CN117175751A - Charging current control method and system based on highest temperature of battery - Google Patents
Charging current control method and system based on highest temperature of battery Download PDFInfo
- Publication number
- CN117175751A CN117175751A CN202311442977.4A CN202311442977A CN117175751A CN 117175751 A CN117175751 A CN 117175751A CN 202311442977 A CN202311442977 A CN 202311442977A CN 117175751 A CN117175751 A CN 117175751A
- Authority
- CN
- China
- Prior art keywords
- battery
- current
- temperature
- real
- time
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 39
- 238000004364 calculation method Methods 0.000 claims description 19
- 238000004422 calculation algorithm Methods 0.000 claims description 18
- 238000012937 correction Methods 0.000 claims description 10
- 230000010354 integration Effects 0.000 claims description 10
- 238000010998 test method Methods 0.000 claims description 6
- 230000008859 change Effects 0.000 description 14
- 238000010586 diagram Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 230000003044 adaptive effect Effects 0.000 description 5
- 238000005070 sampling Methods 0.000 description 5
- 230000007423 decrease Effects 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 230000004044 response Effects 0.000 description 4
- 230000003247 decreasing effect Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000012417 linear regression Methods 0.000 description 2
- 238000013178 mathematical model Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 241000135164 Timea Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a charging current control method and a system based on the highest temperature of a battery, wherein the method comprises the following steps: obtaining the highest temperature of the battery; constructing a battery safety model, and calculating the upper limit temperature of the safe operation of the battery according to the real-time SOC of the battery; calculating the difference between the upper limit temperature of the safe operation of the battery at the current moment and the highest temperature of the battery; calculating real-time control current according to the difference value between the upper limit temperature of the safe operation of the battery and the highest temperature of the battery; obtaining boundary current of the battery under the current SOC and temperature; and obtaining the control current of final battery charging according to the boundary current and the real-time control current. The invention accurately regulates and controls the safe use temperature boundary of the battery under different SOCs, obtains the control current of final battery charging according to boundary current and real-time control current, ensures that the battery temperature carries out direct current charging in a safer temperature range, and simultaneously ensures the safety of the battery and the rapidity of charging.
Description
Technical Field
The invention relates to the technical field of battery charging control, in particular to a charging current control method and system based on the highest temperature of a battery.
Background
In a new energy automobile, direct current charging is the most important function, and the direct current charging is to connect an electric automobile to a direct current power grid, and charge the electric automobile by using direct current power supply equipment with control guidance;
at present, charging current is obtained in the direct current charging process and regulated and controlled by combining a battery charging temperature threshold value, the current obtaining mode is to obtain the charging current through two-dimensional table lookup of single voltage and battery temperature, and further the jump and control of the charging current are realized, but the method is to obtain the charging current in a manual calibration mode, so that the current in the charging process jumps to be mechanized; the heat productivity of the battery is large in the quick charge process, the charging current is regulated and controlled by combining with the battery charging temperature threshold, a preset specific temperature value is adopted as the battery charging temperature threshold in the existing method, and the charging current is immediately reduced after the battery temperature reaches the battery charging temperature threshold; the existing charging current regulation and control method cannot adapt to different thermal management systems and different environmental temperatures, so that the charging path changes greatly and the charging efficiency changes greatly under different battery packs and environmental temperatures; when the outdoor temperature is high or the thermal management performance is poor, the charging current is immediately reduced when the battery temperature reaches the battery charging temperature threshold value, the battery charging current can be frequently hopped, the charging time is long, and the charging output is unstable; in addition, charging when the battery temperature is in the vicinity of the safety boundary for a long period of time also affects battery life.
Disclosure of Invention
In order to overcome the defects and shortcomings in the prior art, the invention provides a charging current control method and a charging current control system based on the highest temperature of a battery.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the invention provides a charging current control method based on the highest temperature of a battery, which comprises the following steps:
obtaining the highest temperature of the battery;
constructing a battery safety model, and calculating the upper limit temperature of the safe operation of the battery according to the real-time SOC of the battery;
calculating the difference between the upper limit temperature of the safe operation of the battery at the current moment and the highest temperature of the battery;
Calculating a real-time control current according to the difference value;
obtaining boundary current of the battery under the current SOC and temperature;
and obtaining the control current of final battery charging according to the boundary current and the real-time control current.
As an preferable technical scheme, the construction of the battery safety model, and calculation of the upper limit temperature of the battery safety operation according to the real-time SOC of the battery, specifically comprises the following steps:
and obtaining a correlation between the temperature during thermal runaway and the battery SOC during thermal runaway according to the thermal runaway data of the plurality of groups of batteries, and calculating to obtain the upper limit temperature of the safe operation of the batteries according to the correlation and the real-time SOC of the batteries.
As a preferred technical solution, the obtaining of the correlation between the temperature at the time of thermal runaway and the SOC of the battery at the time of thermal runaway specifically includes:
obtained under different battery SOC conditionsTaking temperature data of thermal runaway of the battery, substituting the temperature data into a formula:fitting to obtain the parameter->And parameters->；
Presetting a parameter c according to the experience of the safe use temperature of the slow-charging battery;
according to the real-time SOC of the battery, calculating the upper limit temperature of the safe operation of the battery, specifically expressed as:
；
wherein,temperature indicating thermal runaway of the battery, unit °c->Indicating the state of charge of the battery, +. >The upper limit temperature of the safe operation of the battery is indicated in units of c.
As a preferable technical solution, the calculating the real-time control current according to the difference value includes the specific steps of:
according to the difference value, calculating to obtain a real-time control current based on a common PID algorithm, wherein the real-time control current is expressed as:
；
wherein,real-time control current value representing current time t, < >>The current value at the last moment in time is indicated,difference between upper limit temperature of battery safety operation and highest temperature of battery at current time t, +.>Indicating the difference between the upper limit temperature of the safe operation of the battery and the highest temperature of the battery at the last moment, +.>Representing the set proportionality coefficient, +.>Representing the set integral coefficient, +.>Representing the set differential coefficient +_>Representing a unit step size;
or calculating to obtain real-time control current based on a fuzzy self-adaptive PID algorithm, wherein the real-time control current is expressed as:
；
wherein,real-time control current value representing current time t, < >>The current value at the last moment in time is indicated,difference between upper limit temperature of battery safety operation and highest temperature of battery at current time t, +.>Upper limit temperature indicating safe operation of battery at last momentDifference between the degree and the maximum temperature of the battery,/-)>Scale factor representing real-time update, +.>Integration coefficient representing real-time update, +. >Differential coefficient representing real-time update +_>Representing the unit step size.
As a preferred technical solution, the step of obtaining the boundary current of the battery under the current SOC and temperature specifically includes:
according to the cell three-electrode test method, boundary current of the battery under the current SOC and temperature is obtained based on reference electrode potential.
As a preferred technical solution, the obtaining the control current of the final battery charging according to the boundary current and the real-time control current specifically includes:
when the boundary current is equal to the real-time control current, selecting the boundary current or the real-time control current as the control current of final battery charging;
and when the boundary current and the real-time control current are unequal, taking the boundary current and the real-time control current down to obtain the control current of the final battery charging.
The invention provides a charging current control system based on the highest temperature of a battery, which comprises the following components: the device comprises a battery maximum temperature acquisition module, an upper limit temperature calculation module, a temperature difference calculation module, a controller, a boundary current acquisition module and a current control module;
the battery maximum temperature acquisition module is used for acquiring the battery maximum temperature;
the upper limit temperature calculation module is used for constructing a battery safety model and calculating the upper limit temperature of the safe operation of the battery according to the real-time SOC of the battery;
The temperature difference calculation module is used for calculating the difference between the upper limit temperature of the safe operation of the battery at the current moment and the highest temperature of the battery;
the controller is used for calculating real-time control current according to the difference value;
the boundary current acquisition module is used for acquiring the boundary current of the battery under the current SOC and the current temperature;
the current control module is used for obtaining the control current of final battery charging according to the boundary current and the real-time control current.
As an preferable technical solution, the upper limit temperature calculation module is configured to construct a battery safety model, calculate an upper limit temperature of a battery for safe operation according to a real-time SOC of the battery, and specifically includes:
and obtaining a correlation between the temperature during thermal runaway and the battery SOC during thermal runaway according to the thermal runaway data of the plurality of groups of batteries, and calculating to obtain the upper limit temperature of the safe operation of the batteries according to the correlation and the real-time SOC of the batteries.
As a preferable technical solution, the correlation between the temperature at the time of thermal runaway and the SOC of the battery at the time of thermal runaway, specifically includes:
temperature data of thermal runaway of the battery are obtained under different battery SOC conditions and are substituted into a formula:fitting to obtain the parameter->And parameters- >；
Presetting a parameter c according to the experience of the safe use temperature of the slow-charging battery;
according to the real-time SOC of the battery, calculating the upper limit temperature of the safe operation of the battery, specifically expressed as:
；
wherein,temperature indicating thermal runaway of the battery, unit °c->Indicating the state of charge of the battery, +.>The upper limit temperature of the safe operation of the battery is indicated in units of c.
As an preferable technical scheme, the controller comprises a PID controller, and input parameters of the PID controller are a difference value between an upper limit temperature of safe operation of the battery and a highest temperature of the battery, and a real-time control current is calculated based on a common PID algorithm by combining a set proportional coefficient, integral coefficient and differential coefficient, and is expressed as:
；
wherein,real-time control current value representing current time t, < >>The current value at the last moment in time is indicated,difference between upper limit temperature of battery safety operation and highest temperature of battery at current time t, +.>Indicating the difference between the upper limit temperature of the safe operation of the battery and the highest temperature of the battery at the last moment, +.>Representing the set proportionality coefficient, +.>Representing the set integral coefficient, +.>Representing the set differential coefficient +_>Representing a unit step size;
or the controller comprises a fuzzy controller and a PID regulator, wherein the input parameter of the fuzzy controller is the difference value between the upper limit temperature of the safe operation of the battery and the highest temperature of the battery, the output parameter is the proportional coefficient, integral coefficient and differential coefficient of the PID correction, the PID regulator is combined with the difference value between the upper limit temperature of the safe operation of the battery and the highest temperature of the battery, and the proportional coefficient, integral coefficient and differential coefficient of the PID correction, and the real-time control current is calculated based on a fuzzy self-adaptive PID algorithm and is expressed as:
；
Wherein,real-time control current value representing current time t, < >>The current value at the last moment in time is indicated,difference between upper limit temperature of battery safety operation and highest temperature of battery at current time t, +.>Indicating the difference between the upper limit temperature of the safe operation of the battery and the highest temperature of the battery at the last moment, +.>Scale factor representing real-time update, +.>Integration coefficient representing real-time update, +.>Differential coefficient representing real-time update +_>Representing the unit step size.
As an preferable technical solution, the boundary current obtaining module is configured to obtain a boundary current of the battery at a current SOC and a temperature, and specifically includes:
according to the cell three-electrode test method, boundary current of the battery under the current SOC and temperature is obtained based on reference electrode potential.
As an preferable technical solution, the current control module is configured to obtain a control current of final battery charging according to the boundary current and the real-time control current, and specifically includes:
when the boundary current is equal to the real-time control current, selecting the boundary current or the real-time control current as the control current of final battery charging;
and when the boundary current and the real-time control current are unequal, taking the boundary current and the real-time control current down to obtain the control current of the final battery charging.
Compared with the prior art, the invention has the following advantages and beneficial effects:
(1) According to the method, the upper limit temperature of the battery safe operation is calculated according to the real-time SOC of the battery, the safe use temperature boundary of the battery under different SOCs is accurately regulated and controlled, the difference value between the upper limit temperature of the battery safe operation at the current moment and the highest temperature of the battery is calculated, the real-time control current is calculated according to the difference value, the control current of battery charging is obtained according to the boundary current and the real-time control current, compared with the prior method, the charging current is obtained in a manual calibration mode and is regulated and controlled by combining with the battery charging temperature threshold value, the charging current immediately drops when the battery temperature reaches the battery charging temperature threshold value in the prior method, the real-time control current is calculated according to the difference value to drop more slowly than the charging current directly obtained in the prior method, the rising of the maximum temperature of the battery can be effectively controlled, the battery temperature is enabled to be charged in a safe temperature range, the frequent jump of the battery charging current and the risk of continuous charging of the battery under dangerous temperature are avoided, meanwhile, the safety of the battery and the charging rapidity are guaranteed, and the service life of the battery are prolonged.
(2) In a preferred scheme, the invention combines the difference value of the upper limit temperature of the safe operation of the battery and the highest temperature of the battery, calculates and obtains the real-time control current based on the fuzzy self-adaptive PID algorithm, effectively solves the problem that the time variability of the electrochemical characteristics of the battery over time causes the uncertainty of a common PID model when the electrochemical characteristics of the battery are different in electrochemical characteristics of the battery, different boundary conditions of the battery core in the battery pack and different in thermal management conditions of the battery pack at the whole vehicle end, and realizes the automatic control of the battery polar speed charging current of different batteries in the whole life cycle through the fuzzy self-adaptive PID control, thereby ensuring that the temperature of the battery is accurately limited in a safe range.
Drawings
Fig. 1 is a flow chart of a charging current control method based on the highest temperature of the battery in embodiment 1;
FIG. 2 is a graph showing the comparison of the control current curve (output) and the boundary current curve (boundary) of the final battery charge according to the embodiment 3;
fig. 3 is a schematic diagram showing the comparison between the current curve (output) of the final battery charging control of the present embodiment 3 and the current curve (existing) of the existing temperature threshold control method;
fig. 4 is a graph showing the comparison between the battery temperature change curve (output) of the final battery charge of example 3 and the battery temperature change curve (existing) of the existing temperature threshold control method;
Fig. 5 is a diagram showing the comparison of the control current curve (output) of the final battery charge setting the fuzzy adaptive PID automatic control condition of the present embodiment 4 with the current curve (existing) of the existing temperature threshold control method;
fig. 6 is a diagram showing the comparison of the battery temperature change curve (output) of the final battery charge with the fuzzy adaptive PID automatic control conditions set in this example 4 with the battery temperature change curve (prior art) of the prior art temperature threshold control method;
fig. 7 is a schematic diagram of the architecture of a charging current control system according to the present embodiment 5 based on the highest temperature of the battery;
fig. 8 is a schematic diagram of the architecture of a charging current control system according to the present embodiment 6 based on the highest temperature of the battery;
fig. 9 is a schematic diagram of the architecture of a charging current control system according to embodiment 7 based on the highest temperature of the battery.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Example 1
As shown in fig. 1, the present embodiment provides a charging current control method based on the highest temperature of a battery, including the following steps:
S1: obtaining the highest temperature of the battery;
in this embodiment, a plurality of temperature sampling points are arranged on the tab and the large surface of the battery module to acquire the battery temperature, and the maximum value acquired by all the temperature sampling points is calculated in real time according to the battery temperature acquired by the temperature sampling points acquired in unit timeAs the highest temperature of the battery, when the number of the temperature sampling points is only 1, the battery temperature value acquired by the temperature sampling points is taken as the highest temperature of the battery;
s2: constructing a battery safety model, and calculating the upper limit temperature of the safe operation of the battery according to the real-time SOC of the battery;
in this embodiment, a battery safety model is constructed, and an upper limit temperature of a battery for safe operation is calculated according to a real-time SOC of the battery, including the specific steps of:
and acquiring a correlation between the temperature during thermal runaway and the battery SOC during thermal runaway according to the thermal runaway data of the plurality of groups of batteries, and calculating according to the correlation and the real-time battery SOC to obtain the upper limit temperature of the safe operation of the batteries.
In this embodiment, the method for acquiring the correlation between the temperature at the time of thermal runaway and the SOC of the battery at the time of thermal runaway includes the specific steps of:
temperature data of thermal runaway of the battery are obtained under different battery SOC conditions and are substituted into a formula: Preferably, the least square method is used for solving a linear regression equation, and the fitting is carried out to obtain parameters +.>And parameters->；
The method comprises the steps of presetting a parameter c according to the safe use temperature experience of a slow charging battery, wherein the value range of c is more than or equal to 0, and the value of c is 5 ℃ for a battery cell with poor general thermal safety performance, such as a ternary lithium battery with high nickel, wherein the value of c is 10 ℃, and the thermal safety performance of the battery cell is better, such as a lithium iron phosphate battery;
according to the real-time SOC of the battery, calculating the upper limit temperature of the safe operation of the battery, specifically expressed as:
；
wherein,temperature indicating thermal runaway of the battery, unit °c->Representing the state of charge of the battery, reflecting the remaining capacity of the battery, defined numerically as the ratio of the remaining capacity to the battery capacity, +.>The upper limit temperature of the safe operation of the battery is indicated in units of c.
S3: calculating the difference between the upper limit temperature of the safe operation of the battery at the current moment and the highest temperature of the battery;
s4: calculating real-time control current according to the difference value between the upper limit temperature of the safe operation of the battery and the highest temperature of the battery;
the existing scheme takes a certain specific temperature value as the upper limit or boundary of the battery charging temperature, does not accord with an electrochemical mechanism, when the SOC state is higher, the battery temperature causing thermal runaway is always lower, and the upper limit of the battery charging temperature cannot be changed correspondingly along with the change of the battery SOC, so the existing scheme cannot accurately regulate and control the battery safety charging boundary; in addition, the correlation between the battery SOC and the upper limit temperature of the safe operation of the battery is obtained through linear fitting, the fitting mode is simpler and more convenient, and the accuracy of the fitting result is high.
In the embodiment, the variation of the real-time control current is obtained by calculating according to the difference between the upper limit temperature of the safe operation of the battery and the highest temperature of the battery, and the real-time control current is obtained after the current value at the previous moment is overlapped;
s5: obtaining boundary current of the battery under the current SOC and temperature;
in this embodiment, for convenience of description, the serial numbers are used to describe each processing step, but the present invention does not require a sequential processing sequence, for example, step S4 and step S5 may be performed simultaneously, or may be performed sequentially, or step S5 may be performed first and then step S4 may be performed.
In this embodiment, the step of obtaining the boundary current of the battery at the current SOC and temperature includes:
according to the cell three-electrode test method, boundary current of the battery under the current SOC and temperature is obtained based on reference electrode potential.
Further, the present embodiment is based on electricityA core three-electrode test method is used for obtaining a corresponding relation table of a battery at the current SOC and the temperature T and boundary current based on a simulation experiment, and obtaining the boundary current of the battery at the current SOC and the temperature T through table lookup（SOC，T）。
S6: and obtaining the control current of final battery charging according to the boundary current and the real-time control current.
In this embodiment, the control current of the final battery charging is obtained according to the boundary current and the real-time control current, and the specific steps include:
when the boundary current is equal to the real-time control current, selecting the boundary current or the real-time control current as the control current of final battery charging;
and when the boundary current and the real-time control current are unequal, taking the boundary current and the real-time control current down to obtain the control current of the final battery charging.
S7: and outputting the control current of the final battery charging to the charging pile as a request current, thereby realizing automatic control of the charging current.
Example 2
The technical content of the embodiment is the same as that of embodiment 1 except for step S4, and specific operations in steps S1 to S3 are not described here again;
s1: obtaining the highest temperature of the battery;
s2: constructing a battery safety model, and calculating the upper limit temperature of the safe operation of the battery according to the real-time SOC of the battery;
s3: calculating the difference between the upper limit temperature of the safe operation of the battery at the current moment and the highest temperature of the battery;
s4: calculating real-time control current according to the difference between the upper limit temperature of the safe operation of the battery at the current moment and the highest temperature of the battery;
in this embodiment, the real-time control current is calculated according to the difference between the upper limit temperature of the safe operation of the battery at the current time and the highest temperature of the battery, and the specific steps include:
According to the difference between the upper limit temperature of the safe operation of the battery and the highest temperature of the battery, calculating to obtain real-time control current based on a common PID algorithm, wherein the real-time control current is expressed as:
；
wherein,real-time control current value representing current time t, < >>The current value indicating the previous time may be preset, or the boundary current at the present SOC and temperature may be set as an initial value, as an initial control current>The difference between the upper limit temperature indicating the safe operation of the battery at the current time t and the highest temperature of the battery,indicating the difference between the upper limit temperature of the safe operation of the battery and the highest temperature of the battery at the last moment, +.>Representing the set proportionality coefficient, +.>Representing the set integral coefficient, +.>Representing the set differential coefficient +_>Representing a unit step size;
wherein PID represents proportional-integral-differential control (proportional-integral-derivative control), and SOC represents state of Charge (State of Charge);
s5: obtaining boundary current of the battery under the current SOC and temperature;
s6: and obtaining the control current of final battery charging according to the boundary current and the real-time control current.
S7: and outputting the control current of the final battery charging to the charging pile as a request current, thereby realizing automatic control of the charging current.
In this embodiment, the scaling factor in the PID algorithm is presetIntegral coefficient->Differential coefficient->The parameter values of the control parameters are mutually independent, and the control method has the advantages of simple parameter selection, simple adjustment control mode and the like.
Example 3
The technical content of the embodiment is the same as that of embodiment 1 except for step S4, and specific operations in steps S1 to S3 are not described here again;
s1: obtaining the highest temperature of the battery;
s2: constructing a battery safety model, and calculating the upper limit temperature of the safe operation of the battery according to the real-time SOC of the battery;
s3: calculating the difference between the upper limit temperature of the safe operation of the battery at the current moment and the highest temperature of the battery;
s4: calculating real-time control current according to the difference between the upper limit temperature of the safe operation of the battery at the current moment and the highest temperature of the battery;
in this embodiment, the real-time control current is calculated according to the difference between the upper limit temperature of the safe operation of the battery at the current time and the highest temperature of the battery, and the specific steps include:
the real-time control current is calculated based on a fuzzy self-adaptive PID algorithm and expressed as:
；
wherein,real-time control current value representing current time t, < >>The current value indicating the previous time may be preset, or the boundary current at the present SOC and temperature may be set as an initial value, as an initial control current >The difference between the upper limit temperature indicating the safe operation of the battery at the current time t and the highest temperature of the battery,indicating the difference between the upper limit temperature of the safe operation of the battery and the highest temperature of the battery at the last moment, +.>Scale factor representing real-time update, +.>Integration coefficient representing real-time update, +.>Differential coefficient representing real-time update +_>Representing a unit step size;
in the present embodiment, when the corresponding temperature is not reached for a long time, the proportionality coefficientHas a correction effect, and the longer the integral step length is, the proportional coefficient is +.>The slower the increase, the shorter the step size, the proportionality coefficient +.>The faster the growth; the heating current is proportional to the deviation, the larger the deviation is, the proportionality coefficient +.>The larger the battery charging current, the larger the proportionality coefficient +.>The larger the temperature is, the faster the temperature rises, and overshoot is easy to occur; if the trend is too fast with the set speed, it is possible to use the differential coefficient +.>Controlling the rising speed and ensuring that overshoot does not occur;
in this embodiment, the unit step dt may be preferably 1s as the calculation step;
in practical application, because different electrochemical characteristics of the battery, boundary conditions of the battery core in the battery pack and thermal management conditions of the battery pack at the whole vehicle end are different, the uncertainty of a common PID model is caused by the time variability of the electrochemical characteristics of the battery along with the time, so that the accurate control of the process cannot be realized by a common PID control algorithm, the embodiment adopts a fuzzy self-adaptive PID algorithm to calculate and obtain real-time control current, the regular conditions are represented by fuzzy sets and stored in a Battery Management System (BMS), the dependence on the mathematical model is weak, an accurate mathematical model of the process is not required to be established, the optimal adjustment of PID parameters is automatically realized according to the actual response condition of the control system, and the accurate limitation of the battery temperature in a safe range is ensured by performing fuzzy self-adaptive PID control on the difference between the upper limit temperature of the safe operation of the battery and the highest temperature of the battery, which is calculated in real time;
In the present embodiment, the fuzzy set in the fuzzy adaptive PID algorithm is set to { NB, NM, NS, ZO, PS, PM, PB }, where NB represents negative big, NM represents negative medium, NS represents negative small, ZO represents zero, PS represents positive small, PM represents positive, PB represents positive big, and temperature deviationDeviation rate of change->The domain of (3) is [ -3, 3]。
When the temperature deviation e is larger, in order to accelerate the response speed of the system and make the system have better tracking performance, and prevent differential overflow possibly caused by the instant increase of the temperature deviation e at the beginning, a larger proportion coefficient should be adoptedAnd a smaller differential coefficient->The method comprises the steps of carrying out a first treatment on the surface of the At the same time, because the system overshoot is large due to the too strong integration, the integration is limited, usually by taking a small integration coefficient +.>A value;
when the temperature deviation e is medium, a certain response speed and a proportion coefficient are ensured to reduce the overshoot of the systemShould be reduced appropriately, in which case the differential coefficient +.>The influence of the value of (2) on the system is larger, the value should be smaller, and the integral coefficient is +.>The value of the number is moderate;
when the temperature deviation e is smaller, in order to reduce steady state error, the system has better steady state performance and differential coefficient Should be larger, the proportionality coefficient +.>And integration coefficient->Can be made smaller in order to avoid oscillation of the output response around the set point while taking into account the systemThe differential coefficient ++when the deviation change rate ec is large>The value of (2) can be made larger, and the differential coefficient ++when the variation rate ec of the deviation is smaller>The value of (2) can be moderate;
as shown in tables 1 to 3 below, according to the scale factor in the PID parametersIntegral coefficient->Differential coefficient->And (3) influencing the output characteristics of the system to obtain a fuzzy rule table of corresponding parameters, and finishing automatic correction of the PID parameters through table lookup and operation processing of fuzzy results.
TABLE 1 scaling factorFuzzy control rule table
TABLE 2 integral coefficientFuzzy control rule table
TABLE 3 differential coefficientFuzzy control rule table
In the embodiment, the fuzzy self-adaptive PID automatic control can be started in real time, and the fuzzy self-adaptive PID calculation can be directly carried out according to the difference value between the upper limit temperature of the safe operation of the battery and the highest temperature of the battery under the condition of monitoring the highest temperature of the battery in real time, so that the whole current regulation and control process is more timely and accurate;
s5: obtaining boundary current of the battery under the current SOC and temperature;
S6: and obtaining the control current of final battery charging according to the boundary current and the real-time control current.
As shown in fig. 2, 3, and 4, a control current change curve and a temperature change curve of the final battery charge are obtained, and in the charge current curve, the horizontal axis represents time s and the vertical axis represents current a; in the battery temperature change curve, the horizontal axis represents time s and the vertical axis represents temperature ℃; the battery in the early stage heats up due to the charging current, the current in the initial stage is maintained at 300A and is equal to the boundary current value, the temperature is slowly increased, the difference between the upper limit temperature of the safe operation of the battery and the highest temperature of the battery is combined, the proportional coefficient, the integral coefficient and the differential coefficient of the PID correction are calculated to obtain the real-time control current, the real-time control current is compared with the boundary current, and the final battery charging control current is obtained; therefore, the boundary current curve is kept unchanged in the current optimal SOC range and the temperature range, and the real-time control current curve is overlapped with the control current curve of the final battery charging after the real-time control current is compared with the boundary current to take values;
As can be seen from fig. 2, 3 and 4, when the battery temperature reaches the upper limit temperature of the safe operation of the battery, the current slowly decreases (instead of immediately decreasing to the preset charging current value when reaching the threshold in the conventional manner), which indicates that the charging current gradually decreases, the heating value also decreases correspondingly, the highest temperature of the battery slowly increases to the temperature boundary without touching the safe boundary, so as to realize optimal control, and the battery temperature can be kept in the safe temperature range for a long time, and the linear change and automatic control of the charging current are ensured, and the charging time is shorter, more efficient and safer.
S7: and outputting the control current of the final battery charging to the charging pile as a request current, thereby realizing automatic control of the charging current.
Example 4
This embodiment has the same technical contents as embodiment 3 except for the following technical contents;
as an engineering preferable scheme, the method also comprises a fuzzy self-adaptive PID automatic control condition setting step for setting the starting temperature for entering the fuzzy self-adaptive PID automatic controlExit temperature +.>When the battery is at maximum temperature>>/>When the fuzzy self-adaptive PID automatic control is performed, the highest temperature of the battery is +. >Exiting fuzzy self-adaptive PID automatic control;
as shown in fig. 5 and 6, a control current change curve of the final battery charge and a temperature change curve of the final battery charge are obtained, and in the charge current curve, the horizontal axis represents time s and the vertical axis represents current a; in the battery temperature change curve, the horizontal axis represents time s and the vertical axis represents temperature ℃; the current of the early battery is maintained at 300A, the temperature is slowly increased, fuzzy self-adaptive PID automatic control is started when the temperature of the battery at the point B reaches 40 ℃, the real-time control current is obtained by combining the difference value between the upper limit temperature of the safe operation of the battery and the highest temperature of the battery and the proportional coefficient, integral coefficient and differential coefficient calculation of the PID correction, as can be known from the combination of fig. 5 and 6, the current boundary current is 300A, the real-time control current is obtained after the fuzzy self-adaptive PID automatic control is started, and the final battery charging control current is obtained after the comparison of the real-time control current and the boundary current, in the embodiment, the boundary current of the battery at the current SOC and the temperature is obtained, the corresponding SOC range is preferably 0-80%, the temperature range is preferably 20-50 ℃, the boundary current curve is unchanged, and the boundary current curve exceeding the SOC range or the temperature range is changed; therefore, the boundary current curve is kept unchanged in the currently preferred SOC range and the temperature range, the real-time control current is overlapped with the final battery charging control current curve after the real-time control current is compared with the boundary current, the current in the final battery charging control current curve slowly decreases (instead of the current in the prior art reaching the threshold value, namely immediately decreasing to the preset charging current value), the rising amplitude of the battery temperature is also slowed down, the charging current is gradually decreased, the heating value is correspondingly reduced, the highest temperature of the battery slowly increases to the temperature boundary and does not touch the safety boundary, the optimal control is realized, the battery temperature can be kept in the safety temperature range for a long time, the linear change and the automatic control of the charging current are ensured, the charging time is shorter, and the efficiency and the safety are higher.
Example 5
This embodiment is the same as embodiment 1 except for the following technical matters;
as shown in fig. 7, the present embodiment provides a charging current control system based on the highest temperature of a battery, including: the device comprises a battery maximum temperature acquisition module, an upper limit temperature calculation module, a temperature difference calculation module, a controller, a boundary current acquisition module and a current control module;
in this embodiment, the battery maximum temperature acquisition module is configured to acquire a battery maximum temperature;
in this embodiment, the upper limit temperature calculation module is configured to construct a battery safety model, and calculate an upper limit temperature of a battery for safe operation according to a real-time SOC of the battery;
in this embodiment, the upper limit temperature calculation module is configured to construct a battery safety model, and calculate an upper limit temperature of a battery for safe operation according to a real-time SOC of the battery, and specifically includes:
and acquiring a correlation between the temperature during thermal runaway and the battery SOC during thermal runaway according to the thermal runaway data of the plurality of groups of batteries, and calculating according to the correlation and the real-time battery SOC to obtain the upper limit temperature of the safe operation of the batteries.
In the present embodiment, the obtaining of the correlation between the temperature at the time of thermal runaway and the SOC of the battery at the time of thermal runaway specifically includes:
Temperature data of thermal runaway of the battery are obtained under different battery SOC conditions and are substituted into a formula:solving a linear regression equation by adopting a least square method, and fitting to obtain a parameter +.>And parameters->；
Presetting a parameter c according to the experience of the safe use temperature of the slow-charging battery;
according to the real-time SOC of the battery, calculating the upper limit temperature of the safe operation of the battery, specifically expressed as:
；
wherein,temperature indicating thermal runaway of the battery, unit °c->Indicating the state of charge of the battery, +.>The upper limit temperature of the safe operation of the battery is indicated in units of c.
In this embodiment, the temperature difference calculation module is configured to calculate a difference between an upper limit temperature of the battery in safe operation at the current time and a highest temperature of the battery;
in this embodiment, the controller is configured to calculate a real-time control current according to a difference between an upper limit temperature of the safe operation of the battery and a highest temperature of the battery;
in the embodiment, the controller calculates the variation of the real-time control current according to the difference value between the upper limit temperature of the safe operation of the battery and the highest temperature of the battery, and the real-time control current is obtained after the current value at the previous moment is overlapped;
in this embodiment, the boundary current obtaining module is configured to obtain a boundary current of the battery at a current SOC and temperature;
In this embodiment, the boundary current obtaining module is configured to obtain a boundary current of the battery at a current SOC and a current temperature, and specifically includes:
according to the three-electrode testing method of the battery cell, obtaining boundary current of the battery under the current SOC and temperature based on the reference electrode potential;
in this embodiment, the current control module is configured to obtain a control current for final battery charging according to the boundary current and the real-time control current.
In this embodiment, the current control module is configured to obtain a control current for charging the battery according to the boundary current and the real-time control current, and specifically includes:
when the boundary current is equal to the real-time control current, selecting the boundary current or the real-time control current as the control current of final battery charging;
and when the boundary current and the real-time control current are unequal, taking the boundary current and the real-time control current down to obtain the control current of the final battery charging.
Example 6
This embodiment has the same technical contents as embodiment 5 except for the following technical contents;
as shown in fig. 8, the controller adopts a PID controller, and the proportional coefficient, integral coefficient and differential coefficient input by the PID controller are set parameter values, and the proportional coefficient, integral coefficient and differential coefficient set in combination with the difference between the upper limit temperature of the safe operation of the battery and the maximum value of the battery temperature are calculated based on a common PID algorithm to obtain a real-time control current, which is expressed as:
；
Wherein,real-time control current value representing current time t, < >>The current value indicating the previous time may be preset, or the boundary current at the present SOC and temperature may be set as an initial value, as an initial control current>The difference between the upper limit temperature indicating the safe operation of the battery at the current time t and the highest temperature of the battery,indicating the difference between the upper limit temperature of the safe operation of the battery and the highest temperature of the battery at the last moment, +.>Representing the set proportionality coefficient, +.>Representing the set integral coefficient, +.>Representing the set differential coefficient +_>Representing the unit step size.
Example 7
This embodiment has the same technical contents as embodiment 5 except for the following technical contents;
as shown in fig. 9, the controller of the present embodiment includes a fuzzy controller and a PID regulator, where the input parameter of the fuzzy controller is the difference between the upper limit temperature of the safe operation of the battery and the highest temperature of the battery, the output parameter is the proportional coefficient, integral coefficient, and differential coefficient of the PID correction, and the PID regulator combines the difference between the upper limit temperature of the safe operation of the battery and the maximum value of the battery temperature, and the proportional coefficient, integral coefficient, and differential coefficient of the PID correction, and calculates to obtain the real-time control current based on the fuzzy adaptive PID algorithm.
In this embodiment, the real-time control current is calculated based on the fuzzy adaptive PID algorithm, expressed as:
；
wherein,real-time control current value representing current time t, < >>The current value at the last moment in time is indicated,difference between upper limit temperature of battery safety operation and highest temperature of battery at current time t, +.>Indicating the difference between the upper limit temperature of the safe operation of the battery and the highest temperature of the battery at the last moment, +.>Scale factor representing real-time update, +.>Integration coefficient representing real-time update, +.>Differential coefficient representing real-time update +_>Representing the unit step size.
The above examples are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above examples, and any other changes, modifications, substitutions, combinations, and simplifications that do not depart from the spirit and principle of the present invention should be made in the equivalent manner, and the embodiments are included in the protection scope of the present invention.
Claims (12)
1. A charging current control method based on a highest temperature of a battery, comprising the steps of:
obtaining the highest temperature of the battery;
constructing a battery safety model, and calculating the upper limit temperature of the safe operation of the battery according to the real-time SOC of the battery;
Calculating the difference between the upper limit temperature of the safe operation of the battery at the current moment and the highest temperature of the battery;
calculating a real-time control current according to the difference value;
obtaining boundary current of the battery under the current SOC and temperature;
and obtaining the control current of final battery charging according to the boundary current and the real-time control current.
2. The method for controlling the charging current based on the highest temperature of the battery according to claim 1, wherein the constructing the battery safety model calculates the upper limit temperature of the battery for safe operation according to the SOC of the battery in real time, comprises the following specific steps:
and obtaining a correlation between the temperature during thermal runaway and the battery SOC during thermal runaway according to the thermal runaway data of the plurality of groups of batteries, and calculating to obtain the upper limit temperature of the safe operation of the batteries according to the correlation and the real-time SOC of the batteries.
3. The method for controlling a charge current based on a highest temperature of a battery according to claim 2, wherein the correlation between the temperature at the time of thermal runaway and the SOC of the battery at the time of thermal runaway is obtained, comprising the steps of:
at different electricityObtaining temperature data of thermal runaway of the battery under the condition of the battery SOC, and substituting the temperature data into a formula:fitting to obtain the parameter->And parameters- >；
Presetting a parameter c according to the experience of the safe use temperature of the slow-charging battery;
according to the real-time SOC of the battery, calculating the upper limit temperature of the safe operation of the battery, specifically expressed as:
；
wherein,temperature indicating thermal runaway of the battery, unit °c->Indicating the state of charge of the battery, +.>The upper limit temperature of the safe operation of the battery is indicated in units of c.
4. The method for controlling a charge current based on a maximum temperature of a battery according to claim 1, wherein the calculating a real-time control current according to the difference value comprises the steps of:
according to the difference value, calculating to obtain a real-time control current based on a common PID algorithm, wherein the real-time control current is expressed as:
；
wherein,real-time control current value representing current time t, < >>Current value representing last moment, +.>Difference between upper limit temperature of battery safety operation and highest temperature of battery at current time t, +.>Indicating the difference between the upper limit temperature of the safe operation of the battery and the highest temperature of the battery at the last moment, +.>Representing the set proportionality coefficient, +.>Representing the set integral coefficient, +.>Representing the set differential coefficient +_>Representing a unit step size;
or calculating to obtain real-time control current based on a fuzzy self-adaptive PID algorithm, wherein the real-time control current is expressed as:
；
wherein, Real-time control current value representing current time t, < >>Current value representing last moment, +.>Difference between upper limit temperature of battery safety operation and highest temperature of battery at current time t, +.>Indicating the difference between the upper limit temperature of the safe operation of the battery and the highest temperature of the battery at the last moment, +.>Scale factor representing real-time update, +.>Integration coefficient representing real-time update, +.>Differential coefficient representing real-time update +_>Representing the unit step size.
5. The method for controlling the charging current based on the highest temperature of the battery according to claim 1, wherein the step of obtaining the boundary current of the battery at the present SOC and temperature comprises the steps of:
according to the cell three-electrode test method, boundary current of the battery under the current SOC and temperature is obtained based on reference electrode potential.
6. The method for controlling a charge current based on a maximum temperature of a battery according to claim 1, wherein the step of obtaining the control current of the final battery charge based on the boundary current and the real-time control current comprises the steps of:
when the boundary current is equal to the real-time control current, selecting the boundary current or the real-time control current as the control current of final battery charging;
And when the boundary current and the real-time control current are unequal, taking the boundary current and the real-time control current down to obtain the control current of the final battery charging.
7. A battery maximum temperature-based charge current control system, comprising: the device comprises a battery maximum temperature acquisition module, an upper limit temperature calculation module, a temperature difference calculation module, a controller, a boundary current acquisition module and a current control module;
the battery maximum temperature acquisition module is used for acquiring the battery maximum temperature;
the upper limit temperature calculation module is used for constructing a battery safety model and calculating the upper limit temperature of the safe operation of the battery according to the real-time SOC of the battery;
the temperature difference calculation module is used for calculating the difference between the upper limit temperature of the safe operation of the battery at the current moment and the highest temperature of the battery;
the controller is used for calculating real-time control current according to the difference value;
the boundary current acquisition module is used for acquiring the boundary current of the battery under the current SOC and the current temperature;
the current control module is used for obtaining the control current of final battery charging according to the boundary current and the real-time control current.
8. The battery maximum temperature-based charging current control system according to claim 7, wherein the upper limit temperature calculation module is configured to construct a battery safety model, and calculate an upper limit temperature of a battery safety operation according to a real-time SOC of the battery, and specifically comprises:
And obtaining a correlation between the temperature during thermal runaway and the battery SOC during thermal runaway according to the thermal runaway data of the plurality of groups of batteries, and calculating to obtain the upper limit temperature of the safe operation of the batteries according to the correlation and the real-time SOC of the batteries.
9. The battery maximum temperature-based charge current control system according to claim 8, wherein the correlation between the temperature at the time of thermal runaway and the battery SOC at the time of thermal runaway is obtained, specifically comprising:
temperature data of thermal runaway of the battery are obtained under different battery SOC conditions and are substituted into a formula:fitting to obtain the parameter->And parameters->；
Presetting a parameter c according to the experience of the safe use temperature of the slow-charging battery;
according to the real-time SOC of the battery, calculating the upper limit temperature of the safe operation of the battery, specifically expressed as:
；
wherein,temperature indicating thermal runaway of the battery, unit °c->Indicating the state of charge of the battery, +.>The upper limit temperature of the safe operation of the battery is indicated in units of c.
10. The battery maximum temperature-based charging current control system according to claim 7, wherein the controller comprises a PID controller, and the input parameter of the PID controller is a difference between an upper limit temperature of safe operation of the battery and the battery maximum temperature, and the real-time control current is calculated based on a common PID algorithm by combining a set proportional coefficient, integral coefficient, and differential coefficient, which is expressed as:
；
Wherein,real-time control current value representing current time t, < >>Current value representing last moment, +.>Difference between upper limit temperature of battery safety operation and highest temperature of battery at current time t, +.>Indicating the difference between the upper limit temperature of the safe operation of the battery and the highest temperature of the battery at the last moment, +.>Representing the set proportionality coefficient, +.>Representing the set integral coefficient, +.>Representing the set differential coefficient +_>Representing a unit step size;
or the controller comprises a fuzzy controller and a PID regulator, wherein the input parameter of the fuzzy controller is the difference value between the upper limit temperature of the safe operation of the battery and the highest temperature of the battery, the output parameter is the proportional coefficient, integral coefficient and differential coefficient of the PID correction, the PID regulator is combined with the difference value between the upper limit temperature of the safe operation of the battery and the highest temperature of the battery, and the proportional coefficient, integral coefficient and differential coefficient of the PID correction, and the real-time control current is calculated based on a fuzzy self-adaptive PID algorithm and is expressed as:
；
wherein,real-time control current value representing current time t, < >>Current value representing last moment, +.>Difference between upper limit temperature of battery safety operation and highest temperature of battery at current time t, +. >Indicating the difference between the upper limit temperature of the safe operation of the battery and the highest temperature of the battery at the last moment, +.>Scale factor representing real-time update, +.>Integration coefficient representing real-time update, +.>Differential coefficient representing real-time update +_>Representing the unit step size.
11. The battery maximum temperature-based charging current control system according to claim 7, wherein the boundary current acquisition module is configured to acquire a boundary current of the battery at a present SOC and temperature, and specifically comprises:
according to the cell three-electrode test method, boundary current of the battery under the current SOC and temperature is obtained based on reference electrode potential.
12. The battery maximum temperature based charging current control system of claim 7, wherein the current control module is configured to obtain a control current for a final battery charge based on the boundary current and the real-time control current, and specifically comprises:
when the boundary current is equal to the real-time control current, selecting the boundary current or the real-time control current as the control current of final battery charging;
and when the boundary current and the real-time control current are unequal, taking the boundary current and the real-time control current down to obtain the control current of the final battery charging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311442977.4A CN117175751A (en) | 2023-11-02 | 2023-11-02 | Charging current control method and system based on highest temperature of battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311442977.4A CN117175751A (en) | 2023-11-02 | 2023-11-02 | Charging current control method and system based on highest temperature of battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117175751A true CN117175751A (en) | 2023-12-05 |
Family
ID=88939743
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311442977.4A Pending CN117175751A (en) | 2023-11-02 | 2023-11-02 | Charging current control method and system based on highest temperature of battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117175751A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118117717A (en) * | 2024-04-28 | 2024-05-31 | 张家港格居信息科技有限公司 | Storage battery matching method based on unstable power supply |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06150981A (en) * | 1992-11-06 | 1994-05-31 | Kyushu Denki Seizo Kk | Residual capacity meter for battery |
| US6281663B1 (en) * | 1999-11-11 | 2001-08-28 | Honda Giken Kogyo Kabushiki Kaisha | Battery charging method |
| JP2009183105A (en) * | 2008-01-31 | 2009-08-13 | Panasonic Corp | Charge control circuit, battery pack, and charging system |
| JP2011172409A (en) * | 2010-02-19 | 2011-09-01 | Honda Motor Co Ltd | System for control of battery characteristic |
| CN113156316A (en) * | 2021-04-26 | 2021-07-23 | 太仓中科赛诺新能源科技有限公司 | Estimation algorithm for SOC of brine battery |
| US20210328449A1 (en) * | 2018-12-27 | 2021-10-21 | Huawei Technologies Co., Ltd. | Battery charging method and apparatus |
| US20220140635A1 (en) * | 2020-10-30 | 2022-05-05 | Techtronic Cordless Gp | Battery Pack with Temperature Limited Current |
| CN115238983A (en) * | 2022-07-19 | 2022-10-25 | 上海颉码能源科技有限公司 | Charging safety state evaluation method and system based on BP neural network |
| CN115622173A (en) * | 2022-09-27 | 2023-01-17 | 潍柴动力股份有限公司 | Control method, control device and control system for battery charging |
| CN116683478A (en) * | 2023-06-07 | 2023-09-01 | 广东电网有限责任公司广州供电局 | Charging station frequency modulation charging excitation method based on equivalent damping coefficient stability |
-
2023
- 2023-11-02 CN CN202311442977.4A patent/CN117175751A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06150981A (en) * | 1992-11-06 | 1994-05-31 | Kyushu Denki Seizo Kk | Residual capacity meter for battery |
| US6281663B1 (en) * | 1999-11-11 | 2001-08-28 | Honda Giken Kogyo Kabushiki Kaisha | Battery charging method |
| JP2009183105A (en) * | 2008-01-31 | 2009-08-13 | Panasonic Corp | Charge control circuit, battery pack, and charging system |
| JP2011172409A (en) * | 2010-02-19 | 2011-09-01 | Honda Motor Co Ltd | System for control of battery characteristic |
| US20210328449A1 (en) * | 2018-12-27 | 2021-10-21 | Huawei Technologies Co., Ltd. | Battery charging method and apparatus |
| US20220140635A1 (en) * | 2020-10-30 | 2022-05-05 | Techtronic Cordless Gp | Battery Pack with Temperature Limited Current |
| CN113156316A (en) * | 2021-04-26 | 2021-07-23 | 太仓中科赛诺新能源科技有限公司 | Estimation algorithm for SOC of brine battery |
| CN115238983A (en) * | 2022-07-19 | 2022-10-25 | 上海颉码能源科技有限公司 | Charging safety state evaluation method and system based on BP neural network |
| CN115622173A (en) * | 2022-09-27 | 2023-01-17 | 潍柴动力股份有限公司 | Control method, control device and control system for battery charging |
| CN116683478A (en) * | 2023-06-07 | 2023-09-01 | 广东电网有限责任公司广州供电局 | Charging station frequency modulation charging excitation method based on equivalent damping coefficient stability |
Non-Patent Citations (2)
| Title |
|---|
| 汤爱华: "电动汽车用锂离子动力电池大功率快充方法研究", 南京理工大学学报, vol. 45, no. 6, pages 761 - 772 * |
| 窦文娟 等: "三元锂离子电池高温诱导热失控试验研究", 青岛大学学报（工程技术版）, vol. 36, no. 4, 31 December 2021 (2021-12-31), pages 1 - 7 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118117717A (en) * | 2024-04-28 | 2024-05-31 | 张家港格居信息科技有限公司 | Storage battery matching method based on unstable power supply |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Perez et al. | Optimal charging of Li-ion batteries with coupled electro-thermal-aging dynamics | |
| CN109987000B (en) | Power battery temperature prediction system and method | |
| Klein et al. | Optimal charging strategies in lithium-ion battery | |
| CN110635187B (en) | Lithium battery charging method considering aging | |
| CN111430844B (en) | Thermal management method and device for battery pack charging and automobile | |
| CN109659637B (en) | Low-temperature charging method for alternating current-direct current superposed lithium ion battery | |
| CN104505550B (en) | Passive equalization method and system for lithium iron phosphate battery pack | |
| US9153991B2 (en) | System and method for fast charging of lithium-ion batteries with improved safety | |
| US6495992B1 (en) | Method and apparatus for charging batteries utilizing heterogeneous reaction kinetics | |
| JP4527047B2 (en) | Secondary battery control device and secondary battery output control method | |
| CN112490540B (en) | Power battery system, temperature control method and device thereof, medium and processor | |
| CN117175751A (en) | Charging current control method and system based on highest temperature of battery | |
| JP2013509851A (en) | A method of charging or discharging a battery for determining the end of charging or discharging based on current and temperature measurements | |
| US20170338667A1 (en) | Model-based fast-charging method based on lithium surface concentration | |
| CN109873455B (en) | AGC frequency modulation method and system for energy storage auxiliary thermal power unit | |
| CN110728037B (en) | Battery capacity closed-loop fusion prediction method | |
| CN108417917A (en) | A kind of lithium ion battery fast charge method | |
| CN106773650B (en) | Method for rapidly heating and keeping constant temperature of lithium ion storage battery pack at extremely low temperature | |
| WO2023001214A1 (en) | Multi-battery-pack charging management method and apparatus, and energy storage device | |
| CN114243136A (en) | Charging optimization method for lithium battery | |
| CN114156912B (en) | Energy management method and system for primary frequency modulation by using hybrid energy storage | |
| CN109494771B (en) | New energy power smoothing control method based on super capacitor charge state prediction | |
| CN114859251B (en) | Method and device for calculating battery charging remaining time and vehicle | |
| CN111180814A (en) | Charging control method of series lithium ion battery pack based on multi-module charger | |
| CN117154906B (en) | Wireless charging regulation and control method with refrigeration function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |