CN214626419U - Charging device and charging system - Google Patents
Charging device and charging system Download PDFInfo
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- CN214626419U CN214626419U CN202120393682.2U CN202120393682U CN214626419U CN 214626419 U CN214626419 U CN 214626419U CN 202120393682 U CN202120393682 U CN 202120393682U CN 214626419 U CN214626419 U CN 214626419U
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Abstract
An embodiment of the utility model provides a charging device and charging system, wherein, this charging device includes: the charging control module comprises a detection end and an output end, wherein the output end is configured to be connected with target equipment to be charged, the detection end is configured to detect the voltage of the target equipment, and the charging control module is configured to determine a charging mode based on the voltage detected by the detection end and charge the target equipment through the output end according to the charging mode; and the constant voltage module is connected with the detection end and used for providing preset voltage for the detection end so as to keep the voltage detected by the detection end at the preset voltage. Through the utility model discloses, solved the poor problem of charging device's the charging effect that exists among the correlation technique, reached the effect that improves charging device charging effect.
Description
Technical Field
The embodiment of the utility model provides a relate to the electron field, particularly, relate to a charging device and charging system.
Background
In the related art, when the target device is charged by the charging device, a plurality of charging methods may be adopted, and the target device is taken as a super capacitor as an example for description:
the super capacitor is widely applied due to the advantages of high power density, high charging speed, high capacity, good reversibility, long service life and the like, gradually replaces the traditional lithium battery, and fully exerts the advantages of more charging and discharging times, long storage time, no need of regular maintenance and the like of the super capacitor. A series of mature lithium battery charging ICs are derived from mature application of the lithium battery, and have the functions of input/output current limiting, pre-charging, constant current, constant voltage, short-circuit protection and the like, meanwhile, some charging ICs are derived from wide application of the super capacitor, but the functions are not fully completed, and the charging of a plurality of series capacitors cannot be well coped with. In practical application, a plurality of super capacitors are required to be connected in series to provide higher working voltage and energy.
In the related art, there are various charging methods, for example, a constant voltage charging method, a constant current charging method, a constant power charging method, and an MCU acquisition control method; in the constant voltage charging method, a large current flows through a capacitor in the initial charging state, so that the falling of active substances of a polar plate and the loss of electric energy are caused; the constant current charging method also continuously charges the capacitor after the charging is finished, and the electrode voltage exceeds the maximum allowable voltage, so that the electrolyte is separated out of bubbles; when the initial voltage is lower, the constant power charging method enables the charging current to be larger, and the load capacity of the charging power supply is influenced; although the MCU acquisition control method can accurately control, the MCU needs to intervene, the circuit is complex, and the cost is high.
Therefore, the charging effect of the charging device is poor in the related art.
In view of the above problems in the related art, no effective solution has been proposed.
SUMMERY OF THE UTILITY MODEL
An embodiment of the utility model provides a charging device and charging system to solve the poor problem of charging device's the charging effect that exists among the correlation technique at least.
According to the utility model discloses an embodiment provides a charging device, include: a charging control module including a detection terminal and an output terminal, wherein the output terminal is configured to be connected to a target device to be charged, the detection terminal is configured to detect a voltage of the target device, the charging control module is configured to determine a charging mode based on the voltage detected by the detection terminal, and charge the target device through the output terminal according to the charging mode; and the constant voltage module is connected with the detection end and used for providing preset voltage for the detection end so as to keep the voltage detected by the detection end to be the preset voltage.
According to another embodiment of the present invention, there is provided a charging system, including: the charging device, the target device, and the power supply device; the power supply equipment is connected with the charging control module and used for supplying power to the charging control module, and the charging device is connected with the target equipment.
Through the utility model discloses, the control module that charges includes sense terminal and output, and the output is cooperated to be connected for the target device who treats charging, and the sense terminal is configured to the voltage that detects the target device, and the control module that charges can be based on the voltage determination charge mode that the sense terminal detected to charge for the target device according to the charge mode, constant voltage module is connected with the sense terminal for provide preset voltage to the sense terminal, so that the voltage that the sense terminal detected keeps for preset voltage. Because the constant voltage module can provide preset voltage to the sense terminal, the sense terminal can detect out preset voltage, and the charge control module can confirm the voltage of target device according to preset voltage to confirm the charge mode, and charge for the target device through the charge mode who determines. Therefore, the problem that the charging effect of the charging device is poor in the related art can be solved, and the effect of improving the charging effect of the charging device is achieved.
Drawings
Fig. 1 is a schematic view of a charging device according to an embodiment of the present invention;
fig. 2 is a schematic view of a charging device according to an exemplary embodiment of the present invention;
fig. 3 is a schematic diagram of a conventional lithium battery charging curve according to an exemplary embodiment of the present invention;
fig. 4 is a charging graph of a charging device according to an exemplary embodiment of the present invention.
Detailed Description
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings in conjunction with the embodiments.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
In this embodiment, a charging device is provided, fig. 1 is a schematic diagram of a charging device according to an embodiment of the present invention, as shown in fig. 1, the process includes:
a charging control module 12, including a detection terminal and an output terminal, wherein the output terminal is configured to be connected to a target device to be charged, the detection terminal is configured to detect a voltage of the target device, the charging control module is configured to determine a charging mode based on the voltage detected by the detection terminal, and charge the target device through the output terminal according to the charging mode;
and the constant voltage module 14 is connected with the detection end and used for providing preset voltage for the detection end so as to keep the voltage detected by the detection end at the preset voltage.
In the above embodiment, the target device may be a super capacitor, and when the target device is the super capacitor, the charging control module may include a lithium battery charging IC controller and a charging voltage setting circuit, and an output end of the charging control module may be connected to an anode of the super capacitor. The charging control module may further comprise an input, which may be connected to a power supply. The detection terminal Fb of the charging control module may determine the charging mode according to the voltage of the target device by detecting the voltage of the target device. The detection end can be directly connected with the target device to detect the voltage of the target device, and the voltage of the target device can also be detected in an indirect connection mode. The charging mode may include a pre-charging mode, a constant current mode, a constant voltage mode.
In the above embodiment, the constant voltage module may be a constant current control module, and the constant current control module is connected to the detection terminal and configured to provide a preset voltage to the detection terminal, so that the detected voltage is maintained at the preset voltage. The preset voltage may be determined according to the charging control module. For example, when the charging control module includes a lithium battery charging IC controller, the preset voltage may be determined according to a reference voltage and an attribute of the lithium battery charging IC controller. When the voltage detected by the Fb end is less than a first threshold value, the charging mode of the charging control module is a pre-charging mode, when the voltage detected by the Fb end is greater than the first threshold value, the charging mode of the charging control module is a constant current mode, and when the output voltage of the charging control module reaches a preset voltage, the charging mode of the charging control module is a constant voltage mode. Since the charging mode of the lithium battery charging IC controller includes the precharge mode, the charging speed is slow in the precharge mode. Therefore, the voltage detected by the Fb end is larger than the first threshold value, the charging mode is directly changed into the constant current mode, and the charging speed can be improved. Therefore, the preset voltage may be set to be greater than the first threshold value and less than the reference voltage of the lithium battery charging IC controller.
Through the utility model discloses, the control module that charges includes sense terminal and output, and the output is cooperated to be connected for the target device who treats charging, and the sense terminal is configured to the voltage that detects the target device, and the control module that charges can be based on the voltage determination charge mode that the sense terminal detected to charge for the target device according to the charge mode, constant voltage module is connected with the sense terminal for provide preset voltage to the sense terminal, so that the voltage that the sense terminal detected keeps for preset voltage. Because the constant voltage module can provide preset voltage to the sense terminal, the sense terminal can detect out preset voltage, and the charge control module can confirm the voltage of target device according to preset voltage to confirm the charge mode, and charge for the target device through the charge mode who determines. Therefore, the problem that the charging effect of the charging device is poor in the related art can be solved, and the effect of improving the charging effect of the charging device is achieved.
In an exemplary embodiment, the constant voltage module includes an operational amplifier and a dc power supply, an anode of the dc power supply is connected to a first input terminal of the operational amplifier, and an output terminal of the operational amplifier and a second input terminal of the operational amplifier are both connected to the detection terminal. In this embodiment, the constant voltage module may include an operational amplifier, and a dc power supply, an anode of the dc power supply is connected to a first input terminal of the operational amplifier, an output terminal of the operational amplifier is connected to a second input terminal of the operational amplifier, and an output terminal of the operational amplifier and the second input terminal of the operational amplifier are both connected to the detection terminal of the charging control module. Therefore, the detection terminal can acquire the preset voltage output by the operational amplifier, so as to determine the charging mode. The operational amplifier can be a rail-to-rail high-precision operational amplifier, outputs constant voltage and feeds the constant voltage back to the charging control module.
In an exemplary embodiment, the constant voltage module further includes a diode, wherein an output terminal of the operational amplifier is connected to the detection terminal through the diode, an input terminal of the diode is connected to an output terminal of the operational amplifier, and an output terminal of the diode is connected to the detection terminal. In this embodiment, a diode may be connected between the output terminal of the operational amplifier and the detection terminal of the charging control module, the input terminal, i.e., the positive electrode, of the diode may be connected to the output terminal of the operational amplifier, and the output terminal, i.e., the negative electrode, of the diode may be connected to the detection terminal.
In an exemplary embodiment, the constant voltage module further includes a first resistor and a second resistor, wherein a first end of the first resistor is connected to the positive electrode of the dc power supply, a second end of the first resistor is connected to a first end of the second resistor and a first input terminal of the operational amplifier, and a second end of the second resistor is grounded. In this embodiment, the constant voltage module may further include a first resistor and a second resistor, a first end of the first resistor is connected to the dc power supply, a second end of the first resistor is connected to the first end of the second resistor and the first input end of the operational amplifier, and a second end of the second resistor is grounded. After the first resistor is connected with a direct current power supply to form a path, preset voltage can be output by adjusting the resistance ratio of the first resistor and the second resistor. That is, after the preset voltage is determined according to the reference voltage and the attribute of the charging control module, the voltage output by the constant voltage module may be the preset voltage by adjusting the resistance ratio of the first resistor and the second resistor.
In one exemplary embodiment, the first resistance and/or the second resistance is a variable resistance. In this embodiment, the first resistor and the second resistor may be variable resistors, or one of the first resistor and the second resistor may be a variable resistor, so that the constant voltage module may output different preset voltages.
In an exemplary embodiment, the charging apparatus further includes a third resistor and a fourth resistor, a first terminal of the third resistor is connected to the output terminal, a first terminal of the third resistor is further configured to be connected to the positive electrode of the target device, a second terminal of the third resistor is connected to the first terminal of the fourth resistor and the detection terminal, and a second terminal of the fourth resistor is grounded. In this embodiment, the charging device may further include a third resistor and a fourth resistor, a first end of the third resistor is connected to the output terminal of the charging control module, a first end of the third resistor is further configured to be connected to the positive electrode of the target device, a second end of the third resistor is connected to the first end of the fourth resistor and the detection terminal, and a second end of the fourth resistor is grounded. Referring to fig. 2, as shown in fig. 2, the charging device is the same as a normal lithium battery charging IC circuit, the charging power supply is connected to the input end of the charging control module, the output end of the charging control module is connected to the super capacitor, and meanwhile, the output voltage Vout is adjusted according to the value relation Vset1 of the Fb control signal configuration R3 and R4, so as to adapt to application scenarios under different series super capacitors. The Fb terminal is forcibly injected with a fixed voltage (corresponding to the preset voltage) according to the configuration relation Vset of R1 and R2, the judgment of the pre-charging condition of the charging control module is broken, and the constant current charging mode is directly entered.
In the above embodiments, the normal lithium battery charging IC includes a pre-charging mode, a constant current mode, and a constant voltage mode, and the charging IC can control what charging mode the IC is in according to the voltage at Fb. A schematic diagram of a conventional lithium battery charging curve can be seen in fig. 3. The Fb reference can be 1.25V, and when Fb is less than 0.825V, the charging module is in the precharge mode, and the charging IC is charged with a constant current of 20%, i.e. the section a of the charging curve in fig. 3; when the super capacitor voltage increases with the charging, Fb is greater than 0.825V, at this time, the IC enters a constant current charging mode, i.e., a section B of the charging curve in fig. 3; when the voltage difference is decreased after the preset Vout value is reached, the charging current gradually decreases, and is in the constant voltage charging mode, i.e. the C terminal of the charging curve in fig. 3. In this embodiment, the precharge mode can be eliminated by the injected preset voltage Vset, which has the following relationship with the threshold: 0.825V < Vset < 1.25V, i.e. the value of the preset voltage should be greater than the threshold for entering the pre-charge mode and less than the reference voltage of the charge control module, for example, the preset voltage may be 1V. Referring to fig. 4, after 1V is injected, charging is started, and the condition that 0.825V is greater than Vset and less than 1.25V is satisfied, the charging control IC directly enters a constant current charging mode, i.e., the charging curve B end in fig. 4, and finally the rapid charging voltage of the super capacitor rises to reach the Vout value, and after the voltage rise of the Fb end is greater than Vset, the actual voltage is taken as the reference, and finally the voltage approaches 1.25V, and the charging device enters a constant voltage charging mode. The charging control module comprises but is not limited to JW3655E, and the constant current control module comprises but is not limited to SGM8591YN 5G/TR.
In the above embodiment, the relationship between the preset voltage and the voltages of the first resistor, the second resistor and the dc power input may be
After the desired Vset is determined, the Vset may be output by adjusting the first resistance, the second resistance, and the voltage of the dc power input. The relationship between the output voltage and the third and fourth resistors may be
Where C is a reference voltage of the detection terminal of the charging control module, for example, 1.25V. The output voltage may be determined according to the number of target devices. After the output voltage is determined, the resistance values of the third resistor and the fourth resistor may be adjusted so that the charging control module outputs the output voltage.
It should be noted that the reference voltage and the trigger voltage entering different charging modes are only an exemplary illustration, and the present invention does not limit the voltage.
In one exemplary embodiment, the third resistor and/or the fourth resistor is a variable resistor. In this embodiment, the third resistor and the fourth resistor may both be variable resistors, or one of the third resistor and the fourth resistor may be a variable resistor, so that the charging control module may output different voltages to charge different target devices.
In this embodiment, a charging system is further provided, including the charging apparatus, the target device, and the power supply device described in any one of the above embodiments; the power supply equipment is connected with the charging control module and used for supplying power to the charging control module, and the charging device is connected with the target equipment. In this embodiment, the power supply device may be connected to the charging control module to supply power to the charging control module, and the charging control module is connected to the target device to charge the target device.
In one exemplary embodiment, the target device includes a super capacitor. In this embodiment, the target device may be a super capacitor, for example, a super capacitor in OPS delayed shutdown.
In one exemplary embodiment, the number of the super capacitors is plural, and the plurality of the super capacitors are connected in series. In this embodiment, the target device may include a plurality of super capacitors, the super capacitors are connected in series, different numbers of the super capacitors connected in series correspond to different output voltages, and output of different output voltages may be achieved by adjusting a configuration relationship between the third resistor and the fourth resistor.
In the foregoing embodiment, the pre-charge mode in the lithium battery charging process (pre-charge mode, constant current mode, and constant voltage mode) is broken by adding a simple circuit, so as to form a charging mode suitable for the super capacitor, thereby implementing fast and stable charging of the super capacitor and shortening the charging time. And the charging efficiency is high, the abnormal protection function is perfect, and the technical maturity is high.
It will be apparent to those skilled in the art that the modules or steps of the present invention described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, they may be implemented by program code executable by a computing device, and thus, may be stored in a memory device and executed by a computing device, and in some cases, the steps shown or described may be performed in a different order than that shown or described herein, or may be separately fabricated into individual integrated circuit modules, or may be fabricated with multiple modules or steps into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A charging device, comprising:
a charging control module including a detection terminal and an output terminal, wherein the output terminal is configured to be connected to a target device to be charged, the detection terminal is configured to detect a voltage of the target device, the charging control module is configured to determine a charging mode based on the voltage detected by the detection terminal, and charge the target device through the output terminal according to the charging mode;
and the constant voltage module is connected with the detection end and used for providing preset voltage for the detection end so as to keep the voltage detected by the detection end to be the preset voltage.
2. The charging device of claim 1, wherein the constant voltage module comprises an operational amplifier and a dc power supply, wherein a positive electrode of the dc power supply is connected to a first input terminal of the operational amplifier, and an output terminal of the operational amplifier and a second input terminal of the operational amplifier are both connected to the detection terminal.
3. The charging device as claimed in claim 2, wherein the constant voltage module further comprises a diode, wherein the output terminal of the operational amplifier is connected to the detection terminal through the diode, the input terminal of the diode is connected to the output terminal of the operational amplifier, and the output terminal of the diode is connected to the detection terminal.
4. The charging device of claim 2, wherein the constant voltage module further comprises a first resistor and a second resistor, wherein a first terminal of the first resistor is connected to the positive electrode of the dc power supply, a second terminal of the first resistor is connected to a first terminal of the second resistor and the first input terminal of the operational amplifier, and a second terminal of the second resistor is connected to ground.
5. A charging arrangement as claimed in claim 4, in which the first and/or second resistance is a variable resistance.
6. The charging apparatus according to any one of claims 1 to 5, further comprising a third resistor and a fourth resistor, wherein a first terminal of the third resistor is connected to the output terminal, the first terminal of the third resistor is further configured to be connected to the positive electrode of the target device, a second terminal of the third resistor is connected to the first terminal of the fourth resistor and the detection terminal, and a second terminal of the fourth resistor is connected to ground.
7. A charging arrangement as claimed in claim 6, in which the third and/or fourth resistors are variable resistors.
8. An electrical charging system, comprising:
the charging apparatus, the target device, and the power supply device according to any one of claims 1 to 7;
the power supply equipment is connected with the charging control module and used for supplying power to the charging control module, and the charging device is connected with the target equipment.
9. The charging system of claim 8, wherein the target device comprises a super capacitor.
10. The charging system according to claim 9, wherein the number of the super capacitors is plural, and the plural super capacitors are connected in series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120393682.2U CN214626419U (en) | 2021-02-22 | 2021-02-22 | Charging device and charging system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120393682.2U CN214626419U (en) | 2021-02-22 | 2021-02-22 | Charging device and charging system |
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| CN214626419U true CN214626419U (en) | 2021-11-05 |
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| CN202120393682.2U Active CN214626419U (en) | 2021-02-22 | 2021-02-22 | Charging device and charging system |
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