CN219475801U - Battery cell internal resistance testing device - Google Patents

Abstract

The utility model provides a battery cell internal resistance testing device, which belongs to the technical field of battery detection auxiliary equipment and comprises a mounting frame fixedly mounted on a bottom plate, wherein a resistance tester is fixed in the mounting frame, a vertical electric telescopic rod is arranged at the bottom of the resistance tester, and a metal contact is fixed at the bottom of the electric telescopic rod; the bottom plate is connected with a moving assembly, the moving assembly comprises a screw rod, the screw rod and the mounting seat form a sliding screw rod pair, and the top surface of the mounting seat is fixed with a positioning structure; the utility model solves the problems that the battery is positioned by adopting the fixed positioning table in the existing testing device, the application range of the battery is smaller, and the battery is easily damaged due to the lack of positioning protection when the contact and the positioning table run, not only can the batteries with different widths be positioned and fixed, but also the battery can be limited and protected during testing, and the battery damage caused by misoperation is avoided.

Description

Battery cell internal resistance testing device

Technical Field

The utility model relates to the technical field of battery detection auxiliary equipment, in particular to a battery cell internal resistance testing device.

Background

Since the commercialization of lithium ion batteries in the 90 th century of the 20 th century, the lithium ion batteries have become one of the main power supplies of portable electronic products such as mobile communication, notebook computers and the like due to the advantages of high specific energy, high voltage, high energy density and the like, and the current batteries need to be subjected to internal resistance testing after production to test whether the connection quality reaches the standard or not so as to prevent the high resistance and the high partial pressure, influence the output of the power supply voltage, and the internal resistance of the welded battery cells is detected, so that the quality problem can be effectively detected, and the safety guarantee of finished products is ensured. At present, the internal resistance and voltage test of the battery core of the lithium ion battery are all purely manual operation, and the test is carried out by directly holding a meter pen, so that the method has great risk, and a professional battery core grouping tester is used, so that longer debugging time is required, the cost is higher, and the method cannot be suitable for small-batch lean production.

The Chinese patent literature discloses a battery cell internal resistance testing device (publication number: CN 211206740U), which comprises a base, a sliding material carrying component, an electric contact component, an internal resistance tester and a control box, wherein the sliding material carrying component comprises a sliding block sliding rail component, an electric screw pair and a material carrying plate which are fixedly connected in parallel, the upper parts of the two sliding block sliding rail components are fixedly connected with the material carrying plate, and the upper parts of the material carrying plates are fixedly connected with a positioning carrier. The testing device disclosed in the patent adopts a fixed positioning table to position the battery, but the positioning table can only position the battery with one size during testing, if the battery with larger or smaller size needs to be tested, the positioning table needs to be replaced, and the contact and the positioning table lack positioning protection during operation.

Disclosure of Invention

The utility model aims to solve the problems in the prior art, and provides a battery cell internal resistance testing device which can not only position and fix batteries with different sizes, but also limit and protect the batteries during testing so as to avoid battery damage caused by misoperation.

The aim of the utility model can be achieved by the following technical scheme: the battery cell internal resistance testing device comprises a mounting frame fixedly mounted on a bottom plate, wherein a resistance tester is fixed in the mounting frame, a vertical electric telescopic rod is arranged at the bottom of the resistance tester, and a metal contact is fixed at the bottom of the electric telescopic rod; the bottom plate is connected with a moving assembly, the moving assembly comprises a screw rod, the screw rod and the mounting seat form a sliding screw pair, and the top surface of the mounting seat is fixed with a positioning structure.

Further, the location structure includes fixed frame, fixed frame is fixed in the top of mount pad, one side of fixed frame is fixed with driving motor, driving motor's output shaft is fixed with the threaded rod, the equal threaded connection in both sides of threaded rod surface has the thread bush, the front of thread bush is fixed with the clamping plate, adopts driving motor to drive the clamping plate of both sides and presss from both sides tightly to different width electric core.

Further, the back of the thread bush is fixed with a bump, a guide pillar is fixed between the fixed frames, the guide pillar is connected with the bump in a sliding way, and the bump can be matched with the guide pillar to limit the thread bush.

The staff at first arranges battery cell in the surface of mount pad and starts driving motor, driving motor can press from both sides tightly the cell, the lug can cooperate the guide pillar to carry out spacingly to the thread bush, start motor drive mount pad to inboard removal after pressing from both sides tight cell, and spacing can carry out the side direction location to the battery, start electric telescopic handle after moving to the assigned position, electric telescopic handle moves down metal contact until with the two poles of the battery cell contact, the locating lever cooperation locating piece can carry out spacingly to metal contact when moving, can carry out spacing protection to the battery when the test, resistance tester just can carry out internal resistance detection after the contact.

Further, the friction block is adhered to the inner side of the clamping plate, the friction block is made of rubber materials, and the safety of testing can be improved by adopting the friction block.

Further, the mounting frame is fixed with the board of placing in the inboard, the through-hole has all been seted up to the both sides of placing the board surface, place board upper surface fixation has the resistance tester, the resistance tester passes through the wire with the metal contact and is connected, the bottom of placing the board is fixed with vertical electric telescopic handle.

Furthermore, the bottom of placing the board is fixed with the locating lever, the bottom of locating lever is fixed with the plectane, the back of metal contact is fixed with the locating piece, the locating piece with locating lever sliding connection adopts locating lever and plectane to carry out spacing protection to the battery when the test.

Further, the movable assembly comprises a fixed plate, the fixed plate is embedded in the bottom plate, a motor is fixed on the front surface of the fixed plate, a groove is formed in the fixed plate, an output shaft of the motor penetrates through the fixed plate and is connected with a screw rod, the screw rod is located in the groove, and the screw rod is in sliding fit with a sliding block at the bottom of the mounting seat to form a sliding screw pair.

Further, both sides at fixed plate top all are fixed with spacing, mount pad and spacing sliding connection adopt spacing can carry out the side direction to the battery and fix a position, avoid appearing the poor condition of contact.

Furthermore, all be fixed with the cushion around the bottom plate bottom, the cushion adopts insulating material to make, adopts the cushion to cushion the bottom plate, improves the operating stability of equipment.

The utility model has the beneficial effects that:

1. according to the utility model, the fixing and parallel movement of the battery are realized through the mounting seat, the battery can be limited and protected during testing, and the accurate contact between the metal contact and the battery electrode is realized by utilizing the electric telescopic rod, so that the battery is prevented from being damaged due to misoperation.

2. According to the utility model, the clamping plates at two sides can be driven by the driving motor to position and fix batteries with different widths, the testing range of the testing device is improved, the metal contacts can be vertically limited by matching the positioning rod with the positioning block and the circular plate, the battery translation can be limited by the limiting strip, the batteries can be limited and protected during testing, the battery damage caused by misoperation is avoided, the problem that the battery is easily damaged due to lack of positioning protection of the contacts and the positioning table during operation because the battery is positioned by adopting the fixed positioning table in the conventional testing device is solved, the application range is smaller.

3. According to the utility model, the clamping plates at two sides can be driven by the driving motor to fix the batteries with different widths, so that the testing range of the testing device is improved.

4. According to the utility model, the metal contact can be limited by matching the positioning rod with the positioning block, so that the battery can be limited and protected during testing, and the metal contact is prevented from excessive movement.

Drawings

FIG. 1 is a schematic perspective view of the present utility model;

FIG. 2 is a schematic perspective view of the present utility model;

FIG. 3 is a schematic perspective view of a positioning structure according to the present utility model;

fig. 4 is a schematic view of a partial perspective structure of the present utility model.

1. A bottom plate; 2. a mounting frame; 3. placing a plate; 4. a through hole; 5. a resistance tester; 6. an electric telescopic rod; 7. a metal contact; 8. a fixing plate; 9. a motor; 10. a groove; 11. a screw rod; 12. a mounting base; 121. a slide block; 13. a positioning structure; 131. a fixed frame; 132. a drive motor; 133. a threaded rod; 134. a thread sleeve; 135. a clamping plate; 14. a bump; 15. a guide post; 151. a spacer ring; 16. a friction block; 17. a positioning rod; 171. a circular plate; 18. a positioning block; 19. a limit bar; 20. and (5) cushion blocks.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar symbols indicate like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present utility model and are not to be construed as limiting the present utility model.

Referring to fig. 1-4, a battery cell internal resistance testing device comprises a bottom plate 1, a mounting frame 2 is fixed at the top of the bottom plate 1, a placement plate 3 is fixed at the inner side of the mounting frame 2, through holes 4 are formed in two sides of the surface of the placement plate 3, a resistance tester 5 and a metal contact 7 are connected through the two through holes 4 in a guiding manner, the resistance tester 5 is fixed at the top of the placement plate 3, an electric telescopic rod 6 is fixed at the bottom of the placement plate 3, the metal contact 7 is fixed at the bottom of the electric telescopic rod 6, a moving assembly is connected to the bottom plate 1, the moving assembly comprises a fixing plate 8 and an assembly arranged on the fixing plate 8, translation of a battery is realized, the fixing plate 8 is embedded in the middle of the bottom plate 1, a motor 9 is fixed at the front of the fixing plate 8, a groove 10 is formed in the fixing plate 8, an output shaft of the motor 9 penetrates through the fixing plate 8 and is connected with a lead screw 11, the lead screw 11 and a slide block 121 at the bottom of a mounting seat 12 form a lead screw 11 pair, a positioning structure 13 is fixed at the top of the mounting seat 12, the positioning structure 13 is fixed on the battery, the structure is shown in fig. 3, the two sides of the motor 132 can drive the two sides 135 to clamp the battery cell width to be different, and the applicable range of the testing device can be tested; the bottom of placing the board 3 is fixed with locating lever 17, can retrain metal contact 7 running direction through locating lever 17 cooperation locating piece 18, and the bottom of locating lever 17 is fixed with plectane 171, and the slip of locating lever 17 receives plectane 171 spacing, can spacing metal contact 7 vertical direction's the biggest displacement, can carry out spacing protection to the battery when the test, avoids metal contact 7 excessive displacement. The maximum displacement of the metal contact 7 in the vertical direction is limited, the limiting strip 19 can limit the moving direction and the maximum displacement of the mounting seat 12, meanwhile, the limiting strip can limit the moving direction of the mounting seat 12 through constraint with the groove 10 when the sliding block 121 at the bottom of the mounting seat 12 translates, the moving direction of the mounting seat 12 is limited, further, the limiting of the battery translating direction and the translating depth is realized, the limiting of the maximum displacement of the metal contact 7 and the limiting of the battery translating depth can limit and protect the battery during testing, the battery damage caused by excessive misoperation is avoided, the application range of the testing device is improved, and the problem that the battery is easily damaged due to lack of positioning protection of the contact and the positioning table during operation is avoided.

The location structure 13 includes fixed frame 131, fixed frame 131 is fixed in the top of mount pad 12, one side of fixed frame 131 is fixed with driving motor 132, driving motor 132's output shaft is fixed with threaded rod 133, threaded rod 133 surface's both sides all threaded connection has thread bush 134, thread bush 134's front is fixed with clamping plate 135, driving motor 132 can drive the clamping plate 135 of both sides and can fix a position the battery of different width, the application scope of testing arrangement has been improved, the back of thread bush 134 is fixed with lug 14, be fixed with guide pillar 15 between the fixed frame 131, guide pillar 15 and lug 14 sliding connection, lug 14 can cooperate guide pillar 15 to carry out spacing to thread bush 134, avoid thread bush 134 to rotate when moving, guide pillar 15 fixedly connected with spacer 151 simultaneously, spacer 151 and threaded rod 133 separate the setting, the cover is established in threaded rod 133 outside, spacer 151 is used for preventing to contact with threaded rod 133 when placing the battery, the inboard of clamping plate 135 has friction block 16, friction block 16 adopts the rubber material to make, friction block 16 can improve clamping plate 135 inboard frictional force, the rubber material also has good insulating properties simultaneously, the security of testing has been improved.

Both sides at the top of the fixed plate 8 are respectively fixed with a limit strip 19, the mounting seat 12 is in sliding connection with the limit strips 19, the limit strips 19 guide the displacement of the mounting seat 12, and the battery is positioned through the mounting seat 12 and the displacement is guided by the limit strips 19, so that the accurate contact position of the battery electrode and the metal contact 7 is ensured.

Further, all be fixed with cushion 20 around the bottom of bottom plate 1, cushion 20 adopts insulating material to make, and cushion 20 can cushion bottom plate 1, and insulating material can avoid the external influence to the test, improves the running stability of equipment.

The working principle of the utility model is as follows: when the internal resistance test of the battery cell is carried out, a worker firstly places the battery cell on the surface of the mounting seat 12, then starts the driving motor 132, the driving motor 132 can drive the threaded rod 133 to rotate, the threaded rod 133 can drive the clamping plates 135 on two sides to move oppositely to clamp the cell, the rubber material of the friction block 16 also has good insulating property during clamping, the safety of the test is improved, the bump 14 can cooperate with the guide post 15 to limit the threaded sleeve 134, the motor 9 is started after the cell is clamped, the motor 9 can drive the lead screw 11 to rotate, the lead screw 11 can drive the mounting seat 12 to move inwards, the limiting strip 19 can laterally position the battery, the electric telescopic rod 6 is started after the battery is moved to a specified position, the electric telescopic rod 6 downwards moves the metal contact 7 until the two poles of the battery cell are contacted, the positioning rod 17 cooperates with the positioning block 18 to limit the metal contact 7 during movement, the battery can be subjected to limit protection during the test, the excessive movement of the metal contact 7 is avoided, and the internal resistance tester 5 can carry out internal resistance detection after the contact.

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.

It is to be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counter-clockwise," "axial," "radial," "circumferential," and the like are directional or positional relationships as indicated based on the drawings, merely to facilitate describing the utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the utility model.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

Claims (9)

1. The utility model provides a battery cell internal resistance testing arrangement, includes mounting frame (2) on fixed mounting bottom plate (1), its characterized in that:

a resistance tester (5) is fixed in the mounting frame (2), a vertical electric telescopic rod (6) is arranged at the bottom of the resistance tester (5), and a metal contact (7) is fixed at the bottom of the electric telescopic rod (6);

the base plate (1) is connected with a moving assembly, the moving assembly comprises a screw rod (11), the screw rod (11) and a mounting seat (12) form a sliding screw pair, and a positioning structure (13) is fixed on the top surface of the mounting seat (12).

2. The battery cell internal resistance testing device according to claim 1, wherein: the positioning structure (13) comprises a fixing frame (131), the fixing frame (131) is fixed at the top of the mounting seat (12), a driving motor (132) is fixed on one side of the fixing frame (131), a threaded rod (133) is fixed on an output shaft of the driving motor (132), threaded sleeves (134) are connected with two sides of the surface of the threaded rod (133) in a threaded mode, and clamping plates (135) are fixed on the front face of the threaded sleeves (134).

3. The battery cell internal resistance testing device according to claim 2, wherein: the back of the thread sleeve (134) is fixedly provided with a bump (14), a guide pillar (15) is fixedly arranged between the fixing frames (131), and the guide pillar (15) is in sliding connection with the bump (14).

4. A battery cell internal resistance testing device according to claim 3, wherein: the inner side of the clamping plate (135) is adhered with a friction block (16), and the friction block (16) is made of rubber materials.

5. A battery cell internal resistance testing device according to claim 3, wherein: the electric resistance testing device is characterized in that a placing plate (3) is fixed on the inner side of the mounting frame (2), through holes (4) are formed in two sides of the surface of the placing plate (3), a resistance tester (5) is fixed on the upper surface of the placing plate (3), the resistance tester (5) is connected with a metal contact (7) through a wire, and a vertical electric telescopic rod (6) is fixed at the bottom of the placing plate (3).

6. The battery cell internal resistance testing device according to claim 5, wherein: the bottom of placing board (3) is fixed with locating lever (17), the bottom of locating lever (17) is fixed with plectane (171), the back of metal contact (7) is fixed with locating piece (18), locating piece (18) with locating lever (17) sliding connection.

7. A battery cell internal resistance testing device according to claim 3, wherein: the movable assembly comprises a fixed plate (8), the fixed plate (8) is embedded in the bottom plate (1), a motor (9) is fixed on the front surface of the fixed plate (8), a groove (10) is formed in the fixed plate (8), an output shaft of the motor (9) penetrates through the fixed plate (8) and is connected with a screw rod (11), the screw rod (11) is located in the groove (10), and the screw rod (11) is matched with a sliding block (121) at the bottom of a mounting seat (12) to form a sliding screw rod (11) pair.

8. The battery cell internal resistance testing device according to claim 7, wherein: both sides at the top of the fixed plate (8) are respectively fixed with a limit strip (19), and the mounting seat (12) is in sliding connection with the limit strips (19).

9. The battery cell internal resistance testing device according to claim 2, wherein: cushion blocks (20) are fixedly connected to the periphery of the bottom plate (1), and the cushion blocks (20) are made of insulating materials.