CN222463034U - Lower box, battery and electric equipment - Google Patents

Abstract

The present application discloses a lower box, a battery and an electrical device, and relates to battery technology. The lower box includes a heat exchange plate and a surrounding plate, and the heat exchange plate and the surrounding plate together form a receiving chamber. The heat exchange plate is provided with at least one heat exchange channel for the flow of heat exchange fluid, and each heat exchange channel includes an inlet channel, an intermediate channel and an outlet channel. 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 the battery can be made more compact compared to separately arranging the battery box and the heat exchange assembly. By arranging a spoiler in the intermediate channel and/or the outlet channel, the convection intensity and flow rate of the heat exchange fluid in the intermediate channel and/or the outlet channel are increased, 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.

Description

Lower box, battery and electric equipment

Technical Field

The application relates to the technical field of batteries, in particular to a lower box body and a battery.

Background

The energy density of the existing energy storage battery pack is large, battery monomers are often closely arranged in the battery pack, the heating value is large, and heat dissipation is usually carried out by adopting a heat exchange assembly. However, the conventional heat exchange assembly is not reasonable enough in structure, so that the battery has poor heat dissipation effect, and the problem of uneven heat dissipation is easy to occur. For example, the temperature of the heat exchange liquid at the upstream of the heat exchange channel is low, the corresponding battery cells are easy to dissipate heat, and the temperature of the heat exchange liquid at the downstream of the heat exchange channel is high, so that the heat absorption capacity is limited, and the temperature of the corresponding battery cells at the downstream of the heat exchange channel is easy to be overhigh.

Disclosure of utility model

The application aims to provide a lower box body, a battery and electric equipment, wherein the lower box body can more uniformly dissipate heat of a plurality of battery monomers carried by the lower box body.

Embodiments of the present application are implemented as follows:

The application provides a lower box body, which comprises a heat exchange plate for supporting a battery monomer and a coaming plate arranged on the heat exchange plate, wherein the heat exchange plate and the coaming plate jointly enclose a containing cavity for containing the battery monomer, at least one heat exchange channel for flowing heat exchange liquid is arranged in the heat exchange plate, each heat exchange channel comprises a water inlet channel, a middle channel and a water outlet channel, one end of the middle channel is communicated with the water inlet channel, and the other end of the middle channel is communicated with the water outlet channel;

And a spoiler protruding out of the inner wall of the heat exchange channel is arranged in the middle flow channel and/or the water outlet flow channel.

In an alternative embodiment, the water inlet flow channel, the middle flow channel and the water outlet flow channel all extend along a first direction, the water inlet flow channel, the middle flow channel and the water outlet flow channel are arranged along a second direction, and the spoiler is arranged in the water outlet flow channel.

In an alternative embodiment, the middle runner includes a plurality of sub runners arranged along the second direction and having ends connected in series, and the spoiler is disposed in at least two sub runners adjacent to the water outlet runner.

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

In an alternative embodiment, along the width direction of the spoiler, the spoiler extends onto the inner wall of the intermediate runner and/or the water outlet runner respectively so as to divide one intermediate runner and/or the water outlet runner 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.

In an alternative embodiment, the heat exchange plate comprises 2N heat exchange channels arranged along the second direction, wherein N is more than or equal to 1, and N is an integer;

The end part of the water inlet flow channel is provided with a water inlet, the water inlet of the 2N-1 th heat exchange channel is mutually communicated with the water inlet of the 2N-th heat exchange channel to form a split flow channel, the heat exchange plate is provided with water inlet holes communicated with the split flow channel, and the end part of each water outlet flow channel is provided with a water outlet hole.

In an alternative embodiment, the water outlet and the water inlet are both arranged at the same end of the heat exchange plate in the first direction.

In an alternative embodiment, the lower case includes a water inlet pipe connected to the water inlet hole and a water outlet pipe connected to the water outlet hole.

In a second aspect, the present application provides a battery, including a plurality of battery cells and the lower case of any one of the first aspects, where the battery cells are disposed on the heat exchange plate.

In a third aspect, the present application provides a powered device, including the battery in the second aspect.

The embodiment of the application has the beneficial effects that:

The lower box body comprises a heat exchange plate for supporting a battery monomer and a coaming plate arranged on the heat exchange plate, wherein a containing cavity for containing the battery monomer is formed by the heat exchange plate and the coaming plate, at least one heat exchange channel for heat exchange liquid to flow is arranged in the heat exchange plate, each heat exchange channel comprises a water inlet channel, a middle channel and a water outlet channel, one end of the middle channel is communicated with the water inlet channel, the other end of the middle channel is communicated with the water outlet channel, a water inlet is arranged on the water inlet channel, a water outlet is arranged on the water outlet channel, and a spoiler protruding out of the inner wall of the heat exchange channel is arranged in the middle channel and/or the water outlet channel. The lower case of the present application integrates the heat exchange plate, so that the battery can be more compact than if the battery case and the heat exchange assembly are separately provided. Compared with the upstream heat exchange liquid, the temperature of the heat exchange liquid flowing to the downstream heat exchange plate is higher, and the heat exchange plate improves the convection intensity and the flow velocity of the heat exchange liquid in the middle flow channel and/or the water outlet flow channel by arranging the spoiler in the middle flow channel and/or the water outlet flow channel, so that the heat exchange capacity of the heat exchange liquid in the middle flow channel and/or the water outlet flow channel is improved, and the problem of the reduction of the cooling capacity caused by the rise of the temperature of the heat exchange liquid is solved. Therefore, a plurality of battery units borne by the lower box body can dissipate heat more uniformly, so that the consistency of the battery units is improved, and the service life of the battery is prolonged.

The battery provided by the embodiment of the application comprises the battery monomer and the lower box body, wherein the battery monomer is arranged on the heat exchange plate. The battery unit of the battery can dissipate heat more uniformly, so that the consistency of the battery unit is good, the service life of the battery is longer, and the structure of the battery is more compact.

The electric equipment provided by the embodiment of the application comprises the battery, so that the electric equipment also has the corresponding beneficial effects.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a lower case according to an embodiment of the present application;

FIG. 2 is an exploded view of a lower case according to an embodiment of the present application;

FIG. 3 is a schematic diagram showing the distribution of heat exchange channels according to an embodiment of the present application;

Fig. 4 is a cross-sectional view of the lower case of fig. 1 taken along the direction a.

The icons comprise 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-runner wall plate, 120-water inlet runner, 130-middle runner, 131-sub runner, 140-water outlet runner, 150-spoiler, 160-diversion runner, 170-plug, 200-side plate, 210-end plate, 211-first through hole, 212-second through hole, 300-water inlet pipeline and 400-water outlet pipeline.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of 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, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. The components of the embodiments of the present application generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the application, as presented in the figures, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

It should be noted that like reference numerals and letters refer to like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal," "vertical," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, or may be directly connected, or may be indirectly connected through an intermediate medium, or may be in communication with the inside of two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.

The battery monomers in the existing energy storage battery pack are closely arranged and have larger heating value, so that heat dissipation is often carried out by adopting a heat exchange assembly. However, the conventional heat exchange assembly is not reasonable enough in structure, so that the battery has poor heat dissipation effect, and the problem of uneven heat dissipation is easy to occur. For example, the temperature of the heat exchange liquid at the upstream of the heat exchange channel is low, and the corresponding battery monomer is easy to dissipate heat. The temperature of the heat exchange liquid in the heat exchange channel and the downstream heat exchange liquid in the heat exchange channel is higher, and the flow modes of the heat exchange channel in the middle and the downstream are consistent with the flow modes of the heat exchange channel in the upstream, so that the heat absorption capacity of the heat exchange channel in the downstream is limited, and the temperature of the corresponding battery monomer in the heat exchange channel and the downstream is easy to be overhigh. The temperature uniformity of the battery cells in the whole battery pack is poor, and the service lives of the battery cells are different, which is detrimental to the performance and the service lives of the battery pack. In addition, the heat exchange assembly is required to be specially arranged in the battery box, so that the integration is poor, and the battery pack is not compact enough.

In order to improve the shortcomings in the related art, the embodiment of the application provides a lower box body, wherein the upstream flow channel and the middle and downstream flow channels of the lower box body are designed differently, so that the lower box body can enable battery monomers in a battery pack to dissipate heat relatively uniformly, the performance of the battery pack is improved, and meanwhile, the lower box body has higher integration. The embodiment of the application also provides a battery and electric equipment, wherein the battery comprises the lower box body, and the electric equipment comprises the battery.

Fig. 1 is a schematic view of a lower case 010 according to an embodiment of the present application, fig. 2 is an exploded view of the lower case 010 according to an embodiment of the present application, fig. 3 is a schematic view of distribution of heat exchanging channels according to an embodiment of the present application, and fig. 4 is a sectional view of the lower case 010 according to a direction of fig. 1. As shown in fig. 1 to 4, the lower case 010 provided in the embodiment of the present application includes a heat exchange plate 100 and a coaming plate provided to the heat exchange plate 100. The heat exchange plate 100 and the coaming together define a receiving chamber for receiving the battery cells. When the battery cells are arranged in the accommodating cavity, the battery cells can be limited by the coaming, so that the battery module is kept as a whole. The heat exchange plate 100 is used for supporting the battery monomer and radiating the bottom of the battery monomer, at least one heat exchange channel is arranged in the heat exchange plate 100, heat exchange liquid can flow through the heat exchange channel, and after the heat exchange liquid flows into the heat exchange channel, the heat emitted by the battery monomer is absorbed and flows out of the heat exchange channel, so that the heat is carried out of the battery.

In this embodiment, the heat exchange plate 100 includes an upper plate body 101 and a lower plate body 102 disposed in parallel at intervals in a thickness direction thereof, and heat exchange channels are formed between the upper plate body 101 and the lower plate body 102, the upper plate body 101 being for supporting the battery cells. In order to increase the heat dissipation capability of the battery cells, the upper plate 101 may be made of metal or alloy, such as aluminum alloy, and the lower plate 102 may be made of metal or alloy and connected to the upper plate 101 by welding. Two openings for communicating heat exchange channels are formed at two ends of the heat exchange plate 100 in the first direction, the heat exchange plate 100 further comprises two plugs 170, and the plugs 170 are used for plugging the openings, so that the tightness of the heat exchange channels is ensured.

In the embodiment of the present application, each heat exchange channel includes a water inlet channel 120, an intermediate channel 130 and a water outlet channel 140, wherein one end of the intermediate channel 130 is communicated with the water inlet channel 120, and the other end is communicated with the water outlet channel 140. The water inlet channel 120 is provided with a water inlet for heat exchange liquid to flow in, and the water outlet channel 140 is provided with a water outlet for heat exchange liquid to flow out. Wherein, the middle flow channel 130 and/or the water outlet flow channel 140 are provided with a spoiler 150 protruding from the inner wall of the heat exchange channel.

Because the spoiler 150 is disposed in the middle flow channel 130 and/or the water outlet flow channel 140, when the heat exchange liquid flows through the middle flow channel 130 and/or the water outlet flow channel 140, the spoiler 150 can play a role in spoiler the heat exchange liquid, so as to improve the convection intensity and flow velocity of the heat exchange liquid in the middle flow channel 130 and/or the water outlet flow channel 140, and improve the heat exchange capability of the heat exchange liquid in the middle flow channel 130 and/or the water outlet flow channel 140, thereby alleviating the problem of the reduction of cooling capability caused by the temperature rise of the heat exchange liquid. Therefore, a plurality of battery units borne by the lower box 010 can be enabled to dissipate heat more uniformly, and consistency of the battery units is improved, and service life of the battery is prolonged.

In fig. 3, the straight arrows in the flow channels represent the flow direction of the heat exchange liquid in the flow channels. In the embodiment of the present application, the water inlet channel 120, the middle channel 130 and the water outlet channel 140 all extend along the first direction, the water inlet channel 120, the middle channel 130 and the water outlet channel 140 are arranged along the second direction, and the spoiler 150 is disposed in the water outlet channel 140.

Further, the middle flow channel 130 includes a plurality of sub flow channels 131 arranged along the second direction and having ends connected in series, and in the second direction, a spoiler 150 is disposed in at least two sub flow channels 131 closest to the water outlet flow channel 140.

As can be seen from fig. 3, the water inlet flow channel 120, the plurality of sub-flow channels 131 of the intermediate flow channel 130 and the water outlet flow channel 140 are parallel to each other, each flow channel extends along the first direction and is arranged along the second direction, and the ends of the plurality of flow channels are sequentially communicated to form a meandering heat exchange channel.

In the present embodiment, the middle flow channel 130 includes four sub flow channels 131, the two sub flow channels 131 close to the water outlet flow channel 140 are provided with spoilers 150, and the two sub flow channels 131 close to the water inlet flow channel 120 are not provided with spoilers 150. In alternative embodiments, the position of the spoiler 150 may be adjusted, for example, the spoiler 150 is not disposed in the middle flow channel 130 at all or all the sub flow channels 131 are disposed with the spoiler 150, or the spoiler 150 is not disposed in the outlet flow channel 140, and the spoiler 150 is disposed in the middle flow channel 130 only (because the outlet flow channel 140 corresponds to the battery cell near the edge, which may be prone to heat dissipation).

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

Optionally, the heat exchange plate 100 includes 2N heat exchange channels arranged along the second direction, where N is greater than or equal to 1, and N is an integer. The end of the water inlet channel 120 is provided with a water inlet, and the water inlet of the 2N-1 th heat exchange channel is mutually communicated with the water inlet of the 2N-th heat exchange channel to form a diversion channel 160. The heat exchange plate 100 is provided with a water inlet 103 communicated with the flow diversion channel 160. The end of each water outlet channel 140 is provided with a water outlet hole 104.

In this embodiment, N is equal to 1, i.e. two heat exchange channels are provided in the heat exchange plate 100, the two heat exchange channels being arranged in the second direction. As shown in fig. 3, two heat exchange channels are respectively distributed in the left and right half portions of the heat exchange plate 100, and cool about half area of the heat exchange plate 100, respectively. In alternative further embodiments, the heat exchanger plate 100 may be provided with further groups of heat exchanger channels, the groups of heat exchanger channels being arranged in the second direction, each group comprising two heat exchanger channels and each group being arranged in the manner shown in fig. 3.

In the present 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 liquid of both heat exchange channels flows into the heat exchange channels from a position near the middle of the heat exchange plate 100 (particularly, the middle in the second direction), and then flows in a serpentine shape to both sides of the heat exchange plate 100 spaced in the second direction.

In this embodiment, two adjacent channels (including adjacent sub-channels 131) are separated by a channel wall 110. The spoilers 150 extend to the inner walls of the intermediate flow channels 130 and/or the water outlet flow channels 140 respectively to divide one intermediate flow channel 130 and/or the water outlet flow channels 140 into at least two cavities, and the total cross section of the cavities is smaller than the cross section of the heat exchange channel without the spoilers 150. In the present embodiment, the widths of the individual sub-channels 131 of the outlet channel 140 and the intermediate channel 130 are identical to the width of the inlet channel 120, but because the spoiler 150 is disposed therein, the flow cross-section of the part of the sub-channels 131 of the outlet channel 140 and the intermediate channel 130 is smaller than that of the inlet channel 120, so that the overall flow velocity of the heat exchange liquid in the outlet channel 140 and the sub-channel 131 provided with the spoiler 150 is greater than that in the inlet channel 120.

In the present embodiment, a spoiler 150 is disposed in each of the partial sub-channels 131 and the outlet channel 140 of the middle channel 130, so that 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 partial sub-flow passages 131 of the water outlet flow passage 140 and the intermediate flow passage 130 into two cavities having equal widths, which are spaced apart in the second direction. In alternative embodiments, more than two spoilers 150 may be provided in the outlet flow channel 140 or the sub-flow channel 131.

In alternative embodiments, the spoiler 150 may be connected to the two flow channel wall plates 110 forming the water outlet flow channel 140 and/or the sub-flow channel 131 to divide the water outlet flow channel 140 and/or the sub-flow channel 131 into two cavities spaced apart along the thickness direction of the heat exchange plate 100.

In this embodiment, in order to ensure uniformity of heat dissipation of the battery cell, the two heat exchange channels are symmetrically arranged. In fig. 3, the two heat exchange channels are arranged in mirror image in the left-right direction.

Further, the heat exchange plate 100 of the present embodiment is provided with a water inlet 103 and two water outlet 104, the two heat exchange channels share the water inlet 103, and the two water outlet 104 are respectively communicated with the downstream ends of the two heat exchange channels (i.e. the ends of the water outlet channel 140). In the present embodiment, the water outlet 104 and the water inlet 103 are both disposed at the same end (i.e., the lower end in fig. 3) of the heat exchange plate 100 in the first direction. As shown in fig. 3, the middle virtual coil at the lower position in fig. 3 corresponds to the position of the water inlet 103, and the two virtual coils at the left and right sides at the lower position correspond to the positions of the two water outlet 104. By providing a water inlet 103 to supply water to both heat exchange channels, the complexity of the piping can be reduced, thereby facilitating a reduction in the volume of the apparatus.

In this embodiment, the lower case 010 includes a water inlet pipe 300 and a water outlet pipe 400, the water inlet pipe 300 is connected to the water inlet 103, and the water outlet pipe 400 is connected to the two water outlet 104.

In this embodiment, the water inlet 103 and the water outlet 104 are located at the inner side of the accommodating cavity, and specifically open on the upper plate 101. Optionally, the shroud includes two end plates 210 spaced apart in a first direction and two side plates 200 spaced apart in a second direction. One end of the water inlet pipe 300 of the lower case 010 is connected to the water inlet hole 103, and the other end of the water inlet pipe 300 is penetrated out of the end plate 210, and the end is connected to an external heat exchange liquid supply end. One end of the water outlet pipe 400 is connected to the water outlet hole 104, and the other end of the water outlet pipe 400 passes through the end plate 210. In this embodiment, one of the end plates 210 is provided with a first through hole 211 and a second through hole 212, one end of the water inlet pipe 300 passes through the first through hole 211, and the water outlet pipe 400 passes through the second through hole 212.

Optionally, one end of the water inlet pipeline 300 and the water outlet pipeline 400 outside the accommodating cavity can be connected with a water tank through pipelines, the water tank is used for storing heat exchange liquid and can convey the heat exchange liquid into the heat exchange channel, so that the heat exchange liquid can sequentially pass through the water tank, the water inlet pipeline 300, the heat exchange channel and the water outlet pipeline 400 and then return to the water tank, and circulation is achieved.

In order to achieve better cooling effect, heat exchange channels can be arranged in the side plates 200 for heat exchange liquid to flow. The weight of the lower case 010 can also be reduced by providing the side plate 200 as a hollowed-out structure.

The embodiment of the application also provides a battery, which comprises a plurality of battery monomers and the lower box 010 provided by the embodiment, wherein the battery monomers are arranged on the heat exchange plate 100. The battery cells can be square cells, cylindrical cells, and the like.

Specifically, the battery cells can be arranged on the surface of the upper plate body 101 in an array manner, and heat-conducting glue can be arranged between the upper plate body 101 and the battery cells to eliminate air gaps, enhance heat transfer and play a certain role in fixation. Therefore, the lower case 010 provided by the embodiment of the application can be used as the lower case 010 of the battery pack, and is used for accommodating and protecting the battery cells and cooling the battery cells.

The embodiment of the application also provides electric equipment, which comprises the battery. The powered device may be an electric car or other device requiring electric drive.

In summary, the lower case 010 provided in the embodiment of the application includes the heat exchange plate 100 for supporting the battery unit and the coaming plate disposed on the heat exchange plate 100, the heat exchange plate 100 and the coaming plate together enclose a receiving cavity for receiving the battery unit, at least one heat exchange channel for flowing the heat exchange liquid is disposed in the heat exchange plate 100, each heat exchange channel includes a water inlet channel 120, a middle channel 130 and a water outlet channel 140, one end of the middle channel 130 is communicated with the water inlet channel 120, the other end is communicated with the water outlet channel 140, a water inlet is disposed on the water inlet channel 120, a water outlet is disposed on the water outlet channel 140, and a spoiler 150 protruding from the inner wall of the heat exchange channel is disposed in the middle channel 130 and/or the water outlet channel 140. The lower case 010 of the present application integrates the heat exchange plate 100, and thus the battery can be made more compact as compared to the case and the heat exchange assembly separately. Because the temperature of the heat exchange liquid flowing to the downstream is higher than that of the heat exchange liquid flowing to the upstream, the heat exchange plate 100 of the application improves the convection intensity and the flow velocity of the heat exchange liquid in the intermediate flow channel 130 and/or the water outlet flow channel 140 by arranging the spoiler 150 in the intermediate flow channel 130 and/or the water outlet flow channel 140, so that the heat exchange capability of the heat exchange liquid in the intermediate flow channel 130 and/or the water outlet flow channel 140 is improved, and the problem of the reduction of the cooling capability caused by the increase of the temperature of the heat exchange liquid is relieved. Therefore, a plurality of battery units borne by the lower box 010 can be enabled to dissipate heat more uniformly, and consistency of the battery units is improved, and service life of the battery is prolonged.

The battery provided by the embodiment of the application comprises a battery monomer and the lower box 010, wherein the battery monomer is arranged on the heat exchange plate 100. The battery unit of the battery can dissipate heat more uniformly, so that the consistency of the battery unit is good, the service life of the battery is longer, and the structure of the battery is more compact.

The electric equipment provided by the embodiment of the application comprises the battery, so that the electric equipment also has the corresponding beneficial effects.

The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (10)

1. The lower box body is characterized by comprising a heat exchange plate (100) for supporting a battery monomer and coamings arranged on the heat exchange plate (100), wherein the heat exchange plate (100) and the coamings jointly enclose a containing cavity for containing the battery monomer, at least one heat exchange channel for heat exchange liquid to flow is arranged in the heat exchange plate (100), 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 communicated with the water inlet channel (120), and the other end of the intermediate channel is communicated with the water outlet channel (140), a water inlet is arranged on the water inlet channel (120), and a water outlet is arranged on the water outlet channel (140);

Wherein, a spoiler (150) protruding out of the inner wall of the heat exchange channel is arranged in the middle flow channel (130) and/or the water outlet flow channel (140).

2. The lower case according to claim 1, wherein the water inlet flow channel (120), the intermediate flow channel (130) and the water outlet flow channel (140) all extend along a first direction, the water inlet flow channel (120), the intermediate flow channel (130) and the water outlet flow channel (140) are arranged along a second direction, and the spoiler (150) is disposed in the water outlet flow channel (140).

3. The lower case according to claim 2, wherein the intermediate flow path (130) includes a plurality of sub flow paths (131) arranged in the second direction and having end portions connected in series, and the spoiler (150) is disposed in at least two of the sub flow paths (131) adjacent to the water outlet flow path (140).

4. A lower box according to claim 2 or 3, wherein the spoiler (150) extends in the first direction and is spaced from the inner walls of the heat exchanger plate (100) at both ends in the first direction.

5. The lower case according to claim 4, wherein the spoiler (150) extends onto the inner wall of the intermediate flow passage (130) and/or the water outlet flow passage (140) along the width direction of the spoiler (150), respectively, to divide one of the intermediate flow passage (130) and/or the water outlet flow passage (140) into at least two cavities having a total cross section smaller than the cross section of the heat exchange passage where the spoiler (150) is not provided.

6. The lower box according to claim 2, characterized in that the heat exchange plate (100) comprises 2N of the heat exchange channels arranged along the second direction, wherein N is equal to or greater than 1 and N is an integer;

The end part of the water inlet flow channel (120) is provided with a water inlet, the water inlet of the 2N-1 heat exchange channels is mutually communicated with the water inlet of the 2N heat exchange channels to form a diversion flow channel (160), the heat exchange plate (100) is provided with water inlet holes (103) communicated with the diversion flow channel (160), and the end part of each water outlet flow channel (140) is provided with a water outlet hole (104).

7. The lower case according to claim 6, wherein 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.

8. The lower case according to claim 7, wherein the lower case (010) includes a water inlet pipe (300) and a water outlet pipe (400), the water inlet pipe (300) is connected to the water inlet hole (103), and the water outlet pipe (400) is connected to the water outlet hole (104).

9. A battery comprising a plurality of battery cells and the lower case (010) according to any of claims 1-8, said battery cells being arranged on said heat exchange plate (100).

10. A powered device comprising the battery of claim 9.