High-voltage distribution box control method and device, electronic equipment and readable storage medium

Abstract

The invention discloses a high-voltage distribution box control method. The method comprises the following steps: determining a temperature acquisition point of a high-voltage distribution box; a first temperature sensor and a second temperature sensor are arranged on the same temperature acquisition point; a first temperature sensor and a second temperature sensor simultaneously collect the temperature of a temperature collection point on the high-voltage distribution box to obtain a first temperature and a second temperature; wherein the first temperature sensor and the second temperature sensor are mutually independent; judging whether the consistency degree of the first temperature and the second temperature meets a preset condition or not; if the preset condition is met, the high-voltage distribution box is controlled to work or be powered off according to the first temperature and / or the second temperature; and if the preset condition is not met, determining that a temperature information acquisition fault exists, and performing fault processing. According to the method, whether the high-voltage distribution box works or is powered off is controlled according to the measured temperature, and the accuracy of temperature detection can be improved. The invention further discloses a high-voltage distribution box control device, electronic equipment and a computer readable storage medium.

Description

Technical Field

[0001] The present invention relates to the field of high-voltage distribution box control technology, and in particular to a high-voltage distribution box control method, a high-voltage distribution box control device, an electronic device and a computer-readable storage medium. Background Art

[0002] With the development of new energy technology, the performance of new energy vehicles is getting stronger and stronger, and the power, current and voltage requirements of power batteries are getting higher and higher. While high power and high current bring performance, the safety requirements of distribution boxes are also getting higher and higher. High power and high current make the internal electrical components and copper bars of the high-voltage distribution box generate more heat. Especially during long-term high-speed driving, the heat generated inside the high-voltage distribution box increases exponentially, which brings great challenges to the electrical safety of new energy vehicles.

[0003] At present, the existing technologies mainly adopt the following methods to safely mitigate the increase in heat in high-voltage distribution boxes: increase the cross-sectional area of ​​the copper busbar; select electrical components with larger current carrying capacity; and use water-cooled high-voltage distribution boxes. The above existing technologies only adopt a passive method, that is, only achieve high-voltage safety by improving heat dissipation, which is difficult to achieve complete electrical safety.

[0004] In addition, in the prior art, the temperature sensor inside the high-voltage distribution box only monitors the temperature of the electrical components, and then adjusts the heat dissipation according to the measured temperature. Only one temperature sensor is used for detection, and the temperature measurement is not accurate enough to meet the functional safety requirements. Summary of the invention

[0005] The present invention proposes a high-voltage distribution box control method to solve the above-mentioned problem.

[0006] In a first aspect, an embodiment of the present invention discloses a high-voltage distribution box control method, comprising:

[0007] Determine the temperature collection point of the high-voltage distribution box; a first temperature sensor and a second temperature sensor are provided at the same temperature collection point;

[0008] The first temperature sensor and the second temperature sensor simultaneously collect the temperature of the temperature collection point on the high-voltage distribution box, the temperature collected by the first temperature sensor is the first temperature, and the temperature collected by the second temperature sensor is the second temperature; wherein the first temperature sensor and the second temperature sensor are independent of each other;

[0009] Determining whether the consistency between the first temperature and the second temperature meets a preset condition;

[0010] If the preset conditions are met, the high-voltage distribution box is controlled to work or be powered off according to the first temperature and / or the second temperature;

[0011] If the preset conditions are not met, there is a temperature information collection failure and the fault is handled.

[0012] By adopting the above technical scheme, the high-voltage distribution box control method of the present invention improves the reliability and accuracy of temperature detection by setting two temperature sensors at the same temperature collection point and measuring the temperature of the same temperature collection point through the two temperature sensors. It also solves the problem of excessive temperature of the high-voltage distribution box from the source of heat generation of the high-voltage distribution box by controlling whether the high-voltage distribution box is working or powered off according to the measured temperature, thereby meeting functional safety requirements.

[0013] According to another specific embodiment of the present invention, controlling the high-voltage distribution box to operate or power off according to the first temperature and / or the second temperature specifically includes:

[0014] Determine the actual temperature of the temperature collection point on the high-voltage distribution box according to the first temperature and / or the second temperature;

[0015] Determine whether the actual temperature is within a first preset temperature range; wherein the first preset temperature range is determined according to a temperature range within which the high-voltage distribution box can maintain operation;

[0016] If the actual temperature is within the first preset temperature range, the current output by the high-voltage distribution box is controlled to be reduced to a first limiting current when it is working;

[0017] If the actual temperature is not within the first preset temperature range, determine whether the actual temperature is within the second preset temperature range; wherein the second preset temperature range is determined based on the temperature range in which the high-voltage distribution box has a risk of overheating but can still recover autonomously;

[0018] If the actual temperature is within the second preset temperature range, the current output by the high-voltage distribution box is controlled to be reduced to a second limiting current; the second limiting current is lower than the first limiting current;

[0019] If the actual temperature is not within the second preset temperature range, determine whether the actual temperature is within a third preset temperature range; wherein the third preset temperature range is determined according to the temperature range in which the high-voltage distribution box has a risk of over-temperature damage;

[0020] If the actual temperature is within the third preset temperature range, the high voltage distribution box is controlled to be powered off;

[0021] If the actual temperature is not within the third preset temperature range, the high-voltage distribution box operates normally and outputs normal current.

[0022] According to another specific embodiment of the present invention, determining the actual temperature of the temperature collection point on the high-voltage distribution box according to the first temperature and / or the second temperature specifically includes:

[0023] Determine the first temperature as the actual temperature of the temperature collection point on the high-voltage distribution box;

[0024] Or determine the second temperature as the actual temperature of the temperature collection point on the high-voltage distribution box;

[0025] Or determine that the average temperature of the first temperature and the second temperature is the actual temperature of the temperature collection point on the high-voltage distribution box.

[0026] According to another specific embodiment of the present invention, the first preset temperature range is 125°C≤T<150°C,

[0027] and / or, the second preset temperature range is 150°C≤T<180°C,

[0028] and / or, the third preset temperature range is 180°C ≤ T,

[0029] and / or, the first limiting current is 0<I<50A,

[0030] and / or, the second limiting current is 0A,

[0031] And / or, the normal current is 150≤I≤200A.

[0032] According to another specific embodiment of the present invention, determining whether the consistency between the first temperature and the second temperature meets a preset condition specifically includes:

[0033] Determine whether the difference between the first temperature and the second temperature is within a reasonable error range;

[0034] If so, it is determined that the consistency between the first temperature and the second temperature meets a preset condition;

[0035] If not, it is determined that the consistency between the first temperature and the second temperature does not meet the preset condition.

[0036] According to another specific embodiment of the present invention, the high-voltage distribution box includes a main positive relay and a main negative relay, and determining the temperature collection point of the high-voltage distribution box specifically includes:

[0037] It is determined that there are two temperature collection points, which are located at the pole of the main positive relay and the pole of the main negative relay respectively.

[0038] According to another specific embodiment of the present invention, a first temperature sensor and a second temperature sensor simultaneously collect the temperature of a temperature collection point on a high-voltage distribution box, the temperature collected by the first temperature sensor is a first temperature, and the temperature collected by the second temperature sensor is a second temperature, specifically including:

[0039] The first temperature sensor and the second temperature sensor are controlled by the BQ79731 chip to simultaneously collect the temperature of the temperature collection point on the high-voltage distribution box. The temperature collected by the first temperature sensor is the first temperature, and the temperature collected by the second temperature sensor is the second temperature.

[0040] In a second aspect, an embodiment of the present invention discloses a high-voltage distribution box control device, comprising:

[0041] A collection point determination module is used to determine the temperature collection point of the high-voltage distribution box; a first temperature sensor and a second temperature sensor are provided at the same temperature collection point;

[0042] A temperature detection module is used for a first temperature sensor and a second temperature sensor to simultaneously collect the temperature of a temperature collection point on a high-voltage distribution box, wherein the temperature collected by the first temperature sensor is a first temperature, and the temperature collected by the second temperature sensor is a second temperature; wherein the first temperature sensor and the second temperature sensor are independent of each other;

[0043] The judgment and control module is used to judge whether the consistency between the first temperature and the second temperature meets the preset conditions; if the preset conditions are met, the high-voltage distribution box is controlled to work or power off according to the first temperature and / or the second temperature; if the preset conditions are not met, there is a temperature information collection failure, and the fault is handled.

[0044] By adopting the above technical scheme, the high-voltage distribution box control device of the present invention improves the reliability and accuracy of temperature detection by setting two temperature sensors at the same temperature collection point, and measures the temperature of the same temperature collection point through the two temperature sensors. It also solves the problem of excessive temperature of the high-voltage distribution box from the source of heat generation of the high-voltage distribution box by controlling whether the high-voltage distribution box is working or powered off according to the measured temperature, and can meet functional safety requirements.

[0045] In a third aspect, an embodiment of the present invention discloses an electronic device, including a processor and a memory, wherein the memory stores at least one instruction, and when the at least one instruction is executed by the processor, the high-voltage distribution box control method in any of the aforementioned embodiments is implemented.

[0046] By adopting the above technical solution, the electronic equipment sets two temperature sensors at the same temperature collection point, and measures the temperature of the same temperature collection point through the two temperature sensors, thereby improving the reliability and accuracy of temperature detection. It also solves the problem of excessive temperature of the high-voltage distribution box from the source of heat generation of the high-voltage distribution box by controlling whether the high-voltage distribution box is working or powered off according to the measured temperature, thereby meeting functional safety requirements.

[0047] In a fourth aspect, an embodiment of the present invention discloses a computer-readable storage medium, in which at least one instruction is stored. When the at least one instruction is executed, the high-voltage distribution box control method in any of the aforementioned embodiments is implemented.

[0048] By adopting the above technical solution, the computer-readable storage medium sets two temperature sensors at the same temperature collection point, and measures the temperature of the same temperature collection point through the two temperature sensors, thereby improving the reliability and accuracy of temperature detection. It also solves the problem of excessive temperature of the high-voltage distribution box from the source of heat generation of the high-voltage distribution box by controlling whether the high-voltage distribution box is working or powered off according to the measured temperature, thereby meeting functional safety requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 A schematic diagram showing the process of the high voltage distribution box control method in an embodiment of the present invention Figure 1 ;

[0050] Figure 2 A schematic diagram showing the process of the high voltage distribution box control method in an embodiment of the present invention Figure 2 ;

[0051] Figure 3 A schematic diagram showing the process of the high voltage distribution box control method in an embodiment of the present invention Figure 3 ;

[0052] Figure 4 A schematic diagram showing the structure of a high-voltage distribution box control device in an embodiment of the present invention is shown;

[0053] Figure 5 A schematic diagram showing the structure of an electronic device in an embodiment of the present invention is shown;

[0054] Figure 6 A schematic structural diagram of a high-voltage distribution box in an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0055] The following specific embodiments illustrate the implementation of the present invention, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Although the description of the present invention will be introduced in conjunction with the preferred embodiment, this does not mean that the features of this invention are limited to this implementation. On the contrary, the purpose of introducing the invention in conjunction with the implementation is to cover other options or modifications that may extend based on the claims of the present invention. In order to provide a deep understanding of the present invention, the following description will include many specific details. The present invention can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present invention, some specific details will be omitted in the description. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0056] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0057] The terms “first”, “second”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0058] In the description of this embodiment, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this embodiment can be understood according to specific circumstances.

[0059] In order to make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0060] The inventors carefully studied the existing technologies and found that the existing technologies can only detect the temperature of the electrical components inside the high-voltage distribution box, and only achieve heat dissipation of the high-voltage distribution box by improving the type of electrical components, the cross-sectional area of ​​the copper bar or adding a water cooling module. There are problems such as inaccurate temperature detection, passive heat dissipation, difficulty in ensuring electrical safety, and difficulty in meeting functional safety requirements. The inventors hope to solve the above problems.

[0061] First, reference Figure 1 , an embodiment of the present invention discloses a high voltage distribution box control method, comprising the following steps:

[0062] S1: Determine the temperature collection point of the high-voltage distribution box.

[0063] Wherein, two temperature sensors are arranged at the same temperature collection point, namely a first temperature sensor and a second temperature sensor. The first temperature sensor and the second temperature sensor can be of the same model.

[0064] By setting two temperature sensors at the same temperature collection point, and only setting two temperature sensors, one of which can collect temperature and the other can be used to calibrate the detected temperature, it helps to improve the accuracy and reliability of temperature detection.

[0065] S2: The first temperature sensor and the second temperature sensor simultaneously collect the temperature of the temperature collection point on the high-voltage distribution box. The temperature collected by the first temperature sensor is the first temperature, and the temperature collected by the second temperature sensor is the second temperature.

[0066] The first temperature sensor and the second temperature sensor are independent of each other. By setting the first temperature sensor and the second temperature sensor to be independent of each other, when a problem occurs in the detection result of one temperature sensor, it is unlikely that a problem will occur in the other temperature sensor at the same time, that is, the two temperature sensors will not fail or detect inaccurately at the same time, which helps to further improve the accuracy and reliability of temperature acquisition.

[0067] S3: Determine whether the consistency between the first temperature and the second temperature meets a preset condition.

[0068] If the preset conditions are met, step S31 is executed: the high-voltage distribution box is controlled to operate or be powered off according to the first temperature and / or the second temperature.

[0069] If the preset condition is not met, step S32 is executed: there is a temperature information collection failure, and the failure is handled.

[0070] The preset condition may be, for example, that the difference between the first temperature and the second temperature is within a reasonable error range. When the difference between the first temperature and the second temperature is within a reasonable error range, it can be considered that the consistency between the first temperature and the second temperature meets the preset condition.

[0071] If the preset conditions are met, it means that the temperatures collected by the two temperature sensors are accurate, there is no detection problem, and the actual temperature at the temperature collection point can be reflected by the first temperature, the second temperature, or a combination of the first temperature and the second temperature.

[0072] If the preset conditions are not met, it means that the temperatures collected by the two temperature sensors are inaccurate, there is a detection problem, and there is a temperature information collection failure. It is necessary to check to find out the cause of the inaccurate detection problem and deal with the temperature information collection failure accordingly to solve the problem of inaccurate temperature detection.

[0073] By adopting the above technical solution, the high-voltage distribution box control method of the present invention improves the reliability and accuracy of temperature detection by setting two temperature sensors at the same temperature collection point and measuring the temperature of the same temperature collection point through the two temperature sensors. It also solves the problem of excessive temperature of the high-voltage distribution box from the source of the heat generation of the high-voltage distribution box by controlling whether the high-voltage distribution box is working or powered off according to the measured temperature, and can meet the functional safety requirements. More specifically, the above high-voltage distribution box control method can meet the requirements of functional safety level D. Among them, functional safety level D is the highest safety requirement level in ISO 26262, the international standard for functional safety in the automotive industry.

[0074] Further, in the above embodiment, reference Figure 2 The aforementioned step S31 specifically includes the following steps:

[0075] S311: Determine the actual temperature of the temperature collection point on the high-voltage distribution box according to the first temperature and / or the second temperature.

[0076] S312: Determine whether the actual temperature is within a first preset temperature range.

[0077] Among them, the first preset temperature range is determined according to the temperature range in which the high-voltage distribution box can maintain operation. Maintaining operation means that the high-voltage distribution box can continue to maintain operation when the temperature is high without any danger. The lower limit temperature value of the first preset temperature range is a temperature higher than the temperature at which the high-voltage distribution box can operate normally and safely. The upper limit temperature value of the first preset temperature range is the highest temperature at which the high-voltage distribution box can maintain operation. Normal and safe operation means working with normal current and there is no risk of overheating. Exemplarily, the first preset temperature range can be 125℃≤T<150℃.

[0078] If the actual temperature is within the first temperature preset range, execute step S313: control the current output by the high-voltage distribution box to be reduced to the first limiting current when it is working. At this time, the high-voltage distribution box can only maintain operation, but cannot work normally and safely. Exemplarily, the first limiting current is 0<I<50A. By reducing the operating current to the first limiting current, the heat generated during operation can be reduced, thereby giving the high-voltage distribution box time to dissipate heat autonomously and restore normal temperature.

[0079] If the actual temperature is not within the first preset temperature range, step S314 is executed: determining whether the actual temperature is within the second preset temperature range.

[0080] The second preset temperature range is determined according to the temperature range in which the high-voltage power distribution box has a risk of overheating but can still recover autonomously. Exemplarily, the second preset temperature range may be 150°C≤T<180°C.

[0081] If the actual temperature is within the second preset temperature range, execute step S315: control the current output by the high-voltage distribution box to be reduced to the second limiting current. The second limiting current is lower than the first limiting current. This indicates that the temperature of the high-voltage distribution box is high. If it continues to work with the first limiting current, it will easily lead to continued temperature rise, which may cause damage or cause an accident. It is necessary to further limit the working current so that the high-voltage distribution box can slowly return to normal. Exemplarily, the second limiting current can be 0A. At this point, it means that under the first limiting current, the high-voltage distribution box still cannot autonomously restore the normal temperature, and it is necessary to further limit the working current to observe whether the temperature of the high-voltage distribution box can autonomously return to normal when the current is further limited.

[0082] If the actual temperature is not within the second preset temperature range, step S316 is performed: determining whether the actual temperature is within a third preset temperature range. The third preset temperature range is determined according to the temperature range in which the high-voltage distribution box has a risk of overheating damage. For example, the third preset temperature range may be 180°C≤T.

[0083] If the actual temperature is within the third preset temperature range, step S317 is executed: the high-voltage distribution box is powered off. At this time, it means that the temperature of the high-voltage distribution box is too high. Continuing to maintain a high temperature may cause overheating damage or cause more serious accidents. It is necessary to immediately power off to prevent the temperature from rising further.

[0084] If the actual temperature is not within the third preset temperature range, step S318 is executed: the high-voltage distribution box works normally and outputs normal current. At this time, it means that the temperature of the high-voltage distribution box is within the temperature range in which the high-voltage distribution box can work normally and safely, and can work with normal current. Exemplarily, the normal current is 150≤I≤200A.

[0085] By adopting the above technical solution, the present invention collects the temperature of the same temperature collection point through dual sensors, thereby enhancing safety redundancy. If one temperature sensor fails, the other temperature sensor can accurately determine the failure result, and can also send the failure result to the control unit (such as the control unit of the power management system BMS) for processing. The present invention also directly actively controls the high-voltage distribution box according to the detected temperature, which adds an extra layer of protection to the safety of the high-voltage distribution box and related power batteries, and can prevent the high-voltage distribution box from further heating up from the source, rather than relying on external equipment to cool it down, or relying on passive methods such as improving the material structure of the internal components of the high-voltage distribution box to prevent the high-voltage distribution box from further heating up. The above method of the present invention has higher reliability and higher safety.

[0086] Further, in the above embodiment, the aforementioned step S311 may specifically include: determining the first temperature as the actual temperature of the temperature collection point on the high-voltage distribution box; or determining the second temperature as the actual temperature of the temperature collection point on the high-voltage distribution box; or determining the average temperature of the first temperature and the second temperature as the actual temperature of the temperature collection point on the high-voltage distribution box.

[0087] Among them, when the first temperature sensor is used to measure and collect temperature, and the second temperature sensor is used to collect and calibrate temperature, the first temperature collected by the first temperature sensor can be used as the actual temperature. When the second temperature sensor is used to measure and collect temperature, and the first temperature sensor is used to collect and calibrate temperature, the second temperature collected by the second temperature sensor can be used as the actual temperature. In addition, the first temperature and the second temperature can be compared, and the maximum temperature of the first temperature and the second temperature can be selected as the actual temperature of the temperature collection point.

[0088] Since the method of setting up two sensors at the same temperature collection point can accurately collect temperature, the first temperature can be directly used as the actual temperature of the temperature collection point on the high-voltage distribution box, and the second temperature can be directly used as the actual temperature of the temperature collection point on the high-voltage distribution box. In addition, even if the two temperature sensors are of the same model, there may be slight differences in the temperatures collected, so the average temperature of the first temperature and the second temperature can also be calculated, and the average temperature can be used as the actual temperature of the temperature collection point on the high-voltage distribution box.

[0089] Further, in the above embodiments, reference is made to Figure 3 , the aforementioned step S3 specifically includes the following steps:

[0090] S30: Determine whether the difference between the first temperature and the second temperature is within a reasonable error range.

[0091] If yes, then execute step S301: determine whether the consistency between the first temperature and the second temperature satisfies a preset condition.

[0092] If not, step S302 is executed: determining whether the consistency between the first temperature and the second temperature does not satisfy a preset condition.

[0093] Among them, the preset condition in step S3 may mean that the difference between the first temperature and the second temperature is within a reasonable error range. Two temperature sensors simultaneously collect the temperature of the same temperature collection point. Even if different temperature sensors have the same specifications, they may not collect the same temperature exactly due to slight interference, but may have slight differences. Within a reasonable error range, it can be considered that the consistency between the first temperature and the second temperature meets the preset condition. A reasonable error range can, for example, be that the absolute value of the difference between the first temperature and the second temperature is within the range of 0-5°C.

[0094] Further, in the above embodiments, the high-voltage distribution box includes a main positive relay and a main negative relay, and the above step S1 may include the following steps: determining two temperature collection points, which are located at the pole of the main positive relay and the pole of the main negative relay respectively.

[0095] Among them, when determining the temperature collection point, the temperature of each electrical component in the high-voltage distribution box can be detected in real time when the high-voltage distribution box is working, and a temperature simulation test can be performed. According to the temperature changes of each electrical component and the working conditions of the high-voltage distribution box, representative locations are selected to set the temperature collection points.

[0096] For example, in this embodiment, further reference is made to Figure 6, it was found through testing that the highest temperature point appears at the position of the pole of the main positive relay 7 and the position of the pole of the main negative relay 5, and the above two positions are more representative. Therefore, two temperature collection points are set, which are located at the position of the pole of the main positive relay 7 and the position of the pole of the main negative relay 5 respectively. The main positive relay 7 is used to connect or disconnect the circuit between the positive pole of the high-voltage battery pack and other components of the high-voltage system (such as motors, inverters, chargers, etc.), and the main negative relay 5 is used to connect and disconnect the circuit between the negative pole of the high-voltage battery pack and the vehicle chassis. The two cooperate with each other to ensure the integrity and safety of the high-voltage system. The main positive relay 7 and the main negative relay 5 are representative temperature detection positions. In other embodiments, the temperature collection point can also be set at a position close to the poles of the main positive relay 7 and the main negative relay 5, as long as the temperature of the main positive relay 7 and the main negative relay 5 can be detected.

[0097] refer to Figure 6 , Figure 6 A high-voltage distribution box 11 is shown, in which two temperature collection points are provided. The first temperature collection point is set on the pole of the main positive relay 7, and two temperature sensors are provided on this temperature collection point, namely, the first temperature sensor 3 and the second temperature sensor 4. The second temperature collection point is set on the pole of the main negative relay 5, and two temperature sensors are also provided on this temperature collection point, namely, the first temperature sensor 9 and the second temperature sensor 10.

[0098] By setting temperature collection points only on the poles of the main positive relay 7 and the main negative relay 5, and setting two temperature sensors at each temperature collection point, one temperature sensor can play the role of temperature detection and collection, and the other temperature sensor can play the role of temperature collection and correction, which can improve the accuracy of detecting temperature changes of key components during the operation of the high-voltage distribution box, and help to accurately control the working state of the high-voltage distribution box according to the temperature.

[0099] In the above embodiments, the aforementioned step S2 may also include the following steps: the first temperature sensor and the second temperature sensor are controlled by the BQ79731 chip to simultaneously collect the temperature of the temperature collection point on the high-voltage distribution box, the temperature collected by the first temperature sensor is the first temperature, and the temperature collected by the second temperature sensor is the second temperature. That is, the temperature of the temperature collection point is detected by using the BQ79731 chip.

[0100] Specifically, refer to Figure 6, taking the first temperature sensor 3 and the second temperature sensor 4 as an example, the high-voltage distribution box 11 also includes an intelligent sensor 6 (such as an intelligent current sensor), the first temperature sensor 3 and the second temperature sensor 4 are connected to the intelligent sensor 6, and the intelligent sensor 6 is developed based on the BQ79731 chip, which can not only realize real-time monitoring of the temperature, but also realize automatic temperature control of the high-voltage distribution box, and the control is fast. For example, when it is detected that the temperature is within the third preset temperature range of the above embodiment, more specifically, when the temperature reaches above 180°C, the intelligent sensor 6 can send a cut-off signal within 100 microseconds to quickly cut off the power to the high-voltage distribution box to prevent the temperature from further rising, so as to avoid more serious consequences, and help to further reduce safety risks.

[0101] Further, in the above embodiments, continue to refer to Figure 6 The high-voltage distribution box 11 may also include a pyroswitch 8, which is a control switch that can control the power off of the high-voltage distribution box 11. When the temperature is detected to be too high, the detected temperature information can first be transmitted to the battery management system BMS outside the high-voltage distribution box. The battery management system BMS determines whether to disconnect the switch of the high-voltage distribution box based on the temperature. The time required for the whole process needs to reach the millisecond level. The prior art is to trigger the switch of the high-voltage distribution box to disconnect by the battery management system BMS, and the response time is slow. The present invention combines the smart sensor 6, the BQ79731 chip and the pyroswitch 8. When the smart sensor 6 detects that the temperature is too high and the power needs to be cut off, it can directly trigger the pyroswitch 8 to disconnect, thereby quickly cutting off the pyroswitch 8, and the high-voltage distribution box is directly powered off. The response time is faster, which further enhances safety.

[0102] Second, refer to Figure 4 The embodiment of the present invention discloses a high-voltage distribution box control device 1, including a collection point determination module 11, a temperature detection module 12 and a judgment and control module 13.

[0103] The collection point determination module 11 is connected to the temperature detection module 12 , and the temperature detection module 12 is connected to the judgment and control module 13 .

[0104] Continue to refer Figure 4 The collection point determination module 11 is used to determine the temperature collection point of the high-voltage distribution box. The first temperature sensor and the second temperature sensor are arranged at the same temperature collection point.

[0105] The temperature detection module 12 is used for the first temperature sensor and the second temperature sensor to simultaneously collect the temperature of the temperature collection point on the high-voltage distribution box, the temperature collected by the first temperature sensor is the first temperature, and the temperature collected by the second temperature sensor is the second temperature. The first temperature sensor and the second temperature sensor are independent of each other.

[0106] The judgment and control module 13 is used to judge whether the consistency between the first temperature and the second temperature meets the preset conditions; if the preset conditions are met, the high-voltage distribution box is controlled to work or power off according to the first temperature and / or the second temperature; if the preset conditions are not met, there is a temperature information collection failure, and fault handling is performed.

[0107] By adopting the above technical scheme, the high-voltage distribution box control device 1 of the present invention sets two temperature sensors at the same temperature collection point, and measures the temperature of the same temperature collection point through the two temperature sensors, thereby improving the reliability and accuracy of temperature detection. It also solves the problem of excessive temperature of the high-voltage distribution box from the source of heat generation of the high-voltage distribution box by controlling whether the high-voltage distribution box is working or powered off according to the measured temperature, thereby meeting functional safety requirements.

[0108] Furthermore, the judgment and control module 13 is also used to execute the aforementioned steps S30, S301, S302, S311, S312, S313, S314, S315, S31S317 and S318.

[0109] The temperature detection module 12 is also used to determine that the first temperature is the actual temperature of the temperature collection point on the high-voltage distribution box; or determine that the second temperature is the actual temperature of the temperature collection point on the high-voltage distribution box; or determine that the average temperature of the first temperature and the second temperature is the actual temperature of the temperature collection point on the high-voltage distribution box. The temperature detection module 12 is also used to control the first temperature sensor and the second temperature sensor to simultaneously collect the temperature of the temperature collection point on the high-voltage distribution box through the BQ79731 chip, the temperature collected by the first temperature sensor is the first temperature, and the temperature collected by the second temperature sensor is the second temperature.

[0110] The collection point determination module 11 is further used to determine that there are two temperature collection points, which are located at the pole of the main positive relay and the pole of the main negative relay respectively.

[0111] Thirdly, reference Figure 5The embodiment of the present invention discloses an electronic device 2, including a processor 22 and a memory 21, wherein the memory 21 stores at least one instruction, and when the at least one instruction is executed by the processor 22, the high-voltage distribution box control method in any of the above embodiments is implemented. The memory 21 may include, for example, a system memory, a fixed non-volatile storage medium, etc. The system memory may store, for example, an operating system, an application program, a boot loader (BootLoader), and other programs.

[0112] By adopting the above technical solution, the electronic device 2 sets two temperature sensors at the same temperature collection point, and measures the temperature of the same temperature collection point through the two temperature sensors, thereby improving the reliability and accuracy of temperature detection. It also controls whether the high-voltage distribution box is working or powered off according to the measured temperature, thereby solving the problem of excessive temperature of the high-voltage distribution box from the source of heat generation of the high-voltage distribution box, and can meet functional safety requirements.

[0113] In a fourth aspect, an embodiment of the present invention discloses a computer-readable storage medium, in which at least one instruction is stored. When the at least one instruction is executed, the high-voltage distribution box control method in any of the aforementioned embodiments is implemented.

[0114] By adopting the above technical solution, the computer-readable storage medium sets two temperature sensors at the same temperature collection point, and measures the temperature of the same temperature collection point through the two temperature sensors, thereby improving the reliability and accuracy of temperature detection. It also solves the problem of excessive temperature of the high-voltage distribution box from the source of heat generation of the high-voltage distribution box by controlling whether the high-voltage distribution box is working or powered off according to the measured temperature, thereby meeting functional safety requirements.

[0115] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable non-transient storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0116] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0117] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0118] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0119] Although the present invention has been illustrated and described with reference to certain preferred embodiments of the present invention, it should be understood by those skilled in the art that the above is a further detailed description of the present invention in conjunction with specific embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. Those skilled in the art may make various changes in form and details, including making several simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. A high voltage distribution box control method, characterized in that: include: Determine the temperature collection point of the high-voltage distribution box; a first temperature sensor and a second temperature sensor are provided at the same temperature collection point; The first temperature sensor and the second temperature sensor simultaneously collect the temperature of the temperature collection point on the high-voltage distribution box, the temperature collected by the first temperature sensor is the first temperature, and the temperature collected by the second temperature sensor is the second temperature; wherein the first temperature sensor and the second temperature sensor are independent of each other; Determining whether the consistency between the first temperature and the second temperature meets a preset condition; If the preset condition is met, the high-voltage distribution box is controlled to operate or be powered off according to the first temperature and / or the second temperature; If the preset conditions are not met, there is a temperature information collection failure, and fault handling is performed.

2. The high voltage distribution box control method according to claim 1, characterized in that: The controlling the high-voltage power distribution box to operate or power off according to the first temperature and / or the second temperature specifically includes: Determine the actual temperature of the temperature collection point on the high-voltage distribution box according to the first temperature and / or the second temperature; Determine whether the actual temperature is within a first preset temperature range; wherein the first preset temperature range is determined according to a temperature range within which the high-voltage distribution box can maintain operation; If the actual temperature is within the first preset temperature range, the current output by the high-voltage distribution box is controlled to be reduced to a first limiting current when the high-voltage distribution box is in operation; If the actual temperature is not within the first preset temperature range, determine whether the actual temperature is within the second preset temperature range; wherein the second preset temperature range is determined according to the temperature range in which the high-voltage distribution box has a risk of overheating but can still recover autonomously; If the actual temperature is within the second preset temperature range, the current output by the high-voltage distribution box is controlled to be reduced to a second limiting current; the second limiting current is lower than the first limiting current; If the actual temperature is not within the second preset temperature range, determine whether the actual temperature is within a third preset temperature range; wherein the third preset temperature range is determined according to the temperature range in which the high-voltage distribution box has a risk of over-temperature damage; If the actual temperature is within the third preset temperature range, controlling the high-voltage distribution box to be powered off; If the actual temperature is not within the third preset temperature range, the high-voltage distribution box operates normally and outputs normal current.

3. The high voltage distribution box control method according to claim 2, characterized in that: Determining the actual temperature of the temperature collection point on the high-voltage distribution box according to the first temperature and / or the second temperature specifically includes: Determine that the first temperature is the actual temperature of the temperature collection point on the high-voltage distribution box; or determining that the second temperature is the actual temperature of the temperature collection point on the high-voltage distribution box; Or determine that the average temperature of the first temperature and the second temperature is the actual temperature of the temperature collection point on the high-voltage distribution box.

4. The high voltage distribution box control method according to claim 2, characterized in that: The first preset temperature range is 125°C≤T<150°C, and / or, the second preset temperature range is 150°C≤T<180°C, And / or, the third preset temperature range is 180°C≤T, and / or, the first limiting current is 0<I<50A, and / or, the second limiting current is 0A, And / or, the normal current is 150≤I≤200A.

5. The high voltage distribution box control method according to claim 1, characterized in that: The determining whether the consistency between the first temperature and the second temperature meets a preset condition specifically includes: Determining whether the difference between the first temperature and the second temperature is within a reasonable error range; If yes, determining whether the consistency between the first temperature and the second temperature satisfies the preset condition; If not, it is determined that the consistency between the first temperature and the second temperature does not satisfy the preset condition.

6. The high voltage distribution box control method according to claim 1, characterized in that: The high-voltage distribution box includes a main positive relay and a main negative relay, and determining the temperature collection point of the high-voltage distribution box specifically includes: It is determined that there are two temperature collection points, which are located at the pole of the main positive relay and the pole of the main negative relay respectively.

7. The high voltage distribution box control method according to claim 1, characterized in that: The first temperature sensor and the second temperature sensor simultaneously collect the temperature of the temperature collection point on the high-voltage distribution box, the temperature collected by the first temperature sensor is the first temperature, and the temperature collected by the second temperature sensor is the second temperature, specifically including: The first temperature sensor and the second temperature sensor are controlled by the BQ79731 chip to simultaneously collect the temperature of the temperature collection point on the high-voltage distribution box, the temperature collected by the first temperature sensor is the first temperature, and the temperature collected by the second temperature sensor is the second temperature.

8. A high voltage distribution box control device, characterized in that: include: A collection point determination module is used to determine the temperature collection point of the high-voltage distribution box; a first temperature sensor and a second temperature sensor are provided at the same temperature collection point; A temperature detection module, used for the first temperature sensor and the second temperature sensor to simultaneously collect the temperature of the temperature collection point on the high-voltage distribution box, the temperature collected by the first temperature sensor is the first temperature, and the temperature collected by the second temperature sensor is the second temperature; wherein the first temperature sensor and the second temperature sensor are independent of each other; The judgment and control module is used to judge whether the consistency between the first temperature and the second temperature meets the preset conditions; if the preset conditions are met, the high-voltage distribution box is controlled to work or power off according to the first temperature and / or the second temperature; if the preset conditions are not met, there is a temperature information collection failure, and fault handling is performed.

9. An electronic device, characterized in that: The electronic device includes a processor and a memory, wherein the memory stores at least one instruction, and when the at least one instruction is executed by the processor, the high-voltage distribution box control method according to any one of claims 1 to 7 is implemented.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores at least one instruction, and when the at least one instruction is executed, the high-voltage distribution box control method according to any one of claims 1 to 7 is implemented.

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