Master-slave cooperative capacity expansion method and device for mobile battery

Abstract

The present disclosure provides a method and device for expanding the capacity of a mobile battery by master-slave cooperation. The method includes the steps of: determining that the voltage of a connected external power supply device is within a predetermined voltage threshold range; determining that the external power supply device is a battery slave device when the voltage is greater than the master device voltage of a battery master device; conducting a discharge circuit between the battery slave device and the battery master device when the voltage difference between the voltage and the master device voltage is less than a predetermined voltage difference threshold; and controlling the discharge circuit to discharge to the battery master device according to a discharge current of the discharge circuit, a predetermined first current threshold, and a second current threshold. This can improve the safety of parallel power supply.

Description

[Technical field]

[0001] The present disclosure relates to the technical field of dynamic capacity expansion, and specifically to a master-slave cooperative capacity expansion method and device for a mobile battery.

[0002] CROSS REFERENCE TO RELATED APPLICATIONS This application claims priority based on a Chinese application filed with the State Intellectual Property Office of China on October 31, 2022, bearing application number 202211351174.3 and entitled "Method and device for master-slave collaborative capacity expansion of mobile battery," the entire contents of which are incorporated by reference into this application. [Background technology]

[0003] In the case of off-grid or power outages such as indoor backup power, outdoor activities, road trips by car, and emergency rescue, the power demand increases, and it is difficult for the capacity of a single portable mobile battery to meet the power demand. Currently, one solution is to prepare two portable mobile batteries of the same model number, one of which is a battery master device and the other is a battery slave device, and to improve the battery capacity by a collaborative capacity expansion method in which the battery master device and the battery slave device are connected in parallel. However, in this method of improving battery capacity, the battery master device and the battery slave device connected in parallel are prone to short circuit, overvoltage, over-discharge, etc. in the process of parallel power supply, so the safety of parallel power supply is relatively low and the power supply efficiency is not high. Summary of the Invention

[0004] In view of the above, the present disclosure aims to provide a master-slave cooperative capacity expansion method and apparatus for a mobile battery that improves the safety and power supply efficiency of parallel power supply.

[0005] In a first aspect, an embodiment of the present disclosure provides a master-slave cooperative capacity expansion method for a mobile battery, the master-slave cooperative capacity expansion method including: determining that a voltage of a connected external power supply device is within a predetermined voltage threshold range; determining that the external power supply device is a battery slave device when the voltage is greater than a master device voltage of a battery master device; conducting a discharge circuit between the battery slave device and the battery master device when a voltage difference between the voltage and the master device voltage is less than a predetermined voltage difference threshold; and controlling the discharge circuit to discharge from the battery slave device according to a discharge current of the discharge circuit, a first predetermined current threshold, and a second predetermined current threshold.

[0006] In a first aspect, an embodiment of the present disclosure provides a first possible embodiment of the first aspect, in which determining that the external power supply device is a battery slave device includes transmitting a predetermined command to the external power supply device, and determining that the external power supply device is a battery slave device based on a response of the external power supply device to the command.

[0007] In a first possible embodiment of the first aspect, an embodiment of the present disclosure provides a second possible embodiment of the first aspect, wherein determining that the external power supply device is a battery slave device based on a response of the external power supply device to the command includes: switching the power state to an external power supply connected state when there is no response to the command or the response does not match a predetermined response; and determining that the external power supply device is a battery slave device when the response matches a predetermined response, and a communication protocol is set in the battery master device and the battery slave device.

[0008] In a first aspect, the embodiment of the present disclosure provides a third possible embodiment of the first aspect, wherein the master-slave cooperation capacity expansion method further includes, when the master device voltage is equal to or greater than the voltage, reading the master device voltage and the battery slave device voltage according to a predetermined voltage reading period until the master device voltage is smaller than the voltage.

[0009] In a first aspect, the embodiment of the present disclosure provides a fourth possible embodiment of the first aspect. The step of controlling the discharge circuit to discharge from the battery slave device based on the discharge current of the discharge circuit, a predetermined first current threshold, and a second current threshold includes the steps of: when the discharge current is equal to or less than the first current threshold, disconnecting a discharge circuit of the battery master device for discharging from the battery slave device; when the discharge current is greater than the first current threshold and less than the second current threshold, discharging from the battery slave device via the discharge circuit, reading the discharge current according to a predetermined current reading cycle, and disconnecting the discharge circuit of the battery master device for discharging from the battery slave device when the discharge current is equal to or less than the first current threshold; and when the discharge current is equal to or more than the second current threshold, reading the discharge current according to a predetermined current reading cycle, and conducting the discharge circuit of the battery master device for discharging from the battery slave device when the discharge current is smaller than the second current threshold.

[0010] In the first aspect, any one of the first possible embodiment to the fourth possible embodiment of the first aspect, an embodiment of the present disclosure provides a fifth possible embodiment of the first aspect, in which the master-slave cooperative capacity expansion method further includes discharging the battery slave device when the voltage difference is equal to or greater than the voltage difference threshold, and reading the voltage of the battery slave device according to a predetermined voltage difference reading period until the voltage difference is smaller than the voltage difference threshold.

[0011] In the first aspect, any one of the first possible embodiment to the fourth possible embodiment of the first aspect, the embodiment of the present disclosure provides a sixth possible embodiment of the first aspect, wherein the master-slave cooperative capacity expansion method further includes switching a power state of a battery master device to a power abnormality state when the voltage is not within a predetermined voltage threshold range, and triggering a pre-installed overvoltage protection circuit when the voltage exceeds a voltage upper threshold of the voltage threshold range.

[0012] In a second aspect, the embodiment of the present disclosure further provides a master-slave cooperative capacity expansion device for a mobile battery, the master-slave cooperative capacity expansion device including a connection voltage detection module, a voltage determination module, a battery slave device detection module, a voltage difference acquisition module, and a discharge control module, the connection voltage detection module is configured to determine whether a voltage of a connected external power supply device is within a predetermined voltage threshold range, the voltage determination module is configured to determine whether the voltage is greater than a master device voltage of a battery master device, the battery slave device detection module is configured to determine whether the external power supply device is a battery slave device, the voltage difference acquisition module is configured to conduct a discharge circuit between the battery slave device and the battery master device when a voltage difference between the voltage and the master device voltage is less than a predetermined voltage difference threshold, and the discharge control module is configured to control the discharge circuit to discharge from the battery slave device according to a discharge current of the discharge circuit, a predetermined first current threshold, and a second current threshold.

[0013] In a third aspect, an embodiment of the present application provides a computing device, comprising: a memory; a processor; and a computer program stored in the memory and executable by the processor, the computer program being executed by the processor to perform the steps of the method described above.

[0014] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium having a computer program stored thereon, the computer program being executed by a processor to perform the steps of the above method.

[0015] The mobile battery master-slave cooperative capacity expansion method and device according to the embodiment of the present disclosure determines whether the voltage of the connected external power supply device is within a predetermined voltage threshold range, and if the voltage is greater than the master device voltage of the battery master device, determines that the external power supply device is a battery slave device, and if the voltage difference between the voltage and the master device voltage is less than a predetermined voltage difference threshold, conducts the discharge circuit between the battery slave device and the battery master device, and controls the discharge circuit to discharge from the battery slave device according to the discharge current of the discharge circuit, a predetermined first current threshold and a second current threshold. In this way, it is possible to accurately identify whether the connected external power supply device is a battery slave device or a discharger, and realize the conduction and cut-off of the battery slave device through voltage detection and current detection, and prevent short circuit, overvoltage, over-discharge, etc. in the process of parallel power supply, and effectively improve the safety and power supply efficiency of parallel power supply.

[0016] In order to make the above objects, features and advantages of the present disclosure more clear, preferred embodiments of the present disclosure will be described in detail below with reference to the drawings.

[0017] In order to more clearly describe the technical solutions of the embodiments of the present disclosure, the drawings necessary for describing the embodiments are briefly described below. It should be noted that the drawings described are only for illustrating some embodiments of the present disclosure and are not intended to limit the scope. Those skilled in the art can obtain other related drawings based on these drawings without using inventive abilities. [Brief description of the drawings]

[0018] [Figure 1]1 is a schematic flowchart of a master-slave cooperative capacity expansion method for a mobile battery according to an embodiment of the present disclosure; [Diagram 2] A schematic configuration diagram of a master-slave collaborative capacity expansion device for a mobile battery according to an embodiment of the present disclosure. [Diagram 3] 3 is a schematic block diagram of a computing device 300 according to an embodiment of the present application. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] In order to make the objectives, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions in the embodiments of the present disclosure will be described clearly and completely below with reference to the drawings used in the embodiments of the present disclosure. The described embodiments are only some of the embodiments of the present disclosure, and are not all of the embodiments. The components in the embodiments of the present disclosure shown in the drawings can be arranged and designed in various arrangement methods. Therefore, the following detailed description of the embodiments of the present disclosure shown in the drawings is only a selected embodiment of the present disclosure, and does not limit the scope of the present disclosure to be protected. All other embodiments obtained by a person skilled in the art based on the embodiments of the present disclosure without using inventive ability also belong to the protection scope of the present disclosure.

[0020] In an embodiment of the present disclosure, a battery management system (BMS) is built into the battery slave device, and the battery management system has protection functions against overheating, over-discharge, overcurrent, short circuit, etc., so that the battery slave device can provide capacity expansion for the battery master device and can communicate with the battery master device via the built-in BMS of the battery slave device, and the battery master device can obtain the type of the connected power source. After confirming that the connected power source is a battery slave device, the battery master device can control the timing of conduction and cut-off of the battery slave device, thereby ensuring the electrical safety of the battery master device and improving the safety and power supply efficiency of parallel power supply.

[0021] In the embodiments of the present disclosure, by identifying the battery slave device with respect to the connected external power supply device, not only can the safety of use of the battery slave device and the battery master device be improved, but the reliability of battery capacity expansion can also be improved, and the safety of parallel power supply can be effectively improved, thereby effectively extending the service life of the battery master device.

[0022] The embodiments of the present disclosure provide a master-slave cooperative capacity expansion method and device for a mobile battery, which will be described below with reference to the embodiments.

[0023] 1 is a schematic flow chart of a master-slave cooperation capacity expansion method for a mobile battery according to an embodiment of the present disclosure. As shown in FIG. 1, the master-slave cooperation capacity expansion method is applied to a battery master device and includes the following steps:

[0024] Step 101: Determine whether the voltage of the connected external power supply is within a predetermined voltage threshold range.

[0025] In the embodiment of the present disclosure, when an external power supply device, such as an external power supply (discharger, adapter other than a standard adapter) or a battery slave device is connected to the battery master device, in order to ensure the operation safety of the battery master device, the battery master device judges whether the voltage range of the connected external power supply device is within the withstand voltage range. Therefore, when detecting the connection of an external power supply device, the battery master device obtains the voltage of the connected external power supply device and judges whether the voltage of the connected external power supply device is within a predetermined voltage threshold range to determine whether to perform capacity expansion.

[0026] In the embodiment of the present disclosure, as an optional embodiment, the voltage threshold range is 9V to 18V. If the voltage of the connected external power supply device is within 9V to 18V, it is determined that the voltage range of the connected external power supply device meets the requirement, so that the battery master device can be effectively protected.

[0027] In the embodiment of the present disclosure, as an optional embodiment, after determining that the voltage is within a predetermined voltage threshold range, it is necessary to further determine whether the external power supply device is a battery slave device or a non-battery slave device, and only if it is a battery slave device, the method according to the embodiment of the present disclosure is adopted, and therefore the method further includes switching the power state of the battery master device to an external power supply undetermined state.

[0028] In the embodiment of the present disclosure, as a selectable example, the power supply state includes, but is not limited to, a master-slave state, an idle state, an external power supply connection state, an external power supply device undetermined state, and a power supply abnormality state.

[0029] In another optional embodiment of the present disclosure, the method further includes switching a power state of the battery master device to a power abnormality state when the voltage is not within a predetermined voltage threshold range, and triggering a pre-installed overvoltage protection circuit when the voltage exceeds an upper voltage threshold of the voltage threshold range.

[0030] In the embodiment of the present disclosure, if the voltage is not within the predetermined voltage threshold range, it will enter a power abnormality state. If the voltage exceeds the upper voltage threshold of the voltage threshold range, it will trigger over-voltage protection, so as to effectively protect the battery master device. If the voltage is lower than the lower voltage threshold of the voltage threshold range, for example, less than 9V, it will not perform any action after switching the power state of the battery master device to a power abnormality state, i.e., no protection or discharge indication will be made.

[0031] Step 102: If the voltage is greater than the master device voltage of the battery master device, determine that the external power device is a battery slave device.

[0032] In an embodiment of the present disclosure, a master device voltage of a battery master device is obtained, and if the master device voltage of the battery master device is equal to or greater than the voltage of the battery slave device, the battery slave device cannot discharge to the battery master device. As an optional embodiment, determining that the voltage is greater than the master device voltage of the battery master device includes, if the master device voltage is equal to or greater than the voltage, reading the master device voltage and the battery slave device voltage according to a predetermined voltage reading period until the master device voltage is less than the voltage.

[0033] In the embodiment of the present disclosure, when the voltage of the battery master device is relatively high, the voltage will gradually decrease during the process of supplying power to the outside, so the voltage is detected according to the voltage reading period. As an optional embodiment, the voltage reading period (time interval) can be set according to actual needs, such as 3 minutes, 5 minutes, etc.

[0034] In an embodiment of the present disclosure, as one selectable embodiment, the step of determining that the external power supply device is a battery slave device includes a step of sending a predetermined command to the external power supply device and determining that the external power supply device is a battery slave device based on a response of the external power supply device to the command.

[0035] In the embodiment of the present disclosure, after determining that the voltage of the connected external power supply meets the requirement, it is necessary to determine whether the connected external power supply is a battery slave device. If the external power supply is a battery slave device, the method according to the embodiment of the present disclosure is adopted; if the external power supply is not a battery slave device, such as a discharger, the contents described in the embodiment of the present disclosure do not apply. As an optional embodiment, the battery master device sends a command through a pin whose interface is capable of RS485 communication.

[0036] In an embodiment of the present disclosure, as one selectable embodiment, the step of determining that the external power supply device is a battery slave device based on the response of the external power supply device to the command includes a step of a battery master device sending a command to the external power supply device, and if there is no response to the command or the response does not match a predetermined response, switching the power state to an external power source connected state, and if the response matches the predetermined response, determining that the external power supply device is a battery slave device, wherein a communication protocol is set in the battery master device and the battery slave device.

[0037] In an embodiment of the present disclosure, a protocol and a communication mechanism for the batteries to communicate with each other are preset in the batteries, so that when an external power supply device connected to a battery master device is a battery slave device, the battery slave device can accurately respond to a received command.

[0038] In an embodiment of the present disclosure, after it is determined that the connected external power supply device is a battery slave device, the power supply state is switched from an external power supply undetermined state to a master-slave state.

[0039] Step 103: When the voltage difference between the voltage and the master device voltage is smaller than a predetermined voltage difference threshold, the discharge circuits of the battery slave device and the battery master device are made conductive.

[0040] In an embodiment of the present disclosure, when the voltage difference is less than the voltage difference threshold, the discharge circuit of the battery master device is turned on to discharge the battery slave device.

[0041] In an embodiment of the present disclosure, as an optional embodiment, the method further includes discharging the battery slave device if the voltage difference is equal to or greater than the voltage difference threshold, and reading the voltage of the battery slave device according to a predetermined voltage difference reading period until the voltage difference is smaller than the voltage difference threshold.

[0042] In an embodiment of the present disclosure, when the voltage difference is equal to or greater than the voltage difference threshold, the discharge circuit of the battery master device for discharging from the battery slave device is in a cut-off state.

[0043] Step 104: Control the discharge circuit to discharge from the battery slave device according to a discharge current of the discharge circuit, a first predetermined current threshold and a second predetermined current threshold.

[0044] In an embodiment of the present disclosure, a discharge current of the discharge circuit is acquired. As an optional embodiment, the step of controlling the discharge circuit to discharge from the battery slave device based on the discharge current, a first predetermined current threshold, and a second predetermined current threshold includes:

[0045] if the discharge current is equal to or less than the first current threshold, interrupting a discharge circuit of the battery master device for discharging from the battery slave device;

[0046] discharging the battery slave device through the discharge circuit when the discharge current is greater than the first current threshold and less than the second current threshold, reading the discharge current according to a predetermined current reading cycle, and cutting off a discharge circuit of the battery master device for discharging the battery slave device when the discharge current becomes equal to or less than the first current threshold;

[0047] When the discharge current is equal to or greater than the second current threshold, reading the discharge current according to a predetermined current reading period, and when the discharge current becomes smaller than the second current threshold, conducting a discharge circuit of the battery master device for discharging from the battery slave device.

[0048] In an embodiment of the present disclosure, after the discharge circuit of the battery master device for discharging from the battery slave device is turned on, the discharge current is detected, and if the discharge current is equal to or greater than the second current threshold, the discharge circuit of the battery master device for discharging from the battery slave device is cut off, and after a predetermined current reading period has elapsed, the discharge circuit of the battery master device for discharging from the battery slave device is turned on, and the discharge current is further read, and this process is repeated until the discharge current becomes smaller than the second current threshold, thereby realizing normal discharging of the battery slave device. Alternatively, when the number of times that the discharge circuit of the battery master device for discharging from the battery slave device is turned on reaches a predetermined number, for example, five times, and the discharge current is still equal to or greater than the second current threshold, the discharge circuit of the battery master device for discharging from the battery slave device is cut off, and the power state of the master device is switched to a power abnormality state.

[0049] In an embodiment of the present disclosure, one selectable example is a voltage difference threshold of 0.3 volts, a voltage difference reading period of 30 seconds, a current reading period of 30 seconds, a first current threshold of 0.5 amps, and a second current threshold of 50 amps.

[0050] In an embodiment of the present disclosure, the battery master device and the battery slave device are connected by a cascade line, the battery master device is located in the battery slave device, and after the cascade connection, the power supply state of the battery master device becomes a master-slave state.

[0051] A specific example will be described below.

[0052] In the embodiment of the present disclosure, when the voltage of the battery master device is greater than the voltage of the connected battery slave device, the battery master device will send a command through the pin whose interface is RS485 communication enabled, and if there is no response or the response is incorrect, it will enter the external power connection state. If the response is correct, it will enter the master-slave state, and the battery master device will read the battery slave device voltage every 30 seconds until the master device voltage is less than the battery slave device voltage.

[0053] If the battery master device voltage is less than the voltage of the connected power source, the battery master device will send a command through the pin whose interface is RS485 communication enabled, and if there is no response or the response is incorrect, it will enter the external power connection state. If the response is correct, it will enter the master-slave state, determine the voltage difference between the battery master device and the battery slave device, and if the battery slave device voltage is greater than the battery master device voltage and the voltage difference is greater than 0.3V, the battery master device will turn on the front-end MOS, discharge the battery slave device, turn off the charging MOS, and read the battery slave device voltage every 30 seconds until the voltage difference is less than 0.3V.

[0054] When the battery slave device voltage is greater than the master device voltage and the voltage difference is less than 0.3V, the battery master device turns on the charging MOS and discharging MOS, and at this time, the battery master device judges the discharging current. If the discharging current is less than 0.5A, the battery slave device cannot perform the power replenishment function, and the battery master device controls the battery slave device to cut off the front-end MOS. If the charging current is greater than 0.5A and the current is less than 50A, the charging MOS is turned on and the current is checked every 30 seconds until it is less than 0.5A. If the current is greater than 50A, the battery master device turns on the timer, and after 15s, if the current is less than 50A, the battery master device turns on the charging MOS, and if the current is greater than 50A, the power state of the battery master device is switched to the power abnormal state.

[0055] In the embodiment of the present disclosure, each time an external power supply device is connected, a command is sent through the communication interface at the pin of the battery master device, thereby accurately identifying whether the connected external power supply device is a battery slave device or a charger, and the conduction and cut-off of the battery slave device is realized through voltage detection and current detection, ensuring the safety of the cascade connection, preventing short circuit, overvoltage, or over-discharge during the parallel power supply process, effectively improving the safety of parallel power supply, and ensuring power supply efficiency. Furthermore, in the embodiment of the present disclosure, the battery slave device can be used alone and is equipped with an alarm and protection system, which makes it safer and broadens the application range of the battery slave device.

[0056] 2 is a schematic diagram of a master-slave cooperative capacity expansion device for a mobile battery according to an embodiment of the present disclosure. As shown in FIG. 2, the device includes a connection voltage detection module 201, a voltage judgment module 202, a battery slave device detection module 203, a voltage difference acquisition module 204, and a discharge control module 205.

[0057] The connection voltage detection module 201 is configured to determine whether the voltage of the connected external power supply is within a predetermined voltage threshold range.

[0058] In an embodiment of the present disclosure, the connection voltage detection module 201 obtains the voltage of the connected external power supply device when detecting the connection of the external power supply device. As an optional embodiment, the connection voltage detection module 201 is further configured to switch the power state of the battery master device to a power abnormality state when the voltage is not within a predetermined voltage threshold range, and trigger a pre-installed overvoltage protection circuit when the voltage exceeds a voltage upper threshold of the voltage threshold range.

[0059] If the voltage determination module 202 determines that the voltage is greater than the master device voltage of the battery master device, it is configured to notify the battery slave device detection module 203 .

[0060] In an embodiment of the present disclosure, the voltage determination module 202 is configured to obtain a master device voltage of a battery master device and determine that the voltage is greater than the master device voltage. As an optional embodiment, the voltage determination module 202 is specifically configured to read the master device voltage and the voltage of the battery slave device according to a predetermined voltage reading period when the master device voltage is greater than or equal to the voltage, until the master device voltage is less than the voltage.

[0061] The battery slave device detection module 203 is configured to determine that the external power device is a battery slave device.

[0062] In an embodiment of the present disclosure, the battery slave device detection module 203 is configured to send a predetermined command to an external power supply device, and determine that the external power supply device is a battery slave device based on a response of the external power supply device to the command.

[0063] As an optional embodiment, the battery slave device detection module 203 includes a command sending unit (not shown) configured for the battery master device to send a command to the external power device, a first matching unit configured for switching the power state to an external power connection state if there is no response to the command or the response does not match a predetermined response, and a second matching unit configured for determining that the external power device is a battery slave device if the response matches the predetermined response, and a communication protocol is set for the battery master device and the battery slave device.

[0064] The voltage difference acquisition module 204 is configured to conduct the discharge circuits of the battery slave device and the battery master device when the voltage difference between the voltage and the master device voltage is less than a predetermined voltage difference threshold.

[0065] In an embodiment of the present disclosure, the voltage difference acquisition module 204 calculates a voltage difference between the voltage and the master device voltage. As an optional embodiment, the voltage difference acquisition module 204 is further configured to discharge the battery slave device when the voltage difference is equal to or greater than the voltage difference threshold, and read the voltage of the battery slave device according to a predetermined voltage difference reading period until the voltage difference is smaller than the voltage difference threshold.

[0066] The discharge control module 205 is configured to control the discharge circuit to discharge from the battery slave device based on a discharge current of the discharge circuit, a first predetermined current threshold and a second predetermined current threshold.

[0067] In an embodiment of the present disclosure, the discharge control module 205 obtains a discharge current of the discharge circuit, and controls the discharge circuit to discharge from the battery slave device based on the discharge current, the first current threshold, and the second current threshold. As a selectable embodiment, the voltage difference threshold is 0.3 volts, the voltage difference reading period is 30 seconds, the current reading period is 30 seconds, the first current threshold is 0.5 amperes, and the second current threshold is 50 amperes.

[0068] In an embodiment of the present disclosure, as an optional embodiment, the discharge control module 205 is

[0069] a first threshold determination unit (not shown) configured to cut off a discharge circuit of the battery master device for discharging from the battery slave device when the discharge current is equal to or less than the first current threshold;

[0070] a second threshold judgment unit configured to discharge the battery slave device through the discharge circuit when the discharge current is greater than the first current threshold and less than the second current threshold, read the discharge current according to a predetermined current reading period, and cut off the discharge circuit of the battery master device for discharging the battery slave device when the discharge current is equal to or less than the first current threshold;

[0071] and a third threshold judgment unit configured to read the discharge current according to a predetermined current reading period when the discharge current is equal to or greater than the second current threshold, and to conduct a discharge circuit of the battery master device for discharging from the battery slave device when the discharge current becomes smaller than the second current threshold.

[0072] As shown in Fig. 3, an embodiment of the present application provides a computer device 300 for performing the master-slave cooperation capacity expansion method for a mobile battery shown in Fig. 1. The device includes a memory 301, a processor 302 connected to the memory 301 via a bus, and a computer program stored in the memory 301 and executable by the processor 302. When the processor 302 executes the computer program, steps of the master-slave cooperation capacity expansion method for a mobile battery are performed.

[0073] Specifically, the above-mentioned memory 301 and processor 302 may be general-purpose memory and processor, and are not specifically limited herein. When the processor 302 executes the computer program stored in the memory 301, the above-mentioned master-slave cooperative capacity expansion method for the mobile battery is implemented.

[0074] Corresponding to the master-slave cooperative capacity expansion method of a mobile battery shown in FIG. 1, an embodiment of the present application further provides a computer-readable storage medium, in which a computer program is stored, and when the computer program is executed by a processor, the steps of the above-mentioned master-slave cooperative capacity expansion method of a mobile battery are executed.

[0075] Specifically, the storage medium may be a general-purpose storage medium such as a portable magnetic disk, a hard disk, etc. When the computer program in the storage medium is executed, the above-mentioned master-slave cooperative capacity expansion method for a mobile battery is executed.

[0076] In the embodiments of the present application, the described system and method can be realized in other ways. The above-described system embodiments are merely illustrative. For example, the division of the units is merely a logical functional division, and other division methods may be used in actual implementation. In addition, multiple units or components may be combined or integrated into another system, or some features may be omitted or not implemented. In addition, the shown or discussed mutual couplings or direct couplings or communication connections may be indirect couplings or communication connections through communication interfaces, systems or units, and may be electrical connections, mechanical connections or other types of connections.

[0077] The units described as separate parts may or may not be physically separate. The components shown as units may or may not be physical units, i.e., they may be located in the same location or distributed among multiple units. Some or all of the units can be selected according to actual requirements to achieve the purpose of the scheme of the present embodiment.

[0078] Furthermore, each functional unit in the embodiments of the present application may be integrated into a single processing unit, may function as an independent physical entity, or two or more units may be integrated into a single unit.

[0079] When the function is realized in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. From this understanding, the technical solution of the present application itself, or a part that can contribute to the prior art, or a part of the technical solution can be realized in the form of a software product. The computer software product is stored in one storage medium and includes a number of commands for executing all or part of the steps of the above-mentioned method in each embodiment of the present application by a computer device (such as a personal computer, a server, or a network device). The above-mentioned storage medium includes various media that can store program code, such as a USB disk, a portable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0080] Since like reference numerals refer to like objects in the drawings, when a definition is made in one drawing, it is unnecessary to further define or interpret it in the other drawings. In addition, the terms "first," "second," "third," etc. are used only for distinguishing and explaining purposes, and do not express or imply any relative importance.

[0081] The above examples are merely specific embodiments for explaining the technical solution of the present application, and do not limit the present application, so the scope of protection of the present application is not limited thereto. Although the above examples are used to describe the present application in detail, those skilled in the art may make improvements or modifications to the technical solutions described in the above examples within the technical scope of the present application, or may make equivalent substitutions for some of the technical features therein. These improvements, modifications or substitutions do not deviate the essence of the technical solution from the spirit and scope of the technical solution of the examples of the present application, and all of them belong to the scope of protection of the present application. Therefore, the scope of protection of the present application is subject to the scope of the claims.

Claims

1. determining that the voltage of a connected external power supply is within a predetermined voltage threshold range; determining that the external power device is a battery slave device if the voltage is greater than a master device voltage of a battery master device; conducting a discharge circuit between the battery slave device and the battery master device when a voltage difference between the voltage and the master device voltage is less than a predetermined voltage difference threshold; and controlling the discharge circuit to discharge from the battery slave device based on a discharge current of the discharge circuit, a first predetermined current threshold, and a second predetermined current threshold. A master-slave cooperative capacity expansion method for a mobile battery, comprising:

2. The step of determining that the external power supply device is a battery slave device includes: transmitting a predetermined command to the external power supply device, and determining that the external power supply device is a battery slave device based on a response of the external power supply device to the command. The master-slave cooperative capacity expansion method according to claim 1 .

3. determining that the external power supply device is a battery slave device based on a response of the external power supply device to the command, if there is no response to the command or the response does not match a predefined response, switching the power state of the battery master device to an external power source connected state; if the response matches a predetermined response, determining that the external power supply device is a battery slave device; A communication protocol is set in the battery master device and the battery slave device. The master-slave cooperative capacity expansion method according to claim 2 .

4. If the master device voltage is equal to or greater than the voltage, the method further includes the step of reading the master device voltage and the battery slave device voltage according to a predetermined voltage reading period until the master device voltage is less than the voltage. The master-slave cooperative capacity expansion method according to claim 1 .

5. controlling the discharge circuit to discharge from the battery slave device based on a discharge current of the discharge circuit, a first predetermined current threshold, and a second predetermined current threshold, if the discharge current is equal to or less than the first current threshold, interrupting a discharge circuit of the battery master device for discharging from the battery slave device; when the discharge current is greater than the first current threshold and less than the second current threshold, discharging from the battery slave device via the discharge circuit, reading the discharge current according to a predetermined current reading cycle, and when the discharge current becomes equal to or less than the first current threshold, cutting off a discharge circuit of the battery master device for discharging from the battery slave device; When the discharge current is equal to or greater than the second current threshold, reading the discharge current according to a predetermined current reading cycle, and when the discharge current becomes smaller than the second current threshold, conducting a discharge circuit of the battery master device for discharging from the battery slave device. The master-slave cooperative capacity expansion method according to claim 1 .

6. If the voltage difference is equal to or greater than the voltage difference threshold, discharging the battery slave device and reading the voltage of the battery slave device according to a predetermined voltage difference reading period until the voltage difference becomes smaller than the voltage difference threshold.

6. The master-slave cooperative capacity expansion method according to claim 1,

7. If the voltage is not within the predetermined voltage threshold range, switching the power state of the battery master device to a power abnormal state, and triggering a pre-installed overvoltage protection circuit when the voltage exceeds an upper voltage threshold of the voltage threshold range.

6. The master-slave cooperative capacity expansion method according to claim 1,

8. The battery slave device detection module includes a connection voltage detection module, a voltage determination module, a battery slave device detection module, a voltage difference acquisition module, and a discharge control module. The connection voltage detection module is configured to determine whether a voltage of a connected external power supply device is within a predetermined voltage threshold range; The voltage determination module is configured to notify a battery slave device detection module when determining that the voltage is greater than a master device voltage of a battery master device; The battery slave device detection module is configured to determine that the external power supply device is a battery slave device; the voltage difference acquisition module is configured to conduct a discharge circuit between the battery slave device and the battery master device when a voltage difference between the voltage and the master device voltage is smaller than a predetermined voltage difference threshold; The discharge control module is configured to control the discharge circuit to discharge from the battery slave device based on a discharge current of the discharge circuit, a first predetermined current threshold, and a second predetermined current threshold. A master-slave collaborative capacity expansion device for a mobile battery.

9. 1. A computing device comprising: A processor, a memory, and a bus, The memory stores machine-readable commands executable by the processor, and when the computer device is operated, the processor and the memory communicate via a bus. When the machine-readable commands are executed by the processor, the steps of the master-slave cooperative capacity expansion method for a mobile battery according to any one of claims 1 to 5 are performed. A computing device comprising:

10. 1. A computer-readable storage medium, comprising: A computer program is stored in the memory. When the computer program is executed by a processor, the steps of the master-slave cooperative capacity expansion method for a mobile battery according to any one of claims 1 to 5 are executed. A computer-readable storage medium comprising:

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