CN217641689U

CN217641689U - Battery with a battery cell

Info

Publication number: CN217641689U
Application number: CN202221624739.6U
Authority: CN
Inventors: 黄汉川
Original assignee: Xiamen Haichen New Energy Technology Co Ltd
Current assignee: Xiamen Hithium Energy Storage Technology Co Ltd
Priority date: 2022-06-27
Filing date: 2022-06-27
Publication date: 2022-10-21
Anticipated expiration: 2032-06-27

Abstract

The utility model discloses a battery, battery includes: casing, apron, utmost point post and roll core assembly, the casing is injectd and is held the chamber, and the one end that holds the chamber is opened, is formed with first hole on the apron, and roll core assembly locates and holds the intracavity. The pole is arranged at the first hole in a penetrating way, and a second hole is formed on the pole. From this, form the second hole on utmost point post, can be convenient for outside soldered connection stretch into the downthehole welding that realizes utmost point post and roll up core assembly of second, set up the switching piece between utmost point post and roll up core assembly among the prior art relatively, and all need weld alone between switching piece and utmost point post and the roll up core assembly, and welding efficiency is low, set up the flow that welding process can be simplified in the second hole, so that utmost point post and roll up core assembly and be connected, improve the efficiency of battery assembly, in order through reducing the inside resistance of battery, realize the promotion of battery energy efficiency.

Description

Battery with a battery cell

Technical Field

The utility model belongs to the technical field of the battery technique and specifically relates to a battery is related to.

Background

Among the prior art, be equipped with the switching piece between negative pole utmost point post and current collecting disc or roll up the core, all need weld between switching piece and the utmost point post, between switching piece and the roll core, increase the manufacturing procedure of battery, assembly efficiency is low. And the hem of casing is stopped to support at the top surface of apron after apron and casing assembly, and sealed effect is unsatisfactory, and the stability of apron installation is lower.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, an object of the present invention is to provide a battery, which can increase the installation efficiency and improve the sealing performance of the battery.

According to the utility model discloses battery, include: casing, apron, utmost point post and roll core assembly, the casing is injectd and is held the chamber, the one end that holds the chamber is opened, the apron is established hold the chamber one end, be formed with first hole on the apron, roll core assembly locates first downthehole. The pole is arranged at the first hole in a penetrating mode, the pole is connected with the winding core assembly in a welding mode, and a second hole is formed in the pole.

According to the utility model discloses a battery, form the second hole on utmost point post, can be so that outside soldered connection stretches into the second downthehole welding of realizing utmost point post and roll up core assembly, set up the switching piece between utmost point post and roll core assembly among the relative prior art, and all need weld alone between switching piece and utmost point post and the roll core assembly, and welding efficiency is low, set up the flow that welding process can be simplified in the second hole, so that utmost point post and roll core assembly are connected, improve the efficiency of battery assembly, so as to through reducing the inside resistance of battery, realize the promotion of battery energy efficiency.

In some embodiments, the second hole is a blind hole, and the second hole is formed by recessing one end of the pole far away from the accommodating cavity towards the direction of the accommodating cavity.

In some embodiments, a distance between an end surface of the terminal post adjacent to one end of the accommodating cavity and the bottom surface of the second hole is t, where t satisfies: t is more than or equal to 0.5mm and less than or equal to 5mm.

In some embodiments, the battery comprises: and the sealing nail is in threaded connection with the second hole.

In some embodiments, a sealant is further disposed in the second hole, and the sealant is disposed on the bottom surface.

In some embodiments, the core assembly comprises: roll up core, current collection dish is established roll up the neighbouring of core one side of utmost point post is followed the length direction of casing, utmost point post is in orthographic projection on the current collection dish is located current collection dish's center, just utmost point post ends to current collection dish, the second hole is used for welded connection current collection dish with utmost point post.

In some embodiments, the terminal post is provided with a flux at one end adjacent to the roll core assembly, and the roll core assembly and the terminal post are connected by welding with the flux.

In some embodiments, a groove is formed on the cover plate, the one end of the shell is provided with a folded edge, the folded edge is positioned in the groove, and two inner walls of the groove are abutted against the folded edge.

In some embodiments, the hem comprises: the buckle is formed by bending the edge of the folded edge towards the center of the shell.

In some embodiments, the groove is formed at an outer circumferential surface of the cap plate and extends in a circumferential direction of the cap plate.

In some embodiments, the cover plate is formed with a sealing groove located at a side of the groove adjacent to the receiving cavity, and a first sealing member is disposed in the sealing groove to seal a gap between the cover plate and the housing.

In some embodiments, one end of the pole located in the accommodating cavity is provided with a stopping part, and a second sealing member is arranged between the stopping part and the cover plate.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic diagram of a battery according to an embodiment of the present invention.

Fig. 2 is a schematic view of a pole according to an embodiment of the present invention.

Fig. 3 is a schematic view of a cover plate according to an embodiment of the present invention.

Fig. 4 is a schematic view of a housing according to an embodiment of the invention.

Reference numerals:

a battery 100;

a housing 10; a housing chamber 11; folding edges 12; a buckle 121; an open mouth 13;

a cover plate 20; a first hole 21; a groove 22; a seal groove 23;

a pole 30; a second hole 31; a stopper portion 32; a sealant 33;

a core assembly 40; a winding core 41; a collector plate 42; a positive collector plate 421; an anode current collecting plate 422;

a first seal 50; a second seal 60.

Detailed Description

Embodiments of the present invention are described in detail below, the embodiments described with reference to the drawings are exemplary, and a battery 100 according to an embodiment of the present invention is described below with reference to fig. 1 to 4, the battery 100 including: the casing 10, the cover plate 20 and the pole 30.

Specifically, as shown in fig. 1 to 4, the housing 10 defines a receiving cavity 11, and one end of the receiving cavity 11 is open, so as to form an open opening 13, the cover plate 20 is disposed at the end of the receiving cavity 11 where the open opening 13 is disposed, and the cover plate 20 cooperates with the open opening 13 to close the receiving cavity 11. The cover plate 20 is provided with a first hole 21, the winding core assembly 40 is arranged in the accommodating cavity 11, and the pole 30 is arranged at the first hole 21 from one side of the cover plate 20 adjacent to the winding core assembly 40 in a penetrating manner to realize the matching of the pole 30 and the cover plate 20. The pole 30 is formed with a second hole 31 for facilitating welding, and the pole 30 and the winding core assembly 40 are connected by welding through the second hole 31. For example, a welding head for welding may be inserted into the second hole 31 to weld the pole 30 to the jellyroll assembly 40 by a penetration welding technique.

According to the utility model discloses a battery 100, form second hole 31 on utmost point post 30, can be convenient for outside soldered connection stretch into the second hole 31 in realize the welding to utmost point post 30 and roll up core assembly 40, set up the switching piece between utmost point post 30 and roll up core assembly 40 among the relative prior art, and all need weld alone between switching piece and utmost point post 30 and the roll up core assembly 40, and welding efficiency is low, set up the flow that welding process can be simplified to second hole 31, so that utmost point post 30 is connected with roll up core assembly 40, improve the efficiency of battery 100 assembly, so as through reducing the inside resistance of battery 100, realize the promotion of battery 100 energy efficiency.

Further, as shown in fig. 2, the second hole 31 is a blind hole, and the second hole 31 is formed by recessing an end of the pole 30 away from the accommodating cavity 11 toward the accommodating cavity 11. That is, the second hole 31 is formed at an end of the post 30 away from the center of the battery 100, and the second hole 31 is not communicated with the accommodation chamber 11. From this, second hole 31 can realize that utmost point post 30 is close to the one end attenuate processing of rolling up core assembly 40, helps the welding between utmost point post 30 and the rolling up core assembly 40, and can effectively guarantee welded effect, avoids appearing the condition of rosin joint.

In some embodiments, the distance between the end surface of the terminal post 30 adjacent to the end of the accommodating cavity 11 and the bottom surface of the second hole 31 along the length direction of the housing 10 is t, where t satisfies: t is more than or equal to 0.5mm and less than or equal to 5mm. From this, prescribe a limit to the distance between the terminal surface through the one end of neighbouring chamber 11 that holds of utmost point post 30 and the bottom surface in second hole 31, be favorable to increasing welded reliability when welding utmost point post 30 and roll up core assembly 40, simultaneously, avoid the less stability that leads to welding the bottom surface and reduce battery 100 that leads to of thickness, perhaps avoid the great welding effect that leads to of thickness unsatisfactory, the welding stability between utmost point post 30 and the roll core assembly 40 reduces.

In some embodiments, battery 100 further comprises a sealing nail (not shown), which can be engaged with second hole 31 by means of a threaded connection. For example, the internal screw thread can be equipped with on the internal perisporium in second hole 31, can be equipped with the external screw thread on the sealed nail, and sealed nail and second hole 31 can realize the sealed to second hole 31 through internal screw thread and external screw thread fit after the welding, and can improve utmost point post 30's structural strength.

Optionally, a sealant 33 is further disposed in the second hole 31, the bottom surface of the second hole 31 may be provided with the sealant 33, and the sealant 33 may be coated on the bottom surface of the second hole 31 by brushing, so as to increase the sealing performance of the battery 100.

According to some embodiments of the present invention, in conjunction with fig. 1, the roll core assembly 40 includes: the collecting disc 42 is arranged on one side, close to the pole 30, of the winding core 41, the positive projection of the pole 30 on the collecting disc 42 is located at the center of the collecting disc 42 along the length direction of the shell 10, the pole 30 abuts against the collecting disc 42, and the collecting disc 42 is connected with the pole 30 through the second hole 31 in a welding mode. The current collecting disc 42 and the winding core assembly 40 can be pre-installed and then placed in the accommodating cavity 11, wherein the current collecting disc 42 can include a positive current collecting disc 421 and a negative current collecting disc 422, the positive current collecting disc 421 and the negative current collecting disc 422 are respectively arranged at two ends of the winding core 41, and the negative current collecting disc 422 is arranged between the pole 30 and the winding core 41. When the pole 30 is welded with the winding core assembly 40, the connection between the pole 30 and the winding core assembly 40 is realized by welding the pole 30 and the negative current collecting plate 422, so that the battery 100 can realize charging and discharging.

Thereby, the current collecting plate 42 is welded with the pole 30, and the second hole 31 contributes to improving the welding effect, so that the welding strength is improved. The winding core assembly 40 can be pre-installed and then placed in the accommodating cavity 11, so that the assembly efficiency of the battery 100 is increased, the second hole 31 formed in the pole 30 can facilitate the welding of the pole 30 and the current collecting disc 42, the conduction between the pole 30 and the winding core 41 can be realized, and the assembly process flow of the battery 100 can be simplified.

In some embodiments, the end of the post 30 adjacent the core assembly 40 is provided with flux (not shown), and the core assembly 40 and post 30 are joined by flux welding. It will be appreciated that the current collecting plate 42 can be avoided between the terminal post 30 and the winding core assembly 40, and flux can be applied to the terminal post 30 adjacent to the winding core 41, and the terminal post 30 and the winding core 41 can be welded by placing the two ends of the battery 100 on a heating system (not shown). The soldering flux can be paste without fluidity, and is convenient for welding and positioning, so that the welding effect is better. The flux can also be applied to the end of the winding core 41 adjacent to the pole 30. Heating system includes the heating ring, and the both ends of heating ring are connected with exchanging anodal and exchanging the negative pole electricity respectively, and for the convenience of realizing the heating welding better, heating system's heating power is P, and wherein, P satisfies: p is more than or equal to 0.001KW and less than or equal to 2KW; the heating system heating ring diameter may be r, where r satisfies: r is more than or equal to 5mm and less than or equal to 200mm; the heating time is t, wherein t satisfies: t is more than or equal to 0.001min and less than or equal to 1min. Through the injecture to heating power, heating ring diameter and heat time to make heating system have stable heating power, heat time, heating ring diameter scope can be accurate for the welding position provides the heat, realizes accurate heating, can avoid the heat not enough to cause the welding not firm on the one hand, and on the other hand can avoid overheated the damage that causes battery 100, reduces battery 100's life.

From this, through set up the scaling powder between utmost point post 30 and roll core assembly 40 to make the welding between utmost point post 30 and the roll core 41 more firm, reduce rosin joint battery 100 structure simultaneously simpler, can effectively reduce battery 100 internal resistance, improve energy efficiency.

Optionally, when the current collecting discs 42 are arranged at two ends of the winding core 41, the flux is arranged on one side of the current collecting disc 42 away from the center of the accommodating cavity 11 or one end of the pole 30 adjacent to the current collecting disc 42, so that the welding stability between the pole 30 and the current collecting disc 42 can be increased, and the welding position connection is firmer.

In some embodiments, referring to fig. 3 and 4, a groove 22 is formed on the cover plate 20, one end of the housing 10 has a folded edge 12, that is, a portion of the edge of the side of the housing 10 provided with the open opening 13, which is far away from the center of the housing 10, is configured as the folded edge 12, and the folded edge 12 is located in the groove 22, and two inner walls in the width direction of the groove 22 and the folded edge 12 are stopped against each other. For example, when the winding core assembly 40 is placed in the accommodating cavity 11, the folded edge 12 may be bent toward the center of the accommodating cavity 11 to achieve the fit with the groove 22, and the folded edge 12 and the shell 10 having the folded edge 12 may have certain elasticity, so that the folded edge 12 and the groove 22 are in interference fit to achieve the sealing of the accommodating cavity 11. Thus, a groove 22 is formed on the cover plate 20 to cooperate with the flange 12 provided on the case 10 to form a seal against the battery 100, and the groove 22 can limit the movement of the flange 12 in the axial direction of the battery 100, thereby increasing the structural stability of the battery 100.

Optionally, referring to fig. 4, the flange 12 further includes a buckle 121, and the buckle 121 is formed by bending the edge of the flange 12 toward the center of the housing 10. Thus, the coupling of the case 10 and the cover plate 20 is achieved by the engagement of the snaps 121 with the grooves 22, and the snaps 121 can increase the friction force of the tabs 12 in the grooves 22, so that the reliability of the coupling of the tabs 12 with the grooves 22 is increased, and the assembly efficiency of the battery 100 is high due to the simple structure.

According to some embodiments of the present invention, the groove 22 is formed on the outer circumferential surface of the cover plate 20 and extends along the circumferential direction of the cover plate 20. In other words, the cover plate 20 is disposed opposite to the housing 10 in the radial direction of the cover plate 20, and the groove 22 is formed on the outer circumferential surface of the cover plate 20 opposite to the housing 10 and can extend in the circumferential direction of the cover plate 20. Thereby, the groove 22 extends along the circumferential direction of the cover plate 20, and the folded edge 12 can be matched with the groove 22 along the circumferential direction of the cover plate 20, so that the connection between the cover plate 20 and the shell 10 is more tight and airtight.

In some embodiments, as shown in fig. 1 and 3, a sealing groove 23 is formed on the cover plate 20, the sealing groove 23 is located on one side of the groove 22 adjacent to the accommodating chamber 11, and a first sealing element 50 is arranged in the sealing groove 23 to seal a gap between the cover plate 20 and the housing 10. The sealing groove 23 may extend along the circumferential direction of the cover plate 20 and is provided at a side of the groove 22 adjacent to the receiving cavity 11. A first sealing element 50 may be disposed in the sealing groove 23, and when the flange 12 is engaged with the groove 22, the flange 12 may press the first sealing element 50 to seal between the housing 10 and the cover plate 20, and at the same time, the first sealing element 50 may press the flange 12 to make the engagement between the flange 12 and the groove 22 tighter.

Accordingly, the sealing groove 23 and the first seal 50 fitted into the sealing groove 23 are formed in the cap plate 20, and the first seal 50 can seal the gap between the cap plate 20 and the case 10, thereby increasing the sealing performance of the battery 100 and the structural reliability of the battery 100.

In some embodiments, one end of the terminal post 30 located in the accommodating cavity 11 has a stop portion 32, and in the axial direction of the battery 100, an orthographic area of the stop portion 32 on the cover plate 20 may be larger than an orthographic area of one end of the terminal post 30 far away from the stop portion 32 on the cover plate 20, and a second sealing member 60 is disposed between the stop portion 32 and the cover plate 20. The second sealing element 60 may be sleeved on the pole 30 and located between the stopping portion 32 and the cover plate 20, and when the pole 30 is installed, the pole 30 is then fitted with the first hole 21 of the cover plate 20 after the second sealing element 60 is fitted with the pole 30. The second sealing member 60 may achieve sealing of a gap between the cap plate 20 and the pole post 30. The second seal 60 and the first seal 50 may be made of rubber. Therefore, the design of the second sealing member 60 can increase the sealing performance between the pole 30 and the cover plate 20, and can avoid the hard contact between the stop part 32 and the cover plate 20 to have the effects of sealing, buffering and insulating.

Referring to fig. 1-4, the housing 10 is formed with a receiving cavity 11, one end of the housing 10 is open to form an open opening 13, the winding core assembly 40 is disposed in the receiving cavity 11, when the winding core assembly 40 includes a current collecting disc 42, the current collecting discs 42 are respectively disposed at two ends of the winding core 41, wherein, the positive current collecting disc 421 is disposed at the bottom of the housing 10, the negative current collecting disc 422 is disposed at one end of the winding core 41 adjacent to the open opening 13, the positive current collecting disc 421 and the housing 10 can be welded, the negative current collecting disc 422 can be welded to the post 30, the post 30 can be formed with a second hole 31, so as to achieve thinning of the bottom surface of the corresponding second hole 31 of the post 30, and facilitate welding of the post 30 and the winding core 41. Meanwhile, the end of the pole 30 adjacent to the current collecting plate 42 and the bottom of the housing 10 can be provided with flux to increase the reliability of soldering. Optionally, the flux may be directly disposed at the bottom of the case 10 and at an end of the pole 30 adjacent to the winding core 41, and the two ends of the battery 100 are electrically connected to the heating system to realize the welding between the winding core 41 and the case 10 and between the winding core 41 and the pole 30, so as to effectively avoid the problem of insufficient soldering, simplify the structure of the battery 100, and improve the energy efficiency of the battery 100.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

In the description of the present invention, "the first feature" and "the second feature" may include one or more of the features. In the description of the present invention, "a plurality" means two or more. In the description of the present invention, the first feature "on" or "under" the second feature may include the first and second features being in direct contact, and may also include the first and second features being in contact with each other not directly but through another feature therebetween. In the description of the invention, the first feature being "on", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery, comprising:

the shell defines a containing cavity, and one end of the containing cavity is open;

the cover plate is arranged at one end of the accommodating cavity, and a first hole is formed in the cover plate;

the winding core assembly is arranged in the accommodating cavity;

the pole column penetrates through the first hole, the pole column is connected with the winding core assembly in a welded mode, and a second hole is formed in the pole column.

2. The battery of claim 1, wherein the second hole is a blind hole, and the second hole is formed by the terminal far away from the accommodating cavity and is recessed towards the accommodating cavity.

3. The battery of claim 2, wherein a distance between an end surface of the terminal adjacent to the end of the accommodating cavity and the bottom surface of the second hole is t, wherein t satisfies: t is more than or equal to 0.5mm and less than or equal to 5mm.

4. The battery of claim 2, further comprising: and the sealing nail is in threaded connection with the second hole.

5. The battery of claim 3, wherein a sealant is further disposed in the second aperture, the sealant being disposed on the bottom surface.

6. The battery of claim 1, wherein the jelly roll assembly comprises:

a winding core;

the current collecting disc, the current collecting disc is established the neighbouring of book core one side of utmost point post is followed the length direction of casing, utmost point post is in orthographic projection on the current collecting disc is located the center of current collecting disc, just utmost point post ends to current collecting disc, the second hole is used for welded connection current collecting disc with utmost point post.

7. The battery of claim 1, wherein the terminal post is provided with a flux at an end adjacent to the roll core assembly, and the roll core assembly and the terminal post are connected by welding with the flux.

8. The battery of claim 1, wherein the cover plate has a groove formed therein, the one end of the case has a flange, the flange is located in the groove, and two inner walls of the groove abut against the flange.

9. The battery of claim 8, wherein the flap comprises: the buckle is formed by bending the edge of the folded edge towards the center of the shell.

10. The battery according to claim 8, wherein the groove is formed at an outer circumferential surface of the cap plate and extends in a circumferential direction of the cap plate.

11. The battery of claim 8, wherein the cover plate has a sealing groove formed therein, the sealing groove being located on a side of the groove adjacent to the receiving cavity, and a first sealing element is disposed in the sealing groove to seal a gap between the cover plate and the case.

12. The battery according to any one of claims 1-11, wherein one end of the post located in the receiving cavity has a stop portion, and a second sealing member is disposed between the stop portion and the cover plate.