An isostatic pressing device for preparing all-solid-state batteries

Abstract

The utility model provides a kind of isostatic pressing preparation frock of all-solid-state battery: including bottom plate and pressing plate, the end face of bottom plate and pressing plate is oppositely equipped with plastic shaping groove, the bottom plate can be detachably connected on pressing plate, and make two plastic shaping grooves form the cavity for battery accommodation by enclosing;The sidewall of bottom plate and pressing plate is equipped with through groove, and the through groove is communicated with corresponding plastic shaping groove;The utility model can place all-solid-state soft package battery in the plastic shaping groove of bottom plate first during the compaction process of battery, then connect pressing plate to bottom plate, finally place it into isostatic pressing equipment;During the process of pressure exerted by hydraulic mechanism, all-solid-state soft package battery will be limited by plastic shaping groove in the preparation frock, so that the surface of all-solid-state soft package battery is relatively flat, avoid the deformation of all-solid-state soft package battery due to uneven density, prevent pole lug breakage, improve the yield of product.

Description

Technical Field

[0001] This utility model relates to the technical field of battery isostatic pressing preparation apparatus, specifically a tooling for preparing all-solid-state batteries using isostatic pressing. Background Technology

[0002] All-solid-state batteries are batteries that use solid electrodes and solid electrolytes, which can greatly improve the energy density of the battery. During the manufacturing process, all-solid-state pouch batteries need to be placed in an isostatic pressing chamber, where a hydraulic mechanism applies equal pressure to all surfaces of the battery, ultimately compacting it into shape.

[0003] However, the materials and densities of different parts of an all-solid-state pouch battery vary, which makes it prone to deformation during the isostatic pressing process, thus affecting product quality. This is especially true at the tab connection point of the all-solid-state pouch battery; due to the significant density difference between the tab and battery materials, the tab connection point is squeezed, bent, or even broken during compaction, resulting in defective products. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the defects of the prior art and provide an isostatic pressing tooling for all-solid-state batteries that will not deform during the compaction process of soft-pack batteries.

[0005] The technical solution of this utility model is to provide an isostatic pressing tooling for preparing all-solid-state batteries with the following structure:

[0006] The device includes a base plate and a pressure plate. Each of the base plate and the pressure plate has a molding groove on one of their opposite ends. The base plate is detachably connected to the pressure plate, and the two molding grooves enclose each other to form a cavity for accommodating the battery. Each of the side walls of the base plate and the pressure plate has a through groove, which is connected to the corresponding molding groove.

[0007] With the above structure, the isostatic pressing tooling for all-solid-state batteries in this invention has the following advantages compared with the prior art:

[0008] In the battery compaction process, this invention allows the all-solid-state pouch battery to be first placed in the molding groove of the base plate, then the pressure plate is connected to the base plate, and finally placed into the isostatic pressing equipment. During the pressure applied by the hydraulic mechanism, the all-solid-state pouch battery is restricted by the molding groove in the preparation tooling, thereby making the surface of the all-solid-state pouch battery relatively flat, avoiding deformation caused by uneven density, preventing the tabs from breaking, and improving the product yield.

[0009] Preferably, a clamping plate is provided between the base plate and the pressure plate, and the two end faces of the clamping plate are respectively attached to the base plate and the pressure plate; the two side walls of the clamping plate are provided with the shaping grooves, and the two shaping grooves on the clamping plate are respectively enclosed with the shaping grooves on the corresponding base plate and the pressure plate to form the cavity; in this way, two all-solid-state soft-pack batteries can be subjected to isostatic pressing at one time, improving work efficiency.

[0010] Preferably, the clamping plates are multiple and stacked, with the shaping grooves of two adjacent clamping plates forming the cavity. This allows the user to place multiple clamping plates between the base plate and the pressure plate, thereby compacting multiple all-solid-state soft-pack batteries at once, further improving work efficiency. The specific number of clamping plates can be determined according to the size of the isostatic pressing equipment cavity to avoid the overall size of the preparation fixture being too large to fit into the isostatic pressing equipment cavity.

[0011] Preferably, both the base plate and the pressure plate include a plate body, an upper plate, and a lower plate. The upper plate and the lower plate are connected to the same end face of the plate body and are symmetrically arranged. Each of the upper plate and the lower plate has a groove at one end facing each other, and the two grooves together form the molding groove. This arrangement facilitates part processing and ensures the precision of the parts. The upper plate and the lower plate can be fixedly connected to the plate body with screws, making assembly relatively convenient.

[0012] Preferably, the upper plate and the lower plate are spaced apart on the plate body, and the gap between the upper plate and the lower plate forms the through groove. When the upper plate and the lower plate are fixed to the plate body, the spaced arrangement of the upper plate and the lower plate automatically forms the through groove, eliminating the need for additional processing and reducing processing steps.

[0013] Preferably, elastic layers are provided on the opposing end faces of the base plate and pressure plate, as well as on both end faces of the clamping plate. Since the base plate, pressure plate, and clamping plate are made of metal, which has a large density difference from that of the all-solid-state pouch battery, elastic layers are added to the base plate, pressure plate, and clamping plate to prevent deformation during the compaction process of the all-solid-state pouch battery.

[0014] Preferably, the pressure plate is provided with a first through hole, and the clamping plate and the base plate are respectively provided with a second through hole and a third through hole at the position corresponding to the first through hole. A bolt is connected to the first through hole, and a nut that matches the bolt is connected to the third through hole. The free end of the bolt passes through the first through hole and the second through hole and is threadedly connected to the nut in the third through hole.

[0015] Preferably, the base plate is equipped with a hanging lug for connecting a pull rope. Since harmful substances may enter the hydraulic solution during the compaction process of the all-solid-state pouch battery, to avoid human contact, the hanging lug can be connected to the fixture, and then a pull rope can be used for connection. When the fixture needs to be removed, simply lift the pull rope. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the structure of this utility model when unfolded.

[0018] Figure 3 This is a schematic diagram of the structure of the base plate in this utility model.

[0019] Explanation of reference numerals in the attached figures:

[0020] 1. Base plate, 2. Pressure plate, 3. Shaping groove, 4. Through groove, 5. Clamping plate, 6. Plate body, 7. Upper plate, 8. Lower plate, 9. Bolt, 10. Nut, 11. Hanging lug. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0022] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element 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. At the same time, the terms "first", "second", etc., are only used to distinguish the names of various components and do not have a primary or secondary relationship. Therefore, they should not be construed as limitations on this utility model.

[0023] like Figures 1-3 As shown, this utility model discloses an isostatic pressing tooling for preparing all-solid-state batteries: it includes a base plate 1 and a pressure plate 2. A molding groove 3 is provided on one end face of the base plate 1 and the pressure plate 2 facing each other. The base plate 1 is detachably connected to the pressure plate 2, and the two molding grooves 3 are enclosed to form a cavity for accommodating the battery. A through groove 4 is provided on both side walls of the base plate 1 and the pressure plate 2, and the through groove 4 is connected to the corresponding molding groove 3.

[0024] In the battery compaction process, the all-solid-state pouch battery can be placed in the molding groove of the base plate 1 first, then the pressure plate 2 is connected to the base plate 1, and finally it is placed in the isostatic pressing equipment. During the process of the hydraulic mechanism applying pressure, the all-solid-state pouch battery will be restricted by the molding groove in the preparation tooling, so that the surface of the all-solid-state pouch battery is relatively flat, avoiding deformation caused by uneven density, preventing the tabs from breaking, and improving the yield of the product.

[0025] A clamping plate 5 is also provided between the base plate 1 and the pressure plate 2. The two ends of the clamping plate 5 are respectively attached to the base plate 1 and the pressure plate 2. The two side walls of the clamping plate 5 are also provided with shaping grooves 3. The two shaping grooves 3 on the clamping plate 5 are respectively enclosed with the corresponding shaping grooves 3 on the base plate 1 and the pressure plate 2 to form cavities for accommodating the batteries. In this way, two all-solid-state soft-pack batteries can be subjected to isostatic pressure treatment at one time, thereby improving work efficiency.

[0026] There can be multiple clamping plates 5, which are stacked and arranged in layers. The shaping grooves 3 of two adjacent clamping plates 5 enclose a cavity for accommodating the battery. Multiple clamping plates 5 are set between the base plate 1 and the pressure plate 2, which can compact multiple all-solid-state soft-pack batteries at one time, further improving work efficiency. The specific number of clamping plates 5 can be determined according to the size of the isostatic pressing equipment cavity to avoid the overall size of the preparation tooling being too large to fit into the isostatic pressing equipment cavity.

[0027] Both the base plate 1 and the pressure plate 2 include a plate body 6, an upper plate 7, and a lower plate 8. The upper plate 7 and the lower plate 8 are connected to the same end face of the plate body 6 and are symmetrically arranged. Each of the upper plate 7 and the lower plate 8 has a groove at one end facing each other, and the two grooves together form a molding groove 3. This arrangement facilitates part processing and ensures part precision. The upper plate 7 and the lower plate 8 can be fixed to the plate body 6 with screws, making assembly relatively convenient. The clamping plate 5 has a similar structure to the base plate 1 and the pressure plate 2, consisting of a plate body 6 and two upper plates 7 and a lower plate 8. Both ends of the plate body 6 are connected to a set of upper plates 7 and lower plates 8 respectively by screws, making processing and assembly equally convenient.

[0028] The upper plate 7 and the lower plate 8 are spaced apart on the corresponding plate body 6, and the gap between the upper plate 7 and the lower plate 8 forms a through groove 4. When the upper plate 7 and the lower plate 8 are fixed to the plate body 6, the spaced upper plate 7 and the lower plate 8 can automatically form the through groove 4 without additional processing, thus reducing processing steps.

[0029] Since the base plate 1, pressure plate 2 and clamping plate 5 are made of metal, their density differs greatly from that of the all-solid-state soft-pack battery. Therefore, an elastic layer is added to the facing end faces of the base plate 1 and pressure plate 2 and the two end faces of the clamping plate 5 to prevent deformation during the compaction process of the all-solid-state soft-pack battery.

[0030] The pressure plate 2 is provided with a first through hole, and the clamping plate 5 and the base plate 1 are respectively provided with a second through hole and a third through hole at the corresponding positions. A bolt 9 is connected to the first through hole, and a nut 10 that matches the bolt 9 is connected to the third through hole. The free end of the bolt 9 passes through the first through hole and the second through hole and is threadedly connected to the nut 10 in the third through hole.

[0031] Since harmful substances may enter the hydraulic solution during the compaction process of the all-solid-state soft-pack battery, in order to avoid human contact, a hanging lug 11 can be connected to the base plate 1 of the tooling, and then a pull rope can be used to connect it. When the tooling needs to be removed, simply lift the pull rope.

[0032] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A tooling for isostatic pressing of all-solid-state batteries, characterized in that: The device includes a base plate (1) and a pressure plate (2). The base plate (1) and the pressure plate (2) are provided with a molding groove (3) on their opposite end faces. The base plate (1) is detachably connected to the pressure plate (2) and the two molding grooves (3) are enclosed to form a cavity for accommodating the battery. The side walls of the base plate (1) and the pressure plate (2) are provided with through grooves (4) and the through grooves (4) are connected to the corresponding molding grooves (3).

2. The isostatic pressing tooling for all-solid-state batteries according to claim 1, characterized in that: A clamping plate (5) is also provided between the base plate (1) and the pressure plate (2). The two ends of the clamping plate (5) are respectively attached to the base plate (1) and the pressure plate (2). The two side walls of the clamping plate (5) are provided with the shaping groove (3). The two shaping grooves (3) on the clamping plate (5) are respectively enclosed with the shaping grooves (3) on the corresponding base plate (1) and the pressure plate (2) to form the cavity.

3. The isostatic pressing tooling for all-solid-state batteries according to claim 2, characterized in that: The clamping plates (5) are multiple and stacked, and the shaping grooves (3) of two adjacent clamping plates (5) enclose each other to form the cavity.

4. The isostatic pressing tooling for all-solid-state batteries according to claim 1, characterized in that: The base plate (1) and the pressure plate (2) both include a plate body (6), an upper plate (7) and a lower plate (8). The upper plate (7) and the lower plate (8) are connected to the same end face of the plate body (6) and are symmetrically arranged. The upper plate (7) and the lower plate (8) are provided with grooves at opposite ends, and the two grooves enclose each other to form the shaping groove (3).

5. The isostatic pressing tooling for all-solid-state batteries according to claim 4, characterized in that: The upper plate (7) and the lower plate (8) are spaced apart on the plate body (6), and the gap between the upper plate (7) and the lower plate (8) forms the through groove (4).

6. The isostatic pressing tooling for all-solid-state battery fabrication according to claim 2, characterized in that: The bottom plate (1) and the pressure plate (2) facing each other, as well as the two ends of the clamping plate (5), are provided with elastic layers.

7. The isostatic pressing tooling for all-solid-state batteries according to claim 2, characterized in that: The pressure plate (2) is provided with a first through hole. The clamping plate (5) and the base plate (1) are respectively provided with a second through hole and a third through hole at the position corresponding to the first through hole. A bolt (9) is connected to the first through hole. A nut (10) matching the bolt (9) is connected in the third through hole. The free end of the bolt (9) passes through the first through hole and the second through hole and is threadedly connected to the nut (10) in the third through hole.

8. The isostatic pressing tooling for all-solid-state batteries according to claim 1, characterized in that: The base plate (1) is connected to a hanging lug (11) for connecting a pull rope.

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