CN214203884U

CN214203884U - Battery pack and electric device

Info

Publication number: CN214203884U
Application number: CN202120469596.5U
Authority: CN
Inventors: 兰天保; 胡传鹏
Original assignee: Dongguan Poweramp Technology Ltd
Current assignee: Dongguan Poweramp Technology Ltd
Priority date: 2021-03-04
Filing date: 2021-03-04
Publication date: 2021-09-14
Anticipated expiration: 2031-03-04

Abstract

The application provides a battery pack, including casing and explosion-proof valve, explosion-proof valve locates the casing, just explosion-proof valve includes body, diaphragm and insulating piece, and the body is equipped with the first region, along first direction, the first region is including the first recess and the second recess that set gradually, part second recess and first recess intercommunication, the second recess is equipped with the through-hole, the through-hole runs through the body, along the second direction, the second recess extends to the edge of body, first direction perpendicular to second direction, the second recess is located to the diaphragm, and cover the through-hole, be equipped with the bleeder vent on the diaphragm, first recess is located to the insulating piece, and cover the second recess, be equipped with the clearance between diaphragm and the insulating piece, clearance and bleeder vent intercommunication through-hole and outside. The application still provides an electric installation, through adopting foretell battery package, can solve the battery at the unbalanced problem of charge-discharge in-process atmospheric pressure, reduces the battery and appears the safety problem.

Description

Battery pack and electric device

Technical Field

The application relates to the technical field of battery manufacturing, in particular to a battery pack and an electric device.

Background

On the current battery, in order to solve the battery at the in-process of charging and discharging, inside atmospheric pressure and outside atmospheric pressure are different and the safety problem probably appears, the mode of adopting usually chooses for use explosion-proof breather valve, reserves the mounted position on the battery product, installs explosion-proof breather valve to the battery. However, the explosion-proof vent valve is high in cost and large in size, and occupies a large space when being mounted on a battery, so that the explosion-proof vent valve cannot be used for the battery with a compact structure.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is desirable to provide a battery pack and an electric device, which are capable of reducing the overall cost of the battery and eliminating the need for an explosion-proof valve to occupy more space of the battery pack.

The embodiment of the application provides a battery pack, including casing and explosion-proof valve, explosion-proof valve locates the casing, just explosion-proof valve includes body, diaphragm and insulating piece, and the body is equipped with first region, along first direction, first region is including the first recess and the second recess that set gradually, part second recess and first recess intercommunication, the second recess is equipped with the through-hole, the through-hole runs through the body, along the second direction, the second recess extends to the edge of body, first direction perpendicular to second direction, the second recess is located to the diaphragm, and cover the through-hole, be equipped with the bleeder vent on the diaphragm, first recess is located to the insulating piece, and cover the second recess, be equipped with the clearance between diaphragm and the insulating piece, clearance and bleeder vent intercommunication through-hole and outside. The explosion-proof valve is arranged on the shell, so that the explosion-proof valve is not required to be arranged in a separate reserved space, the structure of the battery pack is simplified, and the size of the battery pack is reduced.

In a possible implementation manner, the explosion-proof valve further includes a stopping portion, and the stopping portion is disposed at the second groove position and used for stopping the diaphragm. Through setting up backstop portion, can restrict the diaphragm and remove, avoid influencing explosion-proof valve's exhaust effect.

In one possible implementation, the housing includes a first surface, and a distance between the stopper portion and the first surface in the first direction is equal to a distance between a bottom surface of the first groove and the first surface. Along the first direction, the distance between the stopping part and the first groove is the same, so that the problem of interference caused by the fact that the distance between the stopping part and the first groove is too high in the subsequent assembly process can be avoided.

In a possible implementation manner, the housing comprises a first housing part and a second housing part connected with the first housing part, and the explosion-proof valve is arranged on the first housing part;

the first shell comprises a top wall and a plurality of first side walls, the first side walls and the top wall form an accommodating space, the explosion-proof valve is arranged on the top wall, the through hole is communicated with the accommodating space and the second groove, and the second groove extends to the first side walls. The through hole communicates accommodating space and the second groove, so that the inside and the outside of the battery pack are communicated, the second groove extends to the first side wall, an exhaust channel is formed in the first shell, and the internal and external air pressure of the battery pack can be adjusted by the explosion-proof valve.

In a possible implementation manner, a fixing portion is disposed on the first side wall, and the first shell portion is fixed to the second shell portion through the fixing portion.

In a possible implementation manner, the battery pack further includes a connecting member, the connecting member is rotatably disposed on the first side wall, the first side wall and the fixing portion form a containing groove, and the containing groove can contain the connecting member.

In a possible implementation manner, when the connecting member is located in the accommodating groove, a distance between the connecting member and the first surface along the first direction is smaller than a distance between a bottom surface of the second groove and the first surface. So set up, can avoid the connecting piece to block the clearance between insulating piece and the diaphragm, and the explosion-proof valve of backstop exhausts, and simultaneously, the connecting piece can backstop partial liquid and get into the battery package.

In one possible implementation, the membrane comprises a waterproof structure.

In a possible implementation manner, the body is integrally formed with the housing or the body is detachably provided to the housing.

An embodiment of the present application further provides an electric device, including any one of the above battery packs.

The application provides a battery package and power consumption device, through locating the explosion-proof valve on the casing, set up first recess and second recess on the body of explosion-proof valve, and the second recess still is equipped with the through-hole, make the diaphragm cover the through-hole, and be equipped with the bleeder vent on the diaphragm, make again and leave the clearance between the insulating piece of locating first groove and the diaphragm, communicate through clearance and bleeder vent with through-hole and outside, so that the battery package is inside can exhaust, guarantee that the atmospheric pressure of battery package can maintain balance, promote the security of battery package.

Drawings

Fig. 1 is a schematic perspective view of a battery pack according to an embodiment of the present application.

Fig. 2 is a schematic perspective view of a first shell portion according to an embodiment of the present application.

Fig. 3 is a perspective view illustrating the first shell portion shown in fig. 2 without a connector.

Fig. 4 is a schematic cross-sectional view of the first shell portion along a-a direction shown in fig. 2.

Fig. 5 is a schematic cross-sectional view of the first shell portion illustrated in fig. 2 taken at another view angle in a-a direction.

Fig. 6 is a front view of the first shell portion shown in fig. 2.

Description of the main elements

Battery pack 001

Case 100

First shell part 10

First surface 11

First side wall 12

Fixing part 121

Fixing hole 122

Top wall 13

Connecting piece 14

Accommodation groove 15

The second shell part 20

Second side wall 21

Bottom wall 22

Explosion-proof valve 300

First region 30

First recess 31

Second groove 32

Through hole 321

Diaphragm 33

Insulating sheet 34

Gap 35

Stop 36

First surface 361

Second side 362

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present. The terms "top," "bottom," "upper," "lower," "left," "right," "front," "rear," and the like as used herein are for illustrative purposes only.

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 application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

The embodiment of the application provides a battery pack, including casing and explosion-proof valve, explosion-proof valve locates the casing, just explosion-proof valve includes body, diaphragm and insulating piece, and the body is equipped with first region, along first direction, first region is including the first recess and the second recess that set gradually, part second recess and first recess intercommunication, the second recess is equipped with the through-hole, the through-hole runs through the body, along the second direction, the second recess extends to the edge of body, first direction perpendicular to second direction, the second recess is located to the diaphragm, and cover the through-hole, be equipped with the bleeder vent on the diaphragm, first recess is located to the insulating piece, and cover the second recess, be equipped with the clearance between diaphragm and the insulating piece, clearance and bleeder vent intercommunication through-hole and outside.

Through adopting foretell battery package, through locating the explosion-proof valve on the casing, reduce the shared space of explosion-proof valve, set up first recess and second recess on the body of explosion-proof valve, and the second recess still is equipped with the through-hole, makes the diaphragm cover the through-hole, and is equipped with the bleeder vent on the diaphragm, makes again to leave the clearance between the insulating piece of locating first groove and the diaphragm, communicates through-hole and outside through clearance and bleeder vent. When the inside atmospheric pressure of battery package is too high, gaseous accessible through-hole and clearance discharge outside the battery package, guarantee that the atmospheric pressure of battery package can maintain balanced, promote the security of battery package.

Some embodiments will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

Referring to fig. 1, an embodiment of the present application provides a battery pack 001, including a casing 100, an explosion-proof valve 300, and a battery cell module (not shown), where the battery cell module is accommodated inside the casing 100, the casing 100 is used to protect the battery cell module, the explosion-proof valve 300 is disposed in the casing 100 and is used to communicate the inside of the casing 100 with the outside, and when the battery cell module is charging and discharging, air pressure inside the battery pack 001 changes, and the air pressure is adjusted by the explosion-proof valve 300, so as to reduce a situation that the air pressure of the battery pack 001 is unbalanced and a dangerous situation that may be caused in an extreme situation during the charging and discharging process.

For better illustration of the battery pack 001, it will be described below with reference to the X, Y, Z axis, wherein the X, Y, Z axis is perpendicular two by two. The battery cell module comprises a plurality of battery cells stacked along a first direction, and the battery cells are connected with one another and used for supplying power to a power utilization device. In an embodiment, electric core is the laminate polymer core, connects between a plurality of laminate polymer cores to form electric core module is comparatively common in current battery manufacturing, here, no longer gives unnecessary details. Preferably, the first direction is along the Z-axis.

The case 100 includes a first case portion 10 and a second case portion 20, and the first case portion 10 is fixed to the second case portion 20 by a fastener, such as a screw. The explosion-proof valve 300 is disposed in the first casing portion 10, and the battery cell module is accommodated in the second casing portion 20.

In an embodiment, the first casing part 10 is an upper cover of the battery pack 001, and covers the second casing part 20 to protect a battery cell module disposed in the second casing part 20, so as to reduce impurities or liquid and the like from entering therein.

Referring to fig. 2 and 3, the first shell portion 10 includes a first surface 11, and the first surface 11 is a surface of the first shell portion 10 facing away from the second shell portion 20.

Preferably, the first shell portion 10 includes a top wall 13 and a plurality of first side walls 12, and the first side walls 12 are disposed on a peripheral side of the top wall 13 and form an accommodating space with the top wall 13. In an embodiment, the top wall 13 is provided with four first side walls 12, and the four first side walls 12 are respectively disposed perpendicular to the top wall.

The first side wall 12 is provided with a fixing portion 121, and the first shell portion 10 is fixed on the second shell portion 20 through the fixing portion 121. Specifically, the fixing portion 121 extends from an end of the first side wall 12 away from the top wall 13, and further, the fixing portion 121 extends towards the X axis and the Y axis respectively by a preset distance. The fixing portion 121 is provided with a fixing hole 122, and when the first shell portion 10 is connected to the second shell portion 20, a fastener, such as a screw, is disposed at the fixing hole 122 to lock the first shell portion 10 and the second shell portion 20, so as to protect the battery cell module.

In one embodiment, the top wall 13 and the first side wall 12 may be a unitary structure.

Preferably, the explosion-proof valve 300 is provided on the top wall 13.

Referring to fig. 2, the battery pack 001 further includes a connecting member 14, the connecting member 14 is rotatably disposed on the first sidewall 12, a receiving groove 15 is formed between the first sidewall 12 and the fixing portion 121, and the connecting member 14 can be received in the receiving groove 15. Specifically, a substantially U-shaped connecting member 14 is disposed on the first housing portion 10, the connecting member 14 is rotatably connected to the first sidewall 12, and an operator can conveniently move the battery pack 001 through the connecting member 14. Will connecting piece 14 is located storage tank 15 department avoids connecting piece 14 need occupy other spaces of battery package, makes battery package 001 overall structure is compacter, reduces its whole volume.

The second shell portion 20 includes four second side walls 21 connected to each other, the four second side walls 21 enclose to form a middle frame structure with openings (not shown) at two ends, the four second side walls 21 form an accommodating space (not shown), the battery cell module is disposed in the accommodating space, and the first shell portion 10 is used for closing the openings. Preferably, the four second side walls 21 may be of an integrally formed structure, such as an aluminum extrusion process. It will be appreciated that in other embodiments, the four second side walls 21 can be fixedly connected in a detachable manner, and the second shell portion 20 can also include a bottom wall 22 disposed at one of the openings.

The first side walls 12 correspond to four second side walls 21 of the second shell portion 20, respectively, to form an integral structure when the first and

second shell portions

10 and 20 are coupled.

The explosion-proof valve 300 comprises a body, a diaphragm 33 and an insulating sheet 34, wherein the diaphragm 33 and the insulating sheet 34 are arranged on the body. Preferably, the body is a part of the first housing part 10, and further, the body of the explosion-proof valve 300 is directly formed on the first housing part 10, so that the explosion-proof valve 300 and the housing 100 form a whole, the cost of the battery pack 001 is reduced, the structure of the battery pack 001 is also simplified, and the explosion-proof valve 300 is prevented from occupying more space of the housing 100.

It is understood that, in other embodiments, the body may be detachably disposed with the first shell portion 10, for example, the body is disposed on the first shell portion 10 in an embedded manner, and the structure of the housing 100 may also be simplified.

Referring to fig. 2 and 3, the body is provided with a first area 30, the first area 30 includes a first groove 31 and a second groove 32 sequentially arranged along a first direction, and at least a portion of the second groove 32 is communicated with the first groove 31. Preferably, in this embodiment, the first groove 31 is formed by recessing the first surface 11 at the first region 30, and the second groove 32 is formed by recessing the bottom of the first groove 31, so that the first groove 31 and the second groove 32 are stepped.

Preferably, the first region 30 is a partial region of the body on the first surface 11. It is understood that in other embodiments, the first region 30 may be the entire region of the first surface 11. In this embodiment, the first groove 31 is disposed substantially at a middle position of the first shell portion 10 and extends toward an edge position of the first shell portion 10, and further, the "edge" is a portion of the body along an edge. The first recess 31 is substantially rectangular, wherein "substantially" means that it looks like, but not absolutely rectangular.

It is understood that, in other embodiments, the disposition position and shape of the first groove 31 are not limited thereto, and for example, the first groove 31 may be disposed at an intermediate position of the first shell portion 10 and the first groove 31 may be disposed in a circular shape.

The second groove 32 is provided with a through hole 321, and the through hole 321 penetrates through the body along the first direction and communicates the accommodating space formed by the first shell 10 and the first side wall 12 with the second groove 32. Further, the through hole 321 is a circular hole. Preferably, the second groove 32 extends to and through an edge of the body in the second direction, and further, the second groove 32 extends to the first sidewall 12 of the first shell portion 10. The second groove 32 is recessed downward from the first direction by a predetermined distance, a part of the second groove 32 is communicated with the first groove 31, and another part of the second groove 32 extends to the position along the edge of the body, so that a similar step-like structure is directly formed between the first surface 11 and the second groove 32. Further, the first direction is perpendicular to the second direction.

Preferably, the second direction is along the X-axis. It is understood that in other embodiments, the shape of the through hole 321 is not limited thereto, and may be replaced by a square hole, for example.

Referring to fig. 4 and 5, the diaphragm 33 is disposed in the second groove 32 and covers the through hole 321. The membrane 33 is provided with a vent (not shown) which is communicated with the through hole 321, so that the air inside the second shell portion 20 can smoothly flow out of the through hole 321 and the vent. Preferably, the membrane 33 includes a waterproof material, so as to reduce the situation that external liquid, such as water, flows from the air vent to the through hole 321 and enters the second shell portion 20, and damages a cell module disposed in the second shell portion 20.

Referring to fig. 1, 4 and 5, the insulation sheet 34 is disposed in the first groove 31 and covers the second groove 32. Preferably, the insulation sheet 34 covers the first groove 31, and further, the insulation sheet 34 covers the first groove 31 completely, so as to reduce the possibility that impurities such as dust fall into the first groove 31 in the process of long-term use, and then enter the second groove 32 through the first groove 31, thereby blocking the air holes on the membrane 33.

Preferably, the insulation sheet 34 is a label on which information about the battery pack 001, such as the type of the battery pack 001, some general data, and the like, can be written, which is convenient for a user to distinguish.

It is understood that in other embodiments, the insulating sheet 34 is not limited to the above-mentioned labels, and other structures with equivalent functions or functions may be substituted.

Referring to fig. 4 and 5, preferably, the first groove 31 is recessed from the first surface 11 by a predetermined distance in the Z-axis direction, the second groove 32 is recessed from the bottom surface of the first groove 31 by another predetermined distance in the Z-axis direction, and when the insulating sheet 34 and the diaphragm 33 are respectively disposed in the first groove 31 and the second groove 32, a gap 35 is disposed in front of the insulating sheet 34 and the diaphragm 33, and the gap 35 and the air holes communicate the through hole 321 with the outside, so that gas generated inside the second shell portion 20 can be discharged.

Referring to fig. 2 and 3, in an embodiment, the explosion-proof valve 300 further includes a stopper 36. Preferably, the stopper 36 is disposed at the second groove 32 for stopping the diaphragm 33. Specifically, the stopper 36 is a substantially convex block extending from the bottom surface of the second groove 32 in a direction opposite to the Z-axis by a predetermined distance to limit the movement of the diaphragm 33 from the second groove 32 in the X-direction.

Preferably, the blocking portion 36 includes a first surface 361 and a second surface 362, and the first surface 361 is closer to the bottom surface of the second groove 32 than the second surface 362 is. The first surface 361 is substantially in the same plane as the bottom surface of the first groove 31, the distance between the first surface 361 of the stopping portion 36 and the first surface 11 is equal to the distance between the bottom surface of the first groove 31 and the first surface 11, the stopping portion 36 limits the movement of the diaphragm 33, in addition, the stopping portion 36 supports the insulation sheet 34, limits the downward depression of the insulation sheet 34, and reduces the influence of the insulation sheet 34 on the gap 35 on the exhaust. Further, the second surface 362 is substantially in the same plane as the first surface 11, and also functions as a stopper for the insulating sheet 34.

It is understood that when the insulating sheet 34 has a greater hardness, the stopping portion 36 may be eliminated with a step-like structure, and only the diaphragm 33 may be stopped.

In this embodiment, the second groove 32 is provided with two stopping portions 36, and there is a gap between the two stopping portions 36, so that the gap 35 between the insulating sheet 34 and the diaphragm 33 forms a plurality of channels. It will be appreciated that the number of stops 36 is not limited thereto, and in other embodiments, for example, one or other numbers may be substituted.

Referring to fig. 2 and 6, preferably, in the Z-axis direction, a distance between the connecting member 14 and the first surface 11 is smaller than a distance between a bottom surface of the second groove 32 and the first surface 11, so that the connecting member 14 is prevented from blocking the gap 35 between the insulating sheet 34 and the diaphragm 33 when being accommodated in the accommodating groove 15, and the explosion-proof valve 300 is stopped to exhaust air. Meanwhile, the first region 30 is disposed at a position close to the connecting member 14, and when the connecting member 14 is accommodated in the accommodating groove 15, the connecting member 14 can stop a part of liquid, such as water, so that the space utilization rate and the safety of the battery pack 001 are improved.

Embodiments of the present application also provide an electric device (not shown) including a body (not shown) and a battery pack 001 housed in the body. The battery pack 001 is used for supplying power to the body so that the power consumption device can operate. The battery pack 001 in the electric device is the battery pack 001 in any of the above embodiments, so that all the advantages of the battery pack 001 are achieved, and further description is omitted here.

The electric device can be an electric vehicle or an electric bicycle, and correspondingly, the body is of an electric vehicle body structure or a bicycle body structure. It is to be understood that the power utilization device is not limited thereto, and for example, may be a cleaning device or the like.

In summary, the battery pack 001 provided in the embodiment of the present application, through locating the explosion-proof valve 300 on the casing 100, the explosion-proof valve 300 is in the body is provided with the first groove 31 and the second groove 32, and makes the second groove 32 extend to the edge of the body, when the insulating sheet 34 and the diaphragm 33 are respectively located on the first groove 31 and the second groove 32, the gap 35 is formed between the insulating sheet 34 and the diaphragm 33, the gap 35 is an exhaust channel of the explosion-proof valve 300, and the channel is communicated with the inside of the casing 100 through the through hole 321, so that the gas generated by the battery cell module can be exhausted, and the balance of the internal and external gas pressures of the battery pack 001 is improved. By adopting the battery pack 001, the cost is reduced, and the structure is simpler and more convenient. The battery pack 001 can be used in electric devices such as electric vehicles and electric bicycles to provide electric power for the electric vehicles and the electric bicycles. It is to be understood that the applicable device of the battery pack 001 is not limited thereto.

In addition, those skilled in the art should realize that the above embodiments are illustrative only and not limiting to the present application, and that suitable changes and modifications to the above embodiments are within the scope of the disclosure of the present application as long as they are within the true spirit and scope of the present application.

Claims

1. The utility model provides a battery pack, includes the casing and locates the electric core module of casing, a serial communication port, battery pack still includes explosion-proof valve, explosion-proof valve is located the casing, just explosion-proof valve includes:

the body is provided with a first area, the first area comprises a first groove and a second groove which are sequentially arranged along a first direction, part of the second groove is communicated with the first groove, the second groove is provided with a through hole, the through hole penetrates through the body, the second groove extends to the edge of the body along a second direction, and the first direction is perpendicular to the second direction;

the membrane is arranged in the second groove and covers the through hole, and the membrane is provided with an air hole;

the insulating sheet is arranged in the first groove and covers the second groove;

the diaphragm with be equipped with the clearance between the insulating piece, the clearance with the bleeder vent intercommunication through-hole and outside.

2. The battery pack of claim 1, wherein the explosion-proof valve further comprises a stopper disposed at the second groove position for stopping the diaphragm.

3. The battery pack of claim 2, wherein the housing includes a first surface, and a distance between the stopper and the first surface in the first direction is equal to a distance between a bottom surface of the first groove and the first surface.

4. The battery pack according to claim 3, wherein the case includes a first case portion and a second case portion connected to the first case portion, and the explosion-proof valve is provided at the first case portion;

the first shell comprises a top wall and a plurality of first side walls, the first side walls and the top wall form an accommodating space, the explosion-proof valve is arranged on the top wall, the through hole is communicated with the accommodating space and the second groove, and the second groove extends to the first side walls.

5. The battery pack according to claim 4, wherein a fixing portion is provided on the first sidewall, and the first case portion is fixed to the second case portion by the fixing portion.

6. The battery pack of claim 5, further comprising a connector rotatably disposed on the first sidewall, wherein the first sidewall and the fixing portion form a receiving groove capable of receiving the connector.

7. The battery pack according to claim 6, wherein when the connecting member is located in the receiving groove, a distance between the connecting member and the first surface in the first direction is smaller than a distance between a bottom surface of the second groove and the first surface.

8. The battery pack of claim 1, wherein the membrane comprises a waterproof structure.

9. The battery pack of claim 1, wherein the body is integrally formed with the housing or the body is removably attached to the housing.

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