CN112671078A - Battery pack consistency control method and device, computer equipment and battery pack - Google Patents
Battery pack consistency control method and device, computer equipment and battery pack Download PDFInfo
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Abstract
The invention is suitable for the technical field of battery power supplies, and provides a method and a device for controlling consistency of a battery pack, computer equipment and the battery pack, wherein the method comprises the steps of obtaining power supply current signals of at least two acquisition chips of the battery pack, the battery pack comprises at least two battery modules which are in one-to-one correspondence with the at least two acquisition chips, and each battery module is correspondingly provided with an equalizing module; comparing the power supply current signals of the acquisition chips to determine the balance current required by each battery module; and aiming at each battery module, controlling the corresponding balancing module to perform balancing compensation on the corresponding battery module according to the balancing current. The embodiment of the application samples and compares the power supply current of a plurality of acquisition chips of the battery pack with statistics, can perform balance compensation on corresponding battery modules according to current change in real time, and improves the battery consistency of the battery pack.
Description
Technical Field
The invention belongs to the technical field of battery power supplies, and particularly relates to a method and a device for controlling consistency of a battery pack, computer equipment and the battery pack.
Background
A lithium ion battery is a rechargeable battery that operates by primarily relying on the movement of lithium ions between a positive electrode and a negative electrode. The lithium ion battery has the advantages of low self-charging rate, wide working range (working in the temperature range of-25 ℃ to 50 ℃), no memory effect, environmental friendliness, long service life and the like. The battery pack is limited by the capacity and voltage grade of the lithium ion battery cells, several hundred lithium ion battery cells are required to form the lithium ion battery pack in a series-parallel connection mode, and the battery pack has proper capacity and voltage grade to meet the use requirements, for example, sufficient power and energy are provided for a pure electric vehicle to meet the requirements of dynamic property, driving range and the like.
However, each single battery in the battery pack has inconsistency, and for the battery pack with multiple strings of numbers, all battery voltages can be collected by a plurality of collecting chips, the battery pack comprises a plurality of battery modules, each collecting chip correspondingly collects electric quantity signals of the plurality of single batteries in the battery modules, and in the scheme of the plurality of collecting chips or the modules, the power supply voltages of different collecting chips or modules are inconsistent, so that the power supply currents of the collecting chips are inconsistent, the battery is unbalanced after long-time operation, and the consistency of the battery is poor.
Disclosure of Invention
The embodiment of the invention provides a method for controlling consistency of a battery pack, and aims to solve the problem that consistency of a plurality of strings of batteries is poor.
The embodiment of the invention is realized in such a way that a method for controlling consistency of battery packs comprises the following steps:
acquiring power supply current signals of at least two acquisition chips of a battery pack, wherein the battery pack comprises at least two battery modules which correspond to the at least two acquisition chips one to one, and each battery module is correspondingly provided with an equalizing module;
comparing the power supply current signals of the acquisition chips to determine the balance current required by each battery module;
and aiming at each battery module, controlling the corresponding balancing module to perform balancing compensation on the corresponding battery module according to the balancing current.
In a second aspect, an embodiment of the present invention further provides a device for controlling consistency of battery packs, including:
the battery pack comprises at least two battery modules which are in one-to-one correspondence with the at least two acquisition chips, and each battery module is correspondingly provided with a balance module;
the current comparison unit is used for comparing the power supply current signals of the acquisition chips to determine the balance current required by each battery module;
the control information generating unit is used for calculating and generating control information of the corresponding balancing module according to the balancing current aiming at each battery module;
and the balance compensation unit is used for sending each control information to the corresponding balance module so that each balance module performs balance compensation on the corresponding battery module.
In a third aspect, the present application further provides a battery pack, where the battery pack includes a control device for controlling the consistency of the battery pack.
According to the embodiment of the invention, the power supply current signals of at least two acquisition chips of the battery pack are obtained, then the power supply current signals are compared to determine the balance current required by each battery module, and then each balance module is controlled to perform balance compensation on the corresponding battery module according to the balance current.
Drawings
FIG. 1 is a schematic flow chart diagram illustrating an embodiment of a method for controlling consistency of a battery pack according to the present application;
fig. 2 is a schematic flow chart illustrating a process of calculating an equalization current required by each battery module according to an embodiment of a method for controlling consistency of a battery pack of the present application;
FIG. 3 is a schematic flow chart illustrating equalization compensation according to an embodiment of a method for controlling consistency of a battery pack;
FIG. 4 is a schematic flow chart illustrating the generation of control information according to an embodiment of the control method for battery pack consistency according to the present application;
FIG. 5 is a schematic flow chart illustrating an embodiment of a method for controlling consistency of a battery pack according to the present application for controlling an equalization module to stop working;
fig. 6 is a schematic block diagram of an embodiment of a control device for battery pack consistency according to an embodiment of the present invention;
fig. 7 is a schematic block diagram of a current comparison unit according to an embodiment of the control device for battery pack consistency according to the embodiment of the present invention;
fig. 8 is a schematic block diagram of an embodiment of an equalization compensation unit of a control device for battery pack consistency according to an embodiment of the present invention;
fig. 9 is a schematic block diagram of a control information generating module according to an embodiment of the control device for battery pack consistency according to the embodiment of the present invention;
fig. 10 is a schematic block diagram of a control device for battery pack consistency according to another embodiment of the present invention;
fig. 11 is a schematic circuit diagram of an embodiment of a method for controlling consistency of a battery pack according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The output current of each battery module is inconsistent after current battery package uses for a long time, leads to gathering the supply current of chip inconsistent, and long-time operation then can lead to the battery unbalanced, and the battery uniformity variation. According to the embodiment of the application, the balance current required by each battery module can be determined in real time according to the change of the power supply current of the acquisition chip, so that the balance compensation is carried out on each battery module, and the battery consistency of the battery pack is improved.
Example one
In some optional embodiments, please refer to fig. 1, in which fig. 1 is a schematic flowchart of an embodiment of a method for controlling consistency of a battery pack according to the present application.
As shown in fig. 1, the present application provides a method for controlling consistency of a battery pack, comprising:
s1100, obtaining power supply current signals of at least two acquisition chips of a battery pack, wherein the battery pack comprises at least two battery modules which correspond to the at least two acquisition chips one to one, and each battery module is correspondingly provided with a balancing module;
s1200, comparing the power supply current signals of the acquisition chips to determine the balance current required by each battery module;
and S1300, aiming at each battery module, controlling the corresponding balancing module to perform balancing compensation on the corresponding battery module according to the balancing current.
In the implementation process, the battery pack comprises at least two battery modules, each battery module consists of at least one battery monomer, each battery module is correspondingly provided with an acquisition chip and a balance module, wherein, the equalizing module is used for equalizing and compensating the battery module, the collecting chip is used for collecting the electric quantity information of the battery module, including the electric quantity information of the voltage, the current, the output power and the like of the battery module, the collecting chip is powered by the battery module, in the use process of the battery pack, due to the fact that the discharge amount or the discharge rate of different battery monomers are inconsistent, loss of each battery monomer can occur in different degrees, the output of each battery module is inconsistent after the battery pack is used for a period of time, the consistency of the battery pack is poor, the power supply current signals of at least two acquisition chips are acquired, and comparing the power supply current signals to determine the balance current required by each battery module.
In some embodiments, the power supply currents of the acquisition chips may be compared to determine the power supply current with the maximum current value, and then the difference between the power supply current and the maximum current of each acquisition chip is calculated to be the balancing current required by the corresponding battery module, please refer to fig. 2, where fig. 2 is a schematic flow chart of calculating the balancing current required by each battery module according to an embodiment of the present application.
As shown in fig. 2, the step of comparing the power supply current signals of the acquisition chips to determine the balancing current required by each battery module includes the following steps:
s1210, searching a target power supply current signal with the maximum current value in each power supply current signal;
and S1220, calculating a current difference value between the target power supply current signal and each power supply current signal to be used as an equalizing current required by the corresponding battery module.
Taking a battery pack including three battery modules as an example, the battery pack includes a battery module 1, a battery module 2 and a battery module 3, wherein the battery module 1, the battery module 2 and the battery module 3 respectively correspond to the acquisition chip 1, the acquisition chip 2 and the acquisition chip 3, and the battery module 1, the battery module 2 and the battery module 3 also respectively correspond to the equalization module 1, the equalization module 2 and the equalization module 3, first obtaining a power supply current signal of each acquisition chip, for example, the power supply currents of the acquisition chip 1, the acquisition chip 2 and the acquisition chip 3 are respectively 1A (ampere times), 1.1A and 1.2A, so that it can be determined that the equalization currents required by the battery module 1, the battery module 2 and the battery module 3 are respectively 0.2A, 0.1A and 0A.
In another optional embodiment, the equalization current required by each battery module may also be determined in other manners, for example, calculating an average value of each supply current signal, and calculating the equalization current required by each battery module according to the average value and each supply current signal, or calculating the average value of each supply current as 1.1A by taking the supply currents of the acquisition chip 1, the acquisition chip 2, and the acquisition chip 3 as 1A, 1.1A, and 1.2A, respectively, and calculating the average value of each supply current as 1.1A, it may be determined that the equalization currents required by the battery module 1, the battery module 2, and the battery module 3 are 0.1A, 0A, and-0.1A, respectively, and since the equalization currents include positive and negative currents, the equalization module may be configured to include a discharging function and a discharging function, where the discharging function is to discharge the battery module, for example, 0.1A is added to the discharge of the battery module 1, and the discharging function is to perform a shunting process on, for example, an adjustable resistor is provided to shunt the battery module 3 by 0.1A.
After the balancing current required by each battery module is determined, each balancing module is respectively controlled to perform balancing compensation on the corresponding battery module according to the balancing current required by each battery module, in some embodiments, control information of each balancing module may be generated according to the balancing current required by each battery module, and then each balancing module is controlled to act according to the control information to perform balancing compensation, please refer to fig. 3, where fig. 3 is a flowchart illustrating a process of generating control information according to an embodiment of the present application.
As shown in fig. 3, the step of performing equalization compensation on each battery module by controlling the corresponding equalization module according to the equalization current includes the following steps:
s1310, calculating and generating control information of a corresponding balancing module according to the balancing current for each battery module;
and S1320, controlling the corresponding balancing module to perform balancing compensation according to the control information.
In implementation, the battery pack may be provided with a processor, and the control method for battery pack consistency provided by the present application is implemented by the processor, where the processor may be an actual processor provided in the battery pack or a virtual processor in a cloud.
Each battery module is correspondingly connected to the acquisition chip and the equalization module, please refer to fig. 11, and fig. 11 is a schematic circuit structure diagram of an embodiment of a method for controlling consistency of a battery pack according to the present application.
As shown in fig. 11, in implementation, the battery pack includes n battery modules, where n is greater than or equal to 2, includes a battery module 1 and a battery module 2 … …, each battery module includes at least one battery cell, each battery module is correspondingly provided with an acquisition chip and a balancing circuit, the acquisition chip includes an acquisition chip 1 and an acquisition chip 2 … … acquisition chip n corresponding to the battery module 1 and the battery module 2 … …, the balancing circuit includes a balancing module 1 and a balancing module 2 … … balancing module n corresponding to the battery module 1 and the battery module 2 … …, in implementation, the acquisition chip is powered by the corresponding battery module, the power supply current of the acquisition chip is sampled to obtain a power supply current signal and then sent to the controller, in order to avoid damage of a large current to the controller, the acquired power supply current information may be sent to the controller in an optical coupling isolation manner, the control information generated by the controller can also be sent to the balancing module in an optical coupling isolation mode, and the controller and each component can be isolated and protected.
When information is transmitted in an optical coupling isolation mode, because the input and the output of an optical coupler are pulse signals, the pulse signals are discrete signals, the power supply current signals acquired by collecting the power supply current of a collecting chip are analog signals, and the analog signals belong to continuous signals, the power supply current signals need to be converted into discrete digital signals and then are sent to a control chip (controller) through the optical coupler; the hall sensor method is to pass current through two ends of an element by using a hall effect, and apply a magnetic field with magnetic induction intensity B in the vertical direction of the element, namely, output voltage.
After the current is converted into the voltage, the voltage signal in the analog signal format needs to be converted into a digital signal, and in implementation, the analog signal can be converted into the digital signal by using an a/D converter, which is a circuit for implementing analog/digital conversion, for example, the voltage signal is converted into the digital signal by using a voltage frequency conversion module and then sent to a control chip in an optical coupling isolation manner. The control chip needs to convert the digital signal into a supply current signal of the acquisition chip again through digital-to-analog conversion, and in implementation, the digital signal can be converted into a voltage signal in an analog signal format through a D/A converter, the D/A converter is a circuit for realizing digital-to-analog conversion, and then the voltage signal is converted into a current signal.
The system compares the power supply current signals to determine the balance current required by each battery module, takes the battery pack comprising the battery module 1, the battery module 2 and the battery module 3 as an example, wherein the battery module 1, the battery module 2 and the battery module 3 respectively correspond to the acquisition chip 1, the acquisition chip 2 and the acquisition chip 3, the output current of the battery module 1 and the battery module 2 is 1A, and the output current of the battery module 3 is 0.9A, the system respectively samples the power supply current of the acquisition chip 1, the acquisition chip 2 and the acquisition chip 3 to obtain the power supply current of the acquisition chip 1, the acquisition chip 2 and the acquisition chip 3 which is 1A, 1A and 0.9A respectively, compares the power supply current signals to determine the balance current required by the battery module 1, the battery module 2 and the battery module 3 which is 0A, 0A and 0.1A respectively, and then calculates the control information of each balance module according to each balance current respectively, for example, if the output current of each balancing module is 1A, it is necessary to perform current compensation on the battery module 1, the battery module 2, and the battery module 3 for 0 second, and 0.1 second, respectively, so that the current signal of the battery module 3 reaches 1A, and the outputs of the battery module 1, the battery module 2, and the battery module 3 are the same.
According to the embodiment of the application, the power supply current signals of the plurality of acquisition chips of the battery pack are obtained, then the power supply current signals are compared, the balance current needed by each battery module is determined, the control information of each balance module is calculated according to the balance current and sent to each balance module, the balance compensation is conducted on the corresponding battery module by controlling each balance module, the battery pack comprises the plurality of battery modules, each battery module corresponds to the acquisition chip and the balance module, the balance current needed by each battery module can be determined according to the change of the power supply current of the acquisition chip in real time, and then the balance compensation is conducted on the battery modules by controlling the corresponding balance modules, so that the currents of the battery modules are consistent, and the battery consistency of the battery pack is improved.
Example two
In some alternative embodiments, please refer to fig. 4, and fig. 4 is a schematic flowchart illustrating a process of generating control information according to an embodiment of the present application.
As shown in fig. 4, the step of calculating and generating the control information of the corresponding balancing module according to the balancing current includes the following steps:
s1311, obtaining rated output current information of the balancing module;
and S1312, calculating the working time length information of the balancing module as control information according to the balancing current and the rated output current information.
Aiming at each battery module and the corresponding balancing module thereof, the system firstly acquires rated output current information of the balancing module, the rated output current information represents the current which can be continuously output by the balancing module for a long time under the rated environmental condition, and when the system is implemented, the rated output current information of the balancing module is stored in a local database and can be acquired by accessing the local database. Because the equalization currents required by different battery modules are different, the working time length information of the corresponding equalization module needs to be calculated according to the equalization currents required by different battery modules and the rated output current information of the equalization module as control information, for example, if the output current of the battery module 1 is 10A in 1 second and the output current of the battery module 2 is 8A in 1 second, current compensation of 2A needs to be performed on the battery module 2, when the rated output current of the equalization module is 4A/S, equalization of the battery module 1 and the battery module 2 can be achieved by controlling the equalization module to output for 0.5 second, and control information for controlling the equalization module to output for 0.5 second can be generated according to the equalization current calculation. In some optional embodiments, the control information may also adopt other manners, for example, control an output duty ratio of the balancing module or control output power of the balancing module, for example, the output current of the balancing module includes 0.1A to 10A, or the output current of the battery module 1 in 1 second is 10A, the output current of the battery module 2 in 1 second is 8A, for example, the generated control information is used for controlling the balancing module to output the output current of 2A/S, and it is sufficient to achieve uniform balancing of each battery module.
In some embodiments, the system may statistically generate the control information according to the variation of the power supply current of the plurality of acquisition chips, or take the example that the battery pack includes the battery module 1, the battery module 2, and the battery module 3, the output current of the battery module 1, the battery module 2, and the battery module 3 is 1A, the output current of the battery module 1 from the 21 st to the 23 rd second is 0.8A, the system compares the output currents of the battery module 1, the battery module 2 and the battery module 3 at the 21 st second to determine that the balance current required by the battery module 1 is 0.2A, and then generates control information to be transmitted to the balancing module 1, thereby controlling the balancing module 1 to perform 0.2A current compensation on the battery module 1 from the 21 st second to the 23 rd second, the output currents of the battery modules 1, 2 and 3 are always 1A, and the battery consistency of the battery pack is improved.
EXAMPLE III
In some alternative embodiments, please refer to fig. 5, and fig. 5 is a schematic flowchart illustrating a process of controlling the balancing module to stop working according to an embodiment of the present application.
As shown in fig. 5, after the step of performing equalization compensation on each battery module by controlling the corresponding equalization module according to the equalization current, the control method provided by the present application further includes the following steps:
s1400, obtaining equalization compensation completion information fed back by each equalization module;
and S1500, outputting preset compensation stopping control information to the corresponding equalization module according to the equalization compensation finishing information so as to stop the equalization compensation of the corresponding equalization module.
In the process of performing equalization compensation on each battery module, the compensation duration of each battery module is inconsistent, and the equalization module needs to be controlled to stop equalization compensation according to information fed back by the equalization module, taking a battery pack comprising a battery module 1, a battery module 2, a battery module 3 and a battery module 4 as an example, the battery module 1, the battery module 2, the battery module 3 and the battery module 4 correspond to the equalization module 1, the equalization module 2, the equalization module 3 and the equalization module 4, and the output currents of the battery module 1, the battery module 2, the battery module 3 and the battery module 4 are all 2A, wherein the output current of the battery module 1 is 1.8A from 10 seconds to 13 seconds, the output current of the battery module 2 is 1.8A from 10 seconds to 15 seconds, the equalization module 1 and the battery module 2 are controlled to perform 0.2A current compensation on the battery module 1 from 10 seconds, and the equalization compensation completion information is fed back to a control chip by the equalization module 1 at 13 seconds, the control chip outputs compensation stopping control information to the balancing module 1 so that the balancing module 1 stops balancing compensation, the balancing module 2 feeds back balancing compensation completion information to the control chip at the 15 th second, and the control chip outputs compensation stopping control information to the balancing module 2 so that the balancing module 2 stops balancing compensation and output currents of the battery module 1, the battery module 2, the battery module 3 and the battery module 4 are kept consistent.
Example four
In some alternative embodiments, please refer to fig. 6, fig. 6 is a schematic block diagram of a control device for battery pack compliance according to the present application.
As shown in fig. 6, the present application provides a control device for consistency of battery packs, including:
the information acquisition unit 2100 is configured to acquire power supply current signals of at least two acquisition chips of a battery pack, where the battery pack includes at least two battery modules corresponding to the at least two acquisition chips one to one, and each battery module is provided with one balancing module correspondingly;
a current comparison unit 2200, configured to compare the power supply current signals of the acquisition chips, and determine an equilibrium current required by each battery module;
and the equalization compensation unit 2300 is configured to, for each battery module, control the corresponding equalization module to perform equalization compensation on the corresponding battery module according to the equalization current.
The power supply current signals of a plurality of acquisition chips of battery package are obtained through information acquisition unit 2100, then compare each power supply current signal through current comparison unit 2200, determine the balanced current that each battery module needs, each balanced module of rethread balanced compensation unit 2300 control carries out balanced compensation to corresponding battery module, because including a plurality of battery modules in the battery package, every battery module corresponds has acquisition chip and balanced module, so can confirm the required balanced current of each battery module according to the power supply current change of acquisition chip in real time, and then control the balanced module that corresponds and carry out balanced compensation to battery module, make the electric current of each battery module reach the unanimity, improve the battery uniformity of battery package.
In some embodiments, as shown in fig. 7, the current comparison unit 2200 of the control device for battery pack consistency provided by the present application includes:
a signal traversing module 2210, configured to find a target supply current signal with a maximum current value among the supply current signals;
the current calculating module 2220 is configured to calculate a current difference between the target supply current signal and each supply current signal as an equalization current required by the corresponding battery module.
In some embodiments, as shown in fig. 8, the equalization compensation unit 2300 of the control device for battery pack consistency provided by the present application includes:
a control information generating module 2310, configured to calculate, according to the balancing current, and generate control information of a corresponding balancing module for each battery module;
and the equalization compensation control module 2320 is configured to control the corresponding equalization module to perform equalization compensation according to the control information.
In some embodiments, as shown in fig. 9, the module 2310 for generating control information of a control device for battery pack consistency provided by the present application includes:
an information obtaining module 2311, configured to obtain rated output current information of the balancing module;
the duration calculation module 2312 is configured to calculate operating duration information of the balancing module according to the balancing current and the rated output current information.
In some embodiments, as shown in fig. 10, the control device for battery pack consistency provided by the present application further includes:
an information feedback unit 2400, configured to obtain equalization compensation completion information fed back by each equalization module;
the equalization control unit 2500 is configured to output preset compensation stop control information to the corresponding equalization module according to the equalization compensation completion information, so that the corresponding equalization module stops the equalization compensation.
The implementation principle and the generated technical effect of the control device for consistency of battery packs provided by the embodiment of the invention are the same as those of the method embodiment, and for brief description, the corresponding content in the method embodiment can be referred to where the embodiment of the device is not mentioned.
EXAMPLE five
In some alternative embodiments, the present application further provides a battery pack including a control device for battery pack compliance as described above.
In implementation, the battery pack comprises at least two battery modules connected in series and/or in parallel, the battery pack with multiple strings of batteries needs a plurality of acquisition chips to acquire all battery voltages, each battery module is correspondingly provided with one acquisition chip and one balancing module, the battery pack comprises a control device for battery pack consistency, and an information acquisition unit 2100 in the control device is used for acquiring power supply current signals of the plurality of acquisition chips of the battery pack, wherein the battery pack comprises a plurality of battery modules corresponding to the plurality of acquisition chips one to one, and each battery module is correspondingly provided with one balancing module; the current comparison unit 2200 is configured to compare the power supply current signals of the acquisition chips to determine an equilibrium current required by each battery module; the equalization compensation unit 2400 is configured to, for each battery module, control the corresponding equalization module to perform equalization compensation on the corresponding battery module according to the equalization current. Because the battery pack comprises a plurality of battery modules, each battery module is correspondingly provided with the acquisition chip and the equalization module, the equalization current required by each battery module can be determined in real time according to the power supply current change of the acquisition chip, and then the corresponding equalization module is controlled to perform equalization compensation on the battery modules, so that the currents of the battery modules are consistent, and the battery consistency of the battery pack is improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (11)
1. A method for controlling consistency of a battery pack is characterized by comprising the following steps:
acquiring power supply current signals of at least two acquisition chips of a battery pack, wherein the battery pack comprises at least two battery modules which correspond to the at least two acquisition chips one to one, and each battery module is correspondingly provided with an equalizing module;
comparing the power supply current signals of the acquisition chips to determine the balance current required by each battery module;
and for each battery module, controlling the corresponding balancing module to perform balancing compensation on the corresponding battery module according to the balancing current.
2. The control method according to claim 1, wherein the step of comparing the power supply current signals of the acquisition chips to determine the balancing current required by each battery module comprises the steps of:
searching a target power supply current signal with the maximum current value in each power supply current signal;
and calculating a current difference value between the target power supply current signal and each power supply current signal to be used as the balance current required by the corresponding battery module.
3. The control method according to claim 1, wherein the step of controlling, for each battery module, the corresponding balancing module to perform balancing compensation on the corresponding battery module according to the balancing current comprises the following steps:
for each battery module, calculating according to the equalization current to generate control information of the corresponding equalization module;
and controlling a corresponding equalization module to perform equalization compensation according to the control information.
4. The control method according to claim 3, wherein the step of calculating and generating the control information of the corresponding balancing module according to the balancing current comprises the steps of:
acquiring rated output current information of the balancing module;
and calculating the working time length information of the balancing module according to the balancing current and the rated output current information.
5. The control method according to claim 1, wherein after the step of controlling, for each battery module, the corresponding balancing module to perform balancing compensation on the corresponding battery module according to the balancing current, the method further comprises the steps of:
acquiring balance compensation completion information fed back by each balance module;
and outputting preset compensation stopping control information to the corresponding equalization module according to the equalization compensation completion information so as to stop the equalization compensation of the corresponding equalization module.
6. A control device for battery pack compliance, comprising:
the battery pack comprises at least two battery modules which are in one-to-one correspondence with the at least two acquisition chips, and each battery module is correspondingly provided with an equalizing module;
the current comparison unit is used for comparing the power supply current signals of the acquisition chips to determine the balance current required by each battery module;
and the balance compensation unit is used for controlling the corresponding balance module to perform balance compensation on the corresponding battery module according to the balance current aiming at each battery module.
7. The control device of claim 6, wherein the current comparison unit comprises:
the signal traversing module is used for searching a target power supply current signal with the maximum current value in all the power supply current signals;
and the current calculation module is used for calculating a current difference value between the target power supply current signal and each power supply current signal to be used as the balance current required by the corresponding battery module.
8. The control apparatus of claim 6, wherein the equalization compensation unit comprises:
the control information generation module is used for calculating and generating control information of the corresponding equalization module according to the equalization current aiming at each battery module;
and the balance compensation control module is used for controlling the corresponding balance module to perform balance compensation according to the control information.
9. The control apparatus of claim 8, wherein the control information generation module comprises:
the information acquisition module is used for acquiring rated output current information of the balancing module;
and the duration calculation module is used for calculating the working duration information of the equalization module according to the equalization current and the rated output current information.
10. The control apparatus of claim 6, wherein the apparatus further comprises:
the information feedback unit is used for acquiring the equalization compensation completion information fed back by each equalization module;
and the equalization control unit is used for outputting preset compensation stopping control information to the corresponding equalization module according to the equalization compensation completion information so as to stop the equalization compensation of the corresponding equalization module.
11. A battery pack comprising a battery pack compliance control device as claimed in any one of claims 6 to 10.
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| CN202110079323.4A CN112671078A (en) | 2021-01-21 | 2021-01-21 | Battery pack consistency control method and device, computer equipment and battery pack |
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| CN202110079323.4A CN112671078A (en) | 2021-01-21 | 2021-01-21 | Battery pack consistency control method and device, computer equipment and battery pack |
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| CN202110079323.4A Pending CN112671078A (en) | 2021-01-21 | 2021-01-21 | Battery pack consistency control method and device, computer equipment and battery pack |
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