CN212136630U

CN212136630U - Lithium battery module equalizing module

Info

Publication number: CN212136630U
Application number: CN202021178998.1U
Authority: CN
Inventors: 冯士欣; 刘扬
Original assignee: Beijing Maishi High Tech Electronic Technology Co ltd
Current assignee: Beijing Maishi High Tech Electronic Technology Co ltd
Priority date: 2020-06-23
Filing date: 2020-06-23
Publication date: 2020-12-11
Anticipated expiration: 2030-06-23

Abstract

The utility model discloses a lithium battery module equalizing module, which comprises a shell, and a high-voltage rectifying module, an equalizing management unit and a control panel which are arranged in the shell, wherein the input end of the high-voltage rectifying module is connected with 220V mains supply, the output end of the high-voltage rectifying module is connected with the input end of the equalizing management unit, the output end of the equalizing management unit is connected with a lithium battery pack, and the equalizing management unit is electrically connected with the control panel; the shell is provided with a display screen connected with the output end of the control panel and a waterproof connector connected with the input end of the control panel. The utility model discloses a gather the parameter of single cell in the lithium cell group, charge to low voltage single cell, discharge high voltage single cell, make it be in best operating condition, the electric quantity of lithium cell group reaches furthest and uses, prolongs the life of lithium cell group.

Description

Lithium battery module equalizing module

Technical Field

The utility model relates to a lithium cell production technical field, especially a lithium cell module equalizing module.

Background

When the lithium battery is applied to the electric automobile, in order to meet the application requirements of the electric automobile, the power battery used on the electric automobile is generally composed of a plurality of single batteries in a series connection and parallel connection mode. Theoretically, the single batteries should have the same characteristics, but at the present manufacturing process level, it is difficult to ensure that the performance of each battery in the battery pack is highly consistent. The complicated operation condition of the electric automobile can lead to inconsistent attenuation and reduction speeds of the single batteries, and further the performance and the service life of the whole battery pack are influenced. How to eliminate the difference of performance between each monomer in the group battery, reduce the nonconformity between each monomer, prolong the life of group battery is the problem that needs to solve now urgently.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that needs to solve provides a balanced module of lithium cell module carries out balanced management to the group battery, makes the voltage between each battery monomer in the group battery tend to unanimously, prolongs the life of lithium cell group.

In order to solve the technical problem, the utility model adopts the following technical proposal.

A lithium battery module equalizing module comprises a shell, a high-voltage rectifying module, an equalizing management unit and a control panel, wherein the high-voltage rectifying module is arranged in the shell and used for rectifying input alternating current, the equalizing management unit is used for performing equalizing management on each single battery in a lithium battery pack, the control panel is used for controlling the equalizing management unit to realize charging and discharging of each single battery in the lithium battery pack, the input end of the high-voltage rectifying module is connected to a mains supply 220V, the output end of the high-voltage rectifying module is connected with the input end of the equalizing management unit, the output end of the equalizing management unit is connected with the lithium battery pack, and the; the shell is provided with a display screen connected with the output end of the control panel and a waterproof connector connected with the input end of the control panel.

The utility model provides an above-mentioned lithium battery module equalizing module, equalizing management unit is including the collection control module who is arranged in gathering each battery cell voltage in the lithium cell group, the constant current voltage limiting module of charging that is arranged in to the battery cell group that the voltage is low, the relay control module who is used for controlling the action of equalizing management unit under the control panel instruction to the module of discharging that is arranged in to the battery cell group, the input of collection control module is connected on the lithium cell group, the output of collection control module is connection control panel respectively, the input of constant current voltage limiting module of charging and the module of discharging, the output of constant current voltage limiting module of charging and the module of discharging is connected on the battery cell through relay control module, the controlled end of relay control module connects the output of collection control module.

In the lithium battery module equalizing module, the input end of the constant-current voltage-limiting charging module is connected with the output end of the high-voltage rectifying module through the DCDC isolating module.

Above-mentioned balanced module of lithium battery module, acquisition control module is including setting up the temperature sensor who is used for detecting the battery temperature in lithium cell group, and acquisition control module's input is connected to temperature sensor's output.

According to the lithium battery module equalizing module, the constant-current voltage-limiting charging module adopts an XL4016E1 chip.

According to the lithium battery module equalizing module, the discharging module adopts an IRFP90N20D power MOS tube.

Above-mentioned balanced module of lithium battery module, be provided with the handle of being convenient for to hand on the casing.

Due to the adoption of the technical scheme, the utility model has the following technical progress.

The utility model discloses a gather the parameter of single cell in the lithium cell group, charge to low voltage single cell, discharge high voltage single cell, make it be in best operating condition, the electric quantity of lithium cell group reaches furthest and uses, prolongs the life of lithium cell group.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a block diagram of the present invention;

fig. 3 is a circuit diagram of the high-voltage rectification module according to the present invention;

fig. 4 is a circuit diagram of a DCDC isolation module according to the present invention;

fig. 5 is a circuit diagram of the constant-current voltage-limiting charging module according to the present invention;

fig. 6 is a circuit diagram of the discharging module and the relay control module according to the present invention;

fig. 7 is a circuit diagram of the acquisition control module according to the present invention;

fig. 8 is a circuit diagram of a control board according to the present invention;

wherein: 1. the display screen comprises a shell, 2, a display screen, 3, a waterproof connector and 4, a handle.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

A lithium battery module equalizing module is shown in figure 1 in the structural schematic diagram, wherein a shell 1 is provided with a display screen 2, a waterproof connector 3 and a handle 4, and the shell 1 is provided with a waterproof connector. Waterproof connector 3 sets up in the below of display screen 2 for connect the lithium cell group, display screen 2 is used for showing the information of input, and handle 4 sets up at the top of casing 1, is convenient for handheld removal casing 1.

Set up high-pressure rectifier module, balanced management unit and control panel in casing 1, high-pressure rectifier module is used for carrying out the rectification to the alternating current of input, and balanced management unit is arranged in carrying out balanced management to each battery cell in the lithium cell group, and the control panel is used for controlling the charge-discharge of balanced management unit to each battery cell in the lithium cell group. The input of high-voltage rectification module is connected on commercial power 220V, and the input of balanced administrative unit is connected to the output of high-voltage rectification module, and the output of balanced administrative unit passes through 3 lithium cell groups of connecting of waterproof connector, and the electricity is connected between balanced administrative unit and the control panel, and the output of waterproof connector 3 is connected to the input of control panel, and the input of display screen 2 is connected to the output of control panel, and its block diagram is shown in fig. 2.

The balance management unit comprises an acquisition control module, a constant-current voltage-limiting charging module, a discharging module and a relay control module. The acquisition control module is used for acquiring the voltage of each single battery in the lithium battery pack, the constant-current voltage-limiting charging module is used for charging the single batteries with low voltage in the lithium battery pack, the discharging module is used for discharging the single batteries with high voltage in the lithium battery pack, and the relay control module is used for controlling the action of the balance management unit under the instruction of the control panel. The input end of the acquisition control module is connected to the lithium battery pack, the output end of the acquisition control module is respectively connected with the input ends of the control panel, the constant-current voltage-limiting charging module and the discharging module, the output ends of the charging module and the discharging module are connected to the single battery through the relay control module, and the controlled end of the relay control module is connected with the output end of the acquisition control module.

The high voltage rectifying module rectifies the input AC power, and the circuit diagram thereof is shown in fig. 3, in which AC220V voltage is input from J17, limited by fuse and NTC, and then reaches the rectifier via the emi shielding circuit to change AC220V into DC high voltage around DC311V, and then filters the DC high voltage.

The output end of the high-voltage rectification module is connected with the input end of the constant-current voltage-limiting charging module through the DCDC isolation module, the circuit diagram of the DCDC isolation module is shown in fig. 4, the circuit is a typical DCDC switch circuit, and the DC311V voltage rectified by the high-voltage rectification module is converted into DC12V for the rear constant-current voltage-limiting charging module to use to supply power to the lithium battery pack.

The circuit diagram of the constant-current voltage-limiting charging module is shown in fig. 5, an XL4016E1 voltage converter is selected, a control board controls the XL4016E1 voltage converter to output voltage, and a DC12V charges a battery through a voltage converter XL4016E1 chip in a constant-current voltage-limiting manner, so that charging of a single battery with low voltage in a lithium battery pack is realized.

The circuit diagrams of the discharging module and the relay control module are shown in fig. 6, an IRFP90N20D power MOS chip is selected, the circuit connects or disconnects a single battery with the circuit through a relay, the relay can be disconnected through a single chip microcomputer when the circuit is abnormal or the voltage is abnormal, the battery and the circuit are effectively protected, the controller controls the opening degree of the IRFP90N20D power MOS chip through outputting PWM waves, the battery is discharged, and discharging current is collected through a shunt resistor for feedback. The circuit realizes the discharge of the single batteries with high voltage in the battery pack, so that the voltage of each single battery in the lithium battery pack tends to be consistent, and the aim of voltage balance among the single batteries is fulfilled. The method has high efficiency and can realize the balance of any single battery in the power battery.

The circuit diagram of the acquisition control module is shown in fig. 7, the input impedance of the operational amplifier is infinite, the static power consumption is low, and the high voltage of the battery can be reduced to be within the voltage range acceptable by the single chip microcomputer through the operational amplifier. The acquisition control module further comprises a temperature sensor arranged in the lithium battery pack and used for detecting the temperature of the battery, the output end of the temperature sensor is connected with the input end of the acquisition control module, and whether the battery is charged or not is judged through the temperature of the battery.

As shown in fig. 8, a circuit diagram of the control board adopts an STM32F103C8T6 single chip microcomputer to control each module of the circuit, so as to realize the balance of the lithium battery pack.

Claims

1. The utility model provides a balanced module of lithium cell module which characterized in that: the lithium battery pack charging and discharging device comprises a shell (1), a high-voltage rectifying module, a balance management unit and a control panel, wherein the high-voltage rectifying module is arranged in the shell (1) and used for rectifying input alternating current, the balance management unit is used for performing balance management on each single battery in the lithium battery pack, the control panel is used for controlling the balance management unit to realize charging and discharging of each single battery in the lithium battery pack, the input end of the high-voltage rectifying module is connected to a mains supply 220V, the output end of the high-voltage rectifying module is connected with the input end of the balance management unit, the output end of the balance management unit is connected with; the shell is provided with a display screen (2) connected with the output end of the control panel and a waterproof connector (3) connected with the input end of the control panel.

2. The lithium battery module balancing module of claim 1, wherein: the balance management unit comprises a collection control module for collecting the voltage of each single battery in the lithium battery pack, a constant-current voltage-limiting charging module for charging the single battery with low voltage in the lithium battery pack, a discharging module for discharging the single battery with high voltage in the lithium battery pack and a relay control module for controlling the balance management unit to act under a control panel instruction, wherein the input end of the collection control module is connected to the lithium battery pack, the output end of the collection control module is respectively connected with the control panel, the input ends of the constant-current voltage-limiting charging module and the discharging module are connected to the single battery through the relay control module, and the controlled end of the relay control module is connected with the output end of the collection control module.

3. The lithium battery module balancing module of claim 2, wherein: and the input end of the constant-current voltage-limiting charging module is connected with the output end of the high-voltage rectifying module through the DCDC isolation module.

4. The lithium battery module balancing module of claim 2, wherein: the acquisition control module comprises a temperature sensor arranged in the lithium battery pack and used for detecting the temperature of the battery, and the output end of the temperature sensor is connected with the input end of the acquisition control module.

5. The lithium battery module balancing module of claim 2, wherein: the constant current voltage-limiting charging module adopts an XL4016E1 chip.

6. The lithium battery module balancing module of claim 2, wherein: the discharging module adopts an IRFP90N20D power MOS tube.

7. The lithium battery module balancing module of claim 1, wherein: the shell (1) is provided with a handle (4) convenient to hold.