Rotary pressurization packaged solid-state lithium battery, movement mechanism and vehicle

Abstract

The utility model discloses a solid-state lithium battery packaged by rotating and pressurizing, a movement mechanism and a vehicle, the solid-state lithium battery comprises a shell, and a solid-state lithium battery module is arranged in the shell; a rotary pressurizing device is arranged above the solid-state lithium battery module; the rotary pressurizing device comprises an upper pressing plate and a lower pressing plate; a worm gear and a worm for driving the worm gear to rotate are arranged on the lower pressing plate; an internal thread is arranged in the worm gear, a boss is arranged on the lower surface of the upper pressing plate, and an external thread matched with the internal thread is arranged on the outer surface of the boss. The pressurizing device has the advantages of being high in space utilization rate, good in anti-vibration performance and high in structural safety, operation is easy, pressurizing operation can be rapidly completed by a single person after packaging, the pressurizing device has the force amplification characteristic, pressurizing is labor-saving and time-saving, the framework has the self-locking characteristic after pressurizing, and pressure can be self-kept.

Description

Technical Field

[0001] This utility model belongs to the field of solid-state battery packaging technology, specifically relating to a rotary pressurized packaged solid-state lithium battery, a motion mechanism, and a vehicle. Background Technology

[0002] The statements herein provide only background information related to this invention and do not necessarily constitute prior art.

[0003] Solid-state lithium batteries are lithium-ion batteries that use solid electrolytes. Compared with liquid electrolyte lithium batteries, they have characteristics such as being non-flammable, non-corrosive, non-volatile, and resistant to high temperatures. They also have significant advantages in safety and energy density compared to liquid batteries, and have attracted widespread attention from countries around the world.

[0004] The use of a pressurized structure in solid-state lithium battery packaging is based on the following necessity:

[0005] (1) Ensure component contact: The pressurized structure applies pressure to make the positive electrode, negative electrode and electrolyte and other components inside the battery in close contact, thereby reducing resistance and improving conductivity.

[0006] (2) To prevent leakage, although solid electrolytes are not easy to flow, pressurization can reduce the sealing gap and prevent electrolyte migration or leakage.

[0007] (3) Improved performance: Good contact and sealing can improve the energy density, cycle life and rate performance of the battery;

[0008] (4) Manufacturing process requirements: The pressurized structure helps to fix the shape of the battery and prevents the structure from loosening or deforming due to insufficient pressure during the packaging process.

[0009] In summary, pressurized structures are a key technology in solid-state lithium battery packaging, and are crucial to the stability and reliability of the battery.

[0010] Existing solid-state lithium battery module packaging methods are relatively simple. For example, the technical solution disclosed in patent publication number JP6801737B2 uses side plates as pull plates for support during solid-state lithium battery module packaging. The end plates are tightened by bolts at both ends to apply pressure to the stacked battery pack. This method of pressurization structure is simple, but solid-state lithium battery packaging requires high pressure, thus requiring a robust structure. Furthermore, in applications such as solid-state lithium batteries being installed in vehicles, the overall structure vibrates. If the pressurization and packaging are not properly secured, the pressure will decrease due to vibration and time-related degradation. Utility Model Content

[0011] The purpose of this invention is to overcome the shortcomings of the prior art and provide a rotary pressurized packaged solid-state lithium battery, motion mechanism and vehicle. A rotary pressurization device is set above the solid-state lithium battery module. The rotary pressurization device is a spiral pressurization pressure amplification structure, which has the advantages of high space utilization, good vibration resistance and high structural safety. Moreover, it is simple to operate. The pressurization operation can be completed quickly by a single person after packaging. It has force amplification characteristics, and pressurization is labor-saving and time-saving. After pressurization, the structure has a self-locking characteristic and the pressure can be maintained.

[0012] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0013] This utility model provides a rotary pressurized solid-state lithium battery, comprising: a housing, wherein a solid-state lithium battery module is disposed inside the housing; a rotary pressurizing device is disposed above the solid-state lithium battery module; the rotary pressurizing device includes an upper pressure plate and a lower pressure plate; a worm gear and a worm for driving the worm gear to rotate are disposed on the lower pressure plate; an internal thread is disposed inside the worm gear; a boss is disposed on the lower surface of the upper pressure plate; and an external thread that mates with the internal thread is disposed on the outer surface of the boss.

[0014] In at least one embodiment, the lower pressure plate is provided with a worm gear limiting groove, and the worm gear is disposed in the worm gear limiting groove.

[0015] In at least one embodiment, the worm length is greater than the width of the housing; or the worm length is greater than the length of the housing.

[0016] In at least one embodiment, the lead angle of the worm is smaller than the friction angle.

[0017] In at least one embodiment, a buffer structure is provided between the solid-state lithium battery module and the pressure plate.

[0018] In at least one embodiment, the buffer structure is made of soft rubber or plastic.

[0019] In at least one embodiment, the buffer structure is a stacked spring group or a spring series / parallel group structure.

[0020] In at least one embodiment, a side plate is installed on the side of the housing, and the side plate has a through hole.

[0021] The beneficial effects of the above-described technical solution of this utility model are as follows:

[0022] 1) In a rotary pressurized packaged solid-state lithium battery of this utility model, a rotary pressurization device is provided above the solid-state lithium battery module. The rotary pressurization device is a spiral pressurization pressure amplification structure, which has the advantages of high space utilization, good vibration resistance, and high structural safety. Moreover, it is simple to operate, and the pressurization operation can be completed quickly by a single person after packaging. It has the force amplification characteristic, and pressurization is labor-saving and time-saving. After pressurization, the structure has a self-locking characteristic, and the pressure can be maintained.

[0023] 2) The rotary pressurizing device composed of worm gear mechanism can effectively convert the input rotary motion into the output rotary motion, and through the cooperation of the turbine center and the stud, it can be converted into vertical motion, which can realize a large force amplification function in a compact space and achieve high-efficiency force transmission.

[0024] 3) The rotary pressurizing device composed of worm gear mechanism has a self-locking characteristic, which means that it can only transmit power from worm to worm wheel and cannot drive in the reverse direction. It can ensure that after the force is applied, the pressurizing mechanism will not be unlocked due to the reaction force without manual unlocking.

[0025] 4) The rotary pressurizing device composed of worm gear mechanism can achieve a large speed ratio / force ratio in a small space, which is particularly advantageous for some applications with strict size requirements and can effectively improve space utilization.

[0026] 5) The flexibility and adaptability of the worm gear transmission system enable the rotary pressurizing device to withstand certain impact loads, making it suitable for applications with dynamic loads, such as solid-state lithium batteries in automobiles or other moving mechanisms, thus avoiding the problems of pressure vibration attenuation or time-related attenuation in the pressurizing structure of solid-state lithium batteries. Attached Figure Description

[0027] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0028] Figure 1 This is a schematic diagram of the overall structure of a rotary pressurized packaged solid-state lithium battery according to this utility model;

[0029] Figure 2 This is an exploded view of the overall structure of a rotary pressurized solid-state lithium battery according to this utility model;

[0030] Figure 3 This is an exploded view of the rotary pressurizing device for a solid-state lithium battery with rotary pressurizing packaging according to this utility model.

[0031] In the diagram: 1 is the housing; 2 is the side plate; 3 is the solid-state lithium battery module; 4 is the buffer structure; 5 is the rotary pressurizing device; 51 is the upper pressure plate; 52 is the worm gear; 53 is the lower pressure plate; 54 is the worm.

[0032] The distances or dimensions between parts have been exaggerated to show their positions; the diagram is for illustrative purposes only. Detailed Implementation

[0033] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0034] For ease of description, the words "up," "down," "left," and "right" appearing in this utility model only indicate that they are consistent with the up, down, left, and right directions of the accompanying drawings. They do not limit the structure and are merely for the purpose of facilitating the description of this utility model and simplifying the description. They do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0035] Terminology Explanation: The terms "installation," "connection," "linking," and "fixing" in this utility model should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction relationship between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0036] Worm gear: A gear with helical teeth, typically used in conjunction with a worm. The teeth of the worm gear are usually concave to mesh with the convex teeth of the worm.

[0037] A worm gear is a shaft with helical grooves (similar to a thread) that works in conjunction with a worm wheel. The worm's rotation drives the worm wheel's rotation. The worm's rotational motion can be converted into the worm wheel's rotational or linear motion.

[0038] Solid-state lithium battery: A solid-state lithium battery is a type of lithium battery that uses a solid electrolyte instead of a traditional liquid electrolyte. The main purpose of pressurization is to ensure good contact and tight fit between the various parts of the solid-state lithium battery, thereby improving the battery's performance and lifespan.

[0039] Worm gear transmission is a mechanical transmission method that uses the meshing between a worm and a worm wheel to transmit motion and force. This transmission method has self-locking properties, meaning that when the worm rotates, it can drive the worm wheel to rotate; however, the worm wheel cannot drive the worm in the opposite direction.

[0040] As described in the background section, the purpose of this utility model is to overcome the shortcomings of the prior art and provide a rotary pressurized packaged solid-state lithium battery, motion mechanism, and vehicle. A rotary pressurization device is provided above the solid-state lithium battery module. This rotary pressurization device is a spiral pressurization pressure amplification structure, which has the advantages of high space utilization, good vibration resistance, and high structural safety. Moreover, it is simple to operate, and the pressurization operation can be completed quickly by a single person after packaging. It has force amplification characteristics, saves effort and time in pressurization, and the structure has a self-locking characteristic after pressurization, so the pressure can be maintained.

[0041] Example 1

[0042] In a typical embodiment of this utility model, such as Figure 1 As shown, this embodiment discloses a rotary pressurized solid-state lithium battery, including: a housing 1, a solid-state lithium battery module 3 disposed inside the housing 1; and a rotary pressurization device 5 disposed above the solid-state lithium battery module 3.

[0043] In this embodiment, the solid-state lithium battery module 3 is a module composed of stacked solid-state lithium battery cells. It is fixedly installed inside the housing 1 by bolts at the bottom. A rotary pressurizing device 5 is provided on the upper part. When the solid-state lithium battery module 3 is packaged, the rotary pressurizing device 5 is used to pressurize and package it.

[0044] like Figure 2 and Figure 3 As shown, the rotary pressurizing device 5 includes an upper pressure plate 51 and a lower pressure plate 53. The lower pressure plate 53 is equipped with a worm gear 52 and a worm 54 that drives the worm gear 52 to rotate. The worm gear 52 has an internal thread. The lower surface of the upper pressure plate 51 has a boss, and the outer surface of the boss has an external thread that mates with the internal thread. By rotating the worm 54, the worm gear 52 is driven to rotate. Because the worm gear 52 has an internal thread that mates with the external thread of the boss on the upper pressure plate 51, the worm gear 52 can move up and down as a whole, thereby pushing the lower pressure plate 53 downward to apply pressure. The worm gear 52 and worm 54 mechanism effectively converts the input rotational motion into the output rotational motion, and through the engagement of the worm wheel center with the boss, converts it into vertical motion, achieving a large force amplification function within a compact space. Moreover, the worm gear 52 and worm 54 transmission can achieve a large speed ratio / force ratio within a small space, which is particularly advantageous for applications with strict size requirements, such as solid-state lithium battery module 3 packaging.

[0045] Furthermore, the lower pressure plate 53 is provided with a worm gear 52 limiting groove, and the worm gear 52 is disposed in the worm gear 52 limiting groove. The worm gear 52 limiting groove can restrict the turbine from moving in the horizontal direction. During rotation, the worm gear 52 can only move up or down with the thread of the boss, which further ensures the pressurizing effect of the rotary pressurizing device 5.

[0046] Furthermore, to facilitate rotational pressurization during packaging, this embodiment stipulates that at least one end of the worm gear 54 protrudes outside the housing 1. If the worm gear 54 is arranged along the width direction of the housing 1, its length is greater than the width of the housing 1; if the worm gear 54 is arranged along the length direction of the housing 1, its length is greater than the length of the housing 1. The specific arrangement of the worm gear 54 can be selected according to actual needs, and all related technical solutions are within the protection scope of this utility model.

[0047] Furthermore, a side plate 2 is installed on the side of the housing 1. If the worm 54 is arranged along the width direction of the housing 1, the side plate 2 has a through hole for the worm 54 to pass through; if the worm 54 is arranged along the length direction of the housing 1, a through hole can be opened on the housing 1 for the worm 54 to pass through, and no through hole needs to be opened on the side plate 2. The method and position of opening the through hole can be designed according to actual needs, and the relevant technical solutions are all within the protection scope of this utility model.

[0048] As an alternative implementation, the shape of the lower pressure plate 53 can be as follows: Figures 1-3 The U-shape shown can also be a flat plate as shown in the upper pressure plate 51, or other shapes. The specific shape of the lower pressure plate 53 can be designed according to actual needs, and all related technical solutions are within the protection scope of this utility model.

[0049] Furthermore, to ensure the self-locking characteristic of the rotary pressurizing device 5, in this embodiment, the lead angle of the worm 54 is set to be smaller than the friction angle. When the lead angle of the worm 54 is smaller than the friction angle, the worm wheel 52 and worm 54 mechanism have a self-locking characteristic, meaning that it can only transmit power from the worm 54 to the worm wheel 52, and cannot drive in the reverse direction. This characteristic means that after force is applied, the pressurizing mechanism will not be unlocked due to the reaction force without manual unlocking, ensuring that the solid-state lithium battery maintains its pressurizing effect after packaging. Even when applied to applications with dynamic loads, such as battery modules in automobiles or other moving mechanisms, it can withstand certain impact loads, avoiding the problems of pressure vibration attenuation or time-related attenuation in the solid-state lithium battery pressurizing structure.

[0050] Furthermore, a buffer structure 4 is provided between the solid-state lithium battery module 3 and the lower pressure plate 53 of the rotary pressurizing device 5. This buffer structure 4 can be made of soft rubber or plastic, or it can be a stacked group of springs or a series / parallel group of springs. By providing the buffer structure 4, during the sealing pressurization process, the lower pressure plate 53 transmits pressure to the buffer structure 4. The buffer structure 4, through its relatively soft material properties, evenly transmits the pressure to the solid-state lithium battery module 3, ensuring that the sealed solid-state lithium battery is subjected to uniform pressure and is essentially under isostatic pressure operating conditions. The high-pressure sealing of solid-state lithium batteries is mainly to: eliminate interface porosity, ensure close contact between the electrodes and electrolyte, improve ion conductivity, suppress lithium dendrite formation, and enhance structural stability. High pressure and uniform pressurization can achieve uniform densification of the material in all directions, eliminate local stress concentration, and ensure consistent battery performance.

[0051] In this embodiment, a spiral pressurization structure is introduced when packaging solid-state lithium batteries. This structure has the advantages of high space utilization, good vibration resistance, and high structural safety. Moreover, it is simple to operate, and the pressurization operation can be completed quickly by a single person after packaging. It has force amplification characteristics, which saves effort and time in pressurization. After pressurization, the structure has self-locking characteristics, and the pressure can be maintained.

[0052] Example 2

[0053] In a typical embodiment of this utility model, this embodiment discloses a motion mechanism that uses a rotary pressurized solid-state lithium battery as described in Embodiment 1. The solid-state lithium battery includes a housing 1, a solid-state lithium battery module 3 is disposed inside the housing 1, and a rotary pressurizing device 5 is disposed above the solid-state lithium battery module 3. The rotary pressurizing device 5 includes an upper pressure plate 51 and a lower pressure plate 53. A worm gear 52 and a worm 54 for driving the worm gear 52 to rotate are disposed on the lower pressure plate 53. The worm gear 52 is provided with an internal thread. A boss is provided on the lower surface of the upper pressure plate 51, and an external thread that mates with the internal thread is provided on the outer surface of the boss.

[0054] Example 3

[0055] In a typical embodiment of this utility model, this embodiment discloses a vehicle that uses a rotary pressurized solid-state lithium battery as described in Embodiment 1. The solid-state lithium battery includes a housing 1, a solid-state lithium battery module 3 is disposed inside the housing 1, and a rotary pressurizing device 5 is disposed above the solid-state lithium battery module 3. The rotary pressurizing device 5 includes an upper pressure plate 51 and a lower pressure plate 53. A worm gear 52 and a worm 54 for driving the worm gear 52 to rotate are disposed on the lower pressure plate 53. The worm gear 52 is provided with an internal thread. A boss is provided on the lower surface of the upper pressure plate 51, and an external thread that mates with the internal thread is provided on the outer surface of the boss.

[0056] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A spin-pressurized solid-state lithium battery, characterized in that, include: A housing, wherein a solid-state lithium battery module is disposed inside the housing; A rotary pressurizing device is provided above the solid-state lithium battery module; the rotary pressurizing device includes an upper pressure plate and a lower pressure plate; a worm gear and a worm that drives the worm gear to rotate are provided on the lower pressure plate; the worm gear has an internal thread inside, a boss is provided on the lower surface of the upper pressure plate, and an external thread that mates with the internal thread is provided on the outer surface of the boss.

2. A solid-state lithium battery with spin-pressurized packaging as described in claim 1, characterized in that, The lower pressure plate is provided with a worm gear limiting groove, and the worm gear is disposed in the worm gear limiting groove.

3. A solid-state lithium battery with spin-pressurized packaging as described in claim 1, characterized in that, The worm length is greater than the width of the housing; or the worm length is greater than the length of the housing.

4. A solid-state lithium battery with spin-pressurized packaging as described in claim 1, characterized in that, The lead angle of the worm gear is smaller than the friction angle.

5. A solid-state lithium battery with spin-pressurized packaging as described in claim 1, characterized in that, A buffer structure is provided between the solid-state lithium battery module and the pressure plate.

6. A solid-state lithium battery with spin-pressurized packaging as described in claim 5, characterized in that, The buffer structure is made of soft rubber or plastic.

7. A solid-state lithium battery with spin-pressurized packaging as described in claim 5, characterized in that, The buffer structure is a stacked spring group or a spring series / parallel group structure.

8. A solid-state lithium battery with spin-pressurized packaging as described in claim 1, characterized in that, A side plate is installed on the side of the housing, and the side plate has a through hole.

9. A motion mechanism, characterized in that, A solid-state lithium battery with a spin-pressurized package as described in any one of claims 1-8 is used.

10. A vehicle, characterized in that, A solid-state lithium battery with a spin-pressurized package as described in any one of claims 1-8 is used.

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