CN220324530U

CN220324530U - Energy storage device

Info

Publication number: CN220324530U
Application number: CN202321478445.1U
Authority: CN
Inventors: 李华君; 郭自德; 卢艳华; 余东旭
Original assignee: Ningde Times Future Energy Shanghai Research Institute Co ltd; Contemporary Amperex Technology Co Ltd
Current assignee: Ningde Times Future Energy Shanghai Research Institute Co ltd; Contemporary Amperex Technology Co Ltd
Priority date: 2023-06-09
Filing date: 2023-06-09
Publication date: 2024-01-09
Anticipated expiration: 2033-06-09

Abstract

The application relates to an energy storage device, the energy storage device includes: an energy storage device body having a cooling passage for circulating a cooling liquid therein; a cooling pipe structure including a water pipe joint for communicating with the cooling passage, the water pipe joint being capable of supplying a cooling liquid to the cooling passage; the water pipe connector is located on the outer side of the energy storage device body in the length direction or the width direction. The utility model provides an energy memory through setting up the water pipe head of cooling line structure in the outside of energy memory body along length direction or width direction for the water pipe head is not in the upper portion or the inner structure of energy memory body, and when water pipe head seepage coolant liquid, the coolant liquid of water pipe head seepage can direct drip to the bottom outside of energy memory body, and can not drip on the structural component of energy memory body, also can not contact with the inside electrical component of energy memory body, improves the holistic insulating reliability of energy memory.

Description

Energy storage device

Technical Field

The application relates to the technical field of high-voltage direct-hanging energy storage, in particular to an energy storage device.

Background

The high-pressure energy storage device is usually arranged in the valve tower, and in the operation process of the energy storage device, a large amount of heat can be generated by electric elements such as a power module, a battery and the like in the energy storage device, and a cooling system is required to be arranged for radiating the heating equipment.

In the related art, a cooling system of an energy storage device is provided with a relatively complex cooling pipeline and a large number of water pipe joints, and as the energy storage device is applied to a high-pressure environment, a large number of electrical elements are arranged inside the energy storage device, when the cooling pipeline leaks water, the electrical elements inside the energy storage device are easily damaged or lose efficacy, the insulation reliability of the energy storage device is also affected, and even safety accidents are caused.

Disclosure of Invention

The present application aims to solve at least one of the technical problems existing in the prior art. For this reason, this application provides an energy memory, can reduce the risk that the inside electrical component of energy memory damages or becomes invalid because of water pipe head seepage coolant liquid leads to, improves the holistic insulating reliability of energy memory.

The application provides an energy storage device, the energy storage device includes:

an energy storage device body having a cooling passage for circulating a cooling liquid therein;

a cooling pipe structure including a water pipe joint for communicating with the cooling passage, the water pipe joint being capable of supplying a cooling liquid to the cooling passage;

the water pipe connector is located on the outer side of the energy storage device body in the length direction or the width direction.

The energy storage device has at least the following beneficial effects:

the utility model provides an energy memory through setting up the water pipe head on the cooling line structure in the outside of energy memory body along length direction or width direction for the water pipe head is not in the upper portion or the inner structure of energy memory body, and when water pipe head seepage coolant liquid, the coolant liquid of water pipe head seepage can direct drip to the bottom outside of energy memory body, and can not drip on the structural component of energy memory body, also can not contact with the inside electrical component of energy memory body, effectively reduces the risk that the inside electrical component of energy memory body damages or becomes invalid because of water pipe head seepage coolant liquid leads to, improves the holistic insulating reliability of energy memory.

In some embodiments, the energy storage device further comprises a water collecting disc arranged at the bottom of the energy storage device body.

Therefore, the water collecting disc realizes the confluence and collection of the cooling liquid leaked by the water pipe connector, so that the safety accidents caused by the direct dripping of the cooling liquid on the ground and the flowing diffusion to the body of the energy storage device are avoided, the insulation reliability of the energy storage device is further improved, and meanwhile, the cooling liquid leaked by the water pipe connector is convenient to clean in a concentrated mode.

In some embodiments, the cooling pipeline structure further comprises a circulating pipeline for circulating cooling liquid, the circulating pipeline is surrounded along the outer circumference of the energy storage device body, and the circulating pipeline is communicated with the cooling passage inside the energy storage device body through the water pipe connector.

Therefore, the cooling liquid in the circulating pipeline flows into or flows out of the cooling passage inside the energy storage device body through the corresponding water pipe connector, and the cooling liquid can take away heat generated in the working process of the electric element inside the energy storage device body along the circulating pipeline, the water pipe connector and the cooling passage inside the energy storage device body, so that the cooling and radiating effects on the energy storage device body are realized.

In some embodiments, the perpendicular projection of the circulation duct with respect to the water collection tray is not coincident with the perpendicular projection of the energy storage device body with respect to the water collection tray.

Therefore, when the outer wall of the circulating pipeline is subjected to heat exchange with the outside air, condensed water or cooling liquid leaks from the outer wall of the circulating pipeline, the condensed water or cooling liquid can also directly drip into the water collecting tray at the bottom of the energy storage device body, and cannot drip onto structural components of each layer of the energy storage device body or contact with electric elements of each layer of the energy storage device body, so that the risk that the electric elements are damaged or fail due to the fact that the cooling liquid leaked from the circulating pipeline or the appeared condensed water directly drip into the electric elements inside the energy storage device body is reduced, and the overall insulation reliability of the energy storage device is improved.

In some embodiments, the energy storage device body includes a plurality of energy storage layers disposed in a height direction, each of the energy storage layers having at least one of the cooling passages inside;

the circulating pipeline comprises a main circulating pipeline and a plurality of sections of sub circulating pipelines communicated with the main circulating pipeline, the sub circulating pipelines are communicated with the cooling passage corresponding to the energy storage layer through water pipe connectors, and the plurality of sections of sub circulating pipelines are arranged in parallel.

Therefore, the main circulation pipeline supplies cooling liquid to each section of sub circulation pipeline, and each section of sub circulation pipeline supplies cooling liquid to the cooling passage inside the corresponding energy storage layer, so that each energy storage layer is provided with an independent cooling pipeline for cooling and radiating electric elements in the energy storage layer, and the overall radiating efficiency of the energy storage device body is improved.

In some embodiments, the water connection includes a water inlet connection and a water outlet connection outside the energy storage layer;

the sub-circulation pipeline comprises a sub-water inlet pipeline and a sub-water outlet pipeline which are distributed at intervals along the height direction of the energy storage layer, and the sub-water inlet pipeline and the sub-water outlet pipeline are communicated with the cooling passage inside the energy storage layer through the water inlet joint and the water outlet joint respectively.

Therefore, the cooling liquid of the sub water inlet pipeline flows into each cooling passage through each water inlet joint and flows out from each water outlet joint to the sub water inlet pipeline, so that the circulation flow of the cooling liquid of each cooling passage is relatively independent, the cooling heat dissipation efficiency of each cooling passage on the corresponding electric element is improved, and meanwhile, the independent monitoring of each cooling passage in the energy storage layer is also facilitated.

In some embodiments, the main circulation pipeline comprises a main water inlet pipeline and a main water outlet pipeline which are distributed at intervals along the length direction or the width direction of the energy storage device body, all the sub water inlet pipelines are communicated in parallel through the main water inlet pipeline, and all the sub water outlet pipelines are communicated in parallel through the main water outlet pipeline.

Therefore, the water inlet pipes of the sub-water inlet pipes and the water outlet pipes of the sub-water outlet pipes are independent, so that the flow of the cooling liquid of the water inlet pipes of the sub-water inlet pipes, the cooling passages of the sub-water outlet pipes and the main water outlet pipes of the sub-water outlet pipes is more uniform, the heat dissipation efficiency of the energy storage layers is improved, and the heat dissipation and cooling efficiency of the whole energy storage device body is further improved.

In some embodiments, the main circulation pipe is configured as an insulating pipe, the sub-circulation pipe is configured as a conductive pipe, and the sub-circulation pipe is connected to a portion of the energy storage layer.

Therefore, the electric insulation requirements among different sub-circulation pipelines are effectively guaranteed, meanwhile, each energy storage layer and the corresponding sub-circulation pipeline are reliably connected in an equipotential mode, and the overall electric reliability of each energy storage layer and the energy storage device body is improved.

In some embodiments, the water pipe joint and the outer side of the sub-circulation pipeline are both surrounded by a shielding cover.

Therefore, the shielding cover can effectively eliminate electromagnetic interference of the external environment, can effectively avoid partial discharge at the connection position of the water pipe connector and the sub-circulation pipeline, and improves the overall electrical reliability of the energy storage device body.

In some embodiments, the energy storage layer comprises an electric cabinet and a main control box, wherein the main control box is arranged on the outer side of the electric cabinet and is electrically connected with the electric cabinet, and the outer side of the electric cabinet along the length direction or the width direction is provided with a water pipe joint communicated with the cooling passage inside the electric cabinet.

Therefore, when the cooling liquid leaks in the electric cabinet, the electric elements in the main control box cannot be affected, and the safety performance of the main control box is improved.

In some embodiments, the main control box is arranged at the top of the electric cabinet, and a first waterproof cover is arranged at the top of the main control box.

Therefore, when the energy storage layer of the upper structure permeates the cooling liquid or the condensed water appears in the circulating pipeline, the cooling liquid or the condensed water can drop on the first waterproof cover and flow to the water collecting disc at the bottom along the first waterproof cover, and the damage or the failure of the electric element of the main control box or the electric cabinet caused by the direct drop of the cooling liquid or the condensed water to the main control box or the electric cabinet is effectively avoided.

In some embodiments, a sealing structure is arranged at the joint of the electric cabinet and the water pipe joint.

Therefore, leakage cooling liquid can not occur at the pipeline interface between the electric cabinet and the water pipe connector through the sealing structure, and the sealing and waterproof performance of the electric cabinet are improved.

In some embodiments, the energy storage layer further comprises a power module having a water connection on an outer side in a length direction or a width direction in communication with the cooling passage inside the power module.

Therefore, when the water pipe connector leaks the cooling liquid, the cooling liquid can directly drip into the water collecting disc at the bottom and can not drip or flow onto the electric element of the energy storage layer below, so that the insulation reliability of each power module is improved.

In some embodiments, a second waterproof cover is arranged at the top of the power module, and a drainage disc is arranged at the bottom of the power module and used for collecting leaked cooling liquid and guiding the cooling liquid to the water collecting disc.

Therefore, when the energy storage layer of the upper structure permeates the cooling liquid or the condensed water appears in the circulating pipeline, the cooling liquid or the condensed water can drip and collect on the second waterproof cover, so that the damage or failure of electric elements on the power module caused by the direct dripping of the cooling liquid or the condensed water onto the power module is effectively avoided, and the top leakage prevention function of the power module is ensured.

When the inside seepage coolant liquid of power module, the coolant liquid can collect the drainage dish and flow to the water collecting tray of energy memory body bottom along the drainage dish, further improves the holistic insulating reliability of energy memory.

In some embodiments, the energy storage layer further comprises a junction box, and a third waterproof cover is arranged on the top of the junction box.

Therefore, the third waterproof cover can concentrate and collect the cooling liquid which leaks out from the upper structure of the converging cabinet, and the leakage-proof function of the converging cabinet is guaranteed.

The foregoing description is only an overview of the technical solutions of the present application, and may be implemented according to the content of the specification in order to make the technical means of the present application more clearly understood, and in order to make the above-mentioned and other objects, features and advantages of the present application more clearly understood, the following detailed description of the present application will be given.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to designate like parts throughout the accompanying drawings. In the drawings:

fig. 1 is a schematic structural diagram of an energy storage device according to an embodiment of the present application.

Fig. 2 is a partial enlarged view at a in fig. 1.

Fig. 3 is a schematic structural diagram of an energy storage layer according to an embodiment of the present application.

Fig. 4 is a partial enlarged view at B in fig. 3.

Fig. 5 is a partial enlarged view at B1 in fig. 4.

Fig. 6 is a partial enlarged view at B2 in fig. 4.

Fig. 7 is a partial enlarged view at C in fig. 3.

Fig. 8 is a partial enlarged view at D in fig. 3.

Fig. 9 is a schematic diagram of a matching structure of an energy storage layer and a shielding case in an embodiment of the present application.

Reference numerals illustrate: an energy storage device body 10; an energy storage layer 11; an electric cabinet 111; a first outlet 1111; a flange 1112; a first watertight joint 1113; a master control box 112; a first waterproof cover 1121; a power module 113; a second waterproof cover 1131; a drain pan 1132; a convergence cabinet 114; a third waterproof cover 1141; a second outlet 1142; a second waterproof joint 1143; a tower 12; an insulator 13; a circulation duct 20; a main circulation pipe 21; a main water intake pipe 211; a main water outlet conduit 212; a sub-circulation pipe 22; a sub-water inlet pipe 221; a sub-outlet conduit 222; a water pipe joint 30; a water inlet joint 31; a water outlet joint 32; a water collecting tray 40; a shield 50; a length direction X; a width direction Y; the height direction Z.

Detailed Description

In order to make the above objects, features and advantages of the present application more comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is, however, susceptible of embodiment in many other forms than those described herein and similar modifications can be made by those skilled in the art without departing from the spirit of the application, and therefore the application is not to be limited to the specific embodiments disclosed below.

In the description of the present application, it should be understood that, if there are terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., these terms refer to the orientation or positional relationship based on the drawings, which are merely for convenience of description and simplification of description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, if any, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the terms "plurality" and "a plurality" if any, mean at least two, such as two, three, etc., unless specifically defined otherwise.

In this application, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly. For example, the two parts can be fixedly connected, detachably connected or integrated; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

In this application, unless expressly stated or limited otherwise, the meaning of a first feature being "on" or "off" a second feature, and the like, is that the first and second features are either in direct contact or in indirect contact through an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that if an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. If an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein, if any, are for descriptive purposes only and do not represent a unique embodiment.

In the related art, a cooling system of an energy storage device is provided with a relatively complex cooling pipeline and a large number of water pipe joints, and in the operation process of the energy storage device, a cooling water pipe and the water pipe joints of the cooling system can leak cooling water, and the inventor finds that the water pipe joints are the parts of the cooling system which are most prone to leak cooling water. Because the energy storage device is applied in a high-voltage environment, a large number of electrical elements are arranged in the energy storage device, when the water pipe joint leaks, the electrical elements in the energy storage device are easy to damage or lose efficacy, the insulation reliability of the energy storage device is also influenced, and even safety accidents are caused.

With reference to fig. 1 and 2, the application provides an energy storage device, which includes an energy storage device body 10 and a cooling pipeline structure.

The energy storage device body 10 has a cooling passage through which a cooling liquid flows. The cooling pipe structure is used for dissipating heat from the energy storage device body 10. The cooling line structure includes a water pipe joint 30 for communicating with the cooling passage, the water pipe joint 30 being capable of supplying the cooling passage with a cooling liquid. The water pipe joint 30 is located outside the energy storage device body 10 in the length direction X or the width direction Y.

The cooling liquid may be cooling water or other liquid cooling medium.

It should be noted that the energy storage device body 10 has at least one energy storage layer 11, and electrical components such as an electrical cabinet, a power module, a main control box, and a bus bar are mounted on each energy storage layer 11. It should be understood that the cooling passages inside the energy storage device body 10 correspond to the cooling passages inside the electric cabinet and the functional module, i.e. a plurality of cooling passages are provided inside the energy storage device body 10.

Correspondingly, the water pipe joint 30 has a plurality. For example, an external cooling water source or cold water pipe is connected to the cooling passage of the power cabinet through two water pipe joints 30, and an external cooling water source or cold water pipe is connected to the cooling passage of the power module through two water pipe joints 30. The cooling fluid in the external cooling water source or cold water pipe flows into or out of the cooling passage inside the energy storage device body 10 through the corresponding water connection 30. The circulation flow of the cooling liquid can take away the heat generated in the working process of the electric elements inside the energy storage device body 10, so as to realize the cooling and heat dissipation effects on the energy storage device body 10.

According to the energy storage device, the water pipe connector 30 on the cooling pipeline structure is arranged on the outer side of the energy storage device body 10 along the length direction X or the width direction Y, so that the water pipe connector 30 is not arranged on the upper portion or the inner structure of the energy storage device body 10, when the water pipe connector 30 leaks cooling liquid, the cooling liquid leaked by the water pipe connector 30 can directly drip to the outer side of the bottom of the energy storage device body 10, and cannot drip on the structural component of the energy storage device body 10, and cannot contact with the electrical element of the energy storage device body 10, the risk that the electrical element inside the energy storage device body 10 is damaged or fails due to the leakage cooling liquid of the water pipe connector is effectively reduced, and the overall insulation reliability of the energy storage device is improved.

In some embodiments of the present application, referring to fig. 1, the energy storage device further includes a water collecting tray 40 disposed at the bottom of the energy storage device body 10, and the water collecting tray 40 is used for collecting the coolant leaked from the water pipe joint 30.

It is to be understood that when the water pipe connector 30 on the cooling pipeline structure leaks cooling liquid, the cooling liquid can drop into the water collecting disc 40 at the bottom of the energy storage device body 10, so that the cooling liquid leaked by the water pipe connector 30 is converged and collected, the safety accident caused by the direct drop of the cooling liquid on the ground and the flowing diffusion to the energy storage device body 10 is avoided, the insulation reliability of the energy storage device is further improved, and meanwhile, the cooling liquid leaked by the water pipe connector 30 is conveniently and intensively cleaned.

Furthermore, referring to fig. 1, in some embodiments of the present application, the vertical projection of all water connections 30 with respect to the water collection tray 40 is located inside the water collection tray 40, and the projection of all water connections 30 in the vertical direction does not coincide with the projection of the energy storage device body 10 in the vertical direction. That is, the size range of the water collecting tray 40 can cover the projection of all the water pipe joints 30 in the vertical direction, so that when any one or more water pipe joints 30 in all the water pipe joints 30 leak cooling liquid, the water collecting tray 40 can collect the leaked cooling liquid.

Of course, in some embodiments of the present application, a corresponding water leakage detection mechanism may be disposed on the water collecting tray 40, where when the water collecting tray 40 receives the dropped cooling liquid, the water leakage detection mechanism detects the leakage of the water pipe connector 30, so as to report a leakage fault.

In some embodiments of the present application, referring to fig. 1 and 3, the cooling pipe structure further includes a circulation pipe 20 through which the cooling liquid flows, the circulation pipe 20 being circumferentially enclosed along an outer side of the energy storage device body 10, and the circulation pipe 20 communicating with a cooling passage inside the energy storage device body 10 through a water pipe joint 30.

Specifically, the energy storage device body 10 has a cylindrical structure. The circulation pipe 20 is in a net structure and is enveloped on the circumferential outer side of the energy storage device body 10, so that the flow area of the cooling liquid is increased, and the heat dissipation efficiency of the energy storage device body 10 is improved.

Through enclosing at energy storage device body 10 and establishing circulation pipeline 20, outside cooling water source can supply the coolant liquid to circulation pipeline 20, and the coolant liquid in the circulation pipeline 20 flows in or flows out in the inside cooling passage of energy storage device body 10 through corresponding water pipe head 30, and the coolant liquid can take away the heat that produces in the electrical components working process of energy storage device body 10 along circulation pipeline 20, water pipe head 30 and the inside cooling passage of energy storage device body 10, realizes the cooling radiating effect to energy storage device body 10.

In some embodiments of the present application, referring to fig. 1 and 3, the perpendicular projection of the circulation duct 20 with respect to the water collection tray 40 does not coincide with the perpendicular projection of the energy storage device body 10 with respect to the water collection tray 40. The water tray 40 can collect the cooling liquid dropped from the circulation duct 20.

The fact that the vertical projection of the circulation duct 20 with respect to the water collecting tray 40 is not coincident with the vertical projection of the energy storage device body 10 with respect to the water collecting tray 40 is understood to mean that the extending structure of the energy storage device body 10 in the height direction Z does not contact with the circulation duct 20.

So set up, when the outer wall of circulation pipeline 20 appears comdenstion water or the outer wall seepage coolant liquid of circulation pipeline 20 because of with outside air heat transfer, this comdenstion water or coolant liquid can direct drip in the water collecting tray 40 of energy storage device body 10 bottom equally, and can not drip on the structural component of energy storage device body 10, can not contact with the inside electrical component of energy storage device body 10 yet, thereby reduce the risk that leads to electrical component to damage or inefficacy because of the direct whereabouts of the coolant liquid of circulation pipeline 20 seepage or the inside electrical component of energy storage device body 10 of comdenstion water that appears, improve the holistic insulating reliability of energy storage device.

In some embodiments of the present application, referring to fig. 1 and 3, the energy storage device body 10 includes a plurality of energy storage layers 11 disposed in a height direction Z, each of the energy storage layers 11 having at least one cooling passage inside; the circulation pipeline 20 comprises a main circulation pipeline 21 and a plurality of sections of sub-circulation pipelines 22 communicated with the main circulation pipeline 21, the sub-circulation pipelines 22 are communicated with cooling passages of the corresponding energy storage layers 11 through water pipe joints 30, and the plurality of sections of sub-circulation pipelines 22 are arranged in parallel.

Specifically, referring to fig. 1 and 3, the energy storage device body 10 includes a tower 12, the tower 12 has a frame structure, a plurality of energy storage layers 11 are mounted on the tower 12 side by side along a height direction Z, and a water collecting tray 40 is disposed at the bottom of the tower 12. The adjacent two energy storage layers 11 are detachably connected through the insulator 13, so that the adjacent two energy storage layers 11 are mutually insulated and are not mutually interfered. In addition, the bottom energy storage layer 11 is detachably mounted on the water collecting disc 40 through the insulator 13, so that the insulation performance between the bottom energy storage layer 11 and the water collecting disc 40 is ensured.

It will be appreciated that the water connections 30 are located outside the tower 12 in either the length direction X or the width direction Y at corresponding locations of each energy storage layer 11. When the water pipe joint 30 leaks the cooling liquid, the cooling liquid can directly drip on the water collecting disc 40 at the bottom of the tower 10 and can not contact with the energy storage layer 11 and the electric elements on the energy storage layer 11, so that the leakage resistance and insulation safety performance of each energy storage layer 11 are improved, and the overall insulation reliability of the energy storage device is further improved.

Moreover, all the water pipe connectors 30 are arranged on the outer side of the tower 12 along the length direction X or the width direction Y, so that workers can conveniently and directly assemble and disassemble the water pipe connectors 30 on the outer side of the tower 12, and follow-up liquid leakage detection of an energy storage device is also facilitated.

Furthermore, it is to be understood that, in the energy storage device of the present application, the main circulation pipe 21 supplies the cooling liquid to each segment of the sub-circulation pipe 22, and each segment of the sub-circulation pipe 22 supplies the cooling liquid to the cooling passage inside the corresponding energy storage layer 11, so that each energy storage layer 11 has an independent cooling pipe to cool and dissipate heat of the electrical components inside the energy storage layer 11, thereby improving the heat dissipation efficiency of the whole energy storage device body 10.

Further, in some embodiments of the present application, referring to fig. 3 and 4, the water connection 30 includes a water inlet connection 31 and a water outlet connection 32 located outside the energy storage layer 11; the sub-circulation pipeline 22 comprises a sub-water inlet pipeline 221 and a sub-water outlet pipeline 222 which are distributed at intervals along the height direction Z of the energy storage layer 11, and the sub-water inlet pipeline 221 and the sub-water outlet pipeline 222 are respectively communicated with a cooling passage inside the energy storage layer 11 through a water inlet joint 31 and a water outlet joint 32.

Specifically, the water inlet joint 31 and the water outlet joint 32 are respectively disposed at the upper portion and the lower portion of the energy storage layer 11, and the water inlet joint 31 and the water outlet joint 32 are both protruding on the front side of the energy storage layer 11, so as to directly avoid the overlapping area between the projection of the water inlet joint 31 and the water outlet joint 32 in the vertical direction and the projection of the energy storage layer 11 in the vertical direction. In this way, when the water inlet joint 31 and/or the water outlet joint 32 leak the cooling liquid, the cooling liquid does not come into contact with the energy storage layer 11 and the electrical components on the energy storage layer 11.

In addition, the sub-water inlet pipeline 221 and the sub-water outlet pipeline 222 are annular pipelines, the sub-water inlet pipeline 221 surrounds the lower region of the energy storage layer 11, and the sub-water outlet pipeline 222 surrounds the upper region of the energy storage layer 11. Similarly, there is no overlapping area between the projections of the sub-water inlet pipe 221 and the sub-water outlet pipe 222 in the vertical direction and the projections of the energy storage layer 11 in the vertical direction. In this way, when condensate water or leaked cooling liquid appears at a certain position of the sub water inlet pipeline 221 and the sub water outlet pipeline 222, the condensate water or leaked cooling liquid does not drop onto the energy storage layer 11, but drops onto the water collecting tray 40 at the bottom, so that the probability that the condensate water or leaked cooling liquid contacts with the electrical element of the energy storage device body 10 is effectively reduced, the risk of damaging or failing the electrical element is reduced, and the overall insulation reliability of the energy storage device is improved.

Specifically, the sub water inlet pipeline 221 and the sub water outlet pipeline 222 can be formed by connecting a plurality of water pipes through flanges, so that the disassembly, the assembly and the replacement are convenient.

The energy storage layer 11 has a plurality of independent cooling passages therein, and the front side of the energy storage layer 11 is provided with a plurality of pairs of water inlet connectors 31 and water outlet connectors 32. Each section of sub water inlet pipeline 221 is connected with a plurality of water inlet joints 31 in parallel, and each section of sub water outlet pipeline 222 is connected with a plurality of water outlet joints 32 in parallel. It will be appreciated that the cooling liquid in the sub-water inlet pipe 221 flows into each cooling passage through each water inlet joint 31, and flows out from each water outlet joint 32 to the sub-water inlet pipe 221, so that the circulation flow of the cooling liquid in each cooling passage is relatively independent, the cooling efficiency of each cooling passage for cooling and radiating the corresponding electric element is improved, and meanwhile, the independent monitoring of each cooling passage in the energy storage layer 11 is also facilitated.

Further, in some embodiments of the present application, referring to fig. 1 and 3, the main circulation duct 21 includes a main water inlet duct 211 and a main water outlet duct 212 spaced apart along the length direction X or the width direction Y of the energy storage device body 10, all the sub water inlet ducts 221 are connected in parallel through the main water inlet duct 211, and all the sub water outlet ducts 222 are connected in parallel through the main water outlet duct 212.

Specifically, the main water inlet pipe 211 and the main water outlet pipe 212 may be disposed at opposite ends of the same side of the energy storage device body 10, such that the main water inlet pipe 211 and the main water outlet pipe 212 are relatively independent. The sub-water inlet pipe 221 may communicate with the main water inlet pipe 211 through a flange pipe, and the sub-water outlet pipe 222 may also communicate with the water outlet pipe 212 through a flange pipe.

It can be appreciated that through the above arrangement, each sub water inlet pipe 221 and each sub water outlet pipe 222 can be relatively independent, so that the coolant flow of each sub water inlet pipe 221, each cooling passage and each main water outlet pipe 212 is more uniform, the heat dissipation efficiency of each energy storage layer 11 is improved, and the overall heat dissipation and cooling efficiency of the energy storage device body 10 is further improved.

Of course, in other embodiments, the main circulation pipe 21 and the multi-segment sub-circulation pipe 22 may be circumferentially surrounded along the outer side of the energy storage device body 10 in a serial connection manner, that is, the circulation pipe 20 formed by the main circulation pipe 21 and the multi-segment sub-circulation pipe 22 is distributed on the outer side of the energy storage device body 10 in a meandering track, and the cooling liquid circulates along the circulation pipe 20 to realize heat dissipation and cooling of the energy storage device body 10.

In some embodiments of the present application, referring to fig. 1 and 3, the main circulation duct 21 is configured as an insulating duct, the sub-circulation duct 22 is configured as a conductive duct, and the sub-circulation duct 22 is connected to a portion of the energy storage layer 11.

Specifically, the main circulation pipe 21 may be formed of a plurality of sections of PVDF pipe (polyvinylidene fluoride pipe) butted by flanges, so that the sub-circulation pipe 22 has a good insulation performance and a good structural strength. The sub-circulation pipes 22 can be formed by butt-jointing a plurality of sections of metal pipes through flanges, so that the sub-circulation pipes 22 have better electric conductivity. In order to better fix the sub-circulation pipe 22, the sub-circulation pipe 22 is abutted against the outer portion of the energy storage layer 11 at the end position portion thereof.

It should be noted that, during the use of the energy storage device, the energy storage layers 11 on the energy storage device body 10 need to be kept in a relatively insulated state, and each part on each energy storage layer 11 needs to be kept in an equipotential state, so that the potentials of the energy storage layers 11 are different. Meanwhile, considering that the cooling liquid is mainly supplied to the cooling passages inside the energy storage layers 11 by surrounding the corresponding energy storage layers 11 through the respective sub-circulation pipes 22 and taking away the heat emitted from the energy storage layers 11, the main circulation pipe 21 is disposed at the outside of the energy storage device 10 to supply the cooling liquid to the respective sub-circulation pipes 22.

Based on the above, the main circulation pipeline 21 is configured as an insulation pipeline, the sub-circulation pipelines 22 are configured as conductive pipelines, so that the electrical insulation requirements among different sub-circulation pipelines 22 are effectively ensured, meanwhile, each energy storage layer 11 and the corresponding sub-circulation pipeline 22 thereof are reliably connected in an equipotential manner, and the overall electrical reliability of each energy storage layer 11 and the energy storage device body 10 is improved.

In addition, referring to fig. 9, in some embodiments of the present application, the outside of the water connection 30 and the sub-circulation duct 22 are surrounded by a shield 50.

It should be noted that, since all the water pipe connectors 30 and all the sub-circulation pipes 22 are metal conductive pipes, the shielding case 50 is enclosed on the outer sides of the water pipe connectors 30 and the sub-circulation pipes 22, the shielding case 50 can effectively eliminate electromagnetic interference of the external environment, and can effectively avoid partial discharge at the connection positions of the water pipe connectors 30 and the sub-circulation pipes 22, thereby improving the overall electrical reliability of the energy storage device body 10.

In some embodiments of the present application, referring to fig. 4, 5 and 6, the energy storage layer 11 includes an electric cabinet 111 and a main control box 112, the main control box 112 is disposed at an outer side of the electric cabinet 111 and electrically connected to the electric cabinet 111, and the electric cabinet 111 has a water pipe joint 30 communicating with a cooling passage inside the electric cabinet 111 at an outer side in a length direction X or a width direction Y.

Specifically, the water pipe connector 30 includes a water inlet connector 31 and a water outlet connector 32, the water inlet connector 31 is located at the front side of the electric cabinet 111, the water outlet connector 32 is in an L-shaped structure and is bent and led out from the top of the electric cabinet 111, and the water inlet connector 31 is connected with the water outlet connector 32 through a cooling passage inside the electric cabinet 111. In this way, the interfaces of the water inlet joint 31 and the water outlet joint 32 are all located outside the energy storage layer 11, and when the water inlet joint 31 and the water outlet joint 32 leak the cooling liquid, the cooling liquid can directly drip into the water collecting tray 40 at the bottom, and can not drip or flow onto the electrical elements of the energy storage layer 11 below, so that the insulation reliability of each electrical cabinet 111 is improved.

In addition, it should be noted that, by arranging the main control box 112 outside the electric cabinet 111, when the cooling liquid leaks inside the electric cabinet 111, the electric components inside the main control box 112 are not affected, and the safety performance of the main control box 112 is improved.

Further, referring to fig. 4 and 5, the main control box 112 is disposed at the top of the electric cabinet 111, and the top of the main control box 112 is provided with a first waterproof cover 1121.

Specifically, the first waterproof cover 1121 is covered on the main control box 112, and the first waterproof cover 1121 has a certain inclination angle with respect to the horizontal plane, and at the same time, the front side of the first waterproof cover 1121 may protrude from the front sides of the main control box 112 and the electric cabinet 111. So set up, when the energy storage layer 11 of superstructure permeates coolant liquid or the comdenstion water appears in circulation pipeline 20, coolant liquid or comdenstion water can drip on first buckler 1121 and converge to the water collecting tray 40 of bottom along first buckler 1121, effectively avoid coolant liquid or comdenstion water to drip directly to master control case 112 or electric cabinet 111 and cause the electric elements damage or the inefficacy of master control case 112 or electric cabinet 111.

Further, referring to fig. 4 and 5, a sealing structure is provided at the junction of the electric cabinet 111 and the water pipe joint 30.

Specifically, in each energy storage layer 11, the electric cabinets 111 are arranged in a plurality of side-by-side and spaced manner, and each electric cabinet 111 has a cooling passage therein. The electric cabinet 111 adopts a full-sealing structure, and the inside of the electric cabinet 111 keeps a micro-positive pressure state. The sealing structure comprises a flange 1112 and a sealing gasket, wherein the flange 1112 is welded on the electric cabinet 111 and is positioned at the butt joint position of the electric cabinet 111 and the water outlet joint 32, and the sealing gasket is locked on the electric cabinet 111 through a bolt and is positioned between the electric cabinet 111 and the flange 1112. Thus, leakage of cooling liquid can not occur at the pipeline interface between the electric cabinet 111 and the water outlet connector 32, and the sealing and waterproof performance of the electric cabinet 111 are improved. Likewise, the docking mode of the water inlet connector 31 and the electric cabinet 111 may also adopt a structure consistent with that of the water outlet connector 32, which will not be described again.

Further, in some embodiments, the top of the electrical cabinet 111 has a first outlet 1111, the first outlet 1111 for electrical connection with the main control box 112 via electrical wires. The first outlet 1111 is provided with a first waterproof connector 1113 to seal and protect the first outlet 1111, where the first waterproof connector 1113 may be a gram head, so as to improve the sealing performance and waterproof performance of the first outlet 1111.

In some embodiments of the present application, referring to fig. 3 and 7, the energy storage layer 11 further includes a power module 113, and the power module 113 has a water pipe joint 30 communicating with a cooling passage inside the power module 113 along an outer side of the length direction X or the width direction Y.

The power module 113 has a cooling passage, and the water pipe joint 30 includes a water inlet joint 31 and a water outlet joint 32 which are in communication with the cooling passage, and the water inlet joint 31 and the water outlet joint 32 are located at the front side of the power module 113. When the water inlet joint 31 and the water outlet joint 32 leak the cooling liquid, the cooling liquid may directly drip into the bottom water collecting tray 40 without dripping or flowing onto the electric components of the lower energy storage layer 11, thereby improving the insulation reliability of each power module 113.

Further, a second waterproof cover 1131 is disposed on the top of the power module 113, and a drainage tray 1132 is disposed on the bottom of the power module 113, where the drainage tray 1132 is used for collecting leaked cooling liquid and guiding the cooling liquid to the water collecting tray 40.

Specifically, the second waterproof cover 1131 is covered outside the power module 113, when the energy storage layer 11 of the upper structure permeates the cooling liquid or the condensed water appears in the circulating pipeline 20, the cooling liquid or the condensed water can drip and collect on the second waterproof cover 1131, so that damage or failure of electrical elements on the power module 113 caused by direct dripping of the cooling liquid or the condensed water on the power module 113 is effectively avoided, and the top leakage-proof function of the power module 113 is ensured.

In addition, the drainage tray 1132 is inclined at a certain angle relative to the horizontal plane, the front side of the drainage tray 1132 protrudes from the front sides of the main control box 112 and the electric cabinet 111, and the front end of the drainage tray 1132 is opposite to the water collecting tray 40 at the bottom of the energy storage device body 10 in the vertical direction. So set up, when the inside seepage coolant liquid of power module 113, the coolant liquid can collect drainage dish 1132 and flow to the water collecting tray 40 of energy storage device body 10 bottom along drainage dish 1132, further improves the holistic insulating reliability of energy storage device.

In addition, in some embodiments of the present application, referring to fig. 3 and 8, the energy storage layer 11 further includes a bus bar 114, and a third waterproof cover 1141 is provided on top of the bus bar 114.

It will be appreciated that the third waterproof cover 1141 can concentrate and collect the coolant leaking from the structure above the manifold 114, so as to ensure the leakage-proof function of the manifold 114.

In addition, the top of the bus cabinet 114 has a second outlet end 1142 for connecting with other electrical components of other energy storage layers 11, and a second waterproof connector 1143 is disposed on the second outlet end 1142 to seal and protect the second outlet end 1142, where the second waterproof connector 1143 may be a gram head, so as to improve the sealing performance and waterproof performance of the second outlet end 1142.

In some embodiments of the present application, the present application provides an energy storage device comprising an energy storage device body 10 having a cooling passage therein for circulation of a cooling liquid; a cooling pipe structure for radiating heat from the energy storage device body 10, including a water pipe joint 30 for communicating with a cooling passage, the water pipe joint 30 being capable of supplying a cooling liquid to the cooling passage; the water pipe connector 30 is located outside the energy storage device body 10 along the length direction X or the width direction Y.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the claims. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.

Claims

1. An energy storage device, comprising:

an energy storage device body (10) having a cooling passage for circulating a cooling liquid therein;

a cooling line structure comprising a water connection (30) for communicating with the cooling passage, the water connection (30) being capable of supplying a cooling liquid to the cooling passage;

wherein the water pipe joint (30) is positioned at the outer side of the energy storage device body (10) along the length direction (X) or the width direction (Y).

2. The energy storage device according to claim 1, further comprising a water collection tray (40) provided at the bottom of the energy storage device body (10).

3. The energy storage device according to claim 2, wherein the cooling pipe structure further comprises a circulation pipe (20) through which cooling liquid flows, the circulation pipe (20) being circumferentially enclosed along an outer side of the energy storage device body (10), the circulation pipe (20) being communicated with the cooling passage inside the energy storage device body (10) through the water pipe joint (30).

4. A storage device according to claim 3, characterized in that the vertical projection of the circulation duct (20) with respect to the water collection tray (40) does not coincide with the vertical projection of the storage device body (10) with respect to the water collection tray (40).

5. The energy storage device of claim 3, wherein the energy storage device comprises,

the energy storage device body (10) comprises a plurality of energy storage layers (11) arranged along the height direction (Z), and at least one cooling passage is formed in the energy storage layers (11);

the circulating pipeline (20) comprises a main circulating pipeline (21) and a plurality of sections of sub-circulating pipelines (22) communicated with the main circulating pipeline (21), the sub-circulating pipelines (22) are communicated with the cooling passage corresponding to the energy storage layer (11) through the water pipe joint (30), and the plurality of sections of sub-circulating pipelines (22) are arranged in parallel.

6. The energy storage device of claim 5, wherein the energy storage device comprises,

the water pipe joint (30) comprises a water inlet joint (31) and a water outlet joint (32) which are positioned at the outer side of the energy storage layer (11);

the sub-circulation pipeline (22) comprises a sub-water inlet pipeline (221) and a sub-water outlet pipeline (222) which are distributed at intervals along the height direction (Z) of the energy storage layer (11), and the sub-water inlet pipeline (221) and the sub-water outlet pipeline (222) are respectively communicated with the cooling passage inside the energy storage layer (11) through the water inlet joint (31) and the water outlet joint (32).

7. The energy storage device according to claim 6, wherein the main circulation pipe (21) comprises a main water inlet pipe (211) and a main water outlet pipe (212) which are distributed at intervals along the length direction (X) or the width direction (Y) of the energy storage device body (10), all the sub water inlet pipes (221) are communicated in parallel through the main water inlet pipe (211), and all the sub water outlet pipes (222) are communicated in parallel through the main water outlet pipe (212).

8. Energy storage device according to claim 5, characterized in that the main circulation duct (21) is configured as an insulating duct and the sub-circulation duct (22) is configured as a conductive duct, the sub-circulation duct (22) being connected to a portion of the corresponding energy storage layer (11).

9. Energy storage device according to any of claims 5 to 8, characterized in that a shielding (50) is provided around the outside of the water connection (30) and the sub-circulation pipe (22).

10. The energy storage device according to claim 5, wherein the energy storage layer (11) comprises an electric cabinet (111) and a main control box (112), the main control box (112) is arranged at the outer side of the electric cabinet (111) and is electrically connected with the electric cabinet (111), and the outer side of the electric cabinet (111) along the length direction (X) or the width direction (Y) is provided with a water pipe joint (30) communicated with the cooling passage inside the electric cabinet (111).

11. The energy storage device according to claim 10, wherein the main control box (112) is arranged at the top of the electric cabinet (111), and a first waterproof cover (1121) is arranged at the top of the main control box (112).

12. Energy storage device according to claim 10, characterized in that the junction of the electrical cabinet (111) and the water connection (30) is provided with a sealing structure.

13. The energy storage device according to claim 5, characterized in that the energy storage layer (11) further comprises a power module (113), the power module (113) having a water connection (30) on the outside in the length direction (X) or width direction (Y) in communication with the cooling passage inside the power module (113).

14. The energy storage device according to claim 13, characterized in that a second waterproof cover (1131) is arranged at the top of the power module (113), a drainage disc (1132) is arranged at the bottom of the power module (113), and the drainage disc (1132) is used for collecting leaked cooling liquid and guiding the cooling liquid to the water collecting disc (40).

15. The energy storage device according to claim 5, wherein the energy storage layer (11) further comprises a busbar (114), and a third waterproof cover (1141) is provided on top of the busbar (114).