Heat dissipation device, single battery, battery pack and electric equipment

Abstract

This application provides a heat dissipation device, a single battery cell, a battery pack, and electrical equipment, solving the problem that conventional heat dissipation schemes used for heat-dissipating bodies in the prior art cannot simultaneously achieve low energy consumption and efficient heat dissipation. The heat dissipation device includes a mounting housing, a phase change material layer, and a liquid cooling assembly. The mounting housing has an insulated phase change space, a liquid cooling space, and an installation space for mounting the heat-dissipating body. The phase change space is located between the liquid cooling space and the installation space, and the liquid cooling space is configured to communicate with external liquid cooling equipment. The phase change material layer is located within the phase change space, and the liquid cooling assembly is located within the liquid cooling space. By placing the phase change space between the installation space and the liquid cooling space, and by placing the phase change material layer within the phase change space, this application forms a composite heat dissipation path combining phase change and liquid cooling, reducing dependence on the flow rate and pumping power of the liquid cooling medium, and achieving adaptive and efficient heat dissipation over a wide temperature range.

Description

Technical Field

[0001] This application relates to the field of battery heat dissipation technology, specifically to a heat dissipation device, a single battery cell, a battery pack, and an electrical device. Background Technology

[0002] In power battery packs and similar high-power electrical devices, the terminals, as core conductive components connecting the internal cells to the external circuitry, bear the responsibility of transmitting large currents. Due to the Joule heating effect, the terminals generate significant heat when current flows through them, and their heat dissipation efficiency directly affects the thermal safety and service life of the battery pack. Therefore, designing efficient, compact, and reliable heat dissipation solutions for the terminal components is a key focus of ongoing research in this field.

[0003] In related technologies, heat dissipation for heat dissipation poles typically relies on a single heat dissipation mechanism. For example, liquid cooling solutions often face the challenge of high system energy consumption, while phase change solutions have limitations such as a limited effective temperature range and insufficient continuous heat dissipation capacity. These single mechanisms are difficult to simultaneously meet the requirements of low energy consumption and efficient heat dissipation when dealing with complex operating conditions with wide temperature ranges and variable heat loads. Summary of the Invention

[0004] In view of this, the embodiments of this application aim to provide a heat dissipation device, a single battery cell, a battery pack, and an electrical device to improve the problem that conventional heat dissipation schemes used for heat dissipation bodies in the prior art are difficult to simultaneously achieve low energy consumption and efficient heat dissipation.

[0005] In a first aspect, embodiments of this application provide a heat dissipation device, comprising: The mounting housing has an insulated phase change space, a liquid cooling space, and an installation space for mounting the heat sink. The phase change space is located between the liquid cooling space and the installation space, and the liquid cooling space is configured to communicate with an external liquid cooling device. A phase change material layer is disposed within the phase change space; A liquid cooling assembly is disposed within the liquid cooling space.

[0006] Optionally, the heat dissipation device includes a first isolation film and a second isolation film disposed within the mounting housing, wherein the first isolation film and the second isolation film are spaced apart to divide the internal space of the mounting housing into the mounting space, the phase change space and the liquid cooling space; The space enclosed by the first isolation membrane is the installation space; the space between the first isolation membrane and the second isolation membrane is the phase change space; and the space between the second isolation membrane and the inner wall of the mounting housing is the liquid cooling space.

[0007] Optionally, the phase change material layer includes a first phase change layer disposed between the first isolation membrane and the second isolation membrane.

[0008] Optionally, the heat dissipation device further includes a third isolation membrane, which is disposed between the first isolation membrane and the second isolation membrane. The first isolation membrane and the third isolation membrane define a first phase changer space, and the third isolation membrane and the second isolation membrane define a second phase changer space. The phase change material layer further includes a second phase change layer 124, wherein the first phase change layer is disposed within the first phase change subspace, and the second phase change layer 124 is disposed within the second phase change subspace.

[0009] Optionally, the phase transition temperature of the first phase transition layer is lower than the phase transition temperature of the second phase transition layer 124.

[0010] Optionally, the liquid cooling assembly includes multiple liquid-passing plates, all of which are arranged around the phase change space and are spaced apart along the depth direction of the liquid cooling space. Each liquid-passing plate has multiple spaced liquid-passing holes; and / or, The heat dissipation device also includes a heat insulation sleeve, which is fitted onto the outer surface of the mounting housing.

[0011] Optionally, the mounting housing has an inlet and an outlet communicating with the liquid cooling space, with the inlet located above the outlet along the depth direction of the liquid cooling space.

[0012] Secondly, embodiments of this application provide a single-cell battery, including terminals and a heat dissipation device as described in the first aspect, wherein the terminals are located in the mounting space.

[0013] Thirdly, embodiments of this application provide a battery pack including at least one single cell as described in the second aspect.

[0014] Fourthly, embodiments of this application provide an electrical appliance, including: Electricity-consuming entities; The battery pack as described in the third aspect is electrically connected to the power-consuming body.

[0015] The beneficial effects of the embodiments of this application are as follows: This application provides a heat dissipation device that forms a composite heat dissipation path combining phase change and liquid cooling by placing a phase change space between an installation space and a liquid cooling space and connecting them thermally, and by placing a phase change material layer within the phase change space. Specifically, by utilizing the characteristic of phase change materials to absorb a large amount of latent heat during phase change while maintaining a relatively constant temperature, heat from the heat-dissipating body is actively absorbed and buffered, reducing the peak heat flow and average temperature level instantaneously transferred to the liquid cooling space. The heat-dissipating body can be an electrode. Therefore, external equipment providing the liquid cooling medium to the liquid cooling space does not need to operate under high load to cope with temperature fluctuations of the heat source, reducing dependence on the liquid cooling medium flow rate and pumping power, and achieving adaptive and efficient heat dissipation over a wide temperature range. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of an electrical device provided for some embodiments of this application.

[0017] Figure 2 for Figure 1 A cross-sectional view of the battery pack of the electrical equipment shown.

[0018] Figure 3 This is a schematic diagram of the heat dissipation device provided in an embodiment of this application.

[0019] Figure 4 for Figure 3 A cross-sectional view.

[0020] Explanation of reference numerals in the attached figures: 100. Electrical equipment; 110. Main power supply unit; 110a. Battery compartment; 120. Battery pack; 121. Housing; 121a. First inner cavity; 122. Single cell; 1. Heat dissipation device; 11. Mounting housing; 111. Mounting space; 112. Phase change space; 1121. First phase change subspace; 1122. Second phase change subspace; 113. Liquid cooling space; 114. Liquid inlet; 115. Liquid outlet; 12. Phase change material layer; 123. First phase change layer; 124. Second phase change layer; 13. Liquid cooling assembly; 131. Liquid flow plate; 1311. Liquid flow hole; 14. First isolation membrane; 15. Second isolation membrane; 16. Third isolation membrane; 17. Buffer pad; 18. Heat insulation sleeve; 2. Pole column; 21. Stepped surface; Z, Depth direction. Detailed Implementation

[0021] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] For ease of description, all heat sinks mentioned thereafter refer to the pole, i.e., the embodiments are written with the pole as the heat sink. In addition, the direction closer to the central axis of the pole is defined as "inner side" or "inner", and the direction farther from the central axis of the pole is defined as "outer side" or "outer"; the axial direction of the pole is defined as "depth direction", its mounting end is "proximal end", and the opposite end is "far end".

[0023] Please see Figure 1 , Figure 1 This is a schematic diagram of an electrical device 100 provided in some embodiments of this application. Figure 1 In the illustrated embodiment, an electric vehicle is used as an example of the electrical device 100 for illustrative purposes, and this should not be construed as a specific limitation of this application. In other embodiments, the electrical device may also be a mobile phone, a laptop computer, a mobile charging station, or other similar devices.

[0024] Please continue reading. Figure 1 The electrical device 100 includes a power-consuming body 110 and a battery pack 120. The battery pack 120 is fixed to the power-consuming body 110 and electrically connected to the power-consuming components of the power-consuming body 110 to supply power to the power-consuming components of the power-consuming body 110. Specifically, the power-consuming body 110 may have a battery compartment 110a, and the battery pack 120 is fixed inside the battery compartment 110a.

[0025] Please see Figure 2 , Figure 2 for Figure 1 The diagram shows a cross-sectional view of the battery pack 120 of the electrical device 100. The battery pack 120 may include a housing 121 and at least one row of individual battery cells 122. The housing 121 encloses a first inner cavity 121a. The individual battery cells 122 are disposed in the first inner cavity 121a of the housing 121 and fixed relative to the housing 121. The housing 121 protects the individual battery cells 122 from external forces causing vibration and impact that could damage them. The housing 121 may be a metal structure or a plastic structure.

[0026] A single cell (122) is the most basic electrochemical unit, capable of storing and releasing electrical energy. Single cells (122) can be lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-metal hydride batteries, nickel-cadmium batteries, lead-acid batteries, etc.

[0027] Figure 2 In the battery pack 120 shown, there are multiple individual battery cells 122. These individual battery cells 122 can be electrically connected in series, in parallel, or in a mixed configuration. A mixed configuration means that the individual battery cells 122 are connected in both series and parallel relationships, which can be specifically designed according to the power requirements of the electrical device 100. In some other embodiments, the battery pack 120 may contain only one individual battery cell 122.

[0028] A single battery cell includes a casing, electrode assembly, and cover assembly. The casing has a receiving cavity and a first opening communicating with the receiving cavity. The receiving cavity is used to receive the electrode assembly and electrolyte. The first opening is used to place the electrode assembly within the receiving cavity, and the cover assembly is used to close the first opening.

[0029] The casing can be generally rectangular in shape, so that the individual battery 122 is also generally rectangular. The casing can be a metal casing. In some examples, the casing can be an aluminum alloy casing, so that the casing has a lighter weight, which is beneficial to the lightweight of the individual battery 122, and thus to the overall lightweight of the electrical device 100. In other examples, the casing can also be a stainless steel casing, a titanium alloy casing, etc., so that the casing has higher strength, which in turn gives the individual battery 122 better strength and stronger resistance to puncture and vibration damage. In other embodiments, the casing can also be cylindrical, irregularly shaped, etc.

[0030] The electrode assembly is disposed within a receiving cavity and immersed in an electrolyte. The electrode assembly includes a positive electrode (not shown), a negative electrode (not shown), and a separator (not shown). The positive electrode can be formed from a positive current collector and a positive active material coated on the current collector. In some examples, the positive current collector can be aluminum foil, and the positive active material can be lithium cobalt oxide (LCO), ternary materials (NCM / NCA), lithium iron phosphate (LFP), etc. Based on this, the electrode assembly also includes a positive electrode tab (not shown), which is connected to the positive electrode and electrically conductive. Specifically, the positive electrode tab can be fixed to the positive current collector by welding or integrally formed with the positive current collector.

[0031] The negative electrode sheet can be formed from a negative current collector and a negative active material coated on the negative current collector. In some examples, the negative current collector can be copper foil, and the negative active material can be graphite, silicon-carbon composite material, etc. Based on this, the electrode assembly also includes a negative electrode tab (not shown in the figure), which is connected to the negative electrode sheet and is electrically conductive. The negative electrode tab and the positive electrode tab are used to electrically connect the electrode assembly to the circuit. Specifically, the negative electrode tab can be fixed to the negative current collector by welding, or it can be integrally formed with the negative current collector.

[0032] A separator is placed between the positive and negative electrode plates to isolate them and prevent short circuits. The separator can be made of porous polyethylene (PE) or polypropylene (PP), etc.

[0033] The cover plate assembly includes a plate and terminals, i.e., the heat sinks. The heat sink is mounted on the plate and electrically connected to the electrode assembly, and a portion of the terminal protrudes from the plate to facilitate electrical connection between the terminal and external devices. The heat dissipation device is mounted on the terminal and is mainly used to dissipate heat from the terminal.

[0034] To address the issue that the conventional heat dissipation solution used in the current technology's pole post 2 cannot simultaneously achieve low power consumption and efficient heat dissipation, please refer to [link to relevant documentation]. Figure 3 and Figure 4 In this embodiment, the heat dissipation device 1 is mainly used for efficient thermal management of the terminals 2 in single-cell batteries, power equipment, etc., and is especially suitable for scenarios where significant Joule heating is generated due to the passage of large currents. The heat dissipation device 1 aims to integrate and thermally couple passive phase change heat absorption and active liquid cooling mechanisms in space through a composite heat dissipation structure, thereby achieving a balance between heat dissipation efficiency and operating energy consumption under wide temperature range and variable heat load conditions.

[0035] The heat dissipation device 1 includes a mounting housing 11. The mounting housing 11 is typically made of a material with sufficient structural strength, corrosion resistance, and good thermal conductivity, such as aluminum alloy, copper alloy, or thermally conductive engineering plastic. The mounting housing 11 can be cylindrical, square, or other annular structures adapted to the shape of the electrode post 2. Internally, it includes a mounting space 111 for mounting the electrode post 2, a phase change space 112, and a liquid cooling space 113. These three spaces are physically insulated from each other to prevent electrical short circuits or liquid cooling medium leakage and contamination, and are thermally connected to each other. The phase change space 112 is located between the liquid cooling space 113 and the mounting space 111. In other words, from the perspective of heat transfer path, the sequence from the inside out is: mounting space 111, phase change space 112, and liquid cooling space 113. The installation space 111 is used to accommodate and directly contact the electrode column 2 to be cooled; the phase change space 112 is filled with a phase change material layer 12, which absorbs and buffers heat through its latent heat of phase change; the liquid cooling space 113 is configured to communicate with external liquid cooling equipment for the flow of liquid cooling medium to remove the final heat. A liquid cooling component 13 can also be installed in the liquid cooling space 113 to guide and optimize the flow of the liquid cooling medium and enhance heat exchange.

[0036] In some embodiments, the physical isolation of the three spaces—installation space 111, phase change space 112, and liquid cooling space 113—is achieved by two layers of isolation membranes disposed inside the installation housing 11. The heat dissipation device 1 includes a first isolation membrane 14 and a second isolation membrane 15, both disposed within the installation housing 11 and spaced apart along the radial direction of the pole post 2. Both the first isolation membrane 14 and the second isolation membrane 15 are flexible thin-film materials with good electrical insulation, thermal conductivity, and chemical stability, such as polyimide films and ceramic-coated composite films. They are attached to a pre-set support structure inside the installation housing 11 by means of bonding, hot pressing, or mechanical fixing, thereby clearly dividing the internal space of the installation housing 11 into three coaxial and mutually sealed regions.

[0037] Specifically, the internal space enclosed by the first isolation membrane 14 constitutes the installation space 111, which is used to directly receive and install the electrode post 2. The annular interlayer space formed between the first isolation membrane 14 and the second isolation membrane 15 constitutes the phase change space 112. The space formed between the second isolation membrane 15 and the inner wall of the mounting housing 11 is the liquid cooling space 113. The heat generated by the electrode post 2 is first conducted to the first isolation membrane 14, then passes through the first isolation membrane 14 into the phase change space 112, where it is absorbed by the phase change material. The heat that is not completely buffered continues to be transferred to the second isolation membrane 15, and then through the second isolation membrane 15 to the liquid cooling medium in the liquid cooling space 113. The first isolation membrane 14 and the second isolation membrane 15 not only serve as spatial isolation, but their own insulation properties also effectively prevent the risk of electrochemical corrosion between the electrode post 2 and the liquid cooling medium or the outer housing.

[0038] In some embodiments, a phase change material layer 12 is disposed within the phase change space 112. The phase change material layer 12 includes at least a first phase change layer 123. The first phase change layer 123 fills the phase change space 112 between the first separator 14 and the second separator 15. The first phase change layer 123 may be composed of a phase change material with a specific phase change temperature, such as paraffin, fatty acid, or hydrated salt, and its selection depends on the operating temperature rise range of the target electrode 2. For example, when the temperature of the electrode 2 rises to the phase change temperature of the first phase change layer 123, the material undergoes a solid-liquid phase change, absorbing a large amount of latent heat, thereby effectively suppressing the rapid rise in the temperature of the electrode 2 and playing a "thermal buffer" role.

[0039] In some embodiments, the heat dissipation device 1 further includes a third isolation membrane 16. The third isolation membrane 16 is disposed between the first isolation membrane 14 and the second isolation membrane 15, and is parallel and spaced apart from both. Thus, a first phase changer space 1121 is defined between the first isolation membrane 14 and the third isolation membrane 16, and a second phase changer space 1122 is defined between the third isolation membrane 16 and the second isolation membrane 15.

[0040] Accordingly, the phase change material layer 12 includes, in addition to the first phase change layer 123 disposed within the first phase change subspace 1121, a second phase change layer 124 disposed within the second phase change subspace 1122. The first phase change layer 123 and the second phase change layer 124 are made of two phase change materials with different phase change temperatures. In a preferred embodiment, the phase change temperature of the first phase change layer 123 is lower than that of the second phase change layer 124. The first phase change layer 123 can be a paraffin-based composite material with a phase change temperature between 40°C and 60°C, while the second phase change layer 124 can be a stearic acid composite phase change material with a phase change temperature between 60°C and 80°C, or an alloy phase change material with a higher melting point.

[0041] Specifically, when the electrode 2 begins to heat up and the temperature gradually rises, the first phase change layer 123, located on the inner side and with a lower phase change temperature, is activated first. It absorbs a large amount of heat through phase change, slowing down the rate of temperature rise. If the heat load continues or increases, and the temperature continues to climb and exceeds the phase change point of the first phase change layer 123, the heat will be transferred through the third isolation membrane 16 to the second phase change layer 124. At this time, the second phase change layer 124, with a higher phase change temperature, begins to absorb heat, further absorbing heat through its latent heat of phase change, preventing a sudden drop in heat dissipation capacity at high temperatures. This design, with multilayer phase change materials having progressively increasing phase change temperatures along the heat transfer path, achieves graded and sequential heat absorption, significantly widening the effective operating temperature range of the entire heat dissipation device. This allows it to easily cope with different heat load conditions, from mild to severe, improving heat dissipation stability and adaptability. The third isolation membrane 16 itself also provides additional insulation and helps maintain the morphological stability of the two phase change subspaces.

[0042] In some embodiments, the liquid cooling assembly 13 within the liquid cooling space 113 includes a plurality of liquid-passing plates 131. The plurality of liquid-passing plates 131 are arranged around the phase change space 112, specifically within the liquid cooling space 113, and together with the inner wall of the mounting housing 11 and the second isolation membrane 15, define the flow path of the liquid cooling medium. These liquid-passing plates 131 are spaced apart along the depth direction Z (i.e., the height direction of the pole post 2) of the liquid cooling space 113. Each liquid-passing plate 131 has a plurality of spaced-apart liquid-passing holes 1311. When the liquid cooling medium enters the liquid cooling space 113, due to the obstruction and guidance of the liquid-passing plates 131, it cannot pass directly through, but must pass through the liquid-passing holes 1311 on each liquid-passing plate 131 and flow through the chambers between the plates. Specifically, firstly, the liquid-cooling plate 131 divides the large liquid-cooling space 113 into multiple continuous, smaller flow channel units, increasing the path length of the liquid-cooling medium flow and the contact time with the heat dissipation surface; secondly, when the liquid-cooling medium flows through the relatively small liquid-cooling holes 1311, the flow velocity increases, and the flow field is disturbed and redistributed when it enters the next chamber; furthermore, when the liquid-cooling medium impacts the surface of the liquid-cooling plate 131 and is ejected from the liquid-cooling holes 1311, it helps to break the thermal boundary layer formed on the outer surface of the second isolation membrane 15 or the inner wall of the mounting housing 11.

[0043] It should be noted that the shape of the liquid passage 1311 can be circular, rhomboid, rectangular, strip-shaped slit, or other shapes that can achieve the functions of turbulence and flow guidance. Furthermore, the plurality of liquid passages 1311 on each liquid passage plate 131 can be arranged in a ring array around the second isolation membrane 15, or they can be randomly arranged around the second isolation membrane 15.

[0044] Furthermore, the mounting housing 11 is provided with an inlet 114 and an outlet 115 communicating with the liquid cooling space 113. To optimize the cooling cycle and utilize gravity-assisted exhaust and natural convection, the inlet 114 is positioned above the outlet 115 along the depth direction Z of the liquid cooling space 113. The liquid cooling medium enters from the higher inlet 114, flows through the liquid cooling space 113, and exits from the lower outlet 115. This facilitates the smoother filling of the entire flow channel by the liquid cooling medium under gravity, reduces the possibility of internal gas accumulation, and provides a certain degree of gravity-driven assistance in addition to pumping force, which is of positive significance for improving cycle reliability and heat dissipation uniformity.

[0045] In some embodiments, the heat dissipation device 1 may include a buffer pad 17 disposed between the stepped surface of the pole post 2 and the mounting housing 11. The buffer pad 17 is made of an elastic material such as silicone rubber, fluororubber, or other heat-resistant elastomers. The pole post 2 and the mounting housing 11 are fixed by a threaded connection. Specifically, the mounting housing 11 has an external hexagonal thread, and the outer surface of the pole post 2 is threaded to the external hexagonal thread. When the pole post 2 and the mounting housing 11 are fed towards each other through the threads, the buffer pad 17 can play a buffering role, preventing the bottom of the mounting housing 11 and the threaded section on the pole post 2 from being crushed.

[0046] In addition, the heat dissipation device 1 may also include a heat insulation sleeve 18. The heat insulation sleeve 18 is fitted onto the outer surface of the mounting housing 11. The heat insulation sleeve 18 is typically made of a material with low thermal conductivity, such as silicone rubber-based composite insulation material, aerogel felt, or foamed polymer. The main function of the heat insulation sleeve 18 is to reduce heat loss from the heat dissipation device to the surrounding environment, so that the heat generated by the pole 2 can be more concentratedly collected and discharged effectively through the designed path (i.e., guided to the liquid cooling space 113 via the phase change space 112), thereby improving the thermal efficiency of the heat dissipation path. At the same time, the heat insulation sleeve 18 also provides a certain degree of physical protection and electrical insulation for the mounting housing 11 and the external liquid cooling pipelines.

[0047] During actual assembly, the pole piece 2 can be pre-coated with thermally conductive insulating grease or fitted with a thermally conductive pad before being inserted into the installation space 111 to ensure good thermal contact. For embodiments using threaded connections, the top of the mounting housing 11 can be provided with an internal thread or an external hexagonal thread structure that mates with the threaded section on the pole piece 2, achieving a tight installation by screwing. At the installation interface, such as between the bottom of the mounting housing 11 and the stepped surface of the pole piece 2, elastic elements such as silicone pads can be placed. These elements are moderately compressed during the tightening process to balance the contact pressure, prevent stress concentration that could lead to component crushing, and compensate for tolerances, ensuring reliable thermal interface contact.

[0048] The heat dissipation device 1 based on any of the above embodiments has the following thermal management method flow: First, the electrode 2 is installed in the installation space 111 of the heat dissipation device, ensuring good thermal contact between it and the inner interface of the device. Second, the liquid inlet 114 and liquid outlet 115 of the liquid cooling space 113 are connected to the external liquid cooling medium circulation system. When the electrode 2 generates heat due to power-on operation, the heat is first conducted to the phase change material layer 12 in the phase change space 112; the phase change material absorbs the heat and undergoes a phase change, using the latent heat effect to buffer the temperature rise rate of the electrode 2. Subsequently, the residual heat that is not completely absorbed by the phase change material continues to be conducted outward to the liquid cooling space 113; at this time, the liquid cooling medium pumped in by the external circulation system flows through the liquid cooling space 113, and through convective heat exchange with the liquid cooling component 13 and the space wall, the heat is continuously carried away, maintaining the ability of the phase change material to be reused within a certain working cycle, thereby realizing the synergy of passive heat absorption buffering and active cooling heat dissipation.

[0049] It is understood that the aforementioned phase change material layer 12 is not limited to two layers. Depending on actual temperature control requirements, three or more layers of phase change material with different phase change temperatures can be set, with each layer separated by a corresponding isolation membrane. The material and thickness of the isolation membrane can be selected and optimized according to insulation strength, thermal conductivity requirements, and mechanical properties. The number, spacing, and arrangement of the liquid flow plates 131 and the liquid flow holes 1311 can be adjusted according to the required flow resistance and heat transfer intensity. The specific form of the buffer pad 17 can be adapted to the installation interface. The heat insulation sleeve 18 can cover the entire mounting housing 11 or partially cover it.

[0050] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications or equivalent substitutions made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A heat dissipating device, characterized by, include: The mounting housing has an insulated and thermally connected phase change space, a liquid cooling space, and an installation space for mounting the heat sink. The phase change space is located between the liquid cooling space and the installation space, and the liquid cooling space is used for the flow of liquid cooling medium. A phase change material layer is disposed within the phase change space.

2. The heat dissipating device according to claim 1, wherein The heat dissipation device includes a first isolation membrane and a second isolation membrane disposed inside the mounting housing. The first isolation membrane and the second isolation membrane are spaced apart so that the internal space of the mounting housing is divided into the mounting space, the phase change space and the liquid cooling space. The space enclosed by the first isolation membrane is the installation space; the phase change space is formed between the first isolation membrane and the second isolation membrane, and the liquid cooling space is formed between the second isolation membrane and the inner wall of the installation housing.

3. The heat dissipating device according to claim 2, wherein The phase change material layer includes a first phase change layer, which is disposed between the first isolation membrane and the second isolation membrane.

4. The heat dissipating device according to claim 3, wherein The heat dissipation device further includes a third isolation membrane, which is disposed between the first isolation membrane and the second isolation membrane. The first isolation membrane and the third isolation membrane define a first phase changer space, and the third isolation membrane and the second isolation membrane define a second phase changer space. The phase change material layer further includes a second phase change layer, wherein the first phase change layer is disposed within the first phase change subspace, and the second phase change layer is disposed within the second phase change subspace.

5. The heat dissipating device of claim 4, wherein The phase transition temperature of the first phase transition layer is lower than that of the second phase transition layer.

6. The heat dissipating device according to any one of claims 1 to 5, wherein The liquid-cooled space is provided with multiple liquid-passing plates, which are arranged around the phase change space and spaced apart along the depth direction of the liquid-cooled space. Each liquid-passing plate has multiple spaced liquid-passing holes; and / or, The heat dissipation device also includes a heat insulation sleeve, which is fitted onto the outer surface of the mounting housing.

7. The heat dissipation device according to claim 6, characterized in that, The mounting housing has an inlet and an outlet that communicate with the liquid cooling space. Along the depth direction of the liquid cooling space, the inlet is located above the outlet.

8. A single-cell battery, characterized in that, It includes a pole and a heat dissipation device as described in any one of claims 1 to 7, wherein the pole is located in the mounting space.

9. A battery pack, characterized in that, include: At least one single cell as described in claim 8.

10. An electrical appliance, characterized in that, include: Electricity-consuming entities; The battery pack as described in claim 9 is electrically connected to the power-consuming body.

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