CN220341343U - Battery shell, battery and electric equipment - Google Patents

Abstract

The utility model belongs to the technical field of battery production and manufacturing, and particularly relates to a battery shell, a battery and electric equipment, wherein the battery shell comprises a shell body and a first top cover, the shell body is provided with first threads, the first top cover is an insulating top cover, the first top cover is provided with second threads, the first top cover is covered on the shell body, and the second threads are in threaded connection with the first threads; the first top cover and the shell are in threaded connection and sealing, the sealing structure is simple and detachable, the first top cover and the shell can be detached from each other very conveniently, and when one of the first top cover or the shell is damaged, the corresponding damaged piece can be detached and replaced; meanwhile, the first top cover is an insulating top cover, so that the first top cover can be directly connected with the shell in an insulating way without additionally arranging an insulating part for insulation, the insulating part between the first top cover and the shell is saved, and the production cost of the battery is reduced.

Description

Battery shell, battery and electric equipment

Technical Field

The utility model belongs to the technical field of battery production and manufacturing, and particularly relates to a battery shell, a battery and electric equipment.

Background

The lithium ion battery as a novel secondary battery has the advantages of high energy density and power density, high working voltage, light weight, small volume, long cycle life, good safety, environmental protection and the like, and has wide application prospect in the aspects of portable electric appliances, electric tools, large energy storage, electric traffic power sources and the like.

Currently, battery cases generally include a housing and a top cover that covers the housing. In order to ensure the connection tightness of the top cover and the shell and prevent electrolyte from overflowing or foreign matters from entering the battery, the top cover and the shell are usually fixedly connected by adopting a mechanical rolling sealing process (matched with a flexible sealing ring). In the manufacturing process of the cylindrical battery with the structure, the connecting process of the top cover and the battery shell is complex, the operation is inconvenient, the top cover and the battery shell are difficult to detach once the battery is assembled, and when one of the top cover and the battery shell is damaged, the other part is difficult to detach without damage for secondary use.

Disclosure of Invention

One of the objects of the present utility model is: aiming at the defects of the prior art, the battery shell is provided to solve the problems that in the prior art, the connecting process of the top cover and the battery shell is complex, the operation is inconvenient, and the top cover and the battery shell are difficult to detach once the battery is assembled.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the battery shell comprises a shell body and a first top cover, wherein the shell body is provided with first threads, the first top cover is an insulating top cover, the first top cover is provided with second threads, the first top cover is arranged on the shell body in a covering mode, and the second threads are in threaded connection with the first threads.

Preferably, the first top cover comprises a first base and a first connecting portion, the first connecting portion is arranged along the edge of the first base, the bottom of the first connecting portion extends to a direction away from the first connecting portion to form a first protruding portion, and the second thread is formed on the first protruding portion.

Preferably, both ends of the shell are open ports, the first thread is arranged at the open port at one end of the shell, a positioning ring is arranged at the edge of the open port at the other end of the shell, the bottom of the positioning ring extends to a direction away from the shell to form a second connecting portion, and the second connecting portion is in threaded connection with a second top cover.

Preferably, the second top cover comprises a second base and a third connecting portion, the third connecting portion is arranged along the edge of the second base, the bottom of the third connecting portion extends to a direction away from the second base to form a second protruding portion, the second protruding portion is provided with third threads, the outer side wall of the second connecting portion is provided with fourth threads, and the third threads are in threaded connection with the fourth threads.

Preferably, the first base and the second base are both provided with through holes, a pole is arranged in each through hole, and the pole is in threaded connection with each through hole.

Preferably, the first base and the second base are both provided with a first groove, the through hole is located in the first groove, a support portion is arranged at the edge of the upper end of the pole, and the support portion is located in the first groove.

Preferably, a thinning structure is arranged on the pole.

Preferably, one of the first base and the second base is provided with a liquid injection hole, and the liquid injection hole is in threaded connection with a sealing nail.

Another object of the utility model is: the battery comprises a battery core and a battery shell, wherein the battery shell is described in the specification, and the battery core is arranged in the shell.

Yet another object of the present utility model is: providing a powered device comprising a battery as described in the foregoing description.

The battery shell has the beneficial effects that through the matched use of the shell and the first top cover, the shell is provided with the first screw thread, the first top cover is provided with the second screw thread, the first top cover is installed on the shell through the first screw thread and the second screw thread in a screw thread connection mode, the installation of the first top cover and the shell is realized, the first top cover and the shell are sealed through screw thread connection, the sealing structure is simple and detachable, the first top cover and the shell can be detached from each other very conveniently, and when one of the first top cover or the shell is damaged, the corresponding damaged part can be removed and replaced. Meanwhile, the first top cover is an insulating top cover, so that the first top cover can be directly connected with the shell in an insulating way without additionally arranging an insulating part for insulation, the insulating part between the first top cover and the shell is saved, and the production cost of the battery is reduced.

Drawings

Features, advantages, and technical effects of exemplary embodiments of the present utility model will be described below with reference to the accompanying drawings.

Fig. 1 is a schematic view of the structure of a battery according to the present utility model.

Fig. 2 is an exploded view of the battery of the present utility model.

Fig. 3 is a schematic cross-sectional structure of the battery of the present utility model.

Fig. 4 is an enlarged schematic view of the structure at a in fig. 3.

Fig. 5 is a schematic view showing another cross-sectional structure of the battery of the present utility model.

Fig. 6 is an enlarged schematic view of the structure at B in fig. 5.

Wherein reference numerals are as follows:

100. a battery;

10. a battery case; 11. a housing; 111. a first thread; 12. a first top cover; 121. a first base; 122. a first connection portion; 123. a first boss; 124. a second thread; 13. a second top cover; 131. a second base; 132. a third connecting portion; 133. a third thread; 134. a second protruding portion; 14. a positioning ring; 141. a second connecting portion; 142. a fourth thread; 15. a through hole; 16. a pole; 161. a support part; 162. thinning the structure; 17. a first groove; 18. a liquid injection hole; 19. sealing nails;

20. a battery cell;

30. a current collector.

Detailed Description

Certain terms are used throughout the description and claims to refer to particular components. Those of skill in the art will appreciate that a hardware manufacturer may refer to the same component by different names. The description and claims do not take the form of an element differentiated by name, but rather by functionality. As used throughout the specification and claims, the word "comprise" is an open-ended term, and thus should be interpreted to mean "include, but not limited to. By "substantially" is meant that within an acceptable error range, a person skilled in the art can solve the technical problem within a certain error range, substantially achieving the technical effect.

Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

The present utility model will be described in further detail with reference to fig. 1 to 6, but the present utility model is not limited thereto.

The electric equipment comprises a battery 100. The electric equipment can be an automobile, a mobile phone, portable equipment, a notebook computer, a ship, a spacecraft, an electric toy, an electric tool and the like. The automobile can be a fuel oil automobile, a fuel gas automobile or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid electric automobile or a range-extended automobile and the like; spacecraft including airplanes, rockets, space planes, spacecraft, and the like; the electric toy includes fixed or mobile electric toys, such as a game machine, an electric car toy, an electric ship toy, and an electric airplane toy; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railroad power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete shakers, and electric planers, among others. The embodiment of the application does not limit the electric equipment in particular.

The number of the battery 100 may be one or a plurality of. If there are multiple batteries 100, the multiple batteries 100 may be connected in series or parallel or a series-parallel connection, where a series-parallel connection refers to that there are both series and parallel connection among the multiple batteries 100. The batteries 100 can be directly connected in series or in parallel or in series-parallel to form a whole; of course, a plurality of batteries 100 may be connected in series or in parallel or in series to form a battery 100 module, and then a plurality of battery 100 modules may be connected in series or in parallel or in series to form a whole.

Referring to fig. 1, a battery 100 according to an embodiment of the utility model includes a battery cell 20 and a battery case 10, wherein the battery cell 20 is disposed in the case.

Referring to fig. 1 to 4, a battery case 10 according to an embodiment of the present utility model includes a case 11 and a first top cover 12, wherein a first thread 111 is provided on an inner wall of the case 11, the first top cover 12 is an insulating top cover, a second thread 124 is provided on the first top cover 12, the first top cover 12 is provided on the case 11, and the second thread 124 is in threaded connection with the first thread 111.

Compared with the prior art, the battery case 10 of the embodiment of the utility model has the advantages that through the matched use of the shell 11 and the first top cover 12, the shell 11 is provided with the first screw thread 111, the outer side wall of the first connecting part 122 is provided with the second screw thread 124, the first top cover 12 is installed on the shell 11 through the screw thread connection of the first screw thread 111 and the second screw thread 124, the installation of the first top cover 12 and the shell 11 is realized, the first top cover 12 and the shell 11 are sealed through the screw thread connection, the sealing structure is simple and detachable, the installation or the detachment between the first top cover 12 and the shell 11 is convenient, the first top cover 12 and the shell 11 can be detached from each other conveniently, and when one of the first top cover 12 or the shell 11 is damaged, the corresponding damaged part can be detached for new replacement. Meanwhile, the first top cover 12 is an insulating top cover, so that the first top cover 12 can be directly connected with the shell 11 in an insulating manner without additionally arranging an insulating piece for insulation, the insulating piece between the first top cover 12 and the shell 11 is saved, and the production cost of the battery 100 is reduced.

In some embodiments, the first top cover 12 includes a first base 121 and a first connecting portion 122, the first connecting portion 122 is disposed along an edge of the first base 121, and a bottom of the first connecting portion 122 extends away from the first connecting portion 122 to form a first protruding portion 123, and the second thread 124 is formed on the first protruding portion 123. When the first top cover 12 is covered on the shell 11, the second threads 124 on the first protruding portion 123 are in threaded connection with the first threads 111 of the shell 11, so that the first top cover 12 and the shell 11 can be effectively mounted or dismounted conveniently, and when one of the first top cover 12 or the shell 11 is damaged, the corresponding damaged piece can be conveniently dismounted and replaced.

Referring to fig. 1 to 6, in some embodiments, two ends of the housing 11 are open, the first thread 111 is disposed at an open end of one end of the housing 11, a positioning ring 14 is disposed at an edge of the open end of the other end of the housing 11, a bottom of the positioning ring 14 extends away from the housing 11 to form a second connecting portion 141, and the second connecting portion 141 is in threaded connection with a second top cover 13. Through the setting that both ends of casing 11 are the open mouth, through first screw thread 111 and second screw thread 124 screw thread cooperation between first top cap 12 and the casing 11, second top cap 13 and second connecting portion 141 screw thread cooperation, effectively install first top cap 12 detachably in the open mouth of one end of casing 11, install second top cap 13 detachably in the open mouth of the other end of casing 11. The assembly of the battery shell 10 is effectively realized, the first top cover 12 and the second top cover 13 are respectively sealed with the shell 11 by adopting threaded connection, the sealing structure is simple and detachable, the battery shell 10 is convenient to install or detach, and the production efficiency of the battery 100 is further improved.

Specifically, the positioning ring 14 may be formed at the inner edge of the open mouth of the other end of the housing 11, or may be formed at the outer edge of the open mouth of the other end of the housing 11. When the positioning ring 14 is formed at the inner edge of the opening at the other end of the housing 11, the positioning ring 14 is used for abutting against the end face of the battery cell 20, so as to limit the battery cell 20.

Referring to fig. 6, in some embodiments, the second top cover 13 includes a second base 131 and a third connecting portion 132, the third connecting portion 132 is disposed along an edge of the second base 131, and a bottom of the third connecting portion 132 extends away from the second base 131 to form a second protruding portion 134, the second protruding portion 134 is provided with a third thread 133, the second connecting portion 141 is provided with a fourth thread 142, and the third thread 133 is in threaded connection with the fourth thread 142. Through the cooperation of the third screw thread 133 and the fourth screw thread 142, the third screw thread 133 is located at the second protruding portion 134 of the second top cover 13, the fourth screw thread 142 is located at the second connecting portion 141 of the housing 11, and when the second top cover 13 is covered on the housing 11, the third screw thread 133 and the fourth screw thread 142 are in screw thread cooperation, so that screw thread cooperation of the second top cover 13 and the housing 11 is effectively achieved.

As can be appreciated, the mounting structure of the first top cover 12, the second top cover 13, and the housing 11 has the following several kinds:

first, the first thread 111 and the fourth thread 142 are external threads, and the second thread 124 and the third thread 133 are internal threads; that is, the first top cover 12 and the second top cover 13 are both screwed with the external threads of the housing 11 by the internal threads.

Second, the second thread 124 and the third thread 133 are external threads, and the first thread 111 and the fourth thread 142 are internal threads; that is, the first top cover 12 and the second top cover 13 are both screwed with the internal threads of the housing 11 by external threads.

Third, the first thread 111 and the third thread 133 are external threads, and the second thread 124 and the fourth thread 142 are internal threads; that is, the first top cover 12 is screwed to the external screw of the housing 11 by the internal screw, and the second top cover 13 is screwed to the internal screw of the housing 11 by the external screw.

Fourth, both the second threads 124 and the fourth threads 142 are external threads; the first thread 111 and the third thread 133 are both internal threads; that is, the first top cover 12 is screwed to the internal thread of the housing 11 by the external thread, and the second top cover 13 is screwed to the external thread of the housing 11 by the internal thread.

Positive and negative lugs are respectively led out from two ends of the battery core 20 of the battery 100 and are correspondingly connected with corresponding positive and negative poles, wherein the stability of the connection of the lugs and the poles greatly influences the stability of the battery core 20 of the battery 100.

The inventor finds that the battery cell 20 is directly installed in the battery case 10, and that a certain movable space exists in the battery case 10 inside the battery cell 20, when the battery 100 vibrates or falls, the battery cell 20 easily moves up and down, so that the lugs at two ends of the battery cell 20 are easily damaged, and the reliability of the battery 100 is reduced due to poor contact between the lugs and the poles.

Therefore, in the battery case 10 of the embodiment of the present utility model, the first top cap 12 and the second top cap 13 are both screwed with the internal threads of the case 11 by external threads. When the first top cover 12 and the second top cover 13 are respectively covered on the shell 11, the first protruding portion 123 and the second protruding portion 134 are both positioned in the battery shell 10, the first protruding portion 123 is abutted against the end face of one end of the battery cell 20, the second protruding portion 134 is abutted against the end face of the other end of the battery cell 20, when the battery 100 shakes or falls, the first protruding portion 123 and the second protruding portion 134 cooperate to limit the battery cell 20, so that the lug at the end of the battery cell 20 is prevented from being damaged due to vertical movement of the battery cell 20, and the connection reliability of the lug and the pole is further affected.

In the battery case 10 according to another embodiment of the present utility model, the first top cap 12 is screw-coupled to the internal screw thread of one end of the case 11 by the external screw thread, the second top cap 13 is screw-coupled to the external screw thread of the other end of the case 11 by the internal screw thread, and the positioning ring 14 is formed at the inner edge of the opening of the other end of the case 11. When the first top cover 12 and the second top cover 13 are respectively covered on the shell 11, the first protruding portion 123 is located inside the battery shell 10, the second protruding portion 134 is located outside the battery shell 10, the first protruding portion 123 is abutted with the end face of one end of the battery cell 20, the positioning ring 14 is abutted with the end face of the other end of the battery cell 20, when the battery 100 shakes or falls, the first protruding portion 123 and the positioning ring 14 cooperate to limit the battery cell 20, the lug at the end of the battery cell 20 is prevented from being damaged due to vertical movement of the battery cell 20, and the reliability of connection between the lug and the pole is further affected.

It will be appreciated that the second cap 13 may also be an insulating cap. Through the setting of insulating top cap, insulating top cap can be directly with casing 11 insulating, need not to set up other insulating parts between insulating top cap and the casing 11 again, has saved insulating parts between insulating top cap and the casing 11 to battery 100's manufacturing cost has been reduced.

Referring to fig. 4 and 6, in some embodiments, the first base 121 and the second base 131 are each provided with a through hole 15, a pole 16 is disposed in the through hole 15, and the pole 16 is screwed with the through hole 15. Through the setting of through-hole 15, through-hole 15 sets up on first basal portion 121 and second basal portion 131, and through-hole 15 is used for installing utmost point post 16, through the threaded connection of utmost point post 16 and through-hole 15, has reduced the installation degree of difficulty of utmost point post 16 and first basal portion 121, second basal portion 131, and then has improved production efficiency.

The electrode post 16 is used for welding with the tab of the battery cell 20 or the current collector 30 of the battery 100, so as to electrically connect the electrode post 16 and the tab of the battery cell 20.

In some embodiments, the first base 121 and the second base 131 are each provided with a first groove 17, the through hole 15 is located in the first groove 17, the upper end edge of the pole 16 is provided with a support portion 161, and the support portion 161 is located in the first groove 17. When the pole 16 is mounted in the through hole 15, the pole 16 is effectively limited by the cooperation of the first groove 17 and the supporting portion 161, so that the pole 16 is prevented from falling into the battery 100.

In some embodiments, a thinned structure 162 is provided on the pole 16. Through the arrangement of the thinning structure 162, the thinning structure 162 is used for welding with the tab or the current collector 30 of the battery 100, and because the thickness of the thinning structure 162 is thinner, penetration welding can be adopted between the thinning structure 162 and the tab or the current collector 30 of the battery 100, so that the welding quality of the tab 16 and the tab or the current collector 30 of the battery cell 20 is ensured.

In some embodiments, one of the first base 121 and the second base 131 is provided with a filling hole 18, and the filling hole 18 is screwed with a sealing nail 19. Through the cooperation of annotating liquid hole 18 and sealing nail 19 and use, when battery 100 annotates the liquid, can be through annotating liquid hole 18 with the electrolyte injection battery 100 inside, realize annotating the liquid to battery 100, sealing nail 19 and annotate liquid hole 18 threaded connection, accessible threaded connection seals after the battery 100 annotates the liquid, makes things convenient for battery 100 follow-up to supply electrolyte, gets rid of battery 100 and produces waste gas, is favorable to improving circulation, the security performance of battery 100.

In some embodiments, the battery case 10 is provided with an explosion-proof valve or an explosion-proof score, which is ruptured to release gas inside the battery 100 when the battery 100 is thermally out-of-control, i.e., when the internal pressure of the battery 100 reaches a threshold value, to prevent explosion of the battery 100 after the thermal out-of-control, thereby improving the safety of the battery 100. The explosion-proof valve may be provided to the first top cover 12 or the second top cover 13; the explosion-proof scores may be provided on the first top cover 12, the second top cover 13, or the case 11.

Variations and modifications of the above embodiments will occur to those skilled in the art to which the utility model pertains from the foregoing disclosure and teachings. Therefore, the present utility model is not limited to the above-described embodiments, but is intended to be capable of modification, substitution or variation in light thereof, which will be apparent to those skilled in the art in light of the present teachings. In addition, although specific terms are used in the present specification, these terms are for convenience of description only and do not limit the present utility model in any way.

Claims (10)

1. Battery case, its characterized in that: including casing (11) and first top cap (12), casing (11) are provided with first screw thread (111), first top cap (12) are insulating top cap, first top cap (12) are provided with second screw thread (124), first top cap (12) lid is located on casing (11), just second screw thread (124) with first screw thread (111) threaded connection.

2. The battery case according to claim 1, wherein: the first top cover (12) comprises a first base (121) and a first connecting portion (122), the first connecting portion (122) is arranged along the edge of the first base (121), the bottom of the first connecting portion (122) extends away from the first base (121) to form a first protruding portion (123), and the second thread (124) is formed on the first protruding portion (123).

3. The battery case according to claim 2, wherein: both ends of casing (11) are the open mouth, first screw thread (111) set up in the open mouth of one end of casing (11), the open edge of the other end of casing (11) is provided with holding ring (14), the bottom of holding ring (14) is kept away from the direction of casing (11) extends and forms second connecting portion (141), second connecting portion (141) threaded connection has second top cap (13).

4. A battery housing as claimed in claim 3, wherein: the second top cover (13) comprises a second base (131) and a third connecting portion (132), the third connecting portion (132) is arranged along the edge of the second base (131), the bottom of the third connecting portion (132) extends away from the second base (131) to form a second protruding portion (134), the second protruding portion (134) is provided with a third thread (133), the second connecting portion (141) is provided with a fourth thread (142), and the third thread (133) is in threaded connection with the fourth thread (142).

5. The battery housing of claim 4, wherein: the first base (121) and the second base (131) are both provided with through holes (15), a pole (16) is arranged in each through hole (15), and the pole (16) is in threaded connection with each through hole (15).

6. The battery housing of claim 5, wherein: the first base (121) and the second base (131) are both provided with a first groove (17), the through hole (15) is located in the first groove (17), the upper end edge of the pole (16) is provided with a supporting portion (161), and the supporting portion (161) is located in the first groove (17).

7. The battery housing of claim 5, wherein: a thinning structure (162) is arranged on the pole (16).

8. The battery housing of claim 4, wherein: one of the first base (121) and the second base (131) is provided with a liquid injection hole (18), and the liquid injection hole (18) is in threaded connection with a sealing nail (19).

9. A battery, characterized in that: comprising an electrical core (20) and a battery housing according to any one of claims 1 to 8, said electrical core (20) being arranged in said housing.

10. Electric equipment, its characterized in that: comprising the battery of claim 9.