CN218005186U

CN218005186U - Battery device and vehicle

Info

Publication number: CN218005186U
Application number: CN202221565258.2U
Authority: CN
Inventors: 向涛; 郭冠南; 张露露; 张达
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2022-06-20
Filing date: 2022-06-20
Publication date: 2022-12-09
Anticipated expiration: 2032-06-20

Abstract

The utility model relates to a battery device and vehicle, battery device includes: the battery cell is provided with two first side surfaces which are arranged in a back-to-back manner and two second side surfaces which are arranged in a back-to-back manner, the length size of the first side surfaces is larger than that of the second side surfaces, and the first side surfaces are provided with at least two tabs; the battery cell is arranged in the shell, the shell is provided with two first side plates which are arranged in a back-to-back manner and two second side plates which are arranged in a back-to-back manner, and the length size of each first side plate is larger than that of each second side plate; the first side face is arranged opposite to the first side plate, and the second side face is arranged opposite to the second side plate; the pole posts correspond to the pole lugs one to one, are connected with the pole lugs, stretch out of the outer side of the first side plate, the cross section of each pole post is provided with two oppositely arranged first side edges and two oppositely arranged second side edges, the extending direction of each first side edge is the same as the length direction of the first side face, and the size of each first side edge is larger than that of each second side edge.

Description

Battery device and vehicle

Technical Field

The utility model relates to a battery technology field, more specifically, the utility model relates to a battery device and vehicle.

Background

At present, with the development of related technologies of new energy, the super charging technology has advanced into a new stage of standard establishment and industrial application, so as to solve the problems of 'anxiety of endurance and slow charging' through a new battery technology.

In a conventional battery structure, positions of a pole column, an explosion-proof valve and a liquid injection hole need to be reserved on a side cover plate or a top cover plate of the battery structure. Limited by the structure and the size of the cover plate, the over-flow area of the tab and the pole is small, the heating is high, and the quick charging is limited.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a technical scheme of new battery device and vehicle.

According to the utility model discloses a first aspect provides a battery device, and battery device includes:

the battery cell is provided with two first side surfaces which are arranged in a back-to-back manner and two second side surfaces which are arranged in a back-to-back manner, the length size of the first side surfaces is larger than that of the second side surfaces, and the first side surfaces are provided with at least two tabs;

the battery cell is arranged in the shell, the shell is provided with two first side plates which are arranged in a back-to-back manner and two second side plates which are arranged in a back-to-back manner, and the length size of each first side plate is larger than that of each second side plate;

the first side face is arranged opposite to the first side plate, and the second side face is arranged opposite to the second side plate;

at least two utmost point posts, utmost point post with utmost point ear one-to-one, utmost point post with utmost point ear is connected, utmost point post stretch out in the outside of first curb plate, the cross section of utmost point post has the first side of two relative settings and the second side of two relative settings, the extending direction of first side with the length direction of first side is the same, the size of first side is greater than the size of second side.

Optionally, the cross section of utmost point post is the runway type, the second side is the arc limit, and the cross section of runway type has major diameter and minor diameter, the extending direction of major diameter with the length direction of first side is the same.

Optionally, the size of the short diameter is 2mm to 30mm, and the width of the first side surface is greater than the size of the short diameter.

Optionally, the battery device further includes an explosion-proof valve, and the explosion-proof valve is disposed on the first side plate or the second side plate.

Optionally, the battery device further includes a liquid injection hole, and the liquid injection hole is disposed in the first side plate or the second side plate.

Optionally, the first side plate is provided with an extraction hole, and the pole extends out of the outer side of the first side plate along the extraction hole;

the battery device further comprises an insulating piece, the insulating piece is sleeved on the outer side of the pole, and the insulating piece is located between the pole and the inner wall of the leading-out hole.

Optionally, the battery device further comprises a conductive block, the conductive block is sleeved on the outer side of the pole, and the conductive block is located between the pole and the insulating member.

Optionally, the battery device further includes an electrical connector, the terminal is connected to the tab through the electrical connector, and the electrical connector is stacked to the tab.

Optionally, the length direction of the tab is the same as the length direction of the first side surface, and the length direction of the electrical connector is the same as the length direction of the first side surface.

According to a second aspect of the present invention, there is provided a vehicle including the battery device according to the first aspect.

The utility model discloses a technical effect lies in, through setting up utmost point ear in the bigger first side of length dimension to can increase the size of utmost point ear, and, the relative second side of the size of the first side of utmost point post increases, makes the size of first side be greater than the size of second side, thereby increases the cross sectional dimension of utmost point ear, can increase the flow area of utmost point post and utmost point ear like this, thereby reduces calorific capacity among the charge-discharge process, improves charge-discharge efficiency.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.

Fig. 1 is one of exploded schematic views of a battery device in an embodiment of the present disclosure.

Fig. 2 is a schematic structural diagram of the assembly of the pole, the conductive block and the insulating member in the embodiment of the disclosure.

Fig. 3 is one of schematic perspective structures of a battery device in an embodiment of the present disclosure.

Fig. 4 is one of schematic plan structural views of a battery device in an embodiment of the present disclosure.

Fig. 5 is one of the schematic structural diagrams of a cell of the battery device in the embodiment of the present disclosure.

Fig. 6 is a second schematic structural diagram of a cell of the battery device in the embodiment of the disclosure.

Fig. 7 is a second exploded schematic view of a battery device according to an embodiment of the disclosure.

Fig. 8 is a second schematic perspective view of a battery device according to an embodiment of the disclosure.

Fig. 9 is a second schematic plan view of a battery device according to an embodiment of the present disclosure.

Description of reference numerals:

1. an electric core; 11. a first side surface; 12. a second side surface; 13. a tab; 14. a pole column; 15. an electrical connection;

2. a housing; 21. a first side plate; 210. an exit aperture; 22. a second side plate; 23. an insulating member; 24. a conductive block; 25. an explosion-proof valve; 26. a liquid injection hole; 27. and a liquid injection valve.

Detailed Description

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

Techniques and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be considered a part of the specification where appropriate.

In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

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 discussed further in subsequent figures.

According to an embodiment of the present disclosure, there is provided a battery device, as shown in fig. 1 to 9, including:

the battery cell 1 comprises two first side surfaces 11 arranged oppositely and two second side surfaces 12 arranged oppositely, the length size of the first side surface 11 is larger than that of the second side surfaces 12, and at least two tabs 13 are arranged on the first side surface 11;

the battery cell 1 is arranged inside the casing 2, the casing 2 is provided with two first side plates 21 arranged in an opposite manner and two second side plates 22 arranged in an opposite manner, and the length of each first side plate 21 is greater than that of each second side plate 22;

the first side 11 is disposed opposite to the first side plate 21, and the second side 12 is disposed opposite to the second side plate 22;

at least two utmost point posts 14, utmost point post 14 with utmost point ear 13 one-to-one, utmost point post 14 with utmost point ear 13 is connected, utmost point post 14 stretch out in the outside of first curb plate 21, the cross section of utmost point post 14 has the first side of two relative settings and the second side of two relative settings, the extending direction of first side with the length direction of first side 11 is the same, the size of first side is greater than the size of second side.

In the embodiment of the utility model, through setting up utmost point ear 13 in the bigger first side 11 of length size to can increase utmost point ear 13's size, and, the relative second side of the size of the first side of utmost point post 14 increases, makes the size of first side be greater than the size of second side, thereby increases utmost point ear 13's cross sectional dimension, can increase utmost point post 14 and utmost point ear 13's area of overflowing like this, thereby reduces calorific capacity among the charge-discharge process, improves charge-discharge efficiency.

The battery device is generally a rectangular parallelepiped structure having upper and lower surfaces and four side surfaces. The battery core 1 is also of a cuboid structure, and the shell 2 is also of a cuboid structure. The two first side surfaces 11 and the two second side surfaces 12 of the battery cell 1 correspond to four side surfaces, and the two first side plates 21 and the two second side plates 22 of the casing 2 correspond to four side surfaces.

The first side 11 and the first side plate 21 are disposed opposite to each other and located on the same side. The width direction of the first side surface 11 and the second side surface 12 is the thickness direction of the battery cell 1, and the first side surface 11 is a long side surface. The width direction of the first side plate 21 and the second side plate 22 is the thickness direction of the housing 2, and the first side plate 21 is a long side plate. The longitudinal direction refers to the direction in which the long sides extend, and the width direction refers to the direction in which the short sides extend.

Taking the first side surface 11 as an example, the first side surface 11 is rectangular, the longitudinal direction is the longitudinal direction of the rectangle, and the longitudinal dimension is the dimension of the long side. The width direction is a short side direction of the rectangle, and the width dimension is a dimension of the short side. The longitudinal direction of the first side surface 11 is the same as the longitudinal direction of the first side plate 21.

The battery cell 1 is arranged inside the casing 2, and the battery cell 1 is electrically connected with the pole 14 through the pole ear 13, so that the pole 14 extending out of the first side plate 21 forms an electrode leading-out end of the battery device. The at least two poles 14 at least comprise a positive pole 14 and a negative pole 14, and the pole ear 13 is arranged corresponding to the pole of the pole 14. For example, the positive electrode of the cell 1 is led out to one electrode post 14 through one tab 13, and the negative electrode of the cell 1 is led out to the other electrode post 14 through the other tab 13.

The cross section of the pole column 14 is the cross section of the pole column 14 with the battery core 1 extending out of the first side plate 21 in the extending direction, and the extending direction is perpendicular to the section of the cross section.

The tab 13 is provided on the first side surface 11 having a large length, and the post 14 is led out from the tab 13 to the first side plate 21. This enables a larger space for arranging the tab 13 and the post 14 to increase the size of the tab 13 and the post 14 in the cross section of the post 14. For example, the cross-sectional area of the pole 14 is increased, and the area of the tab 13 is increased in the cross-sectional direction the same as the cross-sectional direction of the pole 14, so that the flow area of the battery cell 1 on the tab 13 and the pole 14 can be effectively increased, the heat productivity in the charging and discharging process is reduced, and the charging and discharging efficiency is improved.

Optionally, the utility model discloses well battery device is the blade battery.

Alternatively, as shown in fig. 1, 3-6, at least two tabs 13 are disposed on the same first side 11, and the poles 14 protrude from the same first side plate 21. This can improve the compactness of structure, reduce the space that the battery device took up.

For example, the plurality of poles 14 are arranged in sequence outside the first side plate 21.

Alternatively, as shown in fig. 7 to 9, a plurality of poles 14 protrude from the first side plate 21 on both sides of the battery device, and the poles extend from the corresponding first side surface 11. And a tab 13 and an electric connector 15 are arranged on the first side surface 11 of the two sides of the battery cell 1 corresponding to the pole 14.

In one embodiment, as shown in fig. 2, the cross section of the pole post 14 is a runway shape, the second side edge is an arc-shaped edge, and the cross section of the runway shape has a long diameter and a short diameter, and the long diameter extends in the same direction as the length direction of the first side surface 11.

In the disclosed embodiment, the short side of the pole 14 is arc-shaped, forming a racetrack-shaped cross-section. The major axis of the racetrack cross section is the same as the length direction of the first side surface 11, so that the pole 14 can be arranged to have a larger major axis dimension, and the flow area of the pole 14 is increased.

The minor diameter of utmost point post 14 is the same with the width direction of first side 11, and utmost point post 14 is drawn forth by utmost point ear 13 that sets up on first side 11, and first side 11 can provide the bigger size space in the length direction to increase the cross section of utmost point post 14, thereby improve the area of overflowing.

For example, the dimension of the short diameter is smaller than the width dimension of the first side surface 11, and the cross-sectional dimension of the pole 14 is set according to different battery devices. The long diameter may increase in size depending on the available space.

Optionally, the first side edge is parallel to an edge of the first side 11, and the major diameter of the racetrack cross-section coincides with the centerline of the first side 11 on the first side 11.

In one embodiment, the short diameter is 2mm to 30mm in size, and the width of the first side surface 11 is greater than the short diameter.

In the embodiment of the present disclosure, the short diameter dimension and the structural strength of the pole 14 are ensured, and the requirement of the pole 14 on the cross section dimension can be met under the dimension matching with the long diameter dimension, so as to meet the purpose of increasing the flow area.

For example, if the thickness of the battery cell 1 is set to 10mm to 40mm, the width of the first side surface 11 is 10mm to 40mm. The width dimension of the first side surface 11 is larger than the short diameter dimension, and the short diameter dimension is set correspondingly.

In one embodiment, as shown in fig. 1 and 7, the battery device further includes an explosion-proof valve 25, and the explosion-proof valve 25 is disposed on the first side plate 21 or the second side plate 22.

In the embodiment of the present disclosure, the explosion-proof valve 25 is disposed on the first side plate 21 or the second side plate 22 for explosion-proof of the battery device.

For example, the explosion-proof valve 25 is arranged on the second side plate 22, so that the explosion-proof valve 25 is prevented from occupying the space on one side of the second side plate 22, more space is reserved for arranging the tab 13 and the pole 14, the size of the tab 13 and the pole 14 can be increased, and a higher flow area is guaranteed.

For example, when the requirement of the flow area is met, the explosion-proof valve 25 is arranged on the first side plate 21 without occupying the space between the tab 13 and the post 14, so that the compactness of the structure is improved, and the space utilization rate of the battery device is improved.

In one embodiment, as shown in fig. 1 and 7, the battery device further includes a liquid injection hole 26, and the liquid injection hole 26 is provided in the first side plate 21 or the second side plate 22.

In the disclosed embodiment, the injection hole 26 is used for injecting electrolyte into the case 2. The liquid pouring hole 26 can be selectively provided in the first side plate 21 or the second side plate 22 depending on the space of the first side plate 21. For example, when there is sufficient space for providing the electrode post 14 and the tab 13, the injection hole 26 is provided in the first side plate 21 to improve the compactness.

For example, a filling valve 27 is provided in the filling hole 26, and the filling valve 27 is sealed by being fitted to the filling hole 26. The pour hole 26 can be opened or closed by attaching or detaching the pour valve 27.

In one embodiment, as shown in fig. 1, the first side plate 21 is provided with an extraction hole 210, and the pole 14 protrudes outside the first side plate 21 along the extraction hole 210;

the battery device further comprises an insulating piece 23, the insulating piece 23 is sleeved on the outer side of the pole post 14, and the insulating piece 23 is located between the pole post 14 and the inner wall of the leading-out hole 210.

In the embodiment of the present disclosure, the insulating member 23 is disposed to form insulation between the housing 2 and the terminal 14, so as to prevent the terminal 14 from being short-circuited after being conducted with the housing 2, thereby improving the safety of the battery device.

In one embodiment, as shown in fig. 2, the battery device further includes a conductive block 24, the conductive block 24 is sleeved outside the pole post 14, and the conductive block 24 is located between the pole post 14 and the insulating member 23.

In the embodiment of the present disclosure, the conductive block 24 is sleeved on the pole post 14, the conductive block 24 is conducted with the pole post 14, and the insulating member 23 forms insulation between the conductive block 24 and the housing 2. The conductive block 24 can increase the area of the connection region where the corresponding pole 14 is connected to the outside of the housing 2, so that the pole 14 can be more easily electrically connected to an external circuit.

Optionally, the conductive block 24 protrudes from the pole 14 in a direction from the inner side to the outer side of the first side plate 21 of the battery device. Therefore, the structural area of the conductive block 24 connected with an external structure can be increased, and the loss caused by direct welding of the pole 14 in circuit connection is avoided. For example, the conductive block 24 is detachably provided between the pole 14 and the insulating member 23. The conductive block 24 is removed for replacement, thereby improving the service life of the battery device.

In one embodiment, as shown in fig. 1, the battery device further includes an electrical connector 15, the terminal 14 is connected to the tab 13 through the electrical connector 15, and the electrical connector 15 and the tab 13 are stacked.

In the embodiment of the present disclosure, the electrical connection member 15 is provided between the tab 13 and the post 14. For example, the electric connector 15 and the tab 13 are stacked, one end surface of the pole 14 abuts against and is connected to the electric connector 15, and the other end surface of the pole 14 protrudes from the first side plate 21.

The electric connector 15 and the tab 13 are arranged in a laminated mode, so that the connection area is increased, the electric connector 15 improves the connection strength of the pole 14 and the tab 13, and connection is facilitated. For example, the electrical connection members 15 are connected to the pole posts 14 and the tab 13, respectively. After the electric connector 15 is welded with the pole 14, the electric connector 15 is connected with the pole ear 13.

Optionally, the electrical connector 15 has a recessed groove into which the pole 14 is inserted. The caulking groove is located electric connector 15's orientation one side of utmost point post 13, electric connector 15 with one side that the caulking groove carried on the back mutually has first arcwall face, utmost point ear 13 with one side that electric connector 15 contacted has the second arcwall face, first arcwall face with the structure of second arcwall face is the same, first arcwall face with the laminating of second arcwall face.

Can improve the structural stability that utmost point post 14 and electric connector 15 are connected like this to and improve the structural stability of being connected of electric connector 15 and utmost point ear 13, improved electric core 1 and the stability of being connected through the electricity of utmost point post 14 with external circuit, avoid appearing the problem that the overcurrent area that short circuit or contact failure lead to reduces.

In one embodiment, as shown in fig. 1 and 7, the length direction of the tab 13 is the same as the length direction of the first side surface 11, and the length direction of the electrical connector 15 is the same as the length direction of the first side surface 11.

In the embodiment of the present disclosure, the electrical connection member 15 and the tab 13 have the same length direction as the first side surface 11. This makes it possible to increase the size of the tab 13 and the electrical connection member 15 in the longitudinal direction by using the longitudinal space of the first side surface 11, thereby making it possible to increase the flow area.

For example, the length of the first side surface 11 is larger than that of the second side surface 12, and the size of the tab 13, the electrical connector 15 and the pole 14 in the length direction is increased by using the space of the length of the first side surface 11, so that the increased current passes through the overcurrent area of the tab 13, the electrical connector 15 and the pole 14, the heat generation amount in the charging and discharging process is reduced, and the charging and discharging efficiency is improved.

According to an embodiment of the present disclosure, there is provided a vehicle including the battery device according to any one of the embodiments of the present disclosure.

The vehicle has larger overcurrent area in the charging and discharging process, reduces the heat productivity in the charging and discharging process, and improves the charging and discharging efficiency of the vehicle.

In the above embodiments, the differences between the embodiments are described in emphasis, and different optimization features between the embodiments can be combined to form a better embodiment as long as the differences are not contradictory, and further description is omitted here in consideration of brevity of the text.

Although some specific embodiments of the present invention have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. A battery device, comprising:

2. The battery device according to claim 1, wherein the cross section of the pole is a racetrack type, the second side is an arc-shaped side, the racetrack type cross section has a long diameter and a short diameter, and the extension direction of the long diameter is the same as the length direction of the first side surface.

3. The battery device according to claim 2, wherein the short diameter has a dimension of 2mm to 30mm, and the width dimension of the first side surface is larger than the short diameter.

4. The battery device according to claim 1, further comprising an explosion-proof valve provided at the first side plate or the second side plate.

5. The battery device according to claim 1, further comprising a liquid injection hole provided in the first side plate or the second side plate.

6. The battery device according to claim 1, wherein the first side plate is provided with an extraction hole, and the pole extends out of the outer side of the first side plate along the extraction hole;

the battery device further comprises an insulating part, the insulating part is sleeved on the outer side of the pole, and the insulating part is located between the pole and the inner wall of the leading-out hole.

7. The battery device according to claim 6, further comprising a conductive block, wherein the conductive block is sleeved outside the pole, and the conductive block is located between the pole and the insulating member.

8. The battery device of claim 1, further comprising an electrical connector, wherein the terminal post is connected to the tab via the electrical connector, and wherein the electrical connector is stacked with the tab.

9. The battery device according to claim 8, wherein the tab has a length in the same direction as the first side surface, and the electrical connector has a length in the same direction as the first side surface.

10. A vehicle characterized by comprising a battery device according to any one of claims 1-9.