Introduction about Vehicle Battery Thermal Management System
High temperature cooling
There are usually five ways to cool the battery at high temperature, namely: natural cooling, air cooling, indirect liquid cooling, direct cooling and immersion cooling. Except for immersion cooling, the other four methods are applied to production vehicles. Natural cooling/air cooling is mainly used in low-end vehicles and some PHEV, while liquid cooling is the mainstream BEV cooling method. Although direct cooling technology is only applied to some BYD models and BMW iX3 models, we think it may gradually become the mainstream in the next period of time. In addition, the development of heat pipe technology and phase change materials also provides many possibilities for cooling technology.
Low temperature heating
The low-temperature heating technology of batteries can be divided into two categories: external heating and internal heating.
The internal heating method is to directly heat the inside of the battery through the chemical reaction inside the battery. This method has high heating efficiency and low energy consumption. The external heating mode is to generate heat through external heating components, thus heating the battery. The main heating modes are gas heating, liquid heating and resistance heating. The external heating system is simple, but the efficiency is relatively low. The internal heating is not limited by the size, space and installation mode of the battery box, and the heat is generated from the inside, and the heating is uniform, but it must be equipped with high and low frequency loading control circuit devices or external control circuits. At present, due to technical and cost reasons, external heating is still the mainstream way of battery system heating, and internal heating is basically in the laboratory stage.
Function about BMS
data acquisition
In order to accurately obtain the working condition of power battery and implement management strategy, BMS needs to collect the voltage, working current, temperature and other information of each battery cell and battery pack in real time through sampling circuit.
State estimation
Accurate and efficient monitoring of the state quantity of power battery is the key to battery and group management, and it is also the basis of energy management and control of electric vehicles. Therefore, BMS needs to estimate the state of the battery pack based on the real-time collected data of the power battery, using the established algorithm and strategy, so as to obtain the state information of the power battery at each moment, including SOC, SOH, SOP and SOE, which provides support for the real-time state analysis of the power battery.
Information communication
BMS needs to integrate multiple functional modules, reasonably coordinate the communication operation among the modules, store some key data of the power battery, and maintain communication with the vehicle controller. BMS also needs to interact with the cloud platform in real time.
Vehicle Battery Thermal Management System
When the power battery works, it is not only affected by the ambient temperature, but also by the heat generated by its own charge and discharge. Therefore, BMS needs to integrate battery thermal management module. It can determine the intensity of active heating/cooling according to the temperature distribution information and charging/discharging requirements in the battery pack, so that the power battery can work at the most suitable temperature as much as possible, give full play to the performance of the power battery, and prolong the service life of the power battery.
Energy management
Energy management includes two aspects, one is charging management, and the other is discharge control. BMS needs to adjust the charging power according to the real-time characteristics of the power battery, the temperature and the power level of the charger to control the charger to charge the battery safely. In addition, BMS should reasonably control the energy output of power battery and the energy recovery of regenerative braking to avoid overcharge/overdischarge, and BMS should also reasonably distribute the energy flow direction of battery to ensure the best output performance.
Safety protection
The safety protection function of power battery mainly refers to the online fault diagnosis and safety control of power battery and its group.
Brief introduction about BQC:
High standard quality control, fully IATF16949, ISO14001, ISO9001 certificated.
Found in 2002, 580 people, 13000 SQM, 18 SMT lines, 4 DIP lines, 3 hand soldering lines, 3 finished assembly lines, 5 conformal coating lines, 4 testing lines.
Equipped with professional design team & engineering team: hardware, software, ID&MD design, mold design,automation testing equipment design.
Good at alternative suggestion to cost down 30%-50% and shorten lead time.
Supply chain: BQC gets "big customer" level services and supports from ADI,NXP,TI,ST and domestic first-line IC brand.
What we have
You can see our factory instrument from the below picture.
Certificates
ISO9001 ISO13485 CTI
ISO14001 CE IKEA
UL Walmart
BQC Have approved by GE,WAL-MART,UL,IKEA,ISO13485,ISO9001,ISO14001,etc. and will get IATF16949 as soon as possible.
FAQ
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1.Q：What's your MOQ for PCBA? |
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A：No MOQ for PCB and PCBA. We can do prototype and mass production as well. |
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2.Q：What are the characteristics of your company's products? |
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A：Our company has engaged in the PCB industry for over 15 years,we have strict quality, our quality standard is IPC-A-610F,every board will inspected by AOI.We make sure delivery Zero defect product to customer. |
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