CN209843815U

CN209843815U - Battery module shell, battery module, battery package and car

Info

Publication number: CN209843815U
Application number: CN201921004633.4U
Authority: CN
Inventors: 王锋锋; 王东营; 曾仁安; 周春平; 张光宇; 李勇; 于光
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2019-06-28
Filing date: 2019-06-28
Publication date: 2019-12-24
Anticipated expiration: 2029-06-28

Abstract

The utility model relates to a new energy automobile technical field provides a battery module shell, battery module, battery package and car. Battery module shell include shell body, two relative inner panel (20) that set up and set up the shell body with elastic component (30) between inner panel (20), wherein, the shell body encloses into rigid structure, two be used for setting up electric core between inner panel (20), so that inner panel (20) with elastic component (30) can be extruded electric core with between the shell body. The utility model provides a battery module shell can make the bulging force that electric core produced obtain releasing, avoids causing electric core to be lengthened because the unable release of bulging force of electric core, therefore has guaranteed the performance of electric core.

Description

Battery module shell, battery module, battery package and car

Technical Field

The utility model relates to a new energy automobile technical field, in particular to battery module shell, battery module, battery package and car.

Background

Along with the development of the electric automobile industry, the safety and performance problems of the power battery for the automobile are more and more concerned by people, the battery can inevitably generate the expansion agent shrinkage phenomenon in the charging and discharging processes of the lithium battery, the main reason is that when the battery is charged, lithium ions are separated from the positive electrode and are embedded into the negative electrode, and the interval between the negative electrode layers is increased due to hardness, so that the expansion is generated, generally speaking, the thicker the battery is, the larger the expansion amount of the battery is; meanwhile, the battery core process can not meet the requirements, the expansion of the battery core can be caused, the high-activity lithium carbohydrate formed by charging is very sensitive to water, so that a violent chemical reaction can be generated, and the generated gas can cause the internal pressure of the battery core to be increased, so that the expansion of the battery can be caused. Along with the inflation of electric core, the atress between the electric core can be bigger and bigger, and the module curb plate also can be elongated slowly, and the pressure that the electric core received can be bigger and bigger, and under this kind of condition, the cyclic attenuation of electric core can obviously accelerate after certain cycle.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention is directed to a battery module housing to prevent the battery performance from being affected by the expansion of the battery core in the battery module housing.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

the utility model provides a battery module shell, battery module shell includes shell body, two relative inner panels that set up and sets up the shell body with elastic component between the inner panel, wherein, the shell body encloses into rigid structure, two be used for setting up electric core between the inner panel, so that the inner panel with elastic component can be extruded electric core with between the shell body.

Furthermore, the shell body comprises an outer plate and a side wall part, the elastic part is arranged between the outer plate and the inner plate, and two ends of the side wall part are detachably connected with the outer plate.

Further, the elastic member includes a first end and a second end in a direction from the outer plate to the inner plate, a first groove is formed on the plate surface of the outer plate, a second groove is formed on the plate surface of the inner plate, the first end of the elastic member is accommodated in the first groove, and the second end of the elastic member is accommodated in the second groove.

Further, the battery module shell comprises a bolt, mounting holes penetrating through two end faces of the outer plate are formed in the outer plate, the side wall part comprises an upper supporting plate and a lower supporting plate, the upper supporting plate comprises a top baffle and an upper side baffle which are perpendicular to each other, and the top baffle is connected with the top end of the upper side baffle; the bottom supporting plate comprises a bottom baffle and a lower side baffle which are perpendicular to each other, the bottom baffle is connected with the bottom end of the lower side baffle, the upper side baffle and the lower side baffle are attached to the outer plate and the side end of the inner plate, the top baffle and the bottom baffle are provided with through holes corresponding to the mounting holes, the bolts penetrate through the through holes of the top baffle, the mounting holes and the through holes of the bottom baffle are connected with the upper supporting plate, the outer plate and the bottom supporting plate.

Compared with the prior art, battery module shell have following advantage:

battery module shell, the elastic component makes and forms elastic connection between inner panel and the shell body, when electric core installs between two inner panels, elastic component, inner panel are extruded between shell body and electric core, when electric core takes place the inflation, the bulging force that electric core produced can extrude the inner panel to make the elastic component further compressed, thereby the bulging force that makes electric core produce obtains releasing, avoid causing electric core to be lengthened because the unable release of bulging force of electric core, therefore guaranteed the performance of electric core.

Another object of the present invention is to provide a battery module, which prevents the battery core of the battery module from expanding and affecting the performance of the battery.

the utility model provides a battery module, battery module includes electric core and as above battery module shell, electric core sets up two between the inner panel.

Furthermore, the battery module comprises a plurality of battery cells, the battery cells are arranged in the battery module shell along the direction from one inner plate to the other inner plate, and two adjacent battery cells are connected in an adhesive manner.

Furthermore, two adjacent battery cores are bonded through aerogel.

Furthermore, insulating paper is arranged between the inner plate and the battery core.

The utility model discloses still provide a battery package in another aspect, the battery package includes casing under the battery package and as above the battery module, the battery module shell is connected casing under the battery package.

The last aspect of the present invention is to provide a car, wherein the car comprises the battery pack as described above.

Compared with the prior art, the battery module, the battery pack and the automobile have the same advantages as the automobile and the battery module shell, and the description is omitted.

Other features and advantages of the present invention will be described in detail in the detailed description which follows.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

fig. 1 is a schematic view of a battery module according to an embodiment of the present invention when a battery cell is disposed in a housing;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a front view of FIG. 1;

fig. 4 is a schematic view of an outer plate of a battery module housing according to an embodiment of the present invention;

FIG. 5 is a top view of the outer panel shown in FIG. 4;

fig. 6 is a schematic view of an inner plate of a battery module housing according to an embodiment of the present invention;

FIG. 7 is a top view of the inner panel shown in FIG. 6;

fig. 8 is a schematic view of an upper support plate of a battery module housing according to an embodiment of the present invention;

fig. 9 is a schematic view of a lower support plate of a battery module housing according to an embodiment of the present invention;

fig. 10 is a schematic view of an elastic member of a battery module case according to an embodiment of the present invention;

fig. 11 is a schematic view of a battery module according to an embodiment of the present invention disposed in a lower case of a battery pack.

Description of reference numerals:

10-outer plate 11-mounting hole 20-inner plate 21-first groove 22-second groove 30-elastic piece

41-top baffle 42-upper side baffle

51-bottom baffle 52-lower side baffle

60-bolt 70-battery core 80-battery pack lower shell

Detailed Description

In the present invention, the embodiments and the features of the embodiments may be combined with each other without conflict.

The present invention will be described in detail with reference to the accompanying drawings in conjunction with embodiments.

As shown in fig. 1, the utility model provides a battery module shell, battery module shell includes shell body, the inner panel 20 and the setting of two relative settings are in the shell body with elastic component 30 between the inner panel 20, the shell body encloses into the rigid structure who is used for installing electric core, elastic component 30 makes and forms elastic connection between inner panel and the shell body, when electric core installs between two inner panels 20, elastic component 30, inner panel 20 are extruded between shell body and electric core, when electric core takes place the inflation, the bulging force that the electric core produced can extrude inner panel 20, thereby make elastic component 30 further compressed, thereby make the bulging force that the electric core produced obtain releasing, avoid causing electric core to be elongated because the unable release of bulging force of electric core, therefore the performance of electric core has been guaranteed. The above-mentioned "elongation" refers to the elongation of the battery cell along the direction parallel to the inner plate 20, and when the battery cell is elongated along the direction, the structure inside the battery cell may be affected, thereby damaging the battery cell.

In actual assembling process, there may be the condition that some parameter is not up to standard after the battery module assembly is accomplished, in order to recycle the electric core of these battery modules that are not up to standard, in the embodiment of this application, the shell body that constitutes rigid structure is can the split to be convenient for take out the electric core in the battery module shell.

As shown in fig. 2, the outer casing includes an outer plate 10 and a side wall portion, the elastic member 30 is disposed between the outer plate 10 and the inner plate 20, and both ends of the side wall portion are detachably connected to the outer plate 10, so that the outer plate 10 can be separated from the side wall portion, and after the outer plate 10 is separated from the side wall portion, the battery cell 70 can be easily removed.

In a preferred embodiment of the present application, as shown in fig. 3 and 5, the battery module housing includes a bolt 60, the outer plate 10 is formed with mounting holes 11 penetrating both end surfaces of the outer plate, the side wall part includes an upper support plate and a lower support plate, fig. 8 shows a structure of the upper support plate, the upper support plate includes an upper side baffle 42 and two top baffles 41 disposed at top ends of the upper side baffle and perpendicular to the upper side baffle 42, the two top baffles 41 are each formed with a through hole; fig. 9 shows the structure of the lower support plate, which includes a lower side baffle 52 and a whole bottom baffle 51 disposed at the bottom end of the lower side baffle 52 and perpendicular to the lower side baffle 52, so that the lower support plate forms an L-shaped structure, and both ends of the bottom baffle 51 are formed with a through hole.

Referring to fig. 2 and 3, the upper supporting plate is disposed at the top end of the outer plate 10, the through holes of the top baffle 41 are aligned with the mounting holes 11 of the outer plate 10, and the inner surface of the upper side baffle 42 is attached to the side ends of the outer plate 10 and the inner plate 20, wherein the space between the two top baffles 41 does not affect the top structure of the cell, so that the cell can be disposed at the correct position; the lower support plate is arranged at the bottom end of the outer plate 10, the two through holes of the bottom baffle 51 are respectively aligned with the mounting holes 11 on the two outer plates 10, the inner surface of the lower side baffle 52 is attached to the side ends of the outer plate 10 and the inner plate 20, and the bottom baffle 51 can support the battery cell arranged in the shell below.

As shown in fig. 3, bolts 60 are inserted through the through-holes of the top barrier 41, the mounting holes 11, and the through-holes of the bottom barrier 51 in this order from above, and the bottoms of the bolts 60 protrude from the lower ends of the mounting holes 11, so that the bolts 60 can be screwed with the battery pack lower case. The outer plate 10 and the side wall part can be fixedly connected by the bolts 60, so that the cell disposed between the two inner plates 20 is stopped by the upper side baffle 42 and the lower side baffle 52 at both sides and supported by the bottom baffle 51 at the bottom end, and the cell can be stably fixed in the battery module case.

The elastic member 30 may be a screw spring made of metal, a urethane elastic member, or the like. As shown in fig. 10, the elastic member 30 is preferably a polyurethane elastic member made of polyurethane elastomer, and a plurality of polyurethane elastic members may be disposed between the inner plate 20 and the outer plate 10 as required, in the embodiment shown in fig. 2, two polyurethane elastic members are disposed side by side between the inner plate and the outer plate, wherein, as shown in fig. 4 and 5, two first grooves 21 are formed on the plate surface of the outer plate 10 facing the elastic members, as shown in fig. 6 and 7, two second grooves 22 are formed on the plate surface of the inner plate 20 facing the elastic members, in the structure of the elastic member shown in fig. 10, the elastic member includes a wider first end and a narrower second end, the first end of the elastic member protrudes into the first groove 21 on the outer plate, the second end of the elastic member protrudes into the second groove 22 on the inner plate, and the sizes of the first end and the second end match the sizes of the first groove and the second groove, respectively, make the first end of elastic component and first recess and the second end and the second recess of elastic component form stable face contact to not only can prevent that the elastic component from going out from the landing between inner panel and planking, can also make inner panel and planking more even to the extrusion of elastic component, make the bulging force that electric core produced obtain good release. In the embodiment shown in fig. 2, the end of the elastic member having a relatively narrow dimension is connected to the inner panel and the end having a relatively wide dimension is connected to the outer panel, but the present invention is not limited thereto, and the end of the elastic member having a relatively narrow dimension may be connected to the outer panel and the end having a relatively wide dimension may be connected to the inner panel; and the number of the polyurethane elastic members provided between the inner panel and the outer panel is not limited to 2.

This application second aspect provides a battery module, as shown in fig. 2, between two inner panels 20, along the direction from an inner panel to another inner panel side by side be provided with 8 electric cores 70, can adopt the aerogel to carry out the adhesion between the adjacent electric core, the aerogel helps insulating against heat between the electric core, certain electric core inflation space can also be reserved in addition to avoid electric core to lengthen.

Further, an insulating paper is disposed between the cell 70 and the inner panel 20 to protect the cell and prevent short-circuiting of the cell.

In another aspect, the present invention further provides a battery pack, as shown in fig. 11, wherein the battery module is disposed in the lower case 80 of the battery pack, in a preferred embodiment of the present invention, a threaded mounting hole is formed in the lower case 80 of the battery pack, and the bottom of the bolt 60 can extend into the threaded mounting hole to be in threaded connection with the lower case of the battery pack, so that the battery module is connected with the lower case of the battery pack through the structure.

In which a certain pressing force, preferably 100-500Kgf, may be applied to the battery module at both sides of the outer plate 10 during the assembly of the battery module, and in order to achieve such pressing force, the battery module may be placed in the lower case by a mechanical device, such as a robot.

The last aspect of the present invention is to provide a car including the battery pack as described above.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A battery module housing, characterized in that the battery module housing comprises a housing body, two oppositely arranged inner plates (20) and an elastic member (30) arranged between the housing body and the inner plates (20),

the outer shell is enclosed into a rigid structure, and a battery cell is arranged between the two inner plates (20) so that the inner plates (20) and the elastic piece (30) can be squeezed between the battery cell and the outer shell.

2. The battery module housing according to claim 1, wherein the outer housing comprises an outer plate (10) and a side wall part, the elastic member (30) is disposed between the outer plate (10) and the inner plate (20), and both ends of the side wall part are detachably connected to the outer plate (10).

3. The battery module casing according to claim 2, wherein the elastic member (30) includes a first end and a second end in a direction from the outer plate (10) to the inner plate (20), a first groove (21) is formed on a plate surface of the outer plate (10), a second groove (22) is formed on a plate surface of the inner plate (20), the first end of the elastic member (30) is received in the first groove (21), and the second end of the elastic member (30) is received in the second groove (22).

4. The battery module case according to claim 2, wherein the battery module case includes bolts (60), the outer plate (10) is formed with mounting holes (11) penetrating both end surfaces of the outer plate (10),

the side wall part comprises an upper supporting plate and a lower supporting plate, the upper supporting plate comprises a top baffle plate (41) and an upper side baffle plate (42) which are perpendicular to each other, and the top baffle plate (41) is connected with the top end of the upper side baffle plate (42); the lower support plate comprises a bottom baffle plate (51) and a lower side baffle plate (52) which are perpendicular to each other, the bottom baffle plate (51) is connected with the bottom end of the lower side baffle plate (52),

wherein go up side baffle (42) with side baffle (52) laminate in planking (10) with the side setting of inner panel (20), just top baffle (41) with be provided with on bottom baffle (51) and correspond to the through-hole of mounting hole (11), bolt (60) run through the through-hole of top baffle (41), mounting hole (11) with the through-hole of bottom baffle (51) is in order to connect go up the backup pad, planking (10) with the bottom plate.

5. The battery module case according to any one of claims 1 to 4, wherein the elastic member (30) is a polyurethane elastic member.

6. A battery module, characterized in that the battery module comprises a cell (70) and the battery module housing of any one of claims 1 to 5, the cell (70) being arranged between two inner plates (20).

7. The battery module according to claim 6, characterized in that the battery module comprises a plurality of the battery cells (70), the plurality of the battery cells (70) are arranged in the battery module shell along the direction from one inner plate (20) to the other inner plate (20), and two adjacent battery cells (70) are adhesively connected.

8. The battery module according to claim 7, characterized in that two adjacent cells (70) are bonded by aerogel, and/or; and insulating paper is arranged between the inner plate (20) and the battery cell (70).

9. A battery pack, characterized in that the battery pack comprises a battery pack lower case (80) and the battery module according to any one of claims 6 to 8, and the battery module housing is connected to the battery pack lower case.

10. An automobile, characterized in that the automobile comprises the battery pack according to claim 9.