CN115868096A

CN115868096A - First power supply, control method thereof, second power supply and energy storage device

Info

Publication number: CN115868096A
Application number: CN202280004447.9A
Authority: CN
Inventors: 雷云; 张智锋; 欧阳明星
Original assignee: Shenzhen Carku Technology Co Ltd
Current assignee: Shenzhen Carku Technology Co Ltd
Priority date: 2022-04-19
Filing date: 2022-04-19
Publication date: 2023-03-28
Also published as: WO2023201533A1

Abstract

The application provides a first power supply and control method, second power supply and energy storage equipment thereof, wherein, first power supply can be dismantled with the second power supply and be connected, and first power supply includes: a first energy storage bank; the first interface is connected with the first energy storage group and is used for being connected with a second interface of a second power supply, and the second interface is connected with a second energy storage group of the second power supply; and the first master control circuit is used for enabling the first energy storage group and the second energy storage group to be connected in parallel so as to utilize the first energy storage group and the second energy storage group which are connected in parallel to supply power to the outside. Can dismantle with the second power through first power and be connected for first power and second power can supply power alone, and can be when the second interface connection through first interface and second power, make first energy storage group and second energy storage group realize parallelly connected external power supply, aim at improving the adaptability of energy storage equipment to the application scene.

Description

First power supply, control method thereof, second power supply and energy storage device

Technical Field

The present application relates to the field of power supply technologies, and in particular, to a first power supply, a control method thereof, a second power supply, and an energy storage device.

Background

At present, in order to meet the requirements of users on electric quantity in different application scenes, various energy storage devices are provided. Such as a common outdoor energy storage power supply and an indoor energy storage power supply. Wherein, outdoor energy storage power is for the ease of carrying for energy storage capacity and output are all restricted, lead to unable satisfied electric quantity demand when indoor use. And the demand of user to the electric quantity is considered to indoor energy storage power, and its volume that corresponds is great usually, is unfavorable for the open air to carry.

Technical problem

The existing energy storage equipment has poor adaptability to application scenes.

Technical solution

The application mainly aims to provide a first power supply, a second power supply and an energy storage device, and aims to improve the adaptability of the energy storage device to application scenes.

In a first aspect, the present application provides a first power supply detachably connectable to a second power supply, the first power supply comprising:

a first energy storage bank;

the first interface is connected with the first energy storage group, the first interface is used for being connected with a second interface of the second power supply, and the second interface is connected with a second energy storage group of the second power supply;

and the first master control circuit is used for enabling the first energy storage group and the second energy storage group to be connected in parallel so as to utilize the first energy storage group and the second energy storage group which are connected in parallel to supply power to the outside.

In a second aspect, the present application provides a first power source detachably connectable to a second power source, the first power source comprising:

a first energy storage bank;

the first interface is connected with the first energy storage group and used for being connected with a second interface of the second power supply, so that the first energy storage group is controllably connected with the second energy storage group of the second power supply in parallel, and power is supplied to the outside based on the first energy storage group and the second energy storage group which are connected in parallel.

In a third aspect, the present application provides a second power source detachably connectable to a first power source, the second power source comprising:

a second energy storage bank;

the second interface is connected with the second energy storage group, the second interface is used for being connected with a first interface of the first power supply, and the first interface is connected with the first energy storage group of the first power supply;

when the second interface is connected with the first interface, the second energy storage group can be controllably connected in parallel with the first energy storage group of the first power supply, so that the first energy storage group and the second energy storage group which are connected in parallel are utilized to supply power to the outside.

In a fourth aspect, the present application provides a method for controlling an energy storage power supply, which is applied to the first power supply of the first aspect; the method comprises the following steps:

when detecting that a first interface of the first power supply is connected with a second interface of the second power supply, connecting the first energy storage group and the second energy storage group in parallel;

the first energy storage group and the second energy storage group which are connected in parallel are used for supplying power to the outside;

wherein the second power source is connected to the first power source when the first interface is connected to the second interface.

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

a first power supply as described above in relation to the first aspect;

the second power supply comprises a second energy storage group and a second interface, and the second interface is electrically connected with the second energy storage group;

the second power supply can be detachably connected with the first power supply, and when the second power supply is connected with the first power supply, the second interface is connected with the first interface of the first power supply.

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

a first power supply;

a second power supply as described above in the second aspect;

the first power supply can be detachably connected with the second power supply, and when the first power supply is connected with the second power supply, a first interface of the first power supply is connected with a second interface of the second power supply.

Advantageous effects

The application provides a first power supply and control method, second power supply and energy storage equipment thereof, wherein, first power supply can be dismantled with the second power supply and be connected, and first power supply includes: a first energy storage bank; the first interface is connected with the first energy storage group and is used for being connected with a second interface of a second power supply, and a second interface of the second power supply is connected with a second energy storage group of the second power supply; and the first master control circuit is used for enabling the first energy storage group and the second energy storage group to be connected in parallel so as to utilize the first energy storage group and the second energy storage group which are connected in parallel to supply power to the outside. Can dismantle with the second power through first power and be connected for first power and second power can supply power alone, and can be when the second interface connection through first interface and second power, make first energy storage group and second energy storage group realize parallelly connected external power supply, aim at improving the adaptability of energy storage equipment to the application scene.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic block diagram of an energy storage device provided in an embodiment of the present application;

FIG. 2 is a schematic block diagram of an energy storage device provided by another embodiment of the present application;

FIG. 3 is a schematic block diagram of an energy storage device provided by yet another embodiment of the present application;

FIG. 4 is a schematic block diagram of a second power supply provided by an embodiment of the present application;

FIG. 5 is a schematic block diagram of a second power supply provided by yet another embodiment of the present application;

FIG. 6 is a schematic block diagram of a first power supply provided by yet another embodiment of the present application;

FIG. 7 is a schematic block diagram of an energy storage device formed by the second power supply of FIG. 5 and the first power supply of FIG. 6;

FIG. 8 is a schematic block diagram of a first power supply provided by yet another embodiment of the present application;

FIG. 9 is a schematic block diagram of a first power supply provided by yet another embodiment of the present application;

FIG. 10 is a schematic block diagram of a first power supply provided by yet another embodiment of the present application;

FIG. 11 is a schematic block diagram of a first power supply provided by yet another embodiment of the present application;

FIG. 12 is a schematic block diagram of a first power supply provided by yet another embodiment of the present application;

FIG. 13 is a schematic block diagram of a second power supply provided by yet another embodiment of the present application;

FIG. 14 is a schematic block diagram of a first power supply provided by yet another embodiment of the present application;

FIG. 15 is a schematic block diagram of a second power supply provided by yet another embodiment of the present application;

FIG. 16 is a schematic diagram of the interface between the first power source and the second power source according to an embodiment of the present application;

FIG. 17 is a schematic diagram illustrating the connection between a first power source and a second power source according to yet another embodiment of the present application;

fig. 18 is a schematic flow chart illustrating an implementation of a method for controlling an energy storage power supply according to an embodiment of the present application;

description of reference numerals:

100. an energy storage device;

10. a first power supply; 20. a second power supply;

110. a first energy storage bank; 120. a first interface; 130. a first master control circuit; 140. a third interface; 141. a fifth interface; 142. a sixth interface; 160. a first communication port; 170. an AC input port; 180. an AC output port; 111. a charging interface circuit; 112. a rectifying circuit; 113. a switching circuit; 114. fixing the interface; 115. a first positive terminal; 116. a first negative terminal; 117. a second switching device; 118. an inverter circuit; 112. a rectifying circuit;

210. a second energy storage bank; 220. a second interface; 230. a mains supply interface; 240. a first switching device; 250. a second communication port; 260. a second master control circuit; 270. a fourth interface; 280. a first DC conversion circuit; 212. a second DC conversion circuit; 213. a second positive terminal; 214. a second negative terminal.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The flow diagrams depicted in the figures are merely illustrative and do not necessarily include all of the elements and operations/steps, nor do they necessarily have to be performed in the order depicted. For example, some operations/steps may be decomposed, combined or partially combined, so that the actual execution sequence may be changed according to the actual situation.

Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

Referring to fig. 1, fig. 1 is a schematic block diagram of an energy storage device according to an embodiment of the present disclosure. As can be seen from fig. 1, the energy storage device 100 includes a first power source 10 and a second power source 20. The first power supply 10 and the second power supply 20 are detachably connected, and when the first power supply 10 is connected to the second power supply 20, the first interface 120 of the first power supply is connected to the second interface 220 of the second power supply.

As shown in fig. 1, the first power supply 10 includes a first energy storage group 110, a first interface 120, and a first master control circuit 130; the second power supply 20 includes a second energy storage bank 210 and a second interface 220.

The first interface 120 is configured to be connected to a second interface 220 of the second power supply 20, and the second interface 220 is connected to a second energy storage unit 210 of the second power supply 20. The first master control circuit 130 is configured to connect the first energy storage group 110 and the second energy storage group 210 in parallel, so as to use the first energy storage group 110 and the second energy storage group 210 connected in parallel to supply power to the outside. To improve the adaptability of the energy storage device 100 to the power supply scenario. Specifically, the first power source 10 is a portable outdoor energy storage power source, and the second power source 20 is an indoor energy storage power source suitable for being fixedly placed and used in various scenes such as homes, enterprises, shops, and the like. When a user needs to use an outdoor power supply, the portable first power supply 10 can be directly carried; when a user needs to use indoors and needs a large amount of electricity or large power, if the amount of electricity or the power of the second power supply 20 cannot meet the current indoor use requirement of the user, the first power supply 10 may be connected to the second power supply 10, and the electricity of the first energy storage group 110 and the second energy storage group 210 after being connected in parallel is used for supplying power, so as to meet the current indoor use requirement of the user. The above is only one application scenario of the embodiment of the present application, and the embodiment of the present application does not limit that the second power supply 20 must be used indoors, and the second power supply 20 may also be an energy storage power supply suitable for portable outing.

That is, the energy storage device 100 provided in the above embodiment, through detachable connection between the first power supply 10 and the second power supply 20, enables the first power supply 10 and the second power supply 20 to independently supply power, and when the first interface 120 is connected to the second interface 220 of the second power supply 20, the first energy storage group 110 and the second energy storage group 210 are enabled to supply power in parallel to the outside, so as to improve the flexibility of power supply of the energy storage device and the adaptability to the application scenario.

In an embodiment, the first main control circuit 130 is configured to connect the first energy storage group 110 and the second energy storage group 210 in parallel when the ac load is powered by the mains power, so as to supply power to the ac load by using the first energy storage group 110 and the second energy storage group 210 in parallel, or supply power to the ac load by using the first energy storage group 110 or the second energy storage group 210 alone.

It should be understood that, to enable the first energy storage group 110 and the second energy storage group 210 to supply power to the ac load in parallel, the difference between the voltages of the first energy storage group 110 and the second energy storage group 210 should be smaller than the preset difference, as known from the operation principle of parallel batteries. Specifically, before the first and

second banks

110 and 210 are controlled to be connected in parallel by the first master circuit 130, a voltage difference between the first and

second banks

110 and 210 may be determined by the first master circuit 130, and when the voltage difference between the first and

second banks

110 and 210 is not within a preset difference range, the first and/or

second banks

110 and 210 may be controlled to be charged. The smaller the voltage difference between the first energy storage group 110 and the second energy storage group 210 is, the higher the safety of the parallel circuit is, and therefore, the preset difference may be a value close to zero, for example, 0.1,0.02, and the like. In addition, the preset difference value may also be zero.

For example, the first master control circuit 130 is configured to connect the first energy storage group 110 and the second energy storage group 210 in parallel when a voltage difference between the first energy storage group 110 and the second energy storage group 210 is smaller than a preset difference, so as to supply power to the outside by using the first energy storage group 110 and the second energy storage group 210 connected in parallel.

In an embodiment, the first main control circuit 130 is configured to, when the voltage difference between the first energy storage group 110 and the second energy storage group 210 is greater than a preset difference, control the energy storage group with a larger voltage value in the first energy storage group 110 and the second energy storage group 210 to supply power to the outside until the voltage difference between the first energy storage group 110 and the second energy storage group 210 is smaller than the preset difference. It should be understood that after the voltage difference between the first energy storage group 110 and the second energy storage group 210 is smaller than the preset difference, the first main control circuit 130 may control the first energy storage group 110 and the second energy storage group 210 to be connected in parallel, so as to utilize the first energy storage group 110 and the second energy storage group 210 connected in parallel to supply power to the outside. To allow flexibility in power supply.

In addition, the first main control circuit 130 may further control the energy storage group with a larger voltage value in the first energy storage group 110 and the second energy storage group 210 to charge the energy storage group with a smaller voltage value when the voltage difference between the first energy storage group 110 and the second energy storage group 210 is greater than the preset difference value, until the voltage difference between the first energy storage group 110 and the second energy storage group 210 is smaller than the preset difference value. It should be understood that when the voltage difference between the first energy storage group 110 and the second energy storage group 210 is large, a large current is generated, so that there is a risk of burning out elements and wires in the energy storage device. Therefore, when the voltage difference between the first energy storage group 110 and the second energy storage group 210 is greater than the preset difference, the external power supply can be performed through the energy storage group with a large control voltage value, or the energy storage group with a small voltage value is charged through the energy storage group with a large control voltage value, and the external power supply is performed in parallel after the voltage difference is less than the preset difference, so that the flexibility of the external power supply is realized, the power supply safety is improved, and the service life of the energy storage device is prolonged.

The first energy storage group 110 includes, but is not limited to, one or more of a lead-acid battery, a nickel-based battery, a lithium-based battery, a flow battery, a sodium-sulfur battery, or a super capacitor. The second energy storage bank 210 includes, but is not limited to, one or more of a lead-acid battery, a nickel-based battery, a lithium-based battery, a flow battery, a sodium-sulfur battery, or a super capacitor. It should be understood that, in order to enable the first energy storage group 110 and the second energy storage group 210 connected in parallel to supply power to the outside, the first energy storage group 110 and the second energy storage group 210 correspond to energy storage batteries of the same category. Specifically, the first master circuit 130 of the first energy storage group 110 may connect the first energy storage group 110 and the second energy storage group 210 in parallel by controlling the switching device. Alternatively, the switching device may be provided in the first power supply 10 or the second power supply 20. In the embodiment of the present application, in order to make the first power supply 10 more conveniently portable outdoors, it is preferable that the switching device is provided within the second power supply 20.

Specifically, as shown in fig. 2, fig. 2 is a schematic block diagram of an energy storage device provided in another embodiment of the present application.

As can be seen from fig. 2, in the present embodiment, a first switching device 240 is provided in the second power supply 20, and the first power supply 10 further includes a first communication port 160. Wherein the first communication port 160 is for communicating with the second power supply 20; the first master control circuit 130 transmits a first communication signal to the second power supply 20 through the first communication port 160 to control the first switching device 240 in the second power supply 20 to be turned on, so that the first energy storage group 10 and the second energy storage group 20 are connected in parallel. The external power supply based on the first energy storage group 110 and the second energy storage group 210 which are connected in parallel is realized, or the external power supply based on the energy storage group with a larger voltage value in the first energy storage group 110 and the second energy storage group 210 is realized, so that the adaptability of the energy storage device to the application scene is effectively improved.

Further, as can be seen from fig. 2, the first communication port 160 is integrated in the first interface 120, and it should be understood that the first communication port 160 may be a communication port separate from the first interface 120, and may be disposed at any position of the first power supply 10.

Specifically, as shown in fig. 2, the first switching device 240 is disposed in a path where the second energy storage group 220 is connected to the second interface 220, and the first switching device 240 is used to control a parallel connection state of the first energy storage group 110 and the second energy storage group 210.

Illustratively, the first switching device 240 may include a switching element. The first switching device 240 may be disposed between the positive electrode of the first energy storage group 110 and the positive electrode of the second energy storage group 210, or disposed between the negative electrode of the first energy storage group 110 and the negative electrode of the second energy storage group 210. When the first main control circuit 130 controls the switching element to be closed, the first switching device 240 is turned on, so that the first energy storage group 110 is connected to the second energy storage group 210. In this way, the parallel connection of the first energy storage group 110 and the second energy storage group 210 is realized.

According to the analysis, the energy storage device provided by the embodiment of the application can be detachably connected with the second power through the first power, so that the first power and the second power can be independently supplied with power respectively, and the first energy storage group and the second energy storage group can be externally supplied with power in parallel when being connected with the second interface of the second power through the first interface, so that the flexibility of power supply of the energy storage device and the adaptability to an application scene are improved.

Referring to fig. 3, fig. 3 is a schematic block diagram of an energy storage device according to another embodiment of the present application. As can be seen from fig. 3, in the present embodiment, the second power supply 20 further includes a second communication port 250. Wherein the second communication port 250 is used for communication with the first power supply 10. Specifically, the second communication port 250 is configured to receive a first communication signal sent by the first power supply 10, and the first communication signal is configured to turn on the first switching device 130, so that the first energy storage group 10 and the second energy storage group 20 are connected in parallel.

Illustratively, as can be seen from fig. 3, the first power supply 10 can communicate with the second power supply 20 by providing the first communication port 160 on the first power supply 10 and the second communication port 250 on the second power supply 20. Specifically, the first master control circuit 130 transmits a first communication signal to the second communication port 250 through the first communication port 160 to control the first switching device 240 in the second power supply 20 to be turned on, so that the first energy storage group 110 and the second energy storage group 210 are connected in parallel.

It should be understood that when the first power supply 10 and the second power supply 20 are detached from the connection state to the disconnection state, the first master circuit 130 of the first power supply 10 and the second master circuit 260 of the second power supply 20 both detect that the communication signal is disconnected, and correspondingly, the first master circuit 130 may send a control signal to control the switching element in the first switching device 240 to be disconnected. The switching element includes, but is not limited to, a relay, a transistor, a diode, a MOS transistor, or the like.

Illustratively, the first communication port 160 may be integrated within the first interface 120 or may be a communication port separate from the first interface 120; similarly, the second communication port 250 may be integrated into the second interface 220 or may be independent of the communication port of the second interface 220.

In some embodiments, the first energy storage group 110 and the second energy storage group 210 may be connected in parallel by providing the second master control circuit 260 in the second power supply 20, receiving a first communication signal transmitted from the first master control circuit 130 to the second communication port 250 through the first communication port 160 by the second master control circuit 260, and controlling the first switching device 240 to be turned on according to the first communication signal.

For example, the first switching device 240 may also be disposed in the first power supply 10 (not shown in the figure), and specifically may be disposed in a path where the first energy storage group 110 is connected to the first interface 120, and the first main control circuit 130 controls the first switching device 240 to be turned on, so that the first energy storage group 110 is connected in parallel with the second energy storage group 210. The operation principle of the first switching device 240 disposed in the first power supply 10 is similar to that of the second power supply 20, and is not described herein again.

For example, in addition to the first switching device 240, a switching circuit may be disposed in the first power supply 10, and the switching circuit is disposed in a path between the first energy storage group 110 and the mains power interface and a path between the second energy storage group 210 and the mains power interface, so that when the switching circuit controls the first energy storage group 110 and the second energy storage group 210 to be both connected with the mains power interface, the first energy storage group 110 and the second energy storage group 210 may be powered in parallel or charged in parallel. In addition to the mains interface, the above described approach can also be extended to other types of input or output interfaces.

Exemplarily, as shown in fig. 4, fig. 4 is a schematic block diagram of a second power supply provided by an embodiment of the present application. As shown in fig. 4, the second power supply 10 further includes a second main control circuit 260, the second main control circuit 260 is connected to the second communication port 250 and the first switching device 240, and the second main control circuit 260 receives the first communication signal sent by the first main control circuit 130 through the second communication port 250, and controls the first switching device 240 to be turned on according to the first communication signal, so that the first energy storage group 110 and the second energy storage group 210 are connected in parallel. So as to utilize the first energy storage group 110 and the second energy storage group 210 after being connected in parallel to supply power to the outside.

It should be understood that when the first power supply 10 and the second power supply 20 are connected, the first interface 120 and the second interface 220 are connected, and if the switching element of the first switching device 240 disposed in the path where the second energy storage group 210 is connected to the second interface 220 is in the off state, the first energy storage group 110 and the second energy storage group 210 are only connected, but are in the non-parallel state.

It should be understood that only when the voltage difference between the first energy storage group 110 and the second energy storage group 210 is smaller than the preset difference, the second energy storage group 210 is controllably connected in parallel with the first energy storage group 110, so as to supply power to the outside by using the first energy storage group 110 and the second energy storage group 210 connected in parallel. This is because if the voltage difference between the first energy storage group 110 and the second energy storage group 210 is too large, a large current may be generated, so that the battery is damaged, for example, the large current may burn out circuit components and circuits, and for example, the large current may rapidly increase the temperature of the energy storage component, so that the energy storage component is damaged. Therefore, the pressure difference of the two energy storage groups is controlled within a preset range, and the safety of the first energy storage group and the second energy storage group in a scene of parallel connection and external power supply or parallel connection and simultaneous charging is guaranteed.

In addition, the second power supply 20 provided in the embodiment of the present application may also be used to supply power to an ac load by using the first energy storage group 110 and the second energy storage group 210 connected in parallel when the ac load is powered by the mains.

Illustratively, as shown in fig. 5, fig. 5 is a circuit schematic diagram of another embodiment of the second power supply of fig. 1. As can be seen from fig. 5, in the present embodiment, the second power supply 20 further includes a mains interface 230 and a fourth interface 270. The utility power interface 230 is connected to the fourth interface 270, and is configured to supply power to the ac load by using the first energy storage group 110 and the second energy storage group 210 connected in parallel when the utility power fails to supply power to the ac load. Specifically, when the first power supply 10 is connected to the second power supply 20, the fourth interface 270 is connected to the third interface 140 of the first power supply 10, and the third interface 140 is connected to the first energy storage group 110 of the first power supply 10, so as to transmit the electric energy that can be provided by the first energy storage group 110 and the second energy storage group 210 after being connected in parallel to the second power supply 20 through the fourth interface 270, so as to supply power to the ac load through the utility power interface 230 of the second power supply 20 when the utility power fails to supply power to the ac load. In particular, see fig. 6 and 7. Fig. 6 is a circuit diagram of another embodiment of the first power supply in fig. 1. Fig. 7 is a schematic structural diagram of an embodiment of an energy storage device composed of the second power supply in fig. 5 and the first power supply in fig. 6.

Illustratively, the connection between the third interface 140 and the fourth interface 270 may include a magnetic connection or a pluggable connection. Specifically, the utility power interface 230 may be connected to a household socket, and the first master control circuit 130 is configured to charge the first energy storage set 110 and/or the second energy storage set 210 through the utility power interface 230, or perform indoor power supply through the utility power interface 230 when the utility power fails. The adaptability of the energy storage device to the use scene is improved.

Specifically, the utility power interface 230 may be connected to the first power supply 10 through the third interface 140, so that the electric energy provided by the first energy storage group 110 and the second energy storage group 210 after being connected in parallel is output through the utility power interface 230 through the third interface 140 to supply power to the ac load connected to the utility power interface 230.

Exemplarily, as shown in fig. 6, fig. 6 is a schematic block diagram of a first power supply provided by an embodiment of the present application. As shown in fig. 6, the first power supply 10 further includes a third interface 140, where the third interface 140 is connected to the first energy storage group 110, and is used for transmitting the electric energy that can be provided by the first energy storage group 110 and the second energy storage group 210 after being connected in parallel to the second power supply 20, so as to supply power to the ac load through the utility power interface 230 of the second power supply 20. The ac load may be various household appliances connected to the commercial power interface 230.

In addition, the first master control circuit 130 may charge the first energy storage group 10 and/or the second energy storage group 20 by using the commercial power under the normal condition of the commercial power.

In some embodiments, the first master control circuit 130 may be further configured to supply power to the ac load in parallel by using the first energy storage group 110 and the second energy storage group 210, or supply power to the ac load by using the first energy storage group 110 or the second energy storage group 210 alone, according to the output control signal.

The output control signal includes, but is not limited to, an output control signal triggered by a user, for example, an output control signal triggered by a user through a key, touch, APP, or the like, or a signal generated by triggering under other preset conditions, for example, if the battery state is normal and the output interface is connected to the electric device, the output control signal may be output. Specifically, it is not particularly limited herein.

It should be understood that the third interface may also be connected to the second power supply 20, and is configured to transmit the electric energy accessed by the utility power interface 230 of the second power supply 20 when the utility power is normal, so as to charge the first energy storage group 110 and the second energy storage group 210 that are connected in parallel based on the electric energy accessed by the utility power interface 230.

In an embodiment, the first master control circuit 130 is configured to connect the first energy storage group 110 and the second energy storage group 210 in parallel when the mains is normal and the voltage difference between the first energy storage group 110 and the second energy storage group 210 is smaller than a preset difference value, so as to charge the first energy storage group 110 and the second energy storage group 210 connected in parallel through the mains interface 230. The first energy storage group 110 and the second energy storage group 210 which are connected in parallel are charged based on the electric energy accessed by the mains supply interface 230.

In addition, the first main control circuit 130 is configured to control the utility power interface 230 to charge the energy storage group with a smaller voltage value in the first energy storage group 110 and the second energy storage group 210 until the voltage difference between the first energy storage group 110 and the second energy storage group 210 is smaller than the preset difference value, when the utility power is normal and the voltage difference between the first energy storage group 110 and the second energy storage group 210 is greater than the preset difference value.

Specifically, the first master control circuit 130 may controllably charge the energy storage group with a smaller voltage value in the first energy storage group 110 and the second energy storage group 210 through the utility power interface 230 by controlling the switching circuit connected to the utility power interface 230.

Exemplarily, as shown in fig. 8, fig. 8 is a schematic block diagram of a first power supply provided in another embodiment of the present application. As shown in fig. 8, in the present embodiment, the first power supply 10 further includes a switching circuit 113, the fixed interface 114 of the switching circuit 113 is used for accessing the mains interface 230, and the switching circuit 113 is used for controllably switching the fixed interface 114 to connect the first energy storage group 110, so that the mains interface 230 is controllably powered with the first energy storage group 110. In addition, the fixed interface 114 of the switching circuit 113 may further be connected to the second energy storage group 210, so that the utility power interface 230 may controllably energize the second energy storage group 210.

Illustratively, the switching circuit 113 connects the fixed interface 114 to the first energy storage group and/or the second energy storage group based on a control signal of the first master control circuit.

For example, when the utility power interface is used for charging, the switching circuit 113 is configured to controllably switch the fixed interface 114 to connect the first energy storage group when the voltage value of the first energy storage group 110 is smaller than the voltage value of the second energy storage group 210 and the voltage difference between the first energy storage group 110 and the second energy storage group 210 is greater than a preset difference, so that the utility power interface 230 is controllably connected with the first energy storage group 110 to charge the first energy storage group 110 through the utility power interface 230. In addition, the switching circuit 113 may be further configured to controllably switch the fixed interface 114 to connect the second energy storage group when the voltage value of the second energy storage group 210 is smaller than the voltage value of the first energy storage group 110 and the voltage difference between the second energy storage group 210 and the first energy storage group 110 is greater than a preset difference, so that the utility power interface 230 is controllably powered on with the second energy storage group 210, and the second energy storage group 210 is charged through the utility power interface 230.

For example, when the first energy storage group 110 and the second energy storage group 210 are used to discharge a load connected to the mains interface, the switching circuit is configured to controllably switch the fixed interface to the larger voltage value of the first energy storage group 110 and the second energy storage group 210 when the voltage difference between the first energy storage group 110 and the second energy storage group 210 is greater than a preset difference value, so as to control the energy storage group with the larger voltage value to supply power to the outside until the voltage difference between the first energy storage group and the second energy storage group is smaller than the preset difference value. And when the voltage difference between the first energy storage group 110 and the second energy storage group 210 is smaller than the preset difference, allowing the first energy storage group 110 and the second energy storage group 210 to be connected in parallel to supply power or charge.

Illustratively, the first energy storage group 110 and the second energy storage group 210 are charged in parallel or externally powered in parallel, and include: the first switching device 240 between the first energy storage group 110 and the second energy storage group 210 is closed, and the switching circuit is connected with one of the first energy storage group 110 and the second energy storage group 210, so that the first energy storage group 110 and the second energy storage group 210 are charged in parallel or externally powered in parallel; or, the fixed interface 114 is connected to the first energy storage group 110 and the second energy storage group 210 by the switching circuit, that is, the commercial power interface is respectively in circuit conduction with the first energy storage group 110 and the second energy storage group 210, so that the first energy storage group 110 and the second energy storage group 210 are charged in parallel or externally powered in parallel.

For example, the switching circuit may include a single-pole double-throw switch, and the switching circuit may also include two switching units, where one switching unit controls on/off of a path between the utility power interface and the first energy storage group, and the other switching unit controls on/off of a path between the utility power interface and the second energy storage group, or the switching circuit may also include other circuit forms that implement the same function.

In other examples, the fixed interface of the switching circuit may also be connected to other input/output interfaces, and the switching circuit controls the power-on conditions of the first energy storage group 110 and the second energy storage group 210 with the other input/output interfaces, and the control logic may refer to the above example of the utility power interface.

Specifically, the fixed interface 114 of the switching circuit 113 may be connected to the mains interface 230 by connecting an inverter circuit and/or a rectifier circuit. Exemplarily, as shown in fig. 9, fig. 9 is a schematic block diagram of a first power supply provided in another embodiment of the present application. As can be seen from fig. 9, the first power supply 10 further includes an inverter circuit 118 and a rectifier circuit 112. The fixed interface 114 of the switching circuit 113 is connected to the commercial power interface 230 through the inverter circuit 118 and the rectifier circuit 112.

Specifically, in the present embodiment, the inverter circuit 118 is connected to the first energy storage group 110, and is configured to convert the direct current provided by the first energy storage group 110 and/or the second energy storage group 210 into an alternating current, so as to supply power to an alternating current load. Specifically, the inverter circuit 118 is connected to the AC output port 170 of the first power source 110, and is configured to convert the direct current provided by the first energy storage group 110 and/or the second energy storage group 210 into an alternating current, and supply power to an alternating current load through the AC output port 170. The AC output port 170 is connected to the first energy storage group 110 and/or the second energy storage group 210 through the inverter circuit 118, and is connected to the mains interface 230, so as to controllably provide the electric energy provided by the first energy storage group 110 and/or the second energy storage group 210 to the load through the mains interface.

The rectifying circuit 112 is configured to convert ac power received by the utility power interface 230 into dc power to charge the first energy storage group 110 and/or the second energy storage group 210. The rectifying circuit 112 is connected to an AC input port 180, and is connected to a commercial power interface 230 through the AC input port 180. Specifically, the first power supply 10 may controllably switch the fixed interface 114 of the switching circuit 113 to be connected to the first energy storage group 110 or the second energy storage group 210 through the switching circuit 113, so that the fixed interface 114 may access the electric energy of the mains interface 230 through the rectifying circuit 112, and the electric energy accessed by the mains interface 230 may controllably charge the first energy storage group 110 and/or the second energy storage group 210.

In addition, the inverter circuit 118 and the rectifying circuit 112 may be implemented by a bidirectional inverter circuit. Specifically, the operating principle of the bidirectional inverter circuit is similar to that of the inverter circuit and the rectifier circuit, and is not described herein again.

Exemplarily, as shown in fig. 10, fig. 10 is a schematic block diagram of a first power supply provided by another embodiment of the present application. As can be seen from fig. 10, in the present embodiment, the first power supply 10 further includes a second switching device 117. The second switching device 117 is disposed in a path of the first energy storage group 110 for supplying power to the outside. The first master control circuit 130 allows the first energy storage group 110 to supply power to the outside by controlling the state of the second switching device 117.

As shown in fig. 10, in particular, the second switching device 117 may be disposed between the AC output port 170 and the utility power interface 230, and controllably connect the AC output port 170 and the utility power interface 230, so as to connect the inverter circuit 118 to the AC output port 170 of the first power supply 110, for converting the direct current provided by the first energy storage group 110 and the second energy storage group 210 into an alternating current, and supplying power to an alternating current load through the AC output port 170.

Wherein the state of the second switching device 117 comprises on or off. It will be appreciated that when the second switching device 117 is on, the AC output port 170 is switched on with the mains interface 230; when the second switching device 117 is open, the AC outlet 170 is disconnected from the mains interface 230.

Specifically, the first main control circuit 130 is configured to, when a mains power fails, control the second switching device 117 to be turned on, so that the mains power interface 230 is connected to the AC output port 170, and provide an AC power to the outside through the first energy storage group 110 and/or the second energy storage group 210. Specifically, the first master control circuit 130 may be connected to the first energy storage group 110 through the control switching circuit 133, and by controlling the second switching device 117 to be turned on, the utility power interface 230 is connected to the AC output port 170, so as to provide AC power to the outside through the first energy storage group 110. Or, the first master control circuit 130 may be connected to the second energy storage group 210 through the control switching circuit 133, and by controlling the second switching device 117 to be turned on, the utility power interface 230 is connected to the AC output port 170, so as to provide AC power to the outside through the second energy storage group 210. In addition, when the control switching circuit is connected to the first energy storage group 110 or the second energy storage group 210, the first main control circuit 130 may control the first switching device 240 to be turned on, so that the first energy storage group 110 and the second energy storage group 210 are connected in parallel, and the first energy storage group 110 and the second energy storage group 210 provide the alternating current to the outside.

It should be understood that, the first main control circuit 130 is configured to disconnect the utility power interface 230 from the AC output port 170 by controlling the port of the second switching device 117 when the utility power is normal, so as to supply power to the outside through the utility power interface 230.

In addition, as shown in fig. 11, fig. 11 is a schematic block diagram of a first power supply provided in another embodiment of the present application. As can be seen from fig. 11, the second switching device 117 is further disposed on the charging path of the first energy storage group 110, and the first main control circuit 130 is further configured to control the first energy storage group 110 to access charging by controlling the state of the second switching device 117.

In particular, the second switching device 117 is also arranged between the AC input port 180 and the mains interface 230. When the second switching device 117 is turned on, the AC input port 180 may transmit the AC power received by the utility power interface 230 to the rectifying circuit 112, and the rectifying circuit 112 converts the corresponding AC power into a dc power to charge the first energy storage set 110 and/or the second energy storage set 210.

Illustratively, the first main control circuit 130 is configured to, if the utility power is normal, control the second switching device 117 to be turned on, so that the utility power interface 230 is connected to the AC input port 180, so that the AC power received by the utility power interface 230 is transmitted to the rectifying circuit 112, and the rectifying circuit 112 converts the corresponding AC power into a dc power to charge the first energy storage group 110 and/or the second energy storage group 210.

It should be noted that, in fig. 11, a structure that the switching circuit 113 is connected to the second energy storage group 210 is not shown, and in practical applications, as shown in fig. 10, the switching circuit 113 is further connected to the second energy storage group 210 to charge the first energy storage group 110 and/or the second energy storage group 210 through the ac power accessed through the utility power interface 230. The first power supply is provided with an interface for connecting the switching circuit and the second energy storage group, illustratively, the first power supply comprises a ninth interface, the switching circuit 113 is connected with the ninth interface, the second power supply comprises a tenth interface, the tenth interface is connected with the second energy storage group, and when the first power supply is connected with the second power supply, the ninth interface is connected with the tenth interface, so that the switching circuit of the first power supply is connected with the second energy storage group.

In addition, as shown in fig. 11, in the embodiment of the present application, the first energy storage group 110 may also be charged by an external solar energy or a charger through the charging circuit 150.

In an embodiment, the first master control circuit 130 may further determine whether the mains is faulty or not through the mains status signal of the AC output port 180.

Specifically, the first power supply 10 includes an inverter circuit 118 and a rectifier circuit 112. The inverter circuit 118 converts the direct current provided by the first energy storage group 110 and/or the second energy storage group 210 into alternating current, so as to supply power to an alternating current load; the electric energy provided by the utility power interface 230 is converted into direct current through the rectifying circuit 112, so as to charge the first energy storage group 110 and/or the second energy storage group 210.

It should be understood that in some alternative implementations of the present application, the first power source 10 may further include a bidirectional inverter circuit (not shown in the figures). The first main control circuit 130 may be further configured to connect the utility power interface 230 to the bidirectional inverter circuit through the second switch device 117 if the utility power is normal; if the utility power fails, the utility power interface 230 is connected to the bidirectional inverter circuit through the second switching device 117; the bidirectional inverter circuit is connected with both the AC output port 170 and the AC input port 180, can be connected with the first energy storage group 110 through the bidirectional inverter circuit, and is used for charging the first energy storage group 110 through the AC output port 170; can be used to provide AC power to the load through the AC input port 180. The second switching device 117 may include an AC switch or other form of switching unit.

In addition, the first master control circuit 130 may also control the first energy storage group 110 and the second energy storage group 210 to charge each other. For example, the first master control circuit 130 may control the dc conversion circuit to realize mutual charging between the first energy storage group 110 and the second energy storage group 210. Specifically, (weight 11) in the case that the voltage difference between the first energy storage group 110 and the second energy storage group 210 is greater than the preset difference, the first master control circuit 130 may control the energy storage group with the larger voltage value in the first energy storage group 110 and the second energy storage group 210 to charge the energy storage group with the smaller voltage value until the voltage difference between the first energy storage group 110 and the second energy storage group 210 is smaller than the preset difference. The preset difference may be a constant preset according to actual requirements, for example, 0.3.

For example, if the voltage difference between the first energy storage group 110 and the second energy storage group 210 is greater than the predetermined difference, and the voltage value of the first energy storage group 110 is less than the voltage value of the second energy storage group 210, the first energy storage group 110 may be charged through the second energy storage group 210.

For another example, the first main control circuit 130 may further control the first energy storage group 110 to charge the second energy storage group 210 when the utility power is normal, if the voltage value of the first energy storage group 110 is greater than the voltage value of the second energy storage group 210, and the voltage difference between the first energy storage group 110 and the second energy storage group 210 is greater than the preset difference, until the voltage difference between the first energy storage group 110 and the second energy storage group 210 is smaller than the preset difference.

Specifically, as shown in fig. 12, fig. 12 is a schematic block diagram of a first power supply provided by yet another embodiment of the present application. As can be seen from fig. 12, in the present embodiment, the first power supply 10 further includes a fifth interface 141. The fifth interface 141 is connected to the first energy storage group 110 and the second power supply 20, and the electric energy provided by the first energy storage group 110 can be transmitted to the second power supply 20 through the fifth interface 141, so as to charge the second energy storage group 210.

Specifically, the fifth interface 141 may transmit the power provided by the first energy storage group 110 to the second energy storage group 210 of the second power supply 20 through a dc conversion circuit connection with the second power supply 20. The second power supply 20 may include a dc conversion circuit connected to the second energy storage group 210. It should be noted that, in this embodiment, the fifth interface 141 is an interface independent from the first interface 120, and in some other optional implementations of the present application, the fifth interface 141 may also be integrated in the first interface 120.

Exemplarily, as shown in fig. 13, fig. 13 is a schematic block diagram of a second power supply provided in a further embodiment of the present application. As shown in fig. 13, in this embodiment, the second power supply 20 further includes a first dc conversion circuit 280, and the first dc conversion circuit 280 is connected to the fifth interface 141 of the first power supply 10 and the second energy storage group 210, and can convert the electric energy provided by the first energy storage group 110 through the fifth interface 141 and then charge the second energy storage group 210.

Illustratively, the first master circuit 130 of the first power supply 10 may transmit the second communication signal to the second communication port 250 of the second power supply 20 through the first communication port 160. The second communication port 250 is connected to the second master control circuit 260. The first dc conversion circuit 280 may be connected to the fifth interface 141 through a seventh interface. Wherein the seventh interface is not shown in the figure.

For example, the second power supply 20 may receive a second communication signal through the second master control circuit 260, and the second master control circuit 260 controls the first dc converting circuit 280 to operate according to the received second communication signal, so that the first energy storage group 110 can charge the second energy storage group 210. Wherein, the second communication signal can be transmitted to the second master control circuit 260 through the second communication port 250.

In some optional implementations, the first power supply 10 may transmit the power provided by the first energy storage group 110 to the first dc converter circuit 280 through the fifth interface 141, and meanwhile, the second master control circuit 260 of the second power supply 20 receives the second communication signal transmitted by the first master control circuit 130 of the first power supply 10 through the second communication interface 250, and controls the first dc converter circuit 280 to convert the power transmitted by the first energy storage group 110 according to the second communication signal, and then charges the second energy storage group 210. The first DC conversion circuit 280 may include a DC-DC voltage reduction circuit, and specifically, the DC-DC voltage reduction circuit performs voltage conversion on the electric energy transmitted by the first energy storage group 110 and outputs the electric energy to the second energy storage group 210, so as to charge the second energy storage group 210 with the first energy storage group 110. In other optional implementations, the first dc conversion circuit 280 may further implement a constant current output.

In addition, as shown in fig. 14, fig. 14 is a schematic block diagram of a first power supply provided in another embodiment of the present application. As can be seen in fig. 14, the first power supply 10 may further include a sixth interface 142. The sixth interface 142 is connected to the first energy storage group 110 and the second power supply 20, and the electric energy provided by the second energy storage group 210 can be transmitted to the first energy storage group 110 through the sixth interface 142, so as to charge the first energy storage group 110. It should be noted that, in this embodiment, as can be seen from fig. 14, the sixth interface 142 and the fifth interface 141 are both integrated in the first interface 120, but in some other embodiments of the present application, the sixth interface 142 and the fifth interface 141 may also be interfaces independent from the first interface 120.

Illustratively, the sixth interface 142 is connected to the first energy storage group 110 and the second dc conversion circuit 212 of the second power supply 20, and after the electric energy provided by the second energy storage group 210 is converted by the second dc conversion circuit 212, the electric energy is transmitted to the first energy storage group 110 through the sixth interface 142, so that the electric energy provided by the second energy storage group 210 is used to charge the first energy storage group 110.

Exemplarily, as shown in fig. 15, in the present embodiment, the second power supply 20 further includes a second dc conversion circuit 212. The second dc conversion circuit 212 is connected to the second energy storage group 210, and is configured to convert the electric energy provided by the second energy storage group 210 and output the converted electric energy to the first power supply 10, so that the second energy storage group 210 can charge the first energy storage group 110. The second dc conversion circuit 212 may be connected to the sixth interface 142 through an eighth interface, and specifically, the eighth interface is not shown in fig. 15.

For example, the first power supply 10 may transmit the electric energy provided by the first energy storage group 110 to the second dc conversion circuit 212 through the sixth interface 142, and the second power supply 20 receives a third communication signal transmitted by the first power supply 10 through the first main control circuit 130, and controls the second dc conversion circuit 212 to operate according to the third communication signal, so that the second energy storage group 210 can charge the first energy storage group 110. (right 42) for example, the second power supply 20 may receive a third communication signal transmitted by the first power supply 20 through the second communication port 250, and the second master control circuit 260 controls the second dc conversion circuit 212 to operate according to the third communication signal, so that the second energy storage group 210 can charge the first energy storage group 110.

The second communication port 250 is connected to the first communication port 160 and the second main control circuit 260 of the first power supply 10, and the second main control circuit 260 converts the electric energy transmitted by the second energy storage group 210 according to a third communication signal transmitted by the second communication port 250 and outputs the converted electric energy to the first energy storage group 110 for charging. The second DC conversion circuit 212 may also be a DC-DC voltage reduction circuit, and specifically, the electric energy transmitted by the second energy storage group 210 is subjected to voltage conversion by the DC-DC voltage reduction circuit and is output to the first energy storage group 110, so that the second energy storage group 210 charges the first energy storage group 110. In other alternative implementations, the second dc conversion circuit 210 may also implement a constant current output.

In addition, in some embodiments, the first main control circuit 130 is further configured to charge the first energy storage group 110 through the utility power interface 230 until the voltage difference between the first energy storage group 110 and the second energy storage group 210 is smaller than a preset difference value under the condition that the utility power is normal, the voltage value of the first energy storage group 110 is smaller than the voltage value of the second energy storage group 210, and the voltage difference between the first energy storage group 110 and the second energy storage group 210 is larger than the preset difference value.

For example, the detailed description of the previous embodiments can be referred to for the process of charging the first energy storage group 110 through the utility power interface 230, and the detailed description is omitted here.

The fifth interface 141 and the first interface 120 may be integrated into the same interface, and the seventh interface and the second interface 220 may also be integrated into the same interface. The sixth interface 142 may be integrated in the same interface as the first interface 120 and/or the fifth interface 141, and the eighth interface may be integrated in the same interface as the second interface 220 and/or the seventh interface.

In addition, the first dc conversion circuit 280 may be in an off state when not required to operate, so as to reduce power consumption. The second master control circuit 260 may control the first dc conversion circuit 280 to be turned off or turned on, or the first master control circuit 130 controls the first dc conversion circuit 280 to be turned off or turned on through a communication signal. For example, when the first power supply 10 and the second power supply 20 are detached to be in the separated state, the first main control circuit 130 of the first power supply 10 and/or the second main control circuit 260 of the second power supply 20 may detect disconnection, and correspondingly, the second main control circuit 260 controls the first dc conversion circuit 280 to stop operating, or the first main control circuit 230 may send a control signal, so that the second main control circuit 260 controls the first dc conversion circuit 280 to stop operating according to the received control signal. For another example, the first energy storage group 110 does not need to charge the second energy storage group 210, and the first main control circuit 130 sends a communication signal to the second power supply 20 to control the first dc conversion circuit 280 to stop operating. The above is merely an example, and the control strategy for turning on and off the first dc circuit 280 may be adjusted according to actual needs.

It should be understood that the first dc conversion circuit 280 may also be disposed in the first power supply 10, and when the first dc conversion circuit 280 is disposed in the first power supply 10, the corresponding operation principle is the same as that disposed in the second power supply 20, and will not be described herein again. In the embodiment of the present application, the first dc conversion circuit 280 is disposed in the second power supply 20 to improve portability and portability of the first power supply 10 used alone outdoors.

According to the analysis, the energy storage device provided by the embodiment of the application can be detachably connected with the second power supply through the first power supply, so that the first power supply and the second power supply can be independently powered respectively, and when the first interface is connected with the second interface of the second power supply, the first energy storage group and the second energy storage group can be externally powered in parallel, so that the flexibility of power supply of the energy storage device and the adaptability to an application scene are improved.

Referring to fig. 16, as shown in fig. 16, fig. 16 is a schematic diagram illustrating an interface connection between a first power supply and a second power supply according to an embodiment of the present application.

In fig. 16, the first interface, the sixth interface, the fifth interface, and the first communication port are integrated into one interface. The second interface, the seventh interface, the eighth interface and the second communication interface are all integrated in one interface. To simplify the connection of the first power supply and the second power supply.

As can be seen from fig. 16, in the present embodiment, the first power supply 10 includes a first interface 120, and the second power supply 20 includes a second interface 220. Wherein the first interface 120 has integrated therein a first communication port 160, a first positive terminal 115 and a first negative terminal 116; integrated within the second interface 220 are a second communication port 250, a second positive terminal 213 and a second negative terminal 214. When the first power supply 10 and the second power supply 20 are connected, the first communication port 160 and the second communication port 250 are connected, the first positive terminal 115 and the second positive terminal 214 are connected, and the first negative terminal 116 and the second negative terminal 214 are connected.

The first communication port 160 is connected to the first main control circuit 130, the first positive terminal 115 is connected to the positive electrode of the first energy storage group 110, and the first negative terminal 116 is connected to the negative electrode of the first energy storage group 110.

The second communication port 250 is connected to the second main control circuit 260, and is connected to the first dc conversion circuit 280, the second dc conversion circuit 212 and the first switching device 240 through the second main control circuit 260, the second positive terminal 213 is connected to the positive electrode of the first dc conversion circuit 280, the positive electrode of the second dc conversion circuit 212 and the positive electrode of the second energy storage set 210, respectively, and the second negative terminal 214 is connected to the negative electrode of the first dc conversion circuit 280, the negative electrode of the second dc conversion circuit 212 and the negative electrode of the second energy storage set 210, respectively.

When the first power supply 10 and the second power supply 20 are connected, the first interface 120 and the second interface 220 are connected, so that the first communication port 160 and the second communication port 250 are connected, and the first dc conversion circuit 280 and the second dc conversion circuit 212 are connected to the first energy storage group 110 and the second energy storage group 210, respectively. The first energy storage group 110 and the second energy storage group 210 are charged by controlling the conduction of the first dc conversion circuit 280 and the second dc conversion circuit 212. The first switching device 240 is turned on to connect the first energy storage group 110 and the second energy storage group 210 in parallel, and then the first energy storage group 110 and the second energy storage group 210 are controlled to supply power to the outside according to power supply requirements.

It should be understood that the second dc conversion circuit 212 may also be disposed in the first power supply 10, and in the embodiment of the present application, the second dc conversion circuit 212 is disposed in the second power supply 20 to improve the portability and portability of the first power supply 10 used alone outdoors.

In addition, the second dc conversion circuit 212 may be in an off state when not required to operate, so as to reduce power consumption. The second master control circuit 260 may control the second dc conversion circuit 212 to be turned off or on, or the first master control circuit 130 may control the second dc conversion circuit 212 to be turned off or on through the communication signal. For example, after the first power supply 10 and the second power supply 20 are detached to be in the separated state, when a user needs to carry the first power supply 10 for outdoor use, the first main control circuit 130 of the first power supply 10 and the second main control circuit 260 of the second power supply 20 may detect that the communication signal is disconnected, and correspondingly, the second main control circuit 260 controls the second dc conversion circuit 212 to stop working, or the first main control circuit 130 may send a control signal, so that the second main control circuit 260 controls the second dc conversion circuit 212 to stop working according to the received control signal. For another example, the second energy storage group 210 does not need to charge the first energy storage group 110, and the first master control circuit 130 sends a communication signal to the second power supply 20 to control the second dc conversion circuit 212 to stop operating. The above is merely an example, and the control strategy for turning on and off the second dc converter circuit 212 may be adjusted according to actual requirements. Referring to fig. 17, fig. 17 is a schematic diagram illustrating an interface connection between a first power supply and a second power supply according to another embodiment of the present disclosure, as shown in fig. 17, the first power supply 10 may further include a switching circuit 113, when the first power supply 10 is connected to the second power supply 20, the switching circuit 113 is connected to the second energy storage group 210, the first energy storage group 110 is connected to the second energy storage group 210 in parallel through the first switching device 280, and the switching circuit 113 controls the first energy storage group 110 and/or the second energy storage group 210 to be connected to the mains supply interface 230. The principle of operation of the other structure in fig. 17 can be explained with reference to fig. 16. The circuit configurations of fig. 16 and 17 may also be combined, and for example, the power supply system formed by the first power supply 10 and the second power supply 20 may include a first dc conversion circuit, a second dc conversion circuit, and a switching circuit.

In an embodiment, the first master control circuit 130 is configured to control the first energy storage group 110 to charge the second energy storage group 210 when the voltage of the first energy storage group 110 is greater than a predetermined voltage value and the voltage of the first energy storage group 110 is greater than the voltage of the second energy storage group 210 by a predetermined difference.

In an embodiment, the first main control circuit 130 is configured to stop the first energy storage group 110 from charging the second energy storage group 210 when a voltage difference between the first energy storage group 110 and the second energy storage group 210 when the first energy storage group 110 charges the second energy storage group 210 is smaller than a preset difference, and control the utility power interface 230 to charge the first energy storage group 110 until an electric quantity of the first energy storage group 110 is larger than a preset electric quantity. The preset electric quantity can be full electric quantity, 90% electric quantity or 95% electric quantity and the like.

Because the first energy storage group 110 consumes its own electric quantity in the process of charging the second energy storage group 210, the first energy storage group 110 can be charged correspondingly through controlling the commercial power interface 240, so that the recovery of the electric quantity of the first energy storage group 110 can be effectively guaranteed. In an embodiment, the first main control circuit 130 is configured to control the utility power interface 240 to charge the energy storage group with a lower voltage value in the first energy storage group 110 and the second energy storage group 210 when a voltage difference between the first energy storage group 110 and the second energy storage group 210 exceeds a preset range.

In an embodiment, the first main control circuit 230 is configured to connect the first energy storage group 110 and the second energy storage group 210 in parallel when a voltage difference between the first energy storage group 110 and the second energy storage group 210 is within a preset range, and charge the first energy storage group 110 and the second energy storage group 210 connected in parallel through the mains interface 240.

It should be understood that, in each of the above embodiments, an exemplary description is given to a process of controlling the commercial power interface 240 in the second power supply 20 by the first main control circuit 130 to charge the first energy storage group 110 and/or the second energy storage group 210, and in practical applications, the first main control circuit 130 may also control the charging interface circuit 111 in the first power supply 10 or the charging interface circuit 111 in the second power supply 20 to charge the first energy storage group 110 and/or the second energy storage group 210, and a specific control principle thereof is the same as the principle of controlling the commercial power interface 240 in the second power supply 20 to charge, and is not repeated herein.

Furthermore, in some embodiments of the present application, the first power supply may further include an external power supply interface (not shown in the figure), and the external power supply interface may include at least one of a DC output interface, a vehicle emergency start output interface, a cigarette lighter interface, a type-c interface, or a USB interface for providing corresponding power to the load. The vehicle emergency starting output interface can be connected with a vehicle through a battery clamp to realize an emergency starting function. The DC output interface is differentiated by voltage, and may include one or more of a 5V output interface, a 12V output interface, a 16V output interface, a 19V output interface, or a 24V output interface, which are listed here as examples only, and those skilled in the art may expand according to actual needs.

It should also be understood that "connected" in embodiments of the present application may include directly connected or indirectly connected. Illustratively, the external power supply interface is connected to the first energy storage group, the connection includes direct connection or indirect connection through one or more circuit modules such as a switch circuit, a conversion circuit, an inverter or a protection circuit, and the first energy storage group can supply power to an external load through the external power supply interface.

It should be understood that the second power supply provided in the embodiment of the present application may also include at least one of a DC output interface, a cigarette lighter interface, a type-c interface, or a USB interface, and is not limited in the embodiment of the present application.

According to the analysis, the energy storage device provided by the embodiment of the application can be detachably connected with the second power through the first power, so that the first power and the second power can be independently supplied, and when the first interface is connected with the second interface of the second power, the first energy storage group and the second energy storage group can be connected in parallel to supply power externally, the power supply flexibility of the power is improved, and the adaptability of the energy storage device to an application scene is improved.

The application also provides an energy storage power supply control method, which is used for controlling the first energy storage group and the second energy storage group to be connected in parallel when the first power supply is connected with the second power supply so as to realize the external power supply by utilizing the first energy storage group and the second energy storage group which are connected in parallel. The first power supply is convenient for a user to carry to the outdoor power supply, and the second power supply is arranged in the indoor power supply. Through set up commercial power interface in the second power, realize that the second power conveniently charges and be used for giving indoor power supply.

Referring to fig. 18, fig. 18 is a schematic flow chart illustrating an implementation of the energy storage power control method according to an embodiment of the present application.

It should be noted that the energy storage power control method may be specifically applied to the main control circuit of the first power supply provided in the foregoing embodiment, and the energy storage device control method will be described below with reference to the first power supply, and it should be understood that the energy storage power control method is not limited to the first power supply provided in the foregoing embodiment. For example, the energy storage power supply control method may also be implemented by a main control circuit of the second power supply or other control devices, which is not limited herein.

As shown in fig. 18, in the present embodiment, the method for controlling the stored energy power includes steps S1110 to S1112. The details are as follows:

s1110, when it is detected that the first interface of the first power source is connected to the second interface of the second power source, connecting the first energy storage group and the second energy storage group in parallel.

When a user needs to use a large-capacity battery for power supply, the first power supply and the second power supply are connected, and particularly when a first interface of the first power supply is connected with a second interface of the second power supply, the first energy storage group and the second energy storage group are connected in parallel.

In an embodiment, before connecting the first energy storage group and the second energy storage group in parallel, the method further includes: and controlling the voltage difference between the first energy storage group and the second energy storage group within a preset range. So, can avoid appearing two energy storage group's pressure differential too big when organizing parallelly connected because of first energy storage group and second energy storage, produce the condition that heavy current and damage the product, for example the heavy current can burn out circuit component and circuit, for example the temperature that the heavy current probably made energy storage component rises fast again to damage energy storage component. Therefore, the pressure difference of the two energy storage groups is controlled within a preset range and then connected in parallel, so that the safety of power utilization can be improved, and the service life of a product is prolonged.

In an optional implementation manner of the present application, in order to enable a voltage difference between the first energy storage group and the second energy storage group to be within a preset range, charging of the first energy storage group or the second energy storage group may be controlled. The charging interface circuit can be arranged on the first power supply or the second power supply, and the first energy storage group or the second energy storage group is charged in a mode that the charging interface circuit is connected with an external power supply.

Illustratively, a mains interface is provided within the second power supply. And charging the first energy storage group or the second energy storage group through the mains supply interface until the voltage difference between the first energy storage group and the second energy storage group is within a preset range.

In an embodiment, when the utility power is detected to be normal, the first energy storage group and/or the second energy storage group are/is charged through the utility power interface.

When the mains supply is detected to be normal and the voltage difference between the first energy storage group and the second energy storage group is larger than the preset difference value, the mains supply interface is controlled to charge the energy storage group with the smaller voltage value in the first energy storage group and the second energy storage group until the voltage difference between the first energy storage group and the second energy storage group is smaller than the preset difference value.

When the mains supply is detected to be normal and the voltage difference between the first energy storage group and the second energy storage group is smaller than the preset difference value, the first energy storage group and the second energy storage group are connected in parallel, so that the first energy storage group and the second energy storage group which are connected in parallel are charged through the mains supply interface.

In another optional implementation manner of the present application, in a case that a voltage difference between the first energy storage group and the second energy storage group is greater than a preset difference, the energy storage group with a larger voltage value in the first energy storage group and the second energy storage group is controlled to charge the energy storage group with a smaller voltage value until the voltage difference between the first energy storage group and the second energy storage group is smaller than the preset difference.

In one embodiment, the second power supply controls a first direct current conversion circuit of the second power supply to work according to the second communication signal by transmitting the second communication signal to the second power supply, so that the first energy storage group charges the second energy storage group; and/or transmitting a third communication signal to the second power supply to enable the second power supply to control a second direct current conversion circuit of the second power supply to work according to the third communication signal, so that the second energy storage group charges the first energy storage group.

In other optional implementation manners, the first energy storage group may be charged to a state that the voltage of the first energy storage group is greater than a preset voltage through the charging interface circuit, if the voltage of the first energy storage group is greater than the voltage of the second energy storage group and exceeds a preset difference, the second energy storage group is charged through the first energy storage group until the voltage of the first energy storage group is greater than the voltage of the second energy storage group and does not exceed the preset difference, the charging circuit is repeated to charge the first energy storage group, then the step of charging the second energy storage group through the first energy storage group is performed until the first energy storage group and the second energy storage group are both charged to a full state, and at this time, the first energy storage group and the second energy storage group are connected in parallel.

In other alternative implementations, any charging method that enables the first energy storage group and the second energy storage group to be connected in parallel after voltage equalization is performed is within the scope of the present application.

It should be noted that, in the embodiment of the present application, the principle of determining to charge the first energy storage group or the second energy storage group by controlling the charging interface circuit or the mains interface may refer to the description about the first power supply and the second power supply in the embodiments of fig. 1 to 16. And will not be described in detail herein.

It should be noted that, a person skilled in the art may convert the voltage value of the first energy storage group and the voltage value of the second energy storage group into other electrical parameter values for representing, such as current or electric quantity, and the like, and the essence is also within the protection scope of the above embodiments. For example, the voltage value of the first energy storage set is greater than the predetermined voltage value, and can be converted into an electric quantity value of the first energy storage set greater than the predetermined electric quantity.

And S1112, utilizing the first energy storage group and the second energy storage group which are connected in parallel to supply power to the outside.

When the first interface is connected with the second interface, the second power supply is connected with the first power supply.

For example, the first energy storage group and the second energy storage group which are connected in parallel can provide direct current through a DC output interface, can also provide alternating current through an alternating current output interface, and can also provide electric energy through a vehicle emergency starting output interface, a type-c interface, a cigarette lighter interface or a USB interface.

In addition, the charging interface circuit or the commercial power interface can be controlled to supply power to the alternating current load. Specifically, after the first energy storage group and the second energy storage group are connected in parallel, if a power supply fault of the commercial power to the alternating current load is detected, the first energy storage group and the second energy storage group which are connected in parallel are controlled to supply power to the alternating current load through a commercial power interface of the second power supply. Of course, the charging interface circuit can be controlled to enable the first energy storage group and the second energy storage group which are connected in parallel to supply power to the alternating current load through the AC output port of the first power supply.

For example, when the alternating current load is powered by the mains supply in a failure, the first energy storage group and the second energy storage group are used for supplying power to the alternating current load in parallel, or the first energy storage group or the second energy storage group is used for supplying power to the alternating current load separately.

In an embodiment, in the case that the output control signal is detected, the utility power interface is controlled to supply power to the ac load by using the first energy storage group and the second energy storage group in parallel, or by using the first energy storage group or the second energy storage group alone.

In an embodiment, when the voltage difference between the first energy storage group and the second energy storage group is smaller than the preset difference, the first energy storage group and the second energy storage group are connected in parallel, so that the first energy storage group and the second energy storage group which are connected in parallel are used for supplying power to the outside.

In an embodiment, under the condition that the voltage difference between the first energy storage group and the second energy storage group is greater than the preset difference, the energy storage group with the larger voltage value in the first energy storage group and the second energy storage group is controlled to supply power to the outside until the voltage difference between the first energy storage group and the second energy storage group is smaller than the preset difference.

It should be noted that, in the embodiments of the present application, the principle of determining to supply power to the external ac load by using the first energy storage set and/or the second energy storage set by controlling the charging interface circuit or the mains interface may refer to the description of the first power supply and the second power supply in the embodiments of fig. 1 to 16. And will not be described in detail herein.

It should be understood that the implementation process of the first power supply and the second power supply in this embodiment is the same as the implementation process of the first power supply and the second power supply in the embodiment of fig. 1 to 16, and reference may be made to the description of the foregoing embodiments, and details are not repeated here.

The energy storage power supply control method provided by the embodiment comprises the following steps: when detecting that a first interface of the first power supply is connected with a second interface of the second power supply, connecting the first energy storage group and the second energy storage group in parallel; the first energy storage group and the second energy storage group which are connected in parallel are used for supplying power to the outside; wherein the second power source is connected to the first power source when the first interface is connected to the second interface. According to the energy storage power supply control method provided by the embodiment, when the connection between the first interface of the first power supply and the second interface of the second power supply is detected, the first energy storage group and the second energy storage group are connected in parallel, and the first energy storage group and the second energy storage group which are connected in parallel are used for supplying power to the outside. So that first power can be connected with the second power and supply power outward, improve the adaptability of energy storage equipment to using the scene.

It should be understood that each function implemented by the first main control circuit may be executed by one processing module, or may be implemented by a plurality of processing modules that exist physically, and the processing module may be implemented in a form of hardware, or may be implemented in a form of a software functional module. The first main control circuit may include one or more of a Micro Controller Unit (MCU), a general-purpose microprocessor or other programmable logic device, a hardware component, and the like, and all of them as long as they can implement the control function belong to the protection scope of the embodiments of the present application.

Each function realized by the second main control circuit may be executed by one processing module, or may be realized by a plurality of physically existing processing modules together, and the processing module may be realized in a hardware form, or may be realized in a software functional module form. The first main control circuit may include one or more of a Micro Controller Unit (MCU), a general-purpose microprocessor or other programmable logic device, a hardware component, and the like, as long as the control function can be realized, which all belong to the protection scope of the embodiment of the present application.

It is also to be understood that the terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the specification of the present application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should also be understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of other like elements in a process, method, article, or system comprising the element. The above-mentioned serial numbers of the embodiments of the present application are merely for description and do not represent the merits of the embodiments.

While the invention has been described with reference to specific embodiments, the scope of the invention is not limited thereto, and those skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the invention. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A first power source, wherein the first power source is removably connectable to a second power source, the first power source comprising:

a first energy storage bank;

2. The first power supply according to claim 1, wherein the first main control circuit is configured to, when a power failure occurs in the ac load due to the commercial power, utilize the first energy storage group and the second energy storage group to supply power to the ac load in parallel, or utilize the first energy storage group or the second energy storage group to supply power to the ac load alone.

3. The first power supply of claim 1, wherein the first master control circuit is configured to utilize the first energy storage group and the second energy storage group to supply power to an ac load in parallel or to utilize the first energy storage group or the second energy storage group to supply power to the ac load individually according to the output control signal.

4. The first power supply of claim 1, wherein the first master control circuit is further configured to charge the first energy storage bank and/or the second energy storage bank through a mains interface under a normal mains condition.

5. The first power supply according to claim 1, wherein the first main control circuit is further configured to connect the first energy storage group and the second energy storage group in parallel to supply power to the outside by using the first energy storage group and the second energy storage group connected in parallel when a voltage difference between the first energy storage group and the second energy storage group is smaller than a preset difference.

6. The first power supply of claim 1, wherein the first main control circuit is further configured to connect the first energy storage bank and the second energy storage bank in parallel to charge the first energy storage bank and the second energy storage bank connected in parallel through a mains interface when a mains supply is normal and a voltage difference between the first energy storage bank and the second energy storage bank is smaller than a preset difference.

7. The first power supply according to claim 1 or 4, wherein the first main control circuit controls the energy storage group with a larger voltage value in the first energy storage group and the second energy storage group to supply power to the outside when the voltage difference between the first energy storage group and the second energy storage group is greater than a preset difference value, until the voltage difference between the first energy storage group and the second energy storage group is smaller than the preset difference value.

8. The first power supply of claim 1 or 6, wherein the first master control circuit is further configured to control the mains interface to charge the energy storage group with a smaller voltage value in the first energy storage group and the second energy storage group until the voltage difference between the first energy storage group and the second energy storage group is smaller than a preset difference value when the mains is normal and the voltage difference between the first energy storage group and the second energy storage group is larger than the preset difference value.

9. The first power supply of claim 1, further comprising: the switching circuit is used for controllably switching the fixed interface to be connected with the first energy storage group or the second energy storage group so that the mains supply interface is controllably electrified with the first energy storage group or the second energy storage group.

10. The first power supply according to claim 9, further comprising an inverter circuit and/or a rectifier circuit, wherein the fixed interface of the switching circuit is connected to the commercial power interface by connecting the inverter circuit and/or the rectifier circuit.

11. The first power supply according to claim 1 or 5, wherein the first main control circuit is further configured to control the energy storage group with a larger voltage value to charge the energy storage group with a smaller voltage value in the first energy storage group and the second energy storage group until the voltage difference between the first energy storage group and the second energy storage group is smaller than a preset difference value, when the voltage difference between the first energy storage group and the second energy storage group is larger than the preset difference value.

12. The first power supply of claim 1 or 6, wherein the first main control circuit is further configured to charge the first energy storage group through a mains interface until a voltage difference between the first energy storage group and the second energy storage group is smaller than a preset difference value under the condition that a mains supply is normal, a voltage value of the first energy storage group is smaller than a voltage value of the second energy storage group, and a voltage difference between the first energy storage group and the second energy storage group is larger than the preset difference value.

13. The first power supply of claim 1 or 6, wherein the first main control circuit is further configured to control the first energy storage group to charge the second energy storage group until a voltage difference between the first energy storage group and the second energy storage group is smaller than a preset difference value under the condition that the mains supply is normal, the voltage value of the first energy storage group is greater than the voltage value of the second energy storage group, and the voltage difference between the first energy storage group and the second energy storage group is greater than the preset difference value.

14. The first power supply of claim 1, wherein the first master control circuit is further configured to transmit a second communication signal to the second power supply, so that the second power supply controls a first dc conversion circuit of the second power supply to operate according to the second communication signal, and the first energy storage group charges the second energy storage group;

and/or the presence of a gas in the gas,

the first master control circuit is further configured to transmit a third communication signal to the second power supply, so that the second power supply controls a second direct-current conversion circuit of the second power supply to operate according to the third communication signal, and the second energy storage group charges the first energy storage group.

15. The first power supply of claim 1, further comprising:

the first energy storage group is connected with the fifth interface, and the fifth interface is used for being connected with the second power supply so that the first energy storage group charges the second energy storage group through the fifth interface;

and/or the presence of a gas in the gas,

and the first energy storage group is connected with the sixth interface, and the sixth interface is used for connecting the second power supply so that the first energy storage group is charged by the second energy storage group through the sixth interface.

16. The first power supply according to claim 1 or 2, further comprising a third interface, where the third interface is connected to the first energy storage bank, and is configured to transmit the electric energy provided by the first energy storage bank and the second energy storage bank after being connected in parallel to the second power supply, so as to supply power to an ac load through a mains interface of the second power supply.

17. The first power supply according to claim 10, wherein the inverter circuit is connected to the first energy storage group and configured to convert the dc power provided by the first energy storage group and/or the second energy storage group into ac power for supplying power to an ac load.

18. The first power supply of claim 1, further comprising a third interface, wherein the third interface is configured to connect to the second power supply to access electric energy accessed by a mains interface of the second power supply to charge the first energy storage set and/or the second energy storage set.

19. The first power supply according to claim 10, wherein the rectifying circuit is configured to convert ac power received from a mains interface into dc power for charging the first energy storage bank and/or the second energy storage bank.

20. The first power supply of claim 1, further comprising a first communication port for communicating with the second power supply;

the first master control circuit transmits a first communication signal to the second power supply through the first communication port to control a first switch device in the second power supply to be switched on, so that the first energy storage group and the second energy storage group are connected in parallel.

21. The first power supply according to claim 10, further comprising a second switching device disposed in a path of the first energy storage set supplying power to the outside;

the first main control circuit controls the state of the second switch device to allow the first energy storage group to supply power to the outside.

22. The first power supply of claim 21, wherein the second switching device is further disposed in a charging path of the first energy storage bank, and the first master control circuit is further configured to control the first energy storage bank to access charging by controlling a state of the second switching device.

23. The first power supply of claim 1, further comprising a second switching device, a bi-directional inverter circuit, an AC input port, and an AC output port;

the first main control circuit is used for enabling a mains supply interface to be connected to the AC input port through the second switching device if the mains supply is normal; if the mains supply fails, the mains supply interface is connected to the AC output port through the second switching device;

the AC input port is connected with the first energy storage group through the bidirectional inverter circuit and is used for charging the first energy storage group;

the AC output port is connected with the first energy storage group through the bidirectional inverter circuit and used for providing alternating current for a load.

24. The first power supply of claim 1 or 2, further comprising an AC input port and a detection circuit, the detection circuit connecting the AC input port and the first master control circuit;

the AC input port is used for connecting commercial power;

the detection circuit is used for obtaining a mains supply state signal based on the mains supply state of the AC input port;

the first master control circuit is further used for controlling the condition that the first energy storage group and the second energy storage group are connected in parallel to supply power to the outside based on the commercial power state signal.

25. The first power supply of claim 1, further comprising a charging interface circuit configured to connect to an external power source to charge the first energy storage bank and/or the second energy storage bank.

26. The first power supply of any one of claims 1 to 25, further comprising an external power supply interface for providing power to a load, wherein the external power supply interface comprises at least one of a DC output interface, an AC output interface, a vehicle emergency start output interface, a cigarette lighter interface, a type-c interface, or a USB interface.

27. The first power supply of claim 1, wherein the first power supply is a portable stored energy power supply.

28. A first power source, wherein the first power source is removably connectable to a second power source, the first power source comprising:

a first energy storage bank;

29. A secondary power source, wherein the secondary power source is removably connectable to the primary power source, the secondary power source comprising:

a second energy storage bank;

when the second interface is connected with the first interface, the second energy storage group is controllably connected in parallel with the first energy storage group of the first power supply, so that the first energy storage group and the second energy storage group which are connected in parallel are utilized to supply power to the outside.

30. The secondary power supply of claim 28, wherein the second energy storage group is controllably connected in parallel with the first energy storage group of the first power supply to supply power to the outside by using the first energy storage group and the second energy storage group connected in parallel, when the voltage difference between the first energy storage group and the second energy storage group is smaller than a preset difference value.

31. The secondary power supply of claim 29, further comprising a fourth interface and a mains interface, wherein the fourth interface is connected to the mains interface and the first power supply, and is configured to receive the power provided by the first energy storage bank and the second energy storage bank after being connected in parallel, and supply power to an ac load through the mains interface.

32. A secondary power supply as claimed in claim 29, further comprising a fourth interface and a mains interface, wherein the fourth interface is connected to the mains interface and the first power supply, the mains interface is configured to be connected to an external power supply, and the fourth interface is further configured to provide power to the first power supply based on the power connected to the mains interface.

33. The secondary power supply of claim 29, further comprising a second communication port for communicating with the first power supply.

34. The second power supply of claim 29, further comprising a first switching device disposed in a path of the second energy storage bank connected to the second interface, for controlling a parallel connection status of the first energy storage bank and the second energy storage bank.

35. The secondary power supply of claim 34, further comprising a second communication port for receiving a first communication signal from the first power supply, wherein the first communication signal is configured to turn on the first switching device to connect the first energy storage bank and the second energy storage bank in parallel.

36. The second power supply of claim 34, further comprising a second master control circuit, wherein the second master control circuit is connected to the second communication port and the first switching device, and the second master control circuit receives the first communication signal through the second communication port and controls the first switching device to be turned on according to the first communication signal, so that the first energy storage bank and the second energy storage bank are connected in parallel.

37. The second power supply of claim 30, further comprising a first dc conversion circuit; the first direct current conversion circuit is connected with the second energy storage group and used for converting the electric energy provided by the first energy storage group and then charging the second energy storage group.

38. The secondary power supply of claim 37, further comprising a secondary master control circuit configured to control the first dc converter circuit to operate so that the first energy storage bank can charge the second energy storage bank.

39. The secondary power supply of claim 38, further comprising a second communication port, wherein the second communication port is configured to transmit a second communication signal of the first power supply to the second master control circuit, so that the second master control circuit controls the first dc conversion circuit to operate according to the second communication signal, so that the first energy storage group can charge the second energy storage group.

40. The secondary power supply of claim 29, further comprising a secondary dc converter circuit, connected to the secondary energy storage bank, for converting the electric energy provided by the secondary energy storage bank and outputting the converted electric energy to the primary power supply, so that the secondary energy storage bank can charge the primary energy storage bank.

41. The second power supply of claim 40, further comprising a second master control circuit, wherein the second master control circuit is configured to control the second DC converter circuit to operate according to a third communication signal of the first power supply, so that the second energy storage group can charge the first energy storage group.

42. The secondary power supply of claim 40, further comprising a second communication port, wherein the second communication port is configured to receive a third communication signal of the first power supply, and the third communication signal is configured to control the second DC converter circuit to operate so that the second energy storage bank can charge the first energy storage bank.

43. An energy storage power supply control method, applied to the first power supply of any one of claims 1 to 28; the method comprises the following steps:

44. An energy storage device, comprising:

a first power supply as claimed in any one of claims 1 to 28;

45. An energy storage device, comprising:

a first power supply;

a second power supply according to any one of claims 29 to 42;