Electric vehicle with accident ventilation device and accident ventilation device for electric vehicle

Abstract

The utility model relates to an electric vehicle with an accident ventilation device, which is provided with a storage battery for high-voltage traction, a traction motor powered by the storage battery for high-voltage traction, and a passenger compartment, and comprises a fresh air storage tank for storing fresh air under the pressure exceeding the atmospheric pressure, the connecting pipeline is internally provided with a ventilation valve and is connected with the passenger compartment in a fluid communication manner; the utility model relates to a high-voltage traction battery, comprising a high-voltage traction battery, at least one accident sensor for detecting exhaust critical measurement parameters of the high-voltage traction battery, and an electronic accident control system with an accident detector, which reports an accident when receiving an exhaust critical measurement parameter signal from the accident sensor, if the accident detector reports an accident, the accident control system opens the vent valve.

Description

Technical Field

[0001] This utility model relates to an electric vehicle with an emergency ventilation device and an emergency ventilation device for an electric vehicle. Background Technology

[0002] The electric vehicle has a high-voltage traction battery with a rated voltage exceeding 100V, a traction motor powered by the high-voltage traction battery, and a passenger compartment. In the event of an accident, the high-voltage traction battery is a hazard because it may explosively release high-temperature and toxic gases that must not enter the vehicle's passenger compartment.

[0003] A motor vehicle with a ventilation system is known from DE 103 55 893B3 and DE 196 04 661A1, wherein the ventilation system has a hazardous substance sensor in the air intake duct. Once the hazardous substance sensor in the air intake duct detects that the intake air is contaminated with a hazardous substance, fresh air is supplied to the passenger compartment through a fresh air reservoir. However, the mode of supplying fresh air through the fresh air reservoir is only switched if a hazardous substance has already been inhaled into the air intake duct.

[0004] An electric vehicle with a traction battery is known from DE 10 2013 224 745 A1. The traction battery is equipped with a battery gas sensor and a battery voltage sensor. In the event of a malfunction, a battery gas venting device is activated. Utility Model Content

[0005] Therefore, the purpose of this invention is to provide an electric vehicle with an improved emergency ventilation device to actively prevent battery gas from entering the passenger compartment, or to provide such an emergency ventilation device.

[0006] According to this utility model, the purpose of this utility model is achieved by an electric vehicle with an emergency ventilation device having the features described below, or by an emergency ventilation device having the features described below.

[0007] The electric vehicle has a high-voltage traction battery with a rated voltage exceeding 100V, a traction motor powered by the high-voltage traction battery and driving at least one wheel, a flow-controlled lockable passenger compartment, and an emergency ventilation device.

[0008] The emergency ventilation system includes a fresh air reservoir containing fresh air at a pressure above atmospheric pressure. The fresh air reservoir is connected to the passenger compartment via a connecting pipe, in which an exhaust valve is arranged in fluid series. When the exhaust valve is open, the overpressurized fresh air stored in the fresh air reservoir flows into the passenger compartment, creating a relatively low overpressure relative to the ambient atmosphere in the passenger compartment while maintaining a substantially closed flow control system.

[0009] The emergency ventilation device has at least one emergency sensor that is physically associated with the high-voltage traction battery and detects the exhaust critical measurement parameters of the high-voltage traction battery.

[0010] The accident sensor can be a battery temperature sensor for collecting the temperature of the traction battery or the ambient temperature directly above the traction battery; a battery gas flow sensor for measuring gas flow in an exhaust path associated with the flow control of the traction battery; a battery pressure sensor for measuring the internal pressure of the traction battery; a battery gas sensor located near the traction battery and capable of detecting the presence of battery gas; and / or an electrical sensor for collecting the voltage at the terminals of the traction battery. However, the accident sensor in this invention is not a battery gas sensor installed in the normal operating ventilation path for providing outside air ventilation to the passenger compartment.

[0011] The emergency ventilation system has an electronic emergency control system with an emergency detector. When the emergency detector receives a signal from the emergency sensor regarding critical exhaust measurement parameters, it reports an emergency. Critical exhaust measurement parameters include battery temperature, battery gas flow rate in the battery exhaust path, battery internal pressure, battery gas concentration, and / or an electrical parameter of the traction battery, such as its terminal voltage. Once the emergency detector detects that a critical exhaust measurement parameter exceeds a limit, it reports an emergency, causing the emergency control system to open the ventilation valve. This opens the connection between the fresh air tank and the passenger compartment, allowing fresh, clean air to flow from the fresh air tank into the passenger compartment. This applies an overpressure to the passenger compartment, preventing any further air or gas from entering from the outside.

[0012] The passenger compartment's fluid isolation is proactive, meaning it's triggered as soon as a functional fault is detected in the high-voltage traction battery, rather than waiting until battery gas is detected in the external air ventilation system. This reliably protects passengers in the passenger compartment from battery gas intrusion in the event of a traction battery failure.

[0013] Preferably, the vehicle has at least one tilt-and-turn window or sliding window allocated to the passenger compartment, which has a window pane that can be moved between an open and closed position by a window motor. Here, the tilt-and-turn window or sliding window can be, in particular, a vehicle side window and a so-called active roof or sliding sunroof, that is, any opening in the form of a door or window of the vehicle, which can be fluidly closed by a window pane that is not necessarily transparent.

[0014] Preferably, the accident control system has a window control system electrically connected to the window motor. When the accident detector reports an accident, the window control system forcibly moves the window glass to the closed position. This ensures that all movable windows of the vehicle or passenger compartment are moved to the closed position, resulting in a slightly lower overpressure in the passenger compartment relative to the ambient atmosphere when the ventilation valve is opened.

[0015] Preferably, an electric booster pump and an air filter are fluidly connected to the fresh air reservoir. The booster pump is used to pressurize the fresh air reservoir. The air filter is fluidly arranged in series and ensures the cleanliness of the intake air. Specifically, the air filter filters all particulate components from the intake air. If an incident detector reports an incident, the incident control system activates the booster pump to continue supplying filtered fresh air to the fresh air reservoir. In this way, a small amount of fresh air can continuously flow into the passenger compartment, thus maintaining a certain level of overpressure within the passenger compartment over an extended period of time.

[0016] Preferably, the motor vehicle has multiple pneumatic wheel suspension spring elements assigned to the wheels, which are fluidly connected to a fresh air reservoir. That is, the fresh air reservoir has a dual function: a compressed air reservoir for the pneumatic spring elements and a fresh air reservoir for ventilating the passenger compartment in the event of an accident.

[0017] According to one aspect of this utility model, the emergency ventilation device for electric vehicles is equipped with a high-voltage traction battery, a traction motor powered by the high-voltage traction battery, and a passenger compartment. The emergency ventilation device has the features of the aforementioned emergency ventilation device for electric vehicles.

[0018] In general, this utility model discloses the technical solutions of the following schemes 1 and 6, and the following schemes 2-5 are preferred technical solutions:

[0019] Option 1. An electric vehicle with an emergency ventilation system, comprising a high-voltage traction battery, a traction motor powered by the high-voltage traction battery, and a passenger compartment, the electric vehicle including:

[0020] A fresh air storage tank stores fresh air at pressures exceeding atmospheric pressure and is fluidly connected to the passenger compartment via a connecting pipe with an internal ventilation valve.

[0021] At least one fault sensor, said at least one fault sensor detects the critical measurement parameter of the exhaust of the high-voltage traction battery, and

[0022] An electronic accident control system with an accident detector reports an accident upon receiving a signal of the exhaust critical measurement parameter from the accident sensor.

[0023] If the accident detection system reports an accident, the accident control system will open the ventilation valve.

[0024] Option 2. The electric vehicle according to Option 1, wherein the accident sensor is a battery temperature sensor, a battery gas flow sensor, a battery pressure sensor, a battery gas sensor and / or an electrical sensor.

[0025] Option 3. The electric vehicle according to Option 1 or 2, having at least one tilt-and-turn window or sliding window assigned to the passenger compartment and a window glass movable between an open position and a closed position by a window motor, wherein the accident control system has a window control system electrically connected to the window motor, and if the accident detector reports an accident, the window control system moves the window glass to its closed position.

[0026] Option 4. The electric vehicle according to any one of Options 1-3, wherein an electric booster pump and an air filter are fluidly connected to the fresh air tank for pressurizing the fresh air tank, wherein the accident control system activates the booster pump if the accident detector reports an accident.

[0027] Option 5. The electric vehicle according to any one of Options 1-4, wherein it has a plurality of pneumatic spring elements assigned to the wheels and connected in fluid communication with the fresh air reservoir.

[0028] Option 6. An emergency ventilation device for an electric vehicle, the electric vehicle having a high-voltage traction battery, a traction motor powered by the high-voltage traction battery, and a passenger compartment, having the features of the emergency ventilation device involved in any of the preceding options.

[0029] The embodiments of this utility model will now be explained in more detail with reference to the accompanying drawings. Attached Figure Description

[0030] Figure 1 An electric vehicle with an emergency ventilation system is shown schematically. Detailed Implementation

[0031] Figure 1 The diagram schematically illustrates an electric vehicle 10 equipped with a high-voltage traction battery 30, a traction motor 34 powered by the high-voltage traction battery 30, a passenger compartment 20, and an emergency ventilation system 11. The high-voltage traction battery 30 has a nominal terminal voltage of 400V or 800V and a capacity exceeding 10kWh. The traction motor 34 drives at least two wheels 70. The vehicle 10 has a total of four wheels 70, each equipped with a pneumatic spring element 72.

[0032] The passenger compartment 20 is equipped with multiple passenger seats 22. The passenger compartment 20 has multiple electrically operated sliding windows 21, each with a window pane 26 that can move between an open and closed position within a window opening 24. The window pane 26 is moved between an open and a closed position by a window motor 28. Additionally, a passenger compartment pressure sensor 42 is provided to the passenger compartment 20 to quantitatively determine the passenger compartment gas pressure PI.

[0033] The emergency ventilation system 11 has a fresh air tank 50 in which fresh air 51 is stored at a pressure of several bar, above atmospheric pressure. The fresh air tank 50 is fluidly connected to four pneumatic spring elements 72 via a spring-controlled valve 74. An electric standard operating booster pump 52 is fluidly connected to the fresh air tank 50 and is activated when needed to pressurize the fresh air tank 50, ensuring that the gas pressure in the fresh air tank 50 is always above a predetermined minimum pressure. Additionally, an emergency electric booster pump 54 with an air filter 56 arranged in series in fluid communication is also provided to the fresh air tank 50. Because the air filter 56 creates flow resistance, the emergency booster pump 54 is activated only in the event of an emergency, as an alternative to the standard operating booster pump 52. The fresh air tank 50 is directly fluidly connected to the passenger compartment 20 via a connecting pipe 77 with an internally arranged ventilation valve 76.

[0034] A power electronics unit 32 is located near the high-voltage traction battery 30, responsible for monitoring and controlling the traction battery 30 and supplying power to the traction motor 34. An electrical sensor 47 is assigned to the power electronics unit 32 as a fault sensor, which continuously acquires the terminal voltage U of the traction battery 30. A battery temperature sensor, a battery gas flow sensor, and a battery pressure sensor are physically assigned directly to the traction battery 30 as fault sensors 43, 44, and 45, respectively. The battery temperature sensor acquires the battery temperature T, either inside or outside the traction battery 30. The battery gas flow sensor is located in an exhaust path of the traction battery 30, where it quantitatively determines the gas flow rate Q. The battery pressure sensor acquires the internal pressure P of the traction battery 30.

[0035] In addition, another accident sensor 46 is directly allocated to the traction battery 30 in space. It is a battery gas sensor that can detect the presence of a certain battery gas or quantitatively detect the concentration C of a certain battery gas.

[0036] Finally, the emergency ventilation system 11 has an electronic emergency control system 40 and an emergency detector 41. The emergency detector 41 continuously monitors all emergency sensors 43-47 to determine if one of them indicates a critical exhaust measurement parameter. The limits of the measurement parameters T, Q, P, C, and U of the emergency sensors 43-47 are stored in the emergency detector 41. Once the emergency detector 41 detects that one of the emergency sensors 43-47 has a critical exhaust measurement parameter, the emergency control system 40 controls the integrated window control system 49 to close all sliding window 21 windows 26, opens the ventilation valve 76, and activates the emergency booster pump 54. During this process, the emergency control system 40 continuously monitors the passenger compartment gas pressure PI via the passenger compartment pressure sensor 42 and accordingly controls the exhaust valve 76 to set it to an overpressure of 10 mbar relative to the ambient atmospheric pressure PA.

[0037] Once the accident control system 40 receives a clear warning signal that can be manually triggered by a passenger, it will exit the accident operation mode.

Claims

1. An electric vehicle (10) having an emergency ventilation device (11), the electric vehicle having a high-voltage traction battery (30), a traction motor (34) powered by the high-voltage traction battery (30), and a passenger compartment (20), characterized in that, The electric vehicle includes: A fresh air storage tank (50) stores fresh air (51) at a pressure exceeding atmospheric pressure and is fluidly connected to the passenger compartment (20) via a connecting pipe (77) with an internally arranged ventilation valve (76). At least one fault sensor (43, 44, 45, 46, 47) detects the exhaust critical measurement parameters (T, Q, P, C, U) of the high-voltage traction battery (30), and An electronic accident control system (40) equipped with an accident detector (41) reports an accident upon receiving signals of the exhaust critical measurement parameters (T, Q, P, C, U) from the accident sensors (43, 44, 45, 46, 47). If the accident detector (41) reports an accident, the accident control system (40) will open the ventilation valve (76).

2. The electric vehicle (10) according to claim 1, characterized in that, The accident sensors (43, 44, 45, 46, 47) are a battery temperature sensor, a battery gas flow sensor, a battery pressure sensor, a battery gas sensor, and / or an electrical sensor.

3. The electric vehicle (10) according to claim 1 or 2, having at least one tilt-and-turn window (21) assigned to the passenger compartment (20) and a window glass (26) movable between an open position and a closed position by a window motor (28), characterized in that, The accident control system (40) has a window control system (49) electrically connected to the window motor (28), which moves the window glass (26) to its closed position if the accident detector (41) reports an accident.

4. The electric vehicle (10) according to claim 1 or 2, characterized in that, An electric booster pump (54) and an air filter (56) are fluidly connected to the fresh air tank (50) to pressurize the fresh air tank (50), wherein the accident control system (40) activates the booster pump (54) if the accident detector (41) reports an accident.

5. The electric vehicle (10) according to claim 1 or 2, characterized in that, It has multiple pneumatic spring elements (72) assigned to the wheels (70) and connected in fluid communication with the fresh air tank (50).

6. An emergency ventilation device (11) for an electric vehicle (10), the electric vehicle having a high-voltage traction battery (30), a traction motor (34) powered by the high-voltage traction battery (30), and a passenger compartment (20), having the features of the emergency ventilation device (11) as claimed in any of the preceding claims.

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