Thermal management component and battery pack

Abstract

The embodiment of the utility model provides a thermal management component and a battery pack. The thermal management component comprises a liquid cooling plate and a plugging piece, the liquid cooling plate comprises a medium flow channel cavity and a non-medium flow channel cavity which are arranged at an interval in the first direction, and the medium flow channel cavity and the non-medium flow channel cavity penetrate through the liquid cooling plate in the second direction; the blocking piece is arranged in the non-medium flow channel cavity so as to block at least one end, in the second direction, of part of the non-medium flow channel cavity. By arranging the plugging piece in the non-medium flow channel cavity, plugging of the non-medium flow channel cavity can be realized, that is, when a cooling medium is introduced, circulation of the cooling medium in the non-medium flow channel cavity can be avoided, so that the overall weight of the liquid cooling plate is reduced, light weight of a battery pack is facilitated, the size of a heat management component can be reduced, and the heat management component is more compact. The space utilization rate of the battery pack is improved.

Description

Technical Field

[0001] The present application belongs to the field of battery technology, and specifically relates to a thermal management component and a battery pack. Background Art

[0002] Power batteries, such as lithium-ion batteries and sodium-ion batteries, are widely used in portable electronic devices, electric vehicles, energy storage devices and other fields due to their advantages of high energy density and good cycle performance. Taking electric vehicles as an example, the battery pack of an electric vehicle includes a box and a power battery disposed in the box. Since the power battery generates heat during use, causing the temperature of the battery pack to rise, it is necessary to set a thermal management component in the battery pack to reduce the temperature of the battery pack.

[0003] In the prior art, the thermal management component usually includes a liquid cooling plate, and the battery pack is cooled by heat exchange between the liquid cooling plate and the power battery. However, since the cross section of the liquid cooling plate is usually harmonica-shaped, that is, the liquid cooling plate includes multiple cavities arranged in parallel, when the cooling medium is introduced, the cooling medium will fill all the cavities, which will cause the weight of the liquid cooling plate to increase too much, which is not conducive to the lightweight of the battery pack. Utility Model Content

[0004] The present application aims to provide a thermal management component and a battery pack, so as to at least solve the problem that the weight of the existing liquid cooling plate increases too much after passing through the cooling medium, which is not conducive to the lightweight of the battery pack.

[0005] In order to solve the above technical problems, this application is implemented as follows:

[0006] In a first aspect, the present application discloses a thermal management component, the thermal management component comprising: a liquid cooling plate and a blocking member, the liquid cooling plate having a first direction, a second direction and a third direction intersecting in pairs;

[0007] The liquid cooling plate comprises a medium flow channel cavity and a non-medium flow channel cavity arranged at intervals along the first direction, and the medium flow channel cavity and the non-medium flow channel cavity are both arranged to penetrate the liquid cooling plate along the second direction;

[0008] The blocking member is disposed in the non-medium flow channel cavity to block at least one end of a portion of the non-medium flow channel cavity along the second direction.

[0009] Optionally, the blocking members are arranged at two ends of the non-medium flow channel cavity along the second direction to separate the medium flow channel cavity from the non-medium flow channel cavity.

[0010] Optionally, along the second direction, on the side of the plugging member facing away from the center of the non-medium flow channel cavity, it is flush with the end face of one end of the non-medium flow channel cavity; or, the plugging member is located between the two end faces of the non-medium flow channel cavity.

[0011] Optionally, the liquid cooling plate includes two side plates spaced along the third direction;

[0012] At least one of the side plates is provided with a through hole, the through hole communicates with the non-medium flow channel cavity, and the plugging member is arranged in the non-medium flow channel cavity and at least partially extends into the through hole.

[0013] Optionally, along the third direction, in a plane perpendicular to the third direction, the orthographic projection area of the plugging member is larger than the opening area of the through hole.

[0014] Optionally, there are multiple medium flow channel cavities distributed along the first direction, and the thermal management component further includes a current collector, and the current collector is arranged at one end or both ends of the liquid cooling plate along the second direction;

[0015] The current collector is provided with a second channel along the first direction;

[0016] The two ends of the second channel are arranged facing away from each other, and the two ends of the second channel are respectively connected to two adjacent medium flow channel cavities along the first direction, so that the cooling medium flows between the two adjacent medium flow channel cavities. Along the second direction, in a plane perpendicular to the second direction, the orthographic projection of the plugging member and the orthographic projection of the second channel at least partially overlap.

[0017] Optionally, the current collector is further provided with a first channel, the first channel and the second channel are spaced along the first direction, and the first channel communicates with at least one of the medium flow channel cavities.

[0018] Optionally, along the third direction, in a plane perpendicular to the third direction, the orthographic projection of the current collector and the orthographic projection of the plugging member are spaced along the second direction.

[0019] Optionally, the plugging member is a colloid.

[0020] In a second aspect, the present application also discloses a battery pack, and the battery pack includes: a box body, a plurality of battery cells, and a plurality of the above-mentioned thermal management components;

[0021] A plurality of the thermal management components are spaced along the third direction in the box body, at least one battery cell is arranged between two adjacent thermal management components, the thermal management components are thermally connected to the battery cells, and the plurality of thermal management components are communicated with each other.

[0022] Optionally, the liquid cooling plate is provided with through holes, the through holes communicate with the non-medium flow channel cavity, and the plugging member is disposed in the non-medium flow channel cavity and at least partially extends into the through holes;

[0023] In a plane perpendicular to the third direction along the third direction, the orthographic projection of the through hole and the orthographic projection of the battery cell are spaced apart along the second direction.

[0024] In the embodiment of the present application, since the thermal management component includes: a liquid cooling plate and a plugging member, the liquid cooling plate includes a medium flow channel cavity and a non-medium flow channel cavity that are spaced apart along the first direction, and both the medium flow channel cavity and the non-medium flow channel cavity penetrate the liquid cooling plate along the second direction; the plugging member is disposed in the non-medium flow channel cavity to block at least one end of a part of the non-medium flow channel cavity along the second direction. In this way, by arranging the plugging member in the non-medium flow channel cavity, the blocking of the non-medium flow channel cavity can be realized, that is, when the cooling medium is introduced, the cooling medium can be prevented from flowing in the non-medium flow channel cavity, so that the overall weight of the liquid cooling plate can be reduced, which is beneficial to the light weight of the battery pack. And, since the plugging member is located in the non-medium flow channel cavity, the space of the non-medium flow channel cavity can be fully utilized to arrange the plugging member to realize the plugging function, thereby reducing the size of the thermal management component along the second direction, and further improving the space utilization rate of the battery pack.

[0025] Additional aspects and advantages of the present utility model will be given in part in the following description, will become apparent in part from the following description, or will be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above and / or additional aspects and advantages of the present utility model will become apparent and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0027] Figure 1 is one of the structural schematic diagrams of a thermal management component provided by an embodiment of the present application;

[0028] Figure 2 is another structural schematic diagram of a thermal management component provided by an embodiment of the present application;

[0029] Figure 3 is one of the structural schematic diagrams of the liquid cooling plate of a thermal management component provided by an embodiment of the present application;

[0030] Figure 4 is another structural schematic diagram of the liquid cooling plate of a thermal management component provided by an embodiment of the present application;

[0031] Figure 5It is a schematic structural diagram of a battery pack provided by an embodiment of the present application.

[0032] Reference numerals: 1. Thermal management component, 11. Liquid cooling plate, 110. Medium flow channel cavity, 111. Non-medium flow channel cavity, 112. Side plate, 1121. Through hole, 113. Partition plate, 12. Plugging member, 121. Plugging portion, 122. Limiting portion, 13. Current collector, 131. First channel, 132. Second channel, 133. Groove, 2. Battery cell, 3. Box body, 4. Upper cover, X. First direction, Y. Second direction, Z. Third direction. Detailed implementation manners

[0033] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts belong to the scope protected by the present application.

[0034] The terms "first" and "second" in the description and claims of the present application may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "plurality" is two or more. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / " generally means an "or" relationship between the associated objects before and after.

[0035] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model.

[0036] In this application, the term "parallel" not only includes the case of absolute parallelism, but also includes the case of approximate parallelism commonly recognized in engineering. For example, "parallel" means that the angle formed by a straight line and a straight line, a straight line and a plane, or a plane and a plane is in the range of -1° to 1°. At the same time, "perpendicular" not only includes the case of absolute perpendicularity, but also includes the case of approximate perpendicularity commonly recognized in engineering. For example, "perpendicular" means that the angle formed by a straight line and a straight line, a straight line and a plane, or a plane and a plane is in the range of 89° to 91°. Equal distance or equal angle not only includes the case of absolute equality, but also includes the case of approximate equality commonly recognized in engineering, that is, a certain error can exist, such as a tolerance range in the state of -1% to 1%.

[0037] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0038] The embodiment of the present application provides a thermal management component. The thermal management component of the present application will be described in detail below with reference to the accompanying drawings.

[0039] Refer to Figures 1 to 2 , which shows a schematic structural diagram of a thermal management component provided by an embodiment of the present application. Refer to Figures 3 to 4 , which shows a schematic structural diagram of a liquid cooling plate of a thermal management component provided by an embodiment of the present application.

[0040] As Figures 1 to 2 shown, the present application provides a thermal management component 1, including: a liquid cooling plate 11 and a plugging member 12. The liquid cooling plate 11 has a first direction X, a second direction Y, and a third direction Z that intersect pairwise; the liquid cooling plate 11 includes a medium flow channel cavity 110 and a non-medium flow channel cavity 111 that are arranged at intervals along the first direction X. Both the medium flow channel cavity 110 and the non-medium flow channel cavity 111 penetrate the liquid cooling plate 11 along the second direction Y; the plugging member 12 is arranged in the non-medium flow channel cavity 111 to block at least one end of the non-medium flow channel cavity 111 along the second direction Y with a blocking portion 121.

[0041] In the embodiment of the present application, by setting a blocking piece 12 in the non-medium flow channel cavity 111, the blocking of the non-medium flow channel cavity 111 can be achieved. That is, when the cooling medium is introduced, the cooling medium can be prevented from circulating in the non-medium flow channel cavity 111, so that the overall weight of the liquid cooling plate 11 can be reduced, which is beneficial to the lightweight of the battery pack. In addition, since the blocking piece 12 is located in the non-medium flow channel cavity 111, the space of the non-medium flow channel cavity 111 can be fully utilized to set the blocking piece 12 to achieve the blocking function, thereby reducing the space occupied by the blocking piece 12, reducing the size of the thermal management component along the second direction Y, and further reducing the space occupied when the thermal management component is assembled in the battery pack, so as to improve the space utilization rate of the battery pack. Furthermore, the corresponding cavity wall of the non-medium flow channel cavity 111 can still exchange heat with the corresponding battery cell 2, so as to transfer the heat to the corresponding cooling medium in the medium flow channel cavity 110, thereby ensuring the overall heat exchange effect of the battery pack.

[0042] It should be noted that the medium flow channel cavity 110 in the embodiment of the present application refers to a cavity through which the cooling medium can flow, and the non-medium flow channel cavity 111 refers to a cavity through which the cooling medium cannot flow, wherein the cooling medium includes but is not limited to water ethylene glycol (a mixture of water and ethylene glycol), which can exchange heat with the battery cells 2 in the battery pack to take away the heat generated by the battery cells 2. The embodiment of the present application does not limit the number of medium flow channel cavities 110 and non-medium flow channel cavities 111, and those skilled in the art can adjust them according to actual needs. In one embodiment, Figure 2 and Figure 4 As shown, three medium flow channel cavities 110 are provided, four non-medium flow channel cavities 111 are provided, and the medium flow channel cavities 110 and the non-medium flow channel cavities 111 are alternately arranged in sequence along the first direction X. In addition, the first direction X, the second direction Y, and the third direction Z are preferably perpendicular to each other. Specifically, in the embodiment of the present application, the first direction X is the width direction of the liquid cooling plate 11, the second direction Y is the length direction of the liquid cooling plate 11, and the third direction Z is the thickness direction of the liquid cooling plate 11, and the first direction X, the second direction Y, and the third direction Z are perpendicular to each other.

[0043] In some optional embodiments of the present application, the blocking members 12 are disposed at both ends of the non-medium flow channel cavity 111 along the second direction Y to separate the medium flow channel cavity 110 from the non-medium flow channel cavity 111 .

[0044] In the embodiment of the present application, by providing the blocking members 12 at both ends of the non-medium flow channel cavity 111, a closed cavity can be formed in the non-medium flow channel cavity 111 between the two blocking members 12, that is, the cooling medium cannot flow into one end of the non-medium flow channel cavity 111 along the second direction Y and flow out from the other end, thereby separating the medium flow channel cavity 110 from the non-medium flow channel cavity 111, which is beneficial to reducing the overall weight of the liquid cooling plate 11.

[0045] It should be noted that the embodiment of the present application does not limit the specific positions of the blocking members 12 in the non-medium flow channel cavity 111, and those skilled in the art can adjust according to actual needs. It can be understood that as the distance between the two blocking members 12 increases, the enclosed space of the non-medium flow channel cavity 111 becomes larger, that is, the space for the cooling medium to flow in the liquid cooling plate 11 becomes smaller, thereby further reducing the overall weight of the liquid cooling plate 11.

[0046] Based on this, in some alternative embodiments of the present application, along the second direction Y, the side of the blocking member 12 facing away from the center of the non-medium flow channel cavity 111 is flush with one end face of the non-medium flow channel cavity 111. In this way, when the side of the blocking member 12 facing away from the center of the non-medium flow channel cavity 111 is flush with the end face of the non-medium flow channel cavity 111 while the external dimensions of the blocking member 12 remain unchanged, complete blocking of the non-medium flow channel cavity 111 can be achieved, and no space will be left in the non-medium flow channel cavity 111 for the cooling medium to enter the corresponding space of the non-medium flow channel cavity 111, that is, the enclosed space of the non-medium flow channel cavity 111 is maximized, which is beneficial to further reducing the overall weight of the liquid cooling plate 11.

[0047] Or, in some other embodiments, along the second direction Y, the blocking member 12 is located between the two end faces of the non-medium flow channel cavity 111. At this time, the blocking member 12 is still inside the non-medium flow channel cavity 111, but there is a certain gap between the blocking member 12 and the end face of the non-medium flow channel cavity 111. Since the blocking member 12 can generally be made of a thermoplastic material or a colloid, this can avoid the risk of excessive use of the blocking member 12 and wrongly blocking the medium flow channel cavity 110, thereby ensuring the heat exchange effect of the liquid cooling plate 11.

[0048] It should be noted that the liquid cooling plate 11 includes two side plates 112 spaced along the third direction Z, that is, the thickness direction of the liquid cooling plate 11, and a plurality of partition plates 113 spaced along the first direction X, that is, the width direction of the liquid cooling plate 11, are provided between the two side plates 112. Cavities are formed by enclosing adjacent two partition plates 113 and the two side plates 112, and the cavities are used as the medium flow channel cavity 110 or the non-medium flow channel cavity 111. The end face of the non-medium flow channel cavity 111 may refer to the end face formed by the end of the side plate 112 and the end of the partition plate 113.

[0049] In some alternative embodiments of the present application, as Figures 3 to 4 shown, the liquid cooling plate 11 includes two side plates 112 spaced along the third direction Z; at least one side plate 112 is provided with a through hole 1121, and the through hole 1121 communicates with the non-medium flow channel cavity 111. The plugging member 12 is disposed in the non-medium flow channel cavity 111 and at least partially extends into the through hole 1121.

[0050] In the embodiments of the present application, on the one hand, by providing the through hole 1121 communicating with the non-medium flow channel cavity 111 on at least one side plate 112, it is convenient to install the plugging member 12 into the non-medium flow channel cavity 111 from the through hole 1121 to realize the plugging of the non-medium flow channel. On the other hand, since at least a part of the plugging member 12 extends into the through hole 1121, that is, at least a part of the plugging member 12 can abut against the hole wall of the through hole 1121, the plugging member 12 can be limited, avoiding the problem that the plugging member 12 is displaced when the cooling medium impacts the plugging member 12. In one embodiment, as Figure 1 shown, the plugging member 12 includes a plugging portion 121 and a limiting portion 122. The plugging portion 121 and the limiting portion 122 are generally integrally formed structures. The plugging portion 121 is embedded in the non-medium flow channel cavity 111 to realize the plugging of the non-medium flow channel cavity 111, and the limiting portion 122 is embedded in the through hole 1121 to assist in limiting the plugging portion 121.

[0051] It should be noted that the shape of the through hole 1121 includes but is not limited to a circular hole, a waist-shaped hole, a square hole, a triangular hole, etc. Those skilled in the art can adjust according to actual needs. It can be understood that when a circular hole or a waist-shaped hole is adopted, since there is no stress sharp corner in the through hole 1121, stress concentration can be avoided, which is beneficial to improving the structural strength of the side plate 112. In addition, the drawings of the embodiments of the present application only show the case where the through hole 1121 is provided on one side plate 112. In actual applications, those skilled in the art can also disperse the through holes 1121 on the two side plates 112. It can be understood that when the through hole 1121 is provided on one side plate 112, the structure of the liquid cooling plate 11 can be simplified and the processing is facilitated. In one embodiment, the liquid cooling plate 11 includes four non-medium flow channel cavities 111 spaced along the first direction X. Four through holes 1121 are respectively provided at both ends of one side plate 112 along the second direction Y, and one through hole 1121 communicates with one non-medium flow channel cavity 111; two plugging members 12 are provided in each non-medium flow channel cavity 111, and one plugging member 12 corresponds to the position of one through hole 1121 and at least partially extends into the through hole 1121.

[0052] It should be noted that the thermal management component 1 of the embodiments of the present application is applicable not only to square battery cells 2 but also to cylindrical battery cells 2, without limitation here. Those skilled in the art can adjust according to actual needs. It can be understood that when the battery cell 2 is square, the side plate 112 of the embodiments of the present application can be a flat plate structure; when the battery cell 2 is cylindrical, the side plate 112 of the embodiments of the present application can be a curved structure, thereby improving the versatility of the thermal management component 1.

[0053] In some alternative embodiments of the present application, the plugging member 12 is a colloid, such as made of silicone material. On the one hand, since the colloid material is light in weight, it can reduce the weight of the liquid cooling plate 11. On the other hand, the structure of the colloid is simple and welding is not required. The colloid can be directly injected into the non-media flow channel cavity 111 to achieve plugging, which can simplify the processing technology and cost of the liquid cooling plate 11. Moreover, the colloid has a certain elasticity and can better abut against the inner wall of the non-media flow channel cavity 111 to achieve good plugging performance. In addition, since the colloid is arranged inside the non-media flow channel cavity 111, that is, it does not need to additionally occupy the space of the liquid cooling plate 11 along the second direction Y, that is, the length direction of the liquid cooling plate 11, the space utilization rate of the liquid cooling plate 11 can be improved. The plugging member can also be made of other thermoplastic materials or other elastic members, which are not specifically limited here.

[0054] It should be noted that the thermoplastic material of the embodiments of the present application refers to being pre-processed and formed by injection molding or other processes. When using an elastic member, during the assembly process of the thermal management component 1, since the elastic member can undergo elastic deformation, the staff can squeeze and insert the elastic member into the non-media flow channel cavity 111 from the through hole 1121 or the end of the non-media flow channel cavity 111. When the elastic member is installed in place, the elastic member returns to its initial form to abut against at least part of the inner wall of the non-media flow channel cavity 111, that is, the side plate 112 and the partition plate 113, so as to reliably plug the non-media flow channel cavity 111. The colloid of the embodiments of the present application refers to the plugging member 12 that is injected into the non-media flow channel cavity 111 through a glue injection process and solidifies and forms. During the assembly process of the thermal management component 1, the staff can inject glue from the through hole 1121 or the end of the non-media flow channel cavity 111 to make the colloid contact at least part of the inner wall of the non-media flow channel cavity 111, that is, the side plate 112 and the partition plate 113. After the colloid is cured and formed, the non-media flow channel cavity 111 can be reliably plugged.

[0055] In some alternative embodiments of the present application, in a plane perpendicular to the third direction Z along the third direction Z, the orthographic projection area of the plugging member 12 is larger than the opening area of the through hole 1121.

[0056] In the embodiment of the present application, since the orthographic projection area of the plugging member 12 in a plane perpendicular to the third direction Z along the third direction Z is larger than the opening area of the through hole 1121, that is, the through hole 1121 is located within the projection range of the plugging member 12. In this way, the plugging member 12 can effectively plug the through hole 1121, avoiding the outflow of the cooling medium from the gap between the plugging member 12 and the through hole 1121, which is beneficial to improving the use safety of the single battery.

[0057] In some alternative embodiments of the present application, as Figure 1 shown, the medium flow channel cavity 110 has a plurality of them and is distributed along the first direction X. The thermal management component 1 further includes a current collector 13, and the current collector 13 is arranged at one end or both ends of the liquid cooling plate 11 along the second direction Y; the current collector 13 is provided with a first channel 131 and a second channel 132 that are spaced apart along the first direction X; the first channel 131 is communicated with at least one medium flow channel cavity 110 to enable the cooling medium to flow into or out of the medium flow channel cavity 110; the two ends of the second channel 132 are arranged to face away from each other, and the two ends of the second channel 132 are respectively connected to two adjacent medium flow channel cavities 110 along the first direction X to enable the cooling medium to flow between the two adjacent medium flow channel cavities 110. Along the second direction Y, in a plane perpendicular to the second direction Y, the orthographic projection of the plugging member 12 and the orthographic projection of the second channel 132 at least partially overlap. It can be understood that there is a non-medium flow channel cavity 111 between two adjacent medium flow channel cavities 110, and the second channel 132 straddles the non-medium flow channel cavity 111 to connect the two medium flow channel cavities 110.

[0058] In the embodiment of the present application, due to the provision of the current collector 13, the current collector 13 includes a first channel 131 and a second channel 132. Among them, the first channel 131 is communicated with at least one medium flow channel cavity 110, and the second channel 132 is communicated with two adjacent medium flow channel cavities 110. In this way, on the one hand, since the first channel 131 is communicated with at least one medium flow channel cavity 110, the cooling medium can flow into or out of the medium flow channel cavity 110, and the heat generated by the battery cell 2 can be continuously carried away through the flow of the cooling medium, which is beneficial to improving the heat dissipation effect of the battery cell 2. On the other hand, since the second channel 132 is communicated with two adjacent medium flow channel cavities 110, an S-shaped flow channel can be formed inside the liquid cooling plate 11, which is beneficial to improving the heat dissipation performance of the liquid cooling plate 11.

[0059] In practical applications, the battery pack further includes an external thermal management system. The external thermal management system is connected to the first channel 131 to form a circulation loop of the cooling medium, so as to realize the circulating flow of the cooling medium. Specifically, the external thermal management system includes an inlet pipe and an outlet pipe. The thermal management component 1 usually includes two first channels 131. One of the first channels 131 is connected to the inlet pipe, and the other first channel 131 is connected to the outlet pipe, thereby forming a circulation loop of the cooling medium. In one embodiment, as Figure 2 shown, the thermal management component 1 is provided with two current collectors 13, namely a first current collector located at the left end of the liquid cooling plate 11 and a second current collector located at the right end of the liquid cooling plate 11. Among them, the first current collector and the second current collector are centrosymmetric with respect to the center point of the liquid cooling plate 11. The first current collector includes a first channel 131 and a second channel 132 arranged at intervals from top to bottom. The second current collector includes a second channel 132 and a first channel 131 arranged at intervals from top to bottom. The liquid cooling plate 11 includes a first medium flow channel cavity, a second medium flow channel cavity, and a third medium flow channel cavity distributed in sequence from top to bottom. The first channel 131 of the first current collector is connected to the right end of the first medium flow channel cavity. The second channel 132 of the first current collector is respectively connected to the right ends of the second medium flow channel cavity and the third medium flow channel cavity. The second channel 132 of the second current collector is respectively connected to the left ends of the first medium flow channel cavity and the second medium flow channel cavity. The first channel 131 of the second current collector is connected to the left end of the third medium flow channel cavity, thereby forming an S-shaped flow channel for the cooling medium to flow through.

[0060] It should be noted that the drawings in the embodiments of the present application only show the case where the current collector 13 is arranged at both ends of the liquid cooling plate 11 along the second direction Y. In practical applications, those skilled in the art can also arrange the current collector 13 only at one end of the liquid cooling plate 11 along the second direction Y. In this case, the current collector 13 is usually provided with at least two first channels 131. One first channel 131 is used for the cooling medium to flow into the medium flow channel cavity 110, and the other first channel 131 is used for the cooling medium to flow out, so as to realize the circulating flow of the coolant.

[0061] In some alternative embodiments of the present application, along the third direction Z and in a plane perpendicular to the third direction Z, the orthographic projection of the current collector 13 and the orthographic projection of the plugging member 12 are arranged at intervals along the second direction Y.

[0062] In practical applications, the current collector 13 and the liquid cooling plate 11 are usually connected by welding, and a large amount of heat is generated during the welding process. Based on this, the orthographic projection of the current collector 13 and the orthographic projection of the plugging member 12 are arranged at intervals in the second direction Y, that is, the current collector 13 and the plugging member 12 are arranged offset in the second direction Y. In this way, on the one hand, since the current collector 13 and the plugging member 12 are arranged offset in the second direction Y, that is, there is a certain distance between the current collector 13 and the plugging member 12. When the plugging member 12 is installed before assembling the current collector 13, the possibility of damage to the plugging member 12 can be reduced, which is beneficial to improving the plugging effect of the plugging member 12. On the other hand, since the current collector 13 and the plugging member 12 are arranged offset in the second direction Y, that is, the current collector 13 does not block the through hole 1121 corresponding to the position of the plugging member 12, so the plugging member 12 can be installed after assembling the current collector 13, which can avoid the plugging member 12 from melting and is beneficial to improving the plugging effect of the plugging member 12.

[0063] In a specific application, a groove 133 is provided at one end of the current collector 13 close to the liquid cooling plate 11. By embedding at least part of the liquid cooling plate 11 in the groove 133, a reliable connection between the current collector 13 and the liquid cooling plate 11 can be achieved. Wherein, the groove 133 communicates with the first channel 131 and the second channel 132. When the liquid cooling plate 11 is embedded in the groove 133, the first channel 131 communicates with at least one medium flow channel cavity 110, and the second channel 132 communicates with two adjacent medium flow channel cavities 110.

[0064] In summary, the thermal management component provided by the embodiment of the present application has at least the following advantages:

[0065] In the embodiment of the present application, since the thermal management component includes: a liquid cooling plate and a plugging member, the liquid cooling plate includes a medium flow channel cavity and a non-medium flow channel cavity arranged at intervals in the first direction, and both the medium flow channel cavity and the non-medium flow channel cavity penetrate through the liquid cooling plate in the second direction; the plugging member is arranged in the non-medium flow channel cavity to plug at least one end of the non-medium flow channel cavity in the second direction. In this way, by arranging the plugging member in the non-medium flow channel cavity, the plugging of the non-medium flow channel cavity can be realized. That is, when the cooling medium is introduced, the cooling medium can be prevented from flowing in the non-medium flow channel cavity, so that the overall weight of the liquid cooling plate can be reduced, which is beneficial to the lightweight of the battery pack. And, since the plugging member is located in the non-medium flow channel cavity, the space of the non-medium flow channel cavity can be fully utilized to arrange the plugging member to realize the plugging function, thereby reducing the size of the thermal management component in the second direction, and further improving the space utilization rate of the battery pack.

[0066] Refer to Figure 5 , which shows a schematic structural diagram of a battery pack provided by the embodiment of the present application, as Figure 5As shown in the figure, an embodiment of the present application further provides a battery pack, which includes: a box body 3, a plurality of battery cells 2, and the thermal management component 1 of any one of the above embodiments; the plurality of thermal management components 1 are arranged at intervals in the box body 3 along the third direction Z, at least one battery cell 2 is arranged between two adjacent thermal management components 1, the thermal management component 1 is thermally connected to the battery cell 2, and the plurality of thermal management components 1 are communicated with each other.

[0067] In the embodiment of the present application, since a plurality of thermal management components 1 that can be thermally connected to the battery cells 2 are arranged in the battery pack, wherein the liquid cooling plate 11 of the thermal management component 1 includes a non-medium flow channel cavity 111 blocked by a blocking member 12. In this way, when the cooling medium is introduced, it is possible to avoid the cooling medium from flowing in the non-medium flow channel cavity 111, which can not only adjust the temperature of the single battery, but also reduce the overall weight of the thermal management component 1, which is beneficial to the lightweight of the battery pack.

[0068] It should be noted that in the embodiment of the present application, the structure of the thermal management component 1 is the same as that of the thermal management component 1 in any of the above embodiments, and its beneficial effects are similar, so details are not described here. In addition, the battery pack further includes an upper cover 4, and the upper cover 4 covers the box body 3 to protect components such as the thermal management component 1 and the battery cells 2 located in the box body 3.

[0069] In some alternative embodiments of the present application, the liquid cooling plate 11 is provided with through holes 1121, the through holes 1121 are communicated with the non-medium flow channel cavity 111, the blocking member 12 is arranged in the non-medium flow channel cavity 111 and at least partially extends into the through holes 1121; along the third direction Z, in a plane perpendicular to the third direction Z, the orthographic projection of the through holes 1121 is spaced from the orthographic projection of the battery cells 2 along the second direction Y.

[0070] In practical applications, the battery cells 2 will undergo thermal expansion during use. The thermal management components 1 located on both sides of the battery cells 2 can absorb the thermal expansion of the battery cells 2, thereby improving the service life of the battery cells 2. Based on this, by arranging the orthographic projection of the through holes 1121 and the orthographic projection of the battery cells 2 to be spaced along the second direction Y, that is, arranging the through holes 1121 and the battery cells 2 to be misaligned along the second direction Y. In this way, the through holes 1121 can be avoided from the battery cells 2. When the battery cells 2 undergo thermal expansion, the expansion force will not directly act on the through holes 1121 with relatively small structural strength, thereby avoiding deformation of the liquid cooling plate 11 and being beneficial to improving the limiting reliability of the thermal management component 1 to the battery cells 2.

[0071] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0072] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A thermal management component, characterized in that: The thermal management component comprises: a liquid cooling plate and a blocking member, wherein the liquid cooling plate has a first direction, a second direction and a third direction intersecting in pairs; The liquid cooling plate comprises a medium flow channel cavity and a non-medium flow channel cavity arranged at intervals along the first direction, and the medium flow channel cavity and the non-medium flow channel cavity are both arranged to penetrate the liquid cooling plate along the second direction; The blocking member is disposed in the non-medium flow channel cavity to block at least one end of a portion of the non-medium flow channel cavity along the second direction.

2. The thermal management component according to claim 1, characterized in that: The blocking members are arranged at two ends of the non-medium flow channel cavity along the second direction to separate the medium flow channel cavity from the non-medium flow channel cavity.

3. The thermal management component according to claim 1, characterized in that: Along the second direction, the side of the blocking member away from the center of the non-medium flow channel cavity is flush with the end surface of one end of the non-medium flow channel cavity; or, the blocking member is located between the two end surfaces of the non-medium flow channel cavity.

4. The thermal management component according to claim 1, characterized in that: The liquid cooling plate comprises two side plates spaced apart along the third direction; At least one of the side plates is provided with a through hole, the through hole is communicated with the non-medium flow channel cavity, and the blocking member is disposed in the non-medium flow channel cavity and at least partially extends to the through hole.

5. The thermal management component according to claim 4, characterized in that: Along the third direction and on a plane perpendicular to the third direction, an orthographic projection area of ​​the blocking member is larger than an opening area of ​​the through hole.

6. The thermal management component according to claim 1, characterized in that: The medium flow channel cavities have a plurality of cavities and are distributed along the first direction. The thermal management component further includes a current collector, and the current collector is arranged at one end or both ends of the liquid cooling plate along the second direction. The current collector is provided with a second channel extending along the first direction; The second channel includes two ends arranged away from each other, and the two ends of the second channel are respectively connected to two adjacent medium flow channel cavities along the first direction, so that the cooling medium flows between the two adjacent medium flow channel cavities, and along the second direction on a plane perpendicular to the second direction, the orthographic projection of the blocking member at least partially overlaps with the orthographic projection of the second channel.

7. The thermal management component according to claim 6, characterized in that: The current collector is further provided with a first channel, the first channel and the second channel are spaced apart and distributed along the first direction, and the first channel is connected to at least one of the medium flow channel cavities.

8. The thermal management component according to claim 6, characterized in that: Along the third direction and on a plane perpendicular to the third direction, an orthographic projection of the current collector and an orthographic projection of the blocking member are spaced apart along the second direction.

9. The thermal management component according to claim 1, characterized in that: The blocking member is a colloid.

10. A battery pack, characterized in that: The battery pack comprises: a box body, a plurality of battery cells, and a plurality of thermal management components according to any one of claims 1 to 9; A plurality of the thermal management components are arranged in the box at intervals along the third direction, at least one battery cell is arranged between two adjacent thermal management components, the thermal management components are thermally connected to the battery cells, and the plurality of thermal management components are connected.

11. The battery pack according to claim 10, characterized in that: The liquid cooling plate is provided with a through hole, the through hole is communicated with the non-medium flow channel cavity, and the blocking member is provided in the non-medium flow channel cavity and at least partially extends to the through hole; Along the third direction and on a plane perpendicular to the third direction, an orthographic projection of the through hole and an orthographic projection of the battery cell are spaced apart from each other along the second direction.

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