Forming and capacity grading clamp and forming and capacity grading equipment

Abstract

The utility model discloses a formation and capacity grading clamp and formation and capacity grading equipment. The formation and capacity grading clamp comprises a clamping plate, a cooling mechanism and a heating mechanism, the clamping plate is provided with two flat side surfaces, and a heating mechanism is compounded on at least one side surface of the clamping plate; the cooling mechanism is at least partially formed in the clamping plate, the clamping plate is hollow to form an internal cooling liquid pipeline of the cooling mechanism, and a port for communicating the internal cooling liquid pipeline with an external cooling liquid pipeline is formed in the end part of the clamping plate. According to the formation and capacity grading clamp disclosed by the utility model, by improving the clamping plates, heating and cooling of the battery cells between the clamping plates are realized, and formation equipment and capacity grading equipment are integrated, so that not only is the production efficiency improved, but also the equipment cost is reduced, and meanwhile, the test accuracy of the equipment is also improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery core production, and particularly relates to a battery capacity splitting fixture and battery capacity splitting equipment. Background Art

[0002] In the manufacturing process of lithium-ion batteries, formation and capacity grading are two crucial steps. Formation, also known as activation, occurs after the battery cell is assembled and is depleted of power. This initial charge and discharge process activates the positive and negative electrode materials within the battery, improving its overall performance. This is the initial activation and performance optimization process. Capacity grading, on the other hand, involves charging and discharging batteries to screen for cells that meet quality standards, such as capacity and internal resistance. Formation and capacity grading are crucial steps in the battery manufacturing process, particularly in lithium battery production, where these two processes are crucial for ensuring battery quality and performance.

[0003] In traditional production processes, battery cell formation and capacity grading are typically performed using separate, separate equipment. The cells first undergo a series of charge-discharge cycles in the formation equipment to activate internal chemical reactions and enhance battery performance. Subsequently, the cells are transferred to the capacity grading equipment for capacity testing to assess their actual available capacity. However, this separate, separate equipment approach has exposed a number of problems in practical applications. During the formation stage, because high temperatures improve formation efficiency, the equipment primarily focuses on heating the cells to accelerate internal chemical reactions, but this lacks effective integration and coordinated control with the subsequent capacity grading stage. During the capacity grading stage, the cells generate heat. Excessive temperatures can affect the measured capacity, necessitating cooling. While the equipment can assist with this by adjusting the ambient temperature, temperature control during the capacity grading process is often ineffective due to limitations in the accuracy and stability of ambient temperature control. This inadequate temperature control directly impacts the cell capacity test results, leading to inaccurate test data and, in turn, compromising battery pack assembly and the performance consistency of the final product. Furthermore, split equipment adds a transfer step to the production process, reducing production efficiency and increasing the risk of damage to the battery cells during transport. Furthermore, the need to separately control the temperature environments of the formation and fractionation equipment significantly increases environmental control costs for the entire production line. This includes energy consumption from the equipment itself, environmental maintenance costs, and the additional cooling or heating measures required to achieve the required temperature conditions.

[0004] In summary, existing separate split equipment has many limitations and deficiencies in the process of forming and sizing battery cells. Therefore, a formation and sizing fixture and a formation and sizing equipment are proposed. Utility Model Content

[0005] The purpose of this utility model is to provide a formation and capacity separation fixture and equipment to address the above-mentioned shortcomings. By improving the clamping plates, the heating and cooling of the battery cells between the clamping plates can be achieved, thereby integrating the formation equipment and capacity separation equipment into one, reducing equipment costs while also increasing equipment testing accuracy. To achieve the above-mentioned purpose, the utility model provides the following technical solutions:

[0006] A chemical component filling fixture includes a clamp, a cooling mechanism and a heating mechanism; the clamp has two flat surfaces, wherein at least one surface of the clamp is composited with a heating mechanism; the cooling mechanism is at least partially formed inside the clamp, wherein the clamp is hollow to form an internal coolant pipeline for the cooling mechanism, and the end of the clamp is formed with a port for connecting the internal coolant pipeline with the external coolant pipeline.

[0007] Furthermore, the heating mechanism includes a sheet-like heating element, a temperature sensing probe and a controller; the sheet-like heating element is attached to the outer surface of the splint or the sheet-like heating element is stacked on the surface of the splint; the heating element and the temperature sensing probe are electrically connected to the controller respectively.

[0008] Furthermore, the heating element is a silicone heating sheet, a PI heating sheet, an epoxy board heating sheet, a thick film heating sheet, or a PET heating sheet.

[0009] Furthermore, a coolant inlet and a coolant outlet are respectively provided at both ends of the splint in the length direction; and both the coolant inlet and the coolant outlet are connected to an external coolant pipeline.

[0010] Furthermore, the cooling mechanism includes a coolant storage tank; the coolant storage tank is connected to the coolant inlet and the coolant outlet respectively through external coolant pipelines.

[0011] Furthermore, the cooling mechanism also includes a coolant pump; a coolant pump is provided at the outlet of the coolant storage tank; the coolant pump is used to drive the coolant in the coolant storage tank to circulate in the splint through the coolant pipeline.

[0012] Furthermore, the coolant inlet is provided at one end of the clamping plate; the coolant outlet is provided at the other end of the clamping plate.

[0013] Furthermore, a plurality of reinforcing members are provided in the splint; the reinforcing members are supported between two side surfaces in the splint.

[0014] Furthermore, the reinforcements are distributed in an array.

[0015] A chemical separation and containment device comprises a plurality of the above-mentioned chemical separation and containment fixtures.

[0016] The beneficial effects of the utility model are:

[0017] The utility model discloses a chemical formation and capacity separation fixture and chemical formation and capacity separation equipment, comprising a clamp, a cooling mechanism, and a heating mechanism; the clamp has two flat surfaces on both sides, wherein a heating mechanism is composited on at least one surface of the clamp; the cooling mechanism is at least partially formed inside the clamp, wherein the clamp is hollow to form an internal coolant pipeline for the cooling mechanism, and a port for connecting the internal coolant pipeline with an external coolant pipeline is formed at the end of the clamp. The utility model is a chemical formation and capacity separation fixture, which realizes heating and cooling of the battery cells between the clamps by improving the clamps, thereby integrating the formation equipment and the capacity separation equipment into one, which not only improves production efficiency, but also reduces equipment cost, and also increases the test accuracy of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural diagram of the splint and heating mechanism of the utility model;

[0019] Figure 2 This is a schematic diagram of the connection between the splint and the cooling mechanism of the utility model;

[0020] Figure 3 It is a three-dimensional structural diagram of the interior of the plywood of the utility model;

[0021] Figure 4 It is a three-dimensional structural diagram of the chemical separation and containment fixture part of the chemical separation and containment equipment of the present invention;

[0022] In the attached figure: 1- splint, 2- coolant inlet, 3- coolant outlet, 4- reinforcement, 5- heating element, 6- temperature sensor, 7- coolant tank, 8- coolant pump, 9- external coolant pipeline, 10- support rod. DETAILED DESCRIPTION

[0023] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0024] It should be understood that the terms used herein are for the purpose of describing specific example embodiments only and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "comprise", "include", "contain" and "have" are inclusive and therefore specify the presence of the stated features, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, steps, operations, elements, parts and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring them to be performed in the specific order described or illustrated, unless the order of execution is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0025] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates otherwise, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teachings of the example embodiments.

[0026] For ease of description, spatially relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figures, such as "inside", "outside", "inside", "outside", "below", "beneath", "above", "above", etc. Such spatially relative terms are meant to include different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is flipped, then an element described as "below other elements or features" or "below other elements or features" will then be oriented as "above other elements or features" or "above other elements or features". Thus, the example term "below..." can include both above and below orientations. The device can be oriented otherwise (rotated 90 degrees or in other orientations) and the spatially relative descriptors used herein are interpreted accordingly.

[0027] Example 1:

[0028] Figure 1The specific structure of the capacity splitting fixture of the present invention is shown. The capacity splitting fixture includes a clamp 1, a cooling mechanism and a heating mechanism. A heating mechanism is provided on at least one outer surface of the clamp 1. The heating mechanism is used to heat the battery cells between the clamps during the formation process, increase the temperature of the battery cells during the formation process, accelerate the internal chemical reaction of the battery cells, and improve the formation efficiency. The clamp 1 is a hollow structure, and an internal coolant pipeline of the cooling mechanism is formed inside it. Ports connected to the external coolant pipeline 9 are provided at both ends of the clamp 1. During the capacity splitting process, the coolant flows into the clamp 1 through the external coolant pipeline 9 to cool the clamp 1, thereby cooling the battery cells in contact with the clamp 1, avoiding the battery cells from overheating during the capacity splitting process, which affects the test of the battery cell capacity. The utility model provides a chemical separation and capacity division fixture. By improving the clamping plate 1, the battery cell can be heated to increase the temperature during the battery cell formation process, and the temperature of the battery cell can be reduced during the battery cell capacity division process. The chemical formation equipment and the capacity division equipment are integrated into one, which not only improves the production efficiency, but also reduces the equipment cost, and also increases the test accuracy of the equipment.

[0029] Specifically, the heating mechanism includes a sheet-shaped heating element 5, a temperature sensor 6 and a controller. A sheet-shaped heating element 5 is provided on the outer surface of the clamping plate 1 that contacts the battery core. Figure 1 As shown, the heating element 5 can be directly attached to the outer surface of the splint 1. The heating element 5 is electrically connected to the controller. During the formation process of the battery cell, the heating element 5 receives electrical energy from the controller to generate heat, and transmits the generated heat to the battery cell in contact with it to heat the battery cell and increase the temperature of the battery cell. A temperature probe 6 is also provided on one side of the heating element 5 for real-time monitoring of the temperature of the splint 1. The temperature probe 6 is electrically connected to the controller. The temperature probe 6 transmits the detected temperature data to the controller. The controller receives the temperature monitored by the temperature probe 6 and adjusts the power supply to the heating element 5 according to a preset temperature range. When the temperature is too high, the power supply is reduced or heating is stopped to ensure that the temperature fluctuates within a safe range. Among them, the heating element 5 can be a silicone heating sheet, a PI heating sheet, an epoxy board heating sheet, a thick film heating sheet, or a PET heating sheet. The PET heating sheet is lightweight and relatively low in cost; the thick film heating sheet achieves uniform heat distribution of the heating element and improves heating efficiency; the epoxy board heating sheet has good stability and insulation to ensure electrical safety; the PI heating sheet can withstand high temperatures, usually up to about 280°C, and is suitable for medium and high temperature environments; the silicone material has good elasticity and flexibility, and can fit tightly to various irregular surfaces to achieve uniform heating.

[0030] Specifically, Figure 2The schematic diagram shows the connection between the cooling mechanism and the clamping plate of the present invention. Clamping plate 1 is a hollow structure, within which the cooling mechanism's internal coolant pipeline is formed to accommodate the coolant. A coolant inlet 2 and a coolant outlet 3 are provided at each end along the length of clamping plate 1. During the cell capacity distribution process, coolant enters clamping plate 1 through coolant inlet 2 and fills the interior of clamping plate 1, thereby reducing the temperature of clamping plate 1 and, consequently, the temperature of the cells in contact with clamping plate 1. The coolant inlet 2 and the coolant outlet 3 are respectively connected to the external coolant pipeline 9, and are connected to the coolant storage tank 7 through the external coolant pipeline 9. The coolant storage tank 7 is used to store coolant. A coolant pump 8 is provided at the outlet of the coolant storage tank 7. The coolant pump 8 pumps out the coolant inside the coolant storage tank 7 and transports it to the coolant inlet 2 through the external coolant pipeline 9, and enters the inside of the splint 1 from the coolant inlet 2 to cool the splint 1, thereby cooling the battery cells in contact with the splint 1. The coolant then flows out from the coolant outlet 3 through the external coolant pipeline 9 and flows back to the coolant storage tank 7. A coolant pump 8 is also provided at the outlet of the coolant storage tank 7. The coolant in the coolant storage tank 7 is driven by the coolant pump 8 to circulate through the external coolant pipeline 9 in the splint 1 to reduce the temperature of the battery cells and ensure the accuracy of the battery cell capacity test during the process.

[0031] Specifically, the coolant inlet 2 is arranged at the bottom of one end of the splint 1, and the coolant outlet 3 is arranged at the top of one end of the splint 1. The height of the coolant inlet 2 relative to the splint 1 is lower than the height of the coolant outlet 3, so that the coolant can enter the splint 1 from the coolant inlet 2 and fill the entire interior of the splint 1, thereby improving the cooling effect on the battery cell.

[0032] Specifically, the hollow interior of the splint 1 is provided with a plurality of reinforcing members 4, such as Figure 3 The reinforcement members 4 are supported between the two sides of the splint 1 and are distributed in an array to improve the pressure bearing capacity of the splint 1 .

[0033] Example 2:

[0034] A chemical separation and storage device, comprising a plurality of chemical separation and storage fixtures according to the first embodiment, such as Figure 4 As shown. In the cell-splitting device, a support rod 10 is provided, and the support rod 10 is fixed in the device. The four corners of the splint 1 are sleeved on the support rod 10. The splint 1 can slide on the support rod 10. A chain is also provided between every two splints 1. The chain limits the maximum distance between the two splints 1. When the battery cell is cell-splitting, the battery cell is placed between the two splints 1, and the splint 1 is pushed to slide on the support rod 10. The splints 1 approach each other and contact the battery cell, and finally clamp the battery cell. Other mechanisms of the cell-splitting device are well known to those skilled in the art, so other mechanisms of the cell-splitting device are not described in detail here.

[0035] All technical features in this embodiment can be freely combined according to actual needs. The above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions of the present invention, and all of these should be included in the scope of the claims of the present invention. The technologies, shapes, and structural parts not described in detail in this utility model are all well-known technologies.

[0036] The above embodiments are preferred implementation schemes of the present invention. In addition, other implementation schemes are also included. Any obvious replacement without departing from the concept of the present technical solution is within the protection scope of the present invention.

Claims

1. A chemical content fixture, characterized by: The invention comprises a splint (1), a cooling mechanism and a heating mechanism; the splint (1) has two flat surfaces, wherein at least one surface of the splint (1) is composited with a heating mechanism; the cooling mechanism is at least partially formed inside the splint (1), wherein the splint (1) is hollow to form an internal coolant pipeline of the cooling mechanism, and a port for connecting the internal coolant pipeline with an external coolant pipeline (9) is formed at the end of the splint (1).

2. A chemical content-splitting fixture according to claim 1, characterized in that: The heating mechanism comprises a sheet-like heating element (5), a temperature sensing probe (6) and a controller; the sheet-like heating element (5) is attached to the outer surface of the splint (1) or the sheet-like heating element (5) is stacked on the surface of the splint (1); the heating element (5) and the temperature sensing probe (6) are respectively electrically connected to the controller.

3. The chemical separation and content fixture according to claim 2, characterized in that: The heating element (5) is a silica gel heating sheet, a PI heating sheet, an epoxy board heating sheet, a thick film heating sheet, or a PET heating sheet.

4. The chemical separation and content fixture according to claim 1, characterized in that: A cooling liquid inlet (2) and a cooling liquid outlet (3) are respectively provided at both ends of the clamping plate (1) in the longitudinal direction; the cooling liquid inlet (2) and the cooling liquid outlet (3) are both connected to an external cooling liquid pipeline (9).

5. The chemical separation and content fixture according to claim 4, characterized in that: The cooling mechanism comprises a cooling liquid storage tank (7); the cooling liquid storage tank (7) is respectively connected to a cooling liquid inlet (2) and a cooling liquid outlet (3) via an external cooling liquid pipeline (9).

6. The chemical separation and content fixture according to claim 5, characterized in that: The cooling mechanism further comprises a coolant pump (8); a coolant pump (8) is provided at the outlet of the coolant storage tank (7); the coolant pump (8) is used to drive the coolant in the coolant storage tank (7) to circulate in the clamping plate (1) through an external coolant pipeline (9).

7. The chemical separation and content fixture according to claim 4, characterized in that: The cooling liquid inlet (2) is arranged at one end of the clamping plate (1); and the cooling liquid outlet (3) is arranged at the other end of the clamping plate (1).

8. The chemical separation and content fixture according to claim 1, characterized in that: A plurality of reinforcing members (4) are provided in the splint (1); the reinforcing members (4) are supported between two side surfaces in the splint (1).

9. The chemical separation and content fixture according to claim 8, characterized in that: The reinforcement members (4) are distributed in an array.

10. A chemical fractionation device, characterized by: It comprises a plurality of chemical component holding fixtures according to any one of claims 1 to 9, wherein the chemical component holding fixtures are stacked in a vertical direction along the flat two side surfaces of the clamping plate (1).

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