Energy storage device and system

Abstract

The present invention provides an energy storage device and system, the energy storage device includes: an energy transmission module, an energy storage module and an interface module; wherein the energy transmission module and the energy storage module are connected together by a quick-plug connection through the interface module; the energy transmission module is used to transmit the electric energy in the energy storage module to the electric load; the energy transmission module is also used to transmit external electric energy to the energy storage module for storage; the interface module is used to adjust the number of batteries connected to the energy storage module according to a preset working standard. Compared with the prior art using a cable connection method, the present invention uses a quick-plug connection method to connect the energy storage module and the energy transmission module, which is not only quick and convenient but also avoids the situation of wrong connection. The number of batteries connected is also adjusted through the interface module, so that the output voltage of the energy storage device is adjustable and easy to maintain.

Description

Technical Field

[0001] The present invention relates to the field of energy storage, and in particular to an energy storage device and system. Background Art

[0002] As the country pays more attention to industries or fields such as new energy, smart energy, and energy storage, these industries have achieved rapid development in recent years. The increasingly prosperous various types of power generation devices have given rise to the development of energy storage devices.

[0003] At present, lithium iron phosphate batteries, as a form of energy storage, have attracted much attention and attention. However, lithium iron phosphate batteries have great safety hazards during installation and operation. Therefore, the cells are generally connected in series to form modules, and then the modules are connected in series to form a system. The modules are generally connected by cables, which are easy to be connected incorrectly during the installation process, resulting in short circuits, which in turn cause safety accidents and property losses. At the same time, the above method has low production efficiency and is not easy to maintain.

[0004] The above contents are only used to assist in understanding the technical solution of the present invention and do not constitute an admission that the above contents are prior art. Summary of the invention

[0005] The main purpose of the present invention is to provide an energy storage device and system, aiming to solve the technical problems of difficult maintenance and low production efficiency of energy storage devices in the prior art.

[0006] To achieve the above object, the present invention provides an energy storage device, which includes: an energy transmission module, an energy storage module and an interface module;

[0007] Wherein, the energy transmission module and the energy storage module are connected together by means of a quick plug connection through the interface module;

[0008] The energy transmission module is used to transmit the electric energy in the energy storage module to the electric load;

[0009] The energy transmission module is also used to transmit external electrical energy to the energy storage module for storage;

[0010] The interface module is used to adjust the number of batteries connected to the energy storage module according to a preset working standard.

[0011] Optionally, the interface module is composed of a plurality of switch circuits connected in series;

[0012] Wherein, the negative output end of the initial switch circuit is connected to the energy transmission module, and the positive output end of the terminal switch circuit is connected to the energy transmission module.

[0013] Optionally, the switch circuit includes: a bypass switch and a series switch;

[0014] Among them, one end of the bypass switch serves as the battery negative electrode access port and is connected to other switch circuits, one end of the series switch serves as the battery positive electrode access port, and the other end of the series switch is connected to the other end of the bypass switch and other switch circuits.

[0015] Optionally, the energy transmission module includes: a battery detection unit, a battery management unit, a switch unit, a charge and discharge unit, and a battery protection unit;

[0016] The battery detection unit is connected to the battery management unit and the battery protection unit respectively, the battery management unit is connected to the switch unit and the charge and discharge unit, the switch unit is connected to the battery protection unit and the charge and discharge unit, and the battery protection unit is connected to the interface module;

[0017] The battery detection unit is used to collect the electrical signal input from the energy storage module to the battery protection unit, and transmit the processed electrical signal to the battery management unit;

[0018] The battery management unit is used to control the switch unit and the charge and discharge unit according to the processed electrical signal;

[0019] The switch unit is used to control the on and off of the main circuit;

[0020] The charging and discharging unit is used to control the charging and discharging state of the energy storage device;

[0021] The battery protection unit is used to protect each module of the energy storage device from overcurrent and overvoltage.

[0022] Optionally, the battery protection unit includes: a circuit breaker and a fuse;

[0023] Among them, one end of the circuit breaker is connected to the interface module, the other end of the circuit breaker is connected to the switch unit, and the fuse is arranged on the positive main circuit between the circuit breaker and the switch unit.

[0024] Optionally, the switch unit includes: a positive main circuit switch and a negative main circuit switch;

[0025] Among them, one end of the positive main circuit switch and one end of the negative main circuit are both connected to the battery protection unit, and the other end of the positive main circuit switch and the other end of the negative main circuit are both connected to the charging and discharging unit.

[0026] Optionally, the energy storage module includes a plurality of battery units, and the battery unit is composed of a plurality of battery cells connected in series.

[0027] Optionally, the positive electrode of the battery cell is connected to the battery positive electrode access port of the switch circuit, and the negative electrode of the battery cell is connected to the battery negative electrode access port of the switch circuit, wherein one switch circuit corresponds to one battery cell.

[0028] Optionally, the energy transmission module further includes an energy transmission wall, and the interface module and the energy transmission module are both embedded in the energy transmission wall.

[0029] In addition, to achieve the above objectives, the present invention also provides an energy storage system, which includes the above energy storage device.

[0030] The present invention provides an energy storage device and an energy storage system, wherein the energy storage device comprises: an energy transmission module, an energy storage module and an interface module; wherein the energy transmission module and the energy storage module are connected together by means of a quick-plug connection through the interface module; the energy transmission module is used to transmit the electric energy in the energy storage module to the electric load; the energy transmission module is also used to transmit external electric energy to the energy storage module for storage; the interface module is used to adjust the number of batteries connected to the energy storage module according to a preset working standard. Compared with the prior art which uses a cable connection, the present invention uses a quick-plug connection to connect the energy storage module and the energy transmission module, which is not only quick and convenient but also avoids the situation of wrong connection. The number of batteries connected is also adjusted through the interface module, so that the output voltage of the energy storage device is adjustable and easy to maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0032] Figure 1 It is a structural schematic diagram of a first embodiment of an energy storage device of the present invention;

[0033] Figure 2 It is a structural schematic diagram of a second embodiment of an energy storage device of the present invention;

[0034] Figure 3 Schematic diagram of the circuit structure of the second embodiment of the energy storage device of the present invention.

[0035] Description of Figure Numbers:

[0036] Label name Label name 10 Energy storage module 20 Energy transmission module 21 Battery protection unit 22 Switching unit 23 Charge and discharge unit 24 Battery testing unit 25 Battery Management Unit K1 Bypass switch K2 Series switch QF1 breaker FU1 Fuse KM1 Positive main circuit switch KM2 Negative main circuit switch

[0037] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0038] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0039] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0040] Reference Figure 1 , Figure 1 This is a schematic diagram of the structure of the first embodiment of the energy storage device of the present invention, based on Figure 1 A first embodiment of the energy storage device of the present invention is proposed.

[0041] In this embodiment, the energy storage device includes: an energy transmission module 20, an energy storage module 10 and an interface module 30;

[0042] Wherein, the energy transmission module 20 and the energy storage module 10 are connected by a quick plug connection;

[0043] The energy transmission module 20 is used to transmit the electric energy in the energy storage module to the electric load;

[0044] The energy transmission module 20 is also used to transmit external electrical energy to the energy storage module 10 for storage;

[0045] The interface module 30 is used to adjust the number of batteries connected to the energy storage module 10 according to a preset working standard.

[0046] It should be noted that, in the present embodiment, the energy transmission module 20 refers to an energy transmission wall, which is constructed by prefabricating modules, and embedding components such as wiring harnesses and connectors in the energy transmission wall, and can be regarded as a whole; the energy storage module 10 is composed of multiple modules, and each module is composed of multiple battery cells connected in series; each module has reserved positive and negative contact points for connection with the energy transmission wall, and the energy transmission wall also has reserved holes for module insertion. The quick-plug access method refers to inserting the positive and negative contact points of the module into the corresponding holes of the energy transmission wall, without the need for connection through cables, connectors, etc., which is convenient and avoids the situation of wrong connection. The above-mentioned preset working standard, in the present embodiment, mainly refers to the preset output voltage or specific battery module. The interface module 30 can automatically adjust the module connected to the energy transmission module 20 according to work needs, and can also be adjusted manually.

[0047] It can be understood that the energy storage module 10 can be composed of lithium iron phosphate batteries or other storage materials; the energy transmission module 20 is mainly used to process the electric energy in the energy storage module 10 and output it to an external load, which can be a device to be charged or a device to be powered, and the output voltage will be adjusted according to the rated voltage of the load; the energy transmission module 20 can also be used as a charger for the energy storage module 10, storing the electric energy obtained from the outside through wind energy, solar energy, etc. in the storage module 10, realizing energy transfer and balancing the electricity demand in various places.

[0048] The present embodiment provides an energy storage device, the energy storage device comprising: an energy transmission module, an energy storage module and an interface module; wherein the energy transmission module and the energy storage module are connected together by means of a quick-plug connection through the interface module; the energy transmission module is used to transmit the electric energy in the energy storage module to the electric load; the energy transmission module is also used to transmit external electric energy to the energy storage module for storage; the interface module is used to adjust the number of batteries connected to the energy storage module according to a preset working standard. Compared with the prior art using a cable connection method, the present embodiment uses a quick-plug connection method to connect the energy storage module and the energy transmission module, which is not only quick and convenient but also avoids the situation of wrong connection. The number of batteries connected is also adjusted through the interface module, so that the output voltage of the energy storage device is adjustable and easy to maintain.

[0049] Reference Figure 2 , based on the above-mentioned first embodiment, a second embodiment of the energy storage device of the present invention is proposed.

[0050] In this embodiment, in the energy storage device, the energy transmission module 20 includes: a battery detection unit 24, a battery management unit 25, a switch unit 22, a charge and discharge unit 23 and a battery protection unit 21;

[0051] The battery detection unit 24 is connected to the battery management unit 25 and the battery protection unit 21 respectively, the battery management unit 25 is connected to the switch unit 22 and the charge and discharge unit 23, the switch unit 22 is connected to the battery protection unit 21 and the charge and discharge unit 23, and the battery protection unit 21 is connected to the interface module 30;

[0052] The battery detection unit 24 is used to collect the electrical signal input from the energy storage module 10 to the battery protection unit 21, and transmit the processed electrical signal to the battery management unit 25;

[0053] The battery management unit 25 is used to control the switch unit 22 and the charge and discharge unit 23 according to the processed electrical signal;

[0054] The switch unit 22 is used to control the on and off of the main circuit;

[0055] The charging and discharging unit 23 is used to control the charging and discharging state of the energy storage device;

[0056] The battery protection unit 21 is used to protect each module of the energy storage device from over-current and over-voltage.

[0057] It should be noted that the battery detection unit can detect the voltage output by the energy storage module 10, or detect the working state of the energy storage module 10, such as the charging state and the discharging state; the battery detection unit 24 will further process the detected electrical signal and transmit it to the battery management unit 24; the battery management unit 25 uses a controller, which is mainly used to manage the entire energy storage device. The controller can be composed of a control chip and other control circuits, and this embodiment does not limit this. The battery management unit 25 can also be equipped with a display screen to display the current working state of the energy storage device, and can also be equipped with buttons so that the staff can adjust and control according to the current working state of the energy storage device. The switch unit 22 can be automatically controlled by the battery management unit 25 according to the operating state of the energy storage device, or it can be controlled by the staff through the switch button; for example, when the battery detection unit 24 detects an abnormal voltage, the battery management unit 25 will control the switch of the switch unit 22 to disconnect, so as to protect the entire energy storage device. In this embodiment, the charging and discharging unit 23 is a bidirectional converter, which is integrated into the above-mentioned energy transmission wall and acts as a battery charger; the battery protection unit 21 is a protection circuit composed of various electronic components, which mainly plays a role in protecting the energy storage device to avoid safety accidents.

[0058] It is understandable that all the above-mentioned units and connectors or wiring harnesses are built into the energy transmission wall; the above-mentioned various units are preset in advance and do not require staff to adjust or connect them, which reduces the workload of staff and avoids the occurrence of wrong line connections.

[0059] Reference Figure 3 , in this embodiment, the interface module 30 is composed of a number of switch circuits connected in series;

[0060] Wherein, the negative output end of the initial switch circuit is connected to the energy transmission module, and the positive output end of the terminal switch circuit is connected to the energy transmission module.

[0061] It should be noted that the interface module 30 is arranged on the outer surface of the above-mentioned energy transmission wall, and is used to adjust the battery modules connected to the energy transmission module 20. For example, when a smaller input voltage is required, some battery modules can be cut off through the interface module 30. When some battery modules are low on power or fail, the battery modules can be cut off individually so that the staff can take out the battery modules for maintenance.

[0062] It can be understood that the interface module 30 is like a collective connection socket. By inserting the battery module in the energy storage module 10 into the interface module, the connection between the energy storage module 10 and the energy transmission module 20 is realized; wherein, the collective connection socket will lead out two wires as a positive main circuit line and a negative main circuit line for transmitting electric energy. In this embodiment, the positive main circuit line is led out from the positive output terminal of the above-mentioned terminal switch circuit, and the negative main circuit line is led out from the negative output terminal of the above-mentioned initial switch circuit. The connecting wires in this embodiment are all built into the energy transmission wall.

[0063] In this embodiment, the switch circuit includes: a bypass switch K1 and a series switch K2;

[0064] Among them, one end of the bypass switch K1 is used as the battery negative electrode access port and is connected to other switch circuits, one end of the series switch K2 is used as the battery positive electrode access port, and the other end of the series switch K2 is connected to the other end of the bypass switch K1 and other switch circuits.

[0065] It should be noted that the number of switching circuits is the number of battery modules of the energy storage module 10, one battery module corresponds to one switching circuit, and the positive and negative electrode access ports of the switching circuit are the interfaces between the energy storage module 10 and the energy transmission module 20; the positive and negative electrode access ports are arranged on the outer surface of the energy transmission wall to facilitate the insertion of the battery modules.

[0066] It can be understood that when the series switch of the switch circuit is closed, it means that the battery module corresponding to the switch circuit is connected to the energy transmission module 20, and the bypass switch of the switch circuit is used to connect the battery modules together to form an energy storage module.

[0067] In this embodiment, the battery protection unit 21 includes: a circuit breaker QF1 and a fuse FU1;

[0068] One end of the circuit breaker QF1 is connected to the voltage regulating unit 21 , the other end of the circuit breaker QF1 is connected to the switch unit 22 , and the fuse FU1 is arranged on the positive main circuit between the circuit breaker QF1 and the switch unit 22 .

[0069] It can be understood that the circuit breaker QF1 is controlled by the staff. In an emergency, when other buttons and automatic control devices are not working, the staff can stop the operation of the energy storage device through the circuit breaker; the circuit breaker is arranged on the main circuit of the energy storage module 10 and the energy transmission module 20, and can completely cut off the input of the energy storage module 10; the fuse FU1 is also arranged on the main circuit, and in this embodiment, it is specifically arranged on the positive main circuit, which can automatically cut off the connection between the energy storage module 10 and the energy transmission module when the current or voltage in the energy storage device is too large, and also plays a protective role.

[0070] In this embodiment, the switch unit 22 includes: a positive main circuit switch KM1 and a negative main circuit switch KM2;

[0071] Among them, one end of the positive main circuit switch KM1 and one end of the negative main circuit are both connected to the battery protection unit 21, and the other end of the positive main circuit switch KM2 and the other end of the negative main circuit are both connected to the charging and discharging unit 23.

[0072] It can be understood that the positive main circuit switch KM1 and the negative main circuit switch KM2 are both controlled by the battery management unit 25. The staff can control the positive main circuit switch KM1 and the negative main circuit switch KM2 through the battery management unit 25 according to specific work needs; the battery management unit 25 can also automatically control the state of the energy storage device detected by the battery detection unit 24.

[0073] This embodiment uses a quick-plug connection method to connect the energy storage module and the energy transmission module. A battery detection unit, a battery management unit, a switch unit, a charge and discharge unit, and a battery protection unit are embedded in the above-mentioned energy wall. This is not only quick and convenient but also avoids wrong connection, thereby improving the production efficiency of the energy storage device and reducing safety issues during the production and transportation of the energy storage device.

[0074] In addition, to achieve the above-mentioned purpose, the present invention also provides an energy storage system, which includes the above-mentioned energy storage system device. The specific embodiments of the energy storage system refer to the embodiments of the above-mentioned energy storage device and are not repeated here.

[0075] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

[0076] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0077] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0078] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. An energy storage device, characterized in that: The energy storage device comprises: an energy transmission module, an energy storage module and an interface module; Wherein, the energy transmission module and the energy storage module are connected together by means of a quick plug connection through the interface module; The energy transmission module is used to transmit the electric energy in the energy storage module to the electric load; The energy transmission module is also used to transmit external electrical energy to the energy storage module for storage; The interface module is used to adjust the number of batteries connected to the energy storage module according to a preset working standard; The interface module is composed of a number of switch circuits connected in series; Wherein, the negative output end of the initial switch circuit is connected to the energy transmission module, and the positive output end of the terminal switch circuit is connected to the energy transmission module; The switch circuit includes: a bypass switch and a series switch; Among them, one end of the bypass switch serves as the battery negative electrode access port and is connected to other switch circuits, one end of the series switch serves as the battery positive electrode access port, and the other end of the series switch is connected to the other end of the bypass switch and other switch circuits.

2. The energy storage device according to claim 1, characterized in that The energy transmission module includes: a battery detection unit, a battery management unit, a switch unit, a charge and discharge unit and a battery protection unit; The battery detection unit is connected to the battery management unit and the battery protection unit respectively, the battery management unit is connected to the switch unit and the charge and discharge unit, the switch unit is connected to the battery protection unit and the charge and discharge unit, and the battery protection unit is connected to the interface module; The battery detection unit is used to collect the electrical signal input from the energy storage module to the battery protection unit, and transmit the processed electrical signal to the battery management unit; The battery management unit is used to control the switch unit and the charge and discharge unit according to the processed electrical signal; The switch unit is used to control the on and off of the main circuit; The charging and discharging unit is used to control the charging and discharging state of the energy storage device; The battery protection unit is used to protect each module of the energy storage device from overcurrent and overvoltage.

3. The energy storage device according to claim 2, characterized in that The battery protection unit includes: a circuit breaker and a fuse; Among them, one end of the circuit breaker is connected to the interface module, the other end of the circuit breaker is connected to the switch unit, and the fuse is arranged on the positive main circuit between the circuit breaker and the switch unit.

4. The energy storage device according to claim 3, characterized in that The switch unit comprises: a positive main circuit switch and a negative main circuit switch; Among them, one end of the positive main circuit switch and one end of the negative main circuit are both connected to the battery protection unit, and the other end of the positive main circuit switch and the other end of the negative main circuit are both connected to the charging and discharging unit.

5. The energy storage device according to claim 4, characterized in that The energy storage module includes a plurality of battery units, and the battery unit is composed of a plurality of battery cells connected in series.

6. The energy storage device according to claim 5, characterized in that The positive electrode of the battery unit is connected to the battery positive electrode access port of the switch circuit, and the negative electrode of the battery unit is connected to the battery negative electrode access port of the switch circuit, wherein one switch circuit corresponds to one battery unit.

7. The energy storage device according to claim 6, characterized in that The energy transmission module further comprises an energy transmission wall, and the interface module and the energy transmission module are both embedded in the energy transmission wall.

8. An energy storage system, characterized in that: The energy storage system comprises the energy storage device according to any one of claims 1-7.

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