System of three devices including a device for draining a coolant oil

Abstract

System comprising three devices (101, 102, 201), wherein the third device (201) is provided for fluid-tightly closing a membrane (106) of the first device (101), which is provided for draining an electrically weakly or non-conductive coolant oil from a housing (104) of a high-voltage battery (105) for a vehicle, which is directly cooled by the fluid, wherein the first device (101) comprises the mechanically destructible membrane (106), which - is arranged on a wall of the housing (104), or - comprises a section of the housing (104) with a wall thickness which is reduced compared to a wall thickness which the housing (104) has in a region of the housing (104) surrounding the section, wherein the membrane (106) cannot be opened without being destroyed, wherein the membrane (106) is arranged on the housing (104) in such a way that the coolant oil (103) escapes from the housing (104) when the membrane (106) is mechanically destroyed, wherein the second device (102) is designed as a discharge means (109) for destructively opening the membrane (106) of the first device (101), wherein the third device (201) for fluid-tightly closing the membrane (106) has a cover (202) which is designed to cover at least a destroyed part of the membrane (106) in a fluid-tight manner, wherein the third device (201) for fluid-tightly closing the membrane (106) has fastening means (203) which are designed to fasten the cover (202) to the housing (104) in a fluid-tight manner.

Description

[0001] The invention relates to a system comprising three devices, including a device for draining coolant oil. Furthermore, the invention relates to a method.

[0002] From DE 102013014903 A1 it is known that a predetermined breaking point is provided on a battery housing for draining coolant that has escaped from the closed cooling circuit.

[0003] DE 10 2021 116 769 A1 relates to a fluid drainage arrangement, a battery arrangement and a vehicle.

[0004] DE 10 2019 206 106 A1 relates to a drainage device and a housing arrangement for an electrical component of a motor vehicle.

[0005] US 2022 / 0013853 A1 discloses a battery. This battery comprises a battery cell with a pressure relief mechanism arranged in a first wall of a battery cell. When an internal pressure or temperature of the battery cell reaches a threshold value, the pressure relief mechanism is actuated to release the internal pressure.

[0006] DE 10 2012 020 299 A1 discloses a motor vehicle with a battery. A housing comprises a receiving space in which an electrolyte of the battery is accommodated. An opening element is provided. Furthermore, a sorption element is provided for sorbing the electrolyte flowing out of the housing through an outlet opening.

[0007] The system and method according to the independent claims provide a means of discharge with little effort.

[0008] The system comprising three devices provides that the third device is provided for fluid-tightly closing a membrane of the first device, which is provided for draining an electrically weakly or non-conductive coolant oil from a housing of a high-voltage battery for a vehicle that is directly cooled by the coolant oil, wherein the first device comprises a mechanically destructible membrane that - is arranged on a wall of the housing, or - comprises a section of the housing with a wall thickness that is reduced compared to a wall thickness that the housing has in an area of ​​the housing surrounding the section, wherein the membrane cannot be opened without being destroyed, wherein the membrane is arranged on the housing in such a way that the coolant oil escapes from the housing when the membrane is mechanically destroyed, wherein the second device is designed as a discharge means for destructively opening the membrane of the first device, wherein the third device for closing the membrane in a coolant-oil-tight manner has a cover which is designed to cover at least a destroyed part of the membrane in a fluid-tight manner, wherein the third device for closing the membrane in a fluid-tight manner has fastening means which are designed to fasten the cover to the housing in a fluid-tight manner.

[0009] Preferably, the system is provided with the first device on the membrane comprising a connection for a draining means. This allows the fluid in the system comprising the draining means to be drained.

[0010] The connection preferably includes a sealing element for a fluid-tight connection to the draining means. This allows the fluid to be drained in a system that is as closed as possible.

[0011] Preferably, the membrane is arranged and configured such that, after opening, the membrane acts as a sealing element for a fluid-tight connection with the discharge means. This prevents contamination of the discharged fluid.

[0012] Preferably, the connector includes a removable cover. This protects the connector from contamination.

[0013] The membrane is preferably mechanically destructible without creating detached parts. This prevents contamination of the discharged fluid by parts of the membrane.

[0014] The system for draining the fluid provides that the first device comprises a draining means for destructively opening the membrane.

[0015] It can be provided that the discharge means comprises a lance which is designed to pierce the membrane or that the discharge means comprises a mandrel which is designed to pierce the membrane.

[0016] Preferably, the system for draining the fluid comprises a channel for draining the fluid and / or a vessel for receiving the fluid. This can prevent contamination of the drained fluid or allow the fluid to be reused.

[0017] In a further embodiment, the system for draining the fluid is arranged such that the fluid can be removed by means of a suction lance.

[0018] The third device for fluid-tightly closing the membrane comprises a cover configured to fluid-tightly cover at least a damaged portion of the membrane. The third device for fluid-tightly closing the membrane comprises fastening means, in particular blind rivet nuts, screw plugs, fusible plugs, screw caps, and / or plastic plugs, configured to fluid-tightly fasten the cover to the housing. This represents a repair kit with which the housing can be closed after draining.

[0019] The method for draining the fluid provides for attaching the second devices for draining the fluid to one another.

[0020] Preferably, the method provides for opening the detachable cover before attaching the second devices to one another.

[0021] Preferably, the method provides for attaching the cover.

[0022] Further advantageous embodiments can be found in the following description and the drawing. The drawing shows: Fig. 1 a schematic representation of a system for draining a fluid, Fig. 2 a schematic representation of a third device for fluid-tight sealing of a membrane, Fig. 3 steps in a coolant oil draining procedure.

[0023] In Fig. 1 schematically illustrates a first device 101 and a second device 102 for draining a coolant oil 103 from a housing 104 of a battery 105 directly cooled by the coolant oil 103. Directly cooled means that the coolant oil 103 is in contact with live parts of the battery 105 without a closed cooling channel separating the coolant oil 103 from the battery 105.

[0024] The first device 101 is designed to drain the coolant oil 103.

[0025] The coolant oil 103 is electrically weak or non-conductive. The coolant oil 103 is, for example, a coolant, preferably oil.

[0026] The battery 105 is, for example, a high-voltage battery for a vehicle.

[0027] The first device 101 comprises a mechanically destructible membrane 106.

[0028] The membrane 106 is arranged on a wall of the housing 104.

[0029] The membrane 106 may also include a portion of the housing 104 with a reduced wall thickness. This means that the portion has a wall thickness that is reduced compared to a wall thickness that the housing 104 has in a region of the housing 104 surrounding the portion.

[0030] The diaphragm 106 cannot be opened without causing damage. In this example, the diaphragm 106 is designed in such a way that it cannot be destroyed by the coolant oil 103 located inside the housing 104.

[0031] The membrane 106 is optionally mechanically destructible without producing parts that are detached from the membrane 106.

[0032] The diaphragm 106 is arranged on the housing 104 in such a way that the coolant oil 103 escapes from the housing 104 if the diaphragm 106 is mechanically damaged. In the example, the diaphragm 106 is arranged on an underside of the housing 104. If the diaphragm 106 is mechanically damaged, the coolant oil 103 escapes from the housing 104 due to gravity.

[0033] The first device 101 optionally comprises a connection 107 for a drain means on the membrane 106.

[0034] The connection 107 optionally includes a sealing element for fluid-tight connection with the drain means.

[0035] The membrane 106 is, for example, arranged and designed such that the membrane 106 acts as a sealing element for fluid-tight connection with the discharge means after opening the membrane 106.

[0036] The connection 107 optionally includes a cover 108 that can be removed from the connection 107. The connection 107 optionally includes a screw thread. The cover 108 includes, for example, a screw cap that can be screwed onto the screw thread.

[0037] The second device 102 comprises the release means for destructively opening the membrane 106.

[0038] In the example, the discharge means comprises a lance 109 designed to pierce the membrane 106. Instead of the lance 109, the discharge means may comprise a mandrel designed to pierce the membrane 106.

[0039] The second device 102 optionally comprises a channel 110 for draining the coolant oil 103. The second device 102 optionally comprises a vessel 111 for receiving the coolant oil 103.

[0040] In Fig. 2, a third device 201 for fluid-tight sealing of the membrane 106 is schematically shown.

[0041] The third device 201 for fluid-tightly closing the membrane 106 has a cover 202 which is designed to cover at least a destroyed part of the membrane 106 in a fluid-tight manner.

[0042] The third device 201 for fluid-tightly closing the membrane 106 has fastening means 203 which are designed to fasten the cover 202 to the housing 104 in a fluid-tight manner.

[0043] The fastening means 203 include, for example, blind rivet nuts, screw plugs, fusible plugs, screw caps and / or plastic plugs.

[0044] In Fig.3 shows steps of a method for draining the coolant oil 103 from the housing 104.

[0045] The method optionally provides a step 301.

[0046] In step 301, the detachable cover 108 is opened before attaching the second device.

[0047] For example, step 301 is executed when the cover 108 is present or closed.

[0048] The method includes a step 302.

[0049] Step 302 includes attaching the second device 102 to the first device 101. Attaching the second device 102 causes a destructive opening of the membrane 106. For example, the membrane 106 is pierced with the lance 109.

[0050] The coolant oil 103 exits through the membrane 106, e.g., due to gravity. The coolant oil 103 may be drained through the channel 110. The coolant oil 103 is drained, e.g., into the vessel 111.

[0051] The method optionally provides a step 303.

[0052] Step 303 includes attaching the cover 202 to the first device 101.

[0053] The cover 202 is fastened to the housing 104, for example, with the fastening means 203 in such a way that the cover 202 seals the membrane 106 in a fluid-tight manner.

Claims

[1] System comprising three devices (101, 102, 201), wherein the third device (201) is provided for fluid-tightly closing a membrane (106) of the first device (101), which is provided for draining an electrically weakly or non-conductive coolant oil from a housing (104) of a high-voltage battery (105) for a vehicle, which is directly cooled by the fluid, wherein the first device (101) comprises the mechanically destructible membrane (106), which - is arranged on a wall of the housing (104), or - comprises a section of the housing (104) with a wall thickness which is reduced compared to a wall thickness which the housing (104) has in a region of the housing (104) surrounding the section, wherein the membrane (106) cannot be opened without being destroyed, wherein the membrane (106) is arranged on the housing (104) in such a way that the coolant oil (103) escapes from the housing (104) when the membrane (106) is mechanically destroyed, wherein the second device (102) is designed as a discharge means (109) for destructively opening the membrane (106) of the first device (101), wherein the third device (201) for fluid-tightly closing the membrane (106) has a cover (202) which is designed to cover at least a destroyed part of the membrane (106) in a fluid-tight manner, wherein the third device (201) for fluid-tightly closing the membrane (106) has fastening means (203) which are designed to fasten the cover (202) to the housing (104) in a fluid-tight manner. [2] System according to claim 1, characterized by that the first device (101) on the membrane (106) comprises a connection (107) for a discharge means (109). [3] System according to claim 2, characterized by that the connection (107) comprises a sealing element for fluid-tight connection to the discharge means (109). [4] System according to claim 2, characterized bythat the membrane (106) is arranged and designed such that the membrane (106) acts as a sealing element for a fluid-tight connection with the discharge means (109) after opening. [5] System according to one of claims 2 to 4, characterized by that the connection (107) comprises a cover (108) which can be detached from the connection (107). [6] System according to one of the preceding claims, characterized by that the membrane (106) is mechanically destructible without producing parts that are detached from the membrane (106). [7] System according to one of claims 1 to 6, characterized by that the discharge means (109) comprises a lance which is designed to pierce the membrane (106) or that the discharge means comprises a mandrel which is designed to pierce the membrane (106). [8] System (102) according to claim 7, characterized bythat the second device (102) comprises a channel (110) for draining the coolant oil (103) and / or a vessel (111) for receiving the coolant oil (103). [9] System according to one of claims 1 to 6, characterized by that the fastening means (203) comprises blind rivet nuts, screw plugs, fusible plugs, screw caps and / or plastic plugs. [10] A method for draining a coolant oil with a system according to any one of the preceding claims, characterized by that the method provides for attaching (302) the second device (102) to the first device (101). [11] Method according to a combination of claims 5 and 10, characterized by that the method provides for opening (301) the detachable cover (108) before attaching the third device (201) to the first device (101). [12] Method according to one of claims 10 or 11, characterized bythat the method provides for attaching (303) the cover (202).

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