Energy storage device

Abstract

The invention provides an energy storage device. The energy storage device comprises a battery; a box body; the heat exchange assembly comprises a bottom plate and a heat exchange part, the bottom plate is arranged at one end of the box body, the heat exchange part is arranged on the bottom plate, the heat exchange part is located in the box body, at least two mounting cavities are defined by the heat exchange part, the bottom plate and the box body, the batteries are arranged in the mounting cavities, one end of the heat exchange part is provided with a water inlet, and the other end of the heat exchange part is communicated with the bottom plate; a water outlet is formed in one end of the bottom plate close to the water inlet.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage devices, and in particular to an energy storage device. Background Art

[0002] At present, with the increase in the application scenarios of energy storage devices, the temperature rise of batteries has become increasingly obvious, so it is necessary to add a battery cooling structure to the energy storage device. In the related art, in order to achieve battery cooling, a cooling module is integrated in the box of the energy storage device, and the box and the cooling module are welded in a welding furnace at one time. In this design, the processing is difficult, and at the same time, it can only achieve cooling on both sides of the battery, and the cooling efficiency is low. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0004] To this end, the present invention provides an energy storage device.

[0005] In view of this, the present invention proposes an energy storage device, including: a battery; a box body; a heat exchange component, the heat exchange component including a bottom plate and a heat exchange part, the bottom plate is arranged at one end of the box body, the heat exchange part is arranged on the bottom plate, the heat exchange part is located in the box body and encloses at least two installation cavities with the bottom plate and the box body, the battery is arranged in the installation cavity, wherein a water inlet is provided at one end of the heat exchange part, the other end of the heat exchange part is connected to the bottom plate, and a water outlet is provided at one end of the bottom plate close to the water inlet.

[0006] The energy storage device provided by the present invention includes a battery, a box body and a heat exchange component. The heat exchange component includes a bottom plate and a heat exchange part connected to each other. The bottom plate is arranged at one end of the box body, that is, the bottom plate constitutes the bottom wall of the box body. The heat exchange part is arranged in the box body and encloses at least two installation cavities with the bottom plate and the box body. The battery is placed in the installation cavity so that the battery is in contact with the bottom plate and the heat exchange part to achieve heat dissipation of the battery. A water inlet is arranged at one end of the heat exchange part, and the other end of the heat exchange part is connected to the bottom plate, and a water outlet is arranged on the bottom plate, so that the cooling liquid can enter the heat exchange part from the water inlet, then flow to the bottom plate through the heat exchange part, and finally flow out of the water outlet through the bottom plate, wherein the water outlet is located on the side of the bottom plate close to the water inlet, so that the liquid flows in and out from the same side of the box body, thereby increasing the contact area between the battery and the cooling liquid and improving the heat dissipation effect of the battery. In addition, the heat exchange part and the bottom plate constitute a heat exchange assembly, so that the bottom plate and the heat exchange part are highly integrated, that is, the heat exchange part and the bottom plate are regarded as a whole, rather than integrating the heat exchange part with the box body as a whole, which can reduce the processing difficulty of the energy storage device.

[0007] The energy storage device provided by the present invention may also have the following additional technical features:

[0008] In some possible designs, the heat exchange part includes: a first collecting part, which extends along a first direction of the box body and is connected to a water inlet; a second collecting part, which extends along the first direction, is arranged opposite to the first collecting part, and is connected to the bottom plate; and a plurality of first channels, which extend along the second direction of the box body, and the first channels are connected between the first collecting part and the second collecting part.

[0009] In this design, the heat exchange part includes a first collecting part, a second collecting part and a plurality of first channels. The first collecting part and the second collecting part are arranged opposite to each other and both extend along the first direction. The plurality of first channels are arranged between the first collecting part and the second collecting part along the second direction, and the plurality of first channels are connected to the first collecting part and the second collecting part, so that the liquid can enter the first collecting part from the water inlet and be distributed into the plurality of first channels, and then flow to the second collecting part through the plurality of first channels, and then flow into the bottom plate after collecting in the second collecting part, thereby realizing heat exchange between the cooling liquid and the battery.

[0010] In some possible designs, the heat exchange part also includes: a collecting pipe extending along the third direction of the box body. When there are multiple heat exchange parts, the multiple heat exchange parts are arranged at intervals along the third direction. The collecting pipe is connected to the first collecting part of the multiple heat exchange parts, and the water inlet is arranged on the collecting pipe.

[0011] In this design, the heat exchange part also includes a collecting pipe, and the water inlet is arranged on the collecting pipe. The collecting pipe extends along the third direction. When there are multiple heat exchange parts, the multiple heat exchange parts are arranged at intervals along the third direction. The collecting pipe connects the first collecting parts of the multiple heat exchange parts, so that after the cooling liquid enters the collecting pipe from the water inlet, it can flow into the multiple heat exchange parts, thereby realizing heat exchange between the heat exchange part and the battery, and improving the heat exchange effect.

[0012] In some possible designs, heat exchange parts are provided on both sides of any installation cavity.

[0013] In this design, heat exchange parts are provided on both sides of any installation cavity, so that both sides of the battery in any installation cavity can contact the heat exchange part, and the bottom of the battery can contact the bottom plate, realizing three-sided heat exchange of the battery, thereby improving the heat dissipation effect of the battery.

[0014] In some possible designs, in the first direction, a preset interval is provided between the plurality of first channels and the bottom plate; and / or a preset interval is provided between the plurality of first channels and a top wall of the box body opposite to the bottom plate.

[0015] In this design, a preset interval is set between the multiple first channels and the bottom plate, and / or a preset interval is set between the multiple first channels and the top wall of the corresponding bottom plate of the box body. On the one hand, the contact area between the battery side and the heat exchange part is reduced, thereby balancing the contact area between the battery bottom and the battery side and the cooling liquid, reducing the temperature difference between various parts of the battery, and improving the uniformity of cooling of various parts of the battery. On the other hand, it can also increase the heat dissipation of the battery bottom, thereby reducing the number of first channels, and the first channel is located in the middle section of the box body, and only needs to occupy part of the height of the box body, so that the welding height of the first channel and the first collector and the second collector is reduced.

[0016] In some possible designs, the second current collecting portion is connected to the bottom plate by brazing.

[0017] In this design, the second current collecting part and the bottom plate are connected by brazing. Specifically, the second current collecting part and the bottom plate are brazed with material by a robotic arm, and there is no need to weld in a brazing furnace, thereby reducing the processing difficulty and ensuring the flatness of the first channel after welding, thereby reducing the thermal resistance between the first channel and the battery.

[0018] In some possible designs, the first channel, the first header, and the second header are connected by brazing.

[0019] In this design, the first channel, the first current collecting part and the second current collecting part are connected by brazing. Specifically, the first channel, the first current collecting part and the second current collecting part are brazed without materials in a brazing furnace, so that the first current collecting part, the second current collecting part and the first channel are fixed and connected. At the same time, the welding height is also reduced, so that a general brazing furnace can achieve welding.

[0020] In some possible designs, the second header is connected to the bottom plate via a joint.

[0021] In this design, a joint may be provided at the connection between the second collecting portion and the bottom plate, thereby achieving better connectivity between the two.

[0022] In some possible designs, a sealing member is provided at the connection between the second header and the bottom plate.

[0023] In this design, a seal is provided at the connection between the second current collecting part and the bottom plate, which can achieve sealing of the connection between the second current collecting part and the bottom plate, avoid leakage from the connection between the two, and improve the reliability of the energy storage device.

[0024] In some possible designs, the bottom plate includes: a third collecting part, extending along the third direction of the box body, the third collecting part is connected with the second collecting part; a fourth collecting part, extending along the third direction, the fourth collecting part is arranged opposite to the third collecting part, and the fourth collecting part is connected with the water outlet; a plurality of second channels, the plurality of second channels are connected between the third collecting part and the fourth collecting part, and the second channels are arranged corresponding to the installation cavity.

[0025] In this design, the bottom plate includes a third collector, a fourth collector and a plurality of second channels. The third collector and the fourth collector both extend along the third direction. The plurality of second channels are arranged between the third collector and the fourth collector along the second direction, and the plurality of second channels are connected to the third collector and the fourth collector. In this way, the cooling liquid flows from the second collector of the heat exchange part to the third collector of the bottom plate, and then flows to the plurality of second channels, and after heat exchange with the battery, flows from the fourth collector to the water outlet. Among them, the second channel is arranged corresponding to the installation cavity, so that the battery in the installation cavity contacts the second channel, thereby realizing the heat dissipation of the battery and improving the heat dissipation effect of the battery.

[0026] In some possible designs, the box body includes: a side plate, the side plate is arranged around the bottom plate, and the water outlet is located on a side of the side plate away from the installation cavity.

[0027] In this design, the box body also includes side panels, which are arranged around the bottom plate and connected to the bottom plate, wherein the water outlet extends through the side panel to the side of the side panel away from the installation cavity to facilitate the connection of the water outlet with an external water source.

[0028] In some possible designs, there are multiple batteries, and at least one row of batteries is provided in any installation cavity.

[0029] In this design, the number of batteries is multiple, which increases the storage capacity of the energy storage device. In any installation cavity, the batteries are arranged in at least one row, which increases the contact area between the batteries and the heat exchange part and the bottom plate, thereby improving the heat exchange effect.

[0030] In some possible designs, the cells are arranged in multiple rows along the thickness direction, or the cells are arranged in multiple rows along the width direction.

[0031] In this design, the batteries can be arranged in multiple rows along the thickness direction, and then the two narrow sides of the batteries can be cooled by the heat exchange part; the batteries can also be arranged in multiple rows along the width direction, and then the two wide sides of the batteries can be cooled by the heat exchange part to speed up the heat dissipation of the batteries.

[0032] In some possible designs, the battery and the heat exchange unit, and / or the battery and the housing are connected via a heat conductor.

[0033] In this design, the battery and the heat exchange part and / or the battery and the box are connected by a heat conductor, which improves the thermal conductivity between the battery and the heat exchange part and the box. While achieving battery fixation, it also improves the heat dissipation effect, reduces the use of other structural parts, and reduces the cost of the entire power supply device.

[0034] In some possible designs, there are multiple water inlets and multiple water outlets, the multiple water inlets are symmetrically arranged along the second direction of the box body, and the multiple water outlets are symmetrically arranged along the second direction of the box body.

[0035] In this design, the energy storage device includes a plurality of symmetrically arranged water inlets and water outlets, thereby increasing the water inlet efficiency and the water outlet efficiency.

[0036] Additional aspects and advantages of the present invention will become apparent from the following description or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0038] Figure 1 One of the structural schematic diagrams of an energy storage device according to an embodiment of the present invention is shown;

[0039] Figure 2 A second structural schematic diagram of an energy storage device according to an embodiment of the present invention is shown;

[0040] Figure 3 Shows Figure 2 A cross-sectional view taken along the line AA of the embodiment shown;

[0041] Figure 4 One of the structural schematic diagrams of a heat exchange assembly according to an embodiment of the present invention is shown;

[0042] Figure 5 A second structural schematic diagram of a heat exchange assembly according to an embodiment of the present invention is shown;

[0043] Figure 6 A third structural schematic diagram of a heat exchange assembly according to an embodiment of the present invention is shown;

[0044] Figure 7 A fourth structural schematic diagram of a heat exchange assembly according to an embodiment of the present invention is shown;

[0045] Figure 8 Shows Figure 6 A BB sectional view of the embodiment shown;

[0046] Fig. 9 A fifth structural schematic diagram of a heat exchange component according to an embodiment of the present invention is shown.

[0047] in, Figures 1 to 9 The corresponding relationship between the reference numerals and the component names is as follows:

[0048] 1 battery, 2 box body, 20 side plate, 3 heat exchange assembly, 30 bottom plate, 300 water outlet, 301 third collector, 302 fourth collector, 303 second channel, 31 heat exchange part, 310 water inlet, 311 first collector, 312 second collector, 313 first channel, 314 collector, 32 installation cavity. DETAILED DESCRIPTION

[0049] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0050] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0051] Refer to the following Figures 1 to 9 An energy storage device according to some embodiments of the present invention is described.

[0052] like Figure 1 , Figure 2 and Figure 3 As shown, according to one embodiment of the present invention, the present invention proposes an energy storage device, including: a battery 1, a box 2 and a heat exchange component 3.

[0053] Specifically, the heat exchange assembly 3 includes a bottom plate 30 and a heat exchange part 31. The bottom plate 30 is arranged at one end of the box body 2, and the heat exchange part 31 is arranged on the bottom plate 30. The heat exchange part 31 is located in the box body 2 and encloses at least two installation cavities 32 with the bottom plate 30 and the box body 2. The battery 1 is arranged in the installation cavity 32, wherein a water inlet 310 is provided at one end of the heat exchange part 31, and the other end of the heat exchange part 31 is connected to the bottom plate 30, and a water outlet 300 is provided at one end of the bottom plate 30 close to the water inlet 310.

[0054] The energy storage device provided by the present invention includes a battery 1, a box body 2 and a heat exchange assembly 3. The heat exchange assembly 3 includes a bottom plate 30 and a heat exchange part 31 connected to each other. The bottom plate 30 is arranged at one end of the box body 2, that is, the bottom plate 30 constitutes the bottom wall of the box body 2. The heat exchange part 31 is arranged in the box body 2 and encloses at least two installation cavities 32 with the bottom plate 30 and the box body 2. The battery 1 is placed in the installation cavity 32 so that the battery 1 is in contact with the bottom plate 30 and the heat exchange part 31 to achieve heat dissipation of the battery 1. One end of the heat exchange part 31 is provided with a water inlet 310, and the other end of the heat exchange part 31 is connected to the bottom plate 30, and a water outlet 300 is provided on the bottom plate 30, so that the cooling liquid can enter the heat exchange part 31 through the water inlet 310, and then flow to the bottom plate 30 through the heat exchange part 31, and finally flow out of the water outlet 300 through the bottom plate 30, wherein the water outlet 300 is located on the side of the bottom plate 30 close to the water inlet 310, so that the liquid flows in and out from the same side of the box 2, thereby increasing the contact area between the battery 1 and the cooling liquid, and improving the heat dissipation effect of the battery 1. In addition, the heat exchange part 31 and the bottom plate 30 constitute a heat exchange assembly 3, so that the bottom plate 30 and the heat exchange part 31 are highly integrated, that is, the heat exchange part 31 and the bottom plate 30 are regarded as a whole, which can reduce the processing difficulty of the energy storage device.

[0055] Optionally, the box body 2 also includes a side plate 20 surrounding the bottom plate 30, and any installation cavity 32 is surrounded by a portion of the bottom plate 30, a portion of the heat exchange portion 31 and a portion of the side plate 20, and the battery 1 placed in the installation cavity 32 can contact the bottom plate 30 and the heat exchange portion 31.

[0056] Optionally, the heat exchange portion 31 is connected to the bottom plate 30 by welding, and then the side plate 20 is assembled, which can reduce the difficulty of welding.

[0057] In a specific application, the heat exchange part 31 is first welded as a whole in a brazing furnace, and then the heat exchange part 31 and the bottom plate 30 are welded by a mechanical arm outside the brazing furnace to form a heat exchange assembly 3. The welding height of the welding furnace is reduced, and then the welding can be achieved using an ordinary welding furnace, which reduces the processing difficulty and cost. At the same time, the overall flatness of the heat exchange part 31 is improved, the contact area between the battery 1 and the heat exchange part 31 is guaranteed, and the thermal resistance between the battery 1 and the heat exchange part 31 is reduced.

[0058] Optionally, after the welding of the heat exchange component 3 is completed, the box body 2 and the heat exchange component 3 are welded, which reduces the processing difficulty.

[0059] Of course, the heat exchange assembly 3 can also be welded as a whole in a welding furnace, or the heat exchange assembly 3 can be welded as a whole outside the welding furnace by using equipment such as a robot arm.

[0060] It is understandable that a channel for liquid to flow is provided in the bottom plate 30 , and the bottom plate 30 blocks one end of the box body 2 to define the box body 2 together with the side plate 20 .

[0061] like Figure 4 As shown, according to some embodiments of the present application, optionally, the heat exchange portion 31 includes: a first header 311 , a second header 312 and a plurality of first channels 313 .

[0062] Specifically, the first collecting section 311 extends along the first direction of the box body 2 and is connected to the water inlet 310; the second collecting section 312 extends along the first direction, the second collecting section 312 is arranged opposite to the first collecting section 311, and the second collecting section 312 is connected to the bottom plate 30; multiple first channels 313 extend along the second direction of the box body 2, and the first channels 313 are connected between the first collecting section 311 and the second collecting section 312.

[0063] In this embodiment, the heat exchange part 31 includes a first collecting part 311, a second collecting part 312 and a plurality of first channels 313. The first collecting part 311 and the second collecting part 312 are arranged opposite to each other and both extend along the first direction. The plurality of first channels 313 are arranged between the first collecting part 311 and the second collecting part 312 along the second direction, and the plurality of first channels 313 are connected to the first collecting part 311 and the second collecting part 312, so that the liquid can enter the first collecting part 311 from the water inlet 310, and then be distributed into the plurality of first channels 313, and then flow to the second collecting part 312 through the plurality of first channels 313, and then flow into the bottom plate 30 after collecting in the second collecting part 312, thereby realizing heat exchange between the cooling liquid and the battery 1.

[0064] Optionally, any first channel 313 includes a plurality of sub-channels. Specifically, at least some of the sub-channels have different flow areas.

[0065] like Figure 4 and Figure 5 As shown, according to some embodiments of the present application, optionally, the heat exchange part 31 further includes: a header 314. Specifically, the header 314 extends along the third direction of the box body 2. When there are multiple heat exchange parts 31, the multiple heat exchange parts 31 are arranged at intervals along the third direction. The header 314 is connected to the first header 311 of the multiple heat exchange parts 31, and the water inlet 310 is provided on the header 314.

[0066] In this embodiment, the heat exchange part 31 also includes a collecting pipe 314, and the water inlet 310 is arranged on the collecting pipe 314. The collecting pipe 314 extends along the third direction. When there are multiple heat exchange parts 31, the multiple heat exchange parts 31 are arranged at intervals along the third direction. The collecting pipe 314 connects the first collecting parts 311 of the multiple heat exchange parts 31, so that the cooling liquid can flow into the multiple heat exchange parts 31 after entering the collecting pipe 314 from the water inlet 310, thereby realizing heat exchange between the heat exchange part 31 and the battery 1, thereby improving the heat exchange effect.

[0067] like Figure 1 and Figure 3 As shown, according to some embodiments of the present application, optionally, heat exchange parts 31 are provided on both sides of any installation cavity 32 .

[0068] In this embodiment, heat exchange parts 31 are provided on both sides of any installation cavity 32, so that both sides of the battery 1 in any installation cavity 32 can contact with the heat exchange parts 31, and the bottom of the battery 1 can contact with the bottom plate 30, thereby realizing three-sided heat exchange of the battery 1, thereby improving the heat dissipation effect of the battery 1.

[0069] like Figure 3 , Figure 7 and Figure 8 As shown, according to some embodiments of the present application, optionally, in the first direction, a plurality of first channels 313 and the bottom plate 30 have a preset interval; and / or, a plurality of first channels 313 and the top wall on the box body 2 opposite to the bottom plate 30 have a preset interval.

[0070] In this embodiment, a preset interval is set between the multiple first channels 313 and the bottom plate 30, and / or a preset interval is set between the multiple first channels 313 and the top wall of the bottom plate 30 corresponding to the box body 2. On the one hand, the contact area between the side of the battery 1 and the heat exchange part 31 is reduced, thereby balancing the contact area between the bottom of the battery 1 and the side of the battery 1 and the cooling liquid, reducing the temperature difference between the various parts of the battery 1, and improving the uniformity of cooling of the various parts of the battery 1. On the other hand, it can also increase the heat dissipation at the bottom of the battery 1, thereby reducing the number of the first channels 313, and the first channels 313 are located in the middle section of the box body 2, and only need to occupy part of the height of the box body 2, so that the welding height of the first channels 313 and the first collector 311 and the second collector 312 is reduced.

[0071] In a specific application, the uniformity of the temperature of different batteries 1 can be improved to 3° C., that is, the temperature uniformity of the battery 1 is less than or equal to 3° C., so that the temperature of each part of the battery 1 is more uniform, thereby improving the performance of the battery 1 .

[0072] Specifically, the sum of the contact areas between the side walls on both sides of the battery 1 and the heat exchange portion 31 is substantially equal to the contact area between the bottom of the battery 1 and the bottom plate 30 .

[0073] According to some embodiments of the present application, optionally, the second collecting portion 312 is connected to the bottom plate 30 by brazing.

[0074] In this embodiment, the second current collecting portion 312 and the bottom plate 30 are connected by brazing. Specifically, the second current collecting portion 312 and the bottom plate 30 are brazed with material by a robot arm, and there is no need to weld in a brazing furnace, thereby reducing the processing difficulty and ensuring the flatness of the first channel 313 after welding, thereby reducing the thermal resistance between the first channel 313 and the battery 1.

[0075] Specifically, the second header 312 and the bottom plate 30 are welded by a robot arm outside the brazing furnace, so that the height of welding in the brazing furnace in the subsequent steps can be reduced, and then the manufacturing can be performed using a general welding furnace.

[0076] According to some embodiments of the present application, optionally, the first channel 313 , the first collecting portion 311 , and the second collecting portion 312 are connected by brazing.

[0077] In this embodiment, the first channel 313, the first current collecting part 311 and the second current collecting part 312 are connected by brazing. Specifically, the first channel 313, the first current collecting part 311 and the second current collecting part 312 are brazed without any material in a brazing furnace, so that the first current collecting part 311, the second current collecting part 312 and the first channel 313 are fixed and connected. At the same time, the welding height is also reduced, so that a general brazing furnace can be used for welding.

[0078] It is understandable that in the embodiment proposed in the present application, the first channel 313, the first collector 311 and the second collector 312 are welded in a brazing furnace, that is, the heat exchange part 31 is welded in a brazing furnace. The second collector 312 and the bottom plate 30 are welded by a robot arm outside the brazing furnace, that is, the connection between the heat exchange part 31 and the bottom plate 30 is realized outside the brazing furnace, so that multiple parts of the energy storage device are welded separately, which reduces the integration of the box body 2 and the heat exchange part 31 of the energy storage device. Compared with the method of welding the box body 2 and the heat exchange part 31 as a whole in a brazing furnace, the welding height of the present application is reduced, and then it can be manufactured using a general welding furnace, which reduces the difficulty of processing.

[0079] According to some embodiments of the present application, optionally, the second collecting portion 312 is connected to the bottom plate 30 via a joint.

[0080] In this embodiment, a joint may be provided at the connection between the second collecting portion 312 and the bottom plate 30 to better achieve the connection between the two.

[0081] According to some embodiments of the present application, optionally, a seal is provided at the connection between the second collecting portion 312 and the bottom plate 30 .

[0082] In this embodiment, a seal is provided at the connection between the second current collecting part 312 and the bottom plate 30, so as to achieve sealing at the connection between the second current collecting part 312 and the bottom plate 30, avoid leakage from the connection between the two, and improve the reliability of the energy storage device.

[0083] like Figure 4 , Figure 6 and Fig. 9 As shown, according to some embodiments of the present application, optionally, the bottom plate 30 includes: a third collecting portion 301 , a fourth collecting portion 302 and a plurality of second channels 303 .

[0084] Specifically, the third collecting part 301 extends along the third direction of the box body 2, and the third collecting part 301 is connected with the second collecting part 312; the fourth collecting part 302 extends along the third direction, and the fourth collecting part 302 is arranged opposite to the third collecting part 301, and the fourth collecting part 302 is connected with the water outlet 300; multiple second channels 303 are connected between the third collecting part 301 and the fourth collecting part 302, and the second channels 303 are arranged corresponding to the installation cavity 32.

[0085] In this embodiment, the bottom plate 30 includes a third collector 301, a fourth collector 302 and a plurality of second channels 303. The third collector 301 and the fourth collector 302 both extend along the third direction. The plurality of second channels 303 are arranged between the third collector 301 and the fourth collector 302 along the second direction, and the plurality of second channels 303 are connected with the third collector 301 and the fourth collector 302. In this way, the cooling liquid flows from the second collector 312 of the heat exchange part 31 to the third collector 301 of the bottom plate 30, and then flows to the plurality of second channels 303, realizes heat exchange with the battery 1, and then flows from the fourth collector 302 to the water outlet 300. Among them, the second channel 303 is arranged corresponding to the installation cavity 32, so that the battery 1 in the installation cavity 32 contacts the second channel 303, thereby realizing heat dissipation of the battery 1 and improving the heat dissipation effect of the battery 1.

[0086] In a specific application, the plurality of second channels 303 are divided into a plurality of groups of channels, any one group of channels includes a plurality of second channels 303 , and the plurality of groups of channels are arranged in a one-to-one correspondence with the plurality of mounting cavities 32 .

[0087] like Figure 1 and Figure 2 As shown, according to some embodiments of the present application, optionally, the box body 2 includes: a side plate 20. The side plate 20 is arranged around the bottom plate 30, and the water outlet 300 is located on a side of the side plate 20 away from the installation cavity 32.

[0088] In this embodiment, the box body 2 also includes a side panel 20, which is arranged around the bottom plate 30 and connected to the bottom plate 30, wherein the water outlet 300 extends through the side panel 20 to the side of the side panel 20 away from the installation cavity 32, so as to facilitate the connection of the water outlet 300 with an external water source.

[0089] In a specific application, a portion of the side plate 20 , the heat exchange portion 31 and a portion of the bottom plate 30 enclose a mounting cavity 32 .

[0090] like Figure 1 and Figure 2 As shown, according to some embodiments of the present application, optionally, there are multiple batteries 1 , and at least one row of batteries 1 is provided in any installation cavity 32 .

[0091] In this embodiment, there are multiple batteries 1, which increases the storage capacity of the energy storage device. In any installation cavity 32, the batteries 1 are arranged in at least one row, which increases the contact area between the batteries 1 and the heat exchange part 31 and the bottom plate 30, thereby improving the heat exchange effect.

[0092] In a specific application, a row of batteries 1 is arranged in any installation cavity 32 to achieve cooling of at least three sides of the batteries 1 .

[0093] According to some embodiments of the present application, optionally, the batteries 1 are arranged into multiple rows along the thickness direction, or the batteries 1 are arranged into multiple rows along the width direction.

[0094] In this embodiment, the batteries 1 can be arranged into multiple rows along the thickness direction, and then the two narrow sides of the batteries 1 are cooled by the heat exchange part 31; the batteries 1 can also be arranged into multiple rows along the width direction, and then the two wide sides of the batteries 1 are cooled by the heat exchange part 31 to accelerate the heat dissipation of the batteries 1.

[0095] According to some embodiments of the present application, optionally, the battery 1 and the heat exchange portion 31 , and / or the battery 1 and the box body 2 are connected via a heat conductive member.

[0096] In this embodiment, the battery 1 and the heat exchange part 31 and / or the battery 1 and the housing 2 are connected via a heat conductor, thereby improving the thermal conductivity between the battery 1 and the heat exchange part 31 and the housing 2. While fixing the battery 1, the heat dissipation effect is also improved, the use of other structural parts is reduced, and the cost of the entire power supply device is reduced.

[0097] In a specific application, the heat conducting member includes a heat conducting structural adhesive.

[0098] According to some embodiments of the present application, optionally, there are multiple water inlets 310 and multiple water outlets 300, and the multiple water inlets 310 are symmetrically arranged along the second direction of the box body 2, and the multiple water outlets 300 are symmetrically arranged along the second direction of the box body 2.

[0099] In this embodiment, the energy storage device includes a plurality of symmetrically arranged water inlets 310 and water outlets 300, thereby increasing water inlet efficiency and water outlet efficiency.

[0100] Optionally, along the third direction, the water inlet 310 is located above the water outlet 300 .

[0101] In a specific application, the first channel 313 is a microchannel. The first current collecting portion 311 is a front current collector, and the second current collecting portion 312 is a rear current collector. The battery 1 includes a battery cell, and the energy storage device includes a battery pack.

[0102] The energy storage device proposed in this application has a reduced integration level and a welding height reduced from 220 mm to 120 mm, so that a general welding furnace can be used to manufacture the product; the temperature uniformity of different battery cells is improved from 5° to 3°; the flatness of the microchannel caused by welding is reduced from 2 mm to 1 mm, which can reduce the thermal resistance between the microchannel and the battery cell.

[0103] The microchannel and the current collector (the front current collector and the rear current collector) are integrally brazed without material using a brazing furnace; the current collector and the stamped bottom plate 30 are brazed with material using a robot arm.

[0104] Fig. 9 The water flow diagram is shown: the water path of the entire energy storage device is divided into two symmetrical inlets and outlets on the left and right. When water flows into the front collector from the water inlet 310, it enters the microchannel through 9 different cross-sectional areas, then flows into the bottom plate 30 at the rear collector, and finally flows to the water outlet 300 through the bottom plate 30.

[0105] Optionally, the microchannels are 3 series aluminum to facilitate profile extrusion.

[0106] Optionally, a thermally conductive structural adhesive is encapsulated between the battery cell and the microchannel, the bottom plate 30, and the side wall.

[0107] Optionally, the microchannels and the bottom plate 30, the front collector, and the rear collector are highly integrated; when the liquid enters different microchannels, their cross sections need to be shielded in different proportions. The flow channel integrated in the bottom plate 30 is prepared by stamping plates, combined brazing, inflation, and other processes.

[0108] Optionally, the front current collector, the rear current collector and the bottom plate 30 may be welded or have a rubber sealing mechanism.

[0109] Optionally, the microchannel is divided into two or more microchannel groups.

[0110] Optionally, the microchannel and the bottom plate 30 are connected by a pipe joint.

[0111] In the present invention, the term "plurality" refers to two or more than two, unless otherwise clearly defined. The terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0112] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0113] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An energy storage device, characterized in that: include: Battery; Box; A heat exchange component, the heat exchange component includes a bottom plate and a heat exchange part, the bottom plate is arranged at one end of the box body, the heat exchange part is arranged on the bottom plate, the heat exchange part is located in the box body and encloses at least two installation cavities with the bottom plate and the box body, and the battery is arranged in the installation cavity, Wherein, a water inlet is provided at one end of the heat exchange part, the other end of the heat exchange part is communicated with the bottom plate, and a water outlet is provided at one end of the bottom plate close to the water inlet.

2. The energy storage device according to claim 1, characterized in that: The heat exchange part comprises: a first collecting portion, the first collecting portion extending along a first direction of the box body and communicating with the water inlet; a second current collecting portion extending along the first direction, the second current collecting portion being arranged opposite to the first current collecting portion, and the second current collecting portion being connected to the bottom plate; A plurality of first channels extend along the second direction of the box body, wherein the first channels are connected between the first header and the second header.

3. The energy storage device according to claim 2, characterized in that: The heat exchange part also includes: The collecting pipe extends along the third direction of the box body. When there are multiple heat exchange parts, the multiple heat exchange parts are arranged at intervals along the third direction. The collecting pipe is connected to the first collecting parts of the multiple heat exchange parts, and the water inlet is arranged on the collecting pipe.

4. The energy storage device according to claim 3, characterized in that: The heat exchange parts are provided on both sides of any installation cavity.

5. The energy storage device according to claim 2, characterized in that: In the first direction, there is a preset interval between the plurality of first channels and the bottom plate; and / or There is a preset interval between the plurality of first channels and a top wall of the box body opposite to the bottom plate.

6. The energy storage device according to claim 2, characterized in that: The second current collecting portion is connected to the bottom plate by brazing; and / or The first channel, the first current collecting portion, and the second current collecting portion are connected by brazing.

7. The energy storage device according to claim 2, characterized in that: The second current collecting portion is connected to the bottom plate via a joint; or A sealing member is provided at the connection between the second collecting portion and the bottom plate.

8. The energy storage device according to claim 2, characterized in that: The bottom plate comprises: a third collecting portion extending along a third direction of the box body, the third collecting portion being in communication with the second collecting portion; a fourth collecting portion extending along the third direction, the fourth collecting portion being arranged opposite to the third collecting portion, and the fourth collecting portion being communicated with the water outlet; A plurality of second channels are connected between the third header and the fourth header, and the second channels are arranged corresponding to the mounting cavity.

9. The energy storage device according to any one of claims 1 to 8, characterized in that: The box body comprises: The side plate is arranged around the bottom plate, and the water outlet is located on a side of the side plate away from the installation cavity.

10. The energy storage device according to any one of claims 1 to 8, characterized in that: There are multiple batteries, and at least one row of batteries is arranged in any one of the installation cavities; The battery and the heat exchange part, and / or the battery and the box are connected via a heat conductive member.

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