Household energy storage system supporting hot plug

Abstract

The invention relates to the technical field of household energy storage, in particular to a household energy storage system supporting hot plugging, which comprises a power distribution bracket, a controller arranged on the left upper part of the power distribution bracket, an EMS system arranged on the controller, a main relay J0 arranged in the controller, a plurality of supporting plates arranged in the middle of the power distribution bracket, and a battery pack inserted on the supporting plates, a normally open sub-relay is arranged in each battery pack, and the household energy storage system works by the following steps: starting up the controller, shutting down the controller, inserting a single battery pack and pulling out the single battery pack, the plurality of battery packs are arranged, and the battery packs are connected with the power distribution bracket, so that plug-and-play can be realized, and capacity expansion and efficiency improvement can be performed according to actual requirements; the battery pack is taken out to be used in different scenes, the safety is high, power is cut off in the whole plugging process, and potential safety hazards are avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of home energy storage, and specifically provides a home energy storage system supporting hot plugging and unplugging. Background Art

[0002] In recent years, with the increasing power demand, the scale of the power system has been expanding day by day, the complexity of the power grid has become greater, users have gradually attached importance to the reliability of power supply, and have begun to pursue power quality. At the same time, smart grids, renewable energy, and distributed energy have increased the demand for energy storage technologies, and people have begun to pay attention to the research on large-capacity energy storage technologies. The application market of the research results of energy storage systems is very wide, from home energy storage systems to large-capacity energy storage power stations, all of which are the application scopes of large-capacity energy storage systems. Home energy storage devices are usually divided into generator sets independent of the normal power supply, dedicated power supply lines effectively independent of the normal power supply in the power supply network, storage batteries, etc.

[0003] However, with the increasingly wide application of home energy storage systems and more and more energy storage systems put into operation, on the one hand, they themselves occupy a large space, reducing the utilization rate of the room itself, and they usually appear in the form of energy storage cabinets, which are usually not coordinated with the layout of the room itself; on the other hand, fire and explosion accidents caused by the energy storage system itself are also more frequent, mainly because high-energy-density energy storage devices, such as batteries, have a risk of thermal runaway due to various reasons. Most of the home energy storage systems on the market are stacked, and the effects of plug-and-play and capacity expansion and efficiency improvement cannot be achieved. Summary of the Invention

[0004] The purpose of the present invention is to provide a home energy storage system supporting hot plugging and unplugging to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A home energy storage system supporting hot plugging and unplugging includes a power distribution bracket. A controller is provided at the upper left of the power distribution bracket. The controller is provided with an EMS system. A main relay J0 is provided inside the controller. A plurality of support plates are provided in the middle of the power distribution bracket. Battery packs are plugged on the support plates. Normally open branch relays are provided inside the battery packs. The operation of the home energy storage system includes the following steps:

[0006] Controller startup: Before the controller starts up, the branch relays in each battery pack are in the off state. Press the startup button, and the first battery pack starts, enabling the 48V busbar to start. Other battery packs are activated by the voltage of this busbar, and at the same time, the EMS starts to detect the voltage of the total positive and total negative. When a stable voltage is detected for 10S, an output signal is used to control the main relay J0 to close, and the system starts to operate;

[0007] Controller shutdown: Press the shutdown button, the EMS output signal controls the main relay J0 to disconnect, and then sends a shutdown command to each battery pack, and the entire system shuts down;

[0008] Single battery pack insertion: main relay J0 disconnected - sub-relay disconnected - battery pack inserted - battery pack started - main relay J0 energized - system working;

[0009] Single battery pack pulled out: main relay J0 disconnected - battery pack shut down - battery pack pulled out - sub-relay closed - main relay J0 closed - system working

[0010] Preferably, an electromagnetic lock is provided between the power distribution bracket and the battery pack, and the main relay J0 is connected to the electromagnetic lock. The electromagnetic lock is used to lock and fix the battery pack. The battery pack can only be inserted or removed when the main relay is disconnected.

[0011] Preferably, after the battery pack is locked, the EMS starts the main relay J0 according to the total positive and negative voltages after detection. When the battery pack is released from the electromagnetic lock, the EMS disconnects the main relay J after detection and gives protection information that the battery pack is not in place.

[0012] Preferably, a micro switch is provided at the rear end of the side of the battery pack, and the micro switch controls a sub-relay. After the battery pack and the power distribution bracket are plugged into each other, the micro switch controls the sub-relay to disconnect. When the battery pack is pulled out, the micro switch controls the sub-relay to close.

[0013] Preferably, when all the battery packs are in place and the total positive and negative voltages are stable S, the EMS controls the main relay to close.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The battery packs of the present invention are all plugged into the power distribution bracket and stacked on each other, which reduces the space occupied, has high safety, can be installed outdoors, and increases the utilization rate of the house;

[0015] 2. It supports hot-swap, which is convenient for capacity expansion. When in use, you can unplug one of the battery packs while it is charged, go out for fun, and plug it directly into the original system when you come back. It can be directly integrated into the original system and used normally, realizing multiple uses of one machine, and different numbers of battery packs can be set according to actual needs.

[0016] 3. When one of the battery packs is not properly plugged in, the main relay cannot be closed, ensuring the safety of the battery pack while also ensuring that the battery pack can be charged. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a connection diagram of the battery energy storage system.

[0018] Figure 2 This is a schematic diagram of the power connection between the power distribution bracket and the battery pack of the present invention.

[0019] In the figure: 1 is the power distribution bracket, 2 is the controller, and 3 is the battery pack. Specific implementation manner

[0020] In order to deepen the understanding and recognition of the present invention below, the technical solutions in the embodiments of the present invention will be clearly and completely described and introduced in combination with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments, and no formal restrictions are imposed on this embodiment. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present invention.

[0021] Please refer to Figure 1-2 , the present invention provides a technical solution: a home energy storage system supporting hot plugging, including a power distribution bracket 1. A controller 2 is provided in the upper left of the power distribution bracket 1. The controller 2 is provided with an EMS system. A main relay J0 is provided in the controller 2. A plurality of support plates are provided in the middle of the power distribution bracket 1. A battery pack 3 is inserted on the support plate. The support plate supports the battery pack 3. A normally open sub-relay is provided in the battery pack 3. The sub-relay is used to control the connection between the battery pack 3 and the main circuit network. The operation of the home energy storage system includes the following steps:

[0022] The controller 2 is powered on: Before the controller 2 is powered on, the sub-relays in each battery pack 3 are in the off state. Press the power-on button, and the first battery pack 3 starts, enabling the 48V busbar to start. The other battery packs 3 are activated by the voltage of this busbar, and the EMS starts at the same time. The voltages of the total positive and total negative are detected. When a stable voltage is detected for 10S, a signal is output to control the main relay J0 to close, and the system starts to operate;

[0023] The controller 2 is powered off: Press the power-off button, the EMS outputs a signal to control the main relay J0 to disconnect, and then sends a power-off command to each battery pack 3, and the entire system shuts down;

[0024] Insertion of a single battery pack 3: The main relay J0 is disconnected - the sub-relay is disconnected - the battery pack 3 is inserted - the battery pack 3 starts - the main relay J0 is attracted - the system operates;

[0025] Removal of a single battery pack 3: The main relay J0 is disconnected - the battery pack 3 is powered off - the battery pack 3 is removed - the sub-relay is attracted - the main relay J0 is attracted - the system operates.

[0026] An electromagnetic lock is provided between the power distribution bracket 1 and the battery pack 3. The main relay J0 is connected to the electromagnetic lock. The electromagnetic lock is used to lock and fix the battery pack 3. When the main relay is disconnected, the electromagnetic lock releases the lock on the battery pack 3, and then the battery pack 3 can perform the insertion or extraction operation, ensuring safety during the insertion and extraction of the battery pack 3 and facilitating the application of the battery pack in various places. For example, when camping outdoors, power supply can be provided through the battery pack 3.

[0027] After the battery pack 3 is locked, the EMS detects it and then starts the main relay J0 according to the voltage of the total positive and total negative. When the battery pack 3 is released from the electromagnetic lock, the EMS detects it and disconnects the main relay J0, and at the same time gives the protection information that the battery pack 3 is not in place.

[0028] A micro switch is additionally provided at the side end of the battery pack 3. The micro switch controls the sub-relay. After the battery pack 3 and the power distribution bracket 1 are inserted into each other, the micro switch controls the sub-relay to disconnect, so that the circuit of the battery pack 3 is connected to the main circuit, facilitating subsequent charging. When the battery pack 3 is pulled out, the micro switch controls the sub-relay to be attracted, enabling the battery pack 3 to discharge externally.

[0029] When all battery packs 3 are in place and the total positive and total negative voltages are stable for 10S, the EMS controls the main relay to close, ensuring that after the battery pack 3 is plugged into the power distribution bracket, it can be installed in place and the battery pack 3 is smoothly connected to the main circuit.

[0030] Although the embodiments of the present invention have been shown and described, it should be emphasized that the above description is only an introduction and description of the usage mode of the embodiments of the present invention, and does not impose any formal restrictions on the present invention. For those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hot-pluggable home energy storage system, comprising a power distribution bracket (1), characterized in that: There is a controller (2) provided at the upper left of the power distribution bracket (1). The controller (2) is equipped with an EMS system. There is a main relay J0 inside the controller (2). There are multiple support plates in the middle of the power distribution bracket (1), and battery packs (3) are inserted into the support plates. There is a normally open sub-relay inside the battery pack (3). The operation of the home energy storage system includes the following steps: Controller (2) powers on: Before the controller (2) powers on, the sub-relays in each battery pack (3) are in the off state. Press the power-on button, and the first battery pack (3) starts, enabling the 48V busbar to start. The other battery packs (3) are activated by the voltage of this busbar, and the EMS also starts. The voltage of the total positive and total negative is detected. When a stable voltage is detected for 10S, a signal is output to control the main relay J0 to close, and the system starts to operate; Controller (2) powers off: Press the power-off button, the EMS outputs a signal to control the main relay J0 to disconnect, and then sends a power-off command to each battery pack (3), and the entire system shuts down; Insert a single battery pack (3): Main relay J0 disconnects - sub-relay disconnects - battery pack (3) is inserted - battery pack (3) starts - main relay J0 pulls in - system operates; Remove a single battery pack (3): Main relay J0 disconnects - battery pack (3) shuts down - battery pack (3) is removed - sub-relay pulls in - main relay J0 pulls in - system operates.

2. The hot-swappable household energy storage system according to claim 1, characterized in that: There is an electromagnetic lock between the power distribution bracket (1) and the battery pack (3). The main relay J0 is connected to the electromagnetic lock. The electromagnetic lock is used to lock and fix the battery pack (3). Only when the main relay is disconnected can the battery pack (3) perform the insertion or removal operation.

3. The hot-pluggable home energy storage system according to claim 2, characterized in that: After the battery pack (3) is locked, the EMS detects and then starts the main relay J0 according to the voltage of the total positive and total negative. When the battery pack (3) is released from the electromagnetic lock, the EMS detects and disconnects the main relay J0, and at the same time gives a protection message that the battery pack (3) is not in place.

4. A hot-pluggable home energy storage system according to claim 1, characterized in that: A microswitch is provided at the rear of the side end of the battery pack (3). The microswitch controls the sub-relay. After the battery pack (3) and the power distribution bracket (1) are inserted into each other, the microswitch controls the sub-relay to disconnect. When the battery pack (3) is removed, the microswitch controls the sub-relay to pull in.

5. The hot-swappable household energy storage system according to claim 1, wherein: When all the battery packs (3) are in place and the voltage of the total positive and total negative is stable for 10S, the EMS controls the main relay to close.

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