Battery monomer and electric equipment with same

Abstract

The utility model relates to a single battery and electric equipment with the single battery, the single battery comprises a shell, the shell is provided with an accommodating cavity, and the accommodating cavity is provided with an opening on a first end face of the shell; a first protrusion is arranged at the position, close to the opening, of the cavity wall of the shell. The battery cell is arranged in the accommodating cavity; the cover plate assembly comprises a cover plate and an insulating part, the cover plate is connected with the shell and seals the opening, and at least part of the cover plate is located on the outer side of the containing cavity and abuts against the first end face of the shell; the insulating part is positioned on the inner side of the accommodating cavity and is connected to the cover plate; at least part of the insulating part is located between the first protrusion and the battery cell and provided with a second protrusion, and the second protrusion abuts against the first protrusion. The first protrusion and the second protrusion are automatically matched, the cover plate assembly is positioned and supported, it is guaranteed that the cover plate assembly is just matched with the shell, the sealing performance before welding is improved, then the welding quality is improved, automatic matching can be achieved without additional tools in the welding process, and the production cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially relates to a battery monomer and electric equipment with it. BACKGROUND

[0002] The shell of the battery monomer is composed of a casing and a top cover, and the casing and the top cover are packaged by laser welding. For a blade battery, the casing of the blade battery is provided with two open ends, so that the top cover is welded at the two open ends. The prior art first places two top covers at the two open ends of the casing, then clamps the two top covers and the casing together by using a clamp, and then rotates the casing to perform peripheral welding.

[0003] The casing is prone to bending deformation under the clamping of the clamp when the casing and the top cover are welded by using the above-mentioned method, thereby affecting the quality of the blade battery.

[0004] Therefore, there is a need for a battery monomer and electric equipment with the same, which can support and cooperate with each other without the aid of additional tools, solve the problem of poor welding in production and manufacturing, and improve production efficiency. SUMMARY

[0005] In order to overcome the shortcomings of the prior art, the utility model provides a battery monomer and electric equipment with the same.

[0006] The technical scheme of the utility model is as follows:

[0007] A battery monomer comprises:

[0008] A casing has a receiving cavity, and the receiving cavity is formed with an opening at a first end face of the casing; a first protrusion is arranged at a position of a cavity wall of the casing close to the opening;

[0009] An electric core is arranged in the receiving cavity.

[0010] A cover plate assembly comprises a cover plate and an insulating piece, the cover plate is connected with the casing and closes the opening, at least a part of the cover plate is located outside the receiving cavity and abuts against the first end face of the casing, the insulating piece is located inside the receiving cavity and is connected with the cover plate, at least a part of the insulating piece is located between the first protrusion and the electric core and is provided with a second protrusion, and the second protrusion abuts against the first protrusion.

[0011] As a further improvement of the utility model, the cover plate comprises a main body part and a step part which are integrally formed, part of the main body part is arranged in the accommodating cavity through the opening, the step part is located outside the accommodating cavity, the step part is connected to the outer peripheral surface of the main body part, and the step part and the first end surface of the shell abut.

[0012] As a further improvement of the utility model, the insulating part comprises a base plate and a side plate, the base plate is connected to the cover plate, the side plate and the base plate are integrally formed, the side plate protrudes from one side of the base plate away from the cover plate, and the second protrusion is arranged on the side of the side plate facing the cavity wall of the shell.

[0013] As a further improvement of the utility model, one end of the side plate away from the cover plate is integrally formed with an abutting part, the abutting part abuts against the battery cell, the thickness of the side plate is d1, the thickness of the base plate is d2, and the width of the abutting part is d3, wherein d1 < d2 and d3 > d2.

[0014] As a further improvement of the utility model, a notch is arranged at the connection between the side of the side plate away from the cavity wall of the shell and the side of the base plate away from the cover plate.

[0015] As a further improvement of the utility model, the side of the first protrusion facing the insulating part is a spherical surface, and the side of the second protrusion facing the cavity wall of the shell is a spherical surface.

[0016] As a further improvement of the utility model, two side plates are arranged, the two side plates are oppositely arranged along the length direction of the base plate, each side plate is provided with the second protrusion, and the second protrusion and the first protrusion are in one-to-one correspondence.

[0017] As a further improvement of the utility model, the shell has two first end surfaces oppositely arranged along the length direction thereof, the two first end surfaces of the shell are provided with the opening, and the cavity wall of the shell is provided with the first protrusion at positions close to the two openings, respectively.

[0018] As a further improvement of the utility model, the utility model further comprises an insulating film, the insulating film covers the battery cell, and the insulating film is provided with a clamping hole matched with the second protrusion.

[0019] A kind of electric equipment, including above-mentioned battery cell.

[0020] According to the above-mentioned scheme of the utility model, the utility model has the beneficial effects that:

[0021] 1. The battery monomer of the utility model, through the abutment of at least part of the cover plate and the first end surface of the shell, and the abututment of the first protrusion of the shell and the second protrusion of the insulating piece, the cover plate assembly can be pre-fixed at the opening of the shell before the cover plate and the shell are welded, and then the cover plate and the shell can be clamped together without the aid of additional clamps, which simplifies the process, speeds up the welding efficiency and improves the welding quality. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is the structure sectional view of the utility model;

[0023] Figure 2 It is the local enlarged view of the utility model A place;

[0024] Figure 3 It is the discrete schematic view of the shell and the cover plate assembly of the utility model;

[0025] Figure 4 It is the structure schematic view of the insulating film of the utility model.

[0026] In the drawing: 1, shell;11, accommodating cavity;2, first protrusion;21, first protrusion part;22, first connecting part;23, first groove;3, electric core;4, cover plate;41, main body part;42, step part;5, insulating piece;51, base plate;52, side plate;53, abutting part;6, second protrusion;61, second protrusion part;62, second connecting part;63, second groove;7, notch;8, insulating film;81, clamping hole;82, first area;83, second area;84, third area;85, fourth area;86, fifth area;87, first extension part;88, second extension part. DETAILED DESCRIPTION

[0027] The technical scheme of the utility model will be described clearly and completely in combination with the drawings, obviously, the described embodiment is a part of the embodiment of the utility model, instead of all the embodiment. Based on the embodiment in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor belong to the scope of protection of the utility model.

[0028] In the description of the utility model, it is necessary to explain that the orientation or position relation indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is the orientation or position relation based on the orientation or position relation shown in the drawing, and is only for the convenience of describing the utility model and simplifying the description, and cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, a particular orientation and operation, therefore, cannot be understood as the limitation of the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0029] In the description of the utility model, it needs to explain, unless another explicit provision and limitation, the term "installation", "link", "connection" should do the broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected, can be mechanical connection, also can be electrical connection, can be direct connection, also can through the intermediate medium indirectly connect, can be two element inside the intercommunication. For ordinary skilled person in the art, the above-mentioned term can be understood in the specific meaning in the utility model according to specific circumstances. In addition, the technical features involved in different embodiments of the utility model described below can be combined with each other as long as they do not conflict with each other.

[0030] Reference Figure 1 -3, the utility model provides a battery monomer, comprising:

[0031] Shell 1 has accommodating cavity 11, and the opening is formed in the first end surface of shell 1 in accommodating cavity 11;The cavity wall of shell 1 is provided with first protrusion 2 near the position of opening;

[0032] Electricity core 3 is arranged in accommodating cavity 11;

[0033] Cover plate assembly, including cover plate 4 and insulating piece 5, cover plate 4 and shell 1 are connected and close the opening, and at least part of cover plate 4 is located on the outside of accommodating cavity 11 and is in abutment with the first end surface of shell 1;Insulating piece 5 is located on the inside of accommodating cavity 11 and is connected to cover plate 4;At least part of insulating piece 5 is located between first protrusion 2 and electricity core 3 and is provided with second protrusion 6, and second protrusion 6 and first protrusion 2 are in abutment.

[0034] Wherein, first protrusion 2 can adopt the following two structures:

[0035] Structure one: first protrusion 2 is integrally formed with shell 1, for example, the side wall of shell 1 is stamped, so that the inside surface of the side wall of shell 1 forms first protrusion 2, and recess structure is formed on the outside surface of the side wall of shell 1;

[0036] Structure two: first protrusion 2 is separately arranged with shell 1, and first protrusion 2 is fixed on the cavity wall of shell 1 by welding, of course, first protrusion 2 can also be fixed on the cavity wall of shell 1 by bonding or injection molding or clamping.

[0037] Wherein, it needs to explain, first protrusion 2 can be made of aluminum alloy material, can also be made of thermoplastic elastomer, such as TPV, TP0, or rubber, silicone, etc.;Shell 1 is made of aluminum alloy material.

[0038] In the present utility model, the cover plate assembly is covered at the opening of the housing 1. Among them, the cover plate 4 abuts against the first end face of the housing 1, and the second protrusion 6 on the insulating member 5 abuts against the first protrusion 2 after passing over the first protrusion 2. That is to say, because the cover plate 4 abuts against the first end face of the housing 1, the cover plate assembly is blocked by the housing 1 and cannot continue to approach the battery cell 3. Also, because the second protrusion 6 on the insulating member 5 abuts against the first protrusion 2 after passing over the first protrusion 2, the cover plate assembly is blocked by the first protrusion 2 and cannot continue to move away from the battery cell 3. Thus, before the cover plate and the housing are welded, the purpose of pre-fixing the cover plate assembly at the opening of the housing is achieved. Furthermore, the cover plate and the housing can be clamped together without the aid of additional fixtures, simplifying the process, accelerating the welding efficiency, and improving the welding quality. As an embodiment of the present utility model, the cover plate 4 includes a main body portion 41 and a stepped portion 42 formed integrally. A part of the main body portion 41 passes through the opening and is disposed within the accommodation cavity 11; the stepped portion 42 is located outside the accommodation cavity 11, and the stepped portion 42 is connected to the outer peripheral surface of the main body portion 41; the stepped portion 42 abuts against the first end face of the housing 1.

[0039] Thus, it can be understood that a part of the main body portion 41 penetrates into the accommodation cavity from the opening, and another part of the main body portion 41 is located outside the accommodation cavity. The stepped portion 42 is located outside the housing 1, and the stepped portion 42 is connected to the part of the main body portion 41 located outside the housing 1. Here, the stepped portion 42 can extend along the circumferential direction of the main body portion 41 to form an annular structure. Of course, multiple stepped portions 42 can also be provided, and the multiple stepped portions 42 are evenly distributed along the circumferential direction of the main body portion 41. The side of the stepped portion 42 facing the housing 1 abuts against the first end face of the housing 1. Here, the abutment means that the side of the stepped portion 42 facing the housing 1 contacts the first end face of the housing 1.

[0040] By designing the cover plate 4 into a structure similar to a "convex" shape and using the insertion of the main body portion 41 of the cover plate 4 and the opening, the limit of the cover plate assembly entering the housing is realized, and the position of the cover plate assembly entering the housing is accurately controlled, making the assembly of the cover plate 4 and the housing 1 faster.

[0041] It should be noted that in order to prevent the weld formed by the welding of the stepped portion 42 and the housing 1 from protruding beyond the outer side surface of the housing 1, the width of the stepped portion 42 can be designed to be less than the thickness of the side wall of the housing 1. Of course, in order to ensure the abutment between the stepped portion 42 and the housing 1, the width of the stepped portion 42 can be designed to be greater than 1 / 3 of the thickness of the side wall of the housing 1.

[0042] As an embodiment of the present utility model, the insulating member 5 includes a substrate 51 and a side plate 52. The substrate 51 is connected to the cover plate 4; the side plate 52 and the substrate 51 are formed integrally, and the side plate 52 protrudes from the side of the substrate 51 facing away from the cover plate 4; a second protrusion 6 is provided on the side of the side plate 52 facing the cavity wall of the housing 1. Among them, the second protrusion 6 can adopt the following two structures:

[0043] Structure one: the second protrusion 6 is integrally formed with the side plate 52, for example, the second protrusion 6 is formed on the side plate 52 of the insulating piece 5 by injection molding;

[0044] Structure two: the second protrusion 6 is separately arranged with the side plate 52, and the second protrusion 6 can be fixed on the side plate 52 by means of hot melting, bonding or clamping.

[0045] It should be noted that the second protrusion 6 can be made of plastic, thermoplastic elastomer such as TPV, TPO, or rubber and silicone.

[0046] Further, in order to make the second protrusion 6 more easily pass over the first protrusion 2 during the assembly of the cover plate assembly and the shell, the second protrusion 6 is designed to intersect the first protrusion 2 closer to the battery cell 3, the side of the first protrusion 2 facing the side of the insulating piece 5 is spherical, and the side of the second protrusion 6 facing the cavity wall of the shell 1 is spherical. The spherical structure of the first protrusion 2 and the second protrusion 6 can effectively reduce the resistance between them, which is conducive to the second protrusion 6 passing over the first protrusion 2 and achieving mutual cooperation between them.

[0047] Specifically, the first protrusion 2 includes a first protruding portion 21 and a first connecting portion 22, the first connecting portion 22 connects the first protruding portion 21 and the shell 1, the second protrusion 6 includes a second protruding portion 61 and a second connecting portion 62, the second connecting portion 62 connects the second protruding portion 61 and the side plate 52, the surface of the first connecting portion 22 close to the second protruding portion 61 is provided with a first groove 23, and the surface of the second connecting portion 62 close to the first protruding portion 21 is provided with a second groove 63. Preferably, the cross section of the first protruding portion 21 is circular, and the cross section of the first groove 23 is circular arc when the long side of the cover plate 4 is taken as the direction of movement of the cover plate 4, and the structure of the second protrusion 6 is the same as that of the first protrusion 2.

[0048] Further, in order to make the second protrusion 6 more easily pass over the first protrusion 2 during the assembly of the cover plate assembly and the shell, the second protrusion 6 is designed to intersect the first protrusion 2 closer to the battery cell 3, the side of the first protrusion 2 facing the side of the insulating piece 5 is spherical, and the side of the second protrusion 6 facing the cavity wall of the shell 1 is spherical. The spherical structure of the first protrusion 2 and the second protrusion 6 can effectively reduce the resistance between them, which is conducive to the second protrusion 6 passing over the first protrusion 2 and achieving mutual cooperation between them.

[0049] In this way, it can be understood that when the second protrusion 6 is arranged on the side plate 52 of the insulating piece 5, the side of the side plate 52 away from the cavity wall of the shell 1 and the side of the base plate 51 away from the cover plate 4 are connected by the groove surface constituting the notch 7.

[0050] Specifically, when the second protrusion 6 crosses the first protrusion 2, the side plate 52 is subjected to a pushing force in the direction of the battery cell 3, and under the action of the notch 7, the reverse resistance received by the side plate 52 is reduced, so that the side plate 52 is bent in the direction of the battery cell 3 to a certain extent, so that the second protrusion 6 smoothly passes through the first protrusion 2, and the assembly efficiency between the cover plate assembly and the shell 1 is improved.

[0051] It should be noted that the cross section of the notch 7 can be an arc or a "V" shape.

[0052] In addition, it should be noted that while the insulating piece 5 is provided with the notch 7, the side surface of the first protrusion 2 towards the insulating piece 5 can also be designed as a spherical surface, and the side surface of the second protrusion 6 towards the cavity wall of the shell 1 can also be designed as a spherical surface, so that the second protrusion 6 is more easily passed through the first protrusion 2.

[0053] Further, in order to ensure that the side plate 52 can prevent the battery cell 3 from moving in the shell 1 while ensuring that the side plate 52 will not damage the battery cell 3, an abutting portion 53 is integrally formed at the end of the side plate 52 away from the cover plate 4, the abutting portion 53 abuts against the battery cell 3, the thickness of the side plate 52 is d1, the thickness of the base plate 51 is d2, and the width of the abutting portion 53 is d3, d1 < d2, and d3 > d2.

[0054] Since the second protrusion 6 needs to pass through the first protrusion 2 when the cover plate assembly is assembled with the shell 1, the thickness of the side plate 52 is designed to be thinner after meeting the necessary assembly strength, which is more conducive to the second protrusion 6 passing through the first protrusion 2. The insulating piece 5 and the battery cell 3 are in abutting relationship, and since the thickness of the side plate 52 is relatively thin, if the side plate 52 directly abuts against the battery cell 3, it is easy to cause damage to the battery cell 3. Therefore, when d1 < d2 and d3 > d2 are met, the abutting portion 53 abuts against the battery cell 3, reducing the risk of damage to the battery cell 3 by the insulating piece 5, improving the service life of the battery cell 3, and also ensuring the assembly of the second protrusion 6 and the first protrusion 2.

[0055] Further, in order to make the assembly of the cover plate assembly and the shell more stable, the insulating piece 5 includes two side plates 52, the two side plates 52 are oppositely arranged along the length direction of the base plate 51; each side plate 52 is provided with a second protrusion 6; the second protrusion 6 and the first protrusion 2 are in one-to-one correspondence, the second protrusion 6 is arranged on the two oppositely arranged side plates 52 and cooperates with the corresponding first protrusion 2, which can realize the abutting cooperation of the cover plate assembly and the shell 1 at multiple positions at the same time, improve the abutting strength between the cover plate assembly and the shell 1, further improve the assembly quality of the two, and improve the welding quality. Of course, the number of first protrusions 2 and second protrusions 6 can also be increased according to specific use requirements.

[0056] As an embodiment of the utility model, the shell 1 has two first end faces oppositely arranged along the length direction thereof, and the two first end faces of the shell 1 are both provided with openings, i.e. the shell 1 is a hollow structure, and the two openings of the shell 1 are oppositely arranged; the cavity wall of the shell 1 is both provided with a first protrusion 2 near the position of the two openings, respectively, and the shell 1 is abutted and matched with the two cover plate assemblies through the two openings, respectively.

[0057] As an embodiment of the utility model, the battery monomer further comprises an insulation film 8, the insulation film 8 covers the battery cell 3, the insulation film 8 is provided with a clamping hole 81 matched with the second protrusion 6, the position relationship between the insulation film 8 and the cover plate assembly is determined through the clamping of the second protrusion 6 and the clamping hole 81, and the insulation film 8 can fix the folded cover plate assembly to a certain extent, so that the subsequent shell entering of the cover plate assembly is facilitated.

[0058] Specifically, the insulation film 8 comprises a first region 82, a second region 83, a third region 84, a fourth region 85 and a fifth region 86 connected in sequence, the first region 82 and the fifth region 86 are at least partially overlapped and connected together to obtain a cavity for accommodating the battery cell 3; one side of the second region 83 or one side of the fourth region 85 is provided with a first extension part 87 and a second extension part 88, the first extension part 87 and the second extension part 88 are arranged on one side of the length direction of the battery cell 3, and to a certain extent, the first extension part 87 and the second extension part 88 play a role in blocking the movement of the battery cell 3 in the length direction, and the first region 82 and the third region 84 are both provided with the clamping hole 81.

[0059] The utility model provides a kind of electric equipment, comprising the battery monomer described above.

[0060] In summary, the utility model provides a kind of battery monomer and the electric equipment with it, adopt the structure of the first protruding 2 on shell 1 and the second protruding 6 on cover plate assembly, when entering shell, the second protruding 6 crosses the first protruding 2, the mutual cooperation between the two positioning and supporting cover plate assembly, ensure that cover plate assembly and shell 1 just cooperate, the sealing of cover plate assembly and shell 1 before welding is better, it is favorable to improve welding quality, and cover plate assembly and shell 1 can be automatically matched without the aid of additional tooling when welding, this structure can simplify manufacturing process, save equipment energy consumption, reduce production cost;Step portion 42 can realize the limiting of cover plate assembly into shell, accurately control the position of cover plate assembly into shell, avoid cover plate assembly into shell position too deep to cause damage to electric core 3, and avoid causing other unnecessary influence;Add the abutting portion 53 with the width wider and the electric core 3 abut, can effectively increase the contact area between insulating part 5 and electric core 3, thereby reduce the risk of damage to electric core 3 by insulating part 5, improve the service life of electric core 3;Notch 7 can make the reverse resistance received by side plate 52 reduce, realize that side plate 52 bends in the direction of electric core 3 to a certain extent, so that the second protruding 6 crosses the first protruding 2, improve the assembly efficiency between cover plate assembly and shell 1;The structure of the first protruding 2 and the second protruding 6 is spherical, which can effectively reduce the resistance between the first protruding 2 and the second protruding 6, and facilitate the second protruding 6 to cross the first protruding 2 and realize the mutual cooperation between them;The position relationship between the insulating film 8 and the cover plate assembly is determined by the clamping of the second protruding 6 and the clamping hole 81, and the insulating film 8 can fix the folded cover plate assembly to a certain extent, which is convenient for the subsequent shell of the cover plate assembly.

[0061] It should be emphasized that: the above is only the preferred embodiment of the utility model, and does not limit the utility model in any form, any simple modification, equivalent change and modification of the above embodiment according to the technical essence of the utility model still belongs to the scope of the utility model technical scheme.

Claims

1. A battery cell, characterized by, The application relates to a battery shell. The battery shell comprises a shell (1) with a containing cavity (11) formed with an opening at a first end face of the shell (1); a first protrusion (2) is arranged on a cavity wall of the shell (1) close to the opening; An electric core (3) is arranged in the containing cavity (11); A cover plate assembly comprises a cover plate (4) and an insulating piece (5); the cover plate (4) is connected with the shell (1) and seals the opening; at least part of the cover plate (4) is arranged outside the containing cavity (11) and abuts against the first end face of the shell (1); the insulating piece (5) is arranged inside the containing cavity (11) and is connected with the cover plate (4); at least part of the insulating piece (5) is arranged between the first protrusion (2) and the electric core (3) and is provided with a second protrusion (6); the second protrusion (6) abuts against the first protrusion (2).

2. The battery cell of claim 1, wherein, The cover plate (4) comprises an integral main body (41) and a stepped portion (42); part of the main body (41) is arranged in the containing cavity (11) through the opening; the stepped portion (42) is arranged outside the containing cavity (11) and is connected with the outer circumferential surface of the main body (41); the stepped portion (42) abuts against the first end face of the shell (1).

3. The battery cell of claim 1, wherein, The insulating piece (5) comprises a base plate (51) and a side plate (52); the base plate (51) is connected with the cover plate (4); the side plate (52) is integrally formed with the base plate (51) and protrudes from one side of the base plate (51) away from the cover plate (4); the second protrusion (6) is arranged on one side of the side plate (52) facing the cavity wall of the shell (1).

4. The battery cell of claim 3, wherein, One end of the side plate (52) away from the cover plate (4) is integrally formed with an abutting portion (53) abutting against the electric core (3); the thickness of the side plate (52) is d1, the thickness of the base plate (51) is d2, and the width of the abutting portion (53) is d3; d1 < d2 and d3 > d2.

5. The battery cell of claim 3, wherein, A notch (7) is arranged at the connection between one side of the side plate (52) away from the cavity wall of the shell (1) and one side of the base plate (51) away from the cover plate (4).

6. The battery cell of claim 3, wherein, The side facing the insulating piece (5) of the first protrusion (2) is a spherical surface, and the side facing the cavity wall of the shell (1) of the second protrusion (6) is a spherical surface.

7. The battery cell of any one of claims 3-6, wherein, Two side plates (52) are arranged; the two side plates (52) are oppositely arranged along the length direction of the base plate (51); each side plate (52) is provided with the second protrusion (6); the second protrusion (6) and the first protrusion (2) are in one-to-one correspondence.

8. The battery cell of any one of claims 1-6, wherein, The shell (1) has two first end faces oppositely arranged along the length direction of the shell (1); the two first end faces of the shell (1) are both provided with the opening; the cavity wall of the shell (1) is provided with the first protrusion (2) close to the two openings respectively.

9. The battery cell of any one of claims 1-6, wherein, Further comprising an insulating film (8) covering the electric core (3), the insulating film (8) is provided with a clamping hole (81) clamped with the second protrusion (6).

10. An electric device, characterized by The battery cell as claimed in any one of claims 1 to 9.

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