Electronics box with at least one immersion-temperature controlled enclosure, and battery storage with electronics box

Abstract

The disclosure relates to an electronics box (1) with at least one immersion-temperature-controlled housing (4; 6) which has at least one fluid inlet (10) and at least one fluid outlet (12), so that a dielectric fluid can flow into the housing (4; 6) via the fluid inlet (10) in order to flow around at least one electronic component (8) contained in the housing (4; 6), wherein a free volume (18) not wetted / through which and / or around which the dielectric fluid flows is formed in the housing (4; 6), so that gas separated from the dielectric fluid collects in the free volume (18), as well as a battery storage device (2) with a plurality of battery cells (28) contained in a battery storage housing (26) and an electronics box (1) according to the disclosure arranged on the battery storage housing (26).

Description

[0001] The disclosure relates to an electronics box with at least one immersion-temperature-controlled housing, which has at least one fluid inlet and at least one fluid outlet, such that a dielectric fluid can flow into the housing via the fluid inlet in order to flow around (and cool) at least one electronic component contained in the housing. Background of the Revelation

[0002] A battery storage system, or high-voltage storage system, in a hybrid or electric vehicle is an energy storage system that stores electrical energy in the form of direct current at high voltage. This stored energy is typically used to power at least one of the vehicle's electric motors. These high-voltage storage systems are typically composed of individual battery cells, such as lithium-ion cells, or modules configured in a battery pack. An electronic control unit (or "penthouse") is usually provided for the management and regulation of the battery storage system, housing a variety of electronic components.

[0003] To ensure safe operation and minimize the risk of damage to the electronic components, the electronic enclosure and components must be cooled. Active cooling systems are typically used for this purpose. These systems employ one or more cooling plates that are in thermal contact with the electronic components and are operated with a single-phase coolant, such as a water-glycol mixture, or with a two-phase coolant.

[0004] Alternatively, it is also known from the prior art that electronic components, especially within control units, can be cooled directly by means of a (highly) dielectric fluid, which is primarily single-phase and flows directly around the walls of the electronic components or heat sinks attached to them.For example, the applicant's unpublished application DE 10 2024 118 149 shows an electronic component for a motor vehicle, comprising a housing enclosing a receiving space, at least one electrical or electronic component which is received in the receiving space, a heat-conducting element which is arranged on a surface of the component to be cooled and is designed to conduct heat away from the component, and a coolant guide device which is configured to guide a dielectric coolant to the heat-conducting element, whereby the heat-conducting element can be approached and surrounded by the coolant, whereby heat can be transferred from the heat-conducting element to the coolant.

[0005] However, the current state of the art has the inherent disadvantage that the thermal connection between the electronic components being cooled and the coolant is systematically limited due to the relatively high thermal resistance in the area of ​​heat transfer to a cooling plate. Therefore, an increased temperature difference between the electronic component and the coolant is required for cooling. Given a predetermined temperature limit for the electronic component, this necessitates a coolant at a low temperature level (e.g., 65°C), which a vehicle's cooling system cannot provide in all relevant operating conditions. Consequently, it can happen that the electronic components are only marginally or partially insufficiently cooled in certain operating situations.

[0006] At the same time, due to the aforementioned increased required temperature difference, there is a possibility that an electronic component may be operated at an elevated, sometimes borderline temperature level for a given coolant operating temperature range, which contributes to premature degradation of the component properties and / or a significantly increased failure rate.

[0007] A further disadvantage is that the thermal connection to a known, prior art coolant cooling plate is bulky and heavy, since the cooling plate is a large component designed to be sufficiently large for the hydraulic flow of coolant and is also equipped with the supply and return lines for the coolant. Thus, the overall height of an electronics box is significantly increased solely due to the integrated cooling plate.

[0008] Furthermore, the requirements for coolant flow rates are considerable (e.g., >1300 l / h). This leads, on the one hand, to large diameters for the associated coolant lines and, on the other hand, places a strain on the vehicle's coolant circuit due to the typically high pressure losses when the coolant flows through the cooling plate. In particular, this can increase the electrical power consumption of a coolant pump in the coolant circuit, thus increasing the vehicle's electrical system load and impacting its range.

[0009] Since the cooling plate is permeated with coolant, a leak that causes coolant to escape jeopardizes the electrical operational safety of the electronics box. Furthermore, the cooling plate, as known from the prior art, is not individually replaceable or serviceable, especially when assembled with a high-voltage battery and after this assembly has been installed in a vehicle. Instead, replacement requires the complex removal and partial disassembly of the entire high-voltage battery assembly. Summary of Revelation

[0010] The tasks and objectives of the disclosure are to eliminate or at least reduce the disadvantages of the prior art and, in particular, to provide an electronics box that is as light as possible, optimized for installation space and easily replaceable, and which ensures sufficient cooling of the electronic component housed within.

[0011] The tasks and objectives with regard to a generic electronics box are solved, as disclosed, by the subject matter of claim 1. The disclosure is thus based on the knowledge of directly (single-phase) circulating a dielectric fluid / cooling fluid / coolant around the electronic components in an electronics box and thereby cooling / tempering them, thus eliminating the need for a cooling plate.

[0012] The electronics box is accordingly configured / adapted as disclosed in which a free volume is formed in the housing that is not wetted / through which and / or around which the dielectric fluid flows, so that gas separated from the dielectric fluid collects in the free volume.

[0013] Designing at least one housing of the electronics box as an immersion-temperature-controlled enclosure ensures sufficient and demand-based temperature control of the at least one electronic component. Furthermore, a separate cooling plate is unnecessary, which in turn reduces the overall height of the electronics box. The provision of free volume allows for the necessary gas venting to ensure operational safety.

[0014] Advantageous embodiments are claimed in the dependent claims and are explained below.

[0015] In a preferred embodiment, the electronics box can further comprise at least one fluid supply channel formed in the housing, which directs the dielectric fluid flowing in via the fluid inlet to the at least one electronic component. It may be advantageous if the at least one fluid supply channel is configured for free jet cooling of the at least one electronic component. Alternatively, it may also be advantageous if the at least one fluid supply channel is configured for jet / immersion cooling or immersion cooling of the at least one electronic component. Preferably, the at least one fluid supply channel can also have a nozzle section or gap section, so that the dielectric fluid acts as a spray cooling system on the at least one electronic component.In an alternative, advantageous embodiment, the at least one fluid supply channel can be designed in the manner of free convection. This means that the cooling of the electronic component can be purely passive, via thermal contact with the virtually stationary or non-actively flowing dielectric fluid.

[0016] According to an advantageous embodiment, the electronics box can further comprise at least one fluid drainage channel formed in the housing, which directs the dielectric fluid flowing around the at least one electronic component to the at least one fluid outlet. In particular, it can be advantageous if the fluid supply channel allows for local evaporative cooling of the dielectric fluid and if re-condensation of the evaporated fluid occurs in the fluid drainage channel, for example, by arranging a condensation grid.

[0017] Thus, the (immersion) temperature control can be adapted to the specific heat dissipation or cooling requirements of the at least one electronic component, in particular its upper temperature limit and locally varying heat flux densities, allowing its use for a wide range of electronic components. In other words, the type of immersion temperature control for the at least one electronic component can be adapted to the local heat flux densities required for cooling its surfaces. Consequently, the required cooling capacity can be ensured with a minimum of fluid volume and pressure drop or pump power requirement.

[0018] Preferably, the at least one fluid supply channel can open into the free volume. Alternatively or additionally, the at least one fluid discharge channel can also be fluidically connected to the free volume. In particular, it can be advantageous if a drain opening of the fluid discharge channel, through which the dielectric fluid can flow out of the at least one housing, is arranged in a geodesically located, i.e., in the direction of gravity, lower region of the at least one housing. Alternatively, however, it is also conceivable that the drain opening is arranged in a geodesically located upper region of the at least one housing. In other words, the at least one fluid supply channel and the at least one fluid discharge channel can be arranged on the housing such that a gas separation volume is formed in a region of the housing that is upper in the direction of gravity.In other words, the free volume can be geodesically located at the top of the housing, whereby the at least one fluid supply channel and the at least one fluid discharge channel can be arranged arbitrarily or can be fluidically connected to the free volume.

[0019] According to a particularly preferred embodiment, the electronics box according to the disclosure can have at least one volumetric molded part arranged in the housing, which forms the at least one fluid supply channel and / or the at least one fluid discharge channel. Preferably, the at least one volumetric molded part can be made of a foam, in particular a rigid foam. Particularly preferably, the volumetric molded part can only partially fill the at least one housing in order to form the free volume. That is, the at least one volumetric molded part can only fill a partial area of ​​the at least one housing, so that the free volume can form in an unfilled partial area. In other words, the at least one volumetric molded part can form one or more (parallel or series) flow channel sections, namely the at least one fluid supply channel and the at least one fluid discharge channel.These flow channel sections can preferably be adapted to the type of fluid flow around the at least one electronic component. In particular, the cross-sections of the flow channel sections, determined by the at least one volumetric molding, can be adjusted to optimize local flow velocities as the fluid flows around the at least one electronic component. Simultaneously, the fluid volume required for immersion temperature control in the at least one housing can be minimized, since a portion of the area is filled by the at least one volumetric molding. In other words, an internal volume of the at least one housing not required for immersion temperature control is filled by the volumetric molding, resulting in a reduction in mass and a cost advantage.Furthermore, pressure losses can be limited, which in turn allows for a minimization of the electrical load requirement of a fluid pump.

[0020] In an advantageous embodiment according to the disclosure, the at least one immersion-temperature-controlled enclosure can be configured as at least one inner enclosure arranged within an outer enclosure. In other words, at least one immersion-temperature-controlled inner enclosure can be implemented within an outer enclosure of an electronics box according to the disclosure. Put another way, within an electronics box, individual enclosures can be operated under immersion temperature control (wet) and other enclosures under non-immersion temperature control (dry). Thus, in an exemplary electronics box according to the disclosure, a dry outer enclosure can be combined with at least one wet inner enclosure. Furthermore, the outer enclosure can also advantageously be configured as an immersion-temperature-controlled enclosure.

[0021] Furthermore, it can be particularly advantageous if at least one inner housing and the outer housing share (partially) a common housing wall. For example, a base plate of the inner housing can be identical to a section of a base plate of the outer housing. This reduces the mass of the electronics box.

[0022] According to a preferred embodiment, at least two immersion-temperature-controlled inner housings can be provided, which are connected via at least one fluid line (fluid-conducting connection). That is, the at least one fluid line can be provided between two immersion-temperature-controlled inner housings, each of which has a free volume acting as a gas collector. In particular, at least one fluid line can be located in a geodesically upper region and / or at least one fluid line in the geodesically lower region of the free volumes. The at least one fluid line can therefore be designed, for example, in the form of a pipe fitting. By means of the at least one fluid line, the respective free volumes can be functionally connected to form a single hydraulically corresponding total equalization volume.Particularly in the case of adjacent / next to adjacent inner housings, their free (compensating) volumes can thus have an additive effect.

[0023] An advantageous embodiment of an electronics box according to the disclosure can have a filling opening, preferably closable with a cover, for filling the electronics box with the dielectric fluid, wherein the filling opening opens into or leads into the free volume. In particular, the filling opening can be designed for filling the at least one housing, and optionally parts of a fluid circuit connected to and attached to the housing, with fluid. It may be advantageous if the cover has a repeatedly mountable / removable (screw or bayonet) connection with the filling opening of the at least one housing. Furthermore, it may be advantageous if the cover is equipped with a pressure relief valve for venting / releasing gas (air) from the housing into the environment.Alternatively or additionally, the cap can preferably be equipped with a vacuum relief valve (breather) to allow ambient air to flow into the housing. This allows the fluid circuit to be (initially) filled, and the free (equalizing) volume can be used as an inlet / outlet point for gas to and from the environment (analogous to the design of a conventional expansion tank in a water / glycol circuit). Refilling with dielectric fluid via the filling port is also easily accomplished, thus improving serviceability.

[0024] Furthermore, it may be advantageous to integrate sensors within an electronics box as disclosed, which serve to regulate / control the fluid circuit, e.g., to actuate valve flaps or feed pumps. Such sensors can be designed, in particular, as temperature sensors, level sensors, and / or water sensors.

[0025] The present disclosure further relates to a battery storage device comprising a plurality of battery cells contained in a battery storage housing and an electronics box arranged on the battery storage housing according to the disclosure.

[0026] In an advantageous embodiment, the battery storage housing can be an immersion-temperature-controlled housing and have at least one through-opening for fluidic connection between the battery storage housing and the at least one housing of the electronics box, thus enabling the exchange of the dielectric fluid between the battery storage housing and the at least one housing. This means that the immersion-temperature-controlled battery storage housing and the at least one immersion-temperature-controlled housing of the electronics box can be hydraulically connected to form a single fluid circuit. This makes it possible, in particular, to use the free volume of the at least one immersion-temperature-controlled housing as a buffer volume for the entire fluid circuit. Consequently, a separate buffer tank can be omitted. In other words, individual housings can be hydraulically connected to one another.For this purpose, openings / passages / gaps can be provided in housing walls, pipe connections, or lines, allowing for the exchange of dielectric fluid and / or gas via these connections. Furthermore, it can be advantageous to integrate fixed and / or switchable throttles, flaps, or valves into these connections. Using the (switchable) throttles or valve flaps, the flow rates in individual sections of the overall fluid circuit can be adapted to operating conditions with varying heat dissipation, thus reducing the electrical load required to operate a fluid pump. This ensures that a minimum flow rate ("degassing leakage") is always maintained in the electronics box to guarantee the continued functionality of the expansion volume within the electronics box.

[0027] To reduce the weight of the battery storage system according to the disclosure, it may also be advantageous if at least one immersion-temperature-controlled housing has a partial common housing wall with another, preferably immersion-temperature-controlled, component, such as the battery storage housing.

[0028] In a particularly preferred embodiment, pressurized areas (overpressure area) within the immersion-temperature-controlled battery storage housing can be connected to the at least one fluid inlet line of the at least one housing and / or the at least one fluid outlet line in the at least one housing can be connected to a suction area (underpressure area) in the battery storage housing. In other words, the fluid flow in the at least one housing and the fluid flows in the battery storage housing form parallel fluid flows within the common overall fluid circuit. Consequently, a common pump, e.g., within the battery storage housing, can be used for this overall fluid circuit, which reduces the number of components and the complexity of controlling them.

[0029] In the aforementioned overall fluid circuit, the freely configurable flow geometry, achieved through arbitrary design and shaping of the electronics box's volumetric component, allows for the creation of a pressure drop (characteristic curve) suitable for the flow through a volumetric component of the battery storage housing. This enables the necessary parallel volume flows to be precisely established in the battery storage housing and the electronics box according to the flow divider principle. Furthermore, an additional fluid transfer pump can be easily integrated into the connections as needed. Additionally, this method allows for the connection of degassing points (geodetic high points) in the housings, where gas can accumulate, to the free volume (expansion volume) designed as a gas collector., so that within a total fluid circuit the necessary degassing of all housings or flow areas through which fluid flows is enabled into the expansion volume in an electronics box. Brief description of the characters

[0030] The disclosure is explained in more detail below with reference to preferred embodiments and the figures. These show: Fig. 1 a schematic view of an electronics box according to a first embodiment as disclosed; Fig. 2 a schematic view of the electronics box according to a second embodiment as disclosed; Fig. 3 a schematic view of the electronics box according to a third embodiment as disclosed; and Fig. 4 a schematic view of a battery storage device with an electronics box as disclosed according to a fourth embodiment.

[0031] The figures are schematic and serve only to illustrate the revelation. Identical elements are marked with the same reference symbols. The features of the different versions are interchangeable. Detailed description of preferred embodiments

[0032] Fig. Figure 1 shows a schematic view of an electronics box 1 according to a first embodiment as disclosed. As described in more detail below, the electronics box 1 is designed for controlling and regulating a battery storage device 2 and is arranged on it. For this purpose, the electronics box 1 according to the first embodiment has a (dry / non-immersion temperature-controlled) outer housing 4 and at least one, in particular two, inner housings 6. The inner housings 6 are, as shown in Fig. 1 shown, arranged in the outer housing 4.

[0033] Each of the inner housings 6 contains at least one electronic component 8. According to the first embodiment, each inner housing 6 further comprises a fluid supply channel 10 and a fluid discharge channel 12. A cooling medium, in particular a dielectric fluid, is guided via the fluid supply channel 10 from an outer surface of the electronic box 1 to the electronic component 8 in order to flow around it and thereby cool it. The fluid discharge channel 12, on the other hand, is designed to guide the dielectric fluid away from the electronic component 8 and out of the electronic box 1. The inner housings 6 are therefore designed as immersion-cooled / wet housings.

[0034] As in Fig. As shown in Figure 1, a volumetric molded part 14 made of rigid foam is arranged in each of the inner housings 6, forming sections of the fluid supply channel 10 and / or the fluid discharge channel 12 in the respective inner housing 6. In other words, the fluid supply channel 10 and / or the fluid discharge channel 12 are at least partially formed in or by the volumetric molded part 14, so that the dielectric fluid can flow through the volumetric molded part 14 to and away from the electronic component 8.

[0035] The volume molded part 14 is furthermore, as in Fig. 1, as can be seen, is designed such that it only fills a portion of the inner housing 6. In other words, the volume molding 14 is designed such that a free volume 18 is formed between the volume molding 14 and an inner surface 16 of the inner housing 6. The free volume 18 serves to collect gas separated from the dielectric fluid and thus functions as an expansion volume or in the manner of a buffer tank / expansion vessel. According to the disclosure, the free volume 18 is oriented geodesically / in the direction of gravity G (top-bottom direction in Fig. 1) upper area of ​​the inner housing 6 so that the separated gas can collect in this area and, if necessary, be discharged from the inner housing 6.

[0036] Fig. Figure 2 shows a schematic view of the electronics box 1 according to a second embodiment. The following description of the electronics box 1 according to the second embodiment will focus solely on the differences compared to the electronics box 1 described above according to the first embodiment.

[0037] As in Fig. As shown in Figure 2, the electronics box 1 according to the second embodiment has a dry outer housing 4 in which two inner housings 6A and 6B are arranged. In one of the inner housings 6A, the volumetric molded part 14 is received to form the fluid supply channel 10 and the fluid discharge channel 12, whereas the other inner housing 6B does not have a volumetric molded part 14. The inner housing 6B is thus flooded with the dielectric fluid to cool the electronic component 8 contained therein. According to the disclosure, however, the inner housing 6B is only partially flooded with the dielectric fluid, so that the free volume 18 is formed in the geodesically upper part of the inner housing 6B.

[0038] As in Fig. As can be seen in Figure 2, the inner housings 6A, 6B of the electronics box 1 are fluidically connected to each other by two fluid lines 20 according to the second embodiment. In other words, the two inner housings 6A, 6B can communicate with each other fluidically via the two fluid lines 20. The two fluid lines 20 are arranged one above the other in the direction of gravity G. That is, a first fluid line 20A is arranged above a second fluid line 20B in the direction of gravity G, so that the two inner housings 6A, 6B can exchange gas or gaseous dielectric fluid with each other via the first fluid line 20A, whereas the dielectric fluid can flow back and forth between the two inner housings 6A, 6B in the second fluid line 20B.

[0039] A filling port 22 is provided on a geodesically upper wall section of the outer housing 4. This port extends through the outer housing 4 and a wall of the second inner housing 6B into the interior of the second inner housing 6B. The filling port 22 thus forms a fluid connection between an outer surface of the electronics box 1 and the interior of the second inner housing 6B, allowing fluid, in particular the dielectric fluid, to be (re)filled via the filling port 22. The filling port 22 opens with a distal end section into the free volume 18 of the second inner housing 6B. A proximal end section of the filling port 22 is, as shown in Fig. 2 shown, can be closed or covered with a closure lid 24.

[0040] According to the second embodiment, the closure cover 24 has a pressure relief valve through which the separated gas collecting in the free volume 18 can be vented to the environment or out of the electronics box 1. Additionally, the closure cover 24 can also have a vacuum relief valve, allowing air from the environment to flow into the second inner housing 6B. In other words, according to the second embodiment, the closure cover 24 is designed for venting and pressure equalization.

[0041] Due to the two fluid lines 20, dielectric fluid, which is filled into the second inner housing 6B via the filling port 22, can also flow into the first inner housing 6A. Likewise, gas from the first inner housing 6A can flow into the second inner housing 6B via the first fluid line 20A and from there be expelled to the environment via the filling port 22. In other words, the fluid lines 20 enable the free volumes 18 of the two inner housings 6A and 6B to be fluidically connected to form a common expansion volume, which can be vented and filled via the filling port 22.

[0042] In Fig. Figure 3 shows a schematic representation of the electronics box 1 according to a third embodiment. The following description of the electronics box 1 according to the third embodiment will focus solely on the differences compared to the electronics boxes 1 described above according to the first and second embodiments.

[0043] As in Fig. As can be seen in Figure 3, an electronic component 8 is housed in the outer casing 4. To cool this electronic component 8, the outer casing 4 is also partially flooded with the dielectric fluid, forming the free volume 18. The outer casing 4 of the electronic box 1 according to the third embodiment is therefore designed as an immersion-cooled housing. Furthermore, a volumetric molded part 14 is arranged in the outer casing 4, which at least partially forms the fluid supply channel 10 and the fluid discharge channel 12.

[0044] In the electronics box 1 according to the third embodiment, as shown in Fig. Figure 3 shows that one of the inner housings 6 and the outer housing 4 form at least a housing wall in sections. In particular, a base plate of the inner housing 6 is integrally formed with a housing wall of the outer housing 4, which enables a reduction in the weight of the electronics box 1 according to the third embodiment.

[0045] Fig. Figure 4 shows the battery storage unit 2 with the electronics box 1 according to a fourth embodiment. The following description of the electronics box 1 according to the fourth embodiment will focus solely on the differences compared to the electronics boxes 1 described above according to the first to third embodiments.

[0046] The battery storage system 2 has a battery storage housing 26 in which a multitude of battery cells 28 are accommodated. For cooling the battery cells 28, the battery storage housing 26 is designed as an immersion-temperature-controlled housing, which is flooded with the dielectric fluid. The dielectric fluid is circulated by a fluid pump 30 located in the battery storage housing 26, so that the dielectric fluid flows through fluid channels between the battery cells 28 to exchange heat energy with them. In particular, a pressure zone forms within the battery storage housing 26 downstream of the fluid pump 30, in which the dielectric fluid is present at positive pressure. Upstream of the fluid pump 30, or downstream of the battery cells 28, a negative pressure exists, or a suction zone forms, so that the dielectric fluid flows through the fluid channels from the pressure zone to the suction zone.

[0047] As mentioned above, the electronics box 1 is designed and mounted on the battery storage system 2 for controlling and regulating it. Specifically, the electronics box 1 is attached to a geodetically elevated area or located on top of the battery storage system 2. According to the fourth embodiment, the electronics box 1 has a non-immersion-temperature-controlled, dry outer casing 4 and two wet inner casings 6.

[0048] A fluid supply line 32 connects the pressure area of ​​the battery storage housing 26 fluidically to the fluid supply channel 10 of the electronics box 1, so that pressurized dielectric fluid can flow via the fluid supply line 32 to the electronics box 1 and via the fluid supply channel 10 to the electronic components 8. A switching valve 34 is also provided in the fluid supply line 32, via which the supply of dielectric fluid to the electronics box 1 can be controlled. For this purpose, it is advantageous if the switching valve 34 is designed, for example, as a proportional valve.

[0049] In the housing walls of the electronics box 1 and the battery storage housing 26, where the electronics box 1 abuts the battery storage housing 26, at least one through-opening 36 is formed. In other words, according to the fourth embodiment, the electronics box 1 and the battery storage housing 26 have at least one through-opening 36, so that the dielectric fluid, as in Fig. Figure 4 shows that, after cooling the electronic components 8, fluid flows from the electronics box 1 back into the battery storage housing 26, specifically into the suction area. This means that the fluid pump 30 of the battery storage unit 2 serves as a common pump unit for the electronics box 1 and the battery storage unit 2.

[0050] As mentioned above, gas is produced during the cooling of the battery cells 28 and the electronic components 8, which must be discharged from the battery storage housing 26 and the electronics box 1. As in Fig.As can be seen in Figure 4, a degassing line 38 is provided for this purpose, which fluidically connects degassing points 40 of the battery storage unit 2 with the free volume 18 of the electronics box 1 and, in particular, the inner housing 6. This means that the free volume 18 of the inner housing 6 acts as a common expansion volume for the electronics box 1 and the battery storage unit 2. The degassing points 40 are preferably located in geodetically upper regions of the battery storage unit 2. Gas can therefore flow from the battery storage housing 26 via the degassing line 38 into the free volume 18, where, as described above, it can be blown out to the environment via the filling support 22 and the sealing cover 24. Reference symbol list 1 electronics box 2 battery storage units 4 outer casings 6 inner housings 6A first inner housing 6B second inner case 8 Electronic components 10 Fluid supply channel 12 Fluid discharge channel 14 Volume molded part 16 Interior surface 18 free volume 20 Fluid line 20A first fluid line 20B second fluid line 22 filling ports 24 sealing caps 26 battery storage housings 28 battery cells 30 Fluid pump 32 Fluid supply line 34 Switching valve 36 Passage opening 38 Degassing line 40 Degassing point QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] FROM 10 2024 118 149

[0004]

Claims

[1] Electronic box (1) with at least one immersion-temperature-controlled housing (4; 6) which has at least one fluid inlet (10) and at least one fluid outlet (12) so that a dielectric fluid can flow into the housing (4; 6) via the fluid inlet (10) in order to flow around at least one electronic component (8) contained in the housing (4; 6), characterized by , that in the housing (4; 6) a free volume (18) is formed which is not wetted / through which and / or around which the dielectric fluid flows, so that gas separated from the dielectric fluid collects in the free volume (18). [2] Electronic box (1) according to claim 1, furthermore characterized by at least one fluid supply channel (10) formed in the housing (4; 6), which directs the dielectric fluid flowing in via the fluid inlet to the at least one electronic component (8). [3] Electronic box (1) according to claim 1 or 2, furthermore characterized byat least one fluid drainage channel (12) formed in the housing (4; 6), which directs the dielectric fluid flowing around the at least one electronic component (8) to the at least one fluid outlet. [4] Electronic box (1) according to claim 2 or 3, furthermore characterized by at least one volume component (14) arranged in the housing (4; 6) which forms the at least one fluid supply channel (10) and / or the at least one fluid discharge channel (12). [5] Electronic box (1) according to any one of the preceding claims 1 to 4, characterized by , that the at least one immersion-tempered housing (4; 6) is designed as at least one inner housing (6) arranged in an outer housing (4). [6] Electronic box (1) according to claim 5, characterized by , that the outer casing (4) is designed as an immersion-temperature-controlled casing. [7] Electronic box (1) according to claim 5 or 6, characterized by, that at least two immersion-temperature-controlled inner housings (6) are provided, which are connected via at least one fluid line (20). [8] Electronic box (1) according to any one of the preceding claims 1 to 7, characterized by a filling opening (22), preferably closable with a closure lid (24), for filling the electronics box (1) with the dielectric fluid, wherein the filling opening (22) opens into the free volume (18). [9] Battery storage device (2) comprising a plurality of battery cells (28) contained in a battery storage housing (26) and an electronics box (1) arranged on the battery storage housing (26) according to any one of the preceding claims 1 to 8. [10] Battery storage (2) according to claim 9, characterized by, that the battery storage housing (26) is an immersion-temperature-controlled housing and has at least one through-opening (36) for fluidic connection of the battery storage housing (26) with the at least one housing (4; 6) in order to enable an exchange of the dielectric fluid between the battery storage housing (26) and the at least one housing (4; 6).

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