Lower box body, battery and electric equipment

Abstract

The utility model discloses a lower box body, a battery and electric equipment, and relates to a battery technology. The lower box body comprises a heat exchange plate and a surrounding plate, the heat exchange plate and the surrounding plate jointly define a containing cavity, at least one heat exchange channel allowing heat exchange liquid to flow is formed in the heat exchange plate, and each heat exchange channel comprises a water inlet flow channel, a middle flow channel and a water outlet flow channel. And spoilers protruding out of the inner wall of the heat exchange runner are arranged in the middle runner and / or the water outlet runner. The heat exchange plate is integrated in the lower box body, so that the battery can be more compact compared with a battery box and a heat exchange assembly which are independently arranged. The spoilers are arranged in the middle flow channel and / or the water outlet flow channel, the convection intensity and the flow speed of the heat exchange liquid in the middle flow channel and / or the water outlet flow channel are improved, and therefore the problem that the cooling capacity is reduced due to temperature rising of the heat exchange liquid is solved. Therefore, the plurality of single batteries carried by the lower box body can be cooled more uniformly.

Description

Technical Field

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

[0002] At present, the energy density of energy storage battery packs is relatively high, and battery cells are often closely arranged in the battery packs, generating a large amount of heat, which is usually dissipated by heat exchange components. However, due to the unreasonable structure of the current heat exchange components, the heat dissipation effect of the battery is poor, and uneven heat dissipation is prone to occur. For example, the temperature of the heat exchange fluid upstream of the heat exchange channel is relatively low, and the corresponding battery cells are easy to dissipate heat, while the temperature of the heat exchange fluid in the middle and downstream of the heat exchange channel is relatively high, and its heat absorption capacity is limited, which easily leads to excessively high temperatures of the corresponding battery cells in the middle and downstream of the heat exchange channel. Utility Model Content

[0003] The purpose of the present application is to provide a lower box, a battery and an electrical device, wherein the lower box can dissipate heat more evenly for a plurality of battery cells carried thereon.

[0004] The embodiment of the present application is implemented as follows:

[0005] In a first aspect, the present application provides a lower box, comprising a heat exchange plate for supporting a battery cell and a surrounding plate arranged on the heat exchange plate, wherein the heat exchange plate and the surrounding plate together form a receiving cavity for receiving the battery cell, wherein the heat exchange plate is provided with at least one heat exchange channel for heat exchange fluid to flow, each of the heat exchange channels comprises a water inlet channel, an intermediate channel and a water outlet channel, wherein one end of the intermediate channel is connected to the water inlet channel and the other end is connected to the water outlet channel; a water inlet is provided on the water inlet channel, and a water outlet is provided on the water outlet channel;

[0006] Wherein, a spoiler protruding from the inner wall of the heat exchange channel is arranged in the intermediate flow channel and / or the water outlet flow channel.

[0007] In an optional embodiment, the water inlet channel, the intermediate channel and the water outlet channel all extend along a first direction, the water inlet channel, the intermediate channel and the water outlet channel are arranged along a second direction, and the spoiler is provided in the water outlet channel.

[0008] In an optional embodiment, the intermediate flow channel includes a plurality of sub-flow channels arranged along the second direction and connected in series at their ends, and the spoiler is disposed in at least two of the sub-flow channels close to the water outlet flow channel.

[0009] In an optional embodiment, the spoiler extends along the first direction and is spaced apart from inner walls at both ends of the heat exchange plate in the first direction.

[0010] In an optional embodiment, along the width direction of the spoiler, the spoiler extends to the inner walls of the intermediate flow channel and / or the water outlet flow channel respectively to divide the intermediate flow channel and / or the water outlet flow channel into at least two cavities, and the total cross-section of the at least two cavities is smaller than the cross-section of the heat exchange channel without the spoiler.

[0011] In an optional embodiment, the heat exchange plate includes 2N heat exchange channels arranged along the second direction, wherein N ≥ 1, and N is an integer;

[0012] A water inlet is provided at the end of the water inlet channel, the water inlet of the 2N-1th heat exchange channel is connected with the water inlet of the 2Nth heat exchange channel to form a diversion channel, and a water inlet hole connected to the diversion channel is opened on the heat exchange plate; a water outlet hole is provided at the end of each water outlet channel.

[0013] In an optional embodiment, the water outlet hole and the water inlet hole are both arranged at the same end of the heat exchange plate in the first direction.

[0014] In an optional embodiment, the lower box includes a water inlet pipe and a water outlet pipe, the water inlet pipe is connected to the water inlet hole, and the water outlet pipe is connected to the water outlet hole.

[0015] In a second aspect, the present application provides a battery, comprising a plurality of battery cells and a lower box body as described in any one of the first aspects above, wherein the battery cells are arranged on the heat exchange plate.

[0016] In a third aspect, the present application provides an electrical device, comprising the battery in the second aspect.

[0017] The beneficial effects of the embodiments of the present application are:

[0018] The lower box provided in the embodiment of the present application includes a heat exchange plate for supporting a battery cell and a surrounding plate arranged on the heat exchange plate. The heat exchange plate and the surrounding plate together form a receiving cavity for accommodating a battery cell. The heat exchange plate is provided with at least one heat exchange channel for the flow of heat exchange fluid. Each heat exchange channel includes an inlet channel, an intermediate channel and an outlet channel. One end of the intermediate channel is connected to the inlet channel, and the other end is connected to the outlet channel. The inlet channel is provided with a water inlet, and the outlet channel is provided with a water outlet. A spoiler protruding from the inner wall of the heat exchange channel is provided in the intermediate channel and / or the outlet channel. The lower box of the present application integrates the heat exchange plate, so compared with separately providing a battery box and a heat exchange component, the battery can be made more compact. Since the temperature of the heat exchange fluid flowing downstream is higher than that of the heat exchange fluid upstream, the heat exchange plate of the present application increases the convection intensity and flow rate of the heat exchange fluid in the middle flow channel and / or the water outlet flow channel by arranging spoilers in the middle flow channel and / or the water outlet flow channel, so that the heat exchange capacity of the heat exchange fluid in the middle flow channel and / or the water outlet flow channel is improved, thereby alleviating the problem of decreased cooling capacity due to the increase in the temperature of the heat exchange fluid. Therefore, the multiple battery cells carried by the lower box can dissipate heat more evenly, thereby improving the consistency of the battery cells and facilitating the life of the battery.

[0019] The battery provided in the embodiment of the present application includes a battery cell and the above-mentioned lower box, and the battery cell is arranged on the heat exchange plate. Each battery cell of the battery can dissipate heat more evenly, so the consistency of the battery cell is good, the battery life is longer; and the battery structure is more compact.

[0020] The electrical equipment provided in the embodiment of the present application includes the above-mentioned battery, and therefore also has the above-mentioned corresponding beneficial effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 This is a schematic diagram of a lower box in an embodiment of the present application;

[0023] Figure 2 This is an exploded view of the lower box in one embodiment of the present application;

[0024] Figure 3 This is a schematic diagram of the distribution of heat exchange channels in one embodiment of the present application;

[0025] Figure 4 for Figure 1Cross-sectional view of the middle and lower box along direction A.

[0026] Icon: 010-lower box body; 100-heat exchange plate; 101-upper plate body; 102-lower plate body; 103-water inlet hole; 104-water outlet hole; 110-channel wall plate; 120-water inlet channel; 130-middle channel; 131-sub-channel; 140-water outlet channel; 150-spoiler; 160-diverter channel; 170-plug; 200-side plate; 210-end plate; 211-first through hole; 212-second through hole; 300-water inlet pipe; 400-water outlet pipe. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0029] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0030] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0031] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0032] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0033] At present, the battery cells in the energy storage battery pack are closely arranged and have a large heat generation, so heat exchange components are often used for heat dissipation. However, the current heat exchange components are not structurally reasonable, resulting in poor heat dissipation effect of the battery, and uneven heat dissipation problems are prone to occur. For example, the temperature of the heat exchange fluid upstream of the heat exchange channel is low, and the corresponding battery cells are easy to dissipate heat. However, the temperature of the heat exchange fluid in the middle and downstream of the heat exchange channel is higher, and the flow pattern of the middle and downstream heat exchange channels is consistent with the flow pattern of the upstream heat exchange channel, resulting in the limited heat absorption capacity of the downstream heat exchange channel, which easily leads to the corresponding battery cell temperature in the middle and downstream of the heat exchange channel being too high. The temperature uniformity of the battery cells in the entire battery pack is poor, and there will be differences in service life, which is not conducive to the performance and life of the battery pack. In addition, since it is necessary to set up a heat exchange component specifically in the battery box, the integration is poor, resulting in the battery pack being not compact enough.

[0034] In order to improve the deficiencies in the above-mentioned related technologies, the embodiment of the present application provides a lower box, whose upstream flow channel and the mid- and downstream flow channels adopt different designs, so that the lower box can make the battery cells in the battery pack dissipate heat relatively evenly, which is conducive to improving the performance of the battery pack and has high integration. The embodiment of the present application also provides a battery and an electrical device, the battery includes the above-mentioned lower box, and the electrical device includes the above-mentioned battery.

[0035] Figure 1 This is a schematic diagram of a lower box 010 in one embodiment of the present application; Figure 2 This is an exploded view of the lower box 010 in one embodiment of the present application; Figure 3 This is a schematic diagram of the distribution of heat exchange channels in one embodiment of the present application; Figure 4 for Figure 1 The cross-sectional view of the middle and lower box body 010 along the direction A. Figures 1 to 4As shown, the lower box body 010 provided in the embodiment of the present application includes a heat exchange plate 100 and a surrounding plate arranged on the heat exchange plate 100. The heat exchange plate 100 and the surrounding plate together enclose a receiving cavity for accommodating battery cells. After the battery cells are arranged in the receiving cavity, they can be limited by the surrounding plate so that the battery module remains as a whole. The heat exchange plate 100 is used to support the battery cells and dissipate heat from the bottom of the battery cells. At least one heat exchange channel is arranged in the heat exchange plate 100. The heat exchange channel can be used for heat exchange fluid to flow. After the heat exchange fluid flows into the heat exchange channel, it absorbs the heat emitted by the battery cells and then flows out from the heat exchange channel, thereby taking the heat out of the battery.

[0036] In this embodiment, the heat exchange plate 100 includes an upper plate body 101 and a lower plate body 102 which are arranged in parallel and spaced apart in the thickness direction thereof, and a heat exchange channel is formed between the upper plate body 101 and the lower plate body 102, and the upper plate body 101 is used to support the battery cell. In order to increase the heat dissipation capacity of the battery cell, the upper plate body 101 can be made of metal material or alloy, such as aluminum alloy; similarly, the lower plate body 102 can also be made of metal material or alloy, and connected to the upper plate body 101 by welding. Two openings connecting the heat exchange channel are formed at both ends of the heat exchange plate 100 in the first direction, and the heat exchange plate 100 also includes two plugs 170, which block the openings to ensure the sealing of the heat exchange channel.

[0037] In the embodiment of the present application, each heat exchange channel includes an inlet channel 120, an intermediate channel 130 and an outlet channel 140. One end of the intermediate channel 130 is connected to the inlet channel 120, and the other end is connected to the outlet channel 140. The inlet channel 120 is provided with an inlet for the heat exchange fluid to flow in, and the outlet channel 140 is provided with an outlet for the heat exchange fluid to flow out. A spoiler 150 protruding from the inner wall of the heat exchange channel is provided in the intermediate channel 130 and / or the outlet channel 140.

[0038] Since the spoiler 150 is arranged in the middle channel 130 and / or the outlet channel 140, when the heat exchange liquid flows through the middle channel 130 and / or the outlet channel 140, the spoiler 150 can disturb the heat exchange liquid, thereby increasing the convection intensity and flow rate of the heat exchange liquid in the middle channel 130 and / or the outlet channel 140, so that the heat exchange capacity of the heat exchange liquid in the middle channel 130 and / or the outlet channel 140 is improved, thereby alleviating the problem of decreased cooling capacity due to the increase in the temperature of the heat exchange liquid. Therefore, the multiple battery cells carried by the lower box 010 can dissipate heat more evenly, thereby improving the consistency of the battery cells and facilitating the life of the battery.

[0039] Figure 3In the embodiment of the present application, the water inlet channel 120, the intermediate channel 130 and the water outlet channel 140 all extend along the first direction, the water inlet channel 120, the intermediate channel 130 and the water outlet channel 140 are arranged along the second direction, and a spoiler 150 is provided in the water outlet channel 140.

[0040] Furthermore, the middle flow channel 130 includes a plurality of sub-flow channels 131 arranged along the second direction and connected in series at their ends. In the second direction, spoilers 150 are disposed in at least two sub-flow channels 131 closest to the outlet flow channel 140 .

[0041] from Figure 3 It can be seen that the water inlet channel 120, the multiple sub-channels 131 of the middle channel 130 and the water outlet channel 140 are parallel to each other, each channel extends along the first direction and is arranged along the second direction, and the ends of the multiple channels are connected in sequence to form a tortuously extending heat exchange channel.

[0042] In this embodiment, the middle flow channel 130 includes four sub-flow channels 131, two sub-flow channels 131 near the outlet flow channel 140 are provided with spoilers 150, and two sub-flow channels 131 near the inlet flow channel 120 are not provided with spoilers 150. In other optional embodiments, the position of the spoiler 150 can also be adjusted, for example, no spoiler 150 is provided in the middle flow channel 130 or spoilers 150 are provided in all sub-flow channels 131; or, no spoiler 150 is provided in the outlet flow channel 140, and spoilers 150 are provided only in the middle flow channel 130 (because the outlet flow channel 140 corresponds to the battery cell near the edge, which itself may be easy to dissipate heat).

[0043] In this embodiment, the spoiler 150 extends along the first direction and is spaced apart from the inner walls (specifically formed by two plugs 170 ) at both ends of the heat exchange plate 100 in the first direction.

[0044] Optionally, the heat exchange plate 100 includes 2N heat exchange channels arranged along the second direction, wherein N≥1, and N is an integer. A water inlet is provided at the end of the water inlet channel 120, and the water inlet of the 2N-1 heat exchange channel is connected to the water inlet of the 2N heat exchange channel to form a diversion channel 160. The heat exchange plate 100 is provided with a water inlet hole 103 connected to the diversion channel 160. A water outlet hole 104 is provided at the end of each water outlet channel 140.

[0045] In this embodiment, N is equal to 1, that is, two heat exchange channels are provided in the heat exchange plate 100, and the two heat exchange channels are arranged in the second direction. Figure 3As shown, the two heat exchange channels are respectively distributed in the left and right halves of the heat exchange plate 100, respectively cooling approximately half of the area of ​​the heat exchange plate 100. In other optional embodiments, the heat exchange plate 100 may be provided with more groups of heat exchange channels, and the multiple groups of heat exchange channels are arranged in the second direction; each group of heat exchange channels includes two heat exchange channels, and both can be arranged according to Figure 3 Arranged in the manner shown.

[0046] In this embodiment, the water inlet channel 120 of the heat exchange channel is closer to the middle of the heat exchange plate 100 in the second direction than the water outlet channel 140. The heat exchange fluids of the two heat exchange channels flow into the heat exchange channel from a position close to the middle of the heat exchange plate 100 (particularly the middle in the second direction), and then flow in a winding manner toward the two side edges of the heat exchange plate 100 spaced apart in the second direction.

[0047] In this embodiment, two adjacent flow channels (including adjacent sub-flow channels 131) are separated by the flow channel wall plate 110. The spoiler 150 extends to the inner wall of the intermediate flow channel 130 and / or the outlet flow channel 140 respectively to divide one intermediate flow channel 130 and / or the outlet flow channel 140 into at least two cavities, and the total cross-section of the multiple cavities is smaller than the cross-section of the heat exchange channel without the spoiler 150. In this embodiment, the width of the outlet channel 140 and the single sub-channel 131 of the middle channel 130 is consistent with the width of the inlet channel 120, but because the spoiler 150 is provided therein, the channel cross-section of the outlet channel 140 and some sub-channels 131 of the middle channel 130 is smaller than the channel cross-section of the inlet channel 120, which makes the overall flow velocity of the heat exchange fluid in the outlet channel 140 and the sub-channel 131 provided with the spoiler 150 greater than the overall flow velocity in the inlet channel 120.

[0048] In this embodiment, a spoiler 150 is provided in each of the partial sub-channels 131 of the middle channel 130 and the outlet channel 140, so the channel is divided into two cavities by the spoiler 150. Along the width direction of the spoiler 150, the spoiler 150 is connected to the upper plate body 101 and the lower plate body 102, and divides the outlet channel 140 and the partial sub-channels 131 of the middle channel 130 into two cavities of equal width, and the two cavities are spaced apart in the second direction. In other optional embodiments, more than two spoilers 150 may be provided in the outlet channel 140 or the sub-channel 131.

[0049] In other optional embodiments, the spoiler 150 may also be connected to the two channel wall plates 110 forming the water outlet channel 140 and / or the sub-channel 131 to separate the water outlet channel 140 and / or the sub-channel 131 into two cavities spaced apart along the thickness direction of the heat exchange plate 100.

[0050] In this embodiment, in order to ensure uniform heat dissipation of the battery cells, the two heat exchange channels are symmetrically arranged. Figure 3 In the embodiment, the two heat exchange channels are mirror-set in the left and right directions.

[0051] Furthermore, the heat exchange plate 100 of this embodiment is provided with a water inlet hole 103 and two water outlet holes 104. The two heat exchange channels share one water inlet hole 103. The two water outlet holes 104 are respectively connected to the downstream ends of the two heat exchange channels (i.e., the ends of the water outlet flow channel 140). In this embodiment, the water outlet hole 104 and the water inlet hole 103 are both provided at the same end of the heat exchange plate 100 in the first direction (i.e., Figure 3 ). Figure 3 As shown, Figure 3 The dotted circle in the middle of the lower middle position corresponds to the position of the water inlet 103, and the two dotted circles on the left and right sides of the lower position correspond to the positions of the two water outlets 104. By providing a water inlet 103 to supply water to two heat exchange channels, the complexity of the pipeline can be reduced, which is conducive to reducing the volume of the equipment.

[0052] In this embodiment, the lower box body 010 includes a water inlet pipeline 300 and a water outlet pipeline 400 . The water inlet pipeline 300 is connected to the water inlet hole 103 , and the water outlet pipeline 400 is connected to two water outlet holes 104 .

[0053] In this embodiment, the water inlet hole 103 and the water outlet hole 104 are located on the inner side of the accommodating cavity, and are specifically opened on the upper plate body 101. Optionally, the enclosure includes two end plates 210 spaced apart in the first direction and two side plates 200 spaced apart in the second direction. One end of the water inlet pipeline 300 of the lower box body 010 is connected to the water inlet hole 103; the other end of the water inlet pipeline 300 passes through the end plate 210, and this end is used to be connected to the external heat exchange liquid supply end. One end of the water outlet pipeline 400 is connected to the water outlet hole 104, and the other end of the water outlet pipeline 400 passes through the end plate 210. In this embodiment, a first through hole 211 and a second through hole 212 are provided on one of the end plates 210, one end of the water inlet pipeline 300 passes through the first through hole 211, and the water outlet pipeline 400 passes through the second through hole 212.

[0054] Optionally, one end of the water inlet pipe 300 and the water outlet pipe 400 located outside the accommodating cavity can be connected to a water tank through a pipeline. The water tank is used to store heat exchange fluid and transport the heat exchange fluid into the heat exchange channel, so that the heat exchange fluid can pass through the water tank, the water inlet pipe 300, the heat exchange channel, the water outlet pipe 400 and then return to the water tank in sequence, thereby realizing circulation.

[0055] In order to achieve a better cooling effect, a heat exchange channel may be provided in the side plate 200 for the heat exchange fluid to flow. The weight of the lower box 010 may also be reduced by providing the side plate 200 with a hollow structure.

[0056] The embodiment of the present application further provides a battery, comprising a plurality of battery cells and the lower box body 010 provided in the above embodiment, wherein the battery cells are arranged on the heat exchange plate 100. The battery cells may be square cells, cylindrical cells, and the like.

[0057] Specifically, the battery cells can be arranged in an array on the surface of the upper plate 101, and a thermal conductive adhesive can be provided between the upper plate 101 and the battery cells to eliminate air gaps, enhance heat transfer, and play a certain fixing role. It can be seen that the lower box 010 provided in the embodiment of the present application can be used as the lower box 010 of the battery pack, which is used to accommodate and protect the battery cells and also to cool the battery cells.

[0058] The embodiment of the present application also provides an electric device, including the above-mentioned battery. The electric device may be an electric car or other device that needs to be driven by electricity.

[0059] In summary, the lower box 010 provided in the embodiment of the present application includes a heat exchange plate 100 for supporting a battery cell and a surrounding plate arranged on the heat exchange plate 100. The heat exchange plate 100 and the surrounding plate together form a receiving cavity for accommodating a battery cell. The heat exchange plate 100 is provided with at least one heat exchange channel for the flow of heat exchange fluid. Each heat exchange channel includes an inlet channel 120, an intermediate channel 130 and an outlet channel 140. One end of the intermediate channel 130 is connected to the inlet channel 120, and the other end is connected to the outlet channel 140. The inlet channel 120 is provided with a water inlet, and the outlet channel 140 is provided with a water outlet. A spoiler 150 protruding from the inner wall of the heat exchange channel is provided in the intermediate channel 130 and / or the outlet channel 140. The lower box 010 of the present application integrates the heat exchange plate 100, so compared with separately providing a battery box and a heat exchange component, the battery can be made more compact. Since the temperature of the heat exchange liquid flowing downstream is higher than that of the heat exchange liquid upstream, the heat exchange plate 100 of the present application increases the convection intensity and flow rate of the heat exchange liquid in the middle flow channel 130 and / or the water outlet flow channel 140 by setting a spoiler 150 in the middle flow channel 130 and / or the water outlet flow channel 140, so that the heat exchange capacity of the heat exchange liquid in the middle flow channel 130 and / or the water outlet flow channel 140 is improved, thereby alleviating the problem of decreased cooling capacity due to the increase in the temperature of the heat exchange liquid. Therefore, the multiple battery cells carried by the lower box 010 can dissipate heat more evenly, thereby improving the consistency of the battery cells and facilitating the life of the battery.

[0060] The battery provided in the embodiment of the present application includes a battery cell and the above-mentioned lower box 010, and the battery cell is arranged on the heat exchange plate 100. Each battery cell of the battery can dissipate heat more evenly, so the consistency of the battery cell is good, the battery life is longer, and the battery structure is more compact.

[0061] The electrical equipment provided in the embodiment of the present application includes the above-mentioned battery, and therefore also has the above-mentioned corresponding beneficial effects.

[0062] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A lower box, characterized in that: The invention comprises a heat exchange plate (100) for supporting a battery cell and a surrounding plate arranged on the heat exchange plate (100); the heat exchange plate (100) and the surrounding plate together form a receiving cavity for receiving the battery cell; the heat exchange plate (100) is provided with at least one heat exchange channel for heat exchange fluid to flow; each heat exchange channel comprises a water inlet channel (120), an intermediate channel (130) and a water outlet channel (140); one end of the intermediate channel (130) is connected to the water inlet channel (120), and the other end is connected to the water outlet channel (140); the water inlet channel (120) is provided with a water inlet, and the water outlet channel (140) is provided with a water outlet; Wherein, a spoiler (150) protruding from the inner wall of the heat exchange channel is provided in the intermediate flow channel (130) and / or the water outlet flow channel (140).

2. The lower box according to claim 1, characterized in that: The water inlet channel (120), the intermediate channel (130) and the water outlet channel (140) all extend along a first direction, the water inlet channel (120), the intermediate channel (130) and the water outlet channel (140) are arranged along a second direction, and the spoiler (150) is provided in the water outlet channel (140).

3. The lower box according to claim 2, characterized in that: The intermediate flow channel (130) comprises a plurality of sub-flow channels (131) arranged along the second direction and connected in series at their ends, and the spoiler (150) is arranged in at least two of the sub-flow channels (131) close to the water outlet flow channel (140).

4. The lower box according to claim 2 or 3, characterized in that: The spoiler (150) extends along the first direction and is spaced apart from the inner walls of the heat exchange plate (100) at both ends in the first direction.

5. The lower box according to claim 4, characterized in that: Along the width direction of the spoiler (150), the spoiler (150) extends to the inner wall of the intermediate flow channel (130) and / or the water outlet flow channel (140) respectively, so as to divide the intermediate flow channel (130) and / or the water outlet flow channel (140) into at least two cavities, and the total cross-section of the at least two cavities is smaller than the cross-section of the heat exchange channel without the spoiler (150).

6. The lower box according to claim 2, characterized in that: The heat exchange plate (100) comprises 2N heat exchange channels arranged along the second direction, wherein N≥1, and N is an integer; A water inlet is provided at the end of the water inlet channel (120); the water inlet of the 2N-1th heat exchange channel and the water inlet of the 2Nth heat exchange channel are connected to each other to form a branch channel (160); a water inlet hole (103) connected to the branch channel (160) is opened on the heat exchange plate (100); and a water outlet hole (104) is provided at the end of each water outlet channel (140).

7. The lower box according to claim 6, characterized in that: The water outlet hole (104) and the water inlet hole (103) are both arranged at the same end of the heat exchange plate (100) in the first direction.

8. The lower box according to claim 7, characterized in that: The lower box (010) comprises a water inlet pipeline (300) and a water outlet pipeline (400), wherein the water inlet pipeline (300) is connected to the water inlet hole (103), and the water outlet pipeline (400) is connected to the water outlet hole (104).

9. A battery, characterized in that: It comprises a plurality of battery cells and a lower box (010) according to any one of claims 1 to 8, wherein the battery cells are arranged on the heat exchange plate (100).

10. An electrical device, characterized in that: A battery comprising the battery of claim 9.

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