Pure electric bus nickel metal hydride battery pack

Abstract

The invention discloses a nickel-metal hydride battery pack for a pure electric bus, and belongs to the technical field of an electrocar power supply. The nickel-metal hydride battery pack comprises single batteries, partition plates and battery connection plates, and also comprises unit connection plates, wherein the single batteries are connected in parallel to form battery units through the battery connection plates; the battery units are connected in series to form battery modules through the unit connection plates; the battery modules are connected in series to form a battery box through the unit connection plates. The nickel-metal hydride battery pack for the pure electric bus is simple in structure and easy to assemble, the heat radiating area is increased by parallel connection, a small amount of heat is generated by in -parallel shunting, the nickel-metal hydride battery pack is high in volumetric specific energy and gravimetric specific energy, quick to accelerate the bus, strong in startability, good in thermal diffusivity of the battery pack, safe and reliable, and the power requirements of the pure electric bus can be met.

Description

technical field

[0001] The invention relates to a battery pack, in particular to a battery pack for a bus, and belongs to the technical field of electric vehicle power supplies. Background technique

[0002] The power supply of pure electric buses needs to be equipped with battery packs with high voltage (600V) and large capacity (300~500Ah). However, due to the inconsistency of battery capacity, internal resistance, and voltage, according to the conventional combination of nickel-hydrogen battery packs, it is impossible to combine batteries in parallel to increase capacity; the only way is to make large-capacity single batteries, and then carry out Connected in series to meet the high voltage requirements of the battery pack. However, super-large-capacity single batteries are not only difficult to manufacture and have a high scrap rate, but more importantly, the heat inside the battery is not easy to dissipate during the charging and discharging process of the battery, whi...

Examples

Embodiment Construction

[0010] Below in conjunction with embodiment the present invention is further described.

[0011] see figure 1 , a pure electric bus nickel metal hydride battery pack, including a single battery 1, a separator 2 and a battery connecting plate 3, and also includes a unit connecting plate 4, the single battery 1 is connected in parallel by the battery connecting plate 3 to form a battery unit 5; the battery unit 5 The unit connection plates 4 are connected in series to form battery modules 7 , and the battery modules 7 are connected in series to form a battery box by the unit connection plates 4 .

[0012] The internal resistance of each single battery 1 in the battery unit 5 is the same. The capacity of each battery unit 5 in the battery module 7 is the same. There are three single cells 1 in the battery unit 5 . A clamp 6 is provided on the battery module 7 . The partition plate 2 is a through-hole fixed plate formed by injection molding of flame-retardant PP material.

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technical field

[0001] The invention relates to a battery pack, in particular to a battery pack for a bus, and belongs to the technical field of electric vehicle power supplies. Background technique

[0002] The power supply of pure electric buses needs to be equipped with battery packs with high voltage (600V) and large capacity (300~500Ah). However, due to the inconsistency of battery capacity, internal resistance, and voltage, according to the conventional combination of nickel-hydrogen battery packs, it is impossible to combine batteries in parallel to increase capacity; the only way is to make large-capacity single batteries, and then carry out Connected in series to meet the high voltage requirements of the battery pack. However, super-large-capacity single batteries are not only difficult to manufacture and have a high scrap rate, but more importantly, the heat inside the battery is not easy to dissipate during the charging and discharging process of the battery, whi...

Examples

Embodiment Construction

[0010] Below in conjunction with embodiment the present invention is further described.

[0011] see figure 1 , a pure electric bus nickel metal hydride battery pack, including a single battery 1, a separator 2 and a battery connecting plate 3, and also includes a unit connecting plate 4, the single battery 1 is connected in parallel by the battery connecting plate 3 to form a battery unit 5; the battery unit 5 The unit connection plates 4 are connected in series to form battery modules 7 , and the battery modules 7 are connected in series to form a battery box by the unit connection plates 4 .

[0012] The internal resistance of each single battery 1 in the battery unit 5 is the same. The capacity of each battery unit 5 in the battery module 7 is the same. There are three single cells 1 in the battery unit 5 . A clamp 6 is provided on the battery module 7 . The partition plate 2 is a through-hole fixed plate formed by injection molding of flame-retardant PP material.

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