CN214045617U

CN214045617U - Single-wire communication line of new national standard lithium battery

Info

Publication number: CN214045617U
Application number: CN202023006106.2U
Authority: CN
Inventors: 张其华; 李朝政; 赵志锋; 王银银; 李玉康
Original assignee: Hangzhou Serial Technology Co ltd
Current assignee: Hangzhou Serial Technology Co ltd
Priority date: 2020-12-14
Filing date: 2020-12-14
Publication date: 2021-08-24
Anticipated expiration: 2030-12-14

Abstract

The utility model discloses a single line communication circuit of new national standard lithium cell obeys the problem that prior art's communication efficiency is low, easily disturbed, including battery and machine controller, battery and machine controller communicate through a ray of logical interface PWM-TXD connection, and the battery includes battery positive pole P +, battery negative pole P-, transmitting circuit and receiving circuit, and transmitting circuit and receiving circuit are connected with machine controller through a ray of logical interface PWM-TXD. The utility model discloses realize battery and machine controller's both way communication on one-way a ray of basis, increase a receiving circuit at the battery protection shield and realize one-way communication and the compatible function of both way communication, utilize this two-way single line communication to acquire more battery information, the performance state of battery is accurately judged, improves production efficiency, utilizes both way communication can maintain fast and repair the battery.

Description

Single-wire communication line of new national standard lithium battery

Technical Field

The utility model belongs to the technical field of the communication technology and specifically relates to a single line communication line of new national standard lithium cell that communication efficiency is high, interference killing feature is strong is related to.

Background

A one-wire communication mode, namely single-wire unidirectional communication, is mainly adopted between the new national standard lithium battery and the motor controller, the communication between the battery and the controller can be realized only by one transmission line, the battery of the electric vehicle is a sender, and the motor controller is a receiver. The communication mode of adopting a unified network has the advantages that the interface circuit is universal and simple, most old national standard vehicle types on the market can be compatible, and the communication mode is very simple even if the old national standard vehicle types are not compatible and transformed, so that the new national standard vehicle adopts the communication mode. Because the battery and the controller are in one-way single-wire communication, the following defects exist: the rate of the communication mode of the wire harness is not very high, the communication efficiency is low, so only a small amount of battery information can be transmitted during communication, the communication is easy to be interfered, the condition of high error rate exists, because the bidirectional communication is not adopted, the effective interactive communication can not be carried out, the information sent by the battery can not know whether the controller receives the information, and meanwhile, the controller can not send any information to the battery.

Disclosure of Invention

The utility model relates to an overcome prior art's communication efficiency low, the problem of easily receiving the interference, provide a single line communication line of new national standard lithium cell, the utility model discloses communication efficiency is high under the condition of equal cost, and the bit error rate is low, and the interference killing feature is strong.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a single-wire communication line of a new national standard lithium battery comprises a battery and a motor controller, wherein the battery and the motor controller are connected and communicated through a one-wire communication interface PWM-TXD, the battery comprises a battery anode P +, a battery cathode P-, a transmitting circuit and a receiving circuit, and the transmitting circuit and the receiving circuit are connected with the motor controller through the one-wire communication interface PWM-TXD.

The utility model discloses realize battery and machine controller's sequence concept strand communication on one-way a ray of basis, increase a receiving circuit at the battery protection board and realize one-way communication and two-way communication compatible function, utilize this two-way single line communication to acquire more battery information, so that the performance status of accurate judgement battery, improve production efficiency, in the after-sales maintenance process of battery need these battery information to judge the user state and the fault information of battery equally, utilize this two-way communication can maintain the repair battery fast.

Under the condition that does not increase the cost and change the circuit, motor controller can acquire more battery information to can carry out effectual interaction with the battery, the battery protection shield with can in time know the operational aspect of motor, provide the solution for more intelligent and high-end electric bicycle.

Preferably, the receiving circuit comprises a resistor R12, a resistor R15, a resistor R17, a resistor R19, a diode D6 and a field-effect tube Q5, the receiving circuit adopts a 3.3V power supply, the power supply is connected with 3.3V and one end of a resistor R12, the other end of the resistor R12 is respectively connected with an RXD end of the receiving circuit and an anode of the diode D6, a cathode of a diode D6 is connected with one end of the resistor R17, the other end of the resistor R17 is connected with a drain of the field-effect tube Q5, a grid of the field-effect tube Q5 is respectively connected with one end of the resistor R15 and one end of the resistor R19, the other end of the resistor R15 is connected with a wire-pass interface PWM-TXD, and the other end of the resistor R19 and a source of the field-effect tube are both connected with a cathode P < - > of the battery.

Preferably, the transmitting circuit comprises an optocoupler U3, a resistor R25 and a voltage-regulator diode D7, a power supply 3.3V is connected with the anode of the transmitting end of the optocoupler U3, the cathode of the transmitting end of the optocoupler U3 is connected with one end of a resistor R25, the other end of the resistor R25 is connected with the TXD end of the transmitting circuit, the collector of the receiving end of the optocoupler U3 is respectively connected with one end of the voltage-regulator diode D7 and a wire-through interface PWM-TXD, and the transmitter of the receiving end of the optocoupler U3 is respectively connected with the other end of the voltage-regulator diode D7 and the cathode P-of the battery.

The PWM-TXD is connected to a pull-up circuit of the controller, when the controller does not send a pulse signal, the field effect tube Q5 is in a conducting state, RXD is at a low level at the moment, and when the battery detects that the RXD is always at the low level, the battery considers that the battery enters a one-way communication mode, and one-line transmission of the TXD is started; if the controller sends a pulse signal with a certain frequency, the high-level Q5 is switched on, the low-level Q5 is switched off, RXD can receive the pulse signal with the opposite phase, the motor is considered to enter a two-way communication mode, and the RXD enters a serial port receiving mode to wait for the sending of the host.

Preferably, the motor controller comprises a pull-up circuit, and the one-wire communication interface PWM-TXD is connected with the pull-up circuit of the motor controller.

Preferably, the one-wire-through interface PWM-TXD adopts bidirectional single-wire communication, and the interface uses a single wire for external use.

Preferably, the pull-up circuit includes a power supply, a CPU, and a pull-up resistor.

Therefore, the utility model discloses following beneficial effect has:

1. the utility model discloses realize the both-way communication of battery and machine controller on the basis of one-way one-wire-pass, increase a receiving circuit at the battery protection shield and realize the compatible function of one-way communication and both-way communication, utilize this two-way single-wire communication to acquire more battery information, so that the performance status of accurate judgement battery, improve production efficiency, need these battery information to judge the user state and the fault information of battery equally in the after-sales maintenance process of battery, utilize this both-way communication can maintain the battery fast;

2. under the condition that does not increase the cost and change the circuit, motor controller can acquire more battery information to can carry out effectual interaction with the battery, the battery protection shield with can in time know the operational aspect of motor, provide the solution for more intelligent and high-end electric bicycle.

Drawings

Fig. 1 is a schematic structural diagram of the present embodiment.

Fig. 2 is a circuit diagram of the battery of the present embodiment.

In the figure: 1. battery 11, receiving circuit 12, transmitting circuit 2, motor controller.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description.

The embodiment provides a single-wire communication line of a new national standard lithium battery, as shown in fig. 1, the single-wire communication line comprises a battery 1 and a motor controller 2, the battery and the motor controller are connected and communicated through a wire-through interface PWM-TXD, the battery comprises a battery anode P +, a battery cathode P-, a transmitting circuit and a receiving circuit 11, and the transmitting circuit 12 and the receiving circuit are connected with the motor controller through the wire-through interface PWM-TXD.

As shown in fig. 2, the receiving circuit 11 includes a resistor R12, a resistor R15, a resistor R17, a resistor R19, a diode D6 and a fet Q5, the receiving circuit uses a 3.3V power supply, the power supply 3.3V is connected to one end of the resistor R12, the other end of the resistor R12 is connected to the RXD terminal of the receiving circuit and the anode of the diode D6, the cathode of the diode D6 is connected to one end of the resistor R17, the other end of the resistor R17 is connected to the drain of the fet Q5, the gate of the fet Q5 is connected to one end of the resistor R15 and one end of the resistor R19, the other end of the resistor R15 is connected to a wire-to the PWM-TXD interface, and the other end of the resistor R19 and the source of the fet are both connected to the cathode P-of the battery.

The transmitting circuit 12 comprises an optocoupler U3, a resistor R25 and a voltage-regulator diode D7, a power supply 3.3V is connected with the anode of the transmitting end of the optocoupler U3, the cathode of the transmitting end of the optocoupler U3 is connected with one end of a resistor R25, the other end of the resistor R25 is connected with the TXD end of the transmitting circuit, the collector of the receiving end of the optocoupler U3 is connected with one end of the voltage-regulator diode D7 and a wire-through interface PWM-TXD respectively, and the transmitter of the receiving end of the optocoupler U3 is connected with the other end of the voltage-regulator diode D7 and the cathode P-of the battery respectively.

The motor controller comprises a pull-up circuit, a one-wire connection interface PWM-TXD is connected with the pull-up circuit of the motor controller, the one-wire connection interface PWM-TXD adopts bidirectional single-wire communication, a single wire is used for the interface, the pull-up circuit comprises a power supply, a CPU and a pull-up resistor, and the pull-up resistor adopts a 2k omega resistor.

The utility model discloses the working process is as follows: the PWM-TXD is connected to a pull-up circuit of the controller, when the controller does not send a pulse signal, the field effect tube Q5 is in a conducting state, RXD is at a low level at the moment, and when the battery detects that the RXD is always at the low level, the battery considers that the battery enters a one-way communication mode, and one-line transmission of the TXD is started; if the controller sends a pulse signal with a certain frequency, the high-level Q5 is switched on, the low-level Q5 is switched off, RXD can receive the pulse signal with the opposite phase, the motor is considered to enter a two-way communication mode, and the RXD enters a serial port receiving mode to wait for the sending of the host.

The battery protection board is additionally provided with the receiving circuit to realize the compatibility of one-way communication and two-way communication, more battery information is acquired by utilizing the two-way single-wire communication, so that the performance state of the battery can be accurately judged, the production efficiency is improved, the service state and the fault information of the battery can be judged by using the battery information in the after-sale maintenance process of the battery, and the battery can be quickly maintained and repaired by utilizing the two-way communication.

The above embodiments are only used for further explanation of the present invention, and it is not understood that the present invention is limited by the protection scope of the present invention, and the technical engineers in the field are right according to the above contents of the present invention.

Claims

1. A single-wire communication line of a new national standard lithium battery comprises a battery and a motor controller and is characterized in that the battery and the motor controller are connected and communicated through a one-wire interface PWM-TXD, the battery comprises a battery anode P +, a battery cathode P-, a transmitting circuit and a receiving circuit, and the transmitting circuit and the receiving circuit are connected with the motor controller through the one-wire interface PWM-TXD.

2. The single-wire communication line of the new national-standard lithium battery as claimed in claim 1, wherein the receiving circuit comprises a resistor R12, a resistor R15, a resistor R17, a resistor R19, a diode D6 and a field-effect tube Q5, the receiving circuit adopts a 3.3V power supply, the power supply is connected with one end of a resistor R12 at 3.3V, the other end of the resistor R12 is respectively connected with the RXD end of the receiving circuit and the anode of the diode D6, the cathode of the diode D6 is connected with one end of the resistor R17, the other end of the resistor R17 is connected with the drain of the field-effect tube Q5, the grid of the field-effect tube Q5 is respectively connected with one end of the resistor R15 and one end of the resistor R19, the other end of the resistor R15 is connected with a wire-through interface PWM-TXD, and the other end of the resistor R19 and the source of the field-effect tube are both connected with the cathode P-.

3. The single-wire communication circuit of the new national standard lithium battery as claimed in claim 1, wherein the transmitting circuit comprises an optocoupler U3, a resistor R25 and a zener diode D7, a power supply 3.3V is connected with the anode of the transmitting end of the optocoupler U3, the cathode of the transmitting end of the optocoupler U3 is connected with one end of a resistor R25, the other end of the resistor R25 is connected with the TXD end of the transmitting circuit, the collector of the receiving end of the optocoupler U3 is respectively connected with one end of the zener diode D7 and a one-wire interface PWM-TXD, and the transmitter of the receiving end of the optocoupler U3 is respectively connected with the other end of the zener diode D7 and the cathode P-of the battery.

4. The single-wire communication line of a new national-standard lithium battery as claimed in claim 1, wherein the motor controller comprises a pull-up circuit, and a wire-through interface PWM-TXD is connected with the pull-up circuit of the motor controller.

5. A single-wire communication line of a new national standard lithium battery as claimed in claim 1, 2, 3 or 4, wherein a single-wire interface PWM-TXD adopts bidirectional single-wire communication, and a single wire is used for the interface.

6. The single-wire communication line of a new national-standard lithium battery as claimed in claim 4, wherein the pull-up circuit comprises a power supply, a CPU and a pull-up resistor.