Heat exchange assembly and battery pack

Abstract

The invention provides a heat exchange assembly and a battery pack, and the heat exchange assembly comprises at least two first-type heat exchange pieces which are provided with first heat exchange runners; a second heat exchange flow channel is formed in the at least one second type heat exchange piece; the first type of heat exchange pieces and the second type of heat exchange pieces are arranged at intervals in the first direction; the second heat exchange flow channel communicates with the at least two first heat exchange flow channels so as to receive the heat exchange working media in the at least two first heat exchange flow channels; the number of the first type heat exchange pieces is larger than that of the second type heat exchange pieces. The number of the first heat exchange pieces is limited to be larger than that of the second heat exchange pieces, so that the flow speed of the heat exchange working medium in the second heat exchange flow channel is larger than that of the heat exchange working medium in the first heat exchange flow channel, and heat exchange efficiency loss caused by temperature change of the heat exchange working medium is made up. Therefore, the heat exchange efficiency of the first heat exchange piece and the second heat exchange piece is balanced, the temperature uniformity of different areas in the battery pack is improved, the overall performance of the battery pack is improved, and the service life of the battery pack is prolonged.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a heat exchange assembly and a battery pack. Background Art

[0002] Currently, battery pack thermal management mainly relies on liquid heat exchange solutions. As the demand for shortening charging time increases, the heat dissipation efficiency requirements of the battery pack also increase.

[0003] In the related art, a cold plate is provided inside the battery pack to exchange heat with the battery cells. However, the current arrangement of the cold plate easily leads to a significant temperature gradient inside the battery pack, which limits the overall performance and service life of the battery pack. Summary of the Invention

[0004] The embodiments of the present application provide a heat exchange assembly and a battery pack to at least partially solve the above-mentioned technical problems.

[0005] In a first aspect, an embodiment of the present application provides a heat exchange assembly, comprising:

[0006] At least two first-type heat exchange elements, forming a first heat exchange flow channel; and

[0007] at least one second type heat exchange element, formed with a second heat exchange flow channel;

[0008] Wherein, the first type of heat exchange components and the second type of heat exchange components are spaced apart along the first direction;

[0009] The second heat exchange channel is communicated with at least two of the first heat exchange channels to receive the heat exchange medium in at least two of the first heat exchange channels; the number of the first type of heat exchange components is greater than the number of the second type of heat exchange components.

[0010] With such a solution, since the second heat exchange channel is located downstream of the first heat exchange channel, the temperature of the heat exchange medium changes after the heat exchange medium exchanges heat with the battery cell through the first heat exchange channel. By limiting the number of first-type heat exchange components to be greater than the number of second-type heat exchange components, the flow rate of the heat exchange medium in the second heat exchange channel is greater than the flow rate of the heat exchange medium in the first heat exchange channel, thereby compensating for the loss of heat exchange efficiency caused by the temperature change of the heat exchange medium, thereby balancing the heat exchange efficiency of the first-type heat exchange components and the second-type heat exchange components, improving the temperature uniformity of different areas in the battery pack, and improving the overall performance and service life of the battery pack.

[0011] Optionally, in some embodiments of the present application, the heat exchange assembly further includes:

[0012] a liquid inlet pipeline connected to the first type of heat exchange element to input a heat exchange medium into the first heat exchange channel; and

[0013] a liquid outlet pipeline connected to the second type of heat exchange element to receive the heat exchange medium in the second heat exchange flow channel;

[0014] Wherein, in a second direction intersecting with the first direction, the liquid inlet pipeline and the liquid outlet pipeline are both arranged on the same side of the whole formed by the first type heat exchange component and the second type heat exchange component.

[0015] With this solution, the liquid inlet pipeline and the liquid outlet pipeline are arranged on the same side, which facilitates the arrangement and installation of the liquid inlet pipeline and the liquid outlet pipeline.

[0016] Optionally, in some embodiments of the present application, the heat exchange assembly further includes:

[0017] a communication pipeline connected to at least two of the first-type heat exchange components and at least one of the second-type heat exchange components;

[0018] Wherein, the first type of heat exchange component is located between the liquid inlet pipeline and the connecting pipeline, and the second type of heat exchange component is located between the liquid outlet pipeline and the connecting pipeline.

[0019] By adopting this solution, the liquid inlet and outlet pipelines are arranged on one side of the whole formed by the two types of heat exchangers, and the connecting pipeline is arranged on the other side of the whole formed by the two types of heat exchangers, which facilitates the pipeline layout and installation and reduces the space occupied by the pipeline.

[0020] Optionally, in some embodiments of the present application, at least one of the first type of heat exchange component and the second type of heat exchange component includes: a flow channel plate and at least two cover plates;

[0021] The flow channel plate is arranged between the two cover plates, and a heat exchange flow channel is formed between at least one of the cover plates and the flow channel plate.

[0022] This solution, by placing the flow channel plate between the two cover plates, creates a larger heat exchange area between the two cover plates and the left and right battery cells. This allows only one heat exchange element to be placed between the two left and right battery cells, thus reducing the number of heat exchange elements used. Furthermore, the heat exchange channel is formed by the combination of the flow channel plate and the cover plates, making processing easier.

[0023] Optionally, in some embodiments of the present application, at least one of the first type of heat exchange element and the second type of heat exchange element has: a liquid inlet and a liquid outlet;

[0024] Wherein, the heat exchange channel is connected between the liquid inlet and the liquid outlet;

[0025] In a second direction intersecting with the first direction, the liquid inlet and the liquid outlet are respectively arranged at two ends of the heat exchange element.

[0026] By adopting this solution, the liquid inlet and outlet are arranged at both ends of the heat exchanger, which adapts to the spatial layout of the liquid inlet pipeline, liquid outlet pipeline and connecting pipeline, while reducing the size of both ends of the heat exchanger and facilitating the installation of the heat exchanger.

[0027] In a second aspect, an embodiment of the present application provides a battery pack comprising a housing, battery cells, and the heat exchange assembly as described above; wherein the battery cells and the heat exchange assembly are respectively installed in the housing.

[0028] With this solution, the box provides support and protection for the battery cells and heat exchange assembly. Meanwhile, the first and second heat exchange components are located inside the box, reducing heat exchange with the outside environment and improving energy efficiency with the battery cells.

[0029] Optionally, in some embodiments of the present application, the box includes:

[0030] at least two beams spaced apart along the second direction;

[0031] Wherein, an accommodation space for accommodating the battery cell is formed between two adjacent beams; the second direction intersects with the first direction;

[0032] At least one of the first type of heat exchange element and the second type of heat exchange element has:

[0033] a heat exchange region, configured to exchange heat with the battery core; and

[0034] At least two drainage areas for allowing heat exchange medium to flow into or out of the heat exchange area;

[0035] The heat exchange area is arranged between two adjacent drainage areas, and at least a portion of the heat exchange area is located in the accommodating space.

[0036] This solution allows two adjacent beams to work together to position the battery module, which consists of multiple cells. By dividing the heat exchange element into a heat exchange area and a drainage area, and placing only the heat exchange area within the storage space, the drainage area is prevented from encroaching on the storage space, increasing the cell filling rate in the storage space and improving the energy density of the battery pack.

[0037] Optionally, in some embodiments of the present application, the crossbeam has:

[0038] a clearance gap passing through the beam along the second direction;

[0039] Wherein, at least a portion of the drainage area is located in the avoidance gap.

[0040] By adopting this solution, by setting a avoidance gap in the crossbeam, the drainage area of ​​the first and second type heat exchangers is avoided, thereby preventing the crossbeam from damaging the first or second type heat exchangers when deformed by force and causing leakage.

[0041] Optionally, in some embodiments of the present application, the width of the drainage area is smaller than the width of the heat exchange area.

[0042] By adopting such a solution, by limiting the width of the drainage area to be smaller than the width of the heat exchange area, the size of the required avoidance gap can be reduced, thereby avoiding reducing the structural strength of the beam.

[0043] Optionally, in some embodiments of the present application, the ratio of the width of the heat exchange area to the width of the drainage area is in the range of 3 to 6.

[0044] By adopting such a solution, it is possible to avoid the width of the heat exchange channel in the drainage area being too narrow, thereby increasing the flow resistance. At the same time, it is possible to reduce the requirement for the size of the avoidance gap and ensure the structural strength of the beam. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. 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.

[0046] Figure 1 is a three-dimensional schematic diagram of a heat exchange assembly and a battery cell combination provided in an embodiment of the present application;

[0047] Figure 2 is a top view of a heat exchange assembly and battery cell combination provided in an embodiment of the present application;

[0048] Figure 3 is a three-dimensional schematic diagram of a heat exchange assembly provided in an embodiment of the present application;

[0049] Figure 4 is a top view of a heat exchange assembly provided in an embodiment of the present application;

[0050] Figure 5 is a top view of a first type of heat exchange component or a second type of heat exchange component in a heat exchange assembly provided in an embodiment of the present application;

[0051] Figure 6 is an exploded view of a first type of heat exchange component or a second type of heat exchange component in a heat exchange assembly provided in an embodiment of the present application;

[0052] Figure 7Schematic diagram of the flow path of the first type of heat exchange element or the second type of heat exchange element in the heat exchange assembly provided in the embodiment of the present application;

[0053] Figure 8 yes Figure 7 Enlarged view of part A;

[0054] Figure 9 is a three-dimensional schematic diagram of a battery pack provided in an embodiment of the present application;

[0055] Figure 10 yes Figure 9 Enlarged view of part B;

[0056] Figure 11 This is a schematic diagram showing the matching relationship between the box and the first type of heat exchange element or the second type of heat exchange element in the battery pack provided in the embodiment of the present application;

[0057] Figure 12 It is a three-dimensional schematic diagram of the box in the battery pack provided in the embodiment of the present application.

[0058] Description of reference numerals:

[0059] 100. Heat exchange assembly; 100a. Installation space;

[0060] 110, first type heat exchange element; 110a, first heat exchange channel; 110b, first liquid inlet; 110c, first liquid outlet;

[0061] 111. First flow channel plate; 112. First cover plate;

[0062] N1, first heat exchange area; N2, first drainage area;

[0063] 120, second type heat exchange element; 120a, second heat exchange channel; 120b, second liquid inlet; 120c, second liquid outlet;

[0064] 121. Second flow channel plate; 122. Second cover plate;

[0065] M1, second heat exchange area; M2, second drainage area;

[0066] 131. Liquid inlet pipeline; 132. Liquid outlet pipeline;

[0067] 133. First external connector; 134. Second external connector;

[0068] 140. Connecting pipe; 150. Drainage joint;

[0069] 10. Battery pack; 210. Box body; 210a. Accommodation space; 211. Crossbeam; 211a. Avoidance gap; 220. Battery cell. DETAILED DESCRIPTION

[0070] 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, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of this application. 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.

[0071] In this application, unless otherwise indicated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of a device in actual use or operation, specifically in the drawing directions of the accompanying drawings; whereas "inner" and "outer" refer to the outline of the device. Furthermore, in the description of this application, the term "including" means "including but not limited to." Terms such as first, second, and third are used merely as labels and do not impose numerical requirements or establish a sequence.

[0072] In this application, "and / or" describes the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. A and B can be singular or plural.

[0073] First, refer to Figures 1 to 4 、 Figure 7 The present application provides a heat exchange assembly 100 , comprising: a first type of heat exchange component 110 and a second type of heat exchange component 120 .

[0074] There are at least two first-type heat exchange elements 110, and the first-type heat exchange elements 110 form a first heat exchange channel 110a; there is at least one second-type heat exchange element 120, and the second-type heat exchange element 120 forms a second heat exchange channel 120a; the first-type heat exchange elements 110 and the second-type heat exchange elements 120 are arranged at intervals along the first direction, so that an installation space 100a for accommodating the battery cell 220 is formed between two adjacent first-type heat exchange elements 110, between two adjacent second-type heat exchange elements 120, and between at least one adjacent first-type heat exchange element 110 and second-type heat exchange element 120.

[0075] The second heat exchange channel 120a is in communication with at least two first heat exchange channels 110a to receive the heat exchange medium in the at least two first heat exchange channels 110a; the number of the first type of heat exchange elements 110 is greater than the number of the second type of heat exchange elements 120.

[0076] It can be understood that since the second heat exchange channel 120a is located downstream of the first heat exchange channel 110a, the temperature of the heat exchange medium changes (increases or decreases) after the heat exchange medium passes through the first heat exchange channel 110a and exchanges heat with the battery cell 220. By limiting the number of first-type heat exchange elements 110 to be greater than the number of second-type heat exchange elements 120, the flow rate of the heat exchange medium in the second heat exchange channel 120a is greater than the flow rate of the heat exchange medium in the first heat exchange channel 110a, thereby compensating for the loss of heat exchange efficiency caused by the temperature change of the heat exchange medium, thereby balancing the heat exchange efficiency of the first-type heat exchange elements 110 and the second-type heat exchange elements 120, improving the temperature uniformity of different areas in the battery pack 10, and improving the overall performance and service life of the battery pack 10.

[0077] It should be noted that the first direction here indicates the left-right direction only for the convenience of describing the specific embodiments of this application. There is no absolute correspondence between the first direction and the left-right direction. Similarly, there is no absolute correspondence between the second direction and the front-back direction, and the third direction and the up-down direction. Furthermore, the first, second, and third directions of this application are only used to express relative positional relationships. They only indicate approximate directions, not absolute geometric relationships.

[0078] In the arrangement of the heat exchanger in the embodiment of the present application, the heat exchanger contacts the left and right sides of the battery cell 220 for heat exchange, resulting in a short heat transfer path and a high temperature regulation efficiency for the battery cell 220. On this basis, the heat exchange assembly 100 in the embodiment of the present application can be applied to battery cells 220 with larger heights, such as the battery cells 220 in the power battery of a commercial vehicle. As the height of the battery cell 220 increases, the heat exchange area between the heat exchanger and the battery cell 220 also increases, which can effectively shorten the heat transfer distance. Moreover, in the case of side heat exchange, the heat exchanger is closer to the pole and tab at the top of the battery cell 220, which can reduce the temperature of the top of the battery cell 220 during fast charging, reduce the overall temperature difference of the battery cell 220, and improve the cycle life of the battery cell 220.

[0079] In an example of this application, refer to Figures 1 to 4 The number of the first type of heat exchange elements 110 is 3, and the number of the second type of heat exchange elements 120 is 2. In this way, while ensuring the uniformity of heat exchange, it is possible to avoid excessively increasing the overall width of the heat exchange elements and the battery cells 220 in the left and right directions.

[0080] In some specific embodiments, all first-type heat exchangers 110 are located on the same side of the entire assembly formed by all second-type heat exchangers 120, facilitating the arrangement and installation of the two types of heat exchangers. Alternatively, the first-type heat exchangers 110 and the second-type heat exchangers 120 can be arranged alternately, such that, in the first direction, one side of the same battery cell 220 is provided with a first-type heat exchanger 110 and the other side is provided with a second-type heat exchanger 120, further improving the temperature uniformity of each battery cell 220.

[0081] In some embodiments of the present application, referring to Figures 1 to 4 , the heat exchange assembly 100 further comprises an inlet pipe 131 and an outlet pipe 132.

[0082] The inlet pipe 131 is connected with the first heat exchange element 110 to input the heat exchange medium into the first heat exchange channel 110a; the outlet pipe 132 is connected with the second heat exchange element 120 to receive the heat exchange medium in the second heat exchange channel 120a; in the second direction intersecting with the first direction, the inlet pipe 131 and the outlet pipe 132 are both arranged on the same side of the whole formed by the first heat exchange element 110 and the second heat exchange element 120. By adopting such a scheme, the inlet pipe 131 and the outlet pipe 132 are arranged on the same side, which facilitates the arrangement and installation of the inlet pipe 131 and the outlet pipe 132.

[0083] In some specific embodiments, referring to Figure 3 and Figure 4 , at least two first heat exchange elements 110 are connected to the same inlet pipe 131, so that the flow rates and pressures at the entrances of different first heat exchange channels 110a tend to be consistent. At least one second heat exchange element 120 is connected to the same outlet pipe 132, so that the flow rates and pressures at the outlets of different second heat exchange channels 120a tend to be consistent. By adopting such a connection scheme, the flow rates in different first heat exchange channels 110a can tend to be consistent, and the flow rates in different second heat exchange channels 120a can tend to be consistent, further improving the uniformity of heat exchange, and simplifying the arrangement of the inlet pipe 131 and the outlet pipe 132.

[0084] In some specific embodiments, at least part of the inlet pipe 131 is made of a nylon pipe, so that the inlet pipe 131 can better adapt to the positions of different first heat exchange elements 110; at least part of the outlet pipe 132 is made of a nylon pipe, so that the outlet pipe 132 can better adapt to the positions of different second heat exchange elements 120.

[0085] In some embodiments of the present application, referring to Figure 3 and Figure 4 , the inlet pipe 131 is connected with an external pipe through a first external connector 133, and the outlet pipe 132 is connected with an external pipe through a second external connector 134; more specifically, the first external connector 133 and the second external connector 134 are respectively flange joints, which are convenient to connect.

[0086] In some embodiments of the present application, referring to Figure 3 and Figure 4 , the heat exchange assembly 100 further comprises a communication pipe 140.

[0087] The connecting pipeline 140 is connected to at least two first-type heat exchange components 110 and at least one second-type heat exchange component 120 to form a connection between the first heat exchange channel 110a and the second heat exchange channel 120a; the first-type heat exchange component 110 is located between the liquid inlet pipeline 131 and the connecting pipeline 140, and the second-type heat exchange component 120 is located between the liquid outlet pipeline 132 and the connecting pipeline 140.

[0088] By adopting this solution, the liquid inlet pipeline 131 and the liquid outlet pipeline 132 are arranged on one side of the whole formed by the two types of heat exchange components, and the connecting pipeline 140 is arranged on the other side of the whole formed by the two types of heat exchange components, which facilitates the pipeline layout and installation and reduces the space occupied by the pipeline.

[0089] In some specific embodiments, the number of the connecting pipe 140 can be one or at least two, as long as the number of the first type heat exchangers 110 connected to the same connecting pipe 140 is greater than the number of the second type heat exchangers 120 connected to it.

[0090] In an example of this application, refer to Figure 3 and Figure 4 The first type heat exchanger 110 and the second type heat exchanger 120 are both connected to the same connecting pipe 140, further improving the uniformity of the flow rate of each first type heat exchanger 110 and the uniformity of the flow rate of each second type heat exchanger 120.

[0091] In some specific embodiments, at least a portion of the connecting pipe 140 is made of a nylon tube, so that the connecting pipe 140 can better adapt to the positions of the connected first type heat exchange component 110 and the second type heat exchange component 120.

[0092] In some embodiments of the present application, reference Figure 6 and Figure 7 The first type heat exchange element 110 includes a first flow channel plate 111 and at least two first cover plates 112. The first flow channel plate 111 is disposed between the two first cover plates 112. The heat exchange channel of the first type heat exchange element 110 is formed with at least one first cover plate 112 and the first flow channel plate 111.

[0093] It is understood that the first heat exchange channel 110a is stamped from at least the first channel plate 111, while the first cover plate 112 covers the first channel plate 111, isolating the first heat exchange channel 110a from the outside. The side of the first cover plate 112 facing away from the first channel plate 111 has a flat heat exchange surface, which contacts and exchanges heat with the battery cells 220. This increases the heat exchange area between the first type heat exchange element 110 and the battery cells 220.

[0094] In some embodiments of the present application, reference Figure 6 and Figure 7The second type heat exchange element 120 includes a second flow channel plate 121 and at least two second cover plates 122. The second flow channel plate 121 is disposed between the two second cover plates 122. The heat exchange channel of the second type heat exchange element 120 is formed with at least one second cover plate 122 and the second flow channel plate 121.

[0095] It is understood that the second heat exchange channel 120a is stamped and formed from at least the second channel plate 121, while the second cover plate 122 covers the second channel plate 121, isolating the second heat exchange channel 120a from the outside. The side of the second cover plate 122 facing away from the second channel plate 121 has a flat heat exchange surface, which contacts and exchanges heat with the battery cells 220. This increases the heat exchange area between the second type heat exchange element 120 and the battery cells 220.

[0096] By adopting the above-mentioned design of the first type of heat exchange element 110 and the second type of heat exchange element 120, and by placing the flow channel plate between the two cover plates, the two cover plates of the heat exchange element and the left and right battery cells 220 have a larger heat exchange area. Therefore, only one heat exchange element is required between the two battery cells 220 in the left and right directions to meet the heat exchange requirements, thus reducing the number of heat exchange elements used. Furthermore, the heat exchange flow channel is formed by the cooperation of the flow channel plate and the cover plate, which facilitates processing.

[0097] In an example of the present application, in all heat exchange components, the flow channel plate and one of the cover plates form a heat exchange flow channel.

[0098] In another example of the present application, in all heat exchange components, the flow channel plate and the cover plates on both sides are respectively formed with heat exchange flow channels.

[0099] In another example of the present application, the flow channel plate in the heat exchange component located between the two battery cells 220 and the cover plates on both sides are respectively formed with heat exchange channels, which increase the heat exchange area between the heat exchange medium and the flow channel plate and the cover plate to enhance the heat exchange effect, while the heat exchange component located at the edge only forms a heat exchange channel on the side close to the battery cell 220.

[0100] In some specific embodiments, the flow channel plate and the cover plate can be fixed into a whole by fasteners or welding; or, the flow channel plate and the cover plate can be formed as one piece, and after the flow channel plate is stamped and formed, the two are folded to form the main body.

[0101] In some embodiments of the present application, reference Figure 7 The first type heat exchange element 110 has a first liquid inlet 110b and a first liquid outlet 110c. The first heat exchange channel 110a connects the first liquid inlet 110b and the first liquid outlet 110c. In a second direction intersecting the first direction, the first liquid inlet 110b and the first liquid outlet 110c are located at opposite ends of the first type heat exchange element 110.

[0102] Specifically, the first liquid inlet 110b is connected to the liquid inlet pipeline 131, and the first liquid outlet 110c is connected to the communication pipeline 140.

[0103] In some embodiments of the present application, referring to Figure 7 , the second heat exchange member 120 has a second liquid inlet 120b and a second liquid outlet 120c, and a second heat exchange channel 120a is connected between the second liquid inlet 120b and the second liquid outlet 120c. In a second direction intersecting the first direction, the second liquid inlet 120b and the second liquid outlet 120c are arranged at two ends of the second heat exchange member 120.

[0104] Specifically, the second liquid inlet 120b is connected to the communication pipeline 140, and the second liquid outlet 120c is connected to the liquid inlet pipeline 131.

[0105] With such a scheme, by arranging the liquid inlet and the liquid outlet at two ends of the heat exchange member, the spatial arrangement of the liquid inlet pipeline 131, the liquid outlet pipeline 132, and the communication pipeline 140 can be adapted, while the size of the two ends of the heat exchange member can be reduced, facilitating the installation of the heat exchange member.

[0106] In some specific embodiments, the second direction and the first direction are arranged obliquely or perpendicularly to each other.

[0107] In an example of the present application, the second direction and the first direction are arranged perpendicularly to each other.

[0108] In a second aspect, referring to Figure 9 , the present application provides a battery pack 10, which comprises a box body 210, a battery cell 220, and a heat exchange assembly 100 as described above; wherein the battery cell 220 and the heat exchange assembly 100 are respectively installed in the box body 210, so that the box body 210 provides support and protection for the battery cell 220 and the heat exchange assembly 100. At the same time, the first heat exchange member 110 and the second heat exchange member 120 in the battery pack 10 of the present application are located inside the box body 210, reducing heat exchange with the external environment and improving the energy efficiency with the battery cell 220.

[0109] In an example of the present application, the battery pack 10 can be a power battery of a vehicle.

[0110] In some specific embodiments, the first heat exchange member 110 and the second heat exchange member 120 can be bonded to the battery cell 220 through a heat-conducting adhesive, improving the heat transfer efficiency while providing cushioning.

[0111] In some embodiments of the present application, referring to Figures 10 to 12The housing 210 includes a crossbeam 211. At least two crossbeams 211 are spaced apart along the second direction. An accommodating space 210a for accommodating a battery cell 220 is formed between two adjacent crossbeams 211. The two adjacent crossbeams 211 cooperate to limit the position of the battery module composed of multiple battery cells 220. The second direction intersects the first direction.

[0112] In some embodiments of the present application, reference Figure 5 and Figure 11 The first-type heat exchange element 110 comprises a first heat exchange region N1 and at least two first drainage regions N2. The first heat exchange region N1 is used to exchange heat with the battery cell 220. There are at least two first drainage regions N2, each for allowing heat exchange medium to flow into or out of the first heat exchange region N1. The first heat exchange region N1 is positioned between two adjacent first drainage regions N2, with at least a portion of the first heat exchange region N1 located within the accommodation space 210a.

[0113] In some embodiments of the present application, reference Figure 5 and Figure 11 The second-type heat exchange element 120 comprises a second heat exchange region M1 and at least two second drainage regions M2. The second heat exchange region M1 is used to exchange heat with the battery cell 220. There are at least two second drainage regions M2, each for allowing the heat exchange medium to flow into or out of the second heat exchange region M1. The second heat exchange region M1 is positioned between two adjacent second drainage regions M2, with at least a portion of the second heat exchange region M1 located within the accommodation space 210a.

[0114] It is understandable that the number of the crossbeams 211 can be designed according to the specifications of the battery pack 10. In the same heat exchange element, the liquid inlet is arranged in one drainage area, and the liquid outlet is arranged in another drainage area.

[0115] By adopting the above solution, the heat exchange component is divided into a heat exchange area and a drainage area, and only the heat exchange area is set in the accommodating space 210a, thereby avoiding the drainage area from occupying the accommodating space 210a, increasing the filling degree of the battery cells 220 in the accommodating space 210a, and improving the energy density of the battery pack 10.

[0116] In some specific embodiments, the shape of the heat exchange channel in the heat exchange area can be one or more of S-shaped, bow-shaped, M-shaped, wavy, etc., while the shape of the heat exchange channel in the drainage area is straight-line, so that the size of the drainage area can be reduced.

[0117] In an example of this application, refer to Figure 12Three cross beams 211 are set in the box body 210. Accordingly, each heat exchanger has two heat exchange areas and three drainage areas. The drainage area in the middle is used to connect the two heat exchange areas, and the drainage areas on both sides are used to set the liquid inlet or liquid outlet; the three drainage areas correspond one to one with the three cross beams 211, further avoiding the drainage area occupying the accommodation space 210a.

[0118] In some specific embodiments, the cross beam 211 may be an expansion beam, which can suppress the expansion of the battery cell 220 during the charging and discharging process.

[0119] In some embodiments of the present application, reference Figures 10 to 12 The crossbeam 211 has a position-avoiding notch 211 a that penetrates the crossbeam 211 along the second direction; at least a portion of the drainage area is located in the position-avoiding notch 211 a.

[0120] It can be understood that the crossbeam 211 is provided with a plurality of avoidance notches 211 a at intervals along the first direction to correspondingly avoid the first type of heat exchange components 110 and the second type of heat exchange components 120 .

[0121] By adopting this solution, a avoidance notch 211a is provided in the crossbeam 211 to avoid the drainage area of ​​the first type heat exchanger 110 and the second type heat exchanger 120, thereby preventing the crossbeam 211 from damaging the first type heat exchanger 110 or the second type heat exchanger 120 when deformed by force and causing leakage.

[0122] In some specific embodiments, reference Figure 6 The first drainage region N2 at the end of the first-type heat exchange element 110 is connected to a drainage joint 150. The drainage joint 150 corresponding to the first-type heat exchange element 110 is connected to the liquid inlet pipeline 131 or the connecting pipeline 140. Similarly, the second drainage region M2 at the end of the second-type heat exchange element 120 is also connected to another drainage joint 150. The drainage joint 150 corresponding to the second-type heat exchange element 120 is connected to the liquid outlet pipeline 132 or the connecting pipeline 140.

[0123] Specifically, at least a portion of the drainage connector 150 is located in the avoidance gap 211 a , preventing the drainage connector 150 from occupying the accommodation space 210 a .

[0124] In some embodiments of the present application, reference Figure 5 The width of the first drainage area N2 is smaller than that of the first heat exchange area N1. The width of the second drainage area M2 is smaller than that of the second heat exchange area M1.

[0125] It can be understood that the width L1 of the drainage area is the edge distance of the drainage area in the third direction (vertical direction), and the width L2 of the heat exchange area is the edge distance of the heat exchange area in the third direction (vertical direction).

[0126] By adopting such a solution, by limiting the width of the drainage area to be smaller than the width of the heat exchange area, the size of the required avoidance gap 211 a can be reduced, thereby avoiding reducing the structural strength of the beam 211.

[0127] Reference Figure 7 and Figure 8 Combined with the above arrangement of the liquid inlet and the liquid outlet being respectively arranged at both ends of the first type heat exchange element 110 or the second type heat exchange element 120, the heat exchange flow channel has only a straight flow channel section in each drainage area, which can reduce the width of each drainage area in the up and down directions. Correspondingly, the depth required for the avoidance notch 211a can be reduced, thereby ensuring the structural strength of the beam 211.

[0128] In some embodiments of the present application, the ratio of the width of the first heat exchange region N1 to the width of the first drainage region N2 ranges from 3 to 6. The ratio of the width of the second heat exchange region M1 to the width of the second drainage region M2 ranges from 3 to 6.

[0129] It can be understood that the ratio of the width of the heat exchange area to the width of the drainage area can be one of 3 to 4, 4 to 5, or 5 to 6.

[0130] By adopting such a ratio, the width of the heat exchange channel in the drainage area can be prevented from being too narrow, thereby increasing the flow resistance. At the same time, the requirement for the size of the avoidance gap 211 a can be reduced, thereby ensuring the structural strength of the beam 211 .

[0131] In some specific embodiments, reference Figure 5 and Figure 8 The width L3 of the heat exchange channel in the drainage area ranges from 10 mm to 25 mm, and the width L1 of the drainage area ranges from 21 mm to 36 mm.

[0132] The above is a detailed introduction to the embodiments of the present application. Specific examples are used herein 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 those skilled in the art, based on the ideas of the present application, there may be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A heat exchange assembly (100), characterized in that: include: At least two first-type heat exchange components (110) are formed with first heat exchange channels (110a); and at least one second type heat exchange element (120) formed with a second heat exchange flow channel (120a); Wherein, the first type of heat exchange component (110) and the second type of heat exchange component (120) are arranged at intervals along a first direction; The second heat exchange channel (120a) is in communication with at least two of the first heat exchange channels (110a) to receive the heat exchange medium in the at least two of the first heat exchange channels (110a); and the number of the first type of heat exchange components (110) is greater than the number of the second type of heat exchange components (120).

2. The heat exchange assembly (100) according to claim 1, characterized in that: The heat exchange assembly (100) further includes: a liquid inlet pipeline (131) connected to the first type of heat exchange element (110) to input heat exchange medium into the first heat exchange flow channel (110a); and a liquid outlet pipeline (132) connected to the second type of heat exchange element (120) to receive the heat exchange medium in the second heat exchange channel (120a); Wherein, in a second direction intersecting with the first direction, the liquid inlet pipeline (131) and the liquid outlet pipeline (132) are both arranged on the same side of the whole formed by the first type heat exchange component (110) and the second type heat exchange component (120).

3. The heat exchange assembly (100) according to claim 2, characterized in that: The heat exchange assembly (100) further includes: a communication pipeline (140) connected to at least two of the first-type heat exchange components (110) and at least one of the second-type heat exchange components (120); The first type of heat exchange component (110) is located between the liquid inlet pipeline (131) and the connecting pipeline (140), and the second type of heat exchange component (120) is located between the liquid outlet pipeline (132) and the connecting pipeline (140).

4. The heat exchange assembly (100) according to any one of claims 1 to 3, characterized in that: At least one of the first type of heat exchange component (110) and the second type of heat exchange component (120) comprises: a flow channel plate and at least two cover plates; The flow channel plate is arranged between the two cover plates, and a heat exchange flow channel is formed between at least one of the cover plates and the flow channel plate.

5. The heat exchange assembly (100) according to any one of claims 1 to 3, characterized in that: At least one of the first type heat exchange element (110) and the second type heat exchange element (120) has: a liquid inlet and a liquid outlet; Wherein, the heat exchange channel is connected between the liquid inlet and the liquid outlet; In a second direction intersecting with the first direction, the liquid inlet and the liquid outlet are respectively arranged at two ends of the heat exchange element.

6. A battery pack (10), characterized in that: It comprises a box (210), a battery cell (220), and a heat exchange assembly (100) according to any one of claims 1 to 5; The battery core (220) and the heat exchange assembly (100) are respectively installed in the box (210).

7. The battery pack (10) according to claim 6, characterized in that: The box (210) includes: At least two cross beams (211) are spaced apart along the second direction; Wherein, an accommodating space (210a) for accommodating the battery core (220) is formed between two adjacent beams (211); the second direction intersects with the first direction; At least one of the first type heat exchange element (110) and the second type heat exchange element (120) has: a heat exchange region, used for exchanging heat with the battery core (220); and At least two drainage areas for allowing heat exchange medium to flow into or out of the heat exchange area; The heat exchange area is arranged between two adjacent drainage areas, and at least a portion of the heat exchange area is located in the accommodating space (210a).

8. The battery pack (10) according to claim 7, characterized in that: The crossbeam (211) has: a position-avoiding notch (211a) passing through the crossbeam (211) along the second direction; Wherein, at least a portion of the drainage area is located in the avoidance gap (211a).

9. The battery pack (10) according to claim 7, characterized in that: The width of the drainage area is smaller than the width of the heat exchange area.

10. The battery pack (10) according to claim 9, characterized in that: The ratio of the width of the heat exchange area to the width of the drainage area ranges from 3 to 6.

Images