Control circuit of energy storage equipment and energy storage equipment

Abstract

The invention provides a control circuit of energy storage equipment and the energy storage equipment. The control circuit of the energy storage equipment comprises a self-reset switch, wherein a first end of the self-reset switch is connected with a positive electrode of a battery pack; the first end of the voltage division circuit is connected with the second end of the self-reset switch, and the second end of the voltage division circuit is grounded; the first end of the switching circuit is connected with the positive electrode of the battery pack, the second end of the switching circuit is grounded, and the switching circuit is connected with the second end of the self-reset switch; the power supply end of the micro-control unit is connected with the third end of the switching circuit, and the switching control end of the micro-control unit is connected with the switching circuit; wherein under the condition that the self-reset switch is switched on, the first end of the self-reset switch is communicated with the second end of the self-reset switch, the switching circuit is switched on, and the micro-control unit is used for controlling the switching circuit to be switched on or switched off according to a level signal on the voltage division circuit. According to the technical scheme, the risk of failure of the self-reset switch is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage devices, and in particular to a control circuit of an energy storage device and an energy storage device. Background Art

[0002] In related technologies, such as Figure 1 As shown, the energy storage device 200' includes a battery pack 202' and a control circuit 100' of the energy storage device, wherein the control circuit 100' of the energy storage device includes an analog front end chip 102' (Analog Front End, AFE), a microcontroller unit 104' (Microcontroller Unit, MCU), a switch device K', a charging switch tube CHG', a discharging switch tube DSG', a pre-charging switch tube PDSG', a pre-charging resistor RS', a first diode D1' and a voltage conversion circuit 106'. The control circuit 100' of the energy storage device uses the switch device K' to directly close and open to realize power-on and power-off.

[0003] If the switch device K' is directly closed and opened to realize power-on and power-off, the switch device K' will remain in the on state after power-on, which may cause failure risk and affect the reliability of the control circuit 100' of the energy storage device. Summary of the invention

[0004] The present invention aims to at least solve the technical problem in the prior art or related art that the switch device always remains in the on state, there is a risk of failure, and the reliability of the control circuit of the energy storage device is affected.

[0005] To this end, a first aspect of the present invention is to provide a control circuit for an energy storage device.

[0006] A second aspect of the present invention provides an energy storage device.

[0007] In view of this, according to a first aspect of the present invention, the present invention provides a control circuit of an energy storage device, the energy storage device includes a battery pack, and the control circuit of the energy storage device includes: a self-resetting switch, wherein the first end of the self-resetting switch is connected to the positive electrode of the battery pack; a voltage divider circuit, wherein the first end of the voltage divider circuit is connected to the second end of the self-resetting switch, and the second end of the voltage divider circuit is grounded; a switch circuit, wherein the first end of the switch circuit is connected to the positive electrode of the battery pack, the second end of the switch circuit is grounded, and the switch circuit is connected to the second end of the self-resetting switch; a microcontroller unit, wherein the power supply end of the microcontroller unit is connected to the third end of the switch circuit, and the switch control end of the microcontroller unit is connected to the switch circuit; wherein, when the self-resetting switch is turned on, the first end of the self-resetting switch is connected to the second end of the self-resetting switch, the switch circuit is turned on, and the microcontroller unit is used to control the switch circuit to be turned on or off according to the level signal on the voltage divider circuit.

[0008] The present invention proposes a control circuit of an energy storage device, which includes a self-resetting switch, a voltage divider circuit, a switch circuit and a micro control unit. When the self-resetting switch is turned on, the switch circuit can be controlled to be turned on, thereby supplying power to the micro control unit, and the micro control unit can control the switch circuit to be turned on or off according to a level signal on the voltage divider circuit after power is turned on.

[0009] Obviously, in the above technical solution, the self-reset switch can be used to control the conduction of the switch circuit to temporarily power the microcontroller unit, and the microcontroller unit can use the level signal on the voltage divider circuit to know the user's intention to operate the self-reset switch, and control the switch circuit to be turned on or off according to the detected user's intention to operate the self-reset switch. In this process, the self-reset switch only plays the role of receiving the user's operation, and it can be disconnected after the user's operation, so that when the switch circuit is turned on, there is no need to keep the self-reset switch turned on all the time. Therefore, the risk of failure of the self-reset switch is reduced, and the reliability of the control circuit of the energy storage device is improved without affecting the operation of the control circuit of the energy storage device.

[0010] In some technical solutions, optionally, the self-resetting switch is a spring reset button.

[0011] In addition, the control circuit of the energy storage device proposed by the present invention also has the following additional technical features.

[0012] In some technical schemes, optionally, the micro control unit is specifically used to: determine, based on the level signal on the voltage divider circuit, that the duration for which the level on the voltage divider circuit is greater than or equal to the first level is greater than or equal to the first duration, and determine that a power-on signal is detected; when the power-on signal is detected, the micro control unit outputs a second level, and the switching circuit is in a conductive state in response to the second level; and based on the level on the voltage divider circuit decreasing from the first level to the third level, the micro control unit continuously outputs the second level; wherein the second level is greater than the third level.

[0013] In this technical solution, when the user presses the self-reset switch, the self-reset switch is turned on, at which time, the first end of the self-reset switch is connected to the second end of the self-reset switch, and when the self-reset switch is turned on, the switch circuit is turned on. Since the first end of the switch circuit is connected to the positive electrode of the battery pack, and the third end of the switch circuit is connected to the power supply end of the micro control unit, when the switch circuit is turned on, the positive electrode of the battery pack is connected to the power supply end of the micro control unit, and at this time, the micro control unit is powered on and detects the level signal on the voltage divider circuit.

[0014] If the level signal on the voltage divider circuit determines that the level on the voltage divider circuit is greater than or equal to the first level and the duration is greater than or equal to the first duration, it is determined that the user's operation intention is to power on the micro control unit. At this time, it is determined that the power-on signal is detected, and when the power-on signal is detected, the second level is output to control the switch circuit to be turned on. When the micro control unit detects that the level on the voltage divider circuit drops from the first level to the third level, it is determined that the user resets the self-reset switch. At this time, the second level is continuously output so that the micro control unit can remain powered on and work.

[0015] In some technical solutions, optionally, the first duration can be determined according to actual usage needs, which will not be elaborated here.

[0016] Exemplarily, the first duration is 2 seconds.

[0017] In some technical schemes, optionally, the micro control unit is specifically used to: determine, based on the level signal on the voltage divider circuit, that the level on the voltage divider circuit increases from the third level to the first level, and remains greater than or equal to the first level for a duration greater than or equal to a second duration, and determine that a power-off signal is detected; when the micro control unit detects the power-off signal, the micro control unit stops outputting the second level, and outputs the fourth level, and the switch circuit is in an off state in response to the fourth level, wherein the second level is greater than the fourth level, and the second duration is greater than the first duration.

[0018] In this technical solution, after the microcontroller unit is powered on, the level on the voltage divider circuit will drop to the third level. If the user operates the self-reset switch again, the self-reset switch will be turned on again. Obviously, the level on the voltage divider circuit will increase.

[0019] Based on this, if the level signal on the voltage divider circuit determines that the level on the voltage divider circuit increases from the third level to the first level, and remains greater than or equal to the first level for a duration greater than or equal to the second duration, it is determined that the user's operation intention is to power off the micro control unit. At this time, it is determined that the power-off signal is detected. At this time, the micro control unit stops outputting the second level and outputs the fourth level so that the switching circuit can be turned off in response to the fourth level.

[0020] During this process, the self-resetting switch can automatically reset after the user's operation. Therefore, after power is off, the self-resetting switch can remain in the disconnected state, and there is no need to keep the self-resetting switch turned on all the time. Therefore, the risk of failure of the self-resetting switch is reduced, and the reliability of the control circuit of the energy storage device is improved without affecting the operation of the control circuit of the energy storage device.

[0021] In some technical solutions, the second duration can be determined according to actual usage needs, which will not be elaborated here.

[0022] Exemplarily, the second duration is 6 seconds.

[0023] In some technical schemes, optionally, the control circuit of the energy storage device also includes a charging switch tube and a discharging switch tube, the first end of the charging switch tube is connected to the positive electrode of the battery pack, the first end of the discharging switch tube is connected to the second end of the charging switch tube, and the second end of the discharging switch tube is connected to the positive output end, and the microcontroller unit is also used for: when the switching circuit is turned on, determining based on the level signal on the voltage divider circuit that the level on the voltage divider circuit is greater than or equal to the first level and the duration is greater than or equal to the third duration and less than the second duration, and determining that a start signal is detected; when the microcontroller unit detects the start signal, the microcontroller unit drives the charging switch tube and the discharging switch tube to turn on; wherein, the third duration is greater than the first duration.

[0024] In this technical solution, the charging switch tube and the discharging switch tube will not be turned on at the moment the microcontroller unit is powered on. Therefore, the risk of short circuit and electric shock in the control circuit of the energy storage device can be reduced, thereby improving the reliability of the control circuit of the energy storage device.

[0025] Specifically, in the related technical solution, the charging switch tube and the discharging switch tube will automatically turn on after the microcontroller unit completes the power-on self-test, and then output voltage to the outside.

[0026] In the technical solution of the present invention, when the switch circuit is turned on, the microcontroller unit can draw power from the battery pack and then power on for self-test. If the user operates the self-reset switch again, a level greater than or equal to the first level will be formed on the voltage divider circuit. If the duration of the level is greater than or equal to the third duration, it is determined that the user's operation intention is to output power. At this time, it is determined that the start signal is detected, so that the microcontroller unit responds to the start signal to control the charging switch tube and the discharging switch tube to be turned on, thereby achieving external output voltage.

[0027] During this process, the user can control whether to output power to the outside by operating the self-resetting switch, reducing the risk of short circuit and electric shock and improving the reliability of the control circuit of the energy storage device.

[0028] In some technical solutions, optionally, the third duration can be determined according to actual usage needs, which will not be described in detail here.

[0029] Exemplarily, the third duration is greater than or equal to 3 seconds and less than 6 seconds.

[0030] Exemplarily, the third duration is 3 seconds.

[0031] In some technical schemes, optionally, the control circuit of the energy storage device also includes: a pre-charging switch tube, the first end of the pre-charging switch tube is connected to the second end of the charging switch tube, and the control end of the pre-charging switch tube is connected to the first driving end of the micro control unit; a pre-charging resistor, the first end of the pre-charging resistor is connected to the second end of the pre-charging switch tube; a first diode, the anode of the first diode is connected to the second end of the pre-charging resistor, and the cathode of the first diode is connected to the positive output end; wherein the micro control unit is used to: drive the pre-charging switch tube to turn on when a start signal is detected.

[0032] In this technical solution, the pre-charging switch tube, the pre-charging resistor and the first diode constitute a pre-charging circuit. When a start signal is detected, the pre-charging switch tube is controlled to be turned on, so that the control circuit output of the energy storage device supplies power.

[0033] In this process, the pre-charging circuit can be used for pre-charging, which can extend the service life of the device to be charged connected to the energy storage device, thereby reducing the replacement frequency of the battery in the device to be charged and increasing the service life of the device to be charged.

[0034] In some technical solutions, optionally, the pre-charge switch tube is an N-type metal oxide semiconductor (Negative channel-Metal-Oxide-Semiconductor, NMOS).

[0035] In some technical solutions, optionally, the control circuit of the energy storage device also includes: an analog front-end chip, the input end of the analog front-end chip is connected to the second driving end of the microcontroller unit, and the output end of the analog front-end chip is connected to the control end of the charging switch tube and the control end of the discharging switch tube; wherein the microcontroller unit drives the charging switch tube and the discharging switch tube to be turned on through the analog front-end chip.

[0036] In this technical solution, an analog front-end chip is provided so as to utilize the analog front-end chip to realize indirect control of the charging switch tube and the discharging switch tube.

[0037] In the above technical solution, the analog front-end chip (Analog Front End, AFE) can be used to measure parameters such as the voltage and temperature of the battery pack, estimate the remaining capacity of the battery pack, control the charging and discharging process, issue abnormal alarms and protection, such as overcharging, over-discharging, over-temperature, etc., and perform balancing control to ensure that the status of each single cell in the battery pack is uniform.

[0038] In this process, the control of the charging switch tube and the discharging switch tube can be ensured while improving the reliability of the energy storage device.

[0039] In some technical solutions, optionally, the control circuit of the energy storage device also includes: a light emitting diode, which is connected to a micro control unit; the micro control unit is also used to: control the light emitting diode to be always on based on detecting a power-on signal; control the light emitting diode to be off based on detecting a power-off signal; and control the light emitting diode to flash based on detecting a start signal.

[0040] In this technical solution, the light emitting diodes are able to present different display effects according to different signals detected by the micro control unit.

[0041] During this process, users can determine the status of the control circuit of the energy storage device based on whether the LED is always on, flashing or off. Operators can use visual information to identify the correctness of the operation and reduce the possibility of misoperation and operation failure.

[0042] In some technical schemes, optionally, the voltage divider circuit includes: a first resistor, a first end of the first resistor is connected to the second end of the self-resetting switch; a second resistor, a first end of the second resistor is connected to the second end of the first resistor, and the second end of the second resistor is grounded; wherein the level signal on the voltage divider circuit is the level signal at the first end of the second resistor.

[0043] In this technical solution, after the first resistor and the second resistor are connected in series, they are respectively connected to the second end of the self-reset switch and grounded, so that when the self-reset switch is turned on, the positive electrode of the battery pack can be grounded through the first resistor and the second resistor, and then a voltage drop is formed between the first resistor and the second resistor. The microcontroller unit can know the opening and closing state of the self-reset switch according to the level signal at the first end of the second resistor, thereby estimating the user's motivation and realizing accurate identification of power-on, power-off and startup.

[0044] During this process, the self-resetting switch is in the on state only when operated by the user, so it does not need to be kept on all the time, thereby extending the service life of the self-resetting switch.

[0045] In some technical solutions, optionally, the control circuit of the energy storage device further includes: a third resistor, which is connected in series between the first end of the self-resetting switch and the positive electrode of the battery pack.

[0046] In this technical solution, a third resistor is set so that the resistance value of the loop in which the voltage divider circuit is located can be increased by utilizing the third resistor. Obviously, when the loop resistance is increased, the current in the loop will be reduced, thereby reducing the current value when the self-reset switch is working, thereby extending the service life of the self-reset switch.

[0047] In some technical schemes, optionally, the control circuit of the energy storage device includes a trigger and a voltage conversion circuit, the switch control end is connected to the input end of the trigger, and the switch circuit includes: a first switch tube, the first end of the first switch tube is connected to the positive electrode of the battery pack, the second end of the first switch tube is connected to the input end of the voltage conversion circuit, and the output end of the voltage conversion circuit is connected to the power supply end of the micro control unit; a fourth resistor, the first end of the fourth resistor is connected to the first end of the first switch tube, and the second end of the fourth resistor is connected to the control end of the first switch tube; a fifth resistor, the first end of the fifth resistor is connected to the control end of the first switch tube; a second switch tube, the first end of the second switch tube is connected to the second end of the fifth resistor, the second end of the second switch tube is grounded, and the control end of the second switch tube is connected to the output end of the trigger; a sixth resistor, the first end of the sixth resistor is connected to the control end of the second switch tube, and the second end of the sixth resistor is connected to the second end of the second switch tube.

[0048] In this technical solution, by setting a trigger, the microcontroller unit does not need to output the same signal all the time to operate the charging switch tube and the discharging switch tube, which is beneficial to reducing the power consumption of the control circuit of the energy storage device.

[0049] At the same time, by setting up a voltage conversion circuit, the voltage output by the battery pack can be converted to obtain a voltage suitable for use by the microcontroller unit. At the same time, it can also power other components in the energy storage device to meet the power supply needs of different devices.

[0050] In the above technical solution, by setting the first switch tube and the second switch tube, the conduction and cutoff of the first switch tube can be controlled by utilizing the conduction and cutoff of the second switch tube. In this process, the requirements for the driving capability of the micro control unit can be reduced, thereby reducing the manufacturing cost of the control circuit of the energy storage device.

[0051] In the above technical solution, the fifth resistor is provided so as to limit the current of the switch circuit when it is working, thereby preventing the first switch tube from being damaged due to overcurrent. Obviously, the reliability of the control circuit of the energy storage device can be improved.

[0052] In some technical solutions, optionally, the first switch tube is a MOS tube (Positive Channel Metal Oxide Semiconductor, PMOS) with an n-type substrate and a p-channel, which transports current by the flow of holes.

[0053] In some technical schemes, optionally, the control circuit of the energy storage device also includes: a second diode, connected in series between the switching circuit and the second end of the self-resetting switch, the anode of the second diode is connected to the second end of the self-resetting switch, and the cathode of the second diode is connected to the control end of the second switching tube; and / or a third diode, connected in series between the control end of the second switching tube and the output end of the trigger, the anode of the third diode is connected to the output end of the trigger, and the cathode of the third diode is connected to the control end of the second switching tube.

[0054] In this technical solution, a second diode is provided so as to utilize the second diode to limit the direction of action of the voltage outputted from the second end of the self-resetting switch and the output end of the trigger, that is, it can only act on the control end of the second switch tube. During this process, the voltage outputted from the second end of the self-resetting switch cannot act on the output end of the trigger. Meanwhile, the voltage outputted from the output end of the trigger cannot act on the second end of the self-resetting switch. While ensuring accurate control of the second switch tube, the disorder of the control circuit of the energy storage device caused by mutual interference between the two is avoided, thereby improving the reliability of the control circuit of the energy storage device.

[0055] According to a second aspect of the present invention, the present invention provides an energy storage device, comprising: a battery pack; and a control circuit of the energy storage device as described in any one of the first aspects.

[0056] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0058] Figure 1 A schematic diagram of an energy storage device in the related art is shown;

[0059] Figure 2 One of the schematic diagrams of a control circuit of an energy storage device in an embodiment of the present invention is shown;

[0060] Figure 3 A schematic diagram of the flow of power-on control logic in an embodiment of the present invention is shown;

[0061] Figure 4 A schematic diagram of the flow of power-off control logic in an embodiment of the present invention is shown;

[0062] Figure 5 A schematic flow chart of the black start control logic in an embodiment of the present invention is shown;

[0063] Figure 6A second schematic diagram of a control circuit of an energy storage device in an embodiment of the present invention is shown.

[0064] in, Figure 1 The corresponding relationship between the reference numerals and the component names is as follows:

[0065] 200' energy storage device, 202' battery pack, 100' control circuit of energy storage device, 102' analog front-end chip, 104' micro control unit, K' switch device, CHG' charging switch tube, DSG' discharging switch tube, PDSG' pre-charging switch tube, RS' pre-charging resistor, D1' first diode, 106' voltage conversion circuit.

[0066] in, Figure 2 and Figure 6 The corresponding relationship between the reference numerals and the component names is as follows:

[0067] 100 control circuit of energy storage device, 102 voltage divider circuit, 104 switch circuit, 106 micro control unit, 108 analog front end chip, K self-reset switch, 200 energy storage device, 202 battery pack, CHG charging switch tube, DSG discharging switch tube, PDSG pre-charging switch tube, RS pre-charging resistor, D1 first diode, LED light emitting diode, R1 first resistor, R2 second resistor, R3 third resistor, R4 fourth resistor, R5 fifth resistor, R6 sixth resistor, PMOS1 first switch tube, NMOS1 second switch tube, D2 second diode, D3 third diode, 110 trigger, 112 voltage conversion circuit. DETAILED DESCRIPTION

[0068] In order to more clearly understand the above aspects, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0069] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0070] In one embodiment of the present application, Figure 2As shown, a control circuit 100 of an energy storage device is provided, the energy storage device 200 includes a battery pack 202, and the control circuit 100 of the energy storage device includes: a self-reset switch K, a first end of the self-reset switch K is connected to the positive electrode of the battery pack 202; a voltage divider circuit 102, a first end of the voltage divider circuit 102 is connected to the second end of the self-reset switch K, and the second end of the voltage divider circuit 102 is grounded; a switch circuit 104, a first end of the switch circuit 104 is connected to the positive electrode of the battery pack 202, a second end of the switch circuit 104 is grounded, and the switch circuit 104 is connected to the second end of the self-reset switch K; a micro control unit 106, a power supply end of the micro control unit 106 is connected to the third end of the switch circuit 104, and a switch control end of the micro control unit 106 is connected to the switch circuit 104; wherein, when the self-reset switch K is turned on, the first end of the self-reset switch K is connected to the second end of the self-reset switch K, the switch circuit 104 is turned on, and the micro control unit 106 is used to control the switch circuit 104 to be turned on or off according to the level signal on the voltage divider circuit 102.

[0071] The present invention provides a control circuit 100 for an energy storage device, which includes a self-reset switch K, a voltage divider circuit 102, a switch circuit 104, and a micro control unit 106. When the self-reset switch K is turned on, the switch circuit 104 can be controlled to be turned on, thereby supplying power to the micro control unit 106, and the micro control unit 106 can control the switch circuit 104 to be turned on or off according to the level signal on the voltage divider circuit 102 after power-on.

[0072] Obviously, in the above embodiment, the self-reset switch K can be used to control the switch circuit 104 to be turned on, so as to temporarily supply power to the micro control unit 106, and the micro control unit 106 can know the user's intention to operate the self-reset switch K through the level signal on the voltage divider circuit 102, and control the switch circuit 104 to be turned on or off according to the detected user's intention to operate the self-reset switch K. In this process, the self-reset switch K only plays the role of receiving the user's operation, and it can be disconnected after the user's operation, so that when the switch circuit 104 is turned on, it is not necessary to keep the self-reset switch K turned on all the time, thereby reducing the risk of failure of the self-reset switch K, and improving the reliability of the control circuit 100 of the energy storage device without affecting the operation of the control circuit 100 of the energy storage device.

[0073] In some embodiments, optionally, the self-resetting switch K is a spring reset button.

[0074] In some embodiments, optionally, the micro control unit 106 is specifically used to: determine, based on the level signal on the voltage divider circuit 102, that the duration for which the level on the voltage divider circuit 102 is greater than or equal to the first level is greater than or equal to the first duration, and determine that a power-on signal is detected; when the power-on signal is detected, the micro control unit 106 outputs a second level, and the switch circuit 104 is in a conductive state in response to the second level; and based on the level on the voltage divider circuit 102 decreasing from the first level to the third level, the micro control unit 106 continuously outputs the second level; wherein the second level is greater than the third level.

[0075] In this embodiment, when the user presses the self-reset switch K, the self-reset switch K is turned on, and at this time, the first end of the self-reset switch K is connected to the second end of the self-reset switch K, and when the self-reset switch K is turned on, the switch circuit 104 is turned on. Since the first end of the switch circuit 104 is connected to the positive electrode of the battery pack 202, and the third end of the switch circuit 104 is connected to the power supply end of the micro control unit 106, when the switch circuit 104 is turned on, the positive electrode of the battery pack 202 is connected to the power supply end of the micro control unit 106, and at this time, the micro control unit 106 is powered on and detects the level signal on the voltage divider circuit 102.

[0076] If the level signal on the voltage divider circuit 102 determines that the level on the voltage divider circuit 102 is greater than or equal to the first level and the duration is greater than or equal to the first duration, it is determined that the user's operation intention is to power on the micro control unit 106. At this time, it is determined that the power-on signal is detected. When the power-on signal is detected, the second level is output to control the switch circuit 104 to be turned on. When the micro control unit 106 detects that the level on the voltage divider circuit 102 drops from the first level to the third level, it is determined that the user resets the self-reset switch K. At this time, the second level is continuously output so that the micro control unit 106 can remain powered on and work.

[0077] In some embodiments, optionally, the first duration can be determined according to actual usage needs, which will not be described in detail here.

[0078] Exemplarily, the first duration is 2 seconds.

[0079] In some embodiments, optionally, the micro control unit 106 is specifically used to: determine, based on the level signal on the voltage divider circuit 102, that the level on the voltage divider circuit 102 increases from the third level to the first level, and remains greater than or equal to the first level for a duration greater than or equal to a second duration, and determine that a power-off signal is detected; when the micro control unit 106 detects the power-off signal, the micro control unit 106 stops outputting the second level, and outputs a fourth level, and the switch circuit 104 is in an off state in response to the fourth level, wherein the second level is greater than the fourth level, and the second duration is greater than the first duration.

[0080] In this embodiment, after the microcontroller unit 106 is powered on, the level on the voltage divider circuit 102 will drop to the third level. If the user operates the self-reset switch K again, the self-reset switch K will be turned on again. Obviously, the level on the voltage divider circuit 102 will increase.

[0081] Based on this, if the level signal on the voltage divider circuit 102 determines that the level on the voltage divider circuit 102 increases from the third level to the first level, and remains greater than or equal to the first level for a duration greater than or equal to the second duration, it is determined that the user's operation intention is to power off the micro control unit 106. At this time, it is determined that the power-off signal is detected. At this time, the micro control unit 106 stops outputting the second level and outputs the fourth level so that the switch circuit 104 can be turned off in response to the fourth level.

[0082] During this process, the self-reset switch K can be automatically reset after the user's operation. Therefore, after power is off, the self-reset switch K can remain in the disconnected state, and there is no need to keep the self-reset switch K turned on all the time. Therefore, the risk of failure of the self-reset switch K is reduced, and the reliability of the control circuit 100 of the energy storage device is improved without affecting the operation of the control circuit 100 of the energy storage device.

[0083] In some embodiments, the second duration can be determined based on actual usage needs, which will not be further described here.

[0084] Exemplarily, the second duration is 6 seconds.

[0085] In some embodiments, optionally, the control circuit 100 of the energy storage device further includes a charging switch tube CHG and a discharging switch tube DSG, wherein the first end of the charging switch tube CHG is connected to the positive electrode of the battery pack 202, the first end of the discharging switch tube DSG is connected to the second end of the charging switch tube CHG, and the second end of the discharging switch tube DSG is connected to the positive electrode output end, and the microcontroller unit 106 is further used for: when the switch circuit 104 is turned on, determining based on the level signal on the voltage divider circuit 102 that the level on the voltage divider circuit 102 is greater than or equal to the first level and the duration is greater than or equal to the third duration and less than the second duration, and determining that a start signal is detected; when the microcontroller unit 106 detects the start signal, the microcontroller unit 106 drives the charging switch tube CHG and the discharging switch tube DSG to turn on; wherein the third duration is greater than the first duration.

[0086] In this embodiment, the charging switch tube CHG and the discharging switch tube DSG will not be turned on at the moment the micro control unit 106 is powered on, thereby reducing the risk of short circuit and electric shock in the control circuit 100 of the energy storage device, thereby improving the reliability of the control circuit 100 of the energy storage device.

[0087] Specifically, in the relevant embodiment, the charging switch tube CHG and the discharging switch tube DSG will be automatically turned on after the micro control unit 106 completes the power-on self-test, and then output voltage to the outside.

[0088] In an embodiment of the present invention, when the switch circuit 104 is turned on, the micro control unit 106 can draw power from the battery pack 202 and then power on for self-test. If the user operates the self-reset switch K again, a level greater than or equal to the first level will be formed on the voltage divider circuit 102. If the duration of the level is greater than or equal to the third duration, it is determined that the user's operation intention is to output power. At this time, it is determined that the start signal is detected, so that the micro control unit 106 responds to the start signal to control the charging switch tube CHG and the discharging switch tube DSG to be turned on, thereby achieving external output voltage.

[0089] During this process, the user can control whether to output power to the outside by operating the self-resetting switch K, thereby reducing the risk of short circuit and electric shock and improving the reliability of the control circuit 100 of the energy storage device.

[0090] In some embodiments, optionally, the third duration can be determined according to actual usage needs, which will not be described in detail here.

[0091] Exemplarily, the third duration is greater than or equal to 3 seconds and less than 6 seconds.

[0092] Exemplarily, the third duration is 3 seconds.

[0093] In some embodiments, optionally, the control circuit 100 of the energy storage device further includes: a pre-charging switch tube PDSG, wherein the first end of the pre-charging switch tube PDSG is connected to the second end of the charging switch tube CHG, and the control end of the pre-charging switch tube PDSG is connected to the first driving end of the micro control unit 106; a pre-charging resistor RS, wherein the first end of the pre-charging resistor RS is connected to the second end of the pre-charging switch tube PDSG; a first diode D1, wherein the anode of the first diode D1 is connected to the second end of the pre-charging resistor RS, and the cathode of the first diode D1 is connected to the positive output end; wherein the micro control unit 106 is used to: drive the pre-charging switch tube PDSG to turn on when a start signal is detected.

[0094] In this embodiment, the pre-charging switch tube PDSG, the pre-charging resistor RS and the first diode D1 constitute a pre-charging circuit. When a start signal is detected, the pre-charging switch tube PDSG is controlled to be turned on, so that the control circuit 100 of the energy storage device outputs power supply.

[0095] In this process, the pre-charging circuit can be used for pre-charging, which can extend the service life of the device to be charged connected to the energy storage device 200, thereby reducing the replacement frequency of the battery in the device to be charged and increasing the service life of the device to be charged.

[0096] In some embodiments, optionally, the pre-charge switch tube PDSG is an N-type metal oxide semiconductor (Negative channel-Metal-Oxide-Semiconductor, NMOS).

[0097] In some embodiments, optionally, the control circuit 100 of the energy storage device further includes: an analog front-end chip 108, wherein the input end of the analog front-end chip 108 is connected to the second driving end of the micro-control unit 106, and the output end of the analog front-end chip 108 is connected to the control end of the charging switch tube CHG and the control end of the discharging switch tube DSG; wherein the micro-control unit 106 drives the charging switch tube CHG and the discharging switch tube DSG to be turned on through the analog front-end chip 108.

[0098] In this embodiment, the analog front-end chip 108 is provided so as to utilize the analog front-end chip 108 to realize indirect control of the charging switch tube CHG and the discharging switch tube DSG.

[0099] In the above embodiment, the analog front end chip 108 (Analog Front End, AFE) can be used to measure parameters such as the voltage and temperature of the battery pack 202, estimate the remaining capacity of the battery pack 202, control the charging and discharging process, issue abnormal alarms and protection, such as overcharging, over-discharging, over-temperature, etc., and perform balancing control to ensure that the status of each single cell in the battery pack 202 is uniform.

[0100] In this process, the control of the charging switch tube CHG and the discharging switch tube DSG can be ensured while improving the reliability of the energy storage device 200.

[0101] In some embodiments, optionally, the control circuit 100 of the energy storage device also includes: a light emitting diode LED, which is connected to the micro control unit 106; the micro control unit 106 is also used to: control the light emitting diode LED to be always on based on detecting a power-on signal; control the light emitting diode LED to be off based on detecting a power-off signal; and control the light emitting diode LED to flash based on detecting a start signal.

[0102] In this embodiment, the light emitting diode LED can present different display effects according to different signals detected by the micro control unit 106 .

[0103] During this process, the user can determine the state of the control circuit 100 of the energy storage device based on whether the light-emitting diode LED is always on, flashing or off. The operator can use the visual information to identify the correctness of the operation and reduce the possibility of misoperation and operation failure.

[0104] In some embodiments, optionally, the voltage divider circuit 102 includes: a first resistor R1, a first end of the first resistor R1 is connected to the second end of the self-reset switch K; a second resistor R2, a first end of the second resistor R2 is connected to the second end of the first resistor R1, and the second end of the second resistor R2 is grounded; wherein the level signal on the voltage divider circuit 102 is the level signal at the first end of the second resistor R2.

[0105] In this embodiment, after the first resistor R1 and the second resistor R2 are connected in series, they are respectively connected to the second end of the self-reset switch K and grounded, so that when the self-reset switch K is turned on, the positive electrode of the battery pack 202 can be grounded through the first resistor R1 and the second resistor R2, and then a voltage drop is formed between the first resistor R1 and the second resistor R2. The micro control unit 106 can know the opening and closing state of the self-reset switch K according to the level signal at the first end of the second resistor R2, thereby estimating the user's motivation and realizing accurate identification of power-on, power-off and startup.

[0106] During this process, the self-resetting switch K is in the on state only when operated by the user, so it does not need to be kept on all the time, thereby extending the service life of the self-resetting switch K.

[0107] In some embodiments, optionally, the control circuit 100 of the energy storage device further includes: a third resistor R3 , which is connected in series between the first end of the self-resetting switch K and the positive electrode of the battery pack 202 .

[0108] In this embodiment, the third resistor R3 is set so that the third resistor R3 can be used to increase the resistance value of the loop in which the voltage divider circuit 102 is located. Obviously, when the loop resistance is increased, the current in the loop will be reduced, thereby reducing the current value when the self-reset switch K is working, thereby extending the service life of the self-reset switch K.

[0109] In some embodiments, optionally, the control circuit 100 of the energy storage device includes a trigger 110 and a voltage conversion circuit 112, the switch control end is connected to the input end of the trigger 110, and the switch circuit 104 includes: a first switch tube PMOS1, a first end of the first switch tube PMOS1 is connected to the positive electrode of the battery pack 202, a second end of the first switch tube PMOS1 is connected to the input end of the voltage conversion circuit 112, and an output end of the voltage conversion circuit is connected to the power supply end of the micro control unit 106; a fourth resistor R4, a first end of the fourth resistor R4 is connected to the first end of the first switch tube PMOS1, and the fourth The second end of the resistor R4 is connected to the control end of the first switch tube PMOS1; the fifth resistor R5, the first end of the fifth resistor R5 is connected to the control end of the first switch tube PMOS1; the second switch tube NMOS1, the first end of the second switch tube NMOS1 is connected to the second end of the fifth resistor R5, the second end of the second switch tube NMOS1 is grounded, and the control end of the second switch tube NMOS1 is connected to the output end of the trigger; the sixth resistor R6, the first end of the sixth resistor R6 is connected to the control end of the second switch tube NMOS1, and the second end of the sixth resistor R6 is connected to the second end of the second switch tube NMOS1.

[0110] In this embodiment, by setting the trigger 110, the micro control unit 106 does not need to always output the same signal to operate the charging switch tube CHG and the discharging switch tube DSG, which is beneficial to reducing the power consumption of the control circuit 100 of the energy storage device.

[0111] At the same time, by setting up a voltage conversion circuit 112, the voltage output by the battery pack 202 can be converted to obtain a voltage suitable for use by the micro control unit 106. At the same time, it can also power other components in the energy storage device 200 to meet the power supply needs of different devices.

[0112] In the above embodiment, the first switch tube PMOS1 and the second switch tube NMOS1 are provided so that the conduction and cutoff of the first switch tube PMOS1 can be controlled by utilizing the conduction and cutoff of the second switch tube NMOS1. In this process, the requirement on the driving capability of the micro control unit 106 can be reduced, thereby reducing the manufacturing cost of the control circuit 100 of the energy storage device.

[0113] In the above embodiment, the fifth resistor R5 is provided so as to limit the current of the switch circuit 104 when it is working, thereby preventing the first switch tube PMOS1 from being damaged due to overcurrent. Obviously, the reliability of the control circuit 100 of the energy storage device can be improved.

[0114] In some embodiments, optionally, the first switch tube PMOS1 is a MOS tube (Positive Channel Metal Oxide Semiconductor, PMOS) that has an n-type substrate and a p-channel and transports current by the flow of holes.

[0115] In some embodiments, optionally, the control circuit 100 of the energy storage device also includes: a second diode D2, which is connected in series between the switch circuit 104 and the second end of the self-reset switch K, the anode of the second diode D2 is connected to the second end of the self-reset switch K, and the cathode of the second diode D2 is connected to the control end of the second switch tube NMOS1; and / or a third diode D3, which is connected in series between the control end of the second switch tube NMOS1 and the output end of the trigger, the anode of the third diode D3 is connected to the output end of the trigger, and the cathode of the third diode D3 is connected to the control end of the second switch tube NMOS1.

[0116] In this embodiment, the second diode D2 is provided so as to limit the direction of action of the voltage outputted from the second end of the self-resetting switch K and the output end of the trigger by the second diode D2, that is, the voltage can only act on the control end of the second switch tube NMOS1. In this process, the voltage outputted from the second end of the self-resetting switch K cannot act on the output end of the trigger, and the voltage outputted from the output end of the trigger cannot act on the second end of the self-resetting switch K. While ensuring the accurate control of the second switch tube NMOS1, the disorder of the control circuit 100 of the energy storage device caused by the mutual interference between the two is avoided, thereby improving the reliability of the control circuit 100 of the energy storage device.

[0117] Specifically, the control circuit 100 of the energy storage device is provided in a battery management system (BMS), and the trigger 110 is a D trigger, such as Figure 3 and Figure 6 As shown, the control method for the control circuit of the energy storage device includes:

[0118] Step 302, the manual button is pressed (closed), the MCU returns the voltage to a high level state, and the button voltage divider outputs VD2 at a high level.

[0119] Among them, MCU is also the micro control unit in this application, button K is also the self-reset switch K in this application, and MCU return voltage is Figure 2 Middle A position.

[0120] Step 304 , VD2 is set to a high level, that is, the G to S of NMOS1 is set to a high level, the DS pole of NMOS1 is turned on, and then the DS pole of PMOS1 is turned on.

[0121] Among them, H represents a high level, and L represents a low level.

[0122] Step 306 , the positive channel input of the BUCK1 power module output is conducted through the D-pole to S-pole of the PMOS1 .

[0123] Step 308, BAT+ outputs LV3 to supply power to the BMS system through buck1, buck2, and the LDO step-down module.

[0124] Among them, buck1, buck2, and LDO step-down module are modules in the voltage conversion circuit 112, namely, low dropout linear regulator (Low Dropout Regulator, LDO).

[0125] Step 310 , the MCU control unit, the AFE control unit and the peripherals are powered on.

[0126] Among them, the MCU control unit is also the micro control unit in this application, and the AFE control unit is also the analog front-end chip in this application.

[0127] Step 312, after the MCU control unit is initialized and powered on, it steps back on the MCU voltage for 2S to set it to a high level state, and then drives the D flip-flop to output a high level VD1.

[0128] Step 314: The D flip-flop outputs a high level VD1 to drive the DS pole of NMOS1 to close.

[0129] Step 316, the button closing voltage divider VD2 and the D flip-flop output high level VD1 compete to drive NMOS1 to close.

[0130] Step 318: After the MCU drives the D flip-flop to output a high level for 200ms, the LED indicator light is driven to be always on.

[0131] Step 320, after recognizing that the LED indicator light is always on, the hand leaves button K, button K is disconnected, the MCU returns to a low voltage, and VD2 is set to a low level.

[0132] Step 322, the MCU continues to output a high level VD1 to the D flip-flop, and the BMS system is powered on and works stably.

[0133] Specifically, in the case where the self-reset switch is a spring reset button, first manually press the spring reset button K to close it, then the MCU returns to the high level state, the button voltage divider outputs VD2 high level, that is, the G of NMOS1 is set to a high level to S, the DS pole of NMOS is turned on, and then the DS pole of PMOS1 is turned on, the BUCK1 power module outputs the positive channel input through the D pole to S pole of PMOS1, BAT+ outputs LV3 to the BMS system through buck1, buck2, and the LDO step-down module, the MCU control unit AFE control unit and the peripherals are powered on, and the MCU control unit is initialized and powered on After that, the MCU is pressed back for 2 seconds and the pressure is set to a high level state, and then the D trigger is driven to output a high level VD1. The button is closed and the voltage divider VD2 and the D trigger output high level VD1 compete to drive NMOS1 to close. The D trigger outputs a high level to the DS pole of NMOS1. The conduction time is about 50ms. After the MCU drives the D trigger to output a high level for 200ms, the LED indicator light is driven to be always on. After recognizing that the LED indicator light is always on, the hand leaves button K, button K is disconnected, the MCU pressure voltage is set to a low level, VD2 is set to a low level, and the MCU continues to maintain the output high level VD1 through the D trigger, and the BMS secondary side system is powered on and works stably.

[0134] Exemplarily, after manually pressing the spring reset button K (closed), the MCU reset voltage is set to a high level state of 3.3V, and the button voltage divider outputs VD2 high level 5V, that is, the G of NMOS1 is set to a high level of 5V to S, the DS pole of NMOS is turned on, and then the DS pole of PMOS1 is turned on, and the BUCK1 power module outputs the positive channel (30V~64V) input through the D pole to S pole of PMOS1, BAT+ passes through buck1 (output 12V), buck2 outputs 5V, and the LDO step-down module outputs LV3 3.3V to power the BMS system, the MCU control unit AFE control unit and the peripherals are powered on, and the MCU control unit is initialized and powered on for 2S to reset the MCU reset voltage to a high level of 3.3V, and then drives the D flip-flop to output a high level VD1 5V, and the button is closed to divide the voltage VD2 5V and the D flip-flop outputs a high level VD1 5V competition drives NMOS1 to close, and the D flip-flop outputs a high level of 5V. The conduction time to the DS pole of NMOS1 is about 50ms. After the MCU drives the D flip-flop to output a high level for 200ms, the driver outputs 3.3V to the LED indicator light. After the person recognizes that the LED indicator light is always on, the hand leaves the button K, and the button K is disconnected. The MCU returns to the low voltage of 0V, and VD2 is set to a low level of 0V. The MCU continues to maintain the output high level VD1 5V through the D flip-flop, and the BMS secondary side system is stably powered on and works.

[0135] Specifically, Figure 4 and Figure 6As shown, the control method for the control circuit of the energy storage device includes:

[0136] Step 402, the BMS system operates normally after being powered on, and the MCU steps back on the voltage VD2 to a low level state.

[0137] Step 404, manually close the button K, the MCU continues to step back for 6S to set the MCU step back voltage VD2 to a high level, and then drives the D trigger to output a low level VD1.

[0138] Step 406: The D flip-flop outputs a low level VD1.

[0139] Step 408, after the K button is closed, BAT+ divides the voltage VD2 to drive NMOS1 and PMOS1 to close, and BAT+ is powered through the S-pole to D-pole loop of PMOS1.

[0140] Step 410: After the MCU drives the D flip-flop to output a low level for 200ms, the LED indicator light is driven to turn off.

[0141] Step 412, after recognizing that the LED indicator light is off, the hand leaves the button K, the button K is disconnected, and the button dividing voltage VD2 is set to a low level.

[0142] Step 414 , VD2 is set low, the DS terminal of NMOS1 is disconnected and the SD terminal of PMOS1 is disconnected.

[0143] Step 416, the BAT+ power supply input circuit is disconnected, the BMS system is powered off and stops working.

[0144] Specifically, the BMS system runs normally after power-on, the MCU steps back to set the voltage VD2 to a low level, the button K is manually closed, the MCU steps back for 5S, the MCU steps back to set the voltage VD2 to a high level, and then drives the D flip-flop to output a low level VD1, the D flip-flop outputs a low level VD1, BAT+ drives NMOS1 and PMOS1 to close through the voltage divider VD2 after the K button is closed, BAT+ is powered through the PMOS1 S pole to D pole loop, and the D flip-flop outputs a low level to the DS pole of NMOS1 for about 50ms. After the MCU drives the D flip-flop to output a low level for 200ms, the LED indicator light is driven to go out, and after recognizing that the LED indicator light is off, the hand leaves the button K, the button K is disconnected, the button voltage divider VD2 is set to a low level, VD2 is set low, the DS pole of NMOS1 is disconnected, and then the SD pole of PMOS1 is disconnected, the BAT+ power supply input is disconnected, the BMS system is powered off, and stops working.

[0145] Exemplarily, the BMS system operates normally after power-on, the MCU steps back on the voltage VD2 to set it to a low level of 0V, the button K is manually closed, the MCU steps back on the voltage VD2 for 5S to set it to a high level of 3.3V, and then drives the D flip-flop to output a low level VD1 0V, the D flip-flop outputs a low level VD1NMOS1 DS is disconnected, NMOS1 is disconnected and then the PMOS1 SD pole is disconnected, and BAT+ (30V~64V) is powered through the K button loop. The D flip-flop outputs a low level to the DS pole of NMOS1 for about 50ms. After the MCU drives the D flip-flop to output a low level of OV for 200ms, it drives the output of 0V to the LED, and the LED indicator light goes out. After recognizing that the LED indicator light goes out, the hand leaves the button K, the button K is disconnected, the BAT+ power supply input is disconnected, the BMS system completes power-off, and stops working.

[0146] Specifically, Figure 5 and Figure 6 As shown, the control method for the control circuit of the energy storage device includes:

[0147] Step 502: The BMS system operates normally after being powered on.

[0148] Step 504, the manual button presses the K button (closed), and the MCU steps back on the voltage VD2 to a high level state.

[0149] Step 506, the MCU control unit continuously steps on the MCU back to high voltage for 3S to drive the LED indicator to flash.

[0150] Step 508, after recognizing that the LED indicator light is flashing, the hand immediately leaves button K, button K is disconnected, the MCU returns to a low voltage, and VD2 is set to a low level.

[0151] Step 510, the MCU control unit continues to step back to set the VD2 level high for a time of 3S≤t<6S, then the MCU's PDSG and the AFE's CHG and DSG output high levels in sequence to drive the main loop power MOS to close and conduct.

[0152] Step 512: The BMS system power main loop closing action is completed.

[0153] Specifically, after the low-voltage BMS system is powered on and works normally, the spring reset button K (closed) is manually pressed, and the MCU's return voltage VD2 is set to a high level state. The MCU control unit continues to return the MCU for 3S to set the MCU's return voltage high, and then drives the MCU's PDSG and AFE's CHG and DSG to output high levels in sequence to drive the main circuit power MOS to close and turn on. The MCU synchronously drives the LED indicator to flash. After recognizing that the LED indicator is flashing, the hand leaves button K, button K is disconnected, the MCU's return voltage is set to a low level, and VD2 is set to a low level.

[0154] Exemplarily, after the low-voltage BMS system is powered on and working normally, the spring reset button K (closed) is manually pressed, and the MCU's return voltage VD2 is set to a high level of 3.3V. The MCU control unit continues to return the MCU for 3S, and the MCU's return voltage is set to 3.3V. Then it drives the MCU's PDSG and the AFE's CHG and DSG to output high levels in sequence to drive the main circuit power MOS to close and turn on. The MCU synchronously drives the output PWM square wave (3.3V / 0V), and the LED indicator flashes. After recognizing that the LED indicator flashes, the hand leaves button K, button K is disconnected, the MCU's return voltage is set to 0V, and VD2 is set to a low level of 0V.

[0155] In this embodiment, a closed spring reset button is used to directly power on the auxiliary power system of the BMS system. When the BMS system is in power-on mode, the button is in a disconnected state. The button is not in the main power supply circuit and does not carry current for a long time, thereby meeting long-term reliability life requirements.

[0156] After the BMS system is powered on and working stably, a closed spring reset button is used. The MCU recognizes that the voltage is reset from low to high and then drives the power MOS to disconnect the power. This avoids frequent use of the power main circuit button to directly power off the system to generate electromagnetic radiation to the outside, interfere with surrounding equipment, and avoid problems caused by excessive voltage. It is harmless to the human body and electronic components.

[0157] The BMS system is powered on, the power main circuit is black-started, and the BMS system is powered off in the form of a closed spring one-button. After the BMS power-on logic is executed, the LED is always on, after the BMS power main circuit black-start is executed, the LED light flashes, and after the BMS power-off operation logic is executed, the LED light goes out, which increases the user's visibility and experience of the one-button BMS system power-on and power circuit black-start function operations.

[0158] After the BMS system is powered on, a button black start is added to close the power main circuit and directly output voltage to the outside, greatly reducing safety risks such as short circuit or electric shock.

[0159] In one embodiment, the present invention provides an energy storage device, comprising: a battery pack; and a control circuit of the energy storage device as described in any one of the first aspects.

[0160] The term "first" or "second" in the specification and claims of the present application may include one or more of the features explicitly or implicitly. In the textual description of the present invention, unless otherwise specified, "plurality" means two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means that the objects connected before and after are in an "or" relationship.

[0161] In the text description of the present invention, it is understood that, except for explicit provisions and limitations, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be fixed connection, detachable connection, or integral connection; it can be mechanical structure connection or electrical connection; it can be direct connection between the two, or indirect connection between the two through an intermediate medium, or it can be internal communication between two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0162] In the claims, specification and drawings of the present invention, the description of the terms "one embodiment", "some embodiments", "specific embodiments" and the like 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 invention. In the claims, specification and drawings of the present invention, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0163] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A control circuit for an energy storage device, characterized in that: The energy storage device includes a battery pack, and the control circuit of the energy storage device includes: A self-resetting switch, wherein a first end of the self-resetting switch is connected to the positive electrode of the battery pack; A voltage divider circuit, wherein a first end of the voltage divider circuit is connected to a second end of the self-resetting switch, and a second end of the voltage divider circuit is grounded; a switch circuit, wherein a first end of the switch circuit is connected to the positive electrode of the battery pack, a second end of the switch circuit is grounded, and the switch circuit is connected to the second end of the self-reset switch; A micro control unit, wherein a power supply terminal of the micro control unit is connected to the third terminal of the switch circuit, and a switch control terminal of the micro control unit is connected to the switch circuit; Among them, when the self-resetting switch is turned on, the first end of the self-resetting switch is connected to the second end of the self-resetting switch, the switching circuit is turned on, and the micro control unit is used to control the switching circuit to be turned on or off according to the level signal on the voltage divider circuit.

2. The control circuit of the energy storage device according to claim 1, characterized in that: The micro control unit is specifically used for: Determine based on the level signal on the voltage divider circuit that the level on the voltage divider circuit is greater than or equal to the first level for a duration greater than or equal to the first duration, and determine that a power-on signal is detected; The micro control unit outputs a second level when detecting the power-on signal, and the switch circuit is in a conducting state in response to the second level; as well as Based on the voltage level on the voltage divider circuit decreasing from the first level to a third level, the micro control unit continuously outputs the second level; The second level is greater than the third level.

3. The control circuit of the energy storage device according to claim 2, characterized in that: The micro control unit is specifically used for: Determining based on the level signal on the voltage divider circuit that the level on the voltage divider circuit increases from the third level to the first level, and remains greater than or equal to the first level for a duration greater than or equal to a second duration, determining that a power-off signal is detected; When the micro control unit detects the power-off signal, the micro control unit stops outputting the second level and outputs a fourth level, and the switch circuit is in an off state in response to the fourth level; The second level is greater than the fourth level, and the second duration is greater than the first duration.

4. The control circuit of the energy storage device according to claim 3, characterized in that: The control circuit of the energy storage device further includes a charging switch tube and a discharging switch tube, wherein the first end of the charging switch tube is connected to the positive electrode of the battery pack, the first end of the discharging switch tube is connected to the second end of the charging switch tube, and the second end of the discharging switch tube is connected to the positive electrode output end, and the micro control unit is further used for: When the switch circuit is turned on, determining based on the level signal on the voltage divider circuit that the level on the voltage divider circuit is greater than or equal to the first level for a duration that is greater than or equal to a third duration and less than the second duration, and determining that a start signal is detected; When the micro control unit detects the start signal, the micro control unit drives the charging switch tube and the discharging switch tube to turn on; Among them, the third duration is greater than the first duration.

5. The control circuit of the energy storage device according to claim 4, characterized in that: The control circuit of the energy storage device also includes: A pre-charging switch tube, wherein a first end of the pre-charging switch tube is connected to a second end of the charging switch tube, and a control end of the pre-charging switch tube is connected to a first driving end of the micro control unit; A pre-charging resistor, a first end of which is connected to a second end of the pre-charging switch tube; a first diode, wherein an anode of the first diode is connected to the second end of the pre-charging resistor, and a cathode of the first diode is connected to the positive output end; Wherein, the micro control unit is used to drive the pre-charging switch tube to turn on when the start signal is detected.

6. The control circuit of the energy storage device according to claim 4, characterized in that: The control circuit of the energy storage device also includes: An analog front-end chip, wherein the input end of the analog front-end chip is connected to the second driving end of the micro control unit, and the output end of the analog front-end chip is connected to the control end of the charging switch tube and the control end of the discharging switch tube; Wherein, the micro control unit drives the charging switch tube and the discharging switch tube to be turned on through the analog front-end chip.

7. The control circuit of the energy storage device according to claim 4, characterized in that: The control circuit of the energy storage device also includes: A light emitting diode, wherein the light emitting diode is connected to the micro control unit; The micro control unit is also used for: Based on detecting the power-on signal, controlling the light emitting diode to be always on; Based on detecting the power-off signal, controlling the light emitting diode to turn off; Based on detecting the start signal, the light emitting diode is controlled to flash.

8. The control circuit of the energy storage device according to any one of claims 1 to 7, characterized in that: The voltage divider circuit comprises: a first resistor, wherein a first end of the first resistor is connected to a second end of the self-resetting switch; a second resistor, a first end of the second resistor being connected to a second end of the first resistor, and a second end of the second resistor being grounded; The level signal on the voltage divider circuit is a level signal at the first end of the second resistor.

9. The control circuit of the energy storage device according to claim 8, characterized in that: The control circuit of the energy storage device also includes: A third resistor is connected in series between the first end of the self-resetting switch and the positive electrode of the battery pack.

10. The control circuit of the energy storage device according to any one of claims 1 to 7, characterized in that: The control circuit of the energy storage device includes a trigger and a voltage conversion circuit, the switch control terminal is connected to the input terminal of the trigger, and the switch circuit includes: A first switch tube, wherein a first end of the first switch tube is connected to the positive electrode of the battery pack, a second end of the first switch tube is connected to the input end of the voltage conversion circuit, and an output end of the voltage conversion circuit is connected to the power supply end of the micro control unit; a fourth resistor, wherein a first end of the fourth resistor is connected to the first end of the first switch tube, and a second end of the fourth resistor is connected to the control end of the first switch tube; a fifth resistor, a first end of the fifth resistor being connected to the control end of the first switch tube; a second switch tube, wherein a first end of the second switch tube is connected to a second end of the fifth resistor, a second end of the second switch tube is grounded, and a control end of the second switch tube is connected to an output end of the trigger; A sixth resistor, wherein a first end of the sixth resistor is connected to the control end of the second switch tube, and a second end of the sixth resistor is connected to the second end of the second switch tube.

11. The control circuit of the energy storage device according to claim 10, characterized in that: The control circuit of the energy storage device also includes: a second diode connected in series between the switch circuit and the second end of the self-resetting switch, wherein the anode of the second diode is connected to the second end of the self-resetting switch, and the cathode of the second diode is connected to the control end of the second switch tube; and / or The third diode is connected in series between the control end of the second switch tube and the output end of the trigger, the anode of the third diode is connected to the output end of the trigger, and the cathode of the third diode is connected to the control end of the second switch tube.

12. An energy storage device, characterized in that: include: Battery pack; A control circuit for an energy storage device as claimed in any one of claims 1 to 11.

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