Current control circuit, charging device, energy storage device and charging system

Abstract

The utility model relates to a current control circuit, a charging device, an energy storage device and a charging system. The current control circuit comprises a first port module, a detection module, a control module and a power conversion module, the first port module is electrically connected with the detection module, the detection module is electrically connected with the control module, and the control module is electrically connected with the power conversion module; wherein the first port module at least comprises a first connecting end, the second port module at least comprises a second connecting end, and under the condition that the first port module is electrically connected with the second port module, the first connecting end, the second connecting end and the detection module form a detection loop. The control module can receive and respond to the first control signal output by the detection module to determine the first charging current value, so that the power conversion module outputs the current corresponding to the first charging current value to the battery module, thereby ensuring that the energy storage device can work in the optimal working state, and further improving the charging efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronics, and in particular to a current control circuit, a charging device, an energy storage device and a charging system. BACKGROUND

[0002] When charging the energy storage device by using the vehicle charging device (such as automobile lighter, etc.), the energy storage device usually needs to limit the charging current in a small range to prevent the fuse on the vehicle from being burnt out. However, in this way, once the vehicle charging device is replaced by other charging devices (such as solar panels, etc.), the small charging current will make these charging devices unable to achieve maximum power output, thereby causing the problem of low charging efficiency. SUMMARY

[0003] The present application provides a current control circuit, a charging device, an energy storage device and a charging system to solve the problem of low charging efficiency caused by the small charging current of the solar panel and other charging devices in the related art.

[0004] In a first aspect, an embodiment of the present application provides a current control circuit applied to an energy storage device, wherein the energy storage device at least includes the current control circuit and a battery module, and the current control circuit includes a first port module, a detection module, a control module and a power conversion module; the first port module is electrically connected with the detection module, the detection module is electrically connected with the control module, the control module is electrically connected with the power conversion module, an input end of the power conversion module is electrically connected with the first port module, and an output end of the power conversion module is used to connect the battery module.

[0005] The first port module is used to connect the second port module of the external charging device for charging, the first port module at least includes a first connection end, the second port module at least includes a second connection end, and in the case that the first port module is electrically connected with the second port module, the first connection end, the second connection end and the detection module form a detection loop, so that the detection module outputs a preset first control signal to the control module, and the control module receives and responds to the first control signal to determine a first charging current value, so that the power conversion module outputs a current corresponding to the first charging current value to the battery module.

[0006] Optionally, the first port module is further configured to connect with a third port module of an external charging device for charging, the third port module not comprising the second connection end, and the first port module is configured to, in the case of electrical connection with the third port module, leave the first connection end in a suspended state, so that the detection module outputs a preset second control signal to the control module, and the control module receives and responds to the second control signal to determine a second charging current value, so that the power conversion module outputs a current corresponding to the second charging current value to the battery module.

[0007] Optionally, the second connection end is a ground end, and the detection module comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a first transistor, and a second transistor.

[0008] The first end of the first resistor is electrically connected to the first connection end, the second end of the first resistor is electrically connected to the first end of the second resistor and the base of the first transistor respectively, and the second end of the second resistor and the emitter of the first transistor are electrically connected to a first voltage source.

[0009] The first end of the third resistor is electrically connected to the collector of the first transistor, the second end of the third resistor is electrically connected to the first end of the fourth resistor and the base of the second transistor respectively, the second end of the fourth resistor and the emitter of the second transistor are electrically connected to a ground end, and the collector of the second transistor is electrically connected to a second voltage source and the control module respectively.

[0010] Optionally, the detection module further comprises a first diode, a second diode, a third diode, and a fourth diode.

[0011] The anode of the first diode is electrically connected to the first voltage source, and the cathode of the first diode is electrically connected to the second end of the second resistor and the emitter of the first transistor respectively.

[0012] The anode of the second diode is electrically connected to the first end of the first resistor, and the cathode of the second diode is electrically connected to the first connection end.

[0013] The anode of the third diode and the cathode of the fourth diode are electrically connected to the collector of the second transistor, the cathode of the third diode is electrically connected to the second voltage source, and the anode of the fourth diode is electrically connected to the emitter of the second transistor.

[0014] Optionally, the detection module further comprises a fifth resistor, a fifth diode, and a first capacitor.

[0015] The first end of the fifth resistor is electrically connected with the first connecting end, and the second end of the fifth resistor is electrically connected with a ground end.

[0016] The negative electrode of the fifth diode is electrically connected with the first connecting end, and the positive electrode of the fifth diode is electrically connected with a ground end.

[0017] The first end of the first capacitor is electrically connected with the first end of the first resistor, and the second end of the first capacitor is electrically connected with a ground end.

[0018] Optionally, the detection module further comprises a sixth resistor and a seventh resistor.

[0019] The first end of the sixth resistor and the first end of the seventh resistor are both electrically connected with the collector of the second triode, the second end of the sixth resistor is electrically connected with the second voltage source, and the second end of the seventh resistor is electrically connected with the control module.

[0020] Optionally, the detection module comprises an eighth resistor, a ninth resistor and a field effect tube.

[0021] The first end of the eighth resistor is electrically connected with the first connecting end, the second end of the eighth resistor is electrically connected with the first end of the ninth resistor and the gate of the field effect tube respectively, the second end of the ninth resistor and the drain of the field effect tube are both electrically connected with a third voltage source, and the source of the field effect tube is electrically connected with a ground end.

[0022] In a second aspect, the embodiments of the present application further provide a charging device, which comprises a device body and a second port module, the device body is provided with the second port module, the device body is used for converting solar energy into electric energy and outputting by the second port module, and the second port module at least comprises a second connecting end.

[0023] The second port module is used for being electrically connected with the first port module in the current control circuit of any one of the first aspect, and the first port module at least comprises a first connecting end.

[0024] When the first port module is electrically connected with the second port module, the first connecting end, the second connecting end and the detection module in the current control circuit form a detection loop.

[0025] In a third aspect, the embodiments of the present application further provide an energy storage device, which comprises a battery module and the current control circuit of any one of the first aspect.

[0026] The power conversion module of the current control circuit is electrically connected with the battery module.

[0027] In a fourth aspect, the embodiments of the present application further provide a charging system, the charging system comprising the charging device of the second aspect and the energy storage device of the third aspect;

[0028] The charging device is electrically connected with the energy storage device through the second port module and the first port module.

[0029] The current control circuit comprises a first port module, a detection module, a control module and a power conversion module. The first port module is electrically connected with the detection module, the detection module is electrically connected with the control module, the control module is electrically connected with the power conversion module, an input end of the power conversion module is electrically connected with the first port module, and an output end of the power conversion module is used for connecting a battery module. The first port module is used for connecting a second port module of an external charging device for charging. The first port module comprises at least a first connecting end, and the second port module comprises at least a second connecting end. When the first port module is electrically connected with the second port module, the first connecting end, the second connecting end and the detection module form a detection loop, so that the detection module outputs a preset first control signal to the control module, and the control module receives and responds to the first control signal to determine a first charging current value, so that the power conversion module outputs a current corresponding to the first charging current value to the battery module. In this way, when the first port module is electrically connected with the second port module, the first connecting end in the first port module, the second connecting end in the second port module and the detection module form a detection loop. At this time, the detection module can detect a level signal of the first connecting end according to the detection loop and output a first control signal to the control module. Therefore, the control module can determine the type of the charging device and the charging current supported by the type, i.e. the first charging current value, according to the first control signal, and control the power conversion module to charge according to the first charging current value. In this way, the current control circuit can make the solar panel and other charging devices output a current according to the first charging current value, so as to ensure that the energy storage device can work in an optimal working state, thereby improving the charging efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0030] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments consistent with the present application and, together with the description, further serve to explain the principles of the application.

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced as follows. Obviously, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without any creative effort.

[0032] Figure 1 A structural schematic diagram of a current control circuit provided by an embodiment of the present application;

[0033] Figure 2 A structural schematic diagram of another current control circuit provided by an embodiment of the present application;

[0034] Figure 3 A circuit diagram of a detection module provided by an embodiment of the present application;

[0035] Figure 4 A circuit diagram of another detection module provided by an embodiment of the present application;

[0036] Figure 5 A circuit diagram of still another detection module provided by an embodiment of the present application;

[0037] Figure 6 A structural schematic diagram of still another current control circuit provided by an embodiment of the present application;

[0038] Figure 7 A circuit diagram of a current sampling module provided by an embodiment of the present application;

[0039] Figure 8 A circuit diagram of a voltage sampling module provided by an embodiment of the present application;

[0040] Figure 9 A structural schematic diagram of a charging device provided by an embodiment of the present application;

[0041] Figure 10 A structural schematic diagram of an energy storage device provided by an embodiment of the present application;

[0042] Figure 11 A structural schematic diagram of a charging system provided by an embodiment of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0044] 100, Current control circuit; 110, First port module; 120, Detection module; 130, Control module; 140, Power conversion module; 200, Charging device; 210, Second port module; 220, Third port module; 230, Device body; 150, Sampling resistor; 160, Current sampling module; 170, Voltage sampling module; 300, Energy storage device; 310, Battery module; 400, Charging system; R1, First resistor; R2, Second resistor; R3, Third resistor; R4, Fourth resistor; Q1, First transistor; Q2, Second transistor; D1, First diode; D2, Second diode; D3, Third diode; D4, Fourth diode; R5, Fifth resistor; D5, Fifth diode; C1, First capacitor; R6, Sixth resistor; R7, Seventh resistor; R8, Eighth resistor; R9, Ninth resistor; Q3, Field-effect transistor. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0046] See Figure 1 , Figure 1 This is a schematic diagram of a current control circuit provided in an embodiment of this application. Figure 1 As shown, the current control circuit 100 is applied in an energy storage device (not shown in the figure). The energy storage device includes at least the current control circuit 100 and a battery module (not shown in the figure). The current control circuit 100 includes: a first port module 110, a detection module 120, a control module 130, and a power conversion module 140. The first port module 110 is electrically connected to the detection module 120, the detection module 120 is electrically connected to the control module 130, the control module 130 is electrically connected to the power conversion module 140, the input terminal of the power conversion module 140 is electrically connected to the first port module 110, and the output terminal of the power conversion module 140 is used to connect to the battery module.

[0047] The first port module 110 is configured to be connected with the second port module 210 of the external charging device 200 for charging. The first port module 110 includes at least a first connecting end, and the second port module 210 includes at least a second connecting end. When the first port module 110 is electrically connected with the second port module 210, the first connecting end, the second connecting end and the detection module 120 form a detection loop, so that the detection module 120 outputs a preset first control signal to the control module 130, and the control module 130 receives and responds to the first control signal to determine a first charging current value, so that the power conversion module 140 outputs a current corresponding to the first charging current value to the battery module.

[0048] Specifically, the first port module 110 includes a first connecting end, a position of the first connecting end on the first port module 110 is matched with a position of a second connecting end on the second port module 210, so that the first connecting end can be connected with the second connecting end when the first port module 110 is electrically connected with the second port module 210, and forms a detection loop together with the detection module 120 after being connected. In addition, the first port module 110 can further include a third connecting end and a fourth connecting end, and the second port module 210 further includes a fifth connecting end and a sixth connecting end. The position of the third connecting end on the first port module 110 is matched with the position of the fifth connecting end on the second port module 210, and the position of the fourth connecting end on the first port module 110 is matched with the position of the sixth connecting end on the second port module 210, so that the third connecting end can be connected with the fifth connecting end and the fourth connecting end can be connected with the sixth connecting end when the first port module 110 is electrically connected with the second port module 210. Since the fifth connecting end and the sixth connecting end in the second port module 210 are respectively connected with two poles of the charging power supply in the charging device 200, the first port module 110 can introduce the charging power supply from the charging device 200 by the above-mentioned manner, and forms a charging circuit together with the power conversion module 140 after introducing the charging power supply. That is, the input end of the power conversion module 140 can be electrically connected with the third connecting end and the fourth connecting end in the first port module 110 to introduce the charging power supply from the charging device 200. The output end of the power conversion module 140 can be connected with the battery module to control the output power of the charging power supply to charge the battery module. It should be noted that the battery module here can be a battery PACK, or a battery module with an inverter, which is not limited in the embodiment of the present application. The second connecting end in the second interface module here can be short-circuited with the fifth connecting end, or short-circuited with the sixth connecting end, or connected with other preset level signals, which is not limited in the present application. The power conversion module 140 here can be a DCDC circuit, or a BUCK circuit, a BOOST circuit or a BUCK-BOOST circuit, which is not limited in the present application.

[0049] The detection module 120 can detect the level signal of the first connection end in the first port module 110, and output a first control signal to the control module 130 according to the level signal of the first connection end. In the control module 130, the charging current value corresponding to each type of charging device can be pre-configured, for example, a smaller charging current value (such as 10A or so) can be configured for a vehicle-mounted charging device, and a larger charging current value (such as 20A or so) can be configured for a solar panel. In this way, when the first connection end in the first port module 110 is connected to the second connection end in the second port module 210, the control module 130 can determine the type of the charging device 200 and the charging current supported by the type according to the first control signal output by the detection module 120, and control the power conversion module 140 to charge according to the charging current value. It should be noted that the control module 130 can be a specific control chip and peripheral circuit, or a comparator combined circuit, as long as it can output a signal carrying the first charging current value according to the preset first control signal. Those skilled in the art can design the circuit according to the above function, which will not be described here.

[0050] In this way, when the control module 130 determines that the type of the charging device 200 is a solar panel, the solar panel can output current according to the first charging current value, so that the solar panel works in the best power output state, thereby improving the charging efficiency.

[0051] Referring to Figure 2 , Figure 2 Another current control circuit provided by the embodiment of the present application is shown in the structural schematic diagram. As shown in Figure 2 The first port module is also used for connecting with the third port module of the external charging device for charging. The third port module does not include the second connection end. When the first port module is electrically connected with the third port module, the first connection end is in a suspended state, so that the detection module outputs a preset second control signal to the control module, and the control module receives and responds to the second control signal to determine a second charging current value, so that the power conversion module outputs a current corresponding to the second charging current value to the battery module.

[0052] Specifically, the port module of the charging device 200 can further include a third port module 220 in addition to the second port module 210, and the difference between the second port module 210 and the third port module 220 is that the third port module 220 includes a fifth connecting end adapted to the third connecting end and a sixth connecting end adapted to the fourth connecting end, but does not include the second connecting end adapted to the first connecting end. Since the third port module 220 does not include the second connecting end, when the third port module 220 is electrically connected to the first port module 110, the first connecting end in the first port module 110 is in a suspended state, and at this time the detection module outputs a second control signal. The second control signal and the first control signal are two different control signals. For example, when the first control signal is a high-level signal, the second control signal is a low-level signal; when the first control signal is a low-level signal, the second control signal is a high-level signal, which is not limited in the embodiment of the present application.

[0053] In this way, when the port module of the charging device 200 is the second port module 210, the detection module 120 outputs the first control signal, and the control module 130 can determine that the first charging current value supported by the charging device 200 is I1, and control the power conversion module 140 to charge according to the current I1. When the port module of the charging device 200 is the third port module 220, the detection module 120 outputs the second control signal, and the control module 130 can determine that the second charging current value supported by the charging device 200 is I2, and control the power conversion module 140 to charge according to the current I2. For example, when charging the power supply device 300 through the car charger and using the car lighter, the charging current value can be controlled to a small current value (such as about 10A, etc.), which can effectively prevent the fuse on the car from being burned out due to excessive current. When charging the power supply device 300 by using a solar panel, the charging current value can be controlled to a large current value (such as about 20A, etc.), without the need to limit the charging current value to a small current value, so that the solar panel can work in the best power output state, thereby improving the charging power and charging speed of the energy storage device.

[0054] In an optional embodiment, referring to Figure 3 , the second connecting end is a ground end, and the detection module 120 includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a first triode Q1, and a second triode Q2;

[0055] The first end of the first resistor R1 is electrically connected to the first connecting end, the second end of the first resistor R1 is electrically connected to the first end of the second resistor R2 and the base of the first triode Q1, and the second end of the second resistor R2 and the emitter of the first triode Q1 are electrically connected to the first voltage source;

[0056] The first end of the third resistor R3 is electrically connected with the collector of the first transistor Q1, the second end of the third resistor R3 is electrically connected with the first end of the fourth resistor R4 and the base of the second transistor Q2 respectively, the second end of the fourth resistor R4 and the emitter of the second transistor Q2 are electrically connected with the ground terminal respectively, and the collector of the second transistor Q2 is electrically connected with the second voltage source and the control module 130 respectively.

[0057] Specifically, the first resistor R1 and the second resistor R2 can be used to divide the first voltage source, and the working state of the first transistor Q1 is controlled by the voltage after the voltage division, that is, the base voltage of the first transistor Q1. The third resistor R3 and the fourth resistor R4 can be used to divide the collector voltage of the first transistor Q1, and the working state of the second transistor Q2 is controlled by the voltage after the voltage division, that is, the base voltage of the second transistor Q2.

[0058] In this embodiment, the second connection terminal is short-circuited with the sixth connection terminal and connected with the ground terminal, so that when the first port module 110 is electrically connected with the second port module 210, the first connection terminal in the first port module 110 and the second connection terminal in the second port module 210 are in communication and are in a low level state. At this time, the base voltage of the first transistor Q1 can be obtained by dividing the first voltage source through the first resistor R1 and the second resistor R2, the first transistor Q1 is in a conducting state, the collector voltage of the first transistor Q1 is equal to the emitter voltage, and the third resistor R3 and the fourth resistor R4 are used to divide the collector voltage of the first transistor Q1, so that the second transistor Q2 is also in a conducting state, and the collector of the second transistor Q2 is in a low level. At this time, the detection module 120 can send a first control signal (low level signal) to the control module 130. When the first port module 110 is electrically connected with the third port module 220, the first connection terminal in the first port module 110 is in a floating state. At this time, the voltage difference between the base and the emitter of the first transistor Q1 is less than 0.7V, which does not reach the conducting voltage, the first transistor Q1 is in a cut-off state, the collector of the first transistor Q1 has no voltage, and the second transistor Q2 is also in a cut-off state, and the collector of the second transistor Q2 is in a high level. At this time, the detection module 120 can send a second control signal (high level signal) to the control module 130.

[0059] In the above manner, the level signal of the first connection terminal in the first port module 110 can be detected by using the detection circuit to output different control signals, so that the subsequent control module 130 can identify the type of the charging device 200 based on different control signals.

[0060] In an optional embodiment, referring to Figure 4 , the detection module 120 further comprises a first diode D1, a second diode D2, a third diode D3 and a fourth diode D4.

[0061] The positive electrode of the first diode D1 is electrically connected with the first voltage source, and the negative electrode of the first diode D1 is electrically connected with the second end of the second resistor R2 and the emitter of the first transistor Q1 respectively;

[0062] The positive electrode of the second diode D2 is electrically connected with the first end of the first resistor R1, and the negative electrode of the second diode D2 is electrically connected with the first connection end;

[0063] The positive electrode of the third diode D3 and the negative electrode of the fourth diode D4 are both electrically connected with the collector of the second transistor Q2, the negative electrode of the third diode D3 is electrically connected with the second voltage source, and the positive electrode of the fourth diode D4 is electrically connected with the emitter of the second transistor Q2.

[0064] Specifically, the first diode D1 and the second diode D2 have unidirectional conduction performance, and the current direction is from the positive electrode to the negative electrode when conducting. Therefore, by connecting the first diode D1 in series between the first voltage source and the second resistor R2, and connecting the second diode D2 in series between the first resistor R1 and the third port, it can be ensured that the current flows from the first voltage source to the first connection end, and cannot flow from the first connection end to the first voltage source, thereby preventing reverse connection.

[0065] In addition, the third diode D3 and the fourth diode D4 have unidirectional conduction performance, and the current direction is from the positive electrode to the negative electrode when conducting. Therefore, by connecting the third diode D3 in series between the collector of the second transistor Q2 and the second voltage source, so that when the voltage of the collector of the second transistor Q2 is higher than the voltage of the second voltage source, the third diode D3 will conduct, so as to clamp the voltage of the collector of the second transistor Q2 at the voltage of the second voltage source. By connecting the fourth diode D4 in series between the collector of the second transistor Q2 and the emitter of the second transistor Q2, so that when the voltage of the collector of the second transistor Q2 is lower than the voltage of the emitter of the second transistor Q2, the fourth diode D4 will conduct, so as to clamp the voltage of the collector of the second transistor Q2 at the voltage of the emitter of the second transistor Q2. In this way, the peak or valley value of the voltage of the collector of the second transistor Q2 can be clamped within a certain voltage range, so as to avoid damage to the downstream control module 130 due to excessively high or low voltage.

[0066] In an optional embodiment, please continue to refer to Figure 4 The detection module 120 further comprises a fifth resistor R5, a fifth diode D5 and a first capacitor C1;

[0067] The first end of the fifth resistor R5 is electrically connected with the first connection end, and the second end of the fifth resistor R5 is electrically connected with the ground end;

[0068] The negative electrode of the fifth diode D5 is electrically connected with the first connection end, and the positive electrode of the fifth diode D5 is electrically connected with the ground end.

[0069] The first end of the first capacitor C1 is electrically connected with the first end of the first resistor R1, and the second end of the first capacitor C1 is electrically connected with the ground end.

[0070] Specifically, the fifth resistor R5 is arranged in series between the first connection end and the ground end, so as to discharge the static electricity at the first connection end and play a role of electrostatic protection.

[0071] The first capacitor C1 is arranged in series between the first end of the first resistor R1 and the ground end, so as to discharge the static electricity at the first end of the first resistor R1 and play a role of electrostatic protection.

[0072] The fifth diode D5 is arranged in series between the first connection end and the ground end, so as to play a role of anti-reverse connection and avoid damage to other elements in the detection module 120 caused by reverse connection or external high voltage.

[0073] In an optional embodiment, please continue to refer to Figure 4 The detection module 120 further comprises a sixth resistor R6 and a seventh resistor R7.

[0074] The first end of the sixth resistor R6 and the first end of the seventh resistor R7 are both electrically connected with the collector of the second transistor Q2, the second end of the sixth resistor R6 is electrically connected with the second voltage source, and the second end of the seventh resistor R7 is electrically connected with the control module 130.

[0075] Specifically, the sixth resistor R6 is arranged in series between the collector of the second transistor Q2 and the second voltage source, so as to play a role of current limiting and effectively protect the second transistor Q2 from being damaged.

[0076] The seventh resistor R7 is arranged in series between the collector of the second transistor Q2 and the control module 130, so as to also play a role of current limiting and effectively protect the control module 130 from being damaged.

[0077] In an optional embodiment, please refer to Figure 5 The detection module 120 comprises an eighth resistor R8, a ninth resistor R9 and a field effect transistor Q3.

[0078] The first end of the eighth resistor R8 is electrically connected with the first connection end, the second end of the eighth resistor R8 is electrically connected with the first end of the ninth resistor R9 and the gate of the field effect transistor Q3 respectively, the second end of the ninth resistor R9 and the drain of the field effect transistor Q3 are both electrically connected with the third voltage source, and the source of the field effect transistor Q3 is electrically connected with the ground end.

[0079] Specifically, the detection circuit can also be as follows Figure 5As shown, the eighth resistor R8 and the ninth resistor R9 can be used to divide the third voltage source, and the working state of the field effect tube Q3 is controlled by the voltage after voltage division (i.e. the gate voltage of the field effect tube Q3).

[0080] When the first port module 110 is electrically connected with the second port module 210, the first connection end in the first port module 110 is in communication with the second connection end in the second port module 210, and is in a low level state. At this time, the gate voltage of the field effect tube Q3 is obtained by dividing the third voltage source by the eighth resistor R8 and the ninth resistor R9, the field effect tube Q3 is in a cut-off state, and the drain voltage of the field effect tube Q3 is in a high level. At this time, the detection module 120 can send a first control signal (high level signal) to the control module 130. When the first port module 110 is electrically connected with the third port module 220, the first connection end in the first port module 110 is in a suspended state. At this time, the gate voltage of the field effect tube Q3 is equal to the voltage value of the third voltage source, the field effect tube Q3 is in a conductive state, and the drain voltage of the field effect tube Q3 is pulled low. At this time, the detection module 120 can send a second control signal (low level signal) to the control module 130.

[0081] In addition, the detection circuit can further include a diode D6 for anti-reverse connection, a capacitor C2 for anti-static, a capacitor C3 for filtering, a voltage stabilizing tube ZD1 for clamping, and a current limiting resistor R10 for protection.

[0082] In the above manner, the detection circuit can detect the level signal of the first connection end in the first port module 110 to output different control signals, so that the subsequent control module 130 can identify the type of the charging device 200 based on different control signals.

[0083] In an optional embodiment, referring to Figure 6 , the current control circuit 100 further includes a sampling resistor 150, a current sampling module 160, and a voltage sampling module 170.

[0084] The first end of the sampling resistor 150 is connected with the fourth connection end, and the second end of the sampling resistor 150 is connected with the power conversion module 140.

[0085] The first end of the current sampling module 160 is connected with the first end of the sampling resistor 150, the second end of the current sampling module 160 is connected with the second end of the sampling resistor 150, and the third end of the current sampling module 160 is connected with the control module 130.

[0086] The first end of the voltage sampling module 170 is connected to the third connection end, and the second end of the voltage sampling module 170 is connected to the control module 130.

[0087] Specifically, the current sampling module 160 is used to sample the current across the sampling resistor 150 to obtain the actual charging current value of the charging power supply of the charging device 200 in real time. As an optional implementation, the circuit structure of the current sampling module 160 can be as follows: Figure 7 As shown, the current sampling module 160 collects the currents lin+ and lin- flowing through the sampling resistor 150. After differential sampling, the currents are amplified by resistors R11, R13, R12, and R14 and amplifier U1B, and then filtered by resistor R15 and capacitor C8 before being transmitted to the control module 130 for current detection. The control module 130 performs sampling conversion to detect the magnitude of the charging current. If the charging current has not yet reached the set maximum charging current, the control module 130 controls the power conversion module 140 to increase the charging current until it reaches the set maximum charging current. The control module 130 then controls the power conversion module 140 to maintain this current value and not increase it further. Of course, the current sampling module 160 can also be implemented using other circuit structures, which are not specifically limited in this application.

[0088] The voltage sampling module 170 described above is used to sample the voltage at the third connection terminal to obtain the actual charging voltage value of the charging power supply of the charging device 200 in real time. As an optional implementation, the circuit structure of the voltage sampling module 170 can be as follows: Figure 8 As shown, the voltage sampling module 170 detects the magnitude of the charging voltage MPPT_IN by the voltage division value of the resistors. Specifically, the charging voltage MPPT_IN is divided by resistors R16, R17, and R18, then filtered by resistor R19 and capacitors C9 and C10, and finally transmitted to the control module 130 for voltage detection. Of course, the voltage sampling module 170 can also be implemented using other circuit structures, which are not specifically limited in this application. In this way, the control module 130 can determine the type of the charging device 200 and the charging current value supported by that type based on the control information output by the detection module 120. Then, based on the actual charging current value output by the current sampling module 160 and the actual charging voltage value output by the voltage sampling module 170, it adjusts the actual current and voltage of the charging device 200 so that the power conversion module 140 charges at the maximum power point under the charging current allowed by the charging device. This ensures that when using solar panels for charging, the solar panels can work in the optimal power output state, thereby improving charging efficiency; and when using on-board charging devices, the fuses in the car will not be burned.

[0089] In addition, see Figure 9The embodiment of the present application also provides a charging device 200, which comprises a device body 230 and a second port module 210, the second port module 210 is arranged on the device body 230, the device body 230 is used for converting solar energy into electric energy and outputting the electric energy by the second port module 210, and the second port module 210 at least comprises a second connecting end;

[0090] The second port module 210 is used for being electrically connected with the first port module 110 in the current control circuit 100 in the foregoing embodiment, and the first port module 110 at least comprises a first connecting end;

[0091] When the first port module 110 is electrically connected with the second port module 210, the first connecting end, the second connecting end and the detection module 120 in the current control circuit 100 form a detection loop.

[0092] It should be noted that the current control circuit 100 can realize the functions of the current control circuit 100 in any of the foregoing embodiments, and details are not repeated here. The device body 230 can be a device for converting solar energy into electric energy, such as a solar panel. In this way, the charging device 200 can convert solar energy into electric energy, and output the electric energy from the second port module 210 to the energy storage device, so as to realize the charging function of the energy storage device. During the charging process, the current control circuit 100 can detect the charging device 200 and identify that the charging device 200 is a solar panel, so that the solar panel outputs current according to the first charging current value, thereby ensuring that the energy storage device can work in the best working state, and further improving the charging efficiency.

[0093] In addition, referring to Figure 10 The embodiment of the present application also provides an energy storage device 300, which comprises a battery module 310 and a current control circuit 100; wherein the power conversion module 140 of the current control circuit 100 is electrically connected with the battery module 310.

[0094] It should be noted that the current control circuit 100 can realize the functions of the current control circuit 100 in any of the foregoing embodiments, and details are not repeated here.

[0095] In this way, in the energy storage device 300, the current control circuit 100 can be used to identify the type of the charging device 200, and determine the charging current value corresponding to the current charging device 200, so that the current charging device 200 can charge the energy storage device 300 according to the charging current value corresponding to the current charging device 200, thereby ensuring that the solar panel can work in the best power output state when charging by using the solar panel, and further improving the charging efficiency; and the fuse on the car will not be burned out when charging by using the car-mounted charging device. In addition, referring toFigure 11 The embodiment of the present application also provides a charging system 400, which comprises the charging device 200 and the energy storage device 300 in the foregoing embodiment.

[0096] The charging device 200 is electrically connected with the energy storage device 300 through the second port module 210 and the first port module 110.

[0097] It should be noted that the charging device 200 and the energy storage device 300 herein can realize the functions of the charging device 200 and the energy storage device 300 in the foregoing embodiment, and will not be repeated here.

[0098] In this way, in the charging system 400, the energy storage device 300 can be charged by the charging device 200, and in the charging process, the energy storage device 300 can identify the charging device 200, and when the charging device 200 is identified as a solar panel, the solar panel can output current according to the first charging current value, so as to ensure that the energy storage device 300 can work in the best working state, thereby improving the charging efficiency.

[0099] It should be noted that in this document, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action, without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without more limitations, an element preceded by "comprises... " does not, without more limitations, foreclose the existence of additional identical elements in the process, method, article, or apparatus that includes the recited element.

[0100] The above description is only a specific implementation of the present application, which enables those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.​

Claims

1. A current control circuit, characterized by, The current control circuit is applied to an energy storage device, and the energy storage device at least comprises the current control circuit and a battery module, and the current control circuit comprises a first port module, a detection module, a control module and a power conversion module; the first port module is electrically connected with the detection module, the detection module is electrically connected with the control module, the control module is electrically connected with the power conversion module, an input end of the power conversion module is electrically connected with the first port module, and an output end of the power conversion module is used for connecting the battery module; The first port module is used for connecting a second port module of an external charging device to charge, the first port module at least comprises a first connecting end, the second port module at least comprises a second connecting end, and in the case that the first port module is electrically connected with the second port module, the first connecting end, the second connecting end and the detection module form a detection loop, so that the detection module outputs a preset first control signal to the control module, and the control module receives and responds to the first control signal to determine a first charging current value, so that the power conversion module outputs a current corresponding to the first charging current value to the battery module.

2. The current control circuit of claim 1, wherein, The first port module is also used for connecting a third port module of an external charging device to charge, the third port module does not comprise the second connecting end, and in the case that the first port module is electrically connected with the third port module, the first connecting end is in a suspended state, so that the detection module outputs a preset second control signal to the control module, and the control module receives and responds to the second control signal to determine a second charging current value, so that the power conversion module outputs a current corresponding to the second charging current value to the battery module.

3. The current control circuit of claim 1, wherein, The second connecting end is a ground end, and the detection module comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a first triode and a second triode; The first end of the first resistor is electrically connected with the first connecting end, the second end of the first resistor is electrically connected with the first end of the second resistor and the base of the first triode respectively, the second end of the second resistor and the emitter of the first triode are electrically connected with a first voltage source respectively; The first end of the third resistor is electrically connected with the collector of the first triode, the second end of the third resistor is electrically connected with the first end of the fourth resistor and the base of the second triode respectively, the second end of the fourth resistor and the emitter of the second triode are electrically connected with a ground end respectively, and the collector of the second triode is electrically connected with a second voltage source and the control module respectively.

4. The current control circuit of claim 3, wherein, The detection module further comprises a first diode, a second diode, a third diode and a fourth diode; The anode of the first diode is electrically connected with the first voltage source, and the cathode of the first diode is electrically connected with the second end of the second resistor and the emitter of the first triode respectively; The positive electrode of the second diode is electrically connected with the first end of the first resistor, and the negative electrode of the second diode is electrically connected with the first connection end. The positive electrode of the third diode and the negative electrode of the fourth diode are both electrically connected with the collector of the second triode, the negative electrode of the third diode is electrically connected with the second voltage source, and the positive electrode of the fourth diode is electrically connected with the emitter of the second triode.

5. The current control circuit of claim 3, wherein, The detection module further comprises a fifth resistor, a fifth diode and a first capacitor. The first end of the fifth resistor is electrically connected with the first connection end, and the second end of the fifth resistor is electrically connected with the ground end. The negative electrode of the fifth diode is electrically connected with the first connection end, and the positive electrode of the fifth diode is electrically connected with the ground end. The first end of the first capacitor is electrically connected with the first end of the first resistor, and the second end of the first capacitor is electrically connected with the ground end.

6. The current control circuit of claim 3, wherein, The detection module further comprises a sixth resistor and a seventh resistor. The first end of the sixth resistor and the first end of the seventh resistor are both electrically connected with the collector of the second triode, the second end of the sixth resistor is electrically connected with the second voltage source, and the second end of the seventh resistor is electrically connected with the control module.

7. The current control circuit of claim 1, wherein, The detection module comprises an eighth resistor, a ninth resistor and a field effect tube. The first end of the eighth resistor is electrically connected with the first connection end, the second end of the eighth resistor is respectively electrically connected with the first end of the ninth resistor and the gate of the field effect tube, the second end of the ninth resistor and the drain of the field effect tube are both electrically connected with the third voltage source, and the source of the field effect tube is electrically connected with the ground end.

8. A charging device, characterized by The charging device comprises a device body and a second port module, the second port module is arranged on the device body, the device body is used for converting solar energy into electric energy and outputting by the second port module, and the second port module at least comprises a second connection end. The second port module is used for being electrically connected with the first port module in the current control circuit of any one of claims 1-7, and the first port module at least comprises a first connection end. In the case that the first port module is electrically connected with the second port module, the first connection end, the second connection end and the detection module in the current control circuit form a detection loop.

9. An energy storage device, characterized by, The energy storage device comprises a battery module and the current control circuit of any one of claims 1-7. The power conversion module of the current control circuit is electrically connected with the battery module.

10. A charging system, characterized by The charging system comprises the charging device of claim 8 and the energy storage device of claim 9. The charging device is electrically connected with the energy storage device through the second port module and the first port module.

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