Control circuit suitable for power supply and capable of freely switching voltage

Abstract

The invention discloses a control circuit suitable for a power supply and capable of freely switching voltage. A control circuit comprises a first control circuit used for freely switching power supply voltage, and a second control circuit and a third control circuit which are electrically connected with the first control circuit; the power supply voltage can be switched to output different voltages, and the conversion and protection functions of the battery voltage can be realized. In other words, by means of the scheme, the requirements of different devices for voltage can be met. Through accurate battery management, it is ensured that the battery works under safe and efficient conditions, and the service life of the battery is prolonged. In the aspect of user friendliness, a simple and easy-to-use voltage switching mechanism can be provided, so that a user can easily select required voltage output as required. A rechargeable lithium battery is adopted to replace a traditional dry battery, so that the pollution of a waste battery to the environment is reduced, and meanwhile, energy conservation and reutilization are realized.

Description

Technical Field

[0001] The present invention belongs to the technical field of power supply voltage output control circuits, and in particular relates to a control circuit suitable for power supply and capable of freely switching voltage. Background Art

[0002] At present, when the battery is in use, it is impossible to switch the power supply voltage to output different voltages, and it is impossible to achieve the conversion and protection functions of the battery voltage. That is, in the existing batteries, dual voltage output cannot be achieved.

[0003] In addition, how to efficiently realize voltage conversion between dual voltages to reduce energy loss and improve battery efficiency. How to accurately monitor the battery charging and discharging status and implement overcharge / over-discharge protection to extend the battery life and safety. How to implement a user-friendly voltage switching mechanism so that users can easily select the required voltage output according to their needs are all drawbacks of existing batteries.

[0004] Therefore, in view of the technical problems and defects of the above-mentioned inability to realize the power supply voltage switching to output different voltages, and the inability to realize the battery voltage conversion and protection functions, as well as the above-mentioned disadvantages of existing batteries, it is urgent to design and develop a control circuit suitable for the power supply and with free voltage switching. Summary of the invention

[0005] In order to overcome the above-mentioned deficiencies and difficulties in the prior art, the purpose of the present invention is to provide a control circuit suitable for a power supply and with freely switchable voltage, so as to realize the power supply voltage can be switched to output different voltages, and realize the conversion and protection functions of the battery voltage.

[0006] The object of the present invention is to provide a control circuit suitable for a power supply and capable of freely switching voltage.

[0007] The object of the present invention is achieved as follows: the control circuit includes a first control circuit for freely switching the power supply voltage, and a second control circuit and a third control circuit electrically connected to the first control circuit; wherein the second control circuit is a charging circuit; and the third control circuit is a protection circuit;

[0008] The first control circuit is provided with a toggle switch for controlling the real-time switching of the power supply voltage output; the third pin of the toggle switch is respectively connected to one end of the ninth resistor, one end of the first transistor, and the second control circuit, the other end of the ninth resistor is respectively connected to the output end and the other end of the first transistor; the third end of the first transistor is respectively connected to the output end and the third end of the second transistor;

[0009] The first pin of the toggle switch is respectively connected to one end of the tenth resistor and one end of the second transistor, and the other end of the tenth resistor is respectively connected to the input end and the other end of the second transistor.

[0010] Furthermore, the first transistor and the second transistor are both of type XGC15P16AL.

[0011] Furthermore, the second control circuit is provided with a first control chip;

[0012] The first pin of the first control chip is connected to one end of the fifth resistor; the other end of the fifth resistor is grounded; the second pin of the first control chip is connected to the cathode of the first light-emitting diode; the anode of the first light-emitting diode is connected to the input end;

[0013] The third pin of the first control chip is connected to one end of the sixth resistor; the other end of the sixth resistor and the fourth pin of the first control chip are grounded together;

[0014] The sixth pin of the first control chip is connected to one end of the first inductor; the other end of the first inductor is respectively connected to the output end, one end of the second capacitor, and the eighth pin of the first control chip; the other end of the second capacitor is grounded;

[0015] The seventh pin of the first control chip is connected to the input end and one end of the first capacitor respectively; the other end of the second capacitor is grounded.

[0016] Furthermore, the model of the first control chip is XGC3F01.

[0017] Furthermore, a fourth control chip is provided in the third control circuit;

[0018] The first pin of the fourth control chip is respectively connected to the second pin of the fourth control chip and one end of the sixth capacitor; the other end of the sixth capacitor is respectively connected to the third pin of the fourth control chip and one end of the fourteenth resistor;

[0019] The fourth pin of the fourth control chip is connected to one end of the twelfth resistor; the other end of the twelfth resistor, the fifth pin of the fourth control chip and the sixth pin of the fourth control chip are grounded in common.

[0020] Furthermore, the model of the fourth control chip is XGC3F08B.

[0021] Furthermore, the control circuit is also provided with an interface unit;

[0022] The third pin of the interface unit is connected to one end of the first resistor; the fourth pin of the interface unit is connected to one end of the third resistor; the other end of the first resistor, the other end of the third resistor, the first pin of the interface unit and the sixth pin of the interface unit are grounded together.

[0023] Furthermore, the model of the interface unit is TYPEC6P-LT1.

[0024] The present invention provides a control circuit suitable for a power supply and with freely switchable voltage, wherein the control circuit includes a first control circuit for freely switching the power supply voltage, and a second control circuit and a third control circuit electrically connected to the first control circuit; wherein the second control circuit is a charging circuit; the third control circuit is a protection circuit; a toggle switch for controlling the real-time switching of the power supply voltage output is provided in the first control circuit; the third pin of the toggle switch is respectively connected to one end of a ninth resistor, one end of a first transistor, and the second control circuit, and the other end of the ninth resistor is respectively connected to the output end and the other end of the first transistor; the third end of the first transistor is respectively connected to the output end and the third end of the second transistor; the first pin of the toggle switch is respectively connected to one end of a tenth resistor and one end of a second transistor, and the other end of the tenth resistor is respectively connected to the input end and the other end of the second transistor, so that the power supply voltage can be switched to output different voltages, and the conversion and protection functions of the battery voltage can be realized.

[0025] That is to say, through the scheme of the present invention, fast and efficient voltage conversion between power supply voltages can be achieved to meet the voltage requirements of different devices. In terms of battery management optimization: through precise battery management, the battery is ensured to work under safe and efficient conditions, and the battery life is extended. In terms of user-friendliness: a simple and easy-to-use voltage switching mechanism can be provided, allowing users to easily select the required voltage output according to their needs. At the same time, in terms of environmental protection and energy saving: by using rechargeable lithium batteries instead of traditional dry batteries, the pollution of waste batteries to the environment is reduced, and energy conservation and reuse are achieved at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 This is a schematic diagram of the principle framework of a control circuit applicable to a power supply and capable of freely switching voltage according to the present invention;

[0028] Figure 2 This is a schematic diagram of a first control circuit of an embodiment of a control circuit applicable to a power supply and capable of freely switching voltage according to the present invention;

[0029] Figure 3 It is a schematic diagram of a second control circuit of an embodiment of a control circuit applicable to a power supply and capable of freely switching voltage according to the present invention;

[0030] Figure 4 A third control circuit schematic diagram of an embodiment of a control circuit applicable to a power supply and capable of freely switching voltage according to the present invention;

[0031] Figure 5 This is a schematic diagram of an interface unit circuit of an embodiment of a control circuit applicable to a power supply and capable of freely switching voltage according to the present invention;

[0032] In the figure: R1-first resistor; R3-third resistor; R5-fifth resistor; R9-ninth resistor; R10-tenth resistor; R14-fourteenth resistor; R12-twelfth resistor; Q1-first transistor; Q2-second transistor; U1-first control chip; D1-first light emitting diode; R6-sixth resistor; L1-first inductor; C2-second capacitor; C1-first capacitor; U4-fourth control chip; C6-sixth capacitor. DETAILED DESCRIPTION

[0033] In order to better understand the purpose, technical solutions and advantages of the present invention, the present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0034] The present invention may also be implemented or applied through other different specific examples, and the details in this specification may also be modified and changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0035] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0036] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. Secondly, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0037] The present invention will be further described below in conjunction with the accompanying drawings. Figure 1-Figure 5 As shown, the present invention provides a control circuit applicable to a power supply and capable of freely switching voltage, the control circuit comprising a first control circuit for freely switching the power supply voltage, and a second control circuit and a third control circuit electrically connected to the first control circuit; wherein the second control circuit is a charging circuit; and the third control circuit is a protection circuit;

[0038] The first control circuit is provided with a toggle switch for controlling the real-time switching of the power supply voltage; the third pin of the toggle switch is respectively connected to one end of the ninth resistor, one end of the first transistor, and the second control circuit, the other end of the ninth resistor is respectively connected to the output end and the other end of the first transistor; the third end of the first transistor is respectively connected to the output end and the third end of the second transistor;

[0039] The first pin of the toggle switch is connected to one end of the tenth resistor and one end of the second transistor respectively, and the other end of the tenth resistor is connected to the input end and the other end of the second transistor respectively. Wherein, the models of the first transistor and the second transistor are both XGC15P16AL. That is to say, in a specific embodiment of the present invention, a toggle switch for controlling the real-time switching of the power supply voltage output (1.5V / 3.7V) is provided in the first control circuit; the third pin of the toggle switch is respectively connected to the ninth resistor and one end of the transistor (XGC15P16AL); the other end of the ninth resistor is connected to the sixth pin and the eighth pin of the chip (XGC3F01) and one end of the transistor (XGC15P16AL); the first control discharge end (P+) is respectively connected to the sixth pin and the eighth pin output end of the chip (XGC3F01) through one end of the transistor (XGC15P16AL); the first pin of the toggle switch is respectively connected to the tenth resistor and one end of the transistor (XGC15P16AL); the other end of the tenth resistor is connected to the B+ output end; the first control discharge end (P+) is respectively connected to the B+ output end through one end of the transistor (XGC15P16AL).

[0040] The second control circuit is provided with a first control chip; a first pin of the first control chip is connected to one end of a fifth resistor; the other end of the fifth resistor is grounded; a second pin of the first control chip is connected to a cathode of a first light-emitting diode; an anode of the first light-emitting diode is connected to an input end;

[0041] The third pin of the first control chip is connected to one end of the sixth resistor; the other end of the sixth resistor and the fourth pin of the first control chip are grounded together;

[0042] The sixth pin of the first control chip is connected to one end of the first inductor; the other end of the first inductor is respectively connected to the output end, one end of the second capacitor, and the eighth pin of the first control chip; the other end of the second capacitor is grounded;

[0043] The seventh pin of the first control chip is connected to the input terminal and one end of the first capacitor respectively; the other end of the second capacitor is grounded. The model of the first control chip is XGC3F01.

[0044] The third control circuit is provided with a fourth control chip; the first pin of the fourth control chip is respectively connected to the second pin of the fourth control chip and one end of the sixth capacitor; the other end of the sixth capacitor is respectively connected to the third pin of the fourth control chip and one end of the fourteenth resistor;

[0045] The fourth pin of the fourth control chip is connected to one end of the twelfth resistor; the other end of the twelfth resistor, the fifth pin of the fourth control chip and the sixth pin of the fourth control chip are grounded together. The model of the fourth control chip is XGC3F08B.

[0046] Preferably, the control circuit suitable for power supply and with freely switchable voltage further comprises an interface unit; the third pin of the interface unit is connected to one end of the first resistor; the fourth pin of the interface unit is connected to one end of the third resistor; the other end of the first resistor, the other end of the third resistor, the first pin of the interface unit and the sixth pin of the interface unit are grounded together. The model of the interface unit is TYPEC6P-LT1.

[0047] Specifically, in the embodiment of the scheme of the present invention, there is a toggle switch on the battery protection board with two gears. When the toggle switch is in the 1.5V gear, the positive and negative output voltages of the battery are 1.5V (simulating the dry battery voltage output at this time). When the toggle switch is in the 3.7V gear, the positive and negative output voltages of the battery are the standard 3.7V lithium battery voltage, which is completely consistent with the function of a single-cell lithium battery protection board.

[0048] Preferably, in the boost / buck circuit of the present invention: in order to achieve free switching between 1.5V and 3.7V, the circuit needs to include a boost circuit (to boost 1.5V to 3.7V) and a buck circuit (to reduce 3.7V to 1.5V). These circuits may be composed of inductors, capacitors, diodes, switches (such as MOSFETs), and control chips.

[0049] Corresponding battery management chip: used to monitor the charging and discharging status of the battery, and to realize the conversion and protection of the battery voltage. This type of chip may have functions such as battery voltage detection, charging current control, discharge current limitation, overcharge / over discharge protection, etc.

[0050] Dual voltage output design: The battery itself may adopt a dual voltage design, that is, it contains two voltage output terminals inside the battery, one is 1.5 V and the other is 3.7 V. Through an external circuit or switch, the user can select the desired voltage output.

[0051] In addition, the present invention adopts a hidden metal sheet design: In some battery designs, in order to achieve dual voltage output, a hidden metal sheet design may be adopted. This design allows the battery to use a 1.5V voltage output when discharging, and to charge through an internal 3.7V voltage when charging.

[0052] In principle, when a 1.5V voltage output is required, the battery management chip or external circuit will step down the 3.7V lithium battery voltage to 1.5V; when a 3.7V voltage output is required, it may be powered directly through the 3.7V voltage output terminal inside the battery, or the 1.5V voltage may be increased to 3.7V through a boost circuit (although this is less common because lithium batteries themselves can usually provide a voltage of 3.7V).

[0053] For example, in wireless mouse modification applications, some users modified the wireless mouse that originally used 1.5V dry batteries to use 3.7V lithium batteries, and used a step-down chip to achieve voltage conversion, thereby improving the mouse's battery life and stability. The modified mouse can maintain connection stability for a longer time and no longer disconnect frequently. Remote control upgrade: Similar to wireless mice, some remote controls can also be modified to achieve free switching between 1.5V and 3.7V voltages. This can not only improve the remote control distance and response speed of the remote control, but also significantly extend its use time and reduce the frequency of battery replacement.

[0054] In summary, the 1.5V and 3.7V free-switchable battery solution solves technical problems such as voltage conversion efficiency, battery management, and voltage switching mechanism by adopting technical means such as boost / buck circuits, battery management chips, and dual voltage output design, and achieves technical effects such as efficient voltage conversion, battery management optimization, user-friendliness, environmental protection, and energy saving.

[0055] That is to say, the present invention provides a control circuit suitable for a power supply and with freely switchable voltage, wherein the control circuit includes a first control circuit for freely switching the power supply voltage, and a second control circuit and a third control circuit electrically connected to the first control circuit; wherein the second control circuit is a charging circuit; the third control circuit is a protection circuit; a toggle switch for controlling the real-time switching of the power supply voltage is provided in the first control circuit; the third pin of the toggle switch is respectively connected to one end of the ninth resistor, one end of the first transistor, and the second control circuit, and the other end of the ninth resistor is respectively connected to the output end and the other end of the first transistor; the third end of the first transistor is respectively connected to the output end and the third end of the second transistor; the first pin of the toggle switch is respectively connected to one end of the tenth resistor and one end of the second transistor, and the other end of the tenth resistor is respectively connected to the input end and the other end of the second transistor, so that the power supply voltage can be switched to output different voltages, and the battery voltage conversion and protection functions can be realized.

[0056] In other words, through the scheme of the present invention, fast and efficient voltage conversion between power supply voltages can be achieved to meet the voltage requirements of different devices. In terms of battery management optimization: through precise battery management, the battery is ensured to work under safe and efficient conditions, extending the battery life. In terms of user-friendliness: a simple and easy-to-use voltage switching mechanism can be provided, allowing users to easily select the required voltage output according to their needs. At the same time, in terms of environmental protection and energy saving: by using rechargeable lithium batteries instead of traditional dry batteries, the pollution of waste batteries to the environment is reduced, while achieving energy conservation and reuse.

[0057] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A control circuit suitable for a power supply and with freely switchable voltage, characterized in that: The control circuit includes a first control circuit for freely switching the power supply voltage, and a second control circuit and a third control circuit electrically connected to the first control circuit; wherein the second control circuit is a charging circuit; and the third control circuit is a protection circuit; The first control circuit is provided with a toggle switch for controlling the real-time switching of the power supply voltage output; the third pin of the toggle switch is respectively connected to one end of the ninth resistor, one end of the first transistor, and the second control circuit, and the other end of the ninth resistor is respectively connected to the output end and the other end of the first X; the third end of the first transistor is respectively connected to the output end and the third end of the second transistor; The first pin of the toggle switch is respectively connected to one end of the tenth resistor and one end of the second transistor, and the other end of the tenth resistor is respectively connected to the input end and the other end of the second transistor.

2. A control circuit suitable for power supply and with freely switchable voltage according to claim 1, characterized in that: Models of the first transistor and the second transistor are both XGC15P16AL.

3. A control circuit suitable for power supply and with freely switchable voltage according to claim 1, characterized in that: The second control circuit is provided with a first control chip; The first pin of the first control chip is connected to one end of the fifth resistor; the other end of the fifth resistor is grounded; the second pin of the first control chip is connected to the cathode of the first light-emitting diode; the anode of the first light-emitting diode is connected to the input end; The third pin of the first control chip is connected to one end of the sixth resistor; the other end of the sixth resistor and the fourth pin of the first control chip are grounded together; The sixth pin of the first control chip is connected to one end of the first inductor; the other end of the first inductor is respectively connected to the output end, one end of the second capacitor, and the eighth pin of the first control chip; the other end of the second capacitor is grounded; The seventh pin of the first control chip is connected to the input end and one end of the first capacitor respectively; the other end of the second capacitor is grounded.

4. A control circuit suitable for power supply and with freely switchable voltage according to claim 3, characterized in that: The model of the first control chip is XGC3F01.

5. A control circuit suitable for power supply and with freely switchable voltage according to claim 1, characterized in that: The third control circuit is provided with a fourth control chip; The first pin of the fourth control chip is respectively connected to the second pin of the fourth control chip and one end of the sixth capacitor; the other end of the sixth capacitor is respectively connected to the third pin of the fourth control chip and one end of the fourteenth resistor; The fourth pin of the fourth control chip is connected to one end of the twelfth resistor; the other end of the twelfth resistor, the fifth pin of the fourth control chip and the sixth pin of the fourth control chip are grounded in common.

6. A control circuit suitable for power supply and with freely switchable voltage according to claim 5, characterized in that: The model of the fourth control chip is XGC3F08B.

7. A control circuit suitable for power supply and with freely switchable voltage according to claim 1, characterized in that: The control circuit is also provided with an interface unit; The third pin of the interface unit is connected to one end of the first resistor; the fourth pin of the interface unit is connected to one end of the third resistor; the other end of the first resistor, the other end of the third resistor, the first pin of the interface unit and the sixth pin of the interface unit are grounded together.

8. A control circuit suitable for power supply and with freely switchable voltage according to claim 7, characterized in that: The model of the interface unit is TYPEC6P-LT1.

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