Battery restraint fixture
By designing a battery restraint fixture with an annular second clamp, the problems of pole sheet wrinkles and electrolyte are solved, and higher battery safety and cycling performance are achieved.
Patent Information
- Application Number
- CN202420959883.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-06
- Publication Date
- 2025-04-08
- Estimated Expiration
- 2034-05-06
AI Technical Summary
When existing battery restraint fixtures bind the battery, the pole sheet is prone to wrinkles or the central area of the electrolyte is poor, which affects the capacity and safety of the battery.
A battery restraint fixture is designed, including a base and a plurality of clamps, the clamps are arranged at a distance in the first direction, and at least one clamp is movable. The clamp plate includes a first clamping part and a second clamping part. The second clamping part is arranged annularly sleeved outside the first clamping part, with a hardness greater than the first clamping part, and the clamping surface is arranged to be protruding to ensure that the pressure in the center area of the pole sheet is smaller and the pressure in the edge area is larger.
It effectively avoids the problems of wrinkles in the pole sheet and the lack of electrolyte in the central area, and improves the safety and circulation performance of the battery.
Smart Images
Figure CN222726491U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of batteries, in particular to a battery restraint clamp. Background Art
[0002] As the energy density of lithium-ion batteries increases, silicon materials are increasingly used in negative electrodes. Since the volume of silicon materials expands greatly during the charge and discharge process, the pole pieces are prone to wrinkles when the battery is formed and divided in a free state, affecting the capacity and safety of the battery. Therefore, when the battery is formed and divided in a free state, it is often necessary to use a restraint fixture to restrain the battery.
[0003] At present, the restraint clamp includes multiple clamps, and the battery is placed between two adjacent clamps. The clamps are used to clamp the battery to achieve the restraint of the battery. When the clamps clamp the battery, the clamps are in contact with the large surface of the battery, so that the large surface of the battery is subjected to uniform pressure from the clamps. When the pressure on the large surface of the battery is small, the restraint clamp cannot effectively restrain the battery, resulting in the electrode being prone to wrinkles; when the pressure on the large surface of the battery is large, the central area of the electrode is difficult to be infiltrated by the electrolyte, and the electrolyte in the central area of the electrode is easily squeezed out, resulting in the problem of electrolyte poverty in the central area of the electrode, affecting the cycle performance of the battery. Therefore, how to avoid the problem of electrolyte poverty in the central area of the electrode while avoiding the wrinkles of the electrode is a problem that needs to be solved urgently. Utility Model Content
[0004] To this end, the utility model proposes a battery restraint clamp to prevent the pole piece from wrinkling and avoid the problem of electrolyte deficiency in the central area of the pole piece.
[0005] The battery restraint clamp of the utility model comprises a base and a plurality of clamps, wherein the plurality of clamps are arranged at intervals along a first direction and connected to the base, and at least one of the clamps is movable along the first direction; the clamp comprises a first clamping portion and a second clamping portion, wherein the second clamping portion is annular and sleeved on the outer side of the first clamping portion, the first clamping portion has a first clamping surface, and the second clamping portion has a second clamping surface; wherein the hardness of the second clamping portion is greater than that of the first clamping portion, and / or the second clamping surface is arranged to protrude from the first clamping surface; and the first direction is parallel to the thickness direction of the clamp.
[0006] Optionally, the outer side surface of the first clamping portion is chamfered; and / or the inner side surface and / or the outer side surface of the second clamping portion is chamfered.
[0007] Optionally, the chamfer is a rounded corner.
[0008] Optionally, the clamp includes a substrate and a protrusion, the substrate is connected to the base, the protrusion is arranged on at least one side of the substrate in the first direction and connected to the substrate, and the first clamping portion and the second clamping portion are both arranged on the protrusion.
[0009] Optionally, the bump is detachably connected to the substrate.
[0010] Optionally, the clamping plate further comprises a limiting block, the limiting block protrudes out of the convex block arrangement in the first direction and is connected to the base plate, and a surface of the limiting block facing away from the clamping plate forms a first limiting surface.
[0011] Optionally, the limit blocks are arranged on opposite sides of the protrusion in a second direction; wherein the second direction is perpendicular to the thickness direction of the splint and perpendicular to the first direction.
[0012] Optionally, a second limiting surface is formed on the surface of the limiting block facing the protrusion.
[0013] Optionally, the hardness difference between the second clamping portion and the first clamping portion is less than or equal to 50HD; and / or, the distance between the first clamping surface and the second clamping surface in the first direction is 0.3 mm to 1 mm.
[0014] Optionally, the outer side surface of the first clamping portion is in contact with the inner side surface of the second clamping portion; and / or at least one of the first clamping portion and the second clamping portion is an elastic clamping portion.
[0015] When the battery restraint clamp of the utility model is used, the battery is placed on the base and located between the two clamping plates. The clamping plates are moved along the first direction so that the battery is clamped between the two clamping plates, that is, the first clamping surface of the first clamping part and the second clamping surface of the second clamping part are both clamped on the surface of the battery, so as to realize the restraint of the battery. By setting the second clamping part to be annular and sleeved on the outside of the first clamping part, the first clamping part can clamp the central area of the battery, and the second clamping part can clamp the edge area of the battery. By setting the hardness of the second clamping part to be greater than the hardness of the first clamping part, when the first clamping part and the second clamping part are both clamped on the surface of the battery, the first clamping part can be deformed, so that the pressure applied by the first clamping part to the battery is less than the pressure applied by the second clamping part to the battery, so that not only the pressure on the central area of the pole piece is smaller, so as to avoid the problem of electrolyte deficiency in the central area of the pole piece; but also the pressure on the edge area of the pole piece is larger, so as to avoid wrinkles on the pole piece. By setting the second clamping surface protruding from the first clamping surface, when the first clamping part and the second clamping part are both clamped on the surface of the battery, the pressure applied by the first clamping part to the battery is less than the pressure applied by the second clamping part to the battery, so that not only the pressure on the central area of the pole piece is smaller to avoid the problem of electrolyte deficiency in the central area of the pole piece, but also the pressure on the edge area of the pole piece is larger to avoid wrinkling of the pole piece. In this way, the problem of electrolyte deficiency in the central area of the pole piece can be avoided while avoiding wrinkling of the pole piece, thereby improving the safety and cycle performance of the battery. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 The utility model is a three-dimensional diagram of a battery restraint clamp after clamping a battery.
[0017] Figure 2 The utility model is a top view of a battery restraint clamp after clamping a battery.
[0018] Figure 3 The utility model is a partial structural schematic diagram of a battery restraint clamp before clamping a battery.
[0019] Figure 4 It is a three-dimensional diagram of a clamping plate in a battery restraint clamp according to an embodiment of the utility model.
[0020] Figure 5 It is a front view of a clamping plate in a battery restraint clamp according to an embodiment of the utility model.
[0021] Figure 6 yes Figure 5 AA view.
[0022] Figure 7 yes Figure 6 Enlarged view of point B in the middle.
[0023] Figure 8 It is a left side view of a clamping plate in a battery restraint clamp according to an embodiment of the utility model.
[0024] Fig. 9 It is a rear view of a clamping plate in a battery restraint clamp according to an embodiment of the utility model.
[0025] Fig.10 The figure is a positional relationship diagram of a battery and a protrusion after a battery restraint clamp of an embodiment of the utility model clamps a battery.
[0026] Reference numerals:
[0027] 10. Battery restraint fixture;
[0028] 1. Base;
[0029] 2. Clamping plate; 21. First clamping part; 211. First clamping surface; 22. Second clamping part; 221. Second clamping surface; 23. Third clamping part; 231. Third clamping surface; 24. Single-sided clamping plate; 25. Double-sided clamping plate; 201. Base plate; 202. Protrusion; 2021. Chamfer; 203. Connecting plate; 204. Limiting block; 2041. First limiting surface; 2042. Second limiting surface; 205. Supporting plate; 2051. Bearing surface;
[0030] 3. Guide rod;
[0031] 4. Mounting plate;
[0032] 5. Driving mechanism;
[0033] 20. Battery; 2001. Large battery surface. DETAILED DESCRIPTION
[0034] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but cannot be understood as limiting the present invention.
[0035] like Figures 1 to 9 As shown, the battery restraint clamp 10 of the embodiment of the utility model includes a base 1 and a plurality of clamps 2, the plurality of clamps 2 are arranged at intervals along a first direction and connected to the base 1, and at least one clamp 2 is movable along the first direction. The clamp 2 includes a first clamping portion 21 and a second clamping portion 22, the second clamping portion 22 is annular and is sleeved on the outside of the first clamping portion 21, the first clamping portion 21 has a first clamping surface 211, and the second clamping portion 22 has a second clamping surface 221. The hardness of the second clamping portion 22 is greater than the hardness of the first clamping portion 21, and / or the second clamping surface 221 is protruding from the first clamping surface 211. The first direction is parallel to the thickness direction of the clamp 2.
[0036] Among them, the hardness of the second clamping portion 22 is greater than the hardness of the first clamping portion 21, and / or the second clamping surface 221 protrudes from the first clamping surface 211, which can be understood as: the hardness of the second clamping portion 22 is greater than the hardness of the first clamping portion 21, and the second clamping surface 221 is flush with the first clamping surface 211; or, the hardness of the second clamping portion 22 is equal to the hardness of the first clamping portion 21, and the second clamping surface 221 protrudes from the first clamping surface 211; or, the hardness of the second clamping portion 22 is greater than the hardness of the first clamping portion 21, and the second clamping surface 221 protrudes from the first clamping surface 211.
[0037] At least one clamping plate 2 is movable along the first direction, which can be understood as: multiple clamping plates 2 are movable along the first direction; or, some of the clamping plates 2 are movable along the first direction, and other clamping plates 2 cannot move along the first direction.
[0038] Outward can be understood as: on a plane perpendicular to the thickness direction of the clamping plate 2, the direction away from the center line of the clamping plate 2; inward can be understood as: on a plane perpendicular to the thickness direction of the clamping plate 2, the direction close to the center line of the clamping plate 2. The outer side of the second clamping portion 22 is farther away from the first clamping portion 21 than the inner side of the second clamping portion 22.
[0039] like Figure 1 and Figure 3 As shown, when the battery restraint clamp 10 of the embodiment of the utility model is used, the battery 20 is placed on the base 1 and located between the two clamping plates 2. The clamping plates 2 are moved along the first direction so that the battery 20 is clamped between the two clamping plates 2, that is, the first clamping surface 211 of the first clamping portion 21 and the second clamping surface 221 of the second clamping portion 22 are clamped on the surface of the battery 20, thereby restraining the battery 20. By setting the second clamping portion 22 in an annular shape and sleeved on the outside of the first clamping portion 21, the first clamping portion 21 can clamp the central area of the battery 20, and the second clamping portion 22 can clamp the edge area of the battery 20.
[0040] By setting the hardness of the second clamping portion 22 to be greater than the hardness of the first clamping portion 21, when the first clamping portion 21 and the second clamping portion 22 are both clamped on the surface of the battery 20, the first clamping portion 21 can be deformed so that the pressure applied by the first clamping portion 21 to the battery 20 is less than the pressure applied by the second clamping portion 22 to the battery 20, so that not only the pressure on the central area of the pole piece is smaller, so as to avoid the problem of electrolyte deficiency in the central area of the pole piece; but also the pressure on the edge area of the pole piece is greater, so as to avoid wrinkles on the pole piece. By setting the second clamping surface 221 protruding from the first clamping surface 211, when the first clamping portion 21 and the second clamping portion 22 are both clamped on the surface of the battery 20, the pressure applied by the first clamping portion 21 to the battery 20 is less than the pressure applied by the second clamping portion 22 to the battery 20, so that not only the pressure on the central area of the pole piece is smaller, so as to avoid the problem of electrolyte deficiency in the central area of the pole piece; but also the pressure on the edge area of the pole piece is greater, so as to avoid wrinkles on the pole piece. In this way, the problem of electrolyte deficiency in the central area of the electrode sheet can be avoided while avoiding wrinkles on the electrode sheet, thereby improving the safety and cycle performance of the battery 20.
[0041] In some embodiments, Figure 3 , Figure 4 , Figure 5 and Fig. 9 As shown, the clamping plate 2 includes a substrate 201 and a protrusion 202 . The substrate 201 is connected to the base 1 . The protrusion 202 is arranged on at least one side of the substrate 201 in the first direction and connected to the substrate 201 . The first clamping portion 21 and the second clamping portion 22 are both arranged on the protrusion 202 .
[0042] The bump 202 is disposed on at least one side of the substrate 201 in the first direction, which can be understood as: the bump 202 is disposed on one side of the substrate 201 in the first direction; or, the bump 202 is disposed on two opposite sides of the substrate 201 in the first direction. In other words, the bump 202 is disposed on one side of the substrate 201 in the thickness direction, or, the bump 202 is disposed on both sides of the substrate 201 in the thickness direction.
[0043] It is understandable that since the first clamping portion 21 and the second clamping portion 22 need to contact the surface of the battery 20 and be clamped on the surface of the battery 20, this places higher requirements on the processing accuracy and material of the first clamping surface 211 and the second clamping surface 221. By setting the clamping plate 2 to include the substrate 201 and the protrusion 202, and setting the first clamping portion 21 and the second clamping portion 22 on the protrusion 202, it is sufficient to only make the processing accuracy and material of the protrusion 202 meet the requirements, and the processing accuracy and material requirements of the substrate 201 connected to the base 1 can be lower. In this way, the cost of the clamping plate 2 can be reduced, thereby reducing the cost of the battery restraint clamp 10.
[0044] Of course, in other embodiments, the entire splint 2 may be configured to be plate-shaped, with a portion of the splint 2 forming the first clamping portion 21 , a portion of the splint 2 forming the second clamping portion 22 , and the rest of the splint 2 connected to the base 1 .
[0045] like Figure 2 and Figure 3 As shown, the number of the clamps 2 is at least three, of which two clamps 2 are single-sided clamps 24, and the remaining clamps 2 are double-sided clamps 25, and the double-sided clamps 25 are arranged between the two single-sided clamps 24 in the first direction. At least one single-sided clamp 24 and all double-sided clamps 25 can move along the first direction. Among them, in the single-sided clamp 24, the protrusion 202 is arranged on one side of the substrate 201 in the first direction, and the single-sided clamp 24 can only clamp the battery 20 located on one side thereof; in the double-sided clamp 25, the protrusion 202 is arranged on the opposite sides of the substrate 201 in the first direction, and the double-sided clamp 25 can clamp the battery 20 located on both sides thereof.
[0046] like Figure 2 and Figure 3 As shown, the battery restraint clamp 10 also includes a mounting plate 4, a guide rod 3 and a driving mechanism 5. The mounting plate 4 is connected to the base 1, one end of the guide rod 3 is connected to the mounting plate 4, and the driving mechanism 5 is connected to the mounting plate 4. The two single-sided clamps 24 are respectively a first clamp and a second clamp. The second clamp is arranged between the first clamp and the mounting plate 4 in the first direction. The first clamp is connected to the base 1, and the other end of the guide rod 3 is connected to the first clamp. The guide rod 3 passes through the second clamp and the double-sided clamp 25, and the second clamp and the double-sided clamp 25 are both slidably matched with the guide rod 3. The driving mechanism 5 is used to drive the second clamp to move along the first direction.
[0047] When the driving mechanism 5 drives the second clamping plate to move in the direction toward the first clamping plate, the second clamping plate can push the double-sided clamping plate 25 to move in the direction toward the first clamping plate to achieve the clamping of the battery 20; when the driving mechanism 5 drives the second clamping plate to move in the direction away from the first clamping plate, the clamping effect on the battery 20 can be released.
[0048] In order to make the technical solution of the present invention easier to understand, the following takes the first direction being consistent with the front-to-back direction as an example to further describe the technical solution of the present invention. Figures 1 to 8 shown.
[0049] like Figures 1 to 3As shown, a plurality of clamps 2 are arranged at intervals along the front-to-back direction. The mounting plate 4 is connected to the front end of the base 1, and the double-sided clamp 25 is arranged between the two single-sided clamps 24 in the front-to-back direction. The single-sided clamp 24 (second clamp) located at the front side has a protrusion 202 arranged on the rear side of the substrate 201, so that the single-sided clamp 24 can clamp the battery 20 backward; the single-sided clamp 24 (first clamp) located at the rear side has a protrusion 202 arranged on the front side of the substrate 201, so that the single-sided clamp 24 can clamp the battery 20 forward. In the double-sided clamp 25, the protrusion 202 is arranged on the front and rear sides of the substrate 201, so that the double-sided clamp 25 can clamp the batteries 20 located on the front and rear sides thereof.
[0050] When the battery restraint fixture 10 is in use, first, the battery 20 is placed between the two adjacent front and rear clamps 2; then, the driving mechanism 5 drives the single-sided clamp 24 located on the front side to move backward; thereafter, the single-sided clamp 24 located on the front side is used to push the double-sided clamp 25 to move backward until each battery 20 is clamped between two adjacent clamps 2, and the battery restraint fixture 10 is used to restrain multiple batteries 20. After the formation process of the battery 20 is completed, when the battery 20 needs to be taken out, the driving mechanism 5 drives the single-sided clamp 24 located on the front side to move forward, so that the clamping effect of the clamp 2 on the battery 20 is released, and the battery 20 can be taken out of the battery restraint fixture 10.
[0051] Optionally, the base 1 is plate-shaped.
[0052] For example, the thickness direction of the base 1 is consistent with the up-down direction, and the clamping plate 2 is arranged on the upper side of the base 1. Figure 1 , Figure 3 , Figure 4 , Figure 5 , Figure 8 and Fig. 9 shown.
[0053] Optionally, the bump 202 is detachably connected to the substrate 201 .
[0054] For example, the bump 202 is connected to the substrate 201 by bolts or screws.
[0055] By setting the protrusion 202 to be detachably connected to the substrate 201 , the protrusion 202 can be replaced, so that the battery restraint clamp 10 can be used to clamp batteries 20 of different sizes, thereby improving the versatility of the battery restraint clamp 10 .
[0056] Of course, in some other embodiments, the bump 202 and the substrate 201 may also be fixedly connected, for example, the bump 202 and the substrate 201 are welded or bonded.
[0057] Alternatively, if Figures 3 to 9As shown, the clamping plate 2 further includes a connecting plate 203, the protrusion 202 is connected to the connecting plate 203, and the connecting plate 203 is detachably connected to the base plate 201. The protrusion 202 and the connecting plate 203 can be bonded.
[0058] For example, the connecting plate 203 is provided with a connecting hole, the base plate 201 is provided with a threaded hole, and the screw passes through the connecting hole and is connected with the threaded hole, so as to realize the connection between the protrusion 202 and the base plate 201 .
[0059] In some embodiments, Figures 3 to 5 As shown, the clamping plate 2 further includes a stopper 204, which protrudes from the protrusion 202 in the first direction and is connected to the base plate 201. The surface of the stopper 204 facing away from the clamping plate 2 forms a first stopper surface 2041. The stopper 204 and the base plate 201 can be welded or bonded.
[0060] By setting the limit block 204, when the battery 20 is clamped between the two clamps 2, the first limit surface 2041 of the limit block 204 stops at the other clamp 2 to limit the distance between the two adjacent clamps 2, thereby limiting the pressure applied by the clamp 2 to the battery 20, avoiding the battery 20 from being damaged due to the greater pressure, and improving the reliability of the battery restraint clamp 10.
[0061] Alternatively, if Figures 3 to 6 As shown, the limiting blocks 204 are arranged on opposite sides of the protrusion 202 in the second direction. The second direction is perpendicular to the thickness direction of the clamping plate 2 and perpendicular to the first direction.
[0062] By arranging the limit blocks 204 on the opposite sides of the protrusion 202 in the second direction, when the battery 20 is clamped between the two clamps 2, the limit blocks 204 located on both sides of the protrusion 202 both stop at the other clamp 2, so as to prevent one of the clamps 2 from tilting relative to the other clamp 2, causing the battery 20 to be damaged due to uneven force on both sides of the second direction, thereby further improving the reliability of the battery restraint clamp 10.
[0063] Alternatively, if Figure 4 and Figure 6 As shown, the surface of the limiting block 204 facing the protrusion 202 forms a second limiting surface 2042 .
[0064] The limiting blocks 204 disposed on opposite sides of the protrusion 202 in the second direction are respectively the first limiting block and the second limiting block. When the battery restraining fixture 10 is in use, the battery 20 is placed between the first limiting block and the second limiting block.
[0065] By using the surface of the limit block 204 facing the protrusion 202 as the second limit surface 2042, when the battery 20 is placed between the first limit block and the second limit block, the second limit surface 2042 of the first limit block and the second limit block can be used to limit the position of the battery 20 in the second direction so that the center area of the battery 20 is aligned with the first clamping portion 21, thereby further improving the reliability of the battery restraint clamp 10.
[0066] In order to make the technical solution of the present invention easier to understand, the following takes the second direction being consistent with the left-right direction as an example to further describe the technical solution of the present invention. Figures 1 to 7 , Fig. 9 shown.
[0067] For example, Figures 4 to 7 As shown, the limit blocks 204 are arranged on the left and right sides of the protrusion 202 in the left-right direction, that is, the limit blocks 204 are arranged on the left and right sides of the protrusion 202. By arranging the limit blocks 204 on the left and right sides of the protrusion 202, when the clamping plate 2 clamps the battery 20 in the front-to-back direction, not only can the clamping plate 2 be prevented from tilting in the front-to-back direction, but the battery 20 can also be limited in the left-to-right direction, so that the central area of the battery 20 is aligned with the first clamping portion 21 in the left-to-right direction.
[0068] Alternatively, if Figures 4 to 6 As shown, the clamping plate 2 further includes a supporting plate 205, and the supporting plate 205 is provided with a supporting surface 2051 for supporting the battery 20. The supporting plate 205 and the base plate 201 can be welded or bonded.
[0069] For example, in the second direction, two ends of the supporting plate 205 are respectively connected to the two limiting blocks 204 .
[0070] When the battery restraint fixture 10 is in use, the battery 20 is placed on the supporting plate 205 , and the supporting surface 2051 is in contact with the bottom surface of the battery 20 , so that the supporting plate 205 supports the battery 20 .
[0071] By arranging the supporting plate 205 on the clamping plate 2 , the battery 20 can move with the clamping plate 2 , thereby preventing the battery 20 from moving relative to the substrate 201 and causing friction and wear between the substrate 201 .
[0072] Optionally, a chamfer 2021 is provided on the outer side surface of the first clamping portion 21 .
[0073] By providing a chamfer on the outer side surface of the first clamping portion 21 , it is possible to avoid an indentation on the surface of the battery 20 when the first clamping surface 211 is clamped on the surface of the battery 20 , thereby improving the performance of the battery 20 .
[0074] Optionally, the inner side surface and / or the outer side surface of the second clamping portion 22 is provided with a chamfer 2021. In other words, the inner side surface of the second clamping portion 22 is provided with a chamfer 2021, and the outer side surface of the second clamping portion 22 is not provided with a chamfer; or, the inner side surface of the second clamping portion 22 is not provided with a chamfer 2021, and the outer side surface of the second clamping portion 22 is provided with a chamfer; or, the inner side surface of the second clamping portion 22 is provided with a chamfer 2021, and the outer side surface of the second clamping portion 22 is provided with a chamfer 2021.
[0075] By providing chamfers on the inner and / or outer sides of the second clamping portion 22 , it is possible to avoid indentations on the surface of the battery 20 when the second clamping surface 221 is clamped on the surface of the battery 20 , thereby improving the performance of the battery 20 .
[0076] In some embodiments, Figure 5 and Fig. 9 As shown, the clamping plate 2 further includes a third clamping portion 23, which is annular and sleeved on the outer side of the second clamping portion 22, and has a third clamping surface 231. The hardness of the third clamping portion 23 is greater than the hardness of the second clamping portion 22, and / or the third clamping surface 231 is protruding from the second clamping surface 221.
[0077] By providing the third clamping part 23 on the clamping plate 2, and the third clamping part 23 is sleeved on the outside of the second clamping part 22, the clamping plate 2 includes at least the first clamping part 21, the second clamping part 22 and the third clamping part 23 which are nested with each other, so that the hardness of the first clamping part 21, the second clamping part 22 and the third clamping part 23, as well as the height difference of the first clamping surface 211, the second clamping surface 221 and the third clamping surface 231 can be designed according to the requirements, so that when the clamping plate 2 clamps the battery 20, the pressure on the battery 20 is divided into at least three gradients from the center to the outside. This can more effectively avoid the occurrence of wrinkles on the pole piece and avoid the problem of electrolyte deficiency in the central area of the pole piece.
[0078] Optionally, the inner side surface and / or the outer side surface of the third clamping portion 23 is provided with a chamfer 2021 .
[0079] In other words, the inner side surface of the third clamping portion 23 is provided with a chamfer 2021, and the outer side surface of the third clamping portion 23 is not provided with a chamfer; or, the inner side surface of the third clamping portion 23 is not provided with a chamfer 2021, and the outer side surface of the third clamping portion 23 is provided with a chamfer; or, the inner side surface of the third clamping portion 23 is provided with a chamfer 2021, and the outer side surface of the third clamping portion 23 is provided with a chamfer 2021.
[0080] By providing chamfers on the inner and / or outer sides of the third clamping portion 23 , it is possible to avoid indentations on the surface of the battery 20 when the third clamping surface 231 is clamped on the surface of the battery 20 , thereby improving the performance of the battery 20 .
[0081] like Figure 7 As shown, chamfer 2021 is a rounded corner.
[0082] By setting the chamfer 2021 as a rounded corner, it is possible to more effectively avoid further avoiding the generation of indentations on the surface of the battery 20 , thereby improving the performance of the battery 20 .
[0083] Optionally, the hardness difference between the second clamping portion 22 and the first clamping portion 21 is less than or equal to 50 HD.
[0084] It is understandable that when the hardness difference between the second clamping portion 22 and the first clamping portion 21 is large, when the clamping plate 2 clamps the battery 20 , the first clamping portion 21 is deformed greatly, which may easily cause indentations on the surface of the battery 20 .
[0085] By setting the hardness difference between the second clamping portion 22 and the first clamping portion 21 to be less than or equal to 50HD, a large hardness difference between the second clamping portion 22 and the first clamping portion 21 can be avoided, thereby avoiding indentations on the surface of the battery 20 and further improving the performance of the battery 20.
[0086] Optionally, the hardness difference between the third clamping portion 23 and the second clamping portion 22 is less than or equal to 60 HD.
[0087] By setting the hardness difference between the third clamping portion 23 and the second clamping portion 22 to be less than or equal to 60HD, a large hardness difference between the third clamping portion 23 and the second clamping portion 22 can be avoided, thereby avoiding indentations on the surface of the battery 20 and further improving the performance of the battery 20.
[0088] Optionally, the hardness of the first clamping portion 21 is 20HD to 40HD, the hardness of the second clamping portion 22 is 40HD to 70HD, and the hardness of the third clamping portion 23 is 70HD to 100HD.
[0089] Optionally, the first clamping portion 21 is an elastic clamping portion.
[0090] The elastic clamping part may be understood as a material of the clamping part being an elastic material.
[0091] By setting the first clamping portion 21 as an elastic clamping portion, when the clamp 2 clamps the battery 2, the deformation of the first clamping portion 21 is elastic deformation. When the clamp 2 releases the clamping effect on the battery 20, the first clamping portion 21 can be elastically reset so as to be repeatedly used to clamp the battery 20, so that the battery restraint clamp 10 can be reused many times.
[0092] Optionally, the second clamping portion 22 is an elastic clamping portion.
[0093] By setting the second clamping portion 22 as an elastic clamping portion, when the clamping plate 2 releases the clamping effect on the battery 20, the second clamping portion 22 can be elastically reset, so that the battery restraining clamp 10 can be reused multiple times.
[0094] Optionally, the third clamping portion 23 is an elastic clamping portion.
[0095] By setting the third clamping portion 23 as an elastic clamping portion, when the clamping plate 2 releases the clamping effect on the battery 20, the third clamping portion 23 can be elastically reset, so that the battery restraining clamp 10 can be reused multiple times.
[0096] Optionally, the first clamping portion 21, the second clamping portion 22 and the third clamping portion 23 may be made of elastic materials such as polyurethane and silicone. When specifically designed, the hardness of the polyurethane and silicone may be adjusted according to requirements.
[0097] Optionally, the third clamping portion 23 is made of a rigid material such as glass fiber, Sisteel, etc.
[0098] Optionally, the outer side surface of the first clamping portion 21 fits with the inner side surface of the second clamping portion 22 .
[0099] By fitting the outer side surface of the first clamping portion 21 with the inner side surface of the second clamping portion 22 , a gap between the first clamping portion 21 and the second clamping portion 22 can be avoided, so as to avoid the gap causing an indentation on the surface of the battery 20 when the clamping plate 2 clamps the battery 20 .
[0100] Optionally, the outer side surface of the second clamping portion 22 fits with the inner side surface of the third clamping portion 23 .
[0101] By fitting the outer side surface of the second clamping portion 22 with the inner side surface of the third clamping portion 23 , a gap between the second clamping portion 22 and the third clamping portion 23 can be avoided, so as to avoid the gap causing an indentation on the surface of the battery 20 when the clamping plate 2 clamps the battery 20 .
[0102] Optionally, the first clamping portion 21 is bonded to the second clamping portion 22 .
[0103] Optionally, the second clamping portion 22 is bonded to the third clamping portion 23 .
[0104] Optionally, the distance between the first clamping surface 211 and the second clamping surface 221 in the first direction is 0.3 mm to 1 mm. In other words, the distance between the first clamping surface 211 and the second clamping surface 221 in the front-to-back direction is 0.3 mm to 1 mm.
[0105] It is understandable that when the distance between the first clamping surface 211 and the second clamping surface 221 in the first direction is large, when the clamping plate 2 clamps the battery 20 , it is easy to cause an indentation on the surface of the battery 20 .
[0106] By setting the distance between the first clamping surface 211 and the second clamping surface 221 in the first direction to 0.3 mm to 1 mm, it is possible to avoid indentations on the surface of the battery 20 , thereby further improving the performance of the battery 20 .
[0107] Optionally, the distance between the second clamping surface 221 and the third clamping surface 231 in the first direction is 0.3 mm to 1 mm. In other words, the distance between the second clamping surface 221 and the third clamping surface 231 in the front-to-back direction is 0.3 mm to 1 mm.
[0108] By setting the distance between the second clamping surface 221 and the third clamping surface 231 in the first direction to 0.3 mm to 1 mm, it is possible to avoid indentations on the surface of the battery 20 , thereby further improving the performance of the battery 20 .
[0109] like Figure 3 As shown, the battery 20 includes a large battery surface 2001 , and the clamping plate 2 is used to clamp the large battery surface 2001 .
[0110] like Fig.10 As shown, the battery large surface 2001 is rectangular, the width of the battery large surface 2001 is a, and the length of the battery large surface 2001 is b. The first clamping surface 211 is rectangular, the second clamping surface 221 and the third clamping surface 231 are both annular, the length b1 of the first clamping surface 211 is (0.3-0.6) b, and the width a1 is (0.30-0.55) a; the length b2 of the second clamping surface 221 is (0.55-0.7) b, and the width a2 is (0.50-0.70) a; the length b3 of the third clamping surface 231 is (0.7-0.95) b, and the width a3 is (0.55-0.85) a.
[0111] By designing the dimensions of the battery large surface 2001, the first clamping surface 211, the second clamping surface 221 and the third clamping surface 231 as described above, the pressure on the central area of the pole piece is small, so as to avoid the problem of electrolyte deficiency in the central area of the pole piece; the pressure on the edge area of the pole piece is large, so as to avoid the pole piece from wrinkling; and the pressure on the area between the center and the edge area of the pole piece is arranged to be neither too large nor too small. While avoiding the problem of electrolyte deficiency in various areas of the pole piece from wrinkling, the safety and cycle performance of the battery 20 can be more effectively improved.
[0112] The battery restraint clamp 10 of the embodiment of the utility model is provided with a plurality of clamping parts, and the plurality of clamping parts are gradient-designed. Specifically, the hardness of the clamping part located on the outside is set to be greater than the hardness of the clamping part located on the inside, and the clamping surface height of the clamping part located on the outside is set to be higher than the clamping surface height of the clamping part located on the inside. When the battery 20 is charged and expanded, the central area of the pole piece can have a certain compression space, which can ensure that the edge area of the pole piece is not wrinkled under pressure, and does not affect the infiltration of the central area of the pole piece, thereby improving the performance of the battery 20.
[0113] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are illustrative and cannot be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.
Claims
1. A battery restraint fixture, characterized in that: include: Pedestal; A plurality of clamping plates, the plurality of clamping plates are arranged at intervals along a first direction and connected to the base, and at least one of the clamping plates is movable along the first direction; The clamping plate comprises a first clamping portion and a second clamping portion, the second clamping portion is annular and sleeved on the outer side of the first clamping portion, the first clamping portion has a first clamping surface, and the second clamping portion has a second clamping surface; The hardness of the second clamping portion is greater than that of the first clamping portion, and / or the second clamping surface is arranged to protrude from the first clamping surface; and the first direction is parallel to the thickness direction of the clamping plate.
2. The battery restraint fixture according to claim 1, characterized in that: The outer side surface of the first clamping portion is chamfered; and / or An inner side surface and / or an outer side surface of the second clamping portion is provided with a chamfer.
3. The battery restraint fixture according to claim 2, characterized in that: The chamfer is a rounded corner.
4. The battery restraint fixture according to claim 1, characterized in that: The clamping plate includes a substrate and a protrusion, wherein the substrate is connected to the base, the protrusion is arranged on at least one side of the substrate in the first direction and connected to the substrate, and the first clamping portion and the second clamping portion are both arranged on the protrusion.
5. The battery restraint fixture according to claim 4, characterized in that: The bump is detachably connected to the substrate.
6. The battery restraint fixture according to claim 4, characterized in that: The clamping plate further comprises a limiting block, which is protruding from the protrusion in the first direction and connected to the base plate, and a surface of the limiting block facing away from the clamping plate forms a first limiting surface.
7. The battery restraint fixture according to claim 6, characterized in that: The limiting blocks are arranged on two opposite sides of the protrusion in the second direction; The second direction is perpendicular to the thickness direction of the splint and perpendicular to the first direction.
8. The battery restraint fixture according to claim 7, characterized in that: The surface of the limiting block facing the protruding block forms a second limiting surface.
9. The battery restraint clamp according to any one of claims 1 to 7, characterized in that: The hardness difference between the second clamping portion and the first clamping portion is less than or equal to 50HD; and / or The distance between the first clamping surface and the second clamping surface in the first direction is 0.3 mm to 1 mm.
10. The battery restraint clamp according to any one of claims 1 to 7, characterized in that: The outer side surface of the first clamping portion is in contact with the inner side surface of the second clamping portion; and / or At least one of the first clamping portion and the second clamping portion is an elastic clamping portion.