Formation pressurization laminate, formation clamp and battery detection equipment

Abstract

The utility model provides a formation pressurization laminate, a formation clamp and battery detection equipment, the formation pressurization laminate comprises a laminate body, the pressurization surface of the laminate body is provided with a pressurization boss and a plurality of guide holes for guide rods to pass through, the surface of the pressurization boss and a to-be-pressed electric core are profiled, the guide holes are provided with guide sleeves, and the guide sleeves are connected with the guide rods. The periphery of the guide rod is attached to the inner periphery of the guide sleeve, at least part of the guide sleeve protrudes out of the pressurizing surface, the protruding end face does not exceed the surface of the side, away from the pressurizing boss, of the to-be-pressed electric core borne on the pressurizing boss, and due to the arrangement of the guide sleeve, the phenomenon that the two sides of the laminate swing in the pressing process can be effectively prevented; the arrangement of the pressurizing boss is beneficial to concentrating thrust on the table top area of the pressurizing boss, namely the position of the battery cell to be pressed, in the pressing process, so that dispersed stress is avoided, the stress controllability of the battery cell is improved, the internal pressure of the battery is uniformly distributed, and the risk of battery swelling is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of battery production, and in particular to a formation pressurized laminate, a formation fixture, and a battery testing device. Background Art

[0002] During the battery formation process, in order to avoid battery bulging, the battery must be effectively pressurized. This is because the internal chemical reaction will generate a large amount of heat during the battery formation process, causing the battery volume to change. If the heat cannot be dispersed in a timely and effective manner, the battery will bulge due to excessive internal pressure. Therefore, it is very important to pressurize the battery.

[0003] However, the existing formation pressurized layers have certain design defects. First, the existing formation pressurized layers are difficult to maintain smooth movement during the pressurization process, which may cause the battery to be subjected to uneven force during the pressurization process, affecting the formation effect of the battery. Secondly, the existing pressurized layers are subjected to dispersed force and cannot concentrate the force on the battery cells. This situation may cause uneven pressure distribution inside the battery, further exacerbating the risk of battery bulging. Utility Model Content

[0004] The main purpose of the embodiments of the present application is to propose a formation pressurized layer, a formation fixture and a battery testing device to solve the technical problems in the production process of traditional solutions, that is, the formation pressurized layer is difficult to maintain smooth movement during the pressurization process, and the force is dispersed, and the battery cell cannot be subjected to concentrated force.

[0005] In the first aspect, to achieve the above-mentioned purpose, the embodiment of the present application proposes a chemical formation pressurized layer plate, including a layer plate body, a pressurized boss and a plurality of guide holes for guide rods to pass through are arranged on the pressurized surface of the layer plate body, the table surface of the pressurized boss is in the shape of the battery cell to be piezoelectric, a guide sleeve is arranged at the guide hole, the outer periphery of the guide rod is fitted with the inner periphery of the guide sleeve, the guide sleeve at least partially protrudes from the pressurized surface, and the protruding end face does not exceed the side surface of the battery cell to be piezoelectric supported on the pressurized boss away from the pressurized boss.

[0006] In some embodiments, the pressurizing surface is also provided with a pressure sensor connected to the pressurizing boss and several first driving members, the pressure sensor is used to obtain the force information of the pressurizing boss bearing the battery cell to be pressed; the first driving member is used to adjust the pressure of the battery cell to be pressed according to the force information.

[0007] In some embodiments, a push rod is provided on the bottom surface of the layer body and is located directly below the first driving member. The first driving member is used to change the supporting force applied by the push rod of the adjacent formed pressurized layer to achieve pressure adjustment of the battery cell to be piezoelectric.

[0008] In some embodiments, the pressure sensor is disposed between the table top of the pressurizing boss and the pressurizing surface, and there are at least two first driving members, which are respectively disposed on both sides of the pressurizing boss.

[0009] In some embodiments, the pressurizing boss is disposed at a middle position of the pressurizing surface, and a plurality of the guide holes are disposed at two end positions of the pressurizing surface.

[0010] In some embodiments, one end of the layer plate body is provided with a connector having at least one hole for passing a chain.

[0011] In some embodiments, a recess matching the first driving member is disposed on the pressurizing surface of the layer plate body, and the first driving member is embedded in the recess.

[0012] In the second aspect, to achieve the above-mentioned purpose, an embodiment of the present application proposes a formation fixture, which includes a second driving member, a push plate, a guide rod and a fixed structure that are connected in sequence, and there are multiple formation pressurized layers as described in any one of the embodiments of the first aspect fixed by the guide rod between the push plate and the fixed structure, and the second driving member is used to push the push plate toward the fixed structure so that the multiple formation pressurized layers apply pressure to the multiple battery cells to be piezoelectric.

[0013] In some embodiments, when the formation pressurized laminate is provided with a pressure sensor and a first driving member,

[0014] The plurality of pressure sensors are used to obtain force information of the plurality of cells to be piezoelectric after the second driving member reaches a preset stroke and stops driving;

[0015] The plurality of first driving members are used to adjust the pressure of the battery core to be pressed according to the corresponding force information.

[0016] In a third aspect, to achieve the above-mentioned purpose, an embodiment of the present application proposes a battery testing device, comprising a formation fixture as described in any one of the embodiments in the above-mentioned second aspect.

[0017] The chemical formation pressurized layer plate proposed in the embodiment of the present application has the following beneficial effects: the present application proposes a chemical formation pressurized layer plate, comprising a layer plate body, a pressurized boss and a plurality of guide holes for guide rods to pass through are arranged on the pressurized surface of the layer plate body, the table surface of the pressurized boss is in the shape of the battery core to be piezoelectric, a guide sleeve is arranged at the guide hole, the outer periphery of the guide rod is fitted with the inner periphery of the guide sleeve, the guide sleeve at least partially protrudes from the pressurized surface, and the protruding end face does not exceed the side surface of the battery core to be piezoelectric supported on the pressurized boss away from the pressurized boss, wherein, thanks to the setting of the guide sleeve, in the present application The contact area between the layer body and the periphery of the guide rod is enlarged, achieving a better limiting effect, thereby effectively preventing the layer from swinging on both sides during the pressurization process, so that the formation pressurization layer can maintain stable movement during the pressurization process, ensuring the formation effect of the battery to reduce the risk of battery bulging. In addition, the setting of the pressurization boss helps to concentrate the thrust on the table area of ​​the pressurization boss during the pressurization process, that is, the position of the battery cell to be pressed, thereby avoiding dispersed force, improving the controllability of the battery cell force, making the internal pressure of the battery evenly distributed, and further reducing the risk of battery bulging. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of the pressurized surface side of the chemically formed pressurized laminate provided in an embodiment of the present application;

[0019] Figure 2 It is a schematic structural diagram of the bottom side of the chemical forming pressurized laminate provided in an embodiment of the present application;

[0020] Figure 3 It is a schematic diagram of the structure of the formation fixture provided in the embodiment of the present application. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0022] It should be noted that, although the functional modules are divided in the device schematic diagram and the logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than the module division in the device or the order in the flowchart. The terms "first", "second", etc. in the specification, claims and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein are only for the purpose of describing the embodiments of this application and are not intended to limit this application.

[0024] During the formation process of the battery, in order to avoid the battery from bulging, the battery must be effectively pressurized. This is because during the formation process of the battery, the internal chemical reaction will generate a large amount of heat, causing the battery volume to change. If the heat cannot be dispersed in time and effectively, the battery will bulge due to excessive internal pressure. Therefore, it is very important to pressurize the battery. However, the existing formation pressurized layer has certain design defects. First, the existing formation pressurized layer is difficult to maintain stable movement during the pressurization process, which may cause the battery to be subjected to uneven force during the pressurization process, affecting the formation effect of the battery. Secondly, the existing pressurized layer is subjected to dispersed force and cannot concentrate the force on the battery cell. This situation may cause uneven pressure distribution inside the battery, further exacerbating the risk of battery bulging.

[0025] In order to solve the technical problems in the production process of the traditional solution that the formation pressurized layer is difficult to maintain stable movement during the pressurization process, and the force is dispersed, and the battery cell cannot be concentratedly stressed, the present embodiment provides a formation pressurized layer, a formation fixture and a battery testing device, the formation pressurized layer includes a layer body, a pressurized boss and a plurality of guide holes for the guide rod to pass through are arranged on the pressurized surface of the layer body, the table surface of the pressurized boss is in the shape of the battery cell to be pressed, a guide sleeve is arranged at the guide hole, the outer periphery of the guide rod and the inner periphery of the guide sleeve are connected The guide sleeve is fitted all around, with at least part of the guide sleeve protruding from the pressurized surface, and the end face of the protrusion does not exceed the surface of the side of the battery cell to be pressed which is carried on the pressurized boss and is away from the pressurized boss. Among them, thanks to the setting of the guide sleeve, the layer plate can be effectively prevented from swinging on both sides during the pressurization process. The setting of the pressurized boss helps to concentrate the thrust on the table area of ​​the pressurized boss, that is, the position of the battery cell to be pressed, during the pressurization process, thereby avoiding dispersed force, improving the controllability of the force on the battery cell, making the internal pressure of the battery evenly distributed, and reducing the risk of battery bulging.

[0026] A detailed description is given below in conjunction with the accompanying drawings.

[0027] Please refer to Figure 1 , Figure 1 It is a structural schematic diagram of the pressurized surface side of the formation pressurized layer 100 provided in an embodiment of the present application; first, in order to achieve the above-mentioned purpose, an embodiment of the present application proposes a formation pressurized layer 100, including a layer body, a layer body having a pressurized boss 101 and a plurality of guide holes 102 for the guide rod to pass through, the table surface of the pressurized boss 101 is in the shape of the battery cell to be piezoelectric, a guide sleeve 103 is provided at the guide hole 102, at least part of the guide sleeve 103 protrudes from the pressurized surface, and the protruding end face does not exceed the side surface of the battery cell to be piezoelectric supported on the pressurized boss 101 away from the pressurized boss.

[0028] Among them, it can be understood that, thanks to the setting of the guide sleeve 103, the contact area between the middle plate body and the periphery of the guide rod in the present application is expanded, achieving a better limiting effect, thereby effectively preventing the plate from swinging on both sides during the pressure process, so that the formation pressurized layer plate 100 can maintain stable movement during the pressurization process, ensuring the formation effect of the battery to reduce the risk of battery bulging. In addition, the setting of the pressurization boss 101 helps to concentrate the thrust on the table area of ​​the pressurization boss 101 during the pressurization process, that is, the position of the battery cell to be pressed, thereby avoiding dispersed force, improving the controllability of the battery cell force, making the internal pressure of the battery evenly distributed, and further reducing the risk of battery bulging.

[0029] In some embodiments, the surface of the pressurizing boss 101 is contoured to the battery cell to be pressurized, which means that during the battery production or processing process, the surface of the boss used for pressurization is designed to match or be similar to the shape of the battery cell surface. This design allows the boss to be in closer and more uniform contact with the battery cell surface when pressure is applied by the formation fixture related to the present application, thereby effectively transmitting pressure and ensuring the uniformity and efficiency of the pressurization process.

[0030] In some embodiments, the pressurizing boss 101 has a preset thickness to ensure that at least part of the guide sleeve 103 protrudes above the pressurizing surface, and the end face of the protrusion does not extend beyond the surface of the side of the battery cell to be pressed carried on the pressurizing boss 101 away from the pressurizing boss, that is, when the formation pressurization is performed, there is a gap between the protruding end face of the guide sleeve 103 and the bottom surface of the adjacent layer plate, thereby preventing the problem that after the long sleeve is set on the layer plate body, the battery cell carried on the layer plate body cannot contact the pressurizing surface of the adjacent layer plate because the thickness is less than the length of the sleeve, so as to ensure that the battery cell to be pressed can fully contact the surface of the pressurizing boss 101.

[0031] In some embodiments, a portion of the guide sleeve is embedded in the guide hole of the layer body, wherein the inner diameter of the guide sleeve is equal to the diameter of the guide rod, and the outer diameter of the guide sleeve is equal to the diameter of the guide hole. In this case, because the inner diameter of the guide sleeve is equal to the diameter of the guide rod, this ensures that the guide rod can be guided very accurately when passing through the guide sleeve, reducing the swing or deviation during the pressurization process and improving the accuracy of the pressurization. The outer diameter of the guide sleeve matches the diameter of the guide hole, so that the sleeve can be firmly fixed in the layer body, which can further improve the stability of the entire pressurization system and is suitable for application scenarios with high requirements for pressurization accuracy.

[0032] In some embodiments, the guide sleeve is not embedded in the guide hole, but is entirely located on the outside of the pressure boss. At this time, the inner diameter of the guide sleeve is equal to the diameter of the guide hole and also equal to the diameter of the guide rod. Among them, setting the guide sleeve on the outside of the pressure boss can simplify the structure of the layer plate, making the manufacture and assembly of the layer plate easier, providing more space to accommodate battery cells of different sizes and shapes, and also facilitating the adjustment of the position of the guide rod and the guide sleeve, which is more flexible and convenient.

[0033] In some embodiments, the pressure surface is further provided with a pressure sensor 104 connected to the pressure boss 101 and a plurality of first driving members, wherein among various types of driving members, the first driving element can be selected in a wide variety of ways, such as a cylinder, a linear motor, or other transmission devices capable of realizing linear drive composed of a motor and a screw. Figure 1 As shown, the first driving member is a cylinder 105, and the pressure sensor 104 is used to obtain the force information of the pressurizing boss 101 carrying the core to be piezoelectric; the cylinder 105 is used to adjust the pressure of the core to be piezoelectric according to the force information.

[0034] In some embodiments, it is conceivable that existing battery clamps are generally not equipped with a battery pressure monitoring function, and thus are unable to accurately grasp the pressure conditions to which the battery is subjected. In particular, in pressurized clamps involving multi-layer board structures, such defects are particularly prominent, resulting in the difficulty in maintaining uniform pressure on battery cells on different layers in traditional solutions. Therefore, the present application provides a pressure sensor 104 and a plurality of cylinders 105 connected to a pressurized boss 101, and uses the pressure sensor 104 to obtain force information of the pressurized boss 101 carrying the battery cell to be pressed, so that the cylinder 105 can, under the control of a microcontroller, adjust the pressure of the battery cell to be pressed according to the force information, so that the force on the battery cell to be pressed meets the required preset pressure threshold.

[0035] Please refer to Figure 2 and Figure 3 , Figure 2 1 is a schematic diagram of the structure of the bottom side of the chemical forming pressurized laminate 100 provided in an embodiment of the present application. Figure 31 is a schematic diagram of the structure of the formation fixture 300 provided in an embodiment of the present application; in some embodiments, a push rod 201 is provided on the bottom surface of the layer body and is located directly below the cylinder 105. The cylinder 105 is used to change the supporting force applied by the push rod 201 of the adjacent formation pressurized layer 100 to achieve pressure adjustment of the piezoelectric core. It can be imagined that during the pressurization process of the formation fixture 300, the distance between two adjacent formation pressurized layers 100 is formed by the mutual support of the cylinders 105 and the push rods 201 therebetween. For example, the push rod 201 on the bottom surface of the second formation pressurized layer contacts the cylinder 105 on the pressurized surface of the first formation pressurized layer, and there is a pressure gap between the pressurized boss 101 of the first formation pressurized layer and the bottom surface of the second formation pressurized layer. The pressure sensor 104 of the first forming pressurized layer can obtain the force information of the cell to be pressed, and then when the microcontroller determines that the force information is greater than the preset pressure threshold, the microcontroller can control the cylinder 105 of the first forming pressurized layer to pressurize, increase the support force provided by the push rod 201 on the bottom surface of the second forming pressurized layer, so as to reduce the pressure on the cell to be pressed. Correspondingly, when the microcontroller determines that the force information is less than the preset pressure threshold, the microcontroller can control the cylinder 105 of the first forming pressurized layer to decompress, reduce the support force provided by the push rod 201 on the bottom surface of the second forming pressurized layer, so as to increase the pressure on the cell to be pressed, and then the pressure adjustment of the cell to be pressed can be achieved between multiple forming pressurized layers 100.

[0036] It is worth noting that, in some embodiments, the relevant steps of adjusting the pressure of the piezoelectric core according to the force information by the cylinder 105 in the present application are all carried out under the control of a microcontroller outside or inside the battery detection equipment. The microcontroller and the specific pressure values ​​adjusted by the cylinder 105 can be set by technicians in this field according to actual conditions, and the specific setting details are not related to the structural features embodied in the present application.

[0037] Please refer to Figure 1 In some embodiments, the pressure sensor 104 is disposed between the table top of the pressurizing boss 101 and the pressurizing surface, and is used to monitor the pressure distribution during the pressurizing process in real time to ensure that the pressure is evenly applied to the object to be pressed, which helps to improve the consistency and accuracy of the pressurizing effect; there are at least two cylinders 105, and the two cylinders 105 are respectively disposed on both sides of the pressurizing boss 101. This double-sided drive design helps to ensure uniform distribution of the pressurizing force, improve the stability of the pressurizing system, and avoid pressure deviation caused by unilateral drive, thereby determining the pressurization effect.

[0038] Please refer to Figure 1In some embodiments, the pressurizing boss 101 is disposed in the middle of the pressurizing surface, and a plurality of guide holes 102 are disposed at both ends of the pressurizing surface. Specifically, the number of the guide holes 102 may be four, with two holes disposed at each end of the pressurizing surface.

[0039] Please refer to Figure 1 and Figure 3 In some embodiments, a connector 106 having at least one hole for passing a chain is provided at one end of the layer body. Since in a forming fixture 300 having multiple forming pressurized layers 100, a chain can be passed between the connectors 106 of the multiple forming pressurized layers 100 to further fix the positions of the multiple forming pressurized layers 100 in the forming fixture 300, the layer can be further prevented from swinging on both sides during the pressurization process.

[0040] In some embodiments, a recess matching the first driving member is provided on the pressurized surface of the layer body, and the first driving member is embedded in the recess. It can be understood that by embedding the first driving member in the recess of the layer, the overall thickness of the pressurized layer can be effectively reduced, which is beneficial to improving the battery assembly density and saving space. The recess should be designed to match the shape and size of the first driving member to ensure that the first driving member can be accurately embedded while reducing space waste. The depth of the recess should be determined according to the size of the first driving member and the required embedding depth to ensure that the top of the first driving member does not protrude from the surface of the layer, thereby maintaining the overall flatness of the pressurized layer.

[0041] Please refer to Figure 3 In the second aspect, in order to achieve the above-mentioned purpose, the embodiment of the present application proposes a chemical formation fixture 300, which includes a second driving member, a push plate 302, a guide rod 303 and a fixing structure 304 which are sequentially connected, wherein the second driving member can be as follows Figure 3 The motor screw mechanism 301 shown in FIG.

[0042] There are multiple chemical formation pressurization layers 100 as any one of the embodiments of the first aspect mentioned above fixed by guide rods 303 between the push plate 302 and the fixed structure 304, and the motor screw mechanism 301 is used to push the push plate 302 toward the fixed structure 304 so that the multiple chemical formation pressurization layers 100 apply pressure to the multiple battery cells to be pressed.

[0043] In some embodiments, the guide rod 303 passes through the interior of the fixed structure 304, the motor screw mechanism 301 is arranged on the outer side of the front end of the fixed structure 304, and the push plate 302 is arranged on the inner side of the front end of the fixed structure 304. When the formation pressurization is performed, under the action of the motor screw mechanism 301, the push plate 302 pushes the multiple formation pressurization layers 100 on the guide rod 303 to move toward the end of the fixed structure 304. During this period, the pressurization bosses 101 arranged on the pressurization surfaces of the multiple layer bodies can be used to concentrate the force on the multiple battery cells. Specifically, the pressurization surfaces of the multiple layer bodies face the motor screw mechanism 301.

[0044] In some embodiments, elastic members 305 are provided between adjacent multiple formation pressurized layers 100 to prevent the spacing between the multiple formation pressurized layers 100 from being too large or too small, and to fix the adjacent formation pressurized layers 100, which can further prevent the layers from swinging on both sides during the pressurization process, so that they can maintain stable movement during the pressurization process.

[0045] In some embodiments, when the formation pressurized layer is provided with pressure sensors and cylinders, after the motor screw mechanism reaches a preset stroke and stops driving, multiple pressure sensors are used to obtain force information of multiple cells to be piezoelectric, and multiple cylinders are used to adjust the pressure of the cells to be piezoelectric according to the corresponding force information to ensure the pressure uniformity of the cells on different layers.

[0046] In some embodiments, the formation pressurized layer includes an adjacent first pressurized layer and a second pressurized layer. After the pressure of the first battery cell is adjusted by the pressure sensor and cylinder corresponding to the first pressurized layer, and the pressure of the second battery cell is adjusted by the pressure sensor and cylinder corresponding to the second pressurized layer, the pressure sensor corresponding to the first pressurized layer is used to obtain pressure change information of the first battery cell, and the corresponding cylinder is used to perform pressure compensation on the second battery cell according to the pressure change information.

[0047] Specifically, in some embodiments, the pressure sensor is a sensor installed on the formation pressurized layer, which is used to monitor the stress condition of the battery cell in real time; the first driving member is used to fine-tune the pressure on the battery cell by adjusting the extension and contraction of the first driving member according to the feedback of the pressure sensor, so as to achieve precise pressure compensation; the second driving member is used to push the push plate to move, so as to apply initial pressure to the battery cell. After reaching the preset stroke, the motor stops driving and instead adjusts the pressure through the first driving member; the formation pressurized layer and the formation fixture are used to accommodate and pressurize the battery cell, and cooperate with the pressure sensor and the first driving member to achieve fine pressure control; based on the above structure, the present application can realize the following specific application process: initial pressure application: through The push plate is pushed toward the battery cell by the second driving member to apply initial pressure until the preset stroke is reached; real-time pressure monitoring and adjustment: a pressure sensor is used to obtain the pressure on the first battery cell away from the motor side (i.e., the end of the clamp), and the pressure on the first battery cell is adjusted by adjusting the first driving member at the corresponding position. At the same time, the force on the second battery cell adjacent to the first battery cell is monitored, and the first driving member at the position of the second battery cell is adjusted to make the force on the second battery cell approach the preset value, and pay attention to whether the force on the first battery cell is affected. If necessary, pressure compensation can be performed, and so on. Continue to monitor and adjust the force conditions of more battery cells to ensure that the force on each battery cell meets the requirements.

[0048] Furthermore, it is conceivable that, based on the structural scheme proposed in the present application, continuous pressure compensation can be achieved, that is, through real-time monitoring and pressure regulation of each battery cell, the consistency and uniformity of the force applied to the multiple layers of battery cells during the entire pressurization process can be ensured, which can not only improve the uniformity of the battery formation process, but also significantly improve the overall quality and performance of the battery, ensuring that the formation process of each battery cell can be completed smoothly.

[0049] In the third aspect, in order to achieve the above-mentioned purpose, the embodiment of the present application proposes a battery testing device, including a formation fixture as in any one of the embodiments in the second aspect above. It is worth noting that since the battery testing device of the embodiment of the present application has the formation fixture of the above-mentioned embodiment, and the formation fixture of the above-mentioned embodiment includes the formation pressurized layer of the above-mentioned embodiment, therefore, the specific implementation manner and technical effects of the manufacturing device of the embodiment of the present application can refer to the specific implementation manner and technical effects of the formation fixture and the formation pressurized layer of any of the above-mentioned embodiments.

[0050] In the several embodiments provided in the present application, it should be understood that the disclosed device can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of units is only a logical function division, and there may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0051] The preferred embodiments of the present invention are described above with reference to the accompanying drawings, but the scope of the rights of the present invention is not limited thereto. Any modification, equivalent substitution and improvement made by a person skilled in the art without departing from the scope and essence of the present invention should be within the scope of the rights of the present invention.

Claims

1. A chemically formed pressurized laminate, characterized in that: It includes a layer plate body, and a pressurizing boss and a plurality of guide holes for guide rods to pass through are arranged on the pressurizing surface of the layer plate body, the table surface of the pressurizing boss is in the shape of the electric core to be piezoelectric, and a guide sleeve is arranged at the guide hole, the outer periphery of the guide rod is fitted with the inner periphery of the guide sleeve, and the guide sleeve at least partially protrudes from the pressurizing surface, and the protruding end face does not exceed the side surface of the electric core to be piezoelectric supported on the pressurizing boss away from the pressurizing boss.

2. The chemically formed pressurized laminate according to claim 1, characterized in that: The pressurizing surface is also provided with a pressure sensor connected to the pressurizing boss and a plurality of first driving members, wherein the pressure sensor is used to obtain the force information of the pressurizing boss bearing the battery cell to be pressed; and the first driving member is used to adjust the pressure of the battery cell to be pressed according to the force information.

3. The chemically formed pressurized laminate according to claim 2, characterized in that: A push rod is arranged on the bottom surface of the layer body and is located directly below the first driving member. The first driving member is used to change the supporting force applied by the push rod of the adjacent formation pressurized layer to achieve pressure adjustment of the battery core to be pressed.

4. The chemically formed pressurized laminate according to claim 2, characterized in that: The pressure sensor is arranged between the table top of the pressurizing boss and the pressurizing surface. There are at least two first driving members, and the two first driving members are respectively arranged on both sides of the pressurizing boss.

5. The chemically formed pressurized laminate according to claim 2, characterized in that: A recess matching the first driving member is arranged on the pressurizing surface of the layer plate body, and the first driving member is embedded in the recess.

6. The chemically formed pressurized laminate according to claim 1, characterized in that: The pressurizing boss is arranged at the middle position of the pressurizing surface, and a plurality of guide holes are arranged at the two end positions of the pressurizing surface.

7. The chemically formed pressurized laminate according to claim 1, characterized in that: One end of the layer plate body is provided with a connecting piece with at least one hole for passing a chain.

8. A formation fixture, characterized in that: The formation fixture includes a second driving member, a push plate, a guide rod and a fixed structure which are connected in sequence. There are multiple formation pressurized layers as described in any one of claims 1 to 7 fixed by the guide rod between the push plate and the fixed structure. The second driving member is used to push the push plate toward the fixed structure so that the multiple formation pressurized layers apply pressure to the multiple battery cells to be piezoelectric.

9. The formation fixture according to claim 8, characterized in that: In the case where the formation pressurized laminate is provided with a pressure sensor and a first driving member, The plurality of pressure sensors are used to obtain force information of the plurality of cells to be piezoelectric after the second driving member reaches a preset stroke and stops driving; The plurality of first driving members are used to adjust the pressure of the battery core to be pressed according to the corresponding force information.

10. A battery testing device, characterized in that: Comprising the formation fixture as described in any one of claims 8 to 9.

Images