CN-121989726-A - Cooling device, method for operating a cooling device, and vehicle having a cooling device

Abstract

The application relates to a cooling device for cooling a charging contact (22) and/or a charging line (23). The cooling device according to the application comprises a forced ventilation (30) configured for conveying air outwards from the interior space of the vehicle. The cooling device according to the application further comprises an air channel (12) having an air channel outlet (13) configured for providing an air flow from the forced ventilation (30) to the charging contact (22) and/or charging line (23), wherein a ventilator (11) is further provided, which is configured for inducing or creating the air flow in the air channel (12).

Inventors

• J Baumgaertner
• P. Crowther
• D shellfish Yale

Assignees

• 保时捷股份公司

Dates

Publication Date

20260508

Application Date

20251105

Priority Date

20241105

Claims (10)

1. 1. A cooling device for cooling a charging contact (22) and/or a charging line (23) of a high voltage charging interface in a vehicle, the cooling device comprising: A forced ventilation portion (30) configured for conveying air outwardly from an interior space of the vehicle, An air channel (12) having an air channel outlet (13) configured for providing an air flow from the plenum (30) onto the charging contacts (22) and/or charging lines (23), wherein a ventilator (11) is further provided, which is configured for inducing the air flow in the air channel (12).
2. 2. Cooling device according to the preceding claim, wherein the forced ventilation (30) comprises an acoustic hood (31) configured for preventing sound from being transmitted from outside the inner space into the inner space.
3. 3. Cooling device according to the preceding claim, wherein the ventilator (11) is arranged in the acoustic enclosure (31).
4. 4. The cooling device according to any of the preceding claims, wherein the air channel outlet (13) comprises an air guiding element configured for targeted guiding out of air from the air channel (12).
5. 5. The cooling device according to any of the preceding claims, wherein the cooling device comprises a cooling body (14) in direct contact with the charging contacts (22) and/or the charging line (23), and the air channel outlet (13) is directed at least partially towards the cooling body (14).
6. 6. Cooling device according to the preceding claim, wherein the cooling body (14) is fixed via a spacer device (50) on a charging seat (21) carrying the charging contacts (22), and the charging line (23) passes through the interior of the cooling body (14).
7. 7. The cooling device according to any of the preceding claims, wherein the air channel outlet (13) is arranged below the charging contacts (22) and/or charging lines (23).
8. 8. A method for operating a cooling device according to any of the preceding claims during a charging process of a traction battery of a vehicle, the method comprising the steps of: (A) Detecting the temperature of the charging contact (T L ) (B) Comparing the temperature (T L ) of the charging contact with the allowable temperature (T L, Allow for ) of the charging contact, (C) If the temperature (T L ) of the charging contact is less than the permissible temperature (T L, Allow for ) of the charging contact, the temperature (T L ) of the charging contact is compared with the on temperature (T Ventilator , Switch on ) of the ventilator (11) of the cooling device, (D) If the temperature (T L ) of the charging contact is greater than the switching-on temperature (T Ventilator , Switch on ) of the ventilator (11), the ventilator (11) is switched on, (E) The temperature (T L ) of the charging contact is compared with the on-temperature (T air conditioner , Switch on ) of the air conditioner, (F) If the temperature (T L ) of the charging contact is greater than the on temperature (T air conditioner , Switch on ) of the air conditioner, the air conditioner is turned on.
9. 9. Method according to the preceding claim, wherein the switching-on temperature (T air conditioner , Switch on ) of the air conditioner is set as a function of the temperature (T L ) of the charging contact, in particular by a charging management system.
10. 10. A vehicle comprising a cooling apparatus according to any one of claims 1 to 7.

Description

Cooling device, method for operating a cooling device, and vehicle having a cooling device Technical Field The application relates to a cooling device for cooling a charging contact or a charging socket and/or a charging circuit, and to a method for operating a cooling device according to the application. The application also relates to a vehicle comprising a cooling device according to the application. Background When charging the traction battery of a hybrid vehicle or a battery electric vehicle at a charging point, high temperatures occur on the charging contacts of the charging connection and on the power line (charging line) leading to the high-voltage system, in particular the traction battery, due to the high current. A High Voltage (HV) system within the meaning of the application refers to the part of the electrical system of the vehicle that is exposed to high voltage power. This includes, among other things, traction batteries and their charge management systems, as well as electric tractors and their pulse inverters. Thus, the high voltage charging interface represents a charging interface for charging the traction battery. In order to achieve a short charging time, as much electrical energy as possible is supplied to the traction battery in as short a time as possible, thereby increasing the temperature load on the charging contacts and the charging line. Very high temperatures are reached, especially when charging with direct current (DC charging). If the temperature exceeds the maximum allowable temperature, the charging process must be throttled or even stopped for safety reasons. This results in longer waiting times when the battery is charged and thus may lead to customer dissatisfaction. Therefore, it is necessary to cool the charging contacts and/or the charging lines. There are different approaches to this. While active cooling systems with cooling plates and fluid circuits are effective, they are also complex and costly to install and maintain. To achieve better passive cooling, bus bars are used instead of round cables, which can better remove waste heat due to the changing geometry. In the context of the present application, both round cables and bus bars are understood to mean charging lines. In general, the cooling system must be robust enough to operate reliably even in extreme external temperatures. At the same time, they should be as compact and light as possible so as not to add too much extra weight to the vehicle or to occupy too much space in the vehicle. Therefore, the development of an efficient and cost-effective cooling concept for charging ports remains an important task for the automotive industry in order to further optimize the rapid charging of electric vehicles. Various systems for efficient and effective cooling are proposed in the prior art. Documents DE 10 2022 118 838 A1 and DE 10 2022 122 763 A1 describe a device for cooling a charging socket and a charging contact and a charging circuit of a motor vehicle contained therein, respectively, the cartridge comprising an air channel connected to an interior space of the motor vehicle, wherein the air channel comprises a ventilator, and wherein the air channel is configured for supplying power to a DC contact of the charging socket. However, a disadvantage of such systems is that they represent an acoustic connection from the outside of the vehicle to the interior space, and that they must be correspondingly acoustically isolated in order not to reduce the comfort of the occupants. Document DE 10 2021 112 623 A1 describes a device for cooling a charging stand of a motor vehicle, comprising an air channel connected to an outer surface of the motor vehicle, wherein the air channel comprises a ventilator, and wherein the air channel is configured for supplying power to a DC contact of the charging stand. However, the problem arises here that, in particular in the case of high external temperatures, the cooling of the charging contacts can only take place in an inefficient manner. Disclosure of Invention In view of the described background of the prior art, the problem addressed by the present invention is to provide an alternative and improved form of cooling device for cooling charging contacts and/or charging lines of a high voltage charging interface in a vehicle. A further object of the invention is to provide a method for operating a cooling device and a vehicle having a cooling device according to the invention. The cooling device according to the application comprises a forced ventilation portion configured for conveying air outwards from the interior space of the vehicle. Forced ventilation in vehicles is specifically designed as a system that specifically conducts exhaust gases and moisture from the interior space, but cannot be adjusted manually by the user. The system is therefore designed to actively direct exhaust gases away from the vehicle. This is used in particular to achieve an effective air condition