CN109980150A - Battery pack and vehicle - Google Patents

Abstract

The present invention provides a kind of battery pack and vehicle, battery pack includes: lower case and upper housing.Lower case includes: the first side wall, second sidewall and the first bottom wall, and the first side wall, second sidewall and the first bottom wall limit the first mounting groove；Upper housing includes: third side wall, the 4th side wall and the second bottom wall, third side wall, the 4th side wall and the second bottom wall limit the second mounting groove, the first side wall, second sidewall, third side wall, the 4th side wall outer face of keeping away all have radiating fin, the first bottom wall, the second bottom wall inside all have heat dissipation cavity.Cooperated as a result, by lower case and upper housing, be able to ascend the heat dissipation effect of battery pack, thermal runaway can occur to avoid battery pack.

Description

battery pack and vehicle

technical field

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

Background technique

With the rapid development of lithium-ion batteries, electric vehicles and electric transport vehicles have become one of the most important methods for green energy conservation and emission reduction. However, due to the accumulation of a large amount of heat generated by the battery during operation due to the influence of space, when the heat cannot be dissipated, the battery pack Uneven temperature throughout the interior will affect the consistency of the battery module, even reduce the battery charge-discharge cycle efficiency, affect the power and energy output of the battery, and lead to thermal runaway in severe cases, affecting the safety and reliability of the battery pack. Adding liquid cooling to some hybrids and electric haulers is too costly.

In the related art, due to space constraints, the double-layer battery module in the battery pack cannot be disassembled, and the battery pack is difficult to seal because the sealing surface is too small, and cannot be adapted to an air-cooled environment. Moreover, the heat dissipation efficiency inside the battery pack is poor. At the same time, the battery pack does not have a heating function. Under cold conditions, the temperature of the battery pack is low, which cannot make the battery pack in the best working condition.

SUMMARY OF THE INVENTION

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

In order to achieve the above object, the technical scheme of the present invention is achieved in this way:

A battery pack includes: a lower case and an upper case. The lower case includes: a first side wall, a second side wall and a first bottom wall, the first bottom wall is connected between the first side wall and the second side wall, and the first side wall is A bottom wall is located at the lower end of the first side wall and the second side wall, the first side wall, the second side wall and the first bottom wall define a first installation groove; the upper shell The body includes: a third side wall, a fourth side wall and a second bottom wall, the second bottom wall is connected between the third side wall and the fourth side wall, and the second bottom wall is located The third side wall, the lower end of the fourth side wall, the third side wall, the fourth side wall and the second bottom wall define a second installation groove, and the upper shell is arranged at the Above the lower casing and the second bottom wall seals the upper end of the first installation groove, the first side wall, the second side wall, the third side wall and the fourth side wall are The outer shelter surfaces are provided with radiating fins, and the interiors of the first bottom wall and the second bottom wall are provided with radiating cavities.

In some examples of the present invention, the battery pack further includes: a fastener, the upper ends of the inner wall surfaces of the first side wall and the second side wall each have a first assembling slope, and the second bottom The outer wall surface of the wall has a second assembling slope suitable for matching with the first assembling slope, and the fastener passes through the first assembling slope and the second assembling slope, so that the lower casing is connected to the second assembling slope. The upper casing is fixedly connected.

In some examples of the present invention, in a top-to-bottom direction, the first assembling slope extends from the outer side to the inner side of the first side wall and the second side wall, and the second assembling slope is formed by The outer side of the outer wall surface of the second bottom wall is arranged to extend toward the inner side.

In some examples of the present invention, there is a sealant between the first assembling slope and the second assembling slope.

In some examples of the present invention, the battery pack further includes: a heating plate, the first bottom wall and the top surface of the second bottom wall both have installation grooves, and the heating plate is disposed on the installation in the groove.

In some examples of the present invention, the battery pack further includes: a connecting copper bar, the second bottom wall has a copper bar via hole, and the connecting copper bar passes through the copper bar via hole, so that the The battery modules in the first installation slot are connected in series with the battery modules in the second installation slot.

In some examples of the present invention, the battery pack further includes: a main control wire harness assembly, the second bottom wall has a main control wire harness via hole, and the main control wire harness assembly passes through the main control wire harness hole.

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

In some examples of the present invention, the battery pack further includes: a cover body, the cover body is covered on the upper case to seal the upper end of the second installation groove, the cover body is connected to the There is a sealing strip between the upper shells.

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

According to the battery pack of the present invention, through the cooperation of the lower case and the upper case, the heat dissipation effect of the battery pack can be improved, and thermal runaway of the battery pack can be avoided.

A vehicle comprising the above-mentioned battery pack.

The vehicle and the above-mentioned battery pack have the same advantages over the prior art, which will not be repeated here.

Description of drawings

The accompanying drawings constituting a part of the present invention are used to provide further understanding of the present invention, and the exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the attached image:

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

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

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

Description of reference numbers:

battery pack 10;

Lower casing 1; first side wall 11; second side wall 12; first bottom wall 13; first installation groove 14; first assembly slope 15; heat dissipation fin 16; heat dissipation cavity 17; board 19;

The upper shell 2; the third side wall 21; the fourth side wall 22; the second bottom wall 23; the second installation slot 24; hole 28; upper end plate 29;

Fastener 3; heating plate 4; connecting copper bar 5; main control harness assembly 6; cover 7; sealing strip 8; left end plate 9.

Detailed ways

It should be noted that the embodiments of the present invention and the features of the embodiments may be combined with each other under the condition of no conflict.

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

As shown in FIGS. 1-3 , a battery pack 10 according to an embodiment of the present invention includes: a lower case 1 and an upper case 2 . The lower casing 1 includes: a first side wall 11, a second side wall 12 and a first bottom wall 13, the first bottom wall 13 is connected between the first side wall 11 and the second side wall 12, and the first bottom wall 13 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 together define a first installation slot 14. The lower battery module in the battery pack 10 27 can be disposed in the first installation groove 14 , the lower casing 1 can further include a lower end plate 19 , and the lower end plate 19 can be disposed at the right end of the lower casing 1 to seal the right end of the first installation groove 14 . The upper casing 2 includes: 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, and 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 installation slot 24. The upper battery module in the battery pack 10 27 can be disposed in the second installation groove 24 , the upper casing 2 can further include an upper end plate 29 , and the upper end plate 29 can be disposed on the right end of the upper casing 2 to seal the right end of the second installation groove 24 .

The battery pack 10 may further include: a left end plate 9 disposed on the left ends of the upper casing 2 and the lower casing 1 , and the left end plate 9 can seal the left ends of the first installation groove 14 and the second installation groove 24 . The upper casing 2 can be disposed above the lower casing 1 , and the second bottom wall 23 can seal the upper end of the first installation 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 all have heat dissipation fins 16 . It should be noted that the heat dissipation fins 16 can be extended and arranged in the length 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 can be provided in multiples. 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 . The heat dissipation fins 16 have a heat dissipation function. During the operation of the battery pack 10 , the heat dissipation fins 16 can cool the battery pack 10 , thereby avoiding thermal runaway of the battery pack 10 .

The inside of the first bottom wall 13 and the second bottom wall 23 may have a heat dissipation cavity 17, wherein the heat dissipation cavity 17 may have cold air. During the operation of the battery pack 10, the third side wall 21, the fourth side wall 22, the The heat dissipation cavity 17 of the second bottom wall 23 can all cool the upper battery module 27, and the first side wall 11, the second side wall 12, and the heat dissipation cavity 17 of the first bottom wall 13 can all cool the lower battery module 27. Therefore, thermal runaway of the battery pack 10 can be further avoided.

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.

In some embodiments of the present invention, the battery pack 10 may further include: a fastener 3, the upper ends of the inner wall surfaces of the first side wall 11 and the second side wall 12 may each have a first assembly slope 15, and the second bottom wall The outer wall surface of 23 may have a second assembling slope 25 adapted to cooperate with the first assembling slope 15 . The fasteners 3 can pass through the first assembling slope 15 and the second assembling slope 25 , so that the lower casing 1 and the upper casing 2 can be fixedly connected together.

The battery modules 27 in the battery pack 10 are divided into upper and lower layers, and each layer of the battery modules 27 can be arranged with a plurality of cells, and there may be a certain gap between the adjacent cells. Heat insulation and compressible materials are added to form a whole, and the side wall and bottom surface of the cell are uniformly bonded to the upper casing 2 and the lower casing 1 by means of thermally conductive structural adhesive. The two-layer battery module 27 is stacked together through the lower casing 1 and the upper casing 2, so that the working purpose of arranging the double-layer battery module 27 in the battery pack 10 can be realized, so that the internal space of the battery pack 10 can be saved, and the battery pack 10 can be easily Disassembly of module 27. Specifically, the fastener 3 can be a bolt. During the process of assembling the lower casing 1 and the upper casing 2, the first assembly inclined surface 15 and the second assembly inclined surface 25 cooperate to facilitate the lower casing 1 and the upper casing. 2 can increase the contact area between the lower casing 1 and the upper casing 2, thereby improving the assembly reliability of the lower casing 1 and the upper casing 2, and can also absorb the lower casing 1 and the upper casing. 2 assembly tolerances. Meanwhile, by connecting the lower casing 1 and the upper casing 2 with bolts, the disassembly and assembly of the lower casing 1 and the upper casing 2 can be facilitated, and the disassembly and assembly efficiency can be improved.

In addition, when the fastener 3 connects the lower casing 1 and the upper casing 2, the fastener 3 passes through the lower casing 1, the first assembling slope 15, the second assembling slope 25, and the upper casing 2 in sequence, and tightens The included angle between the part 3 and the lower casing 1 can be 95°-150°, the fasteners 3 can be arranged in multiples, and the plurality of fasteners 3 are arranged along the length direction of the lower casing 1 (that is, the Left and right direction), a plurality of fasteners 3 are in a straight line, and the distance between any two adjacent fasteners 3 is 50mm-200mm. This arrangement can better connect the lower casing 1 and the upper casing 2 When assembled together, the overall structural strength of the lower casing 1 and the upper casing 2 can be improved, thereby ensuring the structural strength of the battery pack 10 .

Therefore, through the cooperation of the lower case 1 , the upper case 2 and the fastener 3 , the lower case 1 and the upper case 2 can be stacked together, and the double-layer battery module 27 can be arranged in the battery pack 10 . Therefore, the internal space of the battery pack 10 can be saved, and the disassembly and assembly of the lower casing 1 and the upper casing 2 can also be facilitated, so that the disassembly and assembly efficiency can be improved, and at the same time, the lower casing 1 and the upper casing 2 can be increased. The contact area of the upper casing 2 can improve the assembly reliability of the lower casing 1 and the upper casing 2 .

In some embodiments of the present invention, in the top-to-bottom direction, the first mounting slope 15 may extend from the outer side of the first side wall 11 and the second side wall 12 to the inner side, and the second mounting slope 25 may extend from the first side wall 11 and the second side wall 12 to the inner side. The outer wall surfaces of the second bottom walls 23 are arranged to extend from the outside to the inside. It should be noted 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 , and the outer side of the second side wall 12 refers to the front side in FIG. 2 . The rear side, the inner side of the second side wall 12 refers to the front side in FIG. 2 . In this way, the first assembly inclined surface 15 and the second assembly inclined surface 25 can be better assembled together, and the contact area between the first assembly inclined surface 15 and the second assembly inclined surface 25 can be increased, so that the lower casing 1 and the upper casing can be lifted. Assembly stability of body 2.

In some embodiments of the present invention, a sealant may be provided between the first assembling slope 15 and the second assembling slope 25 , and the sealant has a sealing effect, so that the connection between the first assembling slope 15 and the second assembling slope 25 can be ensured. Sealing can improve the airtightness of the battery pack 10 . In addition, through the cooperation of the first assembling slope 15 and the second assembling slope 25 , 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: a heating plate 4 , and the top surfaces of the first bottom wall 13 and the second bottom wall 23 may have mounting grooves 18 , which need to be explained. However, 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 can be arranged in the installation groove 18 . Among them, the heating plate 4 has a heating function, and the heating plate 4 can be attached to the bottom of the battery module 27 and the installation groove 18 by means of thermal conductive adhesive. When the battery pack 10 needs to be heated, the heating plate 4 can heat the battery module 27 heating, so that the battery pack 10 can have heating and cooling functions.

In some embodiments of the present invention, as shown in FIG. 1 and FIG. 3 , the battery pack 10 may further include: a connection copper bar 5 , the second bottom wall 23 may have a copper bar via hole 26 , and the connection copper bar 5 passes through the copper bar 5 . The via holes 26 are arranged so that the battery modules 27 in the first installation slot 14 and the battery modules 27 in the second installation slot 24 can be connected in series, thereby ensuring the normal operation of the battery pack 10 .

In some embodiments of the present invention, as shown in FIGS. 1 and 3 , the battery pack 10 may further include: a main control wire harness assembly 6 , the second bottom wall 23 may have a main control wire harness via hole 28 , and the main control wire harness assembly The component 6 can pass through the main control wiring harness via 28, which can facilitate the routing of the main control wiring harness assembly 6, and can realize the connection of the upper battery module 27 and the main control wiring harness of the lower battery module 27.

In some embodiments of the present invention, the second bottom wall 23 has a heat dissipation cavity 17 inside, and the copper bar vias 26 and the main control harness vias 28 are not connected to the heat dissipation cavity 17 . This arrangement can avoid the copper bar vias 26 . The via holes 28 of the main control harness are all communicated with the heat dissipation cavity 17 , which can further ensure the tightness of the battery pack 10 .

In some embodiments of the present invention, the battery pack 10 may further include: a cover body 7 , the cover body 7 may be provided on the upper case 2 , the cover body 7 may seal the upper end of the second installation groove 24 , and the cover body 7 is connected to the upper case 2 . There may be a sealing strip 8 between the housings 2 . In this way, the battery pack 10 can be better sealed, foreign substances can be prevented from entering the battery pack 10 , and the working reliability of the battery pack 10 can be ensured.

The vehicle according to the embodiment of the present invention includes the battery pack 10 of the above-mentioned 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 , and can avoid thermal runaway of the battery pack 10 . Improve the driving safety of the vehicle.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the present invention. within the scope of protection.

Claims (10)

1. a kind of battery pack (10) characterized by comprising

Lower case (1), the lower case (1) include: the first side wall (11), second sidewall (12) and the first bottom wall (13), described First bottom wall (13) is connected between the first side wall (11) and the second sidewall (12), and first bottom wall (13) position In the first side wall (11), the second sidewall (12) lower end, the first side wall (11), the second sidewall (12) and institute It states the first bottom wall (13) and limits the first mounting groove (14)；

Upper housing (2), the upper housing (2) include: third side wall (21), the 4th side wall (22) and the second bottom wall (23), described Second bottom wall (23) is connected between the third side wall (21) and the 4th side wall (22), and second bottom wall (23) position In the third side wall (21), the 4th side wall (22) lower end, the third side wall (21), the 4th side wall (22) and institute It states the second bottom wall (23) to limit the second mounting groove (24), the upper housing (2) is set to above the lower case (1) and described Second bottom wall (23) seals the upper end of first mounting groove (14), the first side wall (11), the second sidewall (12), institute State third side wall (21), the outer face of keeping away of the 4th side wall (22) all has radiating fin (16), first bottom wall (13), institute The inside for stating the second bottom wall (23) all has heat dissipation cavity (17).

2. battery pack (10) according to claim 1, which is characterized in that further include: fastener (3), the first side wall (11), the upper end of the inner wall of the second sidewall (12) all has the first assembly inclined-plane (15), second bottom wall (23) Outside wall surface has the second assembly inclined-plane (25) being suitable for the first assembly inclined-plane (15) cooperation, and the fastener (3) passes through First assembly inclined-plane (15) and second assembly inclined-plane (25), so that the lower case (1) and the upper housing (2) are solid Fixed connection.

3. battery pack (10) according to claim 2, which is characterized in that in direction from top to bottom, first assembly Inclined-plane (15) is disposed to extend inwardly by the outside of the first side wall (11), the second sidewall (12), second assembly Inclined-plane (25) is disposed to extend inwardly by the outside of the outside wall surface of second bottom wall (23).

4. battery pack (10) according to claim 2, which is characterized in that first assembly inclined-plane (15) and described second There is sealant between assembly inclined-plane (25).

5. battery pack (10) according to claim 1, which is characterized in that further include: heating plate (4), first bottom wall (13), the top surface of second bottom wall (23) all has installation groove (18), and the heating plate (4) is set to the installation groove (18) in.

6. battery pack (10) according to claim 1, which is characterized in that further include: connecting copper bar (5), second bottom Wall (23) has copper bar via hole (26), and the connecting copper bar (5) passes through the copper bar via hole (26), so that first mounting groove (14) battery modules (27) in are connected with the battery modules (27) in second mounting groove (24).

7. battery pack (10) according to claim 1, which is characterized in that further include: master control bundle assembly (6), described Two bottom walls (23) have master control wire harness passing-hole (28), and the master control bundle assembly (6) passes through the master control wire harness passing-hole (28).

8. the battery pack (10) that according to claim 6 or 7 is stated, which is characterized in that the copper bar via hole (26), the master control harness Via hole (28) is not connected to the heat dissipation cavity (17).

9. battery pack (10) according to claim 1, which is characterized in that further include: lid (7), the lid (7) are located at The upper end that second mounting groove (24) is sealed on the upper housing (2), has between the lid (7) and the upper housing (2) There are sealing strip (8).

10. a kind of vehicle, which is characterized in that including battery pack of any of claims 1-9 (10).