CN115765113A - Charger and charging method thereof - Google Patents
Charger and charging method thereof Download PDFInfo
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- CN115765113A CN115765113A CN202211618007.0A CN202211618007A CN115765113A CN 115765113 A CN115765113 A CN 115765113A CN 202211618007 A CN202211618007 A CN 202211618007A CN 115765113 A CN115765113 A CN 115765113A
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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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Abstract
The invention provides a charging method of a charger, which comprises the following steps: step 1: quick charging; step 2: charging at constant voltage; step 3 is equalizing charge, when the current value of the constant voltage charge reaches the set switching current value or the timing value of the constant voltage charge reaches the set switching timing value in step 2, the step is switched to step 3, the step also comprises the step of acquiring temperature, the set switching current value is reduced along with the reduction of the acquired temperature, and the set switching timing value is increased along with the reduction of the acquired temperature. The invention also protects the charger, and the charging method and the charger can realize sufficient electric quantity charging at low temperature and improve the riding feeling of a user at low temperature.
Description
Technical Field
The invention relates to the field of storage batteries.
Background
At present, in the process of charging a lead-acid storage battery, three-stage charging is generally used, namely an initial fast charging stage, a middle slow charging stage and a later-stage equalizing charging stage. Large current is used initially to shorten the charging time; after the voltage of the battery rises to a certain value, the constant voltage is used to prevent the battery from losing water; and after the battery is basically fully charged, the battery is supplemented with low current so as to reduce the damage to the storage battery and finish the equalizing charge. In order to prevent thermal runaway during high-temperature charging, a current charger generally adds a period of time control in a constant voltage section, namely when the constant voltage charging current in a second section is not reduced to a conversion current value and the time reaches a set conversion timing value, the charger is switched to a third section of equalizing charging. However, at low temperature, due to the reason of setting the conversion timing value, the charging time of the constant voltage section is completely determined by the conversion timing value, and the charging is insufficient, in the prior art, the charging time of the constant voltage section is prolonged by prolonging the set conversion timing value when the temperature is low, however, the problem that the constant voltage section is charged with enough electric quantity still cannot be solved by prolonging the set conversion timing value, and especially when the temperature gradually decreases day by day in winter, the charged electric quantity is less and less, and the riding experience of a user is greatly influenced. .
Disclosure of Invention
In order to solve the above technical problem, the present invention provides a charging method of a charger, comprising the following steps: step 1: quick charging; step 2: charging at constant voltage; step 3 is equalizing charge, and when the current value of constant voltage charge reaches the set switching current value or the timing value of constant voltage charge reaches the set switching timing value in step 2, the method is switched to step 3, and the method is characterized by further comprising the step of acquiring temperature, wherein the set switching current value is reduced along with the reduction of the acquired temperature, and the set switching timing value is increased along with the reduction of the acquired temperature.
Further, in the step 2, when the acquired temperature decreases, the voltage value of the constant voltage charging increases.
Further, the time required for the constant voltage charging to reach the set switching current value in said step 2 is shorter than the set switching timing value.
Further, the step of acquiring the temperature is acquiring an ambient temperature of the charger.
Further, the charging method is applied to lead-acid storage batteries.
The invention also protects a charger, which comprises a control unit, a charging unit for charging a rechargeable battery, a temperature detection unit and a storage unit, wherein the storage unit is internally stored with a conversion timing value and a conversion current value.
Further, the charging unit includes a fast charge, a constant voltage charge and an equalizing charge, the control unit adjusts the voltage value of the constant voltage charge according to the temperature detected by the detection unit, and the voltage value of the constant voltage charge increases when the detected temperature decreases.
Further, the charging device further comprises a comparison unit and a current detection unit, wherein the comparison unit is used for comparing the current value detected by the current detection unit with the set conversion current value, and the control unit is used for controlling the charging unit when the current value detected by the current detection unit reaches the set conversion current value or the conversion timing value of the storage unit.
Further, the charging device further comprises a constant voltage timing unit, the comparison unit is further used for comparing the timing value of the constant voltage timing unit with the set conversion timing value, and the control unit is used for controlling the charging unit when the current value detected by the current detection unit reaches the set conversion current value or the timing value of the constant voltage timing unit reaches the set conversion timing value.
Further, the storage unit storing the conversion timing value is a timer.
Further, the storage unit includes a conversion timing value storage unit that stores a conversion timing value and a conversion current value storage unit that stores a conversion current value.
Further, the charger is used for charging the lead-acid storage battery.
The charging method and the charger can realize sufficient electric quantity charging at low temperature, and improve the riding feeling of a user at low temperature.
Drawings
FIG. 1 is a block diagram of the elements of the charger of the present invention;
Detailed Description
The invention is further described with reference to specific examples.
As shown in fig. 1, the present invention provides a charger for a lead-acid storage battery 6, which includes a switching unit 1, a charging unit 2, a voltage detection unit 3, a storage unit 4, a control unit 5, a temperature detection unit 7, a current detection unit 8, and a comparison unit 9. The switch unit 1 is used for completing alternating current-direct current conversion of commercial power, providing working power supplies of other unit modules in the charger and providing charging current or charging voltage; the charging unit 2 is used for receiving the charging current or charging voltage signal provided by the switch unit 1 and providing the charging current or charging voltage signal to the lead-acid storage battery 6; the voltage detection unit 3 detects the voltage of the lead-acid storage battery 6 and sends the detection result to the control unit 5; the current detection unit 8 realizes current detection and sends a detection result to the control unit 5, the storage unit 4 is used for storing a conversion timing value and a conversion current value, the storage unit 4 also comprises a conversion timing value storage unit and a conversion current value storage unit, the conversion timing value storage unit stores a conversion timing value, and the conversion current value storage unit stores a conversion current value. The comparison unit 9 is used for comparing the current value detected by the current detection unit 8 with the conversion current value stored in the conversion current value storage unit, that is, with the set conversion current value, and the control unit 5 is used for controlling the charging unit 2 to charge the lead-acid storage battery 6 in a corresponding charging manner when the current value detected by the current detection unit 6 reaches the set conversion current value or the conversion timing value of the conversion timing value storage unit is reached. The conversion timing value of the conversion timing value storage unit can be reached by setting the storage unit storing the conversion timing value as a timer, or by setting a constant voltage timing unit, starting the constant voltage timing unit to start timing when constant voltage charging is started, the comparison unit 9 is also used for comparing the timing value of the constant voltage timing unit with the conversion timing value stored and set in the storage unit, and when the timing value of the constant voltage timing unit reaches the set conversion timing value, the control unit 5 controls the charging unit 2 to charge the lead-acid storage battery 6 in a corresponding charging mode. The temperature detecting unit 7 detects the temperature, preferably the ambient temperature of the lead-acid battery 6, the control unit 5 dynamically adjusts the switching timing value and the switching current value in the storage unit 4 according to the temperature detected by the temperature detecting unit 7, the switching current value set in the storage unit 4 decreases as the detected temperature decreases, and the switching timing value set in the storage unit 4 increases as the detected temperature decreases. The control unit 5 may also dynamically adjust the voltage value of the constant voltage charging of the charging unit 2 according to the temperature detected by the temperature detection unit 7, the voltage value of the constant voltage charging increasing as the detected temperature decreases.
When the battery starts to charge, the commercial power is converted into a controllable charging voltage or charging current signal through AC-DC (alternating current-direct current), the control unit controls the charging unit to enter a first stage, namely a rapid charging stage, for example, the rapid charging stage can be carried out by using a large current and a constant current, and can also be carried out by using a constant voltage or constant power. The control unit opens the voltage detection unit to detect the battery voltage, if the detected voltage value reaches the corresponding battery cell voltage, the control unit controls the charging unit to enter the second stage according to the input signal of the voltage detection unit, the control unit charges at a constant voltage, the control unit activates the timer and controls the charging unit to charge at a time-limited constant voltage at the time of the constant voltage, when the preset conversion timing value of the timer reaches, the control unit 5 controls the charging unit 2 to enter the third stage, or when the constant voltage charging current value reaches the set conversion current value, the control unit controls the charging unit 2 to enter the third stage, when the conversion timing value reaches, the constant voltage charging can be started, the constant voltage timing unit starts to time, the timing value of the constant voltage timing unit is compared with the set conversion timing value through the comparison unit 9, when the timing value of the constant voltage timing unit reaches the set conversion timing value, the charging unit 2 is controlled to enter the third stage, namely, the equalization charging stage, the constant current charging or the constant voltage charging is adopted, and the whole charging process is completed. The conversion timing value and the conversion current value can be dynamically set according to the temperature of the rechargeable battery, namely, the conversion timing value and the conversion current value set for the constant voltage charging are compensated according to the temperature of the rechargeable battery, the temperature compensation of the conversion timing value is mainly in a constant voltage charging stage, the set conversion timing value is increased when the detected temperature is reduced, the set conversion current value is reduced when the detected temperature is reduced, and the adjustment of the conversion timing value and the conversion current value is preferably to ensure that the time required for the constant voltage charging to reach the set conversion current value in the step 2 is less than the set conversion timing value.
Taking a 48V20AH lead-acid battery as an example, in the first stage, the constant current 4A is charged, when the voltage of the rechargeable battery reaches 14.4V, and the second stage, namely the constant voltage charging stage, is entered, the constant voltage charging voltage is 14.7V, and the ambient temperature of the rechargeable battery is detected, for example:
if the temperature is 25 ℃, the time set by the time value of the conversion timer is 96 minutes, and the current value of the conversion is 0.6A; the constant voltage stage was charged for 92 minutes with a charge of 2.6AH. That is, the time 92 minutes required for the constant voltage charge to reach the set switching current value is less than the set switching timer value 96 minutes.
If the detected temperature is 5 ℃, the conversion timing value is dynamically adjusted to 180 minutes, the conversion current value is dynamically adjusted to 0.36A, the charging time in the constant voltage stage is 175 minutes, and the electric quantity is charged to 5.4AH. That is, the time 175 minutes required for the constant voltage charge to reach the set switching current value is less than the set switching timer value of 180 minutes.
If the detected temperature is-5 ℃, the control unit dynamically adjusts the conversion timing value to 250 minutes, and the conversion current value is dynamically adjusted to 0.28A; the constant voltage phase was charged for 245 minutes to a charge of 7.6AH. That is, the time 245 minutes required for the constant voltage charge to reach the set switching current value is shorter than the set switching timer value of 250 minutes.
Comparative example 1
Taking 48V20AH battery as an example, the first stage of constant current 4A charging is performed, when the voltage of the rechargeable battery reaches 14.4V, and the second stage, i.e. the constant voltage charging stage, is entered, the constant voltage charging voltage is 14.7V, and the ambient temperature of the rechargeable battery is detected, for example:
if the temperature is 25 deg.C, the time set by the switch timer value is 96 minutes, the switch current value is 0.6A; the constant voltage stage was charged for 92 minutes with a charge of 2.6AH.
If the detected temperature is 5 ℃, dynamically adjusting the conversion timing value to 180 minutes, and keeping the conversion current value to be 0.6A; the constant voltage phase was charged for 130 minutes to a charge of 4.9AH.
If the detected temperature is-5 ℃, the control unit dynamically adjusts the conversion timing value to 250 minutes, and the conversion current value is still 0.6A; the constant voltage stage is charged for 180 minutes, and the charge is 7.1AH.
Comparative example 2
Taking 48V20AH battery as an example, the first stage of constant current 4A charging is performed, when the voltage of the rechargeable battery reaches 14.4V, and the second stage, i.e. the constant voltage charging stage, is entered, the constant voltage charging voltage is 14.7V, and the ambient temperature of the rechargeable battery is detected, for example:
if the temperature is 25 ℃, the time set by the time value of the conversion timer is 96 minutes, and the current value of the conversion is 0.6A; the constant voltage stage was charged for 92 minutes with a charge of 2.6AH.
If the detected temperature is 5 ℃, the conversion timing value is dynamically adjusted to 120 minutes, and the conversion current value is still 0.6A; because the time for reaching the conversion current value is prolonged, the time for dynamically adjusting the conversion timing value is not long enough, the charging time in the constant voltage stage depends on the conversion timing value, the charging time in the constant voltage stage is 120 minutes, and the charging capacity is 4.1AH.
If the detected temperature is-5 ℃, the control unit dynamically adjusts the conversion timing value to 160 minutes, and the conversion current value is still 0.6A; the time for reaching the conversion current value is prolonged, the time for dynamically adjusting the conversion timing value is not long enough, the constant voltage stage charging time depends on the conversion timing value, the constant voltage stage charging time is 160 minutes, and the charging capacity is 6.9AH.
The voltage value of the constant voltage charging of the charging unit 2 of the present invention can also be dynamically set according to the temperature of the rechargeable battery, "temperature compensation" of the constant voltage charging voltage, charging with increasing the constant voltage charging voltage when the temperature decreases, and charging with decreasing the constant voltage charging voltage when the temperature increases, for example:
if the detected temperature is 25 ℃, the constant voltage charging voltage is 14.7 volts,
if the detected temperature is 5 ℃, the constant voltage charging voltage is dynamically adjusted to 15.2 volts,
if the detected temperature is-5 ℃, the constant voltage charging voltage is dynamically adjusted to 15.4 volts.
By dynamically adjusting the constant voltage charging voltage according to the battery temperature, a higher temperature can reduce water loss and prevent thermal runaway, and a lower temperature can charge more electricity.
The temperature obtained in the charging method of the present invention may be detected by a detection unit of the charger in the embodiment of the present invention, or may be obtained by transmitting detected temperature information to the charger through other devices such as a battery. Furthermore, the acquisition temperature is preferably the ambient temperature, and the acquisition temperature is preferably acquired at the end of step 1.
The temperature compensation of the conversion timing value, the conversion current value, and the voltage value of the constant voltage charging of the present invention may employ linear compensation.
The charging process can ensure that considerable electric quantity is charged when the temperature is high, and can charge as much electric quantity as possible when the temperature is low, and particularly greatly improves the riding experience of a user when the temperature gradually decreases day by day in winter. Water loss can also be controlled.
The charger and the charging method are applied to the lead-acid storage battery.
The above-described embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the spirit of the invention as set forth in the claims.
Claims (12)
1. A charging method of a charger, comprising the steps of: step 1: quick charging; and 2, step: charging at constant voltage; step 3 is equalizing charge, and when the current value of constant voltage charge reaches the set switching current value or the timing value of constant voltage charge reaches the set switching timing value in step 2, the method is switched to step 3, and the method is characterized by further comprising the step of acquiring temperature, wherein the set switching current value is reduced along with the reduction of the acquired temperature, and the set switching timing value is increased along with the reduction of the acquired temperature.
2. The charging method of a charger according to claim 1, wherein in said step 2, when the acquired temperature decreases, the voltage value of said constant voltage charging increases.
3. A charging method of a charger according to claim 1 or 2, wherein a time required for the constant voltage charging to reach the set switching current value in step 2 is less than the set switching timing value.
4. The charging method of a charger according to claim 1 or 2, wherein the step of acquiring the temperature is an ambient temperature acquired by the charger.
5. A method of charging a charger as claimed in claim 1 or 2, wherein the method of charging is applied to a lead-acid battery.
6. A charger comprises a control unit, a charging unit for charging a rechargeable battery, a temperature detection unit and a storage unit, wherein a conversion timing value and a conversion current value are stored in the storage unit, and the charger is characterized in that the control unit adjusts the conversion timing value and the conversion current value in the storage unit according to the temperature acquired by the temperature detection unit, when the temperature acquired by the detection unit is reduced, the conversion current value stored in the storage unit is reduced, and the conversion timing value stored in the storage unit is increased.
7. The charger according to claim 6, wherein said charging unit includes a rapid charging, a constant voltage charging and an equalizing charging, said control unit adjusts a voltage value of said constant voltage charging in accordance with the temperature acquired by said detection unit, and said voltage value of said constant voltage charging increases when the acquired temperature decreases.
8. The battery charger according to claim 6, further comprising a comparing unit, a current detecting unit, said comparing unit being adapted to compare a current value obtained by said current detecting unit with said set changeover current value, said control unit being adapted to control said charging unit when said current value obtained by said current detecting unit reaches said set changeover current value or a changeover timing value of said storage unit.
9. A charger according to claim 8, further comprising a constant-voltage timer unit, said comparing unit further for comparing a timer value of said constant-voltage timer unit with said set changeover timer value, said control unit for controlling said charging unit when a current value obtained by said current detecting unit reaches said set changeover current value or a timer value of said constant-voltage timer unit reaches said set changeover timer value.
10. A charger according to claim 6, wherein said storage unit for storing said converted count time value is a timer.
11. The charger according to claim 6, wherein said storage unit includes a changeover timing value storage unit in which a changeover timing value is stored and a changeover current value storage unit in which a changeover current value is stored.
12. A charger as claimed in claim 6, characterised in that the charger is adapted to charge a lead-acid battery.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211618007.0A CN115765113A (en) | 2022-12-15 | 2022-12-15 | Charger and charging method thereof |
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| CN202211618007.0A CN115765113A (en) | 2022-12-15 | 2022-12-15 | Charger and charging method thereof |
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| CN115765113A true CN115765113A (en) | 2023-03-07 |
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Citations (7)
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| CN1753241A (en) * | 2005-09-23 | 2006-03-29 | 周明明 | High voltage time limit charging method |
| CN107666167A (en) * | 2017-11-21 | 2018-02-06 | 深圳市森树强电子科技有限公司 | A kind of novel three-stage charging management method and device |
| CN112087018A (en) * | 2019-12-09 | 2020-12-15 | 超威电源集团有限公司 | Charger and charging method thereof |
| CN113381491A (en) * | 2021-04-19 | 2021-09-10 | 超威电源集团有限公司 | Charger and charging method thereof |
| CN113381490A (en) * | 2021-04-19 | 2021-09-10 | 超威电源集团有限公司 | Charger and charging method thereof |
| CN113964896A (en) * | 2021-09-30 | 2022-01-21 | 杭州铅锂智行科技有限公司 | Charger and charging method thereof |
| CN113964895A (en) * | 2021-09-30 | 2022-01-21 | 杭州铅锂智行科技有限公司 | Charger and charging method thereof |
-
2022
- 2022-12-15 CN CN202211618007.0A patent/CN115765113A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1753241A (en) * | 2005-09-23 | 2006-03-29 | 周明明 | High voltage time limit charging method |
| CN107666167A (en) * | 2017-11-21 | 2018-02-06 | 深圳市森树强电子科技有限公司 | A kind of novel three-stage charging management method and device |
| CN112087018A (en) * | 2019-12-09 | 2020-12-15 | 超威电源集团有限公司 | Charger and charging method thereof |
| CN113381491A (en) * | 2021-04-19 | 2021-09-10 | 超威电源集团有限公司 | Charger and charging method thereof |
| CN113381490A (en) * | 2021-04-19 | 2021-09-10 | 超威电源集团有限公司 | Charger and charging method thereof |
| CN113964896A (en) * | 2021-09-30 | 2022-01-21 | 杭州铅锂智行科技有限公司 | Charger and charging method thereof |
| CN113964895A (en) * | 2021-09-30 | 2022-01-21 | 杭州铅锂智行科技有限公司 | Charger and charging method thereof |
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