WO2022205790A1 - Heat dissipation device, battery pack, and electrical device - Google Patents

Heat dissipation device, battery pack, and electrical device Download PDF

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Publication number
WO2022205790A1
WO2022205790A1 PCT/CN2021/118322 CN2021118322W WO2022205790A1 WO 2022205790 A1 WO2022205790 A1 WO 2022205790A1 CN 2021118322 W CN2021118322 W CN 2021118322W WO 2022205790 A1 WO2022205790 A1 WO 2022205790A1
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WO
WIPO (PCT)
Prior art keywords
phase change
change material
casing
heat
radiator
Prior art date
Application number
PCT/CN2021/118322
Other languages
French (fr)
Chinese (zh)
Inventor
徐卫潘
李廷永
李义
Original Assignee
东莞新能安科技有限公司
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Publication date
Application filed by 东莞新能安科技有限公司 filed Critical 东莞新能安科技有限公司
Publication of WO2022205790A1 publication Critical patent/WO2022205790A1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6551—Surfaces specially adapted for heat dissipation or radiation, e.g. fins or coatings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6569—Fluids undergoing a liquid-gas phase change or transition, e.g. evaporation or condensation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

Definitions

  • the present application and the technical field of battery pack devices relate to a radiator, a battery pack and electrical equipment.
  • the battery pack is usually provided with a battery pack control assembly battery management system board (BMS board) and a radiator, wherein the radiator is usually set on the BMS board, and the natural convection heat dissipation principle of the radiator is usually used to dissipate heat on the BMS board.
  • BMS board battery pack control assembly battery management system board
  • Natural convection heat dissipation refers to the convective heat transfer phenomenon caused by the uneven temperature of each part of the fluid participating in the heat exchange, resulting in a density difference.
  • the radiator that uses the principle of natural convection heat dissipation is often ineffective in cooling the BMS board.
  • the inventor of the present application found that during the fast charging and high-rate discharging process of the battery pack of the two-wheeled electric vehicle, the temperature rise of the heating components on the BMS board of the battery pack control component is relatively high, and the BMS board is usually located in a closed environment inside the battery pack. , the gas flow speed is very small, and conventional radiators often cannot achieve good heat dissipation effect.
  • the present application provides a radiator, a battery pack and an electrical device to improve the problem of poor heat dissipation effect of the radiator.
  • a heat sink comprising: a casing provided with a closed hollow cavity; a phase change material disposed in the hollow cavity, and when the phase change material does not undergo a phase change, The phase change material does not exceed 95% of the volume of the hollow cavity.
  • the phase change material does not exceed 90%-95% of the volume of the hollow cavity.
  • the phase change temperature of the phase change material is 60 degrees Celsius to 180 degrees Celsius, and the phase change material undergoes a phase change to absorb the heat generated by the heating element and reduce the temperature of the heating element.
  • the phase change temperature of the phase change material is 90 degrees Celsius to 180 degrees Celsius, and the phase change material undergoes a phase change to absorb the heat generated by the heating element or the heat of the environment where it is located.
  • the phase change temperature of the phase change material is 90 degrees Celsius to 150 degrees Celsius, and the phase change material undergoes a phase change to absorb the heat generated by the heating element.
  • the phase change temperature of the phase change material is 130 degrees Celsius to 150 degrees Celsius, and the phase change material undergoes a phase change to absorb the heat generated by the heating element or the heat of the environment where it is located.
  • the phase-change enthalpy value of the phase-change material is greater than 60 J/g, which means that each gram of the phase-change material can absorb more than 60 joules of energy when a phase change occurs.
  • phase change enthalpy value of the phase change material ranges from 80J/g to 250J/g, which means that each gram of the phase change material can absorb 80 to 250 joules of energy during phase change. energy.
  • phase change enthalpy of the phase change material ranges from 150J/g to 250J/g, which means that each gram of the phase change material can absorb 150 to 250 joules of Energy, each gram of phase change material absorbs more energy at this time.
  • the inner surface of the housing has a first tooth piece extending toward the hollow cavity, and the first tooth piece can increase the contact area with the phase change material, that is, the phase change material and the The contact area of the shell is increased, which improves the heat absorption efficiency of the phase change material during phase change.
  • the outer surface of the casing is provided with a boss; the heat-conducting plate is provided with a concave portion, the boss is inserted into the concave portion, and the boss is used to increase and be
  • the contact area of the heat-dissipating component improves the heat dissipation of the heat sink to the heat-dissipating component.
  • the casing includes a first casing, a second casing and a third casing; the second casing is provided at the first end of the first casing, and the The third casing is disposed at the second end of the first casing, and a closed hollow cavity is formed by the first casing, the second casing and the third casing.
  • the heat sink includes an encapsulation film, the encapsulation film covers the phase change material, and the encapsulation film restricts the flow of the phase change material.
  • a battery pack including: a battery cell assembly including a plurality of stacked battery cells; a battery control assembly electrically connected to the battery cells, and the above-mentioned heat dissipation
  • the radiator is mounted on the battery control assembly, and the radiator is used to dissipate heat from the battery control assembly.
  • the battery control assembly includes a circuit board; the battery pack includes a heat-conducting plate, one surface of the heat-conducting plate is attached to the outer surface of the casing, and the other surface of the heat-conducting plate is attached to the outer surface of the casing. A heating element surface attached to the circuit board.
  • an electrical device including the battery pack as described above.
  • the beneficial effects of the present application include: different from the prior art, the present application is provided with a shell and a phase change material, the shell is provided with a closed hollow cavity, the phase change material is placed in the hollow cavity, and when the phase change material does not undergo a phase change, The phase change material does not exceed 95% of the volume of the hollow cavity, so set up in this way, when the temperature of the heating element on the BMS board rises and reaches the phase change temperature of the phase change material, the phase change material undergoes a phase change and absorbs the heating element on the BMS board.
  • the heat generated by the device improves the heat dissipation of the BMS board and reduces the probability of damage to the components on the BMS board due to the high temperature rise of the BMS board.
  • the phase change material does not exceed 95% of the volume of the hollow cavity, which can reduce the overflow of the phase change material from the casing when the phase change occurs, thereby affecting the heat dissipation effect of the radiator.
  • FIG. 1 is an exploded schematic diagram of the overall structure of a radiator according to an embodiment of the present application.
  • FIG. 2 is a schematic diagram of the overall structure assembly of the radiator according to the embodiment of the present application.
  • FIG. 3 is a schematic diagram of a partial structure of an embodiment of a heat sink according to an embodiment of the present application.
  • FIG. 4 is a schematic diagram of a partial structure of another embodiment of the heat sink according to the embodiment of the present application.
  • Fig. 5 is the side sectional view of Fig. 2;
  • FIG. 6 is a schematic diagram of a partial structure of an embodiment of a heat sink according to an embodiment of the present application.
  • FIG. 7 is a schematic diagram of an assembly structure of an embodiment of a heat sink according to an embodiment of the present application.
  • FIG. 8 is an exploded schematic diagram of the overall structure of another embodiment of the radiator of the present application.
  • FIG. 9 is a schematic diagram of the overall structure assembly of another embodiment of the radiator of the present application.
  • FIG. 10 is a schematic diagram of the partial structure assembly of another embodiment of the heat sink of the present application.
  • FIG. 11 is an exploded schematic diagram of the overall structure of a battery pack according to another embodiment of the present application.
  • FIG. 12 is a schematic partial structure diagram of a battery pack according to another embodiment of the present application.
  • the heat sink 01 includes a housing 10 and a phase change material 20 .
  • the phase change material 20 is disposed in the casing 10 .
  • the phase change material means that when the external temperature reaches the phase change temperature of the phase change material, the phase change material undergoes a phase change and can absorb high heat from the outside to reduce the external temperature.
  • the heat sink 01 further includes an encapsulation film 90 , the encapsulation film 90 wraps the phase change material 20 and restricts the flow of the phase change material 20 .
  • the encapsulation film 90 includes an aluminum-plastic film, but is not limited to encapsulating with an aluminum-plastic film.
  • the housing 10 is provided with a closed hollow cavity 10a, the hollow cavity 10a is used for placing the phase change material 20, and the housing 10 has high thermal conductivity
  • the housing 10 is made of aluminum, but it is not limited to aluminum, and can also be other materials, as long as the housing 10 has high thermal conductivity, such as copper and the like.
  • the thickness of the casing 10 is 0.5mm-4mm.
  • the inner surface of the housing 10 is extended with a first tooth piece 101 toward the direction of the hollow cavity 10a, and the first tooth piece 101 can be enlarged and
  • the contact area of the phase change material 20 that is, the contact area between the phase change material 20 and the casing 10 is increased, which improves the heat absorption efficiency of the phase change material 20 during the phase change.
  • the outer surface of the housing 10 extends away from the hollow cavity 10 a with a second tooth piece 102 , and the second tooth piece 102 can enlarge the housing
  • the contact area between 10 and the outside air improves the heat dissipation efficiency of the casing 10, and at the same time, the casing 10 is dissipated by using the principle of natural convection heat dissipation.
  • the second teeth 102 can be connected with other cooling plates or coolants to dissipate heat.
  • the housing 10 is provided with a boss 103, and the boss 103 is used to increase the contact area with the component to be radiated, and to improve the heat dissipation of the heat sink 01 to the component to be radiated.
  • the housing 10 includes a first housing 104 , a second housing 105 and a third housing 106 , and the hollow cavity 10 a is formed from the first housing 104 .
  • the first end of the first shell 104 penetrates the first shell 104 toward the second end of the first shell 104
  • the second shell 105 is disposed at the first end of the first shell 104
  • the third shell The body 106 is disposed at the second end of the first casing 104 to seal both ends of the hollow cavity 10a to form a closed hollow cavity 10a.
  • the second casing 105 and the third casing 106 and the first casing 104 may be fixed by screw connection, but not limited to screw connection, and may also be fixed by other means, such as: Welding and other seamless connection and fixing methods.
  • the first casing 104 is provided with a first opening 104 a , and the phase change material 20 is disposed in the first casing 104 through the first opening 104 a , the encapsulation film 90 is coated on the phase change material 20 .
  • the encapsulation film 90 covers the outer surface of the phase change material 20 , and seals the phase change material 20 in the encapsulation film 90 to limit the movement of the phase change material 20 .
  • the first casing 104 closes the first opening 104 a to restrict the flow of the phase change material 20 in the first casing 104 .
  • the housing 10 includes a fourth housing 107 , and the fourth housing 107 is provided with a first receiving cavity 107 a and communicates with the first receiving cavity 107 a
  • the second opening 1071 of the first accommodating cavity 107a can be used for accommodating the phase change material 20, the phase change material 20 is disposed in the fourth housing 107 through the second opening 1071, and the packaging film 90 is attached to the On the fourth casing 107 and the phase change material 20 , the flow of the phase change material 20 in the fourth casing 107 is restricted.
  • the phase change material 20 is disposed in the hollow cavity 10a.
  • the phase change material 20 is a solid phase change material 20.
  • the phase change material 20 does not exceed 95% of the volume of the hollow cavity 10a, which can reduce the phase change material 20
  • the phase change material 20 does not exceed 95% of the volume of the hollow cavity 10a.
  • the ambient temperature is 20 degrees Celsius to 30 degrees Celsius, the phase change material 20 does not exceed 95% of the volume of the hollow cavity 10a.
  • phase change material has not undergone a phase change means that the ambient temperature where the phase change material is located is lower than the phase change temperature of the phase change material. For example, when the ambient temperature is 25 degrees Celsius, if the phase change temperature of the phase change material is 60 degrees Celsius, at this time, since the ambient temperature of the phase change material is lower than the phase change temperature of the phase change material, the phase change material is in a phase change state that does not occur. change state.
  • the phase transition temperature refers to the critical temperature when a substance transitions between different phases, such as the temperature required for a phase change material to change from a solid state to a liquid state, a gaseous state, or a melted state.
  • the phase change temperature of the phase change material 20 is 60 degrees Celsius to 180 degrees Celsius, the phase change material 20 undergoes a phase change, absorbs the heat generated by the heating element or the heat in the surrounding environment, and reduces the temperature of the heating element. temperature.
  • the phase change temperature of the phase change material 20 is 90 degrees Celsius to 180 degrees Celsius, the phase change material 20 undergoes a phase change, absorbs the heat generated by the heating element or the heat in the surrounding environment, and reduces the temperature of the heating element. temperature.
  • the phase change temperature of the phase change material 20 is 90 degrees Celsius to 150 degrees Celsius, the phase change material 20 undergoes a phase change, absorbs the heat generated by the heating element or the heat in the surrounding environment, and reduces the temperature of the heating element. temperature.
  • the phase change temperature of the phase change material 20 is 130 degrees Celsius to 150 degrees Celsius, the phase change material 20 undergoes a phase change, absorbs the heat generated by the heating element or the heat in the surrounding environment, and reduces the temperature of the heating element. temperature.
  • the phase change enthalpy of the phase change material 20 is greater than 60 J/g, which means that each gram of the phase change material 20 can absorb more than 60 joules of energy when the phase change occurs.
  • the phase change enthalpy value of the phase change material 20 ranges from 80J/g to 250J/g, which means that each gram of the phase change material 20 can absorb 80 to 250 joules of energy when the phase change occurs. .
  • the phase change enthalpy of the phase change material 20 ranges from 150J/g to 250J/g, which means that each gram of the phase change material 20 can absorb 150 to 250 joules of energy when the phase change occurs. , each gram of the phase change material 20 absorbs more energy at this time.
  • the housing 10 by providing the housing 10 and the phase change material 20, the housing 10 is provided with a closed hollow cavity 10a, the phase change material 20 is arranged in the hollow cavity 10a, and when the phase change material 20 does not undergo a phase change , the phase change material 20 does not exceed 95% of the volume of the hollow cavity 10a, so that when the temperature of the heating element on the BMS board rises and reaches the phase change temperature of the phase change material 20, the phase change material 20 undergoes a phase change, Absorb the heat generated by the heating components on the BMS board, improve the heat dissipation of the BMS board, and reduce the probability of damage to the components on the BMS board due to the high temperature rise of the BMS board.
  • the phase change material 20 does not exceed 95% of the volume of the hollow cavity 10a, which can reduce the overflow of the phase change material 20 from the casing 10 when the phase change occurs, thereby affecting the heat dissipation effect of the heat sink.
  • the present application also provides an embodiment of a battery pack 100.
  • the battery pack 100 includes a cell assembly 30, a battery control assembly 40, a heat conducting plate 50, a battery casing 60, a first cover plate 70, The second cover plate 80 and the heat sink 01 described above.
  • the cell assembly 30 , the battery control assembly 40 and the heat conducting plate 50 are all disposed in the battery casing 60
  • the first cover plate 70 is disposed on one end of the battery casing 60
  • the second cover plate 80 is disposed on the other side of the battery casing 60 .
  • the battery control assembly 40 is electrically connected to the battery cell assembly 30 , the radiator 01 is mounted on the battery control assembly 40 , and the radiator 01 is used to dissipate heat from the battery control assembly 40 .
  • the function of the radiator 01 is the same as For the structure, reference may be made to the above-mentioned embodiments, which will not be repeated here.
  • the cell assembly 30 includes a plurality of stacked cells (not shown), and the battery control assembly 40 is electrically connected to the described battery.
  • the cell assembly 30 can be used for charging and discharging, and the battery control assembly 40 is used for controlling the charging and discharging of the cell assembly 30 to protect the cell assembly 30 .
  • the battery control assembly 40 includes a circuit board 401, and the circuit board 401 can be used to stabilize the voltage of the battery pack and protect the battery pack from working normally.
  • the circuit board 401 will detect the voltage of the battery cell. When the battery cell power is too low, it will stop outputting power to protect the battery cell.
  • the circuit board When the battery pack is in the charging process, when the battery is fully charged, the circuit board will 401 can automatically disconnect the charging circuit to avoid damage to the battery due to overcharging.
  • thermally conductive plate 50 As shown in FIG. 11 and FIG. 12, one surface of the thermally conductive plate 50 is attached to the outer surface of the housing 10, and the other surface of the thermally conductive plate 50 is attached to the heating element, Realize the heat dissipation of the heating element.
  • the material for making the thermally conductive plate 50 may be thermally conductive interface materials such as thermally conductive silicone pads, thermally conductive silicone grease, and thermally conductive mud.
  • the number of the heat-conducting plates 50 is two, and the two heat-conducting plates 50 are respectively disposed on both sides of the boss 103 to increase the contact area between the heat-conducting plate 50 and the radiator housing 10 , Improve the heat conduction to the heating element and effectively protect the heating element.
  • the heat-conducting plate 50 is provided with a concave portion (not shown), and the concave portion is used for plugging the boss 103 on the casing 10 , which can increase the distance between the heat-conducting plate 50 and the radiator casing 10 . Contact area, improve the heat conduction to the heating element, and effectively protect the heating element.
  • the battery case 60 is provided with a second accommodating cavity and a third opening (not shown) communicating with the second accommodating cavity,
  • the first cover plate 70 covers one end of the battery case 60
  • the second cover plate 80 covers the other end of the battery case 60
  • the second accommodating cavity forms a closed cavity.
  • the second accommodating cavity can be used for accommodating the battery cell assembly, the battery control assembly 40 and the heat conducting plate 50 .
  • the battery housing 60 can reduce the contact between the internal components of the battery pack and the external components, limit external dust, and reduce the probability of short circuit of the internal components of the battery pack caused by the external components.
  • the application also provides an embodiment of an electrical device, the electrical device includes the above battery pack, the electrical device includes but is not limited to two-wheeled electric vehicles, energy storage devices, hand-held power tools, etc., the function of the battery pack Reference may be made to the above-mentioned embodiments for the structure and structure, which will not be repeated here.
  • phase transition temperature and phase transition enthalpy of the phase change material are different values.
  • the specific test process is as follows:
  • Test materials battery pack, heating element MOS tube, multi-channel thermometer, common tooth radiator, radiator, thermal silica pad, wherein the battery pack includes battery module, battery control component BMS board and shell components.
  • Comparative Example 1 No heat dissipation measures were taken for the MOS tube of the heating element.
  • Comparative example 2 The common toothed radiator is fixed on the BMS board by bolts and is located above the two rows of MOS tubes.
  • the toothed radiator is connected to the two rows of MOS tubes through two thermally conductive silicone pads.
  • the MOS tubes are generated during the charging and discharging process. The heat is introduced into the toothed radiator through the thermally conductive silicone pad, and dissipated by the principle of natural convection.
  • MOS tube temperature rise test method put the battery pack in a 25°C incubator, let it stand for 1 hour to make the battery pack reach a constant temperature, then charge the battery pack with a constant current of 45A to a total voltage of 83V, and then charge it with a constant voltage of 83V to a current After that, let the battery pack stand for 2 hours, and then discharge the battery pack with a constant current of 130A until the total voltage is 60V, and use a multi-channel thermometer to monitor the temperature of the MOS tube during the charging and discharging process of the battery pack.
  • Test method for phase change material overflow place the radiator in a 150°C high temperature box for 120 hours, then take the radiator out of the high temperature box and observe whether the phase change material in the radiator overflows from the package gap.
  • the radiator is fixed on the BMS board by bolts and is located above the two rows of MOS tubes.
  • the radiator is connected to the two rows of MOS tubes through two thermally conductive silicone pads.
  • the heat generated by the MOS tubes during the charging and discharging process It is conducted into the radiator through the thermally conductive silicone pad, and at the same time, the radiator absorbs most of the heat through phase change heat storage and dissipates part of the heat through the principle of natural convection heat dissipation.
  • the two ends of the first shell of the radiator are connected to the second shell and the third shell through bolts, and the phase change material fills 95% of the volume of the hollow cavity, and the phase change enthalpy value of the phase change material in the radiator is fixed as 200J/g, and the phase transition temperatures are 50°C, 60°C, 90°C, 130°C, 150°C, 180°C, and 190°C, respectively.
  • the radiator is fixed on the BMS board by bolts and is located above the two rows of MOS tubes.
  • the radiator is connected to the two rows of MOS tubes through two thermally conductive silicone pads.
  • the heat generated by the MOS tubes during the charging and discharging process It is conducted into the radiator through the thermally conductive silicone pad, and at the same time, the radiator absorbs most of the heat through phase change heat storage and dissipates part of the heat through the principle of natural convection heat dissipation.
  • the two ends of the first shell of the radiator are connected and packaged with the second shell and the third shell through bolts, the phase change material fills 95% of the volume of the hollow cavity, and the phase change temperature of the phase change material is fixed at 130°C.
  • the phase transition enthalpy values are 50J/g, 60J/g, 80J/g, 100J/g, 150J/g, and 250J/g, respectively.
  • the radiator is fixed on the BMS board by bolts and is located above the two rows of MOS tubes.
  • the radiator is connected to the two rows of MOS tubes through two thermally conductive silicone pads.
  • the heat generated by the MOS tubes during the charging and discharging process It is conducted into the radiator through the thermally conductive silicone pad, and at the same time, the radiator absorbs most of the heat through phase change heat storage and dissipates part of the heat through the principle of natural convection heat dissipation.
  • the two ends of the first shell of the radiator are connected and packaged with the second shell and the third shell through bolts.
  • phase transition temperature in the radiator is fixed at 130°C, and the phase transition enthalpy value is fixed at 200J/g, so that the heat dissipation can be achieved.
  • the phase change material in the device fills 100%, 98%, 96% and 90% of the hollow cavity respectively.
  • the phase change temperature of the phase change material is in the range of 50°C to 190°C. Compared with the embodiment without heat dissipation measures, the phase change temperature of the phase change material is 60°C. When the temperature is in the range of -180°C, it has obvious heat dissipation effect on the MOS tube of the heating element.
  • Example C group it can be seen from the test data in Example C group that when the phase change material potting occupies 90% of the volume of the hollow cavity, the phase change material is not easy to overflow from the package gap, and compared with A4 in Example A group, it can be seen that the phase change material When the proportion of the material potting cavity is 90%-95%, the phase change material is not easy to overflow from the package gap, and the phase change material can dissipate heat normally at this time.
  • the heat dissipation effect of the radiator is generally better than that of the toothed radiator, and the heat dissipation effect of the variable heat sink is related to the phase change temperature and phase change enthalpy value of the phase change material.
  • the heat dissipation effect of the heat sink B4 in Example B group is more obvious, that is, the phase transition temperature is 130 ° C, the phase transition enthalpy value is 250 J/g, and the ratio of the phase change material to encapsulate the hollow cavity is 95%.
  • the MOS tube is cooled down.
  • the amplitude is 45 °C, the cooling effect of the radiator is obvious, and there is no overflow of the phase change material.

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  • Chemical & Material Sciences (AREA)
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Abstract

The present application relates to the technical field of battery pack apparatuses, and in particular, discloses a heat dissipation device, a battery pack, and an electrical device. The heat dissipation device comprises: a housing and a phase change material. The housing is provided with a closed hollow cavity, the phase change material is provided in the hollow cavity, and when the phase change material does not have a phase change, the phase change material does not exceed 95% of the volume of the hollow cavity. In this way, according to the present application, when the temperature of a heating element on a battery management system board (BMS board) rises and a phase change temperature of the phase change material is reached, the phase change material has the phase change, and heat generated by the heating element on the BMS board is absorbed, the heat dissipation of the BMS board is greatly improved, the probability that an element on the BMS is damaged due to high temperature rise of the BMS board is reduced; moreover, when the phase change material has the phase change, overflow of the phase change material from the housing so as to affect the heat dissipation effect of the heat dissipation device can be reduced.

Description

一种散热器、电池包及用电设备A radiator, battery pack and electrical equipment
相关申请的交叉参考CROSS-REFERENCE TO RELATED APPLICATIONS
本申请要求于2021年03月31日提交中国专利局，申请号为202110348844.5，名称为“一种散热器、电池包及用电设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。This application claims the priority of the Chinese patent application with the application number 202110348844.5 and the title of "A radiator, battery pack and electrical equipment", which was filed with the China Patent Office on March 31, 2021, the entire contents of which are incorporated by reference in in this application.
技术领域technical field
本申请及电池包装置技术领域，特别是涉及一种散热器、电池包及用电设备。The present application and the technical field of battery pack devices, in particular, relate to a radiator, a battery pack and electrical equipment.
背景技术Background technique
目前市场上，对两轮电动车的充电及驾驶性能要求越来越高，两轮电动车的电池包趋于向快充和高倍率放电方向发展。其中，电池包通常设置有电池包控制组件电池管理***板(BMS板)和散热器，其中散热器通常设置于BMS板上，通常利用散热器的自然对流散热原理对BMS板起到散热作用，自然对流散热指的是由参与换热的流体由于各部分温度不均匀形成密度差所引起的对流换热现象，但往往利用自然对流散热原理的散热器对BMS板进行散热效果不佳。In the current market, the requirements for the charging and driving performance of two-wheeled electric vehicles are getting higher and higher, and the battery packs of two-wheeled electric vehicles tend to develop in the direction of fast charging and high-rate discharge. Among them, the battery pack is usually provided with a battery pack control assembly battery management system board (BMS board) and a radiator, wherein the radiator is usually set on the BMS board, and the natural convection heat dissipation principle of the radiator is usually used to dissipate heat on the BMS board. Natural convection heat dissipation refers to the convective heat transfer phenomenon caused by the uneven temperature of each part of the fluid participating in the heat exchange, resulting in a density difference. However, the radiator that uses the principle of natural convection heat dissipation is often ineffective in cooling the BMS board.
申请内容Application content
本申请的发明人发现两轮电动车的电池包在快充和高倍率放电过程中，电池包控制组件BMS板上的发热元器件温升较高，而BMS板通常位于电池包内封闭的环境，气体流动速度很小，常规散热器往往达不到较好的散热效果。鉴于上述问题，本申请提供了一种散热器、电池包及用电设备，改善散热器散热效果不佳的问题。The inventor of the present application found that during the fast charging and high-rate discharging process of the battery pack of the two-wheeled electric vehicle, the temperature rise of the heating components on the BMS board of the battery pack control component is relatively high, and the BMS board is usually located in a closed environment inside the battery pack. , the gas flow speed is very small, and conventional radiators often cannot achieve good heat dissipation effect. In view of the above problems, the present application provides a radiator, a battery pack and an electrical device to improve the problem of poor heat dissipation effect of the radiator.
根据本发申请的一个方面，提供了一种散热器，包括：壳体，设置有封闭的中空腔；相变材料，设置于所述中空腔内，所述相变材料未发生相变时，所述相变材料不超过所述中空腔体积的95％。According to an aspect of the present application, there is provided a heat sink, comprising: a casing provided with a closed hollow cavity; a phase change material disposed in the hollow cavity, and when the phase change material does not undergo a phase change, The phase change material does not exceed 95% of the volume of the hollow cavity.
在一种可选的方式中，所述相变材料不超过所述中空腔体积的90％-95％。In an optional manner, the phase change material does not exceed 90%-95% of the volume of the hollow cavity.
在一种可选的方式中，所述相变材料的相变温度为60摄氏度-180摄氏度，相变材料发生相变吸收发热元件产生的热量，降低发热元件的温度。In an optional manner, the phase change temperature of the phase change material is 60 degrees Celsius to 180 degrees Celsius, and the phase change material undergoes a phase change to absorb the heat generated by the heating element and reduce the temperature of the heating element.
在一种可选的方式中，所述相变材料的相变温度为90摄氏度-180摄氏度，所述相变材料发生相变，吸收发热元件产生的热量或所处环境的热量。In an optional manner, the phase change temperature of the phase change material is 90 degrees Celsius to 180 degrees Celsius, and the phase change material undergoes a phase change to absorb the heat generated by the heating element or the heat of the environment where it is located.
在一种可选的方式中，所述相变材料的相变温度为90摄氏度-150摄氏度，所述相变材料发生相变，以吸收发热元件产生的热量。In an optional manner, the phase change temperature of the phase change material is 90 degrees Celsius to 150 degrees Celsius, and the phase change material undergoes a phase change to absorb the heat generated by the heating element.
在一种可选的方式中，所述相变材料的相变温度为130摄氏度-150摄氏度，所述相变材料发生相变，吸收发热元件产生的热量或所处环境的热量。In an optional manner, the phase change temperature of the phase change material is 130 degrees Celsius to 150 degrees Celsius, and the phase change material undergoes a phase change to absorb the heat generated by the heating element or the heat of the environment where it is located.
在一种可选的方式中，所述相变材料的相变焓值大于60J/g，表示每一克的相变材料在发生相变时可吸收大于60焦耳的能量。In an optional manner, the phase-change enthalpy value of the phase-change material is greater than 60 J/g, which means that each gram of the phase-change material can absorb more than 60 joules of energy when a phase change occurs.
在一种可选的方式中，所述相变材料的相变焓值范围为80J/g-250J/g，表示每一克的相变材料在发生相变时可吸收80焦耳至250焦耳的能量。In an optional manner, the phase change enthalpy value of the phase change material ranges from 80J/g to 250J/g, which means that each gram of the phase change material can absorb 80 to 250 joules of energy during phase change. energy.
在一种可选的方式中，所述相变材料的相变焓值范围为150J/g-250J/g，表示每一克的相变材料在发生相变时可吸收150焦耳至250焦耳的能量，每一克相变材料此时吸收的能量较多。In an optional manner, the phase change enthalpy of the phase change material ranges from 150J/g to 250J/g, which means that each gram of the phase change material can absorb 150 to 250 joules of Energy, each gram of phase change material absorbs more energy at this time.
在一种可选的方式中，所述壳体的内表面朝所述中空腔延伸有第一齿片，所述第一齿片可增大与相变材料的接触面积，即相变材料与壳体的接触面积增大，提高了相变材料相变时吸收热量的效率。In an optional manner, the inner surface of the housing has a first tooth piece extending toward the hollow cavity, and the first tooth piece can increase the contact area with the phase change material, that is, the phase change material and the The contact area of the shell is increased, which improves the heat absorption efficiency of the phase change material during phase change.
在一种可选的方式中，所述壳体的外表面设置有凸台；所述导热板设置有凹部，所述凸台插接于所述凹部，所述凸台用于增大与被散热部件的接触面积，提高散热器对被散热部件的散热。In an optional manner, the outer surface of the casing is provided with a boss; the heat-conducting plate is provided with a concave portion, the boss is inserted into the concave portion, and the boss is used to increase and be The contact area of the heat-dissipating component improves the heat dissipation of the heat sink to the heat-dissipating component.
在一种可选的方式中，所述壳体包括第一壳体、第二壳体和第三壳体；所述第二壳体设置于所述第一壳体的第一端，所述第三壳体设置于所述第一壳体的第二端，由所述第一壳体、第二壳体和第三壳体围合形成封闭的中空腔。In an optional manner, the casing includes a first casing, a second casing and a third casing; the second casing is provided at the first end of the first casing, and the The third casing is disposed at the second end of the first casing, and a closed hollow cavity is formed by the first casing, the second casing and the third casing.
在一种可选的方式中，所述散热器包括封装膜，所述封装膜包覆所述相变材料，所述封装膜限制所述相变材料的流动。In an optional manner, the heat sink includes an encapsulation film, the encapsulation film covers the phase change material, and the encapsulation film restricts the flow of the phase change material.
根据本申请实施例的另一方面，提供了一种电池包，包括：电芯组件，包括多个堆叠设置的电芯；电连接于所述电芯的电池控制组件，及如上所述的散热器，所述散热器安装于所述于电池控制组件，所述散热器用于对所述电池控制组件进行散热。According to another aspect of the embodiments of the present application, a battery pack is provided, including: a battery cell assembly including a plurality of stacked battery cells; a battery control assembly electrically connected to the battery cells, and the above-mentioned heat dissipation The radiator is mounted on the battery control assembly, and the radiator is used to dissipate heat from the battery control assembly.
在一种可选的方式中，所述电池控制组件包括电路板；所述电池包包括导热板，所述导热板的一表面贴附于所述壳体的外表面，所述导热板的另一表面贴附于所述电路板上的发热元件。In an optional manner, the battery control assembly includes a circuit board; the battery pack includes a heat-conducting plate, one surface of the heat-conducting plate is attached to the outer surface of the casing, and the other surface of the heat-conducting plate is attached to the outer surface of the casing. A heating element surface attached to the circuit board.
根据本申请实施例的另一个方面，提供了一种用电设备，包括如上所述的电池包。According to another aspect of the embodiments of the present application, an electrical device is provided, including the battery pack as described above.
本申请的有益效果包括：区别于现有技术，本申请通过设置壳体和相变材料，壳体设置封闭的中空腔，相变材料置于中空腔内，相变材料未发生相变时，相变材料不超过中空腔体积的95％，这样设置，在BMS板上的发热元器件温度升高且达到相变材料的相变温度时，相变材料发生相变，吸收BMS板上发热元器件产生的热量，提高了对BMS板的散热，降低了BMS板上的元器件因BMS板温升过高而损坏的几率。同时，相变材料不超过中空腔体积的95％，可减少相变材料发生相变时从壳体内溢出而影响散热器的散热效果。The beneficial effects of the present application include: different from the prior art, the present application is provided with a shell and a phase change material, the shell is provided with a closed hollow cavity, the phase change material is placed in the hollow cavity, and when the phase change material does not undergo a phase change, The phase change material does not exceed 95% of the volume of the hollow cavity, so set up in this way, when the temperature of the heating element on the BMS board rises and reaches the phase change temperature of the phase change material, the phase change material undergoes a phase change and absorbs the heating element on the BMS board. The heat generated by the device improves the heat dissipation of the BMS board and reduces the probability of damage to the components on the BMS board due to the high temperature rise of the BMS board. At the same time, the phase change material does not exceed 95% of the volume of the hollow cavity, which can reduce the overflow of the phase change material from the casing when the phase change occurs, thereby affecting the heat dissipation effect of the radiator.
附图说明Description of drawings
为了更清楚地说明本申请具体实施例或现有技术中的技术方案，下面将对具体实施例或现有技术描述中所需要使用的附图作简单地介绍。在所有附图中，类似的元件或部分一般由类似的附图标记标识。附图中，各元件或部分并不一定按照实际的比例绘制。In order to illustrate the specific embodiments of the present application or the technical solutions in the prior art more clearly, the following briefly introduces the drawings that are required to be used in the description of the specific embodiments or the prior art. Similar elements or parts are generally identified by similar reference numerals throughout the drawings. In the drawings, each element or section is not necessarily drawn to actual scale.
图1是本申请实施例散热器的整体结构***示意图；1 is an exploded schematic diagram of the overall structure of a radiator according to an embodiment of the present application;
图2是本申请实施例散热器的整体结构组装示意图；FIG. 2 is a schematic diagram of the overall structure assembly of the radiator according to the embodiment of the present application;
图3是本申请实施例散热器的一实施例局部结构示意图；3 is a schematic diagram of a partial structure of an embodiment of a heat sink according to an embodiment of the present application;
图4是本申请实施例散热器的另一实施例局部结构示意图；4 is a schematic diagram of a partial structure of another embodiment of the heat sink according to the embodiment of the present application;
图5是图2的侧面剖视图；Fig. 5 is the side sectional view of Fig. 2;
图6是本申请实施例散热器的一实施例局部结构示意图；6 is a schematic diagram of a partial structure of an embodiment of a heat sink according to an embodiment of the present application;
图7是本申请实施例散热器的一实施例的组装结构示意图；7 is a schematic diagram of an assembly structure of an embodiment of a heat sink according to an embodiment of the present application;
图8是本申请散热器的另一实施例整体结构***示意图；8 is an exploded schematic diagram of the overall structure of another embodiment of the radiator of the present application;
图9是本申请散热器的另一实施例整体结构组装示意图；9 is a schematic diagram of the overall structure assembly of another embodiment of the radiator of the present application;
图10是本申请散热器的另一实施例局部结构组装示意图；FIG. 10 is a schematic diagram of the partial structure assembly of another embodiment of the heat sink of the present application;
图11是本申请另一实施例电池包的整体结构***示意图；11 is an exploded schematic diagram of the overall structure of a battery pack according to another embodiment of the present application;
图12是本申请另一实施例电池包的局部结构示意图。FIG. 12 is a schematic partial structure diagram of a battery pack according to another embodiment of the present application.
附图说明：10、壳体；10a、中空腔；101、第一齿片；102、第二齿片；103、凸台；104、第一壳体；104a、第一开口；105、第二壳体；106、第三壳体；107、第四壳体；107a、第一收容腔；1071、第二开口； 20、相变材料；30、电芯组件；40、电池控制组件；401、电路板；50、导热板；60、电池外壳；70、第一盖板；80、第二盖板；90、封装膜。Description of drawings: 10, housing; 10a, hollow cavity; 101, first tooth; 102, second tooth; 103, boss; 104, first housing; 104a, first opening; 105, second shell; 106, third shell; 107, fourth shell; 107a, first receiving cavity; 1071, second opening; 20, phase change material; 30, battery cell assembly; 40, battery control assembly; 401, circuit board; 50, heat conduction plate; 60, battery casing; 70, first cover plate; 80, second cover plate; 90, packaging film.
具体实施方式Detailed ways
为了便于理解本申请，下面结合附图和具体实施例，对本申请进行更详细的说明。需要说明的是，当元件被表述“固定于”另一个元件，它可以直接在另一个元件上、或者其间可以存在一个或多个居中的元件。当一个元件被表述“连接”另一个元件，它可以是直接连接到另一个元件、或者其间可以存在一个或多个居中的元件。本说明书所使用的术语“垂直的”、“水平的”、“左”、“右”以及类似的表述只是为了说明的目的。In order to facilitate the understanding of the present application, the present application will be described in more detail below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element, or one or more intervening elements may be present therebetween. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or one or more intervening elements may be present therebetween. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this specification are for illustrative purposes only.
除非另有定义，本说明书所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同。本说明书中在本申请的说明书中所使用的术语只是为了描述具体的实施例的目的，不是用于限制本申请。本说明书所使用的术语“和/或”包括一个或多个相关的所列项目的任意的和所有的组合。Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the technical field belonging to this application. The terms used in the specification of the present application in this specification are for the purpose of describing specific embodiments only, and are not intended to limit the present application. As used in this specification, the term "and/or" includes any and all combinations of one or more of the associated listed items.
请参阅图1，散热器01包括壳体10和相变材料20。所述相变材料20设置于所述壳体10内。相变材料是指在外界温度达到相变材料的相变温度时，相变材料发生相变，可吸收外界高热量，以降低外界温度。Referring to FIG. 1 , the heat sink 01 includes a housing 10 and a phase change material 20 . The phase change material 20 is disposed in the casing 10 . The phase change material means that when the external temperature reaches the phase change temperature of the phase change material, the phase change material undergoes a phase change and can absorb high heat from the outside to reduce the external temperature.
散热器01还包括封装膜90，所述封装膜90包覆相变材料20，限制相变材料20流动。优选的，所述封装膜90包括铝塑膜，但不限于利用铝塑膜封装。The heat sink 01 further includes an encapsulation film 90 , the encapsulation film 90 wraps the phase change material 20 and restricts the flow of the phase change material 20 . Preferably, the encapsulation film 90 includes an aluminum-plastic film, but is not limited to encapsulating with an aluminum-plastic film.
对于上述壳体10，如图1和图2所示，壳体10设置有封闭的中空腔10a，所述中空腔10a用于放置相变材料20，同时所述壳体10具有较高的导热性，所述壳体10的制作材料包括铝，但不限于为铝材料，也可以为其他材料，只要满足壳体10具有较高的导热性即可，例如：铜等等。优选的，所述壳体10的厚度为0.5mm-4mm。For the above housing 10, as shown in FIG. 1 and FIG. 2, the housing 10 is provided with a closed hollow cavity 10a, the hollow cavity 10a is used for placing the phase change material 20, and the housing 10 has high thermal conductivity The housing 10 is made of aluminum, but it is not limited to aluminum, and can also be other materials, as long as the housing 10 has high thermal conductivity, such as copper and the like. Preferably, the thickness of the casing 10 is 0.5mm-4mm.
在一些实施例中，如图1和图3所示，所述壳体10的内表面朝所述中空腔10a的方向延伸有第一齿片101，所述第一齿片101可增大与相变材料20的接触面积，即相变材料20与壳体10的接触面积增大，提高了相变材料20相变时吸收热量的效率。In some embodiments, as shown in FIG. 1 and FIG. 3 , the inner surface of the housing 10 is extended with a first tooth piece 101 toward the direction of the hollow cavity 10a, and the first tooth piece 101 can be enlarged and The contact area of the phase change material 20 , that is, the contact area between the phase change material 20 and the casing 10 is increased, which improves the heat absorption efficiency of the phase change material 20 during the phase change.
在一些实施例中，如图1和图4所示，所述壳体10的外表面朝远离中空腔10a的方向延伸有第二齿片102，所述第二齿片102可增大壳体10与外界空气的接触面积，提高壳体10的散热效率，同时利用自然 对流散热原理对壳体10进行散热。在其他的一些实施例中，所述第二齿片102可与其他冷却板或冷却剂连接散热。In some embodiments, as shown in FIG. 1 and FIG. 4 , the outer surface of the housing 10 extends away from the hollow cavity 10 a with a second tooth piece 102 , and the second tooth piece 102 can enlarge the housing The contact area between 10 and the outside air improves the heat dissipation efficiency of the casing 10, and at the same time, the casing 10 is dissipated by using the principle of natural convection heat dissipation. In other embodiments, the second teeth 102 can be connected with other cooling plates or coolants to dissipate heat.
在一些实施例中，所述壳体10的设置有凸台103，所述凸台103用于增大与被散热部件的接触面积，提高散热器01对被散热部件的散热。In some embodiments, the housing 10 is provided with a boss 103, and the boss 103 is used to increase the contact area with the component to be radiated, and to improve the heat dissipation of the heat sink 01 to the component to be radiated.
在一些实施例中，如图1和图5所示，所述壳体10包括第一壳体104、第二壳体105和第三壳体106，所述中空腔10a自第一壳体104的第一端往第一壳体104的第二端方向贯穿所述第一壳体104，所述第二壳体105设置于所述第一壳体104的第一端，所述第三壳体106设置于所述第一壳体104的第二端，实现将所述中空腔10a的两端封闭，形成封闭的中空腔10a。In some embodiments, as shown in FIG. 1 and FIG. 5 , the housing 10 includes a first housing 104 , a second housing 105 and a third housing 106 , and the hollow cavity 10 a is formed from the first housing 104 . The first end of the first shell 104 penetrates the first shell 104 toward the second end of the first shell 104 , the second shell 105 is disposed at the first end of the first shell 104 , and the third shell The body 106 is disposed at the second end of the first casing 104 to seal both ends of the hollow cavity 10a to form a closed hollow cavity 10a.
在一些实施例中，所述第二壳体105和第三壳体106与第一壳体104的固定方式可为螺接，但不限于利用螺接固定，也可以为其他固定方式，例如：焊接等无缝连接固定方式。In some embodiments, the second casing 105 and the third casing 106 and the first casing 104 may be fixed by screw connection, but not limited to screw connection, and may also be fixed by other means, such as: Welding and other seamless connection and fixing methods.
在一些实施例中，如图6和图7所示，所述第一壳体104设有第一开口104a，所述相变材料20通过所述第一开口104a设于第一壳体104内，所述封装膜90包覆于所述相变材料20。优选的，所述封装膜90包覆于所述相变材料20的外表面，并将所述相变材料20密封于所述封装膜90内，限制相变材料20的移动。第一壳体104封闭第一开口104a，限制相变材料20在第一壳体104内流动。In some embodiments, as shown in FIGS. 6 and 7 , the first casing 104 is provided with a first opening 104 a , and the phase change material 20 is disposed in the first casing 104 through the first opening 104 a , the encapsulation film 90 is coated on the phase change material 20 . Preferably, the encapsulation film 90 covers the outer surface of the phase change material 20 , and seals the phase change material 20 in the encapsulation film 90 to limit the movement of the phase change material 20 . The first casing 104 closes the first opening 104 a to restrict the flow of the phase change material 20 in the first casing 104 .
在一些实施例中，如图8-图10所示，所述壳体10包括第四壳体107，所述第四壳体107设置有第一收容腔107a以及连通所述第一收容腔107a的第二开口1071，第一收容腔107a可用于收容相变材料20，所述相变材料20通过所述第二开口1071设于第四壳体107内，所述封装膜90贴附在所述第四壳体107和所述相变材料20上，限制相变材料20在第四壳体107内的流动。In some embodiments, as shown in FIGS. 8-10 , the housing 10 includes a fourth housing 107 , and the fourth housing 107 is provided with a first receiving cavity 107 a and communicates with the first receiving cavity 107 a The second opening 1071 of the first accommodating cavity 107a can be used for accommodating the phase change material 20, the phase change material 20 is disposed in the fourth housing 107 through the second opening 1071, and the packaging film 90 is attached to the On the fourth casing 107 and the phase change material 20 , the flow of the phase change material 20 in the fourth casing 107 is restricted.
对于上述相变材料20，如图1所示，所述相变材料20设置于所述中空腔10a内。优选的，相变材料20为固体相变材料20，所述相变材料20未发生相变时，所述相变材料20不超过所述中空腔10a体积的95％，可减少相变材料20发生相变时从壳体10内溢出，从而影响散热器的散热效果。优选的，在环境温度为20摄氏度到30摄氏度时，所述相变材料20不超过所述中空腔10a的体积的95％。For the above-mentioned phase change material 20, as shown in FIG. 1, the phase change material 20 is disposed in the hollow cavity 10a. Preferably, the phase change material 20 is a solid phase change material 20. When the phase change material 20 does not undergo a phase change, the phase change material 20 does not exceed 95% of the volume of the hollow cavity 10a, which can reduce the phase change material 20 When a phase change occurs, it overflows from the casing 10, thereby affecting the heat dissipation effect of the heat sink. Preferably, when the ambient temperature is 20 degrees Celsius to 30 degrees Celsius, the phase change material 20 does not exceed 95% of the volume of the hollow cavity 10a.
相变材料未发生相变指的是相变材料所处的环境温度低于相变材料的相变温度。例如，环境温度为25摄氏度时，若相变材料的相变温度为60摄氏度，此时，由于相变材料所处的环境温度低于相变材料的相变温度，相变材料处于未发生相变状态。此外，相变温度指的是：物 质在不同相之间转变时的临界温度，例如相变材料由固态变为液态、气态、融化状态等所需要的温度。The fact that the phase change material has not undergone a phase change means that the ambient temperature where the phase change material is located is lower than the phase change temperature of the phase change material. For example, when the ambient temperature is 25 degrees Celsius, if the phase change temperature of the phase change material is 60 degrees Celsius, at this time, since the ambient temperature of the phase change material is lower than the phase change temperature of the phase change material, the phase change material is in a phase change state that does not occur. change state. In addition, the phase transition temperature refers to the critical temperature when a substance transitions between different phases, such as the temperature required for a phase change material to change from a solid state to a liquid state, a gaseous state, or a melted state.
在一些实施例中，所述相变材料20的相变温度为60摄氏度-180摄氏度，所述相变材料20发生相变，吸收发热元件产生的热量或周围环境中的热量，降低发热元件的温度。In some embodiments, the phase change temperature of the phase change material 20 is 60 degrees Celsius to 180 degrees Celsius, the phase change material 20 undergoes a phase change, absorbs the heat generated by the heating element or the heat in the surrounding environment, and reduces the temperature of the heating element. temperature.
在一些实施例中，所述相变材料20的相变温度为90摄氏度-180摄氏度，所述相变材料20发生相变，吸收发热元件产生的热量或周围环境中的热量，降低发热元件的温度。In some embodiments, the phase change temperature of the phase change material 20 is 90 degrees Celsius to 180 degrees Celsius, the phase change material 20 undergoes a phase change, absorbs the heat generated by the heating element or the heat in the surrounding environment, and reduces the temperature of the heating element. temperature.
在一些实施例中，所述相变材料20的相变温度为90摄氏度-150摄氏度，所述相变材料20发生相变，吸收发热元件产生的热量或周围环境中的热量，降低发热元件的温度。In some embodiments, the phase change temperature of the phase change material 20 is 90 degrees Celsius to 150 degrees Celsius, the phase change material 20 undergoes a phase change, absorbs the heat generated by the heating element or the heat in the surrounding environment, and reduces the temperature of the heating element. temperature.
在一些实施例中，所述相变材料20的相变温度为130摄氏度-150摄氏度，所述相变材料20发生相变，吸收发热元件产生的热量或周围环境中的热量，降低发热元件的温度。In some embodiments, the phase change temperature of the phase change material 20 is 130 degrees Celsius to 150 degrees Celsius, the phase change material 20 undergoes a phase change, absorbs the heat generated by the heating element or the heat in the surrounding environment, and reduces the temperature of the heating element. temperature.
在一些实施例中，所述相变材料20的相变焓值大于60J/g，表示每一克的相变材料20在发生相变时可吸收大于60焦耳的能量。In some embodiments, the phase change enthalpy of the phase change material 20 is greater than 60 J/g, which means that each gram of the phase change material 20 can absorb more than 60 joules of energy when the phase change occurs.
在一些实施例中，所述相变材料20的相变焓值范围为80J/g-250J/g，表示每一克的相变材料20在发生相变时可吸收80焦耳至250焦耳的能量。In some embodiments, the phase change enthalpy value of the phase change material 20 ranges from 80J/g to 250J/g, which means that each gram of the phase change material 20 can absorb 80 to 250 joules of energy when the phase change occurs. .
在一些实施例中，所述相变材料20的相变焓值范围为150J/g-250J/g，表示每一克的相变材料20在发生相变时可吸收150焦耳至250焦耳的能量，每一克相变材料20此时吸收的能量较多。In some embodiments, the phase change enthalpy of the phase change material 20 ranges from 150J/g to 250J/g, which means that each gram of the phase change material 20 can absorb 150 to 250 joules of energy when the phase change occurs. , each gram of the phase change material 20 absorbs more energy at this time.
在本申请实施例中，通过设置有壳体10和相变材料20，壳体10设置有封闭的中空腔10a，相变材料20设置于中空腔10a内，相变材料20未发生相变时，相变材料20不超过中空腔10a的体积的95％，这样设置，在BMS板上的发热元器件温度升高且达到相变材料20的相变温度时，相变材料20发生相变，吸收BMS板上发热元器件产生的热量，提高了对BMS板的散热，降低了BMS板上的元器件因BMS板温升过高而损坏的几率。同时，相变材料20不超过中空腔10a体积的95％，可减少相变材料20发生相变时从壳体10内溢出而影响散热器的散热效果。In the embodiment of the present application, by providing the housing 10 and the phase change material 20, the housing 10 is provided with a closed hollow cavity 10a, the phase change material 20 is arranged in the hollow cavity 10a, and when the phase change material 20 does not undergo a phase change , the phase change material 20 does not exceed 95% of the volume of the hollow cavity 10a, so that when the temperature of the heating element on the BMS board rises and reaches the phase change temperature of the phase change material 20, the phase change material 20 undergoes a phase change, Absorb the heat generated by the heating components on the BMS board, improve the heat dissipation of the BMS board, and reduce the probability of damage to the components on the BMS board due to the high temperature rise of the BMS board. At the same time, the phase change material 20 does not exceed 95% of the volume of the hollow cavity 10a, which can reduce the overflow of the phase change material 20 from the casing 10 when the phase change occurs, thereby affecting the heat dissipation effect of the heat sink.
本申请还提供了一种电池包100的实施例，如图11、12所示，电池包100包括电芯组件30、电池控制组件40、导热板50、电池外壳60、第一盖板70、第二盖板80及以上所述的散热器01。其中，电芯组件30、电池控制组件40和导热板50均设置于电池外壳60内，第一盖板70盖设于电池外壳60的一端，第二盖板80盖设于电池外壳60的另一端， 电池控制组件40电连接于所述电芯组件30，散热器01安装于所述电池控制组件40上，散热器01用于对所述电池控制组件40进行散热，散热器01的功能和结构可参阅上述实施例，此处不再一一赘述。The present application also provides an embodiment of a battery pack 100. As shown in FIGS. 11 and 12, the battery pack 100 includes a cell assembly 30, a battery control assembly 40, a heat conducting plate 50, a battery casing 60, a first cover plate 70, The second cover plate 80 and the heat sink 01 described above. The cell assembly 30 , the battery control assembly 40 and the heat conducting plate 50 are all disposed in the battery casing 60 , the first cover plate 70 is disposed on one end of the battery casing 60 , and the second cover plate 80 is disposed on the other side of the battery casing 60 . At one end, the battery control assembly 40 is electrically connected to the battery cell assembly 30 , the radiator 01 is mounted on the battery control assembly 40 , and the radiator 01 is used to dissipate heat from the battery control assembly 40 . The function of the radiator 01 is the same as For the structure, reference may be made to the above-mentioned embodiments, which will not be repeated here.
对于上述电芯组件30和电池控制组件40，如图11和图12所示，所述电芯组件30包括多个堆叠设置的电芯(未标示)，所述电池控制组件40电连接于所述电芯。所述电芯组件30可用于充放电，所述电池控制组件40用于控制电芯组件30的充放电，保护电芯组件30。For the above-mentioned cell assembly 30 and battery control assembly 40, as shown in FIG. 11 and FIG. 12 , the cell assembly 30 includes a plurality of stacked cells (not shown), and the battery control assembly 40 is electrically connected to the described battery. The cell assembly 30 can be used for charging and discharging, and the battery control assembly 40 is used for controlling the charging and discharging of the cell assembly 30 to protect the cell assembly 30 .
在一些实施例中，所述电池控制组件40包括电路板401，所述电路板401可用于稳定电池包的电压，保护电池包正常工作，同时，当所述电池包处于放电过程中时，所述电路板401会检测电芯的电压，当电芯电量过低时，停止输出电量，对电芯起到保护作用，当所述电池包处于充电过程中时，在电池充满电时，电路板401可自动断开充电电路避免电芯过充而损坏。In some embodiments, the battery control assembly 40 includes a circuit board 401, and the circuit board 401 can be used to stabilize the voltage of the battery pack and protect the battery pack from working normally. The circuit board 401 will detect the voltage of the battery cell. When the battery cell power is too low, it will stop outputting power to protect the battery cell. When the battery pack is in the charging process, when the battery is fully charged, the circuit board will 401 can automatically disconnect the charging circuit to avoid damage to the battery due to overcharging.
对于上述导热板50，如图11和图12所示，所述导热板50的一表面贴附于所述壳体10的外表面，所述导热板50的另一表面贴附于发热元件，实现对发热元件的散热。可以理解的是：所述导热板50的制作材料可为导热硅胶垫、导热硅脂、导热泥等导热界面材料。For the above-mentioned thermally conductive plate 50, as shown in FIG. 11 and FIG. 12, one surface of the thermally conductive plate 50 is attached to the outer surface of the housing 10, and the other surface of the thermally conductive plate 50 is attached to the heating element, Realize the heat dissipation of the heating element. It can be understood that the material for making the thermally conductive plate 50 may be thermally conductive interface materials such as thermally conductive silicone pads, thermally conductive silicone grease, and thermally conductive mud.
在一些实施例中，所述导热板50的数量为两块，所述两块导热板50分别设置于所述凸台103的两侧，增大导热板50与散热器壳体10的接触面积，提高对发热元件的热传导，有效保护发热元件。In some embodiments, the number of the heat-conducting plates 50 is two, and the two heat-conducting plates 50 are respectively disposed on both sides of the boss 103 to increase the contact area between the heat-conducting plate 50 and the radiator housing 10 , Improve the heat conduction to the heating element and effectively protect the heating element.
在一些实施例中，所述导热板50设置有凹部(未标示)，所述凹部用于所述壳体10上的凸台103插接，可增大导热板50与散热器壳体10的接触面积，提高对发热元件的热传导，有效保护发热元件。In some embodiments, the heat-conducting plate 50 is provided with a concave portion (not shown), and the concave portion is used for plugging the boss 103 on the casing 10 , which can increase the distance between the heat-conducting plate 50 and the radiator casing 10 . Contact area, improve the heat conduction to the heating element, and effectively protect the heating element.
对于上述电池外壳60、第一盖板70和第二盖板80，如图11所示，所述电池外壳60设置有第二收容腔以及连通第二收容腔的第三开口(未标示)，所述第一盖板70盖设于所述电池外壳60的一端，所述第二盖板80盖设于所述电池外壳60的另一端，所述第二收容腔形成封闭的腔室。其中，第二收容腔可用于收容电芯组件、电池控制组件40以及导热板50。电池外壳60可减少电池包的内部部件与外界部件的接触，限制外界灰尘以及降低外界部件造成电池包内部部件短路的几率。For the battery case 60, the first cover plate 70 and the second cover plate 80, as shown in FIG. 11, the battery case 60 is provided with a second accommodating cavity and a third opening (not shown) communicating with the second accommodating cavity, The first cover plate 70 covers one end of the battery case 60 , the second cover plate 80 covers the other end of the battery case 60 , and the second accommodating cavity forms a closed cavity. Wherein, the second accommodating cavity can be used for accommodating the battery cell assembly, the battery control assembly 40 and the heat conducting plate 50 . The battery housing 60 can reduce the contact between the internal components of the battery pack and the external components, limit external dust, and reduce the probability of short circuit of the internal components of the battery pack caused by the external components.
本申请还提供了一种用电设备的实施例，用电设备包括以上的电池包，所述用电设备包括但不限于二轮电动车，储能设备，手持电动工具等，电池包的功能和结构可参阅上述实施例，此处不再一一赘述。The application also provides an embodiment of an electrical device, the electrical device includes the above battery pack, the electrical device includes but is not limited to two-wheeled electric vehicles, energy storage devices, hand-held power tools, etc., the function of the battery pack Reference may be made to the above-mentioned embodiments for the structure and structure, which will not be repeated here.
此外，本申请还提供了相变材料的相变温度和相变焓值为不同数值时的相关试验。具体试验过程如下：In addition, the present application also provides relevant experiments when the phase transition temperature and phase transition enthalpy of the phase change material are different values. The specific test process is as follows:
试验材料：电池包、发热元器件MOS管、多路测温仪、普通齿片散热器、散热器、导热硅胶垫，其中电池包包括电池模组、电池控制组件BMS板以及外壳组件。Test materials: battery pack, heating element MOS tube, multi-channel thermometer, common tooth radiator, radiator, thermal silica pad, wherein the battery pack includes battery module, battery control component BMS board and shell components.
对比例1：对发热元器件MOS管没有采取散热措施。Comparative Example 1: No heat dissipation measures were taken for the MOS tube of the heating element.
对比例2：普通齿片散热器通过螺栓固定在BMS板上且位于两排MOS管上方，齿片散热器通过两条导热硅胶垫与两排MOS管相连，MOS管在充放电过程中产生的热量通过导热硅胶垫导入齿片散热器，利用自然对流原理散失掉。Comparative example 2: The common toothed radiator is fixed on the BMS board by bolts and is located above the two rows of MOS tubes. The toothed radiator is connected to the two rows of MOS tubes through two thermally conductive silicone pads. The MOS tubes are generated during the charging and discharging process. The heat is introduced into the toothed radiator through the thermally conductive silicone pad, and dissipated by the principle of natural convection.
MOS管温升测试方法：将电池包置于25℃恒温箱中，静置1小时使电池包达到恒温，然后电池包以45A恒流充电至总压为83V，之后以83V恒压充电至电流为0.5A；之后将电池包静置2小时，再将电池包以130A恒流放电至总压为60V截止，电池包充放电过程中用多路测温仪全程监控MOS管的温度。MOS tube temperature rise test method: put the battery pack in a 25°C incubator, let it stand for 1 hour to make the battery pack reach a constant temperature, then charge the battery pack with a constant current of 45A to a total voltage of 83V, and then charge it with a constant voltage of 83V to a current After that, let the battery pack stand for 2 hours, and then discharge the battery pack with a constant current of 130A until the total voltage is 60V, and use a multi-channel thermometer to monitor the temperature of the MOS tube during the charging and discharging process of the battery pack.
相变材料是否溢出测试方法：将散热器置于150℃高温箱中，保持120h，之后将散热器从高温箱中取出，观察散热器中的相变材料是否从封装间隙中溢出。Test method for phase change material overflow: place the radiator in a 150°C high temperature box for 120 hours, then take the radiator out of the high temperature box and observe whether the phase change material in the radiator overflows from the package gap.
本申请一实施例A组：散热器通过螺栓固定在BMS板上且位于两排MOS管上方，散热器通过两条导热硅胶垫与两排MOS管相连，MOS管在充放电过程中产生的热量通过导热硅胶垫传导入散热器，同时，散热器通过相变储热吸收大部分热量以及通过自然对流散热原理散失掉一部分热量。散热器的第一壳体的两端通过螺栓与第二壳体和第三壳体连接封装，相变材料灌满中空腔体积的95％，散热器中相变材料的相变焓值固定为200J/g，相变温度分别为50℃、60℃、90℃、130℃、150℃、180℃、190℃。Group A of an embodiment of the present application: the radiator is fixed on the BMS board by bolts and is located above the two rows of MOS tubes. The radiator is connected to the two rows of MOS tubes through two thermally conductive silicone pads. The heat generated by the MOS tubes during the charging and discharging process It is conducted into the radiator through the thermally conductive silicone pad, and at the same time, the radiator absorbs most of the heat through phase change heat storage and dissipates part of the heat through the principle of natural convection heat dissipation. The two ends of the first shell of the radiator are connected to the second shell and the third shell through bolts, and the phase change material fills 95% of the volume of the hollow cavity, and the phase change enthalpy value of the phase change material in the radiator is fixed as 200J/g, and the phase transition temperatures are 50°C, 60°C, 90°C, 130°C, 150°C, 180°C, and 190°C, respectively.
本申请一实施例B组：散热器通过螺栓固定在BMS板上且位于两排MOS管上方，散热器通过两条导热硅胶垫与两排MOS管相连，MOS管在充放电过程中产生的热量通过导热硅胶垫传导入散热器，同时，散热器通过相变储热吸收大部分热量以及通过自然对流散热原理散失掉一部分热量。散热器的第一壳体的两端通过螺栓与第二壳体和第三壳体连接封装，相变材料灌满中空腔体积的95％，设置相变材料的相变温度固定为130℃，相变焓值分别为50J/g、60J/g、80J/g、100J/g、150J/g、250J/g。Group B of an embodiment of the present application: the radiator is fixed on the BMS board by bolts and is located above the two rows of MOS tubes. The radiator is connected to the two rows of MOS tubes through two thermally conductive silicone pads. The heat generated by the MOS tubes during the charging and discharging process It is conducted into the radiator through the thermally conductive silicone pad, and at the same time, the radiator absorbs most of the heat through phase change heat storage and dissipates part of the heat through the principle of natural convection heat dissipation. The two ends of the first shell of the radiator are connected and packaged with the second shell and the third shell through bolts, the phase change material fills 95% of the volume of the hollow cavity, and the phase change temperature of the phase change material is fixed at 130°C. The phase transition enthalpy values are 50J/g, 60J/g, 80J/g, 100J/g, 150J/g, and 250J/g, respectively.
本申请一实施例C组：散热器通过螺栓固定在BMS板上且位于两排MOS管上方，散热器通过两条导热硅胶垫与两排MOS管相连，MOS管在充放电过程中产生的热量通过导热硅胶垫传导入散热器，同时，散热器 通过相变储热吸收大部分热量以及通过自然对流散热原理散失掉一部分热量。散热器的第一壳体的两端通过螺栓与第二壳体和第三壳体连接封装，设置散热器中的相变温度固定为130℃，相变焓值固定为200J/g，使散热器中的相变材料分别灌满中空腔的100％、98％、96％、90％。Group C of an embodiment of the present application: the radiator is fixed on the BMS board by bolts and is located above the two rows of MOS tubes. The radiator is connected to the two rows of MOS tubes through two thermally conductive silicone pads. The heat generated by the MOS tubes during the charging and discharging process It is conducted into the radiator through the thermally conductive silicone pad, and at the same time, the radiator absorbs most of the heat through phase change heat storage and dissipates part of the heat through the principle of natural convection heat dissipation. The two ends of the first shell of the radiator are connected and packaged with the second shell and the third shell through bolts. The phase transition temperature in the radiator is fixed at 130°C, and the phase transition enthalpy value is fixed at 200J/g, so that the heat dissipation can be achieved. The phase change material in the device fills 100%, 98%, 96% and 90% of the hollow cavity respectively.
试验参数以及测试结果如表1所示。The test parameters and test results are shown in Table 1.
表1Table 1
Figure PCTCN2021118322-appb-000001
Figure PCTCN2021118322-appb-000001
由表1的试验结果可知：实施例A组中，相变材料的相变温度为50℃-190℃范围内，和没有采取散热措施的实施例对比，相变材料的相变温度为60℃-180℃范围内时对发热元器件MOS管有明显的散热作用。From the test results in Table 1, it can be seen that in Group A, the phase change temperature of the phase change material is in the range of 50°C to 190°C. Compared with the embodiment without heat dissipation measures, the phase change temperature of the phase change material is 60°C. When the temperature is in the range of -180℃, it has obvious heat dissipation effect on the MOS tube of the heating element.
由实施例A组中的试验数据可知，在相变温度为60℃-180℃区间内，MOS管温度都小于对比例1和例2中的MOS管温度值，说明在此阶段，相变材料吸热较多，散热器的散热效果较明显。其中，在相变温度为90℃-180℃区间内，散热器的散热效果逐渐升高最后趋于良好，在130℃时， 散热器的散热效果最好。同样的，在相变温度为90℃-150℃区间内，散热器的散热效果逐渐升高最后趋于良好，在130℃时，散热器的散热效果最好。此外，在相变温度为130℃-150℃区间内，散热器的散热效果较其他区段散热效果较好。It can be seen from the test data in Example Group A that in the phase transition temperature range of 60°C-180°C, the temperature of the MOS tube is lower than the temperature of the MOS tube in Comparative Examples 1 and 2, indicating that at this stage, the phase change material The heat absorption is more, and the heat dissipation effect of the radiator is more obvious. Among them, in the phase transition temperature range of 90°C-180°C, the heat dissipation effect of the radiator gradually increases and finally tends to be good. At 130°C, the heat dissipation effect of the radiator is the best. Similarly, in the phase transition temperature range of 90°C-150°C, the heat dissipation effect of the radiator gradually increases and finally tends to be good. At 130°C, the heat dissipation effect of the radiator is the best. In addition, in the phase transition temperature range of 130°C-150°C, the heat dissipation effect of the radiator is better than that of other sections.
由实施例B组中的试验数据可知，随着相变材料的相变焓值增加，MOS管温度降幅逐渐增加，同实施例A组中A4相比，随着相变材料的相变焓值的增加，MOS管的降温幅度逐渐增加，说明散热器的散热效果越来越好。其中，在相变焓值为80J/g-150J/g区间内，随着相变材料的相变焓值增加，MOS管温度降幅逐渐增加，说明散热器的散热效果较好，同时在此区段内，MOS管温度降幅与其他区段比，较为明显。It can be seen from the experimental data in Group B of Example that as the phase change enthalpy value of the phase change material increases, the temperature drop of the MOS tube gradually increases. The cooling rate of the MOS tube increases gradually, indicating that the heat dissipation effect of the radiator is getting better and better. Among them, in the range of the phase change enthalpy value of 80J/g-150J/g, as the phase change enthalpy value of the phase change material increases, the temperature drop of the MOS tube gradually increases, indicating that the heat dissipation effect of the radiator is better. In the section, the temperature drop of the MOS tube is more obvious than other sections.
由实施例C组中的试验数据可知，相变材料灌封占据中空腔的体积为90％时，相变材料不易从封装间隙中溢出，且同实施例A组中A4相比可知，相变材料灌封中空腔的比例在90％-95％时，相变材料不易从封装间隙中溢出，此时相变材料可正常进行散热。It can be seen from the test data in Example C group that when the phase change material potting occupies 90% of the volume of the hollow cavity, the phase change material is not easy to overflow from the package gap, and compared with A4 in Example A group, it can be seen that the phase change material When the proportion of the material potting cavity is 90%-95%, the phase change material is not easy to overflow from the package gap, and the phase change material can dissipate heat normally at this time.
散热器的散热效果总体上优于齿片散热器的散热效果，变散热器的散热效果又与相变材料的相变温度和相变焓值相关。实施例B组中B4的散热器散热效果较明显，即相变温度为130℃，相变焓值为250J/g，相变材料灌封中空腔的比例为95％，此时，MOS管降温幅度为45℃，散热器降温效果明显，且无出现相变材料溢出的情况。The heat dissipation effect of the radiator is generally better than that of the toothed radiator, and the heat dissipation effect of the variable heat sink is related to the phase change temperature and phase change enthalpy value of the phase change material. The heat dissipation effect of the heat sink B4 in Example B group is more obvious, that is, the phase transition temperature is 130 ° C, the phase transition enthalpy value is 250 J/g, and the ratio of the phase change material to encapsulate the hollow cavity is 95%. At this time, the MOS tube is cooled down. The amplitude is 45 °C, the cooling effect of the radiator is obvious, and there is no overflow of the phase change material.
以上所述仅为本申请的实施例，并非因此限制本申请的专利范围，凡是利用本申请说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本申请的专利保护范围内。The above are only the embodiments of the present application, and are not intended to limit the scope of the patent of the present application. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present application, or directly or indirectly applied to other related technologies Fields are similarly included within the scope of patent protection of this application.

Claims (10)

  1. 一种散热器，其特征在于，包括：A radiator, characterized by comprising:
    壳体，设置有封闭的中空腔；The shell is provided with a closed hollow cavity;
    相变材料，设置于所述中空腔内，所述相变材料未发生相变时，所述相变材料不超过所述中空腔的体积的95％。The phase change material is arranged in the hollow cavity, and when the phase change material does not undergo a phase change, the phase change material does not exceed 95% of the volume of the hollow cavity.
  2. 根据权利要求1所述的散热器，其特征在于，The heat sink of claim 1, wherein:
    所述相变材料不超过所述中空腔的体积的90％-95％。The phase change material does not exceed 90%-95% of the volume of the hollow cavity.
  3. 根据权利要求1所述的散热器，其特征在于，所述相变材料的相变温度为60摄氏度-180摄氏度。The heat sink according to claim 1, wherein the phase change temperature of the phase change material is 60 degrees Celsius to 180 degrees Celsius.
  4. 根据权利要求1所述的散热器，其特征在于，所述相变材料的相变温度为130摄氏度-150摄氏度。The heat sink according to claim 1, wherein the phase change temperature of the phase change material is 130 degrees Celsius to 150 degrees Celsius.
  5. 根据权利要求1所述的散热器，其特征在于，所述相变材料的相变焓值大于60J/g。The heat sink according to claim 1, wherein the phase change enthalpy value of the phase change material is greater than 60 J/g.
  6. 根据权利要求1-5中任意一项所述的散热器，其特征在于，所述壳体包括第一壳体、第二壳体和第三壳体；The radiator according to any one of claims 1-5, wherein the casing comprises a first casing, a second casing and a third casing;
    所述第二壳体设置于所述第一壳体的第一端，所述第三壳体设置于所述第一壳体的第二端，由所述第一壳体、第二壳体和第三壳体围合形成封闭的中空腔。The second casing is arranged at the first end of the first casing, the third casing is arranged at the second end of the first casing, and the first casing and the second casing are formed by the first casing and the second casing. It is enclosed with the third shell to form a closed hollow cavity.
  7. 根据权利要求1-5中任意一项所述的散热器，其特征在于，The radiator according to any one of claims 1-5, wherein,
    包括封装膜，所述封装膜包覆所述相变材料。An encapsulation film is included, and the encapsulation film encapsulates the phase change material.
  8. 一种电池包，其特征在于，包括：A battery pack, comprising:
    电芯组件，包括多个堆叠设置的电芯；A cell assembly, including a plurality of stacked cells;
    电池控制组件，电连接于所述电芯；及a battery control assembly electrically connected to the battery cell; and
    如权利要求1-7任意一项所述的散热器，所述散热器用于对所述电池控制组件进行散热。The radiator according to any one of claims 1-7, which is used to dissipate heat from the battery control assembly.
  9. 根据权利要求8所述的电池包，其特征在于，The battery pack according to claim 8, wherein,
    所述电池控制组件包括电路板；the battery control assembly includes a circuit board;
    所述电池包还包括导热板，所述导热板的一表面贴附于所述壳体的外表面，所述导热板的另一表面贴附于所述电路板上的发热元件。The battery pack further includes a heat-conducting plate, one surface of the heat-conducting plate is attached to the outer surface of the casing, and the other surface of the heat-conducting plate is attached to the heating element on the circuit board.
  10. 一种用电设备，其特征在于，包括如权利要求8-9任一项所述的电池包。An electrical device, characterized by comprising the battery pack according to any one of claims 8-9.
PCT/CN2021/118322 2021-03-31 2021-09-14 Heat dissipation device, battery pack, and electrical device WO2022205790A1 (en)

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