the first part to define a temperature equalization space, the temperature equalization space being filled with a liquid working fluid; and a structural column disposed within the temperature equalization space.

[0008] According to the embodiments of the present invention, the temperature equalization component for battery modules defines a temperature equalization space by using a second part and a first part in a sealed fit. This not only reduces the molding difficulty of the temperature equalization space but also helps to ensure the sealing performance of the temperature equalization space, thereby improving the temperature equalization effect of the temperature equalization component. At the same time, by setting structural columns in the temperature equalization space, the heat exchange area of ​​the temperature equalization component can be increased to a certain extent, thereby improving the heat exchange efficiency of the temperature equalization component. This improves the heat exchange effect of the temperature equalization component on the battery module, so that the temperature equalization component of this application can not only absorb the heat generated by the battery module during normal charging and discharging but also absorb the heat caused by abnormal conditions such as mechanical damage, thereby improving the performance and safety of the battery module.

[0009] In some embodiments, the liquid working fluid is a phase change material, and a temperature homogenization channel is defined within the temperature homogenization space, along which the liquid working fluid flows.

[0010] In some embodiments, the width of the uniform temperature flow channel ranges from 2mm to 30mm.

[0011] In some embodiments, the temperature equalization component is adapted to be disposed on top of the battery assembly, and the structural column is disposed at a distance from the second portion. In some embodiments, the structural columns include a plurality of columns, which are spaced apart within the temperature equalization space, and the temperature equalization flow channel is defined between two adjacent structural columns.

[0012] In some embodiments, the temperature equalization component is adapted to be disposed on top of the battery assembly, and the structural column is disposed in the second portion and spaced apart from the liquid working fluid.

[0013] In some embodiments, the structural columns satisfy the following relationship: Wherein, the liquid working fluid has a first liquid surface in contact with the first part and a second liquid surface near the second part; the height of the structural column is greater than or equal to the distance between the first liquid surface and the second liquid surface; P is the perimeter of the cross-section of the structural column in contact with the second liquid surface; A is the cross-sectional area of ​​the structural column in contact with the first liquid surface; h l The distance between the first liquid surface and the second liquid surface; the cross section is perpendicular to the axis of the structural column.

[0014] In some embodiments, the first portion and / or the second portion are provided with a pressure relief valve, which is configured to rupture when a set pressure is reached inside the temperature equalization space to release gas from the temperature equalization space.

[0015] In some embodiments, the temperature equalization component further includes a support member disposed within the temperature equalization space, and the support member is respectively engaged with the first portion and the second portion.

[0016] In some embodiments, the support member is spaced apart from the structural column, and a uniform temperature flow channel is formed between the support member and the structural column.

[0017] In some embodiments, the support member is an absorbent member.

[0018] In some embodiments, the second portion has a heat dissipation component on the side facing away from the temperature equalization space.

[0019] In some embodiments, the temperature equalization assembly further includes a thermal insulation seal disposed at the connection between the first portion and the second portion.

[0020] A battery pack according to an embodiment of the present invention includes: a battery assembly comprising a plurality of battery cells arranged along a first direction; and a temperature equalization assembly, which is the aforementioned temperature equalization assembly, disposed on one side of the battery assembly in a second direction, the second direction intersecting the first direction.

[0021] According to the embodiments of the present invention, the battery pack, by employing the aforementioned temperature equalization component, can improve the performance and safety of the battery pack to a certain extent.

[0022] In some embodiments, the temperature equalization component is disposed on the upper side of the battery assembly.

[0023] The electrical device according to an embodiment of the present invention includes the aforementioned battery pack.

[0024] The electrical device according to the embodiments of the present invention can improve the performance and safety of the electrical device to a certain extent by using the aforementioned battery pack.

[0025] Additional aspects and advantages of this invention will become apparent from the description which follows, or may be learned by practice of this invention. Attached Figure Description

[0026] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of a battery pack according to some embodiments of the present invention.

[0027] Figure 2 for Figure 1 A diagram from another angle.

[0028] Figure 3 for Figure 1 The front view.

[0029] Figure 4 for Figure 1 Side view.

[0030] Figure 5 for Figure 1 Exploded view.

[0031] Figure 6 This is a schematic diagram of a partial structure of a temperature equalization component according to some embodiments of the present invention.

[0032] Figure label: 2000, battery pack; 1000, Temperature Equalization Components; 100. Part One; 110. Temperature equalization space; 111. Temperature equalization flow channel; 120. Pressure relief valve; 200. Part Two; 300. Structural column; 400. Support components; 500. Thermal insulation seals; 1100, Battery assembly; 1110, Battery cell. Detailed Implementation

[0033] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0034] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0035] The following description, with reference to the accompanying drawings, describes an embodiment of the present invention: a temperature equalization component 1000 for a battery assembly 1100.

[0036] Combination Figures 1-5As shown, the temperature equalization component 1000 for battery assembly 1100 according to an embodiment of the present invention includes: a first part 100, a second part 200 and a structural column 300.

[0037] Among them, such as Figure 1 As shown, the first part 100 is adapted to be disposed on the battery assembly 1100. This allows the temperature equalization component 1000 to be disposed on the battery assembly 1100, reducing the difficulty of matching the temperature equalization component 1000 with the battery assembly 1100, thereby facilitating the use of the temperature equalization component 1000 to perform temperature equalization treatment on the battery assembly 1100, ensuring the working performance of the temperature equalization component 1000, and improving the safety of the battery assembly 1100 in use.

[0038] With the above settings, when the battery assembly 1100 generates heat, the heat can be transferred to the first part 100 so that the heat dissipation component 1000 can be used to cool the battery assembly 1100.

[0039] Combination Figures 1-5 As shown, the second part 200 is connected to the side of the first part 100 opposite to the battery assembly 1100 and is sealed to the first part 100. The second part 200 and the first part 100 together define a temperature equalization space 110, which is filled with a liquid working fluid (not shown in the figure). By connecting the second part 200 to the side of the first part 100 opposite to the battery assembly 1100 and sealing it to the first part 100, a closed temperature equalization space 110 can be formed between the side of the first part 100 opposite to the battery assembly 1100 and the second part 200. This prevents leakage of the liquid working fluid when the battery assembly 1100 is subjected to external impact, thereby ensuring the heat exchange effect of the temperature equalization component 1000. When the battery assembly 1100 experiences thermal runaway due to abnormal heat generation, the temperature equalization component 1000 can absorb heat, thus ensuring the safety of the battery assembly 1100.

[0040] Meanwhile, by using the second part 200 in conjunction with the first part 100 to define the temperature uniformity space 110, not only is the molding difficulty of the temperature uniformity space 110 reduced, but it is also beneficial to ensure the sealing of the temperature uniformity space 110, so that the liquid working fluid can be effectively filled in the temperature uniformity space 110, thereby facilitating the improvement of the temperature uniformity effect of the temperature uniformity component 1000.

[0041] It should be noted that the temperature equalization space 110 mentioned above can be understood as the closed internal space formed between the side of the first part 100 away from the battery assembly 1100 and the second part 200.

[0042] In a specific example, the temperature equalization space 110 can provide a closed internal space for the liquid working fluid to prevent leakage of the liquid working fluid when the battery assembly 1100 is subjected to external impact, thereby ensuring the heat exchange effect of the temperature equalization component 1000 and thus ensuring the safety of the battery assembly 1100.

[0043] Furthermore, by connecting the second part 200 to the side of the first part 100 away from the battery assembly 1100, the heat transferred from the first part 100 to the temperature equalization space 110 by the second part 200 can be dissipated to the external environment, thereby reducing the temperature of the battery assembly 1100 and achieving the purpose of heat dissipation for the battery assembly 1100.

[0044] It is also worth noting that this application defines a temperature equalization space 110 and fills the temperature equalization space 110 with a liquid working fluid. Compared with the prior art, which uses a liquid film (micrometer level) to exchange heat with the battery module 1100, this application can effectively increase the content of the liquid working fluid, thereby improving the heat exchange effect of the temperature equalization component 1000. This allows the temperature equalization component 1000 to absorb heat when the battery module 1100 experiences thermal runaway due to abnormal heat generation.

[0045] Combination Figures 1-5 As shown, the structural column 300 is disposed within the temperature equalization space 110. The structural column 300 can increase the heat exchange area of ​​the temperature equalization component 1000 to a certain extent, and improve the heat exchange efficiency of the temperature equalization component 1000 to a certain extent, thereby improving and enhancing the heat exchange effect of the temperature equalization component 1000 on the battery component 1100. This allows the temperature equalization component 1000 of this application to not only absorb the heat generated by the battery component 1100 during normal charging and discharging, but also absorb the heat generated by thermal runaway of the battery component 1100 caused by abnormal conditions such as mechanical damage, thereby ensuring the performance and safety of the battery component 1100 to a certain extent.

[0046] As can be seen from the above structure, the temperature equalization component 1000 for the battery assembly 1100 of this utility model defines a sealed temperature equalization space 110 by using the second part 200 in cooperation with the first part 100. This allows the temperature equalization component 1000 to define the temperature equalization space 110 by itself, which not only reduces the molding difficulty of the temperature equalization space 110, but also helps to ensure the sealing of the temperature equalization space 110. This allows the liquid working fluid to be effectively filled in the temperature equalization space 110, which is conducive to improving the temperature equalization effect of the temperature equalization component 1000.

[0047] Meanwhile, by setting up structural columns 300, the heat exchange area of ​​the temperature equalization component 1000 is increased to a certain extent, thereby improving the heat exchange efficiency of the temperature equalization component 1000. This improves the heat exchange effect of the temperature equalization component 1000 on the battery component 1100, so that the temperature equalization component 1000 of this application can not only absorb the heat generated by the battery component 1100 during normal charging and discharging, but also absorb the heat generated by thermal runaway of the battery component 1100 caused by abnormal conditions such as mechanical damage, thereby ensuring the performance and safety of the battery component 1100 to a certain extent.

[0048] It is understandable that, compared with the prior art, the temperature equalization component 1000 of this application has a wide range of applications and can effectively absorb the heat generated by the battery component 1100 during normal charging and discharging, as well as the heat generated by the thermal runaway of the battery component 1100 caused by abnormal conditions such as mechanical damage, thereby ensuring the performance and safety of the battery component 1100 to a certain extent.

[0049] In the description of this utility model, features defined as "first" and "second" may explicitly or implicitly include one or more of the features, used to distinguish and describe features, without any order or importance.

[0050] It is worth noting that this application fills the temperature equalization space 110 with a liquid working fluid. Compared with the semi-solid working fluid used in the prior art, the liquid working fluid has strong fluidity and can achieve the effect of timely replenishment of working fluid, thereby improving the working performance of the temperature equalization component 1000.

[0051] It should be noted that the battery component 1100 mentioned above can be understood as a battery module.

[0052] It should also be noted that the battery module 1100 to which this application applies is not limited to the blade battery module 1100, but can also be a hard-shell battery with other packaging forms, such as cylindrical batteries or VDA square batteries.

[0053] Among them, VDA square battery refers to square power battery that conforms to the standard size of the German Association of the Automotive Industry (VDA).

[0054] In some embodiments, the first part 100 and the second part 200 are both metal sheets. The first part 100 and the second part 200 may be made of metals such as copper or aluminum. Since metals have good thermal conductivity, the first part 100 and the second part 200 can better absorb and conduct heat from the battery assembly 1100, thereby improving the working performance of the temperature equalization assembly 1000.

[0055] In a specific example, the first part 100 is used to absorb and conduct heat from the battery module 1100, and the second part 200 is used to dissipate heat from the temperature equalization space 110 to the external environment, thereby maximizing the performance of the temperature equalization module 1000.

[0056] In some embodiments, the liquid working fluid is a phase change material, and a temperature homogenization channel 111 is defined within the temperature homogenization space 110 (the specific structure of the temperature homogenization channel 111 can be found in...). Figure 6 The liquid working fluid flows along the temperature equalization channel 111. Phase change material (PCM) is a substance that can absorb or release a large amount of latent heat within a specific temperature range. It achieves energy storage and release through changes in state (such as solid-liquid or liquid-gas), possessing highly efficient thermal management capabilities. Therefore, by setting the liquid working fluid as PCM, it is beneficial to utilize the liquid working fluid to absorb the heat generated by the battery module 1100, thereby achieving the purpose of utilizing the temperature equalization component 1000 to absorb the heat generated by the battery module 1100, ensuring the working performance of the temperature equalization component 1000, and thus ensuring that the battery module 1100 can remain within its normal operating temperature range.

[0057] Meanwhile, by defining a temperature equalization channel 111 within the temperature equalization space 110, and allowing the liquid working fluid to flow along the temperature equalization channel 111, the liquid working fluid can flow fully within the temperature equalization space 110, ensuring the heat exchange effect of the liquid working fluid to a certain extent. This allows the liquid working fluid to dissipate heat to different locations of the battery module 1100, further improving the working performance of the temperature equalization module 1000.

[0058] In some embodiments, combined with Figures 1-5 As shown, the battery module 1100 includes multiple battery cells 1110. This application can absorb most of the heat generated by the runaway of the battery cells 1110 through the sensible heat and latent heat of phase change of the liquid working medium, thereby reducing the heat transfer of adjacent battery cells 1110 to a certain extent, avoiding heat diffusion, and thus ensuring the safety of the battery module 1100.

[0059] In one embodiment, the liquid working fluid is water or an aqueous solution of ethylene glycol, which has high thermal conductivity and phase change efficiency, so that the liquid working fluid can have excellent heat exchange effect, thereby improving the heat exchange capacity of the temperature equalization component 1000.

[0060] In a specific example, the boiling point of the liquid working medium is 60℃-120℃. Considering that the liquid working medium must meet the characteristics of being non-toxic, harmless and not easily flammable, this application selects water as the liquid working medium. In actual working conditions, the initial boiling point temperature can be set by adjusting the internal pressure of the temperature equalization component 1000.

[0061] With the above settings, in a specific example, when the local temperature of the battery component 1100 is too high, the heat will be transferred to the first part 100, and the first part 100 will then transfer the heat to the liquid working fluid. The liquid working fluid absorbs heat, and when the heat absorbed by the liquid working fluid reaches a certain temperature, the liquid working fluid begins to undergo a phase change, resulting in a reduction of the liquid working fluid in a local area of ​​the temperature equalization space 110. At this time, the liquid working fluid in other areas of the temperature equalization space 110 can flow through the temperature equalization channel 111 to the locally vaporized area in the temperature equalization space 110, so that the locally vaporized area in the temperature equalization space 110 can continue to absorb heat, thereby improving the heat dissipation effect of the temperature equalization component 1000.

[0062] Meanwhile, when the vaporized liquid working fluid rises and encounters the second part 200, the liquid working fluid begins to liquefy. The liquefied liquid falls directly into the temperature equalization channel 111 due to gravity, thereby realizing the recycling of the liquid working fluid and further improving the heat dissipation effect of the temperature equalization component 1000.

[0063] In some embodiments, the width of the temperature distribution channel 111 ranges from 2mm to 30mm. It should be noted that the width of the temperature distribution channel 111 mentioned here can be understood as... Figure 6 As shown in the figure, when the width of the temperature equalization channel 111 is too wide, the flow of the liquid working fluid will be slow. When the width of the temperature equalization channel 111 is too narrow, the flow resistance of the liquid working fluid will increase and the temperature equalization component 1000 will be too thick, which will greatly reduce the energy density of the battery pack 2000 and is not conducive to the heat exchange of the temperature equalization component 1000.

[0064] In summary, this application sets the width of the temperature equalization channel 111 to a range of 2mm-30mm, which facilitates the improvement of the heat exchange performance of the liquid working fluid, thereby improving the heat exchange effect of the temperature equalization component 1000.

[0065] Specifically, the width of the uniform temperature flow channel 111 is 2mm, 5mm, 10mm, 15mm, 20mm, 25mm or 30mm, etc., and this application does not impose any restrictions.

[0066] In some embodiments, combined with Figure 1 , Figure 5 and Figure 6As shown, the temperature equalization component 1000 is adapted to be disposed on the top of the battery assembly 1100, and the structural column 300 is disposed in the first part 100 and spaced apart from the second part 200. By placing the temperature equalization component 1000 on top of the battery assembly 1100, the liquid working fluid will preferentially fill the bottom of the temperature equalization component 1000 under the influence of gravity. If the temperature equalization component 1000 is placed at the bottom of the battery assembly 1100, the heat absorption effect of the temperature equalization component 1000 on the battery assembly 1100 will be poor. Therefore, this application places the temperature equalization component 1000 on top of the battery assembly 1100 so that the return direction of the liquid working fluid is the same as the direction of gravity, thereby utilizing gravity to achieve the return of the liquid working fluid, allowing the liquid to be placed close to the battery assembly 1100, and improving the temperature equalization effect of the temperature equalization component 1000.

[0067] Meanwhile, by setting the structural column 300 in the first part 100 and spaced apart from the second part 200, on the one hand, it is convenient to use the first part 100 to support the structural column 300, thereby improving the positional stability of the structural column 300. At the same time, the structural column 300 can increase the heat exchange area of ​​the first part 100, thereby improving the heat exchange efficiency of the first part 100 to the battery module 1100, and thus improving the heat exchange effect of the temperature equalization module 1000 to the battery module 1100. On the other hand, it prevents the heat of the structural column 300 from being transferred to the second part 200, so that the temperature of the second part 200 can be lower than the temperature of the first part 100, thereby facilitating the liquefaction of the gaseous working fluid using the second part 200 and effectively improving the heat exchange effect of the temperature equalization module 1000.

[0068] Optionally, the structural column 300 is a turbulence-inducing column. This can be understood as follows: when the temperature equalization component 1000 is located on top of the battery assembly 1100, the structural column 300 is positioned on the first part 100 and spaced apart from the second part 200, thus forming a turbulence-inducing column. On the one hand, the turbulence-inducing column can promote the liquid working fluid from ordered flow to disordered vortex flow, that is, promote the liquid working fluid from laminar flow to turbulent flow, allowing the liquid working fluid to better exchange heat. On the other hand, the turbulence-inducing column can, to a certain extent, increase the heat exchange area of ​​the temperature equalization component 1000, thereby improving the heat exchange efficiency of the temperature equalization component 1000 on the battery assembly 1100.

[0069] In some embodiments, combined with Figure 5 and Figure 6 As shown, the structural columns 300 include multiple columns, which are spaced apart within the temperature equalization space 110, and a temperature equalization flow channel 111 is defined between two adjacent structural columns 300. The multiple structural columns 300 increase the contact area between the liquid working fluid and the temperature equalization component 1000 to a certain extent, thereby improving the heat exchange effect of the temperature equalization component 1000.

[0070] Meanwhile, by using two adjacent structural columns 300 to define the temperature equalization channel 111, the molding difficulty of the temperature equalization channel 111 can be reduced, thereby allowing the liquid working fluid to flow smoothly in the temperature equalization space 110, so that the liquid working fluid can fully exchange heat with the battery module 1100.

[0071] It should also be noted that, through the above-mentioned configuration, the temperature equalization component 1000 adopts a grid-type flow channel plate design, that is, the temperature equalization flow channel 111 is defined between two adjacent structural columns 300. Compared with the flow of liquid working fluid in a flat plate, the turbulence of the liquid working fluid in this application is more intense, which has a better turbulence effect on the liquid working fluid. At the same time, the structural columns 300 increase the heat exchange area to a certain extent, further increasing the heat transfer efficiency of the liquid working fluid, and also increasing the local pressure drop of the liquid working fluid to a certain extent, thereby increasing the flow velocity of the liquid working fluid and ensuring the heat exchange effect of the liquid working fluid.

[0072] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0073] In a specific example, the structural column 300 blocks and guides the flow, forcing the liquid working fluid to diffuse in all directions of the uniform temperature space 110, thereby filling the dead corners of the uniform temperature space 110 and ensuring the heat exchange effect of the liquid working fluid.

[0074] In some embodiments, the temperature equalization component 1000 is adapted to be disposed on top of the battery assembly 1100, and the structural column 300 is disposed in the second portion 200 and spaced apart from the liquid working fluid. That is, it is not limited to the structural column 300 being disposed in the first portion 100, but can also be disposed in the second portion 200. On the one hand, it is convenient to use the second portion 200 to support the structural column 300, thereby improving the positional stability of the structural column 300. On the other hand, the structural column 300 can also increase the heat exchange area of ​​the second portion 200 to a certain extent, thereby improving the heat dissipation efficiency of the second portion 200, and thus improving the heat exchange effect of the temperature equalization component 1000 on the battery assembly 1100.

[0075] Meanwhile, by separating the structural column 300 located in the second part 200 from the liquid working medium, the liquid working medium can be prevented from directly contacting the structural column 300 and the second part 200, so that the temperature of the second part 200 can be lower than the temperature of the first part 100, thereby facilitating the liquefaction of the gaseous working medium using the second part 200 and effectively improving the heat exchange effect of the temperature equalization component 1000.

[0076] Furthermore, in the above embodiments, when the liquid working medium is a phase change material, the structural column 300 is disposed in the first part 100 and spaced apart from the second part 200, or the structural column 300 is disposed in the second part 200 and spaced apart from the liquid working medium, so as to ensure that when the phase change material comes into contact with the second part 200 or the structural column 300 disposed in the second part 200 after vaporization and phase change, it can also be cooled and condensed into a liquid working medium, so as to realize the reflux of the liquid working medium, maintain and accelerate the temperature uniformity effect of the temperature uniformity component 1000.

[0077] In some embodiments, the cross-sectional shape of the structural column 300 along the horizontal direction may be rectangular, hexagonal, or circular, etc.

[0078] In some embodiments, the structural column 300 satisfies the following relationship: The liquid working fluid has a first liquid surface in contact with the first part 100 and a second liquid surface near the second part 200. The height of the structural column 300 is greater than or equal to the distance between the first and second liquid surfaces. P is the perimeter of the cross-section of the structural column 300 in contact with the second liquid surface, A is the cross-sectional area of ​​the structural column 300 in contact with the first liquid surface, and h is the cross-sectional area of ​​the structural column 300 in contact with the first liquid surface. l The distance between the first and second liquid surfaces is given, and the cross-section is perpendicular to the axis of the structural column 300. It should be noted that the cross-section of the structural column 300 should not be too large to avoid wasting the equalization space 110, nor should it be too small to avoid the structural column 300 losing its fluid separation function. Based on this, this application sets... This is to ensure the heat exchange effect of the liquid working fluid.

[0079] In addition, the area of ​​the structural column 300 will directly affect the width of the temperature equalization channel 111. When the temperature equalization channel 111 is too wide, the flow of the liquid working fluid will be more gradual, resulting in poor heat exchange effect of the liquid working fluid. When the temperature equalization channel 111 is too narrow, it will lead to an increase in the flow resistance of the liquid working fluid.

[0080] Therefore, by optimizing the flow channel width of the temperature equalization channel 111 and the cross-section of the structural column 300, the heat exchange effect of the temperature equalization module 1000 can be guaranteed to a certain extent, thereby improving the performance and safety of the battery module 1100.

[0081] It should be noted that after multiple uniform temperature flow channels 111 are molded together, a grid-type flow channel can be formed within the uniform temperature space 110. To prove that the heat transfer efficiency of the grid-type flow channel is higher, this application simulated the flat plate flow channel and the grid-type flow channel. The structural column 300 in the grid-type flow channel is selected as a square column. The cross-section of the structural column 300 in contact with the second liquid surface and the cross-section in contact with the first liquid surface are both square. The side length of the cross-section of the structural column 300 is 20mm, the width of the uniform temperature flow channel 111 is 20mm, and the liquid level of the working fluid is 8mm. Under the same local heat source and initial state, it is found that the temperature of the first part 100 of the uniform temperature component 1000 is lower than that of the structural component with the flat plate flow channel, thus proving that the uniform temperature component 1000 of this application is superior to the traditional uniform temperature component with the flat plate flow channel.

[0082] In some embodiments, such as Figure 6 As shown, the first part 100 and / or the second part 200 are provided with a pressure relief valve 120. The pressure relief valve 120 is configured to rupture after a set pressure is reached inside the temperature equalization space 110 to release the gas inside the temperature equalization space 110. It should be noted that when a large amount of liquid working fluid inside the temperature equalization component 1000 vaporizes, the pressure inside the temperature equalization space 110 will increase. If the pressure inside the temperature equalization space 110 cannot be released at this time, on the one hand, there will be a problem of gas phase change, and on the other hand, there may be a problem of the temperature equalization component 1000 expanding or even exploding, affecting the working performance of the temperature equalization component 1000.

[0083] Based on this, this application provides a pressure relief valve 120. When the pressure inside the uniform temperature space 110 reaches the set pressure, the pressure relief valve 120 breaks. At this time, excess gas will escape from the uniform temperature space 110, which will reduce the pressure inside the uniform temperature space 110 and further enable the liquid working fluid to undergo effective phase change.

[0084] The aforementioned provision of a pressure relief valve 120 in the first part 100 and / or the second part 200 can be understood as the first part 100 being provided with a pressure relief valve 120, or the second part 200 being provided with a pressure relief valve 120, or both the first part 100 and the second part 200 being provided with a pressure relief valve 120.

[0085] In some embodiments, the pressure relief valve 120 is a pressure relief plate with a weak area. The first part 100 and / or the second part 200 are provided with pressure relief ports. The pressure relief plate is installed to the pressure relief ports. When the internal pressure of the uniform temperature space 110 reaches the set pressure, the weak area is damaged. At this time, the excess gas escapes from the uniform temperature space 110 through the weak area, so as to achieve the purpose of discharging the gas in the uniform temperature space 110.

[0086] In some embodiments, combined with Figure 5 and Figure 6As shown, the temperature equalization assembly 1000 also includes a support member 400, which is disposed within the temperature equalization space 110. The support member 400 engages with the first part 100 and the second part 200 respectively. The support member 400 can stably support the first part 100 and the second part 200, thereby improving the structural strength of the first part 100 and the second part 200 to a certain extent, thus improving the structural stability of the temperature equalization assembly 1000 and ensuring the working performance of the temperature equalization assembly 1000.

[0087] In some embodiments, the support member 400 may be welded or bonded to the first part 100 and the second part 200 respectively to achieve a stop-fitting between the support member 400 and the first part 100 and the second part 200 respectively.

[0088] In some other embodiments, the support member 400 and the second part 200 may not be connected, but only abutted together.

[0089] In some embodiments, the support member 400 has a low thermal conductivity to prevent heat from the first part 100 from being transferred to the second part 200 through the support member 400. This allows the temperature of the second part 200 to be lower than that of the first part 100. On the one hand, this allows the liquid working fluid to liquefy when it rises and encounters the second part 200, facilitating the recycling of the liquid working fluid. On the other hand, it facilitates heat dissipation using the second part 200, improving the performance of the temperature equalization component 1000.

[0090] In some embodiments, combined with Figure 5 and Figure 6 As shown, the support member 400 and the structural column 300 are spaced apart, and a uniform temperature flow channel 111 is formed between the support member 400 and the structural column 300. This further reduces the molding difficulty of the uniform temperature flow channel 111, thereby allowing the liquid working fluid to flow more smoothly in the uniform temperature space 110, so that the liquid working fluid can fully exchange heat with the battery assembly 1100 and ensure the heat exchange effect of the liquid working fluid.

[0091] In some embodiments, the support member 400 is a water-absorbing member. This allows the support member 400 to absorb the liquid working medium. When the vaporized liquid working medium rises and encounters the second part 200 and liquefies, the support member 400 can guide the liquid working medium to flow into the uniform temperature channel 111, thus realizing the recycling of the liquid working medium.

[0092] In summary, when the vaporized liquid working fluid rises and encounters the second part 200, the vaporized liquid working fluid begins to liquefy. Part of the liquefied liquid falls directly into the temperature equalization channel 111 due to gravity, while the other part can flow down along the structure of the support 400 through the guiding effect of the support 400 and enter the temperature equalization channel 111, thereby realizing the recycling of the liquid working fluid and further improving the heat dissipation effect of the temperature equalization component 1000.

[0093] In some embodiments, the support member 400 may be made of a material with good water absorption properties, such as expanded perlite or porous ceramic, so that the support member 400 is formed as a water-absorbing member.

[0094] In summary, the support 400 has three functions: first, it separates the liquid working medium; second, it stably supports the first part 100 and the second part 200; and third, it guides the flow, facilitating the return of the liquid working medium to the uniform temperature channel 111.

[0095] In some embodiments, a heat sink (not shown) is provided on the side of the second part 200 facing away from the temperature equalization space 110. The heat sink can increase the heat dissipation area of ​​the temperature equalization assembly 1000, making it easier to dissipate the heat on the second part 200 to the external environment more quickly, thereby improving the heat exchange effect of the temperature equalization assembly 1000 to a certain extent and ensuring the safety of the battery assembly 1100.

[0096] In some embodiments, the heat sink is a heat sink fin protruding from the second portion 200 to increase the heat dissipation area of ​​the second portion 200.

[0097] In other embodiments, when the temperature equalization component 1000 is installed in a vehicle, the second part 200 can be connected to other metal parts or body materials with good thermal conductivity and large heat capacity. At the same time, the outer interface with a high heat transfer coefficient, such as the metal shell of the vehicle body, is given priority. This can enhance the heat dissipation effect of the second part 200 to a certain extent, avoid the battery component 1100 from getting too hot, and ensure the safety of the battery component 1100.

[0098] In some embodiments, combined with Figure 5 and Figure 6 As shown, the temperature equalization assembly 1000 also includes a heat-insulating seal 500, which is disposed at the connection between the first part 100 and the second part 200. The heat-insulating seal 500 is used to block the heat from the first part 100 from being conducted to the second part 200, thereby maintaining the low temperature state of the second part 200. This facilitates the liquefaction of the vaporized liquid working fluid and improves the heat dissipation performance of the second part 200.

[0099] In a specific example, when the local temperature of the battery module 1100 is too high, the heat will be transferred to the first part 100, which will then transfer the heat to the liquid working medium. When the heat absorbed by the liquid working medium reaches a certain temperature, the liquid working medium begins to undergo a phase change. The vaporized liquid working medium begins to liquefy when it encounters the cooler second part 200. Since the vaporized liquid working medium needs to release heat to liquefy into liquid, the second part 200 can absorb the released heat and dissipate the absorbed heat to the external environment, thereby achieving the heat dissipation performance of the temperature equalization module 1000.

[0100] In some embodiments, the thermal insulation seal 500 may be made of materials such as sealant or thermal insulation gasket, and this application does not limit the scope of the invention.

[0101] It is worth noting that the first part 100 and the second part 200 are sealed together by the heat insulation seal 500. The first part 100, the heat insulation seal 500 and the second part 200 together constitute the outer shell of the temperature equalization component 1000, thereby ensuring to a certain extent that other components inside the temperature equalization component 1000 are protected from external impacts and improving the working performance of the temperature equalization component 1000.

[0102] The battery pack 2000 of this utility model is described below with reference to the accompanying drawings.

[0103] like Figure 1 As shown, a battery pack 2000 according to an embodiment of the present utility model includes: a battery assembly 1100 and a temperature equalization assembly 1000.

[0104] Among them, combined Figures 1-5 As shown, the battery assembly 1100 includes a plurality of battery cells 1110, which are arranged along a first direction.

[0105] Combination Figures 1-5 As shown, the temperature equalization component 1000 is disposed on one side of the battery assembly 1100 in the second direction, which intersects with the first direction. The temperature equalization component 1000 is the aforementioned temperature equalization component 1000, and its specific structure will not be described in detail here.

[0106] It should be noted that the first direction mentioned above can be understood as... Figure 1 The Y direction shown in the figure, the second direction can be understood as... Figure 1 As shown in the Z direction, by arranging multiple battery cells 1110 along the first direction, the battery cells 1110 can be more tightly attached together, which to a certain extent improves the space utilization of the battery pack 2000 and is conducive to increasing the capacity of the battery pack 2000.

[0107] Meanwhile, by placing the temperature equalization component 1000 on one side of the battery assembly 1100 in the second direction, not only can the temperature equalization component 1000 exchange heat with the contact surface of the battery assembly 1100 in the second direction, but the temperature equalization component 1000 can also face multiple battery cells 1110 at the same time, which facilitates the use of the temperature equalization component 1000 to dissipate heat from multiple battery cells 1110. This can prevent safety accidents caused by excessive local temperature of the battery assembly 1100 and improve the safety of the battery pack 2000.

[0108] According to the embodiment of the present utility model, the battery pack 2000, by adopting the aforementioned temperature equalization component 1000, can improve the performance and safety of the battery pack 2000 to a certain extent.

[0109] Furthermore, since the temperature equalization component 1000 of this application has a simple structure, the heat exchange function of the temperature equalization component 1000 for the battery component 1100 is easy to implement, thereby effectively improving the safety of the battery pack 2000.

[0110] It should be noted that in the prior art, the temperature distribution element is usually placed between two adjacent battery cells 1110, which increases the volume of the battery pack and consequently leads to a decrease in the energy density of the battery pack. In addition, in order to achieve the heating function, thick film circuits are added on both sides of the temperature distribution element, which increases the thermal resistance.

[0111] To address the aforementioned issues, this application places the temperature-equalizing component 1000 on one side of the battery pack 1100 in the second direction. Firstly, this allows the temperature-equalizing component 1000 to cover a larger number of battery cells 1110, thus reducing the number of temperature-equalizing components and simplifying the structure of the battery pack 2000. Secondly, it prevents the temperature-equalizing component 1000 from occupying the space between adjacent battery cells 1110, thereby reducing the volume of the battery pack 2000 and increasing its energy density. Thirdly, it prevents the temperature-equalizing component 1000 from affecting the thermal resistance between adjacent battery cells 1110, thus ensuring the safety of the battery pack 2000 to a certain extent.

[0112] In some embodiments, such as Figure 1As shown, the temperature equalization component 1000 is disposed on the upper side of the battery assembly 1100. It should be noted that, due to gravity, the liquid working fluid will preferentially fill the bottom of the temperature equalization component 1000. If the temperature equalization component 1000 is disposed on the bottom of the battery assembly 1100, the heat absorption effect of the temperature equalization component 1000 on the battery assembly 1100 will be poor. Therefore, this application disposes of the temperature equalization component 1000 on the upper side of the battery assembly 1100 so that the return direction of the liquid working fluid is the same as the direction of gravity. This allows the return of the liquid working fluid to be realized by utilizing gravity, enabling the liquid to be placed close to the battery assembly 1100 and improving the temperature equalization effect of the temperature equalization component 1000.

[0113] This application primarily addresses the situation where one or more individual cells 1110 in the battery module 1100 experience thermal runaway. When the local temperature of the battery module 1100 becomes excessively high, heat is transferred to the first part 100, which then transfers the heat to the liquid working fluid. Since the first part 100 is combined with the structural column 300, it can increase the heat transfer area to a certain extent. The liquid working fluid absorbs heat, and when the heat absorbed by the liquid working fluid reaches a certain temperature, the liquid working fluid begins to undergo a phase change, resulting in a reduction of the liquid working fluid in a local area of ​​the temperature equalization space 110. At this time, the liquid working fluid in other areas of the temperature equalization space 110 can flow through the temperature equalization channel 111 to the locally vaporized area in the temperature equalization space 110, so that the locally vaporized area in the temperature equalization space 110 can continue to absorb heat, thereby improving the heat dissipation effect of the temperature equalization module 1000.

[0114] Meanwhile, since the temperature of the second part 200 is lower than that of the first part 100, when the vaporized liquid working medium rises and encounters the second part 200, the vaporized liquid working medium begins to liquefy. Part of the liquefied liquid falls directly into the temperature equalization channel 111 due to gravity, while the other part can flow down along the structure of the support member 400 through the guiding effect of the support member 400 and enter the temperature equalization channel 111, thereby realizing the recycling of the liquid working medium and further improving the heat dissipation effect of the temperature equalization component 1000.

[0115] In some embodiments, the battery pack 2000 further includes a housing, in which the battery assembly 1100 and the temperature-equalizing component 1000 are both disposed. This facilitates the use of the housing to support and protect the battery assembly 1100 and the temperature-equalizing component 1000, thereby improving the positional stability of the battery assembly 1100 and the temperature-equalizing component 1000 and ensuring their working performance. On the other hand, it can also extend the service life of the battery assembly 1100 and the temperature-equalizing component 1000 and reduce the cost of use.

[0116] The following describes the electrical device according to an embodiment of the present invention.

[0117] The electrical device according to an embodiment of the present invention includes: a battery pack 2000.

[0118] Among them, battery pack 2000 is the aforementioned battery pack 2000, and the specific structure of battery pack 2000 will not be described in detail here.

[0119] The electrical device according to the present invention, by employing the aforementioned battery pack 2000, can improve the performance and safety of the electrical device to a certain extent.

[0120] It should be noted that the electrical devices mentioned here can include, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc.

[0121] Among them, electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys; spacecraft can include airplanes, rockets, space shuttles, and spacecraft; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, extrusion drills, concrete vibrators, and electric planers.

[0122] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0123] Figure 6 The illustration shows three pressure relief valves 120 on one side of the temperature equalization component 1000 for illustrative purposes. However, after reading the above technical solution, those skilled in the art will obviously understand that applying this solution to one, two, four or more pressure relief valves 120 would also fall within the protection scope of this utility model.

[0124] The specific structures of the temperature equalization component 1000, battery pack 2000, and other components of the electrical device, such as the battery cell 1110, according to the embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0125] In this specification, the terms "embodiment," "example," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0126] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A temperature equalization component for a battery assembly, characterized in that, include: A first part (100) is adapted to be disposed on the battery assembly; The second part (200) is connected to the side of the first part (100) away from the battery assembly and is sealed to the first part (100). The second part (200) cooperates with the first part (100) to define a temperature equalization space (110), which is filled with a liquid working fluid. Structural column (300) is disposed within the temperature equalization space (110).

2. The temperature equalization component for a battery assembly according to claim 1, characterized in that, The liquid working medium is a phase change material, and a temperature equalization channel (111) is defined within the temperature equalization space (110), and the liquid working medium flows along the temperature equalization channel (111).

3. The temperature equalization component for a battery assembly according to claim 2, characterized in that, The width of the uniform temperature flow channel (111) ranges from 2mm to 30mm.

4. The temperature equalization component for a battery assembly according to claim 2, characterized in that, The temperature equalization component is adapted to be disposed on the top of the battery assembly, and the structural column (300) is disposed on the first part (100) and spaced apart from the second part (200).

5. The temperature equalization assembly for a battery module according to claim 2, characterized in that, The structural columns (300) include a plurality of columns, which are spaced apart in the temperature equalization space (110), and the temperature equalization channel (111) is defined between two adjacent structural columns (300).

6. The temperature equalization assembly for a battery module according to claim 1, characterized in that, The temperature equalization component is adapted to be disposed on the top of the battery assembly, and the structural column (300) is disposed in the second part (200) and spaced apart from the liquid working fluid.

7. The temperature equalization assembly for a battery module according to claim 4, characterized in that, The structural column (300) satisfies the following relationship: Ph l ≥A; The liquid working fluid has a first liquid surface in contact with the first part (100) and a second liquid surface near the second part (200). The height of the structural column (300) is greater than or equal to the distance between the first liquid surface and the second liquid surface. P is the perimeter of the cross-section of the structural column (300) in contact with the second liquid surface; A is the cross-sectional area of ​​the structural column (300) in contact with the first liquid surface; h l The distance between the first liquid surface and the second liquid surface; the cross section is perpendicular to the axis of the structural column (300).

8. The temperature equalization assembly for a battery module according to claim 2, characterized in that, The first part (100) and / or the second part (200) are provided with a pressure relief valve (120) configured to rupture when a set pressure is reached inside the temperature equalization space (110) to release gas inside the temperature equalization space (110).

9. The temperature equalization assembly for a battery module according to claim 4, characterized in that, It also includes a support member (400), which is disposed in the temperature equalization space (110) and the support member (400) is respectively engaged with the first part (100) and the second part (200).

10. The temperature equalization assembly for a battery module according to claim 9, characterized in that, The support member (400) is spaced apart from the structural column (300), and the uniform temperature flow channel (111) is formed between the support member (400) and the structural column (300).

11. The temperature equalization assembly for a battery module according to claim 9, characterized in that, The support (400) is a water-absorbing component.

12. The temperature equalization assembly for a battery module according to claim 1, characterized in that, The second part (200) has a heat dissipation component on the side opposite to the temperature equalization space (110).

13. The temperature equalization assembly for a battery module according to claim 1, characterized in that, It also includes a heat-insulating seal (500) disposed at the connection between the first part (100) and the second part (200).

14. A battery pack, characterized in that, include: A battery assembly comprising a plurality of battery cells (1110) arranged along a first direction; A temperature equalization component, wherein the temperature equalization component is any one of claims 1-13, and the temperature equalization component is disposed on one side of the battery assembly in a second direction, the second direction intersecting the first direction.

15. The battery pack according to claim 14, characterized in that, The temperature equalization component is located on the upper side of the battery assembly.

16. An electrical appliance, characterized in that, Includes the battery pack according to claim 14 or 15.

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