CN113612281A

CN113612281A - Power supply system and power supply method

Info

Publication number: CN113612281A
Application number: CN202110896921.0A
Authority: CN
Inventors: 张占军; 李斌; 樊红杰; 吴晓彤; 方坤; 程涛
Original assignee: Liaoning Ruihua Industrial Group High And New Technology Co ltd
Current assignee: Liaoning Ruihua Industrial Group High And New Technology Co ltd
Priority date: 2021-08-05
Filing date: 2021-08-05
Publication date: 2021-11-05

Abstract

The present disclosure relates to a power supply system and a power supply method. The power supply system comprises a main battery unit and at least one slave battery unit, and the slave controller of the slave battery unit transmits battery information of the slave battery unit to the main controller of the main battery unit. The main controller determines the residual electric quantity of each battery unit according to the battery information of the main battery unit and the battery information of the slave battery units, determines a target discharge unit meeting a discharge condition according to the residual electric quantity of each battery unit and the current discharge stage when the determination system is in a discharge mode, and generates a discharge control instruction corresponding to the target discharge unit; or when the system is determined to be in the charging mode, determining a target charging unit meeting the charging condition according to the residual capacity and the current charging stage of each battery unit, and generating a charging control instruction corresponding to the target charging unit. And each battery unit in the orderly-controlled power supply system supplies power to a load or charges each battery unit, so that the power supply time requirements of different production systems are met.

Description

Power supply system and power supply method

Technical Field

The present disclosure relates to the field of electronic circuit technologies, and in particular, to a power supply system and a power supply method.

Background

In order to prevent the situations of instability, power failure and the like of an external power supply under a mine, a mine battery needs to be arranged for production equipment under the mine, so that power is supplied to a load through the mine battery in time when the external power supply is unstable, power failure and the like. Because the mining battery needs to be subjected to explosion-proof authentication, corresponding parameters cannot be changed at will after the explosion-proof authentication is completed, and in addition, the manufacturing of the mining battery with larger capacity is difficult, and the danger coefficient is higher, so that the mining battery used in the related technology is a fixed mining battery with small capacity, and the working time of the mining battery in the related technology also needs to be fixed. Considering that different production systems in a mine have different working times, for example, a coal mine gas monitoring system requires that the working time of equipment is not less than 4 hours, and a coal mine personnel management system requires that the working time of equipment is not less than 2 hours, how to provide a power supply system meeting the power supply duration requirements of different production systems is a technical problem to be solved urgently in the technical field.

Disclosure of Invention

In view of this, the present disclosure provides a power supply system and a power supply method.

According to an aspect of the present disclosure, there is provided a power supply system including a plurality of battery units including a master battery unit and at least one slave battery unit, the master battery unit including a master controller, the slave battery unit including a slave controller,

the slave controller is used for sending the received battery information of the slave battery unit to the master controller;

the main controller is used for determining the residual capacity of each battery unit according to the received battery information of the main battery unit and the battery information of the slave battery units;

the main controller is further configured to determine, when it is determined that the system is in a discharging mode, a target discharging unit meeting a discharging condition from the plurality of battery units according to the remaining capacity and the current discharging stage of each battery unit, and generate a discharging control instruction corresponding to the target discharging unit, so that the controller of the target discharging unit supplies power to a load according to the discharging control instruction; or

And when the system is determined to be in a charging mode, according to the residual capacity and the current charging stage of each battery unit, determining a target charging unit meeting charging conditions from the plurality of battery units, and generating a charging control instruction corresponding to the target charging unit, so that a controller of the target charging unit executes an operation of charging the target charging unit according to the charging control instruction.

In a possible implementation manner, the discharging phase includes a first phase and a second phase, and a target discharging unit meeting a discharging condition is determined from the plurality of battery units according to the remaining capacity of each battery unit and the current discharging phase, including any one of the following operations:

determining one of the battery units corresponding to the maximum remaining capacity of the remaining capacities of each battery unit as the target discharge unit when the current discharge stage is the first stage;

determining one of the slave battery units needing to be discharged as the target discharge unit when the current discharge stage is the second stage and the residual electric quantity of the at least one slave battery unit is inconsistent or the residual electric quantity of each battery unit is consistent;

and determining the main battery unit as the target discharge unit when the current discharge stage is the second stage, the remaining capacity of the at least one slave battery unit is consistent, and the remaining capacity of the slave battery unit is inconsistent with the remaining capacity of the main battery unit.

In a possible implementation manner, the discharge control instruction includes a discharge electric quantity required to be discharged by the target discharge unit and/or a target remaining electric quantity after discharge is completed.

In a possible implementation manner, the charging phase includes a third phase and a fourth phase, and a target charging unit satisfying a charging condition is determined from the plurality of battery units according to the remaining capacity of each battery unit and the current charging phase, including any one of the following operations:

determining one of the battery units corresponding to the minimum remaining capacity of the remaining capacities of each battery unit as the target charging unit when the current charging stage is the third stage;

determining the main battery unit as the target charging unit when the current charging stage is the fourth stage and the residual electric quantity of each battery unit is consistent;

and determining one of the slave battery units requiring charging as the target charging unit when the current charging stage is the fourth stage, the remaining capacity of the slave battery unit is not consistent with the remaining capacity of the master battery unit, and the remaining capacity of the at least one slave battery unit is not consistent.

In a possible implementation manner, the charging control instruction includes a charging amount required to be charged by the target charging unit and/or a target remaining amount after charging is completed.

In a possible implementation manner, the main controller is further configured to perform load detection and external power supply detection, and determine a working mode of the system according to a detection result, where the working mode includes the discharging mode, the charging mode, and an external power supply mode;

the working mode of the system is determined according to the detection result, and the working mode comprises any one of the following modes:

determining that the system is in the discharging mode if the detection result is that the load is detected and no external power supply is detected;

determining that the system is in a charging mode to enable the external power supply to charge the target charging unit when the detection result is that the load is not detected and the external power supply is detected;

and under the condition that the detection result is that the load is detected and the external power supply is detected, determining that the system is in the external power supply mode so that the external power supply supplies power for the load and charges the target charging unit.

In a possible implementation manner, the main controller is further configured to, in a case that it is determined that the system is in a discharging mode and the detection result is that the external power supply is detected, determine that the system is in the external power supply mode, and generate a discharging stop control instruction corresponding to the target discharging unit, so that the controller of the target discharging unit controls the target discharging unit to stop discharging according to the discharging stop control instruction.

In one possible implementation manner, the main battery unit further includes a main polarity protection circuit, a main charging switch, a main discharging switch, a main battery pack, and a main charging/discharging protection circuit;

the main polarity protection circuit comprises a main first diode and a main second diode, wherein the anode of the main first diode is connected to the main discharging switch, the cathode of the main second diode is connected to the main charging switch, and the cathode of the main first diode and the anode of the main second diode are connected to the external power supply and/or the load;

the main discharge switch is also connected to the main charge-discharge protection circuit and the main controller;

the main charging switch is also connected to the main charging and discharging protection circuit and the main controller;

the main charging and discharging protection circuit is also connected to the main controller and the first end of the main battery pack, the second end of the main battery pack is connected to the external power supply and/or the load, and the main charging and discharging protection circuit is used for collecting the battery information of the main battery pack in real time and sending the battery information of the main battery pack to the main controller as the battery information of the main battery unit;

the slave battery unit also comprises a slave polarity protection circuit, a slave charging switch, a slave discharging switch, a slave battery pack and a slave charging and discharging protection circuit;

the slave polarity protection circuit comprises a slave first diode and a slave second diode, wherein the anode of the slave first diode is connected to the slave discharging switch, the cathode of the slave second diode is connected to the slave charging switch, and the cathode of the slave first diode and the anode of the slave second diode are connected to the external power supply and/or the load;

the slave discharge switch is also connected to the slave charge and discharge protection circuit and the slave controller;

the slave charging switch is also connected to the slave charging and discharging protection circuit and the slave controller;

the slave charging and discharging protection circuit is further connected to the slave controller and the first end of the slave battery pack, the second end of the slave battery pack is connected to the external power supply and/or the load, and the slave charging and discharging protection circuit is used for collecting battery information of the slave battery pack in real time and sending the battery information of the slave battery pack to the slave controller as the battery information of the slave battery unit;

the master controller is connected to the slave controller.

In one possible implementation manner, the controller of the target discharge unit is further configured to stop receiving the discharge control instruction from the main controller in a case where it is determined that the remaining capacity of the target discharge unit is smaller than the first threshold value according to the received battery information of the target discharge unit.

In one possible implementation manner, the controller in each battery unit is used for determining the battery unit as the main controller under the condition that the controller per se meets the setting condition of the main controller;

wherein, the main controller setting condition comprises any one of the following conditions:

detecting that a dial switch on a controller is opened;

the received identification is consistent with the preset identification.

According to another aspect of the present disclosure, there is provided a power supply method applied to a master controller in the power supply system, where the power supply system includes a plurality of battery units, the plurality of battery units includes a master battery unit and at least one slave battery unit, the master battery unit includes the master controller, and the method includes:

determining the residual capacity of each battery unit according to the received battery information of the main battery unit and the battery information of the slave battery unit;

when the system is determined to be in a discharging mode, according to the residual capacity and the current discharging stage of each battery unit, determining a target discharging unit meeting a discharging condition from the plurality of battery units, and generating a discharging control instruction corresponding to the target discharging unit, so that a controller of the target discharging unit supplies power to a load according to the discharging control instruction; or, when the system is determined to be in a charging mode, according to the remaining capacity and the current charging stage of each battery unit, determining a target charging unit meeting a charging condition from the plurality of battery units, and generating a charging control instruction corresponding to the target charging unit, so that a controller of the target charging unit executes an operation of charging the target charging unit according to the charging control instruction.

According to the power supply system, the battery information of each battery unit is sent to the main controller, so that the main controller determines the target discharging unit or the target charging unit of the power supply system in different working modes, each battery unit in the power supply system can be controlled in order to supply power to a load, or each battery unit in the power supply system is charged, stable power supply voltage is guaranteed to be provided for the load, and meanwhile each battery unit in the power supply system can be protected. Moreover, the number of the battery units in the power supply system can be set according to practical application scenes, so that the power supply system can meet the power supply time length requirements of different production systems, and the power supply system accords with the ideas of intelligent mines and safe production.

Other features and aspects of the present disclosure will become apparent from the following detailed description of exemplary embodiments, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate exemplary embodiments, features, and aspects of the disclosure and, together with the description, serve to explain the principles of the disclosure.

Fig. 1 shows a schematic structural diagram of a power supply system provided according to an embodiment of the present disclosure.

Fig. 2 shows a schematic structural diagram of another power supply system provided according to an embodiment of the present disclosure.

Fig. 3 shows a schematic structural diagram of another power supply system provided according to an embodiment of the present disclosure.

Fig. 4 shows a flow chart of a power supply method provided according to an embodiment of the present disclosure.

Detailed Description

Various exemplary embodiments, features and aspects of the present disclosure will be described in detail below with reference to the accompanying drawings. In the drawings, like reference numbers can indicate functionally identical or similar elements. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.

The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments.

Furthermore, in the following detailed description, numerous specific details are set forth in order to provide a better understanding of the present disclosure. It will be understood by those skilled in the art that the present disclosure may be practiced without some of these specific details. In some instances, methods, means, elements and circuits that are well known to those skilled in the art have not been described in detail so as not to obscure the present disclosure.

Fig. 1 shows a schematic structural diagram of a power supply system provided according to an embodiment of the present disclosure. As shown in fig. 1, the power supply system 10 includes a plurality of battery units including a master battery unit 1 and at least one slave battery unit 2, the master battery unit 1 including a master controller 1', and the slave battery unit 2 including a slave controller 1 ″. The number of the battery units may be set by a person skilled in the art according to the power supply time period required by the load 20, and the longer the power supply time period is, the larger the number of the battery units is, which is not limited by the present disclosure.

The slave controller 1 ″ for transmitting the received battery information of the slave battery unit 2 to the master controller 1'.

The master controller 1' is configured to determine the remaining capacity of each of the battery units according to the received battery information of the master battery unit 1 and the battery information of the slave battery units 2, that is, determine the remaining capacities of the master battery unit 1 and each of the slave battery units 2.

The main controller 1' is further configured to determine, according to the remaining capacity and the current discharging stage of each battery unit when the system 10 is determined to be in the discharging mode, a target discharging unit that meets a discharging condition from the plurality of battery units (that is, a target discharging unit that meets the discharging condition is determined from one main battery unit 1 and at least one slave battery unit 2), and generate a discharging control instruction corresponding to the target discharging unit, so that the controller of the target discharging unit supplies power to the load 20 according to the discharging control instruction; alternatively, when it is determined that the system 10 is in the charging mode, a target charging unit satisfying the charging condition is determined from the plurality of battery units (i.e., a target charging unit satisfying the charging condition is determined from one main battery unit 1 and at least one slave battery unit 2) according to the remaining capacity and the current charging stage of each battery unit, and a charging control instruction corresponding to the target charging unit is generated, so that the controller of the target charging unit performs an operation of charging the target charging unit according to the charging control instruction.

The master controller 1' can also be used to detect whether a new slave battery unit 2 is connected to the system 10. Therefore, the whole power supply system can control the power supply system to supply power to the load in real time according to the number of the battery units, and/or charge the battery units in the power supply system.

In a possible implementation manner, the discharge control instruction may include a discharge power required to be discharged by the target discharge unit and/or a target remaining power after the discharge is completed. The discharge electric quantity can indicate the electric quantity to be released by the target discharge unit after the target discharge unit executes the discharge control instruction, and can be determined according to the residual electric quantity of the target discharge unit before discharge and a preset discharge proportion. The target remaining power after the discharging is completed may indicate the remaining power of the target discharging unit after the target discharging unit executes the discharging control instruction, and may be determined according to the discharge power (or a preset discharging ratio) and the remaining power of the target discharging unit before the discharging, which is not limited in this disclosure. For example, the preset discharge ratio may be set to 2%, and in the case where the remaining capacity of the target discharge unit before the discharge control command is issued is a, the discharge capacity may be 2% a, and the target remaining capacity after the discharge is completed may be 98% a. The target remaining power after the discharge is completed is greater than or equal to the remaining power of the target battery unit when the target battery unit reaches the end voltage (the voltage at which the battery unit cannot normally supply power to the load 20 due to too low output voltage and stops discharging), so as to ensure safe and effective discharge of the target battery unit.

In a possible implementation manner, the main controller 1' may be further configured to generate a discharge stop control instruction corresponding to the target discharge unit in the discharge mode, in a case where it is determined that the target discharge unit satisfies a discharge stop condition according to the battery information of the target discharge unit, so that the controller of the target discharge unit controls the target discharge unit to stop discharging according to the discharge stop control instruction. The discharge stop condition may include that the amount of power discharged by the target discharge unit is consistent with the amount of power to be discharged and/or that the remaining power of the target discharge unit after completion of discharge is consistent with the target remaining power after completion of discharge.

By setting the released electric quantity and/or the target residual electric quantity after the discharge is completed, and controlling the target discharge unit to stop the discharge under the condition that the electric quantity released by the target discharge unit is consistent with the released electric quantity and/or the residual electric quantity after the discharge is completed by the target discharge unit is consistent with the target residual electric quantity after the discharge is completed, the released electric quantity released by the target discharge unit each time can be effectively controlled, and the discharge of each battery unit can be controlled in order.

In a possible implementation manner, the charging control command may include a charging amount of the target charging unit that needs to be charged and/or a target remaining amount after charging is completed. The charging electric quantity can indicate the electric quantity to be charged by the target charging unit after the target charging unit executes the charging control instruction, and can be determined according to the residual electric quantity of the target charging unit before charging and a preset charging proportion. The target remaining power after the charging is completed may indicate the remaining power of the target charging unit after the target charging unit executes the charging control command, and may be determined according to the charging power (or a preset charging ratio) and the remaining power of the target charging unit before the charging, which is not limited in this disclosure. For example, a preset charging ratio may be set to 2%, and in the case where the remaining capacity of the target discharging unit before the charging control command is issued is b, the charging capacity is 2% b, and the target remaining capacity after the charging is completed is 102% b. The target residual capacity after charging is less than or equal to the maximum capacity of the target battery unit, so as to ensure safe and effective charging of the target battery unit.

In a possible implementation manner, the main controller 1' may be further configured to generate a charging stop control instruction corresponding to the target charging unit in the charging mode, in a case where it is determined that the target charging unit satisfies a charging stop condition according to the battery information of the target charging unit, so that the controller of the target charging unit controls the target charging unit to stop performing the operation of charging the target charging unit according to the charging stop control instruction. The charging stop condition may include that the amount of electricity charged by the target charging unit is consistent with the amount of charge electricity required to be charged and/or that the remaining amount of electricity of the target charging unit after completion of charging is consistent with the target remaining amount of electricity after completion of charging.

By setting the charging electric quantity and/or the target residual electric quantity after charging, and controlling the target charging unit to stop executing the operation of charging the target charging unit under the condition that the electric quantity charged by the target charging unit is consistent with the charging electric quantity, and/or the residual electric quantity after charging of the target charging unit is consistent with the target residual electric quantity after charging, the actual electric quantity charged by the target charging unit each time can be effectively controlled, and each battery unit can be charged in order.

In one possible implementation, the discharge phase may include a first phase and a second phase. The main controller 1' may be configured to determine the remaining power of each battery unit after determining that the system 10 is in the discharging mode, determine that the system 10 enters the first stage when the remaining power of at least two battery units in each battery unit is different (that is, the remaining power of the plurality of battery units is inconsistent), and perform operations corresponding to the first stage: and determining the minimum value of the residual electric quantities of the battery units, and sequentially controlling the battery units with the residual electric quantities larger than the minimum value to discharge according to the sequence of the residual electric quantities from large to small until the residual electric quantities of the battery units are all the minimum value. After the first phase is executed, and the remaining power of each battery unit is the same, the system 10 is determined to enter the second phase, and the corresponding operation of the second phase is executed: and controlling the battery units with the same residual capacity to discharge in sequence according to a set discharge rule.

In order to ensure the ordered discharge of each battery unit, a target discharge unit in the plurality of battery units needs to be determined in advance, and then a target discharge unit meeting a discharge condition is determined from the plurality of battery units according to the remaining capacity and the current discharge stage of each battery unit, which may include any one of the following operations 1 to 3.

Operation 1: in a case where the current discharging stage is the first stage, one of the battery cells corresponding to a maximum remaining capacity among remaining capacities of each of the battery cells may be determined as the target discharging unit. When it is determined that one battery unit corresponds to the maximum remaining capacity of the plurality of battery units according to the remaining capacity of each battery unit, the battery unit corresponding to the maximum remaining capacity of the remaining capacities of each battery unit may be determined as the target discharge unit. In the case where it is determined that a plurality of battery cells corresponding to the maximum remaining capacity among the plurality of battery cells are present according to the remaining capacity of each battery cell, the battery unit corresponding to any one of the maximum remaining capacities may be determined as the target discharge unit, or the target discharge unit may be determined in any one of the following preset manners, for example, numbers such as 1, 2, 3, and 4 may be set in advance for each battery unit, then the battery cell corresponding to the minimum value of the numbers of the battery cells corresponding to the plurality of maximum remaining capacities may be determined as the target discharge cell, the battery cell corresponding to the maximum value of the numbers of the battery cells corresponding to the maximum remaining capacities may be determined as the target discharge unit, or the battery cell corresponding to the median of the numbers of the battery cells corresponding to the maximum remaining capacities may be determined as the target discharge unit, which is not limited in this disclosure.

Operation 2: in the case where the current discharging phase is the second phase and the remaining amount of the at least one slave battery cell 2 is not consistent or the remaining amount of each battery cell is consistent, one of the slave battery cells 2 that needs to be discharged may be determined as the target discharging unit. For example, numbers such as 1, 2, 3, and 4 may be set in advance for each battery unit, then the slave battery unit 2 corresponding to the minimum value of the numbers of the slave battery units 2 with the same remaining power may be determined as the target discharge unit, the slave battery unit 2 corresponding to the maximum value of the numbers of the slave battery units 2 with the same remaining power may be determined as the target discharge unit, or the slave battery unit 2 corresponding to the median value of the numbers of the slave battery units 2 with the same remaining power may be determined as the target discharge unit, which is not limited by the present disclosure.

Operation 3: in the case where the current discharge stage is the second stage, the remaining capacity of the at least one slave battery unit 2 is identical, and the remaining capacity of the slave battery unit 2 is not identical to the remaining capacity of the master battery unit 1, the master battery unit 1 may be determined as the target discharge unit.

When the power supply system is determined to be in the discharging mode, the residual electric quantity of each battery unit is the same by executing the operation of the first phase, and when the residual electric quantity of each battery unit is determined to be the same, the system is determined to enter the second phase. In the second stage, the slave battery unit is controlled to supply power to the load first until the remaining capacity of the slave battery unit is inconsistent with the remaining capacity of the master battery unit (that is, the remaining capacity of the master battery unit is greater than the remaining capacity of the slave battery unit, and the difference between the remaining capacity of the master battery unit and the remaining capacity of the slave battery unit is the release capacity), and then the master battery unit is controlled to supply power to the load, so that the master battery unit can maintain enough capacity to the maximum extent, so that the master battery unit continuously supplies power to the master controller, and the master controller can control the ordered operation of the discharging process of the whole power supply system.

In a possible implementation manner, the charging stage may include a third stage and a fourth stage, where the main controller 1' may be configured to determine the remaining power of each battery unit first when it is determined that the system 10 is in the charging mode, determine that the system 10 enters the third stage and perform operations corresponding to the third stage when the remaining power of at least two battery units in the battery units is different: determining the maximum value of the residual electric quantity of the battery units, and sequentially controlling the battery units with the residual electric quantity smaller than the maximum value to charge according to the sequence of the residual electric quantity from small to large until the residual electric quantity of the battery units is the maximum value. After the operation corresponding to the third stage is performed and the remaining power of each battery unit is made to be the same, it is determined that the system 10 enters the fourth stage and the operation corresponding to the fourth stage is performed: and controlling the battery units with the same residual capacity to be charged in sequence according to a set charging rule.

In order to ensure that the battery units are charged in order, a target charging unit in the plurality of battery units needs to be determined in advance, and then the target charging unit meeting the charging condition is determined from the plurality of battery units according to the remaining capacity and the current charging stage of each battery unit, which may include any one of the following operations 4 to 6.

And operation 4: in a case where the current charging stage is the third stage, one of the battery cells corresponding to a minimum remaining capacity among remaining capacities of each of the battery cells may be determined as the target charging unit. When it is determined that one battery unit corresponds to the minimum remaining capacity of the plurality of battery units according to the remaining capacity of each battery unit, the battery unit corresponding to the minimum remaining capacity of the remaining capacity of each battery unit may be determined as the target charging unit. In the case where it is determined that a plurality of battery cells corresponding to the minimum remaining capacity among the plurality of battery cells are present according to the remaining capacity of each battery cell, the battery unit corresponding to any minimum remaining power may be determined as the target charging unit, or the target charging unit may be determined in any preset manner, for example, a number such as 1, 2, 3, 4 may be set in advance for each battery unit, the battery cell corresponding to the minimum value of the numbers of the battery cells corresponding to the plurality of minimum remaining capacities may then be determined as the target charging unit, the battery cell corresponding to the maximum value of the numbers of the battery cells corresponding to the minimum residual capacities may be determined as the target charging unit, or the battery cell corresponding to the median value of the numbers of the battery cells corresponding to the minimum residual capacities may be determined as the target charging unit, which is not limited by the present disclosure.

Operation 5: in the case where the current charging stage is the fourth stage and the remaining capacity of each battery cell is consistent, the main battery cell 1 may be determined as the target charging cell.

Operation 6: in the case where the current charging stage is the fourth stage, the remaining capacity of the slave battery unit 2 does not coincide with the remaining capacity of the master battery unit 1, and the remaining capacity of the at least one slave battery unit 2 does not coincide, one of the slave battery units 2 that needs to be charged may be determined as the target charging unit. For example, numbers such as 1, 2, 3, and 4 may be set in advance for each battery unit, then the slave battery unit 2 corresponding to the minimum value of the numbers in the slave battery units 2 with the same residual capacities may be determined as the target charging unit, the slave battery unit 2 corresponding to the maximum value of the numbers in the slave battery units 2 with the same residual capacities may be determined as the target charging unit, and the slave battery unit 2 corresponding to the median value of the numbers in the slave battery units 2 with the same residual capacities may be determined as the target charging unit.

And when the power supply system is determined to be in the charging mode, the residual electric quantity of each battery unit is the same by executing the operation of the third stage, and under the condition that the residual electric quantity of each battery unit is determined to be the same, the system is determined to enter the fourth stage. In the fourth stage, the main battery unit is charged first until the remaining capacity of the slave battery unit is inconsistent with the remaining capacity of the main battery unit (that is, the remaining capacity of the main battery unit is greater than the remaining capacity of the slave battery unit, and the difference between the remaining capacity of the main battery unit and the remaining capacity of the slave battery unit is the charging capacity), and the remaining capacity of at least one slave battery unit is inconsistent, and then the slave battery units are charged, so that the main battery unit can maintain enough capacity to the maximum extent, the main battery unit can continuously supply power to the main controller, and the main controller can control the charging process of the whole power supply system to be performed orderly.

For the convenience of understanding the power supply system 10 provided in the embodiment of the present disclosure, the power supply system 10 provided in the present disclosure is described below with reference to fig. 2 by taking the power supply system 10 including one master battery unit 1 and one slave battery unit 2 as an example.

Fig. 2 shows a schematic structural diagram of another power supply system provided according to an embodiment of the present disclosure. As shown in fig. 2, the power supply system 10 may include a master battery unit 1 and a slave battery unit 2. The main battery unit 1 may further include a main polarity protection circuit 2 ', a main charging circuit 3', a main charging switch 4 ', a main discharging switch 5', a main battery pack 6 ', and a main charging and discharging protection circuit 7'. The slave battery cell 2 may further include a slave polarity protection circuit 2 ", a slave charging circuit 3", a slave charging switch 4 ", a slave discharging switch 5", a slave battery pack 6 ", and a slave charge and discharge protection circuit 7".

Wherein the main polarity protection circuit 2 ' may include a main first diode D1 ' and a main second diode D2 ', an anode of the main first diode D1 ' is connected to the main discharge switch 5 ', a cathode of the main second diode D2 ' is connected to the main charging circuit 3 ', and a cathode of the main first diode D1 ' and an anode of the main second diode D2 ' are connected to the external power supply 30 and/or the load 20. The main polarity protection circuit 2' may also be a circuit including devices with unidirectional switching properties such as MOS transistors.

The main charging circuit 3 ' is also connected to the main charging switch 4 ' and the main controller 1 '.

The main discharge switch 5 ' is also connected to the main charge and discharge protection circuit 7 ' and the main controller 1 '.

The main charging switch 4 ' is also connected to the main charging and discharging protection circuit 7 ' and the main controller 1 '.

The main charge and discharge protection circuit 7 'is also connected to the main controller 1' and a first end of the master battery pack 6 ', and a second end of the master battery pack 6' is connected to the external power supply 30 and/or the load 20. The master battery pack 6' is used to power other components in the main battery unit 1.

Wherein the slave polarity protection circuit 2 "may include a slave first diode D1" and a slave second diode D2 ", an anode of the slave first diode D1" being connected to the slave discharge switch 5 ", a cathode of the slave second diode D2" being connected to the slave charging circuit 3 ", a cathode of the slave first diode D1" and an anode of the slave second diode D2 "being connected to the external power supply 30 and/or the load 20. The polarity protection circuit 2 ″ may also be a circuit including devices having unidirectional switching properties such as MOS transistors.

The slave charging circuit 3 "is also connected to the slave charging switch 4", the slave controller 1 ".

The slave discharge switch 5 "is also connected to the slave charge and discharge protection circuit 7", the slave controller 1 ".

The slave charge switch 4 "is also connected to the slave charge and discharge protection circuit 7", the slave controller 1 ".

The slave charge and discharge protection circuit 7 "is further connected to first ends of the slave controller 1" and the slave battery pack 6 ", and a second end of the slave battery pack 6" is connected to the external power supply 30 and/or the load 20. The slave battery pack 6 "is used to power other components in the slave battery unit 2.

In one possible implementation, the controller of the target charging unit (i.e., the target charging unit satisfying the charging condition determined from one main battery unit 1 and at least one slave battery unit 2) may control the charging switch to be turned on according to the charging control command, so that the external power supply 30 charges the target charging unit. For example, assuming that the target charging unit is the main battery unit 1, the main controller 1 'may control the main charging switch 4' to be turned on according to the charging control command so that the external power supply 30 charges the main battery unit 1.

In one possible implementation, the controller of the target discharge unit (i.e., the target discharge unit determined from the one main battery unit 1 and the at least one slave battery unit 2 to satisfy the discharge condition) may control the discharge switch to be turned on according to the discharge control command, so that the target discharge unit supplies power to the load 20. For example, assuming that the target charging unit is the slave battery unit 2, the slave controller 1 ″ may control the slave discharge switch 5 ″ to be turned on according to the discharge control instruction, so that the load 20 is supplied with power from the slave battery unit 2.

By providing a charging circuit in each battery cell (i.e., the master battery cell and the slave battery cells), the voltage output from the external power supply can be converted into the rated input voltage of each battery pack, so that each target charging cell can be protected when the external power supply charges the target charging cell. For example, assuming that the target charging unit is the main battery unit 1, the main charging circuit 3 'may convert the voltage output from the external power supply 30 into the rated input voltage of the main battery pack 6', so that the main battery unit 1 can be protected while the external power supply 30 charges the main battery unit 1.

By arranging the polarity protection circuit in each battery unit (i.e., the main battery unit and the slave battery unit), a charging current loop including a second diode, a charging circuit, a charging switch, a charging and discharging protection circuit, a battery pack and an external power supply source can be formed by the second diode in the polarity protection circuit when the system is in an external power supply mode or a charging mode; and the first diode in the polarity protection circuit prevents the current output by the external power supply from being input into the battery pack through the discharge switch and the charge-discharge protection circuit, thereby avoiding damaging the battery pack. When the system is in a discharging mode, a discharging current loop comprising a load, a first diode, a discharging switch, a charging and discharging protection circuit and the battery pack is formed through the first diode in the polarity protection circuit, and the current output by each battery pack is prevented from being directly output to the load through the charging switch and the charging circuit through the second diode in the polarity protection circuit. For example, assuming that the target charging unit is the slave battery unit 2, damage to the slave battery pack 6 "can be avoided by forming a charging current loop including the slave second diode D2", the slave charging circuit 3 ", the slave charging switch 4", the slave charge/discharge protection circuit 7 ", the slave battery pack 6", and the external power supply 30 from the slave second diode D2 "in the polarity protection circuit 2" when the system is in the external power supply mode or the charging mode, and preventing the current output from the external power supply 30 from passing through the slave charging switch 5, from the charge/discharge protection circuit 7 "to the slave battery pack 6" by the slave first diode D1 "in the polarity protection circuit 2". Assuming that the target discharge unit is the main battery unit 1, a discharge current loop including the load 20, the main first diode D1 ', the main discharge switch 5 ', the main charge/discharge protection circuit 7 ', and the main battery pack 6 ' may be formed by the main first diode D1 ' in the main polarity protection circuit 2 when the system is in the discharge mode, and the current output from the main battery pack 6 ' is prevented from being directly output to the load 20 through the main charge switch 4 ', the main charge circuit 3 ' by the main second diode D2 ' in the main polarity protection circuit 2.

The main charge/discharge protection circuit 7 'may be configured to collect battery information of the main battery pack 6' (that is, battery information of the main battery unit 1) in real time, and send the battery information of the main battery pack 6 'to the main controller 1' as the battery information of the main battery unit 1.

The slave charge and discharge protection circuit 7 "may be configured to collect the battery information of the slave battery pack 6" (i.e., the battery information of the slave battery cell 2) in real time, and transmit the battery information of the slave battery pack 6 "to the slave controller 1" as the battery information of the slave battery cell 2, so that the slave controller 1 "transmits the received battery information of the slave battery cell 2 to the master controller 1'.

In one possible implementation manner, the battery information may include the electric quantity of the battery pack, the input voltage of the battery pack, the output voltage of the battery pack, the input current of the battery pack, the output current of the battery pack, the temperature of the battery pack, and the like, so that the current operating state of the battery pack, which includes a charging state or a discharging state, may be determined according to the input voltage of the battery pack, the output voltage of the battery pack, the input current of the battery pack, and the output current of the battery pack.

In one possible implementation, the battery information may further include a current operating state of the battery pack.

The charging and discharging protection circuit (i.e., the master charging and discharging protection circuit 7', the slave charging and discharging protection circuit 7 ") may be a battery protection chip, and a thermistor, a resistor voltage division sampling circuit, a resistor detection circuit, etc. may be integrated on the battery protection chip, which is not limited in this disclosure. The temperature of the thermistor can be utilized, the voltage can be acquired through the resistor voltage division sampling circuit, and the current can be acquired through the resistor detection circuit. The battery protection chip analyzes the collected data, and can determine the current operating state of the battery pack (i.e., the current operating state of the battery unit corresponding to the battery pack).

By providing the charge and discharge protection circuit (i.e., the master charge and discharge protection circuit 7', the slave charge and discharge protection circuit 7 "), the battery information of each battery pack can be obtained in real time, so that each controller can execute the relevant operation in time according to the battery information of each battery pack.

In one possible implementation, the controller of the target discharge unit is further configured to stop receiving the discharge control instruction from the main controller 1' in a case where it is determined that the remaining capacity of the target discharge unit is less than the first threshold value according to the received battery information of the target discharge unit. The first threshold may be determined according to battery information of the target discharge unit, which is not limited by the present disclosure. For example, the first threshold value may be set to 1% to 5% of the rated capacity of the battery pack of the target discharge cell.

The controller of the target discharge unit stops receiving the discharge control instruction from the main controller under the condition that the residual electric quantity of the target discharge unit is smaller than the first threshold value, so that the phenomenon that the target discharge unit still continuously discharges under the condition that the electric quantity is too low, and the service life of the target discharge unit is influenced by over-discharge can be avoided.

Wherein the master controller 1' is connected to the slave controller 1 ". As shown in fig. 2, in one possible implementation, the master battery unit 1 may further comprise a master communication interface 8 ', the slave battery unit 2 may further comprise a slave communication interface 8 ", the master communication interface 8 ' being connected to the master controller 1 ', the slave communication interface 8" being connected to the slave controller 1 ", the master communication interface 8 ' such that the master controller 1 ' establishes a communication connection with the slave controller 1". Wherein, the communication interfaces (i.e., the master communication interface 8' and the slave communication interface 8 ") may be an I/O interface, an RS-485 interface, an RS-422 interface, etc., which is not limited by the present disclosure. Wherein the slave controller 1 "can send the received battery information of the slave battery unit 2 to the master controller 1 'through the slave communication interface 8" and the master communication interface 8'.

The communication interfaces are established among the battery units, so that the communication connection among the battery units can be established, the controller can acquire the battery information of the battery units in time, and the power supply system can be controlled to perform the ordered charging and discharging process better. The master battery unit can also be used for detecting whether a new slave battery unit is connected into the system through the master communication interface.

In a possible implementation, in the case where it can be determined that the voltage output by the external power supply coincides with the rated input voltage of the battery pack in each battery unit, a charging circuit may not be provided in each battery unit, for example, taking the main battery unit 1 in fig. 2 as an example, the main charging circuit 3 ' may not be provided, and the negative electrode of the main second diode D2 ' may be directly connected to the main charging switch 4 '. Taking the slave battery cell 2 in fig. 2 as an example, the slave charging circuit 3 ″ may not be provided, and the cathode of the slave second diode D2 ″ may be directly connected to the slave charging switch 4 ″.

In one possible implementation, each battery unit may be the same battery unit, and is divided into a master battery unit 1 and a slave battery unit 2 according to whether a controller in each battery unit is set as the master controller 1'.

In one possible implementation, the controller in each battery unit is configured to determine itself to be the main controller 1 'in case that it detects that it satisfies the setting condition of the main controller 1'; wherein, the setting condition of the main controller 1' includes any one of the following: detecting that a dial switch on a controller is opened; the received identification is consistent with the preset identification. The preset identifier may be an identifier of any one of the plurality of battery units.

In a possible implementation manner, the main controller 1' may be further configured to perform load 20 detection and external power supply 30 detection, and determine an operation mode of the system 10 according to the detection result, where the operation mode may include the discharging mode, the charging mode, and an external power supply mode.

Here, a voltage detection circuit for detecting the external power supply 30 may be provided in the controller in each battery cell. For example, the voltage detection circuit may be configured to determine that the external power supply 30 is detected, in a case where it is determined that the voltage of the external power supply 30 is greater than the second threshold; alternatively, in the case where it is determined that the voltage of the external power supply 30 is less than the second threshold value, it is determined that the external power supply 30 is not detected. Wherein the second threshold value may be determined in accordance with the output voltage of the external power supply 30, the voltage of each battery pack (i.e., the master battery pack 6 'or the slave battery pack 6'), the output voltage of the external power supply 30 being 24V, the maximum voltage of each battery pack (i.e., the master battery pack 6 'or the slave battery pack 6') being 16V, for example, the second threshold value may be set to 20V.

By determining that the external power supply is detected under the condition that the external power supply is greater than the second threshold, the external power supply can be ensured to provide stable power supply voltage.

Wherein, the main controller 1' determines the operation mode of the system 10 according to the detection result, and may include any one of the following:

in the case where the detection result is that the load 20 is detected and the external power supply 30 is not detected, it is determined that the system 10 is in the discharging mode.

In the case that the load 20 is not detected and the external power supply 30 is detected as the detection result, it is determined that the system 10 is in the charging mode, so that the external power supply 30 charges the target charging unit.

In a case where the detection result is that the load 20 is detected and the external power supply 30 is detected, it is determined that the system 10 is in the external power supply mode, so that the external power supply 30 supplies power to the load 20 and charges the target charging unit.

The method comprises the steps that under the condition that a load is detected and an external power supply is detected, the external power supply supplies power to the load; under the condition that the load is detected and the external power supply is not detected, the target discharge unit is used for supplying power to the load, the power can be continuously supplied to the load, and the influence on the normal operation of the whole production system under the condition that the external power supply is not available is avoided. And under the condition that the external power supply is detected, the external power supply is used for charging the target charging unit, so that each battery unit in the power supply system can be ensured to provide dischargeable electric quantity in a subsequent discharging mode.

In a possible implementation manner, the main controller 1' may be further configured to determine that the system 10 is in the external power supply mode and generate a discharge stop control instruction corresponding to the target discharge unit, so that the controller of the target discharge unit controls the target discharge unit to stop discharging according to the discharge stop control instruction, if the system 10 is determined to be in the discharge mode and the detection result is that the external power supply 30 is detected.

By setting the power supply system to continue external power supply detection in the discharging mode, and controlling the target discharging unit to stop discharging when the external power supply is detected, the electric quantity of each battery unit in the power supply system can be effectively saved.

Fig. 3 shows a schematic structural diagram of another power supply system provided according to an embodiment of the present disclosure. As shown in fig. 3, the power supply system 10 may include one master battery unit 1 and two slave battery units 2. Wherein each slave battery unit 2 can establish a communication connection with the master battery unit 1 through the slave communication interface 8 "and the master communication interface 8', and a communication connection can also be established between the slave battery units 2 through the slave communication interface 8".

Fig. 4 shows a flow chart of a power supply method provided according to an embodiment of the present disclosure. As shown in fig. 4, the method is applied to the master controller in the power supply system, the power supply system includes a plurality of battery units, the plurality of battery units includes a master battery unit and at least one slave battery unit, the master battery unit includes the master controller, and the method includes steps S1 to S2. The step S2 includes steps S21 and S22. Step S21 may be directly performed after step S1 is performed, or step S22 may be directly performed after step S1 is performed, which is not limited by the present disclosure.

In step S1, the remaining capacity of each of the battery cells is determined based on the received battery information of the master battery cell and the battery information of the slave battery cells.

In step S21, when it is determined that the system is in the discharging mode, a target discharging unit satisfying a discharging condition is determined from the plurality of battery units according to the remaining capacity and the current discharging stage of each battery unit, and a discharging control instruction corresponding to the target discharging unit is generated, so that the controller of the target discharging unit supplies power to the load according to the discharging control instruction.

In step S22, when it is determined that the system is in the charging mode, a target charging unit satisfying the charging condition is determined from the plurality of battery units according to the remaining capacity and the current charging stage of each battery unit, and a charging control command corresponding to the target charging unit is generated, so that the controller of the target charging unit performs an operation of charging the target charging unit according to the charging control command.

According to the power supply method provided by the disclosure, the battery information of each battery unit is sent to the main controller, so that the main controller determines that the power supply system determines the target discharging unit and the target charging unit in different working modes, and can orderly control each battery unit in the power supply system to supply power to the load, or charge each battery unit in the power supply system, so that each battery unit in the power supply system can be protected while stable power supply voltage is provided for the load. In addition, the number of the battery units in the power supply system for realizing the power supply method can be set according to practical application scenes, so that the power supply method can meet the power supply time length requirements of different production systems, and the power supply method conforms to the ideas of intelligent mines and safe production.

Having described embodiments of the present disclosure, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terms used herein were chosen in order to best explain the principles of the embodiments, the practical application, or technical improvements to the techniques in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A power supply system, comprising a plurality of battery units including a master battery unit and at least one slave battery unit, the master battery unit including a master controller, the slave battery unit including a slave controller,

2. The power supply system of claim 1, wherein the discharging phase comprises a first phase and a second phase, and the determining a target discharging unit satisfying a discharging condition from the plurality of battery units according to the remaining capacity of each battery unit and the current discharging phase comprises any one of:

3. The power supply system according to claim 1, wherein the discharge control command includes a discharge power required to be discharged by the target discharge unit and/or a target remaining power after discharge is completed.

4. The power supply system of claim 1, wherein the charging phase comprises a third phase and a fourth phase, and the determining of the target charging unit satisfying the charging condition from the plurality of battery units according to the remaining capacity of each battery unit and the current charging phase comprises any one of:

5. The power supply system according to claim 1, wherein the charging control command includes a charging amount of power required to be charged by the target charging unit and/or a target remaining power after charging is completed.

6. The power supply system according to any one of claims 1 to 5,

the main controller is further used for carrying out load detection and external power supply detection, and determining the working mode of the system according to the detection result, wherein the working mode comprises the discharging mode, the charging mode and the external power supply mode;

and under the condition that the detection result is that the load is detected and the external power supply is detected, determining that the system is in the external power supply mode so that the external power supply supplies power to the load and charges the target charging unit.

7. The power supply system according to claim 6,

the main controller is further configured to determine that the system is in the external power supply mode and generate a discharge stop control instruction corresponding to the target discharge unit when the system is determined to be in the discharge mode and the detection result indicates that the external power supply is detected, so that the controller of the target discharge unit controls the target discharge unit to stop discharging according to the discharge stop control instruction.

8. The power supply system according to claim 7,

the main battery unit also comprises a main polarity protection circuit, a main charging switch, a main discharging switch, a main battery pack and a main charging and discharging protection circuit;

the master controller is connected to the slave controller.

9. The power supply system according to claim 1, wherein the controller of the target discharge unit is further configured to stop receiving the discharge control instruction from the main controller if it is determined that the remaining capacity of the target discharge unit is less than the first threshold value according to the received battery information of the target discharge unit.

10. The power supply system according to claim 1, wherein the controller in each battery unit is configured to determine itself as the master controller in case that it is detected that the controller satisfies the master controller setting condition;

detecting that a dial switch on a controller is opened;

the received identification is consistent with the preset identification.

11. A power supply method applied to a master controller in a power supply system according to any one of claims 1 to 10, wherein the power supply system comprises a plurality of battery units, the plurality of battery units comprise a master battery unit and at least one slave battery unit, the master battery unit comprises the master controller, and the method comprises: