CN217427733U - Automatic lithium battery charging voltage regulating circuit - Google Patents
Automatic lithium battery charging voltage regulating circuit Download PDFInfo
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- CN217427733U CN217427733U CN202221161406.4U CN202221161406U CN217427733U CN 217427733 U CN217427733 U CN 217427733U CN 202221161406 U CN202221161406 U CN 202221161406U CN 217427733 U CN217427733 U CN 217427733U
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The utility model discloses a lithium battery charging voltage automatic regulating circuit, which comprises a lithium battery charging protection module and a power supply voltage regulating output module, and is connected with a lithium battery pack through the lithium battery charging protection module so as to carry out charging and discharging protection control on the lithium battery pack; supply voltage adjusts output module with can dismantle electric connection between the lithium battery charging protection module, supply voltage adjusts output module and is used for under the voltage control signal control of the output of lithium battery charging protection module, the charging source who exports corresponding supply voltage does the lithium cell group supplies power. Thus, the output voltage of the charger is regulated and controlled so that the output voltage matches the voltage of the lithium battery pack. The unified charger can be guaranteed to realize charging to different lithium batteries, and the situation that the lithium battery pack cannot be charged or is burnt out during charging is avoided.
Description
Technical Field
The utility model relates to a lithium battery protection technical field especially relates to a lithium battery charging voltage automatic regulating circuit.
Background
In recent years, secondary batteries such as lithium (Li) ion batteries have been widely used. Lithium (Li) ion batteries typically require a charger to charge the lithium battery pack during use. In the prior art, a matched charger is usually used for charging the lithium battery pack. For example, a 12V lithium battery pack, which is generally charged only by a 12V charger. The existing lithium battery pack has various specifications. For example, 12V, 24V, 36V, etc. Therefore, different types of lithium battery packs need to select a matched charger to charge the lithium battery packs. When a non-matching charger is used to charge the lithium battery pack, the lithium battery pack may not be charged due to the non-matching of the charging voltages, or even burn out of the lithium battery pack.
SUMMERY OF THE UTILITY MODEL
The present invention aims at solving at least one of the technical problems in the related art to a certain extent. Therefore, an object of the present invention is to provide an automatic regulating circuit for charging voltage of lithium battery.
In order to achieve the above object, according to the utility model discloses lithium battery charging voltage automatically regulated circuit, include:
the lithium battery charging protection module is connected with the lithium battery pack so as to perform charging and discharging protection control on the lithium battery pack;
supply voltage adjusts output module, supply voltage adjust output module with can dismantle electric connection between the lithium battery charging protection module, supply voltage adjusts output module and is used for under the voltage control signal control of lithium battery charging protection module's output, the charging source who outputs corresponding supply voltage does the power supply of lithium cell group.
Further, according to an embodiment of the present invention, the supply voltage adjustment output module includes:
the voltage transformation circuit is used for transforming and outputting the input direct current;
the output filter circuit is connected with the voltage transformation circuit so as to filter a voltage transformation output power supply of the voltage transformation circuit into stable direct current and output the stable direct current;
the MOS switch tube is connected with the voltage transformation circuit to perform PWM pulse width adjustment on the voltage transformation circuit;
the PWM controller is connected with the MOS switching tube and is used for generating the PWM pulse width modulation signal;
the optocoupler feedback module is connected with the PWM controller so as to feed back the output voltage of the stable direct current to a voltage feedback end of the PWM controller;
the adjustable resistance voltage feedback module is connected with the optocoupler feedback module and used for being connected with a corresponding feedback resistor under the control of the lithium battery charging protection module.
Further, according to the utility model discloses an embodiment, adjustable resistance voltage feedback module includes:
the signal end of the channel selection switch is used for receiving a control signal of the lithium battery charging protection module;
a first resistor R6, one end of the first resistor R6 is connected to the output end of the output filter circuit, and the other end of the first resistor R6 is connected to the first channel end of the channel selection switch;
a second resistor R7, one end of the second resistor R7 is connected to the output end of the output filter circuit, and the other end of the second resistor R7 is connected to the second channel end of the channel selection switch;
a third resistor R8, one end of the third resistor R8 is connected to the output end of the output filter circuit, and the other end of the third resistor R8 is connected to the third channel end of the channel selection switch;
one end of the fourth resistor R9 is connected to the output end of the output filter circuit, and the other end of the fourth resistor R9 is connected to the fourth channel end of the channel selection switch;
one end of the fifth resistor R17 is connected with the common channel end of the channel selection switch, the other end of the fifth resistor R17 is connected with the reference ground, and the one end of the fifth resistor R17 is further connected with the optocoupler feedback module.
Further, according to an embodiment of the present invention, the voltage transformation circuit includes:
one end of a primary coil of the transformer is connected with the input direct current, the other end of the primary coil of the transformer is connected with the MOS switching tube, and a secondary coil of the transformer is connected with the output filter circuit;
a diode D1, an anode of the diode D1 being connected with the other end of the primary coil of the transformer;
a capacitor C1, one end of the capacitor C1 being connected to the cathode of the diode D1, the other end of the capacitor C1 being connected to the one end of the primary winding of the transformer;
a resistor R3, one end of the resistor R3 being connected to the cathode of the diode D1, the other end of the resistor R3 being connected to the one end of the primary coil of the transformer;
the diode D1, the capacitor C1 and the resistor R3 are used for absorbing spike signals generated by the transformer.
Further, according to the utility model discloses an embodiment, the opto-coupler feedback module includes:
an optocoupler U3, wherein a triode collector terminal of the optocoupler U3 is connected with a voltage feedback terminal of the PWM controller, a triode emitter terminal of the optocoupler U3 is connected with a reference ground, and a diode anode of the optocoupler U3 is connected with an output terminal of the output filter circuit through a resistor R16;
and a cathode of the three-terminal voltage comparator U6 is connected with a cathode of a diode of the optocoupler U3, an anode of the three-terminal voltage comparator is connected with a reference ground, and a comparison end of the three-terminal voltage comparator is connected with a common channel end of the channel selection switch.
Further, according to the utility model discloses an embodiment, lithium battery charging voltage automatically regulated circuit still includes the alternating current-direct current conversion module, the alternating current-direct current conversion module is used for converting the alternating current into input direct current.
Further, according to the utility model discloses an embodiment, lithium battery charging protection module includes:
the charge and discharge switch is respectively connected with the charge and discharge interface and the lithium battery pack;
the controller is connected with the charge and discharge switch so as to control the charge and discharge circuit of the lithium battery pack through the charge and discharge switch; the controller is further configured to output the voltage regulation control signal.
Further, according to an embodiment of the present invention, the lithium battery charging protection module further includes a temperature detection module, and the temperature detection module is used for detecting the temperature of the charging and discharging circuit;
the temperature detection module includes:
the resistor R15, one end of the said resistor R15 is connected with power supply;
thermistor RT0, thermistor RT 0's one end with resistance R15's the other end is connected, thermistor RT 0's the other end is connected with reference ground, thermistor RT0 the one end still with a voltage sampling end of controller is connected.
Further, according to an embodiment of the present invention, the lithium battery charging protection module further includes a charging and discharging interface, and the charging and discharging interface is respectively connected to the controller and the charging and discharging switch;
the power supply voltage regulation output module further comprises a charging interface, the charging interface is respectively connected with the output filter circuit and the channel selection switch so as to lead out a charging power supply and a channel regulation control interface of the channel selection switch, and the charging interface is detachably connected with the charging and discharging interface.
The embodiment of the utility model provides a lithium battery charging voltage automatic regulating circuit is connected with the lithium battery pack through the lithium battery charging protection module to carry out charging and discharging protection control on the lithium battery pack; supply voltage adjusts output module with can dismantle electric connection between the lithium battery charging protection module, supply voltage adjusts output module and is used for under the voltage regulation control signal control of lithium battery charging protection module's output, the charging source who outputs corresponding supply voltage does lithium cell group supplies power. Thus, the output voltage of the charger is regulated and controlled so that the output voltage matches the voltage of the lithium battery pack. The unified charger can be guaranteed to charge different lithium batteries, and the situation that the lithium battery pack cannot be charged or burnt out due to charging is avoided.
Drawings
Fig. 1 is a block diagram of an automatic lithium battery charging voltage regulating circuit according to an embodiment of the present invention;
fig. 2 is a circuit diagram of the automatic lithium battery charging voltage regulation circuit provided by the embodiment of the present invention.
Reference numerals:
the purpose of the present invention is to provide a portable electronic device, which can be easily and conveniently operated.
Detailed Description
In order to make the technical field person understand the scheme of the present invention better, the following will combine the drawings in the embodiments of the present invention to clearly and completely describe the technical scheme in the embodiments of the present invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
Referring to fig. 1, the utility model provides a lithium battery charging voltage automatic regulating circuit, include: the charging and discharging protection system comprises a lithium battery charging protection module and a power supply voltage regulating output module, wherein the lithium battery charging protection module is connected with a lithium battery pack so as to perform charging and discharging protection control on the lithium battery pack; the battery charging protection module is electrically and fixedly connected with the lithium battery pack. Therefore, the charging and discharging management and control of the lithium battery pack can be realized, and the lithium battery is protected.
The lithium battery pack power supply device comprises a lithium battery pack, a power supply voltage regulation and output module, a lithium battery charging protection module and a charging power supply, wherein the lithium battery pack is connected with the power supply voltage regulation and output module, the lithium battery charging protection module is connected with the power supply voltage regulation and output module, and the power supply voltage regulation and output module is electrically connected with the lithium battery charging protection module in a detachable mode. When the lithium battery pack is charged, the lithium battery pack needs to be charged by adopting the adaptive input voltage. In the embodiment of the utility model provides an in, supply voltage adjust output module with after lithium battery charging protection module interconnect. At this moment, the lithium battery charging protection module is according to the specification of this lithium cell group. And the output voltage regulation control signal is transmitted to the power supply voltage regulation output module. And the power supply voltage regulation output module outputs corresponding voltage according to the voltage regulation control signal. The voltage is matched with the specification of the lithium battery pack, so that the lithium battery pack can be charged. The unified charger can be guaranteed to realize charging to the lithium batteries of multiple different voltage specifications, and the situation that the lithium battery pack cannot be charged or burnt out during charging is avoided.
The embodiment of the utility model provides a lithium battery charging voltage automatic regulating circuit is connected with the lithium battery pack through the lithium battery charging protection module to carry out charging and discharging protection control on the lithium battery pack; supply voltage adjusts output module with can dismantle electric connection between the lithium battery charging protection module, supply voltage adjusts output module and is used for under the voltage regulation control signal control of lithium battery charging protection module's output, the charging source who outputs corresponding supply voltage does lithium cell group supplies power. Thus, the output voltage of the charger is regulated and controlled so that the output voltage matches the voltage of the lithium battery pack. The unified charger can be guaranteed to realize charging to the lithium batteries of multiple different voltage specifications, and the situation that the lithium battery pack cannot be charged or burnt out during charging is avoided.
Referring to fig. 1 and 2, the supply voltage regulation output module includes: the circuit comprises a voltage transformation circuit, an output filter circuit, an MOS (metal oxide semiconductor) switching tube, a PWM (pulse-width modulation) controller, an optocoupler feedback module and an adjustable resistance voltage feedback module, wherein the voltage transformation circuit is used for transforming and outputting input direct current; as shown in fig. 2, the voltage transformation circuit includes: the power supply comprises a transformer, a diode D1, a capacitor C1 and a resistor R3, wherein one end of a primary coil of the transformer is connected with the input direct current, the other end of the primary coil of the transformer is connected with the MOS switching tube, and a secondary coil of the transformer is connected with the output filter circuit; under the action of PWM pulse control signals of the MOS switching tube, the transformer can perform PWM pulse modulation on input direct current of a primary coil of the transformer, and then the direct current is transformed and output from a secondary coil of the transformer.
The anode of the diode D1 is connected to the other end of the primary winding of the transformer; one end of the capacitor C1 is connected to the cathode of the diode D1, and the other end of the capacitor C1 is connected to the one end of the primary coil of the transformer; one end of the resistor R3 is connected to the cathode of the diode D1, and the other end of the resistor R3 is connected to the one end of the primary coil of the transformer; the diode D1, the capacitor C1 and the resistor R3 are used for absorbing spike signals generated by the transformer. A peak absorption circuit is formed among the diode D1, the capacitor C1 and the resistor R3. Thereby absorbing the spike signal generated when the transformer is cut off. When the transformer is turned off, the spike generated enters the capacitor C1 and the resistor R3 through the diode D1. The spike is absorbed and dissipated through capacitor C1 and resistor R3. And the damage to the MOS switch tube is avoided.
The output filter circuit is connected with the voltage transformation circuit so as to filter a voltage transformation output power supply of the voltage transformation circuit into stable direct current and output the stable direct current; as shown in fig. 2, the output filter circuit includes a diode D2 and a capacitor C2, and the pulse dc power output from the secondary winding of the transformer is converted into stable dc power through the diode D2 and the capacitor C2.
The MOS switching tube is connected with the voltage transformation circuit to perform PWM pulse width adjustment on the voltage transformation circuit; the PWM controller is connected with the MOS switching tube and is used for generating the PWM signal; the PWM pulse width adjustment signal is generated by a PWM controller. The PWM pulse width adjusting signal is output to the base electrode of the MOS switch tube. And PWM pulse width modulation is carried out on the current of the primary coil of the transformer through the MOS switching tube.
The optocoupler feedback module is connected with the PWM controller so as to feed back the output voltage of the stable direct current to a voltage feedback end of the PWM controller; as shown in fig. 2, the optocoupler feedback module includes: the three-terminal voltage comparator U6 is connected with the optocoupler U3, a collector terminal of a triode of the optocoupler U3 is connected with a voltage feedback terminal of the PWM controller, an emitter terminal of a triode of the optocoupler U3 is connected with a reference ground, and a diode anode of the optocoupler U3 is connected with an output end of the output filter circuit through a resistor R16; the cathode of the three-terminal voltage comparator U6 is connected with the cathode of the diode of the optocoupler U3, the anode of the three-terminal voltage comparator is connected with reference ground, and the comparison end of the three-terminal voltage comparator is connected with the common channel end of the channel selection switch. The optical coupler U3 isolates and feeds back the output end and the input end. The output voltage of the output filter circuit can be fed back to the PWM controller through the optocoupler feedback module, so that the PWM controller can conveniently perform duty ratio modulation of PWM pulse width, and the stability of the output voltage is ensured.
The adjustable resistance voltage feedback module is connected with the optocoupler feedback module and used for being connected with a corresponding feedback resistor under the control of the lithium battery charging protection module. As shown in fig. 2, the adjustable resistance voltage feedback module includes: the lithium battery charging protection circuit comprises a channel selection switch, a first resistor R6, a second resistor R7, a third resistor R8, a fourth resistor R9 and a fifth resistor R17, wherein a signal end of the channel selection switch is used for receiving a control signal of the lithium battery charging protection module; one end of the first resistor R6 is connected with the output end of the output filter circuit, and the other end of the first resistor R6 is connected with the first channel end of the channel selection switch; one end of the second resistor R7 is connected with the output end of the output filter circuit, and the other end of the second resistor R7 is connected with the second channel end of the channel selection switch; one end of the third resistor R8 is connected with the output end of the output filter circuit, and the other end of the third resistor R8 is connected with the third channel end of the channel selection switch; one end of the fourth resistor R9 is connected to the output end of the output filter circuit, and the other end of the fourth resistor R9 is connected to the fourth channel end of the channel selection switch; one end of the fifth resistor R17 is connected with a common channel end of the channel selection switch, the other end of the fifth resistor R17 is connected with a reference ground, and the one end of the fifth resistor R17 is further connected with the optocoupler feedback module. And the control signal of the lithium battery charging protection module can be acquired through the channel selection switch. Any one of the first resistor R6, the second resistor R7, the third resistor R8 and the fourth resistor R9 is selected to be conducted and is connected with the fifth resistor R17 in series. In this way, the fifth resistor R17 and one of the first resistor R6, the second resistor R7, the third resistor R8 and the fourth resistor R9 form a series voltage dividing circuit. The output voltages can be respectively output to a voltage comparison end of a three-end voltage comparator U6 of the optocoupler feedback module. The first resistor R6, the second resistor R7, the third resistor R8 and the fourth resistor R9 are different in resistance value. Thus, the feedback voltages are also different. Feedback is isolated and output to a voltage feedback end of the PWM controller through the optocoupler feedback module, so that different preset voltage outputs can be realized through voltage division feedback of different resistance values. And the power supply voltage regulation output module outputs a voltage value matched with the lithium battery pack regulation.
The automatic lithium battery charging voltage regulating circuit further comprises an alternating current-direct current conversion module, and the alternating current-direct current conversion module is used for converting alternating current into input direct current. Alternating current can be converted into direct current through the alternating current-direct current conversion module, so that a power supply can be conveniently obtained from alternating current of commercial power.
The lithium battery charging protection module comprises: the charge and discharge switch and the controller are respectively connected with the charge and discharge interface and the lithium battery pack; the charging circuit loop can be controlled to be switched on or switched off through the charging and discharging switch.
The controller is connected with the charge and discharge switch so as to control the charge and discharge circuit of the lithium battery pack through the charge and discharge switch; the controller is further configured to output the voltage regulation control signal. And the controller is used for controlling the on or off of the charge and discharge switch. In addition, the controller outputs the voltage regulation control signal to the power supply voltage regulation output module through an interface, so that the power supply voltage regulation output module outputs an adaptive voltage value.
The lithium battery charging protection module also comprises a temperature detection module, and the temperature detection module is used for detecting the temperature of the charging and discharging loop; as shown in fig. 2, the temperature detection module includes: the resistance R15 and the thermistor RT0, one end of the resistance R15 is connected with a power supply; one end of the thermistor RT0 is connected with the other end of the resistor R15, the other end of the thermistor RT0 is connected with a reference ground, and the one end of the thermistor RT0 is also connected with a voltage sampling end of the controller. By the resistor R15 and the thermistor RT0 forming a series circuit, the voltage value of the thermistor RT0 can be changed correspondingly according to the change of the temperature. So that the divided voltage by the thermistor RT0 is also different. The controller reads the corresponding voltage value, can acquire the temperature value of return circuit, when the excess temperature appears, controls the closing of charge and discharge switch pipe through the controller to realize the excess temperature protection.
The lithium battery charging protection module also comprises a charging and discharging interface, and the charging and discharging interface is respectively connected with the controller and the charging and discharging switch; the power supply voltage regulation output module further comprises a charging interface, the charging interface is respectively connected with the output filter circuit and the channel selection switch so as to lead out a charging power supply and a channel regulation control interface of the channel selection switch, and the charging interface is detachably connected with the charging and discharging interface. As shown in fig. 2, the charging interface and the charging/discharging interface are respectively provided with a power end and a data end, the power end has a positive end and a negative end, and the data end has four signal ends. One of which is a channel enable terminal. After the enabling end is effective, the channel can be normally conducted. The other three are channel select ends. Channel selection is done by too high or too low a level. For example, 000 is the first channel conducting, and the first resistor R6 is switched in. 001 is the second channel conduction, the second resistance R7 is switched in.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing detailed description, or equivalent replacements may be made for some of the technical features of the embodiments. All utilize the equivalent structure that the specification and the attached drawing content of the utility model were done, direct or indirect application is in other relevant technical field, all the same reason is within the utility model discloses the patent protection within scope.
In the description of the present specification, reference to the description of "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present invention have been shown and described, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that changes, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the principles and spirit of the present invention.
Claims (9)
1. An automatic lithium battery charging voltage regulating circuit is characterized by comprising:
the lithium battery charging protection module is connected with the lithium battery pack so as to perform charging and discharging protection control on the lithium battery pack;
supply voltage adjusts output module, supply voltage adjust output module with can dismantle electric connection between the lithium battery charging protection module, supply voltage adjusts output module and is used for under the voltage control signal control of lithium battery charging protection module's output, the charging source who outputs corresponding supply voltage does the power supply of lithium cell group.
2. The lithium battery charging voltage automatic regulating circuit according to claim 1, wherein the supply voltage regulating output module comprises:
the voltage transformation circuit is used for transforming and outputting the input direct current;
the output filter circuit is connected with the voltage transformation circuit so as to filter a voltage transformation output power supply of the voltage transformation circuit into stable direct current and output the stable direct current;
the MOS switch tube is connected with the voltage transformation circuit to perform PWM pulse width adjustment on the voltage transformation circuit;
the PWM controller is connected with the MOS switching tube and is used for generating the PWM pulse width modulation signal;
the optocoupler feedback module is connected with the PWM controller so as to feed back the output voltage of the stable direct current to a voltage feedback end of the PWM controller;
and the adjustable resistance voltage feedback module is connected with the optocoupler feedback module and is used for accessing corresponding feedback resistance under the control of the lithium battery charging protection module.
3. The automatic lithium battery charging voltage regulating circuit according to claim 2, wherein the adjustable resistance voltage feedback module comprises:
the signal end of the channel selection switch is used for receiving a control signal of the lithium battery charging protection module;
a first resistor R6, one end of the first resistor R6 is connected to the output end of the output filter circuit, and the other end of the first resistor R6 is connected to the first channel end of the channel selection switch;
one end of the second resistor R7 is connected to the output end of the output filter circuit, and the other end of the second resistor R7 is connected to the second channel end of the channel selection switch;
one end of the third resistor R8 is connected to the output end of the output filter circuit, and the other end of the third resistor R8 is connected to the third channel end of the channel selection switch;
one end of the fourth resistor R9 is connected to the output end of the output filter circuit, and the other end of the fourth resistor R9 is connected to the fourth channel end of the channel selection switch;
one end of the fifth resistor R17 is connected to the common channel end of the channel selection switch, the other end of the fifth resistor R17 is connected to the reference ground, and the one end of the fifth resistor R17 is further connected to the optocoupler feedback module.
4. The lithium battery charging voltage automatic regulating circuit according to claim 2, wherein the voltage transforming circuit comprises:
one end of a primary coil of the transformer is connected with the input direct current, the other end of the primary coil of the transformer is connected with the MOS switching tube, and a secondary coil of the transformer is connected with the output filter circuit;
a diode D1, an anode of the diode D1 being connected with the other end of the primary coil of the transformer;
a capacitor C1, one end of the capacitor C1 being connected to the cathode of the diode D1, the other end of the capacitor C1 being connected to the one end of the primary coil of the transformer;
a resistor R3, one end of the resistor R3 being connected to the cathode of the diode D1, the other end of the resistor R3 being connected to the one end of the primary coil of the transformer;
the diode D1, the capacitor C1 and the resistor R3 are used for absorbing spike signals generated by the transformer.
5. The automatic lithium battery charging voltage regulating circuit according to claim 3, wherein the optocoupler feedback module comprises:
an optocoupler U3, wherein a triode collector terminal of the optocoupler U3 is connected with a voltage feedback terminal of the PWM controller, a triode emitter terminal of the optocoupler U3 is connected with a reference ground, and a diode anode of the optocoupler U3 is connected with an output terminal of the output filter circuit through a resistor R16;
and a cathode of the three-terminal voltage comparator U6 is connected with a cathode of a diode of the optocoupler U3, an anode of the three-terminal voltage comparator is connected with a reference ground, and a comparison end of the three-terminal voltage comparator is connected with a common channel end of the channel selection switch.
6. The automatic lithium battery charging voltage regulation circuit of claim 2 further comprising an ac-to-dc conversion module for converting ac power to the input dc power.
7. The lithium battery charging voltage automatic regulating circuit according to claim 3, wherein the lithium battery charging protection module comprises:
the charge and discharge switch is respectively connected with the charge and discharge interface and the lithium battery pack;
the controller is connected with the charge and discharge switch so as to control the charge and discharge circuit of the lithium battery pack through the charge and discharge switch; the controller is further configured to output the voltage regulation control signal.
8. The lithium battery charging voltage automatic regulating circuit according to claim 7, wherein the lithium battery charging protection module further comprises a temperature detection module, and the temperature detection module is used for detecting the temperature of the charging and discharging loop;
the temperature detection module includes:
the resistor R15, one end of the said resistor R15 is connected with power supply;
thermistor RT0, thermistor RT 0's one end with resistance R15's the other end is connected, thermistor RT 0's the other end is connected with reference ground, thermistor RT0 the one end still with a voltage sampling end of controller is connected.
9. The lithium battery charging voltage automatic regulating circuit according to claim 8, wherein the lithium battery charging protection module further comprises a charging and discharging interface, and the charging and discharging interface is respectively connected with the controller and the charging and discharging switch;
the power supply voltage regulation output module further comprises a charging interface, the charging interface is respectively connected with the output filter circuit and the channel selection switch so as to lead out a charging power supply and a channel regulation control interface of the channel selection switch, and the charging interface is detachably connected with the charging and discharging interface.
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| CN202221161406.4U CN217427733U (en) | 2022-05-13 | 2022-05-13 | Automatic lithium battery charging voltage regulating circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116191631A (en) * | 2023-01-31 | 2023-05-30 | 深圳市凌鑫电子有限公司 | Low-cost power supply charging circuit |
| CN118412967A (en) * | 2024-06-25 | 2024-07-30 | 唐泽制动器(天津)有限公司 | Electric bicycle charger for parameter adjustment by using self-contained interface |
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- 2022-05-13 CN CN202221161406.4U patent/CN217427733U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116191631A (en) * | 2023-01-31 | 2023-05-30 | 深圳市凌鑫电子有限公司 | Low-cost power supply charging circuit |
| CN116191631B (en) * | 2023-01-31 | 2023-09-29 | 深圳市凌鑫电子有限公司 | Low-cost power supply charging circuit |
| CN118412967A (en) * | 2024-06-25 | 2024-07-30 | 唐泽制动器(天津)有限公司 | Electric bicycle charger for parameter adjustment by using self-contained interface |
| CN118412967B (en) * | 2024-06-25 | 2024-09-27 | 唐泽制动器(天津)有限公司 | Electric bicycle charger for parameter adjustment by using self-contained interface |
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