CN109980150B

CN109980150B - Battery pack and vehicle

Info

Publication number: CN109980150B
Application number: CN201910263310.5A
Authority: CN
Inventors: 王珏; 曲凡多; 任荣彬
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2019-04-02
Filing date: 2019-04-02
Publication date: 2022-03-22
Anticipated expiration: 2039-04-02
Also published as: CN109980150A

Abstract

The invention provides a battery pack and a vehicle. The battery pack includes a lower casing and an upper casing. The lower shell includes: a first side wall, a second side wall and a first bottom wall, the first side wall, the second side wall and the first bottom wall define a first installation slot; the upper shell includes: a third side wall , the fourth side wall and the second bottom wall, the third side wall, the fourth side wall and the second bottom wall define a second mounting groove, the first side wall, the second side wall, the third side wall, the fourth side The outer surfaces of the walls are provided with heat dissipation fins, and the interiors of the first bottom wall and the second bottom wall are provided with heat dissipation cavities. Therefore, through the cooperation of the lower casing and the upper casing, the heat dissipation effect of the battery pack can be improved, and thermal runaway of the battery pack can be avoided.

Description

Battery pack and vehicle

Technical Field

The invention relates to the technical field of vehicles, in particular to a battery pack and a vehicle with the battery pack.

Background

With the rapid development of lithium ion batteries, electric automobiles and electric transport vehicles become one of the most important methods for green energy conservation and emission reduction, however, as a large amount of heat generated by the batteries during operation is accumulated due to the influence of space, when the heat cannot be dissipated, the temperature unevenness at each position in the battery pack can influence the consistency of the battery module, even the charge-discharge cycle efficiency of the batteries is reduced, the power and energy output of the batteries are influenced, thermal runaway can be caused seriously, the safety and reliability of the battery pack are influenced, and the liquid cooling cost is too high when the liquid cooling is added to some hybrid electric vehicles and electric transport vehicles.

In the correlation technique, receive the space restriction, the double-deck battery module can not dismantle in the battery package, and the battery package is sealed the difficulty because of sealed face is too little, can't adapt to the forced air cooling environment. In addition, the heat dissipation efficiency inside the battery pack is poor. Meanwhile, the battery pack does not have a heating function, and the temperature of the battery pack is low under a cold condition, so that the battery pack cannot be in an optimal working state.

Disclosure of Invention

In view of this, the present invention is directed to a battery pack, which can solve the problem of poor heat dissipation efficiency inside the battery pack.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

a battery pack includes: a lower housing and an upper housing. The lower case includes: the first mounting groove is defined by the first side wall, the second side wall and the first bottom wall; the upper case includes: the second bottom wall is connected between the third side wall and the fourth side wall, the second bottom wall is located the third side wall the fourth side wall lower extreme, the third side wall the fourth side wall with the second bottom wall is injectd the second mounting groove, go up the casing set up in down the casing top just the second bottom wall is sealed the upper end of first mounting groove, the first side wall the second side wall the third side wall the outer face of keeping away of fourth side wall all has radiating fin, the first bottom wall the inside of second bottom wall all has the heat dissipation chamber.

In some examples of the invention, the battery pack further includes: the upper ends of the inner wall surfaces of the first side wall and the second side wall are respectively provided with a first assembling inclined surface, the outer wall surface of the second bottom wall is provided with a second assembling inclined surface which is suitable for being matched with the first assembling inclined surface, and the fastener penetrates through the first assembling inclined surface and the second assembling inclined surface so that the lower shell is fixedly connected with the upper shell.

In some examples of the present invention, the first fitting slope is arranged to extend from an outer side of the first side wall and an outer side of the second side wall to an inner side, and the second fitting slope is arranged to extend from an outer side of the outer wall surface of the second bottom wall to an inner side, in a direction from top to bottom.

In some examples of the invention, a sealant is arranged between the first assembly inclined surface and the second assembly inclined surface.

In some examples of the invention, the battery pack further includes: the heating plate, first diapire the top surface of second diapire all has mounting groove, the heating plate set up in the mounting groove.

In some examples of the invention, the battery pack further includes: connect the copper bar, the second diapire has the copper bar via hole, it passes to connect the copper bar via hole, so that battery module in the first mounting groove with battery module in the second mounting groove establishes ties.

In some examples of the invention, the battery pack further includes: the second bottom wall is provided with a main control wiring harness through hole, and the main control wiring harness assembly penetrates through the main control wiring harness through hole.

In some examples of the invention, the second bottom wall has a heat dissipation cavity inside, and the copper bar via hole and the main control wire harness via hole are not communicated with the heat dissipation cavity.

In some examples of the invention, the battery pack further includes: the cover body is arranged on the upper shell body in a covering mode to seal the upper end of the second mounting groove, and a sealing strip is arranged between the cover body and the upper shell body.

Compared with the prior art, the battery pack has the following advantages:

according to the battery pack, the lower shell and the upper shell are matched, so that the heat dissipation effect of the battery pack can be improved, and the thermal runaway of the battery pack can be avoided.

A vehicle comprises the battery pack.

The vehicle and the battery pack have the same advantages compared with the prior art, and the detailed description is omitted.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

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

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

fig. 3 is a schematic view of an upper case of a battery pack according to an embodiment of the present invention.

Description of reference numerals:

a battery pack 10;

a lower case 1; a first side wall 11; a second side wall 12; a first bottom wall 13; a first mounting groove 14; a first assembly ramp 15; heat radiating fins 16; a heat dissipation chamber 17; a mounting groove 18; a lower end plate 19;

an upper case 2; a third side wall 21; a fourth side wall 22; a second bottom wall 23; a second mounting groove 24; a second assembly ramp 25; copper bar via holes 26; a battery module 27; a master harness via 28; an upper end plate 29;

a fastener 3; a heating plate 4; connecting a copper bar 5; a main control wiring harness assembly 6; a lid body 7; a sealing strip 8; a left end plate 9.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

As shown in fig. 1 to 3, a battery pack 10 according to an embodiment of the present invention includes: a lower housing 1 and an upper housing 2. The lower case 1 includes: the battery pack 10 comprises a first side wall 11, a second side wall 12 and a first bottom wall 13, wherein the first bottom wall 13 is connected between the first side wall 11 and the second side wall 12, the first bottom wall 13 is located at the lower end of the first side wall 11 and the second side wall 12, the first side wall 11, the second side wall 12 and the first bottom wall 13 jointly define a first mounting groove 14, a lower battery module 27 in the battery pack 10 can be arranged in the first mounting groove 14, the lower housing 1 can further comprise a lower end plate 19, and the lower end plate 19 can be arranged at the right end of the lower housing 1 to seal the right end of the first mounting groove 14. The upper case 2 includes: the battery pack 10 may further include a third side wall 21, a fourth side wall 22, and a second bottom wall 23, the second bottom wall 23 is connected between the third side wall 21 and the fourth side wall 22, the second bottom wall 23 is located at the lower end of the third side wall 21 and the fourth side wall 22, the third side wall 21, the fourth side wall 22, and the second bottom wall 23 together define a second mounting groove 24, an upper battery module 27 in the battery pack 10 may be disposed in the second mounting groove 24, the upper case 2 may further include an upper end plate 29, and the upper end plate 29 may be disposed at the right end of the upper case 2 to seal the right end of the second mounting groove 24.

The battery pack 10 may further include: a left end plate 9, the left end plate 9 being disposed at left ends of the upper and

lower cases

2 and 1, the left end plate 9 being capable of sealing left ends of the first and

second mounting grooves

14 and 24. The upper case 2 may be disposed above the lower case 1, and the second bottom wall 23 may seal the upper end of the first mounting groove 14.

The outer wall surfaces of the first side wall 11, the second side wall 12, the third side wall 21 and the fourth side wall 22 may have heat dissipation fins 16. It should be noted that the heat dissipation fins 16 may extend in the longitudinal direction of the first side wall 11, the second side wall 12, the third side wall 21, and the fourth side wall 22, and the heat dissipation fins 16 may be provided in plurality, and the plurality of heat dissipation fins 16 are spaced apart in the height direction of the first side wall 11, the second side wall 12, the third side wall 21, and the fourth side wall 22. Wherein, radiating fin 16 has the heat dissipation function, and in battery package 10 course of operation, radiating fin 16 can cool down battery package 10, can avoid battery package 10 to take place thermal runaway.

The inside of first diapire 13, second diapire 23 all can have heat dissipation chamber 17, wherein, can have cold wind in the heat dissipation chamber 17, and in the battery package 10 course of operation, the heat dissipation chamber 17 of third lateral wall 21, fourth lateral wall 22, second diapire 23 all can be to the upper battery module 27 cooling, and the heat dissipation chamber 17 of first lateral wall 11, second lateral wall 12, first diapire 13 all can all be to the cooling of lower floor's battery module 27 to can further avoid battery package 10 to take place thermal runaway.

From this, through casing and last casing cooperation down, can promote the radiating effect of battery package, can avoid the battery package to take place thermal runaway.

In some embodiments of the present invention, the battery pack 10 may further include: the upper ends of the inner wall surfaces of the fastener 3, the first side wall 11 and the second side wall 12 may each have a first fitting slope 15, and the outer wall surface of the second bottom wall 23 may have a second fitting slope 25 adapted to cooperate with the first fitting slope 15. The fastening member 3 may pass through the first and second assembling

slopes

15 and 25, and thus the lower case 1 and the upper case 2 may be fixedly coupled together.

Wherein, two-layer about the battery module 27 in the battery package 10 goes up, and every layer of battery module 27 can arrange a plurality of electric cores, can have certain clearance between the adjacent electric core, and is thermal-insulated and compressible material formation a whole through increasing between adjacent electric core, and electric core lateral wall and underrun are glued through heat conduction structure and are evenly bonded with last casing 2 and casing 1 down. The two layers of battery modules 27 are laminated together through the lower shell 1 and the upper shell 2, so that the working purpose of arranging the two layers of battery modules 27 in the battery pack 10 can be realized, the internal space of the battery pack 10 can be saved, and the battery modules 27 can be conveniently detached. Specifically, the fastener 3 may be a bolt, and in the process of assembling the lower housing 1 and the upper housing 2, the first assembly inclined surface 15 and the second assembly inclined surface 25 are matched, so that the lower housing 1 and the upper housing 2 can be assembled conveniently, the contact area between the lower housing 1 and the upper housing 2 can be increased, the assembly reliability between the lower housing 1 and the upper housing 2 can be improved, and the assembly tolerance between the lower housing 1 and the upper housing 2 can be absorbed. Meanwhile, the lower shell 1 and the upper shell 2 are connected through the bolts, so that the lower shell 1 and the upper shell 2 can be conveniently disassembled and assembled, and the disassembling and assembling efficiency can be improved.

In addition, when the lower shell 1 and the upper shell 2 are connected through the fasteners 3, the fasteners 3 sequentially penetrate through the lower shell 1, the first assembling inclined surface 15, the second assembling inclined surface 25 and the upper shell 2, the included angle between each fastener 3 and the lower shell 1 can be 95-150 degrees, the fasteners 3 can be arranged in a plurality of numbers, the fasteners 3 are arranged along the length direction of the lower shell 1 (namely the left and right directions of the lower shell 1), the fasteners 3 are arranged on a straight line, the distance between any two adjacent fasteners 3 is 50-200 mm, the lower shell 1 and the upper shell 2 can be assembled together better through the arrangement, the overall structural strength of the lower shell 1 and the upper shell 2 can be improved, and the structural strength of the battery pack 10 can be guaranteed.

From this, through casing 1 down, go up casing 2 and the cooperation of fastener 3, can make casing 1 and last casing 2 range upon range of together down, can realize setting up the work purpose of double-deck battery module 27 in battery package 10, thereby can save battery package 10 inner space, and, also can be in order to make things convenient for the dismantlement of casing 1 and last casing 2 down, dress, thereby can promote to tear open, dress efficiency, and simultaneously, can also increase the area of contact of casing 1 and last casing 2 down, can promote casing 1 and last casing 2's assembly reliability down.

In some embodiments of the present invention, the first assembly slopes 15 may extend from the outer sides of the first and

second sidewalls

11 and 12 to the inner side, and the second assembly slopes 25 may extend from the outer sides of the outer wall surfaces of the second bottom wall 23 to the inner side. Note that the outer side of the first side wall 11 refers to the front side in fig. 2, the inner side of the first side wall 11 refers to the rear side in fig. 2, the outer side of the second side wall 12 refers to the rear side in fig. 2, and the inner side of the second side wall 12 refers to the front side in fig. 2. This arrangement enables the first fitting slope 15 and the second fitting slope 25 to be fitted together better, and the contact area of the first fitting slope 15 and the second fitting slope 25 can be increased, so that the fitting stability of the lower case 1 and the upper case 2 can be improved.

In some embodiments of the present invention, a sealant may be disposed between the first assembling inclined surface 15 and the second assembling inclined surface 25, and the sealant has a sealing effect, so that the connection between the first assembling inclined surface 15 and the second assembling inclined surface 25 can be sealed, and the sealing performance of the battery pack 10 can be improved. Furthermore, the first assembly inclined surface 15 and the second assembly inclined surface 25 are matched, so that the sealing area can be increased, and the sealing performance of the battery pack 10 can be further improved.

In some embodiments of the present invention, as shown in fig. 1, the battery pack 10 may further include: the heating plate 4, the top surfaces of the first bottom wall 13 and the second bottom wall 23 may have mounting grooves 18, it should be explained that the top surfaces of the first bottom wall 13 and the second bottom wall 23 refer to the upper surfaces of the first bottom wall 13 and the second bottom wall 23, and the heating plate 4 may be disposed in the mounting grooves 18. Wherein, hot plate 4 has the heating function, and hot plate 4 can be through heat-conducting glue laminating in battery module 27's bottom and mounting groove 18, and when battery package 10 had the heating demand, hot plate 4 can heat battery module 27 to can make battery package 10 have heating and cooling function.

In some embodiments of the present invention, as shown in fig. 1 and 3, the battery pack 10 may further include: connect copper bar 5, second diapire 23 can have copper bar through hole 26, connects copper bar 5 and passes copper bar through hole 26, so sets up battery module 27 that can make in the first mounting groove 14 and the battery module 27 in the second mounting groove 24 and establish ties together to can guarantee that battery package 10 normally works.

In some embodiments of the present invention, as shown in fig. 1 and 3, the battery pack 10 may further include: the main control harness assembly 6 and the second bottom wall 23 may have a main control harness through hole 28, and the main control harness assembly 6 may pass through the main control harness through hole 28, so as to facilitate routing of the main control harness assembly 6, and connection of the upper battery module 27 and the lower battery module 27 with the main control harness can be realized.

In some embodiments of the present invention, the heat dissipation cavity 17 is formed inside the second bottom wall 23, and the copper bar through hole 26 and the main control wire harness through hole 28 are not communicated with the heat dissipation cavity 17, so that the connection between the copper bar through hole 26 and the main control wire harness through hole 28 and the heat dissipation cavity 17 can be avoided, and the sealing performance of the battery pack 10 can be further ensured.

In some embodiments of the present invention, the battery pack 10 may further include: the lid 7, lid 7 can be established on last casing 2, and the upper end of second mounting groove 24 can be sealed to lid 7, can have sealing strip 8 between lid 7 and last casing 2. This arrangement enables the battery pack 10 to be better sealed, and foreign substances can be prevented from entering the battery pack 10, so that the operational reliability of the battery pack 10 can be ensured.

According to the vehicle provided by the embodiment of the invention, the battery pack 10 comprises the battery pack 10 provided by the embodiment, the battery pack 10 is arranged and installed on the vehicle, the battery pack 10 can improve the heat dissipation effect of the battery pack 10, the thermal runaway of the battery pack 10 can be avoided, and the driving safety of the vehicle can be improved.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. A battery pack (10), comprising:

a lower case (1), the lower case (1) comprising: a first side wall (11), a second side wall (12) and a first bottom wall (13), wherein the first bottom wall (13) is connected between the first side wall (11) and the second side wall (12), the first bottom wall (13) is positioned at the lower end of the first side wall (11) and the second side wall (12), and the first side wall (11), the second side wall (12) and the first bottom wall (13) define a first mounting groove (14);

an upper housing (2), the upper housing (2) comprising: a third side wall (21), a fourth side wall (22) and a second bottom wall (23), the second bottom wall (23) being connected between the third side wall (21) and the fourth side wall (22), and the second bottom wall (23) is positioned at the lower ends of the third side wall (21) and the fourth side wall (22), the third side wall (21), the fourth side wall (22) and the second bottom wall (23) define a second mounting groove (24), the upper shell (2) is arranged above the lower shell (1) and the second bottom wall (23) seals the upper end of the first mounting groove (14), the outer surfaces of the first side wall (11), the second side wall (12), the third side wall (21) and the fourth side wall (22) are all provided with heat radiating fins (16), the first bottom wall (13) and the second bottom wall (23) are internally provided with heat dissipation cavities (17);

further comprising: the upper ends of the inner wall surfaces of the first side wall (11) and the second side wall (12) are respectively provided with a first assembly inclined surface (15), the outer wall surface of the second bottom wall (23) is provided with a second assembly inclined surface (25) matched with the first assembly inclined surface (15), and the fastener (3) penetrates through the first assembly inclined surface (15) and the second assembly inclined surface (25) so as to fixedly connect the lower shell (1) and the upper shell (2);

and a sealant is arranged between the first assembly inclined plane (15) and the second assembly inclined plane (25).

2. The battery pack (10) according to claim 1, wherein the first fitting slope (15) is arranged to extend from an outer side of the first side wall (11) to an inner side of the second side wall (12), and the second fitting slope (25) is arranged to extend from an outer side of the outer wall surface of the second bottom wall (23) to an inner side thereof, in a direction from top to bottom.

3. The battery pack (10) according to claim 1, further comprising: the heating plate (4), the top surface of first diapire (13), second diapire (23) all has mounting groove (18), heating plate (4) set up in mounting groove (18).

4. The battery pack (10) according to claim 1, further comprising: connect copper bar (5), second diapire (23) has copper bar via hole (26), it passes to connect copper bar (5) copper bar via hole (26), so that battery module (27) in first mounting groove (14) with battery module (27) in second mounting groove (24) establish ties.

5. The battery pack (10) according to claim 4, further comprising: a master wiring harness assembly (6), the second bottom wall (23) having a master wiring harness via hole (28), the master wiring harness assembly (6) passing through the master wiring harness via hole (28).

6. The battery pack (10) of claim 5, wherein the copper bar via (26) and the main control wire harness via (28) are not in communication with the heat dissipation cavity (17).

7. The battery pack (10) according to claim 1, further comprising: the cover body (7), establish in the lid (7) in order to seal on the last casing (2) the upper end of second mounting groove (24), lid (7) with sealing strip (8) have between last casing (2).

8. A vehicle, characterized by comprising a battery pack (10) according to any one of claims 1-7.