CN220367991U - Energy storage device - Google Patents

Abstract

The utility model provides an energy storage device, comprising: a battery; a case; 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 arranged in the box body and surrounds at least two mounting cavities with the bottom plate and the box body, the battery is arranged in the mounting cavities, the water inlet is formed in one end of the heat exchange part, the other end of the heat exchange part is communicated with the bottom plate, and the water outlet is formed in one end, close to the water inlet, of the bottom plate.

Description

Energy storage device

Technical Field

The utility model relates to the technical field of energy storage devices, in particular to an energy storage device.

Background

At present, with the increase of application scenes of the energy storage device, the temperature rise of the battery is gradually obvious, so that a cooling structure of the battery needs to be added in the energy storage device. In the related art, in order to realize the cooling of battery, integrated cooling module in energy memory's box to make box and cooling module one-time welding shaping in the welding furnace, in this kind of design, the processing degree of difficulty is big, and simultaneously, it can only realize the cooling of battery both sides, and cooling efficiency is low.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art or related art.

To this end, the utility model provides an energy storage device.

In view of this, the present utility model proposes an energy storage device comprising: a battery; a case; 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 arranged in the box body and surrounds at least two mounting cavities with the bottom plate and the box body, the battery is arranged in the mounting cavities, the water inlet is formed in one end of the heat exchange part, the other end of the heat exchange part is communicated with the bottom plate, and the water outlet is formed in one end, close to the water inlet, of the bottom plate.

The utility model provides an energy storage device which comprises a battery, a box body and a heat exchange assembly. The heat exchange assembly comprises a bottom plate and a heat exchange part which are connected, the bottom plate is arranged at one end of the box body, namely the bottom plate forms the bottom wall of the box body, the heat exchange part is arranged in the box body, at least two mounting cavities are formed by surrounding the bottom plate and the box body, and the battery is placed in the mounting cavities so that the battery contacts with the bottom plate and the heat exchange part, and heat dissipation of the battery is realized. The one end of heat exchange portion is provided with the water inlet, and the other end and the bottom plate intercommunication of heat exchange portion are provided with the delivery port on the bottom plate, and like this, cooling liquid can get into heat exchange portion by the water inlet, then flow to the bottom plate through heat exchange portion, finally flow out the delivery port through the bottom plate, wherein, the delivery port is located the bottom plate and is close to one side of water inlet for liquid flows in and flows out by the same one side of box, has consequently improved the area of contact of battery and cooling liquid, has promoted the radiating effect of battery. In addition, the heat exchange part and the bottom plate form a heat exchange assembly, so that the bottom plate and the heat exchange part are highly integrated, namely the heat exchange part and the bottom plate are taken as a whole, and the heat exchange part and the box body are not integrally integrated, so that the processing difficulty of the energy storage device can be reduced.

The energy storage device provided by the utility model can also have the following additional technical characteristics:

in some possible designs, the heat exchange portion includes: the first current collecting part extends along the first direction of the box body and is communicated with the water inlet; the second current collecting part extends along the first direction, is arranged opposite to the first current collecting part and is communicated with the bottom plate; the first channels extend along the second direction of the box body, and the first channels are communicated between the first current collecting part and the second current collecting part.

In this design, heat exchange part includes first mass flow portion, second mass flow portion and a plurality of first passageway, first mass flow portion and second mass flow portion are relative to be set up and all extend along first direction, a plurality of first passageways set up between first mass flow portion and second mass flow portion along the second direction, and a plurality of first passageways are connected with first mass flow portion and second mass flow portion for after the liquid can get into first mass flow portion by the water inlet, distribute in a plurality of first passageways, and then flow into second mass flow portion through a plurality of first passageways, flow into in the bottom plate after the mass flow in the second mass flow portion, realized the heat transfer of cooling liquid and battery.

In some possible designs, the heat exchange portion further comprises: and the collecting pipe extends along the third direction of the box body, under the condition that the number of the heat exchange parts is multiple, the heat exchange parts are arranged at intervals along the third direction, the collecting pipe is communicated with the first collecting part of the heat exchange parts, and the water inlet is formed in the collecting pipe.

In this design, heat exchange portion still includes the pressure manifold, and the water inlet setting is on the pressure manifold, and the pressure manifold extends along the third direction, and under the circumstances that the quantity of heat exchange portion is a plurality of, a plurality of heat exchange portions set up along the third direction interval, and the first mass flow portion of pressure manifold intercommunication a plurality of heat exchange portions, and then make cooling liquid get into the pressure manifold by the water inlet after, can flow to a plurality of heat exchange portions in, realize the heat transfer of heat exchange portion and battery, promoted the heat transfer effect.

In some possible designs, heat exchange portions are provided on both sides of either mounting cavity.

In this design, the both sides of arbitrary installation cavity all are provided with heat transfer portion for the battery both sides in arbitrary installation cavity all can with heat transfer portion contact, the bottom of battery can with the bottom plate contact, realized the trilateral heat transfer of battery, and then promoted the radiating effect of battery.

In some possible designs, the plurality of first channels have a predetermined spacing from the bottom plate in the first direction; and/or, a preset interval is arranged between the plurality of first channels and the top wall of the box body opposite to the bottom plate.

In the design, preset intervals are arranged between the first channels and the bottom plate, and/or preset intervals are arranged between the first channels and the top wall of the bottom plate corresponding to the box body, so that on one hand, the contact area between the side face of the battery and the heat exchange part is reduced, the contact areas between the bottom of the battery and the side face of the battery and cooling liquid are balanced, the temperature difference of each part of the battery is reduced, and the cooling uniformity of each part of the battery is improved. On the other hand, can also increase the heat dissipation of battery bottom, and then reduce the quantity of first passageway to, first passageway is located the middle section of box, only needs to occupy the partial height of box, makes the welding height of first passageway and first mass flow portion, second mass flow portion reduce.

In some possible designs, the second header is connected to the base plate by brazing.

In the design, the second current collecting part is connected with the bottom plate through brazing, specifically, the second current collecting part is brazed with the bottom plate by adopting a mechanical arm with materials, welding in a brazing furnace is not needed, the processing difficulty is further reduced, the flatness of the first channel after welding is ensured, and the thermal resistance between the first channel and the battery is further reduced.

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

In the design, the first channel, the first current collecting part and the second current collecting part are connected through brazing, specifically, the first channel, the first current collecting part and the second current collecting part are brazed integrally by adopting a brazing furnace without materials, and the fixing and the conduction of the first current collecting part, the second current collecting part and the first channel are realized. Meanwhile, the welding height is reduced, so that the universal brazing furnace can realize welding.

In some possible designs, the second header is connected to the base plate by a joint.

In the design, the joint can be arranged at the joint of the second current collecting part and the bottom plate, so that the communication of the second current collecting part and the bottom plate is better realized.

In some possible designs, a seal is provided at the junction between the second header and the base plate.

In the design, the sealing piece is arranged at the joint of the second current collecting part and the bottom plate, so that the sealing of the joint of the second current collecting part and the bottom plate can be realized, the leakage of the joint between the second current collecting part and the bottom plate is avoided, and the reliability of the energy storage device is improved.

In some possible designs, the base plate includes: the third current collecting part extends along a third direction of the box body and is communicated with the second current collecting part; the fourth current collecting part extends along the third direction, is arranged opposite to the third current collecting part and is communicated with the water outlet; the second channels are communicated between the third current collecting part and the fourth current collecting part and are arranged corresponding to the mounting cavities.

In this design, the bottom plate includes third current collector, fourth current collector and a plurality of second passageways, and third current collector and fourth current collector all extend along the third direction, and a plurality of second passageways set up along the second direction between third current collector and fourth current collector, and a plurality of second passageways communicate with third current collector and fourth current collector, so, cooling liquid flows to the third current collector of bottom plate from the second current collector of heat transfer portion, then flows to a plurality of second passageways, realizes with the heat transfer of battery the back flow to the delivery port from fourth current collector. The second channel is arranged corresponding to the mounting cavity, so that the battery in the mounting cavity is in contact with the second channel, heat dissipation of the battery is further achieved, and the heat dissipation effect of the battery is improved.

In some possible designs, the case includes: the side plate is arranged around the bottom plate in a surrounding mode, and the water outlet is arranged on one side, away from the mounting cavity, of the side plate.

In this design, the box still includes the curb plate, and the curb plate encloses to establish around the bottom plate to be connected with the bottom plate, wherein, the delivery port passes the curb plate and extends to the side that the curb plate deviates from the installation cavity, in order to be convenient for the connection of delivery port and outside water source.

In some possible designs, the number of cells is multiple, with at least one row of cells being provided in any one mounting cavity.

In this design, the number of batteries is multiple, increasing the amount of stored energy of the energy storage device. In any installation cavity, the batteries are arranged into at least one row, so that the contact area between the batteries and the heat exchange part as well as the contact area between the batteries and the bottom plate are increased, and the heat exchange effect is further improved.

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

In this design, the cells may be arranged in a plurality of rows in the thickness direction, and the two narrow faces of the cells are cooled by the heat exchanging part; the batteries can be arranged in a plurality of rows along the width direction, and then the two wide faces of the batteries are cooled through the heat exchange part, so that heat dissipation of the batteries is accelerated.

In some possible designs, the battery is connected to the heat exchange portion and/or the battery is connected to the case via a heat conductive member.

In this design, connect through the heat conduction spare between battery and the heat exchange portion and/or between battery and the box, improved the heat conduction effect between battery and heat exchange portion, the box, when realizing that the battery is fixed, still promoted radiating effect, reduced the use of other structures, reduced whole power supply unit's cost.

In some possible designs, the number of water inlets and water outlets is plural, the plurality of water inlets being symmetrically disposed along the second direction of the tank, and the plurality of water outlets being symmetrically disposed along the second direction of the tank.

In this design, energy storage device includes a plurality of water inlets and delivery port that the symmetry set up, and then has increased water inlet efficiency and play water efficiency.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 shows one of the schematic structural diagrams of an energy storage device according to an embodiment of the present utility model;

FIG. 2 shows a second schematic structure of an energy storage device according to an embodiment of the utility model;

FIG. 3 shows a cross-sectional view of the embodiment of FIG. 2 in the A-A direction;

FIG. 4 shows one of the schematic structural views of a heat exchange assembly according to one embodiment of the present utility model;

FIG. 5 shows a second schematic view of the heat exchange assembly of an embodiment of the present utility model;

FIG. 6 illustrates a third schematic view of a heat exchange assembly according to one embodiment of the present utility model;

FIG. 7 shows a fourth schematic structural view of a heat exchange assembly according to one embodiment of the present utility model;

FIG. 8 shows a B-B cross-sectional view of the embodiment of FIG. 6;

fig. 9 shows a fifth schematic structural view of a heat exchange assembly according to an embodiment of the present utility model.

The correspondence between the reference numerals and the component names in fig. 1 to 9 is:

the device comprises a battery 1, a box 2, a side plate 20, a heat exchange component 3, a bottom plate 30, a water outlet 300, a third collecting part 301, a fourth collecting part 302, a second channel 303, a heat exchange part 31, a water inlet 310, a first collecting part 311, a second collecting part 312, a first channel 313, a collecting pipe 314 and a collecting pipe 32.

Detailed Description

In order that the above-recited objects, features and advantages of the present utility model will be more clearly understood, a more particular description of the utility model will be rendered by reference to the appended drawings and appended detailed description. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, however, the present utility model may be practiced in other ways than those described herein, and therefore the scope of the present utility model is not limited to the specific embodiments disclosed below.

An energy storage device according to some embodiments of the present utility model is described below with reference to fig. 1 to 9.

As shown in fig. 1, 2 and 3, according to an embodiment of the present utility model, the present utility model proposes an energy storage device including: battery 1, box 2 and heat exchange assembly 3.

Specifically, the heat exchange assembly 3 includes a bottom plate 30 and a heat exchange portion 31, the bottom plate 30 is disposed at one end of the box 2, the heat exchange portion 31 is disposed on the bottom plate 30, the heat exchange portion 31 is disposed in the box 2 and surrounds at least two mounting cavities 32 with the bottom plate 30 and the box 2, the battery 1 is disposed in the mounting cavities 32, a water inlet 310 is disposed at one end of the heat exchange portion 31, the other end of the heat exchange portion 31 is communicated with the bottom plate 30, and a water outlet 300 is disposed at one end of the bottom plate 30 close to the water inlet 310.

The utility model provides an energy storage device which comprises a battery 1, a box body 2 and a heat exchange assembly 3. The heat exchange assembly 3 comprises a bottom plate 30 and a heat exchange part 31 which are connected, the bottom plate 30 is arranged at one end of the box body 2, namely, the bottom plate 30 forms the bottom wall of the box body 2, the heat exchange part 31 is arranged in the box body 2 and surrounds at least two mounting cavities 32 with the bottom plate 30 and the box body 2, and the battery 1 is placed in the mounting cavities 32 so that the battery 1 contacts with the bottom plate 30 and the heat exchange part 31 to realize heat dissipation of the battery 1. The one end of heat exchange portion 31 is provided with water inlet 310, and the other end and the bottom plate 30 intercommunication of heat exchange portion 31, and be provided with delivery port 300 on the bottom plate 30, so, cooling liquid can get into heat exchange portion 31 by water inlet 310, then flow to bottom plate 30 through heat exchange portion 31, finally flow out delivery port 300 through bottom plate 30, wherein, delivery port 300 is located the bottom plate 30 and is close to water inlet 310's one side for liquid flows in and out by the same side of box 2, has consequently improved battery 1 and cooling liquid's area of contact, has promoted battery 1's radiating effect. In addition, the heat exchange part 31 and the bottom plate 30 form the 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 taken as a whole, and the processing difficulty of the energy storage device can be reduced.

Optionally, the case 2 further includes a side plate 20 surrounding the bottom plate 30, and any of the mounting cavities 32 is surrounded by a portion of the bottom plate 30, a portion of the heat exchanging portion 31, and a portion of the side plate 20, and the battery 1 placed in the mounting cavity 32 can be in contact with the bottom plate 30 and the heat exchanging portion 31.

Optionally, after the heat exchanging part 31 is welded to the bottom plate 30, the side plate 20 is assembled, so that the welding difficulty can be reduced.

In a specific application, the heat exchange part 31 is welded into a whole in a brazing furnace, and then the heat exchange part 31 and the bottom plate 30 are welded outside the brazing furnace through a mechanical arm to form the heat exchange assembly 3. The welding height of the welding furnace is reduced, and then the welding can be realized by using the common welding furnace, so that the processing difficulty and cost are reduced, meanwhile, the overall flatness of the heat exchange part 31 is also improved, the contact area between the battery 1 and the heat exchange part 31 is ensured, and the thermal resistance between the battery 1 and the heat exchange part 31 is reduced.

Optionally, after the welding of the heat exchange assembly 3 is completed, the welding of the box body 2 and the heat exchange assembly 3 is performed, so that the processing difficulty is reduced.

Of course, the whole heat exchange assembly 3 may be welded in a welding furnace, or the whole heat exchange assembly 3 may be welded outside the welding furnace by a device such as a mechanical arm.

It will be appreciated that the base plate 30 has channels provided therein for the flow of liquid. And a bottom plate 30 closes one end of the case 2 to define the case 2 together with the side plates 20.

As shown in fig. 4, according to some embodiments of the present application, optionally, the heat exchanging part 31 includes: a first current collecting portion 311, a second current collecting portion 312, and a plurality of first channels 313.

Specifically, the first collecting portion 311 extends in the first direction of the case 2 and communicates with the water inlet 310; the second current collecting portion 312 extends along the first direction, the second current collecting portion 312 is disposed opposite to the first current collecting portion 311, and the second current collecting portion 312 communicates with the bottom plate 30; the plurality of first passages 313 extend in the second direction of the case 2, and the first passages 313 communicate between the first and second current collecting parts 311 and 312.

In this embodiment, the heat exchanging part 31 includes a first current collecting part 311, a second current collecting part 312, and a plurality of first channels 313, the first current collecting part 311 and the second current collecting part 312 are disposed opposite to each other and each extend along a first direction, the plurality of first channels 313 are disposed between the first current collecting part 311 and the second current collecting part 312 along a second direction, and the plurality of first channels 313 are connected with the first current collecting part 311 and the second current collecting part 312, so that the liquid can flow into the first channels 313 through the water inlet 310 after entering the first current collecting part 311, then flows into the second current collecting part 312 through the plurality of first channels 313, flows into the bottom plate 30 after being collected in the second current collecting part 312, and realizes the heat exchange between the cooling liquid and the battery 1.

Optionally, a plurality of sub-channels are included within any one of the first channels 313. Specifically, at least some of the sub-channels differ in flow area.

As shown in fig. 4 and 5, according to some embodiments of the present application, optionally, the heat exchanging part 31 further includes: header 314. Specifically, the header 314 extends along the third direction of the case 2, and when the number of the heat exchanging portions 31 is plural, the plural heat exchanging portions 31 are arranged at intervals along the third direction, the header 314 communicates with the first collecting portion 311 of the plural heat exchanging portions 31, and the water inlet 310 is provided to the header 314.

In this embodiment, the heat exchange portion 31 further includes a header 314, the water inlet 310 is disposed on the header 314, the header 314 extends along the third direction, under the condition that the number of the heat exchange portions 31 is multiple, the multiple heat exchange portions 31 are disposed at intervals along the third direction, the header 314 is communicated with the first collecting portions 311 of the multiple heat exchange portions 31, so that after the cooling liquid enters the header 314 from the water inlet 310, the cooling liquid can flow into the multiple heat exchange portions 31, heat exchange between the heat exchange portions 31 and the battery 1 is achieved, and the heat exchange effect is improved.

As shown in fig. 1 and 3, according to some embodiments of the present application, optionally, both sides of either mounting cavity 32 are provided with heat exchanging portions 31.

In this embodiment, the heat exchange portions 31 are disposed on two sides of any mounting cavity 32, so that two sides of the battery 1 in any mounting cavity 32 can be in contact with the heat exchange portions 31, and the bottom of the battery 1 can be in contact with the bottom plate 30, thereby realizing three-side heat exchange of the battery 1 and further improving the heat dissipation effect of the battery 1.

As shown in fig. 3, 7 and 8, optionally, in a first direction, a plurality of first channels 313 have a predetermined spacing from the bottom plate 30 according to some embodiments of the present application; and/or, the plurality of first passages 313 are provided with a predetermined interval from the top wall of the cabinet 2 opposite to the bottom plate 30.

In this embodiment, preset intervals are set between the plurality of first channels 313 and the bottom plate 30, and/or preset intervals are set between the plurality of first channels 313 and the top wall of the bottom plate 30 corresponding to the case 2, so that on one hand, the contact area between the side surface of the battery 1 and the heat exchange portion 31 is reduced, and then the contact areas between the bottom of the battery 1 and the side portion of the battery 1 and the cooling liquid are balanced, the temperature difference between each portion of the battery 1 is reduced, and the uniformity of cooling of each portion of the battery 1 is improved. On the other hand, the heat dissipation at the bottom of the battery 1 can be increased, so that the number of the first channels 313 is reduced, and the first channels 313 are located in the middle section of the case 2, and only occupy part of the height of the case 2, so that the welding height of the first channels 313 and the first and second current collecting parts 311 and 312 is reduced.

In a specific application, the uniformity of the temperatures of different batteries 1 can be improved to 3 ℃, that is, the uniformity of the temperatures of the batteries 1 is less than or equal to 3 ℃, so that the temperatures of all parts of the batteries 1 are more uniform, and the performance of the batteries 1 is improved.

Specifically, the sum of the contact areas of the side walls of the both sides of the battery 1 and the heat exchanging portion 31 is approximately equal to the contact area of the bottom of the battery 1 and the bottom plate 30.

Optionally, according to some embodiments of the present application, the second header 312 is connected to the bottom plate 30 by brazing.

In this embodiment, the second current collecting portion 312 is connected to the bottom plate 30 by brazing, specifically, the second current collecting portion 312 and the bottom plate 30 are brazed by using a mechanical arm, and welding in a brazing furnace is not needed, so that the processing difficulty is reduced, the flatness of the first channel 313 after welding is ensured, and the thermal resistance between the first channel 313 and the battery 1 is reduced.

Specifically, the second current collecting portion 312 and the bottom plate 30 are welded by the robot arm outside the brazing furnace, so that the height of welding in the brazing furnace in the subsequent step can be reduced, and thus the manufacturing can be performed using a general-purpose welding furnace.

Optionally, according to some embodiments of the present application, the first channel 313, the first current collector 311, and the second current collector 312 are connected by brazing.

In this embodiment, the first channel 313, the first current collecting portion 311 and the second current collecting portion 312 are connected by brazing, specifically, the first channel 313, the first current collecting portion 311 and the second current collecting portion 312 are integrally brazed without material by using a brazing furnace, and fixation and conduction of the first current collecting portion 311, the second current collecting portion 312 and the first channel 313 are achieved. Meanwhile, the welding height is reduced, so that the universal brazing furnace can realize welding.

It will be appreciated that in the embodiments presented herein, the first channel 313, the first header 311 and the second header 312 are welded in a brazing furnace, i.e. the heat exchanger 31 is welded in a brazing furnace. The second mass flow portion 312 passes through the arm welding in the brazing furnace outside with the bottom plate 30, namely, the connection between heat transfer portion 31 and the bottom plate 30 is realized in the brazing furnace outside for a plurality of parts of energy memory separate welding has reduced energy memory's box 2 and heat transfer portion 31's integrated level, compares in box 2 and heat transfer portion 31 as an organic whole in the mode of brazing furnace welded, and the welding height of this application reduces, and then uses general welding furnace to make, has reduced the processing degree of difficulty.

Optionally, according to some embodiments of the present application, the second current collector 312 is connected to the base plate 30 by a joint.

In this embodiment, a joint may be provided at the connection between the second current collecting portion 312 and the bottom plate 30, so as to better achieve communication between the two.

Optionally, according to some embodiments of the present application, a seal is provided at the junction between the second header 312 and the bottom plate 30.

In this embodiment, the sealing member is disposed at the connection position between the second current collecting portion 312 and the bottom plate 30, so that the connection position between the second current collecting portion 312 and the bottom plate 30 can be sealed, leakage of liquid at the connection position between the second current collecting portion 312 and the bottom plate 30 is avoided, and reliability of the energy storage device is improved.

As shown in fig. 4, 6 and 9, the base plate 30 optionally includes: a third current collector 301, a fourth current collector 302, and a plurality of second channels 303.

Specifically, the third current collecting portion 301 extends in the third direction of the case 2, and the third current collecting portion 301 communicates with the second current collecting portion 312; the fourth current collecting part 302 extends along the third direction, the fourth current collecting part 302 is arranged opposite to the third current collecting part 301, and the fourth current collecting part 302 is communicated with the water outlet 300; a plurality of second channels 303 are connected between the third current collecting portion 301 and the fourth current collecting portion 302, and the second channels 303 are disposed corresponding to the mounting cavities 32.

In this embodiment, the bottom plate 30 includes a third current collecting portion 301, a fourth current collecting portion 302, and a plurality of second channels 303, each of the third current collecting portion 301 and the fourth current collecting portion 302 extending in a third direction, the plurality of second channels 303 being disposed between the third current collecting portion 301 and the fourth current collecting portion 302 in a second direction, and the plurality of second channels 303 being in communication with the third current collecting portion 301 and the fourth current collecting portion 302 such that the cooling liquid flows from the second current collecting portion 312 of the heat exchanging portion 31 to the third current collecting portion 301 of the bottom plate 30 and then to the plurality of second channels 303, and then from the fourth current collecting portion 302 to the water outlet 300 after heat exchange with the battery 1 is achieved. The second channel 303 is disposed corresponding to the mounting cavity 32, so that the battery 1 in the mounting cavity 32 contacts with the second channel 303, thereby realizing heat dissipation of the battery 1 and improving the heat dissipation effect of the battery 1.

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

As shown in fig. 1 and 2, according to some embodiments of the present application, optionally, the case 2 includes: a side plate 20. The side plate 20 is arranged around the bottom plate 30, and the water outlet 300 is arranged on one side of the side plate 20 away from the mounting cavity 32.

In this embodiment, the case 2 further comprises a side plate 20, the side plate 20 is arranged around the bottom plate 30 and connected to the bottom plate 30, wherein the water outlet 300 extends through the side plate 20 to a side of the side plate 20 facing away from the mounting cavity 32, so as to facilitate connection of the water outlet 300 to an external water source.

In a particular 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.

As shown in fig. 1 and 2, according to some embodiments of the present application, optionally, the number of the batteries 1 is plural, and at least one row of the batteries 1 is disposed in any one of the mounting cavities 32.

In this embodiment, the number of the batteries 1 is plural, and the amount of stored electricity of the energy storage device is increased. In any of the installation cavities 32, the batteries 1 are arranged in at least one row, so that the contact area between the batteries 1 and the heat exchange part 31 as well as the bottom plate 30 is increased, and the heat exchange effect is further improved.

In a specific application, a row of batteries 1 is disposed in any one of the mounting cavities 32 to achieve at least three-sided cooling of the batteries 1.

According to some embodiments of the present application, alternatively, the cells 1 are arranged in a plurality of rows in the thickness direction, or the cells 1 are arranged in a plurality of rows in the width direction.

In this embodiment, the cells 1 may be arranged in a plurality of rows in the thickness direction, and both narrow sides of the cells 1 are cooled by the heat exchanging part 31; the cells 1 may be arranged in a plurality of rows in the width direction, and the heat exchange portion 31 cools both wide surfaces of the cells 1, thereby accelerating heat dissipation to the cells 1.

According to some embodiments of the present application, optionally, the connection between the battery 1 and the heat exchanging part 31 and/or the connection between the battery 1 and the case 2 is through a heat conducting member.

In this embodiment, the battery 1 is connected with the heat exchange portion 31 and/or the battery 1 is connected with the box 2 through the heat conducting member, so that the heat conducting effect between the battery 1 and the heat exchange portion 31 and between the battery 1 and the box 2 is improved, the heat dissipation effect is improved while the battery 1 is fixed, the use of other structural members is reduced, and the cost of the whole power supply device is reduced.

In a specific application, the thermally conductive member comprises a thermally conductive structural adhesive.

According to some embodiments of the present application, optionally, the number of the water inlets 310 and the water outlets 300 is plural, the plurality of water inlets 310 are symmetrically arranged along the second direction of the tank 2, and the plurality of water outlets 300 are symmetrically arranged along the second direction of the tank 2.

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

Optionally, in a third direction, the water inlet 310 is located above the water outlet 300.

In a specific application, the first channel 313 is a microchannel. The first current collector 311 is a front current collector, and the second current collector 312 is a rear current collector. The battery 1 comprises an electrical core and the energy storage device comprises a battery pack.

According to the energy storage device, the integration level is reduced, and the welding height is reduced from 220mm to 120mm, so that the universal welding furnace can be used for manufacturing products; the temperature uniformity of different cells is improved from 5 degrees to 3 degrees; the flatness of the micro-channel caused by welding is reduced from 2mm to 1mm, so that the thermal resistance between the micro-channel and the battery cell can be reduced.

The micro-channel and the current collector (the front current collector and the rear current collector) are integrally brazed without materials by adopting a brazing furnace; the current collector and stamped base plate 30 are brazed using a robotic arm.

Fig. 9 shows a waterway flow schematic: the waterway of the whole energy storage device is divided into a left symmetrical inlet and a right symmetrical outlet, when water flows into the front current collector from the water inlet 310, the water enters the micro-channels through 9 different sectional areas, then flows into the bottom plate 30 from the rear current collector, and finally flows to the water outlet 300 through the bottom plate 30.

Alternatively, the microchannels are 3-series aluminum, facilitating profile extrusion.

Optionally, a heat conducting structural adhesive is filled and sealed between the battery cell and the micro-channel, the bottom plate 30 and the side wall.

Alternatively, the design of high integration between the microchannels and the bottom plate 30, front current collector, rear current collector; when liquid enters different micro-channels, the cross section of the micro-channels needs to be shielded according to different proportions. The flow channels integrated in the bottom plate 30 are made by stamping the sheet material, combining brazing, blowing up, etc.

Alternatively, the front and rear current collectors may be welded to the bottom plate 30, or a rubber sealing mechanism may be used.

Alternatively, the micro-channels are divided into two or more micro-channel combinations.

Alternatively, the microchannels and the bottom plate 30 are connected using piping joints.

In the present utility model, the term "plurality" means two or more, unless explicitly defined otherwise. The terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present specification, the terms "one embodiment," "some embodiments," "particular embodiments," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

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

Claims (10)

1. An energy storage device, comprising:

a battery;

a case;

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 arranged in the box body and surrounds at least two mounting cavities with the bottom plate and the box body, the battery is arranged in the mounting cavities,

the heat exchange device comprises a bottom plate, a heat exchange part and a water inlet, wherein one end of the heat exchange part is provided with the water inlet, the other end of the heat exchange part is communicated with the bottom plate, and one end of the bottom plate, which is close to the water inlet, is provided with the water outlet.

2. The energy storage device of claim 1, wherein the heat exchange portion comprises:

a first current collecting part extending along a first direction of the tank body and communicating with the water inlet;

a second current collecting portion extending in the first direction, the second current collecting portion being disposed opposite to the first current collecting portion, the second current collecting portion being in communication with the base plate;

and the first channels extend along the second direction of the box body and are communicated between the first current collecting part and the second current collecting part.

3. The energy storage device of claim 2, wherein the heat exchange portion further comprises:

and the collecting pipe extends along the third direction of the box body, under the condition that the number of the heat exchange parts is multiple, the multiple heat exchange parts are arranged at intervals along the third direction, the collecting pipe is communicated with the multiple first collecting parts of the heat exchange parts, and the water inlet is formed in the collecting pipe.

4. An energy storage device according to claim 3, wherein the heat exchange portions are provided on both sides of any one of the mounting cavities.

5. The energy storage device of claim 2, wherein the energy storage device comprises a housing,

in the first direction, a preset interval is arranged between the plurality of first channels and the bottom plate; and/or

The first channels are spaced apart from the top wall of the case opposite to the bottom plate by predetermined intervals.

6. The energy storage device of claim 2, wherein the energy storage device comprises a housing,

the second current collecting part is connected with the bottom plate through 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 of claim 2, wherein the energy storage device comprises a housing,

the second current collecting part is connected with the bottom plate through a joint; or (b)

And a sealing piece is arranged at the joint between the second current collecting part and the bottom plate.

8. The energy storage device of claim 2, wherein the base plate comprises:

a third current collecting portion extending in a third direction of the case, the third current collecting portion communicating with the second current collecting portion;

the fourth current collecting part extends along the third direction, the fourth current collecting part is arranged opposite to the third current collecting part, and the fourth current collecting part is communicated with the water outlet;

the second channels are communicated between the third current collecting part and the fourth current collecting part, and the second channels are arranged corresponding to the mounting cavities.

9. The energy storage device of any one of claims 1 to 8, wherein the housing comprises:

the side plate is arranged around the bottom plate in a surrounding mode, and the water outlet is arranged on one side, away from the mounting cavity, of the side plate.

10. The energy storage device of any one of claims 1 to 8, wherein the number of cells is plural, and at least one row of cells is provided in any one of the mounting cavities;

the battery is connected with the heat exchange part and/or the battery is connected with the box body through a heat conduction piece.