Isostatic pressing clamp for all-solid-state soft package battery

Abstract

The utility model discloses an all-solid-state soft package battery isostatic pressing clamp which comprises at least two clamping plates, the at least two clamping plates are overlapped in the vertical direction, every two adjacent clamping plates are in relative sliding limiting fit in the vertical direction, and isostatic pressing hollowed-out parts are arranged on the opposite binding faces of every two adjacent clamping plates. And the isostatic pressing hollow part penetrates through other outer surfaces and the binding surface of the clamping plate. A fluid medium enters the isostatic pressing hollow part from the outside, then is in contact with the surface of the battery, pressurizes the battery from the surface of the battery, and acts on the upper surface and the lower surface of the all-solid-state soft package battery along the vertical direction through the two adjacent clamping plates, so that the battery is in a relatively flat state during isostatic pressure reduction; therefore, the battery cannot be bent and deformed towards the two large surfaces even in an isostatic pressing high-pressure state, so that the problem that the whole battery is bent and deformed due to the compression of the internal volume of the battery is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of all-solid-state flexible battery production equipment, and particularly relates to an isostatic pressing fixture for all-solid-state flexible batteries. Background Technique

[0002] Since the electrolyte of the current all-solid-state flexible battery is a solid material, which is embedded between the anode and the cathode in the form of a sandwich, in order to eliminate the pores and voids in a single battery and improve the contact effect between the components at the interface in the all-solid-state single battery, thereby enhancing the conductivity, increasing the energy density, reducing the volume change during operation, and the enhanced conductivity will endow the battery with more excellent electrochemical performance. The isostatic pressing technology is the key technology to solve the commercial scale production of all-solid-state batteries in the production process of all-solid-state batteries.

[0003] When the current battery undergoes the isostatic pressing process, the single battery is manually placed into the cavity of the isostatic pressing machine to perform the isostatic pressing process of the all-solid-state battery and other operations. After isostatic pressing, the battery will be bent and deformed as a whole due to the volume compression inside the battery. There are problems such as an increased risk of battery short circuit caused by the rupture of the electrode sheet and low battery performance, and the battery is prone to shift during pressurization. Content of the Utility Model

[0004] The purpose of the utility model is to provide an isostatic pressing fixture for all-solid-state flexible batteries to solve one or more technical problems existing in the prior art, and at least provide a beneficial choice or creation condition.

[0005] The technical solution adopted to solve the above technical problems:

[0006] The utility model provides an isostatic pressing fixture for all-solid-state flexible batteries, including:

[0007] Clamping plates, at least two clamping plates are provided, and at least two of the clamping plates are stacked in the up and down direction. Adjacent two of the clamping plates are in relative sliding limit fit in the up and down direction. Equal-pressure hollow parts are provided on the opposite joint surfaces of adjacent two of the clamping plates, and the equal-pressure hollow parts penetrate through the other outer surfaces and joint surfaces of the clamping plates.

[0008] The beneficial effect of the utility model is:

[0009] When isostatic pressing the battery, open two adjacent clamping plates, then place the battery to be isostatic pressed between the two clamping plates. Under the self-gravity of the upper clamping plate, the two adjacent clamping plates are clamped together to achieve pre-clamping of the battery in the isostatic pressing chamber. At the same time, the fluid medium enters the isostatic pressing hollow part from the outside, then contacts the surface of the battery, and presses the battery from the surface of the battery. Both large surfaces (upper surface and lower surface) of the all-solid-state soft-pack battery are simultaneously clamped by the gravity of the clamping plates of the isostatic pressing fixture between the clamping plates. At the same time, the two adjacent clamping plates are in sliding limit fit in the up and down directions, and the isostatic pressing pressure also acts on the clamping plates, and acts on the upper surface and the lower surface of the all-solid-state soft-pack battery through the two adjacent clamping plates in the up and down directions. When performing equal pressure reduction, the battery is in a relatively flat state, so even under the high pressure of isostatic pressing, the battery cannot bend and deform in the direction of the two large surfaces, thus solving the problem of overall bending deformation caused by the compression of the internal volume of the battery.

[0010] As a further improvement of the above technical solution, at least two of the clamping plates are connected with a sliding limit structure, and the sliding limit structure is used to form a feeding gap between two adjacent clamping plates when the bottom of the isostatic pressing fixture is suspended.

[0011] During use, the upper clamping plate is driven to lift by the hydraulic mechanism of the current isostatic press equipment for opening the cover and closing the cover. When the isostatic pressing chamber opens and closes the cover, it can simultaneously drive the clamping plates on the isostatic pressing fixture to open and overlap each other, and form a feeding gap for placing the battery between two adjacent clamping plates. It can be understood that the function of the sliding limit structure can make the isostatic pressing fixture in a suspended state, that is, when the isostatic pressing chamber opens the cover, all the clamping plates can be opened with each other to form a feeding gap, and when the isostatic pressing chamber closes the cover, it can also make all the clamping plates overlap each other, improving the production rhythm to improve efficiency, and at the same time realizing pre-clamping of the battery in the isostatic pressing chamber.

[0012] As a further improvement of the above technical solution, at least three clamping plates are provided, and at least three clamping plates include a bottom layer clamping plate at the bottom, a top layer clamping plate at the top, and at least one middle layer clamping plate between the bottom layer clamping plate and the top layer clamping plate. Equal pressure hollow parts are provided on both the top surface and the bottom surface of the middle layer clamping plate, and a through groove communicating with the two equal pressure hollow parts is provided in the middle of the side surface of the middle layer clamping plate.

[0013] For the middle layer clamping plate between the bottom layer clamping plate and the top layer clamping plate, in order to enable the fluid medium to enter the equal pressure hollow parts on the upper and lower surfaces, a through groove is provided in the middle of the side surface of the middle layer clamping plate, and the fluid medium flows into the equal pressure hollow parts on both sides of the upper and lower sides of the middle layer clamping plate through the through groove, so that the fluid medium pressures in the equal pressure hollow parts on the upper and lower sides of the battery are the same, ensuring the isostatic pressing quality of the all-solid-state soft-pack battery.

[0014] As a further improvement of the above technical solution, the isostatic pressing hollow part is provided with a plurality of through holes, the plurality of through holes are arranged to penetrate up and down, and the through holes on the top surface and the bottom surface of the middle layer clamping plate are all communicated with the through groove, and a base is provided at the bottom of the bottom layer clamping plate.

[0015] The fluid medium flows into the plurality of through holes to contact the surface of the battery and apply pressure, so as to increase the acting force of the pressure. The bottom of the bottom layer clamping plate contacts the bottom of the isostatic pressing chamber through the base, so that the through holes on the bottom of the bottom layer clamping plate are suspended, facilitating the inflow of the fluid medium.

[0016] As a further improvement of the above technical solution, the middle layer clamping plate includes two partition plates that are fixedly attached up and down, and flow grooves are provided on the mutually attached surfaces of the two partition plates, and the two flow grooves are combined to form the through groove.

[0017] For the forming of the middle layer clamping plate, this solution is formed by fitting and fixing two partition plates. During production, the flow grooves and through holes can be processed separately on the partition plates, and then the two partition plates are fitted and fixed together to form a middle layer clamping plate with through holes formed on both the upper and lower surfaces.

[0018] As a further improvement of the above technical solution, the sliding limit structure includes a plurality of guide posts and a plurality of limit connection rings. The guide posts are fixedly connected to the bottom layer clamping plate, and the guide posts are simultaneously slidably connected to the middle layer clamping plate and the top layer clamping plate up and down. The upper end and the lower end of the limit connection ring are respectively slidably and limit-connected to the adjacent two clamping plates above the bottom layer clamping plate.

[0019] As a further improvement of the above technical solution, a contact limit member that is in limit contact with the top surface of the top layer clamping plate is provided at the upper end of the guide post. When the isostatic pressing fixture is in the open state, the contact limit member is the main force-bearing component when the entire isostatic pressing fixture is opened, avoiding excessive force on the limit connection ring and accelerating the fatigue fracture of the metal, resulting in the detachment of the fixture.

[0020] As a further improvement of the above technical solution, the limit connection ring is provided with a limit sliding groove extending up and down, and at least one sliding limit member is provided on the side surface of the clamping plate above the bottom layer clamping plate, and the upper end and the lower end of the limit sliding groove are respectively slidably connected to the sliding limit members on the adjacent two clamping plates.

[0021] When the top clamping plate moves upward to the limit length of the limit sliding groove as the isostatic pressing chamber cover is opened, under the connection action of the limit sliding groove and the sliding limit member, the next clamping plate is driven to move upward, and so on, driving the other clamping plates to move upward in sequence to form a multi-layer feeding gap; when the top clamping plate moves downward as the isostatic pressing chamber cover is closed, first the entire isostatic pressing fixture moves downward. When the bottom clamping plate contacts the bottom of the isostatic pressing chamber of the isostatic pressing cavity body, the top clamping plate continues to move downward. The middle clamping plate and the top clamping plate above the bottom clamping plate continue to move linearly downward under the gravity of the guiding column and themselves. The middle clamping plate above the bottom clamping plate contacts and presses the battery at the bottom and stops moving downward. Subsequently, the top clamping plate continues to move downward, and the other clamping plates above also move downward. At this time, the bottom limit sliding groove moves downward relative to the sliding limit member. The second middle clamping plate or the top clamping plate counted from the bottom contacts the battery above and stops moving downward. By analogy, all the clamping plates above the bottom clamping plate clamp all the batteries to be isostatically pressed in the isostatic pressing fixture under their own gravity.

[0022] Moreover, the opening and closing of the isostatic pressing fixture of the present utility model follow the opening and closing actions of the isostatic pressing chamber, enabling the opening and closing actions of the isostatic pressing fixture. Without the need to additionally increase a power device on the basis of ordinary isostatic pressing equipment, the automatic isostatic pressing of all-solid-state soft-pack batteries can be achieved.

[0023] As a further improvement of the above technical solution, a quick-connect type second connecting portion is connected to the top surface of the top clamping plate.

[0024] During use, the top clamping plate is detachably connected to the upper cover of the isostatic pressing chamber through the second connecting portion, and different isostatic pressing fixtures can be replaced according to different batteries.

[0025] As a further improvement of the above technical solution, a plurality of material clamping grooves are provided on the opposite fitting surfaces of two adjacent clamping plates, and the isostatic pressing hollow portion is located in the material clamping grooves.

[0026] During use, the battery is placed in the material clamping grooves, and the battery is clamped and positioned through the upper and lower material clamping grooves to avoid the phenomenon of the battery tilting during the placement process, so as to ensure that the isostatic pressing hollow portion is opposite to the surface of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The following further describes the present utility model with reference to the drawings and embodiments;

[0028] Figure 1 It is a schematic structural diagram of an isostatic pressing device provided by the present invention in one embodiment;

[0029] Figure 2 It is a side view of an isostatic pressing device provided by the present invention in one embodiment;

[0030] Figure 3 is a schematic structural diagram of an isostatic pressing fixture provided by the present invention in one embodiment;

[0031] Figure 4 is a front sectional view of an isostatic pressing fixture provided by the present invention in one embodiment.

[0032] Reference numerals:

[0033] Isostatic pressing fixture 100; material placing gap 110; material clamping groove 111; through hole 120; bottom clamping plate 130; base 131; top clamping plate 140; second connecting plate 141, second groove 1411; middle clamping plate 150; through slot 151; partition plate 152; flow-through groove 1521; guiding column 160; abutting limiting member 161; limiting connection ring 171; limiting sliding groove 1711; sliding limiting member 172;

[0034] Isostatic pressing cavity 200; upper cover 210; first connecting plate 211; first groove 2111; limiting block 2112; isostatic pressing chamber 220; fluid medium pipe joint 230;

[0035] Battery 300. Detailed implementation manners

[0036] This part will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the drawings. The role of the drawings is to supplement the description of the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present utility model. However, it should not be construed as a limitation on the protection scope of the present utility model.

[0037] In the description of the present utility model, it should be understood that for the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc., is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present utility model.

[0038] In the description of the present utility model, if there are descriptions with words such as "several", its meaning is one or more, and the meaning of multiple is more than two. Understanding greater than, less than, exceeding, etc. does not include the present number, and understanding above, below, within, etc. includes the present number.

[0039] In the description of the present utility model, unless otherwise clearly defined, words such as setting, installation, connection, etc. should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meanings of the above words in the present utility model in combination with the specific content of the technical solution.

[0040] like Figure 1 and 2 As shown, when in use, the isostatic pressing fixture 100 of the embodiment of the utility model needs to be used together with the isostatic pressing component and the pressurizing component to form an isostatic pressing device, wherein the isostatic pressing component includes an isostatic pressing chamber 200, a cover opening mechanism, and a pressurizing component, such as Figure 1 and Figure 2 As shown, an upper cover 210 is provided on the top of the isostatic pressure chamber 200, and the upper cover 210 is used to seal the top of the isostatic pressure chamber 200. After the upper cover 210 is sealed on the top of the isostatic pressure chamber 200, an isostatic pressure chamber 220 can be formed inside the isostatic pressure chamber 200. It can be understood that the isostatic pressure chamber 200 is a box structure with an opening facing upward, and the upper cover 210 is detachably sealed on the top of the isostatic pressure chamber 200.

[0041] The cover-opening mechanism is used to drive the upper cover 210 and the isostatic pressure chamber 200 to move away from and towards each other in the up and down directions. Generally, the isostatic pressure chamber 200 is fixed, and the cover-opening mechanism is transmission-connected with the upper cover 210. The cover-opening mechanism drives the upper cover 210 to move up and down to realize the opening and closing actions of the upper cover 210. The cover-opening mechanism realizes the up and down movement of the upper cover 210 through a hydraulic drive mechanism.

[0042] The pressurizing component is used to inject fluid medium into the isostatic pressure chamber 220 and pressurize it. The isostatic pressure chamber 200 is connected to the fluid medium pipe joint 230. The isostatic pressure chamber 200 is connected to the pressurizing component through the fluid medium pipe joint 230. The fluid medium is injected into the isostatic pressure chamber 220 and pressurized through the pressurizing component. The pressure and time of pressurization are set according to the isostatic pressing requirements of the battery 300.

[0043] The cover opening mechanism and the pressurizing assembly are the main components of a common isostatic press and will not be described in detail here.

[0044] The isostatic pressing fixture 100 of the embodiment of the present invention is arranged in the isostatic pressing chamber 220. Figure 3 and Figure 4 As shown, the isostatic pressing fixture 100 includes a splint, at least two of which are provided, at least two of which are overlapped in the up-down direction, two adjacent splints are relatively slidably limited in the up-down direction, and the relative fitting surfaces of the two adjacent splints are provided with isostatic pressing hollow parts, and the isostatic pressing hollow parts penetrate the other outer surfaces and fitting surfaces of the splints.

[0045] When isostatic pressing the battery 300, two adjacent clamping plates are opened, and then the battery 300 to be isostatically pressed is placed between the two clamping plates. Under the self-weight of the upper clamping plate, the two adjacent clamping plates are clamped together to achieve pre-clamping of the battery 300 in the isostatic pressing chamber 220. At the same time, the fluid medium enters the isostatic pressing hollow part from the outside, then contacts the surface of the battery 300, and presses the battery from the surface of the battery 300. Both large surfaces (the upper surface and the lower surface) of the battery 300 are clamped by the gravity of the clamping plates between the clamping plates of the isostatic pressing fixture 100 at the same time. At the same time, the two adjacent clamping plates are in sliding limit fit in the up and down direction, and the isostatic pressing pressure also acts on the clamping plates. The two adjacent clamping plates act on the upper surface and the lower surface of the all-solid-state soft-pack battery in the up and down direction. When isostatic decompression is carried out, the battery 300 is in a relatively flat state. Therefore, even under the high pressure of isostatic pressing, the battery 300 cannot bend and deform in the direction of the two large surfaces, thus solving the problem of overall bending deformation caused by the compression of the internal volume of the battery 300.

[0046] Moreover, in the embodiment of the present invention, a sliding limit structure is connected between at least two clamping plates. The sliding limit structure is used to form a material placing gap 110 between two adjacent clamping plates when the bottom of the isostatic pressing fixture 100 is suspended, as Figure 4 shown.

[0047] During use, the upper clamping plate moves up and down with the upper cover 210. When the isostatic pressing chamber 220 is opened and closed, the clamping plates on the isostatic pressing fixture 100 can be driven to open and overlap each other at the same time, and a material placing gap 110 for placing the battery is formed between two adjacent clamping plates. It can be understood that the function of the sliding limit structure can make the isostatic pressing fixture 100 in a suspended state, that is, when the isostatic pressing chamber 220 is opened, all the clamping plates can be opened with each other to form a material placing gap 110, and when the isostatic pressing chamber 220 is closed, all the clamping plates can also be overlapped together, improving the production rhythm to improve the efficiency, and at the same time realizing pre-clamping of the battery 300 in the isostatic pressing chamber 220.

[0048] It can be understood that when the isostatic pressing fixture 100 is suspended, that is, there is no support point under the bottom clamping plate. At this time, a material placing gap 110 is formed between every two adjacent clamping plates. If there is a support point under the bottom clamping plate and the bottom clamping plate is supported, when the upper clamping plate at the top moves down with the upper cover 210, all the clamping plates are overlapped with each other from top to bottom in turn, and the material placing gap 110 disappears at this time, that is, the opening and closing of the isostatic pressing fixture 100 can be realized.

[0049] In some embodiments, for the number of clamping plates, it can be determined according to the actual situation. If two clamping plates are set, a layer of material placing gap 110 is formed. If three clamping plates are set, two layers of material placing gaps 110 are formed.

[0050] The isostatic pressing hollow part of this embodiment is a plurality of through holes 120, which penetrate up and down. The fluid medium enters through the through holes 120 to contact the surface of the battery 300, and also ensures that the fluid medium can press the battery 300 from the surface of each battery 300.

[0051] In some embodiments, the isostatic pressing hollow part can adopt a notch structure.

[0052] In some embodiments, in order to improve the production efficiency of the battery 300, at least three clamping plates are provided, forming at least two material placing gaps 110. The at least three clamping plates include a bottom layer clamping plate 130 at the bottom, a top layer clamping plate 140 at the top, and at least one middle layer clamping plate 150 between the bottom layer clamping plate 130 and the top layer clamping plate 140. In this embodiment, three clamping plates are provided, and one middle layer clamping plate 150 is provided between the bottom layer clamping plate 130 and the top layer clamping plate 140.

[0053] Among them, a plurality of through holes 120 are provided on both the top surface and the bottom surface of the middle layer clamping plate 150. For the middle layer clamping plate 150 located between the bottom layer clamping plate 130 and the top layer clamping plate 140, in order to enable the fluid medium to enter the through holes 120 on the upper and lower surfaces, a through groove 151 communicating with the through holes 120 on the upper and lower surfaces is provided in the middle of the side surface of the middle layer clamping plate 150. The fluid medium flows into the through holes 120 on the upper and lower surfaces of the middle layer clamping plate 150 through the through groove 151, so that the fluid medium pressures of the through holes 120 on the upper and lower sides of the battery 300 are the same, ensuring the isostatic pressing quality of the battery 300.

[0054] The middle layer clamping plate 150 of this embodiment includes two partition plates 152, and the two partition plates 152 are stacked and fixed together. Flow grooves 1521 are provided on the mutually contacting surfaces of the two partition plates 152, and the two flow grooves 1521 are combined to form a through groove 151.

[0055] Furthermore, a plurality of material clamping grooves 111 are provided on the opposite surfaces of the two clamping plates on the upper side and the lower side of the material placing gap 110. A plurality of through holes 120 are evenly distributed at the bottom of each material clamping groove 111. During processing, the battery 300 is placed in the material clamping grooves 111, and the battery 300 is clamped and positioned by the upper and lower material clamping grooves 111 to avoid the phenomenon of tilting when the battery 300 is put in, so as to ensure that the isostatic pressing hollow part is opposite to the surface of the battery 300.

[0056] The sliding limit structure includes a plurality of guide posts 160 and a plurality of limit connection rings 171. In this embodiment, four guide posts 160 are provided, and the four guide posts 160 are distributed in a rectangular shape at the four corners of the isostatic pressing fixture 100.

[0057] Among them, the lower end of the guide post 160 is fixedly connected to the bottom clamping plate 130. The guide post 160 is simultaneously connected to the middle clamping plate 150 and the top clamping plate 140 for up and down sliding connection. Sliding holes that are slidably matched with the guide post 160 are provided on the middle clamping plate 150 and the top clamping plate 140. All the clamping plates are guided by a plurality of guide posts 160. Under the guiding action of the guide posts 160, it can be ensured that the clamping plates move relative to each other in parallel. The clamping plates press the batteries 300 against each other in the up and down direction, so that all the batteries 300 are in a relatively flat state for isostatic pressing.

[0058] The upper end and the lower end of the limit connection ring 171 are respectively connected to two adjacent clamping plates above the bottom clamping plate 130 in a sliding and limiting manner. Specifically, the limit connection ring 171 is provided with a limit sliding groove 1711 extending up and down. At least one sliding limit member 172 is provided on the side surface of each clamping plate above the bottom clamping plate 130. The upper end and the lower end of the limit sliding groove 1711 are respectively slidably connected to the sliding limit members 172 on two adjacent clamping plates.

[0059] When the top clamping plate 140 moves upward to the limit length distance of the limit sliding groove 1711, under the connection action of the limit sliding groove 1711 and the sliding limit member 172, the next clamping plate is driven to move upward, and so on, driving the successive upward movement of other clamping plates in turn to form a multi-layer feeding gap 110. When the top clamping plate 140 moves downward with the upper cover 210, first, the whole static pressure fixture moves downward. When the bottom clamping plate 130 contacts the bottom of the isostatic pressing chamber 220 of the isostatic pressing cavity 200, the top clamping plate 140 continues to move downward with the upper cover 210. The middle clamping plate 150 and the top clamping plate 140 above the bottom clamping plate 130 continue to move linearly downward under the action of the guide post 160 and their own gravity. The middle clamping plate 150 above the bottom clamping plate 130 contacts and presses the bottom battery 300 and stops moving downward. Subsequently, the upper cover 210 continues to move downward, and the other clamping plates above also move downward accordingly. At this time, the bottom limit sliding groove 1711 moves downward relative to the sliding limit member 172. The second middle clamping plate 150 or the top clamping plate 140 from the bottom up contacts the upper battery 300 and stops moving downward, and so on, realizing that all the clamping plates above the bottom clamping plate 130 clamp the batteries 300 to be isostatically pressed in the isostatic pressing fixture 100 under their own gravity.

[0060] Among them, the sliding limit member 172 is a screw structure.

[0061] In order to improve the firmness of the connection between the clamping plates, in this embodiment, two limit connection rings 171 are provided on both sides between the middle clamping plate 150 and the top clamping plate 140.

[0062] To avoid excessive stress on the limit connection ring 171 and the sliding limit member 172, which may accelerate the fatigue fracture of the metal and cause the fixture to fall off, a contact limit member 161 that contacts and limits the top surface of the top clamping plate 140 is provided at the upper end of the guide post 160. When the isostatic pressing fixture 100 is in the open state, the contact limit member 161 is the main stress-bearing component when the entire isostatic pressing fixture 100 is opened. The contact limit member 161 is a screw structure, which is convenient for disassembly and assembly.

[0063] Moreover, at least two bases 131 are provided at the bottom of the bottom clamping plate 130 in this embodiment. The bases 131 can ensure that the bottom of the bottom clamping plate 130 is in a suspended state in the isostatic pressing chamber 220 for the isostatic pressing fixture 100.

[0064] In addition, a quick-connect second connection portion is connected to the top surface of the top clamping plate 140. During use, the top clamping plate 140 is detachably connected to the upper cover 210 through the second connection portion, and different isostatic pressing fixtures 100 can be replaced according to different batteries 300.

[0065] Specifically, a second connection portion is provided at the bottom of the upper cover 210. The first connection portion includes two first grooves 2111 that are spaced apart from each other in the first direction in the lateral direction. The second connection portion includes two second grooves 1411 that are spaced apart from each other in the opposite direction in the first direction in the lateral direction. The two first grooves 2111 and the two second grooves 1411 are snap-fitted to each other in the second direction in the lateral direction, enabling the isostatic pressing fixture 100 to be detachably removed from the side of the bottom of the upper cover 210, where the first direction and the second direction are perpendicular to each other.

[0066] As Figure 2 and Figure 3 shown, the first connection portion is two first connecting plates 211 that are C-shaped in the front view. The first connecting plates 211 are connected to the bottom of the upper cover 210, and the first grooves 2111 are formed on the inner sides of the first connecting plates 211. The second connection portion is two second connecting plates 141 that are C-shaped in the front view. The second grooves 1411 are formed on the outer sides of the second connecting plates 141, and the second connecting plates 141 are connected to the top of the top clamping plate 140.

[0067] Moreover, limit blocks 2112 that contact and limit the end faces of the second grooves 1411 are detachably provided at both ends of the first grooves 2111. The limit blocks 2112 are fixed to both ends of the first connecting plates 211 by hexagon socket head cap screws, which can effectively prevent the isostatic pressing fixture 100 from moving and falling off or interfering with the running track of the upper cover 210 during the operation of the equipment, resulting in a collision.

[0068] The embodiment of the present invention also provides an isostatic pressing method, including:

[0069] Step S100: Using an isostatic pressing device;

[0070] Step S200: Separate the upper cover 210 from the isostatic pressing cavity 200 in the vertical direction, so that the isostatic pressing fixture 100 is suspended at the bottom of the upper cover 210, and a feeding gap 110 is formed between two adjacent clamping plates;

[0071] Step S300: Place the battery 300 to be isostatically pressed into the feeding gap 110;

[0072] Step S400: Move the upper cover 210 and the isostatic pressing cavity 200 closer in the vertical direction, so that the upper cover 210 seals the top of the isostatic pressing cavity 200, and at the same time the isostatic pressing fixture 100 is clamped between the bottom of the upper cover 210 and the bottom of the isostatic pressing chamber 220, and the battery 300 to be isostatically pressed is pre-clamped by the clamping of two adjacent clamping plates;

[0073] Step S500: Inject a fluid medium into the isostatic pressing chamber 220 and perform isostatic pressing according to a preset pressure;

[0074] Step S600: Release the pressure after reaching the preset time;

[0075] Step S700: Then separate the upper cover 210 from the isostatic pressing cavity 200 in the vertical direction, separate two adjacent clamping plates, and take out the battery 300.

[0076] In step S200, the opening mechanism drives the upper cover 210 to move upward, so that the isostatic pressing fixture 100 is suspended at the bottom of the upper cover 210 and extends out of the isostatic pressing cavity 200, and two layers of feeding gaps 110 are formed between the bottom clamping plate 130, the middle clamping plate 150 and the top clamping plate 140.

[0077] In step S300, the battery 300 to be isostatically pressed is placed into the clamping groove 111 on the top surfaces of the bottom clamping plate 130 and the middle clamping plate 150 in sequence or at one time by a manipulator feeding device or other structural devices to complete the feeding of the battery 300.

[0078] In step S400, the lid-opening mechanism drives the upper lid 210 to move downward. The isostatic pressing fixture 100 moves downward with the upper lid 210 into the isostatic pressing cavity 200 until the bottom clamping plate 130 contacts the bottom of the isostatic pressing chamber 220 of the isostatic pressing cavity 200. Further, the top clamping plate 140 continues to move downward with the upper lid 210. The middle clamping plate 150 and the top clamping plate 140 continue to move linearly downward under the gravity of the guide post 160 and their own weights. The middle clamping plate 150 contacts and presses the battery 300 at the bottom layer, and the middle clamping plate 150 stops moving downward. Subsequently, the upper lid 210 continues to move downward, and the top clamping plate 140 continues to move downward with the upper lid 210. The top clamping plate 140 contacts and presses the battery 300 at the upper layer, and the top clamping plate 140 stops moving downward. At this time, the entire isostatic pressing fixture 100 clamps all the batteries 300 to be isostatically pressed within the isostatic pressing fixture 100 under the self-weights of the respective structural components. Further, the upper lid 210 continues to move downward until the bottom of the upper lid 210 contacts the surface of the isostatic pressing cavity 200, completing the cavity lid-closing operation of the isostatic press;

[0079] In step S500, a fluid medium is injected into the isostatic pressing chamber 220 through a pressurizing assembly and pressurized. According to the requirements of isostatic pressing of the battery 300, the pressure and time of pressurization are set.

[0080] In step S700, the lid-opening mechanism drives the upper lid 210 to move upward, and the reverse operation can be performed according to the principle and sequence of the downward movement of the upper lid 210 when isostatic pressing starts.

[0081] Finally, when the upper lid 210 moves upward to the upper limit position, the equipment stops running. The robotic loading device or other structural devices take out the batteries 300 after isostatic pressing in sequence or in one go and place them at the designated unloading position, completing an automated isostatic pressing process for the batteries 300.

[0082] The above has specifically described the preferred embodiments of the present invention, but the present invention is not limited to the described embodiments. Those skilled in the art can make various equivalent variations or substitutions without departing from the spirit of the present invention, and these equivalent variations or substitutions are all included within the scope defined by the claims of this application.

Claims

1. An isostatic pressing fixture for all-solid-state soft-pack batteries, characterized in that: include: There are at least two splints, at least two of which are overlapped in the up-down direction, and two adjacent splints are relatively slidably limited in the up-down direction, and the relative fitting surfaces of the two adjacent splints are provided with isostatically pressed hollow parts, and the isostatically pressed hollow parts penetrate the other outer surfaces and fitting surfaces of the splints.

2. The isostatic pressing fixture for all-solid-state soft-pack batteries according to claim 1, characterized in that: At least two of the clamping plates are connected with a sliding limiting structure, and the sliding limiting structure is used to form a material discharge gap between two adjacent clamping plates when the bottom of the isostatic pressing fixture is suspended in the air.

3. The isostatic pressing fixture for all-solid-state soft-pack batteries according to claim 2, characterized in that: There are at least three splints, including a bottom splint at the bottom, a top splint at the top, and at least one middle splint between the bottom splint and the top splint, the top and bottom surfaces of the middle splint are both provided with isostatically pressed hollow portions, and a through groove communicating with the two isostatically pressed hollow portions is provided in the middle of the side surface of the middle splint.

4. The isostatic pressing fixture for all-solid-state soft-pack batteries according to claim 3, characterized in that: The isostatically pressed hollow portion is provided with a plurality of through holes, and the plurality of through holes are vertically connected, the through holes on the top and bottom surfaces of the middle plywood are connected with the through grooves, and a base is provided at the bottom of the bottom plywood.

5. The isostatic pressing fixture for all-solid-state soft-pack batteries according to claim 3, characterized in that: The middle layer sandwich plate comprises two partitions which are fixedly attached to each other up and down, and the surfaces of the two partitions which are attached to each other are provided with flow grooves, and the two flow grooves are matched to form the through groove.

6. The isostatic pressing fixture for all-solid-state soft-pack batteries according to claim 3, characterized in that: The sliding limit structure includes a plurality of guide columns and a plurality of limit connecting rings, wherein the guide columns are fixedly connected to the bottom layer of the splint, and the guide columns are simultaneously connected to the middle layer of the splint and the top layer of the splint for sliding movement up and down, and the upper and lower ends of the limit connecting rings are respectively connected to two adjacent splints on the bottom layer of the splint for sliding movement.

7. The isostatic pressing fixture for all-solid-state soft-pack batteries according to claim 6, characterized in that: The upper end of the guide column is provided with an abutment and limiting piece which abuts against the top surface of the top clamping plate.

8. The isostatic pressing fixture for all-solid-state soft-pack batteries according to claim 6, characterized in that: The limiting connecting ring is provided with a limiting slide groove extending up and down, and the side surfaces of the clamping plates located above the bottom clamping plates are each provided with at least one sliding limiting member, and the sliding limiting members on the two adjacent clamping plates at the upper and lower ends of the limiting slide groove are slidingly connected.

9. The isostatic pressing fixture for all-solid-state soft-pack batteries according to claim 3, characterized in that: The top surface of the top plywood is connected with a quick-connect second connection part.

10. The isostatic pressing fixture for all-solid-state soft-pack batteries according to claim 1, characterized in that: The facing fitting surfaces of two adjacent clamping plates are each provided with a plurality of material clamping grooves, and the isostatically pressed hollow portions are located in the material clamping grooves.

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