Hand-automatic compatible type needle plate mechanism for charging and discharging of square power lithium ion battery

Abstract

The application discloses a hand-automatic compatible type changing needle plate mechanism for charging and discharging of square power lithium ion batteries, which comprises a hand adjusting assembly and an automatic adjusting assembly, adopts a series of mechanism designs such as upper and lower rack engagement, linear guide rail adjusting interval, motion direction conversion, position adjusting pin positioning and adjusting, spring pre-pressing and the like, and realizes the functions of hand adjusting and automatic adjusting (which needs to be matched with corresponding automatic type changing tool) of the interval of positive and negative probe assemblies. The application realizes the function of compatibility of single equipment with multiple specifications of battery products, and the automatic type changing function process is automatically carried out, so that the type changing time of products is greatly shortened, and the type changing is efficient and fast. When the automatic type changing function appears unexpected or other automatic faults, the manual operation type changing way is left, so that the production is not delayed.

Description

Technical Field

[0001] This invention relates to a manual / automatic compatible needle plate changing mechanism for charging and discharging square power lithium-ion batteries, belonging to the field of lithium battery testing equipment manufacturing. Background Technology

[0002] The new energy vehicle industry is developing rapidly. As the market share of new energy vehicles continues to increase, the production of square batteries is expanding. However, there are many types of square battery specifications and the pace of updates and iterations is extremely fast.

[0003] Traditional testing equipment, such as probe presses, is primarily designed for single-specification batteries or can accommodate a small number of different specifications. However, adjustments are performed manually, requiring operation from both sides. This process is cumbersome and involves disassembling and reassembling parts. Furthermore, the operation on the stacker crane side involves working at height, posing significant safety risks. When battery production changes, prolonged production line downtime can result in substantial losses.

[0004] For the reasons mentioned above, charging and discharging equipment that is compatible with multiple battery specifications and can automatically or quickly and easily change batteries manually has become an important market demand and development trend. Summary of the Invention

[0005] To address the aforementioned problems, this invention proposes a manual / automatic compatible needle plate changing mechanism for charging and discharging square power lithium-ion batteries. This invention allows for single-sided operation and employs a series of mechanisms including upper and lower rack engagement, linear guide spacing adjustment, linkage, motion direction conversion, positioning pin adjustment, and spring preload. This achieves both manual and automatic adjustment of the spacing between the positive and negative electrode probe assemblies (requiring corresponding automatic changing fixtures).

[0006] The technical solution adopted by this invention to solve its technical problem is:

[0007] A manual / automatic compatible probe plate changing mechanism for charging and discharging square power lithium-ion batteries includes a probe fixing plate (31) and a probe plate assembly (14) mounted on the probe fixing plate (31). The probe fixing plate (31) includes a positive electrode probe plate (12) and a negative electrode probe plate (13) arranged parallel to each other. The space formed between the positive electrode probe plate (12) and the negative electrode probe plate (13) forms a battery clamping station. The extension direction of the long side of the probe fixing plate (31) is defined as the left-right direction, and the extension direction of the short side of the probe fixing plate (31) is defined as the front direction. Rear direction; a needle plate fixing plate (2) is installed above the probe fixing plate (31), one end of the positive electrode connecting copper strip (8) and the negative electrode connecting copper strip (5) are respectively fixed on the needle plate fixing plate (2), and the other end is installed on the long copper strip, which is installed on the copper strip fixing block (16); multiple probe plate assemblies (14) are arranged at intervals in the left-right direction on the positive electrode probe plate (12) and the negative electrode probe plate (13), and the probe plate assemblies (14) on the positive electrode probe plate (12) and the negative electrode probe plate (13) correspond one-to-one in the front-back direction; characterized in that it further includes:

[0008] The manual adjustment assembly (6) is provided at both ends of the probe fixing plate (31), including an upper rack (18), a lower rack (23), a linear guide rail (21), a first slider (34), a roller (25), an adjustment block (26), and a lifting block (28). The lower rack (23) is fixed at both ends of the positive probe plate (12) and the negative probe plate (13). The upper rack (18) is located above the lower rack (23) and can mesh with the lower rack (23). The two ends of the linear guide rail (21) are slidably set on the positive probe plate (12) and the negative probe plate (13) in the front and back directions through the first slider (34). The lifting blocks (28) are provided at the front and back positions above the upper rack (18), and the two ends of the adjustment block (26) are provided at the left and right lifting blocks. The adjusting blocks in the front and rear directions are connected to each other through the adjusting connecting shaft (29). The two lifting blocks in the front and rear directions are respectively connected to the reinforcing connecting shaft (33) on opposite sides. The lower end of the reinforcing connecting shaft (33) is set on the upper rack (18), and the upper end of the reinforcing connecting shaft (33) is fixed on the rack reinforcing rib (27). Rollers (25) are respectively set at both ends of the rack reinforcing rib (27). The rollers (25) are in contact with the upper surface of the lifting block (28) located below. The upper surface of the lifting block (28) includes an inclined section and a flat section. The upper surface of the lifting block (28) is inclined from top to bottom towards the adjusting block (26). When the lifting block moves horizontally, the inclined section contacts the roller, driving the roller to lift. At the same time, the upper rack (18) and the lower rack (23) disengage, realizing the conversion of horizontal movement into vertical movement.

[0009] The automatic adjustment component (7) includes adjustment pins (35). Adjustment pins (35) are respectively provided at both ends of the positive probe plate (12) and the negative probe plate (13). The adjustment pins (35) are used in conjunction with the changing tool located below the needle plate fixing plate (31). When the adjustment pins (35) are inserted into the top block (41) of the changing tool, the top block (41) opens and closes under the action of the motor (44), which drives the probe plate assembly (14) to open and close on the linear guide rail (21) to realize automatic adjustment of the probe (19) spacing.

[0010] Furthermore, the changeover fixture includes a frame, on which several changeover guide pins (40) are spaced apart in the left-right direction on both sides, and the changeover guide pins (40) correspond to the lifting assembly (9); several guide seat connecting plates (39) are arranged side by side in the front-back direction, and top blocks (41) are respectively provided at both ends of the several guide seat connecting plates (39), and the installation position of the top blocks (41) corresponds to the adjusting pins (35); the several guide seat connecting plates (39) are slidably arranged on the frame and slide in the front-back direction; the changeover guide pins (39) move upward to lift the upper rack (18) through the lifting assembly (9), and at the same time the adjusting pins (35) are inserted into the top blocks (41), and the adjusting pins (35) adjust the spacing of the probes (19) by sliding the guide seat connecting plates (39) back and forth.

[0011] Furthermore, a second slider (37) is provided at the bottom of the guide seat connecting plate (39), and a slide rail is provided on the frame along the front-back direction. The second slider (37) is slidably connected to the slide rail and can move along the slide rail in the front-back direction.

[0012] Furthermore, the frame is equipped with a motor (38) and a lead screw (42). The output shaft of the motor (38) is connected to the lead screw (42). The lead screw (42) is arranged in the front-back direction and is connected to the guide seat connecting plate (39). The motor (38) controls the lead screw (42) to rotate, and the lead screw (42) drives the slider to move in the front-back direction.

[0013] Furthermore, the lifting assembly (9) includes lifting plates (20) arranged in the left-right direction, with one plate at the front and one at the back. The two ends of the lifting plates (20) connect the upper racks (18) in the left-right direction together.

[0014] Furthermore, it also includes a positioning component, which is located below the positioning block and includes a positioning screw mounting block (30) and a positioning screw (15) mounted on the positioning screw mounting block (30). By adjusting the positioning screw (15), the positioning block (26) is moved, so that the upper rack (18) and the lower rack (23) are disengaged.

[0015] Furthermore, each end of the adjusting block (26) is provided with a compression spring (36). One end of the compression spring (36) is fixed on the adjusting block (26), and the other end is fixed on the needle plate side plate (10). The needle plate side plate (10) is provided on the outer side of the positive electrode probe plate (12) and the negative electrode probe plate (13). The compression spring (36) ensures that the adjusting block (26) automatically returns to its original position after moving. Each end of the upper rack (18) is provided with a rectangular spring (22) in the vertical direction. The upper end of the rectangular spring (22) is provided with a spring limiting block (17). The rectangular spring (22) ensures that the upper rack (18) can automatically fall back and mesh with the lower rack (23).

[0016] Furthermore, a needle plate scale (32) is provided between the positive electrode probe plate (12) and the negative electrode probe plate (13) to determine the adjustment position.

[0017] Furthermore, linear bearings (24) are respectively provided at both ends of the adjusting connecting shaft (29).

[0018] Furthermore, it also includes a temperature probe plate assembly, which is disposed between the positive electrode probe plate (12) and the negative electrode probe plate (13) for detecting the temperature of the lithium battery.

[0019] The beneficial effects of this invention are:

[0020] 1. This invention provides a manual / automatic compatible type-changing needle plate mechanism that automates, simplifies, and speeds up the replacement of batteries of different specifications during battery charging and discharging production, and is practical and widely applicable.

[0021] 2. Unlike the traditional method, the probe plate of this invention is no longer locked to the frame with screws, but is slidably assembled on the linear guide rail, allowing it to slide freely left and right.

[0022] 3. This invention employs a series of mechanisms, including upper and lower rack meshing, linear guide rail spacing adjustment, linkage, motion direction conversion, positioning pin positioning adjustment, and spring preload, to achieve manual and automatic adjustment of the spacing between the positive and negative probe components (requires corresponding automatic change tooling). Attached Figure Description

[0023] Figure 1a This is an isometric view of the manual / automatic compatible needle plate changing mechanism of the present invention;

[0024] Figure 1b This is a side view of the manual / automatic compatible needle plate changing mechanism of the present invention;

[0025] Figure 1c This is a front view of the manual / automatic compatible needle plate changing mechanism of the present invention;

[0026] Figure 1d This is an attached view of the manual / automatic compatible needle plate changing mechanism of the present invention;

[0027] Figure 2a This is an isometric view of the manual adjustment component of the present invention;

[0028] Figure 2b This is a top view of the manual adjustment component of the present invention;

[0029] Figure 3a This is an isometric view of the automatic adjustment component of the present invention;

[0030] Figure 3b This is a side view of the automatic adjustment component of the present invention;

[0031] Figure 4 This is an isometric view of the tooling for changing parts according to the present invention.

[0032] Explanation of reference numerals in the attached diagram: 1. Power module; 2. Fixing plate on the needle plate; 3. Outer slide rail; 4. Plastic guide rail; 5. Negative electrode adapter copper strip; 6. Manual adjustment assembly; 7. Automatic adjustment assembly; 8. Positive electrode adapter copper strip; 9. Lifting assembly; 10. Needle plate side plate; 11. Temperature needle plate assembly; 12. Positive electrode probe plate; 13. Negative electrode probe plate; 14. Probe plate assembly; 15. Adjustment screw; 16. Copper strip fixing block; 17. Spring limit block; 18. Upper rack; 19. Probe; 20. Rack lifting plate; 21. 22. Linear guide rail; 23. Rectangular spring; 24. Lower rack; 25. Linear bearing; 26. Roller; 27. Adjusting block; 28. Rack reinforcing rib; 29. ​​Lifting block; 30. Adjusting connecting shaft; 31. Adjusting screw mounting block; 32. Probe fixing plate; 33. Needle plate scale; 34. Reinforcing connecting shaft; 35. First slider; 36. Adjusting pin; 37. Compression spring; 38. Second slider; 39. Motor; 40. Guide seat connecting plate; 41. Changing guide pin; 42. Top block; 43. Lead screw. Detailed Implementation

[0033] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of the present invention.

[0034] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0035] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to 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 invention.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0037] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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, an electrical connection, or a connection that allows communication between them; 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, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0038] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0039] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," 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. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0040] The present invention will now be described in detail with reference to the accompanying drawings and exemplary embodiments.

[0041] like Figures 1a to 4 As shown, the present invention provides a manual / automatic compatible probe plate changing mechanism for charging and discharging a square power lithium-ion battery, comprising a probe fixing plate (31) and a probe plate assembly (14) mounted on the probe fixing plate (31). The probe fixing plate (31) includes a positive electrode probe plate (12) and a negative electrode probe plate (13) arranged parallel to each other, and the space formed between the positive electrode probe plate (12) and the negative electrode probe plate (13) forms a battery clamping station. The extension direction of the long side of the probe fixing plate (31) is defined as the left-right direction, and the extension direction of the short side of the probe fixing plate (31) is defined as the right-left direction. The direction is defined as the front-back direction; a pin plate fixing plate (2) is installed above the probe fixing plate (31), one end of the positive electrode connecting copper strip (8) and the negative electrode connecting copper strip (5) are respectively fixed on the pin plate fixing plate (2), and the other end is installed on the long copper strip, which is installed on the copper strip fixing block (16); multiple probe plate assemblies (14) are arranged at intervals in the left-right direction on the positive electrode probe plate (12) and the negative electrode probe plate (13), and the probe plate assemblies (14) on the positive electrode probe plate (12) and the negative electrode probe plate (13) correspond one-to-one in the front-back direction; it also includes:

[0042] The manual adjustment assembly (6) is provided at both ends of the probe fixing plate (31), including an upper rack (18), a lower rack (23), a linear guide rail (21), a first slider (34), a roller (25), an adjustment block (26), and a lifting block (28). The lower rack (23) is fixed at both ends of the positive probe plate (12) and the negative probe plate (13). The upper rack (18) is located above the lower rack (23) and can mesh with the lower rack (23). The two ends of the linear guide rail (21) are slidably set on the positive probe plate (12) and the negative probe plate (13) in the front and back directions through the first slider (34). The lifting blocks (28) are provided at the front and back positions above the upper rack (18), and the two ends of the adjustment block (26) are provided at the left and right lifting blocks. The adjusting blocks in the front and rear directions are connected to each other through the adjusting connecting shaft (29). The two lifting blocks in the front and rear directions are respectively connected to the reinforcing connecting shaft (33) on opposite sides. The lower end of the reinforcing connecting shaft (33) is set on the upper rack (18), and the upper end of the reinforcing connecting shaft (33) is fixed on the rack reinforcing rib (27). Rollers (25) are respectively set at both ends of the rack reinforcing rib (27). The rollers (25) are in contact with the upper surface of the lifting block (28) located below. The upper surface of the lifting block (28) includes an inclined section and a flat section. The upper surface of the lifting block (28) is inclined from top to bottom towards the adjusting block (26). When the lifting block moves horizontally, the inclined section contacts the roller, driving the roller to lift. At the same time, the upper rack (18) and the lower rack (23) disengage, realizing the conversion of horizontal movement into vertical movement.

[0043] The automatic adjustment component (7) includes adjustment pins (35). Adjustment pins (35) are respectively provided at both ends of the positive probe plate (12) and the negative probe plate (13). The adjustment pins (35) are used in conjunction with the changing tool located below the needle plate fixing plate (31). When the adjustment pins (35) are inserted into the top block (41) of the changing tool, the top block (41) opens and closes under the action of the motor (44), which drives the probe plate assembly (14) to open and close on the linear guide rail (21) to realize automatic adjustment of the probe (19) spacing.

[0044] In one embodiment, the changing fixture includes a frame, on which a plurality of changing guide pins (40) are spaced apart in the left-right direction on both sides, and the changing guide pins (40) correspond to the lifting components (9); the frame is provided with a plurality of guide seat connecting plates (39) arranged side by side in the front-back direction, and the top blocks (41) are provided at both ends of the plurality of guide seat connecting plates (39), and the installation position of the top blocks (41) corresponds to the adjusting pins (35); the plurality of guide seat connecting plates (39) are slidably arranged on the frame and slide in the front-back direction; the changing guide pins (39) move upward to lift the upper rack (18) through the lifting components (9), and at the same time the adjusting pins (35) are engaged in the top blocks (41), and the adjusting pins (35) adjust the spacing of the probes (19) by sliding the guide seat connecting plates (39) back and forth.

[0045] In one embodiment, a second slider (37) is provided at the bottom of the guide seat connecting plate (39), and a slide rail is provided on the frame along the front-back direction. The second slider (37) is slidably connected to the slide rail and can move along the slide rail in the front-back direction.

[0046] In one embodiment, a motor (38) and a lead screw (42) are provided on the frame. The output shaft of the motor (38) is connected to the lead screw (42). The lead screw (42) is arranged in the front-back direction and is connected to the guide seat connecting plate (39). The motor (38) controls the lead screw (42) to rotate, and the lead screw (42) drives the slider to move in the front-back direction.

[0047] In one embodiment, the lifting assembly (9) includes lifting plates (20) arranged in the left-right direction, with one plate at the front and one at the back, and the two ends of the lifting plates (20) connect the upper racks (18) in the left-right direction together.

[0048] In one embodiment, an adjustment component is also included. The adjustment component located below the adjustment block includes an adjustment screw mounting block (30) and an adjustment screw (15) mounted on the adjustment screw mounting block (30). The adjustment block (26) is moved by adjusting the adjustment screw (15), so that the upper rack (18) and the lower rack (23) disengage.

[0049] In one embodiment, a compression spring (36) is provided at each end of the adjusting block (26). One end of the compression spring (36) is fixed on the adjusting block (26), and the other end is fixed on the needle plate side plate (10). The needle plate side plate (10) is provided on the outer side of the positive electrode probe plate (12) and the negative electrode probe plate (13). The compression spring (36) ensures that the adjusting block (26) automatically returns to its original position after moving. A rectangular spring (22) is provided at each end of the upper rack (18) along the vertical direction. A spring limiting block (17) is provided at the upper end of the rectangular spring (22). The rectangular spring (22) ensures that the upper rack (18) can automatically fall back and mesh with the lower rack (23).

[0050] In one embodiment, a needle plate scale (32) is provided between the positive electrode probe plate (12) and the negative electrode probe plate (13) to determine the adjustment position.

[0051] In one embodiment, linear bearings (24) are respectively provided at both ends of the adjusting connecting shaft (29).

[0052] In one embodiment, a temperature probe plate assembly is also included, disposed between the positive electrode probe plate (12) and the negative electrode probe plate (13), for detecting the temperature of the lithium battery.

[0053] In one embodiment, an outer slide rail (3) is provided on the fixing plate (2) on the needle plate, and several power modules (1) are arranged side by side in the left and right direction on the battery clamping station, and plastic guide rails (4) are provided on both sides of the several power modules (1).

[0054] The principle behind this invention's implementation of manual / automatic adjustment is as follows:

[0055] Automatic adjustment process: When the changing fixture is raised to the position, during the raising process, the changing guide pin 40 on the changing fixture lifts the upper rack 18 by lifting the lifting plate 20, thereby disengaging the upper rack 18 and the lower rack 23. At the same time, the adjusting pin 35 on the probe plate assembly 14 is precisely engaged in the top block of the changing fixture. The motor inside the changing fixture drives the lead screw 42 to rotate, and the lead screw 42 drives the second slider 37 to slide back and forth. The top block 41 opens and closes, thereby driving the probe plate assembly 14 to open and close on the linear guide rail 21, achieving the purpose of adjusting the probe 19 spacing.

[0056] Manual adjustment process: During the tightening of the adjusting screw on the adjusting screw mounting block 30, the adjusting block 26 is pushed to move. The lifting block 28 and the adjusting block 26 are an integral connection structure. The lifting block 28 moves, driving the roller 25 to rise. Since the rack reinforcing rib 27, the reinforcing connecting shaft 33 and the upper rack 18 are connected as one unit, the upper rack 18 will rise synchronously and disengage from the lower rack 23. The operator manually moves the probe plate assembly 14 to slide it on the linear guide rail 21 to the designated position. The adjustment is confirmed by the needle plate scale 32. The adjusting screw is loosened, and the upper rack 18 will automatically fall back due to the presence of the rectangular spring and engage with the lower rack 23, completing the position adjustment.

[0057] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A manual / automatic compatible probe plate changing mechanism for charging and discharging a square power lithium-ion battery, comprising a probe fixing plate (31) and a probe plate assembly (14) mounted on the probe fixing plate (31), wherein the probe fixing plate (31) includes a positive electrode probe plate (12) and a negative electrode probe plate (13) arranged parallel to each other, and the space formed between the positive electrode probe plate (12) and the negative electrode probe plate (13) forms a battery clamping station; the extension direction of the long side of the probe fixing plate (31) is defined as the left-right direction, and the extension direction of the short side of the probe fixing plate (31) is defined as... The meaning is the front-back direction; a needle plate fixing plate (2) is installed above the probe fixing plate (31), one end of the positive electrode connecting copper strip (8) and the negative electrode connecting copper strip (5) are respectively fixed on the needle plate fixing plate (2), and the other end is installed on the long copper strip, which is installed on the copper strip fixing block (16); multiple probe plate assemblies (14) are arranged at intervals in the left-right direction on the positive electrode probe plate (12) and the negative electrode probe plate (13), and the probe plate assemblies (14) on the positive electrode probe plate (12) and the negative electrode probe plate (13) correspond one-to-one in the front-back direction; the characteristic is that, Also includes: The manual adjustment assembly (6) is provided at both ends of the probe fixing plate (31), including an upper rack (18), a lower rack (23), a linear guide rail (21), a first slider (34), a roller (25), an adjustment block (26), and a lifting block (28). The lower rack (23) is fixed at both ends of the positive probe plate (12) and the negative probe plate (13). The upper rack (18) is located above the lower rack (23) and can mesh with the lower rack (23). The two ends of the linear guide rail (21) are slidably set on the positive probe plate (12) and the negative probe plate (13) in the front and back directions through the first slider (34). The lifting blocks (28) are respectively provided at the front and back positions above the upper rack (18), and the two ends of the adjustment block (26) are respectively provided at the lifting blocks in the left and right directions. The adjusting blocks in the front and rear directions are connected to each other through the adjusting connecting shaft (29). The two lifting blocks in the front and rear directions are respectively connected to the reinforcing connecting shaft (33) on opposite sides. The lower end of the reinforcing connecting shaft (33) is set on the upper rack (18), and the upper end of the reinforcing connecting shaft (33) is fixed on the rack reinforcing rib (27). Rollers (25) are respectively set at both ends of the rack reinforcing rib (27). The rollers (25) are in contact with the upper surface of the lifting block (28) located below. The upper surface of the lifting block (28) includes an inclined section and a flat section. The upper surface of the lifting block (28) is inclined from top to bottom towards the adjusting block (26). When the lifting block moves horizontally, the inclined section contacts the roller, driving the roller to rise. At the same time, the upper rack (18) and the lower rack (23) disengage, realizing the conversion of horizontal movement into vertical movement. The automatic adjustment component (7) includes adjustment pins (35). Adjustment pins (35) are respectively provided at both ends of the positive probe plate (12) and the negative probe plate (13). The adjustment pins (35) are used in conjunction with the changing tool located below the probe fixing plate (31). When the adjustment pins (35) are inserted into the top block (41) of the changing tool, the top block (41) opens and closes under the action of the motor (38), which drives the probe plate assembly (14) to open and close on the linear guide rail (21) to realize automatic adjustment of the probe (19) spacing. It also includes a positioning component, which is located below the positioning block. The positioning component includes a positioning screw mounting block (30) and a positioning screw (15) mounted on the positioning screw mounting block (30). By adjusting the positioning screw (15), the positioning block (26) is moved, so that the upper rack (18) and the lower rack (23) disengage. Each end of the adjusting block (26) is provided with a compression spring (36). One end of the compression spring (36) is fixed on the adjusting block (26), and the other end is fixed on the needle plate side plate (10). The needle plate side plate (10) is provided on the outer side of the positive electrode probe plate (12) and the negative electrode probe plate (13). The compression spring (36) ensures that the adjusting block (26) automatically returns to its original position after moving. Each end of the upper rack (18) is provided with a rectangular spring (22) in the vertical direction. The upper end of the rectangular spring (22) is provided with a spring limit block (17). The rectangular spring (22) ensures that the upper rack (18) can automatically fall back and mesh with the lower rack (23).

2. The manual / automatic compatible needle plate changing mechanism for charging and discharging square power lithium-ion batteries as described in claim 1, characterized in that, The changeover fixture includes a frame, on which several changeover guide pins (40) are spaced apart in the left and right directions on both sides. The changeover guide pins (40) correspond to the lifting components (9). Several guide seat connecting plates (39) are arranged side by side in the front and back directions on the frame. Top blocks (41) are respectively provided at both ends of the several guide seat connecting plates (39). The installation position of the top blocks (41) corresponds to the adjustment pins (35). The several guide seat connecting plates (39) are slidably arranged on the frame and slide in the front and back directions. The changeover guide pins (40) move upward and lift the upper rack (18) through the lifting components (9). At the same time, the adjustment pins (35) are inserted into the top blocks (41). The adjustment pins (35) adjust the spacing of the probes (19) by sliding the guide seat connecting plates (39) back and forth.

3. The manual / automatic compatible needle plate changing mechanism for charging and discharging square power lithium-ion batteries as described in claim 2, characterized in that... The bottom of the guide seat connecting plate (39) is provided with a second slider (37), and a slide rail is provided on the frame along the front-back direction. The second slider (37) is slidably connected to the slide rail and can move along the slide rail in the front-back direction.

4. A manual / automatic compatible needle plate changing mechanism for charging and discharging square power lithium-ion batteries as described in claim 2 or 3, characterized in that, The frame is equipped with a motor (38) and a lead screw (42). The output shaft of the motor (38) is connected to the lead screw (42). The lead screw (42) is arranged in the front-back direction and is connected to the guide seat connecting plate (39). The motor (38) controls the lead screw (42) to rotate, and the lead screw (42) drives the slider to move in the front-back direction.

5. The manual / automatic compatible needle plate changing mechanism for charging and discharging square power lithium-ion batteries as described in claim 2, characterized in that, The lifting assembly (9) includes lifting plates (20) arranged in the left and right directions, with one plate at the front and one at the back. The two ends of the lifting plates (20) connect the upper racks (18) in the left and right directions together.

6. The manual / automatic compatible needle plate changing mechanism for charging and discharging square power lithium-ion batteries as described in claim 1, characterized in that, A needle plate scale (32) is provided between the positive electrode probe plate (12) and the negative electrode probe plate (13) to determine the adjustment position.

7. The manual / automatic compatible needle plate changing mechanism for charging and discharging square power lithium-ion batteries as described in claim 1, characterized in that, Linear bearings (24) are respectively provided at both ends of the adjustment connecting shaft (29).

8. The manual / automatic compatible needle plate changing mechanism for charging and discharging square power lithium-ion batteries as described in claim 1, characterized in that, It also includes a temperature probe plate assembly, which is disposed between the positive electrode probe plate (12) and the negative electrode probe plate (13) for detecting the temperature of the lithium battery.

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