A power supply circuit, a battery management system and an electronic device

Abstract

The utility model discloses a kind of power supply circuit, battery management system and electronic equipment, power supply circuit includes: charging loop, its power receiving end connects battery, its first power supply end connects load;Control circuit, its first detection end connects load enable end, its control end connects the controlled end in charging loop;Charging circuit, its input end connects the second power supply end of charging loop, its output end connects the first detection end of control circuit;Charging circuit is charged when receiving low level signal in first detection end;Activation circuit, its input end connects the second power supply end of charging loop, its output end connects the second detection end of control circuit, in the process of charging of charging circuit conduction, activation signal is output to the second detection end of control circuit.The power supply circuit of present application increases the activation mode of battery, can use battery to activate battery to power supply, also can connect load to activate battery to power supply when there is no charger.

Description

Technical Field

[0001] This utility model relates to the field of battery activation, and in particular to a power supply circuit, a battery management system, and an electrical device. Background Technology

[0002] In today's electronic devices, lithium batteries have gained widespread application due to their superior high energy density, long lifespan, and lightweight characteristics. However, existing power supply circuits can only activate lithium batteries by connecting a charger. The voltage is detected by the power supply circuit's detection terminal to wake up the battery and restore it to normal operation. But this method requires a charger, which is extremely inconvenient in certain situations, especially when a charger is unavailable or unusable. Summary of the Invention

[0003] This utility model provides a power supply circuit, a battery management system, and an electronic device to solve the problem that existing power supply circuits cannot activate the battery and thus cannot provide power when the charger is not connected.

[0004] To achieve the above objectives, in one embodiment, a power supply circuit is provided, the power supply circuit comprising:

[0005] A charging circuit, wherein the receiving end of the charging circuit is used to connect to the battery, and the first power supply end of the charging circuit is used to connect to the receiving end of the load;

[0006] A control circuit, wherein the first detection terminal of the control circuit is connected to the enable terminal of the load, and the control terminal of the control circuit is connected to the controlled terminal in the charging circuit;

[0007] A charging circuit, wherein the input terminal of the charging circuit is connected to the second power supply terminal of the charging circuit, and the output terminal of the charging circuit is connected to the first detection terminal of the control circuit; the charging circuit is used to charge when the first detection terminal receives a low-level signal.

[0008] An activation circuit is provided, wherein the input terminal of the activation circuit is connected to the second power supply terminal of the charging circuit, and the output terminal of the activation circuit is connected to the second detection terminal of the control circuit. The activation circuit is used to conduct during the charging process of the charging circuit and output an activation signal to the second detection terminal of the control circuit.

[0009] In one embodiment, the charging circuit includes:

[0010] A first resistor module and a capacitor module are provided. The first port of the first resistor module serves as the input terminal of the charging circuit. The second port of the first resistor module is connected to the first port of the capacitor module, and the second port of the capacitor module serves as the output terminal of the charging circuit.

[0011] In one embodiment, the charging circuit further includes:

[0012] The second resistor module has its first port connected to the first port of the capacitor module, and its second port connected to the second port of the capacitor module.

[0013] In one embodiment, the activation circuit includes:

[0014] A first switch module and a third resistor module are used. The first port of the first switch module serves as the input terminal of the activation circuit. The second port of the first switch module is connected to the first port of the third resistor module. The second port of the third resistor module serves as the output terminal of the activation circuit. The control port of the first switch module is connected to the input terminal of the charging circuit.

[0015] In one embodiment, the first resistor module includes a first resistor and a second resistor, one end of the first resistor serves as a first port of the first resistor module, the other end of the first resistor is connected to one end of the second resistor, and the other end of the second resistor serves as a second port of the first resistor module.

[0016] The activation circuit includes:

[0017] A first switch module and a third resistor module are connected. The first port of the first switch module serves as the input terminal of the activation circuit. The second port of the first switch module is connected to the first port of the third resistor module. The second port of the third resistor module serves as the output terminal of the activation circuit. The control port of the first switch module is connected to the first resistor and the second resistor.

[0018] In one embodiment, the first switching module includes a first switching transistor, the input terminal of the first switching transistor serves as a first port of the first switching module, the output terminal of the first switching transistor serves as a second port of the first switching module, and the control terminal of the first switching transistor serves as a control port of the first switching module.

[0019] In one embodiment, a battery management system is provided, the battery management system including the power supply circuit described above.

[0020] In one embodiment, the charging circuit includes:

[0021] A positive charging branch and a negative charging branch are provided. The receiving end of the positive charging branch is used to connect to the positive terminal of the battery, and the power supply end of the positive charging branch is used to connect to the positive receiving end of the load. The receiving end of the negative charging branch is used to connect to the negative terminal of the battery, and the power supply end of the negative charging branch is used to connect to the negative receiving end of the load.

[0022] The positive charging branch is provided with a second switch module, and the control terminal of the second switch module serves as the controlled terminal in the charging circuit.

[0023] In one embodiment, the second switching module includes a second switching transistor and a third switching transistor. The input terminal of the second switching transistor is used to input the power supply signal output from the positive terminal of the battery. The output terminal of the second switching transistor is connected to the input terminal of the third switching transistor, and the output terminal of the third switching transistor serves as the power supply terminal of the positive charging branch. The control terminal of the second switching transistor is connected to the first control terminal of the control circuit, and the control terminal of the third switching transistor is connected to the second control terminal of the control circuit.

[0024] In one embodiment, an electronic device is provided, the electronic device including the power supply circuit described above, or the battery management system described above.

[0025] The aforementioned power supply circuit, battery management system, and electronic device connect the receiving end of the charging circuit to the battery, and the first power supply end of the charging circuit to the load. After the first detection end of the control circuit detects a low-level signal, the control end of the control circuit controls the controlled end of the charging circuit, causing the charging circuit to conduct. Charging is then supplied to the charging circuit through the second power supply end of the charging circuit. While the charging circuit is charging, the activation circuit outputs an activation signal to the control circuit. Upon receiving the activation signal, the control circuit activates the battery, enabling the power supply circuit to activate the battery for power supply even without a charger. This power supply circuit solution adds a battery activation method, allowing the battery to be activated using a rechargeable battery or connected to a load for power supply when no charger is available. This not only eliminates the dependence on a dedicated charger and expands application capabilities but also reduces costs and maintenance complexity. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the power supply circuit modules in one embodiment of the present invention;

[0028] Figure 2 This is an example diagram of the activation circuit and charging circuit in one embodiment of the present invention;

[0029] Figure 3 This is another example diagram of the activation circuit and charging circuit in one embodiment of the present invention;

[0030] Figure 4 This is a circuit diagram of an example of an activation circuit and a charging circuit in one embodiment of the present invention;

[0031] Figure 5 This is a detailed circuit diagram of the second switch module in one embodiment of this utility model;

[0032] Figure 6 This is a specific circuit diagram of the battery management system in one embodiment of the present invention.

[0033] Reference numerals: 1. Control circuit; 2. Charging circuit; 201. First resistor module; 202. Capacitor module; 3. Activation circuit; 301. First switch module; 302. Third resistor module; 4. Charging circuit; 401. Positive charging branch; 402. Negative charging branch; 403. Second switch module. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0035] It should be understood that this invention can be embodied in various forms and should not be construed as being limited to the embodiments set forth herein. Rather, providing these embodiments will make the disclosure thorough and complete, and will fully convey the scope of this invention to those skilled in the art. In the drawings, for clarity, the dimensions of layers and regions, as well as their relative dimensions, may be exaggerated. The same reference numerals denote the same elements throughout.

[0036] It should be understood that when an element or layer is referred to as "on," "adjacent to," "connected to," or "coupled to" other elements or layers, it may be directly on, adjacent to, connected to, or coupled to other elements or layers, or there may be intervening elements or layers. Conversely, when an element is referred to as "directly on," "directly adjacent to," "directly connected to," or "directly coupled to" other elements or layers, there are no intervening elements or layers. It should be understood that although the terms first, second, third, etc., may be used to describe various elements, components, areas, layers, and / or portions, these elements, components, areas, layers, and / or portions should not be limited by these terms. These terms are only used to distinguish one element, component, area, layer, or portion from another element, component, area, layer, or portion. Therefore, without departing from the teachings of this utility model, the first element, component, area, layer, or portion discussed below may be referred to as the second element, component, area, layer, or portion.

[0037] Spatial relation terms such as “below,” “under,” “below,” “under,” “above,” “above,” etc., are used herein for convenience of description to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms are intended to also include different orientations of the device in use and operation. For example, if the device in the figure is flipped, then the element or feature described as “below,” “under,” or “below” other elements or features will be oriented “above” other elements or features. Therefore, the exemplary terms “below” and “under” can include both above and below orientations. The device may be otherwise oriented (rotated 90 degrees or otherwise) and the spatial descriptive terms used herein will be interpreted accordingly.

[0038] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. When used herein, the singular forms “a,” “an,” and “the” are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising” and / or “including,” when used in this specification, identify the presence of the stated features, integers, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups. When used herein, the term “and / or” includes any and all combinations of the associated listed items.

[0039] To fully understand this utility model, detailed structures and steps will be presented in the following description to illustrate the technical solution proposed by this utility model. Preferred embodiments of this utility model are described in detail below; however, in addition to these detailed descriptions, this utility model may have other embodiments.

[0040] In one embodiment, such as Figure 1 As shown, a power supply circuit is provided, the power supply circuit comprising:

[0041] Charging circuit 4, wherein the receiving end of the charging circuit 4 is used to connect to the battery, and the first power supply end of the charging circuit 4 is used to connect to the receiving end of the load;

[0042] Control circuit 1, wherein the first detection terminal of the control circuit 1 is connected to the enable terminal of the load, and the control terminal of the control circuit 1 is connected to the controlled terminal in the charging circuit 4;

[0043] The charging circuit 2 has its input terminal connected to the second power supply terminal of the charging circuit 4, and its output terminal connected to the first detection terminal of the control circuit 1. The charging circuit 2 is used to charge when the first detection terminal receives a low-level signal.

[0044] The activation circuit 3 has its input terminal connected to the second power supply terminal of the charging circuit 4 and its output terminal connected to the second detection terminal of the control circuit 1. The activation circuit 3 is used to conduct during the charging process of the charging circuit 2 and output an activation signal to the second detection terminal of the control circuit 1.

[0045] The charging circuit 4 may include a first switch or a second switch, and the control terminal of the switch is the controlled terminal of the charging circuit 4.

[0046] The operation of the above power supply circuit is as follows:

[0047] Connect the receiving end of the charging circuit 4 to the battery, and connect the first power supply ends P+ and P- of the charging circuit 4 to the load respectively.

[0048] When the first detection terminal PRSE of the control circuit 1 detects a low-level signal, the control terminal L1 of the control circuit 1 sends a signal to the controlled terminal L2 of the charging circuit 4, causing the charging circuit 4 to be turned on;

[0049] The battery is powered by the second power supply terminal L3 of the charging circuit 4, and the charging circuit 2 is charged through its input terminal;

[0050] When the charging circuit 2 is charging, the output terminal of the activation circuit 3 outputs a high-level activation signal to the second detection terminal PACK of the control circuit 1.

[0051] When the second detection terminal PACK of control circuit 1 detects a high-level activation signal, the battery enters the running mode from the power-off mode and is activated.

[0052] Once the charging circuit 2 is fully charged, the activation circuit 3 will no longer output an activation signal.

[0053] In this embodiment, the receiving end of the charging circuit is connected to the battery, and the first power supply end of the charging circuit is connected to the load. After the first detection end of the control circuit detects a low-level signal, the control end of the control circuit controls the controlled end of the charging circuit, causing the charging circuit to conduct. The charging circuit is then charged through the second power supply end of the charging circuit. While the charging circuit is charging, the activation circuit outputs an activation signal to the control circuit. Upon receiving the activation signal, the control circuit activates the battery, enabling the power supply circuit to activate the battery for power supply even without a charger. This solution adds a battery activation method, allowing the battery to be activated using a rechargeable battery or connected to a load for power supply when no charger is available. This not only eliminates the dependence on a dedicated charger and expands application capabilities but also reduces costs and maintenance complexity.

[0054] In one embodiment, such as Figure 2 As shown, the charging circuit 2 includes:

[0055] A first resistor module 201 and a capacitor module 202 are connected. The first port of the first resistor module 201 serves as the input terminal of the charging circuit 2. The second port of the first resistor module 201 is connected to the first port of the capacitor module 202. The second port of the capacitor module 202 serves as the output terminal of the charging circuit 2.

[0056] The operation of the above power supply circuit is as follows:

[0057] Connect the receiving end of the charging circuit 4 to the battery, and connect the first power supply ends P+ and P- of the charging circuit 4 to the load respectively.

[0058] When the first detection terminal PRSE of the control circuit 1 detects a low-level signal, the control terminal L1 of the control circuit 1 sends a signal to the controlled terminal L2 of the charging circuit 4, causing the charging circuit 4 to be turned on;

[0059] The battery is powered by the second power supply terminal L3 of the charging circuit 4, and then charges the capacitor module 202 after passing through the first resistor module 201 of the charging circuit 2.

[0060] When the charging circuit 2 is charging, the output terminal of the activation circuit 3 outputs a high-level activation signal to the second detection terminal PACK of the control circuit 1.

[0061] When the second detection terminal PACK of control circuit 1 detects a high-level activation signal, the battery enters the running mode from the power-off mode and is activated.

[0062] Once the capacitor module 202 of the charging circuit 2 is fully charged, the activation circuit 3 will no longer output an activation signal.

[0063] In this embodiment, a first resistor module and a capacitor module are set in the charging circuit. When the capacitor module is charged, the activation circuit outputs an activation signal to the control circuit. After receiving the activation signal, the control circuit enters the operating mode from the power-off mode, realizing battery activation. This allows the power supply circuit to activate the battery for power supply even when there is no charger. The power supply circuit of this solution increases the battery activation method. It can use a rechargeable battery to activate the battery for power supply, or connect a load to activate the battery for power supply when there is no charger. This not only eliminates the dependence on a dedicated charger and expands the application capabilities, but also reduces costs and maintenance difficulty.

[0064] In one embodiment, such as Figure 2 As shown, the charging circuit 2 further includes:

[0065] The second resistor module 203 has its first port connected to the first port of the capacitor module 202, and its second port connected to the second port of the capacitor module 203.

[0066] The operation of the above power supply circuit is as follows:

[0067] Connect the receiving end of the charging circuit 4 to the battery, and connect the first power supply ends P+ and P- of the charging circuit 4 to the load respectively.

[0068] When the first detection terminal PRSE of the control circuit 1 detects a low-level signal, the control terminal L1 of the control circuit 1 sends a signal to the controlled terminal L2 of the charging circuit 4, causing the charging circuit 4 to be turned on;

[0069] The battery is powered by the second power supply terminal L3 of the charging circuit 4. After passing through the first resistor module 201 of the charging circuit 2, it charges the capacitor module 202. The charging speed of the capacitor module 202 is changed by the second resistor module 203.

[0070] When the charging circuit 2 is charging, the output terminal of the activation circuit 3 outputs a high-level activation signal to the second detection terminal PACK of the control circuit 1.

[0071] When the second detection terminal PACK of control circuit 1 detects a high-level activation signal, the battery enters the running mode from the power-off mode and is activated.

[0072] Once the capacitor module 202 of the charging circuit 2 is fully charged, the activation circuit 3 will no longer output an activation signal.

[0073] In this embodiment, a first resistor module, a second resistor module, and a capacitor module are set in the charging circuit. When the capacitor module is charged, the activation circuit outputs an activation signal to the control circuit. After receiving the activation signal, the control circuit enters the operating mode from the power-off mode, realizing battery activation. This allows the power supply circuit to activate the battery for power supply even when there is no charger. This solution increases the battery activation method, allowing the battery to be activated for power supply using a rechargeable battery or by connecting a load when there is no charger. This not only eliminates the dependence on a dedicated charger and expands application capabilities but also reduces cost and maintenance difficulty.

[0074] In one embodiment, such as Figure 3 As shown, the activation circuit 3 includes:

[0075] A first switch module 301 and a third resistor module 302 are connected. The first port of the first switch module 301 serves as the input terminal of the activation circuit 3. The second port of the first switch module 301 is connected to the first port of the third resistor module 302. The second port of the third resistor module 302 serves as the output terminal of the activation circuit 3. The control port of the first switch module 301 is connected to the input terminal of the charging circuit 2.

[0076] The first switch module 301 can be a single switch transistor or an integrated switch chip.

[0077] The operation of the above power supply circuit is as follows:

[0078] Connect the receiving end of the charging circuit 4 to the battery, and connect the first power supply ends P+ and P- of the charging circuit 4 to the load respectively.

[0079] When the first detection terminal PRSE of the control circuit 1 detects a low-level signal, the control terminal L1 of the control circuit 1 sends a signal to the controlled terminal L2 of the charging circuit 4, causing the charging circuit 4 to be turned on;

[0080] The battery is powered by the second power supply terminal L3 of the charging circuit 4, and then charges the capacitor module 202 after passing through the first resistor module 201 of the charging circuit 2.

[0081] When the charging circuit 2 is charging, the input terminal of the charging circuit 2 is at a high level. After the control terminal of the first switch module 301 of the activation circuit 3 receives the high-level signal, it is turned on. After the signal passes through the first switch module 301 and the third resistor module 302, a high-level activation signal is output to the second detection terminal PACK of the control circuit 1.

[0082] When the second detection terminal PACK of control circuit 1 detects a high-level activation signal, the battery enters the running mode from the power-off mode and is activated.

[0083] When the capacitor module 202 of the charging circuit 2 is fully charged, the input terminal of the charging circuit 2 is at a low level. After the control terminal of the first switch module 301 of the activation circuit 3 receives the low-level signal, it turns off, so that the activation circuit 3 no longer outputs the activation signal.

[0084] In this embodiment, a first switch module and a third resistor module are included in the activation circuit. When the charging circuit is charging, the first switch module is turned on, and the activation circuit outputs an activation signal to the control circuit. Upon receiving the activation signal, the control circuit switches the battery from the power-off mode to the operating mode, thus activating the battery. This allows the power supply circuit to activate the battery for power supply even without a charger. This solution adds a battery activation method, allowing the battery to be activated using a rechargeable battery or connected to a load for power supply when no charger is available. This not only eliminates the dependence on a dedicated charger and expands application capabilities but also reduces costs and maintenance complexity.

[0085] In one embodiment, such as Figure 4 As shown, the first resistor module 201 includes a first resistor R1 and a second resistor R2. One end of the first resistor R1 serves as the first port of the first resistor module 201, and the other end of the first resistor R1 is connected to one end of the second resistor R2. The other end of the second resistor R2 serves as the second port of the first resistor module 201.

[0086] The activation circuit 3 includes:

[0087] A first switch module 301 and a third resistor module 302 are connected. The first port of the first switch module 301 serves as the input terminal of the activation circuit 3. The second port of the first switch module 301 is connected to the first port of the third resistor module 302. The second port of the third resistor module 302 serves as the output terminal of the activation circuit 3. The control port of the first switch module 301 is connected to the first resistor R1 and the second resistor R2.

[0088] The operation of the above power supply circuit is as follows:

[0089] Connect the receiving end of the charging circuit 4 to the battery, and connect the first power supply ends P+ and P- of the charging circuit 4 to the load respectively.

[0090] When the first detection terminal PRSE of the control circuit 1 detects a low-level signal, the control terminal L1 of the control circuit 1 sends a signal to the controlled terminal L2 of the charging circuit 4, causing the charging circuit 4 to be turned on;

[0091] The battery is powered by the second power supply terminal L3 of the charging circuit 4, and then charges the capacitor module 202 after passing through the first resistor R1 and the second resistor R2 of the charging circuit 2.

[0092] When the charging circuit 2 is charging, the input terminal of the charging circuit 2 is at a high level. After the control terminal of the first switch module 301 of the activation circuit 3 receives the high-level signal, it is turned on. After the signal passes through the first switch module 301 and the third resistor module 302, a high-level activation signal is output to the second detection terminal PACK of the control circuit 1.

[0093] When the second detection terminal PACK of control circuit 1 detects a high-level activation signal, the battery enters the running mode from the power-off mode and is activated.

[0094] When the capacitor module 202 of the charging circuit 2 is fully charged, the input terminal of the charging circuit 2 drops to a low level. After the control terminal of the first switch module 301 of the activation circuit 3 receives the low-level signal, it turns off, so that the activation circuit 3 no longer outputs the activation signal.

[0095] In this embodiment, a first resistor and a second resistor are configured in the first resistor module to charge the capacitor module. A first switch module and a third resistor module are configured in the activation circuit. When the charging circuit is charging, the first switch module is turned on, and the activation circuit outputs an activation signal to the control circuit. Upon receiving the activation signal, the control circuit switches the battery from the power-off mode to the operating mode, thus activating the battery. This allows the power supply circuit to activate the battery for power supply even without a charger. This solution adds a battery activation method, allowing the battery to be activated using a rechargeable battery or connected to a load for power supply when no charger is available. This not only eliminates the dependence on a dedicated charger and expands application capabilities but also reduces costs and maintenance complexity.

[0096] In one embodiment, such as Figure 4 As shown, the first switch module 301 includes a first switch transistor Q1. The input terminal of the first switch transistor Q1 serves as the first port of the first switch module 301, the output terminal of the first switch transistor Q1 serves as the second port of the first switch module 301, and the control terminal of the first switch transistor Q1 serves as the control port of the first switch module 301.

[0097] The operation of the above power supply circuit is as follows:

[0098] Connect the receiving end of the charging circuit 4 to the battery, and connect the first power supply ends P+ and P- of the charging circuit 4 to the load respectively.

[0099] When the first detection terminal PRSE of the control circuit 1 detects a low-level signal, the control terminal L1 of the control circuit 1 sends a signal to the controlled terminal L2 of the charging circuit 4, causing the charging circuit 4 to be turned on;

[0100] The battery is powered by the second power supply terminal L3 of the charging circuit 4, and then charges the capacitor module 202 after passing through the first resistor R1 and the second resistor R2 of the charging circuit 2.

[0101] When charging circuit 2 is charging, the input terminal of charging circuit 2 is at a high level. After receiving the high-level signal, the control terminal of the first switch Q1 of activation circuit 3 is turned on. After the signal passes through the first switch Q1 and the third resistor module 302, a high-level activation signal is output to the second detection terminal PACK of control circuit 1.

[0102] When the second detection terminal PACK of control circuit 1 detects a high-level activation signal, the battery enters the running mode from the power-off mode and is activated.

[0103] When the capacitor module 202 of the charging circuit 2 is fully charged, the input terminal of the charging circuit 2 is at a low level. After receiving the low-level signal, the control terminal of the first switch Q1 of the activation circuit 3 is turned off, and the activation circuit 3 no longer outputs the activation signal.

[0104] In this embodiment, a first switching transistor is set in the first switching module. By controlling the first switching transistor to conduct, the activation circuit outputs a high-level activation signal to activate the battery. After the battery is activated, the first switching transistor is turned off, and the activation circuit no longer outputs an activation signal, without increasing the battery's power consumption. This power supply circuit adds a battery activation method, allowing the battery to be activated using a rechargeable battery or connected to a load to activate the battery when no charger is available. This not only eliminates the dependence on a dedicated charger and expands application capabilities but also reduces costs and maintenance difficulty.

[0105] In one embodiment, such as Figure 1 As shown, a battery management system is provided, which includes the power supply circuit described above.

[0106] The working process of the above battery management system includes:

[0107] Connect the receiving end of the charging circuit 4 to the battery, and connect the first power supply ends P+ and P- of the charging circuit 4 to the load respectively.

[0108] When the first detection terminal PRSE of the control circuit 1 detects a low-level signal, the control terminal L1 of the control circuit 1 sends a signal to the controlled terminal L2 of the charging circuit 4, causing the charging circuit 4 to be turned on;

[0109] The battery is powered through the second power supply terminal L3 of the charging circuit 4, and the charging circuit 2 is charged through its input terminal.

[0110] When the charging circuit 2 is charging, the output terminal of the activation circuit 3 outputs a high-level activation signal to the second detection terminal PACK of the control circuit 1.

[0111] When the second detection terminal PACK of control circuit 1 detects a high-level activation signal, the battery enters the running mode from the power-off mode and is activated.

[0112] Once the charging circuit 2 is fully charged, the activation circuit 3 will no longer output an activation signal.

[0113] In this embodiment, by setting up a charging circuit, a control circuit, a charging circuit, and an activation circuit in the battery management system, the activation circuit outputs an activation signal to the control circuit when the charging circuit is charging. After receiving the activation signal, the control circuit switches the battery from the power-off mode to the operating mode, thus activating the battery. After the battery is fully activated, the activation circuit no longer outputs signals, and the power supply circuit does not increase its power consumption. This solution adds a battery activation method to the power supply circuit, allowing the battery to be activated using a rechargeable battery or connected to a load to activate the battery when no charger is available. This not only eliminates the dependence on a dedicated charger and expands application capabilities but also reduces costs and maintenance difficulty.

[0114] In one embodiment, such as Figure 5 As shown, the charging circuit 4 includes:

[0115] A positive charging branch 401 and a negative charging branch 402 are provided. The receiving end of the positive charging branch 401 is used to connect to the positive terminal of the battery, and the power supply end of the positive charging branch 401 is used to connect to the positive receiving end of the load. The receiving end of the negative charging branch 402 is used to connect to the negative terminal of the battery, and the power supply end of the negative charging branch 402 is used to connect to the negative receiving end of the load.

[0116] The positive charging branch 401 is provided with a second switch module 403, and the control terminal of the second switch module 403 serves as the controlled terminal in the charging circuit 4.

[0117] The working process of the above battery management system includes:

[0118] Connect the receiving end of the positive charging branch 401 to the positive terminal of the battery, and connect the receiving end of the negative charging circuit 402 to the negative terminal of the battery.

[0119] Connect the power supply terminal of the positive charging branch 401 to the positive receiving terminal of the load, and connect the power supply terminal of the negative charging branch 402 to the negative receiving terminal of the load.

[0120] When the first detection terminal PRSE of the control circuit 1 detects a low-level signal, the control terminal of the control circuit 1 sends a signal to the second switch module 403, and the second switch module 403 is turned on, thus turning on the charging circuit 4;

[0121] The battery is powered by the second power supply terminal L3 of the charging circuit 4, and the charging circuit 2 is charged through its input terminal;

[0122] When the charging circuit 2 is charging, the output terminal of the activation circuit 3 outputs a high-level activation signal to the second detection terminal PACK of the control circuit 1.

[0123] When the second detection terminal PACK of control circuit 1 detects a high-level activation signal, the battery enters the running mode from the power-off mode and is activated.

[0124] Once the charging circuit 2 is fully charged, the activation circuit 3 will no longer output an activation signal.

[0125] In this embodiment, the control circuit controls the second switch module to conduct, thus activating the entire charging circuit. While charging the charging circuit, the activation circuit outputs an activation signal to the control circuit. Upon receiving the activation signal, the control circuit switches the battery from shutdown mode to operating mode, completing battery activation. This allows the power supply circuit to activate the battery for power supply even without a charger. This solution adds several battery activation methods, allowing the battery to be activated using a rechargeable battery or connected to a load for power supply when no charger is available. This not only eliminates the reliance on a dedicated charger, expanding application capabilities, but also reduces costs and maintenance complexity.

[0126] In one embodiment, such as Figure 5 As shown, the second switch module 403 includes a second switch Q2 and a third switch Q3. The input terminal of the second switch Q2 is used to input the power supply signal output from the positive terminal of the battery. The output terminal of the second switch Q2 is connected to the input terminal of the third switch Q3. The output terminal of the third switch Q3 serves as the power supply terminal of the positive charging branch 401. The control terminal of the second switch Q2 is connected to the first control terminal of the control circuit 1, and the control terminal of the third switch Q3 is connected to the second control terminal of the control circuit 1.

[0127] In this example, two switching transistors, Q2 and Q3, are set in the second switching module 403. Therefore, the control circuit 1 needs to bring out two control terminals. The first control terminal controls the second switching transistor Q2, and the second control terminal controls the third switching transistor Q3. Alternatively, only one switching transistor can be set in the second switching module 403, and only one control terminal can be set in the control circuit 1 for control. The adjustment can be made as needed.

[0128] like Figure 6 As shown, a fourth resistor module is also provided in the control circuit 1, including resistor R5. When the user selects to activate the battery using a charger, the IC in the control circuit 1 detects the voltage of the P+ terminal through the PACK terminal. When a charger is detected, the P+ terminal is at a high level, which activates the battery.

[0129] The working process of the above battery management system includes:

[0130] Connect the receiving end of the positive charging branch 401 to the positive terminal of the battery, and connect the receiving end of the negative charging circuit 402 to the negative terminal of the battery.

[0131] Connect the power supply terminal of the positive charging branch 401 to the positive receiving terminal of the load, and connect the power supply terminal of the negative charging branch 402 to the negative receiving terminal of the load.

[0132] When the first detection terminal PRSE of control circuit 1 detects a low-level signal, the control terminal of control circuit 1 sends a signal to the control terminals of the second switch Q2 and the third switch Q3, turning on the second switch Q2 and the third switch Q3, thus turning on the charging circuit 4;

[0133] The battery is powered by the second power supply terminal L3 of the charging circuit 4, and the charging circuit 2 is charged through its charging terminal.

[0134] When the charging circuit 2 is charging, the output terminal of the activation circuit 3 outputs a high-level activation signal to the second detection terminal PACK of the control circuit 1.

[0135] When the second detection terminal PACK of control circuit 1 detects a high-level activation signal, the battery enters the running mode from the power-off mode and is activated.

[0136] Once the charging circuit 2 is fully charged, the activation circuit 3 will no longer output an activation signal.

[0137] In this embodiment, the control circuit controls the second and third switching transistors to conduct, thus activating the entire charging circuit. When charging the charging circuit, the activation circuit outputs an activation signal to the control circuit. Upon receiving the activation signal, the control circuit switches the battery from shutdown mode to operating mode, completing the battery activation. This allows the power supply circuit to activate the battery for power supply even without a charger. This solution adds several battery activation methods, allowing the battery to be activated using a rechargeable battery or connected to a load for power supply when no charger is available. This not only eliminates the reliance on a dedicated charger, expanding application capabilities, but also reduces costs and maintenance complexity.

[0138] In one embodiment, an electronic device is provided, the electronic device including the power supply circuit described above, or the battery management system described above.

[0139] The working process of the aforementioned electronic equipment is as follows:

[0140] Connect the receiving end of the charging circuit to the battery, and connect the first power supply end of the charging circuit to the load respectively.

[0141] When the first detection terminal of the control circuit detects a low-level signal, the control terminal of the control circuit sends a signal to the controlled terminal of the charging circuit, causing the charging circuit to conduct.

[0142] The battery is powered through the second power supply terminal of the charging circuit, and the charging circuit is charged through its charging terminal.

[0143] When the charging circuit is charging, the output terminal of the activation circuit outputs a high-level activation signal to the second detection terminal of the control circuit;

[0144] When the second detection terminal of the control circuit detects a high-level activation signal, the battery enters the running mode from the power-off mode and is activated.

[0145] Once the charging circuit is fully charged, the activation circuit will no longer output an activation signal.

[0146] In this embodiment, a control circuit, an activation circuit, a charging circuit, and a charging loop are provided in the electronic device. When the charging circuit is charging, the activation circuit outputs an activation signal to the control circuit. Upon receiving the activation signal, the control circuit switches the battery from the power-off mode to the operating mode, thus activating the battery. This allows the power supply circuit to activate the battery for power supply even without a charger. This solution adds several battery activation methods to the power supply circuit. It can use a rechargeable battery to activate the battery for power supply, or connect a load to activate the battery for power supply when no charger is available. This not only eliminates the dependence on a dedicated charger and expands application capabilities, but also reduces costs and maintenance complexity.

[0147] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model, and should all be included within the protection scope of this utility model.

Claims

1. A power supply circuit, characterized in that, The power supply circuit includes: A charging circuit, wherein the receiving end of the charging circuit is used to connect to the battery, and the first power supply end of the charging circuit is used to connect to the receiving end of the load; A control circuit, wherein the first detection terminal of the control circuit is connected to the enable terminal of the load, and the control terminal of the control circuit is connected to the controlled terminal in the charging circuit; A charging circuit, wherein the input terminal of the charging circuit is connected to the second power supply terminal of the charging circuit, and the output terminal of the charging circuit is connected to the first detection terminal of the control circuit; the charging circuit is used to charge when the first detection terminal receives a low-level signal. An activation circuit is provided, wherein the input terminal of the activation circuit is connected to the second power supply terminal of the charging circuit, and the output terminal of the activation circuit is connected to the second detection terminal of the control circuit. The activation circuit is used to conduct during the charging process of the charging circuit and output an activation signal to the second detection terminal of the control circuit.

2. The power supply circuit according to claim 1, characterized in that, The charging circuit includes: A first resistor module and a capacitor module are provided. The first port of the first resistor module serves as the input terminal of the charging circuit. The second port of the first resistor module is connected to the first port of the capacitor module, and the second port of the capacitor module serves as the output terminal of the charging circuit.

3. The power supply circuit according to claim 2, characterized in that, The charging circuit also includes: The second resistor module has its first port connected to the first port of the capacitor module, and its second port connected to the second port of the capacitor module.

4. The power supply circuit according to claim 1, characterized in that, The activation circuit includes: A first switch module and a third resistor module are used. The first port of the first switch module serves as the input terminal of the activation circuit. The second port of the first switch module is connected to the first port of the third resistor module. The second port of the third resistor module serves as the output terminal of the activation circuit. The control port of the first switch module is connected to the input terminal of the charging circuit.

5. The power supply circuit according to claim 2, characterized in that, The first resistor module includes a first resistor and a second resistor. One end of the first resistor serves as a first port of the first resistor module, and the other end of the first resistor is connected to one end of the second resistor. The other end of the second resistor serves as a second port of the first resistor module. The activation circuit includes: A first switch module and a third resistor module are connected. The first port of the first switch module serves as the input terminal of the activation circuit. The second port of the first switch module is connected to the first port of the third resistor module. The second port of the third resistor module serves as the output terminal of the activation circuit. The control port of the first switch module is connected to the first resistor and the second resistor.

6. The power supply circuit according to claim 4 or 5, characterized in that, The first switch module includes a first switch transistor, the input terminal of the first switch transistor serves as the first port of the first switch module, the output terminal of the first switch transistor serves as the second port of the first switch module, and the control terminal of the first switch transistor serves as the control port of the first switch module.

7. A battery management system, characterized in that, The battery management system includes the power supply circuit as described in any one of claims 1 to 6.

8. The battery management system according to claim 7, characterized in that, The charging circuit includes: A positive charging branch and a negative charging branch are provided. The receiving end of the positive charging branch is used to connect to the positive terminal of the battery, and the power supply end of the positive charging branch is used to connect to the positive receiving end of the load. The receiving end of the negative charging branch is used to connect to the negative terminal of the battery, and the power supply end of the negative charging branch is used to connect to the negative receiving end of the load. The positive charging branch is provided with a second switch module, and the control terminal of the second switch module serves as the controlled terminal in the charging circuit.

9. The battery management system according to claim 8, characterized in that, The second switching module includes a second switching transistor and a third switching transistor. The input terminal of the second switching transistor is used to input the power supply signal output from the positive terminal of the battery. The output terminal of the second switching transistor is connected to the input terminal of the third switching transistor, and the output terminal of the third switching transistor serves as the power supply terminal of the positive charging branch. The control terminal of the second switching transistor is connected to the first control terminal of the control circuit, and the control terminal of the third switching transistor is connected to the second control terminal of the control circuit.

10. An electronic device, characterized in that, The electronic device includes a power supply circuit as described in any one of claims 1 to 6, or a battery management system as described in any one of claims 7 to 9.

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