CN219717152U

CN219717152U - Battery pack, electric automobile and electric equipment

Info

Publication number: CN219717152U
Application number: CN202321236377.8U
Authority: CN
Inventors: 武传龙
Original assignee: China Innovation Aviation Technology Group Co ltd
Current assignee: China Innovation Aviation Technology Group Co ltd
Priority date: 2023-05-19
Filing date: 2023-05-19
Publication date: 2023-09-19
Anticipated expiration: 2033-05-19

Abstract

The utility model relates to the technical field of new energy and discloses a battery pack, an electric automobile and electric equipment. In addition, the thickness of the limiting portion is smaller than the thickness of the supporting portion in the stacking direction of the cells; and the height of the supporting part is lower than the height of the battery along the box entering direction of the battery. Thereby be convenient for group battery compression income case, prevent to cause the interference to the centre gripping instrument, make things convenient for the smooth business turn over of centre gripping instrument along the income case direction of battery.

Description

Battery pack, electric automobile and electric equipment

Technical Field

The utility model relates to the technical field of new energy, in particular to a battery pack, an electric automobile and electric equipment.

Background

With the continuous development of battery technology, the requirement on energy density is higher and higher, in order to simplify components in a battery pack, a battery module is omitted from the existing part of battery packs, and batteries are directly stacked in battery bins of the battery packs, namely, a CIR (Cell in Room) scheme. In order to ensure that the battery array has a certain pretightening force in the battery compartment, the battery array is compressed firstly and then is placed between fixing beams for limiting the battery when the battery is put into the box, and the height of the fixing beams is usually lower than that of the battery so as to ensure that the battery is put into the box smoothly. This can result in a gap between the top of the fixed beam in the battery pack and the cover of the battery pack where the cover is unsupported. When the upper part of the box cover is stressed, the bearing capacity of the upper cover corresponding to the area of the limiting beam is poor, bending deformation is easy to occur, and the battery directly participates in bearing, so that the battery is easy to squeeze and damage, and certain potential safety hazard exists.

Disclosure of Invention

In view of the above, the utility model provides a battery pack, an electric automobile and electric equipment, so as to solve the problem that the upper cover of the battery pack has poor bearing capacity in the area corresponding to the limit beam due to the gap between the limit beam and the upper cover of the battery pack.

In a first aspect, the present utility model provides a battery pack comprising:

a case in which a battery is disposed;

the cover plate is covered on the box body;

a fixed beam disposed in the case, the fixed beam constituting an abutting unit of at least one side of the battery in a stacking direction; the fixing beam at least comprises a supporting part and a limiting part along the box entering direction of the battery, the supporting part is arranged below the limiting part, and the supporting part is suitable for supporting the cover plate;

the thickness of the limiting part is smaller than that of the supporting part along the stacking direction of the batteries;

and the height of the supporting part is lower than the height of the battery along the box entering direction of the battery.

According to the battery pack provided by the utility model, the limiting part is arranged above the supporting part, so that the top surface of the limiting part can support the cover plate above the box body, the poor bearing capacity of the cover plate corresponding to the area of the fixed beam is avoided, the bending deformation of the cover plate is prevented, the service life of the cover plate is prolonged, the situation that the electric gap is reduced after the cover plate is deformed and even the battery is extruded is avoided, the situation that the battery directly participates in bearing when the cover plate is pressed down is avoided, the battery is prevented from being extruded and damaged, and the safety is improved. In addition, the thickness of the limiting portion is smaller than the thickness of the supporting portion in the stacking direction of the cells; and the height of the supporting part is lower than the height of the battery along the box entering direction of the battery. Thereby be convenient for group battery compression income case, prevent to cause the interference to the centre gripping instrument, make things convenient for the smooth business turn over of centre gripping instrument along the income case direction of battery.

In a second aspect, the present utility model also provides an electric vehicle, including: the battery pack as described above; the chassis of the electric automobile is at least partially a cover plate of the battery pack.

Because the electric vehicle includes the battery pack, the same effects as the battery pack are provided, and the description thereof will be omitted.

In a third aspect, the present utility model also provides an electric device, including: the battery pack comprises an electric equipment body and the battery pack which is arranged on the electric equipment body.

Because the electric equipment comprises the battery pack, the electric equipment has the same effect as the battery pack, and the electric equipment is not described in detail herein.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic diagram of an electric vehicle according to an embodiment of the present utility model;

FIG. 2 is an exploded view of a frame and a battery pack according to an embodiment of the present utility model;

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

fig. 4 is a top view of a case according to an embodiment of the present utility model.

Reference numerals illustrate:

1-car body, 2-car frame, 201-car frame lifting hole, 3-battery pack, 31-box, 311-first notch, 312-second notch, 32-cover plate, 321-cover plate lifting hole, 33-fixed beam, 331-supporting part, 332-limiting part, 34-longitudinal beam, 35-side beam, 301-box lifting hole and 4-fixing piece.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In addition, the technical features of the different embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.

In order to facilitate the compression of the batteries into the box, a plurality of limiting beams are usually arranged in the battery pack, and the height of the limiting beams is lower than that of the batteries so as to facilitate the in and out of the clamping tools. However, for the electric automobile assembly form of the CTB scheme, the cover plate of the battery pack is directly used as a chassis of the whole automobile, so that the cover plate directly bears the weight, if a gap exists between the top surface of the limiting beam and the cover plate, the area of the cover plate corresponding to the limiting beam is poor in bearing capacity and easy to bend and deform in the bearing process, and as the cover plate is not supported by the beam, the battery directly participates in bearing when being pressed down, the battery is easy to be extruded and damaged, and a certain potential safety hazard exists; in addition, if no gap exists between the limiting beam and the upper cover of the battery pack, the clamping tool is inconvenient to enter and exit in the process of putting the batteries into the box, and the assembly is difficult.

The embodiment of the utility model provides a battery pack, which can ensure that the area of a cover plate corresponding to a limiting beam has enough bearing capacity, and can facilitate the in-out of a clamping tool in the assembly stage of putting batteries into a box.

Embodiments of the present utility model are described below with reference to fig. 1 to 4.

According to an embodiment of the present utility model, in one aspect, there is provided a battery pack 3 including:

a case 31 in which a battery is provided;

a cover plate 32 covering the case 31;

a fixing beam 33 provided in the case 31, the fixing beam 33 constituting an abutting unit of at least one side of the battery in a stacking direction; the fixing beam 33 at least comprises a supporting portion 331 and a limiting portion 332 along the in-box direction of the battery, the supporting portion 331 is disposed below the limiting portion 332, and the supporting portion 331 is adapted to support the cover plate 32;

the thickness of the limiting part 332 is smaller than that of the supporting part 331 in the stacking direction of the batteries;

the height of the supporting portion 331 is lower than the height of the battery in the in-box direction of the battery.

Alternatively, the batteries disposed in the case 31 are stacked one on another along a large surface perpendicular to the batteries to form a battery pack. The stacking direction of the cells is the direction perpendicular to the large surface of the cells.

The direction of the battery entering the box is the gravity direction of the battery.

Optionally, the fixing beam 33 is disposed in the case 31 and forms an abutment unit of at least one side of the battery in the stacking direction, that is, the fixing beam 33 can limit the battery pack to maintain the grouping force of the battery pack. The fixing beam 33 may be a cross beam in the case 31, and the extending direction of the fixing beam 33 is adapted to be parallel to the large surface of the battery. As an implementation form, the fixing beam 33 is matched with a side beam of the battery, so that the fixing beam 33 and the side beam respectively abut against one side surface of the battery pack.

Optionally, the fixing beam 33 includes at least a supporting portion 331 and a limiting portion 332 along the in-box direction of the battery, and the supporting portion 331 is disposed below the limiting portion 332; the side surface of the supporting portion 331 is adapted to abut against the large surface of the battery, so as to limit the battery pack and maintain the grouping force of the battery pack. The supporting portion 331 may be fixedly connected with the bottom plate of the box 31, and may also be fixedly connected with a side beam surrounding the box 31.

Through set up spacing portion 332 in the top of supporting part 331 to make the top surface of spacing portion 332 can support the apron 32 of box 31 top, avoid the apron to correspond the regional bearing capacity of fixed beam 33 is relatively poor, prevents that apron 32 from buckling deformation from appearing, improves the life-span of apron 32, and can avoid the electric gap to diminish after the apron 32 warp and even the condition emergence of extrusion battery, the battery can directly participate in the condition of bearing when avoiding the apron to push down, prevents that the battery from being extrudeed the damage, improves the security.

Alternatively, the thickness of the limiting part 332 is smaller than that of the supporting part 331 in the stacking direction of the batteries; and the height of the supporting portion 331 is lower than the height of the battery in the in-box direction of the battery. Thereby be convenient for group battery compression income case, prevent to cause the interference to the centre gripping instrument, make things convenient for the smooth business turn over of centre gripping instrument along the income case direction of battery.

Optionally, a plurality of fixing beams 33 are disposed in the battery pack, and the plurality of fixing beams 33 are matched with the side beams 35 of the box 31, so that a containing space for containing the battery can be formed. As a variant, at least one longitudinal beam 34 perpendicular to the fixing beam 33 may be further disposed in the case 31, and the fixing beam 33 cooperates with the longitudinal beam 34 and the side beam 35 to form an accommodating space for accommodating the battery. Optionally, the height of the side member 34 is smaller than the height of the battery, and the height of the side member 35 is higher than the height of the side member 34.

Optionally, the supporting portion 331 and the limiting portion 332 are integrally formed.

As shown in connection with fig. 1 and 2, in some embodiments, the upper surface of the fixing beam 33 directly or indirectly abuts against the lower surface of the cover plate 32.

Optionally, after the battery pack is assembled, the supporting portion 331 and the height of the limiting portion 332 just abut against the cover plate 32, so as to support the cover plate 32, prevent the cover plate 32 from bending and deforming, and improve the service life of the cover plate 32.

As shown in connection with fig. 2 and 3, in some embodiments, the securing beam 33 is adapted to divide the battery pack into at least two chambers;

the supporting portion 331 is provided with a first notch 311, and/or the supporting portion 331 and the frame of the box 31 are formed with a first notch 311 at intervals;

the first notch 311 is adapted to receive an electrical connector for connecting the batteries adjacent the chamber.

Optionally, the first notch 311 is formed relatively above the longitudinal beam 34.

The adjacent battery packs are connected by copper bars, and the first notch 311 is arranged on the supporting part 331, so that the copper bars can conveniently pass through the copper bars, and the adjacent battery packs can be conveniently connected.

In some embodiments, a first buffer (not shown) is provided between the upper surface of the fixing beam 33 and the cover plate 32. The first buffer member is made of an elastic material, so that the impact between the cover plate 32 and the upper surface of the fixing beam 33 can be reduced, and noise can be reduced.

Optionally, the sum of the preset height of the first buffer member and the height of the fixing beam 33 is greater than the height of the battery.

It should be noted that, when the preset height of the first buffer member is the height of the first buffer member after the first buffer member is compressed between the fixed beam and the cover plate, that is, the compressed height of the first buffer member after the battery package is assembled, when the front end size chain is designed.

According to the embodiment of the utility model, the cover plate 32 is supported by the fixed beam, so that the strength of the cover plate 32 of the battery pack can be effectively ensured, and the sum of the preset height of the first buffer piece and the height of the fixed beam 33 is further limited to be larger than the height of the battery, so that the cover plate 32 of the battery pack can be prevented from beating the battery in the process of bumping during running. If in the CTB model, it is also possible to avoid the cover plate 32 from pressing the battery after load-bearing deformation.

Additionally, if the output end of the battery is on the top surface and the bus bar is arranged on the top of the battery, the sum of the preset height of the first buffer member and the height of the fixing beam is required to be higher than the height of the bus bar.

In some embodiments, a second buffer (not shown) is provided between the electrical connector and the cover plate 32. The second buffer member is made of an elastic material, so that the impact between the cover plate 32 and the electrical connector is reduced, and noise is reduced.

In some embodiments, the first buffer comprises an insulator and/or the second buffer comprises an insulator. Through making the bolster is the insulating part to when playing the cushioning effect, further improve insulating effect, prevent that apron and electrical connection piece from taking place the short circuit.

As shown in fig. 2 and 3, in some embodiments, the support 331 is provided with a second notch 312, and the second notch 312 is adapted to accommodate a fixing member for fixing the battery pack to an external structure.

The second notch 312 is reserved on the supporting portion 331, so that an installation position can be reserved for the fixing piece, and the battery pack and the frame are convenient to fix. The fixing member may be a screw.

The fixing beam 33 is provided with a box body lifting hole 301 along the gravity direction at a position corresponding to the second notch 312, and the fixing piece is suitable for being fixedly connected with the box body lifting hole 301.

In some embodiments, the battery pack includes at least two fixing beams 33 disposed in parallel, a vertical distance between two adjacent fixing beams 33 is X, and the cover plate 32 has a thickness D, and satisfies: X/D is less than or equal to 100 and less than or equal to 2500.

By limiting the upper limit of the ratio of the vertical distance between two adjacent fixed beams 33 to the thickness of the cover plate 32, the excessive vertical distance between two adjacent fixed beams 33 is avoided, and the fixed beams 33 cannot meet the bearing requirement; by defining the lower limit of the ratio of the vertical distance between the adjacent two fixed beams 33 to the thickness of the cover plate 32, the condition that the energy density is too low due to the too small vertical distance between the adjacent two fixed beams 33 is avoided.

In some embodiments, the thickness of the supporting part 331 is Y, the thickness of the cap plate 32 is D, and the following is satisfied: Y/D is more than or equal to 5 and less than or equal to 150.

By defining an upper limit of the ratio of the thickness of the support portion 331 to the thickness of the cover plate 32, the support portion 331 is prevented from being excessively thick, preventing interference with the clamping tool; by limiting the lower limit of the ratio of the thickness of the supporting portion 331 to the thickness of the cover plate 32, insufficient supporting force caused by too thin supporting portion 331 is avoided, and the supporting portion 331 is prevented from being bent under stress.

According to an embodiment of the present utility model, in another aspect, there is also provided an electric vehicle including: the battery pack 3 as described above; the chassis of the electric vehicle is at least partially the cover plate 32 of the battery pack.

As shown in connection with fig. 1, in some embodiments, the electric vehicle further includes:

a frame 2;

the fixing beam 33 is fixedly connected to the frame 2 via a fixing member 4.

Optionally, the electric automobile further comprises a vehicle body 1, wherein the vehicle body 1 is fixedly connected with the vehicle frame 2, and at least part of the vehicle body 1 is arranged above the vehicle frame 2.

Optionally, a plurality of cover plate lifting holes 321 are formed on the cover plate 32 corresponding to the positions of the box body lifting holes 301 in a penetrating manner, and a plurality of frame lifting holes 201 are formed on the frame 2 correspondingly. The fixing piece 4 is sequentially connected with the frame 2, the cover plate 32 and the fixing beam 33, so as to fix the battery pack.

The electric automobile that this embodiment provided through being in the top of supporting part 331 sets up spacing portion 332 to make the top surface of spacing portion 332 can support the apron 32 of box 31 top, avoid the apron to correspond the regional bearing capacity of fixed beam 33 is relatively poor, prevents that apron 32 from buckling deformation from appearing, improves the life-span of apron 32, and can avoid the electric gap to diminish after the apron 32 warp and even the condition emergence of extrusion battery, the battery can directly participate in the condition of bearing when avoiding the apron to push down, prevents that the battery from being extrudeed the damage, improves the security. Further, the thickness of the stopper 332 is smaller than that of the support 331 in the stacking direction of the cells; and the height of the supporting portion 331 is lower than the height of the battery in the in-box direction of the battery. Thereby be convenient for group battery compression income case, prevent to cause the interference to the centre gripping instrument, make things convenient for the smooth business turn over of centre gripping instrument along the income case direction of battery.

According to an embodiment of the present utility model, in another aspect, there is also provided an electric device, including:

the battery pack comprises an electric equipment body and the battery pack which is arranged on the electric equipment body.

The consumer that this embodiment provided through being in the top of supporting part 331 sets up spacing portion 332 to make the top surface of spacing portion 332 can support the apron 32 of box 31 top, avoid the apron to correspond the regional bearing capacity of fixed beam 33 is relatively poor, prevents that apron 32 from buckling deformation from appearing, improves the life-span of apron 32, and can avoid the electric gap to diminish after the apron 32 warp and even extrude the condition emergence of battery, the battery can directly participate in the condition of bearing when avoiding the apron to push down, prevents that the battery from being extrudeed the damage, improves the security. Further, the thickness of the stopper 332 is smaller than that of the support 331 in the stacking direction of the cells; and the height of the supporting portion 331 is lower than the height of the battery in the in-box direction of the battery. Thereby be convenient for group battery compression income case, prevent to cause the interference to the centre gripping instrument, make things convenient for the smooth business turn over of centre gripping instrument along the income case direction of battery.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Although the embodiments of the present utility model have been described with reference to the accompanying drawings, various modifications and variations may be made by those skilled in the art without departing from the spirit and scope of the utility model, and such modifications and variations fall within the scope of the utility model as defined by the claims.

Claims

1. A battery pack, comprising:

a case (31) in which a battery is provided;

a cover plate (32) which is covered on the box body (31);

a fixed beam (33) provided in the case (31), the fixed beam (33) constituting an abutting unit of at least one side of the battery in the stacking direction; the fixed beam (33) at least comprises a supporting part (331) and a limiting part (332) along the box entering direction of the battery, the supporting part (331) is arranged below the limiting part (332), and the supporting part (331) is suitable for supporting the cover plate (32);

the thickness of the limiting part (332) is smaller than that of the supporting part (331) along the stacking direction of the cells;

the height of the supporting part (331) is lower than the height of the battery along the in-box direction of the battery.

2. The battery pack according to claim 1, wherein an upper surface of the fixing beam (33) directly or indirectly abuts against a lower surface of the cover plate (32).

3. The battery pack according to claim 2, wherein the fixing beam (33) is adapted to divide the battery pack into at least two chambers;

the supporting part (331) is provided with a first notch (311), and/or the supporting part (331) and the frame of the box body (31) are separated to form a first notch (311);

the first indentation (311) is adapted to receive an electrical connector for connecting a battery adjacent the chamber.

4. The battery pack according to claim 2, wherein a first buffer is provided between the upper surface of the fixing beam (33) and the cover plate (32).

5. A battery pack according to claim 3, wherein a second buffer is provided between the electrical connection and the cover plate (32).

6. The battery pack according to claim 4, wherein a sum of a preset height of the first buffer member and a height of the fixing beam (33) is greater than a height of the battery.

7. The battery pack of claim 4 or 5, wherein the first buffer member comprises an insulating member and/or the second buffer member comprises an insulating member.

8. The battery pack according to claim 2, wherein the support portion (331) is provided with a second notch (312), and the second notch (312) is adapted to accommodate a fixing member for fixing the battery pack to an external structure.

9. The battery pack according to any one of claims 2 to 6, wherein the battery pack comprises at least two of the fixing beams (33) arranged in parallel, a vertical distance between two adjacent fixing beams (33) is X, a thickness of the cover plate (32) is D, and the following is satisfied: X/D is less than or equal to 100 and less than or equal to 2500.

10. The battery pack according to any one of claims 2 to 6, wherein the thickness of the support portion (331) is Y, the thickness of the lid plate (32) is D, and the following is satisfied: Y/D is more than or equal to 5 and less than or equal to 150.

11. An electric vehicle comprising a battery pack according to any one of claims 1 to 10; the chassis of the electric automobile is at least partially a cover plate (32) of the battery pack.

12. The electric vehicle of claim 11, characterized in that the electric vehicle further comprises:

a frame (2);

the fixed beam (33) is fixedly connected with the frame (2) through a fixing piece (4).

13. A powered device, comprising:

a powered device body and a battery pack as claimed in any one of claims 1 to 10 disposed on said powered device body.