Heat absorption device, battery assembly and electric equipment

Abstract

The utility model provides a heat absorption device, a battery assembly and electric equipment. The heat absorbing device includes an accommodating member and a separator. A containing cavity is defined in the containing component. The partition pieces are arranged in the containing cavity and divide the containing cavity into a plurality of sub containing cavities, at least two sub containing cavities communicate with each other, and the sub containing cavities are used for containing heat absorption materials capable of absorbing heat in a vaporizing mode. The separator plays a role in separating and supporting in the heat absorption device. The separators are arranged in the accommodating cavity to divide the accommodating cavity into the plurality of sub-accommodating cavities, so that effective separation and positioning of the heat-absorbing material are realized. Meanwhile, the separator can also support the heat absorbing material, keep the stable position of the heat absorbing material in the accommodating cavity, prevent the heat absorbing material from moving or accumulating, and ensure the normal operation and performance of the heat absorbing device. The sub-containing cavities communicated with each other in the containing cavity enable gas generated after the heat absorption materials are vaporized to flow between the adjacent cavities, the gas pressure in the containing cavity is balanced, and heat transfer between the heat absorption materials can be promoted.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and more specifically to a heat absorption device, a battery assembly and electrical equipment. Background Art

[0002] At present, phase change materials can be used to suppress thermal runaway and heat spread of batteries. When thermal diffusion occurs in the battery cell, excessive heat is generated, causing the phase change material to undergo phase change (usually vaporization) in a short period of time, generating a large amount of gas, which pushes the unvaporized phase change material, causing the phase change material to be redistributed, affecting the thermal management effect of the battery assembly.

[0003] Therefore, it is necessary to provide a heat absorption device, a battery assembly and an electrical device to at least partially solve the above problems. Utility Model Content

[0004] A series of simplified concepts are introduced in the utility model content section, which will be further described in detail in the detailed implementation section. The utility model content section of the utility model does not mean to attempt to define the key features and essential technical features of the technical solution claimed for protection, nor does it mean to attempt to determine the scope of protection of the technical solution claimed for protection.

[0005] In order to at least partially solve the above problems, the first aspect of the present invention provides a heat absorption device, comprising:

[0006] a containing member, wherein a containing cavity is defined in the containing member; and

[0007] A separator is disposed in the accommodating chamber and divides the accommodating chamber into a plurality of sub-accommodating chambers, and at least two of the sub-accommodating chambers are connected, and the sub-accommodating chambers are used to accommodate heat-absorbing materials that can vaporize and absorb heat.

[0008] According to the heat absorbing device of the first aspect of the utility model, the partition plays a role of partitioning and supporting in the heat absorbing device. By setting the partition in the receiving chamber, the receiving chamber is divided into a plurality of sub-receiving chambers, thereby achieving effective separation and positioning of the heat absorbing material. At the same time, the partition can also support the heat absorbing material, maintain its stable position in the receiving chamber, prevent the material from moving or accumulating, and ensure the normal operation and performance of the heat absorbing device. The interconnected sub-receiving chambers in the receiving chamber allow the gas generated after the heat absorbing material is vaporized to flow between adjacent sub-receiving chambers, balance the gas pressure inside the receiving chamber, and promote heat transfer between the heat absorbing materials.

[0009] Optionally, the partition is configured as a grille having grille holes, and the grille holes form the sub-accommodation cavity.

[0010] Optionally, the separator comprises:

[0011] A first partition, the first partition extends along a first direction, and a plurality of the first partitions are spaced apart along a second direction;

[0012] The second separator extends along the second direction, and a plurality of the second separators are arranged at intervals along the first direction, and the second separator is connected to the first separator.

[0013] Optionally, the partition has a venting gap.

[0014] Optionally, the separator comprises:

[0015] A first partition, the first partition extends along a first direction, and a plurality of the first partitions are spaced apart along a second direction;

[0016] A second separator, the second separator extends along the second direction, and a plurality of the second separators are arranged at intervals along the first direction; wherein,

[0017] A plurality of the first partitions are arranged at intervals along the first direction to form the exhaust gap; and / or

[0018] A plurality of the second partitions are arranged at intervals along the second direction to form the exhaust gap.

[0019] Optionally, the thickness b of the separator along the thickness direction is 1 to 3 mm.

[0020] Optionally, the partition is provided with an exhaust port, and the exhaust port is used to connect adjacent sub-accommodation chambers.

[0021] Optionally, the partition between any two adjacent sub-accommodation chambers is provided with the exhaust port.

[0022] Optionally, the exhaust ports of the opposite partitions are arranged opposite to each other.

[0023] Optionally, along the thickness direction, the size c of the exhaust port occupies 1 / 3 to 1 / 2 of the thickness b of the separator; and / or

[0024] Along the extending direction of the partition where the exhaust port is located, the length d of the exhaust port is 3 to 5 mm.

[0025] Optionally, the containing member includes packaging films arranged at intervals along a thickness direction.

[0026] Optionally, the packaging film is provided with a sealing portion and a weak portion, and the sealing strength of the sealing portion is higher than the sealing strength of the weak portion.

[0027] Optionally, the sealing portion and the weak portion are connected end to end to form a ring; and / or

[0028] The sealing strength of the sealing portion is 4 to 6 times the sealing strength of the weak portion; and / or

[0029] The length a of the weak portion is 1 to 5 mm.

[0030] Optionally, at least two of the sub-accommodating cavities are arranged side by side along the first direction; and / or

[0031] At least two of the sub-accommodating cavities are arranged side by side along the second direction.

[0032] Optionally, the volume of the heat absorbing material in each sub-accommodating cavity accounts for 50% to 90% of the volume of the sub-accommodating cavity in which it is located.

[0033] Optionally, the heat absorbing material is in granular form.

[0034] The second aspect of the utility model provides a battery assembly, including a battery cell and the above-mentioned heat absorption device;

[0035] The heat absorption device is in contact with the battery core.

[0036] According to the battery assembly adopted in the second aspect of the utility model, the heat absorption device can quickly absorb the heat around the battery core, can effectively control the temperature of the battery core, prevent overheating, and thus improve the safety of the battery assembly.

[0037] A third aspect of the utility model provides an electrical device, comprising the above-mentioned battery assembly.

[0038] According to the third aspect of the utility model, a technical effect similar to that of a battery assembly is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The following drawings of the embodiments of the present invention are used as part of the present invention for understanding the present invention. The drawings show the embodiments of the present invention and their descriptions, and are used to explain the principles of the present invention. In the drawings,

[0040] Figure 1 It is an exploded three-dimensional schematic diagram of a heat dissipation device according to a preferred embodiment of the utility model;

[0041] Figure 2 is a three-dimensional schematic diagram of a receiving member of the first embodiment;

[0042] Figure 3 for Figure 2 A magnified schematic diagram of part A;

[0043] Figure 4is a three-dimensional schematic diagram of a receiving member of a second embodiment;

[0044] Figure 5 for Figure 4 A magnified schematic diagram of part B;

[0045] Figure 6 This is an exploded three-dimensional schematic diagram of a battery assembly according to a preferred embodiment of the utility model;

[0046] Figure 7 An exploded top view of a battery assembly according to a preferred embodiment of the present invention; and

[0047] Figure 8 for Figure 7 An enlarged schematic diagram of part C in FIG.

[0048] Description of Reference Numerals

[0049] 1: Heat absorption device

[0050] 10: Accommodate components

[0051] 101: Accommodation cavity

[0052] 1011: Sub-accommodation chamber

[0053] 11: Sealing part

[0054] 12: Weakness

[0055] 2: Battery Cell

[0056] 20: Separator

[0057] 201: Exhaust port

[0058] 202: Exhaust gap

[0059] 21: First separator

[0060] 22: Second separator

[0061] 30: Heat absorbing material

[0062] D1: First direction

[0063] D2: Second direction

[0064] DW: thickness direction DETAILED DESCRIPTION

[0065] In the following description, a large number of specific details are given to provide a more thorough understanding of the present invention. However, it is obvious to those skilled in the art that the present invention can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present invention, some technical features known in the art are not described.

[0066] In this document, ordinal numbers such as "first" and "second" cited in the present invention are merely identifiers and do not have any other meanings, such as a specific order, etc. Moreover, for example, the term "first component" itself does not imply the existence of the "second component", and the term "second component" itself does not imply the existence of the "first component".

[0067] In this document, “upper”, “lower”, “front”, “back”, “left”, “right”, etc. are only used to indicate the relative position relationship between related parts, rather than to limit the absolute positions of these related parts.

[0068] In this document, “equal”, “same”, etc. are not strictly limited in a mathematical and / or geometric sense, but also include errors that can be understood by those skilled in the art and are allowed in manufacturing or use.

[0069] Unless otherwise stated, the numerical ranges herein include not only the entire range within its two endpoints but also include several sub-ranges contained therein.

[0070] Now, exemplary embodiments according to the present utility model will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in a variety of different forms and should not be interpreted as being limited to the embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of the present utility model thorough and complete, and to fully convey the concepts of these exemplary embodiments to those of ordinary skill in the art.

[0071] Phase change materials have important application value in suppressing thermal runaway and heat spread of batteries. Phase change materials have high energy storage density and stability. The heat released or absorbed during the phase change process is more efficient than many other heat storage methods. Usually, phase change materials need to be packaged for effective use in specific applications. Phase change materials change from vaporization to gas phase and expand in volume, but due to the limitations of the packaging material, the gas can only cause a sharp increase in internal pressure in a limited space. Usually, phase change materials in liquid or gel state still have a certain fluidity. Excessive internal pressure can easily drive the liquid or gel-like phase change material to flow, or even squeeze and cause the package to rupture, resulting in a large loss of phase change material, which ultimately affects the heat absorption effect of the phase change material and cannot suppress the thermal runaway and heat spread of the battery.

[0072] The phase change material is generally in a continuous and complete solid state during use. The phase change material vaporizes and expands under the influence of the high-temperature runaway battery cell 2, causing the non-phase change material to be pushed, affecting the heat absorption effect.

[0073] Reference Figure 1 The utility model provides a heat absorbing device 1, comprising a containing member 10 and a partition 20. A containing chamber 101 is defined in the containing member 10. The partition 20 is disposed in the containing chamber 101, thereby dividing the containing chamber 101 into a plurality of sub-containing chambers 1011, and the sub-containing chambers 1011 are used to contain heat absorbing materials 30 that can vaporize and absorb heat. In the utility model, the partition 20 plays a role of separation and support in the heat absorbing device 1. By arranging the partition 20 in the containing chamber 101, the containing chamber 101 is divided into a plurality of sub-containing chambers 1011, thereby achieving effective separation and positioning of the heat absorbing material 30. At the same time, the partition 20 can also support the heat absorbing material 30, maintain its stable position in the containing chamber 101, prevent the heat absorbing material 30 from moving or accumulating, and ensure the normal operation and performance of the heat absorbing device 1. The interconnected sub-receiving chambers 1011 in the receiving chamber 101 allow the gas generated after the endothermic material 30 is vaporized to flow between adjacent sub-receiving chambers 1011 , thereby balancing the gas pressure inside the receiving chamber 101 and promoting heat transfer between the endothermic materials 30 .

[0074] Optionally, the heat-absorbing material 30 is in a granular form. There are gaps between the granular phase change material (i.e., the heat-absorbing material 30), which can serve as an exhaust channel for the vaporized gas, reducing the pushing of other materials that have not undergone phase change, thereby reducing the internal pressure and ensuring that the phase change material fully absorbs heat. The heat-absorbing material 30 has a higher surface area under the same volume, so that heat can be exchanged faster when thermal runaway occurs, and the heat absorption rate of the temperature runaway battery cell 2 is accelerated.

[0075] The heat-absorbing material 30 can absorb heat in a high temperature environment. The heat-absorbing material 30 can be a phase change material, or other materials with the same effect. Preferably, the heat-absorbing material 30 adopts a phase change material, which can be a solid-gas phase change material or a liquid-gas phase change material. In normal use, the phase change material will not undergo a phase change. When the temperature around the heat-absorbing device 1 increases, the phase change material can undergo a phase change after absorbing enough heat, from solid to gas, or from liquid to gas. In the utility model, a solid heat-absorbing material 30 is used. The phase change material is converted into a particle structure for packaging. The conversion method includes physical crushing, or combining with other materials by chemical means to form a solid in microcapsule form or particle form. The main function of using the granular heat-absorbing material 30 is that there must be gaps between the particles. When the phase change occurs due to heat, these gaps can be used as exhaust channels for the vaporized gas, which can reduce the pushing of other materials that have not undergone phase change, and ensure that the phase change material fully absorbs the heat generated by thermal diffusion. On the other hand, the phase change material in the form of particles has a higher surface area than a continuous and complete solid material under the same volume. When thermal runaway occurs, the heat exchange area is larger, and the heat absorption rate of the temperature-runaway battery cell 2 is faster.

[0076] In some embodiments of the present invention, the heat absorbing material 30 is made of hydrogel, composite hydrogel material, microcapsule or particle solid made by combining hydrogel with polymer or inorganic matter, paraffin and its composite materials, and other materials with vaporization heat absorption properties in the prior art.

[0077] like Figure 2-Figure 3 The first embodiment is shown. The partition 20 is constructed as a grid with grid holes, and the grid holes form a sub-accommodation cavity 1011. The grid structure can provide a stable support to prevent the heat absorbing material 30 from moving or accumulating, thereby ensuring the normal operation of the heat absorbing device 1. The sub-accommodation cavity 1011 formed by the grid holes can make the heat absorbing material 30 evenly distributed in the accommodation cavity 101, avoid the heat absorbing material 30 from agglomerating, and improve the heat absorption effect and heat exchange efficiency.

[0078] The partition 20 includes a first partition 21 and a second partition 22. The first partition 21 extends along the first direction D1, and a plurality of first partitions 21 are arranged at intervals along the second direction D2. The second partition 22 extends along the second direction D2, and a plurality of second partitions 22 are arranged at intervals along the first direction D1, and the second partition 22 is connected to the first partition 21. The first partition 21 and the second partition 22 are connected to each other to form a cross support structure, which enhances the overall stability and rigidity, and ensures that the heat sink 1 will not deform or loosen during operation.

[0079] In this embodiment, the separator 20 is an integral member. Optionally, the separator 20 is clamped by the containing member 10 through a pre-tightening force. Alternatively, the separator 20 is connected to the containing member 10 by bonding, clamping or other connection forms. The separator 20 as an integral member can improve its overall stability and structural strength. And the separator 20 can be relatively fixed to the containing member 10 by the above two methods to ensure that it will not loosen or deform during use.

[0080] like Figure 4-5 The second embodiment shown. The partition 20 includes a first partition 21 and a second partition 22. The first partition 21 extends along the first direction D1, and a plurality of first partitions 21 are spaced apart along the second direction D2. The second partition 22 extends along the second direction D2, and a plurality of second partitions 22 are spaced apart along the first direction D1. A plurality of first partitions 21 are spaced apart along the first direction D1 to form an exhaust gap 202. And / or a plurality of second partitions 22 are spaced apart along the second direction D2 to form an exhaust gap 202. The exhaust gap 202 formed by setting a plurality of gaps can serve as a channel for vaporized gas, which helps to smoothly discharge vaporized gas and reduce internal pressure accumulation.

[0081] In this embodiment, the partition 20 is connected to the containing member 10 by bonding, clamping or other connection forms, so that the partition 20 and the containing member 10 are relatively fixed.

[0082] In the aforementioned embodiments, the material of the containing member 10 is plastic, resin composite material, etc. Optionally, the material of the containing member 10 is polyethylene.

[0083] Optionally, the thickness b of the separator 20 along the thickness direction DW is 1-3 mm. The thickness of the receiving member 10 is adapted to the gap width between the battery cells 2 .

[0084] On the basis of the above-mentioned embodiment, the partition 20 is provided with an exhaust port 201, and the exhaust port 201 is used to connect the adjacent sub-accommodation chambers 1011. The exhaust ports 201 are respectively provided in the first partition 21 and the second partition 22. A sub-accommodation chamber 1011 can be provided with a plurality of exhaust ports 201. Optionally, the number of exhaust ports 201 is greater than the number of partitions 20.

[0085] Optionally, the partition 20 between any two adjacent sub-accommodating chambers 1011 is provided with an exhaust port 201 , that is, any two adjacent sub-accommodating chambers 1011 are connected. Specifically, any two adjacent sub-accommodating chambers 1011 can be connected through the exhaust port 201 .

[0086] Optionally, the exhaust ports 201 of the opposite partitions 20 are arranged opposite to each other. That is, the exhaust ports 201 of the first partitions 21 adjacent to each other along the second direction D2 are arranged opposite to each other, and the exhaust ports 201 of the second partitions 22 adjacent to each other along the first direction D1 are arranged opposite to each other. Through the oppositely arranged exhaust ports 201, the gas can flow and be discharged more smoothly, reducing the residence time of the gas in a single sub-accommodating chamber 1011, and preventing the local pressure of the accommodation chamber 101 from being too high.

[0087] Optionally, at least two sub-accommodating cavities 1011 are arranged side by side along the first direction D1. At least two sub-accommodating cavities 1011 are arranged side by side along the second direction D2. By arranging multiple sub-accommodating cavities 1011, effective separation and positioning of the heat absorbing material 30 is achieved.

[0088] Optionally, along the thickness direction DW, the dimension c of the exhaust port 201 accounts for 1 / 3 to 1 / 2 of the thickness b of the partition 20. Optionally, along the extension direction of the partition 20 where the exhaust port 201 is located, the length d of the exhaust port 201 is 3 to 5 mm. The provision of the exhaust port 201 can ensure that the vaporized gas diffuses rapidly and has little effect on the strength of the containing member 10.

[0089] In the present invention, the receiving member 10 includes packaging films arranged at intervals along the thickness direction DW. Figure 1 and Figure 8 As shown, the peripheral areas of the two packaging films are bonded together, and the bonded area and the packaging film form a receiving cavity 101. Optionally, the packaging film is made of a high-temperature resistant thermoplastic material or an aluminum-plastic film. Exemplarily, the packaging film is one of a polyimide film, a polytetrafluoroethylene film, a polyetheretherketone film and a polyphenylene sulfide film. Preferably, the packaging film is made of a polyimide film, which has a temperature resistance of up to 260 to 280°C. By setting the packaging film, good thermal conductivity is provided while reducing the footprint. The packaging film can also be customized by cutting or folding to meet the specific needs of the heat sink 1.

[0090] The packaging film is provided with a sealing portion 11 and a weak portion 12, and the sealing strength of the sealing portion 11 is higher than that of the weak portion 12. When the temperature around the heat absorbing device 1 rises, the heat absorbing material 30 can quickly absorb heat and generate gas, and the air pressure in the accommodating cavity 101 increases. When the air pressure in the accommodating cavity 101 exceeds the pressure bearing capacity of the area with smaller sealing strength (weak portion 12), the sealing structure of the weak portion 12 is destroyed, and the gas is discharged from the accommodating cavity 101 to the exhaust duct preset in the whole package, thereby achieving an efficient heat absorption effect.

[0091] Optionally, the spaced packaging films are sealed and bonded. The sealing and bonding methods include but are not limited to hot pressing, cold pressing and bonding. The sealed and bonded structure formed by these methods can be destroyed under a certain strength. For example, if one side of the seal is subjected to a pressure exceeding its designed bearing capacity, the sealed and bonded structure may be destroyed.

[0092] When the packaging film is sealed and attached by heat pressure, there are the following methods to achieve different sealing strengths.

[0093] 1. Pressure distribution method: Different pressures are applied during the hot pressing process to form different bonding strengths in different areas. Specifically, a hot pressing device with adjustable pressure can be used, or gaskets of different thicknesses can be placed between the packaging film and the substrate, or hot pressing can be performed in batches to control the hot pressing pressures in the area where the sealing part 11 is located and the area where the weak part 12 is located to be different.

[0094] 2. Temperature gradient method: During the hot pressing process, by adjusting the distribution of the temperature gradient, the packaging film in the area where the sealing part 11 is located and the packaging film in the area where the weak part 12 is located can reach different softening degrees, thereby forming different bonding strengths. Specifically, a hot pressing device with multi-temperature zone control can be used, or local heating or cooling can be used during the hot pressing process to achieve temperature gradient control.

[0095] 3. Differentiation of material properties: Select packaging films with different properties to be set on the sealing part 11 and the weak part 12, such as differences in material hardness, material size or adhesion, etc. Specifically, during the hot pressing process, different materials will correspond to different bonding strengths, forming areas with different sealing strengths.

[0096] Fourth, the method of differentiating the hot pressing time: for the packaging film in the area where the sealing part 11 is located and the packaging film in the area where the weak part 12 is located, the hot pressing time can be adjusted to make them experience different hot pressing durations to achieve different bonding strengths. In this way, the packaging film in the area where the sealing part 11 is located and the packaging film in the area where the weak part 12 is located can achieve different sealing strengths in one hot pressing or multiple hot pressings.

[0097] The sealing part 11 and the weak part 12 are connected end to end to form a ring. Through the arrangement of the weak part 12, the gas can be discharged in a directional manner, effectively reducing the temperature and internal pressure, and avoiding heat diffusion. Optionally, there are multiple weak parts 12. Preferably, the weak part 12 is arranged at a non-middle position of the sealing part 11.

[0098] In order to make the weak part 12 react quickly, the sealing strength of the weak part 12 can be adjusted by adjusting parameters such as temperature, pressure or time used in hot pressing sealing, so that when 4 to 6 grams of water vapor undergoes a phase change in the accommodating cavity 101, the sealing of the weak part 12 fails, forming an exhaust channel, thereby playing a role of directional exhaust.

[0099] In order to allow gas to be discharged only from the weak portion 12, the sealing strength of the sealing portion 11 should be adjusted to 4 to 6 times the sealing strength of the weak portion 12. Preferably, the sealing strength of the sealing portion 11 is 6 times the sealing strength of the weak portion 12. Preferably, the length a of the weak portion 12 is 1 to 5 mm.

[0100] In order to maintain the heat absorption capacity of the heat-absorbing material 30 and avoid the squeezing caused by excessive heat-absorbing material 30 during vaporization, the heat-absorbing material 30 will not be completely filled in each grid support, and the proportion of the total volume of the support cavity is approximately between 50% and 90%. That is, the volume of the heat-absorbing material 30 in each sub-receiving cavity 1011 accounts for 50% to 90% of the volume of the sub-receiving cavity 1011 in which it is located. Although the filling rate of the phase change material in the particle state is slightly lower than that of the full filling solution, it is beneficial to reduce the mutual squeezing between the phase change materials during the heat diffusion process, improve the utilization rate of the phase change materials, reduce the cost of the phase change materials, and meet the heat absorption demand of heat diffusion, thereby achieving rapid heat dissipation.

[0101] The utility model also provides a battery assembly, including a battery cell 2 and the above-mentioned heat absorption device 1; the heat absorption device 1 is in contact with the battery cell 2. The heat absorption device 1 can quickly absorb the heat around the battery cell 2, can effectively control the temperature of the battery cell 2, prevent overheating, and thus improve the safety of the battery assembly. When the battery cell 2 has thermal runaway, the heat absorption device 1 can quickly absorb the excess heat around the battery cell 2, thereby effectively reducing the temperature of the battery cell 2, preventing the thermal runaway from further deteriorating, and protecting the surrounding environment and the safety of other components.

[0102] like Figure 6-Figure 7 As shown, in the present application, the heat absorption device 1 is arranged between the battery cells 2. When the battery cell 2 releases a large amount of energy in a short time after thermal runaway, the phase change material located in the heat absorption device 1 absorbs heat through phase change and quickly cools the runaway battery cell 2, thereby reducing the temperature of the runaway battery cell 2, thereby achieving the purpose of suppressing heat diffusion of the battery pack.

[0103] The battery cell 2 is a slender blade battery cell 2, and in practical applications, it can also be a battery cell 2 of other sizes, such as a VDA size square shell battery cell 2. A heat sink 1 is set between every two battery cells 2. In practical applications, the heat sink 1 can also be densely set in the higher temperature area of ​​the same battery pack, and the heat sink 1 can be sparsely set in the lower temperature area.

[0104] The utility model also provides an electrical device, comprising the above-mentioned battery assembly, which has similar technical effects as the battery assembly.

[0105] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art in the technical field of the present invention. The terms used herein are only for describing specific implementation purposes and are not intended to limit the present invention. Terms such as "setting" appearing in this article may indicate that one component is directly attached to another component, or that one component is attached to another component through an intermediate. Features described in this article in one embodiment may be applied to another embodiment alone or in combination with other features, unless the feature is not applicable in the other embodiment or otherwise specified.

[0106] The utility model has been described through the above embodiments, but it should be understood that the above embodiments are only for the purpose of example and description, and are not intended to limit the utility model to the described embodiments. It can be understood by those skilled in the art that more variations and modifications can be made according to the teachings of the utility model, and these variations and modifications all fall within the scope of the protection claimed by the utility model.

Claims

1. A heat absorbing device, characterized in that: include: a containing member, wherein a containing cavity is defined in the containing member; and A separator is disposed in the accommodating chamber and divides the accommodating chamber into a plurality of sub-accommodating chambers, and at least two of the sub-accommodating chambers are connected, and the sub-accommodating chambers are used to accommodate heat-absorbing materials that can vaporize and absorb heat.

2. The heat sink according to claim 1, characterized in that: The partition is configured as a grid having grid holes, and the grid holes form the sub-accommodation chamber.

3. The heat sink according to claim 1, characterized in that: The separator comprises: A first partition, the first partition extends along a first direction, and a plurality of the first partitions are spaced apart along a second direction; The second separator extends along the second direction, and a plurality of the second separators are arranged at intervals along the first direction, and the second separator is connected to the first separator.

4. The heat sink according to claim 1, characterized in that: The partition has a venting gap.

5. The heat sink according to claim 4, characterized in that: The separator comprises: A first partition, the first partition extends along a first direction, and a plurality of the first partitions are spaced apart along a second direction; A second separator, the second separator extends along the second direction, and a plurality of the second separators are arranged at intervals along the first direction; wherein, A plurality of the first partitions are arranged at intervals along the first direction to form the exhaust gap; and / or A plurality of the second partitions are arranged at intervals along the second direction to form the exhaust gap.

6. The heat sink according to claim 1, characterized in that: The thickness b of the separator along the thickness direction is 1 to 3 mm.

7. The heat absorbing device according to any one of claims 1 to 6, characterized in that: The partition is provided with an exhaust port, and the exhaust port is used to connect the adjacent sub-accommodation chambers.

8. The heat sink according to claim 7, characterized in that: The partition between any two adjacent sub-accommodation chambers is provided with the exhaust port.

9. The heat sink according to claim 7, characterized in that: The exhaust ports of the opposite partitions are arranged opposite to each other.

10. The heat sink according to claim 7, characterized in that: In the thickness direction, the size c of the exhaust port occupies 1 / 3 to 1 / 2 of the thickness b of the separator; and / or Along the extending direction of the partition where the exhaust port is located, the length d of the exhaust port is 3 to 5 mm.

11. The heat sink according to any one of claims 1 to 5, characterized in that: The receiving member includes packaging films arranged at intervals in a thickness direction.

12. The heat sink according to claim 11, characterized in that: The packaging film is provided with a sealing portion and a weak portion, and the sealing strength of the sealing portion is higher than the sealing strength of the weak portion.

13. The heat sink according to claim 12, characterized in that: The sealing portion and the weak portion are connected end to end to form a ring; and / or The sealing strength of the sealing portion is 4 to 6 times the sealing strength of the weak portion; and / or The length a of the weak portion is 1 to 5 mm.

14. The heat sink according to any one of claims 1 to 6, characterized in that: At least two of the sub-accommodating chambers are arranged side by side along the first direction; and / or At least two of the sub-accommodating cavities are arranged side by side along the second direction.

15. The heat sink according to any one of claims 1 to 5, characterized in that: The volume of the heat absorbing material in each sub-accommodating cavity accounts for 50% to 90% of the volume of the sub-accommodating cavity where it is located.

16. The heat sink according to any one of claims 1 to 5, characterized in that: The heat absorbing material is in granular form.

17. A battery assembly, characterized in that: Comprising a battery cell and a heat absorption device according to any one of claims 1 to 16; The heat absorption device is in contact with the battery core.

18. An electrical equipment, characterized in that: Comprising a battery assembly according to claim 17.

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