CN216847874U - Laminate fixture of laminate polymer battery utmost point ear - Google Patents

Abstract

The utility model provides a laminating device for a soft package battery tab, which is suitable for carrying out large and small current charging and discharging tests on the soft package battery tab. The pressing device comprises a base (1) which comprises a base plate (11) and a side plate (12); the voltage sheet (21) and the current sheet (22) are arranged above the substrate (11), and the voltage sheet (21) and the current sheet (22) are provided with a corresponding voltage contact (23) and a corresponding current contact (24); the plane connecting rod mechanism (3) is arranged above the base (1) and is used for driving the pressure head assembly (4); and the pressure head assembly (4) is arranged at the output end of the plane connecting rod mechanism (3), and is rotationally arranged relative to the rack (31) through the plane connecting rod mechanism (3) and used for laminating the soft package battery tab. Adopt this compression fittings, need not use very big power gas and efficiency is higher to operating personnel, need not punch on utmost point ear, and it is big to produce strength, is applicable to big or small electric current charge-discharge, can make thickness utmost point ear all flatten.

Description

Laminate fixture of laminate polymer battery utmost point ear

Technical Field

The utility model relates to the technical field of soft package battery testing, in particular to a laminating device for a tab of a soft package battery.

Background

The soft package battery has the characteristics of flexible design, light weight, small internal resistance, difficult explosion, multiple cycle times, high energy density and the like, improves the energy density of the power battery, and is widely applied to the 3C consumer electronics industry.

Referring to fig. 7 and 8, most of the existing clamps for testing soft package batteries with small current are composed of two hinged clamping plates, and a fixed copper sheet is arranged between the two clamping plates and provided with an interface for connecting a detection instrument. When the clamp is used, the clamp is opened manually, the positive pole tab or the negative pole tab of the battery is inserted into the clamping opening, then the clamp is released, and the positive pole tab or the negative pole tab of the soft package battery is clamped by the clamp under the action of the reset pressure spring. The prior clamp has the following disadvantages: 1. the clamp needs to ensure that good electric contact needs large pressure of the reset pressure spring, but the pressure of the reset pressure spring is large, the hand pressure is hard during operation, and the clamp has higher requirements on the strength of operators. 2. It is only suitable for small current test. 3. When testing thicker utmost point ear laminate polymer battery, utmost point ear and test fixture are the point contact, lead to the condition such as serious of generating heat during the test easily. 4. When the thin and narrow soft-package battery with the tab is tested, the upper clamping piece and the lower clamping piece of the polymer clamp are in complete contact, so that the voltage collected during the test is not the real voltage of the tab of the battery, but the tail end voltage of the test clamp.

When a high-current test is carried out on a soft package battery, a voltage sensor wire and a current lead homopolar lug are connected, holes are generally punched on the lug, and then the voltage sensor wire and the current lead homopolar lug are fixed through bolts. The soft-package battery cell tab usually adopts aluminum (positive electrode) and nickel (negative electrode), and the tab is soft and easy to bend no matter the tab is made of aluminum or nickel. Therefore, the contact area and the contact resistance between the wire nose of the current lead and the tab are difficult to control, so that when the soft package battery cell is tested, the constant voltage charging voltage is unstable, the internal resistance test is greatly influenced by the contact resistance, and the fixed point temperature rise is high during large-current charging and discharging. In addition, in consideration of bearing, the tray for placing the tested soft package battery cell in some test equipment is made of white steel conductive materials, the weight of the current lead is large, and the bent tab is easily contacted with the white steel tray, so that potential safety hazards exist.

The utility model patent of publication No. CN212542628U discloses a coupling device of soft-packaged electrical core utmost point ear, including casing, first clamp splice, second clamp splice and compressing tightly the piece. The tab is clamped tightly by the two clamping blocks, and the original structure of the battery cell is not damaged without punching on the tab. The mode through clamp splice crimping can guarantee to have enough big area of contact with soft-packaged electrical core utmost point ear, guarantees contact resistance as little as possible, improves the measuring accuracy, when heavy current discharges, also can not make the contact point serious that generates heat. The two clamping blocks are respectively provided with a wiring end, and the voltage sensor and the current lead are respectively connected to the two wiring ends, so that the voltage acquisition of the battery cell is isolated from the current lead, and the voltage acquisition error caused by contact resistance can be reduced. The shell is made of an insulating material, and through external insulation, the insulation of the tray in the same test equipment can be guaranteed, and the safety factor is improved. But utmost point ear among the above-mentioned device will be put into from the bottom, inconvenient operation, and it is good accurate control to compress tightly the power moreover to guarantee that clamp splice and soft-packaged electric core utmost point ear have enough big area of contact, only be applicable to the heavy current test.

Disclosure of Invention

The utility model aims to solve the technical problem of providing the laminating device of the soft-package battery tab, which does not need to use great strength for operators and has higher efficiency, and can accurately detect the charging and discharging tests of large and small currents. The utility model adopts the plane connecting rod mechanism to replace manual clamping, is more labor-saving and simple in structure, does not need to punch holes on the lugs, has large pressing force of the plane connecting rod mechanism, can flatten the thick and thin lugs uniformly, has more accurate measuring result and is durable. Compared with the original clamping mechanism, the novel concept scheme is provided, and unexpected effects are achieved.

The technical scheme adopted by the utility model is as follows: the utility model provides a laminate arrangement of laminate polymer battery utmost point ear, includes: a base including a base plate and a side plate; a voltage sheet and a current sheet sequentially disposed on the substrate; the plane connecting rod mechanism is arranged on the substrate and is used for driving the pressure head assembly; and the pressure head assembly is arranged at the output end of the plane connecting rod mechanism, is rotatably arranged relative to the base through the plane connecting rod mechanism and is used for pressing the voltage sheet and the current sheet.

Preferably, a clamping block is arranged on the back face of the base plate, and the clamping block detachably arranges the pressing device on the test tray. Through setting up the fixture block, can conveniently fix the device on test tray fast.

Preferably, the fixture block comprises two L-shaped plates which are arranged oppositely, and the distance between the L-shaped plates is matched with the size of the test tray. And the L-shaped clamping block is adopted, so that the pressing device is conveniently fixed on the test tray.

Preferably, an insulating sheet is arranged between the base plate and the planar link mechanism. The insulating layer paint on the printed circuit board is prevented from being removed when the plane link mechanism is installed, so that short circuit is avoided.

Preferably, the substrate is provided with a printed circuit board, the voltage sheet is arranged at the end of the printed circuit board, the current sheet is arranged at one side far away from the end of the printed circuit board, and the voltage sheet and the current sheet are respectively conducted with the voltage contact and the current contact through the printed circuit board. The connection is carried out through the printed circuit board, so that the device is simple and practical; in addition, the current sheet is wider than the voltage sheet, so that the current sheet is arranged on one side far away from the end part of the printed circuit board, and the current sheet can be contacted with the soft package battery tab when the tab is too short.

Preferably, the upper surfaces of the voltage sheet and the current sheet are both saw-toothed. The pressing block and the current sheet can be fully contacted with the voltage sheet, poor contact caused by foreign matters on the surface of the battery pole piece is prevented, and the testing accuracy is guaranteed.

Preferably, an insulating stop block is arranged between the voltage sheet and the current sheet. The test data is prevented from being inaccurate due to the fact that the voltage sheet is in contact with the current sheet.

Preferably, a limit baffle is fixedly arranged on the side plate and is positioned between the current sheet and the plane link mechanism. And the phenomenon that the test data is inaccurate due to the fact that the soft package battery tab is too long and contacts with the plane link mechanism is avoided.

Preferably, the plane link mechanism comprises a rack bottom plate arranged on the base plate, a rack side plate is arranged on the rack bottom plate, the rack side plate is in a right trapezoid shape, a driving rod is hinged to the short edge of the rack side plate, and a rocker is hinged to the long edge of the rack side plate; one end of the connecting plate is hinged to the middle of the driving rod, the other end of the connecting plate is hinged to the middle of the rocker, and a handle is arranged at the end part of the driving rod; the rocker is of a splayed structure, the hinged position of the connecting plate is close to the crossed position of the two arms of the rocker, one end, hinged to the rocker, of the connecting plate comprises a protruding limiting structure, and when the rocker rotates to the horizontal position, the limiting surface at the bottom end of the limiting structure is abutted to the upper surface of the crossed position of the two arms of the rocker. The planar link mechanism can generate large pressure, and can flatten the thick and thin tabs of the soft-package battery, so that the tabs are fully contacted with the pressing block, and the accuracy of test data is ensured.

Preferably, the pressure head assembly comprises a pressure head clamping block and a lower pressing block, the upper end of the pressure head clamping block is arranged on the rocker, and a U-shaped groove is formed in the lower end of the pressure head clamping block and used for arranging the lower pressing block. The silica gel material has good elasticity and insulating nature, can guarantee battery tab and anchor clamps abundant contact and security, guarantees the test accuracy.

Compared with the prior art, the utility model has the beneficial effects that:

1. compared with the clamping plate in the prior art, the flat connecting rod mechanism of the pressing device for the soft package battery tab is more labor-saving, generates much more force, and can provide sufficient pressure to flatten the thick and thin tabs.

2. Compared with the prior art, the pressing device for the soft package battery tab does not need to punch on the tab, namely, the original structure of the battery is not damaged, and the pressing device is more convenient and faster.

3. Compared with the utility model, the press-fit device for the soft package battery tab can generate enough pressure, can test small current and has accurate test data.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a top view of the present invention

FIG. 3 is a cross-sectional view of the present invention, wherein the left side is a cross-sectional view and the right side is an external view;

FIG. 4 is a state view of the flat linkage mechanism and ram of the present invention when released;

FIG. 5 is an exploded view of the ram assembly of the present invention;

FIG. 6 is a schematic view of a tie plate structure of the present invention;

fig. 7 is a sectional view of a clamping device of a prior soft-package battery;

fig. 8 is a perspective view of a clamping device of a conventional pouch battery.

In the figure: 1-base, 11-base plate, 12-side plate and 13-clamping block;

21-a voltage sheet, 22-a current sheet, 23-a voltage joint, 24-a current joint, 25-a printed circuit board, 26-an insulating block, 27-a fixing plate, 28-a limiting baffle and 29-an insulating sheet;

3-plane link mechanism, 31-frame, 311-frame bottom plate, 312-frame side plate, 32-driving rod, 33-connecting plate, 331-limiting structure, 332-limiting surface, 34-rocker and 35-handle;

4-a pressure head assembly, 41-a pressure head clamping block, 42-a lower pressing block, 43-a nut, 44-a bayonet gasket and 45-a countersunk head screw.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in the accompanying fig. 1-3, a pressing device for a soft package battery tab comprises: the base 1 is arranged on the test tray, the base 1 comprises a base plate 11 positioned at the bottom of the base plate and side plates 12 positioned at two sides of the base plate, the base plate 11 is connected with the test tray through two L-shaped fixture blocks 13 fixed below the base plate 11, in the embodiment, the openings of the L-shaped fixture blocks 13 are opposite, but a mode that the openings are opposite to each other can also be adopted; the printed circuit board 25 is arranged above the base plate 11, and the printed circuit board 25 is fixedly connected with the base plate 11 through a plurality of fastening bolts; the printed circuit board 25 is sequentially fixed with a voltage sheet 21, a current sheet 22, a fixing plate 27, the planar linkage 3, and a voltage contact 23 and a current contact 24 corresponding to the voltage sheet 21 and the current sheet 22.

The voltage sheet 21, the current sheet 22, the voltage contact 23 and the current contact 24 are fixed on the printed circuit board 25 by soldering. The upper surfaces of the voltage sheet 21 and the current sheet 22 are in a sawtooth shape. The current sheet 22 has a larger area than the voltage sheet 21, the voltage sheet 21 and the current sheet 22 are both square, and the current sheet 22 is wider than the voltage sheet 21. An insulating stop 26 is arranged between the voltage sheet 21 and the current sheet 22. The insulating stopper 26 is fixedly arranged on the side plate 12 of the base 1, and is appropriately sized and used for separating the current sheet 22 from the voltage sheet 21. The fixing plate 27 abuts against the current sheet 22, and in this embodiment, the fixing plate 27 is made of copper, but other conductive materials such as aluminum, silver, etc. may be used instead. The fixing plate 27 is provided with at least three small holes, and the printed circuit board 25 is fixed on the substrate 11 by penetrating the small holes with countersunk bolts. In this embodiment, the voltage contact 23 and the current contact 24 are disposed beside the chassis base 311. Compared with the situation that a voltage contact and a current contact are arranged close to a current sheet, the printed circuit board can be larger, the overcurrent capacity can be stronger, and the requirement of large-current testing can be met. The current contact 24 has a larger area than the voltage contact 23, and the voltage contact 23 and the current contact 24 are connected with a lead respectively and then connected with a test instrument.

As shown in fig. 3, a limiting baffle 28 is disposed between the frame 31 and the current sheet 22, the limiting baffle 28 and the side plate 12 are integrally formed, and a height space for the printed circuit board 25 to penetrate is provided at a lower end of the limiting baffle 28. Stop baffle 28 sets up certain height, prevents that laminate polymer battery utmost point ear from contacting for an excessive time plane link mechanism leads to measuring inaccurate.

As shown in fig. 4, the planar linkage 3 includes a frame 31, a driving rod 32, a connecting plate 33, and a rocker 34. The frame 31 includes two L-shaped plates of bilateral symmetry, and frame bottom plate 311 passes through the bolt fastening and is in on the base plate 11, and frame curb plate 312 is right trapezoid, the minor face upper end of frame curb plate 312 articulates there is active lever 32, and long limit upper end articulates there is rocker 34, even board 33 one end articulates in active lever 32 middle part, and the other end articulates in rocker 34 middle part, active lever 32 tip is provided with handle 35. The rocker 34 is in a splayed structure, and the hinged position of the connecting plate 33 is close to the crossed position of two arms of the rocker 34. As shown in fig. 6, one end of the connecting plate 33 hinged to the rocker 34 includes a raised limiting structure 331, and when the rocker 34 rotates to the horizontal position, a limiting surface 332 of the limiting structure 331 is just abutted to the upper surface of the intersection position of the two arms of the rocker 34.

As shown in an exploded view of a pressure head assembly shown in fig. 5, the pressure head assembly 4 is fixed on the rocker 34 through a nut 43 and a bayonet washer 44, the bayonet washer 44 is arranged between the nut 43 and the rocker 34, free ends of two sides of the bayonet washer 44 are just clamped on the rocker 34, a circular hole for a countersunk screw 45 to pass through is formed in the middle of the bayonet washer 44, the lower end of the pressure head clamping block 41 is U-shaped, and the lower pressing block 42 is arranged in the U-shaped groove through interference fit to prevent the lower pressing block 43 from falling off from the U-shaped groove. In this embodiment, the lower pressing block 42 is made of a silicone material, has a certain hardness, and has good elasticity and insulation, but other materials having the above-mentioned properties, such as latex, urethane rubber, and the like, may also be used.

In this embodiment, the height of the fixing plate 27 is not higher than that of the voltage sheet 21 and the current sheet 22. The fixing plate is prevented from blocking the head of the inserted tab.

In this embodiment, the height of the side plate 12 is slightly higher than that of the voltage sheet 21 and the current sheet 22, so as to prevent foreign matters from entering the voltage sheet and the current sheet during testing, which results in inaccurate measurement data.

In this embodiment, the joints of the voltage sheet 21, the current sheet 22 and the fixing plate 27 with the printed circuit board 25 are all coated with tin, so as to increase the conductivity and the stability.

In this embodiment, an insulating sheet 29 is disposed between the chassis base 311 and the printed circuit board 25.

When the laminating device for the soft package battery tab is used, the laminating device comprises the following components:

1) fixing the pressing device of the two soft package battery tabs on the test platform through a fixture block 13;

2) placing the positive tab of the soft package battery on the voltage sheet 21 and the current sheet 22 so that the positive tab can be in contact with both the voltage sheet 21 and the current sheet 22;

3) the handle 35 is rotated upwards, the connecting plate 33 rotates upwards along with the driving rod 32, the rocker 34 rotates downwards along with the connecting plate 33, the lower pressing block 42 and the pressing head clamping block 41 move downwards along with the rocker 34, and the state of the plane connecting rod mechanism 3 is shown in fig. 4;

4) when the rocker 34 moves to the horizontal position, at the same time, the limiting surface 332 at the bottom end of the limiting structure 331 is just abutted to the upper surface of the intersection position of the two arms of the rocker 34, at this time, the lower pressing block 42 can generate enough force to flatten the positive tab of the soft package battery, and the state at this time is as shown in fig. 1;

5) and flattening the negative electrode lug of the soft package battery in another pressing device by the operations of the steps 1 to 3, finally connecting a conducting wire to the voltage contact 23 and the current contact 24 respectively, and then connecting a testing instrument, and completing the charging and discharging test of the soft package battery after the detection is error-free.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (10)

1. The utility model provides a laminate fittings of laminate polymer battery utmost point ear which characterized in that includes:

a base (1) including a base plate (11) and a side plate (12);

a voltage sheet (21) and a current sheet (22) which are arranged on the substrate (11) in sequence;

the plane connecting rod mechanism (3) is arranged on the base plate (11) and is used for driving the pressure head assembly (4);

the pressure head assembly (4) is arranged at the output end of the plane link mechanism (3), and the pressure head assembly (4) is rotatably arranged relative to the base (1) through the plane link mechanism (3) and is used for pressing and placing battery tabs between the pressure head assembly (4) and the voltage sheet (21) and between the voltage sheet (22).

2. The laminating device for the soft-package battery tab according to claim 1, characterized in that: the back of the base plate (11) is provided with a clamping block (13), and the clamping block (13) fixes the pressing device on the test tray.

3. The laminating device for the soft package battery tab according to claim 2, characterized in that: the fixture block (13) comprises two L-shaped plates which are oppositely arranged, and the distance between the L-shaped plates is matched with the size of the test tray.

4. The laminating device for the soft package battery tab according to claim 1, characterized in that: an insulating sheet (29) is arranged between the substrate (11) and the plane connecting rod mechanism (3).

5. The laminating device for the soft-package battery tab according to claim 1, characterized in that: the circuit board is characterized in that a printed circuit board (25) is fixed on the substrate (11), the voltage sheet (21) is arranged at the end part of the printed circuit board (25), the current sheet (22) is arranged at one side far away from the end part of the printed circuit board (25), and the voltage sheet (21) and the current sheet (22) are respectively conducted with the voltage contact (23) and the current contact (24) through the printed circuit board (25).

6. The laminating device for the soft-package battery tab according to claim 5, characterized in that: the upper surfaces of the electric pressing sheet (21) and the current sheet (22) are both in a sawtooth shape.

7. The laminating device for the soft-package battery tab according to claim 5, characterized in that: an insulating stop block (26) is arranged between the voltage sheet (21) and the current sheet (22).

8. The laminating device for the soft package battery tab according to claim 1 or 5, characterized in that: a limiting baffle (28) is arranged on the side plate (12), and the limiting baffle (28) is located between the current sheet (22) and the plane link mechanism (3).

9. The laminating device for the soft package battery tab according to claim 1, characterized in that: the plane connecting rod mechanism (3) comprises a rack bottom plate (311) arranged on the base plate (11), a rack side plate (312) is arranged on the rack bottom plate (311), the rack side plate (312) is in a right trapezoid shape, a driving rod (32) is hinged to the short edge of the rack side plate (312), a rocker (34) is hinged to the long edge of the rack side plate, one end of a connecting plate (33) is hinged to the middle of the driving rod (32), the other end of the connecting plate is hinged to the middle of the rocker (34), and a handle (35) is arranged at the end part of the driving rod (32); the rocker (34) is of a splayed structure, the hinged position of the connecting plate (33) is close to the crossed position of two arms of the rocker (34), one end, hinged to the rocker (34), of the connecting plate (33) comprises a protruding limiting structure (331), and when the rocker (34) rotates to the horizontal position, a limiting surface (332) at the bottom end of the limiting structure (331) is abutted to the upper surface of the crossed position of the two arms of the rocker (34).

10. The laminating device for the soft package battery tab according to claim 1, characterized in that: the pressure head assembly (4) comprises a pressure head clamping block (41) and a lower pressing block (42), the upper end of the pressure head clamping block (41) is arranged on the rocker (34), and a U-shaped groove is formed in the lower end of the pressure head clamping block (41) and used for fixing the lower pressing block (42).

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