CN117916936A - Battery housing with pressure equalization function, pressure equalization element, drive battery and motor vehicle - Google Patents
Battery housing with pressure equalization function, pressure equalization element, drive battery and motor vehicle Download PDFInfo
- Publication number
- CN117916936A CN117916936A CN202280059975.4A CN202280059975A CN117916936A CN 117916936 A CN117916936 A CN 117916936A CN 202280059975 A CN202280059975 A CN 202280059975A CN 117916936 A CN117916936 A CN 117916936A
- Authority
- CN
- China
- Prior art keywords
- battery housing
- inlet
- valve
- battery
- pressure equalization
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000000903 blocking effect Effects 0.000 claims abstract 2
- 239000012528 membrane Substances 0.000 claims description 27
- 230000035699 permeability Effects 0.000 claims description 13
- 210000004027 cell Anatomy 0.000 description 11
- 239000007788 liquid Substances 0.000 description 6
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 4
- 239000004810 polytetrafluoroethylene Substances 0.000 description 4
- 230000001419 dependent effect Effects 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- -1 Polytetrafluoroethylene Polymers 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 210000000352 storage cell Anatomy 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/14—Check valves with flexible valve members
- F16K15/148—Check valves with flexible valve members the closure elements being fixed in their centre
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/18—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on either side
- F16K17/19—Equalising valves predominantly for tanks
- F16K17/196—Equalising valves predominantly for tanks spring-loaded
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/308—Detachable arrangements, e.g. detachable vent plugs or plug systems
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/317—Re-sealable arrangements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/394—Gas-pervious parts or elements
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Gas Exhaust Devices For Batteries (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention relates to a battery housing (3) comprising: an inlet valve (6) which allows a flow through into the battery housing (3) and prevents a flow out of the battery housing (3); -a drain valve (7) allowing a flow through from the battery housing (3) and blocking a flow into the battery housing (3); an inlet diaphragm (10) arranged in series with the inlet valve (6); and a discharge diaphragm (11) arranged in series with the discharge valve (7). The invention further relates to a pressure equalization element (4) for a housing, comprising: an inlet valve (6) which allows flow therethrough only in a first direction; a discharge valve (7) which permits flow therethrough only in a second direction opposite to the first direction; an inlet diaphragm (10) arranged in series with the inlet valve (6); and a discharge diaphragm (11) arranged in series with the discharge valve (7). The invention also relates to a drive battery and a motor vehicle.
Description
Technical Field
The invention relates to a pressure equalization element for a housing and to a battery housing, which can be pressure equalized. The invention further relates to a drive battery having such a battery housing and to a motor vehicle having such a battery housing or such a drive battery.
Background
Electrically driven motor vehicles have a drive battery which is necessarily bulky and has a corresponding battery housing. The battery housing is typically hermetically sealed from the surrounding environment to protect the storage cells of the battery from moisture and contaminants. However, in the case of a large pressure difference, such as in the case of mountain travel, in the case of flight transportation, or the like, pressure equalization is desirable or necessary. A pressure equalization element is known from EP2815637B1, with which the battery housing can be provided with a pressure equalization capability.
Disclosure of Invention
The object of the invention is to provide a housing, in particular a battery housing, with improved pressure equalization capability. This object is achieved by a battery housing according to claim 1, a pressure equalization element according to claim 9, a drive battery according to claim 12 and a motor vehicle according to claim 13. Advantageous developments of the invention are the subject of the dependent claims.
According to an embodiment of the present invention, there is provided a battery case having: an inlet valve that allows flow through into the battery housing and prevents flow out of the battery housing; a drain valve that allows flow through from the battery housing and prevents flow into the battery housing; an inlet diaphragm arranged in series with the inlet valve; and a discharge diaphragm arranged in series with the discharge valve. The inlet and outlet paths can be designed independently of one another by means of separate valves for the inlet and outlet and their associated diaphragms. For example in terms of pressure differences from which the respective valves switch, liquid permeability of the membrane, etc. Therefore, the pressure balance characteristics of the battery case can be improved over the prior art.
According to another embodiment of the invention, the inlet membrane has a different permeability than the outlet membrane. This also provides the advantage that the characteristics of the incoming air flow can be defined differently from the characteristics of the outgoing air flow.
According to another embodiment of the invention, the inlet membrane has a lower permeability than the outlet membrane. In this way, for example, the input of liquid or moisture into the battery housing can be prevented or prevented to the greatest extent, while the output of liquid or moisture from the battery housing to the surroundings can be achieved.
According to a further embodiment of the invention, the inlet valve and/or the outlet valve is/are only allowed to pass from a certain pressure difference. Thereby, the battery housing can remain tightly closed most of the time and pressure equalization is only performed when pressure equalization is indeed necessary, for example to prevent damage at the battery housing.
According to another embodiment of the invention, the inlet diaphragm is arranged on the outwardly directed side of the inlet valve and the outlet diaphragm is arranged on the outwardly directed side of the outlet valve.
According to a further embodiment of the invention, the inlet valve, the outlet valve, the inlet diaphragm and the outlet diaphragm are combined in a pressure equalization element as a structural unit, and the pressure equalization element is arranged in a wall of the battery housing.
According to another embodiment of the invention, the pressure equalization element is sealingly mounted with respect to the battery housing.
According to a further embodiment of the invention, the inlet diaphragm and the outlet diaphragm are covered on their sides facing away from the respective valve with a common cover cap, which has an opening.
Furthermore, the invention provides a pressure equalization element for a housing, having: an inlet valve that allows flow therethrough in only a first direction; a discharge valve allowing flow therethrough only in a second direction opposite to the first direction; an inlet diaphragm arranged in series with the inlet valve; and a discharge diaphragm arranged in series with the discharge valve. The pressure equalization element offers the already mentioned advantage that the inlet and outlet paths can be designed independently of one another by means of separate valves for inlet and outlet and their associated diaphragms.
According to another embodiment of the pressure balancing element, the inlet membrane has a different permeability than the outlet membrane.
According to a further embodiment of the pressure equalization element, the inlet valve and/or the outlet valve is/are only allowed to pass from a specific pressure difference. The housing can thus remain tightly closed most of the time and pressure equalization is only performed when pressure equalization is indeed necessary, for example to prevent damage at the housing.
The invention further provides a drive battery for a motor vehicle, comprising a plurality of battery cells electrically connected to one another and a battery housing that encloses the battery cells.
The invention further provides a motor vehicle having such a battery housing or such a drive battery.
Drawings
Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. The following are shown in the drawings:
Fig. 1 schematically shows a drive battery according to an embodiment of the invention; and
Fig. 2 schematically shows a pressure equalization element of the drive battery in fig. 1.
Detailed Description
Fig. 1 schematically shows a drive battery 1 according to an embodiment of the invention. The drive battery 1 is mounted in a motor vehicle, not shown. The motor vehicle is an electrified motor vehicle which is at least temporarily driven purely by electricity. The motor vehicle is in particular a passenger vehicle.
The driving battery 1 has a plurality of battery cells 2 electrically connected to each other. For example, the battery cells 2 can be electrically connected in series and/or in parallel. The battery cell 2 is an electrochemical-based cell for storing and providing electrical energy at least for driving the motor vehicle, i.e. for powering one or more drive motors. The battery cell 2 may be a cylindrical cell or (as exemplarily shown) a square cell.
The battery cells 2 are enclosed in a battery housing 3, which separates the battery cells 2 from the environment of the battery housing 3 in a fluid-tight or tight manner. The battery housing 3 comprises a square wall 5, in which one or more pressure equalization elements 4 are introduced.
Fig. 2 schematically shows a pressure equalization element 4, which is arranged in a wall 5 of the battery housing 3. The pressure equalization element 4 has an inlet valve 6 in the form of a one-way valve which permits a flow through into the battery housing 3 (i.e. from the outside to the inside), as shown by the arrows, and prevents a flow out of the battery housing 3 (i.e. from the inside to the outside). Furthermore, the pressure equalization element 4 has a discharge valve 7 in the form of a one-way valve, which permits a flow through (as shown by the arrows) out of the battery housing 3 (i.e. from the inside to the outside) and prevents a flow into the battery housing 3 (i.e. from the outside to the inside). The inlet valve 6 and the outlet valve 7 may be of the same design or of different designs. These valves can be configured, for example, as mushroom-type valves (as shown), in particular as elastomeric mushroom-type valves, ball valves, valves with bistable springs or valves with linear/progressive springs. The valve is configured as a reversibly openable and closable valve. The inlet valve 6 and the outlet valve 7 are in particular respectively opened only when a defined pressure difference between the interior of the battery housing 3 and the surroundings is exceeded and closed again below said defined pressure difference. The necessary pressure differences of the inlet valve 6 and the outlet valve 7 can have the same value or different pressure differences can be determined depending on the valve design.
The inlet valve 6 is arranged in an inlet flow channel 8 and the outlet valve 7 is arranged in an outlet flow channel 9, which extend independently of each other. An inlet diaphragm 10 is arranged in series with the inlet valve 6. The inlet diaphragm is arranged upstream of the inlet valve 6. In other words, the inlet diaphragm 10 is arranged on the outwardly directed side of the inlet valve 6. Thus, as with the inlet valve 6, an inlet diaphragm 10 is also arranged in the inlet flow channel 8. A discharge diaphragm 11 is arranged in series with the discharge valve 7. The discharge diaphragm is arranged downstream of the discharge valve 7. In other words, the discharge diaphragm 11 is arranged on the outwardly directed side of the discharge valve 7. Thus, as with the discharge valve 7, the discharge diaphragm 11 is also disposed in the discharge flow passage 9. The inlet diaphragm 10 and the outlet diaphragm 11 are separate diaphragms. The membrane is made of Polytetrafluoroethylene (PTFE) or nonwoven, for example. The membrane is configured to be waterproof or watertight and permeable to gas or air. The diaphragms 10 and 11 may be identical in construction. In particular, however, the inlet membrane 10 has a different permeability than the outlet membrane 11. The permeability herein means the penetrability of a liquid. In particular, the permeability of the inlet membrane 10 is lower than the permeability of the outlet membrane 11. This has the advantage that liquid components are prevented or reduced from being fed into the battery housing 3 and that as little air as possible reaches the interior of the battery housing 3. In contrast, it is desirable for the discharge membrane 11 to be able to conduct out liquid components that may be present in the battery housing 3 from the interior of the battery housing 3. The different permeabilities can be achieved, for example, by the pore size in PTFE, the layer thickness of the membrane or the number of layers of the membrane. For example, lower permeability may be achieved for the incoming membrane by smaller pore size in PTFE or additional coatings.
The inlet diaphragm 10 and the outlet diaphragm 11 are covered by a common covering cap 12, which has at least one opening 13 through which air flowing in through the inlet flow duct 8 is sucked and through which air flowing out through the outlet flow duct 9 is discharged, as indicated by the two oppositely extending arrows.
The pressure equalization element 4 or the cover 12 is sealed in a fluid-tight manner against the wall 5 of the battery housing 3 by means of a seal 14.
While the invention has been illustrated and described in detail in the drawings and foregoing description, the same is to be considered as illustrative and not restrictive in character, and it is not intended to limit the invention to the disclosed embodiments. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.
Claims (13)
1. A battery case (3) having:
An inlet valve (6) which allows a flow through into the battery housing (3) and prevents a flow out of the battery housing (3);
-a drain valve (7) allowing a flow through from the battery housing (3) and blocking a flow into the battery housing (3);
an inlet diaphragm (10) arranged in series with the inlet valve (6); and
-A discharge diaphragm (11) arranged in series with the discharge valve (7).
2. Battery housing (3) according to claim 1, wherein the inlet membrane (10) has a different permeability than the outlet membrane (11).
3. Battery housing (3) according to claim 2, wherein the inlet membrane (10) has a lower permeability than the outlet membrane (11).
4. Battery housing (3) according to any of the preceding claims, wherein the inlet valve (6) and/or the outlet valve (7) are only allowed to pass from a certain pressure difference.
5. Battery housing (3) according to any of the preceding claims, wherein the inlet membrane (10) is arranged on the outwardly directed side of the inlet valve (6) and the outlet membrane (11) is arranged on the outwardly directed side of the outlet valve (7).
6. Battery housing (3) according to any of the preceding claims, wherein the inlet valve (6), the outlet valve (7), the inlet diaphragm (10) and the outlet diaphragm (11) are combined in a pressure equalization element (4) as a structural unit, and the pressure equalization element (4) is arranged in a wall (5) of the battery housing (3).
7. Battery housing (3) according to claim 6, wherein the pressure equalization element (4) is sealingly mounted with respect to the battery housing (3).
8. Battery housing (3) according to any of the preceding claims, wherein the inlet membrane (10) and the outlet membrane (11) are covered on their sides facing away from the respective valve with a common cover cap (12) having an opening (13).
9. Pressure equalization element (4) for a housing, having:
An inlet valve (6) which allows flow therethrough only in a first direction;
A discharge valve (7) which permits flow therethrough only in a second direction opposite to the first direction;
an inlet diaphragm (10) arranged in series with the inlet valve (6); and
-A discharge diaphragm (11) arranged in series with the discharge valve (7).
10. Pressure equalization element (4) according to claim 9, wherein the inlet membrane (10) has a different permeability than the outlet membrane (11).
11. Pressure equalization element (4) according to claim 9 or 10, wherein the inlet valve (6) and/or the outlet valve (7) are/is only allowed to flow through from a certain pressure difference.
12. A drive battery (1) for a motor vehicle, the drive battery having:
A plurality of battery cells (2) electrically connected to each other; and
The battery housing (3) according to any one of claims 1 to 8, which encapsulates the battery cell (2).
13. Motor vehicle with a battery housing (3) according to any one of claims 1 to 8 or with a drive battery (1) according to claim 12.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021126075.2 | 2021-10-07 | ||
| DE102021126075.2A DE102021126075A1 (en) | 2021-10-07 | 2021-10-07 | Battery housing with pressure equalization function, pressure equalization element, drive battery and motor vehicle |
| PCT/EP2022/075627 WO2023057184A1 (en) | 2021-10-07 | 2022-09-15 | Battery housing having a pressure equalization function, pressure equalization element, drive battery, and motor vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117916936A true CN117916936A (en) | 2024-04-19 |
Family
ID=83507503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202280059975.4A Pending CN117916936A (en) | 2021-10-07 | 2022-09-15 | Battery housing with pressure equalization function, pressure equalization element, drive battery and motor vehicle |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN117916936A (en) |
| DE (1) | DE102021126075A1 (en) |
| WO (1) | WO2023057184A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BR112019009469A2 (en) | 2016-11-09 | 2019-07-30 | Pulmotect Inc | methods and compositions for adaptive immune modulation |
| DE102022211113A1 (en) | 2022-10-20 | 2024-04-25 | Volkswagen Aktiengesellschaft | Pressure equalization element for a battery system, vehicle battery system and vehicle with a battery system and pressure equalization element |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006334537A (en) * | 2005-06-03 | 2006-12-14 | Nitto Denko Corp | Aeration member, aeration member kit, ventilation basket using these, and ventilation tank |
| DE102012202103A1 (en) | 2012-02-13 | 2013-08-14 | Robert Bosch Gmbh | Pressure compensation element with a membrane, housing, battery cell module and motor vehicle |
| US20210159473A1 (en) * | 2019-11-26 | 2021-05-27 | GM Global Technology Operations LLC | Battery pack water condensation mitigation |
| DE102020204436A1 (en) * | 2020-04-06 | 2021-10-07 | Elringklinger Ag | Valve device and electrochemical system |
-
2021
- 2021-10-07 DE DE102021126075.2A patent/DE102021126075A1/en active Pending
-
2022
- 2022-09-15 WO PCT/EP2022/075627 patent/WO2023057184A1/en unknown
- 2022-09-15 CN CN202280059975.4A patent/CN117916936A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023057184A1 (en) | 2023-04-13 |
| DE102021126075A1 (en) | 2023-04-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination |