Adaptive start battery auto start-stop circuit

Abstract

The application discloses an adaptive starting battery automatic start-stop circuit, which comprises a battery connection port, a power output port and at least two battery start-stop identification circuits; the input end of each battery start-stop identification circuit is connected with the battery connection port, and the output end of each battery start-stop identification circuit is connected with the power output port; each battery start-stop identification circuit is used for identifying a starting battery of a voltage grade and performing start-stop control on the starting battery according to the voltage of the starting battery. The application can adapt to starting batteries of different voltage grades and can cut off the power supply of the starting battery to the power load when the voltage of the starting battery is low.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of battery management system of vehicles, and particularly discloses an adaptive starting battery automatic start-stop circuit. BACKGROUND

[0002] The existing vehicles and ships and other vehicles are provided with starting batteries, which are used to provide starting current when the vehicles start, and are also used to supply power to the electrical loads (such as lighting lamps and fans) on the vehicles. In the case that the voltage of the starting battery is too low, the vehicle may not start normally. Therefore, it is necessary to cut off the power supply of the starting battery to the electrical load when the voltage of the starting battery is low, so as to avoid excessive consumption of the power of the starting battery and cause the vehicle to fail to start normally.

[0003] At present, the starting batteries have different voltage levels, such as 12V starting batteries and 24V starting batteries. Most of the power management systems of the vehicles cannot simultaneously accommodate starting batteries with different voltage levels. The power management system needs to set corresponding hardware parameters to match starting batteries with different voltage levels, so that the power management system can control the starting battery to cut off the power supply to the electrical load when the voltage of the starting battery is low. Therefore, different power management systems need to be set for starting batteries with different voltage levels, and the types of power management systems are many and inconvenient to manage and control.

[0004] In view of the above problems, it is necessary to study an adaptive starting battery automatic start-stop circuit, which can adapt to starting batteries with different voltage levels and can cut off the power supply of the starting battery to the electrical load when the voltage of the starting battery is low. SUMMARY

[0005] The purpose of the present application is to provide an adaptive starting battery automatic start-stop circuit, which can adapt to starting batteries with different voltage levels and can cut off the power supply of the starting battery to the electrical load when the voltage of the starting battery is low.

[0006] In order to achieve the above purpose, the solution of the present application is:

[0007] The application discloses an adaptive starting battery automatic start-stop circuit which comprises a battery connecting port, a power output port and at least two battery start-stop identification circuits; the input end of each battery start-stop identification circuit is connected with the battery connecting port, and the output end of each battery start-stop identification circuit is connected with the power output port; each battery start-stop identification circuit comprises a battery identification unit, a battery start-stop unit and a one-way output unit; the battery identification unit comprises a first identification resistor, a second identification resistor, a third identification resistor, a first voltage reference chip and an identification switch unit, the first end of the first identification resistor, the first end of the third identification resistor and the input end of the identification switch unit are connected with the input end of the battery identification unit, and the output end of the identification switch unit is connected with the output end of the battery identification unit; the second end of the first identification resistor and the first end of the second identification resistor are connected with the reference end of the first voltage reference chip, the second end of the third identification resistor and the cathode of the first voltage reference chip are connected with the control end of the identification switch unit, the second end of the second identification resistor and the anode of the first voltage reference chip are grounded, and the identification switch unit is turned on when the control end is at a low level; the battery start-stop unit comprises a first start-stop resistor, a second start-stop resistor, a third start-stop resistor, a fourth start-stop resistor, a fifth start-stop resistor, a second voltage reference chip and a start-stop switch unit, the first end of the first start-stop resistor, the first end of the third start-stop resistor and the input end of the start-stop switch unit are connected with the input end of the battery start-stop unit, the output end of the start-stop switch unit and the first end of the fifth start-stop resistor are connected with the output end of the battery start-stop unit, the second end of the first start-stop resistor, the first end of the second start-stop resistor and the second end of the fifth start-stop resistor are connected with the reference end of the second voltage reference chip, the second end of the third start-stop resistor and the first end of the fourth start-stop resistor are connected with the control end of the start-stop switch unit, the second end of the fourth start-stop resistor is connected with the cathode of the second voltage reference chip, the second end of the second start-stop resistor and the anode of the second voltage reference chip are grounded, and the start-stop switch unit is turned on when the control end is at a low level; the input end of the battery identification unit and the input end of the battery start-stop unit of each battery start-stop identification circuit are connected with the input end of the battery start-stop identification circuit, the output end of the battery start-stop unit of each battery start-stop identification circuit is connected with the output end of the battery start-stop identification circuit through the one-way output unit, and the output end of the battery identification unit of each battery start-stop identification circuit is connected with the battery start-stop unit of the battery start-stop identification circuit and controls the on-off of the battery start-stop unit; each battery start-stop identification circuit has identification voltage thresholds, starting voltage thresholds and stopping voltage thresholds which are sequentially reduced; each battery start-stop identification circuit is sequentially arranged, and the identification voltage threshold of a previous battery start-stop identification circuit is smaller than the starting voltage threshold of a subsequent battery start-stop identification circuit; when the voltage of the battery connecting port is smaller than the identification voltage threshold of a certain battery start-stop identification circuit, the first reference voltage chip of the battery start-stop identification circuit is turned off; when the voltage of the battery connecting port is greater than the starting voltage threshold of a certain battery start-stop identification circuit, the second voltage reference chip of the battery start-stop identification circuit is turned on.When the voltage of the battery connection port is less than the battery start-stop identification circuit off voltage threshold, the second voltage reference chip of the battery start-stop identification circuit is turned off.

[0008] The reference voltages of the first voltage reference chip and the second voltage reference chip of each battery start-stop identification circuit are the same. The ratios of the first identification resistance and the second identification resistance of each battery start-stop identification circuit are different.

[0009] The identification switch unit includes a first identification switch tube and a fourth identification resistance, the first end of the fourth identification resistance is connected to the control end of the identification switch unit, the second end of the fourth identification resistance is connected to the base of the first identification switch tube, and the emitter and the collector of the first identification switch tube are respectively connected to the input end and the output end of the identification switch unit.

[0010] The start-stop switch unit includes a first start-stop switch tube and a sixth start-stop resistance, the first end of the sixth start-stop resistance is connected to the control end of the start-stop switch unit, the second end of the sixth start-stop resistance is connected to the base of the first start-stop switch tube, and the emitter and the collector of the first start-stop switch tube are respectively connected to the input end and the output end of the start-stop switch unit.

[0011] The battery identification unit further includes a first identification capacitor, the first end of the first identification capacitor is connected to the reference end of the first voltage reference chip, and the second end of the first identification capacitor is grounded.

[0012] The battery start-stop unit further includes a first start-stop capacitor, the first end of the first start-stop capacitor is connected to the reference end of the second voltage reference chip, and the second end of the first start-stop capacitor is grounded.

[0013] The unidirectional output unit includes a first diode, the anode and the cathode of the first diode are respectively connected to the output end of the battery start-stop unit of each battery start-stop identification circuit and the output end of the battery start-stop identification circuit.

[0014] The adaptive starting battery automatic start-stop circuit further comprises a power generation switch circuit; an input end of the power generation switch circuit is used for accessing a power generation enable signal, and the power generation switch circuit outputs a low-level signal when the power generation enable signal is valid; the battery start-stop unit of each battery start-stop identification circuit further comprises a threshold adjustment unit, a first parallel end of the threshold adjustment unit of the battery start-stop unit is connected to a first end of the second start-stop resistor of the battery start-stop unit, a second parallel end of the threshold adjustment unit of the battery start-stop unit is connected to a second end of the second start-stop resistor of the battery start-stop unit, and a control end of the threshold adjustment unit of the battery start-stop unit is connected to an output end of the power generation switch circuit; the threshold adjustment unit comprises an adjustment resistor and an adjustment MOS tube, a first end of the adjustment resistor is connected to the first parallel end of the threshold adjustment unit, a second end of the adjustment resistor is connected to a drain of the adjustment MOS tube, a source of the adjustment MOS tube is connected to the second parallel end of the threshold adjustment unit, and a gate of the adjustment MOS tube is connected to the control end of the threshold adjustment unit.

[0015] The power generation switch circuit comprises a first power generation switch resistor, a second power generation switch resistor, a third power generation switch resistor, a fourth power generation switch resistor and a first power generation triode; a first end of the first power generation switch resistor is connected to an input end of the power generation switch circuit, a second end of the first power generation switch resistor and a first end of the second power generation switch resistor are connected to a base of the first power generation triode, a collector of the first power generation triode, a first end of the third power generation switch resistor and a first end of the fourth power generation switch resistor are connected to an output end of the power generation switch circuit, an emitter of the first power generation triode, a second end of the second power generation switch resistor and a second end of the fourth power generation switch resistor are grounded, and a second end of the third power generation switch resistor is connected to a battery connection port; the power generation enable signal is valid in a high level.

[0016] The power generation switch circuit further comprises a first power generation stabilizing tube, a negative electrode of the first power generation stabilizing tube is connected to a collector of the first power generation triode, and a positive electrode of the first power generation stabilizing tube is grounded.

[0017] After the above scheme is adopted, after a starting battery of a certain voltage level is accessed, if the voltage of the starting battery is between the identification voltage threshold and the starting voltage threshold of a certain battery start-stop identification circuit, the battery start-stop identification circuit is turned on, and the starting battery supplies power to the power consumption load through the battery start-stop identification circuit, and after the voltage of the starting battery drops to be less than the shutdown voltage threshold of the battery start-stop identification circuit, the battery start-stop identification circuit is turned off, and the power supply of the starting battery to the power consumption load is cut off. As can be seen, the starting battery of different voltage levels can be adapted, and the power supply of the starting battery to the power consumption load can be cut off when the voltage of the starting battery is low. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a principle block diagram of the embodiment one of the present application.

[0019] Figure 2 Circuit schematic diagram of the battery start-stop identification circuit for the embodiment one of the application.

[0020] Figure 3 Principle block diagram for the embodiment two of the application.

[0021] Figure 4 Circuit schematic diagram of the battery start-stop identification circuit for the embodiment two of the application.

[0022] Figure 5 Circuit schematic diagram of the power generation switch circuit for the embodiment two of the application.

[0023] Label explanation:

[0024] Battery connection port 1,

[0025] Power supply output port 2,

[0026] Battery start-stop identification circuit 3,

[0027] Battery identification unit 31, first identification resistor R11, second identification resistor R12, third identification resistor R13, fourth identification resistor R14, first identification capacitor C11, first voltage reference chip IC11, first identification switch tube Q11, identification switch unit 311,

[0028] Battery start-stop unit 32, first start-stop resistor R21, second start-stop resistor R22, third start-stop resistor R23, fourth start-stop resistor R24, fifth start-stop resistor R25, sixth start-stop resistor R26, first start-stop capacitor C21, second voltage reference chip IC21, first start-stop switch tube Q21, start-stop switch unit 321, threshold value adjustment unit 322, adjustment resistor Rt, adjustment MOS tube Mt,

[0029] One-way output unit 33, first diode D1,

[0030] Current limiting circuit 4,

[0031] Power generation switch circuit 5, first power generation switch resistor R31, second power generation switch resistor R32, third power generation switch resistor R33, fourth power generation switch resistor R34, first power generation triode Q31, first power generation zener ZD31. DETAILED DESCRIPTION

[0032] In order to further explain the technical solutions of the application, the application will be described in detail below through specific embodiments.

[0033] Embodiment one:

[0034] Cooperation Figure 1 And Figure 2As shown, in the embodiment one of the application, the adaptive starting battery automatic start-stop circuit of the application comprises a battery connection port 1, a power output port 2, and at least two battery start-stop identification circuits 3; the input end of each battery start-stop identification circuit 3 is connected to the battery connection port 1, and the output end of each battery start-stop identification circuit 3 is connected to the power output port 2; wherein each battery start-stop identification circuit 3 comprises a battery identification unit 31, a battery start-stop unit 32 and a one-way output unit 33; the battery identification unit 31 comprises a first identification resistor R11, a second identification resistor R12, a third identification resistor R13, a first voltage reference chip IC11 and an identification switch unit 311, the first end of the first identification resistor R11, the first end of the third identification resistor R13 and the input end of the identification switch unit 311 are connected to the input end of the battery identification unit 31, and the output end of the identification switch unit 311 is connected to the output end of the battery identification unit 31; the second end of the first identification resistor R11 and the first end of the second identification resistor R12 are connected to the reference end of the first voltage reference chip IC11, the second end of the third identification resistor R13 and the cathode of the first voltage reference chip IC11 are connected to the control end of the identification switch unit 311, the second end of the second identification resistor R12 and the anode of the first voltage reference chip IC11 are grounded, and the identification switch unit 311 is turned on when the control end thereof is at a low level; the battery start-stop unit 32 comprises a first start-stop resistor R21, a second start-stop resistor R22, a third start-stop resistor R23, a fourth start-stop resistor R24, a fifth start-stop resistor R25, a second voltage reference chip IC21 and a start-stop switch unit 321, the first end of the first start-stop resistor R21, the first end of the third start-stop resistor R23 and the input end of the start-stop switch unit 321 are connected to the input end of the battery start-stop unit 32, the output end of the start-stop switch unit 321 and the first end of the fifth start-stop resistor R25 are connected to the output end of the battery start-stop unit 32, the second end of the first start-stop resistor R21, the first end of the second start-stop resistor R22 and the second end of the fifth start-stop resistor R25 are connected to the reference end of the second voltage reference chip IC21, the second end of the third start-stop resistor R23 and the first end of the fourth start-stop resistor R24 are connected to the control end of the start-stop switch unit 321, the second end of the fourth start-stop resistor R24 is connected to the cathode of the second voltage reference chip IC21, the second end of the second start-stop resistor R22 and the anode of the second voltage reference chip IC21 are grounded, and the start-stop switch unit 321 is turned on when the control end thereof is at a low level.The input end of the battery identification unit 31 and the input end of the battery start-stop unit 32 of each battery start-stop identification circuit 3 are connected to the input end of the battery start-stop identification circuit 3, the output end of the battery start-stop unit 32 of each battery start-stop identification circuit 3 is connected to the output end of the battery start-stop identification circuit 3 through the unidirectional output unit 33, and the output end of the battery identification unit 31 of each battery start-stop identification circuit 3 is connected to the control end of the start-stop switch unit 321 of the battery start-stop unit 32 of the battery start-stop identification circuit 3 and is used to control the on-off of the start-stop switch unit 321 of the battery start-stop unit 32.

[0035] The working principle of the application is that the battery connection port 1 is used to connect a starting battery, the power output port 2 is used to connect an electric load, each battery start-stop identification circuit 3 has identification voltage threshold values, starting voltage threshold values and shutdown voltage threshold values which are sequentially reduced, and each battery start-stop identification circuit 3 is sequentially arranged, the identification voltage threshold value of a previous battery start-stop identification circuit 3 is less than the starting voltage threshold value of a subsequent battery start-stop identification circuit 3.

[0036] When the voltage of the battery connection port 1 is greater than the identification voltage threshold value of a certain battery start-stop identification circuit 3, the first reference voltage chip of the battery start-stop identification circuit 3 is turned on (at this time, the reference end voltage of the first voltage reference chip IC11 is greater than the reference voltage of the first voltage reference chip IC11), so as to pull down the control end level of the identification switch unit 311 of the battery start-stop identification circuit 3 to make the identification switch unit 311 conduct, so that the identification switch unit 311 of the battery start-stop identification circuit 3 inputs a high level to the control end of the start-stop switch unit 321 of the battery start-stop identification circuit 3, so that the start-stop switch unit 321 of the battery start-stop identification circuit 3 is turned off, at this time, the battery start-stop identification circuit 3 is in an off state, and the battery start-stop identification circuit 3 does not output; when the voltage of the battery connection port 1 is less than the identification voltage threshold value of a certain battery start-stop identification circuit 3, the first reference voltage chip of the battery start-stop identification circuit 3 is turned off (at this time, the reference end voltage of the first voltage reference chip IC11 is less than the reference voltage of the first voltage reference chip IC11), so as to make the control end of the identification switch unit 311 of the battery start-stop identification circuit 3 be a high level to make the identification switch unit 311 be turned off, at this time, the identification switch unit 311 of the battery start-stop identification circuit 3 does not input a high level to the control end of the start-stop switch unit 321 of the battery start-stop identification circuit 3, that is, makes the battery start-stop unit 32 of the battery start-stop identification circuit 3 enter a start-stop working state.

[0037] When the battery start-stop unit 32 of the battery start-stop identification circuit 3 enters the start-stop working state, if the voltage of the battery connection port 1 is greater than the start voltage threshold of the battery start-stop identification circuit 3, the second voltage reference chip IC21 of the battery start-stop identification circuit 3 is turned on (at this time, the reference end voltage of the second voltage reference chip IC21 is greater than the reference voltage of the second voltage reference chip IC21), at this time, if the identification switch unit 311 of the battery start-stop identification circuit 3 does not input high level to the control end of the start-stop switch unit 321 of the battery start-stop identification circuit 3, the control end level of the start-stop switch unit 321 of the battery start-stop identification circuit 3 is pulled low to make the start-stop switch unit 321 conduct, at this time, the battery start-stop identification circuit 3 is in the conductive state, that is, to make the starting battery supply power to the power load through the battery start-stop identification circuit 3; after the second voltage reference chip IC21 of the battery start-stop identification circuit 3 is turned on (that is, after the battery start-stop identification circuit 3 is turned on), if the voltage of the battery connection port 1 drops to less than the stop voltage threshold of the battery start-stop identification circuit 3, the second voltage reference chip IC21 of the battery start-stop identification circuit 3 is turned off (at this time, the reference end voltage of the second voltage reference chip IC21 is less than the reference voltage of the second voltage reference chip IC21), so that the control end level of the start-stop switch unit 321 of the battery start-stop identification circuit 3 is raised to make the start-stop switch unit 321 turn off, at this time, the battery start-stop identification circuit 3 is in the off state.

[0038] As can be seen from the above, after the starting battery is connected, each battery start-stop identification circuit 3 first determines whether the voltage of the starting battery (i.e., the voltage of the battery connection port 1) is less than the identification voltage threshold of the battery start-stop identification circuit 3 (performing a first identification of the starting battery voltage level); if the voltage of the starting battery is less than the identification voltage threshold of the battery start-stop identification circuit 3, then the battery start-stop identification circuit 3 further determines whether the voltage of the starting battery is greater than the start-up voltage threshold of the battery start-stop identification circuit 3 (performing a second identification of the starting battery voltage level); if the voltage of the starting battery is... If the voltage of the starting battery is greater than the start-up voltage threshold of the battery start-up identification circuit 3, then the battery start-up identification circuit 3 is in a conducting state, allowing the starting battery to supply power to the electrical load through the battery start-up identification circuit 3 (that is, the voltage of a starting battery of a certain voltage level needs to be between the identification voltage threshold and the start-up voltage threshold of the battery start-up identification circuit 3 for the battery start-up identification circuit 3 to conduct); subsequently, if the voltage of the starting battery drops to less than the shutdown voltage threshold of the battery start-up identification circuit 3, then the battery start-up identification circuit 3 is in a shut-off state, preventing the starting battery from supplying power to the electrical load. Since the identification voltage threshold of the previous battery start-up identification circuit 3 is less than the start-up voltage threshold of the next battery start-up identification circuit 3 after sequential arrangement, each battery start-up identification circuit 3 will be individually adapted to a starting battery of a specific voltage level, avoiding different battery start-up identification circuits 3 being in a conducting state simultaneously.

[0039] In summary, when a starting battery of a certain voltage level is connected, if the voltage of the starting battery is between the identification voltage threshold and the starting voltage threshold of a battery start-stop identification circuit 3, then the battery start-stop identification circuit 3 is turned on, and the starting battery supplies power to the electrical load through the battery start-stop identification circuit 3. Furthermore, when the voltage of the starting battery drops below the shutdown voltage threshold of the battery start-stop identification circuit 3, the battery start-stop identification circuit 3 is turned off, cutting off the power supply from the starting battery to the electrical load. Therefore, this invention can adapt to starting batteries of different voltage levels and can cut off the power supply from the starting battery to the electrical load when the starting battery voltage is low.

[0040] To facilitate understanding of Embodiment 1 of the present invention, the following description uses two battery start-stop identification circuits 3 as an example; wherein, the first battery start-stop identification circuit 3 is adapted to a 12V start-up battery, and the identification voltage threshold, start-up voltage threshold, and shutdown voltage threshold of the first battery start-stop identification circuit 3 are 18V, 13V, and 12.5V, respectively; the second battery start-stop identification circuit 3 is adapted to a 24V start-up battery, and the identification voltage threshold, start-up voltage threshold, and shutdown voltage threshold of the second battery start-stop identification circuit 3 are 36V, 26V, and 25V, respectively;

[0041] When the voltage of the starting battery connected is between 13V and 18V, the first battery start-stop identification circuit 3 is in the on state, the second battery start-stop identification circuit 3 is in the off state (the second voltage reference chip IC21 of the second battery start-stop identification circuit 3 is off), the starting battery supplies power to the load through the first battery start-stop identification circuit 3; and when the voltage of the starting battery drops below 12.5V, the first battery start-stop identification circuit 3 is off, cutting off the power supply of the starting battery to the load.

[0042] When the voltage of the starting battery connected is between 25V and 36V, the first battery start-stop identification circuit 3 is in the off state (the first voltage reference chip IC11 of the second battery start-stop identification circuit 3 is on), the second battery start-stop identification circuit 3 is in the on state, the starting battery supplies power to the load through the second battery start-stop identification circuit 3; and when the voltage of the starting battery drops below 25V, the second battery start-stop identification circuit 3 is off, cutting off the power supply of the starting battery to the load.

[0043] In the first embodiment of the present application, the identification voltage threshold of each battery start-stop identification circuit 3 can be set by the reference voltage of the first voltage reference chip IC11 and the ratio of the first identification resistor R11 and the second identification resistor R12, the starting voltage threshold of each battery start-stop identification circuit 3 can be set by the reference voltage of the second voltage reference chip IC21 and the ratio of the first start-stop resistor R21 and the second start-stop resistor R22, and the shutdown voltage threshold of each battery start-stop identification circuit 3 can be set by the reference voltage of the second voltage reference chip IC21, the resistance value of the fifth start-stop resistor R25, and the ratio of the first start-stop resistor R21 and the second start-stop resistor R22. It should be noted that after the second voltage reference chip IC21 is on and the start-stop switch unit 321 is on, the output voltage of the start-stop switch unit 321 will act on the reference end of the second voltage reference chip IC21 through the fifth start-stop resistor R25, so that the starting battery voltage required for the second voltage reference chip IC21 to be off is reduced, i.e. the shutdown voltage threshold is less than the starting voltage threshold, so as to prevent the circuit from repeatedly turning on and off.

[0044] In the embodiment one of the present application, in order to facilitate the material control, the reference voltages of the first voltage reference chip IC11 and the second voltage reference chip IC21 of each battery start-stop identification circuit 3 are the same, so the same kind of voltage reference chip can be used for each first voltage reference chip IC11 and second voltage reference chip IC21; the ratio of the first identification resistance R11 to the second identification resistance R12 of each battery start-stop identification circuit 3 is different; the ratio of the first start-stop resistance R21 to the second start-stop resistance R22 of each battery start-stop identification circuit 3 is different, and the ratio of the first identification resistance R11 to the second identification resistance R12 of each battery start-stop identification circuit 3 is greater than the ratio of the first start-stop resistance R21 to the second start-stop resistance R22 of the battery start-stop identification circuit 3.

[0045] In the embodiment one of the present application, the identification switch unit 311 can include the first identification switch tube Q11 and the fourth identification resistance R14, the first end of the fourth identification resistance R14 is connected to the control end of the identification switch unit 311, the second end of the fourth identification resistance R14 is connected to the base of the first identification switch tube Q11, the emitter and the collector of the first identification switch tube Q11 are respectively connected to the input end and the output end of the identification switch unit 311, and the first identification switch tube Q11 is turned on when the control end of the identification switch unit 311 is at low level. And the start-stop switch unit 321 can include the first start-stop switch tube Q21 and the sixth start-stop resistance R26, the first end of the sixth start-stop resistance R26 is connected to the control end of the start-stop switch unit 321, the second end of the sixth start-stop resistance R26 is connected to the base of the first start-stop switch tube Q21, the emitter and the collector of the first start-stop switch tube Q21 are respectively connected to the input end and the output end of the start-stop switch unit 321, and the first start-stop switch tube Q21 is turned on when the control end of the start-stop switch unit 321 is at low level.

[0046] In the embodiment one of the present application, the battery identification unit 31 can further include the first identification capacitor C11, the first end of the first identification capacitor C11 is connected to the reference end of the first voltage reference chip IC11, and the second end of the first identification capacitor C11 is grounded, and the first identification capacitor C11 can stabilize the reference end voltage of the first voltage reference chip IC11. Similarly, the battery start-stop unit 32 can further include the first start-stop capacitor C21, the first end of the first start-stop capacitor C21 is connected to the reference end of the second voltage reference chip IC21, and the second end of the first start-stop capacitor C21 is grounded.

[0047] In the embodiment one of the present application, the unidirectional output unit 33 comprises a first diode D1, the positive and negative poles of the first diode D1 are connected with the output end of the battery start-stop unit 32 of each battery start-stop identification circuit 3 and the output end of the battery start-stop identification circuit 3 respectively; the unidirectional output unit 33 is used for making each battery start-stop identification circuit 3 realize unidirectional output, so that the outputs of each battery start-stop identification circuit 3 are independent of each other, and the normal work of each battery start-stop identification circuit 3 is ensured.

[0048] In the embodiment one of the present application, the output end of each battery start-stop identification circuit 3 can be connected with the power output port 2 through the current limiting circuit 4, the current limiting circuit 4 comprises at least two parallel current limiting resistors, and the current limiting circuit 4 can play a current limiting role to protect the electric load.

[0049] Embodiment two

[0050] Cooperation Figures 3 to 5 As shown in the figure, the embodiment two of the present application is different from the embodiment one in that: compared with the embodiment one, the embodiment two of the present application further increases the power generation switch circuit and the threshold adjusting unit controlled by the power generation switch circuit.

[0051] Specifically, in the embodiment two of the present application, the adaptive start battery automatic start-stop circuit of the present application further comprises a power generation switch circuit 5; the input end of the power generation switch circuit 5 is used for connecting with a power generation enable signal, and the power generation switch circuit 5 outputs a low-level signal when the power generation enable signal is valid; the battery start-stop unit 32 of each battery start-stop identification circuit 3 further comprises a threshold adjusting unit 322, the first parallel end of the threshold adjusting unit 322 of the battery start-stop unit 32 is connected with the first end of the second start-stop resistor R22 of the battery start-stop unit 32, the second parallel end of the threshold adjusting unit 322 of the battery start-stop unit 32 is connected with the second end of the second start-stop resistor R22 of the battery start-stop unit 32, and the control end of the threshold adjusting unit 322 of the battery start-stop unit 32 is connected with the output end of the power generation switch circuit 5; the threshold adjusting unit 322 comprises an adjusting resistor Rt and an adjusting MOS tube Mt, the first end of the adjusting resistor Rt is connected with the first parallel end of the threshold adjusting unit 322, the second end of the adjusting resistor Rt is connected with the drain of the adjusting MOS tube Mt, the source of the adjusting MOS tube Mt is connected with the second parallel end of the threshold adjusting unit 322, and the gate of the adjusting MOS tube Mt is connected with the control end of the threshold adjusting unit 322.

[0052] In the second embodiment of the present application, the starting voltage threshold of each battery start-stop identification circuit 3 can be set by the reference voltage of the second voltage reference chip IC21, the resistance value of the first start-stop resistor R21, the resistance value of the second start-stop resistor R22, the resistance value of the adjusting resistor Rt, and whether the adjusting resistor Rt is connected in parallel with the second start-stop resistor R22; the closing voltage threshold of each battery start-stop identification circuit 3 can be set by the reference voltage of the second voltage reference chip IC21, the resistance value of the fifth start-stop resistor R25, the resistance value of the first start-stop resistor R21, the resistance value of the second start-stop resistor R22, the resistance value of the adjusting resistor Rt, and whether the adjusting resistor Rt is connected in parallel with the second start-stop resistor R22.

[0053] The second embodiment of the present application is suitable for the case that the battery connection port 1 is connected with a generator and a starting battery. When the generator is working, at this time the generator enable signal is effective, so that the generator switch circuit 5 outputs a low level signal to the threshold adjusting unit 322 of the battery start-stop unit 32 of each battery start-stop identification circuit 3, so that the adjusting MOS tube Mt of the threshold adjusting unit 322 is turned off, at this time only the second start-stop resistor R22 constitutes the pull-down resistor of the second voltage reference chip IC21, so that the starting voltage threshold and the closing voltage threshold of each battery start-stop identification circuit 3 are set as a low starting voltage threshold and a low closing voltage threshold respectively, at this time at least one battery start-stop identification circuit 3 is in the conducting state, so that the generator supplies power to the power load through the conducting battery start-stop identification circuit 3, at this time the power load is mainly supplied by the generator, so as to reduce the power loss of the starting battery. When the generator is not working, at this time the generator enable signal is invalid, so that the generator switch circuit 5 outputs a high level signal to the threshold adjusting unit 322 of the battery start-stop unit 32 of each battery start-stop identification circuit 3, so that the adjusting MOS tube Mt of the threshold adjusting unit 322 is turned on, so that the adjusting resistor Rt is connected in parallel with the second start-stop resistor R22, that is, the parallel adjusting resistor Rt and the second start-stop resistor R22 constitute the pull-down resistor of the second voltage reference chip IC21, so that the starting voltage threshold and the closing voltage threshold of each battery start-stop identification circuit 3 are set as a high starting voltage threshold and a high closing voltage threshold respectively (that is, the starting voltage threshold and the closing voltage threshold are raised), at this time the starting battery supply state is in the starting battery supply state, each battery start-stop identification circuit 3 works according to the voltage level of the starting battery connected to the battery connection port 1, so as to realize the adaptation to the starting battery with different voltage levels.

[0054] In the second embodiment of the present application, the power generation switch circuit 5 comprises a first power generation switch resistor R31, a second power generation switch resistor R32, a third power generation switch resistor R33, a fourth power generation switch resistor R34 and a first power generation triode Q31; a first end of the first power generation switch resistor R31 is connected to an input end of the power generation switch circuit 5, a second end of the first power generation switch resistor R31 and a first end of the second power generation switch resistor R32 are connected to a base of the first power generation triode Q31, a collector of the first power generation triode Q31, a first end of the third power generation switch resistor R33 and a first end of the fourth power generation switch resistor R34 are connected to an output end of the power generation switch circuit 5, an emitter of the first power generation triode Q31, a second end of the second power generation switch resistor R32 and a second end of the fourth power generation switch resistor R34 are grounded, and a second end of the third power generation switch resistor R33 is connected to a battery connection port; the power generation enable signal is high level effective. When the power generation enable signal is high level, the first power generation triode Q31 is turned on to pull down the output end level of the power generation switch circuit 5, so that the output end of the power generation switch circuit 5 outputs a low level signal; and when the power generation enable signal is high level, the first power generation triode Q31 is turned off, at this time the output end of the power generation switch circuit 5 outputs a high level signal.

[0055] In the second embodiment of the present application, the power generation switch circuit 5 can further comprise a first power generation zener ZD31, a negative electrode of the first power generation zener ZD31 is connected to a collector of the first power generation triode Q31, and a positive electrode of the first power generation zener ZD31 is grounded, so that the first power generation zener ZD31 can prevent the battery connection port 1 from being damaged due to excessively high voltage.

[0056] The above embodiments and drawings are not limited to the product shape and style of the present application, and any appropriate changes or modifications made by those skilled in the art should be considered as not departing from the scope of the present application.

Claims

1. An adaptive start-stop battery circuit, characterized in that: It includes a battery connection port, a power output port, and at least two battery start-stop identification circuits; the input of each battery start-stop identification circuit is connected to the battery connection port, and the output of each battery start-stop identification circuit is connected to the power output port. Each battery start-stop identification circuit includes a battery identification unit, a battery start-stop unit, and a unidirectional output unit. The battery identification unit includes a first identification resistor, a second identification resistor, a third identification resistor, a first voltage reference chip, and an identification switch unit. The first terminal of the first identification resistor, the first terminal of the third identification resistor, and the input terminal of the identification switch unit are connected to the input terminal of the battery identification unit. The output terminal of the identification switch unit is connected to the output terminal of the battery identification unit. The second terminal of the first identification resistor and the first terminal of the second identification resistor are connected to the reference terminal of the first voltage reference chip. The second terminal of the third identification resistor and the cathode of the first voltage reference chip are connected to the control terminal of the identification switch unit. The second terminal of the second identification resistor and the anode of the first voltage reference chip are grounded. The identification switch unit is turned on when its control terminal is low. The battery start-stop unit includes a first start-stop resistor, a second start-stop resistor, a third start-stop resistor, a fourth start-stop resistor, a fifth start-stop resistor, a second voltage reference chip, and a start-stop switch unit. The first terminal of the first start-stop resistor, the first terminal of the third start-stop resistor, and the start-stop switch unit are connected to the reference terminal. The input terminal of the unit is connected to the input terminal of the battery start-stop unit. The output terminal of the start-stop switch unit and the first terminal of the fifth start-stop resistor are connected to the output terminal of the battery start-stop unit. The second terminals of the first, second, and fifth start-stop resistors are connected to the reference terminal of the second voltage reference chip. The second terminals of the third and fourth start-stop resistors are connected to the control terminal of the start-stop switch unit. The second terminal of the fourth start-stop resistor is connected to the cathode of the second voltage reference chip. The second terminal of the second start-stop resistor and the anode of the second voltage reference chip are grounded. The start-stop switch unit is turned on when its control terminal is low. The input terminal of the battery identification unit of each battery start-stop identification circuit and the input terminal of the battery start-stop unit are connected to the input terminal of the battery start-stop identification circuit. The output terminal of the battery start-stop unit of each battery start-stop identification circuit is connected to the output terminal of the battery start-stop identification circuit through a unidirectional output unit. The output terminal of the battery identification unit of each battery start-stop identification circuit is connected to the battery start-stop unit of the battery start-stop identification circuit and controls the on / off state of the battery start-stop unit. Each battery start-stop identification circuit has successively decreasing identification voltage threshold, start voltage threshold, and stop voltage threshold; the battery start-stop identification circuits are arranged in sequence, and the identification voltage threshold of the previous battery start-stop identification circuit is less than the start voltage threshold of the next battery start-stop identification circuit. When the voltage at the battery connection port is less than the identification voltage threshold of a certain battery start-stop identification circuit, the first reference voltage chip of the battery start-stop identification circuit is turned off; when the voltage at the battery connection port is greater than the start-up voltage threshold of a certain battery start-stop identification circuit, the second voltage reference chip of the battery start-stop identification circuit is turned on; after the second voltage reference chip of the battery start-stop identification circuit is turned on, if the voltage at the battery connection port drops to less than the stop-down voltage threshold of the battery start-stop identification circuit, the second voltage reference chip of the battery start-stop identification circuit is turned off.

2. The adaptive start-stop battery circuit as described in claim 1, characterized in that: The reference voltages of the first and second voltage reference chips in each battery start-stop identification circuit are the same. The ratio of the first identification resistor to the second identification resistor is different in each battery start-stop identification circuit; The ratio of the first start-stop resistor to the second start-stop resistor is different in each battery start-stop identification circuit.

3. The adaptive start-stop battery circuit as described in claim 1, characterized in that: The identification switch unit includes a first identification switch transistor and a fourth identification resistor. The first end of the fourth identification resistor is connected to the control terminal of the identification switch unit, and the second end of the fourth identification resistor is connected to the base of the first identification switch transistor. The emitter and collector of the first identification switch transistor are respectively connected to the input terminal and the output terminal of the identification switch unit.

4. The adaptive start-stop battery circuit as described in claim 1, characterized in that: The start / stop switch unit includes a first start / stop switch transistor and a sixth start / stop resistor. The first end of the sixth start / stop resistor is connected to the control terminal of the start / stop switch unit, and the second end of the sixth start / stop resistor is connected to the base of the first start / stop switch transistor. The emitter and collector of the first start / stop switch transistor are respectively connected to the input terminal and the output terminal of the start / stop switch unit.

5. The adaptive start-stop battery circuit as described in claim 1, characterized in that: The battery identification unit further includes a first identification capacitor, the first end of which is connected to the reference terminal of the first voltage reference chip, and the second end of which is grounded.

6. The adaptive start-stop battery circuit as described in claim 1, characterized in that: The battery start-stop unit also includes a first start-stop capacitor, the first end of which is connected to the reference terminal of the second voltage reference chip, and the second end of which is grounded.

7. The adaptive start-stop battery circuit as described in claim 1, characterized in that: The unidirectional output unit includes a first diode, the positive and negative terminals of which are respectively connected to the output terminal of the battery start-stop unit of each battery start-stop identification circuit and the output terminal of the battery start-stop identification circuit.

8. The adaptive start-stop battery circuit as described in claim 1, characterized in that: It also includes a power generation switch circuit; the input terminal of the power generation switch circuit is used to receive the power generation enable signal, and the power generation switch circuit outputs a low-level signal when the power generation enable signal is valid; Each battery start-stop identification circuit's battery start-stop unit also includes a threshold adjustment unit. The first parallel terminal of the threshold adjustment unit of the battery start-stop unit is connected to the first terminal of the second start-stop resistor of the battery start-stop unit. The second parallel terminal of the threshold adjustment unit of the battery start-stop unit is connected to the second terminal of the second start-stop resistor of the battery start-stop unit. The control terminal of the threshold adjustment unit of the battery start-stop unit is connected to the output terminal of the generator switch circuit. The threshold adjustment unit includes an adjustment resistor and an adjustment MOS transistor. The first end of the adjustment resistor is connected to the first parallel terminal of the threshold adjustment unit, the second end of the adjustment resistor is connected to the drain of the adjustment MOS transistor, the source of the adjustment MOS transistor is connected to the second parallel terminal of the threshold adjustment unit, and the gate of the adjustment MOS transistor is connected to the control terminal of the threshold adjustment unit.

9. The adaptive start-stop battery circuit as described in claim 8, characterized in that: The power generation switch circuit includes a first power generation switch resistor, a second power generation switch resistor, a third power generation switch resistor, a fourth power generation switch resistor, and a first power generation transistor; the first end of the first power generation switch resistor is connected to the input end of the power generation switch circuit, the second end of the first power generation switch resistor and the first end of the second power generation switch resistor are connected to the base of the first power generation transistor, the collector of the first power generation transistor, the first end of the third power generation switch resistor and the first end of the fourth power generation switch resistor are connected to the output end of the power generation switch circuit, the emitter of the first power generation transistor, the second end of the second power generation switch resistor and the second end of the fourth power generation switch resistor are grounded, and the second end of the third power generation switch resistor is connected to the battery connection port; The power generation enable signal is active high.

10. The adaptive start-stop battery circuit as described in claim 9, characterized in that: The power generation switching circuit also includes a first power generation Zener diode, the negative terminal of which is connected to the collector of a first power generation transistor, and the positive terminal of which is grounded.

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