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HYBRID AND HV ELECTRIC CHALLENGES
| 题名： | HYBRID AND HV ELECTRIC CHALLENGES |
| 正文语种： | eng |
| 作者： | G. JERRY TRUGLIA |
| 作者单位： | US Environmental Protection Agency |
| 摘要： | This 750Li was towed in as a no-start from another shop (who received it from a BMW dealer). BMW's ActiveHybrid vehicle uses a unique system that looks a bit different than most hybrids. One of the main differences is that the heart of the system (the HV battery) is laser-welded and cooled by air conditioning (Figure 1). The HV battery consists of 35 lithium cells that produce 3.6 volts each, for a total of 126 volts. BMW uses a 30/80 percentage state-of-charge strategy. When the charge is under 30%, a Check Control message will be displayed to alert the driver. This HV lithium battery houses an ECU, electromechanical switch contactors, connectors for the HV and low voltage cables, connections for refrigerant, and a vent. The H V battery encompasses an IBS (Intelligent Battery Sensor) that measures HV voltage nand charge/discharge current, along with battery cell temperature. This information is important to understand, since this component is the most probable cause of the no-start condition. |
| 出版年： | 2022 |
| 期刊名称： | Motor age |
| 卷： | 141 |
| 期： | 1 |
| 页码： | 23-24,26-28 |
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