阅读说明：本技术 一种锂电池电芯烘烤夹具及其烘烤方法 (Lithium battery cell baking clamp and baking method thereof ) 是由 李桂洪 刘恩新 周伟 朱一虎 何学祥 于 2021-08-03 设计创作，主要内容包括：本发明公开了一种锂电池电芯烘烤夹具及其烘烤方法,所述夹具包括截面为C型的框架、对称设置于框架两侧的第一夹持杆、第二夹持杆、第三夹持杆、第四夹持杆、用于切换电芯夹持位置的驱动部件,所述框架包括位于上方的第一板体、与第一板体一端相连的第二板体及与第二板体底端相连的第三板体,所述第一夹持杆、第二夹持杆滑动设于第一板体上,所述第三夹持杆、第四夹持杆滑动设于第三板体上。本发明采用交替式夹持的方式,能够对电池的死角进行烘烤,避免电芯内部水分过大,保证锂电池使用时具有优异的性能。(The invention discloses a baking clamp for a lithium battery cell and a baking method thereof, wherein the baking clamp comprises a frame with a C-shaped section, a first clamping rod, a second clamping rod, a third clamping rod, a fourth clamping rod and a driving part for switching a cell clamping position, the first clamping rod, the second clamping rod, the third clamping rod and the fourth clamping rod are symmetrically arranged on two sides of the frame, the frame comprises a first plate body positioned above the frame, a second plate body connected with one end of the first plate body and a third plate body connected with the bottom end of the second plate body, the first clamping rod and the second clamping rod are slidably arranged on the first plate body, and the third clamping rod and the fourth clamping rod are slidably arranged on the third plate body. The invention adopts an alternate clamping mode, can bake dead corners of the battery, avoids overlarge moisture in the battery core, and ensures that the lithium battery has excellent performance when in use.)

1. The utility model provides a lithium cell electricity core toasts anchor clamps which characterized in that: the clamp comprises a frame (1) with a C-shaped section, a first clamping rod (2), a second clamping rod (3), a third clamping rod (4), a fourth clamping rod (5) and a driving part for switching the clamping position of the battery cell, wherein the first clamping rod (2), the second clamping rod (3), the third clamping rod (4), the fourth clamping rod (5) and the driving part are symmetrically arranged at two sides of the frame (1), the frame (1) comprises a first plate body (11) positioned above the frame, a second plate body (12) connected with one end of the first plate body (11) and a third plate body (13) connected with the bottom end of the second plate body (12), the first clamping rod (2) and the second clamping rod (3) are slidably arranged on the first plate body (11), the third clamping rod (4) and the fourth clamping rod (5) are slidably arranged on the third plate body (13), when the driving part is opened, the first clamping rod (2) and the fourth clamping rod (5) are in contact with the battery cell, and the second clamping rod (3) and the third clamping rod (4) are separated from the battery cell, when the driving part is closed, the second clamping rod (3) is in contact with the third clamping rod (4), and the first clamping rod (2) and the fourth clamping rod (5) are separated from the battery cell.

2. The lithium battery cell baking fixture of claim 1, characterized in that: the driving part comprises a telescopic rod (61) arranged on the second plate body (12), a connecting plate (62) connected with the telescopic rod (61), a first guide plate (63) connected with the upper portion of the connecting plate (62), a second guide plate (64) connected with the bottom of the first guide plate (63), a sliding groove (65) used for matching the first guide plate (63) with the second guide plate (64), a first adjusting part used for adjusting the clamping state of the first clamping rod (2) and the second clamping rod (3), a second adjusting part used for adjusting the clamping state of the third clamping rod (4) and the fourth clamping rod (5) and an extrusion part used for keeping the electric core clamped, wherein the first guide plate (63) and the second guide plate (64) move synchronously through the connecting plate (62).

3. The lithium battery cell baking fixture of claim 2, characterized in that: the first adjusting part comprises a first guide groove (661) arranged on a first guide plate (63), a first wedge-shaped part (662) arranged on a first clamping rod (2), a first inclined part (663) arranged on the first guide plate (63) and matched with the first wedge-shaped part (662), a second wedge-shaped part (664) arranged on a second clamping rod (3), a second inclined part (665) arranged on the first guide plate (63) and matched with the second wedge-shaped part (664), and a first sliding part (666) respectively arranged on one side of the first inclined part (663) and the second inclined part (665), wherein the first wedge-shaped part (662) and the second wedge-shaped part (664) are symmetrically arranged, and the first inclined part (663) and the second inclined part (665) are symmetrically arranged.

4. The lithium battery cell baking fixture of claim 2, characterized in that: the second adjusting component comprises a second guide groove (671) arranged on the second guide plate (64), a third wedge-shaped part (672) arranged on the third clamping rod (4), a third inclined part (673) arranged on the second guide plate (64) and matched with the third wedge-shaped part (672), a fourth wedge-shaped part (674) arranged on the fourth clamping rod (5), a fourth inclined part (675) arranged on the second guide plate (64) and matched with the fourth wedge-shaped part (674), and second sliding parts (676) respectively arranged on one sides of the third inclined part (673) and the fourth inclined part (675), wherein the third wedge-shaped part (672) and the fourth wedge-shaped part (674) are symmetrically arranged, the third inclined part (664) and the fourth inclined part (675) are symmetrically arranged, the third wedge-shaped part (672) and the first wedge-shaped part (662) are symmetrically arranged, and the fourth wedge-shaped part (674) and the second wedge-shaped part (674) are symmetrically arranged, the third inclined part (673) is arranged symmetrically to the first inclined part (663), and the fourth inclined part (675) is arranged symmetrically to the second inclined part (665).

5. The lithium battery cell baking fixture of claim 2, characterized in that: the extrusion part comprises abutting parts (681) arranged on the first clamping rod (2), the second clamping rod (3), the third clamping rod (4) and the fourth clamping rod (5) respectively, grooves (682) which are arranged on the first plate body (11) and the third plate body (13) and matched with the abutting parts (681) respectively, and springs (683) arranged between the abutting parts (681) and the grooves (682).

6. The lithium battery cell baking fixture of claim 1, characterized in that: the clamping device is characterized in that cushions (71) are respectively arranged on the first clamping rod (2), the second clamping rod (3), the third clamping rod (4) and the fourth clamping rod (5), and a plurality of convex parts (72) are arranged on the cushions (71).

7. The lithium battery cell baking fixture of claim 1, characterized in that: the inside of first plate body (11) and second plate body (12) is equipped with a plurality of anticreep grooves (81), be equipped with respectively on first supporting rod (2), second supporting rod (3), third supporting rod (4) and fourth supporting rod (5) with anticreep groove (81) matched with anticreep portion (82), the inside in anticreep groove (81) is equipped with only changes groove (83), be equipped with on anticreep portion (82) with only changes groove (83) matched with only changes portion (84).

8. The lithium battery cell baking fixture of claim 3, characterized in that: spherical grooves (91) are formed in the inclined surfaces of the first wedge-shaped portion (662), the second wedge-shaped portion (664), the third wedge-shaped portion (672) and the fourth wedge-shaped portion (674), first balls (92) and second balls (93) are arranged inside the spherical grooves (91), and the first balls (92) and the second balls (93) are in contact.

9. A method for baking a battery cell by using the lithium battery cell baking clamp of any one of claims 1 to 8 is characterized by comprising the following steps:

s1, placing the battery cell into a clamp, and positioning and clamping;

s2, the clamp and the battery cell are conveyed into an oven, and the oven is vacuumized to less than 50Pa for less than or equal to 5 min;

s3, introducing dry gas into the oven, wherein the introducing time is less than or equal to 3 min;

s4, electrifying the clamp, heating to 80-85 ℃, and electrifying for heating time being less than or equal to 40 min;

s5, vacuumizing again to less than 50Pa for less than or equal to 5min, keeping the temperature of the clamp at 80-85 ℃ in a vacuum state, baking the battery cell for 120-150min, and vacuumizing once every 40-50min in the baking process for less than or equal to 2min each time;

s6, stopping heating after the baking time is reached, introducing dry gas into the oven for less than or equal to 5min, and taking out the battery cell;

and S7, sending the battery cell into cooling equipment, cooling the battery cell for 30 +/-5 min to ensure that the temperature of the battery cell is cooled to 45-55 ℃, and baking the battery cell.

Technical Field

The invention belongs to the technical field of lithium batteries, and particularly relates to a lithium battery cell baking clamp and a baking method thereof.

Background

The lithium cell has excellent performance, and electric core is the core element in the lithium cell, and electric core needs toast in order to reduce the inside moisture of electric core before the installation, and the problem that prior art exists is: current electric core need use anchor clamps to fix when toasting usually, then toast in putting the oven, and current anchor clamps have certain area of contact when centre gripping electric core, and this contact surface is difficult to toast completely, can cause local moisture too big, and normal use can produce the too big problem of local resistance.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a lithium battery cell baking clamp and a baking method thereof, which have the advantages of adopting an alternate clamping mode, being capable of baking dead corners of a battery, avoiding overlarge moisture in the cell, ensuring excellent performance of the lithium battery when in use, and solving the problems that the existing cell is usually fixed by using a clamp and then is placed in a baking oven for baking, and the existing clamp has a certain contact area when clamping the cell, so that the contact surface is difficult to be completely baked, the local moisture is overlarge, and the local resistance is overlarge when in normal use.

The invention is realized in such a way that the lithium battery cell baking clamp comprises a frame with a C-shaped section, a first clamping rod, a second clamping rod, a third clamping rod, a fourth clamping rod and a driving part, wherein the first clamping rod, the second clamping rod, the third clamping rod and the fourth clamping rod are symmetrically arranged at two sides of the frame, the driving part is used for switching the clamping position of the cell, the frame comprises a first plate body positioned above, a second plate body connected with one end of the first plate body and a third plate body connected with the bottom end of the second plate body, the first clamping rod and the second clamping rod are slidably arranged on the first plate body, the third clamping rod and the fourth clamping rod are slidably arranged on the third plate body, when the driving part is opened, the first clamping rod and the fourth clamping rod are in contact with the battery cell, the second clamping rod and the third clamping rod are separated from the battery cell, when the driving part is closed, the second clamping rod is in contact with the third clamping rod, and the first clamping rod and the fourth clamping rod are separated from the battery core.

Preferably, the driving part includes a telescopic rod disposed on the second plate, a connecting plate connected to the telescopic rod, a first guide plate connected to the upper side of the connecting plate, a second guide plate connected to the bottom of the first guide plate, a sliding groove for the first guide plate and the second guide plate to fit, a first adjusting part for adjusting the clamping state of the first clamping rod and the second clamping rod, a second adjusting part for adjusting the clamping state of the third clamping rod and the fourth clamping rod, and a pressing part for holding the cell clamped, and the first guide plate and the second guide plate move synchronously through the connecting plate.

Preferably, the first adjusting member includes a first guide groove provided on the first guide plate, a first wedge portion provided on the first clamping rod, a first inclined portion provided on the first guide plate and engaged with the first wedge portion, a second wedge portion provided on the second clamping rod, a second inclined portion provided on the first guide plate and engaged with the second wedge portion, and first sliding portions provided on one sides of the first inclined portion and the second inclined portion, respectively, wherein the first wedge portion and the second wedge portion are symmetrically provided, and the first inclined portion and the second inclined portion are symmetrically provided.

Preferably, the second adjusting member includes a second guide groove formed on the second guide plate, a third wedge portion formed on the third clamping rod, a third inclined portion formed on the second guide plate and engaged with the third wedge portion, a fourth wedge portion formed on the fourth clamping rod, a fourth inclined portion formed on the second guide plate and engaged with the fourth wedge portion, and second sliding portions respectively formed on one sides of the third inclined portion and the fourth inclined portion, the third wedge portion and the fourth wedge portion are symmetrically disposed, the third inclined portion and the fourth inclined portion are symmetrically disposed, the third wedge portion and the first wedge portion are symmetrically disposed, the fourth wedge portion and the second wedge portion are symmetrically disposed, the third inclined portion and the first inclined portion are symmetrically disposed, and the fourth inclined portion and the second inclined portion are symmetrically disposed.

Preferably, the pressing member includes abutting portions respectively disposed on the first clamping rod, the second clamping rod, the third clamping rod and the fourth clamping rod, grooves respectively disposed on the first plate and the third plate and engaged with the abutting portions, and springs disposed between the abutting portions and the grooves.

Preferably, the first clamping rod, the second clamping rod, the third clamping rod and the fourth clamping rod are respectively provided with a soft pad, and the soft pads are provided with a plurality of convex parts.

Preferably, the first plate body and the second plate body are internally provided with a plurality of anti-drop grooves, the first clamping rod, the second clamping rod, the third clamping rod and the fourth clamping rod are respectively provided with an anti-drop part matched with the anti-drop grooves, the anti-drop grooves are internally provided with anti-drop grooves, and the anti-drop parts are provided with anti-drop parts matched with the anti-drop grooves.

Preferably, the inclined surfaces of the first wedge-shaped part, the second wedge-shaped part, the third wedge-shaped part and the fourth wedge-shaped part are respectively provided with a spherical groove, a first ball and a second ball are arranged in the spherical grooves, and the first ball and the second ball are in contact with each other.

In addition, the invention also provides a method for baking the battery core by adopting the lithium battery core baking clamp, which comprises the following steps:

s1, placing the battery cell into a contact type clamp, and positioning and clamping;

s2, the clamp and the battery cell are conveyed into an oven, and the oven is vacuumized to less than 50Pa for less than or equal to 5 min;

s3, introducing dry gas into the oven, wherein the introducing time is less than or equal to 3 min;

s4, electrifying the clamp, heating to 80-85 ℃, and electrifying for heating time being less than or equal to 40 min;

s5, vacuumizing again to less than 50Pa for less than or equal to 5min, keeping the temperature of the clamp at 80-85 ℃ in a vacuum state, baking the battery cell for 120-150min, and vacuumizing once every 40-50min in the baking process for less than or equal to 2min each time;

s6, stopping heating after the baking time is reached, introducing dry gas into the oven for less than or equal to 5min, and taking out the battery cell;

and S7, sending the battery cell into cooling equipment, cooling the battery cell for 30 +/-5 min to ensure that the temperature of the battery cell is cooled to 45-55 ℃, and baking the battery cell.

Compared with the prior art, the invention has the following beneficial effects:

1. according to the invention, through the arrangement of the frame, the first clamping rod, the second clamping rod, the third clamping rod, the fourth clamping rod and the driving part, the clamping position of the battery cell can be switched, and the problem that the existing clamp cannot partially bake the battery cell to cause incomplete baking is solved.

2. According to the invention, by arranging the telescopic rod, the connecting plate, the first guide plate, the second guide plate and the sliding groove, the telescopic rod can drive the first guide plate and the second guide plate to slide in the sliding groove through the connecting plate, so that the positions of the first clamping rod, the second clamping rod, the third clamping rod and the fourth clamping rod can be conveniently controlled, and the fixing position of the battery cell can be conveniently adjusted.

3. According to the invention, the first guide groove, the first wedge part, the first inclined part, the second wedge part, the second inclined part and the first sliding part are arranged, the first clamping rod and the second clamping rod can slide in the first guide groove, when the first clamping rod slides on the first inclined part, the first wedge part can drive the first clamping rod to move up and down, the second clamping rod can move up and down through the second wedge part and the second inclined part, and the first sliding part can simultaneously fix the battery cell when the first clamping rod and the second clamping rod are switched, so that the battery cell is prevented from falling off when being switched.

4. According to the invention, the second guide groove, the third wedge-shaped part, the third inclined part, the fourth wedge-shaped part, the fourth inclined part and the second sliding part are arranged, the third clamping rod and the fourth clamping rod can slide in the second guide groove, the third clamping rod can slide on the third inclined part through the third wedge-shaped part, the fourth clamping rod can slide on the fourth inclined part through the fourth wedge-shaped part, and the second sliding part can simultaneously fix the battery cell when the third clamping rod and the fourth clamping rod are switched, so that the battery cell is prevented from falling off during switching.

5. According to the invention, the abutting part, the groove and the spring are arranged, the abutting part is respectively fixed on the first clamping rod, the second clamping rod, the third clamping rod and the fourth clamping rod, the groove can guide the abutting part, the spring can push the abutting part to indirectly clamp the battery cell, and the battery cell is clamped through the elasticity of the spring, so that the clamping force is small, and the battery cell is convenient to put in.

6. According to the battery cell, the soft cushion and the convex part are arranged, the soft cushion is made of high-temperature-resistant rubber, and the convex part can improve the contact stability between the soft cushion and the battery cell and prevent the battery cell from falling.

7. According to the invention, the anti-drop groove, the anti-drop part, the rotation stopping groove and the rotation stopping part are arranged, the anti-drop groove and the anti-drop part can prevent the first clamping rod, the second clamping rod, the third clamping rod and the fourth clamping rod from being separated, and the rotation stopping groove and the rotation stopping part can prevent rotation during switching, so that the clamping of the battery cell is more stable.

8. According to the invention, by arranging the spherical groove, the first ball and the second ball, the friction resistance of the first wedge part, the second wedge part, the third wedge part and the fourth wedge part during lifting can be reduced, so that the clamping position of the battery cell is more convenient to adjust.

9. According to the invention, through arranging the contact type clamp and adopting an alternate clamping mode, dead corners of the battery can be baked, excessive moisture in the battery cell is avoided, excellent performance is ensured when the lithium battery is used, and the problems that the existing battery cell is usually fixed by using the clamp and then placed in an oven for baking, and the existing clamp has a certain contact area when clamping the battery cell, the contact surface is difficult to be completely baked, the local moisture is excessive, and the local resistance is excessive in normal use are solved.

Drawings

FIG. 1 is a schematic diagram of a structure provided by an embodiment of the present invention;

FIG. 2 is a left side view provided by an embodiment of the present invention;

FIG. 3 is a cross-sectional view taken at A-A of FIG. 2 according to an embodiment of the present invention;

FIG. 4 is an enlarged view at A of FIG. 3 provided by an embodiment of the present invention;

FIG. 5 is an enlarged view at B in FIG. 3 provided by an embodiment of the present invention;

FIG. 6 is an enlarged view at C of FIG. 3 provided by an embodiment of the present invention;

FIG. 7 is an enlarged view at D in FIG. 3 according to an embodiment of the present invention

Fig. 8 is an enlarged view at E in fig. 7 according to an embodiment of the present invention.

In the figure: 1. a frame; 11. a first plate body; 12. a second plate body; 13. a third plate body; 2. a first clamping rod; 3. a second clamping rod; 4. a third clamping rod; 5. a fourth clamping rod; 61. a telescopic rod; 62. a connecting plate; 63. a first guide plate; 64. a second guide plate; 65. a chute; 661. a first guide groove; 662. a first wedge portion; 663. a first inclined portion; 664. a second wedge portion; 665. a second inclined portion; 666. a first sliding part; 671. a second guide groove; 672. a third wedge portion; 673. a third inclined portion; 674. a fourth wedge portion; 675. a fourth inclined portion; 676. a second sliding part; 681. an abutting portion; 682. a groove; 683. a spring; 71. a soft cushion; 72. a convex portion; 81. a drop-proof groove; 82. an anti-drop part; 83. a rotation stopping groove; 84. a rotation stop section; 91. a spherical groove; 92. a first ball bearing; 93. a second ball.

Detailed Description

In order to further understand the contents, features and effects of the present invention, the following embodiments are illustrated and described in detail with reference to the accompanying drawings.

The structure of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in fig. 1 to 8, an embodiment of the invention provides a baking jig for a lithium battery cell, which includes a frame 1 having a C-shaped cross section, a first clamping rod 2, a second clamping rod 3, a third clamping rod 4, a fourth clamping rod 5 symmetrically disposed on two sides of the frame 1, and a driving component for switching a cell clamping position, where the frame 1 includes a first plate 11 located above, a second plate 12 connected to one end of the first plate 11, and a third plate 13 connected to a bottom end of the second plate 12, the first clamping rod 2 and the second clamping rod 3 are slidably disposed on the first plate 11, the third clamping rod 4 and the fourth clamping rod 5 are slidably disposed on the third plate 13, when the driving component is opened, the first clamping rod 2 and the fourth clamping rod 5 contact with the battery cell, and the second clamping rod 3 and the third clamping rod 4 are separated from each other, when the driving part is closed, the second clamping rod 3 is in contact with the third clamping rod 4, and the first clamping rod 2 and the fourth clamping rod 5 are separated from the battery cell.

Adopt above-mentioned scheme: through setting up frame 1, first supporting rod 2, second supporting rod 3, third supporting rod 4, fourth supporting rod 5 and drive assembly, can switch the position of electric core centre gripping, avoid current anchor clamps to appear partly when centre gripping electric core and toast, cause to toast not complete enough problem.

Referring to fig. 1, the driving member includes a telescopic rod 61 disposed on the second plate 12, a connecting plate 62 connected to the telescopic rod 61, a first guide plate 63 connected to the upper side of the connecting plate 62, a second guide plate 64 connected to the bottom of the first guide plate 63, a sliding slot 65 for the first guide plate 63 and the second guide plate 64 to cooperate with each other, a first adjusting member for adjusting the clamping state of the first clamping rod 2 and the second clamping rod 3, a second adjusting member for adjusting the clamping state of the third clamping rod 4 and the fourth clamping rod 5, and a pressing member for keeping the cell clamped, wherein the first guide plate 63 and the second guide plate 64 move synchronously through the connecting plate 62.

Adopt above-mentioned scheme: through setting up telescopic link 61, connecting plate 62, first baffle 63, second baffle 64 and spout 65, telescopic link 61 can drive first baffle 63 and second baffle 64 through connecting plate 62 and slide in spout 65 is inside, conveniently controls the position of first supporting rod 2, second supporting rod 3, third supporting rod 4 and fourth supporting rod 5, conveniently adjusts the fixed position of electric core.

Referring to fig. 4 and 5, the first adjusting member includes a first guide groove 661 disposed on the first guide plate 63, a first wedge portion 662 disposed on the first clamping rod 2, a first inclined portion 663 disposed on the first guide plate 63 to be engaged with the first wedge portion 662, a second wedge portion 664 disposed on the second clamping rod 3, a second inclined portion 665 disposed on the first guide plate 63 to be engaged with the second wedge portion 664, and a first sliding portion 666 disposed on one side of the first inclined portion 663 and the second inclined portion 665, respectively, wherein the first wedge portion 662 and the second wedge portion 664 are symmetrically disposed, and the first inclined portion 663 and the second inclined portion 665 are symmetrically disposed.

Adopt above-mentioned scheme: through setting up first guide slot 661, first wedge portion 662, first slope 663, second wedge portion 664, second slope 665 and first portion 666 that slides, first holding rod 2 and second holding rod 3 can slide inside first guide slot 661, when first holding rod 2 slides on first slope 663, first wedge portion 662 can take first holding rod 2 to reciprocate, second holding rod 3 can pass through second wedge portion 664 and second slope 665 up-and-down motion, first portion 666 that slides can make first holding rod 2 and second holding rod 3 can fix the electric core simultaneously when switching, electric core drops when preventing to switch.

Referring to fig. 6 and 7, the second adjusting member includes a second guide groove 671 provided on the second guide plate 64, a third wedge portion 672 provided on the third clamping bar 4, a third inclined portion 673 provided on the second guide plate 64 to be engaged with the third wedge portion 672, a fourth wedge portion 674 provided on the fourth clamping bar 5, a fourth inclined portion 675 provided on the second guide plate 64 to be engaged with the fourth wedge portion 674, and second slide portions 676 provided on one side of the third inclined portion 673 and the fourth inclined portion 675, respectively, the third wedge part 672 is symmetrically disposed with the fourth wedge part 674, the third inclined part 673 is symmetrically disposed with the fourth inclined part 675, the third wedge 672 is symmetrically disposed with respect to the first wedge 662, the fourth wedge 674 is symmetrically disposed with respect to the second wedge 664, the third inclined portion 673 is disposed symmetrically to the first inclined portion 663, and the fourth inclined portion 675 is disposed symmetrically to the second inclined portion 665.

Adopt above-mentioned scheme: through the arrangement of the second guide groove 671, the third wedge-shaped portion 672, the third inclined portion 673, the fourth wedge-shaped portion 674, the fourth inclined portion 675 and the second sliding portion 676, the third clamping rod 4 and the fourth clamping rod 5 can slide inside the second guide groove 671, the third clamping rod 4 can slide on the third inclined portion 673 through the third wedge-shaped portion 672, the fourth clamping rod 5 can slide on the fourth inclined portion 675 through the fourth wedge-shaped portion 674, and the second sliding portion 676 can fix the battery cell simultaneously when the third clamping rod 4 and the fourth clamping rod 5 are switched, so that the battery cell is prevented from falling off during switching.

Referring to fig. 5, the pressing member includes an abutting portion 681 provided on the first clamping lever 2, the second clamping lever 3, the third clamping lever 4, and the fourth clamping lever 5, respectively, a groove 682 provided on the first plate 11 and the third plate 13 to be engaged with the abutting portion 681, respectively, and a spring 683 provided between the abutting portion 681 and the groove 682.

Adopt above-mentioned scheme: through setting up butt portion 681, recess 682 and spring 683, butt portion 681 is fixed respectively on first supporting rod 2, second supporting rod 3, third supporting rod 4 and fourth supporting rod 5, and recess 682 can lead butt portion 681, and spring 683 can push away butt portion 681 and press from both sides tightly electric core indirectly, and electric core carries out the centre gripping through the elasticity of spring 683 this moment, and the dynamics of its centre gripping is less, makes things convenient for putting into of electric core.

Referring to fig. 6, soft pads 71 are respectively disposed on the first clamping rod 2, the second clamping rod 3, the third clamping rod 4 and the fourth clamping rod 5, and a plurality of protrusions 72 are disposed on the soft pads 71.

Adopt above-mentioned scheme: through setting up cushion 71 and convex part 72, cushion 71 is made for high temperature resistant rubber, and convex part 72 can improve the contact stability between cushion 71 and the electric core, prevents that electric core from dropping.

Referring to fig. 5, a plurality of anti-slip grooves 81 are formed in the first plate body 11 and the second plate body 12, anti-slip portions 82 matched with the anti-slip grooves 81 are respectively formed on the first clamping rod 2, the second clamping rod 3, the third clamping rod 4 and the fourth clamping rod 5, anti-slip grooves 83 are formed in the anti-slip grooves 81, and anti-slip portions 84 matched with the anti-slip grooves 83 are formed in the anti-slip portions 82.

Adopt above-mentioned scheme: through setting up anticreep groove 81, anticreep portion 82, only groove 83 and only portion 84, anticreep groove 81 and anticreep portion 82 can prevent that first supporting rod 2, second supporting rod 3, third supporting rod 4 and fourth supporting rod 5 from breaking away from, only rotate the rotation when groove 83 and only portion 84 can prevent to switch, make the centre gripping of electric core more stable.

Referring to fig. 8, the inclined surfaces of the first, second, third and fourth wedge portions 662, 664, 672 and 674 are respectively provided with a spherical groove 91, the interior of the spherical groove 91 is provided with a first ball 92 and a second ball 93, and the first ball 92 and the second ball 93 contact.

Adopt above-mentioned scheme: through setting up spherical groove 91, first ball 92 and second ball 93, can reduce the frictional resistance when first wedge 662, second wedge 664, third wedge 672 and fourth wedge 674 go up and down, make the centre gripping position of electric core adjust more conveniently.

In addition, the invention also provides a method for baking the battery core by adopting the lithium battery core baking clamp, which comprises the following steps:

s1, placing the battery cell into a contact type clamp, and positioning and clamping;

s2, the clamp and the battery cell are conveyed into an oven, and the oven is vacuumized to less than 50Pa for less than or equal to 5 min;

s3, introducing dry gas into the oven, wherein the introducing time is less than or equal to 3 min;

s4, electrifying the clamp, heating to 80-85 ℃, and electrifying for heating time being less than or equal to 40 min;

s5, vacuumizing again to less than 50Pa for less than or equal to 5min, keeping the temperature of the clamp at 80-85 ℃ in a vacuum state, baking the battery cell for 120-150min, and vacuumizing once every 40-50min in the baking process for less than or equal to 2min each time;

s6, stopping heating after the baking time is reached, introducing dry gas into the oven for less than or equal to 5min, and taking out the battery cell;

and S7, sending the battery cell into cooling equipment, cooling the battery cell for 30 +/-5 min to ensure that the temperature of the battery cell is cooled to 45-55 ℃, and baking the battery cell.

Adopt above-mentioned scheme: can carry out a lot of stoving to electric core, can be abundant come out with the moisture separation in the electric core, can avoid electric core inside moisture too big, improve the drying efficiency of electric core.

The working principle of the invention is as follows:

when the battery cell is needed to be clamped, the battery cell is firstly placed among the first clamping rod 2, the second clamping rod 3, the third clamping rod 4 and the fourth clamping rod 5, the battery cell is clamped through the first clamping rod 2 and the fourth clamping rod 5, then the battery cell is placed in an oven to be baked, after a certain time of baking, the connecting rods are pushed to move through the telescopic rods 61, the second clamping rod 3 and the third clamping rod 4 are switched to clamp the battery cell, during the switching process, the first clamping rod 2, the second clamping rod 3, the third clamping rod 4 and the fourth clamping rod 5 can slide on the first sliding portion 666 and the second sliding portion 676, the spring 683 can apply certain pressure on the first clamping rod 2, the second clamping rod 3, the third clamping rod 4 and the fourth clamping rod 5, so that the first clamping rod 2, the second clamping rod 3, the third clamping rod 4 and the fourth clamping rod 5 can be in contact with the battery cell, avoid appearing switching the problem that in-process electricity core dropped, first supporting rod 2 and fourth supporting rod 5 break away from electric core, toast afterwards, so relapse many times, can carry out comprehensive the toasting to electric core, avoid toasting the dead angle.

In summary, the following steps: this lithium cell electricity core toasts anchor clamps and toasts method, through setting up contact anchor clamps, adopt the mode of alternative centre gripping, can toast the dead angle of battery, it is too big to avoid the inside moisture of electricity core, it has excellent performance to guarantee when the lithium cell uses, it needs anchor clamps to use usually to toast to have solved current electricity core, then toast in putting the oven, and current anchor clamps have certain area of contact when centre gripping electricity core, this contact surface is difficult to toast completely, can cause local moisture too big, normal use can produce local resistance too big.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

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