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发表于 20-6-2023 04:08 PM
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发表于 20-6-2023 04:12 PM
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猜測它會自主研發吧...畢境它的本業就是電池.....
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发表于 20-6-2023 04:16 PM
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它有自研的能力...大概它是不太可能用tesla專利的....
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发表于 20-6-2023 04:25 PM
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BMS不是TESLA专利，很多公司都会做，只是做得好不好而已。
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发表于 20-6-2023 04:33 PM
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但大家看一看....BMS (battery management system) 就是管理電池供電與儲電,
電機motor不一樣, 供電的模式就會依其motor的特性管理供電, 以達到最佳的效率與效能.
中國的EV多採用永磁同步電機, tesla 早期都採用交流異步電機,
兩者天差地遠....BMS的設計也不可能會相同......
只有某個儍B堅持一樣的...它把BMS從整套系統獨立剝離出來...
然後堅持不相關!不懂裝懂的人,
大家不要聽它的....它只是來賣儍搞笑而己!
完全连BMS是做什么的都不知道，一直讲电机，然后就这样判定电机不一样，所以电池管理也不一样，所以中国电动车不可能抄tesla。
自己幻想出来的东东。。
Battery Management System
A Battery Management System (BMS), which manages the electronics of a rechargeable battery, whether a cell or a battery pack, thus becomes a crucial factor in ensuring electric vehicle safety. It safeguards both the user and the battery by ensuring that the cell operates within its safe operating parameters. BMS monitors the State Of Health (SOH) of the battery, collects data, controls environmental factors that affect the cell, and balances them to ensure the same voltage across cells.
A battery pack with a BMS connected to an external communication data transfer system or a data bus is referred to as a smart battery pack. It may include additional features and functions such as fuel gauge integration, smart bus communication protocols, General Purpose Input Output (GPIO) options, cell balancing, wireless charging, embedded battery chargers, and protection circuitry, all aimed at providing information about the battery’s power status. This information can help the device conserve power intelligently.
A smart battery pack can manage its own charging, generate error reports, detect and notify the device of any low-charge condition, and predict how long the battery will last or its remaining run-time. It also provides information about the current, voltage, and temperature of the cell and continuously self-corrects any errors to maintain its prediction accuracy. Smart battery packs are usually designed for use in portable devices such as laptops and have embedded electronics that improve the battery’s reliability, safety, lifespan, and functionality. These features enable the development of end products that are user-friendly and more reliable. For instance, with embedded chargers, batteries can have longer life cycles as the chargers charge the batteries to optimal, ideal specifications within the temperature limits. Accurate fuel gauges allow users to confidently discharge batteries to their limits and not worry about damaging the cell. GPIO, which stands for General Purpose Input/Output (GPIO), is an interface used to connect electronic devices and microcontrollers such as diodes, sensors, displays, and so on.
Typical Battery Management System
Functions of the BMS
Fitting an EV with a BMS can improve safety. The battery management system performs the following four functions:
1. Monitoring battery parameters
This is the primary function of a BMS. It monitors the state of a cell as represented by parameters such as:
Voltage—indicates a cell’s total voltage, the battery’s combined voltage, maximum and minimum cell voltages, and so on.
Temperature—displays the average cell temperature, coolant intake and output temperatures, and the overall battery temperature.
The state of charge of the cell to show the battery’s charge level.
The cell’s state of health—shows the remaining battery capacity as a percentage of the original capacity.
The cell’s state of power——shows the amount of power available for a certain duration given the current usage, temperature, and other factors.
The cell’s state of safety——determined by keeping a collective eye on all the parameters and determining if using the cell poses any danger.
The flow of coolant and its speed.
The flow of current into and out of the cell.
2. Managing thermal temperatures
Temperature is the biggest factor affecting a battery. The battery’s thermal management system keeps an eye on and controls the temperature of the battery. These systems can either be passive or active, and the cooling medium can either be a non-corrosive liquid, air, or some form of phase change. Using air as a coolant is the simplest way to control battery temperatures.
Air cooling systems are often passive as they rely on the convection of the surrounding air or use a fan to induce airflow. However, the main drawback is the system’s inefficiency. Significant power is used to run the cooling system as compared to a liquid-based one. Also, in larger systems such as car batteries, the additional components needed for air-based systems such as filters can increase the weight of the car, further affecting the battery’s efficiency.
Liquid-cooled systems have a higher cooling potential than air because they are more thermally conductive. The batteries are submerged in coolant, or the coolant can freely flow into the BMS without affecting the battery. However, this indirect form of thermal cooling can create large temperature differences across the BMS due to the length of the cooling channels. But they can be reduced by pumping the coolant faster, so a tradeoff is created between the pumping speed and thermal consistency.
3. Making key calculations
A BMS calculates various battery values based on parameters such as maximum charge and discharge current to determine the cell’s charge and the discharge current limits. These include:
The energy in kilowatt-hour(s) (kWh) delivered since the last charge cycle
The internal impedance of a battery to measure the cell’s open-circuit voltage
Charge in Ampere per hour (Ah) delivered or contained in a cell (called the Coulomb counter), to determine the cell’s efficiency
Total energy delivered and operating time since the battery started being used
Total number of charging-discharging cycles the battery has gone through
4. Facilitating internal and external communication
A BMS has controllers that communicate internally with the hardware at a cellular level and externally with connected devices. These external communications differ in complexity, depending on the connected device. This communication is often through a centralized controller, and it can be done using several methods, including:
Different types of serial communications
CAN bus communicators, often used in vehicles
DC-BUS communications, which are serial communications over power lines
Various types of wireless communication including radio, pagers, cellphones, and so on.
Only a high-level voltage BMS has internal communication; low-level centralized ones simply measure cell voltage by resistance divide. A distributed or modular BMS must utilize a low-level internal cell controller for modular architecture or implement controller-to-controller communication for a distributed architecture. However, such communication is difficult, especially in high voltage systems, due to the voltage shift between cells. What this means is that the ground signal in one cell may be hundreds of volts higher than that of the next cell.
This issue can be addressed using software protocols or using hardware communication for volt-shifting systems. There are two methods of hardware communication—using an optical-isolator or wireless communication. Another factor hampering internal communication is the restriction of the maximum number of cells that can be used in a specific BMS architectural layout. For instance, for modular hardware, the maximum number of nodes is 255. Another restriction affecting high voltage systems is the seeking time (for reading voltage/current) of all cells, which limits bus speeds and causes loss of some hardware options.
Optimal Energy Utilization
Battery management systems keep the battery safe, reliable, and increase the senility without entering a damaging state. Different monitoring techniques are used to maintain the state of the battery, voltage, current, and ambient temperature. The BMS communicates with the onboard charger to monitor and control the charging of the battery pack. It also helps maximize the range of the vehicle by optimally using the amount of energy stored in it. It is a crucial component in electric vehicles to ensure that batteries do not get overcharged or over discharged, thus avoiding damage to the battery and harm to occupants.
The battery is a fundamental component of the electric vehicle, which represents a step forward toward sustainable mobility. The battery management system is a critical component of electric and hybrid electric vehicles. Its chief purpose is to ensure safe and reliable battery operation. As an engineering services provider, Cyient works closely with industry experts through our focus areas of megatrends—Sustainable Energy Solutions and Electrification.
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发表于 20-6-2023 04:40 PM
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本帖最后由 SuperKedah 于 20-6-2023 04:42 PM 编辑
所以, 你根本不懂電機電路圖上那上連接的線是幹嘛用的....
google 一點東西就以為全部....笑死人!
看懂了再來叫嗎, 不要浪費我的時間....
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发表于 20-6-2023 04:40 PM
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发表于 20-6-2023 04:43 PM
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中國的EV多採用永磁同步電機, tesla 早期都採用交流異步電機,
兩者天差地遠....BMS的設計也不可能會相同......
只有某個儍B堅持一樣的...它把BMS從整套系統獨立剝離出來...
然後堅持不相關!不懂裝懂的人,
大家不要聽它的....它只是來賣儍搞笑而己!
说了一大堆，就是比较电机不一样，来判断因此电池管理不一样。
完全把不一样的东东混在一起讲，笑死人！
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发表于 20-6-2023 05:08 PM
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说了一大堆，就是比较电机不一样，来判断因此电池管理不一样。
兩者的特性曲線差那麼多, 電池管控要作好才能發揮各電機的能力.....
上圖自己看, 看得懂就懂, 看不懂就看不懂....不多言.
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发表于 20-6-2023 05:15 PM
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即便都是相同的永磁電機...也會因規格上差異而呈現不同的結果,
那是要大量實驗求出其特性曲線, 輸入ECU內的 ROM,
然後由ECU搭配BMC內的MCU執行演算法, 取得最佳的供電的能力!!!!
你那一點點的Google的知識就算了....不要不懂裝懂!
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发表于 20-6-2023 05:20 PM
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我指的是Tesla在BMS內執行MCU的code.
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发表于 20-6-2023 05:36 PM
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发表于 20-6-2023 05:39 PM
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根本就是两回事！
你连电池管理本身的目的和方向都搞错，一直在那里强调电机。
还是回家做功课了再来谈！
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发表于 20-6-2023 05:41 PM
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都說了, 你甚麼都不懂...你貼的只是談到BMS管控電池的部份,
它只是冰山一角....
算了啦...不用再去google了啦! 真的笑死人!
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发表于 20-6-2023 05:41 PM
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发表于 20-6-2023 06:02 PM
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本帖最后由 SuperKedah 于 20-6-2023 06:03 PM 编辑
這圖就清楚展示, BMS是要和motor 的power train controller 透過CAN network來溝通,
另一個就是也要和ECU溝通, ECU則摘取Energy Demand controller的資料................
總的來說, 要把Motor與battery 發揮最大的效率與效能,
ECU, Power Train Controller, Energy Demand Controller, BMS都要不停的相互合作!
有人只甚麼都不懂, 卻在扮專家,
google 網上的片斷就在裝高手.
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发表于 20-6-2023 06:12 PM
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你连电池管理本身的目的和方向都搞错，一直在那里强调电机。
有人因為不懂, 只會google 片斷, 就以為它就是全貎,
瞎子摸象, 卻大小聲的說他是對的.
大家看以下的圖就明白.
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发表于 20-6-2023 06:18 PM
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本来就是只谈电池管理，没有人和你说电机。
要说冰山一角，你不会整辆车的引擎都拉进来啦笨！
算了啦...不用再去google了啦! 真的笑死人!
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发表于 20-6-2023 06:19 PM
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发表于 20-6-2023 06:25 PM
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本帖最后由 SuperKedah 于 20-6-2023 06:28 PM 编辑
一體有兩個大功能, 怎樣? 不就證明我是對的, 電機不一樣, BYD根本不可能去抄用Tesla的專利,
對電池管理....大家用的電池和Tesla 又不一樣, 電池管理也不可能一樣!
抄Tesla專利只是一個惡意傳聞!
因此, 我證明了, Tesla 在這部份的專利, 對中國企業毫無用處, 而你的說法:
更是胡扯畫唬爛!
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