CN220291736U

CN220291736U - Energy storage device and energy storage system

Info

Publication number: CN220291736U
Application number: CN202321635368.6U
Authority: CN
Inventors: 欧鹏杰
Original assignee: Shenzhen Haichen Energy Storage Technology Co ltd
Current assignee: Shenzhen Haichen Energy Storage Technology Co ltd
Priority date: 2023-06-26
Filing date: 2023-06-26
Publication date: 2024-01-02
Anticipated expiration: 2033-06-26

Abstract

The application relates to an energy storage device and an energy storage system, wherein the energy storage device comprises a converging sub-device and a power supply sub-device. The converging sub-device is used for converting a positive power supply signal input by the positive power supply input interface into a pre-charging signal; the power supply electronic device is configured with a positive input interface, a negative input interface, a positive power supply interface and a negative power supply interface, wherein the positive input interface and the positive power supply interface are used for accessing a positive power supply signal or a pre-charging signal to the energy storage equipment; the negative input interface and the negative power supply interface are used for connecting a negative power supply signal to the energy storage device so that the energy storage device stores energy according to the positive power supply signal or the pre-charging signal and the negative power supply signal. The internal structure of the electronic device is simplified, and the overhaul efficiency of the electronic device is improved. When the electronic device is integrally packaged into the high-voltage box, the internal structure of the high-voltage box is also simplified, and the maintenance efficiency of the high-voltage box can be improved.

Description

Energy storage device and energy storage system

Technical Field

The application relates to the technical field of large-scale energy storage equipment, in particular to an energy storage device and an energy storage system.

Background

In the energy storage technical field, before the large-scale energy storage power station system starts high-voltage transmission, the energy storage power station system needs to be pre-charged, so that a pre-charging loop is an indispensable part of the large-scale energy storage power station system.

The high-voltage box corresponding to each battery cluster in the existing large-scale energy storage power station system is required to be provided with an independent pre-charging loop for pre-charging, so that the internal circuit structure of the high-voltage box is complex, when a certain high-voltage box fails, all circuit devices in the high-voltage box are required to be overhauled, and the problem of low overhauling efficiency exists.

Disclosure of Invention

Based on this, it is necessary to provide an energy storage device and an energy storage apparatus in view of the above technical problems.

In a first aspect, the present application provides an energy storage device comprising:

a bus sub-device configured with a positive power input interface, a negative power input interface, a positive power output interface, and a negative power output interface, the bus sub-device being configured to convert a positive power signal input by the positive power input interface into a precharge signal; the positive power supply output interface is used for outputting a positive power supply signal or the precharge signal input through the positive power supply input interface, and the negative power supply input interface is used for outputting a negative power supply signal input through the positive power supply input interface;

a power supply device configured with a positive input interface, a negative input interface, a positive power supply interface, and a negative power supply interface; the positive input interface is connected with the positive power supply interface and is used for connecting the positive power supply output interface to access the positive power supply signal or the precharge signal to the energy storage equipment; the negative input interface is connected with the negative power supply interface and is used for connecting the negative power supply output interface to access the negative power supply signal to the energy storage device so that the energy storage device stores energy according to the positive power supply signal or the pre-charging signal and the negative power supply signal.

In one embodiment, the electronic device includes a first body configured with the positive input interface, the negative input interface, the positive power interface, and the negative power interface, the electronic device including:

the first switch module is arranged on the first body, one end of the first switch module is connected with the negative input interface and is used for switching on and off the connection between the negative input interface and the negative power supply interface;

and the safety module is arranged on the first body, is respectively connected with the other end of the first switch module and the negative power supply interface, and is used for disconnecting the connection between the negative input interface and the negative power supply interface when the current value of the negative power supply signal is larger than a safety threshold value.

In one embodiment, the number of the first bodies, the positive power supply output interfaces and the negative power supply output interfaces is plural, the positive power supply output interfaces are correspondingly connected with the positive input interfaces in the first bodies, and the negative power supply output interfaces are correspondingly connected with the negative input interfaces in the first bodies.

In one embodiment, the bus sub-device includes a second body configured with a positive power input interface, a negative power input interface, a plurality of positive power output interfaces, and a plurality of negative power output interfaces; the bus bar sub-device includes:

The pre-charging circuit is arranged on the second body, the input end of the pre-charging circuit is connected with the positive power input interface, and a plurality of output ends of the pre-charging circuit are correspondingly connected with the plurality of positive power output interfaces; the precharge circuit is used for converting an accessed positive power supply signal into a precharge signal and outputting the precharge signal through at least one of a plurality of positive power supply output interfaces;

the second switch module is arranged on the second body, the input end of the second switch module is connected with the positive power input interface, a plurality of output ends of the second switch module are correspondingly connected with the positive power output interfaces, and the second switch module is used for switching on and off the connection between the positive power input interface and at least one positive power output interface so as to input the positive power signal to at least one of the positive input interfaces of the first bodies.

In one embodiment, the precharge circuit includes:

the pre-charging protection module is connected with the positive power input interface at one end and used for converting the positive power signal into the pre-charging signal;

the input end of the pre-charging switch module is connected with the other end of the pre-charging protection module, and a plurality of output ends of the pre-charging switch module are correspondingly connected with the positive power output interfaces and are used for connecting the on-off pre-charging protection module with the positive power output interfaces.

In one embodiment, the priming switch module includes:

and the other switch contact of each relay is used as a plurality of output ends of the pre-charging switch module.

In one embodiment, the second body includes a first face and a second face opposite to each other and spaced apart from each other;

the first face is provided with the positive power input interface and the negative power input interface which are spaced apart, and the second face is provided with the plurality of positive power output interfaces and the plurality of negative power output interfaces which are spaced apart; the third face is provided with the pre-charging circuit and the second switch module.

In one embodiment, the first body includes fourth and fifth faces disposed opposite and spaced apart;

the fourth surface is provided with the positive input interface and the negative input interface which are spaced;

the fifth surface is provided with the positive power supply interface and the negative power supply interface which are spaced.

In one embodiment, one end of the first switch module is connected with the negative input interface through a copper bar;

The positive input interface is connected with the positive power supply interface through a copper bar.

In a second aspect, the present application also provides an energy storage system comprising:

an energy storage device as described above;

and the energy storage devices are used for storing energy according to the received negative power supply signal and the positive power supply signal or the precharge signal.

The energy storage device comprises a converging sub-device and a power supply sub-device. The bus sub-device is configured with a positive power input interface, a negative power input interface, a positive power output interface and a negative power output interface, and is used for converting a positive power signal input by the positive power input interface into a pre-charging signal; the positive power supply output interface is used for outputting a positive power supply signal or a precharge signal input through the positive power supply input interface, and the negative power supply input interface is used for outputting a negative power supply signal input through the positive power supply input interface; the power supply electronic device is configured with a positive input interface, a negative input interface, a positive power supply interface, and a negative power supply interface; the positive input interface is connected with the positive power supply interface and is used for connecting the positive power supply output interface to access a positive power supply signal or a pre-charging signal to the energy storage equipment; the negative input interface is connected with the negative power supply interface and is used for connecting the negative power supply output interface to access a negative power supply signal to the energy storage equipment so that the energy storage equipment stores energy according to the positive power supply signal or the pre-charging signal and the negative power supply signal. Therefore, the bus electronic device performs the pre-charging processing on the positive power supply signal to convert the positive power supply signal into the pre-charging signal, and a module for performing the pre-charging processing on the accessed positive power supply signal is not required to be arranged in the power supply device. That is, when the electronic device is integrally packaged into the high-voltage tank, the internal structure of the high-voltage tank is also simplified, so that the maintenance efficiency of the high-voltage tank can be improved.

Drawings

FIG. 1 is a schematic diagram of an energy storage device according to an embodiment of the present disclosure;

FIG. 2 is a schematic diagram of an electronic device according to an embodiment of the present disclosure;

FIG. 3 is a schematic diagram of a bus bar device according to an embodiment of the present disclosure;

FIG. 4 is a schematic diagram of a precharge circuit according to an embodiment of the present application;

FIG. 5 is a schematic structural diagram of a second body according to an embodiment of the present disclosure;

FIG. 6 is a schematic structural diagram of a first body according to an embodiment of the present application;

FIG. 7 (a) is a schematic diagram of an energy storage system according to an embodiment of the present disclosure;

fig. 7 (b) is a second schematic structural diagram of an energy storage system according to an embodiment of the present application.

Reference numerals illustrate:

100. an energy storage device; 110. a bus sub-device; 111. a positive power input interface; 112. a negative power input interface; 113. a positive power output interface; 114. a negative power output interface; 115. a second body; 116. a precharge circuit; 1161. a pre-charging protection module; 1162. a pre-charge switch module; 1151. a first face; 1152. a second face; 1153. a third face; 117. a second switch module; 120. an electronic device; 121. a positive input interface; 122. a negative input interface; 123. a positive power supply interface; 124. a negative power supply interface; 125. a first body; 126. a first switch module; 127. an insurance module; 128. a fourth face; 129. a fifth surface; 200. an energy storage device; 10. an energy storage system; 510. a first switching relay; 520. a second switching relay; 710. a junction box; 720. a high pressure tank; 730. a battery cluster.

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 the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," etc. indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, 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 meaning of "plurality" is at least two, such as two, three, etc., unless explicitly defined otherwise.

In this application, unless specifically stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; 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, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via 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 when 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. When 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 are used herein for illustrative purposes only and are not meant to be the only embodiment.

The energy storage device can be applied to a large energy storage power station system. The large-scale energy storage power station system comprises a direct current side and an alternating current side, wherein the direct current side is a battery compartment, and the battery compartment comprises a battery, a temperature control device, a fire protection device, a confluence cabinet, a high-voltage box and other equipment; the alternating current side is an electric appliance bin, and the electric appliance bin comprises an energy storage converter, a transformer, a high-voltage box and other equipment. In order to enable a large energy storage power station system to adapt to more application scenarios, such as being applicable to power stations of fire power, wind power, solar energy, etc., or islands in the sea, communities, schools, factories, large load centers, etc., it is necessary to simplify the infrastructure construction cost of the high-voltage box, reduce the construction period, improve the modularization degree, and simplify the installation steps. Because of the limited wall surface in the high-pressure box, which can provide the installation and fixation of each device, the depth of the cabinet body is generally required to be set large enough under the condition of limiting the height of the high-pressure box so as to realize the installation and fixation of enough equipment devices. However, setting the depth of the high-pressure tank large enough and setting the equipment devices large enough causes inconvenience in mounting the devices and also inconvenience in maintenance at a later stage. Therefore, the application provides an energy storage device and an energy storage system, which can simplify the internal structure of a high-pressure tank and improve the maintenance efficiency of the high-pressure tank.

Referring to fig. 1, fig. 1 shows a schematic structural diagram of an energy storage device according to an embodiment of the present application, and an energy storage device 100 according to an embodiment of the present application includes a bus sub-device 110 and an electric power supply device 120. The bus sub-device 110 is configured with a positive power input interface 111, a negative power input interface 112, a positive power output interface 113 and a negative power output interface 114, and the bus sub-device 110 is configured to convert a positive power signal input by the positive power input interface 111 into a precharge signal; the positive power output interface 113 is used for outputting a positive power signal or a precharge signal input through the positive power input interface 111, and the negative power input interface 112 is used for outputting a negative power signal input through the positive power input interface 111; the power supply electronic device 120 is configured with a positive input interface 121, a negative input interface 122, a positive power supply interface 123, and a negative power supply interface 124; the positive input interface 121 is connected with the positive power supply interface 123 and is used for connecting the positive power supply output interface 113 to access a positive power supply signal or a pre-charging signal to the energy storage device; the negative input interface 122 is connected to the negative power supply interface 124, and is configured to connect to the negative power output interface 114 to access the negative power signal to the energy storage device, so that the energy storage device stores energy according to the positive power signal or the precharge signal, and the negative power signal.

The bus electronic device 110 can be integrally packaged as a bus cabinet, and the electronic device 120 can be integrally packaged as a high-voltage box.

The positive power input interface 111 and the negative power input interface 112 of the bus sub-device 110 are also used for connecting an energy storage converter ((Power Conversion System, PCS), and the PCS can realize conversion of alternating current and direct current voltage, so that the output positive power signal and the output negative power signal can meet application requirements.

In this embodiment, the bus sub-device 110 performs pre-charging processing on the positive power supply signal, so that the positive power supply signal is converted into a pre-charging signal, and the bus sub-device 110 is configured with a positive power supply input interface 111 and a negative power supply input interface 112, and can be connected to the energy storage converter through the positive power supply input interface 111 and the negative power supply input interface 112 to access the positive power supply signal and the negative power supply signal input by the energy storage converter. Meanwhile, the bus sub-device 110 is configured with a positive power output interface 113 and a negative power output interface 114, so that the precharge signal converted by the processing of the bus sub-device 110 can be output to the electronic device 120 through the positive power output interface 113, and the connected negative power signal is output to the electronic device 120 through the negative power output interface 114. The power electronics 120 is configured with a positive input interface 121 and a negative input interface 122, the positive input interface 121 being connectable with the positive power output interface 113 of the bus sub-arrangement 110 to receive a pre-charge signal or a positive power signal, the negative input interface 122 being connectable with the negative power output interface 114 of the bus sub-arrangement 110 to receive a negative power signal. The power supply device 120 is further configured with a positive power supply interface 123 and a negative power supply interface 124, the positive power supply interface 123 is connected with a positive electrode interface of the energy storage device to receive the pre-charging signal or the positive power supply signal, and the negative power supply interface 124 is connected with a negative electrode interface of the energy storage device to receive the negative power supply signal, so that the energy storage device can store energy according to the negative power supply signal and the pre-charging signal or the positive power supply signal. Therefore, since the bus electronic device 110 performs the pre-charging process on the positive power signal to convert the positive power signal into the pre-charging signal, a module for performing the pre-charging process on the accessed positive power signal is not required to be set in the electronic device 120, compared with the existing electronic device 120, the internal structure of the electronic device 120 is simplified, and the maintenance efficiency of the electronic device 120 is improved. That is, when the electronic device 120 is integrally packaged as a high-voltage tank, the internal structure of the high-voltage tank is also simplified, and thus the maintenance efficiency of the high-voltage tank can be improved.

It will be appreciated that, although the bus bar sub-device 110 of the present embodiment introduces the pre-charging processing function based on the bus bar function, thereby introducing the circuit device corresponding to the pre-charging processing function, since the bus bar sub-device 110 has fewer related devices for implementing the bus bar function, the bus bar sub-device 110 has a simple structure after introducing the circuit device corresponding to the pre-charging processing function, and the maintenance efficiency of the bus bar sub-device 110 is not reduced.

Referring to fig. 2, fig. 2 shows a schematic structural diagram of an electronic device in an embodiment of the present application, in one embodiment, the electronic device 120 includes a first body 125, a first switch module 126, and a safety module 127, where the first body 125 is configured with a positive input interface 121, a negative input interface 122, a positive power supply interface 123, and a negative power supply interface 124, and the electronic device 120 includes the first switch module 126 and the safety module 127. The first switch module 126 is disposed on the first body 125, and one end of the first switch module 126 is connected with the negative input interface 122, and is used for connecting the negative input interface 122 with the negative power supply interface 124; the safety module 127 is disposed on the first body 125, and is respectively connected to the other end of the first switch module 126 and the negative power supply interface 124, and is configured to disconnect the negative input interface 122 from the negative power supply interface 124 when the current value of the negative power supply signal is greater than the safety threshold.

The first body 125 may be understood as a box that accommodates the first switch module 126 and the safety module 127. The positive input interface 121, the negative input interface 122, the positive power supply interface 123 and the negative power supply interface 124 are embedded on the surface of the first body 125, so that the power supply device 120 can be connected with the busbar sub-device 110 and the energy storage equipment through the interfaces arranged on the surface of the first body 125, and the energy storage power station system can be assembled conveniently.

The first switch module 126 may be a total negative relay, and may be connected to a sub-battery management system that manages the power supply device 120, so that the sub-battery management system may be turned on or turned off when an instruction signal is sent to the total negative relay, so that the first switch module 126 may be connected to the negative input interface 122 and the negative power supply interface 124, and thus the energy storage device may receive a negative power supply signal when the first switch module 126 turns on the connection between the negative input interface 122 and the negative power supply interface 124, and stop receiving the negative power supply signal when the first switch module 126 turns off the connection between the negative input interface 122 and the negative power supply interface 124. In actual operation, the total battery management system sends a first control signal to the sub-battery management system of the electronic module, which is correspondingly connected with the energy storage device needing to store energy, at this time, the sub-battery management system receives the first control signal at a first moment, so as to output a first closing instruction to the first switch module 126, conduct the connection between the negative input interface 122 and the negative power supply interface 124, and before the convergence sub-device finishes conversion of the positive power supply signal, the energy storage device can store energy according to the pre-charging signal and the negative power supply signal.

The safety module 127 may be a fuse that automatically cuts off when the current value of the negative power signal is greater than a safety threshold, thereby disconnecting the negative input interface 122 from the negative power interface 124.

In this embodiment, the electronic device 120 includes a first body 125, a first switch module 126 and a safety module 127, where the first body 125 can accommodate the first switch module 126 and the safety module 127, the first switch module 126 can switch on and off the connection between the negative input interface 122 and the negative power supply interface 124 according to the instruction of the sub-battery management system, and the safety module 127 disconnects the connection between the negative input interface 122 and the negative power supply interface 124 when the current value of the negative power supply signal is greater than the safety threshold through the controllability of the electronic device 120, so that the safety module 127 can ensure that the current value of the negative power supply signal input to the energy storage device by the electronic device 120 is always within the safety threshold, thereby improving the stability of the energy storage device 100.

In one embodiment, one end of the first switch module is connected with the negative input interface through a copper bar; the positive input interface is connected with the positive power supply interface through a copper bar.

In this embodiment, since the internal structure of the electronic device is simplified, the use of copper bars can be reduced, and the first switch module and the negative input interface are connected through the copper bars, the positive input interface and the positive power supply interface, so that the negative power supply signal, the positive power supply signal and the precharge signal can be input to the energy storage device through the copper bars, and the stability of signal transmission is improved.

In one embodiment, the number of the first bodies, the positive power output interfaces and the negative power output interfaces is plural, the plural positive power output interfaces are correspondingly connected with the positive input interfaces in the plural first bodies, and the plural negative power output interfaces are correspondingly connected with the negative input interfaces in the plural first bodies.

In this embodiment, the plurality of first bodies are correspondingly connected with the plurality of battery clusters in the energy storage power station system, the plurality of positive power output interfaces are correspondingly connected with the positive input interfaces in the plurality of first bodies, and the plurality of negative power output interfaces are correspondingly connected with the negative input interfaces in the plurality of first bodies, so that the energy storage device can support power supply to the plurality of battery clusters.

Referring to fig. 3, fig. 3 shows a schematic structural diagram of a bus sub-device in an embodiment of the present application, in one embodiment, the bus sub-device 110 includes a second body 115, a precharge circuit 116, and a second switch module 117, and the second body 115 is configured with a positive power input interface 111, a negative power input interface 112, a plurality of positive power output interfaces 113 (only two of which are shown in fig. 3), and a plurality of negative power output interfaces 114 (only two of which are shown in fig. 3); the pre-charging circuit 116 is arranged on the second body 115, an input end of the pre-charging circuit 116 is connected with the positive power input interface 111, and a plurality of output ends of the pre-charging circuit 116 are correspondingly connected with the plurality of positive power output interfaces 113; the precharge circuit 116 is configured to convert the accessed positive power supply signal into a precharge signal and output the precharge signal through at least one of the plurality of positive power supply output interfaces 113; the second switch module 117 is disposed on the second body 115, and an input end of the second switch module 117 is connected to the positive power input interface 111, and a plurality of output ends (only two of which are shown in fig. 3) of the second switch module 117 are correspondingly connected to the plurality of positive power output interfaces 113 (only two of which are shown in fig. 3), so as to switch on and off the connection between the positive power input interface 111 and the at least one positive power output interface 113, so as to input a positive power signal to at least one of the positive input interfaces 121 of the plurality of first bodies 125.

The precharge circuit 116 may be connected to the positive power input interface 111 and the positive power output interfaces 113, the second switch module 117 may be connected to the positive power input interface 111, and the second switch module 117 may be connected to the positive power output interfaces 113 through copper bars.

The second body 115 described above may be understood as a case accommodating the second switching module 117 and the precharge circuit 116. The positive power input interface 111, the negative power input interface 112, the plurality of positive power output interfaces 113 and the plurality of negative power output interfaces 114 are embedded on the surface of the second body 115, so that the bus electronic device 110 can be connected with the energy storage converter and the power supply device 120 through interfaces arranged on the surface of the second body 115, respectively.

The precharge circuit 116 can perform a precharge process on the positive power signal according to the second control signal output by the overall battery management system at the second time, and convert the positive power signal into a precharge signal. Wherein the second moment is later than the first moment in the above embodiments. The energy storage device now stores energy based on the precharge signal and the negative power supply signal transmitted by the first body 125.

The second switch module 117 may be a plurality of total positive relays, where one switch contact of each total positive relay is used as an input terminal of the second switch module 117, and another switch contact of each total positive relay is used as a plurality of output terminals of the second switch module 117. The sub-battery management system managing the electronic device 120 is also connected to one of the plurality of total positive relays, which is connected to the first body 125 of the electronic device 120, and after the pre-charging circuit 116 completes the pre-charging process, the total battery management system sends a third control signal to the sub-battery management system at a third time (the third time is later than the second time described above), and the sub-battery management system outputs a second closing instruction to the second switch module 117 to conduct the connection between the positive power input interface 111 and the positive power output interface 113 of the first body 125, so as to output a positive power signal to the first body 125. The energy storage device stores energy based on the positive power signal and the negative power signal transmitted by the first body 125.

In this embodiment, the bus sub-device 110 includes a second body 115, a second switch module 117 and a pre-charging circuit 116, where the second body 115 can accommodate the second switch module 117 and the pre-charging circuit 116, and the pre-charging circuit 116 can perform pre-charging processing on a positive power signal to convert the positive power signal into a pre-charging signal, and at this time, the first body 125 receives the pre-charging signal, and the energy storage device stores energy according to the pre-charging signal and the negative power signal. When the precharge circuit 116 completes the precharge, the second switch module 117 conducts the connection between the positive power input interface 111 and the positive power output interface 113 of the first body 125 to output the positive power signal to the first body 125, and at this time, the energy storage device stores energy based on the positive power signal and the negative power signal transmitted by the first body 125. Through the above-mentioned confluence sub-device 110, the positive power signal can be precharged, and in the precharge process, the precharge signal and the negative power signal are input into the energy storage device connected with the first body 125, so that the energy storage device stores energy. After the pre-charging is completed, the positive and negative power signals are input into an energy storage device connected to the first body 125 to store energy in the energy storage device.

Referring to fig. 4, fig. 4 is a schematic diagram illustrating a structure of a precharge circuit according to an embodiment of the present application, and in one embodiment, the precharge circuit 116 includes a precharge protection module 1161 and a precharge switch module 1162. One end of the precharge protection module 1161 is connected to the positive power input interface 111, and is configured to convert a positive power signal into a precharge signal; the input end of the precharge switch module 1162 is connected with the other end of the precharge protection module 1161, and a plurality of output ends of the precharge switch module 1162 are correspondingly connected with the plurality of positive power supply output interfaces 113 for connecting the precharge protection module 1161 with the positive power supply output interfaces 113.

The precharge protection module 1161 may be a precharge resistor, and is configured to perform a shunting process (i.e., a precharge process) on the positive power supply signal to convert the positive power supply signal into a precharge signal. The precharge protection module 1161 may be connected to the positive power input interface 111 and the plurality of positive power output interfaces 113 through copper bars, so as to improve stability of signal transmission.

The precharge switch module 1162 may be connected to the precharge protection module 1161 and the plurality of positive power supply output interfaces 113 by copper bars.

The precharge switch module 1162 is connected with the total battery management system, and when receiving a second control signal output by the total battery management system at the second moment, the connection between the precharge protection module 1161 and the positive power output interface 113 is turned on, so that the precharge signal converted by the precharge protection module 1161 is output to the first body 125.

In this embodiment, the precharge circuit includes a precharge protection module 1161 and a precharge switch module 1162, where the precharge protection module 1161 can perform precharge processing on a positive power supply signal, so that the positive power supply signal is converted into a precharge signal, and when the precharge switch module 1162 is turned on, the precharge signal is input to the first body 125, so that the bus sub-device can implement a precharge processing function.

In one embodiment, the pre-charge switch module includes a plurality of relays, one switch contact of each relay serving as an input of the pre-charge switch module, and the other switch contact of each relay serving as a plurality of outputs of the pre-charge switch module.

In this embodiment, the pre-charge switch module includes a plurality of relays, one switch contact of each relay serving as an input terminal of the pre-charge switch module, and the other switch contact of each relay serving as a plurality of output terminals of the pre-charge switch module. The bus sub-device can be connected with the positive power supply output interfaces through the external control on-off pre-charging protection module, and flexibility of the bus sub-device is improved.

Referring to fig. 5, fig. 5 illustrates a schematic structural diagram of a second body in an embodiment of the present application, in one embodiment, the second body includes a first face 1151 and a second face 1152 that are opposite and spaced apart. The first face 1151 is provided with a positive power input interface 111 and a negative power input interface 112 spaced apart; the second face 1152 is provided with a plurality of spaced apart positive power output interfaces 113 and a plurality of spaced apart negative power output interfaces 114.

In this embodiment, the positive power input interface 111 and the negative power input interface 112 are disposed at intervals on the first surface 1151 of the second body, and the plurality of positive power output interfaces 113 and the plurality of negative power output interfaces 114 are disposed at intervals on the second surface 1152 opposite to and spaced from the first surface 1151, which is beneficial to reducing copper bars used for connection among modules, interfaces and circuits, saving cost, and facilitating installation connection between the second body and the first body.

In one embodiment, reference is continued to the structural schematic of the second body as shown in FIG. 5. The second body further includes a third face 1153 perpendicular to the first and second faces 1151, 1152; the third face 1153 is provided with a precharge circuit and a second switch module 117.

Wherein the precharge circuit and the second switch module 117 are insulated from each other. The precharge circuit of fig. 5 includes a precharge resistor R, a plurality of first switching relays 510; the second switching module 117 includes a plurality of second switching relays 520. The first switch relay 510, the pre-charging resistor R and the interfaces are connected by copper bars. The plurality of first switching relays 510 may function as the second switching module in the above-described embodiment; the plurality of second switching relays 520 may function as the precharge switching module in the above-described embodiment.

In this embodiment, the precharge circuit and the second switch module 117 are disposed on the third surface 1153 perpendicular to the first surface 1151 and the second surface 1152, which is beneficial to performing wire connection on the precharge circuit and the second switch module 117, and improving the stability of the precharge circuit and the second switch module 117 in the second body.

Referring now to fig. 6, fig. 6 illustrates a schematic view of a first body in an embodiment of the present application, in one embodiment, the first body includes a fourth face 128 and a fifth face 129 that are disposed opposite and spaced apart. Fourth face 128 is provided with spaced apart positive input interface 121 and negative input interface 122; the fifth face 129 is provided with a positive power interface 123 and a negative power interface 124 spaced apart.

In this embodiment, the positive input interface 121 and the negative input interface 122 are disposed on the fourth surface 128 of the first body at intervals, and the positive power supply interface 123 and the negative power supply interface 124 are disposed on the fifth surface 129 of the first body opposite to the fourth surface 128 and disposed at intervals, so as to facilitate the installation connection between the first body and the second body.

Referring to fig. 7 (a), fig. 7 (a) shows one of the schematic block diagrams of the energy storage system in an embodiment of the present application, and in one embodiment, each embodiment is described in detail: the energy storage system includes an anti-surge switch SPD, a bus 710, a high voltage tank 720, and a battery cluster 730.

The bus bar 710 is configured with a positive power input interface 111, a negative power input interface 112, a positive power output interface 113, and a negative power output interface 114 as bus sub-devices, including a first isolating switch QS1, a second isolating switch QS2, a first FUSE1, a second FUSE2, a third FUSE3, a fourth FUSE4, a precharge resistor R, a plurality of precharge relays Pre-relay, and a plurality of total positive relay Pos-relay. Wherein, the Pre-charging resistor R and the plurality of Pre-charging relays Pre-relay are used as the Pre-charging circuit 116 in the above embodiment, and the Pre-charging resistor R is used as the Pre-charging protection module in the above embodiment; a plurality of precharge relays Pre-relay as the precharge switch module in the above-described embodiment; the plurality of total positive electrode relays Pos-relay function as the second switching module 117 in the above-described embodiment.

Specifically, one end of the first isolating switch QS1 is connected to the positive electrode of the energy storage converter PCS through the positive power input interface 111 to receive a positive power signal, the other end of the first isolating switch QS1 is connected to one end of the first FUSE1, the other end of the first FUSE1 is connected to one end of the precharge resistor R and one end of the third FUSE3, the other end of the precharge resistor R is connected to the same switch contact of the precharge relays Pre-relay, the other end of the third FUSE3 is connected to the positive electrode of the anti-surge switch SPD, and the other switch contacts of the precharge relays Pre-relay are respectively connected to the positive output interfaces 113 in the bus cabinet 710; the same switch contact of the plurality of total positive relay Pos-relay is connected with one end of the first FUSE1 connected with the pre-charging resistor R, and the other switch contact of the plurality of total positive relay Pos-relay is respectively and correspondingly connected with the plurality of positive output interfaces 113 of the bus cabinet 710; one end of the second isolating switch QS2 is used for being connected with the negative electrode of the energy storage converter PCS through the negative power input interface 112 to receive negative power signals, the other end of the second isolating switch QS2 is used for being connected with a plurality of negative output interfaces 114 of the bus cabinet 710 and one end of the fourth FUSE4, and the other end of the fourth FUSE4 is connected with the negative electrode of the anti-surge switch SPD.

The high-voltage case 720 serves as a plurality of electron-donating devices 120, and is connected to a plurality of battery clusters 730, each battery cluster 730 serving as an energy storage device in the above-described embodiment, and the battery clusters 730 are configured with a positive electrode interface and a negative electrode interface. The high-voltage tank 720 includes a plurality of sub-high-voltage tanks, each configured with a plurality of positive input interfaces 121, a plurality of negative input interfaces 122, a plurality of positive power supply interfaces 123, and a plurality of negative power supply interfaces 124; each sub high-voltage box comprises a third isolating switch QS3, a fourth isolating switch QS4, a total negative relay Neg-relay, a fifth FUSE5, a sixth FUSE6 and two manual maintenance switches MSD. Wherein the total negative relay Neg-relay is used as the first switch module 126 in the above embodiment; the fifth FUSE5 serves as the FUSE module in the above embodiment.

Specifically, one end of the fourth disconnecting switch QS4 is connected to the negative input interface 122 of the terminal high-voltage box, the other end of the fourth disconnecting switch QS4 is connected to one switch contact of the total negative relay Neg-relay, the other switch contact of the total negative relay Neg-relay is connected to one end of the fifth FUSE5, and the other end of the fifth FUSE5 is connected to the negative power supply interface 124 of the sub high-voltage box; one end of the sixth FUSE6 is connected with the positive power supply interface 123 of the sub high-voltage box and one end of the third isolating switch QS3, and the other end of the third isolating switch QS3 is connected with the positive input interface 121 of the sub high-voltage box; the two ends of one manual maintenance switch MSD are connected with a negative input interface 122 and a negative power supply interface 124 of the high-voltage box; two ends of the other manual maintenance switch MSD are connected with the positive electrode interface and the negative electrode interface of the battery cluster 730.

The energy storage system in the embodiment meets the necessary requirement of Pre-charging, improves the utilization rate of the Pre-charging resistor R, and places the total positive relay Pos-relay and the Pre-relay of each sub-high-voltage box in the high-voltage box 720 in the prior art in the bus cabinet 710 through ingenious circuit design, so that the internal structure of each sub-high-voltage box is simplified, and the overhaul efficiency of the high-voltage box 720 and the installation efficiency of the energy storage system are improved; the amount of copper bars of each device in the high-voltage box of the connector is reduced, and the manufacturing cost of the high-voltage box 720 is reduced.

Referring to fig. 7 (b), fig. 7 (b) shows a second schematic structural diagram of an energy storage system according to an embodiment of the present application, where the energy storage system 10 includes the energy storage device 100 and a plurality of energy storage devices 200 (two of which are shown in the drawings) as described above, and each energy storage device 200 is configured to store energy according to a received negative power signal and a positive power signal or a pre-charge signal.

The plurality of energy storage devices 200 described above may be a plurality of battery clusters.

The energy storage system 10 of the present embodiment includes the energy storage device 100 and the plurality of energy storage apparatuses 200, and the structure of the power supply device used in the energy storage device 100 is simplified, so that the installation between the energy storage device 100 and each energy storage apparatus 200 is also simplified, and therefore, the assembly efficiency of the energy storage system 10 can be improved.

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 application. 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, the energy storage device comprising:

2. The energy storage device of claim 1, wherein the power supply device comprises a first body configured with the positive input interface, the negative input interface, the positive power supply interface, and the negative power supply interface, the power supply device comprising:

3. The energy storage device of claim 2, wherein the number of the first body, the positive power output interfaces and the negative power output interfaces is plural, the plurality of positive power output interfaces are correspondingly connected with the positive input interfaces in the plurality of first bodies, and the plurality of negative power output interfaces are correspondingly connected with the negative input interfaces in the plurality of first bodies.

4. The energy storage device of claim 3, wherein the bussing sub-device comprises a second body configured with a positive power input interface, a negative power input interface, a plurality of positive power output interfaces, and a plurality of negative power output interfaces; the bus bar sub-device includes:

5. The energy storage device of claim 4, wherein said pre-charge circuit comprises:

6. The energy storage device of claim 5, wherein the pre-charge switch module comprises:

7. The energy storage device of claim 4, wherein the second body includes first and second opposed and spaced apart faces;

the first surface is provided with the positive power input interface and the negative power input interface which are spaced;

The second surface is provided with a plurality of positive power output interfaces and a plurality of negative power output interfaces which are spaced apart.

8. The energy storage device of claim 7, wherein the second body further comprises a third face perpendicular to the first face and the second face;

the third face is provided with the pre-charging circuit and the second switch module.

9. The energy storage device of claim 2, wherein the first body includes fourth and fifth faces disposed opposite and spaced apart;

10. The energy storage device of claim 2, wherein one end of the first switch module is connected to the negative input interface through a copper bar;

11. An energy storage system, comprising:

an energy storage device as claimed in any one of claims 1 to 10;