CN215911482U - Battery cover and battery module with same - Google Patents

Abstract

The utility model discloses a battery cover and a battery module with the same, wherein the battery cover comprises: apron, utmost point post and insulating assembly, wherein, be formed with the mounting hole on the apron, utmost point post is located in the mounting hole, and insulating assembly establishes between apron and utmost point post, and at least some of insulating assembly is located between the internal perisporium and the utmost point post of mounting hole to with utmost point post and apron isolated, insulating assembly includes relative independent fashioned first insulating part and second insulating part, and first insulating part and second insulating part all are the periphery side that the utmost point post was located to the annular and all overlap. According to the battery cover, the insulating assembly comprises the first insulating part and the second insulating part which are formed relatively independently, so that the assembly flexibility of the insulating assembly can be improved well, and the mounting difficulty of the insulating assembly is reduced. In addition, first insulating part and second insulating part all are the periphery side that the annular just all overlaps and locate utmost point post, do benefit to the insulating effect that promotes insulating subassembly to utmost point post and apron, and insulating properties is good.

Description

Battery cover and battery module with same

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery cover and a battery module with the same.

Background

With the continuous development of the battery industry, lithium ion batteries are widely used in the fields of vehicles, mobile devices and the like due to the advantage of high energy density. Among them, the sealing effect and the insulating property of the lithium ion battery directly affect the service life thereof. In the related art, although the sealing structure is used for sealing and insulating, the sealing structure is affected by the irregular appearance of the pole and the installation position of the pole, so that the sealing structure is high in installation difficulty, small in application range and not beneficial to the development of the industry.

SUMMERY OF THE UTILITY MODEL

The utility model provides a battery cover which has the advantage of low assembly difficulty.

The utility model also provides a battery module comprising the battery cover.

The battery cover according to an embodiment of the present invention includes: the cover plate is provided with a mounting hole; the pole is arranged in the mounting hole; the insulating assembly, the insulating assembly is established the apron with between the utmost point post, at least some of insulating assembly is located the internal perisporium of mounting hole with between the utmost point post, in order to incite somebody to action utmost point post with the apron is isolated, the insulating assembly includes relative independent fashioned first insulating part and second insulating part, first insulating part with the second insulating part all is the annular and all overlaps and locates the periphery side of utmost point post.

According to the battery cover provided by the embodiment of the utility model, the insulating assembly comprises the first insulating part and the second insulating part which are relatively independently formed, so that the assembly flexibility of the insulating assembly can be better improved, and the mounting difficulty of the insulating assembly is favorably reduced. In addition, first insulating part and second insulating part all are the periphery side that the annular just all overlaps and locate utmost point post, do benefit to the insulating effect that promotes insulating subassembly to utmost point post and apron, and insulating properties is good.

In some embodiments of the utility model, the first insulating member is injection-molded and wrapped on the pole by means of one-time injection molding and wrapping, and the second insulating member is injection-molded and wrapped on the cover plate by means of two-time injection molding and wrapping.

In some embodiments of the utility model, the pole comprises a pole body and a limit flange formed on the outer circumferential wall of the pole body, a limit groove is formed on the inner circumferential wall of the mounting hole, the limit flange is accommodated in the limit groove, the first insulator is sleeved on the outer circumferential side of the limit flange, and the second insulator is sleeved on the outer circumferential side of the pole body.

In some embodiments of the present invention, a receiving groove is formed on an inner peripheral wall of the first insulating member, and a portion of the position-restricting flange is received in the receiving groove.

In some embodiments of the present invention, the first insulating member includes a first insulating member body and a positioning protrusion, the first insulating member body is sleeved on an outer peripheral side of the limiting flange, the positioning protrusion is formed on an axial end surface of the first insulating member body, which is away from the second insulating member, the limiting groove has a first side wall and a second side wall opposite to each other in the axial direction of the pole, wherein the first side wall is away from the second insulating member relative to the second side wall, the first side wall is formed with a positioning groove, and the positioning protrusion is accommodated in the positioning groove.

In some embodiments of the present invention, the first insulator is injection molded around the position-limiting flange by injection molding.

In some embodiments of the utility model, the post body comprises a first post body and a second post body located on both axial sides of the limit flange, the first post body is adjacent to the outer surface of the cover plate, the limit groove has a first side wall and a second side wall opposite to each other in the axial direction of the post, wherein the first side wall is far away from the second insulating member opposite to the second side wall, and the second insulating member comprises: the first insulating part is coated on the outer surface of the cover plate; a second insulating part sleeved on the outer peripheral side of the first pole body; a third insulating portion located between the second sidewall and the position-defining flange.

In some embodiments of the present invention, the second insulating member is injection-molded and wrapped on the cover plate by means of injection molding and encapsulation.

In some embodiments of the utility model, the insulation assembly further comprises: the sealing ring, utmost point post body is including being located first utmost point post body and the second utmost point post body of limiting flange axial both sides, first utmost point post body is close to the surface of apron, the second insulator cover is located the periphery side of first utmost point post body, the sealing washer cover is established the periphery side of second utmost point post body.

The battery module according to an embodiment of the present invention includes: at least one battery cell; the casing, the casing includes above-mentioned battery cover, battery monomer locates in the casing.

According to the battery module, the insulating component comprises the first insulating part and the second insulating part which are formed relatively independently, so that the assembly flexibility of the insulating component can be improved well, and the installation difficulty of the insulating component is reduced. In addition, first insulating part and second insulating part all are the periphery side that the utmost point post was located to annular and all overlap, do benefit to the insulating effect that promotes insulating assembly to utmost point post and apron, and insulating properties is good

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

Fig. 1 is an exploded view of a battery cover according to an embodiment of the present invention;

fig. 2 is a perspective view of a battery cover according to an embodiment of the present invention;

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

FIG. 4 is a top view of a battery cover according to an embodiment of the present invention;

FIG. 5 is a cross-sectional view taken along A-A of FIG. 4;

FIG. 6 is an enlarged view of area B of FIG. 5;

fig. 7 is a perspective view of the terminal post of the battery cover and the first insulating member according to the embodiment of the present invention;

fig. 8 is a bottom side view of the terminal post of the battery cover and the first insulating member according to the embodiment of the present invention;

fig. 9 is a front view of the terminal post of the battery cover and the first insulating member according to the embodiment of the present invention;

fig. 10 is a top view of a cover plate of a battery cover according to an embodiment of the present invention;

FIG. 11 is a cross-sectional view taken along line C-C of FIG. 10;

fig. 12 is an enlarged view of the area D in fig. 11.

Reference numerals:

a battery cover 100;

a cover plate 1; a mounting hole 11; a limiting groove 12; a first sidewall 121; a second sidewall 122; a positioning groove 1221; a crimping edge 13; a support table 14; a first through hole 15;

a pole 2; a post body 21; a first pole body 211; a second pole body 212; a position-defining flange 22;

an insulating assembly 3; a first insulating member 31; an accommodation groove 311; a first insulator body 312; a positioning projection 313; a second insulating member 32; a first insulating portion 321; a second insulating portion 322; a third insulating portion 323; a seal ring 33; the first seal portion 331; the second seal portion 332;

a lower plastic 4; a mounting groove 41; a second through hole 42; an explosion-proof valve 5; explosion-proof valve patch 6.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.

The following disclosure provides many different embodiments, or examples, for implementing different features of the utility model. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize the applicability of other processes and/or the use of other materials.

A battery cover 100 according to an embodiment of the present invention is described below with reference to the accompanying drawings.

As shown in fig. 1 to 3, a battery cover 100 according to an embodiment of the present invention includes: the cover plate 1, the pole 2 and the insulating component 3. Wherein, a mounting hole 11 is formed on the cover plate 1, and the pole 2 is arranged in the mounting hole 11. From this for utmost point post 2 can be acceptd better in mounting hole 11, and in the assembly process of battery cover 100, be about to the in-process of utmost point post 2 equipment to apron 1, can fix a position the mounted position of utmost point post 2 fast through mounting hole 11, the location degree of difficulty when can reducing utmost point post 2 and install does benefit to the assembly efficiency who promotes battery cover 100.

Secondly, battery cover 100 includes two utmost point posts 2 of positive pole and negative pole usually, can connect two utmost point posts 2 better through apron 1, does benefit to the relative position who keeps two utmost point posts 2, and in addition, apron 1 can be better with the interior space interval of exterior space and battery module, does benefit to the interference killing feature who promotes battery module, and stability is high.

In addition, the mounting hole 11 has a good limiting effect on the pole column 2. For example, after the pole 2 is placed in the mounting hole 11, the mounting hole 11 can limit the freedom of movement of the pole 2 in the radial direction by the inner peripheral wall, so that the radial movement range of the pole 2 after mounting can be reduced. It will be appreciated that the bottom end of the post 2, i.e. the end of the post 2 remote from the external space, is typically electrically connected to the battery cell for charging and discharging the battery cell through the post 2. Consequently, through mounting hole 11 to utmost point post 2 spacing for 2 installation backs of utmost point post are fixed relatively for the position of apron 1, can avoid better leading to with the cracked risk of battery monomer's hookup location because of 2 removals of utmost point post, thereby can promote battery module's reliability.

As shown in fig. 4-6, the insulation assembly 3 is disposed between the cover plate 1 and the pole post 2. That is, the cover plate 1 and the pole post 2 can be well spaced apart by providing the insulating assembly 3, so that the cover plate 1 can be prevented from contacting the pole post 2. Therefore, the cover plate 1 can be electrically isolated from the pole 2 better in a physical isolation mode, so that the risk of electric conduction caused by contact of the cover plate 1 and the pole 2 is avoided. In one embodiment of the present invention, the cover plate 1 is a smooth aluminum plate, so that the cover plate 1 has the characteristics of high temperature resistance and high heat conduction efficiency while keeping the cover plate 1 light, which is beneficial to reducing the overall weight of the battery module and improving the stability of the battery module. Particularly, can separate light aluminum sheet and utmost point post 2 better through insulating subassembly 3 to guarantee the insulating effect between light aluminum sheet and the utmost point post 2, and then can avoid the electrically conductive safety risk of light aluminum sheet.

Wherein at least a part of the insulation component 3 is positioned between the inner peripheral wall of the mounting hole 11 and the pole 2 to isolate the pole 2 from the cover plate 1. A part of the insulating assembly 3 can be located between the inner peripheral wall of the mounting hole 11 and the pole 2, that is, the insulating assembly 3 at least comprises a part located between the inner wall of the mounting hole 11 and the pole 2 and a part not located between the inner wall of the mounting hole 11 and the pole 2, and the part of the insulating assembly 3 located between the inner peripheral wall of the mounting hole 11 and the pole 2 can better avoid the contact between the pole 2 and the cover plate 1, so that the electrical isolation between the pole 2 and the cover plate 1 is realized; it is also possible that the insulating member 3 is entirely located between the inner peripheral wall of the mounting hole 11 and the pole 2, which is not particularly limited herein.

Further, the insulation assembly 3 includes a first insulation member 31 and a second insulation member 32 which are formed relatively independently, and the first insulation member 31 and the second insulation member 32 are both annular and are both sleeved on the outer peripheral side of the pole 2. That is, the first insulating member 31 is formed independently of the second insulating member 32, and the second insulating member 32 is formed independently of the first insulating member 31. Therefore, in the assembly process of the battery cover 100, the assembly flexibility of the insulating assembly 3 can be improved well, and the reduction of the installation difficulty of the insulating assembly 3 is facilitated.

Secondly, in the assembly process of the battery cover 100, the first insulating part 31 and the second insulating part 32 can be sequentially sleeved on the outer peripheral side of the pole 2 according to a certain sequence, so that interference in the installation process of the first insulating part 31 and the second insulating part 32 can be better avoided, and the installation efficiency of the insulating assembly 3 is improved.

In addition, in the circumference of the outside of the pole column 2, the first insulating part 31 and the second insulating part 32 can better separate the pole column 2 from the inner circumferential wall of the mounting hole 11, that is, the outer circumferential wall of the pole column 2 is not in contact with the cover plate 1 in the circumferential direction, the insulating effect of the insulating assembly 3 on the pole column 2 and the cover plate 1 is further improved, and the insulating performance is good.

According to the battery cover 100 of the embodiment of the utility model, the insulating component 3 comprises the first insulating part 31 and the second insulating part 32 which are formed relatively independently, so that the assembly flexibility of the insulating component 3 can be improved well, and the installation difficulty of the insulating component 3 can be reduced. In addition, first insulating part 31 and second insulating part 32 all are the periphery side that the annular just all overlaps and locate utmost point post 2, do benefit to promote insulating subassembly 3 to utmost point post 2 and apron 1's insulating effect, and insulating properties is good.

In some embodiments of the present invention, the first insulating member 31 is injection-molded and wrapped on the pole 2 by one-time injection molding and encapsulation. It can be understood that the melted injection molding material can be well attached to the pole 2 and the cover plate 1 in the injection molding encapsulation process. From this, first insulating part 31 through injection moulding rubber coating shaping can be better laminated on utmost point post 2, does benefit to the stability of being connected of promoting first insulating part 31 and utmost point post 2. And, make through melting the flow of back injection molding material, can better adaptation utmost point post 2 of different appearances, do benefit to and reduce the installation degree of difficulty of first insulating part 31, and application scope is wide.

In addition, the second insulating member 32 is injection-molded and wrapped on the cover plate 1 by means of two-time injection molding and encapsulation. From this, second insulating part 32 through injection moulding can laminate better on apron 1, does benefit to and promotes second insulating part 32 and apron 1's stability of being connected to guarantee that second insulating part 32 can separate apron 1 and utmost point post 2 steadily, thereby guarantee second insulating part 32's insulating effect. Moreover, the cover plates 1 in different shapes can be better adapted through the flow of the injection molding material after melting, the installation difficulty of the second insulating part 32 is favorably reduced, and the application range is wide.

In a specific example, in the assembly process of the battery cover 100, the first insulating member 31 may be first injection-molded on the terminal post 2 (as shown in fig. 7-9), then the integrated member formed by the first insulating member 31 and the terminal post 2 is placed in the mounting hole 11, then the injection-molded material is filled between the terminal post 2 and the cover plate 1 and then cooled again in an injection-molding and encapsulation manner, so that the molded second insulating member 32 not only has good insulating performance, but also the second insulating member 32 can better seal the gap between the terminal post 2 and the cover plate 1, that is, the second insulating member 32 has good sealing effect, so that the battery module has good insulating and sealing performance at the same time, and the stability of the battery module is improved.

It should be noted that the first insulating member 31 and the second insulating member 32 may be made of a soft plastic material, for example, the injection molding material may be PPS (polyphenylene sulfide) or polypropylene (polypropylene), and is not limited herein.

In some embodiments of the present invention, as shown in fig. 3 and 6, the pole 2 includes a pole body 21 and a limit flange 22 formed on an outer circumferential wall of the pole body 21, a limit groove 12 is formed on an inner circumferential wall of the mounting hole 11, and the limit flange 22 is received in the limit groove 12. Specifically, the limiting flange 22 protrudes out of the peripheral wall of the post body 21 and extends around the peripheral wall of the post body 21, and the limiting groove 12 extends towards the direction departing from the axis of the post 2. Therefore, the limiting flange 22 is placed in the limiting groove 12, so that the movement freedom degree of the limiting flange 22 can be better limited by the side wall opposite to the limiting groove 12 in the axial direction of the pole 2. Therefore, the pole 2 can be well prevented from falling off from the mounting hole 11 through the limit of the limit groove 12 on the pole 2. In addition, can avoid better because of utmost point post 2 removes the cracked risk that leads to with battery monomer hookup location by a wide margin, do benefit to the security and the reliability that promote battery module.

Further, the first insulating member 31 is disposed on the outer peripheral side of the limit flange 22, and the second insulating member 32 is fitted on the outer peripheral side of the pole body 21. Therefore, the first insulating part 31 and the second insulating part 32 can better realize the electrical isolation between the pole 2 and the cover plate 1 on the outer periphery side of the limiting flange 22 and the pole body 21, and the insulating effect of the insulating assembly 3 is ensured. In addition, first insulating part 31 can restrict the radial ascending activity degree of freedom of limit flange 22 betterly for second insulating part 32 can restrict the radial ascending activity degree of freedom of utmost point post body 21 betterly, further restricts utmost point post 2's position, can avoid better because of utmost point post 2 removes the risk that leads to with the fracture of battery monomer connected position by a wide margin, does benefit to the security and the reliability that promote battery module.

In some embodiments of the present invention, a receiving groove 311 is formed on the inner peripheral wall of the first insulating member 31, and a portion of the position-limiting flange 22 is received in the receiving groove 311. Specifically, the receiving groove 311 extends toward a direction away from the axis of the pole post 2, and a portion of the position-defining flange 22 is located between opposite side walls of the receiving groove 311, that is, in a radial direction of the position-defining flange 22, the position-defining flange 22 and the receiving groove 311 have a partial overlapping portion, so that the opposite side walls of the receiving groove 311 can better space the position-defining flange 22 and the position-defining groove 12 apart. As shown in fig. 3 and 6, the opposite side walls of the receiving groove 311 may be preferably spaced apart from both sides in the axial direction of the position restricting flange 22 by the position restricting groove 12. Therefore, the insulation effect of the first insulating part 31 on the limiting flange 22 and the cover plate 1 is further improved, and the insulation performance of the battery cover 100 is favorably improved.

In addition, the side wall opposite to the receiving groove 311 in the axial direction of the pole 2 can better limit the freedom of movement of the position-limiting flange 22, and the side wall opposite to the position-limiting groove 12 can better limit the freedom of movement of the first insulating member 31. From this, can promote 2 stability after installing of utmost point post, can avoid better leading to with the cracked risk of battery monomer hookup location because of utmost point post 2 removes by a wide margin, do benefit to the security and the reliability that promote battery module.

In some embodiments of the present invention, as shown in fig. 8 and 9, the first insulating member 31 includes a first insulating member body 312 and a positioning protrusion 313, the first insulating member body 312 is sleeved on the outer peripheral side of the limiting flange 22, and an axial end surface of the first insulating member body 312, which is far away from the second insulating member 32, is formed with the positioning protrusion 313. As shown in fig. 6 and 12, the limiting recess 12 has a first side wall 121 and a second side wall 122 opposite to each other in the axial direction of the pole 2, wherein the first side wall 121 is far away from the second insulating member 32 relative to the second side wall 122, a positioning recess 1221 is formed on the first side wall 121, and the positioning protrusion 313 is accommodated in the positioning recess 1221. That is to say, the first side wall 121 is opposite to the axial end face of the first insulator body 312 far away from the second insulator 32, that is, the positioning protrusion 313 and the positioning groove 1221 are oppositely arranged, which is beneficial to reducing the difficulty of matching the positioning protrusion 313 and the positioning groove 1221.

Specifically, in the assembly process of the battery cover 100, the first insulating member 31 can be firstly sleeved on the pole 2, then the pole 2 provided with the first insulating member 31 is placed in the mounting hole 11, and the positioning protrusion 313 is mounted in the positioning groove 1221, so that the first insulating member 31 can be quickly positioned, and the assembly efficiency of the battery cover 100 can be improved.

In addition, in the footpath of mounting hole 11, the relative lateral wall of positioning groove 1221 can restrict the activity degree of freedom of location arch 313 betterly to make the difficult ascending offset in position that takes place of first insulating part 31 after the installation, can avoid betterly rocking because of utmost point post 2 lead to with the cracked risk of battery monomer hookup location, do benefit to the security and the reliability that promote battery module.

In a specific example, as shown in fig. 10 to 12, the bottom of the inner peripheral wall of the mounting hole 11 protrudes toward the axial direction of the mounting hole 11 to form a support table 14, two positioning grooves 1221 symmetrical to the axial direction of the mounting hole 11 are formed on the upper wall surface of the support table 14, and positioning protrusions 313 corresponding to the two positioning grooves 1221 one to one are formed on the first insulator body 312. From this, through with positioning groove 1221 spacing to the protruding 313 in location, can prevent better that first insulating part 31 from rotating to can prevent well utmost point post 2 from rotating around the axial of mounting hole 11, can avoid better leading to with the cracked risk of battery monomer hookup location because of utmost point post 2 rotates, do benefit to the security and the reliability that promote battery module.

Further, the first insulating member 31 can be well lifted up by the support base 14, and as shown in fig. 6 and 12, the upper end of the inner peripheral wall of the mounting hole 11 is bent inward of the mounting hole 11 to form a curled edge 13, so that the freedom of movement of the stopper flange 22 upward is restricted by the curled edge 13. That is, the limiting groove 12 is formed between the curling edge 13 and the support platform 14 in the axial direction of the mounting hole 11, and when the battery cover 100 is assembled, the first insulating member 31 and the post 2 can be assembled and then placed on the support platform 14, and then the curling edge 13 is turned over to prevent the post 2 from falling off from the opening at the upper part of the mounting hole 11, so that the structural stability of the battery cover 100 can be ensured.

In some embodiments of the present invention, as shown in fig. 7 and 8, the first insulating member 31 is injection-molded around the position-defining flange 22 by injection molding. In the process of injection molding and encapsulation, it can be understood that the melted injection molding material can be well attached to the limiting flange 22, so that the first insulating part 31 after cooling molding can be well formed into an integrated structure with the pole 2, that is, the relative position of the first insulating part 31 and the pole 2 is kept fixed. From this, through the protruding 313 back of spacing location of positioning groove 1221, restrict utmost point post 2's the degree of freedom that moves simultaneously, can avoid better rocking because of utmost point post 2 leads to with the cracked risk of battery monomer hookup location, do benefit to the security and the reliability that promote battery module.

In addition, the process of the injection molding and encapsulation can be well adapted to the limiting flanges 22 with different shapes, deformation or damage caused by the fact that the limiting flanges 22 extrude the first insulating part 31 is avoided, the installation difficulty of the first insulating part 31 is reduced, and the reliability of the insulating assembly 3 is improved.

In some embodiments of the utility model, as shown in fig. 3, 6 and 12, the post body 21 comprises a first post body 211 and a second post body 212 located on both axial sides of the position-limiting flange 22, the first post body 211 being adjacent to the outer surface of the cover plate 1. Specifically, the first pole body 211 is located on one side of the axial direction of the limit flange 22 close to the outer surface of the cover plate 1, the second pole body 212 is located on one side of the axial direction of the limit flange 22 away from the cover plate 1, the first pole body 211 extends towards the direction close to the outer surface of the cover plate 1, and the second pole body 212 extends towards the outer surface away from the cover plate 1.

The limiting groove 12 has a first side wall 121 and a second side wall 122 opposite to each other in the axial direction of the pole 2, and the first side wall 121 is far away from the second insulating member 32 relative to the second side wall 122. That is, the position restricting flange 22 is located between the first side wall 121 and the second side wall 122 to restrict the freedom of movement of the position restricting flange 22 in the axial direction by the position restricting groove 12.

Further, the second insulating member 32 includes: a first insulating portion 321, a second insulating portion 322, and a third insulating portion 323. Specifically, the first insulating portion 321 covers the outer surface of the cover plate 1, the second insulating portion 322 covers the outer peripheral side of the first pole body 211, and the third insulating portion 323 is located between the second side wall 122 and the limiting flange 22.

Specifically, the first insulating portion 321 is disposed around the mounting hole 11 on the outer surface of the cover plate 1, that is, the first insulating portion 321 is disposed around the pole 2, while the second insulating portion 322 may better space the first pole body 211 from the inner circumferential wall of the mounting hole 11, and the third insulating portion 323 may better space the second side wall 122 and the position-limiting flange 22. Therefore, the first insulating portion 321 can better enhance the insulating effect of the position of the cover plate 1 adjacent to the pole 2, the second insulating portion 322 can better realize the electrical isolation between the first pole body 211 and the inner peripheral wall of the mounting hole 11, and the third insulating portion 323 can better realize the electrical isolation between the second side wall 122 and the limiting flange 22, so as to ensure the insulating effect of the second insulating member 32.

In addition, the first insulating portion 321 and the third insulating portion 323 are both connected to the second insulating portion 322 at one end toward the axis of the pole 2, thereby ensuring the insulating effect of the second insulating member 32.

Optionally, the second insulating member 32 is injection-molded on the cover plate 1 by means of injection molding. It can be understood that, during the injection molding encapsulation process, the melted injection molding material can be well attached to the cover plate 1, so as to ensure the tightness of the combination of the second insulating member 32 and the cover plate 1. In addition, the second insulating member 32 is molded by injection molding and encapsulation, so that the second insulating member 32 can better adapt to different shapes of the cover plate 1, and deformation and extrusion in the installation process of the second insulating member 32 can be better reduced, so as to ensure the structural strength of the second insulating member 32.

In a specific example, the upper end of the inner peripheral wall of the mounting hole 11 is bent towards the inside of the mounting hole 11 to form the turned edge 13, the first insulating member 31 and the pole 2 can be assembled first, then the turned edge 13 is turned over after being placed on the supporting platform 14, and then the second insulating member 32 is injection-molded and encapsulated, so that the second insulating member 32 can be prevented from being deformed or damaged due to extrusion in the turning process of the turned edge 13, and the reliability of the second insulating member 32 can be improved.

In some embodiments of the present invention, the insulation assembly 3 further includes a sealing ring 33, the pole body 21 includes a first pole body 211 and a second pole body 212 located at two axial sides of the position-limiting flange 22, the first pole body 211 is adjacent to the outer surface of the cover plate 1, the second insulation member 32 is sleeved on the outer periphery of the first pole body 211, and the sealing ring 33 is sleeved on the outer periphery of the second pole body 212. From this, can be better sealed the clearance between second pole body 212 and the mounting hole 11 through sealing washer 33, can avoid steam or dust etc. to get into the battery module through mounting hole 11 in betterly, promptly, promote the sealing performance of battery module, do benefit to the interference killing feature who promotes battery module, reliability and security height.

In a specific example, as shown in fig. 6, the sealing ring 33 includes a first sealing portion 331 extending in the radial direction of the pole post 2 and a second sealing portion 332 extending in the axial direction of the pole post 2, and one end of the second sealing portion 332 facing the axis of the pole post 2 is connected with one end of the second sealing portion 332 facing the limit flange 22. Specifically, the first sealing portion 331 is located between the position-limiting flange 22 and the second side wall 122, the top wall of the first sealing portion 331 abuts against the bottom wall of the position-limiting flange 22, and the bottom wall of the first sealing portion 331 abuts against the second side wall 122, that is, the first sealing portion 331 can be in interference fit with the space between the position-limiting flange 22 and the second side wall 122, and the gap between the position-limiting flange 22 and the second side wall 122 is filled by the first sealing portion 331, so that the sealing effect of the sealing ring 33 is ensured. In addition, the first sealing portion 331 can better space the position-limiting flange 22 from the first side wall 121, which is beneficial to improving the insulation effect of the pole 2 and the cover plate 1.

Further, the second sealing portion 332 is located between the second pole body 212 and the side wall of the support table 14, so that the second sealing ring 33 can better separate the support table 14 from the second pole body 212, thereby achieving electrical isolation between the pole post 2 and the support table 14, and further improving the insulation effect between the pole post 2 and the cover plate 1.

A specific structure of the battery cover 100 according to one embodiment of the present invention is described below with reference to fig. 1 to 12. The following described embodiments are exemplary and are intended to be illustrative of the utility model and are not to be construed as limiting the utility model.

As shown in fig. 1 and 2, the battery cover 100 includes: the anti-explosion device comprises a cover plate 1, a pole column 2, an insulating assembly 3, lower plastic 4, an anti-explosion valve 5 and an anti-explosion valve patch 6.

As shown in fig. 10, two mounting holes 11 are formed in the cover plate 1 for mounting the two positive and negative electrode posts 2, respectively, and a first through hole 15 is formed between the two mounting holes 11. Referring to fig. 6, 11 and 12, the upper end of the inner peripheral wall of the mounting hole 11 is bent toward the inside of the mounting hole 11 to form a turned edge 13, the bottom wall of the turned edge 13 is the second side wall 122, the bottom of the mounting hole 11 forms a supporting platform 14, the supporting platform 14 is annular and protrudes out of the inner peripheral wall of the mounting hole 11, the top wall of the supporting platform 14 is the first side wall 121, and the first side wall 121 is provided with a positioning groove 1221.

Referring to fig. 3, the pole 2 includes: the first pole body 211, the second pole body 212 and the limit flange 22, the first pole body 211 and the second pole body 212 are respectively located at two axial sides of the limit flange 22.

Referring to fig. 3, the insulation assembly 3 includes: a first insulator 31, a second insulator 32, and a seal ring 33. As shown in fig. 7 to 9, the first insulating member 31 is wrapped around the outer circumferential side of the position-restricting flange 22 by injection molding, and a receiving groove 311 is formed inside the first insulating member 31. Referring to fig. 6, in the axial direction of the pole 2, two opposite sides of the receiving groove 311 avoid respectively fitting on two sides of the position-limiting flange 22; in the radial direction of the pole 2, the opposite side walls of the receiving groove 311 have a partial overlap with the position-defining flange 2222. The first insulator 31 includes a first insulator body 312 and a positioning projection 313, and the positioning projection 313 extending in a direction away from the first insulator body 312 is formed on the bottom wall of the first insulator body 312.

Further, as shown in fig. 5 and 6, the second insulating member 32 includes: the terminal comprises a first insulating part 321, a second insulating part 322 and a third insulating part 323, wherein the first insulating part 321 is attached to the outer surface of the turned edge 13, the second insulating part 322 is located between the side wall, facing the first pole body 211, of the turned edge 13 and the outer peripheral wall of the first pole body 211, and the third insulating part 323 is located between the second side wall 122 and the top wall of the limiting flange 22.

In addition, the sealing ring 33 is sleeved on the outer periphery of the second pole body 212, the sealing ring 33 comprises a first sealing portion 331 extending along the radial direction of the pole 2 and a second sealing portion 332 extending along the axial direction of the pole 2, and one end, facing the axial line of the pole 2, of the second sealing portion 332 is connected with one end, facing the limiting flange 22, of the second sealing portion 332.

As shown in fig. 1, 4 and 10, the lower plastic 4 is disposed on the back side of the cover plate 1, the lower plastic 4 forms a mounting groove 41 opposite to the first through hole 15, a second through hole 42 is formed on the bottom wall of the mounting groove 41, the explosion-proof valve 5 is disposed in the mounting groove 41, the explosion-proof valve 5 is opposite to the first through hole 15, and the explosion-proof valve patch 6 is laid on the outer surface of the cover plate 1 and covers the first through hole 15.

Specifically, in the assembly process of the battery cover 100, the first insulating member 31 is wrapped on the limiting flange 22 in an injection molding and encapsulation manner, the sealing ring 33 is sleeved on the second pole body 212, the pole 2 is then placed into the mounting hole 11, the first sealing portion 331 is located between the limiting flange 22 and the second side wall 122, the top wall of the first sealing portion 331 is abutted to the bottom wall of the limiting flange 22, the bottom wall of the first sealing portion 331 is abutted to the second side wall 122, the positioning protrusion 313 is placed in the positioning groove 1221, the curled edge 13 is then bent towards the mounting hole 11, and injection molding and encapsulation are performed on the gap between the curled edge 13 and the pole 2 and the upper surface of the curled edge 13, so that the second insulating member 32 is formed. Can realize utmost point post 2 and apron 1 electrical isolation betterly through first insulating part 31 and second insulating part 32, sealing washer 33 can promote battery module's interference killing feature betterly to promote battery module's security and stability.

A battery module according to an embodiment of the present invention will be described with reference to the accompanying drawings.

The battery module according to the embodiment of the present invention includes: at least one battery cell and a housing. The housing includes the battery cover 100, and the battery cell is disposed in the housing. The number of the battery monomers can be flexibly set according to actual requirements, for example, the number of the battery monomers can be increased to improve the electric storage capacity of the battery module, and specific limitation is not made here. From this, through placing battery monomer in the casing for the casing has good safeguard effect to battery monomer, does benefit to the security and the stability that promote battery module.

In addition, the battery cell can realize the transmission of electric energy through utmost point post 2 of battery cover 100, if transmit the electric energy that the battery cell stored to consumer through utmost point post 2, perhaps use external charging equipment to charge to the battery cell through utmost point post 2 to promote the convenience that battery module used.

According to the battery module of the embodiment of the utility model, the insulating component 3 comprises the first insulating part 31 and the second insulating part 32 which are formed relatively independently, so that the assembly flexibility of the insulating component 3 can be better improved, and the installation difficulty of the insulating component 3 can be favorably reduced. In addition, first insulating part 31 and second insulating part 32 all are the periphery side that the annular just all overlaps and locate utmost point post 2, do benefit to promote insulating subassembly 3 to utmost point post 2 and apron 1's insulating effect, and insulating properties is good.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

While embodiments of the utility model have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A battery cover, comprising:

the cover plate is provided with a mounting hole;

the pole is arranged in the mounting hole;

the insulating assembly, the insulating assembly is established the apron with between the utmost point post, at least some of insulating assembly is located the internal perisporium of mounting hole with between the utmost point post, in order to incite somebody to action utmost point post with the apron is isolated, the insulating assembly includes relative independent fashioned first insulating part and second insulating part, first insulating part with the second insulating part all is the annular and all overlaps and locates the periphery side of utmost point post.

2. The battery cover according to claim 1, wherein the first insulating member is injection-molded and wrapped on the pole by one-time injection molding and wrapping, and the second insulating member is injection-molded and wrapped on the cover plate by two-time injection molding and wrapping.

3. The battery cover according to claim 1, wherein the pole includes a pole body and a limit flange formed on an outer peripheral wall of the pole body, a limit groove is formed on an inner peripheral wall of the mounting hole, the limit flange is received in the limit groove, the first insulator is sleeved on an outer peripheral side of the limit flange, and the second insulator is sleeved on an outer peripheral side of the pole body.

4. The battery cover according to claim 3, wherein a receiving groove is formed on an inner peripheral wall of the first insulating member, and a part of the position-restricting flange is received in the receiving groove.

5. The battery cover according to claim 3, wherein the first insulating member includes a first insulating member body and a positioning protrusion, the first insulating member body is sleeved on an outer peripheral side of the limiting flange, the positioning protrusion is formed on an axial end surface of the first insulating member body, which is away from the second insulating member, the limiting groove has a first sidewall and a second sidewall opposite to each other in an axial direction of the terminal, the first sidewall is away from the second insulating member relative to the second sidewall, the first sidewall has a positioning groove formed thereon, and the positioning protrusion is received in the positioning groove.

6. The battery cover of claim 3, wherein said first insulator is injection molded around said retention flange by injection molding.

7. The battery cover of claim 3, wherein the post body includes a first post body and a second post body located on both axial sides of the limiting flange, the first post body being adjacent to the outer surface of the cover plate, the limiting groove having opposite first and second sidewalls in an axial direction of the post, wherein the first sidewall is distal from the second insulator relative to the second sidewall, the second insulator including:

the first insulating part is coated on the outer surface of the cover plate;

a second insulating part sleeved on the outer peripheral side of the first pole body;

a third insulating portion located between the second sidewall and the position-defining flange.

8. The battery cover of claim 7, wherein the second insulator is injection molded around the cover plate by injection molding.

9. The battery cover of claim 3, wherein the insulating assembly further comprises: the sealing ring, utmost point post body is including being located first utmost point post body and the second utmost point post body of limiting flange axial both sides, first utmost point post body is close to the surface of apron, the second insulator cover is located the periphery side of first utmost point post body, the sealing washer cover is established the periphery side of second utmost point post body.

10. A battery module, comprising:

at least one battery cell;

a housing comprising a battery cover according to any of claims 1-9, the battery cell being disposed within the housing.

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