CN215220904U

CN215220904U - Battery with a battery cell

Info

Publication number: CN215220904U
Application number: CN202121601518.2U
Authority: CN
Inventors: 杨强
Original assignee: Xiamen Haichen New Energy Technology Co Ltd
Current assignee: Xiamen Hithium Energy Storage Technology Co Ltd
Priority date: 2021-07-14
Filing date: 2021-07-14
Publication date: 2021-12-17
Anticipated expiration: 2031-07-14

Abstract

The utility model discloses a battery, include: casing, electric core, utmost point post, connection piece, casing include the top cap, and one side towards the casing center of top cap is formed with the holding tank, and electric core establishes in the casing, and electric core includes utmost point ear, and the top cap is worn to locate by utmost point post, and the connection piece is connected with utmost point ear including the first linkage segment and the second linkage segment of bending type connection, first linkage segment, and the second linkage segment is connected with utmost point post, and first linkage segment is located the holding tank. From this, through setting up the holding tank, can be convenient for reduce the occupation space of connection piece at the direction of height, and then can increase the space of the installation of the electric core in the casing, can increase the capacity of battery and the energy density of battery to make the battery have higher charge-discharge capacity.

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

In the prior art, the battery includes a battery core and a connecting plate, etc., a pole lug group connected to the battery core is connected to the connecting plate by welding, and the connecting plate is connected to a pole to form a passage. However, because the size specification of casing is standard, the space of the inside electric core of casing can be taken up to inside connecting plate, reduces the energy density of electric core, and to the great battery of size specification, when its inside utmost point ear and connecting piece need buckle the setting, the space of electric core installation is further compressed, influences the capacity and the use experience of battery, and the inside space utilization of top cap 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 has a large capacity of an electrical core.

According to the utility model discloses battery includes: casing, electric core, utmost point post, connection piece, the casing includes the top cap, the face of top cap one side at casing center is formed with the holding tank, electric core is established in the casing, electric core includes utmost point ear, utmost point post wears to locate the top cap, the connection piece is including the first linkage segment and the second linkage segment of buckling the connection, first linkage segment with utmost point ear is connected, the second linkage segment with utmost point post is connected, first linkage segment is located in the holding tank.

From this, through setting up the holding tank, and the holding tank forms in the one side of the top cap towards the casing center to make the holding tank can hold first linkage segment, like this, can be convenient for reduce the occupation space of the direction of height of connection piece, and then can increase the space of the installation of electric core in the casing, increase the capacity of battery and the energy density of battery, so that the battery has higher charge and discharge ability.

In some embodiments, the receiving groove is projected from a portion of the top cover toward a direction away from a center of the case to form a receiving portion.

In some embodiments, a side surface of the receiving portion away from the center of the housing is lower than a side surface of the pole away from the center of the housing.

Optionally, a side surface of the accommodating portion away from the center of the housing is flush with a side surface of the pole away from the center of the housing.

In some embodiments, the receiving groove is formed by a portion of a side surface of the top cover facing the center of the housing being recessed toward a direction away from the center of the housing.

In some embodiments, the depth of the accommodating groove is D, satisfying: d is more than 0 and less than or equal to 2 mm.

In some embodiments, a portion of the tab extends into the receiving slot.

In some embodiments, the second connection segment has a fuse, the battery further comprising: and the circuit protection piece is sleeved on the fusing part.

In some embodiments, the free end of the second connecting section is connected with the pole, and the fusing part is arranged at the other end of the second connecting section.

In some embodiments, the battery further comprises: the sealing nail penetrates through the top cover, and the connecting piece is provided with a notch for avoiding the sealing nail.

In some embodiments, the tab includes a positive tab and a negative tab, the connecting piece includes a positive connecting piece and a negative connecting piece, the first connecting section of the positive connecting piece is connected with the positive tab and the second connecting section is connected with the positive tab, and the first connecting section of the negative connecting piece is connected with the negative tab and the second connecting section is connected with the negative tab. The holding tank is a plurality of, and is a plurality of the holding tank interval sets up, and is a plurality of the degree of depth of holding tank equals.

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 cross-sectional view of a battery according to an embodiment of the present invention.

Fig. 3 is an enlarged view of the region P in fig. 2.

Fig. 4 is a schematic three-dimensional split view of a battery according to an embodiment of the present invention.

Fig. 5 is a schematic view of the top cover according to the embodiment of the present invention.

Fig. 6 is a schematic diagram of a positive electrode connection piece according to an embodiment of the present invention.

Reference numerals:

a battery 100;

a housing 10; a top cover 11; an accommodating groove 111; the first receiving groove 111 a; the second accommodation grooves 111 b; the third accommodation grooves 111 c; the fourth accommodation grooves 111 d; mounting holes 112; an upper cover plate 11 a; a lower cover plate 11 b; an open opening c;

a battery cell 20; a positive electrode tab 21; a negative electrode tab 22; a tab 23;

a pole 30; a positive electrode post 31; a negative electrode post 32;

a connecting sheet 40; a positive electrode connecting piece 41; a first connection section 411; a second connection section 412; a fusing part a; a notch b; a negative electrode connecting piece 42;

a circuit protector 50; a seal nail 60; an explosion-proof valve 70;

a first direction A; a second direction B.

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 6.

The battery 100 according to the embodiment of the present invention includes a housing 10, a battery cell 20, a terminal post 30, and a connecting sheet 40. Specifically, the casing 10 includes the top cover 11, one side of the top cover 11 facing the center of the casing 10 is formed with the accommodating groove 111, the battery cell 20 is arranged in the casing 10, the battery cell 20 includes the tab 23, the terminal 30 is arranged in the top cover 11, the connecting piece 40 includes the first connecting section 411 and the second connecting section 412 that are connected in a bending manner, the first connecting section 411 is connected with the tab 23, the second connecting section 412 is connected with the terminal 30, and the first connecting section 411 is located in the accommodating groove 111, so as to reduce the occupied space on the height (for example, the size in the second direction B as shown in fig. 2) of the connecting piece 40.

As shown in fig. 1 and 2, the case 10 may have an open opening c, the battery cell 20 is mounted inside the case 10, and the top cover 11 may be fitted with the open opening c, thereby forming a seal with the case 10. The top cover 11 is provided with a receiving groove 111 at a side close to the battery cell 20, and the first connecting section 411 can be received and mounted in the receiving groove 111. For example, the first connection section 411 and the second connection section 412 extend in parallel and in different directions, so that the two are respectively connected with the tab 23 and the pole 30, the battery cell 20 can be communicated with the first connection section 411 through the tab 23, and the pole 30 can penetrate through the top cover 11 and be connected with the second connection section 412, so that the battery cell 20, the tab 23, the connecting piece 40 and the pole 30 form a current path.

Therefore, the accommodating groove 111 for accommodating part of the connecting piece 40 is arranged on one side of the top cover 11 facing the battery cell 20, so that the occupied space of the connecting piece 40 in the height direction is reduced, the space for installing the battery cell 20 in the housing 10 can be increased, and the capacity of the battery 100 and the energy density of the battery 100 are increased, so that the battery 100 has higher charging and discharging capacity.

Alternatively, the receiving groove 111 is projected from a portion of the top cover 11 toward a direction away from the center of the housing 10 to form a receiving portion. For example, as shown in fig. 2 and 3, the top cover 11 may include an upper cover plate 11a and a lower cover plate 11b, where a portion of the top cover 11 protrudes away from the center of the housing 10 means that the lower cover plate 11b and a portion of the upper cover plate 11a, which is close to the cell 20 and is opposite to the first connection section 411, are formed with a receiving groove 111, a bottom of the receiving groove 111 faces upward (a side of the top cover 11 facing away from the cell 20) to form a protruding receiving portion, and the material of the lower cover plate 11b may be plastic.

Therefore, the accommodating groove 111 protrudes towards one side of the top cover 11, which is away from the battery cell 20, to form an accommodating part, so that the connecting sheet 40 and the tab 23 can be conveniently installed, and part of the connecting sheet 40 and the tab 23 can be located in the accommodating part, so that the occupied space of the connecting sheet 40 in the height direction is reduced.

For example, a side surface of the receiving portion away from the center of the housing 10 is lower than a side surface of the pole 30 away from the center of the housing 10. As shown in fig. 2, the surface of the side of the accommodating portion facing away from the battery cell 20 is lower than the surface of the side of the terminal post 30 facing away from the battery cell 20 in the second direction B, i.e., the height of the accommodating portion protruding on the top cover 11 is lower than the height of the terminal post 30 protruding out of the top cover 11. Therefore, the side of the accommodating part departing from the center of the shell 10 is lower than the side of the pole 30 departing from the center of the shell 10, so that the pole 30 is prevented from being in contact with an external element better in the process of charging and discharging the battery 100. Meanwhile, it can be ensured that the receiving portion can receive the first connection section 411 having a greater height in the second direction, and it can also be prevented that the receiving portion protrudes to occupy a space.

Alternatively, a surface of the receiving portion on a side away from the center of the housing 10 is flush with a surface of the pole 30 on a side away from the center of the housing 10. I.e. the receptacle projects on the side of the cover 11 facing away from the battery cell 20, by the same distance as the portion of the pole 30 projecting out of the cover 11. Therefore, the surface of the accommodating portion away from the center of the casing 10 and the surface of the terminal 30 away from the center of the casing 10 are flush, so that the connecting sheet 40 is mounted in the accommodating portion more, and the occupied space of the battery cell 20 in the height direction is further increased, which is beneficial to increasing the energy density of the battery cell 20. It is understood that the two setting manners may be specifically set according to actual requirements, and are not limited herein.

In other alternative embodiments, the receiving groove 111 is formed by a portion of a side surface of the top cover 11 facing the center of the housing 10 being recessed toward a direction away from the center of the housing 10 (not shown). For example, a surface of the receiving groove 111 on a side away from the center of the housing 10 is flush with a surface of the top cover 11 on a side away from the center of the housing 10, and a surface of the top cover 11 on a side away from the center of the housing 10 is a plane. The receiving groove 111 is disposed on a side of the lower cover plate 11b facing the housing 10, and is recessed from a side of the top cover 11 close to the housing 10 to a side away from the housing 10. The bottom of the receiving groove 111 (the portion of the receiving groove 111 farthest from the center of the housing 10) may approach or stop against the upper cover plate 11 a.

From this, one side that top cap 11 is close to casing 10 sets up holding tank 111, so that the holding tank 111 that forms can be protruding to one side that top cap 11 deviates from casing 10, so that holding tank 111 holds to connection piece 40, reduce the occupation of connection piece 40 to the space between top cap 11 and the casing 10, avoid holding tank 111 to upwards bulge top cap 11's outside, to the occupation of 11 exterior spaces of top cap, influence top cap 11's normal use, and simultaneously, can be convenient for process.

As shown in fig. 3, the depth of the accommodating groove 111 is D, and satisfies: d is more than 0 and less than or equal to 2 mm. From this, through the degree of depth of control holding tank 111, can make holding tank 111 can hold connection piece 40 better, increase the compactness of first connection section 411 and holding tank 111 bottom, the laminating of second connection piece 40 and top cap 11 to in better intercommunication utmost point post 30 and electric core 20, increase casing 10 inner space structure's compactness. Meanwhile, the accommodating groove 111 thus provided may reduce the height of one side of the top cover 11 facing the center of the case 10 by 0-2mm, so that the height of the battery cell 20 may be increased by 0-2mm accordingly to increase the overall capacity of the battery cell 20.

Specifically, as shown in fig. 3, a part of the tab 23 protrudes into the accommodation groove 111. The tab 23 is located on one side of the connecting sheet 40 close to the casing 10, one end of the tab 23 is welded to the connecting sheet 40, and the other end is connected to the battery cell 20, and the tab 23 and the connecting sheet 40 may be located in the accommodating groove 111 together.

Therefore, a part of the tab 23 extends into the receiving groove 111, so that the volume of the tab 23 between the top cover 11 and the casing 10 is reduced, the height of the battery cell 20 in the second direction B inside the casing 10 can be increased, and the energy density of the battery 100 can be improved. Of course, the battery 100 may further include a positive electrode protective sheet and a negative electrode protective sheet, and at least a portion of the positive electrode protective sheet and the negative electrode protective sheet may be located in the receiving groove 111.

In detail, as shown in fig. 4 and 6, the second connection segment 412 has a fusing part a, and the battery 100 further includes: the circuit protection member 50 is sleeved on the fusing part a, and the circuit protection member 50 is sleeved on the fusing part a. The connection tab 40 of the battery 100 may include a positive connection tab 41 and a negative connection tab 42, the fusing portion a may be provided on the positive connection tab 41, and the second connection section 412 may be provided with a portion of the fusing portion a having a smaller cross-sectional area than other portions of the second connection section 412. In the outside of fusing portion a, when electric core 20 short circuit, fusing portion a that takes place the fusing can form the slag, can establish circuit protection piece 50 at fusing portion a's outside cover to in collect the slag, circuit protection piece 50 can be the injection molding.

From this, locate the circuit protection piece 50 in the fusing portion a outside through set up fusing portion a and cover on second linkage segment 412 to avoid the circuit when the short circuit, increase the protection to the circuit, and the slag that produces when can effectively preventing the fusing drops, influences the connection of utmost point post 30 and electric core 20, increases the charge of battery 100, discharge capacity.

Alternatively, as shown in fig. 6, the free end of the second connection section 412 is connected with the pole 30, and the fusing part a is provided at the other end of the second connection section 412. That is, the second connection section 412 is closer to the battery cell 20 than the first connection section 411, one end of the second connection section 412 close to the pole 30 is a free end, the other end is connected with the first connection section 411, the first connection section 411 and the second connection section 412 can be integrally formed, and the fusing part a is formed at one end of the second connection section 412 close to the first connection section.

Therefore, the fusing part a is arranged on the second connecting section 412, so that when the battery 100 is in a short circuit, the second connecting section 412 can be fused in time, the current is prevented from flowing between the pole 30 and the battery core 20, the risk of the battery 100 in the short circuit is reduced, and the safety of the battery 100 is improved. Meanwhile, the fusing part a is spaced apart from the post 30, so that interference between the fusing part a and the post 30 can be prevented, and stability of the battery 100 is improved.

Optionally, as shown in fig. 5, an explosion-proof valve 70 is further disposed on the top cover 11, and a through hole with a long strip shape is disposed on the explosion-proof valve 70, so that when the battery 100 fails, pressure generated by explosion can be freely released, so that energy generated by explosion can be discharged, explosion of the battery 100 can be avoided, and safety of using the battery 100 can be increased.

Further, referring to fig. 4, the battery 100 further includes: the sealing nail 60, the sealing nail 60 can be worn to locate in the top cap 11, and the connecting piece 40 has the breach b of dodging the sealing nail 60.

The bottom of the accommodating groove 111 on the top cover 11 is provided with a mounting hole 112, the mounting hole 112 is arranged at one end of the accommodating groove 111 far away from the pole 30, the mounting hole 112 can be matched with the sealing nail 60, and the mounting hole 112 facilitates the injection of electrolyte from the outside to the inside of the battery 100. Since the first connecting section 411 of the connecting piece 40 is partially located in the receiving groove 111, an end of the first connecting section 411 close to the mounting hole 112 may be provided with a circular-arc-shaped notch b to enable the first connecting section to be fitted with the sealing nail 60.

From this, set up sealed nail 60 on top cap 11 to the messenger can with the mounting hole 112 adaptation on the top cap 11, increase the inside leakproofness of battery 100, simultaneously, can guarantee top cap 11 and connection piece 40's connection reliability, and the breach b that sets up on the connection piece 40, produce the interference with connection piece 40 when can avoiding sealed nail 60 to install, increase the convenience when sealed nail 60 and mounting hole 112 adapt to.

Specifically, the tab 23 may include a positive tab 21 and a negative tab 22, the terminal 30 may include a positive terminal 31 and a negative terminal 32, the connecting piece 40 includes a positive connecting piece 41 and a negative connecting piece 42, the first connecting section 411 of the positive connecting piece 41 is connected with the positive tab 21 and the second connecting section 412 is connected with the positive terminal 31, and the first connecting section 411 of the negative connecting piece 42 is connected with the negative tab 22 and the second connecting section 412 is connected with the negative terminal 32. The plurality of accommodating grooves 111 are provided, the plurality of accommodating grooves 111 are arranged at intervals, and the depth of the plurality of accommodating grooves 111 is equal.

As shown in fig. 4 to 6, the positive electrode tab 21 and the negative electrode tab 22, the positive electrode tab 31 and the negative electrode tab 32, and the positive electrode tab 41 and the negative electrode tab 42 are provided at intervals in the first direction a. The parts of the positive electrode tab 21 and the negative electrode tab 22 close to the top cover 11 and the parts of the positive electrode connecting piece 41 and the negative electrode connecting piece 42 close to the top cover 11 can all extend into the accommodating grooves 111 of the top cover 11, and the accommodating grooves 111 are arranged on the top cover 11 at intervals.

Alternatively, the receiving grooves 111 may be formed on both the upper cover plate 11a and the lower cover plate 11B, and the positions of the receiving grooves 111 on the upper cover plate 11a and the lower cover plate 11B are opposite to each other in the second direction B, and a partial section of the receiving groove 111 of the lower cover plate 11B may be located in the receiving groove 111 of the upper cover plate 11 a. At one end of the top cover 11, the receiving groove 111 formed on the lower cover plate 11b may be a first receiving groove 111a, and the receiving groove 111 formed on the upper cover plate 11a opposite thereto may be a second receiving groove 111 b; at the other end of the top cover 11, a third receiving groove 111c may be formed on the lower cover plate 11b, and a fourth receiving groove 111d may be formed on the upper cover plate 11a to be positioned opposite to the lower cover plate 11 b.

From this, through setting up connection piece 40, so that the first linkage segment 411 of connection piece 40 is connected with utmost point ear 23, second linkage segment 412 is connected with utmost point post 30, can communicate utmost point post 30 and electric core 20 and form the route of battery 100 charge-discharge, the same holding tank 111 setting of a plurality of depths, be convenient for place partial utmost point ear 23 and connection piece 40 in holding tank 111, increase the space that holds in the top cap 11 and the stability of being connected with connection piece 40, reduce the occupation to the space that top cap 11 and casing 10 are injectd, increase the capacity of electric core 20, improve the holistic energy density of 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", 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:

a housing including a top cover having a receiving groove formed at a side facing a center of the housing;

the battery cell is arranged in the shell and comprises a lug;

the pole column penetrates through the top cover;

the connecting piece, the connecting piece includes first linkage segment and the second linkage segment of buckling the connection, first linkage segment with utmost point ear is connected, the second linkage segment with utmost point post is connected, first linkage segment is located in the holding tank.

2. The battery of claim 1, wherein the receiving groove is projected from a portion of the top cover toward a direction away from a center of the case to form a receiving portion.

3. The battery according to claim 2, wherein a side surface of the receiving portion away from the case center is lower than a side surface of the terminal away from the case center; or

One side surface of the accommodating part far away from the center of the shell is flush with one side surface of the pole far away from the center of the shell.

4. The battery according to claim 1, wherein the receiving groove is formed by a portion of a side surface of the top cover facing the center of the case being recessed toward a direction away from the center of the case.

5. The battery of claim 1, wherein the receiving groove has a depth D that satisfies: d is more than 0 and less than or equal to 2 mm.

6. The battery of claim 1, wherein a portion of the tab extends into the receiving groove.

7. The battery of claim 1, wherein the second connection segment has a fuse;

the battery further includes: and the circuit protection piece is sleeved on the fusing part.

8. The battery of claim 7, wherein the free end of the second connecting section is connected to the terminal post, and the fusing portion is disposed at the other end of the second connecting section.

9. The battery of claim 1, further comprising:

the sealing nail penetrates through the top cover, and the connecting piece is provided with a notch for avoiding the sealing nail.

10. The battery of any one of claims 1-9, wherein the tabs comprise positive and negative tabs, the posts comprise positive and negative posts, the tabs comprise positive and negative tabs, the first and second connection sections of the positive tab are connected to the positive and negative tabs and the negative tab is connected to the negative and positive posts;

the holding tank is a plurality of, and is a plurality of the holding tank interval sets up, and is a plurality of the degree of depth of holding tank equals.