共查询到20条相似文献,搜索用时 140 毫秒
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目前,有不少摩托车蓄电池生产企业都存在着退货率偏高的问题,严重制约着生产的发展。从对退货产品的技术分析发现,不少退货产品本身没有质量问题,而是摩托车充电系统和电器元件不符合蓄电池的性能要求以及部分消费者对蓄电池使用知识缺乏了解,导致蓄电池不能在合适的条件下正常使用而造成的。根据蓄电池的技术条件,摩托车电池正确的充电电压应 相似文献
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浅谈免维护蓄电池使用及检修 总被引:1,自引:0,他引:1
1免维护蓄电池的工作性能MF(MaintenaceFree)系列蓄电池——免维护蓄电池,是指在使用过程中不需要维护或只进行少量维护便能正常使用的蓄电池。该电池不用像开放型蓄电池那样补充液量和水分,电解液浸入到阴极间的隔板中,即使蓄电池倾斜,电解液不会流出。 相似文献
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提出了一种基于决策树算法的异常电池精准定位和分类方法,帮助人们在电池维修或更换时能够迅速确定故障单体的位置和类型,从而实施准确的维修更换方法,提高故障处理的效率。搭建电池仿真模型获取异常电池的充放电循环数据;以电压数据为基础,训练用于异常电池分类的决策树算法,使用试验数据和云端实车数据对构建的模型进行验证。验证结果表明,该方法能够准确判断异常电池单体在电池组中的位置和异常类型。在不同验证数据上,该方法的分类准确率高达98%以上,能够有效筛选出动力电池组中的异常电池。该结果说明了提出的决策树算法在动力电池异常分类中的有效性和准确性。 相似文献
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基于燃料电池客车行驶特性和其能量流控制策略对镍氢蓄电池组的功能需求,依据试验数据分析了镍氢蓄电池脉冲功率容量、可用能量与放电深度的关系特性,从脉冲功率容量、充放电能量和放电深度等方面对燃料电池客车进行蓄电池组性能匹配。装车实践表明,该匹配方法高效可行,不仅极大地提高了车辆的机动性和制动能量回馈吸收,而且避免了以往蓄电池频繁处于过充过放状态的缺陷,提高了蓄电池性能并延长了其使用寿命。 相似文献
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This paper offers novel insights to the design and implementation of an innovative state-of-charge (SOC) estimator for the lithium-ion (Li-Ion) series battery pack. The most interesting feature of this approach is that it can utilize information from each filtered terminal voltage of the Li-Ion cells connected in series for SOC estimation of the battery pack. Without actual sensing each discharging/charging current (DCC) applied to the Li-Ion cells, it is possible to extract each DCC estimation from the corresponding filtered terminal voltages with an equivalent electrical circuit model (EECM) identification of all Li-Ion cells in the battery pack. There are two advantages to SOC estimation of the battery pack with this approach. First, the proposal can be implemented simply and effectively, reducing the computational steps required for SOC estimation. By reducing computational steps, the proposal is expected to be more cost-effective. Second, the approach guarantees an improved SOC performance, even if the battery pack results in inevitable cell-to-cell variation among Li-Ion cells. Accordingly, there are fewer differences to previously estimated DCCs among Li-Ion cells. Specifically, all values from the estimated DCCs are properly compensated for by simultaneous parameter modification according to each cell’s electrochemical characteristics. Experimental results clearly demonstrate that our DCC sensorless SOC estimator provides robust SOC performance for the battery pack. This approach considered an experimental battery pack (12S1P) connected in series using 2.6 Ah LiCoO2 cells produced by Samsung SDI. 相似文献
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Rahman Ataur Mohammed Nurul Amin Hawlader Helmi Khalid 《International Journal of Automotive Technology》2017,18(5):875-882
Electric vehicle’s motor draws power from battery to meet its power demand in different road profiles. Battery high discharged currents are causes of warming battery’s cells. The temperature of 40 ºC and above reduces battery life span. The rationale of fuzzy controlled evaporative battery thermal management system (EC-BThMS) development from this study is to control the battery temperature in the range of 20 ~ 40 ºC both in charging/discharging modes. The proposed system has been developed with estimating the total cooling loads and thermal behavior of the battery cells. A fuzzy controlling system has been introduced with the EC-BThMS to control the electro-compressor and the expansion valve based on the response of battery temperature sensors.A battery pack of 8.6 kWh equipped EV has been operated with 60 km/h on 0 % gradient and 40 km/h on 5 % gradient in IIUM campus while 130 km/h on 0 % gradient and 50 km/h on 3.67 % gradient in Malaysia International Formula circuit to study the battery temperature profile and percentage of battery power saving. Comparison has been made on the performance of EC-BThMS with air cooling battery thermal management system (AC-BThMS) by using same vehicle. Result shows that EC-BThMS can save energy 17.69 % more than AC-BThM 1 and 23 % more than AC-BThM 2. 相似文献
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锂离子电池管理系统及其均衡模块的设计与研究 总被引:1,自引:0,他引:1
针对混合动力汽车单体电池性能的不一致性造成的不利影响,设计了电池管理系统及其均衡模块.该系统采用单片机,对电池组参数进行实时精确采集并分析处理,再通过控制电路实现电池组的均衡充放电.试验结果表明,该系统不仅可使电池进行均衡充放电,而且能对电池的不一致性进行有效补偿,使各个电池都发挥出最优性能. 相似文献
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通过软件ADVISOR对燃料电池电动车和各子系统进行了建模并对整车性能进行了仿真。仿真结果显示,在某种混合度下整车燃料经济性较高。通过仿真过程分析,描述了不同行驶循环的动力性要求、两供能部件效率以及混合度三者之间的相互影响和复杂关系,并给出了结论。 相似文献
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G. Y. Cho J. W. Choi J. H. Park S. W. Cha 《International Journal of Automotive Technology》2014,15(5):795-803
A transient numerical model of a lithium ion battery (LiB) pack with air cooled thermal management system is developed and validated for electric vehicle applications. In the battery model, the open circuit voltage and the internal resistance map based on experiments are used. The Butler-Volmer equation is directly considered for activation voltage loss estimation. The heat generation of cells and the heat transfer from cells are also calculated to estimate temperature distribution. Validations are conducted by comparison between experimental results at the cell level and the pack level. After validations, the effects of module arrangement in a battery pack are studied with different ambient temperature conditions. The configuration that more LiB cells are placed near the air flow inlet is more effective to reduce the temperature deviation between modules. 相似文献
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电动汽车电池组离散特性的建模与分析 总被引:1,自引:0,他引:1
提出了一种基于电池能量状态的串联电池组离散度的概念,建立了用离散度描述串联电池组离散特性的数学模型,并就离散度及其模型的应用和计算进行了分析。 相似文献
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针对传统锂离子电池组容量确定方法存在的效率低、能耗高且只能离线应用等问题,提出一种基于电池剩余充电电量的锂离子电池组容量快速估计方法。首先,基于充电电压曲线一致性原理,以电池组内率先充电至充电截止电压的电池单体电压曲线为基准,通过电压曲线的平移缩放与线性插值计算出各单体电池的剩余充电电量与剩余充电时间,从而实现各单体电池的荷电状态(State of Charge, SOC)在线估计,在此基础上实现电池组容量的快速估计。其次,在电池单体模型的基础上建立电池组的仿真模型,并在全SOC区域上对模型参数进行分段辨识。通过所建立的仿真模型得到电池组的充放电曲线,并对电池组容量进行估计。最后,对4个单体串联而成的电池组进行充电试验。研究结果表明:仿真容量与估计容量误差为1.2%以内,验证了所提出的容量快速估计算法的有效性;利用所提方法估计出电池组容量与试验得到的电池组容量的误差为2.61%;该方法根据电池充电曲线的平移与缩放即可在线估计出电池组容量,可应用于新电池组容量的在线快速估计,能在保证3%估计误差的基础上将检测效率提高到传统方法的2倍以上。 相似文献