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Determination of a core cell temperature of an energy store

A technology of core temperature and accumulators, applied in secondary batteries, circuits, electrical components, etc.

Active Publication Date: 2012-05-23
BAYERISCHE MOTOREN WERKE AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, especially in thicker constructed cells, other geometries such as prismatic or pouch geometries have similar problems

Method used

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  • Determination of a core cell temperature of an energy store
  • Determination of a core cell temperature of an energy store
  • Determination of a core cell temperature of an energy store

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Embodiment Construction

[0046] The presented equations allow the battery core temperature of the energy store to be determined with high precision by means of easily detectable parameters. Typically sensors for detecting these parameters are already present in the accumulator.

[0047] The energy store can in particular be a high-power energy store or a high-energy energy store.

[0048] Furthermore, the proposed equation has the advantage that it can be implemented resource-efficiently on the controller and does not place high demands on external memory and / or computing performance.

[0049] The general multidimensional heat equation is:

[0050] ρ · C p · ∂ T ∂ t = ▿ → · ( λ · ▿ → ( ...

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Abstract

The invention relates to a method for determining a core cell temperature of an energy store, wherein the energy store comprises at least one cell, wherein a temperature of the cell is measured; wherein a volumetric heat is determined; wherein the core cell temperature is determined based on a geometry of the cell. The invention further relates to a corresponding device and a vehicle having such a device.

Description

technical field [0001] The invention relates to a method and a corresponding device for determining the battery core temperature of an energy store. It also relates to a vehicle with such a device. Background technique [0002] Battery-based energy stores, such as high-power energy stores or high-energy energy stores, which are used, for example, in hybrid vehicles, generate waste heat not only during charging but also during discharging. In order to ensure the highest possible service life of the energy storage, the maximum temperature of the individual cells, which often occurs in the cell core, should not exceed a predetermined limit temperature (for example, 40° C. to 50° C.) during operation. It is therefore necessary to actively cool the batteries of the accumulator. [0003] The heat that the battery needs to dissipate is mainly affected by the behavior of the hybrid vehicle (acceleration, deceleration, recuperation, etc.). The temporal profile of this behavior is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/48
CPCY02E60/12H01M10/486Y02E60/10
Inventor A·迈耶林N·弗拉奥
Owner BAYERISCHE MOTOREN WERKE AG