Battery formation exhaust method and device and electronic equipment

Abstract

The embodiment of the invention provides a battery formation exhaust method and device and electronic equipment, and belongs to the technical field of battery manufacturing. The method comprises the following steps: charging a battery according to a preset current, and obtaining the state of charge of the battery; when the state of charge is greater than or equal to a first preset threshold value, applying a preset pressure and a pulse with a preset frequency to the interior of the battery; when the charge state is greater than or equal to a second preset threshold value, stopping applying the pulse to the interior of the battery; and when the state of charge is equal to a third preset threshold value, stopping charging the battery, the third preset threshold value being greater than or equal to a second preset threshold value, and the second preset threshold value being greater than or equal to the first preset threshold value. The method can improve the battery performance.

Description

Technical Field

[0001] The present application relates to the field of battery manufacturing technology, and in particular to a battery formation exhaust method, device and electronic equipment. Background Art

[0002] During the first charging (i.e. formation) process of the battery, the positive and negative electrode materials react electrochemically with the electrolyte to form a solid electrolyte interface film.

[0003] During the formation of the solid electrolyte interface film, gases such as carbon monoxide are generated. If these gases cannot be discharged in time, they will exist on the surface of the battery negative electrode in the form of bubbles, which will lead to quality problems such as black spots on the battery negative electrode, affecting battery performance. Existing technologies usually use negative pressure exhaust or clamp extrusion exhaust.

[0004] However, existing venting methods can cause electrolyte overflow inside the battery, resulting in equipment corrosion and battery casing corrosion. Summary of the invention

[0005] The embodiments of the present application provide a battery formation exhaust method, device and electronic equipment, which can improve battery performance.

[0006] In a first aspect, an embodiment of the present application provides a battery formation exhaust method, comprising: charging a battery according to a preset current, and obtaining a state of charge of the battery;

[0007] When the state of charge is greater than or equal to a first preset threshold, applying pulses of preset pressure and preset frequency to the interior of the battery;

[0008] When the state of charge is greater than or equal to a second preset threshold, stopping applying the pulse to the inside of the battery;

[0009] When the state of charge is equal to a third preset threshold, charging of the battery is stopped, the third preset threshold is greater than or equal to the second preset threshold, and the second preset threshold is greater than or equal to the first preset threshold.

[0010] In a possible implementation manner, charging the battery according to a preset current includes:

[0011] Acquiring charging status information of the battery, wherein the charging status information includes at least one of a charging voltage, a charging current, and a charging time;

[0012] The state of charge of the battery is obtained according to the charging state information.

[0013] In a possible implementation manner, applying pulses of preset pressure and preset frequency to the interior of the battery includes:

[0014] Acquire a variation period of the pulse according to the preset frequency, wherein the variation period includes a first sub-variation period and a second sub-variation period;

[0015] According to the variation cycle, the pulse of the preset pressure is applied to the interior of the battery by means of inflation or exhaust.

[0016] In a possible implementation manner, applying the pulse of the preset pressure to the interior of the battery by way of inflation or exhaust according to the variation cycle includes:

[0017] In the first sub-change period, applying pressure to the interior of the battery by means of inflation;

[0018] In the second sub-change period, the pressure inside the battery is released by exhausting gas;

[0019] The pressure state information of the battery during the pulse application process is acquired, wherein the pressure state information includes a pulse pressure value and a pulse pressure action time, and a pulse image of the pulse pressure is obtained according to the pressure state information.

[0020] In a possible implementation manner, the first sub-change period includes a first pressure charging stage and a first pressure maintaining stage, the preset pressure includes a first preset pressure, and in the first sub-change period, applying pressure to the inside of the battery by means of inflation includes:

[0021] In the first charging stage, pressure is applied to the interior of the battery by means of inflation, so that the pressure inside the battery is equal to the first preset pressure;

[0022] In the first pressure-maintaining stage, the amount of gas produced by formation inside the battery is obtained, and the pulse pressure value is adjusted according to the amount of gas produced by formation, so that the pressure inside the battery is equal to the first preset pressure.

[0023] In a possible implementation manner, obtaining the amount of gas produced by formation inside the battery includes:

[0024] Obtaining a pressure value inside the battery;

[0025] When the pressure value inside the battery is greater than the first preset pressure, the amount of gas produced by the formation inside the battery is obtained according to the pressure change value, and the pressure inside the battery is released.

[0026] In a possible implementation manner, the second sub-change period includes a second pressure relief stage and a second pressure holding stage, the preset pressure also includes a second preset pressure, and in the second sub-change period, releasing the pressure inside the battery by exhausting the gas includes:

[0027] In the second pressure relief stage, the pressure inside the battery is released by exhausting air;

[0028] In the second pressure-maintaining stage, the amount of gas produced by formation inside the battery is obtained, and the pulse pressure value is adjusted according to the amount of gas produced by formation, so that the pressure inside the battery is equal to a second preset pressure.

[0029] In a possible implementation manner, obtaining the amount of gas produced by formation inside the battery includes:

[0030] Obtaining a pressure value inside the battery;

[0031] When the pressure value inside the battery is greater than the second preset pressure, the amount of gas produced by the formation inside the battery is obtained according to the pressure change value, and the pressure inside the battery is released.

[0032] In a second aspect, an embodiment of the present application provides a battery formation exhaust device, comprising:

[0033] An acquisition module, used to charge the battery according to a preset current and acquire the state of charge of the battery;

[0034] A pressure pulse module, used for applying a pulse of a preset pressure and a preset frequency to the inside of the battery when the state of charge is greater than or equal to a first preset threshold;

[0035] The pressure pulse module is further configured to stop applying the pulse to the inside of the battery when the state of charge is greater than or equal to a second preset threshold;

[0036] The charging and discharging module is used to stop charging the battery when the state of charge is equal to a third preset threshold, the third preset threshold is greater than or equal to the second preset threshold, and the second preset threshold is greater than or equal to the first preset threshold.

[0037] In a third aspect, an embodiment of the present application provides a battery formation exhaust device, comprising: a processor, and a memory communicatively connected to the processor;

[0038] The memory stores computer-executable instructions;

[0039] The processor executes the computer-executable instructions stored in the memory, so that the processor executes the above first aspect and / or various possible implementations of the first aspect.

[0040] The battery formation exhaust method, device and electronic device provided in the embodiments of the present application can effectively eliminate bubbles generated on the battery pole pieces by applying pulses of preset pressure and preset frequency to the inside of the battery during the battery charging process when the battery's state of charge is greater than or equal to a first preset threshold value, and can prevent electrolyte overflow caused by excessive internal negative pressure during the battery formation process by applying pulses of preset pressure and preset frequency to the inside of the battery, thereby avoiding contamination and loss of the electrolyte, thereby achieving the effect of improving battery performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0042] Figure 1 System architecture diagram provided for this application;

[0043] Figure 2 Schematic diagram of the process of battery formation exhaust method provided in this application Figure 1 ;

[0044] Figure 3 Schematic diagram of the process of battery formation exhaust method provided in this application Figure 2 ;

[0045] Figure 4 Schematic diagram of the process of battery formation exhaust method provided in this application Figure 3 ;

[0046] Figure 5 Schematic diagram of the process of battery formation exhaust method provided in this application Figure 4 ;

[0047] Figure 6 A pulse curve diagram of the battery formation exhaust method provided in this application;

[0048] Figure 7 A gas production curve diagram of the battery formation exhaust method provided in this application;

[0049] Figure 8 A formation interface diagram of the battery formation exhaust method provided in this application;

[0050] Fig. 9 This is a schematic diagram of the structure of the battery formation exhaust equipment provided in this application.

[0051] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0052] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0053] Battery formation (also called battery activation or battery formation) is a key step in the battery manufacturing process. Its main purpose is to enable the newly manufactured battery to achieve its designed performance and ensure that it can work stably during use. Specifically, the battery needs to be charged and activated for the first time after injection. During the battery charging process, the additives in the electrolyte will react chemically on the surface of the battery's negative electrode to form a solid electrolyte interface film (Solid Electrolyte Interphase, SEI), which can protect the electrode material and increase the cycle life of the battery. During the formation of the SEI film, gases such as carbon monoxide are produced. If the gas generated during the formation process cannot be discharged in time, it will remain on the surface of the battery's negative electrode in the form of bubbles, which will hinder the embedding of ions during the charging process, causing black spots on the battery's negative electrode, resulting in quality problems and affecting battery performance.

[0054] In the prior art, negative pressure exhaust or clamp extrusion exhaust is usually used. However, the existing exhaust method will cause the electrolyte inside the battery to overflow, causing equipment corrosion and battery shell corrosion.

[0055] The battery formation exhaust method provided in the embodiment of the present application applies pulses of preset pressure and preset frequency to the inside of the battery during the battery charging process, so that the pressure inside the battery can change periodically, thereby achieving vibration and squeezing of bubbles, thereby eliminating bubbles on the battery pole piece. In addition, by applying pulses to the inside of the battery by means of inflation and exhaust, the pressure inside the battery can be kept within a suitable range, preventing excessive negative pressure inside the battery from causing electrolyte overflow.

[0056] The technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems are described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0057] Figure 1 The system architecture diagram provided for this application is as follows: Figure 1As shown, the battery formation exhaust system of the present application includes a battery installation module 100, a charge and discharge module 200, a pulse module 300, a data acquisition module 400, a data processing module 500, and a data transmission module 600. The battery installation module 100 is mainly used to place and fix the battery to be formed to ensure that the battery remains stable during the formation process and prevent damage caused by vibration or movement. The charge and discharge module 200 is mainly used to charge and discharge the battery to activate the chemical substances inside the battery and ensure the battery performance. The pulse module 300 promotes the discharge of gas inside the battery by applying a pressure pulse and ensures the pressure control of the battery during the formation process. The data acquisition module 400 is used to collect real-time data from various functional modules (such as the battery installation module 100, the charge and discharge module 200, the pulse module 300, etc.), and store these data for further analysis and processing by the data processing module 500. The data processing module 500 can obtain raw data from the data acquisition module 400 for processing, analysis and calculation. The data transmission module 600 can ensure that all critical data can be communicated effectively, reliably and securely between different systems and with the Manufacturing Execution System (MES).

[0058] Figure 2 Schematic diagram of the process of battery formation exhaust method provided in this application Figure 1 ,like Figure 2 As shown, the method includes:

[0059] S201. Charge a battery according to a preset current and obtain a state of charge of the battery.

[0060] Specifically, according to the specifications of the battery and the formation process requirements, a suitable preset charging current is set. Optionally, the charging current can range from 0.01C to 1.00C. It should be noted that the charging current of the present application can be determined according to the specifications, type and formation process of the battery, and this is not specifically limited in this embodiment.

[0061] The state of charge of a battery can be expressed as the battery state of charge (SOC). SOC is an important parameter in the battery management system (BMS) that is used to monitor and manage the use of the battery. SOC refers to the proportion of the battery's current remaining power to its total capacity, usually expressed as a percentage. For example, if a battery's SOC is 80%, it means that the battery's current remaining power is 80% of its total capacity. Among them, the SOC value range is usually from 0% to 100%, where 0% means that the battery is fully discharged and 100% means that the battery is fully charged.

[0062] In the specific implementation process, when charging the battery according to the preset current, the charging status information such as the charging voltage, charging current and charging time of the battery can be monitored and recorded. Specifically, the charging voltage of the battery can be measured in real time by the voltage sensor, the actual current flowing into the battery can be measured in real time by the current sensor, and the time from the start of charging to the current moment can be recorded, so as to calculate the state of charge of the battery.

[0063] S202: When the state of charge is greater than or equal to a first preset threshold, pulses of preset pressure and preset frequency are applied to the interior of the battery.

[0064] Specifically, the first preset threshold value can be determined according to the characteristics of the battery and the formation process requirements, and this application does not make any specific limitations here.

[0065] In the above stage, the battery is in a relatively low state of charge, and the gas generation inside the battery is relatively active. At this time, a pulse is applied to the battery through the injection port to make the internal pressure of the battery fluctuate within a certain range. By applying pulses of preset pressure and preset frequency to the inside of the battery, a regular positive pressure can be applied to the bubbles generated on the battery pole pieces during the formation process, and then the bubbles can be squeezed and vibrated, so that large bubbles are quickly compressed and broken, thereby promoting exhaust during the battery formation process.

[0066] When pulses of preset pressure and preset frequency are applied to the inside of the battery, the pressure variation range inside the battery can be determined according to the actual conditions of different batteries, and this application does not make specific restrictions here. Among them, the actual upper limit of pressure can be determined by the explosion pressure of the explosion-proof valve. The lower limit of pressure can be determined according to the actual exhaust effect to avoid the lower limit of pressure being too low, making it difficult to discharge gas. Optionally, the pressure variation range inside the battery can be 0.1MPa~3.0MPa. The pulse frequency can be determined according to the actual conditions of different batteries, and this application does not make specific restrictions here. Optionally, the pulse frequency can be 0Hz~10Hz.

[0067] S203: When the state of charge is greater than or equal to a second preset threshold, stop applying pulses to the inside of the battery.

[0068] Specifically, the second preset threshold value can be determined according to the characteristics of the battery and the formation process requirements, and the present application does not impose any specific restrictions thereon. Typically, the second preset threshold value is greater than or equal to the first preset threshold value.

[0069] In one possible design, the combination Figure 7As shown, the first preset threshold value can be 15%, and the second preset threshold value can be 30%. When the battery SOC reaches 15%, the gas generated on the battery electrode will be significantly reduced or stopped. At this time, continuing to apply pulses may cause unnecessary stress to the battery, so when the battery SOC reaches a certain value, the pulse should be stopped. Although the gas generation has been significantly reduced when the battery SOC reaches 15%, the formation process of the electrode material may not be fully completed. Continuing to charge the battery to a higher SOC (such as 30%) can ensure that the electrode material is further activated and a more stable solid electrolyte interphase (SEI) is formed. Stopping the application of pulses to the inside of the battery at the second preset threshold can make the formation of the SEI layer more stable and uniform, which helps to improve the cycle performance and safety of the battery.

[0070] like Figure 8 As shown, through the battery formation exhaust method provided by the present application, after the formation is completed, the battery is fully charged and disassembled, and it can be seen that there are no black spots or lithium deposition on the negative electrode of the battery.

[0071] S204: Stop charging the battery when the state of charge is equal to a third preset threshold, the third preset threshold is greater than or equal to the second preset threshold, and the second preset threshold is greater than or equal to the first preset threshold.

[0072] Specifically, the third preset threshold is the final SOC value for stopping charging the battery. The third preset threshold can be determined according to the actual situation of different batteries, and this application does not make specific restrictions here. Optionally, the third preset threshold can be between 50% and 100%.

[0073] The battery formation exhaust method provided in the embodiment of the present application can effectively eliminate bubbles generated on the battery pole pieces by applying pulses of preset pressure and preset frequency to the inside of the battery during the battery charging process, and can prevent electrolyte overflow caused by excessive internal negative pressure during the battery formation process by applying pulses of preset pressure and preset frequency to the inside of the battery, thereby avoiding contamination and loss of the electrolyte, thereby achieving the effect of improving battery performance.

[0074] Figure 3 Schematic diagram of the process of battery formation exhaust method provided in this application Figure 2 ,like Figure 3 As shown, in this embodiment Figure 2 Based on the embodiment, the process of applying pulses of preset pressure and preset frequency inside the battery is described in detail, and the method includes:

[0075] S301, charging the battery according to a preset current.

[0076] S302: Obtain battery charging status information.

[0077] S303: Obtain the state of charge of the battery according to the charging state information.

[0078] In a possible design, when charging the battery according to a preset current, the charging status information such as the charging voltage, charging current and charging time of the battery can be monitored and recorded. Specifically, the charging voltage of the battery can be measured in real time by a voltage sensor, the actual current flowing into the battery can be measured in real time by a current sensor, and the time from the start of charging to the current moment can be recorded, and then the state of charge of the battery can be calculated. For example, for a lithium-ion battery with a rated capacity of 50Ah, the preset current can be set to 25A. Charge the battery at a current of 25A, record the terminal voltage of the battery once per second, record the actual current flowing into the battery once per second, and record the time from the start of charging to the current moment. By integrating the charging current, calculate the total amount of electricity charged into the battery. For example, if the charging current is 25A and the duration is 1 hour, the amount of electricity charged is 25Ah. Then the battery SOC is: 50Ah / 25Ah×100%=50%.

[0079] S304: When the state of charge is greater than or equal to a first preset threshold, obtaining a pulse variation period according to a preset frequency.

[0080] Specifically, the pulse variation period is negatively correlated with the pulse frequency. The variation period can be determined according to the characteristics of the battery and the formation process requirements, and the present application does not make any specific restrictions here.

[0081] The variation cycle of the pulse includes a first sub-variation cycle and a second sub-variation cycle. The first sub-variation cycle and the second sub-variation cycle constitute a completed variation cycle.

[0082] S305 . In the first sub-change cycle, pressure is applied to the interior of the battery by means of inflation.

[0083] S306. In the second sub-change cycle, the pressure inside the battery is released by exhausting the gas.

[0084] S307 , obtaining pressure state information of the battery during the pulse application process, the pressure state information including the pulse pressure value and the pulse pressure action time, and obtaining a pulse image of the pulse pressure according to the pressure state information.

[0085] In one possible design, the combination Figure 6 As shown, 1s to 2s may be the first sub-change period, and 2s to 3s may be the second sub-change period. Figure 6As shown, in the first sub-change cycle, a pulse of 0.3MPa is applied to the inside of the battery. In the first sub-change cycle, the internal pressure of the battery increases, and the bubbles on the battery pole piece are compressed. In the second sub-change cycle, the internal pressure of the battery drops to 0.1MPa. As the pressure decreases, the previously compressed bubbles will tend to restore their original volume or expand further. Through the alternating action of the first sub-change cycle and the second sub-change cycle, the bubbles can be squeezed and oscillated through pressure changes, so that large bubbles are quickly compressed and broken, thereby promoting exhaust during the battery formation process.

[0086] S308: When the state of charge is greater than or equal to a second preset threshold, stop applying pulses to the inside of the battery.

[0087] S309: When the state of charge is equal to a third preset threshold, stop charging the battery.

[0088] Steps S308-S309 and Figure 2 Steps S203-S204 in the embodiment are similar and will not be described in detail in this embodiment.

[0089] The battery formation exhaust method provided in the embodiment of the present application can effectively compress the bubbles inside the battery and reduce their volume by applying a high-pressure pulse in the first sub-change cycle; and in the subsequent second sub-change cycle, when the pressure is reduced, these compressed bubbles will return to their original size or even expand. In the above process, smaller bubbles can merge into larger bubbles, making it easier to escape from the battery. Repeating the above process helps to completely remove excess gas in the battery.

[0090] Figure 4 Schematic diagram of the process of battery formation exhaust method provided in this application Figure 3 ,like Figure 4 As shown, in this embodiment Figure 3 Based on the embodiment, a process of applying pressure to the inside of the battery by means of inflation in the first sub-change period is described in detail. The method includes:

[0091] S305a, in the first charging stage, applying pressure to the interior of the battery by means of inflation, so that the pressure inside the battery is equal to a first preset pressure.

[0092] In the specific implementation process, pressure is applied to the inside of the battery by inflation so that the pressure inside the battery reaches a first preset pressure (e.g., 0.3 MPa). The main purpose of the first pressure charging stage is to increase the pressure inside the battery so as to compress the gas inside the battery, especially the bubbles on the electrode surface. The high-pressure environment helps to squeeze these bubbles more tightly, preparing for the subsequent gas release.

[0093] S305b: In the first pressure-maintaining stage, the pressure value inside the battery is obtained.

[0094] In the specific implementation process, in the first pressure holding stage, the pressure inside the battery is kept stable, and the actual pressure value inside the battery is obtained. In the first pressure holding stage, monitoring and recording the pressure changes inside the battery can help determine whether the expected pressure level is reached inside the battery, and can be used to check the battery's sealing and structural integrity.

[0095] S305c: when the pressure value inside the battery is greater than the first preset pressure, the amount of gas produced by the formation inside the battery is obtained according to the pressure change value, and the pressure inside the battery is released.

[0096] In the specific implementation process, it is determined whether the pressure value inside the battery is greater than the first preset pressure. If so, the gas production of the battery is obtained according to the pressure change value, and the pressure inside the battery is released. If not, the internal pressure of the battery continues to be maintained. This step is used to monitor the changes in the internal pressure of the battery. When the pressure exceeds the set value, it indicates that additional gas may be generated. By calculating the pressure change value, the amount of gas generated during the formation process can be indirectly obtained. The subsequent release of excess pressure is to avoid damage to the battery caused by excessive internal pressure.

[0097] S305d, adjusting the pulse pressure value according to the gas production amount so that the pressure inside the battery is equal to the first preset pressure.

[0098] In the specific implementation process, the pressure value of the pulse is adjusted accordingly according to the obtained gas production, so that the pressure inside the battery returns to the first preset pressure. Figure 6 As shown, in the first sub-change cycle, as charging proceeds, the battery pole piece will produce a certain amount of gas. The presence of these gases will cause the internal pressure of the battery to rise above the preset value. Then, in the first pressure maintenance stage, it is necessary to release part of the pressure inside the battery so that the internal pressure of the battery returns to the first preset pressure. Adaptive adjustment is performed by feedback of the actual pressure after each inflation to ensure that the pressure inside the battery can be stabilized near the first preset pressure even when additional gas is generated. Therefore, due to the real-time monitoring and adjustment process, the actual pressure may fluctuate within a small range close to but not completely equal to the first preset pressure.

[0099] The battery formation exhaust method provided by the embodiment of the present application can effectively compress the gas inside the battery, especially the bubbles on the surface of the battery pole piece, by setting the first pressure charging stage. By continuously monitoring and recording the actual pressure value inside the battery during the pressure holding stage, it can be ensured that the internal pressure of the battery is stabilized at the first preset pressure to achieve accurate control of the battery state. By monitoring the changes in the internal pressure of the battery, the sealing and structural integrity of the battery can be checked. In addition, by obtaining the pressure data inside the battery during the first pressure holding stage, the amount of gas generated during the formation process can be indirectly obtained, and then the pulse pressure value can be adjusted according to the formation gas production to ensure the consistency of the internal pressure of the battery during the entire formation process.

[0100] Figure 5 Schematic diagram of the process of battery formation exhaust method provided in this application Figure 4 ,like Figure 5 As shown, the method includes:

[0101] S306a, in the second pressure relief stage, the pressure inside the battery is released by exhausting air.

[0102] In the specific implementation process, after the first sub-change cycle ends, the pressure inside the battery is reduced from the first preset pressure (e.g., 0.3 MPa) to the second preset pressure (e.g., 0.1 MPa). The purpose of the second pressure relief stage is to release part of the pressure inside the battery. As the pressure drops, the previously compressed bubbles will expand, helping to push the gas out of the battery.

[0103] S306b, in the second pressure maintaining stage, obtaining the pressure value inside the battery.

[0104] In a specific implementation process, after the internal pressure of the battery drops to the second preset pressure, the second preset pressure is maintained in the second pressure holding stage. During this period, monitoring and recording the pressure changes inside the battery can help determine whether the expected pressure level is reached inside the battery, and can be used to check the battery's sealing and structural integrity.

[0105] S306c: When the pressure value inside the battery is greater than the second preset pressure, the amount of gas produced by the formation inside the battery is obtained according to the pressure change value, and the pressure inside the battery is released.

[0106] In the specific implementation process, it is determined whether the pressure value inside the battery is greater than the second preset pressure. If so, the gas production of the battery is obtained according to the pressure change value, and the pressure inside the battery is released. If not, the pressure inside the battery continues to be maintained. This step is used to monitor the changes in the pressure inside the battery. When the pressure exceeds the set value, it indicates that additional gas may be generated. By calculating the pressure change value, the amount of gas generated during the formation process can be indirectly obtained. The subsequent release of excess pressure is to avoid damage to the battery caused by excessive internal pressure.

[0107] S306d, adjusting the pulse pressure value according to the gas production amount so that the pressure inside the battery is equal to the second preset pressure.

[0108] In the specific implementation process, the pressure value of the pulse is adjusted accordingly according to the obtained gas production, so that the pressure inside the battery returns to the second preset pressure. Figure 6 As shown, in the second sub-change cycle, as charging proceeds, the battery pole piece will produce a certain amount of gas. The presence of these gases will cause the internal pressure of the battery to rise above the preset value. Then, in the second pressure maintenance stage, it is necessary to release part of the pressure inside the battery so that the internal pressure of the battery returns to the second preset pressure. The internal pressure of the battery is adaptively adjusted by the formation gas production to ensure that the pressure inside the battery can be stabilized near the second preset pressure even in the case of additional gas generation. Therefore, due to the real-time monitoring and adjustment process, the actual pressure may fluctuate within a small range close to but not completely equal to the second preset pressure.

[0109] The battery formation exhaust device provided in the embodiment of the present application includes: a battery installation module 100, a charge and discharge module 200, a pulse module 300, a data acquisition module 400, a data processing module 500, and a data transmission module 600.

[0110] The charging and discharging module 200 is used to charge the battery according to a preset current and obtain the state of charge of the battery.

[0111] The pulse module 300 is used to apply pulses of preset pressure and preset frequency to the inside of the battery when the state of charge is greater than or equal to a first preset threshold.

[0112] The pulse module 300 is further configured to stop applying pulses to the inside of the battery when the state of charge is greater than or equal to a second preset threshold.

[0113] The charging and discharging module 200 is further configured to stop charging the battery when the state of charge is equal to a third preset threshold.

[0114] In a possible implementation, the charge and discharge module 200 is further used for:

[0115] Get the battery charging status information.

[0116] The state of charge of the battery is obtained according to the charging state information.

[0117] In a possible implementation, the pulse module 300 is further used for:

[0118] Get the pulse variation period according to the preset frequency.

[0119] According to the change cycle, pulses of preset pressure are applied to the inside of the battery by means of inflation or exhaust.

[0120] In a possible implementation, the pulse module 300 is further used for:

[0121] In the first sub-variation cycle, pressure is applied to the interior of the battery by means of inflation;

[0122] In the second sub-change cycle, the pressure inside the battery is released by exhausting;

[0123] The pressure state information of the battery during the pulse application process is obtained, the pressure state information includes the pulse pressure value and the pulse pressure action time, and a pulse image of the pulse pressure is obtained according to the pressure state information.

[0124] In a possible implementation, the pulse module 300 is further used for:

[0125] In the first pressure charging stage, pressure is applied to the interior of the battery by means of inflation, so that the pressure inside the battery is equal to a first preset pressure;

[0126] In the first pressure-maintaining stage, the amount of gas produced by the formation inside the battery is obtained, and the pulse pressure value is adjusted according to the amount of gas produced by the formation, so that the pressure inside the battery is equal to the first preset pressure.

[0127] In a possible implementation, the pulse module 300 is further used for:

[0128] Get the pressure value inside the battery.

[0129] When the pressure value inside the battery is greater than the first preset pressure, the amount of gas produced by the formation inside the battery is obtained according to the pressure change value, and the pressure inside the battery is released.

[0130] In a possible implementation, the pulse module 300 is further used for:

[0131] In the second pressure relief stage, the pressure inside the battery is released by exhausting gas;

[0132] In the second pressure-maintaining stage, the amount of gas produced by the formation inside the battery is obtained, and the pulse pressure value is adjusted according to the amount of gas produced by the formation, so that the pressure inside the battery is equal to the second preset pressure.

[0133] In a possible implementation, the pulse module 300 is further used for:

[0134] Get the pressure value inside the battery;

[0135] When the pressure value inside the battery is greater than the second preset pressure, the amount of gas produced by the formation inside the battery is obtained according to the pressure change value, and the pressure inside the battery is released.

[0136] In one possible design, the battery installation module 100 can also provide electrical and mechanical interfaces with other modules such as the charging and discharging module 200 and the pulse module 300 to facilitate data acquisition and control. The battery installation module 100 may include a storage rack, a battery tray, and an electrical interface. The storage rack is usually made of high-strength steel or aluminum alloy to ensure the stability and durability of the structure. The size of the storage rack is designed according to the size and number of the batteries to be formed, and this application does not make specific restrictions here. The battery tray is made of insulating material (such as plastic or composite material) to prevent the battery from short-circuiting. A fixing device (such as a buckle, a clamp, etc.) is provided on the tray to fix the battery to prevent it from moving during operation. The tray is provided with a standard electrical connection terminal for connecting the charging and discharging module 200 and the pulse module 300. The tray also provides interfaces such as pressure sensors and temperature sensors to facilitate the data acquisition module 400 to obtain relevant data.

[0137] In one possible design, the charge and discharge module 200 may include a power supply, a charge and discharge probe assembly, etc. The power supply may be a programmable DC power supply capable of providing a voltage of up to 500V and a current of 100A. The probe in the charge and discharge probe assembly may be made of gold-plated copper material, which has good conductivity and wear resistance. The probe may be a spring-type probe to ensure good contact with the battery terminal.

[0138] In one possible design, the pulse module 300 includes a nozzle, and the nozzle of the pulse module 300 corresponds to the battery filling port. The nozzle of the pulse module 300 can apply pulse pressure to the battery through the filling port, so that the internal pressure of the battery fluctuates within a certain range. The pulse module 300 also has a gas flow measurement function, which can monitor and calculate the gas flow generated during the formation process in real time, so as to obtain the gas production of the battery. The pulse module 300 can work in conjunction with the data acquisition module 400 to record data such as changes in pressure pulses and gas flow for subsequent analysis and optimization.

[0139] In one possible design, the data acquisition module 400 can be connected to various types of sensors, such as a temperature sensor, a pressure sensor, a current sensor, a voltage sensor, and a gas flow meter, so as to obtain detailed parameters of the battery and its surrounding environment.

[0140] In one possible design, the data processing module 500 can be used to calculate the battery charge state. The data processing module 500 can also be used to generate a pulse pressure image according to the pressure state information. By observing the pulse pressure image, the uniformity and consistency of the pressure pulse and whether there is an abnormality can be determined.

[0141] In one possible design, the data transmission module 600 can exchange data in real time to ensure that the data generated during the formation process can be immediately transmitted to the relevant modules. The data transmission module 600 uploads various data (such as the battery's state of charge, pressure pulse image, gas flow, etc.) during the battery formation process to the enterprise's MES system for production management and quality tracking.

[0142] Fig. 9 This is a schematic diagram of the structure of the battery formation exhaust equipment provided in this application. Fig. 9 As shown, the battery formation exhaust device 90 provided in this embodiment includes: at least one processor 901 and a memory 902. Optionally, the device 90 also includes a communication component 903. The processor 901, the memory 902 and the communication component 903 are connected via a bus 904.

[0143] In a specific implementation process, at least one processor 901 executes the computer execution instructions stored in the memory 902, so that at least one processor 901 executes the above method.

[0144] The specific implementation process of the processor 901 can be found in the above method embodiment, and its implementation principle and technical effect are similar, so this embodiment will not be repeated here.

[0145] In the above embodiments, it should be understood that the processor can be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), etc. A general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in the invention can be directly implemented as a hardware processor, or can be implemented by a combination of hardware and software modules in the processor.

[0146] The memory may include a high-speed memory (Random Access Memory, RAM), and may also include a non-volatile memory (NVM), such as at least one disk storage.

[0147] The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, the bus in the drawings of this application is not limited to only one bus or one type of bus.

[0148] The present application also provides a computer-readable storage medium, in which computer-executable instructions are stored. When a processor executes the computer-executable instructions, the above method is implemented.

[0149] The above-mentioned readable storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk. The readable storage medium can be any available medium that can be accessed by a general or special-purpose computer.

[0150] An exemplary readable storage medium is coupled to a processor so that the processor can read information from the readable storage medium and write information to the readable storage medium. Of course, the readable storage medium can also be a component of the processor. The processor and the readable storage medium can be located in an application specific integrated circuit (ASIC). Of course, the processor and the readable storage medium can also exist in the device as discrete components.

[0151] The division of units is only a logical function division, and there may be other divisions in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interface, device or unit, which can be electrical, mechanical or other forms.

[0152] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0153] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0154] If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods of each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc. Various media that can store program codes.

[0155] Those skilled in the art can understand that all or part of the steps of implementing the above-mentioned method embodiments can be completed by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When the program is executed, the steps of the above-mentioned method embodiments are executed; and the aforementioned storage medium includes: ROM, RAM, magnetic disk or optical disk and other media that can store program codes.

[0156] Finally, it should be noted that those skilled in the art will readily conceive of other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. The present invention is intended to cover any variations, uses or adaptations of the present invention, which follow the general principles of the present invention and include common knowledge or customary technical means in the art not disclosed by the present invention, are not limited to the precise structure described above and shown in the drawings, and may be modified and changed in various ways without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A battery formation exhaust method, characterized in that: include: Charging the battery according to a preset current and obtaining the state of charge of the battery; When the state of charge is greater than or equal to a first preset threshold, applying pulses of preset pressure and preset frequency to the interior of the battery; When the state of charge is greater than or equal to a second preset threshold, stopping applying the pulse to the inside of the battery; When the state of charge is equal to a third preset threshold, charging of the battery is stopped, the third preset threshold is greater than or equal to the second preset threshold, and the second preset threshold is greater than or equal to the first preset threshold.

2. The method according to claim 1, characterized in that The step of charging the battery according to the preset current includes: Acquiring charging status information of the battery, wherein the charging status information includes at least one of a charging voltage, a charging current, and a charging time; The state of charge of the battery is obtained according to the charging state information.

3. The method according to claim 2, characterized in that The step of applying a pulse of a preset pressure and a preset frequency to the interior of the battery comprises: Acquire a variation period of the pulse according to the preset frequency, wherein the variation period includes a first sub-variation period and a second sub-variation period; According to the variation cycle, the pulse of the preset pressure is applied to the interior of the battery by means of inflation or exhaust.

4. The method according to claim 3, characterized in that The pulse of applying the preset pressure to the interior of the battery by means of inflation or exhaust according to the variation cycle comprises: In the first sub-change period, applying pressure to the interior of the battery by means of inflation; In the second sub-change period, the pressure inside the battery is released by exhausting gas; The pressure state information of the battery during the pulse application process is acquired, wherein the pressure state information includes a pulse pressure value and a pulse pressure action time, and a pulse image of the pulse pressure is obtained according to the pressure state information.

5. The method according to claim 4, characterized in that The first sub-change cycle includes a first pressure charging stage and a first pressure maintaining stage, the preset pressure includes a first preset pressure, and in the first sub-change cycle, applying pressure to the inside of the battery by inflation includes: In the first charging stage, pressure is applied to the interior of the battery by means of inflation, so that the pressure inside the battery is equal to the first preset pressure; In the first pressure-maintaining stage, the amount of gas produced by formation inside the battery is obtained, and the pulse pressure value is adjusted according to the amount of gas produced by formation, so that the pressure inside the battery is equal to the first preset pressure.

6. The method according to claim 5, characterized in that The obtaining of the amount of gas produced by formation inside the battery comprises: Obtaining a pressure value inside the battery; When the pressure value inside the battery is greater than the first preset pressure, the amount of gas produced by the formation inside the battery is obtained according to the pressure change value, and the pressure inside the battery is released.

7. The method according to claim 4, characterized in that The second sub-change cycle includes a second pressure relief stage and a second pressure holding stage, the preset pressure also includes a second preset pressure, and in the second sub-change cycle, releasing the pressure inside the battery by exhausting, including: In the second pressure relief stage, the pressure inside the battery is released by exhausting air; In the second pressure-maintaining stage, the amount of gas produced by the formation inside the battery is obtained, and the pulse pressure value is adjusted according to the amount of gas produced by the formation, so that the pressure inside the battery is equal to a second preset pressure.

8. The method according to claim 7, characterized in that The obtaining of the amount of gas produced by formation inside the battery comprises: Obtaining a pressure value inside the battery; When the pressure value inside the battery is greater than the second preset pressure, the amount of gas produced by the formation inside the battery is obtained according to the pressure change value, and the pressure inside the battery is released.

9. A battery formation exhaust device, characterized in that: include: An acquisition module, used to charge the battery according to a preset current and acquire the state of charge of the battery; A pressure pulse module, used for applying a pulse of a preset pressure and a preset frequency to the inside of the battery when the state of charge is greater than or equal to a first preset threshold; The pressure pulse module is further configured to stop applying the pulse to the inside of the battery when the state of charge is greater than or equal to a second preset threshold; The charging and discharging module is used to stop charging the battery when the state of charge is equal to a third preset threshold, the third preset threshold is greater than or equal to the second preset threshold, and the second preset threshold is greater than or equal to the first preset threshold.

10. An electronic device, characterized in that: include: A processor, and a memory communicatively connected to the processor; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory, so that the processor performs the method according to any one of claims 1 to 8.

Images