A cylindrical battery

Abstract

The present invention discloses a cylindrical battery, which includes a housing, a pole column and a current collecting plate. One end of the housing is closed, the pole column penetrates through the closed end of the housing, the current collecting plate is arranged inside the housing and is welded to the pole column. One of the pole column and the current collecting plate has a slot, and the other of the pole column and the current collecting plate has a plug post, and the plug post can be inserted into the slot. The cylindrical battery of the present invention can ensure the connection reliability between the pole column and the current collecting plate through the cooperation of the plug post and the slot and then welding, thereby avoiding the malfunction of the cylindrical battery caused by the separation of the current collecting plate and the pole column.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and particularly to a cylindrical battery. Background Art

[0002] With the development of battery technology, a kind of earless battery has emerged. This earless battery includes a housing, a wound core, a current collector plate and a terminal. The current collector plate is connected to the wound core and the terminal, so as to realize the conduction between the wound core and the terminal. In the prior art, the connection between the terminal and the current collector plate is not firm, and the two often become separated, reducing the reliability of the entire cylindrical battery. Summary of the Invention

[0003] The purpose of the present invention is to provide a cylindrical battery, in which the connection reliability between the current collector plate and the terminal is relatively high, thereby improving the reliability of the entire cylindrical battery.

[0004] The present invention discloses a cylindrical battery, including: a housing, one end of the housing is closed; a terminal, the terminal penetrates through the closed end of the housing; a current collector plate, the current collector plate is arranged in the housing and is welded to the terminal; wherein: one of the terminal and the current collector plate has a slot, and the other of the terminal and the current collector plate has a plug post, and the plug post can be inserted into the slot.

[0005] In some embodiments, there is a filler solder between the terminal and the current collector plate.

[0006] In some specific embodiments, a fitting gap is provided between the plug post and the slot, and the filler solder is arranged in the fitting gap.

[0007] In some specific embodiments, the filler solder includes a solder coating provided on the terminal and / or the current collector plate.

[0008] In some specific embodiments, the side of the terminal facing the current collector plate has a plurality of bifurcations, and a receiving groove is defined between two adjacent bifurcations, and the receiving groove is used to receive the filler solder.

[0009] In some embodiments, the cross-section of the slot is any one of circular, polygonal, elliptical, oblong.

[0010] In some specific embodiments, the area of the cross-section of the slot gradually decreases from the opening towards the bottom.

[0011] In some embodiments, the depth of the slot is H, and H satisfies the relation: H≥0.2 mm.

[0012] In some embodiments, a plurality of the slots are spaced apart, and the number of the insertion posts is less than or equal to the number of the slots.

[0013] In some embodiments, the cylindrical battery further includes an insulating member, which is sleeved on the pole post and penetrates through the housing.

[0014] The beneficial effects of the cylindrical battery of the present invention are as follows: By means of the cooperation of the insertion posts and the slots and then welding, the connection reliability between the pole post and the current collecting plate can be ensured, thereby avoiding the malfunction of the cylindrical battery caused by the detachment of the current collecting plate and the pole post.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is the structure of the cylindrical battery according to the embodiment of the present invention;

[0017] Figure 2 is a schematic structural view of the first cooperation between the pole post and the current collecting plate according to the embodiment of the present invention;

[0018] Figure 3 is a schematic structural view of the second cooperation between the pole post and the current collecting plate according to the embodiment of the present invention;

[0019] Figure 4 is a schematic structural view of the third cooperation between the pole post and the current collecting plate according to the embodiment of the present invention;

[0020] Figure 5 is a schematic structural view of the fourth cooperation between the pole post and the current collecting plate according to the embodiment of the present invention;

[0021] Figure 6 is a schematic structural view of the fifth cooperation between the pole post and the current collecting plate according to the embodiment of the present invention;

[0022] Figure 7 is a schematic structural view of the sixth cooperation between the pole post and the current collecting plate according to the embodiment of the present invention;

[0023] Figure 8 is a schematic structural view of the seventh cooperation between the pole post and the current collecting plate according to the embodiment of the present invention.

[0024] Reference Signs:

[0025] 1. Housing;

[0026] 2. Pole Post; 21. Bifurcation; 22. Receiving Groove;

[0027] 3. Current Collecting Plate;

[0028] 401. Insertion Post; 402. Slot;

[0029] 5. Filled solder; 51. Solder coating;

[0030] 6. Insulating member. Specific embodiments

[0031] To make the technical problems solved by the present invention, the technical solutions adopted and the achieved technical effects clearer, the technical solutions of the present invention will be further described below with reference to the drawings and through specific embodiments.

[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0033] In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features, which are used to distinguish and describe features, without order or weight. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0034] In the description of the present invention, it should be noted that, unless otherwise clearly defined and limited, the terms "mounted", "connected" and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0035] Next, refer to Figures 1 - 3 to describe the specific structure of the cylindrical battery according to the embodiments of the present invention.

[0036] The present invention discloses a cylindrical battery. As Figure 1 shown, the cylindrical battery of this embodiment includes a housing 1, a terminal 2 and a current collector plate 3. One end of the housing 1 is closed, the terminal 2 penetrates through the closed end of the housing 1, the current collector plate 3 is arranged inside the housing 1 and is welded to the terminal 2. One of the terminal 2 and the current collector plate 3 has a slot 402, and the other of the terminal 2 and the current collector plate 3 has a plug 401, and the plug 401 can be inserted into the slot 402.

[0037] First, it should be noted that in this embodiment, there are various distribution methods for the slot 402 and the stud 401. For example, in some embodiments, as Figure 2 shown, the slot 402 is provided on the pole 2, and the stud 401 is provided on the bus bar 3; for another example, as Figure 3 shown, in some embodiments, the stud 401 is provided on the pole 2, and the slot 402 is provided on the bus bar 3; for still another example, in some embodiments, as Figure 4 shown, both the stud 401 and the slot 402 are provided on the pole 2, and the bus bar 3 also has the stud 401 and the slot 402.

[0038] It can be understood that during the actual assembly process, the bus bar 3 is placed on the pole 2, and after ensuring that the stud 401 is fitted in the slot 402, the two are welded. By the way of the stud 401 being fitted in the slot 402 and then welded, the connection reliability between the pole 2 and the bus bar 3 can be ensured, thus avoiding the occurrence of defects in the cylindrical battery caused by the separation of the bus bar 3 and the pole 2.

[0039] In some embodiments, there is a filling solder 5 between the pole 2 and the bus bar 3. It can be understood that compared with laser welding, welding with the filling solder 5 provided between the pole 2 and the bus bar 3 makes the joint strength between the pole 2 and the bus bar 3 higher and the reliability better.

[0040] It should be additionally noted here that in the present invention, the filling solder 5 can be selected as solid, semi-solid or liquid according to actual needs, and the form of the filling solder 5 is not limited herein.

[0041] In some specific embodiments, as Figure 5 shown, there is a fitting gap between the stud 401 and the slot 402, and the filling solder 5 is provided in the fitting gap. It can be understood that there is a fitting gap between the stud 401 and the slot 402, and the filling solder 5 is in the fitting gap. After welding, the stud 401 can be firmly fixed in the slot 402, making the connection between the bus bar 3 and the pole 2 more firm.

[0042] It should be additionally noted that the fitting gap can be provided between the end face of the stud 401 and the bottom wall of the slot 402, or can be provided between the peripheral surface of the stud 401 and the peripheral surface of the slot 402, or can be provided both between the end face of the stud 401 and the bottom wall of the slot 402 and between the peripheral surface of the stud 401 and the peripheral surface of the slot 402. The position of the fitting gap can be selected according to actual needs.

[0043] In some specific embodiments, as Figures 6 - 8As shown, the filling solder 5 includes a solder coating 51 provided on the terminal post 2 and / or the bus bar 3. It should be noted that in this embodiment, the position of the solder coating 51 can be selected according to actual needs. For example, in some embodiments, as Figure 6 shown, the solder coating 51 is provided on the side of the terminal post 2 facing the bus bar 3; for another example, in some embodiments, as Figure 7 shown, the solder coating 51 is provided on the side of the bus bar 3 facing the terminal post 2; for still another example, as Figure 8 shown, the solder coating 51 is provided on both the bus bar 3 and the terminal post 2 at the same time. It can be understood that the filling solder 5 is formed on the terminal post 2 and / or the bus bar 3, so that there is no need to manually lay the filling solder 5 during the installation process, which simplifies the installation process of the cylindrical battery in this embodiment.

[0044] In some specific embodiments, as Figure 1 shown, the side of the terminal post 2 facing the bus bar 3 has a plurality of bifurcations 21, and a receiving groove 22 is defined between two adjacent bifurcations 21. The receiving groove 22 is used to receive the filling solder 5. It can be understood that the added receiving groove 22 can increase the total amount of the filling solder 5 between the terminal post 2 and the bus bar 3, thereby improving the connection reliability between the terminal post 2 and the bus bar 3. It should be noted here that the number and shape of the receiving groove 22 can be selected according to actual needs, and the number, shape and distribution method of the receiving groove 22 are not limited herein.

[0045] In some embodiments, the cross-section of the slot 402 is any one of a circle, a polygon, an ellipse, and an oblong. It should be noted that the shape of the slot 402 can be selected as other regular or irregular shapes according to actual needs, and is not limited to the above description. And the shapes of the cross-sections of the plug post 401 and the slot 402 can be the same, similar, or different.

[0046] In some specific embodiments, the cross-sectional area of the slot 402 gradually decreases from the opening towards the bottom. Thus, it is convenient for the plug post 401 to be inserted into the slot 402, thereby simplifying the installation of the cylindrical battery in this embodiment.

[0047] In some embodiments, the depth of the slot 402 is H, and H satisfies the relationship: H≥0.2 mm. It can be understood that if the depth of the slot 402 is too shallow, the fitting strength between the plug post 401 and the slot 402 will be reduced. In this embodiment, setting the depth of the slot 402 at 0.2 mm or more can better ensure the fitting strength between the plug post 401 and the slot 402, thereby ensuring the fitting strength between the bus bar 3 and the terminal post 2.

[0048] In some embodiments, there are multiple spaced-apart slots 402, and the number of stud posts 401 is less than or equal to the number of slots 402. It can be understood that having multiple slots 402 can further ensure the mating strength between the bus bar 3 and the terminal post 2. It should be added that when the number of stud posts 401 is less than the number of slots 402, the slots 402 can serve as receiving grooves 22 for receiving the filling solder 5, thereby increasing the total amount of the filling solder 5 between the bus bar 3 and the terminal post 2, and thus enhancing the welding strength between the bus bar 3 and the terminal post 2.

[0049] In some embodiments, such as Figure 1 shown, the cylindrical battery further includes an insulating member 6. The insulating member 6 is sleeved on the terminal post 2 and penetrates through the housing 1. It can be understood that the insulating member 6 can ensure insulation between the housing 1 and the terminal post 2, thereby enhancing the use safety of the cylindrical battery.

[0050] Embodiment:

[0051] Next, refer to Figures 1 - 8 to describe the specific structure of the cylindrical battery according to a specific embodiment of the present invention.

[0052] Such as Figure 1 shown, the cylindrical battery of this embodiment includes a housing 1, a terminal post 2, a bus bar 3, and an insulating member 6. One end of the housing 1 is closed, the terminal post 2 penetrates through the closed end of the housing 1, the bus bar 3 is arranged inside the housing 1 and is welded to the terminal post 2. The insulating member 6 is sleeved on the terminal post 2 and penetrates through the housing 1.

[0053] The mating structures of the terminal post 2 and the bus bar 3 in this embodiment are as follows:

[0054] The first structure, as Figure 2 shown, the terminal post 2 is provided with stud posts 401, and the bus bar 3 is provided with slots 402 that cooperate with the stud posts 401;

[0055] The second structure, as Figure 3 shown, the terminal post 2 is provided with slots 402, and the bus bar 3 is provided with stud posts 401 that cooperate with the slots 402;

[0056] The third structure, as Figure 4 shown, the terminal post 2 is provided with slots 402 and stud posts 401, and the bus bar 3 is provided with slots 402 and stud posts 401;

[0057] The fourth structure, as Figure 5 shown, the terminal post 2 is provided with stud posts 401, and the bus bar 3 is provided with slots 402 that cooperate with the stud posts 401; there is a mating gap between the stud posts 401 and the slots 402, and the mating gap is filled with filling solder 5. Of course, the stud posts 401 and the slots 402 can also be arranged in the form of the above second structure or third structure.

[0058] The fifth structure is as follows Figure 6 As shown, an insertion post 401 is provided on the pole column 2, a slot 402 that mates with the insertion post 401 is provided on the busbar plate 3, and a solder coating 51 is provided on one side of the pole column 2 facing the busbar plate 3. Of course, the insertion post 401 and the slot 402 can also be arranged in the form of the above-mentioned second structure or third structure.

[0059] The sixth structure is as follows Figure 7 As shown, an insertion post 401 is provided on the pole column 2, a slot 402 that mates with the insertion post 401 is provided on the busbar plate 3, and a solder coating 51 is provided on one side of the busbar plate 3 facing the pole column 2. Of course, the insertion post 401 and the slot 402 can also be arranged in the form of the above-mentioned second structure or third structure.

[0060] The seventh structure is as follows Figure 8 As shown, an insertion post 401 is provided on the pole column 2, a slot 402 that mates with the insertion post 401 is provided on the busbar plate 3, a solder coating 51 is provided on one side of the pole column 2 facing the busbar plate 3, and a solder coating 51 is also provided on one side of the busbar plate 3 facing the pole column 2. Of course, the insertion post 401 and the slot 402 can also be arranged in the form of the above-mentioned second structure or third structure.

[0061] In the description of this specification, the descriptions referring to terms such as "some embodiments", "other embodiments", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0062] The above content is only the preferred embodiment of the present invention. For those of ordinary skill in the art, based on the idea of the present invention, there will be changes in the specific implementation manners and application scopes. The content of this specification should not be construed as a limitation to the present invention.

Claims

1. A cylindrical battery, characterized in that, Comprising: A housing (1), one end of the housing (1) being closed; A terminal post (2), the terminal post (2) being inserted through the closed end of the housing (1); A busbar plate (3), the busbar plate (3) being disposed within the housing (1) and being welded to the terminal post (2); wherein: One of the terminal post (2) and the busbar plate (3) has a slot (402), and the other of the terminal post (2) and the busbar plate (3) has a plug post (401), and the plug post (401) can be inserted into the slot (402); There is a filling solder (5) between the terminal post (2) and the busbar plate (3); A mating gap is provided between the plug post (401) and the slot (402), and the filling solder (5) is disposed within the mating gap; One side of the terminal post (2) facing the busbar plate (3) has a plurality of bifurcations (21), and a receiving groove (22) is defined between two adjacent bifurcations (21), and the receiving groove (22) is used for receiving the filling solder (5).

2. The cylindrical battery according to claim 1, wherein, The filling solder (5) includes a solder coating (51) provided on the terminal post (2) and / or the busbar plate (3).

3. The cylindrical battery according to any one of claims 1-2, characterized in that, The cross-section of the slot (402) is any one of circular, polygonal, and elliptical.

4. The cylindrical battery according to claim 3, characterized in that, The area of the cross-section of the slot (402) gradually decreases from the opening towards the bottom.

5. The cylindrical battery according to any one of claims 1-2, characterized in that, The depth of the slot (402) is H, and H satisfies the relationship: H≥0.2 mm.

6. The cylindrical battery according to any one of claims 1-2, characterized in that, The slots (402) are provided in a plurality at intervals, and the number of the plug posts (401) is less than or equal to the number of the slots (402).

7. The cylindrical battery according to any one of claims 1-2, characterized in that The cylindrical battery further includes an insulating member (6), the insulating member (6) being sleeved on the terminal post (2) and being inserted through the housing (1).

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