CN115085309A - Lithium battery balance management method, storage medium, electronic device and device - Google Patents
Lithium battery balance management method, storage medium, electronic device and device Download PDFInfo
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- CN115085309A CN115085309A CN202210588889.4A CN202210588889A CN115085309A CN 115085309 A CN115085309 A CN 115085309A CN 202210588889 A CN202210588889 A CN 202210588889A CN 115085309 A CN115085309 A CN 115085309A
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- 238000007726 management method Methods 0.000 title claims abstract description 51
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 48
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 48
- 238000007600 charging Methods 0.000 claims abstract description 33
- 238000007599 discharging Methods 0.000 claims abstract description 22
- 230000008859 change Effects 0.000 claims abstract description 21
- 230000036541 health Effects 0.000 claims abstract description 18
- 238000003745 diagnosis Methods 0.000 claims abstract description 11
- 238000004590 computer program Methods 0.000 claims description 13
- 230000004044 response Effects 0.000 claims description 7
- 238000001514 detection method Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 239000000178 monomer Substances 0.000 description 5
- 230000006870 function Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000010278 pulse charging Methods 0.000 description 3
- 238000010277 constant-current charging Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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Classifications
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- 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
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- 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
- H02J7/00302—Overcharge protection
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- 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
- H02J7/00306—Overdischarge protection
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- 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
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
- H02J7/005—Detection of state of health [SOH]
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- 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
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
- H02J7/007182—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage
Abstract
The invention provides a lithium battery equalization management method, a storage medium, an electronic device and a device, wherein the lithium battery equalization management method comprises the following steps: collecting the current of a series battery pack and the voltage of each battery in the series battery pack; identifying the current working condition of the battery according to the current of the series battery pack; responding to the condition that the working condition is a discharging state and the battery voltage is smaller than a preset over-discharge threshold value during discharging, and executing active equalization; responding to the condition that the working condition is a charging state and the battery voltage is greater than a preset overcharge threshold value during charging, and executing passive equalization; after the battery is charged, identifying the current working condition of the battery; and responding to the condition that the working condition is a standing state, detecting the change condition of the battery voltage along with the time according to a preset fixed time period, and carrying out battery health diagnosis according to the change condition. The invention also has the function of battery health detection while balancing the discharge and charge working conditions.
Description
Technical Field
The invention belongs to the technical field of battery management, relates to a battery equalization management method, and particularly relates to a lithium battery equalization management method, a storage medium, an electronic device and a device.
Background
In recent years, with the rapid development of new energy vehicles, lithium batteries have attracted much attention as an important component of new energy vehicles. A certain battery pack in the new energy vehicle is formed by connecting a plurality of single batteries in series, and along with the use of the new energy vehicle, after the lithium battery is charged and discharged for many times, differences appear among all the single battery cores in the pack, and the differences are gradually enlarged, so that the consistency among the single batteries is poor. According to the principle of the wooden barrel, the phenomenon is not beneficial to the full exertion of the capacity of the battery pack, and the thermal runaway phenomenon is possible to occur. In addition, when the series batteries are charged and discharged in the same way, the thermal power loss is different among different single batteries due to the fact that the internal resistances of the single batteries are different.
In order to improve the consistency of each single battery in the battery pack, reduce the capacity loss of the battery, and prevent the battery from being overcharged or overdischarged, the battery pack needs to be balanced. Because the internal resistances of different single batteries are different, the phenomenon of internal short circuit or thermal runaway of the batteries needs to be prevented, and therefore health diagnosis of the batteries is also needed.
However, the existing battery equalization system can only equalize one working condition of discharging or charging, and cannot equalize a plurality of batteries connected in series at the same time, nor can the existing battery equalization system perform health diagnosis on the batteries.
Therefore, how to provide a lithium battery equalization management method, a storage medium, an electronic device, and an apparatus to solve the defects that the prior art cannot perform more complete equalization and health management on a plurality of series-connected batteries is a technical problem to be solved urgently by those skilled in the art.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a method, a storage medium, an electronic device and an apparatus for balancing and managing lithium batteries, which are used to solve the problem that the prior art cannot perform more complete balancing and health management on a plurality of batteries connected in series.
In order to achieve the above and other related objects, an aspect of the present invention provides a lithium battery balancing management method, including: collecting the current of a series battery pack and the voltage of each battery in the series battery pack; identifying the current working condition of the battery according to the current of the series battery pack; responding to the condition that the working condition is a discharging state and the battery voltage is less than a preset over-discharge threshold value during discharging, and executing active equalization; responding to the condition that the working condition is a charging state and the voltage of the battery is greater than a preset overcharge threshold value during charging, and executing passive equalization; after the battery is charged, identifying the current working condition of the battery; and responding to the condition that the working condition is a standing state, detecting the change condition of the battery voltage along with the time according to a preset fixed time period, and carrying out battery health diagnosis according to the change condition.
In an embodiment of the present invention, the step of performing passive equalization includes: and responding to the charging state of the working condition and the battery voltage greater than the preset overcharge threshold, opening a passive equalization switch, connecting a passive equalization resistor to shunt the battery, and finishing passive equalization after the battery voltage reaches a first set value.
In an embodiment of the present invention, the step of performing active equalization includes: and in response to the condition that the working condition is a discharging state and the battery voltage is smaller than the preset over-discharge threshold value, the active equalization switch is turned on, the external power supply is introduced, the battery is charged through the external power supply, and the active equalization is finished when the battery voltage reaches a second set value.
In an embodiment of the present invention, the step of diagnosing the health of the battery according to the variation includes: and if a voltage platform with obvious reduction appears in the change situation, judging that the short circuit fault occurs inside the battery.
In an embodiment of the present invention, after the operating condition is determined according to the current of the series battery pack, the active equalization or the passive equalization is implemented by comparing the collected voltages of two or more batteries with the preset over-discharge threshold or the preset over-charge threshold.
To achieve the above and other related objects, another aspect of the present invention provides a computer-readable storage medium having a computer program stored thereon, where the computer program is executed by a processor to implement the lithium battery balancing management method.
To achieve the above and other related objects, a further aspect of the present invention provides an electronic device, comprising: a processor and a memory; the memory is used for storing computer programs, and the processor is used for executing the computer programs stored in the memory, so that the electronic equipment executes the lithium battery balance management method.
In order to achieve the above and other related objects, a last aspect of the present invention provides a lithium battery balancing management apparatus, including: the batteries, the electronic equipment, the active equalization circuit and the passive equalization circuit are connected in series; the electronic equipment collects the current of a series battery pack and the voltage of each battery in the series battery pack; identifying the current working condition of the battery according to the current of the series battery pack; in response to the condition that the working condition is a discharging state and the battery voltage is smaller than a preset over-discharge threshold value, starting the active equalization circuit to execute active equalization; responding to the condition that the working condition is a charging state and the battery voltage is greater than a preset overcharge threshold value, and starting the passive equalization circuit to execute passive equalization; after the battery is charged, the electronic equipment identifies the current working condition of the battery; and responding to the condition that the working condition is a standing state, detecting the change condition of the battery voltage along with the time according to a preset fixed time period, and carrying out battery health diagnosis according to the change condition.
In an embodiment of the present invention, the passive equalization circuit includes a passive equalization resistor and a passive equalization switch; the active equalization circuit comprises an external power supply and an active equalization switch; responding to the condition that the working condition is a charging state and the battery voltage is greater than the preset overcharge threshold value, turning on the passive equalization switch, and shunting the battery through the passive equalization resistor; and responding to the condition that the working condition is a discharging state and the battery voltage is less than the preset over-discharge threshold, opening the active equalization switch, introducing the external power supply, and charging the battery through the external power supply.
As described above, the lithium battery equalization management method, the storage medium, the electronic device and the apparatus according to the present invention have the following advantages:
(1) the invention adopts a mode of combining active equalization and passive equalization, and carries out passive equalization when the monomer in the battery pack is overcharged, and carries out active equalization when the monomer is overdischarged, thereby ensuring that the overcharge or overdischarge phenomenon does not occur to the battery, improving the consistency of each monomer of the battery pack, and prolonging the service life of the battery pack.
(2) The invention can realize the simultaneous equalization of up to 24 series-connected batteries.
(3) The invention adds the function of detecting the health of the battery, detects the change of the voltage along with the time when the battery is placed statically after being charged, and judges whether the internal micro short circuit occurs in the battery.
Drawings
Fig. 1 is a schematic flow chart illustrating a lithium battery equalization management method according to an embodiment of the present invention.
Fig. 2 is a flowchart illustrating a lithium battery equalization management method according to an embodiment of the present invention.
Fig. 3 is a circuit diagram illustrating a plurality of series-connected battery equalization circuits in an embodiment of the lithium battery equalization management method of the present invention.
Fig. 4 is a schematic structural connection diagram of an electronic device according to an embodiment of the invention.
Fig. 5 is a schematic structural diagram of a lithium battery equalization management device according to an embodiment of the present invention.
Description of the element reference numerals
1 electronic device
11 processor
12 memory
2 passive equalization circuit
3 active equalization circuit
S11-S16
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the drawings only show the components related to the present invention rather than the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated.
The lithium battery equalization management method, the storage medium, the electronic equipment and the device provided by the invention have the function of battery health detection while equalizing the discharge and charge working conditions.
The principle and implementation of the lithium battery balancing management method, the storage medium, the electronic device and the apparatus of the present embodiment will be described in detail below with reference to fig. 1 to 5, so that those skilled in the art can understand the lithium battery balancing management method, the storage medium, the electronic device and the apparatus of the present embodiment without creative work.
Fig. 1 shows a schematic flow chart of a lithium battery equalization management method according to an embodiment of the present invention. As shown in fig. 1, the lithium battery equalization management method specifically includes the following steps:
and S11, collecting the current of the series battery pack and the voltage of each battery in the series battery pack.
Specifically, the voltage of the battery is acquired by a voltage sampling circuit connected to each battery, and the current of the series battery is acquired by a current sampling circuit connected to the battery.
And S12, identifying the current working condition of the battery according to the current of the series battery pack.
Specifically, the operating condition includes one of a charged state, a discharged state, or a rest state.
In another embodiment, the present invention can also identify the current working condition of the battery according to the voltage variation. For example, if the voltage is 3.3V for the first 1min and 3.4V for the second 1min, the current working condition is identified as the charging state).
S13, in response to the condition that the battery is in a discharge state and the battery voltage is smaller than a preset over-discharge threshold value, executing active equalization; and responding to the condition that the working condition is a charging state and the battery voltage is greater than a preset overcharge threshold value, and executing passive equalization.
In one embodiment, the step of performing passive equalization includes:
and responding to the charging state of the working condition and the battery voltage greater than the preset overcharge threshold, opening a passive equalization switch, connecting a passive equalization resistor to shunt the battery, and finishing passive equalization after the battery voltage reaches a first set value.
In one embodiment, the step of performing active equalization includes:
and in response to the condition that the working condition is a discharging state and the battery voltage is smaller than the preset over-discharge threshold value, the active equalization switch is turned on, the external power supply is introduced, the battery is charged through the external power supply, and the active equalization is finished when the battery voltage reaches a second set value.
And S14, after the battery is charged, identifying the current working condition of the battery.
And S15, responding to the condition that the working condition is a standing state, and detecting the change condition of the battery voltage along with time according to a preset fixed time period.
And S16, performing battery health diagnosis according to the change situation.
In one embodiment, the step of performing the battery health diagnosis according to the variation includes: and if the voltage platform drops in the change situation, judging that the short circuit fault occurs in the battery.
In one embodiment, after the working condition is determined according to the current of the series battery pack, the acquired voltages of more than two batteries are compared with the preset over-discharge threshold or the preset over-charge threshold, so as to realize active equalization or passive equalization. Therefore, the invention can carry out voltage acquisition and balance management control on up to 24 series batteries at the same time. The invention can avoid the overcharge or the overdischarge of the battery, and the service life of the battery pack is improved by balancing the voltage of each single body to be at the same level.
The aim of management of the invention is to keep the voltage of the single body at the same level no matter whether the voltage is actively balanced or passively balanced. The battery with more charge, namely high voltage, is passively discharged in an equalizing way, and the like. The battery with low voltage is discharged quickly, and the power is supplemented by the power supply, so that the battery with high voltage is ensured to be at the same level with other batteries with high voltage.
Fig. 2 shows a working flow chart of the lithium battery equalization management method according to an embodiment of the present invention. As shown in fig. 2, in practical application, the lithium battery equalization management method of the present invention is implemented as follows:
(1) and burning the corresponding codes of the modules onto a circuit board with balanced functions and the like, and connecting the 24 series-connected battery packs with the circuit board after ensuring that the circuit board can work normally.
(2) And selecting proper multiplying power to charge the batteries according to the battery pack, detecting the voltage of each single battery, judging the working condition, if the charging is carried out, opening a passive equalization switch corresponding to each battery when the battery with the single voltage larger than an overcharge threshold value is detected, and realizing shunting by utilizing a passive equalization resistor. And when the voltage of the battery stably reaches a set value, the balance switch is closed to finish passive balance.
(3) When the batteries are placed statically after being charged, the device detects the voltage of each series battery in a fixed short time, and analyzes whether micro short circuit occurs in the batteries according to the calculated voltage change delta V/delta t. If a battery is found to have a significant voltage drop plateau, it indicates that there may be an internal short circuit inside the battery, which needs to be maintained or replaced.
(4) And discharging the battery according to a proper multiplying power selected by the battery pack, detecting the voltage of each single battery, judging the working condition, if the battery is discharged, and when the battery with the single voltage smaller than an over-discharge threshold value is detected, opening an active equalization switch of the battery, and introducing an external power supply to additionally charge the battery.
Fig. 3 is a diagram of a balancing circuit for multiple batteries connected in series according to an embodiment of the balancing management method for lithium batteries of the present invention. As shown in fig. 3, Ci represents a charging switch, i.e., an active equalization switch, connected to an external charging power supply, and i is an arbitrary number between 1 and m; di is a discharge switch, namely a passive equalization switch, is connected with a shunt resistor, namely a passive equalization resistor, and i is any number between 1 and m. Pi is connected to the battery (node 1 between P0 and P1, and so on), and m is 24.
With reference to fig. 3, the specific process of passive equalization is: in the charging process, if the voltage of a certain monomer is detected to be larger than a set overcharge threshold value, the battery passive equalization switch is turned on, and the battery is shunted by the passive equalization resistor. The charging current of the battery becomes small after the current is shunted, so that the equalization effect is achieved, and the equalization switch is closed after the voltage of the battery stably reaches a set value. And if the voltages of the plurality of batteries are detected to be larger than the overcharge threshold value, the corresponding passive equalization switches are correspondingly started, and the passive equalization of 24 batteries can be started at most simultaneously.
With reference to fig. 3, the specific process of active equalization is: in the discharging process, if the voltage of a certain monomer is detected to be smaller than a set over-discharge threshold value, the active equalization switch of the battery is turned on, an external power supply is introduced to carry out complementary charging on the battery, and the equalization switch is turned off until the voltage is stable to reach a set value. The balancing method can effectively maintain the battery and prolong the service life of the battery. Similarly, active equalization of up to 24 cells can be turned on simultaneously.
The protection scope of the lithium battery equalization management method of the present invention is not limited to the execution sequence of the steps listed in this embodiment, and all the schemes of adding, subtracting, and replacing the steps in the prior art according to the principle of the present invention are included in the protection scope of the present invention.
The present embodiment provides a computer-readable storage medium, on which a computer program is stored, which, when executed by a processor, implements the lithium battery equalization management method.
Those of ordinary skill in the art will understand that: all or part of the steps for implementing the above method embodiments may be performed by hardware associated with a computer program. The aforementioned computer program may be stored in a computer readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned computer-readable storage media comprise: various computer storage media that can store program codes, such as ROM, RAM, magnetic or optical disks.
Please refer to fig. 4, which is a schematic structural connection diagram of an electronic device according to an embodiment of the present invention. As shown in fig. 4, the present embodiment provides an electronic device 1, which specifically includes: a processor 11 and a memory 12; the memory 12 is configured to store a computer program, and the processor 11 is configured to execute the computer program stored in the memory 12, so that the electronic device 1 executes the steps of the lithium battery balancing management method.
The Processor 11 may be a general-purpose Processor, and includes a Central Processing Unit (CPU), a Network Processor (NP), and the like; the Integrated Circuit may also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete gate or transistor logic device, discrete hardware component.
The Memory 12 may include a Random Access Memory (RAM), and may further include a non-volatile Memory (non-volatile Memory), such as at least one disk Memory.
Fig. 5 is a schematic structural diagram of a lithium battery equalization management device according to an embodiment of the present invention. As shown in fig. 5, the lithium battery equalization management device includes: the battery, the electronic equipment 1, the active equalization circuit 2 and the passive equalization circuit 3 are connected in series. In practical application, the electronic device is an MCU (micro controller Unit, micro control Unit or single chip microcomputer) and is used for collecting and analyzing the current of the battery pack and the voltage of the battery.
The electronic equipment 1 collects the current of a series battery pack and the voltage of each battery in the series battery pack; and identifying the current working condition of the battery according to the current of the series battery pack.
In response to the condition that the working condition is a discharging state and the battery voltage is smaller than a preset over-discharge threshold value during discharging, starting the active equalization circuit 3 to execute active equalization; and in response to the condition that the working condition is a charging state and the battery voltage is greater than a preset overcharge threshold value during charging, starting the passive equalization circuit 2 to execute passive equalization.
After the battery is charged, the electronic equipment identifies the current working condition of the battery; and responding to the condition that the working condition is a standing state, detecting the change condition of the battery voltage along with the time according to a preset fixed time period, and carrying out battery health diagnosis according to the change condition.
In one embodiment, the passive equalization circuit includes a passive equalization resistor and a passive equalization switch; the active equalization circuit includes an external power source and an active equalization switch.
And responding to the condition that the working condition is a charging state, and when the battery voltage is greater than the preset overcharge threshold value during charging, turning on the passive equalization switch, and shunting the battery through the passive equalization resistor.
And responding to the condition that the working condition is a discharging state, and when the battery voltage is smaller than the preset over-discharge threshold value during discharging, opening the active equalization switch, introducing the external power supply, and charging the battery through the external power supply.
In one practical application, active equalization employs constant current charging. In another practical application, active equalization employs pulse charging, which includes three phases: pre-charging, constant current charging and pulse charging. In the pulse charging stage, the polarization internal resistance of the battery in the current alternation period is obviously reduced, and the accumulation of polarization voltage can be relieved, so that the battery is improved.
The principle of the lithium battery equalization management device provided by the invention corresponds to the lithium battery equalization management method one by one, and the lithium battery equalization management device provided by the invention can realize the lithium battery equalization management method provided by the invention, but the realization device of the lithium battery equalization management method provided by the invention comprises but is not limited to the structure of the lithium battery equalization management device listed in the embodiment, and all structural deformation and replacement in the prior art according to the principle of the invention are included in the protection scope of the invention.
In summary, the lithium battery equalization management method, the storage medium, the electronic device and the apparatus of the present invention adopt a combination of active equalization and passive equalization to equalize the discharge and charge conditions. When the battery is discharged, the active equalization is used for protecting the battery from over-discharge, and when the battery is charged, the passive equalization is used for preventing the battery from over-charge. It is possible to achieve equalization of up to 24 cells in series simultaneously. And a battery health detection function is added, and when the battery is placed after being charged, the change of voltage along with time is detected, and whether the internal micro short circuit occurs in the battery is judged. The invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (9)
1. A lithium battery equalization management method is characterized by comprising the following steps:
collecting the current of a series battery pack and the voltage of each battery in the series battery pack;
identifying the current working condition of the battery according to the current of the series battery pack;
responding to the condition that the working condition is a discharging state and the battery voltage is smaller than a preset over-discharge threshold value during discharging, and executing active equalization; responding to the condition that the working condition is a charging state and the battery voltage is greater than a preset overcharge threshold value during charging, and executing passive equalization;
after the battery is charged, identifying the current working condition of the battery;
and responding to the condition that the working condition is a standing state, detecting the change condition of the battery voltage along with the time according to a preset fixed time period, and carrying out battery health diagnosis according to the change condition.
2. The lithium battery equalization management method of claim 1, wherein the step of performing passive equalization comprises:
and responding to the condition that the working condition is a charging state, and when the battery voltage is greater than the preset overcharge threshold value during charging, turning on a passive equalization switch, accessing a passive equalization resistor to shunt the battery, and finishing passive equalization when the battery voltage reaches a first set value.
3. The lithium battery equalization management method of claim 1, wherein the step of performing active equalization comprises:
and in response to the condition that the working condition is a discharging state and the battery voltage is smaller than the preset over-discharge threshold value, the active equalization switch is turned on, the external power supply is introduced, the battery is charged through the external power supply, and the active equalization is finished when the battery voltage reaches a second set value.
4. The lithium battery equalization management method according to claim 1, wherein the step of performing battery health diagnosis according to the variation includes:
and if the voltage platform drops in the change situation, judging that the short circuit fault occurs in the battery.
5. The lithium battery equalization management method of claim 1, wherein: and after the working condition is determined according to the current of the series battery pack, comparing the collected more than two battery voltages with the preset over-discharge threshold value or the preset over-charge threshold value so as to realize active equalization or passive equalization.
6. A computer-readable storage medium, on which a computer program is stored, wherein the computer program, when executed by a processor, implements the lithium battery equalization management method according to any one of claims 1 to 5.
7. An electronic device, comprising: a processor and a memory;
the memory is used for storing computer programs, and the processor is used for executing the computer programs stored by the memory so as to enable the electronic equipment to execute the lithium battery equalization management method according to any one of claims 1 to 5.
8. The utility model provides a lithium battery balance management device which characterized in that, lithium battery balance management device includes: a series of grouped cells, the electronic device of claim 7, an active equalization circuit, and a passive equalization circuit;
the electronic equipment collects the current of a series battery pack and the voltage of each battery in the series battery pack; identifying the current working condition of the battery according to the current of the series battery pack;
responding to the condition that the working condition is a discharging state and the battery voltage is smaller than a preset over-discharge threshold value during discharging, and starting the active equalization circuit to execute active equalization; responding to the condition that the working condition is a charging state and the battery voltage is greater than a preset overcharge threshold value during charging, and starting the passive equalization circuit to execute passive equalization;
after the battery is charged, the electronic equipment identifies the current working condition of the battery; and responding to the condition that the working condition is a standing state, detecting the change condition of the battery voltage along with the time according to a preset fixed time period, and carrying out battery health diagnosis according to the change condition.
9. The lithium battery equalization management device according to claim 8, wherein: the passive equalization circuit comprises a passive equalization resistor and a passive equalization switch; the active equalization circuit comprises an external power supply and an active equalization switch;
responding to the condition that the working condition is a charging state and the battery voltage is greater than the preset overcharge threshold value during charging, turning on the passive equalization switch, and shunting the battery through the passive equalization resistor;
and responding to the condition that the working condition is a discharging state, and when the battery voltage is smaller than the preset over-discharge threshold value during discharging, opening the active equalization switch, introducing the external power supply, and charging the battery through the external power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210588889.4A CN115085309A (en) | 2022-05-26 | 2022-05-26 | Lithium battery balance management method, storage medium, electronic device and device |
Applications Claiming Priority (1)
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104135047A (en) * | 2014-07-16 | 2014-11-05 | 国家电网公司 | Active and passive synergic hybrid equalization circuit of series storage battery pack, and equalization method |
| CN107359662A (en) * | 2017-08-01 | 2017-11-17 | 华南理工大学 | A kind of battery management system and equalization methods with parallel equalization function |
| CN112433162A (en) * | 2020-10-26 | 2021-03-02 | 惠州市豪鹏科技有限公司 | Lithium ion battery aging method |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104135047A (en) * | 2014-07-16 | 2014-11-05 | 国家电网公司 | Active and passive synergic hybrid equalization circuit of series storage battery pack, and equalization method |
| CN107359662A (en) * | 2017-08-01 | 2017-11-17 | 华南理工大学 | A kind of battery management system and equalization methods with parallel equalization function |
| CN112433162A (en) * | 2020-10-26 | 2021-03-02 | 惠州市豪鹏科技有限公司 | Lithium ion battery aging method |
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