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A power battery and its control method, and an electric vehicle

A power battery and battery module technology, applied in electric vehicles, battery/fuel cell control devices, control devices, etc., can solve problems such as incompatibility with high and low power supply voltages, and achieve the effect of avoiding battery fires

Active Publication Date: 2022-08-05
FAFA AUTOMOBILE (CHINA) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the charging voltage (generally about 400V) and the charging method of the power battery of most existing charging vehicles are fixed, which cannot be compatible with high and low supply voltages. It is necessary to configure an additional transformer system for electric vehicles to adjust the voltage drop to match supply voltage

Method used

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  • A power battery and its control method, and an electric vehicle
  • A power battery and its control method, and an electric vehicle
  • A power battery and its control method, and an electric vehicle

Examples

Experimental program
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Effect test

example 1

[0224] Figure 18a A working mode reference of Figure 20a , the first battery module 181 and the second battery module 182 work in parallel. At this time, it is detected that the electrical signal value of the electrical signal sensor 187 connected to the first auxiliary relay 184 is abnormal and that the electrical signal sensor connected to the second auxiliary relay 185 is abnormal. If the value of the electrical signal of 187 is abnormal, it is determined that the intermediate relay 183 connected to the first battery module 181 and the second battery module 182 is stuck (original when working in parallel, the intermediate relay 183 should be disconnected, but it may be There is a problem of component adhesion, which cannot be disconnected or cannot be completely disconnected), the controller of the power battery first checks other components in the parallel circuit (the first auxiliary relay 184, the second auxiliary relay 185, the first battery module Whether the first ...

example 2

[0228] Figure 18b A working mode reference of Figure 20b , the first battery module 181 and the second battery module 182 work in parallel. At this time, it is detected that the electrical signal value of the electrical signal sensor 187 connected to the first auxiliary relay 184 is abnormal and that the electrical signal sensor connected to the second auxiliary relay 185 is abnormal. If the value of the electrical signal of 187 is abnormal, it is determined that the intermediate relay 183 connected to the first battery module 181 and the second battery module 182 is stuck (original when working in parallel, the intermediate relay 183 should be disconnected, but it may be There is a problem of component adhesion, which cannot be disconnected or cannot be completely disconnected), the controller of the power battery first checks other components in the parallel circuit (the first auxiliary relay 184, the second auxiliary relay 185, the first battery module Whether the first ...

example 3

[0232] Figure 18c A working mode reference of Figure 20c , the first battery module 181 and the second battery module 182 work in parallel. At this time, it is detected that the electrical signal value of the electrical signal sensor 187 connected to the first auxiliary relay 184 is abnormal and that the electrical signal sensor connected to the second auxiliary relay 185 is abnormal. If the value of the electrical signal of 187 is abnormal, it is determined that the intermediate relay 183 connected to the first battery module 181 and the second battery module 182 is stuck (original when working in parallel, the intermediate relay 183 should be disconnected, but it may be There is a problem of component adhesion, which cannot be disconnected or cannot be completely disconnected), the controller of the power battery first checks other components in the parallel circuit (the first auxiliary relay 184, the second auxiliary relay 185, the first battery module Whether the first ...

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Abstract

The present application discloses a power battery, a control method thereof, and an electric vehicle, which are used to solve the charging problem existing in the prior art. The solution mainly includes: a first end for connecting the positive electrode of the power supply device and a second end for connecting the negative electrode of the power supply device; at least two battery modules arranged between the first end and the second end; at least two battery modules A first relay is connected between adjacent battery modules in the group, and each battery module is respectively connected to the first end and the second end through at least one second relay; each battery module is connected in series with at least one second relay. An electrical signal sensor is connected in series in the circuit; an explosion disconnecting device is connected to either end of the first relay and / or the second relay, so that when the circuit element of the power battery has an adhesion failure and the circuit is short-circuited, the corresponding The explosive disconnect device disconnects the circuit with a short circuit, so as to avoid the danger of battery fire caused by the short circuit of the power battery, so as to protect the power battery.

Description

technical field [0001] The present application relates to the technical field of power batteries, and in particular, to a power battery and a control method thereof, and an electric vehicle. Background technique [0002] With the popularization of new energy electric vehicles, the development of DC fast charging technology has become more and more important. Especially in order to adapt to the increasingly long driving range, the capacity demand of the power battery of electric vehicles is also increasing. [0003] At present, a high power supply voltage of about 800V is proposed to meet the charging needs of large-capacity power batteries. However, the charging voltage (usually about 400V) and charging method of the power batteries of most existing charging vehicles are fixed, which cannot be compatible with high power supply voltage and low power supply voltage. It is necessary to configure an additional transformer system for electric vehicles to adjust the voltage drop ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L58/10B60L58/22B60L3/00B60L3/04
CPCB60L3/0046B60L3/04B60L2240/547Y02T10/70
Inventor 朱道平傅振兴
Owner FAFA AUTOMOBILE (CHINA) CO LTD