Coulombmeter with multiple communication modes

Abstract

The utility model relates to a coulombmeter with multiple communication modes. The coulombmeter comprises a power supply circuit, an ultra-low power consumption Bluetooth protocol application system circuit, a communication circuit, a sampling circuit, an interface module and a debugging circuit, the communication circuit comprises an integrated service digital network communication circuit and an RS485 communication circuit; and an MCU (Microprogrammed Control Unit) module is arranged in the ultra-low power consumption Bluetooth protocol application system circuit. The beneficial effects of the utility model are that: not only can communication with an electric vehicle central controller without a Bluetooth module be realized through RS485 and an integrated services digital network protocol, but also communication with an electric vehicle central controller with a Bluetooth device can be realized through Bluetooth, and different central controller requirements can be satisfied; through a Bluetooth networking mode, the electric vehicle central controller with a Bluetooth device is further connected with a mobile phone through Bluetooth, and channel reconstruction is not needed; and meanwhile, the electric quantity of the electric vehicle obtained by the Bluetooth central controller can be calibrated, so that the electric quantity displayed by the instrument and the APP is more accurate, and a driver can conveniently and better calculate the rest distance of riding of the electric vehicle.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric vehicle power monitoring, and in particular relates to a coulomb meter with multiple communication modes. Background Art

[0002] At present, the current lead-acid battery power estimation on the market mainly adopts the voltage estimation method, which has a large error. In order to improve the accuracy of lead-acid battery power estimation, the existing technology mostly uses coulomb meters to measure the power of lead-acid batteries, so that drivers can more accurately control the power of electric vehicles and predict the riding distance of electric vehicles.

[0003] However, existing coulomb meters can usually only communicate with the instrument through wired methods (such as 485 / one-line communication), or are independent Bluetooth coulomb meters, which cannot effectively communicate with the entire vehicle, resulting in the instrument being unable to display coulomb meter information and unable to meet the requirements of the intelligent central control system for different communication methods. Utility Model Content

[0004] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a coulomb meter with multiple communication modes.

[0005] The coulomb meter with multiple communication modes includes: an ultra-low power application Bluetooth protocol system circuit, a communication circuit and a sampling circuit; the communication circuit includes a one-line communication circuit and an RS485 communication circuit; an MCU module is arranged in the ultra-low power application Bluetooth protocol system circuit;

[0006] The MCU module is electrically connected to the sampling circuit, the one-line communication circuit and the RS485 communication circuit;

[0007] The MCU module is electrically connected to the electric vehicle central control via the RS485 communication circuit or the one-line communication circuit; the RS485 communication circuit is used to communicate with the electric vehicle central control using the RS485 protocol; the one-line communication circuit is used to communicate with the electric vehicle central control using the one-line protocol;

[0008] The sampling circuit is used to collect the differential voltage across the sampling resistor, perform digital-to-analog conversion, and transmit the voltage information to the MCU module.

[0009] Preferably, an interface module is also provided, which electrically connects the MCU module, the RS485 communication circuit and the one-line circuit and is used for signal exchange between the MCU module and the RS485 communication circuit or the one-line circuit.

[0010] Preferably, a debugging circuit is also provided, which is electrically connected to the MCU module and is used to debug the MCU module.

[0011] Preferably, a power supply circuit is also provided, which is electrically connected to the ultra-low power application Bluetooth protocol system circuit, communication circuit, sampling circuit, interface module and debugging circuit, and is used to power the circuits and modules electrically connected to the power supply circuit after reducing the voltage of the electric vehicle to 5V and 3.3V.

[0012] Preferably, the MCU module is connected to the electric vehicle central control via Bluetooth, the electric vehicle central control is provided with a Bluetooth module, and the electric vehicle central control is connected to the mobile phone via Bluetooth; a Bluetooth network is formed between the MCU module, the mobile phone and the electric vehicle central control.

[0013] Preferably, the sampling circuit uses the TM7707 chip.

[0014] As a preferred embodiment: the MCU module is connected to the electric vehicle central control via Bluetooth. The electric vehicle central control is equipped with a Bluetooth module. The electric vehicle central control is connected to the mobile phone via Bluetooth. The MCU has Bluetooth function and can communicate with the central control with Bluetooth function. A Bluetooth network is formed between the MCU module, the mobile phone and the electric vehicle central control. The electric vehicle power obtained by the Bluetooth central control is calibrated through the Bluetooth networking, so that the power information displayed in the instrument is more accurate, and complicated wiring operations are avoided. Only the positive and negative poles of the battery need to be connected.

[0015] As a preferred option: the sampling circuit uses the TM7707 chip.

[0016] The beneficial effects of the utility model are:

[0017] The coulomb meter with multiple communication modes designed by the utility model can not only communicate with the electric vehicle central control without a Bluetooth module through RS485 and a one-line protocol, but also communicate with the electric vehicle central control with a Bluetooth device through Bluetooth, which can meet the needs of different central control systems; it can also further connect with the mobile phone through Bluetooth through the electric vehicle central control with a Bluetooth device through Bluetooth networking, without rebuilding the channel; it is more convenient to operate, and can also calibrate the electric vehicle power obtained by the Bluetooth central control, so that the power displayed on the instrument and the APP is more accurate, which is convenient for the driver to better calculate the remaining distance that the electric vehicle can ride. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a module diagram of the utility model;

[0019] Figure 2 This is the circuit schematic diagram of the MCU module;

[0020] Figure 3 This is the schematic diagram of the RS485 communication circuit;

[0021] Figure 4 This is the schematic diagram of the AD sampling circuit;

[0022] Figure 5This is the schematic diagram of the one-line communication circuit;

[0023] Figure 6 is the circuit schematic diagram of the interface module;

[0024] Figure 7 This is the schematic diagram of the debugging circuit. DETAILED DESCRIPTION

[0025] The utility model is further described below in conjunction with the embodiments. The description of the following embodiments is only used to help understand the utility model. It should be pointed out that for ordinary people in this technical field, the utility model can also be modified in some ways without departing from the principle of the utility model, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

[0026] Example 1

[0027] like Figures 1 to 5 As shown, in order to enable the coulomb meter to communicate with instruments or central controls using different communication methods and improve the versatility of the coulomb meter, the present application hereby provides a coulomb meter with multiple communication methods, including: an ultra-low power application Bluetooth protocol system circuit, a communication circuit and a sampling circuit; the communication circuit includes a one-line communication circuit and an RS485 communication circuit; an MCU module is provided in the ultra-low power application Bluetooth protocol system circuit;

[0028] The MCU module is electrically connected to the sampling circuit, the one-line communication circuit and the RS485 communication circuit;

[0029] The MCU module is electrically connected to the electric vehicle central control via the RS485 communication circuit or the one-line communication circuit; the RS485 communication circuit is used to communicate with the electric vehicle central control using the RS485 protocol; the one-line communication circuit is used to communicate with the electric vehicle central control using the one-line protocol;

[0030] The sampling circuit is used to collect the differential voltage across the sampling resistor, perform digital-to-analog conversion, and transmit the voltage information to the MCU module.

[0031] Example 2

[0032] like Figure 6 As shown, on the basis of Example 1, an interface module is further provided, which electrically connects the MCU module, the RS485 communication circuit and the one-line circuit, and is used for signal exchange between the MCU module and the RS485 communication circuit or the one-line circuit.

[0033] Example 3

[0034] like Figure 7 As shown, on the basis of embodiment 1, a debugging circuit is further provided, and the debugging circuit is electrically connected to the MCU module for debugging the MCU module.

[0035] Example 4

[0036] On the basis of Example 2 and Example 3, a power supply circuit is also provided. The power supply circuit is electrically connected to the ultra-low power application Bluetooth protocol system circuit, the communication circuit, the sampling circuit, the interface module and the debugging circuit, and is used to reduce the voltage of the electric vehicle to 5V and 3.3V and then power the circuits and modules electrically connected to the power supply circuit.

[0037] Example 5

[0038] like Figures 1 to 7 As shown, a coulomb meter with multiple communication modes includes: a power supply circuit, an ultra-low power application Bluetooth protocol system circuit, a communication circuit, an AD sampling circuit (using the TM7707 chip), an interface module and a debugging circuit; the communication circuit includes a one-line communication circuit and an RS485 communication circuit; the ultra-low power application Bluetooth protocol system circuit is provided with an MCU module;

[0039] The MCU module is electrically connected to the sampling circuit, the one-line communication circuit, the RS485 communication circuit, the interface module and the debugging circuit;

[0040] The power supply circuit is electrically connected to the ultra-low power application Bluetooth protocol system circuit, the communication circuit, the sampling circuit, the interface module and the debugging circuit, and is used to reduce the voltage of the electric vehicle to 5V and 3.3V and then supply power to the circuits and modules electrically connected to the power supply circuit;

[0041] The interface module is electrically connected to the MCU module, the RS485 communication circuit and the one-line circuit, and is used for signal exchange between the MCU module and the RS485 communication circuit or the one-line circuit;

[0042] The MCU module is electrically connected to the electric vehicle central control via an RS485 communication circuit or a one-line communication circuit; the RS485 communication circuit is used to communicate with the electric vehicle central control using the RS485 protocol; the one-line communication circuit is used to communicate with the electric vehicle central control using the one-line protocol; the MCU module is connected to the electric vehicle central control via Bluetooth, the electric vehicle central control is provided with a Bluetooth module, and the electric vehicle central control is connected to the mobile phone via Bluetooth; a Bluetooth network is formed between the MCU module, the mobile phone and the electric vehicle central control;

[0043] The sampling circuit is used to collect the differential voltage across the sampling resistor, perform digital-to-analog conversion, and transmit the voltage information to the MCU module;

[0044] Debug circuit, used to debug the MCU module.

[0045] The coulomb meter with multiple communication modes provided in this embodiment can not only communicate with the electric vehicle central control without a Bluetooth module through RS485 and a one-line protocol, but also communicate with the electric vehicle central control with a Bluetooth device through Bluetooth, which can meet the needs of different central control systems; it can also further connect to the mobile phone through Bluetooth through the electric vehicle central control with a Bluetooth device through Bluetooth networking, without the need to rebuild the channel; it is more convenient to operate, and can also calibrate the electric vehicle power obtained by the Bluetooth central control, so that the power displayed on the instrument and APP is more accurate, which is convenient for the driver to better calculate the remaining distance that the electric vehicle can ride.

[0046] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A coulomb meter with multiple communication modes, characterized in that: include: Ultra-low power application Bluetooth protocol system circuit, communication circuit and sampling circuit; the communication circuit includes a one-line communication circuit and an RS485 communication circuit; the ultra-low power application Bluetooth protocol system circuit is equipped with an MCU module; The MCU module is electrically connected to the sampling circuit, the one-line communication circuit and the RS485 communication circuit; The MCU module is electrically connected to the electric vehicle central control via the RS485 communication circuit or the one-line communication circuit; the RS485 communication circuit is used to communicate with the electric vehicle central control using the RS485 protocol; the one-line communication circuit is used to communicate with the electric vehicle central control using the one-line protocol; The sampling circuit is used to collect the differential voltage across the sampling resistor, perform digital-to-analog conversion, and transmit the voltage information to the MCU module.

2. The coulomb meter with multiple communication modes according to claim 1, characterized in that: An interface module is also provided, which is electrically connected to the MCU module, the RS485 communication circuit and the one-line circuit, and is used for signal exchange between the MCU module and the RS485 communication circuit or the one-line circuit.

3. The coulomb meter with multiple communication modes according to claim 1, characterized in that: A debugging circuit is also provided, which is electrically connected to the MCU module and is used for debugging the MCU module.

4. The coulomb meter with multiple communication modes according to any one of claims 2 or 3, characterized in that: A power supply circuit is also provided, which is electrically connected to the ultra-low power application Bluetooth protocol system circuit, communication circuit, sampling circuit, interface module and debugging circuit, and is used to reduce the voltage of the electric vehicle to 5V and 3.3V and then power the circuits and modules electrically connected to the power supply circuit.

5. The coulomb meter with multiple communication modes according to claim 1, characterized in that: The MCU module is connected to the electric vehicle central control via Bluetooth. The electric vehicle central control is equipped with a Bluetooth module, and the electric vehicle central control is connected to the mobile phone via Bluetooth; a Bluetooth network is formed between the MCU module, the mobile phone and the electric vehicle central control.

6. The coulomb meter with multiple communication modes according to claim 1, characterized in that: The sampling circuit uses the TM7707 chip.

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