CN217427718U - Multi-battery-pack power supply circuit - Google Patents
Multi-battery-pack power supply circuit Download PDFInfo
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- CN217427718U CN217427718U CN202220804996.1U CN202220804996U CN217427718U CN 217427718 U CN217427718 U CN 217427718U CN 202220804996 U CN202220804996 U CN 202220804996U CN 217427718 U CN217427718 U CN 217427718U
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Abstract
The application discloses many battery package power supply circuit relates to circuit power supply technical field. The multi-battery pack power supply circuit includes: the battery pack comprises a plurality of battery packs, a plurality of comparison circuits and a plurality of MOS (metal oxide semiconductor) tubes, wherein the battery packs, the comparison circuits and the MOS tubes are in one-to-one correspondence; the source electrode of the MOS tube is connected with the output end of the corresponding battery pack; and the drains of the MOS tubes are connected to be used as the output end of the multi-battery pack power supply circuit. The first end of the input end of the comparison circuit is connected with the output end of the corresponding battery pack and used for acquiring the output voltage of the battery pack; the second end of the input end of the comparison circuit is connected with the output end of the multi-battery pack power supply circuit and used for acquiring the voltage of the output end of the multi-battery pack power supply circuit; the output end of the comparison circuit is connected with the grid electrode of the corresponding MOS tube and is used for controlling the conduction of the corresponding MOS tube when the difference value between the voltage of the first end of the comparison circuit and the voltage of the second end of the comparison circuit is larger than the conduction threshold value. The scheme provided by the application avoids serious heating of the battery pack during power supply.
Description
Technical Field
The application relates to the technical field of circuit power supply, in particular to a multi-battery-pack power supply circuit.
Background
With the continuous development of lithium battery products, the products are updated, the technology is continuously upgraded, the endurance capacity of the lithium battery products is also higher, and in order to improve the endurance capacity, a double-battery-pack discharge scheme and a multi-battery-pack discharge scheme are developed. At present, a diode is often used to avoid the impact of a reverse current during charging, fig. 1 is a structural diagram of a power supply circuit of a battery pack for realizing discharging of a dual battery pack by using the diode, as shown in the figure, a battery pack B1 and a battery pack B2 are respectively connected with anodes of a diode D1 and a diode D2, and cathodes of a diode D1 and a diode D2 are connected and used as output ends of the circuit.
However, the above-mentioned solution cannot balance the discharge of a plurality of battery packs, for example, when the difference between the output voltages of the battery pack B1 and the battery pack B2 is large, two battery packs will still discharge simultaneously, which may cause the battery packs to generate heat seriously.
In view of the above-mentioned technology, a circuit capable of avoiding the serious heat generation of the battery pack during the power supply is an urgent problem to be solved by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
The purpose of the application is to provide a multi-battery pack power supply circuit, so that serious heating of a battery pack during power supply is avoided.
In order to solve the above technical problem, the present application provides a multi-battery-pack power supply circuit, including: the device comprises a plurality of battery packs, a plurality of comparison circuits 10 and a plurality of MOS (metal oxide semiconductor) tubes, wherein the battery packs, the comparison circuits 10 and the MOS tubes are in one-to-one correspondence;
the source electrode of the MOS tube is connected with the output end of the corresponding battery pack;
the drain electrodes of the MOS tubes are connected to serve as the output end of the multi-battery pack power supply circuit;
the first end of the input end of the comparison circuit 10 is connected with the output end of the corresponding battery pack and is used for acquiring the output voltage of the battery pack;
the second end of the input end of each comparison circuit 10 is connected with the output end of the multi-battery-pack power supply circuit, and is used for acquiring the voltage of the output end of the multi-battery-pack power supply circuit;
the output end of the comparison circuit 10 is connected to the gate of the corresponding MOS transistor, and is configured to control the corresponding MOS transistor to be turned on when the voltage at the first end of the comparison circuit 10 is not less than the voltage at the second end of the comparison circuit 10.
Preferably, the MOS transistor is specifically a PMOS transistor; the comparison circuit 10 includes: the circuit comprises a first diode, a second diode, a first triode, a second triode, a first resistor, a second resistor, a third resistor and a fourth resistor;
the output end of the battery pack is connected with the corresponding input end of the first diode;
the first end of the first resistor is connected with the emitting electrode of the first triode, and the second end of the first resistor is connected with the base electrode of the first triode;
an emitting electrode of the first triode is connected with an output end of the first diode, a collector electrode of the first triode is connected with a first end of the third resistor, a base electrode of the first triode is connected with a base electrode of the second triode, and the base electrode of the first triode is also connected with the collector electrode of the first triode;
an emitting electrode of the second triode is connected with an output end of the second diode, and a collector electrode of the second triode is connected with a first end of the fourth resistor;
the collector electrode of the second triode is connected with the grid electrode of the corresponding PMOS tube;
the input end of the second diode is connected with the output end of the multi-battery pack power supply circuit, the input end of the second diode is also connected with the first end of the second resistor, and the second end of the second resistor is connected with the grid electrode of the PMOS tube;
and second ends of the third resistor and the fourth resistor are grounded.
Preferably, the MOS transistor is specifically an NMOS transistor; the comparison circuit 10 includes: the third diode, the fourth diode, the third triode, the fourth triode, the fifth resistor, the sixth resistor, the control circuit and the booster circuit;
the output end of the battery pack is connected with the input end of the corresponding third diode;
an emitting electrode of the third triode is connected with an output end of the third diode, a collector electrode of the third triode is connected with a first end of the fifth resistor, a second end of the fifth resistor is grounded, a base electrode of the third triode is connected with a base electrode of the fourth triode, and the base electrode of the third triode is also connected with a collector electrode of the third triode;
the first end of the sixth resistor is connected with the collector of the third triode, and the second end of the sixth resistor is connected with the emitter of the fourth triode;
an emitting electrode of the fourth triode is connected with an output end of the fourth diode, a collector electrode of the fourth triode is connected with a first end of the control circuit, and a second end of the control circuit is connected with a grid electrode of the corresponding NMOS tube;
and the booster circuit is connected with the grid electrode of the NMOS tube.
Preferably, the control circuit includes: a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, a fifth triode and a sixth triode;
the first end of the seventh resistor is connected with the collector of the fourth triode, the second end of the seventh resistor is connected with the base of the fifth triode, and the emitter of the fifth triode is grounded;
a first end of the eighth resistor is connected with an emitter of the fifth triode, and a second end of the eighth resistor is connected with a base of the fifth triode;
a collector of the fifth triode is connected with a first end of the ninth resistor, and a second end of the ninth resistor is connected with a base of the sixth triode;
a first end of the tenth resistor is connected with a base electrode of the sixth triode, and a second end of the tenth resistor is connected with an emitting electrode of the sixth triode;
and an emitting electrode of the sixth triode is connected with a grid electrode of the corresponding NMOS tube, and a collector electrode of the sixth triode is connected with the output end of the battery pack.
Preferably, the booster circuit includes: the voltage regulator comprises a voltage regulator tube, a seventh triode, a fifth diode, a sixth diode, a first capacitor, a second capacitor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor and a fifteenth resistor;
a first end of the eleventh resistor is connected with a boosting signal, a second end of the eleventh resistor is connected with a base electrode of the seventh triode, and an emitting electrode of the seventh triode is grounded;
a first end of the twelfth resistor is connected with an emitting electrode of the seventh triode, and a second end of the twelfth resistor is connected with a base electrode of the seventh triode;
the first end of the thirteenth resistor is connected with the power supply, the second end of the thirteenth resistor is connected with the collector of the seventh triode, the collector of the seventh triode is connected with the first end of the first capacitor, the second end of the first capacitor is connected with the input end of the fifth diode, and the output end of the fifth diode is connected with the first end of the fourteenth resistor;
the output end of the fifth diode is further connected with the first end of the second capacitor, the second end of the second capacitor is connected with the output end of the battery pack, the second end of the second capacitor is further connected with the input end of the sixth diode, and the output end of the sixth diode is connected with the input end of the fifth diode;
a second end of the fourteenth resistor is connected with a grid electrode of the corresponding NMOS tube;
the first end of each voltage-stabilizing tube is connected with the output end of the corresponding battery pack, and the second end of each voltage-stabilizing tube is connected with the grid electrode of the corresponding NMOS tube;
and a first end of the fifteenth resistor is connected with the output end of the corresponding battery pack, and a second end of the fifteenth resistor is connected with the grid electrode of the corresponding NMOS tube.
The application provides a many battery package power supply circuit includes: the battery pack comprises a plurality of battery packs, a plurality of comparison circuits and a plurality of MOS (metal oxide semiconductor) tubes, wherein the battery packs, the comparison circuits and the MOS tubes are in one-to-one correspondence; the source electrode of the MOS tube is connected with the output end of the corresponding battery pack; the drain electrodes of the MOS tubes are connected to serve as the output end of the multi-battery-pack power supply circuit, and the MOS tubes are used for avoiding reverse current impact during charging. However, generally, the electric quantities of a plurality of battery packs are different, and the discharge of the plurality of battery packs needs to be balanced, so that a comparison circuit is added, and a first end of an input end of the comparison circuit is connected with an output end of the corresponding battery pack and used for acquiring the output voltage of the battery pack; the second end of the input end of the comparison circuit is connected with the output end of the multi-battery-pack power supply circuit and used for acquiring the voltage of the output end of the multi-battery-pack power supply circuit; the output end of the comparison circuit is connected with the grid electrode of the corresponding MOS tube and is used for controlling the conduction of the corresponding MOS tube when the difference value between the voltage of the first end of the comparison circuit and the voltage of the second end of the comparison circuit is larger than the conduction threshold value. When power is supplied, the voltage of the output end of the multi-battery-pack power supply circuit is basically the same as the maximum voltage of the plurality of battery packs, so that when the battery pack is less than the residual electric quantity of the rest battery packs, the MOS tube of the battery pack is disconnected, only the battery pack with the large electric quantity discharges, the discharging of the plurality of battery packs is balanced, and the battery packs are prevented from being heated seriously when power is supplied.
Drawings
In order to more clearly illustrate the embodiments of the present application, the drawings needed for the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings can be obtained by those skilled in the art without inventive effort.
FIG. 1 is a diagram of a battery pack power supply circuit employing diodes to achieve dual battery pack discharge;
fig. 2 is a structural diagram of a multi-battery-pack power supply circuit implemented by using MOS transistors according to an embodiment of the present application;
fig. 3 is a structural diagram of a multi-battery-pack power supply circuit implemented by using PMOS transistors according to an embodiment of the present disclosure;
fig. 4 is a structural diagram of a multi-battery-pack power supply circuit implemented by using NMOS transistors according to an embodiment of the present application;
the reference numbers are as follows: reference numeral 10 denotes a comparator circuit.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without any creative effort belong to the protection scope of the present application.
The core of the application is to provide a multi-battery-pack power supply circuit.
In order that those skilled in the art will better understand the disclosure, the following detailed description will be given with reference to the accompanying drawings.
In order to solve the problem that the diode cannot discharge in a balanced manner, a Metal Oxide Semiconductor Field Effect Transistor (MOS Transistor) is used to replace the diode so as to avoid the impact of reverse current during charging and realize balanced discharge of multiple battery packs. The embodiment of the application provides a many battery package power supply circuit, includes: the battery pack comprises a plurality of battery packs, a plurality of comparison circuits and a plurality of MOS (metal oxide semiconductor) tubes, wherein the battery packs, the comparison circuits and the MOS tubes are in one-to-one correspondence; the source electrode of the MOS tube is connected with the output end of the corresponding battery pack; the drain electrodes of the MOS tubes are connected to serve as the output end of the multi-battery-pack power supply circuit; the first end of the input end of the comparison circuit is connected with the output end of the corresponding battery pack and used for acquiring the output voltage of the battery pack; the second end of the input end of each comparison circuit is connected with the output end of the multi-battery pack power supply circuit and used for acquiring the voltage of the output end of the multi-battery pack power supply circuit; the output end of the comparison circuit is connected with the grid electrode of the corresponding MOS tube and used for controlling the conduction of the corresponding MOS tube when the voltage of the first end of the comparison circuit is not less than the voltage of the second end of the comparison circuit.
Fig. 2 is a structural diagram of a multi-battery-pack power supply circuit implemented by using MOS transistors according to an embodiment of the present application; it should be noted that the structure in fig. 2 is only one of the structures provided in the embodiments of the present application, and does not limit other structures in the present application, and the present application does not limit the number of battery packs in the multi-battery-pack power supply circuit, and the multi-battery-pack power supply circuit may be a dual-battery-pack power supply circuit, and the number of the comparison circuit 10 and the number of the MOS transistors M1 generally correspond to the number of battery packs. The MOS transistor M1 may be a PMOS transistor and an NMOS transistor, the structure of the comparison circuit 10 is not particularly limited, and in general, different MOS transistors M1 use different comparison circuits 10 to achieve corresponding effects, and the battery pack, the comparison circuit 10, and the MOS transistor M1 are in one-to-one correspondence. As shown in fig. 2, only one of the battery packs and the corresponding circuit structure are provided, and the rest of the circuit structures are similar to those in the figure, and the source of the MOS transistor M1 is connected to the output terminal (i.e., B1+) of the corresponding battery pack; the drains of the MOS tubes M1 are connected to serve as the output end (namely OUT) of the multi-battery-pack power supply circuit; the first end of the input end of the comparison circuit 10 is connected with the output end B1+ of the corresponding battery pack, and is used for acquiring the output voltage of the battery pack; the second end of the input end of each comparison circuit 10 is connected with the output end OUT of the multi-battery-pack power supply circuit and is used for acquiring the voltage of the output end of the multi-battery-pack power supply circuit; the output end of the comparison circuit 10 is connected to the gate of the corresponding MOS transistor M1, the output end OUT of the multi-battery-pack power supply circuit is generally connected to a load and supplies power to the load, and this power supply process is continuous, at the initial time of power supply, the MOS transistor M1 has a certain voltage drop, after a period of time, the voltage drop of the MOS transistor M1 approaches zero, and at this time, the voltage at the output end of the multi-battery-pack power supply circuit is substantially the same as the maximum voltage in the plurality of battery packs (generally, the voltage drop may occur in the MOS transistor M1, and the voltage at the output end of the multi-battery-pack power supply circuit is slightly lower than the maximum voltage in the plurality of battery packs), and when the voltage at the first end of the comparison circuit 10 is not lower than the voltage at the second end of the comparison circuit 10, the corresponding MOS transistor M1 is controlled to be turned on. When the residual electric quantity of the battery pack is less than that of the rest battery packs, the MOS tube M1 of the battery pack is disconnected, the battery pack with the most electric quantity discharges, then the electric quantities of the battery packs gradually tend to be balanced, and after the balance is realized, the battery packs discharge at the same time to provide enough voltage for the load.
The application provides a many battery package power supply circuit includes: the battery pack comprises a plurality of battery packs, a plurality of comparison circuits and a plurality of MOS (metal oxide semiconductor) tubes, wherein the battery packs, the comparison circuits and the MOS tubes are in one-to-one correspondence; the source electrode of the MOS tube is connected with the output end of the corresponding battery pack; the drain electrodes of the MOS tubes are connected to serve as the output end of the multi-battery-pack power supply circuit, and the MOS tubes are used for avoiding reverse current impact during charging. However, generally, the electric quantities of the plurality of battery packs are different, and the discharge of the plurality of battery packs needs to be balanced, so that a comparison circuit is added, and a first end of an input end of the comparison circuit is connected with an output end of the corresponding battery pack to obtain the output voltage of the battery pack; the second end of the input end of the comparison circuit is connected with the output end of the multi-battery pack power supply circuit and used for acquiring the voltage of the output end of the multi-battery pack power supply circuit; the output end of the comparison circuit is connected with the grid electrode of the corresponding MOS tube and is used for controlling the conduction of the corresponding MOS tube when the difference value between the voltage of the first end of the comparison circuit and the voltage of the second end of the comparison circuit is larger than the conduction threshold value. When power is supplied, the voltage of the output end of the multi-battery-pack power supply circuit is basically the same as the maximum voltage of the plurality of battery packs, so that when the battery pack is less than the residual electric quantity of the rest battery packs, the MOS tube of the battery pack is disconnected, only the battery pack with the large electric quantity discharges, the discharging of the plurality of battery packs is balanced, and the battery packs are prevented from being heated seriously when power is supplied.
In specific implementation, if the MOS transistor is a PMOS transistor, the circuit structure is also changed accordingly, fig. 3 is a structure diagram of a multi-battery-pack power supply circuit implemented by using PMOS transistors according to an embodiment of the present application, and as shown in fig. 3, the comparison circuit includes: the circuit comprises a first diode D1, a second diode D2, a first triode Q1, a second triode Q2, a first resistor R1, a second resistor R2, a third resistor R3 and a fourth resistor R4; the output end of the battery pack is connected with the input end of the corresponding first diode D1; a first end of the first resistor R1 is connected with an emitter of the first triode Q1, and a second end of the first resistor R1 is connected with a base of the first triode Q1; an emitter of the first triode Q1 is connected with an output end of the first diode D1, a collector of the first triode Q1 is connected with a first end of the third resistor R3, a base of the first triode Q1 is connected with a base of the second triode Q2, and a base of the first triode Q1 is also connected with a collector of the first triode Q1; an emitter of the second triode Q2 is connected with the output end of the second diode D2, and a collector of the second triode Q2 is connected with a first end of the fourth resistor R4; the collector electrode of the second triode Q2 is connected with the grid electrode of the corresponding PMOS tube; the input end of the second diode D2 is connected with the output end of the multi-battery-pack power supply circuit, the input end of the second diode D2 is also connected with the first end of a second resistor R2, and the second end of the second resistor R2 is connected with the grid electrode of the PMOS tube; the second ends of the third resistor R3 and the fourth resistor R4 are grounded. Taking a dual-battery-pack power supply circuit as an example, the dual-battery-pack power supply circuit comprises battery packs B1 and B2, when the voltage of B1+ is greater than B2+, the voltage of B1+ is basically the same as the voltage of an output end OUT of the multi-battery-pack power supply circuit, and a second triode Q2 corresponding to B1+ is conducted, so that a PMOS (P-channel metal oxide semiconductor) tube corresponding to B1+ is conducted, and the battery pack B1 discharges; and the voltage of the B2+ is lower than the voltage of the output end OUT of the multi-battery-pack power supply circuit, and the second triode Q2 corresponding to the B2+ is disconnected, so that the PMOS tube corresponding to the B2+ is disconnected, and the battery pack B2 cannot discharge. In the embodiment of the application, the MOS transistor adopts a PMOS transistor, and a corresponding comparison circuit structure is provided, so that the equalization effect can be better completed.
In specific implementation, if the MOS transistor is specifically an NMOS transistor, the comparison circuit is also changed accordingly, and fig. 4 is a structure diagram of a multi-battery-pack power supply circuit implemented by using NMOS transistors according to an embodiment of the present application; as shown in fig. 4, the comparison circuit includes: the circuit comprises a third diode D3, a fourth diode D4, a third triode Q3, a fourth triode Q4, a fifth resistor R5, a sixth resistor R6, a control circuit and a booster circuit; the output end of the battery pack is connected with the input end of the corresponding third diode D3; an emitter of the third triode Q3 is connected with an output end of the third diode D3, a collector of the third triode Q3 is connected with a first end of a fifth resistor R5, a second end of the fifth resistor R5 is grounded, a base of the third triode Q3 is connected with a base of a fourth triode Q4, and a base of the third triode Q3 is also connected with a collector of the third triode Q3; a first end of the sixth resistor R6 is connected to the collector of the third transistor Q3, and a second end of the sixth resistor R6 is connected to the emitter of the fourth transistor Q4; an emitter of the fourth triode Q4 is connected with the output end of the fourth diode D4, a collector of the fourth triode Q4 is connected with the first end of the control circuit, and the second end of the control circuit is connected with the grid electrode of the corresponding NMOS tube; the booster circuit is connected with the grid electrode of the NMOS tube.
The structure of the control circuit is not limited in the above, and the embodiment of the present application provides a structure of a control circuit, as shown in fig. 4, including: a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, a fifth triode Q5 and a sixth triode Q6; a first end of the seventh resistor R7 is connected to a collector of the fourth transistor Q4, a second end of the seventh resistor R7 is connected to a base of the fifth transistor Q5, and an emitter of the fifth transistor Q5 is grounded; a first end of the eighth resistor R8 is connected to an emitter of the fifth transistor Q5, and a second end of the eighth resistor R8 is connected to a base of the fifth transistor Q5; a collector of the fifth triode Q5 is connected to a first terminal of a ninth resistor R9, and a second terminal of the ninth resistor R9 is connected to a base of the sixth triode Q6; a first end of the tenth resistor R10 is connected to the base of the sixth transistor Q6, and a second end of the tenth resistor R10 is connected to the emitter of the sixth transistor Q6; the emitter of the sixth triode Q6 is connected to the gate of the corresponding NMOS transistor, and the collector of the sixth triode Q6 is connected to the output terminal of the battery pack. For example, in the control circuit, if the corresponding seventh resistor R7 is at a high level, the fifth transistor Q5 is turned on, the sixth transistor Q6 is turned on, the gate and the source of the corresponding NMOS transistor are shorted, and the corresponding battery pack cannot supply power, if the seventh resistor R7 of a battery pack is at a low level, the corresponding fifth transistor Q5 is turned off, and the sixth transistor Q6 is turned off, the voltage between the gate and the source of the corresponding NMOS transistor is 15V (selected 15V regulator), and the battery pack participates in power supply.
The structure of the boost circuit is not limited in the above, and the embodiment of the present application provides a structure of a boost circuit, as shown in fig. 4, including: a voltage regulator DZ, a seventh triode Q7, a fifth diode D5, a sixth diode D6, a first capacitor C1, a second capacitor C2, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14 and a fifteenth resistor R15; a first end of the eleventh resistor R11 is connected with a boosting signal, a second end of the eleventh resistor R11 is connected with a base electrode of the seventh triode Q7, and an emitting electrode of the seventh triode Q7 is grounded; a first end of the twelfth resistor R12 is connected to an emitter of the seventh transistor Q7, and a second end of the twelfth resistor R12 is connected to a base of the seventh transistor Q7; a first end of the thirteenth resistor R13 is connected to the power supply, a second end of the thirteenth resistor R13 is connected to a collector of the seventh triode Q7, a collector of the seventh triode Q7 is connected to a first end of a first capacitor C1, a second end of the first capacitor C1 is connected to an input end of a fifth diode D5, and an output end of the fifth diode D5 is connected to a first end of a fourteenth resistor R14; the output end of the fifth diode D5 is further connected to the first end of the second capacitor C2, the second end of the second capacitor C2 is connected to the output end of the battery pack, the second end of the second capacitor C2 is further connected to the input end of the sixth diode D6, and the output end of the sixth diode D6 is connected to the input end of the fifth diode D5; a second end of the fourteenth resistor R14 is connected with the gate of the corresponding NMOS transistor; the first end of the voltage-stabilizing tube DZ is connected with the output end of the corresponding battery pack, and the second end of the voltage-stabilizing tube DZ is connected with the grid electrode of the corresponding NMOS tube; the first end of the fifteenth resistor R15 is connected with the output end of the corresponding battery pack, and the second end of the fifteenth resistor R15 is connected with the grid electrode of the corresponding NMOS transistor. The grid voltage of the NMOS tube is raised through continuous high-frequency oscillation of the I/O port BOOST of the singlechip, and the voltage of the NMOS tube in the figure is RS1- + DZ (voltage stabilizing value of a voltage stabilizing tube, generally selected 15V voltage stabilizing tube).
The third transistor Q3 is used to cancel the effect of the conduction voltage difference of the parasitic diode in the fourth transistor Q4, and when BP1+ is not less than RS1-, the fourth transistor Q4 is turned on. When the fourth transistor Q4 is turned on, the seventh resistor R7 is at a high level, and the corresponding MOS transistor is turned off, and correspondingly, the seventh resistor R7 is at a low level, and the corresponding MOS transistor is turned on. It should be noted that the solution in the embodiment of the present application is only one of the embodiments in the present application, and other solutions may be used instead in specific implementation. According to the embodiment of the application, the NMOS tube is used for realizing the balance effect, and heating can be prevented.
The multi-battery-pack power supply circuit provided by the application is described in detail above. The embodiments are described in a progressive manner in the specification, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present application without departing from the principle of the present application, and such improvements and modifications also fall within the scope of the claims of the present application.
It is further noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the same element.
Claims (5)
1. A multi-cell pack power supply circuit, comprising: the device comprises a plurality of battery packs, a plurality of comparison circuits (10) and a plurality of MOS (metal oxide semiconductor) tubes, wherein the battery packs, the comparison circuits (10) and the MOS tubes are in one-to-one correspondence;
the source electrode of the MOS tube is connected with the output end of the corresponding battery pack;
the drain electrodes of the MOS tubes are connected to serve as the output end of the multi-battery pack power supply circuit;
the first end of the input end of the comparison circuit (10) is connected with the output end of the corresponding battery pack and used for obtaining the output voltage of the battery pack;
the second end of the input end of each comparison circuit (10) is connected with the output end of the multi-battery-pack power supply circuit and used for acquiring the voltage of the output end of the multi-battery-pack power supply circuit;
the output end of the comparison circuit (10) is connected with the grid electrode of the corresponding MOS tube and used for controlling the conduction of the corresponding MOS tube when the voltage of the first end of the comparison circuit (10) is not less than the voltage of the second end of the comparison circuit (10).
2. The multi-battery-pack power supply circuit according to claim 1, wherein the MOS transistors are specifically PMOS transistors; the comparison circuit (10) comprises: the circuit comprises a first diode, a second diode, a first triode, a second triode, a first resistor, a second resistor, a third resistor and a fourth resistor;
the output end of the battery pack is connected with the input end of the corresponding first diode;
the first end of the first resistor is connected with the emitting electrode of the first triode, and the second end of the first resistor is connected with the base electrode of the first triode;
an emitting electrode of the first triode is connected with an output end of the first diode, a collector electrode of the first triode is connected with a first end of the third resistor, a base electrode of the first triode is connected with a base electrode of the second triode, and the base electrode of the first triode is also connected with the collector electrode of the first triode;
an emitting electrode of the second triode is connected with an output end of the second diode, and a collector electrode of the second triode is connected with a first end of the fourth resistor;
the collector electrode of the second triode is connected with the grid electrode of the corresponding PMOS tube;
the input end of the second diode is connected with the output end of the multi-battery pack power supply circuit, the input end of the second diode is also connected with the first end of the second resistor, and the second end of the second resistor is connected with the grid electrode of the PMOS tube;
and second ends of the third resistor and the fourth resistor are grounded.
3. The multi-battery-pack power supply circuit according to claim 1, wherein the MOS transistor is specifically an NMOS transistor; the comparison circuit (10) comprises: the circuit comprises a third diode, a fourth diode, a third triode, a fourth triode, a fifth resistor, a sixth resistor, a control circuit and a booster circuit;
the output end of the battery pack is connected with the input end of the corresponding third diode;
an emitting electrode of the third triode is connected with an output end of the third diode, a collector electrode of the third triode is connected with a first end of the fifth resistor, a second end of the fifth resistor is grounded, a base electrode of the third triode is connected with a base electrode of the fourth triode, and the base electrode of the third triode is also connected with a collector electrode of the third triode;
the first end of the sixth resistor is connected with the collector of the third triode, and the second end of the sixth resistor is connected with the emitter of the fourth triode;
an emitting electrode of the fourth triode is connected with an output end of the fourth diode, a collector electrode of the fourth triode is connected with a first end of the control circuit, and a second end of the control circuit is connected with a grid electrode of the corresponding NMOS tube;
and the booster circuit is connected with the grid electrode of the NMOS tube.
4. The multi-cell packet power supply circuit of claim 3, wherein the control circuit comprises: a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, a fifth triode and a sixth triode;
the first end of the seventh resistor is connected with the collector of the fourth triode, the second end of the seventh resistor is connected with the base of the fifth triode, and the emitter of the fifth triode is grounded;
a first end of the eighth resistor is connected with an emitter of the fifth triode, and a second end of the eighth resistor is connected with a base of the fifth triode;
a collector of the fifth triode is connected with a first end of the ninth resistor, and a second end of the ninth resistor is connected with a base of the sixth triode;
a first end of the tenth resistor is connected with a base electrode of the sixth triode, and a second end of the tenth resistor is connected with an emitting electrode of the sixth triode;
and an emitting electrode of the sixth triode is connected with a grid electrode of the corresponding NMOS tube, and a collector electrode of the sixth triode is connected with an output end of the battery pack.
5. The multi-cell-pack power supply circuit of claim 4, wherein the boost circuit comprises: the voltage regulator comprises a voltage regulator tube, a seventh triode, a fifth diode, a sixth diode, a first capacitor, a second capacitor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor and a fifteenth resistor;
a first end of the eleventh resistor is connected with a boosting signal, a second end of the eleventh resistor is connected with a base electrode of the seventh triode, and an emitting electrode of the seventh triode is grounded;
a first end of the twelfth resistor is connected with an emitting electrode of the seventh triode, and a second end of the twelfth resistor is connected with a base electrode of the seventh triode;
the first end of the thirteenth resistor is connected with the power supply, the second end of the thirteenth resistor is connected with the collector of the seventh triode, the collector of the seventh triode is connected with the first end of the first capacitor, the second end of the first capacitor is connected with the input end of the fifth diode, and the output end of the fifth diode is connected with the first end of the fourteenth resistor;
the output end of the fifth diode is further connected with the first end of the second capacitor, the second end of the second capacitor is connected with the output end of the battery pack, the second end of the second capacitor is further connected with the input end of the sixth diode, and the output end of the sixth diode is connected with the input end of the fifth diode;
a second end of the fourteenth resistor is connected with a grid electrode of the corresponding NMOS tube;
the first end of each voltage-stabilizing tube is connected with the output end of the corresponding battery pack, and the second end of each voltage-stabilizing tube is connected with the grid electrode of the corresponding NMOS tube;
and a first end of the fifteenth resistor is connected with the output end of the corresponding battery pack, and a second end of the fifteenth resistor is connected with the grid electrode of the corresponding NMOS tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220804996.1U CN217427718U (en) | 2022-04-08 | 2022-04-08 | Multi-battery-pack power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220804996.1U CN217427718U (en) | 2022-04-08 | 2022-04-08 | Multi-battery-pack power supply circuit |
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| Publication Number | Publication Date |
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| CN217427718U true CN217427718U (en) | 2022-09-13 |
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|---|---|---|---|
| CN202220804996.1U Active CN217427718U (en) | 2022-04-08 | 2022-04-08 | Multi-battery-pack power supply circuit |
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| CN (1) | CN217427718U (en) |
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