Housing, in particular for an energy store
Patent Information
- Application Number
- EP2023821302
- Authority / Receiving Office
- EP · EP
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2022-12-23
- Filing Date
- 2023-12-11
- Publication Date
- 2025-10-29
AI Technical Summary
Existing energy storage device housings face challenges in protecting against direct contact and rapid pressure increases during thermal runaway, while also requiring efficient manufacturing processes for ventilation.
A housing design featuring a ventilation opening that spans through the outer, partition, and inner wall sections, allowing for overlapping recesses to be produced in a single step, reducing processing time and preventing direct access through the inner wall, with optional circular ring recess sections and holding sections for enhanced structural integrity and venting.
The design effectively manages internal pressure equalization with the ambient pressure, prevents rapid pressure increases during thermal runaway, and simplifies the manufacturing process by allowing simultaneous production of recesses, enhancing protection and efficiency.
Smart Images
Figure 1.1
Abstract
Description
[0001] HOUSING, ESPECIALLY FOR AN ENERGY STORAGE DEVICE
[0002] DESCRIPTION
[0003] The present invention relates to a housing, in particular for an energy storage device of an electrical or electromechanical drive unit, in particular a battery housing of an electrical or electromechanical drive unit.
[0004] Energy storage enclosures are designed to house the energy storage device and protect it from environmental influences. Furthermore, energy storage enclosures can include interfaces for transferring electrical energy between individual energy storage devices or to a load. Furthermore, energy storage enclosures must have venting devices to equalize the internal pressure within the enclosure to the ambient pressure and prevent an excessively rapid and excessive pressure increase within the enclosure in the event of thermal runaway of the energy storage device.
[0005] WO 2010 / 012339 A1 discloses a battery, particularly for use in a vehicle. The battery comprises a battery housing with an opening for reducing internal pressure. A tube extension with labyrinth-like formations for discharging outgases is arranged in the area of the opening.
[0006] Proceeding from this, the object of the present invention is to provide a housing, in particular for an energy storage device of an electrical or electromechanical drive unit, in particular a battery housing of an electrical or electromechanical drive unit, which comprises a ventilation device which ensures protection against direct contact with the energy storage device accommodated in the housing and which is easy to manufacture.
[0007] To achieve the object, a housing, in particular for an energy storage device, is proposed, comprising: a housing wall comprising a housing outer wall section, a housing partition wall section and a housing inner wall section, wherein a venting opening for venting the housing extends through the housing outer wall section, the housing partition wall section and the housing inner wall section along a longitudinal axis, and wherein the housing outer wall section and the housing inner wall section are spaced apart from one another in the axial direction and the housing partition wall section is arranged axially between the housing outer wall section and the housing inner wall section, and wherein the venting opening is formed at least in sections by a recess in the housing partition wall section, which is arranged in the axial direction in complete overlap with the housing inner wall section, and a recess in the housing outer wall section,wherein the recess in the housing partition wall section is arranged completely in axial overlap with the recess in the housing outer wall section.,
[0008] The housing according to the invention has the advantage that, by arranging the recess in the housing partition wall section in complete axial overlap with the recess in the housing outer wall section, these recesses can be produced in a single work step and using the same tool. This significantly reduces the processing time for the vent. Furthermore, penetration through the vent opening through the housing inner wall section is prevented.
[0009] In one possible embodiment of the housing, the housing inner wall section can have a recess which is arranged in the axial direction without overlapping the recess in the housing partition wall section.
[0010] In a further possible embodiment of the housing, the recess in the housing partition wall section can comprise a plurality of recess sections. The plurality of recess sections can be arranged rotationally symmetrically about the longitudinal axis. Each of the plurality of recess sections can be arranged in the axial direction in complete overlap with the housing inner wall section and with the recess in the housing outer wall section. An embodiment of the housing is conceivable in which the recess or the plurality of recess sections in the housing partition wall section can comprise a circular ring recess section. The circular ring recess section can be arranged in the form of a circular ring segment around the longitudinal axis. The circular ring recess section can also be delimited by a first outer diameter and a first inner diameter.
[0011] A further embodiment of the housing is conceivable in which the recess in the housing outer wall section can comprise one or more circular ring recess sections. The one or more circular ring recess sections can be arranged in the form of a circular ring segment around the longitudinal axis. A plurality of circular ring recess sections can be provided, which are arranged spaced apart from one another in a circumferential direction around the longitudinal axis. The one or more circular ring recess sections can define a circular segment-shaped section of the outer contour of the recess in the housing outer wall section with a second outer diameter.
[0012] In a further possible embodiment of the housing, the recess in the housing outer wall section can be designed such that one or more holding sections of the housing outer wall section extend from radially outside to radially inside. The one or more holding sections can have a circular segment-shaped section of an outer contour of the recess in the housing outer wall section with a third outer diameter. The second outer diameter can be larger than the third outer diameter. Alternatively or in combination, the first outer diameter can be equal to the second outer diameter. A plurality of holding sections can be provided, which are arranged spaced apart from one another in a circumferential direction around the longitudinal axis.
[0013] It is understood by the person skilled in the art that the outer contour of a recess corresponds to the inner contour of the wall that defines the recess.
[0014] REPLACEMENT LEAF (RULE 26) In a possible embodiment of the housing, a circular ring recess section of the recess in the housing outer wall section can be delimited in the circumferential direction on a first side by a first holding section and on the opposite second side by a second holding section.
[0015] In a further possible embodiment, an ambient chamber can be formed between the housing outer wall section and the housing partition wall section. The ambient chamber can be delimited by a first envelope arranged cylindrically around the longitudinal axis and having a fourth outer diameter. The housing outer wall section can be arranged in the axial direction, at least in sections, overlapping the ambient chamber.
[0016] An inner chamber may be formed between the housing partition wall section and the housing inner wall section. The inner chamber may be bounded by a second envelope arranged cylindrically around the longitudinal axis and having a fifth outer diameter.
[0017] The fourth outer diameter may be larger than the first outer diameter, the second outer diameter, and / or the third outer diameter. Alternatively, or in combination, the fifth outer diameter may be equal to the first outer diameter and / or the second outer diameter.
[0018] In a further possible embodiment, a venting element can be inserted into the venting opening. The housing outer wall section can have connecting means via which the venting element can be connected or is connected to the housing outer wall section. The housing outer wall section is in particular deviating from annular, so that the venting element can be connected or is connected to the housing outer wall section in a form-fitting and / or force-fitting manner, at least in one direction of rotation about the longitudinal axis. In particular, the venting element can comprise one or more clamping sections which are arranged so as to be clamped or are clamped to the housing outer wall section. The one or more
[0019] REPLACEMENT LEAF (RULE 26) Clamping sections can be arranged at least in sections in the ambient chamber and engage behind one or more holding sections of the housing outer wall section.
[0020] An inventive design of the housing is explained below with reference to the drawings. Herein:
[0021] Figure 1 is a perspective view of a housing for a battery according to the invention;
[0022] Figure 2 shows a wall element of the housing from Figure 1 in a perspective view;
[0023] Figure 3 shows the wall element from Figure 2 in a front view;
[0024] Figure 4 is a detailed view of the wall element of Figure 2 according to detail IV of Figure 3;
[0025] Figure 5 is a sectional view of the wall element of Figure 2 along section line VV of Figure 4;
[0026] Figure 6 is a sectional view of the wall element of Figure 2 along section line VIVI of Figure 5;
[0027] Figure 7 is a sectional view of the wall element of Figure 2 along section line VII-VII of Figure 5;
[0028] Figure 8 is a view analogous to the view in Figure 2 with the venting element inserted; and
[0029] Figure 9 is a view analogous to the view in Figure 5 with the venting element inserted.
[0030] REPLACEMENT SHEET (RULE 26) Figures 1 to 9, which are described together below, show a housing 1 according to the invention for a battery of an electric motor drive unit. The housing 1 comprises an intermediate unit 2, a terminal unit 6 and a receiving unit 10. The terminal unit 6 is connected to the intermediate unit 2 by means of screws distributed over the circumference, so that a first housing chamber is formed between the terminal unit 6 and the intermediate unit 2. The receiving unit 10 is connected to the intermediate unit 2 by means of screws distributed over the circumference, so that a second housing chamber is formed between the receiving unit 10 and the intermediate unit 2. A first energy store in the form of a battery is accommodated in the first housing chamber. A second energy store, also in the form of a battery, is accommodated in the second housing chamber.
[0031] The intermediate unit 2 comprises an intermediate element 3 having a prismatic basic shape, with an H-shaped base extending along a longitudinal axis of the housing. The intermediate unit 2 further comprises a first cover element 4 and a second cover element 5. The first cover element 4 is firmly connected to the intermediate element 3 on a first end face of the housing 1. The second cover element 5 is firmly connected to the intermediate element 3 on the opposite second end face of the housing 1.
[0032] The closure unit 6 comprises a closure element 7, which has a prismatic basic shape with a U-shaped base extending in the direction of the longitudinal axis. The closure unit 7 comprises a first cover element 8 and a second cover element 9. The first cover element 8 is firmly connected to the closure element 7 on the first end face of the housing 1. The second cover element 9 is firmly connected to the closure element 7 on the second, opposite end face of the housing 1.
[0033] The receiving unit 10 comprises a receiving element 11 that has a prismatic basic shape with a U-shaped base. The receiving unit 10 comprises a first cover element 12 and a second cover element 13. The first cover element 12 is fixedly connected to the receiving element 11 on the first end face of the housing 1.
[0034] REPLACEMENT BLADE (RULE 26). The second cover element 13 is firmly connected to the receiving element 11 on the second opposite end face of the housing 1.
[0035] The first cover elements 4, 8, 12 thus form a first housing wall 14 on the first end face of the housing 1, and the second cover elements 5, 9, 13 form a second housing wall 14' on the second end face of the housing 1. The second housing wall 14' has, in the second cover element 5 of the intermediate unit 2, an opening for a coolant connection 15, an opening for an interface 16 of the positive pole of the batteries, an opening for an interface 17 of the negative pole of the batteries, and a vent opening 19 for a vent 18.
[0036] The vent opening 19 adjusts the internal pressure in the housing to the ambient pressure, preventing an excessively rapid and excessive pressure increase inside the housing during thermal runaway of the batteries. Furthermore, the vent opening 19 is designed such that a venting element 35 can be mounted therein, as shown in particular in Figures 8 and 9.
[0037] The vent opening 19 extends along a longitudinal axis L19 through the second housing wall 14' or through the second cover element 5. The longitudinal axis L19 extends parallel to the longitudinal axis of the housing 1. The second housing wall 14' or the second cover element 5 has, in the region of the vent opening 19, a housing outer wall section 20, a housing partition wall section 25, and a housing inner wall section 29.
[0038] The housing outer wall section 20 delimits the second housing wall 14' in the direction of an environment of the housing 1. The housing inner wall section 29 delimits the second housing wall 14' in the direction of the interior of the housing 1, in particular in the direction of the first and / or the second housing chamber.
[0039] The housing outer wall section 20 is axially spaced from the housing partition wall section 25 with respect to the longitudinal axis L19. Between the housing outer wall section
[0040] REPLACEMENT BLADE (RULE 26) An ambient chamber 33 is arranged between the housing section 20 and the housing partition wall section 25. The ambient chamber 33 is designed as a right cylinder that extends coaxially to the longitudinal axis L19 and has a diameter D33. In other words, the ambient chamber 33 is bounded by an envelope arranged cylindrically around the longitudinal axis L19 and having a diameter D33. In this case, the diameter D33 is larger than the diameter D27, the diameter D22, and the diameter D23.
[0041] The housing partition wall section 25 is in turn axially spaced from the housing inner wall section 29 with respect to the longitudinal axis L19. In other words, the housing partition wall section 25 is arranged between the housing outer wall section 20 and the housing inner wall section 29. An inner chamber 34 is arranged between the housing partition wall section 25 and the housing inner wall section 29. The inner chamber 34 is designed as a right cylinder that extends coaxially to the longitudinal axis L19 and has a diameter D34. In other words, the inner chamber 34 is delimited by an envelope arranged cylindrically around the longitudinal axis L19 and has a diameter D34. The diameter D34 is greater than or equal to the diameter D27 and the diameter D22.
[0042] The housing outer wall section 20 comprises a recess 21 that extends coaxially to the longitudinal axis L19 through the housing outer wall section 20. As can be seen in particular from the combined view of Figures 4 and 6, the recess 21 is defined by the superposition of a central circular recess section 23 with three circular ring recess sections 22, 22', 22". In other words, the housing outer wall section 20 is configured in a manner other than circular.
[0043] The circular ring recess sections 22, 22', 22" are arranged rotationally symmetrically with respect to the longitudinal axis L19 at equal distances from one another. The circular ring recess sections 22, 22', 22" are each formed as a circular ring segment around the longitudinal axis L19, which extends in a direction parallel to the longitudinal axis L19. Thus, the circular ring recess sections 22, 22', 22" each describe a circular segment-shaped section of the outer contour of the recess 21, which
[0044] REPLACEMENT BLADE (RULE 26) has an outer diameter D22.
[0045] The circular recess section 23 is cylindrical and extends coaxially to the longitudinal axis L19 with a diameter D23. The outer diameter D22 of the circular ring recess sections 22, 22', 22" is larger than the outer diameter D23 of the circular recess section 23.
[0046] The circular recess sections 22, 22', 22" are each delimited on both sides in a circumferential direction around the longitudinal axis L19 by holding sections 24, 24', 24". The holding sections 24, 24', 24' extend from radially outside to radially inside up to the diameter D23. The holding sections 24, 24', 24" are arranged in a direction parallel to the longitudinal axis L19 in overlap with the ambient chamber 33.
[0047] The housing partition wall section 25 comprises a recess 26 formed by three circular ring recess sections 27, 27', 27", as can be seen particularly in Figure 7. The circular ring recess sections 27, 27', 27" are arranged rotationally symmetrically with respect to the longitudinal axis L19 at equal distances from one another. The circular ring recess sections 27, 27', 27" are each formed as a circular ring segment around the longitudinal axis L19, which extends in a direction parallel to the longitudinal axis L19. The circular ring recess sections 27, 27', 27" each form a circular segment-shaped section of the recess 26, which has an outer diameter D27 and an inner diameter D28.
[0048] The annular recess sections 27, 27', 27" in the housing partition wall section 25 are arranged in a direction parallel to the longitudinal axis L19 in complete overlap with the recess 21 in the housing outer wall section 20. In other words, a projection of the annular recess sections 27, 27', 27" in the housing partition wall section 25 in the direction of the recess 21 and parallel to the longitudinal axis L19 is completely imaged on the recess 21. In particular, one of the annular recess sections 27, 27', 27" in the housing partition wall section 25 is arranged in a direction parallel to the longitudinal axis L19 in complete overlap.
[0049] REPLACEMENT LEAF (RULE 26) Cover to one of the circular recess sections 22, 22', 22" in the housing outer wall section 20. The outer diameter D27 is also equal to the second diameter D22.
[0050] The annular recess sections 27, 27', 27" in the housing partition wall section 2 and the annular recess sections 22, 22', 22" in the housing outer wall section 20 can be manufactured by a common milling process. In other words, the recess 26 of the housing partition wall section 25 can be produced simultaneously with the machining of the recess 21 of the housing outer wall section 20.
[0051] Due to the rotationally symmetrical arrangement of the circular ring recess sections 27, 27', 27" with respect to the longitudinal axis L19, the housing partition wall section 25 comprises a central tripod section 28, which is formed from a cylinder section arranged coaxially to the longitudinal axis L19 and three connecting sections projecting therefrom.
[0052] The housing inner wall section 29 comprises a recess 30 formed by a circular recess section 31. The housing inner wall section 29 is arranged axially with respect to the longitudinal axis L19 so as not to overlap the recess 26 in the housing partition wall section 25. The circular recess section 31 is designed as a straight cylinder that extends coaxially to the longitudinal axis L19 with a diameter D31 through the housing inner wall section 29.
[0053] The diameter D31 is smaller than the inner diameter D28 of the recess 26 or the circular ring recess sections 27, 27', 27". Thus, a circular ring-shaped cover section 32 is formed by the housing inner wall section. The circular ring recess sections 27, 27', 27" are arranged in the axial direction with respect to the longitudinal axis L19 completely overlapping with the cover section 32. The cover section 32 thus enables a straight penetration from an external
[0054] REPLACEMENT SHEET (RULE 26) side of the housing 1 into the interior of the housing 1 via the circular ring recess sections 27, 27', 27".
[0055] The vent opening 19 thus comprises the recess 21 of the housing outer wall section 20, the recess 26 of the housing partition wall section 25, the recess 30 of the housing inner wall section 29, the inner chamber 34 and the outer chamber 33.
[0056] REPLACEMENT SHEET (RULE 26) List of reference symbols
[0057] 1 housing
[0058] 2 intermediate unit
[0059] 3 Intermediate element
[0060] 4 cover element
[0061] 5 Lid element
[0062] 6 Final Unit
[0063] 7 End element
[0064] 8 Lid element
[0065] 9 Cover element
[0066] 10 Recording unit
[0067] 11 Receiving element
[0068] 12 cover element
[0069] 13 Cover element
[0070] 14 Housing wall
[0071] 15 Coolant connection
[0072] 16 Interface
[0073] 17 Interface
[0074] 18 Ventilation
[0075] 19 Ventilation breakthrough
[0076] 20 Housing outer wall section
[0077] 21 Recess
[0078] 22 Circular ring recess section
[0079] 23 central circular recess section
[0080] 24 stopping section
[0081] 25 Housing partition section
[0082] 26 Recess Circular recess section Central tripod section Housing inner wall section Recess Central circular recess section Cover section Ambient chamber Inner chamber Venting element Clamping section
Claims
A N S P R Ü C H E 1 . Housing, in particular for an energy storage device, comprising: a housing wall (14') which comprises a housing outer wall section (20), a housing partition wall section (25) and a housing inner wall section (29), wherein a venting opening (19) for venting the housing (1) extends through the housing outer wall section (20), the housing partition wall section (25) and the housing inner wall section (29) along a longitudinal axis (L19), and wherein the housing outer wall section (20) and the housing inner wall section (29) are spaced apart from one another in the axial direction and the housing partition wall section (25) is arranged axially between the housing outer wall section (20) and the housing inner wall section (29), and wherein the venting opening (19) is at least partially enclosed by a recess (26) in the housing partition wall section (25), which recess is arranged in the axial direction in complete overlap with the housing inner wall section (29),and a recess (21) in the housing outer wall section (20), characterized in that the recess (26) in the housing partition wall section (25) is arranged completely in axial overlap with the recess (21) in the housing outer wall section (20).
2. Housing according to claim 1, characterized in that the housing inner wall section (29) has a recess (30) which is arranged in the axial direction without overlapping the recess (26) in the housing partition wall section (25).
3. Housing according to one of claims 1 or 2, characterized in that the recess (26) of the housing partition wall section (25) comprises a plurality of recess sections which are arranged rotationally symmetrically about the longitudinal axis (L19), wherein each of the plurality of recess sections is arranged in the axial direction in complete overlap with the housing inner wall section (29) and with the recess (21) in the housing outer wall section (20).
4. Housing according to one of claims 1 to 3, characterized in that the recess (26) or the plurality of recess sections in the housing partition wall section (25) comprise a circular ring recess section (27, 27', 27") which is arranged in the form of a circular ring segment around the longitudinal axis (L19) and is delimited by a first outer diameter (D27) and a first inner diameter (D28).
5. Housing according to one of claims 1 to 4, characterized in that the recess (21) in the housing outer wall section (20) comprises one or more circular ring recess sections (22, 22', 22"), which are arranged in the form of a circular ring segment around the longitudinal axis (L19).
6. Housing according to claim 5, characterized in that the one or more circular ring recess sections (22, 22', 22") define a circular segment-shaped section of the outer contour of the recess (21) in the housing outer wall section (20) with a second outer diameter (D22).
7. Housing according to one of claims 1 to 6, characterized in that the recess (21) in the housing outer wall section (20) is designed such that one or more holding sections (24, 24', 24") of the housing outer wall section (20) extend from radially outside to radially inside.
8. Housing according to claim?, characterized in that the one or more holding sections (24, 24', 24") have a circular segment-shaped section of an outer contour of the recess (21) in the housing outer wall section (20) with a third outer diameter (D23).
9. Housing according to claim 8, characterized in that the second outer diameter (D22) is larger than the third outer diameter (D23), and / or that the first outer diameter (D27) is equal to the second outer diameter (D22).
10. Housing according to one of claims 5 to 9, characterized in that a circular ring recess section (22) of the recess (21) in the housing outer wall section (20) is delimited in the circumferential direction on a first side by a first holding section (24) and on the opposite second side by a second holding section (24'). 11 . Housing according to one of claims 1 to 10, characterized in that an ambient chamber (33) is formed between the housing outer wall section (20) and the housing partition wall section (25) and that an inner chamber (34) is formed between the housing partition wall section (25) and the housing inner wall section (29).
12. Housing according to claim 11, characterized in that the ambient chamber (33) is delimited by a first envelope arranged cylindrically around the longitudinal axis (L19) and having a fourth outer diameter (D33), and in that the inner chamber (34) is delimited by a second envelope arranged cylindrically around the longitudinal axis (L19) and having a fifth outer diameter (D34).
13. Housing according to claim 12, characterized in that the fourth outer diameter (D33) is larger than the first outer diameter (D27), the second outer diameter (D22) and / or the third outer diameter (D23), and / or that the fifth outer diameter (D34) is equal to the first outer diameter (D27) and / or the second outer diameter (D22).
14. Housing according to one of claims 1 to 13, characterized in that a venting element (35) is inserted into the venting opening (19), wherein the venting element (35) comprises one or more clamping sections (36) which are clamped to the housing outer wall section (20).
15. Housing according to claim 14, characterized in that the one or more clamping sections (36) are arranged at least in sections in the ambient chamber (33) and the one or more Retaining sections (24, 24', 24") of the housing outer wall section (20) engage behind.