On-vehicle high-voltage power supply temperature reporting method, system, vehicle and storage medium

Abstract

The present invention discloses a vehicle-mounted high-voltage power supply temperature reporting method, system, vehicle and storage medium, comprising the following steps: collecting the temperature of each temperature-sensitive device in the high-voltage power supply; normalizing each temperature; comparing the normalized data to obtain the maximum temperature; and reporting the maximum temperature as the reported temperature value of the high-voltage power supply. The temperature reported by the present invention can accurately reflect the actual temperature of the high-voltage power supply.

Description

Technical Field

[0001] The present invention belongs to the technical field of high-voltage power supplies for electric vehicles, and in particular relates to a method, system, vehicle and storage medium for reporting the temperature of a vehicle-mounted high-voltage power supply. Background Art

[0002] At present, there are many power conversion devices on electric vehicles, such as on-board chargers and DC converters. The on-board charger converts the AC power of the power grid into DC power to charge the power battery of the electric vehicle, and the DC converter converts the high voltage of the power battery into a low voltage for use by the low-voltage system of the entire vehicle. These devices use a large number of power devices such as MOS tubes / IGBTs, transformers, electrolytic capacitors and other heat-generating devices. These devices are also temperature-sensitive devices and need to work under appropriate temperature conditions. If the rated temperature is exceeded, a derating strategy must be adopted to reduce the output power of the high-voltage power supply to ensure the normal design life of the high-voltage power supply.

[0003] For example, in a charger and electric vehicle disclosed in patent document 1 (CN201611153281.X), the internal and external temperatures of the charger are reported to the controller separately, which will occupy communication resources, and the internal temperature calculation strategy is not clear. For another example, patent document 2 (201910263309.2) discloses a charging control system and charging control method of a charger, and an electric vehicle. Although temperature protection is also mentioned, it emphasizes that by comparing the actual temperature rise slope of the charger with the expected temperature rise slope, and adjusting the charging power of the charger accordingly according to the deviation of the actual temperature rise slope from the expected temperature rise slope, the temperature rise condition of the charger during the expected charging time period can conform to the preset temperature rise condition. The number of internal temperature collection points and the reporting strategy are not specified.

[0004] Under normal circumstances, the high-voltage power supply needs to report the temperature to the vehicle controller, and the thermal management system will execute the opening and closing operations of the water pump and the condensing fan according to the reported temperature. Generally, the high-voltage power supply only reports one temperature (ambient temperature or other device temperature), but different vehicle models, different overall layout positions, different input voltages, different output currents and other working conditions will have different effects on the high-voltage power supply temperature, so the reported temperature cannot fully reflect the actual temperature of the high-voltage power supply.

[0005] Therefore, it is necessary to develop a new on-board high-voltage power supply temperature reporting method, system, vehicle and storage medium. Summary of the invention

[0006] The object of the present invention is to provide a method, system, vehicle and storage medium for reporting the temperature of a vehicle-mounted high-voltage power supply, wherein the reported temperature can accurately reflect the actual temperature of the high-voltage power supply.

[0007] A method for reporting the temperature of a vehicle-mounted high-voltage power supply according to the present invention comprises the following steps:

[0008] Collect the temperature of each temperature-sensitive device in the high-voltage power supply;

[0009] Normalize each temperature;

[0010] Compare the normalized data to get the maximum temperature;

[0011] The maximum temperature is reported as the reported temperature value of the high voltage power supply.

[0012] Optionally, each temperature is normalized as follows:

[0013]

[0014] Among them, T iG is the normalized temperature value of the ith temperature sensitive device, T i is the measured temperature value of the i-th temperature sensitive device, T i ' is the derating temperature value of the i-th temperature sensitive device, T0 is the hazard value of the water temperature of the vehicle cooling system, which can further accurately reflect the actual temperature of the high-voltage power supply.

[0015] Optionally, the normalized data are compared to obtain the maximum temperature, specifically:

[0016] Ts=max{T 1G ,T 2G ,…,T iG ,…,T nG}

[0017] Wherein: Ts is the reported temperature value. Taking the maximum value as the reported temperature value can accurately reflect the real temperature inside the power supply and occupy less bus resources.

[0018] Optionally, when the temperature sensitive device is overheated, that is, T i Greater than T i ', through T i The fault code comparison table is used to obtain the fault code Num_x corresponding to the temperature sensitive device, wherein the fault code comparison table specifies T1 to T n The fault codes corresponding to the overheating of the temperature-sensitive device are Num_1 to Num_n, which can determine which temperature-sensitive device has overheated.

[0019] In a second aspect, a vehicle-mounted high-voltage power supply temperature reporting system according to the present invention comprises:

[0020] A temperature acquisition module is used to collect the temperature of each temperature-sensitive device in the high-voltage power supply;

[0021] A temperature normalization processing module is used to perform normalization processing on each temperature, and the temperature normalization processing module is connected to the temperature acquisition module;

[0022] A temperature comparison module, used for comparing the normalized data to obtain the maximum temperature, and the temperature comparison module is connected to the temperature normalization processing module;

[0023] The temperature reporting module is used to report the maximum temperature as the reported temperature value of the high voltage power supply. The temperature reporting module is connected to the temperature comparison module.

[0024] In a third aspect, a vehicle described in the present invention adopts the on-board high-voltage power supply temperature reporting system described in the present invention.

[0025] In a fourth aspect, a storage medium described in the present invention stores a computer-readable program therein, and when the computer-readable program is called, it can execute the steps of the vehicle-mounted high-voltage power supply temperature reporting method described in the present invention.

[0026] The present invention has the following advantages: the high-voltage power supply collects the temperature of each temperature-sensitive device through a temperature acquisition circuit, normalizes each temperature, compares the normalized data, and reports the maximum value to the vehicle controller for unified processing. The maximum value can accurately reflect the real temperature inside the power supply. When a temperature-sensitive device overheats, the vehicle-mounted high-voltage power supply will report a fault code at the same time. By analyzing the meaning of the fault code, it can be determined which temperature-sensitive device has overheated, and the specific temperature value of the part can be analyzed. In addition, the present invention occupies less bus resources, so it will not increase the bus load. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a flow chart of this embodiment;

[0028] Figure 2 is a system block diagram of this embodiment;

[0029] Figure 3 This is a schematic diagram of the present embodiment. DETAILED DESCRIPTION

[0030] The present invention will be described in detail below with reference to the accompanying drawings.

[0031] like Figure 1 and Figure 3 As shown, in this embodiment, a method for reporting the temperature of a vehicle-mounted high-voltage power supply includes the following steps:

[0032] Collect the temperature of each temperature-sensitive device in the high-voltage power supply

[0033] Normalize each temperature;

[0034] Compare the normalized data to get the maximum temperature;

[0035] The maximum temperature is reported as the reported temperature value of the high voltage power supply.

[0036] In this embodiment, each temperature is normalized as follows:

[0037]

[0038] Among them, T iG is the normalized temperature value of the ith temperature sensitive device, T i is the measured temperature value of the i-th temperature sensitive device, T i ' is the derating temperature value of the ith temperature sensitive device, and T0 is the hazard value of the water temperature of the cooling system of the vehicle system.

[0039] In this embodiment, the normalized data are compared to obtain the maximum temperature, specifically:

[0040] Ts=max{T 1G ,T 2G ,…,T iG ,…,T nG}

[0041] Where: Ts is the reported temperature value. Taking the maximum value as the reported temperature value can accurately reflect the actual temperature inside the power supply.

[0042] In this embodiment, when a temperature sensitive device is overheated, that is, T i Greater than T i ', through T i The fault code comparison table (see Table 1) is used to obtain the fault code Num_x corresponding to the temperature sensitive device, wherein the fault code comparison table specifies T1 to T n The fault codes corresponding to the overheating of the temperature sensitive device are Num_1 to Num_n. The subsequent controller can determine which temperature sensitive device has overheated by analyzing the meaning of the fault code Num_x, and can analyze the temperature value of the part.

[0043] Table 1:

[0044] Temperature sensitive devices Measured temperature Report fault code 1 <![CDATA[T1]]> Num_1 2 <![CDATA[T2]]> Num_2 3 <![CDATA[T3]]> Num_3 … … … n <![CDATA[T n ]]> Num_n

[0045] In this embodiment, when the temperature sensitive device is overheated, that is, T i Greater than T i ', the internal strategy of the high-voltage power supply can also reduce the output power, or take accelerated heat dissipation measures to ensure that the internal components of the high-voltage power supply are not damaged by overheating.

[0046] like Figure 2 As shown, in this embodiment, a vehicle-mounted high-voltage power supply temperature reporting system includes a controller and a memory, in which a computer-readable program is stored. When the computer-readable program is called by the controller, the steps of the vehicle-mounted high-voltage power supply temperature reporting method described in this embodiment can be executed.

[0047] In one example, when the reported temperature is T s If the fault code is Num_5, it can be confirmed as T 5G The value is the normalized maximum temperature value, and it can be judged that the device corresponding to T5 is overheated, and the formula The specific temperature value of T5 can be calculated.

[0048] According to the high-voltage power supply requirements, the vehicle cooling system water temperature hazard value T0 = 75 ° C, the vehicle high-voltage power supply reported temperature T s =78℃ and there is a fault code Num_5. According to the high-voltage power supply fault code report table, Num_5 is specified as the corresponding over-temperature fault of X5 high-voltage LLC_MOS. At this time, T5' is the corresponding derating temperature of high-voltage LLC_MOS, which is specified as 85℃, so it can be calculated that T5=78*85 / 75℃=88.4℃.

[0049] In this embodiment, a vehicle adopts the vehicle-mounted high-voltage power supply temperature reporting system as described in this embodiment.

[0050] In this embodiment, a storage medium described in the present invention stores a computer-readable program, and when the computer-readable program is called, it can execute the steps of the vehicle-mounted high-voltage power supply temperature reporting method described in the present invention.

[0051] The above embodiments are preferred implementation modes of the method of the present invention, but the implementation modes of the method 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 modes and shall be included in the protection scope of the present invention.

Claims

1. A method for reporting the temperature of a vehicle-mounted high-voltage power supply, characterized in that: The following steps are involved: Collect the temperature of each temperature-sensitive device in the high-voltage power supply; Each temperature is normalized as follows: Among them, T iG is the normalized temperature value of the ith temperature sensitive device, T i is the measured temperature value of the i-th temperature sensitive device, T i , is the derating temperature value of the i-th temperature sensitive device, T0 is the hazard value of the water temperature of the cooling system of the vehicle system; Compare the normalized data to get the maximum temperature; The maximum temperature is reported as the reported temperature value of the high voltage power supply.

2. The vehicle-mounted high-voltage power supply temperature reporting method according to claim 1 is characterized in that: Compare the normalized data to get the maximum temperature, specifically: Ts=max{T 1G ,T 2G ,…,T iG ,…,T nG } Where: Ts is the reported temperature value.

3. The vehicle-mounted high voltage power supply temperature reporting method according to claim 1 or 2, characterized in that: When the temperature sensitive device is overheated, that is, T i Greater than T i , through T i The fault code comparison table is used to obtain the fault code Num_x corresponding to the temperature sensitive device, wherein the fault code comparison table specifies T1 to T n The fault codes corresponding to overtemperature of the temperature-sensitive device are Num_1 to Num_n.

4. A vehicle-mounted high voltage power supply temperature reporting system, characterized in that: include: A temperature acquisition module is used to collect the temperature of each temperature-sensitive device in the high-voltage power supply; A temperature normalization processing module is used to perform normalization processing on each temperature, and the temperature normalization processing module is connected to the temperature acquisition module; A temperature comparison module, used for comparing the normalized data to obtain the maximum temperature, and the temperature comparison module is connected to the temperature normalization processing module; A temperature reporting module, used to report the maximum temperature as the reported temperature value of the high voltage power supply, the temperature reporting module and the temperature comparison module; Each temperature is normalized as follows: Among them, T iG is the normalized temperature value of the ith temperature sensitive device, T i is the measured temperature value of the i-th temperature sensitive device, T i , is the derating temperature value of the i-th temperature sensitive device, and T0 is the hazard value of the water temperature of the cooling system of the vehicle system.

5. The vehicle-mounted high-voltage power supply temperature reporting method according to claim 4 is characterized in that: Compare the normalized data to get the maximum temperature, specifically: Ts=max{T 1G ,T 2G ,…,T iG ,…,T nG } Where: Ts is the reported temperature value.

6. The vehicle-mounted high voltage power supply temperature reporting method according to claim 4 or 5, characterized in that: When the temperature sensitive device is overheated, that is, T i Greater than T i , through T i The fault code comparison table is used to obtain the fault code Num_x corresponding to the temperature sensitive device, wherein the fault code comparison table specifies T1 to T n The fault codes corresponding to overtemperature of the temperature-sensitive device are Num_1 to Num_n.

7. A vehicle, characterized in that: A vehicle-mounted high-voltage power supply temperature reporting system as described in any one of claims 4 to 6 is adopted.

8. A storage medium, characterized in that: A computer-readable program is stored therein, and when the computer-readable program is called, the steps of the vehicle-mounted high-voltage power supply temperature reporting method as described in any one of claims 1 to 3 can be executed.

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