Phase change material bag, heat exchange assembly, battery pack and power utilization system

Abstract

The utility model provides a phase change material bag, a heat exchange assembly, a battery pack and a power utilization system. The phase change material bag comprises a packaging bag and a supporting piece, the supporting piece is arranged in the packaging bag in a surrounding mode, the packaging bag comprises a cavity, and the cavity is used for containing a phase change material. The supporting piece is arranged in the phase-change material bag in a surrounding mode, the overall structural stability of the phase-change material bag can be enhanced, the phase-change material bag can better bear external pressure and loads, and therefore the risks of deformation and damage are reduced, and meanwhile the supporting piece can relieve stress generated by temperature changes and material expansion in the phase-change material bag. Therefore, the possibility of material fatigue and damage is reduced, and the durability of the phase-change material bag is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery packs, and in particular relates to a phase change material bag, a heat exchange component, a battery pack and an electricity system. Background Art

[0002] Phase change material (PCM) is a material that can absorb and release a large amount of energy during energy storage and release, so it has broad application prospects in the field of batteries. However, the density of the phase change material will change before and after the phase change, which will lead to a change in volume. Multiple charge and discharge cycles may cause the material to deform, which will affect the thermal conductivity. Therefore, how to reduce the volume deformation and ensure the consistency of PCM in multiple cycles of charge and discharge is a challenge for existing technologies. Utility Model Content

[0003] The purpose of the utility model is to provide a phase change material bag, a heat exchange component, a battery pack and an electricity system, so as to at least partially solve the problems existing in the related art.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A phase change material bag comprises a packaging bag and a support member, wherein the support member comprises a first support member, and the first support member is surrounded in the packaging bag. The packaging bag comprises a cavity, and the cavity is used to contain the phase change material.

[0006] Preferably, the support member is provided with a groove along the first direction.

[0007] Preferably, there are a plurality of grooves, and the plurality of grooves form a honeycomb structure.

[0008] Preferably, the supporting member comprises a first supporting member, and the first supporting member is arranged at the edge of the packaging bag.

[0009] Preferably, the first support member comprises at least one opening.

[0010] Preferably, the support member includes a second support member, and the second support member is spaced apart from the first support member.

[0011] Preferably, the second supporting member is arranged in the middle of the phase change material bag.

[0012] Preferably, the support member is connected and fixed to the packaging bag.

[0013] Preferably, the packaging bag is an elastic member.

[0014] Preferably, the thickness of the packaging bag in the first direction is ≤3 mm.

[0015] Preferably, the packaging bag is provided with a liquid injection hole, and the liquid injection hole is communicated with the cavity.

[0016] Preferably, the packaging bag is provided with an air port, and the air port is communicated with the cavity.

[0017] Preferably, the packaging bag is provided with a pressure relief structure, and the pressure relief structure is communicated with the cavity.

[0018] Preferably, the pressure relief structure includes a three-way valve adapted to be connected to the phase change material bag, and the pressure relief structure also includes a temperature detection structure, and / or a humidity detection structure, and / or a flow control structure, and / or an air pressure control structure.

[0019] According to a second aspect of the present invention, a heat exchange component is also provided, the heat exchange component comprising the above-mentioned phase change material bag and the phase change material, and the phase change material is located in the phase change material bag.

[0020] According to a third aspect of the present invention, a battery pack is also provided, comprising a battery cell and the above-mentioned phase change material bag, wherein the phase change material bag is in contact with the battery cell.

[0021] According to a fourth aspect of the present invention, there is also provided an electricity consumption system, which includes an electricity consumption body and the above-mentioned battery pack, wherein the electricity consumption body is electrically connected to the battery pack.

[0022] Compared with the prior art, the utility model has the following beneficial effects:

[0023] The first support member is arranged inside the packaging bag, which can provide stable support for the packaging bag, prevent the packaging bag from being deformed or broken when subjected to external force or self-expansion, and can conveniently fix and place the packaging bag, making it more convenient and quick to load and remove the phase change material. At the same time, the cavity of the packaging bag is used to accommodate the phase change material, which can protect the phase change material from the influence of the external environment and maintain its stability and reliability. The design of the support member and the packaging bag enhances the overall structural stability of the phase change material bag, enabling it to better withstand external pressure and load, thereby reducing the risk of deformation and damage. At the same time, the support member can reduce the stress generated by temperature changes and material expansion inside the phase change material bag, thereby reducing the possibility of material fatigue and damage and improving the durability of the phase change material bag.

[0024] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the utility model more obvious and easy to understand, the following preferred embodiments are specifically cited and described in detail with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0026] Figure 1 is a schematic diagram of a phase change material bag according to an embodiment of the utility model;

[0027] Figure 2 is a schematic diagram of a packaging bag according to an embodiment of the utility model;

[0028] Figure 3 is a schematic diagram of a pressure relief structure according to an embodiment of the utility model;

[0029] Figure 4 is a partial schematic diagram of a battery pack according to an embodiment of the utility model;

[0030] Reference numerals:

[0031] 10: Phase change material bag; 11: Battery cell;

[0032] 100: packaging bag; 200: injection hole;

[0033] 300: air port; 400: pressure relief structure;

[0034] 101: support member; 102: cavity;

[0035] 1011: a first support member; 1012: a second support member;

[0036] 1013: opening; 1014: groove;

[0037] 1015: first surface; 1016: second surface;

[0038] 401: temperature detector; 402: flow controller;

[0039] 403: humidity detector; 404: air pressure controller;

[0040] 405: Three-way valve; DETAILED DESCRIPTION

[0041] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the present invention are further described below in conjunction with the accompanying drawings and through specific implementation methods. It is understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for the convenience of description, only the parts related to the present invention are shown in the accompanying drawings, rather than all of them.

[0042] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0044] In the description of this embodiment, the terms "upper", "lower", "right", and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the present utility model.

[0045] The terms "first", "second" and the like in the specification and claims of the present utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0046] In the present application embodiment, Figure 2 As shown, the first direction D1 is the thickness direction of the phase change material bag 10 , the second direction D2 is parallel to the surface where the phase change material bag 10 contacts the battery cell 11 , and the first direction D1 is perpendicular to the second direction D2 .

[0047] The utility model provides a phase change material bag 10, such as Figure 1As shown, the phase change material bag 10 includes a packaging bag 100 and a support member 101, wherein the support member 101 includes a first support member 1011, wherein the first support member 1011 is disposed within the packaging bag 100, and the packaging bag 100 includes a cavity 102, wherein the cavity 102 is used to contain the phase change material. The first support member 1011 is disposed within the packaging bag 100, and can provide stable support for the packaging bag 100, and prevent the packaging bag 100 from being deformed or broken when subjected to external force or when the packaging bag 100 expands itself, and can conveniently fix and place the packaging bag 100, making it more convenient and quick to load and remove the phase change material. Adding the first support member 1011 to the phase change material bag 10 can enhance the overall structural stability of the phase change material bag 10, so that it can better withstand external pressure and load, thereby reducing the risk of deformation and damage. At the same time, the first support member 1011 can reduce the stress generated by temperature changes and material expansion inside the phase change material bag 10, thereby reducing the possibility of material fatigue and damage, and improving the durability of the phase change material bag 10, so that it can better adapt to various environments and application requirements. For example, in some harsh environments, the support member 101 can protect the packaging bag 100 from damage and keep its performance stable.

[0048] like Figure 1 and Figure 2 As shown, the support member 101 is provided with a groove 1014 along the first direction. The design of the groove 1014 enhances the stability of the support member 101, so that it can better withstand external pressure and stress. The shape, size and number of the groove 1014 can be changed as needed to adapt to different phase change material types and system requirements. In a specific embodiment of the present application, a through groove 1014 is provided, and the cross-section of the groove 1014 is hexagonal. This shape can provide a larger contact area, thereby enhancing the strength and stability of the structure. In other embodiments, we can choose a circular, rectangular or other shape of groove 1014. These different shapes can be selected according to specific application requirements to meet specific functional or performance requirements.

[0049] Furthermore, the groove 1014 is provided with a plurality of grooves 1014, and the plurality of grooves 1014 form a honeycomb structure. The honeycomb structure is a regular shape with a plurality of hexagonal edges connected, and has excellent mechanical properties. Due to its symmetry, the hexagonal honeycomb structure can remain stable when subjected to various complex external forces, so it can be used in various occasions requiring stable support, and can meet the expansion force requirements of the battery during the cycle process, thereby providing sufficient support for the phase change material, and the honeycomb structure has higher fatigue resistance and compressive strength. In addition, due to its structural characteristics, it can also save materials, thereby reducing costs.

[0050] In the embodiments disclosed in the present application, a plurality of grooves 1014 form a unique honeycomb structure. This structure is arranged in a straight line with a plurality of hexagonal grooves 1014. This method can further simplify the structure, making it easier to manufacture and install. At the same time, in some other embodiments, a plurality of hexagonal grooves 1014 can also be connected side by side. This connection method not only increases the strength and stability of the structure, but also makes the entire structure more compact and efficient. The arrangement of the grooves 1014 can be flexibly adjusted according to specific application requirements, and the plurality of grooves 1014 can be arranged at different angles or different spacings to adapt to different working conditions and performance requirements.

[0051] In some other embodiments, a mesh support structure composed of a plurality of support members 101 interconnected by rectangular grooves 1014 or circular grooves 1014, an elastic support member 101 made of elastic material, or a multi-layer support member 101 formed by stacking a plurality of support members 101 of different materials or structures, etc. may be used.

[0052] The support member 101 described in the present application includes a first support member 1011, and the first support member 1011 is arranged at the edge of the packaging bag 100. The support member 101 can better fix the phase change material bag 10, and is arranged at the edge of the packaging bag 100 to prevent the packaging bag 100 from moving during use, and can also prevent the packaging bag 100 from being damaged or deformed when subjected to external pressure or impact. In addition, since the first support member 1011 is located at the edge of the packaging bag 100, it can effectively disperse external forces and reduce the impact and pressure on the packaging bag 100. At the same time, the design of the first support member 1011 can also improve the durability of the packaging bag 100, making it more reliable and stable during use. The first support member 1011 can also affect the external edge sealing to ensure the tightness and integrity of the edge sealing.

[0053] In the embodiment disclosed in the present application, the support member 101 is disposed at the edge of the packaging bag 100, and the main heating point of the battery cell 11 is located in the middle of the battery cell 11 body. The support member 101 is located at the edge of the bag, which allows the phase change material to be in easier contact with the heating area of ​​the battery cell 11, can better control the temperature, and more effectively absorb the heat generated by the battery cell 11. The support member 101 is located at the edge of the bag, reducing the occupation of the central space, thereby better utilizing the space in the battery pack. Furthermore, the support member 101 is disposed at the edge, which allows the battery cell 11 and the phase change material bag 10 to be in direct contact and arranged together, which makes the assembly of the battery pack more flexible and can be combined according to different needs and specifications. Because they have a flat surface and a stable structure, they can also reduce friction and vibration inside the battery pack, and improve the stability and durability of the battery pack.

[0054] The first support member 1011 of the present application includes at least one opening 1013. The opening 1013 is provided for injecting phase change material and exhausting. The shape of the opening 1013 is not limited. The position of the opening 1013 is preferably provided on the narrow side of the phase change material bag 10. When the phase change material needs to be added or replaced, the material only needs to be put in or taken out through the opening 1013, without removing the entire bag, thereby improving the convenience of operation. By providing the opening 1013 on the first support member 1011, the packaging bag 100 can be more conveniently connected to the injection hole 200 and the air port 300. In this way, more convenient injection and inflation operations can be achieved, and the overall efficiency can be improved. In addition, the opening 1013 left on the first support member 1011 needs to be connected to the pressure relief structure 400, which plays a role in regulating the internal pressure of the packaging bag 100. Through the pressure relief structure 400, the excess pressure inside the packaging bag 100 can be released in time to avoid excessive pressure from causing damage to the packaging bag 100 and related equipment. This pressure regulating mechanism can maintain the stability of the internal pressure of the packaging bag 100 and improve the overall safety.

[0055] In the embodiment disclosed in the present application, the phase change material bag 10 is paired with the battery cell 11 and has a rectangular shape. The first support member 1011 is arranged around the three edges of the packaging bag 100 and is U-shaped. This design enables the support member 101 to effectively support the packaging bag 100 and prevent the packaging bag 100 from being deformed or broken when subjected to external force or self-expansion. At the same time, leaving one edge as an opening 1013 facilitates the loading and removal of the phase change material and the adjustment of the air pressure. In addition, this design also allows the shape of the phase change material bag 10 to match the shape of the battery cell 11, facilitating the installation and use of the phase change material bag 10. At the same time, the pairing of the phase change material bag 10 and the battery cell 11 can also improve the stability and reliability of the entire battery system.

[0056] Furthermore, the narrow side can be selected as the opening 1013. The narrow side has a smaller area, and the opening 1013 has a smaller impact on the overall structure of the packaging bag 100, and will not significantly reduce its strength and stability. In addition, from the perspective of manufacturing and processing, setting the opening 1013 on the narrow side is also more convenient and efficient.

[0057] The support member 101 of the present application includes a second support member 1012, and the second support member 1012 is spaced apart from the first support member 1011. Figure 2As shown, in the embodiment disclosed in the present application, if the first support member 1011 and the second support member 1012 are arranged continuously, the phase change material injected through the injection hole 200 can only fill half of the space, resulting in the cavity 102 not being fully utilized. The interval setting can avoid such waste and improve the filling effect of the phase change material. The two support members 101 are located at different positions, respectively, and a more stable support structure can be formed. When the packaging bag 100 is subjected to external pressure or impact, the two support members 101 can share the pressure together, reducing the risk of deformation and damage of the packaging bag 100. The design of the interval setting allows the two support members 101 to move and adjust independently. During the manufacturing process of the packaging bag 100, the position and angle of the two support members 101 can be adjusted as needed to adapt to different production environments and application requirements. In addition, when a support member 101 fails or is damaged, the performance of the packaging bag 100 can be restored by simply replacing the damaged support member 101. This design can be easily maintained and replaced, extending the service life of the packaging bag 100.

[0058] In practical applications, the second support member 1012 is generally arranged in the area surrounded by the first support member 1011. Further, the second support member 1012 is arranged in the middle position of the phase change material bag 10 to reduce the deformation degree of the phase change material bag 10. Since the phase change material bag 10 undergoes certain temperature changes during the charging and discharging process, the shape and size of the phase change material bag 10 change, and the deformation degree of the central part is the largest. In order to reduce this degree of deformation, the second support member 1012 is preferably arranged in the middle position of the bag to provide additional support and fixing. By arranging the second support member 1012 in the middle position of the phase change material bag 10, the deformation caused by temperature changes can be effectively reduced, and the stability and durability of the phase change material bag 10 can be improved. At the same time, this design can also improve the energy density of the battery pack, because the shape and size of the phase change material bag 10 are more stable, and can be arranged more closely together to reduce space waste. In some other embodiments, different second support member 1012 structures can be set according to the specific shape of the phase change material bag 10.

[0059] The support member 101 of the present application is connected and fixed to the packaging bag 100. The connection and fixation of the support member 101 and the packaging bag 100 can ensure that the support member 101 will not fall off or shift, and always maintain close contact with the packaging bag 100. Reducing the degree of deformation of the packaging bag 100 can significantly improve the heat conduction rate. The connection and fixation of the support member 101 and the packaging bag 100 can be achieved in a variety of ways.

[0060] In the embodiment disclosed in the present application, the support member 101 and the packaging bag 100 are heat-pressed by heating and pressurizing so that they are closely attached together and form a whole. In other embodiments, depending on the specific materials of the phase change material bag 10 and the support member 101, bonding, sewing or mechanical fixing can also be used.

[0061] In the embodiment disclosed in the present application, the packaging bag 100 is an elastic member. The packaging bag 100 needs to adapt to items of different shapes and sizes. When the packaging bag 100 is deformed due to the change in the state of the phase change material, the elastic packaging bag 100 can provide a certain space to accommodate such changes, thereby avoiding excessive deformation or rupture of the packaging bag 100. This adaptability can also reduce the impact of external pressure and load on the packaging bag 100, improve the stability and safety of the overall structure, and at the same time, the elastic packaging bag 100 can better adapt to the thermal expansion and contraction of the phase change material at different temperatures.

[0062] In the embodiment disclosed in the present application, the thickness of the packaging bag 100 is ≤3 mm. The main function of the packaging bag 100 is to absorb the heat generated by the battery cell 11 during the charging and discharging process, and to store the heat through phase change when the temperature is too high to protect the battery cell 11 from high temperature. The overall thickness of the packaging bag 100 is small, which can better absorb and store heat and improve the thermal management efficiency. In addition, the thinner packaging bag 100 can better adapt to the shape and size of the battery cell 11, making the overall structure more simple and compact. This helps to reduce the complexity of the components and the production cost, while also improving the overall energy density of the battery pack.

[0063] The packaging bag 100 described in the present application is provided with an injection hole 200 for injecting phase change material, and the injection hole 200 is connected to the cavity 102. The provision of the injection hole 200 can conveniently inject the phase change material into the cavity 102 of the packaging bag 100. The injection hole 200 is opened only when the phase change material is injected, and the injection hole 200 is closed in other cases. In the embodiment of the present application, a solid or liquid phase change material is selected. For a liquid phase change material, it can be directly injected into the cavity 102 of the packaging bag 100 through the injection hole 200. Make sure that the amount injected is moderate, not too much or too little; for a solid phase change material, it can be dissolved or diluted into a liquid first, and then injected into the cavity 102 of the packaging bag 100 through the injection hole 200. Alternatively, a smaller solid material may be directly poured into the cavity 102 through the injection hole 200. For a larger solid phase change material, an opening 1013 may be directly provided on one side of the packaging bag 100 to place the solid phase change material therein for packaging.

[0064] In some other embodiments, the position and size of the injection hole 200 can be designed and adjusted according to actual needs to adapt to packaging bags 100 and phase change materials of different shapes and sizes, facilitate operation and reduce injection difficulty. In addition, when the phase change material enters the packaging bag 100 through the injection hole 200, the injection hole 200 can play a certain sealing role, thereby reducing the leakage of the phase change material. This helps to improve the stability and safety of the overall structure.

[0065] The packaging bag 100 described in the present application is provided with an air port 300, and the air port 300 is connected to the cavity 102. In the specific implementation process, the air port 300 is opened only when the phase change material is injected, and the air port 300 is closed in other cases. When the phase change material is injected into the phase change material bag 10, the entry of the phase change material may cause the air pressure in the packaging bag 100 to change. Opening the air port 300 when injecting the phase change material can keep the air pressure in the packaging bag 100 balanced with the external air pressure to avoid deformation or damage caused by changes in air pressure. If there is no air port 300 for balance, the phase change material may not be injected normally. The provision of the air inlet 300 can effectively prevent this from happening, ensuring that the injection process is more stable and controllable. The provision of the air port 300 also optimizes the filling speed. In addition, when the battery pack has thermal runaway, the phase change bag will emit a large amount of gas, and this air port 300 will balance the pressure. In some other embodiments, the design of the gas port 300 can be combined with an automated production process. By controlling the opening and closing of the gas port 300 and the gas flow rate, precise control of the injection process can be achieved to improve production efficiency.

[0066] The packaging bag 100 of the present application is provided with a pressure relief structure 400, and the pressure relief structure 400 is connected to the cavity 102. This design is to solve the problem that a large amount of gas generated during the heat absorption process of the phase change material cannot be discharged in time, thereby avoiding the risk of other battery cells 11 and the entire battery pack being out of control due to gas accumulation.

[0067] In the embodiment disclosed in the present application, the pressure relief structure 400 is composed of a wireless temperature sensor, a flow controller 402 and a three-way valve 405. The wireless temperature sensor and the flow controller 402 take into account the gas discharge rate and the temperature and pressure changes inside the battery pack to ensure that the gas can be discharged smoothly. The three-way valve 405 is convenient to be connected in series with other phase change material bags 10, and can effectively control the direction of the pressure relief pipe. Furthermore, the flow controller 402 and the temperature sensor effectively control the capacity of the phase change material, and the remaining capacity can be used multiple times next time. This design can better control the heat absorption and heat release process of the phase change material, improve energy utilization efficiency and battery pack performance. At the same time, since the remaining capacity can be used multiple times, the frequency of replacing the phase change material bag 10 can be reduced, reducing maintenance costs.

[0068] In some other embodiments, other pressure relief structures 400 may be used. For example, other methods such as mechanical pressure valves and electronic pressure sensors may be used to control the discharge and pressure of the gas. These different pressure relief structures 400 may be selected and optimized according to actual needs to meet the requirements of different application scenarios.

[0069] In the second aspect, this specific implementation case provides a heat exchange component, which includes the above-mentioned phase change material bag 10 and phase change material, and the phase change material bag 10 is filled with phase change material. In the embodiment disclosed in the present application, the phase change material is a phase change material composed of organic materials such as paraffin, caprylic acid, and polyethylene glycol. When the external temperature is low, the phase change material releases heat and stores cold. When the battery pack is overheated and the external temperature is high, the phase change material state is transformed to release cold, achieving refrigeration and reducing the risk of heat diffusion. The material will change in density before and after the phase change, which will cause a change in volume. Multiple heat cycles may cause the material to deform, which will affect the thermal conductivity. Preferably, the phase change material is selected to be liquid. The liquid phase change material can evenly absorb the heat generated by the battery cell 11, thereby avoiding the problem of local overheating of the battery cell 11. At the same time, the liquid phase change material can absorb or release a large amount of heat during the phase change process. In addition, the phase change temperature of the liquid phase change material is usually relatively narrow, and its temperature can be precisely controlled, so the precise control of the temperature of the battery cell 11 can be achieved.

[0070] On the third aspect, this specific implementation case also provides a battery pack, comprising a shell, a battery cell 11 and the above-mentioned phase change material bag 10, wherein the phase change material bag 10 is arranged in the shell and in contact with the battery cell 11, and can adapt to battery cells 11 of different shapes and sizes. This flexibility enables the phase change material bag 10 to be widely used in different types of battery packs and has broad application prospects. Preferably, during the manufacturing process of the battery pack, the phase change material bag 10 is placed between the battery cells 11, and then fixed and connected. The installation method is simple and easy, which can greatly shorten the manufacturing time and improve production efficiency.

[0071] In a specific implementation case, the design and material selection of the phase change material bag 10 need to be carefully considered. The shape and size of the phase change material bag 10 should match the space between the battery cells 11 to ensure that it can fit tightly around the battery cells 11. At the same time, the material of the phase change material bag 10 should have a high thermal conductivity and phase change temperature to ensure that it can quickly absorb and release heat at a suitable temperature. In addition, the material of the phase change material bag 10 should also have high chemical stability and weather resistance to adapt to different working environments and temperature conditions.

[0072] On the fourth aspect, this specific implementation case also provides an electricity system, including an electricity-consuming subject and the above-mentioned battery pack, and the electricity-consuming subject is electrically connected to the battery pack. In a specific embodiment, the electricity-consuming system can be any device or system that requires electric drive, such as electric vehicles, electric bicycles, electric tools, etc. The electricity-consuming subject of the electricity system is electrically connected to the battery pack, and the operation of the electricity-consuming subject is driven by the electric energy provided by the battery pack. In a specific implementation, the battery pack and the electricity-consuming subject can be electrically connected through cables, plugs, and other connection methods. At the same time, the heat-absorbing and heat-insulating component can be integrated with the battery pack and the electricity-consuming subject to achieve better heat dissipation and heat insulation effects.

[0073] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A phase change material bag, characterized in that: The phase change material bag comprises a packaging bag and a support member, wherein the support member comprises a first support member, and the first support member is disposed in the packaging bag. The packaging bag comprises a cavity, and the cavity is used to contain the phase change material.

2. The phase change material bag according to claim 1, characterized in that: The support member is provided with a groove along the first direction.

3. The phase change material bag according to claim 2, characterized in that: There are a plurality of grooves, and the plurality of grooves form a honeycomb structure.

4. The phase change material bag according to claim 1, characterized in that: The first supporting member is arranged at the edge of the packaging bag.

5. The phase change material bag according to claim 4, characterized in that: The first support member includes at least one opening.

6. The phase change material bag according to claim 1, characterized in that: The support member includes a second support member, and the second support member is spaced apart from the first support member.

7. The phase change material bag according to claim 6, characterized in that: The second supporting member is arranged in the middle of the phase change material bag.

8. The phase change material bag according to claim 1, characterized in that: The supporting member is connected and fixed to the packaging bag.

9. The phase change material bag according to claim 1, characterized in that: The packaging bag is an elastic member.

10. The phase change material bag according to claim 1, characterized in that: The thickness of the packaging bag in the first direction is ≤3 mm.

11. The phase change material bag according to claim 1, characterized in that: The packaging bag is provided with a liquid injection hole, and the liquid injection hole is communicated with the cavity.

12. The phase change material bag according to claim 1, characterized in that: The packaging bag is provided with an air port, and the air port is communicated with the cavity.

13. The phase change material bag according to claim 1, characterized in that: The packaging bag is provided with a pressure relief structure, and the pressure relief structure is communicated with the cavity.

14. The phase change material bag according to claim 1, characterized in that: The packaging bag is provided with a pressure relief structure, which includes a three-way valve adapted to be connected to the phase change material bag. The pressure relief structure also includes a temperature detection structure, and / or a humidity detection structure, and / or a flow control structure, and / or an air pressure control structure.

15. A heat exchange component, characterized in that: The heat exchange component comprises the phase change material bag of claim 1 and a phase change material, wherein the phase change material is located in the phase change material bag.

16. A battery pack, characterized in that: The battery pack comprises a battery cell and the heat exchange assembly according to claim 15, and the heat exchange assembly is in contact with the battery cell.

17. An electricity system, characterized in that: The power consumption system comprises a power consumption entity and the battery pack according to claim 16, and the power consumption entity is electrically connected to the battery pack.

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