CN216928844U

CN216928844U - Electrolyte flow guide assembly and battery device

Info

Publication number: CN216928844U
Application number: CN202220146765.6U
Authority: CN
Inventors: 苏金国; 黄书强; 周猛
Original assignee: Sungrow Energy Storage Technology Co Ltd
Current assignee: Sungrow Energy Storage Technology Co Ltd
Priority date: 2022-01-19
Filing date: 2022-01-19
Publication date: 2022-07-08
Anticipated expiration: 2032-01-19

Abstract

The utility model discloses an electrolyte diversion assembly and a battery device, wherein the electrolyte diversion assembly is used for the battery device, and the battery device is provided with a battery main body and an explosion-proof valve arranged on the battery main body; the electrolyte diversion assembly comprises a diversion piece, a collection device and a driving assembly, wherein the diversion piece is provided with a diversion channel and is used for being mounted on the battery main body and covering the explosion-proof valve; the collecting device is provided with a collecting cavity which is communicated with the flow guide channel; the driving assembly is communicated with the flow guide channel and used for generating driving force for driving the electrolyte and/or gas to flow in the flow guide channel. According to the electrolyte diversion assembly provided by the utility model, the explosion-proof valve is isolated independently through the diversion piece, and the liquid is drained rapidly through the driving assembly, so that the safety of the battery device in the use process is greatly improved.

Description

Electrolyte flow guide assembly and battery device

Technical Field

The utility model relates to the technical field of battery safety, in particular to an electrolyte diversion assembly and a battery device.

Background

The existing battery device generally includes a battery main body, the battery main body is generally formed by connecting a plurality of battery cells through a battery cell pole piece, the battery cells may generate a large amount of high-temperature and high-pressure gas and liquid (electrolyte) due to internal reasons such as overcharge and overdischarge, or external reasons such as extrusion, puncture and drop, and a large amount of heat is generated, and finally fire and explosion may be caused, which causes great loss of human body and property, at present, a commonly used prevention means is to provide a gap at the middle position of a top cover of the battery cells, an explosion-proof valve is arranged at the gap, the explosion-proof valve is generally a thin aluminum foil, when the internal pressure of the battery cells reaches a critical point, the explosion-proof valve is firstly propped, the electrolyte and the gas in the battery cells are sprayed out, so that the internal pressure and the internal temperature of the battery cells are reduced, and the thermal runaway and the explosion of the battery are avoided, however, the electrolyte can flow on the top cover after being sprayed out, the electrolyte is accumulated on the top of the battery core and the top cover, the distances between two battery cell pole pieces in the battery module and between the battery core and the battery core are generally very short, the distance between the battery cell pole pieces and the top cover of the battery core is also very small, the electrolyte accumulated on the top cover can short-circuit the positive and negative pole pieces of the battery core, and then the short circuit of the whole battery device can be caused, and the electrolyte can be retained on the battery core for a long time and can also cause the possibility that the battery core which normally works originally is heated by the high-temperature electrolyte to cause thermal runaway.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide an electrolyte guide assembly, which is used for a battery device and can improve the safety of the battery device in the using process.

In order to achieve the above object, the present invention provides an electrolyte guiding assembly for a battery device, the battery device having a battery body and an explosion-proof valve disposed on the battery body; the electrolyte guide assembly includes:

the flow guide piece is provided with a flow guide channel and is used for being installed on the battery main body and covering the explosion-proof valve;

the collecting device is provided with a collecting cavity, and the collecting cavity is communicated with the flow guide channel;

and the driving assembly is communicated with the flow guide channel and is used for generating driving force for driving the electrolyte and/or gas to flow in the flow guide channel.

Optionally, the flow guide channel further has a first end and a second end, and the collection cavity of the collection device is communicated with the first end of the flow guide channel; the first end portion is provided with the drive assembly and/or the second end portion is provided with the drive assembly.

Optionally, the drive assembly is an explosion-proof fan.

Optionally, the flow guide channel further has a first end, a second end and a flow guide wall, and the collection cavity of the collection device is communicated with the first end of the flow guide channel; the guide wall is inclined from the second end part to the first end part and descends along the vertical direction.

Optionally, the diversion assembly further comprises a monitoring device, the diversion member is provided with an inner wall and an outer wall which are oppositely arranged, the inner wall faces the diversion channel, the outer wall deviates from the diversion channel, and the monitoring device is installed on the inner wall/the outer wall.

Optionally, the flow guide member has a first bottom wall having a first surface and a second surface oppositely arranged, the first surface faces the battery main body and contacts with the battery main body, and the second surface faces the flow guide channel; a seal is disposed between the first surface and the battery body.

Optionally, the sealing element is a high temperature resistant sealant.

Optionally, the outer surface of the collecting device is coated with a heat insulating material, and/or the collecting device is further provided with a cooling interlayer, and a phase change material is added into the cooling interlayer.

Optionally, an outer surface of the flow guide is coated with an insulating layer.

Optionally, the collecting device is provided with a drainage port.

The utility model also provides a battery device which comprises the electrolyte diversion assembly.

The utility model provides an electrolyte guiding assembly and a battery device, wherein the electrolyte guiding assembly is used for the battery device, and the battery device is provided with a battery main body and an explosion-proof valve arranged on the battery main body; the electrolyte diversion assembly comprises a diversion piece, a collection device and a driving assembly, the diversion piece is provided with a diversion channel, and the diversion piece is used for being mounted on the battery main body and covering the explosion-proof valve; the collecting device is provided with a collecting cavity which is communicated with the flow guide channel; the driving assembly is communicated with the flow guide channel and used for generating driving force for driving the electrolyte and/or gas to flow in the flow guide channel. According to the electrolyte diversion assembly provided by the utility model, the explosion-proof valve is isolated independently through the diversion piece, and the liquid is drained rapidly through the driving assembly, so that the safety of the battery device in the use process is greatly improved.

Drawings

In order to more clearly illustrate the embodiments or technical solutions of the present invention, the drawings used in the embodiments or technical solutions of the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is an exploded view of one embodiment of the present invention;

FIG. 2 is a front view of an embodiment of the present invention;

FIG. 3 is another elevational view of an embodiment of the utility model;

FIG. 4 is a top view of an embodiment of the present invention;

FIG. 5 is a schematic view of a structure of an active pen in cooperation with an embodiment of the present invention;

fig. 6 is a schematic structural diagram of an active pen accommodated in an embodiment of the utility model.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				100	Electrolyte flow guide assembly	110	Flow guiding piece
111	First end part	112	Second end portion
				113	Flow guide wall	120	Collecting device
130	Drive assembly	200	Battery body
				210	Electric core	220	Battery core pole piece
221	Explosion-proof valve

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The present invention provides an electrolyte guiding assembly 100 for a battery device, which is provided with a battery main body 200 and an explosion-proof valve 211 disposed on the battery main body 200, in combination with fig. 1 to 6; the battery main body 200 is generally formed by connecting a plurality of battery cells 210 through the battery cell pole pieces 220, when the battery cells 210 are used, the internal diaphragms of the battery cells 210 may be damaged due to overcharge and overdischarge, and a large amount of heat and gas are generated, which further causes explosion, and in order to avoid such a situation, a gap is formed between positive and negative battery cell poles on the top cover of the battery cells 210, and an explosion-proof valve 211 is disposed at the gap for prevention, wherein the explosion-proof valve 211 is generally a thin aluminum foil, and when the pressure inside the battery cells 210 reaches a critical point, the explosion-proof valve is firstly broken, the electrolyte and gas inside the battery cells 210 are sprayed out from the explosion-proof valve 211, so that the pressure and temperature inside the battery cells 210 are reduced, and battery thermal runaway and explosion are avoided, however, the electrolyte can flow on the top cover after being sprayed out, and accumulate on the top cover of the battery cells 210, the distances between the two cell pole pieces 220 and between the cell 210 and the cell 210 in the battery body 200 are generally short, and the distance between the cell pole pieces 220 and the top cover of the cell 210 is also small, so that the electrolyte accumulated on the top cover can be used as a conductive medium to connect the positive and negative cell pole pieces 220 with each other, so that the positive and negative pole pieces of the cell 210 are in short circuit, and further the short circuit of the whole battery device can be possibly caused.

In order to avoid the dangerous situation and improve the safety of the battery device in use, the utility model provides an electrolyte guiding assembly 100.

In an embodiment, referring to fig. 1 to 6, an electrolyte guiding assembly 100 according to the present invention includes a guiding member 110, a collecting device 120, and a driving assembly 130; the flow guide member 110 has a flow guide channel, the flow guide member 110 is used for being mounted on the battery body 200 and covering the explosion-proof valve 211, and when the explosion-proof valve 211 is opened, the opened opening is communicated with the flow guide channel; the collecting device 120 is provided with a collecting cavity which is communicated with the flow guide channel; the driving assembly 130 is communicated with the flow guide channel, and the driving assembly 130 is used for generating a driving force for driving the electrolyte and/or the gas to flow in the flow guide channel

In this embodiment, the diversion member 110 of the electrolyte diversion assembly 100 is covered on the explosion-proof valve 211 of the battery main body 200 to separate the explosion-proof valve 211 from the battery pole piece 220 and the collection harness, when the explosion-proof valve 211 is burst, the electrolyte sprayed out of the battery main body 200 and the sprayed explosion-proof sheet only exist in the diversion channel and flow into the collection cavity of the collection device 120 along the diversion channel, and the collection harness is not splashed or accumulated everywhere, thereby effectively preventing the collection harness from being corroded and melted by the electrolyte and even causing the risks of short circuit and the like of the battery device, preventing the occurrence of large-area dangerous accidents, and greatly improving the safety of the battery device in the use process.

In this embodiment, when the explosion-proof valve 211 is exploded and the electrolyte is sprayed, the driving assembly 130 works to generate a driving force for driving the electrolyte to flow in the diversion channel, so that the electrolyte can be rapidly discharged into the collecting device 120, and meanwhile, a certain heat dissipation effect is achieved; when the explosion-proof valve 211 is not exploded, the driving device is started to generate a driving force for driving the gas to flow in the flow guide channel, so that the heat dissipation effect can be achieved.

In this embodiment, the driving assembly 130 may be a negative pressure device or a blowing device.

Optionally, the flow guide channel further has a first end 111 and a second end 112, the collecting cavity of the collecting device 120 communicates with the first end 111; the driving assembly 130 is disposed at the first end portion 111 or the second end portion 112, or the driving assembly 130 is disposed at both the first end portion 111 and the second end portion 112, it can be understood that the driving assembly 130 disposed at the first end portion 111 should be a negative pressure device, and the electrolyte is rapidly sucked to the collecting cavity of the collecting device 120 by using the negative pressure, and it can be understood that the driving assembly 130 disposed at the second end portion 112 should be a blowing device.

It can be understood that after the electrolyte is sprayed, the electrolyte can be quickly discharged into the collecting device 120 due to the existence of the driving assembly 130, in an actual experiment, if no driving assembly 130 exists, when the battery core is out of control thermally, the temperature in the battery module can reach about 300 ℃, the duration time can reach tens of minutes, the temperature far exceeds the working temperature range of a common battery core (-20 ℃ -60 ℃), and the hazard is extremely high; meanwhile, if the driving assembly 130 is not present, the electrolyte is difficult to flow out or difficult to completely flow out, and the electrolyte will be retained in the flow guide channel for a long time, and the long-term retention of the electrolyte on the battery cell 210 may also cause the battery cell 210 which originally normally operates to be heated by the high-temperature electrolyte to cause thermal runaway; in addition, in practical production, in order to ensure the sealing performance of the contact between the flow guide element 110 and the battery main body 200, a sealant is generally added between the contact surfaces of the flow guide element and the battery main body, the sealant gradually fails in a high-temperature environment and an environment soaked by electrolyte for a long time, and finally leakage is caused, and even if the sealing is performed by adopting a method other than the sealant, the risk of leakage is increased due to the long-term accumulation of the electrolyte.

In this embodiment, optionally, the diversion element 110 is made of aluminum, which has high performance-price ratio and is resistant to high temperature.

In one embodiment, referring to fig. 1 to 6, the driving assembly 130 is an explosion-proof fan. The explosion-proof fan and the common fan are air conditioning appliances which drive blades to rotate by a motor to drive airflow so as to exchange indoor air and outdoor air. The anti-explosion exhaust fan is widely applied to families and public places, is mainly used in some special scenes such as inflammable and explosive scenes, is suitable for environments with the temperature groups of T1-T4 (T4 is not higher than 135 ℃, T3 is not higher than 200 ℃, T2 is not higher than 300 ℃, and T1 is not higher than 450 ℃), and is matched with the use scene of the anti-explosion exhaust fan.

In addition, it should be noted that the explosion-proof fan is only one specific embodiment of the driving assembly 130, and in other embodiments, the driving assembly 130 may also be an air/liquid pump, etc., which is not limited herein.

In an embodiment, with reference to fig. 1 to 6, the flow guide channel has a first end 111, a second end 112 and a flow guide wall 113, and the collection chamber of the collection device 120 is communicated with the first end 111 of the flow guide channel; the guide wall 113 is inclined downward from the second end 112 toward the first end 111 in a vertical direction, and the electrolyte naturally flows toward the collection cavity of the collection device 120 under the action of gravity.

In a specific implementation of this embodiment, the flow guiding wall 113 is in a slope shape, and it can be understood that when the explosion-proof valve 211 is exploded and the electrolyte is sprayed out, the electrolyte may flow downward along the slope of the flow guiding wall 113, and the collecting device 120 is communicated with the first end 111 of the flow guiding channel, that is, the collecting device 120 is located at the lowest point of the slope, so as to ensure that the electrolyte finally flows into the collecting cavity.

Further, as described in the above embodiments, the driving assembly 130 may also be disposed at the first end 111, the second end 112, or both the first end 111 and the second end 112 to accelerate the flow of the electrolyte, so that the electrolyte is rapidly discharged into the collecting cavity of the collecting device 120.

In an embodiment, referring to fig. 1 to 6, the electrolyte diversion assembly further includes a monitoring device (not shown), the diversion member 110 has an inner wall and an outer wall which are oppositely arranged, the inner wall faces the diversion channel, the outer wall faces away from the diversion channel, and the monitoring device is mounted on the inner wall or the outer wall. Monitoring devices can monitor parameters such as atmospheric pressure, temperature or smog, and once atmospheric pressure, temperature or smog reach its numerical value that predetermines, will automatic triggering drive assembly 130 start, realize the water conservancy diversion to electrolyte, make electrolyte arrange to collect the intracavity fast, and meanwhile still play certain radiating effect.

In this embodiment, it should be noted that the driving assembly 130 is not only able to be started when the explosion-proof valve 221 is burst, but also the driving assembly 130 can be in a working state to dissipate heat of the battery main body 200 during normal use, specifically: the driving device 130 may be set to three modes of off/power-limited operation/normal operation, that is, when the battery main body 200 does not need to dissipate heat, the driving device 130 may be in an off state, and when the battery main body 200 needs to dissipate heat to some extent, the driving device may perform power-limited operation or normal operation according to the monitored temperature.

It should be noted that, here, only two specific examples are given, which are not limitative to the present embodiment, and the present invention can be set as needed in practical applications.

In this embodiment, when the monitoring device is mounted on the inner wall, it is needless to say that the monitoring sensitivity is higher, and the change in the flow guide channel can be promptly and sharply monitored, but when the explosion-proof valve 211 is exploded, the electrolyte directly contacts the monitoring device when sprayed, increasing the risk of damage to the monitoring device; when the monitoring device is installed on the outer wall of the diversion pipeline, the monitoring device is isolated from the electrolyte and is not easy to damage, the sensitivity is lower than that when the monitoring device is installed on the inner wall, but the monitoring device is not easy to damage at the moment, and the service life of the monitoring device is prolonged.

In one embodiment, with reference to fig. 1 to 6, the flow guiding member 110 has a first bottom wall having a first surface and a second surface oppositely disposed, the first surface facing the battery main body 200 and contacting the battery main body 200, and the second surface facing the flow guiding channel; when explosion-proof valve 211 is propped up brokenly, for the electrolyte that sprays out in guaranteeing battery main part 200 only can exist in the water conservancy diversion passageway, and can not flow along the gap, need guarantee the leakproofness of first surface and battery main part 200 contact, set up the sealing member between first surface and battery main part 200, in addition, because the electrolyte temperature that sprays out when explosion-proof valve 211 explodes is higher, and possess certain corrosivity, consequently adopt high temperature resistant, corrosion-resistant sealing member can be better to it is sealed, optionally, can set up high temperature resistant sealed glue between first surface and battery main part 200, high temperature resistant sealed glue adhesion strength is high, the leakproofness is good, high temperature resistant, corrosion-resistant, sealed face possesses fabulous adhesive force.

Of course, the sealing element may be sealed by using a high temperature resistant sealant, or by using mechanical methods such as mechanical deformation of a gasket to ensure sealing performance or making the contact surface into a mechanical form such as labyrinth seal, and the sealing form is not limited here as long as sealing of the contact surface between the current guiding element 110 and the battery main body 200 is ensured.

It should be noted that, in some embodiments, the first bottom wall and the flow guide wall 113 are the same, as shown in fig. 1, at this time, the first bottom wall is the flow guide wall 113, and the flow guide wall 113 is the first bottom wall; however, in other embodiments, the first bottom wall and the flow guiding wall 113 may not be the same, and each may refer to a different wall surface.

In one embodiment, in order to prevent the high temperature of the electrolyte from adversely affecting the battery body 200 or other components in the battery device, the outer surface of the collecting device 120 may be coated with a heat insulating material, such as glass fiber paper, asbestos, rock wool, or the like; a cooling interlayer can also be arranged on the collecting device 120, and a phase-change material is added in the cooling interlayer to rapidly reduce the electrolyte flowing into the collecting device 120 to be below the safe temperature; of course, the outer surface of the collecting device 120 may be coated with a heat insulating material, and a cooling insulation layer may be disposed at the collecting device 120.

In one embodiment, the outer surface of the current guiding member 110 is coated with an insulating layer, such as spraying insulating paint or coating an insulating film, so as to ensure the insulating property and improve the safety of the battery device during the use process.

In one embodiment, the collecting device 120 is opened with a drain port (not shown) to discharge the electrolyte in time, and it can be understood that the electrolyte can be discharged in time to control the temperature.

The present invention further provides a battery device, which includes the electrolyte guiding assembly 100 according to any of the above embodiments, and therefore, the technical effects achieved are also completely the same, and are not described herein again.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. An electrolyte diversion assembly is used for a battery device, and the battery device is provided with a battery main body and an explosion-proof valve arranged on the battery main body; it is characterized in that the electrolyte diversion component comprises:

2. The electrolyte flow guide assembly of claim 1 wherein the flow guide channel further has a first end and a second end, the collection chamber of the collection device communicating with the first end of the flow guide channel; the first end portion is provided with the drive assembly and/or the second end portion is provided with the drive assembly.

3. The electrolyte diversion assembly of claim 2 wherein said drive assembly is an explosion-proof fan.

4. The electrolyte flow guide assembly of claim 1 wherein the flow guide channel further has a first end, a second end, and a flow guide wall, the collection chamber of the collection device being in communication with the first end of the flow guide channel; the guide wall is inclined from the second end part to the first end part and descends along the vertical direction.

5. The electrolyte diversion assembly of claim 1 further comprising a monitoring device, said diversion member having an inner wall and an outer wall disposed opposite, said inner wall facing said diversion channel and said outer wall facing away from said diversion channel, said monitoring device mounted on said inner/outer wall.

6. The electrolyte flow guide assembly of claim 1 wherein the flow guide member has a first bottom wall having first and second oppositely disposed surfaces, the first surface facing the cell body and contacting the cell body, the second surface facing the flow guide channel; a seal is disposed between the first surface and the battery body.

7. The electrolyte diversion assembly of claim 6 wherein said sealing element is a high temperature resistant sealant.

8. The electrolyte diversion assembly of claim 1 wherein an outer surface of said collection means is coated with a thermal insulation material and/or said collection means is further provided with a temperature reduction barrier with a phase change material added therein.

9. The electrolyte diversion assembly of claim 1 wherein an outer surface of said diversion member is coated with an insulating layer.

10. The electrolyte diversion assembly of claim 1 wherein said collection means defines a drain opening.

11. A battery device comprising an electrolyte diversion assembly as defined in any of claims 1 to 10.