Self-destroying circuit and electronic device

Abstract

The application discloses a self-destruction circuit and electronic equipment, wherein the self-destruction circuit comprises a self-destruction power supply unit, a concurrent self-destruction energy storage unit, a self-destruction switch control unit and a self-destruction trigger unit; the self-destruction power supply unit can provide self-destruction power for the concurrent self-destruction energy storage unit; the self-destruction trigger unit can output a self-destruction control signal after receiving a trigger signal; the self-destruction switch control unit can control the conduction of a path between the concurrent self-destruction energy storage unit and each storage unit under the control of the self-destruction control signal, output a self-destruction voltage to each storage unit, and make each storage unit damaged after receiving the self-destruction voltage. Since the concurrent self-destruction energy storage unit in the application can simultaneously provide self-destruction voltage for each storage unit, the self-destruction speed can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic circuit, in particular to a self-destruction circuit and electronic equipment. BACKGROUND

[0002] With the development of information technology, more and more data in electronic equipment needs to be stored and recorded, and in most cases, multiple storage units are needed to realize a large-capacity storage system. With the development of semiconductor technology, NAND FALSH MEMORY has gradually become the main choice of storage unit.

[0003] In some cases with high data security requirements, the data stored in the storage unit needs to be protected from being leaked, and in some cases, the electronic equipment needs to self-destruct the storage unit. In the related art, when multiple storage units are self-destructed, the self-destruction time is long. SUMMARY

[0004] The present application provides a self-destruction circuit and electronic equipment to solve the problem of long self-destruction time when self-destructing the storage unit in the prior art.

[0005] In a first aspect, the present application provides a self-destruction circuit, comprising: a self-destruction power supply unit, a concurrent self-destruction energy storage unit, a self-destruction switch control unit and a self-destruction trigger unit, wherein:

[0006] The self-destruction power supply unit is configured to provide self-destruction power for the concurrent self-destruction energy storage unit, so that the concurrent self-destruction energy storage unit stores self-destruction power for damaging the storage unit.

[0007] The self-destruction trigger unit is configured to output a self-destruction control signal after receiving a trigger signal.

[0008] The concurrent self-destruction control unit is configured to control the conduction of the path between the concurrent self-destruction energy storage unit and each storage unit under the control of the self-destruction control signal, so as to output the self-destruction voltage for damaging the storage unit from the concurrent self-destruction energy storage unit to each storage unit.

[0009] In a possible implementation, the circuit further comprises a self-destruction control unit, wherein:

[0010] The self-destruction control unit is configured to send a start detection signal to the concurrent self-destruction energy storage unit to obtain self-destruction electric energy stored in the concurrent self-destruction energy storage unit, send a stop detection signal to the concurrent self-destruction energy storage unit to stop obtaining the self-destruction electric energy stored in the concurrent self-destruction energy storage unit, output a charging control signal to the concurrent self-destruction energy storage unit to enable the self-destruction power supply unit to provide self-destruction electric energy for the concurrent self-destruction energy storage unit when the self-destruction electric energy stored in the self-destruction control unit is less than target electric energy, and output a stop charging signal to the concurrent self-destruction energy storage unit to enable the self-destruction power supply unit to stop providing self-destruction electric energy for the concurrent self-destruction energy storage unit when the self-destruction electric energy stored in the concurrent self-destruction energy storage unit is greater than or equal to the target electric energy.

[0011] In a possible implementation, the self-destruction control unit is further configured to output the trigger signal when it is determined that the self-destruction control unit is abnormal.

[0012] In a possible implementation, the self-destruction control unit further comprises a tamper detection unit.

[0013] The tamper detection unit is configured to output the trigger signal after detecting a tamper signal.

[0014] In a possible implementation, the concurrent self-destruction energy storage unit comprises self-destruction energy storage sub-units corresponding to energy storage units, and the self-destruction energy storage sub-units are connected in parallel, and for each self-destruction energy storage sub-unit, the self-destruction energy storage sub-unit comprises an energy storage switch, a detection switch, and an energy storage capacitor.

[0015] A first end of the energy storage switch is electrically connected to the self-destruction power supply unit, a second end of the energy storage switch is electrically connected to a first end of the energy storage capacitor, a first end of the detection switch, and the self-destruction switch control unit, and a control end of the energy storage switch is configured to receive a first switch control signal output by the self-destruction control unit to control the energy storage switch to close and a second switch control signal output by the self-destruction control unit to control the energy storage switch to open.

[0016] A second end of the energy storage capacitor is grounded.

[0017] A second end of the detection switch is electrically connected to an input end of the self-destruction control unit, and a control end of the detection switch is configured to receive a third switch control signal output by the self-destruction control unit to control the detection switch to close and a fourth switch control signal output by the self-destruction control unit to control the detection switch to open.

[0018] The energy storage switch is configured to, after being closed, conduct a path between the self-destruction power supply unit and the energy storage capacitor, and, after being opened, disconnect the path between the self-destruction power supply unit and the energy storage capacitor.

[0019] The detection switch is configured to, after being closed, turn on a path between the energy storage capacitor and the self-destruction control unit, and after being opened, turn off the path between the energy storage capacitor and the self-destruction control unit.

[0020] In a possible implementation, the self-destruction switch control unit comprises a self-destruction switch corresponding to the self-destruction energy storage subunit, and the self-destruction switch control unit is configured to:

[0021] For each self-destruction switch, a first end of the self-destruction switch is electrically connected to the self-destruction energy storage subunit corresponding to the self-destruction switch, a second end of the self-destruction switch is electrically connected to the storage unit corresponding to the self-destruction switch, and a control end of the self-destruction switch is configured to receive the self-destruction control signal.

[0022] The self-destruction switch is configured to, after receiving the self-destruction control signal, turn on a path between the self-destruction energy storage subunit and the energy storage unit, so as to output the self-destruction voltage to the energy storage unit.

[0023] In a possible implementation, a third end of the self-destruction switch is configured to receive a supply voltage of the energy storage unit corresponding to the self-destruction switch.

[0024] The self-destruction switch is further configured to, after receiving the self-destruction control signal, turn off a path between the third end of the self-destruction switch and the second end of the self-destruction switch.

[0025] In a possible implementation, the concurrent self-destruction energy storage unit further comprises a buffer circuit.

[0026] A positive input end of the buffer circuit is electrically connected to the second end of each detection switch, and a negative input end of the buffer circuit is electrically connected to an output end of the buffer circuit and the self-destruction control unit.

[0027] The buffer circuit is configured to input an energy storage signal and output a to-be-detected signal to the self-destruction control unit.

[0028] In a possible implementation, the self-destruction power supply unit comprises a main system power supply module, a self-destruction system power supply module, a power management module, and a boost module, and the self-destruction power supply unit is configured to:

[0029] An output end of the main system power supply module is electrically connected to a first input end of the battery management module, an output end of the self-destruction system power supply module is electrically connected to a second input end of the battery management module, an output end of the power management module is electrically connected to an input end of the boost module, a control end of the power management module is signal-connected to the self-destruction control unit, and an output end of the boost module is electrically connected to the concurrent self-destruction energy storage unit.

[0030] The self-destruction control unit is further configured to output a voltage control signal of a power management module according to a first voltage output by the main system power supply module and a second voltage output by the self-destruction system power supply module.

[0031] The power management unit is configured to select one of the first voltage and the second voltage to output under control of the voltage control signal.

[0032] The voltage boosting module is configured to boost the voltage output by the power management module.

[0033] In a second aspect, the present application provides an electronic device comprising a plurality of energy storage units and the self-destruction circuit according to any one of the first aspect.

[0034] The present application has the following advantages:

[0035] The self-destruction circuit and the electronic device provided by the present application can provide self-destruction power to the concurrent self-destruction energy storage unit by the self-destruction power supply unit, and output a self-destruction control signal after receiving a trigger signal by the self-destruction trigger unit, and turn on the path between the concurrent self-destruction energy storage unit and each storage unit under control of the self-destruction control signal by the self-destruction switch control unit, and output a self-destruction voltage to each storage unit, so that each storage unit is damaged after receiving the self-destruction voltage. Since the concurrent self-destruction energy storage unit in the present application can provide a self-destruction voltage to each storage unit at the same time, the self-destruction speed can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0037] Figure 1 A structure diagram of a self-destruction circuit provided by an embodiment of the present application;

[0038] Figure 2 A structure diagram of another self-destruction circuit provided by an embodiment of the present application;

[0039] Figure 3 A structure diagram of another self-destruction circuit provided by an embodiment of the present application;

[0040] Figure 4 A structure diagram of another self-destruction circuit provided by an embodiment of the present application;

[0041] Figure 5 A structure diagram of another self-destruction circuit provided by an embodiment of the present application;

[0042] Figure 6 Another structure schematic view of the self-destruction circuit provided by the embodiment of the present application is provided.

[0043] Figure 7 Another structure schematic view of the self-destruction circuit provided by the embodiment of the present application is provided.

[0044] Figure 8 Another structure schematic view of the self-destruction circuit provided by the embodiment of the present application is provided.

[0045] Figure 9 Another structure schematic view of the self-destruction circuit provided by the embodiment of the present application is provided.

[0046] Figure 10 Another structure schematic view of the self-destruction circuit provided by the embodiment of the present application is provided.

[0047] Figure 11 Another structure schematic view of the self-destruction circuit provided by the embodiment of the present application is provided.

[0048] Figure 12 Another structure schematic view of the self-destruction circuit provided by the embodiment of the present application is provided.

[0049] Figure 13 Another structure schematic view of the self-destruction circuit provided by the embodiment of the present application is provided.

[0050] Figure 14 Another structure schematic view of the self-destruction circuit provided by the embodiment of the present application is provided.

[0051] Figure 15 Another structure schematic view of the self-destruction circuit provided by the embodiment of the present application is provided.

[0052] Figure 16 Another structure schematic view of the self-destruction circuit provided by the embodiment of the present application is provided.

[0053] Figure 17 Another structure schematic view of the self-destruction circuit provided by the embodiment of the present application is provided. DETAILED DESCRIPTION

[0054] In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall into the protection scope of the present application.

[0055] Currently, the main ways to achieve self-destruction of stored data are soft and hard ways. Soft self-destruction erases key information in the storage unit through program instructions. Since the erasing time of the storage unit needs a certain length of time and will increase as the capacity increases, and as multiple storage units are used, the time will be too long to cause the risk of power-off leakage, and the erased data may still be restored, therefore, in the related technology, the storage unit can be destroyed by hard self-destruction. Hard self-destruction can directly access the storage unit through a high-voltage self-destruction power supply controlled by a circuit, directly damage the physical structure inside the storage, and achieve the purpose of destroying data. In a system including multiple storage units, currently, a self-destruction power supply is usually used to sequentially self-destruct each storage unit by independent time-sharing, but as the number of storage units increases, the number of steps of time-sharing execution also increases, and the time to complete self-destruction also increases.

[0056] Based on the above problems, an embodiment of the present application provides a self-destruction circuit, as shown in the figure, which comprises a self-destruction power supply unit 101, a concurrent self-destruction energy storage unit 102, a self-destruction switch control unit 103, and a self-destruction trigger unit 104, wherein: Figure 1

[0057] The self-destruction power supply unit 101 is used to provide self-destruction power for the concurrent self-destruction energy storage unit 102, so that the concurrent self-destruction energy storage unit stores self-destruction power for damaging the storage unit;

[0058] The self-destruction trigger unit 104 is used to output a self-destruction control signal after receiving a trigger signal;

[0059] The self-destruction switch control unit 103 is used to turn on the path between the concurrent self-destruction energy storage unit 102 and each storage unit under the control of the self-destruction control signal, so that the concurrent self-destruction energy storage unit 102 outputs self-destruction voltage for damaging the storage unit to each storage unit.

[0060] In the embodiment of the present application, the self-destruction power supply unit 101 can provide self-destruction power for the concurrent self-destruction energy storage unit 102, the self-destruction trigger unit 104 can output a self-destruction control signal after receiving a trigger signal, and the self-destruction switch control unit 103 turns on the path between the concurrent self-destruction energy storage unit and each storage unit under the control of the self-destruction control signal, and outputs self-destruction voltage to each storage unit, so that each storage unit is damaged after receiving the self-destruction voltage. Since the concurrent self-destruction energy storage unit in the present application can provide self-destruction voltage for each storage unit, the self-destruction speed can be improved.

[0061] In addition, the self-destruction circuit provided in the embodiment of the present application outputs self-destruction voltage to each storage unit, and the storage unit can cause damage to the hardware of the storage unit after receiving the self-destruction voltage, so the reliability of self-destruction can be improved.​

[0062] In an embodiment, as shown in Figure 2 The self-destruction circuit provided by the embodiment of the present application can further include a self-destruction control unit 105, wherein:

[0063] The self-destruction control unit 105 is configured to send a start detection signal to the concurrent self-destruction energy storage unit 102 to obtain self-destruction electric energy stored in the concurrent self-destruction energy storage unit 102, and send a stop detection signal to the concurrent self-destruction energy storage unit 102 to stop obtaining the self-destruction electric energy stored in the concurrent self-destruction energy storage unit 102, and output a charging control signal to the concurrent self-destruction energy storage unit 102 to enable the self-destruction power supply unit 101 to provide the self-destruction electric energy for the concurrent self-destruction energy storage unit 102 when the self-destruction electric energy stored in the concurrent self-destruction energy storage unit 102 is less than a target electric energy, and output a stop charging signal to the concurrent self-destruction energy storage unit 102 to enable the self-destruction power supply unit 101 to stop providing the self-destruction electric energy for the concurrent self-destruction energy storage unit 102 when the self-destruction electric energy stored in the concurrent self-destruction energy storage unit 102 is greater than or equal to the target electric energy.

[0064] In the embodiment of the present application, the self-destruction control unit 105 can control the self-destruction power supply unit 101 to charge the concurrent self-destruction energy storage unit 102, and can also control the self-destruction power supply unit 101 to stop charging, so that the self-destruction electric energy in the concurrent self-destruction energy storage unit 102 can be greater than the target electric energy, and thus it can be ensured that the self-destruction voltage can be provided for the storage unit at any time, and the self-destruction reliability can be improved.

[0065] In a specific implementation, as shown in Figure 3 The concurrent self-destruction energy storage unit 102 includes self-destruction energy storage sub-units 1021 corresponding to the storage units, for example, there are n storage units, and there are n self-destruction energy storage sub-units 1021 corresponding to the n storage units, wherein n is a positive integer.

[0066] The first end of each self-destruction energy storage sub-unit 1021 is electrically connected with the self-destruction power supply unit 101, and the second end of each self-destruction energy storage sub-unit 1021 is electrically connected with the self-destruction switch control unit 103.

[0067] As shown in Figure 4 For each self-destruction energy storage sub-unit 1021, the self-destruction energy storage sub-unit 1021 includes an energy storage switch SW, a detection switch SWA, and an energy storage capacitor C, wherein:

[0068] The first end of the energy storage switch SW is electrically connected with the self-destruction power supply unit 101, the second end of the energy storage switch SW is electrically connected with the first end of the energy storage capacitor C, the first end of the detection switch SWA, and the self-destruction switch control unit 103, and the control end of the energy storage switch SW is configured to receive a start charging signal output by the self-destruction control unit 105 for controlling the energy storage switch SW to be closed and a stop charging signal output by the self-destruction control unit 105 for controlling the energy storage switch SW to be opened.

[0069] a second terminal of the energy storage capacitor C is grounded;

[0070] a second terminal of the detection switch SWA is electrically connected with an input terminal of the self-destruction control unit 105, and a control terminal of the detection switch SWA is configured to receive a start detection signal output by the self-destruction control unit 105 for controlling the detection switch SWA to be closed and a stop detection signal output by the self-destruction control unit 105 for controlling the detection switch SWA to be opened;

[0071] the energy storage switch SW is configured to, when closed, conduct a path between the self-destruction power supply unit 101 and the energy storage capacitor C, and when opened, disconnect the path between the self-destruction power supply unit 101 and the energy storage capacitor C;

[0072] the detection switch SWA is configured to, when closed, conduct a path between the energy storage capacitor C and the self-destruction control unit 105, and when opened, disconnect the path between the energy storage capacitor C and the self-destruction control unit 105.

[0073] In the embodiments, the self-destruction control unit 105 can control the energy storage switch SW to be closed to enable the self-destruction power supply unit 101 to charge the energy storage capacitor C, and can control the energy storage switch SW to be opened to enable the self-destruction power supply unit 101 to stop charging the energy storage capacitor C. The self-destruction control unit 105 can also control the detection switch SWA to be closed to obtain the self-destruction electric energy stored in the energy storage capacitor C, and can control the detection switch SWA to be opened to stop obtaining the self-destruction electric energy stored in the energy storage capacitor C.

[0074] In specific embodiments, after the self-destruction control unit 105 is powered on, the self-destruction electric energy stored in the self-destruction energy storage subunit 1021 is less than the target electric energy by default. The self-destruction control unit 105 controls the energy storage switch SW to be closed to enable the self-destruction power supply unit 101 to charge each energy storage capacitor C. During the charging of the energy storage capacitor C, the self-destruction control unit 105 can control the detection switch SWA to be closed to obtain the self-destruction electric energy stored in the energy storage capacitor C. If the self-destruction electric energy stored in the energy storage capacitor C is greater than or equal to the target electric energy, the self-destruction control unit 105 controls the energy storage switch SW to be opened to stop charging the energy storage capacitor C. After the self-destruction control unit 105 obtains the self-destruction electric energy stored in the energy storage capacitor C, the self-destruction control unit 105 controls the detection switch SWA to be opened.

[0075] The self-destruction control unit 105 can periodically acquire the self-destruction electric energy stored in each energy storage capacitor C. If the acquired self-destruction electric energy is less than the target electric energy, the self-destruction control unit 105 controls and closes the energy storage switch SW in the concurrent self-destruction energy storage unit, so that the self-destruction power supply unit 101 provides self-destruction electric energy for the concurrent self-destruction energy storage unit 102. In the process that the self-destruction power supply unit 101 provides self-destruction electric energy for the energy storage capacitor C, the self-destruction control unit 105 detects that the self-destruction electric energy stored in the energy storage capacitor C is greater than or equal to the target electric energy, controls the energy storage switch SW to be opened, so that the self-destruction power supply unit 101 stops providing self-destruction electric energy for the concurrent energy storage capacitor C.

[0076] The self-destruction control unit 105 sends a start charging signal to the energy storage switch SW when controlling the energy storage switch SW to be closed, sends a stop charging signal to the energy storage switch SW when controlling the energy storage switch SW to be opened, sends a start detection signal to the detection switch SWA when controlling the detection switch SWA to be closed, and sends a stop detection signal to the detection switch SWA when controlling the detection switch SWA to be opened.

[0077] In an embodiment, as shown in Figure 5 The self-destruction switch control unit 103 includes self-destruction switches SWD (SWD1, SWD2, …, SWDn) corresponding to the self-destruction energy storage sub-units.

[0078] For each self-destruction switch SWD, the first end of the self-destruction switch SWD is electrically connected to the self-destruction energy storage sub-unit 1021 corresponding thereto, the second end of the self-destruction switch SWD is electrically connected to the storage unit corresponding thereto, and the control end of the self-destruction switch SWD is used to receive a self-destruction control signal.

[0079] The self-destruction switch SWD is used to, after receiving the self-destruction control signal, turn on the path between the self-destruction energy storage sub-unit 1021 and the energy storage unit, so as to output the self-destruction voltage to the energy storage unit.

[0080] In the embodiment, the self-destruction energy storage sub-unit 1021, the self-destruction switch SWD and the energy storage unit are one-to-one corresponding, and the self-destruction control unit 105 can control all self-destruction switches SWD to be closed at the same time, so as to simultaneously provide self-destruction voltage for multiple storage units, thereby improving the self-destruction efficiency.

[0081] In a specific implementation, as shown in Figure 6 The third end of the self-destruction switch SWD is used to receive a power supply voltage VCC.

[0082] The self-destruction switch SWD is further used to, after receiving the self-destruction control signal, disconnect the path between the third end of the self-destruction switch SWD and the second end of the self-destruction switch SWD.

[0083] In the embodiment of the present application, the third end of the self-destruction switch SWD and the second end of the self-destruction switch SWD are in a conductive state, that is, before self-destruction, the energy storage unit is powered by VCC, when the self-destruction switch SWD receives a self-destruction signal, the path is switched from the third end of the self-destruction switch SWD and the second end of the self-destruction switch SWD to the first end of the self-destruction switch SWD and the second end of the self-destruction switch SWD, after switching, the storage unit receives the self-destruction voltage input by the first end of the self-destruction switch SWD, thereby self-destruction of the energy storage unit.

[0084] In the present application, VCC is the normal working power supply, and the self-destruction switch SWD can realize switching control of the normal working power supply VCC and the self-destruction voltage output by each energy storage capacitor. When a self-destruction control signal is received, the self-destruction voltage of all branches can be simultaneously and independently input into each storage unit to achieve the purpose of concurrent destruction of the key.

[0085] In one embodiment, as shown in Figure 7 The concurrent self-destruction energy storage unit 102 can further include a buffer circuit 1022, the positive input end of the buffer circuit 1022 is electrically connected with the second end of each detection switch SWA, and the negative input end of the buffer circuit 1022 is electrically connected with the output end of the buffer circuit 1022 and the self-destruction control unit 105.

[0086] The energy storage signal is input into the buffer circuit 1022, the buffer circuit 1022 outputs a to-be-detected signal to the self-destruction control unit 105, the self-destruction control unit 105 performs analog-to-digital conversion on the to-be-detected signal, and compares the converted digital signal with the target electric energy, thereby realizing monitoring of the energy storage energy.

[0087] In a specific implementation, the buffer circuit 1022 can be a buffer.

[0088] In a specific implementation, after the self-destruction switch control unit 103 receives a self-destruction control signal, the self-destruction voltage is output to the storage unit, the self-destruction control signal is output by the self-destruction trigger unit 104, and the self-destruction trigger unit 104 outputs the self-destruction control signal when receiving a trigger signal.

[0089] The trigger signal in the embodiment of the present application can be output by the anti-disassembly detection unit 106, as shown in Figure 8 That is, the self-destruction circuit disclosed in the present application can further include an anti-disassembly detection unit 106, the anti-disassembly detection unit 106 is used to output a trigger signal after detecting a disassembly signal.

[0090] Specifically, as shown in Figure 9 The anti-disassembly detection unit 106 can include a case anti-disassembly detection unit 1061 and a battery anti-disassembly detection unit 1062, and outputs a trigger signal after the case anti-disassembly detection unit 1061 and / or the battery anti-disassembly detection unit 1062 detects a disassembly signal.

[0091] The shell anti-disassembly detection unit 1061 can be implemented by a shell anti-disassembly contact. When the shell is forcibly disassembled, the shell anti-disassembly contact will be disconnected. After the shell anti-disassembly detection unit 1061 detects that the shell anti-disassembly contact is disconnected, a trigger signal is output. The battery anti-disassembly detection unit 1062 can be implemented by a battery anti-disassembly contact. When the battery is disassembled, the battery anti-disassembly contact will be disconnected. After the battery anti-disassembly detection unit 1062 detects that the battery anti-disassembly contact is disconnected, a trigger signal is output.

[0092] It should be noted that the present application can include multiple shell anti-disassembly contacts and multiple battery anti-disassembly contacts. Disconnection of any one of the shell anti-disassembly contacts or any one of the battery anti-disassembly contacts can output a trigger signal.

[0093] In specific implementation, the trigger signal can be output by the self-destruction control unit 105 in addition to being output by the anti-disassembly detection unit 106. The self-destruction control unit 105 is also used to output a trigger signal when it is determined to be abnormal.

[0094] As shown in Figure 10 , the output end of the self-destruction control unit 105 is electrically connected to the self-destruction trigger unit 104, for outputting a trigger signal to the self-destruction trigger unit when it is determined to be abnormal.

[0095] The self-destruction control unit 105 can generate a specific encoding signal when the self-destruction circuit is working normally. At the moment of destruction of the self-destruction control unit 105, the encoding signal is distorted, thereby outputting a trigger signal.

[0096] In specific implementation, the output of the pulse signal can be implemented using the pulse output mode of the PWM module of the MCU. The pulse signal is latched by the R-S flip-flop circuit to output a trigger signal.

[0097] For example, as shown in Figure 15 , the self-destruction control unit 105 includes an MCU, a PWM module, and an R-S flip-flop 1051. The PWM module can output two signals S and Sn. When the MCU is normal, the PWM module outputs a specific encoding signal, for example, signal S is 0 and signal Sn is 1. When the MCU is abnormal, the PWM module outputs an abnormal encoding signal, that is, the specific encoding signal is inverted, so that signal S is inverted to 1 and signal Sn is inverted to 0. The R-S flip-flop 1051 latches the abnormal encoding signal to output a trigger signal.

[0098] It should be noted that when the MCU is abnormal, the abnormal encoding signal output by the PWM module is a transient signal, that is, after the PWM module outputs the abnormal encoding signal, it still outputs the specific encoding signal.

[0099] In the embodiment of the present application, the PWM module is reset before the pulse output is reversed in the normal working condition of the MCU; when the MCU is interfered to cause program exception or partial circuit damage, the PWM module will output a pulse type protection signal, that is, an exception encoding signal, and the exception encoding signal starts the self-destruction function through the R-S flip-flop 1051 circuit to destroy the storage data in the form of destroying the storage unit.

[0100] As shown in Figure 16 The R-S flip-flop 1051 provided by the embodiment of the present application includes NAND gate NAND1, NAND gate NAND2, XOR gate XOR1 and XOR gate XOR2, the first input end of the NAND gate NAND1 is the input end S of the R-S flip-flop 1051, used for receiving the signal S, the second input end of the NAND gate NAND1 is electrically connected with the first input end of the NAND gate NAND2 and the second input end of the NAND gate NAND2, and is used as the input end C of the R-S flip-flop 1051 and the input end R of the R-S flip-flop 1051, for inputting the signal Sn, the output end of the NAND gate NAND1 is electrically connected with the first input end of the XOR gate XOR1, the second input end of the XOR gate XOR1 is electrically connected with the output end of the XOR gate XOR2, and is used as the output end Qn of the R-S flip-flop 1051, the output end of the NAND gate NAND2 is electrically connected with the second input end of the XOR gate XOR2, the first input end of the XOR gate XOR2 is electrically connected with the output end of the XOR gate XOR1, and is used as the output end Q of the R-S flip-flop 1051, for outputting the trigger signal.

[0101] In the embodiment of the present application, the self-destruction trigger unit 104 can include a plurality of AND gates, as shown in Figure 11 The input end of the first-stage AND gate is used for inputting the trigger signal, the output end of the previous-stage AND gate is electrically connected with the input end of the next-stage AND gate, and the output end of the last-stage AND gate is used for outputting the self-destruction control signal.

[0102] In the embodiment of the present application, the trigger signal is ANDed through the AND gate, and finally the self-destruction control signal is outputted, so that the self-destruction control signal can be outputted as long as one trigger signal is a valid signal.

[0103] For example, Figure 11 In the embodiment of the present application, the self-destruction trigger unit 104 includes 15 AND gates, wherein the first-stage AND gate includes AND gate AND1, AND gate AND2, AND gate AND3, AND gate AND4, AND gate AND5, AND gate AND6, AND gate AND7 and AND gate AND8, and the last-stage AND gate includes AND gate AND15, the input end of the first-stage AND gate inputs 16 trigger signals, and the output end of the last-stage AND gate outputs the self-destruction control signal.

[0104] As shown in Figure 12As shown, another structure schematic diagram of the self-destruction circuit provided by the embodiment of the present application is shown, wherein the self-destruction circuit includes three self-destruction energy storage sub-units 1021, the first self-destruction energy storage sub-unit 1021 includes an energy storage switch SW1, a detection switch SWA1 and an energy storage capacitor C1, the second self-destruction energy storage sub-unit 1021 includes an energy storage switch SW2, a detection switch SWA2 and an energy storage capacitor C2, the third self-destruction energy storage sub-unit 1021 includes an energy storage switch SW3, a detection switch SWA3 and an energy storage capacitor C3, the first self-destruction energy storage sub-unit 1021 corresponds to a self-destruction switch SWD1, the second self-destruction energy storage sub-unit 1021 corresponds to a self-destruction switch SWD2, and the third self-destruction energy storage sub-unit 1021 corresponds to a self-destruction switch SWD3, the self-destruction switch SWD1 is connected with the storage unit 1, the self-destruction switch SWD2 is connected with the energy storage unit 2, and the self-destruction switch SWD3 is connected with the energy storage unit 3.

[0105] When the self-destruction switch SWD1 is closed, the output self-destruction voltage output by the energy storage capacitor C1 is output to the storage unit 1 to destruct the storage unit 1; when the self-destruction switch SWD2 is closed, the output self-destruction voltage output by the energy storage capacitor C2 is output to the storage unit 2 to destruct the storage unit 2; and when the self-destruction switch SWD3 is closed, the output self-destruction voltage output by the energy storage capacitor C3 is output to the storage unit 3 to destruct the storage unit 3.

[0106] In an embodiment, as shown in the figure, the self-destruction power supply unit 101 includes a main system power supply module 1011, a self-destruction system power supply module 1012, a power management module 1013 and a boost module 1014, wherein: Figure 13 The output end of the main system power supply module 1011 is electrically connected with the first input end of the battery management module 1013, the output end of the self-destruction system power supply module 1012 is electrically connected with the second input end of the battery management module 1013, the output end of the power management module 1013 is electrically connected with the input end of the boost module 1014, and the output end of the boost module 1014 is electrically connected with the concurrent self-destruction energy storage unit 102;

[0107] The main system power supply module 1011 is configured to output a first voltage.

[0108] The self-destruction system power supply module 1012 is configured to output a second voltage.

[0109] The power management module 1013 is configured to select one of the first voltage and the second voltage to output under the control of the self-destruction control unit 105.

[0110] The boost module 1014 is configured to perform boost processing on the voltage output by the power management module 1013.

[0111]

[0112] ​In specific implementation, the main system power supply module 1011 can be the main system battery component, the self-destruct system power supply module 1012 can be the self-destruct system battery component, the power management unit 1013 can be a single-pole double-throw switch, and the boost module 1014 can be a boost chip or a boost circuit.

[0113] In this embodiment, the power management module 1013 manages the switching between two power supplies to provide a normal power output for the self-destruct circuit. The boost module 1014 performs power boosting processing and outputs a high-voltage signal.

[0114] The main system power supply module 1011 outputs a first voltage VP1, and the self-destruct system power supply module 1012 outputs a second voltage VP2. Both the first voltage VP1 and the second voltage VP2 are input to the power management module 1013. Under the control of the self-destruct control unit 105, the single-pole double-throw switch of the power management module 1013 outputs either the first voltage VP1 or the second voltage VP2.

[0115] Specifically, the self-destruct control unit 105 outputs a voltage control signal to the power management module 1013 based on the first voltage VP1 and the second voltage VP2. If the self-destruct control unit 105 detects that both the main system power supply module and the self-destruct system power supply module exist (i.e., neither the main system power supply module anti-tamper signal nor the self-destruct system power supply module anti-tamper signal is detected), then the power management module 1013 outputs the first voltage VP1. If the main system power supply module exists and the self-destruct system power supply module anti-tamper signal is detected, then the power management module 1013 outputs the first voltage VP1. If the main system power supply module anti-tamper signal is detected and the self-destruct system power supply module exists, then the power management module 1013 outputs the second voltage VP2.

[0116] like Figure 14 As shown, the power management module 1013 is a single-pole double-throw switch K. The first end of the single-pole double-throw switch K is electrically connected to the input end of the boost module 1014, the second end of the single-pole double-throw switch K is electrically connected to the output end of the main system power supply module 1011, and the third end of the single-pole double-throw switch K is electrically connected to the output end of the self-destruct system power supply module 1012.

[0117] In the embodiment, when the main system power supply module 1011 and the self-destruction system power supply module 1012 can supply power, the passage between the first end of the single-pole double-throw switch K and the second end of the single-pole double-throw switch K is controlled, and the first voltage VP1 to VP is output; when the main system power supply module 1011 can supply power and the self-destruction system power supply module 1012 cannot supply power, the passage between the first end of the single-pole double-throw switch K and the second end of the single-pole double-throw switch K is controlled, and the first voltage VP1 to VP is output; when the main system power supply module 1011 cannot supply power and the self-destruction system power supply module 1012 can supply power, the passage between the first end of the single-pole double-throw switch K and the third end of the single-pole double-throw switch K is controlled, and the second voltage VP2 is output.

[0118] The boost module 1014 can realize voltage boosting of the electric energy VP and output a self-destruction voltage. In a specific implementation, the self-destruction voltage is between 30v and 36v.

[0119] In an embodiment, the self-destruction control unit 105 can also perform key destruction result detection. The self-destruction control unit 105 is electrically connected to the second end of each key destruction switch SWD and is configured to detect the current size of the power input end of each storage unit and determine whether the self-destruction is successful according to the current size.

[0120] The self-destruction control unit 105 detects the current of the power input end of the storage unit. Before self-destruction of the storage unit, the self-destruction control unit 105 obtains the current value I1 of the power input end of the storage unit. After self-destruction of the storage unit, the self-destruction control unit 105 obtains the current value I2 of the power input end of the storage unit. If I2 approaches 0 mA, it is determined that the self-destruction is successfully executed. If I2 is much greater than I1, for example, I2 is greater than or equal to 10×I1, it is determined that the self-destruction is successfully executed. Otherwise, it is determined that the self-destruction is not successful.

[0121] When the self-destruction control unit 105 detects that the self-destruction is not successful, the energy storage capacitor of the branch can be recharged, and the self-destruction of the branch is initiated again.

[0122] For example, before self-destruction of the storage unit, the self-destruction control unit 105 detects that the current of the power input end of the storage unit 1 is 5A. After self-destruction of the storage unit, the self-destruction control unit 105 detects that the current of the power input end of the storage unit 1 is 0A. It is determined that the self-destruction of the storage unit 1 is successful.

[0123] For example, before the storage cell self-destructs, the self-destruct control unit 105 detects a current of 5A at the power supply terminal of storage cell 1. After the storage cell self-destructs, the self-destruct control unit 105 detects a current of 50A at the power supply terminal of storage cell 1, thus determining that the self-destruction of storage cell 1 failed. Since the self-destruction of storage cell 1 failed, the self-destruct control unit 105 controls the energy storage capacitor C corresponding to storage cell 1 to charge. After charging is complete, it controls the output of a self-destruct voltage to storage cell 1, attempting to self-destruct storage cell 1 again.

[0124] Specifically, the self-destruct control unit 105 can determine whether the self-destruction was successful by measuring the power input pin corresponding to each storage unit through the ADC circuit of the MCU of the control system.

[0125] Based on the same concept, this application also provides an electronic device. The principle of this electronic device in solving the problem is similar to that of any of the self-destruct circuits described above, and the repetitions will not be repeated.

[0126] The electronic device provided in this application includes multiple energy storage units and any of the self-destruct circuits described above.

[0127] Based on the same concept, this application also provides a self-destruction method applicable to any of the above self-destruction circuits. The principle of this method in solving the problem is similar to that of any of the above self-destruction circuits, and the repeated parts will not be described again.

[0128] like Figure 17 As shown, an embodiment of this application provides a self-destruction method applied to the aforementioned self-destruct circuit, which specifically includes the following steps:

[0129] S1701. After the electronic device is powered on, the self-destruct control unit controls each energy storage switch to close, so as to provide self-destruct power to each energy storage capacitor;

[0130] S1702, The self-destruct control unit controls the closure of each detection switch to obtain the self-destruct energy stored in each energy storage capacitor;

[0131] S1703. After acquiring the self-destruct energy stored in each energy storage capacitor, the self-destruct control unit controls each detection switch to disconnect.

[0132] S1704. After the self-destruct control unit determines that the self-destruct energy stored in the energy storage capacitor is greater than or equal to the target energy, it controls the disconnection of the energy storage switch corresponding to the energy storage capacitor to stop supplying power to the energy storage capacitor.

[0133] S1705 After receiving the trigger signal, the self-destruct triggering unit controls each self-destruct switch to open the path between the first and second terminals of each self-destruct switch, so that each energy storage capacitor outputs a self-destruct voltage to self-destruct the energy storage unit.

[0134] S1706, after the self-destruction is completed, the self-destruction triggering unit controls each self-destruction switch to turn off the path between the first end and the second end of each self-destruction switch, so that each energy storage capacitor stops outputting the self-destruction voltage;

[0135] It should be noted that here, after the self-destruction is completed, it can be after a preset time.

[0136] S1707, the self-destruction triggering unit obtains the current of each energy storage unit power supply end, judges whether the self-destruction of the energy storage unit is successful according to the current, if yes, S1709 is executed, otherwise, S1708 is executed;

[0137] S1708, the self-destruction triggering unit controls the self-destruction switch corresponding to the energy storage unit which fails to self-destruct to be turned on, and the energy storage unit is self-destructed again;

[0138] S1709, the self-destruction control unit periodically controls each detection switch to be turned on to obtain the self-destruction energy stored in each energy storage capacitor, and returns to step S1703.

[0139] It should be noted that step S1709 is not necessarily after step S1707 and step S1708, step S1709 is to periodically obtain the self-destruction energy stored in the energy storage capacitor, so this step can be performed at any time, Figure 17 The above merely illustrates an embodiment.

[0140] The self-destruction circuit and the electronic device provided by the application, wherein the self-destruction power supply unit can provide self-destruction energy to the concurrent self-destruction energy storage unit, the self-destruction triggering unit can output a self-destruction control signal after receiving a trigger signal, and the self-destruction switch control unit can turn on the path between the concurrent self-destruction energy storage unit and each storage unit under the control of the self-destruction control signal, and output a self-destruction voltage to each storage unit, so that each storage unit is damaged after receiving the self-destruction voltage. Since the concurrent self-destruction energy storage unit in the application can simultaneously provide a self-destruction voltage to each storage unit, the self-destruction speed can be improved.

[0141] Those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application also intends to include these modifications and variations.

Claims

1. A self-destroying circuit, characterized by, The self-destruction circuit comprises a self-destruction power supply unit, a concurrent self-destruction energy storage unit, a self-destruction switch control unit and a self-destruction trigger unit, wherein: The self-destruction power supply unit is configured to provide self-destruction power for the concurrent self-destruction energy storage unit, so that the concurrent self-destruction energy storage unit stores self-destruction power for damaging the storage unit. The self-destruction trigger unit is configured to output a self-destruction control signal after receiving a trigger signal. The self-destruction switch control unit is configured to, under the control of the self-destruction control signal, turn on a path between the concurrent self-destruction energy storage unit and each storage unit, so that the concurrent self-destruction energy storage unit outputs self-destruction voltage for damaging the storage unit to each storage unit. The self-destruction circuit further comprises a self-destruction control unit, wherein: The self-destruction control unit is configured to send a start detection signal to the concurrent self-destruction energy storage unit to obtain self-destruction power stored in the concurrent self-destruction energy storage unit, and send a stop detection signal to the concurrent self-destruction energy storage unit to stop obtaining self-destruction power stored in the concurrent self-destruction energy storage unit, and output a charging control signal to the concurrent self-destruction energy storage unit when self-destruction power stored in the self-destruction control unit is less than target power, so that the self-destruction power supply unit provides self-destruction power for the concurrent self-destruction energy storage unit, and output a stop charging signal to the concurrent self-destruction energy storage unit when self-destruction power stored in the concurrent self-destruction energy storage unit is greater than or equal to the target power, so that the self-destruction power supply unit stops providing self-destruction power for the concurrent self-destruction energy storage unit. The concurrent self-destruction energy storage unit comprises self-destruction energy storage subunits corresponding to the storage units, and a plurality of self-destruction energy storage subunits are connected in parallel, and for each self-destruction energy storage subunit, the self-destruction energy storage subunit comprises an energy storage switch, a detection switch and an energy storage capacitor, wherein: The first end of the energy storage switch is electrically connected with the self-destruction power supply unit, the second end of the energy storage switch is electrically connected with the first end of the energy storage capacitor, the first end of the detection switch and the self-destruction switch control unit, and the control end of the energy storage switch is configured to receive a first switch control signal output by the self-destruction control unit for controlling the energy storage switch to close and a second switch control signal output by the self-destruction control unit for controlling the energy storage switch to open. The second end of the energy storage capacitor is grounded. The second end of the detection switch is electrically connected with the input end of the self-destruction control unit, and the control end of the detection switch is configured to receive a third switch control signal output by the self-destruction control unit for controlling the detection switch to close and a fourth switch control signal output by the self-destruction control unit for controlling the detection switch to open. The energy storage switch is configured to, after being closed, turn on a path between the self-destruction power supply unit and the energy storage capacitor, and after being opened, disconnect the path between the self-destruction power supply unit and the energy storage capacitor. The detection switch is configured to, after being closed, turn on a path between the energy storage capacitor and the self-destruction control unit, and after being opened, disconnect the path between the energy storage capacitor and the self-destruction control unit. The self-destruction control unit is further configured to output the trigger signal when it is determined that the self-destruction control unit is abnormal.

2. The circuit of claim 1, wherein, The self-destruction circuit further comprises a tamper detection unit, wherein:

3. The circuit of claim 1, wherein, ​ The anti-disassembly detection unit is configured to output the trigger signal after detecting the disassembly signal.

4. The circuit of claim 1, wherein, The self-destruction switch control unit comprises a self-destruction switch corresponding to the self-destruction energy storage subunit, wherein: For each self-destruction switch, a first end of the self-destruction switch is electrically connected to the self-destruction energy storage subunit corresponding thereto, a second end of the self-destruction switch is electrically connected to the storage unit corresponding thereto, and a control end of the self-destruction switch is configured to receive the self-destruction control signal; The self-destruction switch is configured to, after receiving the self-destruction control signal, turn on a path between the self-destruction energy storage subunit and the energy storage unit to output the self-destruction voltage to the energy storage unit.

5. The circuit of claim 4, wherein, A third end of the self-destruction switch is configured to receive a power supply voltage of the energy storage unit corresponding thereto; The self-destruction switch is further configured to, after receiving the self-destruction control signal, turn off a path between the third end of the self-destruction switch and the second end of the self-destruction switch.

6. The circuit of claim 1, wherein, The concurrent self-destruction energy storage unit further comprises a buffer circuit; A positive input end of the buffer circuit is electrically connected to the second end of each detection switch, and a negative input end of the buffer circuit is electrically connected to an output end of the buffer circuit and the self-destruction control unit; The buffer circuit is configured to input an energy storage signal and output a to-be-detected signal to the self-destruction control unit.

7. The circuit of claim 1, wherein, The self-destruction power supply unit comprises a main system power supply module, a self-destruction system power supply module, a power management module, and a boost module, wherein: An output end of the main system power supply module is electrically connected to a first input end of the power management module, an output end of the self-destruction system power supply module is electrically connected to a second input end of the power management module, an output end of the power management module is electrically connected to an input end of the boost module, a control end of the power management module is signal-connected to the self-destruction control unit, and an output end of the boost module is electrically connected to the concurrent self-destruction energy storage unit; The self-destruction control unit is further configured to output a voltage control signal for controlling the power management module according to a first voltage output by the main system power supply module and a second voltage output by the self-destruction system power supply module; The power management module is configured to select one of the first voltage and the second voltage for output under control of the voltage control signal; The boost module is configured to perform boost processing on the voltage output by the power management module.

8. An electronic device, comprising: The self-destruction circuit comprises a plurality of energy storage units and the self-destruction circuit according to any one of claims 1-7.

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