Emergency power supply intelligent judgment of external clamp short circuit circuit and work flow

Abstract

The present invention discloses an emergency power intelligent judgment external clamp short circuit circuit, the output switching module is electrically connected between the external output clamp P+ and the positive pole of the emergency power supply, the main circuit MOS module is electrically connected between the external output clamp P‑ and the negative pole of the emergency power supply; the output end of the first MOS switch module is electrically connected to the input end of the power current limiting module, the first MOS switch module, the power current limiting module and the output switching module are connected in parallel; the output end of the second MOS switch module is electrically connected to the input end of the external voltage detection module, the second MOS switch module is connected to the input end of the diode D1; the input end of the power module is connected to the positive pole of the emergency power supply, the input end of the MCU main control is connected to the output end of the power module, and the output end of the MCU main control is respectively connected to the first MOS switch module, the second MOS switch module, the external voltage detection module, and the main circuit MOS module. The present invention has the advantages of detecting whether a short circuit occurs before outputting current to a battery pack and intelligently controlling the output required voltage.

Description

Technical Field

[0001] The invention relates to a vehicle emergency power supply system, in particular to an emergency power supply intelligently judging an external clamp short-circuit circuit and a working process. Background Art

[0002] When the on-board battery pack of a car is out of power, an emergency power supply is needed to jump-charge the on-board battery pack. The existing 12 / 24V emergency power supplies on the market all use a manual switch to activate the emergency power supply system, and then use the emergency power supply output clamp to connect to the on-board battery. When jumping power, the output clamp short-circuit protection adopts hardware short-circuit protection, that is, the output is disconnected when there is a large current short circuit.

[0003] However, when connecting the power, the 12 / 24V emergency power supply currently on the market does not have intelligent judgment on the short circuit of the output external clamp. The output clamp short circuit protection is mainly handled by hardware short circuit protection. When there is a large current short circuit, the output is disconnected. However, when the clamp is connected or the power is turned on, sparks or arcs may occur due to the large current short circuit, which may easily burn the clamp and damage the battery life. Without short circuit protection, the emergency power supply may be damaged or the clamp may easily burn and damage the battery life. Summary of the invention

[0004] The purpose of the present invention is to provide an emergency power supply that can intelligently determine an external clamp short-circuit circuit and work flow, which has the advantages of detecting whether a short circuit occurs before outputting current to a battery pack and intelligently controlling the output required voltage.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions:

[0006] The emergency power supply intelligently determines the short circuit of the external clamp, including the emergency power supply, the power module, the output switching module, the MCU main control, the external output clamp P+, the external output clamp P-, the external voltage detection module, the first MOS switch module, the second MOS switch module, the power current limiting module, and the main circuit MOS module;

[0007] The external output clamp P+ is connected to the positive pole of the emergency power supply, the external output clamp P- is connected to the negative pole of the emergency power supply, the output switching module is electrically connected between the external output clamp P+ and the positive pole of the emergency power supply, and the main circuit MOS module is electrically connected between the external output clamp P- and the negative pole of the emergency power supply;

[0008] The output end of the first MOS switch module is electrically connected to the input end of the power current limiting module, the first MOS switch module, the power current limiting module and the output switching module are connected in parallel, the input end of the first MOS switch module is located between the emergency power supply and the output switching module, and a diode D1 is provided at the connection between the first MOS switch module and the positive electrode of the emergency power supply;

[0009] The output end of the second MOS switch module is electrically connected to the input end of the external voltage detection module, the second MOS switch module is connected to the input end of the diode D1, a diode D2 is provided at the input end of the second MOS switch module, and the output end of the external voltage detection module is located between the output end of the power current limiting module and the external output clamp P+;

[0010] The input end of the power module is connected to the positive electrode of the emergency power supply, and the input end of the power module is located between the input end of the first MOS switch module and the positive electrode of the emergency power supply. The input end of the MCU main control is connected to the output end of the power module, and the output end of the MCU main control is respectively connected to the first MOS switch module, the second MOS switch module, the external voltage detection module, and the main loop MOS module.

[0011] The preferred solutions are as follows:

[0012] Preferably: it also includes an automatic isolation wake-up circuit, the input end of the automatic isolation wake-up circuit is connected to the external output clamp P+, the first output end of the automatic isolation wake-up circuit is connected to the external output clamp P-, and the second output end of the automatic isolation wake-up circuit is connected to the power module.

[0013] The workflow of the emergency power supply intelligently judging the short circuit of the external clamp includes the following steps:

[0014] Step 1: When the emergency power supply is turned off, the vehicle battery pack needs to be charged;

[0015] Step 2: The external output clamps P+ and P- of the emergency power supply are connected to the positive and negative poles of the vehicle battery pack respectively. The voltage of the vehicle battery pack forms a loop through the output clamp P+, the automatic isolation wake-up circuit, and the external output clamp P-. At this time, the automatic isolation wake-up circuit is driven, and the automatic isolation wake-up circuit outputs a WAKEUP SINGE signal to the power module. The power module wakes up and the emergency power supply starts.

[0016] Step 3: The power module outputs VDD voltage to drive the MCU main control;

[0017] Step 4: The MCU main control controls the main loop MOS module to close and conduct through the MIAN_MOS_CON signal, and the MCU main control detects the voltage difference between the external output clamp P+ and the external output clamp P- detected by the external voltage detection module through the P+(OUT)_AD signal;

[0018] Step 5: When the MCU main control detects that the external voltage is 0, the MCU main control controls the second MOS switch module to close through the MOS_CON2 signal, connects the voltage of the emergency power supply to the voltage detection module through the second MOS switch module, and outputs it to the external output clamp P+ after the current limiting function of the voltage detection module. At this time, the MCU main control detects the voltage difference between the external output clamp P+ and the external output clamp P- detected by the external voltage detection module again, and detects that there is a voltage value, then the external output clamp P+ and the external output clamp P- are not short-circuited;

[0019] Step 6: MCU main control detects OV voltage;

[0020] The MCU main control controls the second MOS switch module to be disconnected through the MOS_CON2 signal, and the MCU main control controls the first MOS switch module to be closed through the MOS_CON1 signal, and the voltage of the emergency power supply is connected to the power current limiting module through the first MOS switch module, and the power current limiting module outputs the voltage of the emergency power supply with a current of 10A limited to the external output clamp P+;

[0021] Step 7, the MCU main control again detects the voltage difference between the external output clamp P+ and the external output clamp P- detected by the external voltage detection module;

[0022] If the detected voltage is still 0V, the external output clamp P+ and the external output clamp P- are short-circuited, and the emergency power supply does not output current to the battery pack;

[0023] If the detected voltage rises slowly, it means that there is an external capacitive load being charged, and the external output clamp P+ and the external output clamp P- are not short-circuited. The MCU main control can output the required voltage by judging and controlling the output switching module.

[0024] In summary, the present invention has the following beneficial effects:

[0025] 1. Through the setting of the power module, it can supply power to the entire emergency power supply system and the MCU main control circuit to ensure the normal operation of the emergency power supply system;

[0026] 2. Through the setting of the output switching module, the MCU main control can judge and control the output of different voltage values ​​and disconnect the output voltage;

[0027] 3. Through the setting of MCU main control, after the power module is powered, the MCU main control will output a self-locking signal to keep the power module working, and will cooperate with other functional circuits to make corresponding control output effects on the emergency power supply;

[0028] 4. Through the setting of the external output clamp P+ and the external output clamp P-, the external output clamp P+ can be used to connect to the positive electrode of the vehicle battery pack, and the external output clamp P- can be used to connect to the negative electrode of the vehicle battery pack;

[0029] 5. Through the setting of the external voltage detection module, it can detect the voltage values ​​of the external output chuck P+ and the external output chuck P-, and then send them to the MCU main control;

[0030] 6. Through the setting of the first MOS switch module and the second MOS switch module, the output voltage of the emergency power supply can be controlled;

[0031] 7. Through the setting of the main circuit MOS module, it can control the on and off of the emergency power supply;

[0032] 8. Through the setting of the power current limiting module, the output current can be limited to achieve the current limiting effect;

[0033] 9. Through the setting of the automatic isolation wake-up circuit, the external output clamp P+ and the external output clamp P- can be connected to the positive and negative poles of the vehicle battery pack. The residual power of the vehicle battery pack can wake up the system power module through the automatic isolation wake-up circuit, thereby waking up the entire emergency power control system. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 is a circuit framework diagram of an embodiment;

[0035] Figure 2 It is a schematic diagram of the connection framework between the emergency power supply and the vehicle-mounted battery pack of the embodiment.

[0036] In the figure, 1. Emergency power supply; 2. Power supply module; 3. Output switching module; 4. MCU main control; 5. External output clamp P+; 6. External output clamp P-; 7. External voltage detection module; 8. First MOS switch module; 9. Second MOS switch module; 10. Power current limiting module; 11. Main circuit MOS module; 12. Automatic isolation wake-up circuit. DETAILED DESCRIPTION

[0037] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0038] The emergency power supply intelligently determines the short circuit of the external clamp, such as Figure 1 , Figure 2 As shown, it includes an emergency power supply 1, a power supply module 2, an output switching module 3, an MCU main control 4, an external output clamp P+5, an external output clamp P-6, an external voltage detection module 7, a first MOS switch module 8, a second MOS switch module 9, a power current limiting module 10, a main circuit MOS module 11, and an automatic isolation wake-up circuit 12;

[0039] The external output chuck P+5 is connected to the positive pole of the emergency power supply 1, the external output chuck P-6 is connected to the negative pole of the emergency power supply 1, the output switching module 3 is electrically connected between the external output chuck P+5 and the positive pole of the emergency power supply 1, and the main circuit MOS module 11 is electrically connected between the external output chuck P-6 and the negative pole of the emergency power supply 1;

[0040] The output end of the first MOS switch module 8 is electrically connected to the input end of the power current limiting module 10. The first MOS switch module 8, the power current limiting module 10 and the output switching module 3 are connected in parallel. The input end of the first MOS switch module 8 is located between the emergency power supply 1 and the output switching module 3. A diode D1 is provided at the connection between the first MOS switch module 8 and the positive electrode of the emergency power supply 1.

[0041] The output end of the second MOS switch module 9 is electrically connected to the input end of the external voltage detection module 7, the second MOS switch module 9 is connected to the input end of the diode D1, a diode D2 is provided at the input end of the second MOS switch module 9, and the output end of the external voltage detection module 7 is located between the output end of the power current limiting module 10 and the external output clamp P+5;

[0042] The input end of the power module 2 is connected to the positive pole of the emergency power supply 1, and the input end of the power module 2 is located between the input end of the first MOS switch module 8 and the positive pole of the emergency power supply 1. The input end of the MCU main control 4 is connected to the output end of the power module 2, and the output end of the MCU main control 4 is respectively connected to the first MOS switch module 8, the second MOS switch module 9, the external voltage detection module 7, and the main circuit MOS module 11.

[0043] The input end of the automatic isolation wake-up circuit 12 is connected to the external output clamp P+5, the first output end of the automatic isolation wake-up circuit 12 is connected to the external output clamp P-6, and the second output end of the automatic isolation wake-up circuit 12 is connected to the power module 2.

[0044] The workflow of the emergency power supply intelligently judging the short circuit of the external clamp includes the following steps:

[0045] Step 1: When the emergency power supply 1 is turned off, the vehicle battery pack needs to be charged;

[0046] Step 2: The external output clamp P+5 and the external output clamp P-6 of the emergency power supply 1 are respectively connected to the positive and negative poles of the vehicle-mounted battery pack. The voltage of the vehicle-mounted battery pack forms a loop through the output clamp P+, the automatic isolation wake-up circuit 12, and the external output clamp P-6. At this time, the automatic isolation wake-up circuit 12 is driven, and the automatic isolation wake-up circuit 12 outputs a WAKEUP S INGE signal to the power module 2. The power module 2 wakes up and the emergency power supply 1 is turned on.

[0047] Step 3, the power module 2 outputs the VDD voltage to drive the MCU main control 4;

[0048] Step 4: The MCU main control 4 controls the main loop MOS module 11 to be closed and turned on through the MIAN_MOS_CON signal, and the MCU main control 4 detects the voltage difference between the external output clamp P+5 and the external output clamp P-6 detected by the external voltage detection module 7 through the P+(OUT)_AD signal;

[0049] Step 5: The MCU main control 4 detects that the external voltage is 0, and the MCU main control 4 controls the second MOS switch module 9 to close through the MOS_CON2 signal, and connects the voltage of the emergency power supply 1 to the voltage detection module through the second MOS switch module 9, and outputs it to the external output clamp P+5 after the current limiting function of the voltage detection module. At this time, the MCU main control 4 again detects the voltage difference between the external output clamp P+5 and the external output clamp P-6 detected by the external voltage detection module 7, and detects that there is a voltage value, then the external output clamp P+5 and the external output clamp P-6 are not short-circuited;

[0050] Step 6, the MCU main control 4 detects the 0V voltage;

[0051] The MCU main control 4 controls the second MOS switch module 9 to be disconnected through the MOS_CON2 signal, and controls the first MOS switch module 8 to be closed through the MOS_CON1 signal, and connects the voltage of the emergency power supply 1 to the power current limiting module 10 through the first MOS switch module 8, and outputs the voltage of the emergency power supply 1 through the power current limiting module 10. The current of 10A of the voltage limiting current of the emergency power supply 1 is given to the external output clamp P+5;

[0052] Step 7, the MCU main control 4 again detects the voltage difference between the external output clamp P+5 and the external output clamp P-6 detected by the external voltage detection module 7;

[0053] If the detected voltage is still 0V, the external output clamp P+5 and the external output clamp P-6 are short-circuited, and the emergency power supply 1 does not output current to the battery pack;

[0054] If the detected voltage rises slowly, it means that there is an external capacitive load being charged, and the external output chuck P+5 and the external output chuck P-6 are not short-circuited. The MCU main control 4 can output the required voltage through the control of the output switching module 3.

[0055] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. The emergency power supply intelligently determines the short circuit of the external clamp, which is characterized by: It comprises an emergency power supply (1), a power supply module (2), an output switching module (3), an MCU main control (4), an external output clamp P+ (5), an external output clamp P- (6), an external voltage detection module (7), a first MOS switch module (8), a second MOS switch module (9), a power current limiting module (10), and a main circuit MOS module (11); The external output chuck P+ (5) is connected to the positive pole of the emergency power supply (1), the external output chuck P- (6) is connected to the negative pole of the emergency power supply (1), the output switching module (3) is electrically connected between the external output chuck P+ (5) and the positive pole of the emergency power supply (1), and the main circuit MOS module (11) is electrically connected between the external output chuck P- (6) and the negative pole of the emergency power supply (1); The output end of the first MOS switch module (8) is electrically connected to the input end of the power current limiting module (10); the first MOS switch module (8), the power current limiting module (10) and the output switching module (3) are connected in parallel; the input end of the first MOS switch module (8) is located between the emergency power supply (1) and the output switching module (3); and a diode D1 is provided at the connection between the first MOS switch module (8) and the positive electrode of the emergency power supply (1); The output end of the second MOS switch module (9) is electrically connected to the input end of the external voltage detection module (7), the second MOS switch module (9) is connected to the input end of the diode D1, a diode D2 is provided at the input end of the second MOS switch module (9), and the output end of the external voltage detection module (7) is located between the output end of the power current limiting module (10) and the external output clamp P+ (5); The input end of the power module (2) is connected to the positive electrode of the emergency power supply (1), the input end of the power module (2) is located between the input end of the first MOS switch module (8) and the positive electrode of the emergency power supply (1), the input end of the MCU main control (4) is connected to the output end of the power module (2), and the output end of the MCU main control (4) is respectively connected to the first MOS switch module (8), the second MOS switch module (9), the external voltage detection module (7), and the main loop MOS module (11).

2. The emergency power supply (1) according to claim 1 intelligently determines the short circuit of the external clamp, characterized in that: It also includes an automatic isolation wake-up circuit (12), wherein the input end of the automatic isolation wake-up circuit (12) is connected to the external output clamp P+ (5), the first output end of the automatic isolation wake-up circuit (12) is connected to the external output clamp P- (6), and the second output end of the automatic isolation wake-up circuit (12) is connected to the power module (2).

3. The working process of the emergency power supply intelligently judging the external clamp short circuit is used for the emergency power supply intelligently judging the external clamp short circuit as claimed in claim 2, characterized in that: The following steps are included: Step 1: When the emergency power supply (1) is turned off, the vehicle battery pack needs to be charged; Step 2: The external output clamp P+ (5) and the external output clamp P- (6) of the emergency power supply (1) are respectively connected to the positive and negative poles of the vehicle-mounted battery pack. The voltage of the vehicle-mounted battery pack forms a loop through the output clamp P+, the automatic isolation wake-up circuit (12), and the external output clamp P- (6). At this time, the automatic isolation wake-up circuit (12) is driven, and the automatic isolation wake-up circuit (12) outputs a WAKEUP SINGE signal to the power module (2). The power module (2) wakes up and the emergency power supply (1) is turned on. Step 3, the power module (2) outputs a VDD voltage to drive the MCU main control (4); Step 4: The MCU main control (4) controls the main circuit MOS module (11) to close and conduct through the MIAN_MOS_CON signal, and the MCU main control (4) detects the voltage difference between the external output clamp P+ (5) and the external output clamp P- (6) detected by the external voltage detection module (7) through the P+ (OUT)_AD signal; Step 5: The MCU main control (4) detects that the external voltage is 0, and the MCU main control (4) controls the second MOS switch module (9) to close through the MOS_CON2 signal, and connects the voltage of the emergency power supply (1) to the voltage detection module through the second MOS switch module (9), and outputs it to the external output clamp P+ (5) after the current limiting function of the voltage detection module. At this time, the MCU main control (4) again detects the voltage difference between the external output clamp P+ (5) and the external output clamp P- (6) detected by the external voltage detection module (7), and detects that there is a voltage value, and the external output clamp P+ (5) and the external output clamp P- (6) are not short-circuited; Step 6, the MCU main control (4) detects the 0V voltage; The MCU main control (4) controls the second MOS switch module (9) to be disconnected through the MOS_CON2 signal, and the MCU main control (4) controls the first MOS switch module (8) to be closed through the MOS_CON1 signal, and the voltage of the emergency power supply (1) is connected to the power current limiting module (10) through the first MOS switch module (8), and the voltage of the emergency power supply (1) is output through the power current limiting module (10) and the current of 10A of the voltage current limiting of the emergency power supply (1) is given to the external output clamp P+ (5); Step 7, the MCU main control (4) again detects the voltage difference between the external output clamp P+ (5) and the external output clamp P- (6) detected by the external voltage detection module (7); If the detected voltage is still 0V, the external output clamp P+ (5) and the external output clamp P- (6) are short-circuited, and the emergency power supply (1) does not output current to the battery pack; If the detected voltage rises slowly, it means that there is an external capacitive load being charged, and the external output clamp P+ (5) and the external output clamp P- (6) are not short-circuited. The MCU main control (4) can output the required voltage through the control of the output switching module (3).

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