CN219286540U - Insulating member, battery top cap and battery - Google Patents

Abstract

The utility model relates to an insulating part, a battery top cover and a battery, wherein the insulating part comprises a first insulating plate and a second insulating plate which are arranged at intervals, a mounting gap for accommodating pins and lugs is formed between the first insulating plate and the second insulating plate, a containing groove is formed in one side face of the second insulating plate, which faces to the first insulating plate, a notch of the containing groove faces to the inside of the mounting gap, the pins are inserted into the mounting gap, the end parts of the pins are positioned in the containing groove, and the lugs are inserted into the mounting gap along the direction from the bottom of the containing groove to the notch and are connected with the pins. Through setting up the holding tank on the second insulation board, the second connecting plate of pin inserts in the holding tank in the lump when locating the installation space, utilizes the holding tank to protect the tip of pin. The electrode lug can be prevented from being scratched due to contact with the end part of the pin after being inserted into the mounting gap.

Description

Insulating member, battery top cap and battery

Technical Field

The utility model relates to the technical field of battery manufacturing, in particular to an insulating part, a battery top cover comprising the insulating part and a battery comprising the battery top cover.

Background

Lithium ion batteries are widely used as energy sources for smart phones, electric tools, and new energy automobiles due to their high specific energy. Along with the increasing requirements of application terminals on the energy source endurance capability, the requirements of people on the energy density of lithium ion batteries are continuously increased, so that the lithium ion batteries are required to have higher space utilization rate and simpler and more reliable structure to improve the space occupation ratio of core packages in the batteries in the whole batteries. In a common battery structure, a pole column on a cover plate and a pole lug in a core pack are connected by adopting an L-shaped pin, a connecting plate of the pin and the end part of the core pack are arranged right opposite, and the pole lug on the core pack is wound to a side surface of the connecting plate, deviating from the core pack, from the connecting plate through the end part of the connecting plate, and is fixed by laser welding. The prior art has the following defects: because the pin is the extremely thin foil of thickness, when the tab bypasses the tip of pin, the tip of pin very easily fish tail tab, causes the tab to damage.

Disclosure of Invention

An object of the present utility model is to provide an insulating member, which can protect the end of the lead to avoid the lead from scratching the tab.

Another object of the present utility model is to provide a battery top cover that can perform insulation protection and mechanical protection on the tab.

It is still another object of the present utility model to provide a battery that can perform insulation protection and mechanical protection for tabs.

To achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides an insulating part, including first insulation board and the second insulation board that the interval set up, first insulation board with form the installation space that is used for holding pin and utmost point ear between the second insulation board, the second insulation board orientation a side of first insulation board is provided with the holding tank, the notch orientation of holding tank the inside in installation space, the pin is inserted and is located in the installation space, and make the tip of pin is located in the holding tank, the utmost point ear is followed the tank bottom of holding tank inserts to the direction of notch in the installation space, and with the pin is connected.

Further, the number of the accommodating grooves is two, the two accommodating grooves are respectively positioned at two opposite ends of the second insulating plate, and two ends of the pin are respectively inserted into the two accommodating grooves.

Further, the first insulating plate and the second insulating plate are integrally bent and formed.

Further, the second insulating board includes first board, second board and third board, first board with first insulating board is parallel and the interval sets up, the third board is located first board with between the first insulating board, the both ends of second board respectively with first board with the third board is connected, and makes first board, the second board with enclose between the third board the holding tank.

Further, the length of the third plate is greater than or equal to the length of the tab.

Further, the pin inserting port is further provided with a third insulating plate, the third insulating plate is arranged at one end of the second insulating plate, the third insulating plate is close to the pin inserting port of the mounting gap, and the free end of the third insulating plate extends towards the direction deviating from the first insulating plate.

Further, the width of the first insulating plate is larger than the width of the second insulating plate.

The battery top cover comprises the insulating piece, a cover plate, a pole column and a pin, wherein the pole column penetrates through the cover plate, one end of the pin is connected with the pole column, the other end of the pin is connected with the pole lug, and the pin is used for connecting one end of the pole lug is inserted into the installation gap.

Further, the pins and the insulating piece are fixed through high-temperature glue.

The battery comprises the battery top cover and a core pack, wherein the end part of the core pack is provided with a tab, and the free end of the tab is inserted into the mounting gap along the direction from the bottom of the accommodating groove to the notch and is connected with the pin.

Compared with the prior art, the utility model has the beneficial effects that:

according to the insulating piece, the battery top cover and the battery, the accommodating groove is formed in the second insulating plate, the second connecting plate of the pin is inserted into the accommodating groove while being inserted into the mounting gap, and the end part of the pin is protected by the accommodating groove. The electrode lug can be prevented from being scratched due to contact with the end part of the pin after being inserted into the mounting gap.

Drawings

Fig. 1 is a top view of a battery according to an embodiment of the present utility model.

Fig. 2 is an exploded view of a battery according to an embodiment of the present utility model.

Fig. 3 is a schematic view of an insulating member according to an embodiment of the present utility model.

Fig. 4 is a cross-sectional view of an insulator according to an embodiment of the present utility model.

Fig. 5 is a schematic installation diagram of a tab and an insulator according to an embodiment of the utility model.

In the figure:

1. a cover plate; 2. pins; 21. a first connection plate; 22. a second connecting plate; 3. a pole; 4. an insulating member; 41. a first insulating plate; 42. a second insulating plate; 420. a receiving groove; 421. a first plate; 422. a second plate; 423. a third plate; 43. a third insulating plate; 44. a mounting gap; 45. a pin insertion port; 46. lug insertion openings; 5. a core pack; 51. a tab; 6. a housing; 7. and a protective film.

Detailed Description

In order to make the technical problems solved, the technical scheme adopted and the technical effects achieved by the utility model more clear, the technical scheme of the utility model is further described below by a specific embodiment in combination with the attached drawings.

As shown in fig. 1 to 4, the present utility model provides an insulating member 4 including a first insulating plate 41, a second insulating plate 42, and a third insulating plate 43. The first insulating plate 41 is arranged parallel to and spaced apart from the second insulating plate 42 such that a mounting space 44 is formed between the first insulating plate 41 and the second insulating plate 42, the mounting space 44 being for accommodating the lead 2 and the tab 51. The second insulating plate 42 is provided with a receiving groove 420 on a side facing the first insulating plate 41, and a notch of the receiving groove 420 faces the inside of the installation space 44. When the lead 2 and the tab 51 are mounted, one end of the lead 2 can be inserted into the mounting space 44, and the end of the lead 2 can be inserted into the accommodating groove 420. The tab 51 can be inserted into the mounting space 44 in a direction from the bottom of the receiving groove 420 to the notch, and the free end of the tab 51 is connected to the soldering region of the lead 2 by laser welding.

The insulating member 4 is made of an insulating material, and has a resistance value of 500MΩ or more, and the thickness of the insulating member 4 is 0.03mm to 3mm. The insulating piece 4 plays a role in insulating and protecting the pin 2 and the tab 51, and short circuit caused by the contact of the pin 2 and the tab 51 with other metal pieces in the battery is avoided. The pin 2 is "L" shape, and the pin 2 includes perpendicular first connecting plate 21 and the second connecting plate 22 that set up, and first connecting plate 21 is connected with utmost point post 3, and the second connecting plate 22 is connected with the utmost point ear 51 of the tip of core package 5 for core package 5 switches on through pin 2 and utmost point post 3 on the apron 1. The free ends of the tabs 51 are welded to the second connection plates 22 of the pins 2. The second connecting plate 22 is inserted into the mounting space 44, and the end of the second connecting plate 22 is located in the accommodating groove 420, so that the end of the second connecting plate 22 is protected by the accommodating groove 420, and the electrode tab 51 is prevented from being scratched due to contact between the end of the second connecting plate 22 and the electrode tab 51.

Specifically, referring to fig. 3, the first insulating plate 41 and the second insulating plate 42 are integrally bent and formed. The insulating member 4 further includes a bent plate, both ends of which are connected to the ends of the first insulating plate 41 and the second insulating plate 42, respectively, so that the first insulating plate 41, the bent plate, and the second insulating plate 42 are bent integrally in a "U" shape. Along the length direction (Z direction in the drawing) of the first insulating plate 41, the bent plate is located at one end of the first insulating plate 41 in the length direction. A pin insertion opening 45 communicating with the installation space 44 is formed between an end of the first insulating plate 41 facing away from the bent plate and the second insulating plate 42. One end of the second connecting plate 22 facing away from the first connecting plate 21 can be inserted into the installation recess 44 from the pin insertion opening. In the width direction (Y direction in the drawing) of the first insulating plate 41, tab insertion openings 46 communicating with the mounting space 44 are formed between both end portions in the width direction of the first insulating plate 41 and the second insulating plate 42, and the free ends of the tabs 51 can be inserted into the mounting space 44 from the tab insertion openings 46.

Alternatively, referring to fig. 4, there are two receiving grooves 420, and the two receiving grooves 420 are respectively located at opposite ends of the second insulating plate 42. In the present embodiment, two receiving grooves 420 are provided at both ends in the width direction (Y direction in the drawing) of the second insulating plate 42. The notches of the two accommodating grooves 420 are opposite, and two ends of the second connecting plate 22 of the pin 2 are respectively inserted into the two accommodating grooves 420.

The second insulating plate 42 includes a first plate 421, a second plate 422, and a third plate 423. The first plate 421 is parallel to the first insulating plate 41 and spaced apart, the third plate 423 is disposed between the first plate 421 and the first insulating plate 41, the third plate 423 is parallel to the first plate 421, and two ends of the second plate 422 are respectively connected with ends of the first plate 421 and the third plate 423, so that the accommodating groove 420 is defined among the first plate 421, the second plate 422 and the third plate 423. In the present embodiment, the first plate 421, the second plate 422, and the third plate 423 are integrally constructed.

It will be appreciated that the purpose of providing the receiving groove 420 on the second insulating plate 42 is to protect the end of the lead 2 from scratching the tab 51 by the sharp end of the lead 2. Therefore, the receiving groove 420 is provided corresponding to the tab 51, and when one end of the core pack 5 has one tab 51, one receiving groove 420 is provided on the second insulating plate 42; when the core pack 5 has two tabs 51 at one end, two receiving grooves 420 are provided on the second insulating plate 42. The notch of the accommodation groove 420 faces the inside of the installation space 44, i.e., the notch of the accommodation groove 420 faces the center line of the installation space 44 in the width direction (Y direction in the drawing). So that the receiving groove 420 communicates with the installation space 44, and the second connection plate 22 can be simultaneously inserted into the receiving groove 420 when being inserted into the installation space 44.

Alternatively, as shown with reference to fig. 4 and 5, the width of the first insulating plate 41 is greater than the width of the second insulating plate 42. The center lines of the first insulating plate 41 and the second insulating plate 42 in the width direction face each other, and by making the width of the first insulating plate 41 larger than the width of the second insulating plate 42, the first insulating plate 41 can be made to shield the tab 51 wound around the end portion of the second insulating plate 42, so that the tab 51 is prevented from contacting the inner wall of the case 6.

The length of the third plate 423 is greater than or equal to the length of the tab 51. In this embodiment, the length direction of the third plate 423 is the illustrated Z direction, and the length direction of the tab 51 is the illustrated Z direction. The length of the third plate 423 is greater than or equal to the length of the tab 51, so that the tab 51 is prevented from being scratched by contact with the end of the lead 2.

Specifically, referring to fig. 3, a third insulating plate 43 is used to isolate the first connection plate 21 of the pin 2 from the core pack 5, the third insulating plate 43 is provided at one end of the second insulating plate 42 in the longitudinal direction (Z direction in the drawing), and the third insulating plate 43 is close to the pin insertion port 45 of the insulating plate. The free end of the third insulating plate 43 extends in a direction away from the first insulating plate 41.

The remarkable effects of this embodiment are: by providing the accommodation groove 420 in the second insulating plate 42, the second connection plate 22 of the pin 2 is inserted into the accommodation groove 420 while being inserted into the installation space 44, and the end of the pin 2 is protected by the accommodation groove 420. The tab 51 is prevented from being scratched by contact with the end of the lead 2 after being inserted into the mounting space 44.

Referring to fig. 1 to 5, there is also provided a battery top cover including a cap plate 1, pins 2, a post 3, and an insulator 4. The cover plate 1 comprises an upper top cover made of a metal plate and a lower plastic plate made of an insulating plate, wherein the lower plastic plate is arranged on one side surface of the upper top cover facing the core bag 5, and the lower plastic plate plays a role in insulating isolation. The number of the polar posts 3 is two, one of which is a positive polar post and the other is a negative polar post. Correspondingly, the number of the pins 2 is two, and the two pins 2 are respectively used for being connected with the two polar posts 3. The two pins 2 are distributed at two ends of the cover plate 1 in the length direction (X direction in the drawing), and the two pins 2 are symmetrically arranged. The pole 3 is arranged on the cover plate 1 in a penetrating way, one end of the pole 3 extends to the outside of the battery, and the other end extends to the inside of the battery and is connected with the first connecting plate 21 of the pin 2. The second connection plates 22 of the pins 2 are distributed at both ends in the longitudinal direction (X direction in the drawing) of the battery, and the core pack 5 is mounted between the second connection plates 22 corresponding to the two pins 2. The tab 51 on the core pack 5 bypasses the end of the second connection plate 22 in the width direction and is superposed on one side surface of the second connection plate 22 facing away from the core pack 5, and the two are welded and fixed. The insulator 4 is used for insulating and protecting the pin 2, and the second connecting plate 22 and the tab 51 of the pin 2 are both inserted into the mounting gap 44 of the insulator 4. The end of the second connection plate 22 is protected by providing the receiving groove 420 on the insulating member 4, so that the tab 51 is prevented from being scratched by the end of the second connection plate 22. Therefore, the battery top cover can perform insulation protection and mechanical protection on the tab 51.

Specifically, the outer shape of the pin 2 is matched with the overall outer shape of the insulator 4, and both are in an L shape. The third insulating plate 43 is disposed on a side surface of the first connecting plate 21 of the pin 2 facing the core package 5, and plays a role of isolating the first connecting plate 21 from the core package 5. The second connection plate 22 of the lead 2 and the tab 51 mounted on the second connection plate 22 are accommodated in the mounting space 44 such that the first insulation plate 41 and the second insulation plate 42 protect the second connection plate 22 and the tab 51 from insulation. The pins 2 and the insulating piece 4 are fixed by high-temperature adhesive.

Referring to fig. 1 and 2, there is also provided a battery including a battery top cover, a core pack 5, a case 6, and a protective film 7. The outer shell 6 is an aluminum shell with a cavity structure, and the battery top cover is welded at the opening end of the outer shell 6, so that a closed accommodating cavity is formed between the outer shell 6 and the battery top cover. The core pack 5 has tabs 51 at both ends in the longitudinal direction, one of which is a positive tab and the other of which is a negative tab. The tab 51 is welded in the welding area of the corresponding second connecting plate 22, so as to realize the conduction between the core package 5 and the pole 3. The core package 5 is connected with the pins 2 and then is arranged in the accommodating cavity, and electrolyte is filled in the accommodating cavity. The protection film 7 covers the outside of the core pack 5 for protecting the core pack 5.

Referring to fig. 5, one end of the core pack 5 in the longitudinal direction has two tabs 51, and both of the two tabs 51 located at the same end of the core pack 5 are positive tabs or both of the two tabs are negative tabs. The two tabs 51 are respectively inserted into the mounting space 44 from the tab insertion openings 46 at the opposite ends of the insulating member 4, and the tabs 51 are welded and fixed to the second connection plate 22 located in the mounting space 44. Specifically, the tab 51 is wound from a side of the second insulating plate 42 facing the core pack 5 to a side of the second insulating plate 42 facing away from the core pack 5. Since the end of the second connection plate 22 is positioned in the receiving groove 420, the end of the second connection plate 22 is prevented from scratching the bending region of the tab 51. In this embodiment, the insulation member 4 is used to perform insulation protection and mechanical protection on the lead 2 and the tab 51.

Specifically, the battery is assembled in the following manner: in the initial state of the insulating member 4, the first insulating plate 41 and the second insulating plate 42 of the insulating member 4 are coplanar or have a large angle therebetween so as to weld the lead 2 and the tab 51. The lead 2 is inserted into the receiving groove 420, and then the tab 51 is wound around the end of the first insulating plate 41 and is stacked on the second connection plate 22 of the lead 2, and after the tab 51 is welded, the insulating member 4 is bent to bring the first insulating plate 41 and the second insulating plate 42 into a stacked state. The first insulating plate 41 can press the lead 2 and the tab 51 into the mounting space 44. The core pack 5 is assembled and then put into the outer shell 6, and the cover plate 1 and the outer shell 6 are welded and fixed.

The foregoing is merely exemplary of the present utility model, and those skilled in the art should not be considered as limiting the utility model, since modifications may be made in the specific embodiments and application scope of the utility model in light of the teachings of the present utility model.

Claims (10)

1. The utility model provides an insulating part, its characterized in that, including first insulation board and the second insulation board that the interval set up, first insulation board with form the installation space that is used for holding pin and utmost point ear between the second insulation board, the second insulation board orientation a side of first insulation board is provided with the holding tank, the notch orientation of holding tank the inside of installation space, the pin is inserted and is located in the installation space, and make the tip of pin is located in the holding tank, the utmost point ear is followed the tank bottom of holding tank inserts to the direction of notch in the installation space, and with the pin is connected.

2. The insulating member according to claim 1, wherein the number of the receiving grooves is two, the two receiving grooves are respectively located at opposite ends of the second insulating plate, and the two ends of the pin are respectively inserted into the two receiving grooves.

3. The insulator of claim 1, wherein the first and second insulator plates are integrally bent.

4. The insulator of claim 1, wherein the second insulating plate comprises a first plate, a second plate and a third plate, the first plate is parallel to and spaced apart from the first insulating plate, the third plate is positioned between the first plate and the first insulating plate, two ends of the second plate are respectively connected with the first plate and the third plate, and the accommodating groove is defined between the first plate, the second plate and the third plate.

5. The insulator of claim 4, wherein the length of the third plate is greater than or equal to the length of the tab.

6. The insulating member according to any one of claims 1 to 5, further comprising a third insulating plate provided at one end of the second insulating plate, and the third insulating plate being adjacent to the pin insertion port of the mounting void, a free end of the third insulating plate extending in a direction away from the first insulating plate.

7. An insulating member as claimed in any one of claims 1 to 5 wherein the width of the first insulating sheet is greater than the width of the second insulating sheet.

8. A battery top cover, characterized by comprising the insulating part according to any one of claims 1 to 7, further comprising a cover plate, a pole post and a pin, wherein the pole post is arranged on the cover plate in a penetrating manner, one end of the pin is connected with the pole post, the other end of the pin is connected with a pole lug, and one end of the pin, which is used for connecting the pole lug, is inserted into an installation gap.

9. The battery top cover of claim 8, wherein the pins are secured to the insulator by high temperature glue.

10. A battery, characterized by comprising the battery top cover according to claim 8 or 9, and further comprising a core pack, wherein the end of the core pack is provided with a tab, and the free end of the tab is inserted into the mounting gap along the direction from the bottom of the accommodating groove to the notch and is connected with the pin.

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