Vehicle battery heat transfer member and vehicle battery module

Abstract

A vehicle battery heat transfer member according to one embodiment of the present invention is disposed between battery cells to transfer heat generated in the battery cells toward a cooling plate, and may include: a main plate in which a cooling channel is formed such that a working fluid passes through the cooling channel; and a cover plate coupled to both surfaces of the main plate, in which bridge portions may be formed between the cooling channels in the main plate, the bridge portions connecting the cooling channels in the width direction. According to the present invention, by minimizing an increase in volume and weight of an existing heat exchange member, the vehicle battery heat transfer member can stably maintain the temperature of the battery cell even during high-speed charging or high-power operation of the battery; and since the bridge portion is provided on the cooling channel formed in the main plate, the structure of the cooling channel can be stably supported.

Description

TECHNICAL FIELD

[0001] The present application relates to a vehicle battery heat transfer member, and more particularly, to a vehicle battery heat transfer member and a vehicle battery module for stably maintaining the temperature of a battery cell. BACKGROUND

[0002] Unlike primary batteries that cannot be recharged, secondary batteries are batteries that can be charged and discharged, and are used not only as power sources in the field of small high-tech electronic devices such as portable phones, notebooks, and computers, but also in energy storage systems (ESS) and electric or hybrid vehicles.

[0003] Among them, the operating temperature of a lithium ion battery mainly used for a vehicle battery is generally in the range of 0℃ to 60℃. However, when the temperature in the battery becomes lower, the capacity of the battery decreases due to an increase in the internal resistance of the battery cell, and when the internal temperature of the battery cell becomes more than 60℃, the possibility of thermal runaway increases. Therefore, a battery management system (BMS) is used to stably maintain the temperature of the battery cell when the vehicle battery is charged or discharged.

[0004] In a conventional vehicle battery cooling device disclosed in Korean Patent Publication No. 10-2020-0125114, a heat exchange member that exchanges heat with a battery cell is disclosed. When the size of the battery cell increases or the amount of heat generated in the battery cell increases in the heat transfer direction, the difference between the maximum temperature and the minimum temperature of the battery cell increases, which results in a decrease in the efficiency and stability of the battery cell, and thus the heat exchange member is disposed.

[0005] The improvement in cooling performance using the heat exchange member disclosed in the related art depends on the thickness and thermal conductivity of the heat exchange element. More specifically, as the thermal conductivity of the heat exchange member is higher and the thickness is greater, the cooling performance can be improved. However, when the thermal conductivity and thickness of the heat exchange member are changed, there is a problem that the size and weight of the entire battery module increase. SUMMARY

[0006] The present application aims to provide a vehicle battery heat transfer member and a vehicle battery module that can stably maintain the temperature of a battery cell even during high-speed charging or high-power operation of a battery by minimizing the increase in volume and weight caused by the existing heat exchange member.

[0007] In addition, the present application aims to provide a vehicle battery heat transfer member and a vehicle battery module in which the structure of a cooling passage is stably supported because a bridging portion is provided on the cooling passage formed in a main plate.

[0008] The objects to be achieved by the present application are not limited to the above-described objects, and other objects not described above will become apparent to those skilled in the art from the following description.

[0009] According to an aspect of the present application, there is provided a vehicle battery heat transfer member disposed between battery cells to transfer heat generated in the battery cells toward a cooling plate, and the vehicle battery heat transfer member includes a main plate in which cooling channels through which a working fluid passes are formed, and a cover plate coupled to both surfaces of the main plate, wherein a bridge portion is formed between the cooling channels in the main plate, the bridge portion connecting the cooling channels in a width direction.

[0010] The bridge portion can be disposed to be located on an extension line of a longitudinal direction of the main plate.

[0011] The cooling channel can include an outer peripheral portion communicating with an injection portion via which the working fluid is injected, and a capillary tube portion extending from each end portion of the outer peripheral portion and formed to be bent from both ends of the outer peripheral portion to form a closed loop inside the outer peripheral portion.

[0012] The bridge portion can be formed only in one linear section of the end portion of the capillary tube portion.

[0013] The cover plate can be made of a cladding material.

[0014] The injection portion via which the working fluid is injected can be provided on one side of the main plate, and a cover injection portion corresponding to the injection portion can be provided on one side of the cover plate.

[0015] After the working fluid is injected through the injection portion, the cover injection portion can be press-fitted to the cover plate on the opposite side to close the injection portion, and a pinch groove can be formed on a surface of the cover injection portion.

[0016] According to another aspect of the present application, there is provided a vehicle battery module including a plurality of battery cells stacked adjacent to each other, a vehicle battery heat transfer member provided between the battery cells, a thermal interface material disposed below the battery cells, and a cooling block provided below the thermal interface material.

[0017] A surface contact portion can be provided in the battery heat transfer member, the surface contact portion extending to make surface contact with the thermal interface material.

[0018] An end portion of the surface contact portion can be bent to make surface contact with a surface or an internal portion of the thermal interface material. BRIEF DESCRIPTION OF DRAWINGS

[0019] The above and other objects, features and advantages of the present application will become more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:

[0020] Figure 1 is an exploded perspective view showing a vehicle battery heat transfer member according to an embodiment of the present application;

[0021] Figure 2 is a perspective view showing a main plate of a vehicle battery heat transfer member according to an embodiment of the present application;

[0022] Figure 3 is a plan view showing a main plate of a vehicle battery heat transfer member according to an embodiment of the present application;

[0023] Figure 4 is an enlarged view showing a region shown in Figure 3 ;

[0024] Figure 5 is a cross-sectional view along line A-A of Figure 4 ;

[0025] Figure 6 is a cross-sectional view along line B-B of ;

[0026] Figure 7 is a perspective view showing an extrusion portion which has not yet been formed in a vehicle battery heat transfer member according to an embodiment of the present application;

[0027] Figure 8 is a perspective view showing an extrusion portion formed in a vehicle battery heat transfer member according to an embodiment of the present application;

[0028] Figure 9 is a plan view showing a vehicle battery heat transfer member according to an embodiment of the present application;

[0029] Figure 10 Figure 9 is a cross-sectional view along line C-C of ;

[0030] Figure 11 Figure 9 is a cross-sectional view along line D-D of ;

[0031] Figure 12 is an enlarged view showing a region shown in Figure 9 ;

[0032] Figure 13 is a cross-sectional view along line E-E of Figure 12 ;

[0033] Figure 14is a cross-sectional view along the line E-E of Figure 12

[0034] Figure 15 is a view illustrating a vehicle battery module according to an embodiment of the present application;

[0035] Figure 16 is a view illustrating one example of a battery heat transfer member in a vehicle battery module according to an embodiment of the present application;

[0036] Figure 17 is a view illustrating another example of a battery heat transfer member in a vehicle battery module according to an embodiment of the present application; and

[0037] Figure 18 is a view illustrating still another example of a battery heat transfer member in a vehicle battery module according to an embodiment of the present application. DETAILED DESCRIPTION

[0038] Since the present application can be variously modified and has a variety of embodiments, specific embodiments will be shown in the drawings and described in detail. However, this is not intended to limit the present application to specific embodiments, and it should be understood that all changes, equivalents, and substitutions falling within the spirit and technical scope of the present application are included in the present application. In the description of the embodiments, certain detailed descriptions of related art can be omitted when it is considered that such detailed descriptions of related art can unnecessarily obscure the gist of the inventive concept.

[0039] Although terms such as "first" and "second" can be used to describe various components, such components are not limited by the above terms. The terms are used only to distinguish one component from another component.

[0040] The terms used herein are only for the purpose of describing particular embodiments and are not intended to limit the present application. Singular forms are intended to include plural forms unless the context clearly indicates otherwise. In this specification, it will be understood that the terms "include", "comprise", "contain" and / or "have" refer to the presence of a feature, number, step, operation, element, component, and / or a combination thereof, but do not exclude the presence or addition of one or more other features, numbers, steps, operations, elements, components, and / or combinations thereof.

[0041] In addition, throughout the specification, when a component is "connected", this can not only mean that two or more components are directly connected, but can also mean that two or more components are indirectly connected through other components or are physically and electrically connected, or even the same component referred to by a different name according to its position or function.

[0042] ​Further, when a first part is described as being formed or disposed "on (over)" or "under" a second part, such description includes both a case where the two parts are formed or disposed in direct contact with each other and a case where one or more other parts are interposed between the two parts. Further, when a first part is described as being formed "on (over) or under" a second part, such description can include a case where the first part is formed on the upper side or the lower side with respect to the second part.

[0043] Hereinafter, one embodiment of a vehicle battery heat transfer member and a vehicle battery module will be described in detail with reference to the accompanying drawings, and when the embodiment is described with reference to the accompanying drawings, the same or corresponding parts will be designated by the same reference numerals, and redundant descriptions thereof will be omitted.

[0044] Figure 1 FIG. 1 is an exploded perspective view illustrating a vehicle battery heat transfer member according to one embodiment of the present application; Figure 2 FIG. 2 is a perspective view illustrating a main plate of a vehicle battery heat transfer member according to one embodiment of the present application; and Figure 3 FIG. 3 is a plan view illustrating a main plate of a vehicle battery heat transfer member according to one embodiment of the present application. Figure 4 FIG. 4 is an enlarged view of a region shown in FIG. 1; and Figure 3 FIG. 5 is a cross-sectional view taken along line A-A of FIG. 4. Figure 5 FIG. 6 is a cross-sectional view taken along line B-B of FIG. 4. Figure 4 FIG. 7 is a cross-sectional view taken along line C-C of FIG. 4.

[0045] According to the drawings, a vehicle battery heat transfer member according to one embodiment of the present application is a vehicle battery heat transfer member 10 disposed between battery cells 20 and transferring heat generated in the battery cells 20 toward a cooling block 40, and the vehicle battery heat transfer member 10 can include a main plate 100 in which cooling channels 120 through which a working fluid passes are formed, and a cover plate 200 coupled to both surfaces of the main plate 100. A bridge portion 130 can be formed between the cooling channels 120 in the main plate 100, the bridge portion 130 connecting the cooling channels 120 in a width direction.

[0046] The battery heat transfer member 10 is disposed between the battery cells 20 and transfers heat to a thermal interface material (TIM) 30 and the cooling block 40. The battery heat transfer member 10 can be disposed in each space between the battery cells 20, or in each space between battery modules formed by a plurality of battery cells 20.

[0047] In this embodiment, a pulsating heat pipe (PHP) is used as the battery heat transfer component 10. The PHP is configured such that a plug-type working fluid, alternately displaying liquid and gas phases, circulates in a closed-loop channel, transferring heat from the evaporation region to the condensation region through its own vibration and during the circulation and self-vibration process. The PHP has the advantages of simple structure and high reliability, and compared to heat pipes with a wick structure, the PHP can be manufactured with a smaller volume.

[0048] like Figure 1 As shown, the battery heat transfer component 10 may include a main board 100 disposed in its central portion and a cover plate 200 coupled to two surfaces of the main board 100 to cover the main board 100. That is, the battery heat transfer component 10 is formed by coupling the main board 100, which has a PHP structure, to the cover plate 200 covering the main board 100.

[0049] The motherboard 100 can be manufactured in a rectangular plate shape. An injection section 110 through which the working fluid is injected is configured to protrude from one side of the motherboard 100. The injection section 110 protrudes from one side of the motherboard 100 by a predetermined length, and an injection channel 112 through which the working fluid flows is formed inside the injection section 110. The injection channel 112 extends from the injection section 110 to the inside of the motherboard 100 and communicates with a cooling channel 120 formed inside the motherboard 100.

[0050] Cooling channel 120 may be formed inside the motherboard 100 and may include an outer peripheral portion 122 and a capillary portion 124. The outer peripheral portion 122 communicates with the injection channel 112. The capillary portion 124 extends from the end portion of the outer peripheral portion 122 and is formed to bend from both end portions of the outer peripheral portion 122 to form a closed loop inside the outer peripheral portion 122. The capillary portion 124 may be formed in a bent shape to form a plurality of channels, and the end portions of the capillary portion 124 may be bent to change the direction of the channels to the opposite direction. In the cooling channel 120 formed as described above, when heat generated in the battery cell 20 is transferred to one end portion of the capillary portion 124, the working fluid transfers heat from the evaporation region to the condensation region (the other end portion) through its own vibration.

[0051] As an example, hydrofluoro-olefin (HFO) can be used as the working fluid flowing through cooling channel 120, but the invention is not limited thereto, and one of various refrigerants can be used as the working fluid.

[0052] In this embodiment, bridging portions 130 connecting the cooling channels 120 in the width direction are provided between the cooling channels 120 in the motherboard 100. The bridging portions 130 can be formed in the width direction of the cooling channels 120 perpendicular to the flow direction of the working fluid, and can be provided along multiple bridging portions 130 of the cooling channels 120.

[0053] The bridging portion 130 is configured to support the cooling channel 120 formed in the motherboard 100. When the bridging portion 130 is not formed, the cooling channel 120 can move without being stably fixed by the PHP structure. The bridging portion 130 can be provided in the outer peripheral portion 122 and the capillary portion 124 constituting the cooling channel 120, and multiple bridging portions 130 can be provided, and multiple bridging portions 130 can be arranged in each portion. For example, multiple bridging portions 130 can be arranged at predetermined intervals along the outer peripheral portion 122. As an example, the bridging portion 130 can be arranged on the end portion of the capillary portion 124. As an example, the bridging portion 130 can be arranged in only one linear segment in the end portion of the capillary portion 124, such as... Figure 4 As shown. That is, the bridging portion 130 can be provided only in one of the two linear sections, and not in the curved portion at the end of the capillary portion 124.

[0054] Furthermore, since the bridging portion 130 is a structure used to stably fix the cooling channel 120 structure, the bridging portion 130 should not obstruct the flow of the working fluid. Therefore, the bridging portion 130 can be formed to occupy a portion of the flow cross-section of the cooling channel 120. (Reference) Figure 5 Based on this figure, the bridging portion 130 may be formed only on the lower side. As an example, the bridging portion 130 may be formed to occupy 50% or less of the flow cross-section of the cooling channel 120. In this figure, it is shown that the bridging portion 130 is formed only on the lower side of the flow cross-section of the cooling channel 120, but the invention is not limited thereto, and the bridging portion 130 may be formed only on the upper side of the flow cross-section of the cooling channel 120 or only in the central portion of the flow cross-section of the cooling channel 120.

[0055] As an example, the bridging portion 130 can be arranged on an extension line in the longitudinal direction of the motherboard 100. This is because the bridging portion 130 is arranged in the width direction of the capillary portion 124, which is arranged parallel to the width direction of the motherboard 100 (the direction perpendicular to the longitudinal direction).

[0056] The thickness of the bridging portion 130 should be designed not to impede the flow of the working fluid. For example, as the thickness of the bridging portion 130 increases, the structure of the cooling channel 120 is stably supported, but the flow of the working fluid becomes less smooth. Conversely, as the thickness of the bridging portion 130 decreases, the flow of the working fluid is smooth, but the structure of the cooling channel 120 may be less stably supported. Therefore, the thickness of the bridging portion 130 needs to be considered in the above-mentioned factors when designing it.

[0057] Figure 6 This is a cross-sectional view showing a stacked structure of a vehicle battery heat transfer component according to an embodiment of the present invention.

[0058] refer to Figure 6 In this embodiment, the cover plate 200 can be made of a cladding material. Typically, the cladding material is a stacked composite material, in which the surfaces of two or more metal materials are integrally bonded. When cladding materials are used appropriately, the advantages of each metal material used in the cladding material are maximized, and the use of expensive materials can be reduced; therefore, cladding materials are widely used in various application areas.

[0059] The cover plate 200 may include a base material 202 and a filler material 204. For example, Al 3003 with a melting point of 640°C can be used as the base material 202, and Al 4047 with a melting point of 577°C can be used as the filler material 204, but the invention is not limited thereto. For example, Al 3003 with a melting point of 640°C can be used as the main board 100, but the invention is not limited thereto.

[0060] Figure 7 This is a perspective view showing an extruded portion not yet formed in a vehicle battery heat transfer component according to an embodiment of the present invention; and Figure 8 This is a perspective view showing an extrusion portion formed in a vehicle battery heat transfer component according to an embodiment of the present invention. Figure 9 This is a plan view showing a vehicle battery heat transfer component according to an embodiment of the present invention. Figure 10 It is along Figure 9 The cross-sectional view of line BB, and Figure 11 It is along Figure 9 A cross-sectional view of line CC.

[0061] refer to Figure 7 This figure shows the extrusion portion 230 that has not yet been formed in the battery heat transfer member 10. That is, this figure shows the state in which the cover plate 200 is coupled to the two surfaces of the main board 100 on which the cooling channel 120 is formed.

[0062] In this state, the working fluid is injected through the injection channel 112 of the injection section 110. The injection section 110 may be located between the cover injection sections 210 formed to correspond to the cover plate 200, so as to allow the working fluid to be injected through the injection channel 112.

[0063] When the injection of the working fluid is completed, the operator closes the injection section 110, so that the cooling channel 120 forms a closed loop. Figure 8 This is a diagram showing an extrusion portion 230 formed in the battery heat transfer member 10 by extrusion molding. That is, after the working fluid is injected, the operator presses down on any one of the cap injection portions 210 of the cover plate 200. In this figure, the cap injection portion 210 coupled to the upper portion of the cover plate 200 is shown being pressed down, and as described above, the pressed cap injection portion 210 forms an extrusion groove 232 after formation. The cap injection portion 210 can be pressed down by a working tool, and as described above, the pressed cap injection portion 210 can press against the injection channel 112 to close the injection channel 112, and the extrusion groove 232 can be formed in the extrusion portion 230. However, when the cap injection portion 210 of the cover plate 200 arranged in the lower portion is pressed down to extrude a mold, the extrusion groove 232 can also be formed on the lower side.

[0064] At the same time, the ends of the injection section 110 and the cap injection section 210 can be cut simultaneously with the pressing process described above.

[0065] refer to Figure 10 The cap injection portion 210 of the cover plate 200 arranged on the upper portion is compressed to bend the curved portion 240 and press the curved portion 240 toward the portion shown in the dashed line. As described above, the pressed cap injection portion 210 is joined to the cap injection portion 210 of the cover plate 200 arranged on the lower portion to close the injection channel 112.

[0066] When the extrusion section 230 is formed on one side of the battery heat transfer member 10, the cooling channel 120 can be closed, and the working fluid can be evaporated and condensed as it flows through the cooling channel 120, which is a closed loop.

[0067] Figure 12 It is shown Figure 9 An enlarged view of the area shown; Figure 13 It is along Figure 12 A cross-sectional view of line DD; and Figure 14 It is along Figure 12 A cross-sectional view of line EE.

[0068] refer to Figures 12 to 14When the extrusion portion 230 is formed in the battery heat transfer member 10, the cooling channel 120 can be closed from the outside, and the bridging portion 130 can be attached to the cover plate 200 disposed on one of its surfaces. However, when the bridging portion 130 is arranged in the central portion of the flow section of the cooling channel 120, the bridging portion 130 may not be attached to the cover plate 200.

[0069] like Figure 13 and Figure 14 As shown, when the bridging portion 130 is provided in the capillary portion 124 of the cooling channel 120, the flow cross-section of the working fluid can be reduced in the vertical direction. In this case, the thickness of the bridging portion 130 should be appropriately designed so as not to obstruct the flow of the working fluid as described above.

[0070] As described above, in the vehicle battery heat transfer component 10, by minimizing the increase in volume and weight caused by conventional heat exchange components, the temperature of the battery cell 20 can be stably maintained even during high-speed charging and high-power operation of the battery.

[0071] Figure 15 This is a diagram illustrating a vehicle battery module according to one embodiment of the present invention.

[0072] refer to Figure 15 According to one embodiment of the present invention, a vehicle battery module may include a plurality of battery cells 20 arranged adjacent to each other, a vehicle battery heat transfer member 10 arranged between the battery cells 20, a TIM 30 arranged below the battery cells 20, and a cooling block 40 arranged below the TIM 30.

[0073] Multiple battery cells 20 can be stacked to make surface contact with each other and be adjacent to each other. The structure of the stacked battery cells 20 making surface contact with each other applies uniform surface pressure to each battery cell 20. Multiple battery cells 20 can form a cell module. In the cell module, the battery cells 20 can be arranged to be stacked adjacent to each other from the front end to the rear end of the cell module. For example, as shown in the figure, three battery cells 20 can make surface contact with each other to form a cell module.

[0074] The battery heat transfer component 10 can be arranged in each space between battery cells 20, or in each space between every two battery cells 20. Alternatively, the battery heat transfer component 10 can also be arranged in each space between unit modules.

[0075] The surface pressure pad 22 is a pad attached to secure the battery cell 20. Due to the adhesive force on its two surfaces, the battery cell 20 can be firmly secured, and when the battery cell 20 is separated, it can be removed with a small force. The surface pressure pad 22 can be made into a film by melting polyurethane (PU)-based or silicone-based resin, coating the film with the resin, and cooling the resin.

[0076] The surface pressure pad 22 can also be arranged in each space between battery cells 20, or in each space between every two battery cells 20. Furthermore, the surface pressure pad 22 can be arranged in each space between cell modules.

[0077] For example, an insulating coating can be applied to one surface of the battery heat transfer member 10. For example, one surface of the battery heat transfer member 10 can be arranged to contact the surface pressure pad 22.

[0078] Meanwhile, a curved surface contact portion 12 is formed at the lower end of the battery heat transfer member 10 to make surface contact with the interior portion of the TIM 30. The surface contact portion 12 can be configured to smoothly exchange heat with the TIM 30, which is formed to extend from the lower end of the battery heat transfer member 10 and bend in the vertical direction.

[0079] TIM 30 and cooling block 40 are arranged below battery cell 20 and are used to dissipate or cool the heat of battery cell 20.

[0080] As described above, the surface contact portion 12 of the battery heat transfer member 10 can be connected to the TIM 30 to dissipate heat by smoothly exchanging heat with the TIM 30. The surface contact portion 12 can contact and connect with the upper surface of the TIM 30, or be inserted into and connected to a groove formed in the upper surface of the TIM 30.

[0081] End plates 50 can be disposed on the front and rear ends of each of the stacked battery cells 20. The end plates 50 arranged as described above can support the outer side of the battery cells 20.

[0082] The cover 60 is used to cover the upper surface of the battery cell 20. The cover 60 can be formed of, for example, plastic or metal. However, the material of the cover 60 is not limited to these, and the cover 60 can use one of a variety of materials, not limited to those mentioned.

[0083] Figure 16 This is a diagram illustrating an example of a battery heat transfer component in a vehicle battery module according to an embodiment of the present invention; Figure 17This is a diagram illustrating another example of a battery heat transfer component in a vehicle battery module according to an embodiment of the present invention; and Figure 18 This is a diagram illustrating yet another example of a battery heat transfer component in a vehicle battery module according to an embodiment of the present invention.

[0084] refer to Figure 16 As described above, a surface contact portion 12 that makes surface contact with the TIM 30 is provided in the lower end of the battery heat transfer member 10. The end portion of the surface contact portion 12 may be formed to be curved and make surface contact with the TIM 30. In this case, the surface contact portion 12 may make surface contact with the surface of the TIM 30, or it may be inserted into the TIM 30 to make surface contact with the TIM 30.

[0085] refer to Figure 17 A surface contact portion 12 that makes surface contact with the TIM 30 is provided in the lower end of the battery heat transfer member 10. In this case, the linearly extending end portion of the surface contact portion 12 can directly contact the TIM 30 without having a surface contact like... Figure 16 The curved shape in the TIM 30. In this case, the surface contact portion 12 can make surface contact with the surface of the TIM 30, or it can be inserted into the TIM 30 to make surface contact with the TIM 30.

[0086] refer to Figure 18 The TIM 30 and cooling block 40 can be arranged not only below the battery cell 20 but also on the battery cell 20. Surface contact portions 12 that make surface contact with the TIM 30 are provided at the upper and lower ends of the battery heat transfer member 10. The end portions of the surface contact portions 12 extending towards the upper and lower portions of the battery heat transfer member 10 can be bent and make surface contact with the TIM 30. In this case, the surface contact portions 12 can make surface contact with the surface of the TIM 30, or they can be inserted into the TIM 30 to make surface contact with the TIM 30.

[0087] According to one embodiment of the present invention, by minimizing the increase in volume and weight of existing heat exchange components, the vehicle battery heat transfer components can stably maintain the temperature of the battery cells even during high-speed charging or high-power operation of the battery.

[0088] Furthermore, according to one embodiment of the present invention, since the bridging portion is provided on the cooling channel formed in the motherboard, the structure of the cooling channel can be stably supported.

[0089] Although the present invention has been described above with reference to exemplary embodiments, it will be understood by those skilled in the art that various modifications and changes can be made to the present invention without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A vehicle battery heat transfer component disposed between battery cells to transfer heat generated in the battery cells toward a cooling plate, the vehicle battery heat transfer component comprising: A motherboard having cooling channels formed therein, through which working fluid passes; as well as A cover plate, which is coupled to two opposite surfaces of the motherboard. A bridging portion is formed between the cooling channels in the motherboard, and the bridging portion connects the cooling channels in the width direction.

2. The vehicle battery heat transfer component according to claim 1, wherein, The bridging portion is arranged on an extension line in the longitudinal direction of the motherboard.

3. The vehicle battery heat transfer component according to claim 1, wherein, The cooling channel includes: The outer peripheral portion, which communicates with the injection section through which the working fluid is injected; and A capillary portion extends from each end portion of the outer peripheral portion and is formed to bend from both ends of the outer peripheral portion to form a closed loop inside the outer peripheral portion.

4. The vehicle battery heat transfer component according to claim 3, wherein, The bridging portion is formed in a single linear segment at the end portion of the capillary portion.

5. The vehicle battery heat transfer component according to claim 1, wherein, The cover plate is made of a covering material.

6. The vehicle battery heat transfer component according to claim 1, wherein: The injection section through which the working fluid is injected is located on one side of the mainboard; and A cap injection portion corresponding to the injection portion is provided on one side of each cap plate.

7. The vehicle battery heat transfer component according to claim 6, wherein, After the working fluid is injected through the injection section: The injection port is pressed against the cover plate on the opposite side to close the injection port; and An extrusion groove is formed on the surface of the cap injection section.

8. A vehicle battery module, comprising: Multiple battery cells stacked adjacent to each other. ； According to claim 1, the vehicle battery heat transfer component is arranged between the battery cells; A thermal interface material is disposed below the battery cell; as well as Cooling block, which is arranged below the thermal interface material.

9. The vehicle battery module according to claim 8, wherein, A surface contact portion is disposed in the battery heat transfer component, and the surface contact portion extends to maintain surface contact with the thermal interface material.

10. The vehicle battery module according to claim 9, wherein, The end portion of the surface contact portion is bent to maintain surface contact with the surface or interior portion of the thermal interface material.

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