CN220856802U - Battery pack case lid and battery pack - Google Patents

Abstract

The utility model discloses a battery pack case cover and a battery pack. The battery pack case cover comprises a cover body which is used for being matched with the case body of the battery pack; and the restraining part is arranged on the cover body, protrudes towards the direction of the battery core in the battery pack and is used for being abutted with the battery core. The battery pack comprises the battery pack case cover; a case; the battery cell comprises a plurality of battery cells, wherein one end of each battery cell is assembled in the box body, and the restraint part is abutted with the other end of each battery cell. In the utility model, the restraint part formed by the box body and the two ends of the battery cell of the box body are used for limiting, so that the displacement of the battery cell in the height direction is limited, and the limitation of the battery cell is realized.

Description

Battery pack case lid and battery pack

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery pack cover and a battery pack.

Background

At the moment of rapid development of battery and grouping technology innovation, CTP (cell to pack) design is gradually one of the mainstream grouping technologies with the advantages of high energy density, high volume ratio, low cost and the like. Because the cell is free of the constraint of the end plate, the side plate and the steel belt in the CTP battery pack, the overall stability of the CTP battery pack is poorer than that of the traditional module. The vibration in the direction of Bao Yangao degrees of the battery is the most common working condition in the running process of the whole vehicle, if the battery pack has no reliable limit on the battery core in the direction, the battery core can not avoid displacement during vibration, and even the battery core can be in contact with other metal parts to cause short circuit during severe explosion. Therefore, the limit of the cell module in the height direction is particularly important in the CTP cell package.

In the prior art, structural members are often designed separately between the battery cell and the outer envelope, but the added structural members result in increased cost of the battery pack. In addition, in order to maintain the strength of the structural member, a more complex reinforcing structure is required to be designed, which is contrary to the CTP design concept with low cost and high integration, and the newly added structural member needs more limit designs to be fixed, and is easy to generate alternating pressure, so that the electric core is directly unstable in stress and has potential safety hazard

Disclosure of utility model

In order to overcome at least one of the defects described in the prior art, the utility model provides a battery pack case cover which can limit the displacement of a battery cell in a battery pack and has high structural stability.

According to an embodiment of the utility model, a battery pack case cover includes: the cover body is used for being matched with the box body of the battery pack; and the restraining part is arranged on the cover body, protrudes towards the direction of the battery core in the battery pack and is used for being abutted with the battery core.

In this battery package case lid, through be provided with on the lid to the bellied restraint of electric core direction in the battery package, so that restraint is in the lid with the box cooperation of battery package can with electric core butt in the battery package, and then restriction the displacement of electric core is in order to realize to the spacing of electric core.

According to some embodiments of the utility model, the restraining part is a protruding structure formed by the cover body, and a first pressing strip is arranged in the protruding structure.

Based on the same inventive concept, the utility model also provides a battery pack, comprising: the battery pack case cover as described above; a case; the battery cells are assembled at one end of each battery cell along the first direction in the box body, and the constraint part is abutted with the other end of each battery cell along the first direction.

In this battery package, through will the electric core is in along first direction's one end assembly the box, by the lid forms restraint portion with the electric core is along the other end butt in first direction, just restraint portion with the box cooperation of battery package, so that restraint portion with the box is along the first direction of electric core forms firm whole, wherein the electric core sets up restraint portion with between the box, namely through the box with the case lid can be to carrying out spacing along first direction to the electric core to be provided with first layering in the restraint portion, can promote the intensity of restraint portion, in order to carry out effectual spacing to the electric core, can avoid the electric core receives external influence to take place the displacement along first direction.

According to some embodiments of the utility model, a first buffer is disposed between the constraining portion and the cell.

According to some embodiments of the utility model, the battery pack further comprises a longitudinal beam and a transverse beam, wherein the longitudinal beam and the transverse beam are fixedly connected inside the box body and divide the interior of the box body into a plurality of accommodating cavities, and the battery cells are assembled in the accommodating cavities.

According to some embodiments of the utility model, the restraint part is connected with the longitudinal beam in a matching way, and two ends of the restraint part along the width direction of the longitudinal beam are respectively abutted with the electric cores positioned at two sides of the longitudinal beam, wherein the electric cores are arranged in the accommodating cavity along the length direction of the longitudinal beam.

According to some embodiments of the utility model, the longitudinal beam extends towards the restraint to form an extension, and the extension is connected with the restraint in a matching way.

According to some embodiments of the utility model, a limiting part is formed on the cover body and is connected with the beam in a matching way, and a second buffer piece is arranged between the limiting part and the beam.

According to some embodiments of the utility model, the first bead is disposed within the stop portion.

According to some embodiments of the utility model, a sealing part which is connected with the box body in a matching way is formed at the edge of the cover body, and a sealing piece is connected between the sealing part and the box body.

In summary, the battery pack case cover and the battery pack provided by the utility model have the following technical effects:

1) The limiting part protruding towards the direction of the battery cell in the battery pack is arranged on the cover body, so that the limiting part can be abutted with the battery cell in the battery pack when the cover body is matched with the box body of the battery pack, and further the displacement of the battery cell is limited, and the limit of the battery cell is realized;

2) Through will the electric core is in along the one end assembly of first direction the box, by the lid forms restraint portion with the electric core is along the other end butt in the first direction, just restraint portion with the box cooperation of battery package, so that restraint portion with the box is along the first direction of electric core forms firm whole, wherein the electric core sets up restraint portion with between the box, namely through the box with the case lid can be right the electric core carries out spacing along the first direction, and be provided with first layering in the restraint portion, can promote the intensity of restraint portion, with carry out effectual spacing to the electric core, can avoid the electric core receives external influence to take place along the displacement of first direction.

Drawings

Fig. 1 is a schematic view of a battery pack according to an embodiment of the present utility model;

fig. 2 is a schematic structural view of a battery pack case cover according to an embodiment of the present utility model;

FIG. 3 is a schematic view of a constraint part according to an embodiment of the present utility model;

fig. 4 is a schematic structural view of a limiting portion according to an embodiment of the present utility model.

Wherein the reference numerals have the following meanings:

1. a cover body; 11. a restraining section; 12. a first batten; 13. a first buffer member; 14. a limit part; 15. a second buffer member; 16. a second pressing bar; 17. a sealing part; 18. a seal; 2. a case; 21. a longitudinal beam; 22. a cross beam; 23. an extension; 24. a receiving chamber; 3. and a battery cell.

Detailed Description

For a better understanding and implementation, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model.

In the description of the present utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, only for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements to be referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.

Referring to fig. 1 and 2, the present utility model discloses a battery pack case cover. The battery pack case cover comprises a cover body 1 and a restraint 11, and in some embodiments, the cover body 1 is used for matching with the case body 2 of the battery pack; the restraining part 11 is disposed on the cover 1, and the restraining part 11 protrudes toward the cell 3 in the battery pack and is used for abutting against the cell 3. In some embodiments, the restraining portion 11 protruding towards the direction of the battery cell 3 in the battery pack is arranged on the cover body 1, so that the restraining portion 11 can be abutted with the battery cell 3 in the battery pack when the cover body 1 is matched with the box body of the battery pack, and further the displacement of the battery cell 3 is limited, so that the limit of the battery cell 3 is achieved.

Referring to fig. 1, fig. 2, and fig. 3, in some embodiments, the constraint part 11 may be a protruding structure formed by the cover 1, optionally, the constraint part 11 is a protruding structure fixedly connected with the cover 1 by welding, bolting, fastening, or the like, so that the cover 1 and the constraint part 11 form a stable whole, and when the cover 1 is matched with the box of the battery pack, the protruding structure can abut against the battery cell 3 in the battery pack, thereby limiting displacement of the battery cell 3, so as to limit the battery cell 3, avoid assembling additional structural members, optimize the structure of the battery pack, reduce material cost, thoroughly eliminate the potential safety hazard that the assembly of additional structural members easily generates alternating stress, and cause unstable stress of the battery cell 3. Optionally, the protruding structure includes, but is not limited to, a single round shape, an elongated shape, a zigzag shape, or the like, and optionally, the protruding structure and the battery cells 3 in the battery pack may be in one-to-one mutual abutment, or one protruding structure and a plurality of the battery cells 3 in the battery pack are in mutual abutment, or a plurality of the protruding structures and one battery cell 3 in the battery pack are in mutual abutment; optionally, be provided with first layering 12 in the protruding structure, utilize first layering 12 promotes protruding mechanism's intensity for protruding structure's structural stability is higher, can be right the electric core carries out effectual spacing. Optionally, the first pressing strip 12 is disposed on a side of the protruding structure away from the battery cell 3, and optionally, the first pressing strip 12 may be disposed in the protruding structure by a connection manner such as bonding, bolting, welding, or the like. Optionally, the cover 1 may be made of plastic, metal or other synthetic materials, and optionally, the first pressing strip 12 may be made of plastic, metal or other synthetic materials.

Referring to fig. 1, in some embodiments, a battery pack includes a battery pack case cover, a case 2, and a plurality of battery cells 3 as described above, one end of the battery cell 3 in a first direction is assembled to the case 2, and the restraint portion 11 abuts against the other end of the battery cell 3 in the first direction. Optionally, one end of the battery cell 3 along the first direction is assembled on the case 2, the constraint part 11 formed by the cover 1 abuts against the other end of the battery cell 3 along the first direction, and the cover 1 is matched with the case 2 of the battery pack, so that the cover 1 and the case 2 form a stable whole, that is, the relative positions of the constraint part 11 and the case 2 in the first direction are fixed, wherein the battery cell 3 is arranged between the constraint part 11 and the case 2, that is, the case cover 2 and the case cover can limit the battery cell 3 along the first direction, optionally, the constraint part 11 is a protruding structure formed by the cover 1, and a first pressing strip 12 is arranged in the protruding structure, so that the strength of the constraint part 11 can be improved, the battery cell 3 can be effectively limited, and displacement of the battery cell 3 along the first direction due to external influence can be avoided; the first direction may be a height direction, a width direction, or a length direction of the battery cell 3. Optionally, a supporting structure such as a bottom guard plate or a liquid cooling plate may be disposed on a side of the case 2 away from the cover 1, for supporting the electrical core 3.

Referring to fig. 1 and 3, in some embodiments, a first buffer member 13 is disposed between the restraint portion 11 and the battery cell 3, and optionally, the first buffer member 13 may be a member with a buffer effect made of foam, silicone rubber, rubber pad or the like, so that collision between the battery cell 3 and the restraint portion 11 during vibration can be effectively buffered, and stress of the battery cell 3 can be improved, thereby reducing risk of damage to the battery cell 3.

Referring to fig. 1, in some embodiments, the battery cell module further includes a longitudinal beam 21 and a transverse beam 22, where the longitudinal beam 21 and the transverse beam 22 are fixedly connected inside the case 2 and divide the inside of the case 2 into a plurality of accommodating cavities 24, and the battery cell 3 is assembled in the accommodating cavities 24. Optionally, the inside of the box body 2 is divided into a plurality of accommodating cavities 24 by the longitudinal beams 21 and the cross beams 22, and a corresponding number of the battery cells 3 are arranged in the corresponding accommodating cavities 24, so that the longitudinal beams 21 and the cross beams 22 limit the displacement of the battery cells 3 in the inside of the box body 2, and the battery cells 3 can be comprehensively limited by the cooperation of the box body 2, the constraint parts 11, the longitudinal beams 21 and the cross beams 22, and optionally, the structural strength of the box body 2 can be enhanced by the longitudinal beams 21 and the cross beams 22, so that the box body 2 can be more reliably fixed to the battery cells 3, and optionally, the longitudinal beams 21 and the cross beams 22 can be fixedly connected in the inside of the box body 2 by welding, clamping, bolting or riveting and other connecting modes.

Referring to fig. 1 and 3, in some embodiments, the restraint portion 11 is cooperatively connected with the longitudinal beam 21, and two ends of the restraint portion 11 along the width direction of the longitudinal beam 21 are respectively abutted against the battery cells 3 located at two sides of the longitudinal beam 21, where the battery cells 3 are disposed in the accommodating cavity 24 along the length direction of the longitudinal beam 21. Optionally, the constraint part 11 is disposed opposite to the longitudinal beam 21, optionally, the constraint part 11 and the longitudinal beam 21 may be connected in a matching manner by welding, clamping, bolting or riveting, so that the constraint part 11 is fixed on the case 2, two ends of the constraint part 11 along the width direction of the longitudinal beam 21 are tightly pressed on the shoulder of the electric core 3, thereby limiting displacement of the electric core 3 in the height direction, optionally, the constraint part 11 is a protruding structure formed by the cover body 1, and the protruding structure is internally provided with a first pressing strip 12, optionally, the constraint part 11 and the longitudinal beam 21 are connected in sequence by a fastener, so that strength of the constraint part 11 is improved, structural stability of the constraint part 11 is high, limiting of the electric core 3 is effectively realized, optionally, a first buffer 13 is disposed between the constraint part 11 and the electric core 3, and the electric core 3 can be effectively buffered, and the impact effect of the constraint part 11 and the electric core 3 can be further improved by the buffer 3 can be further improved, and the impact effect of the electric core 3 can be further reduced by the buffer 11.

Referring to fig. 1 and 3, in some embodiments, the longitudinal beam 21 extends toward the restraint portion 11 to form an extension portion 23, and the extension portion 23 is cooperatively connected with the restraint portion 11. Optionally, the constraint part 11 is cooperatively connected with the longitudinal beam 21, so that the constraint part 11 does not need to be directly connected with the box body 2, the number of holes on the box body 2 is reduced, and enough space can be provided for the layout of a subsequent cooling system. Optionally, the extension portion 23 may be a buckle or a lock for clamping the constraint portion 11, may be a pin, a screw, or other structures for connecting the constraint portion 11, and optionally, the extension portion 23 may be provided with a structure for connecting with the constraint portion 11, such as a screw hole, a lock hole, or the like, and sequentially passes through the first pressing strip 12, the constraint portion 11, and the first buffer member 13, and is connected with the screw hole or the lock hole on the extension portion 23 by using a fastener. Optionally, the extension 23, the longitudinal beam 21 and the transverse beam 22 may be in a hollow bracket structure, so as to facilitate heat dissipation with the battery cell 3.

Referring to fig. 1, 3 and 4, in some embodiments, the cover 1 is formed with a limiting portion 14 cooperatively connected with the beam 22, and a second buffer 15 is disposed between the limiting portion 14 and the beam 22. Optionally, the longitudinal beams 21 disposed inside the case 2 are disposed along the length direction of the case 2, the cross beams 22 are disposed along the width direction of the case 2, or the longitudinal beams 21 are disposed along the width direction of the case 2, and the cross beams 22 are disposed along the length direction of the case 2, so as to divide the inside of the case 2 into a plurality of accommodating cavities 24, that is, each accommodating cavity is surrounded by the longitudinal beams 21 and the cross beams 22, optionally, the limiting portion 14 may be a protruding structure formed by the cover 1, optionally, the limiting portion 14 is a protruding structure fixedly connected with the cover 1 by welding, bolting, snap connection, or the like; optionally, the limiting portion 14 is a protruding structure protruding toward the beam 22, that is, another protruding structure is provided on the cover 1, and the limiting portion 14 formed by the protruding structure is connected with the beam 22 in a matching manner, so that the cover 1 and the box 2 are integrally fixed, and further limiting is performed on the battery cell 3. Optionally, the limiting portion 14 and the cross beam 22 may be cooperatively connected by welding, clamping, bolting, riveting, or other connection methods. The second buffer member 15 is disposed between the limiting portion 14 and the cross beam 22, and collision or friction between the limiting portion 14 and the cross beam 22 during vibration can be effectively buffered by the second buffer member 15, and stress conditions between the limiting portion 14 and the cross beam 22 can be improved, so that the risk of damage to the cover 1 or the cross beam 22 is reduced. Alternatively, the second buffer member 15 may be a member with a buffer effect made of foam, silicone rubber, or rubber pad. Optionally, in the height direction of the battery cell 3, the displacement of the battery cell 3 is limited by the constraint part 11 and the box 2, where the constraint part 11 is cooperatively connected with the longitudinal beam 21, so as to drive two ends of the constraint part 11 along the width direction of the longitudinal beam 21 to be tightly pressed on the shoulder of the battery cell 3, thereby limiting the displacement of the battery cell 3 along the height direction, meanwhile, the longitudinal beam 21 and the cross beam 22 limit the displacement of the battery cell 3 in the box 2, and the limiting part 14 is cooperatively connected with the cross beam 22, so that the longitudinal beam 21, the cross beam 22, the cover 1 and the box 2 are integrally fixed, thereby comprehensively limiting the battery cell 3 in the accommodating cavity, and effectively limiting the movement of the battery cell 3 along any direction.

Referring to fig. 1 and 4, in some embodiments, a second bead 16 is further included, and the second bead 16 is disposed in the limiting portion 14. Optionally, the second pressing strip 16 may be made of plastic, metal or other synthetic materials, and optionally, the second pressing strip 16 may be disposed in the limiting portion 14 by means of bonding, bolting or welding, so as to improve the strength of the limiting portion 14, so that the connection between the limiting portion 14 and the cross beam 22 is more fastened, and the structural stability of the limiting portion 14 is improved.

Referring to fig. 1 and 2, in some embodiments, a sealing portion 17 is formed at an edge of the cover 1 to be cooperatively connected with the case 2, and a sealing member 18 is connected between the sealing portion 17 and the case 2. Optionally, the sealing part 17 may be wrapped on the outer side of the edge of the box body 2, optionally, the sealing part 17 and the box body 2 may be connected in a matched manner by welding, clamping, bolting or riveting, so that the cover body 1 and the periphery of the box body 2 are matched, optionally, the sealing element 18 may be a component with a sealing effect, such as foam or a sealing rubber pad, so that the cover body 1 and the periphery edge of the box body 2 are connected in a sealing manner, and final fixing and full package sealing of the box cover and the lower box body 2 are realized.

Referring to fig. 1, 2, 3 and 4, in some embodiments, the battery pack includes a battery pack case cover, a case 2 and a plurality of battery cells 3, the battery pack case cover includes a case body 1, a first bead 12 and a second bead 16, the case body 1 is formed with a constraint part 11, a limit part 14 and a sealing part 17, the constraint part 11, the limit part 14, the sealing part 17 and the case body 1 may be integrally formed, alternatively, the constraint part 11 and the limit part 14 may be a protrusion structure formed by protruding the case body 1 toward the battery cells 3 or the case body 2, the first bead 12 is disposed at a side of the constraint part 11 away from the battery to improve strength of the constraint part 11 and structural stability of the constraint part 11 is high, the second bead 16 is disposed at a side of the limit part 14 away from the case body 2, in order to improve the strength of the limiting part 14 and the structural stability of the limiting part 14, the inside of the box body 2 is provided with the longitudinal beam 21 and the cross beam 22, the inside of the box body 2 is divided into a plurality of accommodating cavities 24 by the longitudinal beam 21 and the cross beam 22, the battery cells 3 are arranged in the corresponding accommodating cavities 24 respectively, optionally, the restraining parts 11 are connected with the longitudinal beam 21 in a matching way, two ends of the restraining parts 11 along the width direction of the longitudinal beam 21 are respectively abutted with the battery cells 3 positioned at two sides of the longitudinal beam 21, wherein the battery cells 3 are arranged in the accommodating cavities 24 along the length direction of the longitudinal beam 21, the restraining parts 11 are connected with the longitudinal beam 21 through bolts so as to drive the two ends of the restraining parts 11 along the width direction of the longitudinal beam 21 to be tightly pressed on the shoulders of the battery cells 3, thereby limiting the displacement of the battery cells 3 along the height direction, optionally, the first buffer member 13 is disposed between the restraint portion 11 and the electric core 3, optionally, the first pressing strip 12, the restraint portion 11, the first buffer member 13 and the longitudinal beam 21 are respectively provided with corresponding screw holes, and bolts can sequentially penetrate through the first pressing strip 12, the restraint portion 11, the first buffer member 13 and the longitudinal beam 21, so that collision between the electric core 3 and the restraint portion 11 during vibration can be effectively buffered, stress of the electric core 3 can be improved, the risk of damage to the electric core 3 is reduced, and the restraint portion 11 can be tightly contacted with the electric core 3 through the first buffer member, so that limiting effect of the restraint portion 11 on the electric core 3 is improved. Optionally, the limiting part 14 is connected with the cross beam 22 in a matching manner, so that the longitudinal beam 21, the cross beam 22, the cover 1 and the box 2 are integrally fixed, the electric core 3 in the accommodating cavity is limited in an omnibearing manner, the electric core 3 can be effectively limited to move along any direction, optionally, a second buffer member 15 is arranged between the limiting part 14 and the cross beam 22, optionally, the second pressing strip 16, the limiting part 14, the second buffer member 15 and the cross beam 22 are respectively provided with corresponding screw holes, bolts can be adopted to sequentially penetrate through the second pressing strip 16, the limiting part 14, the second buffer member 15 and the cross beam 22, collision or friction between the limiting part 14 and the cross beam 22 can be effectively buffered during vibration, the stress condition between the limiting part 14 and the cross beam 22 can be improved, the risk that the cover 1 or the cross beam 22 is damaged is reduced, and then the sealing part 17 and the box 2 are sealed by using the sealing part 17 and the sealing part between the box 2 and the box 2 are sealed.

The technical means disclosed by the scheme of the utility model is not limited to the technical means disclosed by the embodiment, and also comprises the technical scheme formed by any combination of the technical features. It should be noted that modifications and adaptations to the utility model may occur to one skilled in the art without departing from the principles of the present utility model and are intended to be within the scope of the present utility model.

Claims (10)

1. A battery pack case lid, comprising:

the cover body (1) is used for being matched with the box body (2) of the battery pack;

and the restraint part (11) is arranged on the cover body (1), and the restraint part (11) protrudes towards the direction of the battery cell (3) in the battery pack and is used for abutting against the battery cell (3).

2. The battery pack case cover according to claim 1, wherein: the restraining part (11) is a protruding structure formed by the cover body (1), and a first pressing strip (12) is arranged in the protruding structure.

3.A battery pack, comprising:

the battery pack case cover according to claim 1 or 2;

a case (2);

The battery cell (3) is assembled on the box body (2) along one end of the battery cell (3) in the first direction, and the restraint part (11) is abutted with the other end of the battery cell (3) along the first direction.

4. A battery pack according to claim 3, wherein: a first buffer (13) is arranged between the restraint part (11) and the battery cell (3).

5. A battery pack according to claim 3, wherein: the battery cell battery pack comprises a case body (2), and is characterized by further comprising a longitudinal beam (21) and a transverse beam (22), wherein the longitudinal beam (21) and the transverse beam (22) are fixedly connected inside the case body (2), the inside of the case body (2) is divided into a plurality of accommodating cavities (24), and the battery cells (3) are assembled in the accommodating cavities (24).

6. The battery pack according to claim 5, wherein: the restraint part (11) is connected with the longitudinal beam (21) in a matched mode, two ends of the restraint part (11) in the width direction of the longitudinal beam (21) are respectively abutted to the battery cells (3) positioned on two sides of the longitudinal beam (21), and the battery cells (3) are arranged in the accommodating cavity (24) in the length direction of the longitudinal beam (21).

7. The battery pack according to claim 6, wherein: the longitudinal beam (21) extends towards the restraint part (11) to form an extension part (23), and the extension part (23) is connected with the restraint part (11) in a matching way.

8. The battery pack according to claim 5, wherein: the cover body (1) is provided with a limiting part (14) which is connected with the cross beam (22) in a matching way, and a second buffer piece (15) is arranged between the limiting part (14) and the cross beam (22).

9. The battery pack of claim 8, wherein: the device further comprises a second pressing strip (16), and the second pressing strip (16) is arranged in the limiting part (14).

10. A battery pack according to claim 3, wherein: the edge of the cover body (1) is provided with a sealing part (17) which is connected with the box body (2) in a matching way, and a sealing piece (18) is connected between the sealing part (17) and the box body (2).