CN214450307U

CN214450307U - New energy automobile battery protection device

Info

Publication number: CN214450307U
Application number: CN202023085796.5U
Authority: CN
Inventors: 徐海铭; 游煜城; 谢永达; 张润樾; 陈松涛
Original assignee: Guangdong Vocational College Of Finance And Trade
Current assignee: Guangdong Vocational College Of Finance And Trade
Priority date: 2020-12-21
Filing date: 2020-12-21
Publication date: 2021-10-22
Anticipated expiration: 2030-12-21

Abstract

The utility model discloses a new energy automobile battery protection device, which comprises a battery module, a battery detection sensor module, a controller, a V2X communication module and a cloud server; the battery detection sensor module is arranged in the battery module and is connected with the controller through a CAN bus, and the battery module and the V2X communication module are respectively connected with the controller; the V2X communication module is in wireless data connection with the cloud server; the battery module comprises an end cover, a shell and a plurality of battery units, wherein the front end of the shell is provided with an opening, the end cover is packaged at the opening, and the end cover is provided with a positive electrode, a negative electrode and a cooling liquid interface; the cooling pipe and the battery slot are arranged in the shell, the battery unit is arranged in the battery slot, the positive electrode and the negative electrode are electrically connected with the battery unit and the controller, and the cooling liquid interface is connected with the cooling pipe. This design adopts the battery module that has good leakproofness, stability and thermal diffusivity, the security of reinforcing system to realize that the vehicle is safer, more intelligent, more environmental protection.

Description

New energy automobile battery protection device

Technical Field

The utility model relates to an automobile control technical field specifically is a new energy automobile battery protection device.

Background

The shortage of petroleum resources causes the oil price to be continuously high, and new energy automobiles driven by electric power are concerned by people. Traditional automobile manufacturers start to transform and produce new energy automobiles, for the development of new energy automobiles, the government of China also gives a lot of policy support, and the national institute of government in 6 months of 2012 releases energy-saving and new energy industry development plans, and explains the development route of new energy automobiles.

The new energy automobile has serious natural problems, and new energy automobile natural data in 2019 are obtained according to a research report on safety of a power battery in 2019 issued by battery safety laboratories of Qinghua university; wherein the safety accidents of the new energy automobile related to the safety of the power battery are more than 40. Among the 40 accidents, the battery thermal runaway is an important reason for the safety accident of the power battery, and in order to reduce the loss of the automobile nature caused by the battery thermal runaway, the BMS system should not only have a monitoring function but also need an early warning function, and integrates a new communication technology and a more advanced sensor technology. There are also many natural accidents of new energy vehicles, which occur during driving of the vehicles, and the reason is attributed to "electricity abuse", and the wrong current and voltage during driving of the vehicles causes severe heating of the driving motor and accelerated aging of the vehicle circuit, so the electric control technology of the new energy needs to be updated and iterated. The electric control technology is one of three electricity of the new energy automobile, has irreplaceable significance for the new energy automobile, and relates to whole automobile control, battery supervision, driving motor optimal configuration and the like. As one of key parts of a power structure of the new energy automobile, the main performance indexes of the new energy automobile, such as climbing, acceleration, highest speed and the like, are directly influenced by the normal operation of electric control.

SUMMERY OF THE UTILITY MODEL

In order to solve the defect that exists among the above-mentioned prior art, the utility model provides a new energy automobile battery protection device realizes that the vehicle is safer, more intelligent, the target of more environmental protection.

The utility model provides an adopted technical scheme of its technical problem does: the new energy automobile battery protection device comprises a battery module, a battery detection sensor module, a controller, a V2X communication module and a cloud server; the battery detection sensor module is arranged in the battery module and is connected with the controller through a CAN bus, and the battery module and the V2X communication module are respectively connected with the controller; the V2X communication module is in wireless data connection with the cloud server; the battery module comprises an end cover, a shell and a plurality of battery units, wherein the front end of the shell is provided with an opening, the end cover is packaged at the opening, and the end cover is provided with a positive electrode, a negative electrode and a cooling liquid interface; the battery pack is characterized in that a cooling pipe and a battery slot are arranged in the shell, the battery unit is arranged in the battery slot, the positive electrode and the negative electrode are electrically connected with the battery unit and the controller, and the cooling liquid interface is connected with the cooling pipe.

The battery detection sensor module is arranged in the shell, the battery detection sensor module monitors the battery module, wired data connection is carried out between the controller and the battery module through a CAN bus (CAN is a controller Area Network for short), and the controller is connected with the cloud server through the V2X communication module in a wireless data mode. Specifically, the controller may perform threshold comparison processing on data transmitted by the battery detection sensor module, package and process data in an abnormal condition (outside a threshold), and report the data to the cloud server through the V2X communication module, and the cloud server may feed back a preprocessing plan instruction to the controller and/or send a notification to a vehicle owner through the V2X communication module after analysis.

Furthermore, a ventilation pipe is further arranged in the shell, a ventilation opening communicated with the ventilation pipe is formed in the end cover and the shell, and a hot melt block is plugged at the ventilation opening. When the temperature in the battery module is too high, the hot melt blocks are quickly dissolved to open the ventilation openings, and the temperature is reduced in an auxiliary manner. The cooling device comprises a shell, at least two battery slots are arranged in the shell side by side, and a cooling pipe and a ventilation pipe are arranged between the two adjacent battery slots.

Furthermore, an explosion-proof plate is arranged around the inner wall of the shell.

Furthermore, a layer of sealing cushion plate is arranged at the joint of the end cover and the shell.

Further, the battery detection sensor module comprises a current sensor, a voltage sensor and a temperature sensor, wherein the current sensor adopts a hall current sensor, the voltage sensor adopts a hall voltage flow sensor, and the temperature sensor adopts a thermocouple.

Furthermore, the battery module is provided with a non-dissipative centralized equalization management circuit chip which is electrically connected with the positive electrode, the negative electrode and all the battery units so as to ensure that the charging states of all the batteries are basically consistent during charging; the battery detection sensor module transmits the battery state to the controller through the CAN bus, dynamically adjusts the current and the voltage of the battery during charging, avoids the occurrence of the overcharge condition of a single battery, and prolongs the service life of the battery.

Further, a battery repair circuit module/a battery repair circuit board are further installed in the battery module, the controller is connected with the battery repair circuit module/the battery repair circuit board in a control mode, and the battery repair circuit module/the battery repair circuit board is electrically connected with the battery module. The controller CAN download instructions to the battery repair circuit module/battery repair circuit board through the CAN bus, so that the system CAN autonomously repair the battery module with abnormal current and voltage, and the performance of the battery pack CAN be kept in a relatively stable state. The aging speed of the battery pack is slowed down, and the phenomena of battery short circuit and battery thermal runaway caused by the performance reduction of the battery are reduced. The battery repair circuit module can adopt a pulse repair method and also can adopt a strong current repair method.

Further, the controller adopts a vehicle-mounted embedded ARM processor.

This is novel compare with prior art, this neotype beneficial effect is: the battery module with good sealing performance, stability and heat dissipation performance is adopted in the new energy automobile battery protection device, and the safety of the system is enhanced; and regard as the data processing target with the battery module, the battery detection sensor module that adopts wired communication's mode to monitor the controller and carry out the battery module is connected, data transmission is fast and stable, be difficult for disturbing, the controller is handled the analysis to data, if find the battery state have can not compensate prosthetic irreversible serious error through the controller, can in time pass through V2X communication module and upload to cloud computing server, the power electric quantity configuration condition of the in-process vehicle that the cloud server collected the user and travel, accessible cell-phone APP feeds back the car battery situation in real time, let the user know whether the driving situation of oneself is healthy, therefore reduce the speed that the driving of car owner's non-normative accelerates the ageing of battery, and can dispose the new energy automobile power of car owner's demand. And the acquired data can be analyzed and fed back by big data cloud computing, so that the electric control is integrated to self-adaptively configure power energy for the vehicle, the energy consumption is reduced, and the endurance mileage is increased.

Drawings

FIG. 1 is a block flow diagram of the present invention;

fig. 2 is a schematic structural view of a battery module according to the present invention;

fig. 3 is a circuit diagram of an embodiment of the battery repair circuit module of the present invention.

Detailed Description

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

As shown in fig. 1, the new energy vehicle battery protection device includes a battery module, a battery detection sensor module, a controller, a V2X communication module, and a cloud server. The battery detection sensor module is installed in the battery module and is connected with the controller through a CAN bus, and the battery module and the V2X communication module are respectively electrically connected with the controller to realize signal interaction and instruction control. The V2X communication module is in wireless data connection with the cloud server and stores corresponding detection data and instructions in the cloud server. The V2X communication module is connected with the vehicle owner terminal (which can be a mobile phone or a personal computer) at the same time, and informs the vehicle owner of the detection information and the processing instruction information in a short message mode. The battery module is characterized in that a battery repair circuit module/a battery repair circuit board is further installed in the battery module, the controller is in control connection with the battery repair circuit module/the battery repair circuit board, the battery repair circuit module/the battery repair circuit board is in electrical connection with the battery module, and a repair instruction of the controller repairs the faults of the battery module through the battery repair circuit module/the battery repair circuit board.

As shown in fig. 2, the battery module includes an end cover 1, a housing 2 and a plurality of battery units 3, an opening is provided at the front end of the housing 2, the end cover 1 is sealed at the opening, and a layer of sealing pad 26 is provided at the joint of the end cover 1 and the housing 2 for increasing the sealing performance; the end cover 1 is provided with a positive electrode, a negative electrode and a CAN bus interface; the periphery of the inner wall of the shell 2 is provided with the explosion-proof plate 24, so that the structure is safer and firmer; still be equipped with the battery slot that a plurality of set up side by side in the shell 2, the quantity of preferred battery slot is two. The battery units 3 are arranged in the battery slots, a cooling pipe 21 and a ventilation pipe 22 are arranged between every two adjacent battery slots, and the cooling pipe 21 is a hollow circular pipe; a battery detection sensor module 23 is further packaged in the housing 2, the positive electrode and the negative electrode are electrically connected to the battery unit 3, the CAN bus interface is electrically connected to the temperature sensor 23, the end cap 1 and/or the housing 2 are further provided with a cooling liquid interface and a vent respectively communicating with the cooling pipe 21 and the vent pipe 22, a hot melt block is sealed at the vent, the hot melt block CAN be an EVA hot melt adhesive with a melting point of about 60-70 ℃ or a PE hot melt adhesive with a melting point of about 70-90 ℃, when thermal runaway occurs in the housing 2, the hot melt block melts to open the vent, and a large amount of gas in the housing 2 CAN rapidly discharge heat through the vent.

The battery detection sensor module 23 includes a current sensor, a voltage sensor, and a temperature sensor, the current sensor employs a hall current sensor, the voltage sensor employs a hall voltage flow sensor, and the temperature sensor may employ a thermocouple. The current sensor and the voltage sensor respectively monitor the current and the voltage of the battery module, and the temperature sensor acquires the temperature value of the battery module through the analog differential voltage of the thermocouple; monitoring data of the battery detection sensor module 23 is connected to the controller through a CAN bus (CAN is short for controller Area Network) through wired data, and the controller is connected to the cloud server through the V2X communication module through wireless data. The controller adopts a vehicle-mounted embedded ARM processor, the controller sets a threshold value for data, the controller can package and process the data under an abnormal condition (namely, the data is judged to be beyond the threshold value) and then report the data to the cloud server through the V2X communication module, and the cloud server feeds back a preprocessing plan instruction to the controller through the V2X communication module after analysis and/or sends the preprocessing plan instruction to a vehicle owner. The V2X communication module adopts a 5G wireless communication module.

Furthermore, the battery module is provided with a non-dissipative centralized equalization management circuit chip to ensure that the charging states of the batteries are basically consistent during charging; the battery detection sensor module transmits the battery state to the controller through the CAN bus, dynamically adjusts the current and the voltage of the battery during charging, avoids the occurrence of the overcharge condition of a single battery, and prolongs the service life of the battery.

Furthermore, the controller CAN download an instruction to the battery repair circuit module/battery repair circuit board through the CAN bus, so that the system CAN autonomously repair the battery module with abnormal current and voltage, and the performance of the battery pack CAN be kept in a relatively stable state. The aging speed of the battery pack is slowed down, and the phenomena of battery short circuit and battery thermal runaway caused by the performance reduction of the battery are reduced. The battery repairing circuit module can adopt a pulse repairing method, as shown in fig. 3, the battery repairing principle is that a battery is charged by adopting high voltage 40-47V and 10 omega resistor current limiting, and for a battery with high internal resistance, high voltage is generated on the battery so as to break down a barrier formed by a vulcanized crystal in the battery, and the purpose of eliminating battery vulcanization is achieved. The current limiting resistor limits the charging current to 4A (the short-circuit current is only 4A multiple points), and if the battery has 12V voltage, the charging current is about 3A. The circuit is divided into three parts, namely a power supply part, a control circuit part and a charging circuit part. Current part: rectifying 220V alternating current commercial power by a transformer to obtain 40-47V direct current voltage for a charging circuit, and meanwhile, stabilizing the voltage into 12V through LM7812 to supply power for a control circuit; the control circuit: and a square wave generator is formed by NEC555, and 2 MOS tubes IRF630 are driven by output. The conduction width of the MOS tube is 100-170 mu S, and the turn-off width is 250-180 mu S and can be adjusted. The on duty ratio is 28.6% to 48.6%, thereby adjusting the average value of the charging current. A charging circuit: the anti-reverse relay circuit consists of an anti-reverse relay circuit, an MOS (metal oxide semiconductor) tube and an indicating circuit. After the repairing device is started, although the MOS tube enters into chopping operation, if the battery is not connected to the line or the voltage of the battery is too low to enable the relay to act, the charging loop is disconnected; it may also be a strong electric repair method.

The above mentioned embodiments are only preferred embodiments of the present invention, and the scope of the present invention should not be limited thereby, and all the simple equivalent changes and modifications made according to the claims and the description of the present invention are still included in the scope covered by the present invention.

Claims

1. The new energy automobile battery protection device is characterized by comprising a battery module, a battery detection sensor module, a controller, a V2X communication module and a cloud server; the battery detection sensor module is arranged in the battery module and is connected with the controller through a CAN bus, and the battery module and the V2X communication module are respectively connected with the controller; the V2X communication module is in wireless data connection with the cloud server; the battery module comprises an end cover, a shell and a plurality of battery units, wherein the front end of the shell is provided with an opening, the end cover is packaged at the opening, and the end cover is provided with a positive electrode, a negative electrode and a cooling liquid interface; the battery pack is characterized in that a cooling pipe and a battery slot are arranged in the shell, the battery unit is arranged in the battery slot, the positive electrode and the negative electrode are electrically connected with the battery unit and the controller, and the cooling liquid interface is connected with the cooling pipe.

2. The new energy automobile battery protection device of claim 1, wherein the battery detection sensor module comprises a current sensor, a voltage sensor, and a temperature sensor.

3. The new energy automobile battery protection device of claim 2, wherein the current sensor is a hall current sensor, the voltage sensor is a hall voltage flow sensor, and the temperature sensor is a thermocouple.

4. The new energy automobile battery protection device of claim 1, wherein a battery repair circuit module is further installed in the battery module, the controller controls and connects the battery repair circuit module, and the battery repair circuit module is electrically connected with the battery module.

5. The new energy automobile battery protection device of claim 1, wherein the controller is a vehicle-mounted embedded ARM processor.