CN220066027U - Battery monomer, battery and electric equipment - Google Patents

Abstract

The utility model relates to a battery monomer, a battery and electric equipment. The battery cell includes: a housing; the battery cell component is accommodated in the shell; the pole is arranged on the shell in an insulating way, and one side of the pole, which is close to the battery cell assembly, is provided with a containing groove; the current collecting disc is arranged on one side of the battery cell component facing the pole and is electrically connected with the battery cell component; the current collecting disc is provided with a welding boss which is in threaded connection with the accommodating groove and is welded with the pole. On one hand, the current collecting disc is welded and fixed with the pole through the welding boss, and the current collecting disc is electrically connected with the pole; on the other hand, the current collecting disc is in threaded fixation with the accommodating groove of the pole through the welding boss, so that the connection firmness between the current collecting disc and the pole is greatly enhanced, the welding position of the current collecting disc and the pole is prevented from being torn in the long-term use process, and the current collecting disc and the pole are prevented from being separated from each other to cause the internal disconnection of the battery cell.

Description

Battery monomer, battery and electric equipment

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery monomer, a battery and electric equipment.

Background

Batteries are widely used in various devices such as cellular phones, notebook computers, battery cars, electric vehicles, electric airplanes, electric ships, electric toy vehicles, electric toy ships, electric toy airplanes, electric tools, and the like. The battery cell is an important component of the battery and generally comprises a shell, and an electric core assembly and a current collecting disc which are accommodated in the shell. The current collecting disc is used for realizing the electric connection between the electrode lug and the electrode post of the battery cell assembly so as to form a conductive path.

The battery produces deformation and vibration because of the electric core subassembly that vehicle jolts vibrations aroused in the in-service use to produce and pull the welding department of mass flow dish and utmost point post, especially to the great battery monomer of overall dimension, its electric core subassembly's weight is great, therefore the dynamics of pulling this kind of mass flow dish is bigger, and long-term pulling makes the welding department tearing of mass flow dish and utmost point post even break away from each other easily, leads to the inside circuit breaker of battery monomer.

Disclosure of Invention

Based on this, it is necessary to provide a battery cell, a battery and electric equipment for improving the above-mentioned defects, aiming at the problems that the welding part of the current collecting disc and the pole is torn and even separated from each other in the long-term use process in the prior art, resulting in the internal circuit breaking of the battery cell.

A battery cell comprising:

a housing;

the battery cell assembly is accommodated in the shell;

the pole is arranged on the shell in an insulating way, and one side of the pole, which is close to the battery cell assembly, is provided with a containing groove; a kind of electronic device with high-pressure air-conditioning system

The current collecting disc is arranged on one side of the battery cell assembly, facing the pole, and is electrically connected with the battery cell assembly;

the current collecting disc is provided with a welding boss which is in threaded connection with the accommodating groove and is welded with the pole.

In one embodiment, the side wall of the accommodating groove is provided with an internal thread, and the side wall of the welding boss is provided with an external thread which can be screwed with the internal thread.

In one embodiment, the radial dimension of the receiving groove gradually decreases from one end close to the battery cell assembly to one end far away from the battery cell assembly.

In one embodiment, the radial dimension of the end, close to the battery cell assembly, of the accommodating groove is R, and the radial dimension of the end, far away from the battery cell assembly, of the accommodating groove is R, and R-R is 2.25 mm-4 mm-2 mm.

In one embodiment, the accommodating groove comprises a reducing section and a threaded section, and the threaded section is positioned at one end of the reducing section, which is away from the battery cell assembly;

the diameter-variable section gradually reduces from one end close to the battery cell assembly to one end close to the threaded section, the radial dimension of the threaded section is equal to the radial dimension of one end of the diameter-variable section close to the threaded section, and the internal thread is positioned on the side wall of the threaded section.

In one embodiment, the welding boss is attached to the bottom wall of the accommodating groove, and laser penetration welding is performed on one side of the pole away from the battery cell assembly.

In one embodiment, a thickness dimension between a side surface of the pole facing away from the cell assembly and a bottom wall of the receiving groove is less than or equal to 1.2mm.

In one embodiment, a side surface of the pole facing away from the battery cell assembly is recessed to form a thinning groove, and the thinning groove and the accommodating groove are opposite to each other.

A battery comprising a battery cell as described in any one of the embodiments above.

A powered device comprising a battery cell or battery as described in any of the embodiments above.

When the battery monomer, the battery and the electric equipment are assembled, firstly, the pole is arranged on the shell in an insulating way, and the current collecting disc is electrically connected to the electric core assembly. And then screwing the current collecting disc and the battery core assembly into the shell (namely, into the shell) until the welding boss on the current collecting disc is fixed in the accommodating groove of the pole column through threads. And then, welding the pole and the welding boss, thereby completing the assembly of the pole, the current collecting disc and the battery cell assembly. That is, on one hand, the current collecting disc is welded and fixed with the pole through the welding boss, and the current collecting disc is electrically connected with the pole; on the other hand, the current collecting disc is in threaded fixation with the accommodating groove of the pole through the welding boss, so that the connection firmness between the current collecting disc and the pole is greatly enhanced, the welding position of the current collecting disc and the pole is prevented from being torn in the long-term use process, and the current collecting disc and the pole are prevented from being separated from each other to cause the internal disconnection of the battery cell.

Drawings

Fig. 1 is a schematic exploded view of a battery cell according to an embodiment of the present utility model;

fig. 2 is a schematic view illustrating an assembly structure of a post and a current collecting plate of the battery cell shown in fig. 1;

fig. 3 is a cross-sectional view of the assembled structure of the pole and the current collecting plate shown in fig. 2;

FIG. 4 is a cross-sectional view of the post shown in FIG. 3;

fig. 5 is a cross-sectional view of the manifold plate shown in fig. 3;

FIG. 6 is a cross-sectional view of an assembled structure of a pole and a housing in another embodiment;

FIG. 7 is a cross-sectional view of an assembled structure of a pole and a housing in yet another embodiment;

fig. 8 is a cross-sectional view of a post in yet another embodiment.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

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 formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. 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.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

In one embodiment of the utility model, a battery is provided that refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery referred to in the present utility model may include a battery module, a battery pack, or the like. In particular, the battery generally includes a case for enclosing one or more battery cells. The case body can prevent liquid or other foreign matters from affecting the charge or discharge of the battery cells. Specifically, in the battery, the number of the battery cells may be one or more. If the number of the battery cells is multiple, the multiple battery cells can be connected in series or in parallel or in series-parallel connection, and the series-parallel connection means that the multiple battery cells are connected in series or in parallel. The battery modules can be formed by connecting a plurality of battery monomers in series or in parallel or in series-parallel connection, and the battery modules are connected in series or in parallel or in series-parallel connection to form a whole and are accommodated in the box body. Or all the battery cells can be directly connected in series or in parallel or in series-parallel, and then the whole formed by all the battery cells is accommodated in the box body.

It is understood that the battery cell may include a lithium ion secondary battery cell, a lithium ion primary battery cell, a lithium sulfur battery cell, a sodium ion battery cell, or a magnesium ion battery cell, which is not limited in the embodiment of the utility model. The battery cell may be in a cylindrical shape, a flat shape, a rectangular parallelepiped shape, or other shapes, which is not limited in this embodiment of the utility model. The battery cells are generally classified into three types according to the packaging method: the cylindrical battery cell, the square battery cell and the soft package battery cell are not limited in this embodiment.

Referring to fig. 1 to 3, an embodiment of the utility model provides a battery cell, which includes a housing 10, a cell assembly 20, a post 30 and a current collecting plate 40. The battery cell assembly 20 is accommodated in the housing 10, and the pole post 30 is arranged on the housing 10 in an insulating manner. The terminal 30 is recessed on a side surface of the battery cell assembly 20 to form a receiving groove 33 (see fig. 4). A current collecting plate 40 is also accommodated in the housing 10 and is located at a side of the cell assembly 20 facing the pole 30, and the current collecting plate 40 is electrically connected with the cell assembly 20. The manifold plate 40 has a weld boss 41. The welding boss 41 is screwed into the receiving groove 33 and is welded with the pole 30, thereby realizing the fixed connection between the current collecting plate 40 and the pole 30 on one hand, and the electric core assembly 20 is electrically connected with the pole 30 through the current collecting plate 40 on the other hand, so that the pole 30 can be used as one electrode of the battery cell.

In the assembly of the battery cell, first, the pole 30 is insulated from the case 10, and the current collecting plate 40 is electrically connected to the cell assembly 20. The current collecting plate 40 is then screwed into the housing 10 (i.e., into the housing) together with the cell assembly 20 until the welding boss 41 on the current collecting plate 40 is screwed into the receiving groove 33 of the pole 30. Then, the electrode post 30 is welded with the welding boss 41, thereby completing the assembly of the electrode post 30, the current collecting plate 40 and the battery cell assembly 20. That is, on the one hand, the current collecting plate 40 is welded and fixed with the pole 30 by the welding boss 41, and the current collecting plate 40 is electrically connected with the pole 30; on the other hand, the current collecting disc 40 is screwed with the accommodating groove 33 of the pole 30 through the welding boss 41, so that the connection firmness between the current collecting disc 40 and the pole 30 is greatly enhanced, the welding position of the current collecting disc 40 and the pole 30 is prevented from being torn in the long-term use process, and the current collecting disc 40 and the pole 30 are prevented from being separated from each other to cause the internal disconnection of the battery cell.

It should be noted that, the receiving groove 33 on the pole 30 is used to receive the welding boss 41 on the current collecting disc 40, and the welding boss 41 is in threaded connection in the receiving groove 33, so as to be beneficial to increasing the contact area between the current collecting disc 40 and the pole 30, enhancing the overcurrent capability at the junction of the current collecting disc 40 and the pole 30, and being more suitable for rapid charging with large current.

Referring to fig. 3 to 5, in the embodiment of the utility model, an internal thread a1 is formed on a side wall of the receiving groove 33, an external thread a2 is formed on a side wall of the welding boss 41, and the internal thread a1 can be screwed with the external thread a2, so that the welding boss 41 is screwed into the receiving groove 33 of the pole 30.

In some embodiments, the radial dimension of the receiving groove 33 is unchanged, i.e., the receiving groove 33 is cylindrical. Thus, the side wall of the receiving groove 33 is a cylindrical surface on which the female screw a1 is machined. In order to enable the male screw a2 to be screwed with the female screw a1, the side wall of the welding boss 41 should also be a cylindrical surface on which the male screw a2 is also machined. The internal thread a1 and the external thread a2 are machined by utilizing the cylindrical surface, the machining is convenient, the machining difficulty is low, the screwing process of the internal thread a1 and the external thread a2 is smoother, and the battery cell assembly 20 and the current collecting disc 40 are convenient to be put into the shell. It will be appreciated that the inner wall of the receiving recess 33 includes a bottom wall and a side wall disposed about the bottom wall, the bottom wall and the side wall collectively enclosing to form the receiving recess 33.

Referring to fig. 6 and 7, in other embodiments, the radial dimension of the receiving groove 33 gradually decreases from one end close to the cell assembly 20 to one end far away from the cell assembly 20, i.e. the receiving groove 33 is in a frustum shape, and the large diameter end of the receiving groove 33 faces the cell assembly 20, and the small diameter end of the receiving groove 33 faces away from the cell assembly 20. Thus, the side wall of the receiving groove 33 is a conical surface, and the female screw a1 is machined on the conical surface. In order to enable the external thread a2 to be screwed with the internal thread a1, the side wall of the welding boss 41 should also be a conical surface (i.e., the welding boss 41 should also be a frustum shape) on which the external thread a2 is also machined.

It should be noted that, the accommodating groove 33 is configured to be a frustum, and the large diameter end of the accommodating groove 33 faces the battery cell assembly 20, and the small diameter end of the accommodating groove 33 faces away from the battery cell assembly 20, so that the alignment difficulty between the welding boss 41 on the current collecting disc 40 and the accommodating groove 33 when the battery cell assembly 20 and the current collecting disc 40 are put into the shell is reduced, and collision between the welding boss 41 on the current collecting disc 40 and the edge of the accommodating groove 33 is avoided.

Optionally, the radial dimension R of the end of the receiving groove 33 near the cell assembly 20 is R of the radial dimension R of the end of the receiving groove 33 remote from the cell assembly 20. Wherein R-R is less than or equal to 2.25mm and less than or equal to 4mm. It should be noted that, in order to facilitate the battery cell assembly 20 and the current collecting plate 40 to smoothly enter the housing 10, the outer diameter R of the battery cell assembly 20 _{Outer part} And an inner diameter R of the housing 10 _{Inner part} The method meets the following conditions: r is more than or equal to 95 percent _{Outer part} /R _{Inner part} 99.9% or less. When the inner diameter of the housing 10 is 45mm, 0.045 mm.ltoreq.R _{Outer part} -R _{Inner part} ) And is less than or equal to 2.25mm, so when R-R is less than or equal to 2.25mm and is less than or equal to 4mm, the gap between the welding boss 41 and the accommodating groove 33 is greater than or equal to the gap between the battery cell assembly 20 and the shell 10, and the phenomenon that the welding boss 41 of the current collecting disc 40 collides with the edge of the accommodating groove 33 of the pole 30 can not occur when the current collecting disc is put into the shell, thereby greatly improving the production efficiency and the product yield.

Referring to fig. 8, in still other embodiments, the receiving groove 33 includes a reducing section 331 and a threaded section 332, and the threaded section 332 is located at an end of the reducing section 331 facing away from the battery cell assembly 20. The diameter-variable section 331 tapers in radial dimension from an end near the cell assembly 20 to an end near the threaded section 332. The radial dimension of the thread segment 332 is equal to the radial dimension of the end of the variable diameter segment 331 near the thread segment 332, and the internal thread a1 is machined on the side wall of the thread segment 332.

Thus, the side wall of the reducing section 331 is a conical surface, the large diameter end of the reducing section 331 faces towards the battery cell assembly 20, and the small diameter end faces away from the battery cell assembly 20, so that when the battery cell assembly 20 and the current collecting disc 40 are put into the shell, the welding boss 41 on the current collecting disc 40 firstly enters the reducing section 331, namely, the reducing section 331 can guide the welding boss 41 on the current collecting disc 40, and the welding boss 41 is prevented from colliding with the edge of the accommodating groove 33. The side wall of the thread segment 332 is a cylindrical surface on which the internal thread a1 is machined. In order to enable the male screw a2 to be screwed with the female screw a1, the side wall of the welding boss 41 should also be a cylindrical surface on which the male screw a2 is machined.

When the cell assembly 20 and the current collecting plate 40 are in the case, the welding boss 41 on the current collecting plate 40 is aligned with the receiving groove 33, and the welding boss 41 enters the reducing section 331 of the receiving groove 33. Then, as the battery module 20 and the current collecting plate 40 continue to be screwed into the housing 10, the welding boss 41 on the current collecting plate 40 reaches the threaded section 332, and then is screwed into the threaded section 332 (the internal thread a1 and the external thread a2 are screwed together), until the welding boss 41 on the current collecting plate 40 is screwed into the threaded section 332 of the receiving groove 33.

It should be noted that, the reducing section 331 of the accommodating groove 33 is configured to be a frustum shape, and the large diameter end of the reducing section 331 faces the battery cell assembly 20, and the small diameter end of the reducing section 331 faces away from the battery cell assembly 20, so that the alignment difficulty between the welding boss 41 on the current collecting disc 40 and the accommodating groove 33 is reduced, and collision between the welding boss 41 on the current collecting disc 40 and the edge of the accommodating groove 33 is avoided when the battery cell assembly 20 and the current collecting disc 40 are put into the shell. The thread section 332 and the welding boss 41 are arranged to be cylindrical, the internal thread a1 and the external thread a2 are machined by using cylindrical surfaces, machining is convenient, machining difficulty is low, the screwing process of the internal thread a1 and the external thread a2 is smoother, and the battery cell assembly 20 and the current collecting disc 40 are convenient to put into a shell more smoothly.

Optionally, the radial dimension R of the end of the reducing section 331 of the accommodating groove 33 close to the cell assembly 20 is R, and the radial dimension R of the end of the reducing section 331 of the accommodating groove 33 far from the cell assembly 20 is 2.25mm R-R4 mm. It should be noted that, in order to facilitate the battery cell assembly 20 and the current collecting plate 40 to smoothly enter the housing 10, the outer diameter R of the battery cell assembly 20 _{Outer part} And an inner diameter R of the housing 10 _{Inner part} The method meets the following conditions: r is more than or equal to 95 percent _{Outer part} /R _{Inner part} 99.9% or less. When the inner diameter of the housing 10 is 45mm, 0.045 mm.ltoreq.R _{Outer part} -R _{Inner part} ) And is less than or equal to 2.25mm, so when R-R is less than or equal to 2.25mm and is less than or equal to 4mm, the gap between the welding boss 41 and the variable diameter section 331 of the accommodating groove 33 is greater than or equal to the gap between the battery cell assembly 20 and the shell 10, and the phenomenon that the welding boss 41 of the current collecting disc 40 collides with the edge of the accommodating groove 33 of the pole 30 can not occur when the current collecting disc is put into the shell, thereby greatly improving the production efficiency and the product yield.

Referring to fig. 1 to 3, in the embodiment of the utility model, one end of the welding boss 41 of the current collecting plate 40 facing away from the battery cell assembly 20 is attached to the bottom wall of the accommodating groove 33, and the two ends are subjected to laser penetration welding by the side of the pole 30 facing away from the battery cell assembly 20 (i.e. the outer side of the pole 30). That is, when the welding boss 41 of the collecting tray 40 is screw-fixed to the receiving groove 33 of the pole 30, the welding boss 41 and the bottom wall of the receiving groove 33 are adhered to each other. Then, the laser welding head is located at the outer side of the pole 30 (i.e., the side of the pole 30 facing away from the battery cell assembly 20), and emits a laser beam to the outer side of the pole 30, and the heat generated by the laser beam penetrates the pole 30 to the bottom wall of the receiving groove 33 and the welding boss 41 (i.e., the outer side of the pole 30 is used for laser penetration welding the welding boss 41 and the pole 30), so that the welding boss 41 and the bottom wall of the receiving groove 33 of the pole 30 are welded and fixed. Therefore, on one hand, welding in the shell 10 is avoided, and further the risk of short circuit caused by the fact that welding slag generated during welding remains in the shell 10 is avoided; on the other hand, the thickness of the penetration welding part of the pole 30 is effectively reduced by the accommodating groove 33, so that the welding difficulty is reduced, and the welding quality is improved.

Preferably, the thickness dimension between the side surface of the terminal 30 facing away from the cell assembly 20 to the bottom wall of the receiving groove 33 is less than or equal to 1.2mm. In this way, the thickness of the part of the pole 30, which needs to be subjected to laser penetration welding, is designed to be less than or equal to 1.2mm, so that laser penetration welding is convenient, the risk of occurrence of welding defects is reduced, and welding quality is ensured.

Referring to fig. 7, in an embodiment, a side surface of the terminal 30 facing away from the cell assembly 20 is recessed to form a thinned recess 35. The thinned groove 35 and the accommodating groove 33 are opposite to each other, so that the thinned groove 35 and the accommodating groove 33 are utilized to thin the part of the pole 30, which needs to be subjected to laser penetration welding, and the thickness of the part of the pole 30, which needs to be subjected to laser penetration welding, is ensured to meet the welding process requirement. In the process of actually performing laser penetration welding, the bottom wall of the thinning groove 35 is irradiated by the laser beam emitted by the laser welding head, and the heat generated by the laser beam passes through the pole 30 to reach the bottom wall of the accommodating groove 33, so that the welding boss 41 of the collecting tray 40 is welded and fixed on the bottom wall of the accommodating groove 33.

Further, on a projection plane perpendicular to the depth direction of the thinning groove 35, the orthographic projection of the bottom wall of the accommodating groove 33 is within the range of the orthographic projection of the bottom wall of the thinning groove 35. In this way, the welding area between the welding boss 41 of the current collecting plate 40 and the pole 30 is increased as much as possible, and the overcurrent capacity of the welding position between the welding boss 41 of the current collecting plate 40 and the pole 30 is enhanced. Further, the thinned groove 35 is collinear with the centerline of the receiving groove 33, and the radial dimension of the thinned groove 35 is greater than or equal to the radial dimension of the receiving groove 33.

Optionally, the radial dimension of the thinning groove 35 gradually increases from the end close to the cell assembly 20 to the end far away from the cell assembly 20, so that the thinning groove 35 is in a bell mouth shape, and laser is beneficial to being injected into the thinning groove 35 when laser penetration welding is performed.

It should be noted that, in some embodiments, as shown in fig. 6, the accommodating groove 33 is only formed on the pole 30 (the accommodating groove 35 is not formed), and the portion of the pole 30 requiring laser penetration welding can be thinned by increasing the depth of the accommodating groove 33.

Referring to fig. 6 and 7, in an embodiment of the utility model, a mounting hole (not shown) is formed at one end of the housing 10, and the pole 30 is inserted through the mounting hole and is riveted and fixed with the housing 10. Specifically, the battery cell further includes a support ring 60 and an elastic seal 70, wherein an end of the pole 30 located outside the housing 10 has an abutting portion 31, and an end of the pole 30 located inside the housing 10 has a caulking portion 32. The support ring 60 is located inside the housing 10, is sleeved outside the pole 30, and is riveted and fixed with the riveting portion 32. The elastic seal 70 is located outside the housing 10, is sleeved outside the pole 30, and abuts between the abutting portion 31 of the pole 30 and the housing 10, that is, the abutting portion 31 of the pole 30 abuts against the housing 10 through the elastic seal 70, so that the pole 30, the elastic seal 70, the support ring 60 and the housing 10 are fixed.

Specifically, the abutting portion 31 has a structure of the pole 30 itself (i.e., the abutting portion 31 exists before the pole 30 is riveted to the support ring 60), and the caulking portion 32 is formed when the pole 30 is riveted to the support ring 60. More specifically, at the time of assembly, the pole 30 is first inserted into the mounting hole from the outside of the housing 10 until the abutting portion 31 abuts the outside of the housing 10 through the elastic seal 70, and the end of the pole 30 located inside the housing 10 passes through the support ring 60. Then, the end of the pole 30 located in the housing 10 is mechanically pressed (such as spin riveting, etc.), and during the pressing process, the outer diameter of the end of the pole 30 located in the housing 10 is enlarged to form a riveted part 32, so that the riveted part 32 is in stop fit with the support ring 60, thereby realizing the relative fixation of the pole 30 and the housing 10.

In particular embodiments, the battery cell further includes a first insulator 90 and a second insulator 80. The first insulator 90 is disposed within the case 10 between the current collecting plate 40 and the case 10, so that insulation of the current collecting plate 40 from the case 10 is achieved by the first insulator 90. The second insulating member 80 is sleeved outside the elastic sealing member 70 and is located between the abutting portion 31 and the housing 10, and on one hand, the abutting portion 31 of the pole 30 and the housing 10 are insulated by the elastic sealing member 70 and the second insulating member 80; on the other hand, the second insulating member 80 may limit the compression amount of the abutting portion 31 on the elastic sealing member 70, so as to avoid over-compressing the elastic sealing member 70, which is beneficial to improving the service life of the elastic sealing member 70.

Further, the outer ring portion of the supporting ring 60 abuts against the surface of the first insulating member 90 facing the side of the battery cell assembly 20, the inner ring portion of the supporting ring 60 is in stop fit with the riveting portion 32 facing the side of the abutting portion 31, so that the abutting portion 31 and the riveting portion 32 jointly compress the supporting ring 60, the first insulating member 90, the housing 10, the second insulating member 80 and the elastic sealing member 70 therebetween, namely, fixation of the pole 30 and the housing 10 is achieved; on the other hand, the insulation of the support ring 60 from the housing 10 is achieved by means of a first insulation 90.

Further, portions of the first insulator 90 and/or portions of the elastomeric seal 70 are located between the post 30 and the inner wall of the mounting hole, thereby avoiding electrical communication between the post 30 and the housing 10.

The material of the first insulating member 90 and the second insulating member 80 may be plastic, but other insulating materials may be used, and the present utility model is not limited thereto. The elastic sealing member 70 may be made of rubber, but other materials having certain elasticity and insulation may be used, which is not limited herein. The material of the support ring 60 may be stainless steel, but other materials may be used, as long as riveting can be achieved, and the present utility model is not limited thereto.

In particular embodiments, the battery cell further includes a cap plate 12 and a current collecting member 50. The end of the casing 10 facing away from the mounting hole is provided with an opening 13, and the cover plate 12 is welded to the opening 13 of the casing 10 in a sealing manner to seal the opening 13, so that the casing 10 and the cover plate 12 together enclose a containing space for containing the battery cell assembly 20, the current collecting disc 40, electrolyte and the like. The current collecting member 50 is disposed between the cell assembly 20 and the cap plate 12. The current collecting member 50 is electrically connected with the battery cell assembly 20 and electrically connected with the cap plate 12 and/or the case 10, thereby achieving the electrical connection of the case 10 and the battery cell assembly 20 such that the case 10 can function as the other electrode of the battery cell. That is, the post 30 and the case 10 serve as two electrodes (i.e., a positive electrode and a negative electrode) of the battery cell, respectively, and input and output of electric energy of the battery cell are commonly achieved.

Specifically, the cell assembly 20 is composed of a positive electrode tab, a negative electrode tab, and a separator. The battery cell mainly relies on metal ions to move between the positive pole piece and the negative pole piece to work. The positive electrode plate comprises a positive electrode current collector and a positive electrode active material layer, wherein the positive electrode active material layer is coated on the surface of the positive electrode current collector, the positive electrode current collector without the positive electrode active material layer protrudes out of the positive electrode current collector coated with the positive electrode active material layer, and the positive electrode current collector without the positive electrode active material layer is used as a positive electrode lug. Taking a lithium ion battery as an example, the material of the positive electrode current collector may be aluminum, and the positive electrode active material may be lithium cobaltate, lithium iron phosphate, ternary lithium, lithium manganate or the like. The negative electrode plate comprises a negative electrode current collector and a negative electrode active material layer, wherein the negative electrode active material layer is coated on the surface of the negative electrode current collector, the negative electrode current collector without the negative electrode active material layer protrudes out of the negative electrode current collector coated with the negative electrode active material layer, and the negative electrode current collector without the negative electrode active material layer is used as a negative electrode tab. The material of the negative electrode current collector may be copper, and the negative electrode active material may be carbon, silicon, or the like. The material of the separator may be polypropylene (PP) or Polyethylene (PE). In addition, the cell assembly 20 may be a winding type structure or a lamination type structure, and the embodiment of the present utility model is not limited thereto.

Optionally, the current collecting plate 40 is electrically connected to the positive tab of the cell assembly 20, such that the post 30 serves as the positive electrode of the battery cell. The current collecting member 50 is electrically connected with the negative electrode tab of the battery cell assembly 20 such that the case 10 serves as the negative electrode of the battery cell. Of course, in other embodiments, the current collecting plate 40 is electrically connected with the negative tab of the cell assembly 20 such that the post 30 acts as the negative electrode of the battery cell. The current collecting member 50 is electrically connected with the positive electrode tab of the battery cell assembly 20 such that the case 10 serves as a positive electrode of the battery cell, which is not limited herein.

Alternatively, the material of the housing 10 and the cover plate 12 may be steel. The material of the current collecting plate 40 and the current collecting member 50 may be copper, and the outer surface of the current collecting plate 40 and the current collecting member 50 has a nickel plating layer. Of course, in other embodiments, other conductive materials may be used for the housing 10, the cover plate 12, the current collecting plate 40, and the current collecting member 50, which are not limited herein.

Based on the battery, the utility model further provides electric equipment. The powered device includes a battery or battery cell as described in any of the embodiments above, with the powered device utilizing the battery or battery cell as a power source. In particular, the electrical consumer may be a vehicle, a mobile phone, a portable device, a notebook computer, a ship, a spacecraft, an electric toy, an electric tool, and the like. The vehicle can be a fuel oil vehicle, a fuel gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle or a range-extended vehicle; 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 utility model does not limit the electric equipment in particular.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (10)

1. A battery cell, comprising:

a housing (10);

a cell assembly (20) housed within the housing (10);

the pole (30) is arranged on the shell (10) in an insulating way, and one side of the pole (30) close to the battery cell assembly (20) is provided with a containing groove (33); a kind of electronic device with high-pressure air-conditioning system

The current collecting disc (40) is arranged on one side of the battery cell assembly (20) facing the pole post (30) and is electrically connected with the battery cell assembly (20);

the current collecting disc (40) is provided with a welding boss (41), and the welding boss (41) is in threaded connection with the accommodating groove (33) and is welded with the pole post (30).

2. The battery cell according to claim 1, wherein the side wall of the receiving groove (33) has an internal thread (a 1), and the side wall of the welding boss (41) has an external thread (a 2) that can be screwed with the internal thread (a 1).

3. The battery cell according to claim 2, wherein the receiving groove (33) gradually decreases in radial dimension from an end closer to the cell assembly (20) to an end farther from the cell assembly (20).

4. A battery cell according to claim 3, wherein the radial dimension of the end of the receiving groove (33) close to the cell assembly (20) is R, and the radial dimension of the end of the receiving groove (33) far from the cell assembly (20) is R, and R-R is 2.25 mm-R-4 mm.

5. The battery cell according to claim 2, wherein the receiving groove (33) comprises a reducing section (331) and a threaded section (332), the threaded section (332) being located at an end of the reducing section (331) facing away from the cell assembly (20);

the radial dimension of the reducing section (331) gradually decreases from one end close to the battery cell assembly (20) to one end close to the threaded section (332), the radial dimension of the threaded section (332) is equal to the radial dimension of one end of the reducing section (331) close to the threaded section (332), and the internal thread (a 1) is located on the side wall of the threaded section (332).

6. The battery cell according to any one of claims 1 to 5, wherein the welding boss (41) is attached to the bottom wall of the receiving groove (33) and laser penetration welding is performed from the side of the pole (30) facing away from the cell assembly (20).

7. The battery cell according to claim 6, wherein a thickness dimension between a side surface of the post (30) facing away from the cell assembly (20) to a bottom wall of the receiving groove (33) is less than or equal to 1.2mm.

8. The battery cell according to claim 6, wherein a side surface of the pole (30) facing away from the cell assembly (20) is recessed to form a thinning groove (35), the thinning groove (35) and the receiving groove (33) being opposite to each other.

9. A battery comprising a battery cell according to any one of claims 1 to 8.

10. A powered device comprising a battery cell according to any one of claims 1 to 8 or a battery according to claim 9.