CN116388350B

CN116388350B - Charging control method, energy storage device, and readable storage medium

Info

Publication number: CN116388350B
Application number: CN202310652098.8A
Authority: CN
Inventors: 周万程; 张波; 陈攀
Original assignee: Flash Technology Shenzhen Co ltd
Current assignee: Flash Technology Shenzhen Co ltd
Priority date: 2023-06-05
Filing date: 2023-06-05
Publication date: 2023-10-10
Anticipated expiration: 2043-06-05
Also published as: CN116388350A

Abstract

The application discloses a charging control method, energy storage equipment and a readable storage medium, wherein the method comprises the following steps: when the power supply equipment is detected to be connected to the charge-discharge interface, if the power supply equipment meets the power supply condition, acquiring power supply capability information of the power supply equipment; acquiring charging demand information of a battery module; determining a target output voltage of the power supply equipment according to the power supply capability information and the charging demand information, wherein the target output voltage is the output voltage of the power supply equipment when the voltage difference between the input voltage and the output voltage of the DC-DC conversion unit is minimum; the power supply equipment is controlled to output a target output voltage to the DC-DC conversion unit so that the DC-DC conversion unit charges the battery module according to the target output voltage. The method can enable the voltage difference between the input voltage and the output voltage of the DC-DC conversion unit to be minimum, the DC-DC conversion unit charges the battery module with the highest conversion efficiency, and the charging efficiency of the battery module is improved.

Description

Charging control method, energy storage device, and readable storage medium

Technical Field

The present application relates to the field of battery modules, and in particular, to a charging control method, an energy storage device, and a computer readable storage medium.

Background

With the development of the fast charging technology and the battery module technology, various energy storage devices are appeared. The different power requirements and the different battery modules in turn promote the generation of a wide variety of DC-DC (Direct Current to Direct Current ) conversion units, such as unidirectional direct current conversion circuits, bidirectional direct current conversion circuits, buck direct current conversion circuits, boost direct current conversion circuits, buck direct current conversion circuits, and the like. The DC-DC conversion units generally convert a fixed voltage output by the power supply device within a certain voltage range into a voltage required for charging the battery module, and as the charging voltage of the battery module is continuously changed in the charging process, the DC-DC conversion units cannot work at a working point with the highest conversion efficiency, so that the charging efficiency of the battery module is lower.

Therefore, how to improve the charging efficiency of the battery module is a problem to be solved.

Disclosure of Invention

The application provides a charging control method, energy storage equipment and a computer readable storage medium, which can solve the problem that the charging efficiency of a battery module is lower because a DC-DC conversion unit cannot work at the working point with the highest conversion efficiency in the related technology because the charging voltage of the battery module is continuously changed.

In a first aspect, the present application provides a charging control method applied to a power supply controller in an energy storage device, the method comprising:

when the power supply equipment is detected to be connected to the charging and discharging interface, if the power supply equipment meets the preset power supply condition, acquiring power supply capacity information of the power supply equipment; acquiring charging demand information of the battery module; determining a target output voltage of the power supply equipment according to the power supply capability information and the charging demand information, wherein the target output voltage is the output voltage of the power supply equipment when the voltage difference between the input voltage and the output voltage of the DC-DC conversion unit is minimum; and controlling the power supply equipment to output the target output voltage to the DC-DC conversion unit so that the DC-DC conversion unit charges the battery module according to the target output voltage.

According to the method, the target output voltage of the power supply equipment is determined according to the power supply capacity information of the power supply equipment and the charging demand information of the battery module, and the DC-DC conversion unit is controlled to charge the battery module according to the target output voltage, so that the voltage difference between the input voltage and the output voltage of the DC-DC conversion unit is minimized, the battery module is charged by the DC-DC conversion unit with the highest conversion efficiency, and the charging efficiency of the battery module is improved.

In a second aspect, the present application further provides a charging control method applied to a microcontroller in an energy storage device, the method comprising:

when the power supply equipment is detected to be connected to the charging and discharging interface, if the power supply equipment meets a preset power supply condition, acquiring power supply capacity information of the power supply equipment based on the power supply controller; acquiring charging demand information of the battery module; determining a target output voltage of the power supply equipment according to the power supply capability information and the charging demand information, wherein the target output voltage is the output voltage of the power supply equipment when the voltage difference between the input voltage and the output voltage of the DC-DC conversion unit is minimum; and controlling the power supply equipment to output the target output voltage to the DC-DC conversion unit based on the power supply controller so that the DC-DC conversion unit charges the battery module according to the target output voltage.

In a third aspect, the present application also provides an energy storage device comprising a memory and a processor;

the memory is used for storing a computer program;

the processor is configured to execute the computer program and implement the charge control method as described above when the computer program is executed.

In a fourth aspect, the present application also provides a computer-readable storage medium storing a computer program which, when executed by a processor, causes the processor to implement a charge control method as described above.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

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

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

FIG. 3 is a schematic block diagram of an energy storage device according to an embodiment of the present application;

fig. 4 is a schematic flowchart of a charging control method according to an embodiment of the present application;

fig. 5 is a graph showing a relationship between conversion efficiency of a DC-DC conversion unit and different voltage differences;

FIG. 6 is a schematic flow chart of sub-steps for determining a target output voltage provided by an embodiment of the present application;

Fig. 7 is a schematic flowchart of a sub-step of controlling the DC-DC conversion unit to charge the battery module according to an embodiment of the present application;

fig. 8 is a schematic circuit diagram of a first energy storage device according to an embodiment of the present application;

fig. 9 is a schematic circuit diagram of a second energy storage device according to an embodiment of the present application;

fig. 10 is a schematic flowchart of another charge control method provided by an embodiment of the present application;

fig. 11 is a schematic circuit diagram of a third energy storage device according to an embodiment of the present application.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

The flow diagrams depicted in the figures are merely illustrative and not necessarily all of the elements and operations/steps are included or performed in the order described. For example, some operations/steps may be further divided, combined, or partially combined, so that the order of actual execution may be changed according to actual situations.

It is to be understood that the terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this specification 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 the present specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.

Embodiments of the present application provide a charge control method, an energy storage device, and a computer-readable storage medium. The charging control method can be applied to the energy storage equipment, the target output voltage of the power supply equipment is determined according to the power supply capacity information of the power supply equipment and the charging demand information of the battery module, the DC-DC conversion unit is controlled to charge the battery module according to the target output voltage, the voltage difference between the input voltage and the output voltage of the DC-DC conversion unit is enabled to be minimum, the DC-DC conversion unit charges the battery module with the highest conversion efficiency, and the charging efficiency of the battery module is improved.

The energy storage device may include, but is not limited to, a mobile power source, a portable dc energy storage device, and the like. The power supply device may include an external power adapter through which an external power source may be connected to the energy storage device. For example, the external power source may include a photovoltaic charging power source, an ac power source, and the like.

Illustratively, the energy storage device 10 may support a fast charge protocol, which may be charged through a power adapter with a fast charge function. For example, the energy storage device 10 may communicate and charge with a fast-charging enabled power adapter based on the fast-charging protocol of the USB Type-C interface.

It should be noted that, the power adapter with the fast charging function may support a plurality of power supply gears (Power Data Objects, PDO). The power supply gear refers to a plurality of power supply gears with different voltages output by the power adapter, for example, 5V, 9V, 12V, 15V, 20V and the like are supported by the PD3.0 fast charging protocol. In addition, the power adapter with the fast-charging function may or may not support programmable power (Programmable Power Supply, PPS). Wherein programmable power refers to an adapter whose output is dynamically adjustable over a range of voltages. It will be appreciated that the programmable power supply is an optional feature of the PD3.0 fast charge protocol and the PD3.1 fast charge protocol.

Referring to fig. 1, fig. 1 is a schematic diagram of an energy storage device 10 according to an embodiment of the application. As shown in fig. 1, the energy storage device 10 may include a power controller 11, a charge and discharge interface 12, a DC-DC conversion unit 13, a battery module 14, and a battery management system 15, a first end of the DC-DC conversion unit 13 is connected to the charge and discharge interface 12, and a second end of the DC-DC conversion unit 13 is connected to the battery module 14.

Among them, the power controller (Micro-Controller with Power Delivery Controller) 11 can control the DC-DC conversion unit 13 through a digital interface or an analog interface. The DC-DC conversion unit 13 may be connected to a step-up/down circuit (not shown in the figure) for controlling the step-up/down circuit to step up or step down. The charging and discharging interface 12 can be connected with an external power supply through a power adapter, and can also be connected with external electric equipment through the power adapter, so that the energy storage device 10 discharges the electric equipment. The battery management system (Battery Management System, BMS) 15 is configured to perform functions such as charge/discharge management, equalization of series cells, charge/discharge management, overcharge/overdischarge/overtemperature protection, etc. of the battery module 14, for example, charge demand information of the battery module 14 may be collected.

Illustratively, the power supply controller 11 may perform communication interaction with an external power supply device through a communication line of the charge-discharge interface 12, to obtain power supply capability information of the power supply device. When the charge-discharge interface 12 is a USB-C interface, the communication line may include pins such as CC1, CC2, DP, DM, etc.; when the charge/discharge interface 12 is ase:Sub>A USB-ase:Sub>A interface, the communication line may include pins such as DP and DM.

In an embodiment of the present application, the DC-DC converting unit 13 and the power controller 11 may be combined into one System-on-a-chip (SoC).

It should be noted that, by combining the DC-DC conversion unit 13 and the power supply controller 11 into a system on a chip, the degree of freedom of design can be improved, and different usage scenarios can be satisfied.

In some embodiments, the battery management system 15 may be integrated into the system-on-chip, or the battery management system 15 may be disposed outside of the system-on-chip.

Referring to fig. 2, fig. 2 is a schematic diagram of another energy storage device 10 according to an embodiment of the application. As shown in fig. 2, the energy storage device 10 may include a power controller 11, a charge and discharge interface 12, a DC-DC conversion unit 13, a battery module 14, a battery management system 15, and a microcontroller 16, a first end of the DC-DC conversion unit 13 is connected to the charge and discharge interface 12, and a second end of the DC-DC conversion unit 13 is connected to the battery module 14. The microcontroller 16 is connected to the power supply controller 11 and the battery management system 15.

Wherein the microcontroller 16 is an independent controller, and is responsible for man-machine interaction. For example, the microcontroller 16 may communicate with the battery management system 15 to obtain the battery state, the charge state, etc. of the battery module 14, or perform parameter setting on the battery module 14, such as setting a charge-discharge voltage, a current, etc. The microcontroller 16 may also communicate with the power controller 11, for example, may acquire power capability information of the power supply device reported by the power controller 11, and instruct the power controller 11 to control the power supply device to output a target output voltage to the DC-DC conversion unit 13, so that the DC-DC conversion unit 13 charges the battery module 14 according to the target output voltage.

In some embodiments, the microcontroller is integrated on the system-on-chip, or the microcontroller is disposed external to the system-on-chip.

Referring to fig. 3, fig. 3 is a schematic block diagram illustrating a structure of an energy storage device 10 according to an embodiment of the present application. In fig. 3, the energy storage device 10 comprises a processor 1001 and a memory 1002, wherein the processor 1001 and the memory 1002 are connected by a bus, such as an I2C (Inter-integrated Circuit, integrated circuit) bus, a distributed soft bus.

The memory 1002 may include a storage medium and an internal memory, among others. The storage medium may store an operating system and a computer program. The computer programs include program instructions that, when executed, cause the processor 1001 to perform any of a number of energy storage device control methods.

The processor 1001 is used to provide computing and control capabilities to support the operation of the overall energy storage device 10. The processor 1001 may include, for example, the power supply controller 11 of fig. 1 or the microcontroller 16 of fig. 2 described above.

The processor 1001 may be a central processing unit (Central Processing Unit, CPU), which may also be other general purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (application specific integrated circuit, ASIC), field-programmable gate arrays (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

The processor 1001 is configured to execute a computer program stored in the memory 1002, and when executing the computer program, implement the following steps:

When the power supply equipment is detected to be connected to the charge-discharge interface, if the power supply equipment meets the preset power supply condition, acquiring power supply capability information of the power supply equipment; acquiring charging demand information of a battery module; determining a target output voltage of the power supply equipment according to the power supply capability information and the charging demand information, wherein the target output voltage is the output voltage of the power supply equipment when the voltage difference between the input voltage and the output voltage of the DC-DC conversion unit is minimum; the power supply equipment is controlled to output a target output voltage to the DC-DC conversion unit so that the DC-DC conversion unit charges the battery module according to the target output voltage.

In some embodiments, the power supply capability information includes an output voltage corresponding to at least one power supply gear, and whether the power supply device supports programmable power supply and an output voltage range corresponding to the programmable power supply; the processor 1001 is further configured to, after implementing to acquire power capability information of the power supply apparatus, implement:

if the output voltage of all the power supply gears and the output voltage range corresponding to the programmable power supply do not accord with the voltage input range of the DC-DC conversion unit, the power supply equipment is disconnected with the charge-discharge interface.

In some embodiments, the charging demand information includes a charging demand voltage and a charging demand current; the processor 1001 is configured to, when implementing determining the target output voltage of the power supply device according to the power supply capability information and the charging demand information, implement:

Acquiring a minimum voltage difference corresponding to the charging demand current and a preset compensation voltage; and carrying out voltage configuration on the charging demand voltage, the minimum voltage difference and the compensation voltage based on a preset minimum voltage difference formula and power supply capability information to obtain a target output voltage, wherein the target output voltage is an output voltage corresponding to any one power supply gear or any one voltage in an output voltage range corresponding to programmable power supply.

In some embodiments, when implementing controlling the power supply device to output the target output voltage to the DC-DC conversion unit, the processor 1001 is configured to implement:

requesting the power supply device to output a target output voltage; setting the working mode of the DC-DC conversion unit as a charging mode, and carrying out parameter configuration on the DC-DC conversion unit according to the target output voltage; and controlling the conduction of a charging path of the battery module so as to enable the DC-DC conversion unit after parameter configuration to perform voltage conversion on the target output voltage and then charge the battery module.

In some embodiments, the energy storage device further comprises a first switch circuit, a buck-boost circuit and a second switch circuit, wherein a first end of the first switch circuit is connected with the charge-discharge interface, a second end of the first switch circuit is connected with a first end of the buck-boost circuit, a second end of the buck-boost circuit is connected with a positive electrode of the battery module, a first end of the second switch circuit is connected with a negative electrode of the battery module, and a second end of the second switch circuit is connected with the charge-discharge interface; the processor 1001 is configured to, when implementing controlling the charge path of the battery module to be turned on:

Transmitting a first conduction signal to the first switch circuit, so that the first switch circuit conducts connection between the charge-discharge interface and the buck-boost circuit according to the first conduction signal; and sending a second conduction signal to the second switch circuit so that the second switch circuit conducts connection between the battery module and the charge-discharge interface according to the second conduction signal.

In some embodiments, the processor 1001 is further configured to implement:

when the DC-DC conversion unit charges the battery module, current input sampling information and output sampling information of the DC-DC conversion unit are obtained; and adjusting the target output voltage and/or carrying out parameter configuration on the DC-DC conversion unit according to the input sampling information and the output sampling information.

In some embodiments, the processor 1001 is further configured to implement:

when the DC-DC conversion unit charges the battery module, current charging demand information of the DC-DC conversion unit is obtained; based on a preset minimum pressure difference formula, adjusting the target output voltage according to the current charging demand information to obtain an adjusted target output voltage; and controlling the DC-DC conversion unit to charge the battery module according to the regulated target output voltage.

In some embodiments, the processor 1001 is further configured to implement:

When the battery module finishes charging, the second switch circuit is controlled to be turned off; controlling the DC-DC conversion unit to enter a standby mode and controlling the first switching circuit to be turned off; and controlling the power supply equipment to output a preset safety voltage or controlling the power supply equipment to enter a standby mode.

In some embodiments, the processor 1001 is further configured to implement:

and if the disconnection between the power supply equipment and the charge-discharge interface is detected, controlling the energy storage equipment to enter a low-power consumption mode.

In some embodiments, the energy storage device further comprises a battery management system; the processor 1001 is further configured to implement:

after the battery module is charged, if the power supply equipment is detected to be connected with the charging and discharging interface, acquiring battery state information of the battery module acquired by the battery management system; and when the battery state information is that the voltage of the battery module is smaller than a preset voltage threshold or the electric quantity of the battery module is insufficient, executing charging operation.

In some embodiments, the processor 1001 is configured to implement:

when the power supply equipment is detected to be connected to the charge-discharge interface, if the power supply equipment meets the preset power supply condition, acquiring power supply capacity information of the power supply equipment based on the power supply controller; acquiring charging demand information of a battery module; determining a target output voltage of the power supply equipment according to the power supply capability information and the charging demand information, wherein the target output voltage is the output voltage of the power supply equipment when the voltage difference between the input voltage and the output voltage of the DC-DC conversion unit is minimum; the power supply device is controlled to output a target output voltage to the DC-DC conversion unit based on the power supply controller, so that the DC-DC conversion unit charges the battery module according to the target output voltage.

In some embodiments, the power supply capability information includes an output voltage corresponding to at least one power supply gear, and whether the power supply device supports programmable power supply and an output voltage range corresponding to the programmable power supply; the processor 1001 is further configured to implement:

and if the output voltage corresponding to all the power supply gears and the output voltage range corresponding to the programmable power supply do not accord with the voltage input range of the DC-DC conversion unit, the power supply controller is instructed to disconnect the power supply equipment from the charging and discharging interface.

In some embodiments, when implementing controlling the power supply device to output the target output voltage to the DC-DC conversion unit based on the power supply controller, the processor 1001 is configured to implement:

instructing the power supply controller to request the power supply device to output a target output voltage; instructing a power supply controller to set the working mode of the DC-DC conversion unit to a charging mode, and performing parameter configuration on the DC-DC conversion unit according to the target output voltage; and controlling the conduction of a charging path of the battery module so as to enable the DC-DC conversion unit after parameter configuration to perform voltage conversion on the target output voltage and then charge the battery module.

Some embodiments of the present application are described in detail below with reference to the accompanying drawings. The following embodiments and features of the embodiments may be combined with each other without conflict. Referring to fig. 4, fig. 4 is a schematic flowchart of a charging control method according to an embodiment of the application, and as shown in fig. 4, the charging control method includes steps S101 to S104.

Step S101, when detecting that the power supply equipment is connected to the charge-discharge interface, acquiring power supply capability information of the power supply equipment if the power supply equipment meets preset power supply conditions.

It should be noted that, the charging control method provided by the embodiment of the application can be applied to a power supply controller in an energy storage device, and the DC-DC conversion unit is controlled to charge the battery module according to the target output voltage by determining the target output voltage of the power supply device according to the power supply capability information of the power supply device and the charging requirement information of the battery module, so that the voltage difference between the input voltage and the output voltage of the DC-DC conversion unit is minimized, the battery module is charged by the DC-DC conversion unit with the highest conversion efficiency, and the charging efficiency of the battery module is improved. Hereinafter, how the power controller controls the charging of the battery module will be described in detail.

The power supply controller is used for determining whether the power supply equipment meets a preset power supply condition when detecting that the power supply equipment is connected to the charge-discharge interface, and acquiring power supply capability information of the power supply equipment if the power supply equipment meets the preset power supply condition.

The power supply device may include an external power adapter, among other things. For example, the preset power supply condition may be that the power adapter has a quick-charging function, supporting a plurality of power supply gears. For another example, the preset power supply condition may also be that the power adapter supports a plurality of power supply gears and supports programmable power supply.

For example, when the power supply apparatus supports a plurality of power supply gear positions, it may be determined that the power supply apparatus satisfies the power supply condition, and then the power supply controller communicates with an external power supply adapter through the charge-discharge interface to acquire power supply capability information of the power supply adapter.

The power supply capability information may include an output voltage corresponding to at least one power supply gear, and whether the power supply device supports programmable power supply and an output voltage range corresponding to the programmable power supply. For example, the power capability information of the power adapter may include a plurality of power supply gearsAnd programmable power is not supported. For another example, the power capability information of the power adapter may include output voltages of a plurality of power supply gearsThe output voltage range corresponding to the programmable power supply is。

By acquiring the power supply capability information of the power supply device, the embodiment can obtain whether the power supply device supports programmable power supply or not and the output voltage range corresponding to the programmable power supply.

In some embodiments, obtaining power capability information of a power supply device may include: sending a power supply capability request message to a power supply device; and receiving the power supply capability information returned by the power supply equipment according to the power supply capability request message.

The power supply controller may send a power supply capability request message to the power supply adapter through the charge-discharge interface, and then receive power supply capability information returned by the power supply adapter according to the power supply capability request message.

It should be noted that, in the embodiment of the present application, after the power supply capability information of the power supply device is acquired, in order to ensure that the DC-DC conversion unit can perform voltage conversion normally, it is also necessary to determine whether the output voltage in the power supply capability information meets the voltage input range of the DC-DC conversion unit.

In some embodiments, after obtaining the power supply capability information of the power supply device, the charging control method provided by the embodiment of the present application may further include: if the output voltage of all the power supply gears and the output voltage range corresponding to the programmable power supply do not accord with the voltage input range of the DC-DC conversion unit, the power supply equipment is disconnected with the charge-discharge interface.

Exemplary, if the output voltage of all power supply gears of the power adapterThe power adapter is not in the voltage input range of the DC-DC conversion unit, and the output voltage range corresponding to the programmable power supply of the power adapter is not intersected with the voltage input range of the DC-DC conversion unit, so that the power adapter can be disconnected from the charging and discharging interface.

The above embodiment can ensure that the DC-DC conversion unit can normally perform voltage conversion by determining whether the output voltage of all the power supply steps and the output voltage range corresponding to the programmable power supply conform to the voltage input range of the DC-DC conversion unit.

Step S102, obtaining charging requirement information of the battery module.

The power supply controller may also obtain charging demand information of the battery module, for example. For example, the power management system may be read to collect charging demand information of the battery module. The charging demand information may include a charging demand voltage, a charging demand current, and the like, among others. The charge demand voltage may be expressed asThe charging demand current may be expressed as +.>。

It should be noted that, by acquiring the charging demand information of the battery module, the target output voltage may be determined subsequently according to the charging demand information and the power supply capability information.

Step S103, determining a target output voltage of the power supply equipment according to the power supply capability information and the charging demand information, wherein the target output voltage is the output voltage of the power supply equipment when the voltage difference between the input voltage and the output voltage of the DC-DC conversion unit is minimum.

For example, after the power supply capability information of the power supply device and the charging demand information of the battery module are acquired, the target output voltage of the power supply device may be determined according to the power supply capability information and the charging demand information. The target output voltage is the output voltage of the power supply device when the voltage difference between the input voltage and the output voltage of the DC-DC conversion unit is minimum.

In the case of a DC-DC conversion unit, the larger the voltage difference between the input voltage and the output (load) voltage is, the lower the conversion efficiency of the DC-DC conversion unit is, whereas the smaller the voltage difference between the input voltage and the output voltage is, the higher the conversion efficiency of the DC-DC conversion unit is.

Referring to fig. 5, fig. 5 is a graph showing a relationship between conversion efficiency of a DC-DC conversion unit and different voltage differences. As shown in fig. 5, the abscissa represents the current of the DC-DC conversion unit, the ordinate represents the conversion efficiency of the DC-DC conversion unit, and 3 curves represent three differential pressures of 5V, 3V, and 1.8V, respectively. The max. Efficiency Point means the highest conversion efficiency Point of the DC-DC conversion unit when the current is greater than a certain value, that is, the conversion efficiency of the DC-DC conversion unit may be highest when the voltage difference is 1.8V. Cross point means that when the current is smaller than a certain value, the conversion efficiency of the DC-DC converter with a large voltage difference is rather higher.

Referring to fig. 6, fig. 6 is a schematic flowchart of a sub-step of determining a target output voltage provided in an embodiment of the present application, and determining the target output voltage of the power supply device according to the power supply capability information and the charging requirement information in step S103 may include the following steps S1031 and S1032.

Step S1031, obtaining a minimum voltage difference corresponding to the charging demand current and a preset compensation voltage.

For example, when determining the target output voltage, it is necessary to first obtain the minimum voltage difference corresponding to the charging demand current.

The minimum voltage difference corresponding to different currents is different. For example, as shown in fig. 5, when the current is less than 0.8A, the conversion efficiency corresponding to the minimum differential pressure of 3V is highest; when the current is greater than 0.8A, the conversion efficiency is highest corresponding to a minimum voltage difference of 1.8V.

For example, when determining the target output voltage, a preset compensation voltage is also acquired. Wherein the compensation voltage can be expressed as. Compensation voltage->The specific values may be set according to actual conditions, and are not limited herein.

The compensation voltage is as followsIs a compensation value set for the circuit design, voltage loss generated by the passive device. It will be appreciated that different hardware designs, different passive devices and systems at different operating temperatures will have different voltage losses, so in order to be able to precisely control the DC-DC conversion unit to operate at the highest conversion efficiency, it is therefore necessary to increase the compensation voltage +.>。

Step S1032, based on a preset minimum differential pressure formula and power supply capability information, carrying out voltage configuration on the charging demand voltage, the minimum differential pressure and the compensation voltage to obtain a target output voltage, wherein the target output voltage is an output voltage corresponding to any one power supply gear or any one voltage in an output voltage range corresponding to programmable power supply.

For example, after the minimum voltage difference corresponding to the charging demand current and the preset compensation voltage are obtained, the charging demand voltage, the minimum voltage difference and the compensation voltage may be voltage configured based on the preset minimum voltage difference formula and the power supply capability information, so as to obtain the target output voltage.

The target output voltage is output voltage corresponding to any one power supply gear or any one voltage in an output voltage range corresponding to programmable power supply. The power adapter can be ensured to output the target output voltage by configuring the target output voltage to be any one of the output voltages corresponding to any one of the power supply gears or any one of the voltages within the output voltage range corresponding to the programmable power supply.

Illustratively, the minimum differential pressure formula is as follows:

in the method, in the process of the invention,indicating that the DC-DC conversion unit is +.>In the case of (a) operating at maximum conversion efficiency, corresponding minimum voltage difference, different DC-DC conversion units, corresponding minimum voltage difference +.>May also be different; />Output voltage which can be the power supply gear of a power adapterAny one of the above can also be the output voltage range of programmable power supply +.>A specific voltage of the same.

For example, the charge demand voltage may beMinimum differential pressure->CompensationVoltage->Substituting the minimum voltage difference formula to perform voltage configuration to obtain configured output voltage +.>And will configure the output voltage +.>Is determined as the target output voltage.

According to the embodiment, the voltage configuration is performed on the charging demand voltage, the minimum voltage difference and the compensation voltage based on the minimum voltage difference formula and the power supply capability information, so that the voltage difference between the input voltage and the output voltage of the subsequent DC-DC conversion unit is minimum when the battery module is charged according to the target output voltage, and the DC-DC conversion unit can charge the battery module with the highest conversion efficiency, and the charging efficiency of the battery module is improved. In addition, the DC-DC conversion unit charges the battery module according to the target output voltage, so that the loss of the whole system in a charging state can be reduced, and the heating is reduced.

Step S104, the power supply equipment is controlled to output a target output voltage to the DC-DC conversion unit so that the DC-DC conversion unit can charge the battery module according to the target output voltage.

For example, after the target output voltage is obtained, the power supply apparatus may be controlled to output the target output voltage to the DC-DC conversion unit for the DC-DC conversion unit to charge the battery module according to the target output voltage. Hereinafter, how to control the DC-DC conversion unit to charge the battery module will be described in detail.

Referring to fig. 7, fig. 7 is a schematic flowchart of a sub-step of controlling the DC-DC conversion unit to charge the battery module according to an embodiment of the present application, which may include the following steps S1041 to S1043.

Step S1041, requesting the power supply device to output the target output voltage.

Illustratively, the power supply controller may provide power to the power adapterRequest to output target output voltage. The specific request method is not limited herein.

Step S1042, setting the operation mode of the DC-DC conversion unit to the charging mode, and performing parameter configuration on the DC-DC conversion unit according to the target output voltage.

In the embodiment of the application, before the DC-DC conversion unit is controlled to charge the battery module, the working mode and the working parameters of the DC-DC conversion unit are required to be configured.

For example, the power supply controller may communicate with the DC-DC conversion unit to set the operation mode of the DC-DC conversion unit to the charging mode. It should be noted that, the operation modes of the DC-DC conversion unit may include a discharging mode and a charging mode, and the DC-DC conversion unit needs to operate in the charging mode when the battery module is charged.

By setting the operation mode of the DC-DC conversion unit to the charging mode, it is possible to ensure that the DC-DC conversion unit realizes charging of the battery module.

For example, the DC-DC conversion unit may be parameter-configured according to the target output voltage. For example, the duty ratio of a PWM (Pulse-Width Modulation) signal output from the DC-DC conversion unit may be configured according to the target output voltage. The PWM signal output from the DC-DC converter is used to drive the switching tube in the buck-boost circuit. The specific process of configuring the PWM signal according to the target output voltage is not limited herein.

According to the embodiment, the DC-DC conversion unit is subjected to parameter configuration according to the target output voltage, so that the voltage difference between the input voltage and the output voltage of the DC-DC conversion unit is minimized, the DC-DC conversion unit can charge the battery module with the highest conversion efficiency, and the charging efficiency of the battery module is improved.

Step S1043, controlling the charging path of the battery module to be turned on, so that the DC-DC conversion unit after parameter configuration performs voltage conversion on the target output voltage and charges the battery module.

It should be noted that, after the DC-DC conversion unit is controlled to the battery module, the charging path of the battery module needs to be controlled to be turned on.

Referring to fig. 8, fig. 8 is a schematic circuit diagram of a first energy storage device 10 according to an embodiment of the application. As shown in fig. 8, the energy storage device 10 may include a power controller 11, a charge/discharge interface 12, a DC-DC conversion unit 13, a battery module 14, and a battery management system 15, and may further include a first switch circuit 17, a step-up/down circuit 18, and a second switch circuit 19, where a first end of the first switch circuit 17 is connected to the charge/discharge interface 12, a second end of the first switch circuit 17 is connected to a first end of the step-up/down circuit 18, a second end of the step-up/down circuit 18 is connected to an anode of the battery module 14, a first end of the second switch circuit 19 is connected to a cathode of the battery module 14, and a second end of the second switch circuit 19 is connected to the charge/discharge interface 13.

The first switching circuit 17 may comprise, for example, one switching tube, but may also comprise a plurality of switching tubes. The buck-boost circuit 18 may include a power inductor, four switching transistors, a resistor, and a capacitor, where the buck-boost circuit 18 is configured to boost or buck the output voltage of the power adapter to charge the battery module 14, and further configured to boost or buck the output voltage of the battery module 14 to supply power to external electric devices. The second switching circuit 19 may include at least two switching transistors for implementing charge control or discharge control of the battery module 14 by the battery management system 15. The switching transistors in the first switching circuit 17, the buck-boost circuit 18, and the second switching circuit 19 may include, but are not limited to, a transistor, a field-effect transistor (MOS) -Semiconductor Field-Effect Transistor, an insulated gate bipolar transistor (Insulated Gate Bipolar Transistor, IGBT), or the like.

It should be noted that, when the battery module needs to be charged or discharged, the buck-boost circuit 18 may be a bidirectional buck-boost circuit; the buck-boost circuit 18 may be a unidirectional buck-boost circuit when only the battery module needs to be charged.

In some embodiments, controlling the charge path of the battery module to be conductive may include: transmitting a first conduction signal to the first switch circuit, so that the first switch circuit conducts connection between the charge-discharge interface and the buck-boost circuit according to the first conduction signal; and sending a second conduction signal to the second switch circuit so that the second switch circuit conducts connection between the battery module and the charge-discharge interface according to the second conduction signal.

The first conducting signal and the second conducting signal may be high level signals or low level signals, and may be determined based on the types of the switching tubes in the first switching circuit and the second switching circuit.

For example, as shown in fig. 8, the charging path of the battery module 14 may include a charge-discharge interface 12→a first switch circuit 17→a step-up-down circuit 18→the battery module 14→a second switch circuit 19→the charge-discharge interface 12.

For example, if the switching transistors in the first switching circuit and the second switching circuit are set to be turned on according to the high-level signal, the high-level signal may be sent to the first switching circuit, so that the first switching circuit turns on the connection between the charge-discharge interface and the buck-boost circuit according to the high-level signal, and sends the high-level signal to the second switching circuit, so that the second switching circuit turns on the connection between the battery module and the charge-discharge interface according to the high-level signal.

For example, after the charging path of the battery module is controlled to be turned on, the DC-DC conversion unit after the parameter configuration may perform voltage conversion on the target output voltage and then charge the battery module. At this time, the voltage difference between the input voltage and the output voltage of the DC-DC conversion unit is minimum, and the DC-DC conversion unit charges the battery module with the highest conversion efficiency, thereby improving the charging efficiency of the battery module.

In some embodiments, the charging control method provided by the embodiment of the present application may further include: when the DC-DC conversion unit charges the battery module, current input sampling information and output sampling information of the DC-DC conversion unit are obtained; and adjusting the target output voltage and/or carrying out parameter configuration on the DC-DC conversion unit according to the input sampling information and the output sampling information.

When the battery module is charged, the temperature of the passive device in the DC-DC conversion unit may change, which may cause a change in voltage loss. In order to accurately control the DC-DC conversion unit to work at the highest conversion efficiency, it is necessary to adjust the target output voltage and/or to parameter-configure the DC-DC conversion unit during the charging process.

Illustratively, when the DC-DC conversion unit charges the battery module, current input sampling information and output sampling information of the DC-DC conversion unit are obtained. The input sampling information may include a sampling voltage of an input terminal of the DC-DC conversion unitAnd sample current +.>The method comprises the steps of carrying out a first treatment on the surface of the The output sampling information may include a sampling voltage of an output terminal of the DC-DC conversion unit>And sample current +.>。

According to the embodiment, the target output voltage is adjusted and/or the DC-DC conversion unit is subjected to parameter configuration according to the current input sampling information and the current output sampling information of the DC-DC conversion unit, so that the DC-DC conversion unit can be accurately controlled to work at the highest conversion efficiency.

Referring to fig. 9, fig. 9 is a schematic circuit diagram of a second energy storage device 10 according to an embodiment of the application. As shown in fig. 9, the energy storage device 10 may further include a first sampling circuit 20 and a second sampling circuit 21, where the first sampling circuit 20 is used to collect a sampled voltage at an input terminal of the DC-DC conversion unitAnd sample current +.>Second sampling circuit21 sampling voltage for output of DC-DC conversion unit +.>And sample current +.>. The connection manner and circuit structure of the first sampling circuit 20 and the second sampling circuit 21 and other circuits and controllers in the energy storage device 10 can be seen in fig. 9, and the description thereof will be omitted.

For example, the current input sampling information and output sampling information of the DC-DC conversion unit may be collected by the first sampling circuit 20 and the second sampling circuit 21 in fig. 9, and then the target output voltage may be adjusted and/or the DC-DC conversion unit may be parameter-configured according to the input sampling information and the output sampling information.

For example, when sampling currentWhen increasing, can be according to the sampling current +.>Updating minimum differential pressure +.>Then based on the minimum pressure difference formula, outputting the voltage to the target>Adjusting and outputting the voltage +.>And carrying out parameter configuration on the DC-DC conversion unit.

Also for example, it is possible to use the sampled voltageAnd sample voltage +.>Determining compensation voltageWhether or not to increase; when compensating voltage->When increasing, the target output voltage can be calculated based on the minimum pressure difference formulaAdjusting and outputting the voltage +.>And carrying out parameter configuration on the DC-DC conversion unit.

According to the embodiment, the target output voltage is adjusted and/or the DC-DC conversion unit is subjected to parameter configuration according to the input sampling information and the output sampling information, so that the target output voltage can be adjusted in time, the DC-DC conversion unit is subjected to parameter configuration, the voltage difference between the input voltage and the output voltage of the DC-DC conversion unit is minimum, and the battery module is charged by the DC-DC conversion unit with the highest conversion efficiency.

In other embodiments, the charging control method provided by the embodiment of the present application may further include: when the DC-DC conversion unit charges the battery module, current charging demand information of the battery module is obtained; based on a preset minimum pressure difference formula, adjusting the target output voltage according to the current charging demand information to obtain an adjusted target output voltage; and controlling the DC-DC conversion unit to charge the battery module according to the regulated target output voltage.

It should be noted that, when the battery module is charged, according to the battery charging curve, the charging voltages corresponding to the battery module in different charging phases are different, and the charging voltages in the same charging phase are not constant, so that the charging voltages of the battery module need to be continuously adjusted. The charging stage may include a trickle charging stage, a precharge stage, a constant current charging stage, a constant voltage charging stage, a charge cutoff stage, and the like.

For example, the battery management system 15 reads the current charging requirement information of the battery module, adjusts the target output voltage according to the current charging requirement information based on a preset minimum pressure difference formula, and obtains the adjusted target output voltage. Wherein the current charging demand information may include a charging demand voltage And charging demand current->。

For example, when the charging demand voltageWhen increasing, the target output voltage can be +_ based on the minimum differential pressure formula>Adjusting to obtain the adjusted target output voltage +.>Then, according to the adjusted target output voltage +.>And carrying out parameter configuration on the DC-DC conversion unit. Also for example, when the charging demand current +.>When the current is changed, the current can be increased according to the charging demand>Updating minimum differential pressure +.>Then based on the minimum pressure difference formula, outputting the voltage to the target>AdjustingIntegral and according to the adjusted target output voltage +.>And carrying out parameter configuration on the DC-DC conversion unit.

It should be noted that, since the charging demand voltage of the battery module is continuously changed during the charging process, the target output voltage needs to be continuously adjusted, so as to ensure that the DC-DC conversion unit always charges the battery module with the highest conversion efficiency.

According to the embodiment, the target output voltage is adjusted according to the current charging demand information based on the minimum pressure difference formula, so that the target output voltage can be adjusted in time, and the parameter configuration can be performed on the DC-DC conversion unit, so that the pressure difference between the input voltage and the output voltage of the DC-DC conversion unit is minimum, and the DC-DC conversion unit charges the battery module with the highest conversion efficiency.

In some embodiments, the charging control method provided by the embodiment of the present application may further include: when the battery module finishes charging, the second switch circuit is controlled to be turned off; controlling the DC-DC conversion unit to enter a standby mode and controlling the first switching circuit to be turned off; and controlling the power supply equipment to output a preset safety voltage or controlling the power supply equipment to enter a standby mode.

For example, as shown in fig. 8 or 9, the state of charge of the battery module 14 may be read by the battery management system 15, and the second switch circuit 19 may be controlled to be turned off when it is determined that the battery module 14 is completely charged. For example, a shutdown signal may be transmitted to the second switching circuit 19 such that the second switching circuit 19 disconnects the battery module 14 from the charge-discharge interface 12 according to the shutdown signal.

It should be noted that, by controlling the second switch circuit 19 to be turned off when it is determined that the battery module 14 is charged, the battery module 14 can be prevented from being overcharged.

For example, upon determining that the battery module 14 is charged, the DC-DC conversion unit 13 may be further controlled to enter a standby mode, and the first switching circuit 17 may be controlled to be turned off.

It should be noted that, by controlling the DC-DC conversion unit 13 to enter the standby mode and controlling the first switch circuit 17 to be turned off when it is determined that the battery module 14 is charged, it is possible to reduce the power consumption of the DC-DC conversion unit 13 and to avoid the first switch circuit 17 from continuing to input power to the step-up/step-down circuit 18.

For example, when it is determined that the battery module 14 is charged, the power supply apparatus may be controlled to output a preset safety voltage or to enter a standby mode. The preset safety voltage can be set according to practical situations, and specific values are not limited herein.

It should be noted that, when it is determined that the battery module 14 completes charging, the power supply device is controlled to output a preset safety voltage, or the power supply device is controlled to enter a standby mode, so that the power supply device can be prevented from continuously outputting a high voltage, and charging safety is ensured.

In some embodiments, the charging control method provided by the embodiment of the present application may further include: and if the disconnection between the power supply equipment and the charge-discharge interface is detected, controlling the energy storage equipment to enter a low-power consumption mode.

For example, after determining that the battery module completes charging, if it is detected that the power supply device is disconnected from the charging and discharging interface, the energy storage device may be controlled to enter a low power consumption mode.

It should be noted that, when the power supply device is disconnected from the charging and discharging interface, the energy storage device is controlled to enter a low-power consumption mode, so that the working power of the energy storage device can be reduced, and the electric quantity of the battery module is saved.

In some embodiments, the charging control method provided by the embodiment of the present application may further include: after the battery module is charged, if the power supply equipment is detected to be connected with the charging and discharging interface, acquiring battery state information of the battery module acquired by the battery management system; and when the battery state information is that the voltage of the battery module is smaller than a preset voltage threshold or the electric quantity of the battery module is insufficient, executing charging operation.

For example, battery state information of the battery module collected by the battery management system may be read. Wherein the battery status information may include a voltage.

For example, when it is determined that the voltage of the battery module is less than the preset voltage threshold, the charging operation is performed. Or when the battery management system reports that the electric quantity of the battery module is insufficient, the charging operation is executed. The preset voltage threshold may be set according to practical situations, and specific values are not limited herein.

It should be noted that, the charging operation may refer to the process of controlling the DC-DC conversion unit to charge the battery module according to the target output voltage in the above embodiment, which is not described herein.

In the above embodiment, the battery module may be charged in time by performing the charging operation when the battery state information indicates that the voltage of the battery module is less than the preset voltage threshold or the electric quantity of the battery module is insufficient.

Referring to fig. 10, fig. 10 is a schematic flowchart of a third charge control method according to an embodiment of the application, and as shown in fig. 10, the charge control method includes steps S201 to S204.

Step 201, when it is detected that the power supply device is connected to the charge-discharge interface, if the power supply device meets a preset power supply condition, power supply capability information of the power supply device is obtained based on the power supply controller.

It should be noted that, the charging control method provided by the embodiment of the application can be applied to a microcontroller in an energy storage device, and the target output voltage of the power supply device is determined according to the power supply capability information of the power supply device and the charging requirement information of the battery module, and the DC-DC conversion unit is controlled to charge the battery module according to the target output voltage, so that the voltage difference between the input voltage and the output voltage of the DC-DC conversion unit is minimized, the DC-DC conversion unit charges the battery module with the highest conversion efficiency, and the charging efficiency of the battery module is improved. The following describes in detail how the microcontroller controls the battery module to charge.

The microcontroller may, for example, determine via the power supply controller whether a power supply device is connected to the charge-discharge interface. For example, the power supply controller can communicate with the microcontroller, and the power supply device is reported to be connected to the charge-discharge interface.

For example, when it is determined that the power supply device is connected to the charge-discharge interface. The microcontroller can determine whether the power supply equipment meets preset power supply conditions, and if the power supply equipment meets the preset power supply conditions, the power supply controller is instructed to acquire power supply capability information of the power supply equipment. The power supply capability information may include an output voltage corresponding to at least one power supply gear, and whether the power supply device supports programmable power supply and an output voltage range corresponding to the programmable power supply.

It can be appreciated that, for a specific manner of acquiring the power supply capability information of the power supply device, reference may be made to the embodiment in step 101, which is not described herein.

In some embodiments, the charging control method provided by the embodiment of the present application may further include: and if the output voltage corresponding to all the power supply gears and the output voltage range corresponding to the programmable power supply do not accord with the voltage input range of the DC-DC conversion unit, the power supply controller is instructed to disconnect the power supply equipment from the charging and discharging interface.

Exemplary, if the output voltage of all power supply gears of the power adapterThe microcontroller can send a turn-off instruction to the power supply controller so that the power supply controller can disconnect the power supply adapter from the charging and discharging interface according to the turn-off instruction.

According to the embodiment, whether the output voltage in the power supply capability information accords with the voltage input range of the DC-DC conversion unit or not is judged, so that the output voltage of the power adapter can be determined to be matched with the voltage of the normal operation of the DC-DC conversion unit, and the DC-DC conversion unit can be ensured to normally perform voltage conversion.

Step S202, obtaining charging requirement information of the battery module.

For example, the microcontroller may communicate with a power management system that reads the charging demand information of the battery module collected by the power management system. The charging demand information may include a charging demand voltage, a charging demand current, and the like, among others.

Step S203, determining a target output voltage of the power supply device according to the power supply capability information and the charging requirement information, where the target output voltage is an output voltage of the power supply device when a voltage difference between an input voltage and an output voltage of the DC-DC conversion unit is minimum.

For example, after acquiring the power supply capability information of the power supply device and the charging demand information of the battery module, the microcontroller may determine the target output voltage of the power supply device according to the power supply capability information and the charging demand information. The target output voltage is the output voltage of the power supply device when the voltage difference between the input voltage and the output voltage of the DC-DC conversion unit is minimum.

In some embodiments, determining the target output voltage of the power supply device according to the power supply capability information and the charging demand information may include: acquiring a minimum voltage difference corresponding to the charging demand current and a preset compensation voltage; and carrying out voltage configuration on the charging demand voltage, the minimum voltage difference and the compensation voltage based on a preset minimum voltage difference formula and power supply capability information to obtain a target output voltage, wherein the target output voltage is an output voltage corresponding to any one power supply gear or any one voltage in an output voltage range corresponding to programmable power supply.

It is understood that the specific process of determining the target output voltage of the power supply device is the same as the above-mentioned step S1031 and step S1032, and will not be described herein.

Step S204, the power supply device is controlled to output a target output voltage to the DC-DC conversion unit based on the power supply controller, so that the DC-DC conversion unit charges the battery module according to the target output voltage.

For example, after the target output voltage is obtained, the power supply apparatus may be controlled to output the target output voltage to the DC-DC conversion unit based on the power supply controller, so that the DC-DC conversion unit charges the battery module according to the target output voltage. Hereinafter, how to control the DC-DC conversion unit to charge the battery module will be described in detail.

In some embodiments, controlling the power supply apparatus to output the target output voltage to the DC-DC conversion unit based on the power supply controller, so that the DC-DC conversion unit charges the battery module according to the target output voltage may include: instructing the power supply controller to request the power supply device to output a target output voltage; instructing a power supply controller to set the working mode of the DC-DC conversion unit to a charging mode, and performing parameter configuration on the DC-DC conversion unit according to the target output voltage; and controlling the conduction of a charging path of the battery module so as to enable the DC-DC conversion unit after parameter configuration to perform voltage conversion on the target output voltage and then charge the battery module.

It is understood that the DC-DC conversion unit is controlled to charge the battery module, similar to the steps S1041 to S1043 described above, and will not be described herein.

Referring to fig. 11, fig. 11 is a schematic circuit diagram of another energy storage device 10 according to an embodiment of the application. As shown in fig. 11, the energy storage device 10 may include a power controller 11, a charge-discharge interface 12, a DC-DC conversion unit 13, a battery module 14, a battery management system 15, a microcontroller 16, a first switching circuit 17, a step-up-down circuit 18, a second switching circuit 19, a first sampling circuit 20, and a second sampling circuit 21.

As shown in fig. 11, a first end of the first switch circuit 17 is connected to the charge/discharge interface 12, a second end of the first switch circuit 17 is connected to a first end of the first sampling circuit 20, a second end of the first sampling circuit 20 is connected to a first end of the step-up/down circuit 18, a second end of the step-up/down circuit 18 is connected to a first end of the second sampling circuit 21, and a second end of the second sampling circuit 21 is connected to the positive electrode of the battery module 14. The first end of the second switch circuit 19 is connected to the negative electrode of the battery module 14, and the second end of the second switch circuit 19 is connected to the charge/discharge interface 12.

As shown in fig. 11, the microcontroller 16 is connected to the power supply controller 11 and the battery management system 15, and the battery management system 15 is connected to the second switch circuit 19. The power supply controller 11 is connected to the charge/discharge interface 12, and the power supply controller 11 is also connected to the DC-DC conversion unit 13. The DC-DC conversion unit 13 is connected to the step-up/step-down circuit 18, and also connected to the first sampling circuit 20 and the second sampling circuit 21, respectively.

In some embodiments, when the microcontroller 16 controls the charge path of the battery module to be turned on, the microcontroller may send a first turn-on signal to the first switch circuit 17, so that the first switch circuit 17 turns on the connection between the charge-discharge interface 12 and the buck-boost circuit 18 according to the first turn-on signal; the microcontroller 16 sends a second conducting signal to the second switch circuit 19, so that the second switch circuit 19 conducts the connection between the battery module 14 and the charge-discharge interface 12 according to the second conducting signal.

In some embodiments, when the DC-DC conversion unit 13 charges the battery module 14, the microcontroller 16 may acquire current input sampling information and output sampling information of the DC-DC conversion unit 13; the target output voltage is adjusted and/or the DC-DC conversion unit 13 is parameter-configured according to the input sampling information and the output sampling information. Wherein the input sampling information is collected by the first sampling circuit 20 and the output sampling information is collected by the second sampling circuit 21.

It will be appreciated that the process of adjusting the target output voltage and/or configuring the DC-DC converting unit 13 by the microcontroller 16 is similar to the process of adjusting the target output voltage and/or configuring the DC-DC converting unit 13 by the power controller 11, which is not described herein.

In some embodiments, when the DC-DC conversion unit 13 charges the battery module 14, the microcontroller 16 may obtain current charging requirement information of the battery module 14; based on a preset minimum pressure difference formula, adjusting the target output voltage according to the current charging demand information to obtain an adjusted target output voltage; the DC-DC conversion unit 13 is controlled to charge the battery module 14 according to the adjusted target output voltage.

Wherein the current charging demand information of the battery module 14 is read by the battery management system 15.

It is understood that the process of adjusting the target output voltage by the microcontroller 16 is similar to the process of adjusting the target output voltage by the power controller 11, and will not be described herein.

In some embodiments, when the battery module 14 completes charging, the microcontroller 16 controls the second switching circuit 19 to turn off; the microcontroller 16 controls the DC-DC conversion unit 13 to enter a standby mode, and controls the first switching circuit 17 to be turned off; the microcontroller 16 controls the power supply device to output a preset safety voltage or controls the power supply device to enter a standby mode.

In some embodiments, the microcontroller 16 may control the energy storage device to enter a low power consumption mode if a disconnection of the power supply device from the charge-discharge interface 12 is detected. For example, the microcontroller 16 may instruct the power supply controller 11 to control the energy storage device to enter a low power consumption mode.

In some embodiments, after the battery module 14 completes charging, if the microcontroller 16 detects that the power supply device is connected to the charging and discharging interface 12, the battery state information of the battery module 14 collected by the battery management system 15 is obtained; when the battery state information is that the voltage of the battery module 14 is less than a preset voltage threshold or the electric quantity of the battery module 14 is insufficient, a charging operation is performed.

The embodiment of the application also provides a computer readable storage medium, wherein the computer readable storage medium stores a computer program, the computer program comprises program instructions, and a processor executes the program instructions to realize any one of the charging control methods provided by the embodiment of the application. For example, the computer program is loaded by a processor, the following steps may be performed:

As another example, the computer program being loaded by a processor, the following steps may be performed:

The specific implementation of each operation above may be referred to the previous embodiments, and will not be described herein.

The computer readable storage medium may be an internal storage unit of the energy storage device of the foregoing embodiment, for example, a hard disk or a memory of the energy storage device. The computer readable storage medium may also be an external storage device of the energy storage device, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital Card (SD), a Flash memory Card (Flash Card), etc. that are provided on the energy storage device.

The present application is not limited to the above embodiments, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the present application, and these modifications and substitutions are intended to be included in the scope of the present application. Therefore, the protection scope of the application is subject to the protection scope of the claims.

Claims

1. The utility model provides a charge control method, is applied to the power controller in energy storage equipment, characterized in that, energy storage equipment still includes charge-discharge interface, DC-DC conversion unit and battery module, DC-DC conversion unit's first end with charge-discharge interface connects, DC-DC conversion unit's second end with battery module connects, the method includes:

when the power supply equipment is detected to be connected to the charging and discharging interface, if the power supply equipment meets the preset power supply condition, acquiring power supply capacity information of the power supply equipment;

acquiring charging demand information of the battery module;

determining a target output voltage of the power supply equipment according to the power supply capability information and the charging demand information, wherein the target output voltage is the output voltage of the power supply equipment when the voltage difference between the input voltage and the output voltage of the DC-DC conversion unit is minimum;

Controlling the power supply equipment to output the target output voltage to the DC-DC conversion unit so that the DC-DC conversion unit charges the battery module according to the target output voltage;

the power supply capability information comprises at least one output voltage corresponding to a power supply gear, whether the power supply equipment supports programmable power supply or not and an output voltage range corresponding to the programmable power supply;

the charging demand information includes a charging demand voltage and a charging demand current; the determining, according to the power supply capability information and the charging requirement information, a target output voltage of the power supply device includes: acquiring a minimum voltage difference corresponding to the charging demand current and a preset compensation voltage; performing voltage configuration on the charging demand voltage, the minimum voltage difference and the compensation voltage based on a preset minimum voltage difference formula and the power supply capability information to obtain the target output voltage, wherein the target output voltage is any one output voltage corresponding to the power supply gear or any one voltage in an output voltage range corresponding to the programmable power supply; the minimum differential pressure formula is as follows:

in the method, in the process of the invention, Indicating that the DC-DC conversion unit is at +.>A corresponding minimum pressure difference at maximum conversion efficiency; />Is any one of the output voltages of the power supply gears of the power supply adapter corresponding to the power supply equipment or the voltage in the output voltage range of the programmable power supply.

2. The charge control method according to claim 1, characterized in that after the acquisition of the power supply capability information of the power supply apparatus, the method further comprises:

and if the output voltage of all the power supply gears and the output voltage range corresponding to the programmable power supply do not accord with the voltage input range of the DC-DC conversion unit, disconnecting the power supply equipment from the charging and discharging interface.

3. The charge control method according to claim 1, wherein the controlling the power supply apparatus to output the target output voltage to the DC-DC conversion unit for the DC-DC conversion unit to charge the battery module according to the target output voltage includes:

requesting the power supply device to output the target output voltage;

setting the working mode of the DC-DC conversion unit as a charging mode, and carrying out parameter configuration on the DC-DC conversion unit according to the target output voltage;

And controlling the conduction of a charging path of the battery module so that the DC-DC conversion unit after parameter configuration performs voltage conversion on the target output voltage and then charges the battery module.

4. The charge control method according to claim 3, wherein the energy storage device further comprises a first switch circuit, a step-up and step-down circuit, and a second switch circuit, a first end of the first switch circuit is connected to the charge-discharge interface, a second end of the first switch circuit is connected to the first end of the step-up and step-down circuit, a second end of the step-up and step-down circuit is connected to a positive electrode of the battery module, a first end of the second switch circuit is connected to a negative electrode of the battery module, and a second end of the second switch circuit is connected to the charge-discharge interface;

the controlling the conduction of the charging path of the battery module comprises:

transmitting a first conduction signal to the first switch circuit, so that the first switch circuit conducts connection between the charge-discharge interface and the step-up/step-down circuit according to the first conduction signal;

and sending a second conduction signal to the second switch circuit, so that the second switch circuit conducts connection between the battery module and the charge-discharge interface according to the second conduction signal.

5. The charge control method according to claim 4, characterized in that the method further comprises:

when the DC-DC conversion unit charges the battery module, current input sampling information and output sampling information of the DC-DC conversion unit are obtained;

and adjusting the target output voltage and/or carrying out parameter configuration on the DC-DC conversion unit according to the input sampling information and the output sampling information.

6. The charge control method according to claim 4, characterized in that the method further comprises:

when the DC-DC conversion unit charges the battery module, current charging demand information of the battery module is obtained;

based on a preset minimum pressure difference formula, adjusting the target output voltage according to the current charging demand information to obtain an adjusted target output voltage;

and controlling the DC-DC conversion unit to charge the battery module according to the regulated target output voltage.

7. The charge control method according to claim 4, characterized in that the method further comprises:

when the battery module finishes charging, the second switch circuit is controlled to be turned off;

Controlling the DC-DC conversion unit to enter a standby mode and controlling the first switching circuit to be turned off;

and controlling the power supply equipment to output a preset safety voltage or controlling the power supply equipment to enter a standby mode.

8. The charge control method according to any one of claims 1 to 7, characterized in that the method further comprises:

and if the disconnection between the power supply equipment and the charging and discharging interface is detected, controlling the energy storage equipment to enter a low-power consumption mode.

9. The charge control method according to any one of claims 1 to 7, wherein the energy storage device further comprises a battery management system; the method further comprises the steps of:

after the battery module is charged, if the power supply equipment is detected to be connected with the charging and discharging interface, acquiring battery state information of the battery module acquired by the battery management system;

and when the battery state information is that the voltage of the battery module is smaller than a preset voltage threshold or the electric quantity of the battery module is insufficient, executing charging operation.

10. The utility model provides a charge control method, is applied to the microcontroller in energy storage equipment, characterized in that, energy storage equipment still includes power supply controller, charge-discharge interface, DC-DC conversion unit and battery module, DC-DC conversion unit's first end with charge-discharge interface connects, DC-DC conversion unit's second end with battery module connects, power supply controller with charge-discharge interface connects, the method includes:

When the power supply equipment is detected to be connected to the charging and discharging interface, if the power supply equipment meets a preset power supply condition, acquiring power supply capacity information of the power supply equipment based on the power supply controller;

acquiring charging demand information of the battery module;

controlling the power supply equipment to output the target output voltage to the DC-DC conversion unit based on the power supply controller so that the DC-DC conversion unit charges the battery module according to the target output voltage;

In the method, in the process of the invention,indicating that the DC-DC conversion unit is at +.>A corresponding minimum pressure difference at maximum conversion efficiency; />Is any one of the output voltages of the power supply gears of the power supply adapter corresponding to the power supply equipment or the voltage in the output voltage range of the programmable power supply.

11. The charge control method according to claim 10, characterized in that the method further comprises:

12. The charge control method according to claim 10, wherein the controlling the power supply apparatus to output the target output voltage to the DC-DC conversion unit based on the power supply controller for the DC-DC conversion unit to charge the battery module according to the target output voltage includes:

instruct the power supply controller to request the power supply device to output the target output voltage;

instructing the power supply controller to set the working mode of the DC-DC conversion unit to a charging mode, and configuring parameters of the DC-DC conversion unit according to the target output voltage;

13. An energy storage device, the energy storage device comprising a memory and a processor;

the memory is used for storing a computer program;

the processor is configured to implement the charge control method according to any one of claims 1 to 9 or the charge control method according to any one of claims 10 to 12 when executing the computer program.

14. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program which, when executed by a processor, implements the charge control method according to any one of claims 1 to 9, or the charge control method according to any one of claims 10 to 12.