CN213150902U

CN213150902U - Battery box and power battery

Info

Publication number: CN213150902U
Application number: CN202021651269.3U
Authority: CN
Inventors: 邹富启
Original assignee: Shanghai Cenat New Energy Co Ltd
Current assignee: Shanghai Cenat New Energy Co Ltd
Priority date: 2020-08-10
Filing date: 2020-08-10
Publication date: 2021-05-07
Anticipated expiration: 2030-08-10

Abstract

The utility model relates to the technical field of power batteries, and provides a battery box and a power battery, the battery box comprises a first fastener, a box body with a first connecting part and a cover body with a second connecting part, the battery box also comprises a connecting reinforcement part, the first connecting part is provided with a combining groove, the connecting reinforcement part is in interference fit with the combining groove, the first connecting part is provided with a first connecting hole, the second connecting part is provided with a second connecting hole, the connecting reinforcement part is provided with a third connecting hole, the first fastener is connected in the third connecting hole after passing through the first connecting hole and the second connecting hole in sequence, the battery box not only can effectively increase the connection strength of the connection part of the battery box by only replacing the high-strength material for the connection part, meanwhile, the battery box can be effectively prevented from being over designed, the quality of the battery box is controlled to the maximum extent, and the production cost of the battery box is reduced.

Description

Battery box and power battery

Technical Field

The utility model relates to a power battery technical field especially provides a battery box and power battery.

Background

At present, with the rapid development of new energy automobiles, the requirements of the new energy automobile industry on automobile lightweight are higher and higher. The weight of the power battery, which is an important component of a new energy vehicle, is relatively large in the overall weight of the new energy vehicle, and in order to reduce the weight of the power battery, the battery box of the power battery is usually made of a light material such as an aluminum alloy, however, because the strength of the light material is relatively small, and stress applied to each connection point of the battery box is relatively concentrated, the connection failure of the battery box is easily caused.

At present, in order to solve the problem of connection failure of a battery box, part of automobile manufacturers can adopt materials with higher strength as the battery box of the power battery, but the solution has the problem of over design, so that the weight of the power battery can be greatly increased, the requirement on light weight of a new energy automobile is not met, and the production cost of the power battery can be greatly increased; some automobile manufacturers may weld the connection points of the battery box, but the heat treatment may cause the material performance of the battery box to be reduced, and the risk of connection failure of the battery box is further increased.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a battery box and power battery aims at solving current power battery's battery box and takes place to connect the technical problem who became invalid easily.

In order to achieve the above object, the utility model adopts the following technical scheme: the utility model provides a battery box, including first fastener, the lid that has the box of first connecting portion and have the second connecting portion, battery box is still including connecting the reinforcement, has seted up the combination groove on the first connecting portion, it interference fit combines the inslot to connect the reinforcement, first connecting hole has been seted up to first connecting portion, the second connecting hole has been seted up to the second connecting portion, it has seted up the third connecting hole to connect the reinforcement, first fastener passes first connecting hole and second connecting hole in proper order and connects in the third connecting hole after.

The embodiment of the utility model provides a battery box has following beneficial effect at least: the connection reinforcing piece is combined with the first connecting part of the box body, so that high-strength materials are replaced only at the connecting part of the battery box, the connecting strength of the connecting part between the box body and the cover body can be effectively increased, the battery box can be effectively prevented from being over designed, the quality of the battery box is controlled to the maximum extent, and the production cost of the battery box is reduced; in addition, through will connecting in the reinforcement interference fit combines the inslot of first connecting portion, realize with the first connecting portion inseparable combination that cold processing means will connect reinforcement and box, effectively prevent the material performance of box and descend to the joint strength of the joint part of further increase battery box takes place to connect the risk of failing with the reduction battery box.

In one embodiment, the opposite ends of the connection reinforcing member are provided with first wedge-shaped portions, the opposite groove walls of the combination groove of the first connection portion are provided with first wedge-shaped grooves, and each first wedge-shaped portion is in interference fit with the corresponding first wedge-shaped groove;

or, two relative cell walls in the combination groove of first connecting portion all are equipped with second wedge portion, and the second wedge groove has all been seted up at the relative both ends of connecting the reinforcement, and each second wedge portion interference fit is in the second wedge inslot that corresponds.

Through adopting above-mentioned technical scheme, be more convenient for put into the combination inslot of first connecting portion the reinforcement will be connected, can ensure simultaneously to connect reinforcement and first connecting portion can the in close connection.

In one embodiment, the cross section of the connection reinforcing member and the cross section of the combination groove of the first connection portion are wedge-shaped structures.

In one embodiment, the first protrusion is in a ring structure, and the inner aperture of the first protrusion gradually decreases toward the first connection hole to form the guide opening.

Through adopting above-mentioned technical scheme, first fastener gets into in the first connecting hole along the direction of direction mouth, makes the operation of being connected of lid and box become more convenient.

In one embodiment, the battery box further includes a sealing member disposed between the box body and the cover body, the sealing member is provided with a first positioning hole, the first connecting portion is provided with a first protruding portion disposed along an edge of the first connecting hole, and the first protruding portion abuts against the cover body after passing through the first positioning hole.

Through adopting above-mentioned technical scheme, effectively promote the sealing performance of above-mentioned battery box, pass first locating hole back through first convex part simultaneously and lid looks butt, realize lid and box rigid contact on aforementioned connection position, effectively guarantee the joint torque between lid and the box, further ensure the joint strength of the tie point between lid and the box, reduce the risk that takes place to be connected between lid and the box more effectively.

In one embodiment, the battery box further comprises a second fastening member, the first connecting portion further defines a fourth connecting hole, the second connecting portion further defines a fifth connecting hole, the connection reinforcing member further defines a sixth connecting hole, and the second fastening member sequentially passes through the fourth connecting hole, the fifth connecting hole and the sixth connecting hole and then is connected to the external base.

Through adopting above-mentioned technical scheme, under the high strength supporting action of connecting the reinforcement, effectively improve the joint strength of the tie point between above-mentioned battery box and the outside base member to further reduce the risk that above-mentioned battery box takes place to connect inefficacy.

In one embodiment, the battery box further includes a sealing member disposed between the box body and the cover body, the sealing member is provided with a second positioning hole, the connection reinforcement member is provided with a second protrusion disposed along an edge of the sixth connection hole, and the second protrusion sequentially penetrates through the fourth connection hole of the first connection portion and the second positioning hole of the sealing member and abuts against the cover body.

Through adopting above-mentioned technical scheme, effectively promote the sealing performance of above-mentioned battery box, pass the fourth connecting hole of first connecting portion and the second locating hole of sealing member back through the second convex part simultaneously and the lid looks butt, realize the rigid contact of lid and box on aforementioned connection position, effectively guarantee the connecting torque between lid and the box, further ensure the joint strength of the tie point between lid, box and the outside base member three to further reduce the risk that takes place to be connected between above-mentioned battery box and the outside base member and became invalid.

In one embodiment, a part of hole walls of the fourth connecting holes of the first connecting portion are communicated with the outside to form avoiding openings.

Through adopting above-mentioned technical scheme, the second convex part of connecting the reinforcement can be followed this fourth connecting hole of dodging mouthful entering first connecting portion, makes the assembly operation of box and connection reinforcement become more convenient.

In one embodiment, the cover body is provided with a reinforcing sleeve, the reinforcing sleeve comprises a supporting portion and an abutting portion, the second fastener penetrates through the reinforcing sleeve, one end, far away from the connection reinforcing piece, of the second fastener abuts against the supporting portion, the supporting portion abuts against one side, far away from the first connecting portion, of the second connecting portion, and the abutting portion penetrates through the fifth connecting hole of the second connecting portion and then abuts against the second convex portion.

Through adopting above-mentioned technical scheme, second fastener, reinforcement sleeve and the second convex part of connecting the reinforcement are rigidity contact in proper order, further improve the joint strength of the tie point between above-mentioned battery box and the outside base member to further reduce the risk that takes place to connect between above-mentioned battery box and the outside base member and become invalid.

In order to achieve the above object, the utility model also provides a power battery, including above-mentioned battery box.

Since the power battery adopts all the embodiments of the battery box, at least all the advantages of the embodiments are achieved, and detailed description is omitted.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.

Fig. 1 is a schematic structural diagram of a battery box according to an embodiment of the present invention;

fig. 2 is an exploded view of the battery case shown in fig. 1;

fig. 3 is a schematic view showing an assembled structure of a case and a connection reinforcement in the battery case shown in fig. 1;

FIG. 4 is a sectional view taken along A-A of the assembled structure of the case and the connection reinforcing member shown in FIG. 3;

fig. 5 is a schematic view of an assembly structure of a box body and a connection reinforcement in a battery box according to another embodiment of the present invention;

fig. 6 is a sectional view taken along line B-B of the assembled structure of the case and the connection reinforcing member shown in fig. 5.

Wherein, in the figures, the respective reference numerals:

10. the battery box, 11, box body, 111, first connecting portion, 1111, combination groove, 1112, first wedge groove, 1113, first protrusion, 1114, fourth connecting hole, 12, connection reinforcement, 121, first wedge portion, 122, third connecting hole, 123, second protrusion, 13, lid, 131, second connecting portion, 1311, second connecting hole, 1312, fifth connecting hole, 132, reinforcement sleeve, 1321, support portion, 1322, abutting portion, 14, first fastener, 15, sealing member, 151, first positioning hole, 152, second positioning hole, 16, second fastener.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

Furthermore, the terms "first", "second", "third", "fourth", "fifth", "sixth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", "third", "fourth", "fifth", "sixth" may explicitly or implicitly include one or more of the features. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Example one

Referring to fig. 1 to 4, a battery box 10 includes a first fastening member 14, such as a bolt, a screw, and a connection reinforcement 12, a box 11 having a first connection portion 111, and a cover 13 having a second connection portion 131, wherein the first connection portion 111 has a connection groove 1111, the connection reinforcement 12 is in interference fit with the connection groove 1111, the first connection portion 111 has a first connection hole, the second connection portion 131 has a second connection hole 1311, the connection reinforcement 12 has a third connection hole 122, and the first fastening member 14 sequentially passes through the first connection hole and the second connection hole 1311 and then is connected to the third connection hole 122.

In the battery box 10, the connection reinforcing member 12 is combined with the first connection part 111 of the box body 11, so that high-strength materials are replaced only at the connection part of the box body 11 and the cover body 13, the connection strength of the connection part of the battery box 10 can be effectively increased, excessive design of the battery box 10 can be effectively avoided, the quality of the battery box 10 can be controlled to the maximum extent, and the production cost of the battery box 10 can be reduced; in addition, the connection reinforcing member 12 is tightly combined with the first connection part 111 of the case 11 by a cold treatment means by interference-fitting the connection reinforcing member 12 into the combination groove 1111 of the first connection part 111, so that the material performance of the case 11 is effectively prevented from being reduced, the connection strength of the connection part of the battery case 10 is further increased, and the risk of connection failure of the battery case 10 is reduced.

Specifically, the case 11 is made of aluminum alloy, and the connection reinforcement 12 is made of high-strength steel.

In this embodiment, please refer to fig. 3 and 4, the opposite ends of the connection reinforcement 12 are respectively provided with a first wedge-shaped portion 121, the opposite groove walls of the connection groove 1111 of the first connection portion 111 are respectively provided with a first wedge-shaped groove 1112, and each first wedge-shaped portion 121 is in interference fit with the corresponding first wedge-shaped groove 1112; or, two opposite groove walls of the combination groove 1111 of the first connection portion 111 are provided with second wedge-shaped portions, the two opposite ends of the connection reinforcement 12 are provided with second wedge-shaped grooves, and the second wedge-shaped portions are in interference fit with the corresponding second wedge-shaped grooves. By adopting the above technical scheme, it is more convenient to put into the combination groove 1111 of the first connection portion 111 the connection reinforcement 12, and at the same time, it can be ensured that the connection reinforcement 12 and the first connection portion 111 can be tightly combined.

Specifically, the included angle formed by the two opposite inclined surfaces of the first wedge-shaped portion 121 is slightly larger than the included angle formed by the two opposite inclined groove walls of the first wedge-shaped groove 1112 of the first connection portion 111, when the connection reinforcement 12 is assembled with the first connection portion 111 of the box 11, the connection reinforcement 12 is inserted into the coupling groove 1111 of the first connection portion 111, and simultaneously the two first wedge-shaped portions 121 of the connection reinforcement 12 are correspondingly inserted into the two first wedge-shaped grooves 1112 of the first connection portion 111, when each first wedge-shaped portion 121 interferes with the groove wall of the corresponding first wedge-shaped groove 1112, the connection reinforcement 12 is knocked to make the two first wedge-shaped portions 121 of the first connection portion 111 respectively extrude the groove walls of the corresponding first wedge-shaped grooves 1112, at this time, the groove walls of the first wedge-shaped grooves 1112 deform slightly until the connection reinforcement 12 is completely placed into the coupling groove 1111, that is to realize that the connection reinforcement 12 is tightly coupled with the first connection portion 111 of the box 11 by means of cold treatment, the material performance of the case body 11 is effectively prevented from being reduced, so that the connection strength of the connection part of the battery case 10 is further increased, and the risk of connection failure of the battery case 10 is reduced.

For another embodiment, the operation principle of the interference fit of the second wedge portion of the first connection portion 111 to the second wedge groove of the connection reinforcement 12 is substantially the same as the aforementioned operation principle, and is not described in detail herein.

In this embodiment, please refer to fig. 1 and fig. 2, the battery box 10 further includes a sealing member 15 disposed between the box body 11 and the cover 13, the sealing member 15 is provided with a first positioning hole 151, the first connecting portion 111 is provided with a first protrusion 1113 disposed along an edge of the first connecting hole, and the first protrusion 1113 abuts against the cover 13 after passing through the first positioning hole 151. The sealing performance of the battery box 10 is effectively improved by arranging the sealing element 15 between the box body 11 and the cover body 13, and in addition, because the sealing element 15 is made of a flexible material, the rigid contact of the cover body 13 and the box body 11 on the connecting part is realized by the first protrusion 1113 penetrating through the first positioning hole 151 and then abutting against the cover body 13, the connecting torque between the cover body 13 and the box body 11 is effectively ensured, the connecting strength of the connecting point between the cover body 13 and the box body 11 is further ensured, and the risk of connection failure between the cover body 13 and the box body 11 is more effectively reduced.

Of course, the kind of the sealing member 15 includes various kinds, such as foam, rubber pad, etc., and is not particularly limited herein.

Specifically, as shown in fig. 1 and fig. 2, the first protrusion 1113 is in a ring structure, the inner diameter of the first protrusion 1113 gradually decreases toward the first connection hole to form a guide opening, and the first fastening member 14 enters the first connection hole along the guide opening, so that the connection operation between the cover 13 and the box 11 is more convenient.

Specifically, as shown in fig. 1 and fig. 2, the battery box 10 further includes a second fastening member 16, such as a bolt, a screw, etc., the first connecting portion 111 further defines a fourth connecting hole 1114, the second connecting portion 131 further defines a fifth connecting hole 1312, the connection reinforcing member 12 further defines a sixth connecting hole, and the second fastening member 16 is connected to an external base body after passing through the fourth connecting hole 1114, the fifth connecting hole 1312 and the sixth connecting hole in sequence, wherein the external base body can be understood as a vehicle body of an automobile. By adopting the above technical scheme, under the high-strength supporting action of the connection reinforcing member 12, the connection strength of the connection point between the battery box 10 and the external base body is effectively improved, so that the risk of connection failure of the battery box 10 is further reduced.

Specifically, as shown in fig. 1 and fig. 2, the sealing member 15 is further provided with a second positioning hole 152, the connection reinforcing member 12 is provided with a second protrusion 123 arranged along an edge of the sixth connecting hole, and the second protrusion 123 sequentially passes through the fourth connecting hole 1114 of the first connecting portion 111 and the second positioning hole 152 of the sealing member 15 and then abuts against the cover 13. Because the sealing member 15 is made of a flexible material, the second protrusion 123 is abutted against the lid 13 after passing through the fourth connection hole 1114 of the first connection portion 111 and the second positioning hole 152 of the sealing member 15, so that the lid 13 is rigidly contacted with the case 11 at the connection position, the connection torque between the lid 13 and the case 11 is effectively ensured, the connection strength of the connection points among the lid 13, the case 11 and the external base is further ensured, and the risk of connection failure between the battery case 10 and the external base is further reduced.

Specifically, as shown in fig. 1 and fig. 2, a portion of the hole wall of the fourth connecting hole 1114 of the first connecting portion 111 is communicated with the outside to form an avoiding opening. When the connection reinforcement 12 is assembled with the first connection portion 111 of the case 11, the second protrusion 123 of the connection reinforcement 12 enters the fourth connection hole 1114 of the first connection portion 111 from the escape opening, so that the assembling operation of the case 11 with the connection reinforcement 12 becomes more convenient.

Specifically, the width of the avoiding opening is gradually reduced from the outside to the direction of the fourth connecting hole 1114 of the first connecting portion 111, so that the second protrusion 123 connected to the reinforcing member 12 can be smoothly placed into the fourth connecting hole 1114 of the first connecting portion 111, and the assembling convenience of the box body 11 and the connecting reinforcing member 12 can be further improved.

Specifically, as shown in fig. 1 and fig. 2, the cover 13 is provided with the reinforcing sleeve 132, the reinforcing sleeve 132 includes a supporting portion 1321 and an abutting portion 1322, the second fastening member 16 passes through the reinforcing sleeve 132, one end of the second fastening member 16 away from the connection reinforcing member 12 abuts against the supporting portion 1321, the supporting portion 1321 abuts against one side of the second connecting portion 131 departing from the first connecting portion 111, and the abutting portion 1322 passes through the fifth connecting hole 1312 of the second connecting portion 131 and abuts against the second protrusion 123. After the second fastening member 16 is fastened to the external substrate, the second fastening member 16, the reinforcing sleeve 132 and the second protrusion 123 of the connection reinforcing member 12 are in rigid contact with each other in sequence, so that the connection strength of the connection point between the battery case 10 and the external substrate is further improved, and the risk of connection failure between the battery case 10 and the external substrate is further reduced.

Example two

The present embodiment is different from the first embodiment in the assembling structure of the first connecting portion 111 connecting the reinforcing member 12 and the case 11.

In this embodiment, as shown in fig. 5 and 6, the cross section of the connection reinforcing member 12 and the cross section of the coupling groove 1111 of the first connection portion 111 both have a wedge-shaped structure. By adopting the above technical scheme, it is more convenient to put into the combination groove 1111 of the first connection portion 111 the connection reinforcement 12, and at the same time, it can be ensured that the connection reinforcement 12 and the first connection portion 111 can be tightly combined.

Specifically, the included angle formed by the two opposite inclined surfaces of the connection reinforcing member 12 is slightly larger than the included angle formed by the two opposite inclined groove walls of the coupling groove 1111 of the first connecting portion 111, when the connection reinforcing member 12 is assembled with the first connecting portion 111 of the case 11, the connection reinforcing member 12 is inserted into the coupling groove 1111 of the first connecting portion 111, when the connection reinforcing member 12 interferes with the groove walls of the coupling groove 1111, the connection reinforcing member 12 is pressed against the groove walls of the coupling groove 1111 in a knocking manner, at this time, the groove walls of the coupling groove 1111 will be slightly deformed until the connection reinforcing member 12 is completely inserted into the coupling groove 1111, that is, the connection reinforcing member 12 is tightly coupled with the first connecting portion 111 of the case 11 by a cold treatment means, thereby effectively preventing the material performance of the case 11 from being reduced, and further increasing the connection strength of the connection portion of the battery case 10, to reduce the risk of connection failure of the battery box 10.

In order to achieve the above object, the present invention further provides a power battery, which includes the above battery box 10.

Since the power battery adopts all the embodiments of the battery box 10, at least all the advantages of the embodiments are achieved, and no further description is given here.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a battery box, includes first fastener, has the box of first connecting portion and the lid that has the second connecting portion, its characterized in that: the battery box is characterized by further comprising a connection reinforcing piece, a combination groove is formed in the first connecting portion, the connection reinforcing piece is in interference fit with the combination groove, a first connecting hole is formed in the first connecting portion, a second connecting hole is formed in the second connecting portion, a third connecting hole is formed in the connection reinforcing piece, and the first fastener sequentially penetrates through the first connecting hole and the second connecting hole and then is connected into the third connecting hole.

2. The battery box according to claim 1, characterized in that: the opposite ends of the connection reinforcing part are respectively provided with a first wedge-shaped part, the opposite groove walls of the combination groove of the first connection part are respectively provided with a first wedge-shaped groove, and each first wedge-shaped part is in interference fit with the corresponding first wedge-shaped groove;

or, first connecting portion the two relative cell walls in combination groove all are equipped with second wedge portion, the second wedge groove has all been seted up at the relative both ends of connecting the reinforcement, each second wedge portion interference fit corresponds in the second wedge inslot.

3. The battery box according to claim 1, characterized in that: the cross section of the connection reinforcing part and the cross section of the combination groove of the first connection part are both wedge-shaped structures.

4. A battery box according to any one of claims 1-3, characterized in that: the battery box is characterized by further comprising a sealing element arranged between the box body and the cover body, a first positioning hole is formed in the sealing element, a first convex portion is arranged on the first connecting portion and is arranged along the edge of the first connecting hole, and the first convex portion penetrates through the first positioning hole and then is abutted to the cover body.

5. The battery box according to claim 4, characterized in that: the first convex part is of an annular structure, and the inner aperture of the first convex part gradually decreases towards the first connecting hole to form a guide port.

6. A battery box according to any one of claims 1-3, characterized in that: the battery box further comprises a second fastener, a fourth connecting hole is formed in the first connecting portion, a fifth connecting hole is formed in the second connecting portion, a sixth connecting hole is formed in the connection reinforcing piece, and the second fastener penetrates through the fourth connecting hole, the fifth connecting hole and the sixth connecting hole in sequence and then is connected with an external base body.

7. The battery box according to claim 6, characterized in that: the battery box further comprises a sealing element arranged between the box body and the cover body, a second positioning hole is formed in the sealing element, a second convex portion is arranged along the edge of the sixth connecting hole and penetrates through the fourth connecting hole of the first connecting portion and the second positioning hole of the sealing element in sequence and then is abutted to the cover body.

8. The battery box according to claim 7, characterized in that: and part of hole walls of the fourth connecting holes of the first connecting part are communicated with the outside to form avoiding openings.

9. The battery box according to claim 7, characterized in that: the cover body is provided with a reinforcing sleeve, the reinforcing sleeve comprises a supporting portion and an abutting portion, the second fastener penetrates through the reinforcing sleeve, one end, far away from the connecting reinforcing piece, of the second fastener abuts against the supporting portion, the supporting portion abuts against one side, far away from the first connecting portion, of the second connecting portion, and the abutting portion penetrates through the fifth connecting hole of the second connecting portion and then abuts against the second protruding portion.

10. A power battery, characterized by: comprising a battery compartment according to any of claims 1-9.