Soft package lithium battery heat sealing machine

Abstract

The utility model relates to the technical field of battery processing, and discloses a soft package lithium battery heat sealing machine which comprises a base, a heating system, a pressure system and a control system, the heating system comprises a heating end socket, an auxiliary heating piece is connected to the heating end socket, protruding parts are arranged at the two ends of the auxiliary heating piece, and the whole auxiliary heating piece is of an inverted-I-shaped structure; and the two convex parts are used for supporting tabs of the soft package battery. According to the utility model, under the condition that the input pressure is consistent, the pressurization packaging of the tab position can be realized, so that the packaging effect of the soft package battery is ensured, and meanwhile, the damage of battery components caused by overlarge pressure of other parts is avoided.

Description

Technical Field

[0001] This utility model relates to the field of battery processing technology, specifically to a heat sealing machine for soft-pack lithium batteries. Background Technology

[0002] Pouch lithium batteries, as an advanced energy storage technology, have garnered significant global attention in recent years. Their high energy density, slim design, flexible application capabilities, and excellent safety performance have secured them a crucial position in the energy storage field. With the continued growth in global demand for clean and efficient energy utilization, the pouch lithium battery market has ushered in unprecedented development opportunities. Particularly in the consumer electronics sector, the widespread adoption and rapid upgrades of devices such as smartphones and tablets have led to increasingly higher demands on battery performance. Pouch lithium batteries, with their slim profile and large capacity, have become an ideal energy solution for these devices. Simultaneously, pouch lithium batteries have also demonstrated enormous application potential in the electric vehicle sector. Their high energy density enables electric vehicles to achieve longer driving ranges, while their flexible application characteristics help meet the needs of different vehicle models and designs.

[0003] As a crucial step in the production of pouch lithium batteries, the sealing equipment's performance and quality directly impact the battery's safety and lifespan. The basic structure of pouch lithium battery sealing equipment mainly comprises four core components: a heating system, a pressure system, a control system, and a mechanical transmission system. These components work together to ensure the accuracy and efficiency of the sealing process.

[0004] The heating system is a crucial component of the sealing equipment. It uses heating elements, such as heating wires or heating plates, to locally heat the sealing area. During this process, the heating elements generate heat, causing the sealing material to melt, thus achieving an effective seal. This heating method requires precise temperature control to ensure sealing quality and battery safety.

[0005] The pressure system is responsible for applying appropriate pressure to the sealing area. During the heating process, when the sealing material reaches a molten state, the pressure system applies uniform pressure to the sealing area using air or hydraulic pressure. This step helps ensure that the sealing material adheres tightly, forming a secure seal. The pressure and application time need to be precisely adjusted according to the specific sealing material and battery specifications.

[0006] The control system is the brain of the entire sealing equipment, responsible for monitoring and adjusting various parameters throughout the sealing process. These include heating temperature, heating time, applied pressure, and sealing time. Through precise sensors and advanced control algorithms, the control system ensures that every sealing operation is performed under optimal conditions, thereby improving sealing quality and production efficiency.

[0007] The mechanical transmission system is responsible for the transport and positioning of the batteries. During the sealing process, the mechanical transmission system accurately transports the batteries to be sealed to the sealing station and sends them out after sealing. The stability and accuracy of this system are crucial to ensuring sealing quality and production efficiency.

[0008] The widespread application of pouch lithium batteries has not only driven the development of related industries but also placed higher demands on sealing equipment. The heat-sealing process is the core of the entire process, and its technical requirements are particularly stringent. Sealing equipment needs to be equipped with a high-precision heating system capable of uniformly heating the sealing area to a molten state in a short time, while avoiding material damage due to overheating. Furthermore, precise control of the pressure system is also crucial to ensure that appropriate pressure is applied after the sealing material melts, achieving a tight seal at the sealing area. However, existing heat-sealing components struggle to balance pressure and sealing effect; insufficient force leads to poor sealing at the battery edges, while excessive force can damage battery components. Utility Model Content

[0009] The present invention aims to provide a heat sealing machine for soft-pack lithium batteries to solve the problems of pressure and sealing effect in existing soft-pack lithium battery sealing equipment.

[0010] To achieve the above objectives, the present invention adopts the following technical solution: a soft-pack lithium battery heat sealing machine, including a base, a heating system, a pressure system and a control system. The heating system includes a heating head, and an auxiliary heating element is connected to the heating head. Both ends of the auxiliary heating element are provided with protrusions, and the auxiliary heating element is in the shape of an inverted "I". The two protrusions are used to support the tabs of the soft-pack battery.

[0011] The principle and advantages of this solution are as follows: In practical applications, this technical solution addresses the problems existing in the current technology for packaging soft-pack batteries by upgrading the structure of our company's existing soft-pack lithium battery heat sealing machine. First, regarding the heat sealing of the tab position of the soft-pack battery, considering the contradiction between pressure and sealing effect, an auxiliary heating element is set on the heating head. During packaging, the tab of the soft-pack battery is placed on the position corresponding to the protrusion of the auxiliary heating element. In this way, local pressure can be applied to the tab position during packaging, and pressure sealing can be achieved at the tab position under the same input pressure, thereby ensuring the packaging effect of the soft-pack battery, while avoiding excessive pressure on other parts and damage to battery components.

[0012] Preferably, as an improvement, an operating table is provided on the base, and a lifting component is connected to the bottom of the operating table.

[0013] In this technical solution, the thickness gauge dimensions will vary for different models of soft-pack lithium batteries. During packaging, the support components need to be finely adjusted according to the thickness of the battery. The lifting component can meet the above-mentioned requirements and improve the applicability of the device.

[0014] Preferably, as an improvement, there are two lifting components, each including a support base, with an operating cavity inside the support base, and a lifting drive component connected to the support base.

[0015] In this technical solution, the support base provides overall support, and the vertical height of the operating table can be adjusted by the lifting drive component, making operation convenient.

[0016] Preferably, as an improvement, the lifting drive component includes a stud, a support column, a first wedge, and a second wedge. The stud is arranged laterally and threadedly connected to the support base. One end of the stud is located inside the operating cavity, and the first wedge is located on the end of the stud located inside the operating cavity. The support column is vertically slidably connected inside the operating cavity, and the second wedge is located at the bottom end of the support column and cooperates with the first wedge.

[0017] In this technical solution, when adjusting the height of the operating table, the operator rotates the knob, which drives the stud to rotate, thereby causing the stud to move laterally along the support base. The first wedge moves laterally in the operating cavity, abuts against the second wedge and moves upward, thereby driving the support column to move upward, thus realizing the adjustment of the position of the operating table.

[0018] Preferably, as an improvement, the end of the stud away from the first wedge extends out of the operating cavity and is located outside the support seat, and a knob is connected to the end of the stud located outside the operating cavity.

[0019] In this technical solution, the stud can be easily rotated by a knob, improving the ease of use of the equipment.

[0020] Preferably, as an improvement, the knob is provided with scale markings.

[0021] In this technical solution, the positions of the two knobs can be synchronized by scale markings to ensure that the two support columns move up the same distance, thereby ensuring the stability of the operating table.

[0022] Preferably, as an improvement, a limit bar is provided on the operating table.

[0023] In this technical solution, the limiting strip on the operating table can initially limit the position of the battery, ensuring that the placement position is convenient for subsequent packaging operations.

[0024] Preferably, as an improvement, the limit bar is detachably connected to the operating table.

[0025] In this technical solution, by setting the limiting strip to a detachable connection method, the limiting strip can be easily replaced and its position adjusted to meet the packaging requirements of different battery models. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of a lithium battery heat sealing machine according to an embodiment of this utility model. Detailed Implementation

[0027] The following detailed description provides further details on specific embodiments, but the embodiments of this utility model are not limited thereto. Unless otherwise specified, the technical means used in the following embodiments are conventional means well known to those skilled in the art; the experimental methods used are all conventional methods; and the materials and reagents used are all commercially available.

[0028] The reference numerals in the accompanying drawings include: base 1, operating table 2, support base 3, knob 4, scale mark 5, support column 6, heating end cap 7, auxiliary heating element 8, and protrusion 9.

[0029] The basic implementation examples are as follows: Figure 1 As shown: a lithium battery heat sealing machine, including a base 1, a heating system, a pressure system and a control system. The connection and operation of the heating system, pressure system and control system are existing technologies and will not be described in detail here. This technical solution mainly focuses on the structural optimization of the pressure system components, aiming to improve the heat sealing effect of the heat sealing machine.

[0030] The base 1 provides overall support and is equipped with a protective shell to house the heating and pressure systems. The base 1 is equipped with an operating platform 2, which has a limit strip on its top surface and a lifting assembly at its bottom to adjust its vertical height.

[0031] There are two lifting components, one at each end of the operating platform 2. Each lifting component includes a support base 3 fixed to the base 1. The support base 3 has an operating cavity inside. A horizontal stud is threaded onto the support base 3. One end of the stud is located outside the support base 3 and is coaxially fixed to a knob 4, which has graduation marks 5. The other end of the stud is located inside the operating cavity of the support base 3, and a first wedge is integrally formed at the other end of the stud. A longitudinally arranged support column 6 is slidably connected to the support base 3. The top end of the support column 6 is fixed to the bottom of the operating platform 2, and the bottom end of the support column 6 is located inside the operating cavity. A second wedge, which cooperates with the first wedge, is integrally formed at the bottom end of the support column 6. By rotating the knob 4, the stud can be moved, thereby using the first and second wedges to move the support column 6 longitudinally, thus adjusting the height of the operating platform 2.

[0032] In this embodiment, the heating system is a traditional heating end cap 7, which is a resistance heating tube heating end cap 7. An inverted "I"-shaped auxiliary heating element 8 is fixed on the heating end cap 7. Two protrusions 9 on the auxiliary heating element 8 are used to correspond to the positions of the soft pack battery tabs to achieve local pressure heating in order to ensure the sealing effect.

[0033] The specific implementation process is as follows: When using the heat sealing machine of this technical solution to package soft-pack lithium batteries, the height of the operating platform 2 is first adjusted according to the thickness of the battery. During adjustment, the operator rotates the knob 4, which drives the stud to rotate, thereby causing the stud to move laterally along the support base 3. The first wedge moves laterally within the operating cavity, pressing against the second wedge and moving upward, thereby driving the support column 6 to move upward, thus adjusting the position of the operating platform 2. Since the knob 4 is equipped with a scale mark 5, the positions of the two knobs 4 can be synchronized through the scale mark 5 to ensure that the two support columns 6 move upward by the same distance, thereby ensuring the stability of the operating platform 2.

[0034] Then, when using the heating head 7 to encapsulate the tabs of the soft-pack battery, the battery to be encapsulated is placed on the operating table 2. The limiting strip on the operating table 2 can initially limit the position of the battery, ensuring that the placement position is convenient for subsequent encapsulation operations. In addition, since an auxiliary heating element 8 is provided on the heating head 7, when encapsulating in conjunction with the pressure system, the I-shaped auxiliary heating element 8 can achieve localized pressure on the end of the tab, ensuring the encapsulation effect without requiring excessive pressure, thus avoiding the problem of excessive pressure damaging the components.

[0035] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A heat-sealing machine for soft-pack lithium batteries, comprising a base, a heating system, a pressure system, and a control system, characterized in that: The heating system includes a heating head, on which an auxiliary heating element is connected. Both ends of the auxiliary heating element are provided with protrusions, and the auxiliary heating element is in the shape of an inverted "I". The two protrusions are used to support the tabs of the soft-pack battery.

2. The heat sealing machine for soft-pack lithium batteries according to claim 1, characterized in that: An operating table is provided on the base, and a lifting component is connected to the bottom of the operating table.

3. The heat sealing machine for soft-pack lithium batteries according to claim 2, characterized in that: There are two lifting components, each including a support base with an operating cavity inside, and the support base is connected to a lifting drive component.

4. The heat sealing machine for soft-pack lithium batteries according to claim 3, characterized in that: The lifting drive component includes a stud, a support column, a first wedge, and a second wedge. The stud is arranged horizontally and threadedly connected to the support base. One end of the stud is located inside the operating cavity, and the first wedge is located on the end of the stud located inside the operating cavity. The support column is vertically slidably connected inside the operating cavity, and the second wedge is located at the bottom end of the support column and cooperates with the first wedge.

5. The heat sealing machine for soft-pack lithium batteries according to claim 4, characterized in that: The end of the stud away from the first wedge extends out of the operating cavity and is located outside the support base, and a knob is connected to the end of the stud located outside the operating cavity.

6. The heat sealing machine for soft-pack lithium batteries according to claim 5, characterized in that: The knob is equipped with scale markings.

7. The heat sealing machine for soft-pack lithium batteries according to claim 6, characterized in that: Limit bars are provided on the operating platform.

8. The heat sealing machine for soft-pack lithium batteries according to claim 7, characterized in that: The limiting strip is detachably connected to the operating table.

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