Negative pressure formation channel blockage detection method and device and computer equipment

Abstract

The invention relates to a negative pressure formation channel blockage detection method and device and computer equipment. The method comprises the steps that the liquid loss amount of negative pressure formation of a detection battery is obtained, and a negative pressure formation channel corresponding to the detection battery is obtained; and comparing the liquid loss amount of the detected battery with the reference level of the liquid loss amount of the negative pressure formation channel corresponding to the detected battery, and judging whether the negative pressure formation channel corresponding to the detected battery is blocked or not. The blockage state of the negative pressure formation channel is identified through the liquid loss amount of the battery, so that the situation that the whole judgment error is caused by the part of batteries with large liquid loss amount is effectively avoided, the control over the liquid loss amount is improved, blockage of any degree can be identified, the quality of the battery is ensured, and the safety of the battery is improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a method, device and computer equipment for detecting blockage of a negative pressure formation channel. Background Art

[0002] With the development of battery manufacturing technology, negative pressure formation technology has emerged. By performing battery formation under negative pressure conditions, the gas generation inside the battery can be effectively reduced, thereby improving the performance and life of the battery. Negative pressure formation technology has the characteristics of uniform formation, high battery consistency and reduced side reactions, and has gradually become an important process in the field of battery manufacturing.

[0003] However, if the negative pressure pipeline is blocked, the gas may not be discharged normally, thus affecting the normal charge and discharge process of the battery during formation. The accumulation of gas in the battery may cause changes in the battery expansion pressure, thereby affecting the contact of the internal components of the battery, increasing the internal resistance, and causing capacity decay and cycle performance degradation.

[0004] In traditional technology, the negative pressure formation blockage detection method (i.e., the method of detecting whether the negative pressure pipeline is blocked) mainly uses detection equipment (negative pressure detection device or formation negative pressure blockage detection tooling) to collect the current negative pressure value from the press machine using formation blockage detection software, and judge the blockage status according to the negative pressure value; however, this type of negative pressure formation blockage detection method can only detect the blockage of the main pipeline in the negative pressure formation equipment. Since there are many negative pressure formation channels in the negative pressure formation equipment, when only individual negative pressure formation channels are blocked, the impact on the negative pressure value of the main pipeline is not significant. Therefore, it is impossible to accurately judge the situation where only individual negative pressure formation channels are blocked, and this type of blockage detection method may also It causes a certain pressure loss to the pipeline or equipment, so when using it, you also need to pay attention to controlling the size and time of the negative pressure. The testing method is relatively cumbersome and has high requirements on equipment performance. In addition, there is also a method of measuring whether the negative pressure formation channel is blocked by using a liquid level sensor to identify the liquid level change of the electrolyte sucked out of the negative pressure nozzle. However, the use of a liquid level reactor for identification has high requirements on equipment, and it is necessary to improve the commonly used equipment. A liquid storage tank and a liquid level sensor are set in each channel to determine the blockage of each channel. The amount of electrolyte in the liquid storage tank is a changing process, and it is necessary to monitor the liquid level changes in the entire negative pressure formation process in real time, which is cumbersome to operate. Summary of the invention

[0005] Based on this, it is necessary to provide a negative pressure forming channel blockage detection method, device and computer equipment that can identify whether there is a negative pressure forming channel blockage in the negative pressure forming equipment and is simple to operate in order to solve the above technical problems.

[0006] In a first aspect, the present application provides a method for detecting blockage of a negative pressure formation channel, the method comprising:

[0007] Obtain the amount of liquid loss during negative pressure formation of the test battery, and obtain the negative pressure formation channel corresponding to the test battery;

[0008] The fluid loss of the detection battery is compared with a reference level of the fluid loss of the negative pressure formation channel corresponding to the detection battery to determine whether the negative pressure formation channel corresponding to the detection battery is blocked.

[0009] In one embodiment, before obtaining the amount of liquid loss during negative pressure formation of the detection battery and the negative pressure formation channel corresponding to the detection battery, the method includes:

[0010] Collect sample data of the negative pressure formation liquid loss of sample batteries in each negative pressure formation channel, and obtain the mean value and standard deviation of the liquid loss in each negative pressure formation channel based on the sample data;

[0011] The sum of the mean and the standard deviation is taken as the baseline level of fluid loss in each negative pressure formation channel.

[0012] In one embodiment, obtaining the amount of liquid loss caused by negative pressure formation of the detection battery includes:

[0013] Obtain the weight of the test battery after the first injection and the weight of the test battery before the second injection;

[0014] The amount of liquid loss in the test battery is obtained according to the difference between the weight of the test battery after the first liquid injection and the weight of the test battery before the second liquid injection.

[0015] In one embodiment, obtaining the negative pressure formation channel corresponding to the detection battery includes:

[0016] An identification code of the detection battery is obtained, and a negative pressure formation channel corresponding to the detection battery is obtained according to the identification code of the detection battery.

[0017] In one embodiment, comparing the amount of liquid loss of the detection battery with a reference level of the amount of liquid loss of the negative pressure formation channel corresponding to the detection battery to determine whether the negative pressure formation channel corresponding to the detection battery is blocked includes:

[0018] It is determined whether the battery liquid loss of the negative pressure formation of the test battery is greater than 0; if the battery liquid loss is not greater than 0, it is directly determined that the negative pressure formation channel corresponding to the test battery is in a blocked state.

[0019] In one embodiment, when obtaining the amount of liquid loss during negative pressure formation of the detection battery and obtaining the negative pressure formation channel corresponding to the detection battery, there are multiple detection batteries, and each negative pressure formation channel corresponds to multiple detection batteries;

[0020] The method comprises comparing the liquid loss amount of the test battery with the reference level of the liquid loss amount of the negative pressure formation channel corresponding to the test battery to determine whether the negative pressure formation channel corresponding to the test battery is blocked:

[0021] Determine whether the battery fluid loss of multiple detection batteries negatively pressurized is greater than 0; if the fluid loss of n consecutive detection batteries among the multiple detection batteries corresponding to the same negative pressure formation channel is not greater than 0, then directly determine that the negative pressure formation channel is in a blocked state, wherein n is a positive integer not less than 2.

[0022] In one embodiment, when obtaining the amount of liquid loss during negative pressure formation of the detection battery and obtaining the negative pressure formation channel corresponding to the detection battery, there are multiple detection batteries, and each negative pressure formation channel corresponds to multiple detection batteries;

[0023] Comparing the liquid loss amount of the test battery with the reference level of the liquid loss amount of the negative pressure formation channel corresponding to the test battery to determine whether the negative pressure formation channel corresponding to the test battery is blocked includes:

[0024] The liquid loss of each detection battery is compared with the baseline level of the liquid loss of the negative pressure formation channel corresponding to each detection battery. If the liquid loss of n consecutive detection batteries among multiple detection batteries corresponding to the same negative pressure formation channel is greater than the baseline level, the blockage state of the negative pressure formation channel is judged to be blockage, where n is a positive integer not less than 2.

[0025] In one embodiment, before obtaining and detecting the amount of liquid loss caused by negative pressure formation of the battery, the method includes:

[0026] Determine whether the capacity of the negative pressure collection cup in the negative pressure formation channel is greater than a threshold value, and if the capacity of the negative pressure collection cup is greater than the threshold value, obtain the liquid loss amount of the negative pressure formation of the detection battery;

[0027] And / or, determining whether there is electrolyte on the surface of the detection battery after negative pressure formation, if there is no electrolyte on the surface of the detection battery after negative pressure formation, obtaining the amount of liquid lost by negative pressure formation of the detection battery.

[0028] In a second aspect, the present application also provides a negative pressure formation channel blockage detection device. The device comprises:

[0029] An acquisition module is used to detect the amount of liquid loss during negative pressure formation of the battery and obtain the negative pressure formation channel corresponding to the detected battery;

[0030] The blockage judgment module is used to compare the liquid loss of the detection battery with the reference level of the liquid loss of the negative pressure formation channel corresponding to the detection battery, and judge whether the negative pressure formation channel corresponding to the detection battery is blocked.

[0031] In a third aspect, the present application further provides a computer device. The computer device includes a memory and a processor, the memory stores a computer program, and the processor implements the following steps when executing the computer program:

[0032] Obtain the amount of liquid loss during negative pressure formation of the test battery, and obtain the negative pressure formation channel corresponding to the test battery;

[0033] The fluid loss of the detection battery is compared with a reference level of the fluid loss of the negative pressure formation channel corresponding to the detection battery to determine whether the negative pressure formation channel corresponding to the detection battery is blocked.

[0034] The above-mentioned negative pressure formation channel blockage detection method, device and computer equipment judge the blockage condition of the negative pressure formation channel by comparing the amount of liquid loss of the battery during the negative pressure formation process with the baseline level of the negative pressure formation channel where the battery is located, thereby solving the problem that it is difficult to identify the blockage of individual negative pressure formation channels. The operation is simple and there is no need to improve the negative pressure equipment. The blockage condition of each negative pressure formation channel can be accurately identified, so that the blocked negative pressure formation channel can be cleaned in time, thereby ensuring the formation effect of the battery and improving the consistency and quality of battery products. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] FIG1 is a diagram showing an application environment of a method for detecting blockage of a negative pressure forming channel according to an embodiment;

[0036] FIG2 is a schematic flow diagram of a method for detecting blockage of a negative pressure formation channel in one embodiment;

[0037] FIG3 is a schematic flow chart of a method for detecting blockage of a negative pressure formation channel in another embodiment;

[0038] FIG4 is a block diagram of a negative pressure forming channel blockage detection device in one embodiment;

[0039] FIG. 5 is a diagram showing the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0041] The negative pressure formation blockage detection method provided in the embodiment of the present application can be applied to the application environment as shown in Figure 1. Among them, the terminal 102 communicates with the server 104 through the network. The data storage system can store the data that the server 104 needs to process. The data storage system can be integrated on the server 104, or it can be placed on the cloud or other network servers. Among them, the terminal 102 can be but is not limited to various personal computers, laptops, smart phones, tablets, Internet of Things devices and portable wearable devices. The Internet of Things devices can be smart speakers, smart TVs, smart air conditioners, smart car-mounted devices, etc. Portable wearable devices can be smart watches, smart bracelets, head-mounted devices, etc. The server 104 can be implemented with an independent server or a server cluster consisting of multiple servers.

[0042] In one embodiment, as shown in FIG. 2 , a negative pressure formation blockage detection method is provided, and the method is applied to the server in FIG. 1 as an example for description, including the following steps:

[0043] Step 202, obtaining the amount of liquid loss during negative pressure formation of the test battery, and obtaining the negative pressure formation channel corresponding to the test battery.

[0044] Step 204 , comparing the fluid loss of the test battery with a reference level of the fluid loss of the negative pressure formation channel corresponding to the test battery, to determine whether the negative pressure formation channel corresponding to the test battery is blocked.

[0045] Among them, negative pressure formation refers to charging and discharging the battery under negative pressure. During this process, a series of chemical reactions will occur in the electrode materials, such as the decomposition of the electrolyte, the formation of the solid electrolyte interface (SEI), etc. The amount of fluid loss refers to the amount of electrolyte lost during the formation process of the battery, that is, the difference between the mass of the electrolyte before the battery is formed and the mass of the electrolyte after the battery is formed.

[0046] Negative pressure formation channel refers to the equipment or path used to provide negative pressure environment during the negative pressure formation process of the battery. Negative pressure formation channel includes pipelines, equipment, or systems related to the negative pressure environment to ensure that appropriate negative pressure can be maintained during the battery formation process. The smoothness of the channel directly affects the formation effect. If the channel is blocked, the gas or liquid will not flow normally, which may affect the battery performance.

[0047] The reference level of fluid loss refers to a standard or reference value of fluid loss during the negative pressure formation process of the battery, which is used to evaluate and judge whether the fluid loss of the tested battery is within the normal range. And because the temperature and negative pressure value of each negative pressure formation channel in the negative pressure formation equipment are not exactly the same, and the temperature and negative pressure value will affect the fluid loss of the battery, each negative pressure formation channel will correspond to a reference level of fluid loss.

[0048] In the above-mentioned negative pressure formation channel blockage detection method, the blockage of the negative pressure formation channel is determined by comparing the amount of fluid loss of the test battery during the negative pressure formation process with the reference level of the amount of fluid loss of the negative pressure formation channel where the test battery is located. For example, if the amount of fluid loss of the test battery is greater than the reference level, the corresponding negative pressure formation channel is in a blocked state, and if the amount of fluid loss of the test battery is not greater than the reference level, the corresponding negative pressure formation channel is in a normal state (i.e., not blocked). This solves the problem of difficulty in identifying blockage of individual negative pressure formation channels, and the operation is simple, without the need to improve the negative pressure equipment, and the blockage of each negative pressure formation channel can be accurately identified, so that the blocked negative pressure formation channel can be cleaned in time, ensuring the formation effect of the battery and improving the consistency and quality of battery products.

[0049] It is particularly noted that during the negative pressure formation process, the negative pressure formation equipment extracts the gas generated during the battery formation process from the battery's liquid injection port. During this process, a portion of the electrolyte in the battery will be drawn into the negative pressure collection cup along with the generated gas, and then the electrolyte will be re-injected into the battery by filling the negative pressure collection cup with dry gas through the positive pressure dry gas system. If the negative pressure formation channel is blocked, the electrolyte in the negative pressure collection cup will not be able to flow back to the battery smoothly, resulting in an increase in the amount of fluid loss in the battery. Therefore, the inventor of the present application has found that it is possible to determine whether the negative pressure formation channel is blocked by the amount of fluid loss of the battery during the negative pressure formation process. And usually each battery corresponds to a negative pressure formation channel, and the blockage of the corresponding single negative pressure formation channel can be determined by the amount of fluid loss of the battery.

[0050] In one embodiment, before obtaining the amount of fluid loss during negative pressure formation of a test battery and the negative pressure formation channel corresponding to the test battery, sample data of the amount of fluid loss during negative pressure formation of sample batteries in each negative pressure formation channel are collected, and based on the sample data, a mean value of the amount of fluid loss and a standard deviation of the amount of fluid loss in each negative pressure formation channel are obtained; and the sum of the mean value and the standard deviation is used as a benchmark level for the amount of fluid loss in each negative pressure formation channel.

[0051] Among them, the negative pressure formation process of the sample battery is carried out when the negative pressure formation channel is not blocked, for example, the negative pressure formation channel is cleaned before sample data collection, or sample data collection is carried out after confirming that the negative pressure formation channel is not blocked through conventional detection methods.

[0052] Specifically, a certain amount of sample batteries are selected, and under the same negative pressure formation conditions as the test battery, after the charge and discharge cycle is completed, the fluid loss of each sample battery is collected to obtain sample data of the fluid loss of the sample battery during negative pressure formation, and the mean value of the battery fluid loss and the standard deviation of the battery fluid loss are obtained based on the fluid loss of the sample battery; the sum of the mean value of the fluid loss and the standard deviation of the fluid loss is used as the benchmark level of the battery fluid loss. Before the negative pressure formation operation of the sample battery, the negative pressure formation channel connected to the sample battery is recorded, that is, when the fluid loss of the sample battery is collected, the fluid loss of the sample battery can be made to correspond to the negative pressure formation channel one by one, thereby obtaining the benchmark level of the fluid loss corresponding to each negative pressure formation channel.

[0053] Exemplarily, the fluid loss data of all sample batteries are summarized, and the mean μ and standard deviation σ of the fluid loss are calculated. The expression of the baseline level is shown as follows: baseline level = μ+σ. Specifically, after statistical calculation, the mean μ of the battery fluid loss is 2g, and the standard deviation σ of the battery fluid loss is 1g. Then 3g is the baseline level of the battery fluid loss, that is, the upper limit of the battery fluid loss is 3g. When the battery fluid loss exceeds 3g, the negative pressure formation channel is in a blocked state. Furthermore, the blockage state can be further subdivided into mild blockage, moderate blockage and severe blockage. For example, μ+σ<fluid loss ≤μ+2σ is mild blockage, μ+2σ<fluid loss ≤μ+3σ is moderate blockage, and μ+3σ<fluid loss is severe blockage.

[0054] It can be understood that the sample battery and the test battery should use batteries of the same batch model, and the negative pressure formation conditions of the test battery and the sample battery should also be the same, so as to ensure the accuracy of the judgment result; the sample battery is used to obtain the benchmark level of battery fluid loss; the test battery includes multiple batteries, and the blockage status of multiple negative pressure formation channels can be detected at the same time.

[0055] In this embodiment, an accurate and reliable baseline level of battery fluid loss is provided through the collection and statistical analysis of a large sample of fluid loss data. When a test battery with a fluid loss exceeding the baseline level is found, the blockage of the negative pressure formation channel can be effectively identified, and the blocked negative pressure formation channel can be processed in time, thereby reducing the situation of poor battery performance caused by channel blockage.

[0056] In one embodiment, obtaining the amount of liquid loss caused by negative pressure formation of the test battery includes obtaining the weight of the test battery after the first liquid injection and the weight of the test battery before the second liquid injection; and obtaining the amount of liquid loss of the test battery based on the difference between the weight of the test battery after the first liquid injection and the weight of the test battery before the second liquid injection.

[0057] Specifically, in the manufacturing process of the battery, before the negative pressure formation, the battery will be injected for the first time. Since there will be loss of electrolyte in the formation process, the second injection will be performed after the formation is completed. In order to determine the injection amount of the second injection, the battery will be weighed after the first injection and before the second injection. Although the transfer of the battery will be involved in the formation and the first injection or the second injection, the injection port will be blocked during the transfer process, so there will be basically no loss of electrolyte during the transfer process. Therefore, the loss of electrolyte in the negative pressure formation of the battery can be calculated by the difference between the weight of the battery after the first injection and the weight before the second injection, and the existing data of the battery manufacturing process is used, without adding new process steps, and the operation is simple. Of course, in other embodiments, the detection battery can also be weighed before the formation, and the detection battery can also be weighed after the formation, and the difference between the two weights is used as the loss of electrolyte.

[0058] In one embodiment, acquiring the negative pressure formation channel corresponding to the detection battery includes acquiring an identification code of the detection battery, and acquiring the negative pressure formation channel corresponding to the detection battery according to the identification code of the detection battery.

[0059] The identification code of the test battery is a code or mark used to uniquely identify the battery. It can be numbers, letters or a QR code, etc., to distinguish and track the identity information of each battery. During the production and testing process, the identification code of the test battery is used to manage and monitor the specific conditions of each test battery.

[0060] Specifically, during the negative pressure formation process, the battery identification code can be used to trace the relevant information of the battery, and the identification code can be matched with the negative pressure formation channel corresponding to the battery, so as to facilitate monitoring and detecting the negative pressure formation process of the battery and detecting the negative pressure formation channel in which the battery is located.

[0061] In this embodiment, the negative pressure formation channel where the detection cell is located is quickly obtained through the battery identification code, so that the correspondence between the detection cell and the negative pressure formation channel can be obtained, and then the blocked negative pressure formation channel can be quickly traced and cleaned, thereby improving the detection speed and cleaning speed of the abnormal negative pressure formation channel.

[0062] In one embodiment, before obtaining the amount of fluid loss due to negative pressure formation of the detection battery, it includes determining whether the capacity of the negative pressure collection cup in the negative pressure formation channel is greater than a threshold value, if the capacity of the negative pressure collection cup is greater than the threshold value, obtaining the amount of fluid loss due to negative pressure formation of the detection battery; and / or, determining whether there is electrolyte on the surface of the detection battery after negative pressure formation, if there is no electrolyte on the surface of the detection battery after negative pressure formation, obtaining the amount of fluid loss due to negative pressure formation of the detection battery.

[0063] Among them, the negative pressure collection cup is a container for collecting electrolyte that escapes from the battery during the negative pressure formation process. Specifically, during the negative pressure formation process, the electrolyte will escape into the negative pressure collection cup. If the capacity of the negative pressure collection cup is insufficient, the electrolyte will be directly drawn away by the negative pressure and overflow, resulting in an increase in the amount of liquid loss. In order to avoid erroneous judgments caused by insufficient capacity of the collection cup, before obtaining the amount of liquid loss of the battery, first determine whether the capacity of the negative pressure collection cup has exceeded a preset threshold.

[0064] In addition, during the negative pressure formation process of the battery, the electrolyte may directly emerge from the inside of the battery and partially remain on the surface of the battery. The direct emergence of the electrolyte will also lead to an increase in the amount of fluid loss, which will lead to a misjudgment of the blockage of the negative pressure formation channel. Therefore, if there is electrolyte on the surface of the test battery after negative pressure formation, it is not appropriate to judge the blockage of the negative pressure formation channel based on the amount of fluid loss of the test battery cell, which is easy to cause misjudgment.

[0065] In this embodiment, by judging whether the capacity of the negative pressure collection cup exceeds the set threshold or whether there is electrolyte on the surface of the detection battery after negative pressure formation before obtaining the battery fluid loss amount, it can effectively avoid the accuracy of judging whether the negative pressure formation channel is blocked by the fluid loss amount due to the electrolyte overflowing from the negative pressure collection cup or the battery.

[0066] In one embodiment, the liquid loss amount of the detection battery is compared with the baseline level of the liquid loss amount of the negative pressure formation channel corresponding to the detection battery, and before determining whether the negative pressure formation channel corresponding to the detection battery is blocked, the process includes: determining whether the liquid loss amount of the negative pressure formation battery of the detection battery is greater than 0; if the liquid loss amount of the detection battery is not greater than 0, directly determining that the negative pressure formation channel corresponding to the detection battery is in a blocked state.

[0067] Specifically, during the negative pressure formation process of the battery, the battery usually loses electrolyte, that is, the amount of liquid loss is usually greater than 0. However, if the negative pressure formation channel corresponding to the test battery is in a completely blocked state, the electrolyte of the test battery cannot be discharged, and part of the blockage in the negative pressure formation channel may fall back into the battery, resulting in the amount of liquid loss obtained being not less than 0. Therefore, if the amount of battery liquid loss of the negative pressure formation of the test battery is not greater than 0, it can be directly determined that the negative pressure formation channel corresponding to the test battery is in a blocked state.

[0068] In this embodiment, by first determining whether the amount of liquid loss of the detection battery is greater than 0, the state of the negative pressure formation channel can be determined more quickly and effectively, thereby reducing unnecessary comparison steps and improving detection efficiency.

[0069] In one embodiment, when obtaining the amount of fluid lost by negative pressure formation of a detection battery and obtaining the negative pressure formation channel corresponding to the detection battery, there are multiple detection batteries, and each negative pressure formation channel corresponds to multiple detection batteries; before comparing the amount of fluid lost by the detection battery with a reference level of the amount of fluid lost by the negative pressure formation channel corresponding to the detection battery, and determining whether the negative pressure formation channel corresponding to the detection battery is blocked, the method includes: determining whether the amount of fluid lost by negative pressure formation of multiple detection batteries is greater than 0; if the amount of fluid lost by n consecutive detection batteries among the multiple detection batteries corresponding to the same negative pressure formation channel is not greater than 0, directly determining that the negative pressure formation channel is in a blocked state, wherein n is a positive integer greater than or equal to 2.

[0070] Specifically, n=2 is used as an example to illustrate that before comparing the amount of fluid loss of the negative pressure formation channel with the reference level, it is determined whether the amount of fluid loss of the battery after the negative pressure formation of the test battery is greater than 0. If the amount of fluid loss of the test battery corresponding to the negative pressure formation channel is not greater than 0, it is considered that the negative pressure formation channel may be completely blocked, and the negative pressure formation channel is marked. And the negative pressure formation operation is performed on the next test battery through the negative pressure formation channel to obtain the amount of fluid loss of the test battery. If the amount of fluid loss of the test battery is still not greater than 0, it is determined that the negative pressure formation channel is completely blocked, that is, the electrolyte generated after the negative pressure formation operation of the test battery cannot be discharged. If the amount of fluid loss of the test battery is greater than 0, it is considered that the negative pressure formation channel is not completely blocked. By using multiple test batteries to determine whether the negative pressure formation channel is completely blocked, the accuracy of the judgment can be improved to avoid misjudgment caused by a single abnormality. It should be noted that, for the same negative pressure formation channel, the corresponding test cells can only be placed therein one by one for negative pressure formation treatment. The "continuous" here means that the liquid loss volume exceeds the reference level in succession in the order of negative pressure formation treatment.

[0071] In one embodiment, in obtaining the amount of fluid lost by negative pressure formation of a detection battery and obtaining the negative pressure formation channel corresponding to the detection battery, there are multiple detection batteries, and each negative pressure formation channel corresponds to multiple detection batteries; comparing the amount of fluid lost by the detection battery with a reference level of the amount of fluid lost by the negative pressure formation channel corresponding to the detection battery, and judging whether the negative pressure formation channel corresponding to the detection battery is blocked includes: comparing the amount of fluid lost by each detection battery with a reference level of the amount of fluid lost by the negative pressure formation channel corresponding to each detection battery; if the amount of fluid lost by n consecutive detection batteries among the multiple detection batteries corresponding to the same negative pressure formation channel is greater than the reference level, then judging that the blockage state of the negative pressure formation channel is blocked, wherein n is a positive integer greater than or equal to 2.

[0072] Specifically, taking n=2 as an example, the amount of fluid loss of the detection battery is compared with the reference level of the amount of fluid loss of the negative pressure formation channel corresponding to the detection battery. If the amount of fluid loss of the detection battery is greater than the reference level, it is considered that the negative pressure formation channel is likely to be blocked, and the negative pressure formation channel is marked. The negative pressure formation operation is performed on the next detection battery through the negative pressure formation channel to obtain the amount of fluid loss of the detection battery. If the amount of fluid loss of the detection battery is still greater than the reference level, the negative pressure formation channel is judged to be blocked. If the amount of fluid loss of the detection battery is not greater than the reference level, it is considered that the negative pressure formation channel is in a normal state. By using multiple detection batteries to judge whether the negative pressure formation channel is blocked, the accuracy of the judgment can be improved and misjudgment caused by a single abnormality can be avoided.

[0073] In this embodiment, in one embodiment, as shown in FIG3 , a method for detecting blockage of a negative pressure formation channel is provided, comprising the following steps:

[0074] Step 302 , collecting sample data of the negative pressure formation liquid loss of sample batteries in each negative pressure formation channel, and obtaining the mean value and standard deviation of the liquid loss in each negative pressure formation channel based on the sample data.

[0075] Step 304: The sum of the mean and the standard deviation is used as a reference level of the fluid loss in each negative pressure forming channel.

[0076] Step 306, determining whether the capacity of the negative pressure collection cup in the negative pressure formation channel is greater than a threshold value, if the capacity of the negative pressure collection cup is greater than the threshold value, obtaining the amount of liquid loss in the negative pressure formation of the detection battery.

[0077] Step 308, determining whether there is electrolyte on the surface of the test battery after negative pressure formation, if there is no electrolyte on the surface of the test battery after negative pressure formation, obtaining the amount of liquid lost by negative pressure formation of the test battery.

[0078] Step 310, obtaining the weight of the test battery after the first liquid injection and the weight of the test battery before the second liquid injection.

[0079] Step 312, obtaining the amount of liquid loss of the test battery according to the difference between the weight of the test battery after the first liquid injection and the weight of the test battery before the second liquid injection.

[0080] Step 314, obtaining the identification code of the detection battery, and obtaining the negative pressure formation channel corresponding to the detection battery according to the identification code of the detection battery.

[0081] Step 316, determine whether the battery fluid loss of multiple test batteries negatively pressurized is greater than 0; if the fluid loss of n consecutive test batteries among the multiple test batteries corresponding to the same negative pressure formation channel is not greater than 0, then directly determine that the negative pressure formation channel is in a blocked state, where n is a positive integer not less than 2.

[0082] Step 318, compare the fluid loss of each detection battery with the reference level of the fluid loss of the negative pressure formation channel corresponding to each detection battery. If the fluid loss of n consecutive detection batteries among multiple detection batteries corresponding to the same negative pressure formation channel is greater than the reference level, the blockage state of the negative pressure formation channel is determined to be blockage, where n is a positive integer not less than 2.

[0083] In this embodiment, the blockage condition of the negative pressure formation channel is determined by comparing the amount of liquid lost by the battery during the negative pressure formation process with the baseline level of the negative pressure formation channel in which the battery is located, thereby solving the problem that it is difficult to identify the blockage of individual negative pressure formation channels. The operation is simple and there is no need to improve the negative pressure equipment. The blockage condition of each negative pressure formation channel can be accurately identified, so that the blocked negative pressure formation channel can be cleaned in time, thereby ensuring the formation effect of the battery and improving the consistency and quality of the battery products.

[0084] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are shown in sequence, these steps are not necessarily executed in sequence in the order indicated. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a portion of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily carried out in sequence, but can be executed in turn or alternately with other steps or at least a portion of the steps or stages in other steps.

[0085] Based on the same inventive concept, the embodiment of the present application also provides a negative pressure forming channel blockage detection device for implementing the negative pressure forming channel blockage detection method involved above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above method, so the specific limitations in one or more negative pressure forming channel blockage detection device embodiments provided below can refer to the limitations of the negative pressure forming channel blockage detection method above, and will not be repeated here.

[0086] In one embodiment, as shown in FIG. 4 , a negative pressure forming channel blockage detection device is provided, comprising: an acquisition module 402 and a blockage determination module 404, wherein:

[0087] The acquisition module 402 is used to detect the amount of liquid loss during negative pressure formation of the battery and to acquire the negative pressure formation channel corresponding to the detected battery.

[0088] The blockage determination module 404 is used to compare the fluid loss of the detection battery with the reference level of the fluid loss of the negative pressure formation channel corresponding to the detection battery, and determine whether the negative pressure formation channel corresponding to the detection battery is blocked.

[0089] In one embodiment, it further includes:

[0090] The sample module is used to collect sample data of the negative pressure formation liquid loss of sample batteries in each negative pressure formation channel, and obtain the mean value and standard deviation of the liquid loss in each negative pressure formation channel based on the sample data.

[0091] The reference level module is used to take the sum of the mean and the standard deviation as the reference level of the fluid loss in each negative pressure forming channel.

[0092] In one embodiment, it further includes:

[0093] The weighing module is used to obtain the weight of the test battery after the first liquid injection and the weight of the test battery before the second liquid injection.

[0094] The liquid loss detection module is used to obtain the liquid loss of the detection battery according to the difference between the weight of the detection battery after the first liquid injection and the weight of the detection battery before the second liquid injection.

[0095] In one embodiment, it further includes:

[0096] The positioning module is used to obtain the identification code of the detection battery, and obtain the negative pressure formation channel corresponding to the detection battery according to the identification code of the detection battery.

[0097] In one embodiment, it further includes:

[0098] The first judgment module is used to judge whether the battery liquid loss of the negative pressure formation of the detection battery is greater than 0; if the liquid loss of the detection battery is not greater than 0, directly judge that the negative pressure formation channel corresponding to the detection battery is in a blocked state.

[0099] In one embodiment, it further includes:

[0100] The second judgment module is used to judge whether the battery liquid loss of multiple detection batteries negatively pressurized is greater than 0; if the liquid loss of n consecutive detection batteries among the multiple detection batteries corresponding to the same negative pressure formation channel is not greater than 0, then the negative pressure formation channel is directly judged to be in a blocked state, wherein n is a positive integer not less than 2.

[0101] In one embodiment, it further includes:

[0102] The continuous detection module is used to compare the liquid loss of each detection battery with the reference level of the liquid loss of the negative pressure formation channel corresponding to each detection battery. If the liquid loss of n consecutive detection batteries among multiple detection batteries corresponding to the same negative pressure formation channel is greater than the reference level, the blockage state of the negative pressure formation channel is judged to be blockage, wherein n is a positive integer not less than 2.

[0103] In one embodiment, it further includes:

[0104] The threshold module is used to determine whether the capacity of the negative pressure collection cup in the negative pressure formation channel is greater than the threshold. If the capacity of the negative pressure collection cup is greater than the threshold, the liquid loss of the negative pressure formation of the detection battery is obtained.

[0105] The inspection module is used to determine whether there is electrolyte on the surface of the detection battery after negative pressure formation. If there is no electrolyte on the surface of the detection battery after negative pressure formation, the liquid loss of the detection battery during negative pressure formation is obtained.

[0106] Each module in the above-mentioned negative pressure formation channel blockage detection device can be implemented in whole or in part by software, hardware and their combination. The above-mentioned modules can be embedded in or independent of the processor in the computer device in the form of hardware, or can be stored in the memory of the computer device in the form of software, so that the processor can call and execute the corresponding operations of the above modules.

[0107] In one embodiment, a computer device is provided, which may be a server, and its internal structure diagram may be shown in FIG5. The computer device includes a processor, a memory, an input / output interface (Input / Output, referred to as I / O) and a communication interface. Among them, the processor, the memory and the input / output interface are connected through a system bus, and the communication interface is connected to the system bus through the input / output interface. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The input / output interface of the computer device is used to exchange information between the processor and an external device. The communication interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, a negative pressure formation channel blockage detection method is implemented.

[0108] Those skilled in the art will understand that the structure shown in FIG. 5 is merely a block diagram of a partial structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than shown in the figure, or combine certain components, or have a different arrangement of components.

[0109] In one embodiment, a computer device is further provided, including a memory and a processor, wherein a computer program is stored in the memory, and the processor implements the steps in the above-mentioned method embodiments when executing the computer program.

[0110] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps in the above-mentioned method embodiments are implemented.

[0111] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with relevant laws, regulations and standards of relevant countries and regions.

[0112] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., but are not limited to this.

[0113] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0114] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A method for detecting blockage of a negative pressure formation channel, characterized in that: The method comprises: Obtaining the amount of liquid lost by negative pressure formation of the detection battery, and obtaining the negative pressure formation channel corresponding to the detection battery; The fluid loss of the detection battery is compared with a reference level of the fluid loss of the negative pressure formation channel corresponding to the detection battery to determine whether the negative pressure formation channel corresponding to the detection battery is blocked.

2. The method according to claim 1, characterized in that Before obtaining the amount of liquid loss during negative pressure formation of a detection battery and the negative pressure formation channel corresponding to the detection battery, the method includes: Collecting sample data of the negative pressure formation liquid loss of sample batteries in each negative pressure formation channel, and obtaining the mean value and standard deviation of the liquid loss in each negative pressure formation channel based on the sample data; The sum of the mean and the standard deviation is taken as the reference level of the fluid loss in each negative pressure forming channel.

3. The method according to claim 1, characterized in that The obtaining of the amount of liquid loss caused by the negative pressure of the detection battery comprises: Obtaining the weight of the test battery after the first liquid injection and the weight of the test battery before the second liquid injection; The amount of liquid loss in the test battery is obtained according to the difference between the weight of the test battery after the first liquid injection and the weight of the test battery before the second liquid injection.

4. The method according to claim 1, characterized in that: The obtaining of the negative pressure formation channel corresponding to the detection battery comprises: An identification code of the detection battery is obtained, and a negative pressure formation channel corresponding to the detection battery is obtained according to the identification code of the detection battery.

5. The method according to claim 1, characterized in that The method comprises comparing the liquid loss amount of the detection battery with the reference level of the liquid loss amount of the negative pressure formation channel corresponding to the detection battery to determine whether the negative pressure formation channel corresponding to the detection battery is blocked: It is determined whether the battery fluid loss of the detection battery formed by negative pressure is greater than 0; if the fluid loss of the detection battery is not greater than 0, it is directly determined that the negative pressure formation channel corresponding to the detection battery is in a blocked state.

6. The method according to claim 1, characterized in that In the step of obtaining the amount of liquid lost by negative pressure formation of the detection battery and obtaining the negative pressure formation channel corresponding to the detection battery, the number of the detection batteries is multiple, and each negative pressure formation channel corresponds to multiple detection batteries; The method comprises comparing the liquid loss amount of the detection battery with the reference level of the liquid loss amount of the negative pressure formation channel corresponding to the detection battery to determine whether the negative pressure formation channel corresponding to the detection battery is blocked: Determine whether the battery fluid loss of the multiple detection batteries negatively pressurized is greater than 0; if the fluid loss of n consecutive detection batteries among the multiple detection batteries corresponding to the same negative pressure formation channel is not greater than 0, directly determine that the negative pressure formation channel is in a blocked state, wherein n is a positive integer not less than 2.

7. The method according to claim 1, characterized in that In the step of obtaining the amount of liquid lost by negative pressure formation of the detection battery and obtaining the negative pressure formation channel corresponding to the detection battery, the number of the detection batteries is multiple, and each negative pressure formation channel corresponds to multiple detection batteries; Comparing the liquid loss amount of the detection battery with a reference level of the liquid loss amount of the negative pressure formation channel corresponding to the detection battery to determine whether the negative pressure formation channel corresponding to the detection battery is blocked includes: The liquid loss amount of each detection battery is compared with the reference level of the liquid loss amount of the negative pressure formation channel corresponding to each detection battery. If the liquid loss amount of n consecutive detection batteries among the multiple detection batteries corresponding to the same negative pressure formation channel is greater than the reference level, the blockage state of the negative pressure formation channel is judged to be blockage, wherein n is a positive integer not less than 2.

8. The method according to claim 1, characterized in that Before obtaining the amount of liquid loss caused by negative pressure in the detection battery, it includes: Determine whether the capacity of the negative pressure collection cup in the negative pressure formation channel is greater than a threshold value, and if the capacity of the negative pressure collection cup is greater than the threshold value, obtain the liquid loss of the negative pressure formation of the detection battery; And / or, determining whether there is electrolyte on the surface of the detection battery after negative pressure formation, and if there is no electrolyte on the surface of the detection battery after negative pressure formation, obtaining the amount of liquid lost by negative pressure formation of the detection battery.

9. A negative pressure formation channel blockage detection device, characterized in that: The device comprises: An acquisition module, used to detect the amount of liquid loss during negative pressure formation of the battery, and to obtain the negative pressure formation channel corresponding to the detected battery; The blockage judgment module is used to compare the fluid loss of the detection battery with the reference level of the fluid loss of the negative pressure formation channel corresponding to the detection battery, and judge whether the negative pressure formation channel corresponding to the detection battery is blocked.

10. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 8 are implemented.

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