CN108828450B - Starting type storage battery state early warning system - Google Patents
Starting type storage battery state early warning system Download PDFInfo
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- CN108828450B CN108828450B CN201810678282.9A CN201810678282A CN108828450B CN 108828450 B CN108828450 B CN 108828450B CN 201810678282 A CN201810678282 A CN 201810678282A CN 108828450 B CN108828450 B CN 108828450B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/005—Testing of electric installations on transport means
- G01R31/006—Testing of electric installations on transport means on road vehicles, e.g. automobiles or trucks
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Abstract
The invention discloses a starting type storage battery state early warning system, wherein under the condition that a storage battery is in a full-charge state and at a rated environment temperature, the storage battery discharges at a rated current, the lowest voltage value in the stage of starting discharging is obtained to judge the discharging capability of the storage battery, and the value is used as a standard to judge whether the electronic injection of an engine can be started to the lowest degree; the service life of the storage battery is used as an early warning standard, and the method is more accurate and reliable.
Description
Technical Field
The invention relates to the field of automobile power systems, in particular to a starting type storage battery state early warning system.
Background
At present, drivers generally observe the color of a charge state indicator (commonly called an "electric eye") arranged on the top of a starting lead-acid storage battery for automobiles by judging the charge state of the starting lead-acid storage battery. When the color of the 'electric eye' is green, the storage battery has good charge; when the color of the electric eye is black, the electric quantity of the storage battery is insufficient; when the color of the 'electric eye' is white, the storage battery is failed. The principle of the 'electric eye' is to test the density of the electrolyte of the storage battery, the 'electric eye' is a plastic piece with fixed specific gravity, the position of the plastic piece changes along with the change of the specific gravity of the electrolyte, and the color also changes along with the change of the specific gravity of the electrolyte. However, the state of the storage battery is not only related to the density of the electrolyte, but also related to a plurality of states such as corrosion and vulcanization of a polar plate, and therefore the display accuracy of the 'electric eye' is low.
Disclosure of Invention
The invention discloses a starting type storage battery state early warning system which effectively improves the early warning precision of the storage battery state.
The invention discloses a starting type storage battery state early warning system, which comprises: a battery unit, a battery sensor unit, and a calculation unit;
the storage battery sensor unit monitors the voltage, the current and the ambient temperature information of the storage battery unit in real time, and the computing unit computes the state of charge of the storage battery by utilizing the voltage, the current and the ambient temperature information monitored by the storage battery sensor unit;
under the condition that the storage battery is in a certain state of charge and at a certain environmental temperature, the storage battery discharges at a rated current, the storage battery sensor unit acquires a lowest voltage value SOH _ COR at the beginning of a discharging stage, and when the lowest voltage value SOH _ COR is less than a + delta, the service life of the storage battery is determined to be in early warning; wherein a is the lowest working voltage of an electronic injection ECU of the engine, and delta is an experimental calibration floating value.
Further, the SOH _ COR is the lowest voltage value of 1S discharged by the storage battery with rated current CCA when the storage battery is in a full-charge state and the ambient temperature is-18 ℃; the CCA is a maximum constant current value which is that the storage battery is in a full-charge state, the ambient temperature is-18 ℃, the storage battery is continuously discharged for 30 seconds by a constant current, and the lowest voltage is not less than 7.2V.
Further, the battery state of charge comprises: charge capacity, uncharged capacity, sulfidation capacity, corrosion capacity, chargeable capacity and rated capacity;
chargeable capacity = charged capacity + uncharged capacity;
rated capacitance = charged capacity + uncharged capacity + sulfided capacity + corrosion capacity;
when the chargeable capacity is less than K multiplied by the rated capacity, the service life of the storage battery is judged to be early-warned, wherein, K is more than 0 and less than 100 percent.
Further, K = 75%.
Further, the battery state of charge also includes the active capacity, active capacity = charge capacity + uncharged capacity + sulfidation capacity;
and the SOC = SOC/active capacity, and when the SOC is less than 50%, the battery is judged to be low in electricity and early-warning.
Further, the calculation unit is a vehicle body control unit, and the vehicle body control unit receives the voltage, current and environmental temperature information of the storage battery unit, which is monitored and transmitted by the storage battery sensor unit in real time, to calculate the state of charge of the storage battery, and judges whether the service life and/or the electric quantity of the storage battery should be warned.
The beneficial technical effects of the invention are as follows:
1) under the condition of a certain charge state and a certain environment temperature of the storage battery, the storage battery discharges at a rated current, the lowest voltage value of a discharge starting stage is obtained to judge the discharge capacity of the storage battery, and the value is used as a standard to judge whether the engine electronic fuel injection can be started to the lowest degree; the service life of the storage battery is used as an early warning standard, and the method is more accurate and reliable.
2) The capacity of the battery is rated as: charge capacity, uncharged capacity, sulfidation capacity, corrosion capacity, chargeable capacity and rated capacity; chargeable capacity = charged capacity + uncharged capacity; rated capacitance = charged capacity + uncharged capacity + sulfided capacity + corrosion capacity; when the chargeable capacity is less than Kx rated capacity, the service life of the storage battery is determined to be early-warned; wherein 0< K < 100%; the influence of the vulcanization factor and the corrosion factor on the service life of the battery is accurately defined.
3) And the SOC of the electric quantity value of the storage battery is also defined, the influence of vulcanization factors on the electric quantity value is considered, and the electric quantity early warning precision of the storage battery is improved.
Drawings
FIG. 1 is a diagram of a start-up battery condition warning system architecture;
FIG. 2 is a diagram of a starting battery capacity distribution model;
FIG. 3 is a diagram of start-up battery monitoring and output signals;
fig. 4 is a diagram of a start-up battery warning state.
Detailed Description
The invention will be further explained with reference to the drawings.
As shown in fig. 1, the start-up battery state warning system disclosed by the present invention includes a battery unit 01, a battery sensor unit 02, and a calculation unit (mainly, a vehicle body control unit 03);
the storage battery sensor unit 02 monitors the voltage, the current and the ambient temperature information of the storage battery unit 01 in real time, transmits the information to the vehicle body control unit 03, and the vehicle body control unit 03 calculates the charge state of the storage battery and judges whether the service life and/or the electric quantity of the storage battery reach an early warning state or not.
As shown in fig. 2, the battery state of charge includes: charge capacity, uncharged capacity, sulfidation capacity, corrosion capacity, chargeable capacity, rated capacity and chargeable capacity.
Chargeable capacity = charged capacity + uncharged capacity;
when no corrosion or sulfuration occurs, the rated capacity is the rated capacity of a new storage battery and is determined by the following formula:
chargeable capacity = charged capacity + uncharged capacity;
rated capacitance = charged capacity + uncharged capacity + sulfided capacity + corrosion capacity;
active capacity = charged capacity + uncharged capacity + sulfided capacity;
the charge capacity is the current charged part of the storage battery, and the discharged charge capacity is the uncharged capacity;
the uncharged capacity is the capacity of the current uncharged part of the storage battery, and the charged capacity is the charged capacity after charging;
the vulcanization capacity is partial capacity of vulcanized crystals of the storage battery, has strong inertia, has certain restorability by using professional charging equipment, but is difficult to recover and utilize under the charging working condition of a vehicle generator;
the corrosion capacity is the partial capacity lost when the storage battery is corroded, and is irreversible;
as shown in fig. 3, the battery sensor unit 02 monitors and outputs the condition. Monitoring the current (I), the voltage (V) and the temperature (T);
the output includes:
state of charge, SOC = charge capacity/active capacity;
active capacity SOH _ LAM (available capacity), SOH _ LAM = sulfidation capacity + chargeable capacity;
degree of vulcanization SOH _ SUL (degree of vulcanization), SOH _ SUL = chargeable/active capacity;
SOH _ COR will be described in detail below.
As shown in FIG. 4, under a certain state of charge (for example: when the capacity is full) and under a certain ambient temperature condition (for example: -18 ℃), the storage battery is discharged at a rated current, the storage battery sensor unit obtains the lowest voltage value SOH _ COR of the initial discharge stage, when the lowest voltage value SOH _ COR is less than a + delta, the storage battery is considered to be aged, and the service life of the storage battery should be warned; wherein a is the lowest working voltage of an engine electronic injection ECU (optionally the lowest working voltage of the engine electronic injection ECU is 6.5V), and delta is an experimental calibration floating value;
for example, the SOH — COR may be a minimum voltage value at which, in a fully charged state of the battery, the nominal ambient temperature may be selected to be-18 ℃, and the battery is discharged for 1 second at the nominal current CCA; the CCA is a maximum constant current value which is that the storage battery is in a full-charge state, the ambient temperature is-18 ℃, the storage battery is continuously discharged for 30 seconds by a constant current, and the lowest voltage is not less than 7.2V.
For another example, the SOH _ COR may be a minimum voltage value at which the battery is discharged for 1 second at a rated current CCA at an ambient temperature of 20 ℃ in a state of charge of 90% of the battery; the CCA is a maximum constant current value which is that the storage battery is in a full-charge state, the ambient temperature is-18 ℃, the storage battery is continuously discharged for 30 seconds by a constant current, and the lowest voltage is not less than 7.2V.
When the SOH _ COR is detected, different minimum voltage values result according to different states of charge and ambient temperatures of the storage battery.
When the chargeable capacity is less than Kmultiplied by the rated capacity, the storage battery is considered to be aged, the service life of the storage battery is considered to be early-warned, wherein K can be selected to be equal to 75%;
and the SOC = SOC/active capacity, and when the SOC is less than 50%, the battery is judged to be low in electricity and early-warning.
Claims (4)
1. Start type battery state early warning system, its characterized in that: comprises a storage battery unit (01), a storage battery sensor unit (02) and a calculation unit;
the storage battery sensor unit monitors the voltage, the current and the ambient temperature information of the storage battery unit in real time, and the computing unit computes the state of charge of the storage battery by utilizing the voltage, the current and the ambient temperature information monitored by the storage battery sensor unit;
under the condition that the storage battery is in a certain state of charge and at a certain environmental temperature, the storage battery discharges at a rated current, the storage battery sensor unit acquires a lowest voltage value SOH _ COR at the beginning of a discharging stage, and when the lowest voltage value SOH _ COR is less than a + delta, the service life of the storage battery is determined to be in early warning; wherein a is the lowest working voltage of an electronic injection ECU of the engine, and delta is an experimental calibration floating value;
the state of charge of the battery includes: charge capacity, uncharged capacity, sulfidation capacity, corrosion capacity, chargeable capacity and rated capacity;
chargeable capacity = charged capacity + uncharged capacity;
rated capacitance = charged capacity + uncharged capacity + sulfided capacity + corrosion capacity;
when the chargeable capacity is less than K multiplied by the rated capacity, the service life of the storage battery is judged to be early-warned, wherein, K is more than 0 and less than 100 percent;
the battery state of charge further comprises an active capacity, the active capacity = charged capacity + uncharged capacity + sulfided capacity;
the SOC = SOC/active capacity, and when the SOC is less than 50%, the battery is judged to be low in electricity and early-warning;
the charge capacity is the current charged part capacity of the storage battery, the uncharged capacity is the current uncharged part capacity of the storage battery, the vulcanization capacity is the vulcanized crystallized part capacity of the storage battery, and the corrosion capacity is the lost part capacity of the storage battery caused by corrosion.
2. The starter battery state warning system according to claim 1, wherein: the SOH _ COR is the lowest voltage value of the storage battery which discharges 1S by rated current CCA when the storage battery is in a full-charge state and the ambient temperature is-18 ℃; the CCA is a maximum constant current value which is that the storage battery is in a full-charge state, the ambient temperature is-18 ℃, the storage battery is continuously discharged for 30 seconds by a constant current, and the lowest voltage is not less than 7.2V.
3. The starter battery state warning system according to claim 1, wherein: k = 75%.
4. The starter battery state warning system according to claim 1, wherein: the calculation unit is a vehicle body control unit (03), and the vehicle body control unit receives the voltage, current and environmental temperature information of the storage battery unit, which is monitored and transmitted by the storage battery sensor unit in real time, to calculate the charge state of the storage battery and judge whether the service life and/or the electric quantity of the storage battery should be warned.
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| CN201810678282.9A CN108828450B (en) | 2018-06-27 | 2018-06-27 | Starting type storage battery state early warning system |
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| CN201810678282.9A CN108828450B (en) | 2018-06-27 | 2018-06-27 | Starting type storage battery state early warning system |
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| CN108828450B true CN108828450B (en) | 2021-05-04 |
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| CN100372703C (en) * | 2002-10-14 | 2008-03-05 | 金百达科技有限公司 | Monitoring method and device with early warning for power supply on vehicle |
| CN205022502U (en) * | 2015-10-10 | 2016-02-10 | 北汽福田汽车股份有限公司 | Battery control system and management system |
| CN106114426B (en) * | 2016-06-28 | 2019-02-15 | 广州汽车集团股份有限公司 | A kind of Vehicular power management system and its control method |
| CN206086595U (en) * | 2016-10-20 | 2017-04-12 | 安徽江淮汽车集团股份有限公司 | Vehicle power control system |
| CN106515624B (en) * | 2016-12-20 | 2023-06-06 | 深圳伊艾克斯信息技术有限公司 | Independently-operated automobile power supply safety monitoring and protecting device and method |
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