Electric vehicle thermal management system and electric vehicle

A thermal management system and technology for electric vehicles, applied in the thermal management system of electric vehicles and the field of electric vehicles, can solve the problems of consuming electric energy of the whole vehicle, reducing the driving range, and reducing the battery life, so as to ensure the discharge power and life, and prolong the battery life. Mileage, the effect of reducing the opening time

Inactive Publication Date: 2020-04-03
CHINA FIRST AUTOMOBILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing electric vehicle cooling system generally only considers battery charging heating and high-temperature heat dissipation, and hardly considers battery heating during low-temperature driving, and in low-temperature environments, battery discharge power will be greatly reduced, seriously affecting the driving range of the vehicle; And running in a low temperature environment for a long time will seriously reduce the battery life
[0004] In addition, the existing electric vehicle cooling system generally uses the air conditioner to dissipate heat for the battery, but the power of the air conditioner is relatively large, and the cruising range is greatly affected after the air conditioner is turned on, and when the ambient temperature is low, the air conditioner cannot start and work. There is also a technical solution for the battery cooling system Configure a radiator, but the structure is complex and the cost is high
[0005] Furthermore, electric heaters are generally used for heating the passenger compartment of existing electric vehicles, and a few vehicles use heat pumps for heating, but they all need to consume electric energy of the entire vehicle, and the energy consumption is large. Turning on the passenger compartment heating for a long time will greatly reduce the driving time mileage
The electric vehicle cooling system generally uses two heaters, one electric heater for the battery circuit, which is used to heat the battery when the battery is charged at low temperature quickly, and one electric heater for the warm air circuit, which is used to ensure the heating of the passenger compartment, and two heaters are set very high cost

Method used

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  • Electric vehicle thermal management system and electric vehicle
  • Electric vehicle thermal management system and electric vehicle
  • Electric vehicle thermal management system and electric vehicle

Examples

Experimental program
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Effect test

Embodiment 1

[0050] figure 1 It shows the electric vehicle thermal management system provided by this embodiment, including a battery control circuit 100 , a power train control circuit 200 and a heater control circuit 300 .

[0051]Specifically, the battery control circuit 100 is coupled to the battery pack 13 of the electric vehicle. The battery control circuit 100 is provided with a first circulating pump 11 and a cooling device 12 (Chiller). The first circulation pump 11 drives the circulation of the heat transfer fluid in the battery control circuit 100, and the heat transfer fluid exchanges heat with the battery pack 13, and controls the temperature of the battery pack 13 to be in the optimum working temperature range, ensuring the charging and discharging efficiency of the battery and the battery life of the electric vehicle ability. When the ambient temperature is high and the heat dissipation requirement of the battery is high, the cooling device 12 is activated.

[0052] The w...

Embodiment 2

[0078] The difference between this embodiment and embodiment one is:

[0079] Such as Figure 8 As shown, for the first valve assembly 10, the scheme of using two first three-way valves instead of one first four-way valve can still realize the parallel connection of the powertrain control circuit 200 and the battery control circuit 100; for the third The valve assembly 30 adopts the form of two second three-way valves instead of a second four-way valve, which can still realize the parallel connection of the power train control circuit 200 and the heating air control circuit 300; for the second valve assembly 20, a first The form of a two-way valve replaces the above-mentioned second valve assembly 20 , which can still realize the connection or disconnection between the radiator 24 and the main circuit 21 . Obviously, for the fourth valve assembly 40, three second two-way valves can also be used instead of the fourth three-way valve, and the heat exchanger 34 in the warm air c...

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Abstract

The invention belongs to the technical field of electric vehicles, and particularly discloses an electric vehicle thermal management system and an electric vehicle, and the electric vehicle thermal management system comprises a battery control loop and a power system control loop. The battery control loop is coupled to a battery pack of the electric vehicle; the power system control loop comprisesa main path, a first branch path and a second branch path, heat transfer fluid in the power system control loop can flow into the first branch path and the second branch path from the main path and finally flows back to the main path, a radiator is arranged on the main path, the first branch path is coupled to at least one power system component of the electric automobile, and a switch valve is arranged on the second branch path. A first valve assembly which can couple the second branch path with the battery control loop, and the second valve assembly which can disconnect or connect the radiator with the main path are also included. The battery pack is heated by utilizing the waste heat of the power system component to ensure the low-temperature discharge power of the battery; the power system and the battery pack share the radiator for heat dissipation, the starting time of a cooling device of the battery pack is shortened, and energy consumption is reduced.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to an electric vehicle thermal management system and the electric vehicle. Background technique [0002] As an important form of new energy vehicles, electric vehicles have significant advantages such as zero emission, low cost, low noise, and good driving performance, and have extremely broad application prospects. [0003] The existing electric vehicle cooling system generally only considers battery charging heating and high-temperature heat dissipation, and hardly considers battery heating during low-temperature driving, and in low-temperature environments, battery discharge power will be greatly reduced, seriously affecting the driving range of the vehicle; And running in a low temperature environment for a long time will seriously reduce the battery life. [0004] In addition, the existing electric vehicle cooling system generally uses the air conditioner to dissipat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L58/26B60L58/27B60H1/00B60H1/14
CPCB60H1/00278B60H1/00392B60H1/143B60L58/26B60L58/27Y02T10/70
Inventor 张艳芳张爱文常乃文
Owner CHINA FIRST AUTOMOBILE
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