CN206908325U - It is a kind of that system is protected by light-coupled isolation software and hardware cooperating novel lithium battery group - Google Patents

Abstract

System is protected by light-coupled isolation software and hardware cooperating novel lithium battery group the utility model discloses one kind,Including microcontroller and electric power detection module,The data terminal of the microcontroller is connected with the control port of electric power detection module,The AD collection pins of the microcontroller also electrically connect lithium battery group,The output end of the microcontroller is connected with battery privacy protection chip,The output end of the microcontroller is also connected by its internal CAN with computer,The output end of the microcontroller is also associated with human-computer interaction module,The input of the electric power detection module also electrically connect Hall current detection module,Battery voltage is gathered using the technology of light-coupled isolation,While accurate collection battery information,Ensure system worked well operation,Software detection battery status is realized by the thinking of software and hardware combining,Software and hardware mating protection lithium electricity group charging/discharging function.

Description

A new type of lithium battery group protection system that works together through optocoupler isolation software and hardware

technical field

The utility model relates to the technical field of lithium battery group protection systems, in particular to a new type of lithium battery group protection system working in cooperation with optical coupler isolation software and hardware.

Background technique

In the face of severe changes in the global climate, pure electric vehicles have become the main direction of the future development of the automobile industry, and the main factor affecting the development of electric vehicles is the lithium battery as its power source. In order to ensure the safe, stable and normal operation of electric vehicles, it is necessary to control and manage the battery so that it can maintain good performance and extend its service life. Therefore, rational use of batteries is very important for electric vehicles. However, obtaining the remaining power of the battery in a timely and accurate manner is the main aspect of controlling and managing the battery. This is because the remaining power of the battery directly reflects the state of the battery, through which the mileage of the electric vehicle can be predicted, overcharge and overdischarge of the battery can be avoided, and the inconsistency between battery performance can be balanced, thus ensuring the safety of the electric vehicle. However, the existing lithium battery protection technology basically adopts the processing scheme of separating software and hardware, which is simple in design, but there are still errors in the detection signal of the hardware circuit, and the BMS system cannot give corresponding troubleshooting prompts. with processing.

Contents of the invention

In order to achieve the above purpose, the utility model provides the following technical solutions: a new type of lithium battery group protection system that works through optocoupler isolation software and hardware, including a microcontroller, the microcontroller is directly powered by a power module, and the microcontroller The data end of the microcontroller is connected to the control port of the power detection module, the AD acquisition pin inside the microcontroller is also electrically connected to the lithium battery pack, the power supply terminal of the microcontroller is electrically connected to the power module, and the microcontroller The output terminal of the microcontroller is connected with the battery-specific protection chip, the output terminal of the microcontroller is also connected with the computer through its internal CAN communication module, and the output terminal of the microcontroller is also connected with the man-machine interaction module. The human-computer interaction module is provided with an OLED liquid crystal screen and a keyboard. The input end of the power detection module is also electrically connected to the Hall current detection module, and the output end of the power detection module is connected to the LED display module.

As a preferred technical solution of the utility model, a voltage conversion circuit and a chip temperature detection circuit are arranged on the periphery of the power detection module.

As a preferred technical solution of the present invention, the Hall current detection module is provided with a NBCZX7-500 DC Hall sensor and a battery discharge current detection circuit, and the input end of the battery discharge current detection circuit is connected to a lithium battery pack. The output terminal of the battery discharge current detection circuit is connected to the DC Hall sensor, and the output terminal of the DC Hall sensor is connected to the signal input terminal of the power detection module.

As a preferred technical solution of the present invention, the input end of the microcontroller is also connected with an external temperature detection module.

Compared with the prior art, the beneficial effect of the utility model is that: the novel lithium battery group protection system working through optocoupler isolation software and hardware is equipped with a microcontroller, and the microcontroller uses MKL26Z256VLL4 single-chip microcomputer as the system chip, and utilizes MKL26Z256VLL4 single-chip microcomputer As a system chip and its peripheral circuits, it cooperates with DS2788 and a dedicated lithium battery protection chip 7276 to combine software and hardware with a lithium battery power management system; adopts optocoupler isolation technology to collect battery pack voltage, accurately collects battery information, and ensures the normal operation of the system. Through the combination of software and hardware, the software detects the battery status, and the software and hardware cooperate to protect the charging and discharging function of the lithium battery pack.

Description of drawings

Fig. 1 is a structural representation of the utility model;

Figure 2 is a schematic diagram of the connection of the electric quantity detection module of the present invention;

Fig. 3 is a circuit diagram of the electricity detection module of the utility model.

In the figure: 1-microcontroller; 2-power supply module; 3-power detection module; 4-lithium battery pack; 5-external temperature detection module; 6-battery special protection chip; 7-CAN communication module; 8-computer; 9-OLED LCD screen; 10-human-computer interaction module; 11-keyboard; 12-voltage conversion circuit; 13-chip temperature detection circuit; 14-Hall current detection module; 15-current detection circuit; 16-DC Hall sensor ; 17-LED display module.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Example:

Please refer to Fig. 1 to Fig. 3. The utility model provides a technical solution: a new type of protection system for lithium battery group working through optocoupler isolation software and hardware, including a microcontroller 1, the microcontroller 1 adopts the main control chip MKL26Z256VLL4 The single-chip microcomputer is used as a system chip, the microcontroller 1 is directly powered by the power supply module 2, the data terminal of the microcontroller 1 is connected with the control port of the power detection module 3, and the AD acquisition pin inside the microcontroller 1 Also electrically connected to the lithium battery pack 4, the power supply terminal of the microcontroller 1 is electrically connected to the power supply module 2, and the output terminal of the microcontroller 1 is connected to the special battery protection chip 6, and the microcontroller 1 The output end is also connected with the computer 8 through its internal CAN communication module 7, and the computer 8 is connected on the single-chip microcomputer module for receiving system detection information and saving information, querying historical information, and the output end of the microcontroller 1 is also Connected with a human-computer interaction module 10, the interior of the human-computer interaction module 10 is provided with an OLED liquid crystal screen 9 and a keyboard 11, which are used to display information and input instructions by controlling the OLED liquid crystal screen 9 and keyboard 11, and the power detection module 3 The input end is also electrically connected to the Hall current detection module 14 , and the output end of the power detection module 3 is connected to the LED display module 17 .

Preferably, the periphery of the power detection module 3 is provided with a voltage conversion circuit 12 and a chip temperature detection circuit 13; the Hall current detection module 14 is provided with a NBCZX7-500 DC Hall sensor 16 and a battery discharge current detection circuit 15. The input end of the battery discharge current detection circuit 15 is connected to the lithium battery pack 4, the output end of the battery discharge current detection circuit 15 is connected to a DC Hall sensor 16, and the output end of the DC Hall sensor 16 is connected to a power detection The signal input end of the module 3; the input end of the micro-controller 1 is also connected with an external temperature detection module 5, and the external temperature detection module 5 is connected to the single-chip microcomputer module to detect the external temperature.

The battery-specific protection chip 6 adopts a 7276 series processing chip. In the battery-specific protection chip 6, when the voltage of any single cell is higher than the preset voltage value, the overcharge protection is activated, with locking and unlocking; when any single cell voltage Start over-discharge protection when the voltage is lower than the preset value, with lock and unlock; start over-current protection when the discharge current is higher than the preset current value, with lock and unlock; send real-time voltage, current, SOC to external receiving equipment , temperature and other parameters; control whether the battery pack has output through an external weak current switch; when the external switch is disconnected, the system sleeps; when the charger is connected, no matter what state the external control switch is in, it cannot discharge but can communicate; the system has built-in work history The records are read for after-sales, etc., to understand the historical usage of the battery pack.

Specific usage and advantages: This new type of protection system for lithium battery packs works through optocoupler isolation software and hardware, including the main control chip MKL26Z256VLL4 single-chip microcomputer as the system chip, and the power detection module. The DS2788 chip is selected in the power detection module. The periphery of the DS2788 chip is equipped with Voltage conversion circuit and chip temperature detection circuit; Hall current detection module, single-chip microcomputer module, LED display module and power module, DS2788 power detection module and Hall current detection module are connected to the lithium battery to detect the power and discharge current of the lithium battery, The signal output terminal of the Hall current detection module is connected to the input terminal of the DS2788 module. The DS2788 power detection module is connected to the single-chip microcomputer module to output detection data to the single-chip microcomputer module. The LED display module is connected to the DS2788 module to display the power current data of the lithium battery. The power module is connected to each electrical module in the management system to provide power support, and supports the MKL26Z256VLL4 single-chip microcomputer as the internal CAN communication function of the system chip to realize the real-time collection of system power information and alarm information and the function of communicating with the outside world, using the MKL26Z256VLL4 single-chip microcomputer as the system chip And its peripheral circuit cooperates with DS2788 and special lithium battery protection chip 7276 to combine software and hardware with lithium battery power management system; adopt optocoupler isolation technology to collect battery pack voltage, accurately collect battery information, and ensure the normal operation of the system. Through software and hardware The combination of ideas realizes the software to detect the battery status, and the software and hardware cooperate to protect the charging and discharging function of the lithium battery pack.

It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, no matter from all points of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, so it is intended to fall within the scope of the claims All changes within the meaning and range of equivalents of the required elements are included in the present invention. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (5)

1. a kind of protect system by light-coupled isolation software and hardware cooperating novel lithium battery group, it is characterised in that：Including microcontroller Device (1), the microcontroller (1) are directly powered by power module (2), and data terminal and the electricity of the microcontroller (1) are examined The control port for surveying module (3) is connected, and the internal AD collection pins of the microcontroller (1) also electrically connect lithium battery group (4), the power end of the microcontroller (1) electrically connect power module (2), the output end and battery of the microcontroller (1) Privacy protection chip (6) is connected, and the output end of the microcontroller (1) also passes through its internal CAN (7) and meter Calculation machine (8) is connected, and the output end of the microcontroller (1) is also associated with human-computer interaction module (10), the man-machine interaction mould Block (10) is internally provided with OLED liquid crystal screen (9) and keyboard (11), and the input of the electric power detection module (3) also electrically connects Hall current detection module (14), the output end of the electric power detection module (3) is connected with LED display module (17).

2. one kind according to claim 1 protects system by light-coupled isolation software and hardware cooperating novel lithium battery group, its It is characterised by：The periphery of the electric power detection module (3) is provided with voltage conversion circuit (12) and chip temperature detection circuit (13).

3. one kind according to claim 1 protects system by light-coupled isolation software and hardware cooperating novel lithium battery group, its It is characterised by：NBCZX7-500 direct currents Hall sensor (16) and battery discharge are provided with the Hall current detection module (14) Current detection circuit (15), the input connection lithium battery group (4) of the battery discharge current detection circuit (15), the battery Discharge current testing circuit (15) output end connection direct current Hall sensor (16), the direct current Hall sensor (16) it is defeated Go out the signal input part of end connection electric power detection module (3).

4. one kind according to claim 1 protects system by light-coupled isolation software and hardware cooperating novel lithium battery group, its It is characterised by：The input of the microcontroller (1) is also associated with external temperature detection module (5).

5. one kind according to claim 1 protects system by light-coupled isolation software and hardware cooperating novel lithium battery group, its It is characterised by：The microcontroller (1) is using main control chip MKL26Z256VLL4 single-chip microcomputers as System on Chip/SoC.