Heat exchanger, battery pack and electric equipment

Abstract

The utility model belongs to the technical field of battery packs, and provides a heat exchanger, a battery pack and electric equipment. The heat exchanger comprises an inlet, an outlet and a heat exchange module, the heat exchange module comprises a plurality of inflow runners, a plurality of outflow runners and a plurality of heat exchange areas, and the inflow runners communicate with the inlet; the plurality of outflow runners are communicated with the outlet; the heat exchange area is used for exchanging heat with the battery cell module, and the heat exchange area corresponds to the at least one inflow runner and corresponds to the at least one outflow runner; the heat exchange area comprises a plurality of sub-runners, the inlet ends of the sub-runners communicate with the inflow runner corresponding to the heat exchange area, and the outlet ends of the sub-runners communicate with the outflow runner corresponding to the heat exchange area. The flow resistance of cooling liquid flowing in the heat exchanger is small.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery pack, and in particular to a heat exchanger, a battery pack and an electric device. BACKGROUND

[0002] The battery pack includes a plurality of battery cell modules, and a heat exchanger is usually arranged in the battery pack to exchange heat with the battery cell modules.

[0003] The battery cell module has a region to be exchanged, and the heat exchanger is provided with a flow channel, which includes an inlet, a circulation pipeline and an outlet connected in sequence. The circulation pipeline can be arranged in an S shape or other back-and-forth bending shape to cover the region to be exchanged of the battery cell module. The heat exchange medium enters the circulation pipeline from the inlet, flows in the circulation pipeline, and can radiate or heat the region to be exchanged, and then flows out from the outlet.

[0004] In the related art, the flow resistance of the heat exchange medium in the circulation pipeline is large. UTILITY MODEL CONTENT

[0005] The present application provides a heat exchanger, a battery pack and an electric device, and the flow resistance of the cooling liquid in the heat exchanger is small.

[0006] The present application provides a heat exchanger, which includes an inlet, an outlet and a heat exchange module. The heat exchange module includes a plurality of inlet flow channels, a plurality of outlet flow channels and a plurality of heat exchange regions. The plurality of inlet flow channels are in communication with the inlet. The plurality of outlet flow channels are in communication with the outlet. The heat exchange region is used to exchange heat with the battery cell module. The heat exchange region is provided in correspondence with at least one inlet flow channel and at least one outlet flow channel. The heat exchange region includes a plurality of sub-flow channels. The inlet end of the plurality of sub-flow channels is in communication with the inlet flow channel corresponding to the heat exchange region. The outlet end of the plurality of sub-flow channels is in communication with the outlet flow channel corresponding to the heat exchange region.

[0007] In a possible implementation, the heat exchanger provided by the present application includes at least two inlet flow branches in at least part of the inlet flow channels, and / or at least two outlet flow branches in at least part of the outlet flow channels.

[0008] In a possible implementation, the heat exchanger provided by the present application includes at least two sub-flow branches in at least part of the sub-flow channels.

[0009] In a possible implementation, the heat exchanger provided by the present application includes a plurality of sub-flow channels in each heat exchange region arranged along a first direction. The sub-flow channel includes an inlet section, a connecting section and an outlet section connected in sequence. The inlet section and the outlet section extend along a second direction. The inlet section is connected to the inlet end. The outlet section is connected to the outlet end.

[0010] In a possible implementation, the heat exchanger provided in the present application, in the two adjacent branch channels, the inflow section of one branch channel is adjacent to the outflow section of the other branch channel.

[0011] In a possible implementation, the heat exchanger provided in the present application, the connecting section bending disc is arranged between the inflow section and the outflow section.

[0012] In a possible implementation, the heat exchanger provided in the present application, the heat exchange region further comprises at least one first heat exchange flow channel, the first heat exchange flow channel extends along the second direction, and the first heat exchange flow channel is arranged close to the at least one branch channel; one end of the first heat exchange flow channel is in communication with the inflow flow channel, and the other end is in communication with the outflow flow channel.

[0013] In a possible implementation, the heat exchanger provided in the present application, the first heat exchange flow channel comprises at least two first heat exchange branches.

[0014] In a possible implementation, the heat exchanger provided in the present application, the first heat exchange flow channel is arranged to be staggered with the battery cell module on the projection of the battery cell module.

[0015] In a possible implementation, the heat exchanger provided in the present application, the plurality of inflow flow channels, the plurality of heat exchange regions and the plurality of outflow flow channels form a plurality of heat dissipation loops, and the plurality of heat dissipation loops are arranged in layers.

[0016] In a possible implementation, the heat exchanger provided in the present application, further comprising a second heat exchange flow channel, the second heat exchange flow channel is arranged outside the heat exchange module, one end of the second heat exchange flow channel is connected with the inlet, and the other end of the second heat exchange flow channel is connected with the outlet.

[0017] In a possible implementation, the heat exchanger provided in the present application, the second heat exchange flow channel is arranged to be staggered with the battery cell module on the projection of the battery cell module.

[0018] In a possible implementation, the heat exchanger provided in the present application, the second heat exchange flow channel comprises at least two second heat exchange branches.

[0019] In a possible implementation, the heat exchanger provided in the present application, further comprising a first adapter pipe, one end of the first adapter pipe is connected with the inlet, and the other end of the first adapter pipe is provided with a medium inlet, and / or, further comprising a second adapter pipe, one end of the second adapter pipe is connected with the outlet, and the other end of the second adapter pipe is provided with a medium outlet.

[0020] In a possible implementation, the first adapter pipe is inclined relative to the plane formed by the first direction and the second direction and extends in a direction away from the heat exchange module, and / or,

[0021] The second adapter pipe is inclined relative to the plane formed by the first direction and the second direction and extends in a direction away from the heat exchange module.

[0022] In a possible implementation, the heat exchanger provided in the application is characterized in that the projection of the first adapter pipe and / or the second adapter pipe on the battery cell module is offset from the battery cell module.

[0023] The application further provides a battery pack comprising a plurality of battery cell modules and the heat exchanger, the battery cell modules being arranged in a first direction or a second direction, and the heat exchanger being arranged on the end surface of the battery cell modules in a third direction.

[0024] In a possible implementation, the battery pack provided in the application is characterized in that the number of heat exchangers is two, and the two heat exchangers are arranged at the two ends of the battery cell modules in the third direction.

[0025] The application further provides a use-electricity device comprising the battery pack or the heat exchanger.

[0026] The heat exchanger provided in the application is characterized in that the heat exchanger comprises an inlet, an outlet and a heat exchange module, the heat exchange module comprising a plurality of inlet flow channels, a plurality of outlet flow channels and a plurality of heat exchange regions, the plurality of inlet flow channels being in communication with the inlet, the plurality of outlet flow channels being in communication with the outlet, and the heat exchange regions being used for heat exchange with the battery cell modules, the heat exchange regions being arranged in correspondence with at least one inlet flow channel and at least one outlet flow channel. In this way, a plurality of parallel heat dissipation circuits can be formed to reduce the flow resistance of the cooling liquid. The heat exchange region comprises a plurality of branch flow channels, the inlet ends of the plurality of branch flow channels being in communication with the inlet flow channel corresponding to the heat exchange region, and the outlet ends of the plurality of branch flow channels being in communication with the outlet flow channel corresponding to the heat exchange region. In this way, a plurality of parallel heat dissipation circuits can be formed again to further reduce the flow resistance of the cooling liquid. That is, the heat exchanger can reduce the flow resistance of the cooling liquid as much as possible by arranging two-stage parallel circuits. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0028] Figure 1 The battery pack structure schematic diagram provided in the embodiments of the application;

[0029] Figure 2 The structure schematic diagram of the heat exchanger provided in the embodiments of the application;

[0030] Figure 3 The structure schematic diagram of the heat exchanger provided in the embodiments of the application; Figure 2 The enlarged view of A in FIG. 6;

[0031] Figure 4Another structural schematic view of the heat exchanger provided in the embodiments of the present application;

[0032] Figure 5 For Figure 2 Another enlarged view of A in FIG. 1;

[0033] Figure 6 For Figure 2 Enlarged view of B in FIG. 1.

[0034] Legend of reference signs:

[0035] 10 - battery pack;

[0036] 100 - heat exchanger;

[0037] 110 - inlet;

[0038] 120 - outlet;

[0039] 130 - heat exchange module; 130a - first heat dissipation loop; 130b - second heat dissipation loop; 130c - third heat dissipation loop; 130d - fourth heat dissipation loop;

[0040] 131 - inlet flow channel; 131a - first inlet flow channel; 131b - second inlet flow channel; 131c - third inlet flow channel; 131d - fourth inlet flow channel; 1311 - inlet flow branch;

[0041] 132 - outlet flow channel; 132a - first outlet flow channel; 132b - second outlet flow channel; 132c - third outlet flow channel; 132d - fourth outlet flow channel; 1321 - outlet flow branch;

[0042] 133 - heat exchange region; 133a - first heat exchange region; 133b - second heat exchange region; 133c - third heat exchange region; 133d - fourth heat exchange region;

[0043] 1331 - flow distribution channel; 1331a - first flow distribution channel; 1331b - second flow distribution channel; 1331c - third flow distribution channel; 1331d - fourth flow distribution channel;

[0044] 1332 - inlet end; 1333 - outlet end; 1334 - flow distribution branch; 1335 - inlet flow section; 1336 - connecting section; 1337 - outlet flow section;

[0045] 134 - first heat exchange flow channel; 1341 - first heat exchange branch;

[0046] 141 - second heat exchange flow channel; 1411 - second heat exchange branch;

[0047] 150 - first adapter pipe;

[0048] 160 - second adapter pipe;

[0049] 170 - media inlet;

[0050] 180 - media outlet;

[0051] 200 - cell module;

[0052] D1 - gap;

[0053] X - first direction;

[0054] Y - second direction;

[0055] Z - third direction. DETAILED DESCRIPTION

[0056] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0057] In the description of the present application, it should be noted that unless specifically defined and limited, the terms “mounting”, “connection”, “connecting” should be understood in a broad sense, for example, can be fixedly connected, can be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0058] In the description of the present application, it should be understood that the terms “upper”, “lower”, “front”, “back”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer” and the like indicate the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0059] The terms “first”, “second”, “third” (if any) in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily have to describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0060] Moreover, the terms "comprising" and "having" and any variations thereof are intended to cover a non-exclusive inclusion, for example, a process, method, system, product or article of manufacture that includes a series of steps or units not necessarily in any explicitly listed order, and can include additional steps or units not explicitly listed or inherent to such process, method, product or article of manufacture.

[0061] The battery pack includes a plurality of battery cell modules, which generate heat during operation. A heat exchanger can be provided in the battery pack to remove the heat generated by the battery cell modules during operation.

[0062] The battery cell module has a region to be cooled, and the heat exchanger has a flow channel including an inlet, a circulation pipeline and an outlet connected in sequence. The circulation pipeline can be arranged in an S shape or other back-and-forth bending shape to cover the region to be cooled of the battery cell module. The cooling liquid enters the circulation pipeline from the inlet, flows in the circulation pipeline to remove the heat of the region to be cooled, and then over-heated cooling liquid flows out of the outlet.

[0063] The circulation pipeline usually needs to cover the entire region to be cooled of the battery cell module. The circulation pipeline is arranged in a bending shape to make the path of the circulation pipeline longer, and the flow resistance of the cooling liquid in the circulation pipeline increases with the lengthening of the path of the circulation pipeline. When the flow resistance of the cooling liquid in the circulation pipeline increases, the cost of driving the cooling liquid to flow by the air conditioning system in the vehicle is higher. In addition, the cooling liquid at the rear end of the flow path of the circulation pipeline vaporizes, and the vaporized cooling liquid further increases the flow resistance. When the path of the circulation pipeline is longer, the temperature at the rear end of the flow path of the circulation pipeline is higher, which is not conducive to the heat dissipation of the battery cell module. When the temperature at the rear end of the flow path of the circulation pipeline is higher, the temperature difference between the front end and the rear end of the path is larger, which is not conducive to the connection of the heat exchanger and the air conditioning system.

[0064] Therefore, the embodiments of the present application provide a heat exchanger, a battery pack and an electric device, in which the flow resistance of the cooling liquid in the heat exchanger is smaller.

[0065] Figure 1 The battery pack structure provided by the embodiments of the present application is shown in the schematic diagram.

[0066] Referring to Figure 1 As shown in the figure, the battery pack 10 includes a heat exchanger 100 and a plurality of battery cell modules 200. The battery cell modules 200 are arranged at intervals along a first direction X or a second direction Y, and the heat exchanger 100 is arranged on the surface of the battery cell modules 200 along a third direction Z.

[0067] Specifically, the battery pack 10 can be a cuboid, and the battery pack 10 has a length direction, a width direction and a height direction. The length direction is shown by the first direction X, the width direction is shown by the second direction Y, and the height direction is shown by the third direction Z.

[0068] The battery pack 10 can include one battery cell module 200, or can include a plurality of battery cell modules 200, in Figure 1 In the embodiment shown, the battery pack 10 includes a plurality of battery cell modules 200, and the plurality of battery cell modules 200 are arranged in a matrix along the first direction X or the second direction Y. There is a gap D1 between adjacent battery cell modules 200.

[0069] The heat exchanger 100 can be arranged on the end face of the battery cell module 200 along the third direction Z, and the heat exchanger 100 can be in contact with the surface of the battery cell module 200. The heat exchanger 100 has a cooling liquid therein, and the circulation of the cooling liquid in the heat exchanger 100 can take away the heat generated by the battery cell module 200 during operation.

[0070] In Figure 1 In the embodiment shown, the heat exchanger 100 is arranged on one surface of the battery cell module 200 along the third direction Z. In other embodiments, the number of heat exchangers 100 is two, and the two heat exchangers 100 are arranged at both ends of the battery cell module 200 along the third direction Z to increase the contact area between the battery cell module 200 and the heat exchanger 100, so that the heat exchanger 100 can take away more heat from the battery cell module 200.

[0071] Next, the specific structure of the heat exchanger 100 provided by the embodiments of the present application will be described.

[0072] Figure 2 The structural diagram of the heat exchanger provided by the embodiments of the present application is shown in Figure 3 The structural diagram of the heat exchanger provided by the embodiments of the present application is shown in Figure 2 The enlarged view of position A in FIG. 8.

[0073] Referring to Figure 2 and Figure 3 As shown in FIGS. 8 and 9, the heat exchanger 100 includes an inlet 110, an outlet 120, and a heat exchange module 130. The heat exchange module 130 includes a plurality of inlet flow channels 131, a plurality of outlet flow channels 132, and a plurality of heat exchange regions 133. The plurality of inlet flow channels 131 are in communication with the inlet 110. The plurality of outlet flow channels 132 are in communication with the outlet 120. The heat exchange region 133 is used for heat exchange with the battery cell module, and the heat exchange region 133 is arranged in correspondence with at least one inlet flow channel 131 and at least one outlet flow channel 132. The heat exchange region 133 includes a plurality of branch flow channels 1331. The inlet end 1332 of each of the plurality of branch flow channels 1331 is in communication with the inlet flow channel 131 corresponding to the heat exchange region 133. The outlet end 1333 of each of the plurality of branch flow channels 1331 is in communication with the outlet flow channel 132 corresponding to the heat exchange region 133.

[0074] The heat exchange module 130 is used to cool the battery cell module 200, and the heat exchange module 130 includes a plurality of heat exchange regions 133, which can be substantially aligned with the battery cell module 200 along the third direction Z. Each heat exchange region 133 can cover part of the battery cell module 200. In Figure 2 Four heat exchange regions 133 are schematically shown in the figure, which are a first heat exchange region 133a, a second heat exchange region 133b, a third heat exchange region 133c, and a fourth heat exchange region 133d.

[0075] The heat exchange region 133 is arranged in correspondence with at least one inflow channel 131, which means that one heat exchange region 133 can be arranged in correspondence with one inflow channel 131, and the cooling liquid in the inflow channel 131 can flow into the heat exchange region 133; or one heat exchange region 133 can also be arranged in correspondence with two or more inflow channels 131, and the cooling liquid in the two or more inflow channels 131 can flow into the heat exchange region 133. Figure 2 Four inflow channels 131 are schematically shown in the figure, which are arranged in one-to-one correspondence with the four cooling regions 133, and the four inflow channels 131 are a first inflow channel 131a, a second inflow channel 131b, a third inflow channel 131c, and a fourth inflow channel 131d. The first inflow channel 131a, the second inflow channel 131b, the third inflow channel 131c, and the fourth inflow channel 131d are all in communication with the inlet 110.

[0076] The heat exchange region 133 is arranged in correspondence with at least one outflow channel 132, which means that one heat exchange region 133 can be arranged in correspondence with one outflow channel 132, and the cooling liquid in the heat exchange region 133 can flow into the outflow channel 132; or one heat exchange region 133 can also be arranged in correspondence with two or more outflow channels 132, and the cooling liquid in the heat exchange region 133 can flow into the two or more outflow channels 132. Figure 2 Four outflow channels 132 are schematically shown in the figure, which are arranged in one-to-one correspondence with the four cooling regions 133, and the four outflow channels 132 are a first outflow channel 132a, a second outflow channel 132b, a third outflow channel 132c, and a fourth outflow channel 132d. The first outflow channel 132a, the second outflow channel 132b, the third outflow channel 132c, and the fourth outflow channel 132d are all in communication with the outlet 120.

[0077] The first inflow channel 131a, the first heat exchange region 133a, and the first outflow channel 132a are arranged in one-to-one correspondence to form a heat dissipation cycle loop, which is referred to as a first heat dissipation loop 130a.

[0078] The second inlet flow channel 131b, the second heat exchange region 133b and the second outlet flow channel 132b are arranged one by one to form a heat dissipation circulation loop, referred to as the second heat dissipation loop 130b.

[0079] The third inlet flow channel 131c, the third heat exchange region 133c and the third outlet flow channel 132c are arranged one by one to form a heat dissipation circulation loop, referred to as the third heat dissipation loop 130c.

[0080] The fourth inlet flow channel 131d, the fourth heat exchange region 133d and the fourth outlet flow channel 132d are arranged one by one to form a heat dissipation circulation loop, referred to as the fourth heat dissipation loop 130d.

[0081] The cooling liquid flowing from the inlet 110 is divided into the first heat dissipation loop 130a, the second heat dissipation loop 130b, the third heat dissipation loop 130c and the fourth heat dissipation loop 130d, and then flows out of the outlet 120 after taking away the heat of the battery cell module 200. That is, the first heat dissipation loop 130a, the second heat dissipation loop 130b, the third heat dissipation loop 130c and the fourth heat dissipation loop 130d form four parallel heat dissipation loops, and the cooling liquid flows in the four parallel heat dissipation loops at the same time, thereby reducing the flow resistance of the cooling liquid.

[0082] The first heat dissipation loop 130a, the second heat dissipation loop 130b, the third heat dissipation loop 130c and the fourth heat dissipation loop 130d are arranged in layers to form a back-shaped structure, so that the flow path length of each heat dissipation loop is close, and thus the flow resistance in each heat dissipation loop is close, so that the cooling liquid can be evenly divided in the multiple heat dissipation loops.

[0083] Please continue to see Figure 3 As shown in FIG. 1, each heat exchange region 133 includes a plurality of sub-flow channels 1331. Take the third heat exchange region 133c as an example for description. The third heat exchange region 133c includes four sub-flow channels 1331, namely a first sub-flow channel 1331a, a second sub-flow channel 1331b, a third sub-flow channel 1331c and a fourth sub-flow channel 1331d.

[0084] The end of each sub-flow channel 1331 facing the third inlet flow channel 131c is an inlet end 1332, and the inlet end 1332 of each sub-flow channel 1331 communicates with the third inlet flow channel 131c. The end of each sub-flow channel 1331 facing the third outlet flow channel 132c is an outlet end 1333, and the outlet end 1333 of each sub-flow channel 1331 communicates with the third outlet flow channel 132c.

[0085] In the third heat exchange region 133c, the cooling liquid entering from the third inlet flow channel 131c is divided into the first sub-flow channel 1331a, the second sub-flow channel 1331b, the third sub-flow channel 1331c and the fourth sub-flow channel 1331d, and then flows out of the third outlet flow channel 132c after taking away the heat of the battery module 200. That is, the first sub-flow channel 1331a, the second sub-flow channel 1331b, the third sub-flow channel 1331c and the fourth sub-flow channel 1331d also form four parallel heat dissipation circuits, and the cooling liquid flows in the four parallel heat dissipation circuits at the same time, thereby further reducing the flow resistance of the cooling liquid.

[0086] The heat exchanger 100 provided by the embodiment of the present application comprises an inlet 110, an outlet 120 and a heat exchange module 130. The heat exchange module 130 comprises a plurality of inlet flow channels 131, a plurality of outlet flow channels 132 and a plurality of heat exchange regions 133. The plurality of inlet flow channels 131 are in communication with the inlet 110. The plurality of outlet flow channels 132 are in communication with the outlet 120. The heat exchange region 133 is used for heat exchange with the battery module 200. The heat exchange region 133 is correspondingly arranged with at least one inlet flow channel 131 and at least one outlet flow channel 132. Thus, a plurality of parallel heat dissipation circuits can be formed to reduce the flow resistance of the cooling liquid. The heat exchange region 133 comprises a plurality of sub-flow channels 1331. The inlet end 1332 of the plurality of sub-flow channels 1331 is in communication with the inlet flow channel 131 corresponding to the heat exchange region 133. The outlet end 1333 of the plurality of sub-flow channels 1331 is in communication with the outlet flow channel 132 corresponding to the heat exchange region 133. Thus, a plurality of parallel heat dissipation circuits can be formed again to further reduce the flow resistance of the cooling liquid. That is, the heat exchanger 100 can reduce the flow resistance of the cooling liquid as much as possible by arranging two-stage parallel circuits.

[0087] Figure 4 Another structural schematic diagram of the heat exchanger provided by the embodiment of the present application is shown in FIG. 4. It should be noted that, Figure 4 the heat exchanger shown in FIG. 1 and Figure 2 the structure shown in FIG. 2 are the same, only the icons shown are different.

[0088] Referring to Figure 4 shown in FIG. 3, at least part of the inlet flow channel 131 comprises at least two inlet flow branches 1311, and / or at least part of the outlet flow channel 132 comprises at least two outlet flow branches 1321.

[0089] For example, the third inlet flow channel 131c comprises two inlet flow branches 1311, and the fourth inlet flow channel 131d comprises two inlet flow branches 1311. By arranging branches on the inlet flow channel 131, the flow resistance of the cooling liquid in the inlet flow channel 131 can be further reduced.

[0090] For example, the first outflow channel 132a, the second outflow channel 132b, the third outflow channel 132c and the fourth outflow channel 132d each include two outflow branches 1321. By setting outflow branches 1321 on the outflow channel 132, the resistance of the coolant flowing in the outflow channel 132 can be reduced.

[0091] Please continue reading Figure 3 As shown, at least part of the branch channel 1331 includes at least two branch branches 1334.

[0092] For example, the first branch channel 1331a, the second branch channel 1331b, the third branch channel 1331c and the fourth branch channel 1331d each include two branch channels 1334, thereby reducing the resistance to the flow of coolant in the branch channel 1331.

[0093] Figure 5 for Figure 2 Another enlarged view of point A in the middle. It should be noted that... Figure 5 The heat exchanger shown and Figure 3 The structures shown are the same, only the icons are different.

[0094] See Figure 5 As shown, multiple flow channels 1331 in each heat exchange zone 133 are arranged along the first direction X. The flow channel 1331 includes an inlet section 1335, a connecting section 1336 and an outlet section 1337 connected in sequence. The inlet section 1335 and the outlet section 1337 both extend along the second direction Y. The inlet section 1335 is connected to the inlet end 1332 and the outlet section 1337 is connected to the outlet end 1333.

[0095] Specifically, the third heat exchange zone 133c will still be used as an example for explanation. The third inlet channel 131c and the third outlet channel 132c are set at both ends of the third heat exchange zone 133c along the second direction Y. The inlet section 1335 extends along the second direction Y to facilitate the connection between the inlet section 1335 and the third inlet channel 131c through the inlet end 1332. The outlet section 1337 extends along the second direction Y to facilitate the connection between the outlet section 1337 and the third outlet channel 132c through the outlet end 1333.

[0096] Please continue reading Figure 5 As shown, in two adjacent branch channels 1331, the inlet section 1335 of one branch channel 1331 is adjacent to the outlet section 1337 of the other branch channel 1331.

[0097] For example, the outflow section 1337 of the first sub-flow passage 1331a is adjacent to the inflow section 1335 of the second sub-flow passage 1331b, so that the heat of the cooling liquid with a higher temperature in the outflow section 1337 of the first sub-flow passage 1331a can be partially transferred to the cooling liquid with a lower temperature in the inflow section 1335 of the second sub-flow passage 1331b, so as to reduce the temperature of the outflow section 1337 of the first sub-flow passage 1331a, which can be beneficial to the heat dissipation of the battery cell module 200 at the position corresponding to the outflow section 1337 of the first sub-flow passage 1331a. In addition, the temperature of the rear end of the flow path is lower, which is beneficial to the connection of the heat exchanger and the air conditioning system.

[0098] Please continue to refer to Figure 5 As shown in the figure, the connecting section 1336 is arranged in the form of a bending disc between the inflow section 1335 and the outflow section 1337.

[0099] In Figure 5 In the embodiment shown in the figure, the connecting section 1336 is arranged in the form of an S-shaped bending disc, so that one end of the connecting section 1336 is connected to the inflow section 1335 and the other end is connected to the outflow section 1337. In other embodiments, the connecting section 1336 can also be arranged in the form of other shapes of bending discs.

[0100] Please continue to refer to Figure 5 As shown in the figure, the heat exchange region 133 further comprises at least one first heat exchange flow passage 134, the first heat exchange flow passage 134 extends along the second direction Y and the first heat exchange flow passage 134 is arranged close to the at least one sub-flow passage 1331; one end of the first heat exchange flow passage 134 is in communication with the inflow flow passage 131 and the other end is in communication with the outflow flow passage 132.

[0101] Specifically, still taking the third heat exchange region 133c as an example for description. One end of the first heat exchange flow passage 134 is in communication with the third inflow flow passage 131c and the other end is in communication with the third outflow flow passage 132c. Figure 5 In the embodiment shown in the figure, the first heat exchange flow passage 134 can be arranged close to the fourth sub-flow passage 1331d, and in other embodiments, the first heat exchange flow passage 134 can also be arranged close to the first sub-flow passage 1331a, the second sub-flow passage 1331b or the third sub-flow passage 1331c, for example, the first heat exchange flow passage 134 can also be arranged close to the first sub-flow passage 1331a.

[0102] The temperature of the cooling liquid in the first heat exchange flow passage 134 is lower, and the heat in the sub-flow passage 1331 can be transferred to the first heat exchange flow passage 134, so that the first heat exchange flow passage 134 can neutralize the heat of the sub-flow passage 1331 in the heat exchange region 133, further reduce the temperature of the rear end of the flow path, and also make the temperatures of the various heat exchange regions 133 in the heat exchange module 130 more close, so that the temperature distribution of the heat exchange module 130 is more uniform, so that the temperature of the battery pack 10 at different battery cell modules 200 is more uniform.

[0103] Please continue to see Figure 1 As shown, the first heat exchange flow channel 134 includes at least two first heat exchange branches 1341. The resistance of the cooling liquid flowing in the first heat exchange flow channel 134 can be reduced.

[0104] Please continue to see Figure 4 And Figure 4 As shown, the first heat exchange flow channel 134 is arranged to be staggered with the projection of the battery cell module 200 on the battery cell module 200.

[0105] The projection of the first heat exchange flow channel 134 on the battery cell module 200 is located in the gap D1 between adjacent battery cell modules 200, that is, the first heat exchange flow channel 134 does not contact the battery cell module 200, which can reduce the heat generated by the battery cell module 200 absorbed by the first heat exchange flow channel 134, so that the temperature of the cooling liquid in the first heat exchange flow channel 134 is lower.

[0106] Please continue to see Figure 1 As shown, the heat exchanger 100 further includes a second heat exchange flow channel 141, the second heat exchange flow channel 141 is sleeved outside the heat exchange module 130, one end of the second heat exchange flow channel 141 is connected with the inlet 110, and the other end of the second heat exchange flow channel 141 is connected with the outlet 120.

[0107] The temperature of the cooling liquid in the second heat exchange flow channel 141 is lower, and the second heat exchange flow channel 141 is sleeved outside each heat exchange region 133, thereby, the heat of each heat exchange region 133 can be absorbed, and the temperature of each heat exchange region 133 can be reduced, so that the temperature distribution of each heat exchange region 133 in the heat exchange module 130 is more uniform. In addition, the second heat exchange flow channel 141 and the heat dissipation circuit also form a multi-layered H-shaped structure, so that the flow path length of the cooling liquid in the second heat exchange flow channel 141 is close to the flow path length of the cooling liquid in the heat dissipation circuit, thereby, the flow resistance in the second heat exchange flow channel 141 is also close to the flow resistance in the heat dissipation circuit, so that the cooling liquid can be evenly distributed in the second heat exchange flow channel 141 and the plurality of heat dissipation circuits. For example, the flow rate ratio of the first heat dissipation circuit 130a, the second heat dissipation circuit 130b, the third heat dissipation circuit 130c, the fourth heat dissipation circuit 130d and the second heat exchange flow channel 141 is: 19%, 19%, 20%, 22%, 20%.

[0108] Please continue to see Figure 1 As shown, the second heat exchange flow channel 141 is arranged to be staggered with the projection of the battery cell module 200 on the battery cell module 200.

[0109] In Figure 4In the shown embodiment, the projection of the second heat exchange flow channel 141 on the battery cell module 200 is located outside the battery cell module 200, that is, the second heat exchange flow channel 141 does not contact the battery cell module 200, so that the heat generated by the battery cell module 200 absorbed by the second heat exchange flow channel 141 is reduced, and the temperature of the cooling liquid in the second heat exchange flow channel 141 is relatively low.

[0110] Please continue to see Figure 6 As shown, the second heat exchange flow channel 141 includes at least two second heat exchange branches 1411. The resistance of the cooling liquid flowing in the second heat exchange flow channel 141 can be reduced.

[0111] Figure 2 For Figure 6 The enlarged view at B. Please see Figure 1 As shown, the heat exchanger 100 further includes a first adapter pipe 150, one end of the first adapter pipe 150 is connected with the inlet 110, and the other end is provided with a medium inlet 170, and / or; further includes a second adapter pipe 160, one end of the second adapter pipe 160 is connected with the outlet 120, and the other end is provided with a medium outlet 180.

[0112] The first adapter pipe 150 is used to connect the inlet 110 and the medium inlet 170, and the second adapter pipe 160 is used to connect the outlet 120 and the medium outlet 180. The flow loop of the cooling liquid is the medium inlet 170, the first adapter pipe 150, the inlet 110, the inlet flow channel 131, the heat exchange region 133, the outlet flow channel 132, the outlet 120, the second adapter pipe 160 and the medium outlet 180.

[0113] The first adapter pipe 150 is inclined relative to the plane formed by the first direction X and the second direction Y and extends in a direction away from the heat exchange module 130, and / or, the second adapter pipe 160 is inclined relative to the plane formed by the first direction X and the second direction Y and extends in a direction away from the heat exchange module 130.

[0114] The first adapter pipe 150 is not at a right angle with the inlet flow channel 131 and the medium inlet 170, compared with the adapter pipe being connected at a right angle with the inlet and the inlet flow channel in the related art, the resistance of the cooling liquid flowing at the connection between the first adapter pipe 150 and the medium inlet 170 and the connection between the first adapter pipe 150 and the inlet 110 is smaller.

[0115] The second adapter pipe 160 is not at a right angle with the inlet flow channel 131 and the medium outlet 180, compared with the adapter pipe being connected at a right angle with the inlet and the inlet flow channel in the related art, the resistance of the cooling liquid flowing at the connection between the second adapter pipe 160 and the medium outlet 180 and the connection between the second adapter pipe 160 and the outlet 120 is smaller. Thus, the resistance of the cooling liquid flowing in the entire circulation loop can be further reduced.

[0116] Please continue to see​ As shown, the projection of the first adapter pipe 150 and / or the second adapter pipe 160 on the battery cell module 200 is staggered with the battery cell module 200.

[0117] The temperature of the cooling liquid in the first adapter pipe 150 is lower in the entire circulation loop, and the temperature of the cooling liquid in the second adapter pipe 160 is higher in the entire circulation loop, the projection of the first adapter pipe 150 and / or the second adapter pipe 160 on the battery cell module 200 is located outside the battery cell module 200, that is, the first adapter pipe 150 and / or the second adapter pipe 160 is not in contact with the battery cell module 200, and the supercooled cooling liquid in the first adapter pipe 150 and / or the superheated cooling liquid in the second adapter pipe 160 does not affect the heat dissipation of the battery cell module 200.

[0118] The application further provides a battery pack, which includes the heat exchanger 100 provided by the above-mentioned embodiments. The structure of the battery pack 10 and the heat exchanger 100 has been described in detail in the above-mentioned embodiments, and will not be repeated here. The heat exchanger 100 is used for dissipating heat for the battery cell module 200 in the battery pack 10, and the heat exchanger 100 can also be used for dissipating heat for other devices (such as adapter copper bars or battery managers) in the battery pack 10, or the heat exchanger 100 can also be used for dissipating heat for other components in the electrical equipment. The battery pack 10 is used for supplying power to the electrical equipment, and the electrical equipment can include one battery pack 10 or multiple battery packs 10.

[0119] The electrical equipment can be a vehicle, an aircraft, a ferry, a computer, or an energy storage cabinet, etc. which is powered by a battery pack. The vehicle can be an electric vehicle (EV), a pure electric vehicle (PEV / BEV), a hybrid electric vehicle (HEV), a range extended electric vehicle (REEV), a plug-in hybrid electric vehicle (PHEV), or a new energy vehicle.

[0120] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A heat exchanger, characterized by, The heat exchange module (130) comprises: a plurality of inlet flow channels (131) in communication with the inlet (110); a plurality of outlet flow channels (132) in communication with the outlet (120); a plurality of heat exchange regions (133) for heat exchange with the battery cell module, the heat exchange regions (133) being provided in correspondence with at least one of the inlet flow channels (131) and at least one of the outlet flow channels (132); the heat exchange regions (133) comprise a plurality of sub-flow channels (1331), the inlet ends (1332) of the sub-flow channels (1331) being in communication with the inlet flow channels (131) corresponding to the heat exchange regions (133), and the outlet ends (1333) of the sub-flow channels (1331) being in communication with the outlet flow channels (132) corresponding to the heat exchange regions (133).

2. The heat exchanger of claim 1, wherein At least part of the inlet flow channels (131) comprises at least two inlet flow branches (1311), and / or at least part of the outlet flow channels (132) comprises at least two outlet flow branches (1321).

3. The heat exchanger of claim 1, wherein At least part of the sub-flow channels (1331) comprises at least two sub-flow branches (1334).

4. The heat exchanger of claim 1, wherein The plurality of sub-flow channels (1331) in each of the heat exchange regions (133) are arranged along a first direction, and the sub-flow channels (1331) comprise an inlet flow section (1335), a connecting section (1336) and an outlet flow section (1337) connected in sequence, the inlet flow section (1335) and the outlet flow section (1337) extending along a second direction, the inlet flow section (1335) being connected to the inlet end (1332), and the outlet flow section (1337) being connected to the outlet end (1333).

5. The heat exchanger of claim 4, wherein In adjacent two of the sub-flow channels (1331), the inlet flow section (1335) of one of the sub-flow channels (1331) is adjacent to the outlet flow section (1337) of the other sub-flow channel (1331).

6. The heat exchanger of claim 5, wherein The connecting section (1336) is bent between the inlet flow section (1335) and the outlet flow section (1337).

7. The heat exchanger of claim 1, wherein The heat exchange region (133) further comprises at least one first heat exchange flow channel (134) extending along the second direction and being provided close to at least one of the sub-flow channels (1331); one end of the first heat exchange flow channel (134) is in communication with the inlet flow channel (131), and the other end is in communication with the outlet flow channel (132).

8. The heat exchanger of claim 7, wherein The first heat exchange flow channel (134) comprises at least two first heat exchange branches (1341).

9. The heat exchanger of claim 7, wherein The projection of the first heat exchange flow channel (134) on the battery cell module (200) is offset from the battery cell module (200).

10. The heat exchanger of claim 1, wherein The plurality of inlet flow channels (131), the plurality of heat exchange regions (133) and the plurality of outlet flow channels (132) form a plurality of heat dissipation loops, and the plurality of heat dissipation loops are arranged in layers.

11. The heat exchanger according to any one of claims 1 to 10, characterized in that The second heat exchange flow channel (141) is arranged outside the heat exchange module (130), one end of the second heat exchange flow channel (141) is connected with the inlet (110), and the other end of the second heat exchange flow channel (141) is connected with the outlet (120).

12. The heat exchanger of claim 11, wherein, The projection of the second heat exchange flow channel (141) on the electric core module (200) is staggered with the electric core module (200).

13. The heat exchanger of claim 11, wherein The second heat exchange flow channel (141) includes at least two second heat exchange branches (1411).

14. The heat exchanger according to any one of claims 1 to 10, characterized in that The first adapter pipe (150) is connected with the inlet (110) at one end, and is provided with a medium inlet (170) at the other end; And / or, the second adapter pipe (160) is connected with the outlet (120) at one end, and is provided with a medium outlet (180) at the other end.

15. The heat exchanger of claim 14, wherein, The first adapter pipe (150) is inclined relative to the plane formed by the first direction and the second direction and extends away from the heat exchange module (130), and / or, The second adapter pipe (160) is inclined relative to the plane formed by the first direction and the second direction and extends away from the heat exchange module (130).

16. The heat exchanger of claim 14, wherein The projection of the first adapter pipe (150) and / or the second adapter pipe (160) on the electric core module (200) is staggered with the electric core module (200).

17. A battery pack, characterized by The battery pack (10) of claim 17 or 18 or the heat exchanger (100) of any one of claims 1 to 16 is included.

18. The battery pack of claim 17, wherein, The number of the heat exchanger (100) is two, and the two heat exchangers (100) are arranged at the two ends of the electric core module (200) along the third direction.

19. An electrical device, characterized by The battery pack (10) of claim 17 or 18 or the heat exchanger (100) of any one of claims 1 to 16 is included.

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