CN210576302U

CN210576302U - Wireless communication battery management system

Info

Publication number: CN210576302U
Application number: CN201921287742.1U
Authority: CN
Inventors: 朱维; 谢佳平; 曾群欣; 曾凡帅; 王志田; 段宏波; 王天聪; 孙锋; 罗正杰; 李金龙; 朱博; 宋玉枝
Original assignee: Shanghai Pinetree Power Technology Co ltd
Current assignee: Shanghai Pinetree Power Technology Co ltd
Priority date: 2019-08-09
Filing date: 2019-08-09
Publication date: 2020-05-19
Anticipated expiration: 2029-08-09

Abstract

The utility model relates to a wireless communication battery management system, including host system and a plurality of follow control module, host system all installs wireless communication unit with from the control module on, follow control module and include the electrical unit, the sampling unit, PCB board and a plurality of sheetmetal, wireless communication unit, electrical unit and sampling unit are all integrated on the PCB board, electrical unit connects wireless communication unit and sampling unit, a plurality of sheetmetals distribute in the both sides of PCB board, the electrode of electric core in the battery module is connected to the one end of sheetmetal, the sampling unit is connected to the other end, wherein there are positive electrode and the negative electrode of the electric core of battery module respectively connected to the one end of two sheetmetals, electrical unit is all connected to the other end. Compared with the prior art, the utility model discloses reduced the line resistance loss on the battery monomer voltage sampling return circuit by a wide margin, improved the sampling precision, strengthened the succinct of battery module.

Description

Wireless communication battery management system

Technical Field

The utility model belongs to the technical field of a battery management and specifically relates to a wireless communication battery management system is related to.

Background

With the development and progress of modern society science and technology, the lithium battery technology plays an important role in new energy technology. The energy density of lithium batteries is increasing day by day, and the application range is very wide. The lithium battery is increasingly applied to new energy electric vehicles and electric energy storage as a power battery.

In the application of the power battery in automobiles or energy storage, a battery management system is required to be used for monitoring and managing the power battery, so that the power battery can be safely and efficiently applied. Traditional battery management system, along with total pressure rising, the sampling pencil is various, and the installation is complicated, connects mistake or misconnection easily, and then arouses the short circuit. In the aspect of the energy storage is utilized in echelon after car battery package retrieves, the power battery module is disassembled the difficulty, disassembles with high costsly, and the control unit and the utilization ratio of pencil are very low, have caused too much waste.

Meanwhile, too many overlong sampling lines have harness impedance and are easily interfered by a high-voltage loop, so that the sampling precision is affected, and the phenomena of large sampling deviation, poor communication and the like are caused. When the sampling line is not installed properly or under certain conditions, abrasion is easy to occur, and even short circuit, fire and the like can be caused.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to a wireless communication battery management system for overcoming the above-mentioned drawbacks of the prior art.

The purpose of the utility model can be realized through the following technical scheme:

the utility model provides a wireless communication battery management system, includes host system and a plurality of from the accuse module, host system and follow the accuse module on all install wireless communication unit, follow the accuse module and include electrical unit, sampling unit, PCB board and a plurality of sheetmetal, wireless communication unit, electrical unit and sampling unit all integrated on the PCB board, electrical unit connects wireless communication unit and sampling unit, a plurality of sheetmetals distribute in the both sides of PCB board, the electrode of electric core in the battery module is connected to the one end of sheetmetal, sampling unit is connected to the other end, wherein the positive electrode and the negative electrode of the electric core of battery module are connected respectively to the one end of two sheetmetals, electrical unit is all connected to the other end.

Further, the metal sheet is a nickel sheet.

Further, the metal sheet is directly connected with the battery cell of the battery module or a bus bar of the battery cell on the battery module through a welding mode.

Further, the quantity of sheetmetal more than the electric core quantity of battery module one more.

Further, the temperature sensor is arranged on the edge of the joint of the metal sheet and the PCB.

Furthermore, the PCB is provided with a sampling pad, and the metal sheet is connected with the sampling unit and the power supply unit through the sampling pad.

Furthermore, the PCB board be the rectangular plate, the sheetmetal distribute in the both sides of rectangular plate long limit.

Further, the wireless communication unit comprises a Bluetooth chip, a GPRS chip or a WIFI chip.

Compared with the prior art, the utility model has the advantages of it is following:

1. the utility model discloses replace sampling pencil and connector between traditional slave control module and the battery module with the mode that the sheetmetal directly welds, reduced the line resistance loss on the battery monomer voltage sampling return circuit by a wide margin, reduced the cost simultaneously; and, the form of sheetmetal welded has improved the succinct of battery module, is convenient for install and disassemble, and the effectual sampling line of having avoided is because of the not hard up that vibrations, friction brought, drops and risk such as short circuit fire, safe and reliable more.

2. The utility model discloses set up temperature sensor on the junction edge of sheetmetal and PCB board, the lug connection mode of cooperation sheetmetal has avoided the interference of high-pressure return circuit to the pencil, has improved the monomer sampling, the precision of temperature sampling.

3. The master control module and the slave control module directly adopt the design of wireless communication, so that a sampling wire harness and a sampling connector are also omitted, and the wireless beam connection of the whole system is realized.

4. Adopt the utility model discloses group package and network deployment are all very simple and convenient, need not to consider the sampling pencil and change the problem, can directly use the battery module as basic unit, realize the high pressure and concatenate, automatic network deployment, the echelon utilization after the power battery of being convenient for retrieves.

Drawings

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

Fig. 2 is a schematic structural diagram of the slave control module.

Fig. 3 is a schematic structural diagram of the main control module.

Fig. 4 is a circuit diagram of the power unit chip.

Fig. 5 is a circuit diagram of a sampling unit chip.

Reference numerals: 1. the intelligent monitoring system comprises a main control module, 11, a processor, 13, a main power supply unit, 14, a CAN unit, 15, other units, 2, a slave control module, 21, a sampling unit, 22, a wireless communication unit, 23, a power supply unit, 24, a metal sheet, 25, a sampling pad, 26, a temperature sensor, 27, a PCB board, 3, a battery module, 31 and electrodes.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.

As shown in fig. 1, the present embodiment provides a wireless communication battery management system, which includes a master control module 1 and a plurality of slave control modules 2, wherein the master control module 1 and the slave control modules 2 are respectively provided with a wireless communication unit, and the slave control modules 2 are welded on a battery module 3. The master control module and the slave control module have wireless communication functions, and wireless signal transmission between the master control module and the slave control module is realized.

As shown in fig. 2, each slave control module 2 includes a power supply unit 23, a sampling unit 21, a PCB board 27, and a plurality of metal sheets 24. The PCB board 27 is a rectangular plate, the metal sheets 24 are uniformly distributed on both sides of the long edge of the rectangular plate, and the metal sheets 24 are nickel sheets, the number of which is one more than the number of the electric cores of the corresponding battery modules 3. One extra metal sheet 24 is used for connecting the negative electrode of the battery cell, and the rest are connected with the positive electrode of the battery cell. Sampling pads 25 are arranged on two sides of the long side of the PCB 27 and used for welding the PCB 27 with metal sheets 24. One end of the metal sheet 24 is connected to the electrode 31 of the battery cell in the battery module 3, and the other end is connected to the sampling unit 21 through the sampling pad 25. One end of each of the two metal sheets 24 is connected to the positive electrode 31 and the negative electrode 31 of the battery core of the battery module 3, and the other end is connected to the power supply unit 23 for supplying power from the control module 2. The metal sheet 24 is directly connected to the battery core of the battery module 3 or the bus bar connected to the battery core on the battery module by welding. A temperature sensor 26 is also provided on the PCB 27, the temperature sensor 26 being located on the edge of the junction of the metal sheet 24 and the PCB 27, adjacent to the nickel sheet.

The slave control module 2 directly gets power from the battery module 3 without additional power supply, and converts the total voltage of the battery module 3 into a low-voltage direct-current power supply output of 3.3V through a DC-DC direct-current step-down power supply chip MP4569 shown in fig. 4, so as to supply power to the MCU of the wireless communication unit 22. The wireless communication unit 22 module generally is including bluetooth chip, GPRS chip or WIFI chip, and this embodiment adopts the KW36 chip that sells on the market. The sampling unit 21 adopts an MC33771 chip as shown in fig. 5, and is matched with various existing mature components to realize functions of single voltage acquisition, temperature acquisition, open circuit detection, equalization and the like. The slave control module 2 arranges the collected signals and sends the signals to the master control module 1 in a wireless mode. The wireless communication unit 22 on the main control module 1 communicates with each slave control module 2 in turn, and sends signals transmitted from the slave control modules 2 to the processor for SOC calculation, thermal management and the like. The master control module 1 also sends commands such as equalization and open circuit detection to the slave control module 2 in a wireless signal mode, so that corresponding functions are realized.

As shown in fig. 3, the master control module 1 is a complete and independent PCB board, and a wireless communication unit 22 is added on the basis of the functions of the conventional BMS master control module, so as to achieve the purpose of wireless communication with the slave control module 2. The wireless communication unit 22 also employs a commercially available KW36 chip. The main control module 1 obtains electricity from the low-voltage lead storage battery, usually 12V or 24V, and performs voltage reduction conversion through the main power supply unit 13 on the PCB board to output the low-voltage electricity to the processor 11 and the wireless communication unit 22 for power supply. The main control module 1 obtains the required data from the control module 2 through the wireless communication unit 22, so as to perform data processing, voltage monitoring, temperature monitoring, SOC and SOH calculation, and the above functions are all realized by other corresponding units 15, which are all the existing mature technologies, and therefore, the details are not repeated. The communication between the main control module 1 and other control elements outside the system is mainly transmitted by means of the wired CAN unit 14.

After the embodiment is used, when the slave control module 2 and the battery module 3 are installed, the connection problem of sampling lines is not needed to be considered, the PCB with the sampling bonding pad 25 of the slave control module 2 and the positive/negative end of the battery module 3 are directly welded together through the metal sheet 24, so that a standardized battery module 3 can be formed, when the battery module 3 is further assembled into a battery pack, the high-voltage high-current loop is directly connected, the battery module 3 provided with the slave control module 2 can be automatically connected with the master control module 1 in a networking manner, and information interaction is completed, so that the system is very simple.

When being applied to echelon and utilizing after power battery package retrieves, need not excessively to disassemble, change the sampling line and follow accuse module 2, directly pull down whole battery module 3, can use by reconnection. And any sampling wire harness and the slave control module 2 can not be wasted, the whole process is very simple and efficient, and the actual cost is correspondingly reduced. In the working process, the sampling precision of the voltage and the temperature of the single battery is improved, so that the battery management system can more accurately acquire the basic information and the health state of the battery module 3, and the overall performance of the battery pack is further improved.

The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the teachings of the present invention without undue experimentation. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.

Claims

1. The utility model provides a wireless communication battery management system, includes host system (1) and a plurality of from accuse module (2), host system (1) and from all install wireless communication unit (22) on accuse module (2), its characterized in that, from accuse module (2) including power supply unit (23), sampling unit (21), PCB board (27) and a plurality of sheetmetal (24), wireless communication unit (22), power supply unit (23) and sampling unit (21) all integrated on PCB board (27), power supply unit (23) are connected wireless communication unit (22) and sampling unit (21), a plurality of sheetmetal (24) distribute in the both sides of PCB board (27), electrode (31) of electric core in battery module (3) are connected to the one end of sheetmetal (24), sampling unit (21) are connected to the other end, wherein the positive electrode (31) and the negative electrode (31) of the electric core of battery module (3) are connected respectively to the one end of two sheetmetals (24) And the other ends are connected with a power supply unit (23).

2. The battery management system of claim 1, wherein the metal sheet (24) is a nickel sheet.

3. The wireless communication battery management system according to claim 1, wherein the metal sheet (24) is directly connected to the battery cells of the battery module (3) or a bus bar connected to the battery cells on the battery module (3) by welding.

4. The wireless communication battery management system according to claim 1, wherein the number of the metal sheets (24) is one more than the number of the battery cells of the battery module (3).

5. The wireless communication battery management system according to claim 1, further comprising a temperature sensor (26), wherein the temperature sensor (26) is disposed at an edge of a junction of the metal sheet (24) and the PCB board (27).

6. The battery management system according to claim 1, wherein the PCB board (27) is provided with a sampling pad (25), and the metal plate (24) is connected to the sampling unit (21) and the power supply unit (23) through the sampling pad (25).

7. The battery management system of claim 1, wherein the PCB (27) is a rectangular plate, and the metal sheets (24) are disposed on both sides of the long side of the rectangular plate.

8. The battery management system of claim 1, wherein the wireless communication unit (22) comprises a bluetooth chip, a GPRS chip or a WIFI chip.