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Battery pack and electric vehicle

A battery pack and battery technology, applied in electric vehicles, batteries, battery pack components, etc., can solve the problems of easy movement of the pole core in the casing, easy occurrence of safety problems, detachment of the active material layer, etc., to increase the volume. Effectiveness of utilization rate, internal space saving, safety performance improvement

Active Publication Date: 2020-02-21
BYD CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the existing method, in order to increase the capacity of the single battery, multiple pole cores are connected in series in the shell of the single battery. Under the condition of vibration and bumps, the multiple pole cores are easy to move in the shell, and the pole cores and the pole cores are connected in series. There will be relative displacement between the cores, which will cause damage to the pole core, for example, the current collector is damaged, the separator is wrinkled, the active material layer on the pole piece falls off, the stability of the battery is poor, and safety problems are prone to occur
At the same time, the single battery will expand, and there are also safety issues

Method used

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  • Battery pack and electric vehicle
  • Battery pack and electric vehicle
  • Battery pack and electric vehicle

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Embodiment Construction

[0055] Embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary, and are only for explaining the present application, and should not be construed as limiting the present application.

[0056] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Rear", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Axial", "Radial", "Circumferential" The orientation or positional relationship indicated by etc. is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the application and simplif...

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Abstract

The invention provides a battery pack and an electric vehicle. The battery pack comprises a battery sequence which comprises a plurality of single batteries. The thickness of each single battery extends along a first direction, and the plurality of single batteries are sequentially arranged along the first direction to form the battery sequence. At least one single battery comprises a metal casingbody and a pole core packaged in the metal casing body. The air pressure in the metal casing body is lower than the air pressure outside the metal casing body. A gap is formed between at least two adjacent single batteries, and the proportion range of the gap to the thickness of the single batteries is 0.001 to 0.15. The battery pack provided by the invention is relatively high in energy density,and the safety performance is greatly improved.

Description

technical field [0001] The invention belongs to the field of batteries, in particular to a battery pack and an electric vehicle. Background technique [0002] Existing battery packs used in electric vehicles usually include multiple single cells to increase battery capacity, and the multiple single cells are installed in the battery pack casing. [0003] In the existing method, in order to increase the capacity of the single battery, multiple pole cores are connected in series in the shell of the single battery. Under the condition of vibration and bumps, the multiple pole cores are easy to move in the shell, and the pole cores and the pole cores are connected in series. There will be relative displacement between the cores, which will cause damage to the pole core, for example, the current collector is damaged, the separator is wrinkled, the active material layer on the pole piece falls off, the stability of the battery is poor, and safety problems are prone to occur. At t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/10H01M2/20H01M10/42
CPCH01M10/42H01M2220/20H01M50/112H01M50/24H01M50/20Y02T10/70B32B7/12B32B2457/10B32B27/34B32B3/266B32B27/36B32B2307/7244B32B15/20B32B2307/7246B32B2307/732B32B15/088B32B3/30B32B15/09B32B15/085B32B27/08B32B27/32H01M50/124H01M50/249H01M50/548H01M50/51H01M50/209H01M50/121Y02E60/10H01M50/119H01M50/244B32B2311/24H01M50/394H01M50/224H01M50/271
Inventor 何龙孙华军胡世超敖志勇朱燕
Owner BYD CO LTD
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