Battery assembly and battery device

Abstract

The application relates to the technical field of batteries, in particular to a battery assembly and a battery device. The battery assembly comprises a battery cell group, a cooling plate and an air cooling group. The cooling plate comprises a fixed part and an extension part connected along a first direction, the fixed part is fixed below the battery cell group, and the extension part is away from the battery cell group; the extension part comprises an extension unit and an air cooling unit; the extension unit extends along the first direction, the air cooling unit extends upward along a second direction, the first direction is perpendicular to the second direction, and the second direction is parallel to the thickness direction of the battery cell group. The air cooling group comprises an air cooling shell, the air cooling shell comprises an air cooling inlet and an air cooling outlet; the air cooling outlet is used for fixing a fan, the fan is used for driving air to enter the air cooling shell from the air cooling inlet and flow out of the air cooling shell from the air cooling outlet; the air cooling shell comprises an inlet section and an outlet section; the air cooling inlet is arranged in the inlet section; and the air cooling outlet is arranged in the outlet section. The air cooling unit is arranged in the air cooling shell and located in the outlet section.

Description

Technical Field

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

[0002] In the field of battery technology, the thermal management performance of batteries directly affects their safety, service life, and operating efficiency. Currently, mainstream battery thermal management methods rely on liquid cooling systems to transfer heat from the battery pack. This system removes heat generated by the battery pack by circulating coolant within a liquid cooling plate. However, the coolant circulation relies on the continuous operation of a compressor, which requires continuous external energy input. This results in high energy consumption for the entire thermal management system, which is not conducive to improving the energy utilization efficiency of the battery system. Summary of the Invention

[0003] The present application provides a battery assembly and a battery device to address some or all of the deficiencies in the related art.

[0004] A first aspect of an embodiment of the present application provides a battery assembly, comprising:

[0005] Battery cell pack;

[0006] The cooling plate includes a fixed portion and an extension portion connected along a first direction, wherein the fixed portion is fixed below the battery cell group and the extension portion is away from the battery cell group; the extension portion includes an extension unit and an air cooling unit; the extension unit extends along the first direction, and the air cooling unit extends upward along the second direction, wherein the first direction is perpendicular to the second direction, and the second direction is parallel to the thickness direction of the battery cell group;

[0007] An air cooling group includes an air cooling housing, the air cooling housing includes an air cooling inlet and an air cooling outlet; the air cooling outlet is used to fix a fan, the fan is used to drive air into the air cooling housing from the air cooling inlet and out of the air cooling housing from the air cooling outlet; the air cooling housing includes an inlet section and an outlet section; the air cooling inlet is opened at the inlet section; the air cooling outlet is opened at the outlet section;

[0008] Wherein, the air cooling unit is arranged in the air cooling shell and is located in the outlet section.

[0009] Furthermore, the extending portion is provided with a through hole penetrating along the thickness direction, the air cooling unit is provided with at least a portion of the through holes, and the air cooling unit is located in the air cooling shell.

[0010] Furthermore, a cooling channel is provided inside the cooling plate, and the cooling channel is used for the flow of a cooling medium for heat exchange;

[0011] There are multiple through holes, and cooling channels are provided between adjacent through holes.

[0012] Furthermore, the extension portion further includes a connecting unit, and both ends of the connecting unit are smoothly connected to the extension unit and the air cooling unit respectively;

[0013] The connecting unit is provided with the through hole.

[0014] Furthermore, the air cooling group also includes an air guide plate; the air guide plate is arranged inside the air cooling shell and is arranged toward the air cooling inlet, and is used to control the opening of the air cooling inlet.

[0015] Furthermore, the air cooling group further includes a controller and a refrigeration module; the refrigeration module is located outside the air cooling housing, and the cold air outlet of the refrigeration module is arranged toward the air cooling inlet;

[0016] When the outside temperature is higher than the internal temperature of the air-cooled housing, the controller controls the refrigeration module to turn on.

[0017] Furthermore, the air-cooled housing includes:

[0018] A main body, wherein the main body is provided with a through opening, wherein the opening is used to allow the cooling plate to pass through and enter the interior of the air-cooled housing;

[0019] A cover body is provided, and the cover body covers the opening.

[0020] Furthermore, a positioning notch is provided on the main body, and the positioning notch is located above the opening; a positioning protrusion is provided on the cover, and the positioning protrusion enters the positioning notch;

[0021] The cooling plate is provided with a plurality of through holes penetrating along the thickness direction, and at least a portion of the through holes extends to the opening; a limiting protrusion is provided on the cover body, and the limiting protrusion enters the through holes.

[0022] Furthermore, the peripheral side of the cover body extends outward to form a widened portion, and the width of the widened portion is greater than the distance between adjacent through holes;

[0023] The widened portion extends from the peripheral side of the cover to below the cooling plate;

[0024] A positioning screw hole is provided on the portion of the widened portion located below the cooling plate; the battery assembly further comprises a fastener, which enters the positioning screw hole and is fixedly connected to the cooling plate; the fastener also enters the through hole.

[0025] Furthermore, the battery assembly further includes a radiator, which is arranged on the peripheral side of the air cooling unit;

[0026] The radiator comprises a plurality of heat dissipation plates arranged at intervals;

[0027] The planes on which the multiple heat dissipation plates are located are parallel to the second direction, and are spaced apart along the third direction, and the third direction is perpendicular to the first direction and the second direction; or, the planes on which the multiple heat dissipation plates are located are parallel to the first direction, and are spaced apart along the second direction.

[0028] Furthermore, when the planes on which the plurality of heat dissipation plates are located are parallel to the second direction and are spaced apart along the third direction, the air outlet of the air-cooling housing is located on the top surface of the outlet section away from the inlet section, and there are a plurality of air outlets, and the plurality of air outlets are evenly arranged on the top surface along the third direction;

[0029] When the planes on which the multiple heat dissipation plates are located are parallel to the first direction and are spaced apart along the second direction, the air outlet of the air-cooled shell is located at the top end surface of the outlet section away from the inlet section. There are multiple air outlets, and the multiple air outlets are evenly distributed at both ends of the top end surface that are relatively arranged along the third direction.

[0030] Furthermore, along the first direction, the distance from the edge of the heat dissipation plate to the wall of the air-cooling housing is greater than or equal to 1 mm and less than or equal to 10 cm.

[0031] A second aspect of the present application provides a battery device, comprising a plurality of the battery assemblies described above; the plurality of battery assemblies are fixedly arranged along a second direction;

[0032] The battery cell group and the cooling plate in each battery assembly are fixed to form a functional module; the plurality of cooling plates are fixedly arranged along the second direction;

[0033] The outlet sections of the air-cooling shells of the multiple battery assemblies are connected along the second direction.

[0034] Furthermore, the outlet sections of the plurality of air-cooling housings are connected to form an air outlet body; the battery device further comprises a fan, which is fixed to the top of the air outlet body;

[0035] Each of the air cooling groups includes at least one air guide plate; the air guide plate is arranged inside each of the air cooling shells and is arranged toward the air cooling inlet, and is used to control the opening of the air cooling inlet;

[0036] In the second direction, the inclination angles of the air deflectors in two adjacent air-cooling shells are different, so that the opening degrees of the air-cooling inlets in the two adjacent air-cooling shells are different; the opening degree of the air-cooling inlet far from the top of the air outlet body is greater than the opening degree of the air-cooling inlet close to the top of the air outlet body, so that the air intake of the air-cooling inlet far from the top of the air outlet body is greater than the air intake of the air-cooling inlet close to the top of the air outlet body.

[0037] Further, the outlet section of the air-cooling shell extends in the second direction; the inlet section of the air-cooling shell extends in the first direction and extends away from the direction of the battery cell group, and two adjacent inlet sections are parallel and spaced apart in the second direction.

[0038] Further, the air-cooling unit of each cooling plate is provided with a through hole penetrating in the thickness direction, and the through hole is located in the air-cooling shell.

[0039] The through holes on the air-cooling units arranged adjacent in the second direction have overlapping projections in the second direction.

[0040] The technical scheme provided by the embodiment of the present application can include the following beneficial effects:

[0041] The fixed part of the cooling plate can absorb the heat of the battery cell group and transmit the heat to the extended part. The air-cooling group can air-cool and dissipate heat from the extended part of the cooling plate, thereby reducing the heat of the extended part and achieving the cooling of the battery cell group. The above-mentioned setting operation is convenient and has excellent heat dissipation performance.

[0042] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. BRIEF DESCRIPTION OF DRAWINGS

[0043] The drawings incorporated into the specification and forming part of the specification, show embodiments consistent with the present specification, and together with the specification, serve to explain the principles of the present specification.

[0044] Figure 1 An overall schematic diagram of a battery device according to an embodiment of the present application is shown;

[0045] Figure 2 A schematic diagram of a battery assembly according to an embodiment of the present application is shown;

[0046] Figure 3 A schematic diagram of a cooling plate according to an embodiment of the present application is shown;

[0047] Figure 4 A schematic diagram of a battery assembly according to another embodiment of the present application is shown;

[0048] Figure 5An overall schematic view of a battery device shown as another embodiment of the present application;

[0049] Figure 6 An overall schematic view of a battery assembly shown as another embodiment of the present application;

[0050] Figure 7 An overall schematic view of a cover shown as an embodiment of the present application.

[0051] Legend of reference signs:

[0052] 1 battery device, 10 battery assembly, 100 box cover, 200 cooling plate, 201 hot area, 202 cold area, 210 fixed part, 220 extended part, 221 extended unit, 222 air-cooled unit, 223 connecting unit, 230 through hole, 240 cooling channel, 300 cell group, 400 air-cooled group, 401 air-cooled shell, 4101 air-cooled inlet, 4102 air-cooled outlet, 4103 air outlet, 410 inlet section, 420 outlet section, 430 air outlet body, 431 first shell, 432 second shell, 440 main body, 441 opening, 442 positioning notch, 450 cover, 451 positioning protrusion, 452 widened part, 453 limiting protrusion, 454 positioning screw hole, 460 air deflector, 500 fastener, 600 radiator, 610 radiator plate body, 20 fan, X first direction, Y second direction, L third direction. DETAILED DESCRIPTION

[0053] The technical solutions in the embodiments (or, “modes”) of the present application will be described clearly and completely in conjunction with the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated.

[0054] If the embodiments of the present application involve directional indications or positional relationships (for example, up, down, left, right, front, back, inner, outer, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationships, movement conditions, etc. between components in a certain posture (as shown in the drawings); if the certain posture changes, the directional indications or positional relationships also change accordingly. In addition, the terms “first”, “second”, etc. in the embodiments of the present application are only used for convenience of description, and cannot be understood as indicating or implying relative importance.

[0055] The embodiments of the present application will be described in detail below in conjunction with the accompanying drawings. In the case of no conflict, the features in the following embodiments and modes can be supplemented or combined with each other.

[0056] Reference Figure 1-Figure 7The present application provides a battery device 1 , which includes a plurality of battery assemblies 10 .

[0057] Combined 1- Figure 3 As shown, each battery assembly 10 includes a case cover 100, a cooling plate 200, and a battery cell group 300. The cooling plate 200 is connected to the case cover 100 to form a housing for the battery assembly 10. The cooling plate 200 includes a hot region 201 and a cold region 202, as well as multiple cooling channels 240 extending from the hot region 201 to the cold region 202. The multiple cooling channels 240 are spaced apart, independent of each other, and sealed.

[0058] The battery assembly 10 further includes a cooling medium disposed in the cooling channel 240. The cooling medium receives heat from the battery cell assembly 300 in the hot region 201 and undergoes a phase change from liquid to gas. The cooling medium dissipates heat in the cold region 202 and undergoes a phase change from gas to liquid.

[0059] Continue to combine Figure 2 and Figure 3 As shown, if necessary, combined Figure 1 As shown, the cooling plate 200 includes a fixed portion 210 and an extended portion 220 connected along a first direction X. The fixed portion 210 is fixed below the battery cell group 300. In this embodiment, the fixed portion 210 is attached to the bottom of the battery cell group 300. In this case, the fixed portion 210 serves as the aforementioned hot zone 201 to receive heat from the battery cell group 300.

[0060] The extended portion 220 is located away from the cell group 300. The extended portion 220 includes an extension unit 221 and an air-cooling unit 222. The extension unit 221 extends along the first direction X, and the air-cooling unit 222 extends upward along the second direction Y. The air-cooling unit 222 serves as the aforementioned cold region 202. Of course, there is no clear demarcation between the cold region 202 and the hot region 201. The region near the cell group 300 that absorbs heat can be arbitrarily referred to as the hot region 201, while the region away from the cell group 300 that releases heat can be referred to as the cold region 202.

[0061] It should be noted that the first direction X is perpendicular to the second direction Y, and the second direction Y is parallel to the thickness direction of the battery cell group 300 .

[0062] Based on the above analysis, the cooling medium dissipates heat in the extended portion 220 (i.e., the cold region 202) and undergoes a phase transition from gas to liquid. Furthermore, the extended portion 220 extends upward, facilitating the upward flow of the gaseous cooling medium to the extended portion 220 for heat dissipation. After the phase transition to liquid form, the liquid cooling medium can then flow under the influence of gravity toward the hot region 201, i.e., the fixed portion 210, in the extended portion 220 to further absorb heat from the battery cell assembly 300. After absorbing heat in the fixed portion 210 (i.e., the hot region 201), the cooling medium then transitions from liquid to gas.

[0063] Continue to combine Figure 2-Figure 4 As shown, if necessary, combined Figure 1 As shown, each battery assembly 10 also includes an air cooling group 400. The air cooling group 400 includes an air cooling housing 401, which includes an air cooling inlet 4101 and an air cooling outlet 4102 at both ends. The air cooling outlet 4102 is used to fix the fan 20, which is used to drive air into the air cooling housing 401 through the air cooling inlet 4101 and out of the air cooling housing 401 through the air cooling outlet 4102. In other words, the fan 20 is used to create a negative pressure inside the housing.

[0064] The air-cooling housing 401 includes an inlet section 410 and an outlet section 420. The air-cooling inlet 4101 is located on a side of the inlet section 410 away from the outlet section 420; the air-cooling outlet 4102 is located on a side of the outlet section 420 away from the inlet section 410. The air-cooling unit 222 of the cooling plate 200 is disposed within the air-cooling housing 401 and is located at the outlet section 420.

[0065] In the above arrangement, the fixed portion 210 of the cooling plate 200 can absorb the heat of the battery cell group 300 and transfer the heat to the extended portion 220. The air-cooling unit 222 of the extended portion 220 is located in the air-cooling housing 401 of the air-cooling group 400, so that the extended portion 220 of the cooling plate 200 can be air-cooled to dissipate heat, accelerating the heat dissipation process in which the cooling medium in this area is converted from gas to liquid. In this process, although the temperature will not change significantly, a large amount of heat will be released due to the change in the phase of the cooling medium. The heat is then quickly conducted through the fan 20, thereby extremely reducing the heat of the extended portion 220, which is conducive to the fixed portion 210 to achieve rapid cooling of the battery cell group 300. The above arrangement is easy to operate and has excellent heat dissipation performance.

[0066] At the same time, according to the above analysis, although heat is transferred rapidly during this process, the temperature will not change significantly, thereby reducing or avoiding the generation of condensed water as much as possible, thereby ensuring the safety of the battery assembly 10.

[0067] Combination Figure 1 And Figure 5 As shown in FIG. 1, a plurality of battery assemblies 10 in the battery device 1 are fixedly arranged along a second direction Y. At this time, the cell group 300 and the cooling plate 200 in each battery assembly 10 form a functional module. A plurality of cooling plates 200 are fixedly arranged along the second direction Y. The outlet section 420 of the air-cooled shell 401 of the plurality of battery assemblies 10 is communicated along the second direction Y.

[0068] At this time, only the outlet section 420 of the air-cooled shell 401 located at the top is provided with a fan 20, and the cell group 300 in the battery assembly 10 in this row can be cooled as a whole.

[0069] Further, the outlet section 420 of each air-cooled shell 401 extends along the second direction Y. The inlet section 410 of the air-cooled shell 401 extends away from the cell group 300 along the first direction X, and two adjacent inlet sections 410 are parallel and spaced apart along the second direction Y.

[0070] In the above arrangement, the inlet section 410 of an air-cooled shell 401 is prevented from facing the air-cooled shell 401 located below and arranged adjacent to it, so that the air-cooled inlet 4101 of the air-cooled shell 401 can obtain relatively low-temperature external air, and is prevented from being able to obtain only the relatively high-temperature gas flowing out of the air-cooled shell 401 located below and having cooled the cooling plate 200 below. Through the above arrangement, when a plurality of battery assemblies 10 are stacked, the space can be better utilized, and at the same time, relatively low-temperature air can be better obtained to rapidly cool the cell group 300.

[0071] Of course, it should be noted that, since the outlet sections 420 of adjacent air-cooled shells 401 are communicated, the air-cooled shell 401 located above will inevitably receive the gas flowing out of the air-cooled shell 401 located below.

[0072] Further, as shown in FIG. 2, the air-cooled unit 222 is arranged on the extension portion 220 of the air-cooled shell 401. Figure 2 、 Figure 3 and Figure 6 As shown in FIG. 2, a through hole 230 is formed on the extension portion 220 along the thickness direction, and the air-cooled unit 222 is arranged at least partially in the through hole 230, and the air-cooled unit 222 is located in the air-cooled shell 401, and the through hole 230 is located in the air-cooled shell 401.

[0073] In the above arrangement, the through hole 230 located in the air-cooled shell 401 can be used to provide a channel for air flow, and the cooling plate 200 can be cooled more effectively.

[0074] It should be noted that, in Figure 1 and Figure 4 In order to clearly express other structural features, the through hole 230 is not shown in the figure, but it does not mean that the corresponding embodiment does not include the through hole 230.

[0075] like Figure 1 and Figure 4 As shown, if necessary, combined Figure 2 and Figure 3 As shown, multiple battery assemblies 10 are fixedly arranged along the second direction Y. The outlet sections 420 of multiple air-cooling housings 401 are connected to form an air outlet body 430. By providing through-holes 230 on the extension portion 220, air flowing out of the lower air-cooling housing 401 can flow into the upper air-cooling housing 401, partially pass through the through-holes 230 on the upper cooling plate 200, and then flow further upward.

[0076] The above arrangement is conducive to achieving heat dissipation of the entire battery device 1 .

[0077] like Figure 3 As shown, the cooling plates 200 are internally provided with cooling channels 240 for the flow of a cooling medium for heat exchange. Each cooling plate 200 is provided with a plurality of through-holes 230 , each of which is strip-shaped and spaced apart along a third direction L. Cooling channels 240 are provided between adjacent through-holes 230 .

[0078] It should be noted that the third direction L is perpendicular to the second direction Y and perpendicular to the first direction X.

[0079] In the above arrangement, the air flowing through the through hole 230 can also effectively dissipate the heat of the refrigerant in the cooling channel 240, so as to quickly realize the transformation of the refrigerant from gas to liquid.

[0080] Further, such as Figures 1-4 As shown, the extension portion 220 further includes a connecting unit 223. The two ends of the connecting unit 223 smoothly connect the extension unit 221 and the air cooling unit 222. In other words, the connecting unit 223 is bent. The through hole 230 is formed on the connecting unit 223.

[0081] By providing the curved connecting unit 223, the liquid cooling medium can flow from the cold area 202 to the hot area 201 under the influence of gravity. Furthermore, during the manufacturing process, the cooling plate 200 is bent to form a partially tilted structure (i.e., the air cooling unit 222). During this bending process, the through-holes 230 can also absorb certain variations, protecting the cooling channels 240 located within the cooling plate 200, located between adjacent through-holes 230.

[0082] Further, as shown in Figure 1 , Figure 4 and Figure 6 , the air-cooling group 400 further comprises a guide vane 460, which is arranged inside the air-cooling shell 401 and is arranged towards the air-cooling inlet 4101 for controlling the opening degree of the air-cooling inlet 4101. Specifically, both ends of the guide vane 460 are rotatably arranged in the air-cooling shell 401, and the rotation and positioning of the guide vane 460 can be driven by clicking, and of course, the rotation and positioning of the guide vane 460 can also be driven manually.

[0083] Through the above arrangement, the opening degree of the air-cooling inlet 4101 can be controlled by controlling the inclination angle of the guide vane 460, so as to control the total amount of air entering the air-cooling shell 401, and thus realize the control of the cooling speed of the battery cell group 300. When the guide vane 460 is arranged vertically, the air-cooling inlet 4101 is largely blocked, at this time, the opening degree of the air-cooling inlet 4101 is small; when the guide vane 460 is arranged horizontally, the air-cooling inlet 4101 is largely exposed, at this time, the opening degree of the air-cooling inlet 4101 is large.

[0084] It should be noted that when the plurality of battery assemblies 10 are stacked along the second direction Y to form the battery device 1, the outlet sections 420 of the plurality of air-cooling shells 401 are communicated. The battery device 1 further comprises a fan 20, which is fixed to the top of the air outlet body 430. At this time, by controlling the rotating speed of the fan 20, only the overall wind speed and the air inlet amount can be macroscopically adjusted, and the air passing amount in each battery assembly 10 cannot be correspondingly adjusted.

[0085] On this basis, each air-cooling group 400 comprises at least one guide vane 460; and each guide vane 460 is arranged in the above manner. Along the second direction Y, the inclination angles of the guide vanes 460 in the adjacent two air-cooling shells 401 are different, so that the opening degrees of the air-cooling inlets 4101 in the adjacent two air-cooling shells 401 are different.

[0086] Specifically, as shown in Figure 1 and Figure 4 , the air-cooling group 400 further comprises a guide vane 460, which is arranged inside the air-cooling shell 401 and is arranged towards the air-cooling inlet 4101 for controlling the opening degree of the air-cooling inlet 4101. Specifically, both ends of the guide vane 460 are rotatably arranged in the air-cooling shell 401, and the rotation and positioning of the guide vane 460 can be driven by clicking, and of course, the rotation and positioning of the guide vane 460 can also be driven manually.As shown, of the two adjacent air-cooling housings 401, the one located farther from the top of the air outlet body 430 serves as the first housing 431, and the other serves as the second housing 432. In other words, the upper air-cooling housing 401 of the two adjacent air-cooling housings 401 serves as the first housing 431, and the lower air-cooling housing 401 serves as the second housing 432. In this case, the air flow path for air entering through the second housing 432 and flowing out through the top of the air outlet body 430 is shorter, while the air flow path for air entering through the first housing 431 and flowing out through the top of the air outlet body 430 is longer. Therefore, it is necessary to ensure that the air flow rate entering through the first housing 431 is greater than the air flow rate entering through the second housing 432, thereby ensuring that the heat dissipation temperature of each cell group 300 in the entire battery device 1 remains relatively consistent, thereby ensuring that the temperature of the cell groups 300 remains consistent.

[0087] At this time, the opening of the air cooling inlet 4101 away from the top of the air outlet body 430 is greater than the opening of the air cooling inlet 4101 close to the top of the air outlet body 430, so that the air intake volume of the air cooling inlet 4101 away from the top of the air outlet body 430 is greater than the air intake volume of the air cooling inlet 4101 close to the top of the air outlet body 430.

[0088] In addition, it can be further explained at this time that a through hole 230 is set on the air cooling unit 222 of each cooling plate 200 and passes through the air cooling shell 401 along the thickness direction to provide air circulation along the second direction Y and dissipate heat to the cooling plate 200.

[0089] Furthermore, the through holes 230 on the air cooling units 222 adjacently arranged along the second direction Y have overlapping orthographic projections in the second direction Y. With the above arrangement, air can be easily circulated along the second direction Y and heat can be dissipated from the cooling plate 200 .

[0090] It should be noted that the inclination angle of the air guide plate 460 in the battery assembly 10 (ie, the opening of the air cooling inlet 4101 ) can be flexibly adjusted according to actual conditions, and does not necessarily have to meet the above-mentioned size requirements.

[0091] Specifically, it can be flexibly adjusted according to the temperature of the cell group 300. When the temperature of the cell group 300 in the battery assembly 10 is higher than that of the other cell groups 300 in the battery device 1, the inclination angle of the air guide plate 460 is adjusted to increase the opening of the air cooling inlet 4101 of the battery assembly 10, allowing more air to quickly flow into the air cooling housing 401 and quickly dissipate heat from the cooling plate 200. Conversely, if the temperature of one of the cell groups 300 is too low, the inclination angle of the air guide plate 460 is adjusted to reduce the opening of the air cooling inlet 4101 of the battery assembly 10, appropriately reducing the heat dissipation rate of the cooling plate 200. The temperature of the cell group 300 can be tested by providing a temperature sensor on the cell group 300. Of course, a corresponding temperature sensor can also be provided on each cooling plate 200 to reflect the temperature of the cell group 300 by detecting the temperature of the cooling plate 200.

[0092] Furthermore, the air cooling group 400 also includes a controller (not shown) and a refrigeration module (not shown). The refrigeration module is located outside the air cooling housing 401, and the cold air outlet of the refrigeration module is arranged toward the air cooling inlet 4101. When the outside temperature is higher than the internal temperature of the air cooling housing 401, it means that directly drawing air from the outside can no longer effectively and quickly dissipate heat from the cooling plate 200. At this time, the controller controls the refrigeration module to turn on, and the refrigeration module prepares cold air with a lower temperature. The fan 20 draws the cold air into the air cooling housing 401. The cold air can effectively and quickly dissipate heat from the cooling plate 200, thereby achieving rapid heat dissipation of the battery cell group 300.

[0093] Furthermore, in order to achieve rapid assembly and disassembly of the air-cooled housing 401 and the cooling plate 200, the inventors have made the following improvements:

[0094] Combine Figure 4 and Figure 7 As shown, the air-cooling housing 401 includes a main body 440 and a cover 450. The main bodies 440 of the plurality of battery assemblies 10 are connected.

[0095] The main body 440 is provided with a through opening 441, and the opening 441 is used to allow the cooling plate 200 to pass through and enter the interior of the air-cooled shell 401. The cover 450 covers the opening 441. During the actual assembly process, the main body 440 and the cover 450 are first separated, and the opening 441 is exposed. At this time, the extension unit of the cooling plate 200 is passed through the opening 441 into the interior of the main body 440. At this time, the cooling plate 200 is provided with a plurality of through holes 230 that pass through in the thickness direction, and at least part of the structure of the through holes 230 extends to the opening 441. After the cooling plate 200 is installed in place, the cover 450 is covered on the opening 441 to prevent excessive leakage of air into the main body 440.

[0096] Furthermore, the main body 440 is provided with a positioning notch 442, which is located above the opening 441. The cover 450 is provided with a positioning protrusion 451, which enters the positioning notch 442. The cover 450 is also provided with a limiting protrusion 453, which enters the through-hole 230. This arrangement effectively limits the position of the cover 450 and the main body 440. In this case, the through-hole 230 not only serves to allow gas flow, but also serves to bend and absorb variations, and also serves to limit the position of the cover 450.

[0097] Further, such as Figure 7 As shown, the periphery of the cover 450 extends outward to form a widened portion 452. The width of the widened portion 452 is greater than the distance between adjacent through-holes 230. The widened portion 452 extends from the periphery of the cover 450 to below the cooling plate 200. Positioning screw holes 454 are provided in the portion of the widened portion 452 located below the cooling plate 200. The battery assembly 10 also includes a fastener 500, which enters the positioning screw hole 454 and is fixedly connected to the cooling plate 200 via threads. The fastener 500 also enters the through-hole 230.

[0098] In this arrangement, the width of the widened portion 452 is greater than the distance between adjacent through-holes 230, allowing the fastener 500 to be inserted and secured to the fastener 500 while also entering the through-hole 230. Furthermore, the wider widened portion 452 abuts against the cooling plate 200, effectively limiting its position. This arrangement achieves multiple positioning capabilities.

[0099] Further, such as Figure 6 As shown, the battery assembly 10 further includes a heat sink 600, which is disposed around the air cooling unit 222. In this embodiment, the heat sink 600 is attached to the air cooling unit 222. The heat sink 600 includes a plurality of heat dissipation plates 610 disposed at intervals.

[0100] like Figure 1 As shown, the planes on which the plurality of heat dissipation plates 610 are located are parallel to the second direction Y, and are spaced apart along the third direction L, which is perpendicular to the first direction X and the second direction Y.

[0101] In the above configuration, the wind at the outlet section 420 can flow along the second direction Y through the circumference of the heat dissipation plate body 610 , so that the radiator 600 can further improve the heat dissipation efficiency of the cooling plate 200 .

[0102] Continue as Figure 1As shown, at this time, the air outlet 4103 of the air-cooled shell 401 is located at the top end surface of the outlet section 420 away from the inlet section 410, and is located at the top end surface of the air outlet body 430, the air outlet 4103 has a plurality of air outlets 4103, and the plurality of air outlets 4103 are uniformly arranged on the top end surface along the third direction L. At least one fan 20 is fixed on each air outlet 4103.

[0103] In operation, the fan 20 is started, and the external air flows into the inlet section 410 and enters the outlet section 420, and flows upward along the second direction Y in the outlet section 420, and after flowing through the cooling plate 200 and the heat sink 600, it flows out through the air outlet 4103. The arrows can simply indicate the direction of air flow.

[0104] As shown, Figure 5 In other embodiments, the planes in which the plurality of heat sink plate bodies 610 are located are parallel to the first direction X and the third direction L, and are arranged at intervals along the second direction Y.

[0105] In the above arrangement, the air in the outlet section 420 can flow along the second direction Y, and also needs to flow horizontally along the third direction L to the side of the heat sink plate body 610, so that the heat sink 600 can further improve the heat dissipation efficiency of the cooling plate 200. The arrows can simply indicate the direction of air flow.

[0106] Continuing as shown, Figure 5 At this time, the air outlet 4103 of the air-cooled shell 401 is located at the top end surface of the outlet section 420 away from the inlet section 410, and the air outlet 4103 has a plurality of air outlets 4103, which are uniformly distributed on the top end surface and arranged at opposite ends along the third direction L. At least one fan 20 is fixed on each air outlet 4103.

[0107] In operation, the fan 20 is started, and the external air flows into the inlet section 410 and enters the two sides of the outlet section 420, and flows upward along the second direction Y in the two sides of the outlet section 420. In the process of flowing upward, it also flows horizontally along the third direction L to the side of the heat sink plate body of the heat sink 600. Finally, it flows out through the air outlets 4103 on the two sides. The arrows can simply indicate the direction of air flow.

[0108] Further, along the first direction X, the distance from the edge of the heat sink plate body 610 to the wall surface of the air-cooled shell 401 is greater than or equal to 1 mm and less than or equal to 10 cm. By limiting the maximum distance between the two, it is ensured that as much air as possible entering the inside of the air-cooled shell 401 contacts the heat sink plate body 610, so as to maximize the heat dissipation efficiency. By limiting the maximum distance between the two, the operation simplicity of the air-cooled shell 401, the cooling plate 200 and the heat sink 600 during installation is ensured.

[0109] It should be noted that the technical solutions or technical features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the accompanying drawings; all modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of this application shall be included in the scope of protection of this application.

Claims

1. A battery assembly, characterized in that: The battery assembly comprises: Battery cell pack; The cooling plate includes a fixed portion and an extension portion connected along a first direction, wherein the fixed portion is fixed below the battery cell group and the extension portion is away from the battery cell group; the extension portion includes an extension unit and an air cooling unit; the extension unit extends along the first direction, and the air cooling unit extends upward along a second direction, wherein the first direction is perpendicular to the second direction, and the second direction is parallel to the thickness direction of the battery cell group; An air cooling group includes an air cooling housing, the air cooling housing includes an air cooling inlet and an air cooling outlet; the air cooling outlet is used to fix a fan, the fan is used to drive air into the air cooling housing from the air cooling inlet and out of the air cooling housing from the air cooling outlet; the air cooling housing includes an inlet section and an outlet section; the air cooling inlet is opened at the inlet section; the air cooling outlet is opened at the outlet section; Wherein, the air cooling unit is arranged in the air cooling housing and is located in the outlet section; The extension portion is provided with a through hole penetrating along the thickness direction, the air cooling unit is provided with at least a portion of the through holes, and the air cooling unit is located in the air cooling housing; A cooling channel is provided inside the cooling plate, and the cooling channel is used for the flow of a phase-changing cooling medium for heat exchange; There are multiple through holes, and cooling channels are provided between adjacent through holes; The extension portion further includes a connecting unit, both ends of which are smoothly connected to the extension unit and the air cooling unit respectively; The connecting unit is provided with the through hole; The air-cooling housing further comprises a main body, and a through opening is formed on the main body, and the opening is used to allow the cooling plate to pass through and enter the interior of the air-cooling housing.

2. The battery assembly according to claim 1, wherein The air cooling group further includes an air guide plate; the air guide plate is arranged inside the air cooling shell and toward the air cooling inlet, and is used to control the opening of the air cooling inlet.

3. The battery assembly according to claim 2, wherein: The air cooling group further includes a controller and a refrigeration module; the refrigeration module is located outside the air cooling housing, and the cold air outlet of the refrigeration module is arranged toward the air cooling inlet; When the outside temperature is higher than the internal temperature of the air-cooled housing, the controller controls the refrigeration module to turn on.

4. The battery assembly according to claim 1, wherein The air-cooling housing further includes a cover body, and the cover body covers the opening.

5. The battery assembly according to claim 4, wherein: The main body is provided with a positioning notch, and the positioning notch is located above the opening; the cover is provided with a positioning protrusion, and the positioning protrusion enters the positioning notch; The cooling plate is provided with a plurality of through holes penetrating along the thickness direction, and at least a portion of the through holes extends to the opening; a limiting protrusion is provided on the cover body, and the limiting protrusion enters the through holes.

6. The battery assembly according to claim 5, wherein: The peripheral side of the cover body extends outward to form a widened portion, and the width of the widened portion is greater than the distance between adjacent through holes; The widened portion extends from the peripheral side of the cover to below the cooling plate; A positioning screw hole is provided on the portion of the widened portion located below the cooling plate; the battery assembly further comprises a fastener, which enters the positioning screw hole and is fixedly connected to the cooling plate; the fastener also enters the through hole.

7. The battery assembly according to claim 1, wherein: The battery assembly further includes a radiator, which is arranged on a peripheral side of the air cooling unit; The radiator comprises a plurality of heat dissipation plates arranged at intervals; The planes on which the multiple heat dissipation plates are located are parallel to the second direction, and are spaced apart along a third direction, and the third direction is perpendicular to the first direction and the second direction; or, the planes on which the multiple heat dissipation plates are located are parallel to the first direction, and are spaced apart along the second direction.

8. The battery assembly according to claim 7, wherein: When the planes on which the plurality of heat dissipation plates are located are parallel to the second direction and are spaced apart along the third direction, the air outlet of the air-cooling housing is located on the top surface of the outlet section away from the inlet section, and there are a plurality of air outlets, and the plurality of air outlets are evenly arranged on the top surface along the third direction; When the planes on which the multiple heat dissipation plates are located are parallel to the first direction and are spaced apart along the second direction, the air outlet of the air-cooled shell is located at the top end surface of the outlet section away from the inlet section. There are multiple air outlets, and the multiple air outlets are evenly distributed at both ends of the top end surface that are relatively arranged along the third direction.

9. The battery assembly according to claim 7, wherein: Along the first direction, the distance from the edge of the heat dissipation plate to the wall of the air-cooling housing is greater than or equal to 1 mm and less than or equal to 10 cm.

10. A battery device, characterized in that: The battery device comprises a plurality of battery assemblies according to any one of claims 1 to 9; the plurality of battery assemblies are fixedly arranged along the second direction; The battery cell group and the cooling plate in each battery assembly are fixed to form a functional module; the plurality of cooling plates are fixedly arranged along the second direction; The outlet sections of the air-cooling shells of the multiple battery assemblies are connected along the second direction.

11. The battery device according to claim 10, wherein: The outlet sections of the multiple air-cooling shells are connected to form an air outlet body; the battery device also includes a fan, which is fixed to the top of the air outlet body; Each of the air cooling groups includes at least one air guide plate; the air guide plate is arranged inside each of the air cooling shells and is arranged toward the air cooling inlet, and is used to control the opening of the air cooling inlet; Along the second direction, the inclination angles of the air guide plates in two adjacent air-cooling shells are different, so that the openings of the air-cooling inlets in the two adjacent air-cooling shells are different; the opening of the air-cooling inlet away from the top of the air outlet body is greater than the opening of the air-cooling inlet close to the top of the air outlet body, so that the air intake volume of the air-cooling inlet away from the top of the air outlet body is greater than the air intake volume of the air-cooling inlet close to the top of the air outlet body.

12. The battery device according to claim 10, wherein: The outlet section of the air-cooling housing extends along the second direction; the inlet section of the air-cooling housing extends along the first direction away from the battery cell group, and two adjacent inlet sections are parallel and spaced apart along the second direction.

13. The battery device according to claim 10, wherein: The air cooling unit of each cooling plate is provided with a through hole penetrating along the thickness direction, and the through holes are all located in the air cooling shell; The through holes on the air cooling unit that are adjacent to each other along the second direction have overlapping orthographic projections in the second direction.

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