Energy storage device

Abstract

The embodiment of the utility model provides energy storage equipment which comprises an energy storage box comprising a battery compartment. The plurality of battery packs are arranged in the battery compartment; each battery pack comprises a liquid injection pipe and a liquid outlet pipe. The pipeline unit is arranged in the battery compartment and comprises a liquid inlet pipe and a liquid return pipe; the liquid inlet pipe is communicated with liquid injection pipes of a plurality of battery packs, and a liquid injection connector exposed out of the surface of the energy storage box is formed; the liquid return pipe is communicated with the liquid outlet pipes of the plurality of battery packs, and a liquid return connector exposed out of the surface of the energy storage box is formed; wherein the liquid injection connector is used for being communicated with a cooling liquid outlet of cooling equipment located outside the energy storage box, and the liquid return connector is used for being communicated with a cooling liquid return opening of the cooling equipment. The cooling equipment is moved out of the energy storage box and is communicated with the multiple battery packs in the battery bin through the pipeline units, so that the size of the electric bin is reduced while the battery packs are cooled, and the energy storage capacity of the energy storage equipment is improved; or the overall size of the energy storage equipment is reduced, so that the occupied space of the energy storage equipment is reduced.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of energy storage, in particular to an energy storage device. BACKGROUND

[0002] The energy storage device mainly includes two parts, mainly an electrical compartment and a battery compartment. A large amount of heat is generated during the charging and discharging process of the energy storage device. If the heat cannot be dissipated in time and effectively, the device will overheat, thereby affecting its safety and stability. In addition, proper cooling also helps to improve the efficiency and performance of the energy storage system, prolong the service life of the device, reduce operating costs, and improve the utilization rate of the energy storage device.

[0003] However, the cooling device in the prior art is mostly arranged in the electrical compartment, which results in a large space occupation of the electrical compartment in the entire energy storage device, and thus results in a small proportion of the battery compartment, thereby reducing the energy storage capacity of the energy storage device. However, if the number of battery cells is increased, the volume of the energy storage device will be large, and a large space will be occupied. SUMMARY

[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the present disclosure is to provide an energy storage device to solve the problems in the related art.

[0005] The first aspect of the present disclosure provides an energy storage device, comprising:

[0006] an energy storage box comprising a battery compartment;

[0007] a plurality of battery packs arranged in the battery compartment; each battery pack comprises a liquid injection pipe and a liquid outlet pipe;

[0008] a pipeline unit arranged in the battery compartment, comprising a liquid inlet pipe and a liquid return pipe; the liquid inlet pipe is connected to the liquid injection pipes of the plurality of battery packs and forms a liquid injection connection port exposed on the surface of the energy storage box; the liquid return pipe is connected to the liquid outlet pipes of the plurality of battery packs and forms a liquid return connection port exposed on the surface of the energy storage box; wherein the liquid injection connection port is connected to the cooling liquid outlet of the cooling device located outside the energy storage box, and the liquid return connection port is connected to the cooling liquid return of the cooling device.

[0009] In an embodiment of the first aspect, the liquid inlet pipe comprises a liquid inlet main pipe and a plurality of liquid inlet branch pipes; one end of the liquid inlet main pipe forms the liquid injection connection port, and the other end is connected to the plurality of liquid inlet branch pipes; the plurality of liquid inlet branch pipes are connected to the liquid injection pipes of the plurality of battery packs.

[0010] In an embodiment of the first aspect, the liquid inlet branch pipe comprises a plurality of liquid injection ports for connecting the liquid injection pipes of the plurality of battery packs.

[0011] In an embodiment of the first aspect, the liquid return pipe comprises a main liquid return pipe and a plurality of branch liquid return pipes; the main liquid return pipe is formed with the liquid return connection port at one end and is in communication with the plurality of branch liquid return pipes at the other end; the plurality of branch liquid return pipes are in communication with the liquid return pipes of the plurality of battery packs.

[0012] In an embodiment of the first aspect, the branch liquid return pipe is formed with a plurality of liquid collection ports for the liquid return pipes of the plurality of battery packs.

[0013] In an embodiment of the first aspect, the energy storage device further comprises a device compartment; the device compartment and the battery compartment are formed by dividing the interior of the energy storage device into upper and lower portions.

[0014] In an embodiment of the first aspect, the plurality of battery packs are arranged in two rows in the battery compartment; the area where the two rows of battery packs are close to each other forms the liquid outlet pipe; the liquid return pipe is in communication with the liquid outlet pipes of the plurality of battery packs and is formed with the liquid return connection port at one end.

[0015] In an embodiment of the first aspect, the liquid return pipe comprises a plurality of liquid collection ports for the liquid return pipes of the plurality of battery packs.

[0016] In an embodiment of the first aspect, the energy storage device further comprises a control unit; the control unit is in communication connection with the cooling device.

[0017] In an embodiment of the first aspect, the control unit comprises a controller, a plurality of temperature sensors and a plurality of electromagnetic valves; the controller is in communication connection with the plurality of temperature sensors, electromagnetic valves and the cooling device; one temperature sensor is arranged in each battery pack; one electromagnetic valve is arranged on the liquid inlet pipe or the liquid outlet pipe of each battery pack.

[0018] As described above, the energy storage device provided in the embodiments of the present disclosure includes an energy storage box, a plurality of battery packs, a pipeline unit, and a cooling device. The energy storage box includes a battery compartment. The plurality of battery packs are arranged in the battery compartment. Each battery pack includes a liquid injection pipe and a liquid outlet pipe. The pipeline unit is arranged in the battery compartment and includes a liquid inlet pipe and a liquid return pipe. The liquid inlet pipe is connected to the liquid injection pipes of the plurality of battery packs and forms a liquid injection connection port exposed on the surface of the energy storage box. The liquid return pipe is connected to the liquid outlet pipes of the plurality of battery packs and forms a liquid return connection port exposed on the surface of the energy storage box. The liquid injection connection port is connected to the cooling liquid outlet of the cooling device arranged outside the energy storage box, and the liquid return connection port is connected to the cooling liquid return of the cooling device. The energy storage device provided in the embodiments of the present disclosure separates the cooling device from the energy storage box and connects the pipeline unit to the plurality of battery packs in the battery compartment, thereby achieving cooling of the battery packs, reducing the volume of the battery compartment, improving the energy storage capacity of the energy storage device, or reducing the overall volume of the energy storage device to reduce the floor space occupied by the energy storage device. The temperature sensor and the electromagnetic valve in the control unit can change the flow of the cooling liquid in the cooling device into the battery packs according to the detection result of the temperature sensor, thereby further improving the cooling effect of the cooling device on the energy storage device. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 FIG. 1 shows the overall structure of the energy storage device in the embodiments of the present disclosure.

[0020] Figure 2 FIG. 2 shows the structure of the connection between the pipeline unit and the battery pack in the energy storage device in the embodiments of the present disclosure.

[0021] Figure 3 FIG. 3 shows the structure of the connection between the pipeline unit, the cooling device, and the battery pack in the energy storage device in the embodiments of the present disclosure.

[0022] Figure 4 FIG. 4 shows another embodiment of the structure of the connection between the pipeline unit and the battery pack in the embodiments of the present disclosure.

[0023] Figure 5 FIG. 5 shows the circuit connection of the control unit in the embodiments of the present disclosure. DETAILED DESCRIPTION

[0024] The advantages and features of the present disclosure will become apparent from specific examples which are given as thorough and complete descriptions of the present disclosure. It will be obvious to those skilled in the art that various other modifications or changes can be made thereto without departing from the spirit and scope of the present disclosure. It is to be understood that the embodiments and features of the present disclosure can be combined with each other, if not incompatible.

[0025] The embodiments of the present disclosure will be described in detail with reference to the drawings, so that those skilled in the art can easily implement the present disclosure. The present disclosure can be embodied in various ways, and is not limited to the embodiments described herein.

[0026] In the present disclosure, the expressions of "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" mean that the specific features, structures, materials, or characteristics expressed in connection with the embodiment or example are included in at least one embodiment or example of the present disclosure. Also, the specific features, structures, materials, or characteristics expressed can be combined in any one or a set of embodiments or examples in a suitable manner. In addition, the different embodiments or examples expressed in the present disclosure and the features of the different embodiments or examples can be combined and integrated by those skilled in the art without contradiction.

[0027] In addition, the terms "first", "second", etc. are used only to indicate the purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In the present disclosure, the meaning of "a set" is two or more, unless specifically limited.

[0028] In order to clearly explain the present disclosure, devices irrelevant to the description are omitted, and the same reference numerals are assigned to the same or similar constituent elements throughout the specification.

[0029] Throughout the specification, when it is said that a device is "connected" to another device, it includes not only the case of "direct connection", but also the case of "indirect connection" in which other elements are interposed therebetween. In addition, when it is said that a device "includes" a certain constituent element, unless specifically stated to the contrary, other constituent elements are not excluded, but it means that other constituent elements can also be included.

[0030] Although the terms first, second, etc. can be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first interface and a second interface, etc. Furthermore, as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises", "comprising", "includes" and / or "including" used herein specify the presence of stated features, steps, operations, elements, modules, items, components, and / or groups thereof, but do not preclude the presence or addition of one or more other features, steps, operations, elements, modules, items, components, and / or groups thereof. As used herein, the terms "or" and "and / or" are construed to be inclusive, or mean any one or any combination. Therefore, "A, B, or C" or "A, B, and / or C" means "any of the following: A; B; C; A and B; A and C; B and C; A, B, and C". Exceptions to this definition are only present when the combination of elements, functions, steps, or actions are inherently mutually exclusive.

[0031] The professional terms used herein are only used to refer to specific embodiments and are not intended to limit the disclosure. The singular form used herein, unless the context clearly indicates otherwise, also includes the plural form. The meaning of "comprising" used in the specification is to specify a particular feature, area, integer, step, operation, element and / or component, and not to exclude the presence or addition of other features, areas, integers, steps, operations, elements and / or components.

[0032] Although not differently defined, all terms including technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. Terms defined in commonly used dictionaries are to be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present disclosure, unless otherwise defined specifically herein, and are not to be interpreted in an ideal or overly formal sense.

[0033] The energy storage device mainly includes two parts, mainly the electrical bin and the battery bin. A large amount of heat will be generated during the charging and discharging process of the energy storage device. If it cannot be effectively dissipated in time, it will cause the device to overheat, thereby affecting its safety and stability. In addition, appropriate cooling also helps to improve the efficiency and performance of the energy storage system, prolong the service life of the device, reduce operating costs, and improve the utilization rate of the energy storage device.

[0034] But the cooling device in the prior art is mostly arranged in the electrical bin, which leads to a large space occupation of the electrical bin in the whole energy storage device, and also leads to a small proportion of the battery bin, thereby reducing the energy storage capacity of the energy storage device. But if the number of battery cells is increased, the volume of the energy storage device will be large, occupying more space.

[0035] Based on the above problems, the energy storage device provided by the embodiment of the present disclosure separates the cooling device from the energy storage box, and communicates with the plurality of battery packs in the battery compartment through the pipeline unit, so as to cool the battery pack, reduce the volume of the electrical compartment, improve the energy storage capacity of the energy storage device, or reduce the overall volume of the energy storage device to reduce the floor space occupied by the energy storage device. Through the cooperation of the temperature sensor and the electromagnetic valve in the control unit, the flow of the cooling liquid in the cooling device into the battery pack can change with the detection result of the internal temperature sensor, and the cooling effect of the cooling device on the energy storage device is further improved.

[0036] Figure 1 The overall structure of the energy storage device in the embodiment of the present disclosure is shown in FIG. 1. Figure 2 The structure of the connection between the pipeline unit and the battery pack in the energy storage device in the embodiment of the present disclosure is shown in FIG. 2. Figure 3 The structure of the connection between the pipeline unit, the cooling device and the battery pack in the energy storage device in the embodiment of the present disclosure is shown in FIG. 3. Figure 1 、 Figure 2 and Figure 3 In the examples, the energy storage device includes an energy storage box 10, a plurality of battery packs 20, and a pipeline unit 30. The energy storage box 10 includes a battery compartment 101. The plurality of battery packs 20 are arranged in the battery compartment 101. Each battery pack 20 includes a liquid injection pipe 21 and a liquid outlet pipe 22. The pipeline unit 30 is arranged in the battery compartment 101 and includes a liquid inlet pipe 31 and a liquid return pipe 32. The liquid inlet pipe 31 is connected to the liquid injection pipes 21 of the plurality of battery packs 20 and forms a liquid injection connection port 313 exposed on the surface of the energy storage box 10. The liquid return pipe 32 is connected to the liquid outlet pipes 22 of the plurality of battery packs 20 and forms a liquid return connection port 323 exposed on the surface of the energy storage box 10. The liquid injection connection port 313 is connected to the cooling liquid outlet 41 of the cooling device 40 arranged outside the energy storage box 10, and the liquid return connection port 323 is connected to the cooling liquid return port 42 of the cooling device 40.

[0037] The above arrangement has the advantages that the cooling device 40 is separated from the energy storage box 10, and the plurality of battery packs 20 in the battery compartment 101 are connected through the pipeline unit 30, so as to cool the battery pack 20, reduce the volume of the electrical compartment, improve the energy storage capacity of the energy storage device, or reduce the overall volume of the energy storage device to reduce the floor space occupied by the energy storage device.

[0038] Exemplarily, the energy storage box 10 further includes a device compartment 102. The device compartment 102 and the battery compartment 101 are formed by separating the inside of the energy storage box 10 into upper and lower parts.

[0039] Exemplarily, the liquid inlet pipe 31 comprises a liquid inlet main pipe 311 and a plurality of liquid inlet branch pipes 312; the liquid inlet main pipe 311 forms the liquid inlet connection port 313 at one end and is connected to the plurality of liquid inlet branch pipes 312 at the other end; the plurality of liquid inlet branch pipes 312 are connected to the liquid inlet pipes 31 of the plurality of battery packs 20. The liquid inlet branch pipe 312 comprises a plurality of liquid inlet ports 3121 for connecting the liquid inlet pipes 31 of the plurality of battery packs 20.

[0040] Exemplarily, the liquid return pipe 32 comprises a liquid return main pipe 321 and a plurality of liquid return branch pipes 322; the liquid return main pipe 321 forms the liquid return connection port 323 at one end and is connected to the plurality of liquid return branch pipes 322 at the other end; the plurality of liquid return branch pipes 322 are connected to the liquid return pipes 32 of the plurality of battery packs 20. The liquid return branch pipe 322 comprises a plurality of liquid collection ports 3221 for connecting the liquid return pipes 32 of the plurality of battery packs 20.

[0041] In Figure 2 In an example, the plurality of battery packs 20 are arranged in two rows in the battery compartment 101. The liquid inlet branch pipe 312 and the liquid return branch pipe 322 are implemented as two; the other end of the liquid inlet main pipe 311 is connected to the two liquid inlet branch pipes 312 through a tee joint; the other end of the liquid return main pipe 321 is connected to the two liquid return branch pipes 322 through a tee joint. Exemplarily, the liquid inlet port 3121 / liquid collection port 3221 can be directly connected to the liquid inlet pipe 31 / liquid return pipe 32 or connected to the liquid inlet pipe 31 / liquid return pipe 32 through a connecting hose.

[0042] Figure 4 In Figure 4 In an example, the plurality of battery packs 20A are arranged in two rows in the battery compartment 101; the area where the two rows of battery packs 20A are close to each other forms the liquid outlet pipe 22A; the liquid return pipe 32A is connected to the liquid outlet pipes 22A of the plurality of battery packs 20A and forms the liquid return connection port 323A at one end. Exemplarily, the liquid return pipe 32A comprises a plurality of liquid collection ports 321A for connecting the liquid outlet pipes of the plurality of battery packs 20A.

[0043] In another embodiment, the plurality of battery packs can also be arranged in multiple rows in the battery compartment; the number of liquid inlet branch pipes and liquid return branch pipes matches the number of rows of the plurality of battery packs.

[0044] Figure 5 In Figure 5In an example, the energy storage device further comprises a control unit 50 disposed in the energy storage tank. The control unit 50 comprises a controller 51, a plurality of temperature sensors 52 and a plurality of electromagnetic valves 53; the controller 51 is communicatively connected to the plurality of temperature sensors 52, electromagnetic valves 53 and the cooling device 40; each of the battery packs is provided with a temperature sensor 52, and each of the battery packs is provided with an electromagnetic valve 53 on the liquid inlet pipe or the liquid outlet pipe. Preferably, the electromagnetic valve 53 is disposed on the liquid inlet pipe of the battery pack.

[0045] In an example, the controller 51 can control the electromagnetic valve 53 on the battery pack with abnormal temperature to have a larger opening degree than the electromagnetic valve 53 on the battery pack with normal temperature according to the temperature data of the temperature sensors 52. The opening degree of the electromagnetic valve 53 can be as follows: the opening degree of the electromagnetic valve 53 on the battery pack with higher temperature is larger than the opening degree of the electromagnetic valve 53 on the battery pack with normal temperature; the electromagnetic valve 53 on the battery pack with higher temperature is open, and the electromagnetic valve 53 on the battery pack with normal temperature is closed (i.e. the opening degree of the electromagnetic valve 53 is zero).

[0046] In an example, the opening degree of the electromagnetic valve 53 is positively correlated with the temperature data of the temperature sensor 52 on the same battery pack. Those skilled in the art can understand that the opening degree of the electromagnetic valve 53 increases with the increase of the temperature of the temperature sensor 52 on the same battery pack, so as to increase the flow rate of the cooling liquid into the battery pack with higher temperature in the cooling device, and improve the cooling effect of the battery pack with higher temperature. Correspondingly, the controller 51 can relatively reduce the opening degree of the electromagnetic valve 53 on the battery pack with normal temperature, so as to meet the requirement that the cooling liquid in the pipeline unit is preferentially supplied to the battery pack with higher temperature.

[0047] The cooling device is communicatively connected to the controller 51. The cooling device and the energy storage box are both provided with data connectors (not shown in the figure), and the cooling device 40 and the energy storage box 10 are connected by a data line (not shown in the figure). When the temperature data of the temperature sensor 52 is abnormal, the controller 51 controls the cooling device to at least one of adjust the operating power or reduce the initial temperature of the cooling liquid. Those skilled in the art can understand that when the temperature sensor 52 detects that the temperature data of the battery pack is abnormal, the energy storage device can accelerate the flow rate of the cooling liquid in the pipeline unit and the battery pack by adjusting the operating power of the cooling device. The more heat the cooling liquid takes away from the battery pack in a unit of time, the faster the cooling effect on the battery pack is improved. Alternatively, the initial temperature of the cooling liquid in the cooling device is reduced. When the initial temperature of the cooling liquid is low, the cooling time required to reach the target temperature may be relatively short, so the cooling speed of the temperature abnormal battery pack can be accelerated and the cooling effect can be improved. The operating power of the cooling device and the initial temperature of the cooling liquid can also be adjusted at the same time to further improve the cooling effect on the battery pack.

[0048] The cooling device 40 is provided at the bottom with a plurality of universal wheels with brake function (not shown in the figure) to improve the convenience of moving the cooling device 40.

[0049] In summary, the energy storage device provided in the embodiment of the present disclosure includes an energy storage box, a plurality of battery packs, a pipeline unit, and a cooling device. The energy storage box includes a battery compartment. A plurality of battery packs are arranged in the battery compartment. Each battery pack includes a liquid injection pipe and a liquid outlet pipe. The pipeline unit is arranged in the battery compartment and includes a liquid inlet pipe and a liquid return pipe. The liquid inlet pipe is connected to the liquid injection pipes of the plurality of battery packs and forms a liquid injection connection port exposed on the surface of the energy storage box. The liquid return pipe is connected to the liquid outlet pipes of the plurality of battery packs and forms a liquid return connection port exposed on the surface of the energy storage box. The liquid injection connection port is connected to the cooling liquid outlet of the cooling device outside the energy storage box, and the liquid return connection port is connected to the cooling liquid return of the cooling device. The energy storage device provided in the embodiment of the present disclosure separates the cooling device from the energy storage box and connects the plurality of battery packs in the battery compartment through the pipeline unit. The cooling effect of the cooling device on the energy storage device is improved while the volume of the battery compartment is reduced, thereby improving the energy storage capacity of the energy storage device or reducing the overall volume of the energy storage device to reduce the floor space occupied by the energy storage device. Through the cooperation of the temperature sensor and the electromagnetic valve in the control unit, the flow rate of the cooling liquid in the cooling device flowing into the battery pack can change with the detection result of the temperature sensor inside, thereby further improving the cooling effect of the cooling device on the energy storage device.

[0050] The above embodiments are only illustrative of the principles of the present disclosure and its effects, and are not intended to limit the present disclosure. Any modification or change made by any person skilled in the art without departing from the spirit and scope of the present disclosure shall be covered by the protection scope of the present disclosure.

Claims

1. An energy storage device, characterized by, The application relates to a storage battery device, comprising: a storage battery box, including a battery compartment; a plurality of battery packs arranged in the battery compartment, each of the battery packs including a liquid injection pipe and a liquid outlet pipe; a pipe unit arranged in the battery compartment, including a liquid inlet pipe and a liquid return pipe; the liquid inlet pipe is connected with the liquid injection pipes of the battery packs and forms a liquid injection connecting port exposed on the surface of the storage battery box; the liquid return pipe is connected with the liquid outlet pipes of the battery packs and forms a liquid return connecting port exposed on the surface of the storage battery box; the liquid injection connecting port is connected with the cooling liquid outlet of a cooling device arranged outside the storage battery box, and the liquid return connecting port is connected with the cooling liquid return port of the cooling device.

2. The energy storage device of claim 1, wherein, The liquid inlet pipe includes a liquid inlet main pipe and a plurality of liquid inlet branch pipes; one end of the liquid inlet main pipe forms the liquid injection connecting port, and the other end is connected with the liquid inlet branch pipes; the liquid inlet branch pipes are connected with the liquid injection pipes of the battery packs.

3. The energy storage device of claim 2, wherein, The liquid inlet branch pipe includes a plurality of liquid injection ports for connecting the liquid injection pipes of the battery packs.

4. The energy storage device of claim 1, wherein, The liquid return pipe includes a liquid return main pipe and a plurality of liquid return branch pipes; one end of the liquid return main pipe forms the liquid return connecting port, and the other end is connected with the liquid return branch pipes; the liquid return branch pipes are connected with the liquid return pipes of the battery packs.

5. The energy storage device of claim 4, wherein, The liquid return branch pipe includes a plurality of liquid collection ports for connecting the liquid return pipes of the battery packs.

6. The energy storage device of claim 1, wherein, The storage battery device further includes a device compartment, and the device compartment and the battery compartment are formed by dividing the inside of the storage battery box into upper and lower parts.

7. The energy storage device of claim 1, wherein, The battery packs are arranged in two rows in the battery compartment; the battery packs in the two rows are arranged close to each other, and the close area forms the liquid outlet pipes; the liquid return pipe is connected with the liquid outlet pipes of the battery packs and forms the liquid return connecting port at one end.

8. The energy storage device of claim 7, wherein, The liquid return pipe includes a plurality of liquid collection ports for connecting the liquid return pipes of the battery packs.

9. The energy storage device of claim 1, wherein, The storage battery device further includes a control unit; the control unit is connected with the cooling device.

10. The energy storage device of claim 9, wherein, The control unit includes a controller, a plurality of temperature sensors and a plurality of electromagnetic valves; the controller is connected with the temperature sensors, the electromagnetic valves and the cooling device; each of the battery packs is provided with a temperature sensor, and each of the liquid inlet pipes or liquid outlet pipes of the battery packs is provided with an electromagnetic valve.

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