Battery formation method, system, device, equipment, medium and vehicle

Abstract

The invention discloses a battery formation method, system, device and equipment, a medium and a vehicle, under the condition that a pipeline mechanism is communicated with the interior of a battery, a plurality of formation steps are sequentially executed on the battery, and each formation step comprises the step of controlling a power supply to charge the battery, in the charging process, the negative pressure mechanism is controlled to extract gas in the battery through the pipeline mechanism, and the positive pressure mechanism is controlled to inflate dry gas into the battery through the pipeline mechanism within the first shelving duration after charging is finished, so that electrolyte in the pipeline mechanism is blown into the battery. According to the embodiment of the invention, the positive pressure mechanism and the negative pressure mechanism share the pipeline mechanism, and the positive pressure mechanism is used for blowing the electrolyte which is extracted by the negative pressure mechanism and is remained in the pipeline mechanism back into the battery, so that the loss of the electrolyte of the battery is reduced, and the pipeline blockage caused by crystallization of the residual electrolyte in the pipeline is avoided.

Description

Technical Field

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

[0002] During the production process of batteries, formation equipment is needed to perform batch formation and activation on the batteries, that is, voltage and current are applied between the positive and negative poles of the batteries to perform electrochemical reactions. Since the electrolyte in the battery will produce gas during the electrochemical reaction, exhaust is required during the battery formation process. At present, the formation process generally adopts negative pressure formation, which achieves exhaust by extracting gas from the electrolyte through negative pressure.

[0003] However, when using negative pressure to extract gas, the extracted bubbles will bring out a certain amount of electrolyte, which will lead to electrolyte loss and cause large battery fluid loss problems. On the other hand, some of the extracted electrolyte will remain in the negative pressure pipeline, causing crystallization and pipeline blockage during long-term use. Summary of the invention

[0004] Embodiments of the present application provide a battery formation method, system, device, equipment, medium and vehicle, which can improve the problems of electrolyte loss and pipeline blockage during battery formation.

[0005] In a first aspect, an embodiment of the present application provides a battery formation method, which is applied to a battery formation system, wherein the battery formation system includes a power supply, a negative pressure mechanism, a positive pressure mechanism, and a pipeline mechanism, wherein both the negative pressure mechanism and the positive pressure mechanism are connected to the interior of the battery through the pipeline mechanism, and the method includes:

[0006] In a case where the conduit mechanism is in communication with the interior of the battery, a plurality of formation steps are sequentially performed on the battery;

[0007] Each formation step includes controlling a power supply to charge the battery, controlling a negative pressure mechanism to extract gas from the battery through a pipeline mechanism during the charging process, and controlling a positive pressure mechanism to fill dry gas into the battery through a pipeline mechanism within a first rest period after the charging is completed, so as to blow the electrolyte in the pipeline mechanism into the battery.

[0008] In a second aspect, an embodiment of the present application provides a battery formation system, including: a power supply, a negative pressure mechanism, a positive pressure mechanism, and a pipeline mechanism;

[0009] The first end of the pipeline mechanism is connected to the negative pressure mechanism and the positive pressure mechanism respectively, and the second end of the pipeline mechanism is connected to the interior of the battery;

[0010] The power supply is used to charge the battery;

[0011] The negative pressure mechanism is used to extract the gas inside the battery through the pipeline mechanism;

[0012] The positive pressure mechanism is used to fill the battery with dry gas through the pipeline mechanism.

[0013] In a third aspect, an embodiment of the present application provides a battery formation control device, which is applied to a battery formation system. The battery formation system includes a power supply, a negative pressure mechanism, a positive pressure mechanism, and a pipeline mechanism. Both the negative pressure mechanism and the positive pressure mechanism are connected to the inside of the battery through the pipeline mechanism. The device includes:

[0014] A formation control module, used to sequentially perform a plurality of formation steps on the battery when the pipeline mechanism is connected to the interior of the battery;

[0015] The formation control module includes:

[0016] A charging unit, used to control the power supply to charge the battery in each formation step;

[0017] A negative pressure exhaust unit is used to control the negative pressure mechanism to extract the gas inside the battery through the pipeline mechanism during the charging process;

[0018] The positive pressure shelf unit is used to control the positive pressure mechanism to fill the battery with dry gas through the pipeline mechanism after charging is completed, so as to blow the electrolyte in the pipeline mechanism into the battery.

[0019] In a fourth aspect, an embodiment of the present application provides an electronic device, the electronic device comprising: a processor and a memory storing computer program instructions;

[0020] When the processor executes the computer program instructions, the steps of the battery formation method according to the first aspect are implemented.

[0021] In a fifth aspect, an embodiment of the present application provides a computer-readable storage medium having computer program instructions stored thereon. When the computer program instructions are executed by a processor, the steps of the battery formation method of the first aspect are implemented.

[0022] In a sixth aspect, an embodiment of the present application provides a vehicle, comprising the electronic device as in the fourth aspect.

[0023] The battery formation method, system, device, equipment, medium and vehicle of the embodiment of the present application, when the pipeline mechanism is connected to the inside of the battery, performs multiple formation steps on the battery in sequence, and each formation step includes controlling the power supply to charge the battery, controlling the negative pressure mechanism to extract the gas inside the battery through the pipeline mechanism during the charging process, and controlling the positive pressure mechanism to fill the battery with dry gas through the pipeline mechanism within the first rest period after the charging is completed, so as to blow the electrolyte in the pipeline mechanism into the battery. According to this embodiment, the positive pressure mechanism and the negative pressure mechanism share the pipeline mechanism, and the electrolyte remaining in the pipeline mechanism extracted by the negative pressure mechanism is blown back into the battery by the positive pressure mechanism, so as to reduce the loss of battery electrolyte and avoid pipeline blockage caused by crystallization of electrolyte remaining in the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solution of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0025] Figure 1 is a schematic diagram of a battery formation system provided by one embodiment of the present application;

[0026] Figure 2 This is a schematic diagram of a battery formation process provided by an embodiment of the present application;

[0027] Figure 3 is a schematic diagram of a battery formation system provided by another embodiment of the present application;

[0028] Figure 4 is a schematic diagram of a battery formation system provided by another embodiment of the present application;

[0029] Figure 5 This is a schematic diagram of the connection positions of an electrolyte buffer device provided in an embodiment of the present application;

[0030] Figure 6 is a schematic diagram of a battery formation system provided by another embodiment of the present application;

[0031] Figure 7 is a schematic diagram of a battery formation process provided by another embodiment of the present application;

[0032] Figure 8 It is a structural schematic diagram of a battery formation device provided in an embodiment of the present application;

[0033] Fig. 9 It is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0034] In order to more clearly understand the above-mentioned objectives, features and advantages of the present disclosure, the scheme of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0035] In the following description, many specific details are set forth to facilitate a full understanding of the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present disclosure, rather than all of the embodiments.

[0036] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0037] Before describing the technical solutions provided by the embodiments of the present application, in order to facilitate the understanding of the embodiments of the present application, the present application first specifically describes the problems existing in the prior art:

[0038] As mentioned above, the inventors of this application have discovered that the prior art generally uses negative pressure extraction to exhaust the battery, but negative pressure extraction usually brings out part of the electrolyte, causing battery fluid loss, and the brought out electrolyte will remain in the pipeline, which is easy to crystallize and cause pipeline blockage.

[0039] At present, in order to avoid pipeline blockage, existing production lines generally adopt the method of disassembling negative pressure pipelines for cleaning or using cleaning tools for cleaning. Considering the actual production of the production line, the general cleaning cycle is 2-3 months. However, this cleaning method, on the one hand, causes the equipment to be shut down during the cleaning of the pipeline, affecting production efficiency. On the other hand, there is a problem that some negative pressure pipelines are blocked by crystals during the cleaning cycle and cannot be cleaned in time. At the same time, when this method is used for cleaning, most of the residual electrolyte on the pipe wall has solidified and crystallized, making it difficult to completely remove it.

[0040] In order to solve the above problems, the embodiments of the present application provide a battery formation method, system, device, equipment, medium and vehicle.

[0041] The battery formation method provided in the embodiment of the present application can be applied to a battery formation system to form a battery.

[0042] See also Figure 1 , is a schematic diagram of the structure of a battery formation system provided in an embodiment of the present application, such as Figure 1 As shown, it includes a power supply 110, a negative pressure mechanism 120, a positive pressure mechanism 130 and a pipeline mechanism 140.

[0043] Among them, the first end of the pipeline mechanism 140 is connected to the negative pressure mechanism 120 and the positive pressure mechanism 130 respectively, and the second end of the pipeline mechanism 140 is connected to the interior of the battery to be formed. In this way, the negative pressure mechanism 120 and the positive pressure mechanism 130 can be connected to the interior of the battery through the pipeline mechanism 140.

[0044] The power supply 110 is used to charge the battery;

[0045] The negative pressure mechanism 120 is used to extract the gas inside the battery through the pipeline mechanism 140;

[0046] The positive pressure mechanism 130 is used to fill the battery with dry gas through the pipeline mechanism 140 .

[0047] like Figure 1 As shown, the negative pressure mechanism 120 may include a negative pressure source 1201 and a negative pressure control valve 1202, and the negative pressure source 1201 is connected to the first end of the pipeline mechanism 140 through the negative pressure control valve 1202, wherein the negative pressure source 1201 may be a vacuum pump, and the negative pressure control valve 1202 is used to control the opening and closing of the negative pressure source 1201, and control the suction volume of the negative pressure source 1201.

[0048] The positive pressure mechanism 130 may include a positive pressure source 1301 and a positive pressure control valve 1302, wherein the positive pressure source 1301 is connected to the first end of the pipeline mechanism 140 through the positive pressure control valve 1302, wherein the positive pressure source 1301 may be a gas source, which may produce dry gas, wherein the dry gas may include nitrogen with a purity of 99.99% or dry air with a humidity of less than 2%, and the positive pressure control valve 1302 is used to control the opening and closing of the positive pressure source 1301, as well as to control the gas output of the positive pressure source 1301.

[0049] Optionally, considering that batteries are usually formed in batches, that is, the battery formation system can form multiple batteries at the same time, in order to save costs, such as Figure 1As shown, the second end of the pipeline mechanism 140 can be connected to the inside of the battery through the second confluence device 1401 and the air guide line 1402. Based on this, when multiple batteries are formed at the same time, the second end of the pipeline structure 140 is connected to one end of the second confluence device, and the second confluence device 1401 is respectively connected to the inside of different batteries through different air guide lines 1402. In this way, the inside of multiple batteries are all connected to the second end of the pipeline mechanism 140 through the second confluence device 1404. Through this arrangement, multiple batteries can be formed simultaneously through one battery formation system.

[0050] In the battery formation system provided in this embodiment, the positive pressure mechanism 130 and the negative pressure mechanism 120 share the pipeline mechanism 140 to be connected to the interior of the battery. In this way, after controlling the negative pressure mechanism 120 to extract the gas inside the battery through the pipeline mechanism 140, the positive pressure mechanism 130 can be further controlled to fill the gas into the battery through the pipeline mechanism 140, thereby blowing the residual electrolyte in the pipeline mechanism 140 into the battery, thereby reducing the loss of electrolyte inside the battery and avoiding pipeline blockage caused by crystallization of electrolyte inside the pipeline mechanism 140.

[0051] based on Figure 1 The battery formation system shown in the embodiment of the present application can include: when the pipeline mechanism 140 is connected to the inside of the battery, a plurality of formation steps are sequentially performed on the battery. The number and execution order of the formation steps to be performed can be set according to actual conditions.

[0052] Each formation step includes: controlling the power supply 110 to charge the battery, controlling the negative pressure mechanism 120 to extract the gas inside the battery through the pipeline mechanism 140 during the charging process, and controlling the positive pressure mechanism 130 to fill the battery with dry gas through the pipeline mechanism 140 within the first rest period after the charging is completed, so as to blow the electrolyte in the pipeline mechanism into the battery.

[0053] Among them, the first suspension time can be set according to actual conditions, for example, it can be 5 minutes, and the embodiment of the present application does not make specific limitations on this.

[0054] In the present embodiment, for each formation step, during the charging process, the negative pressure control valve 1202 can be controlled to open and the positive pressure control valve 1302 can be controlled to close, so as to control the negative pressure mechanism 120 to control the pressure inside the battery at a conventional negative pressure value, which can be set according to actual conditions, for example, it can be set to -50KPa. In this way, the gas produced by the formation of the battery can be extracted during the charging process. Considering that part of the electrolyte will be taken out while the gas is extracted in this process, part of the electrolyte will remain in the pipeline mechanism 140, which may easily cause the loss of electrolyte inside the battery and the problem of pipeline blockage. During the first rest period after each charging is completed, the negative pressure control valve 1202 is controlled to close and the positive pressure control valve 1302 is controlled to open, so as to control the positive pressure mechanism 130 to fill the battery with dry gas. During the inflation process, the electrolyte retained in the pipeline structure 140 can be blown back into the battery, thereby reducing the loss of electrolyte inside the battery and avoiding pipeline blockage.

[0055] As an example, see Figure 2 , is a schematic diagram of a battery formation process provided in an embodiment of the present application, such as Figure 2 As shown, taking the case of sequentially performing three formation steps on a battery as an example, wherein each formation step includes a charging process and a standby process performed after the charging process is completed. For each formation step, the charging process includes charging the battery using a power supply 110, and extracting the gas generated inside the battery during charging using a negative pressure mechanism 120. After charging is completed, before performing the next formation step, dry gas is filled into the battery through the standby process using a positive pressure mechanism 130, thereby blowing the residual electrolyte in the pipeline mechanism 140 back into the battery.

[0056] The battery formation method provided in this embodiment performs a plurality of formation steps on the battery in sequence when the pipeline mechanism is connected to the inside of the battery, and each formation step includes controlling the power supply to charge the battery, controlling the negative pressure mechanism to extract the gas inside the battery through the pipeline mechanism during the charging process, and controlling the positive pressure mechanism to fill the battery with dry gas through the pipeline mechanism within the first rest period after the charging is completed, so as to blow the electrolyte in the pipeline mechanism into the battery. According to this embodiment, the positive pressure mechanism and the negative pressure mechanism share the pipeline mechanism, and the electrolyte remaining in the pipeline mechanism extracted by the negative pressure mechanism is blown back into the battery by the positive pressure mechanism, so as to reduce the loss of battery electrolyte and avoid pipeline blockage caused by crystallization of the electrolyte remaining in the pipeline.

[0057] In some embodiments, if only a small amount of gas is charged into the battery through the positive pressure mechanism 120, it may not be possible to blow all the electrolyte remaining in the pipe mechanism 140 into the battery, resulting in poor effect of blowing out the electrolyte. If a large amount of gas is charged into the battery through the positive pressure mechanism 120, it may cause excessive pressure inside the battery, resulting in battery explosion. In view of this, in order to improve the effect of blowing out the electrolyte, the electrolyte remaining in the pipe mechanism 140 is blown back into the battery as much as possible, while ensuring that the battery does not explode, see Figure 3 The battery formation system provided in the embodiment of the present application may further include a positive pressure gas guide device 310 .

[0058] The positive pressure gas guide device 310 is used to release the gas inside the battery to the external environment of the battery when the internal pressure of the battery is greater than the first pressure value, so as to maintain the internal pressure of the battery at a state less than or equal to the first pressure value.

[0059] The first pressure value can be set according to the pressure bearing capacity of the battery shell during the formation process. For example, for an unrestrained battery, its pressure bearing capacity is usually strong, so the first pressure value can be set to a pressure value below 10KPa, while for a restrained battery, its pressure bearing capacity is usually weak, so the first pressure value can be set to below 0.6MPa.

[0060] As an example, taking the first pressure value as 3 KPa, in the process of controlling the positive pressure mechanism 130 to fill the battery with dry gas through the pipeline mechanism 140, when the pressure value inside the battery reaches 3 KPa, the positive pressure gas guide device 310 can connect the interior of the battery with the external environment, because the interior of the battery is also connected to the pipeline mechanism 140 at this time, thereby realizing the connection between the pipeline mechanism 140 and the external environment. In this way, as the positive pressure mechanism 130 fills the battery with gas, part of the gas inside the battery can be discharged into the external environment through the positive pressure gas guide device 310.

[0061] As an example, Figure 3 As shown, the positive pressure gas guide device 310 may include a gas guide control valve 3101 and a gas guide line 3102, wherein the first end of the gas guide line 3102 is connected to the inside of the battery, the second end of the gas guide line 3102 is connected to the input end of the gas guide control valve 3101, and the output end of the gas guide control valve 3101 is connected to the external environment. Among them, the gas guide line 3102 is used to transmit the gas inside the battery to the gas guide control valve 3101, and the gas guide control valve 3101 can control the gas outlet size of the positive pressure gas guide device 310, which can be combined with the positive pressure control valve 1302 to control the size of the positive pressure setting and the speed of the positive pressure airflow in the pipeline mechanism 140. Through this setting, the gas outlet size of the positive pressure gas guide device 310, the size of the positive pressure setting, and the speed of the positive pressure airflow in the pipeline mechanism 140 can be controlled.

[0062] By providing a positive pressure gas guide device 310, the positive pressure mechanism 130 can continuously fill gas into the battery through the pipeline mechanism 140, so that a continuous positive pressure airflow is maintained in the pipeline mechanism 140. The continuous positive pressure airflow can form a certain thrust on the residual electrolyte retained in the pipeline, and continuously blow it toward the battery side, so as to achieve the purpose of efficient reflux of electrolyte, thereby cleaning the pipeline while reducing the amount of electrolyte loss.

[0063] Accordingly, based on Figure 3 The battery formation system shown, each of the formation steps in the battery formation method provided in the embodiment of the present application may also include:

[0064] During the first standby period, when the pressure inside the battery is greater than the first pressure value, the positive pressure gas guide device 310 is controlled to release the gas inside the battery into the external environment of the battery, so that the pressure inside the battery is maintained at a state less than or equal to the first pressure value.

[0065] In this way, the positive pressure mechanism 130 can continue to inflate the battery during the storage process after the battery is charged, so that a continuous positive pressure airflow is maintained in the pipeline mechanism 140. The continuous positive pressure airflow can form a certain thrust on the residual electrolyte retained in the pipeline, and continuously blow it to the battery side, so as to achieve the purpose of efficient electrolyte reflux, thereby cleaning the pipeline while reducing the amount of electrolyte loss.

[0066] In some embodiments, considering that batteries are usually formed in batches, that is, the battery formation system can form multiple batteries at the same time, the positive pressure gas guide device 310 can also include: a first confluence device.

[0067] The first confluence device is disposed between the air guide control valve 3101 and the air guide pipeline 3102 , and the second end of the air guide pipeline 3102 is connected to the input end of the air guide control valve 3101 through the first confluence device.

[0068] As an example, when multiple batteries are formed simultaneously in the battery formation system, each battery is connected to the first confluence device through its corresponding gas conduit 3102, and is connected to the input end of the gas control valve 3102 through the first confluence device. In this way, multiple batteries can be positively pressure-released simultaneously through one gas control valve 3102, which reduces the cost compared to each battery corresponding to one gas control valve 3102.

[0069] In some embodiments, Figure 4 The battery formation system provided in the embodiment of the present application may further include: an electrolyte buffer device 410 .

[0070] The second end of the pipeline mechanism 140 and the first end of the air guide pipeline in the positive pressure air guide device 310 are both connected to the interior of the battery through the electrolyte buffer device 410.

[0071] The electrolyte buffer device 410 is used to store the electrolyte flowing out from the inside of the battery.

[0072] Optionally, the electrolyte buffer device 410 may be a buffer cup.

[0073] By providing the electrolyte buffer device 410, during the battery charging process, a portion of the electrolyte extracted by the negative pressure mechanism 120 is stored in the electrolyte buffer device 410, and this portion of the electrolyte can flow back into the battery when the battery returns to normal pressure, thereby reducing the loss of electrolyte.

[0074] Accordingly, based on Figure 4 The battery formation system shown in the embodiment of the present application provides a battery formation method, when controlling the negative pressure mechanism to extract the gas inside the battery through the pipeline mechanism during the charging process, it can include:

[0075] During the charging process, the negative pressure mechanism 120 is controlled to evacuate the interior of the battery through the pipeline mechanism 140;

[0076] During the process of evacuating the interior of the battery, the electrolyte extracted from the interior of the battery is stored in the electrolyte buffer device 410 .

[0077] It should be noted that vacuuming the interior of the battery does not mean 100% extraction of all substances inside the battery, but rather means forming a gas space inside the battery with a pressure lower than the standard atmospheric pressure, which refers to a rarefied gas state.

[0078] Through the above method, a portion of the extracted electrolyte is stored in the electrolyte buffer device 410, thereby reducing the waste of electrolyte.

[0079] In some embodiments, after the multiple formation steps of the battery are all completed, the battery can be unloaded. Unloading the battery means disconnecting the connection between the inside of the battery and the pipeline mechanism 140. The multiple formation steps are all completed when the battery is formed. For example, Figure 2 As shown, three formation steps are set during battery formation, and the three formation steps are executed in sequence. After the last formation step, that is, formation step 3, is completed, it is determined that all the multiple formation steps of the battery are completed.

[0080] Before unloading, the battery formation method provided in this embodiment may further perform the following steps:

[0081] The positive pressure mechanism 130 is controlled to fill the battery interior with dry gas through the pipeline mechanism 140 so that the battery interior enters a normal pressure state.

[0082] By restoring the internal pressure of the battery to normal, on the one hand, it is convenient to unload the battery. On the other hand, when the battery enters the normal pressure state, the electrolyte in the electrolyte buffer device can flow back to the interior of the battery, reducing the loss of electrolyte inside the battery.

[0083] In some embodiments, the second end of the pipeline mechanism 140 is connected to the electrolyte buffer device 410 through a first communication position on the electrolyte buffer device 410;

[0084] The first end of the air guide line in the positive pressure air guide device 310 is connected to the electrolyte buffer device 410 through the second connecting position on the electrolyte buffer device 410 .

[0085] The first communication position and the second communication position are different positions, that is, the first communication position is staggered with the second communication position.

[0086] As an example, the electrolyte buffer device 410 is Figure 5 Taking the cache cup shown as an example, the first connection position can be located in the middle position of the upper part of the cache cup, the second connection position can be located in the peripheral position of the upper part of the cache cup, and the lower part of the cache cup is connected to the battery.

[0087] By staggering the first connection position and the second connection position, the electrolyte that is positively pressured and refluxed during storage can flow smoothly to the battery without being brought into the positive pressure gas guide device 310 .

[0088] In some embodiments, if the electrolyte enters the negative pressure mechanism 120, it may cause damage to the negative pressure mechanism 120. Therefore, in order to prevent the electrolyte from entering the negative pressure mechanism 120, see Figure 6 The battery formation system provided in the embodiment of the present application may further include a condensation mechanism 610 .

[0089] The condensing mechanism 610 is disposed at the first end of the pipeline mechanism 140 , and the first end of the pipeline mechanism 140 is connected to the negative pressure mechanism 120 and the positive pressure mechanism 130 respectively through the condensing mechanism 610 .

[0090] The condensation mechanism 610 is used to condense the gas at the first end of the pipeline mechanism 140 and collect the electrolyte obtained by condensation.

[0091] As an example, Figure 6As shown, the condensation mechanism 610 may include a condensation device 6101 and a liquid collecting cup 6102, wherein the condensation device 6101 is used to condense the gas output from the first end of the pipeline mechanism 140, which may be a condenser, and the liquid collecting cup 6102 is used to collect the electrolyte condensed by the condensation device 6101. Based on this, during the charging process, a portion of the electrolyte extracted through the negative pressure mechanism 120 will enter the liquid collecting cup 6102, and this portion of the electrolyte usually cannot flow directly back into the battery.

[0092] Through the above arrangement, the electrolyte can be prevented from entering the negative pressure mechanism 120 , thereby protecting the safety of the negative pressure mechanism 120 .

[0093] Accordingly, based on Figure 6 After the battery formation system shown in the figure completes the battery unloading, that is, after the connection between the inside of the battery and the pipeline mechanism 140 is disconnected, the battery formation method provided in the embodiment of the present application can also perform the following steps:

[0094] The negative pressure mechanism 120 is controlled to perform a vacuum process on the pipeline mechanism 140 , so that the electrolyte in the pipeline mechanism 140 flows into the condensation mechanism 610 .

[0095] Usually, when the battery is formed, the battery is placed in the battery room. Based on this, controlling the negative pressure mechanism 120 to evacuate the pipeline mechanism 140 can be understood as evacuating the battery room. Similar to evacuating the inside of the battery, evacuating the battery room means forming a gas space with a pressure lower than the standard atmospheric pressure in the battery room. In this process, the gas in the battery room will enter the pipeline mechanism 140 through the second end of the pipeline mechanism 140. At this time, a continuous negative pressure airflow is formed in the pipeline structure 140 in the opposite direction of the shelving process. Under the thrust of the continuous negative pressure airflow, the electrolyte remaining in the pipeline mechanism 140 can flow to the first end of the pipeline mechanism 140, so that it can be condensed and recovered by the condensation mechanism 610, thereby further reducing the retention of electrolyte in the pipeline mechanism 140.

[0096] The battery formation method provided in the embodiment of the present application is applied to Figure 6 Taking the battery formation system shown in the figure as an example, the entire battery formation process is explained.

[0097] Take the battery formation process as an example, with three formation steps. Figure 7 , is a schematic diagram of the battery formation process, such as Figure 7As shown, three formation steps are executed in sequence, each formation step includes a charging process and a shelving process. For each formation step, when the shelving process is completed, it is determined that the formation step is completed. When the last formation step among the three formation steps, that is, formation step 3, is completed, it is determined that all formation steps are completed, and then an unloading step is executed. After the unloading step is completed, an idle step is executed.

[0098] Among them, for each formation step, during the charging process, the negative pressure control valve 1201 is controlled to be opened, the positive pressure control valve 1302 is controlled to be closed, and the positive pressure guide valve 3101 is controlled to be closed, so that the pressure value inside the battery is set to a conventional negative pressure value, such as -50KPa. In this way, during the charging process, the battery formation output gas can be extracted through the negative pressure source 1201. After the charging is completed, the shelving process is entered. During the shelving process, the positive pressure control valve 1302 is controlled to be opened, and the negative pressure control valve 1301 is controlled to be closed. , control the positive pressure air guide valve 3101 to open. At this time, when the pressure inside the battery reaches a first pressure value, for example 3KPa, the positive pressure air guide device 310 can connect the pipeline mechanism 140 with the external environment of the battery, so that the pipeline mechanism 140 maintains a continuous positive pressure airflow during the first shelving time. The continuous positive pressure airflow can form a certain thrust on the residual electrolyte retained in the pipeline, and continuously blow it into the battery, so as to achieve the purpose of efficient electrolyte reflux, thereby cleaning the pipeline and reducing the electrolyte loss.

[0099] After all the formation steps are completed, the unloading step is carried out. In the unloading step, the positive pressure control valve 1302 and the positive pressure air valve 3101 are controlled to be opened, and the negative pressure control valve 1202 is controlled to be closed. When the internal pressure of the battery reaches the normal pressure state, that is, when the internal pressure of the battery reaches the normal pressure 0KPa, the positive pressure air valve 3101 is controlled to be closed. Through the unloading step, the pipeline mechanism and the internal pressure of the battery can be restored to normal pressure, which is convenient for the battery to be unloaded and exit the battery formation system.

[0100] After the battery is successfully removed from the battery formation system through the unloading step, the no-load step is performed. In the no-load step, the negative pressure control valve 1202 is controlled to be open, and the positive pressure control valve 1302 and the positive pressure gas guide valve 3101 are controlled to be closed. A high vacuum of -90KPa is set for a second period of time, for example, 5 minutes, to evacuate the pipeline mechanism 140. During the vacuum treatment, the gas between the batteries enters the pipeline mechanism 140 through the electrolyte buffer device 410. At this time, a continuous negative pressure airflow is formed in the pipeline mechanism 140 in the opposite direction to the shelving process. Under the thrust of the continuous negative pressure airflow, the remaining electrolyte on the tube wall can be further drawn to the condensation mechanism 610, thereby further reducing the retention of electrolyte on the tube wall of the pipeline mechanism 140.

[0101] Based on the battery formation method provided in the above embodiment, the present application also provides a specific implementation of a battery formation device. Please refer to the following embodiments.

[0102] See also Figure 8 The battery formation device provided in the embodiment of the present application is applied to a battery formation system, and the battery formation system includes a power supply, a negative pressure mechanism, a positive pressure mechanism and a pipeline mechanism, and the negative pressure mechanism and the positive pressure mechanism are both connected to the inside of the battery through the pipeline mechanism, such as Figure 8 As shown, the device 800 may include the following modules:

[0103] The formation control module 810 is used to sequentially perform a plurality of formation steps on the battery when the pipeline mechanism is connected to the interior of the battery;

[0104] The formation control module 810 includes:

[0105] A charging unit 8101, used to control the power supply to charge the battery in each formation step;

[0106] The negative pressure exhaust unit 8102 is used to control the negative pressure mechanism to extract the gas inside the battery through the pipeline mechanism during the charging process;

[0107] The positive pressure shelf unit 8103 is used to control the positive pressure mechanism to fill the battery with dry gas through the pipeline mechanism after charging is completed, so as to blow the electrolyte in the pipeline mechanism into the battery.

[0108] The battery formation device provided in this embodiment performs a plurality of formation steps on the battery in sequence when the pipeline mechanism is connected to the inside of the battery, and each formation step includes controlling the power supply to charge the battery, controlling the negative pressure mechanism to extract the gas inside the battery through the pipeline mechanism during the charging process, and controlling the positive pressure mechanism to fill the battery with dry gas through the pipeline mechanism within the first rest period after the charging is completed, so as to blow the electrolyte in the pipeline mechanism into the battery. According to this embodiment, the positive pressure mechanism and the negative pressure mechanism share the pipeline mechanism, and the electrolyte remaining in the pipeline mechanism extracted by the negative pressure mechanism is blown back into the battery by the positive pressure mechanism, so as to reduce the loss of battery electrolyte and avoid pipeline blockage caused by crystallization of the electrolyte remaining in the pipeline.

[0109] In some embodiments, the battery formation system further includes a positive pressure gas guide device, and accordingly, the formation control module 810 further includes:

[0110] The discharge unit is used to control the positive pressure gas guide device to discharge the gas inside the battery into the external environment where the battery is located within the first shelf time when the pressure inside the battery is greater than the first pressure value, so as to maintain the pressure inside the battery at the first pressure value.

[0111] In some embodiments, the battery formation system further includes a condensation mechanism, and accordingly, the battery formation device further includes:

[0112] The no-load control module is used to control the negative pressure mechanism to evacuate the pipeline mechanism when the connection between the inside of the battery and the pipeline mechanism is disconnected, so that the electrolyte in the pipeline mechanism flows into the condensation mechanism.

[0113] In some embodiments, the battery formation system further includes an electrolyte buffer device, and the pipeline mechanism is connected to the interior of the battery through the electrolyte buffer device. Accordingly, the negative pressure exhaust unit 8102 is specifically used for:

[0114] During the charging process, the negative pressure mechanism is controlled to evacuate the interior of the battery through the pipeline mechanism;

[0115] During the process of evacuating the interior of the battery, the electrolyte extracted from the interior of the battery is stored in the electrolyte buffer device.

[0116] In some embodiments, the apparatus may further include:

[0117] The unloading control module is used to control the positive pressure mechanism to fill the battery with dry gas through the pipeline mechanism after the multiple formation steps are completed, so that the battery enters a normal pressure state.

[0118] The battery formation device provided in the embodiment of the present application can implement various processes of the battery formation method embodiment. To avoid repetition, they will not be described again here.

[0119] Fig. 9 A schematic diagram of the hardware structure of an electronic device provided in an embodiment of the present application is shown.

[0120] The electronic device may include a processor 1001 and a memory 902 storing computer program instructions.

[0121] Specifically, the processor 901 may include a central processing unit (CPU), or an application specific integrated circuit (ASIC), or may be configured to implement one or more integrated circuits of the embodiments of the present application.

[0122] The memory 902 may include a large capacity memory for data or instructions. For example, but not limitation, the memory 902 may include a hard disk drive (HDD), a floppy disk drive, a flash memory, an optical disk, a magneto-optical disk, a tape, or a universal serial bus (USB) drive or a combination of two or more of these. In appropriate cases, the memory 902 may include a removable or non-removable (or fixed) medium. In appropriate cases, the memory 902 may be inside or outside the integrated gateway disaster recovery device. In a specific embodiment, the memory 902 is a non-volatile solid-state memory. The memory 902 may include a read-only memory (ROM), a random access memory (RAM), a disk storage medium device, an optical storage medium device, a flash memory device, an electrical, optical or other physical / tangible memory storage device. Therefore, generally, the memory 902 includes one or more tangible (non-transitory) computer-readable storage media (e.g., a memory device) encoded with software including computer executable instructions, and when the software is executed (e.g., by one or more processors), it can perform the operations described in any one of the battery formation methods in the above embodiments.

[0123] The processor 901 implements any one of the battery formation methods in the above embodiments by reading and executing computer program instructions stored in the memory 902 .

[0124] In one example, the electronic device may further include a communication interface 903 and a bus 910. Fig. 9 As shown, the processor 901, the memory 902, and the communication interface 903 are connected via a bus 910 and communicate with each other.

[0125] The communication interface 903 is mainly used to implement communication between various modules, devices, units and / or equipment in the embodiments of the present application.

[0126] Bus 910 includes hardware, software or both, and the parts of online data flow billing equipment are coupled to each other. For example, but not limitation, bus may include accelerated graphics port (AGP) or other graphics bus, enhanced industrial standard architecture (EISA) bus, front-end bus (FSB), hypertransport (HT) interconnection, industrial standard architecture (ISA) bus, infinite bandwidth interconnection, low pin count (LPC) bus, memory bus, micro channel architecture (MCA) bus, peripheral component interconnection (PCI) bus, PCI-Express (PCI-X) bus, serial advanced technology attachment (SATA) bus, video electronics standard association local (VLB) bus or other suitable bus or two or more of these combinations. In appropriate cases, bus 910 may include one or more buses. Although the present application embodiment describes and shows a specific bus, the present application considers any suitable bus or interconnection.

[0127] In addition, in combination with the battery formation method in the above embodiments, the present application embodiment can provide a computer storage medium for implementation. The computer storage medium stores computer program instructions; when the computer program instructions are executed by a processor, any one of the battery formation methods in the above embodiments is implemented.

[0128] In addition, in combination with the battery formation method in the above embodiment, the embodiment of the present application can provide a vehicle for implementation. The vehicle includes an electronic device; the electronic device includes: a processor and a memory storing computer program instructions; when the processor executes the computer program instructions, any one of the battery formation methods in the above embodiment is implemented.

[0129] It should be clear that the present application is not limited to the specific configuration and processing described above and shown in the figures. For the sake of simplicity, a detailed description of the known method is omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method process of the present application is not limited to the specific steps described and shown, and those skilled in the art can make various changes, modifications and additions, or change the order between the steps after understanding the spirit of the present application.

[0130] The functional blocks shown in the above-described block diagram can be implemented as hardware, software, firmware or a combination thereof. When implemented in hardware, it can be, for example, an electronic circuit, an application specific integrated circuit (ASIC), appropriate firmware, a plug-in, a function card, etc. When implemented in software, the elements of the present application are programs or code segments that are used to perform the required tasks. The program or code segment can be stored in a machine-readable medium, or transmitted on a transmission medium or a communication link by a data signal carried in a carrier wave. "Machine-readable medium" can include any medium capable of storing or transmitting information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, optical fiber media, radio frequency (RF) links, etc. The code segment can be downloaded via a computer network such as the Internet, an intranet, etc.

[0131] It should also be noted that the exemplary embodiments mentioned in this application describe some methods or systems based on a series of steps or devices. However, this application is not limited to the order of the above steps, that is, the steps can be performed in the order mentioned in the embodiment, or in a different order from the embodiment, or several steps can be performed simultaneously.

[0132] Aspects of the present disclosure are described above with reference to the flowchart and / or block diagram of the method, device (system) and computer program product according to the embodiment of the present disclosure. It should be understood that each box in the flowchart and / or block diagram and the combination of each box in the flowchart and / or block diagram can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device to produce a machine so that these instructions executed by the processor of the computer or other programmable data processing device enable the implementation of the function / action specified in one or more boxes of the flowchart and / or block diagram. Such a processor can be, but is not limited to, a general-purpose processor, a special-purpose processor, a special application processor, or a field programmable logic circuit. It can also be understood that each box in the block diagram and / or flowchart and the combination of boxes in the block diagram and / or flowchart can also be implemented by dedicated hardware that performs a specified function or action, or can be implemented by a combination of dedicated hardware and computer instructions.

[0133] The above is only a specific implementation of the present application. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, modules and units described above can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here. It should be understood that the protection scope of the present application is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in this application, and these modifications or replacements should be included in the protection scope of this application.

Claims

1. A battery formation method, characterized in that: Applied to a battery formation system, the battery formation system comprises a power source, a negative pressure mechanism, a positive pressure mechanism and a pipeline mechanism, the negative pressure mechanism and the positive pressure mechanism are both connected to the interior of the battery through the pipeline mechanism, and the method comprises: In a case where the pipeline mechanism is in communication with the interior of the battery, sequentially performing a plurality of formation steps on the battery; Each of the formation steps includes controlling the power supply to charge the battery, controlling the negative pressure mechanism to extract gas from the battery through the pipeline mechanism during the charging process, and controlling the positive pressure mechanism to fill dry gas into the battery through the pipeline mechanism within a first rest period after the charging is completed, so as to blow the electrolyte in the pipeline mechanism into the battery.

2. The method according to claim 1, characterized in that The battery formation system further includes a positive pressure gas guide device, and the formation step further includes: During the first standby period, when the pressure inside the battery is greater than a first pressure value, the positive pressure gas guide device is controlled to discharge the gas inside the battery into the external environment where the battery is located, so that the pressure inside the battery is maintained at a state less than and equal to the first pressure value.

3. The method according to claim 2, characterized in that The battery formation system further includes a condensation mechanism, and the method further includes: When the connection between the interior of the battery and the pipeline mechanism is disconnected, the negative pressure mechanism is controlled to perform a vacuum process on the pipeline mechanism so that the electrolyte in the pipeline mechanism flows into the condensation mechanism.

4. The method according to claim 1, characterized in that: The battery formation system further includes an electrolyte buffer device, the pipeline mechanism is connected to the interior of the battery through the electrolyte buffer device, and the negative pressure mechanism is controlled to extract gas from the interior of the battery through the pipeline mechanism during the charging process, including: During the charging process, controlling the negative pressure mechanism to perform vacuum treatment on the interior of the battery through the pipeline mechanism; During the process of vacuuming the interior of the battery, the electrolyte extracted from the interior of the battery is stored in the electrolyte buffer device.

5. The method according to any one of claims 1 to 4, characterized in that: After the plurality of formation steps are completed, the method further comprises: The positive pressure mechanism is controlled to fill the battery with dry gas through the pipeline mechanism, so that the battery interior enters a normal pressure state.

6. A battery formation system, characterized in that: include: Power supply, negative pressure mechanism, positive pressure mechanism and pipeline mechanism; The first end of the pipeline mechanism is connected to the negative pressure mechanism and the positive pressure mechanism respectively, and the second end of the pipeline mechanism is connected to the interior of the battery; The power supply is used to charge the battery; The negative pressure mechanism is used to extract the gas inside the battery through the pipeline mechanism; The positive pressure mechanism is used to fill the battery with dry gas through the pipeline mechanism.

7. The system according to claim 6, characterized in that The battery replacement system further includes: a positive pressure air guide device; The positive pressure gas guide device is used to release the gas inside the battery into the external environment of the battery when the pressure inside the battery is greater than a first pressure value, so as to maintain the pressure inside the battery at a state less than or equal to the first pressure value.

8. The system according to claim 7, characterized in that The positive pressure air guide device comprises: Gas control valve and gas pipeline; The first end of the air guide line is in communication with the interior of the battery, and the second end of the air guide line is connected to the input end of the air guide control valve; The output end of the air guide control valve is in communication with the external environment.

9. The system according to claim 7, characterized in that The positive pressure air guide device further comprises: a first confluence device; The first confluence device is disposed between the air guide control valve and the air guide pipeline, and the second end of the air guide pipeline is connected to the input end of the air guide control valve through the first confluence device.

10. The system according to claim 7 or 8, characterized in that: The battery formation system also includes an electrolyte buffer device; The second end of the pipeline mechanism and the first end of the air guide pipeline are both connected to the interior of the battery through the electrolyte buffer device; The electrolyte buffer device is used to store the electrolyte flowing out from the inside of the battery.

11. The system according to claim 10, characterized in that The second end of the pipeline mechanism is connected to the electrolyte buffer device through a first communication position on the electrolyte buffer device; The first end of the air guide line is connected to the electrolyte buffer device through a second communication position on the electrolyte buffer device; The first communication position and the second communication position are different positions.

12. The system according to any one of claims 6 to 9, characterized in that: The battery formation system also includes a condensation mechanism; The first end of the pipeline mechanism is connected to the negative pressure mechanism and the positive pressure mechanism respectively through the condensation mechanism; The condensing mechanism is used to condense the gas at the first end of the pipeline mechanism and to collect the electrolyte obtained by condensation.

13. A battery formation control device, characterized in that: Applied to a battery formation system, the battery formation system comprises a power source, a negative pressure mechanism, a positive pressure mechanism and a pipeline mechanism, the negative pressure mechanism and the positive pressure mechanism are both connected to the inside of the battery through the pipeline mechanism, and the device comprises: a formation control module, used to sequentially perform a plurality of formation steps on the battery when the pipeline mechanism is in communication with the interior of the battery; The formation control module comprises: A charging unit, used for controlling the power supply to charge the battery in each formation step; A negative pressure exhaust unit, used to control the negative pressure mechanism to extract gas inside the battery through the pipeline mechanism during charging; The positive pressure shelf unit is used to control the positive pressure mechanism to fill the battery with dry gas through the pipeline mechanism after charging is completed, so as to blow the electrolyte in the pipeline mechanism into the battery.

14. An electronic device, characterized in that: The electronic device comprises: a processor and a memory storing computer program instructions; When the processor executes the computer program instructions, the steps of the battery formation method according to any one of claims 1 to 5 are implemented.

15. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer program instructions, and when the computer program instructions are executed by a processor, the steps of the battery formation method according to any one of claims 1 to 5 are implemented.

16. A vehicle, characterized in that: Comprising the electronic device as claimed in claim 14.

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