CN219875156U - Charging circuit based on PWM control - Google Patents
Charging circuit based on PWM control Download PDFInfo
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- CN219875156U CN219875156U CN202321100887.2U CN202321100887U CN219875156U CN 219875156 U CN219875156 U CN 219875156U CN 202321100887 U CN202321100887 U CN 202321100887U CN 219875156 U CN219875156 U CN 219875156U
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- 238000012544 monitoring process Methods 0.000 claims abstract description 60
- 230000003321 amplification Effects 0.000 claims abstract description 22
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 22
- 239000003990 capacitor Substances 0.000 claims description 88
- 238000001514 detection method Methods 0.000 claims description 26
- 230000001105 regulatory effect Effects 0.000 claims description 15
- 230000000087 stabilizing effect Effects 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 12
- 230000006870 function Effects 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000001131 transforming effect Effects 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 230000003446 memory effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Abstract
The utility model discloses a charging circuit based on PWM control, which comprises: the intelligent battery charging system comprises an input module, an intelligent chip control module, a plurality of groups of battery charging modules and electric quantity display modules which are respectively in one-to-one correspondence with the groups of battery charging modules; the input module is respectively connected with the intelligent chip of the intelligent chip module and each group of battery charging modules; the battery charging module comprises a PWM driving amplifying module, a MOS tube circuit module and a circuit monitoring module; one end of the PWM driving amplification module is connected with the intelligent chip control module, and the other end of the PWM driving amplification module is connected with the first connecting end of the MOS tube circuit module; the second connecting end of the MOS tube circuit module is connected with the circuit monitoring module; the circuit monitoring module is connected with the intelligent chip control module. Based on the connection mode, the utility model can monitor the charging states of a plurality of groups of batteries in real time, intelligently control the charging voltages of the plurality of groups of batteries, prevent the batteries from being damaged and shorten the charging time of the batteries.
Description
Technical Field
The utility model relates to the technical field of charging voltage adjustment output, in particular to a charging circuit based on PWM control.
Background
The lithium ion battery is a new generation green rechargeable battery, has the outstanding advantages of high voltage, small volume, good cycle performance, no memory effect and the like, but has more severe requirements on charging conditions, and the battery can be damaged due to too high and too low voltage, so that the service life of the battery is reduced.
Most of the existing battery charging seats are of an AA alkaline battery structure, and a plurality of batteries cannot be recharged; most of charging modes are constant-current and constant-voltage modes for charging the battery successively, the charging speed is low, and overcharge or undercharge phenomena are easy to occur, so that the service life of the battery is shortened.
Therefore, the existing battery charging stand has the problems of single charging quantity and low charging speed.
Disclosure of Invention
The utility model provides a charging circuit based on PWM control, which aims to solve the problems of single charging quantity and low charging speed of the existing battery charging seat.
In order to solve the above technical problem, an aspect of the present utility model provides a charging circuit based on PWM control, which includes: the intelligent battery charging system comprises an input module, an intelligent chip control module, a plurality of groups of battery charging modules and electric quantity display modules which are respectively in one-to-one correspondence with the groups of battery charging modules; the input module is connected with each group of battery charging modules; the battery charging module comprises a PWM driving amplifying module, a MOS tube circuit module and a circuit monitoring module; one end of the PWM driving amplification module is connected with the intelligent chip control module, and the other end of the PWM driving amplification module is connected with the first connecting end of the MOS tube circuit module; the second connecting end of the MOS tube circuit module is connected with the circuit monitoring module; the circuit monitoring module is connected with the intelligent chip in the intelligent chip control module.
Further, the PWM driving amplification module comprises a first resistor and a triode;
one end of the first resistor is connected with the intelligent chip control module, and the other end of the first resistor is connected with the base electrode of the triode;
and the collector electrode of the triode is connected with the MOS tube circuit module, and the emitter electrode of the triode is grounded.
Further, the MOS tube circuit module comprises a second resistor, an MOS tube, a first diode, a coil and a first capacitor;
the grid electrode of the MOS tube is connected with the collector electrode of the triode and is used as a first connecting end of the MOS tube circuit module to be connected with one end of the second resistor, and the other end of the second resistor is connected with the source electrode of the MOS tube; the drain electrode of the MOS tube is connected with the cathode of the first diode and the head end of the coil at the same time, and the anode of the first diode is grounded;
the tail end of the coil is connected with one end of the first capacitor and is used as a second connecting end of the MOS tube circuit module to be connected with the circuit monitoring module, and the other end of the first capacitor is grounded.
Further, the circuit monitoring module comprises a voltage monitoring module, a battery and a current monitoring module;
the positive electrode of the battery is connected with the positive electrode connecting end of the voltage monitoring module, and the negative electrode of the battery is connected with the negative electrode connecting end of the current monitoring module.
Further, the voltage monitoring module comprises a third resistor, a fourth resistor and a second capacitor;
one end of the third resistor is used as the positive electrode connecting end and is connected with the second connecting end of the MOS tube circuit module and the positive electrode of the battery; the other end of the third resistor is connected with one end of the second capacitor and one end of the fourth resistor at the same time; the connection point of the second capacitor, the third resistor and the fourth resistor is used as a voltage detection end of the voltage monitoring module and is connected with an eighteenth pin of the intelligent chip;
the other end of the second capacitor is connected with the other end of the fourth resistor and grounded.
Further, the current monitoring module comprises a fifth resistor, a sixth resistor and a third capacitor;
one end of the fifth resistor is used as the negative electrode connecting end and is connected with the negative electrode of the battery and one end of the sixth resistor;
the other end of the sixth resistor is connected with one end of the third capacitor, and the other end of the third capacitor is grounded;
and the connecting end of the sixth resistor and the third capacitor is used as a current detection end of the current monitoring module and is connected with a nineteenth pin of the intelligent chip.
Further, the charging circuit further comprises a voltage detection module and a voltage regulation module;
the input module is connected with the voltage detection module, the voltage regulation module and the battery charging modules.
Further, the voltage regulating module comprises a voltage stabilizing chip, a fourth capacitor and a fifth capacitor;
the voltage stabilizing chip comprises a first pin, a second pin and a third pin;
the first pin is connected with one end of the fourth capacitor and one end of the fifth capacitor at the same time and grounded;
the second pin is connected with the intelligent chip control module and the other end of the fifth capacitor at the same time; the connection point of the second pin, the intelligent chip control module and the fifth capacitor is used as a voltage output end of the voltage regulating module;
and the third pin is connected with the voltage detection module and the other end of the fourth capacitor at the same time.
Further, the intelligent chip control module comprises a writer and a sixth capacitor;
one end of the sixth capacitor is connected with the VSS pin of the intelligent chip and grounded, and the other end of the sixth capacitor is connected with the VDD pin of the intelligent chip and the voltage output end at the same time;
the burner comprises a first burning pin, a second burning pin and a third burning pin, wherein the first burning pin is connected with the voltage output end, the second burning pin is grounded, and the third burning pin is connected with a fourth pipe pin of the intelligent chip.
Further, the electric quantity display module is formed by connecting a plurality of light emitting diodes in parallel;
the positive electrode of each light emitting diode is connected with the voltage regulating module, and the negative electrode of each light emitting diode is connected with a corresponding pin on the intelligent chip.
The utility model discloses a charging circuit based on PWM control, which comprises: the intelligent battery charging system comprises an input module, an intelligent chip control module, a plurality of groups of battery charging modules and electric quantity display modules which are respectively in one-to-one correspondence with the groups of battery charging modules; the input module is connected with each group of battery charging modules; the battery charging module comprises a PWM driving amplifying module, a MOS tube circuit module and a circuit monitoring module; one end of the PWM driving amplification module is connected with the intelligent chip control module, and the other end of the PWM driving amplification module is connected with the first connecting end of the MOS tube circuit module; the second connecting end of the MOS tube circuit module is connected with the circuit monitoring module; the circuit monitoring module is connected with the intelligent chip in the intelligent chip control module. Based on the connection mode, the utility model can monitor the charging states of a plurality of groups of batteries in real time, intelligently control the charging voltages of the plurality of groups of batteries, prevent the batteries from being damaged, shorten the charging time of the batteries and greatly improve the charging efficiency of the rechargeable batteries.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a charging circuit according to an embodiment of the present utility model;
FIG. 2 is a schematic circuit diagram of an input module in a charging circuit according to an embodiment of the present utility model;
FIG. 3 is a schematic circuit diagram of a smart chip control module in a charging circuit according to an embodiment of the present utility model;
fig. 4 is a schematic circuit diagram of a battery charging module in a charging circuit according to an embodiment of the present utility model;
FIG. 5 is a schematic circuit diagram of an electric quantity display module in a charging circuit according to an embodiment of the present utility model;
FIG. 6 is a schematic circuit diagram of a voltage detection module in a charging circuit according to an embodiment of the present utility model;
fig. 7 is a schematic circuit diagram of a voltage regulation module in a charging circuit according to an embodiment of the utility model.
Wherein, each reference sign is as follows in the figure:
10. a charging circuit; 11. an input module; 12. an intelligent chip control module; 13. a battery charging module; 14. an electric quantity display module; u2, an intelligent chip; BT1, battery; r1, a first resistor; q3, triode; r3, a second resistor; q1, MOS tube; l1, a coil; c1, a first capacitor; r5, a third resistor; r8, a fourth resistor; c3, a second capacitor; r24, fifth resistance; r11, sixth resistance; c4, a third capacitor; 15. a voltage detection module; 16. a voltage regulation module; u1, a voltage stabilizing chip; c10, a fourth capacitor; c11, a fifth capacitor; j1, a burner; c9, sixth capacitance.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be understood that the terms "comprises" and "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in the present specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.
Referring to fig. 1 to 5, fig. 1 is a schematic structural diagram of a charging circuit according to an embodiment of the utility model; FIG. 2 is a schematic circuit diagram of an input module in a charging circuit according to an embodiment of the present utility model;
FIG. 3 is a schematic circuit diagram of a smart chip control module in a charging circuit according to an embodiment of the present utility model; fig. 4 is a schematic circuit diagram of a battery charging module in a charging circuit according to an embodiment of the present utility model;
fig. 5 is a schematic circuit diagram of an electric quantity display module in a charging circuit according to an embodiment of the utility model. The present utility model proposes a charging circuit 10 based on PWM control, comprising: the intelligent battery charging system comprises an input module 11, an intelligent chip control module 12, a plurality of groups of battery charging modules 13 and electric quantity display modules 14 which are respectively in one-to-one correspondence with the groups of battery charging modules 13; the input module 11 is connected with each group of battery charging modules 13; the battery charging module 13 comprises a PWM driving amplifying module, a MOS tube circuit module and a circuit monitoring module; one end of the PWM driving amplification module is connected with the intelligent chip control module 12, and the other end of the PWM driving amplification module is connected with the first connecting end of the MOS tube circuit module; the second connecting end of the MOS tube circuit module is connected with the circuit monitoring module; the circuit monitoring module is connected with the intelligent chip U2 in the intelligent chip control module 12.
In this embodiment, the charging circuit 10 includes a first battery charging module a and a second battery charging module B, and the circuit structure of the second battery charging module B is the same as that of the first battery charging module a (specifically, as shown in fig. 1). The input module 11 is connected to each group of the battery charging modules 13, and the input module 11 is configured to receive an input voltage and supply power to the battery BT 1. One end of the PWM driving amplification module is connected with the intelligent chip control module 12, and the other end of the PWM driving amplification module is connected with the first connecting end of the MOS tube circuit module; the second connecting end of the MOS tube circuit module is connected with the circuit monitoring module; the circuit monitoring module is connected with the intelligent chip U2 in the intelligent chip control module 12. The intelligent chip control module 12 may monitor the charging state of the battery BT1 in real time, and send a voltage adjustment signal to the PWM driving amplification module according to the charging state of the battery BT1, where the PWM driving amplification module controls on and off of the MOS transistor circuit module according to the voltage adjustment signal, so as to adjust the input voltage to be a voltage suitable for the battery BT 1.
The battery BT1 may be a lithium battery, the highest limit voltage of charging the battery BT1 is 4.2V, and when the no-load voltage of the battery BT1 is 4.2V, the battery BT1 is in a full-charge state, and at this time, charging of the battery BT1 may be stopped. When the electric quantity of the battery BT1 is low, 0.5C current is provided for the battery BT1, so that quick charging is realized. When the electric quantity of the battery BT1 is close to 4.2V, the battery BT1 is powered by a small current. In the charging process of the battery BT1, the load of the battery BT1 is always maintained in a certain range by controlling the on-off state of the MOS tube circuit module, so that the damage of the battery BT1 can be effectively prevented, the charging time of the battery BT1 is shortened, and the charging efficiency of the rechargeable battery is greatly improved.
In one embodiment, as shown in fig. 1 to 4, the PWM driving amplification module includes a first resistor R1 and a transistor Q3; one end of the first resistor R1 is connected with the intelligent chip control module 12, and the other end of the first resistor R1 is connected with the base electrode of the triode Q3; the collector of the triode Q3 is connected with the MOS tube circuit module, and the emitter of the triode Q3 is grounded.
In this embodiment, the first resistor R1 is used to prevent the device from being damaged due to the excessive current in the circuit, and the resistance value of the first resistor R1 is 3K. The circuit monitoring module is connected with an intelligent chip U2 in the intelligent chip control module 12, the intelligent chip control module 12 can monitor the charging state of a battery BT1 in real time, and send a voltage regulating signal to the PWM driving amplifying module according to the charging state of the battery BT1, a collector of a triode Q3 is connected with the MOS tube circuit module, and the triode Q3 is used for amplifying the voltage regulating signal so as to drive the MOS tube circuit module.
In an embodiment, as shown in fig. 1 to 4, the MOS transistor circuit module includes a second resistor R3, a MOS transistor Q1, a first diode, a coil L1, and a first capacitor C1; the grid electrode of the MOS tube Q1 is connected with the collector electrode of the triode Q3 and is used as a first connecting end of the MOS tube circuit module to be connected with one end of the second resistor R3, and the other end of the second resistor R3 is connected with the source electrode of the MOS tube Q1; the drain electrode of the MOS tube Q1 is connected with the cathode of the first diode and the head end of the coil L1 at the same time, and the anode of the first diode is grounded; the tail end of the coil L1 is connected with one end of the first capacitor C1 and is used as a second connecting end of the MOS tube circuit module to be connected with the circuit monitoring module, and the other end of the first capacitor C1 is grounded.
In this embodiment, the MOS transistor Q1 is a P-channel MOS transistor, and the MOS transistor Q1 is in a state of repeated charging and discharging, so that a huge drain current is easily generated, which causes the MOS transistor Q1 to burn out, and at this time, the second resistor R3 plays a role of a bleeder resistor, so that damage to the MOS transistor Q1 can be prevented. The current in the circuit flows from the source electrode of the MOS tube Q1 to the drain electrode of the MOS tube Q1, and the first diode can prevent the reverse connection of the source electrode and the drain electrode. The coil L1 and the first capacitor C1 are used for storing a current in a circuit. When the MOS transistor Q1 is conducted, the voltage and the current in the circuit form a loop to charge the coil L1, the first capacitor C1 and the battery BT 1. When the MOS transistor Q1 is turned off, the coil L1 and the first capacitor C1 supply power to the battery BT 1. The PWM driving amplification module can drive the MOS tube circuit module, and the input voltage is regulated to be the voltage suitable for the battery BT1 by controlling the on and off of the MOS tube Q1.
In one embodiment, as shown in fig. 1 to 4, the circuit monitoring module includes a voltage monitoring module, a battery BT1, and a current monitoring module; the positive electrode of the battery BT1 is connected with the positive electrode connecting end of the voltage monitoring module, and the negative electrode of the battery BT1 is connected with the negative electrode connecting end of the current monitoring module.
In this embodiment, the circuit monitoring module is connected to the intelligent chip U2 in the intelligent chip control module 12, the circuit monitoring module includes a voltage monitoring module and a current monitoring module, the intelligent chip U2 may monitor the charging state of the battery BT1 in real time through the voltage monitoring module and the current monitoring module, and send a voltage regulation signal to the PWM driving amplifying module according to the charging state of the battery BT1, and the PWM driving amplifying module controls on and off of the MOS transistor circuit module according to the voltage regulation signal, so as to regulate the input voltage to be a voltage applicable to the battery BT 1.
The utility model also provides charging equipment, which is provided with a plurality of battery grooves, wherein the battery body is arranged in the battery grooves, so that the situation that the battery is damaged due to reverse connection of the battery body can be effectively prevented.
In an embodiment, as shown in fig. 1 to 4, the voltage monitoring module includes a third resistor R5, a fourth resistor R8, and a second capacitor C3; one end of the third resistor R5 is used as the positive electrode connecting end and is connected with the second connecting end of the MOS tube circuit module and the positive electrode of the battery BT 1; the other end of the third resistor R5 is simultaneously connected with one end of the second capacitor C3 and one end of the fourth resistor R8; the connection point of the second capacitor C3, the third resistor R5 and the fourth resistor R8 is used as a voltage detection end of the voltage monitoring module and is connected with an eighteenth pin of the intelligent chip U2; the other end of the second capacitor C3 is connected to the other end of the fourth resistor R8 and grounded.
In this embodiment, the resistance of the third resistor R5 is 300K, the resistance of the fourth resistor R8 is 100K, and one end of the third resistor R5 is connected to the second connection end of the MOS transistor circuit module and the positive electrode of the battery BT 1; the other end of the third resistor R5 is simultaneously connected with one end of the second capacitor C3 and one end of the fourth resistor R8; the connection point of the second capacitor C3, the third resistor R5 and the fourth resistor R8 is used as a voltage detection end of the voltage monitoring module and is connected with an eighteenth pin of the intelligent chip U2; the intelligent chip U2 can intelligently detect the voltage of the battery BT1 through the voltage detection terminal. The other end of the second capacitor C3 is grounded and used for preventing the circuit from being short-circuited and guaranteeing the normal operation of the circuit.
In an embodiment, as shown in fig. 1 to 4, the current monitoring module includes a fifth resistor R24, a sixth resistor R11, and a third capacitor C4; one end of the fifth resistor R24 is connected to the negative electrode of the battery BT1 and one end of the sixth resistor R11 as the negative electrode connection terminal; the other end of the sixth resistor R11 is connected with one end of the third capacitor C4, and the other end of the third capacitor C4 is grounded; and the connection end of the sixth resistor R11 and the third capacitor C4 is used as a current detection end of the current monitoring module and is connected with a nineteenth pin of the intelligent chip U2.
In this embodiment, the resistance of the fifth resistor R24 is about 0.05Ω, and the resistance of the sixth resistor R11 is 1K. One end of the fifth resistor R24 is connected to the negative electrode of the battery BT1 and one end of the sixth resistor R11; the other end of the sixth resistor R11 is connected with one end of the third capacitor C4, the connection end of the sixth resistor R11 and the third capacitor C4 is used as a current detection end of a current monitoring module to be connected with a nineteenth pin of the intelligent chip U2, the intelligent chip U2 can detect the current of the battery BT1 in real time through the current detection end, the voltage of the battery BT1 is detected in real time through the voltage detection end, the intelligent chip U2 can analyze the detected information to generate a voltage regulation signal and send the voltage regulation signal to the PWM driving amplification module, and the PWM driving amplification module controls the on and off of the MOS tube circuit module according to the voltage regulation signal so as to regulate the input voltage into the applicable voltage of the battery BT 1.
The other end of the third capacitor C4 is grounded, so that the short circuit of the circuit can be prevented, and the normal operation of the circuit is ensured.
In one embodiment, as shown in fig. 1 to 7, the charging circuit 10 includes a voltage detection module 15 and a voltage adjustment module 16; the input module 11 is connected with the voltage detection module 15, the voltage adjustment module 16 and the battery charging modules 13.
In this embodiment, the voltage detection module 15 is configured to monitor an input voltage, and has overvoltage, undervoltage, and phase-failure protection functions, where the voltage detection module 15 is connected to a fifteenth pin of the intelligent chip U2, and the voltage detection module 15 may send monitoring information to the intelligent chip U2, so as to prevent a short circuit of a line and ensure normal operation of the line. The voltage regulating module 16 is used for providing stable voltage, so that the voltage is always maintained within a certain range, and damage to devices caused by too high or too low voltage is prevented.
In one embodiment, as shown in fig. 3 and 7, the voltage regulation module 16 includes a voltage regulation chip U1, a fourth capacitor C10, and a fifth capacitor C11; the voltage stabilizing chip U1 comprises a first pin, a second pin and a third pin; the first pin is connected with one end of the fourth capacitor C10 and one end of the fifth capacitor C11 at the same time and grounded; the second pin is connected with the intelligent chip control module 12 and the other end of the fifth capacitor C11 at the same time; the connection point of the second pin, the intelligent chip control module 12 and the fifth capacitor C11 is used as a voltage output end of the voltage regulating module 16; the third pin is connected to the voltage detection module 15 and the other end of the fourth capacitor C10 at the same time.
In this embodiment, the voltage stabilizing chip U1 is 7533, SQT-23, the voltage adjusting module 16 has functions of adjusting and transforming, and the voltage output end of the voltage adjusting module 16 can output a 3.3V stabilized voltage, so as to prevent the device from being damaged due to too high or too low voltage. The voltage stabilizing chip U1 comprises a first pin, a second pin and a third pin; the first pin is connected with one end of the fourth capacitor C10 and one end of the fifth capacitor C11 and grounded, so as to prevent the circuit from being shorted, and ensure the normal operation of the circuit. The second pin is connected with the intelligent chip control module 12 and the other end of the fifth capacitor C11 at the same time; the connection point of the second pin, the intelligent chip control module 12 and the fifth capacitor C11 is used as a voltage output end of the voltage regulating module 16; the third pin is connected with the voltage detection module 15 and the other end of the fourth capacitor C10, and both the fourth capacitor C10 and the fifth capacitor C11 have filtering effects, so that the stability of voltage output can be improved.
In one embodiment, as shown in fig. 3, the smart chip control module 12 includes a writer J1 and a sixth capacitor C9; one end of the sixth capacitor C9 is connected with the VSS pin of the intelligent chip U2 and grounded, and the other end of the sixth capacitor C9 is simultaneously connected with the VDD pin of the intelligent chip U2 and the voltage output end; the burner J1 comprises a first burning pin, a second burning pin and a third burning pin, wherein the first burning pin is connected with the voltage output end, the second burning pin is grounded, and the third burning pin is connected with a fourth pipe pin of the intelligent chip U2.
In this embodiment, the sixth capacitor C9 is 1 μf, one end of the sixth capacitor C9 is connected to the VSS pin of the smart chip U2 and grounded, the other end of the sixth capacitor C9 is simultaneously connected to the VDD pin of the smart chip U2 and the voltage output terminal, and the sixth capacitor C9 plays a role in filtering, so that the anti-interference capability of the smart chip U2 can be improved. The burner J1 comprises a first burning pin, a second burning pin and a third burning pin, wherein the first burning pin is connected with the voltage output end and is used for supplying power to the burner J1. The second burning pin is grounded, so that equipment and circuits can be prevented from being damaged. The third programming pin is connected with a fourth pin of the intelligent chip U2, so that programming of the intelligent chip U2 is realized.
In one embodiment, as shown in fig. 1, 3 and 4, the power display module 14 is composed of a plurality of light emitting diodes connected in parallel; the positive electrode of each light emitting diode is connected with the voltage regulating module 16, and the negative electrode of each light emitting diode is connected with a corresponding pin on the intelligent chip U2.
In this embodiment, the power display module 14 is composed of 5 leds connected in parallel; the positive electrode of each light emitting diode is connected with the voltage regulating module 16, and the voltage regulating module 16 has the functions of regulating and transforming voltage, so that the damage of devices caused by overhigh or overlow voltage is prevented. The negative pole of each light emitting diode is connected with a pin on the intelligent chip U2, the intelligent chip U2 can monitor the charging state of the battery BT1 in real time, and can analyze the charging state of the battery BT1 to obtain the current electric quantity of the battery BT1, the intelligent chip U2 can send the current electric quantity of the battery BT1 to the electric quantity display module 14 in a signal form, and the electric quantity display module 14 can display the current electric quantity of the battery BT1 through the light emitting diodes.
The utility model discloses a charging circuit based on PWM control, which comprises: the intelligent battery charging system comprises an input module, an intelligent chip control module, a plurality of groups of battery charging modules and electric quantity display modules which are respectively in one-to-one correspondence with the groups of battery charging modules; the input module is connected with each group of battery charging modules; the battery charging module comprises a PWM driving amplifying module, a MOS tube circuit module and a circuit monitoring module; one end of the PWM driving amplification module is connected with the intelligent chip control module, and the other end of the PWM driving amplification module is connected with the first connecting end of the MOS tube circuit module; the second connecting end of the MOS tube circuit module is connected with the circuit monitoring module; the circuit monitoring module is connected with the intelligent chip in the intelligent chip control module. Based on the connection mode, the utility model can monitor the charging states of a plurality of groups of batteries in real time, intelligently control the charging voltages of the plurality of groups of batteries, prevent the batteries from being damaged, shorten the charging time of the batteries and greatly improve the charging efficiency of the rechargeable batteries.
While the utility model has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions of equivalents may be made and equivalents will be apparent to those skilled in the art without departing from the scope of the utility model. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.
Claims (10)
1. A charging circuit based on PWM control, comprising: the intelligent battery charging system comprises an input module, an intelligent chip control module, a plurality of groups of battery charging modules and electric quantity display modules which are respectively in one-to-one correspondence with the groups of battery charging modules;
the input module is connected with each group of battery charging modules;
the battery charging module comprises a PWM driving amplifying module, a MOS tube circuit module and a circuit monitoring module; one end of the PWM driving amplification module is connected with the intelligent chip control module, and the other end of the PWM driving amplification module is connected with the first connecting end of the MOS tube circuit module;
the second connecting end of the MOS tube circuit module is connected with the circuit monitoring module;
the circuit monitoring module is connected with the intelligent chip in the intelligent chip control module.
2. The PWM control-based charging circuit of claim 1, wherein the PWM drive amplification module comprises a first resistor and a transistor;
one end of the first resistor is connected with the intelligent chip control module, and the other end of the first resistor is connected with the base electrode of the triode;
and the collector electrode of the triode is connected with the MOS tube circuit module, and the emitter electrode of the triode is grounded.
3. The PWM control-based charging circuit of claim 2, wherein the MOS transistor circuit module comprises a second resistor, a MOS transistor, a first diode, a coil, and a first capacitor;
the grid electrode of the MOS tube is connected with the collector electrode of the triode and is used as a first connecting end of the MOS tube circuit module to be connected with one end of the second resistor, and the other end of the second resistor is connected with the source electrode of the MOS tube; the drain electrode of the MOS tube is connected with the cathode of the first diode and the head end of the coil at the same time, and the anode of the first diode is grounded;
the tail end of the coil is connected with one end of the first capacitor and is used as a second connecting end of the MOS tube circuit module to be connected with the circuit monitoring module, and the other end of the first capacitor is grounded.
4. A PWM control-based charging circuit according to claim 3, wherein the circuit monitoring module includes a voltage monitoring module, a battery, and a current monitoring module;
the positive electrode of the battery is connected with the positive electrode connecting end of the voltage monitoring module, and the negative electrode of the battery is connected with the negative electrode connecting end of the current monitoring module.
5. The PWM control-based charging circuit of claim 4, wherein the voltage monitoring module comprises a third resistor, a fourth resistor, and a second capacitor;
one end of the third resistor is used as the positive electrode connecting end and is connected with the second connecting end of the MOS tube circuit module and the positive electrode of the battery; the other end of the third resistor is connected with one end of the second capacitor and one end of the fourth resistor at the same time; the connection point of the second capacitor, the third resistor and the fourth resistor is used as a voltage detection end of the voltage monitoring module and is connected with an eighteenth pin of the intelligent chip;
the other end of the second capacitor is connected with the other end of the fourth resistor and grounded.
6. The PWM control-based charging circuit of claim 4, wherein the current monitoring module comprises a fifth resistor, a sixth resistor, and a third capacitor;
one end of the fifth resistor is used as the negative electrode connecting end and is connected with the negative electrode of the battery and one end of the sixth resistor;
the other end of the sixth resistor is connected with one end of the third capacitor, and the other end of the third capacitor is grounded;
and the connecting end of the sixth resistor and the third capacitor is used as a current detection end of the current monitoring module and is connected with a nineteenth pin of the intelligent chip.
7. The PWM control-based charging circuit of claim 1, further comprising a voltage detection module and a voltage regulation module;
the input module is connected with the voltage detection module, the voltage regulation module and the battery charging modules.
8. The PWM control-based charging circuit of claim 7, wherein the voltage regulation module comprises a voltage regulation chip, a fourth capacitor, and a fifth capacitor;
the voltage stabilizing chip comprises a first pin, a second pin and a third pin;
the first pin is connected with one end of the fourth capacitor and one end of the fifth capacitor at the same time and grounded;
the second pin is connected with the intelligent chip control module and the other end of the fifth capacitor at the same time; the connection point of the second pin, the intelligent chip control module and the fifth capacitor is used as a voltage output end of the voltage regulating module;
and the third pin is connected with the voltage detection module and the other end of the fourth capacitor at the same time.
9. The PWM control-based charging circuit of claim 8, wherein the smart chip control module comprises a burner and a sixth capacitor;
one end of the sixth capacitor is connected with the VSS pin of the intelligent chip and grounded, and the other end of the sixth capacitor is connected with the VDD pin of the intelligent chip and the voltage output end at the same time;
the burner comprises a first burning pin, a second burning pin and a third burning pin, wherein the first burning pin is connected with the voltage output end, the second burning pin is grounded, and the third burning pin is connected with a fourth pipe pin of the intelligent chip.
10. The PWM control-based charging circuit of claim 9, wherein the power display module is composed of a plurality of light emitting diodes connected in parallel;
the positive electrode of each light emitting diode is connected with the voltage regulating module, and the negative electrode of each light emitting diode is connected with a corresponding pin on the intelligent chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321100887.2U CN219875156U (en) | 2023-05-09 | 2023-05-09 | Charging circuit based on PWM control |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321100887.2U CN219875156U (en) | 2023-05-09 | 2023-05-09 | Charging circuit based on PWM control |
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| Publication Number | Publication Date |
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| CN219875156U true CN219875156U (en) | 2023-10-20 |
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|---|---|---|---|
| CN202321100887.2U Active CN219875156U (en) | 2023-05-09 | 2023-05-09 | Charging circuit based on PWM control |
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| CN (1) | CN219875156U (en) |
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2023
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