Outer casing member for preventing electricity leakage, and battery pack for vehicle comprising same
一种电池组、侧盖的技术，应用在电池组零部件、电池、电池盒/外套等方向，能够解决无法防止漏电等问题，达到维持不下降、维持功率特性的效果
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Embodiment 1
[0034] As shown in Table 1 below, use PBT (polybutylene terephthalate, manufacturer: LG Chem, product name: LUPOX GP1000H) alone, or use glass fiber (glass fiber, manufacturer: Saint-Gobain-Witterdijk) Si, product name: SGVA910) is 43% by weight, PBT is 57% by weight to mix the mixture to form the side cover of the battery pack, and then place it in water at normal temperature for 3 days, 7 days, 10 days, 30 days days, then measure the weight change and calculate the moisture content.
[0035] And, after setting the terminal on the surface of the side cover, it was placed in a chamber under high humidity conditions (temperature: 25° C., relative humidity: 90%) for 3 days, 7 days, 10 days, and 30 days, and then Measure conductivity.
[0036]In this case, the conductivity measurement method used is a general probe method. More specifically, after four electrodes are arranged at a certain distance, a certain current is passed, and then the potential difference between the two e...
Embodiment 2
[0053] Such as figure 1 As shown, using the side cover manufactured in Example 1, a hybrid vehicle battery pack formed by stacking 72 unit cells was manufactured, and charged and discharged under high humidity conditions (temperature: 25°C, relative humidity: 90%) , directly connected to the terminals on the side cover to measure the power of the entire group. The charge-discharge test measures the power by a hybrid pulse power characterization (HPPC) mode, and then measures the open circuit voltage (open circuit voltage, OCV) when it is fully discharged after the measurement. The results are shown in Table 3 below .
[0054]
[0055] 【table 3】
[0056] * Power reduction rate = (power reduction part) / (power before placement) * 100
Embodiment 3
[0064] 43% by weight of glass fiber (glass fiber: GF, manufacturer: Saint-Gobain-Vittex, product name: SGVA910) and 57% by weight of PBT (polybutylene terephthalate, manufacturer: LG Chemical, product name: LUPOX GP1000H) to manufacture the side cover of the battery pack, and then place it under high humidity (25°C, RH90%) for 3 days, 7 days, 10 days, and 30 days time, respectively, to be used, manufactured as figure 1 The battery pack of a hybrid electric vehicle formed by stacking 72 unit cells is shown. For each battery pack, the capacity was measured at a 1C rate, and the voltage drop of a specific unit cell was confirmed in a fully discharged state. The results are shown in Table 5 below. For comparison, nylon (manufacturer: Korea Nylon, product name: MC Nylon) instead of PBT was used, and the same method was applied for evaluation. As for the unit cell numbers, the unit cell adjacent to the side cover at one end was set to No. 1, and the unit cell adjacent to the side ...
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Abstract
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