Patent Publication Number: US-2023156977-A1

Title: Vehicle, central compute unit, modules, manufacturing method and vehicle, cooling blade, pocket module, main frame

Description:
RELATED APPLICATIONS 
     The present application claims priority to International Patent App. No. PCT/EP2021/057650 to Andreas Aal, titled “Vehicle, Central Compute Unit, Modules, Manufacturing Method and Vehicle, Cooling Blade, Pocket Module, Main Frame”, filed Mar. 24, 2021, which claims priority to German Patent App. No. 10 2020 204 378.7, filed on Apr. 3, 2020, and German Patent App. No. 10 2020 208 053.4, filed on Jun. 29, 2020, the contents of each being incorporated by reference in their entirety herein. 
    
    
     TECHNICAL FIELD 
     The present disclosure relates to a central compute unit, especially to a vehicle central compute unit, to a pocket module, to an electronic module, to a printed circuit board, to a cooling blade, and to a main frame. Further, the present disclosure relates to manufacturing and to a geometrical concept and arrangement of elements of the central compute unit, the pocket module, the electronic module and the printed circuit board. Moreover, the present disclosure relates to vehicles, especially to a vehicle architecture and to a construction of a Vehicle Central Compute Unit (V-CCU). 
     BACKGROUND 
     Central compute units are known to be installed in vehicles. However, there exist several disadvantages to the known solutions. For example, different construction principles of a plurality of hardware or sub-compute units need to be integrated within one vehicle. The coordination of these different hardware or compute units is complex and inefficient. 
     There seems to be a need for a harmonized approach using different kinds of hardware or compute units in a vehicle provided by different vendors. It would be desirable to use a modular construction. A modular construction principle for electronics is established for many applications like server systems. Also, various Tier1 suppliers of the automobile industry have built their own “rack system”. However, existing “modular” Tier1 constructions only cover limited “compute” and “power” domains, such as related to driver assistant systems or infotainment. This approach leads to multiple non-standardized solutions amongst “compute” and “power” domains. Examples are domain compute units that are built on various supplier-based housing and mainboard configurations that are not compatible between each other. As a consequence, multiple power supplies and mainboards plus eventually hardware extensions only mapped to those individual configurations incl. SW are available. As a result, a complex and expensive system integration may be required. At present it can be observed that a huge number of variants for system integration of those compute units (which may be hardware and/or software) exists. This may result in integration design issues that result into non-optimized hardware and also software operation. Functional loss and fail-operations may arise during development as well as during hardware and software maintenance including change management and the like. A key challenge of a central compute unit-based architecture is the change of the software-defined operation principle from an embedded to a non-embedded system that requires hardware co-design with respect to the operating system and its features chosen. 
     SUMMARY 
     Aspects of the present disclosure are directed to solving the above-mentioned need. 
     In some examples, a cooling blade is configured for cooling an electronic module of a vehicle. The cooling blade comprises at least one connector for connecting to a liquid cooling system of the vehicle and a cooling line for guiding a liquid coolant through the cooling blade for heat transfer. The cooling blade further comprises a heat transfer area for thermal coupling of the electronic module. With the cooling blade a scalable and universal heat transfer interface is provided for integration of electronic modules in a vehicle. 
     The cooling line may be encapsulated in the cooling blade, which may enable an efficient and effective cooling concept for electronic modules. 
     In some examples, the cooling blade may be configured to separate the electronic module from the liquid coolant. Electronic components may be well isolated from the liquid cooling. For example, the cooling blade can further comprise one or more humidity sensors for leakage monitoring, such that a leakage may become detectable before significant damages can result therefrom. 
     Furthermore, the cooling blade may comprise a metal housing with a ground connector. Such that the cooling blade may further be used as electromagnetic shielding for the electronic module. 
     At the cooling blade, the area for thermal coupling of the electronic module may be configured to sandwich the electronic module together with another cooling blade. An even more effective heat dissipation concept may result if the electronic module is sandwiched between two cooling blades, for example, an overall area for thermal coupling may be doubled. 
     In some examples, the cooling blade may be configured to form a cavity for the electronic module together with another cooling blade. That way, a significant part of an outer surface of the electronic module may be used for heat transfer to the cooling blades. 
     The cavity may be configured to allow the electronic module to connect with a main frame interface of a main frame, which is configured to hold the cooling blade. In embodiments, a heat transfer area between a cooling blade and an electronic module may be large but still allow for electronic connection to a main frame interface. For example, the cavity may be also configured to allow the electronic module to connect to another component using a front side connector of the electronic module. The front side connector can be arranged on an opposite side of the main frame interface (which may be on the back side) of a housing of the electronic module. In some examples, the cooling blade may allow for proper electronic coupling to the vehicle and its components while still assuring effective heat dissipation. 
     Furthermore, the cooling blade may be configured to cool electronic modules within a predetermined form factor range. The cooling blade may then become a universal cooling, shielding and protection adapter for electronic modules in the form factor range. 
     Some examples also provide a pocket module, which includes two cooling blades as described herein and an electronic module. In some examples, a main frame may be configured with one, two or more pocket modules. The main frame may be configured to absorb mechanical stress from the one, two or more pocket modules. The main frame may be further configured to shield the pocket module from electro-magnetic radiation while also blocking electro-magnetic emission from the module itself. In some examples, a vehicle is disclosed with such a main frame. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Some other features or aspects will be described using the following non-limiting embodiments of apparatuses or methods or computer programs or computer program products by way of example only, and with reference to the accompanying figures, in which: 
         FIG.  1    shows an electronic module construction under some aspects of the present disclosure; 
         FIG.  2    shows an electronic module construction with further details on an inner construction under some aspects of the present disclosure; 
         FIGS.  3   a  and  3   b    depict cross sections of an electronic module under some aspects of the present disclosure; 
         FIG.  3   c    illustrates a cross section of an electronic module with heat flow indications under some aspects of the present disclosure; 
         FIGS.  4   a  and  4   b    show a PCB construction under some aspects of the present disclosure; 
         FIG.  4   c    depicts a PCB construction under some aspects of the present disclosure; 
         FIG.  5   a    illustrates a pocket module comprising two cooling blades under some aspects of the present disclosure; 
         FIG.  5   b    shows a further example of a pocket module comprising two cooling blades under some aspects of the present disclosure; 
         FIGS.  6   a  and  6   b    illustrate a main interface board under some aspects of the present disclosure; 
         FIG.  7    depicts electronic modules connected to a main frame interface under some aspects of the present disclosure; 
         FIG.  8    shows another connection between electronic modules and a main frame interface under some aspects of the present disclosure; 
         FIGS.  9   a  and  9   b    illustrate a configuration of three pocket modules in a main frame under some aspects of the present disclosure; 
         FIG.  10    depicts a main frame interface in a configuration of three pocket modules in a main frame under some aspects of the present disclosure; 
         FIGS.  11   a  and  11   b    show a backside cover of a mainframe under some aspects of the present disclosure; 
         FIG.  12    depicts further details on a backside cover of a mainframe under some aspects of the present disclosure; 
         FIG.  13    illustrates further details on a backside cover of a mainframe under some aspects of the present disclosure; 
         FIG.  14    depicts a heat transfer fluid connector block on a backside of a mainframe under some aspects of the present disclosure; 
         FIGS.  15   a  and  15   b    show front view configurations of a main frame under some aspects of the present disclosure; 
         FIG.  16    illustrates an alternative configuration of three pocket modules in a main frame under some aspects of the present disclosure; 
         FIG.  17    depicts further details on the alternative configuration of three pocket modules in a main frame under some aspects of the present disclosure; 
         FIG.  18    shows different pocket module configurations or types under some aspects of the present disclosure; 
         FIG.  19    illustrates different pocket module types under some aspects of the present disclosure; 
         FIG.  20    depicts further pocket module types under some aspects of the present disclosure; 
         FIG.  21    shows another example of a pocket module under some aspects of the present disclosure; 
         FIGS.  22   a  and  22   b    illustrate integration of a pocket module under some aspects of the present disclosure; and 
         FIG.  23    depicts a front side of an integrated pocket module under some aspects of the present disclosure. 
     
    
    
     DETAILED DESCRIPTION 
     Various example embodiments will now be described more fully with reference to the accompanying drawings in which some example embodiments are illustrated. In the figures, the thicknesses of lines, layers or regions may be exaggerated for clarity. Optional components may be illustrated using broken, dashed or dotted lines. 
     Accordingly, while example embodiments are capable of various modifications and alternative forms, embodiments thereof are shown by way of example in the figures and will herein be described in detail. It should be understood, however, that there is no intent to limit example embodiments to the particular forms disclosed, but on the contrary, example embodiments are to cover all modifications, equivalents, and alternatives falling within the scope of the present disclosure. Like numbers refer to like or similar elements throughout the description of the figures. 
     As used herein, the term “or” refers to a non-exclusive or, unless otherwise indicated (e.g., “or else” or “or in the alternative”). Furthermore, as used herein, words used to describe a relationship between elements should be broadly construed to include a direct relationship or the presence of intervening elements unless otherwise indicated. For example, when an element is referred to as being “connected” or “coupled” to another element, the element may be directly connected or coupled to the other element or intervening elements may be present. In contrast, when an element is referred to as being “directly connected” or “directly coupled” to another element, there are no intervening elements present. Similarly, words such as “between”, “adjacent”, and the like should be interpreted in a like fashion. 
     The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments. As used herein, the singular forms “a”, “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises”, “comprising”, “includes” or “including”, when used herein, specify the presence of stated features, integers, steps, operations, elements or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components or groups thereof. 
     Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which example embodiments belong. It will be further understood that terms, e.g., those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein. 
     Overall, the present disclosure relates to automotive vehicles and addresses challenges of HW/SW co-design approaches from an electronic function perspective that require also a corresponding system engineering-based co-design on the construction-architecture side of a vehicle computer. According to the concept of the present disclosure, parts within a Vehicle Central Compute Unit (V-CCU) are exchangeable and variable in size. The Vehicle Central Compute Unit (V-CCU) combines a plurality of single hardware units within one Vehicle Central Compute Unit (V-CCU) that also can include redundant units. Thus the present disclosure enables exchangeable and extendable hardware and is able to integrate different sizes of (compare to  FIG.  18   ) power supplies, main boards, extension boards, etc. within a pre-defined form-factor range from different vendors of the supply chain. Also, within the pre-defined form-factor-range plus some standardized board design-rules, the cooling and fixation of the PCBs is standardized and independent of the size (compare to  FIG.  5   a   ) of the PCBs.  FIG.  5   a    illustrates a flexible module size in horizontal direction. In further embodiments, the flexible sizing could be in another or in multiple directions, e.g., in the vertical direction. Moreover, the interface/module connector  4  is shown on the backside of the module, in further embodiments an interface board could be on the bottom side or there could be multiple interfaces/connectors. 
     In this context, the following meanings are utilized herein: 
     PCB=Printed Circuit Board 
     PCBA=assembled Printed Circuit Board 
     CCU=Central Compute Unit (CCU) 
     V-CCU=Vehicle Central Compute Unit 
     The expressions CCU and V-CCU are used within this context interchangeably in relation to a vehicle application 
     ECU=Electronic Control Unit 
     EMC=electromagnetic compatibility 
     EMI=electromagnetic interference 
     ESD=electrostatic discharge 
     OCU=Onboard Connectivity Unit 
     RFI=radio frequency interference 
     ASIL=Automotive Safety Integrity Level 
     HW=Hardware 
     SW=Software 
     ESD=electrostatic discharge 
     T: temperature 
     SAC: Sensor/Actuator Cluster 
     ZeC: Zone electrical Controller 
     The expressions module, module pocket or pocket module are used within this context interchangeably. 
     Further exemplary advantages provided by the present disclosure and advantages of exemplary embodiments thereof are as follows:
         protection of solder joints against mechanical and thermal stress,   protection of electronic components/packages against mechanical and thermal stress   deformation and thermal sensor for overstress detection (i.e., car accident, thus, clear decision whether HW needs to be exchanged), thus, increased functional safety,   many distributed thermal sensors for the overstress detection can potentially also be used for intrusion detection of certain cyber security attacks that create “thermal” deviations,   EMC/EMI and ESD performance, therefore, reduced compensation via additional components required,   no direct shock transfer from hardware housing to electronic components, thus solder ball cracks can be avoided, therefore no functional loss and no signal distortion and no wrongly assumption of software bugs,   providing power supply scalability with hardware compute scaling providing cooling scalability with hardware scaling,   ASIL (Automotive Safety Integrity Level) conform heat-transfer fluid cooling, therefore, no limitations for safety functions,   robust heat-transfer fluid cooling construction,   Thermal, mechanical and EMI (electromagnetic interference) shielding design through “one” construction principle from PCB design connecting to electronic module housing connection to cooling blade connection to shock/vibration resistant mainframe slot,   cost reduced mainframe construction (reduced part of metal), simplicity of design,   no proprietary mainboard solution (compatible between vendors) and open for all, vendors providing hardware upgrades/interchanges,   architecture matchable to operating system of the car manufacturer,   overall, high energy efficiency is provided,   Installed sensors may provide an up-front monitoring for initiating precaution measures for avoiding drop out of electric components, thus the probability of a fault or failure is minimized,   Due to the provided geometry aiming in homogenizing thermal stress to the electronic components a robust concept is provided,   The housing of the central compute unit is scalable in view of power supply and the amount of power, size of electronic modules and number of integrated electronic modules, and   The provided solution provides a robust concept in view of mechanical construction, electromagnetic shielding and thermal robustness.       

     Further advantages, features and applications of the present disclosure are provided in the following detailed description and the appended figures, wherein: 
       FIG.  1    to  FIG.  23    illustrate exemplary embodiments of the present disclosure. 
       FIG.  1    shows an electronic module construction in an embodiment. In  FIG.  1   , an electronic module  9  is shown as standardized electronic module construction. The electronic module has communication interface connectors la and a power connector  1   b  at its front side and a module connector  4  at its back side to connect towards an interface board of a computer mainframe for which details will be outlined subsequently. The electronic module  9  comprises a standard family PCBA metal housing  8  as heat sink. In this embodiment front height and width of the module are standardized but its depth  1   c  contributes to a variable module size and scalability. 
       FIG.  2    shows an electronic module construction in an embodiment with more details on an inner construction.  FIG.  2    shows the same perspective as  FIG.  1    with some insight into the standard family PCBA metal housing  8 . Inside the housing  8  there is the PCB  5  with a number of electronic components  3  (e.g., semiconductor components). As can be seen, the electronic components are thermally coupled to the housing  8  using thermal interface material  6  (TIM). On the PCB  5  there are spacers  2  (spacer dice), which are grounded, and which mechanically and thermally couple the PCB  5  to the housing  8 . The PCB  5  is thereby stabilized against thermal and mechanical stress. By grounding the spacers  2  and the housing  8 , protection against electromagnetic interference (EMI) and electromagnetic compatibility (EMC) can be achieved. Some further exemplary construction features are a simple and cheap construction. 
     EMC can be achieved by electrically grounding the housing  8  and having distributed ground through PCB  5 . The spacer dice  2  can be directly connected to the metal housing  8  thereby achieving thermal and ground coupling. A spacer  2  can be a thermal connection to the housing  8  and a mechanical buffer for electronic components  3 . Mechanical stress can be kept away from or at least be reduced for electronic components. A thickness of the housing metal  8  may be optimized with respect to the construction of the heat-transfer fluid cooling blades  11  as will be shown in the subsequent Figures. 
       FIGS.  3   a  and  3   b    depict cross sections of an electronic module  9  under some aspects of the present disclosure.  FIG.  3   a    shows a cross section of a PCB  5  with electronic components  3 , spacer dice  2 , TIM  6 , and a module housing  8 .  FIG.  3   b    depicts a magnified cross section of the PCB. Here, it can be seen that the PCB  5  comprises a grounded thermal heat distribution layer  7 , which is connected to the spacer dice  2 . In embodiments TIM  6  on the electrical components  3  can be optional as ideally, the heat distribution layer  7  provides enough heat dissipation. 
       FIG.  3   c    illustrates a cross section of an electronic module in an embodiment with heat flow indications. As can be seen there is heat transfer via radiation (e.g., from electrical components  3  towards the housing  8  if no TIM  6  is used) and heat transfer via conduction (e.g., through the spacers  2  and the TIM  6 ). 
       FIGS.  4   a  and  4   b    show a PCB construction in an embodiment.  FIG.  4   a    is a top view of what has been detailed with respect to the previous Figs.  FIG.  4   b    shows a lateral cross section view of the PCB  5 . Sensors  13   a  are embedded in an inner layer of the PCB. These sensors may detect thermal and mechanical stress. The sensors  13   a  are distributed throughout the PCB  5  and may as well help in intrusion detection concepts, e.g., to enable plausibility checks on whether thermal or mechanical stress is or has been present. 
       FIGS.  4   c    depicts a PCB construction in an embodiment in a cross-sectional view with the deformation and temperature sensors  13   a.    
       FIG.  5   a    illustrates a pocket module comprising two cooling blades  11  under some aspects of the present disclosure. Each of the cooling blades is configured to cool an electronic module of a vehicle. A cooling blade  11  comprises at least one connector  12  for connecting to a liquid cooling system of the vehicle and a cooling line (running to the wall of the cooling blade in  FIG.  5   a   ) for guiding a liquid coolant through the cooling blade for heat transfer. The connector  12  is implemented as fluid interface (inlet and/or outlet for fluid) for cooling purposes. In  FIG.  5   a    the connector  12  is shown as one inlet and one outlet per cooling blade  11  resulting in a quadratic arrangement of the connectors  12  in the assembled state in  FIG.  5   a    (two cooling blades  11  forming a module pocket  10 ). Furthermore, as shown in the geometry in  FIG.  5   a   , the connectors  12  are placed with an offset relative to the rest of the backside surface of the cooling blade  11 , e.g., on a shoulder or step of the cooling blade housing. That way, connecting planes for cooling liquid and electrical coupling (e.g., Ethernet) can be offset, which can be advantageous in case of cooling liquid leakage. As further shown in  FIG.  5   a    the connectors  12  are located at the bottom of the cooling blade, so dropping cooling fluid would drop in a direction away from electronics. 
     In some examples, the cooling blade  11  may be configured to form a pocket module  10  together with another cooling blade  11 . The cooling blade  11 , the pocket module  10 , respectively, is configured to cool an electronic module  9  of a vehicle. For example, the electronic module  9  comprises a printed circuit board  5  in a housing  8 . The housing  8  of the electronic module  9  is decoupled from the liquid cooling system. For example, the housing  8  is passive and/or without a connection to the liquid cooling system of the vehicle. The cooling blade  11  may comprise at least one connector  12  for connecting to a liquid cooling system of the vehicle and a cooling line for guiding a liquid coolant through the cooling blade  11  for heat transfer. The cooling blade  11  may further comprise a heat transfer area for thermal coupling of the housing  8  of the electronic module  9 . 
     In some examples, the cooling blades  11  may be made of light material, such as aluminum. The lighter the structure, the less a mechanical stress on coupling or fixation components evoked by the vibration present in a vehicle. Moreover, aluminum provides good heat conduction properties for heat dissipation away from the module. 
     The cooling blade  11  further comprises a heat transfer area for thermal coupling of the electronic module  9 . The heat transfer area is the inner surface being directed towards the electronic module in  FIG.  5   a   . In  FIG.  5   a    the cooling line is encapsulated in the cooling blade and each of the cooling blades is configured to separate the electronic module from the liquid coolant. As further shown in  FIG.  5   a    the cooling blade further comprises a humidity sensor/detector  13   b  for leakage monitoring. The cooling plates  11  further comprise metal housings with a ground connector. 
     As can be further seen in  FIG.  5   a   , the area for thermal coupling of the electronic module  9  is configured to sandwich the electronic module  9  together with another cooling blade  11 . The cooling blades  11  form a module pocket  10  for the electronic module  9 . The arrangement with the two cooling blades  11  forms an example of a pocket module  10  comprising two cooling blades  11  and an electronic module  9 . The two cooling blades  11  are configured to form a cavity (pocket) for the electronic module  9  together with each other.  FIG.  5   a    hence illustrates a module pocket integration of standardized electronic module housings  9  between two heat-transfer fluid cooling blades  11 . 
     As further shown in  FIG.  5   a   , the cavity is configured to allow the electronic module  9  to connect with a main frame interface via module connector  4  of a main frame, which is configured to hold the cooling blade  11 . 
     As further shown in  FIG.  5   a   , the cooling blade  11  is configured to cool electronic modules within a predetermined form factor range. The cooling blade  11  is configured to cool electronic module of different sizes, e.g., with depths of 10 cm, 15 cm, or 20 cm (cm=Centimeter). 
       FIG.  5   b    shows a pocket module  10  comprising two cooling blades  11  under some aspects of the present disclosure. In the embodiment shown in  FIG.  5   b    a customized shape of a heat-transfer cooling blade  11  that fits to the electronic module housing  9  design may be used. This is shown at the bottom of  FIG.  5   b   , where cooling blades  11  of different depths are shown as exemplary variants of heat-transfer fluid cooling blade sizes. Both cooling blade sizes allow to integrate different module housing sizes. Inlet &amp; outlet of the water-cooling blades are monitored against leakage using a sensor, e.g., by an energy harvesting device. A thermal interface between module housing  9  and cooling blades  11  (heat transfer area for thermal coupling of the electronic module  9 ) may use an adhesion fluid (oil) or magnetic layer coating for better coupling. 
       FIGS.  6   a  and  6   b    illustrate a main interface board under some aspects of the present disclosure.  FIG.  6   a    shows a front side connector (transparent view to front side connectors, which form an interface to module constructions) and  FIG.  6   b    shows a backside view with damping elements  16  towards the mainframe construction.  FIG.  6   b    further shows connectors  17  to a communication network (e.g., Ethernet, PCIe (Peripheral Component Interconnect Express)). 
       FIG.  7    depicts electronic modules connected to a main frame interface under some aspects of the present disclosure.  FIG.  7    shows an exemplary configuration of three modules  18 ,  19 ,  20 , each enclosed between cooling blades connected to the mainframe interface board  15 , in a parallel configuration. The three example modules are a power module pocket  18 , a main board module pocket  19 , and a computing extension module pocket  20 . As further illustrated by  FIG.  7   , an electronic module may have a front side connector  21  to connect to further components. This example shows that the cavity formed by the blades  11  can be configured to allow the electronic module to connect to another component using a front side connector  21  of the electronic module. The front side connector  21  is arranged on an opposite side of the main frame interface of a housing of the electronic module. 
       FIG.  8    shows another connection between electronic modules and a main frame interface under some aspects of the present disclosure. In this embodiment, the power module  18  has a front side connector  21  to the computer mainframe (shock and vibration isolated) connecting to vehicle power. 
       FIGS.  9   a  and  9   b    illustrate a configuration of three pocket modules in a main frame under some aspects of the present disclosure.  FIGS.  9   a ,  9   b    depict a main frame with two or more pocket modules according to the above.  FIG.  9   a    shows a front cover of the computer mainframe with openings or adapters (dependent on the electronic module length within a module pocket) to an electronic module connector.  FIG.  9   b    shows a front cover side view with vibration and shock isolation  27  through elastomeric damping sheets and which could also enclose air bubble based damping elements. Moreover, there is a layer of electrically-conductive silicone elastomers  28  that provide shielding against electromagnetic interference (EMI) and radio frequency interference (RFI). 
       FIG.  10    depicts a main frame interface in a configuration of three pocket modules in a main frame under some aspects of the present disclosure.  FIG.  10    shows a backside cover of the computer mainframe with openings or adapters (dependent on the electronic module length within a module pocket) to electronic module connectors. 
       FIGS.  11   a  and  11   b    show a backside cover of a mainframe under some aspects of the present disclosure.  FIG.  11   a    shows a backside cover lateral view and  FIG.  11   b    shows a backside cover side view with a layer of vibration and shock isolation  27  through elastomeric damping sheets, which could also enclose air bubble based damping elements, and a layer of electrically-conductive silicone elastomers  28  that provide shielding against electromagnetic interference (EMI) and radio frequency interference (RFI). The main frame is configured to shield the pocket module from electro-magnetic radiation. 
       FIG.  12    depicts further details on a backside cover of a mainframe under some aspects of the present disclosure.  FIG.  12    shows an exemplary configuration of three modules enclosed between cooling blades connected to the mainframe interface board without backside cover and transparent interface board  15 . Shock/vibration damping elements are used to mechanically decouple the main frame. The main frame is configured to absorb mechanical stress from the two or more pocket modules. Exemplary ethernet connectors  17  are further shown on the back side. 
       FIG.  13    illustrates further details on a backside cover of a mainframe under some aspects of the present disclosure. In this example, the backside cover  31  of the computer mainframe is transparent. It can be seen how the backside cover  31  covers the backsides of the cooling blades  11  but their cooling connectors. 
       FIG.  14    depicts a heat transfer fluid connector block on a backside of a mainframe under some aspects of the present disclosure.  FIG.  14    shows another exemplary configuration of three modules enclosed between cooling blades connected to the mainframe interface board with a backside cover  31 . A heat-transfer fluid connector clock  35  provides robust protection of pocket module inlets/outlets. 
       FIGS.  15   a  and  15   b    show front view configurations of a main frame under some aspects of the present disclosure. As can be seen several front connectors may vary in embodiments, for example, with different module combinations as will be detailed in the sequel. 
       FIG.  16    illustrates an alternative configuration of three pocket modules in a main frame under some aspects of the present disclosure. In this example, the electronic modules are stacked  26  as opposed to the parallel configurations  25  shown in the previous Figs.  FIG.  16    illustrates that the mainframe may use different geometries in embodiments. 
       FIG.  17    depicts further details on the alternative configuration of three pocket modules in a main frame under some aspects of the present disclosure. As shown, different module and therewith front connector configurations are conceivable. 
       FIG.  18    shows different pocket module configurations under some aspects of the present disclosure. As shown at the top on the left, a power module pocket  18 , may be formed by the cooling blades. A power module  21  may have a front side connector  21  to the computer mainframe (shock/vibration isolated) connecting to vehicle power.  FIG.  18    further shows a main board module (for an operating system) pocket  19  at the top on the right. Other modules are a general-purpose hardware extension module pocket  20 , an onboard connectivity unit (OCU) module pocket  22  with a separate power connector for always on operation or alternatively power domains for low power features, a general-purpose interface extension module pocket  23 . Both of which have communication interface connectors  1   a , which may provide an easy upgrade option to modern communication interfaces and new sensor types even when the wire harness platform infrastructure is already fixed.  FIG.  18    further illustrates an artificial intelligence module pocket  24  at the bottom, which also has communication interface connectors la, for example, with an option for fiber optic interfaces (ultra-high bandwidth data communication between sensors and data fusion processing). 
       FIG.  19    illustrates different pocket module types under some aspects of the present disclosure. A power module pocket  18  is shown at the top. The power module has a front side connector  21  to the computer mainframe (shock/vibration isolated) connecting to vehicle power. A main board module pocket  19  is show at the bottom, which may be used to run an operating system. 
       FIG.  20    depicts further pocket module types under some aspects of the present disclosure. On the left, a general-purpose hardware extension module pocket  20  is shown. In the middle an OCU module pocket  22  with a front side connector  21  is depicted. A general-purpose interface extension module pocket  23  is shown on the right, which also has a communication interface connector  1   a . The latter may provide an easy upgrade option to modern communication interfaces and new sensor types even when wire harness infrastructure is already fixed. 
       FIG.  21    shows another embodiment of a pocket module, which is an artificial intelligence (AI) module with a communication interface connector  1   a  under some aspects of the present disclosure. The communication interface connector  1   a  may be an option for fiber optic interfaces (ultra-high bandwidth data communication between sensors &amp; data fusion processing). 
       FIGS.  22   a  and  22   b    illustrate integration of a pocket module under some aspects of the present disclosure.  FIG.  22   a    shows a front side view of a module pocket integrated within a mainframe slot  29 . Main frame construction features are a simple and cheap construction, an integrated EMI shielding  28 , shock/vibration absorbers  27 , integrated interface board  15 , and central heat-transfer fluid inlet/outlet supplying to the cooling blade  11 .  FIG.  22   b    shows a magnification of the vibration and shock isolation using air bubbles. 
       FIG.  23    depicts a front side of an integrated pocket module under some aspects of the present disclosure.  FIG.  23    shows a front side view of a module pocket integrated within a mainframe slot  29 . On the left the mainframe is shown without front cover and the different front connectors can be seen. 
     Another example includes a vehicle with a main frame as described herein. 
     Construction architectures of the Vehicle Central Computer Unit (V-CCU or CCU or mainframe) comprising PCB and electronic module-building elements may be configured as follows: 
     ( 5 ) PCB with special design rules and form-factor range [compare to  FIGS.  3  and  4   , including ( 2 ), ( 6 ), ( 7 ), ( 13   a )]
 
( 9 ) standardized electronic module housing family (form-factor range) [compare to  FIGS.  1  and  2   , including elements ( 1   a ), ( 1   b ) and ( 4 )]
 
( 10 ) standardized module pocket family (form-factor range) [compare to  FIG.  5   , including elements ( 9 ), ( 11 ), ( 13   b ) and ( 14 )]
 
computer mainframe ( 29 ) [compare to  FIG.  9 - 17   , including element ( 10 ) with its variants ( FIG.  19   ), elements (elements  15 ,  16 ,  17  in  FIG.  6   ), (elements  27 ,  28 ,  30  in  FIG.  9   ), (elements  27 ,  28 ,  31  in  FIG.  11   ) and mainframe slot design including (elements  27 ,  28  in  FIG.  22   )
 
the CCU comprises a ( 29 ) computer mainframe with integration slots for ( 10 ) module pockets;
 
the mainframe shape can be customer specific, exemplary variants are ( 25 ) the parallel type and ( 26 ) the stacked type;
 
the inner surfaces of the mainframe&#39;s slots may be coated with ( 27 ) anti-shock/vibration elastomeric damping sheets and ( 28 ) electrically-conductive silicone elastomers for EMI (electromagnetic interference) shielding or a combination of ( 27 ) and ( 28 );
 
the mainframe construction may include an ( 15 ) interface board that is fixed via ( 16 ) damping elements to the mainframe;
 
the mainframe construction may include a central heat-transfer fluid inlet/outlet that supplies the fluid to ( 11 ) heat-transfer fluid cooling blades that are part of ( 10 );
 
to complete a CCU, at least a ( 18 ) power module pocket and a ( 19 ) main board module pocket may be integrated into ( 29 ); this does not exclude the variant of a mainboard module pocket with a power supply included;
 
the highest form of covering functional requirements through dedicated HW integration into the CCU may be established by additionally integrating ( 20 ) general purpose HW extension module pockets, an ( 22 ) OCU Module pocket, an ( 24 ) AI module pocket (AI=Artificial Intelligence) and ( 23 ) general purpose interface extension module pockets (SAC, ZeCs)
 
Specific features of those pocket module types are illustrated in the drawings, especially in  FIGS.  18  to  21   .
 
     Construction of the module pocket ( 10 ) may be configured as follows: 
     Each module pocket that is easily inserted/integrated into the computer mainframe may comprise two fluid cooling blades ( 11 ) that may enclose a standardized electronic module housing ( 9 ).
 
Additional construction features like fluid leakage monitor ( 13   b ) and module-blade interfacing ( 14 ) of the module pocket are illustrated in  FIGS.  5     a, b.  
 
     Construction of the standardized electronic module ( 9 ) may be configured as follows: 
     Construction features ( 1   c ) comprising a scalable metal housing ( 8 ), automotive compliant connector ( 4 ) to the mainframe interface board ( 15 ), optional front side interface connectors ( 1   a ), optional front side power connector ( 1   b ) of the electronic module are illustrated in  FIG.  1   . 
     Design principle of the PCB/PCBA ( 5 ) within ( 9 ) may be configured as follows: 
     Construction features [( 2 ) spacer dice, ( 6 ) thermal interface material, ( 7 ) grounded thermal distribution layer, ( 13   a ) mechanical deformation monitor and geometric arrangement of such features] of the ( 5 ) assembled PCB (printed circuit board) are illustrated in  FIGS.  3  and  4   . Mechanical deformation may be monitored by integrated sensors. 
     Further configurations include: 
     The design of the ( 5 ) assembled PCB has predefined features in accordance to this present disclosure that add to the individual design of an electronic module and enable the usage of sensitive leading-edge components (conformal heat distribution—avoidance of harsh heat cycles, improved grounding and EMI shielding, mechanical stability and decoupling of (thermo-)mechanical forces from housing to electronic components). For example, a construction forced conformal heat distribution reduces thermally induced mechanical stress gradients as cause for cracks, delamination etc.
 
The electronic module and pocket design principle allows maximum sizing flexibility with standardized module sizes.
 
The separation of cooling blades, electronic modules plus standardized module shapes allow to purchase from different vendors by keeping the compatibility
 
the connection between electronic modules may be established via the interface board, and this simplifies scalability as the power supply can be exchanged dependent on the actual power needed (redundant power source addition possible)—thus cost optimization is an advantage.
 
The anti-shock/vibration construction plus optimized cooling and EMI shielding enable unique operation features (sensitive leading-edge semiconductors, optical fiber interfacing etc.) to be integrated into electronic modules.
 
     A vehicle may be understood as a device for transporting persons and/or goods, such as passenger vehicles, trucks, busses, trains, ships, drones, aircrafts, space crafts and the like. The present disclosure is preferably installed in a vehicle of the automotive industry, especially to a car, a bus or a truck, but not limited to these applications. 
     A Vehicle Central Compute Unit (Vehicle CCU) may be understood as a device used for computing data and/or information regarding a vehicle. The Vehicle CCU may be installed on-board of the vehicle. Parts of the Vehicle CCU may be located or at least be interactive with a compute device off-board, such as a cloud computing system or a computing entity. Moreover, the Vehicle CCU may be portable and exchangeable. Thus, the Vehicle CCU or its pocket modules may be replaced in the vehicle during maintenance of the computing system. 
     The present disclosure provides a solution for a centralized compute unit. The suggested construction and integration of such a unit may replace a plurality of single control units in a vehicle. The solution may be implemented in high integrated electronic systems, especially which may be related to security sensitive applications. Especially the provided solution may be applicable for applications of high life-span products which may have a high environmental impact. These applications may be found in automotive industry, in aircraft and space industry as well as ship and train vehicles. 
     Moreover, the present disclosure and exemplary embodiments thereof relate to the construction architecture of a Vehicle Central Compute Unit (V-CCU) that provides implementation solutions to challenges around complexity management, scalability, upgradeability, easy exchangeability, optimized power and thermal management, EMI issue avoidance/reduction and especially safety/reliability enablement for current and future leading-edge electronics. 
     While above several exemplary embodiments of the present disclosure has been described, it has to be noted that a great number of variations thereto exists. Furthermore, it is appreciated that the described exemplary embodiments only illustrate non-limiting examples of how the present disclosure can be implemented and that it is not intended to limit the scope, the application or the configuration of the herein-described apparatuses and methods. Rather, the preceding description will provide the person skilled in the art with constructions for implementing at least one exemplary embodiment of the present disclosure, wherein it has to be understood that various changes of functionality and the arrangement of the elements of the exemplary embodiment can be made, without deviating from the subject-matter defined by the appended claims and their legal equivalents. 
     The following provides an overview of aspects of the present disclosure: 
     Aspect 1 is a printed circuit board ( 5 ) comprising electronic components ( 3 ), a thermal distribution layer ( 7 ) and at least one spacer element ( 2 ), wherein the thermal distribution layer ( 7 ) is integrated inside the printed circuit board ( 5 ), and wherein the at least one spacer element ( 2 ) is connected to the printed circuit board ( 5 ) on its outer side. 
     Aspect 2 may be combined with aspect 1 and includes that the thermal distribution layer ( 7 ) is a plane layer within the thermal distribution layer ( 7 ). 
     Aspect 3 may be combined with any of aspects 1 and/or 2 and includes at least one embedded temperature and mechanical deformation sensor ( 13   a ). 
     Aspect 4 may be combined with any of aspects 1 through 3 and includes that the printed circuit board ( 5 ) is connected with the spacer element ( 2 ) via a connection, wherein the connection is a thermal connection as well as an electrical connection. 
     Aspect 5 is an electronic module ( 9 ) comprising a housing ( 8 ), a printed circuit board ( 5 ), 
     and at least one spacer element ( 2 ) between the housing ( 2 ) and the printed circuit board ( 5 ). 
     Aspect 6 may be combined with aspect 6 and includes that the electronic module ( 9 ) is a printed circuit board ( 5 ) according to any of aspects 1 through 4. 
     Aspect 7 may be combined with any of aspects 5 and/or 6, and includes a power interface. 
     Aspect 8 may be combined with any of aspects 5 through 7, and includes a communication interface. 
     Aspect 9 may be combined with any of aspects 5 through 8, and includes that, in operation, the electronic module ( 9 ) has at least one heat source ( 3 ) and at least one heat sink ( 2 ), ( 7 ), ( 8 ), ( 11 ), wherein inside the housing of the electronic module ( 9 ) a thermal distribution layer ( 7 ) of a printed circuit board ( 5 ) is installed for distributing the thermal energy of the heat source to the heat sink. 
     Aspect 10 is a pocket module ( 10 ) comprising at least one electronic module according to any of aspects 5-8, and includes a module housing, a module connector, and at least one fluid interface. 
     Aspect 11 may be combined with aspect 10 and includes a first heat transfer cooling blade ( 14 ) and a second heat transfer cooling blade ( 14 ). 
     Aspect 12 may be combined with any of aspects 10 and/or 11 and includes a humidity sensor ( 13   b ). 
     Aspect 13 may be combined with any of aspects 10 through 11 and includes internal space for installation of one or more electronic modules ( 9 ) of different sizes. 
     Aspect 14 may be combined with any of aspects 10 through 13 and includes a thermal interface between the module housing and the cooling blades ( 14 ), preferably a adhesion fluid (oil) or magnetic layer coating. 
     Aspect 15 may be combined with any of aspects 10 through 14 and includes a step-shaped geometry, preferably provided in the lower part of the pocket module ( 10 ). 
     Aspect 16 is a central compute unit, such as a vehicle central compute unit, comprising a mainframe with integrated slots for a plurality of pocket modules ( 10 ) according to any of aspects 10-15. 
     Aspect 17 may be combined with aspect 16 and includes an interface board ( 15 ), which has preferably damping elements for damping mechanical vibrations. 
     Aspect 18 may be combined with any of aspects 16 and/or 17 and includes a power module ( 18 ). 
     Aspect 19 may be combined with any of aspects 16 through 18 and includes at least one module out of the group of modules: a main board module, a central HW extension module, an OCU module, an AI module, an interface, in particular an interface module ZeC or in particular an interface as an interface extension module SAC, a communication module and a wireless communication module. 
     Aspect 20 may be combined with any of aspects 16 through 19 and includes one or a plurality of vibration damping elements ( 16 ). 
     Aspect 21 may be combined with any of aspects 16 through 20 and includes one or a plurality of thermal guiding elements. The thermal guiding elements may define the heat transfer flow. 
     Aspect 22 may be combined with any of aspects 16 through 21 and includes one or a plurality of temperature and/or deformation sensors. 
     Aspect 23 may be combined with any of aspects 16 through 22 and includes at least one electromagnetic shielding element. 
     Aspect 24 may be combined with any of aspects 16 through 23 and includes a front cover. 
     Aspect 25 may be combined with any of aspects 16 through 24 and includes a back cover. 
     Aspect 26 is a manufacturing method for manufacturing a printed circuit board ( 5 ) according to aspects 1-4, comprising providing elements of the printed circuit board ( 5 ) and assembling the elements. 
     Aspect 27 is a manufacturing method for manufacturing a electronic module ( 9 ) according to aspects 5-9, comprising providing elements of the electronic module ( 9 ) and assembling the elements. 
     Aspect 28 is a manufacturing method for manufacturing a pocket module ( 10 ) according to any of the proceeding items, comprising providing elements of the pocket module ( 10 ) and assembling the elements. 
     Aspect 29 is a manufacturing method for manufacturing a central compute unit according to aspects 16-25, and includes providing elements of the central compute unit and assembling the elements. 
     Aspect 30 is a vehicle comprising a central compute unit according to any of aspects 16 to 25, preferably the central compute unit is installed within the vehicle. 
     Aspect 31 may be combined with aspect 30 and includes that the vehicle is a car, a bus or a truck. 
     REFERENCE LIST 
     ( 1   a ) communication interface connectors 
     ( 1   b ) power connector 
     ( 1   c ) variable module size 
     ( 2 ) spacer element, for example spacer dice, spacer element preferably grounded 
     ( 3 ) electronic component, for example a semiconductor 
     ( 4 ) module connector towards the interface board of the computer mainframe 
     ( 5 ) printed circuit board/PCB/PCBA 
     ( 6 ) TIM (thermal interface material) utilized as thermal guiding element 
     ( 7 ) TDL (thermal distribution layer), preferably electrically grounded, utilized as thermal guiding element 
     ( 8 ) module housing, preferably made of metal 
     ( 9 ) electronic module, preferably a standardized electronic module 
     ( 10 ) module pocket 
     ( 11 ) cooling blade 
     ( 12 ) fluid interface (inlet and/or outlet) for cooling by fluid, see for example  FIG.  5   a      
     ( 13   a ) embedded sensor, suitable for energy harvesting device, mechanic deformation and/or temperature 
     ( 13   b ) humidity sensor for detecting humidity (humidity detector) 
     ( 14 ) adhesion fluid (oil) or magnetic layer coating 
     ( 15 ) interface board 
     ( 16 ) shock/vibration damping element 
     ( 17 ) connector to communication network 
     ( 18 ) power module pocket 
     ( 19 ) main board module pocket 
     ( 20 ) general purpose HW extension module pocket 
     ( 21 ) front side connector to the computer mainframe 
     ( 22 ) on-board connectivity module pocket 
     ( 23 ) general purpose interface extension module pocket, for example named SAC or ZeC 
     ( 24 ) AI module pocket 
     ( 25 ) parallel type version of computer mainframe ( 29 ) 
     ( 26 ) stacked type version of computer mainframe ( 29 ) 
     ( 27 ) mechanical damping element, for example elastomer material, purpose of vibration and shock isolation through for example elastomeric damping sheets—optionally mechanical damping element could enclose air bubble structure 
     ( 28 ) electrical shielding element, for example electrically-conductive silicone elastomers that provide shielding against electromagnetic interference (EMI) and radio frequency interference (RFI) 
     ( 29 ) computer mainframe 
     ( 30 ) front cover of computer mainframe 
     ( 31 ) backside cover of computer mainframe 
     ( 32 ) heat transfer flow, see for example  FIG.  3   c      
     ( 33 ) heat transfer via radiation, see for example  FIG.  3   c      
     ( 34 ) heat transfer via conduction, see for example  FIG.  3   c      
     ( 35 ) heat-transfer fluid inlet/outlet at central mainframe, heat-transfer fluid connector block (robust protection of pocket module inlets/outlets)