Power battery air cooling control strategy based on vehicle-mounted navigation system

A technology for power batteries and vehicle navigation, which is applied to secondary batteries, circuits, electrical components, etc., and can solve problems such as fan heat dissipation lag

Active Publication Date: 2020-10-27
NANJING AGRICULTURAL UNIVERSITY
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  • Abstract
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  • Application Information

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Problems solved by technology

However, the control strategy of relying solely on the battery temperature collected by the battery temperature sensor to determine the worki...

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  • Power battery air cooling control strategy based on vehicle-mounted navigation system
  • Power battery air cooling control strategy based on vehicle-mounted navigation system
  • Power battery air cooling control strategy based on vehicle-mounted navigation system

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Embodiment Construction

[0031] The content of the present invention will be described in detail below in conjunction with the technical solutions and drawings, wherein the schematic examples and descriptions are only used to explain the present invention, but not as a limitation to the present invention.

[0032] figure 2 It is a schematic diagram of the actual working condition of the vehicle driving path. In order to display the working condition information more intuitively, the present invention presents the road surface elevation and spacing of each sampling point in each road section in the form of road slope figure 2 middle.

[0033] S1: When the driver selects the driving route of the vehicle according to the vehicle navigation system, the navigation system will predict the length of the entire route and the driving time; Estimated passing time, traffic flow, road elevation, intersection signal lights, road speed limit and other information.

[0034] S2: According to the information prov...

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Abstract

The invention relates to a power battery air cooling control strategy based on a vehicle-mounted navigation system. The power battery air cooling control strategy specifically comprises the steps thatS1, the vehicle-mounted navigation system forecasts working condition information of a future road section; S2, the average speed and gradient of the future road section are calculated; S3, an automobile kinetic model is established by utilizing the average speed and the gradient; S4, the future required power of the power battery is calculated; S5, the future charging and discharging current ofthe power battery is calculated; S6, a future temperature rise prediction model of the power battery is established by combining heat generation and heat transfer mechanisms of the power battery; S7,the control system determines whether to start a fan or not according to the future temperature rise; S8, if the fan needs to be started, a dynamic planning algorithm determines the forced fan starting opportunity and the starting wind speed; and S9, air cooling heat dissipation treatment is conducted on the power battery according to the fan starting time and the wind speed which are obtained through dynamic planning. The invention provides a universally applicable air cooling control strategy for the power battery, and the energy consumption of the fan can be reduced as much as possible while the heat dissipation requirement of the power battery is met.

Description

Technical field: [0001] The invention relates to the technical field of thermal management of power batteries of electric vehicles; in particular, it relates to a power battery air cooling control strategy based on a vehicle navigation system. Background technique: [0002] At present, the power batteries of new energy vehicles are mostly lithium batteries, and the performance of lithium batteries is easily affected by the battery temperature. Once the temperature is too high, the capacity and cycle life of the battery will decrease, and even cause the car to burn and explode. In addition, the power battery during operation continuously undergoes charge and discharge reactions to meet the power requirements of the vehicle, thereby accumulating a large amount of heat. If the heat cannot be discharged in time, it will aggravate the accumulation of battery pack temperature. Therefore, the power battery pack during operation must be Timely and effective heat dissipation. Among...

Claims

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Application Information

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IPC IPC(8): H01M10/613H01M10/625H01M10/633H01M10/6563
CPCH01M10/613H01M10/625H01M10/633H01M10/6563Y02E60/10Y02T10/70
Inventor 赵国柱招晓荷高茂庆
Owner NANJING AGRICULTURAL UNIVERSITY
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