CN219144458U - Liquid draining device for removing cooling liquid leaked from power battery pack - Google Patents
Liquid draining device for removing cooling liquid leaked from power battery pack Download PDFInfo
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- CN219144458U CN219144458U CN202223183735.1U CN202223183735U CN219144458U CN 219144458 U CN219144458 U CN 219144458U CN 202223183735 U CN202223183735 U CN 202223183735U CN 219144458 U CN219144458 U CN 219144458U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The utility model discloses a liquid discharge device for discharging cooling liquid leaked by a power battery pack, which comprises a shell fixedly connected with a power battery pack shell, wherein an inner cavity with one end open is formed in the shell, a liquid suction expansion body and a liquid discharge unit are sequentially arranged in the inner cavity along a shaft, the power battery pack shell is communicated with the liquid suction expansion body and the liquid discharge unit, a liquid discharge port opened or closed by the liquid discharge unit is formed in the shell, and the liquid suction expansion body is used for sucking liquid to push the liquid discharge unit to open the liquid discharge port, so that the power battery pack shell, the liquid discharge unit and the liquid discharge port are communicated to form a liquid discharge channel. Through the mode, the liquid discharging device for removing the cooling liquid leaked from the power battery pack can quickly discharge the cooling liquid accumulated at the low-lying position in the power battery pack when the cooling liquid leaks, so that the phenomena of larger faults, short circuits, thermal runaway and the like of the battery pack are avoided, and the safety of passengers and citizens and property are protected.
Description
Technical Field
The utility model relates to the field of liquid discharge valves, in particular to a liquid discharge device for discharging cooling liquid leaked from a power battery pack.
Background
The cooling system is used for the power lithium ion battery pack for the vehicle, and the power lithium ion battery pack can maintain the better working temperature of the power lithium ion battery by cooling or heating the power lithium ion battery, so that the running efficiency of the power lithium ion battery pack is improved, and the service life of the power lithium ion battery pack is prolonged. At present, the thermal management of the power lithium ion battery pack system for the vehicle can be mainly divided into four types, namely natural cooling, air cooling, liquid cooling and direct cooling.
Liquid cooling uses a cooling fluid (such as ethylene glycol) as a heat exchange medium. There are typically multiple different heat exchange circuits, e.g., the Chevrovian has a radiator circuit, an air conditioning circuit, a PTC circuit, and the battery management system should and switches according to thermal management policies.
However, under the high-temperature oxidation of glycol in cold liquid, hydroxyl groups are acidified, the glycol can be oxidized into glycollic acid and then oxidized into oxalic acid after long-term working circulation at 80 ℃ and-90 ℃, the oxalic acid and glycol oxalic acid can corrode equipment and liquid cooling pipes, especially the liquid cooling pipes are formed by adopting aluminum foil or copper foil for welding, the surface defect of welding seams or liquid cooling pipes is easy to corrode to leak, if the leaked glycol cooling liquid cannot be discharged out of a battery pack in time, the phenomena of failure, short circuit or thermal runaway of the battery pack can be caused, but leakage holes cannot be formed in the battery pack directly, and the phenomenon of condensation fog can be prevented because the battery pack must keep a dry state in the inside under normal working conditions.
Disclosure of Invention
The utility model mainly solves the technical problem of providing the liquid discharging device for removing the cooling liquid leaked from the power battery pack, which can quickly discharge the cooling liquid accumulated at the low-lying position in the power battery pack when the cooling liquid leaks, thereby avoiding the phenomena of larger faults, short circuits or thermal runaway of the battery pack and protecting the safety of passengers and citizens and property.
In order to solve the technical problems, the utility model adopts a technical scheme that: the utility model provides a get rid of flowing back device of coolant liquid that power battery package leaked, include with power battery package casing fixed connection's shell, form one end open-ended inner chamber in the shell, the inner chamber is equipped with imbibition expansion body and flowing back unit along the axle in proper order, power battery package casing and imbibition expansion body and flowing back unit intercommunication, it has the leakage fluid outlet that opens or close through the flowing back unit to open on the shell, imbibition expansion body imbibition expansion is in order to promote the flowing back unit to open the leakage fluid outlet to make the intercommunication form the drainage passageway between power battery package casing, flowing back unit and the leakage fluid outlet.
In a preferred embodiment of the present utility model, a first channel and a second channel are provided between the power battery pack housing and the outer shell, the first channel communicates the imbibition expansion body with the power battery pack housing, and the second channel communicates the liquid discharge unit with the power battery pack housing.
In a preferred embodiment of the utility model, the liquid draining unit is a valve rod which is movably and hermetically connected in the inner cavity, a gap is formed between the middle part of the valve rod and the shell, a liquid draining channel is formed, the valve rod moves relative to the liquid draining port to open or close the liquid draining port, the cooling liquid of the power battery pack shell is absorbed by the liquid absorbing expansion body through the first channel, and the liquid absorbing expansion body pushes the valve rod to move rightwards after being expanded, so that the cooling liquid flows out through the second channel, the liquid draining channel and the liquid draining port.
In a preferred embodiment of the present utility model, the right end of the valve stem shields the drain, and the right end of the valve stem is moved to separate the drain from the right end of the valve stem to open the drain.
In a preferred embodiment of the utility model, the cross section of the valve rod is I-shaped, and two ends of the valve rod are in dynamic sealing connection with the inner wall of the shell through sealing rings.
In a preferred embodiment of the utility model, the liquid draining unit is a ball valve core with a liquid draining hole, a gear below a central shaft of the ball valve core is connected with a rack rod, the rack rod is in contact with a liquid absorbing expansion body, the cooling liquid of the power battery pack shell is absorbed by the liquid absorbing expansion body through a first channel, and the liquid absorbing expansion body pushes the rack rod to drive the ball valve core to rotate after expanding, so that the cooling liquid is drained through a second channel, the liquid draining hole and the liquid draining hole.
In a preferred embodiment of the utility model, the opening of the inner cavity is further connected with an adjusting screw in a threaded manner, and the adjusting screw compresses the imbibition expansion body on the liquid draining unit and seals the opening of the inner cavity.
In a preferred embodiment of the utility model, the right end of the inner cavity is further provided with a return spring, the return spring is tightly pressed between the right end face of the liquid discharge unit and the inner wall of the shell, and the right end of the inner cavity is further provided with a balance air port.
In a preferred embodiment of the present utility model, a sealing gasket is provided between the power battery pack case and the outer case.
In a preferred embodiment of the present utility model, the liquid absorbing expansion body is a filler of a polymer resin material absorbing the glycol coolant, and the filler of the polymer resin material is an expansion bar or an expansion gasket made by mixing one or more of phosphazenium-based ionomer, copolymer monomer of behenyl methacrylate and glycidyl methacrylate, water absorbing resin, and water stopping and water absorbing expansion rubber.
The beneficial effects of the utility model are as follows: according to the liquid discharging device for discharging the cooling liquid leaked from the power battery pack, the liquid sucking expansion body which can expand when absorbing the cooling liquid is used for opening the liquid discharging unit, the liquid discharging unit discharges the cooling liquid leaked from the shell of the power battery pack from the liquid discharging hole along the liquid discharging unit, so that the cooling liquid is prevented from accumulating at a low-lying position in the power battery pack, and the risk of short circuit in the battery pack is reduced.
According to the liquid discharging device for discharging the cooling liquid leaked by the power battery pack, the liquid sucking expansion body which can expand when absorbing the cooling liquid is used for opening the liquid discharging unit, and when the cooling liquid is not leaked by the power battery pack, the liquid discharging unit isolates the inside of the battery pack from the outside air, so that the inside of the battery pack is not influenced by the outside environment.
The liquid draining device for draining the cooling liquid leaked by the power battery pack is simple in structure, convenient to install and good in using effect, and the liquid draining unit is arranged by adopting the valve rod or the ball valve core.
Drawings
For a clearer description of the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the description below are only some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art, wherein:
FIG. 1 is a schematic view of a preferred embodiment of a drain device for removing coolant from a power cell pack according to the present utility model;
FIG. 2 is a schematic view showing a drain state of a drain device for discharging a coolant leaked from a power battery pack according to the present utility model;
FIG. 3 is a schematic view of another preferred embodiment of the drain device for removing coolant leakage from a power cell pack according to the present utility model;
FIG. 4 is a schematic view of the liquid discharge apparatus of FIG. 3;
the components in the drawings are marked as follows: 1. the power battery pack comprises a power battery pack shell body 11, a first channel 12, a second channel 2, a shell 21, a liquid absorption expansion body 22, a valve rod 221, a liquid discharge channel 23, a liquid discharge port 24, a balance air port 25, a return spring 26, an adjusting screw 27, a ball valve core 28, a gear 29, a rack rod 3 and a sealing gasket.
Detailed Description
The technical solutions in the embodiments of the present utility model will be clearly and completely described below. The structures, proportions, sizes, etc. shown in the drawings are shown only in connection with the present disclosure, and are not intended to limit the scope of the utility model, since any modification, variation in proportions, or adjustment of the size, etc. of the structures, proportions, etc. should be considered as falling within the spirit and scope of the utility model, without affecting the effect or achievement of the objective. Also, the terms "upper", "lower", "left", "right", "middle", and the like are used herein for descriptive purposes only and are not intended to limit the scope of the utility model for modification or adjustment of the relative relationships thereof, as they are also considered within the scope of the utility model without substantial modification to the technical context.
Referring to fig. 1 and 2, a liquid draining device for draining a cooling liquid leaked from a power battery pack includes a housing 2 fixedly connected to a power battery pack case 1. A sealing gasket 3 is arranged between the power battery pack shell 1 and the shell 2. A first channel 11 and a second channel 12 are provided between the power battery pack housing 1 and the outer shell 2. The first channel 11 and the second channel 12 comprise a plurality of through holes which are aligned and formed on the power battery pack housing 1 and the outer shell 2, the first channel 11 and the second channel 12 are independent, and the leaked cooling liquid of the power battery pack housing 1 can enter the outer shell 2 from the first channel 11 and the second channel 12 at the same time. The gasket 3 mainly seals all the areas between the power cell pack case 1 and the housing 2 except the first passage 11 and the second passage 12, and prevents the coolant flowing through the first passage 11 and the second passage 12 from leaking to the outside from between the power cell pack case 1 and the housing 2.
An inner cavity with one end open is formed in the shell 2, and a liquid sucking expansion body 21 and a liquid discharging unit are sequentially arranged in the inner cavity along the shaft. The power battery pack housing 1 is communicated with the imbibition expansion body 21 and the liquid discharge unit, the first channel 11 communicates the imbibition expansion body 21 with the power battery pack housing 1, and the second channel 12 communicates the liquid discharge unit with the power battery pack housing 1. Part of the leaked cooling liquid in the power battery pack case 1 enters the case 2 through the first passage 11 and is directly absorbed by the liquid absorbing expansion body 21, and the other part flows into the region of the liquid discharging unit in the case 2.
The casing 2 is provided with a liquid discharge port 23 opened or closed by a liquid discharge unit. The imbibition expansion body 21 imbibition expands to push the liquid discharge unit to open the liquid discharge port 23, so that the power battery pack shell 1, the liquid discharge unit and the liquid discharge port 23 are communicated to form a drainage channel. When the imbibition expansion body 21 expands, the imbibition expansion body can act on the liquid discharge unit, the liquid discharge unit generates displacement in the inner cavity, the liquid discharge port 23 is opened by the liquid discharge unit, and the leaked cooling liquid in the power battery pack shell 1 flows out of the liquid discharge port 23 through the liquid discharge unit, so that the accumulation of the cooling liquid in the power battery pack shell 1 is prevented.
The liquid draining unit is a valve rod 24 which is connected in the inner cavity in a dynamic sealing way. The middle part of the valve rod 22 is arranged with a gap with the shell 2, and forms a liquid discharge channel 221. The right end of the valve rod 22 shields the liquid discharge port 23, and the valve rod 22 moves rightward to separate the right end of the valve rod 22 from the liquid discharge port 23, thereby opening the liquid discharge port 23. The valve stem 22 moves relative to the liquid discharge port 23 to open or close the liquid discharge port 23. The cooling liquid of the power battery pack case 1 is absorbed by the liquid-absorbing expansion body 21 through the first passage 11, and the liquid-absorbing expansion body 21 expands to push the valve rod 22 to move rightward, so that the cooling liquid is discharged through the second passage 12, the liquid discharge passage 221 and the liquid discharge port 23. The cross section of the valve rod 22 is I-shaped, and two ends of the valve rod are in dynamic sealing structure with the inner wall of the shell 2 through at least one sealing ring. In the initial state, as shown in fig. 1, the right end of the valve rod 22 completely shields the liquid outlet 23, and the right end of the valve rod 22 plays a role in completely isolating the external environment from the power battery pack housing 1, so that the power battery pack housing 1 is prevented from being influenced by the external environment. When the cooling liquid of the power battery pack shell 1 leaks, the cooling liquid enters the shell 2 along the first channel 11 and the second channel 12, meanwhile, the liquid absorbing expansion body 21 begins to expand after absorbing the cooling liquid, the liquid absorbing expansion body 21 pushes the valve rod 22 rightwards, the valve rod 22 starts to move rightwards until the right end of the valve rod 22 is completely staggered with the liquid outlet 23, at the moment, the liquid outlet 221 on the valve rod 22 communicates the second channel 12 with the liquid outlet 23 to form a drainage channel, and the cooling liquid in the power battery pack shell 1 is discharged from the liquid outlet 23 along the drainage channel, so that the rapid discharge of the cooling liquid is realized, as shown in fig. 2.
The right end of the inner cavity is also provided with a return spring 25, and a balance air port 24 is also arranged at the right end of the inner cavity between the right end surface of the liquid discharge unit and the inner wall of the shell 2 by the compression of the return spring 25. When the valve rod 22 moves rightwards, the gas in the shell 2 is discharged from the balance air port 24, the closed inner cavity is prevented from influencing the movement of the valve rod 22, meanwhile, the reset spring 25 is compressed, and after the water discharge is completely finished or the imbibition expansion body 21 is dried and restored, the reset spring 25 provides a reset force for the valve rod 22, so that the valve rod 22 returns to the initial position.
An adjusting screw 26 is also connected with the opening of the inner cavity in a threaded manner. The adjusting screw 26 presses the imbibition body 21 against the drainage unit and closes the lumen opening. The liquid-absorbing expansion body 21 is expanded in the shell 2, the liquid-absorbing expansion body 21 plays a role in sealing, the left side of the inner cavity is sealed, and meanwhile, the liquid-absorbing expansion body 21 can be propped against through the adjusting screw 26, so that the whole liquid draining device is in an initial locking state. During installation, the reset spring 25 is firstly placed in the inner cavity, then the valve rod 22 is placed in the inner cavity, then the imbibition expansion body 21 is placed in the inner cavity, and finally the adjusting screw 26 is screwed in to a proper position.
The liquid absorbing expansion body 21 is a filler of a polymer resin material absorbing glycol coolant, and the filler of the polymer resin material is an expansion bar or an expansion gasket which is prepared by mixing one or more of phosphazenium-based ionomer, copolymer monomer of behenyl methacrylate and glycidyl methacrylate, water absorbing resin and water stopping and water absorbing expansion rubber. The water-stopping (water-absorbing) expansion rubber is added with SAP in the rubber, has the characteristic of being capable of expanding to a plurality of times of the self mass or volume after water absorption, and has certain water-retaining capacity while maintaining the specific elasticity and strength of the rubber. The water-stopping (water-absorbing) expansion rubber has the dual characteristics of elastic sealing water stopping and water-absorbing expansion water stopping, has good effect, safety and reliability, convenient construction and wide application range, and is considered as a super sealing material, and people attach more and more importance to the water-stopping (water-absorbing) expansion rubber. The hydrophilic alcohol absorbing material filler can expand greatly in volume after being wetted, and the expansion force pushes the device to overcome the resistance of the spring to shift, so that a leakage channel is formed between the inside and the outside of the battery pack, and the leaked and accumulated glycol cooling liquid is discharged out of the battery pack in time.
In embodiment 2, referring to fig. 3 and 4, the liquid draining unit is a ball valve core 27 with a liquid draining hole, a gear 28 below the central axis of the ball valve core 27 is connected with a rack bar 29, the rack bar 29 is in contact with the liquid absorbing expansion body 21, the cooling liquid of the power battery pack housing 1 is absorbed by the liquid absorbing expansion body 21 through the first channel 11, and the liquid absorbing expansion body 21 expands to push the rack bar 29 to drive the gear 28 to rotate, so that the ball valve core 27 rotates, and the cooling liquid is drained through the second channel 12, the liquid draining hole and the liquid draining port 23. The procedure is as in example 1.
Compared with the prior art, the liquid discharging device for removing the cooling liquid leaked from the power battery pack can quickly discharge the cooling liquid accumulated at the low-lying position in the power battery pack when the cooling liquid leaks, so that the phenomena of larger faults, short circuits, thermal runaway and the like of the battery pack are avoided, and the safety of passengers and citizens and property are protected.
The utility model and its embodiments have been described above by way of illustration and not limitation, and the utility model is illustrated in the accompanying drawings and described in the drawings in which the actual structure is not limited thereto. Therefore, if one of ordinary skill in the art is informed by this disclosure, the structural mode and the embodiments similar to the technical scheme are not creatively designed without departing from the gist of the present utility model.
Claims (10)
1. The utility model provides a get rid of flowing back device of coolant liquid that power battery package leaked, includes the shell with power battery package casing fixed connection, its characterized in that, form one end open-ended inner chamber in the shell, the inner chamber is equipped with imbibition expansion body and flowing back unit along the axle in proper order, power battery package casing and imbibition expansion body and flowing back unit intercommunication, it has the leakage fluid dram that opens or close through the flowing back unit to open on the shell, imbibition expansion body imbibition expansion is in order to promote the flowing back unit to open the leakage fluid dram, thereby make the intercommunication form the leakage flow passageway between power battery package casing, flowing back unit and the leakage fluid dram.
2. The cooling fluid drain device for removing leakage from a power battery pack according to claim 1, wherein a first channel and a second channel are provided between the power battery pack case and the outer case, the first channel communicates the imbibition expansion body with the power battery pack case, and the second channel communicates the drain unit with the power battery pack case.
3. The liquid draining device for removing the leaked cooling liquid from the power battery pack according to claim 2, wherein the liquid draining unit is a valve rod which is movably and hermetically connected in the inner cavity, a gap is formed between the middle part of the valve rod and the outer shell, a liquid draining channel is formed, the valve rod moves relative to the liquid draining port to open or close the liquid draining port, the cooling liquid from the power battery pack shell is absorbed by the liquid absorbing expansion body through the first channel, and the liquid absorbing expansion body pushes the valve rod to move rightwards after being expanded, so that the cooling liquid flows out through the second channel, the liquid draining channel and the liquid draining port.
4. The cooling liquid drain device for removing leakage of the power battery pack according to claim 3, wherein the right end of the valve rod shields the liquid drain port, and the right end of the valve rod is separated from the liquid drain port by right movement of the valve rod, so that the liquid drain port is opened.
5. The cooling liquid draining device for removing leakage of power battery pack according to claim 4, wherein the cross section of the valve rod is I-shaped, and two ends of the valve rod are in dynamic sealing connection with the inner wall of the shell through sealing rings.
6. The liquid draining device for removing the cooling liquid leaked from the power battery pack according to claim 2, wherein the liquid draining unit is a ball valve core with a liquid draining hole, a gear below a central shaft of the ball valve core is connected with a rack rod, the rack rod is in contact with a liquid absorbing expansion body, the cooling liquid of the power battery pack shell is absorbed by the liquid absorbing expansion body through a first channel, and the liquid absorbing expansion body pushes the rack rod to drive the ball valve core to rotate after expanding, so that the cooling liquid can drain through a second channel, the liquid draining hole and the liquid draining hole.
7. The liquid discharge device for removing the leaked cooling liquid from the power battery pack according to any one of claims 1 to 6, wherein an adjusting screw is further screwed to the opening of the inner cavity, and the adjusting screw compresses the liquid suction expansion body on the liquid discharge unit and closes the opening of the inner cavity.
8. The liquid discharge device for removing the leaked cooling liquid from the power battery pack according to claim 7, wherein the right end of the inner cavity is further provided with a return spring, the return spring is pressed between the right end face of the liquid discharge unit and the inner wall of the outer shell, and the right end of the inner cavity is further provided with a balancing air port.
9. The cooling fluid discharge apparatus for removing leakage of a power battery pack according to claim 8, wherein a sealing gasket is provided between the power battery pack case and the outer case.
10. The liquid discharging device for removing the cooling liquid leaked from the power battery pack according to claim 9, wherein the liquid absorbing expansion body is a filler of a polymer resin material absorbing the glycol cooling liquid, and the filler of the polymer resin material is an expansion bar or an expansion gasket made of one or more of phosphazenium-based ionomer, a copolymer monomer of behenyl methacrylate and epoxypropyl methacrylate, a water absorbing resin, and a water stopping and water absorbing expansion rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223183735.1U CN219144458U (en) | 2022-11-30 | 2022-11-30 | Liquid draining device for removing cooling liquid leaked from power battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223183735.1U CN219144458U (en) | 2022-11-30 | 2022-11-30 | Liquid draining device for removing cooling liquid leaked from power battery pack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219144458U true CN219144458U (en) | 2023-06-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223183735.1U Active CN219144458U (en) | 2022-11-30 | 2022-11-30 | Liquid draining device for removing cooling liquid leaked from power battery pack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219144458U (en) |
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2022
- 2022-11-30 CN CN202223183735.1U patent/CN219144458U/en active Active
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