WO2019042416A1 - Procédé et système d'égalisation de batterie, véhicule et dispositif électronique - Google Patents

Procédé et système d'égalisation de batterie, véhicule et dispositif électronique Download PDF

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Publication number
WO2019042416A1
WO2019042416A1 PCT/CN2018/103537 CN2018103537W WO2019042416A1 WO 2019042416 A1 WO2019042416 A1 WO 2019042416A1 CN 2018103537 W CN2018103537 W CN 2018103537W WO 2019042416 A1 WO2019042416 A1 WO 2019042416A1
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Prior art keywords
battery
equalization
equalized
target
target parameter
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PCT/CN2018/103537
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English (en)
Chinese (zh)
Inventor
罗红斌
王超
沈晓峰
曾求勇
刘苑红
张祥
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比亚迪股份有限公司
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Publication of WO2019042416A1 publication Critical patent/WO2019042416A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
    • B60L58/20—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules having different nominal voltages
    • 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

Definitions

  • the present application relates to the field of battery management technologies, and in particular, to a battery equalization method, system, vehicle, and electronic device.
  • Power battery packs are an important part of electric vehicles. With the use of the power battery pack, the difference between the individual cells in the power battery pack is gradually enlarged, resulting in poor consistency between the individual cells. Due to the "short board effect" of the power battery pack, the capacity of the power battery pack is limited, resulting in a decrease in the overall capacity of the power battery pack. Therefore, it is necessary to effectively balance the management of the single cells in the power battery pack, so that the capacity of each unit battery is kept consistent, so as to reduce the capacity loss of the power battery pack, prolong the service life of each unit battery and continue the electric vehicle. Driving mileage.
  • the equalization time required for the unit cells to be equalized is generally determined according to the difference in capacity of each unit battery in the power battery pack, and the equalization unit is equalized according to the equalization period.
  • battery capacity is a variable that characterizes the internal characteristics of the battery. Its size is difficult to measure. Its accurate measurement method needs to be measured in a laboratory for discharge experiments.
  • the purpose of the present application is to provide a battery equalization method, system, vehicle, and electronic device to quickly and efficiently obtain the equalization time required for a single cell to be balanced, and optimize the battery equalization process.
  • a battery equalization method includes: acquiring target parameter information of a battery to be equalized in a battery pack; acquiring historical equalization duration and historical parameter information of the to-equalized single battery,
  • the historical parameter information is the historical information of the target parameter information; and the target equalization time required for the current equalization of the to-be-equalized unit cells is determined according to the target parameter information, the historical equalization duration, and the historical parameter information. And controlling the equalization of the cells to be equalized according to the target equalization duration.
  • the target parameter information includes: a difference value of the target parameter; and the step of acquiring the target parameter information of the unit battery to be equalized includes: acquiring target parameters of each single battery in the power battery group,
  • the target parameter includes any one of the following parameters: voltage, SOC, internal resistance, self-discharge rate, voltage change rate, power change rate, and time change rate; according to the target parameters of the respective single cells, Determining a reference value of the target parameter; obtaining a difference value of the target parameter according to the target parameter of the unit cell to be equalized and the reference value.
  • the target parameter information further includes: an available capacity of the battery to be equalized; the step of acquiring target parameter information of the battery to be equalized includes: acquiring battery information of the battery to be equalized, the battery The information includes at least: a voltage value, a current value, and a temperature value; and the available capacity of the battery to be equalized is obtained according to the battery information of the battery to be equalized.
  • the determining, according to the target parameter information, the historical equalization duration, and the historical parameter information, the step of determining a target equalization duration of the to-be-equalized unit battery includes:
  • the target equalization duration is determined using the following formula:
  • t k is the target equalization duration
  • t k-1 is the historical equalization duration of the last equalization of the to-be-equalized unit cells
  • ⁇ S k is the current time, the target parameters of the unit cells to be equalized and the The difference between the reference values of the target parameters
  • ⁇ S k-1 is the difference between the target parameter of the cell to be equalized and the reference value of the target parameter
  • C k is the current time The current available capacity of the unit battery to be equalized
  • C k-1 is the last equalization time, and the historical available capacity of the unit battery to be equalized.
  • the method further includes determining, according to a target parameter of each single battery in the battery group, the to-equalize unit battery, wherein the target parameter includes: voltage, SOC At least one of internal resistance, self-discharge rate, voltage change rate, power change rate, and time change rate.
  • the target parameter includes: voltage, SOC At least one of internal resistance, self-discharge rate, voltage change rate, power change rate, and time change rate.
  • a battery equalization system includes: an equalization module, an acquisition module, and a control module; and the acquisition module is configured to collect each of the power battery groups under the control of the control module.
  • the battery module information of the single battery; the control module is configured to obtain target parameter information of the battery to be equalized in the battery group according to the battery information of each of the single cells collected by the collecting module; and obtain the to-be-balanced single
  • the historical equalization time and the historical parameter information of the body battery wherein the historical parameter information is historical information of the target parameter information; determining the to-be-balanced according to the target parameter information, the historical equalization duration, and the historical parameter information
  • the target equalization time required for the current cell balancing; controlling the equalization of the cells to be equalized according to the target equalization time; the equalization module is configured to correspond to the control module under the control The cells are balanced.
  • the target parameter information includes: a difference value of the target parameter; the control module is configured to acquire a target parameter of each single battery in the power battery group, where the target parameter includes the following parameters Any one of: voltage, SOC, internal resistance, self-discharge rate, voltage change rate, power change rate, and time change rate; determining a reference value of the target parameter according to the target parameter of each of the single cells; The target parameter of the unit cell is equalized with the reference value, and the difference of the target parameter is obtained.
  • the target parameter information further includes: an available capacity of the battery to be equalized; the control module is configured to acquire battery information of the battery to be equalized, and the battery information includes at least: a voltage value and a current value. And a temperature value; obtaining the available capacity of the battery to be equalized according to the battery information of the battery to be equalized.
  • control module is configured to determine the target equalization duration by using the following formula:
  • t k is the target equalization duration
  • t k-1 is the historical equalization duration of the last equalization of the to-be-equalized unit cells
  • ⁇ S k is the current time, the target parameters of the unit cells to be equalized and the The difference between the reference values of the target parameters
  • ⁇ S k-1 is the difference between the target parameter of the cell to be equalized and the reference value of the target parameter
  • C k is the current time, The current available capacity of the unit battery to be equalized
  • C k-1 is the last equalization time, and the historical available capacity of the unit battery to be equalized.
  • control module is further configured to determine, according to a target parameter of each unit battery in the battery group, the unit to be equalized from the battery group, wherein the target parameter comprises: a voltage At least one of SOC, internal resistance, self-discharge rate, voltage change rate, power change rate, and time change rate.
  • control module is connected to the acquisition module and the equalization module corresponding to the same single cell through a channel, and the acquisition module and the equalization module time-multiplex the channels.
  • control module includes a control chip, and the control chip is connected to an acquisition module and an equalization module corresponding to the same single cell through a pin, and the pin passes through the channel and the equalization module and the The acquisition module is connected.
  • control module is respectively connected to the acquisition module and the equalization module corresponding to the same single cell through two channels.
  • control module includes a control chip, and the control chip is respectively connected to an acquisition module and an equalization module corresponding to the same single cell through two pins, and the two pins are connected to the two channels.
  • the control chip is respectively connected to an acquisition module and an equalization module corresponding to the same single cell through two pins, and the two pins are connected to the two channels.
  • one of the two pins is connected to the equalization module through one of the two channels, and the other of the two pins passes through the two channels Another channel is connected to the acquisition module.
  • a vehicle comprising the battery equalization system provided by the second aspect of the embodiments of the present application.
  • a computer readable storage medium having stored thereon computer program instructions, the program instructions being executed by a processor, the battery equalization method provided by the first aspect of the embodiments of the present application.
  • an electronic device comprising: the computer readable storage medium provided by the fourth aspect of the embodiments of the present application; and one or more processors for executing the computer readable A program in a storage medium.
  • the target equalization time required for the current equalization of the cells to be equalized is determined according to the obtained target parameter information, the historical equalization duration, and the historical parameter information of the unit cell to be equalized, so that the balance to be balanced can be conveniently and quickly obtained.
  • This method is directly effective when the target cell balance time is long.
  • FIG. 1 is a structural block diagram of a battery equalization system according to an exemplary embodiment
  • FIG. 2 is a flow chart showing a battery equalization method according to an exemplary embodiment
  • FIG. 3 is a flowchart of a method for acquiring target parameter information according to an exemplary embodiment
  • FIG. 4 is a flow chart of a battery equalization method illustrated in accordance with an exemplary real time
  • FIG. 5 is a flowchart of a battery equalization method according to another exemplary embodiment
  • FIG. 6 is a block diagram of a battery equalization system, according to an exemplary embodiment
  • FIG. 7 is a block diagram of a battery equalization system, according to another exemplary illustration.
  • FIG. 1 is a structural block diagram of a battery equalization system according to an exemplary embodiment.
  • the battery equalization system 10 includes a battery pack 11 , an acquisition module 12 , an equalization module 13 , and a control module 14 .
  • the battery pack 11 includes a plurality of unit cells connected in series.
  • the collecting module 12 collects the battery information of each single battery in the battery pack 11 and sends the collected battery information of each single battery to the control module 14.
  • the battery information of each unit battery may include, for example, but not limited to, information such as voltage, current, temperature, and the like of each unit battery.
  • the control module 14 determines, according to the battery information of each unit battery, whether there is a cell to be equalized that needs to be equalized in the battery pack 11, and after determining the cell to be equalized, outputs corresponding information according to the battery information of the cell to be equalized.
  • the control signal is sent to the equalization module 13, and the control equalization module 13 performs equalization processing on the equalized cells.
  • FIG. 2 is a flow chart showing a battery equalization method according to an exemplary embodiment. As shown in FIG. 2, the battery equalization method includes the following steps:
  • step S21 target parameter information of the unit cells to be equalized in the battery pack is acquired.
  • the target parameter information includes a difference value of the target parameters.
  • the above step S21 may include the following steps:
  • step S211 target parameter information of the unit cell to be equalized is obtained, wherein the target parameter includes any one of the following parameters: voltage, SOC, internal resistance, self-discharge rate, voltage change rate, power change rate, and time change. rate.
  • the self-discharge rate of the single cell refers to the ability of the stored battery to maintain the power under certain conditions in an open state (ie, stop charging or stop discharging).
  • the self-discharge rate of a single cell is an important parameter for characterizing the characteristics of a single cell, and can effectively characterize the capacity loss and capacity loss rate of a single cell.
  • the voltage change rate of the single cell refers to the voltage change rate of the single cell during charging (or discharging), that is, the voltage change rate of the single cell can be the voltage change when the specified physical quantity of the single cell changes.
  • a predetermined amount of electric power is injected or discharged to a single battery, and a voltage variation amount dv/dq of the single battery; or a preset length of charging or discharging the single battery, a voltage variation amount of the single battery dv /dt is an example for explanation.
  • the rate of change in the amount of electricity of the unit cell may be the amount of change in voltage when the unit of the specified physical quantity of the unit cell changes.
  • the amount of electric power required to increase the voltage of the unit cell by one unit voltage from the initial voltage, or the amount of decrease in the voltage of the unit cell from the initial voltage by one unit voltage will be described as an example.
  • the time rate of change of the unit cells may be the length of time required for the unit of the specified physical quantity of the unit cells to change.
  • the charging time required for the voltage of the unit cell to rise by one unit voltage from the initial voltage or the discharge time required for the voltage of the unit cell to decrease by one unit voltage from the initial voltage will be described as an example.
  • the target parameters of each of the single cells may be determined according to the collected battery information of each of the single cells.
  • the battery information of each unit battery may include, for example, but not limited to, information such as voltage, current, temperature, and the like of each unit battery.
  • step S212 a reference value of the target parameter is determined according to the target parameter of each of the individual cells.
  • the target parameter of any of the battery cells in the battery pack can be used as a reference value for the target parameter.
  • the target parameter may also be calculated based on target parameters of each of the individual cells in the battery pack.
  • the reference value of the target parameter is the minimum value, the maximum value, the average value, or the median value of the target parameters of the individual cells in the battery pack, and the like.
  • step S213 the difference between the target parameters is obtained according to the target parameter of the unit cell to be equalized and the reference value.
  • the difference between the target parameter of the unit cell to be equalized and the reference value may be used as the difference of the target parameter.
  • the SOC value of each unit battery can be obtained according to the battery information of each unit battery collected at the current time, and the minimum SOC value SOC min is used as a reference value. Thereby, the difference ⁇ SOC k between the SOC value of the cell to be balanced at the current time and the reference value can be obtained.
  • the target parameter further includes: an available capacity of the unit battery to be equalized.
  • the available capacity of the cell to be balanced can be determined according to the battery information of the cell to be balanced.
  • step S22 the historical equalization duration and historical parameter information of the unit cells to be equalized are obtained, wherein the historical parameter information is historical information of the target parameter information.
  • the equalization time and target parameters of the equalized cells to be balanced are recorded, and the average time and target parameters of each cell are compared with each equalization. Storage, thereby obtaining the historical equalization duration and historical parameter information of the equalized cell to be equalized.
  • the historical equalization duration may be the equalization period of the equalization of the cell to be balanced.
  • the historical parameter information may include target parameter information of the last equalization time of the to-be-equalized unit battery, for example, the difference between the target parameters including the equalization time of the single-cell equalization cell, and the single cell to be equalized last time. The available capacity at equilibrium time.
  • the historical equalization duration may also be an average value of the equalization duration of the equalization of the cells to be balanced each time before the current equalization.
  • the historical parameter may also include an average value of the target parameter differences of the to-equalized cells at each equalization time before the current equalization, and an average of the available capacities of the cells to be equalized at each equilibrium time before the equalization. Values and the like, this application does not limit this.
  • step S23 the target equalization time required for the current equalization of the cells to be equalized is determined according to the target parameter information, the historical equalization duration, and the historical parameter information.
  • the target equalization duration can be determined by the following formula (1).
  • t k is the target equalization time required for the current equalization of the cell to be equalized
  • t k-1 is the historical equilibrium time of the last equalization of the cell to be equalized
  • ⁇ S k is the current time, the monomer to be equalized The difference between the target parameter of the battery and the reference value of the target parameter
  • ⁇ S k-1 is the difference between the target parameter of the cell to be equalized and the reference value of the target parameter
  • C k For the current time, the current available capacity of the unit battery to be balanced
  • C k-1 is the last equalization time, the historical available capacity of the unit battery to be equalized.
  • step S24 the equalization of the cells to be equalized is controlled according to the target equalization time.
  • the equalization cell After determining the target equalization time required for the equalization of the cell to be equalized, the equalization cell can be equalized according to the target equalization time. According to different ways of obtaining the reference value of the target parameter, the equalization process of the equalized single cell can be performed in different ways.
  • the equalization battery may be equalized by passive equalization, that is, the cell to be equalized is discharged, for example, set and balanced in the equalization module.
  • the parallel resistance of the single cells reduces the difference between the target parameters of the cells to be equalized and the reference value to a preset range, and achieves the effect of equalizing the individual cells in the battery pack.
  • the equalization process of the equalized cell may be performed by an active equalization method, that is, the battery to be equalized is charged, for example, a power supply component is set in the equalization module. (such as a generator or a battery), the difference between the target parameter of the unit cell to be equalized and the reference value is reduced to a preset range, and the effect of equalizing each unit cell in the battery pack is achieved.
  • an active equalization method that is, the battery to be equalized is charged, for example, a power supply component is set in the equalization module. (such as a generator or a battery), the difference between the target parameter of the unit cell to be equalized and the reference value is reduced to a preset range, and the effect of equalizing each unit cell in the battery pack is achieved.
  • Method 3 The combination of active and passive equalization.
  • the unit cell whose target parameter is smaller than the reference value may be subjected to equalization processing in an active equalization manner, and the target parameter is greater than the reference value.
  • the single cell is balanced by a passive equalization method, so that the difference between the target parameter and the reference value of the cell to be balanced is reduced to a preset range, and the effect of equalizing each cell in the battery pack is achieved.
  • the target equalization time required for the current equalization of the cells to be equalized is determined according to the obtained target parameter information, the historical equalization duration, and the historical parameter information of the unit cell to be equalized, so that the balance to be balanced can be conveniently and quickly obtained.
  • This method is directly effective when the target cell balance time is long.
  • the acquisition module detects and records battery information such as voltage, current, temperature, and the like of each unit battery; the control module determines the SOC value of each unit battery according to the battery information, and obtains the SOC value of each unit battery.
  • the minimum SOC value (reference value of the target parameter); then, the control module determines the difference ⁇ SOC k (the difference between the target parameters) of the SOC value of each unit cell of the current equalization and the minimum SOC value, and reads the unit to be equalized
  • the control module calculates the target equalization duration, the equalization of the cells to be equalized can be controlled according to the target equalization duration.
  • FIG. 5 is a flow chart showing a battery equalization method according to an exemplary embodiment. As shown in FIG. 5, the battery equalization method includes the following steps:
  • step S51 the unit cells to be equalized are determined from the battery group according to the target parameters of the individual cells in the battery pack, wherein the target parameters include: voltage, SOC, internal resistance, self-discharge rate, voltage change rate, and power amount. At least one of a rate of change and a rate of change in time.
  • the collecting module can detect and record the battery information of each single battery in the battery pack and send it to the control module, wherein the battery information can include, for example but not limited to: each single battery Voltage, current, temperature and other information.
  • the control module can determine the target parameters of each unit battery according to the battery information of each unit battery, and determine the unit cells to be equalized in the battery group according to the target parameters of each unit battery.
  • the process of determining the cells to be equalized in the battery pack will be described by taking the target parameter including the SOC as an example.
  • the control module can obtain the SOC value of each single battery according to the battery information of each unit battery sent by the collection module, and obtain the minimum SOC value in each unit battery, thereby obtaining the SOC value and the minimum SOC value of each unit battery.
  • the difference is compared and the resulting difference is compared to the minimum SOC value to determine the cells to be equalized in the battery pack. For example, if the difference between the SOC value and the minimum SOC value of the single battery is greater than or equal to the preset SOC difference threshold, it is determined that the single battery is a single battery to be equalized; if the SOC value of the single battery is the smallest If the difference between the SOC values is less than the preset SOC difference threshold, it is determined that the single cell does not need to be equalized.
  • the cell to be equalized may be determined by at least one of a voltage, an internal resistance, a self-discharge rate, a voltage change rate, a power change rate, and a time change rate of each of the single cells, and details are not described herein again.
  • step S52 target parameter information of the unit cells to be equalized in the battery pack is acquired.
  • step S53 the historical equalization duration and the historical parameter information of the unit cell to be equalized are obtained, wherein the historical parameter information is historical information of the target parameter information.
  • step S54 the target equalization time required for the current equalization of the cells to be equalized is determined according to the target parameter information, the historical equalization duration, and the historical parameter information.
  • step S55 the equalization of the cells to be equalized is controlled according to the target equalization duration.
  • FIG. 6 is a block diagram of a battery equalization system, according to an exemplary embodiment
  • FIG. 7 is a block diagram of a battery equalization system according to another exemplary illustration.
  • the battery equalization system 60 includes a battery pack 61, an acquisition module 62, an equalization module 63, and a control module 64.
  • the battery pack 61 includes a plurality of battery cells 611 connected in series.
  • control module 64 is connected to the acquisition module 62 and the equalization module 63 corresponding to the same unit cell 611 through a channel 610, and the acquisition module 62 and the equalization module 63 time-multiplex the Channel 610.
  • control module 64 includes a control chip that is coupled to the acquisition module 62 and the equalization module 63 corresponding to the same single cell 611 through a pin that passes through the channel 610 and the acquisition module 62.
  • the equalization module 63 is connected.
  • control module 64 is connected to the acquisition module 62 and the equalization module 63 corresponding to the same unit cell 611 through two channels 620, 630, respectively.
  • control module 64 includes a control chip that is respectively connected to the acquisition module 62 and the equalization module 63 corresponding to the same single cell 611 through two pins, the two pins and the two channels 620. 630 one-to-one correspondence, for example, one of the two pins is connected to the equalization module 63 through one of the two channels, and the other of the two pins passes the other of the two channels The channel is connected to the acquisition module 62.
  • the battery equalization system includes: a battery management controller (BMC) and a plurality of battery information collectors (BICs).
  • BMC battery management controller
  • BICs battery information collectors
  • the control module described above is disposed in the battery information collector BIC.
  • control module includes a first control unit disposed in the battery information collector and a second control unit disposed in the battery management controller.
  • the collecting module sends the parameter information of the single battery in the collected battery pack to the second control unit through the first control unit; wherein the collecting module and the equalizing module of the same single battery correspond to one connecting channel of the first control unit.
  • the first control unit can be connected to the acquisition module through the control connection channel, thereby controlling the acquisition module to collect parameter information of the single battery in the battery pack.
  • the second control unit may also send an acquisition instruction to the first control unit through the communication unit to control the connection channel to be connected to the acquisition module by the first control unit.
  • the first control unit can be connected to the equalization module through the control connection channel, thereby controlling the equalization module to perform equalization processing on the single cells that need to be turned on.
  • the first control unit may send the parameter information of the battery pack collected by the acquisition circuit to the second control unit, and the second control unit determines, according to the parameter information of the battery pack, the unit battery that needs to be turned on, and sends the unit to the first control unit through the communication unit.
  • the equalization instruction is sent to connect the equalization module to the connection channel through the first control unit.
  • the acquisition module in the battery equalization system sends the parameter information of the single battery in the collected battery pack to the second control unit through the first control unit
  • the acquisition module and the equalization module of the same single battery correspond to the first control unit.
  • a connection channel reduces the number of channels required by the first control unit.
  • the first control unit of the battery information collector and the second control unit of the battery management controller can selectively perform equalization control on the unit cells that need to be equalized. That is, the first control unit may control the equalization module to perform equalization processing on the unit cells that need to be equalized, and the second control unit may also control the equalization module to perform equalization processing on the unit cells that need to be equalized.
  • the first control unit or the second control unit determines the unit cells that need to be equalized according to the parameter information of the battery pack collected by the collection module.
  • the first control unit receives the parameter information of the battery pack, and determines, according to the parameter information of the battery pack, that the single battery in the battery pack needs to be balanced.
  • the control equalization module performs equalization processing on the single cells that need to be turned on.
  • the first control unit receives the parameter information of the battery group, and determines, according to the parameter information of the battery group, that the single battery in the battery group needs to be turned on.
  • the control equalization module performs equalization processing on the single cells that need to be turned on.
  • the first control unit receives the parameter information of the battery group, and according to the parameter information of the battery group, determines that a single battery in the battery group needs to be balanced, and the control equalization module is It is necessary to turn on the balanced single cell for equalization processing.
  • the battery information collector and the battery management controller can selectively control the equalization system through the first control unit and the second control unit, so that one of the battery information collector and the battery management controller can be disabled or malfunctioned. Underneath, the battery balancing system is still guaranteed to operate normally.
  • the collecting module 62 is configured to collect battery information of each single battery in the power battery pack under the control of the control module 64.
  • the control module 64 is configured to obtain target parameter information of the battery to be equalized in the battery group according to the battery information of each unit battery collected by the collection module 62; obtain historical balance time and historical parameter information of the unit battery to be equalized, history
  • the parameter information is historical information of the target parameter information; determining the target equalization time required for the current equalization of the cells to be equalized according to the target parameter information, the historical equalization duration, and the historical parameter information; controlling the unit cells to be equalized according to the target equalization duration Balance.
  • the equalization module 63 is configured to equalize the corresponding single cells under the control of the control module 64.
  • the target parameter information includes: a difference value of the target parameter
  • the control module 64 is configured to acquire target parameters of each of the single cells 611 in the battery pack 61, wherein the target parameter includes any one of the following parameters: voltage, SOC, internal resistance, self-discharge rate, voltage change rate, and power change. Rate and time rate of change;
  • the difference between the target parameters is obtained according to the target parameter of the unit cell to be equalized and the reference value.
  • the target parameter information further includes: an available capacity of the battery to be equalized;
  • the control module 64 is configured to obtain battery information of the battery to be equalized, and the battery information includes at least: a voltage value, a current value, and a temperature value; and the available capacity of the battery to be equalized is obtained according to the battery information of the battery to be equalized.
  • control module 64 is configured to determine the target equalization duration by using the following formula:
  • t k is the target equalization duration
  • t k-1 is the historical equilibrium duration of the last equalization of the cell to be equalized
  • ⁇ S k is the current time, and the target parameter of the cell to be equalized is compared with the reference value of the target parameter
  • ⁇ S k-1 is the difference between the target parameter of the cell to be equalized and the reference value of the target parameter in the last equalization time
  • C k is the current time, the current available capacity of the cell to be balanced
  • C k -1 is the historical available capacity of the cell to be balanced for the last equalization time.
  • control module 64 is further configured to determine, according to a target parameter of each of the single cells in the battery, a cell to be equalized, wherein the target parameters include: voltage, SOC, internal resistance, At least one of a self-discharge rate, a voltage change rate, a power change rate, and a time change rate.
  • the present application also provides a vehicle including the battery equalization system of the above embodiment.
  • the present application also provides a computer readable storage medium having stored thereon computer program instructions that, when executed by a processor, implement the battery balancing method described above.
  • the present application also provides an electronic device comprising the above computer readable storage medium; and one or more processors for executing a program in a computer readable storage medium.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Secondary Cells (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

L'invention concerne un procédé d'égalisation de batterie, comprenant les étapes suivantes : obtention d'informations de paramètre cible d'une cellule à égaliser dans un bloc-batterie (11) (S21) ; obtention d'informations de durée d'égalisation historique et d'informations de paramètre historiques de la cellule à égaliser, les informations de paramètre historiques étant des informations historiques des informations de paramètre cible (S22) ; détermination d'une durée d'égalisation cible requise pour cette égalisation de la cellule à égaliser en fonction des informations de paramètre cible, de la durée d'égalisation historique et des informations de paramètre historiques (S23) ; et commande de l'égalisation de la cellule à égaliser en fonction de la durée d'égalisation cible (S24). L'invention concerne également un système d'égalisation de batterie qui utilise le procédé, un véhicule comprenant le système d'égalisation de batterie et un dispositif électronique comprenant un support lisible par ordinateur qui stocke le procédé. Le procédé d'égalisation de batterie peut être utilisé pour obtenir de manière commode et rapide la durée d'égalisation cible d'une cellule à égaliser, et il est simple et efficace.
PCT/CN2018/103537 2017-08-31 2018-08-31 Procédé et système d'égalisation de batterie, véhicule et dispositif électronique WO2019042416A1 (fr)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113612277A (zh) * 2021-07-30 2021-11-05 阳光电源股份有限公司 一种电池单元及其控制方法
CN113945753A (zh) * 2021-09-01 2022-01-18 力高(山东)新能源技术有限公司 一种判断电池组电芯电压异常的方法
CN114069796A (zh) * 2021-11-24 2022-02-18 广东电网有限责任公司广州供电局 一种电池组主动均衡控制方法、装置、设备及介质
CN114114039A (zh) * 2021-12-06 2022-03-01 湖北亿纬动力有限公司 一种电池系统的单体电芯一致性的评估方法和装置
CN114421567A (zh) * 2022-01-20 2022-04-29 重庆唐古拉科技有限公司 一种电池组主动均衡系统及方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112329355B (zh) * 2020-10-22 2022-10-04 中国石油天然气股份有限公司 单井控制面积的确定方法、装置、计算机设备和存储介质
CN113676414B (zh) * 2021-09-01 2024-06-25 中国银行股份有限公司 信息合并方法、装置、电子设备、介质及产品

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080211230A1 (en) * 2005-07-25 2008-09-04 Rexorce Thermionics, Inc. Hybrid power generation and energy storage system
CN102136749A (zh) * 2011-03-21 2011-07-27 艾默生网络能源有限公司 充电电池的电流均衡控制方法及装置
CN103956800A (zh) * 2014-05-22 2014-07-30 山东大学 一种借鉴历史均衡速度的自适应模糊均衡控制方法
US20140253040A1 (en) * 2013-03-07 2014-09-11 Apple Inc. Preventive balancing technique for battery packs in portable electronic devices

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4215962B2 (ja) * 2000-10-23 2009-01-28 株式会社デンソー ハイブリッド車の電池制御装置
WO2013121916A1 (fr) * 2012-02-17 2013-08-22 住友建機株式会社 Excavatrice et procédé pour commander une excavatrice
CN105634063B (zh) * 2016-01-29 2018-04-03 中国电子科技集团公司第二十九研究所 一种基于电池历史数据的主动均衡方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080211230A1 (en) * 2005-07-25 2008-09-04 Rexorce Thermionics, Inc. Hybrid power generation and energy storage system
CN102136749A (zh) * 2011-03-21 2011-07-27 艾默生网络能源有限公司 充电电池的电流均衡控制方法及装置
US20140253040A1 (en) * 2013-03-07 2014-09-11 Apple Inc. Preventive balancing technique for battery packs in portable electronic devices
CN103956800A (zh) * 2014-05-22 2014-07-30 山东大学 一种借鉴历史均衡速度的自适应模糊均衡控制方法

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113612277A (zh) * 2021-07-30 2021-11-05 阳光电源股份有限公司 一种电池单元及其控制方法
CN113612277B (zh) * 2021-07-30 2024-02-09 阳光电源股份有限公司 一种电池单元及其控制方法
CN113945753A (zh) * 2021-09-01 2022-01-18 力高(山东)新能源技术有限公司 一种判断电池组电芯电压异常的方法
CN113945753B (zh) * 2021-09-01 2023-11-28 力高(山东)新能源技术有限公司 一种判断电池组电芯电压异常的方法
CN114069796A (zh) * 2021-11-24 2022-02-18 广东电网有限责任公司广州供电局 一种电池组主动均衡控制方法、装置、设备及介质
CN114114039A (zh) * 2021-12-06 2022-03-01 湖北亿纬动力有限公司 一种电池系统的单体电芯一致性的评估方法和装置
CN114114039B (zh) * 2021-12-06 2023-10-03 湖北亿纬动力有限公司 一种电池系统的单体电芯一致性的评估方法和装置
CN114421567A (zh) * 2022-01-20 2022-04-29 重庆唐古拉科技有限公司 一种电池组主动均衡系统及方法

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