Energy storage power supply and control circuit thereof

Abstract

The application discloses an energy storage power supply and a control circuit thereof. In the control circuit, a load detection module is electrically connected with a small-power output loop and a main output loop. The load detection module is used for detecting the size of an external load of the energy storage power supply and sending a first load signal or a second load signal. The small-power output loop is used for receiving the first load signal and starting work according to the first load signal, so as to supply power to the external load of the energy storage power supply through a circuit in which the small-power output loop is located. The main output loop is used for receiving the second load signal and starting work according to the second load signal, so as to supply power to the external load of the energy storage power supply through a circuit in which the main output loop is located. The control circuit of the energy storage power supply of the application adds the load detection module and the small-power output loop, increases the power supply channel of the energy storage power supply under the condition of no load or small load, reduces the power consumption of the energy storage power supply under the condition of no load or small load, and prolongs the endurance time.

Description

Technical Field

[0001] This application relates to the field of energy storage technology, and in particular to an energy storage power supply and its control circuit. Background Technology Currently, portable energy storage products consume a relatively high amount of power when they are in an unloaded or low-load state, resulting in poor battery life.

[0002] Understandably, when the external load of a portable energy storage product is small or there is no external load, the no-load power consumption accounts for most of the total power consumption, which will affect the battery life of the energy storage product and make its battery performance poor. Utility Model Content

[0003] In view of this, this application aims to at least partially solve one of the problems in the related art. Therefore, the object of this application is to provide an energy storage power supply and its control circuit.

[0004] This application provides a control circuit for an energy storage power supply. The control circuit includes: a load detection module, a low-power output circuit, and a main output circuit. The load detection module is electrically connected to both the low-power output circuit and the main output circuit. The load detection module detects the magnitude of the external load connected to the energy storage power supply and sends a first load signal or a second load signal. The low-power output circuit receives the first load signal and starts operating according to the first load signal to supply power to the external load of the energy storage power supply through the circuit containing the low-power output circuit. The main output circuit receives the first load signal and stops operating according to the first load signal. The main output circuit receives the second load signal and starts operating according to the second load signal to supply power to the external load of the energy storage power supply through the circuit containing the main output circuit. The low-power output circuit receives the second load signal and stops operating according to the second load signal.

[0005] This application also provides an energy storage power source. The energy storage power source includes the control circuit described in the above embodiments.

[0006] Thus, the control circuit of the energy storage power supply in this application adds a load detection module and a low-power output circuit. It can start working when the low-power output circuit receives the first load signal sent by the load detection module, thereby increasing the power supply channels of the energy storage power supply under no-load or low-load conditions, reducing the power consumption of the energy storage power supply under no-load or low-load conditions, and improving the battery life.

[0007] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0008] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein: Figure 1 This is a schematic diagram of the control circuit of the energy storage power supply according to certain embodiments of this application; Figure 2 This is a schematic diagram of the control circuit of the energy storage power supply according to certain embodiments of this application; Figure 3 This is a schematic diagram of the structure of the low-power AC output circuit in the energy storage power supply according to certain embodiments of this application; Figure 4 This is a schematic diagram of the structure of a low-power DC output circuit in an energy storage power supply according to certain embodiments of this application; Figure 5 This is a schematic diagram of the AC main output circuit in the energy storage power supply according to certain embodiments of this application; Figure 6 This is a schematic diagram of the DC main output circuit in the energy storage power supply according to certain embodiments of this application; Figure 7 This is a schematic diagram of the structure of the main output circuit of the energy storage power supply including the first load detection unit in some embodiments of this application; Figure 8 This is a schematic diagram of the control circuit of the energy storage power supply according to certain embodiments of this application; Figure 9 This is a schematic diagram of the structure of the second load detection unit in the control circuit of the energy storage power supply in some embodiments of this application; Figure 10 This is a schematic diagram of the current-based load detection circuit of the energy storage power supply according to certain embodiments of this application. Figure 11 This is a schematic diagram of the current-based load detection circuit of the energy storage power supply according to certain embodiments of this application. Figure 12 This is a schematic diagram of the control circuit of the energy storage power supply according to certain embodiments of this application; Figure 13 This is a schematic diagram of the structure of the second load detection unit in the control circuit of the energy storage power supply in some embodiments of this application; Figure 14 This is a schematic diagram of the structure of the second load detection unit in the control circuit of the energy storage power supply in some embodiments of this application; Figure 15 This is a schematic diagram of the voltage-based load detection circuit of the energy storage power supply according to certain embodiments of this application; Figure 16This is a schematic diagram of the voltage-based load detection circuit of the energy storage power supply according to certain embodiments of this application; Figure 17 This is a schematic diagram of the structure of the second load detection unit in the control circuit of the energy storage power supply in some embodiments of this application; Figure 18 This is a schematic diagram of the power load detection circuit of the energy storage power supply according to certain embodiments of this application; Figure 19 This is a schematic diagram of the power load detection circuit of the energy storage power supply according to certain embodiments of this application; Figure 20 This is a schematic diagram of the control circuit of the energy storage power supply according to certain embodiments of this application; Figure 21 This is a schematic diagram of the control circuit of the energy storage power supply according to certain embodiments of this application; Figure 22 This is a partial structural schematic diagram of the control circuit of the energy storage power supply in some embodiments of this application; Figure 23 This is a partial structural schematic diagram of the control circuit of the energy storage power supply according to certain embodiments of this application. Detailed Implementation

[0009] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0010] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance, or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0011] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly, referring to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections, or connections that allow communication between components; direct connections or indirect connections through an intermediate medium; and connections within two components or interactions between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0012] The following disclosure provides many different implementations or examples for carrying out different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various implementations and / or arrangements discussed.

[0013] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0014] Please see Figure 1 This application provides a control circuit 100 for an energy storage power supply 1000. The control circuit 100 includes a load detection module 10, a low-power output circuit 20, and a main output circuit 30. The load detection module 10 is electrically connected to both the low-power output circuit 20 and the main output circuit 30. The load detection module 10 detects the magnitude of the external load of the energy storage power supply 100 and sends a first load signal or a second load signal. The low-power output circuit 20 receives the first load signal and starts operating according to the first load signal to supply power to the external load of the energy storage power supply 1000 through the circuit containing the low-power output circuit 20. The main output circuit 30 receives the first load signal and stops operating according to the first load signal. The main output circuit 30 receives the second load signal and starts operating according to the second load signal to supply power to the external load of the energy storage power supply 1000 through the circuit containing the main output circuit 30. The low-power output circuit 20 receives the second load signal and stops operating according to the second load signal.

[0015] Specifically, the load detection module 10 can detect the size of the external load of the energy storage power supply 100 through methods such as current detection, voltage detection, or power calculation. The larger the current, the smaller the load; conversely, the smaller the current, the larger the load.

[0016] The current detection method can be to connect a Hall current detector in series in the load circuit to detect the magnitude of the current flowing through the load circuit, thereby determining the size of the external load.

[0017] The voltage detection method involves directly measuring the voltage across the external load, thereby determining the size of the external load based on the voltage across the load. A higher voltage indicates a larger load, and a lower voltage indicates a smaller load.

[0018] The power detection method specifically involves synchronously sampling the voltage across the external load and the current flowing through it. The power of the external load is calculated based on these parameters, thus indirectly reflecting the size of the load. Higher power indicates a larger load, and lower power indicates a smaller load.

[0019] Compared to traditional energy storage power supply control circuits, this application adds a load detection module 10 and a low-power output circuit 20 to the control circuit 100 of the energy storage power supply 1000. The load detection module 10 detects the size of the external load on the energy storage power supply 100. When the load is small, the load detection module 10 outputs a first load signal. The first load signal can be a current, voltage, or other form of electrical signal. After receiving the first load signal, the low-power output circuit 20 activates to carry the load, reducing power consumption.

[0020] Among them, such as Figure 2 As shown, the load detection module 10 may include an alternating current (AC) load detection circuit and a direct current (DC) load detection circuit. The AC load detection circuit is used to detect the magnitude of the external load when outputting AC power to the external load. The DC load detection circuit is used to detect the magnitude of the external load when outputting DC power to the external load.

[0021] The low-power output circuit 20 may include a low-power output circuit 21 corresponding to AC output and a low-power output circuit 22 corresponding to DC output. The low-power output circuit 21 corresponding to AC output is activated to carry the load after receiving a first load signal when an external load receives AC power, thereby reducing power consumption. The low-power output circuit 22 corresponding to DC output is activated to carry the load after receiving a first load signal when an external load receives DC power, thereby reducing power consumption.

[0022] like Figure 3 and Figure 4As shown, the low-power output circuit 21 corresponding to the AC output may include a DC / AC converter, an operational amplifier circuit, precision resistors, and other electrical components; the low-power output circuit 22 corresponding to the DC output may include a DC / DC converter, an operational amplifier circuit, precision resistors, and other electrical components. The DC / AC or DC / DC converter contains a certain number of switching devices. The precision resistors and operational amplifier circuit on the main output circuit 20 are primarily responsible for high-current monitoring and protection, achieving overcurrent protection. The precision resistors and operational amplifier circuit on the low-power output circuit 20 are primarily responsible for high-precision control and protocol communication, enabling multi-protocol fast charging support and high-precision constant voltage / constant current output.

[0023] The main output circuit 30 may include an alternating current (AC) main output circuit 31 and a direct current (DC) main output circuit 32. When the external load is a large load and receives AC power, the AC main output circuit in the main output circuit 30 receives a second load signal and starts operating according to the second load signal to supply power to the external load of the energy storage power supply 1000 through the circuit containing the AC main output circuit 31. When the external load is a large load and receives DC power, the DC main output circuit in the main output circuit 30 receives a second load signal and starts operating according to the second load signal to supply power to the external load of the energy storage power supply 1000 through the circuit containing the DC main output circuit 32. The second load signal may be a current, voltage, or other form of electrical signal.

[0024] like Figure 5 and Figure 6 As shown, the AC main output circuit 31 may include operational amplifier circuits, precision resistors, DC / AC converters, DC / DC converters, and other electrical components. The DC main output circuit 32 may include operational amplifier circuits, precision resistors, DC / DC converters, and other electrical components. The precision resistor can be connected in series in either the AC or DC main output circuit 31, and the size of the external load can be determined by measuring the small voltage drop across the precision resistor. The DC / AC or DC / DC converter contains a certain number of switching devices.

[0025] In detail, in a traditional energy storage power product 1 with an output power of X, the energy storage power product 1 includes a BMS main circuit, an AC main output circuit A1, and a DC main output circuit A2. Its working principle is to start the BMS main circuit, AC main output circuit A1, and DC main output circuit A2 to supply power to the external load. If the AC main output circuit A1 has δ switching devices, the corresponding output capacity is X1. A1 requires δ switching devices to continuously switch states to operate normally, with a corresponding power loss of P1. A2 has β switching devices, the corresponding output capacity is X2. A2 requires β switching devices to continuously switch states to operate normally, with a corresponding power loss of P2. Starting A1 and A2 requires running drive circuits a1 and a2. The power consumption of a1 is P3, and the power consumption of a2 is P4. The BMS main circuit has θ switching devices, with a corresponding power consumption of P5. The power consumption of other circuits in the product is P6, and X = X1 + X2. Therefore, the power consumption of energy storage power product 1 is PMAX = P1 + P2 + P3 + P4 + P5 + P6.

[0026] Based on the control circuit of the traditional energy storage power product 1, energy storage power product 2 adds an AC low-power output circuit B1, a DC low-power output circuit B2, an AC load detection circuit C1, and a DC load detection circuit C2. In addition, energy storage power product 2 also has a BMS pre-charge circuit, which is connected in parallel with the BMS main circuit. The AC low-power output circuit B1 has η switching devices, corresponding to an output capacity of Y1. Normal operation of the AC low-power output circuit B1 requires η switching devices to continuously switch states, with a corresponding power loss of P11. The DC low-power output circuit B2 has ε switching devices, corresponding to an output capacity of Y2. Normal operation of the DC low-power output circuit B2 requires ε switching devices to continuously switch states, with a corresponding power loss of P12. Starting B1 and B2 requires the operation of drive circuits b1 and b2. The power consumption of drive circuit b1 is P13, and the power consumption of drive circuit b2 is P14. Assume that the operating power consumption of the AC load detection circuit C1 is P15, and the operating power consumption of the DC load detection circuit C2 is P16. The pre-charge circuit within the BMS control loop has Φ switching devices, corresponding to a power consumption of P17. The power consumption of other circuits in energy storage power product 1 is P18. When energy storage power supply 1000 is in full-power output mode, it needs to activate the BMS main circuit, A1, and A2, and deactivate the B1, B2, C1 detection circuit, and C2 detection circuit; the product power consumption is PMAX. When energy storage power supply 1000 is in low-power output mode, it activates the BMS pre-charge circuit and the B1, B2, C1, and C2 circuits within the BMS control loop, and deactivates the BMS main circuit, A1, and A2 circuits within the BMS control loop. Therefore, the self-power consumption of energy storage power product 2 is PMIN = P11 + P12 + P13 + P14 + P15 + P16 + P17 + P18.

[0027] Understandably, since Y1 is much smaller than X1, η < δ, corresponding to circuit power loss P11 < P1. A characteristic of power circuits is that the greater the output power, the stronger the required driving capability, and the greater the corresponding driving power consumption. Since Y1 is much smaller than X1, the driving circuit power consumption P13 < P3. Since Y2 is much smaller than X2, ε < β, corresponding to circuit power loss P12 < P2. A characteristic of power circuits is that the greater the output power, the stronger the required driving capability, and the greater the corresponding driving power consumption. Since Y2 is much smaller than X2, the driving circuit power consumption P14 < P4. Since Y is much smaller than X, Φ < θ, corresponding to power loss in the BMS control loop P17 < P5. Furthermore, since the power consumption of the load detection module is very small, i.e., P13≈0, P14≈0, P15≈0, P16≈0, while P6 and P18 are unaffected by the output power and are considered fixed power consumption, i.e., P5 = P17. Therefore, PMIN≈P11+P12+P13+P14+P15+P16+P17+P18<P1+P2+P3+P4+P5+P6=PMAX, from which we can deduce PMIN<PMAX.

[0028] In other words, the energy storage power supply 1000 of this application adds a small-load channel B and a load detection circuit C to the circuit architecture of the traditional energy storage power supply product 1. When the external load is detected to be small and less than a preset threshold Y, it indicates that the power demand is small. The control circuit 100 can automatically turn on the small-load output channel B and the load detection module C, and turn off the main output circuits A1 and A2. At this time, the power consumption of the control circuit 100 of the energy storage power supply 1000 is reduced from PMAX to PMIN.

[0029] Understandably, if the power consumption of the energy storage power supply 1000 is reduced while the capacity of the energy storage power supply 1000 remains unchanged, then the battery life of the energy storage power supply 1000 will be longer.

[0030] Additionally, when the external load is greater than or equal to a preset threshold Y, it indicates a high power demand, triggering the load detection module C to output a second load signal. Then, upon receiving the second load signal, the main output circuits A1 and A2 activate to handle the load, ensuring output stability. Alternatively, upon receiving a large load signal, the main output circuits A1 and A2 activate to increase the output capacity of the energy storage power supply 1000 to power the large load, thus ensuring the stability of the energy output of the energy storage power supply 1000.

[0031] Thus, the control circuit 100 of the energy storage power supply 100 of this application adds a load detection module 10 and a low-power output circuit 20. The low-power output circuit 20 can start working when it receives the first load signal sent by the load detection module 10, thereby increasing the power supply channels of the energy storage power supply 1000 under no-load or low-load conditions, reducing the power consumption of the energy storage power supply 1000 under no-load or low-load conditions, and improving the battery life.

[0032] Please see Figure 7 In some embodiments, the load detection module 10 includes a first load detection unit 11. The main output circuit 30 includes a first number of switching devices 31 and the first load detection unit 11, which is connected in series with the switching devices 31. The first load detection unit 11 is used to detect the magnitude of the current on the main output circuit 30 to detect the magnitude of the external load of the energy storage power supply 100 and to issue a first load signal. The low-power output circuit 20 includes a second number of switching devices 21, where the first number is greater than the second number.

[0033] Specifically, switching devices include devices such as MOSFETs, IGBTs, and relays, without limitation.

[0034] That is, the first quantity is, for example, δ and β as mentioned above, and the second quantity is, for example, η and ε as mentioned above. Since Y1 is much smaller than X1, η < δ, corresponding to circuit power loss P11 < P1. A characteristic of power circuits is that the greater the output power, the stronger the required driving capability, and the greater the corresponding driving power consumption. Since Y1 is much smaller than X1, therefore, the driving circuit power consumption P13 < P3. Since Y2 is much smaller than X2, ε < β, corresponding to circuit power loss P12 < P2.

[0035] Furthermore, the first load detection unit 11 may include a traditional Hall current sensor integrated into the energy storage power supply. The Hall current sensor detects the current magnitude in the main output circuit 30, thereby detecting the external load size of the energy storage power supply 100. The Hall current sensor can non-contactly measure the current flowing through the main output circuit 30 using the principle of magnetic induction. A larger current indicates a smaller external load on the energy storage power supply 100, and a smaller current indicates a larger external load.

[0036] Therefore, the energy storage power supply 1000 of this application adds a small load channel B and a load detection module C to the circuit architecture of the traditional energy storage power supply product 1. When the external load is detected to be small and less than a preset threshold Y, the control circuit 100 can automatically turn on the small load channel B and the load detection module C. The small load channel B includes an AC output low-power output circuit B1 and a DC output low-power output circuit B2, and turns off the main output circuits A1 and A2, which can reduce the power consumption of the control circuit 100 of the energy storage power supply 1000.

[0037] In some embodiments, the first load detection unit 11 is further configured to issue a first load signal when it detects that the external load is less than or equal to a first load threshold for a preset time.

[0038] Specifically, the first load threshold can be the impedance value of the load, for example, the first load threshold can be Y as mentioned above. The first load threshold of the external load corresponds one-to-one with the current threshold corresponding to the current on the main output circuit 30. The preset time t can be 15 seconds, 18 seconds, 20 seconds, 22 seconds, 23 seconds, 25 seconds, 28 seconds, 30 seconds, 1 minute, or 2 minutes, and is not limited here.

[0039] In other words, when the first load detection unit 11 of this application detects that the current on the main output circuit 30 is less than or equal to a first current value and exceeds a preset time t, it indicates that the impedance value of the external load of the current energy storage power supply 1000 is continuously less than the first load threshold Y and exceeds the preset time t. Therefore, the first load detection unit 11 can issue a first load signal at this time, thereby controlling the automatic opening of the low-power output circuit 20 to carry the load according to the first load signal, thereby reducing the power consumption of the energy storage power supply 1000.

[0040] In some embodiments, the first load detection unit 11 further includes a timer. The timer is used to start timing when an external load is detected to be less than or equal to a first load threshold, and to issue a first load signal when the timing time is greater than or equal to a preset time threshold.

[0041] Specifically, the timer can be triggered to start timing when the first load detection unit 11 detects that the external load is less than or equal to the first load threshold, and the timer 111 is set to send out the first load signal when the timing time is greater than or equal to the preset time threshold.

[0042] The preset time threshold can be, for example, 15 seconds, 18 seconds, 20 seconds, 22 seconds, 23 seconds, 25 seconds, 28 seconds, 30 seconds, 1 minute, or 2 minutes, and there are no restrictions here.

[0043] That is, the first load detection unit 11 of this application may include a timer, so as to send a first load signal to the low power output circuit 20 and the main output circuit 30 when the impedance value of the external load of the current energy storage power supply 1000 is continuously less than the first load threshold Y and exceeds a preset time t.

[0044] In some embodiments, the load detection module 10 further includes a main control chip 12, which includes a timer. One end of the timer is electrically connected to the first load detection unit 11. The timer is used to start timing after the first load detection unit 11 detects a feedback signal that the external load is less than or equal to a first load threshold. When the timing time is greater than or equal to a preset time threshold, a first load signal is issued.

[0045] Specifically, the preset time threshold can be, for example, 15 seconds, 18 seconds, 20 seconds, 22 seconds, 23 seconds, 25 seconds, 28 seconds, 30 seconds, 1 minute, or 2 minutes, without any restrictions.

[0046] That is, the main control chip 12 of the load detection module 10 of this application can be equipped with a timer to receive the feedback signal detected by the first load detection unit 11 when the external load is less than or equal to the first load threshold and start timing, thereby sending a first load signal to the low power output circuit 20 and the main output circuit 30 when the impedance value of the external load of the current energy storage power supply 1000 is continuously less than the first load threshold Y and exceeds a preset time t.

[0047] Please see Figure 8 In some embodiments, the load detection module 10 further includes a second load detection unit 13. The second load detection unit 13 is connected in series with the low-power output circuit 20, and is used to output a second load signal when an external load is detected to be greater than or equal to a second load threshold.

[0048] Specifically, the second load threshold can be the impedance value of the load. The second load threshold can be equal to or greater than the first load threshold. For example, the second load threshold can also be Y as mentioned above. The second load threshold of the external load corresponds one-to-one with the current threshold corresponding to the current on the low-power output circuit 20.

[0049] The second load detection unit 13 can be a functional module that uses a precision resistor and operational amplifier circuit to detect voltage to detect the load size; or it can be a functional module that uses a Hall current sensor to detect current. The third load detection unit 13 can also be a functional module that uses a precision resistor and operational amplifier circuit to detect voltage and a Hall current sensor to detect current, thereby calculating the power. That is, when the second load detection unit 13 of this application detects that the current on the low-power output circuit 20 is greater than or equal to the second current value, it indicates that the impedance value of the external load of the current energy storage power supply 1000 is continuously greater than the second load threshold Y. Therefore, the second load detection unit 13 can issue a second load signal at this time, thereby controlling the automatic opening of the main output circuit 30 to carry the load and continuously supply power to the load according to the second load signal.

[0050] Please see Figure 9 In some embodiments, the second load detection unit 13 includes a current detector 131 and a control unit 132. The current detector 131 is connected in series with the low-power output circuit 20. The control unit 132 is electrically connected to the current detector 131. The control unit 132 is used to determine the size of the external load based on the current detected by the current detector 131. When the external load is greater than or equal to a second load threshold, the control unit outputs a second load signal; wherein, the larger the current, the smaller the external load, and the smaller the current, the larger the external load.

[0051] Specifically, such as Figure 10 or Figure 11 As shown, the current detector 131 can be a Hall current detector or other instruments capable of detecting current; no limitation is made here. The control unit 132 may include an analog-to-digital converter (ADC) of the microcontroller (MCU) within the energy storage power supply 1000, enabling the analog current signal emitted by the Hall current detector to be accurately read by the ADC, thereby obtaining a digital signal of the current on the branch of the low-power output circuit 20. This allows the magnitude of the current on the branch of the low-power output circuit 20 to reflect the magnitude of the external load.

[0052] That is, the second load detection unit 13 of this application can be equipped with a Hall current detector connected in series with the low power output circuit 20. The Hall current detector can detect the current in the branch of the low power output circuit 20, and thus determine the size of the external load based on the magnitude of the current in the branch.

[0053] Thus, the control circuit 100 of this application can use a current detection method to determine the size of the external load.

[0054] Please see Figure 12 and Figure 13In some embodiments, the control circuit 100 includes a BMS control loop 40. The second load detection unit 13 includes a current detector 131 and a control unit 132. The current detector 131 is connected in series with the BMS control loop 40. The control unit 132 is electrically connected to the current detector 131. The control unit 132 is used to determine the size of the external load based on the current detected by the current detector 131. When the external load is greater than or equal to a second load threshold, it outputs a second load signal. The larger the current, the smaller the external load; the smaller the current, the larger the external load.

[0055] Specifically, the relevant descriptions of the second load threshold, current detector 131, and control unit 132 are as described above and will not be repeated here.

[0056] The BMS control loop 40 can intelligently manage the charging and discharging process to optimize the performance and lifespan of the energy storage power supply 1000. In other words, the BMS control loop 40 is the most indispensable core component inside the energy storage power supply 1000, which directly determines the safety, reliability and service life of the energy storage power supply 1000.

[0057] The second load detection unit 13 of this application can be set on the circuit of the low power output circuit 20 or on the circuit of the BMS control circuit 40. Both methods can realize the detection of whether the external load is greater than or equal to the second load threshold, and the detection method is more flexible.

[0058] In addition to using a current detection method to determine the size of the external load, the control circuit 100 of this application can also use a voltage detection method to determine the size of the external load.

[0059] Please see Figure 14 In some embodiments, the second load detection unit 13 includes a sampling resistor 133, an operational amplifier circuit 134, and a control unit 132. The resistance value of the sampling resistor 133 is a preset resistance value. The operational amplifier circuit 134 is connected to both the sampling resistor 133 and the control unit 132. The operational amplifier circuit 134 amplifies the analog voltage signal output by the sampling resistor 133 and transmits the analog voltage signal to the control unit 132 to obtain the voltage across the sampling resistor 133. The control unit 132 determines the size of the external load based on the voltage across the sampling resistor 133. When the external load is greater than or equal to a second load threshold, it outputs a second load signal; wherein, the larger the voltage, the larger the external load, and the smaller the voltage, the smaller the external load.

[0060] Specifically, the sampling resistor 133 can be as follows: Figure 15 or Figure 16 The precision resistor shown has a low resistance value, ranging from 0.01Ω to 0.1Ω.

[0061] That is, the second load detection unit 13 of this application can obtain the analog voltage signal across the main output circuit 30 through a precision resistor with a known resistance value, and the operational amplifier circuit 134 can amplify the analog voltage signal.

[0062] The control unit 132 may include an analog-to-digital converter (ADC) of the microcontroller (MCU) within the energy storage power supply 1000, so that the analog voltage signal can be accurately read by the analog-to-digital converter (ADC) of the microcontroller (MCU) within the energy storage power supply 1000, thereby obtaining the digital signal of the voltage across the main output circuit 30, so as to reflect the size of the external load based on the voltage across the external load.

[0063] Thus, the control circuit 100 of the energy storage power supply 100 of this application can detect the voltage across the sampling resistor 133 through the second load detection unit 13, that is, determine the size of the external load by using the voltage detection method.

[0064] In addition, the control circuit 100 of this application can determine the size of the external load not only by using current detection method and voltage detection method, but also by using power detection method.

[0065] Please refer to the following: Figure 2 , Figure 8 and Figure 17 In some embodiments, the control circuit 100 further includes a BMS control loop 40. The second load detection unit 13 includes a sampling resistor 133, an operational amplifier circuit 134, a current detector 131, and a control unit 132. The current detector 131 is connected in series with the BMS control loop 40 or the low-power output loop 20. The resistance value of the sampling resistor 133 is a preset resistance value. The operational amplifier circuit 134 is connected to both the sampling resistor 133 and the control unit 132. The operational amplifier circuit 134 amplifies the analog voltage signal output by the sampling resistor 133 and transmits the analog voltage signal to the control unit 132 to obtain the voltage across the sampling resistor 133. One end of the current detector 131 is connected in series with the sampling resistor 133, and the other end of the current detector 131 is connected to the control unit 132.

[0066] Control unit 132 is used to determine the size of the external load based on the voltage across sampling resistor 133. Control unit 132 is electrically connected to current detector 131 and is used to receive the current detected by current detector 131. Control unit 132 is used to calculate the power of the external load based on the current and the voltage across sampling resistor, and outputs a second load signal when the power of the external load is greater than or equal to a second load threshold; wherein, the greater the power, the larger the external load, and the smaller the power, the smaller the external load.

[0067] Specifically, the sampling resistor 133, operational amplifier circuit 134, current detector 131 and control unit 132 are described above and will not be repeated here.

[0068] The sampling resistor is 133. Figure 18 or Figure 19 The precision resistor in the circuit converts the current signal flowing through the external load into a small voltage signal. The operational amplifier circuit 34 is responsible for amplifying and conditioning the weak voltage signal into a robust voltage signal that can be read by the MCU.

[0069] The current detector 131 can be a Hall current detector or other types of detectors; no limitation is made here. It should be noted that... Figure 18 or Figure 19 The voltage detection circuit in the ADC refers to the measurement circuit that provides the analog voltage signal to the ADC.

[0070] That is, the control circuit 100 of this application can also amplify the voltage and current across the sampling resistor 133 by simultaneously setting the sampling resistor 133, the operational amplifier circuit 134, and the current detector 131, thereby amplifying the voltage and current across the sampling resistor 133 according to the formula P=U I, thus the power P of the external load can be calculated, and the size of the external load can be indirectly determined based on the power of the external load.

[0071] The following details the connection relationship between the battery 50, BMS control circuit 40 and output port 60 inside the control circuit 100 and the corresponding control relationship during the charging and discharging process after adding the load detection module 10 and the low-power output circuit 20.

[0072] Please see Figure 20 and Figure 21 In some embodiments, the control circuit 100 further includes a battery 50, a BMS control loop 40, and an output port 60. One end of the BMS control loop 40 is connected to the battery 50, and the other end of the BMS control loop 40 is electrically connected to the main output loop 30 and the low-power output loop 20, respectively. Both the main output loop 30 and the low-power output loop 20 are electrically connected to the output port 60 to supply power to an external load through the output port 60.

[0073] The BMS control circuit 40 includes a pre-charge switch 41 and a charge / discharge switch 42 connected in parallel. The BMS control circuit 40 is used to open the pre-charge switch 41 and close the charge / discharge switch 42 according to the first notification command issued by the main output circuit 30 after receiving the first load signal, so that the battery 50 in the energy storage power supply 1000 supplies power to the external load through the pre-charge circuit formed by the pre-charge switch 41 and the low-power output circuit 20.

[0074] The BMS control circuit 40 is also used to open the charge / discharge switch 42 and close the pre-charge switch 41 according to the second notification command issued by the main output circuit 30 after receiving the second load signal, so that the battery 50 in the energy storage power supply 1000 supplies power to the external load through the charge / discharge circuit formed by the charge / discharge switch 42 and the main output circuit 30.

[0075] Specifically, such as Figure 20 or Figure 21 As shown, the BMS control loop 40 includes a first loop 43, a second loop 44, and a controller 45. The first loop 41 and the second loop 42 are connected in parallel, and the controller 43 is connected to both the first loop 43 and the second loop 44. A pre-charge switch 41 is located on the first loop 43, and a charge / discharge switch 42 is located on the second loop 44.

[0076] That is, the controller 45 of this application can, according to the first notification command issued after the main output circuit 30 receives the first load signal, open the pre-charge switch 41 on the first circuit 43 and close the charge / discharge switch 42 on the second circuit 44, so that the battery 50 in the energy storage power supply 1000 supplies power to the external load through the pre-charge circuit formed by the pre-charge switch 41 and the low-power output circuit 20. The pre-charge switch 41 is... Figure 20 or Figure 21 The pre-charge MOS in the middle, the charge / discharge switch 42 is Figure 20 or Figure 21 The charging and discharging MOS in the middle.

[0077] The controller 45 of this application can also open the charge / discharge switch 42 on the second circuit 44 and close the pre-charge switch 41 on the first circuit 43 according to the second notification command issued after the main output circuit 30 receives the second load signal, so that the battery 50 in the energy storage power supply 1000 supplies power to the external load through the charge / discharge circuit formed by the charge / discharge switch 42 and the main output circuit 30.

[0078] Please see Figure 22In some embodiments, the BMS control loop 40 further includes a first drive circuit 46 and a second drive circuit 47. The first drive circuit 46 is used to drive the pre-charge switch 41 to turn on, and the second drive circuit 47 is used to drive the charge / discharge switch 42 to turn on, wherein the power consumption of the first drive circuit 46 is greater than the power consumption of the second drive circuit 47.

[0079] That is, the BMS control circuit 40 of this application can supply power to an external load with a small load through a pre-charge circuit, and the pre-charge switch 41 only needs to be driven to turn on by the I / O signal d or the first drive circuit 46 with a small drive capability.

[0080] Please see Figure 23 In some embodiments, the load detection module 10 includes a second load detection unit 13, which is connected in series with the low-power output circuit 20 and electrically connected to the main output circuit 30 and the second drive circuit 47. The second load detection unit 13 is used to detect the size of the external load in real time after the battery 50 in the energy storage power supply 1000 supplies power to the external load through the pre-charge circuit formed by the pre-charge switch 41 and the low-power output circuit 20. When the detected external load is greater than or equal to a second load threshold, it sends a second load signal to the main output circuit 30 and the second drive circuit 47, causing the main output circuit 30 to start working according to the second load signal, and the second drive circuit 47 to control the opening of the charge / discharge switch 42 according to the second load signal.

[0081] Specifically, the second load detection unit 13 is connected in series with the low-power output circuit 20, meaning that the second load detection unit 13 of this application can be set on the output circuit of the energy storage power supply 1000, and the second load detection unit 13 is part of the output circuit of the energy storage power supply 1000.

[0082] When the second load detection unit 13 detects that the external load is greater than or equal to the second load threshold, the second load detection unit 13 can send a second load signal to the second drive circuit 47 in the main output circuit 30 and the BMS control circuit 40, thereby realizing intelligent control of the charge and discharge switch 42 and the main output circuit 30.

[0083] Please see Figure 21In some embodiments, the BMS control circuit 40 further includes a pre-charge resistor 48. The second load detection unit 13 is connected in series with the pre-charge switch 41 and the pre-charge resistor 48, and is also electrically connected to the main output circuit 30 and the charge / discharge switch 42. The second load detection unit 13 is also used to detect the size of the external load in real time after the battery 50 in the energy storage power supply 1000 supplies power to the external load through the pre-charge circuit composed of the pre-charge switch 41 and the low-power output circuit 20, and when the detected external load is greater than or equal to the second load threshold, to send a second load signal to the main output circuit 30 and the charge / discharge switch 42 respectively, so that the charge / discharge switch 42 starts working according to the second load signal, and the main output circuit 30 starts working according to the second load signal.

[0084] Specifically, the function of the pre-charge resistor 48 in the BMS control circuit 40 is to limit the current and slowly charge the capacitor in the energy storage power supply 1000, so as to avoid generating a huge surge current at the moment the pre-charge switch 41 is closed, thereby protecting the pre-charge switch 41, the external load and the battery 50 itself.

[0085] The second load detection unit 13 is connected in series with the pre-charge switch 41 and the pre-charge resistor 48. This means that the second load detection unit 13 of this application can also be set on the BMS control loop 40 of the energy storage power supply 1000. The second load detection unit 13 is part of the BMS control loop 40 of the energy storage power supply 1000.

[0086] When the second load detection unit 13 detects that the external load is greater than or equal to the second load threshold, the second load detection unit 13 can send a second load signal to the main output circuit 30 and the charge / discharge switch 42, thereby realizing intelligent control of the main output circuit 30 and intelligent control of the charge / discharge switch 42 directly, which is more efficient.

[0087] This application also provides an energy storage power supply 1000. The energy storage power supply 1000 includes the control circuit 100 described in any of the above embodiments.

[0088] Specifically, the structure and working principle of the control circuit 100 are as described above, and will not be repeated here.

[0089] Thus, the control circuit 100 of the energy storage power supply 100 of this application adds a load detection module 10 and a low-power output circuit 20. The low-power output circuit 20 can start working when it receives the first load signal sent by the load detection module 10, thereby increasing the power supply channels of the energy storage power supply 1000 under no-load or low-load conditions, reducing the power consumption of the energy storage power supply 1000 under no-load or low-load conditions, and improving the battery life.

[0090] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A control circuit for an energy storage power supply, characterized in that, The control circuit includes: a load detection module, a low-power output circuit, and a main output circuit, wherein the load detection module is electrically connected to the low-power output circuit and the main output circuit respectively; The load detection module is used to detect the size of the external load of the energy storage power supply and send a first load signal or a second load signal. The low-power output circuit is used to receive the first load signal and start working according to the first load signal, so as to supply power to the external load of the energy storage power supply through the circuit in which the low-power output circuit is located; the main output circuit is used to receive the first load signal and stop working according to the first load signal. The main output circuit is used to receive the second load signal and start working according to the second load signal, so as to supply power to the external load of the energy storage power supply through the circuit in which the main output circuit is located; the low power output circuit is used to receive the second load signal and stop working according to the second load signal.

2. The control circuit according to claim 1, characterized in that, The load detection module includes a first load detection unit, and the main output circuit includes a first number of switching devices and the first load detection unit. The first load detection unit is connected in series with the switching devices. The first load detection unit is used to detect the current magnitude on the main output circuit to detect the external load magnitude of the energy storage power supply and to send out the first load signal. The low-power output circuit includes a second number of switching devices, the first number being greater than the second number.

3. The control circuit according to claim 2, characterized in that, The first load detection unit is further configured to issue the first load signal when it detects that the external load is less than or equal to the first load threshold for a preset time.

4. The control circuit according to claim 3, characterized in that, The first load detection unit further includes a timer, which is used to start timing when the external load is detected to be less than or equal to a first load threshold, and to issue the first load signal when the timing time is greater than or equal to a preset time threshold.

5. The control circuit according to claim 3, characterized in that, The load detection module further includes a main control chip, which includes a timer, one end of which is electrically connected to the first load detection unit. The timer is used to start timing after the first load detection unit detects a feedback signal that the external load is less than or equal to a first load threshold, and to issue the first load signal when the timing time is greater than or equal to a preset time threshold.

6. The control circuit according to claim 1, characterized in that, The load detection module further includes a second load detection unit, which is connected in series with the low-power output circuit. The second load detection unit is used to output the second load signal when the external load is detected to be greater than or equal to the second load threshold.

7. The control circuit according to claim 6, characterized in that, The second load detection unit includes a current detector and a control unit, wherein the current detector is connected in series with the low-power output circuit; The control unit is electrically connected to the current detector. The control unit is used to determine the size of the external load based on the current detected by the current detector. When the external load is greater than or equal to the second load threshold, the control unit outputs the second load signal. The larger the current, the smaller the external load, and the smaller the current, the larger the external load.

8. The control circuit according to claim 6, characterized in that, The control circuit includes a BMS control loop, and the second load detection unit includes a current detector and a control unit, wherein the current detector is connected in series with the BMS control loop. The control unit is electrically connected to the current detector. The control unit is used to determine the size of the external load based on the current detected by the current detector. When the external load is greater than or equal to the second load threshold, the control unit outputs the second load signal. The larger the current, the smaller the external load, and the smaller the current, the larger the external load.

9. The control circuit according to claim 6, characterized in that, The second load detection unit includes a sampling resistor, an operational amplifier circuit, and a control unit. The resistance value of the sampling resistor is a preset resistance value. The operational amplifier circuit is connected to the sampling resistor and the control unit respectively. The operational amplifier circuit is used to amplify the analog voltage signal output by the sampling resistor and transmit the analog voltage signal to the control unit to obtain the voltage across the sampling resistor. The control unit is used to determine the size of the external load based on the voltage across the sampling resistor, and outputs the second load signal when the external load is greater than or equal to the second load threshold; wherein, the larger the voltage, the larger the external load, and the smaller the voltage, the smaller the external load.

10. The control circuit according to claim 6, characterized in that, The control circuit further includes a BMS control loop. The second load detection unit includes a sampling resistor, an operational amplifier circuit, a current detector, and a control unit. The current detector is connected in series with the BMS control loop or the low-power output loop. The resistance value of the sampling resistor is a preset resistance value. The operational amplifier circuit is connected to the sampling resistor and the control unit respectively. The operational amplifier circuit is used to amplify the analog voltage signal output by the sampling resistor and transmit the analog voltage signal to the control unit to obtain the voltage across the sampling resistor. One end of the current detector is connected in series with the sampling resistor, and the other end of the current detector is connected to the control unit. The control unit is used to determine the size of the external load based on the voltage across the sampling resistor; The control unit is electrically connected to the current detector, and the control unit is used to receive the current detected by the current detector. The control unit is used to calculate the power of the external load based on the current and the voltage across the sampling resistor, and output the second load signal when the power of the external load is greater than or equal to the second load threshold; wherein, the greater the power, the greater the external load, and the smaller the power, the smaller the external load.

11. The control circuit according to claim 1, characterized in that, The control circuit also includes a battery, a BMS control loop, and an output port. One end of the BMS control loop is connected to the battery, and the other end of the BMS control loop is electrically connected to the main output loop and the low-power output loop, respectively. Both the main output loop and the low-power output loop are electrically connected to the output port to supply power to the external load through the output port. The BMS control circuit includes a pre-charge switch and a charge / discharge switch connected in parallel. The BMS control circuit is used to open the pre-charge switch and close the charge / discharge switch according to the first notification command issued by the main output circuit after receiving the first load signal, so that the battery in the energy storage power supply supplies power to the external load through the pre-charge circuit formed by the pre-charge switch and the low-power output circuit. The BMS control circuit is also used to open the charge / discharge switch and close the pre-charge switch according to the second notification command issued by the main output circuit after receiving the second load signal, so that the battery in the energy storage power supply supplies power to the external load through the charge / discharge circuit formed by the charge / discharge switch and the main output circuit.

12. The control circuit according to claim 11, characterized in that, The BMS control loop further includes a first driving circuit and a second driving circuit. The first driving circuit is used to drive the pre-charge switch to turn on, and the second driving circuit is used to drive the charge-discharge switch to turn on. The power consumption of the first driving circuit is greater than that of the second driving circuit.

13. The control circuit according to claim 12, characterized in that, The load detection module includes a second load detection unit, which is connected in series with the low-power output circuit and electrically connected to the main output circuit and the second drive circuit. The second load detection unit is used to detect the size of the external load in real time after the battery in the energy storage power supply supplies power to the external load through the pre-charge circuit composed of the pre-charge switch and the low-power output circuit. When the external load is detected to be greater than or equal to the second load threshold, the second load signal is sent to the main output circuit and the second drive circuit, so that the main output circuit starts working according to the second load signal, and the second drive circuit controls the charging and discharging switch to be turned on according to the second load signal.

14. The control circuit according to claim 11, characterized in that, The BMS control loop further includes a pre-charge resistor, and the load detection module includes a second load detection unit. The second load detection unit is connected in series with the pre-charge switch and the pre-charge resistor, and the second load detection unit is electrically connected with the main output circuit and the charge / discharge switch. The second load detection unit is also used to detect the size of the external load in real time after the battery in the energy storage power supply supplies power to the external load through the pre-charge circuit composed of the pre-charge switch and the low-power output circuit, and when the external load is detected to be greater than or equal to the second load threshold, send the second load signal to the main output circuit and the charge / discharge switch respectively, so that the charge / discharge switch starts working according to the second load signal, and the main output circuit starts working according to the second load signal.

15. An energy storage power source, characterized in that, The energy storage power supply includes the control circuit described in any one of claims 1 to 14.

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