CN212209706U

CN212209706U - Power battery temperature control system and automobile

Info

Publication number: CN212209706U
Application number: CN202021330179.4U
Authority: CN
Inventors: 王路喜; 杨勇; 张超; 鲜奇迹; 李军; 癿建建
Original assignee: Chongqing Branch of DFSK Motor Co Ltd
Current assignee: Chongqing Branch of DFSK Motor Co Ltd
Priority date: 2020-07-08
Filing date: 2020-07-08
Publication date: 2020-12-22
Anticipated expiration: 2030-07-08

Abstract

The utility model discloses a power battery temperature control system and an automobile, wherein the power battery temperature control system comprises a tail gas heat exchange device, a battery heat exchange device and a water pump; the tail gas heat exchange device, the battery heat exchange device and the water pump are connected through pipelines; the power battery temperature control system also comprises a PTC heating device; the PTC heating device is used for assisting in heating when the tail gas heat exchange device is low in heating efficiency; the water pump is used for controlling the fluid flow in the pipeline; the tail gas heat exchange device is used for exchanging heat with the tail gas of the engine; the battery heat exchange device is used for exchanging heat with the power battery. The utility model makes full use of the waste heat of the engine, and transfers the heat to the power battery through the cooling liquid, thereby reducing the energy consumption of the vehicle, saving the energy and protecting the environment; meanwhile, when the temperature of the tail gas is low and heat supply cannot be well carried out, the PTC heating device is adopted for auxiliary heating, so that the heating efficiency is improved.

Description

Power battery temperature control system and automobile

Technical Field

The utility model relates to a hybrid vehicle field, concretely relates to power battery temperature control system and car.

Background

In cold winter, the battery of the hybrid electric vehicle is influenced by low temperature, the activity of the battery is very low, the charging and discharging power is very low, the driving requirements of the vehicle cannot be met, and an external heat source is often needed to heat the battery. At present, most of the water temperature of an engine or a PTC heating device is used for heating a power battery, after the power battery is heated to a proper temperature, the chemical activity of the power battery can be activated, and then the limit of charge and discharge power is removed.

However, when the hot water of the engine is used for heating the battery, the temperature of the water of the engine is slowly increased, the combustion performance of fuel oil is influenced, and the emission standard and the oil consumption are further influenced; the PTC heating device is independently used for heating, so that the energy consumption of the whole vehicle is large, and the endurance mileage of the vehicle is influenced.

Disclosure of Invention

The utility model aims to overcome the defect of large energy consumption of the heating mode in the prior art, and provides a power battery temperature control system and an automobile, wherein cooling liquid flows through a tail gas heat exchange device to conduct waste heat of engine tail gas to a power battery loop so as to heat the power battery and reduce energy consumption; meanwhile, when the temperature of the tail gas is low and heat supply cannot be well carried out, the PTC heating device is adopted for auxiliary heating, so that the heating efficiency is improved.

In order to realize the purpose of the utility model, the utility model provides a following technical scheme:

a power battery temperature control system comprises a tail gas heat exchange device, a battery heat exchange device and a water pump; the tail gas heat exchange device, the battery heat exchange device and the water pump are connected through pipelines; the power battery temperature control system also comprises a PTC heating device; the PTC heating device is used for assisting in heating when the tail gas heat exchange device is low in heating efficiency; the water pump is used for controlling the fluid flow in the pipeline; the tail gas heat exchange device is used for exchanging heat with the tail gas of the engine; the battery heat exchange device is used for exchanging heat with the power battery.

Preferably, the PTC heating device is disposed at a pipe between the exhaust gas heat exchange device and the battery heat exchange device.

Preferably, the battery heat exchange device is a battery heat exchange plate.

Preferably, the power battery temperature control system further comprises a battery cooler connected with the tail gas heat exchange device in parallel; the first end of the battery cooler and the first end of the tail gas heat exchange device are connected with the first end of the water pump through a three-way valve.

Preferably, the battery cooler includes a battery water side and an air conditioning refrigerant side.

Preferably, the three-way valve is a three-way opening valve.

Preferably, the power battery temperature control system further comprises a battery expansion kettle.

An automobile comprises the power battery temperature control system, and the power battery temperature control system is used for adjusting the temperature of the power battery of the automobile.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the waste heat of the engine is fully utilized, the heat is conducted to the power battery through the cooling liquid, the energy consumption of the vehicle is reduced, the energy is saved, the environment is protected, and meanwhile, when the temperature of tail gas is low and heat cannot be well supplied, the PTC heating device is adopted for auxiliary heating, so that the heating efficiency is improved;

2. the battery expansion kettle is adopted to protect the water channel, so that the damage of the liquid in the water channel to the water channel pipeline caused by expansion caused by heat and contraction caused by cold is avoided, and meanwhile, the loss of the liquid after long-time use is compensated;

3. the three-way valve adopts a three-way opening valve, and the temperature can be better adjusted by adjusting the flow of the refrigerating circuit and the heating circuit.

Description of the drawings:

fig. 1 is a system block diagram i of a power battery temperature control system according to an exemplary embodiment 1 of the present invention;

fig. 2 is a system block diagram ii of a power battery temperature control system according to an exemplary embodiment 1 of the present invention;

fig. 3 is a system block diagram three of the power battery temperature control system according to exemplary embodiment 1 of the present invention;

fig. 4 is a block diagram of a power battery temperature control system according to exemplary embodiment 1 of the present invention.

Detailed Description

The present invention will be described in further detail with reference to test examples and specific embodiments. However, it should not be understood that the scope of the above-mentioned subject matter is limited to the following embodiments, and all the technologies realized based on the present invention are within the scope of the present invention.

Example 1

As shown in fig. 1, the present embodiment provides a temperature control system for a power battery, which includes a tail gas heat exchange device, a battery heat exchange device, and a water pump; the tail gas heat exchange device, the battery heat exchange device and the water pump are connected through pipelines; the power battery temperature control system also comprises a PTC heating device; the PTC heating device can be arranged at any position among the tail gas heat exchange device, the battery heat exchange device and the water pump and is used for assisting in heating when the tail gas heat exchange device is low in heating efficiency; the water pump is used for controlling the fluid flow in the pipeline; the tail gas heat exchange device is used for exchanging heat with the tail gas of the engine; the battery heat exchange device is used for exchanging heat with the power battery.

When the battery needs to be heated, for example, the temperature of the tail gas of an engine is low (for example, when an automobile is started), in order to quickly heat the battery, the PTC heating device is started for auxiliary heating, and after the temperature of the tail gas rises, the PTC heating device is stopped, and the tail gas heat exchanger is independently used for heating the battery. The waste heat of the engine is fully utilized, and the heat is conducted to the power battery through the fluid in the pipeline, namely the cooling liquid; compared with the method that hot water of an engine is used for heating the battery, the combustion performance of fuel oil cannot be influenced by heating the power battery through tail gas waste heat; meanwhile, the PTC heating device is used for auxiliary heating only when the temperature of the tail gas is low, and the PTC heating device is stopped when the waste heat of the tail gas is enough to provide heat, so that the service time of the PTC heating device is shortened, the energy consumption of a vehicle is reduced, the energy is saved, and the environment is protected; compared with the mode of only heating by using the waste heat of the tail gas, the PTC heating device assists in heating, and the heating efficiency can be improved.

As shown in fig. 2, the PTC heating device is disposed at the pipe between the exhaust gas heat exchange device and the battery heat exchange device. When the battery heat exchange plate is heated, when the temperature of the cooling liquid flowing through the tail gas heat exchange device is lower, the PTC heating device can be quickly started to heat the cooling liquid, and the heating efficiency is improved.

Wherein, the battery heat exchange device is a battery heat exchange plate. The power battery is usually provided with a battery heat exchange plate, and the existing battery heat exchange plate is adopted for heat exchange of the power battery in the embodiment, so that the structure is simple.

The power battery temperature control system also comprises a battery cooler connected with the tail gas heat exchange device in parallel; the first end of the battery cooler and the first end of the tail gas heat exchange device are connected with the first end of the water pump through a three-way valve; the second end of the battery cooler and the second end of the tail gas heat exchange device are respectively connected with the first end and the second end of the first three-way joint, and the third end of the first three-way joint is connected with one end, far away from the water pump, of the battery heat exchange plate. The battery cooler includes a battery water side and an air conditioning refrigerant side. When the temperature of the power battery is low, the power battery needs to be heated by a tail gas heat exchange device and the like, so that the activity of the battery is improved; when the temperature of the power battery is too high, the temperature of the power battery also needs to be reduced through a battery cooler; in the embodiment, the three-way valve controls the circulation of the heating loop and the refrigerating loop, when the power battery needs to be cooled, the three-way valve closes the heating loop, opens the refrigerating loop, and the cooling liquid flows through the water pump, the battery cooler and the battery heat exchange plate to dissipate heat of the power battery, so that the safety is improved; and the battery cooler passes through the air conditioner refrigerant side, realizes the heat dissipation based on the compressor of car own, simple structure, is convenient for realize.

The three-way valve is a three-way opening valve; the three-way valve is a three-way opening valve, so that the flow of the refrigerating circuit and the flow of the heating circuit can be adjusted, when the temperature of the tail gas heat exchange device is higher, in order to avoid the damage of high-temperature tail gas to the power battery, the three-way opening valve is adjusted at the moment, the refrigerating circuit and the heating circuit are opened, the temperature of the cooling liquid from the refrigerating circuit and the temperature of the cooling liquid from the tail gas heat exchange device are neutralized, and the temperature of the water is adjusted, so that the power battery is protected.

The power battery temperature control system also comprises a battery expansion kettle; as shown in fig. 3, the upper part of the battery expansion kettle and the third end of the first three-way joint are respectively connected with the first end and the second end of the second three-way joint, and the third end of the second three-way joint is connected with one end of the battery heat exchange plate far away from the water pump; the lower part of the battery expansion kettle and the second end of the water pump are respectively connected with the first end and the second end of a third three-way joint, and the third end of the third three-way joint is connected with one end, close to the water pump, of the PTC heating device. Adopt battery inflation kettle protection water route, avoid the liquid expend with heat and contract with cold in the water route to cause the harm to the water route pipeline, compensate the loss of liquid after long-time the use simultaneously. The component connections shown in fig. 3 are exemplary embodiments for reference only.

Example 2

This embodiment provides an automobile, automobile embodiment 1 power battery temperature control system, power battery temperature control system is used for adjusting automobile power battery temperature.

The above description is only for the purpose of illustrating the embodiments of the present invention, and not for the purpose of limiting the same. Various substitutions, modifications and improvements may be made by those skilled in the relevant art without departing from the spirit and scope of the invention.

Claims

1. A power battery temperature control system is characterized by comprising a tail gas heat exchange device, a battery heat exchange device and a water pump; the tail gas heat exchange device, the battery heat exchange device and the water pump are connected through pipelines; the power battery temperature control system also comprises a PTC heating device; the PTC heating device is used for assisting in heating when the tail gas heat exchange device is low in heating efficiency; the water pump is used for controlling the fluid flow in the pipeline; the tail gas heat exchange device is used for exchanging heat with the tail gas of the engine; the battery heat exchange device is used for exchanging heat with the power battery.

2. The power battery temperature control system of claim 1, wherein the PTC heating device is disposed at a conduit between the exhaust gas heat exchange device and the battery heat exchange device.

3. The power battery temperature control system of claim 1, wherein the battery heat exchanging device is a battery heat exchanging plate.

4. The power battery temperature control system of claim 1, further comprising a battery cooler connected in parallel with the exhaust gas heat exchange device; the first end of the battery cooler and the first end of the tail gas heat exchange device are connected with the first end of the water pump through a three-way valve.

5. The power battery temperature control system of claim 4, wherein the battery cooler comprises a battery water side and an air conditioning coolant side.

6. The power cell temperature control system of claim 4, wherein the three-way valve is a three-way open valve.

7. The power cell temperature control system of claim 1, further comprising a battery expansion kettle.

8. An automobile, characterized in that the automobile comprises a power battery temperature control system according to any one of claims 1-7, wherein the power battery temperature control system is used for regulating the temperature of the power battery of the automobile.