False touch prevention switch circuit of energy storage device
By introducing touch buttons and logic control circuits into the energy storage device, combined with battery management chips and time delay relays, the problem of accidental touches by mechanical buttons was solved, and the stable operation of the energy storage device was achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-14
- Publication Date
- 2026-03-27
AI Technical Summary
The mechanical buttons on existing energy storage devices lack anti-accidental touch functionality, which may lead to users accidentally operating the battery control system and affecting the normal operation of the energy storage device.
An anti-accidental touch switch circuit was designed, which includes a touch button, a battery management chip, a logic control circuit, and a DC-DC step-down unit. By using the logic control of transistors and NMOS tubes, combined with a time-delay relay and a light-emitting diode, it automatically judges and skips the erroneous shutdown command to ensure the normal operation of the system.
This effectively avoids the adverse effects of misoperation, ensures the normal operation of the energy storage device, and improves the stability and reliability of the system.
Smart Images
Figure CN224053916U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of power electronics, specifically relates to a kind of energy storage device anti-misoperation switch circuit. BACKGROUND
[0002] In the energy storage field, for example, user energy storage, commercial energy storage or large industrial energy storage system, battery control system is indispensable.Because any form of energy storage system, battery's temporary storage, buffering capacity is indispensable, so the stability of battery control system has very important influence on the normal continuous operation of entire energy storage system.
[0003] The battery control system applied on energy storage device is equipped with manual switch control device, for example, mechanical press switch, when user makes press operation, switch action is triggered.The activation operation is executed when the switch is triggered when battery control system is not activated;When battery control system is activated, the closing operation is executed when the switch is triggered, that is, system will immediately enter hibernation or closed state, if battery control system is in linkage state with other systems or modules at this time, it will have adverse effect on other systems.
[0004] Because user is not always able to judge whether the closing time of battery control system is correct, so misoperation may occur, that is, in the process of battery charging and discharging, mechanical button is mispressed, system is mis-closed, and then the overall working state of energy storage device is affected.Mechanical button in prior art generally does not have anti-misoperation function, only manual foolproof management is carried out by user, so potential hidden danger caused by misoperation cannot be excluded. UTILITY MODEL CONTENT
[0005] The utility model aims at providing a kind of energy storage device anti-misoperation switch circuit, the anti-misoperation switch circuit can exclude the adverse circuit influence caused by user misoperation, ensure the normal work of energy storage device.
[0006] To achieve the above-mentioned purpose, the specific technical solutions adopted by the utility model are as follows:
[0007] A kind of energy storage device anti-misoperation switch circuit, containing touch button;It also contains battery management chip for judging battery operating state, battery stack for power supply, logic control circuit connected with the touch button and DCDC step-down unit connected with the battery stack;The DCDC step-down unit is also connected with the battery management chip.
[0008] As the preferred of the utility model, the logic control circuit contains first transistor T1, second transistor T2, third transistor T3 and NMOS tube, the base of first transistor T1 and third transistor T3 is connected with the touch button, the emitter of first transistor T1 is connected with the base of second transistor T2, the emitter of second transistor T2 is connected with the gate G of NMOS tube, the drain D of NMOS tube is connected with relay coil group in series, and is connected to the battery management chip, the emitter of third transistor T3 is connected with the battery management chip.
[0009] As the preferred of the utility model, the gate G and source S of NMOS tube are connected with energy storage capacitor C in parallel, one end of energy storage capacitor C is connected with the emitter of second transistor T2, and the other end is connected with ground terminal.
[0010] As the preferred of the utility model, the relay coil group contains delay relay coil KT and electromagnetic relay coil KM1, delay relay coil KT controls delay normally open switch KT', and electromagnetic relay coil KM1 controls normally open switch KM1'.
[0011] As the preferred of the utility model, the DCDC voltage reducing unit contains first power transmission end P1 and second power transmission end P2, the first power transmission end P1 is connected with the power supply positive pin of battery management chip, and the second power transmission end P2 is connected with normally open switch KM1'.
[0012] As the preferred of the utility model, the anti-misoperation switch circuit further contains light emitting diode for visual reminding, one end of light emitting diode is connected with the output pin of battery management chip, and the other end is connected with ground terminal.
[0013] As the preferred of the utility model, the drain D of NMOS tube and the second power transmission end P2 of DCDC voltage reducing unit are further provided with current-limiting resistor R.
[0014] As the preferred of the utility model, the first transistor T1, second transistor T2 and third transistor T3 are all NPN type transistors.
[0015] In conclusion, the utility model has the following beneficial effects:
[0016] Through the joint logic control of the four controllable switching elements of the first transistor T1, the second transistor T2, the third transistor T3 and the NMOS tube in the logic control circuit, the cooperation of the wake-up judgment function of the battery management chip, and the delay selection of the delay always-on switch KT' and the always-on switch KM1', the system can automatically judge and skip the shutdown operation in the case of misoperation of the touch button, thereby excluding the adverse circuit influence caused by the misoperation of the user, and ensuring the normal work of the energy storage device. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 The circuit diagram of the anti-misoperation switch circuit of the energy storage device. DETAILED DESCRIPTION
[0018] The technical solutions of the embodiments of the present application will be explained and described below in combination with the drawings of the embodiments of the present application. However, the following embodiments are only preferred embodiments of the present application, and are not all. Based on the embodiments in the embodiments, other embodiments obtained by those skilled in the art without creative labor are all within the protection scope of the present application.
[0019] The terms "first", "second", and the like in the specification and claims and the above drawings are used to distinguish different objects, and are not used to describe a specific order. In addition, the term "comprising" and any variation thereof is intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units not listed, or optionally also includes other steps or units inherent to the process, method, product or device.
[0020] The anti-misoperation switch circuit of the energy storage device comprises a touch button, further comprises a battery management chip for judging the running state of the battery, a battery stack for power supply, a logic control circuit connected with the touch button, and a DCDC step-down unit connected with the battery stack; the DCDC step-down unit is further connected with the battery management chip.
[0021] The logic control circuit comprises a first transistor T1, a second transistor T2, a third transistor T3 and an NMOS tube; the touch button is connected with the base of the first transistor T1 and the third transistor T3, the emitter of the first transistor T1 is connected with the base of the second transistor T2; the emitter of the second transistor T2 is connected with the gate G of the NMOS tube; the drain D of the NMOS tube is connected with the relay coil group in series, and is connected with the battery management chip; the emitter of the third transistor T3 is connected with the battery management chip. The gate G and the source S of the NMOS tube are connected with an energy storage capacitor C in parallel; one end of the energy storage capacitor C is connected with the emitter of the second transistor T2, and the other end is connected with the ground end. The relay coil group comprises a time delay relay coil KT and an electromagnetic relay coil KM1; the time delay relay coil KT controls a time delay normally open switch KT', and the electromagnetic relay coil KM1 controls a normally open switch KM1'. The DCDC voltage reduction unit comprises a first power transmission end P1 and a second power transmission end P2; the first power transmission end P1 is connected with the power supply positive pin of the battery management chip, and the second power transmission end P2 is connected with the normally open switch KM1'. The anti-misoperation switch circuit further comprises a light emitting diode for visual prompting, one end of the light emitting diode is connected with the output pin of the battery management chip, and the other end is connected with the ground end. The drain D of the NMOS tube and the second power transmission end P2 of the DCDC voltage reduction unit are further provided with a current limiting resistor R.
[0022] In the embodiment, as shown in the figure, Figure 1 Firstly, the power supply system is provided with high voltage input by the battery stack, and the battery stack can be provided with a power supply battery group by the energy storage device itself, and then does not need to be powered by an external power supply, but the required power supply voltage of the device is low, and therefore a DCDC voltage reduction unit is arranged in connection with the battery stack. The DCDC voltage reduction unit comprises a first power transmission end P1 and a second power transmission end P2, wherein the first power transmission end P1 is connected with the No. 1 power supply positive pin of the battery management chip, directly and continuously supplies power to the battery management chip, and guarantees the normal work of the battery management system BMS, and the No. 2 power supply negative pin of the battery management chip is grounded.
[0023] The No. 3 pin of the battery management chip is a wake-up pin, which is connected with the second power supply end P2 of the DCDC voltage reduction unit, but a normally open switch KM1' is arranged between the two, when the normally open switch KM1' is not closed, the No. 3 pin of the battery management chip continuously receives a low level, when the normally open switch KM1' is closed, the second power supply end P2 is connected with the No. 3 pin of the battery management chip, which is a high level. The No. 4 pin of the battery management chip is a power-off signal input pin, when the No. 4 pin triggers a high level signal, the battery management chip will judge whether it needs to be powered off and hibernate according to the specific battery system operation. The No. 5 pin of the battery management chip is an output pin, when the battery management system works, the No. 5 pin will continuously output a high level. Since the No. 5 pin is connected with a light-emitting diode for visual prompting, when the battery management system works, the light-emitting diode is powered and continuously emits light to remind the staff that the system is running.
[0024] In the embodiment, when the No. 1 and No. 2 pins of the battery management chip are normally powered, the BMS is woken up to work when the No. 3 pin is a high level signal; if the No. 4 pin is a high level signal at this time, the BMS will make the next judgment according to the battery system operation, if there is no charging and discharging at this time, it can be powered off and hibernated; if the battery system is charging and discharging at this time, it will not react and continue to work normally.
[0025] In the embodiment, the first transistor T1, the second transistor T2 and the third transistor T3 are all NPN type transistors, which are turned on when the emitter is forward biased and the collector is reverse biased.
[0026] The specific logic control circuit control mode is that when the finger presses the touch button, the first transistor T1 will be forward biased at the emitter, at this time the first transistor T1 is turned on; the second transistor T2 is forward biased at the emitter, at this time the second transistor T2 is turned on; after the current is amplified through the two transistors, the energy storage capacitor C can be quickly charged, the capacitor C is quickly filled, and the NMOS tube is turned on. Specifically, when the Vg of the NMOS tube is greater than Vs, the tube body is turned on, the electromagnetic relay coil KM1 is turned on and powered, the delay relay coil KT is turned on and powered, the normally open switch KM1' is closed, the No. 3 pin of the battery management chip is a high level, the BMS is woken up to work, and the light-emitting diode is powered and emits light; at this time the delay normally open switch KT' is not closed, and the third transistor T3 is still in the off state.
[0027] When the finger leaves the touch button, the first transistor T1 is turned off, therefore, the second transistor T2 is turned off, since the energy storage capacitor C stores energy, the NMOS tube still satisfies Vg>Vs, the tube body is still turned on, the electromagnetic relay coil KM1 is turned on, the delay relay coil KT is turned on, the BMS still works, the light-emitting diode is powered and emits light, and the delay normally open switch KT' is closed.
[0028] If the finger presses the touch button again at this time, the third transistor T3 is forward biased, and the delay always-on switch KT' is closed due to the closing of the always-on switch KM1', so the third transistor T3 is turned on, and the No. 4 pin of the battery management chip is high. At this time, the BMS makes the next judgment according to the running condition of the battery system. If there is no charging and discharging at this time, the power can be turned off and the light-emitting diode stops emitting light. If the battery system is charging and discharging at this time, no reaction is made, and the light-emitting diode continues to emit light.
[0029] The above description is merely a preferred embodiment of the present disclosure and a description of the principles of the technology used. Those skilled in the art should understand that the scope of protection involved in the present disclosure is not limited to the technical solutions formed by the specific combinations of the above technical features, and should also cover other technical solutions formed by any combination of the above technical features or equivalent features without departing from the disclosed concept. For example, the above features can be replaced with similar features disclosed in the present disclosure (but not limited to) with similar functions to form technical solutions.
[0030] In addition, although some specific implementation details are included in the above discussion, these should not be interpreted as limiting the scope of the present disclosure. Some features described in the context of separate embodiments can also be implemented in combination in a single embodiment. Conversely, various features described in the context of a single embodiment can also be implemented separately or in any suitable sub-combination in multiple embodiments.
Claims
1. An energy storage device anti-mis-touch switch circuit, comprising a touch button, characterized in that, The anti-misoperation switch circuit further comprises a battery management chip for judging the running state of the battery, a battery stack for power supply, a logic control circuit connected with the touch button, and a DCDC voltage reduction unit connected with the battery stack; the DCDC voltage reduction unit is further connected with the battery management chip.
2. The false touch prevention switch circuit for an energy storage device according to claim 1, wherein The logic control circuit comprises a first transistor T1, a second transistor T2, a third transistor T3, and an NMOS transistor; the touch button is connected with the base of the first transistor T1 and the third transistor T3, the emitter of the first transistor T1 is connected with the base of the second transistor T2; the emitter of the second transistor T2 is connected with the gate G of the NMOS transistor; the drain D of the NMOS transistor is connected in series with a relay coil group and connected with the battery management chip; the emitter of the third transistor T3 is connected with the battery management chip.
3. The false touch prevention switch circuit for an energy storage device according to claim 2, wherein The gate G and the source S of the NMOS transistor are connected in parallel with an energy storage capacitor C; one end of the energy storage capacitor C is connected with the emitter of the second transistor T2, and the other end is connected with a ground terminal.
4. The false touch prevention switch circuit for an energy storage device according to claim 3, wherein The relay coil group comprises a time-delay relay coil KT and an electromagnetic relay coil KM1; the time-delay relay coil KT controls a time-delay normally open switch KT', and the electromagnetic relay coil KM1 controls a normally open switch KM1'.
5. The false touch prevention switch circuit for an energy storage device according to claim 4, wherein The DCDC voltage reduction unit comprises a first power supply terminal P1 and a second power supply terminal P2; the first power supply terminal P1 is connected with the power supply positive pin of the battery management chip, and the second power supply terminal P2 is connected with the normally open switch KM1'.
6. The false touch prevention switch circuit of an energy storage device according to claim 5, wherein, The anti-misoperation switch circuit further comprises a light-emitting diode for visual prompting; one end of the light-emitting diode is connected with the output pin of the battery management chip, and the other end is connected with a ground terminal.
7. The false touch prevention switch circuit of energy storage device according to claim 2, wherein, A current-limiting resistor R is further arranged between the drain D of the NMOS transistor and the second power supply terminal P2 of the DCDC voltage reduction unit.
8. The false touch prevention switch circuit of energy storage device according to claim 2, wherein, The first transistor T1, the second transistor T2, and the third transistor T3 are all NPN type transistors.