Integrated service digital network application circuit

Abstract

The utility model discloses an integrated service digital network application circuit, which comprises an integrated chip module, an integrated service digital network expansion circuit module, an integrated service digital network transmitting module, an integrated service digital network receiving module and an awakening module, the integrated chip module is in signal connection with the integrated digital network expansion circuit module, the discharging control module, the charging control module, the integrated digital network sending module, the integrated digital network receiving module and the wake-up module. And the integrated service digital network expansion circuit module is connected in parallel with two ends of the discharge control module and is used for keeping communication with an external controller or instrument when the battery is over-discharged and the discharge control module stops working. The integrated service digital network sending module is used for sending the SOC electric quantity and the fault code to the controller or the instrument. The integrated services digital network receiving module is used for receiving information sent by external detection equipment. The awakening module is used for awakening the integrated chip module. A control circuit is connected in parallel with two ends of the discharge control module to realize communication maintenance with an instrument.

Description

Technical Field

[0001] The utility model relates to the technical field of battery management, in particular to a one-line application circuit. Background Art

[0002] In recent years, with the introduction of the new national standard for electric bicycles, lithium-ion batteries have a tendency to replace lead-acid batteries due to their light weight, high energy density and long life. In the existing technology, there are two ways to display the power or fault code of the electric bicycle instrument on the market. One is that the instrument reads the total voltage of the lithium battery to display the power grid and fault code; the other is that the instrument reads the SOC power and fault code uploaded by the lithium battery protection board BMS through the one-line interface for digital display. However, when the battery triggers discharge overcurrent, overtemperature, undervoltage and other protections, the discharge MOS will be disconnected, resulting in the instrument being unable to display faults and SOC, etc., making it impossible for maintenance personnel to effectively find the cause, which brings trouble to product analysis. Utility Model Content

[0003] In order to overcome the above disadvantages, the purpose of the present invention is to provide a one-line application circuit to solve the problems raised in the above background technology.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is a one-line application circuit, which is applied to an electric bicycle, the electric bicycle includes a battery, a discharge control module and a charging control module, the discharge control module and the charging control module are connected in series to the negative electrode P- of the battery output. The one-line application circuit includes an integrated chip module, a one-line expansion circuit module, a one-line sending module, a one-line receiving module and a wake-up module, wherein:

[0005] The integrated chip module is signal-connected to the one-line expansion circuit module, the discharge control module, the charging control module, the one-line transmission module, the one-line reception module and the wake-up module. The one-line expansion circuit module is connected in parallel to both ends of the discharge control module, and is used to maintain communication with an external controller or instrument when the battery is over-discharged and the discharge control module stops working. The one-line transmission module is used to send SOC power and fault codes to the controller or instrument. The one-line reception module is used to receive information sent by an external detection device. The wake-up module is used to wake up the integrated chip module.

[0006] Preferably, the integrated chip module is a control chip IC1, and the control chip IC1 includes an RXD signal port, a TXD port, a COM_EN port, a WAKE port, a DSG port and a CHG port.

[0007] Preferably, the one-line receiving module includes a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a transistor Q1, a transistor Q2 and a diode D1. The emitter of the transistor Q1 is connected to a high level VDD, the collector is connected in series with the resistor R5 to ground, and the base is connected to one end of the resistor R2. One end of the resistor R3 is connected to the node between the resistor R5 and the collector of the transistor Q1, and the other end is used to generate an RXD signal output. The resistor R1 is connected in parallel between the emitter and the base of the transistor Q1. The collector of the transistor Q2 is connected to the other end of the resistor R2, the emitter is connected to the battery output negative electrode P-, and the base is connected to one end of the resistor R4. The other end of the resistor R4 is connected to the negative end of the diode D1, and the positive end of the diode D1 is used to receive the COM signal input and is connected to an external instrument or detection equipment.

[0008] Preferably, the one-line transmission module includes a resistor R8, a resistor R9, a resistor R10, a resistor R12, a transistor Q3, a transistor Q4 and a diode D2. The emitter of the transistor Q4 is connected to a high level VDD, the base is connected to one end of the resistor R12, and the collector is connected to the positive end of the diode D2. The other end of the resistor R12 is used to receive a TXD signal input. The negative end of the diode D2 is connected to one end of the resistor R8. The base of the transistor Q3 is connected to the other end of the resistor R8, the collector is connected to the positive end of the diode D1, and the emitter is grounded. The resistor R9 is connected in parallel between the emitter and base of the transistor Q4. The resistor R10 is connected in parallel between the emitter and base of the transistor Q3.

[0009] Preferably, the discharge control module includes a diode D5, a resistor R17, a resistor R14, and a field effect transistor Q6. The source of the field effect transistor Q6 is connected to the negative electrode P- of the battery output, and the gate is connected to one end of the resistor R14. The other end of the resistor R14 is used to receive the DSG signal input. The diode D5 and the resistor R17 are both connected in parallel between the source of the field effect transistor Q6 and the other end of the resistor R14.

[0010] Preferably, the charging control module includes: a diode D4, a resistor R15, a resistor R16 and a field effect transistor Q7. The drain of the field effect transistor Q7 is connected to the drain of the field effect transistor Q6, and the gate is connected to one end of the resistor R15. The other end of the resistor R15 is used to receive a CHG signal input. The diode D4 and the resistor R16 are both connected in parallel between the source of the field effect transistor Q7 and the other end of the resistor R15.

[0011] Preferably, the one-line expansion circuit module includes a diode D3, a resistor R7, a resistor R11, a resistor R13 and a field effect transistor Q5. The source of the field effect transistor Q5 is connected to the source of the field effect transistor Q6, the drain is connected in series with the resistor R13 connected to the drain of the field effect transistor Q6, and the gate is connected to one end of the resistor R7. The resistor R11 is connected in parallel between the source and the gate of the field effect transistor Q6. The other end of the resistor R7 is connected to the cathode end of the diode D3, and the anode end of the diode D3 is used to receive the COM_EN signal input.

[0012] Preferably, the wake-up module includes a resistor R18, a resistor R19, a resistor R20, a resistor R21, a diode D6 and a transistor Q8. The collector of the transistor Q8 is connected in series with the resistor R18 to access the high level VDD, the emitter is grounded, and the base is connected to one end of the resistor R20. One end of the resistor R19 is connected to the node between the resistor R18 and the collector of the transistor Q8, and the other end is used to generate an RXD output. The other end of the resistor R20 is connected to the negative terminal of the diode D6, and the positive terminal of the diode D6 is used to receive the INT signal input. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A circuit diagram of an embodiment of a one-line application circuit of the utility model;

[0014] In the figure:

[0015] Integrated chip module-100; one-line extension circuit module-200; discharge control module-300; charging control module-400; one-line sending module-500; one-line receiving module-600; wake-up module-700. DETAILED DESCRIPTION

[0016] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0017] refer to Figure 1 , Figure 1 A circuit diagram of a one-line application circuit provided by an embodiment of the utility model is shown.

[0018] like Figure 1As shown, the technical solution provided by the present application is a one-line application circuit, which is applied to an electric bicycle. The electric bicycle includes a battery, a discharge control module 300 and a charging control module 400. The discharge control module 300 and the charging control module 400 are connected in series to the negative electrode P- of the battery output. The one-line application circuit includes an integrated chip module 100, a one-line expansion circuit module 200, a one-line sending module 500, a one-line receiving module 600 and a wake-up module 700, wherein:

[0019] The integrated chip module 100 is signal-connected to the one-line extension circuit module 200, the discharge control module 300, the charging control module 400, the one-line transmission module 500, the one-line receiving module 600 and the wake-up module 700. The one-line extension circuit module 200 is connected in parallel to both ends of the discharge control module 300, and is used to maintain communication with an external controller or instrument when the battery is over-discharged and the discharge control module 300 stops working. The one-line transmission module 500 is used to send SOC power and fault codes to the controller or instrument. The one-line receiving module 600 is used to receive information sent by an external detection device. The wake-up module 700 is used to wake up the integrated chip module.

[0020] The application provides a one-line application circuit. The BMS architecture of a lithium battery electric bicycle controls whether the battery is outputting or charging by connecting a charging MOS and a discharging MOS in series to form a loop, and the one-line COM interface refers to the negative electrode P- of the battery output. During normal use, the charging and discharging MOS are in a closed state and establish communication with the controller or instrument; but when the battery is over-discharged, the discharging MOS will be disconnected and the communication will also be randomly disconnected. A control circuit is connected in parallel at both ends of the discharging MOS to maintain communication.

[0021] In some embodiments, reference Figure 1 The integrated chip module is a control chip IC1, and the control chip IC1 includes an RXD signal port, a TXD port, a COM_EN port, a WAKE port, a DSG port and a CHG port.

[0022] In some embodiments, reference Figure 1, the one-line receiving module 600 includes a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a transistor Q1, a transistor Q2 and a diode D1. The emitter of the transistor Q1 is connected to a high level VDD, the collector is connected in series with a resistor R5 to ground, and the base is connected to one end of the resistor R2. One end of the resistor R3 is connected to the node between the resistor R5 and the collector of the transistor Q1, and the other end is used to generate an RXD signal output. The resistor R1 is connected in parallel between the emitter and the base of the transistor Q1. The collector of the transistor Q2 is connected to the other end of the resistor R2, the emitter is connected to the battery output negative electrode P-, and the base is connected to one end of the resistor R4. The other end of the resistor R4 is connected to the negative end of the diode D1, and the positive end of the diode D1 is used to receive the COM signal input and is connected to an external instrument or detection equipment.

[0023] Exemplarily, the one-line receiving module 600 provides a signal to the RXD of the integrated chip module 100 by receiving the COM signal input. When the integrated chip module 100 receives the RXD signal, the TXD signal sending of the one-line sending module 500 is started. This function is limited to after-sales maintenance personnel sending information through detection equipment.

[0024] In some embodiments, reference Figure 1 , the one-line sending module 500 includes: a resistor R8, a resistor R9, a resistor R10, a resistor R12, a transistor Q3, a transistor Q4 and a diode D2. The emitter of the transistor Q4 is connected to the high level VDD, the base is connected to one end of the resistor R12, and the collector is connected to the positive end of the diode D2. The other end of the resistor R12 is used to receive the TXD signal input. The negative end of the diode D2 is connected to one end of the resistor R8. The base of the transistor Q3 is connected to the other end of the resistor R8, the collector is connected to the positive end of the diode D1, and the emitter is grounded. The resistor R9 is connected in parallel between the emitter and the base of the transistor Q4. The resistor R10 is connected in parallel between the emitter and the base of the transistor Q3.

[0025] Exemplarily, the TXD signal of the integrated chip module 100 is sent. When the lithium battery is connected to the vehicle, the one-line sending module 500 sends the SOC power and fault code to the instrument or detection equipment through the TXD signal.

[0026] In some embodiments, reference Figure 1 The discharge control module 300 includes a diode D5, a resistor R17, a resistor R14, and a field effect transistor Q6. The source of the field effect transistor Q6 is connected to the negative electrode P- of the battery output, and the gate is connected to one end of the resistor R14. The other end of the resistor R14 is used to receive the DSG signal input. The diode D5 and the resistor R17 are both connected in parallel between the source of the field effect transistor Q6 and the other end of the resistor R14.

[0027] Exemplarily, when the battery has no discharge fault, the DSG signal port of the integrated chip module 100 of the discharge control module 300 outputs a high level, so that the discharge MOS of the field effect tube Q6 is closed, the loop is turned on, and the discharge action is performed.

[0028] In some embodiments, reference Figure 1 The charging control module 400 includes a diode D4, a resistor R15, a resistor R16 and a field effect transistor Q7. The drain of the field effect transistor Q7 is connected to the drain of the field effect transistor Q6, and the gate is connected to one end of the resistor R15. The other end of the resistor R15 is used to receive the CHG signal input. The diode D4 and the resistor R16 are both connected in parallel between the source of the field effect transistor Q7 and the other end of the resistor R15.

[0029] Exemplarily, when the battery has no charging fault, the CHG signal port of the integrated chip module 100 of the charging control module 400 outputs a high level, so that the charging MOS of the field effect transistor Q7 is closed, the loop is turned on, and the charging action is performed.

[0030] In some embodiments, reference Figure 1 The one-line extension circuit module 200 includes a diode D3, a resistor R7, a resistor R11, a resistor R13 and a field effect transistor Q5. The source of the field effect transistor Q5 is connected to the source of the field effect transistor Q6, the drain series resistor R13 is connected to the drain of the field effect transistor Q6, and the gate is connected to one end of the resistor R7. The resistor R11 is connected in parallel between the source and the gate of the field effect transistor Q6. The other end of the resistor R7 is connected to the negative terminal of the diode D3, and the positive terminal of the diode D3 is used to receive the COM_EN signal input.

[0031] Exemplarily, when Q6 of the discharge control module 300 is disconnected, the one-line expansion circuit module 200 is connected to the integrated chip module 100 through the WAKE signal of the wake-up module 700. After receiving the signal, the integrated chip module 100 outputs a COM_EN signal to control the closed loop of the field effect tube Q5 to be turned on.

[0032] In some embodiments, reference Figure 1 , the wake-up module 700 includes a resistor R18, a resistor R19, a resistor R20, a resistor R21, a diode D6 and a transistor Q8. The collector of the transistor Q8 is connected in series with the resistor R18 to the high level VDD, the emitter is grounded, and the base is connected to one end of the resistor R20. One end of the resistor R19 is connected to the node between the resistor R18 and the collector of the transistor Q8, and the other end is used to generate the RXD output. The other end of the resistor R20 is connected to the negative terminal of the diode D6, and the positive terminal of the diode D6 is used to receive the INT signal input.

[0033] Exemplarily, when the external signal INT of the wake-up module 700 is connected to a high level, the wake-up module 700 works effectively and provides a signal to the WAKE signal port of the integrated chip module 100 .

[0034] In some embodiments, the normal working process of the lithium battery protection board BMS is as follows:

[0035] After the lithium battery is installed on the vehicle and the BMS has no faults, the BMS control chip IC1 outputs a DSG high-level signal to close the field effect transistor Q6, and the discharge circuit is turned on; the BMS control chip C1 outputs a CHG high-level signal to close the field effect transistor Q7, and the charging circuit is turned on; the battery outputs a voltage to the outside to power the controller or instrument; the control chip IC1 sends the SOC and fault code to the instrument through the TXD signal.

[0036] In some embodiments, the lithium battery protection board BMS battery discharge failure process is as follows:

[0037] The battery has some kind of fault during the operation of the vehicle; the BMS control chip C1 outputs a DSG low-level signal due to discharge overcurrent, undervoltage, etc., disconnecting the field effect transistor Q6, and the discharge circuit is disconnected; the BMS control chip C1 outputs a CHG high-level signal to close the field effect transistor Q7, and the charging circuit is turned on; the battery is disconnected from the outside, and the controller or instrument does not work; IC1 stops sending SOC and fault codes to the instrument through the TXD signal.

[0038] In some embodiments, the process of connecting the detection device under battery discharge failure is as follows:

[0039] The battery enters a discharge fault state; the control chip C1 of the BMS outputs a DSG low-level signal, disconnects the field effect tube Q6, and disconnects the discharge circuit; inserts the detection device to the battery, the INT signal is valid, and it is determined to be in detection mode; the control chip C1 of the BMS outputs a COM_EN high-level signal, closes the field effect tube Q5, and the one-line extension circuit is turned on; the control chip IC1 receives the query command of the detection device through TXD; the control chip IC1 sends battery-related information to the detection device through the TXD signal; removes the detection device, the INT signal is low; the MAKE signal received by the BMS is invalid and exits the detection mode; the C1 of the BMS outputs a COM_EN low-level signal, disconnects the field effect tube Q5, and the one-line extension circuit is disconnected.

[0040] The above implementation modes are only for illustrating the technical concept and features of the utility model, and their purpose is to allow people familiar with this technology to understand the content of the utility model and implement it. It cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A one-line application circuit, applied to an electric bicycle, the electric bicycle comprises a battery, a discharge control module and a charge control module, the discharge control module and the charge control module are connected in series to the battery output negative electrode P-, characterized in that: It includes an integrated chip module, a one-line expansion circuit module, a one-line sending module, a one-line receiving module and a wake-up module, wherein: The integrated chip module is signal-connected to the one-line expansion circuit module, the discharge control module, the charging control module, the one-line sending module, the one-line receiving module and the wake-up module; The one-line expansion circuit module is connected in parallel to both ends of the discharge control module, and is used to maintain communication with an external controller or instrument when the battery is over-discharged and the discharge control module stops working; The one-line sending module is used to send the SOC power and fault code to the controller or instrument; The one-line receiving module is used to receive information sent by an external detection device; The wake-up module is used to wake up the integrated chip module.

2. The one-line application circuit according to claim 1, characterized in that: The integrated chip module is a control chip IC1, and the control chip IC1 includes an RXD signal port, a TXD port, a COM_EN port, a WAKE port, a DSG port and a CHG port.

3. The one-line application circuit according to claim 2, characterized in that: The one-line receiving module includes a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a transistor Q1, a transistor Q2 and a diode D1; the emitter of the transistor Q1 is connected to a high level VDD, the collector is connected in series with the resistor R5 to be grounded, and the base is connected to one end of the resistor R2; one end of the resistor R3 is connected to the node between the resistor R5 and the collector of the transistor Q1, and the other end is used to generate an RXD signal output; the resistor R1 is connected in parallel between the emitter and the base of the transistor Q1; the collector of the transistor Q2 is connected to the other end of the resistor R2, the emitter is connected to the battery output negative electrode P-, and the base is connected to one end of the resistor R4; the other end of the resistor R4 is connected to the negative end of the diode D1, and the positive end of the diode D1 is used to receive the COM signal input and is connected to an external instrument or detection equipment.

4. The one-line application circuit according to claim 2, characterized in that: The one-line sending module includes a resistor R8, a resistor R9, a resistor R10, a resistor R12, a transistor Q3, a transistor Q4 and a diode D2; the emitter of the transistor Q4 is connected to a high level VDD, the base is connected to one end of the resistor R12, and the collector is connected to the positive end of the diode D2; the other end of the resistor R12 is used to receive a TXD signal input; the negative end of the diode D2 is connected to one end of the resistor R8; the base of the transistor Q3 is connected to the other end of the resistor R8, the collector is connected to the positive end of the diode D1, and the emitter is grounded; the resistor R9 is connected in parallel between the emitter and the base of the transistor Q4; the resistor R10 is connected in parallel between the emitter and the base of the transistor Q3.

5. The one-line application circuit according to claim 2, characterized in that: The discharge control module includes a diode D5, a resistor R17, a resistor R14, and a field effect transistor Q6; the source of the field effect transistor Q6 is connected to the battery output negative electrode P-, and the gate is connected to one end of the resistor R14; the other end of the resistor R14 is used to receive the DSG signal input; the diode D5 and the resistor R17 are both connected in parallel between the source of the field effect transistor Q6 and the other end of the resistor R14.

6. The one-line application circuit according to claim 5, characterized in that: The charging control module includes a diode D4, a resistor R15, a resistor R16 and a field effect transistor Q7; the drain of the field effect transistor Q7 is connected to the drain of the field effect transistor Q6, and the gate is connected to one end of the resistor R15; the other end of the resistor R15 is used to receive a CHG signal input; the diode D4 and the resistor R16 are both connected in parallel between the source of the field effect transistor Q7 and the other end of the resistor R15.

7. The one-line application circuit according to claim 6, characterized in that: The one-line expansion circuit module includes a diode D3, a resistor R7, a resistor R11, a resistor R13 and a field effect transistor Q5; the source of the field effect transistor Q5 is connected to the source of the field effect transistor Q6, the drain is connected in series with the resistor R13 and connected to the drain of the field effect transistor Q6, and the gate is connected to one end of the resistor R7; the resistor R11 is connected in parallel between the source and the gate of the field effect transistor Q6; the other end of the resistor R7 is connected to the cathode end of the diode D3, and the anode end of the diode D3 is used to receive the COM_EN signal input.

8. The one-line application circuit according to claim 2, characterized in that: The wake-up module includes resistor R18, resistor R19, resistor R20, resistor R21, diode D6 and transistor Q8; the collector of the transistor Q8 is connected in series with the resistor R18 to access the high level VDD, the emitter is grounded, and the base is connected to one end of the resistor R20; one end of the resistor R19 is connected to the node between the resistor R18 and the collector of the transistor Q8, and the other end is used to generate an RXD output; the other end of the resistor R20 is connected to the negative end of the diode D6, and the positive end of the diode D6 is used to receive the INT signal input.

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