Electric energy discharge control device

Abstract

The invention discloses an electric energy discharge control device. The energy storage circuit is used for storing potential storage electric energy; the bleeder circuit is used for releasing the potential storage electric energy through a bleeder resistor and a bleeder transistor which are connected in series; the reference voltage setting circuit is used for outputting a reference voltage signal; the bleeder sampling feedback circuit is used for outputting a bleeder sampling feedback electric signal according to the bleeder sampling current of the bleeder resistor; the post-stage voltage feedback circuit is used for outputting a post-stage voltage feedback electric signal according to the potential storage voltage; and the conduction degree of the discharge transistor is controlled according to the post-stage voltage feedback electric signal, the reference voltage signal and the discharge current collection feedback electric signal. The conduction degree of the bleeder transistor is dynamically controlled according to the bleeder current collection feedback electric signal and the post-stage voltage feedback electric signal, so that the change of potential storage electric energy of the energy storage device is dynamically adapted, the bleeder power and the current of the bleeder circuit are stable and controllable, and a higher bleeder rate can be realized under the condition that the bleeder power and the current are kept unchanged.

Description

Technical Field

[0001] This application relates to the field of power supply circuit technology, specifically to an energy discharge control device. Background Technology

[0002] The purpose of adding a rapid energy discharge function to a power supply circuit is to quickly and safely release the residual energy in energy storage components (such as capacitors and inductors) when the system encounters a fault, emergency shutdown, or requires rapid reset. This prevents voltage buildup, ensures the safety of personnel (e.g., in the high-voltage system of an electric vehicle, in an emergency such as a collision, the voltage on the high-voltage bus must be reduced below the safe voltage within seconds to prevent the risk of electric shock) and equipment (e.g., when the load changes suddenly or the power is turned off, excess energy accumulated in the circuit, if not discharged in time, will cause a sudden voltage rise, which may damage delicate electronic components), or meet specific testing needs (e.g., in testing, pulse power, and other fields, the power supply needs to have rapid response and discharge capabilities to simulate real working conditions or prepare for the next operation). Rapid discharge technology is developing towards being more intelligent, more integrated, and more efficient. Summary of the Invention

[0003] The main technical problem solved by this invention is how to adapt to the dynamic changes in the stored energy of the energy storage device during the energy discharge process, so as to make the discharge power of the discharge circuit stable and controllable.

[0004] According to a first aspect, one embodiment provides a power discharge control device, comprising:

[0005] An energy storage circuit, including an energy storage device, wherein the energy storage device is used to store stored electrical energy;

[0006] The bleeder circuit includes a bleeder resistor R connected in series. s And a discharge transistor Q1, and connected in parallel with the energy storage device of the energy storage circuit, for use when the discharge transistor Q1 is turned on, through the discharge transistor Q1 and the discharge resistor R s Release the stored electrical energy from the energy storage device;

[0007] Reference voltage setting circuit, used to output a reference voltage signal with a preset voltage value;

[0008] The bleed current sampling feedback circuit is used to provide feedback to the current flowing through the bleed current resistor R when the bleed current transistor Q1 is turned on. s The discharge current is sampled, and a discharge current sampling feedback signal is output based on the obtained discharge sampling current. The voltage value of the discharge current sampling feedback signal is positively correlated with the current value of the discharge current.

[0009] The subsequent voltage feedback circuit is used to monitor the storage voltage of the energy storage device and output a subsequent voltage feedback electrical signal based on the storage voltage.

[0010] A discharge control circuit is connected to the control terminal of the discharge transistor Q1 and is used to control the conduction degree of the discharge transistor Q1 based on the subsequent voltage feedback signal, the reference voltage signal, and the discharge sampling feedback signal.

[0011] In one embodiment, the energy storage device is an energy storage capacitor C0; the energy storage circuit further includes a current sampling resistor R0; the current sampling resistor R0 is connected in series with the energy storage capacitor C0;

[0012] The power discharge control device also includes:

[0013] The post-stage current sampling feedback circuit is used to sample the post-stage current flowing through the sampling resistor R0, and output the post-stage current sampling feedback electrical signal based on the obtained post-stage sampled current.

[0014] The discharge control circuit is used to control the conduction degree of the discharge transistor Q1 based on the subsequent current sampling feedback signal, the subsequent voltage feedback signal, the reference voltage signal, and the discharge current sampling feedback signal.

[0015] In one embodiment, the subsequent voltage feedback circuit includes a voltage feedback acquisition unit and a fixed power and current setting unit;

[0016] The voltage feedback acquisition unit is used to sample the storage voltage of the energy storage device to obtain the subsequent voltage feedback electrical signal.

[0017] The fixed power and current setting unit is used to convert the voltage values ​​of the subsequent voltage feedback signal and the reference voltage signal according to a preset fixed power and feedback signal conversion formula, so as to obtain the discharge control voltage value of the discharge according to a preset fixed power, and output the discharge drive signal with the voltage of the discharge control voltage value, so as to control the conduction degree of the discharge transistor Q1 according to the voltage value of the discharge drive signal.

[0018] In one embodiment, the energy storage circuit further includes a downstream connection terminal, a upstream connection terminal, and a common connection terminal;

[0019] The current-collecting resistor R0 is connected in series with the energy storage capacitor C0. One end of the current-collecting resistor R0 is used as the downstream connection terminal, and the other end of the current-collecting resistor R0 is used as the common connection terminal. The connection terminal of the current-collecting resistor R0 and the energy storage capacitor C0 is used as the upstream connection terminal. The downstream connection terminal and the common connection terminal are used as the power supply connection terminals for storing energy in the energy storage capacitor C0.

[0020] The discharge transistor Q1 further includes a first power terminal and a second power terminal; the first power terminal of the discharge transistor Q1 is electrically connected to the common connection terminal, and the second power terminal of the discharge transistor Q1 is connected to the discharge resistor R. s One end is electrically connected to the discharge resistor R. s The other end is electrically connected to the pre-amplifier connection terminal.

[0021] In one embodiment, the energy leakage control circuit includes a first operational amplifier U1, a first resistor R1, a second resistor R2, a first output terminal, a first input terminal, and a second input terminal;

[0022] The first output terminal of the energy dissipation control circuit is connected to the control terminal of the discharge transistor Q1, the first input terminal of the energy dissipation control circuit is connected to the fixed power and current setting unit, and the second input terminal of the energy dissipation control circuit is connected to the discharge current sampling feedback circuit.

[0023] One end of the first resistor R1 is connected to the output terminal of the first operational amplifier U1, and the other end is connected to the first output terminal of the energy dissipation control circuit.

[0024] One end of the second resistor R2 is connected to the first input terminal of the energy leakage control circuit, and the other end is connected to the negative input terminal of the first operational amplifier U1;

[0025] The positive input terminal of the first operational amplifier U1 is used as the second input terminal of the energy dissipation control circuit.

[0026] In one embodiment, the discharge current sampling feedback circuit includes a first connection terminal, a second connection terminal, a third connection terminal, a fourth connection terminal, a third resistor R3, a fourth resistor R4, and a fifth resistor R5;

[0027] The first connection terminal of the discharge current sampling feedback circuit is connected to the second power terminal of the discharge transistor Q1;

[0028] The second connection terminal of the discharge current sampling feedback circuit is connected to the first input terminal of the energy discharge control circuit.

[0029] The third connection terminal of the discharge current sampling feedback circuit is connected to the second input terminal of the energy discharge control circuit;

[0030] The fourth connection terminal of the discharge current sampling feedback circuit is connected to the front-end connection terminal;

[0031] One end of the third resistor R3 is connected to the first connection terminal of the discharge current sampling feedback circuit, and the other end is connected to the second connection terminal of the discharge current sampling feedback circuit.

[0032] One end of the fourth resistor R4 is connected to the third connection terminal of the discharge current sampling feedback circuit, and the other end is grounded;

[0033] One end of the fifth resistor R5 is connected to the third connection terminal of the discharge current sampling feedback circuit, and the other end is connected to the fourth connection terminal of the discharge current sampling feedback circuit.

[0034] In one embodiment, the subsequent current sampling feedback circuit includes a first connection terminal, a second connection terminal, a third connection terminal, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, and a second operational amplifier U2.

[0035] The first connection terminal of the subsequent current sampling feedback circuit is connected to the subsequent connection terminal, the second connection terminal of the subsequent current sampling feedback circuit is connected to the first input terminal of the energy leakage control circuit, and the third connection terminal of the subsequent current sampling feedback circuit is connected to the preceding connection terminal.

[0036] One end of the sixth resistor R6 is connected to the second connection terminal of the subsequent current sampling feedback circuit, and the other end is connected to the output terminal of the second operational amplifier U2.

[0037] One end of the seventh resistor R7 is connected to the negative input terminal of the second operational amplifier U2, and the other end is connected to the third connection terminal of the subsequent current sampling feedback circuit.

[0038] One end of the eighth resistor R8 is connected to the positive input terminal of the second operational amplifier U2, and the other end is grounded;

[0039] One end of the ninth resistor R9 is connected to the negative input terminal of the second operational amplifier U2, and the other end is connected to the output terminal of the second operational amplifier U2;

[0040] One end of the tenth resistor R10 is connected to the first connection terminal of the subsequent current sampling feedback circuit, and the other end is connected to the positive input terminal of the second operational amplifier U2.

[0041] In one embodiment, the voltage feedback acquisition unit includes a first connection terminal, a second connection terminal, a third connection terminal, a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, and a third operational amplifier U3;

[0042] The first connection terminal of the voltage feedback acquisition unit is connected to the common connection terminal, the second connection terminal of the voltage feedback acquisition unit is connected to the fixed power and current setting unit, and the third connection terminal of the voltage feedback acquisition unit is connected to the subsequent stage connection terminal.

[0043] The output terminal of the third operational amplifier U3 is connected to the second connection terminal of the voltage feedback acquisition unit;

[0044] One end of the twelfth resistor R12 is connected to the negative input terminal of the third operational amplifier U3, and the other end is connected to the third connection terminal of the voltage feedback acquisition unit or the first connection terminal of the voltage feedback acquisition unit.

[0045] One end of the thirteenth resistor R13 is connected to the positive input terminal of the third operational amplifier U3, and the other end is grounded;

[0046] One end of the fourteenth resistor R14 is connected to the negative input terminal of the third operational amplifier U3, and the other end is connected to the output terminal of the third operational amplifier U3.

[0047] One end of the fifteenth resistor R15 is connected to the first connection terminal of the voltage feedback acquisition unit, and the other end is connected to the positive input terminal of the third operational amplifier U3 or the first connection terminal of the voltage feedback acquisition unit.

[0048] The fixed power and current setting unit includes a first connection terminal, a second connection terminal, a third connection terminal, a fourth operational amplifier U4, a multiplier chip U5, an eleventh resistor R11, a sixteenth resistor R16, and a seventeenth resistor R17.

[0049] The first connection terminal of the fixed power and current setting unit is connected to the second connection terminal of the voltage feedback acquisition unit, the second connection terminal of the fixed power and current setting unit is connected to the reference voltage setting circuit, and the third connection terminal of the fixed power and current setting unit is connected to the energy leakage control circuit. The multiplier chip U5 includes a first pin, a second pin, a third pin, a fourth pin, a fifth pin, a sixth pin, a seventh pin, and an eighth pin. The second, fourth, and eighth pins of the multiplier chip U5 are grounded. The third pin of the multiplier chip U5 is used for the input of a negative working voltage VCC. The sixth pin of the multiplier chip U5 is used for the input of a positive working voltage VCC. The seventh pin of the multiplier chip U5 is connected to the first connection terminal of the fixed power and current setting unit.

[0050] One end of the eleventh resistor R11 is connected to the fifth pin of the multiplier chip U5, and the other end is connected to the second connection terminal of the fixed power and current setting unit.

[0051] One end of the sixteenth resistor R16 is connected to the first pin of the multiplier chip U5, and the other end is connected to the output terminal of the fourth operational amplifier U4;

[0052] One end of the seventeenth resistor R17 is connected to the first pin of the multiplier chip U5, and the other end is connected to the third connection terminal of the fixed power and current setting unit.

[0053] One input terminal of the fourth operational amplifier U4 is grounded, and the other input terminal is connected to the second connection terminal of the fixed power and current setting unit.

[0054] In one embodiment, the fixed power and current setting unit further includes a voltage limiting module connected between the first pin of the multiplier chip U5 and ground; the voltage limiting module is used to limit the upper limit of the voltage of the energy discharge drive signal; in another embodiment, the voltage limiting module includes a first Zener diode D1, one end of which is connected to the first pin of the multiplier chip U5, and the other end is grounded.

[0055] In one embodiment, the power discharge control device further includes:

[0056] An enable signal control circuit is used to turn off the conduction of the discharge transistor Q1 by electrically connecting a power terminal and a control terminal of the discharge transistor Q1 in response to a preset enable signal cut-off.

[0057] According to the above embodiment of the power discharge control device, since the conduction degree of the discharge transistor is dynamically controlled based on the discharge current feedback signal and the subsequent voltage feedback signal, the device dynamically adapts to the changes in the stored potential energy of the energy storage device, so that the discharge power and current of the discharge circuit are stable and controllable, and a faster discharge rate can be achieved while keeping the discharge power and current constant. Attached Figure Description

[0058] Figure 1 This is a functional structural connection block diagram of a power discharge control device in one embodiment;

[0059] Figure 2 This is a circuit connection diagram of the power discharge control device in one embodiment;

[0060] Figure 3 This is a functional structure connection block diagram of the power discharge control device in another embodiment;

[0061] Figure 4 This is a circuit connection diagram of the power discharge control device in another embodiment;

[0062] Figure 5This is a circuit connection diagram of the energy discharge control device when the reference ground of the energy storage power supply is negative in one embodiment.

[0063] Figure 6 This is a circuit connection diagram of the energy discharge control device when the reference ground of the energy storage power supply is positive in one embodiment;

[0064] Figure 7 This is a circuit connection diagram of the energy discharge control device when the reference ground of the energy storage power supply is positive in another embodiment;

[0065] Figure 8 A schematic diagram of the two-variable equation curves for the discharge current with respect to the instantaneous voltage and output current of the subsequent stage.

[0066] Figure 9 A schematic diagram of the two-variable equation curves for discharging power with respect to the instantaneous voltage and output current of the subsequent stage.

[0067] Figure 10 A comparison graph of the time curves of the remaining voltage;

[0068] Figure 11 A comparison graph of the time curves for the discharge current;

[0069] Figure 12 A comparison graph of the time curves for discharging power. Detailed Implementation

[0070] The present invention will now be described in further detail with reference to specific embodiments and accompanying drawings. Similar elements in different embodiments are referred to by associated similar element reference numerals. In the following embodiments, many details are described to facilitate a better understanding of this application. However, those skilled in the art will readily recognize that some features may be omitted in different situations, or may be replaced by other elements, materials, or methods. In some cases, certain operations related to this application are not shown or described in the specification. This is to avoid obscuring the core parts of this application with excessive description. For those skilled in the art, detailed description of these related operations is not necessary; they can fully understand the related operations based on the description in the specification and general technical knowledge in the art.

[0071] Furthermore, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments. At the same time, the steps or actions in the method description can be rearranged or adjusted in a manner obvious to those skilled in the art. Therefore, the various orders in the specification and drawings are only for the clear description of a particular embodiment and do not imply a necessary order, unless otherwise stated that a particular order must be followed.

[0072] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages).

[0073] Power supply circuits contain large capacitors. When voltage drops, shutdowns, or abnormal protection are required, safe and rapid discharge is necessary. Discharge is applied as needed to generate discharge power. For adjustable power supplies and other scenarios requiring rapid voltage drops, discharge must be continuously connected, with the discharge power flexibly adjusted according to the scenario. Generally, there are two main categories of scenarios requiring discharge. The first is detecting signals and controlling the discharge circuit's on / off state. For example, the power supply voltage needs to be quickly cut off to prevent electric shock or circuit damage; abnormal overvoltage protection is needed, such as when a sudden decrease in load / shutdown causes inductive effects or other reasons leading to pulses or even breakdown discharges. The second category requires the discharge circuit to be continuously connected, such as adjustable power supplies requiring rapid voltage drops with specific voltage drop slope requirements. Discharge circuits in various scenarios have limitations on discharge power, and all require faster discharge, rapid control circuit response, and ease of implementation. Currently, most power discharge methods use resistor discharge, i.e., using resistors to discharge power. One method involves controlling the on / off state using transistors connected in series. The key is often how to detect signals and control the transistors, with the discharge power entirely borne by the resistors. Another type is a resistor connected in series with a transistor. The circuit controls the transistor to achieve a constant current, the resistor's power is constant, and the transistor's power decreases as the voltage drops. To increase the discharge speed, the only way is to control the resistor to maintain a constant current. However, in some operating scenarios, uncontrolled discharge operations (high power at the beginning of discharge or when the voltage is high, requiring high device specifications and heat dissipation; low power at the end of discharge or when the voltage is low, resulting in slow discharge) can affect surrounding electronic devices and heat dissipation.

[0074] In this embodiment, the discharge current is automatically adjusted according to the load to reduce the power as needed until the discharge ends, thereby ensuring that the discharge operation can be completed faster under the same discharge power and discharge current limitations.

[0075] Example 1:

[0076] Please refer to Figure 1 The diagram below shows the functional structure of a power discharge control device in one embodiment. The power discharge control device includes an energy storage circuit 1, a discharge circuit 2, a reference voltage setting circuit 8, a discharge control circuit 3, a subsequent voltage feedback circuit 4, a subsequent current sampling feedback circuit 5, a discharge current sampling feedback circuit 6, and an enable signal control circuit 7. The energy storage circuit 1 includes an energy storage device for storing stored electrical energy. The discharge circuit 2 includes a discharge resistor R connected in series. sAnd a discharge transistor Q1, and connected in parallel with the energy storage device of energy storage circuit 1, used to discharge the energy through the discharge transistor Q1 and the discharge resistor R when the discharge transistor Q1 is turned on. s Release the stored electrical energy from the energy storage device. The reference voltage setting circuit 8 outputs a reference voltage signal with a preset voltage value. The discharge current sampling feedback circuit 6 is used to control the current flowing through the discharge resistor R when the discharge transistor Q1 is turned on. s The discharge current is sampled, and a discharge current sampling feedback signal is output based on the obtained discharge sampling current. The voltage value of the discharge current sampling feedback signal is positively correlated with the current value of the discharge current. The discharge control circuit 3, connected to the control terminal of the discharge transistor Q1, is used to control the conduction level of the discharge transistor Q1 based on the reference voltage signal and the discharge current sampling feedback signal, thereby dynamically controlling the discharge current of the discharge circuit. In one embodiment, the discharge transistor Q1 is an NMOS transistor.

[0077] In one embodiment, the downstream voltage feedback circuit 4 is used to monitor the storage voltage of the energy storage device and output a downstream voltage feedback signal based on the storage voltage. The discharge control circuit 3 is used to control the conduction level of the discharge transistor Q1 based on the downstream voltage feedback signal, the reference voltage signal, and the discharge sampling feedback signal.

[0078] Please refer to Figure 2 This is a circuit connection diagram of the power discharge control device in one embodiment. In one embodiment, the energy storage device is an energy storage capacitor C0, and the energy storage circuit 1 also includes a current sampling resistor R0, which is connected in series with the energy storage capacitor C0. The subsequent current sampling feedback circuit 5 is used to sample the subsequent current flowing through the current sampling resistor R0, and output a subsequent current sampling feedback electrical signal based on the obtained subsequent current sampling. The power discharge control circuit 3 is used to control the conduction degree of the discharge transistor Q1 based on the subsequent current sampling feedback electrical signal, the subsequent voltage feedback electrical signal, the reference voltage signal, and the power discharge current sampling feedback electrical signal. In one embodiment, the discharge circuit 2 also includes a fuse FUSE, connected in series with the discharge resistor R0. s It is connected in series with the discharge transistor Q1.

[0079] like Figure 2 As shown, the energy storage circuit 1 also includes a downstream connection terminal, a upstream connection terminal, and a common connection terminal. A current-sampling resistor R0 is connected in series with the energy storage capacitor C0. The end of the resistor connected in series with R0 serves as the downstream connection terminal, the end connected in series with the energy storage capacitor C0 serves as the common connection terminal, and the connection point between the current-sampling resistor R0 and the energy storage capacitor C0 serves as the upstream connection terminal. The upstream connection terminal and the common connection terminal serve as the upstream power supply connection terminals for storing energy in the energy storage capacitor C0, and the downstream connection terminal and the common connection terminal serve as the downstream power-consuming load connection terminals for discharging the stored energy in the energy storage capacitor C0. Figure 2 As shown, the front-end power supply connection terminal V IN+ and the connection terminal of the pre-amplifier power supply V IN - This terminal is electrically connected to both the pre-amplifier connection terminal and the common connection terminal, and is used to store energy in the energy storage capacitor C0. The power-consuming load connection terminal V... OUT + and the connection terminal of the downstream power-consuming load V OUT - This is electrically connected to both the downstream connection terminal and the common connection terminal, respectively, to discharge the stored energy of the energy storage capacitor C0. The downstream power-consuming load connection terminal V... OUT -or the pre-amplifier power supply connection terminal V IN - This serves as the reference ground for the power storage device. The discharge transistor Q1 also includes a first power terminal (drain) and a second power terminal (source). The first power terminal of the discharge transistor Q1 is electrically connected to the common connection terminal, and the second power terminal of the discharge transistor Q1 is connected to the discharge resistor R. s One end is electrically connected to the bleed resistor R. s The other end is electrically connected to the preamplifier terminal.

[0080] The energy dissipation control circuit 3 includes a first operational amplifier U1, a first resistor R1, a second resistor R2, a first output terminal, a first input terminal, and a second input terminal. The first output terminal of the energy dissipation control circuit 3 is connected to the control terminal of the discharge transistor Q1. The first input terminal of the energy dissipation control circuit 3 is connected to the reference voltage setting circuit 8. The second input terminal of the energy dissipation control circuit 3 is connected to the discharge current sampling feedback circuit 6. One end of the first resistor R1 is connected to the output terminal of the first operational amplifier U1, and the other end is connected to the first output terminal of the energy dissipation control circuit 3. One end of the second resistor R2 is connected to the first input terminal of the energy dissipation control circuit 3, and the other end is connected to the negative input terminal of the first operational amplifier U1. The positive input terminal of the first operational amplifier U1 is used as the second input terminal of the energy dissipation control circuit.

[0081] exist Figure 2In the circuit, the discharge current sampling feedback circuit 6 includes a first connection terminal, a second connection terminal, a third connection terminal, a fourth connection terminal, a third resistor R3, a fourth resistor R4, and a fifth resistor R5. The first connection terminal of the discharge current sampling feedback circuit is connected to the second power terminal of the discharge transistor Q1. The second connection terminal of the discharge current sampling feedback circuit is connected to the first input terminal of the discharge control circuit. The third connection terminal of the discharge current sampling feedback circuit is connected to the second input terminal of the discharge control circuit. The fourth connection terminal of the discharge current sampling feedback circuit is connected to the front-end connection terminal. One end of the third resistor R3 is connected to the first connection terminal of the discharge current sampling feedback circuit, and the other end is connected to the second connection terminal of the discharge current sampling feedback circuit. One end of the fourth resistor R4 is connected to the third connection terminal of the discharge current sampling feedback circuit, and the other end is grounded. One end of the fifth resistor R5 is connected to the third connection terminal of the discharge current sampling feedback circuit, and the other end is connected to the fourth connection terminal of the discharge current sampling feedback circuit. The current sampling feedback circuit includes a first connection terminal, a second connection terminal, a third connection terminal, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, and a second operational amplifier U2. The first connection terminal of the current sampling feedback circuit is connected to the subsequent stage connection terminal. The second connection terminal of the current sampling feedback circuit is connected to the first input terminal of the energy dissipation control circuit. The third connection terminal of the current sampling feedback circuit is connected to the preceding stage connection terminal. One end of the sixth resistor R6 is connected to the second connection terminal of the current sampling feedback circuit, and the other end is connected to the output terminal of the second operational amplifier U2. One end of the seventh resistor R7 is connected to the negative input terminal of the second operational amplifier U2, and the other end is connected to the third connection terminal of the current sampling feedback circuit. One end of the eighth resistor R8 is connected to the positive input terminal of the second operational amplifier U2, and the other end is grounded. One end of the ninth resistor R9 is connected to the negative input terminal of the second operational amplifier U2, and the other end is connected to the output terminal of the second operational amplifier U2. One end of the tenth resistor R10 is connected to the first connection terminal of the subsequent current sampling feedback circuit, and the other end is connected to the positive input terminal of the second operational amplifier U2. The subsequent voltage feedback circuit includes a first connection terminal, a second connection terminal, a third connection terminal, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, and a third operational amplifier U3. The first connection terminal of the subsequent voltage feedback circuit is connected to the common connection terminal, the second connection terminal is connected to the first input terminal of the energy dissipation control circuit, and the third connection terminal is connected to the subsequent connection terminal. One end of the eleventh resistor R11 is connected to the second connection terminal of the subsequent voltage feedback circuit, and the other end is connected to the output terminal of the third operational amplifier U3. One end of the twelfth resistor R12 is connected to the negative input terminal of the third operational amplifier U3, and the other end is connected to the third connection terminal of the subsequent voltage feedback circuit. One end of the thirteenth resistor R13 is connected to the positive input terminal of the third operational amplifier U3, and the other end is grounded.One end of the fourteenth resistor R14 is connected to the negative input terminal of the third operational amplifier U3, and the other end is connected to the output terminal of the third operational amplifier U3. One end of the fifteenth resistor R15 is connected to the first connection terminal of the subsequent voltage feedback circuit, and the other end is connected to the positive input terminal of the third operational amplifier U3.

[0082] In one embodiment, the enable signal control circuit 7 is used to turn off the conduction of the discharge transistor Q1 by electrically connecting a power terminal and a control terminal of the discharge transistor Q1 in response to a preset enable signal cut-off. In another embodiment, the enable signal control circuit 7 includes an optocoupler U6, which is used for opto-isolation of the enable signal cut-off. The optocoupler U6 includes a first input connection terminal, a second input connection terminal, a first isolated output terminal, and a second isolated output terminal. The first input connection terminal of the optocoupler U6 serves as the input terminal of the enable signal cut-off, and the second input connection terminal of the optocoupler U6 is connected to the reference ground of the enable signal cut-off. The first isolated output terminal of the optocoupler U6 is connected to the control terminal of the discharge transistor Q1, and the second isolated output terminal of the optocoupler U6 is connected to a power terminal of the discharge transistor Q1.

[0083] The reference voltage setting circuit 8 includes a first connection terminal, a second connection terminal, and an eighteenth resistor R18. The two ends of the eighteenth resistor R18 are connected to the first and second connection terminals of the reference voltage setting circuit, respectively. The first connection terminal of the reference voltage setting circuit is used as the reference voltage signal -V. ref The input terminal of the reference voltage setting circuit is connected to the second connection terminal of the energy dissipation control circuit 3.

[0084] Please refer to Figure 3 The diagram below shows the functional structure connection of the energy discharge control device in another embodiment. The downstream voltage feedback circuit 4 includes a voltage feedback acquisition unit 41 and a fixed power and current setting unit 42. The voltage feedback acquisition unit 41 is used to sample the storage voltage of the energy storage device to obtain the downstream voltage feedback electrical signal. The fixed power and current setting unit 42 is used to convert the voltage values ​​of the downstream voltage feedback electrical signal and the reference voltage signal according to a preset fixed power and feedback signal conversion formula to obtain the discharge control voltage value of the discharge according to a preset fixed power, and output the energy discharge drive signal with the voltage of the discharge control voltage value, so that the energy discharge control circuit 3 can control the conduction degree of the discharge transistor Q1 according to the voltage value of the energy discharge drive signal.

[0085] Please refer to Figure 4The diagram below illustrates the circuit connection of the power discharge control device in another embodiment. The voltage feedback acquisition unit 41 includes a first connection terminal, a second connection terminal, a third connection terminal, a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, and a third operational amplifier U3. The first connection terminal of the voltage feedback acquisition unit 41 is connected to a common connection terminal. The second connection terminal of the voltage feedback acquisition unit 41 is connected to a fixed power and current setting unit 42. The third connection terminal of the voltage feedback acquisition unit 41 is connected to a subsequent stage connection terminal. The output terminal of the third operational amplifier U3 is connected to the second connection terminal of the voltage feedback acquisition unit 41. One end of the twelfth resistor R12 is connected to the negative input terminal of the third operational amplifier U3, and the other end is connected to either the third connection terminal or the first connection terminal of the voltage feedback acquisition unit 41. One end of the thirteenth resistor R13 is connected to the positive input terminal of the third operational amplifier U3, and the other end is grounded. One end of the fourteenth resistor R14 is connected to the negative input terminal of the third operational amplifier U3, and the other end is connected to the output terminal of the third operational amplifier U3. One end of the fifteenth resistor R15 is connected to either the first or third connection terminal of the voltage feedback acquisition unit 41, and the other end is connected to the positive input terminal of the third operational amplifier U3. Specifically, when the twelfth resistor R12 is connected to the third connection terminal of the voltage feedback acquisition unit 41, the fifteenth resistor R15 is connected to the first connection terminal of the voltage feedback acquisition unit 41; conversely, when the twelfth resistor R12 is connected to the first connection terminal of the voltage feedback acquisition unit 41, the fifteenth resistor R15 is connected to the third connection terminal of the voltage feedback acquisition unit 41.

[0086] The fixed power and current setting unit 42 includes a first connection terminal, a second connection terminal, a third connection terminal, a fourth operational amplifier U4, a multiplier chip U5, and an eleventh resistor R11, a sixteenth resistor R16, and a seventeenth resistor R17. The first connection terminal of the fixed power and current setting unit 42 is connected to the second connection terminal of the voltage feedback acquisition unit 41, the second connection terminal of the fixed power and current setting unit 42 is connected to the reference voltage setting circuit 8, and the third connection terminal of the fixed power and current setting unit 42 is connected to the energy dissipation control circuit 3. The multiplier chip U5 includes a first pin, a second pin, a third pin, a fourth pin, a fifth pin, a sixth pin, a seventh pin, and an eighth pin. The second, fourth, and eighth pins of the multiplier chip U5 are grounded. The third pin of the multiplier chip U5 is used for the input of a negative operating voltage VCC, the sixth pin of the multiplier chip U5 is used for the input of a positive operating voltage VCC, and the seventh pin of the multiplier chip U5 is connected to the first connection terminal of the fixed power and current setting unit 42. One end of the eleventh resistor R11 is connected to the fifth pin of the multiplier chip U5, and the other end is connected to the second connection terminal of the fixed power and current setting unit 42. One end of the sixteenth resistor R16 is connected to the first pin of the multiplier chip U5, and the other end is connected to the output terminal of the fourth operational amplifier U4. One end of the seventeenth resistor R17 is connected to the first pin of the multiplier chip U5, and the other end is connected to the third connection terminal of the fixed power and current setting unit. One input terminal of the fourth operational amplifier U4 is grounded, and the other input terminal is connected to the second connection terminal of the fixed power and current setting unit. In one embodiment, the fixed power and current setting unit 42 further includes a voltage limiting module connected between the first pin of the multiplier chip U5 and ground. The voltage limiting module is used to limit the upper limit of the voltage of the discharge drive signal. In one embodiment, the voltage limiting module includes a first Zener diode D1, one end of which is connected to the first pin of the multiplier chip U5, and the other end is grounded.

[0087] like Figure 4 As shown, the reference voltage setting circuit 8 includes a first connection terminal, a second connection terminal, and an eighteenth resistor R18. The two ends of the eighteenth resistor R18 are connected to the first and second connection terminals of the reference voltage setting circuit, respectively. The first connection terminal of the reference voltage setting circuit 8 is used as a reference voltage signal V. ref The second connection terminal of the reference voltage setting circuit 8 is connected to one input terminal of the fourth operational amplifier U4. When the reference voltage signal V... ref When the value is positive, the second connection terminal of the reference voltage setting circuit 8 is connected to the negative input terminal of the fourth operational amplifier U4, the positive input terminal of the fourth operational amplifier U4 is grounded, the preamplifier connection terminal is connected to one end of R12, and the common terminal is connected to one end of R15.

[0088] Please refer to Figure 5This is a circuit connection diagram of the energy discharge control device when the reference ground of the energy storage power supply is negative in one embodiment. When the reference voltage signal V ref When the value is negative, the second connection terminal of the reference voltage setting circuit 8 is connected to the positive input terminal of the fourth operational amplifier U4, the negative input terminal of the fourth operational amplifier U4 is grounded, the preamplifier connection terminal is connected to one end of R15, and the common terminal is connected to one end of R12.

[0089] To facilitate understanding of the operation of each functional circuit in the energy discharge control device disclosed in the embodiments of this application, the following is a description through specific embodiments, including:

[0090] The energy discharge control device disclosed in this embodiment is designed for application scenarios requiring long-term access to the discharge function. When the power circuit has no output load, i.e., the "current sampling of the subsequent current sampling feedback circuit" is zero, the energy storage capacitor C0 to be discharged can only be discharged through the internal "discharge device and current sampling (discharge resistor R)". s The internal discharge device and current sampling device (Q1) are used to discharge the stored energy. When the power supply has an output load, the internal discharge device and current sampling device can be reduced or even turned off accordingly. The discharge control circuit receives signals including the downstream current sampling feedback signal, the downstream voltage feedback signal, the reference voltage signal, and the discharge current sampling feedback signal to control the current flowing through the discharge device.

[0091] like Figure 4 As shown, cut-off is the enable signal from the "enable requirement". When the enable signal cut-off is low, the enable is active and the bleeder circuit operates; when the enable signal cut-off is high, the enable is disabled and the bleeder circuit stops. Under the condition that the bleeder circuit has a maximum allowable bleeder power Pmax and a maximum bleeder current Imax, to theoretically achieve the fastest bleedering speed, the bleeder current I is controlled to be the smaller of the current value obtained by dividing Pmax by the instantaneous subsequent voltage Vout and Imax, that is:

[0092] I = min(Pmax / Vout, Imax);

[0093] It can be described as discharging at a fixed Pmax when the voltage of the downstream stage is high, and discharging at a fixed Imax when the voltage of the downstream stage is low, discharging at a fixed power and a fixed current.

[0094] like Figure 2 As shown, the enable signal cut-off is an enable signal from the "detection circuit or other enable requirements". When the enable signal cut-off is low, the enable is active and the power discharge control device starts working. When the enable signal cut-off is high, the enable is deactivated and the power discharge control device stops working.

[0095] In the embodiments of this application, two cases with different reference grounds for the energy storage power supply are considered: one is that the reference ground for the energy storage power supply is negative, and the other is that the reference ground for the energy storage power supply is positive.

[0096] Let's start with... Figure 4 Taking the power storage power supply with the ground as negative as shown, the discharge transistor Q1 bears most of the discharge power, and the discharge resistor R... s It undertakes a small portion of the discharge power. When the enable signal cut-off is low, the optocoupler U6 is turned off, which is equivalent to its non-existence. The power discharge control device starts working normally, and the enable is effective. When the enable signal cut-off is high, the optocoupler U6 is turned on, pulling the control levels of the gate and source of the discharge transistor Q1 to zero. The power discharge control device cannot work, and the enable is turned off.

[0097] 1) Regarding the discharge current sampling feedback circuit.

[0098] When enabled, the positive input terminal of the first operational amplifier U1 is grounded or at a near-zero level, forming an adder. The positive level feedback signal from the current sampling feedback circuit is input to the negative input terminal of the first operational amplifier U1. The low-level signal is connected to the positive input terminal of the first operational amplifier U1 via the third resistor R3, where R3 = R5. A fourth resistor R4 is connected between the positive input terminal of the first operational amplifier U1 and ground. After setting the value of the fourth resistor R4, it can be equivalent to the positive input terminal of the first operational amplifier U1 being grounded, and the differential positive level obtained from the current sampling being connected to the negative input terminal of the first operational amplifier U1 via the fifth resistor R5.

[0099] 2) Regarding the feedback circuit for the current sampling stage.

[0100] If the power supply has no output load (i.e., the "current sampling of the subsequent stage" is zero), the discharge circuit should operate normally. If there is an output load, the discharge circuit can be reduced or even turned off to reduce power consumption and improve energy efficiency. The feedback signal from the current sampling of the subsequent stage is set to a positive level (the output of the second operational amplifier is positive). Similarly, it is introduced to the negative input terminal of the first operational amplifier U1 through the sixth resistor R6 to suppress the positive level signal. When there is current in the subsequent stage, the magnitude of the discharge current is suppressed by a certain proportion.

[0101] 3) Regarding the subsequent voltage feedback circuit.

[0102] To discharge at a fixed power and limit the discharge current, a subsequent voltage feedback circuit needs to convert the voltage values ​​of the subsequent voltage feedback signal and the reference voltage signal according to a preset fixed power to feedback signal conversion formula. This conversion yields the discharge control voltage value for discharging at the preset fixed power, and outputs a discharge drive signal equal to this control voltage value. This discharge drive signal (negative level) is connected to the negative input terminal of the first operational amplifier U1 via the second resistor R2. The negative level of the discharge drive signal corresponds to the following discharge current I:

[0103] I = min(Pmax / Vout, Imax);

[0104] In one embodiment, the multiplier chip U5 is model AD633 (other multiplier chips can also achieve the same effect). It is based on the third operational amplifier U3 obtaining the voltage feedback signal from the subsequent stage and the fourth operational amplifier U4 and the fifth operational amplifier U5 obtaining the energy discharge drive signals (fixed power and current). There are two equivalent implementation methods for this configuration:

[0105] 1. Equivalent implementation method one.

[0106] The subsequent voltage feedback circuit reduces the instantaneous subsequent voltage Vout by a certain ratio and realizes the conversion of differential signal to single-ended signal. R12=R15, R14=R13, and the output of the third operational amplifier U3 is +Vout*R15 / R13.

[0107] The operating output of multiplier chip U5 is W=(X1-X2)*(Y1-Y2) / (10V), according to... Figure 4 With the connection shown, we can obtain X1 = +Vout*R15 / R13, W = X1*Y1 / 10V. According to the fourth operational amplifier U4, we can obtain W / R11 + Vref / R18 = 0. Calculating Y1, we get Y1 = -10V*Vref*R11*R15 / (Vout*R18*R13). This shows that Y1 is a negative level and a constant divided by Vout, which allows for fixed-power discharge.

[0108] I = Pmax / Vout;

[0109] When Vout=0, X1=0, W=0, the negative input of the fourth operational amplifier U4 is positive, the output of the fourth operational amplifier U4 is at its maximum negative value, and Y1 is also at its maximum negative value but is clamped by the Zener diode. When +Vout increases, X1>0 increases, Y1<0, W<0 becomes negative, the negative input of the fourth operational amplifier U4 tends to be negative, the output of the fourth operational amplifier U4 is <0 and tends to be zero, and Y1<0, if not clamped, also tends to be zero.

[0110] 2. Equivalent implementation method two.

[0111] The subsequent voltage feedback circuit reduces the instantaneous subsequent voltage Vout by a certain ratio and realizes the conversion of differential signal to single-ended signal. R12=R15, R13=R14, and the output of the third operational amplifier U3 is -Vout*R15 / R13.

[0112] The operating output of multiplier chip U5 is W=(X1-X2)*(Y1-Y2) / (10V), according to... Figure 5 With the connection shown, we can obtain X1 = -Vout*R15 / R13, W = X1*Y1 / 10V. According to the fourth operational amplifier U4, we can obtain W / R11 - Vref / R18 = 0. Calculating Y1, we get Y1 = -10V*Vref*R11*R15 / (Vout*R18*R13). This shows that Y1 is a negative level and a constant divided by Vout. Therefore, "fixed power" discharge can be achieved.

[0113] I = Pmax / Vout.

[0114] When Vout=0, X1=0, W=0, the negative input of the fourth operational amplifier U4 is negative, and the output of the fourth operational amplifier U4 is at its maximum negative value. Y1 is also at its maximum negative value but is clamped by the Zener diode. When +Vout increases, X1<0 becomes negative, Y1<0, and W>0 becomes positive. The positive input of the fourth operational amplifier U4 tends to be positive, and the output of the fourth operational amplifier U4 is <0, tending to zero. If Y1<0 is not clamped, it also tends to zero.

[0115] 4) Regarding the subsequent current feedback circuit.

[0116] If Vout decreases while the power discharge remains constant, the discharge current I will increase and exceed Imax. Therefore, it is necessary to limit the above I=Pmax / Vout, that is, to limit the negative level Y1. Specifically, a sixteenth resistor R16 and a Zener diode D1 are introduced. When the absolute value of the negative level Y1 is too large, the Zener diode D1 will regulate and limit it to a fixed value, which corresponds to I=Imax when the current is "fixed".

[0117] At this time, at the negative input terminal of the first operational amplifier U1, we have:

[0118] (I*R S ) / R5+(Y1) / R17+V(U2) / R6=0.

[0119] 5) Regarding the value of the fourth resistor R4.

[0120] Define the voltages at the positive and negative terminals of the first operational amplifier U1 as y, and the bleeder resistor R S The voltage at the low potential terminal is z, and R... S The voltage at the high potential terminal is:

[0121] I*RS +z, then:

[0122] z / y=(R3+R4) / R4=1+R3 / R4.

[0123] At the negative input terminal of the first operational amplifier U1:

[0124] (I*R S +zy) / R5+(Y1-y) / R17+(V(U2)-y) / R6=0;

[0125] Choose a value for R4 such that (zy) / R5 + (-y) / R17 + (-y) / R6 = 0, that is:

[0126] z / y = 1 + R5 * (1 / R17 + 1 / R6);

[0127] Since R5 = R2, we can get 1 / R4 = 1 / R17 + 1 / R6, which means:

[0128] R4 = 1 / (1 / R17 + 1 / R6) = R17 / / R6.

[0129] After determining the value of the fourth resistor R4, we have:

[0130] (I*R S ) / R5+(Y1) / R17+V(U2) / R6=0,

[0131] This formula is the same as the formula obtained for the subsequent current feedback circuit, which proves that "after determining the value of the fourth resistor R4, it is equivalent to grounding the positive input terminal of the first operational amplifier U1, and the differential positive level obtained from the current sampling is connected to the negative input terminal of the first operational amplifier U1 through R5".

[0132] In this embodiment, the maximum voltage of the energy storage power supply is set to 30V, the capacitance of the energy storage capacitor C0 is 1000uF, the maximum discharge power Pmax is limited to 2W and the maximum discharge current Imax is 0.25A due to the limitations of the device and heat dissipation conditions. The application scenario is to quickly discharge the energy after the energy storage power supply is powered off. The parameters of the electronic devices are set sequentially according to the above-mentioned circuit function implementation methods.

[0133] a. Selection of venting type R S =1Ω, R5=R3=10K, R4 to be determined. Equivalently, the positive input terminal of the first operational amplifier U1 is grounded, and the differential positive level I*1Ω obtained from the current sampling is connected to the negative input terminal of the first operational amplifier U1 via a 10KΩ resistor. When there is a 0.1A discharge current, R... S The pressure difference is 0.1V.

[0134] b. When there is a downstream current, it can offset half of the downstream current's discharge current. Selection R S =0.01Ω, R7=R10=1K, R9=R8=100K, R6=20K. When the current of the subsequent stage is 0.2A, the output of the second operational amplifier U2 is 0.2V, which is introduced to the negative input terminal of the first operational amplifier U1 through 20K, which is equivalent to 0.1V being introduced to the negative input terminal of the first operational amplifier U1 through 10K, which is equivalent to canceling the 0.1A discharge current.

[0135] c. A negative voltage level Y1 is required, connected to the negative input terminal of the first operational amplifier U1 via R17. This negative voltage level corresponds to a preset discharge current that satisfies fixed power and fixed current, i.e., I = min(Pmax / Vout, Imax). There are two equivalent implementation methods for this negative voltage level, both using R12=R15=100K, R13=R14=10K, R11=10K, and R18=100K. Both methods result in W = X1*Y1 / 10V.

[0136] Equivalent implementation method one (such as) Figure 4 (as shown)

[0137] The selected positive reference voltage signal Vref is +2.5V, and the output of the third operational amplifier U3 is X1 = +Vout / 10. W / 10K + 2.5V / 100K = 0, so Y1 = -10V * 2.5V / Vout is calculated.

[0138] Equivalent implementation method two (such as) Figure 5 (as shown)

[0139] The selected negative reference voltage signal Vref is -2.5V, and the output of the third operational amplifier U3 is X1 = -Vout / 10. W / 10K - 2.5V / 100K = 0, so Y1 = -10V * 2.5V / Vout is calculated.

[0140] When there is no current in the subsequent stage, at the negative input terminal of the first operational amplifier U1:

[0141] I*1Ω / 10K+Y1 / R17=0;

[0142] That is, I = [10V * 2.5V * 10K / (R17 * 1Ω)] / Vout;

[0143] Given that for a fixed power discharge, I = Pmax / Vout, we can obtain:

[0144] 10V*2.5V*10K / (R17*1Ω)=Pmax=2W, therefore R17=125K.

[0145] d.Imax=0.25A, i.e., I∈[0,0.25A]. According to the negative input terminal of the first operational amplifier U1, we have:

[0146] I*1Ω / 10K+Y1 / 125K=0;

[0147] We can obtain Y1∈[-3.125V,0], and select a 3.125V Zener diode or an equivalent solution for the Zener diode D1.

[0148] By controlling Y1 = -min(10V*2.5V / Vout, 3.125V), the maximum value of the discharge current I can be controlled, achieving I = min(2W / Vout, 0.25A), where V ∈ [0, 30V]. At this point, the negative input terminal of the first operational amplifier U1 has:

[0149] (I*1Ω) / 10K+(Y1) / 125K+(Iout*0.01Ω*100) / 20K=0.

[0150] e. Determine the value of R4, that is:

[0151] R4=1 / (1 / R17+1 / R6)=1 / (1 / 125K+1 / 20K)≈17.241K.

[0152] Please refer to Figure 6 and Figure 7 This is a circuit connection diagram of the energy discharge control device when the energy storage power supply reference ground is positive in one embodiment, wherein... Figure 6 Reference voltage signal V ref When the value is negative, the second connection terminal of the reference voltage setting circuit 8 is connected to the negative input terminal of the fourth operational amplifier U4, the positive input terminal of the fourth operational amplifier U4 is grounded, the preamplifier connection terminal is connected to one end of R15, and the common terminal is connected to one end of R12. Figure 7 Reference voltage signal V ref When the value is positive, the second connection terminal of the reference voltage setting circuit 8 is connected to the positive input terminal of the fourth operational amplifier U4, the negative input terminal of the fourth operational amplifier U4 is grounded, the preamplifier connection terminal is connected to one end of R12, and the common terminal is connected to one end of R15.

[0153] The following is an example Figure 6 Taking the positive terminal of the energy storage power source as an example, the energy discharge process of the energy discharge control device disclosed in this application embodiment is described by specifically setting the electrical parameter values, including:

[0154] The discharge transistor Q1 handles most of the discharge power, and the discharge resistor R... sIt undertakes a small portion of the discharge power. When the enable signal cut-off is low, the optocoupler U6 is turned off, which is equivalent to its non-existence. The power discharge control device starts working normally, and the enable is effective. When the enable signal cut-off is high, the optocoupler U6 is turned on, pulling the control levels of the gate and source of the discharge transistor Q1 to zero. The power discharge control device cannot work, and the enable is turned off.

[0155] 1) Regarding the discharge current sampling feedback circuit.

[0156] When enabled, the positive input terminal of the first operational amplifier U1 is grounded or at a near-zero level, forming an adder. The negative input signal (negative level) from the current sampling feedback circuit is input to the negative input terminal of the first operational amplifier U1. The high potential level is connected to the positive input terminal of the first operational amplifier U1 via the third resistor R3, where R3 = R5. A fourth resistor R4 is connected between the positive input terminal of the first operational amplifier U1 and ground. After setting the value of the fourth resistor R4, it can be equivalent to the positive input terminal of the first operational amplifier U1 being grounded, and the differential negative level obtained from the current sampling being connected to the negative input terminal of the first operational amplifier U1 via the fifth resistor R5.

[0157] 2) Regarding the feedback circuit for the current sampling stage.

[0158] If the power supply has no output load (i.e., the "current sampling of the subsequent stage" is zero), the discharge circuit should operate normally. If there is an output load, the discharge circuit can be reduced or even turned off to reduce power consumption and improve energy efficiency. The feedback signal from the current sampling of the subsequent stage is set to a negative level (the output of the second operational amplifier is negative). Similarly, it is introduced to the negative input terminal of the first operational amplifier U1 through the sixth resistor R6 to suppress the negative level signal. When there is current in the subsequent stage, the magnitude of the discharge current is suppressed by a certain proportion.

[0159] 3) Regarding the subsequent voltage feedback circuit.

[0160] To discharge at a fixed power and limit the discharge current, a subsequent voltage feedback circuit needs to convert the voltage values ​​of the subsequent voltage feedback signal and the reference voltage signal according to a preset fixed power to feedback signal conversion formula. This conversion yields the discharge control voltage value for discharging at a preset fixed power, and outputs a discharge drive signal (positive level) equal to this control voltage value. This discharge drive signal is connected to the negative input terminal of the first operational amplifier U1 via the second resistor R2. Since the discharge drive signal is positive, the corresponding discharge current I is:

[0161] I = min(Pmax / Vout, Imax);

[0162] In one embodiment, the multiplier chip U5 is model AD633 (other multiplier chips can also achieve the same effect). It is based on the third operational amplifier U3 obtaining the voltage feedback signal from the subsequent stage and the fourth operational amplifier U4 and the fifth operational amplifier U5 obtaining the energy discharge drive signals (fixed power and current). There are two equivalent implementation methods for this configuration:

[0163] 1. Equivalent implementation method one.

[0164] The subsequent voltage feedback circuit reduces the instantaneous subsequent voltage Vout by a certain ratio and realizes the conversion of differential signal to single-ended signal. R12=R15, R14=R13, and the output of the third operational amplifier U3 is +Vout*R15 / R13.

[0165] The operating output of multiplier chip U5 is W = (X1 - X2) * (Y1 - Y2) / (10V), according to... Figure 6 With the connection shown, we can obtain X1 = +Vout*R15 / R13, W = X1*Y1 / 10V. According to the fourth operational amplifier U4, we can obtain W / R11 - Vref / R18 = 0. Calculating Y1, we get Y1 = +10V*Vref*R11*R15 / (Vout*R18*R13). This shows that Y1 is a positive level and a constant divided by Vout, which allows for fixed-power discharge.

[0166] I = Pmax / Vout;

[0167] When Vout=0, X1=0, W=0, the negative input of the fourth operational amplifier U4 is positive, the output of the fourth operational amplifier U4 is at its maximum positive value, and Y1 is also at its maximum positive value but is clamped by the Zener diode. When +Vout increases, X1>0 increases, Y1>0 becomes positive, W>0 becomes positive, the negative input of the fourth operational amplifier U4 tends to be positive, the output of the fourth operational amplifier U4 is >0 and tends to be zero, and Y1>0, if not clamped, also tends to be zero.

[0168] 2. Equivalent implementation method two.

[0169] The subsequent voltage feedback circuit reduces the instantaneous subsequent voltage Vout by a certain ratio and realizes the conversion of differential signal to single-ended signal. R12=R15, R13=R14, and the output of the third operational amplifier U3 is -Vout*R15 / R13.

[0170] The operating output of multiplier chip U5 is W=(X1-X2)*(Y1-Y2) / (10V), according to... Figure 5With the connection shown, we can obtain X1 = -Vout*R15 / R13, W = X1*Y1 / 10V. According to the fourth operational amplifier U4, we can obtain W / R11 - Vref / R18 = 0. Calculating Y1, we get Y1 = 10V*Vref*R11*R15 / (Vout*R18*R13). Therefore, Y1 is a positive level and a constant divided by Vout. This allows us to achieve "fixed power" discharge.

[0171] I = Pmax / Vout.

[0172] When Vout=0, X1=0, W=0, the positive input of the fourth operational amplifier U4 is positive, the output of the fourth operational amplifier U4 is at its maximum positive value, and Y1 is also at its maximum positive value but is clamped by the Zener diode. When +Vout increases, X1<0 becomes negative, Y1>0, W<0 becomes negative, the positive input of the fourth operational amplifier U4 tends to be negative, the output of the fourth operational amplifier U4 is >0 and tends to be zero, and Y1>0, if not clamped, also tends to be zero.

[0173] 4) Regarding the subsequent current feedback circuit.

[0174] If Vout decreases while the power discharge remains constant, the discharge current I will increase and exceed Imax. Therefore, it is necessary to limit the above I=Pmax / Vout, that is, to limit the negative level Y1. Specifically, the sixteenth resistor R16 and Zener diode D1 are introduced. When the absolute value of the positive level Y1 is too large, Zener diode D1 will regulate and limit it to a fixed value, which corresponds to I=Imax when the current is "fixed".

[0175] At this time, at the negative input terminal of the first operational amplifier U1, we have:

[0176] (-I*R S ) / R5+(Y1) / R17+[-V(U2)] / R6=0.

[0177] 5) Regarding the value of the fourth resistor R4.

[0178] Define the voltages at the positive and negative terminals of the first operational amplifier U1 as y, and the bleeder resistor R S The voltage at the low potential terminal is z, and R... S The voltage at the high potential terminal is:

[0179] -I*R S +z, then:

[0180] z / y=(R3+R4) / R4=1+R3 / R4.

[0181] At the negative input terminal of the first operational amplifier U1:

[0182] (-I*R S+zy) / R5+(Y1-y) / R17+[-V(U2)-y] / R6=0;

[0183] Choose a value for R4 such that (zy) / R5 + (-y) / R17 + (-y) / R6 = 0, that is:

[0184] z / y = 1 + R5 * (1 / R17 + 1 / R6);

[0185] Since R5 = R2, we can get 1 / R4 = 1 / R17 + 1 / R6, which means:

[0186] R4 = 1 / (1 / R17 + 1 / R6) = R17 / / R6.

[0187] After determining the value of the fourth resistor R4, we have:

[0188] (-I*R S ) / R5+(Y1) / R17+[-V(U22)] / R6=0,

[0189] This formula is the same as the formula obtained for the subsequent current feedback circuit, which proves that "after determining the value of the fourth resistor R4, it is equivalent to grounding the positive input terminal of the first operational amplifier U1, and the differential positive level obtained from the current sampling is connected to the negative input terminal of the first operational amplifier U1 through R5".

[0190] In this embodiment, the maximum voltage of the energy storage power supply is set to 30V, the capacitance of the energy storage capacitor C0 is 1000uF, the maximum discharge power Pmax is limited to 2W and the maximum discharge current Imax is 0.25A due to the limitations of the device and heat dissipation conditions. The application scenario is to quickly discharge the energy after the energy storage power supply is powered off. The parameters of the electronic devices are set sequentially according to the above-mentioned circuit function implementation methods.

[0191] a. Selection of venting type R S =1Ω, R5=R3=10K, R4 to be determined. Equivalently, the positive input terminal of the first operational amplifier U1 is grounded, and the differential positive level -I*1Ω obtained from the current sampling is connected to the negative input terminal of the first operational amplifier U1 via a 10KΩ resistor. When there is a 0.1A discharge current, R... S The pressure difference is -0.1V.

[0192] b. When there is a downstream current, it can offset half of the downstream current's discharge current. Selection R S=0.01Ω, R7=R10=1K, R9=R8=100K, R6=20K. When the current of the subsequent stage is 0.2A, the output of the second operational amplifier U2 is -0.2V, which is introduced to the negative input terminal of the first operational amplifier U1 through 20K, which is equivalent to -0.1V being introduced to the negative input terminal of the first operational amplifier U1 through 10K, which is equivalent to canceling the 0.1A discharge current.

[0193] c. A negative voltage level Y1 is required, connected to the negative input terminal of the first operational amplifier U1 via R17. This negative voltage level corresponds to a preset discharge current that satisfies fixed power and fixed current, i.e., I = min(Pmax / Vout, Imax). There are two equivalent implementation methods for this negative voltage level, both using R12=R15=100K, R13=R14=10K, R11=10K, and R18=100K. Both methods result in W = X1*Y1 / 10V.

[0194] Equivalent implementation method one (such as) Figure 7 (as shown)

[0195] The selected positive reference voltage signal Vref is +2.5V, and the output of the third operational amplifier U3 is X1 = -Vout / 10. W / 10K + 2.5V / 100K = 0, so Y1 = +10V * 2.5V / Vout is calculated.

[0196] Equivalent implementation method two (such as) Figure 6 (as shown)

[0197] The selected negative reference voltage signal Vref is -2.5V, and the output of the third operational amplifier U3 is X1 = -Vout / 10. W / 10K - 2.5V / 100K = 0, so Y1 = +10V * 2.5V / Vout is calculated.

[0198] When there is no current in the subsequent stage, at the negative input terminal of the first operational amplifier U1:

[0199] -I*1Ω / 10K+Y1 / R17=0;

[0200] That is, I = [10V * 2.5V * 10K / (R17 * 1Ω)] / Vout;

[0201] Given that for a fixed power discharge, I = Pmax / Vout, we can obtain:

[0202] 10V*2.5V*10K / (R17*1Ω)=Pmax=2W, therefore R17=125K.

[0203] d.Imax=0.25A, i.e., I∈[0,0.25A]. According to the negative input terminal of the first operational amplifier U1, we have:

[0204] -I*1Ω / 10K+Y1 / 125K=0;

[0205] We can obtain Y1∈[-3.125V,0], and select a 3.125V Zener diode or an equivalent solution for the Zener diode D1.

[0206] By controlling Y1 = min(10V * 2.5V / Vout, 3.125V), the maximum value of the discharge current I can be controlled, achieving I = min(2W / Vout, 0.25A), where V ∈ [0, 30V]. At this point, the negative input terminal of the first operational amplifier U1 has:

[0207] (-I*1Ω) / 10K+(Y1) / 125K+(-Iout*0.01Ω*100) / 20K=0.

[0208] e. Determine the value of R4, that is:

[0209] R4=1 / (1 / R17+1 / R6)=1 / (1 / 125K+1 / 20K)≈17.241K.

[0210] Next, let's take... Figure 2 Taking the negative terminal as an example of the reference ground of the energy storage power source, the energy discharge process of the energy discharge control device in one embodiment of this application is described in terms of the specific method of setting electrical parameter values, specifically including:

[0211] The discharge transistor Q1 handles most of the discharge power, and the discharge resistor R... s It undertakes a small portion of the discharge power. When the enable signal cut-off is low, the optocoupler U6 is turned off, which is equivalent to its non-existence. The power discharge control device starts working normally, and the enable is effective. When the enable signal cut-off is high, the optocoupler U6 is turned on, pulling the control levels of the gate and source of the discharge transistor Q1 to zero. The power discharge control device cannot work, and the enable is turned off.

[0212] First, set the maximum current limit.

[0213] The preset reference voltage signal Vref is -2.5V, the maximum discharge current is 0.25A, the discharge resistor Rs has a resistance of 1Ω, R3=R5=10K, R18=100K, and the fuse FUSE can be a resettable fuse such as 0.4A. Let the discharge current be defined as I. According to Kirchhoff's current law, we have:

[0214] I*1Ω / R3+(-Vref / R18)=0.

[0215] Next, a subsequent voltage feedback circuit is introduced.

[0216] The feedback voltage signal from the subsequent stage is first reduced by a certain factor and converted from differential to single-ended to obtain a positive level, which is then introduced to the negative input terminal of the first operational amplifier U1 via R11. The factor is set to 1 / 10, i.e., R12=R15=100K, R14=R13=10K. The power supply voltage (voltage of the energy storage capacitor C0) is defined as Vout. Let R11=xK, then:

[0217] (I*1Ω) / 10K+(-2.5V) / 100K+(Vout / 10) / xK=0;

[0218] After simplification, we get:

[0219] I = (-Vout / x + 0.25V) / 1Ω;

[0220] The discharge power is:

[0221] P=Vout*I=-Vout*(Vout / x-0.25V) / 1Ω;

[0222] The above equation is a quadratic equation for P with respect to Vout. P = 0 when Vout = 0 or Vout = x * 0.25V, and reaches its maximum value when Vout = x * 0.125V. Considering that discharge capability is also required even when Vout is slightly greater than 30V, i.e., x * 0.25V must be slightly greater than 30V, we design x = 130, i.e., R3 = 130K, resulting in x * 0.25V = 32.5V. When Vout = 16.25V, P reaches its maximum value of 2.03125W. Therefore, the formula for obtaining the discharge current is:

[0223] (I*1Ω) / 10K+(-2.5V) / 100K+(Vout / 10) / 130K=0;

[0224] After simplification, we get:

[0225] I = (-Vout / 130 + 0.25V) / 1Ω;

[0226] Then, a subsequent current feedback circuit is introduced.

[0227] Setting the load current of the subsequent stage to twice the value can offset the internal discharge current of one time, achieving the same or faster voltage drop rate. The current sampling resistor R0 is set to 0.01Ω. The voltage difference across it is first amplified by a certain factor and converted from differential to single-ended to obtain a positive level, which is then introduced to the negative input terminal of the first operational amplifier U1 via R6. The factor is set to 100 times, i.e., R7=R10=1K, R8=R9=100K. The output current of the subsequent stage is set to Iout. From "twice", we get 2*I*0.01Ω*100 / R6=I*1Ω / 10K, meaning R6 needs to be designed to be 20K. Therefore:

[0228] (I*1Ω) / 10K+(-2.5V) / 100K+(Vout / 10) / 130K+(Iout*0.01Ω*100) / 20K=0;

[0229] Finally, precise dynamic adjustment is achieved.

[0230] By activating precise voltage and current feedback circuits in the subsequent stages, accurate voltage and current information is acquired. A differential-to-single-ended operational amplifier is used to scale the data to a more suitable range, reducing interference with the original circuit. Furthermore, a precise discharge current sampling feedback and selection mechanism is designed; the accurate characterization of the discharge current is determined by the discharge resistor R. s The differential signal at both ends has a bleed resistor R s The high potential terminal is introduced to the negative input terminal of the first operational amplifier U1 through R3=10K, and a bleed resistor R is also required. s The low potential is introduced to the positive input terminal of the first operational amplifier U1 through R5 = 10K, and is connected to ground through R4. Define the voltage between the positive and negative terminals of the first operational amplifier U1 as y, and the bleed resistor R... s If the low potential terminal voltage is z, then:

[0231] z / y=(10K+R4) / R4=1+10K / R4;

[0232] The formula can be obtained as follows:

[0233] (I*1Ω+zy) / 10K+(-2.5Vy) / 100K+(Vout / 10-y) / 130K+(Iout*0.01Ω*100-y) / 20K=0

[0234] If we determine the value of R4, then we have:

[0235] (zy) / 10K+(-y) / 100K+(-y) / 130K+(-y) / 20K=0;

[0236] That is, z / y = 1 + 1 / 10 + 1 / 13 + 1 / 2;

[0237] We can obtain:

[0238] R4=1⁄((1 / 100K+1 / 130K+1 / 20K));

[0239] That is, R5 = 100K / / 130K / / 20K, and R4 ≈ 14.773K, then:

[0240] (I*1Ω) / 10K+(-2.5V) / 100K+(Vout / 10) / 130K+(Iout*0.01Ω*100) / 20K=0;

[0241] After setting the connection and values ​​of R5 and R4 according to the above steps, the actual circuit obtained can be accurately expressed and described by the above formula.

[0242] Based on the above (using the negative terminal of the power supply as the reference ground and the positive terminal of the power supply as the reference ground), it can be seen that when there is a downstream current, it can offset half of the discharge current of the downstream current. Therefore, the formula for obtaining the discharge current is:

[0243] I=min(2W / Vout,0.25A)-Iout / 2;

[0244] The formula for obtaining the discharge power is:

[0245] P=Vout*I=Vout*[min(2W / Vout,0.25A)-Iout / 2];

[0246] Then you can refer to the following to obtain: Figure 8 and Figure 9 The diagram shows the discharge current I and discharge power P, with respect to Vout and Iout, and the two-variable equation curves.

[0247] The following comparison examines the energy storage discharge method disclosed in this application with the constant resistance and constant current methods in the prior art, focusing on three aspects: discharge of residual voltage (discharge time required), discharge current, and discharge power.

[0248] The unified working scenario is set as Iout=0, the output capacitor is 1000uF discharging from 30V to approximately 0V, the same maximum allowable power is 2W, and the discharge start point is when Vout=30V and t=0s.

[0249] The differential equation for a capacitor is I = 1000uF * dv / dt, and the current is negative when the capacitor discharges, Vout ∈ [0V, 30V].

[0250] 1. The energy storage and discharge method disclosed in this application shall be adopted.

[0251] Based on the time curves of the residual voltage V0, discharge current I0, and discharge power P0 of the power discharge control device disclosed in the embodiments of this application, since Iout=0, the above formula can be simplified to:

[0252] I = min(2W / V0, 0.25A);

[0253] The first stage of the discharge is constant power discharge, I0=2W / V0, the starting point is when V0=30V and t=0s, and the ending point is when I0=0.25A, at which point V0=8V.

[0254] From the differential equation, we get:

[0255] 1000uF*dv / dt=-2W / V0, integrating, we get:

[0256] V0² = -4000t + Cx, where Cx is a constant. Substituting the starting point, we get Cx = 900. When V0 = 8, we get t = 0.209s.

[0257] V0=(-4000t+900)^0.5, 0≤t≤0.209;

[0258] I0=2 / V0=2 / (-4000t+900)^(-0.5), 0≤t≤0.209;

[0259] P0=2, 0≤t≤0.209;

[0260] The second stage of the discharge is constant current discharge, I0=0.25A, starting at V0=8V and t=0.209s, and ending at V0=0.

[0261] From the differential equation, we get:

[0262] 1000uF*dv / dt=-0.25A, integrating, we get:

[0263] V0 = -250t + Cx, where Cx is a constant. Substituting the starting point, we get Cx = 60.25. When V0 = 0, we get t = 0.241s.

[0264] V0 = -250t + 60.25, 0.209 <t≤0.241;

[0265] I0 = 0.25, 0.209 <t≤0.241;

[0266] P0 = -62.5t + 15.0625, 0.209 <t≤0.241;

[0267] 2. Energy release is achieved using a constant resistance method.

[0268] Based on the time curves of the remaining voltage V1, discharge current I1, and discharge power P1, the minimum resistance value needs to be selected to achieve the fastest speed. Rmin = 30V * 30V / 2W = 450Ω, and the discharge current is I1 = V1 / 450Ω.

[0269] From the differential equation, we get:

[0270] 1000uF*dv / dt=-V1 / 450Ω;

[0271] Integrating, we get t = -0.45ln|V1| + Cx, where Cx is a constant. Substituting this into the starting point, we get Cx = 0.45ln30.

[0272] To get V1 to 0V, t approaches infinity. Let's assume 0.1V is the discharge end point. When V1 = 0.1V, we get t = 0.45ln300 ≈ 2.567s.

[0273] From the relationship between t and V1, we get:

[0274] V1 = 30e^(-t / 0.45);

[0275] I1 = 30e^(-t / 0.45) / 450;

[0276] P1=(30e^(-t / 0.45))² / 450.

[0277] Third, energy release is carried out using a constant current method.

[0278] Based on the time curves of the remaining voltage V2, discharge current I2, and discharge power P2, the maximum current value needs to be selected to achieve the fastest speed. Imax = 2W / 30V ≈ 0.0667A, so we select 0.067A, and the discharge current is I2 = 0.067A.

[0279] From the differential equation, we get:

[0280] 1000uF*dv / dt=-0.067A, integrating gives V2=-67t+Cx, where Cx is a constant, substituting into the starting point gives Cx=30.

[0281] When V2 = 0V, we get t = 30 / 67 ≈ 0.448s.

[0282] From the relationship between t and V2, and considering that V2 will remain at 0V after discharging to 0, we get:

[0283] V2 = max(-67t + 30, 0);

[0284] I2=0.067A, t≤30 / 67≈0.448s;

[0285] P2=(-67t+30)*0.067, t≤30 / 67≈0.448s.

[0286] Please refer to Figure 10 , Figure 11 and Figure 12 The figures are schematic diagrams comparing the three aspects (residual voltage, discharge current, and discharge power) of the three energy dissipation methods on the time axis. It can be seen from the time required for the residual voltage to reach zero that, under the same scenario and power constraints, the energy dissipation method disclosed in this application requires a shorter time than the constant current method and is far superior to the existing constant resistance method. Under limited power conditions, the discharge current and power can be increased as much as possible, thereby achieving a faster overall discharge speed.

[0287] It should be noted that the multiplier chip and control or setting functional module unit (MCU / FPGA) involved in the embodiments of this application are relatively expensive and have a slower response speed than analog devices such as operational amplifiers. To reduce costs and improve speed, in one embodiment, the feedback voltage can be directly connected to the negative terminal of the MOSFET-controlled operational amplifier to suppress or reduce the discharge current. Under the same power and current constraints, this method has a slower discharge speed, but it is still better than the constant resistance and constant current methods mentioned above. In addition to the above-mentioned optocoupler hardware control scheme / software control scheme after the control module receives the signal, the enable function can also be implemented by introducing a positive or negative voltage at the negative terminal of the MOSFET-controlled operational amplifier through an optocoupler, forcing the operational amplifier to turn off the discharge MOSFET. There are other differential-to-single-ended conversion methods for subsequent voltage feedback and subsequent current feedback, but since they are not the focus of this invention, they will not be described here.

[0288] The energy discharge control device disclosed in this application includes an energy storage circuit for storing stored potential energy, a discharge circuit for releasing the stored potential energy through a discharge resistor and a discharge transistor connected in series, a reference voltage setting circuit for outputting a reference voltage signal, a discharge current sampling feedback circuit for outputting a discharge current sampling feedback signal based on the discharge sampling current of the discharge resistor, and a subsequent voltage feedback circuit for outputting a subsequent voltage feedback signal based on the stored potential voltage. It also includes controlling the conduction degree of the discharge transistor based on the subsequent voltage feedback signal, the reference voltage signal, and the discharge current sampling feedback signal. Because the conduction degree of the discharge transistor is dynamically controlled based on the discharge current sampling feedback signal and the subsequent voltage feedback signal, it dynamically adapts to changes in the stored potential energy of the energy storage device, making the discharge power and current of the discharge circuit stable and controllable, and achieving a faster discharge rate while maintaining constant discharge power and current.

[0289] The above examples illustrate the present invention only to aid in understanding it and are not intended to limit the scope of the invention. Those skilled in the art can make various simple deductions, modifications, or substitutions based on the principles of this invention.

Claims

1. An electrical energy discharge control device, characterized in that... ,include: An energy storage circuit, including an energy storage device, wherein the energy storage device is used to store stored electrical energy; The bleeder circuit includes a bleeder resistor R connected in series. s And a discharge transistor Q1, and connected in parallel with the energy storage device of the energy storage circuit, for use when the discharge transistor Q1 is turned on, through the discharge transistor Q1 and the discharge resistor R s Release the stored electrical energy from the energy storage device; A reference voltage setting circuit is used to output a reference voltage signal with a preset voltage value. The bleed current sampling feedback circuit is used to provide feedback to the current flowing through the bleed current resistor R when the bleed current transistor Q1 is turned on. s The discharge current is sampled, and a discharge current sampling feedback signal is output based on the obtained discharge sampling current. The voltage value of the discharge current sampling feedback signal is positively correlated with the current value of the discharge current. The subsequent voltage feedback circuit is used to monitor the storage voltage of the energy storage device and output a subsequent voltage feedback electrical signal based on the storage voltage. A discharge control circuit is connected to the control terminal of the discharge transistor Q1 and is used to control the conduction degree of the discharge transistor Q1 based on the subsequent voltage feedback signal, the reference voltage signal, and the discharge sampling feedback signal.

2. The power discharge control device as described in claim 1, characterized in that, The energy storage device is an energy storage capacitor C0; the energy storage circuit also includes a current sampling resistor R0; the current sampling resistor R0 is connected in series with the energy storage capacitor C0; The power discharge control device also includes: The post-stage current sampling feedback circuit is used to sample the post-stage current flowing through the sampling resistor R0, and output the post-stage current sampling feedback electrical signal based on the obtained post-stage sampled current. The discharge control circuit is used to control the conduction degree of the discharge transistor Q1 based on the subsequent current sampling feedback signal, the subsequent voltage feedback signal, the reference voltage signal, and the discharge current sampling feedback signal.

3. The power discharge control device as described in claim 2, characterized in that, The subsequent voltage feedback circuit includes a voltage feedback acquisition unit and a fixed power and current setting unit. The voltage feedback acquisition unit is used to sample the storage voltage of the energy storage device to obtain the subsequent voltage feedback electrical signal. The fixed power and current setting unit is used to convert the voltage values ​​of the subsequent voltage feedback signal and the reference voltage signal according to a preset fixed power and feedback signal conversion formula, so as to obtain the discharge control voltage value of the discharge according to a preset fixed power, and output the discharge drive signal with the voltage of the discharge control voltage value, so as to control the conduction degree of the discharge transistor Q1 according to the voltage value of the discharge drive signal.

4. The power discharge control device as described in claim 3, characterized in that, The energy storage circuit also includes a downstream connection terminal, a front-end connection terminal, and a common connection terminal; The current-collecting resistor R0 is connected in series with the energy storage capacitor C0. One end of the current-collecting resistor R0 is used as the downstream connection terminal, and the other end of the current-collecting resistor R0 is used as the common connection terminal. The connection terminal of the current-collecting resistor R0 and the energy storage capacitor C0 is used as the upstream connection terminal. The upstream connection terminal and the common connection terminal are used as the upstream power supply connection terminals for storing energy in the energy storage capacitor C0. The downstream connection terminal and the common connection terminal are used as the downstream power-consuming load connection terminals for discharging the stored energy in the energy storage capacitor C0. The discharge transistor Q1 further includes a first power terminal and a second power terminal; the first power terminal of the discharge transistor Q1 is electrically connected to the common connection terminal, and the second power terminal of the discharge transistor Q1 is connected to the discharge resistor R. s One end is electrically connected to the discharge resistor R. s The other end is electrically connected to the pre-amplifier connection terminal.

5. The power discharge control device as described in claim 4, characterized in that, The energy dissipation control circuit includes a first operational amplifier U1, a first resistor R1, a second resistor R2, a first output terminal, a first input terminal, and a second input terminal; The first output terminal of the energy dissipation control circuit is connected to the control terminal of the discharge transistor Q1, the first input terminal of the energy dissipation control circuit is connected to the fixed power and current setting unit, and the second input terminal of the energy dissipation control circuit is connected to the discharge current sampling feedback circuit. One end of the first resistor R1 is connected to the output terminal of the first operational amplifier U1, and the other end is connected to the first output terminal of the energy dissipation control circuit. One end of the second resistor R2 is connected to the first input terminal of the energy leakage control circuit, and the other end is connected to the negative input terminal of the first operational amplifier U1; The positive input terminal of the first operational amplifier U1 is used as the second input terminal of the energy dissipation control circuit.

6. The power discharge control device as described in claim 5, characterized in that, The discharge current sampling feedback circuit includes a first connection terminal, a second connection terminal, a third connection terminal, a fourth connection terminal, a third resistor R3, a fourth resistor R4, and a fifth resistor R5; The first connection terminal of the discharge current sampling feedback circuit is connected to the second power terminal of the discharge transistor Q1; The second connection terminal of the discharge current sampling feedback circuit is connected to the first input terminal of the energy discharge control circuit. The third connection terminal of the discharge current sampling feedback circuit is connected to the second input terminal of the energy discharge control circuit; The fourth connection terminal of the discharge current sampling feedback circuit is connected to the front-end connection terminal; One end of the third resistor R3 is connected to the first connection terminal of the discharge current sampling feedback circuit, and the other end is connected to the second connection terminal of the discharge current sampling feedback circuit. One end of the fourth resistor R4 is connected to the third connection terminal of the discharge current sampling feedback circuit, and the other end is grounded; One end of the fifth resistor R5 is connected to the third connection terminal of the discharge current sampling feedback circuit, and the other end is connected to the fourth connection terminal of the discharge current sampling feedback circuit.

7. The power discharge control device as described in claim 6, characterized in that, The subsequent current sampling feedback circuit includes a first connection terminal, a second connection terminal, a third connection terminal, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, and a second operational amplifier U2. The first connection terminal of the subsequent current sampling feedback circuit is connected to the subsequent connection terminal, the second connection terminal of the subsequent current sampling feedback circuit is connected to the first input terminal of the energy leakage control circuit, and the third connection terminal of the subsequent current sampling feedback circuit is connected to the preceding connection terminal. One end of the sixth resistor R6 is connected to the second connection terminal of the subsequent current sampling feedback circuit, and the other end is connected to the output terminal of the second operational amplifier U2. One end of the seventh resistor R7 is connected to the negative input terminal of the second operational amplifier U2, and the other end is connected to the third connection terminal of the subsequent current sampling feedback circuit. One end of the eighth resistor R8 is connected to the positive input terminal of the second operational amplifier U2, and the other end is grounded; One end of the ninth resistor R9 is connected to the negative input terminal of the second operational amplifier U2, and the other end is connected to the output terminal of the second operational amplifier U2. One end of the tenth resistor R10 is connected to the first connection terminal of the subsequent current sampling feedback circuit, and the other end is connected to the positive input terminal of the second operational amplifier U2.

8. The power discharge control device as described in claim 6, characterized in that, The voltage feedback acquisition unit includes a first connection terminal, a second connection terminal, a third connection terminal, a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, and a third operational amplifier U3; The first connection terminal of the voltage feedback acquisition unit is connected to the common connection terminal, the second connection terminal of the voltage feedback acquisition unit is connected to the fixed power and current setting unit, and the third connection terminal of the voltage feedback acquisition unit is connected to the subsequent stage connection terminal. The output terminal of the third operational amplifier U3 is connected to the second connection terminal of the voltage feedback acquisition unit; One end of the twelfth resistor R12 is connected to the negative input terminal of the third operational amplifier U3, and the other end is connected to the third connection terminal of the voltage feedback acquisition unit or the first connection terminal of the voltage feedback acquisition unit. One end of the thirteenth resistor R13 is connected to the positive input terminal of the third operational amplifier U3, and the other end is grounded; One end of the fourteenth resistor R14 is connected to the negative input terminal of the third operational amplifier U3, and the other end is connected to the output terminal of the third operational amplifier U3. One end of the fifteenth resistor R15 is connected to the first connection terminal or the third connection terminal of the voltage feedback acquisition unit, and the other end is connected to the positive input terminal of the third operational amplifier U3. The fixed power and current setting unit includes a first connection terminal, a second connection terminal, a third connection terminal, a fourth operational amplifier U4, a multiplier chip U5, an eleventh resistor R11, a sixteenth resistor R16, and a seventeenth resistor R17. The first connection terminal of the fixed power and current setting unit is connected to the second connection terminal of the voltage feedback acquisition unit, the second connection terminal of the fixed power and current setting unit is connected to the reference voltage setting circuit, and the third connection terminal of the fixed power and current setting unit is connected to the energy leakage control circuit. The multiplier chip U5 includes a first pin, a second pin, a third pin, a fourth pin, a fifth pin, a sixth pin, a seventh pin, and an eighth pin. The second, fourth, and eighth pins of the multiplier chip U5 are grounded. The third pin of the multiplier chip U5 is used for the input of a negative working voltage VCC. The sixth pin of the multiplier chip U5 is used for the input of a positive working voltage VCC. The seventh pin of the multiplier chip U5 is connected to the first connection terminal of the fixed power and current setting unit. One end of the eleventh resistor R11 is connected to the fifth pin of the multiplier chip U5, and the other end is connected to the second connection terminal of the fixed power and current setting unit. One end of the sixteenth resistor R16 is connected to the first pin of the multiplier chip U5, and the other end is connected to the output terminal of the fourth operational amplifier U4; One end of the seventeenth resistor R17 is connected to the first pin of the multiplier chip U5, and the other end is connected to the third connection terminal of the fixed power and current setting unit. One input terminal of the fourth operational amplifier U4 is grounded, and the other input terminal is connected to the second connection terminal of the fixed power and current setting unit.

9. The power discharge control device as described in claim 8, characterized in that, The fixed power and current setting unit also includes a voltage limiting module connected between the first pin of the multiplier chip U5 and ground; the voltage limiting module is used to limit the upper limit of the voltage of the energy discharge drive signal.

10. The power discharge control device as described in claim 1, characterized in that, Also includes: An enable signal control circuit is used to turn off the conduction of the discharge transistor Q1 by electrically connecting a power terminal and a control terminal of the discharge transistor Q1 in response to a preset enable signal cut-off.

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