CN218996864U

CN218996864U - Energy storage device

Info

Publication number: CN218996864U
Application number: CN202223601941.XU
Authority: CN
Inventors: 方亚龙; 黄伟鹏; 范尚杰
Original assignee: Xiamen Hithium Energy Storage Technology Co Ltd
Current assignee: Xiamen Hithium Energy Storage Technology Co Ltd
Priority date: 2022-12-30
Filing date: 2022-12-30
Publication date: 2023-05-09
Anticipated expiration: 2032-12-30

Abstract

The application provides an energy storage device. The energy storage device comprises a plurality of battery cluster modules and a liquid cooling system, wherein the battery cluster modules are arranged along the width direction, and the liquid cooling system comprises a plurality of liquid inlet main pipelines, a plurality of liquid return main pipelines and a liquid cooling unit. The liquid cooling unit comprises a plurality of liquid supply ends and a plurality of liquid return ends, the liquid supply ends are communicated with the liquid inlet main pipes in a one-to-one correspondence manner, the liquid return ends are communicated with the liquid return main pipes in a one-to-one correspondence manner, the liquid cooling unit supplies cooling liquid to the liquid inlet main pipes in a corresponding manner, and the liquid return main pipes flow cooling liquid after flowing through the corresponding battery cluster modules from the corresponding liquid return ends into the liquid cooling unit.

Description

Energy storage device

Technical Field

The application relates to the technical field of energy storage, in particular to an energy storage device.

Background

The energy storage device can be used for storing electric energy converted from various green energy sources, such as wind power generation, photovoltaic power generation, solar power generation and the like, and can also be used for electric equipment of various substations or engineering construction. The energy storage device has the characteristics of simplified infrastructure construction cost, short construction period, high modularization degree, convenience in transportation and installation and the like.

Along with the continuous increase of energy storage device capacity demand, required battery capacity increases gradually for the calorific capacity of battery in the energy storage device increases constantly, in order to guarantee the life of battery, need control the operating temperature of battery in suitable scope, adopt the mode control battery's of liquid cooling generally operating temperature, specifically be to utilize the liquid cooling pipeline to carry the coolant liquid to every battery department, for the battery heat dissipation, but among the prior art, the flow homogeneity of coolant liquid in the liquid cooling pipeline is relatively poor, causes the battery temperature difference of each different positions great, makes the radiating effect unbalanced, and then influences energy storage device's job stabilization nature and life.

Disclosure of Invention

For solving the technical problem, the application provides an energy storage device, which can improve the flow uniformity of cooling liquid flowing through a plurality of battery cluster modules, and further can improve the temperature uniformity of the battery cluster modules, so that the working stability and the service life of the energy storage device can be improved.

The application provides an energy storage device, energy storage device includes a plurality of battery cluster modules and the liquid cooling system of arranging along width direction, the liquid cooling system includes a plurality of feed liquor trunk lines, a plurality of liquid trunk lines and liquid cooling unit that returns. The liquid cooling unit comprises a plurality of liquid supply ends and a plurality of liquid return ends, the liquid supply ends are communicated with the liquid supply main pipes in a one-to-one correspondence manner, the liquid cooling unit outputs cooling liquid from the liquid supply ends to the corresponding liquid return main pipes, and the liquid return main pipes enable the cooling liquid flowing through the corresponding liquid return ends after the battery cluster modules to flow into the liquid cooling unit.

The energy storage device that this application provided is connected with solitary feed liquor trunk line and solitary back liquid trunk line respectively through setting up each battery cluster module for the flow of the coolant liquid of each battery cluster module of flowing through is the same, thereby can promote the flow homogeneity of the coolant liquid of flowing through a plurality of battery cluster modules, can reduce the difference in temperature between the different battery cluster modules and improve the samming nature of a plurality of battery cluster modules, thereby improved energy storage device's stability and life.

Optionally, the plurality of main liquid inlet pipes and the plurality of main liquid outlet pipes are respectively located above each of the plurality of battery cluster modules.

Optionally, the liquid supply ends and the liquid return ends are all located above the liquid cooling unit.

Optionally, the main liquid inlet pipe and the main liquid outlet pipe corresponding to the same battery cluster module are arranged on the same side of the battery cluster module.

Optionally, each of the battery cluster modules includes a plurality of battery clusters arranged along a length direction, the liquid cooling system further includes a plurality of liquid inlet sub-pipeline groups and a plurality of liquid return sub-pipeline groups, the liquid inlet sub-pipeline groups are in one-to-one correspondence with the battery cluster modules, each of the liquid inlet sub-pipeline groups includes a plurality of liquid inlet sub-pipelines arranged at intervals along the length direction, the liquid inlet sub-pipelines are in one-to-one correspondence with the battery clusters in the corresponding battery cluster module, the liquid inlet sub-pipelines are communicated with the corresponding liquid inlet main pipeline, and each of the liquid inlet sub-pipelines is connected between the corresponding battery cluster and the liquid inlet main pipeline; the liquid return pipe branch pipe groups are in one-to-one correspondence with the battery cluster modules, each liquid return pipe branch pipe group comprises a plurality of liquid return pipe branch pipes which are distributed at intervals along the length direction, the liquid return pipe branch pipes are in one-to-one correspondence with the battery clusters in the corresponding battery cluster modules, the liquid return pipe branch pipes are communicated with the corresponding liquid return main pipe, and each liquid return pipe branch pipe is connected between the corresponding battery cluster and the liquid return main pipe.

Optionally, each battery cluster includes a plurality of battery packs arranged at intervals along a height direction, the liquid cooling system further includes a plurality of liquid inlet branch pipe groups and a plurality of liquid return branch pipe groups, the plurality of liquid inlet branch pipe groups are in one-to-one correspondence with the plurality of battery clusters, each liquid inlet branch pipe group includes a plurality of liquid inlet branch pipes arranged at intervals along the height direction, the plurality of liquid inlet branch pipes are in one-to-one correspondence with the plurality of battery packs in the corresponding battery cluster, the plurality of liquid inlet branch pipes are communicated with the corresponding liquid inlet branch pipes, and each liquid inlet branch pipe is connected between the corresponding battery pack and the corresponding liquid inlet branch pipe; the liquid branch pipeline sets return to the liquid branch pipeline sets, correspond to the battery clusters one by one, each liquid branch pipeline set returns to the liquid branch pipeline sets including following the height direction interval is arranged a plurality of liquid branch pipelines that return to the liquid branch pipeline with the corresponding a plurality of battery package one by one in the battery cluster, a plurality of liquid branch pipelines return to the liquid branch pipeline with the correspondence return to the liquid branch pipeline intercommunication, each liquid branch pipeline returns to the liquid branch pipeline connection in the correspondence the battery package with return to between the liquid branch pipeline.

Optionally, each liquid inlet branch pipeline comprises a first liquid inlet branch pipeline and a second liquid inlet branch pipeline which are communicated, the first liquid inlet branch pipeline is communicated with the corresponding liquid inlet main pipeline, the second liquid inlet branch pipeline of each liquid inlet branch pipeline corresponds to a battery cluster, and the second liquid inlet branch pipeline is connected with the plurality of liquid inlet branch pipelines; each liquid return branch pipeline comprises a first liquid return branch pipeline and a second liquid return branch pipeline which are communicated, the first liquid return branch pipeline is communicated with the corresponding liquid return main pipeline, the second liquid return branch pipeline of each liquid return branch pipeline corresponds to a battery cluster, and the second liquid return branch pipeline is connected with the plurality of liquid return branch pipelines.

Optionally, the second liquid inlet branch pipe and the second liquid outlet branch pipe corresponding to the same battery cluster are arranged on the same side of the battery cluster.

Optionally, each battery pack includes a case, a battery module accommodated in the case, and a cooling assembly for dissipating heat from the battery module. The cooling assembly comprises a liquid cooling plate, a liquid inlet end and a liquid outlet end, wherein the liquid inlet end and the liquid outlet end at least partially extend out of the box body, a cooling liquid flow passage is arranged in the liquid cooling plate, the liquid inlet end and the liquid outlet end are respectively communicated with the cooling liquid flow passage, the liquid inlet end of each battery pack is communicated with a corresponding liquid inlet branch pipeline, and the liquid outlet end of each battery pack is communicated with a corresponding liquid return branch pipeline.

Optionally, the liquid inlet length and the liquid return length of all the battery packs are equal, the liquid inlet length of the battery pack is equal to the length of a pipeline between the liquid inlet end of the battery pack and the liquid supply end of the liquid cooling unit, and the liquid return length of the battery pack is equal to the length of a pipeline between the liquid outlet end of the battery pack and the liquid return end of the liquid cooling unit.

Drawings

In order to more clearly illustrate the technical solutions of the present application, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

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

Fig. 2 is a schematic diagram of the liquid cooling system shown in fig. 1.

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

Reference numerals illustrate:

energy storage device 100

Battery cluster module 10

Battery cluster 11

Liquid cooling system 20

Main liquid inlet pipe 21

Liquid return main pipe 22

Liquid cooling unit 23

Liquid supply end 231

Liquid return end 232

Liquid inlet branch pipeline group 24

Liquid inlet branch pipe 241

Liquid return branch pipeline group 25

Liquid return branch pipe 251

Inlet branch pipe group 26

Feed liquor branch 261

Liquid return branch pipe group 27

Liquid return branch pipe 271

Battery pack 111

Box 1111

Cooling assembly 1112

Liquid inlet end 11121

Liquid outlet end 11122

First liquid inlet branch pipe 2411

Second liquid inlet branch pipe 2412

First liquid return branch line 2511

Second liquid return branch line 2512

Energy storage device case 30

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without undue burden, are within the scope of the present application.

In the description of the present application, the terms "first," "second," "third," "fourth," and the like are used for distinguishing between different objects and not for describing a particular sequential order, and the terms "upper," "lower," "inner," and the like are merely used for convenience in describing the present application and to simplify the description, and do not denote or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present application.

In the description of the present application, unless explicitly stated and limited otherwise, the term "coupled" is to be interpreted broadly, as for example, being either fixedly coupled, detachably coupled, or integrally coupled; can be directly connected, can also be indirectly connected through an intermediate medium, and can also be the communication between the two elements; may be a communication connection; may be an electrical connection. 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.

It should be noted that, the illustrations provided in the embodiments of the application are merely schematic illustrations of the basic concepts of the application, and only the components related to the application are shown in the illustrations, rather than being drawn according to the number, shape and size of the components in actual implementation, and the form, number and proportion of each component in actual implementation may be changed arbitrarily, and the layout of the components may be more complex.

Referring to fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of an energy storage device 100 according to an embodiment of the present application, and fig. 2 is a schematic structural diagram of a liquid cooling system 20 shown in fig. 1. As shown in fig. 1, the energy storage device 100 includes a plurality of battery modules 10 arranged in a width direction (X direction as shown in fig. 1) and a liquid cooling system 20, and the liquid cooling system 20 includes a plurality of main liquid inlet pipes 21, a plurality of main liquid return pipes 22, and a liquid cooling unit 23. The plurality of main liquid inlet pipes 21 are in one-to-one correspondence with the plurality of battery cluster modules 10, the plurality of main liquid inlet pipes 21 respectively provide cooling liquid for each battery cluster module 10 in the plurality of battery cluster modules 10, the plurality of main liquid return pipes 22 are in one-to-one correspondence with the plurality of battery cluster modules 10, the plurality of main liquid return pipes 22 respectively collect cooling liquid flowing through each battery cluster module 10 in the plurality of battery cluster modules 10, the liquid cooling unit 23 comprises a plurality of liquid supply ends 231 and a plurality of liquid return ends 232, the plurality of liquid supply ends 231 are in one-to-one communication with the plurality of main liquid inlet pipes 21, the plurality of liquid return ends 232 are in one-to-one communication with the plurality of main liquid return pipes 22, the liquid cooling unit 23 outputs the cooling liquid from the liquid supply ends 231 to the corresponding main liquid inlet pipes 21, and the liquid return pipes 22 flow the cooling liquid flowing through the corresponding battery cluster modules 10 into the liquid cooling unit 23 from the corresponding liquid return ends 232.

According to the energy storage device 100 provided by the embodiment of the application, each battery cluster module 10 is connected with the independent main liquid inlet pipeline 21 and the independent main liquid return pipeline 22 respectively, so that the flow of cooling liquid flowing through each battery cluster module 10 is the same, the flow uniformity of the cooling liquid flowing through a plurality of battery cluster modules 10 can be improved, the temperature difference between different battery cluster modules 10 can be reduced, the temperature uniformity of the plurality of battery cluster modules 10 can be improved, and the stability and the service life of the energy storage device 100 can be improved.

Each main liquid inlet pipe 21 is connected to one battery cluster module 10, each main liquid return pipe 22 is connected to one battery cluster module 10, the liquid cooling unit 23 provides cooling liquid to the corresponding battery cluster module 10 through the liquid supply end 231 and the main liquid inlet pipe 21, the cooling liquid flows through the corresponding battery cluster module 10 and takes away heat generated by the battery cluster module 10, the cooling liquid after absorbing the heat flows into the main liquid return pipe 22, and flows into the liquid cooling unit 23 through the liquid return end 232, so that heat dissipation of the battery cluster module 10 is realized.

Wherein the width direction is the width direction of the energy storage device 100.

The liquid cooling unit 23 may include a coolant driver for driving the coolant to be input into the corresponding main coolant inlet pipe 21 from the plurality of liquid supply ends 231, so as to supply the coolant to the plurality of battery cluster modules 10, and a heat exchanger for cooling the coolant flowing out of the main coolant return pipe 22, where the cooled coolant may be input into the main coolant inlet pipe 21 again to dissipate heat of the plurality of battery cluster modules 10, so as to realize recycling of the coolant and continuously and stably cool the plurality of battery cluster modules 10. The coolant driver may be a circulation pump or the like.

The cooling liquid can be water, glycol, mixed liquid of water and glycol, ethanol, alcohol, cooling oil and the like. It is obvious that the cooling liquid may also be other types of cooling liquid.

In some embodiments, as shown in fig. 1 and 2, the plurality of main liquid inlet pipes 21 and the plurality of main liquid return pipes 22 are respectively located above each of the plurality of battery cluster modules 10.

In some embodiments, as shown in fig. 1 and 2, the plurality of liquid supply ends 231 and the plurality of liquid return ends 232 are located above the liquid cooling unit 23.

The main liquid inlet pipe 21 and the main liquid return pipe 22 are located above the battery cluster module 10, and the liquid supply end 231 and the liquid return end 232 are located above the liquid cooling unit 23, so that a path of the cooling liquid flowing out from the liquid supply end 231 and reaching the battery cluster module 10 through the main liquid inlet pipe 21 is shorter, transmission resistance of the cooling liquid from the liquid supply end 231 to the battery cluster module 10 is reduced, a heat dissipation path is shortened, cooling liquid is further cooled by the battery cluster module 10, and a path of the cooling liquid flowing into the liquid return end 232 through the main liquid return pipe 22 after flowing through the battery cluster module 10 is shorter, resistance of the cooling liquid from the battery cluster module 10 to the liquid return end 232 is reduced, and the cooling liquid is further cooled by the battery cluster module 10.

In other embodiments, the main liquid inlet pipe 21 and the main liquid return pipes 22 may be located below each of the plurality of battery cluster modules 10; alternatively, the plurality of main liquid inlet pipes 21 are located above each of the plurality of battery cluster modules 10, and the plurality of main liquid return pipes 22 are located below each of the plurality of battery cluster modules 10; alternatively, the plurality of main liquid inlet pipes 21 are located below each of the plurality of battery cluster modules 10, and the plurality of main liquid return pipes 22 are located above each of the plurality of battery cluster modules 10.

In other embodiments, the liquid supply ends 231 and the liquid return ends 232 may be located below the liquid cooling unit 23; alternatively, the plurality of liquid supply ends 231 are located above the liquid cooling unit 23, and the plurality of liquid return ends 232 are located below the liquid cooling unit 23; alternatively, the liquid supply ends 231 are located below the liquid cooling unit 23, and the liquid return ends 232 are located above the liquid cooling unit 23.

In some embodiments, as shown in fig. 1 and 2, the main liquid inlet pipe 21 and the main liquid return pipe 22 corresponding to the same battery cluster module 10 are disposed on the same side of the battery cluster module 10, so that the space occupied by the main liquid inlet pipe 21 and the main liquid return pipe 22 can be reduced, which is beneficial to reducing the volume of the energy storage device 100.

The main liquid inlet pipe 21 and the main liquid return pipe 22 may be arranged side by side, which is beneficial to saving the occupied space.

In some embodiments, as shown in fig. 1, the extending direction of the main liquid inlet pipe 21 and the extending direction of the main liquid return pipe 22 are parallel to the length direction, so that the space occupied by the energy storage device 100 in the width direction can be saved, and the liquid cooling system 20 and the plurality of battery cluster modules 10 can be more orderly and attractive in cooperation.

In some embodiments, as shown in fig. 1, the energy storage device 100 may include two battery cluster modules 10, two main liquid inlet pipes 21, and two main liquid return pipes 22, where each main liquid inlet pipe 21 is connected to one battery cluster module 10, and each main liquid return pipe 22 is connected to one battery cluster module 10. It is obvious that the number of the plurality of battery cluster modules 10, the plurality of main liquid inlet pipes 21 and the plurality of main liquid return pipes 22 may be other values, for example, four, five, etc.

In some embodiments, as shown in fig. 1, each of the battery cluster modules 10 includes a plurality of battery clusters 11 arranged in a length direction (Y direction as shown in fig. 1). As shown in fig. 1 and 2, the liquid cooling system 20 further includes a plurality of liquid inlet branch pipe groups 24 and a plurality of liquid return branch pipe groups 25, the plurality of liquid inlet branch pipe groups 24 are in one-to-one correspondence with the plurality of battery cluster modules 10, each liquid inlet branch pipe group 24 includes a plurality of liquid inlet branch pipes 241 arranged at intervals along the length direction, the plurality of liquid inlet branch pipes 241 are in one-to-one correspondence with the plurality of battery clusters 11 in the corresponding battery cluster module 10, and the plurality of liquid inlet branch pipes 241 are communicated with the corresponding main liquid inlet pipe 21, and each liquid inlet branch pipe 241 is connected between the corresponding battery cluster 11 and the main liquid inlet pipe 21. The plurality of liquid return branch pipe groups 25 are in one-to-one correspondence with the plurality of battery cluster modules 10, each liquid return branch pipe group 25 comprises a plurality of liquid return branch pipes 251 which are arranged at intervals along the length direction, the plurality of liquid return branch pipes 251 are in one-to-one correspondence with the plurality of battery clusters 11 in the corresponding battery cluster module 10, the plurality of liquid return branch pipes 251 are communicated with the corresponding liquid return main pipe 22, and each liquid return branch pipe 251 is connected between the corresponding battery cluster 11 and the corresponding liquid return main pipe 22.

Wherein the length direction is the length direction of the energy storage device 100.

Wherein, through setting up the main feed liquor pipe 21 is connected with a plurality of feed liquor branch pipelines 241 and the main return liquor pipe 22 is connected with a plurality of return liquor branch pipelines 251, each battery cluster 11 corresponds with a feed liquor branch pipeline 241 and a return liquor branch pipeline 251 for can be through a plurality of feed liquor branch pipelines 241 provide the coolant liquid to corresponding battery cluster 11 respectively, and collect the coolant liquid that flows through corresponding battery cluster 11 through a plurality of return liquor branch pipelines 251, thereby ensure the flow homogeneity of coolant liquid of each battery cluster 11 in each battery cluster module 10, avoid each battery cluster 11 in each battery cluster module 10 to appear the uneven condition of temperature, and then make the working property of energy storage device 100 stable and can increase in service life.

The liquid inlet branch pipe 241 and the liquid return branch pipe 251 corresponding to the same battery cluster 11 may be arranged side by side, so as to reduce the space occupied by the liquid inlet branch pipe 241 and the liquid return branch pipe 251.

In some embodiments, as shown in fig. 1, each of the battery cluster modules 10 may include five battery clusters 11, each of the inlet manifold groups 24 may include five inlet manifold pipes 241, each of the return manifold groups 25 may include five return manifold pipes 251, each of the inlet manifold pipes 241 corresponds to one of the battery clusters 11, and each of the return manifold pipes 251 corresponds to one of the battery clusters 11. It is obvious that the number of the battery clusters 11 included in each battery cluster module 10 may be other values, the number of the intake sub-pipes 241 included in each intake sub-pipe group 24 may be other values, and the number of the return sub-pipes 251 included in each return sub-pipe group 25 may be other values, for example, eight, ten, etc.

In other embodiments, each of the battery cluster modules 10 may include one battery cluster 11, each of the inlet branch pipe groups 24 may include one inlet branch pipe 241, the inlet branch pipe 24 is connected to the corresponding inlet main pipe 21 and the corresponding battery cluster 11, and each of the return branch pipe groups 25 may include one return branch pipe 251, the return branch pipe 251 is connected to the corresponding return main pipe 22 and the corresponding battery cluster 11.

In some embodiments, as shown in fig. 1, each battery cluster 11 includes a plurality of battery packs 111 arranged at intervals in the height direction (Z direction as shown in fig. 1). As shown in fig. 1 and 2, the liquid cooling system 20 further includes a plurality of liquid inlet branch pipe groups 26 and a plurality of liquid return branch pipe groups 27, the plurality of liquid inlet branch pipe groups 26 are in one-to-one correspondence with the plurality of battery clusters 11, each of the liquid inlet branch pipe groups 26 includes a plurality of liquid inlet branch pipes 261 arranged at intervals along the height direction, the plurality of liquid inlet branch pipes 261 are in one-to-one correspondence with the plurality of battery packs 111 in the corresponding battery clusters 11, the plurality of liquid inlet branch pipes 261 are communicated with the corresponding liquid inlet branch pipes 241, and each of the liquid inlet branch pipes 261 is connected between the corresponding battery pack 111 and the liquid inlet branch pipe 241. The plurality of liquid return branch pipe groups 27 are in one-to-one correspondence with the plurality of battery clusters 11, each liquid return branch pipe group 27 comprises a plurality of liquid return branch pipes 271 which are arranged at intervals along the height direction, the plurality of liquid return branch pipes 271 are in one-to-one correspondence with the plurality of battery packs 111 in the corresponding battery clusters 11, the plurality of liquid return branch pipes 271 are communicated with the corresponding liquid return branch pipes 251, and each liquid return branch pipe 271 is connected between the corresponding battery pack 111 and the liquid return branch pipe 251.

Wherein the height direction is the height direction of the energy storage device 100.

Wherein, through setting up each feed liquor branch pipe 241 and being connected with a plurality of feed liquor branch pipes 261 and each return liquor branch pipe 251 and being connected with a plurality of return liquor branch pipes 271, each battery package 111 corresponds with a feed liquor branch pipe 261 and a return liquor branch pipe 271 for can be through a plurality of feed liquor branch pipes 261 provide the coolant liquid to corresponding battery package 111 respectively, and collect the coolant liquid that flows through corresponding battery package 111 through a plurality of return liquor branch pipes 271, thereby ensure the flow homogeneity of the coolant liquid of each battery package 111 in each battery cluster 11, avoid each battery package 111 in each battery cluster 11 to appear the uneven condition of temperature, can further improve energy memory 100's working property and increase in service life.

In some embodiments, as shown in fig. 1, each battery cluster 11 may include eight battery packs 111, each of the inlet branch pipe groups 26 may include eight inlet branch pipes 261, each of the return branch pipe groups 27 may be connected with eight return branch pipes 271, each of the inlet branch pipes 261 corresponds to one of the battery packs 111, and each of the return branch pipes 271 corresponds to one of the battery packs 111. It is obvious that the number of the battery packs 111 included in each battery cluster 11 may be other values, the number of the inlet branch pipes 261 included in each inlet branch pipe group 26 may be other values, and the number of the return branch pipes 271 included in each return branch pipe group 27 may be other values, for example, ten, five, etc.

In some embodiments, each battery pack 111 includes a case 1111, a battery module accommodated in the case 1111, and a cooling component 1112 accommodated in the case 1111, the cooling component 1112 being configured to dissipate heat from the battery module.

The cooling assembly 1112 includes a liquid cooling plate (not shown), a liquid inlet end 11121, and a liquid outlet end 11122, where the liquid inlet end 11121 and the liquid outlet end 11122 extend at least partially out of the box 1111, that is, at least part of the liquid inlet end 11121 and at least part of the liquid outlet end 11122 extend out of the box 1111, and a cooling liquid flow channel (not shown) is disposed in the liquid cooling plate, and the liquid inlet end 11121 and the liquid outlet end 11122 are respectively communicated with the cooling liquid flow channel.

Wherein the liquid inlet end 11121 of each battery pack 111 is communicated with the corresponding liquid inlet branch pipe 261, and the liquid outlet end 11122 of each battery pack 111 is communicated with the corresponding liquid return branch pipe 271.

Each battery pack 11 corresponds to a liquid inlet branch pipe 261 and a liquid return branch pipe 271, the liquid inlet end 11121 of the battery pack 111 is connected to the corresponding liquid inlet branch pipe 261, and the liquid outlet end 11122 of the battery pack 111 is connected to the corresponding liquid return branch pipe 271. The cooling liquid in the liquid inlet branch pipe 261 flows into the liquid cooling plate from the liquid inlet end 11121, takes away the heat generated by the battery module when flowing through the cooling liquid flow channel, and the cooling liquid after absorbing the heat flows out from the liquid outlet end 11122 and enters the liquid return branch pipe 271, then flows into the liquid return branch pipe 251, flows into the liquid return main pipe 22, and finally enters the liquid cooling unit 23 through the liquid return end 232, thereby realizing heat dissipation for the battery module.

In some embodiments, a first connector is disposed at the liquid inlet end 11121, and a second connector is connected to an end of the liquid inlet branch pipe 261 remote from the liquid inlet branch pipe 241, and the first connector is connected to the second connector, so that the liquid inlet end 11121 is connected to the liquid inlet branch pipe 261.

Wherein the first connector and the second connector can be fluid connectors or hydraulic quick-change connectors. The first connector may be a male end fluid connector, the second connector may be a female end fluid connector, or the first connector may be a female end fluid connector, and the second connector may be a male end fluid connector.

When the first connector is separated from the second connector, the first connector and the second connector can be automatically closed, the liquid inlet branch pipeline 261 and the liquid inlet end 11121 are closed, leakage of cooling liquid in the liquid inlet end 11121 and the liquid inlet branch pipeline 261 can be prevented, and accordingly leakage of cooling liquid caused by separation of the liquid inlet pipeline can be effectively prevented, and safety and reliability of liquid cooling heat dissipation are improved.

In some embodiments, a third connector is disposed at the liquid outlet end 11122, and a third connector is connected to an end of the liquid return branch pipe 271 remote from the liquid return branch pipe 251, and the third connector is connected to the fourth connector, so that the liquid outlet end 11122 is connected to the liquid return branch pipe 271.

Wherein the third connector and the fourth connector can be fluid connectors or hydraulic quick-change connectors. The third connector may be a male end fluid connector, the fourth connector may be a female end fluid connector, or the third connector may be a female end fluid connector, and the fourth connector may be a male end fluid connector.

When the third connector is separated from the fourth connector, the third connector and the fourth connector can be automatically closed to close the liquid return branch pipe 271 and the liquid outlet end 11122, so that leakage of cooling liquid in the liquid outlet end 11122 and the liquid return branch pipe 271 can be prevented, leakage of cooling liquid caused by separation of the liquid outlet pipe can be effectively prevented, and safety and reliability of liquid cooling heat dissipation are improved.

In some embodiments, as shown in fig. 1 and 2, each of the liquid inlet branch pipes 241 includes a first liquid inlet branch pipe 2411 and a second liquid inlet branch pipe 2412 which are communicated, the first liquid inlet branch pipe 2411 is communicated with the corresponding liquid inlet main pipe 21, the second liquid inlet branch pipe 2412 of each of the liquid inlet branch pipes 241 is corresponding to a battery cluster 11, and the second liquid inlet branch pipe 2412 is connected with the plurality of liquid inlet branch pipes 261. Each of the liquid return branch pipes 251 includes a first liquid return branch pipe 2511 and a second liquid return branch pipe 2512, where the first liquid return branch pipe 2511 is communicated with the corresponding liquid return main pipe 22, the second liquid return branch pipe 2512 of each liquid return branch pipe 251 corresponds to a battery cluster 11, and the second liquid return branch pipe 2512 is connected with the plurality of liquid return branch pipes 271.

The extending direction of the second liquid inlet branch pipe 2412 is parallel to the height direction, and the extending direction of the second liquid return branch pipe 2512 is parallel to the height direction.

The extending direction of the second liquid inlet branch pipe 2412 is parallel to the height direction, so that the plurality of battery packs 111 of each battery cluster 11 are connected with the plurality of liquid inlet branch pipes 261 connected to the second liquid inlet branch pipe 2412.

The extending direction of the second liquid return branch line 2512 is parallel to the height direction, so that the plurality of battery packs 111 of each battery cluster 11 are connected with the plurality of liquid return branch lines 271 connected to the second liquid return branch line 2512.

In some embodiments, as shown in fig. 1, the second liquid inlet branch pipe 2412 and the second liquid return branch pipe 2512 corresponding to the same battery cluster 11 are disposed on the same side of the battery cluster 11, so that the space occupied by the second liquid inlet branch pipe 2412 and the second liquid return branch pipe 2512 can be reduced, which is beneficial to reducing the volume of the energy storage device 100.

The second liquid inlet branch pipe 2412 and the second liquid return branch pipe 2512 corresponding to the same battery cluster 11 may be arranged side by side, which is beneficial to saving occupied space.

In some embodiments, the liquid inlet branch pipe 241 is detachably connected to the liquid inlet main pipe 21 and the liquid inlet branch pipe 261, so that the liquid inlet main pipe 21, the liquid inlet branch pipe 241 and the liquid inlet branch pipe 261 are independent from each other, and can be independently disassembled, assembled and maintained, so that the pipeline is convenient to install and maintain.

Wherein, the liquid inlet branch pipe 241 is detachably connected with the liquid inlet main pipe 21 and the liquid inlet branch pipe 261 through pipe connectors, and the pipe connectors may include an inner wire connector, an outer wire connector, a hot melt connector, a quick connector, etc.

In some embodiments, the liquid return branch pipe 251 is detachably connected to the liquid return main pipe 22 and the liquid return branch pipe 271, so that the liquid return main pipe 22, the liquid return branch pipe 251 and the liquid return branch pipe 271 are independent from each other, and can be independently disassembled and maintained, thereby facilitating the installation and maintenance of the pipeline.

Wherein, the liquid return branch pipe 251, the liquid return main pipe 22 and the liquid return branch pipe 271 can be detachably connected through pipe connectors, and the pipe connectors can comprise an inner wire connector, an outer wire connector, a hot melt connector, a quick connector and the like.

In some embodiments, the liquid inlet length and the liquid return length of all the battery packs 111 are equal, that is, the liquid inlet length of each battery pack 111 is equal to the liquid return length of the battery pack 111, the liquid inlet length of the battery pack 111 is equal to the length of the pipe between the liquid inlet end 11121 of the battery pack 111 and the liquid supply end 231 of the liquid cooling unit 23, and the liquid return length of the battery pack 111 is equal to the length of the pipe between the liquid outlet end 11122 of the battery pack 111 and the liquid return end 232 of the liquid cooling unit 23. That is, the length of the path through which the cooling liquid flows out of the liquid supply end 231 and flows through the main liquid inlet pipe 21, the sub liquid inlet pipe 241, and the sub liquid inlet pipe 261 to the liquid inlet end 11121 is equal to the length of the path through which the cooling liquid flows out of the liquid outlet end 11122 and flows through the sub liquid return pipe 271, the sub liquid return pipe 251, and the main liquid return pipe 22 to the sub liquid return end 232.

Wherein, by setting the liquid intake length of each of the battery packs 111 to be equal to the liquid return length thereof, the pressure of the cooling liquid outputted from the liquid supply end 231 can be made substantially equal to the pressure of the cooling liquid flowing to the liquid return end 232, whereby the safety of the liquid cooling unit 23 can be ensured, and the cooling treatment of the cooling liquid having absorbed heat flowing from the liquid return end 232 by the liquid cooling unit 23 is facilitated.

Referring to fig. 3, a schematic structure of an energy storage device 100 according to another embodiment of the present disclosure is shown. In some embodiments, as shown in fig. 3, the energy storage device 100 further includes an energy storage device case 30, where the energy storage device case 30 includes a cluster frame, where the cluster frame is used to support the battery pack 111, and the cluster frame includes a plurality of supporting vertical beams and a plurality of bearing members, where the bearing members are vertically disposed with respect to the supporting vertical beams and are fixedly connected with the supporting vertical beams, and the battery pack 111 is disposed on two adjacent bearing members, and the two bearing members provide support for the battery pack 111. Wherein, adjacent battery packs 111 are arranged at intervals to provide a heat dissipation space. The support vertical beams and the bearing members can be made of metal materials, and the bearing members can be connected with the support number in a welding or bolting mode to form the cluster frame.

The foregoing is a description of embodiments of the present application, and it should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principles of the embodiments of the present application, and these improvements and modifications are also considered as the protection scope of the present application.

Claims

1. An energy storage device, characterized in that the energy storage device includes a plurality of battery cluster modules arranged along a width direction and a liquid cooling system, the liquid cooling system includes:

the plurality of liquid inlet main pipelines are in one-to-one correspondence with the plurality of battery cluster modules, and the plurality of liquid inlet main pipelines respectively provide cooling liquid for each battery cluster module in the plurality of battery cluster modules;

the plurality of liquid return main pipelines are in one-to-one correspondence with the plurality of battery cluster modules, and respectively collect cooling liquid after flowing through each battery cluster module in the plurality of battery cluster modules; and

the liquid cooling unit comprises a plurality of liquid supply ends and a plurality of liquid return ends, wherein the liquid supply ends are communicated with the liquid inlet main pipes in a one-to-one correspondence manner, the liquid return ends are communicated with the liquid return main pipes in a one-to-one correspondence manner, the liquid cooling unit outputs cooling liquid from the liquid supply ends to the corresponding liquid inlet main pipes, and the cooling liquid after flowing through the corresponding battery cluster modules flows into the liquid cooling unit from the corresponding liquid return ends through the liquid return main pipes.

2. The energy storage device of claim 1, wherein the plurality of main liquid inlet conduits and the plurality of main liquid return conduits are each located above a respective one of the plurality of battery cluster modules.

3. The energy storage device of claim 1 or 2, wherein the plurality of liquid supply ends and the plurality of liquid return ends are both located above the liquid cooling unit.

4. The energy storage device of claim 1, wherein the main liquid inlet pipe and the main liquid return pipe corresponding to the same battery cluster module are provided on the same side of the battery cluster module.

5. The energy storage device of claim 1, wherein each of said battery cluster modules comprises a plurality of battery clusters arranged along a length direction, said liquid cooling system further comprising:

the liquid inlet branch pipeline groups are in one-to-one correspondence with the battery cluster modules, each liquid inlet branch pipeline group comprises a plurality of liquid inlet branch pipelines which are arranged at intervals along the length direction, the liquid inlet branch pipelines are in one-to-one correspondence with the battery clusters in the corresponding battery cluster modules, the liquid inlet branch pipelines are communicated with the corresponding liquid inlet main pipelines, and each liquid inlet branch pipeline is connected between the corresponding battery cluster and the liquid inlet main pipeline;

the liquid return branch pipeline groups are in one-to-one correspondence with the battery cluster modules, each liquid return branch pipeline group comprises a plurality of liquid return branch pipelines which are arranged along the length direction at intervals, the liquid return branch pipelines are in one-to-one correspondence with the battery clusters in the corresponding battery cluster modules, the liquid return branch pipelines are communicated with the corresponding liquid return main pipeline, and each liquid return branch pipeline is connected between the corresponding battery cluster and the liquid return main pipeline.

6. The energy storage device of claim 5, wherein each of said battery clusters comprises a plurality of battery packs spaced apart in a height direction, said liquid cooling system further comprising:

the liquid inlet branch pipeline groups are in one-to-one correspondence with the battery clusters, each liquid inlet branch pipeline group comprises a plurality of liquid inlet branch pipelines which are arranged at intervals along the height direction, the liquid inlet branch pipelines are in one-to-one correspondence with the battery packs in the corresponding battery clusters, the liquid inlet branch pipelines are communicated with the corresponding liquid inlet branch pipelines, and each liquid inlet branch pipeline is connected between the corresponding battery pack and the corresponding liquid inlet branch pipeline;

the liquid branch pipeline sets return to the liquid branch pipeline sets, correspond to the battery clusters one by one, each liquid branch pipeline set returns to the liquid branch pipeline sets including following the height direction interval is arranged a plurality of liquid branch pipelines that return to the liquid branch pipeline with the corresponding a plurality of battery package one by one in the battery cluster, a plurality of liquid branch pipelines return to the liquid branch pipeline with the correspondence return to the liquid branch pipeline intercommunication, each liquid branch pipeline returns to the liquid branch pipeline connection in the correspondence the battery package with return to between the liquid branch pipeline.

7. The energy storage device of claim 6, wherein each of said inlet branch pipes comprises a first inlet branch pipe and a second inlet branch pipe in communication, said first inlet branch pipe being in communication with a corresponding said inlet main pipe, a second inlet branch pipe of each of said inlet branch pipes being in communication with a battery cluster, said second inlet branch pipe being connected to said plurality of inlet branch pipes; each liquid return branch pipeline comprises a first liquid return branch pipeline and a second liquid return branch pipeline which are communicated, the first liquid return branch pipeline is communicated with the corresponding liquid return main pipeline, the second liquid return branch pipeline of each liquid return branch pipeline corresponds to a battery cluster, and the second liquid return branch pipeline is connected with the plurality of liquid return branch pipelines.

8. The energy storage device of claim 7, wherein the second liquid inlet and outlet channels corresponding to the same cell cluster are disposed on the same side of the cell cluster.

9. The energy storage device of claim 6, wherein each battery pack comprises a case, a battery module received in the case, and a cooling assembly for dissipating heat from the battery module;

the cooling assembly comprises a liquid cooling plate, a liquid inlet end and a liquid outlet end, wherein the liquid inlet end and the liquid outlet end at least partially extend out of the box body, a cooling liquid flow passage is arranged in the liquid cooling plate, and the liquid inlet end and the liquid outlet end are respectively communicated with the cooling liquid flow passage;

the liquid inlet end of each battery pack is communicated with the corresponding liquid inlet branch pipeline, and the liquid outlet end of each battery pack is communicated with the corresponding liquid return branch pipeline.

10. The energy storage device of claim 9, wherein the liquid feed length and the liquid return length of all battery packs are equal; the liquid inlet length of the battery pack is equal to the length of a pipeline between the liquid inlet end of the battery pack and the liquid supply end of the liquid cooling unit; the liquid return length of the battery pack is equal to the length of a pipeline between the liquid outlet end of the battery pack and the liquid return end of the liquid cooling unit.