Battery on / off circuit, circuit control method, power supply circuit and electronic device

Abstract

Disclosed in the present application are a battery on / off circuit, a circuit control method, a power supply circuit and an electronic device. The battery on / off circuit comprises an external connecting assembly, a battery connecting assembly and a switching circuit, wherein the external connecting assembly is used for connecting a load circuit; the battery connecting assembly is used for connecting a battery; and the switching circuit is separately connected to the external connecting assembly and the battery connecting assembly, and is used for controlling the external connecting assembly and the battery connecting assembly to be in a disconnected state, so that the external connecting assembly and the load circuit form a first circuit, or, controlling the external connecting assembly and the battery connecting assembly to be in a connected state, so that the battery and the load circuit form a second circuit. In this way, the present application can realize independent control over whether a battery is connected to a circuit for power supply.

Description

Battery on-off circuit, circuit control method, power supply circuit and electronic equipment

[0001]

Cross-reference

[0002] This application claims priority to the Chinese patent application filed with the China Patent Office on November 28, 2023, with application number 2023116180997 and application name “Battery on-off circuit, circuit control method, power supply circuit and electronic device”, the entire contents of which are incorporated by reference in this application.

Technical field

[0003] The present application relates to the field of battery technology, and in particular to a battery on-off circuit, a circuit control method, a power supply circuit, and an electronic device. [Background Technology]

[0004] As living standards improve, people are increasingly using various batteries in their daily lives. Battery management is crucial for devices equipped with batteries. While most battery management systems can collect battery data, they cannot disconnect battery packs, let alone individual batteries. For example, a single battery failure could render the entire battery pack inoperable.

[0005] [Summary of the invention]

[0006] The present application at least provides a battery on-off circuit, a circuit control method, a power supply circuit and an electronic device.

[0007] The present application provides a battery on-off circuit, including: an external connection component, a battery connection component, and a switching circuit, wherein the external connection component is used to connect to a load circuit; the battery connection component is used to connect to a battery; the switching circuit is respectively connected to the external connection component and the battery connection component, and is used to control the external connection component and the battery connection component to be in a disconnected state, and the external connection component and the load circuit form a first loop; or, control the external connection component and the battery connection component to be in a connected state, so that the battery and the load circuit form a second loop.

[0008] In the above scheme, the switching circuit cooperates with the external connection component connected to the load circuit and the battery connection component connected to the battery to control the battery and the load circuit to form a loop, or the battery can be removed from the load circuit without affecting the load circuit, thereby enabling independent control of whether the battery is connected to the loop for power supply.

[0009] In some embodiments, the external connection component includes a first external connection terminal and a second external connection terminal for respectively connecting the two power access terminals of the load circuit, and the switching circuit is used to control the formation of a path between the first external connection terminal and the second external connection terminal, so that the first external connection terminal and the second external connection terminal form a first loop with the load circuit; the battery connection component includes a first battery connection terminal and a second battery connection terminal for respectively connecting the positive and negative poles of the battery, and the switching circuit is used to control the formation of a path between the first external connection terminal and the first battery connection terminal, and the formation of a path between the second external connection terminal and the second battery connection terminal, so that the battery and the load circuit form a second loop.

[0010] In the above scheme, the first external connection terminal and the second external connection terminal can be directly connected through the control of the switching circuit, so that the battery is not in the loop of the load circuit without affecting the load circuit, and the formation of a path between the first external connection terminal and the first battery connection terminal and the formation of a path between the second external connection terminal and the second battery connection terminal can enable the battery to be connected in series to the loop for power supply, thereby realizing independent control of whether the battery is connected to the loop for power supply.

[0011] In some embodiments, the switching circuit includes a first switching subcircuit and a second switching subcircuit, the first switching subcircuit being connected to an external connection component and being used to control the external connection component and the load circuit to be conductive in response to a first control signal to form a first loop; the second switching subcircuit being respectively connected to the external connection component and the battery connection component and being used to control the external connection component and the battery connection component to be conductive in response to a second control signal to form a second loop.

[0012] In the above solution, the first control signal and the second control signal are used to control the first switch subcircuit and the second switch subcircuit respectively, and to control the formation of the first loop and the second loop respectively, so as to realize independent control of whether the battery is connected to the loop for power supply.

[0013] In some embodiments, the external connection component includes a first external connection terminal and a second external connection terminal for respectively connecting two power access terminals of the load circuit, and the battery connection component includes a first battery connection terminal and a second battery connection terminal for respectively connecting the positive and negative poles of the battery; the switching circuit includes: a first switching sub-circuit and a second switching sub-circuit, the first switching sub-circuit is respectively connected to the first external connection terminal and the second external connection terminal, and is used to respond to a first control signal to form a path between the first external connection terminal and the second external connection terminal; the second switching sub-circuit is respectively connected to the first external connection terminal, the second external connection terminal, the first battery connection terminal and the second battery connection terminal, and is used to respond to a second control signal to form a path between the first external connection terminal and the first battery connection terminal, and between the second external connection terminal and the second battery connection terminal.

[0014] In the above scheme, the first switch subcircuit and the second switch subcircuit respectively control the formation of a path between the first external connection terminal and the second external connection terminal, the first external connection terminal and the first battery connection terminal, and the conduction between the second external connection terminal and the second battery connection terminal, thereby enabling independent control of whether the battery is connected to the circuit for power supply.

[0015] In some embodiments, the external connection component includes a first external connection terminal and a second external connection terminal for respectively connecting two power access terminals of the load circuit, the first switch sub-circuit includes a first switch tube, the first connection terminal of the first switch tube is connected to the first external connection terminal, and the second connection terminal of the first switch tube is connected to the second external connection terminal. The control input terminal of the first switch tube serves as the control input terminal of the first switch sub-circuit, and is used to receive a third control signal to control the on and off between the first external connection terminal and the second external connection terminal. The third control signal is the first control signal or is generated based on the first control signal.

[0016] In the above solution, the first switch tube is used as the control element, which can realize the control of the on-off between the first external connection terminal and the second external connection terminal according to the received control signal, so as to form a first loop.

[0017] In some embodiments, the switching circuit also includes a first generating subcircuit, the external input end of the first generating subcircuit is used to receive a first control signal input from the outside, the output end of the first generating subcircuit is connected to the control input end of the first switching subcircuit, and the first generating subcircuit is used to generate a third control signal based on the first control signal and output it to the first switching subcircuit.

[0018] In the above solution, the first generating sub-circuit can modulate the external control signal to control the first switching sub-circuit, and the cost of the switching circuit can be reduced through two-stage control.

[0019] In some embodiments, the first generating subcircuit includes a first resistor, a second resistor, a second switching tube, a third resistor, and a fourth resistor, wherein the control input end of the second switching tube is connected in series with the first resistor and the second resistor and then grounded, the first resistor is connected to one end of the second resistor as an external input end for receiving a first control signal, the first connection end of the second switching tube is connected in series with the third resistor and the fourth resistor and then connected to the first connection end of the first switching subcircuit, the first connection end of the first switching subcircuit is connected to the first external connection end, and the third resistor is connected to one end of the fourth resistor and connected to the control input end of the first switching subcircuit.

[0020] In the above solution, the first generating sub-circuit is formed by the second switch tube and the first resistor, the second resistor, the third resistor, and the fourth resistor, and can generate the third control signal in response to the first control signal, thereby realizing two-stage control.

[0021] In some embodiments, the first generating sub-circuit further includes a first diode, and two ends of the first diode are respectively connected to the control input terminal and the first connection terminal of the first switching sub-circuit.

[0022] In the above solution, the first diode can serve as a protection circuit to improve circuit safety.

[0023] In some embodiments, the external connection component includes a first external connection terminal and a second external connection terminal for respectively connecting the two power access terminals of the load circuit, and the battery connection component includes a first battery connection terminal and a second battery connection terminal for respectively connecting the positive and negative poles of the battery; the first external connection terminal is connected to the first battery connection terminal; the number of the second switch sub-circuit is at least one group, wherein each group of the second switch sub-circuit includes a third switch tube and a fifth resistor, the first connection terminal of the third switch tube is connected to the second external connection terminal, and the second connection terminal of the third switch tube is connected to the second battery connection terminal through the fifth resistor, and the control input terminal of the third switch tube is used to receive a fourth control signal to control the on and off between the second external connection terminal and the second battery connection terminal, and the fourth control signal is the second control signal or is generated based on the second control signal.

[0024] In the above solution, the third switch tube and the fifth resistor are used as control elements, which can realize the control of the on-off between the second external connection terminal and the second battery connection terminal according to the received control signal. When the first external connection terminal is connected to the first battery connection terminal, the formation of the second loop can be controlled.

[0025] In some embodiments, a first end of the fifth resistor is connected to the second connection end of the third switch tube, and a second end of the fifth resistor and the second battery connection end are both grounded.

[0026] In the above solution, the second connection terminal of the third switch tube can be connected to the second battery connection terminal through the fifth resistor in a common ground manner to form a second loop.

[0027] In some embodiments, the first connection terminals of the third switch transistors in all the second switch sub-circuits are connected, and the control input terminals of the third switch transistors in all the second switch sub-circuits are connected.

[0028] In the above solution, it is possible to achieve that multiple groups of second switch sub-circuits are subject to the same control and have the same conduction state.

[0029] In some embodiments, the switching circuit also includes a second generating sub-circuit, the external input end of the second generating sub-circuit is used to receive a second control signal input from the outside, the output end of the second generating sub-circuit is connected to the control input end of the second switching sub-circuit, and the second generating sub-circuit is used to generate a fourth control signal based on the second control signal and output it to the second switching sub-circuit.

[0030] In the above solution, the second generating sub-circuit can modulate the external control signal to control the second switching sub-circuit. The cost of the switching circuit can be reduced through two-stage control.

[0031] In some embodiments, the second generating sub-circuit includes a sixth resistor, a seventh resistor, a fourth switch tube, and an eighth resistor, wherein the control input end of the fourth switch tube is connected in series with the sixth resistor and the seventh resistor in sequence and then grounded, the sixth resistor is connected to one end of the seventh resistor as an external input end for receiving a second control signal, the first connection end of the fourth switch tube is respectively connected to the first end of the eighth resistor and the control input end of the second switch sub-circuit, and the second end of the eighth resistor is connected to a preset power supply.

[0032] In the above solution, the second generating sub-circuit is formed by the fourth switch tube and the sixth resistor, the seventh resistor, and the eighth resistor, which can receive the second control signal and generate the fourth control signal, thereby realizing two-stage control.

[0033] In some embodiments, a protection circuit is connected between the first battery connection terminal and the second battery connection terminal.

[0034] In the above solution, the provision of a protection circuit can improve circuit safety.

[0035] In some embodiments, the protection circuit includes a second diode and a capacitor connected in series.

[0036] In the above solution, the second diode and the capacitor are provided to isolate direct current and protect the circuit.

[0037] The present application provides a circuit control method, which is applied to a battery on-off circuit as described in any of the foregoing items, the method comprising: generating a first control signal and a second control signal; inputting the first control signal and the second control signal into a switching circuit of the battery on-off circuit to control an external connection component and a battery connection component to be in a disconnected state, and the external connection component and a load circuit to form a first loop, or controlling the external connection component and the battery connection component to be in a connected state, so that the battery and the load circuit form a second loop.

[0038] In the above scheme, a first control signal and a second control signal are generated and input into the switching circuit to control the switching status of the switching circuit, thereby controlling the battery and the load circuit to form a loop, or, without affecting the load loop, eliminating the battery from the loop of the load circuit, thereby enabling independent control of whether the battery connected to the battery on-off circuit is connected to the loop for power supply.

[0039] In some embodiments, the switch circuit includes a first switch subcircuit and a second switch subcircuit; the switch circuit that inputs the first control signal and the second control signal into the battery on-off circuit includes: inputting the first control signal into the first switch subcircuit and inputting the second control signal into the second switch subcircuit.

[0040] In the above scheme, the switching circuit includes a first switching sub-circuit and a second switching sub-circuit, and the first control signal and the second control signal respectively control the first switching sub-circuit and the second switching sub-circuit to control the battery and the load circuit to form a loop, or to eliminate the battery from the loop of the load circuit without affecting the load loop.

[0041] In some embodiments, generating the first control signal and the second control signal includes: in response to the battery not needing to be connected to the load circuit, setting the first control signal and the second control signal to a first level combination; or, generating the first control signal and the second control signal includes: in response to the battery needing to be connected to the load circuit, setting the first control signal and the second control signal to a second level combination.

[0042] In the above solution, whether the battery is connected to the load circuit is controlled by setting the control signal to a first level combination and a second level combination.

[0043] In some embodiments, the first level combination is that the first control signal and the second control signal are both first level signals, and the second level combination is that the first control signal and the second control signal are both second level signals, and the first level signal and the second level signal are different.

[0044] In the above scheme, when the first control signal and the second control signal are both first level signals, the control battery is not connected to the load circuit. When the first control signal and the second control signal are both second level signals, the control battery is connected to the load circuit, so as to realize the independent control of whether the battery connected to the battery on-off circuit is connected to the loop for power supply.

[0045] In some embodiments, before setting the first control signal and the second control signal to the first level combination or the second level combination, it also includes: setting the first control signal and the second control signal to a third level combination to control the external connection component and the battery connection component to be in a disconnected state, and the external connection component and the load circuit to be in a disconnected state; when the external connection component and the battery connection component are in a disconnected state, and the external connection component and the load circuit are in a disconnected state, performing the step of setting the first control signal and the second control signal to the first level combination or the second level combination.

[0046] In the above solution, before setting the first level combination or the second level combination, the third level combination is set first, so that the circuit switches from the disconnected state to the state where the battery supplies power to the load circuit or does not supply power, avoiding other states and improving circuit safety.

[0047] In some embodiments, the third level combination is that the first control signal is a second level signal, the second control signal is a first level signal, and the first level signal and the second level signal are different.

[0048] In the above scheme, the first control signal is a second level signal. When the second control signal is a first level signal, the external connection component and the battery connection component are in a disconnected state, as well as the external connection component and the load circuit are in a disconnected state, thereby keeping the circuit in a disconnected state.

[0049] The present application provides a power supply circuit, which supplies power to a load. The power supply circuit includes at least one group of battery circuits connected in series, wherein each group of battery circuits includes: a battery and any one of the aforementioned battery on-off circuits, a battery connecting component of the battery on-off circuit is connected to the battery, and an external connecting component of the battery on-off circuit is connected to other battery circuits and / or is used to connect to the load.

[0050] In the above scheme, the power supply circuit includes at least one group of battery circuits connected in series. The battery on-off circuit can be used to individually control whether each battery in the series battery circuit is connected to the circuit. When the battery is not connected to the circuit, it will not affect the normal operation of the circuit, thereby realizing the decoupling of each battery.

[0051] In some embodiments, the power supply circuit also includes a control module for generating a first control signal and a second control signal; inputting the first control signal and the second control signal into the switching circuit of the battery on-off circuit to control the external connection component and the battery connection component to be in a disconnected state, and the external connection component and the load circuit to form a first loop, or controlling the external connection component and the battery connection component to be in a connected state, so that the battery and the load circuit form a second loop.

[0052] In the above solution, the power supply circuit can generate a control signal by itself to control the switch circuit, thereby realizing independent control of whether the battery is connected to the loop for power supply.

[0053] The present application provides an electronic device, which includes at least one target load and a power supply circuit, wherein the power supply circuit is connected to the at least one target load to supply power to the at least one target load, and the power supply circuit is the aforementioned power supply circuit.

[0054] In the above solution, a power supply circuit capable of decoupling a single battery is used to power the target load, and a single battery can be decoupled individually, reducing the possibility of a single battery abnormality affecting the overall power supply and improving the flexibility of the power supply of the electronic device.

[0055] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application.

Brief Description of the Drawings

[0056] The drawings herein are incorporated into and constitute a part of the specification. These drawings illustrate embodiments consistent with the present application and, together with the specification, are used to illustrate the technical solutions of the present application.

[0057] FIG1 is a first schematic diagram of a battery on-off circuit provided by some embodiments of the present application;

[0058] FIG2 is a second schematic diagram of a battery on-off circuit provided in some embodiments of the present application;

[0059] FIG3 is a third schematic diagram of a battery on-off circuit provided in some embodiments of the present application;

[0060] FIG4 is a fourth schematic diagram of a battery on-off circuit provided in some embodiments of the present application;

[0061] FIG5 is a fifth schematic diagram of a battery on-off circuit provided in some embodiments of the present application;

[0062] FIG6 is a flow chart of a circuit control method provided in some embodiments of the present application;

[0063] FIG7 is another flow chart of a circuit control method provided by some embodiments of the present application;

[0064] FIG8 is a schematic diagram of a power supply circuit provided in some embodiments of the present application;

[0065] FIG9 is a schematic diagram of an electronic device provided in some embodiments of the present application. [Specific implementation method]

[0066] The following will describe in detail the embodiments of the technical solution of the present application in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only used as examples and cannot be used to limit the scope of protection of the present application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of the present application; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "including" and "having" in the specification and claims of the present application and the above-mentioned description of the drawings and any variations thereof are intended to cover non-exclusive inclusions.

[0067] In the description of the embodiments of the present application, the technical terms "first" and "second" are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined. Mentioning "embodiment" in this article means that the specific features, structures or characteristics described in conjunction with the embodiment can be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments. In the description of the embodiments of the present application, the term "and / or" is merely a description of the association relationship of associated objects, indicating that three relationships can exist, for example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0068] The applicant has discovered that some battery management systems are unable to disconnect series-connected battery packs, let alone individual batteries. For example, a single battery failure could render the entire battery pack inoperable, impacting device operation. Therefore, the present application proposes the following battery on / off circuit, which, compared to existing technologies, can be connected to batteries to individually control whether a battery is connected to the circuit for power supply.

[0069] Please refer to FIG1 , which is a first schematic diagram of a battery on-off circuit provided in some embodiments of the present application.

[0070] In this embodiment, the battery on-off circuit 10 includes an external connection component 11 , a battery connection component 12 and a switch circuit 13 .

[0071] The external connection component 11 is used to connect to the load circuit 20 , the battery connection component 12 is used to connect to the battery 30 , and the switch circuit 13 is connected to the external connection component 11 and the battery connection component 12 respectively.

[0072] The switch circuit 13 can be used to control the external connection component 11 and the battery connection component 12 to be in a disconnected state, and the external connection component 11 forms a first loop with the load circuit 20. At this time, the battery 30 does not supply power to the load circuit 20.

[0073] The switch circuit 13 can be used to control the external connection component 11 and the battery connection component 12 to be in a connected state, so that the battery 30 and the load circuit 20 form a second loop. At this time, the battery 30 can supply power to the load circuit 20.

[0074] In some embodiments, when only the above-mentioned battery 30 can supply power to the load circuit 20, the switch circuit 13 can control the external connection component 11 and the battery connection component 12 to be in a disconnected state, and the external connection component 11 and the load circuit 20 form a first loop, and the load circuit 20 does not work at this time.

[0075] In some embodiments, other power sources besides the battery 30 may be present. When the battery 30 does not supply power to the load circuit 20, the other power source may provide power. For example, if the load circuit 20 includes other power sources and a powered device, the other power source may provide power to the powered device. When the battery 30 and the load circuit 20 form a second circuit, the battery 30 and the other power source may provide power together.

[0076] In the above scheme, the switching circuit 13 cooperates with the external connection component 11 connected to the load circuit 20 and the battery connection component 12 connected to the battery 30 to control the battery 30 and the load circuit 20 to form a second circuit, or, without affecting the first circuit, the battery 30 is removed from the first circuit, so that it is possible to independently control whether the battery 30 is connected to the circuit for power supply.

[0077] In some embodiments, the switch circuit 13 may also control the external connection component 11 and the load circuit 20 to be in a disconnected state.

[0078] Please refer to FIG. 2 , which is a second schematic diagram of a battery on-off circuit provided in some embodiments of the present application.

[0079] In this embodiment, the battery on / off circuit 10 includes an external connection component 11, a battery connection component 12, and a switch circuit 13. The switch circuit 13 connects the external connection component 11 and the battery connection component 12, respectively. The external connection component 11 is used to connect to a load circuit 20. The load circuit 20 includes two power supply terminals. The external connection component 11 includes a first external connection terminal 111 and a second external connection terminal 112 for connecting to the two power supply terminals, respectively.

[0080] The battery connection assembly 12 is used to connect the battery 30 . The battery connection assembly 12 includes a first battery connection terminal 121 and a second battery connection terminal 122 for connecting the positive electrode and the negative electrode of the battery 30 respectively.

[0081] The switch circuit 13 can be used to control the connection between the external connection component 11 and the battery connection component 12, so that the battery 30 and the load circuit 20 form a second circuit. Specifically, the switch circuit 13 can be used to control the formation of a path between the first external connection terminal 111 and the first battery connection terminal 121, and the formation of a path between the second external connection terminal 112 and the second battery connection terminal 122, so that the battery 30 and the load circuit 20 form a second circuit.

[0082] The switch circuit 13 can be used to control the external connection component 11 and the battery connection component 12 to be in a disconnected state, and the external connection component 11 and the load circuit 20 form a first loop.

[0083] Specifically, to maintain a connected state between the external connection assembly 11 and the battery connection assembly 12, a path must be formed between the first external connection terminal 111 and the first battery connection terminal 121, and a path must be formed between the second external connection terminal 112 and the second battery connection terminal 122. To maintain a disconnected state between the external connection assembly 11 and the battery connection assembly 12, the switch circuit 13 can be used to disconnect the first external connection terminal 111 from the first battery connection terminal 121, and / or the second external connection terminal 112 from the second battery connection terminal 122.

[0084] In this embodiment, description is made by taking the example of the switch circuit 13 controlling the disconnection between the second external connection terminal 112 and the second battery connection terminal 122 .

[0085] Specifically, the switch circuit 13 may be used to control the formation of a path between the first external connection terminal 111 and the second external connection terminal 112 , so that the first external connection terminal 111 and the second external connection terminal 112 and the load circuit 20 form a first loop.

[0086] In the above scheme, the first external connection terminal 111 and the second external connection terminal 112 can be directly connected through the control of the switch circuit 13, so that the battery 30 is not in the first circuit without affecting the first circuit, and the formation of a path between the first external connection terminal 111 and the first battery connection terminal 121 and the formation of a path between the second external connection terminal 112 and the second battery connection terminal 122 can enable the battery 30 to be connected in series to the circuit for power supply, and it is possible to independently control whether the battery 30 is connected to the circuit for power supply.

[0087] Please refer to FIG3 , which is a third schematic diagram of a battery on-off circuit provided in some embodiments of the present application.

[0088] In this embodiment, the switch circuit 13 includes a first switch subcircuit 131 and a second switch subcircuit 132. The aforementioned control situation can be achieved by controlling the first switch subcircuit 131 and the second switch subcircuit 132, and two different control signals can be used to control different subcircuits respectively.

[0089] The first switch sub-circuit 131 is connected to the external connection component 11 and is used to control the external connection component 11 and the load circuit 20 to be connected in response to a first control signal to form a first loop.

[0090] The second switch sub-circuit 132 is connected to the external connection component 11 and the battery connection component 12 respectively, and is used to control the external connection component 11 and the battery connection component 12 to be conductive in response to a second control signal to form a second loop.

[0091] In some cases, the second switch sub-circuit 132 can be used to control the external connection component 11 and the battery connection component 12 to be in a disconnected state in response to the second control signal.

[0092] In some cases, the first switch subcircuit 131 can control the external connection component 11 and the load circuit 20 to be in a disconnected state in response to the first control signal. Of course, in some embodiments, the above control situations can also be implemented using the same circuit and a corresponding control signal.

[0093] Specifically, the external connection assembly 11 includes a first external connection terminal 111 and a second external connection terminal 112 for connecting to two power input terminals, respectively. The battery connection assembly 12 is used to connect to the battery 30 and includes a first battery connection terminal 121 and a second battery connection terminal 122 for connecting to the positive and negative poles of the battery 30, respectively.

[0094] The first switch sub-circuit 131 is respectively connected to the first external connection terminal 111 and the second external connection terminal 112, and can be used to respond to a first control signal to form a path between the first external connection terminal 111 and the second external connection terminal 112, so that the first external connection terminal 111 and the second external connection terminal 112 form a second loop with the load circuit 20.

[0095] The second switch sub-circuit 132 is respectively connected to the first external connection terminal 111, the second external connection terminal 112, the first battery connection terminal 121 and the second battery connection terminal 122, and can be used to form a path between the first external connection terminal 111 and the first battery connection terminal 121, and a path between the second external connection terminal 112 and the second battery connection terminal 122 in response to a second control signal, so that the battery 30 and the load circuit 20 form a second loop.

[0096] The second switch subcircuit 132 can also disconnect the first external connection terminal 111 and the first battery connection terminal 121, and / or disconnect the second external connection terminal 112 and the second battery connection terminal 122 in response to the second control signal, so that the external connection component 11 and the battery connection component 12 are in a disconnected state.

[0097] Please refer to FIG. 4 , which is a fourth schematic diagram of a battery on-off circuit provided in some embodiments of the present application.

[0098] In this embodiment, the first external connection terminal 111 and the first battery connection terminal 121 remain connected, and the switch circuit 13 can control the formation of a second loop between the battery 30 and the load circuit 20 by disconnecting or connecting the second external connection terminal 112 and the second battery connection terminal 122.

[0099] Specifically, the second switch subcircuit 132 is respectively connected to the first external connection terminal 111, the second external connection terminal 112, the first battery connection terminal 121 and the second battery connection terminal 122, wherein the first external connection terminal 111 and the second external connection terminal 112 remain connected. The second switch subcircuit 132 can be used to respond to the second control signal to form a path between the second external connection terminal 112 and the second battery connection terminal 122, so that the battery 30 and the load circuit 20 form a second loop.

[0100] The first control signal and the second control signal may be level signals and may be generated by an analog circuit or a digital circuit. The first control signal / the second control signal may be a first level signal or a second level signal, and the first level signal and the second level signal may be different. By setting the first control signal / the second control signal to the first level signal or the second level signal, the conduction state in the circuit is controlled. Of course, the first control signal and the second control signal may be set to the first level signal or the second level signal according to actual application requirements, and the specific values ​​of the first level signal and the second level signal may also be set according to actual application requirements.

[0101] In a specific application scenario, the first level signal may be a high level signal, represented by 1, and the second level signal may be a low level signal, represented by 0.

[0102] Please refer to Figure 5, which is a fifth schematic diagram of a battery on-off circuit provided by some embodiments of the present application. The battery 30 and the load circuit 20 are not shown in Figure 5.

[0103] In this embodiment, the external connection assembly 11 includes a first external connection terminal 111 and a second external connection terminal 112 for connecting to two power input terminals, respectively. The first switch subcircuit 131 may be provided with a control input terminal (not shown) for receiving a control signal. The second switch subcircuit 132 may be provided with a control input terminal (not shown) for receiving a control signal.

[0104] The first switching sub-circuit 131 includes a first switching transistor 1312 having a first connection terminal a1, a second connection terminal a2, and a control input terminal a3. The first connection terminal a1 of the first switching transistor 1312 can be connected to the first external connection terminal 111, and the second connection terminal a2 of the first switching transistor 1312 can be connected to the second external connection terminal 112.

[0105] The control input terminal a3 of the first switch tube 1312 can serve as the control input terminal of the first switch sub-circuit 131, and is used to receive a third control signal to control the on / off between the first external connection terminal 111 and the second external connection terminal 112, wherein the third control signal can be the first control signal or a signal generated based on the first control signal.

[0106] As shown in Figure 5, in a specific application scenario, a P-type switch tube can be used as the first switch tube 1312, wherein the source of the P-type switch tube can be used as the first connection terminal a1 of the first switch tube 1312, the drain can be used as the second connection terminal a2 of the first switch tube 1312, and the gate can be used as the control input terminal a3 of the first switch tube 1312.

[0107] It should be noted that when the first control signal and the second control signal are used to control the first switch sub-circuit 131 and the second switch sub-circuit 132, respectively, the first control signal / the second control signal can be used directly or indirectly to control the first switch sub-circuit 131 / the second switch sub-circuit 132. Indirect control can mean inputting a control signal generated based on the first control signal / the second control signal into the first switch sub-circuit 131 / the second switch sub-circuit 132 for control.

[0108] In some embodiments, the external connection assembly 11 includes a first external connection terminal 111 and a second external connection terminal 112 for respectively connecting to two power supply input terminals. The battery connection assembly 12 is used to connect to the battery 30 and includes a first battery connection terminal 121 and a second battery connection terminal 122 for respectively connecting to the positive and negative poles of the battery 30. The number of second switch subcircuits 132 can be one or more groups. Multiple groups of second switch subcircuits 132 can share the current of the second loop. Figure 5 also shows a schematic diagram of setting up two groups of second switch subcircuits 132.

[0109] In some embodiments, the first external connection terminal 111 and the first battery connection terminal 121 remain connected, and the second switch subcircuit 132 can be used to form a path between the second external connection terminal 112 and the second battery connection terminal 122 in response to a second control signal, so that the battery 30 and the load circuit 20 form a second loop.

[0110] Specifically, each second switch sub-circuit 132 includes a third switch transistor 1322 and a fifth resistor 1323. The third switch transistor 1322 has a first connection terminal b1, a second connection terminal b2, and a control input terminal b3. The first connection terminal b1 of the third switch transistor 1322 can be connected to the second external connection terminal 112, and the second connection terminal b2 of the third switch transistor 1322 can be connected to the second battery connection terminal 122 via the fifth resistor 1323.

[0111] The control input terminal b3 of the third switch transistor 1322 can serve as the control input terminal of the second switch sub-circuit 132, and is used to receive a fourth control signal to control the connection between the second external connection terminal 112 and the second battery connection terminal 122. The fourth control signal can be the second control signal or a signal generated based on the second control signal.

[0112] As shown in Figure 5, in a specific application scenario, an N-type switch tube can be used as the third switch tube 1322, wherein the drain of the N-type switch tube can serve as the first connection terminal b1 of the third switch tube 1322, the source can serve as the second connection terminal b2 of the third switch tube 1322, and the gate can serve as the control input terminal b3 of the third switch tube 1322.

[0113] It should be noted that the fifth resistor 1323 may be connected to the second battery connection terminal 122 via a common ground. Specifically, a first end of the fifth resistor 1323 is connected to the second connection terminal b2 of the third switch 1322, and a second end of the fifth resistor 1323 and the second battery connection terminal 122 are both grounded.

[0114] In the above solution, the second connection terminal b2 of the third switch tube 1322 can be connected to the second battery connection terminal 122 through the fifth resistor 1323 in a common ground manner to form a second loop.

[0115] In some embodiments, due to the presence of multiple sets of second switch sub-circuits 132, the first connection terminals b1 of the third switch transistors 1322 in all second switch sub-circuits 132 are connected, and the control input terminals b3 of the third switch transistors 1322 in all second switch sub-circuits 132 are connected. The conduction states of all second switch sub-circuits 132 are the same.

[0116] In the above solution, it is possible to achieve that multiple groups of second switch sub-circuits 132 are controlled in the same manner and have the same conduction states.

[0117] In some embodiments, the switch circuit 13 may further include a first generating sub-circuit 133 configured to generate a third control signal based on the first control signal and output the third control signal to the first switch sub-circuit 131 .

[0118] Furthermore, the first generating sub-circuit 133 is provided with an external input terminal 1331 and an output terminal 1332, wherein the external input terminal 1331 of the first generating sub-circuit 133 is used to receive a first control signal (CA in FIG5 ) input from an external source, and the output terminal 1332 of the first generating sub-circuit 133 can be connected to the control input terminal of the first switching sub-circuit 131 for outputting a third control signal to the first switching sub-circuit 131.

[0119] In the above solution, the first generating sub-circuit 133 can modulate the external control signal to control the first switching sub-circuit 131 . The cost of the switching circuit 13 can be reduced through two-stage control.

[0120] Furthermore, the first generating sub-circuit 133 may include a first resistor 1333 , a second resistor 1334 , a second switch 1335 , a third resistor 1336 , and a fourth resistor 1337 .

[0121] The second switch transistor 1335 is provided with a first connection terminal c1, a second connection terminal c2, and a control input terminal c3. The control input terminal c3 of the second switch transistor 1335 is connected in series with the first resistor 1333 and the second resistor 1334, and then to ground. The first resistor 1333 is connected to one end of the second resistor 1334, serving as the external input terminal 1331 of the first generating sub-circuit 133, for receiving the first control signal. The second connection terminal c2 of the second switch transistor 1335 is grounded. The first connection terminal c1 of the second switch transistor 1335 is connected in series with the third resistor 1336 and the fourth resistor 1337, and then to the first connection terminal of the first switch sub-circuit 131 (not shown in the figure; the first connection terminal a1 of the first switch transistor 1312 can serve as the first connection terminal of the first switch sub-circuit 131). The first connection terminal of the first switch sub-circuit 131 is the end of the first switch sub-circuit 131 that is connected to the first external connection terminal 111. One end of the third resistor 1336 connected to the fourth resistor 1337 can serve as the output end 1332 of the first generating sub-circuit 133 and be connected to the control input end of the first switching sub-circuit 131 .

[0122] As shown in Figure 5, in a specific application scenario, an N-type switch tube can be used as the second switch tube 1335, wherein the drain of the N-type switch tube can be used as the first connection terminal c1 of the second switch tube 1335, the source can be used as the second connection terminal c2 of the second switch tube 1335, and the gate can be used as the control input terminal c3 of the second switch tube 1335.

[0123] In some embodiments, the first generating sub-circuit 133 may further include a first diode 1338, with two terminals of the first diode 1338 respectively connected to the control input terminal and the first connection terminal of the first switching sub-circuit 131. Specifically, the first diode 1338 may serve as a protection circuit, with the anode of the first diode 1338 connected to the control input terminal of the first switching sub-circuit 131, and the cathode of the first diode 1338 connected to the first connection terminal of the first switching sub-circuit 131.

[0124] In some embodiments, the switch circuit 13 further includes a second generating sub-circuit 134 for generating a fourth control signal based on the second control signal and outputting the fourth control signal to the second switch sub-circuit 132 .

[0125] Furthermore, the second generating sub-circuit 134 is provided with an external input terminal 1341 and an output terminal 1342, wherein the external input terminal 1341 of the second generating sub-circuit 134 is used to receive a second control signal (CB in FIG5 ) input from the outside, and the output terminal 1342 of the second generating sub-circuit 134 can be connected to the control input terminal of the second switching sub-circuit 132 for outputting a fourth control signal to the second switching sub-circuit 132.

[0126] In the above solution, the second generating sub-circuit 134 can modulate the external control signal to control the second switching sub-circuit 132 . The cost of the switching circuit 13 can be reduced through two-stage control.

[0127] Furthermore, the second generation sub-circuit 134 may include a sixth resistor 1343, a seventh resistor 1344, a fourth switch 1345, and an eighth resistor 1346. The fourth switch 1345 is provided with a first connection terminal d1, a second connection terminal d2, and a control input terminal d3. The control input terminal d3 of the fourth switch 1345 is connected in series with the sixth resistor 1343 and the seventh resistor 1344 and then to ground. The sixth resistor 1343 is connected to one end of the seventh resistor 1344 as an external input terminal 1341 of the second generation sub-circuit 134 for receiving a second control signal. The first connection terminal d1 of the fourth switch 1345 is respectively connected to the first end of the eighth resistor 1346 and the control input terminal of the second switch sub-circuit 132, and the second end of the eighth resistor 1346 is connected to the preset power supply 40.

[0128] As shown in Figure 5, in a specific application scenario, an N-type switch tube can be used as the fourth switch tube 1345, wherein the drain of the N-type switch tube can be used as the first connection terminal d1 of the fourth switch tube 1345, the source can be used as the second connection terminal d2 of the fourth switch tube 1345, and the gate can be used as the control input terminal d3 of the fourth switch tube 1345.

[0129] Of course, in some embodiments, the preset power supply 40 may also be configured as a part of the second generating sub-circuit 134 .

[0130] In some embodiments, the aforementioned control scenarios can also be implemented by using the same circuit and a corresponding control signal. In this case, only one corresponding generating circuit can be provided to receive an external input control signal and generate a control signal.

[0131] In some embodiments, a protection circuit 14 is connected between the first battery connection terminal 121 and the second battery connection terminal 122 to achieve a DC isolation protection function.

[0132] Furthermore, the protection circuit 14 may include a second diode 141 and a capacitor 142 connected in series. Exemplarily, the anode of the second diode 141 is connected to the first battery connection terminal 121, the cathode is connected to the first end of the capacitor 142, and the second end of the capacitor 142 is connected to the second battery connection terminal 122.

[0133] In a specific application scenario, the state of the switch tube can be controlled by the first and second control signals to bypass the battery 30 connected to the battery on / off circuit 10, that is, disconnecting the battery from the load circuit 20 without affecting the operation of the load circuit 20. Alternatively, the battery 30 can be connected to the load circuit 20 for power supply. The first and second control signals are level signals, which can be generated by analog or digital circuits. The switch circuit 13 is controlled by controlling changes in the level signals.

[0134] To be more specific, it can be set as a high level signal and a low level signal, represented by 1 and 0 respectively. The specific control logic is as follows:

[0135] The normal operation of the main circuit means that the battery 30 and the load circuit 20 form a second circuit, and the battery 30 supplies power to the load circuit 20 .

[0136] More specifically, the battery 30 , the second battery connection terminal 122 , the second switch sub-circuit 132 , the second external connection terminal 112 , the load circuit 20 , the first external connection terminal 111 , and the first battery connection terminal 121 form a second loop.

[0137] The bypass loop is closed, indicating that the external connection component 11 and the battery connection component 12 are disconnected, and the external connection component 11 and the load circuit 20 form a first loop. At this time, the battery 30 does not supply power to the load circuit 20 .

[0138] More specifically, the first external connection terminal 111, the first switch subcircuit 131, the second external connection terminal 112, and the load circuit 20 form a first loop. The second switch subcircuit 132 disconnects the second battery connection terminal 122 and the second external connection terminal 112.

[0139] When both the main circuit and the bypass are closed, a short circuit occurs in the circuit. Therefore, this state needs to be avoided.

[0140] More specifically, the first battery connection terminal 121 , the first switch 1312 , the third switch 1322 , the fifth resistor 1323 , and the first battery connection terminal 121 form a loop. Since the resistance of the fifth resistor 1323 is very small, the battery 30 can be considered as a short circuit.

[0141] If both the main circuit and the bypass are disconnected, then both the main circuit and the bypass are not working. This state can be used as a switching transition state between the main circuit working normally and the bypass circuit being closed, thereby avoiding circuit short circuit.

[0142] It should be noted that the battery on-off circuit 10 provided in this embodiment only needs to provide two IOs as the first control signal and the second control signal, and can match any communication standard, such as wireless communication, wired communication, etc.

[0143] In a specific application scenario, the battery on-off circuit 10 can be connected to the positive electrode of the battery 30 in the form of welding.

[0144] Each switch tube may be provided with a corresponding body diode, and the regular size of each switch tube may be adjusted according to the current size in the circuit.

[0145] Please refer to FIG. 6 , which is a flow chart of a circuit control method provided in some embodiments of the present application.

[0146] The circuit control method provided in the embodiments of the present application can be applied to any battery on-off circuit as described above. Specifically, the method may include:

[0147] Step S610: Generate a first control signal and a second control signal.

[0148] In this embodiment, the switch circuit is controlled by using two control signals as an example, wherein the two control signals are a first control signal and a second control signal, which can be generated by an analog circuit or a digital circuit.

[0149] Step S620: inputting the first control signal and the second control signal into the switch circuit of the battery on-off circuit.

[0150] The switch circuit is controlled by inputting a first control signal and a second control signal into the switch circuit to disconnect the external connection component from the battery connection component, thereby forming a first circuit with the external connection component and the load circuit. Alternatively, the external connection component and the battery connection component are connected, thereby forming a second circuit with the load circuit.

[0151] In the above solution, a first control signal and a second control signal are generated and input into the switch circuit to control whether a battery is connected to the loop of the load circuit, thereby enabling independent control of whether the battery is connected to the loop for power supply.

[0152] In some embodiments, the switch circuit includes a first switch subcircuit and a second switch subcircuit. Step S620 may include inputting a first control signal into the first switch subcircuit and inputting a second control signal into the second switch subcircuit. The two control signals are used to control the two switch subcircuits, respectively, thereby controlling the conduction state between the external connection component and the battery connection component, and the conduction state between the external connection component and the load circuit.

[0153] Specifically, a first control signal is input into the first switch subcircuit to control the conduction state between the external connection component and the load circuit; and a second control signal is input into the second switch subcircuit to control the conduction state between the external connection component and the battery connection component.

[0154] Please refer to FIG7 , which is another flow chart of a circuit control method provided in some embodiments of the present application. Specifically, the method may include the following steps:

[0155] Step S711: in response to the battery not needing to be connected to the load circuit, setting the first control signal and the second control signal to a first level combination.

[0156] Steps S711 and S712 may refer to the description of step S610 in the aforementioned embodiment. The first control signal and the second control signal may be level signals, and the first level combination is a level signal combination that controls the battery to be disconnected from the load circuit. The first control signal and the second control signal are set to the first level combination so that the battery is disconnected from the load circuit and does not power the load circuit.

[0157] Specifically, the first level combination is input to the switch circuit to control the external connection component and the battery connection component to be in a disconnected state, and the external connection component and the load circuit form a first loop.

[0158] The first level combination can be set according to actual needs.

[0159] Step S712: In response to the battery needing to be connected to the load circuit, the first control signal and the second control signal are set to a second level combination.

[0160] The first control signal and the second control signal may be level signals, and the second level signal is a level signal combination for controlling the battery to be connected to the load circuit. The first control signal and the second control signal are set to the second level combination so that the battery is connected to the load circuit to power the load circuit.

[0161] Specifically, the second level combination is input to the switch circuit to control the external connection component and the battery connection component to be in a connection state, so that the battery and the load circuit form a second loop.

[0162] The second level combination can be set according to actual needs.

[0163] Step S620: inputting the first control signal and the second control signal into the switch circuit of the battery on-off circuit.

[0164] This method can be applied to any of the aforementioned battery on-off circuits. For example, the first level combination can be that both the first control signal and the second control signal are first level signals. The second level combination can be that both the first control signal and the second control signal are second level signals. The first level signal and the second level signal are different.

[0165] In a specific application scenario, as shown in Figure 5, the first control signal is CA in Figure 5, and the second control signal is CB in Figure 5. The first level combination is that the first control signal and the second control signal are both high-level signals. The first control signal and the second control signal are respectively input into the first switch sub-circuit and the second switch sub-circuit to control the external connection component and the battery connection component to be disconnected. The external connection component and the load circuit form a first loop, so that the battery is not connected to the load circuit.

[0166] The second level combination is that the first control signal and the second control signal are both low-level signals. The first control signal and the second control signal are respectively input into the first switch sub-circuit and the second switch sub-circuit to control the external connection component and the battery connection component to be in a connected state, so that the battery and the load circuit form a second loop, so that the battery is connected to the load circuit.

[0167] In some embodiments, before setting the first control signal and the second control signal to the first level combination or the second level combination, the method may further include: setting the first control signal and the second control signal to a third level combination to control the external connection component and the battery connection component to be disconnected, and the external connection component and the load circuit to be disconnected. In this case, the battery on-off circuit does not form a loop with the load circuit.

[0168] The third level combination can be set according to actual needs.

[0169] It should be noted that since both the first control signal and the second control signal can be set to either the first or second level, four level combinations are possible. In addition to the aforementioned level combinations, there is also a fourth level combination, which allows for conduction between the external connection component and the battery connection component, and between the external connection component and the load circuit. In this case, the battery may short-circuit. Therefore, in the circuit control method, setting the first and second control signals to the fourth level combination should be avoided.

[0170] In some embodiments, the third level combination can be used before the battery on / off circuit is activated and needs to be adjusted to the first or second level combination. In some embodiments, it can also be used when switching between the first and second level combinations. In this case, one of the first and second level combinations is the current level combination, and the other is the level combination to be switched. The current level combination can be switched to the third level combination first, and then from the third level combination to the level combination to be switched. It should be noted that the third level combination can serve as a transition state, used for switching between battery connection and disconnection. Because components require a certain amount of time to change when the signal changes, circuit short circuits can be avoided.

[0171] Furthermore, when the external connection component and the battery connection component are disconnected, and when the external connection component and the load circuit are disconnected, the step of setting the first control signal and the second control signal to the first level combination or the second level combination is performed. This can avoid circuit short circuits and improve circuit safety.

[0172] Exemplarily, the third level combination can be one in which the first control signal is a second level signal, the second control signal is a first level signal, and the first level signal and the second level signal are different. In a specific application scenario, as shown in FIG5 , the first control signal is CA in FIG5 , and the second control signal is CB in FIG5 . The third level combination is one in which the first control signal is a low level signal and the second control signal is a high level signal. In this case, no loop is formed between the battery on-off circuit and the load circuit. The fourth level combination is one in which the first control signal is a high level signal and the second control signal is a low level signal. In this case, the battery will be short-circuited.

[0173] It should be noted that any of the aforementioned circuit control methods can be executed by a control module with processing capabilities.

[0174] In a specific application scenario, the battery on-off circuit can be as shown in Figure 5, where the first level signal is a high level signal, represented by 1, and the second level signal is a low level signal, represented by 0. Set the first control signal and the second control signal to a high level, and the battery is not connected to the loop for power supply. Set the first control signal and the second control signal to a low level, and the battery is connected to the loop for power supply. If the first control signal is set to a high level and the second control signal is set to a low level, the circuit will short-circuit, which should be avoided. Set the first control signal to a low level and the second control signal to a high level, and the main loop and the bypass are both disconnected, which can be used as a transition state for switching.

[0175] Please refer to FIG8 , which is a schematic diagram of a power supply circuit provided in some embodiments of the present application.

[0176] In this embodiment, the power supply circuit 50 can be used to supply power to a load 60. The load 60 can include any electrical components.

[0177] The power supply circuit 50 includes at least one group of battery circuits 51 connected in series, and each group of battery circuits 51 includes a battery 30 and any one of the aforementioned battery on-off circuits 10 .

[0178] In some embodiments, the battery connection assembly 12 of the battery on-off circuit 10 is connected to the battery 30, and the external connection assembly 11 of the battery on-off circuit 10 is connected to other battery circuits 51 and / or is used to connect to a load 60. It will be understood that for a specific battery circuit 51, depending on the number of battery circuits 51 and the series connection relationship of the battery circuits 51, the external connection assembly 11 can be connected to other battery circuits 51, or be used to connect to the load 60, or be connected to other battery circuits 51 and also be used to connect to the load 60.

[0179] In some embodiments, the number of battery circuits 51 is one group, and the external connection component 11 is used to connect to the load 60. Specifically, the external connection component 11 includes a first external connection terminal 111 and a second external connection terminal 112, both of which are used to connect to the load 60.

[0180] In some embodiments, there are multiple groups of battery circuits 51. Depending on the position of each group of battery circuits 51 in the circuit, the external connection component 11 of the battery circuit 51 can be connected to other battery circuits 51, or can be connected to other battery circuits 51 and also used to connect to the load 60. Specifically, the external connection component 11 includes a first external connection terminal 111 and a second external connection terminal 112. The first external connection terminal 111 and the second external connection terminal 112 can both be connected to other battery circuits 51, or one can be connected to other battery circuits 51 and the other can be connected to the load 60.

[0181] In a specific application scenario, the battery on-off circuit 10 can be welded to the positive electrode of the battery 30. As shown in Figure 8, the battery on-off circuit 10 is welded to the positive electrode of the battery 30. Specifically, the battery connection assembly 12 is used to connect the first battery connection terminal 121 and the second battery connection terminal 122 of the positive and negative electrodes of the battery 30, respectively. The battery on-off circuit 10 is welded to the positive electrode of the battery 30 via the first battery connection terminal 121, and the second battery connection terminal 122 is connected to the negative electrode.

[0182] It can be understood that, for a group of battery circuits 51 , the load circuit 20 thereof may include the load 60 and the remaining parts of the power supply circuit 50 .

[0183] In some embodiments, the power supply circuit 50 may further include at least one independent battery connected in series. The independent battery is not connected to the battery on / off circuit 10. The position of the independent battery in the power supply circuit 50 can be set according to actual application requirements. For example, the positive and negative electrodes of the independent battery are connected to other independent batteries or the battery circuit 51, or one of the positive and negative electrodes is used to connect to the load 60.

[0184] The battery 30 can be an energy storage battery or a power battery. For example, as shown in FIG8 , multiple energy storage battery cells form a battery string. The battery on / off circuit 10 can be connected to the energy storage battery cells to control whether the connected cells are connected to the circuit. This enables the disconnection of individual cells in the battery string and allows for individual control of each cell. For example, during maintenance or in the event of a fault, individual battery cells can be disconnected without affecting the normal operation of the battery string.

[0185] In some embodiments, the power supply circuit 50 further includes a control module 52, which can be configured to execute any of the aforementioned circuit control methods. Specifically, the control module 52 can be configured to generate a first control signal and a second control signal, and input the first control signal and the second control signal into the switch circuit 13 of the battery on-off circuit 10 to control the external connection component 11 and the battery connection component 12 to be disconnected, thereby forming a first loop with the external connection component 11 and the load circuit 20. Alternatively, the control module 52 can be configured to control the external connection component 11 and the battery connection component 12 to be connected, thereby forming a second loop with the battery 30 and the load circuit 20.

[0186] In the above scheme, the power supply circuit 50 includes at least one group of battery circuits 51 connected in series. The battery on-off circuit 10 can be used to individually control whether each battery 30 in the series battery circuit 51 is connected to the circuit. When the battery 30 is not connected to the circuit, it will not affect the normal operation of the circuit, thereby realizing the decoupling of a single battery.

[0187] Please refer to FIG9 , which is a schematic diagram of an electronic device provided in some embodiments of the present application.

[0188] In this embodiment, the electronic device 70 includes at least one target load 71 and the power supply circuit 50 described above. The power supply circuit 50 is connected to the at least one target load 71 to provide power to the at least one target load 71. FIG7 illustrates an example of a single target load 71. The electronic device 70 can be any electrical device, such as a new energy vehicle. The battery in the power supply circuit 50 can be an energy storage battery or a power battery.

[0189] In a specific application scenario, all target loads 71 ​​may constitute the load 60 corresponding to the power supply circuit 50 .

[0190] In the above solution, the target load 71 is powered by a power supply circuit 50 capable of decoupling a single battery, which can decouple a single battery individually, reducing the possibility of a single battery abnormality affecting the overall power supply and improving the flexibility of the power supply of the electronic device 70.

[0191] In some embodiments, the electronic device 70 further includes a control module 52 , which can be configured to execute any of the above-mentioned circuit control methods.

[0192] The above description is only an implementation method of the present application and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the description and drawings of this application, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A battery on-off circuit, characterized in that: include: External connection components for connecting to a load circuit; A battery connection assembly, used for connecting a battery; The switch circuit is respectively connected to the external connection component and the battery connection component, and is used to control the external connection component and the battery connection component to be in a disconnected state, and the external connection component and the load circuit form a first loop, or to control the external connection component and the battery connection component to be in a connected state, so that the battery and the load circuit form a second loop.

2. The circuit according to claim 1, characterized in that The external connection component comprises a first external connection terminal and a second external connection terminal for respectively connecting two power supply access terminals of the load circuit, and the switch circuit is used to control the formation of a path between the first external connection terminal and the second external connection terminal, so that the first external connection terminal and the second external connection terminal form the first loop with the load circuit; The battery connection assembly includes a first battery connection terminal and a second battery connection terminal for respectively connecting the positive and negative electrodes of the battery. The switch circuit is used to control the formation of a passage between the first external connection terminal and the first battery connection terminal, and the formation of a passage between the second external connection terminal and the second battery connection terminal, so that the battery and the load circuit form the second loop.

3. The circuit according to claim 1, characterized in that The switch circuit comprises: a first switch subcircuit connected to the external connection component and configured to control the external connection component to be connected to the load circuit in response to a first control signal to form the first loop; The second switch subcircuit is connected to the external connection component and the battery connection component respectively, and is used to control the external connection component and the battery connection component to be turned on in response to a second control signal to form the second loop.

4. The circuit according to claim 3, characterized in that The external connection assembly includes a first external connection terminal and a second external connection terminal for respectively connecting two power supply access terminals of the load circuit, and the battery connection assembly includes a first battery connection terminal and a second battery connection terminal for respectively connecting the positive and negative electrodes of the battery; The first switch subcircuit is connected to the first external connection terminal and the second external connection terminal respectively, and is used to form a path between the first external connection terminal and the second external connection terminal in response to a first control signal; The second switch subcircuit is respectively connected to the first external connection terminal, the second external connection terminal, the first battery connection terminal and the second battery connection terminal, and is used to form a path between the first external connection terminal and the first battery connection terminal, and between the second external connection terminal and the second battery connection terminal in response to a second control signal.

5. The circuit according to claim 3, characterized in that The external connection component includes a first external connection terminal and a second external connection terminal for respectively connecting two power supply access terminals of the load circuit, and the first switch subcircuit includes: a first switch tube, wherein a first connection end of the first switch tube is connected to the first external connection end, a second connection end of the first switch tube is connected to the second external connection end, and a control input end of the first switch tube serves as a control input end of the first switch sub-circuit, and is used to receive a third control signal to control the first external connection end and the second external connection end; The third control signal is the first control signal or is generated based on the first control signal.

6. The circuit according to claim 3, characterized in that The switch circuit also includes a first generating sub-circuit, an external input terminal of the first generating sub-circuit is used to receive the first control signal input externally, an output terminal of the first generating sub-circuit is connected to a control input terminal of the first switch sub-circuit, and the first generating sub-circuit is used to generate a third control signal based on the first control signal and output it to the first switch sub-circuit.

7. The circuit according to claim 6, characterized in that The first generating subcircuit includes a first resistor, a second resistor, a second switch tube, a third resistor, and a fourth resistor, wherein: The control input end of the second switch tube is connected in series with the first resistor and the second resistor in sequence and then grounded. The first resistor is connected to one end of the second resistor as an external input end for receiving the first control signal. The first connection end of the second switch tube is connected in series with the third resistor and the fourth resistor in sequence and then connected to the first connection end of the first switch sub-circuit. The first connection end of the first switch sub-circuit is connected to the first external connection end. One end of the third resistor connected to the fourth resistor is connected to the control input end of the first switch sub-circuit.

8. The circuit according to claim 7, characterized in that The first generating subcircuit further includes a first diode, and two ends of the first diode are respectively connected to the control input end and the first connecting end of the first switching subcircuit.

9. The circuit according to claim 3, characterized in that The external connection component includes a first external connection terminal and a second external connection terminal for respectively connecting two power supply access terminals of the load circuit, and the battery connection component includes a first battery connection terminal and a second battery connection terminal for respectively connecting the positive and negative electrodes of the battery, and the first external connection terminal is connected to the first battery connection terminal; The number of the second switch sub-circuits is at least one group, wherein each group of the second switch sub-circuits includes a third switch tube and a fifth resistor, the first connection end of the third switch tube is connected to the second external connection end, the second connection end of the third switch tube is connected to the second battery connection end through the fifth resistor, and the control input end of the third switch tube is used to receive a fourth control signal to control the connection between the second external connection end and the second battery connection end, and the fourth control signal is the second control signal or is generated based on the second control signal.

10. The circuit according to claim 9, characterized in that The first end of the fifth resistor is connected to the second connection end of the third switch tube, and the second end of the fifth resistor and the second battery connection end are both grounded; And / or, the first connection ends of the third switch tubes in all the second switch sub-circuits are connected, and the control input ends of the third switch tubes in all the second switch sub-circuits are connected.

11. The circuit according to claim 3, characterized in that The switching circuit also includes a second generating sub-circuit, an external input terminal of the second generating sub-circuit is used to receive the second control signal input externally, an output terminal of the second generating sub-circuit is connected to a control input terminal of the second switching sub-circuit, and the second generating sub-circuit is used to generate a fourth control signal based on the second control signal and output it to the second switching sub-circuit.

12. The circuit according to claim 11, characterized in that The second generation sub-circuit includes a sixth resistor, a seventh resistor, a fourth switch tube, and an eighth resistor, wherein: The control input end of the fourth switch tube is connected in series with the sixth resistor and the seventh resistor in sequence and then grounded. The sixth resistor is connected to one end of the seventh resistor as an external input end for receiving the second control signal. The first connection end of the fourth switch tube is respectively connected to the first end of the eighth resistor and the control input end of the second switch sub-circuit. The second end of the eighth resistor is connected to a preset power supply.

13. The circuit according to claim 2, characterized in that A protection circuit is connected between the first battery connection terminal and the second battery connection terminal.

14. The circuit according to claim 13, characterized in that The protection circuit includes a second diode and a capacitor connected in series.

15. A circuit control method, characterized in that: Applied to the battery on-off circuit according to any one of claims 1 to 14, the method comprising: generating a first control signal and a second control signal; The first control signal and the second control signal are input into the switch circuit of the battery on-off circuit to control the external connection component and the battery connection component to be in a disconnected state, and the external connection component and the load circuit to form a first loop, or to control the external connection component and the battery connection component to be in a connected state, so that the battery and the load circuit form a second loop.

16. The method according to claim 15, characterized in that The switch circuit includes a first switch subcircuit and a second switch subcircuit; the switch circuit for inputting the first control signal and the second control signal into the battery on-off circuit includes: The first control signal is input into the first switch sub-circuit, and the second control signal is input into the second switch sub-circuit.

17. The method according to claim 15, characterized in that The generating of the first control signal and the second control signal comprises: In response to the battery not needing to be connected to the load circuit, setting the first control signal and the second control signal to a first level combination; or, The generating of the first control signal and the second control signal comprises: In response to the battery needing to be connected to the load circuit, the first control signal and the second control signal are set to a second level combination.

18. The method according to claim 17, characterized in that The first level combination is that the first control signal and the second control signal are both first level signals, the second level combination is that the first control signal and the second control signal are both second level signals, and the first level signal and the second level signal are different.

19. The method according to claim 17, characterized in that Before setting the first control signal and the second control signal to the first level combination or the second level combination, the method further includes: Setting the first control signal and the second control signal to a third level combination to control the external connection component and the battery connection component to be in a disconnected state, and the external connection component and the load circuit to be in a disconnected state; When the external connection component and the battery connection component are in a disconnected state, and when the external connection component and the load circuit are in a disconnected state, the step of setting the first control signal and the second control signal to the first level combination or the second level combination is performed.

20. The method according to claim 19, characterized in that The third level combination is that the first control signal is a second level signal, the second control signal is a first level signal, and the first level signal is different from the second level signal.

21. A power supply circuit, characterized in that: The power supply circuit supplies power to the load, and the power supply circuit includes at least one group of battery circuits connected in series, wherein each group of battery circuits includes: Battery; The battery on-off circuit according to any one of claims 1 to 14, wherein the battery connecting component of the battery on-off circuit is connected to the battery, and the external connecting component of the battery on-off circuit is connected to other battery circuits and / or is used to connect the load.

22. The circuit according to claim 21, characterized in that The power supply circuit also includes a control module for generating a first control signal and a second control signal; inputting the first control signal and the second control signal into the switch circuit of the battery on-off circuit to control the external connection component and the battery connection component to be in a disconnected state, and the external connection component and the load circuit to form a first loop, or controlling the external connection component and the battery connection component to be in a connected state, so that the battery and the load circuit form a second loop.

23. An electronic device, characterized in that: The electronic device includes at least one target load and a power supply circuit, wherein the power supply circuit is connected to the at least one target load to supply power to the at least one target load, and the power supply circuit is the power supply circuit according to claim 21 or 22.

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