Key activation circuit and energy storage device

Abstract

The invention relates to a key activation circuit and energy storage equipment. The key activation circuit comprises a key switch module and an activation module, the key switch module and the activation module are sequentially connected in series between the power supply and the battery management system, and the activation module is also used for connecting the power supply; the key switch module outputs a first electric signal in a pressed state; the activation module is used for outputting a primary activation signal to the battery management system based on the power supply voltage of the power supply under the condition that the signal of the output end of the key switch module jumps into the first electric signal. By adopting the activation circuit, the problem that the battery management system cannot be normally shut down or frequently started and stopped due to continuous pressing of the key in the scenes such as transportation which are easy to touch by mistake can be effectively avoided.

Description

Technical Field

[0001] The present application relates to the field of energy storage technology, and in particular to a key activation circuit and an energy storage device. Background Art

[0002] With the rapid development of energy storage product technology and its widespread application in daily life, especially as smart home appliances that meet most user needs, product designs include a variety of activation methods for battery management systems, such as AC activation, photovoltaic power supply voltage activation, and button activation.

[0003] In traditional technology, a common design is to activate the battery management system by generating a level signal through a conversion circuit when a button is pressed. However, the circuit design of the above button activation method is relatively simple and lacks stability. In scenarios such as the transportation of energy storage products, once the button is accidentally touched and is in a continuous pressing state, it will cause the battery management system to start and stop frequently or be unable to power off, resulting in power loss of the energy storage product. Summary of the invention

[0004] Based on this, it is necessary to provide a key activation circuit and an energy storage device.

[0005] In a first aspect, the present application provides a key activation circuit, comprising: a key switch module and an activation module; the key switch module and the activation module are sequentially connected in series between a power supply and a battery management system, and the activation module is also used to connect to the power supply;

[0006] The key switch module outputs a first electrical signal when being pressed;

[0007] The activation module is used to output an activation signal to the battery management system based on the power supply voltage of the power supply when the signal at the output end of the key switch module jumps to the first electrical signal.

[0008] In one embodiment, the activation module is used to output an activation signal when the signal received from the key switch module jumps to a first electrical signal and the duration of the first electrical signal is within a preset time range.

[0009] In one embodiment, the activation module includes a time window unit and a signal output unit which are sequentially connected in series between the key switch module and the battery management system, and the power supply end of the signal output unit is used to connect to a power supply;

[0010] The time window unit is used to receive a first electrical signal, and output a second electrical signal when the duration of the first electrical signal is within a preset time range, so that the signal output unit outputs an activation signal based on the power supply voltage of the power supply.

[0011] In one of the embodiments, the activation module further includes a switch unit connected in series between the time window unit and the signal output unit;

[0012] The switch unit is used to output a third electrical signal to the signal output unit when the voltage value of the second electrical signal is greater than a preset conduction voltage threshold, so that the signal output unit outputs an activation signal.

[0013] In one of the embodiments, the time window unit includes: a switch circuit, a first charge-discharge circuit, and a second charge-discharge circuit;

[0014] The input end of the switch circuit is connected to the output end of the key switch module, the first output end of the switch circuit is connected to the input end of the first charge and discharge circuit, the second output end of the switch circuit is connected to the input end of the second charge and discharge circuit, the discharge controlled end of the first charge and discharge circuit is connected to the output end of the key switch module, and the output end of the second charge and discharge circuit is connected to the input end of the signal output unit;

[0015] The switch circuit is turned on when the voltage difference between the input terminal of the switch circuit and the first output terminal meets the conduction condition, and charges the first charge-discharge circuit and the second charge-discharge circuit, so that the second charge-discharge circuit outputs a second electrical signal;

[0016] When the voltage difference does not satisfy the conduction condition, the switch circuit is turned off to discharge the first charge-discharge circuit and the second charge-discharge circuit.

[0017] In one embodiment, the switch circuit includes: a switch tube Q1; the emitter of the switch tube Q1 is connected to the output end of the key switch module, the base of the switch tube Q1 is connected to the input end of the first charge and discharge circuit, and the collector of the switch tube Q1 is connected to the input end of the second charge and discharge circuit; and / or,

[0018] The first charge and discharge circuit includes: a resistor R3, a capacitor C1, a diode D1 and a resistor R2; the resistor R3, the anode of the diode D1, the cathode of the diode D1 and the resistor R2 are sequentially connected in series between the first output terminal of the switch circuit and the ground terminal, the cathode of the diode D1 is also connected to the output terminal of the key switch module, and the capacitor C1 is connected in parallel with the resistor R2; and / or,

[0019] The second charge and discharge circuit includes: a capacitor C2 and a resistor R3; a first end of the capacitor C2 is connected to the second output end of the switch circuit, a second end of the capacitor C2 is grounded, and the resistor R3 is connected in parallel with the capacitor C2.

[0020] In one embodiment, the signal output unit includes: a switch tube Q2 and a switch tube Q3;

[0021] The emitter of the switch tube Q2 is used to connect to the power supply, the collector of the switch tube Q2 is used to connect to the battery management system, and the base of the switch tube Q2 is connected to the collector of the switch tube Q3;

[0022] The base of the switch tube Q3 is connected to the output end of the time window unit, and the emitter of the switch tube Q3 is grounded.

[0023] In one embodiment, the switch unit includes: a voltage stabilizing diode ZD1, a resistor R5 and a capacitor C3;

[0024] The cathode of the Zener diode ZD1 is connected to the output end of the time window unit, the anode of the Zener diode ZD1 is connected to the first end of the resistor R5, the second end of the resistor R5 is respectively connected to the first end of the capacitor C3 and the input end of the signal output unit, and the second end of the capacitor C3 is grounded.

[0025] In one embodiment, the key switch module includes: a resistor R1 and a key switch SW1;

[0026] The first end of the resistor R1 is used to connect to the power supply, the second end of the resistor R1 is connected to the first end of the key switch SW1, and the second end of the key switch SW1 is connected to the activation module.

[0027] In a second aspect, the present application further provides an energy storage device, the energy storage device comprising:

[0028] Power supply;

[0029] Battery management system; and,

[0030] Such as the key activation circuit in the above embodiment.

[0031] The above-mentioned key activation circuit and energy storage device have at least the following beneficial effects:

[0032] By introducing an activation module to process the output signal of the key switch module, it is ensured that even if the key is continuously pressed, the battery management system is only activated once. This effectively avoids the problem of the battery management system being unable to shut down normally or frequently starting and stopping due to continuous pressing of the key in scenarios prone to accidental touches such as transportation, thereby significantly reducing unnecessary energy consumption and improving the energy efficiency and stability of the energy storage equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0034] FIG1 is a schematic diagram of a key activation circuit according to an embodiment of the present invention;

[0035] FIG2 is a second schematic diagram of the structure of a key activation circuit in one embodiment;

[0036] FIG3 is a third structural diagram of a key activation circuit in one embodiment;

[0037] FIG4 is a fourth structural diagram of a key activation circuit in one embodiment;

[0038] FIG5 is a fifth structural diagram of a key activation circuit in one embodiment;

[0039] FIG6 is a sixth structural diagram of a key activation circuit in one embodiment;

[0040] FIG7 is a seventh structural diagram of a key activation circuit in one embodiment;

[0041] FIG8 is an eighth structural diagram of a key activation circuit in one embodiment;

[0042] FIG. 9 is a ninth structural diagram of a key activation circuit in one embodiment. DETAILED DESCRIPTION

[0043] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0045] It is understood that the terms "first", "second", etc. used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish a first element from another element. For example, without departing from the scope of this application, a first resistor may be referred to as a second resistor, and similarly, a second resistor may be referred to as a first resistor. Both the first resistor and the second resistor are resistors, but they are not the same resistor.

[0046] It can be understood that the “connection” in the following embodiments should be understood as “electrical connection”, “communication connection”, etc. if the connected circuits, modules, units, etc. have electrical signals or data transmission between each other.

[0047] It can be understood that “at least one” means one or more, “plurality” means two or more, and “at least a portion of an element” means a part or all of an element.

[0048] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" and the like specify the presence of stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. At the same time, the term "and / or" used in this specification includes any and all combinations of the relevant listed items.

[0049] In an exemplary embodiment, as shown in FIG1 , the present application provides a key activation circuit, including a key switch module 2 and an activation module 4. The key switch module 2 and the activation module 4 are connected in series between the power supply 300 and the battery management system 500, and the activation module 4 is also used to connect the power supply 300; the key switch module 2 outputs a first electrical signal when pressed; the activation module 4 is used to output an activation signal to the battery management system 500 based on the power supply voltage of the power supply 300 when the signal at the output end of the key switch module 2 jumps to the first electrical signal.

[0050] The key switch module 2 is used to detect the user's physical operation (i.e., whether the key is pressed), and output a first electrical signal when it is detected that the key (e.g., the activation key of the energy storage device) is pressed. The key switch module 2 can be composed of a mechanical key and related electronic components (e.g., resistors, capacitors, etc.). The mechanical key can be a simple spring-type button. When the user presses the button, the two metal contact points are closed to form a closed circuit. When the key is closed, a first electrical signal (e.g., a high-level signal) is output.

[0051] For example, in the transportation scenario of energy storage equipment, the activation button of the energy storage equipment may be kept in a pressed state due to problems such as bumps. For some energy storage devices that will activate the battery management system 500 as long as the activation button is pressed, the activation button is kept in a pressed state, the activation signal will always exist, and the battery management system 500 cannot be shut down and powered off, which will continue to consume the energy of the energy storage device itself and cause unnecessary waste. For some other energy storage devices, when the activation button is kept in a pressed state, the battery management system 500 may be frequently started and stopped, which will also continuously consume the energy of the energy storage device itself and cause unnecessary waste.

[0052] Based on the above reasons, a key activation circuit is proposed, including a key switch module 2 and an activation module 4. The activation module 4 is connected to the key switch module 2, and can continuously monitor the change of the signal output by the key switch module 2. When the key switch module 2 is not pressed, the signal output by the key switch module 2 remains unchanged, for example, it is always a low-level signal or always a high-level signal; when the key switch module 2 is pressed, the key switch module 2 generates a first electrical signal, and the first electrical signal can also be a high level or a low level, depending on the circuit design. When the signal received by the activation module 4 from the key switch module 2 jumps to the first electrical signal, for example, it jumps from a low-level signal to a high-level signal, or from a high-level signal to a low-level signal, it indicates that the key switch module 2 is in a pressed state at this time, and the activation operation of the battery management system 500 needs to be performed. When the signal output by the key switch module 2 jumps to the first electrical signal, the activation module 4 outputs an activation signal to the battery management system 500. That is to say, after the signal output by the key switch module 2 jumps to the first electrical signal, even if the key switch module 2 is in a continuously pressed state, the key switch module 2 always outputs the first electrical signal. During this period, the activation module 4 only outputs an activation signal to the battery management system 500 once, and performs an activation operation on the battery management system 500 to avoid problems such as the battery management system 500 being unable to shut down or power off or frequently starting and stopping, thereby reducing the energy consumption of the energy storage device.

[0053] The above-mentioned button activation circuit and energy storage device introduce an activation module to process the output signal of the button switch module, ensuring that even when the button is continuously pressed, the battery management system is only activated once, effectively avoiding the problem of the battery management system being unable to shut down normally or frequently starting and stopping due to continuous button pressing in scenarios prone to accidental touches such as transportation, thereby significantly reducing unnecessary energy consumption and improving the energy efficiency and stability of the energy storage device.

[0054] In an exemplary embodiment, the power supply 300 may be a power supply provided by a battery module in an energy storage device. For another example, the power supply 300 may be another power supply other than a battery module.

[0055] In an exemplary embodiment, the activation module 4 is configured to output an activation signal when the signal received from the key switch module 2 changes to a first electrical signal and the duration of the first electrical signal is within a preset time range.

[0056] The preset time range refers to a time period during which the activation module 4 waits to confirm the duration of the first electrical signal output by the key switch module 2 after detecting the first electrical signal output by the key switch module 2. This time period is to ensure that the key operation is intentional by the user and not an accidental touch. When the duration of the first electrical signal falls within this preset time range, the activation module 4 will determine that this is a valid activation request and output an activation signal to the battery management system 500 accordingly.

[0057] Exemplarily, when the signal received by the activation module 4 from the key switch module 2 jumps to a first electrical signal, the activation module 4 simultaneously detects the duration of the first electrical signal to confirm whether the duration of the first electrical signal is within a preset time range, and outputs an activation signal when the duration of the first electrical signal is within the preset time range to avoid unexpected activation due to a brief false touch or continuous pressing, thereby effectively reducing the power loss of the energy storage device and improving the stability of the system.

[0058] In an exemplary embodiment, as shown in Figure 2, the activation module 4 includes a time window unit 42 and a signal output unit 44 which are connected in series between the key switch module 2 and the battery management system 500, and the power supply end of the signal output unit 44 is used to connect to the power supply 300; the time window unit 42 is used to receive a first electrical signal, and output a second electrical signal when the duration of the first electrical signal is within a preset time range, so that the signal output unit 44 outputs an activation signal based on the power supply voltage of the power supply 300.

[0059] The time window unit 42 may refer to a logic unit with a timing function, and may be a timer circuit or a comparator circuit.

[0060] Exemplarily, when the key switch module 2 is pressed, the time window unit 42 receives a first electrical signal from the key switch module 2 and starts timing. When the duration of the first electrical signal falls within a preset time range, the time window unit 42 considers this to be a valid activation request and outputs a second electrical signal. Subsequently, the signal output unit 44 receives the second electrical signal and outputs an activation signal to the battery management system 500. In this way, regardless of whether the key is continuously pressed or due to a brief false touch, the activation signal is only output once within the preset time range, thereby avoiding multiple activations caused by continuous pressing or unnecessary activations due to brief false touches, and effectively reducing unnecessary power consumption.

[0061] In an exemplary embodiment, as shown in FIG3 , the activation module 4 further includes a switch unit 46 connected in series between the time window unit 42 and the signal output unit 44; the switch unit 46 is used to output a third electrical signal to the signal output unit 44 when the voltage value of the second electrical signal is greater than a preset conduction voltage threshold, so that the signal output unit 44 outputs an activation signal.

[0062] It should be noted that the time window unit 42 can also output a second electrical signal with different voltage values ​​according to the duration of the first electrical signal, that is, the output voltage value is positively correlated with the duration. It should be emphasized that in actual circuit implementation, the voltage value of the second electrical signal output by the time window unit 42 has a certain upper threshold value. When the upper threshold value is reached, even if the duration of the first electrical signal is increasing, the voltage value of the second electrical signal will not exceed the upper threshold value.

[0063] Exemplarily, when the duration of the first electrical signal is less than the lower limit of the preset time range, the voltage value of the second electrical signal is very small (close to zero), and it can be considered that no second electrical signal is output. When the duration of the first electrical signal is within the preset time range, the second electrical signal is output, and the voltage value of the second electrical signal gradually increases with time until it is greater than the preset conduction voltage threshold. At this time, the switch unit 46 outputs a third electrical signal to the signal output unit 44, so that the signal output unit 44 outputs an activation signal.

[0064] In this embodiment, the switch unit ensures that even when the button is continuously pressed, the third electrical signal is output only when the signal strength is strong enough, so that the signal output unit only outputs the activation signal once. This not only avoids unexpected activation due to brief false touches, but also ensures that even when the button is continuously pressed, the system only performs an activation operation once, thereby effectively reducing unnecessary power consumption and improving the overall stability and efficiency of the system.

[0065] In an exemplary embodiment, as shown in FIG4 , the time window unit 42 includes a switch circuit 422, a first charge-discharge circuit 424, and a second charge-discharge circuit 426. The input end of the switch circuit 422 is connected to the output end of the key switch module 2, the first output end of the switch circuit 422 is connected to the input end of the first charge-discharge circuit 424, the second output end of the switch circuit 422 is connected to the input end of the second charge-discharge circuit 426, the discharge controlled end of the first charge-discharge circuit 424 is connected to the output end of the key switch module 2, and the output end of the second charge-discharge circuit 426 is connected to the input end of the signal output unit 44; the switch circuit 422 is turned on when the voltage difference between the input end and the first output end of the switch circuit 422 meets the conduction condition, and charges the first charge-discharge circuit 424 and the second charge-discharge circuit 426, so that the second charge-discharge circuit 426 outputs the second electrical signal; the switch circuit 422 is turned off when the voltage difference does not meet the conduction condition, so that the first charge-discharge circuit 424 and the second charge-discharge circuit 426 discharge.

[0066] The conduction condition may refer to that the voltage difference between the input terminal and the first output terminal of the switch circuit 422 is greater than a preset voltage threshold. The specific preset voltage threshold may be set according to the actual circuit design and is not limited here.

[0067] Exemplarily, when the key switch module 2 is pressed, the key switch module 2 outputs a first electrical signal to the input end of the switch circuit 422, and at this time, the first electrical signal pulls up the potential of the input end of the switch circuit 422; and before the first electrical signal is connected, the first charge and discharge circuit 424 has not been charged, and the potential of the first charge and discharge circuit 424 is low (close to zero), and the first charge and discharge circuit 424 pulls down the potential of the first output end of the switch circuit 422 (close to zero). Therefore, when the key switch module 2 is just in the pressed state and outputs the first electrical signal, the voltage difference between the input end and the first output end of the switch circuit 422 satisfies the conduction condition, so that the switch circuit 422 is turned on, and the first electrical signal charges the first charge and discharge circuit 424 and the second charge and discharge circuit 426 through the switch circuit 422. When the duration of the first electrical signal is less than the lower limit of the preset time range (i.e., the charging time of the second charge and discharge circuit 426 is less than the lower limit of the preset time range), the voltage value of the second charge and discharge circuit 426 is very small (close to zero). At this time, it can be considered that there is no second charge and discharge circuit 426 and no second electrical signal output, thereby avoiding unnecessary activation operations caused by brief false touches; when the duration of the first electrical signal is within the preset time, (i.e., the charging time of the second charge and discharge circuit 426 is within the preset time range), the voltage value of the second charge and discharge circuit 426 gradually increases within the preset time range. When the voltage value reaches a certain value, the second electrical signal starts to be output to the signal output unit 44, so that the signal output unit 44 outputs an activation signal to the battery management system 500.

[0068] When the first charge and discharge circuit 424 completes charging, since the voltage provided to the first output terminal of the switch circuit 422 by the first charge and discharge circuit 424 is equal to the voltage of the input terminal of the switch circuit 422 (that is, the voltage of the input terminal of the switch circuit 422 and the voltage of the first output terminal are both the voltages provided by the first electrical signal), the switch circuit 422 is cut off because the voltage difference between its input terminal and the first output terminal cannot meet the conduction condition, and the second charge and discharge circuit 426 starts to discharge, and the voltage gradually decreases until the output of the second electrical signal stops.

[0069] In the case where the key switch module 2 is continuously pressed, since the discharge controlled end of the first charge and discharge circuit 424 is connected to the output end of the key switch module 2, the voltage of the discharge controlled end of the first charge and discharge circuit 424 is equal to the voltage provided by the first electrical signal output by the key switch module 2. Therefore, the first charge and discharge circuit 424 cannot discharge and still maintains the voltage provided by the first electrical signal, keeping the switch circuit 422 in the cut-off state, and the second charge and discharge circuit 426 cannot charge and cannot output the second electrical signal to the signal output unit 44. This ensures that even if the key switch module 2 is continuously pressed and the first electrical signal is continuously output, the battery management system 500 is only activated once, effectively avoiding the problem that the battery management system 500 cannot be shut down normally or is frequently started and stopped due to continuous key pressing in scenes where accidental touches are prone to occur, such as transportation.

[0070] When the key switch module 2 is reset (non-pressed state), the first electrical signal stops being outputted. At this time, the voltage at the discharge controlled end of the first charge and discharge circuit 424 is zero, and the first charge and discharge circuit 424 starts to discharge until the voltage of the first charge and discharge circuit 424 drops to be equal to the voltage at the discharge controlled end of the first charge and discharge circuit 424, so that when the key switch module 2 is pressed next time, the switch circuit 422 can be turned on again to charge the second charge and discharge circuit 426 to output the second electrical signal.

[0071] In this embodiment, by introducing a structure consisting of a switching circuit, a first charging and discharging circuit and a second charging and discharging circuit, it is ensured that an activation signal is output to the battery management system only when the button is pressed for a preset time range. This not only avoids unexpected activation due to a brief false touch, but also ensures that even if the button is continuously pressed, the system will only perform an activation operation once, thereby effectively reducing unnecessary power consumption and improving the stability and energy efficiency of the energy storage device.

[0072] In an exemplary embodiment, as shown in FIG5 , the switch circuit 422 includes: a switch tube Q1; the emitter of the switch tube Q1 is connected to the output end of the key switch module 2, the base of the switch tube Q1 is connected to the input end of the first charge and discharge circuit 424, and the collector of the switch tube Q1 is connected to the input end of the second charge and discharge circuit 426; and / or, the first charge and discharge circuit 424 includes: a resistor R3, a capacitor C1, a diode D1 and a resistor R2; the resistor R3, the anode of the diode D1, the cathode of the diode D1 and the resistor R2 are sequentially connected in series between the first output end and the ground end of the switch circuit 422, the cathode of the diode D1 is also connected to the output end of the key switch module 2, and the capacitor C1 is connected in parallel with the resistor R2; and / or, the second charge and discharge circuit 426 includes: a capacitor C2 and a resistor R3; the first end of the capacitor C2 is connected to the second output end of the switch circuit 422, the second end of the capacitor C2 is grounded, and the resistor R3 is connected in parallel with the capacitor C2.

[0073] The switch tube Q1 may be a PNP transistor.

[0074] Exemplarily, when the key switch module 2 is pressed, the key switch module 2 outputs a first electrical signal to the emitter of the switch tube Q1. At this time, the first electrical signal pulls up the potential of the emitter of the switch tube Q1. Before the first electrical signal is connected, the capacitor C1 has not been charged, and the potential of the capacitor C1 is low (close to zero). The capacitor C1 and the resistor R3 pull down the potential of the base of the switch tube Q1 (close to zero). Therefore, when the key switch module 2 is just in the pressed state and outputs the first electrical signal, the voltage difference between the emitter and the base of the switch tube Q1 satisfies the conduction condition, so that the switch tube Q1 is turned on, and the first electrical signal charges the capacitor C1 through the emitter and base of the switch tube Q1 and the resistor R3, and charges the capacitor C2 through the emitter and collector of the switch tube Q1. When the duration of the first electrical signal is less than the lower limit of the preset time range (i.e., the charging time of capacitor C2 is less than the lower limit of the preset time range), the voltage value of capacitor C2 is very small (close to zero), and it can be considered that capacitor C2 has no second electrical signal output at this time, thereby avoiding unnecessary activation operations caused by brief false touches; when the duration of the first electrical signal is within the preset time range (i.e., the charging time of capacitor C2 is within the preset time range), the voltage value of capacitor C2 gradually increases within the preset time range, and when the voltage value reaches a certain value, the second electrical signal starts to be output to the signal output unit 44, so that the signal output unit 44 outputs an activation signal to the battery management system 500.

[0075] When the capacitor C1 is fully charged, the voltage provided to the base of the switch tube Q1 by the capacitor C1 and the resistor R3 is equal to the voltage of the emitter of the switch tube Q1 (that is, the voltages of the emitter and the base of the switch tube Q1 are both the voltages provided by the first electrical signal). At this time, the switch tube Q1 is turned off because the voltage difference between its emitter and base cannot meet the turn-on condition, and the capacitor C2 starts to discharge through the resistor R4, and the voltage gradually decreases until the second electrical signal stops being output.

[0076] In the case where the key switch module 2 is in a continuously pressed state and the key switch module 2 continuously outputs the first electrical signal, since the cathode of the diode D1 is still connected to the output end of the key switch module 2, the potential of the cathode of the diode D1 is pulled up by the first electrical signal output by the key switch module 2 (i.e., the potential of the cathode of the diode D1 is equal to the potential of the output end of the key switch module 2). After the capacitor C1 is charged, the voltage of the capacitor C1 is equal to the voltage provided by the first electrical signal, the switch tube Q1 is in a cut-off state, and the potential of the anode of the diode D1 is equal to the potential of the capacitor C1 after charging, so the potential of the anode of the diode D1 is also equal to the potential of the output end of the key switch module 2. At this time, the capacitor C1 cannot be discharged through the resistor R2, and the voltage is still maintained at the voltage provided by the first electrical signal, keeping the switch tube Q1 in a cut-off state, the capacitor C2 cannot be charged, and the second electrical signal cannot be output to the signal output unit 44. This ensures that even when the key switch module 2 is continuously pressed and the first electrical signal is continuously output, the battery management system 500 is only activated once (i.e., when the signal at the output end of the key switch module 2 jumps to the first electrical signal, the activation signal is only output once to the battery management system 500), effectively avoiding the problem of the battery management system 500 being unable to shut down normally or being frequently started and stopped due to continuous pressing of the key in scenarios prone to accidental touches such as transportation.

[0077] When the key switch module 2 is reset (non-pressed state), the first electrical signal stops being outputted. At this time, the potential of the cathode of the diode D1 is pulled to the ground by the resistor R2, and the potential of the anode of the diode D1 is greater than the potential of the cathode of the diode D1. The capacitor C1 starts to discharge until the voltage of the capacitor C1 gradually drops to close to zero, so that when the key switch module 2 is pressed next time, the switch tube Q1 can be turned on again to charge the capacitor C2 to output the second electrical signal, so that the signal output unit 44 activates the battery management system 500 again.

[0078] In this embodiment, a specific and feasible structure is provided for the implementation of the switching circuit, the first charging and discharging circuit and the second charging and discharging circuit, which ensures that an activation signal is output to the battery management system only when the button is pressed for a preset time range. This not only avoids unexpected activation due to a brief false touch, but also ensures that even if the button is continuously pressed, only one activation operation will be performed, thereby effectively reducing unnecessary power consumption and improving the stability and energy efficiency of the energy storage device.

[0079] In an exemplary embodiment, as shown in Fig. 6, the signal output unit 44 includes a switch tube Q2 and a switch tube Q3. The emitter of the switch tube Q2 is used to connect to the power supply 300, the collector of the switch tube Q2 is used to connect to the battery management system 500, the base of the switch tube Q2 is connected to the collector of the switch tube Q3; the base of the switch tube Q3 is connected to the output end of the time window unit 42, and the emitter of the switch tube Q3 is grounded.

[0080] The switch tube Q2 may be a PNP transistor, and the switch tube Q3 may be an NPN transistor. To meet the circuit design requirements, the signal output unit 44 further includes a resistor R7 and a resistor R6, and the specific connection relationship can be shown in FIG. 6, which will not be repeated here.

[0081] Exemplarily, when the key switch module 2 is pressed, the time window unit 42 receives the first electrical signal from the key switch module 2 and starts timing. When the duration of the first electrical signal falls within the preset time range, the time window unit 42 will consider this to be a valid activation request and output a second electrical signal. The potential of the base of the switch tube Q3 is pulled up by the second electrical signal through the resistor R6, the switch tube Q3 is turned on, the potential of the base of the switch tube Q2 is pulled to the ground through the resistor R7 and the switch tube Q3, and the emitter of the switch tube Q2 is under the action of the power supply voltage BAT+ of the power supply 300, so that the circuit between the power supply 300 and the battery management system 500 is turned on, so that the power supply 300 supplies power to the battery management system 500 (that is, based on the power supply voltage BAT+ of the power supply 300, the activation signal SW_WAKE is output to the battery management system 500), and the battery management system 500 is powered on. When the time window unit 42 stops outputting the second electrical signal, the switch tube Q3 is turned off, and the switch tube Q2 is also turned off. The circuit between the power supply 300 and the battery management system 500 is disconnected, and the power supply 300 cannot supply power to the battery management system 500 (that is, it cannot output the activation signal SW_WAKE to the battery management system 500 based on the power supply voltage BAT+ of the power supply 300), and the battery management system 500 is powered off and shut down.

[0082] In this embodiment, a signal output unit including switch tubes Q2 and Q3 is designed. When the time window unit detects a valid activation request and outputs a second electrical signal, the conduction and cutoff of the switch tube Q3 are controlled, thereby controlling the conduction state of the switch tube Q2, thereby realizing the power supply to the battery management system, ensuring that the activation signal is output to the battery management system only when the time when the button is pressed is within the preset time range.

[0083] In an exemplary embodiment, as shown in Fig. 7, the switch unit 46 includes a voltage stabilizing diode ZD1, a resistor R5, and a capacitor C3. The cathode of the voltage stabilizing diode ZD1 is connected to the output end of the time window unit 42, the anode of the voltage stabilizing diode ZD1 is connected to the first end of the resistor R5, the second end of the resistor R5 is respectively connected to the first end of the capacitor C3 and the input end of the signal output unit 44, and the second end of the capacitor C3 is grounded.

[0084] Exemplarily, when the time window unit 42 outputs the second electrical signal, and the voltage value of the second electrical signal is greater than the reverse breakdown voltage value of the Zener diode ZD1, the Zener diode ZD1 is turned on, and the current passes through the resistor R5 to charge the capacitor C3. When the capacitor C3 is charged for a certain period of time, the third electrical signal is output to the signal output unit 44, so that the signal output unit 44 outputs an activation signal to the battery management system 500. When the time window unit 42 stops outputting the second electrical signal, or the voltage value of the output second electrical signal is less than the reverse breakdown voltage value of the Zener diode ZD1, the Zener diode ZD1 is turned off and stops outputting the third electrical signal, so that the signal output unit 44 stops outputting the battery management system 500.

[0085] In this embodiment, by introducing a switch unit including a Zener diode ZD1, a resistor R5 and a capacitor C3, it is ensured that the third electrical signal is output to the signal output unit only when the voltage value of the second electrical signal is greater than the reverse breakdown voltage of the Zener diode, thereby further enhancing the stability and anti-interference ability of the system, not only avoiding unexpected activation due to signal fluctuations or noise, but also ensuring that even when the button is continuously pressed, the system only performs one effective activation operation, effectively reducing unnecessary power consumption and improving the overall performance and energy efficiency of the energy storage device.

[0086] In an exemplary embodiment, as shown in FIG8 , the key switch module 2 includes a resistor R1 and a key switch SW1 . The first end of the resistor R1 is used to connect to the power supply 300 , the second end of the resistor R1 is connected to the first end of the key switch SW1 , and the second end of the key switch SW1 is connected to the activation module 4 .

[0087] Exemplarily, when the key switch SW1 of the key switch module 2 is in a pressed state, the circuit between the power supply 300 and the activation module 4 is turned on, that is, a first electrical signal is output to the activation module 4 based on the power supply voltage of the power supply 300, so that when the signal at the output end of the key switch module 2 jumps to the first electrical signal, the activation module 4 outputs an activation signal to the battery management system 500 based on the power supply voltage of the power supply 300. When the key switch SW1 of the key switch module 2 is in a reset state, the circuit between the power supply 300 and the activation module 4 is turned off, and the output of the first electrical signal to the activation module 4 is stopped, so that the battery management system 500 is powered off and shut down.

[0088] In this embodiment, by designing a key switch module including a resistor R1 and a key switch SW1, it is ensured that only when the key is pressed will the first electrical signal be output to the activation module based on the power supply voltage of the power supply, thereby triggering the subsequent activation process and simplifying the circuit structure.

[0089] In order to describe the technical solution of the present application in more detail, it is described below in conjunction with Figure 9. The activation circuit of the energy storage device includes a key switch module 2 and an activation module 4. The activation module 4 also includes a time window unit 42, a switch unit 46 and a signal output unit 44, wherein the time window unit 42 also includes a switch circuit 422, a first charge and discharge circuit 424 and a second charge and discharge circuit 426. Please refer to Figure 9 for the specific circuit structure.

[0090] The key switch module 2 is composed of a resistor R1 and a key switch SW1, wherein the resistor R1 is a current limiting resistor and the SW1 is a key touch switch. When the key switch SW1 is pressed, the power supply voltage BAT+ of the power supply 300 supplies power to the time window unit 42 through the resistor R1 and the key switch SW1.

[0091] The time window unit 42 is composed of a switch circuit 422 (composed of a PNP transistor Q1), a first charge and discharge circuit 424 (composed of a resistor R3, a capacitor C1, a diode D1 and a resistor R1 with a set time constant), and a second charge and discharge circuit 426 (composed of an energy storage capacitor C2 and a discharge resistor R4). When the key switch SW1 is pressed, the first charge and discharge circuit 424 is energized, and the power supply voltage BAT+ of the power supply 300 is charged to the capacitor C1 through the resistor R1, the key switch SW1, the emitter and base of the PNP transistor Q1, and the resistor R3. By setting the charging time constant of the resistor R3 and the capacitor C1, the conduction time of the PNP transistor Q1 is set. When the PNP transistor Q1 is turned on, the power supply voltage BAT+ of the power supply 300 is charged to the capacitor C2 through the resistor R1, the key switch SW1, the emitter and collector of the PNP transistor Q1, and the voltage value across the capacitor C2 reaches the working voltage threshold set by the switch unit 46, and the switch unit 46 starts to work. When the capacitor C1 is fully charged, the PNP transistor Q1 is turned off, and the resistor R4 starts to discharge the charge on the energy storage capacitor C2. After the voltage of the energy storage capacitor C2 is discharged to a voltage lower than the working threshold voltage set by the switch unit 46, the switch unit 46 stops working.

[0092] The switch unit 46 is composed of a voltage stabilizing diode ZD1, a current limiting resistor R5 and a filter capacitor C3, wherein the operating voltage threshold of the switch unit 46 can be set by the voltage stabilizing diode ZD1 and the current limiting resistor R5. When the second charge and discharge circuit 426 is powered, the voltage value across the energy storage capacitor C2 reaches the reverse breakdown voltage value of the voltage stabilizing diode ZD1, and the current of the capacitor C2 charges the filter capacitor C3 through the current limiting resistor R5. When the voltage across the capacitor C3 is greater than the conduction voltage of the NPN transistor Q3, the NPN transistor Q3 is turned on, and the signal output unit 44 starts working and outputs an activation signal to the battery management system 500.

[0093] The signal output unit 44 is composed of a PNP transistor Q2, an NPN transistor Q3, a current limiting resistor R6 and a resistor R7. When the voltage stabilizing diode ZD1 of the switch unit 46 is broken down, the NPN transistor Q3 is turned on, and under the action of the power supply voltage BAT+ of the power supply 300, the current flows to the ground terminal through the current limiting resistor R6, the emitter and base of the PNP transistor Q2, the current limiting resistor R7, and the collector and emitter of the NPN transistor Q3, forming a conduction loop. At this time, the PNP transistor Q2 is turned on and outputs a valid activation signal SW_WAKE to the battery management system 500 to activate the battery management system 500.

[0094] The second charge-discharge circuit 426 is composed of a resistor R3, a capacitor C1, a diode D1 and a resistor R2. When the key switch SW1 is released, the voltage of the capacitor C1 is discharged through the diode D1 and the resistor R1, so that the voltage of the capacitor C1 is discharged when the key switch SW1 is released, so that when the key switch SW1 is pressed next time, the switch circuit 422 can be turned on again, and the second charge-discharge circuit 426 can be charged again. That is, by resetting and discharging, it is ensured that each time the key switch SW1 is pressed, the power supply voltage BAT+ of the power supply 300 can charge the capacitor C2 through the resistor R1, the key switch SW1 and the PNP transistor Q1.

[0095] It should be noted here that, in the case where the key switch SW1 is continuously pressed, in this case, the power supply voltage BAT+ of the power supply 300 is charged to the capacitor C1 through the resistor R1, the key switch SW1, the emitter and base of the PNP transistor Q1, and the resistor R3. When the voltage of the capacitor C1 is charged to the voltage of the capacitor C1 plus the PN junction voltage drop of the PNP transistor Q1 equals the power supply voltage BAT+ of the power supply 300 generated at both ends of the resistor R2, the PNP transistor Q1 is turned off. After the voltage of the energy storage capacitor C2 is discharged to a level lower than the operating voltage threshold of the switch unit 46, the subsequent switch unit 46 and the signal output unit 44 stop working. Even if the key switch SW1 is continuously pressed, the energy storage device can be freely turned on or off according to its own power supply status. When the key switch SW1 is pressed briefly, the energy storage capacitor C2 has a short charging time and the voltage across it does not reach the operating voltage threshold of the switch unit 46. At this time, it is determined that the key switch SW1 is touched invalidly, and the signal output unit 44 does not work and no activation signal is output.

[0096] In this embodiment, based on the design of the hardware circuit, it is ensured that even if the button is continuously pressed, the battery management system is only activated once, effectively avoiding the problem that the battery management system cannot be shut down normally or is frequently started and stopped due to continuous pressing of the button in scenes prone to accidental touches such as transportation. At the same time, it can avoid unexpected activation caused by short-term accidental touches, thereby significantly reducing unnecessary energy consumption and improving the energy efficiency and stability of energy storage equipment.

[0097] In an exemplary embodiment, the present application further provides an energy storage device, which includes: a power supply, a battery management system, and a key activation circuit as in the above embodiment.

[0098] In the present embodiment, an energy storage device is provided. By introducing the above-mentioned button activation circuit, it is ensured that even when the button of the energy storage device is continuously pressed, the battery management system is only activated once, thereby effectively avoiding the problem that the battery management system cannot be shut down normally or is frequently started and stopped due to continuous pressing of the button in scenarios prone to accidental touches such as transportation, thereby significantly reducing unnecessary energy consumption and improving the energy efficiency and stability of the energy storage device.

[0099] In the description of this specification, the description with reference to the terms "some embodiments", "other embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic description of the above terms does not necessarily refer to the same embodiment or example.

[0100] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0101] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the present application. It should be noted that, for a person of ordinary skill in the art, several modifications and improvements may be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A key activation circuit, characterized in that: include: A key switch module and an activation module; the key switch module and the activation module are connected in series between the power supply and the battery management system in sequence, and the activation module is also used to connect to the power supply; The key switch module outputs a first electrical signal when being pressed; The activation module is used to output an activation signal to the battery management system based on the power supply voltage of the power supply when the signal at the output end of the key switch module jumps to the first electrical signal.

2. The key activation circuit according to claim 1, characterized in that: The activation module is used to output the activation signal when the signal input from the key switch module jumps to the first electrical signal and the duration of the first electrical signal is within a preset time range.

3. The key activation circuit according to claim 2, characterized in that: The activation module comprises a time window unit and a signal output unit which are sequentially connected in series between the key switch module and the battery management system, and the power supply end of the signal output unit is used to connect to the power supply; The time window unit is used to receive the first electrical signal and output a second electrical signal when the duration of the first electrical signal is within the preset time range, so that the signal output unit outputs the activation signal based on the power supply voltage of the power supply.

4. The key activation circuit according to claim 3, characterized in that: The activation module further comprises a switch unit connected in series between the time window unit and the signal output unit; The switch unit is used for outputting a third electrical signal to the signal output unit when the voltage value of the second electrical signal is greater than a preset conduction voltage threshold, so that the signal output unit outputs the activation signal.

5. The key activation circuit according to claim 3, characterized in that: The time window unit includes: a switch circuit, a first charge and discharge circuit, and a second charge and discharge circuit; The input end of the switch circuit is connected to the output end of the key switch module, the first output end of the switch circuit is connected to the input end of the first charge and discharge circuit, the second output end of the switch circuit is connected to the input end of the second charge and discharge circuit, the discharge controlled end of the first charge and discharge circuit is connected to the output end of the key switch module, and the output end of the second charge and discharge circuit is connected to the input end of the signal output unit; The switch circuit is turned on when the voltage difference between the input terminal and the first output terminal of the switch circuit meets the conduction condition, and charges the first charge-discharge circuit and the second charge-discharge circuit, so that the second charge-discharge circuit outputs the second electrical signal; The switch circuit is turned off when the voltage difference does not satisfy the conduction condition, so that the first charge and discharge circuit and the second charge and discharge circuit are discharged.

6. The key activation circuit according to claim 5, characterized in that: The switch circuit includes: a switch tube Q1; the emitter of the switch tube Q1 is connected to the output end of the key switch module, the base of the switch tube Q1 is connected to the input end of the first charge and discharge circuit, and the collector of the switch tube Q1 is connected to the input end of the second charge and discharge circuit; and / or, The first charge and discharge circuit comprises: a resistor R3, a capacitor C1, a diode D1 and a resistor R2; the resistor R3, the anode of the diode D1, the cathode of the diode D1 and the resistor R2 are sequentially connected in series between the first output end and the ground end of the switch circuit, the cathode of the diode D1 is also connected to the output end of the key switch module, and the capacitor C1 is connected in parallel with the resistor R2; and / or, The second charge and discharge circuit includes: a capacitor C2 and a resistor R3; a first end of the capacitor C2 is connected to the second output end of the switch circuit, a second end of the capacitor C2 is grounded, and the resistor R3 is connected in parallel with the capacitor C2.

7. The key activation circuit according to claim 3, characterized in that: The signal output unit includes: a switch tube Q2 and a switch tube Q3; The emitter of the switch tube Q2 is used to connect to the power supply, the collector of the switch tube Q2 is used to connect to the battery management system, and the base of the switch tube Q2 is connected to the collector of the switch tube Q3; The base of the switch tube Q3 is connected to the output end of the time window unit, and the emitter of the switch tube Q3 is grounded.

8. The key activation circuit according to claim 4, characterized in that: The switch unit includes: a voltage stabilizing diode ZD1, a resistor R5 and a capacitor C3; The cathode of the voltage zener diode ZD1 is connected to the output end of the time window unit, the anode of the voltage zener diode ZD1 is connected to the first end of the resistor R5, the second end of the resistor R5 is respectively connected to the first end of the capacitor C3 and the input end of the signal output unit, and the second end of the capacitor C3 is grounded.

9. The key activation circuit according to claim 1, characterized in that: The key switch module includes: a resistor R1 and a key switch SW1; The first end of the resistor R1 is used to connect to the power supply, the second end of the resistor R1 is connected to the first end of the key switch SW1, and the second end of the key switch SW1 is connected to the activation module.

10. An energy storage device, characterized in that: The energy storage device comprises: Power supply; Battery management system; and, A key activation circuit as claimed in any one of claims 1 to 9.

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