CN212625866U

CN212625866U - Battery box, battery package and car

Info

Publication number: CN212625866U
Application number: CN202021732379.2U
Authority: CN
Inventors: 邓江南; 刘晨南; 姜斌
Original assignee: Dongguan Tafel New Energy Technology Co Ltd; Jiangsu Tafel New Energy Technology Co Ltd; Jiangsu Tafel Power System Co Ltd
Current assignee: Jiangsu Zenio New Energy Battery Technologies Co Ltd
Priority date: 2020-08-19
Filing date: 2020-08-19
Publication date: 2021-02-26
Anticipated expiration: 2030-08-19

Abstract

The utility model discloses a battery box, battery package and car. The battery pack comprises a battery box and a battery module. The battery box comprises two end plates, two side plates, a bottom plate, an end cross beam and a middle cross beam, wherein the end cross beam and the middle cross beam are arranged in the battery box. The end plates and the side plates are L-shaped structural plate bodies consisting of vertical laths and horizontal laths. The bottom plate is connected with the bottom surface of the horizontal lath in a welding way. The middle cross beam is arranged in the middle of the battery box. The two ends of the middle cross beam are respectively erected on the horizontal laths and are connected with the horizontal laths in a welding way, and are connected with the vertical laths in a welding way through end connection plates at the two ends. Two ends of the battery module are erected on the horizontal strip plate and fixedly connected with the horizontal strip plate in a bolt mode. When the battery pack is arranged in an automobile, the middle cross beam is perpendicular to the advancing direction of the automobile. The utility model discloses the whole physical strength of battery package has been strengthened greatly to greatly increased the anti collision impact strength of four sides, and through the battery module of list arrangement, reduced the battery module clearance, improved battery package energy density.

Description

Battery box, battery package and car

Technical Field

The utility model relates to an electric automobile's battery pack joins in marriage technique.

Background

In the battery pack assembly technology of the electric automobile, the physical strength and the collision impact resistance strength of the battery pack and the energy density of the battery pack are three key technical indexes. In the related art, in a battery pack constructed of battery modules, the battery modules are generally arranged in an M × N array. In the mxn array of battery modules, a large gap is generally required between the battery modules for the wiring and the buffering between the battery modules. The clearance between the battery module and the battery module occupies more space of the battery pack, and the overall energy density of the battery pack is reduced. On the other hand, when the battery modules arranged in the M × N array are disposed in the battery box of the battery pack, it is difficult to arrange the transverse beams and the longitudinal beams that reinforce the physical structure in the battery box, so that the physical strength of the battery box itself is insufficient, and the impact strength against collision is insufficient.

Disclosure of Invention

The utility model discloses the problem that will solve: the physical strength and the impact strength of the battery pack are enhanced, and the energy density of the battery pack is increased.

In order to solve the above problem, the utility model discloses a scheme as follows:

the battery box comprises a box body; the box body comprises two end plates, two side plates and a bottom plate; the two end plates, the two side plates and the bottom plate form an accommodating cavity with an opening at the top end; the two end plates are respectively positioned at the front end and the rear end and are opposite and parallel; the two side plates are opposite and parallel; the device also comprises two end cross beams and at least one middle cross beam which are arranged in the accommodating cavity; the two end beams are respectively positioned at the front end and the rear end and are parallel to the end plates, and the two ends are respectively connected with the side plates; the middle cross beam is positioned in the middle of the containing cavity, is parallel to the end plates, and is connected with the side plates at two ends respectively, and the containing cavity is divided into a plurality of sub containing cavities.

Further, according to the battery box of the present invention, the side plate includes a vertical slat and a horizontal slat; the vertical laths are fixedly connected with the horizontal laths to form an L-shaped structure; the horizontal ribbon board is arranged towards the interior of the box body; the bottom plate is fixedly connected with the bottom surface of the horizontal batten; two ends of the middle cross beam are respectively erected on the horizontal laths; the two ends of the middle cross beam are respectively provided with a butt plate, so that the middle cross beam is in an H-shaped structure; the end joint plate is fixedly connected with the vertical lath.

Further, according to the utility model discloses a battery box is provided with a plurality of bolt installation pieces on the horizontal slat.

Furthermore, the battery box of the utility model also comprises a box cover; the box cover is used for covering the top of the box body and sealing the accommodating cavity; a plurality of cover body supporting columns are arranged on the middle cross beam; when the case lid is at the box top, the lid support column pushes up the below of case lid to for the case lid provides the support.

The battery pack comprises the battery box and a plurality of battery modules arranged in the battery box accommodating cavity; the battery module is rectangular shape, and its rectangular direction is on a parallel with the end plate, and both ends and bolt installation piece are fixed continuous.

Further, according to the battery pack of the utility model, two ends of the middle cross beam are provided with step grooves; and a pipeline channel with a through front end and a through rear end is formed between the inner side of the vertical batten and the end surface of the battery module and above the stepped groove.

Furthermore, the battery pack of the utility model also comprises a liquid cooling plate and a heat preservation pad; the heat insulation pad is arranged on the bottom plate and clings to the bottom plate; the liquid cooling plate is arranged on the heat-insulating pad and is positioned below the battery module.

Further, the battery pack according to the utility model also comprises a module pressing bar; the module pressing bar is parallel to the side plate and is pressed on the battery module; two ends and the middle of the module pressing bar are respectively and fixedly connected with the two end cross beams and the middle cross beam.

Further, according to the battery pack of the present invention, the battery box further comprises a box cover; the box cover is used for covering the top of the box body and sealing the accommodating cavity; a plurality of cover body supporting columns are arranged on the middle cross beam; when the case lid is at the box top, the lid support column pushes up the below of case lid to for the case lid provides the support.

According to the utility model discloses a car, this car are provided with foretell battery package, well crossbeam perpendicular to car advancing direction in the battery package.

The technical effects of the utility model are as follows:

1. the L-shaped structures of the end plates and the side plates enhance the physical strength of the overall structure of the box body, enhance the connection strength of the bottom plate and enhance the four-side impact strength of the box body.

2. The physical strength of the whole structure of the box body is enhanced by the side plate connection mode that the end cross beam and the middle cross beam are arranged in the box body and the two ends of the end cross beam and the middle cross beam are erected on the L-shaped structure.

3. Through the connected mode that battery module both ends were directly erect at the curb plate of L shape structure, combine the pressure of module layering to hold, strengthen the connection physical strength of battery module assembly in the box greatly.

4. The battery module length is long enough for battery module both ends directly can erect on the curb plate of L shape structure, reduces the clearance space between battery module and the battery module from this, thereby has improved the holistic energy density of battery package.

Drawings

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

Fig. 2 is a top view of the embodiment of the battery pack according to the present invention after the case cover is hidden.

Fig. 3 is a schematic perspective view of the case.

Fig. 4 is a schematic perspective view of the middle cross member.

Fig. 5 is a schematic view illustrating the connection of the side plates to the cross member of the battery module.

Fig. 6 is a schematic structural diagram of an embodiment of the present invention.

Wherein the content of the first and second substances,

1 is a box body, 11 is an end plate, 12 is a side plate, 121 is a vertical lath, 122 is a horizontal lath, 13 is a bottom plate, 141 is a battery pack explosion-proof valve, 142 is an electrical interface, 143 is a liquid inlet, 144 is a liquid outlet, 15 is a bolt mounting block, 18 is a mounting wing, 19 is an accommodating cavity, 191 is a pipeline channel, 192 is a top gap, and 2 is a box cover;

3 is a battery module, 31 is a blast hole;

41 is an end beam, 42 is a middle beam, 421 is a beam main body, 422 is an end connecting plate, 423 is a step groove, 429 is a cover body supporting column, and 43 is a module pressing strip;

51 is a liquid cooling plate, 52 is a water inlet pipe, 53 is a water outlet pipe, and 54 is a heat preservation pad;

reference numeral 900 denotes an automobile, 901 denotes a battery pack, and R denotes an automobile traveling direction.

Detailed Description

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

As shown in fig. 1, 2 and 3, the battery pack includes a battery box, and a battery module 3 and a liquid cooling assembly disposed in the battery box. The battery box comprises a box body 1, a box cover 2, an end beam 41 and a middle beam 42. The box body 1 comprises two end plates 11, two side plates 12 and a bottom plate 13. The two end plates 11, the two side plates 12 and the bottom plate 13 enclose an accommodating cavity 19 with an open top end. The case cover 2 is used to cover the top of the case body 1 to seal the accommodation chamber 19, thereby sealing the battery module 3 and the liquid cooling assembly inside the battery case. In this embodiment, a seal ring is disposed between the box body 1 and the box cover 2, and the seal ring is fixed by bolts. The two end plates 11 are respectively positioned at the front end and the rear end, and are opposite and parallel. A battery pack explosion-proof valve 141 is arranged on one end plate 11, and an electrical interface 142, a liquid inlet 143 and a liquid outlet 144 are arranged on the other end plate 11. The electrical interface 142 includes an output electrical interface, a data acquisition interface, and a liquid cooling control interface. The two side plates 12 are opposite and parallel. The two end beams 41 are arranged in the accommodating cavity 19 and are respectively positioned at the front end and the rear end, and the two ends are respectively connected with the side plates 12. The middle cross beam 42 is located in the middle of the containing cavity 19 and parallel to the end plate 11, and two ends of the middle cross beam are respectively connected with the side plates 12. The middle cross member 42 divides the accommodation chamber 19 into two sub accommodation chambers. The battery module 3 has a long structure, and two ends of the battery module face the side plates 12. And a low-voltage interface and a high-voltage interface are respectively arranged at two ends of the battery module 3. Wherein the high-voltage interface is the output electrode of the battery module. The low voltage interface is the voltage and temperature acquisition interface of electric core in the battery module 3. The low voltage interface of each battery module 3 is connected to the data acquisition interface of the electrical interface 142 via a data line. The output electrodes of the battery modules 3 are connected in series and then connected to the output electrical interface of the electrical interface 142.

The end beam 41 and the middle beam 42 are connected with the box body 1 by welding. Specifically, in the middle cross member 42, two ends of the middle cross member 42 are respectively connected to the side plates 12 and are welded to the side plates 12. Referring to fig. 4 and 5, the middle cross member 42 is composed of a cross member main body 421 and two end plates 422. The two end plates 422 are respectively disposed at two ends of the beam main body 421, and form an H-shaped structure with the beam main body 421, so that the middle beam 42 is in an H-shaped structure. The side plate 12 is an L-shaped structure including a vertical slat 121 and a horizontal slat 122. The vertical laths 121 and the horizontal laths 122 are fixedly connected and form an L-shaped structure. The horizontal slats 122 are disposed toward the inside of the cabinet 1. The bottom plate 13 is fixedly connected to the bottom surface of the horizontal strip 122, more specifically, by welding. Two ends of the middle cross beam 42 are respectively erected on the horizontal laths 122 and are connected with the horizontal laths 122 in a welding way; the end plates 422 at the two ends of the middle cross beam 42 are tightly attached to the inner sides of the vertical strips 121 and are connected with the vertical strips 121 in a welding mode. In addition, the inner side edge of the horizontal slat 122 is provided with a plurality of bolt mounting blocks 15. The bolt mounting block 15 is used for being fixedly connected with the battery module 3. Specifically, the two ends of the battery module 3 are mounted on the horizontal laths 122 of the side plates 12 by bolts provided between the module end plates and the bolt mounting blocks 15. On one hand, the presence of the horizontal strips 122 increases the area of the bonding surface of the side plates 12 to the bottom plate 13, thereby increasing the physical strength of the side plates 12 after welding to the bottom plate 13. On the other hand, the thickness of the horizontal strip 122 is larger than that of the bottom plate 13, in this embodiment, the thickness of the bottom plate 13 is 2.0mm, the thickness of the horizontal strip 122 is 4.0mm, and the horizontal strip 122 and the vertical strip 121 are integrally formed into a profile, and the physical strength of the horizontal strip 122 is higher than that of the bottom plate 13. From this, the physical strength of box 1 self structure has been strengthened greatly to the physical strength that battery module 3 and box 1 are connected has been strengthened greatly, the intensity of the anti collision impact of curb plate 12 has been strengthened greatly simultaneously. In addition, the end plate 11 may also be an L-shaped plate with a similar structure to the side plate 12, so as to enhance the connection strength between the end plate 11 and the bottom plate 13, the physical strength of the whole case, and the strength of the end plate 11 against collision and impact.

The liquid cooling assembly includes a liquid cooling plate 51, a liquid inlet pipe 52, a liquid outlet pipe 53, and a thermal pad 54. The thermal pad 54 is disposed on the base plate 13 proximate to the base plate 13. The insulating pad 54 is typically made of a foam material and is attached to the base plate 13 by structural adhesive. The liquid cooling plate 51 is disposed on the insulating pad 54 and under the battery module 3. The liquid cooling plate 51 is connected to the liquid inlet pipe 52 and the liquid outlet pipe 53 through a control valve. The liquid inlet pipe 52 and the liquid outlet pipe 53 are connected to the liquid inlet 143 and the liquid outlet 144, respectively. The control valve is connected to a liquid-cooled control interface in the electrical interface 142. Liquid inlet pipe 52 and liquid outlet pipe 53 are disposed closely adjacent the inside of side plate 12.

In addition, the liquid inlet pipe 52 and the liquid outlet pipe 53 are convenient to route, the high-voltage interface of the low-voltage interface of the battery module 3 is convenient to route, and the control valve is convenient to route. The middle cross member 42 is provided at both ends thereof with stepped grooves 423. A certain distance is provided between the inner side of the vertical strips 121 and the end surfaces of the battery modules 3, whereby a pipe passage 191 having a through front-rear end is formed between the inner side of the vertical strips 121 and the end surfaces of the battery modules 3 and above the stepped groove 423. Therefore, the liquid inlet pipe 52 and the liquid outlet pipe 53, the high-voltage interface wiring of the low-voltage interface of the battery module 3 and the control valve wiring can be wired through the pipeline channel 191.

In addition, the top of the battery module 3 of the present embodiment is provided with an explosion opening hole 31. The battery core inside the battery module 3 is provided with a corresponding explosion-proof valve at the position of the explosion hole 31. Thus, when the internal pressure of the battery cell of the battery module 3 is too high, heat can be released upwards through the explosion-proof valve and the explosion-proof hole 31. In order to make the battery module 3 have a space for heat release, a top gap 192 is provided between the top of the battery module 3 and the case cover 2. Which inevitably results in insufficient strength of the intermediate support of the lid. For this purpose, in the present embodiment, a plurality of cover support posts 429 are disposed on the middle cross member 42. The cover support posts 429 rest against the underside of the cover 2 and provide support for the cover 2.

In addition, the length of the battery module 3 of the present embodiment is usually 1200mm to 2500mm, so the length is long. For this reason, in the present embodiment, the battery module 3 is further provided with a module pressing bar 43. The module hold-down bar 43 is parallel to the side plates 12 and is located in the middle of the two side plates 12. The module pressing bars 43 cross the respective battery modules 3 and press the respective battery modules 3. Two ends and the middle of the module pressing bar 43 are fixedly connected with the two end cross beams 41 and the middle cross beam 42 in a bolt fixing mode respectively.

In the present embodiment, the side plate 12 is further provided with mounting wings 18 on the outer side thereof. The mounting wings 18 are used to secure the battery pack to the vehicle.

In addition, it should be noted that in the present embodiment, there is one middle cross beam 42. Those skilled in the art will appreciate that two or three cross beams 42 may be provided.

Fig. 6 shows an automobile in which a battery pack 901 is provided. The battery pack 901 is the battery pack in the above embodiment. Specifically, the battery pack 901 is provided in the automobile, both ends of the battery pack 901 face the same direction as the automobile traveling direction R, that is, the side plate 12 is parallel to the automobile traveling direction R, and the end plate 11, the end cross member 41, and the middle cross member 42 are perpendicular to the automobile traveling direction R.

Claims

1. A battery box comprises a box body (1); the box body (1) comprises two end plates (11), two side plates (12) and a bottom plate (13); the two end plates (11), the two side plates (12) and the bottom plate (13) enclose an accommodating cavity (19) with an opening at the top end; the two end plates (11) are respectively positioned at the front end and the rear end and are opposite and parallel; the two side plates (12) are opposite and parallel; the device is characterized by also comprising two end cross beams (41) and at least one middle cross beam (42) which are arranged in the accommodating cavity (19); two end beams (41) are respectively positioned at the front end and the rear end and are parallel to the end plate (11), and the two ends are respectively connected with the side plate (12); well crossbeam (42) are located and hold chamber (19) middle part, are on a parallel with end plate (11), and curb plate (12) are connected respectively at both ends to will hold chamber (19) and cut apart into a plurality of subs and hold the chamber.

2. The battery box according to claim 1, characterized in that the side plates (12) comprise vertical slats (121) and horizontal slats (122); the vertical lath (121) and the horizontal lath (122) are fixedly connected and form an L-shaped structure; the horizontal lath (122) is arranged towards the interior of the box body (1); the bottom plate (13) is fixedly connected with the bottom surface of the horizontal lath (122); two ends of the middle cross beam (42) are respectively erected on the horizontal laths (122); two ends of the middle cross beam (42) are respectively provided with a butt joint plate (421), so that the middle cross beam (42) is in an H-shaped structure; the end plate (421) is fixedly connected with the vertical lath (121).

3. The battery box according to claim 2, characterized in that the horizontal strips (122) are provided with a plurality of bolt mounting blocks (15).

4. A battery box according to claim 1, 2 or 3, characterized by further comprising a box cover (2); the box cover (2) is used for covering the top of the box body (1) and sealing the accommodating cavity (19); a plurality of cover body support columns (429) are arranged on the middle cross beam (42); when the box cover (2) is covered on the top of the box body (1), the cover body support column (429) is pressed against the lower part of the box cover (2) and provides support for the box cover (2).

5. A battery pack characterized by comprising a battery box according to claim 3 and a plurality of battery modules (3) disposed in the battery box accommodating chamber (19); the battery module (3) is in a strip shape, the strip direction of the battery module is parallel to the end plate (11), and two ends of the battery module are fixedly connected with the bolt mounting block (15).

6. The battery pack according to claim 5, wherein stepped grooves (423) are provided at both ends of the middle cross member (42); and a pipeline channel (191) with a through front end and a through rear end is formed between the inner side of the vertical strip plate (121) and the end surface of the battery module (3) and above the stepped groove (423).

7. The battery pack according to claim 5, further comprising a liquid-cooling plate (51) and a heat-insulating pad (54); the heat insulation pad (54) is arranged on the bottom plate (13) and clings to the bottom plate (13); the liquid cooling plate (51) is arranged on the heat insulation pad (54) and is positioned below the battery module (3).

8. The battery pack according to claim 5, further comprising module pressing bars (43); the module pressing bar (43) is parallel to the side plate (12) and presses and holds the battery module (3); two ends and the middle of the module pressing bar (43) are respectively and fixedly connected with the two end cross beams (41) and the middle cross beam (42).

9. The battery pack according to claim 5, wherein the battery case further comprises a case cover (2); the box cover (2) is used for covering the top of the box body (1) and sealing the accommodating cavity (19); a plurality of cover body support columns (429) are arranged on the middle cross beam (42); when the box cover (2) is covered on the top of the box body (1), the cover body support column (429) is pressed against the lower part of the box cover (2) and provides support for the box cover (2).

10. A motor vehicle, characterized in that the motor vehicle is provided with a battery pack according to any one of claims 5 to 9, the centre cross member (42) of which battery pack is perpendicular to the direction of travel of the motor vehicle.