CN108092365B - Battery charger for measuring and evaluating charge quantity - Google Patents
Battery charger for measuring and evaluating charge quantity Download PDFInfo
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- CN108092365B CN108092365B CN201810021402.8A CN201810021402A CN108092365B CN 108092365 B CN108092365 B CN 108092365B CN 201810021402 A CN201810021402 A CN 201810021402A CN 108092365 B CN108092365 B CN 108092365B
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- battery
- charging
- control module
- current
- switching device
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- 238000007600 charging Methods 0.000 claims abstract description 63
- 238000007599 discharging Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 11
- 238000011156 evaluation Methods 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims description 2
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 abstract description 3
- 238000004134 energy conservation Methods 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 238000010280 constant potential charging Methods 0.000 description 3
- 238000010277 constant-current charging Methods 0.000 description 3
- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 210000004556 brain Anatomy 0.000 description 1
- 238000010281 constant-current constant-voltage charging Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052987 metal hydride Inorganic materials 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
Images
Classifications
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- H02J7/0021—
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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
- H01M10/4207—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells for several batteries or cells simultaneously or sequentially
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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
- H01M10/4285—Testing apparatus
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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
Abstract
The invention discloses a battery charger for evaluating the electric quantity, which comprises a battery cabin, a voltage sensor, a current sensor, a charging module, a control module and a load for evaluating the electric quantity of a battery, wherein the voltage sensor is used for detecting the electric quantity of the battery; the charging output end of the charging module is connected with the switching device K1 and then connected with the current sensor in series and then connected to the electrode of the battery, the voltage sensor is connected to the electrode of the battery, the output ends of the current sensor and the voltage sensor are connected to the input port of the control module, the load is connected with the switching device K2 in series and then connected with the two ends of the voltage sensor, and the control ends of the switching device K1 and the switching device K2 are respectively connected with the output port of the control module. Through the electric quantity evaluating function, a user can timely master the current actual electric quantity of each battery so as to judge whether the battery reaches a state needing to be replaced. The function is beneficial to reducing unnecessary waste of batteries, energy conservation and emission reduction and environmental protection.
Description
Technical Field
The invention relates to a battery charger, in particular to a battery charger with an electric quantity evaluating function.
Background
Many electronic toys, digital products, etc. use rechargeable secondary batteries, and naturally, the battery charger cannot be removed. Charging can be roughly classified into internal charging and external charging, depending on the type of charging. The built-in type is that the battery is left in the electronic product, the output of the transformer is connected with the electronic product, and the battery is not detached in the charging process; the external battery is disassembled from the electronic product and then placed in the charger for charging.
Currently, a common external charger is oriented to a rechargeable battery, such as a rechargeable battery of No. five (AAA) or No. 7 (AA), and can charge 4 rechargeable batteries simultaneously. The external charger is usually only provided with a plurality of LED indicating lamps, and when a battery is placed in a certain charging grid and is in a charging state, the indicating lamps are lightened; and when the battery is not placed or is fully charged, the indicator light is turned off.
The existing inconsistency of the battery is, for example, 4 rechargeable batteries with a nominal electric quantity of 1000mAh, after the rechargeable batteries are used for half a year, the current actual electric quantities of the batteries are respectively 900mAh, 950mAh, 850mAh and 500mAh through evaluation, as the batteries are often used in series and have a short plate effect, if the above 4 batteries are used in series, the limitation of the battery with the minimum electric quantity is caused, the actual overall electric quantity is only 500mAh, and only half of the nominal electric quantity is obtained. Since the specific performance of each battery is unknown, the measures taken by the user at this time are usually to eliminate 4 batteries together, which causes huge waste.
Disclosure of Invention
In view of the above-mentioned deficiencies of the prior art, the present invention provides a battery charger with power evaluation, which enables a user to grasp the current actual power of each battery while fully charging the battery during use, so as to determine whether the battery is in a state of needing to be replaced.
The present invention achieves the above object by:
the battery charger with the electric quantity evaluation comprises a battery bin, a voltage sensor, a current sensor, a charging module, a control module and a load for evaluating the electric quantity of the battery; the charging output end of the charging module is connected with the switching device K1 and then connected with the current sensor in series and then connected to the electrode of the battery, the voltage sensor is connected to the electrode of the battery, the output ends of the current sensor and the voltage sensor are connected to the input port of the control module, the load is connected with the switching device K2 in series and then connected with the two ends of the voltage sensor, and the control ends of the switching device K1 and the switching device K2 are respectively connected with the output port of the control module.
The battery charging system is characterized by also comprising a display module for displaying the charging state of the battery and the electric quantity information of the battery, wherein the display module is connected with the output port of the control module.
The control module is provided with a control module, a control module and a mode selection button, wherein the mode selection button is also arranged and is connected with the input port of the control module.
The invention has the beneficial effects that: the control module controls the charging module to perform constant-current constant-voltage charging on the batteries in parallel until the current on each charging loop is smaller than a threshold value, the load is controlled to work by the control module in the electric quantity evaluation function, the batteries perform constant-current discharging on the loads in parallel when the electric quantity is evaluated, and the control module calculates the existing electric quantity of the batteries by collecting current and voltage data in the discharging process. Through the electric quantity evaluating function, a user can timely master the current actual electric quantity of each battery so as to judge whether the battery reaches a state needing to be replaced. The function is beneficial to reducing unnecessary waste of batteries, energy conservation and emission reduction and environmental protection.
Drawings
The invention is further described below with reference to the accompanying drawings:
FIG. 1 is a functional block diagram of the present invention;
FIG. 2 is a flowchart illustrating the operation of the normal charging mode of the present invention;
fig. 3 is a flow chart of the operation of the charging mode with charge evaluation function according to the present invention.
Detailed Description
As shown in fig. 1, the battery charger for measuring and evaluating the charge amount includes a battery compartment, a voltage sensor, a current sensor, a charging module, a load, a control module, a user mode selection button and a display module; a voltage sensor is arranged between the positive pole and the negative pole of the battery compartment, the voltage at the two ends of the battery is monitored, and the voltage monitoring result is transmitted to the control module. A current sensor is configured on a charging loop of each battery, the charging and discharging current of each loop is monitored, and the monitoring result is transmitted to the control module. The charging module customizes a direct current power supply according to the charging characteristics of the battery and is responsible for converting 220V alternating current power supply into direct current output, and the output voltage of the power supply is determined according to the type of the charged battery. Currently, the general rechargeable secondary battery is a nickel-metal hydride battery or a nickel-cadmium battery, the rated voltage is 1.2V, and the charging voltage can be set to about 1.35V to ensure that the battery can be fully charged and not overcharged.
The user mode selection button comprises a common charging mode and a charging mode with a charge quantity evaluating function, and the user selects which mode is required to be used currently to charge the battery through the mode selection button. The load is a resistive component and is used for finishing the discharging process of the battery in a charging mode with a charge quantity evaluating function. The control module is realized by a singlechip and a peripheral auxiliary circuit thereof. The control module is used as the brain of the whole charger and is responsible for receiving and processing various input information, controlling the charging and electric quantity evaluating processes, transmitting battery information to the display module and informing a user.
The control module controls the charging module to perform constant-current and constant-voltage charging on the battery in parallel until the current on each charging loop is smaller than a threshold value. The charging mode with the charge quantity evaluation function has the working mode that the control module controls the load to work, constant current discharging is conducted on the batteries in parallel, a discharging voltage threshold value needs to be set for ensuring that the batteries cannot be over discharged, and discharging is stopped when the parallel voltage of the batteries is lower than the threshold value. The threshold value may be set according to the type of battery, and if the rechargeable secondary battery type is a nickel-hydrogen battery or a nickel-cadmium battery, the discharge cutoff voltage may be set to 0.8V. And then the control module controls the charging module to perform constant-current and constant-voltage charging on the batteries in parallel until the current on each charging loop is smaller than a threshold value. After charging, the control module transmits the charging electric quantity obtained by current accumulation to the display module to inform a user.
The main working process of the battery charger for measuring the charge quantity is as follows:
(1) in the normal charging mode, referring to fig. 2, the switching device K1 is closed to perform constant-current and constant-voltage charging on the battery in parallel, and as the charge in the battery gradually approaches saturation, the corresponding current on the charging loop will become smaller and smaller. And setting a detected current threshold value Icharge, if the current on each charging loop is less than Icharge, indicating that all the batteries are fully charged, and turning off the charging control switch device K1 to finish charging.
(2) And under the charging mode with the electric quantity evaluating function, the control module starts a corresponding working mode. This mode can be considered as a combination of a discharge process and a charge process.
In the initialization stage of the program, referring to fig. 3, the battery capacities Q1, Q2, Q3, and Q4 are all cleared, so that the last evaluation result is prevented from affecting the current time. And then closing the switching device K2, and enabling the batteries to enter a discharging state until all the batteries are emptied, wherein the corresponding current on the charging loop is smaller and smaller as the charges carried in the batteries are gradually close to emptying, and the basis for judging that the batteries are emptied is to set a threshold value Udischarge of voltage detection because the discharging current cannot be 0, and if the parallel voltage is less than the Udischarge, the situation indicates that all the batteries are emptied.
Thereafter the switching device K2 is opened and the switching device K1 is closed and the battery enters the charging phase. During the charging phase, the charging current flowing through each battery is converted into a battery capacity, and is added to the battery capacities Q1, Q2, Q3 and Q4. As in the "normal charging mode", the condition for determining the end of the charging process is that the current on each charging loop is smaller than I charge, i.e. the battery is fully charged. At this time, the switching devices K1 and K2 are both turned off, and the control module displays the accumulated battery capacities Q1, Q2, Q3 and Q4 to the user through the display module, so that the user knows the battery capacity.
Claims (3)
1. The battery charger for measuring the charge quantity is characterized in that: the device comprises a battery compartment, a voltage sensor A, a current sensor V, a charging module, a control module and a load for evaluating the electric quantity of a battery; the charging output end of the charging module is connected with a switching device K1, then is connected with a current sensor in series and then is connected to the electrode of the battery, a voltage sensor is connected to the electrode of the battery, the output ends of the current sensor and the voltage sensor are connected to the input port of the control module, the load is connected with the two ends of the voltage sensor in series after being connected with a switching device K2, and the control ends of the switching device K1 and the switching device K2 are respectively connected with the output port of the control module; under the charging mode with the electric quantity evaluating function, the control module starts a corresponding working mode; the mode is formed by combining a discharging process and a charging process; in the initialization stage of the program, the battery power Q1, Q2, Q3 and Q4 are all cleared, so that the influence of the last evaluation result on the current time is prevented; then, a switch device K2 is closed, the batteries enter a discharging state, the state is until all the batteries are emptied, corresponding current on a charging loop is smaller and smaller as charges in the batteries are gradually close to emptying, the discharging current cannot be 0, the basis for judging that the batteries are emptied is to set a threshold value Udischarge of voltage detection, and if the parallel voltage is smaller than the Udischarge, all the batteries are emptied; then the switching device K2 is opened, the switching device K1 is closed, and the battery enters a charging stage; in the charging phase, the charging current flowing through each battery is converted into electric quantity and is correspondingly added into the battery electric quantities Q1, Q2, Q3 and Q4; judging that the charging process is ended under the condition that the current on each charging loop is smaller than I charge, namely the battery is fully charged; at this time, the switching devices K1 and K2 are both turned off, and the control module displays the accumulated battery capacities Q1, Q2, Q3 and Q4 to the user through the display module, so that the user knows the battery capacity.
2. The battery charger for charge quantity evaluation according to claim 1, characterized in that: the display module is used for displaying the charging state of the battery and the electric quantity information of the battery and is connected with the output port of the control module.
3. The battery charger for charge quantity evaluation according to claim 1, characterized in that: and the mode selection button is connected with the input port of the control module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810021402.8A CN108092365B (en) | 2018-01-10 | 2018-01-10 | Battery charger for measuring and evaluating charge quantity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810021402.8A CN108092365B (en) | 2018-01-10 | 2018-01-10 | Battery charger for measuring and evaluating charge quantity |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108092365A CN108092365A (en) | 2018-05-29 |
| CN108092365B true CN108092365B (en) | 2022-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810021402.8A Active CN108092365B (en) | 2018-01-10 | 2018-01-10 | Battery charger for measuring and evaluating charge quantity |
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| CN (1) | CN108092365B (en) |
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| CN1747278A (en) * | 2005-10-21 | 2006-03-15 | 成都龙盾数码通信技术有限公司 | Circuit for controlling series battery charge and discharge |
| CN101976867A (en) * | 2010-10-21 | 2011-02-16 | 中山大学 | Special power battery management system for electric vehicle and implementation method thereof |
| CN102496991A (en) * | 2011-12-28 | 2012-06-13 | 南京双登科技发展研究院有限公司 | Backup lithium ion battery pack management method and management system thereof |
| CN103884993A (en) * | 2014-03-03 | 2014-06-25 | 中国东方电气集团有限公司 | SOC online detection and correction method for lithium ion battery in charging process |
| CN104656024A (en) * | 2013-11-22 | 2015-05-27 | 韩燕� | Method and device for detecting battery electric quantity and battery |
| CN107093776A (en) * | 2017-04-11 | 2017-08-25 | 歌尔科技有限公司 | Auto-correction method and device, the battery and unmanned plane of battery |
| CN206517119U (en) * | 2017-01-16 | 2017-09-22 | 吉林大学 | A kind of 12V lead acid batteries chargers |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014155921A1 (en) * | 2013-03-28 | 2014-10-02 | 三洋電機株式会社 | Secondary battery charge status estimation device and secondary battery charge status estimation method |
-
2018
- 2018-01-10 CN CN201810021402.8A patent/CN108092365B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1747278A (en) * | 2005-10-21 | 2006-03-15 | 成都龙盾数码通信技术有限公司 | Circuit for controlling series battery charge and discharge |
| CN101976867A (en) * | 2010-10-21 | 2011-02-16 | 中山大学 | Special power battery management system for electric vehicle and implementation method thereof |
| CN102496991A (en) * | 2011-12-28 | 2012-06-13 | 南京双登科技发展研究院有限公司 | Backup lithium ion battery pack management method and management system thereof |
| CN104656024A (en) * | 2013-11-22 | 2015-05-27 | 韩燕� | Method and device for detecting battery electric quantity and battery |
| CN103884993A (en) * | 2014-03-03 | 2014-06-25 | 中国东方电气集团有限公司 | SOC online detection and correction method for lithium ion battery in charging process |
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| CN108092365A (en) | 2018-05-29 |
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