CN218867344U - Battery with a battery cell - Google Patents

Abstract

The utility model provides a battery, include: a housing assembly having a receiving cavity; the battery cell comprises a battery cell body and a lug, the battery cell body is arranged in the accommodating cavity, an accommodating space is defined between the battery cell body and the shell assembly, and the lug is bent to form a first connecting part; the feed-through assembly penetrates through the shell assembly to be connected with the battery cell and an external electric device; the utmost point ear connecting plate, utmost point ear connecting plate are located accommodation space, and utmost point ear connecting plate is including the second somatic part, second transition portion and the second connecting portion of buckling the connection, and second somatic part is connected with the subassembly electricity of feeding through, and the second connecting portion is connected with first connecting portion electricity, and second somatic part and second connecting portion are connected to the second transition portion, and the second transition portion is equipped with the structure weak part, and the structural strength and the rigidity of the structure weak part are less than the structural strength and the rigidity of other positions of utmost point ear connecting plate. According to the utility model discloses a battery can reduce the risk that utmost point ear connecting plate is broken, has also avoided causing the damage to electric core.

Description

Battery with a battery cell

Technical Field

The utility model relates to an energy storage technical field especially relates to a battery.

Background

In the production process of the battery, the tab connecting plate is generally required to be utilized to electrically connect the battery core and the feed-through assembly, for example, the tab of the battery core and the tab connecting plate are welded together, then the battery core is placed into a shell, the tab connecting plate is required to be synchronously bent in the shell placing process, and the tab connecting plate is ensured to be just hidden in the shell after the shell placing process. But at the in-process of bending of utmost point ear connecting plate, because utmost point ear connecting plate has certain intensity and rigidity, in addition the casing is little with electric core fit clearance, the problem of the fracture of utmost point ear connecting plate because of bending great lead to or even damage electric core often can appear.

SUMMERY OF THE UTILITY MODEL

In view of the above problem, the utility model provides a battery is through setting up the structural weakness portion that structural strength and rigidity are lower on utmost point ear connecting plate to carry out the technology of bending from the structural weakness portion, can avoid utmost point ear connecting plate to be broken.

The utility model provides a battery, include: a housing assembly having a receiving cavity; the battery cell comprises a battery cell body and a lug, the battery cell body is arranged in the accommodating cavity, an accommodating space is defined between the battery cell body and the shell assembly, the lug is positioned in the accommodating space, and the lug is bent to form a first connecting part; the feed-through assembly penetrates through the shell assembly to connect the battery cell and an external electric device; the lug connecting plate is located in the accommodating space and comprises a second body part, a second transition part and a second connecting part which are connected in a bending mode, the second body part is electrically connected with the feed-through assembly, the second connecting part is electrically connected with the first connecting part, the second transition part is connected with the second body part and the second connecting part, the second transition part is provided with a structural weak part, and the structural strength and the rigidity of the structural weak part are lower than those of other parts of the lug connecting plate.

According to the utility model discloses a battery, through set up the structure weak part that structural strength and rigidity are lower on utmost point ear connecting plate, when bending the technology to utmost point ear connecting plate from the structure weak part position, can reduce the risk that utmost point ear connecting plate was broken, reduce the technology degree of difficulty, in addition, the fracture department that has also avoided utmost point ear connecting plate causes the damage to electric core.

In some embodiments, the tab further includes a first body portion and a first transition portion, the first body portion is connected to the cell body, two ends of the first transition portion are respectively connected to the first body portion and the first connection portion, one of the first transition portion and the second transition portion is located at the top of the accommodating space, and the other one is located at the bottom of the accommodating space.

Optionally, the first connection portion and the second connection portion are overlapped in a thickness direction of the first connection portion.

Optionally, the height of the bent tab connection plate is lower than the thickness of the battery core.

Optionally, partial structures of the second body portion and the second connection portion in the height direction are bent along the first direction and toward one side of the battery core together, so as to reduce the height of the tab connection plate.

In some embodiments, the structural weakness is formed in at least one side edge of the second transition portion in the width direction and is formed by the edge being recessed inwardly in the width direction of the second transition portion.

In some embodiments, the structural weakness is formed by thinning at least one side wall of the second transition portion in the thickness direction.

Optionally, an included angle between the second connecting portion and the bottom wall of the housing assembly ranges from 70 ° to 110 °.

In some embodiments, a side wall of the housing assembly facing the tab is provided with a perforation, the feedthrough assembly comprising: the outer connecting plate is attached to the outer side wall of the shell assembly; the pole column penetrates through the through hole, one end of the pole column is connected with the outer connecting plate, an inner clamping head is arranged at the other end of the pole column, and the inner clamping head is clamped with the inner wall of the shell assembly; the second body part of the tab connecting plate is electrically connected with the pole.

Optionally, the feedthrough assembly further comprises: a first seal disposed between the outer connecting plate and the housing assembly; and/or a second seal disposed between the inner cartridge and the housing assembly.

In some embodiments, the second body portion of the tab connection plate is provided with a connection groove, and the inner cartridge is embedded in the connection groove.

Drawings

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

Fig. 1 is a cross-sectional view of one embodiment of a battery provided by the present invention;

fig. 2 is a cross-sectional view of another embodiment of a battery provided by the present invention;

fig. 3 is an exploded view of the battery according to the above embodiment of the present invention;

fig. 4 is an exploded view of a part of the structure of the battery according to the above embodiment of the present invention;

fig. 5 is a schematic structural view of an embodiment of a tab connection plate provided by the present invention;

fig. 6 is a schematic structural view of another embodiment of a tab connection plate provided by the present invention;

fig. 7 is a schematic structural view of a tab connection plate according to another embodiment of the present invention;

fig. 8 is a cross-sectional view of a feedthrough assembly provided by the present disclosure;

fig. 9 is a cross-sectional view of still other embodiments of a battery provided by the present invention.

Description of the reference numerals:

100-a battery;

1-a housing assembly; 11-a housing body; 12-a cover plate; 13-a containment space;

2-electric core;

21-cell body; 22-a tab; 221-a first body portion; 222-a first transition; 223-a first connection;

3-a tab connection plate;

31-a second body portion; 311-feed-through connection region; 312 — a first transition zone; 313-a first inflection zone; 314-a connecting trough;

32-a second transition; 321-structural weakness;

33-a second connecting portion; 331-a tab connection area; 332-a second transition zone; 333-a second bending zone;

4-a feedthrough assembly; 41-external connection board; 411-card slot; 42-pole; 421-inner clamping head; 422-outer clip; 43-a first seal; 44-second seal.

Detailed Description

In order to make the aforementioned objects, features and advantages of the embodiments of the present application more comprehensible, embodiments of the present application are described in detail below with reference to the accompanying drawings. It should be apparent that the described embodiments are only a few embodiments of the present application, and not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without any creative effort belong to the protection scope of the present application.

In the production process of battery, need utilize utmost point ear connecting plate to come electric core utmost point ear and feed through the subassembly and carry out the electricity and connect usually, for example weld electric core utmost point ear and utmost point ear connecting plate together earlier, then go into the shell, go into the shell in-process and need bend utmost point ear connecting plate in step, guarantee to go into behind the shell utmost point ear connecting plate and just hide in the casing. But at the in-process of bending of utmost point ear connecting plate, because utmost point ear connecting plate has certain intensity and rigidity, in addition the casing is little with electric core fit clearance, the problem of utmost point ear connecting plate fracture damage electric core even because of the great degree of bending that leads to of utmost point ear connecting plate often can appear.

In view of this, the utility model provides a battery is through setting up the structural weakness portion that structural strength and rigidity are lower on utmost point ear connecting plate to carry out the technology of bending from structural weakness portion position, can avoid utmost point ear connecting plate to be broken.

A battery 100 according to an embodiment of the present invention is described below with reference to fig. 1 to 9.

Referring to fig. 1 and 2, a battery 100 according to an embodiment of the present invention includes: the structure comprises a shell assembly 1, a feed-through assembly 4, a battery core 2 and a lug connecting plate 3.

Specifically, the housing assembly 1 may be square, i.e., the battery 100 is a square battery 100; alternatively, the housing assembly 1 may also be cylindrical, i.e. the battery 100 is a cylindrical battery 100. The housing assembly 1 defines a containing cavity, and the feed-through assembly 4 is arranged through a side wall of the housing assembly 1, that is, a part of the structure of the feed-through assembly 4 is located in the containing cavity, and another part of the structure is located outside the containing cavity, so that the feed-through assembly 4 can communicate the battery cell 2 with an external electric device.

The battery cell 2 may include a cell body 21 and a tab 22, and a receiving space 13 is defined between the cell body 21 and the casing assembly 1, for example, the receiving space 13 may be located on a side of the cell body 21 where the tab 22 is located, and the tab 22 is located in the receiving space 13. The tab 22 is subjected to a bending process to form the first connection part 223.

The tab connection plate 3 is positioned in the receiving space 13, and the tab connection plate 3 is subjected to a bending process to form a second body part 31, a second transition part 32, and a second connection part 33. Wherein, the second body portion 31 is provided with a connecting groove 314 electrically connected with the feed-through assembly 4, the second connecting portion 33 is located at a side of the second body portion 31 far away from the feed-through assembly 4, the second connecting portion 33 can be electrically connected with, e.g. welded to, the first connecting portion 223, two ends of the second transition portion 32 are respectively connected with the second body portion 31 and the second connecting portion 33, the second transition portion 32 is provided with a structural weak portion 321, and the structural strength and rigidity of the structural weak portion 321 are lower than those of other portions of the tab connecting plate 3. Like this, when carrying out the process of bending to the structure weak part 321 of utmost point ear connecting plate 3, because the intensity and the rigidity of structure weak part 321 all reduce, can use less external force to come the bending of utmost point ear connecting plate 3, simultaneously, utmost point ear connecting plate 3 is difficult to be broken, has also avoided the damage that the fracture trace of utmost point ear connecting plate 3 in the correlation technique led to the fact electric core 2.

According to the utility model discloses battery 100 through set up the lower structure weak part 321 of structural strength and rigidity on utmost point ear connecting plate 3, when bending the technology from structure weak part 321 position antipodal ear connecting plate 3, can reduce the risk that utmost point ear connecting plate 3 was broken, reduces the technology degree of difficulty, in addition, has also avoided the fracture department of utmost point ear connecting plate 3 to cause the damage to electric core 2.

It is to be understood that the first connection portion 223 and the second connection portion 33 described above may be formed through a one-time bending process.

In some embodiments, referring to fig. 1 and fig. 2, the tab 22 further includes a first body portion 221 and a first transition portion 222, wherein the first body portion 221 is connected to the cell body 21, the first connection portion 223 is located on a side of the first body portion 221 away from the cell body 21, and two ends of the first transition portion 222 are respectively connected to the first body portion 221 and the first connection portion 223. One of the first transition portion 222 and the second transition portion 32 is located at the top of the accommodating space 13, and the other is located at the bottom of the accommodating space 13. For example, the first transition portion 222 may be located at the top of the accommodating space 13, and the second transition portion 32 may be located at the bottom of the accommodating space 13, in which case, the tab 22 may be bent from top to bottom, and the tab connection plate 3 may be bent from bottom to top; or, the first transition portion 222 may be located at the bottom of the accommodating space 13, and the second transition portion 32 may be located at the top of the accommodating space 13, at this time, the tab 22 may be bent upward from below, and the tab connecting plate 3 may be bent downward from above, so that the first connecting portion 223 and the second connecting portion 33 formed after bending may be connected, and reliability of electrical connection may be improved.

Alternatively, referring to fig. 1 and 2, the first connection portion 223 and the second connection portion 33 are stacked in the thickness direction of the first connection portion 223, so that the contact area of the first connection portion 223 and the second connection portion 33 is larger, the reliability of the electrical connection can be improved, and the resistance after the connection is smaller, compared to a scheme of connecting the end portions of the first connection portion 223 and the second connection portion 33.

Optionally, referring to fig. 1 and fig. 2, the height of the tab connection plate 3 after bending is lower than the thickness of the cell body 21 of the cell 2, and correspondingly, the height of the tab 22 is also lower than the thickness of the cell body 21, for example, when the overall length of the tab connection plate 3 is relatively long, the second connection portion 33 after bending may be obliquely arranged, so as to reduce the overall height of the tab connection plate 3, so as to avoid that the overall thickness of the battery 100 is increased when the height of the tab connection plate 3 is too high, which is not beneficial to improving the space utilization rate and the energy density.

Alternatively, referring to fig. 2, the second body portion 31 and the second connection portion 33 are bent in the first direction and toward the battery cell 2 side together in a partial structure in the height direction to reduce the height of the tab connection plate 3. Because electric core 2 is less with casing subassembly 1 fit clearance to go into the shell in-process and still need bend utmost point ear 22 and utmost point ear connecting plate 3, can simplify the income shell requirement through the length that increases utmost point ear connecting plate 3 usually in the design process, at this moment, if only utmost point ear connecting plate 3 carries out the once technology of bending, can lead to utmost point ear connecting plate 3 to bend the back for the first time, highly still surpass the thickness of electric core body 21, consequently still need carry out the secondary to utmost point ear connecting plate 3 and bend.

Specifically, for example, as shown in fig. 2, after the tab connection plate 3 is subjected to a single bending process, the second body portion 31 and the second connection portion 33 both extend substantially in the vertical direction, the second transition portion 32 is also located at the top end of the second body portion 31 and the second connection portion 33, at this time, the portions of the second body portion 31 and the second connection portion 33 adjacent to the upper end may be bent in the horizontal direction and toward the cell body 21 side, at this time, the second transition portion 32 is changed from the original upward direction to the horizontal direction toward the cell body 21, and the second body portion 31 forms a feed-through connection region 311, a first transition region 312, and a first bending region 313, wherein the first transition region 312 connects the feed-through connection region 311 and the first bending region 313, and similarly, the second connection portion 33 forms a tab connection region 331, a second transition region 332, and a second bending region 333, wherein the second transition region 332 connects the tab connection region 331 and the second bending region 333.

Optionally, at least one of the first transition region 312 and the second transition region 332 may also be provided with a second structural weakness, for example, only the first transition region 312 may be provided with a second structural weakness, only the second transition region 332 may be provided with a second structural weakness, or both the first transition region 312 and the second transition region 332 may be provided with a second structural weakness. It will be appreciated that the structural strength and rigidity of the second structural weak portion is less than those of the rest of the second body portion 31 and the second connecting portion 33, so that the second body portion 31 or the second connecting portion 33 can be prevented from being broken when the tab connecting plate 3 is subjected to the secondary bending process.

In some embodiments, referring to fig. 6, the structural weakness 321 is formed at least one side edge of the second transition portion 32 in the width direction, in other words, the structural weakness 321 may be formed at one of the side edges of the second transition portion 32 in the width direction; alternatively, the second transition portion 32 is formed with a structural weakness 321 at both side edges thereof in the width direction. The structural weak portion 321 may be recessed inward from the edge along the width direction of the second transition portion 32 to form a groove, and the groove may be formed as a V-shaped groove or a U-shaped groove, so that the structural weak portion 321 is simple in structure and easy to process.

In still other embodiments, referring to fig. 7 and 8, the structural weakness 321 may be formed by thinning at least one side wall of the second transition 32 in the thickness direction. For example, as shown in fig. 7, the structural weak portion 321 may be formed by thinning only one side wall of the second transition portion 32 in the thickness direction. For example, as shown in fig. 8, the structural weak portion 321 may be formed by thinning both side walls of the second transition portion 32 in the thickness direction toward the middle, and after the thinning process, the thinned portion may be formed as a groove, and the groove penetrates through the side wall of the second transition portion 32 where the groove is located in the width direction of the tab connection plate 3, for example, the cross section of the groove may be formed as a V-shaped groove, or may be formed as a U-shape. Through the attenuate, can reduce the structural strength and the rigidity of structure weak part 321, simultaneously, simple structure, the handling ease.

Optionally, since the external force applied to the tab connecting plate 3 on both sides in the thickness direction is different during the bending process, where the side receiving the extrusion force is defined as the extrusion side and the side receiving the stretching force is defined as the stretching side, the second transition portion 32 may be configured such that the width of the structural weak portion 321 on the extrusion side is greater than the width of the structural weak portion 321 on the stretching side, and here, the width direction of the structural weak portion 321 is perpendicular to the width direction of the tab connecting plate 3, so that the tab connecting plate can be bent more easily and conveniently.

Optionally, referring to fig. 1 and fig. 2, the included angle between the second connecting portion 33 and the bottom wall of the housing assembly 1 is in a range of 70 ° to 110 °, for example, the included angle between the second connecting portion 33 and the bottom wall of the housing assembly 1 may be 70 °, 80 °, 90 °, 100 ° or 110 °, and the included angle between the second connecting portion 33 and the bottom wall of the housing assembly 1 may be reasonably selected within the above range according to the factors of the accommodating space 13, the height of the tab connecting plate 3, and the like, so as to ensure that the tab connecting plate 3 and the tab 22 can fill the accommodating space 13, and the connection is stable and reliable.

In some embodiments, referring to fig. 3, 4 and 5, the side wall of the housing assembly 1 opposite the tab 22 is provided with a perforation, and the feed-through assembly 4 may include: an outer connecting plate 41 and a pole 42. Wherein, the lateral wall of casing subassembly 1 can be located to outer connecting plate 41, outer connecting plate 41 can link to each other with outside power consumption device, utmost point post 42 wears to locate the perforation, utmost point post 42's one end links to each other with outer connecting plate 41, utmost point post 42's the other end is equipped with interior dop 421, interior dop 421 and casing subassembly 1's inner wall joint, second body portion 31 of utmost point ear connecting plate 3 is connected for example the welding with utmost point post 42 electricity, so, cooperation through outer connecting plate 41 and dop, feed-through assembly 4's setting is more stable, thereby battery 100 current transmission's reliability has been improved.

Optionally, referring to fig. 4, a slot 411 is formed on a side of the external connection board 41 facing away from the housing assembly 1, an external chuck 422 is disposed at an end of the terminal post 42 located outside the housing assembly 1, the external chuck 422 can be embedded into the slot 411, so that an outer surface of the external chuck 422 is flush with a side surface of the external connection board 41 facing away from the housing assembly 1, and thus, the external connection board 41 realizes stable installation on the housing assembly 1 through the terminal post 42, and meanwhile, connection between the terminal post 42 and the external connection board 41 is more reliable, which is beneficial to more stable current transmission of the battery 100, thereby improving reliability of the battery 100.

Optionally, with reference to fig. 3-5, feedthrough assembly 4 may further include: the first sealing member 43, the first sealing member 43 may be disposed between the outer connecting plate 41 and the housing assembly 1, so that the first sealing member 43 may improve the sealing performance at the perforated portion of the housing assembly 1 to prevent impurities from entering the housing assembly 1. Optionally, the feedthrough assembly 4 may further include a second sealing member 44, and the second sealing member 44 may be disposed between the inner clip 421 and the housing assembly 1, so that the second sealing member 44 may improve the sealing property inside the housing assembly 1, and better protect the circuit inside the housing assembly 1.

In some embodiments, referring to fig. 4, the second body portion 31 of the tab connection plate 3 is provided with the connection groove 314, and the inner cartridge 421 of the pole 42 may be embedded in the connection groove 314, and accordingly, as described above, if the tab connection plate 3 is subjected to the secondary bending process, the connection groove 314 may be provided in the feed-through connection region 311 of the second body portion 31. So for utmost point ear connecting plate 3 is more reliable and more stable with the cooperation of subassembly 4 of feeding through, and area of contact is bigger, and the contact resistance of subassembly 4 and the 3 junctions of utmost point ear connecting plate of feeding through is littleer, is favorable to promoting battery 100's comprehensive properties.

Alternatively, in some possible embodiments, referring to fig. 9, the tab 22 may be directly electrically connected to the feedthrough assembly 4, after the tab 22 is subjected to a bending process, a first body portion 221, a plurality of first connection portions 223 and a plurality of first transition portions 222 are formed, the plurality of first connection portions 223 are arranged at intervals along a direction from the tab 22 end of the cell 2 toward the housing assembly 1, the first body portion 221 is connected to the first connection portion 223 and any two adjacent first connection portions 223 through the first transition portions 222, and the first connection portion 223, which is farthest from the cell body 21, of the plurality of first connection portions 223 is electrically connected to the terminal 42 of the feedthrough assembly 4. Therefore, the lug connecting plate 3 is omitted, so that the assembly process is simpler and the cost is lower.

Alternatively, referring to fig. 3, the housing assembly 1 may include: shell body 11 and apron 12, wherein, shell body 11 prescribes a limit to the open-top chamber that holds, and the uncovered department that shell body 11 was located to apron 12 lid holds the chamber, and the subassembly 4 of feeding through can locate the preceding lateral wall of shell body 11, and accommodation space 13 is prescribed a limit to by the preceding lateral wall of electric core body 21 and shell body 11 jointly by electric core body 11, and accommodation space 13 is all located to utmost point ear 22 and utmost point ear connecting plate 3. Thus, the case has a simple structure, and can facilitate the assembly of the battery 100.

Optionally, the housing assembly 1 is made of metal, for example, the housing assembly 1 is made of a steel shell, so that the structural strength of the housing assembly 1 is higher, and the internal battery core 2 can be better protected.

Some specific embodiments of the battery 100 according to the present invention are described below.

Example one

Referring to fig. 1, 4 and 6, the battery 100 of the present embodiment includes: the structure comprises a shell assembly 1, a feed-through assembly 4, a battery core 2 and a lug connecting plate 3.

Wherein, casing assembly 1 includes casing body 11 and apron 12, and casing body 11 prescribes a limit to the open chamber that holds in top, and apron 12 lid is located the uncovered department of casing body 11 and is held the chamber with the closing cap, and the preceding lateral wall of casing is equipped with the perforation.

The feedthrough assembly 4 includes: an outer connecting plate 41, a pole 42, a first seal 43 and a second seal 44. Wherein, the lateral wall of shell body 11 is located to outer connecting plate 41, one side of outer connecting plate 41 dorsad shell body 11 is formed with draw-in groove 411, outer connecting plate 41 links to each other with outside consumer, utmost point post 42 wears to locate the perforation, utmost point post 42 is located the outer one end of casing subassembly 1 and is equipped with outer dop 422, utmost point post 42 is located the one end that holds the intracavity and is equipped with interior dop 421, outer dop 422 can imbed in draw-in groove 411, so that a lateral surface parallel and level of the surface of outer dop 422 and the dorsad casing subassembly 1 of outer connecting plate 41, first sealing member 43 is located between the surface of lateral wall before outer connecting plate 41 and shell body 11, second sealing member 44 is located between the preceding lateral wall internal surface of interior dop 421 and shell body 11.

The battery cell 2 comprises a battery cell body 21 and a tab 22, a containing space 13 is defined by the front end surface of the battery cell body 21 and the front side wall of the shell body 11, and the tab 22 is arranged at the front end of the battery cell 2 and is located in the containing space 13. After the tab 22 is subjected to a bending process, a first body part 221, a first transition part 222 and a first connection part 223 are formed, wherein the first body part 221 is connected with the cell body 21, the first connection part 223 is located on one side of the first body part 221, which is far away from the new body, and two ends of the first transition part 222 are respectively connected with the first body part 221 and the first connection part 223.

The tab connection plate 3 is located in the accommodation space 13, the tab connection plate 3 is subjected to a bending process to form a second body portion 31, a second transition portion 32 and a second connection portion 33, the second body portion 31 is provided with a connection groove 314, an inner clamping head 421 of the terminal 42 is embedded in the connection groove 314, the second connection portion 33 is located on one side of the second body portion 31 far away from the feed-through assembly 4, and the second connection portion 33 and the first connection portion 223 are overlapped and electrically connected in a thickness direction of the first connection portion 223. The angle between the second connecting portion 33 and the bottom wall of the housing assembly 1 ranges from 70 ° to 110 °.

The second transition portion 32 is provided with a structural weak portion 321, the structural weak portion 321 having a structural strength and a rigidity lower than those of other portions of the tab connection plate 3, the structural weak portion 321 being formed at least one side edge of the second transition portion 32 in the width direction, the structural weak portion 321 may be recessed inward from the edge in the width direction of the second transition portion 32 to form a groove, and the groove may be formed as a V-shaped groove.

Example two

Referring to fig. 1, 4 and 7, the battery 100 of the present embodiment includes: the structure comprises a shell assembly 1, a feed-through assembly 4, a battery core 2 and a lug connecting plate 3.

Wherein, casing subassembly 1 includes shell body 11 and apron 12, and shell body 11 limits the open chamber that holds in top, and apron 12 lid is located the uncovered department of shell body 11 and is held the chamber with the closing cap, and the preceding lateral wall of casing is equipped with the perforation.

The feedthrough assembly 4 includes: an outer connecting plate 41, a pole 42, a first seal 43 and a second seal 44. Wherein, the lateral wall of shell body 11 is located to outer connecting plate 41, one side of outer connecting plate 41 dorsad shell body 11 is formed with draw-in groove 411, outer connecting plate 41 links to each other with outside consumer, utmost point post 42 wears to locate the perforation, utmost point post 42 is located the outer one end of casing subassembly 1 and is equipped with outer dop 422, utmost point post 42 is located the one end that holds the intracavity and is equipped with interior dop 421, outer dop 422 can imbed in draw-in groove 411, so that a lateral surface parallel and level of the surface of outer dop 422 and the dorsad casing subassembly 1 of outer connecting plate 41, first sealing member 43 is located between the surface of lateral wall before outer connecting plate 41 and shell body 11, second sealing member 44 is located between the preceding lateral wall internal surface of interior dop 421 and shell body 11.

The battery cell 2 comprises a battery cell body 21 and a tab 22, a containing space 13 is defined by the front end surface of the battery cell body 21 and the front side wall of the shell body 11, and the tab 22 is arranged at the front end of the battery cell 2 and is located in the containing space 13. After the tab 22 is subjected to a bending process, a first body portion 221, a first transition portion 222 and a first connection portion 223 are formed, wherein the first body portion 221 is connected with the cell body 21, the first connection portion 223 is located on one side of the first body portion 221, which is far away from the new body, and two ends of the first transition portion 222 are respectively connected with the first body portion 221 and the first connection portion 223.

The tab connection plate 3 is located in the accommodation space 13, the tab connection plate 3 is subjected to a bending process to form a second body portion 31, a second transition portion 32 and a second connection portion 33, the second body portion 31 is provided with a connection groove 314, an inner clamping head 421 of the terminal 42 is embedded in the connection groove 314, the second connection portion 33 is located on one side of the second body portion 31 far away from the feed-through assembly 4, and the second connection portion 33 and the first connection portion 223 are stacked and electrically connected in a thickness direction of the first connection portion 223. The angle between the second connecting portion 33 and the bottom wall of the housing assembly 1 ranges from 70 ° to 110 °.

The second transition portion 32 is provided with a structural weak portion 321, the structural strength and rigidity of the structural weak portion 321 are lower than those of other portions of the tab connection plate 3, and the structural weak portion 321 may be formed by thinning only one side wall of the second transition portion 32 in the thickness direction.

EXAMPLE III

Referring to fig. 2, 4 and 6, the battery 100 of the present embodiment includes: casing subassembly 1, feed through subassembly 4, electric core 2 and utmost point ear connecting plate 3.

Wherein, casing subassembly 1 includes shell body 11 and apron 12, and shell body 11 limits the open chamber that holds in top, and apron 12 lid is located the uncovered department of shell body 11 and is held the chamber with the closing cap, and the preceding lateral wall of casing is equipped with the perforation.

The feedthrough assembly 4 includes: an outer connecting plate 41, a pole 42, a first seal 43 and a second seal 44. Wherein, the lateral wall of shell body 11 is located to outer connecting plate 41, one side of outer connecting plate 41 dorsad shell body 11 is formed with draw-in groove 411, outer connecting plate 41 links to each other with outside consumer, utmost point post 42 wears to locate the perforation, utmost point post 42 is located the outer one end of casing subassembly 1 and is equipped with outer dop 422, utmost point post 42 is located the one end that holds the intracavity and is equipped with interior dop 421, outer dop 422 can imbed in draw-in groove 411, so that a lateral surface parallel and level of the surface of outer dop 422 and the dorsad casing subassembly 1 of outer connecting plate 41, first sealing member 43 is located between the surface of lateral wall before outer connecting plate 41 and shell body 11, second sealing member 44 is located between the preceding lateral wall internal surface of interior dop 421 and shell body 11.

The battery cell 2 comprises a battery cell body 21 and a tab 22, a containing space 13 is defined by the front end surface of the battery cell body 21 and the front side wall of the shell body 11, and the tab 22 is arranged at the front end of the battery cell 2 and is located in the containing space 13. After the tab 22 is subjected to a bending process, a first body portion 221, a first transition portion 222 and a first connection portion 223 are formed, wherein the first body portion 221 is connected with the cell body 21, the first connection portion 223 is located on one side of the first body portion 221, which is far away from the new body, and two ends of the first transition portion 222 are respectively connected with the first body portion 221 and the first connection portion 223.

The tab connection plate 3 is located in the accommodation space 13, and the tab connection plate 3 is first subjected to a primary bending process to form a second body portion 31, a second transition portion 32 and a second connection portion 33, where the second connection portion 33 is located on one side of the second body portion 31 away from the feed-through assembly 4. Then, a secondary bending process is performed on the tab connection plate 3, specifically, the portions of the second body portion 31 and the second connection portion 33 adjacent to the upper ends thereof may be bent along the horizontal direction and toward one side of the cell body 21, at this time, the second transition portion 32 is changed from the original upward direction to the horizontal direction toward the cell body 21, and the second body portion 31 forms a feed-through connection region 311, a first transition region 312, and a first bending region 313, wherein the first transition region 312 connects the feed-through connection region 311 and the first bending region 313, and similarly, the second connection portion 33 forms a tab connection region 331, a second transition region 332, and a second bending region 333, wherein the second transition region 332 connects the tab connection region 331 and the second bending region 333, the feed-through connection region 311 is provided with a connection groove 314, an inner clamping head 421 of the terminal 42 is embedded in the connection groove 314, and the tab connection region 331 and the first connection portion 223 are stacked and electrically connected in the thickness direction of the first connection portion 223.

The second transition portion 32 is provided with a structural weak portion 321, the structural strength and rigidity of the structural weak portion 321 are lower than those of other portions of the tab connection plate 3, and the structural weak portion 321 may be formed by thinning only one side wall of the second transition portion 32 in the thickness direction.

In the fourth embodiment of the present invention, the following,

referring to fig. 9, the battery 100 of the present embodiment includes: housing assembly 1, feed-through assembly 4, and cell 2.

Wherein, casing subassembly 1 includes shell body 11 and apron 12, and shell body 11 limits the open chamber that holds in top, and apron 12 lid is located the uncovered department of shell body 11 and is held the chamber with the closing cap, and the preceding lateral wall of casing is equipped with the perforation.

The feedthrough assembly 4 includes: an outer connecting plate 41, a pole 42, a first seal 43 and a second seal 44. Wherein, the lateral wall of shell body 11 is located to external connection board 41, one side of external connection board 41 that is carried away from shell body 11 is formed with draw-in groove 411, external connection board 41 links to each other with outside electric installation, utmost point post 42 wears to locate the perforation, utmost point post 42 is located the outer one end of housing assembly 1 and is equipped with outer dop 422, utmost point post 42 is located the one end that holds the intracavity and is equipped with interior dop 421, outer dop 422 can imbed in draw-in groove 411, so that a lateral surface parallel and level of the surface of the external connection board 41 that is carried away from shell assembly 1 of external connection board 422, first sealing member 43 is located between the surface of lateral wall before external connection board 41 and shell body 11, second sealing member 44 is located between the preceding lateral wall internal surface of interior dop 421 and shell body 11.

The battery cell 2 comprises a battery cell body 21 and a tab 22, a containing space 13 is defined by the front end surface of the battery cell body 21 and the front side wall of the shell body 11, and the tab 22 is arranged at the front end of the battery cell 2 and is located in the containing space 13. The tab 22 is directly electrically connected with the pole 42, after the tab 22 is subjected to a bending process, a first body part 221, a plurality of first connection parts 223 and a plurality of first transition parts 222 are formed, the plurality of first connection parts 223 are arranged at intervals along a direction from the tab 22 end of the cell 2 toward the housing assembly 1, the first body part 221 is connected with the first connection part 223 and any two adjacent first connection parts 223 through the first transition parts 222, and the first connection part 223 which is farthest from the cell body 21 in the plurality of first connection parts 223 is electrically connected with the pole 42 of the feed-through assembly 4.

In the present specification, each embodiment or implementation mode is described in a progressive manner, and the emphasis of each embodiment is on the difference from other embodiments, and the same and similar parts between the embodiments may be referred to each other.

It should be noted that references in the specification to "one embodiment," "an example embodiment," "some embodiments," etc., indicate that the embodiment described may include a particular feature, structure, or characteristic, but every embodiment may not necessarily include the particular feature, structure, or characteristic. Moreover, such phrases are not necessarily referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is within the knowledge of one skilled in the art to effect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described.

In general, terminology should be understood, at least in part, by the use of the context. For example, the term "one or more" as used herein may be used to describe any feature, structure, or characteristic in the singular or may be used to describe a combination of features, structures, or characteristics in the plural, depending, at least in part, on the context. Similarly, terms such as "a" or "the" may also be understood to convey a singular use or to convey a plural use, depending at least in part on the context.

It should be readily understood that "on … …", "above … …" and "above … …" in this disclosure should be interpreted in the broadest manner such that "on … …" means not only "directly on something", but also "on something" with intermediate features or layers therebetween, and "above … …" or "above … …" includes not only the meaning of "above" or "above" something, but also the meaning of "above" or "above" without intermediate features or layers therebetween (i.e., directly on something).

Furthermore, spatially relative terms, such as "below," "lower," "above," "upper," and the like, may be used herein for ease of description to describe one element or feature's illustrated relationship to another element or feature. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

Claims (11)

1. A battery, comprising:

a housing assembly having a receiving cavity;

the battery cell comprises a battery cell body and a lug, the battery cell body is arranged in the accommodating cavity, an accommodating space is defined between the battery cell body and the shell assembly, the lug is positioned in the accommodating space, and the lug is bent to form a first connecting part;

the feed-through assembly penetrates through the shell assembly to connect the battery cell and an external electric device;

a tab connection plate located in the accommodation space, the tab connection plate including a second body portion, a second transition portion and a second connection portion, the second body portion being electrically connected to the feed-through assembly, the second connection portion being electrically connected to the first connection portion, the second transition portion connecting the second body portion and the second connection portion,

the second transition portion is provided with a structural weak portion, and the structural strength and rigidity of the structural weak portion are lower than those of other portions of the tab connecting plate.

2. The battery of claim 1, wherein the tab further comprises a first body part and a first transition part, the first body part is connected to the cell body, two ends of the first transition part are respectively connected to the first body part and the first connection part, and one of the first transition part and the second transition part is located at the top of the accommodating space, and the other one is located at the bottom of the accommodating space.

3. The battery according to claim 1, wherein the first connection portion and the second connection portion are stacked in a thickness direction of the first connection portion.

4. The battery of claim 1, wherein the height of the tab connecting plate after bending is lower than the thickness of the battery cell.

5. The battery of claim 4, wherein the second body part and the second connecting part are partially folded in the height direction along the first direction and toward the cell side to reduce the height of the tab connecting plate.

6. The cell defined in any one of claims 1-5, wherein the structural weakness is formed in at least one side edge of the second transition in the width direction and is formed by the edge being recessed inwardly in the width direction of the second transition.

7. The cell defined in any one of claims 1-5, wherein the structural weakness is formed by thinning at least one side wall of the second transition portion in the thickness direction.

8. The battery of any of claims 1-5, wherein the angle between the second connecting portion and the bottom wall of the housing assembly ranges from 70 ° to 110 °.

9. The battery of any of claims 1-5, wherein a sidewall of the housing assembly facing the tab is provided with a perforation, the feedthrough assembly comprising:

the outer connecting plate is attached to the outer side wall of the shell assembly;

the pole column penetrates through the through hole, one end of the pole column is connected with the outer connecting plate, an inner clamping head is arranged at the other end of the pole column, and the inner clamping head is clamped with the inner wall of the shell assembly;

the second body part of the tab connecting plate is electrically connected with the pole.

10. The battery of claim 9, wherein the feedthrough assembly further comprises:

a first seal disposed between the outer connecting plate and the housing assembly; and/or the presence of a gas in the atmosphere,

a second seal disposed between the inner cartridge and the housing assembly.

11. The battery as claimed in claim 9, wherein the second body portion of the tab connection plate is provided with a connection groove, and the inner cartridge is fitted into the connection groove.

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