CN219696550U - Heat conduction member, battery module, battery and electricity utilization device - Google Patents

Abstract

The utility model is suitable for the technical field of batteries, and provides a heat conducting piece, a battery module, a battery and an electric device. The heat conducting piece is provided with a heat conducting part for heat conducting contact with the pole, the heat conducting piece is of a hollow structure, the inner cavity of the heat conducting piece is filled with cooling medium, and the cooling medium is phase change working medium; when the cooling medium is in a cooling state, the volume of the cooling medium is smaller than the volume of the inner cavity of the heat conducting piece; the phase change working medium comprises a liquid-gas phase change material; the phase change point of the liquid-gas phase change material is 30-60 ℃. The heat conducting piece, the battery module, the battery and the power utilization device provided by the utility model can improve the heat dissipation efficiency of the pole to a certain extent.

Description

Heat conduction member, battery module, battery and electricity utilization device

Technical Field

The utility model belongs to the technical field of batteries, and particularly relates to a heat conducting piece, a battery module, a battery and an electric device.

Background

The battery pole in the battery module is easy to accumulate heat, and can not effectively dissipate heat, so that the heat accumulation of the battery module is finally caused, and the normal use of the battery module is further affected.

Disclosure of Invention

In view of the above, the present utility model provides a heat conducting member, a battery module, a battery and an electric device, which aim to improve the heat dissipation efficiency of a pole.

In a first aspect, the utility model provides a heat conducting member, which is provided with a heat conducting part for heat conducting contact with a pole, wherein the heat conducting member is of a hollow structure, a cooling medium is filled in an inner cavity of the heat conducting member, and the cooling medium is a phase change working medium.

The heat conducting piece provided by the utility model is provided with the heat conducting part for heat conducting contact with the polar column, the heat conducting piece is of a hollow structure, and the inner cavity of the heat conducting piece is filled with the phase change working medium as a cooling medium, so that the phase change principle of the phase change working medium is utilized to realize rapid heat dissipation of the contacted substances. When the heat conducting piece provided by the utility model is applied to a battery module, the quick cooling of the pole can be realized, and compared with the heat conducting piece which only adopts solid materials to conduct heat, the heat radiating efficiency of the pole can be improved to a certain extent.

In some embodiments, the volume of the cooling medium is less than the volume of the inner cavity of the thermally conductive member when the cooling medium is in a cooled state. By adopting the scheme, a certain space exists between the cooling medium and the inner wall of the heat conducting piece in a cooling state, and a deformation space reserved for the volume increase possibly occurring after the cooling medium is subjected to phase change is reserved, so that the risk of damage to the heat conducting piece due to the volume increase caused by the phase change of the heat absorption of the cooling medium can be reduced to a certain extent.

In some embodiments, the phase change working fluid comprises a liquid-gas phase change material. The phase change working medium comprises liquid-gas phase change materials, is convenient to obtain materials, can be gasified after absorbing heat, can quickly move to the connecting end of the heat conduction piece and the heat dissipation piece, realizes heat exchange with the heat dissipation piece, and can improve the heat dissipation efficiency of the pole to a certain extent.

In some embodiments, the phase change point of the liquid-vapor phase change material is 30 ℃ to 60 ℃. The phase change point of the liquid-gas phase change material is between 30 ℃ and 60 ℃, so that the liquid-gas phase change material is convenient for phase change when the temperature of the battery is high, and timely takes away heat emitted by the pole, so that the temperature of the pole and the battery is maintained within a normal working temperature range.

In some embodiments, the phase change point of the liquid-vapor phase change material is 40 ℃ to 60 ℃. The phase change point of the liquid-gas phase change material adopts a temperature range of 40-60 ℃, so that the cooling medium can timely take away heat emitted by the pole, the risk of excessive temperature reduction of the pole can be reduced to a certain extent, and the pole and the battery can be in a better working temperature range.

In some embodiments, at least a portion of the thermally conductive portion extends in a circumferential direction of the pole. Compared with the heat conduction part which adopts other setting modes, at least one part of the heat conduction part extends along the circumference of the pole, so that the heat conduction contact area between the heat conduction part and the pole is larger, and the heat dissipation efficiency of the pole can be improved to a certain extent.

In some embodiments, the heat conducting part comprises an annular structure with a first opening, and the heat conducting part is sleeved outside the pole. By adopting the structure provided by the embodiment, the heat conduction contact area between the heat conduction part and the pole is larger, and the heat dissipation efficiency of the pole can be improved to a certain extent.

In some embodiments, the thermally conductive member further comprises: the first connecting part is used for being in heat conduction contact with the heat dissipation piece; and a second connecting portion, a first end of the second connecting portion being in communication with the heat conducting portion, a second end of the second connecting portion being in communication with the first connecting portion; the first connecting part is used for contacting one end of the heat dissipation piece and is provided with a second opening, and the second opening is used for enabling the cooling medium to contact the heat dissipation piece in a temperature rising state. The scheme that the heat conduction piece adopted this embodiment to provide can make the cooling medium direct with the radiating member contact to realize the quick heat exchange of cooling medium and radiating member, can improve the radiating efficiency of utmost point post to a certain extent.

In some embodiments, the first connection portion is disposed obliquely with respect to an extending direction of the second connection portion. Compared with the first connecting part and the second connecting part, the extending directions of the first connecting part and the second connecting part are consistent, the first connecting part is obliquely arranged relative to the extending direction of the second connecting part, and the length of an assembly formed by the first connecting part and the second connecting part can be increased, so that the flowing path of the cooling medium is increased, and the utilization rate of the cooling medium is improved; in the second aspect, the first connecting portion and the heat dissipation element can be obliquely arranged, so that the area of the second opening is larger, the contact area between the cooling medium and the heat dissipation element is larger, and the heat exchange efficiency between the cooling medium and the heat dissipation element can be improved; in the third aspect, compared with the first connection portion, the heat dissipation device is arranged in parallel to the heat dissipation element, by adopting the scheme provided by the embodiment, after heat exchange of the cooling medium is completed, the cooling medium can quickly flow back into the heat conduction portion for continuous use, the circulation period of the cooling medium can be shortened, and the heat dissipation efficiency of the pole can be improved to a certain extent.

In some embodiments, one of the second connection portions and one of the first connection portions are communicated to form one connection assembly, and two of the connection assemblies are respectively communicated with two ends of the heat conducting portion. By adopting the heat conducting piece provided by the embodiment, the cooling medium in the heat conducting part can realize heat exchange with the heat radiating piece through the plurality of connecting components after phase change, and the heat radiating efficiency of the pole can be improved to a certain extent.

In some embodiments, the thermally conductive member is a unitary piece. The heat conducting piece adopts an integral piece, so that the structure of the heat conducting piece is stable, and the heat conducting piece is convenient to assemble.

In a second aspect, the present utility model provides a battery module comprising: the battery unit is provided with a pole at least one end; the heat dissipation piece is in heat conduction contact with at least one surface of the battery cell; and the heat conductive member provided by any one of the above embodiments; the polar column realizes heat exchange with the heat dissipation piece through the heat conduction piece. The battery module provided by the utility model adopts the heat conducting piece provided by any embodiment, and can realize rapid cooling of the pole by utilizing the phase change principle of the phase change working medium, realize heat exchange between the pole and the heat radiating piece, and improve the heat radiating efficiency of the pole to a certain extent.

In some embodiments, the heat sink is in thermally conductive contact with an upper surface of the battery cell. By adopting the scheme provided by the embodiment, when the cooling medium adopts the liquid-gas phase change material, after the phase state is changed from the liquid state to the gas state, the cooling medium can quickly flow to the position of the heat dissipation part, and heat exchange is realized with the heat dissipation part, so that the heat dissipation efficiency of the pole is improved.

In some embodiments, at least a portion of the thermally conductive portion extends in a circumferential direction of the pole, and a length of the portion of the thermally conductive portion extending in the circumferential direction of the pole is greater than or equal to half a circumference of an outer peripheral wall of the pole. By adopting the scheme provided by the embodiment, the heat conduction contact area between the heat conduction part and the pole is larger, so that the heat dissipation efficiency of the pole can be improved to a certain extent.

In a third aspect, the present utility model provides a battery, including a battery module provided in any one of the above embodiments. The battery provided by the utility model adopts the battery module provided by any embodiment, so that the heat dissipation efficiency of the pole can be improved to a certain extent.

In a fourth aspect, the present utility model provides an electric device, which is characterized by comprising a battery provided in any one of the above embodiments, wherein the battery is used for providing electric energy for the electric device. The power utilization device provided by the utility model adopts the battery provided by any embodiment, so that the heat dissipation efficiency of the pole can be improved to a certain extent.

The foregoing description is only an overview of the present utility model, and is intended to be implemented in accordance with the teachings of the present utility model in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present utility model more readily apparent.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the utility model. Also, like reference numerals are used to designate like parts throughout the accompanying drawings. In the drawings:

FIG. 1 is a schematic illustration of a vehicle according to some embodiments of the utility model;

FIG. 2 is a schematic view of an exploded structure of a battery according to some embodiments of the present utility model, not shown with heat sinks;

fig. 3 is a schematic view illustrating a structure of a battery module according to some embodiments of the present utility model;

fig. 4 is a schematic view of a partial structure of a battery module according to some embodiments of the present utility model, in which a heat conductive member is shown as a cross-sectional structure;

fig. 5 is a schematic view illustrating a partial structure of a battery module according to other embodiments of the present utility model, in which a heat conductive member is schematically illustrated in a sectional structure.

Reference numerals in the specific embodiments are as follows:

1000. a vehicle;

100. battery, 200, controller, 300, motor, 400, battery module;

10. the battery comprises a box body 11, a first part 12, a second part 20, battery cells 21 and a pole; 30. heat dissipation member 40, heat conduction member 41, heat conduction portion 42, first connection portion 43, second connection portion 44, second opening 45, first opening 50, cooling medium 60, and insulating layer.

Detailed Description

Embodiments of the technical scheme of the present utility model will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present utility model, and thus are merely examples, and are not intended to limit the scope of the present utility model.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model; the terms "comprising" and "having" and any variations thereof in the description of the utility model and the claims and the description of the drawings above are intended to cover a non-exclusive inclusion.

In the description of embodiments of the present utility model, the technical terms "first," "second," and the like are used merely to distinguish between different objects and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, a particular order or a primary or secondary relationship. In the description of the embodiments of the present utility model, the meaning of "plurality" is two or more unless explicitly defined otherwise.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the utility model. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

In the description of the embodiments of the present utility model, the term "and/or" is merely an association relationship describing an association object, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

In the description of the embodiments of the present utility model, the term "plurality" means two or more (including two), and similarly, "plural sets" means two or more (including two), and "plural sheets" means two or more (including two).

In the description of the embodiments of the present utility model, the orientation or positional relationship indicated by the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of the present utility model.

In the description of the embodiments of the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like should be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; or may be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present utility model will be understood by those of ordinary skill in the art according to specific circumstances.

Currently, the application of power batteries is more widespread from the development of market situation. The power battery is not only applied to energy storage power supply systems such as hydraulic power, firepower, wind power and solar power stations, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles, electric automobiles and the like, and various fields such as aerospace and the like. With the continuous expansion of the application field of the power battery, the market demand of the power battery is also continuously expanding.

The effect of temperature on the cell is not insignificant regardless of the shape. The different temperatures affect the safety, service life, functions, performance and the like of the power battery, and the problems of thermal runaway, serious service life attenuation, charge and discharge limitation and the like of the power battery can occur when the temperature is too high or too low. When the battery is used, heat accumulation at any position of the battery can influence the normal use of the battery. The poles in the battery are easy to accumulate heat and cannot effectively dissipate heat, so that the heat accumulation of the battery easily affects the normal use of the battery.

In order to alleviate this problem, the related art is to provide a solid heat conducting member to conduct the heat emitted from the pole to the cooling system in the battery, and then to take away the heat emitted from the pole through the cooling system in the battery, but such heat dissipation efficiency is poor.

In order to improve the heat dissipation efficiency of the pole, the embodiment of the utility model provides a heat conduction piece. The heat conducting piece is provided with a heat conducting part for heat conducting contact with the pole, the heat conducting piece is of a hollow structure, a cooling medium is filled in the inner cavity of the heat conducting piece, and the cooling medium is a phase change working medium and can be used for heat dissipation of the pole.

When the pole is heated, the cooling medium in the heat conducting member absorbs heat of the pole, the cooling medium is converted from a phase state corresponding to the cooling state to a phase state corresponding to the heating state, so that the pole is rapidly cooled, the cooling medium with heat is conducted to a region with lower temperature by the heat conducting member, heat exchange is realized with the region, the cooling medium is converted from the phase state corresponding to the heating state to the phase state corresponding to the cooling state again, and the cooling medium returns to the initial position along the heat conducting member. The heat conducting piece utilizes the phase change principle of the phase change working medium, can realize rapid cooling of the pole when being applied to the battery module, and has good heat dissipation effect.

The heat conducting piece disclosed by the embodiment of the utility model can be used in a battery module, a battery, and a power utilization device using the battery as a power supply or various energy storage systems using the battery as an energy storage element. The power device may be, but is not limited to, a cell phone, tablet, notebook computer, electric toy, electric tool, battery car, electric car, ship, spacecraft, etc. Among them, the electric toy may include fixed or mobile electric toys, such as game machines, electric car toys, electric ship toys, electric plane toys, and the like, and the spacecraft may include planes, rockets, space planes, and spacecraft, and the like.

For convenience of description, the following embodiment will take an electric device according to an embodiment of the present utility model as an example of the vehicle 1000.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a vehicle 1000 according to some embodiments of the utility model. The vehicle 1000 may be a fuel oil vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or a range-extended vehicle. The battery 100 is provided in the interior of the vehicle 1000, and the battery 100 may be provided at the bottom or the head or the tail of the vehicle 1000. The battery 100 may be used for power supply of the vehicle 1000, for example, the battery 100 may be used as an operating power source of the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, the controller 200 being configured to control the battery 100 to power the motor 300, for example, for operating power requirements during start-up, navigation, and travel of the vehicle 1000.

In some embodiments of the present utility model, battery 100 may not only serve as an operating power source for vehicle 1000, but may also serve as a driving power source for vehicle 1000, instead of or in part instead of fuel oil or natural gas, to provide driving power for vehicle 1000.

Referring to fig. 2, fig. 2 is an exploded view of a battery 100 according to some embodiments of the present utility model. The battery 100 includes a case 10 and a battery module. The battery module is accommodated in the case 10, and the battery module includes at least one battery cell 20. The case 10 is used to provide an accommodating space for the battery cell 20, and the case 10 may have various structures. In some embodiments, the case 10 may include a first portion 11 and a second portion 12, the first portion 11 and the second portion 12 being overlapped with each other, the first portion 11 and the second portion 12 together defining an accommodating space for accommodating the battery cell 20. The second portion 12 may be a hollow structure with one end opened, the first portion 11 may be a plate-shaped structure, and the first portion 11 covers the opening side of the second portion 12, so that the first portion 11 and the second portion 12 together define a containing space; the first portion 11 and the second portion 12 may be hollow structures each having an opening at one side, and the opening side of the first portion 11 is engaged with the opening side of the second portion 12. Of course, the case 10 formed by the first portion 11 and the second portion 12 may be of various shapes, such as a cylinder, a rectangular parallelepiped, or the like. In some cases, the battery cells may also be directly loaded without a case or housing, i.e., without forming a battery pack, with the structure of the vehicle body itself serving as a fixed structure of the battery cells.

In the battery 100, the battery module may be one or more. When a plurality of battery modules are arranged, the plurality of battery modules can be connected in series or in parallel, and the series-parallel connection means that the plurality of battery modules are connected in series or in parallel. The plurality of battery modules can be directly connected in series or in parallel or in series-parallel, and then the whole formed by the plurality of battery modules is accommodated in the box body 10; of course, the battery 100 may be a battery module formed by connecting a plurality of battery modules in series, parallel or series-parallel connection, and the plurality of battery modules are then connected in series, parallel or series-parallel connection to form a whole and are accommodated in the case 10.

In the same battery module, the battery cells 20 may be one or more. When a plurality of battery cells 20 are provided in the same battery module, the plurality of battery cells 20 may be connected in series or in parallel, and the series-parallel connection means that the plurality of battery cells 20 are connected in series or in parallel.

The battery 100 may further include other structures, for example, the battery 100 may further include a bus member for making electrical connection between the plurality of battery cells 20.

Wherein each battery cell 20 may be a secondary battery or a primary battery; but not limited to, lithium sulfur batteries, sodium ion batteries, or magnesium ion batteries. The battery cell 20 may be in the shape of a cylinder, a flat body, a rectangular parallelepiped, or other shapes, etc.

Regardless of the shape and structure of the battery cell, the battery cell 20 is typically provided with a post for electrical connection with other battery cells or external electrical devices.

Referring to fig. 3, a battery module 400 is provided according to an embodiment of the utility model. The battery module 400 includes a battery cell 20, a heat dissipation member 30, and a heat conduction member 40.

At least one end of the battery cell 20 is provided with a post 21. The heat sink 30 is in thermally conductive contact with at least one surface of the battery cell 20. When the temperature of the pole 21 increases, the heat of the pole 21 is transferred to the heat conductive member 40, and heat exchange is achieved between the heat conductive member 40 and the heat dissipation member 30.

The heat dissipation member 30 is typically a water-cooled plate, and may be other heat dissipation structures that can be used for dissipating heat from the battery cells 20, such as a cooling pipe, and the like, and may be specifically set according to the use requirement.

Referring to fig. 4, a heat conducting member 40 is provided in an embodiment of the present utility model. The heat conductive member 40 has a heat conductive portion 41 for thermally conductive contact with the pole 21. The heat conductive member 40 has a hollow structure. The inner cavity of the heat conductive member 40 is filled with a cooling medium 50. The cooling medium 50 is a phase change working medium.

The heat conductive member 40 is a structure having a heat conductive function, such as the heat dissipation member 30, capable of conducting heat emitted from the electrode post 21 to the outside of the battery cell 20 by heat conductive contact.

The heat conduction contact may be direct contact between the heat conduction portion 41 and the pole 21, or may be a certain gap between the heat conduction portion 41 and the pole 21, but the heat emitted by the pole 21 may be conducted to the heat conduction portion 41 by heat radiation, or may be another heat conduction structure may be disposed between the heat conduction portion 41 and the pole 21, and the heat emitted by the pole 21 may be conducted to the heat conduction portion 41 by the heat conduction structure. In any of the above cases, the setting may be specifically performed according to the use requirement.

The heat conduction portion 41 is a portion of the heat conduction member 40 that is capable of receiving heat emitted from the pole 21 and conducting the heat to other portions of the heat conduction member 40.

The hollow structure of the heat conducting member 40 indicates that a cavity is formed in the heat conducting member 40. The cavity may extend through the heat conductive member 40 in the extending direction of the heat conductive member 40, or may be located only in a part of the heat conductive member 40, and may be specifically set according to the use requirement.

It can be understood that the heat conducting part 41 is also hollow when the cavity penetrates the heat conducting member 40 along the extending direction of the heat conducting member 40; when the cavity is located only in a part of the heat conductive member 40, the heat conductive portion 41 may have a hollow structure or a solid structure, and may be provided according to the use requirement.

The cooling medium 50 being a phase change working medium means that the cooling medium 50 is capable of switching between at least two phases upon a temperature change.

For convenience of description, the working principle of the heat conductive member 40 according to the embodiment of the present utility model when applied to the battery module 400 will be described by taking the case that the cooling medium has two phases, that is, a first phase corresponding to the cooling state and a second phase corresponding to the temperature increasing state.

In the initial state, the cooling medium is in a first phase. When the temperature of the pole 21 increases, heat can be conducted to the cooling medium 50 located in the inner cavity of the heat conducting member 40 through the heat conducting portion 41, or conducted to other parts of the heat conducting member 40 through the heat conducting portion 41, and then conducted to the cooling medium 50 through other parts, the cooling medium 50 absorbs heat and changes from the first phase state to the second phase state, so that the pole 21 can be cooled rapidly.

Then, the cooling medium 50 with heat reaches the area of the heat dissipation element 30 along the inner cavity of the heat conduction element 40, the heat dissipation element 30 and the cooling medium 50 realize heat exchange, the temperature of the cooling medium 50 is reduced, the second phase state is converted into the first phase state again, and the cooling medium returns to the initial position along the heat conduction element 40.

The cycle is repeated to realize heat exchange between the heat of the pole 21 and the heat dissipation member 30, thereby realizing adjustment of the temperature of the pole 21.

The heat conducting member 40 provided by the embodiment of the utility model has the heat conducting part 41 for heat conducting contact with the pole 21, and the heat conducting member 40 is of a hollow structure, and the inner cavity of the heat conducting member 40 is filled with the phase change working medium as the cooling medium 50, so that the rapid heat dissipation of the contacted substances is realized by utilizing the phase change principle of the phase change working medium. When the heat conducting member 40 provided by the embodiment of the utility model is applied to the battery module 400, the rapid cooling of the pole 21 can be realized, and compared with the heat conducting member which only adopts solid materials to conduct heat, the heat dissipation efficiency of the pole 21 can be improved to a certain extent.

In some embodiments, the volume of the cooling medium 50 is less than the volume of the inner cavity of the heat conducting member 40 when the cooling medium 50 is in a cooled state.

The cooling medium 50 being in a cooled state refers to a phase state in which the cooling medium 50 is in a lower temperature. If the cooling medium 50 has a first phase state when the temperature is below a first threshold and a second phase state when the temperature is above the first threshold. The cooling medium 50 being in a cooled state means that the cooling medium 50 is in a first phase state.

The volume of the cooling medium 50 being smaller than the volume of the inner cavity of the heat conducting member 40 means that the cooling medium 50 does not fill the inner cavity of the heat conducting member 40, and a certain space exists between the outer contour of the cooling medium 50 and the inner wall of the heat conducting member 40.

By adopting the scheme, a certain space exists between the cooling medium 50 and the inner wall of the heat conducting piece 40 in a cooling state, and a deformation space reserved for the volume increase possibly occurring after the cooling medium 50 is subjected to phase change is reserved, so that the risk of damage to the heat conducting piece 40 due to the volume increase caused by the phase change of the cooling medium 50 caused by heat absorption can be reduced to a certain extent.

In some embodiments, the phase change working fluid comprises a liquid-gas phase change material.

The liquid-gas phase change material can be any one material or a mixture of a plurality of materials of alcohol type, glycerol type, glycol type and the like.

The phase change working medium in this embodiment may include only liquid-gas phase change materials, or may include both liquid-gas phase change materials and other phase change materials, such as liquid-solid phase change materials, solid-gas phase change materials, and the like, which may be specifically selected according to the use requirement.

The liquid-gas phase change material is convenient to obtain materials, and the phase change working medium can be gasified after absorbing heat, and can rapidly move to the connecting end of the heat conduction piece 40 and the heat dissipation piece 30, so that heat exchange with the heat dissipation piece 30 is realized, and the heat dissipation efficiency of the pole 21 can be improved to a certain extent.

In some embodiments, the phase change point of the liquid-vapor phase change material is 30 ℃ to 60 ℃.

The phase change point of the liquid-gas phase change material being 30-60 ℃ means that the phase change point of the liquid-gas phase change material may be any value between 30-60 ℃. The liquid-gas phase change material may change from a liquid phase to a gas phase at temperatures above the phase change point and from a gas phase to a liquid phase at temperatures below the phase change point.

Since battery 100 generally operates normally between-20C and 60C, and the temperature is low when battery 100 is between-20C and 30C, no cooling is required. The phase change point of the liquid-gas phase change material is between 30 ℃ and 60 ℃, so that the liquid-gas phase change material is convenient for phase change when the temperature of the battery 100 is high, and heat emitted by the pole 21 is timely taken away, so that the temperature of the pole 21 and the temperature of the battery 100 are maintained within a normal working temperature range.

In some embodiments, the phase change point of the liquid-vapor phase change material is 40 ℃ to 60 ℃.

Although battery 100 generally works well between-20 and 60 ℃, battery 100 generally performs better than other temperatures when the temperature is between 40 and 60 ℃. The phase change point of the liquid-gas phase change material adopts a temperature range of 40-60 ℃, so that the cooling medium 50 can timely take away heat emitted by the pole 21, the risk of excessive cooling of the pole 21 can be reduced to a certain extent, and the pole 21 and the battery 100 can be in a preferred working temperature range.

In some embodiments, at least a portion of the thermally conductive portion 41 extends in the circumferential direction of the pole 21.

The post 21 is generally cylindrical in configuration. The circumferential direction of the pole 21 is the extending direction of the outer circumference of the pole 21.

At least a portion of the heat conduction portion 41 extends in the circumferential direction of the pole 21, including the following: in the first case, the entirety of the heat conduction portion 41 is arc-shaped and is disposed around the pole 21; in the second case, one part of the heat conduction portion 41 is arc-shaped and disposed around the pole 21, and the other part is other shape, or arc-shaped as well, but the degree of bending is not limited by the shape of the pole 21.

Compared with other arrangement modes of the heat conducting portion 41, at least a part of the heat conducting portion 41 extends along the circumferential direction of the pole 21, so that the heat conducting contact area between the heat conducting portion 41 and the pole 21 is larger, and the heat dissipation efficiency of the pole 21 can be improved to a certain extent.

In some embodiments, as shown in fig. 5, the heat conducting portion 41 includes an annular structure having a first opening 45, and the heat conducting portion 41 is sleeved outside the pole 21.

The annular structure is a structure provided around the pole 21. The first opening 45 is that the ends of the annular structure are not connected, and a certain interval exists between the ends. The size of the interval can be set according to the use requirement.

By adopting the structure provided by the embodiment, the heat conduction contact area between the heat conduction part 41 and the pole 21 is larger, and the heat dissipation efficiency of the pole 21 can be improved to a certain extent.

In some embodiments, as shown in fig. 5, the heat conductive member 40 further includes a first connection portion 42 and a second connection portion 43. The first connection portion 42 is for thermally conductive contact with the heat sink 30. The first end of the second connection portion 43 communicates with the heat conduction portion 41, and the second end of the second connection portion 43 communicates with the first connection portion 42. The first connecting portion 42 is configured to contact the heat dissipating member 30, and has a second opening 44 at an end thereof, where the second opening 44 is configured to allow the cooling medium 50 to contact the heat dissipating member 30 in a temperature-raising state.

The first connection portion 42 and the second connection portion 43 are part of the heat conductive member 40, respectively. When the heat conducting member 40 is formed by a plurality of members, the first connecting portion 42 and the second connecting portion 43 may be one member, a combination of a plurality of members, or one member and the other member.

The first connection portion 42, the second connection portion 43, and the heat conduction portion 41 in this embodiment are hollow structures, respectively.

The second connecting portion 43 has two ends, one of which is a first end and the other of which is a second end. The first end of the second connecting portion 43 is communicated with the heat conducting portion 41, that is, the corresponding ends of the second connecting portion and the heat conducting portion are communicated, so that the inner cavities of the second connecting portion and the heat conducting portion are communicated with each other. The second end of the second connecting portion 43 communicates with the first connecting portion 42, which means that the respective ends of the second connecting portion and the first connecting portion communicate with each other, so as to achieve the mutual communication of the inner cavities of the second connecting portion and the first connecting portion.

The first connection portion 42 has a second opening 44 at one end contacting the heat sink 30, and the second opening 44 is used for the cooling medium 50 to contact the heat sink 30 in a temperature-raising state, which means that the cooling medium 50 can directly contact the heat sink 30 through the second opening 44 in the temperature-raising state, so as to achieve heat conduction between the cooling medium 50 and the heat sink 30.

The heat conducting member 40 adopts the scheme provided in this embodiment, so that the cooling medium 50 can directly contact with the heat dissipating member 30, so as to realize rapid heat exchange between the cooling medium 50 and the heat dissipating member 30, and improve the heat dissipating efficiency of the pole 21 to a certain extent.

In some embodiments, the first connection portion 42 is disposed obliquely with respect to the extending direction of the second connection portion 43.

The first connection portion 42 being disposed obliquely with respect to the extending direction of the second connection portion 43 means that the extending direction of the first connection portion 42 and the extending direction of the second connection portion 43 form an included angle.

Because the distance between the pole 21 and the heat dissipation element 30 is limited during actual use, compared with the fact that the extending directions of the first connection portion 42 and the second connection portion 43 are consistent, the first connection portion 42 is obliquely arranged relative to the extending direction of the second connection portion 43, and the length of an assembly formed by the two connection portions can be increased on the first aspect, so that the flow path of the cooling medium 50 is increased, and the utilization rate of the cooling medium 50 is improved; in the second aspect, the first connection portion 42 and the heat dissipation element 30 may be disposed obliquely, so that the area of the second opening 44 is larger, and thus the contact area between the cooling medium 50 and the heat dissipation element 30 is larger, and the heat exchange efficiency between the cooling medium 50 and the heat dissipation element 30 may be improved; in the third aspect, compared with the first connection portion 42 being disposed parallel to the heat dissipation element 30, by adopting the solution provided in this embodiment, the cooling medium 50 can be quickly returned to the heat conducting portion 41 for continuous use after heat exchange is completed, the cycle period of the cooling medium 50 can be shortened, and the heat dissipation efficiency of the pole 21 can be improved to a certain extent.

In some embodiments, one second connection portion 43 and one first connection portion 42 are communicated to form one connection assembly, and two connection assemblies are provided, and the two connection assemblies are respectively communicated with two ends of the heat conducting portion 41.

By adopting the heat conducting member 40 provided in this embodiment, the cooling medium 50 located in the heat conducting portion 41 can exchange heat with the heat dissipating member 30 through the plurality of connection components after undergoing phase change, so that the heat dissipating efficiency of the pole 21 can be improved to a certain extent.

In some embodiments, the thermally conductive member 40 is a unitary piece.

The heat conducting member 40 is an integral member, which means that the heat conducting member 40 is a member body manufactured through an integral molding process.

The heat conducting member 40 is an integral member, so that the structure is stable and the assembly is convenient.

Referring to fig. 3 to 5, some embodiments of the utility model further provide a battery module 400. The battery module 400 includes the battery cell 20, the heat dissipation member 30, and the heat conduction member 40 according to any of the above embodiments.

At least one end of the battery cell 20 is provided with a post 21. The heat sink 30 is in thermally conductive contact with at least one surface of the battery cell 20. The pole 21 exchanges heat with the heat sink 30 through the heat conductive member 40.

The battery module 400 provided by the embodiment of the utility model adopts the heat conducting piece 40 provided by any embodiment, and can realize rapid cooling of the pole 21 and heat exchange between the pole 21 and the heat radiating piece 30 by utilizing the phase change principle of the phase change working medium, so that the heat radiating efficiency of the pole 21 can be improved to a certain extent.

In some embodiments, the heat sink 30 is in thermally conductive contact with the upper surface of the battery cell 20.

By adopting the scheme provided by the embodiment, when the cooling medium 50 adopts the liquid-gas phase change material, after the phase state is changed from the liquid state to the gas state, the liquid can quickly flow to the position of the heat dissipation part 30, and heat exchange is realized with the heat dissipation part 30, so that the heat dissipation efficiency of the pole 21 is improved.

In some embodiments, referring to fig. 3 to 5, the heat conducting portion 41 is a metal portion, and an insulating layer 60 is disposed between the heat conducting portion 41 and the pole 21. The heat conducting part 41 is a metal part, has good heat conducting effect, and can quickly conduct the heat emitted by the received pole 21 to the cooling medium, thereby improving the heat radiating efficiency. The insulating layer 60 can reduce the risk of electrical connection between the heat conductive member 40 and the pole 21 to a certain extent, and improve the stability of the service performance of the battery module.

In some embodiments, at least a portion of the thermally conductive section 41 extends in the circumferential direction of the pole 21, and the length of the portion of the thermally conductive section 41 extending in the circumferential direction of the pole 21 is greater than or equal to half the circumference of the outer circumferential wall of the pole 21.

The length of the portion of the heat conduction portion 41 extending in the circumferential direction of the pole 21 being greater than or equal to half the circumferential length of the outer circumferential wall of the pole 21 means that when all of the heat conduction portion 41 extends in the circumferential direction of the pole 21, the length of the heat conduction portion 41 is greater than or equal to half the circumferential length of the outer circumferential wall of the pole 21; when only a portion of the heat conduction portion 41 extends in the circumferential direction of the pole 21, the length of the portion is greater than or equal to half the circumference of the outer peripheral wall of the pole 21. The length generally refers to the arc length of the inner side wall of the corresponding portion of the thermal portion 41. The inner side wall is a side wall that guides the heat portion 41 to come close to the pole 21 and make heat conductive contact with the pole 21.

By adopting the scheme provided by the embodiment, the heat conduction contact area between the heat conduction part 41 and the pole 21 is larger, so that the heat dissipation efficiency of the pole 21 can be improved to a certain extent.

Referring to fig. 3 to 5, a battery module 400 is provided according to some embodiments of the present utility model. The battery module 400 includes the battery cell 20, the heat dissipation member 30, and the heat conduction member 40 according to any of the above embodiments. At least one end of the battery cell 20 is provided with a post 21. The heat sink 30 is in heat conductive contact with the upper surface of the battery cell 20. The heat conductive member 40 has a heat conductive portion 41 for heat conductive contact with the pole 21. The heat conductive member 40 has a hollow structure. The inner cavity of the heat conductive member 40 is filled with a cooling medium 50. The cooling medium 50 is a phase change working medium. The heat conduction portion 41 extends in the circumferential direction of the pole 21. In some embodiments, the length of the thermally conductive portion 41 is equal to half the circumference of the outer peripheral wall of the pole 21. In other embodiments, the length of the thermally conductive portion 41 is greater than half the circumference of the outer peripheral wall of the pole 21. In other embodiments, the heat conducting portion 41 is an annular structure with a first opening 45 disposed around the pole 21 and sleeved outside the pole 21.

The heat conductive member 40 further includes a first connection portion 42 and a second connection portion 43. The first connection portion 42 is in heat conductive contact with the heat sink 30. The first end of the second connection portion 43 communicates with the heat conduction portion 41, and the second end of the second connection portion 43 communicates with the first connection portion 42. The pole 21 exchanges heat with the heat sink 30 through the heat conductive member 40. The first connection portion 42 has a second opening 44 at an end contacting the heat sink 30, and the second opening 44 is used for the cooling medium 50 to contact the heat sink 30 in a temperature-raising state. The first connection portion 42 is disposed obliquely with respect to the extending direction of the second connection portion 43.

In some embodiments, one second connection portion 43 and one first connection portion 42 are communicated to form one connection assembly, and two connection assemblies are provided, and the two connection assemblies are respectively communicated with two ends of the heat conducting portion 41.

The heat dissipation piece is a water cooling plate. In the same battery module, each battery monomer is provided with a heat conducting piece, and all the heat conducting pieces are connected with the same layer of water cooling plate.

The cooling medium in this embodiment may be a low boiling point cooling medium such as one or a mixture of alcohol type, glycerin type, glycol type, etc., and the boiling point is 40-60 ℃. When the polar column is heated, the cooling medium of the heat conduction pipe is heated to start boiling and evaporating, the polar column can be cooled rapidly due to the action of evaporation heat absorption, and the steam with heat is transmitted upwards to the inclined end of the heat conduction piece (namely the heat conduction contact end of the first connecting part and the heat dissipation piece) from the heat conduction piece, and the steam is condensed at the end due to the fact that the heat dissipation piece is connected, and then the steam is changed back to liquid to return downwards into the heat conduction part along the heat conduction piece.

Because the battery module 400 provided in this embodiment mainly relies on the back-and-forth gas-liquid conversion of the cooling medium to conduct heat, the heat conducting member may not be a metal heat conducting member, so as to save the weight of the battery pack; of course, a metal heat conducting member, such as a copper heat conducting member with better heat transfer, can be used to better realize heat dissipation.

According to some embodiments of the present utility model, the present utility model further provides a battery, including the battery module provided in any one of the embodiments.

As described above, the battery may be provided with a case in addition to the battery module, and may be specifically set according to the use requirement.

The battery provided by the embodiment of the utility model adopts the battery module provided by any embodiment, so that the heat dissipation efficiency of the pole can be improved to a certain extent.

According to some embodiments of the present utility model, the present utility model further provides an electric device, including the battery provided in any of the above embodiments, where the battery is configured to provide electric energy for the electric device.

As mentioned above, the electric device may be a vehicle, a notebook, etc., and may be specific to the actual situation.

The power utilization device provided by the embodiment of the utility model adopts the battery provided by any embodiment, so that the heat dissipation efficiency of the pole can be improved to a certain extent.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model, and are intended to be included within the scope of the appended claims and description. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present utility model is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims (15)

1. A heat conducting member (40), characterized in that the heat conducting member (40) is provided with a heat conducting part (41) for heat conducting contact with a pole (21), the heat conducting member (40) is of a hollow structure, a cooling medium (50) is filled in an inner cavity of the heat conducting member (40), and the cooling medium (50) is a phase change working medium;

the heat conductive member (40) further includes:

a first connection (42), the first connection (42) being adapted for thermally conductive contact with a heat sink (30); and

a second connection portion (43), a first end of the second connection portion (43) being in communication with the heat conduction portion (41), a second end of the second connection portion (43) being in communication with the first connection portion (42);

the first connecting part (42) is used for contacting with the heat dissipation piece (30), one end of the first connecting part is provided with a second opening (44), and the second opening (44) is used for enabling the cooling medium (50) to contact with the heat dissipation piece (30) in a temperature rising state.

2. The heat conducting member (40) according to claim 1, wherein the volume of the cooling medium (50) is smaller than the volume of the inner cavity of the heat conducting member (40) in the cooled state of the cooling medium (50).

3. The heat transfer member (40) of claim 2, wherein the phase change working substance comprises a liquid-gas phase change material.

4. A heat conducting member (40) according to claim 3, wherein the phase change point of the liquid-gas phase change material is 30-60 ℃.

5. A heat conducting member (40) according to claim 3, wherein the phase change point of the liquid-gas phase change material is 40-60 ℃.

6. The heat conductive member (40) according to any one of claims 1 to 5, wherein at least a portion of the heat conductive portion (41) extends in the circumferential direction of the pole (21).

7. The heat conducting member (40) according to any one of claims 1-5, wherein the heat conducting portion (41) comprises an annular structure having a first opening (45), the heat conducting portion (41) being sleeved outside the pole (21).

8. The heat conductive member (40) according to any one of claims 1 to 5, wherein the first connecting portion (42) is provided obliquely with respect to the extending direction of the second connecting portion (43).

9. The heat conducting member (40) according to any one of claims 1-5, wherein one of said second connection portions (43) and one of said first connection portions (42) communicate to form one connection assembly, said connection assembly being provided with two, two of said connection assemblies communicating with both ends of said heat conducting portion (41), respectively.

10. The thermally conductive member (40) according to any one of claims 1-5, wherein said thermally conductive member (40) is a one-piece member.

11. A battery module (400), characterized by comprising:

a battery unit (20), wherein at least one end of the battery unit (20) is provided with a pole (21);

a heat sink (30), the heat sink (30) being in thermally conductive contact with at least one surface of the battery cell (20); and

the heat conducting member (40) according to any one of claims 1-10;

the pole (21) exchanges heat with the heat sink (30) through the heat conducting member (40).

12. The battery module (400) of claim 11, wherein the heat sink (30) is in thermally conductive contact with an upper surface of the battery cell (20).

13. The battery module (400) according to claim 11 or 12, wherein at least a portion of the heat conduction portion (41) extends in the circumferential direction of the pole (21), and a length of a portion of the heat conduction portion (41) extending in the circumferential direction of the pole (21) is greater than or equal to half of a circumference of an outer peripheral wall of the pole (21).

14. A battery (100) characterized by comprising a battery module (400) according to any one of claims 11-13.

15. An electrical device comprising the battery (100) of claim 14, the battery (100) being configured to provide electrical energy to the electrical device.