CN111497685B - Automobile lithium battery charging management method and system - Google Patents
Automobile lithium battery charging management method and system Download PDFInfo
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- CN111497685B CN111497685B CN202010223106.3A CN202010223106A CN111497685B CN 111497685 B CN111497685 B CN 111497685B CN 202010223106 A CN202010223106 A CN 202010223106A CN 111497685 B CN111497685 B CN 111497685B
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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
- B60L58/22—Balancing the charge of battery modules
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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
- B60L58/16—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to battery ageing, e.g. to the number of charging cycles or the state of health [SoH]
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
- H01M10/443—Methods for charging or discharging in response to temperature
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
- H02J7/00036—Charger exchanging data with battery
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0014—Circuits for equalisation of charge between batteries
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
- H02J7/005—Detection of state of health [SOH]
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/007188—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters
- H02J7/007192—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature
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- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- 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
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Abstract
The invention discloses a car lithium battery charging management method and a system, which respectively record and count the resting time of a car, the residual electric quantity when the car enters a charging state, the magnitude of charging voltage and current and the charging time so as to calculate the charging time and the total overcharging time in each charging state, comprehensively calculating the total electric quantity estimation coefficient according to the weight preset for each parameter, then calculating the estimated total electric quantity of the automobile lithium battery according to the initial total electric quantity and the total electric quantity estimation coefficient of the automobile lithium battery, the real total electric quantity of the current lithium battery estimated according to the service condition of the lithium battery can be more accurately and comprehensively reflected, the charging process is divided into a full-power charging section and an active equalization charging section by calculating the set percentage of the estimated total electric quantity, the damage to the automobile lithium battery caused by unbalanced charging can be reduced under the condition of ensuring the charging efficiency.
Description
Technical Field
The invention relates to the field of automobile battery charging, in particular to an automobile lithium battery charging management method and system.
Background
In the process of charging and using the automobile lithium battery, the variation of the performance of the single batteries is not completely due to the technical problem of battery production, even if the voltage and the internal resistance of each battery are completely consistent when leaving a factory, the difference can be generated after the battery is used for a period of time, so that the inconsistency exists among the single batteries during charging, particularly in the final stage before full charging, the charging is unbalanced, and the automobile lithium battery is damaged;
the conventional active equalizing charge control is performed according to the percentage of the maximum charge of the lithium battery, for example, the first 80% of the lithium battery is normally charged, and the last 20% of the lithium battery is actively equalized charged, but since the lithium battery is subjected to loss and attenuation after being used, the true maximum charge is also discounted, but a method and a system for evaluating the true maximum charge are absent in the prior art.
Disclosure of Invention
In view of the above, the present invention provides a method and a system for managing charging of an automotive lithium battery, which evaluate a real maximum charging amount of the automotive lithium battery and control charging according to the real maximum charging amount.
Based on the above object, the present invention provides a method for managing charging of an automotive lithium battery, based on an automotive battery management system and a charging control system, the method comprising:
the automobile battery management system calculates the estimated total electric quantity of the automobile lithium battery, specifically including,
when the automobile lithium battery is not in a charging or discharging state, recording the idle time of the automobile lithium battery;
if the idle time of the automobile lithium battery exceeds a set value, the automobile lithium battery is regarded as being placed, timing is continued on the basis of the idle time, and the time is recorded and accumulated as the placing time;
if the automobile lithium battery is in a charging state, recording the residual electric quantity, the magnitude of charging voltage and current and the charging time when the automobile lithium battery enters the charging state;
calculating the overcharge time of the automobile lithium battery according to the residual electric quantity, the charging voltage and current and the charging time when the automobile lithium battery enters a charging state, and deducting the overcharge time from the charging time each time to obtain the normal charging time of each charging;
accumulating the overcharge time of each charge;
according to the shelving time of the automobile lithium battery, the residual electric quantity of the automobile lithium battery in the charging state each time, the magnitude of the voltage and the current of the automobile lithium battery in each charging process, the normal charging time and the accumulated overcharge time, respectively carrying out weighting calculation according to respective preset weights, and then obtaining a total electric quantity estimation coefficient;
calculating the estimated total electric quantity of the automobile lithium battery according to the initial total electric quantity and the total electric quantity estimation coefficient of the automobile lithium battery;
the charging control system charges the automobile lithium battery according to the maximum allowable charging current and the rated charging voltage of the automobile lithium battery;
and after the automobile lithium battery is charged to the set percentage of the estimated total electric quantity, the charging control system carries out active equalizing charging on the automobile lithium battery until the electric quantity of the automobile lithium battery is fully charged.
Preferably, the method further comprises:
when the automobile lithium battery is not in a charging or discharging state, recording the ambient temperature of the automobile lithium battery;
if the standing time needs to be recorded and accumulated, obtaining a temperature coefficient according to the average ambient temperature in the standing time, and accumulating after multiplying the standing time by the temperature coefficient.
Preferably, deriving the temperature coefficient from the average ambient temperature over the period of shelf life comprises:
dividing the temperature range into a plurality of temperature ranges, and setting a temperature coefficient for each temperature range;
and judging the temperature interval of the average environment temperature in the period of the resting time, and selecting the temperature coefficient corresponding to the temperature interval.
Preferably, the method further comprises:
when the environmental temperature of the automobile lithium battery in the shelf time is recorded, if the shelf time exceeds a set value, the shelf time is recorded again, and the environmental temperature in each shelf time is respectively recorded;
and obtaining a temperature coefficient according to the average ambient temperature in each period of the resting time, and accumulating the temperature coefficient multiplied by each period of the resting time.
A car lithium battery charge management system comprises a car battery management system and a charge control system;
wherein, car battery management system includes the database, still includes:
the state detection module is used for detecting whether the automobile lithium battery is in a charging state or a discharging state;
the timing module is used for recording the idle time of the automobile lithium battery when the automobile lithium battery is not in a charging or discharging state, continuing timing on the basis of the idle time when the idle time exceeds a set value, recording the idle time into a database and accumulating the idle time into the shelving time;
the charging detection module is used for recording the residual electric quantity, the charging voltage and current and the charging time when the automobile lithium battery enters a charging state;
the charging time calculation module is used for calculating the overcharge time of the automobile lithium battery according to the residual electric quantity, the charging voltage and current and the charging time when the automobile lithium battery enters a charging state, deducting the overcharge time from the charging time each time to obtain the normal charging time of each charging, accumulating the overcharge time of each charging and recording the overcharge time in a database;
the coefficient calculation module is used for carrying out weighting calculation according to the shelving time of the automobile lithium battery, the residual electric quantity of the automobile lithium battery in the charging state every time, the charging voltage and current of the automobile lithium battery every time, the normal charging time and the accumulated overcharge time respectively according to respective preset weights to obtain a total electric quantity estimation coefficient;
the electric quantity estimation module is used for calculating the estimated total electric quantity of the automobile lithium battery according to the initial total electric quantity and the total electric quantity estimation coefficient of the automobile lithium battery;
and the charging control system is used for charging the automobile lithium battery according to the maximum allowable charging current and the rated charging voltage of the automobile lithium battery, and actively and uniformly charging the automobile lithium battery until the electric quantity of the automobile lithium battery is full of the electric quantity after the automobile lithium battery is charged to the set percentage of the estimated total electric quantity.
Preferably, the method further comprises the following steps:
the temperature detection module is used for detecting the environmental temperature of the automobile lithium battery and recording the environmental temperature in the database when the automobile lithium battery is not in a charging or discharging state;
and the temperature coefficient module is used for obtaining a temperature coefficient according to the average ambient temperature in the period of the shelf time if the shelf time needs to be recorded and accumulated.
The timing module is also used for accumulating the rest time multiplied by the temperature coefficient.
Preferably, the temperature coefficient module is further configured to:
dividing the temperature range into a plurality of temperature ranges, and setting a temperature coefficient for each temperature range;
and judging the temperature interval of the average environment temperature in the period of the resting time, and selecting the temperature coefficient corresponding to the temperature interval.
Preferably, when the temperature detection module records the ambient temperature of the automobile lithium battery within the shelf time, if the shelf time exceeds a set value, the shelf time is re-recorded once, and the ambient temperature within each shelf time is respectively recorded;
the temperature coefficient module is also used for obtaining a temperature coefficient according to the average ambient temperature in each period of the resting time;
the timing module is also used for accumulating each standing time after multiplying each standing time by the temperature coefficient.
From the above, it can be seen that, the method and system for managing charging of lithium batteries of automobiles provided by the invention, the resting time of the automobile, the residual electric quantity when the automobile enters the charging state, the magnitude of the charging voltage and the current and the charging time are respectively recorded and counted, so that the charging time and the total overcharging time in each charging state are calculated, comprehensively calculating the total electric quantity estimation coefficient according to the weight preset for each parameter, then calculating the estimated total electric quantity of the automobile lithium battery according to the initial total electric quantity and the total electric quantity estimation coefficient of the automobile lithium battery, the real total electric quantity of the current lithium battery estimated according to the service condition of the lithium battery can be more accurately and comprehensively reflected, the charging process is divided into a full-power charging section and an active equalization charging section by calculating the set percentage of the estimated total electric quantity, the damage to the automobile lithium battery caused by unbalanced charging can be reduced under the condition of ensuring the charging efficiency.
Drawings
FIG. 1 is a schematic flow chart of a method for managing charging of a lithium battery of an automobile according to an embodiment of the present invention;
fig. 2 is a schematic diagram of module connection of a lithium battery charging management system of an automobile according to an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to specific embodiments and the accompanying drawings.
It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are used for distinguishing two entities with the same name but different names or different parameters, and it should be noted that "first" and "second" are merely for convenience of description and should not be construed as limitations of the embodiments of the present invention, and they are not described in any more detail in the following embodiments.
A charging management method for an automobile lithium battery is based on an automobile battery management system and a charging control system, and comprises the following steps:
the automobile battery management system calculates the estimated total electric quantity of the automobile lithium battery, specifically including,
s101, recording the idle time of the automobile lithium battery when the automobile lithium battery is not in a charging or discharging state;
s102, if the idle time of the automobile lithium battery exceeds a set value, the automobile lithium battery is regarded as being placed, timing is continued on the basis of the idle time, and the time is recorded and accumulated as the placing time;
the lithium battery has two ways of evaluating the service life of the lithium battery, namely calendar life and cycle life, and the two ways of evaluating the service life are adopted because the self decay speed of the lithium battery is different in the cycle use process and the shelf process.
The above-mentioned resting time, for example, if the lithium battery of the automobile is not in a charging or discharging state for a short period of time, it is an interval in normal operation, and if the lithium battery of the automobile is not in a charging or discharging state for a long period of time, it can be regarded as resting, and the resting time is recorded from the last charging or discharging state of the lithium battery.
S103, if the automobile lithium battery is in a charging state, recording the residual electric quantity, the magnitude of charging voltage and current and the charging time when the automobile lithium battery enters the charging state;
the residual electric quantity when entering the charging state represents the discharging depth in the last discharging, and the charging voltage and current and the charging time both can cause the influence on the service life of the battery.
S104, calculating the overcharge time of the automobile lithium battery according to the residual electric quantity, the charging voltage and current and the charging time when the automobile lithium battery enters a charging state, and deducting the overcharge time from each charging time to obtain the normal charging time of each charging;
the lithium battery can cause larger loss to the lithium battery in an overcharged state, so that the normal charging time and the overcharged time are respectively calculated;
s105, accumulating the overcharging time of each charging;
s106, according to the shelving time of the automobile lithium battery, the residual electric quantity of the automobile lithium battery in the charging state every time, the magnitude of the charging voltage and current of the automobile lithium battery every time, the normal charging time and the accumulated overcharge time, respectively, weighting calculation is carried out according to respective preset weights, and then a total electric quantity estimation coefficient is obtained.
For example, weights may be set for the lithium batteries of the automobile according to different loss degrees of the lithium batteries of the automobile by different factors, or calculation functions may be set for the weights by means of statistics, curve fitting, or the like.
S107, calculating the estimated total electric quantity of the automobile lithium battery according to the initial total electric quantity and the total electric quantity estimation coefficient of the automobile lithium battery.
For example, the calculation method is to multiply the initial total electric quantity by the total electric quantity estimation coefficient, and the obtained estimated total electric quantity is the current actual total electric quantity of the lithium battery estimated according to the service condition of the lithium battery.
S108, the charging control system charges the automobile lithium battery according to the maximum allowable charging current and the rated charging voltage of the automobile lithium battery;
and S109, after the automobile lithium battery is charged to the set percentage of the estimated total electric quantity, the charging control system carries out active equalizing charging on the automobile lithium battery until the automobile lithium battery is fully charged.
For example, the percentage is set to 80%, each battery pack in the lithium battery can hardly reach the upper charging limit in the process of charging the lithium battery of the automobile to 80%, the lithium battery is charged by the maximum power at the moment, the problem of unbalanced charging caused by different total electric quantities of each battery pack can occur in the last 20% charging process, the lithium battery of the automobile needs to be actively and uniformly charged at the moment, the active and uniform charging can adopt a charging technology based on a boost technology and a farad capacitor, and the part is not taken as a protection object of the invention and can adopt the prior art.
The method comprises the steps of respectively recording and counting the shelving time of the automobile, the residual electric quantity when the automobile enters a charging state, the magnitude of charging voltage and current and the charging time, further calculating the charging time and the total overcharge time in each charging state, comprehensively calculating a total electric quantity estimation coefficient according to the preset weight of each parameter, then calculating the estimated total electric quantity of the automobile lithium battery according to the initial total electric quantity and the total electric quantity estimation coefficient of the automobile lithium battery, more accurately and comprehensively reflecting the current real total electric quantity of the lithium battery estimated according to the service condition of the lithium battery, dividing the charging process into a full-power charging section and an active equalization charging section by setting percentage calculation on the estimated total electric quantity, and reducing the damage to the automobile lithium battery caused by unbalanced charging under the condition of ensuring the charging efficiency.
As an embodiment, when the automobile lithium battery is not in a charging or discharging state, recording the ambient temperature of the automobile lithium battery;
and if the standing time needs to be recorded and accumulated, obtaining a temperature coefficient according to the average ambient temperature in the standing time, and accumulating after multiplying the standing time by the temperature coefficient.
When the lithium battery is in a shelf state, the environment temperature can also influence the attenuation speed of the lithium battery, if the attenuation is faster at high temperature and slower at low temperature, the state of the lithium battery of the automobile can be more accurately evaluated by introducing environment temperature parameters to calculate the temperature coefficient.
As an embodiment, deriving the temperature coefficient from the average ambient temperature over the period of shelf life comprises:
dividing the temperature range into a plurality of temperature ranges, and setting a temperature coefficient for each temperature range;
and judging the temperature interval of the average environment temperature in the period of the resting time, and selecting the temperature coefficient corresponding to the temperature interval.
For example, a standard temperature of 20 ℃ can be set, the temperature coefficient is 1, a plurality of temperature intervals are respectively defined above and below 20 ℃, and the corresponding temperature coefficient is set according to the influence of the temperature on the lithium battery.
As an embodiment, the method further comprises:
when the environmental temperature of the automobile lithium battery in the shelf time is recorded, if the shelf time exceeds a set value, the shelf time is recorded again, and the environmental temperature in each shelf time is respectively recorded;
and obtaining a temperature coefficient according to the average ambient temperature in each period of the resting time, and accumulating the temperature coefficient multiplied by each period of the resting time.
If the resting time is longer, the ambient temperature in the resting time period may also undergo a larger change, further dividing the resting time into a plurality of sections, and calculating the temperature coefficients respectively.
The invention also provides an automobile lithium battery charging management system, which comprises an automobile battery management system and a charging control system;
wherein, car battery management system includes the database, still includes:
the state detection module is used for detecting whether the automobile lithium battery is in a charging state or a discharging state;
the timing module is used for recording the idle time of the automobile lithium battery when the automobile lithium battery is not in a charging or discharging state, continuing timing on the basis of the idle time when the idle time exceeds a set value, recording the idle time into the database and accumulating the idle time into the resting time;
the charging detection module is used for recording the residual electric quantity, the charging voltage and current and the charging time when the automobile lithium battery enters a charging state;
the charging time calculation module is used for calculating the overcharge time of the automobile lithium battery according to the residual electric quantity, the charging voltage and current and the charging time when the automobile lithium battery enters a charging state, deducting the overcharge time from the charging time each time to obtain the normal charging time of each charging, accumulating the overcharge time of each charging and recording the overcharge time in the database;
the coefficient calculation module is used for carrying out weighting calculation according to the shelving time of the automobile lithium battery, the residual electric quantity of the automobile lithium battery in the charging state every time, the charging voltage and current of the automobile lithium battery every time, the normal charging time and the accumulated overcharge time respectively according to respective preset weights to obtain a total electric quantity estimation coefficient;
the electric quantity estimation module is used for calculating the estimated total electric quantity of the automobile lithium battery according to the initial total electric quantity of the automobile lithium battery and the total electric quantity estimation coefficient;
the charging control system is used for charging the automobile lithium battery according to the maximum allowable charging current and the rated charging voltage of the automobile lithium battery, and actively and uniformly charging the automobile lithium battery after the automobile lithium battery is charged to the set percentage of the estimated total electric quantity until the electric quantity of the automobile lithium battery is full.
As an implementation mode, the system further comprises a temperature detection module, wherein when the automobile lithium battery is not in a charging or discharging state, the temperature detection module detects the ambient temperature of the automobile lithium battery and records the ambient temperature in the database;
and the temperature coefficient module is used for obtaining a temperature coefficient according to the average ambient temperature in the period of the shelf time if the shelf time needs to be recorded and accumulated.
As an embodiment, the temperature coefficient module is further configured to:
dividing the temperature range into a plurality of temperature ranges, and setting a temperature coefficient for each temperature range;
and judging the temperature interval of the average environment temperature in the period of the resting time, and selecting the temperature coefficient corresponding to the temperature interval.
As an implementation manner, when the temperature detection module records the ambient temperature of the lithium battery of the automobile in the shelf time, if the shelf time exceeds a set value, the shelf time is re-recorded once, and the ambient temperature in each shelf time is respectively recorded;
the temperature coefficient module is also used for obtaining a temperature coefficient according to the average ambient temperature in each period of the resting time;
and the timing module is also used for accumulating each period of the resting time multiplied by the temperature coefficient.
Those of ordinary skill in the art will understand that: the discussion of any embodiment above is meant to be exemplary only, and is not intended to intimate that the scope of the disclosure, including the claims, is limited to these examples; within the idea of the invention, also features in the above embodiments or in different embodiments may be combined, steps may be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity.
In addition, well known power/ground connections to Integrated Circuit (IC) chips and other components may or may not be shown within the provided figures for simplicity of illustration and discussion, and so as not to obscure the invention. Furthermore, devices may be shown in block diagram form in order to avoid obscuring the invention, and also in view of the fact that specifics with respect to implementation of such block diagram devices are highly dependent upon the platform within which the present invention is to be implemented (i.e., specifics should be well within purview of one skilled in the art). Where specific details (e.g., circuits) are set forth in order to describe example embodiments of the invention, it should be apparent to one skilled in the art that the invention can be practiced without, or with variation of, these specific details. Accordingly, the description is to be regarded as illustrative instead of restrictive.
While the present invention has been described in conjunction with specific embodiments thereof, many alternatives, modifications, and variations of these embodiments will be apparent to those of ordinary skill in the art in light of the foregoing description. For example, other memory architectures (e.g., dynamic ram (dram)) may use the discussed embodiments.
The embodiments of the invention are intended to embrace all such alternatives, modifications and variances that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, substitutions, improvements and the like that may be made without departing from the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (8)
1. A charging management method for an automobile lithium battery is characterized by comprising the following steps of based on an automobile battery management system and a charging control system:
the automobile battery management system calculates the estimated total electric quantity of the automobile lithium battery, specifically including,
when the automobile lithium battery is not in a charging or discharging state, recording the idle time of the automobile lithium battery;
if the idle time of the automobile lithium battery exceeds a set value, the automobile lithium battery is regarded as being placed, timing is continued on the basis of the idle time, and the time is recorded and accumulated as the placing time;
if the automobile lithium battery is in a charging state, recording the residual electric quantity, the magnitude of charging voltage and current and the charging time when the automobile lithium battery enters the charging state;
calculating the overcharge time of the automobile lithium battery according to the residual electric quantity, the charging voltage and current and the charging time when the automobile lithium battery enters a charging state, and deducting the overcharge time from the charging time each time to obtain the normal charging time of each charging;
accumulating the overcharge time of each charge;
according to the shelving time of the automobile lithium battery, the residual electric quantity of the automobile lithium battery in the charging state each time, the magnitude of the voltage and the current of the automobile lithium battery in each charging process, the normal charging time and the accumulated overcharge time, respectively carrying out weighting calculation according to respective preset weights, and then obtaining a total electric quantity estimation coefficient;
calculating the estimated total electric quantity of the automobile lithium battery according to the initial total electric quantity of the automobile lithium battery and the total electric quantity estimation coefficient;
the charging control system charges the automobile lithium battery according to the maximum allowable charging current and the rated charging voltage of the automobile lithium battery;
and after the automobile lithium battery is charged to the set percentage of the estimated total electric quantity, the charging control system carries out active equalizing charging on the automobile lithium battery until the electric quantity of the automobile lithium battery is fully charged.
2. The method for managing charging of a lithium battery for an automobile of claim 1, further comprising:
when the automobile lithium battery is not in a charging or discharging state, recording the ambient temperature of the automobile lithium battery;
and if the standing time needs to be recorded and accumulated, obtaining a temperature coefficient according to the average ambient temperature in the standing time, and accumulating after multiplying the standing time by the temperature coefficient.
3. The method of claim 2, wherein deriving the temperature coefficient based on the average ambient temperature over the period of shelf life comprises:
dividing the temperature range into a plurality of temperature ranges, and setting a temperature coefficient for each temperature range;
and judging the temperature interval of the average environment temperature in the period of the resting time, and selecting the temperature coefficient corresponding to the temperature interval.
4. The method for managing charging of a lithium battery for an automobile of claim 2, further comprising:
when the environmental temperature of the automobile lithium battery in the shelf time is recorded, if the shelf time exceeds a set value, the shelf time is recorded again, and the environmental temperature in each shelf time is respectively recorded;
and obtaining a temperature coefficient according to the average ambient temperature in each period of the resting time, and accumulating the temperature coefficient multiplied by each period of the resting time.
5. A car lithium battery charge management system is characterized by comprising a car battery management system and a charge control system;
wherein, car battery management system includes the database, still includes:
the state detection module is used for detecting whether the automobile lithium battery is in a charging state or a discharging state;
the timing module is used for recording the idle time of the automobile lithium battery when the automobile lithium battery is not in a charging or discharging state, continuing timing on the basis of the idle time when the idle time exceeds a set value, recording the idle time into the database and accumulating the idle time into the resting time;
the charging detection module is used for recording the residual electric quantity, the charging voltage and current and the charging time when the automobile lithium battery enters a charging state;
the charging time calculation module is used for calculating the overcharge time of the automobile lithium battery according to the residual electric quantity, the charging voltage and current and the charging time when the automobile lithium battery enters a charging state, deducting the overcharge time from the charging time each time to obtain the normal charging time of each charging, accumulating the overcharge time of each charging and recording the overcharge time in the database;
the coefficient calculation module is used for carrying out weighting calculation according to the shelving time of the automobile lithium battery, the residual electric quantity of the automobile lithium battery in the charging state every time, the charging voltage and current of the automobile lithium battery every time, the normal charging time and the accumulated overcharge time respectively according to respective preset weights to obtain a total electric quantity estimation coefficient;
the electric quantity estimation module is used for calculating the estimated total electric quantity of the automobile lithium battery according to the initial total electric quantity of the automobile lithium battery and the total electric quantity estimation coefficient;
the charging control system is used for charging the automobile lithium battery according to the maximum allowable charging current and the rated charging voltage of the automobile lithium battery, and actively and uniformly charging the automobile lithium battery after the automobile lithium battery is charged to the set percentage of the estimated total electric quantity until the electric quantity of the automobile lithium battery is full.
6. The automotive lithium battery charging management system of claim 5, further comprising:
the temperature detection module is used for detecting the ambient temperature of the automobile lithium battery and recording the ambient temperature in the database when the automobile lithium battery is not in a charging or discharging state;
the temperature coefficient module is used for obtaining a temperature coefficient according to the average ambient temperature in the period of the shelf time if the shelf time needs to be recorded and accumulated;
the timing module is further configured to multiply the shelf time by the temperature coefficient and then accumulate the shelf time.
7. The automotive lithium battery charging management system of claim 6, wherein the temperature coefficient module is further configured to:
dividing the temperature range into a plurality of temperature ranges, and setting a temperature coefficient for each temperature range;
and judging the temperature interval of the average environment temperature in the period of the resting time, and selecting the temperature coefficient corresponding to the temperature interval.
8. The automobile lithium battery charging management system according to claim 6, wherein when the temperature detection module records the ambient temperature of the automobile lithium battery during the resting time, if the resting time exceeds a set value, the resting time is re-recorded once, and the ambient temperature during each resting time is respectively recorded;
the temperature coefficient module is also used for obtaining a temperature coefficient according to the average ambient temperature in each period of the resting time;
and the timing module is also used for accumulating each period of the resting time multiplied by the temperature coefficient.
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Effective date of registration: 20210608 Address after: Ruizhida company service center, phase II, Wickham reef, tortorarod City, vg1110, British Virgin Islands Patentee after: Guanlei battery Holding Co.,Ltd. Address before: 313009 no.358-1, Chizhou Avenue, Huaxi street, Changxing County, Huzhou City, Zhejiang Province Patentee before: Mingchuang Jialian (Zhejiang) New Energy Technology Co.,Ltd. |