Chemical Needle Bed Equipment

Abstract

This utility model belongs to the field of battery manufacturing technology and discloses a formation needle bed device. The formation needle bed device includes pressure plate assemblies, electrical connection assemblies, and pre-fixing members. At least two pressure plate assemblies are movably arranged along a first horizontal direction, and a clamping space is defined between adjacent pressure plate assemblies. The electrical connection assemblies are movably mounted on the pressure plate assemblies and are adjustable in position along a second horizontal direction. The pre-fixing members are connected to two adjacent pressure plate assemblies, and a limiting portion is configured between the two ends of the pre-fixing members. The distance between the two pre-fixing members is adjustable along the second horizontal direction. This formation needle bed device improves the convenience and safety of the formation operation. Furthermore, by moving the electrical connection assemblies and pre-fixing members, batteries of different lengths can be pre-fixed and electrically connected. This gives the formation needle bed device good versatility and compatibility for batteries of different lengths, reducing equipment costs and battery production costs.

Description

Technical Field

[0001] This utility model relates to the field of battery manufacturing technology, and in particular to a formation needle bed device. Background Technology

[0002] During battery manufacturing, charging and discharging are used to activate the active materials within the battery and to produce a solid electrolyte interphase (SEI) film on the electrode surface. This process is called battery formation. Gases are generated during battery formation, and these gases can affect the quality of the formed film, which in turn affects the battery's performance and safety.

[0003] During the formation process, a formation bed device is used to load the battery, clamp and pressurize it, and connect the positive and negative terminals of the battery through probes to charge and discharge it. However, existing formation bed devices have poor compatibility with batteries of different lengths and sizes, resulting in high equipment costs and battery production costs.

[0004] Therefore, there is an urgent need for a chemical needle bed device to solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this invention is to provide a formation needle bed device that is compatible with batteries of different lengths and sizes, thereby reducing equipment costs and battery production costs.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] Chemical needle bed equipment, including:

[0008] A pressure plate assembly, wherein at least two pressure plate assemblies are arranged along a horizontal first direction and the pressure plate assemblies are movably arranged along the horizontal first direction, and a clamping space is defined between two adjacent pressure plate assemblies;

[0009] An electrical connection assembly is movably mounted on the pressure plate assembly and is adjustable in position along a second horizontal direction, which is perpendicular to the first horizontal direction.

[0010] The pre-fixing member is provided in each clamping space with at least two pre-fixing members. One end of the pre-fixing member is connected to one of the two adjacent pressure plate assemblies, and the other end of the pre-fixing member is connected to the other of the two adjacent pressure plate assemblies. A limiting portion is configured between the two ends of the pre-fixing member, and the two pre-fixing members are adjustablely spaced along the second horizontal direction.

[0011] The beneficial effects of the formation needle bed equipment of this utility model are as follows: The formation needle bed equipment can improve the convenience and safety of the formation operation through the pre-fixing component, and can also make batteries of different lengths well pre-fixed and electrically connected by moving the electrical connection component and the pre-fixing component along the second horizontal direction. This makes the formation needle bed equipment have good versatility and compatibility for batteries of different lengths, thereby reducing equipment costs and battery production costs. Attached Figure Description

[0012] Figure 1 This is a partial three-dimensional view of the chemical forming needle bed device provided by this utility model;

[0013] Figure 2 This is a three-dimensional schematic diagram of two adjacent pressure plate assemblies in this utility model;

[0014] Figure 3 This is a side view of two adjacent pressure plate assemblies in this utility model;

[0015] Figure 4 yes Figure 2 A magnified view of a section at point A in the middle;

[0016] Figure 5 yes Figure 2 A magnified view of a section at point B in the middle;

[0017] Figure 6 This is a frontal schematic diagram of the pre-fixed component supporting the battery in this utility model;

[0018] Figure 7 This is a side view of the pre-fixed component supporting the battery in this utility model;

[0019] Figure 8 This is a partial top view of the chemical needle bed device provided by this utility model;

[0020] Figure 9 yes Figure 8 A magnified view of a section at point C;

[0021] Figure 10 yes Figure 1 A magnified view of a section at point D.

[0022] In the picture:

[0023] 100. Clamping space; 200. Battery; 201. Electrode;

[0024] 1. Pressure plate assembly; 11. Pressure plate; 111. First slide rail; 12. Buffer pad;

[0025] 2. Electrical connection assembly; 21. Mounting base; 22. Probe plate; 23. Press-fit plate;

[0026] 3. Pre-fixed component; 31. Positioning hole; 32. Limiting part; 33. Crease;

[0027] 4. Frame assembly; 41. Centering rod; 42. Horizontal mounting rod; 421. Rod mounting hole;

[0028] 5. Driver components. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0030] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," "fixed," and "abutting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0032] In the description of this embodiment, the terms "upper," "lower," "right," and "left," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0033] The following is based on the appendix Figure 1 To be continued Figure 10 This invention introduces the chemical needle bed device provided by this utility model.

[0034] like Figure 1 , Figure 2 As shown, in this embodiment, the formation needle bed device mainly includes a frame assembly 4, a drive assembly 5, a pressure plate assembly 1, an electrical connection assembly 2, and a pre-fixing component 3. The frame assembly 4 is fixedly installed and used to install and support components such as the drive assembly 5, the pressure plate assembly 1, the electrical connection assembly 2, and the pre-fixing component 3. At least two pressure plate assemblies 1 are arranged along a horizontal first direction (as shown by the X-axis in the figure), and a clamping space 100 is defined between adjacent pressure plate assemblies 1. During the formation process, the battery 200 can be placed within the clamping space 100 to undergo pressure, heating, and charging / discharging processes.

[0035] The drive assembly 5 is connected to the pressure plate assembly 1 and can drive the pressure plate assembly 1 to move in the first horizontal direction, thereby changing the size of the clamping space 100 in the first horizontal direction. When this size is reduced and the pressure plate assembly 1 abuts against the surface of the battery 200, pressure can be continuously applied to the battery 200.

[0036] The electrical connection assembly 2 is movably mounted on the pressure plate assembly 1, and its position is adjustable along a second horizontal direction (as shown by the Y-axis in the figure). This second horizontal direction is perpendicular to the first horizontal direction. It should be noted that in this invention, the dimension of the battery 200 along the first horizontal direction is the thickness of the battery 200, and the dimension of the battery 200 along the second horizontal direction is the length of the battery 200. The electrode 201 of the battery 200 is disposed at at least one end of the battery 200 along the second horizontal direction. The electrical connection assembly 2 includes a probe, which can be adjusted in position within the clamping space 100 along the second horizontal direction according to the different lengths of the battery 200. This ensures that during the formation process of batteries 200 with different lengths, the center of the battery 200 and the center of the pressure plate assembly 1 are located on the same axis along the first horizontal direction, resulting in uniform pressure on the battery 200. Furthermore, by adjusting the position of the electrical connection assembly 2, electrical connection between the electrode 201 and the probe can be achieved for batteries 200 with different lengths, thereby achieving uniform pressure and stable charging and discharging.

[0037] Meanwhile, to improve battery production efficiency and reduce safety risks, a pre-fixing component 3 is also provided in each clamping space 100. The pre-fixing component 3 is made of sheet-like parts such as support paper or support sheet. When the pre-fixing component 3 is bent into a V-shape and fixed in the clamping space 100, the pre-fixing component 3 can pre-fix the battery 200 in a preset position in the clamping space 100 before pressure is applied, which makes it convenient for operators to perform the clamping and pressure application process while away from moving parts.

[0038] For example, such as Figure 2 , Figure 3 As shown, in this embodiment, each clamping space 100 is provided with two pre-fixing members 3. One end of each pre-fixing member 3 along the first horizontal direction is connected to one of the two adjacent pressure plate assemblies 1, and the other end of each pre-fixing member 3 along the first horizontal direction is connected to the other of the two adjacent pressure plate assemblies 1. The portion between the two ends of each pre-fixing member 3 is configured as a limiting part 32. The limiting part 32 can support the battery 200 from bottom to top and limit the battery 200 along the first horizontal direction. At the same time, it prevents the battery 200 from moving along the second horizontal direction through the effect of friction, thereby fixing the battery 200 in the clamping space 100. In this way, the operator or robot can place and fix the battery 200 in the clamping space 100 when the pressure plate assembly 1 is not moved, and then, after moving away from the pressure plate assembly 1 to a safe position, move the pressure plate assembly 1 by the drive assembly 5 to apply pressure to the battery 200.

[0039] And, as Figure 2 , 3 As shown, in this embodiment, the two pre-fixing members 3 are adjustablely spaced along the second horizontal direction. This ensures that when forming batteries 200 of different lengths, one of the two pre-fixing members 3 can always support one end of the battery 200 along the second horizontal direction, and the other pre-fixing member 3 can always support the other end of the battery 200 along the second horizontal direction. This allows the battery 200 to be fixed relatively horizontally and prevents the battery 200 from tilting before pressure is applied, which would cause the center of the pressure plate assembly 1 to deviate from the center of the battery 200, resulting in uneven pressure application. For example, when the battery 200 has a large length, the distance between the two pre-fixing members 3 along the second horizontal direction is increased to improve the stability of the pre-fixation of the battery 200 and ensure that the electrode 201 of the battery 200 protrudes from the pre-fixing member 3. Conversely, when the battery 200 has a small length, the distance between the two pre-fixing members 3 along the second horizontal direction is reduced to prevent the electrode 201 of the battery 200 from being blocked by the pre-fixing member 3, thus avoiding difficulties in electrical connection.

[0040] The formation needle bed equipment described above can improve the convenience and safety of the formation operation through the pre-fixing component 3. It can also ensure that batteries 200 of different lengths can be well pre-fixed and electrically connected by moving the electrical connection component 2 and the pre-fixing component 3 along the second horizontal direction. This makes the formation needle bed equipment have good versatility and compatibility with batteries 200 of different lengths, thereby reducing equipment costs and battery 200 production costs.

[0041] Optionally, in some embodiments, a greater number of pre-fixing members 3 may be arranged along the second horizontal direction within each clamping space 100, thereby providing better support and positioning for the battery 200. Therefore, the present invention does not specifically limit the number of pre-fixing members 3, as long as they can effectively support and position the battery 200.

[0042] In this embodiment, the electrical connection assembly 2 is adjustablely connected to the pressure plate assembly 1 along the second horizontal direction, and the pre-fixing member 3 is fixedly connected to the electrical connection assembly 2. The electrical connection assembly 2 and the pre-fixing member 3 can move synchronously, so that during changeover production, only the position of the electrical connection assembly 2 along the second horizontal direction needs to be adjusted according to the specific length of the battery 200, and the pre-fixing member 3 can be moved synchronously to the appropriate position, thereby simplifying the adjustment process and speeding up production efficiency.

[0043] Specifically, such as Figure 4 , Figure 5 As shown, the pressure plate assembly 1 includes a pressure plate 11, which extends vertically (as shown by the Z-axis in the figure). A first slide rail 111 is provided below the pressure plate 11, and the first slide rail 111 extends horizontally in a second direction. The electrical connection assembly 2 includes a probe plate 22 and two fixing seats 21. A probe is mounted on the probe plate 22, and the length direction of the probe plate 22 is parallel to the vertical direction. The two fixing seats 21 are respectively connected to the upper and lower ends of the probe plate 22. The fixing seat 21 located at the lower end of the probe plate 22 is slidably connected to the first slide rail 111, thereby connecting the electrical connection assembly 2 to the pressure plate 11 and allowing the probe plate 22 to move in the second horizontal direction. The fixing seat 21 located at the upper end of the probe plate 22 is detachably connected to a pressure plate 23. The end of the pre-fixing member 3 can be clamped and fixed between the fixing seat 21 and the pressure plate 23, thereby fixing the pre-fixing member 3 and the electrical connection assembly 2.

[0044] Of course, in some embodiments, the electrical connection component 2 can be adjusted to be connected to the pressure plate assembly 1 along the second horizontal direction, and the pre-fixing component 3 can be adjusted to be connected to the pressure plate assembly 1 along the second horizontal direction, or the pre-fixing component 3 can be adjusted to be connected to the electrical connection component 2 along the second horizontal direction. This arrangement allows the electrical connection component 2 and the pre-fixing component 3 to be adjusted in position along the second horizontal direction, which can meet the pre-fixation and electrical connection requirements of batteries 200 with different electrode 201 lengths, thereby further enhancing the compatibility and versatility of the formation needle bed device.

[0045] It should be noted that the aforementioned position adjustment along the second horizontal direction can be continuous or discontinuous. It can be entirely continuous, partially discontinuous, or a combination of both. For example, in some embodiments, the pressure plate 11 has multiple bolt mounting holes arranged along the second horizontal direction. Mounting bolts pass through the fixing seat 21 and are selectively inserted into the corresponding bolt mounting holes, allowing the electrical connection assembly 2 and the pressure plate to be movably connected in a discontinuous manner. Furthermore, a second slide rail can be provided on the fixing seat 21, with mounting blocks slidably mounted on it along the second horizontal direction. These mounting blocks can clamp and fix the end of the pre-fixed member 3 with the aforementioned pressure plate 23, thereby continuously connecting the pre-fixed member 3 and the electrical connection assembly 2. Continuous adjustment using structures such as slide rails offers greater compatibility and versatility, while discontinuous adjustment using structures such as bolt mounting holes provides greater structural stability. This allows the chemical needle bed equipment to adaptably select different adjustment methods according to specific needs.

[0046] Optionally, in this embodiment, the fixing base 21 and the pressure plate 23 are detachably connected by a threaded connector. Preferably, as shown in the figure... Figure 6 As shown, the end of the pre-fixed component 3 is also provided with at least two positioning holes 31. When the pre-fixed component 3 is clamped and fixed, the threaded connector passes through the positioning holes 31 to position the pre-fixed component 3 itself, thereby avoiding the phenomenon of the pre-fixed component 3 itself being skewed, and thus ensuring the stability and positional accuracy of the battery 200 during pre-fixation.

[0047] Furthermore, the positioning hole 31 is also provided at the limiting part 32 of the pre-fixing member 3, that is, at the position between the two ends of the pre-fixing member 3, so that the depth of the pre-fixing member 3 extending into the clamping space 100 in the vertical direction is variable, so as to meet the pre-fixing requirements of batteries 200 of different heights. For example, when the height of the battery 200 itself is large, the pre-fixing member 3 can be fixed by the positioning hole 31 at the end, so as to prevent a part of the battery 200 from protruding into the clamping space 100 in the vertical direction and being unable to be compressed. When the height of the battery 200 itself is small, the pre-fixing member 3 can be fixed by the positioning hole 31 at the limiting part 32, so that the electrode 201 of the battery 200 is at a suitable height in the clamping space 100, which meets the connection requirements of the probe. Preferably, the limiting part 32 is also provided with a crease 33 so that the middle part of the limiting part 32 can be bent to form a flat surface, thereby supporting the battery 200 well.

[0048] Optionally, such as Figure 6As shown, in this embodiment, along the second horizontal direction, the total width of the limiting portion 32 within the same clamping space 100 is greater than one-third of the length of the battery 200, thereby enabling the battery 200 to be more stably supported and limited. For example, in this embodiment, if two pre-fixing members 3 are provided within the same clamping space 100, then the total width of the limiting portion 32 is the sum of the widths of the limiting portions 32 of the two pre-fixing members 3. In some embodiments, if three pre-fixing members 3 are provided within the same clamping space 100, then the total width of the limiting portion 32 is the sum of the widths of the limiting portions 32 of the three pre-fixing members 3.

[0049] Furthermore, the pre-fixing member 3 is a sheet-like component with a thickness of less than 2 mm, thereby ensuring that the pressure on the surface of the battery 200 is relatively uniform. For example, the pressure-bearing surface of the battery 200 includes two regions: one directly subjected to pressure from the pressure plate assembly 1, and the other bearing pressure from the pressure plate assembly 1 through the pre-fixing member 3. Since the pressure conditions in different regions differ, it is preferable to limit the thickness of the sheet-like component to ensure uniform surface pressure.

[0050] like Figure 7 As shown, in this embodiment, a buffer pad 12 is provided on the side of the pressure plate assembly 1 facing the battery 200 along the first horizontal direction. This buffer pad 12 can be deformed to allow the two areas to bear the same pressure. Preferably, there is an anti-interference gap k of at least 0.2 mm between the probe plate 22 of the electrical connection assembly 2 and the buffer pad 12 along the first horizontal direction, thereby preventing friction between the probe plate 22 and the buffer pad 12 during movement. Long-term friction can easily lead to a decrease in the surface flatness of the buffer pad 12, and even the appearance of burrs. When the battery 200 is under pressure, burrs or uneven areas can cause uneven local pressure on the battery 200, thereby affecting the production quality of the battery 200.

[0051] like Figure 8 As shown, in this embodiment, the frame assembly 4 further includes two centering rods 41, both of which are arranged parallel to the first horizontal direction. Vertically, the two centering rods 41 are positioned above the pressure plate assembly 1. Horizontally, one centering rod 41 is located on one side of the center of the pressure plate assembly 1, and the other centering rod 41 is located on the other side of the center of the pressure plate assembly 1. When the battery 200 is placed into the clamping space 100 from top to bottom, the two centering rods 41 can limit and detect the battery 200, thereby ensuring the uniformity of pressure applied to the battery 200.

[0052] Specifically, when the center of the battery 200 and the center of the pressure plate assembly 1 are located in the same vertical plane, the battery 200 should be able to pass precisely between the two centering rods 41. However, when the center of the battery 200 and the center of the pressure plate assembly 1 are not located in the same vertical plane, the end of the battery 200 will be blocked by one of the centering rods 41, thus alerting the operator that the battery 200's position has deviated along the second horizontal direction. Optionally, to achieve good limiting and detection results, the offset between the center of the line connecting the two centering rods 41 and the center of the pressure plate assembly 1 along the second horizontal direction should not exceed 50mm.

[0053] Optionally, in this embodiment, as Figure 9 , Figure 10 To accommodate batteries 200 of different lengths, the centering rod 41 is adjustable in position along the second horizontal direction. Specifically, the frame assembly 4 includes two horizontal mounting rods 42, one located at one end of the frame assembly 4 along the first horizontal direction, and the other at the other end. The length of the horizontal mounting rods 42 is along the second horizontal direction, and each horizontal mounting rod 42 has multiple rod mounting holes 421 arranged along the second horizontal direction. The end of the centering rod 41 is provided with a locating pin or other connecting component, and the locating pin can be selectively inserted into the corresponding rod mounting hole 421, thereby connecting the centering rod 41 and the horizontal mounting rod 42.

[0054] When it is necessary to limit the length of a battery 200, simply change the rod mounting hole 421 connected to the positioning pin to increase the distance between the two centering rods 41, thus satisfying the passage requirement of the longer battery 200. Similarly, when it is necessary to limit and detect the length of a battery 200, change the rod mounting hole 421 connected to the positioning pin to decrease the distance between the two centering rods 41, thereby satisfying the passage requirement of the shorter battery 200 while also detecting whether the battery 200's position is deviated.

[0055] In the description of this specification, references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0056] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A chemical needle bed apparatus, characterized in that, include: A pressure plate assembly (1), at least two of the pressure plate assemblies (1) are arranged along a first horizontal direction, and the pressure plate assemblies (1) are movably arranged along the first horizontal direction, and a clamping space (100) is defined between two adjacent pressure plate assemblies (1); Electrical connection assembly (2), which is movably mounted on the pressure plate assembly (1) and is adjustable in position along a second horizontal direction, which is perpendicular to the first horizontal direction; Pre-fixing member (3), at least two pre-fixing members (3) are provided in each clamping space (100), one end of the pre-fixing member (3) is connected to one of the two adjacent pressure plate assemblies (1), the other end of the pre-fixing member (3) is connected to the other of the two adjacent pressure plate assemblies (1), a limiting part (32) is configured between the two ends of the pre-fixing member (3), and the two pre-fixing members (3) are adjustablely spaced along the second horizontal direction.

2. The chemical needle bed apparatus according to claim 1, characterized in that, The electrical connection assembly (2) is adjustablely connected to the pressure plate assembly (1) along the second horizontal direction, and the pre-fixed member (3) is fixedly connected to the electrical connection assembly (2); or, The electrical connection assembly (2) is adjustablely connected to the pressure plate assembly (1) along the second horizontal direction, and the pre-fixing member (3) is adjustablely connected to the pressure plate assembly (1) along the second horizontal direction; or, The electrical connection assembly (2) is adjustablely connected to the pressure plate assembly (1) along the second horizontal direction, and the pre-fixing member (3) is adjustablely connected to the electrical connection assembly (2) along the second horizontal direction.

3. The chemical needle bed apparatus according to claim 2, characterized in that, The pressure plate assembly (1) includes a first slide rail (111) extending along the second horizontal direction, and the electrical connection assembly (2) and the pre-fixing member (3) are connected to the first slide rail (111); or, The pressure plate assembly (1) includes a pressure plate (11) and mounting bolts. The pressure plate (11) has a plurality of bolt mounting holes, which are arranged along the second horizontal direction. The mounting bolts pass through the electrical connection assembly (2) and are inserted into the corresponding bolt mounting holes.

4. The chemical needle bed apparatus according to claim 2, characterized in that, The electrical connection assembly (2) includes a fixing seat (21) and a pressure plate (23), which are detachably connected. The end of the pre-fixing member (3) is clamped and fixed between the fixing seat (21) and the pressure plate (23).

5. The chemical needle bed apparatus according to claim 1, characterized in that, The pre-fixing member (3) is provided with positioning holes (31) at both ends. The positioning holes (31) are used to connect the pre-fixing member (3) and the pressure plate assembly (1), and the limiting part (32) is provided with the positioning holes (31).

6. The chemical needle bed apparatus according to claim 1, characterized in that, The chemical needle bed device further includes a frame assembly (4), the pressure plate assembly (1) is movably connected to the frame assembly (4), the frame assembly (4) includes two centering rods (41), the centering rods (41) are arranged parallel to the first horizontal direction, and, Along the vertical direction, two centering rods (41) are disposed above the pressure plate assembly (1). Along the horizontal second direction, one centering rod (41) is located on one side of the center of the pressure plate assembly (1), and the other centering rod (41) is located on the other side of the center of the pressure plate assembly (1). The vertical direction, the horizontal first direction, and the horizontal second direction are perpendicular to each other.

7. The chemical needle bed apparatus according to claim 6, characterized in that, Along the second horizontal direction, the centering rod (41) is adjustable in position, and along the second horizontal direction, the offset between the center of the line connecting the two centering rods (41) and the center of the pressure plate assembly (1) does not exceed 50 mm.

8. The chemical needle bed apparatus according to claim 1, characterized in that, Along the second horizontal direction, the total width of the limiting portion (32) within the same clamping space (100) is greater than one-third of the length of the battery (200).

9. The chemical needle bed apparatus according to claim 1, characterized in that, The pre-fixing member (3) is a sheet-like part, and the thickness of the sheet-like part is less than 2 mm.

10. The chemical needle bed apparatus according to claim 1, characterized in that, The pressure plate assembly (1) includes a buffer pad (12), and the clamping space (100) is defined between the buffer pads (12) of two adjacent pressure plate assemblies (1), and there is an anti-interference gap k of at least 0.2 mm between the probe plate (22) of the electrical connection assembly (2) and the buffer pad (12) along the first horizontal direction.

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