CN217405568U

CN217405568U - Cylindrical battery pack

Info

Publication number: CN217405568U
Application number: CN202123106907.0U
Authority: CN
Inventors: 林巨杏; 赵金龙; 王劲航
Original assignee: LEXEL BATTERY (SHENZHEN) CO Ltd
Current assignee: LEXEL BATTERY (SHENZHEN) CO Ltd
Priority date: 2021-12-10
Filing date: 2021-12-10
Publication date: 2022-09-09
Anticipated expiration: 2031-12-10

Abstract

The embodiment of the utility model discloses a cylindrical battery pack, which comprises battery units which are stacked in the sleeve in the same direction, wherein the battery units are columnar, and one end surface of each battery unit is provided with a convex battery cap; an insulating pad is sleeved on the battery cap, and a through hole is formed in the middle of the insulating pad and is used for exposing the battery cap. By adopting the utility model, the columnar battery units are stacked in the sleeve, and simultaneously, one end surface of the battery unit is provided with the convex battery cap, and the orientations of all the battery units are the same, so that the upper plane and the lower plane of the battery unit are both leveled by adopting the mode of sleeving the insulating pad on the battery cap, thereby facilitating the stacking of the battery units; this kind of mode has only adopted a battery unit, has realized the effect of piling up a plurality of battery units together steadily, reduces the use kind of battery unit, effectively reduces manufacturing, the operation cost of battery unit.

Description

Cylindrical battery pack

Technical Field

The utility model relates to a group battery technical field especially relates to a group battery of cylinder type.

Background

Batteries are often used in hard light flashlights where nickel metal hydride batteries are more commonly used in hard light flashlights due to their environmental and economic advantages. The battery pack is usually stacked in a cylindrical shape, i.e. a plurality of single batteries are stacked together to increase the voltage of the battery pack, so as to meet the voltage requirement of flashlights and the like, and achieve the required working voltage (the common size is about 32-33mm in outer diameter, and the height is about 180 mm). For example, when the battery pack is produced, 5D-type nickel-hydrogen batteries are serially connected into a cylinder, and because the height of the battery pack is limited, 4 flat-head batteries and 1 pointed-head battery are generally adopted during production for the convenience of assembly of the battery pack and simultaneously meeting the requirements of voltage and height size, and the pointed-head batteries are positioned at the end part of the battery pack and protrude from the pointed head of the battery pack; however, the battery with two shapes can be used in the mode, so that the material types and the inventory of the battery are increased, and the operation cost of battery pack production and manufacturing is increased.

Disclosure of Invention

The utility model aims to provide a: the cylindrical battery pack only using one battery is provided, aiming at the problem that the cylindrical battery pack in the prior art uses batteries with two shapes and increases the production and operation cost.

In order to realize the purpose of the utility model, the utility model provides a following technical scheme:

a cylindrical battery pack comprises battery units which are stacked in a sleeve in the same direction, wherein each battery unit is columnar, and one end face of each battery unit is provided with a convex battery cap; an insulating pad is sleeved on the battery cap, and a through hole is formed in the middle of the insulating pad and is used for exposing the battery cap.

According to the technical scheme, the cylindrical battery units are stacked in the sleeve, meanwhile, one end face of each battery unit is provided with the convex battery cap, and the directions of all the battery units are the same, so that the insulating pad is sleeved on the battery cap, the upper plane and the lower plane of each battery unit tend to be flat, and the battery units are conveniently stacked; this kind of mode has only adopted a battery unit, has realized the effect of piling up a plurality of battery units together steadily, reduces the use kind of battery unit, effectively reduces manufacturing, the operation cost of battery unit.

Furthermore, the insulating pad is annular, and the through hole in the middle of the insulating pad is in clearance connection with the battery cap. The annular insulating pad is convenient to process and regular in shape; the clearance connection makes the battery cap and the through hole in the middle of the insulating pad convenient to mount and dismount, and the relative positions of the battery cap and the insulating pad can be adjusted as required.

Furthermore, the upper plane and the lower plane of the insulating pad are both provided with double faced adhesive tapes. By arranging the double faced adhesive tapes on the upper plane and the lower plane of the insulating pad, the insulating pad can be directly fixed on the two battery units through the double faced adhesive tapes in the using process, and the two battery units are firmly bonded together, so that the bonding mode is simple and quick, the structure of the whole battery pack can be more stable, and the deformation is difficult to occur; other adhesive with strong viscosity and stable performance can be adopted.

Further, the diameter of the insulating mat is not larger than the battery cell. Certain restriction is done to the diameter of insulating pad, and the radial dimension of reducible installation back group battery does benefit to the volume that reduces the group battery, reduces the occupation of battery group to space, makes things convenient for the group battery to install and use, increases the application scene of group battery simultaneously.

Further, the thickness of the insulating pad is not higher than the battery cap. When the thickness of insulating pad is not higher than the battery block, the terminal surface of insulating pad is higher than in the top of battery block promptly, perhaps the top of battery block flushes with the terminal surface of insulating pad, when directly piling up battery unit this moment, the battery block can be directly through butt intercommunication adjacent battery unit, and then realizes the series connection of battery unit.

Further, at the abutting position of any two adjacent battery units, one end of the conductive belt is welded on the battery cap of one battery unit, and the other end of the conductive belt is welded on the other battery unit. Through the arrangement of the conductive belt, one end of the conductive belt is welded on the battery cap, the other end of the conductive belt is welded on the other battery unit adjacent to the battery cap, the adjacent battery units are communicated, the series connection of the battery units is realized, and the problem that the series connection fails due to the gap generated between the battery units caused by the sudden increase of the axial distance of the battery units is solved; in particular, when the top of the cap for the battery is lower than the end surface of the insulating mat, the conductive tape should be welded.

Further, the conductive tape is a nickel tape. The nickel has good conductivity and convenient welding, and in addition, a nickel-copper composite piece can also be used as a conductive belt.

Further, the insulating pad is made of silicone. The insulating pad is made of insulating materials, such as silica gel, plastics and the like; the battery pack has the advantages that the silica gel is adopted, has certain elasticity, can deform to a certain extent when impacted, can protect the battery unit, and improves the stability of the battery pack.

Furthermore, five battery units are arranged in the sleeve, the battery cap of one battery unit positioned at the end part is exposed and is not sleeved with an insulating pad, and the battery caps of the other four battery units in the sleeve are provided with insulating pads. When the battery unit is assembled in the sleeve, only four battery units below are provided with the insulating pads; for the battery unit positioned at the top of the battery pack, the insulating pad is not arranged, and the battery unit is directly connected with electric workpieces such as a flashlight and the like through the battery cap of the battery unit at the top.

Further, the sleeve is made of PVC. The casing is made of PVC, so that the manufacturing is convenient, and the cost control is facilitated; and the sleeve pipe of PVC material also satisfies insulating requirement.

Implement the embodiment of the utility model provides a, will have following beneficial effect:

by adopting the technical scheme, the columnar battery units are stacked in the sleeve, and meanwhile, one end face of each battery unit is provided with the convex battery cap, and the directions of all the battery units are the same, so that the upper plane and the lower plane of each battery unit tend to be flat by sleeving the insulating pads on the battery caps, and the battery units are conveniently stacked; this kind of mode has only adopted a battery unit, has realized the effect of piling up a plurality of battery units together steadily, reduces the use kind of battery unit, effectively reduces manufacturing, the operation cost of battery unit.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the description below are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Wherein:

fig. 1 is a schematic diagram showing the stacking of battery cells of a cylindrical battery pack in one embodiment.

Fig. 2 is a schematic diagram of the connection of any two adjacent battery cells in one embodiment.

FIG. 3 is a schematic view of an embodiment of an insulating pad.

In the figure:

1. a battery cell; 2. a battery cap; 3. an insulating pad; 4. a conductive tape.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.

Referring to fig. 1 to 3, in the battery pack structure diagram of one embodiment, a cylindrical battery pack includes battery cells 1 stacked in a casing in the same direction, the battery cells 1 having a cylindrical shape and having a battery cap 2 protruding outward at one end surface; an insulating pad 3 is sleeved on the battery cap 2, and a through hole is formed in the middle of the insulating pad 3 and is used for exposing the battery cap 2.

The columnar battery units 1 are stacked in the sleeve, meanwhile, one end face of each battery unit 1 is provided with a convex battery cover cap 2, and the directions of all the battery units 1 are the same, so that the upper plane and the lower plane of each battery unit 1 tend to be flat by sleeving the insulating pads 3 on the battery cover caps 2, and the battery units 1 can be conveniently stacked;

in this way, only one battery unit 1 is adopted, the effect of stably stacking a plurality of battery units 1 is realized, the use types of the battery units 1 are reduced, and the manufacturing and operating costs of the battery units 1 are effectively reduced.

As shown in fig. 3, the insulating pad 3 is preferably ring-shaped, and the through hole in the middle of the insulating pad 3 and the battery cap 2 are in clearance connection.

The annular insulating pad 3 is convenient to process and regular in shape;

the clearance connection makes the through-hole in the middle of the battery cap 2 and the insulating pad 3 convenient to install and dismantle, and the relative position of the battery cap and the insulating pad can be adjusted according to the requirement.

As shown in fig. 1 and 3, preferably, the insulating pad 3 is provided with double-sided adhesive on both upper and lower planes.

By arranging the double faced adhesive tapes on the upper plane and the lower plane of the insulating pad 3, the insulating pad 3 can be directly fixed on the two battery units 1 through the double faced adhesive tapes in the use process, and the two battery units 1 are firmly bonded together, so that the bonding mode is simple and rapid, the structure of the whole battery pack is more stable, and the deformation is not easy to occur; the adhesive also can adopt other adhesive with strong viscosity and stable performance.

Preferably, the diameter of the insulating mat 3 is not greater than the battery cell 1.

Certain restriction is made to the diameter of insulating pad 3, and the radial dimension of reducible installation back group battery does benefit to the volume that reduces the group battery, reduces the occupation in group battery right space, makes things convenient for group battery installation to use, increases the application scene of group battery simultaneously.

Fig. 1 shows a battery cell stack diagram of a cylindrical battery pack in one embodiment, and as can be seen from fig. 1, in this embodiment, it is preferable that the insulating mat 3 has a thickness not higher than that of the battery cap 2.

When the thickness of insulating pad 3 is not higher than battery cap 2, the top of battery cap 2 exceeds the terminal surface of insulating pad 3 promptly, or the top of battery cap 2 flushes with the terminal surface of insulating pad 3, when directly piling up battery unit 1 this moment, battery cap 2 can be directly through butt intercommunication adjacent battery unit 1, and then realizes the series connection of battery unit 1.

As shown in fig. 2, in the schematic connection diagram of any two adjacent battery units in the present embodiment, preferably, at the abutting position of any two adjacent battery units 1, one end of the conductive strip 4 is welded to the battery cap 2 of one battery unit 1, and the other end of the conductive strip 4 is welded to the other battery unit 1.

Through the arrangement of the conductive belt 4, one end of the conductive belt 4 is welded on the battery cap 2, and the other end of the conductive belt 4 is welded on the other battery unit 1 adjacent to the battery cap 2 to communicate with the adjacent battery units 1, so that the series connection of the battery units 1 is realized, and the problem of series connection failure caused by the gap generated between the battery units 1 due to the sudden increase of the axial distance of the battery units 1 is solved;

in particular, when the top of the battery cap 2 is lower than the end surface of the insulating mat 3, the conductive tape 4 should be welded.

Preferably, the conductive strip 4 is a nickel strip.

The nickel has good conductivity and is convenient to weld, and in addition, a nickel-copper composite piece can be used as the conductive belt 4.

Preferably, the insulating pad 3 is made of silicone.

The insulating pad 3 is made of insulating material, such as silica gel and plastic; the battery pack adopts silica gel, the silica gel has certain elasticity, can deform to a certain extent when impacted, and can protect the battery unit 1, namely, the stability of the battery pack is improved.

Preferably, five battery units 1 are arranged in the sleeve, a battery cap 2 of one battery unit 1 positioned at the end part is exposed and is not sleeved with an insulating pad 3, and the battery caps 2 of the other four battery units 1 in the sleeve are all provided with the insulating pads 3.

When the battery units 1 are assembled into the sleeve, only four lower battery units 1 are provided with the insulating pads 3;

for the battery unit 1 positioned at the top of the battery pack, the insulating pad 3 is not installed, and the battery cap 2 of the battery unit 1 at the top is directly connected with electric workpieces such as a flashlight and the like.

Preferably, the sleeve is made of PVC.

The casing is made of PVC, so that the manufacturing is convenient, and the cost control is facilitated; and the sleeve made of the PVC material also meets the requirement of insulation.

Specifically, in the application of a battery pack, the battery unit 1 mentioned in the present application is a pointed battery, the battery unit 1 is a battery commonly used in the industry, the battery in a regular columnar shape is a flat-head battery, the flat-head battery is a special-shaped battery, the production difficulty of the flat-head battery is large, the use scenes are few, and if the flat-head batteries are not matched, bad cost is easily caused.

The utility model discloses a battery unit 1 combines together with insulating pad 3 for battery unit 1 can assemble like the flat head battery, has improved the equipment convenience of insulating pad 3, the battery unit 1 combination, therefore makes the utility model discloses a group battery only uses the voltage that battery unit 1 of a type can reach the demand, has reduced the production degree of difficulty of raw and other materials, has reduced the waste of raw and other materials, has reduced the manufacturing cost of group battery promptly, does benefit to the mass production of group battery, and in addition, this kind of group battery equipment is convenient, and the packaging efficiency is high.

Referring to fig. 1, which shows a battery cell stack of a cylindrical battery pack in one embodiment, when assembling, the insulating pad 3 and the battery cell 1 may be fixed, and since the insulating pad 3 is provided with a double-sided tape, the insulating pad 3 may be adhered to the battery cell 1 by the double-sided tape;

after the insulating pad 3 and the battery unit 1 are fixed into an assembly, the assembly is connected together through a conductive belt 4, namely two adjacent assemblies (the assembly is a set formed by the fixed insulating pad 3 and the battery unit 1) are placed together, one end of the assembly provided with the insulating pad 3 is set as the top end of the assembly, and the other opposite end of the assembly is set as the bottom end;

through the welded mode for the one end welding of conducting strip 4 is on the battery lid 2 of a subassembly, welds the other end of conducting strip 4 on the bottom or the cambered surface of another subassembly:

the specific welding position is determined according to the requirement, namely the conductive belt 4 can be welded at the bottom of the component and also can be welded on the circumferential arc surface of the component, and when the conductive belt is welded on the arc surface, 2-position welding bulges of the battery caps of the two components can be reduced, so that the length of the whole battery pack can be reduced;

when the thickness of the insulating pad 3 is slightly higher than that of the battery cap 2, when the conductive belt 4 is welded on the battery cap 2, the height of the welding position is controlled below the end face of the insulating pad 3 as much as possible, so that the situation that when two battery components are stacked, two battery units 1 are placed unstably due to the welding bulge of the middle battery cap 2 or are pressed strongly due to point contact is generated, and the battery units 1 are damaged is avoided;

as shown in fig. 2, in this embodiment, one end of the conductive band 4 is welded to the side surface of the battery unit 1, and the welding portion of the adjacent battery unit 1 is not arranged on the contact surface of the adjacent component, so that damage to the battery assembly is reduced, and the diameter of the sleeve can be set at the same time, so that the diameter of the sleeve is directly slightly larger than that of the battery assembly, thereby facilitating the installation of the battery assembly, and reducing scratches and scratches on the welding portion of the side surface of the battery assembly.

The adjacent components are welded and connected together one by the conductive strips 4:

at the moment, the welding part of the conductive belt 4 can be pretreated, the sharp part of the welding part is removed, and the welding part can be smooth in a polishing mode, so that the battery components are protected, the point contact among the battery components and between the battery components and the sleeve is prevented, and the phenomenon of overlarge local stress is avoided;

pack the subassembly into the sleeve in proper order to compress tightly the subassembly, make not produce between each battery unit 1 and insulating pad 3 and rock the back, through setting up chucking spare at the both ends of subassembly, with the axial chucking of whole group battery, guaranteed concatenating of group battery simultaneously, realized the increase of voltage, in order to satisfy the requirement of each work piece to great voltage of group battery, longer live time.

Furthermore, it is preferable that the height of the battery cap 2 of the battery unit 1 and the thickness of the insulating mat 3 are made similar:

the height of the battery cap 2 is close to the thickness of the insulating pad 3, so that the insulating pad 3 can supplement and close one end of the battery cap 2 of the battery unit 1 to be flush, and the height of the whole battery pack is not increased as much as possible, so that the volume of the whole battery pack is reduced as much as possible, the battery pack can use the same battery unit 1, and the structure is stable;

in addition, based on the principle that the height of the whole battery pack is not influenced as much as possible, the actual situation of series connection among the plurality of battery units 1 is judged, so that based on the selection of the series connection mode among the battery units 1, the height of the battery cap 2 and the thickness of the insulating pad 3 are determined to be high or low.

When the height of the battery cap 2 is larger than the thickness of the insulating pad 3, the battery units 1 can be directly abutted and connected in series through the battery cap 2;

when the height of the battery cap 2 is not greater than the thickness of the insulating mat 3, the battery cap 2 at the top of the lower battery cell 1 may be connected to the bottom of the upper battery cell 1 by means of an external lead.

The scope of the present invention is defined not by the above-described embodiments but by the appended claims and equivalents thereof.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, which is defined by the appended claims. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A cylindrical battery pack is characterized by comprising battery units which are stacked in the same direction in a sleeve, wherein each battery unit is columnar, and one end face of each battery unit is provided with a convex battery cap; the battery cap is sleeved with an insulating pad, and a through hole is formed in the middle of the insulating pad and is used for exposing the battery cap.

2. The cylindrical battery pack as set forth in claim 1, wherein the insulating gasket has a ring shape, and the through-hole formed in the middle of the insulating gasket is in gap-contact with the cap for the battery.

3. The cylindrical battery pack according to claim 2, wherein the insulating pad is provided with double-sided adhesive on both upper and lower surfaces thereof.

4. The cylindrical battery pack according to claim 2, wherein the insulating mat has a diameter not greater than that of the battery cell.

5. The cylindrical battery pack according to claim 1, wherein the insulating gasket has a thickness not higher than that of the battery cap.

6. The cylindrical battery pack as set forth in claim 1, wherein one end of the conductive strip is welded to the cap of one of the battery cells at the abutment of any two adjacent battery cells, and the other end of the conductive strip is welded to the other battery cell.

7. The cylindrical battery pack according to claim 6, wherein the conductive tape is a nickel tape.

8. The cylindrical battery pack according to claim 1, wherein the insulating gasket is made of silicon gel.

9. The cylindrical battery pack according to claim 1, wherein five battery cells are disposed in the sleeve, the battery cap of one battery cell at the end is exposed and not covered with the insulating pad, and the insulating pads are disposed on the battery caps of the other four battery cells in the sleeve.

10. The cylindrical battery pack according to claim 1, wherein the sleeve is made of PVC.