Battery pack and electric equipment

Abstract

The embodiment of the utility model provides a battery pack and electric equipment, and relates to the technical field of energy storage. The battery pack comprises a heat exchange piece and a battery, the heat exchange piece comprises a heat exchange flow channel and a confluence flow channel, and the confluence flow channel is arranged on one side of the heat exchange flow channel and communicates with the heat exchange flow channel; the battery is connected with the heat exchange piece, and the orthographic projection of the battery on the heat exchange piece coincides with the heat exchange flow channel and exchanges heat with the heat exchange flow channel. According to the embodiment of the invention, the heat balance of each area of the battery can be ensured, and the safety of the battery pack is improved.

Description

Technical Field

[0001] Embodiments of the present application relate to the technical field of energy storage, and in particular, to a battery pack and an electrical device. Background Art

[0002] A battery pack is a device that converts chemical energy into electrical energy and is widely used in fields such as new energy vehicles and energy storage power stations. A battery pack usually includes a support member and a plurality of batteries disposed on the support member. A large amount of heat is generated when the plurality of batteries are working, and heat exchangers are usually used to dissipate heat from the batteries.

[0003] In related technologies, it is usually necessary to dispose the heat exchanger on a side of the support member facing away from the plurality of batteries. However, the layout of the flow channels in the heat exchanger is unreasonable, resulting in difficulty in balancing the heat in each area of the battery, thereby reducing the safety of the battery pack. Summary of the Utility Model

[0004] In view of the above problems, embodiments of the present application provide a battery pack and an electrical device, which can ensure the heat balance of each area of the battery and improve the safety of the battery pack.

[0005] To achieve the above object, embodiments of the present application provide the following technical solutions:

[0006] A first aspect of embodiments of the present application provides a battery pack, which includes:

[0007] A heat exchanger, the heat exchanger includes a heat exchange flow channel and a confluence flow channel, the confluence flow channel is disposed on one side of the heat exchange flow channel and is in communication with the heat exchange flow channel;

[0008] A battery, the battery is disposed opposite to the heat exchanger, and a positive projection of the battery on the heat exchanger is located in the heat exchange flow channel and exchanges heat with the heat exchange flow channel.

[0009] In a possible implementation manner, the confluence flow channel and the heat exchange flow channel are disposed on the same layer.

[0010] In a possible implementation manner, the confluence flow channel includes a first confluence flow channel and a second confluence flow channel, the first confluence flow channel, the second confluence flow channel and the heat exchange flow channel are disposed on the same layer;

[0011] At least one of the first confluence flow channel and the second confluence flow channel is in communication with the heat exchange flow channel through a communication flow channel.

[0012] In a possible implementation manner, the confluence flow channel includes a first confluence flow channel and a second confluence flow channel, and at least one of the first confluence flow channel and the second confluence flow channel is disposed on a different layer from the heat exchange flow channel;

[0013] Among them, the confluence channel arranged in a different layer from the heat exchange channel is connected through a connecting channel.

[0014] In a possible implementation manner, the first confluence channel is arranged in a different layer from the heat exchange channel, and the second confluence channel is arranged in the same layer as the heat exchange channel;

[0015] The first confluence channel is connected to the heat exchange channel through the connecting channel.

[0016] In a possible implementation manner, along the stacking direction of the first confluence channel and the heat exchange channel, the orthographic projection of the first confluence channel on the plane where the second confluence channel is located at least partially coincides with the second confluence channel.

[0017] In a possible implementation manner, along the stacking direction of the confluence channel and the heat exchange channel, the connecting channel is arranged between the confluence channel and the heat exchange channel.

[0018] In a possible implementation manner, the heat exchange channel includes a plurality of sub-heat exchange channels, and the plurality of sub-heat exchange channels are independent of each other;

[0019] The battery includes a plurality of heat generating regions with different heat generation amounts;

[0020] Each of the sub-heat exchange channels respectively exchanges heat with each of the heat generating regions.

[0021] In a possible implementation manner, the sub-heat exchange channel includes a first sub-heat exchange channel and a second sub-heat exchange channel arranged in the same layer, and the first sub-heat exchange channel is arranged on at least one side of the second sub-heat exchange channel;

[0022] The confluence channel includes a first confluence channel and a second confluence channel arranged in different layers; the first confluence channel is connected to the first sub-heat exchange channel through a connecting channel, and the second confluence channel is connected to the second sub-heat exchange channel.

[0023] In a possible implementation manner, the heat generating region includes a first heat generating region and a second heat generating region, and the first heat generating region is arranged on at least one side of the second heat generating region;

[0024] The first sub-heat exchange channel is used to exchange heat with the first heat generating region, and the second sub-heat exchange channel is used to exchange heat with the second heat generating region.

[0025] In a possible implementation manner, the number of the first sub-heat exchange channels is two, and the two first sub-heat exchange channels are respectively arranged on both sides of the second sub-heat exchange channel;

[0026] The number of the first heat generating regions is two, and the two first heat generating regions are respectively arranged on both sides of the second heat generating region.

[0027] In a possible implementation, there are multiple heat exchange channels; the multiple heat exchange channels are arranged in sequence along the first direction and are independent of each other;

[0028] The first converging flow channel is connected with the first sub-heat exchange flow channels of each of the heat exchange flow channels through the connecting flow channel;

[0029] The second converging channel is communicated with the second sub-heat exchange channels of each of the heat exchange channels.

[0030] In a possible implementation, there are multiple heat exchange channels; the multiple heat exchange channels are arranged in sequence along the first direction and are independent of each other; the first converging channel is connected to the first sub-heat exchange channel of each heat exchange channel through the connecting channel; the second converging channel is connected to the second sub-heat exchange channel of each heat exchange channel.

[0031] In a possible implementation, the first confluence channel includes a first sub-confluence channel and a second sub-confluence channel, and the first sub-confluence channel and the second sub-confluence channel are respectively located on two sides of the heat exchange channel;

[0032] The communication flow channel includes a first communication flow channel and a second communication flow channel;

[0033] The first sub-flow confluence channel is connected to the first end of the first sub-heat exchange channel through the first connecting channel;

[0034] The second sub-flow confluence channel is communicated with the second end of the first sub-heat exchange channel through the second communication channel.

[0035] In a possible implementation, the second confluence channel includes a third sub-confluence channel and a fourth sub-confluence channel, and the third sub-confluence channel and the fourth sub-confluence channel are respectively located on both sides of the heat exchange channel and are respectively connected to the first end and the second end of the second sub-heat exchange channel.

[0036] In a possible implementation, the heat exchange element includes a flow channel plate and a temperature balancing plate that are stacked, and the heat exchange flow channel and at least a portion of the converging flow channel are arranged between the flow channel plate and the temperature balancing plate.

[0037] In a possible implementation, the converging flow channel includes a first converging flow channel and a second converging flow channel arranged in different layers; the second converging flow channel and the heat exchange flow channel are arranged between the flow channel plate and the temperature uniform plate.

[0038] In a possible implementation, the heat exchange element includes an auxiliary plate, and the auxiliary plate is stacked and arranged on a side of the temperature balancing plate away from the flow channel plate;

[0039] The first confluence flow channel is located between the auxiliary plate and the heat spreader.

[0040] In a possible implementation, a communication hole is formed in the heat spreader, and the communication hole correspondingly communicates the first confluence flow channel and the first sub-heat exchange flow channel, and the communication hole forms the communication flow channel.

[0041] In a possible implementation, the auxiliary plate includes a first auxiliary plate and a second auxiliary plate, and the first auxiliary plate extends along a second direction;

[0042] The second auxiliary plate is connected to the first auxiliary plate and extends along a first direction;

[0043] The first direction intersects the second direction.

[0044] In a possible implementation, the heat exchange member further includes a bridging member, and the bridging member is disposed on a side of the heat spreader facing away from the flow channel plate and encloses the communication flow channel with the heat spreader;

[0045] The heat spreader includes a first communication hole and a second communication hole which are spaced apart;

[0046] One end of the communication flow channel communicates with the first confluence flow channel through the first communication hole, and the other end of the communication flow channel communicates with the first sub-heat exchange flow channel through the second communication hole.

[0047] In a possible implementation, the battery pack further includes a support member, and the support member includes a first region and a second region, and the second region is disposed on at least one side of the first region;

[0048] The heat exchange member is disposed on the support member, and the heat exchange flow channel is disposed on the first region, and the confluence flow channel is disposed on the second region.

[0049] In a possible implementation, the heat exchange member is connected to the first region, and the heat exchange member and the first region have a connection point;

[0050] The positive projection of the confluence flow channel extending along the first direction on the plane where the support member is located is located on a side of the connection point away from the first region.

[0051] In a possible implementation, there is a preset distance between the positive projection of the confluence flow channel extending along the first direction on the plane where the support member is located and the connection point.

[0052] In a possible implementation, the support member includes a side beam, and the side beam extends along the second direction; the positive projection of the confluence flow channel on the support member covers at least a part of the side beam.

[0053] In a possible implementation, the side beam is provided with an avoidance area; the avoidance area is used to avoid the auxiliary plate or the bridging member.

[0054] The second aspect of the embodiments of the present application provides an electrical device, including an electrical device and the battery pack described in the first aspect. The battery pack is electrically connected to the electrical device and is used to provide electrical energy for the electrical device.

[0055] In the battery pack and the electrical device provided by the embodiments of the present application, the heat exchange member includes a heat exchange flow channel and a confluence flow channel, and the confluence flow channel is communicated with the heat exchange flow channel. Among them, the orthographic projection of the battery on the heat exchange member is located in the heat exchange flow channel. With such a setting, it can be ensured that the flow channels corresponding to the battery are all heat exchange flow channels after being branched from the confluence flow channel, thereby reducing the influence of the confluence flow channel on the temperature difference of each area of the battery, improving the heat balance of each area of the battery, and improving the safety of the battery pack.

[0056] In addition to the technical problems solved by the embodiments of the present application, the technical features constituting the technical solutions, and the beneficial effects brought by the technical features of these technical solutions described above, other technical problems that can be solved by the battery pack and the electrical device provided by the embodiments of the present application, other technical features included in the technical solutions, and the beneficial effects brought by these technical features will be further described in detail in the specific implementation manners. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0058] Figure 1 Partial structural schematic diagram of the battery pack provided by the embodiments of the present application Figure 1 ;

[0059] Figure 2 Partial structural schematic diagram of the battery pack provided by the embodiments of the present application Figure 2 ;

[0060] Figure 3 Partial structural schematic diagram of the battery pack provided by the embodiments of the present application Figure 3 ;

[0061] Figure 4 Schematic diagram of the heat exchange member provided by the embodiments of the present application Figure 1 ;

[0062] Figure 5 ForFigure 4 Enlarged schematic view of area A in

[0063] Figure 6 is Figure 4 Enlarged schematic view of area B in

[0064] Figure 7 Schematic of the heat exchange component provided by an embodiment of the present application Figure 2 ;

[0065] Figure 8 Exploded schematic view of the heat exchange component provided by an embodiment of the present application;

[0066] Figure 9 is Figure 7 Enlarged schematic view of area C in

[0067] Figure 10 Partial schematic view of the heat exchange component provided by an embodiment of the present application;

[0068] Figure 11 is Figure 10 Enlarged schematic view of area D in

[0069] Figure 12 Schematic of the heat exchange component provided by an embodiment of the present application Figure 3 ;

[0070] Figure 13 is Figure 12 Enlarged schematic view of area E in

[0071] Figure 14 Schematic of the connecting flow channel provided by an embodiment of the present application.

[0072] Explanation of reference numerals:

[0073] 100: Support member; 110: First area; 120: Second area; 140: Connection point;

[0074] 200: Battery;

[0075] 300: Heat exchange component; 310: Heat exchange flow channel; 311: First sub - heat exchange flow channel; 312: Second sub - heat exchange flow channel; 320: Confluence flow channel; 321: First confluence flow channel; 3211: First sub - confluence flow channel; 3212: Second sub - confluence flow channel; 322: Second confluence flow channel; 3221: Third sub - confluence flow channel; 3222: Fourth sub - confluence flow channel; 330: Connecting flow channel; 340: Flow channel plate; 350: Isothermal plate; 351: Connecting hole; 360: Auxiliary plate; 361: First auxiliary plate; 362: Second auxiliary plate; 370: Bridging member. Detailed implementation manner

[0076] As described in the background art, the flow channel layout of the heat exchange member in the related art is unreasonable, resulting in difficulty in balancing the heat of each area of the battery. After research by the inventor, it is found that the reason for this problem is that the flow channels of the heat exchange member usually include a confluence flow channel and a heat exchange flow channel, and the heat exchange flow channel is interconnected with the confluence flow channel; among them, the orthographic projection of the battery on the heat exchange member coincides with the confluence flow channel and the heat exchange flow channel, that is to say, the battery covers the confluence flow channel and the heat exchange flow channel. In view of the fact that the temperature of the fluid in the confluence flow channel is higher or lower than the temperature of the fluid in the heat exchange flow channel, it is difficult to balance the heat of each area of the battery, thereby reducing the safety of the battery pack.

[0077] In view of the above technical problems, the embodiment of the present application provides a battery pack and an electrical device. The heat exchange member includes a heat exchange flow channel and a confluence flow channel, and the confluence flow channel is communicated with the heat exchange flow channel. Among them, the orthographic projection of the battery on the heat exchange member coincides with the heat exchange flow channel. With such a setting, the flow channels corresponding to the battery can be heat exchange flow channels that have completed flow division, reducing the influence of the confluence flow channel on the temperature difference of each area of the battery, improving the heat balance of each area of the battery, and improving the safety of the battery pack.

[0078] In order to make the above objects, features, and advantages of the embodiments of the present application more obvious and understandable, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0079] Please refer to the attached Figure 1 The embodiment of the present application provides a battery pack for supplying power to an electrical device. The battery pack includes a heat exchange member 300 and a battery 200. The heat exchange member 300 exchanges heat with the battery 200 to adjust the temperature of the battery 200. It should be noted that in this embodiment, heat exchange can be understood as that the heat exchange member 300 can cool down the battery 200 or heat the battery 200. Specifically, the type of fluid flowing in the heat exchange member 300 can be freely selected according to the environment where the battery 200 is located. For example, when the heat exchange member 300 is used to cool down the battery 200, the fluid may include refrigerant, CO2, ethylene glycol, or water.

[0080] Please refer to the attached Figure 2 to the attached Figure 6 As shown in the attached drawings, the heat exchange member 300 includes a heat exchange flow channel 310 and a confluence flow channel 320. The confluence flow channel 320 is arranged on one side of the heat exchange flow channel 310 and is communicated with the heat exchange flow channel 310. In this way, the fluid can flow in the confluence flow channel 320 and the heat exchange flow channel 310 and exchange heat with the battery 200.

[0081] The battery 200 is disposed opposite to the heat exchange member 300, and the orthographic projection of the battery 200 on the heat exchange member 300 is located within the heat exchange flow channel 310 and exchanges heat with the heat exchange flow channel 310. In other words, the orthographic projection of the battery 200 on the heat exchange member 300 is located within the heat exchange flow channel, covers at least a part of the heat exchange flow channel 310, and is arranged offset from the confluence flow channel 320. Such an arrangement can make the flow channels corresponding to the battery 200 all be heat exchange flow channels after the flow is divided from the confluence flow channel, thereby reducing the influence of the confluence flow channel 320 on the temperature difference of each region of the battery, improving the heat balance of each region of the battery, and improving the safety of the battery pack.

[0082] It can be understood that the orthographic projection of the battery 200 on the heat exchange member 300 being located within the heat exchange flow channel 310 can mean that the area of the orthographic projection of the battery 200 on the heat exchange flow channel 310 is less than or equal to the area of the heat exchange flow channel 310. Among them, the area of the heat exchange flow channel 310 is the sum of the areas of all the heat exchange flow channels and the non-flow channel areas between any two adjacent heat exchange flow channels, that is, the area of the shape formed by the entire connection of the outermost two heat exchange flow channels, that is, the remaining area of the heat exchange member 300 after subtracting the area where the confluence flow channel is located.

[0083] Furthermore, in other possible implementation manners, the orthographic projection of the battery 200 on the heat exchange member 300 coincides with the heat exchange flow channel 310, thereby increasing the area of the heat exchange member and increasing the volume energy density of the battery pack.

[0084] In one possible implementation manner, the confluence flow channel 320 and the heat exchange flow channel 310 are arranged on the same layer. In other words, part of the confluence flow channel 320 and the heat exchange flow channel 310 are arranged on the same layer; or all of the confluence flow channel 320 and the heat exchange flow channel 310 are arranged on the same layer. In this way, not only can the structure of the heat exchange member 300 be made more compact and the manufacturing process be simplified, but also the fluid resistance is reduced and the heat exchange effect of the heat exchange member 300 is enhanced.

[0085] In addition, when part of the confluence flow channel 320 and the heat exchange flow channel 310 are arranged on the same layer and the remaining part of the confluence flow channel 320 and the heat exchange flow channel 310 are arranged on different layers, the occupied area of the confluence flow channel 320 on the heat exchange member 300 can also be reduced, which is more conducive to increasing the occupied area of the heat exchange flow channel 310, and then facilitating the separation of the heat exchange flow channel 310 into multiple sub-heat exchange flow channels, fully ensuring that the heat exchange member 300 can perform zoning control on the battery 200 and improving the temperature balance of the battery 200.

[0086] It should be noted that the number of the confluence flow channels 320 can be selected according to the layout of the heat exchange flow channels 310. For example, it can be selected according to the length of the heat exchange flow channel 310 and the zoning of the heat exchange flow channel 310.

[0087] Exemplarily, the converging flow channel 320 includes a first converging flow channel 321 and a second converging flow channel 322. Among them, the first converging flow channel 321 and the second converging flow channel 322 may all be arranged on the same layer as the heat exchange flow channel 310, or one of them may be arranged on the same layer as the heat exchange flow channel 310, and the other may be arranged on a different layer from the heat exchange flow channel 310.

[0088] In one example, please refer to the attached Figures 4 to 6 , the first converging flow channel 321, the second converging flow channel 322 and the heat exchange flow channel 310 are arranged on the same layer. That is, the above-mentioned flow channels can be formed on the plate by a stamping process. For example, in this embodiment, the first converging flow channel 321, the second converging flow channel 322 and the heat exchange flow channel 310 are formed on the plate by a stamping process at the same time, which can simplify the manufacturing process, improve production efficiency and reduce manufacturing costs.

[0089] Among them, at least one of the first converging flow channel 321 and the second converging flow channel 322 is connected to the heat exchange flow channel 310 through a connecting flow channel 330. That is to say, one or all of the first converging flow channel 321 and the second converging flow channel 322 are connected to the heat exchange flow channel 310 through the connecting flow channel 330. Such a setting can increase the flexibility of the setting positions of the first converging flow channel 321 and the second converging flow channel 322.

[0090] In the following embodiments, taking the converging flow channel 320 being arranged on one side of the heat exchange flow channel 310 in the second direction as an example, the connection modes of the first converging flow channel 321 and the second converging flow channel 322 with the heat exchange flow channel 310 will be described.

[0091] Please refer to the attached Figure 2 to the attached Figure 4 , for example, among the first converging flow channel 321 and the second converging flow channel 322 that are on the same side of the heat exchange flow channel 310 in the second direction, the first converging flow channel 321 is located on the side of the second converging flow channel 322 that is away from the heat exchange flow channel 310. That is, the first converging flow channel 321 is located outside the second converging flow channel 322.

[0092] The first converging flow channel 321 can be connected to the heat exchange flow channel 310 through the connecting flow channel 330, and the second converging flow channel 322 can also be connected to the heat exchange flow channel 310 through the connecting flow channel 330, or directly connected to the heat exchange flow channel 310. Such a setting can enable the first converging flow channel 321 to be connected to the heat exchange flow channel 310 without changing the setting position of the second converging flow channel 322, ensure that the fluid can flow into the heat exchange flow channel 310, and further enable the heat exchange flow channel 310 to have a heat exchange capacity. In addition, the first converging flow channel 321 is connected to the heat exchange flow channel 310 through the connecting flow channel 330, which also makes the structure of the heat exchange member 300 more compact, helps to save space, and is suitable for application scenarios that require efficient heat exchange but have limited space.

[0093] In another example, the confluence flow channel 320 includes a first confluence flow channel 321 and a second confluence flow channel 322, and at least one of the first confluence flow channel 321 and the second confluence flow channel 322 is arranged on a different layer from the heat exchange flow channel 310; wherein, the confluence flow channel arranged on a different layer from the heat exchange flow channel 310 is connected through a connecting flow channel 330.

[0094] In other words, both the first confluence flow channel 321 and the second confluence flow channel 322 are arranged on a different layer from the heat exchange flow channel 310; or, one of the first confluence flow channel 321 and the second confluence flow channel 322 is arranged on a different layer from the heat exchange flow channel 310.

[0095] Exemplarily, please refer to Appendix Figure 7 to Appendix Figure 11 , the first confluence flow channel 321 is arranged on a different layer from the heat exchange flow channel 310, and the second confluence flow channel 322 is arranged on the same layer as the heat exchange flow channel 310; the first confluence flow channel 321 is connected to the heat exchange flow channel 310 through a connecting flow channel 330, and the second confluence flow channel 322 can be directly connected to the heat exchange flow channel 310. With such an arrangement, the number of connecting flow channels 330 can be reduced, and thus the manufacturing process of the heat exchange member 300 can be reduced.

[0096] It should be noted that the first confluence flow channel 321 and the second confluence flow channel 322 can be arranged in alignment or misalignment in the direction perpendicular to the heat exchange flow channel 310.

[0097] In a possible implementation manner, along the stacking direction of the first confluence flow channel 321 and the heat exchange flow channel 310, that is, along the direction perpendicular to the heat exchange member 300, the orthographic projection of the first confluence flow channel 321 on the plane where the second confluence flow channel 322 is located at least partially coincides with the second confluence flow channel 322. That is to say, the orthographic projection of the first confluence flow channel 321 on the plane where the heat exchange flow channel 310 is located at least partially coincides with the second confluence flow channel 322. It should be understood that in this example, at least partial coincidence can be understood as partial coincidence or complete coincidence.

[0098] With such an arrangement, it is possible to prevent the first confluence flow channel 321 and the second confluence flow channel 322 from being laid flat in the horizontal direction, reduce the occupied area of the confluence flow channel 320, and thus maximize the occupied area of the heat exchange flow channel 310 as much as possible.

[0099] In another possible implementation manner, please refer to Appendix Figure 12 and Appendix Figure 13 , along the stacking direction of the first confluence flow channel 321 and the heat exchange flow channel 310, that is, along the direction perpendicular to the heat exchange member 300, the orthographic projection of the first confluence flow channel 321 on the plane where the second confluence flow channel 322 is located is misaligned with the second confluence flow channel 322.

[0100] The first confluence flow channel 321 is located on one side of the heat exchange flow channel 310 in the second direction, and the second confluence flow channel 322 is located in the middle of the heat exchange flow channel 310. In this way, the distance between the first confluence flow channel 321 and the second confluence flow channel 322 can be increased, thereby avoiding interference between the first confluence flow channel 321 and the second confluence flow channel 322.

[0101] In a possible implementation, please refer to the attached Figure 9 , along the stacking direction of the confluence flow channel 320 and the heat exchange flow channel 310, the communication flow channel 330 is arranged between the confluence flow channel 320 and the heat exchange flow channel 310. With this arrangement, it can ensure the effective conduction and distribution of the fluid between different layers, enhance the heat conduction efficiency, and improve the heat exchange performance of the heat exchange member 300. In addition, by arranging the communication flow channel 330 between the confluence flow channel 320 and the heat exchange flow channel 310, the flow channel layout can be arranged more compactly, saving space and making the heat exchange member 300 more compact and efficient.

[0102] It should be understood that the number of the heat exchange flow channels 310 can be one, or there can be other settings. For example, the heat exchange flow channel 310 includes a plurality of sub-heat exchange flow channels, and the plurality of sub-heat exchange flow channels are independent of each other. The battery 200 includes a plurality of heat generation areas with different heat generation amounts, and each sub-heat exchange flow channel exchanges heat with each corresponding heat generation area respectively.

[0103] In this way, the plurality of sub-heat exchange flow channels are independent of each other. The flow rate of each sub-heat exchange flow channel can be designed and adjusted according to the specific heat demand of its corresponding heat generation area, so as to ensure that the temperature of each heat generation area can be effectively controlled. For example, for a heat generation area with a larger heat generation amount, a more efficient sub-heat exchange flow channel can be designed, and for a heat generation area with a smaller heat generation amount, a relatively simple sub-heat exchange flow channel can be designed, thereby optimizing the performance of the heat exchange member 300 and ensuring the temperature balance of each heat generation area of the battery 200.

[0104] In addition, in this embodiment, the heat exchange flow channel 310 can also be divided into a plurality of independent sub-heat exchange flow channels according to the difference in the heat generation amounts of different regions of the battery 200, and the sub-heat exchange flow channels are used to exchange heat with the corresponding heat generation areas, which is beneficial to managing the temperature difference of the battery and solving the problem of uneven battery heating.

[0105] It should be noted that the number of the plurality of sub-heat exchange flow channels can be two, three or even more. Exemplarily, the plurality of sub-heat exchange flow channels include a first sub-heat exchange flow channel 311 and a second sub-heat exchange flow channel 312 arranged on the same layer, and the first sub-heat exchange flow channel 311 is arranged on at least one side of the second sub-heat exchange flow channel 312. For example, the number of the first sub-heat exchange flow channels 311 is one, and the first sub-heat exchange flow channel 311 is located on one side of the second sub-heat exchange flow channel 312; in the attached Figure 2Taking the shown orientation as an example, the first sub-heat exchange channel 311 is located on the left or right side of the second sub-heat exchange channel 312. For another example, the number of the first sub-heat exchange channels 311 can also be two, and the two first sub-heat exchange channels 311 are respectively located on both sides of the second sub-heat exchange channel 312.

[0106] The first confluence channel 321 is connected to the first sub-heat exchange channel 311 through the connecting channel 330; the second confluence channel 322 is connected to the second sub-heat exchange channel 312. The first sub-heat exchange channel 311 and the second sub-heat exchange channel 312 have relatively independent confluence channels. With such a setting, the flow rates of the first sub-heat exchange channel 311 and the second sub-heat exchange channel 312 can be designed and adjusted according to the specific heat requirements of different regions of the battery 200, so as to ensure that the temperatures of different regions of the battery 200 can be effectively controlled. For example, for the regions of the battery 200 with large heat generation, more efficient heat exchange channels 310 can be designed, and for the regions of the battery 200 with small heat generation, relatively simple heat exchange channels 310 can be designed, thereby optimizing the performance of the heat exchange member 300 and ensuring the temperature balance of each region of the battery 200.

[0107] When the first confluence channel 321 is arranged on a different layer from the heat exchange channel 310, it is avoided that the first confluence channel 321 and the second confluence channel 322 are laid flat in the horizontal direction. In this way, the occupied area of the confluence channel 320 can be reduced, and further the occupied area of the heat exchange channel 310 can be increased as much as possible, so that the heat exchange channel 310 can be better divided into relatively independent first sub-heat exchange channels 311 and second sub-heat exchange channels 312, and further the dual control of different regions of the battery 200 is realized.

[0108] Specifically, the battery 200 includes a first heat generation area and a second heat generation area. The first heat generation area and the second heat generation area are arranged along the first direction, and the first heat generation area is located on at least one side of the second heat generation area; the heat generation amount of the first heat generation area is greater than that of the second heat generation area. The number of the first heat generation areas is two, and the two first heat generation areas are respectively arranged on both sides of the second heat generation area.

[0109] The first heat generation area corresponds to the first sub-heat exchange channel 311 to facilitate heat exchange between the first sub-heat exchange channel 311 and the first heat generation area; the second heat generation area corresponds to the second sub-heat exchange channel 312 to facilitate heat exchange between the second sub-heat exchange channel 312 and the second heat generation area. In this embodiment, the first direction and the second direction intersect, where the first direction is the Figure 1 X direction in the Figure 2 and the second direction is the Figure 1 Y direction in the Figure 2 and

[0110] It should be noted that in this embodiment, the first heat generation area may be the area opposite to the pole column of the battery pack. The heat generation in this area is relatively large and is usually located at both ends of the battery pack in the second direction; the second heat generation area may be other areas of the battery pack except the area opposite to the pole column. The heat generation in this area is relatively small and is usually the middle area of the battery pack.

[0111] In this embodiment, the first sub-heat exchange flow channel 311 exchanges heat with the first heat generation area, and the second sub-heat exchange flow channel 312 exchanges heat with the second heat generation area, so as to utilize the independent control of the first sub-heat exchange flow channel 311 and the second sub-heat exchange flow channel 312, adopt different flow rate strategies, adjust the cooling capacity distribution of each heat generation area, so that different heat exchange flow channels 310 have different heat exchange capabilities, thereby reducing the temperature difference between the first heat generation area and the second heat generation area, and thus reducing the temperature difference of the battery pack.

[0112] It should be noted that the number of the heat exchange flow channels 310 can be one or multiple. Exemplarily, please refer to the attached Figure 5 ... The number of the heat exchange flow channels 310 is multiple; the multiple heat exchange flow channels 310 are arranged in sequence along the first direction and are independent of each other. Among them, the number of the heat exchange flow channels 310 matches the number of the batteries 200. For example, each heat exchange flow channel 310 can exchange heat with one battery 200, expanding the applicable range of the heat exchange member 300.

[0113] Among them, the first converging flow channel 321 is communicated with the first sub-heat exchange flow channels 311 of each heat exchange flow channel 310 through the communicating flow channel 330; the second converging flow channel 322 is communicated with the second sub-heat exchange flow channels 312 of each heat exchange flow channel 310. With such a setting, the fluid can flow in each heat exchange flow channel 310, and thus heat exchange can be performed on different batteries 200. It should be noted that in order to ensure that the fluid can flow in the first sub-heat exchange flow channel 311 and the second sub-heat exchange flow channel 312, both the first converging flow channel 321 and the second converging flow channel 322 include two flow channels, one of which is used as the liquid inlet flow channel and the other is used as the liquid outlet flow channel.

[0114] Exemplarily, please refer to the attached Figure 4 ... the attached Figure 8 ... and the attached Figure 12 ... The first converging flow channel 321 includes a first sub-converging flow channel 3211 and a second sub-converging flow channel 3212. The first sub-converging flow channel 3211 and the second sub-converging flow channel 3212 are respectively located on both sides of the heat exchange flow channel 310.

[0115] Meanwhile, the second confluence channel 322 includes a third sub-confluence channel 3221 and a fourth sub-confluence channel 3222. The third sub-confluence channel 3221 and the fourth sub-confluence channel 3222 are respectively located on both sides of the heat exchange channel 310, and are respectively connected to the first end and the second end of the second sub-heat exchange channel 312. Wherein, the first end of the second sub-heat exchange channel 312 can be one of the liquid inlet end and the liquid outlet end, and the second end can be the other of the liquid inlet end and the liquid outlet end. It should be noted that the third sub-confluence channel 3221 and the fourth sub-confluence channel 3222 are respectively located on both sides of the heat exchange channel 310, which can be understood as the third sub-confluence channel 3221 and the fourth sub-confluence channel 3222 are respectively located on both sides of the heat exchange channel 310 in the second direction, or can be located on both sides of the heat exchange channel 310 in the vertical direction (please refer to the appendix Figure 12 ).

[0116] The communication channel 330 includes a first communication channel and a second communication channel. Among them, the first sub-confluence channel 3211 is connected to the first end of the first sub-heat exchange channel 311 through the first communication channel, and the second sub-confluence channel 3212 is connected to the second end of the first sub-heat exchange channel 311 through the second communication channel. Wherein, the first end can be one of the liquid inlet end and the liquid outlet end of the first sub-heat exchange channel 311, and the second end can be the other of the liquid inlet end and the liquid outlet end of the first sub-heat exchange channel 311.

[0117] It should be noted that, in this embodiment, the number of the first connection channels and the second communication channels can be arranged according to the layout and the number of the heat exchange channels. For example, when the number of the heat exchange channels 310 is four, and each heat exchange channel 310 includes two first sub-heat exchange channels 311 and one second sub-heat exchange channel 312, the number of the first communication channels and the number of the second communication channels are both five. Taking the orientation shown in the appendix Figure 7 as an example, among them, the first first communication channel connects the first sub-confluence channel 3211 to the first end of the first first sub-heat exchange channel 311 of the first heat exchange channel 310; the second first communication channel connects the first sub-confluence channel 3211 to the first ends of the second first sub-heat exchange channel 311 of the first heat exchange channel 310 and the first first sub-heat exchange channel 311 of the second heat exchange channel 310, and so on. The fifth first communication channel connects the first end of the second first sub-heat exchange channel 311 of the fourth heat exchange channel 310; correspondingly, the connection mode of the second communication channel is the same as that of the first communication channel, and this embodiment will not be elaborated here.

[0118] In a possible implementation manner, please refer to appendix Figure 1 and appendix Figure 14 , the heat exchange member 300 includes a flow channel plate 340 and a heat pipe plate 350 arranged in a stacked manner. The heat pipe plate 350 is arranged on the flow channel plate 340 and encloses an integral body with the flow channel plate 340.

[0119] At least part of the confluence flow channel 320 and the heat exchange flow channel 310 are disposed between the flow channel plate 340 and the heat spreader 350. In one example, please continue to refer to the attached Figure 4 to the attached Figure 6 , the first confluence flow channel 321, the second confluence flow channel 322 and the heat exchange flow channel 310 are arranged on the same layer and are all formed on the flow channel plate 340. Exemplarily, the first confluence flow channel 321, the second confluence flow channel 322 and the heat exchange flow channel 310 can be formed on the flow channel plate 340 by a stamping process. After that, the heat spreader 350 is covered on the flow channel plate 340, and the heat spreader 350 is fixed on the flow channel plate 340 by welding or bolts.

[0120] In this embodiment, the stamping process is used to form the second confluence flow channel 322 and the heat exchange flow channel 310 on the flow channel plate 340, which can simplify the manufacturing process, improve production efficiency and reduce manufacturing costs.

[0121] In another example, please refer to the attached Figure 8 , the confluence flow channel 320 includes a first confluence flow channel 321 and a second confluence flow channel 322 arranged on different layers; the second confluence flow channel 322 and the heat exchange flow channel 310 are disposed between the flow channel plate 340 and the heat spreader 350. In other words, the first confluence flow channel 321 can be an independent component. With such an arrangement, the formation method and structure of the first confluence flow channel 321 can be freely set, which helps to improve the design flexibility of the heat exchange member 300.

[0122] Please continue to refer to the attached Figure 5 and the attached Figure 6 , the heat exchange member 300 includes an auxiliary plate 360, and the auxiliary plate 360 is stacked on the side of the heat spreader 350 facing away from the flow channel plate 340; for example, the auxiliary plate 360 is disposed on the side of the heat spreader 350 facing away from the flow channel plate 340. In this example, the auxiliary plate 360 can be fixed on the heat spreader 350 by a welding process to improve the connection stability between the auxiliary plate 360 and the heat spreader 350.

[0123] The first confluence flow channel 321 is located between the auxiliary plate 360 and the heat spreader 350. For example, the first confluence flow channel 321 can be formed on the auxiliary plate 360 by a stamping process. When the heat spreader 350 is covered on the auxiliary plate 360, a closed first confluence flow channel 321 is formed between the auxiliary plate 360 and the heat spreader 350. In this embodiment, the design of the heat exchange member 300 is made more compact by the stacked arrangement of the auxiliary plate 360 and the heat spreader 350, effectively utilizing the internal space, reducing the volume and weight of the heat exchange member 300, and adapting to different application scenarios and working conditions.

[0124] In this embodiment, the first confluence flow channel 321 formed between the auxiliary plate 360 and the heat spreader 350 is facing the second confluence flow channel 322. When the fluid circulation is enabled for thermal management, there is a heat spreader 350 between the first confluence flow channel 321 and the second confluence flow channel 322, and they do not contact other structures of the support member 100, the battery 200, and other structures of the heat exchange member 300, effectively avoiding the loss of cold / heat caused by unnecessary heat exchange.

[0125] To facilitate the connection between the first confluence flow channel 321 and the heat exchange flow channel 310, please refer to the appendix Figure 14 , a communication hole 351 is provided on the heat spreader 350 provided in this embodiment. The communication hole 351 correspondingly communicates the first confluence flow channel 321 and the first sub-heat exchange flow channel 311, and the communication hole 351 forms a communication flow channel 330. Through the setting of the communication hole 351 in this embodiment, the manufacturing process can be simplified, the processing steps can be reduced, the production efficiency can be improved, and the manufacturing cost can be reduced; it can also ensure the effective conduction of the fluid between different flow channels, reduce the thermal conduction resistance, and improve the thermal conduction efficiency and performance of the heat exchange member 300.

[0126] In a possible implementation manner, please refer to the appendix Figure 7 , the auxiliary plate 360 includes a first auxiliary plate 361 and a second auxiliary plate 362. The first auxiliary plate 361 extends along the second direction; the second auxiliary plate 362 is connected to the first auxiliary plate 361 and extends along the first direction; the first direction intersects the second direction. Among them, the first direction is the X direction in the appendix Figure 7 , and the second direction is the Y direction in the appendix Figure 7 .

[0127] In this embodiment, considering that the thicknesses of both the heat spreader 350 and the flow channel plate 340 are less than 1.5 mm, and the overall size of the heat exchange member 300 is approximately 1200 mm × 2000 mm, its overall structural strength is relatively poor. Therefore, through the setting of the L-shaped auxiliary plate 360 in this embodiment, a strengthening effect is achieved in the mechanical structure. In addition, the auxiliary plate 360 is connected to the heat spreader 350 by welding, which can improve the structural strength of the heat exchange member 300 and prevent the heat exchange member 300 from deforming.

[0128] In this embodiment, the number of the heat exchange members 300 can be one or two. When the number of the heat exchange members 300 is two, one of the heat exchange members 300 is fixed to the support member 100 by screws or bolts, and the other heat exchange member 300 is installed on the support member 100 by friction stir welding. This structure has been evaluated and has no impact on the airtightness and welding fixation strength of the battery pack after assembly.

[0129] It should be noted that when the first confluence flow channel 321, the second confluence flow channel 322 and the heat exchange flow channel 310 are arranged on the same layer and are all formed on the flow channel plate 340. The connecting flow channel 330 can also have other arrangement ways. Exemplarily, please refer to the attached Figure 1 , the heat exchange member 300 further includes a bridging member 370. The bridging member 370 is arranged on the side of the heat dissipation plate 350 away from the flow channel plate 340 and encloses a connecting flow channel 330 with the heat dissipation plate 350; the heat dissipation plate 350 includes a first communication hole and a second communication hole arranged at intervals; one end of the connecting flow channel 330 is communicated with the first confluence flow channel 321 through the first communication hole, and the other end of the connecting flow channel 330 is communicated with the first sub-heat exchange flow channel 311 through the second communication hole.

[0130] It should be noted that the structure of the bridging member 370 can have various selections. In one example, please refer to the attached Figure 4 , the bridging member 370 can include a bridging plate. For example, grooves can be formed on one side of the bridging plate through a stamping process. When the bridging plate is connected to the heat dissipation plate 350, for example, the bridging plate is connected to the side of the heat dissipation plate 350 away from the flow channel plate 340, and a bridging flow channel is enclosed between the bridging plate and the heat dissipation plate 350.

[0131] In another example, the bridging member 370 can also be a bridging pipe. The bridging pipe can include a main pipe and connecting pipes respectively communicated with the main pipe. One of the connecting pipes is welded to the first communication hole, and the other connecting pipe is welded to the second connection hole.

[0132] In still another example, the heat exchange member 300 is used to be installed on a support member of the battery pack, and the support member can include a side beam. An avoidance area can be provided on the side beam in this embodiment. The avoidance area is used to form a bridging flow channel. In this way, the requirement for additional components can be reduced, thereby simplifying the overall structural design, reducing the weight of the battery pack, and being beneficial to improving the energy density of the battery.

[0133] Please refer to the attached Figure 1 to the attached Figure 3 , in a possible implementation manner, the battery pack includes a support member 100. The support member 100 serves as a support component of the battery pack and is used to support the battery 200 and the heat exchange member 300; in addition, the support member 100 can also serve as a connecting component to realize the installation between the battery pack and the target component. For example, when the battery pack is applied to a vehicle, the support member 100 can be installed on the vehicle body. The material of the support member 100 provided in this embodiment includes but is not limited to aluminum.

[0134] Among them, please refer to the attached Figure 2 and the attached Figure 3, the support member 100 includes a first region 110 and a second region 120, and the second region 120 is disposed on at least one side of the first region 110. For example, the second region 120 is disposed on one side of the first region 110, or can be disposed on both sides of the first region 110, or even can be disposed around the first region 110.

[0135] The first region 110 is used to carry the battery 200, that is, the battery 200 is disposed on the first region 110. The second region 120 can be a fixed area of the support member 100, and the support member 100 can be mounted to a target component. It should be noted that the first region 110 can be Figure 2 the region below the dashed line in the attachment, and the second region 120 can be Figure 2 the region above the dashed line in the attachment.

[0136] Please refer to the attachment Figure 2 and the attachment Figure 3 , the heat exchange member 300 is disposed on the support member 100. For example, the heat exchange member 300 is disposed on the side of the support member 100 facing away from the battery 200. The heat exchange member 300 is in contact with the battery 200 and exchanges heat with the battery 200.

[0137] Wherein, the orthographic projection of the heat exchange flow channel 310 on the plane where the support member 100 is located at least covers the first region 110, and the orthographic projection of the confluence flow channel 320 on the plane where the support member 100 is located is located in the second region 120, so that the orthographic projection of the confluence flow channel 320 on the plane where the support member 100 is located is misaligned with the battery 200 to avoid direct contact with the battery 200. With such a setting, on the one hand, the space of the heat exchange flow channel 310 can be increased to improve the heat exchange capacity of the heat exchange member 300; on the other hand, the flow channels corresponding to the battery 200 can be heat exchange flow channels 310 that have completed flow distribution, reducing the influence of the confluence flow channel 320 on the temperature difference of each region of the battery 200, improving the heat balance of each region of the battery 200, and improving the safety of the battery pack.

[0138] In a possible implementation manner, please continue to refer to the attachment Figure 2 and the attachment Figure 3 , the heat exchange member 300 is connected to the first region 110, and the heat exchange member 300 and the first region 110 have a connection point 140. Wherein, the connection point 140 can be a bolt hole. For example, alignment bolt holes can be formed on the heat exchange member 300 and the first region 110, and the alignment bolt holes are connected together by bolts, thereby realizing the fixed connection between the heat exchange member 300 and the support member 100. In this embodiment, the heat exchange member 300 and the support member 100 are connected together by bolts, which can reduce the risk of loosening or falling off caused by vibration or other external forces.

[0139] The orthographic projection of the confluence flow channel 320 on the plane where the support member 100 is located has a preset distance from the connection point 140. It should be understood that the preset distance can be greater than the safety distance between the outer peripheral surface of the bolt facing the heat exchange flow channel 310 and the heat exchange flow channel 310. In this way, the orthographic projection of the confluence flow channel 320 on the plane where the support member 100 is located is misaligned with the battery 200, which can maximize the space of the heat exchange flow channel 310 and improve the heat exchange capacity of the heat exchange member 300; it can also ensure that the flow channels corresponding to the battery 200 are all heat exchange flow channels 310 that have completed flow division, guaranteeing the temperature uniformity of each area of the battery 200.

[0140] It should be understood that the orthographic projection of the confluence flow channel 320 on the plane where the support member 100 is located has a preset distance from the connection point 140. It should be understood that the preset distance can be greater than the safety distance between the outer peripheral surface of the bolt facing the heat exchange flow channel 310 and the heat exchange flow channel 310. Exemplarily, the orthographic projection of the confluence flow channel 320 on the plane where the support member 100 is located is spaced from the connection point 140. In this way, the distance between the confluence flow channel 320 and the connection point 140 can be increased, avoiding damage to the confluence flow channel 320 by the bolt, thereby preventing fluid leakage and improving the safety of the battery pack.

[0141] Please continue to refer to the appendix Figure 1 In a possible implementation, the support member 100 includes a side beam 130 that extends in the second direction; the orthographic projection of the confluence flow channel 320 on the support member 100 covers at least part of the side beam 130. Among them, the orthographic projection of the confluence flow channel 320 on the support member 100 can cover all of the side beam 130 or part of the side beam 130. Such a setting can facilitate the layout of the first sub-heat exchange flow channel 311 and the second sub-heat exchange flow channel 312 of the heat exchange flow channel 310, enabling the first sub-heat exchange flow channel 311 to exchange heat for the first heat generation area with a larger heat generation amount, and the second sub-heat exchange flow channel 312 to exchange heat for the second heat generation area with a smaller heat generation amount, thereby achieving a more uniform and efficient heat exchange effect, further helping to maintain the temperature consistency of the battery, extend the battery life and improve the battery performance. In addition, the side beam 130 can be used to provide support for the confluence flow channel 320, improving the stability of the battery pack.

[0142] Please continue to refer to the appendix Figure 1 The side beam 130 is provided with an avoidance area; the avoidance area is used to avoid the auxiliary plate 360 or the bridging member 370. Thereby protecting the auxiliary plate 360 or the bridging member 370 from external physical damage and environmental impacts, helping to extend the service life of the auxiliary plate 360 or the bridging member 370 and improve the reliability of the battery pack. In addition, the auxiliary plate 360 is opposite to the side beam of the support member and is misaligned with the battery 200 to ensure that the auxiliary plate 360 does not affect the heat dissipation effect of the battery 200.

[0143] It should be understood that the following examples take the auxiliary plate 360 as an example to describe in detail the function of the avoidance area.

[0144] In this embodiment, there is a gap between the auxiliary plate 360 and the inner wall of the avoidance area. For example, along the thickness direction of the support member 100, the distance between the surface of the auxiliary plate 360 facing away from the heat exchange member 300 and the heat exchange member 300 is 4 mm, then the distance between the bottom wall of the avoidance area and the heat exchange member 300 is greater than 4 mm. With such a setting, on the one hand, it allows the auxiliary plate 360 to have a certain degree of freedom during the thermal expansion and contraction process, thereby reducing the influence of thermal stress on the auxiliary plate 360 and the avoidance area, helping to extend the service life of the battery pack and improve the reliability of the battery pack; on the other hand, it can play a role in shock absorption and vibration absorption, reducing the mechanical stress on the auxiliary plate 360 during operation, which helps to improve the stability and durability of the battery pack.

[0145] The embodiment of the present application also provides an electrical equipment, including an electrical device and the battery pack described in any of the above embodiments. The battery pack is electrically connected to the electrical device and is used to provide electrical energy for the electrical device.

[0146] The electrical equipment in the embodiment of the present application can be a vehicle. For example, the vehicle can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. Correspondingly, the electrical device can be a driving mechanism of the vehicle or a control system of the vehicle.

[0147] In addition, the electrical equipment can also be other energy storage devices, such as mobile phones, portable devices, laptop computers, electric toys, electric tools, ships and spacecrafts, etc. Among them, the spacecraft can include airplanes, rockets, space shuttles or spaceships.

[0148] In view of the fact that the electrical equipment in this embodiment includes the battery pack described in any of the above embodiments, therefore, the electrical equipment includes the battery pack structure and beneficial effects, which will not be elaborated herein.

[0149] In this specification, the embodiments or implementation manners are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts among the embodiments can be referred to each other.

[0150] It should be noted that phrases such as "an embodiment", "embodiments", "exemplary embodiments", "some embodiments", etc. mentioned in the specification indicate that the described embodiments may include specific features, structures or characteristics, but not necessarily every embodiment includes such specific features, structures or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. Moreover, when combining a specific feature, structure or characteristic with an embodiment, it is within the knowledge scope of those skilled in the art to implement such a feature, structure or characteristic in combination with other embodiments, whether explicitly or implicitly described.

[0151] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery pack, characterized in that, Comprising: A heat exchange member (300), the heat exchange member (300) comprising a heat exchange flow channel (310) and a confluence flow channel (320), the confluence flow channel (320) being disposed on one side of the heat exchange flow channel (310) and communicating with the heat exchange flow channel (310); A battery (200), the heat exchange member (300) being disposed opposite to the battery (200), and a positive projection of the battery (200) on the heat exchange member (300) being located within the heat exchange flow channel (310) and exchanging heat with the heat exchange flow channel (310).

2. The battery pack according to claim 1, characterized in that, The confluence flow channel (320) is disposed on the same layer as the heat exchange flow channel (310).

3. The battery pack according to claim 2, characterized in that, The confluence flow channel (320) comprises a first confluence flow channel (321) and a second confluence flow channel (322), the first confluence flow channel (321), the second confluence flow channel (322) and the heat exchange flow channel (310) being disposed on the same layer; At least one of the first confluence flow channel (321) and the second confluence flow channel (322) communicates with the heat exchange flow channel (310) through a communication flow channel (330).

4. The battery pack according to claim 2, characterized in that, The confluence flow channel (320) comprises a first confluence flow channel (321) and a second confluence flow channel (322), at least one of the first confluence flow channel (321) and the second confluence flow channel (322) being disposed on a different layer from the heat exchange flow channel (310); Wherein, the confluence flow channel disposed on a different layer from the heat exchange flow channel (310) is communicated through a communication flow channel (330).

5. The battery pack according to claim 4, wherein, The first confluence flow channel (321) is disposed on a different layer from the heat exchange flow channel (310), and the second confluence flow channel (322) is disposed on the same layer as the heat exchange flow channel (310); The first confluence flow channel (321) communicates with the heat exchange flow channel (310) through the communication flow channel (330).

6. The battery pack according to claim 5, characterized in that, Along the stacking direction of the first confluence flow channel (321) and the heat exchange flow channel (310), a positive projection of the first confluence flow channel (321) on the plane where the second confluence flow channel (322) is located at least partially coincides with the second confluence flow channel (322).

7. The battery pack according to any one of claims 4-6, characterized in that, Along the stacking direction of the confluence flow channel (320) and the heat exchange flow channel (310), the communication flow channel (330) is disposed between the confluence flow channel (320) and the heat exchange flow channel (310).

8. The battery pack according to any one of claims 1-6, characterized in that, The heat exchange flow channel (310) comprises a plurality of sub-heat exchange flow channels, and the plurality of sub-heat exchange flow channels are independent of each other; The battery (200) comprises a plurality of heat generating regions with different heat generation amounts; Each of the sub-heat exchange flow channels respectively exchanges heat with each of the heat generating regions.

9. The battery pack according to claim 8, wherein The sub-heat exchange flow channel comprises a first sub-heat exchange flow channel (311) and a second sub-heat exchange flow channel (312) disposed on the same layer, the first sub-heat exchange flow channel (311) being disposed on at least one side of the second sub-heat exchange flow channel (312); The confluence flow channel (320) comprises a first confluence flow channel (321) and a second confluence flow channel (322) disposed on different layers; the first confluence flow channel (321) communicates with the first sub-heat exchange flow channel (311) through a communication flow channel (330), and the second confluence flow channel (322) communicates with the second sub-heat exchange flow channel (312).

10. The battery pack according to claim 9, characterized in that, The heating area includes a first heating area and a second heating area, and the first heating area is disposed on at least one side of the second heating area; The first sub-heat exchange flow channel (311) is used for heat exchange with the first heating area, and the second sub-heat exchange flow channel (312) is used for heat exchange with the second heating area.

11. The battery pack according to claim 10, characterized in that, The number of the first sub-heat exchange flow channels (311) is two, and the two first sub-heat exchange flow channels (311) are respectively disposed on both sides of the second sub-heat exchange flow channel (312); The number of the first heating areas is two, and the two first heating areas are respectively disposed on both sides of the second heating area.

12. The battery pack according to any one of claims 9-11, characterized in that, The number of the heat exchange flow channels (310) is multiple; the multiple heat exchange flow channels (310) are arranged in sequence along a first direction and are independent of each other; The first converging flow channel (321) is communicated with the first sub-heat exchange flow channels (311) of each of the heat exchange flow channels through the communicating flow channel (330); The second converging flow channel (322) is communicated with the second sub-heat exchange flow channels (312) of each of the heat exchange flow channels.

13. The battery pack according to claim 12, wherein, The number of the heat exchange flow channels (310) is multiple; the multiple heat exchange flow channels (310) are arranged in sequence along a first direction and are independent of each other; the first converging flow channel (321) is communicated with the first sub-heat exchange flow channels (311) of each of the heat exchange flow channels through the communicating flow channel (330); the second converging flow channel (322) is communicated with the second sub-heat exchange flow channels (312) of each of the heat exchange flow channels.

14. The battery pack according to claim 13, wherein The first converging flow channel (321) includes a first sub-converging flow channel (3211) and a second sub-converging flow channel (3212), and the first sub-converging flow channel (3211) and the second sub-converging flow channel (3212) are respectively located on both sides of the heat exchange flow channel; The communicating flow channel (330) includes a first communicating flow channel and a second communicating flow channel; The first sub-converging flow channel (3211) is communicated with a first end of the first sub-heat exchange flow channel (311) through the first communicating flow channel; The second sub-converging flow channel (3212) is communicated with a second end of the first sub-heat exchange flow channel (311) through the second communicating flow channel.

15. The battery pack according to claim 14, characterized in that, The second converging flow channel (322) includes a third sub-converging flow channel (3221) and a fourth sub-converging flow channel (3222), and the third sub-converging flow channel (3221) and the fourth sub-converging flow channel (3222) are respectively located on both sides of the heat exchange flow channel and are respectively communicated with a first end and a second end of the second sub-heat exchange flow channel (312).

16. The battery pack according to any one of claims 9-11, characterized in that, The heat exchange member (300) includes a flow channel plate (340) and a heat pipe (350) which are stacked, and the heat exchange flow channel (310) and at least part of the converging flow channel (320) are disposed between the flow channel plate (340) and the heat pipe (350).

17. The battery pack according to claim 16, wherein The converging flow channel (320) includes a first converging flow channel (321) and a second converging flow channel (322) which are disposed on different layers; the second converging flow channel (322) and the heat exchange flow channel are disposed between the flow channel plate (340) and the heat pipe (350).

18. The battery pack according to claim 17, characterized in that, The heat exchange member (300) includes an auxiliary plate (360), and the auxiliary plate (360) is stacked on a side of the heat pipe (350) facing away from the flow channel plate (340); The first converging flow channel (321) is located between the auxiliary plate (360) and the heat pipe (350).

19. The battery pack according to claim 18, wherein, A communication hole (351) is formed in the heat pipe (350), and the communication hole (351) correspondingly communicates the first converging flow channel (321) and the first sub-heat exchange flow channel (311), and the communication hole (351) forms the communication flow channel (330).

20. The battery pack according to claim 18 or 19, characterized in that, The auxiliary plate (360) includes a first auxiliary plate (361) and a second auxiliary plate (362), and the first auxiliary plate (361) extends along a second direction; The second auxiliary plate (362) is connected to the first auxiliary plate (361) and extends along a first direction; The first direction intersects the second direction.

21. The battery pack according to claim 16, characterized in that, The heat exchange member (300) further includes a bridging member (370), and the bridging member (370) is disposed on a side of the heat pipe (350) facing away from the flow channel plate (340) and encloses the communication flow channel (330) with the heat pipe (350); The heat pipe (350) includes a first communication hole and a second communication hole which are spaced apart; One end of the communication flow channel (330) communicates with the first converging flow channel (321) through the first communication hole, and the other end of the communication flow channel (330) communicates with the first sub-heat exchange flow channel (311) through the second communication hole.

22. The battery pack according to any one of claims 1-6, characterized in that, The battery pack further includes a support member (100), and the support member (100) includes a first region (110) and a second region (120), and the second region (120) is disposed on at least one side of the first region (110); The heat exchange member (300) is disposed on the support member (100), and the heat exchange flow channel (310) is disposed on the first region (110), and the converging flow channel (320) is disposed on the second region (120).

23. The battery pack according to claim 22, characterized in that, The heat exchange member (300) is connected to the first region (110), and the heat exchange member (300) and the first region (110) have a connection point (140); A positive projection of the converging flow channel (320) extending along the first direction on a plane where the support member (100) is located is located on a side of the connection point (140) facing away from the first region (110).

24. The battery pack according to claim 23, characterized in that, A preset distance exists between a positive projection of the converging flow channel extending along the first direction on a plane where the support member (100) is located and the connection point (140).

25. The battery pack according to claim 23 or 24, characterized in that, The support member (100) includes a side beam (130), and the side beam (130) extends along the second direction; a positive projection of the converging flow channel on the support member covers at least a part of the side beam.

26. The battery pack according to claim 25, wherein The side beam (130) is provided with an avoidance area; the avoidance area is used for avoiding the auxiliary plate (360) or the bridging member (370).

27. An electrical device, characterized in that, An electric device and the battery pack according to any one of claims 1-26, the battery pack is electrically connected to the electric device and is used to supply electric energy to the electric device.

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