Heat sink and battery thermal management method

Abstract

Embodiments of the present application provide a heat sink and a battery thermal management method, and relate to the field of battery heat dissipation. The heat sink comprises a first plate body and a second plate body, two ends of the first plate body are respectively provided with a first liquid inlet and a first liquid outlet, the first plate body has a first plate cavity, the first liquid inlet, the first plate cavity and the first liquid outlet are sequentially communicated along a first preset direction, two ends of the second plate body are respectively provided with a second liquid inlet and a second liquid outlet, the second plate body has a second plate cavity, the second liquid inlet, the second plate cavity and the second liquid outlet are sequentially communicated along a second preset direction, wherein the first liquid outlet and the second liquid inlet are communicated, the first preset direction and the second preset direction are opposite, the flowing medium in the first plate cavity along the first preset direction and the flowing medium in the second plate cavity along the second preset direction are reversely and gradually heat exchanged, which can make the battery heat dissipation or temperature rise more uniform, and avoid abnormal conditions of the battery.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of battery heat dissipation, in particular to a heat sink and a battery thermal management method. BACKGROUND

[0002] For new energy vehicles, the battery is an important power source, and the performance of such vehicles largely depends on the performance of the battery configured therefor, and the temperature of the battery is a crucial factor affecting the performance of the power battery.

[0003] In the prior art, the battery heat dissipation or heating is uneven, which leads to abnormal conditions of the battery, such as thermal runaway, severe swelling and explosion, etc. SUMMARY

[0004] The present application provides a heat sink and a battery thermal management method, which can make the battery heat dissipation or heating more uniform, and avoid abnormal conditions of the battery.

[0005] Embodiments of the present application can be implemented as follows:

[0006] Embodiments of the present application provide a heat sink, which comprises:

[0007] a first plate body, first liquid inlets and first liquid outlets are respectively arranged at two ends of the first plate body, the first plate body has a first plate cavity, and the first liquid inlet, the first plate cavity and the first liquid outlet are sequentially communicated along a first preset direction; and

[0008] a second plate body, second liquid inlets and second liquid outlets are respectively arranged at two ends of the second plate body, the second plate body has a second plate cavity, and the second liquid inlet, the second plate cavity and the second liquid outlet are sequentially communicated along a second preset direction;

[0009] wherein the first liquid outlet and the second liquid inlet are communicated, the first preset direction and the second preset direction are opposite, and the flowing medium in the first plate cavity along the first preset direction and the flowing medium in the second plate cavity along the second preset direction are reversely and gradually exchanged.

[0010] Optionally, the second plate body is at least partially arranged in the first plate body, and the inner and outer walls of the part of the second plate body in the first plate body are spaced from the inner wall of the first plate body.

[0011] Optionally, the second plate body comprises a liquid inlet portion, a heat exchange portion and a liquid outlet portion which are sequentially connected along the second preset direction;

[0012] the heat exchange portion is spaced from the inner wall of the first plate body, the second liquid inlet is distributed in the liquid inlet portion, and the second liquid outlet is distributed in the liquid outlet portion;

[0013] The liquid outlet portion protrudes relative to the end of the first plate body.

[0014] Optionally, the heat sink further comprises a header pipe, the header pipe defines a header cavity, one end of the first plate body away from the first liquid inlet is connected to the header pipe, the first liquid outlet, the header cavity and the second liquid inlet are sequentially communicated.

[0015] The liquid inlet portion protrudes relative to the end of the first plate body and is located in the header cavity.

[0016] Optionally, the header pipe comprises a pipe body and a plug cover, the header cavity and a port of the pipe body are communicated, the plug cover is installed at the end of the pipe body to seal the port of the pipe body, and the pipe body and the plug cover jointly define the header cavity.

[0017] Optionally, a plurality of inner connecting plates are arranged in the second plate body, the plurality of inner connecting plates are arranged at intervals and are connected to the inner wall of the second plate body to define a plurality of inner flow channels in the second plate cavity.

[0018] Optionally, a plurality of connecting plates are arranged in the first plate body, the plurality of connecting plates are arranged at intervals and are connected to the inner wall of the first plate body and the outer wall of the second plate body to define a plurality of outer flow channels in the first plate cavity.

[0019] Optionally, the second plate body is at least partially arranged in the first plate body, and part of the inner wall of the first plate body and part of the outer wall of the second plate body are attached.

[0020] Optionally, part of the outer wall of the second plate body and part of the outer wall of the first plate body are attached.

[0021] Optionally, the heat sink further comprises a header, the header comprises an outer header pipe body and an inner header pipe body, the inner header pipe body is arranged in the outer header pipe body, a first flow channel is defined between the inner wall of the outer header pipe body and the outer wall of the inner header pipe body, and a second flow channel is defined in the inner header pipe body.

[0022] The end of the first plate body penetrates the outer header pipe body, the end of the second plate body sequentially penetrates the outer header pipe body and the inner header pipe body, the first flow channel and the first plate cavity are communicated, and the second flow channel and the second plate cavity are communicated.

[0023] Optionally, the header further comprises a liquid inlet pipe and a liquid outlet pipe, the liquid inlet pipe penetrates the outer header pipe body and is communicated with the first flow channel, and the liquid outlet pipe is connected to the inner header pipe body and is communicated with the second flow channel.

[0024] Optionally, the current collector further comprises an outer current collector tube cover, which is installed at an end of the outer current collector tube body to seal the port of the outer current collector tube body, and the outer current collector tube cover is provided with a tube hole, and the inner current collector tube body is arranged in the tube hole.

[0025] Optionally, the current collector further comprises an inner current collector tube cover, which is installed at an end of the inner current collector tube body away from the liquid outlet pipe to seal the port of the inner current collector tube body.

[0026] Optionally, the number of the first plate body and the second plate body is multiple.

[0027] Embodiments of the present application also provide a battery thermal management method for cooling or heating a battery, which adopts the heat sink described above, and the battery thermal management method comprises:

[0028] The battery is arranged in the first plate body, and the battery is arranged close to the first plate cavity relative to the second plate cavity.

[0029] The first liquid inlet is filled with a flow medium, so that the flow medium sequentially passes through the first plate cavity, the first liquid outlet, the second liquid inlet, the second plate cavity and the second liquid outlet, and the flow direction of the flow medium in the first plate cavity is opposite to the flow direction of the flow medium in the second plate cavity.

[0030] The heat sink and the battery thermal management method have the following advantages, for example:

[0031] Embodiments of the present application provide a heat sink, which comprises a first plate body and a second plate body, two ends of the first plate body are respectively provided with a first liquid inlet and a first liquid outlet, the first plate body has a first plate cavity, the first liquid inlet, the first plate cavity and the first liquid outlet are sequentially communicated along a first preset direction, two ends of the second plate body are respectively provided with a second liquid inlet and a second liquid outlet, the second plate body has a second plate cavity, the second liquid inlet, the second plate cavity and the second liquid outlet are sequentially communicated along a second preset direction, wherein the first liquid outlet and the second liquid inlet are communicated, the first preset direction and the second preset direction are opposite, and the flow medium in the first plate cavity along the first preset direction and the flow medium in the second plate cavity along the second preset direction are reversely and gradually exchanged heat. The heat sink can cool or heat the battery, and the flow medium in the second plate cavity is reversely flowed to exchange heat with the flow medium in the first plate cavity again, so that the temperature distribution of the flow medium in the first plate cavity is more uniform, and the cooling or heating of the battery is more uniform, which can make the battery cooling or heating more uniform and avoid abnormal conditions of the battery.

[0032] The embodiment of the present application also provides a battery thermal management method for cooling or heating a battery, which adopts the heat sink, and the battery thermal management method comprises the following steps: arranging the battery on the first plate body, so that the battery is close to the first plate cavity relative to the second plate cavity, filling the first liquid inlet with a flowing medium, so that the flowing medium sequentially passes through the first plate cavity, the first liquid outlet, the second liquid inlet, the second plate cavity and the second liquid outlet, and finally, the flowing direction of the flowing medium in the first plate cavity is opposite to the flowing direction of the flowing medium in the second plate cavity, so that the battery cooling or heating is more uniform, and abnormal conditions of the battery are avoided. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows, and it should be understood that the following drawings only show some of the embodiments of the present application, and therefore should not be regarded as a limitation to the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of the drawings.

[0034] Figure 1 The schematic diagram of the heat sink provided in the embodiment of the present application is shown in the figure.

[0035] Figure 2 The sectional view of the heat sink provided in the embodiment of the present application is shown in the figure.

[0036] Figure 3 The exploded view of the heat sink provided in the embodiment of the present application is shown in the figure.

[0037] Figure 4 The schematic diagram of the partial structure of the heat sink provided in the embodiment of the present application is shown in the figure.

[0038] Figure 5 The schematic diagram of the partial structure of the heat sink provided in the other embodiment of the present application is shown in the figure.

[0039] Figure 6 The sectional view of the heat sink provided in the other embodiment of the present application is shown in the figure.

[0040] Icon: 1000-heat sink; 100-first plate body; 110-first liquid inlet; 120-first liquid outlet; 130-first plate cavity; 140-outer flow channel; 101-connection plate; 200-second plate body; 210-second liquid inlet; 220-second liquid outlet; 230-second plate cavity; 240-inner flow channel; 201-liquid inlet part; 202-heat exchange part; 203-liquid outlet part; 204-inner connection plate; 300-collector; 310-tube body; 320-plug cover; 301-collector cavity; 400-collector; 410-outer collector tube body; 420-inner collector tube body; 401-first flow channel; 402-second flow channel; 430-liquid inlet pipe; 440-liquid outlet pipe; 450-outer collector tube plug; 451-tube body hole; 460-inner collector tube plug. DETAILED DESCRIPTION

[0041] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0042] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0043] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0044] In the description of the present application, it should be noted that if the terms "upper", "lower", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the present application is usually placed, which is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0045] In addition, if the terms "first", "second" and the like appear, they are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0046] It should be noted that the features in the embodiments of the present application can be combined with each other without conflict.

[0047] For new energy vehicles, the battery is an important power source, and the performance of such vehicles depends largely on the performance of the battery configured, and the temperature of the battery is a crucial factor affecting the performance of the power battery. New energy vehicles are generally divided into pure electric vehicles and hybrid electric vehicles, both of which need to use batteries as power sources, can achieve zero pollution in use, and can use coal, water power and other non-petroleum resources, effectively solving the problem of automobile pollution and energy, and thus have been widely valued in the world.

[0048] In the prior art, when the vehicle is running under different driving conditions, the battery will be discharged at different rates, and a large amount of heat will be generated at different heat generation rates, and the time accumulation and space influence will cause uneven heat accumulation, resulting in complex and variable battery pack operating temperature.

[0049] Then due to uneven heat dissipation of the battery, the battery is prone to dangerous situations, for example, excessive temperature can cause reduction of capacity, life and energy efficiency of the battery, if the heat accumulated in the battery cannot be dissipated in time, it will cause thermal runaway, and in severe cases, the battery can have a risk of severe expansion and explosion, at this time, the power lithium battery must be cooled. At low temperatures, the activity of lithium ions in lithium batteries is reduced, and lithium precipitation can easily pierce the diaphragm, causing battery short circuit and triggering thermal runaway phenomenon, so the battery needs to be heated. Therefore, the battery needs to be heat managed to keep its working temperature in an optimal range.

[0050] Therefore, the heat sink and battery thermal management method provided in the embodiments of the present application can solve this problem.

[0051] Please refer to Figures 1-6 The present embodiment provides a heat sink 1000 and a battery thermal management method, which will be described in detail.

[0052] Please refer to Figure 1 and Figure 2The embodiment of the present application provides a radiator 1000 which can uniformly radiate or heat the battery, and the radiator 1000 comprises a first plate body 100 and a second plate body 200, first liquid inlet 110 and first liquid outlet 120 are arranged at two ends of the first plate body 100 respectively, the first plate body 100 has a first plate cavity 130, the first liquid inlet 110, the first plate cavity 130 and the first liquid outlet 120 are sequentially communicated along a first preset direction, the second plate body 200 has a second liquid inlet 210 and a second liquid outlet 220 arranged at two ends thereof respectively, and the second plate body 200 has a second plate cavity 230, the second liquid inlet 210, the second plate cavity 230 and the second liquid outlet 220 are sequentially communicated along a second preset direction, wherein the first liquid outlet 120 and the second liquid inlet 210 are communicated, the first preset direction and the second preset direction are opposite, and the flowing medium in the first plate cavity 130 along the first preset direction and the flowing medium in the second plate cavity 230 along the second preset direction are reversely and gradually exchanged.

[0053] It should be noted that the first plate body 100 and the second plate body 200 can be rectangular plate body structures, and the two ends refer to the opposite two ends along the length direction or the width direction, in other embodiments, the first plate body 100 and the second plate body 200 can also be circular plate body structures, and the two ends can refer to the opposite two ends along the center line of the circular surface.

[0054] Wherein, the relative position relationship in Figure 2 is explained, in the embodiment, the first preset direction is from left to right, and the second preset direction is from right to left, when the battery needs to be radiated, the flowing medium is a refrigerant medium, for example, a coolant, when the battery needs to be heated, the flowing medium is a heating medium, in addition, the number of the first plate body 100 and the second plate body 200 is multiple, specifically, the number of the first plate body 100 and the second plate body 200 is two, so as to expand the radiating or heating range.

[0055] Specifically, when the radiator 1000 radiates or heats the battery, the battery is arranged at a position close to the outer wall of the first plate body 100 or directly contacts the outer wall of the first plate body 100, and the flowing medium in the second plate cavity 230 is reversely flowed to exchange heat with the flowing medium in the first plate cavity 130 again, so that the temperature distribution of the flowing medium in the first plate cavity 130 is more uniform, and the radiator 1000 can more uniformly radiate or heat the battery, so that the radiator 1000 can more uniformly radiate or heat the battery, and abnormal conditions of the battery can be avoided, and it is easy to understand that the reverse and gradual heat exchange of the flowing medium can be understood as that the flowing medium in the second plate cavity 230 can cool or heat the flowing medium in the first plate cavity 130, so that the temperature difference between the two ends of the first plate cavity 130 can be reduced, the uniformity of the temperature in the first plate cavity 130 is improved, and the temperature of the battery is prevented from being too low or too high.

[0056] For example, when the first plate cavity 130 is filled with refrigerant medium, the battery is cooled, the temperature of the refrigerant medium flowing through the first plate cavity 130 rises, and then enters the second plate cavity 230, and then the refrigerant medium in the first plate cavity 130 is heated. The heating effect of the refrigerant medium closer to the first inlet 110 is more obvious, thereby reducing the temperature difference between the two ends of the first plate cavity 130 and improving the uniformity of the temperature. The first plate cavity 130 is filled with hot working medium, and the battery is heated. The principle is basically the same as filling the refrigerant medium, which will not be described here.

[0057] In this embodiment, in order to facilitate assembly and reduce cost, the second plate body 200 is at least partially arranged in the first plate body 100. The inner and outer walls of the part of the second plate body 200 located in the first plate body 100 are spaced from the inner wall of the first plate body 100. Of course, the second plate body 200 can also be completely arranged in the first plate body 100.

[0058] Specifically, the second plate body 200 includes a liquid inlet portion 201, a heat exchange portion 202, and a liquid outlet portion 203 connected in sequence in a second predetermined direction. The heat exchange portion 202 is spaced from the inner wall of the first plate body 100. The second inlet 210 is distributed in the liquid inlet portion 201, and the second outlet 220 is distributed in the liquid outlet portion 203. In this way, the outer wall of the entire heat exchange portion 202 can contact the flowing medium for heat exchange, thereby improving the heat exchange efficiency.

[0059] At the same time, in order to facilitate the flowing medium to flow from the first plate cavity 130 to the second plate cavity 230, the liquid inlet portion 201 protrudes relative to the end of the first plate body 100. The heat sink 1000 further includes a collecting pipe 300. The collecting pipe 300 defines a collecting cavity 301. One end of the first plate body 100 away from the first inlet 110 is connected to the collecting pipe 300. The first outlet 120, the collecting cavity 301, and the second inlet 210 are sequentially communicated. The liquid inlet portion 201 is located in the collecting cavity 301, so that the flowing medium flows out from the first outlet 120 in the upward and downward directions, and then enters the second plate cavity 230 from the liquid inlet portion 201. In this embodiment, the collecting pipe 300 is in the shape of a cylinder, and the diameter thereof is greater than the thickness of the first plate body 100.

[0060] Specifically, the collecting pipe 300 includes a pipe body 310 and two plugs 320. The pipe body 310 and the two plugs 320 jointly define the collecting cavity 301. The collecting cavity 301 and the port of the pipe body 310 are communicated. The two plugs 320 are installed at the ends of the pipe body 310, i.e., the two plugs 320 are installed at the two ends of the pipe body 310, so as to seal the port of the pipe body 310 and prevent the flowing medium from leaking.

[0061] In addition, in order to facilitate the filling of the flow medium, the heat sink 1000 further comprises a current collector 400, which comprises an outer current collector tube body 410 and an inner current collector tube body 420. Both the outer current collector tube body 410 and the inner current collector tube body 420 are columnar tube bodies, and the inner current collector tube body 420 is arranged in the outer current collector tube body 410. The inner wall of the outer current collector tube body 410 and the outer wall of the inner current collector tube body 420 define a first flow channel 401, and the inner current collector tube body 420 defines a second flow channel 402.

[0062] The end of the first plate body 100 penetrates the outer current collector tube body 410, and the end of the second plate body 200 penetrates the outer current collector tube body 410 and the inner current collector tube body 420 in sequence. Specifically, the liquid outlet portion 203 protrudes relative to the end of the first plate body 100, that is, the liquid outlet portion 203 protrudes relative to the left end of the first plate body 100 and penetrates the outer current collector tube body 410 and the inner current collector tube body 420 in sequence. The first flow channel 401 and the first plate cavity 130 are in communication, and the second flow channel 402 and the second plate cavity 230 are in communication.

[0063] Please continue to refer to Figure 2 In combination with FIG. 3, in order to facilitate the connection of the pipeline, the current collector 400 further comprises a liquid inlet pipe 430 and a liquid outlet pipe 440. The liquid inlet pipe 430 penetrates the outer current collector tube body 410 and is in communication with the first flow channel 401. The liquid outlet pipe 440 is connected with the inner current collector tube body 420 and is in communication with the second flow channel 402. After the flow medium flows into the liquid inlet pipe 430, it sequentially passes through the first flow channel 401, the first plate cavity 130, the current collecting cavity 301, the second plate cavity 230, and the second flow channel 402, and then flows out from the liquid outlet pipe 440.

[0064] In order to prevent leakage of the flow medium, the current collector 400 further comprises two outer current collector tube plugs 450, which are installed at the ends of the outer current collector tube body 410, that is, the two outer current collector tube plugs 450 are installed at the two ports of the outer current collector tube body 410 to seal the ports of the outer current collector tube body 410.

[0065] In order to facilitate the flow of the flow medium out of the liquid outlet pipe 440, the outer current collector tube plug 450 is provided with a tube hole 451, and the inner current collector tube body 420 is arranged in the tube hole 451, so that the liquid outlet pipe 440 is located outside the outer current collector tube body 410.

[0066] In this embodiment, the current collector 400 further comprises an inner current collector tube plug 460, which is installed at the end of the inner current collector tube body 420 away from the liquid outlet pipe 440 to seal the port of the inner current collector tube body 420. The end of the inner current collector tube body 420 away from the liquid outlet pipe 440 also protrudes relative to the end of the outer current collector tube body 410.

[0067] Please refer to Figure 4In order to improve the heat exchange efficiency, the second plate body 200 is provided with a plurality of inner connecting plates 204, the plurality of inner connecting plates 204 are arranged at intervals and connected to the inner wall of the second plate body 200, so as to define a plurality of inner flow channels 240 which are spaced apart from each other in the second plate cavity 230. The second plate body 200 is similar to a harmonica structure. It can be understood that the inner connecting plates 204 are vertically connected to the opposite two side walls of the second plate body 200, and the inner connecting plates 204 can be integrally formed with the second plate body 200.

[0068] In addition, the first plate body 100 is provided with a plurality of connecting plates 101, the plurality of connecting plates 101 are arranged at intervals and connected to the inner wall of the first plate body 100 and the outer wall of the second plate body 200, so as to define a plurality of outer flow channels 140 which are spaced apart from each other in the first plate cavity 130. The inner flow channels 240 and the outer flow channels 140 are communicated. The connecting plates 101 are vertically connected between the outer wall of the second plate body 200 and the inner wall of the first plate body 100, and the connecting plates 101 can be integrally formed with the first plate body 100.

[0069] Please refer to Figure 5 and Figure 6 In other embodiments, at least part of the second plate body 200 is arranged in the first plate body 100. Specifically, the two ends of the second plate body 200 also protrude relative to the end of the first plate body 100, and part of the inner wall of the first plate body 100 and part of the outer wall of the second plate body 200 are attached.

[0070] Among them, with Figure 6 the relative position relationship as an illustration, the lower inner wall of the first plate body 100 and the lower outer wall of the second plate body 200 are completely attached. At this time, the flowing medium flowing through the first plate cavity 130 mainly exchanges heat with the upper outer wall of the second plate body 200.

[0071] It should be noted that in other embodiments, the second plate body 200 and the first plate body 100 can also be arranged in a laminated manner, that is, part of the outer wall of the second plate body 200 and part of the outer wall of the first plate body 100 are attached.

[0072] In addition, the embodiment of the present application also provides a battery thermal management method for cooling or heating a battery, which adopts the heat sink 1000 described above to perform thermal management on the battery, and the battery thermal management method comprises the following steps: placing the battery on the first plate body 100, making the battery close to the first plate cavity 130 relative to the second plate cavity 230, and filling the first liquid inlet 110 with a flowing medium; when it is needed to cool the battery, the flowing medium is a refrigerant medium, such as a coolant; when it is needed to heat the battery, the flowing medium is a heating medium; the flowing medium sequentially passes through the first plate cavity 130, the first liquid outlet 120, the second liquid inlet 210, the second plate cavity 230 and the second liquid outlet 220; finally, the flowing direction of the flowing medium in the first plate cavity 130 is opposite to the flowing direction of the flowing medium in the second plate cavity 230, so that the battery cooling or heating is more uniform, and the abnormal situation of the battery is avoided.

[0073] The abnormal situation of the battery includes, for example, that a too high temperature can cause the capacity, the service life and the energy efficiency of the battery to decrease, and if the heat accumulated in the battery cannot be dissipated in time, the thermal runaway can be caused, and in a serious case, the battery can be in danger of violent expansion and explosion. At low temperature, the lithium ion activity of the lithium battery is reduced, and the lithium battery is prone to lithium precipitation to pierce the diaphragm, cause the battery short circuit and trigger the thermal runaway phenomenon.

[0074] In summary, the heat sink 1000 comprises the first plate body 100 and the second plate body 200, the first plate body 100 is provided with the first liquid inlet 110 and the first liquid outlet 120 at two ends thereof respectively, the first plate body 100 has the first plate cavity 130 therein, the first liquid inlet 110, the first plate cavity 130 and the first liquid outlet 120 are sequentially communicated along a first preset direction, the second plate body 200 is provided with the second liquid inlet 210 and the second liquid outlet 220 at two ends thereof respectively, the second plate body 200 has the second plate cavity 230 therein, the second liquid inlet 210, the second plate cavity 230 and the second liquid outlet 220 are sequentially communicated along a second preset direction.

[0075] The first liquid outlet 120 and the second liquid inlet 210 are communicated, the first preset direction and the second preset direction are opposite, and the flowing medium in the first plate cavity 130 along the first preset direction and the flowing medium in the second plate cavity 230 along the second preset direction are reversely and gradually exchanged heat. The heat sink 1000 can cool or heat the battery, the flowing medium in the second plate cavity 230 is reversely flowed to exchange heat with the flowing medium in the first plate cavity 130 again, so that the temperature distribution of the flowing medium in the first plate cavity 130 is more uniform, and the battery cooling is more uniform, and the abnormal situation of the battery is avoided.

[0076] The battery thermal management method for cooling or heating the battery adopts the heat sink 1000 described above, and the battery thermal management method comprises the following steps: arranging the battery on the first plate body 100, making the battery close to the first plate cavity 130 relative to the second plate cavity 230, and filling the flowing medium into the first liquid inlet 110, so that the flowing medium sequentially passes through the first plate cavity 130, the first liquid outlet 120, the second liquid inlet 210, the second plate cavity 230 and the second liquid outlet 220, and finally, the flowing direction of the flowing medium in the first plate cavity 130 is opposite to the flowing direction of the flowing medium in the second plate cavity 230. The method can make the battery cooling or heating more uniform, and avoid abnormal conditions of the battery.

[0077] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A heat sink, characterized by, The application relates to a heat exchange device, which comprises the following parts: a first plate body (100) with a first liquid inlet (110) and a first liquid outlet (120) at two ends respectively, a first plate cavity (130) in the first plate body (100), and the first liquid inlet (110), the first plate cavity (130) and the first liquid outlet (120) sequentially communicating along a first preset direction; and a second plate body (200) with a second liquid inlet (210) and a second liquid outlet (220) at two ends respectively, a second plate cavity (230) in the second plate body (200), and the second liquid inlet (210), the second plate cavity (230) and the second liquid outlet (220) sequentially communicating along a second preset direction; the second plate body (200) is at least partially arranged in the first plate body (100), and the inner and outer walls of the part of the second plate body (200) in the first plate body (100) are spaced from the inner wall of the first plate body (100); the second plate body (200) comprises a liquid inlet part (201), a heat exchange part (202) and a liquid outlet part (203) sequentially connected along the second preset direction; the heat exchange part (202) is spaced from the inner wall of the first plate body (100), the second liquid inlet (210) is distributed on the liquid inlet part (201), and the second liquid outlet (220) is distributed on the liquid outlet part (203); the liquid outlet part (203) is protruded relative to the end of the first plate body (100); wherein the first liquid outlet (120) and the second liquid inlet (210) are communicated, the first preset direction and the second preset direction are opposite, and the flowing medium in the first plate cavity (130) along the first preset direction and the flowing medium in the second plate cavity (230) along the second preset direction are reversely and gradually heat-exchanged; a current collector (400) comprising an outer current collector pipe body (410) and an inner current collector pipe body (420), the inner current collector pipe body (420) being arranged in the outer current collector pipe body (410), a first flow channel (401) being defined between the inner wall of the outer current collector pipe body (410) and the outer wall of the inner current collector pipe body (420), and a second flow channel (402) being defined in the inner current collector pipe body (420); the end of the first plate body (100) penetrates the outer current collector pipe body (410), the end of the second plate body (200) sequentially penetrates the outer current collector pipe body (410) and the inner current collector pipe body (420), the first flow channel (401) is communicated with the first plate cavity (130), and the second flow channel (402) is communicated with the second plate cavity (230).

2. The heat spreader of claim 1, wherein, The heat sink further comprises a header pipe (300) defining a header cavity (301), one end of the first plate body (100) being connected to the header pipe (300) away from the first liquid inlet (110), the first liquid outlet (120), the header cavity (301) and the second liquid inlet (210) being sequentially communicated. The liquid inlet portion (201) protrudes relative to the end of the first plate body (100) and is located in the header cavity (301).

3. The heat sink of claim 2, wherein, The header pipe (300) comprises a pipe body (310) and a plug cover (320), the header cavity (301) and a port of the pipe body (310) being communicated, and the plug cover (320) being installed at an end of the pipe body (310) to seal the port of the pipe body (310). The pipe body (310) and the plug cover (320) jointly define the header cavity (301).

4. The heat spreader of claim 1, wherein, The second plate body (200) is provided with a plurality of inner connecting plates (204), the plurality of inner connecting plates (204) being arranged at intervals and connected to inner walls of the second plate body (200) to divide the second plate cavity (230) into a plurality of inner flow channels (240) at intervals.

5. The heat sink of claim 4, wherein, The first plate body (100) is provided with a plurality of connecting plates (101), the plurality of connecting plates (101) being arranged at intervals and connected to inner walls of the first plate body (100) and outer walls of the second plate body (200) to divide the first plate cavity (130) into a plurality of outer flow channels (140) at intervals.

6. The heat spreader of claim 1, wherein, The second plate body (200) is at least partially arranged in the first plate body (100), and part of the inner walls of the first plate body (100) and part of the outer walls of the second plate body (200) are attached.

7. The heat spreader of claim 1, wherein, Part of the outer walls of the second plate body (200) and part of the outer walls of the first plate body (100) are attached.

8. The heat spreader of claim 1, wherein, The header (400) further comprises a liquid inlet pipe (430) and a liquid outlet pipe (440), the liquid inlet pipe (430) penetrating through the outer header pipe body (410) and being communicated with the first flow channel (401), and the liquid outlet pipe (440) being connected to the inner header pipe body (420) and being communicated with the second flow channel (402).

9. The heat sink of claim 8, wherein, The header (400) further comprises an outer header pipe plug cover (450) installed at an end of the outer header pipe body (410) to seal a port of the outer header pipe body (410), and the outer header pipe plug cover (450) is provided with a pipe body hole (451), and the inner header pipe body (420) is arranged in the pipe body hole (451).

10. The heat sink of claim 9, wherein, The header (400) further comprises an inner header pipe plug cover (460) installed at an end of the inner header pipe body (420) away from the liquid outlet pipe (440) to seal a port of the inner header pipe body (420).

11. The heat spreader of claim 1, wherein, The number of the first plate body (100) and the second plate body (200) is multiple.

12. A battery thermal management method for cooling or heating a battery, the method comprising: The battery thermal management method comprises: The heat sink of any one of claims 1-11, the battery thermal management method comprises: The battery is arranged on the first plate body (100), and the battery is close to the first plate cavity (130) relative to the second plate cavity (230); The first liquid inlet (110) is filled with a flowing medium, so that the flowing medium sequentially passes through the first plate cavity (130), the first liquid outlet (120), the second liquid inlet (210), the second plate cavity (230) and the second liquid outlet (220), and the flowing direction of the flowing medium in the first plate cavity (130) is opposite to the flowing direction of the flowing medium in the second plate cavity (230).

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