电池循环测试仪 - 检测高压电池

为此专门开发的测试设备，即电池循环测试仪，可以分析电池的功能。在一段时间内测量电池在充放电循环期间的性能。

主要应用事实

领域

储能/电动汽车

应用

在交付前分析充电和放电过程，或者检查电动汽车的充电状态是否正确

测量参数

高达 2000 V DC（和更高的）电压

主要要求

可选择直流测量设置（高达 2000 V DC）

直流电流测量（通过分流电压）

精确转换为标准控制信号

通过完全隔离电池和检测设备之间的危险电压确保安全

可配置频率响应（10 Hz 至 10 kHz）

安全高效测量高性能电池

应用说明

在电池测试过程中，通过 HIL 配置（硬件在环）持续模拟充电和放电过程（电池循环），该配置与电动汽车运行期间的典型使用情况相对应。所测量的一系列参数包括容量、电池的效率和自放电。

示意图所示为 Knick 产品的三个主要方面：

“均衡电压” – 确保电池的电压与循环测试仪中看见的电压一样。一旦完成均衡，就闭合电池和循环测试仪之间的开关，以便进行充/放电操作。
将电池循环测试仪的电压和电流传输给 DAQ（数据采集）或者 PLC。这对于最终用户来说更加透明。
电池循环测试仪配有直流驱动装置。这在电路图中通过 Breakout Box 予以表示。变送器有助于实现非常重要的“电压和电流反馈”应用。这些产品将代表实际提供的电压和电流的控制信号返回到直流驱动装置。
从而确保驱动装置预期的功率与实际功率一致，并且不会有短路。

应用的要求

在电池循环测试仪上进行精确、快速的直流电压和电流测量对于有效功能至关重要。必须始终保证操作人员和测量设备的安全，因为这些应用中所使用的电压越来越高，目前高达 2000 V DC。

如果开关柜中的安装空间也有限（对于生产中的检测设备往往如此），并且需要同时检测许多电池电芯，那么高压变送器的结构型式也非常重要。尺寸小并且方便安装在安装导轨上，是用于此类情况的决定性因素。

为何选择 Knick?
Knick P42000 高压变送器专为测量功率电子装置的电路而设计，能将高达 2000 V DC 的电压安全转换成 ±20 mA、±10 V 或 4 … 20 mA 的标准输出信号。该设备的性能特征已在发电领域的诸多其他高压应用中久经考验，因此，也适用于要求苛刻的储能和电动汽车应用。
Knick P41000 高压变送器与分流电阻相结合，可测量高达 20 kA 的直流电流。连续隔离电压高达 3.6 kV。可将分流电压（例如 +/- 50 mV、60 mV、100 mV）转换成 +/- 20 mA、+/- 10 V 或 4 … 20 mA 的标准输出信号。由于其高性能规格，十分适合于关键的储能和电动汽车应用。

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电池循环测试仪 - 检测高压电池

主要应用事实

领域

应用

测量参数

主要要求

安全高效测量高性能电池

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