CN213026380U

CN213026380U - Battery end cover and battery pack with same

Info

Publication number: CN213026380U
Application number: CN202022361004.6U
Authority: CN
Inventors: 孙伟; 陈伟; 贺京玮; 胡中良
Original assignee: Kunshan Ju Innovative Energy Technology Co Ltd
Current assignee: Kunshan Ju Innovative Energy Technology Co Ltd
Priority date: 2020-10-21
Filing date: 2020-10-21
Publication date: 2021-04-20
Anticipated expiration: 2030-10-21

Abstract

The utility model discloses a battery end cover and have its battery package, wherein, battery end cover includes: the cover comprises a cover body, a first mounting part, a second mounting part, a first nut and a second nut. The first installation part is arranged on the upper part of the cover body, the first installation part horizontally extends towards the direction far away from the cover body, a first installation hole is formed in the first installation part, the second installation part is arranged on the upper part of the cover body, the second installation part is coplanar with the first installation part, a second installation hole is formed in the second installation part, the first nut is arranged in the first installation hole, the second nut is arranged in the second installation hole, and the first nut and the second nut are vertically arranged. The utility model discloses battery end cover, the cooperation through the mounting hole that lid upper portion set up and nut realizes being connected between copper bar connecting piece and the battery end cover, with a plurality of electric core groups and battery end cover reciprocal anchorage under the condition that need not to increase other coupling assembling, reduction in production cost improves assembly efficiency.

Description

Battery end cover and battery pack with same

Technical Field

The utility model belongs to the technical field of the battery production, specifically a battery end cover and have its battery package.

Background

The power battery becomes the first choice of the power element of the electric automobile due to the advantages of high energy density, long cycle life, environmental protection and the like. Particularly, the soft package battery is an odorless product of the vast power battery manufacturers.

The soft package battery is a lithium battery with a shell made of a soft package material (usually an aluminum-plastic composite film), and has the advantages of small volume, light weight, high safety, flexible design and the like. However, since the soft-package battery has a soft body, is not easy to fix, and is very easy to have scratches, pits, creases, and the like, how to fix a plurality of soft-package batteries to each other and reduce the damage to the soft-package batteries becomes a difficult problem.

Among the prior art, set up a plurality of connection ribs around laminate polymer battery usually, the both ends of connection rib are connected respectively and are just can accomplish in order to realize the fixed of a plurality of laminate polymer batteries on two end covers around, but above-mentioned fixed mode needs a plurality of coupling assembling and mounting cooperation, and at the easy fish tail laminate polymer battery of in-process of connecting, lead to the dismouting between battery end cover and the laminate polymer battery module complicated, manufacturing cost is high and can't realize the lightweight after the laminate polymer battery assembles.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a battery end cover, battery end cover and copper bar connecting piece cooperation can realize the fixed between the cell group module, need not to increase other connecting pieces, have solved among the prior art technical problem that the dismouting is complicated between battery end cover and the cell group, cell group surface is easy the fish tail.

The utility model discloses still aim at providing a battery package that has above-mentioned battery end cover.

According to the utility model discloses battery end cover, include: a cover body; the first mounting part is arranged at the upper part of the cover body, extends horizontally towards the direction far away from the cover body and is provided with a first mounting hole; the second mounting part is arranged at the upper part of the cover body, the second mounting part is coplanar with the first mounting part, and a second mounting hole is formed in the second mounting part; a first nut installed in the first installation hole and vertically arranged; and the second nut is arranged in the second mounting hole and is vertically arranged.

According to the utility model discloses battery end cover, cooperation between mounting hole and the nut that sets up through lid upper portion can be connected the copper bar connecting piece on battery end cover, realize dismantling between copper bar connecting piece and the battery end cover and be connected, and realize connecting a plurality of electric cores in battery end cover with fixing each other, increase the stability of battery package between the battery end cover, need not to increase other coupling assembling, reduce the damage of connecting piece to electric core group, practice thrift manufacturing cost, realize the lightweight of battery package.

According to the battery end cover of one embodiment of the utility model, the upper surface of the first installation part is flush with the upper surface of the second installation part, the upper surface of the first nut is not lower than the upper surface of the first installation part, and the lower part of the first nut is positioned in the first installation part; the upper surface of second nut is not less than the upper surface of second installation department, the lower part of second nut is located in the second installation department.

According to the utility model discloses a battery end cover, the interior terminal surface of first installation department is equipped with the orientation the recessed first spacing groove of lid direction, the interior terminal surface of second installation department is equipped with the orientation the recessed second spacing groove of lid direction.

According to the utility model discloses a battery end cover, battery end cover still includes third installation department and two fourth installation departments, the both ends of third installation department are connected respectively first installation department with the second installation department, one of them the fourth installation department is connected first installation department, another the fourth installation department is connected the second installation department, the top surface of first installation department with the top surface of second installation department all is less than the top surface of third installation department with the top surface of fourth installation department.

Optionally, the battery end cover further includes a first protection portion and a second protection portion, the first protection portion and the second protection portion are respectively connected to the left side and the right side of the cover body, inner end faces of the first protection portion and the second protection portion are flush, the first installation portion, the second installation portion, the third installation portion and the fourth installation portion constitute a third protection portion, and an accommodation cavity is enclosed among the first protection portion, the second protection portion, the third protection portion and the cover body; the inner end face of the fourth installation part is higher than the inner end face of the first protection part, the inner end face of the first installation part and the inner end face of the second installation part are lower than the inner end face of the fourth installation part, and the inner end face of the third installation part is lower than the inner end face of the first installation part.

Optionally, the battery end cover further includes a fourth protection portion, the fourth protection portion is connected in the lower part of the lid, the fourth protection portion extends horizontally towards the direction of keeping away from the lid, the both sides of the fourth protection portion are connected respectively the medial surface of first protection portion with the second protection portion, first protection portion, the second protection portion the third protection portion the fourth protection portion with enclose between the lid and establish into and hold the chamber, it is uncovered keeping away from one side of lid to hold the chamber.

Optionally, the battery end cover further includes a support rib, the support rib is vertically erected in the accommodating cavity, two ends of the support rib are respectively connected to the third protection portion and the fourth protection portion, the inner end surface of the first protection portion does not exceed the inner end surface of the fourth protection portion, the inner end surface of the support rib does not exceed the inner end surface of the fourth protection portion, and the inner end surface of the first protection portion, the inner end surface of the second protection portion and the inner end surface of the support rib are flush.

Optionally, the first nut and the second nut are both insert nuts.

Optionally, the cover body is provided with a plurality of rows and a plurality of columns of heat dissipation holes and a third mounting hole, two side walls of the third mounting hole are provided with clamping strips, clamping columns are clamped on the clamping strips, two ends of each clamping column extend towards different directions far away from the cover body, inner end surfaces of the clamping columns do not exceed the inner end surfaces of the first mounting portion and the second mounting portion, and clamping jaws are formed at the other ends of the clamping columns; the heat dissipation holes are circular, oval, square, star-shaped or irregular polygons.

According to the utility model discloses battery package, include: the battery pack comprises at least one battery cell, and a copper bar is connected to a tab of the battery cell; the copper bar connecting pieces are connected with the copper bars on the battery cells; the two battery end covers are the battery end covers, the two battery end covers are respectively connected to two opposite ends of the electric core group, and two ends of the copper bar connecting piece are respectively connected with the first nut on one battery end cover and the second nut on the other battery end cover.

According to the utility model discloses battery pack, at the in-process of assembly, can connect the copper bar connecting piece on the copper bar of each electric core earlier, connect the second nut on first nut on one of them battery end cover and another battery end cover respectively with the both ends of copper bar connecting piece after accomplishing again, and then can fix the electric core group between two battery end covers, realize the reciprocal anchorage between a plurality of electric cores, and need not to increase other coupling assembling again, and the production cost is reduced, realize the lightweight of battery pack.

Additional aspects and advantages of the invention will be set forth in the description which follows, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic perspective view of a battery end cap according to an embodiment of the present invention.

Fig. 2 is a schematic perspective view of a battery end cap at another angle according to an embodiment of the present invention.

Fig. 3 is a schematic perspective view of a battery end cap with another angle according to an embodiment of the present invention.

Fig. 4 is a schematic structural view of an insert nut according to an embodiment of the present invention.

Reference numerals:

100. a battery end cap;

1. a cover body;

2. heat dissipation holes;

21. a first heat dissipation hole; 22. a second heat dissipation hole; 23. a third heat dissipation hole;

3. a first protection portion;

4. a second protection section;

5. a third protection part;

51. a first mounting portion; 511. a first mounting hole; 512. a first limit groove;

52. a second mounting portion; 521. a second mounting hole; 522. second limit groove

53. A third mounting portion;

54. a fourth mounting portion;

6. a fourth protection section;

7. a third mounting hole; 71. a claw; 72. clamping the column;

8. a support rib;

9. reinforcing ribs;

10. and (5) embedding a nut.

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 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 exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "thickness", "upper", "lower", "front", "rear", "left", "right", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

The battery end cap 100 of the embodiments of the present invention is described below with reference to the accompanying drawings.

According to the utility model discloses a battery end cover 100, as shown in fig. 1, include: the cover 1, the first mounting portion 51, the second mounting portion 52, the first nut, and the second nut (not shown in the figure).

The first mounting portion 51 is disposed on the upper portion of the cover 1, and the first mounting portion 51 extends horizontally in a direction away from the cover 1, and the first mounting portion 51 is provided with a first mounting hole 511.

The second mounting portion 52 is provided on the upper portion of the lid body 1, the second mounting portion 52 is coplanar with the first mounting portion 51, and the second mounting portion 52 is provided with a second mounting hole 521. That is, the second mounting portion 52 extends horizontally toward a direction away from the lid body 1.

The first nut is installed in the first installation hole 511 and is vertically arranged. That is, the first nut is mounted in the first mounting hole 511 with its axis perpendicular to the upper surface of the first mounting portion 51.

The second nut is installed in the second installation hole 521 and is vertically arranged. That is, the second nut is mounted in the second mounting hole 521 with its axis perpendicular to the upper surface of the second mounting portion 52.

According to the above structure, the utility model discloses battery end cover 100 sets up first installation department 51 through the upper portion at lid 1, and is equipped with first mounting hole 511 on the first installation department 51, and first mounting hole 511 and first nut cooperation can realize that the one end of one of them copper bar connecting piece (not shown in the figure) is connected on battery end cover 100, realizes dismantling between copper bar connecting piece and the battery end cover 100 and is connected.

Through setting up second installation department 52 on the upper portion of lid 1, and be equipped with second mounting hole 521 on the second installation department 52, second mounting hole 521 and the cooperation of second nut can realize that the other end of one of them copper bar connecting piece is connected on another battery end cover 100. And then realize fixing the electric core group in two battery end covers 100, connect simply and install and remove the convenience, need not to increase other coupling assembling again, reduce coupling assembling to the damage of electric core group to improved assembly efficiency, reduction in production cost, and realized the lightweight of battery package.

It can be understood that, the battery end cover 100 of this application, through first mounting hole 511 and the second mounting hole 521 of seting up on lid 1 to can realize fixed electric core group with the help of first nut and second nut, and guarantee the fixed connection between battery end cover 100 and the electric core group, the connected mode is simple and install and remove the convenience, effectively improves production efficiency, reduction in production cost.

It should be noted that, the two copper bar connecting pieces are provided, one copper bar connecting piece is connected with the positive electrode of the electric core set and is connected with the first nut on one of the battery end covers and the second nut on the other battery end cover, and the other copper bar connecting piece is connected with the negative electrode of the electric core set and is connected with the second nut on one of the battery end covers and the first nut on the other battery end cover. The process of connecting a plurality of electric core groups is ensured, the electric core groups are fixed in the battery end cover 100, the number of connecting components is reduced, and the production cost is reduced.

Optionally, the insert nut 10 is selected for both the first nut and the second nut (the specific structure of the insert nut 10 can be seen in fig. 4), that is, the same structural member is selected for both the first nut and the second nut, so that the production cost is saved, and the production efficiency is improved. Accordingly, the first and second mounting holes 511 and 521 have the same diameter and the same opening depth. Through the stable cooperation of mold insert nut 10 with first mounting hole 511 and second mounting hole 521 respectively, realize burying first nut and second nut in lid 1, let form effectual internal thread hole on the lid 1, be convenient for pass through connecting piece threaded connection such as bolt with the copper bar connecting piece.

Optionally, the first nut and the second nut are made of carbon steel, and trivalent color zinc is plated on the carbon steel, so that the first nut and the second nut have high structural strength.

Alternatively, the first and second mounting portions 51 and 52 are arranged axisymmetrically with respect to the center line of the cover 1, and the first and second mounting holes 511 and 521 are arranged axisymmetrically with respect to the center line of the cover 1. Ensuring that the second mounting hole 521 is opposite to the positive pole of the electric core group when the first mounting hole 511 is opposite to the negative pole of the electric core group; when the first mounting hole 511 is over against the positive electrode of the electric core group, the second mounting hole 521 is over against the negative electrode of the electrode group, so that the assembly difficulty is reduced.

Optionally, the cover body 1 is made of thermoplastic plastics made of Polycarbonate (Polycarbonate) and polypropylene fine (ABS) alloy, so that the cover body 1 has high impact strength, plays a role in protecting the electric core assembly, further reduces the weight of the cover body 1, and realizes light weight of the battery end cover 100.

Optionally, positive and negative marks are arranged on the outer surface of the cover body 1. Can help the staff to distinguish the installation direction of electric core group fast through positive negative sign, realize rapid Assembly, improve assembly efficiency to play the foolproof function, guarantee that the installation direction of electric core group on battery end cover 100 is errorless.

In some embodiments of the present invention, the upper surface of the first mounting portion 51 is flush with the upper surface of the second mounting portion 52, the upper surface of the first nut is not lower than the upper surface of the first mounting portion 51, and the lower portion of the first nut is located within the first mounting portion 51; the upper surface of the second nut is not lower than the upper surface of the second mounting portion 52, and the lower portion of the second nut is located within the second mounting portion 52. That is, only one surface of the first nut and the first nut is exposed to the outside for connecting the copper bar connecting member to realize the connection of the copper bar connecting member to the battery end cap 100.

Optionally, the upper surface of the first nut is 0-0.2 mm higher than the upper surface of the first mounting portion 51, and the upper surface of the second nut is 0-0.2 mm higher than the upper surface of the second mounting portion 52. The lower surface of the copper bar connecting piece can be completely attached to the upper surfaces of the first installation part 51 and the second installation part 52, the contact area between the copper bar connecting piece and the battery end cover 100 is increased, and the stability of the copper bar connecting piece relative to the battery end cover 100 is improved.

Corresponding adjustment can be made according to the thickness of copper bar connecting piece to the distance between the upper surface of above-mentioned upper surface of first nut and the upper surface of first installation department 51 and the distance between the upper surface of second nut and the upper surface of second installation department 52, does not do specific restriction here, guarantees that the lower surface of copper bar connecting piece laminates completely on first installation department 51 and second installation department 52 can.

In some embodiments of the present invention, as shown in fig. 1, the inner end surface of the first mounting portion 51 is provided with a first limiting groove 512 recessed toward the cover 1, and the inner end surface of the second mounting portion 52 is provided with a second limiting groove 522 recessed toward the cover 1. Through the setting of first spacing groove 512 and second spacing groove 522, can be with protruding convex closure gomphosis respectively in first spacing groove 512 and second spacing groove 522 on the electric core group, reduce the distance between electric core group and battery end cover 100, make the electric core group structure after connecting compacter, reduce the area occupied of battery package in the automobile body promptly to increased locate function, convenient assembly.

In some embodiments of the present invention, as shown in fig. 1, the battery end cover 100 further includes a third installation portion 53 and two fourth installation portions 54, the first installation portion 51 and the second installation portion 52 are respectively connected to two ends of the third installation portion 53, one of the fourth installation portions 54 is connected to the first installation portion 51, the other fourth installation portion 54 is connected to the second installation portion 52, and the top surface of the first installation portion 51 and the top surface of the second installation portion 52 are lower than the top surface of the third installation portion 53 and the top surface of the fourth installation portion 54. The third mounting part 53 and one of the fourth mounting parts 54 are matched with each other to limit the copper bar connecting piece connected to the top surface of the first mounting part 51, so that the position of the copper bar connecting piece is stable and the copper bar connecting piece cannot shake left and right; the position of copper bar connecting piece that third installation department 53 and another fourth installation department 54 cooperation can spacing connection on second installation department 52 top surface ensures that copper bar connecting piece position is stable, can not take place to rock about, and then increases the stability of copper bar connecting piece on battery end cover 100.

In the description of the present invention, features defined as "first", "second", "third" and "fourth" may explicitly or implicitly include one or more of the features for distinguishing between descriptive features, non-sequential, non-trivial and non-trivial.

In some embodiments of the present invention, as shown in fig. 1, the battery end cover 100 further includes a first protection portion 3 and a second protection portion 4, the first protection portion 3 and the second protection portion 4 are respectively connected to the left and right sides of the cover 1, the inner end surfaces of the first protection portion 3 and the second protection portion 4 are flush, the first installation portion 51, the second installation portion 52, the third installation portion 53 and the fourth installation portion 54 form a third protection portion 5, and a synthetic accommodating cavity is enclosed between the first protection portion 3, the second protection portion 4, the third protection portion 5 and the cover 1. The accommodating cavity is used for accommodating the battery cell, the battery cell is arranged in the accommodating cavity, the accommodating cavity can play a role in protecting the battery cell on one hand, when the battery pack is impacted, the accommodating cavity collapses and absorbs energy, and partial impact force is absorbed by using the strength and rigidity of the accommodating cavity, so that the damage of the impact force to the battery cell is reduced; on the other hand, hold the chamber and provide installation space for electric core to the biggest shift position of electric core has been restricted, and other positions that the electric core group dislocation moved to car aircraft bonnet when preventing that battery end cover 100 from receiving the striking improve the electric core group and hold the stability of intracavity.

Alternatively, the first protection portion 3 and the second protection portion 4 are arranged axisymmetrically with respect to the center line of the lid body 1, and the first protection portion 3 and the second protection portion 4 are bent obliquely outward toward the direction of the accommodation chamber. The first protection part 3 and the second protection part 4 which are formed in a bending mode can reduce the whole area of the battery end cover 100 and reduce the occupied space of the battery end cover 100; on the other hand, the outer surfaces of the first protection part 3 and the second protection part 4 are arc-shaped, so that the battery end cover 100 has high scratch resistance, and the service life of the battery end cover 100 is further prolonged.

Alternatively, the inner end surface of the fourth mounting portion 54 is higher than the inner end surface of the first protecting portion 3. Place the electric core group and hold the intracavity, the side butt of electric core group is on the interior terminal surface of first protection part 3, but the upper surface butt of electric core group fourth installation department 54's lower surface guarantees the perfect laminating of electric core group and battery end cover 100, receives the exogenic action when battery end cover 100, and the electric core group of placing can not take place to rock in its battery end cover 100, improves the stability of battery package.

Note that the inner end surface of the first protective portion 3 is a straight section. Place the electric core group and hold the intracavity, but the one end butt of electric core group plays the effect of fixed electric core group on straight section, guarantees the stability of electric core group in battery end cover 100.

Alternatively, the inner end surface of the fourth mounting portion 54 is higher than the inner end surface of the second guard portion 4. Place the electric core group in holding the intracavity, the side butt of electric core group is on the interior terminal surface of second protection part 4, but the upper surface butt of electric core group further improves the stability of battery package at the lower surface of fourth installation department 54.

Note that the inner end surface of the second protective portion 4 is also a straight section. The beneficial effect is the same as that of the inner end surface of the first protection portion 3 being a straight section, and is not described herein.

Alternatively, the inner end surfaces of the first mounting portion 51 and the second mounting portion 52 are lower than the inner end surface of the fourth mounting portion 54, and the inner end surface of the third mounting portion 53 is lower than the inner end surface of the first mounting portion 51. The side surfaces of the electric core group can not abut against the inner end surfaces of the first installation part 51, the second installation part 52 and the third installation part 53, the contact area between the electric core group and the battery end cover 100 is reduced, and the heat dissipation efficiency of the electric core group is increased.

In some embodiments of the present invention, as shown in fig. 1, the battery end cover 100 further includes a fourth protection portion 6, the fourth protection portion 6 is connected to the lower portion of the cover 1, the fourth protection portion 6 extends horizontally towards the direction away from the cover 1, the inner sides of the first protection portion 3 and the second protection portion 4 are respectively connected to two sides of the fourth protection portion 6, the first protection portion 3, the second protection portion 4, the third protection portion 5, the fourth protection portion 6 and the cover 1 are enclosed to form a containing cavity, and the containing cavity is open on the side away from the cover 1. Conveniently lay the electric core group to for arranging of electric core group provides sufficient space, when the battery package received the striking, the intensity and the rigidity of first protection part 3, second protection part 4, third protection part 5,

fourth protection part

6 and 1 usable self of lid absorb some impact, and then reduce the destruction of impact to electric core group, improve the security of electric core group in holding the intracavity.

In some embodiments of the present invention, as shown in fig. 2, the battery end cover 100 further includes a supporting rib 8, the supporting rib 8 is vertically erected in the accommodating cavity, and the third protecting portion 5 and the fourth protecting portion 6 are respectively connected to two ends of the supporting rib 8. The support ribs 8 are used to reinforce the structural strength of the cover 1, and ensure that the battery end cap 100 is not deformed by external force.

Alternatively, as shown in fig. 2, the support rib 8 includes a plurality of support ribs 8, the plurality of support ribs 8 are arranged in parallel, and both ends of each support rib 8 are respectively connected to the third protective portion 5 and the fourth protective portion 6. The structural strength of the lid body 1 is further enhanced.

Alternatively, the inner end surface of the first guard part 3 does not exceed the inner end surface of the fourth guard part 6, the inner end surface of the support rib 8 does not exceed the inner end surface of the fourth guard part 6, and the inner end surface of the first guard part 3, the inner end surface of the second guard part 4, and the inner end surface of the support rib 8 are flush. At this moment, support rib 8 can play the effect of injecing electric core group position, makes electric core group can not directly laminate on the internal surface of lid 1, reduces the area of contact between battery end cover 100 and the electric core group, improves the heat dispersion of battery package, and then prolongs the life of electric core group.

In some embodiments of the present invention, as shown in fig. 2, the battery end cap 100 further includes a reinforcing rib 9, the reinforcing rib 9 is disposed to intersect with the supporting rib 8, and both ends of the reinforcing rib 9 are respectively connected to the first protection portion 3 and the second protection portion 4. The reinforcing ribs 9 further enhance the structural strength of the battery end cover 100, and ensure that the battery end cover 100 is not extruded and deformed after being extruded by external force.

Optionally, the reinforcing rib 9 includes a plurality of reinforcing ribs 9, the plurality of reinforcing ribs 9 are arranged in parallel, and both ends of each reinforcing rib 9 are respectively connected to the first protection portion 3 and the second protection portion 4. The structural strength of the lid body 1 is further enhanced.

In some embodiments of the present invention, as shown in fig. 3, a plurality of rows and columns of heat dissipation holes 2 are formed on the cover body 1. Through setting up a plurality of louvres 2 on lid 1, a plurality of louvres 2 can in time spread away the produced heat of electric core group in the course of the work, avoid the heat to gather and lead to electric core group emergence thermal runaway, improve the security performance of electric core group.

In the description of the present invention, "a plurality" means two or more unless otherwise specified.

Optionally, the interval sets up between two adjacent louvres 2, still can guarantee battery end cover 100's intensity when guaranteeing that the heat of electric core group can effectively radiate, and battery end cover 100 connects and can play the guard action to electric core group on electric core group, effectively prolongs the life of electric core group, guarantees the safe in utilization of battery package.

Optionally, the arrangement density of the plurality of heat dissipation holes 2 in the middle of the cover 1 is greater than the arrangement density of the plurality of heat dissipation holes 2 on the upper and lower sides of the cover 1, and the total flow area of the heat dissipation holes 2 arranged in the middle of the cover 1 is greater than the total flow area of the heat dissipation holes 2 arranged on the upper and lower sides of the cover 1. A plurality of louvres 2 at middle part can distribute away the heat of concentrating on 1 middle part of lid fast, realize the quick heat dissipation of battery package to make the electric core group can quick charge-discharge, increase the charge-discharge number of times of electric core group, prolong the life of electric core group.

Optionally, as shown in fig. 3, the heat dissipation holes 2 in the middle region of the cover 1 form a group and are marked as first heat dissipation holes 21, the heat dissipation holes 2 in the two side regions of the cover 1 are two groups and are respectively marked as second heat dissipation holes 22 and third heat dissipation holes 23, the distance between two adjacent first heat dissipation holes 21 is smaller than the distance between the first heat dissipation hole 21 and the nearest second heat dissipation hole 22, and the distance between adjacent first heat dissipation holes 21 is smaller than the distance between the first heat dissipation hole 21 and the nearest third heat dissipation hole 23. The structural strength of the cover body 1 can be increased while ensuring the effective heat dissipation in the middle of the electric core group, so that the battery end cover 100 can effectively protect the electric core group and improve the safety of the electric core group.

Optionally, the heat dissipation hole 2 is circular, oval, square, star-shaped or irregular polygonal. The heat dissipation holes 2 with different cross-sectional shapes form different shapes and different sizes of flow areas, and technicians can select to arrange the heat dissipation holes 2 with different cross-sectional shapes on the cover body 1 according to the shape and the size of the electric core group and the working environment of the battery pack.

Advantageously, the cross-sectional shape of the heat dissipation hole 2 is a square hole, and the square here is a rectangle. The interval between two adjacent louvres 2 of increase that cross sectional shape is the louvre 2 of quad slit can maximize is under the prerequisite of guaranteeing 1 structural strength of lid for the heat that the electric core group produced distributes away in time, ensures that the heat can not gather in the inside of lid 1.

Optionally, the reinforcing ribs 9 are arranged in a staggered manner with the heat dissipation holes 2, so that the reinforcing ribs 9 are ensured not to interfere with the heat dissipation of the electric core pack.

In some embodiments of the present invention, as shown in fig. 3, a third mounting hole 7 is further provided on the cover body 1, two side walls of the third mounting hole 7 are provided with a clamping strip, the clamping strip is connected with a clamping column 72 (the concrete structure of the clamping column 72 can refer to fig. 2), two ends of the clamping column 72 extend towards different directions away from the cover body 1, an inner end surface of the clamping column 72 does not exceed an inner end surface of the first mounting portion 51 and an inner end surface of the second mounting portion 52, and the other end of the clamping column 72 forms a clamping jaw 71. Can connect battery end cover 100 on the environmental part of vehicle through jack catch 71, guarantee that the relative position relation of battery end cover 100 in the vehicle is stable, at the in-process that the car was gone or is rocked, battery end cover 100 can not rock for the vehicle, that is the electric core group can not rock for the vehicle, and then improves the stability of electric core group.

Alternatively, as shown in fig. 3, the third mounting holes 7 include two, and the two third mounting holes 7 are arranged axisymmetrically with respect to the center line of the cover body 1. Each third mounting hole 7 is provided with a claw 71 which is distributed outwards towards the direction far away from the containing cavity, and the battery end cover 100 is stably connected to the environmental component of the vehicle through the two claws 71, so that the stability of the battery end cover 100 is further improved.

The following describes a battery pack according to an embodiment of the present invention.

According to the utility model discloses battery package, include: the battery pack, the copper bar connecting piece and the two battery end covers 100.

The battery core group comprises at least one battery cell, and a copper bar is connected to a tab of the battery cell.

The copper bar connecting piece is connected with the copper bar on each electric core.

The two battery end covers 100 are the battery end covers 100, the two battery end covers 100 are respectively connected to two opposite ends of the electric core group, and two ends of the copper bar connecting piece are respectively connected to a first nut on one of the battery end covers 100 and a second nut on the other battery end cover 100.

With the structure, the battery pack of the embodiment of the utility model has the advantages that in the process of assembling the battery pack, the copper bar connecting piece for connecting the positive electrode is firstly connected to the copper bar of the positive electrode lug of each battery cell, the copper bar connecting piece for connecting the negative electrode is connected to the copper bar of the negative electrode lug of each battery cell, after the connection is finished, the two ends of the copper bar connecting piece for connecting the positive electrode are respectively connected with the first nut on one battery end cover 100 and the second nut on the other battery end cover 100, the two ends of the copper bar connecting piece for connecting the negative electrode are respectively connected with the second nut on one battery end cover 100 and the first nut on the other battery end cover 100, thereby fixing the electric core groups between the two battery end covers 100, realizing the mutual fixation among a plurality of electric core groups, and need not to increase other coupling assembling again, reduction in production cost just realizes the lightweight of battery package.

Optionally, one battery cell is a single soft package battery.

Alternatively, the electric core group can be a plurality of soft package batteries connected in series or in parallel.

The specific structure of the battery end cap 100 and the battery pack according to the embodiment of the present invention will be described with reference to the drawings. The embodiments of the present invention may be all embodiments combined by the foregoing technical solutions, and are not limited to the following specific embodiments.

Example 1

A battery end cap 100, as shown in fig. 1, comprising: the cover 1, the first mounting portion 51, the second mounting portion 52, the first nut, and the second nut (not shown in the figure).

The second mounting portion 52 is provided on the upper portion of the lid body 1, the second mounting portion 52 is coplanar with the first mounting portion 51, and the second mounting portion 52 is provided with a second mounting hole 521.

The first nut is installed in the first installation hole 511 and is vertically arranged.

The second nut is installed in the second installation hole 521 and is vertically arranged.

Example 2

A battery end cap 100, different from embodiment 1, in embodiment 1, the upper surface of a first mounting part 51 is flush with the upper surface of a second mounting part 52, the upper surface of a first nut is higher than the upper surface of the first mounting part 51, and the lower part of the first nut is positioned in the first mounting part 51; the upper surface of the second nut is higher than the upper surface of the second mounting portion 52, and the lower portion of the second nut is located within the second mounting portion 52.

Example 3

Different from embodiment 1, in embodiment 1, as shown in fig. 1, the battery end cover 100 further includes a third mounting portion 53 and two fourth mounting portions 54, two ends of the third mounting portion 53 are respectively connected to the first mounting portion 51 and the second mounting portion 52, one of the fourth mounting portions 54 is connected to the first mounting portion 51, the other fourth mounting portion 54 is connected to the second mounting portion 52, and a top surface of the first mounting portion 51 and a top surface of the second mounting portion 52 are lower than a top surface of the third mounting portion 53 and a top surface of the fourth mounting portion 54.

As shown in fig. 1, the battery end cap 100 further includes a first protection portion 3 and a second protection portion 4, the first protection portion 3 and the second protection portion 4 are respectively connected to the left and right sides of the cap body 1, inner end faces of the first protection portion 3 and the second protection portion 4 are flush, the first mounting portion 51, the second mounting portion 52, the third mounting portion 53 and the fourth mounting portion 54 form a third protection portion 5, and an accommodation cavity is enclosed between the first protection portion 3, the second protection portion 4, the third protection portion 5 and the cap body 1.

As shown in fig. 1, the battery end cap 100 further includes a fourth protection portion 6, the fourth protection portion 6 is connected to a lower portion of the cap body 1, the fourth protection portion 6 extends horizontally in a direction away from the cap body 1, two sides of the fourth protection portion 6 are respectively connected to inner side surfaces of the first protection portion 3 and the second protection portion 4, and an accommodation cavity is defined between the first protection portion 3, the second protection portion 4, the third protection portion 5, the fourth protection portion 6 and the cap body 1, and is open on a side away from the cap body 1.

Example 4

Different from embodiment 3, in embodiment 3, as shown in fig. 2, the battery end cover 100 further includes a support rib 8, the support rib 8 is vertically supported in the accommodating cavity, and two ends of the support rib 8 are respectively connected to the third protection portion 5 and the fourth protection portion 6.

The inner end surface of the first protector 3 does not exceed the inner end surface of the fourth protector 6, the inner end surface of the support rib 8 does not exceed the inner end surface of the fourth protector 6, and the inner end surfaces of the first protector 3, the second protector 4, and the support rib 8 are flush in surface.

Example 5

A battery end cap 100 is different from embodiment 1 in that, on the basis of embodiment 1, as shown in fig. 3, a cover body 1 is provided with a plurality of rows and a plurality of columns of heat dissipation holes 2 and a third mounting hole 7, two side walls of the third mounting hole 7 are provided with clamping strips, clamping posts 72 are clamped on the clamping strips, two ends of the clamping posts 72 respectively extend in different directions away from the cover body 1, an inner end surface of the clamping posts 72 does not exceed an inner end surface of a first mounting portion 51 and an inner end surface of a second mounting portion 52, and the other ends of the clamping posts 72 form clamping claws.

Example 6

A battery pack, comprising: the battery pack, the copper bar connecting piece and the two battery end covers 100.

The two battery end covers 100 are the battery end covers 100 of embodiment 1, the two battery end covers 100 are respectively connected to two opposite ends of the electric core pack, and two ends of the copper bar connecting piece are respectively connected to the first nut on one of the battery end covers 100 and the second nut on the other battery end cover 100.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; either mechanically or electrically. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Two support ribs 8 are shown in fig. 2 for illustrative purposes, but it is obvious to those skilled in the art after reading the above technical solutions that the solution can be applied to three or more support ribs 8, which also falls within the protection scope of the present invention.

In the description herein, references to the description of the terms "embodiment," "example," 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 invention. In this specification, the schematic representations of the terms used above do not necessarily 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.

While embodiments of the present invention 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 invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery end cap, comprising:

a cover body;

the first mounting part is arranged at the upper part of the cover body, extends horizontally towards the direction far away from the cover body and is provided with a first mounting hole;

the second mounting part is arranged at the upper part of the cover body, the second mounting part is coplanar with the first mounting part, and a second mounting hole is formed in the second mounting part;

a first nut installed in the first installation hole and vertically arranged;

and the second nut is arranged in the second mounting hole and is vertically arranged.

2. The battery end cap of claim 1, wherein an upper surface of the first mounting portion is flush with an upper surface of the second mounting portion, an upper surface of the first nut is no lower than the upper surface of the first mounting portion, and a lower portion of the first nut is located within the first mounting portion; the upper surface of second nut is not less than the upper surface of second installation department, the lower part of second nut is located in the second installation department.

3. The battery end cap of claim 1, wherein the inner end surface of the first mounting portion is provided with a first limiting groove that is recessed toward the cover, and the inner end surface of the second mounting portion is provided with a second limiting groove that is recessed toward the cover.

4. The battery end cap of claim 1, further comprising a third mounting portion and two fourth mounting portions, wherein two ends of the third mounting portion are respectively connected to the first mounting portion and the second mounting portion, one of the fourth mounting portions is connected to the first mounting portion, the other of the fourth mounting portions is connected to the second mounting portion, and the top surface of the first mounting portion and the top surface of the second mounting portion are both lower than the top surfaces of the third mounting portion and the fourth mounting portion.

5. The battery end cover according to claim 4, further comprising a first protection portion and a second protection portion, wherein the first protection portion and the second protection portion are respectively connected to the left side and the right side of the cover body, inner end faces of the first protection portion and the second protection portion are flush, a third protection portion is formed by the first installation portion, the second installation portion, the third installation portion and the fourth installation portion, and an accommodation cavity is enclosed among the first protection portion, the second protection portion, the third protection portion and the cover body;

the inner end face of the fourth installation part is higher than the inner end face of the first protection part, the inner end face of the first installation part and the inner end face of the second installation part are lower than the inner end face of the fourth installation part, and the inner end face of the third installation part is lower than the inner end face of the first installation part.

6. The battery end cap of claim 5, further comprising a fourth protection portion, wherein the fourth protection portion is connected to a lower portion of the cover body, the fourth protection portion extends horizontally in a direction away from the cover body, two sides of the fourth protection portion are respectively connected to inner side surfaces of the first protection portion and the second protection portion, and a receiving cavity is defined between the first protection portion, the second protection portion, the third protection portion, the fourth protection portion and the cover body, and is open on a side away from the cover body.

7. The battery end cover according to claim 6, further comprising a support rib vertically supported in the accommodating cavity, wherein two ends of the support rib are respectively connected to the third protection portion and the fourth protection portion, the inner end surface of the first protection portion does not exceed the inner end surface of the fourth protection portion, the inner end surface of the support rib does not exceed the inner end surface of the fourth protection portion, and the inner end surfaces of the first protection portion, the second protection portion and the support rib are flush with each other.

8. The battery end cap of any of claims 1-7, wherein the first nut and the second nut are insert nuts.

9. The battery end cover according to any one of claims 1-7, wherein the cover body is provided with a plurality of rows and columns of heat dissipation holes and a third mounting hole, two side walls of the third mounting hole are provided with clamping strips, clamping columns are clamped on the clamping strips, two ends of each clamping column extend towards different directions away from the cover body, inner end surfaces of the clamping columns do not exceed the inner end surfaces of the first mounting portion and the second mounting portion, and clamping jaws are formed at the other ends of the clamping columns;

the heat dissipation holes are circular, oval, square, star-shaped or irregular polygons.

10. A battery pack, comprising:

the battery pack comprises at least one battery cell, and a copper bar is connected to a tab of the battery cell;

the copper bar connecting pieces are connected with the copper bars on the battery cells;

the two battery end covers are according to any one of claims 1-9 and are respectively connected to two opposite ends of the electric core group, and two ends of the copper bar connecting piece are respectively connected to the first nut on one battery end cover and the second nut on the other battery end cover.