Power system for electric vehicle and electric vehicle

Abstract

The invention discloses a power system for an electric vehicle. The power system comprises a battery pack, a battery heater, a battery manager, a motor, a power distributor, a motor controller, and a shielded inductor. The battery manager is connected with the battery pack and the battery heater respectively to control the battery heater to heat the battery pack, the motor is used for driving the electric vehicle to run, the motor controller is connected with the motor and the power distributor and used for controlling operation of the motor, and the shielded inductor is connected with the power distributor in series. According to the power system, heating of batteries can be realized through heat generated by the battery pack, so that limitation of vehicles, especially the electric vehicle, in a low-temperature environment is greatly lowered. The invention further discloses the electric vehicle with the power system.

Description

technical field [0001] The present invention generally relates to the technical field of electric vehicles, and in particular relates to a power system for electric vehicles and the electric vehicles. Background technique [0002] It should be noted that the statements in this section only provide background information associated with the present disclosure and may or may not constitute prior art. [0003] Normally, the operating temperature of lithium-ion batteries is -20°C to 55°C, and batteries are not allowed to be charged at low temperatures. When the ambient temperature is too low, the internal battery of the electric vehicle will have the following problems: 1. Lithium ion capacity is deposited on the negative electrode, losing electrical activity, and may even cause safety problems; vehicles / battery packs are often used at low temperatures, which will greatly damage the battery Packet life, more serious may have security risks. 2. When a lithium-ion battery is bei...

AI Technical Summary

Problems solved by technology

When the ambient temperature is too low, the internal battery of the electric vehicle will have the following problems: 1. Lithium ion capacity is deposited on the negative electrode, losing electrical activity, and may even cause safety problems; vehicles / battery packs are often used at low temperatures, which will greatly damage the battery Packet life, there may be safety hazards when it is more serious

2. When a lithium-ion battery is being charged, lithium ions are easily deposited on the negative electrode, turning into dead lithium, and the capacity of the battery can be significantly reduced; in the process of continuous use, these deposited lithium grows larger and may even cause an internal short circuit, resulting in Security risks

3. The discharge capacity of the battery is limited, which is not conducive to driving

However, most of the electric vehicles at this stage obviously cannot meet this requirement, especially in the cold winter, the temperature is too low, which will reduce the performance of the power battery, both in terms of discharge capacity and battery capacity. can't even use

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