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Intelligent charging method for vehicle-mounted storage battery

A storage battery and intelligent technology, applied in battery circuit devices, battery data exchange, current collectors, etc., can solve problems such as easy stratification of electrolyte, large measurement errors, and loss of power battery power, so as to avoid the decline of battery life and replenish power The effect of accurate detection and prevention of electric shock danger

Pending Publication Date: 2022-01-21
合众新能源汽车股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the above-mentioned intelligent charging method of the battery still has the following defects: the electrolyte of the flooded battery is easy to stratify, and the measurement error of the battery SOC is relatively large when the battery terminal voltage is used, which is easy to cause the power loss of the power battery due to frequent start-up of charging, resulting in battery life. The mileage is reduced; in addition, when the hood is opened, if the battery is being recharged at this time, the negative pole of the battery is disconnected, and the DC-DC is still working for recharging, which may easily lead to high-voltage electric shock for maintenance personnel

Method used

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  • Intelligent charging method for vehicle-mounted storage battery

Examples

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Embodiment 1

[0033] Embodiment one: if figure 1 As shown, it is only one of the embodiments of the present invention, a vehicle-mounted battery intelligent power supply method, suitable for vehicle-mounted battery intelligent power supply system, the system includes AGM battery, battery sensor IBS, body domain controller BDM, battery management unit BMS, DC-DC converter, and vehicle controller VCU. In the above system, the battery is an AGM battery. Compared with the traditional rich liquid electrolyte, the AGM battery will not be stratified, and it is convenient to detect its SOC (remaining power ); the battery sensor IBS is set at the negative pole of the AGM battery, and an intelligent switch is set between the battery sensor IBS and the negative terminal of the battery;

[0034] The method includes the following steps:

[0035] S1: Determine whether the front cover is in the open state, if so, the smart switch is turned off; otherwise, the smart switch is turned on, and step S2 is exe...

Embodiment 2

[0053] Embodiment two, such as figure 1 , 2 As shown, it is only one of the embodiments of the present invention. On the basis of Embodiment 1, in the method of intelligent power replenishment for the on-board battery of the present invention, when step S2 is executed, the battery sensor IBS transmits the SOC data of the AGM battery through the LIN line Send it to the body domain controller BDM.

[0054] And, when step S3 is executed, the body domain controller BDM sends the AGM battery SOC data to the vehicle controller VCU through the CAN network through a message;

[0055] Similarly, when step S5 is executed, the vehicle controller VCU sends a power-on command to the battery management unit BMS through the CAN network, and controls the DC-DC converter to work to supplement the AGM battery through the CAN network.

[0056] Also, when step S5 is executed, the positive pole of the DC-DC converter is connected to the positive pole of the AGM storage battery to supplement elec...

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Abstract

The invention provides an intelligent charging method for a vehicle-mounted storage battery, and relates to the technical field of vehicles, and the method comprises the following steps: S1, when a vehicle front cover is closed, an intelligent switch is closed; S2, a storage battery sensor detects the SOC of a storage battery and sends the SOC to a vehicle body domain controller S3, the vehicle body domain controller sends the SOC of the storage battery to the whole vehicle controller; S4, the vehicle control unit judges whether the SOC of the storage battery is lower than a preset threshold value or not, and if so, S5 is executed if not, the operation is not executed; S5, the vehicle control unit sends a power-on instruction to a battery management part and controls the DC-DC to charge the storage battery; and S6, the whole vehicle controller judges whether the whole vehicle is Ready or not; if so, power-on is stopped; and if not, continuing to execute the S5. According to the invention, the charging detection is accurate, errors existing in the measurement of the terminal voltage of the storage battery like a BMS are avoided, and the cruising ability reduction caused by the SOC of the storage battery due to frequent charging is effectively avoided; and the electric shock danger of maintenance personnel can be prevented.

Description

technical field [0001] The invention relates to the technical field of vehicles, [0002] In particular, the present invention relates to an intelligent charging method for a vehicle-mounted storage battery. Background technique [0003] With the development of technology, the use of cars is becoming more and more frequent. When the vehicle is not used for a long time or the vehicle is in the OFF gear but the owner leaves the vehicle and forgets to turn off the lights, or the owner forgets to turn off the ACC power when leaving the vehicle, etc., it will cause the vehicle 12V The battery is depleted, and eventually the vehicle cannot be started. It is necessary to replace the 12V battery or use an external power supply to restart, causing some difficulties in starting the vehicle and poor user experience. Therefore, it is necessary to increase the capacity of the battery or replenish it in time when the battery is low. Electricity. [0004] At present, most of the liquid-r...

Claims

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Application Information

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IPC IPC(8): H02J7/00H02J7/34B60R16/02
CPCH02J7/0048H02J7/342H02J7/00712H02J7/00036B60R16/02
Inventor 惠友林
Owner 合众新能源汽车股份有限公司
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