CN117134456A - Control method, device, equipment and storage medium for voltage balance of multi-battery system - Google Patents

Control method, device, equipment and storage medium for voltage balance of multi-battery system Download PDF

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Publication number
CN117134456A
CN117134456A CN202311094583.4A CN202311094583A CN117134456A CN 117134456 A CN117134456 A CN 117134456A CN 202311094583 A CN202311094583 A CN 202311094583A CN 117134456 A CN117134456 A CN 117134456A
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CN
China
Prior art keywords
battery
voltage
voltage battery
low
battery system
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Application number
CN202311094583.4A
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Chinese (zh)
Inventor
赵帅伟
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Shanghai Paizhi Energy Co ltd
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Shanghai Paizhi Energy Co ltd
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Priority to CN202311094583.4A priority Critical patent/CN117134456A/en
Publication of CN117134456A publication Critical patent/CN117134456A/en
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
    • H02J7/0014—Circuits for equalisation of charge between batteries
    • H02J7/0016—Circuits for equalisation of charge between batteries using shunting, discharge or bypass circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
    • H02J7/0014—Circuits for equalisation of charge between batteries
    • H02J7/0019—Circuits for equalisation of charge between batteries using switched or multiplexed charge circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing

Abstract

The invention discloses a control method, a device, equipment and a storage medium for voltage balance of a multi-battery system, wherein the control method comprises the following steps: acquiring a high-voltage battery and a low-voltage battery in a multi-battery system; the high voltage battery is controlled to charge the low voltage battery to equalize the batteries of different voltages in the multi-battery system to the same voltage. According to the invention, the high-voltage battery in the multi-battery system is controlled to charge the low-voltage battery, so that the batteries with different voltages in the multi-battery system are balanced to the same voltage, the dangerous situation caused by different voltages is avoided, and the voltage balancing accuracy of the multi-battery system is improved.

Description

Control method, device, equipment and storage medium for voltage balance of multi-battery system
Technical Field
The present invention relates to the field of battery management technologies, and in particular, to a method, an apparatus, a device, and a storage medium for controlling voltage equalization of a multi-battery system.
Background
In the energy storage field, there is the scene that a plurality of batteries are used in parallel, if the voltage of a plurality of batteries is different, when installation or after-sales change module, the unavoidable battery that will have different voltages is incorporated in the energy storage cabinet simultaneously. If the energy storage cabinet is not used for a long time, the voltage between different modules is different, and dangerous occurrence can be caused.
Disclosure of Invention
The invention aims to overcome the defect that the voltage difference among different modules can cause danger in the prior art, and provides a control method, a device, equipment and a storage medium for voltage balance of a multi-battery system.
The invention solves the technical problems by the following technical scheme:
the first aspect of the present invention provides a control method for voltage equalization of a multi-battery system, the control method comprising:
acquiring a high-voltage battery and a low-voltage battery in a multi-battery system;
and controlling the high-voltage battery to charge the low-voltage battery so as to balance batteries with different voltages in the multi-battery system into the same voltage.
Preferably, the multi-battery system includes a plurality of batteries, each battery including an AFE and an MCU; the step of obtaining the high voltage battery and the low voltage battery in the multi-battery system comprises the following steps:
each battery acquires voltage values of other batteries in the multi-battery system through the AFE of the battery and transmits the voltage values of the other batteries to the MCU of each battery through the AFE;
the MCU of each battery compares the voltage values of the plurality of batteries to obtain a high voltage battery and a low voltage battery in the multi-battery system.
Preferably, each cell further comprises a pre-discharge PMOS tube; the step of controlling the high voltage battery to charge the low voltage battery to equalize the batteries of different voltages in the multi-battery system to the same voltage includes:
controlling a pre-discharge PMOS tube in the high-voltage battery to be opened through an MCU in the high-voltage battery;
transmitting the current of the high voltage battery to the low voltage battery;
and charging the low-voltage battery by the current of the high-voltage battery so as to balance batteries with different voltages in the multi-battery system into the same voltage.
Preferably, each cell further comprises a pre-discharge resistor; the step of transmitting the current of the high voltage battery to the low voltage battery includes:
and transmitting the current of the high-voltage battery to the low-voltage battery through a pre-discharge resistor.
Preferably, each battery further comprises a pre-discharge PMOS tube, a pre-discharge resistor and a thermistor, wherein the thermistor is arranged on the pre-discharge resistor; the control method further includes:
acquiring a temperature value of the pre-amplifier resistor through the thermistor;
transmitting the temperature value of the pre-discharge resistor to an MCU;
and the MCU adjusts the frequency of the pre-discharge PMOS tube according to the temperature value of the pre-discharge resistor so that the temperature value of the pre-discharge resistor is smaller than a preset temperature value.
Preferably, each battery further includes a relay, and the control method further includes:
and controlling the relay of the high-voltage battery to be opened and the relay of the low-voltage battery to be closed when the multi-battery system is in a discharging mode.
Preferably, the step of controlling the pre-discharge PMOS transistor in the high voltage battery to be turned on by the MCU in the high voltage battery includes:
controlling a pre-discharge PMOS tube in the high-voltage battery to be opened in a pulsation manner through an MCU in the high-voltage battery;
the step of transmitting the current of the high voltage battery to the low voltage battery includes:
and transmitting the pulsating current of the high-voltage battery to the low-voltage battery.
A second aspect of the present invention provides a control device for voltage equalization of a multi-battery system, the control device comprising:
the first acquisition module is used for acquiring a high-voltage battery and a low-voltage battery in the multi-battery system;
and the first control module is used for controlling the high-voltage battery to charge the low-voltage battery so as to balance batteries with different voltages in the multi-battery system into the same voltage.
Preferably, the multi-battery system includes a plurality of batteries, each battery including an AFE and an MCU; the first acquisition module includes:
the first transmission unit is used for each battery to acquire the voltage values of other batteries in the multi-battery system through the AFE of the first transmission unit, and transmitting the voltage values of the other batteries to the MCU of each battery through the AFE;
and the MCU is used for comparing the voltage values of the plurality of batteries to obtain a high-voltage battery and a low-voltage battery in the multi-battery system.
Preferably, each cell further comprises a pre-discharge PMOS tube; the first control module includes:
the first control unit is used for controlling the pre-discharge PMOS tube in the high-voltage battery to be opened through the MCU in the high-voltage battery;
a second transmission unit for transmitting the current of the high-voltage battery to the low-voltage battery;
and the charging unit is used for charging the low-voltage battery through the current of the high-voltage battery so as to balance batteries with different voltages in the multi-battery system into the same voltage.
Preferably, each cell further comprises a pre-discharge resistor;
and the second transmission unit is used for transmitting the current of the high-voltage battery to the low-voltage battery through a pre-discharge resistor.
Preferably, each battery further comprises a pre-discharge PMOS tube, a pre-discharge resistor and a thermistor, wherein the thermistor is arranged on the pre-discharge resistor; the control device further includes:
the second acquisition module is used for acquiring the temperature value of the pre-amplifier resistor through the thermistor;
the transmission module is used for transmitting the temperature value of the pre-discharge resistor to the MCU;
and the adjusting module is used for adjusting the frequency of the pre-discharge PMOS tube according to the temperature value of the pre-discharge resistor by the MCU so that the temperature value of the pre-discharge resistor is smaller than a preset temperature value.
Preferably, each battery further includes a relay, and the control device further includes:
and the second control module is used for controlling the relay of the high-voltage battery to be opened and controlling the relay of the low-voltage battery to be closed under the condition that the multi-battery system is in a discharging mode.
Preferably, the first control unit is used for controlling the pulse opening of the pre-discharge PMOS tube in the high-voltage battery through the MCU in the high-voltage battery;
and the second transmission unit is used for transmitting the pulsating current of the high-voltage battery to the low-voltage battery.
A third aspect of the present invention provides an electronic device comprising a memory, a processor and a computer program stored on the memory for running on the processor, the processor implementing the control method of multi-battery system voltage balancing according to the first aspect when executing the computer program.
A fourth aspect of the present invention provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the method of controlling voltage balancing of a multi-battery system according to the first aspect.
On the basis of conforming to the common knowledge in the field, the above preferred conditions can be arbitrarily combined to obtain the preferred examples of the invention.
The invention has the positive progress effects that:
according to the invention, the high-voltage battery in the multi-battery system is controlled to charge the low-voltage battery, so that the batteries with different voltages in the multi-battery system are balanced to the same voltage, the dangerous situation caused by different voltages is avoided, and the voltage balancing accuracy of the multi-battery system is improved.
Drawings
Fig. 1 is a first flowchart of a control method for voltage equalization of a multi-battery system according to embodiment 1 of the present invention.
Fig. 2 is a schematic structural view of the battery according to embodiments 1 and 2 of the present invention.
Fig. 3 is a flowchart of step 101 of the control method of voltage equalization of the multi-battery system according to embodiment 1 of the present invention.
Fig. 4 is a flowchart of step 102 of the control method of voltage balancing of the multi-battery system according to embodiment 1 of the present invention.
Fig. 5 is a second flowchart of a control method of voltage equalization of a multi-battery system according to embodiment 1 of the present invention.
Fig. 6 is a block diagram of a control device for voltage equalization of a multi-battery system according to embodiment 2 of the present invention.
Fig. 7 is a schematic structural diagram of an electronic device for implementing a control method for voltage balancing of a multi-battery system according to embodiment 3 of the present invention.
Detailed Description
The invention is further illustrated by means of the following examples, which are not intended to limit the scope of the invention.
Example 1
The method for controlling voltage equalization of a multi-battery system according to this embodiment, as shown in fig. 1, includes:
step 101, obtaining a high-voltage battery and a low-voltage battery in a multi-battery system;
step 102, controlling the high-voltage battery to charge the low-voltage battery, so as to balance the batteries with different voltages in the multi-battery system into the same voltage.
In this embodiment, the high voltage battery is pulsed, the low voltage battery is pulsed, and finally a plurality of batteries reach an equilibrium state.
In an alternative embodiment, the multi-battery system includes a plurality of batteries, as shown in FIG. 2, each battery including an AFE11 and an MCU12; as shown in fig. 3, step 101 includes:
step 1011, each battery acquires the voltage values of other batteries in the multi-battery system through the AFE of the battery, and transmits the voltage values of the other batteries to the MCU of each battery through the AFE;
in this embodiment, a plurality of batteries are connected in parallel, and data transmission is performed between each battery through a CAN bus.
In an implementation, each battery may obtain voltage values of other batteries in the multi-battery system.
Step 1012, the MCU of each battery compares the voltage values of the plurality of batteries to obtain a high voltage battery and a low voltage battery in the multi-battery system.
In an alternative embodiment, as shown in fig. 2, each cell further comprises a pre-discharge PMOS tube 13; as shown in fig. 4, step 102 includes:
step 1021, controlling the opening of a pre-discharge PMOS tube in the high-voltage battery through an MCU in the high-voltage battery;
step 1022, transmitting the current of the high-voltage battery to the low-voltage battery;
step 1023, charging the low-voltage battery by the current of the high-voltage battery to balance the batteries with different voltages in the multi-battery system to the same voltage.
In the specific implementation process, after the multi-battery system enters an equalization mode, the MCU in the high-voltage battery controls the pre-discharge PMOS tube in the high-voltage battery to be opened; the current of the high voltage battery is provided to charge the low voltage battery to equalize the batteries of different voltages in the multi-battery system to the same voltage.
In an alternative embodiment, as shown in FIG. 2, each cell further includes a pre-discharge resistor 14; step 1022 includes:
step 10221, transmitting the current of the high-voltage battery to the low-voltage battery through the pre-discharge resistor.
In this embodiment, the pre-discharge resistor limits the current of the high-voltage battery so that the current is not excessively large, thereby ensuring the safety of the multi-battery system.
In an alternative embodiment, as shown in fig. 2, each battery further includes a pre-discharge PMOS tube 13, a pre-discharge resistor 14, and a thermistor 15, the thermistor 15 being disposed on the pre-discharge resistor 14; as shown in fig. 5, the control method further includes:
step 201, obtaining a temperature value of a pre-amplifier resistor through a thermistor;
step 202, transmitting the temperature value of the pre-discharge resistor to an MCU;
and 203, the MCU adjusts the frequency of the pre-discharge PMOS tube according to the temperature value of the pre-discharge resistor so that the temperature value of the pre-discharge resistor is smaller than a preset temperature value.
In this embodiment, when the temperature of the pre-discharge resistor increases, the pulsation frequency of the pre-discharge PMOS transistor is reduced (i.e., the opening time of the pre-discharge PMOS transistor is shortened); when the temperature of the pre-discharge resistor is reduced, the pulsation frequency of the pre-discharge PMOS tube is increased (namely, the opening time of the pre-discharge PMOS tube is prolonged).
In a specific implementation process, the pre-discharge resistor may overheat during the equalization mode of the multi-cell system. Therefore, a temperature sample is arranged on the pre-amplifier resistor (namely, a thermistor is arranged on the pre-amplifier resistor), the temperature value of the pre-amplifier resistor is fed back to the MCU, and the MCU adjusts the pulsation frequency of the pre-discharge PMOS tube according to the temperature value of the pre-amplifier resistor, so that the temperature value of the pre-amplifier resistor is smaller than a preset temperature value.
It should be noted that the preset temperature value is set according to the actual situation, and is not specifically limited herein.
In an alternative embodiment, as shown in fig. 2, each battery further includes a relay 16, and the control method further includes:
step 301, in the case that the multi-battery system is in a discharging mode, controlling the relay of the high-voltage battery to be opened and the relay of the low-voltage battery to be closed.
In this embodiment, after the batteries with different voltages are connected in parallel to the multi-battery system, the relay of the high-voltage battery is turned on to supply power to the multi-battery system without opening the relay of the low-voltage battery under the condition that the multi-battery system is in a discharging mode.
In an alternative embodiment, step 1021 includes:
step 10211, controlling a pre-discharge PMOS tube in the high-voltage battery to be opened in a pulsation manner through an MCU in the high-voltage battery;
step 1022 includes:
step 10221, transmitting the pulsating current of the high voltage battery to the low voltage battery.
In the embodiment, the MCU in the high-voltage battery is used for controlling the pulse opening of the pre-discharge PMOS tube in the high-voltage battery; for example, the pre-discharge PMOS transistor may be controlled to be in an on state for one quarter of the time and in an off state for three quarters of the time, so as to avoid the pre-discharge resistance temperature being too high due to the fact that the pre-discharge PMOS transistor is always on.
According to the embodiment, the high-voltage battery in the multi-battery system is controlled to charge the low-voltage battery, so that the batteries with different voltages in the multi-battery system are balanced to the same voltage, dangerous situations caused by different voltages are avoided, and the voltage balancing accuracy of the multi-battery system is improved.
Example 2
As shown in fig. 6, the control device for voltage equalization of a multi-battery system according to the present embodiment includes: a first acquisition module 21, a first control module 22;
a first acquisition module 21 for acquiring a high-voltage battery and a low-voltage battery in a multi-battery system;
the first control module 22 is configured to control the high-voltage battery to charge the low-voltage battery, so as to balance the batteries with different voltages in the multi-battery system to the same voltage.
In this embodiment, the high voltage battery is pulsed, the low voltage battery is pulsed, and finally a plurality of batteries reach an equilibrium state.
In an alternative embodiment, the multi-battery system includes a plurality of batteries, as shown in FIG. 2, each battery including an AFE11 and an MCU12; as shown in fig. 6, the first acquisition module 21 includes: a first transmission unit 211, a comparison unit 212;
a first transmission unit 211, configured to obtain, by using an AFE of each battery, a voltage value of another battery in the multi-battery system, and transmit, by using the AFE, the voltage value of the another battery to the MCU of each battery;
in this embodiment, a plurality of batteries are connected in parallel, and data transmission is performed between each battery through a CAN bus.
In an implementation, each battery may obtain voltage values of other batteries in the multi-battery system.
And a comparison unit 212 for comparing the voltage values of the plurality of batteries by the MCU of each battery to obtain a high voltage battery and a low voltage battery in the multi-battery system.
In an alternative embodiment, as shown in fig. 2, each cell further comprises a pre-discharge PMOS tube 13; as shown in fig. 6, the first control module 22 includes: a first control unit 221, a second transmission unit 222, and a charging unit 223;
a first control unit 221 for controlling the pre-discharge PMOS transistor in the high voltage battery to be turned on through the MCU in the high voltage battery;
a second transmission unit 222 for transmitting the current of the high-voltage battery to the low-voltage battery;
and a charging unit 223 for charging the low-voltage battery by the current of the high-voltage battery to equalize the batteries of different voltages in the multi-battery system to the same voltage.
In the specific implementation process, after the multi-battery system enters an equalization mode, the MCU in the high-voltage battery controls the pre-discharge PMOS tube in the high-voltage battery to be opened; the current of the high voltage battery is provided to charge the low voltage battery to equalize the batteries of different voltages in the multi-battery system to the same voltage.
In an alternative embodiment, as shown in FIG. 2, each cell further includes a pre-discharge resistor 14; the second transmission unit 222 is used for transmitting the current of the high-voltage battery to the low-voltage battery through the pre-discharge resistor.
In this embodiment, the pre-discharge resistor limits the current of the high-voltage battery so that the current is not excessively large, thereby ensuring the safety of the multi-battery system.
In an alternative embodiment, as shown in fig. 2, each battery further includes a pre-discharge PMOS tube 13, a pre-discharge resistor 14, and a thermistor 15, the thermistor 15 being disposed on the pre-discharge resistor 14; as shown in fig. 6, the control device further includes: a second acquisition module 23, a transmission module 24, and an adjustment module 25;
a second obtaining module 23, configured to obtain a temperature value of the pre-amplifier resistor through the thermistor;
a transmission module 24 for transmitting the temperature value of the pre-discharge resistor to the MCU;
the adjusting module 25 is configured to adjust the frequency of the pre-discharge PMOS tube according to the temperature value of the pre-discharge resistor, so that the temperature value of the pre-discharge resistor is smaller than a preset temperature value.
In this embodiment, when the temperature of the pre-discharge resistor increases, the pulsation frequency of the pre-discharge PMOS transistor is reduced (i.e., the opening time of the pre-discharge PMOS transistor is shortened); when the temperature of the pre-discharge resistor is reduced, the pulsation frequency of the pre-discharge PMOS tube is increased (namely, the opening time of the pre-discharge PMOS tube is prolonged).
In a specific implementation process, the pre-discharge resistor may overheat during the equalization mode of the multi-cell system. Therefore, a temperature sample is arranged on the pre-amplifier resistor (namely, a thermistor is arranged on the pre-amplifier resistor), the temperature value of the pre-amplifier resistor is fed back to the MCU, and the MCU adjusts the pulsation frequency of the pre-discharge PMOS tube according to the temperature value of the pre-amplifier resistor, so that the temperature value of the pre-amplifier resistor is smaller than a preset temperature value.
It should be noted that the preset temperature value is set according to the actual situation, and is not specifically limited herein.
In an alternative embodiment, as shown in fig. 2, each battery further includes a relay 16, as shown in fig. 6, and the control device further includes: a second control module 26;
a second control module 26 for controlling the relay of the high voltage battery to be opened and the relay of the low voltage battery to be closed in case the multi-battery system is in a discharge mode.
In this embodiment, after the batteries with different voltages are connected in parallel to the multi-battery system, the relay of the high-voltage battery is turned on to supply power to the multi-battery system without opening the relay of the low-voltage battery under the condition that the multi-battery system is in a discharging mode.
In an alternative embodiment, the first control unit 221 is configured to control, through the MCU in the high-voltage battery, the pulse opening of the pre-discharge PMOS transistor in the high-voltage battery;
the second transmission unit 222 is used for transmitting the pulsating current of the high-voltage battery to the low-voltage battery.
In the embodiment, the MCU in the high-voltage battery is used for controlling the pulse opening of the pre-discharge PMOS tube in the high-voltage battery; for example, the pre-discharge PMOS transistor may be controlled to be in an on state for one quarter of the time and in an off state for three quarters of the time, so as to avoid the pre-discharge resistance temperature being too high due to the fact that the pre-discharge PMOS transistor is always on.
According to the embodiment, the high-voltage battery in the multi-battery system is controlled to charge the low-voltage battery, so that the batteries with different voltages in the multi-battery system are balanced to the same voltage, dangerous situations caused by different voltages are avoided, and the voltage balancing accuracy of the multi-battery system is improved.
Example 3
Fig. 7 is a schematic structural diagram of an electronic device according to embodiment 3 of the present invention. The electronic device includes a memory, a processor, and a computer program stored on the memory for running on the processor, which when executing the program implements the control method of the multi-battery system voltage balancing of embodiment 1. The electronic device 30 shown in fig. 7 is only an example and should not be construed as limiting the functionality and scope of use of embodiments of the present invention.
As shown in fig. 7, the electronic device 30 may be embodied in the form of a general purpose computing device, which may be a server device, for example. Components of electronic device 30 may include, but are not limited to: the at least one processor 31, the at least one memory 32, a bus 33 connecting the different system components, including the memory 32 and the processor 31.
The bus 33 includes a data bus, an address bus, and a control bus.
Memory 32 may include volatile memory such as Random Access Memory (RAM) 321 and/or cache memory 322, and may further include Read Only Memory (ROM) 323.
Memory 32 may also include a program/utility 325 having a set (at least one) of program modules 324, such program modules 324 including, but not limited to: an operating system, one or more application programs, other program modules, and program data, each or some combination of which may include an implementation of a network environment.
The processor 31 executes various functional applications and data processing, such as the control method of the voltage equalization of the multi-battery system of embodiment 1 of the present invention, by running a computer program stored in the memory 32.
The electronic device 30 may also communicate with one or more external devices 34 (e.g., keyboard, pointing device, etc.). Such communication may be through an input/output (I/O) interface 35. Also, model-generating device 30 may also communicate with one or more networks, such as a Local Area Network (LAN), a Wide Area Network (WAN), and/or a public network, such as the internet, via network adapter 36. As shown in fig. 7, network adapter 36 communicates with the other modules of model-generating device 30 via bus 33. It should be appreciated that although not shown in the figures, other hardware and/or software modules may be used in connection with the model-generating device 30, including, but not limited to: microcode, device drivers, redundant processors, external disk drive arrays, RAID (disk array) systems, tape drives, data backup storage systems, and the like.
It should be noted that although several units/modules or sub-units/modules of an electronic device are mentioned in the above detailed description, such a division is merely exemplary and not mandatory. Indeed, the features and functionality of two or more units/modules described above may be embodied in one unit/module in accordance with embodiments of the present invention. Conversely, the features and functions of one unit/module described above may be further divided into ones that are embodied by a plurality of units/modules.
Example 4
The present embodiment provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the control method of multi-battery system voltage equalization provided by embodiment 1.
More specifically, among others, readable storage media may be employed including, but not limited to: portable disk, hard disk, random access memory, read only memory, erasable programmable read only memory, optical storage device, magnetic storage device, or any suitable combination of the foregoing.
In a possible embodiment, the invention may also be implemented in the form of a program product comprising program code for causing a terminal device to carry out the control method for implementing the voltage balancing of a multi-battery system as described in embodiment 1, when the program product is run on the terminal device.
Wherein the program code for carrying out the invention may be written in any combination of one or more programming languages, the program code may execute entirely on the user device, partly on the user device, as a stand-alone software package, partly on the user device, partly on a remote device or entirely on the remote device.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the principles and spirit of the invention, but such changes and modifications fall within the scope of the invention.

Claims (10)

1. A control method for voltage equalization of a multi-battery system, the control method comprising:
acquiring a high-voltage battery and a low-voltage battery in a multi-battery system;
and controlling the high-voltage battery to charge the low-voltage battery so as to balance batteries with different voltages in the multi-battery system into the same voltage.
2. The method for controlling voltage equalization of a multi-battery system of claim 1, wherein said multi-battery system comprises a plurality of batteries, each battery comprising an AFE and an MCU; the step of obtaining the high voltage battery and the low voltage battery in the multi-battery system comprises the following steps:
each battery acquires voltage values of other batteries in the multi-battery system through the AFE of the battery and transmits the voltage values of the other batteries to the MCU of each battery through the AFE;
the MCU of each battery compares the voltage values of the plurality of batteries to obtain a high voltage battery and a low voltage battery in the multi-battery system.
3. The method for controlling voltage equalization in a multi-cell system of claim 1, wherein each cell further comprises a pre-discharge PMOS tube; the step of controlling the high voltage battery to charge the low voltage battery to equalize the batteries of different voltages in the multi-battery system to the same voltage includes:
controlling a pre-discharge PMOS tube in the high-voltage battery to be opened through an MCU in the high-voltage battery;
transmitting the current of the high voltage battery to the low voltage battery;
and charging the low-voltage battery by the current of the high-voltage battery so as to balance batteries with different voltages in the multi-battery system into the same voltage.
4. The method for controlling voltage equalization of a multi-cell system of claim 3, wherein each cell further comprises a pre-discharge resistor; the step of transmitting the current of the high voltage battery to the low voltage battery includes:
and transmitting the current of the high-voltage battery to the low-voltage battery through a pre-discharge resistor.
5. The method for controlling voltage equalization of a multi-cell system of claim 1, wherein each cell further comprises a pre-discharge PMOS tube, a pre-discharge resistor, and a thermistor, said thermistor being disposed on said pre-discharge resistor; the control method further includes:
acquiring a temperature value of the pre-amplifier resistor through the thermistor;
transmitting the temperature value of the pre-discharge resistor to an MCU;
and the MCU adjusts the frequency of the pre-discharge PMOS tube according to the temperature value of the pre-discharge resistor so that the temperature value of the pre-discharge resistor is smaller than a preset temperature value.
6. The control method for voltage equalization of a multi-cell system of claim 1, wherein each cell further comprises a relay, said control method further comprising:
and controlling the relay of the high-voltage battery to be opened and the relay of the low-voltage battery to be closed when the multi-battery system is in a discharging mode.
7. The method for controlling voltage equalization of a multi-battery system as defined in claim 3, wherein said step of controlling the opening of the pre-discharge PMOS transistor in said high-voltage battery by the MCU in said high-voltage battery comprises:
controlling a pre-discharge PMOS tube in the high-voltage battery to be opened in a pulsation manner through an MCU in the high-voltage battery;
the step of transmitting the current of the high voltage battery to the low voltage battery includes:
and transmitting the pulsating current of the high-voltage battery to the low-voltage battery.
8. A control device for voltage equalization of a multi-battery system, the control device comprising:
the first acquisition module is used for acquiring a high-voltage battery and a low-voltage battery in the multi-battery system;
and the first control module is used for controlling the high-voltage battery to charge the low-voltage battery so as to balance batteries with different voltages in the multi-battery system into the same voltage.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory for execution on the processor, characterized in that the processor implements a method of controlling voltage balancing of a multi-battery system according to any one of claims 1-7 when executing the computer program.
10. A computer-readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the method of controlling voltage equalization of a multi-battery system according to any of claims 1-7.
CN202311094583.4A 2023-08-28 2023-08-28 Control method, device, equipment and storage medium for voltage balance of multi-battery system Pending CN117134456A (en)

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