A cold start method, device and equipment

A cold-start, battery-threshold technology, used in battery/fuel cell control devices, electric vehicles, transportation, and packaging, to solve problems such as poor low-temperature discharge characteristics, additional cost, and operational complexity

Active Publication Date: 2021-09-14
ZHEJIANG GEELY AUTOMOBILE RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cold start performance of the unassisted method needs further research, because the auxiliary cold start components will increase the volume and weight of the system, as well as the complexity and additional cost of operation. There are not many experimental and simulation studies on cold start. Especially cold start without auxiliary heat source needs more research and effort
Many well-known automobile companies are working on improving the performance of cold start. It is generally believed that the auxiliary power heating start method can improve the reliability and cold start performance of cold start, but the auxiliary power heating start method requires an additional battery to heat the auxiliary power. Module power supply
However, the low-temperature discharge characteristics of commonly used batteries and lithium batteries are not good. If the auxiliary power supply does not have a high enough remaining power (SOC) when the system is shut down, it may cause cold start failure.

Method used

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  • A cold start method, device and equipment
  • A cold start method, device and equipment

Examples

Experimental program
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Effect test

Embodiment 1

[0059] Embodiment 1 provides a cold start method, such as figure 1 shown, including:

[0060] S101. Acquiring the current temperature of the fuel cell when a shutdown request of the fuel cell is received;

[0061] S102. Judging whether the current temperature is lower than a preset cold start temperature;

[0062] If the current temperature is lower than the preset cold start temperature, then obtain the current power of the auxiliary battery;

[0063] S103. Judging whether the current power is lower than the cold start power threshold of the auxiliary battery;

[0064] If the current power is not lower than the cold start power threshold, shut down the fuel cell according to the shutdown request;

[0065] If the current power is lower than the cold start power threshold, the fuel cell provides power to the auxiliary battery.

[0066] S104. If the current temperature is not lower than the cold start temperature, determine whether a low temperature shutdown request is recei...

Embodiment 2

[0080] The second embodiment provides a cold start device, such as figure 2 shown, including:

[0081] A temperature acquisition unit S200, configured to acquire the current temperature of the fuel cell;

[0082] A first judging unit S300, configured to judge whether the current temperature is lower than a preset cold start temperature;

[0083] The first execution unit S400 is configured to obtain the current power of the auxiliary battery when the current temperature is lower than the preset cold start temperature, and judge whether to shut down the fuel cell according to the shutdown request based on the current power;

[0084] The second judging unit S500 is used to judge whether the current power is lower than the cold start power threshold of the auxiliary battery;

[0085] The second execution unit S600 is configured to shut down the fuel cell according to the shutdown request when the current power level is not lower than the cold start power threshold;

[0086] Th...

Embodiment 3

[0102] Embodiment 2 provides a cold start device, including:

[0103] A temperature acquisition device, used to acquire the current temperature of the fuel cell;

[0104] a fuel cell controller, configured to control whether the current temperature is lower than a preset cold start temperature;

[0105] A power acquisition device for obtaining the current power of the auxiliary battery;

[0106] an auxiliary battery controller, configured to control whether the current power is lower than the cold start power threshold of the auxiliary battery;

[0107] a fuel cell controller, configured to control the fuel cell shutdown according to the fuel cell shutdown request when the current power is not lower than the cold start power threshold;

[0108] A fuel cell controller, configured to control the fuel cell to supply power to the auxiliary battery when the current power is lower than the cold start power threshold.

[0109] In some embodiments, the device further includes a dat...

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Abstract

The present invention relates to the technical field of vehicle cold start, in particular to a cold start method, device and equipment, including acquiring the current temperature of the fuel cell when receiving a shutdown request of the fuel cell; judging whether the current temperature is lower than a preset cold start temperature start temperature; if the current temperature is lower than the preset cold start temperature, obtain the current power of the auxiliary battery, and judge whether to shut down according to the shutdown request of the fuel cell based on the current power; judge whether the current power is is lower than the cold start power threshold of the auxiliary battery; if the current power is not lower than the cold start power threshold, shut down the fuel cell according to the shutdown request; if the current power is lower than the cold start power threshold, the The fuel cell provides electricity to the auxiliary battery. The invention adopts the fuel cell to continuously provide electric power for the auxiliary battery, so as to avoid the failure of cold start caused by the insufficient electric power of the auxiliary battery.

Description

technical field [0001] The invention relates to the technical field of vehicle cold start, in particular to a cold start method, device and equipment. Background technique [0002] With the depletion of traditional energy, the development and utilization of new energy has attracted more and more attention. The development of new energy vehicles is the future direction, among which fuel cell vehicles are an important development direction of new energy vehicles, and proton exchange membrane hydrogen fuel cells are A more reasonable choice of fuel cells for vehicles. At present, the low-temperature cold start of hydrogen fuel cells is a difficult point in the industry. When the temperature inside the fuel cell is lower than freezing point, if the water produced by the fuel cell reaction freezes inside, the reaction will stop and may affect the membrane electrode. The structure is damaged. [0003] The cold start process of the prior art is divided into the following three st...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): B60L58/31B60L58/32
CPCY02T90/40
Inventor刘龙李健韩旭翁鹏程朱敏婧陈骋
OwnerZHEJIANG GEELY AUTOMOBILE RES INST CO LTD