Cooling Structure of HEV Vehicle Power Battery and HEV Vehicle

Abstract

The present invention discloses a cooling structure for a power battery of an HEV vehicle and an HEV vehicle, including a rear seat side trim, an air inlet, a filter element, a power battery intake air duct, a power battery, a power battery exhaust air duct, a blower, a blower exhaust air duct, and a luggage compartment side trim; the air inlet is arranged on the rear seat side trim; the air inlet is communicated with the internal core of the power battery through the filter element and the power battery intake air duct, and the power battery is connected to the blower through the power battery exhaust air duct; the blower is communicated with the internal cavity of the luggage compartment side trim through the blower exhaust air duct; and an air vent and a ventilation pressure relief valve communicated with the internal cavity are arranged on the luggage compartment side trim. The present invention has the advantages of simple structure, good cooling effect, and low cost.

Description

Technical Field

[0001] The present invention belongs to the technical field of cooling structures for hybrid electric vehicles (HEVs), and particularly relates to a cooling structure for a power battery of an HEV and an HEV vehicle. Background Art

[0002] With the increasingly strict requirements for energy conservation and emission reduction in automobiles, traditional fuel vehicles are beginning to transform towards electrification. Hybrid electric vehicles can solve problems such as range anxiety and charging difficulties for consumers regarding pure electric vehicles. As a type of hybrid electric vehicle (HEV) with a small battery capacity, low cost, no need for charging, low fuel consumption, good emission reduction effect, and a driving experience similar to that of traditional fuel vehicles, HEVs have been recognized by consumers. Due to the characteristics of small battery capacity and low vehicle manufacturing cost in HEVs, the power battery requires a cooling structure with simple structure, good reliability, low manufacturing cost, and good cooling effect.

[0003] For example, the cooling system and its control method for a hybrid electric vehicle disclosed in patent document CN105484846A. Among them, the cooling system of the hybrid electric vehicle (HEV) includes an engine cooling circuit that uses an engine heat exchanger to cool cooling water and an engine water pump to circulate the cooled cooling water to cool the engine. The HEV cooling circuit uses an HEV heat exchanger to cool cooling water and an HEV water pump to circulate the cooled cooling water to cool the inverter and the motor. A connection part connects the engine cooling circuit to the HEV cooling circuit. The engine cooling circuit and the HEV cooling circuit of this system operate independently, and in the emergency situation of overheating of the HEV system, the cooling water of the engine cooling circuit is provided to the HEV cooling circuit. It does not meet the requirements of simple structure and low manufacturing cost.

[0004] Therefore, it is necessary to develop a new cooling structure for a power battery of an HEV and an HEV vehicle. Summary of the Invention

[0005] The purpose of the present invention is to provide a cooling structure for a power battery of an HEV and an HEV vehicle with simple structure, good cooling effect, and low cost.

[0006] In a first aspect, a cooling structure for a power battery of an HEV according to the present invention includes a rear seat side trim, an air inlet, a filter element, a power battery inlet air duct, a power battery, a power battery outlet air duct, a fan, a fan outlet air duct, and a luggage compartment side trim;

[0007] The air inlet is provided on the rear seat side trim;

[0008] The air inlet is communicated with the internal core of the power battery through the filter element and the power battery inlet air duct,

[0009] The power battery is connected to the blower through the power battery air outlet duct;

[0010] The blower is communicated with the inner cavity of the luggage compartment side trim panel through the blower air outlet duct;

[0011] An air vent and a ventilation pressure relief valve communicated with the inner cavity are arranged on the luggage compartment side trim panel;

[0012] When the blower works, the air in the passenger compartment enters from the air inlet, passes through the air filter and the power battery air inlet duct and enters the inner core of the power battery, taking away the heat, and then enters the blower through the power battery air outlet duct. The rotation of the blower drives the air to circulate. The air flow enters the luggage compartment side trim panel through the blower air outlet duct, passes through the inner cavity of the luggage compartment side trim panel to the air vent and the ventilation pressure relief valve. At this time, if the mode of the air outlet on the instrument panel is external circulation, the ventilation pressure relief valve is in an open state, and the air is discharged out of the vehicle through the ventilation pressure relief valve. The heat generated by the power battery is discharged out of the vehicle along with the air; if the mode of the air outlet on the instrument panel is internal circulation, at this time the ventilation pressure relief valve is in a closed state, and the air is discharged through the air vent on the luggage compartment side trim panel. The air forms a circulation in the passenger compartment, and the air conditioner system monitors the internal temperature of the passenger compartment. When the internal temperature of the passenger compartment reaches the preset temperature threshold, the air conditioner system is automatically started for cooling, and the heat generated by the power battery is discharged through the air conditioner system.

[0013] Optionally, the air filter is fixed on the air inlet, and the air inlet is installed on the rear seat side trim.

[0014] Optionally, a limiting boss is arranged on the air filter, and the air filter is fixed on the air inlet through the limiting boss; the assembly structure is simple, the reliability is good, and it is convenient for disassembly and maintenance.

[0015] Optionally, a clip is arranged on the air inlet; a clamping hole is arranged on the rear seat side trim; the air inlet is assembled on the clamping hole of the rear seat side trim through the clip; the assembly structure is simple, the reliability is good, and it is convenient for disassembly and maintenance.

[0016] Optionally, the ventilation pressure relief valve is fixed on the vehicle body.

[0017] In a second aspect, a HEV vehicle according to the present invention adopts the cooling structure of the HEV vehicle power battery as described in the present invention.

[0018] The present invention has the following advantages: The power battery is cooled by forced blowing of the blower, and it does not need the cooling water of the engine cooling circuit for cooling. The structure of the cooling system is simple, the cooling effect is good, and the system cost is low. Description of the Drawings

[0019] Figure 1 is a schematic structural diagram of this embodiment;

[0020] Figure 2 It is a schematic installation diagram of the air inlet, filter element and rear seat side trim piece in this embodiment;

[0021] Figure 3 It is a schematic installation diagram of the ventilation and pressure relief valve in this embodiment;

[0022] In the figure: 1. Rear seat side trim piece, 1a. Clamping hole, 2. Air inlet, 2a. Clip, 3. Filter element, 3a. Limiting boss, 4. Power battery intake pipe, 5. Power battery, 6. Power battery outlet pipe, 7. Fan, 8. Fan outlet pipe, 9. Trunk side trim panel, 10. Vent hole, 11. Ventilation and pressure relief valve, 12. Vehicle body. Specific implementation manners

[0023] The present invention will be described in detail below with reference to the accompanying drawings.

[0024] As Figures 1 to 3 shown, in this embodiment, a cooling structure for a HEV vehicle power battery includes a rear seat side trim piece 1, an air inlet 2, a filter element 3, a power battery intake pipe 4, a power battery 5, a power battery outlet pipe 6, a fan 7, a fan outlet pipe 8 and a trunk side trim panel 9. The air inlet 2 is arranged on the rear seat side trim piece 1. The air inlet 2 is communicated with the internal core of the power battery 5 through the filter element 3 and the power battery intake pipe 4. The power battery 5 is connected to the fan 7 through the power battery outlet pipe 6. The fan 7 is communicated with the internal cavity of the trunk side trim panel 9 through the fan outlet pipe 8. The trunk side trim panel 9 is provided with a vent hole 10 and a ventilation and pressure relief valve 11 that are communicated with its internal cavity.

[0025] The working principle is as follows: During the operation of the vehicle, according to the thermal management status of the power battery 5, the cell temperature, and the interior temperature of the vehicle, by controlling the duty cycle of the blower 7, the cooling function and heating function of the power battery 5 are realized, ensuring that the cell temperature of the power battery 5 is controlled within an appropriate range when it works. When the blower 7 works, the air in the passenger compartment enters from the air inlet 2, passes through the filter element 3 and the power battery inlet air duct 4 into the internal core of the power battery 5, takes away the heat, and then enters the blower 7 through the power battery outlet air duct 6. The rotation of the blower 7 drives the air to circulate. The air flow enters the inner side trim panel 9 of the trunk through the blower outlet air duct 8, passes through the internal cavity of the inner side trim panel 9 of the trunk to the air vent 10 and the ventilation and pressure relief valve 11. At this time, if the mode of the air outlet on the instrument panel is the external circulation, since the air pressure inside the vehicle is higher than the air pressure outside the vehicle, the ventilation and pressure relief valve 11 will open, and the air is discharged outside the vehicle through the ventilation and pressure relief valve 11. The heat generated by the power battery 5 is discharged outside the vehicle along with the air. If the mode of the air outlet on the instrument panel is the internal circulation, at this time the ventilation and pressure relief valve 11 is in the closed state, and the air is discharged through the air vent 10 on the inner side trim panel 9 of the trunk. The air forms a circulation in the passenger compartment, and the air conditioner system monitors the internal temperature of the passenger compartment. When the internal temperature of the passenger compartment reaches the preset temperature threshold, the air conditioner system is automatically started to cool down, and the heat generated by the power battery 5 is discharged through the air conditioner system.

[0026] As Figure 2 shown, in this embodiment, the filter element 3 is fixed on the air inlet 2, and the air inlet 2 is installed on the side trim of the rear seat 1. Specifically: The filter element 3 is provided with a limit boss 3a, and the filter element 3 is fixed on the air inlet 2 through the limit boss 3a. The air inlet 2 is provided with a clip 2a; the side trim of the rear seat 1 is provided with a clamping hole 1a; the air inlet 2 is assembled on the clamping hole 1a of the side trim of the rear seat 1 through the clip 2a. This assembly structure is simple, has good reliability, and is convenient for disassembly and maintenance.

[0027] As Figure 3 shown, in this embodiment, the ventilation and pressure relief valve 11 is fixed on the vehicle body 12 through its own clip.

[0028] In this embodiment, a HEV vehicle adopts the cooling structure of the HEV vehicle power battery as described in this embodiment.

[0029] The above embodiments are the preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present invention shall be equivalent replacement methods and are all included in the protection scope of the present invention.

Claims

1. A cooling structure for a power battery of an HEV vehicle, characterized in that: It includes a rear seat side trim (1), an air inlet (2), a filter element (3), a power battery intake air duct (4), a power battery (5), a power battery exhaust air duct (6), a blower (7), a blower exhaust air duct (8) and a luggage compartment side trim (9); The air inlet (2) is arranged on the rear seat side trim (1); The air inlet (2) is communicated with the internal core of the power battery (5) through the filter element (3) and the power battery intake air duct (4), The power battery (5) is connected to the blower (7) through the power battery exhaust air duct (6); The blower (7) is communicated with the internal cavity of the luggage compartment side trim (9) through the blower exhaust air duct (8); The luggage compartment side trim (9) is provided with a ventilation port (10) and a ventilation pressure relief valve (11) communicated with its internal cavity; When the blower (7) works, the air in the passenger compartment enters from the air inlet (2), passes through the filter element (3) and the power battery intake air duct (4) and enters the internal core of the power battery (5), taking away heat, and then enters the blower (7) through the power battery exhaust air duct (6). The rotation of the blower (7) drives the air to circulate. The air flow enters the luggage compartment side trim (9) through the blower exhaust air duct (8), passes through the internal cavity of the luggage compartment side trim (9) to the ventilation port (10) and the ventilation pressure relief valve (11). At this time, if the mode of the air outlet on the instrument panel is external circulation, the ventilation pressure relief valve (11) is in an open state, and the air is discharged out of the vehicle through the ventilation pressure relief valve (11), and the heat generated by the power battery (5) is discharged out of the vehicle along with the air; if the mode of the air outlet on the instrument panel is internal circulation, at this time the ventilation pressure relief valve (11) is in a closed state, and the air is discharged through the ventilation port (10) on the luggage compartment side trim (9), and the air forms a circulation in the passenger compartment, and the internal temperature of the passenger compartment is monitored by the air conditioning system. When the internal temperature of the passenger compartment reaches the preset temperature threshold, the air conditioning system is automatically started for cooling, and the heat generated by the power battery (5) is discharged through the air conditioning system.

2. The cooling structure for a power battery of an HEV vehicle according to claim 1, characterized in that: The filter element (3) is fixed on the air inlet (2), and the air inlet (2) is installed on the rear seat side trim (1).

3. The cooling structure for a power battery of an HEV vehicle according to claim 2, characterized in that: The filter element (3) is provided with a limit boss (3a), and the filter element (3) is fixed on the air inlet (2) through the limit boss (3a).

4. The cooling structure for a power battery of an HEV vehicle according to claim 2 or 3, characterized in that: The air inlet (2) is provided with a clip (2a); the rear seat side trim (1) is provided with a clamping hole (1a); the air inlet (2) is assembled on the clamping hole (1a) of the rear seat side trim (1) through the clip (2a).

5. The cooling structure for a power battery of an HEV vehicle according to claim 4, characterized in that: The ventilation pressure relief valve (11) is fixed on the vehicle body (12).

6. An HEV vehicle, characterized in that: Adopt the cooling structure of the HEV automotive power battery as described in any one of claims 1 to 5.

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