Connecting piece and battery

Abstract

The utility model relates to the technical field of batteries, and discloses a connecting piece and a battery. The second welding area and the first welding area are arranged at an interval; the connecting section is fixedly connected between the first welding area and the second welding area, a reinforcing rib is arranged on the connecting section, the extending direction of the reinforcing rib is perpendicular to the extending direction of the connecting section, the thickness t of a body of the connecting section and the thickness t1 of the reinforcing rib meet the relational expression that t1 / t is larger than or equal to 0.2 and smaller than or equal to 0.8. The reinforcing ribs are arranged on the connecting sections, the structural strength of the connecting sections is improved, the bending resistance of the connecting pieces is improved, the connecting pieces are prevented from being broken, the ratio of the thickness of the reinforcing ribs to the body thickness of the connecting sections ranges from 0.2 to 0.8, it is guaranteed that the reinforcing ribs provide enough reinforcing effect for the connecting pieces, and the connecting pieces are prevented from being broken. The risk that the connecting piece is broken is reduced, it is guaranteed that the connecting piece can be bent smoothly, and the connecting piece is prevented from being too heavy.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a connecting piece and a battery. Background Art

[0002] A battery mainly consists of a housing, a cover plate and a pole group, etc. Among them, the pole group is located inside the housing, and the cover plate is arranged at the opening end of the housing to seal the housing. A pole post is arranged on the cover plate, and a connecting piece is arranged between the cover plate and the pole group. One side part of the connecting piece is used for welding with the pole ear on the battery pole group, and the other side part is used for welding with the pole post to realize the electrical connection between the pole group and the pole post. The connecting piece is located between the cover plate and the pole group. During assembly, the connecting piece usually needs to be bent at the middle part. However, since the connecting piece needs to be welded with the pole ear, the material hardness of the connecting piece is usually relatively soft, and there is a risk of breakage at the bent part formed after bending, resulting in unqualified batteries and posing a great potential safety hazard. Summary of the Utility Model

[0003] In view of this, the utility model provides a connecting piece and a battery to solve the problem that the connecting piece has a risk of breakage.

[0004] In the first aspect, the utility model provides a connecting piece, including: a first welding area; a second welding area spaced from the first welding area; a connecting section fixedly connected between the first welding area and the second welding area. A reinforcing rib is arranged on the connecting section, and the extending direction of the reinforcing rib is perpendicular to the extending direction of the connecting section. The body thickness of the connecting section is t, and the thickness of the reinforcing rib is t1, satisfying the relational expression: 0.2 ≤ t1 / t ≤ 0.8.

[0005] Beneficial effects: By arranging a reinforcing rib on the connecting section between the first welding area and the second welding area of the connecting piece, when the connecting piece is bent during use, the crease coincides with the reinforcing rib, and the reinforcing rib increases the structural strength of the bent area of the connecting section, thereby improving the anti-bending ability of the connecting piece, avoiding the connecting piece from being broken, and thus improving the overall safety of the battery. Moreover, by setting the ratio of the thickness t1 of the reinforcing rib to the body thickness t of the connecting section to take values within the range of 0.2 to 0.8, it can not only ensure that the reinforcing rib provides sufficient strengthening effect for the strength of the connecting piece, reduce the risk of the connecting piece being broken during bending, but also ensure that the connecting piece can be bent smoothly and avoid the connecting piece from being too heavy, thereby reducing the cost as much as possible.

[0006] In an optional embodiment, the value range of the thickness t1 of the reinforcing rib is: 0.1 mm ≤ t1 ≤ 1 mm.

[0007] Beneficial effects: By setting the thickness t1 of the reinforcing rib to be within the range of 0.1 mm to 1 mm, it can not only ensure that the reinforcing rib can provide sufficient strengthening effect for the connecting piece, improve the anti-bending ability of the connecting piece, avoid the connecting piece from being broken, but also ensure the stability of the connecting piece, ensure the smooth bending of the connecting piece, and avoid the excessive weight of the connecting piece.

[0008] In an alternative embodiment, the width of the reinforcing rib is W, where 2 mm ≤ W ≤ 10 mm.

[0009] Beneficial effects: By setting the width of the reinforcing rib to be within the range of 2 mm to 10 mm, it can not only ensure that the reinforcing rib can sufficiently increase the anti-bending strength of the connecting piece, avoid the connecting piece from breaking after being bent, but also avoid increasing the bending difficulty due to the oversize of the reinforcing rib, so as to ensure the smooth realization of the bending process and ensure the processing rate.

[0010] In an alternative embodiment, the side edge of the body surface of the reinforcing rib away from the connecting section is configured as a rounded corner.

[0011] Beneficial effects: By rounding the side edge of the reinforcing rib, stress concentration can be reduced, the stability of the strength of the reinforcing rib itself can be increased, and thus the reliability of the structure can be improved.

[0012] In an alternative embodiment, the radius of the circle where the rounded corner is located is r, where 0.1 mm ≤ r ≤ 0.5 mm.

[0013] Beneficial effects: By setting the radius r of the circle where the rounded corner is located to be within the range of 0.1 mm to 0.5 mm, it can not only avoid local stress concentration after the connecting piece is bent, reduce the risk of deformation and fracture, but also avoid increasing the bending difficulty due to the oversize of the reinforcing rib, so as to ensure the smooth progress of the bending process.

[0014] In an alternative embodiment, the side surface of the body surface of the reinforcing rib away from the connecting section is the first side surface, the side surface of the reinforcing rib connecting between the first side surface and the body surface of the connecting section is the second side surface, and the second side surface is perpendicular to the first side surface; or, the second side surface is an inclined surface, and the included angle between the second side surface and the first side surface is an obtuse angle.

[0015] Beneficial effects: When the second side surface is perpendicular to the first side surface, the reinforcing effect of the reinforcing rib on the connecting section can also be achieved, and the processing is convenient. By setting the second inclined surface as an inclined surface, the stability of the reinforcing rib can be increased, and the reliability of the connecting piece can be improved.

[0016] In an alternative embodiment, reinforcing ribs are provided on both sides of the connecting section along its thickness direction, and the reinforcing ribs on both sides of the connecting section are arranged correspondingly; alternatively, the reinforcing ribs are provided on one side of the connecting section along its thickness direction.

[0017] Advantageous effects: By providing reinforcing ribs on both sides of the connecting section, the structural strength of the connecting section can be enhanced from both sides simultaneously, improving the strength of the connecting section, that is, improving the structural strength of the connecting piece, and ensuring the uniform stress distribution of the connecting section during bending. Moreover, the total thickness of the reinforcing ribs is distributed to the two reinforcing ribs, which can reduce the thickness of each side of the reinforcing ribs, improve the stability of the reinforcing ribs, and facilitate processing and forming. By providing the reinforcing ribs only on one side of the connecting section, the reinforcing effect of the reinforcing ribs on the structural strength of the connecting section can be achieved, and it is more convenient for processing and forming, ensuring the processing accuracy and improving the processing quality.

[0018] In an alternative embodiment, the reinforcing ribs are formed by the partial regions on the surface of the body of the connecting section protruding away from the surface of the body.

[0019] Advantageous effects: The reinforcing ribs and the connecting section are constructed as a whole, with stable structure, high reliability and convenient processing.

[0020] In an alternative embodiment, positioning holes are further constructed on the connecting section. The positioning holes are arranged at intervals with the reinforcing ribs, and the positioning holes are adapted to cooperate with the positioning posts on the cover plate.

[0021] Advantageous effects: By constructing positioning holes on the connecting section and cooperating the positioning holes with the positioning posts on the cover plate, the positioning of the connecting piece and the cover plate is realized, thereby improving the relative stability between the connecting piece and the cover plate, avoiding the shaking of the connecting piece inside the battery, and improving the assembly quality of the battery.

[0022] In a second aspect, the present invention further provides a battery, including: a housing having an open end; a pole group disposed inside the housing, the pole group having pole tabs; a cover plate disposed at the open end of the housing to close the housing, and a pole post is provided on the cover plate; the above-mentioned connecting piece, the first welding area of the connecting piece is welded to the pole tab, and the second welding area is welded to the pole post. Since the battery includes the connecting piece and has the same effects as the connecting piece, they will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 Structural schematic diagram of a connecting piece according to an embodiment of the present utility model;

[0025] Figure 2 is Figure 1 front view of the connecting piece shown;

[0026] Figure 3 is Figure 2 partial enlarged schematic diagram of A in;

[0027] Figure 4 Structural schematic diagram of another connecting piece according to an embodiment of the present utility model;

[0028] Figure 5 is Figure 4 front view of the connecting piece shown

[0029] Figure 6 Structural schematic diagram of yet another connecting piece according to an embodiment of the present utility model;

[0030] Figure 7 is Figure 6 front view of the connecting piece shown;

[0031] Figure 8 Structural schematic diagram of still another connecting piece according to an embodiment of the present utility model;

[0032] Figure 9 is Figure 8 front view of the connecting piece shown;

[0033] Figure 10 is Figure 1 schematic diagram of the state of the connecting piece after being bent.

[0034] Explanation of reference numerals:

[0035] 1, First welding area; 101, Connecting part; 2, Second welding area; 3, Connecting section; 301, Reinforcing rib; 302, Positioning hole. Detailed implementation manners

[0036] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present utility model.

[0037] The following will describe the embodiments of the present utility model in conjunction with Figures 1 to 10 , describing the embodiments of the present utility model.

[0038] According to an embodiment of the present utility model, on the one hand, a connecting piece is provided, as Figures 1 to 10 shown. The connecting piece includes: a first welding area 1, a second welding area 2, and a connecting section 3. The second welding area 2 is arranged at an interval from the first welding area 1; the connecting section 3 is fixedly connected between the first welding area 1 and the second welding area 2. A reinforcing rib 301 is arranged on the connecting section 3. The extending direction of the reinforcing rib 301 is perpendicular to the extending direction of the connecting section 3. The body thickness of the connecting section 3 is t, and the thickness of the reinforcing rib 301 is t1, satisfying the relational expression: 0.2 ≤ t1 / t ≤ 0.8. Wherein, the thickness refers to the dimension in the "thickness direction" indicated by the arrow in Figure 2 ; the connecting section 3 is connected between the first welding area 1 and the second welding area 2, and the extending direction of the connecting section 3 is the direction of the line connecting the first welding area 1 and the second welding area 2; the reinforcing rib 301 is strip-shaped, and the extending direction of the reinforcing rib 301 refers to the length direction of the reinforcing rib 301, that is, Figure 1 the "first direction" indicated by the arrow in

[0039] Applying the connecting piece of this embodiment, by arranging the reinforcing rib 301 on the connecting section 3 between the first welding area 1 and the second welding area 2 of the connecting piece, when the connecting piece is bent during use, the crease coincides with the reinforcing rib 301. The reinforcing rib 301 increases the structural strength of the bending area of the connecting section 3, thereby improving the anti-bending ability of the connecting piece, avoiding the connecting piece from being broken, and thus improving the overall safety of the battery. Moreover, by setting the ratio of the thickness t1 of the reinforcing rib 301 to the body thickness t of the connecting section 3 to be within the range of 0.2 to 0.8, it can not only ensure that the reinforcing rib 301 provides sufficient strengthening effect for the strength of the connecting piece, reducing the risk of the connecting piece being broken when bent, but also ensure that the connecting piece can be bent smoothly, and can avoid the connecting piece from being too heavy, thereby reducing the cost as much as possible.

[0040] It should be noted that the reinforcing rib 301 is arranged at the part of the connecting piece that needs to be bent, the extending direction of the reinforcing rib 301 coincides with the crease, and the reinforcing rib 301 is used to strengthen the structural strength of the bending area. If the ratio of the thickness t1 of the reinforcing rib 301 to the body thickness t of the connecting section 3 is less than 0.2, the thickness of the reinforcing rib 301 is too small and does not have sufficient strengthening effect, and the connecting piece still has the risk of being broken; if the ratio of the thickness t1 of the reinforcing rib 301 to the body thickness t of the connecting section 3 is greater than 0.8, the thickness of the reinforcing rib 301 is too large, increasing the weight of the connecting piece and making it inconvenient to bend the connecting piece, affecting the use of the connecting piece.

[0041] In one embodiment, further in combination with Figures 1 to 7As shown, reinforcing ribs 301 are provided on both sides of the connecting section 3 in the thickness direction thereof, and the reinforcing ribs 301 on both sides of the connecting section 3 are arranged correspondingly. By providing the reinforcing ribs 301 on both sides of the connecting section 3, the structural strength of the connecting section 3 can be enhanced simultaneously from both sides, improving the strength of the connecting section 3, that is, improving the structural strength of the connecting piece, and ensuring the uniform stress distribution of the connecting section 3 during bending. Moreover, the total thickness of the reinforcing ribs 301 is distributed to the two reinforcing ribs 301, which can reduce the thickness of each side of the reinforcing rib 301, improve the stability of the reinforcing rib 301, and facilitate processing and forming.

[0042] Preferably, the two reinforcing ribs 301 on both sides of the connecting section 3 in the thickness direction are symmetrically arranged.

[0043] In addition, in other embodiments, further in combination with Figures 8 to 9 As shown, the reinforcing rib 301 is provided on one side of the connecting section 3 in the thickness direction thereof. By providing the reinforcing rib 301 only on one side of the connecting section 3, the reinforcing effect of the reinforcing rib 301 on the structural strength of the connecting section 3 can also be achieved, and it is more convenient for processing and forming, ensuring the processing accuracy and improving the processing quality.

[0044] In one embodiment, the value range of the thickness t1 of the reinforcing rib 301 is: 0.1 mm ≤ t1 ≤ 1 mm. Further in combination with Figure 3 As shown, in the thickness direction, the body thickness of the connecting piece is t, and the total thickness of the body of the connecting piece plus the reinforcing rib 301 is T. Then the thickness t1 of the reinforcing rib 301 = T - t, that is, 0.1 mm ≤ T - t ≤ 1 mm. If the thickness t1 of the reinforcing rib 301 is less than 0.1 mm, the thickness of the reinforcing rib 301 is too small to provide sufficient reinforcement, and the connecting piece still has the risk of breaking; if the thickness t1 of the reinforcing rib 301 is greater than 1 mm, the thickness of the reinforcing rib 301 is too large, the extension distance of the reinforcing rib 301 in the thickness direction is too long, the stability is poor, and it will excessively increase the weight of the connecting piece, and it is not convenient for the connecting piece to be bent, affecting the use of the connecting piece. Therefore, by setting the thickness t1 of the reinforcing rib 301 to take values in the range of 0.1 mm to 1 mm, it can not only ensure that the reinforcing rib 301 can provide sufficient reinforcement for the connecting piece, improve the anti-bending ability of the connecting piece, avoid the connecting piece from being broken, but also ensure the stability of the connecting piece, ensure the smooth bending of the connecting piece, and avoid the excessive weight of the connecting piece.

[0045] In one embodiment, further in combination with Figure 3 As shown, the width of the reinforcing rib 301 is W, wherein, 2 mm ≤ W ≤ 10 mm. Among them, the width refers to the dimension along Figure 1 and Figure 2 the dimension in the "second direction" indicated by the arrow in, that is, the dimension along the extension direction of the connecting piece. The "second direction" is perpendicular to the "first direction". Further in combination with Figure 10It can be seen that after the connecting piece is bent, the reinforcing rib 301 is located at the turning part of the bent part. The reinforcing rib 301 bends along with the connecting piece in its width direction. If the width of the reinforcing rib 301 is less than 2 mm, the width of the reinforcing rib 301 is too small to provide sufficient strengthening effect for the connecting piece in the first direction, and it is prone to deformation and fracture. If the width of the reinforcing rib 301 is greater than 10 mm, the width of the reinforcing rib 301 is too large, and there is too much material at the bent part of the connecting piece, increasing the bending difficulty. Therefore, by setting the width of the reinforcing rib 301 to take values within the range of 2 mm to 10 mm, it can not only ensure that the reinforcing rib 301 sufficiently increases the anti-bending strength of the connecting piece and avoid fracture of the connecting piece after bending, but also avoid increasing the bending difficulty due to the too large size of the reinforcing rib 301, thus ensuring the smooth realization of the bending process and the machining rate.

[0046] In one embodiment, further in combination with Figures 1 to 3 As shown, the side of the reinforcing rib 301 away from the body surface of the connecting section 3 is constructed as a rounded corner. The reinforcing rib 301 is in a long strip shape, and the two sides along its width direction are constructed as rounded corners. By rounding the sides of the reinforcing rib 301, stress concentration can be reduced, and the stability of the strength of the reinforcing rib 301 itself can be increased, thereby improving the reliability of the structure.

[0047] In one embodiment, further in combination with Figure 3 As shown, the radius of the circle where the rounded corner is located is r, where 0.1 mm ≤ r ≤ 0.5 mm. The size of the radius r determines the size of the rounded corner. The larger the rounded corner, the larger the width of the reinforcing rib 301 required. If the radius r corresponding to the rounded corner is less than 0.1 mm, the rounded corner is too small, and after the connecting piece is bent, local stress concentration occurs at the rounded corner, and it is prone to deformation and fracture. If the radius r corresponding to the rounded corner is greater than 0.5 mm, the rounded corner is too large, and correspondingly, the width of the reinforcing rib 301 is too large, and there is too much material at the bent part of the connecting piece, increasing the bending difficulty. Therefore, by setting the radius r of the circle where the rounded corner is located to take values within the range of 0.1 mm to 0.5 mm, it can not only avoid local stress concentration after the connecting piece is bent and reduce the risk of deformation and fracture, but also avoid increasing the bending difficulty due to the too large size of the reinforcing rib 301, thus ensuring the smooth progress of the bending process.

[0048] It should be noted that the side of the reinforcing rib 301 away from the body surface of the connecting section 3 is the first side surface, and the side of the reinforcing rib 301 connecting between the first side surface and the body surface of the connecting section 3 is the second side surface. The rounded corner is set at the intersection of the first side surface and the second side surface.

[0049] In addition, in other embodiments, further in combination with Figures 4 to 5 As shown, the second side surface is perpendicular to the first side surface, and the reinforcing effect of the reinforcing rib 301 on the connecting section 3 can also be realized, and the processing is convenient.

[0050] In addition, in other embodiments, further combined with Figures 6 to 7 As shown, the second side surface is an inclined surface, and the included angle between the second side surface and the first side surface is an obtuse angle. By setting the second inclined surface as an inclined surface, the stability of the reinforcing rib 301 can be increased, and the reliability of the connecting piece can be improved.

[0051] In one embodiment, the connection between the second side surface and the body surface of the connecting section 3 is transitioned by a rounded corner, which can reduce the stress concentration at this place and further reduce the risk of the connecting piece breaking after being bent.

[0052] In one embodiment, the reinforcing rib 301 protrudes from a partial area on the body surface of the connecting section 3 in a direction away from the body surface. The reinforcing rib 301 and the connecting section 3 are constructed as one body, with stable structure, high reliability, and convenient processing.

[0053] In one embodiment, a positioning hole 302 is further constructed on the connecting section 3. The positioning hole 302 and the reinforcing rib 301 are arranged at intervals, and the positioning hole 302 is adapted to cooperate with the positioning post on the cover plate. Wherein, the positioning post is a structure fixedly connected to the side of the cover plate facing the connecting piece. By constructing the positioning hole 302 on the connecting section 3 and cooperating the positioning hole 302 with the positioning post on the cover plate, the positioning of the connecting piece and the cover plate is realized, thereby improving the relative stability between the connecting piece and the cover plate, avoiding the connecting piece from shaking inside the battery, and improving the assembly quality of the battery.

[0054] In one embodiment, the first welding area 1 includes a plurality of connecting portions 101 arranged at intervals. Each connecting portion 101 is adapted to be welded to the tab on at least one pole group to connect a plurality of pole groups on the same connecting piece. Among them, the polarities of the tabs connected to the two connecting portions 101 on the same connecting piece are the same, that is, both are positive tabs or both are negative tabs. Preferably, the number of the connecting portions 101 is two.

[0055] In one embodiment, the surface of the second welding area 2 is constructed with embossed patterns to prevent welding reflection.

[0056] In this embodiment, the connecting section 3 on the connecting piece is a bending area, and there is a strengthening portion on the connecting section 3. The reinforcing rib 301 makes the local part of the body of the connecting section 3 thickened. The reinforcing rib 301 can be arranged on one side or both sides. Since the connecting piece needs to be welded to the tab, usually the material of the connecting piece is soft in hardness, and there is a risk of breakage at the bending part after assembly and bending. Therefore, the reinforcing rib 301 is locally arranged in the bending area to improve the anti-bending strength of the connecting piece and improve the overall safety of the battery.

[0057] According to an embodiment of the present utility model, on the other hand, a battery is further provided, including: a housing, a pole group, a cover plate, and the above-mentioned connecting piece. The housing has an open end; the pole group is disposed inside the housing, and the pole group has pole tabs; the cover plate is disposed at the open end of the housing to seal the housing, and a pole post is disposed on the cover plate; the first welding area 1 of the connecting piece is welded to the pole tab, and the second welding area 2 is welded to the pole post.

[0058] In one embodiment, the battery is a power battery. Specifically, the battery may be a lithium-ion power battery.

[0059] Although the embodiments of the present utility model have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present utility model, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A connecting sheet, characterized in that: include: First welding area; a second welding area, spaced apart from the first welding area; A connecting section is fixedly connected between the first welding area and the second welding area. A reinforcing rib is arranged on the connecting section. The extending direction of the reinforcing rib is perpendicular to the extending direction of the connecting section. The main body thickness of the connecting section is t, and the thickness of the reinforcing rib is t1, satisfying the relationship: 0.2≤t1 / t≤0.

8.

2. The connecting piece according to claim 1, characterized in that: The thickness t1 of the reinforcing rib has a value range of 0.1 mm ≤ t1 ≤ 1 mm.

3. The connecting sheet according to claim 1, characterized in that: The width of the reinforcing rib is W, wherein 2mm≤W≤10mm.

4. The connecting sheet according to claim 1, characterized in that: The side of the reinforcing rib away from the main body surface of the connecting section is configured as a rounded corner.

5. The connecting piece according to claim 4, characterized in that: The radius of the circle where the rounded corner is located is r, wherein 0.1 mm≤r≤0.5 mm.

6. The connecting sheet according to claim 1, characterized in that: The side of the reinforcing rib away from the main body surface of the connecting section is the first side, and the side of the reinforcing rib connected between the first side and the main body surface of the connecting section is the second side. The second side surface is perpendicular to the first side surface; or, the second side surface is an inclined surface, and the angle between the second side surface and the first side surface is an obtuse angle.

7. The connecting sheet according to claim 1, characterized in that: The connecting section is provided with reinforcing ribs on both sides along the thickness direction thereof, and the reinforcing ribs on both sides of the connecting section are provided correspondingly; Alternatively, the reinforcing rib is arranged on one side of the connecting section along the thickness direction thereof.

8. The connecting sheet according to claim 1, characterized in that: The reinforcing rib is formed by a partial area on the main body surface of the connecting section protruding in a direction away from the main body surface.

9. The connecting piece according to any one of claims 1 to 8, characterized in that: The connecting section is also provided with a positioning hole, the positioning hole is spaced apart from the reinforcing rib, and the positioning hole is suitable for cooperating with a positioning column on the cover plate.

10. A battery, characterized in that: include: a housing having an open end; A pole group is arranged inside the shell, and the pole group has pole ears; A cover plate is arranged at the open end of the shell to close the shell, and a pole is arranged on the cover plate; The connecting piece according to any one of claims 1 to 9, wherein the first welding area of ​​the connecting piece is welded to the pole lug, and the second welding area is welded to the pole.

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