Formation method and system of lithium ion battery, electronic equipment and storage medium

Abstract

The application relates to the technical field of lithium ion batteries, and particularly provides a formation method and system of a lithium ion battery, electronic equipment and a storage medium, the formation method of the lithium ion battery comprising the following steps: performing a charge / discharge task on the lithium ion battery; wherein during the execution of the charge / discharge task, the lithium ion battery is oscillated in a first direction at a preset frequency, the first direction is perpendicular to the direction of the main body of the lithium ion battery, and the preset frequency is a characteristic frequency of lithium ion transmission in electrolyte; and / or during the execution of the charge / discharge task, the lithium ion battery is reciprocally moved in a second direction, wherein the second direction is the width direction of the lithium ion battery. In the foregoing manner, the consistency of the formed SEI film can be improved.

Description

Technical Field

[0001] This invention relates to the field of lithium-ion battery technology, and more particularly to lithium-ion battery formation methods, systems, electronic devices, and storage media. Background Technology

[0002] In the current lithium-ion battery production process, formation is a crucial step. During formation, an electric current is applied to the lithium-ion battery, performing a charge / discharge process. This process promotes the decomposition of the electrolyte on the negative electrode surface, forming a solid electrolyte interphase (SEI) layer, hereinafter referred to as the SEI film. The SEI film plays a vital role in conducting lithium ions and protecting the negative electrode, significantly influencing the battery's electrochemical performance.

[0003] However, the SEI film formed through the current formation process may suffer from poor consistency, potentially negatively impacting the durability and safety of lithium-ion batteries. Furthermore, with the increasing demand for higher energy density battery systems, lithium-ion battery anode materials are shifting from graphite to materials with higher specific capacity, such as silicon-carbon, silicon-oxygen, pure silicon, metallic lithium, and mixtures of these materials with graphite. However, these higher specific capacity materials are characterized by high activity and significant volume expansion. Compared to lithium-ion batteries using graphite as the anode material, the higher energy density lithium-ion batteries required for future development face a greater risk of lithium plating, further placing higher demands on the consistency of the SEI film.

[0004] Therefore, improving the consistency of the SEI film formed by the formation process to enhance the performance of lithium-ion batteries has become an urgent problem to be solved. Summary of the Invention

[0005] In view of this, the present invention provides a method, system, electronic device and storage medium for the formation of lithium-ion batteries, which can improve the uniformity of the formed SEI film.

[0006] To address the aforementioned technical problems, the present invention provides a method for forming a lithium-ion battery, comprising: performing a charging / discharging task on the lithium-ion battery; wherein during the execution of the charging / discharging task, the lithium-ion battery is oscillated at a preset frequency in a first direction, the first direction being a direction perpendicular to the main body of the lithium-ion battery, and the preset frequency being a characteristic frequency of lithium ion transport in the electrolyte; and / or during the execution of the charging / discharging task, the lithium-ion battery is reciprocated in a second direction, wherein the second direction is the width direction of the lithium-ion battery.

[0007] During the charging / discharging process, applying oscillation at a preset frequency in a first direction and / or reciprocating movement of the lithium-ion battery in a second direction can effectively improve the uniformity of the formed SEI film. On one hand, applying oscillation at a preset frequency in the first direction promotes resonance of lithium ions transported in the electrolyte, resulting in uniform and rapid lithium ion transport. This promotes a consistent electrolyte reaction process on the negative electrode surface, thereby improving the uniformity of the formed SEI film. On the other hand, reciprocating movement of the lithium-ion battery in the second direction effectively addresses electrolyte vacancies, promoting sufficient electrolyte wetting and further improving the uniformity of the formed SEI film. Improving SEI film uniformity avoids various interface problems in lithium-ion batteries caused by poor SEI film uniformity, thus enhancing battery performance. Simultaneously, it meets the technical requirements of high-energy-density battery systems, tolerates more active negative electrode materials, and further provides prerequisites for the development of lithium-ion batteries towards higher energy density and greater charging rates.

[0008] According to some embodiments of the present invention, a gas bag is provided on one side of the lithium-ion battery in the width direction, and the gas bag is used to store the gas generated by the lithium-ion battery during charging / discharging.

[0009] According to some embodiments of the present invention, after the charging / discharging task is completed, the gas stored in the gas bag is released and the lithium-ion battery is repackaged.

[0010] According to some embodiments of the present invention, during the execution of a charging / discharging task, the steps of oscillating the lithium-ion battery at a preset frequency in a first direction and reciprocating the lithium-ion battery in a second direction include: during the execution of a charging / discharging task, oscillating the lithium-ion battery at a preset frequency in a first direction while reciprocating the lithium-ion battery in a second direction.

[0011] According to some embodiments of the present invention, during the execution of a charging / discharging task, the steps of oscillating the lithium-ion battery at a preset frequency in a first direction and reciprocating the lithium-ion battery in a second direction include: during the execution of the charging / discharging task, oscillating the lithium-ion battery at a preset frequency in the first direction for a first preset time and reciprocating the lithium-ion battery in the second direction for a second preset time.

[0012] By applying oscillation at a preset frequency in a first direction and reciprocating movement of the lithium-ion battery in a second direction during the charging / discharging process, the following effects are achieved. Firstly, applying oscillation at the preset frequency in the first direction promotes resonance of lithium ions transported in the electrolyte, resulting in uniform and rapid transport of lithium ions within the electrolyte. This promotes a more consistent electrolyte reaction process on the negative electrode surface, improving the uniformity of the SEI film. Secondly, reciprocating movement of the lithium-ion battery in the second direction effectively addresses electrolyte vacancies, promoting sufficient electrolyte wetting and further enhancing the uniformity of the SEI film. In this embodiment, the synergistic effect of oscillation and reciprocating movement enhances SEI film uniformity, resulting in a synergistic effect and a more uniform SEI film.

[0013] According to some embodiments of the present invention, performing a charge / discharge task on a lithium-ion battery includes: setting charging parameters, wherein the charging parameters include charging current, charging time, temperature and pressure; and initiating the charge / discharge task on the lithium-ion battery.

[0014] According to some embodiments of the present invention, the charging parameters include the charging parameters corresponding to each round of charging / discharging operation in the charging / discharging task, and the charging parameters corresponding to each round of charging / discharging operation are different.

[0015] By providing different currents, temperatures, and pressures for different stages of the charge / discharge task, the most suitable formation environment can be provided for the electrolyte decomposition process in each charge / discharge operation, thereby improving the quality of the formed SEI film.

[0016] According to some embodiments of the present invention, performing a charge / discharge task on a lithium-ion battery includes: injecting electrolyte into the lithium-ion battery, allowing it to stand for a third preset time, and then initiating the charge / discharge task on the lithium-ion battery.

[0017] By allowing the electrolyte to stand for a third preset time after injection, the wetting degree of the electrolyte can be improved to some extent before the charging / discharging task.

[0018] In a second aspect, embodiments of the present invention provide a lithium-ion battery formation system, comprising:

[0019] A charging / discharging device, connected to the positive and negative terminals of a lithium-ion battery, is used to charge / discharge the lithium-ion battery to perform charging / discharging tasks.

[0020] A vibration application component is used to clamp a lithium-ion battery and, during the execution of a charging / discharging task, to carry the lithium-ion battery to oscillate at a preset frequency in a first direction and / or to reciprocate in a second direction; wherein the first direction is perpendicular to the lithium-ion battery body, the second direction is the width direction of the lithium-ion battery, and the preset frequency is the characteristic frequency of lithium ion transmission in the electrolyte.

[0021] According to some embodiments of the present invention, the vibration application component includes:

[0022] A clamp used to hold lithium-ion batteries.

[0023] The vibration control unit is connected to the clamp and is used to control the clamp's oscillation or reciprocating movement.

[0024] According to some embodiments of the present invention, the clamp comprises two parallel clamping plates.

[0025] Thirdly, embodiments of the present invention provide an electronic device, including: a processor; and a memory, wherein computer program instructions are stored in the memory.

[0026] Specifically, when computer program instructions are executed by the processor, the processor performs a lithium-ion battery formation method as described above.

[0027] Fourthly, embodiments of the present invention provide a computer-readable storage medium storing a computer program, which, when executed by a processor, causes the processor to perform a lithium-ion battery formation method as described above. Attached Figure Description

[0028] Figure 1a This is a schematic diagram of the lithium plating phenomenon;

[0029] Figure 1b A schematic diagram of lithium dendrites;

[0030] Figure 1c This is a schematic diagram of lithium-ion battery burnout.

[0031] Figure 2 This is a schematic diagram of an embodiment of applying adhesive to a lithium-ion battery;

[0032] Figure 3 This is a schematic diagram of the formation system of a lithium-ion battery according to an embodiment of the present invention;

[0033] Figure 4 This is a schematic diagram of the formation system of a lithium-ion battery according to an embodiment of the present invention;

[0034] Figure 5 This is a schematic diagram of the formation system of a lithium-ion battery according to an embodiment of the present invention;

[0035] Figure 6a This is a schematic diagram of a lithium-ion battery with a square cross-section held by a clamp according to an embodiment of the present invention;

[0036] Figure 6b This is a schematic diagram of a lithium-ion battery with a cross-section resembling an ellipse, according to an embodiment of the present invention.

[0037] Figure 6c This is a schematic diagram of a lithium-ion battery with a cross-section resembling a perfect circle according to an embodiment of the present invention;

[0038] Figure 6d This is a schematic diagram of a cylindrical lithium-ion battery held by a clamp according to an embodiment of the present invention;

[0039] Figure 7 This is a schematic diagram of a lithium-ion battery with an air bag according to an embodiment of the present invention;

[0040] Figure 8a This is a flowchart of a lithium-ion battery formation method according to an embodiment of the present invention;

[0041] Figure 8b This is a flowchart of a lithium-ion battery formation method according to another embodiment of the present invention;

[0042] Figure 8c This is a flowchart of a lithium-ion battery formation method according to another embodiment of the present invention;

[0043] Figure 9 This is a schematic diagram of the formation and pre- and post-process flow of a lithium-ion battery according to an embodiment of the present invention.

[0044] Figure 10a This is a schematic diagram of the uniform distribution of lithium ions on the negative electrode surface in the formation method of a lithium-ion battery according to an embodiment of the present invention.

[0045] Figure 10b This is a comparison graph of negative electrode overpotential-time obtained from comparative testing in an embodiment of the present invention;

[0046] Figure 11 This is a schematic diagram of an electronic device according to an embodiment of the present invention. Detailed Implementation

[0047] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0048] Lithium-ion batteries are a general term for batteries that use lithium-ion intercalation compounds as the positive electrode material. They are a type of rechargeable battery that primarily functions by the movement of lithium ions (Li+) between the positive and negative electrodes. Specifically, lithium-ion batteries can be packaged in various ways, including pouch batteries and hard-case batteries. Hard-case batteries can be further divided into prismatic and cylindrical lithium-ion batteries. The following embodiments and accompanying drawings are merely illustrative of the formation method of lithium-ion batteries using pouch batteries as an example; this application does not limit the packaging type of lithium-ion batteries.

[0049] Lithium-ion batteries use carbon materials (usually graphite) as the negative electrode and lithium-containing compounds as the positive electrode. When a lithium-ion battery is charged, lithium ions are generated at the positive electrode and then move through the electrolyte to the negative electrode. The carbon used as the negative electrode has a layered structure; the lithium ions that reach the negative electrode are intercalated between the carbon layers. The more lithium ions intercalated, the higher the charging capacity. Similarly, when a lithium-ion battery is discharged, the lithium ions intercalated in the carbon layers of the negative electrode are released and move back to the positive electrode. The more lithium ions returning to the positive electrode, the higher the discharge capacity.

[0050] The manufacturing process of lithium-ion batteries can be broadly divided into three stages: electrode fabrication, cell fabrication, and battery assembly. Electrode fabrication includes processes such as mixing, coating, rolling, slitting, and tab welding; this process is fundamental to ensuring the performance of lithium-ion batteries. Cell fabrication mainly includes processes such as winding or stacking, casing, electrolyte injection, vacuuming, and final sealing. Battery assembly mainly includes processes such as formation, capacity testing, assembly, and testing. The specific manufacturing process can be adapted to actual needs and the packaging shape of the lithium-ion battery, and is not limited here.

[0051] In the production process of lithium-ion batteries, formation is a crucial step. During formation, applying current to the lithium-ion battery, i.e., performing a charge / discharge cycle, promotes the decomposition of the electrolyte on the negative electrode surface, forming an electrolyte interphase (SEI) film. The SEI film serves to conduct lithium ions and protect the negative electrode, significantly influencing the battery's electrochemical performance. The electrolyte is typically an organic solvent, while the SEI film is usually composed of inorganic lithium salts and organic matter. The SEI film is insoluble in organic solvents and can exist stably in the electrolyte. Solvent molecules in the electrolyte cannot pass through the SEI film, effectively preventing co-intercalation of solvent molecules and avoiding damage to the electrode materials caused by co-intercalation. Simultaneously, as an excellent conductor of lithium ions, the SEI film ensures the free intercalation and deintercalation of lithium ions. Therefore, the formation of the SEI film greatly improves the cycle performance and lifespan of lithium-ion batteries.

[0052] The SEI film formed after the formation process may have poor consistency. "Poor SEI film consistency" refers to the non-uniformity of the SEI film formed on the negative electrode surface of the lithium-ion battery, which may include non-uniformity in the spatial thickness of the SEI film or non-uniformity in the chemical composition of the SEI film.

[0053] Poor consistency of the SEI film can adversely affect the durability and safety of lithium-ion batteries. Moreover, a poorly consistent SEI film conducts lithium ions slowly, and after subsequent charge / discharge cycles, various interface problems such as insufficient lithium intercalation or lithium plating are likely to occur on the negative electrode surface, thereby affecting battery capacity and even posing safety risks.

[0054] First, poor uniformity of the SEI film may affect the lithium-ion flux distribution. For example... Figures 1a-1b As shown, lithium metal deposition (i.e., lithium plating) is easily triggered at the negative electrode surface where lithium-ion conductivity is low (e.g., ...). Figure 1a As shown), lithium dendrites of metallic lithium are formed on the surface of the negative electrode (e.g., Figure 1b (As shown). Lithium plating can cause localized expansion of the negative electrode surface, leading to an increase in the temperature of the lithium-ion battery and consequently triggering a series of safety risks, such as... Figure 1c The lithium-ion battery shown exhibits localized burn-out. Furthermore, as the negative electrode surface gradually expands during charging / discharging, thinner sections of the SEI film are prone to rupture, exposing fresh negative electrode active material. This leads to further decomposition of the electrolyte, resulting in battery capacity loss and significantly impacting battery performance.

[0055] Secondly, with the increasing demand for higher energy density battery systems, lithium-ion battery anode materials are shifting from graphite to materials with higher specific capacity, such as silicon-carbon, silicon-oxygen, pure silicon, metallic lithium, and mixtures of these materials with graphite. However, these higher specific capacity materials all exhibit high activity and large volume expansion. Compared to lithium-ion batteries using graphite as the anode material, the higher energy density lithium-ion batteries required for future development face a greater risk of lithium plating, further placing higher demands on the consistency of the SEI film.

[0056] Therefore, improving the consistency of the SEI film formed by the formation process to enhance the performance of lithium-ion batteries has become an urgent problem to be solved.

[0057] The applicant, through extensive research, discovered the following factors affecting the consistency of the SEI film:

[0058] Firstly, during the formation of lithium-ion batteries, as charging / discharging proceeds, while an SEI film forms on the negative electrode surface, the reaction between the electrolyte and the negative electrode material causes electrolyte decomposition, generating hydrocarbon gases. On one hand, insufficient electrolyte wetting at localized areas of the negative electrode where gas is generated leads to incomplete electrolyte decomposition products, resulting in uneven spatial distribution and insufficient chemical composition of the SEI film formed on the negative electrode surface. On the other hand, during electrode fabrication, to weld the tabs, avoid electrode burrs, and ensure that the negative electrode is larger than the positive electrode in both length and width, adhesives (such as...) are applied to the lithium-ion battery cell. Figure 2 The image shows adhesive applied to the bottom and top of the lithium-ion battery. However, this can lead to inconsistent thickness uniformity across the entire electrode area.

[0059] Secondly, during the formation process of lithium-ion batteries, a formation fixture is typically used to apply pressure to the lithium-ion battery to expel the generated hydrocarbon gases. At this time, due to inconsistent electrode thickness and external pressure, the liquid phase transport distance of lithium ions ("liquid phase transport" refers to the transport of lithium ions in the electrolyte) may be uneven. This results in inconsistent electrolyte reaction processes occurring on the negative electrode surface, leading to uneven spatial distribution and insufficient chemical composition of the SEI film formed on the negative electrode surface.

[0060] Therefore, in order to solve the above-mentioned technical problems, this application proposes a lithium-ion battery formation method and a lithium-ion battery formation system for implementing the lithium-ion battery formation method proposed in this application. It is worth noting that this application proposes a lithium-ion battery formation system and method, wherein "lithium-ion battery" refers to a lithium-ion battery in the formation stage, or the cell portion of a lithium-ion battery, and not a finished lithium-ion battery product that can be directly used.

[0061] The lithium-ion battery formation method in this application includes: performing a charging / discharging task on the lithium-ion battery. During the execution of the charging / discharging task, the lithium-ion battery is oscillated at a preset frequency in a first direction; and / or the lithium-ion battery is reciprocated in a second direction during the execution of the charging / discharging task. The first direction is perpendicular to the main body of the lithium-ion battery, the preset frequency is the characteristic frequency of lithium-ion transport in the electrolyte, and the second direction is the width direction of the lithium-ion battery.

[0062] By oscillating the lithium-ion battery at a preset frequency in a first direction and / or reciprocating it in a second direction during the charging / discharging process, the uniformity of the formed SEI film can be effectively improved. On one hand, applying oscillation at a preset frequency in the first direction promotes the resonance of lithium ions transported in the electrolyte, resulting in uniform and rapid lithium ion transport. This promotes a consistent electrolyte reaction process on the negative electrode surface, thereby improving the uniformity of the formed SEI film. On the other hand, reciprocating it in the second direction effectively addresses electrolyte vacancies, promoting sufficient electrolyte wetting and further improving the uniformity of the formed SEI film. Improving SEI film uniformity avoids various interface problems in lithium-ion batteries caused by poor SEI film uniformity, thus enhancing battery performance. Simultaneously, it meets the technical requirements of high-energy-density battery systems, tolerates more active negative electrode materials, and further provides prerequisites for the development of lithium-ion batteries towards higher energy density and greater charging rates.

[0063] The hardware configuration of the formation system according to the embodiments of this application will be described below.

[0064] like Figure 3 As shown, the lithium-ion battery formation system 10 includes a charging / discharging device 11 and a vibration application component 12. The charging / discharging device 11 is connected to the positive and negative terminals of the lithium-ion battery 100 and is used to charge / discharge the lithium-ion battery 100 to perform a charging / discharging task. The vibration application component 12 is used to hold the lithium-ion battery 100 and, during the execution of the charging / discharging task, carries the lithium-ion battery 100 to oscillate in a specific direction at a preset frequency, and / or reciprocates in another specific direction.

[0065] The lithium-ion battery formation system 10 in this embodiment, by implementing the lithium-ion battery formation method proposed in this application embodiment, can apply oscillation at a preset frequency in a specific direction and / or reciprocate movement of the lithium-ion battery 100 in another specific direction to the lithium-ion battery 100 during the execution of the charging / discharging task, thereby effectively improving the consistency of the formed SEI film.

[0066] In one embodiment, such as Figure 4 As shown, the vibration application component 12 may include a clamp 121 and a vibration control unit 122. The clamp 121 is used to hold the lithium-ion battery 100. The vibration control unit 122 is connected to the clamp 121 and is used to control the clamp 121 to oscillate or reciprocate. In one embodiment, the aforementioned "specific direction" may be as follows: Figure 4 The first direction X1, as indicated in the diagram, is perpendicular to the main body of the lithium-ion battery 100. "Another specific direction" could be, for example... Figure 4 The second direction X2, as indicated in the diagram, refers to the width direction of the lithium-ion battery 100. In one embodiment, the clamp 121 may include two parallel clamping plates, such as... Figure 4 As shown, by clamping the lithium-ion battery 100 with two parallel clamping plates, it is possible to ensure that the surface of the lithium-ion battery 100 is subjected to balanced forces, thereby further ensuring the effect of improving the consistency of the SEI film.

[0067] Understandably, in other embodiments, the clamp 121 may also be other structures such as clamps or suction cups, which are not limited here.

[0068] In one embodiment, such as Figure 5 As shown, multiple lithium-ion batteries 100 to be formed can be placed together in one formation cabinet. Figure 5 (Taking a formation cabinet containing three lithium-ion batteries 100 as an example). The charging / discharging device 11 in the lithium-ion battery formation system 10 can be connected to each lithium-ion battery 100 to be formed in the formation cabinet, and the vibration control unit 122 can be connected to the fixture 121 corresponding to each lithium-ion battery 100 in the formation cabinet. This allows for simultaneous formation of all lithium-ion batteries 100, improving the mass production formation efficiency of the lithium-ion batteries 100.

[0069] The vibration control unit 122 can control the type of vibration (oscillation and / or reciprocating movement, etc.), direction of vibration, and duration of vibration (vibration start time, stop time, or duration, etc.) applied to the lithium-ion battery 100. The vibration control unit 122 can also control the simultaneous application of oscillation and reciprocating movement at a preset frequency to the lithium-ion battery 100, or the sequential application of oscillation and reciprocating movement at preset frequencies. Understandably, the specific vibration type, direction, and duration can be set according to actual needs and are not limited here.

[0070] In other embodiments, the lithium-ion battery formation system 10 may also be equipped with multiple charging / discharging devices 11, each of which can individually perform charging / discharging tasks on the corresponding lithium-ion battery 100 in the formation cabinet. Performing a charging / discharging task on the lithium-ion battery may include setting charging parameters and then initiating the charging / discharging task. The charging parameters include charging current, charging time, temperature, and pressure. The charging / discharging device 11 can regulate the reaction type and depth of electrolyte decomposition by adjusting the charging parameters in the charging / discharging task, thereby adjusting the structure and material composition of the formed SEI film. The details of setting the charging parameters are explained in the following embodiments and will not be elaborated here.

[0071] Understandably, the specific number, connection method, and charging parameters of the lithium-ion batteries 100 in the charging / discharging device 11 and the formation cabinet can be set according to actual needs, and are not limited here.

[0072] The formation method of lithium-ion batteries in the embodiments of this application will be described in detail below with reference to specific implementation methods and accompanying drawings.

[0073] The lithium-ion battery formation method in this application embodiment includes: performing a charging / discharging task on the lithium-ion battery. During the execution of the charging / discharging task, the lithium-ion battery is oscillated at a preset frequency in a first direction, and / or the lithium-ion battery is reciprocated in a second direction during the execution of the charging / discharging task. The first direction is perpendicular to the main body of the lithium-ion battery, the preset frequency is the characteristic frequency of lithium-ion transport in the electrolyte, and the second direction is the width direction of the lithium-ion battery.

[0074] The characteristic frequency of lithium ion transport in the electrolyte is generally in the range of 1Hz to 100Hz, and the preset frequency can generally be set to around 10Hz. By applying oscillation at the characteristic frequency of lithium ion transport in the electrolyte to the lithium-ion battery, resonance with the lithium ions can be achieved, thereby promoting the uniform transport of lithium ions in the electrolyte and improving the consistency of the formed SEI film.

[0075] like Figure 6a As shown, Figure 6a This is a schematic diagram of a lithium-ion battery 100 held in place by a clamp 121. The first direction is perpendicular to the main body of the lithium-ion battery 100, as shown below. Figure 6a The X1 direction indicated in the text, or in other words, in the direction indicated in the text, is the direction indicated in the text. Figure 6a In the case of a battery with a square cross-section (such as a pouch lithium-ion battery or a square lithium-ion battery), the first direction is perpendicular to the surface of the lithium-ion battery 100 body. The second direction is the width direction of the lithium-ion battery 100, such as... Figure 6a The X2 direction indicated in the text, or in other words, in the direction indicated in the text, is the direction indicated in the text. Figure 6a In the case of a battery with a square cross-section, the second direction is along the width of the plane containing the lithium-ion battery 100. For example... Figure 6a As shown, the clamping force of the clamp is applied in the same direction as the X1 direction. In the plane perpendicular to the direction of the clamping force, the battery does not move significantly along the same direction as the line connecting the geometric center of the battery and the electrode placement position to prevent the wiring stability from deteriorating. Therefore, the battery will move in the X2 direction, which is perpendicular to the aforementioned line direction and is the width direction of the battery.

[0076] The following is a brief description: Figure 6b and 6cExemplary illustration of the X1 and X2 directions in the case of a battery with an anisotropic cross-section. Figure 6b and 6c Only a cross-sectional view of the battery is shown; its perspective view and clamping position are essentially the same as those shown. Figure 6a Consistent. For example... Figure 6b As shown, in the case of a battery with a cross-section similar to an ellipse, the width direction of the battery is as follows: Figure 6b The X2 direction, as indicated, is the second direction that aligns with the width of the battery. The first direction is perpendicular to the battery body, such as... Figure 6b The X1 direction is indicated in the diagram.

[0077] like Figure 6c As shown, in the case of a battery with a cross-section similar to a perfect circle, the width direction of the battery is as follows: Figure 6c The X2 direction, as indicated, is the second direction that aligns with the width of the battery. The first direction is perpendicular to the battery body, such as... Figure 6c The X1 direction is indicated in the diagram.

[0078] like Figure 6d As shown, in the case of cylindrical or non-circular cross-section quasi-cylindrical lithium-ion batteries, the width direction of the cylindrical lithium-ion battery is as follows: Figure 6d (Only a cylindrical shape is shown as an example) The X2 direction, which is the second direction consistent with the width direction of the battery, is the direction perpendicular to the main body of the cylindrical lithium-ion battery. The first direction is perpendicular to the main body of the cylindrical lithium-ion battery, and it is also perpendicular to the width direction X2, as shown below. Figure 6d The X1 direction is indicated in the text. For example... Figure 6d As shown, the clamping force of the fixture is applied in the same direction as the X1 direction. When the shape of the clamping part needs to match the contour of the battery, it is aligned with the plane in which the main body of the clamping part is substantially located (e.g., Figure 6d The direction perpendicular to the dashed box 101 shown in the diagram coincides with the X1 direction. In the plane perpendicular to the X1 direction, the battery does not move significantly along the same direction as the line connecting the geometric center of the battery and the electrode placement position to prevent the wiring stability from deteriorating. Therefore, the battery will move along the direction perpendicular to the aforementioned line, i.e., the width direction X2 of the battery.

[0079] The following still combines Figure 6a The scenario of a battery with a square cross-section will be further described. In one embodiment, as shown... Figure 7 As shown, Figure 7 This is a schematic diagram of a lithium-ion battery during its formation process. A gas bag is located on one side of the lithium-ion battery to store the gases generated during charging and discharging. The gas bag can be positioned on the left or right side of the lithium-ion battery along its width; this is not limited here. During the formation process, the lithium-ion battery can be... Figure 7 The example shown shows the air bag placed with the air bag facing upwards. It is understood that the above... Figure 4 , Figure 5 Figure 6 is for illustrative purposes only, showing the lithium-ion battery with its top facing upwards. It is worth noting that in actual formation operations, the lithium-ion battery... Figure 7 The air bag is placed with the air bag facing upwards, as shown.

[0080] exist Figure 7 In the middle, the first direction can be perpendicular to the main body of the lithium-ion battery, such as... Figure 7 The X1 direction is indicated in the diagram. The second direction is consistent with the direction of the lithium-ion battery toward the air bag, that is, consistent with the width direction of the battery, such as... Figure 7 The X2 direction is indicated in the diagram.

[0081] During the formation process of lithium-ion batteries, pressure is applied to the lithium-ion batteries through a formation fixture. Because the gas bag is... Figure 7 The upward-facing orientation of the battery allows for easy compression of hydrocarbon gases generated by the lithium-ion battery into the gas bag. After the charge / discharge cycle is complete, the gas stored in the gas bag can be released, and the lithium-ion battery can be repackaged before proceeding to subsequent manufacturing processes. In one embodiment, after the charge / discharge cycle is complete, the gas bag can be punctured with a guillotine while a vacuum is drawn to extract the gas and a small portion of the electrolyte. The lithium-ion battery is then immediately repackaged (or "secondary packaging") to ensure its airtightness. Finally, the gas bag is removed from the packaged lithium-ion battery, and the edges are trimmed and folded to ensure that the width of the lithium-ion battery does not exceed the specified limits.

[0082] The following provides a detailed description of various embodiments of the formation method for lithium-ion batteries.

[0083] In one embodiment, such as Figure 8a As shown, the formation method of lithium-ion batteries may include:

[0084] Step 110: Set charging parameters.

[0085] Charging parameters include charging current, charging time, temperature, and pressure.

[0086] Step 120: Perform a charge / discharge task on the lithium-ion battery.

[0087] Step 130: During the execution of the charging / discharging task, the lithium-ion battery is oscillated in the first direction at a preset frequency.

[0088] During the charging / discharging process, the lithium-ion battery oscillates at a preset frequency in a first direction. The first direction is perpendicular to the main body of the lithium-ion battery, and the preset frequency is the characteristic frequency of lithium-ion transport in the electrolyte.

[0089] In other words, in this embodiment, the step of oscillating the lithium-ion battery at a preset frequency in the first direction can be performed independently. By applying oscillation at a preset frequency in the first direction to the lithium-ion battery, the resonance of lithium ions transported in the electrolyte can be promoted, enabling lithium ions to be transported uniformly and rapidly in the electrolyte. This improves the consistency of the electrolyte reaction process occurring on the negative electrode surface, thereby improving the consistency of the SEI film formed on the negative electrode surface and further ensuring the durability and safety of the finished lithium-ion battery product obtained in subsequent production.

[0090] In one embodiment, such as Figure 8b As shown, the formation method of lithium-ion batteries may include:

[0091] Step 210: Set charging parameters.

[0092] Step 220: Perform a charge / discharge task on the lithium-ion battery.

[0093] Step 230: During the execution of the charging / discharging task, the lithium-ion battery is moved back and forth in the second direction.

[0094] During the execution of the charging / discharging task, the lithium-ion battery is moved back and forth in a second direction, where the second direction is the width direction of the lithium-ion battery.

[0095] In other words, in this embodiment, the step of reciprocating the lithium-ion battery in the second direction can be performed independently. By carrying the lithium-ion battery reciprocating in the second direction, the influence of gas flow on electrolyte distribution can be offset, effectively improving the problem of electrolyte vacancies, promoting sufficient electrolyte wetting, and enhancing the wettability of the electrolyte to the entire electrode area, thereby ensuring deep decomposition of the electrolyte during the formation process and improving the consistency of the formed SEI film.

[0096] In one embodiment, such as Figure 8c As shown, the formation method of lithium-ion batteries may include:

[0097] Step 310: Set charging parameters.

[0098] Step 320: Perform a charge / discharge task on the lithium-ion battery.

[0099] Step 330: During the execution of the charging / discharging task, the lithium-ion battery is oscillated at a preset frequency in the first direction and the lithium-ion battery is reciprocated in the second direction.

[0100] During the charging / discharging process, the lithium-ion battery oscillates at a preset frequency in a first direction and reciprocates in a second direction. The first direction is perpendicular to the main body of the lithium-ion battery, the preset frequency is the characteristic frequency of lithium-ion transport in the electrolyte, and the second direction is the width direction of the lithium-ion battery.

[0101] In other words, in this embodiment, during the execution of the charging / discharging task, the lithium-ion battery is not only oscillated at a preset frequency in the first direction, but also reciprocated in the second direction. In one embodiment, the lithium-ion battery can be oscillated at a preset frequency in the first direction while simultaneously reciprocating in the second direction.

[0102] In another embodiment, the lithium-ion battery can be oscillated at a preset frequency in the first direction for a first preset time, and the lithium-ion battery can be moved back and forth in the second direction for a second preset time, alternating between these actions. That is, the operation of oscillating the lithium-ion battery at the preset frequency in the first direction and the operation of moving the lithium-ion battery back and forth in the second direction are performed sequentially and separately. Specifically, the lithium-ion battery can be oscillated at the preset frequency in the first direction first, and after the first preset time, the lithium-ion battery can be moved back and forth in the second direction. After the second preset time, the lithium-ion battery can be oscillated at the preset frequency in the first direction again, and this process can be repeated until the charging / discharging task is completed. Alternatively, the lithium-ion battery can be moved back and forth in the second direction first, and after the second preset time, the lithium-ion battery can be oscillated at the preset frequency in the first direction first, and after the first preset time, the lithium-ion battery can be moved back and forth in the second direction again, until the charging / discharging task is completed.

[0103] Understandably, the first preset time and the second preset time can be the same or different. The specific values ​​of the first preset time and the second preset time can be set according to the actual situation, and are not limited here.

[0104] This embodiment applies oscillation at a preset frequency in a first direction to the lithium-ion battery during the charging / discharging process, and reciprocates the lithium-ion battery in a second direction. On one hand, applying oscillation at the preset frequency in the first direction promotes resonance of lithium ions transported in the electrolyte, resulting in uniform and rapid transport of lithium ions within the electrolyte. This promotes a consistent electrolyte reaction process on the negative electrode surface, improving the uniformity of the SEI film. On the other hand, reciprocating the lithium-ion battery in the second direction effectively addresses electrolyte vacancies, promoting sufficient electrolyte wetting and further enhancing the uniformity of the SEI film. This embodiment achieves a synergistic effect by synergistically combining oscillation and reciprocating movement to improve SEI film uniformity, resulting in a more uniform and better-quality SEI film.

[0105] In one embodiment, performing a charge / discharge task on a lithium-ion battery includes: injecting electrolyte into the lithium-ion battery and allowing it to stand for a third preset time. After standing for the third preset time, the charge / discharge task on the lithium-ion battery is initiated. By allowing the electrolyte to stand for a third preset time after injection, the wetting degree of the electrolyte can be improved to some extent before the charge / discharge task begins. The third preset time can generally be selected as 2 to 4 hours. Understandably, the specific duration can be set according to the ambient temperature and actual needs, and is not limited here.

[0106] The steps for setting charging parameters (steps 110, 210, and 220) described in the above embodiments are explained below.

[0107] First, such as Figure 9 As shown, the formation of lithium-ion batteries and the processes before and after formation can mainly include: (1) electrolyte injection; (2) static wetting; (3) charging / discharging (i.e., formation); (4) post-formation static wetting; and (5) degassing and encapsulation. Among these, the relevant parameters in the electrolyte injection step may include the electrolyte type E and the injection amount Q. The relevant parameters in the static wetting step may include the static time T3 (i.e., the aforementioned third preset time) and the temperature T1. The relevant parameters in the charging / discharging step (i.e., the aforementioned charging parameters) may include the charging current I, the charging time T1, the temperature T2, and the pressure P. The relevant parameters in the post-formation static wetting step may include the static time T2 and the temperature T3. The relevant parameters in the degassing and encapsulation step may include the temperature T4 and the vacuum degree V. By adjusting the relevant parameters in each step, an SEI film suitable for a specific battery system can be obtained.

[0108] In the formation step, the type and depth of electrolyte decomposition reactions can be controlled by adjusting the charging current I, charging time T1, temperature T2, and pressure P during the charge / discharge steps, thereby adjusting the structure and composition of the formed SEI film. For example, the charging current I can affect the type of electrolyte decomposition reaction, thus influencing the structure and composition of the formed SEI film. Temperature T2 affects both the reaction rate and the corresponding products of the chemical reaction that forms the SEI film, and also the amount of lithium ions consumed. The specific values ​​of the charging parameters in the formation step can be selected according to actual needs and are not limited here.

[0109] In one embodiment, the charging parameters include the charging parameters corresponding to each round of charging / discharging operation in the charging / discharging task, and the charging parameters corresponding to each round of charging / discharging operation are different. In other words, the charging / discharging task may include multiple rounds of charging / discharging operation, and the charging parameters in each round of charging / discharging operation are different; or, different currents, temperatures, and pressures are provided for different stages of the charging / discharging task. It is understood that the specific values ​​of the charging parameters in each round of charging / discharging operation can be adaptively set according to the process of electrolyte decomposition, so that in each charging / discharging operation, the most suitable formation environment can be provided for the process of electrolyte decomposition, thereby improving the quality of the formed SEI film.

[0110] In one embodiment, constant current charging can be used in the first round of charge / discharge operation, meaning the charging current is constant during the first round. Once the lithium-ion battery voltage rises to a preset voltage threshold, constant voltage charging is used in subsequent charge / discharge operations; in other words, a constant voltage is used until the lithium-ion battery voltage reaches the termination voltage, thus ending the charge / discharge task. The specific values ​​for the preset voltage threshold and the termination voltage can be set according to actual conditions and are not limited here.

[0111] In other embodiments, intelligent charging can be used to perform each charge / discharge cycle. In intelligent charging, the charging current that the lithium-ion battery can accept during charging can be tracked in real time, thereby automatically adjusting the charging parameters according to the state of the lithium-ion battery, ensuring that the charging current is always maintained within the allowable range, thus fulfilling the function of a lithium-ion battery.

[0112] It is understood that the implementation methods of the charging / discharging tasks described in the above embodiments are merely examples, and this application is not limited thereto. Specific implementation methods and charging parameters can be set according to actual conditions.

[0113] Based on this, the lithium-ion battery formation method in the above embodiments of this application can also improve the wettability of the electrolyte and the uniformity and speed of lithium-ion liquid phase transport in the lithium-ion battery by introducing a velocity field, even when the charging parameters are fixed or not easily changed, thereby improving the consistency of the formed SEI film. In other words, the lithium-ion battery formation method in the embodiments of this application can overcome the limitations of not being able to optimize the SEI film and the optimization effect of charging parameters by adjusting them, and achieve a more effective improvement in the consistency of the SEI film.

[0114] like Figures 10a-10b As shown, Figures 10a-10b The experimental results obtained are as follows: The lithium-ion battery was tested using the formation method of the lithium-ion battery in the embodiments of this application.

[0115] Among them, by Figure 10a As can be seen, the lithium-ion battery formation method of this application results in a uniform distribution of lithium ions on the negative electrode surface, significantly improving the uneven distribution of lithium ions on the negative electrode surface and thus reducing the occurrence of lithium dendrites (e.g.) Figures 1a-1b (As shown).

[0116] like Figure 10b As shown, Figure 10b To compare the negative electrode overpotential versus time, lithium-ion batteries formed using conventional methods and lithium-ion batteries formed using the methods described in this application were charged at the same high charging rate (5C).

[0117] During charging, the terminal voltage of a lithium-ion battery is higher than its open-circuit voltage. The difference between the terminal voltage and the open-circuit voltage is the overpotential, also known as overvoltage, during charging. The absolute value of the overpotential reflects the degree of polarization within the lithium-ion battery, and there is a positive correlation between the absolute value of the overpotential and the degree of polarization. Polarization can easily lead to incomplete charging of lithium-ion batteries, and in severe cases, it can cause battery overheating and lithium dendrite formation on the negative electrode surface, affecting battery safety and lifespan.

[0118] Depend on Figure 10b It is evident that, under the same charging rate, the absolute value of the negative electrode overpotential of the lithium-ion battery formed by the conventional method is significantly greater than that of the lithium-ion battery formed by the method described in this application. Furthermore, after 120 hours, the absolute value of the negative electrode overpotential of the lithium-ion battery formed by the conventional method suddenly increases, which significantly increases the Gibbs free energy of the lithium intercalation reaction, exceeding the Gibbs free energy of the lithium deposition reaction, thus leading to lithium plating. However, after 120 hours, the absolute value of the negative electrode overpotential of the lithium-ion battery formed by the method described in this application remains stable. From the above, it can be seen that, compared to the conventional method, the formation method of this application can reduce the polarization of the lithium-ion battery, significantly suppress the interface lithium plating problem, and thus greatly improve battery performance.

[0119] One embodiment of the present invention also provides an electronic device including a processor and a memory. The memory stores at least one instruction or at least one program segment, which is loaded and executed by the processor to implement the lithium-ion battery formation method provided in the above-described method embodiments, so as to control the oscillation control unit and the charging / discharging device in the lithium-ion battery formation system. Figure 5 The oscillation control unit and charging / discharging device shown are illustrated.

[0120] Memory is used to store software programs and modules. The processor executes these stored software programs and modules to perform various functional applications and data processing. Memory can primarily consist of a program storage area and a data storage area. The program storage area stores the operating system, application programs required for functionality, etc.; the data storage area stores data created based on device usage, etc. Furthermore, memory can include high-speed random access memory (RAM) and non-volatile memory, such as at least one disk storage device, flash memory device, or other volatile solid-state storage device. Accordingly, memory can also include a memory controller to provide the processor with access to the memory.

[0121] In one specific embodiment Figure 11 A schematic diagram of the structure of an electronic device for implementing the embodiments of the present invention is shown. The electronic device may be a computer terminal, a mobile terminal or other devices.

[0122] like Figure 11 As shown, an embodiment of the present invention provides an electronic device 1100, including a processor 1101 and a memory 1102. The memory 1102 stores computer program instructions, wherein when the computer program instructions are executed by the processor, the processor 1101 performs the steps of the lithium-ion battery formation method as described in the above embodiment.

[0123] Furthermore, such as Figure 11 As shown, the electronic device 1100 also includes a network interface 1103, an input device 1104, a hard disk 1105, and a display device 1106.

[0124] The various interfaces and devices described above can be interconnected via a bus architecture. The bus architecture can include any number of interconnecting buses and bridges. Specifically, various circuits representing one or more central processing units (CPUs) as represented by processor 1101 and one or more memories as represented by memory 1102 are connected together. The bus architecture can also connect various other circuits such as peripheral devices, voltage regulators, and power management circuits. It is understood that the bus architecture is used to implement communication between these components. In addition to the data bus, the bus architecture also includes a power bus, a control bus, and a status signal bus, which are well known in the art and therefore will not be described in detail herein.

[0125] The network interface 1103 can connect to a network (such as the Internet, local area network, etc.), obtain relevant data from the network, and save it to the hard disk 1105.

[0126] Input device 1104 can receive various commands input by the operator and send them to processor 1101 for execution. Input device 1104 may include a keyboard or clicking device, such as a mouse, trackball, touchpad, or touch screen.

[0127] Display device 1106 can display the results obtained by the processor 1101 executing instructions.

[0128] The memory 1102 is used to store programs and data necessary for the operation of the operating system, as well as intermediate results and other data during the calculation process of the processor 1101.

[0129] It is understood that the memory 1102 in the embodiments of the present invention may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. The volatile memory may be random access memory (RAM), which is used as an external cache. The memory 1102 of the apparatus and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0130] In some implementations, memory 1102 stores elements, executable modules or data structures, or subsets thereof, or extended sets thereof: operating system 11021 and application program 11022.

[0131] The operating system 11021 includes various system programs, such as the framework layer, core library layer, and driver layer, used to implement various basic business functions and handle hardware-based tasks. The application program 11022 includes various applications, such as a browser, used to implement various application functions. The program implementing the method of this embodiment can be included in the application program 11022.

[0132] When the processor 1101 calls and executes the application program and data stored in the memory 1102, specifically the program or instructions stored in the application program 11022, it executes the steps of the lithium-ion battery formation method as described in the above embodiment.

[0133] The methods disclosed in the above embodiments of the present invention can be applied to processor 1101, or implemented by processor 1101. Processor 1101 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by the integrated logic circuit of the hardware in processor 1101 or by instructions in the form of software. The processor 1101 may be a general-purpose processor, digital signal processor (DSP), application-specific integrated circuit (ASIC), off-the-shelf programmable gate array (FPGA), or other programmable logic device, discrete gate or transistor logic device, or discrete hardware component, and can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of the present invention. The general-purpose processor may be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of the present invention can be directly embodied in the execution of a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software modules may be located in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. The storage medium is located in memory 1102. Processor 1101 reads the information in memory 1102 and, in conjunction with its hardware, completes the steps of the above method.

[0134] It is understood that the embodiments described herein can be implemented in hardware, software, firmware, middleware, microcode, or a combination thereof. For hardware implementation, the processing unit can be implemented in one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field-programmable gate arrays (FPGAs), general-purpose processors, controllers, microcontrollers, microprocessors, other electronic units for performing the functions of this application, or combinations thereof.

[0135] For software implementation, the techniques described herein can be achieved through modules (e.g., procedures, functions, etc.) that perform the functions described herein. The software code can be stored in memory and executed by a processor. Memory can be implemented within the processor or externally.

[0136] In addition, embodiments of the present invention also provide a computer-readable storage medium storing a computer program, which, when executed by a processor, causes the processor to perform the steps of the lithium-ion battery formation method as described in the above embodiments.

[0137] In the several embodiments provided in this application, it should be understood that the disclosed methods and apparatus can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms.

[0138] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can be physically comprised separately, or two or more units can be integrated into one unit. The integrated unit described above can be implemented in hardware or in the form of hardware plus software functional units.

[0139] The integrated units implemented as software functional units described above can be stored in a computer-readable storage medium. These software functional units, stored in a storage medium, include several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute certain steps of the transmission and reception methods of the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0140] The above are preferred embodiments of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principles described in the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method for forming a lithium-ion battery, characterized in that, Includes the following steps: Perform charging / discharging tasks on a lithium-ion battery, wherein the lithium-ion battery is a lithium-ion battery in the formation stage; During the execution of the charging / discharging task, the lithium-ion battery is moved back and forth in a second direction, wherein the second direction is the width direction of the lithium-ion battery.

2. The formation method of a lithium-ion battery according to claim 1, characterized in that, An air bag is provided on one side of the lithium-ion battery in the width direction. The air bag is used to store the gas generated by the lithium-ion battery during charging / discharging.

3. The formation method of a lithium-ion battery according to claim 2, characterized in that, The method further includes: After the charging / discharging task is completed, the gas stored in the gas bag is released and the lithium-ion battery is repackaged.

4. The formation method of a lithium-ion battery according to claim 1, characterized in that, During the execution of the charging / discharging task, the lithium-ion battery oscillates at a preset frequency in a first direction, while simultaneously reciprocating in a second direction.

5. The formation method of a lithium-ion battery according to claim 1, characterized in that, During the execution of the charging / discharging task, the lithium-ion battery is oscillated at a preset frequency in the first direction for a first preset time, and the lithium-ion battery is moved back and forth in the second direction for a second preset time.

6. The formation method of a lithium-ion battery according to claim 1, characterized in that, Performing charge / discharge tasks on lithium-ion batteries includes: Set charging parameters, including charging current, charging time, temperature, and pressure; Initiate the charging / discharging task for the lithium-ion battery.

7. The formation method of a lithium-ion battery according to claim 6, characterized in that, The charging parameters include the charging parameters corresponding to each round of charging / discharging operation in the charging / discharging task, and the charging parameters corresponding to each round of charging / discharging operation are different.

8. The formation method of a lithium-ion battery according to claim 1, characterized in that, Performing charge / discharge tasks on lithium-ion batteries includes: Electrolyte is injected into the lithium-ion battery and left to stand for a third preset time; Initiate a charge / discharge task for the lithium-ion battery.

9. A formation system for a lithium-ion battery, characterized in that, include: A charging / discharging device is connected to the positive and negative terminals of a lithium-ion battery to charge / discharge the lithium-ion battery in order to perform a charging / discharging task. The lithium-ion battery is a lithium-ion battery in the formation stage. A vibration application component is used to clamp the lithium-ion battery and, during the execution of the charging / discharging task, to reciprocate the lithium-ion battery in a second direction; wherein the second direction is the width direction of the lithium-ion battery.

10. The lithium-ion battery formation system according to claim 9, characterized in that, The vibration applying component includes: A clamp for holding the lithium-ion battery; A vibration control unit, connected to the clamp, is used to control the clamp's oscillation or reciprocating movement.

11. The lithium-ion battery formation system according to claim 10, characterized in that, The clamp comprises two parallel clamping plates.

12. An electronic device, characterized in that, include: processor; and a memory, in which computer program instructions are stored. When the computer program instructions are executed by the processor, the processor performs the formation method of the lithium-ion battery as described in any one of claims 1-8.

13. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer program instructions that, when executed by a processor, cause the processor to perform the formation method of the lithium-ion battery as described in any one of claims 1-8.

Images