Battery terminal, battery top cover and lithium battery

Abstract

The utility model provides a battery terminal, a battery top cover and a lithium battery. The battery terminal comprises a terminal head and a terminal body, the terminal head and the terminal body are of an integrated punch forming structure, the terminal body comprises a fixing ring, a column body and a chamfer structure, the fixing ring is fixedly connected to the terminal head, and the column body is fixedly connected to the terminal head. One end of the column body penetrates through the fixing ring and is fixedly connected with the terminal head part, the other end of the column body is fixedly connected with the chamfering structure, the fixing ring and the column body are located on the same side of the terminal head part, the chamfering structure is provided with a guide inclined plane, the guide inclined plane is used for abutting against a lower die, and the lower die is provided with an upper die. And the lower die is punched along the guide inclined surface during die assembly. Compared with the prior art, through two-time stamping forming, the chamfering structure 230 is formed during first-time stamping, the chamfering structure 230 is provided with the guide inclined face 231, stamping of the lower die along the guide inclined face 231 during second-time stamping is facilitated, burrs are prevented from being generated at steps formed through second-time stamping, and then the product yield is increased.

Description

Technical Field

[0001] The present invention relates to the field of battery terminal production, and in particular to a battery terminal, a battery top cover and a lithium battery. Background Art

[0002] Battery terminals are components used to connect the positive and negative electrodes of the battery and are an important component of the battery system. The main function of battery terminals is to transfer electrical energy and achieve energy transmission between the battery and the external circuit. In traditional technology, battery terminals are made through die-casting, that is, by applying high pressure to the molten metal in the mold, but the die-casting process has the problem of being cumbersome.

[0003] In order to solve the above problems, Chinese patent application number CN201220408507.7 discloses a stamped battery terminal, including a fixing portion with an annular structure, one side of the fixing portion is open, a pair of parallel clamping arms extend outward from the opening, an adjustment gap is formed between the two clamping arms, a connecting terminal is provided on the side of the fixing portion away from the opening, a stud for connecting the wiring harness is provided on the connecting terminal, the clamping arm, the connecting terminal and the fixing portion are integrally formed by stamping, the annular structure includes a circular hole, the periphery of the circular hole extends outward to form a fixed edge, a locking device is provided on the clamping arm, the locking device includes a locking plate, a locking bolt and a locking nut, the locking plate is a stamped part, including a locking plate body and a clamping portion for clamping the two clamping arms, a through hole is provided on the locking plate, the bolt passes through the adjustment gap and the through hole and cooperates with the nut.

[0004] However, the structural design of the above battery terminal has the following problems during use:

[0005] The clamp arm, connecting terminal and fixing part of the battery terminal are integrally formed by stamping. Compared with the die-casting process, the stamping process is simpler and improves production efficiency. Since the terminal is stamped multiple times by different molds, and the material needs to form a step structure at the bottom of the terminal during the last stamping step, the lower mold directly stamps the bottom of the material, which is prone to burrs, resulting in a low product yield.

[0006] Therefore, there is an urgent need for a battery terminal that can avoid burrs and has a high product yield. Utility Model Content

[0007] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a battery terminal, a battery top cover and a lithium battery that avoid burrs and have a high product yield.

[0008] The purpose of this disclosure is achieved through the following technical solutions:

[0009] A battery terminal, comprising:

[0010] The terminal head and the terminal body, the terminal head and the terminal body are an integral stamping structure, the terminal body includes a fixing ring, a column and a chamfer structure, the fixing ring is fixedly connected to the terminal head, one end of the column passes through the fixing ring and is fixedly connected to the terminal head, the other end of the column is fixedly connected to the chamfer structure, the fixing ring and the column are located on the same side of the terminal head, the chamfer structure is provided with a guide bevel, the guide bevel is used to abut against the lower mold so that the lower mold can be stamped along the guide bevel when the mold is closed.

[0011] In one embodiment, there is a preset angle between the guide slope and the horizontal plane, and the preset angle is 120°-140°.

[0012] In one embodiment, the fixing ring, the column and the chamfered structure are an integrally stamped structure.

[0013] In one embodiment, the height of the chamfered structure is 1 mm-1.5 mm.

[0014] In one embodiment, the height of the terminal head is greater than the height of the fixing ring.

[0015] In one embodiment, the height of the column is 8mm-10mm.

[0016] A battery top cover comprises a cover plate, a plastic part and a battery terminal as described in any of the above embodiments, wherein the cover plate is provided with a mounting groove, the plastic part is located in the mounting groove and connected to the cover plate, and the battery terminal is connected to the plastic part.

[0017] A lithium battery comprises a shell and a battery top cover as described in any one of the above embodiments, wherein the battery top cover is welded to the shell.

[0018] Compared with the prior art, the present invention has at least the following advantages:

[0019] In the above-mentioned battery terminal, the fixing ring is fixedly connected to the terminal head, the column is fixedly connected to the terminal head, the column and the fixing ring are located on the same side of the terminal head, the bottom of the column is fixedly connected to the chamfered structure, and the chamfered structure is provided with a guide bevel, which abuts against the lower die. Specifically, the terminal head, the fixing ring, the column and the chamfered structure are formed by a metal block by a die in one time, and the chamfered structure is stamped by a different die during the secondary stamping. At this time, the guide bevel abuts against the lower die. During the secondary stamping, the lower die stamps the chamfered structure along the guide bevel to avoid burrs when the chamfered structure is stamped, thereby improving the product yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present disclosure and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 is a schematic structural diagram of a battery terminal according to an embodiment;

[0022] Figure 2 for Figure 1 Schematic diagram of the step-by-step molding of the battery terminal shown. DETAILED DESCRIPTION

[0023] In order to facilitate the understanding of the present disclosure, the present disclosure will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present disclosure are given in the drawings. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present disclosure more thoroughly and comprehensively understood.

[0024] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present disclosure. The terms used herein in the specification of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0026] The present disclosure provides a battery terminal, comprising a terminal head and a terminal body, wherein the terminal head and the terminal body are an integral stamping structure, and the terminal body comprises a fixing ring, a column and a chamfer structure, the fixing ring is fixedly connected to the terminal head, one end of the column passes through the fixing ring and is fixedly connected to the terminal head, and the other end of the column is fixedly connected to the chamfer structure, the fixing ring and the column are located on the same side of the terminal head, and the chamfer structure is provided with a guide bevel, and the guide bevel is used to abut against the lower mold so that the lower mold can be stamped along the guide bevel when the lower mold is closed.

[0027] In one embodiment, there is a preset angle between the guide slope and the horizontal plane, and the preset angle is 120°-140°.

[0028] In one embodiment, the fixing ring, the column and the chamfered structure are an integrally stamped structure.

[0029] In one embodiment, the height of the chamfered structure is 1 mm-1.5 mm.

[0030] In one embodiment, the height of the terminal head is greater than the height of the fixing ring.

[0031] In one embodiment, the height of the column is 8mm-10mm.

[0032] A battery top cover comprises a cover plate and the battery terminal described in any one of the above embodiments, wherein the cover plate is provided with a mounting groove, and the battery terminal is located in the mounting groove and connected to the cover plate.

[0033] A lithium battery comprises a shell and a battery top cover as described in any one of the above embodiments, wherein the battery top cover is welded to the shell.

[0034] In the above-mentioned battery terminal, the fixing ring is fixedly connected to the terminal head, the column is fixedly connected to the terminal head, the column and the fixing ring are located on the same side of the terminal head, the bottom of the column is fixedly connected to the chamfered structure, and the chamfered structure is provided with a guide bevel, which abuts against the lower die. Specifically, the terminal head, the fixing ring, the column and the chamfered structure are formed by a metal block by a die in one time, and the chamfered structure is stamped by a different die during the secondary stamping. At this time, the guide bevel abuts against the lower die. During the secondary stamping, the lower die stamps the chamfered structure along the guide bevel to avoid burrs when the chamfered structure is stamped, thereby improving the product yield.

[0035] In order to better understand the technical solutions and beneficial effects of the present invention, the present invention is further described in detail below in conjunction with specific embodiments:

[0036] like Figure 1 and Figure 2As shown, a battery terminal 10 of an embodiment includes a terminal head 100 and a terminal body 200, wherein the terminal head 100 and the terminal body 200 are an integral stamping structure, and the terminal body 200 includes a fixing ring 210, a column 220 and a chamfering structure 230, wherein the fixing ring 210 is fixedly connected to the terminal head 100, one end of the column 220 passes through the fixing ring 210 and is fixedly connected to the terminal head 100, and the other end of the column 220 is fixedly connected to the chamfering structure 230, the fixing ring 210 and the column 220 are located on the same side of the terminal head 100, and the chamfering structure 230 is provided with a guide bevel 231, and the guide bevel 231 is used to abut against the lower mold so that the lower mold can be stamped along the guide bevel 231 when the lower mold is closed.

[0037] In this embodiment, a metal block is placed in the first stamping die, and the upper die and the lower die are combined to stamp out the terminal head 100, the fixing ring 210, the column 220 and the chamfered structure 230 from the metal block. At this time, the semi-finished terminal is placed in the second stamping die for stamping, and the chamfered structure 230 abuts against the lower die, so that when the upper die and the lower die are combined, the lower die is stamped along the guide bevel 231, and then the chamfered structure 230 is stamped out to form a step, while avoiding the generation of burrs. Specifically, compared with the traditional process of forming a step in one time, the present application is formed by two stampings, and the chamfered structure 230 is formed in the first stamping. The chamfered structure 230 is provided with a guide bevel 231, which is conducive to the stamping of the lower die along the guide bevel 231 during the second stamping, avoiding the generation of burrs at the step formed by the secondary stamping, thereby improving the product yield.

[0038] In the battery terminal 10 described above, the fixing ring 210 is fixedly connected to the terminal head 100, the column 220 is fixedly connected to the terminal head 100, the column 220 and the fixing ring 210 are located on the same side of the terminal head 100, the bottom of the column 220 is fixedly connected to the chamfer structure 230, and the chamfer structure 230 is provided with a guide bevel 231, and the guide bevel 231 abuts against the lower die. Specifically, the terminal head 100, the fixing ring 210, the column 220 and the chamfer structure 230 are formed by stamping a metal block once by a die, and the chamfer structure 230 is stamped by a different die during the secondary stamping, at which time the guide bevel 231 abuts against the lower die, and during the secondary stamping, the lower die stamps the chamfer structure 230 along the guide bevel 231 to avoid the formation of burrs when the chamfer structure 230 is stamped, thereby improving the product yield.

[0039] In one embodiment, there is a preset angle between the guide slope 231 and the horizontal plane, and the preset angle is 120°-140°. In this embodiment, the preset angle is 120°, that is, the included angle between the guide slope 231 and the horizontal plane is 120°.

[0040] In one embodiment, the fixing ring 210, the column 220 and the chamfered structure 230 are an integrally stamped structure. In this embodiment, the fixing ring 210, the column 220 and the chamfered structure 230 are formed by the first stamping of the mold.

[0041] In one embodiment, the height of the chamfered structure 230 is 1 mm-1.5 mm. In this embodiment, the height of the chamfered structure 230 is 1 mm.

[0042] In one embodiment, the height of the terminal head 100 is greater than the height of the fixing ring 210. In this embodiment, the height of the terminal head 100 is 2 mm, and the height of the fixing ring 210 is 1 mm.

[0043] In one embodiment, the height of the column 220 is 8 mm-10 mm. In this embodiment, the height of the column 220 is 8 mm.

[0044] The present application also provides a battery top cover, including a cover plate, a plastic part, and a battery terminal 10 as described in any embodiment, wherein the cover plate is provided with a mounting groove, the plastic part is located in the mounting groove and connected to the cover plate, and the battery terminal 10 is connected to the plastic part. It can be understood that the plastic part is fixed to the cover plate by laser welding, the battery terminal 10 is welded to the plastic part, and the plastic part plays an insulating and sealing role.

[0045] The present application also provides a lithium battery, comprising a housing and a battery top cover as described in any of the above embodiments, wherein the battery top cover is welded to the housing. It can be understood that the housing is welded to the cover plate, and the battery cell is located in the housing and welded to the battery terminal 10, so that the battery terminal 10 is connected to the battery to form a circuit.

[0046] Compared with the prior art, the present invention has at least the following advantages:

[0047] In the battery terminal 10 described above, the fixing ring 210 is fixedly connected to the terminal head 100, the column 220 is fixedly connected to the terminal head 100, the column 220 and the fixing ring 210 are located on the same side of the terminal head 100, the bottom of the column 220 is fixedly connected to the chamfer structure 230, and the chamfer structure 230 is provided with a guide bevel 231, and the guide bevel 231 abuts against the lower die. Specifically, the terminal head 100, the fixing ring 210, the column 220 and the chamfer structure 230 are formed by stamping a metal block once by a die, and the chamfer structure 230 is stamped by a different die during the secondary stamping, at which time the guide bevel 231 abuts against the lower die, and during the secondary stamping, the lower die stamps the chamfer structure 230 along the guide bevel 231 to avoid the formation of burrs when the chamfer structure 230 is stamped, thereby improving the product yield.

[0048] The above-mentioned embodiments only express several implementation methods of the present disclosure, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present disclosure, and these all belong to the protection scope of the present disclosure. Therefore, the protection scope of the patent of the present disclosure shall be based on the attached claims.

Claims

1. A battery terminal, comprising a terminal head and a terminal body, wherein the terminal head and the terminal body are an integral stamping structure, characterized in that: The terminal body includes a fixing ring, a column and a chamfered structure, the fixing ring is fixedly connected to the terminal head, one end of the column passes through the fixing ring and is fixedly connected to the terminal head, the other end of the column is fixedly connected to the chamfered structure, the fixing ring and the column are located on the same side of the terminal head, the chamfered structure is provided with a guide bevel, the guide bevel is used to abut against the lower mold so that the lower mold can be stamped along the guide bevel when the mold is closed.

2. The battery terminal according to claim 1, characterized in that: There is a preset angle between the guide slope and the horizontal plane, and the preset angle is 120°-140°.

3. The battery terminal according to claim 1, characterized in that The fixing ring, the column and the chamfered structure are an integrated stamping structure.

4. The battery terminal according to claim 1, characterized in that: The height of the chamfered structure is 1 mm-1.5 mm.

5. The battery terminal according to claim 1, characterized in that: The height of the terminal head is greater than the height of the fixing ring.

6. The battery terminal according to claim 1, characterized in that: The height of the column is 8mm-10mm.

7. A battery top cover, characterized in that: It comprises a cover plate, a plastic part and the battery terminal as claimed in claims 1 to 6, wherein the cover plate is provided with a mounting groove, the plastic part is located in the mounting groove and connected to the cover plate, and the battery terminal is connected to the plastic part.

8. A lithium battery, characterized in that: It comprises a shell and the battery top cover as claimed in claim 7, wherein the battery top cover is welded to the shell.

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