Battery box body detection method and related device

Abstract

The embodiment of the invention relates to the field of safety detection, and provides a battery box body detection device, which comprises a battery box body cover plate, box body side plates, a box body bottom plate, a position stroke sensor and a processing module, and is characterized in that the processing module is used for receiving a resistance value sent by the position stroke sensor; and determining first state information of the battery box body cover plate according to the resistance value, and if the state indicated by the first state information is a preset state, performing power-off processing on a battery pack arranged in the inner space of the travel of the battery box body cover plate and the box body side plate, and sending alarm information, state judgment can be performed according to the resistance value sent by the position travel sensor, and power-off processing is performed on the battery pack when the state is the preset state, so that the overall safety of the battery pack is improved.

Description

Technical Field

[0001] The present application relates to the field of safety detection technology, and in particular to a battery box detection method and related devices. Background Art

[0002] In the existing battery case detection scheme, whether thermal runaway or leakage occurs inside the battery case is usually detected, but the open or closed status of the battery case cover is not detected.

[0003] Since the prior art does not detect the open or closed status of the battery box cover, when the cover is opened while the battery pack is energized, there will be safety risks, which may easily cause safety accidents, resulting in the overall low safety of the battery pack. Summary of the invention

[0004] The embodiments of the present application provide a battery case detection method and related device, which can determine the state according to the resistance value sent by the position travel sensor, and cut off the power to the battery pack when the state is a preset state, thereby improving the overall safety of the battery pack.

[0005] A first aspect of an embodiment of the present application provides a battery box detection device, the device comprising: a battery box cover, a box side plate, a box bottom plate, a position travel sensor and a processing module, wherein the position travel sensor comprises a base and an ejector, the base is arranged on the box bottom plate in an inner space formed by the battery box cover and the box side plate, and the ejector contacts the battery box cover when the battery box cover is closed;

[0006] The processing module is connected to the position travel sensor, and the processing module is arranged inside the inner space formed by the battery box cover and the box side plate;

[0007] The position travel sensor is used to obtain the pressure value applied by the battery box cover through the ejector pin, convert the pressure value into a resistance value, and send the resistance value to the processing module;

[0008] The processing module is used to receive the resistance value sent by the position travel sensor, and determine the first status information of the battery box cover according to the resistance value. If the state indicated by the first status information is a preset state, the battery pack set in the inner space formed by the battery box cover and the box side panel is powered off and an alarm message is sent.

[0009] In this example, the position travel sensor obtains the pressure value applied by the battery case cover through the ejector pin, converts the pressure value into a resistance value, and sends the resistance value to the processing module. The processing module receives the resistance value sent by the position travel sensor, and determines the first state information of the battery case cover according to the resistance value. If the state indicated by the first state information is a preset state, the battery pack arranged in the inner space formed by the battery case cover and the case side panel is powered off, and an alarm message is sent. Therefore, the opening and closing state of the battery case cover can be judged according to the resistance value sent by the position travel sensor, and the battery pack is powered off when in the preset state, and an alarm message is sent, thereby improving the safety of the battery pack.

[0010] In a specific implementation, in determining the state information of the battery box cover according to the resistance value, the processing module is specifically used to:

[0011] Performing filtering on the resistance value to obtain a resistance value after filtering;

[0012] The status information of the battery box cover is determined according to the resistance value after the filtering process.

[0013] In a specific implementation, in filtering the resistance value to obtain the resistance value after filtering, the processing module is specifically used to:

[0014] The resistance value is filtered by using a sliding average filtering method to obtain a resistance value after filtering.

[0015] In a specific implementation, the battery box detection device further includes an infrared sensor, and the infrared sensor and the position travel sensor are arranged in parallel on the bottom plate of the box;

[0016] The infrared sensor is used to obtain the distance information between the battery box cover and the box bottom plate, and send the distance information to the processing module;

[0017] The processing module is used to receive the distance information sent by the infrared sensor, and perform correction processing on the first state information of the battery box cover according to the distance information to obtain the corrected first state information.

[0018] In a specific implementation, after powering off the battery pack disposed in the inner space defined by the battery box cover and the box side panels and sending the alarm information, the processing module is further configured to:

[0019] Continuously receiving the resistance values ​​sent by the position travel sensor within a preset time period to obtain a first resistance value set;

[0020] Constructing a resistance value change curve according to the first resistance value set and the corresponding receiving time point to obtain a first resistance value change curve;

[0021] Determining second state information of the battery box cover according to the first resistance value change curve;

[0022] The state of the battery pack is adjusted according to the second state information.

[0023] In a specific implementation, in determining the second state information of the battery box cover according to the first resistance value change curve, the processing module is specifically used to:

[0024] determining resistance value change information according to the first resistance value change curve;

[0025] Extracting the maximum resistance value change from the resistance value change information;

[0026] The second state information is determined according to the maximum resistance value change.

[0027] A second aspect of an embodiment of the present application provides a battery box detection method, which is applied to a battery box detection device, and the method includes:

[0028] receiving a resistance value sent by the position travel sensor;

[0029] Determine first state information of the battery box cover according to the resistance value;

[0030] If the state indicated by the first state information is a preset state, the battery pack arranged in the inner space formed by the battery box cover and the box side panels is powered off, and an alarm message is sent.

[0031] In a specific implementation, determining the state information of the battery box cover according to the resistance value includes:

[0032] Performing filtering on the resistance value to obtain a resistance value after filtering;

[0033] The status information of the battery box cover is determined according to the resistance value after the filtering process.

[0034] A third aspect of an embodiment of the present application provides a terminal, comprising a processor, an input device, an output device and a memory, wherein the processor, input device, output device and memory are interconnected, wherein the memory is used to store a computer program, the computer program comprises program instructions, and the processor is configured to call the program instructions to execute the step instructions in the first aspect of the embodiment of the present application.

[0035] The fourth aspect of the embodiments of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program for electronic data exchange, wherein the computer program enables a computer to execute part or all of the steps described in the first aspect of the embodiments of the present application.

[0036] A fifth aspect of the embodiments of the present application provides a computer program product, wherein the computer program product includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to cause a computer to execute some or all of the steps described in the first aspect of the embodiments of the present application. The computer program product may be a software installation package. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0038] Figure 1 A structural schematic diagram of a battery box detection device is provided for an embodiment of the present application;

[0039] Figure 2 A schematic diagram of the position of the ejector pin of the position travel sensor when the battery box cover is opened is provided for an embodiment of the present application;

[0040] Figure 3 A structural schematic diagram of another battery box detection device is provided for an embodiment of the present application;

[0041] Figure 4 A schematic diagram of the structure of a terminal provided in an embodiment of the present application. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0043] The terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices.

[0044] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0045] See also Figure 1 , Figure 1 The present invention provides a schematic diagram of a battery box detection device. Figure 1 As shown, the battery box detection device includes: a battery box cover 100, a box side plate 101, a box bottom plate 102, a position travel sensor and a processing module 5, wherein the position travel sensor includes a base 103 and an ejector pin 104, the base 103 is arranged on the box bottom plate 102 in the inner space formed by the battery box cover 100 and the box side plate 101, and the ejector pin 104 contacts the battery box cover 100 when the battery box cover 100 is closed;

[0046] The processing module 5 is connected to the position travel sensor, and the processing module 5 is arranged inside the inner space formed by the battery box cover 100 and the box side plate 101;

[0047] The position travel sensor is used to obtain the pressure value applied by the battery box cover 100 through the ejector pin 104, convert the pressure value into a resistance value, and send the resistance value to the processing module 5;

[0048] The processing module 5 is used to receive the resistance value sent by the position travel sensor, and determine the first state information of the battery box cover 100 according to the resistance value. If the state indicated by the first state information is a preset state, the battery pack arranged in the inner space formed by the battery box cover 100 and the box side panel 101 is powered off, and an alarm message is sent.

[0049] The ejector pin 104 of the position travel sensor can be extended and retracted up and down after being subjected to pressure, and outputs signals of different resistance values ​​according to different retracting and retracting strokes. Figure 1 As shown in FIG. 1 , the sensor ejector pin 104 is pressed and retracted by the cover plate.

[0050] like Figure 2 As shown, the battery box cover 100 is opened and the position of the ejector pin 104 of the position travel sensor, Figure 2 The ejector pin 104 of the middle position travel sensor exceeds the upper surface of the battery box side by a height H, and the ejector pin 104 is not compressed at this time.

[0051] In a specific implementation, in determining the state information of the battery box cover 100 according to the resistance value, the processing module 5 is specifically used to:

[0052] A1, filtering the resistance value to obtain a resistance value after filtering;

[0053] A2. Determine the status information of the battery box cover 100 according to the resistance value after filtering.

[0054] The resistance value may be filtered by a sliding average filtering method to obtain a resistance value after filtering.

[0055] Of course, the resistance value may also be filtered by using methods such as arithmetic mean filtering and median filtering to obtain the resistance value after filtering.

[0056] Compare the resistance value after filtering with the preset resistance value. If the resistance value is less than the preset resistance value, determine that the state of the battery box cover 100 is the first state, and the state information is that the battery box cover 100 is in the closed state;

[0057] If it is greater than the preset resistance value, it is determined that the state of the battery box cover 100 is the second state, and the state information is that the battery box cover 100 is in the open state. The preset resistance value is set by empirical value or historical data. For example, if the resistance value is 500000Ω after the cover is opened and 1000Ω after the cover is closed, the set value 1 can be 2000Ω. This is only for example and is not specifically limited.

[0058] In a specific implementation, Figure 3 As shown, the battery box detection device further includes an infrared sensor 6, and the infrared sensor 6 and the position travel sensor are arranged in parallel on the box bottom plate 102;

[0059] The infrared sensor 6 is used to obtain the distance information between the battery box cover 100 and the box bottom plate 102, and send the distance information to the processing module 5;

[0060] The processing module 5 is used to receive the distance information sent by the infrared sensor 6, and perform correction processing on the first state information of the battery box cover 100 according to the distance information to obtain the corrected first state information.

[0061] Among them, the method for correcting the first state information to obtain the corrected first state information can be: obtaining a conversion matrix between the distance value and the resistance value, converting the distance information into a resistance value according to the conversion matrix, and obtaining a first resistance value; generating state correction information according to the first resistance value; and correcting the first state information using the state correction information to obtain the corrected first state information.

[0062] The conversion matrix can be determined according to the above two sets of information by obtaining the distance and corresponding resistance value of the battery box cover 100 when it is closed, and the resistance value at a certain distance when it is opened. The mapping relationship matrix between the distance and the resistance value can be solved by linear conversion. The first resistance value and the resistance value collected by the position travel sensor can be averaged to obtain the resistance value average, and the state correction information can be determined according to the resistance value average. The state correction information can be determined by extracting the offset between the resistance value average and the resistance value collected by the position travel sensor. Specifically, it can be understood that the resistance value collected by the position travel sensor is finally offset according to the offset to obtain the resistance value average, and the state information corresponding to the resistance value average is determined as the first state information after correction. Thereby, the accuracy of the overall state determination can be improved.

[0063] In a specific implementation, after powering off the battery pack disposed in the inner space defined by the battery box cover 100 and the box side plate 101 and sending the alarm information, the processing module 5 is further used to:

[0064] B1. Continuously receiving the resistance values ​​sent by the position travel sensor within a preset time period to obtain a first resistance value set;

[0065] B2. constructing a resistance value change curve according to the first resistance value set and the corresponding receiving time point to obtain a first resistance value change curve;

[0066] B3, determining the second state information of the battery box cover 100 according to the first resistance value change curve;

[0067] B4. Adjust the state of the battery pack according to the second state information.

[0068] The preset time period may be a continuous time interval after the alarm information is issued. The length of the event interval may be set by empirical values ​​or historical data. Within the preset time period, the resistance values ​​are continuously received to obtain the first resistance value set.

[0069] A discrete resistance change curve is constructed according to the received first resistance value and the corresponding receiving time point. After the discrete change curve is successfully constructed, the discrete points are smoothly connected to obtain the first resistance value change curve.

[0070] When it is detected that the battery box cover 100 is not in a closed state, it may be because after the last test and inspection of the battery pack, there may be a situation of re-inspection after the inspection, so it is necessary to temporarily cover the battery box cover 100 to facilitate subsequent more convenient processing. At this time, the battery pack is in a discharge state and needs to be continuously discharged. If the battery pack is continuously powered off at this time, it will cause abnormalities in subsequent tests. Therefore, the above state can be identified according to the first resistance value change curve. The resistance value change information can be determined according to the first resistance value change curve, and the second state information can be determined by extracting the maximum resistance value change from the resistance value change information.

[0071] After determining the second state information, the state of the battery pack is adjusted. If the second state information indicates that the battery pack described in the above embodiment is in a discharging state and needs to be continuously discharged, the battery pack can be opened to enable it to be in a discharging state. At this time, it is also necessary to determine whether to open the battery pack based on other relevant auxiliary information, for example, to detect the load state of the battery pack. If the load state is a power-using state, the battery pack can be opened. If the load state of the battery pack is a closed state, the battery pack can continue to be closed at this time.

[0072] In a specific implementation, in determining the second state information of the battery box cover 100 according to the first resistance value change curve, the processing module 5 is specifically used for:

[0073] C1. determining resistance value change information according to the first resistance value change curve;

[0074] C2. extracting the maximum resistance value change from the resistance value change information;

[0075] C3. Determine the second state information according to the maximum resistance value change.

[0076] The resistance change value information (characterized by the resistance change value) may be determined according to the jump point in the first resistance change curve.

[0077] The degree of opening and closing of the battery box cover 100 can be determined according to the maximum resistance value change. The greater the maximum resistance value change, the greater the degree of opening and closing of the battery box cover 100. The smaller the maximum resistance value change, the smaller the degree of opening and closing of the battery box cover 100. At this time, the battery pack may be in a discharge state. If continuous discharge is required, the battery pack can be opened to enable it to be in a discharge state to indicate specific second state information. If the change is large, the second state information may be the first state information, and the battery pack is continuously closed at this time.

[0078] In this example, the second state information can be determined according to the resistance value change information determined by the first resistance value change curve, thereby improving the accuracy of determining the second state information.

[0079] For the above embodiments, please refer to Figure 4 , Figure 4 A schematic diagram of the structure of a terminal provided in an embodiment of the present application, as shown in the figure, includes a processor, an input device, an output device and a memory, the processor, the input device, the output device and the memory are interconnected, wherein the memory is used to store a computer program, the computer program includes program instructions, the processor is configured to call the program instructions, and the program includes instructions for executing the following steps;

[0080] receiving a resistance value sent by the position travel sensor;

[0081] Determine first state information of the battery box cover 100 according to the resistance value;

[0082] If the state indicated by the first state information is a preset state, the battery pack arranged in the inner space formed by the battery box cover 100 and the box side plate 101 is powered off, and an alarm message is sent.

[0083] An embodiment of the present application also provides a computer storage medium, wherein the computer storage medium stores a computer program for electronic data exchange, and the computer program enables a computer to execute part or all of the steps of any battery case detection method recorded in the above method embodiments.

[0084] An embodiment of the present application also provides a computer program product, which includes a non-transitory computer-readable storage medium storing a computer program, and the computer program enables a computer to execute part or all of the steps of any battery case detection method recorded in the above method embodiments.

[0085] It should be noted that, for the aforementioned method embodiments, for the sake of simplicity, they are all expressed as a series of action combinations, but those skilled in the art should be aware that the present application is not limited by the described order of actions, because according to the present application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present application.

[0086] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0087] The embodiments of the present application are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. At the same time, for general technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A battery box detection device, characterized in that: The device comprises: a battery box cover, a box side plate, a box bottom plate, a position travel sensor and a processing module, wherein the position travel sensor comprises a base and an ejector, the base is arranged on the box bottom plate in the inner space formed by the battery box cover and the box side plate, and the ejector contacts the battery box cover when the battery box cover is closed; The processing module is connected to the position travel sensor, and the processing module is arranged inside the inner space formed by the battery box cover and the box side plate; The position travel sensor is used to obtain the pressure value applied by the battery box cover through the ejector pin, convert the pressure value into a resistance value, and send the resistance value to the processing module; The processing module is used to receive the resistance value sent by the position travel sensor, and determine the first status information of the battery box cover according to the resistance value. If the state indicated by the first status information is a preset state, the battery pack set in the inner space formed by the battery box cover and the box side panel is powered off and an alarm message is sent.

2. The battery box detection device according to claim 1, characterized in that: In determining the status information of the battery box cover according to the resistance value, the processing module is specifically used for: Performing filtering on the resistance value to obtain a resistance value after filtering; The status information of the battery box cover is determined according to the resistance value after the filtering process.

3. The battery box detection device according to claim 2, characterized in that: In terms of filtering the resistance value to obtain the resistance value after filtering, the processing module is specifically used for: The resistance value is filtered by using a sliding average filtering method to obtain a resistance value after filtering.

4. The battery box detection device according to any one of claims 1 to 3, characterized in that: The battery box detection device also includes an infrared sensor, which is arranged in parallel with the position travel sensor on the box bottom plate; The infrared sensor is used to obtain the distance information between the battery box cover and the box bottom plate, and send the distance information to the processing module; The processing module is used to receive the distance information sent by the infrared sensor, and perform correction processing on the first state information of the battery box cover according to the distance information to obtain the corrected first state information.

5. The battery box detection device according to claim 4, characterized in that: After powering off the battery pack disposed in the inner space formed by the battery box cover and the box side panels and sending the alarm information, the processing module is further used to: Continuously receiving the resistance values ​​sent by the position travel sensor within a preset time period to obtain a first resistance value set; Constructing a resistance value change curve according to the first resistance value set and the corresponding receiving time point to obtain a first resistance value change curve; Determining second state information of the battery box cover according to the first resistance value change curve; The state of the battery pack is adjusted according to the second state information.

6. The battery box detection device according to claim 5, characterized in that: In determining the second state information of the battery box cover according to the first resistance value change curve, the processing module is specifically used for: determining resistance value change information according to the first resistance value change curve; Extracting the maximum resistance value change from the resistance value change information; The second state information is determined according to the maximum resistance value change.

7. A battery box detection method, characterized in that: Applied to a battery box detection device, the method comprises: receiving a resistance value sent by the position travel sensor; Determine first state information of the battery box cover according to the resistance value; If the state indicated by the first state information is a preset state, the battery pack arranged in the inner space formed by the battery box cover and the box side panels is powered off, and an alarm message is sent.

8. The battery box detection method according to claim 7, characterized in that: The determining the state information of the battery box cover according to the resistance value includes: Performing filtering on the resistance value to obtain a resistance value after filtering; The status information of the battery box cover is determined according to the resistance value after the filtering process.

9. A terminal, characterized in that: The method comprises a processor, an input device, an output device and a memory, wherein the processor, the input device, the output device and the memory are interconnected, wherein the memory is used to store a computer program, the computer program comprises program instructions, and the processor is configured to call the program instructions to execute the method as claimed in claim 7 or 8.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, which includes program instructions. When the program instructions are executed by a processor, the processor is caused to perform the method according to claim 7 or 8.

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