CN219696557U - Thermal management system, battery case, battery, and electricity utilization device - Google Patents

Abstract

The embodiment of the utility model provides a thermal management system, a box body of a battery, the battery and an electric device, wherein the thermal management system comprises a heat exchange substrate, a guard plate and a plurality of connecting pieces, the heat exchange substrate comprises a first wall body, a second wall body and a first accommodating cavity positioned between the first wall body and the second wall body, the first accommodating cavity is filled with a first heat exchange medium, the first wall body is used for connecting a battery monomer, and the first heat exchange medium can exchange heat with the battery monomer through the first wall body; the guard plate is positioned on one side of the second wall body, which is away from the first wall body, and is opposite to the second wall body; the plurality of connecting pieces are arranged between the second wall body and the guard plate, and at least one airflow channel is formed by surrounding the guard plate and the second wall body, and the airflow channel is used for heat exchange of the heat exchange substrate. The utility model can improve the reliability of the battery.

Description

Thermal management system, battery case, battery, and electricity utilization device

Technical Field

The present utility model relates to the field of battery technology, and more particularly, to a thermal management system, a case for a battery, and an electric device.

Background

Battery cells are widely used in electronic devices such as cellular phones, notebook computers, battery cars, electric vehicles, electric airplanes, electric ships, electric toy vehicles, electric toy ships, electric toy airplanes, electric tools, and the like.

In the development of battery technology, how to improve the reliability of a battery is one of the research directions in battery technology.

Disclosure of Invention

The utility model provides a thermal management system, a battery box, a battery and an electric device, which can improve the reliability of the battery.

The embodiment of the utility model provides a thermal management system, which comprises a heat exchange substrate, a guard plate and a plurality of connecting pieces, wherein the heat exchange substrate comprises a first wall body, a second wall body and a first accommodating cavity positioned between the first wall body and the second wall body, the first accommodating cavity is filled with a first heat exchange medium, the first wall body is used for connecting a battery monomer, and the first heat exchange medium can exchange heat with the battery monomer through the first wall body; the guard plate is positioned on one side of the second wall body, which is away from the first wall body, and is opposite to the second wall body; the plurality of connecting pieces are arranged between the second wall body and the guard plate, and at least one airflow channel is formed by surrounding the guard plate and the second wall body, and the airflow channel is used for heat exchange of the heat exchange substrate.

In the technical scheme, the heat exchange substrate of the thermal management system can exchange heat for a plurality of battery monomers at the same time, and compared with the scheme that a plurality of water cooling plates arranged at intervals are communicated through pipelines, the heat exchange substrate of the thermal management system reduces the number of pipelines, namely reduces the risk of liquid leakage and improves the reliability of the battery. And form at least one air current passageway that supplies the air current to pass through between heat exchange base plate, backplate and a plurality of connecting piece, the air current in the air current passageway can in time cool down the first heat transfer medium in the heat exchange base plate, has better cooling effect.

In some embodiments, the connector comprises a web.

In the technical scheme, the connecting piece is arranged to be a plate-shaped piece, the plate-shaped piece is lighter in weight and occupies smaller volume, and the volume of the airflow channel can be increased, so that a better ventilation and cooling effect is brought, and the weight of the battery is reduced.

In some embodiments, the second wall and the guard plate are disposed opposite to each other along a first direction, and the plurality of connectors are spaced apart along a second direction and define a plurality of air flow channels with the guard plate and the second wall, the second direction intersecting the first direction.

In the technical scheme, the plurality of connecting pieces, the guard plate and the second wall body are surrounded to form the plurality of air flow channels, the plurality of connecting pieces can play a supporting role on the guard plate and the second wall body, and the occurrence of the condition that the volume of the air flow channels is reduced due to the fact that the heat exchange substrate collapses under the action of gravity of a battery monomer is reduced. And after the plurality of air flow channels are formed by dividing, the volume of each air flow channel is smaller, so that larger wind speed can be generated when air flows through the air flow channels, heat of the first heat exchange medium can be taken away in time, and the cooling effect is better.

In some embodiments, the thermal management system further comprises a support member located in the first accommodating cavity, and opposite ends of the support member are respectively connected to the first wall body and the second wall body.

In the technical scheme, the support piece is arranged to support the first wall body, so that the situation that the first wall body collapses due to the gravity action of the battery monomer is reduced, and the situation that the heat exchange substrate leaks due to the collapse is reduced.

In some embodiments, the support is provided with through holes for the flow of the first heat exchange medium.

In the above technical scheme, when the support piece has great size in first holding the chamber, in order to reduce the influence of support piece to first heat transfer medium fluxion, set up the through-hole on the support piece to increase the fluxion of first heat transfer medium, thereby improve the heat transfer effect to battery monomer.

In some embodiments, the thermal management system further comprises a thermally conductive side plate for heat exchanging against the battery cells, the thermally conductive side plate being connected at an angle to a side of the first wall facing away from the second wall and capable of heat exchanging with the first wall.

In the above technical scheme, set up the heat conduction curb plate, the heat conduction curb plate laminating is in the free side of battery, and heat exchange base plate can be given in heat conduction curb plate absorptive heat, later is taken away by the air current in the air current passageway, realizes the heat transfer to the free side of battery, improves thermal management system and to the free heat transfer effect of battery.

In some embodiments, the number of the heat-conducting side plates is multiple, and the heat-conducting side plates are arranged at intervals and form at least one accommodating space for accommodating the battery cells with the heat exchange substrate.

In the above technical scheme, set up heat conduction curb plate to a plurality ofly, a plurality of heat conduction curb plates enclose with the heat transfer base plate and establish and form at least one accommodation space, so, a plurality of heat conduction curb plates can be simultaneously to battery monomer heat transfer, further improves the effect of heat transfer.

In some embodiments, the second wall and the guard plate are disposed opposite to each other along a first direction, and the plurality of heat-conductive side plates are spaced apart and sequentially opposite to each other along a third direction, the third direction intersecting the first direction.

In the above technical scheme, the plurality of heat conduction side plates are arranged at intervals along the third direction and are arranged oppositely, so that heat exchange can be carried out on two sides of the battery monomer clamped between the two heat conduction side plates, and the heat exchange effect is improved.

In some embodiments, the thermally conductive side plate has a second receiving cavity in communication with the first receiving cavity and filled with the first heat exchange medium.

In the technical scheme, the heat conducting side plate is communicated with the heat exchanging substrate and is filled with the first heat exchanging medium, so that a part of heat absorbed by the heat conducting side plate is directly transferred to the heat exchanging substrate by the wall body of the heat conducting side plate, and a part of heat is absorbed by the first heat exchanging medium in the second accommodating cavity and then is in heat exchange with the first heat exchanging medium in the first accommodating cavity, the heat exchanging efficiency of the heat conducting side plate and the heat exchanging substrate is improved, and the heat exchanging effect of the battery monomer is further improved.

In some embodiments, the first heat exchange medium comprises a phase change material.

In the technical scheme, the first heat exchange medium is arranged to comprise the phase change material, and the phase change material can absorb heat and release heat, can play a role in adjusting the temperature of the battery monomer, and has a good heat exchange effect.

In some embodiments, the thermally conductive side plate has a third receiving cavity filled with a second heat exchange medium capable of heat exchanging with the heat exchange substrate.

In the technical scheme, the third accommodating cavity is formed in the heat conducting side plate and is filled with the second heat exchange medium, a part of heat absorbed by the heat conducting side plate is directly transferred to the heat exchange substrate by the wall body of the heat conducting side plate, and a part of heat is transferred to the heat exchange substrate after being absorbed by the second heat exchange medium in the third accommodating cavity, so that the heat exchange efficiency of the heat conducting side plate and the heat exchange substrate is improved, and the heat exchange effect is further improved.

In some embodiments, the first heat exchange medium comprises a heat exchange fluid and the second heat exchange medium comprises a phase change material.

In the technical scheme, the first heat exchange medium is set as the heat exchange fluid, and the second heat exchange medium is set as the phase change material, so that the temperature change of the heat exchange fluid is more obvious, heat can be dissipated more quickly, and the heat exchange effect is improved. The second heat exchange medium can absorb heat or release heat, and has good temperature regulation effect. Therefore, a part of heat generated by the battery monomer is transferred to the first heat exchange medium by the wall body of the heat conduction side plate and then is quickly taken away by the air flow, and the other part of the heat is absorbed by the second heat exchange medium, and meanwhile, the first heat exchange medium with obvious temperature change exchanges heat with the second heat exchange medium, so that the heat exchange effect is further improved.

In some embodiments, the thermal management system further comprises a power mechanism in communication with the first receiving chamber and a heat exchanger for exchanging heat with the first heat exchange medium, the power mechanism powering the first heat exchange medium into the heat exchanger.

In the technical scheme, the power mechanism and the heat exchanger are arranged, and the heat exchanger is used for exchanging heat with the first heat exchange medium, so that the first heat exchange medium can be cooled through the airflow channel and is cooled through the heat exchanger, and the heat exchange effect is high.

In a second aspect, an embodiment of the present utility model provides a battery case, including the above thermal management system and a plurality of side walls, where the plurality of side walls are connected to a heat exchange substrate, and form an accommodating space with the heat exchange substrate for accommodating a battery monomer.

In a third aspect, an embodiment of the present utility model provides a battery, including a battery unit, and the thermal management system or the battery case, where the first wall body carries the battery unit.

In a fourth aspect, an embodiment of the present utility model further provides an electrical device, including the above battery, where the battery is used to provide electrical energy.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments of the present utility model will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present utility model, and other drawings may be obtained according to the drawings without inventive effort for a person skilled in the art.

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

fig. 2 is a schematic structural diagram of a battery according to some embodiments of the present utility model;

fig. 3 is a schematic structural diagram of a case of a battery according to some embodiments of the present utility model;

fig. 4 is a schematic view of a partial structure of a case of a battery according to some embodiments of the present utility model;

FIG. 5 is a cross-sectional view of a battery provided in some embodiments of the utility model;

FIG. 6 is an enlarged view at A in FIG. 5;

fig. 7 is another cross-sectional view of a battery provided in some embodiments of the utility model;

FIG. 8 is an enlarged view at B in FIG. 7;

fig. 9 is a further cross-sectional view of a battery provided in some embodiments of the utility model;

fig. 10 is an enlarged view of fig. 9 at C;

fig. 11 is a schematic structural diagram of a thermal management system according to an embodiment of the present utility model.

Reference numerals of the specific embodiments are as follows:

1. a vehicle; 2. a battery; 3. a controller; 4. a motor; 5. a battery cell;

6. a case; 61. a sidewall;

7. a thermal management system;

71. a heat exchange substrate; 711. a first wall; 712. a second wall; 713. a first accommodation chamber; 714. a first heat exchange medium; 715. a support; 716. a through hole;

72. a guard board;

73. a connecting piece;

74. an air flow channel;

75. a thermally conductive side plate; 751. a second accommodation chamber; 752. a third accommodation chamber; 753. a second heat exchange medium;

76. an accommodating space;

77. a power mechanism;

78. a heat exchanger;

x, a first direction; y, second direction; z, third direction.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the 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 in the description of the application 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. The terms first, second and the like in the description and in the claims or in the above-described figures, are used for distinguishing between different objects and not necessarily for describing a particular sequential or chronological order.

Reference in the specification 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.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "attached" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

The term "and/or" in the present utility model is merely an association relation describing the association object, and indicates that three kinds of relations may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In the present utility model, the character "/" generally indicates that the front and rear related objects are an or relationship.

In the embodiments of the present utility model, the same reference numerals denote the same components, and detailed descriptions of the same components are omitted in different embodiments for the sake of brevity. It should be understood that the thickness, length, width, etc. dimensions of the various components in the embodiments of the utility model shown in the drawings, as well as the overall thickness, length, width, etc. dimensions of the integrated device, are merely illustrative and should not be construed as limiting the utility model in any way.

The term "plurality" as used herein refers to two or more (including two).

In the present utility model, the battery cells may include a lithium ion secondary battery cell, a lithium ion primary battery cell, a lithium sulfur battery cell, a sodium lithium ion battery cell, a sodium ion battery cell, or a magnesium ion battery cell, which is not limited in the embodiment of the present utility model. The battery cell may be in a cylindrical shape, a flat shape, a rectangular parallelepiped shape, or other shapes, which is not limited in this embodiment of the utility model.

Reference to a battery in accordance with an embodiment of the present utility model refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery referred to in the present utility model may include a battery module or a battery pack, or the like. The battery generally includes a case for enclosing one or more battery cells. The case body can prevent liquid or other foreign matters from affecting the charge or discharge of the battery cells.

The battery cell comprises an electrode assembly and electrolyte, wherein the electrode assembly comprises a positive electrode plate, a negative electrode plate and a separator. The battery cell mainly relies on metal ions to move between the positive pole piece and the negative pole piece to work. The positive electrode plate comprises a positive electrode current collector and a positive electrode active material layer, and the positive electrode active material layer is coated on the surface of the positive electrode current collector; the positive electrode current collector comprises a positive electrode coating area and a positive electrode lug connected to the positive electrode coating area, wherein the positive electrode coating area is coated with a positive electrode active material layer, and the positive electrode lug is not coated with the positive electrode active material layer. Taking a lithium ion battery monomer as an example, the material of the positive electrode current collector can be aluminum, the positive electrode active material layer comprises a positive electrode active material, and the positive electrode active material can be lithium cobaltate, lithium iron phosphate, ternary lithium or lithium manganate and the like. The negative electrode plate comprises a negative electrode current collector and a negative electrode active material layer, and the negative electrode active material layer is coated on the surface of the negative electrode current collector; the negative electrode current collector comprises a negative electrode coating area and a negative electrode tab connected to the negative electrode coating area, wherein the negative electrode coating area is coated with a negative electrode active material layer, and the negative electrode tab is not coated with the negative electrode active material layer. The material of the anode current collector may be copper, the anode active material layer includes an anode active material, and the anode active material may be carbon or silicon, or the like. The material of the separator may be PP (polypropylene) or PE (polyethylene), etc.

The battery cell further includes a case inside which a receiving chamber for receiving the electrode assembly is formed. The case may protect the electrode assembly from the outside to prevent foreign substances from affecting the charge or discharge of the electrode assembly.

The battery can exhibit different electrical cycle performance at different ambient temperatures, and when the ambient temperature is too high or too low, the cycle performance of the battery can be reduced, even causing a reduction in the service life thereof. In order to make the new energy automobile run safely, stably and excellently, effective heat management is generally required for the battery, and the battery is controlled to operate in a proper temperature range.

In the related art, a thermal management system is generally disposed in a battery, and the thermal management system can be used for exchanging heat with a battery cell of the battery to effectively perform thermal management on the battery, so that the battery cell works in a proper temperature range.

The thermal management system generally includes a plurality of water-cooled plates disposed at intervals, and the battery cells are sandwiched between two adjacent water-cooled plates, so as to exchange heat between two sides of the battery cells. The adjacent water cooling plates are in flexible connection through pipelines, so that the communication of the adjacent water cooling plates is realized.

Because two adjacent water cooling plates are in flexible connection through a pipeline, the heat management system has more joints, so that the risk of liquid leakage is high, and the battery monomer is easy to be damaged.

In view of this, the present utility model provides a thermal management system, which connects a plurality of battery units through a first wall of a heat exchange substrate at the same time, so as to exchange heat for the plurality of battery units, thereby reducing the risk of leakage compared with a pipeline connection mode and improving the reliability of the battery. And form at least one air current passageway between heat exchange base plate, backplate and a plurality of connecting piece, the air current passageway is used for supplying the air current to pass, and the air current can take away the heat of first heat transfer medium in time, has better cooling effect.

The thermal management system described in the embodiments of the present utility model is applicable to a battery and an electric device using the thermal management system.

The electric device may be a vehicle, a mobile phone, a portable device, a notebook computer, a ship, a spacecraft, an electric toy, an electric tool, or the like. The vehicle can be a fuel oil vehicle, a fuel gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle or a range-extended vehicle; spacecraft including airplanes, rockets, space planes, spacecraft, and the like; the electric toy includes fixed or mobile electric toys, such as a game machine, an electric car toy, an electric ship toy, and an electric airplane toy; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railroad power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete shakers, and electric planers, among others. The embodiment of the utility model does not limit the electric device in particular.

For convenience of explanation, the following examples will be described taking an electric device as an example of a vehicle.

Fig. 1 is a schematic structural diagram of a vehicle according to some embodiments of the present utility model.

As shown in fig. 1, the interior of the vehicle 1 is provided with a battery 2, and the battery 2 may be provided at the bottom or at the head or at the tail of the vehicle 1. The battery 2 may be used for power supply of the vehicle 1, for example, the battery 2 may serve as an operating power source of the vehicle 1.

The vehicle 1 may further comprise a controller 3 and a motor 4, the controller 3 being arranged to control the battery 2 to power the motor 4, for example for operating power requirements during start-up, navigation and driving of the vehicle 1.

In some embodiments of the utility model, the battery 2 may not only serve as an operating power source for the vehicle 1, but also as a driving power source for the vehicle 1, instead of or in part instead of fuel oil or natural gas, to provide driving power for the vehicle 1.

Fig. 2 is a schematic structural diagram of a battery according to some embodiments of the present utility model.

As shown in fig. 2, the present utility model further provides a battery 2, which includes a battery cell 5 and a thermal management system 7, wherein the thermal management system 7 is used for adjusting the temperature of the battery cell 5.

In the battery 2, the number of the battery cells 5 may be one or more. If there are multiple battery cells 5, the multiple battery cells 5 may be connected in series or parallel or a series-parallel connection, where a series-parallel connection refers to that the multiple battery cells 5 are connected in series or parallel. The plurality of battery cells 5 can be directly connected in series or in parallel or in series-parallel, and then the whole formed by the plurality of battery cells 5 is fixed on the bearing part; of course, a plurality of battery cells 5 may be connected in series or parallel or series-parallel to form a battery module, and then connected in series or parallel or series-parallel to form a whole and fixed on the bearing member.

Fig. 3 is a schematic structural diagram of a case according to some embodiments of the present utility model, and fig. 4 is a schematic partial structural diagram of a case of a battery according to some embodiments of the present utility model.

As shown in fig. 3 and 4, the present utility model further provides a case 6, which includes a thermal management system 7 and a plurality of side walls 61, wherein the plurality of side walls 61 are connected to the thermal management system 7 and form an accommodating space for accommodating the battery cells 5 with the thermal management system 7.

Fig. 5 is a cross-sectional view of a battery according to some embodiments of the present utility model, fig. 6 is an enlarged view of fig. 5 at a, and fig. 7 is another cross-sectional view of a battery according to some embodiments of the present utility model; fig. 8 is an enlarged view at B in fig. 7.

As shown in fig. 5 to 8, the present utility model further provides a thermal management system 7, including a heat exchange substrate 71, a protection plate 72, and a plurality of connectors 73, where the heat exchange substrate 71 includes a first wall body 711, a second wall body 712, and a first accommodating cavity 713 between the first wall body 711 and the second wall body 712, the first accommodating cavity 713 is filled with a first heat exchange medium 714, the first wall body 711 is used for connecting the battery cells 5, and the first heat exchange medium 714 can exchange heat with the battery cells 5 through the first wall body 711. The guard plate 72 is located on a side of the second wall 712 facing away from the first wall 711 and is disposed opposite the second wall 712. The plurality of connectors 73 are disposed between the second wall 712 and the guard plate 72, and enclose at least one air flow channel 74 with the guard plate 72 and the second wall 712, and the air flow channel 74 is used for heat exchange with the heat exchange substrate 71.

The first wall body 711 of the embodiment of the present utility model is used for heat exchanging the plurality of battery cells 5. Alternatively, the battery cell 5 includes a top surface and a bottom surface opposite to each other, the top surface is provided with a pole, and the first wall 711 is connected to the bottom surface of the battery cell 5.

The first wall 711 and the second wall 712 of the embodiment of the present utility model are disposed opposite to each other, and may be parallel to each other or disposed obliquely to each other.

The first heat exchange medium 714 of the present embodiment may be a phase change material or a heat exchange liquid. The heat exchange liquid can be water, mineral oil or glycol, and the phase change material can be paraffin wax.

The guard plate 72 and the second wall 712 of the embodiment of the present utility model are disposed opposite to each other, and may be parallel to each other or disposed obliquely to each other.

The connecting member 73, the guard plate 72 and the second wall 712 of the embodiment of the present utility model may enclose an air flow passage 74 having a rectangular cross section, an air flow passage 74 having a trapezoidal cross section, or an air flow passage 74 having another cross section.

The connector 73 of the present embodiment may be a plate, block or other shape. When the second wall 712 and the guard plate 72 are parallel to each other, the connecting member 73 may be disposed vertically between the second wall 712 and the guard plate 72, or may be disposed obliquely between the second wall 712 and the guard plate 72.

Optionally, one of the connectors 73 is connected to the same side end of the second wall 712 and the guard plate 72. Further alternatively, two connecting members 73 of the plurality of connecting members 73 are respectively disposed at opposite ends of the second wall 712 and connected to corresponding ends of the guard plate 72.

The plurality of connecting members 73 of the present utility model may be disposed at intervals from each other or may be disposed in a bonded manner on the premise of surrounding at least one air flow passage 74.

The shape of the plurality of connection members 73 may be the same or different in the embodiment of the present utility model. The shape of the plurality of air flow passages 74 of the present embodiment may be the same or different.

Compared with the scheme that a plurality of water cooling plates arranged at intervals are communicated through pipelines, the heat exchange substrate 71 of the heat management system 7 can exchange heat for a plurality of battery monomers 5 at the same time, so that the number of pipelines is reduced, namely, the risk of liquid leakage is reduced, and the reliability of the battery 2 is improved. And, form at least one air current passageway 74 that supplies the air current to pass through between heat exchange base plate 71, backplate 72 and a plurality of connecting piece 73, the air current in air current passageway 74 can in time cool down to the first heat transfer medium 714 in the heat exchange base plate 71, has better cooling effect.

In some embodiments, the connector 73 comprises a web.

The connecting member 73 is provided as a plate-like member which is light in weight and occupies a small volume, and can increase the volume of the air flow passage 74, thereby bringing about a better ventilation and cooling effect and reducing the weight of the battery 2.

In some embodiments, the second wall 712 and the guard plate 72 are disposed opposite to each other along the first direction X, and the plurality of connectors 73 are spaced apart along the second direction Y, and define a plurality of air flow channels 74 with the guard plate 72 and the second wall 712, where the second direction Y intersects the first direction X.

The second wall 712 and the guard plate 72 of the embodiment of the present utility model are disposed opposite to each other along the first direction X, and may be parallel to each other or disposed obliquely to each other. Optionally, the second wall 712 and the guard plate 72 are disposed in parallel and perpendicular to the first direction X.

Alternatively, the first direction X is perpendicular to the second direction Y.

Alternatively, the connection member 73 is a connection plate, and a plurality of connection plates are parallel to each other. Further alternatively, the two ends of the connection plate are perpendicular to the guard plate 72 and the second wall 712, respectively.

The plurality of connecting pieces 73, the guard plate 72 and the second wall body 712 enclose to form a plurality of air flow channels 74, and the plurality of connecting pieces 73 can play a supporting role on the guard plate 72 and the second wall body 712, so that the occurrence of the condition that the volume of the air flow channels 74 is reduced due to the fact that the heat exchange substrate 71 collapses due to the gravity action of the battery cells 5 is reduced. And after the plurality of air flow channels 74 are formed in a splitting mode, the volume of each air flow channel 74 is smaller, so that larger wind speed can be generated when air flows through the air flow channels 74, heat of the first heat exchange medium 714 can be taken away in time, and the cooling effect is better.

In some embodiments, the thermal management system 7 further includes a support member 715, where the support member 715 is located in the first accommodating chamber 713, and opposite ends of the support member 715 are connected to the first wall 711 and the second wall 712, respectively.

The support 715 of embodiments of the present utility model may be a plate, column, or other shaped structure.

The support 715 according to an embodiment of the present utility model may be a plurality of support 715, and the plurality of support 715 are arranged in the first accommodating chamber 713 in a scattered or arrayed manner. Alternatively, the number of the supporting members 715 is plural, and the plurality of supporting members 715 are arranged at intervals in one direction.

The support 715 is provided to support the first wall 711, so that the first wall 711 is reduced from collapsing due to the gravity of the battery cell 5, and leakage of the heat exchange substrate 71 due to collapsing is reduced.

In some embodiments, the support 715 is provided with through holes 716 for the flow of the first heat exchange medium 714.

Optionally, the number of the through holes 716 is plural, and the plural through holes 716 are arranged at intervals.

When the support member 715 has a larger size in the first accommodating chamber 713, in order to reduce the influence of the support member 715 on the flow-through of the first heat exchange medium 714, the support member 715 is provided with a through hole 716 to increase the flow-through of the first heat exchange medium 714, thereby improving the heat exchange effect on the battery cells 5.

In some embodiments, the thermal management system 7 further comprises a thermally conductive side plate 75, the thermally conductive side plate 75 being configured to exchange heat with the battery cells 5, the thermally conductive side plate 75 being connected to a side of the first wall 711 facing away from the second wall 712 at an angle and being capable of exchanging heat with the first wall 711.

The heat conductive side plate 75 of the embodiment of the present utility model may be connected to the first wall 711 at an acute angle, a right angle, or an obtuse angle. Alternatively, the heat conductive side plate 75 is disposed perpendicular to the first wall body 711.

The heat-conducting side plate 75 of the embodiment of the present utility model is made of a heat-conducting material, for example, a metal material may be selected. Further alternatively, the metal material is selected from aluminum material or silver material.

In use, the thermally conductive side plate 75 of the present embodiment is capable of engaging the side of the battery cell 5 to exchange heat with the battery cell 5.

The heat conducting side plate 75 according to the embodiment of the present utility model may be integrally connected with the heat exchanging substrate 71 by means of welding or the like.

The heat conduction side plate 75 is arranged, the heat conduction side plate 75 is attached to the side face of the battery monomer 5, heat absorbed by the heat conduction side plate 75 can be transferred to the heat exchange substrate 71 and then taken away by air flow in the air flow channel 74, heat exchange of the side face of the battery monomer 5 is achieved, and the heat exchange effect of the heat management system 7 on the battery monomer 5 is improved.

In some embodiments, the number of the heat-conducting side plates 75 is plural, and the plural heat-conducting side plates 75 are disposed at intervals and form at least one accommodating space 76 for accommodating the battery cells 5 with the heat exchange substrate 71.

Optionally, a plurality of heat conducting side plates 75 and the heat exchange substrate 71 enclose a plurality of accommodating spaces 76.

The plurality of heat conduction side plates 75 are arranged, and the plurality of heat conduction side plates 75 and the heat exchange substrate 71 are surrounded to form at least one accommodating space 76, so that the plurality of heat conduction side plates 75 can exchange heat to the battery cells 5 at the same time, and the heat exchange effect is further improved.

In some embodiments, the second wall 712 and the guard 72 are disposed opposite to each other along the first direction X, and the plurality of thermally conductive side plates 75 are spaced apart and sequentially opposite to each other along a third direction Z intersecting the first direction X.

Illustratively, a plurality of thermally conductive side plates 75 are each disposed in parallel.

The third direction Z of the embodiment of the present utility model may be parallel to the second direction Y or may intersect with the second direction Y.

The plurality of heat conducting side plates 75 are arranged at intervals in sequence along the third direction Z and are arranged oppositely, so that heat exchange can be carried out on two sides of the battery cell 5 clamped between the two heat conducting side plates 75, and the heat exchange effect is improved.

Fig. 9 is a further cross-sectional view of a battery provided in some embodiments of the utility model; fig. 10 is an enlarged view at C in fig. 9.

Referring to fig. 9 and 10, in some embodiments, the thermally conductive side plate 75 has a second receiving cavity 751, the second receiving cavity 751 being in communication with the first receiving cavity 713 and being filled with the first heat exchange medium 714.

The second accommodation chamber 751 and the first accommodation chamber 713 of the embodiment of the utility model communicate and are filled with the same first heat exchange medium 714.

The heat conducting side plate 75 is communicated with the heat exchanging substrate 71 and is filled with the first heat exchanging medium 714, so that a part of heat absorbed by the heat conducting side plate 75 is directly transferred to the heat exchanging substrate 71 by the wall body of the heat conducting side plate 75, and a part of heat is absorbed by the first heat exchanging medium 714 in the second accommodating cavity 751 and then is in heat exchange with the first heat exchanging medium 714 in the first accommodating cavity 713, thereby improving the heat exchanging efficiency of the heat conducting side plate 75 and the heat exchanging substrate 71 and further improving the heat exchanging effect on the battery cells 5.

In some embodiments, the first heat exchange medium 714 comprises a phase change material.

The phase change material of the embodiment of the utility model can be graphene phase change material, paraffin, carbon nano tube phase change material or other phase change materials.

The first heat exchange medium 714 is arranged to comprise a phase change material, and the phase change material can absorb heat and release heat, so that the temperature of the battery cell 5 can be regulated, and a good heat exchange effect is achieved.

Referring to fig. 5-8, in some embodiments, the heat-conducting side plate 75 has a third receiving cavity 752, the third receiving cavity 752 being filled with a second heat exchange medium 753, the second heat exchange medium 753 being capable of heat exchanging with the heat exchange substrate 71.

The third accommodation chamber 752 of the embodiment of the present utility model is provided independently from the first accommodation chamber 713 without communication.

The second heat exchange medium 753 in the embodiment of the present utility model may be a phase change material, or may be a heat exchange liquid, such as water or mineral oil.

The third accommodating cavity 752 is arranged in the heat conducting side plate 75 and is filled with the second heat exchange medium 753, a part of heat absorbed by the heat conducting side plate 75 is directly transferred to the heat exchange substrate 71 by the wall body of the heat conducting side plate 75, and a part of heat absorbed by the second heat exchange medium 753 in the third accommodating cavity 752 is transferred to the heat exchange substrate 71, so that the heat exchange efficiency of the heat conducting side plate 75 and the heat exchange substrate 71 is improved, and the heat exchange effect is further improved.

In some embodiments, the first heat exchange medium 714 comprises a heat exchange fluid and the second heat exchange medium 753 comprises a phase change material.

The heat exchange fluid in the embodiment of the utility model can be heat exchange liquid, such as water, mineral oil or glycol, or can be heat exchange fluid mixed with solid and liquid, such as nanofluid prepared by dispersing nano powder in liquid, such as CuO/water nanofluid.

The phase change material of the embodiment of the utility model can be graphene phase change material, paraffin, carbon nano tube phase change material or other phase change materials.

The first heat exchange medium 714 is set as heat exchange fluid, and the second heat exchange medium 753 is set as phase change material, so that the temperature change of the heat exchange fluid is more obvious, heat can be dissipated more quickly, and the heat exchange effect is improved. The second heat exchange medium 753 can absorb heat or release heat, and has good temperature regulation effect. Therefore, a part of the heat generated by the battery cell 5 is transferred to the first heat exchange medium 714 by the wall body of the heat conduction side plate 75 and then is quickly taken away by the airflow, and a part of the heat is absorbed by the second heat exchange medium 753, and meanwhile, the first heat exchange medium 714 with obvious temperature change exchanges heat with the second heat exchange medium 753, so that the heat exchange effect is further improved.

Fig. 11 is a schematic structural diagram of a thermal management system according to an embodiment of the present utility model.

Referring to fig. 11, in some embodiments, the thermal management system 7 further includes a power mechanism 77 and a heat exchanger 78, where the power mechanism 77, the heat exchanger 78 and the first receiving chamber 713 are in communication, the heat exchanger 78 is configured to exchange heat with the first heat exchange medium 714, and the power mechanism 77 is configured to power the first heat exchange medium 714 into the heat exchanger 78.

The heat exchanger 78 according to the embodiment of the present utility model may be an air-cooled heat exchanger 78, such as a fin structure, which takes heat away by an air flow generated during the running of the vehicle 1. The heat exchanger 78 may also be a temperature control system of the vehicle 1, by means of which the temperature of the first heat exchange medium 714 is regulated. For example, by absorbing heat from first heat exchange medium 714 with an evaporator in a temperature control system, or by increasing the temperature of first heat exchange medium 714 with a condenser.

The power mechanism 77 of embodiments of the present utility model may be a circulation pump, a hydraulic device, or other structure.

In particular use, the heat exchanger 78 may be provided at the front end of the vehicle 1 to cool down by airflow.

The power mechanism 77 and the heat exchanger 78 are arranged, and the heat exchanger 78 is utilized to exchange heat for the first heat exchange medium 714, so that the first heat exchange medium 714 can be cooled through the airflow channel 74, and meanwhile, the heat exchange effect is high.

The embodiment of the utility model also provides a case 6 of the battery 2, which comprises the thermal management system 7 and a plurality of side walls 61, wherein the side walls 61 are connected to the heat exchange substrate 71, and form an accommodating space for accommodating the battery cells 5 with the heat exchange substrate 71.

Alternatively, the number of the heat exchange side walls 61 is four, and the four heat exchange side walls 61 and the heat exchange substrate 71 enclose a rectangular parallelepiped accommodating space.

Illustratively, when the thermal management system 7 includes thermally conductive side plates 75, both ends of the thermally conductive side plates 75 are respectively connected to the two side walls 61.

The embodiment of the utility model further provides a battery 2, which comprises a battery cell 5, the thermal management system 7 or the box 6 of the battery 2, and the first wall 711 carries the battery cell 5.

Illustratively, the first wall 711 is attached to the bottom surface of the battery cell 5. The two can be connected in an adhesive manner.

The embodiment of the utility model also provides an electric device, which comprises the battery 2, wherein the battery 2 is used for providing electric energy.

Referring to fig. 3-8, an embodiment of the present utility model provides a thermal management system 7, which includes a heat exchange substrate 71, a protection board 72 and a plurality of connectors 73, wherein the heat exchange substrate 71 includes a first wall body 711, a second wall body 712 and a first accommodating cavity 713 between the first wall body 711 and the second wall body 712, the first accommodating cavity 713 is filled with a first heat exchange medium 714, the first wall body 711 is used for connecting with a battery cell 5, and the first heat exchange medium 714 can exchange heat with the battery cell 5 through the first wall body 711. The guard plate 72 is located on a side of the second wall 712 facing away from the first wall 711 and is disposed opposite the second wall 712. The plurality of connectors 73 are disposed between the second wall 712 and the guard plate 72, and enclose at least one air flow channel 74 with the guard plate 72 and the second wall 712, and the air flow channel 74 is used for heat exchange with the heat exchange substrate 71. The second wall 712 and the guard plate 72 are disposed opposite to each other along the first direction X, and the plurality of connecting members 73 are arranged at intervals along the second direction Y, and form a plurality of air flow passages 74 around the guard plate 72 and the second wall 712, wherein the second direction Y intersects the first direction X. The thermal management system 7 further includes a support member 715, where the support member 715 is located in the first accommodating cavity 713, and opposite ends of the support member 715 are respectively connected to the first wall 711 and the second wall 712.

The thermal management system 7 further comprises a heat conducting side plate 75, wherein the heat conducting side plate 75 is used for exchanging heat with the battery cells 5, and the heat conducting side plate 75 is connected to one side of the first wall body 711, which faces away from the second wall body 712, in an angle manner, and can exchange heat with the first wall body 711. The number of the heat-conducting side plates 75 is plural, the second wall body 712 and the guard plate 72 are oppositely arranged along the first direction X, the plurality of heat-conducting side plates 75 are arranged at intervals along the third direction Z and are sequentially opposite, and the third direction Z intersects the first direction X. The heat-conducting side plate 75 has a third receiving chamber 752, the third receiving chamber 752 being filled with a second heat exchange medium 753, the second heat exchange medium 753 being capable of heat exchanging with the heat exchange substrate 71. The first heat exchange medium 714 comprises a heat exchange fluid and the second heat exchange medium 753 comprises a phase change material.

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; 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 solutions described in the foregoing embodiments may be modified or some technical features may be replaced with others, which may not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims (16)

1. A thermal management system, comprising:

the heat exchange substrate comprises a first wall body, a second wall body and a first accommodating cavity positioned between the first wall body and the second wall body, wherein the first accommodating cavity is filled with a first heat exchange medium, the first wall body is used for being connected with a battery cell, and the first heat exchange medium can exchange heat with the battery cell through the first wall body;

the guard plate is positioned on one side of the second wall body, which is away from the first wall body, and is opposite to the second wall body;

the connecting pieces are arranged between the second wall body and the guard plate, and enclose with the guard plate and the second wall body to form at least one air flow channel which is used for heat exchange of the heat exchange substrate.

2. The thermal management system of claim 1, wherein the connector comprises a connection plate.

3. The thermal management system of claim 1, wherein the second wall and the shield are disposed opposite one another along a first direction, and wherein the plurality of connectors are spaced apart along a second direction and define a plurality of air flow passages with the shield and the second wall, the second direction intersecting the first direction.

4. The thermal management system of claim 1, further comprising a support member positioned in the first receiving cavity, opposite ends of the support member being connected to the first and second walls, respectively.

5. The thermal management system of claim 4, wherein the support is provided with through holes for circulating a first heat exchange medium.

6. The thermal management system of any of claims 1-5, further comprising a thermally conductive side plate for exchanging heat with the battery cell,

the heat conduction side plate is connected to one side of the first wall body, which is away from the second wall body, in an angle mode, and can exchange heat with the first wall body.

7. The thermal management system of claim 6, wherein the number of thermally conductive side plates is plural, and the plurality of thermally conductive side plates are disposed at intervals and form at least one accommodating space for accommodating the battery cells with the heat exchange substrate.

8. The thermal management system of claim 7, wherein the second wall and the guard plate are disposed opposite each other in a first direction, and wherein the plurality of thermally conductive side plates are spaced apart and sequentially opposite each other in a third direction, the third direction intersecting the first direction.

9. The thermal management system of claim 6, wherein the thermally conductive side plate has a second receiving cavity in communication with the first receiving cavity and filled with the first heat exchange medium.

10. The thermal management system of claim 9, wherein the first heat exchange medium comprises a phase change material.

11. The thermal management system of claim 6, wherein the thermally conductive side plate has a third receiving cavity filled with a second heat exchange medium capable of heat exchanging with the heat exchange substrate.

12. The thermal management system of claim 11, wherein the first heat exchange medium comprises a heat exchange fluid and the second heat exchange medium comprises a phase change material.

13. The thermal management system of any one of claims 1-5, further comprising a power mechanism and a heat exchanger, the power mechanism, the heat exchanger, and the first receiving chamber in communication, the heat exchanger configured to exchange heat with the first heat exchange medium, the power mechanism configured to power the first heat exchange medium into the heat exchanger.

14. A battery case, comprising the thermal management system of any one of claims 1-13 and a plurality of side walls connected to the heat exchange substrate and enclosing with the heat exchange substrate a receiving space for receiving a battery cell.

15. A battery, comprising:

a battery cell;

the thermal management system of any one of claims 1-13 or the housing of the battery of claim 14, the first wall carrying the battery cells.

16. An electrical device comprising a battery as claimed in claim 15 for providing electrical energy.