WO2024256629A1 - Batteriegehäuse und fahrzeugbatterie - Google Patents
Batteriegehäuse und fahrzeugbatterie Download PDFInfo
- Publication number
- WO2024256629A1 WO2024256629A1 PCT/EP2024/066532 EP2024066532W WO2024256629A1 WO 2024256629 A1 WO2024256629 A1 WO 2024256629A1 EP 2024066532 W EP2024066532 W EP 2024066532W WO 2024256629 A1 WO2024256629 A1 WO 2024256629A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- housing
- battery
- adhesive film
- mandrel element
- housing wall
- 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.)
- Ceased
Links
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
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/342—Non-re-sealable arrangements
- H01M50/3425—Non-re-sealable arrangements in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
-
- 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
Definitions
- the present invention relates to a battery case for accommodating a plurality of battery cells to form a vehicle battery and a vehicle battery.
- Degassing devices are constructed in several parts. They comprise a frame or structural body that is attached to a housing wall. Additional components are attached in and on the frame, which, when excess pressure occurs, cause a membrane element of the degassing device, which is closed under normal operating pressures in the battery, to open at a predetermined excess pressure.
- Such multi-part degassing devices which are attached to the battery housing as a separate subassembly, are known, among others, from DE 102020 134 548 A1, DE 10 2021 106 903 A1, DE 102021 123 031 A1 or DE 102019 218 456 A1.
- an object of the present invention to provide an improved battery housing for accommodating a plurality of battery cells to form a vehicle battery, as well as an improved vehicle battery.
- the object is achieved by a battery housing for accommodating a plurality of battery cells to form a vehicle battery with the features of claim 1.
- a battery housing for accommodating a plurality of battery cells for forming a vehicle battery, comprising at least one housing wall defining a housing interior with a degassing opening for discharging gases from the housing interior.
- the vent opening is closed by an adhesive film bonded to the housing wall and a mandrel element is provided for perforating the adhesive film in the event of excess pressure occurring during thermal runaway of a battery cell.
- the adhesive film is therefore glued directly to the housing wall, or rather directly bonded to it, so that additional components can be saved and the degassing opening can be securely closed in this way.
- the adhesive film seals the degassing opening reliably due to the bonding to the housing wall. No other parts are therefore provided or involved in closing the degassing opening other than the adhesive film.
- the mandrel element can be arranged in the region of the degassing opening in such a way that it perforates the adhesive film when the adhesive film is deformed when the overpressure occurs, which corresponds to a pressure of a predetermined level.
- the perforation allows gas to be exchanged from the inside of the battery casing to the environment.
- the perforation can optionally function as a predetermined breaking point, whereby the pressure exerted on the adhesive film in the area of the degassing opening due to the excess pressure inside the battery casing can enlarge the perforation in the adhesive film.
- the perforation can cause the adhesive film to burst or tear, creating an opening in the adhesive film that is significantly larger than the perforation itself.
- the mandrel element can be arranged on a cross strut extending transversely to the housing wall on a side of the housing wall opposite the housing interior, wherein the mandrel element can be formed in particular by a cutout made in the cross strut.
- the cross strut can optionally extend on the side of the housing wall opposite the housing interior.
- the cross strut can have a base on the housing wall or be connected to the housing wall, for example in one piece.
- the mandrel element can be formed integrally with the housing wall.
- the mandrel element can be arranged immovably opposite the degassing opening. In other words, no moving mechanical components are required that would cause the degassing opening to open when overpressure occurs. Rather, it is a simple-to-manufacture and robust system that functions almost passively.
- a tip of the mandrel element can be arranged at a predetermined distance from the plane of the adhesive film defined by the degassing opening in the pressure-free state. Since the adhesive film in the area of the degassing opening bulges outwards more or less depending on the pressure present inside the battery housing, by specifying a suitable distance for the tip of the mandrel element, it can be achieved that the adhesive film is perforated at a predetermined pressure.
- the adhesive film can be glued to the inside of the housing wall facing the inside of the housing.
- the mandrel element can be arranged on a side of the housing wall opposite the housing interior.
- the mandrel element can be arranged such that it comes into contact with the adhesive film when the overpressure inside the housing reaches a predetermined value.
- the adhesive film can be designed in such a way that it deforms in the direction of the mandrel element due to an overpressure present inside the housing, for example elastically and/or plastically deforms.
- the battery housing can comprise a profile structure, for example a die-cast profile structure, optionally an extruded profile structure, wherein the housing wall and the mandrel element and optionally additionally the cross strut are formed in the profile structure.
- the housing wall can be formed in one piece with the mandrel element.
- the housing wall, the cross brace and the mandrel element can be formed in one piece.
- the housing wall and the cross strut can be formed in the one-piece profile structure, and the mandrel element can be formed integrally on the cross strut.
- a vehicle battery comprising a plurality of battery cells and a battery housing enclosing the plurality of battery cells according to one of the preceding embodiments.
- Figure 1 shows schematically a perspective side view of a partial area of a battery housing
- Figure 2 schematically shows a further perspective side view of the partial area of the battery housing from Figure 1;
- Figure 3 shows a schematic sectional view through the battery housing from Figure 1.
- Figure 1 schematically shows a perspective side view of a partial area of a battery housing 1. The view is directed from the interior of the battery housing onto the partial area.
- the battery housing 1 comprises at least one housing wall 2 defining a housing interior with a degassing opening 4 for discharging gases from the housing interior.
- the degassing opening 4 serves to dissipate an undesirable overpressure in the housing interior at a defined point on the housing wall 2 from the battery housing 1, for example into the environment.
- An undesirable overpressure inside the housing can occur, for example, if a battery cell experiences thermal runaway. Such overpressure typically occurs suddenly and, if released into the environment in an undefined manner, could lead to the battery housing 1 breaking open or bursting at an unpredictable location and thus pose a risk to people.
- the degassing opening 4 is closed with an adhesive film 6.
- the adhesive film 6 is glued directly to the housing wall 2.
- the adhesive film 6 seals the degassing opening 4 so that the battery housing 1 can be gas-tight and liquid-tight. Sealing is important in order to protect the electrical and electronic components housed inside the housing from environmental influences. For example, moisture should be prevented from penetrating into the housing in order to avoid corrosion and short circuits. Furthermore, the penetration of Foreign bodies such as dust or dirt must be avoided in order to prevent the formation of short circuits.
- the battery housing 1 can be hermetically sealed against the environment.
- a separate pressure equalization device can be provided, which is not described further here.
- the pressure equalization device can, however, be provided in addition to the degassing opening 4 described here.
- Figure 2 schematically shows a further perspective side view of the partial area of the battery housing 1 from Figure 1, wherein the adhesive film 6 is hidden in order to provide a view of the venting opening 4.
- the battery housing 1 comprises a mandrel element 8, which is intended to perforate the adhesive film 6 in the event of an overpressure occurring during thermal runaway of a battery cell.
- the mandrel element 8 is arranged in the area of the degassing opening 4 in such a way that it perforates the adhesive film 6 when the adhesive film 6 is deformed when the overpressure occurs. In this way, the degassing opening 4 is then released and the gas flow can escape from the housing interior into the environment.
- the adhesive film 6 When an overpressure occurs, the adhesive film 6 gradually bulges out and then, at the predetermined overpressure, hits the mandrel element 8 so that the adhesive film 6 is then perforated. In other words, when an overpressure occurs, a part of the bulged adhesive film 8 then moves towards the mandrel element 8 so that the adhesive film 8 then perforates itself on the mandrel element 8 when the predetermined overpressure is reached.
- the adhesive film 8 is designed to be elastic in such a way that when the overpressure occurs, it is deliberately deformed to such an extent that the perforation occurs at the predetermined overpressure.
- the mandrel element 8 is arranged here, for example, on a cross strut 10 extending transversely to the housing wall 2.
- the mandrel element 8 is formed by a cutout 12 made in the cross strut 10.
- the cross strut supporting the mandrel element 8 can be formed integrally with the housing wall 2.
- the mandrel element 8 is then formed integrally with the housing wall 2.
- the mandrel element 8 is accordingly stationary and immobile relative to the housing wall 2. In particular, the mandrel element 8 does not move relative to the degassing opening 4 or to a plane 14 defined by the degassing opening 4.
- the housing wall 2 and the cross strut 2 can be part of a one-piece profile structure, as shown by way of example in Figures 2 and 3.
- the adhesive film 6 is glued to the inner side of the housing wall 2 facing the housing interior and the mandrel element 8 is arranged on the outer side with respect to the housing wall 8.
- Figure 3 shows a schematic sectional view 1 through the battery housing from Figure 1 at the level of the degassing opening 4 in the middle of the cross strut 10.
- the formation of the mandrel element 8 can be seen by means of the cutout 12 made in the cross strut 10.
- a tip 9 of the mandrel element 8 is arranged at a predetermined distance 16 from a plane 14 of the adhesive film 6 defined by the degassing opening 4 in the unpressurized state.
- the mandrel element 8, more precisely its tip 9, is arranged such that it comes into contact with the adhesive film 6 when the overpressure inside the housing reaches a predetermined value and a part of the adhesive film 6 has bulged accordingly towards the tip 9.
- the adhesive film 6 is designed to deform towards the mandrel element 8 due to an excess pressure present inside the housing, optionally essentially elastically in this case.
- the adhesive film 6 can thus contribute to a pressure equalization between the inside and outside of the housing until the tip 9 is reached, i.e. until the predetermined distance is overcome.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Gas Exhaust Devices For Batteries (AREA)
Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020257040785A KR20260007262A (ko) | 2023-06-14 | 2024-06-14 | 배터리 하우징 및 차량 배터리 |
| CN202480039427.4A CN121312004A (zh) | 2023-06-14 | 2024-06-14 | 电池壳体和车辆电池 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102023115563.6A DE102023115563A1 (de) | 2023-06-14 | 2023-06-14 | Batteriegehäuse und Fahrzeugbatterie |
| DE102023115563.6 | 2023-06-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2024256629A1 true WO2024256629A1 (de) | 2024-12-19 |
Family
ID=91582060
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2024/066532 Ceased WO2024256629A1 (de) | 2023-06-14 | 2024-06-14 | Batteriegehäuse und fahrzeugbatterie |
Country Status (4)
| Country | Link |
|---|---|
| KR (1) | KR20260007262A (de) |
| CN (1) | CN121312004A (de) |
| DE (1) | DE102023115563A1 (de) |
| WO (1) | WO2024256629A1 (de) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120282499A1 (en) * | 2009-10-05 | 2012-11-08 | Li-Tec Battery Gmbh | Electrochemical cell |
| DE102013215552A1 (de) * | 2013-08-07 | 2015-02-12 | Robert Bosch Gmbh | Druckfreigabeeinrichtung zum Schutz eines Batteriesystems oder einer galvanischen Zelle vor schädigendem Überdruck sowie Batteriesystem, galvanische Zelle und Zelldeckel mit einer Druckfreigabeeinrichtung |
| DE102019218456A1 (de) | 2019-11-28 | 2021-06-02 | Elringklinger Ag | Druckausgleichssystem und elektrochemisches System |
| DE102020134548A1 (de) | 2020-12-22 | 2022-06-23 | Konzelmann Gmbh | Notentgasungsvorrichtung |
| DE102021106903A1 (de) | 2021-03-19 | 2022-09-22 | Konzelmann Gmbh | Druckausgleichsvorrichtung |
| US20230021740A1 (en) * | 2020-08-04 | 2023-01-26 | Lg Energy Solution, Ltd. | Battery module, battery pack comprising same, and automobile |
| DE102021123031A1 (de) | 2021-09-06 | 2023-03-09 | Mann+Hummel Gmbh | Entgasungseinheit und Elektronikgehäuse, insbesondere Batteriegehäuse, sowie Herstellverfahren für eine Entgasungseinheit |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102019220391A1 (de) * | 2019-12-20 | 2021-06-24 | Volkswagen Aktiengesellschaft | Notentgasungsanordnung für die Notentgasung eines Akkumulators eines elektrisch angetriebenen Kraftfahrzeugs |
-
2023
- 2023-06-14 DE DE102023115563.6A patent/DE102023115563A1/de active Pending
-
2024
- 2024-06-14 WO PCT/EP2024/066532 patent/WO2024256629A1/de not_active Ceased
- 2024-06-14 CN CN202480039427.4A patent/CN121312004A/zh active Pending
- 2024-06-14 KR KR1020257040785A patent/KR20260007262A/ko active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120282499A1 (en) * | 2009-10-05 | 2012-11-08 | Li-Tec Battery Gmbh | Electrochemical cell |
| DE102013215552A1 (de) * | 2013-08-07 | 2015-02-12 | Robert Bosch Gmbh | Druckfreigabeeinrichtung zum Schutz eines Batteriesystems oder einer galvanischen Zelle vor schädigendem Überdruck sowie Batteriesystem, galvanische Zelle und Zelldeckel mit einer Druckfreigabeeinrichtung |
| DE102019218456A1 (de) | 2019-11-28 | 2021-06-02 | Elringklinger Ag | Druckausgleichssystem und elektrochemisches System |
| US20230021740A1 (en) * | 2020-08-04 | 2023-01-26 | Lg Energy Solution, Ltd. | Battery module, battery pack comprising same, and automobile |
| DE102020134548A1 (de) | 2020-12-22 | 2022-06-23 | Konzelmann Gmbh | Notentgasungsvorrichtung |
| DE102021106903A1 (de) | 2021-03-19 | 2022-09-22 | Konzelmann Gmbh | Druckausgleichsvorrichtung |
| DE102021123031A1 (de) | 2021-09-06 | 2023-03-09 | Mann+Hummel Gmbh | Entgasungseinheit und Elektronikgehäuse, insbesondere Batteriegehäuse, sowie Herstellverfahren für eine Entgasungseinheit |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102023115563A1 (de) | 2024-12-19 |
| CN121312004A (zh) | 2026-01-09 |
| KR20260007262A (ko) | 2026-01-13 |
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