CN113315205A - Power supply circuit - Google Patents

Power supply circuit Download PDF

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Publication number
CN113315205A
CN113315205A CN202110639160.0A CN202110639160A CN113315205A CN 113315205 A CN113315205 A CN 113315205A CN 202110639160 A CN202110639160 A CN 202110639160A CN 113315205 A CN113315205 A CN 113315205A
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CN
China
Prior art keywords
control
battery pack
circuit
switch
switching tube
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202110639160.0A
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Chinese (zh)
Inventor
卢世勇
邓健
丁西伦
田青
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Haisi Micro Xiamen Electronics Co ltd
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Haisi Micro Xiamen Electronics Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Haisi Micro Xiamen Electronics Co ltd filed Critical Haisi Micro Xiamen Electronics Co ltd
Priority to CN202110639160.0A priority Critical patent/CN113315205A/en
Publication of CN113315205A publication Critical patent/CN113315205A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters

Abstract

The invention discloses a power supply circuit which comprises a control circuit, a switch circuit and N battery packs, wherein the control circuit determines M battery packs capable of outputting expected voltage values and controls the switch circuit to enable the determined M battery packs to output the expected voltage values through the switch circuit, and the selected battery packs are different when the expected voltage values are different, so that the N battery packs can provide different voltage values. Therefore, the plurality of battery packs are arranged in the power supply device, the power supply circuit can output various voltage values through different combinations, and various requirements of users are met.

Description

Power supply circuit
Technical Field
The invention relates to the technical field of power electronics, in particular to a power supply circuit.
Background
The power supply circuit in the prior art is generally provided with one battery or a plurality of batteries connected in series, a switch is arranged between the battery and the external equipment, the connection and disconnection of the battery and the external equipment are controlled by controlling the on and off of the switch, each battery supplies power to the electric equipment after the control switch is switched on, and each battery cannot supply power to the electric equipment after the switch is switched off. Therefore, the power supply circuit can only output a voltage with one voltage value when supplying power to the external device, and cannot meet the requirements of users on various voltage values.
Disclosure of Invention
The invention aims to provide a power supply circuit, which is provided with a plurality of battery packs, and can enable the power supply circuit to output various voltage values through different combinations, thereby meeting various requirements of users.
In order to solve the technical problem, the invention provides a power supply circuit, which comprises a control circuit, a switch circuit and N battery packs; the N battery packs are sequentially connected in series; the control end of the switch circuit is connected with the control end of the control circuit, the switch circuit is arranged between the N battery packs and external equipment, and the switch circuit is connected with the anodes and the cathodes of the N battery packs; n is an integer not less than 1;
the control circuit is used for determining M battery packs to be operated based on expected voltage values and rated voltage values of the N battery packs, and controlling the switch circuit to enable the determined M battery packs to output the expected voltage values through the switch circuit; m is an integer of not less than 1 and not more than N.
Preferably, the switching circuit comprises a plurality of switching tubes; the control ends of the switch tubes are respectively connected with the control ends of the control circuit in a one-to-one correspondence manner;
the first end of the first switch tube is connected with the first end of the external equipment, and the second end of the first switch tube is connected with the head end of the battery pack connected in series; the first end of the second switch tube is connected with the tail ends of the battery packs connected in series, the second end of the second switch tube is connected with the second end of the external equipment, and two ends of each battery pack are connected with one switch tube in parallel;
the control circuit is specifically used for determining M battery packs needing to output voltage based on an expected voltage value and the rated voltage values of the N battery packs, and controlling the on and off of each switch tube in the switch circuit so that the determined M battery packs output the expected voltage value through the switch circuit; m is an integer of not less than 1 and not more than N.
Preferably, the battery pack comprises a first battery pack and a second battery pack, and the second end of the first battery pack is connected with the first end of the second battery pack; the switching circuit comprises a first switching tube, a second switching tube, a third switching tube and a fourth switching tube;
the first end of the first switch tube is connected with the first end of the external equipment, the second end of the first switch tube is connected with the first end of the first battery pack, and the control end of the first switch tube is connected with the first control end of the control circuit;
the first end of the second switch tube is connected with the second end of the second battery pack, the second end of the second switch tube is connected with the second end of the external equipment, and the control end of the second switch tube is connected with the second control end of the control circuit;
the first end of the third switching tube is connected with the first end of the external equipment, the second end of the third switching tube is connected with the second end of the first battery pack and the voltage clamping end of the control circuit, and the control end of the third switching tube is connected with the third control end of the control circuit;
the first end of the fourth switch tube is connected with the second end of the second switch tube, the second end of the fourth switch tube is connected with the second end of the second battery pack and the second end of the external device, and the control end of the fourth switch tube is connected with the fourth control end of the control circuit.
Preferably, the control circuit is specifically configured to control the first switching tube and the second switching tube to be turned on, and when the third switching tube and the fourth switching tube are turned off, the voltage value output by the power supply circuit is the sum of the rated voltage of the first battery pack and the rated voltage of the second battery pack; the first switching tube and the second switching tube are controlled to be disconnected, and when the third switching tube and the fourth switching tube are closed, the voltage value output by the power supply circuit is zero; controlling the first switching tube and the fourth switching tube to be closed, and enabling the voltage value output by the power supply circuit to be the rated voltage of the first battery pack when the second switching tube and the third switching tube are disconnected; and controlling the first switching tube and the fourth switching tube to be disconnected, and enabling the voltage value output by the power supply circuit to be the rated voltage of the second battery pack when the second switching tube and the third switching tube are closed.
Preferably, each of the switching tubes is a metal-oxide semiconductor field effect transistor MOS tube.
Preferably, each battery data acquisition end of the control circuit is respectively connected with each battery pack in a one-to-one correspondence manner;
the control circuit is further used for acquiring data information of each battery pack, judging whether the battery pack has a fault according to the data information, and controlling the on-off of the switch circuit when the battery pack is judged to have the fault so as to stop outputting the battery pack with the fault.
Preferably, each battery pack comprises one battery or a plurality of batteries connected in series in sequence.
Preferably, the control circuit comprises a processor and X control chips; x is an integer greater than 0 and less than N;
the information interaction ends of the control chips are sequentially connected, and the processor is connected with the information interaction end of any one of the control chips;
the processor is used for determining M battery packs to be operated based on the expected voltage value and the rated voltage values of the N battery packs and generating control signals;
each control chip is used for controlling the switch circuit based on the control signal so as to enable the determined M battery packs to output the expected voltage value through the switch circuit; m is an integer of not less than 1 and not more than N.
The application provides a power supply circuit, including control circuit, switch circuit and a N battery package, control circuit is through confirming M battery package that can output expected voltage value to control switch circuit, so that the M battery package of confirming passes through switch circuit output expected voltage value, wherein, expected voltage value is different, and the battery package of selecting is different, and consequently, a plurality of different voltage values can be provided to a N battery package. Therefore, the plurality of battery packs are arranged in the power supply device, the power supply circuit can output various voltage values through different combinations, and various requirements of users are met.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed in the prior art and 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 invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a power supply circuit according to the present invention;
FIG. 2 is a schematic diagram of a power supply circuit in the prior art;
FIG. 3 is a schematic diagram of another prior art power supply circuit;
FIG. 4 is a schematic diagram of voltage values that can be output by the power supply circuit provided by the present invention;
fig. 5 is a schematic structural diagram of a power supply circuit according to the present invention;
fig. 6 is a schematic diagram of voltage values that can be output by the first battery pack and the second battery pack according to the present invention;
fig. 7 is a schematic diagram illustrating connection of batteries in a battery pack according to the present invention;
fig. 8 is a schematic structural diagram of a power supply circuit provided with a plurality of control chips according to the present invention.
Detailed Description
The core of the invention is to provide a power supply circuit, which is provided with a plurality of battery packs, and can enable the power supply circuit to output various voltage values through different combinations, thereby meeting various requirements of users.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a power supply circuit provided in the present invention, where the power supply circuit includes a control circuit 1, a switch circuit 2, and N battery packs 3; the N battery packs 3 are sequentially connected in series; the control end of the switch circuit 2 is connected with the control end of the control circuit 1, the switch circuit 2 is arranged between the N battery packs 3 and external equipment, and the switch circuit 2 is connected with the anodes and the cathodes of the N battery packs 3; n is an integer not less than 1;
the control circuit 1 is used for determining M battery packs 3 to be operated based on the expected voltage value and the rated voltage values of the N battery packs 3, and controlling the switch circuit 2 to enable the determined M battery packs 3 to output the expected voltage value through the switch circuit 2; m is an integer of not less than 1 and not more than N.
Referring to fig. 2 and 3, fig. 2 is a schematic structural diagram of a power supply circuit in the prior art, and fig. 3 is a schematic structural diagram of another power supply circuit in the prior art. The applicant considers that the power supply circuit in the prior art usually has a fixed number of batteries, and the switch between supplying and stopping supplying power is realized through one switch S1, so that the power supply circuit in the prior art can only provide one voltage value for the user, and cannot meet the requirements of the user for various voltage values. Based on this, a plurality of battery packs 3 are provided in the present application, and output is performed by controlling the battery packs 3 of different combinations, thereby realizing output of a plurality of different voltage values.
Specifically, in the present embodiment, N battery packs 3 are provided, the control circuit 1 determines M battery packs 3 according to a desired voltage value set by a user and a rated voltage of each battery pack 3, and the determined total voltage output by the M battery packs 3 is the desired voltage value, connects the switch circuit 2 to each battery pack 3, and controls the switch circuit 2, thereby realizing that the determined M battery packs 3 output voltages so that the power supply circuit outputs the desired voltage value.
Referring to fig. 4, fig. 4 is a schematic diagram of voltage values that can be output by the power supply circuit provided by the present invention. The rated voltage of each battery pack 3 is set to be V in the figureBATAnd n battery packs 3 are provided.
Of course, if the desired voltage value set by the user is changed, the battery pack 3 to be operated may be newly determined, so that the newly determined battery pack 3 to be operated outputs the changed desired voltage value.
It should be noted that the rated voltages of the battery packs 3 may be equal or different, and the present application does not limit this.
In addition, each battery pack 3 in the present application is connected to each other in an end-to-end manner, specifically, the negative electrode of the first battery pack 3 is connected to the positive electrode of the second battery pack 3, the negative electrode of the second battery pack 3 is connected to the positive electrode of the third battery pack 3, and so on, the negative electrode of the I-th battery pack 3 is connected to the positive electrode of the I + 1-th battery pack 3, so as to sequentially connect the battery packs 3 in series.
When the external device is a charger, the desired battery pack 3 can be charged by controlling the switch circuit 2.
In conclusion, a plurality of battery packs 3 are arranged in the application, so that the power supply circuit can output various voltage values through different combinations, and various requirements of users are met.
On the basis of the above-described embodiment:
as a preferred embodiment, the switching circuit 2 includes a plurality of switching tubes; the control ends of the switch tubes are respectively connected with the control ends of the control circuit 1 in a one-to-one correspondence manner;
wherein, a first end of the first switching tube M1 is connected with a first end of an external device, and a second end is connected with a head end of the battery pack 3 connected in series; a first end of the second switch tube M2 is connected with the tail end of the battery pack 3 connected in series, a second end is connected with a second end of the external device, and two ends of each battery pack 3 are connected in parallel with a switch tube;
the control circuit 1 is specifically configured to determine M battery packs 3 that need to output voltage based on the desired voltage value and the rated voltage values of the N battery packs 3, and control on and off of each switching tube in the switching circuit 2, so that the determined M battery packs 3 output the desired voltage value through the switching circuit 2; m is an integer of not less than 1 and not more than N.
The switch circuit 2 in this embodiment is provided with a plurality of switch tubes, and the control circuit 1 controls the on and off of each switch tube, thereby controlling the switch circuit 2.
Specifically, the head and tail ends of the battery packs 3 connected in series are respectively connected with a switch tube, and if and only if only the first switch tube M1 and the second switch tube M2 are turned on, all the battery packs 3 output voltage; in addition, a switch tube is connected in parallel at the two ends of each battery pack 3, when the switch tube connected with the battery pack 3 is switched on, the battery pack 3 cannot output voltage, and when the switch tube connected with the battery pack 3 is switched off, the battery pack 3 can output voltage, and each switch tube in the switch circuit 2 is controlled in such a way, so that the M battery packs 3 to be operated can output the rated voltage of the battery packs, and the voltage output by the power supply circuit is ensured to be the expected voltage value.
As a preferred embodiment, the battery pack 3 includes a first battery pack and a second battery pack, and the second end of the first battery pack is connected to the first end of the second battery pack; the switch circuit 2 comprises a first switch tube M1, a second switch tube M2, a third switch tube M3 and a fourth switch tube M4;
a first end of the first switching tube M1 is connected with a first end of an external device, a second end is connected with a first end of the first battery pack, and a control end is connected with a first control end of the control circuit 1;
a first end of the second switching tube M2 is connected with a second end of the second battery pack, a second end of the second switching tube M2 is connected with a second end of the external device, and a control end of the second switching tube M2 is connected with a second control end of the control circuit 1;
a first end of the third switching tube M3 is connected with a first end of an external device, a second end is connected with a second end of the first battery pack and a voltage clamping end of the control circuit 1, and a control end is connected with a third control end of the control circuit 1;
a first end of the fourth switching tube M4 is connected to the second end of the second switching tube M2, a second end of the fourth switching tube M4 is connected to the second end of the second battery pack and the second end of the external device, and a control end of the fourth switching tube M4 is connected to the fourth control end of the control circuit 1.
Referring to fig. 5, fig. 5 is a specific structural schematic diagram of a power supply circuit according to the present invention. In this embodiment, taking two battery packs 3 as an example, a first switching tube M1 and a second switching tube M2 are connected in series at two ends of the two battery packs 3, a third switching tube M3 is connected in parallel at two ends of the first battery pack, and a fourth switching tube M4 is connected in parallel at two ends of the second battery pack, when the first switching tube M1 and the second switching tube M2 are controlled to be turned on simultaneously and the third switching tube M3 and the fourth switching tube M4 are turned off simultaneously, both the first battery pack and the second battery pack can output voltage; when the switch tube connected with the first battery pack in parallel is turned off, the first battery pack cannot output voltage; when the switch tube connected with the second battery pack in parallel is turned off, the second battery pack cannot output voltage. Based on this, whether the battery pack 3 outputs or not can be controlled by controlling the switching tube.
As can be seen from fig. 5, the drain of the first switching transistor M1 is the positive output terminal of the power supply circuit, i.e., the P + terminal in fig. 5, and the source thereof is connected to the positive electrode of the first battery pack, and the source of the second switching transistor M2 is the negative output terminal of the power supply circuit, i.e., the P-terminal in fig. 5, and the source thereof is connected to the negative electrode of the second battery pack.
It should be noted that, in fig. 5, the VCH terminal of the control chip 12 can clamp the gate voltages of the third switching transistor M3 and the fourth switching transistor M4, so that the control chip 12 can output a voltage control signal to turn on the switching transistors. BS is a voltage conversion circuit inside the control chip 12, and can clamp the gate voltage of the first switching tube M1 in the same way.
As a preferred embodiment, the control circuit 1 is specifically configured to control the first switching tube M1 and the second switching tube M2 to be turned on, and when the third switching tube M3 and the fourth switching tube M4 are turned off, the voltage value output by the power supply circuit is the sum of the rated voltage of the first battery pack and the rated voltage of the second battery pack; the first switching tube M1 and the second switching tube M2 are controlled to be switched off, and the voltage value output by the power supply circuit is enabled to be zero when the third switching tube M3 and the fourth switching tube M4 are switched on; the first switching tube M1 and the fourth switching tube M4 are controlled to be closed, and when the second switching tube M2 and the third switching tube M3 are opened, the voltage value output by the power supply circuit is the rated voltage of the first battery pack; the first switching tube M1 and the fourth switching tube M4 are controlled to be switched off, and when the second switching tube M2 and the third switching tube M3 are switched on, the voltage value output by the power supply circuit is the rated voltage of the second battery pack.
Referring to fig. 6, fig. 6 is a schematic diagram of voltage values that can be output by the first battery pack and the second battery pack according to the present invention. In the embodiment, how to control the on and off of each switching tube is provided, so that the output of the first battery pack and/or the second battery pack is controlled, and the operation of a user is facilitated.
V in FIG. 6BAT1Is the rated voltage, V, of the first battery packBAT2Is the rated voltage of the second battery pack. V due to the service life of the battery or user settings, etcBAT1And VBAT2May not be equal.
As a preferred embodiment, each switch Transistor is a MOS Transistor (Metal-Oxide-Semiconductor Field-Effect Transistor).
Each switching tube in this embodiment is an MOS tube, which not only can control whether the battery pack 3 is output, but also has the characteristics of simple operation and low cost.
Of course, the present application does not limit each switching tube to be only an MOS tube, and it is sufficient to control whether the battery pack 3 outputs or not.
As a preferred embodiment, each battery data acquisition end of the control circuit 1 is connected with each battery pack 3 in a one-to-one correspondence manner;
the control circuit 1 is further configured to collect data information of each battery pack 3, determine whether the battery pack 3 fails according to the data information, and control on and off of the switch circuit 2 when it is determined that the battery pack 3 fails, so that the failed battery pack 3 stops outputting.
In this embodiment, data information of the battery pack 3 is collected, so that whether the battery pack 3 has a fault or not is determined according to the data information, for example, whether the temperature of the battery pack 3 is too high, whether the voltage is too high, and whether a fault such as leakage current occurs or not is determined. When it is determined that the battery pack 3 has a fault, only the battery pack 3 with the fault is short-circuited, that is, the battery pack 3 with the fault cannot be output, and other battery packs 3 without the fault can still be normally output, so that normal power supply of the power supply circuit is ensured.
In a preferred embodiment, each battery pack 3 includes one battery or a plurality of batteries connected in series.
Referring to fig. 7, fig. 7 is a schematic diagram illustrating connection of a battery in a battery pack according to the present invention. In this embodiment, one battery or a plurality of batteries connected in series is disposed in the battery pack 3, so that the battery pack 3 can output its rated voltage, wherein the number of the battery in each battery pack 3 may be the same or different, and the present application does not limit this.
Of course, in the present application, the positive electrode of the battery not connected to the negative electrode of the other battery in each battery pack 3 is the positive electrode of the battery pack 3, and the negative electrode of the battery not connected to the positive electrode of the other battery is the negative electrode of the battery pack 3.
As a preferred embodiment, the control circuit 1 includes a processor 11 and X control chips 12; x is an integer greater than 0 and less than N;
the information interaction ends of the control chips 12 are sequentially connected, and the processor 11 is connected with the information interaction end of any one of the control chips 12;
the processor 11 is used for determining the M battery packs 3 to be operated based on the expected voltage value and the rated voltage values of the N battery packs 3 and generating control signals;
each control chip 12 is configured to control the switch circuit 2 based on the control signal, so that the determined M battery packs 3 output desired voltage values through the switch circuit 2; m is an integer of not less than 1 and not more than N.
Referring to fig. 8, fig. 8 is a schematic structural diagram of a power supply circuit provided with a plurality of control chips according to the present invention, in this embodiment, a processor 11 and a plurality of control chips 12 may be provided, and N battery packs 3 are respectively controlled by X control chips 12, so as to improve the control speed and the control efficiency.
In addition, the information interaction ends of the control chips 12 are sequentially connected, please refer to fig. 8, and fig. 8 is a specific schematic structural diagram of another power supply circuit provided by the present invention, the processor 11 may be connected to any one of the control chips 12, after the processor 11 sends the control signal corresponding to the desired voltage value to the control chip 12 connected to itself, the control chip 12 may send the control signal to each of the control chips 12, so that each of the control chips 12 controls the switch circuit 2 based on the control signal, so that the voltages output by the N battery packs 3 are the desired voltage value.
It should be noted that fig. 8 only provides an example of connecting two battery packs 3 to each control chip 12, but the number of battery packs 3 connected to each control chip 12 is not limited in practical application.
Further, the processor 11 may be, but is not limited to, an MCU (micro controller Unit).
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 identical elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (8)

1. A power supply circuit is characterized by comprising a control circuit, a switch circuit and N battery packs; the N battery packs are sequentially connected in series; the control end of the switch circuit is connected with the control end of the control circuit, the switch circuit is arranged between the N battery packs and external equipment, and the switch circuit is connected with the anodes and the cathodes of the N battery packs; n is an integer not less than 1;
the control circuit is used for determining M battery packs to be operated based on expected voltage values and rated voltage values of the N battery packs, and controlling the switch circuit to enable the determined M battery packs to output the expected voltage values through the switch circuit; m is an integer of not less than 1 and not more than N.
2. The power supply circuit of claim 1 wherein said switching circuit comprises a plurality of switching tubes; the control ends of the switch tubes are respectively connected with the control ends of the control circuit in a one-to-one correspondence manner;
the first end of the first switch tube is connected with the first end of the external equipment, and the second end of the first switch tube is connected with the head end of the battery pack connected in series; the first end of the second switch tube is connected with the tail ends of the battery packs connected in series, the second end of the second switch tube is connected with the second end of the external equipment, and two ends of each battery pack are connected with one switch tube in parallel;
the control circuit is specifically used for determining M battery packs needing to output voltage based on an expected voltage value and the rated voltage values of the N battery packs, and controlling the on and off of each switch tube in the switch circuit so that the determined M battery packs output the expected voltage value through the switch circuit; m is an integer of not less than 1 and not more than N.
3. The power supply circuit of claim 2 wherein said battery pack comprises a first battery pack and a second battery pack, a second end of said first battery pack being connected to a first end of said second battery pack; the switching circuit comprises a first switching tube, a second switching tube, a third switching tube and a fourth switching tube;
the first end of the first switch tube is connected with the first end of the external equipment, the second end of the first switch tube is connected with the first end of the first battery pack, and the control end of the first switch tube is connected with the first control end of the control circuit;
the first end of the second switch tube is connected with the second end of the second battery pack, the second end of the second switch tube is connected with the second end of the external equipment, and the control end of the second switch tube is connected with the second control end of the control circuit;
the first end of the third switching tube is connected with the first end of the external equipment, the second end of the third switching tube is connected with the second end of the first battery pack and the voltage clamping end of the control circuit, and the control end of the third switching tube is connected with the third control end of the control circuit;
the first end of the fourth switch tube is connected with the second end of the second switch tube, the second end of the fourth switch tube is connected with the second end of the second battery pack and the second end of the external device, and the control end of the fourth switch tube is connected with the fourth control end of the control circuit.
4. The power supply circuit according to claim 3, wherein the control circuit is specifically configured to control the first switching tube and the second switching tube to be turned on, and when the third switching tube and the fourth switching tube are turned off, the voltage value output by the power supply circuit is the sum of the rated voltage of the first battery pack and the rated voltage of the second battery pack; the first switching tube and the second switching tube are controlled to be disconnected, and when the third switching tube and the fourth switching tube are closed, the voltage value output by the power supply circuit is zero; controlling the first switching tube and the fourth switching tube to be closed, and enabling the voltage value output by the power supply circuit to be the rated voltage of the first battery pack when the second switching tube and the third switching tube are disconnected; and controlling the first switching tube and the fourth switching tube to be disconnected, and enabling the voltage value output by the power supply circuit to be the rated voltage of the second battery pack when the second switching tube and the third switching tube are closed.
5. The power supply circuit of claim 2 wherein each of said switching transistors is a metal-oxide semiconductor field effect transistor (MOS) transistor.
6. The power supply circuit according to claim 1, wherein each battery data acquisition end of the control circuit is connected with each battery pack in a one-to-one correspondence;
the control circuit is further used for acquiring data information of each battery pack, judging whether the battery pack has a fault according to the data information, and controlling the on-off of the switch circuit when the battery pack is judged to have the fault so as to stop outputting the battery pack with the fault.
7. The power supply circuit according to claim 1, wherein each of the battery packs comprises one battery or a plurality of batteries connected in series in sequence.
8. The power supply circuit of any one of claims 1-7 wherein the control circuit comprises a processor and X control chips; x is an integer greater than 0 and less than N;
the information interaction ends of the control chips are sequentially connected, and the processor is connected with the information interaction end of any one of the control chips;
the processor is used for determining M battery packs to be operated based on the expected voltage value and the rated voltage values of the N battery packs and generating control signals;
each control chip is used for controlling the switch circuit based on the control signal so as to enable the determined M battery packs to output the expected voltage value through the switch circuit; m is an integer of not less than 1 and not more than N.
CN202110639160.0A 2021-06-08 2021-06-08 Power supply circuit Pending CN113315205A (en)

Priority Applications (1)

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CN202110639160.0A CN113315205A (en) 2021-06-08 2021-06-08 Power supply circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110639160.0A CN113315205A (en) 2021-06-08 2021-06-08 Power supply circuit

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CN113315205A true CN113315205A (en) 2021-08-27

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CN202110639160.0A Pending CN113315205A (en) 2021-06-08 2021-06-08 Power supply circuit

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