CN211480131U - Power battery pack and electric vehicle - Google Patents

Abstract

The application provides a power battery package and electric motor car. This power battery holds carrier, a plurality of electric core, locating part and fastener including bearing. The battery cell is placed in the containing area of the bearing part in a battery monomer mode, and the battery cell is fixed through the matching of the limiting part and the fastening part. Compare in the great battery module of volume, the electric core of battery monomer form can adapt to the power battery package of different shapes, size.

Description

Power battery pack and electric vehicle

Technical Field

The application relates to the field of electric vehicles, in particular to a power battery pack and an electric vehicle.

Background

The production process of the conventional power battery pack comprises the steps of firstly assembling single battery cores into a battery module, and then assembling the battery module into the power battery pack. Because of different vehicle body structures, the shape and size difference between the power battery packs is very large, so that the same battery module cannot be compatible with the power battery packs with different shapes and sizes. Therefore, it is necessary to develop different shapes of battery modules according to different power battery packs, which in turn leads to an increase in the development period and cost of the product.

SUMMERY OF THE UTILITY MODEL

In order to overcome at least one of the deficiencies in the prior art, one of the objectives of the present application is to provide a power battery pack, where the power battery pack includes a bearing component, a limiting component, a fastening component, and a plurality of battery cells, and the bearing component includes an accommodating area with a preset size;

the plurality of battery cells are arranged in an array and arranged in the accommodating area;

the limiting part is arranged at a preset position of the edge of the accommodating area and is attached to the battery cell positioned at the edge of the accommodating area;

the fastener is used for being matched with the limiting part and reinforcing the electric cores along the array arrangement direction, so that the electric cores are tightly attached.

Optionally, the limiting members include a first limiting member and a second limiting member;

the first locating part and the second locating part are arranged on two sides of the containing area along a first direction in which the battery cells are arranged in an array.

Optionally, the fastener includes a guide unit and a force application unit, the first limiting member is provided with a first opening, and the second limiting member is provided with a second opening;

the guide unit penetrates through the first opening and the second opening;

the force application unit acts on the first limiting part and the second limiting part, so that the first limiting part and the second limiting part move along the guide unit, and the battery core is reinforced in the first direction.

Optionally, the first opening and the second opening correspond to each other one to one.

Optionally, the guiding unit is a screw; the force applying unit is a nut.

Optionally, the guide unit is attached to the battery cells at the edge of the accommodating area along a second direction in which the battery cells are arranged in the array.

Optionally, the power battery pack further includes a third limiting member;

one end of the third limiting part is arranged on the first limiting part, and the other end of the third limiting part transversely crosses the battery cell along the first direction and is arranged on the second limiting part, so that the battery cell is fixed in the vertical direction.

Optionally, a buffer member is disposed between the electric cores to absorb impact between the electric cores.

Optionally, the battery cell is a square battery cell with tabs located on the same side, a groove is formed in the surface of the square battery cell, and the groove is used for absorbing volume expansion generated in the working process of the square battery cell;

the power battery pack further comprises an upper cover arranged on one side of the lug, and a protective cover is further arranged between the upper cover and the lug.

It is another object of the embodiments of the present application to provide an electric vehicle, which includes the power battery pack.

Compared with the prior art, the method has the following beneficial effects:

in summary, the embodiment of the application provides a power battery pack and an electric vehicle. This power battery holds carrier, a plurality of electric core, locating part and fastener including bearing. The battery cell is placed in the containing area of the bearing part in a battery monomer mode, and the battery cell is fixed through the matching of the limiting part and the fastening part. Compare in the great battery module of volume, the electric core of battery monomer form can adapt to the power battery package of different shapes, size.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

Fig. 1 is a schematic structural diagram of a power battery pack provided in an embodiment of the present application;

fig. 2 is a schematic structural view illustrating a matching between a limiting member and a fastening member according to an embodiment of the present disclosure;

fig. 3 is a schematic structural diagram of a corresponding relationship between a first opening and a second opening provided in the present embodiment;

fig. 4 is a schematic structural diagram of a battery cell provided in an embodiment of the present application;

fig. 5 is a schematic structural diagram of an upper cover according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of a protective cover according to an embodiment of the present application.

Icon: 100-a power battery pack; 1100-a carrier; 1200-a fastener; 1300-electric core; 1410-a first limit; 1420-a second limit stop; 1411-a first opening; 1421 — second opening; 1310-a tab; 1500-upper cover; 1600 — protective shield.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience of describing the present application and simplifying the description, but do not indicate or imply that the devices or elements 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 application. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present application, it is further noted that, unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

As described in the background art, the power battery packs have a large difference in shape and size between different vehicle body structures, so that the same battery module cannot be compatible with power battery packs having different shapes and sizes. Therefore, it is necessary to develop different shapes of battery modules according to different power battery packs, which in turn leads to an increase in the development period and cost of the product.

In view of this, the present application provides a power battery pack. Referring to fig. 1, the power battery pack 100 includes a carrier 1100, a limiting member, a fastener 1200, and a plurality of battery cells 1300, where the battery cells 1300 are square battery cells. The carrier 1100 includes a receiving area with a predetermined size.

It should be understood that although the battery cells 1300 in the form of single battery cells can accommodate power battery packs 100 with different shapes and sizes due to their small size, the numerous battery cells 1300 are difficult to fix. Based on this, the carrier 1100 is used for carrying each battery cell 1300 when the battery cells 1300 are placed in the power battery pack 100; based on the carrier 1100, the limiting member is used to define a placement position of the battery cell 1300 in the carrier 1100; the fastener 1200 is used for cooperating with a stopper to reinforce the battery cell 1300 placed in the carrier 1100.

Specifically, the plurality of battery cells 1300 are arranged in an array and disposed in the accommodating area. The limiting piece is arranged at a preset position of the edge of the accommodating area and is attached to the battery cell 1300 positioned at the edge of the accommodating area; the fastener 1200 is configured to cooperate with the stoppers to reinforce the battery cells 1300 in the array arrangement direction, so that the battery cells 1300 are tightly attached to each other. The greater the force applied by the fastener 1200 to the stoppers along the direction in which the battery cells 1300 are arranged in an array, the tighter the battery cells 1300 are attached to each other.

Thus, the battery core 1300 is placed in the accommodating area in a battery monomer form, and the battery core 1300 is reinforced by the cooperation of the limiting part and the fastener 1200. Compare in the great battery module of volume, the electric core 1300 of battery monomer form can adapt to the power battery package 100 of different shapes, size.

Referring to fig. 2, the limiting member includes a first limiting member 1410 and a second limiting member 1420, and the first limiting member 1410 and the second limiting member 1420 are disposed at two sides of the accommodating region along a first direction in which the battery cells 1300 are arranged in an array. Referring to fig. 1 again, the first direction is the x direction in fig. 1.

In order to achieve the mutual matching between the limiting member and the fastening member 1200 to reinforce the battery cell 1300, please refer to fig. 3, as a possible implementation manner, the first limiting member 1410 is provided with a first opening 1411, and the second limiting member 1420 is provided with a second opening 1421.

The fastener 1200 includes a guide unit and a force application unit, wherein the guide unit passes through the first opening 1411 and the second opening 1421. The force applying unit acts on the first limiting member 1410 and the second limiting member 1420, so that the first limiting member 1410 and the second limiting member 1420 move along the guiding unit, and the battery cell 1300 is reinforced in the first direction.

The first limiting element 1410 can move along the extending direction of the guiding unit through the first opening 1411. Similarly, the second limiting member 1420 can also move along the extending direction of the guiding unit. The second direction that this guide unit was arranged along electric core 1300 array with the electric core 1300 laminating of the regional border position of holding for this fastener 1200 not only can fix electric core 1300 with the cooperation of first spacing and second locating part 1420, can also carry out spacingly to electric core 1300 in the second direction. Referring to fig. 1 again, the second direction is the y direction in fig. 1.

As another possible embodiment, the fastener 1200 includes a guide unit and a force application unit. The carrier 1100 is provided with a third opening. One end of the guiding unit passes through the third opening, and the other end abuts against the first limiting member 1410 or the second limiting member 1420 along the first direction. Wherein the third opening is movable in a direction in which the guide unit extends.

It should be noted that the matching relationship between the fastening member 1200 and the first limiting member 1410 and the second limiting member 1420 is not limited to the above manner, and other matching relationships may also be provided, and the embodiments of the present invention are not limited thereto.

Referring to fig. 2 again for the guiding unit and the force applying unit included in the fastening device 1200, as a possible implementation, the guiding unit is a screw, and the force applying unit is a nut. The screw rod passes through the first opening 1411 and the second opening 1421, and applies a force to the first limiting member 1410 and the second limiting member 1420 under the cooperation of the nuts, so that the first limiting member 1410 and the second limiting member 1420 approach each other, and the battery cell 1300 is reinforced.

The first openings 1411 correspond to the second openings 1421 one to one. As a possible implementation, the screw penetration may pass through the first opening 1411 and the second opening 1421 in parallel with the first direction. As another possible embodiment, the screw may pass through the first opening 1411 and the second opening 1421 to form a predetermined angle with the first direction.

Optionally, the power battery pack 100 further includes a third limiting member, one end of the third limiting member is disposed on the first limiting member 1410, and the other end of the third limiting member crosses the battery cell 1300 along the first direction and is disposed on the second limiting member 1420, so as to fix the battery cell 1300 in the vertical direction.

It should be understood that, in the embodiment of the present application, the battery cells 1300 are placed in the receiving area of the carrier 1100 in a single battery form, and the fastening members 1200, the first limiting members 1410 and the second limiting members 1420 are matched with the array of the battery cells 1300 in the first direction and the second direction to fix the battery cells 1300. If the electric vehicle equipped with the power battery pack 100 runs on a concave-convex road surface, the electric vehicle may cause the battery cell 1300 to displace in the vertical direction when the electric vehicle jolts up and down on the concave-convex road surface. Based on this, the battery cell 1300 is fixed in the vertical direction by a third stopper that straddles the battery cell 1300.

Optionally, a buffer is disposed between the battery cells 1300. The buffer member is used to absorb the impact that may occur between the battery cells 1300.

Optionally, referring to fig. 4, the battery cell 1300 is a square battery cell, and the tab 1310 of the battery cell 1300 is located on the same side of the battery cell 1300. Thus, the tab 1310 of the battery cell 1300 is welded to the bus bar. The bus bar is used for connecting a plurality of battery cells 1300 in the power battery pack 100 in series or in parallel.

Optionally, referring to fig. 5, in order to prevent the battery cells 1300 in the power battery pack 100 from directly contacting with the outside, the power battery pack 100 further includes an upper cover 1500 disposed on one side of the tab 1310. The upper cover 1500 is used to isolate the battery cell 1300 inside the power battery pack 100 from the outside. Since the tab 1310 and the bus bar of the battery cell 1300 are both exposed, there is a risk of short circuit of the tab 1310 due to direct contact with the upper cover 1500. Referring to fig. 6, the power battery pack 100 further includes a protection cover 1600 disposed between the upper cover 1500 and the tab 1310 to prevent the tab 1310 from directly contacting the upper cover 1500.

The protection cover 1600 is an insulator. Specifically, the material of the protection cover 1600 is not limited to plastic, insulating buffer, etc., as long as the tab 1310 of the battery cell 1300 is prevented from directly contacting the upper cover 1500.

It should be noted that, since the tab 1310 and the bus bar of the battery cell 1300 are exposed, the third limiting member for fixing the battery cell 1300 in the vertical direction needs to be insulated to prevent the third limiting member from contacting the tab 1310 and the bus bar, which may cause a short circuit. Therefore, the third limiting part can be sprayed with insulating paint or adhered with an insulating sheet.

Of course, the insulation processing of the third limiting member includes other manners, and the embodiment of the present application is not particularly limited.

Optionally, a groove is provided on the surface of the square battery cell 1300, and the groove is used for absorbing volume expansion generated during the operation of the square battery cell 1300. Therefore, the influence of the volume change generated in the working process of the battery cell 1300 on the overall structure of the power battery pack 100 is avoided through the groove.

The embodiment of the application also provides an electric vehicle which comprises the power battery.

In summary, the embodiment of the application provides a power battery pack and an electric vehicle. This power battery holds carrier, a plurality of electric core, locating part and fastener including bearing. The battery cell is placed in the containing area of the bearing part in a battery monomer mode, and the battery cell is fixed through the matching of the limiting part and the fastening part. Compare in the great battery module of volume, the electric core of battery monomer form can adapt to the power battery package of different shapes, size.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The above description is only for various embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of changes or substitutions within the technical scope of the present application, and all such changes or substitutions are included in the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (10)

1. The power battery pack is characterized by comprising a bearing piece, a limiting piece, a fastening piece and a plurality of battery cells, wherein the bearing piece comprises an accommodating area with a preset size;

the plurality of battery cells are arranged in an array and arranged in the accommodating area;

the limiting part is arranged at a preset position of the edge of the accommodating area and is attached to the battery cell positioned at the edge of the accommodating area;

the fastener is used for being matched with the limiting part and reinforcing the electric cores along the array arrangement direction, so that the electric cores are tightly attached.

2. The power battery pack of claim 1, wherein the retaining member comprises a first retaining member and a second retaining member;

the first locating part and the second locating part are arranged on two sides of the containing area along a first direction in which the battery cells are arranged in an array.

3. The power battery pack of claim 2, wherein the fastener comprises a guide unit and a force application unit, the first limiting member defines a first opening, and the second limiting member defines a second opening;

the guide unit penetrates through the first opening and the second opening;

the force application unit acts on the first limiting part and the second limiting part, so that the first limiting part and the second limiting part move along the guide unit, and the battery core is reinforced in the first direction.

4. The power battery pack of claim 3, wherein the first opening corresponds to the second opening in a one-to-one correspondence.

5. The power battery pack of claim 3, wherein the guide unit is a screw; the force applying unit is a nut.

6. The power battery pack of claim 3, wherein the guide unit is attached to the cells at the edge of the accommodating area along the second direction of the cell array arrangement.

7. The power battery pack of claim 2, further comprising a third retaining member;

one end of the third limiting part is arranged on the first limiting part, and the other end of the third limiting part transversely crosses the battery cell along the first direction and is arranged on the second limiting part, so that the battery cell is fixed in the vertical direction.

8. The power battery pack of claim 1, wherein a buffer is disposed between the cells to absorb impact between the cells.

9. The power battery pack according to claim 1, wherein the battery cell is a square battery cell with the electrode tabs located on the same side, and a groove is formed in the surface of the square battery cell and used for absorbing volume expansion generated in the working process of the square battery cell;

the power battery pack further comprises an upper cover arranged on one side of the lug, and a protective cover is further arranged between the upper cover and the lug.

10. An electric vehicle comprising the power battery pack according to any one of claims 1 to 9.

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