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Electric vehicle thermal management loop, control method and pure electric vehicle

A technology for electric vehicles and thermal management, applied in electric vehicles, battery/fuel cell control devices, circuits, etc., can solve the problems that the mileage of pure electric vehicles cannot be achieved, heating energy consumption affects the battery life of the whole vehicle, and pure electric vehicles are prohibitive. , to achieve the effects of improving battery life, reducing vehicle energy consumption, and reducing the load of the air conditioning system

Pending Publication Date: 2022-02-18
ZHIJI AUTOMOTIVE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Among them, pure electric vehicles are limited by the current battery material characteristics and capacity bottlenecks. The cruising range of pure electric vehicles cannot achieve the same cruising range as traditional fuel vehicles, especially in low-temperature environments in winter. Main reasons for staying away
In the low temperature environment in winter, both the passenger compartment and the power battery need to be heated. The heating source is generally realized by PTC. However, the electrothermal efficiency of PTC is only about 0.95. Therefore, in the low temperature environment, the heating energy consumption of pure electric vehicles directly affects the battery life of the whole vehicle. high and low
In the existing technology, power battery temperature control consumes a lot of energy, which affects battery life and cannot meet actual needs

Method used

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  • Electric vehicle thermal management loop, control method and pure electric vehicle
  • Electric vehicle thermal management loop, control method and pure electric vehicle
  • Electric vehicle thermal management loop, control method and pure electric vehicle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0149] see figure 1 As shown, a thermal management circuit of an electric vehicle includes a driving motor cooling piping system, a power battery temperature controlling piping system, a passenger cabin temperature controlling piping system, a first control piping system and a second control piping system.

[0150] Specifically, see figure 1 As shown, the driving motor cooling piping system includes an expansion kettle 11, a first water pump 12, a driving motor 13 and a low-temperature radiator 14 connected in sequence. It can be understood that the driving motor 13 in the present invention refers to the driving motor 13. The cooling water channel is not the power structure of the drive motor 13 itself; the power battery temperature control piping system includes the second water pump 21, the first PTC heater 22, the battery cooler 23 and the power battery 24 connected in sequence, it can be understood that The power battery 24 in the present invention refers to the cooling c...

Embodiment 2

[0202] The difference between this embodiment and Embodiment 1 lies in the specific implementation manners of the first control piping system and the first control valve assembly.

[0203] see image 3 As shown, in this embodiment, the first control piping system includes a four-way valve 34, a first three-way valve 35 and a second three-way valve 37;

[0204] The four ports of the four-way valve 34 are respectively connected with the low temperature radiator 14, the expansion kettle 11, the power battery 24 and the second water pump 21;

[0205] Two of the ports of the first three-way valve 35 are connected in series on the pipeline between the drive motor 13 and the low-temperature radiator 14, and the other port is connected to one end of a third branch pipe 36, and the third branch pipe The other end of 36 is connected with the pipeline between the low temperature radiator 14 and the four-way valve 34;

[0206] Two ports of the second three-way valve 37 are connected in ...

Embodiment 3

[0210] The difference between this embodiment and Embodiment 1 lies in the specific implementation manner of the first control valve assembly.

[0211] see Figure 4 As shown, in this embodiment, the first control valve assembly includes a third three-way valve 58, and the third three-way valve 58 is located at the connection between the front end of the first sub-pipeline 401 and the main pipework 400 at the node.

[0212] It can be understood that under the inspiration of Embodiment 1 and Embodiment 3 of the present invention, those skilled in the art can also use other forms of valve structures to realize the connection between the outdoor heat exchanger 42 and the interior condenser 45 in the present invention. Alternative control, these alternatives also belong to the protection scope of the present invention

[0213]The invention realizes the series-parallel operation of the cooling circuit of the electric vehicle drive motor 13 and the cooling circuit of the power bat...

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Abstract

The invention belongs to the technical field of new energy vehicle thermal management, and particularly relates to an electric vehicle thermal management loop, a control method and a pure electric vehicle, and the thermal management loop comprises a heat pump refrigerant loop, a driving motor cooling pipe system and a power battery temperature control pipe system. The heat pump loop has nine modes: a single passenger compartment refrigeration mode; a cell cooling mode; a priority-adjustable passenger compartment refrigeration and battery cooling mode; a passenger compartment heating non-waste heat recovery mode; a passenger compartment heating belt waste heat recovery mode; a passenger compartment refrigeration and dehumidification mode; a passenger compartment heating and dehumidifying mode; an external heat exchanger parking defrosting mode; and an external heat exchanger driving defrosting mode. Series-parallel operation of the driving motor cooling loop and the power battery cooling loop of the electric vehicle is achieved, the power battery can be independently cooled or heated, heat generated by the motor can be used for heating the power battery, and energy recycling is achieved.

Description

technical field [0001] The invention belongs to the technical field of thermal management of a new energy vehicle, and in particular relates to a thermal management circuit of an electric vehicle, a control method and a pure electric vehicle. Background technique [0002] With the development of the economy and the progress of society, energy conservation has become an inevitable and social consensus. New energy vehicles have become the main development direction of the automotive industry. The current new energy vehicles mainly include pure electric vehicles and hydrogen fuel vehicles. [0003] Among them, pure electric vehicles are limited by the current battery material characteristics and capacity bottlenecks. The cruising range of pure electric vehicles cannot achieve the same cruising range as traditional fuel vehicles, especially in low-temperature environments in winter. The main reason for staying away. In the low temperature environment in winter, both the passen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60H1/00B60H1/03B60H1/14B60L58/26B60L58/27B60K11/02H01M10/613H01M10/625H01M10/635H01M10/615H01M10/637H01M10/6571H01M10/6568H01M10/6569H01M10/6556H01M10/663
CPCB60H1/00271B60H1/00278B60H1/03B60H1/143B60L58/26B60L58/27B60K11/02H01M10/613H01M10/625H01M10/635H01M10/615H01M10/637H01M10/6571H01M10/6568H01M10/6569H01M10/6556H01M10/663B60H2001/00307Y02E60/10Y02T10/70B60H1/00885B60H1/00485B60H1/32284
Inventor 闫福珑王天英吴俊刘杰
Owner ZHIJI AUTOMOTIVE TECH CO LTD