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Fault detection method and system of battery pack

A fault detection and battery pack technology, applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., it can solve the problem of limited number of temperature acquisition ports, inability to collect cell temperature data, and inability to accurately reflect the status of battery cells and other problems to achieve the effect of avoiding short circuits

Pending Publication Date: 2019-04-26
AULTON NEW ENERGY AUTOMOTIVE TECHNOLOGY GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to overcome the fact that the fault judgment method of the battery management system in the prior art is limited by the number of temperature acquisition ports, which cannot collect the temperature data of all battery cells, so it cannot accurately reflect the status of all battery cells defects, providing a battery pack fault detection method and system

Method used

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  • Fault detection method and system of battery pack
  • Fault detection method and system of battery pack
  • Fault detection method and system of battery pack

Examples

Experimental program
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Effect test

Embodiment 1

[0051] The fault detection system of the battery pack of this embodiment is used to realize the fault detection of the battery pack, wherein the battery pack includes at least one battery cell. Such as figure 1 As shown, the fault detection system of this embodiment includes: an optical fiber detector 1 and a controller 2. The optical fiber detector 1 is arranged on the outer surface of each cell, and is used to detect the temperature value of the cell and send the temperature value to the controller. The controller 2 determines whether the temperature value is within the preset temperature range, and generates an alarm message when the determination is yes.

[0052] It should be noted that different types of batteries have different battery usage scenarios and different requirements for fault judgment. Therefore, the preset temperature range needs to be set according to the battery type and usage scenario.

[0053] In this embodiment, the light detector includes an optical fiber,...

Embodiment 2

[0062] The present invention also provides a fault detection method for a battery pack, which is implemented using the fault detection system of implementation 1, such as figure 2 As shown, the fault detection method includes the following steps:

[0063] Step 101: The optical fiber detector detects the temperature value of the battery core.

[0064] Step 102: The controller determines whether the temperature value is within a preset temperature range. If the judgment is no, then no action; if the judgment is yes, then step 103 is executed.

[0065] Step 103: Generate alarm information.

[0066] Wherein, the temperature value includes a maximum temperature and / or a minimum temperature and / or a temperature difference within a preset time period. Among them, the temperature difference is the difference between the maximum temperature and the minimum temperature.

[0067] In this embodiment, the optical fiber is arranged on each battery cell to realize the temperature data collection of...

Embodiment 3

[0069] Example 3 is basically the same as Example 2, such as image 3 As shown, in this embodiment, step 101 further includes:

[0070] The optical fiber detector detects the strain value of the cell.

[0071] Step 102 also includes:

[0072] The controller judges whether the strain value is within the preset strain range.

[0073] In this embodiment, after step 103, the method further includes:

[0074] Step 104: Store the alarm information in the memory.

[0075] In this embodiment, not only the temperature of the battery pack is detected, but also the deformation detection of the battery pack is realized, that is, the deformation and strain of the box of the battery pack when a variety of extreme abnormal accidents such as a vehicle collision occurs. Detect to avoid short circuit of internal high voltage battery caused by deformation of battery box. In this embodiment, the failure of the battery pack is predicted simultaneously by the strain value and the temperature, which can furt...

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Abstract

The invention discloses a fault detection method and system of a battery pack. The fault detection method includes the following steps that S1, the temperature values of cores are detected through anoptical fiber detector; S2, a controller judges whether the temperature values are within a preset temperature range or not, and if yes, alarm information is generated. Temperature data of each core is acquired, the states of all the battery cores can be accurately reflected, battery faults are checked in time, and battery short circuits and potential safety hazards such as personnel electric shocks and fire are avoided.

Description

Technical field [0001] The invention relates to a fault detection method and system for a battery pack. Background technique [0002] In electric vehicles, the power battery pack is the core component that affects the vehicle's power performance, cruising range, cost and other key indicators. The battery pack is mainly managed and maintained through the battery management system. The fault judgment method of the battery management system generally uses several slave controllers to collect the temperature of the battery pack and report it to the main controller. The main controller makes logical judgments. This method is limited by the number of temperature collection ports, which cannot collect all battery cells. Temperature data cannot accurately reflect the status of all battery cells. If the fault cannot be detected in time, the battery pack may have major safety hazards. Summary of the invention [0003] The technical problem to be solved by the present invention is to overco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/382G01R31/396
Inventor 李攀白玉凤李巍翁志福兰志波张建平
Owner AULTON NEW ENERGY AUTOMOTIVE TECHNOLOGY GROUP
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