CN211828974U

CN211828974U - Lower box body of power battery, power battery and vehicle

Info

Publication number: CN211828974U
Application number: CN202022133138.2U
Authority: CN
Inventors: 安益路
Original assignee: Evergrande New Energy Automobile Investment Holding Group Co Ltd
Current assignee: Evergrande New Energy Automobile Investment Holding Group Co Ltd
Priority date: 2020-09-25
Filing date: 2020-09-25
Publication date: 2020-10-30
Anticipated expiration: 2030-09-25

Abstract

The utility model relates to a new energy automobile field discloses a power battery's lower box, power battery and vehicle, power battery's lower box includes casing portion (10), transparent (21) and location portion, be formed with through-hole (11) on casing portion (10), location portion can be right transparent (21) are fixed a position in order to seal through-hole (11), just the inside of casing portion (10) can pass through-hole (11) with transparent (21) are observed. The application provides a lower box of power battery can judge whether coolant liquid has taken place and has leaked under the condition of not taking apart power battery's battery package, if take place to leak and can in time take corresponding measure, effectively reduces because of coolant liquid leaks the safety risk that causes the battery thermal runaway.

Description

Lower box body of power battery, power battery and vehicle

Technical Field

The utility model relates to a new energy automobile technical field specifically relates to a power battery's lower box, power battery and vehicle.

Background

In the new energy automobile technology, the ratio of the liquid cooling method to the cooling method of the power battery is increased year by year and becomes the current mainstream technical scheme. Because reasons such as detection error, product uniformity, spare part ageing and driving operating mode still have the risk of sealing failure, in case take place sealing failure coolant liquid just can take place to leak.

After the cooling liquid leaks in the battery pack, if the cooling liquid is small in amount, the battery system is generally not damaged; when the leakage amount is increased, the service performance of the battery is influenced, corrosion is caused to components in the system, the aging of the components is accelerated, when the leakage amount is large to a certain degree, the leaked cooling liquid forms short circuit to circuits in the battery pack, so that thermal runaway of the battery is caused, irreversible damage is caused to a vehicle, and even life safety of a user is threatened.

The internal space of the battery pack is a closed system, and the leakage of the cooling liquid can be detected only by disassembling the battery pack. When a vehicle breaks down, whether the vehicle is caused by leakage of the cooling liquid or not can not be judged on the premise of not unpacking, and unpacking inspection is complicated and high in cost.

SUMMERY OF THE UTILITY MODEL

The utility model provides a lower box of power battery, power battery and car in order to overcome the problem that whether can't judge the coolant liquid of battery package and leak under the prerequisite of not unpacking that prior art exists.

In order to achieve the above object, an aspect of the present invention provides a lower box of a power battery, the lower box of the power battery includes a box portion, a transparent member and a positioning portion, a through hole is formed on the box portion, the positioning portion can be right the transparent member is positioned to seal the through hole, and the inside of the box portion can pass through the through hole and the transparent member is observed.

Through above-mentioned technical scheme, location portion can be fixed a position the transparent at the position of through-hole and make the transparent seal the through-hole for the user can observe the inside condition of box through transparent and through-hole, thereby judges whether there is the coolant liquid in the box, if there is the coolant liquid then judge to take place the coolant liquid and leak, needs to maintain the car. The application provides a lower box of power battery can judge whether coolant liquid has taken place and has leaked under the condition of not taking apart power battery's battery package, if take place to leak and can in time take corresponding measure, effectively reduces because of coolant liquid leaks the safety risk that causes the battery thermal runaway.

Optionally, the positioning portion includes a connecting flange, the connecting flange includes an annular body and a boss formed on the annular body, the boss defines a central hole, the transparent member is disposed inside the boss, a radius of the central hole is smaller than a radius of the transparent member, and the connecting flange is disposed around the through hole and mounted on the box body portion, so that the boss can press the transparent member on the box body portion.

Optionally, the box portion includes guiding gutter, bottom plate and encircles the curb plate that the bottom plate set up, the through-hole sets up on the curb plate, the guiding gutter sets up the bottom plate with between the curb plate and encircle the whole week of bottom plate sets up, the tank bottom of guiding gutter is less than the face of bottom plate.

Optionally, the tank body portion further includes a liquid storage tank located between the side plate and the diversion trench, the liquid storage tank is in fluid communication with the diversion trench, the bottom of the liquid storage tank is lower than the bottom of the diversion trench, and the through hole is arranged corresponding to the position of the liquid storage tank.

Optionally, the bottom plate is rectangular, the flow guide grooves include two first flow guide grooves and two second flow guide grooves, the first flow guide grooves are perpendicular to the second flow guide grooves, and the liquid storage tank is disposed at a junction position of one of the first flow guide grooves and the second flow guide grooves.

Optionally, a sealant is arranged between the outer edge of the transparent member and the inner surface of the boss, and a sealant is arranged between the inner surface of the annular body and the box body portion.

Optionally, the box body portion includes a plurality of first connection holes disposed around the through hole, and the connection flange is provided with a second connection hole corresponding to the first connection hole, so that the connection flange is bolted to the box body portion.

Optionally, the central hole of the connecting flange has a diameter smaller than the diameter of the transparent member.

The utility model discloses the second aspect provides a power battery, power battery includes as above power battery's lower box.

A third aspect of the present invention provides a vehicle including the power battery as described above.

Drawings

FIG. 1 is a schematic structural diagram of a lower case of a power battery according to an embodiment of the present application;

FIG. 2 is an exploded schematic view of a portion of a lower case of a power cell according to one embodiment of the present application, showing a transparent member and a positioning portion;

FIG. 3 is a top view of the lower housing of the power cell of FIG. 1;

FIG. 4 is a partial schematic view of a case portion of the lower case of the power cell of FIG. 1;

FIG. 5 is a partial schematic view of a lower case of the power cell of FIG. 1;

fig. 6 is a flow chart of a vehicle for determining a battery pack leakage according to the present application.

Description of the reference numerals

10. A tank portion; 11. a through hole; 12. a diversion trench; 13. a bottom plate 14, side plates; 15. a liquid storage tank; 16. a first diversion trench; 17. a second guiding gutter; 18. a first connection hole; 19. a colloid;

21. a transparent member; 22. a connecting flange; 23. a second connection hole; 24. a central bore.

Detailed Description

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. It is to be understood that the description of the embodiments herein is for purposes of illustration and explanation only and is not intended to limit the invention.

As shown in fig. 1 and 2, the present application provides a lower box of a power battery, where the lower box of the power battery includes a box portion 10, a transparent member 21, and a positioning portion, a through hole 11 is formed on the box portion 10, the positioning portion can position the transparent member 21 to close the through hole 11, and the inside of the box portion 10 can be observed through the through hole 11 and the transparent member 21.

The positioning part can position the transparent piece 21 at the position of the through hole 11 and enable the transparent piece 21 to seal the through hole 11, so that a user can observe the condition inside the box body part 10 through the transparent piece 21 and the through hole 11, and then judge whether cooling liquid exists in the box body part 10, and if the cooling liquid exists, judge that the cooling liquid leaks and need to maintain the automobile. The application provides a lower box of power battery can judge whether coolant liquid has taken place and has leaked under the condition of not taking apart power battery's battery package, if take place to leak and can in time take corresponding measure, effectively reduces because of coolant liquid leaks the safety risk that causes the battery thermal runaway.

Referring to the structure shown in fig. 2, 4 and 5, the positioning portion includes a connecting flange 22, the connecting flange 22 includes an annular body and a boss formed on the annular body, the boss defines a central hole 24, the transparent member 21 is disposed inside the boss, the radius of the central hole 24 is smaller than the radius of the transparent member 21 so that the transparent member 21 is confined in the boss, the size of the boss matches the size of the transparent member 21, when the connecting flange 22 is mounted on the surface of the tank portion 10 around the through hole 11, the boss can press the transparent member 21 against the tank portion 10 and cause the transparent member 21 to close the through hole 11, and a user can see the inside of the lower tank through the central hole 24, the transparent member 21 and the through hole 11 so that the user can see whether the cooling liquid is present in the lower tank. Wherein the size of the transparent member 21 is larger than the size of the through hole 11 to ensure that the transparent member 21 closes the through hole 11, and more preferably, the axes of the transparent member 21, the through hole 11 and the central hole 24 are collinear.

In addition, as shown in fig. 2, a glue 19 is smeared between the outer edge of the transparent member 21 and the inner surface of the boss, the glue 19 is a sealant, and a sealant is smeared between the inner surface of the annular body and the box body portion 10 around the through hole 11, so that the connection between the transparent member 21 and the boss and the connection between the annular body and the box body portion 10 are enhanced by the sealant, and meanwhile, the sealant can ensure the sealing performance of the through hole 11, and the stability of the lower box body is improved.

As shown in fig. 1 and 3, the tank body portion 10 includes a guiding groove 12, a bottom plate 13 and a side plate 14 disposed around the bottom plate 13, the guiding groove 12 is disposed between the bottom plate 13 and the side plate 14 and disposed around the entire circumference of the bottom plate 13, the whole guiding groove 12 is communicated, and the bottom of the guiding groove 12 is lower than the surface of the bottom plate 13, so that when coolant leaks into the lower tank body, the coolant finally flows into the guiding groove 12, and through the through hole 11 disposed on the side plate 14, a user can conveniently observe whether the coolant exists in the guiding groove 12, so as to determine whether the coolant leaks from the battery.

Tank portion 10 still includes the liquid reserve tank 15 with guiding gutter 12 fluid intercommunication, the position at liquid reserve tank 15 place is lower, be less than the position at guiding gutter 12 place, make the coolant liquid in guiding gutter 12 can flow to liquid reserve tank 15, even a small amount of coolant liquid leakage has taken place for the battery package, the coolant liquid also can flow into liquid reserve tank 15 at last, consequently set up through-hole 11 in the position of liquid reserve tank 15, just can be convenient for the user observe the leakage of coolant liquid, but the condition emergence that the coolant liquid leakage can't be observed has been avoided having taken place.

Preferably, as shown in fig. 3, the bottom plate 13 is rectangular, the guiding grooves 12 include two first guiding grooves 16 and two second guiding grooves 17, the first guiding grooves 16 are perpendicular to the second guiding grooves 17, the liquid storage tank 15 is disposed at a junction position of one of the first guiding grooves 16 and the second guiding grooves 17, the liquid storage tank 15 is further outside, and the through hole 11 is disposed at a junction position of the first guiding grooves 16 and the second guiding grooves 17.

As shown in fig. 4, the through-hole 11 is provided at a lower position of the side plate 14, and a user can clearly see through the through-hole 11 when the cooling liquid is present in the reservoir 15; wherein a plurality of first connection holes 18 are arranged on the side plate 14 around the through hole 11, a second connection hole 23 corresponding to the first connection hole 18 is provided on the annular body of the connection flange 22, and the connection flange 22 can be mounted on the side plate 14 of the box body portion 10 by bolts (as shown in fig. 2 and 5); the bolted connection is easy to disassemble and the connecting flange 22 can be disassembled from the box portion 10 when necessary.

In another embodiment of the present application, the through hole 11 may be configured to match the shape of the transparent member 21, the transparent member 21 may be inserted into the through hole 11, a sealant may be disposed between the through hole 11 and the transparent member 21, and the connecting flange 22 may be installed around the through hole 11 to protect the transparent member 21. In this embodiment, the user is also able to view the inside of the case through the central hole 24 of the attachment flange 22 and the transparent member 21.

The second aspect of the present application provides a power battery, which includes the lower box of the power battery as described above.

A final aspect of the application provides a vehicle comprising a power battery as described above.

As shown in fig. 6, when the electrical property of the vehicle is abnormal, the user can check whether the liquid storage tank 15 contains the coolant through the through hole 11, the transparent member 21 and the central hole 24, and if the coolant is leaked from the battery pack, the user can drag the vehicle back to the maintenance point for maintenance; if the failure can not be eliminated is not caused by the coolant leakage, other reasons are analyzed.

In addition, when the automobile runs for a certain distance of mileage, the automobile can be observed once after running for a certain distance of mileage, for example, the automobile can be checked once after running for 10000 kilometers, whether the liquid storage tank 15 contains cooling liquid or not is checked, if the automobile is dragged back to a maintenance point for repair, if the automobile does not continue to run for 10000 kilometers, the automobile can be checked again, whether the liquid storage tank 15 contains cooling liquid or not is regularly checked, when the cooling liquid leaks, the cooling liquid can be timely found, and the safety risk of battery thermal runaway caused by leakage of the cooling liquid is effectively reduced.

The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited thereto. The technical scheme of the utility model in the technical conception scope, can be right carry out multiple simple variant. Including each of the specific features, are combined in any suitable manner. In order to avoid unnecessary repetition, the present invention does not separately describe various possible combinations. These simple variations and combinations should also be considered as disclosed in the present invention, all falling within the scope of protection of the present invention.

Claims

1. The lower box body of the power battery is characterized by comprising a box body part (10), a transparent piece (21) and a positioning part, wherein a through hole (11) is formed in the box body part (10), the positioning part can position the transparent piece (21) to seal the through hole (11), and the interior of the box body part (10) can be seen through the through hole (11) and the transparent piece (21).

2. The lower box of the power battery as claimed in claim 1, wherein the positioning part comprises a connecting flange (22), the connecting flange (22) comprises an annular body and a boss formed on the annular body, the boss defines a central hole (24), the transparent member (21) is arranged inside the boss, the radius of the central hole (24) is smaller than that of the transparent member (21), and the connecting flange (22) is arranged around the through hole (11) and mounted to the box body part (10) so that the boss can press the transparent member (21) on the box body part (10).

3. The lower box body of the power battery as claimed in claim 2, wherein the box body part (10) comprises a diversion trench (12), a bottom plate (13) and a side plate (14) arranged around the bottom plate (13), the through hole (11) is arranged on the side plate (14), the diversion trench (12) is arranged between the bottom plate (13) and the side plate (14) and arranged around the whole circumference of the bottom plate (13), and the bottom of the diversion trench (12) is lower than the plate surface of the bottom plate (13).

4. The lower box body of the power battery as claimed in claim 3, wherein the box body part (10) further comprises a liquid storage tank (15) positioned between the side plate (14) and the diversion trench (12), the liquid storage tank (15) is in fluid communication with the diversion trench (12), the bottom of the liquid storage tank (15) is lower than the bottom of the diversion trench (12), and the through hole (11) is arranged corresponding to the position of the liquid storage tank (15).

5. The lower box body of the power battery as claimed in claim 4, wherein the bottom plate (13) is rectangular, the guiding grooves (12) comprise two first guiding grooves (16) and two second guiding grooves (17), the first guiding grooves (16) are perpendicular to the second guiding grooves (17), and the liquid storage tank (15) is arranged at the junction position of one of the first guiding grooves (16) and the second guiding grooves (17).

6. The lower box body of the power battery as claimed in any one of claims 2 to 5, wherein a sealant is arranged between the outer edge of the transparent member (21) and the inner surface of the boss, and/or; and a sealant is arranged between the inner surface of the annular body and the box body part (10).

7. The lower box for power battery according to any one of claims 2-5, wherein the box body part (10) comprises a first connecting hole (18), a plurality of the first connecting holes (18) are arranged around the through hole (11), and a second connecting hole (23) corresponding to the first connecting hole (18) is arranged on the connecting flange (22) so that the connecting flange (22) is bolted to the box body part (10).

8. The lower box of power battery according to any one of claims 2-5, characterized in that the axes of the central hole (24), the transparent member (21) and the through hole (11) are collinear.

9. A power battery, characterized in that the power battery comprises the lower box body of the power battery of any one of claims 1-8.

10. A vehicle characterized by comprising the power battery of claim 9.