Thermal management assembly, thermal management system and battery pack

Abstract

The utility model provides a thermal management assembly, a thermal management system and a battery pack, and relates to the technical field of batteries. The heat management assembly comprises a heat management component, a plurality of flow channels are arranged in the heat management component, the area of the overflowing cross section of each flow channel is the area B, the lengths of the flow channels are at least partially different, and the area B is in positive correlation with the length of the flow channel corresponding to the area B. The area B of the overflowing section of the flow channel is set to be of a structure which is in positive correlation with the length of the flow channel, so that the flow resistance of the flow channel with the shorter length is increased, the flow resistance difference of all the flow channels is small, and the flow uniformity of all the flow channels can be improved. Therefore, the uniformity of the thermal management effect of the thermal management assembly on the battery cell can be improved.

Description

Technical Field

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

[0002] In the related art, the battery includes a battery box and a battery module and a thermal management component arranged in the battery box. Among them, the battery module includes a plurality of battery cell rows arranged in sequence, and each battery cell row includes a plurality of battery cells arranged in sequence. The thermal management component includes a thermal management component thermally coupled to the battery cell. A plurality of flow channels for the circulation of heat exchange medium are arranged in the thermal management component. Usually, the flow channels extend along the arrangement direction of the battery cells in the battery cell row, and the liquid inlet end of each hot flow channel is connected to the same main liquid inlet pipe, and the liquid outlet end of each flow channel is connected to the same inlet and outlet pipe. The pipeline transports the heat exchange medium to each flow channel to perform heat exchange on the battery cell, thereby completing the temperature management of the battery cell so that the battery cell is within the normal operating temperature.

[0003] In some battery pack installation environments with limited space, in order to increase the energy density of the battery pack, the arrangement of the cells needs to be adapted to the space, resulting in inconsistent numbers of cells in some cell columns, which in turn leads to differences in the length of the flow channels used for heat exchange with each cell column. The longer the length of the flow channel, the greater the flow resistance of the flow channel to the heat exchange medium. Since the liquid inlet ends of each flow channel are connected to the same main liquid inlet pipe, the heat exchange medium will mainly flow to the flow channel with smaller flow resistance, which will result in the longer flow channel having poorer temperature management effect on the cell column. As a result, the thermal management effect of the thermal management component on each cell column varies greatly. Utility Model Content

[0004] The embodiments of the present application provide a thermal management component, a thermal management system and a battery pack, which can improve the problem that the thermal management effects of the thermal management component on each battery cell column vary greatly.

[0005] In a first aspect, an embodiment of the present application provides a thermal management component, which includes a thermal management component, in which a plurality of flow channels are arranged, the area of ​​the flow cross-section of the flow channel is area B, the lengths of the plurality of flow channels are at least partially different, and area B is positively correlated with the lengths of the corresponding flow channels.

[0006] In one embodiment, the flow channel includes a main body and a cut-off structure arranged on the main body, the area of ​​the flow cross-section of the main body is area A, the areas A of multiple flow channels are equal, area B is the flow cross-section of the cut-off structure, and satisfies: area A ≥ area B.

[0007] In one embodiment, the thermal management component includes a plurality of thermal management plates, and the plurality of flow channels are arranged in a one-to-one correspondence with the plurality of thermal management plates.

[0008] In one embodiment, the thermal management plate includes a plate body and a first end plate, a first slot is provided on the first end plate, and the first end of the plate body is sealed and plugged into the first slot; the body includes a liquid inlet channel and a liquid outlet channel, the liquid inlet channel and the liquid outlet channel are arranged in parallel on the plate body, one end of the liquid inlet channel and one end of the liquid outlet channel are both connected to the first slot; wherein, a cut-off wall is provided at the first end of the plate body, the cut-off wall is located between the liquid inlet channel and the liquid outlet channel, and the cut-off wall and the inner wall of the first slot define a cut-off structure.

[0009] In one embodiment, there is a distance d between the intercepting wall and the bottom of the first slot. For different heat management plates, the distance d is positively correlated with the length of the corresponding flow channel.

[0010] In one embodiment, the thermal management plate also includes a second end plate, the second end plate is provided with a second slot, a partition plate is provided in the second slot, and the partition plate divides the second slot into a liquid inlet slot and a liquid outlet slot; the plate body has a second end opposite to the first end, and the second end is sealed and plugged into the second slot; the other end of the liquid inlet channel and the other end of the liquid outlet channel are respectively connected to the liquid inlet slot and the liquid outlet slot, and a liquid inlet port and a liquid outlet port respectively connected to the liquid inlet slot and the liquid outlet slot are provided on the outer wall of the second end plate.

[0011] In one embodiment, a plurality of partition plates are provided in the liquid inlet channel, and the plurality of partition plates divide the liquid inlet channel into a plurality of independent liquid inlet sub-channels, one end of each of the plurality of liquid inlet sub-channels is connected to one side of the first slot, and the other end of each of the plurality of liquid inlet sub-channels is connected to the liquid inlet groove; a plurality of partition plates are provided in the liquid outlet channel, and the plurality of partition plates divide the liquid outlet channel into a plurality of independent liquid outlet sub-channels, one end of each of the plurality of liquid outlet sub-channels is connected to the other side of the first slot, and the other end of each of the plurality of liquid outlet sub-channels is connected to the liquid outlet groove.

[0012] In one embodiment, the lengths of the flow channels are L1, L2, ..., L n The distances between the intercepting wall and the bottom of the first slot are d1, d2, ..., d n , n is a natural number, and n ≥ 2, the length is L n In the flow channel, d n =d1+δ n ; Among them, the value of δ is obtained by simulation based on factors such as the fluid viscosity of the medium in the flow channel, the flow channel structure shape, the roughness of the flow channel wall, and the flow velocity.

[0013] In one embodiment, the two ends of the flow channel are respectively a liquid inlet port and a liquid outlet port, the thermal management component also includes a liquid inlet series pipe and a liquid outlet series pipe, a plurality of thermal management plates are arranged side by side in sequence, and a liquid inlet series pipe and a liquid outlet series pipe are arranged between two adjacent thermal management plates, the two ends of the liquid inlet series pipe are respectively connected to the liquid inlet ports of the flow channel on the adjacent thermal management plates, the two ends of the liquid outlet series pipe are respectively connected to the liquid outlet ports of the flow channel on the two adjacent thermal management plates, a main liquid inlet is provided on a liquid inlet series pipe or a thermal management plate, and a main liquid outlet is provided on a liquid outlet series pipe or a thermal management plate.

[0014] In one embodiment, the liquid inlet series pipeline includes an intermediate tube and an end tube, there are two end tubes, and the two ends of the end tubes are respectively a third end and a fourth end; the third end of each end tube is plugged into one end of the intermediate tube, and the fourth end of each end tube is connected to the liquid inlet port of the flow channel on the adjacent thermal management plate, and the structure of the liquid outlet series pipeline is the same as that of the liquid inlet series pipeline.

[0015] In one embodiment, the liquid inlet series pipeline also includes a flexible sealing bushing, the first end of the end pipe is inserted into the middle pipe, the flexible sealing bushing is arranged in the middle pipe and is located between the end pipe and the middle pipe, the flexible sealing bushing is radially compressed, and the structure of the liquid outlet series pipeline is the same as the structure of the liquid inlet series pipeline.

[0016] In one embodiment, the flexible sealing bushing is clamped with the intermediate pipe along the radial direction of the intermediate pipe.

[0017] In one embodiment, a stopper is provided on the outer circumferential surface of the flexible sealing bushing, a limiting hole is provided on the intermediate tube, and the stopper is inserted into the limiting hole.

[0018] In one embodiment, the outer peripheral surface of the end tube near the first end is a conical surface, the small diameter end of the conical surface is located at the end of the end tube away from the heat management plate connected thereto, and the large diameter end of the conical surface is interference fit with the middle tube.

[0019] In one embodiment, both ends of the intermediate tube are bell-shaped, and both ends of the flexible sealing bushing extend to the bell-shaped at both ends of the intermediate tube respectively and fit with the wall surface of the bell-shaped.

[0020] In one embodiment, the thermal management component is applied to a battery module, which includes a plurality of battery cell columns arranged in sequence, a plurality of thermal management plates are arranged in sequence along the arrangement direction of the plurality of battery cell columns, and a gap for placing the battery cell columns is formed between two adjacent thermal management plates.

[0021] In one embodiment, the extension directions of the multiple flow channels are consistent, and the multiple flow channels are arranged in sequence and spaced apart along a direction perpendicular to the extension direction of the flow channels. The multiple flow channels are symmetrically distributed on the thermal management component along a first center line, and the first center line is parallel to the extension direction of the flow channels.

[0022] In the second aspect, an embodiment of the present application provides a thermal management system, which includes a temperature management module, a main liquid inlet pipe, a main liquid outlet pipe, a hydraulic pump and the aforementioned thermal management components, and the flow channel is filled with a heat exchange medium; the temperature management module is used to perform temperature management on the heat exchange medium; the two ends of the main liquid inlet pipe are respectively connected to the temperature management module and one end of the flow channel; the two ends are respectively connected to the temperature management module and the other end of the flow channel; the hydraulic pump is used to drive the flow of the heat exchange medium.

[0023] In one embodiment, the thermal management system also includes a pipeline connection structure, which includes a first pipe joint, a second pipe joint and a limiting structure; the first end of the second pipe joint is plugged into one end of the first pipe joint, and the outer surface of the second pipe joint is provided with a first matching structure; one end of the limiting structure is connected to the outer peripheral surface of the first pipe joint, and the other end is provided with a second matching structure; along the plug-in direction, the second matching structure and the first matching structure are stop-matched, and along the plug-in direction, the second matching structure and the first matching structure are gap-matched; wherein, the main liquid inlet pipe is connected to one end of the flow channel through the pipeline connection structure, and the main liquid outlet pipe is connected to the other end of the flow channel through the pipeline connection structure.

[0024] In one embodiment, the first mating structure is a first boss, the second mating structure is a second boss, and the second boss is located on the side of the first boss away from the first end; wherein, the end of the second pipe joint connected to the first pipe joint is the first end, the second pipe joint has a first end face located at the first end, and the limiting structure has a first surface arranged opposite to the first end face; the distance between the side of the second boss close to the first boss and the first surface is L1, and the distance between the side of the first boss close to the second boss and the first end face is L2, satisfying: L1>L2.

[0025] In one embodiment, the port where the main liquid inlet pipe communicates with the flow channel is a first flow channel port, and the main liquid inlet pipe has two first flow channel ports, and the two first flow channel ports are respectively connected to one end of the two flow channels through two pipeline connection structures;

[0026] The port where the main liquid outlet pipe is connected to the flow channel is the second flow channel port. The main liquid outlet pipe has two second flow channel ports, and the two second flow channel ports are respectively connected to the other ends of the two flow channels through two pipeline connection structures.

[0027] In one embodiment, a portion of the main liquid inlet pipe located between the two first flow channel openings is connected to a pipeline connection structure, and a portion of the main liquid outlet pipe located between the two second flow channel openings is connected to a pipeline connection structure.

[0028] In a third aspect, an embodiment of the present application further provides a battery pack, which includes the aforementioned thermal management system.

[0029] Beneficial effects of the embodiments of the present application:

[0030] In the embodiment of the present application, by setting the flow cross-section area of ​​the flow channel to be positively correlated with the length of the flow channel, the shorter the flow channel, the more flow resistance is added, so that the difference in flow resistance of each flow channel is small, and the uniformity of the flow of each flow channel can be improved. In this way, the uniformity of the thermal management effect of the thermal management component on the battery cell can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0032] Figure 1 is a schematic diagram of the structure of a thermal management component provided by an embodiment of the present application;

[0033] Figure 2 It is a schematic diagram of the structure of the flow channel provided in the embodiment of the present application;

[0034] Figure 3 is a schematic diagram of the coordination between the thermal management component and the battery cell array provided in an embodiment of the present application;

[0035] Figure 4 is a schematic structural diagram of a thermal management plate provided in an embodiment of the present application;

[0036] Figure 5 is a schematic structural diagram of a first end plate provided in an embodiment of the present application;

[0037] Figure 6 is a top view of a thermal management plate provided in an embodiment of the present application;

[0038] Figure 7 is along Figure 6 Sectional view of AA in the middle;

[0039] Figure 8 yes Figure 7 The enlarged view of point B in the middle;

[0040] Fig. 9 is a schematic structural diagram of a second end plate provided in an embodiment of the present application;

[0041] Fig.10 is a schematic structural diagram of a plate body provided in an embodiment of the present application;

[0042] Fig.11 is a structural schematic diagram of another thermal management board provided in an embodiment of the present application;

[0043] Fig.12 yes Figure 1Enlarged view of point C in the middle;

[0044] Fig.13 is a top view of another thermal management plate provided in an embodiment of the present application;

[0045] Fig.14 is along Fig.13 Cross-sectional view of the middle DD;

[0046] Fig.15 It is an exploded view of the liquid inlet series pipe / liquid outlet series pipe provided in the embodiment of the present application;

[0047] Fig.16 is a top view of a thermal management assembly provided in an embodiment of the present application;

[0048] Fig.17 is a schematic diagram of a partial structure of a thermal management system provided in an embodiment of the present application;

[0049] Fig.18 yes Fig.17 Enlarged view of point E in the middle;

[0050] Fig.19 is a structural schematic diagram of a pipeline connection structure provided in an embodiment of the present application;

[0051] Fig. 20 is a schematic diagram of the longitudinal cross-section structure of the pipeline connection structure provided in an embodiment of the present application;

[0052] Fig.21 It is a schematic diagram of the structure of the battery provided in the embodiment of the present application.

[0053] Description of reference numerals:

[0054] 001-thermal management component; 111-body; 112-interceptor structure; 113-thermal management plate; 1131-plate body; 11311-interceptor wall; 1132-first end plate; 11321-first slot; 1133-second end plate; 11331-partitioning plate; 11332-liquid inlet slot; 11333-liquid outlet slot; 11334-liquid inlet port; 11335-liquid outlet port; 11336-second slot; 1141-liquid inlet sub-channel; 1142-liquid outlet sub-channel; 1143-partitioning plate; 115-liquid inlet serial pipe; 1151-end pipe; 11511 -conical surface; 1152-middle tube; 11521-limiting hole; 11522-bell mouth; 1153-flexible sealing bushing; 11531-block; 116-liquid outlet serial pipe; 012-main liquid inlet; 013-main liquid outlet; 002-main liquid inlet pipe; 003-main liquid outlet pipe; 004-battery pack; 041-battery cell; 042-box; 005-pipeline connection structure; 051-first pipe joint; 052-second pipe joint; 521-first matching structure; 053-limiting structure; 531-second matching structure; 532-first surface; 054-sealing ring. DETAILED DESCRIPTION

[0055] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of this application.

[0056] In addition, it should be understood that the specific embodiments described herein are only used to illustrate and explain the present application and are not used to limit the present application. In the present application, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0057] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0058] In the description of the embodiments of the present application, words such as "example" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "example" or "for example" in the embodiments of the present application is not to be interpreted as being more preferred or having more advantages than another embodiment or design. The use of words such as "example" or "for example" is intended to present relative concepts in a clear manner.

[0059] See also Figure 1 , Figure 1 1 is a schematic diagram of the structure of a thermal management component 001 provided in an embodiment of the present application. An embodiment of the present application provides a thermal management component 001, and the thermal management component 001 includes a thermal management component. A plurality of flow channels are arranged in the thermal management component. The area of ​​the flow cross section of the flow channel is area B, and the lengths of the plurality of flow channels are at least partially different. Area B is positively correlated with the length of the corresponding flow channel.

[0060] It can be understood that the flow channel is used for the flow of heat exchange medium. The flow cross section refers to the cross section defined by the flow channel and perpendicular to the flow direction of the fluid. The smaller the area B of the flow cross section of the flow channel, the greater the flow resistance of the flow channel to the fluid. In this embodiment, the cross-sectional areas between flow channels of different lengths can be the same or different. When the cross-sectional areas between flow channels of different lengths are different, each flow channel can be a constant diameter flow channel, and the cross section at any position of each flow channel is the area of ​​the flow cross section. When the cross-sectional areas between flow channels of different lengths are the same, a cut-off portion is provided on the flow channel, and the area of ​​the flow cross section of the cut-off portion of each flow channel is area B. When the cross-sectional areas of flow channels of different lengths are different, it is necessary to adjust the size of the cross section of each flow channel according to factors such as the fluid viscosity of the heat exchange medium, the shape of the flow channel structure, the roughness of the flow channel wall, and the flow velocity to obtain the required area of ​​the flow cross section, and the design cost and processing and manufacturing cost are relatively high. When the cross-sectional areas of flow channels of different lengths are the same, it is only necessary to adjust the flow cross-sectional area of ​​the interception portion according to the above factors, and the remaining portions of the flow channel can be designed and produced in batches, thereby controlling the design cost and processing and manufacturing cost.

[0061] Among them, one end of the flow channel is a liquid inlet port 11334, and the other end is a liquid outlet port 11335. The liquid inlet ports 11334 of multiple flow channels are connected in parallel to one pipeline, and the liquid outlet ports 11335 of multiple flow channels are connected in parallel to another pipeline. Compared with the series connection, the parallel connection can make the heat exchange medium flow more smoothly on the one hand, and on the other hand, it can reduce the temperature difference between the liquid inlet port 11334 and the liquid outlet port 11335, thereby improving the thermal management effect of the battery cell far away from the liquid inlet end.

[0062] In addition, when the thermal management component is used for a battery, the thermal management component can be a whole plate structure provided with multiple flow channels. In this case, the thermal management component is mainly placed at one end of the battery module and thermally coupled with the end face of the battery cell to perform thermal management on the battery cell. The thermal management component can also use multiple plates, each of which is provided with a flow channel. In this case, the plate can be set at one end of the battery module or between the battery cell rows. The plate is thermally coupled with the circumferential surface of the battery cell to perform thermal management on the battery cell.

[0063] In this embodiment, by setting the flow cross-section area of ​​the flow channel to be positively correlated with the length of the flow channel, the shorter the flow channel, the more flow resistance is added, so that the difference in flow resistance of each flow channel is small, thereby improving the uniformity of the flow of each flow channel. In this way, the uniformity of the thermal management effect of the thermal management component 001 on the battery cell 041 can be improved.

[0064] In one embodiment, the flow channel includes a body 111 and a flow cutoff structure 112 disposed on the body 111. The area of ​​the flow cross section of the body 111 is area A, and area B is the area of ​​the flow cross section of the flow cutoff structure 112, satisfying: area A ≥ area B. The areas A of the multiple flow channels are equal.

[0065] It can be understood that the intercepting structure 112 can be arranged at the end of the body 111, or in the middle of the body 111, such as Figure 2 As shown, Figure 2 Schematic diagram of the flow channel structure provided in the embodiment of the present application. Taking the cross section of the flow channel as a circle as an example, Figure 2 In the example, the radius of the intercepting structure 112 is r, and the area B of the flow cross section of the intercepting structure 112 is: Area B = πr 2 ; The radius of the body 111 is R, and the area A of the flow cross section of the body 111 is: Area A = πR 2 Wherein, R≥r, so as to realize area A≥area B. The smaller the area B of the flow cross section of the intercepting structure 112 is, the greater the flow resistance of the intercepting structure 112 to the fluid is.

[0066] In this embodiment, by providing a cut-off structure 112 on the flow channel, the area of ​​the flow cross-section of which is positively correlated with the length of the flow channel, on the one hand, the flow resistance of the shorter flow channel can be increased, thereby reducing the difference in flow resistance of each flow channel, thereby improving the uniformity of flow in each flow channel; on the other hand, it is only necessary to adjust the area B of the flow cross-section of each cut-off structure 112 to adjust the flow resistance of the flow channel, while the structure of the main body 111 remains unchanged, and batch design and production can be carried out, thereby controlling design costs and processing and manufacturing costs.

[0067] See also Figure 1 In one embodiment, the thermal management component includes a plurality of thermal management plates 113 , and the plurality of flow channels are arranged in a one-to-one correspondence with the plurality of thermal management plates 113 .

[0068] It can be understood that the thermal management component 001 is applied to a battery module, and the battery module includes a plurality of battery cell columns arranged in sequence, and a plurality of thermal management plates 113 are arranged in sequence along the arrangement direction of the plurality of battery cell columns, and a gap for placing the battery cell columns is formed between two adjacent thermal management plates 113. When the battery cell is a cylindrical battery cell, the thermal management plate 113 is a serpentine plate, and its surface is in contact with the battery cell, such as Figure 3 shown.

[0069] In this embodiment, by setting the thermal management component as a structure of multiple thermal management plates 113, on the one hand, the thermal management plate 113 can be set between two adjacent battery cell columns, so as to increase the contact area between the thermal management component 001 and the battery cell, thereby improving the thermal management efficiency of the thermal management component, and the thermal management plate 113 can also be used instead of the battery cell bracket as the supporting and positioning structure of the battery cell, thereby simplifying the number of components of the battery; on the other hand, one thermal management plate 113 can be maintained separately, thereby improving the convenience of maintenance and reducing maintenance costs.

[0070] See also Figure 4 , Figure 4 1 is a schematic diagram of the structure of the heat management plate 113 provided in an embodiment of the present application. In one embodiment, the heat management plate 113 includes a plate body 1131 and a first end plate 1132. The first end plate 1132 is provided with a first slot 11321, such as Figure 5 As shown, Figure 5 1 is a schematic diagram of the structure of the first end plate 1132 provided in an embodiment of the present application. The first end of the plate body 1131 is sealed and plugged into the first slot 11321. The body 111 includes a liquid inlet channel and a liquid outlet channel. The liquid inlet channel and the liquid outlet channel are arranged in parallel on the plate body 1131. One end of the liquid inlet channel and one end of the liquid outlet channel are both connected to the first slot 11321. Among them, the first end of the plate body 1131 is provided with a cutoff wall 11311, and the cutoff wall 11311 is located between the liquid inlet channel and the liquid outlet channel. The cutoff wall 11311 and the inner wall of the first slot 11321 define a cutoff structure 112, as shown in FIG. Figure 6 and Figure 7 As shown, Figure 6 is a top view of the heat management plate 113 provided in an embodiment of the present application, Figure 7 is along Figure 6 Sectional view of AA.

[0071] It can be understood that the intercepting wall 11311 and the inner wall of the first slot 11321 enclose an annular channel, which is the intercepting structure 112, and the annular channel is located between the liquid inlet channel and the liquid outlet channel. The heat exchange medium in the liquid inlet channel flows through the annular channel and enters the liquid outlet channel. The area B of the flow cross section of the intercepting structure 112 can be adjusted by adjusting the size of the annular channel to achieve a positive correlation between the size of the area B and the length of the corresponding flow channel, thereby completing the adjustment of the flow resistance of each flow channel.

[0072] Exemplarily, the plate body 1131 and the first end plate 1132 are both metal parts with good heat conduction, such as aluminum. After the plate body 1131 and the first end plate 1132 are plugged together, the plate body 1131 and the first end plate 1132 are fixed and sealed by welding.

[0073] In this embodiment, through the above-mentioned arrangement, the cut-off structure 112 is arranged at one end of the heat management plate 113, and the cut-off structure 112 is formed by the opposite surfaces of the first end plate 1132 and the plate body 1131. On the one hand, unnecessary processing complexity can be avoided, so that the molding method of the cut-off structure 112 is simple, thereby improving the manufacturing efficiency; on the other hand, the cut-off structure 112 can be adjusted more conveniently according to factors such as the fluid viscosity of different heat exchange media, the shape of the flow channel structure, the roughness of the flow channel wall, and the flow rate, thereby improving the cost of structural changes of the thermal management component 001.

[0074] See also Figure 8 , Figure 8 yes Figure 7 In one embodiment, there is a distance d between the intercepting wall 11311 and the bottom of the first slot 11321. For different heat management plates 113, the distance d is positively correlated with the length of the corresponding flow channel. Figure 8 In the embodiment, the heat exchange medium flows from the liquid inlet channel into one side of the first slot 11321, then flows through the intercepting wall 11311 into the other side of the first slot 11321, and then flows into the liquid outlet channel.

[0075] It can be understood that the larger the distance d between the intercepting wall 11311 and the bottom of the first slot 11321, the larger the area B of the flow cross section of the intercepting structure 112, and the smaller the flow resistance of the intercepting structure 112 to the fluid; conversely, the smaller the area B of the flow cross section of the intercepting structure 112, the larger the flow resistance of the intercepting structure 112 to the fluid. Therefore, by adjusting the distance d between the intercepting wall 11311 and the bottom of the first slot 11321 to obtain the required area B, the flow resistance of the flow channels of different lengths can be adjusted, and finally the consistency of the flow resistance of each flow channel can be improved.

[0076] Among them, combined Figure 5 and Figure 8 , the area B of the flow cross section of the intercepting structure 112 is explained as follows. The intercepting structure 112 is surrounded by the intercepting wall 11311, the bottom of the first slot 11321, and the portion of the slot wall of the first slot 11321 located between the bottom and the intercepting wall 11311. Taking the rectangular flow cross section of the intercepting structure 112 as an example, that is, the slot walls on both sides of the first slot 11321 are parallel to each other, the intercepting wall 11311 and the bottom of the first slot 11321 are parallel to each other, and the intercepting wall 11311 is perpendicular to the slot wall of the first slot 11321. Figure 5 In the embodiment, the width dimension of the first slot 11321 is w, that is, the width dimension of the flow cross section of the intercepting structure 112 is w. Figure 8 In the embodiment, the distance between the intercepting wall 11311 and the bottom of the first slot 11321 is d, that is, the long side dimension of the flow cross section of the intercepting structure 112 is d. And the long side dimension and the wide side dimension are both perpendicular to the direction of the fluid flowing at the intercepting wall 11311 (see Figure 8 , Figure 8 In the figure, the direction of the fluid flowing at the intercepting wall 11311 is from left to right), so the section where the long side dimension and the wide side dimension are located is the flow cross section of the intercepting structure 112. Correspondingly, the area B of the flow cross section of the intercepting structure 112 is: area B=wd.

[0077] As can be seen from the above, the area B of the flow cross section is positively correlated with the spacing d, and the area B of the flow cross section is positively correlated with the length of the corresponding flow channel. Therefore, the spacing d is positively correlated with the length of the corresponding flow channel. In this way, the depth of the first slot 11321 can be adjusted accordingly for flow channels of different lengths under the premise that the depth of the plate body 1131 inserted into the first slot 11321 is constant; the spacing d can also be adjusted by adjusting the depth of the plate body 1131 inserted into the first slot 11321 under the premise that the depth of the first slot 11321 is constant. Thus, by adjusting the spacing d between the intercepting wall 11311 and the bottom of the first slot 11321, the long side dimension of the flow cross section of the required intercepting structure 112 can be obtained, and then the area of ​​the flow cross section of the intercepting structure 112 can be adjusted. In this way, the flow resistance of flow channels of different lengths can be adjusted by adjusting the depth of the plate body 1131 inserted into the first slot 11321, thereby improving the consistency of the flow resistance of each flow channel.

[0078] For example, the length dimensions L of the flow channel are L1, L2, ..., L n In the flow channel with a length of L1, the distance between the intercepting wall 11311 and the bottom of the first slot 11321 is d1. In the flow channel with a length of L2, the distance between the intercepting wall 11311 and the bottom of the first slot 11321 is d2=d1+δ1, ..., the length is L n In the flow channel, the distance between the intercepting wall 11311 and the bottom of the first slot 11321 is d n =d1+δ n The value of δ can be obtained by simulation based on factors such as the fluid viscosity of the heat exchange medium in the flow channel, the flow channel structure shape, the roughness of the flow channel wall, and the flow velocity. The simulation software includes but is not limited to STAR-CCM+ fluid simulation software.

[0079] In addition, the inlet channel and the outlet channel are arranged in parallel, and their lengths are the same. The lengths of the inlet channel are of three sizes, 56 mm, 104 mm and 124 mm. Specifically, in the inlet channel with a length of 56 mm, d is 0.6 mm. In the inlet channel with a length of 104 mm, d is 2.6 mm. In the inlet channel with a length of 124 mm, d is 4.6 mm.

[0080] In this embodiment, the area B of the flow cross-section of the interception structure 112 is adjusted by adjusting the distance d between the interception wall 11311 and the bottom of the first slot 11321, so that the interception structure 112 is simple and easy to adjust, which is beneficial to controlling the manufacturing cost of the thermal management component 001.

[0081] See also Figure 4In one embodiment, the heat management plate 113 further includes a second end plate 1133. The second end plate 1133 is provided with a second slot 11336. A partition plate 11331 is provided in the second slot 11336. The partition plate 11331 divides the second slot 11336 into a liquid inlet groove 11332 and a liquid outlet groove 11333. Fig. 9 As shown, Fig. 9 1 is a schematic diagram of the structure of the second end plate 1133 provided in an embodiment of the present application. The plate body 1131 has a second end opposite to the first end. The second end is sealed and plugged into the second slot 11336. The other end of the liquid inlet channel and the other end of the liquid outlet channel are respectively connected to the liquid inlet groove 11332 and the liquid outlet groove 11333. The outer wall of the second end plate 1133 is provided with a liquid inlet port 11334 and a liquid outlet port 11335 respectively connected to the liquid inlet groove 11332 and the liquid outlet groove 11333.

[0082] It can be understood that the heat exchange medium passes through the liquid inlet port 11334, the liquid inlet channel, the intercepting structure 112, and the liquid outlet channel in sequence and is discharged from the liquid outlet port 11335.

[0083] Exemplarily, the second end plate 1133 is an aluminum plate, which is welded to the plate body 1131 .

[0084] In this embodiment, through the above arrangement, a liquid inlet port 11334 and a liquid outlet port 11335 respectively used to communicate with the liquid inlet channel and the liquid outlet channel can be formed through a second end plate 1133, so that the structure of the liquid inlet end and the liquid outlet end of the heat management plate 113 is simple, and then the molding method of the heat management plate 113 is simple. Thus, the manufacturing efficiency can be improved.

[0085] In addition, the liquid inlet port 11334 and the liquid outlet port 11335 are arranged on the same side of the heat management plate 113, which can simplify the layout structure of the heat management component 001. Compared with the structure in which the liquid inlet port 11334 and the liquid outlet port 11335 are arranged at both ends of the heat management plate 113, the liquid inlet port 11334 and the liquid outlet port 11335 are arranged overlappingly in this embodiment, thereby reducing the space occupied by the heat management component 001 in the flow channel length direction, which is beneficial to the arrangement of the internal components of the battery.

[0086] See also Fig.10 , Fig.101 is a schematic diagram of the structure of the plate body 1131 provided in an embodiment of the present application. In one embodiment, a plurality of spacers 1143 are provided in the liquid inlet channel. The plurality of spacers 1143 separate the liquid inlet channel into a plurality of independent liquid inlet sub-channels 1141. One end of the plurality of liquid inlet sub-channels 1141 is connected to the first slot 11321. The other ends of the plurality of liquid inlet sub-channels 1141 are connected to the second slot 11336, specifically to the liquid inlet groove 11332. The structure of the liquid outlet channel is the same as that of the liquid inlet channel. It can be understood that a plurality of spacers 1143 are also provided in the liquid outlet channel, and the plurality of spacers 1143 separate the liquid outlet channel into a plurality of independent liquid outlet sub-channels 1142. One end of the plurality of liquid outlet sub-channels 1142 is connected to the other side of the first slot 11321. The other ends of the plurality of liquid outlet sub-channels 1142 are connected to the liquid outlet groove 11333.

[0087] Exemplarily, the spacer plate 1143 is integrally formed with the plate body 1131 .

[0088] In this embodiment, a plurality of partition plates 1143 are provided in the liquid inlet channel and the liquid outlet channel so that the liquid inlet channel and the liquid outlet channel are respectively divided into a plurality of independent liquid inlet sub-channels 1141 and a plurality of independent liquid outlet sub-channels 1142. On the one hand, the heat exchange medium is divided into a plurality of thin streams, and no two adjacent thin streams interfere with each other, thereby improving the smoothness of the flow of the heat exchange medium; on the other hand, the strength of the plate body 1131 can be improved, thereby improving the impact resistance of the plate body 1131.

[0089] See also Fig.11 , Fig.11 It is a structural schematic diagram of another thermal management plate 113 provided by an embodiment of the present application. In one embodiment, the two ends of the flow channel are respectively a liquid inlet port 11334 and a liquid outlet port 11335. The thermal management component also includes a liquid inlet series pipe 115 and a liquid outlet series pipe 116. Multiple thermal management plates 113 are arranged side by side in sequence. A liquid inlet series pipe 115 and a liquid outlet series pipe 116 are provided between two adjacent thermal management plates 113. The two ends of the liquid inlet series pipe 115 are respectively connected to the liquid inlet port 11334 of the flow channel on the adjacent thermal management plate 113. The two ends of the liquid outlet series pipe 116 are respectively connected to the liquid outlet ports 11335 of the flow channel on the two adjacent thermal management plates 113. A main liquid inlet 012 is provided on a liquid inlet series pipe 115 or a thermal management plate 113. A main liquid outlet 013 is provided on a liquid outlet series pipe 116 or a thermal management plate 113.

[0090] It can be understood that the liquid inlet series pipe 115 and the liquid outlet series pipe 116 are connected to the second end plate 1133, and the two ends of the liquid inlet pipe are connected to the liquid inlet port 11334 on the adjacent second end plate 1133, and the two ends of the liquid outlet series pipe 116 are connected to the liquid outlet port 11335 on the adjacent second end plate 1133.

[0091] Exemplarily, the heat management plate 113 is provided with a main liquid inlet 012 and a main liquid outlet 013. Specifically, the main liquid inlet 012 and the main liquid outlet 013 are provided at one end of the second end plate 1133 away from the plate body 1131. For ease of description, the second end plate 1133 provided with the main liquid inlet 012 and the main liquid outlet 013 is defined as the central second end plate. The main liquid inlet 012 is connected to the liquid inlet groove 11332 of the central second end plate, and the main liquid outlet 013 is connected to the liquid outlet groove 11333 of the central second end plate. The heat exchange medium enters the liquid inlet groove 11332 from the main liquid inlet 012, and then the heat exchange medium entering the liquid inlet groove 11332 is divided into three parts. After the first part of the heat exchange medium enters the liquid inlet channel of the plate body 1131 plugged into the central second end plate, it passes through the intercepting structure 112, the liquid outlet channel, and the liquid outlet groove 11333 of the central second end plate 1133 in sequence, and then is discharged from the main liquid outlet 013. After the second part of the heat exchange medium flows into the liquid inlet series connection pipe 115 located on the first side of the central second end plate, it enters the liquid inlet groove 11332 of each second end plate 1133 arranged on the first side of the central second end plate in sequence, and flows according to the flow path of the first part of the heat exchange medium and then is discharged from the liquid outlet groove 11333, then flows to the liquid outlet groove 11333 of the central second end plate through the liquid outlet series connection pipe 116, and finally is discharged from the main liquid outlet 013. After the third part of the heat exchange medium flows into the liquid inlet series connection pipe 115 located on the second side of the central second end plate, it flows according to the flow path of the second part of the heat exchange medium. Among them, the first side of the central second end plate and the second side of the central second end plate 1133 are opposite to each other.

[0092] In addition, the main liquid inlet 012 and the main liquid outlet 013 can be set on the two second end plates 1133 located at the center of the second end plates 1133, thereby increasing the liquid inlet pressure of the heat exchange medium, thereby increasing the flow rate of the heat exchange medium, and further improving the heat exchange efficiency. Fig.12 As shown, Fig.12 for Figure 1 Enlarged view of point C in the middle.

[0093] In this embodiment, through the above arrangement, on the one hand, the liquid inlet structure and the liquid outlet structure of the thermal management component 001 are partially overlapped with the thermal management plate 113, thereby improving the space utilization of the thermal management component 001 and reducing the space occupied by the thermal management component 001. On the other hand, the liquid inlet structure and the liquid outlet structure of the thermal management component 001 are simple, making them easy to assemble and form, thereby improving the assembly efficiency of the thermal management component 001.

[0094] See also Fig.13 , Fig.13 1 is a top view of another heat management plate 113 provided by an embodiment of the present application. In one embodiment, the liquid inlet serial connection pipeline 115 includes an intermediate tube 1152 and an end tube 1151, and there are two end tubes 1151, and the two ends of the end tube 1151 are respectively a third end and a fourth end; one end of each end tube 1151 is plugged with one end of the intermediate tube 1152, and the fourth end of each end tube 1151 is connected to the liquid inlet port 11334 of the flow channel on the adjacent heat management plate 113, and the structure of the liquid outlet serial connection pipeline 116 is the same as that of the liquid inlet serial connection pipeline 115.

[0095] It can be understood that the end pipe 1151 is fixed to the corresponding second end plate 1133. The end pipe 1151 of the inlet serial pipe 115 is connected to the inlet port 11334 of the second end plate 1133, and the end pipe 1151 of the outlet serial pipe 116 is connected to the outlet port 11335 of the second end plate 1133.

[0096] Exemplarily, the end pipe 1151 is plugged into the middle pipe 1152 , and the end pipe 1151 is welded to the corresponding second end plate 1133 .

[0097] In this embodiment, through the above arrangement, the liquid inlet serial connection pipe 115 and the liquid outlet serial connection pipe 116 are composed of multiple components, so that the end pipe 1151 can be first fixed on the second end plate 1133, and then the middle pipe 1152 is connected to the end pipe 1151, so as to complete the connection of two adjacent thermal management plates 113. Therefore, the assembly method of the thermal management component 001 is simple and easy to operate, thereby improving the assembly efficiency of the thermal management component 001.

[0098] See also Fig.14 , Fig.14 is along Fig.13 In one embodiment, the liquid inlet serial connection pipeline 115 further includes a flexible sealing bushing 1153, the first end of the end pipe 1151 is inserted into the middle pipe 1152, the flexible sealing bushing 1153 is arranged in the middle pipe 1152 and is located between the end pipe 1151 and the middle pipe 1152, the flexible sealing bushing 1153 is radially compressed, and the structure of the liquid outlet serial connection pipeline 116 is the same as that of the liquid inlet serial connection pipeline 115.

[0099] Exemplarily, the flexible sealing bushing 1153 is a rubber bushing, for example, an ethylene propylene diene monomer (EPDM) rubber bushing.

[0100] In this embodiment, by providing a flexible sealing bushing 1153 between the end tube 1151 and the middle tube 1152 , the sealing between the end tube 1151 and the middle tube 1152 can be improved, thereby improving the reliability of the thermal management component 001 .

[0101] See also Fig.15 , Fig.15 1 is an exploded view of the liquid inlet serial connection pipe 115 / liquid outlet serial connection pipe 116 provided in an embodiment of the present application. In one embodiment, the flexible sealing bushing 1153 is clamped with the intermediate pipe 1152 along the radial direction of the intermediate pipe 1152. Specifically, a stopper 11531 is provided on the outer circumferential surface of the flexible sealing bushing 1153, and a limiting hole 11521 is provided on the intermediate pipe 1152, and the stopper 11531 is inserted into the limiting hole 11521.

[0102] In this embodiment, the flexible sealing sleeve 1153 is clamped with the middle tube 1152 along the radial direction of the middle tube 1152, so that when the end tube 1151 is plugged into the middle tube 1152, the flexible sealing sleeve 1153 can be prevented from moving or rotating, thereby making the flexible sealing sleeve 1153 stably in a predetermined position, which is beneficial to improving the reliability of the seal between the end tube 1151 and the middle tube 1152.

[0103] See also Fig.15 , Fig.15 1 is an exploded view of the liquid inlet serial connection pipe 115 / liquid outlet serial connection pipe 116 provided in an embodiment of the present application. In one embodiment, the outer peripheral surface of the end pipe 1151 close to the first end is a conical surface 11511, the small diameter end of the conical surface 11511 is located at the end of the end pipe 1151 away from the heat management plate 113 connected thereto, and the large diameter end of the conical surface 11511 is interference fit with the intermediate pipe 1152.

[0104] In this embodiment, by setting the conical surface 11511, when the end tube 1151 and the middle tube 1152 are plugged together, the small diameter end of the end tube 1151 is first inserted into the middle tube 1152, so that the gap between the small diameter end and the middle tube 1152 can be used to guide the plug-in connection between the two, thereby improving the smoothness of the plug-in installation and ultimately improving the assembly efficiency.

[0105] See also Fig.15 In one embodiment, both ends of the intermediate tube 1152 are bell mouths 11522 , and both ends of the flexible sealing bushing 1153 extend to the bell mouths 11522 at both ends of the intermediate tube 1152 , respectively, and fit with the wall surface of the bell mouths 11522 .

[0106] In this embodiment, by fitting the two ends of the flexible sealing bushing 1153 to the wall surface of the bell mouth 11522 , the movement of the flexible sealing bushing 1153 can be further restricted based on the cooperation of the two ends, thereby further improving the position stability of the flexible sealing bushing 1153 .

[0107] See also Fig.16 , Fig.16 001 is a top view of the thermal management component 001 provided in an embodiment of the present application. In one embodiment, the extension direction of the plurality of flow channels is consistent, and the plurality of flow channels are arranged in sequence and spaced apart along a direction perpendicular to the extension direction of the flow channels, and the plurality of flow channels are symmetrically distributed on the thermal management component along a first center line, and the first center line is parallel to the extension direction of the flow channels.

[0108] It can be understood that the main liquid inlet 012 and the main liquid outlet 013 of the thermal management component 001 are symmetrically arranged along the first center line.

[0109] In this embodiment, through the above arrangement, the multiple flow channels are symmetrically arranged, so that the heat exchange medium can flow more evenly, thereby achieving a better thermal management effect.

[0110] Accordingly, an embodiment of the present application provides a thermal management system, which includes a temperature management module, a main liquid inlet pipe 002, a main liquid outlet pipe 003, a hydraulic pump and the aforementioned thermal management component 001. The flow channel is filled with a heat exchange medium. The temperature management module is used to perform temperature management on the heat exchange medium. The two ends of the main liquid inlet pipe 002 are respectively connected to the temperature management module and one end of the flow channel. The two ends of the main liquid outlet pipe 003 are respectively connected to the temperature management module and the other end of the flow channel. The hydraulic pump is used to drive the heat exchange medium to flow.

[0111] It is understood that when the battery cell needs to be heated, the temperature management module is a device for heating the heat exchange medium, such as a pipe or cylinder wrapped with a heating wire. When the battery cell needs to be cooled, the temperature management module is a device for cooling the heat exchange medium, such as an evaporator or a fin heat sink.

[0112] In this embodiment, by using the above-mentioned thermal management component 001, the shorter the flow channel, the more flow resistance is added, so that the difference in flow resistance of each flow channel is small, thereby improving the uniformity of the flow rate of each flow channel. In this way, the uniformity of the thermal management effect of the thermal management system on the battery cell can be improved.

[0113] See also Fig.17 and Fig.18 , Fig.17 is a partial structural diagram of a thermal management system provided in an embodiment of the present application, Fig.18 yes Fig.17In one embodiment, the thermal management system further includes a pipe connection structure 005, and the pipe connection structure 005 includes a first pipe joint 051, a second pipe joint 052 and a limiting structure 053, such as Fig.19 As shown, Fig.19 It is a structural schematic diagram of the pipeline connection structure 005 provided in an embodiment of the present application. The first end of the second pipe joint 052 is plugged into one end of the first pipe joint 051. The outer surface of the second pipe joint 052 is provided with a first matching structure 521. One end of the limiting structure 053 is connected to the outer peripheral surface of the first pipe joint 051, and the other end is provided with a second matching structure 531. Along the plug-in direction, the second matching structure 531 is blocked and matched with the first matching structure 521, and along the plug-in direction, the second matching structure 531 is gap-matched with the first matching structure 521. Among them, the main liquid inlet pipe 002 is connected to one end of the flow channel through the pipeline connection structure 005, and the main liquid outlet pipe 003 is connected to the other end of the flow channel through the pipeline connection structure 005.

[0114] It can be understood that between the main liquid inlet pipe 002 and the flow channel, the second pipe joint 052 can be connected to the main liquid inlet pipe 002, and the first pipe joint 051 can be connected to the flow channel, or the first pipe joint 051 can be connected to the main liquid inlet pipe 002, and the second pipe joint 052 can be connected to the flow channel. Between the main liquid outlet pipe 003 and the flow channel, the second pipe joint 052 can be connected to the main liquid outlet pipe 003, and the first pipe joint 051 can be connected to the flow channel, or the first pipe joint 051 can be connected to the main liquid outlet pipe 003, and the second pipe joint 052 can be connected to the flow channel.

[0115] The clearance fit between the second matching structure 531 and the first matching structure 521 means that after the first pipe joint 051 and the second pipe joint 052 are plugged together, the first pipe joint 051 can move relative to the second pipe joint 052 in the plugging direction within the clearance range. The plugging of one end of the second pipe joint 052 with one end of the first pipe joint 051 can be done by inserting one end of the second pipe joint 052 into the inner hole of the first pipe joint 051 or by inserting one end of the first pipe joint 051 into the inner hole of the second pipe joint 052.

[0116] In addition, the second matching structure 531 and the first matching structure 521 can be stopped and matched, and one of them can be a slot body, and the other is inserted into the slot body, and has a clearance fit with the slot body in the plug-in direction, and the stop fit in the plug-in direction is achieved based on the limitation of the slot wall of the slot body. For example, the first matching structure 521 is a slot provided on the outer surface of the second pipe joint 052, and the second matching structure 531 is a convex piece provided at the other end of the limiting structure 053, and the convex piece is inserted into the slot, so that the movement of the convex piece is limited to the slot walls on both sides of the slot in the plug-in direction, thereby achieving the stop fit of the first matching structure 521 and the second matching structure 531. In the plug-in direction, the size of the convex piece is smaller than the size of the slot, so that the second matching structure 531 and the first matching structure 521 can be clearance fit.

[0117] The second matching structure 531 and the first matching structure 521 can be matched in a stopping manner. The second matching structure 531 and the first matching structure 521 can also be protrusions, and the second matching structure 531 is located on the side of the first matching structure 521 that is connected to the first pipe away from the limiting structure 053. Based on the restriction of the first matching structure 521 on the second matching structure 531 when the first pipe joint 051 and the second pipe joint 052 are away from each other, and the restriction of the limiting structure 053 on the second pipe joint 052 when the first pipe joint 051 and the second pipe joint 052 are close to each other, the stopping cooperation in the plugging direction is realized.

[0118] Exemplarily, the limiting structure 053 is a claw, one end of which is connected to the outer peripheral surface of the first pipe joint 051, and the other end is provided with a second matching structure 531. The first pipe joint 051 and the second pipe joint 052 are connected by the claw, so as to realize the quick plug connection of the pipeline, thereby improving the connection efficiency of the relevant pipeline components.

[0119] In this embodiment, the first pipe joint 051 and the second pipe joint 052 can be moved closer to or farther from each other by the clearance fit between the second fitting structure 531 and the first fitting structure 521, so that the assembly tolerance of the related pipeline assembly using the pipeline connection structure 005 can be absorbed or compensated based on the clearance, thereby reducing the assembly accuracy requirements for the related pipeline assembly. As a result, the pipeline connection design of the related pipeline assembly is relatively simple, and the reliability of the related pipeline assembly can be improved.

[0120] See also Fig. 20 , Fig. 20It is a schematic diagram of the longitudinal cross-sectional structure of the pipe connection structure 005 provided in an embodiment of the present application. In one embodiment, the first matching structure 521 is a first boss. The second matching structure 531 is a second boss. The second boss is located on the side of the first boss away from the first end. Among them, the end of the second pipe joint 052 plugged into the first pipe joint 051 is the first end. The second pipe joint 052 has a first end face located at the first end. The limiting structure 053 has a first surface 532 arranged opposite to the first end face. The distance between the side of the second boss close to the first boss and the first surface 532 is L1, and the distance between the side of the first boss close to the second boss and the first end face is L2, satisfying: L1>L2.

[0121] It can be understood that L1-L2=ΔL, where ΔL is the maximum assembly tolerance that the pipeline connection structure 005 can absorb or compensate for.

[0122] When the first end face abuts against the first surface 532, the maximum assembly tolerance is absorbed. When the first boss abuts against the second boss, the maximum assembly tolerance is compensated.

[0123] Exemplarily, the diameter of the fitting portion between the first pipe joint 051 and the second pipe joint 052 is D, which satisfies: 10% D ≤ ΔL ≤ 20% D. It can be understood that ΔL includes but is not limited to 10% D, 12% D, 13% D, 15% D, 17% D, 18% D, and 20% D. For example, when D is 18 mm, ΔL includes but is not limited to 1.8 mm, 2 mm, 2.4 mm, 2.5 mm, 2.7 mm, 3.1 mm, and 3.6 mm.

[0124] In this embodiment, through the above-mentioned setting, the blocking cooperation between the second matching structure 531 and the first matching structure 521 can be achieved without setting either of them as a groove body, thereby improving the structural strength of the pipeline connection structure 005 under a certain pipeline wall thickness, and finally improving the reliability of the pipeline connection structure 005.

[0125] See also Fig.18 In one embodiment, the port where the main liquid inlet pipe 002 is connected to the flow channel is the first flow channel port. The main liquid inlet pipe 002 has two first flow channel ports. The two first flow channel ports are respectively connected to one end of the two flow channels through two pipeline connection structures 005. The port where the main liquid outlet pipe 003 is connected to the flow channel is the second flow channel port. The main liquid outlet pipe 003 has two second flow channel ports. The two second flow channel ports are respectively connected to the other end of the two flow channels through two pipeline connection structures 005.

[0126] It can be understood that the two first flow channel openings are each connected to the corresponding flow channel through a pipeline connection structure 005. Correspondingly, the main liquid inlet pipe 002 is a three-way pipeline with three pipeline openings, two of which are first flow channel openings, and the third pipeline opening is used for liquid inlet. Correspondingly, the main liquid outlet pipe 003 is also a three-way pipeline with three pipeline openings, two of which are second flow channel openings, and the third pipeline opening is used for liquid outlet.

[0127] In this embodiment, by setting two first flow openings and two second flow openings, compared with setting one first flow opening and one second flow opening, on the one hand, the thermal management system has multiple liquid inlets and liquid outlets, thereby improving the flow efficiency of the heat exchange medium and thus improving the heat dissipation effect. On the other hand, when one of the first flow openings and one of the second flow openings fails, the other first flow opening and the second flow opening can still operate normally, thereby improving the reliability and stability of the thermal management component 001.

[0128] See also Fig.18 In one embodiment, a portion of the main liquid inlet pipe 002 between the two first flow channel openings is connected to a pipe connection structure 005. A portion of the main liquid outlet pipe 003 between the two second flow channel openings is connected to a pipe connection structure 005.

[0129] In this embodiment, by providing a pipe connection structure 005 between the two first flow channel openings, a matching gap is provided between the two first flow channel openings, so that the assembly tolerance can be absorbed or compensated based on the gap, thereby reducing the assembly accuracy requirement for the thermal management component 001. Similarly, by providing a pipe structure between the two second flow channel openings, the assembly accuracy requirement for the thermal management component 001 can also be reduced.

[0130] Specifically, the axis of the pipe connection structure 005 between the two second flow channel openings is parallel to the axis of the pipe connection structure 005 between the two first flow channel openings. The axis of the pipe connection structure 005 between the two first flow channel openings is perpendicular to the axis of the pipe connection structure 005 between the first flow channel opening and the flow channel. Thus, the pipe connection structure 005 between the two first flow channel openings and the pipe connection structure 005 between the two second flow channel openings absorb or compensate for the assembly tolerance in the first direction. The pipe connection structure 005 between the first flow channel opening and the flow channel and the pipe connection structure 005 between the second flow channel opening and the flow channel absorb or compensate for the assembly tolerance in the second direction.

[0131] See also Fig.21 , Fig.21 004 includes the thermal management system described above.

[0132] It can be understood that the battery pack 004 also includes a box 042 and a battery module, the battery module and the thermal management component 001 are arranged in the box 042, and the plate body 1131 is thermally coupled with the battery cell of the battery module. The temperature management module, the main liquid inlet pipe 002, the main liquid outlet pipe 003 and the hydraulic pump can be arranged outside the box 042. The battery module includes a plurality of battery cells 041 connected in series and / or in parallel.

[0133] In this embodiment, by adopting the above-mentioned thermal management system, the shorter the flow channel, the more flow resistance is added, so that the difference in flow resistance of each flow channel is small, and the uniformity of flow of each flow channel can be improved. Thus, the uniformity of thermal management effect of the battery cell is improved, and the reliability of the battery can be improved.

[0134] The embodiments of the present application are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. At the same time, for technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A thermal management component, characterized in that: It comprises a thermal management component, in which a plurality of flow channels are arranged, the flow cross-section area of ​​the flow channel is area B, the lengths of the plurality of flow channels are at least partially different, and the area B is positively correlated with the length of the corresponding flow channel.

2. The thermal management assembly according to claim 1, characterized in that The flow channel includes a main body and a cut-off structure arranged on the main body. The area of ​​the flow cross-section of the main body is area A. The areas A of the multiple flow channels are equal. The area B is the area of ​​the flow cross-section of the cut-off structure, satisfying: Area A ≥ Area B.

3. The thermal management assembly according to claim 2, characterized in that The heat management component includes a plurality of heat management plates, and the plurality of flow channels are arranged in a one-to-one correspondence with the plurality of heat management plates.

4. The thermal management assembly according to claim 3, characterized in that The thermal management plate includes a plate body and a first end plate, a first slot is provided on the first end plate, and the first end of the plate body is sealed and plugged into the first slot; the body includes a liquid inlet channel and a liquid outlet channel, the liquid inlet channel and the liquid outlet channel are arranged in parallel on the plate body, one end of the liquid inlet channel and one end of the liquid outlet channel are both connected to the first slot; wherein, a cut-off wall is provided at the first end of the plate body, the cut-off wall is located between the liquid inlet channel and the liquid outlet channel, and the cut-off wall and the inner wall of the first slot define the cut-off structure.

5. The thermal management assembly according to claim 4, characterized in that There is a distance d between the intercepting wall and the bottom of the first slot. For different heat management plates, the distance d is positively correlated with the length of the corresponding flow channel.

6. The thermal management assembly according to claim 4, characterized in that The thermal management plate also includes a second end plate, the second end plate is provided with a second slot, a partition plate is provided in the second slot, and the partition plate divides the second slot into a liquid inlet slot and a liquid outlet slot; the plate body has a second end opposite to the first end, and the second end is sealed and plugged into the second slot; the other end of the liquid inlet channel and the other end of the liquid outlet channel are respectively connected to the liquid inlet slot and the liquid outlet slot, and a liquid inlet port and a liquid outlet port respectively connected to the liquid inlet slot and the liquid outlet slot are provided on the outer wall of the second end plate.

7. The thermal management assembly according to claim 6, characterized in that A plurality of partition plates are arranged in the liquid inlet channel, and the plurality of partition plates divide the liquid inlet channel into a plurality of mutually independent liquid inlet sub-channels, one end of each of the plurality of liquid inlet sub-channels is communicated with one side of the first slot, and the other end of each of the plurality of liquid inlet sub-channels is communicated with the liquid inlet groove; A plurality of partition plates are arranged in the liquid outlet channel, and the plurality of partition plates divide the liquid outlet channel into a plurality of independent liquid outlet sub-channels, one end of each of the plurality of liquid outlet sub-channels is connected to the other side of the first slot, and the other end of each of the plurality of liquid outlet sub-channels is connected to the liquid outlet groove.

8. The thermal management assembly according to claim 3, characterized in that The two ends of the flow channel are respectively a liquid inlet port and a liquid outlet port, the thermal management component also includes a liquid inlet series pipe and a liquid outlet series pipe, the multiple thermal management plates are arranged side by side in sequence, and the liquid inlet series pipe and the liquid outlet series pipe are arranged between two adjacent thermal management plates, the two ends of the liquid inlet series pipe are respectively connected to the liquid inlet ports of the flow channel on the adjacent thermal management plates, and the two ends of the liquid outlet series pipe are respectively connected to the liquid outlet ports of the flow channel on the two adjacent thermal management plates, a main liquid inlet is provided on the liquid inlet series pipe or the thermal management plate, and a main liquid outlet is provided on the liquid outlet series pipe or the thermal management plate.

9. The thermal management assembly according to claim 8, characterized in that The liquid inlet series pipe includes an intermediate pipe and an end pipe, and there are two end pipes. The two ends of the end pipe are respectively a third end and a fourth end; the third end of each end pipe is plugged into one end of the intermediate pipe, and the fourth end of each end pipe is connected to the liquid inlet port of the flow channel on the adjacent thermal management plate. The structure of the liquid outlet series pipe is the same as that of the liquid inlet series pipe.

10. The thermal management assembly according to claim 9, characterized in that The liquid inlet series pipe also includes a flexible sealing sleeve. The first end of the end pipe is inserted into the middle pipe. The flexible sealing sleeve is arranged in the middle pipe and located between the end pipe and the middle pipe. The flexible sealing sleeve is radially compressed. The structure of the liquid outlet series pipe is the same as that of the liquid inlet series pipe.

11. The thermal management assembly according to claim 10, characterized in that The flexible sealing bushing is clamped with the intermediate pipe along the radial direction of the intermediate pipe.

12. The thermal management assembly according to claim 11, characterized in that A stopper is arranged on the outer peripheral surface of the flexible sealing bushing, and a limiting hole is arranged on the intermediate tube, and the stopper is inserted into the limiting hole.

13. The thermal management assembly according to claim 10, characterized in that Both ends of the intermediate tube are bell mouths, and both ends of the flexible sealing bushing extend to the bell mouths at both ends of the intermediate tube respectively and fit with the wall surfaces of the bell mouths.

14. The thermal management assembly of claim 9, wherein: The outer peripheral surface of the end tube near the third end is a conical surface, the small diameter end of the conical surface is located at the end of the end tube away from the heat management plate connected thereto, and the large diameter end of the conical surface is interference fit with the intermediate tube.

15. The thermal management assembly of claim 3, wherein: The thermal management component is applied to a battery module, which includes a plurality of battery cell columns arranged in sequence, the plurality of thermal management plates are arranged in sequence along the arrangement direction of the plurality of battery cell columns, and a gap for placing the battery cell columns is formed between two adjacent thermal management plates.

16. The thermal management assembly according to any one of claims 1 to 15, characterized in that: The extension directions of the multiple flow channels are consistent. The multiple flow channels are arranged in sequence and spaced apart along a direction perpendicular to the extension direction of the flow channels. The multiple flow channels are symmetrically distributed on the thermal management component along a first center line, and the first center line is parallel to the extension direction of the flow channels.

17. A thermal management system, characterized in that: include: The thermal management component according to any one of claims 1 to 16, wherein the flow channel is filled with a heat exchange medium; A temperature management module is used to manage the temperature of the heat exchange medium; A main liquid inlet pipe, both ends of which are respectively connected to the temperature management module and one end of the flow channel; A main liquid outlet pipe, two ends of which are respectively connected to the temperature management module and the other end of the flow channel; A hydraulic pump is used to drive the heat exchange medium to flow.

18. The thermal management system according to claim 17, characterized in that: The thermal management system further includes a pipeline connection structure, which includes a first pipe joint, a second pipe joint and a limiting structure; a first end of the second pipe joint is plugged with one end of the first pipe joint, and a first matching structure is provided on the outer surface of the second pipe joint; one end of the limiting structure is connected to the outer peripheral surface of the first pipe joint, and a second matching structure is provided on the other end; along the plugging direction, the second matching structure is stop-matched with the first matching structure, and along the plugging direction, the second matching structure is gap-matched with the first matching structure; Wherein, the main liquid inlet pipe is connected to one end of the flow channel through the pipeline connection structure, and the main liquid outlet pipe is connected to the other end of the flow channel through the pipeline connection structure.

19. The thermal management system according to claim 18, characterized in that: The first matching structure is a first boss, the second matching structure is a second boss, and the second boss is located on a side of the first boss away from the first end; Among them, the end of the second pipe joint that is plugged into the first pipe joint is the first end, the second pipe joint has a first end face located at the first end, and the limiting structure has a first surface arranged opposite to the first end face; the distance between the side of the second boss close to the first boss and the first surface is L1, and the distance between the side of the first boss close to the second boss and the first end face is L2, satisfying: L1>L2.

20. The thermal management system according to claim 18, characterized in that The port of the main liquid inlet pipe communicating with the flow channel is a first flow channel port, the main liquid inlet pipe has two first flow channel ports, and the two first flow channel ports are respectively communicated with one end of the two flow channels through the two pipeline connection structures; The port of the main liquid outlet pipe communicating with the flow channel is a second flow channel port, and the main liquid outlet pipe has two second flow channel ports, which are respectively communicated with the other ends of the two flow channels through the two pipeline connection structures.

21. The thermal management system according to claim 20, characterized in that: The pipe connection structure is connected to a portion of the main liquid inlet pipe located between the two first flow channel openings, and the pipe connection structure is connected to a portion of the main liquid outlet pipe located between the two second flow channel openings.

22. A battery pack, characterized in that: Comprising a thermal management system as claimed in any one of claims 19 to 21.

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