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

Abstract

The invention discloses a battery on-off circuit, a circuit control method, a power supply circuit and electronic equipment, the battery on-off circuit comprises an external connection assembly, a battery connection assembly and a switching circuit, and the external connection assembly is used for connecting a load circuit; the battery connecting assembly is used for connecting batteries; the switching circuit is connected with the external connection assembly and the battery connection assembly and used for controlling the external connection assembly and the battery connection assembly to be in a disconnected state, and the external connection assembly and the load circuit form a first loop. Or, the external connection assembly and the battery connection assembly are controlled to be in a connection state, so that the battery and the load circuit form a second loop. In this way, whether the battery is connected to the loop for power supply or not can be independently controlled.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and in particular to a battery on-off circuit, a circuit control method, a power supply circuit, and an electronic device. Background Art

[0002] With the improvement of living standards, people increasingly start to use various batteries in daily life. Battery management is of great significance for devices equipped with batteries.

[0003] Most of the existing battery management systems can achieve data collection of batteries, but they cannot disconnect the battery string, let alone have a means to disconnect a single battery. For example, the abnormality of an individual battery may cause the entire battery pack to stop working. Summary of the Invention

[0004] The present application provides at least a battery on-off circuit, a circuit control method, a power supply circuit, and an electronic device.

[0005] The present application provides a battery on-off circuit, including: an external connection component, a battery connection component, and a switch circuit. The external connection component is used to connect a load circuit; the battery connection component is used to connect 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, 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.

[0006] In the above solution, by cooperating the switch circuit with the external connection component connecting the load circuit and the battery connection component connecting the battery, it is possible to control the battery and the load circuit to form a loop, or, without affecting the load loop, make the battery not in the loop of the load circuit, and it is possible to achieve separate control of whether the battery is connected to the loop for power supply.

[0007] In some embodiments, the external connection component includes a first external connection end and a second external connection end for respectively connecting two power access ends of the load circuit, and the switch circuit is used to control a path to be formed between the first external connection end and the second external connection end, so that the first external connection end and the second external connection end and the load circuit form a first loop; the battery connection component includes a first battery connection end and a second battery connection end for respectively connecting the positive and negative electrodes of the battery, and the switch circuit is used to control a path to be formed between the first external connection end and the first battery connection end, and a path to be formed between the second external connection end and the second battery connection end, so that the battery and the load circuit form a second loop.

[0008] In the above solution, through the control of the switch circuit, the first external connection terminal and the second external connection terminal can be directly connected, so that there is no such battery in the loop of the load circuit without affecting the load loop, and controlling the formation of a path between the first external connection terminal and the first battery connection terminal and a path between the second external connection terminal and the second battery connection terminal can enable the battery to be connected in series into the loop for power supply, and it is possible to separately control whether the battery is connected into the loop for power supply.

[0009] In some embodiments, the switch circuit includes a first switch sub-circuit and a second switch sub-circuit. The first switch sub-circuit is connected to the external connection component and is used to control the conduction between the external connection component and the load circuit in response to a first control signal to form a first loop; the second switch sub-circuit is respectively connected to the external connection component and the battery connection component and is used to control the conduction between the external connection component and the battery connection component in response to a second control signal to form a second loop.

[0010] In the above solution, the first switch sub-circuit and the second switch sub-circuit are respectively controlled by the first control signal and the second control signal to respectively control the formation of the first loop and the second loop, so that it is possible to separately control whether the battery is connected into the loop for power supply.

[0011] 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 electrodes of the battery; the switch circuit includes: a first switch sub-circuit and a second switch sub-circuit. The first switch sub-circuit is respectively connected to the first external connection terminal and the second external connection terminal 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 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 form a path between the first external connection terminal and the first battery connection terminal and a path between the second external connection terminal and the second battery connection terminal in response to a second control signal.

[0012] In the above solution, the first external connection terminal and the second external connection terminal, the formation of a path between 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 are respectively controlled by the first switch sub-circuit and the second switch sub-circuit, so that it is possible to separately control whether the battery is connected into the loop for power supply.

[0013] In some embodiments, the external connection component includes a first external connection end and a second external connection end for respectively connecting two power access ends of a load circuit. The first switch sub-circuit includes a first switch transistor. The first connection end of the first switch transistor is connected to the first external connection end, and the second connection end of the first switch transistor is connected to the second external connection end. The control input end of the first switch transistor serves as the control input end of the first switch sub-circuit and is used to receive a third control signal to control the on / off between 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.

[0014] In the above solution, by using the first switch transistor as a control element, it is possible to control the on / off between the first external connection end and the second external connection end according to the received control signal for forming a first loop.

[0015] In some embodiments, the switch circuit further includes a first generation sub-circuit. The external input end of the first generation sub-circuit is used to receive an externally input first control signal. The output end of the first generation sub-circuit is connected to the control input end of the first switch sub-circuit. The first generation 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.

[0016] In the above solution, the first generation sub-circuit can modulate the external control signal to control the first switch sub-circuit, and the cost of the switch circuit can be reduced through two-stage control.

[0017] In some embodiments, the first generation sub-circuit includes a first resistor, a second resistor, a second switch transistor, a third resistor, and a fourth resistor. Among them, the control input end of the second switch transistor is grounded in sequence after being serially connected with the first resistor and the second resistor. One end of the first resistor connected to the second resistor serves as the external input end for receiving the first control signal. The first connection end of the second switch transistor is serially connected with the third resistor and the fourth resistor 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.

[0018] In the above solution, the first generation sub-circuit is formed by the second switch transistor and the first resistor, the second resistor, the third resistor, and the fourth resistor, which can generate a third control signal in response to the first control signal, thereby realizing two-stage control.

[0019] In some embodiments, the first generation sub-circuit further includes a first diode. Two ends of the first diode are respectively connected to the control input end and the first connection end of the first switch sub-circuit.

[0020] In the above solution, the first diode can serve as a protection circuit to improve the circuit safety.

[0021] In some embodiments, the external connection component includes a first external connection end and a second external connection end for connecting two power access ends of the load circuit respectively, and the battery connection component includes a first battery connection end and a second battery connection end for connecting the positive and negative electrodes of the battery respectively; the first external connection end is connected to the first battery connection end; 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, a first connection end of the third switch tube is connected to the second external connection end, a second connection end of the third switch tube is connected to the second battery connection end through the fifth resistor, and a control input end of the third switch tube is used for receiving a fourth control signal to control the on-off 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.

[0022] In the above solution, by using the third switch tube and the fifth resistor as control elements, the on-off between the second external connection end and the second battery connection end can be controlled according to the received control signal, and in the case where the first external connection end is connected to the first battery connection end, the formation of the second loop can be controlled.

[0023] In some embodiments, a first end of the fifth resistor is connected to a 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.

[0024] In the above solution, through the way of common grounding, the second connection end of the third switch tube can be connected to the second battery connection end through the fifth resistor to form a second loop.

[0025] In some embodiments, 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.

[0026] In the above solution, multiple groups of second switch sub-circuits can be controlled by the same control and have the same conduction state.

[0027] In some embodiments, the switch circuit further includes a second generation sub-circuit, an external input end of the second generation sub-circuit is used for receiving an externally input second control signal, an output end of the second generation sub-circuit is connected to a control input end of the second switch sub-circuit, and the second generation sub-circuit is used for generating a fourth control signal based on the second control signal and outputting it to the second switch sub-circuit.

[0028] In the above solution, the second generation sub-circuit can modulate the external control signal to control the second switch sub-circuit, and the cost of the switch circuit can be reduced through two-stage control.

[0029] In some embodiments, the second generating sub - circuit includes a sixth resistor, a seventh resistor, a fourth switching transistor, and an eighth resistor. Among them, the control input terminal of the fourth switching transistor is grounded after being serially connected to the sixth resistor and the seventh resistor in sequence. One end of the sixth resistor is connected to one end of the seventh resistor as an external input terminal for receiving a second control signal. The first connection terminal of the fourth switching transistor is respectively connected to the first end of the eighth resistor and the control input terminal of the second switching sub - circuit. The second end of the eighth resistor is connected to a preset power supply.

[0030] In the above solution, the second generating sub - circuit is formed by the fourth switching transistor, the sixth resistor, the seventh resistor, and the eighth resistor, which can receive the second control signal and generate a fourth control signal, thereby realizing two - stage control.

[0031] In some embodiments, a protection circuit is connected between the first battery connection terminal and the second battery connection terminal.

[0032] In the above solution, the setting of the protection circuit can improve the circuit safety.

[0033] In some embodiments, the protection circuit includes a second diode and a capacitor connected in series.

[0034] In the above solution, setting the second diode and the capacitor can isolate the direct current and protect the circuit.

[0035] The present application provides a circuit control method applied to the battery on - off circuit as described in any one of the foregoing items. The method includes: 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 disconnection state between the external connection component and the battery connection component, and enabling the external connection component and the load circuit to form a first loop, or controlling the connection state between the external connection component and the battery connection component to enable the battery and the load circuit to form a second loop.

[0036] In the above solution, generating the first control signal and the second control signal and inputting them into the switch circuit to control the switching situation of the switch circuit, realizing the control of the battery and the load circuit to form a loop, or enabling the load circuit to have no such battery in its loop without affecting the load loop, can realize the separate control of whether the battery connected to the battery on - off circuit is connected to the loop for power supply.

[0037] In some embodiments, the switch circuit includes a first switch sub - circuit and a second switch sub - circuit; inputting the first control signal and the second control signal into the switch circuit of the battery on - off circuit includes: inputting the first control signal into the first switch sub - circuit and inputting the second control signal into the second switch sub - circuit.

[0038] In the above solution, the switching circuit includes a first switching sub-circuit and a second switching sub-circuit. The first control signal and the second control signal control the first switching sub-circuit and the second switching sub-circuit respectively to control the battery and the load circuit to form a loop, or to make the battery absent from the loop of the load circuit without affecting the load loop.

[0039] In some embodiments, generating the first control signal and the second control signal includes: in response to the battery not being required 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 being required to be connected to the load circuit, setting the first control signal and the second control signal to a second level combination.

[0040] In the above solution, whether the battery is connected to the load circuit is controlled by setting the control signal to the first level combination and the second level combination.

[0041] In some embodiments, the first level combination is that both the first control signal and the second control signal are first level signals, and the second level combination is that both the first control signal and the second control signal are second level signals, and the first level signal and the second level signal are different.

[0042] In the above solution, when both the first control signal and the second control signal are first level signals, the battery is controlled not to be connected to the load circuit, and when both the first control signal and the second control signal are second level signals, the battery is controlled to be connected to the load circuit, so as to realize separately controlling whether the battery that controls the on-off circuit connection of the battery is connected to the loop for power supply.

[0043] 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 further includes: setting the first control signal and the second control signal to a third level combination to control the disconnection state between the external connection component and the battery connection component, and the disconnection state between the external connection component and the load circuit; in the case where 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, perform the step of setting the first control signal and the second control signal to the first level combination or the second level combination.

[0044] 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 the circuit safety.

[0045] In some embodiments, the third level combination is that the first control signal is a second level signal and the second control signal is a first level signal, and the first level signal and the second level signal are different.

[0046] In the above solution, when the first control signal is the second level signal and the second control signal is the first level signal, it can make the external connection component and the battery connection component in a disconnected state, and the external connection component and the load circuit in a disconnected state, keeping the circuit in a disconnected state.

[0047] The present application provides a power supply circuit for supplying power to a load. The power supply circuit includes at least one group of battery circuits connected in series. Each group of battery circuits includes: a battery and the battery on-off circuit of any one of the foregoing. The battery connection component of the battery on-off circuit is connected to the battery, and the external connection component of the battery on-off circuit is connected to other battery circuits and / or for connecting to the load.

[0048] In the above solution, the power supply circuit includes at least one group of battery circuits connected in series. Through the battery on-off circuit, it is possible to separately control whether each battery in the series-connected battery circuits is connected to the circuit. When the battery is not connected to the circuit, it will not affect the normal operation of the circuit, realizing the disconnection of each battery.

[0049] In some embodiments, the power supply circuit further 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 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.

[0050] In the above solution, the power supply circuit can generate control signals by itself to control the switch circuit, realizing the separate control of whether the battery is connected to the circuit for power supply.

[0051] The present application provides an electronic device. The electronic device includes at least one target load and a power supply circuit. The power supply circuit is connected to at least one target load to supply power to at least one target load, and the power supply circuit is the foregoing power supply circuit.

[0052] In the above solution, using the power supply circuit that can disconnect a single battery to supply power to the target load can separately disconnect a single battery, reduce the possibility that an abnormal single battery affects the overall power supply, and improve the flexibility of power supply of the electronic device.

[0053] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and do not limit the present application. Description of the Drawings

[0054] The accompanying drawings herein are incorporated into and constitute a part of this specification. These drawings illustrate embodiments consistent with the present application and, together with the specification, are used to explain the technical solutions of the present application.

[0055] Figure 1 is the first schematic diagram of a battery on-off circuit provided by some embodiments of the present application;

[0056] Figure 2 is the second schematic diagram of a battery on-off circuit provided by some embodiments of the present application;

[0057] Figure 3 is the third schematic diagram of a battery on-off circuit provided by some embodiments of the present application;

[0058] Figure 4 is the fourth schematic diagram of a battery on-off circuit provided by some embodiments of the present application;

[0059] Figure 5 is the fifth schematic diagram of a battery on-off circuit provided by some embodiments of the present application;

[0060] Figure 6 is the flowchart of a circuit control method provided by some embodiments of the present application;

[0061] Figure 7 is another flowchart of a circuit control method provided by some embodiments of the present application;

[0062] Figure 8 is the schematic diagram of a power supply circuit provided by some embodiments of the present application;

[0063] Figure 9 is the schematic diagram of an electronic device provided by some embodiments of the present application. Detailed Embodiments

[0064] Hereinafter, embodiments of the technical solutions of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to illustrate the technical solutions of the present application more clearly and, therefore, are only examples and should not be used to limit the protection scope of the present application.

[0065] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above accompanying drawings are intended to cover non-exclusive inclusion.

[0066] In the description of the embodiments of the present application, technical terms such as "first" and "second" are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality of" is more than two, unless otherwise specifically defined.

[0067] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in connection with the embodiments can be included in at least one embodiment of the present application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0068] In the description of the embodiments of the present application, the term "and / or" is merely an associative relationship describing associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this article generally represents an "or" relationship between the associated objects before and after.

[0069] The applicant has found that the existing battery management system cannot disconnect a series-connected battery pack, let alone have a means to disconnect a single battery. For example, the abnormality of an individual battery may cause the entire battery pack to fail to work, which will affect the operation of the device. Therefore, the present application proposes the following battery on-off circuit. Compared with the prior art, it can be used to connect to a battery to achieve independent control of whether the battery is connected to the circuit for power supply.

[0070] Please refer to Figure 1 , Figure 1 which is the first schematic diagram of the battery on-off circuit provided by some embodiments of the present application.

[0071] 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.

[0072] Among them, 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 respectively connected to the external connection component 11 and the battery connection component 12.

[0073] The switch circuit 13 can be used to control the disconnection between the external connection component 11 and the battery connection component 12, 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.

[0074] The switch circuit 13 can be used to control the connection state 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 loop. At this time, the battery 30 can supply power to the load circuit 20.

[0075] 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 disconnection state between the external connection component 11 and the battery connection component 12, and the external connection component 11 and the load circuit 20 form a first loop. At this time, the load circuit 20 does not work.

[0076] In some embodiments, when there are other power suppliers in addition to the above-mentioned battery 30, when the above-mentioned battery 30 does not supply power to the load circuit 20, other power suppliers can also supply power. Exemplarily, the load circuit 20 can include other power suppliers and electrical equipment, then the other power suppliers can supply power to the electrical equipment. When the above-mentioned battery 30 and the load circuit 20 form a second loop, the battery 30 can supply power together with other power suppliers.

[0077] In the above solution, by cooperating the switch circuit 13 with the external connection component 11 connected to the load circuit 20 and the battery connection component 12 connected to the battery 30, it can be controlled that the battery 30 and the load circuit 20 form a second loop, or, without affecting the first loop, the battery 30 is not in the first loop, and it can be realized to separately control whether the battery 30 is connected to the loop for power supply.

[0078] In some embodiments, the switch circuit 13 can also control the disconnection state between the external connection component 11 and the load circuit 20.

[0079] Please refer to Figure 2 , Figure 2 which is the second schematic diagram of the battery on-off circuit provided by some embodiments of the present application.

[0080] 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 is respectively connected to the external connection component 11 and the battery connection component 12.

[0081] Among them, the external connection component 11 is used to connect the load circuit 20. The load circuit 20 includes two power access terminals. The external connection component 11 includes a first external connection terminal 111 and a second external connection terminal 112 for respectively connecting the two power access terminals.

[0082] The battery connection component 12 is used to connect the battery 30. The battery connection component 12 includes a first battery connection terminal 121 and a second battery connection terminal 122 for respectively connecting the positive and negative electrodes of the battery 30.

[0083] The switch circuit 13 can be used to control the connection state 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 loop. Specifically, the switch circuit 13 can be used to control a path to be formed between the first external connection end 111 and the first battery connection end 121, and a path to be formed between the second external connection end 112 and the second battery connection end 122, so that the battery 30 and the load circuit 20 form a second loop.

[0084] The switch circuit 13 can be used to control the disconnection state between the external connection component 11 and the battery connection component 12, and the external connection component 11 and the load circuit 20 form a first loop.

[0085] Specifically, in order to control the connection state between the external connection component 11 and the battery connection component 12, it is necessary to form a path between the first external connection end 111 and the first battery connection end 121, and a path between the second external connection end 112 and the second battery connection end 122. To control the disconnection state between the external connection component 11 and the battery connection component 12, the switch circuit 13 can be used to control the disconnection between the first external connection end 111 and the first battery connection end 121, and / or the disconnection between the second external connection end 112 and the second battery connection end 122.

[0086] In this embodiment, the case where the switch circuit 13 controls the disconnection between the second external connection end 112 and the second battery connection end 122 is taken as an example for illustration.

[0087] Specifically, the switch circuit 13 can be used to control a path to be formed between the first external connection end 111 and the second external connection end 112, so that the first external connection end 111 and the second external connection end 112 form a first loop with the load circuit 20.

[0088] In the above solution, through the control of the switch circuit 13, the first external connection end 111 and the second external connection end 112 can be directly connected, so that the battery 30 is not in the first loop without affecting the first loop, and controlling a path to be formed between the first external connection end 111 and the first battery connection end 121, and a path to be formed between the second external connection end 112 and the second battery connection end 122 can make the battery 30 be connected in series into the loop for power supply, and it can be realized to independently control whether the battery 30 is connected into the loop for power supply.

[0089] Please refer to Figure 3 , Figure 3 which is the third schematic diagram of the battery on-off circuit provided by some embodiments of the present application.

[0090] In this embodiment, the switch circuit 13 includes a first switch sub-circuit 131 and a second switch sub-circuit 132. The foregoing control situation can be achieved by controlling with the first switch sub-circuit 131 and the second switch sub-circuit 132, and two different control signals can be used to control different sub-circuits respectively.

[0091] Among them, 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 conduct in response to the first control signal, so as to form a first loop.

[0092] The second switch sub-circuit 132 is respectively connected to the external connection component 11 and the battery connection component 12, and is used to control the external connection component 11 and the battery connection component 12 to conduct in response to the second control signal, so as to form a second loop.

[0093] 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.

[0094] In some cases, the first switch sub-circuit 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.

[0095] Of course, in some embodiments, the foregoing control situation can also be achieved by controlling with the same circuit and a corresponding control signal.

[0096] Furthermore, the external connection component 11 includes a first external connection end 111 and a second external connection end 112 for respectively connecting two power access ends. The battery connection component 12 is used to connect the battery 30, and the battery connection component 12 includes a first battery connection end 121 and a second battery connection end 122 for respectively connecting the positive and negative electrodes of the battery 30.

[0097] The first switch sub-circuit 131 is respectively connected to the first external connection end 111 and the second external connection end 112, and can be used to form a path between the first external connection end 111 and the second external connection end 112 in response to the first control signal, so that the first external connection end 111 and the second external connection end 112 form a second loop with the load circuit 20.

[0098] The second switch sub-circuit 132 is respectively connected to the first external connection end 111, the second external connection end 112, the first battery connection end 121 and the second battery connection end 122, and can be used to form a path between the first external connection end 111 and the first battery connection end 121, and a path between the second external connection end 112 and the second battery connection end 122 in response to the second control signal, so that the battery 30 forms a second loop with the load circuit 20.

[0099] The second switch sub - circuit 132 can also respond to the second control signal to disconnect between the first external connection terminal 111 and the first battery connection terminal 121, and / or disconnect between the second external connection terminal 112 and the second battery connection terminal 122, so that the external connection component 11 and the battery connection component 12 are in a disconnected state.

[0100] Please refer to Figure 4 , Figure 4 which is the fourth schematic diagram of the battery on - off circuit provided by some embodiments of the present application.

[0101] In this embodiment, the first external connection terminal 111 and the first battery connection terminal 121 remain in a connected state, and the switch circuit 13 can control whether to form a second loop between the battery 30 and the load circuit 20 by disconnecting or connecting between the second external connection terminal 112 and the second battery connection terminal 122.

[0102] Specifically, 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. Among them, the first external connection terminal 111 and the second external connection terminal 112 remain in a connected state. The second switch sub - circuit 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.

[0103] Among them, the first control signal and the second control signal can be level signals, which can be generated by an analog circuit or a digital circuit. The first control signal / second control signal can be a first level signal or a second level signal, and the first level signal and the second level signal are different. By setting the first control signal / 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 can be set to the first level signal or the second level signal according to actual application needs, and the specific values of the first level signal and the second level signal can also be set according to actual application needs.

[0104] In a specific application scenario, the first level signal can be a high - level signal, represented by 1, and the second level signal can be a low - level signal, represented by 0.

[0105] Please refer to Figure 5 , Figure 5 which is the fifth schematic diagram of the battery on - off circuit provided by some embodiments of the present application. Figure 5 The battery 30 and the load circuit 20 are not shown in

[0106] In this embodiment, the external connection component 11 includes a first external connection end 111 and a second external connection end 112 for connecting two power access ends respectively. The first switch sub-circuit 131 may be provided with a control input end 1311 for receiving a control signal. The second switch sub-circuit 132 may be provided with a control input end 1321 for receiving a control signal.

[0107] The first switch sub-circuit 131 includes a first switch tube 1312 (Q1). The first switch tube 1312 is provided with a first connection end a1, a second connection end a2, and a control input end a3. The first connection end a1 of the first switch tube 1312 may be connected to the first external connection end 111, and the second connection end a2 of the first switch tube 1312 may be connected to the second external connection end 112.

[0108] The control input end a3 of the first switch tube 1312 may serve as the control input end 1311 of the first switch sub-circuit 131 for receiving a third control signal to control the on / off between the first external connection end 111 and the second external connection end 112, where the third control signal may be the first control signal or a signal generated based on the first control signal.

[0109] As Figure 5 shown, in a specific application scenario, a P-type switch tube (Q1) may be used as the first switch tube 1312. Among them, the source electrode of the P-type switch tube may serve as the first connection end a1 of the first switch tube 1312, the drain electrode may serve as the second connection end a2 of the first switch tube 1312, and the gate electrode may serve as the control input end a3 of the first switch tube 1312.

[0110] It should be noted that when the first control signal and the second control signal are respectively used to control the first switch sub-circuit 131 and the second switch sub-circuit 132, the first control signal / second control signal may directly or indirectly be used to control the first switch sub-circuit 131 / second switch sub-circuit 132. Indirect control may refer to inputting a control signal generated based on the first control signal / second control signal into the first switch sub-circuit 131 / second switch sub-circuit 132 for control.

[0111] In some embodiments, the external connection component 11 includes a first external connection end 111 and a second external connection end 112 for connecting two power access ends respectively. The battery connection component 12 is used to connect the battery 30. The battery connection component 12 includes a first battery connection end 121 and a second battery connection end 122 for connecting the positive electrode and the negative electrode of the battery 30 respectively. The number of the second switch sub-circuits 132 may be one group or multiple groups. Multiple groups of the second switch sub-circuits 132 may jointly share the current of the second loop. Figure 5 The figure also shows a schematic diagram of setting two groups of the second switch sub-circuits 132.

[0112] In some embodiments, a communication state is maintained between the first external connection terminal 111 and the first battery connection terminal 121. The second switch sub-circuit 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.

[0113] Specifically, each group of second switch sub-circuits 132 includes a third switch transistor 1322 (Q4 / Q9) and a fifth resistor 1323 (R16 / R17). The third switch transistor 1322 is provided with 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 through the fifth resistor 1323.

[0114] The control input terminal b3 of the third switch transistor 1322 can be used as the control input terminal 1321 of the second switch sub-circuit 132 to receive a fourth control signal to control the on / off between the second external connection terminal 112 and the second battery connection terminal 122. Among them, the fourth control signal can be the second control signal or a signal generated based on the second control signal.

[0115] As Figure 5 shown, in a specific application scenario, an N-type switch transistor (Q4 / Q9) can be used as the third switch transistor 1322. Among them, the drain of the N-type switch transistor can be used as the first connection terminal b1 of the third switch transistor 1322, the source can be used as the second connection terminal b2 of the third switch transistor 1322, and the gate can be used as the control input terminal b3 of the third switch transistor 1322.

[0116] It should be noted that the fifth resistor 1323 can be connected to the second battery connection terminal 122 in a form of sharing a common ground. Specifically, the first end of the fifth resistor 1323 is connected to the second connection terminal b2 of the third switch transistor 1322, and the second end of the fifth resistor 1323 and the second battery connection terminal 122 are both grounded.

[0117] In the above solution, the second connection terminal b2 of the third switch transistor 1322 can be connected to the second battery connection terminal 122 through the fifth resistor 1323 in a way of sharing a common ground to form a second loop.

[0118] In some embodiments, since there are multiple groups of second switch sub-circuits 132, the first connection terminals b1 of the third switch transistors 1322 in all the second switch sub-circuits 132 are connected, and the control input terminals b3 of the third switch transistors 1322 in all the second switch sub-circuits 132 are connected. The conduction states of all the second switch sub-circuits 132 are the same.

[0119] In the above solution, multiple groups of second switch sub - circuits 132 can be controlled identically, with consistent conduction states.

[0120] In some embodiments, the switch circuit 13 may further include a first generating sub - circuit 133 for generating a third control signal based on the first control signal and outputting it to the first switch sub - circuit 131.

[0121] Further, the first generating sub - circuit 133 is provided with an external input terminal 1331 and an output terminal 1332. Among them, the external input terminal 1331 of the first generating sub - circuit 133 is used to receive the externally input first control signal ( Figure 5 C - A in), and the output terminal 1332 of the first generating sub - circuit 133 can be connected to the control input terminal 1311 of the first switch sub - circuit 131 for outputting the third control signal to the first switch sub - circuit 131.

[0122] In the above solution, the first generating sub - circuit 133 can modulate the external control signal to control the first switch sub - circuit 131, and the cost of the switch circuit 13 can be reduced through two - stage control.

[0123] Further, the first generating sub - circuit 133 may include a first resistor 1333 (R3), a second resistor 1334 (R32), a second switching transistor 1335 (Q5), a third resistor 1336 (R11), and a fourth resistor 1337 (R34).

[0124] Among them, the second switching transistor 1335 is provided with a first connection end c1, a second connection end c2, and a control input terminal c3. The control input terminal c3 of the second switching transistor 1335 is grounded in sequence after being serially connected with the first resistor 1333 and the second resistor 1334. The first resistor 1333 is connected to one end of the second resistor 1334 as the external input terminal 1331 of the first generating sub - circuit 133 for receiving the first control signal. The second connection end c2 of the second switching transistor 1335 is grounded. The first connection end c1 of the second switching transistor 1335 is serially connected with the third resistor 1336 and the fourth resistor 1337 and then connected to the first connection end 1313 of the first switch sub - circuit 131. The first connection end 1313 of the first switch sub - circuit 131 is the end where the first switch sub - circuit 131 is connected to the first external connection end 111. One end where the third resistor 1336 is connected to the fourth resistor 1337 can be used as the output terminal 1332 of the first generating sub - circuit 133 and is connected to the control input terminal 1311 of the first switch sub - circuit 131.

[0125] Such as Figure 5As shown, in a specific application scenario, an N-type switching transistor (Q5) can be used as the second switching transistor 1335. Among them, the drain of the N-type switching transistor can be used as the first connection end c1 of the second switching transistor 1335, the source can be used as the second connection end c2 of the second switching transistor 1335, and the gate can be used as the control input end c3 of the second switching transistor 1335.

[0126] In some embodiments, the first generating sub-circuit 133 may further include a first diode 1338 (D3). Two ends of the first diode 1338 are respectively connected to the control input end 1311 and the first connection end 1313 of the first switching sub-circuit 131. Specifically, the first diode 1338 can be used as a protection circuit. The positive electrode of the first diode 1338 is connected to the control input end 1311 of the first switching sub-circuit 131, and the negative electrode of the first diode 1338 is connected to the first connection end 1313.

[0127] In some embodiments, the switching circuit 13 further includes a second generating sub-circuit 134, configured to generate a fourth control signal based on a second control signal and output it to the second switching sub-circuit 132.

[0128] Further, the second generating sub-circuit 134 is provided with an external input end 1341 and an output end 1342. Among them, the external input end 1341 of the second generating sub-circuit 134 is used to receive the externally input second control signal ( Figure 5 C-B in), and the output end 1342 of the second generating sub-circuit 134 can be connected to the control input end 1321 of the second switching sub-circuit 132, for outputting the fourth control signal to the second switching sub-circuit 132.

[0129] In the above solution, the second generating sub-circuit 134 can modulate the external control signal to control the second switching sub-circuit 132, and the cost of the switching circuit 13 can be reduced through two-stage control.

[0130] Further, the second generating sub-circuit 134 may include a sixth resistor 1343 (R14), a seventh resistor 1344 (R15), a fourth switching transistor 1345 (Q6), and an eighth resistor 1346 (R12).

[0131] Among them, the fourth switching transistor 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 switching transistor 1345 is grounded after being serially connected to a sixth resistor 1343 and a seventh resistor 1344 in sequence. One end of the seventh resistor 1344 to which the sixth resistor 1343 is connected serves as an external input terminal 1341 of the second generating sub-circuit 134 for receiving a second control signal. The first connection terminal d1 of the fourth switching transistor 1345 is respectively connected to the first end of an eighth resistor 1346 and the control input terminal 1321 of the second switching sub-circuit 132, and the second end of the eighth resistor 1346 is connected to a preset power supply 40.

[0132] As Figure 5 shown, in a specific application scenario, an N-type switching transistor (Q6) can be used as the fourth switching transistor 1345. Among them, the drain of the N-type switching transistor can serve as the first connection terminal d1 of the fourth switching transistor 1345, the source can serve as the second connection terminal d2 of the fourth switching transistor 1345, and the gate can serve as the control input terminal d3 of the fourth switching transistor 1345.

[0133] Of course, in some embodiments, the preset power supply 40 can also be set as part of the second generating sub-circuit 134.

[0134] In some embodiments, the foregoing control situation can also be achieved by controlling with the same circuit and a corresponding control signal. Then, only one corresponding generating circuit can be provided to receive an externally input control signal and generate a control signal.

[0135] In some embodiments, a protection circuit 14 is connected between the first battery connection terminal 121 and the second battery connection terminal 122, which can achieve the protection function of blocking direct current.

[0136] Further, the protection circuit 14 may include a second diode 141 (D2) and a capacitor 142 (C2) connected in series. Exemplarily, the positive electrode of the second diode 141 is connected to the first battery connection terminal 121, the negative electrode 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.

[0137] In a specific application scenario, the states of the above-mentioned switching transistors can be controlled by a first control signal and a second control signal to realize the bypass of the battery 30 connected to the battery on-off circuit 10, that is, not connected to the load circuit 20, but without affecting the operation of the load circuit 20. It can also realize the connection of the battery 30 to the load circuit 20 for power supply. Among them, the first control signal and the second control signal are level signals, which can be generated by an analog circuit or a digital circuit. The switching circuit 13 is controlled by controlling the change of the level signal.

[0138] More specifically, it can be set to a high-level signal and a low-level signal, represented by 1 and 0 respectively. The specific control logic is as follows:

[0139]

[0140] Among them, 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.

[0141] 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 circuit.

[0142] The closing of the bypass circuit means that the external connection component 11 and the battery connection component 12 are in a disconnected state, and the external connection component 11 and the load circuit 20 form a first circuit. At this time, the battery 30 does not supply power to the load circuit 20.

[0143] More specifically, the first external connection terminal 111, the first switch sub-circuit 131, the second external connection terminal 112, and the load circuit 20 form a first circuit. And the second switch sub-circuit 132 makes the second battery connection terminal 122 and the second external connection terminal 112 in a disconnected state.

[0144] When both the main circuit and the bypass are closed, the circuit is short-circuited. Therefore, this state needs to be avoided.

[0145] More specifically, the first battery connection terminal 121, the first switch tube 1312, the third switch tube 1322, the fifth resistor 1323, and the first battery connection terminal 121 form a circuit. Since the resistance value of the fifth resistor 1323 is very small, the battery 30 can be regarded as short-circuited.

[0146] When both the main circuit and the bypass are disconnected, then both the main circuit and the bypass do not work. This state can be used as a transition state for switching between the two states of normal operation of the main circuit and the closing of the bypass circuit, thus avoiding circuit short-circuit.

[0147] 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 be matched with any communication system, such as wireless communication, wired communication, and so on.

[0148] In a specific application scenario, the battery on-off circuit 10 can be connected to the positive pole of the battery 30 in a welded form.

[0149] Among them, each switch tube can be correspondingly provided with a body diode, and the regular size of each switch tube can be adjusted according to the magnitude of the current in the circuit.

[0150] Please refer to Figure 6 , Figure 6 which is a schematic flowchart of a circuit control method provided in some embodiments of the present application.

[0151] Among them, 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:

[0152] Step S610: Generate a first control signal and a second control signal.

[0153] In this embodiment, taking the example of using two control signals to control the switch circuit for illustration. Among them, the two control signals are respectively a first control signal and a second control signal, which can be generated by an analog circuit or a digital circuit.

[0154] Step S620: Input the first control signal and the second control signal into the switch circuit of the battery on-off circuit.

[0155] By inputting the first control signal and the second control signal into the switch circuit, the switch circuit is controlled. To achieve that the external connection component and the battery connection component are 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.

[0156] In the above solution, generating the first control signal and the second control signal and inputting them into the switch circuit to control whether the battery is connected to the loop of the load circuit can achieve independent control of whether the battery is connected to the loop for power supply.

[0157] In some embodiments, the switch circuit includes a first switch sub-circuit and a second switch sub-circuit. Step S620 may include: inputting the first control signal into the first switch sub-circuit and inputting the second control signal into the second switch sub-circuit. Using the two control signals to control the two switch sub-circuits respectively, so as to achieve control of 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.

[0158] Furthermore, input the first control signal into the first switch sub-circuit to control the conduction state between the external connection component and the load circuit; input the second control signal into the second switch sub-circuit to control the conduction state between the external connection component and the battery connection component.

[0159] Please refer to Figure 7 , Figure 7 which is another schematic flowchart of the circuit control method provided in some embodiments of the present application. Specifically, the method may include the following steps:

[0160] Step S711: In response to the battery not needing to be connected to the load circuit, set the first control signal and the second control signal to a first level combination.

[0161] Among them, steps S711 and S712 can refer to the relevant descriptions of step S610 in the foregoing embodiments. The first control signal and the second control signal can be level signals, and the first level combination is a combination of level signals for controlling the battery not to be connected to the load circuit. Set the first control signal and the second control signal to the first level combination so that the battery is not connected to the load circuit and does not supply power to the load circuit.

[0162] Specifically, input the first level combination into the switching circuit to control the disconnection state between the external connection component and the battery connection component, and the external connection component forms a first loop with the load circuit.

[0163] Among them, the first level combination can be set according to actual needs.

[0164] Step S712: In response to the battery needing to be connected to the load circuit, set the first control signal and the second control signal to a second level combination.

[0165] Among them, the first control signal and the second control signal can be level signals, and the second level signal is a combination of level signals for controlling the battery to be connected to the load circuit. Set the first control signal and the second control signal to the second level combination so that the battery is connected to the load circuit and supplies power to the load circuit.

[0166] Specifically, input the second level combination into the switching circuit to control the connection state between the external connection component and the battery connection component so that the battery forms a second loop with the load circuit.

[0167] Among them, the second level combination can be set according to actual needs.

[0168] Step S620: Input the first control signal and the second control signal into the switching circuit of the battery on-off circuit.

[0169] This method can be applied to any of the foregoing battery on-off circuits. Exemplarily, 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.

[0170] In a specific application scenario, as Figure 5 shown, the first control signal is Figure 5 C-A in Figure 5C-B. The first level combination is that both the first control signal and the second control signal are 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 disconnection between the external connection component and the battery connection component, and the external connection component and the load circuit form a first loop, so that the battery is not connected to the load circuit.

[0171] The second level combination is that both the first control signal and the second control signal are 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 connection between the external connection component and the battery connection component, so that the battery and the load circuit form a second loop, and the battery is connected to the load circuit.

[0172] 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 disconnection between the external connection component and the battery connection component, and the disconnection between the external connection component and the load circuit. At this time, the battery on-off circuit does not form a loop with the load circuit.

[0173] Among them, the third level combination can be set according to actual needs.

[0174] It should be noted that since both the first control signal and the second control signal can be set to the first level signal or the second level signal, four level combinations can be obtained. In addition to the foregoing level combinations, there is also a fourth level combination, which makes the external connection component and the battery connection component in a conducting state, and the external connection component and the load circuit in a conducting state. In this case, the battery will be short-circuited. Therefore, in the circuit control method, the first control signal and the second control signal should be avoided being set to the fourth level combination.

[0175] In some embodiments, the third level combination can be used before the battery on-off circuit is started and needs to be adjusted to the first level combination or the second level combination. In some embodiments, it can also be used when switching between the first level combination and the second level combination. At this time, one of the first level combination and the second level combination is the current level combination, and the other is the level combination to be switched. First, it can be switched from the current level combination to the third level combination, and then from the third level combination to the level combination to be switched.

[0176] It should be noted that the third level combination can be used as a transition state for the transition state of the battery being connected and not connected. Since components require a certain change time when the signal changes, the situation of circuit short-circuit can be avoided.

[0177] Further, in the case where 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, perform the step of setting the first control signal and the second control signal to the first level combination or the second level combination. This can avoid the occurrence of a short circuit in the circuit and improve the circuit safety.

[0178] Exemplarily, the third level combination may be 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. In a specific application scenario, as Figure 5 shown, the first control signal is Figure 5 C-A in Figure 5 and the second control signal is C-B in

[0179] It should be noted that any of the foregoing circuit control methods may be executed by a control module having processing capabilities.

[0180] In a specific application scenario, the battery on-off circuit may be as Figure 5 shown. 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. Setting both the first control signal and the second control signal to a high level, the battery is not connected to the loop for power supply. Setting both the first control signal and the second control signal to a low level, the battery is connected to the loop for power supply. Setting the first control signal to a high level and the second control signal to a low level will cause a short circuit in the circuit, which should be avoided. Setting the first control signal to a low level and the second control signal to a high level, both the main loop and the bypass are disconnected, which can be used as a transition state for switching.

[0181] Please refer to Figure 8 Figure 8 which is a schematic diagram of a power supply circuit provided by some embodiments of the present application.

[0182] In this embodiment, the power supply circuit 50 can be used to supply power to the load 60. Among them, the load 60 may include any electrical component.

[0183] Among them, 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 511(30) and any of the foregoing battery on-off circuits 512(10).

[0184] ​In some embodiments, the battery connection component 12 of the battery on-off circuit 10 is connected to the battery 511, and the external connection component 11 of the battery on-off circuit 10 is connected to other battery circuits 51 and / or for connecting to a load 60. It can be understood that for a specific battery circuit 51, according to the number of battery circuits 51 and the series connection relationship of the battery circuits 51, the external connection component 11 can be connected to other battery circuits 51, or for connecting to the load 60, or connected to other battery circuits 51 and also for connecting to the load 60.

[0185] In some embodiments, the number of battery circuits 51 is one group, and the external connection component 11 is for connecting to the load 60. Specifically, the external connection component 11 includes a first external connection end 111 and a second external connection end 112, and both the first external connection end 111 and the second external connection end 112 are for connecting to the load 60.

[0186] In some embodiments, the number of battery circuits 51 is multiple groups. According to 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 for connecting to the load 60. Specifically, the external connection component 11 includes a first external connection end 111 and a second external connection end 112. The first external connection end 111 and the second external connection end 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.

[0187] In a specific application scenario, the battery on-off circuit 10 can be welded to the positive electrode of the battery 511(30). As Figure 8 shown, the battery on-off circuit 10 is welded to the positive electrode of the battery 511(30). Specifically, the battery connection component 12 is used for the first battery connection end 121 and the second battery connection end 122 that respectively connect to the positive electrode and the negative electrode of the battery 30. Among them, the battery on-off circuit 10 is welded to the positive electrode of the battery 511(30) via the first battery connection end 121, and the second battery connection end 122 is connected to the negative electrode.

[0188] It can be understood that for a group of battery circuits 51, its load circuit 20 can include the load 60 and the remaining part of the power supply circuit 50.

[0189] In some embodiments, at least one independent battery can also be connected in series in the power supply circuit 50. The independent battery is not connected to the battery on-off circuit 10, and the position of the independent battery in the power supply circuit 50 can be set according to actual application requirements. Exemplarily, the positive and negative electrodes of the independent battery are connected to other independent batteries or battery circuits 51, or one of the positive and negative electrodes is for connecting to the load 60.

[0190] Among them, the battery 511(30) can be an energy storage battery, a power battery, or the like.

[0191] Exemplarily, as Figure 8 shown, multiple energy storage battery monomers form a battery string. The battery on-off circuit 10 can be connected to the energy storage battery monomers to control whether the monomers it is connected to are connected into the circuit, thereby realizing the disconnection of each monomer in the battery string and enabling individual control of each monomer battery. Exemplarily, in cases such as maintenance and faults, the battery monomers can be individually disconnected without affecting the normal operation of the battery string.

[0192] In some embodiments, the power supply circuit 50 further includes a control module 52. The control module 52 can be used to execute any of the above circuit control methods. Specifically, it can be used 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 achieve controlling 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. Or, 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.

[0193] In the above solution, the power supply circuit 50 includes at least one group of battery circuits 51 connected in series. Through the battery on-off circuit 10, it is possible to individually control whether each battery 511 in the series-connected battery circuits 51 is connected to the circuit. When the battery 511 is not connected to the circuit, it will not affect the normal operation of the circuit, realizing the disconnection of a single battery.

[0194] Please refer to Figure 9 , Figure 9 which is a schematic diagram of an electronic device provided by some embodiments of the present application.

[0195] In this embodiment, the electronic device 70 includes at least one target load 71 and the power supply circuit 72(50) as described above. The power supply circuit 72 is connected to at least one target load 71 to supply power to at least one target load 71. Figure 7 Take the case where there is one target load 71 as an example.

[0196] Among them, the electronic device 70 can be any electrical device, for example, a new energy vehicle, etc. Among them, the battery in the power supply circuit 72 can be an energy storage battery or a power battery, etc.

[0197] In a specific application scenario, all the target loads 71 can constitute the load 60 corresponding to the power supply circuit 72.

[0198] In the above solution, the power supply circuit 72 capable of disconnecting a single battery is used to supply power to the target load 71, which can disconnect a single battery separately, reduce the possibility of abnormal operation of a single battery affecting the overall power supply, and improve the flexibility of power supply for the electronic device 70.

[0199] In some embodiments, the electronic device 70 further includes a control module 73, and the control module 73 can be used to execute any of the above circuit control methods.

[0200] The above are only the embodiments of the present application, and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present application, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present application.

Claims

1. A battery on-off circuit, characterized in that, it includes: An external connection component for connecting to a load circuit; A battery connection component for connecting to a battery; A switch circuit, respectively connected to the external connection component and the battery connection component, for controlling the disconnection state between the external connection component and the battery connection component, and forming a first loop between the external connection component and the load circuit, or, controlling the connection state between the external connection component and the battery connection component, 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 includes a first external connection end and a second external connection end for respectively connecting two power access ends of the load circuit, and the switch circuit is used to control a path to be formed between the first external connection end and the second external connection end, so that the first external connection end and the second external connection end form the first loop with the load circuit; The battery connection component includes a first battery connection end and a second battery connection end for respectively connecting the positive and negative electrodes of the battery, and the switch circuit is used to control a path to be formed between the first external connection end and the first battery connection end, and a path to be formed between the second external connection end and the second battery connection end, 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 includes: A first switch sub-circuit, connected to the external connection component, for responding to a first control signal and controlling the conduction between the external connection component and the load circuit to form the first loop; A second switch sub-circuit, respectively connected to the external connection component and the battery connection component, for responding to a second control signal and controlling the conduction between the external connection component and the battery connection component to form the second loop.

4. The circuit according to claim 3, characterized in that, The external connection component includes a first external connection end and a second external connection end for respectively connecting two power access ends of the load circuit, and the battery connection component includes a first battery connection end and a second battery connection end for respectively connecting the positive and negative electrodes of the battery; The first switch sub-circuit is respectively connected to the first external connection end and the second external connection end, and is used to respond to a first control signal to form a path between the first external connection end and the second external connection end; The second switch sub-circuit is respectively connected to the first external connection end, the second external connection end, the first battery connection end and the second battery connection end, and is used to respond to a second control signal to form a path between the first external connection end and the first battery connection end, and a path between the second external connection end and the second battery connection end.

5. The circuit according to claim 3, characterized in that, The external connection component includes a first external connection end and a second external connection end for respectively connecting two power access ends of the load circuit, and the first switch sub-circuit includes: A first switching transistor, wherein a first connection end of the first switching transistor is connected to the first external connection end, a second connection end of the first switching transistor is connected to the second external connection end, and a control input end of the first switching transistor serves as a control input end of the first switching sub-circuit and is configured to receive a third control signal for controlling conduction and interruption between the first external connection end and the second external connection end, and 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, wherein, the switching circuit further includes a first generating sub-circuit, an external input end of the first generating sub-circuit is configured to receive the externally input first control signal, an output end of the first generating sub-circuit is connected to the control input end of the first switching sub-circuit, and the first generating sub-circuit is configured to generate a third control signal based on the first control signal and output the third control signal to the first switching sub-circuit.

7. The circuit according to claim 6, wherein, the first generating sub-circuit includes a first resistor, a second resistor, a second switching transistor, a third resistor, and a fourth resistor, wherein a control input end of the second switching transistor is grounded after being serially connected to the first resistor and the second resistor in sequence, one end of the second resistor where the first resistor is connected serves as an external input end for receiving the first control signal, a first connection end of the second switching transistor is serially connected to the third resistor and the fourth resistor in sequence and then connected to a first connection end of the first switching sub-circuit, the first connection end of the first switching sub-circuit is connected to the first external connection end, and one end of the third resistor where the fourth resistor is connected is connected to the control input end of the first switching sub-circuit.

8. The circuit according to claim 7, wherein, the first generating sub-circuit further includes a first diode, and two ends of the first diode are respectively connected to the control input end and the first connection end of the first switching sub-circuit.

9. The circuit according to claim 3, wherein, the external connection component includes a first external connection end and a second external connection end for respectively connecting two power access ends of the load circuit, the battery connection component includes a first battery connection end and a second battery connection end for respectively connecting the positive and negative electrodes of the battery, and the first external connection end is connected to the first battery connection end; the number of the second switching sub-circuits is at least one group, and each group of the second switching sub-circuits includes a third switching transistor and a fifth resistor, a first connection end of the third switching transistor is connected to the second external connection end, a second connection end of the third switching transistor is connected to the second battery connection end through the fifth resistor, and a control input end of the third switching transistor is configured to receive a fourth control signal for controlling conduction and interruption 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, wherein, The first end of the fifth resistor is connected to the second connection end of the third switching transistor, and the second end of the fifth resistor and the second battery connection end are both grounded; and / or, connected to the first connection ends of the third switching transistors in all the second switching sub-circuits, and connected to the control input ends of the third switching transistors in all the second switching sub-circuits.

11. The circuit according to claim 3, characterized in that, the switching circuit further includes a second generating sub-circuit, an external input end of the second generating sub-circuit is used to receive the externally input second control signal, an 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 configured 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 generating sub-circuit includes a sixth resistor, a seventh resistor, a fourth switching transistor, and an eighth resistor, wherein, the control input end of the fourth switching transistor is sequentially connected in series with the sixth resistor and the seventh resistor and then grounded, one end of the seventh resistor to which the sixth resistor is connected serves as an external input end for receiving the second control signal, the first connection end of the fourth switching transistor is respectively connected to the first end of the eighth resistor and the control input end of the second switching sub-circuit, and 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 end and the second battery connection end.

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 includes: 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 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.

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

17. The method according to claim 15, characterized in that, the 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, the generating the first control signal and the second control signal includes: In response to the battery needing to be connected to the load circuit, set the first control signal and the second control signal to a second level combination.

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

19. The method according to claim 17, wherein, before setting the first control signal and the second control signal to the first level combination or the second level combination, further includes: setting the first control signal and the second control signal to a third level combination to control that 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; 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, perform the step of setting the first control signal and the second control signal to the first level combination or the second level combination.

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

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

22. The circuit according to claim 21, wherein, the power supply circuit further 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 that the external connection component and the battery connection component are in a disconnected state, and the external connection component and the load circuit form a first loop, or control that the external connection component and the battery connection component are in a connected state so that the battery and the load circuit form a second loop.

23. An electronic device, wherein, 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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