Electric vehicle charging system and method

Abstract

An electric vehicle charging station parking block. In one aspect, a method includes forming a curb segment having cable segments embedded therein; installing an EV stand between two curb segments; connecting the EV stand to a cable segment embedded in one of the curb segments; connecting a different cable segment embedded in a different curb segment to the EV stand; connecting a different EV stand to an opposite end of the different cable segment; and connecting one of the cable segment or the different cable segment to a power source.

Description

ELECTRIC VEHICLE CHARGING SYSTEM AND METHODBACKGROUND

[0001] This specification relates to charging systems, such as electronic vehicle (EV) charging systems. An electric vehicle charging system provides electric energy to recharge the battery of an electric vehicle. A charging port physically connects to the car and enables power to flow to the EV battery by way of a cord that connects the EV charging port to a charger of the EV charging system.SUMMARY

[0002] In general, one innovative aspect of the subject matter described in this specification can be embodied in a device including a charging stand configured to be secured to a base surface, the charging stand including: two electrical interfaces configured to electrically connect the charging stand to (i) a power source and (ii) an additional charging stand; and a charger interface configured to removably connect, physically and electrically, to an EV charger.

[0003] These and other embodiments can each optionally include one or more of the following features. The charger interface can include a branch device configured to electrically connect the charger interface to the two electrical interfaces. The branch device can be a connectorized device configured to electrically connect the two electrical interfaces with connectors that terminate two power cables. The charger interface can include a recess in a top of the charging stand, wherein the recess is configured to receive a bottom of the EV charger within side walls of the charging stand. The charger interface can include conductive contacts located on interior side walls of the recess or a bottom of the recess. The conductive contacts can be configured to provide an electrical connection between the EV charger and the charging stand. The EV charging system can include a curb segment having a cable segment embedded therein. A connector at an end of the cable segment can be exposed from the curb segment and is configured to connect to one of the two electrical interfaces.

[0004] In general, another innovative aspect of the subject matter described in this specification can be embodied in a method including the operations of forming a curb segment having cable segments embedded therein; installing an EV stand between two curb segments;connecting the EV stand to a cable segment embedded in one of the curb segments; connecting a different cable segment embedded in a different curb segment to the EV stand; connecting a different EV stand to an opposite end of the different cable segment; and connecting one of the cable segment or the different cable segment to a power source.

[0005] Particular embodiments of the subject matter described in this specification can be implemented so as to realize one or more of the following advantages. For example, the subject matter described herein can reduce the complexity of installing EV charging stations by providing a “plug and play” solution for EV charging station installation, and reduces tripping hazards that can be caused by power cables that connect the EV charging station to a power source.

[0006] A series of EV chargers can be electrically connected to a power source through cabling that is embedded in concrete structures as they are formed / arranged between the EV chargers. When the concrete structures cure, they provide protection for the cabling to keep it from being damaged, thereby reducing potential EV charger outages or dangerous situations where damaged electric cabling is exposed. Installation of each EV charger is simplified because the cabling between the EV chargers is connectorized, and a branch connector is configured to receive connections from two connectorized cables and an EV stand. This configuration enables power to flow through the connectorized cabling, as well as provide power to the EV stand without requiring any in-the-field electrical work. By connecting additional connectorized cables and branches together, a series of multiple different EV chargers can be installed in a “plug and play” manner, which does not require the experience of an electrician.

[0007] The EV stands further simplify the installation of EV chargers because the EV stands can be configured to receive connectorized EV charging stations that can simply plug into the EV stand. Again, this does not require the experience of an electrician, and is much faster than having to make and test individual electrical connections with bare wire. For example, when the EV charger is placed into the EV stand a connector of the EV charger can slide into connection with a corresponding connector in the EV stand, thereby enabling the connection of the EV charger to power.

[0008] Furthermore, the use of an EV stand can provide a universal interface that allows for EV components (e g., chargers, branch devices, connector interfaces, etc.) to be used together.For example, the EV stand can be configured to connect to a variety of equipment from different manufacturers, thereby enabling equipment from different manufacturers to be used together.

[0009] Connection sleeves can be used to retrofit previously manufactured EV chargers for use with EV stands. For example, the connection sleeves can be attached to, or placed over, a bottom portion of an EV charger, and include an interface (e.g., electrical and / or physical interface) for connecting to an EV stand. In this way, EV chargers that were not manufactured for use with EV stands can be adapted for use in installations that use EV stands.

[0010] The use of EV stands and / or connection sleeves can facilitate easy equipment upgrades in the field. For example, when new EV chargers (e.g., more efficient or powerful EV chargers) are introduced, EV chargers that were previously installed in the EV stands discussed herein can simply be unplugged, and replaced with the new EV chargers. The use of connection sleeves can help ensure continued physical / electrical compatibility with the previously installed EV stands, for example, by creating a connection sleeve that provides an appropriate physical / electrical connection between the previously installed EV stand and a new EV charger.

[0011] The details of one or more embodiments of the subject matter described in this specification are set forth in the accompanying drawings and the description below. Other features, aspects, and advantages of the subject matter will become apparent from the description, the drawings, and the claims.BRIEF DESCRIPTION OF THE DRAWINGS

[0012] FIG. 1 is an illustration of an electronic vehicle (EV) connected to an EV charger.

[0013] FIG. 2 is an illustration of an EV charging system that utilizes “plug and play” connections.

[0014] FIG. 3 is a top view of the EV stands and as arranged in FIG. 2.

[0015] FIG. 4 is another top view of the EV stands as arranged in FIG. 2.

[0016] FIG. 5 is a side view of the EV stand and the curb structures.

[0017] FIG. 6 is an illustration of the EV charger being inserted into the recess of the EV stand.

[0018] FIG. 7 is a side view of an EV charger being retrofitted with a connection sleeve.

[0019] FIG. 8 is a side view of an EV charger interfacing with a connection sleeve.

[0020] FIG. 9A is a side view of an EV stand having a branch device installed.

[0021] FIG. 9B is a top view of the EV stand.

[0022] FIG. 10 is a side view of an EV stand installed in combination with an uneven ground curbing solution.

[0023] FIG. 11 is a side view of an example installation of an EV stand and curb segments on uneven ground.

[0024] FIG. 12 is a flow chart of an example process for creating an EV charging system.

[0025] Like reference numbers and designations in the various drawings indicate like elements.DETAILED DESCRIPTION

[0026] FIG. 1 is an illustration 100 of an electronic vehicle (EV) 110 connected to an EV charger 120. As shown, the EV charger 120 has a charging cord 130 that connects the EV charger to a charging port 140, which physically connects the EV charger 120 to the EV 110. Usually, the EV charger 120 is installed by an electrician be making electrical connections of a power source to the EV charger 120. This type of installation generally requires a licensed electrician to ensure that the appropriate connections are made between the power cable providing power to the EV charger 120 and the appropriate electrical connections of the EV charger 120. Furthermore, any manual connections made may need to be tested, extending the time required to perform the installation. The time required to perform the installation can be extended even further if manual wire splices or other connections must be made manually. As described in detail throughout this specification, the time required to install an EV charger can be reduced and simplified by using a set of connectorized components that are configured to enable a “plug and play” type installation.

[0027] FIG. 2 is an illustration of an EV charging system 200 that utilizes “plug and play” connections. The system 200 includes a power source 202 that provides power to a series of EV chargers, such as the EV charger 204 and EV charger 206. The power source 202 can provide a connection to the grid (e.g., through a breaker box), or another appropriate source of power (e.g., a connection to renewable energy source, such as a set of solar panels).

[0028] The power provided by the power source 202 is distributed to EV charger 204 by way of a cable segment 208, which electrically connects the power source to a branch device 210 located within (or near) an EV stand 212. The cable segment 208 passes through a curb structure 214, such as a parking block, and into the EV stand 212, where it connects to thebranch device 210. As discussed in more detail below, the curb structure 214 can be formed of concrete, and the cable segment 208 can be set into, or otherwise embedded into, the curb structure 214 when it is formed (e.g., before the material used to form the curb structure 214 has hardened). The curb structure 214 can also be hardened rubber or plastic, or another appropriate material. In some implementations, the cable segment 208 can be embedded into the curb structure 214 after it has been formed (e.g., by creating a channel through which the cable structure 214 is fed). In some implementations, the cable segment 208 need not be embedded in the curb structure 214.

[0029] The branch device 210 includes multiple electrical connection interfaces, and is configured to provide power provided through the cable segment 208 to one or more additional components. For example, the branch device 210 can be a “Y” type device that has one input connection interface, and two output connection interfaces. In this example, the branch device 210 can be configured to receive the connector of the cable segment 208 as input, and the two output connections of the branch device 210 can be configured electrically connect to each of the EV charger 204 and the cable segment 216, which connects the branch device 210 to another branch device 218 located in another EV stand 220. Similarly, the branch device 218 can be configured to electrically connect the cable segment 216 to the EV charger 206 and yet another cable segment 222, thereby providing power to the EV charger 206 and any additional components that are connected to the cable segment 222, such as another branch device and / or EV charger (not shown).

[0030] As shown, the cable segments 216 and 222 respectively pass through (e.g., are embedded in) curb structures 224 and 226, which are similar to the curb structure 214. While a “Y” type device is provided as an example of the branch devices 210 and 218, the branch devices can have any structure (electrically and physically) that facilitates an appropriate electrical connection (e.g., for the current and voltage being distributed) for delivering power to the EV chargers 204 and 206, as well as any other components that are electrically connected to the cable segment 222 and beyond.

[0031] The connection between the cable segment 208 and the branch device 210 is made by a pair of complementary connectors (e.g., male and female connection interfaces). For example, the cable segment 208 can have a male electrical connector that is configured to be inserted into (received by) a corresponding female connector of the branch device 210, orvice versa. Using cable segments and branch devices having standard connectors that are factory built, and appropriately rated for use in an EV charging system, enables connections to be made between the cable segments and branch devices without electrical expertise, and in less time than would be required to connect each conductor of the cable segments to corresponding conductor connection points in the EV chargers 204 and 206, or the EV stands 212 and 220.

[0032] The EV stands 212 and 220 are each configured to support the EV chargers 204 and 206. As illustrated, the EV stands 212 and 220 are each configured to receive a portion of the EV chargers 204 and 206 within recesses defined in the EV stands 212 and 220. In some implementations, the EV stands 212 and 220 can be configured so that the EV chargers 204 and 206 sit flush with (e.g., rest on) a top surface of the EV stands 212 and 220. For example, the EV stands 212 and 220 can be configured to have the EV chargers 204 and 206 bolted to, or otherwise secured to (e.g., with adhesive), the top surfaces of the EV stands 212 and 220.

[0033] In some implementations, the locations of the EV stands 212 and 220 can be selected to provide a “safe area” between EV parking locations 232. The safe areas 230 can be areas that are designated to be “car free” so that people using the EV chargers 204 and 206 can safely exit their vehicle, operate the chargers 204 and 206, and connect a charging cord to their EVs.

[0034] The EV stands 212 and 220 are shown as being secured to the ground with ground anchors 228, which can be anchor bolts. For example, the EV stands 212 and 220 can be bolted to the surface of the pavement or concrete using concrete anchors. The anchors often include a threaded rod, typically made of steel that is embedded into the concrete, with a nut and washer on the end to hold the block in place. In some cases, adhesive (e.g., asphalt adhesive) may be used by itself, or used in conjunction with the anchor bolts to secure the EV stands 212 and 220.

[0035] In some implementations, the EV stands 212 and 220 are configured to electrically interface with the EV chargers 204 and 206 in a “plug and play” manner. For example, as discussed in more detail below, the EV stands 212 and 220 can be connectorized in a manner such that when the EV chargers 204 and 206 are inserted into, or otherwise secured to, theEV stands 212 and 220, electrical connections between the EV charger and the EV stand are made, i.e., without having to manually connect individual wires or conductors.

[0036] FIG. 3 is a top view 300 of the EV stands 212 and 220 as arranged in FIG. 2. As shown, the power source 202 is connected to the branch device 210 by the cable segment 208, and the branch device 210 is connected to the branch device 218 by the cable segment 216. This top view 300 shows the recesses 302 and 304 in the EV stands 212 and 220, which are configured to received EV chargers (not shown).

[0037] In this configuration, the bottom of the recesses 302 and 304, each have three connection interfaces 306 (e.g., depicted as three white circles). Each of the connection interfaces 306 is configured to engage with a corresponding connection interface located on the bottom of a charging station. For example, when the connection interfaces 306 are connector receptacles (e g., female connector interfaces), they are configured to receive male connector interfaces located on the bottom of an EV charger. When the connection interfaces 306 are male connector interfaces, they are configured for insertion to the corresponding connector receptacles located on the bottom of an EV charger inserted into the recesses 302 and 304. The connection interfaces 306 are depicted as circular, but they could be any appropriate shape, and also differ in shape relative to each other.

[0038] In some implementations, the connection interfaces 306 are formed in the branch devices 210 and 218, which are shown as being mounted flush to the bottom of the recesses 302 and 304. In some implementations, the connection interfaces 306 are formed in the bottom of the recesses 302 and 304, and the branch devices 210 and 218 are connected to the connection interfaces using patch cables or wires, as discussed in more detail below. The patch cables or wires can be installed at the time of manufacturing the EV stands 212 and 220 to eliminate the need to make in-field electrical connections outside of connecting wire harnesses or other connectors.

[0039] When the connection interfaces 306 are formed in the bottom of the recesses 302 and 304 (e g., not as part of the branch devices 210 and 218), the opposite end of the connection interfaces 306 can have a connector interface (e.g., a wire harness connector) that is configured to receive a connectorized cable that connects the branch devices 210 and 218 to the connector interfaces 306 that engage the EV chargers. This enables a fully “plug andplay” installation because the only connections to be made in the field are achieved by simply connecting standard prefabricated connectors.

[0040] FIG. 4 is another top view 400 of the EV stands 212 and 220 as arranged in FIG. 2. In this view 400, the power source 202 again provides power to the EV stands 212 and 220 by way of the cable segment 208 and cable segment 216, but the branch devices 210 and 218 are not shown because they are located below the bottom of the recesses 302 and 304. As discussed in more detail below, the branch devices 210 and 218 are each respectively connected between the cable segments 208 and 216 and at least three connection interfaces 308 (e.g., a positive connection interface, a negative connection interface, and a ground connection interface) located on the sides of the recesses 302 and 304.

[0041] In this configuration, the sides of the recesses 302 and 304, each have three connection interfaces 308 that are configured to engage with corresponding connection interfaces located on the sides of an EV charger (e.g., in a lower 1 / 3 portion of the charging station). For example, when the connection interfaces 308 are exposed tension conductors (e.g., similar to direct current battery connections), they are configured to interface (e.g., engage) with corresponding exposed conductors on the sides of the EV chargers, thereby providing an electrical connection to the power source 202 in a “plug and play” manner, and the tension of the connection interfaces 308 on the corresponding exposed conductors on the sides of the EV chargers can help stabilize the EV chargers in the recesses 302 and 304.

[0042] FIG. 5 is a side view 500 of the EV stand 212 and the curb structures 214 and 224. In this view 500, the EV stand 212 has the three connection interfaces 308 that are located on the interior side walls 502 of the recess 302. In this configuration, the connection interfaces 308 are formed to be partially located within the interior side walls of the recess 302. To facilitate the connection with the corresponding connection interfaces of an EV charger, the connection interfaces 308 can be flexible so that they will engage the corresponding connections interfaces of the EV charger, and flex (e.g., be pressed back) toward the interior side walls 502. This flexion causes the connection interfaces 308 to place pressure on the sides of the EV charger, helping secure the EV charger within the EV stand, and ensuring a reliable electrical connection between the connection interfaces 308 and the corresponding connection interfaces of the EV charger.

[0043] In FIG. 5, the branch device 210 is located in the bottom of the EV stand 212 (e.g., underneath the bottom of the recess 302) and connected to the connection interfaces 308 with three conductors (e.g., patch wires) 504, 506, and 508 (e.g., one positive conductor, one negative conductor, and one ground conductor). Although three separate conductors are shown, a connectorized wire harness assembly (e g., a wiring assembly having multiple conductors connected to a connection interface at the end of the conductors) can be used to make the connection between the branch device 210 and the connection interfaces 308. For example, the conductors 504, 506, and 508 can be manufactured to feed into a connector that is configured to interface with a connectorized wire harness assembly. The connectorized wire harness assembly can be configured to provide a connection between the branch device 210 and the connector at the end of the conductors 504, 506, and 508. This would eliminate the need for any individual wire connections to be made in the field, for example, by enabling the installer to simply connect the connector at the end of the conductors 504, 506, and 508 to the branch device 212, or another wire harness assembly having connectors configured to interface with a connector of the branch device 212 and the connector at the end of the conductors 504, 506, and 508. Note that three conductors are discussed throughout this specification for purposes of illustration, but other numbers / configurations of conductors can be supported in a similar manner.

[0044] Alternatively, or additionally, the branch device 210 can be pre-connected to the connection interfaces 308 during manufacturing of the EV stand 212, such that the only electrical connections that would need to be made during installation would be the connections between the branch device 210 and the connectors 510 and 512 that terminate the cable segments 208 and 216. The connectors 510 and 512 are configured to interface with (e.g., connect to) the branch device 212, such that the connections between branch device 210 and the cable segments 208 and 216 are completed by simply plugging the connectors 510 and 512 into the branch device 212. The connectors 510 and 512 can be any appropriate connectors, such as those used to interface to an EV or other connectors configured to operate at sufficient voltage and current levels for the intended charging level. In some implementations, depending on the geography and the charging level supported, the connectors 510 and 512 can be selected from among the following types of connectors:1 . JI 772 Connector: This is a Level 2 charging connector that is used in North America, and it provides up to 240V of power. It features a standard five-pin configuration and is compatible with most EVs on the market.2. CCS Connector: This is a Combined Charging System connector that can support both Level 2 and DC fast charging. It features a two-pin DC charging connector that is located below the Level 2 charging connector. The CCS connector is commonly used in North America, Europe, and Asia.3. CHAdeMO Connector: This is a Level 3 DC fast charging connector that is primarily used in Japan and Europe. It features a unique design that includes a large, circular connector with two small pins at the bottom.4. Tesla Connector: This is a proprietary charging connector used exclusively by Tesla vehicles. It supports Level 2 and Level 3 DC fast charging and features a unique six-pin configuration.5. Type 2 Connector: This is a European standard charging connector that supports both Level 2 and DC fast charging. It features a seven-pin configuration and is commonly used in Europe.6. GB / T Connector: This is a Chinese national standard charging connector that supports both Level 2 and DC fast charging. It features a nine-pin configuration and is commonly used in China.

[0045] Any of the connectors discussed throughout this document could be implemented using one of these types of connectors, or other appropriate connectors (e.g., rated for the intended voltage and current levels).

[0046] FIG. 6 is an illustration of the EV charger 204 being inserted into the recess 302 of the EV stand 212. As shown, the recess 302 has dimensions that enable the recess 302 to receive the bottom section 602 of the EV charger 204. For example, the dimensions of the recess 302 can be slightly larger than the perimeter defined by the sides of the EV charger 204.

[0047] The bottom section 602 of the EV charger 204 has three connection interfaces 604a, 604b, and 604c that are located on the sides of the bottom section 602 of the EV charger 204. The connection interfaces 604a, 604b, and 604c are arranged at locations that cause the connection interfaces 604a, 604b, and 604c to engage with the connection interfaces 308a, 308b, and 308c of the EV stand 212. For clarity, the connection interfaces 604a, 604b, and604c can be referred to as charger connection interfaces, and the connection interfaces 308a, 308b, and 308c can be referred to as stand connection interfaces. As the EV charger 204 is inserted into the recess 302 of the EV stand 212, the locations of the charger connection interfaces 604a, 604b, and 604c cause them to align with the locations of the stand connection interfaces 308a, 308b, and 308c, respectively. As the EV charger 204 is inserted further into the EV stand 212, the charger connection interfaces 604a, 604b, and 604c engage the stand connection interfaces 308a, 308b, and 308c, respectively, thereby creating an electrical connection between the EV charger 204 and the EV stand 212.

[0048] In the current illustration, the stand connection interfaces 308a, 308b, and 308c are shown as being arranged slightly inside the perimeter of the recess 302, so that when charger connection interfaces 604a, 604b, and 604c engage the stand connection interfaces 308a, 308b, and 308c, the stand connection interfaces 308a, 308b, and 308c will be depressed, thereby creating an opposing force to maintain a reliable connection between the stand connection interfaces 308a, 308b, and 308c and the charger connection interfaces 604a, 604b, and 604c.

[0049] The configuration could be switched such that the charger connection interfaces 604a, 604b, and 604c are manufactured to be arranged such that they rest at locations slightly outside the perimeter of the EV charger 204. In this configuration, the charger connection interfaces 604a, 604b, and 604c are slightly depressed (e.g., toward a center of the EV charger 204 when they are inserted into the recess 302 and / or engage with the stand connection interfaces 308a, 308b, and 308c, which again will result in an opposite force that helps facilitate a reliable connection between the stand connection interfaces 308a, 308b, and 308c and the charger connection interfaces 604a, 604b, and 604c.

[0050] In some implementations, the charger connection interfaces 604a, 604b, and 604c can be added to a pre-manufactured (e.g., legacy) charging station that was not manufactured with the charger connection interfaces 604a, 604b, and 604c. For example, as represented by the line 606, the bottom section 602 of the EV charger 204 can be a sleeve (e.g., removeable sleeve) or appendage (e.g., additional segment) that includes the charger connection interfaces 604a, 604b, and 604c, and slides over the bottom of an already manufactured EV charger 204. In these situations, electrical connections between the charger connection interfaces 604a, 604b, and 604c located on the sleeve and the EV charger 204 can be made ata manufacturing facility, factory, or other centralized location so that when the EV charger 204 arrives at an installation location, no individual wiring connections need to be made, thereby facilitating the “plug and play” installation described throughout this specification. This also facilitates the ability to test the connections (physical and electrical) between the charger connection interfaces 604a, 604b, and 604c on the sleeve to the EV charger 204 at a centralized location that may have more sophisticated testing equipment than is practical to use at the installation location.

[0051] FIG. 7 is a side view 700 of an EV charger 702 being retrofitted with a connection sleeve 704. The EV charger 702 is similar to the EV charger 204 discussed throughout, but was manufactured without the charger connection interfaces 604a, 604b, and 604c discussed above with reference to FIG. 6. As shown, the connection sleeve 704 includes sleeve connection interfaces 706a, 706b, and 706c, which are similar to the charger connection interfaces 604a, 604b, and 604c, but manufactured on the sleeve 704, rather than the EV charger 702. Note that the sleeve 704 is described as fitting over the bottom of the EV charger, but the sleeve 704 can be configured to attach to the bottom of the EV charger 702.

[0052] Before the connection sleeve 704 is placed over (or attached to) the bottom of the EV charger 702, the sleeve connection interfaces 706a, 706b, and 706c can be connected to power terminals 708a, 708b, and 708c of the EV charger 702 by way of three conductors (e g., wires or cables) 710a, 710b, and 710c. The current view 700 shows individual connections between the sleeve connection interfaces 706a, 706b, and 706c and the power terminals 708a, 708b, and 708c, respectively, but the connections could be made using connectors similar to those discussed throughout this specification.

[0053] For example, the EV charger 702 can be manufactured to include a wire harness connector (e.g., 712a) that is connected to the power terminals 708a, 708b, and 708c, or with a wire harness connector being the sole interface to the power terminals 708a, 708b, and 708c. Similarly, the connection sleeve 704 can be manufactured to have a corresponding wire harness connector (e g., 712b) as the electrical interface to the sleeve connection interfaces 706a, 706b, and 706c, such that the electrical connection between the EV charger 702 and the connection sleeve 704 can be made by simply joining the wire harness connector of the sleeve connection interfaces 706a, 706b, and 706c with the wire harness connector ofthe power terminals 708a, 708b, and 708c. In this way, the addition of the connection sleeve 704 to the EV charger 702 can be completed in a “plug and play” manner.

[0054] The boxes 712a and 712b represent the optional connectors that can be used to electrically connect the connection sleeve 704 and the EV charger 702. The connector represented by the box 712a, which provides a connector interface to the power terminals 708a, 708b, and 708c, can be located, for example, within or on an outer surface of the EV charger 702 (e.g., at the location of the power terminals 708a, 708b, and 708c). Similarly, the connector represented by the box 712b, which provides a connector interface to the sleeve connection interfaces 706a, 706b, and 706c can be located within, or on an outer surface of, the connection sleeve 704. A cable assembly having the appropriate wire harness connectors on each end can be used to electrically connect the connectors represented by the boxes 712 and 712b.

[0055] To join the EV charger 702 and connection sleeve 704, the bottom of the EV charger 702 can be inserted into the connection sleeve 704, or the connection sleeve 704 can be attached to the bottom of the EV charger 702. When the connection sleeve 704 is installed by inserting the EV charger into the connection sleeve 704, it will cover a bottom section of the EV charger 702, as illustrated by the dashed line 714. Once installed, the connection sleeve 704 configures the EV charger 702 to interface (electrically and / or physically) with an EV stand, as previously discussed.

[0056] The connection sleeve 704 can be configured with different electrical connection interfaces, which enables any EV charger to be compatible with the EV stands discussed throughout this specification, as well as other types of EV stands. For example, instead of using the contact-type connections for the sleeve connection interfaces 706a, 706b, and 706c shown in FIG. 7, the sleeve connection interfaces 706a, 706b, and 706c can be configured to interface with the corresponding connection interfaces of any EV stand. In this way, EV chargers from various manufacturers can be modified, i.e., using a connection sleeve 704, to interface with an EV stand supplied by any manufacturer. As such, the connection sleeve 704 can provide a universal interface between EV chargers 702 and EV stands.

[0057] To illustrate, the sleeve connection interfaces 706a, 706b, and 706c of the connection sleeve 704 can be configured to interface with (e.g., engage or connect to) the three connection interfaces 306 (e g., the three white circles) shown in FIG. 3. In this example,each of the sleeve connection interfaces 706a, 706b, and 706c can be configured to interface with a corresponding one of the connection interfaces 306 located at the bottom of the recesses 302 and 304. For example, when the connection interfaces 306 are connector receptacles (e.g., female connector interfaces), the sleeve connection interfaces 706a, 706b, and 706c can be configured as male connection interfaces corresponding to (e.g., having a similar shape / size, location, and / or orientation) the female connector receptacles of the connection interfaces 306. Similarly, when the connection interfaces 306 are male connector interfaces, the sleeve connection interfaces 706a, 706b, and 706c can be configured as female connection interfaces corresponding to (e.g., having a similar shape / size, location, and / or orientation) the male connector receptacles of the connection interfaces 306. The sleeve connection interfaces 706a, 706b, and 706c can be formed in any appropriate size, shape, location, and / or orientation to interface with the corresponding connection interfaces of EV stands.

[0058] In addition to being configured to interface with various electromechanical connection interfaces, the connection sleeve 704 can have various external shapes and / or sizes to be compatible with EV stands having recesses of various shapes or sizes.

[0059] FIG. 8 is a side view 800 of an EV charger 804 interfacing with a connection sleeve 802. As shown in FIG. 8, the connection sleeve 802 is still configured to receive an EV charger 804 into the connection sleeve 802 (e.g., slide over a bottom of the EV charger 804), but the bottom of the connection sleeve 802 has an additional lower segment 806 below the portion of the connection sleeve 802 (e.g., rectangular portion) that is configured to receive the EV charger 804.

[0060] This lower section 806 is shown as a cylinder with a cone bottom end, but could take on any shape. This lower section 806 can be configured to interface with an EV stand having a recess of the same, or similar shape. For example, assume that at least the bottom of the recess of the EV stand in which the EV charger 804 is to be connected has the shape of the lower section 806. In this example, securing the connection sleeve 802 to the bottom of the EV charger 804 enables the EV charger 804 to interface (e.g., be inserted into) the recess of the EV stand, and allows for interoperability between EV chargers and EV stands.

[0061] In addition to having different configurations (e.g., shapes, sizes, etc.) different EV stands can have different connection interface configurations, which can require differentlyconfigured connection sleeves. As illustrated, the sleeve connection interfaces 706a, 706b, and 706c are shown as contact-type electrical interfaces that are configured to engage corresponding contact-type electrical interfaces of an EV stand. In the present example, the connection interface 706a could be a positive lead connection interface, the connection interface 706b could be a negative lead connection interface, and the connection interface 706c could be a ground connection interface. The configuration of these connection interfaces 706a, 706b, and 706c can be selected, for example, based on the locations, sizes, orientations, etc. of the corresponding connection interfaces of the EV stand with which the connection sleeve 802 is designed to interface.

[0062] FIG. 8 also shows an example of the connection sleeve 802 and the EV charger 804 being manufactured to directly engage (e.g., electrically and mechanically) with each other (e.g., without requiring external wiring). In this example, the EV charger 804 is manufactured, or otherwise configured, having three electrical connection terminals 808a, 808b, and 808c in a bottom section (e.g., bottom 1 / 3, 1 / 8 1 / 10, or another lower section) of the EV charger 804. As shown, the electrical connection terminals 808a, 808b, and 808c are located offset from the bottom of the EV charger 804 (e.g., closer to the top of the EV charger 804 than a bottom-most surface of the EV charger 804), but the electrical connection terminals 808a, 808b, and 808c could be formed in the bottom of the EV charger 804, or even extending below the bottom panel of the frame of the EV charger 804. The example configuration of the electrical connection terminals 808a, 808b, and 808c and the bottom of the EV charger 804 creates a “zipper configuration” in which the electrical connection terminals 808a, 808b, and 808c are exposed by voids that are between “teeth” 810a and 810b that physically separate / delineate the electrical connection terminals 808a, 808b, and 808c.

[0063] In this example, the connection sleeve 802 is configured to complement (e.g., receive) the configuration of the electrical connection terminals 808a, 808b, and 808c and the bottom structure of the EV charger 804. For example, the bottom of the portion of the connection sleeve 802 that is configured to receive the EV charger 802 has corresponding electrical connection terminals 812a, 812b, and 812c that are arranged at locations of the connection sleeve 802 that are aligned with the electrical connection terminals 808a, 808b, and 808c when the EV charger 804 is inserted into the connection sleeve 802. For clarity the electrical connection terminals 808a, 808b, and 808c are referred to as charger connection terminals,and the electrical connection terminals 812a, 812b, and 812c are referred to as sleeve connection terminals.

[0064] As shown, the sleeve connection terminals 812a, 812b, and 812c are formed on a top surface of the bottom of the portion of the connection sleeve 802 that is configured to receive the EV charger 802. This configuration results in voids being defined between the sleeve electrical terminals 812a, 812b, and 812c. The locations of the sleeve electrical terminals 812a, 812b, and 812c and the voids defined between them are complementary to the zipper configuration of the EV charger 804, such that the teeth 810a and 810b of the EV charger 804 align with the voids defined by the sleeve electrical terminals 812a, 812b, and 812c. Meanwhile, the charger connection terminals 808a, 808b, and 808c engage (e.g., electrically connect to and physically contact) the sleeve electrical terminals 812a, 812b, and 812c when the EV charger 804 is inserted (e g., fully inserted) into the connection sleeve 802.

[0065] FIG. 9A is a side view 900 of an EV stand 902 having a branch device 904 installed. As shown, the branch device 904 is arranged (e.g., connected, installed, or otherwise located) at the bottom of a recess 906 formed in the EV stand 902. If the EV stand 902 did not have the recess 906, the branch device 904 could be located at the top surface of the EV stand 902.

[0066] In the present configuration, the top of the branch device 904 is adjacent to, or flush with, the bottom of the recess 906, such that the top of the branch device 904 can be accessed through the recess 906. The top of the branch device 904 can be a surface of the branch device 904 that has connection interfaces formed therein, as discussed above with reference to FIG. 3. For example, the top of the branch device 904 can have a male or female connector interface with which a corresponding connection interface of an EV charger is configured to engage (e.g., physically and electrically connect). In this configuration, no additional wire harnesses are required to be connected between the branch device 904 and the EV charger that is inserted into the EV stand 902. As previously discussed, the branch device 904 can be configured to connect to multiple different wire harness connectors, such that power from a single power trunk line can be distributed to multiple different EV chargers. For example, as shown, the branch device is shown connected to two wire harness connectors 908 and 910, which are termination points for two cable segments 912 and 914, respectively. Furthermore, as discussed above, the top of the branch device 904 is configured to interfacewith a connector of an EV charger that is installed on / in the EV stand 902, thereby enabling the branch device 904 to provide power to the EV charger.

[0067] FIG. 9B is a top view 950 of the EV stand 902. In this view 950, the top of the branch device 904 is visible at the bottom of the recess 908. As shown, the top of the branch device 904 includes a connection interface (e.g., depicted by the black ellipses) that is configured to interface with a corresponding connector of an EV charger, as discussed throughout this specification. For example, when the EV charger is inserted into the recess 906, conductors in the EV charger connector can align with, and be inserted into, ports of the connection interface defined in the top of the branch device 904. In this way, a direct connection between the EV charger and the branch device 904 can be made, thereby facilitating a “plug and play” installation of the EV charger into the EV stand 902. As discussed above, the EV stand may be configured without the recess 906, such that the EV charger would be installed on top of the EV stand 902, rather than being inserted into the EV stand 902. In these situations, the branch device 904 can be located at (e.g., accessible from) the top surface of the EV stand 902, and engage with the charger connector in a manner similar to that discussed above.

[0068] FIG. 10 is a side view of an EV stand 1002 installed in combination with an uneven ground 1004 curbing solution. As discussed above, cable segments used to connect between the power source and EV stands / chargers can be embedded in curbing when the curbing is installed. For example, as concrete used to form a curb (e.g., parking block) is being dispensed and / or formed, cable segments can be submerged into the wet concrete, which hides the cable segments, and provides physical protection from environmental conditions that may otherwise damage the cable segments.

[0069] While the curb can be pre-manufactured with the cable segments already embedded into curb segments (e.g., parking blocks), and delivered to the installation site, uneven ground conditions, such as damaged asphalt in a parking lot, may prevent the pre-manufactured curb segments from being used. For example, if elevation changes in the ground at an installation location for the curb segment exceeds a pre-specified amount of elevation change, the premanufactured curb segments may crack, break, or otherwise be structurally compromised, which can lead to a dangerous situation, particularly when cable segments, which are potentially carrying high power levels, are embedded into the curb segments.

[0070] To reduce the likelihood of curb segments, particularly those having cable segments embedded therein, becoming structurally compromised (or damaged in transit), the curb segments can be formed onsite, such that the base of the curb segment will follow the contours of the ground (or other supporting structured) on which the curb segments are being formed. Meanwhile, the top of the curb segment can be uniformly shaped (e g., to be smooth and / or flat), and the cable segment inserted into the wet concrete can be inserted in a uniform manner (e.g., without significant differences in the depth of the cable segment below a top of the curb segment). For purposes of this document, significant differences in the depth can be considered to exist, for example, when cable flexion angles caused by the differences in depths exceed ratings of the cable being used.

[0071] FIG. 10 illustrates the installation of the EV stand 1102 and curb segment 1006 on uneven ground 1004 (or other supporting structure). As shown, the top of the curb segment 1006 is generally flat and smooth, while the bottom of the curb segment 1006 follows the contours of the uneven ground 1004. FIG. 10 also shows a cable segment 1008 that is embedded in the curb segment 1006. As shown, the distance of the cable segment 1008 from the top of the curb section remains relatively constant until a point (designated by dashed line 1010) at which the cable segment 1008 is directed to the top of the curb segment 1006.

[0072] As shown, the cable segment 1008 can be embedded into a portion of the curb segment 1006, and then surfaced to be exposed at certain intervals. For example, the end of the cable segment 1008 can have a connector 1012 connected at an end of the cable segment 1008. In this example, the cable segment 1008 can be installed within the curb segment 1006 in a manner that enables the connector 1012 to be accessible. More specifically, the cable segment 1008 can be embedded in the curb segment 1006 in a manner that the connector 1012 is available for connection to a branch device 1014 that is located within (or under) the EV stand 1002. By surfacing the cable segment 1008 to make the connector 1012 accessible, as shown, the cable segment 1008 can be connected to the branch device 1014, thereby facilitating power delivery to an EV charger, as discussed throughout this specification.

[0073] Once the cable segment 1008 has been arranged so that the connector 1012 (or an end of the cable segment to which the connector 1012 is later attached) is exposed above the curb segment 1006, the formation of the curbing can continue, and another cable segment 1016 can be embedded in additional portions of curbing that are formed, in a similar manner. Forexample, an end of the cable segment 1016 can also have a connector 1018 attached thereto. To facilitate connection of the connector 1018 to the branch device 1014, the cable segment 1016 can initial be exposed (e.g., arranged above of the top of the curb being formed), and as the curbing continues to be formed the cable segment 1016 can be submerged into the concrete (or other material being used to form the curb) in a manner similar to that discussed above.

[0074] In some implementations, the EV stand 1002 can be affixed to the concrete being used to form the curbing. For example, the concrete used to form the portion of the curb segment 1006 that is to the left of the EV stand 1002 can be more narrow than the concrete that is located under the EV stand 1002, such that the area of concrete under the EV stand 1002 is wide enough to support the EV stand 1002. In these implementations, ground anchors 1020, which can be similar to the ground anchors 228 previously discussed, can be embedded in the wet concrete and used to secure the EV stand 1002 once the concrete has cured. This configuration can provide a flatter area for installation of the EV stand 1002.

[0075] FIG. 11 is a side view 1100 of another example installation of an EV stand 1102 and curb segments 1104 and 1106 on uneven ground 1108. The configuration of components in the view 1100 is similar to that of the view 1000, but the EV stand 1102 is installed between two distinct curb segments 1104 and 1106, instead of being installed on a continuous concrete surface. As shown, the EV stand 1102 is installed into the ground 1108 (or other supporting structure) using the ground anchors 1020 (discussed above), while the curb segments 1104 and 1106 end at the dashed lines 1108 and 1110, which are on opposite sides of the installation location of the EV stand 1102.

[0076] Installing the EV stand 1102 in this manner can reduce, or eliminate, the need for the cable segments 1112 and 1114 to be routed to the top of the curb segments 1104 and 1106, as discussed above with reference to FIG. 10. For example, in this configuration, the level (e.g., elevation) of the EV stand 1102 can be selected / set so that the cable segments 1112 and 1114 can exit the ends of the curb segments 1104 and 1106 at the side ends (e.g., side walls) adjacent to the installation location of the EV stand 1102. As such, the curvature of the cable segments 1112 and 1114 are reduced, and the installation complexity is reduced. For example, in order to expose the cable segment 1112 during the formation of the curb segment 1104, the installer can stop dispensing the concrete from the curb installation machine (e.g.,at the location of the dashed line 1108), such that as the curb installation machine continues to traverse (e.g., left to right), additional portions of the cable segment 1112 and the connector 1116 will be exposed (e.g., not embedded or covered in concrete of the curb segment 1104).

[0077] Similarly, the connector 1118 and a portion of the cable segment 1114 can be dispensed, or otherwise laid in the area occupied by the EV stand 1102 in FIG. 11, while the curb installation machine is not dispensing concrete. This leaves the connector 1118 and a portion of the cable segment 1114 not covered with curb material (e.g., concrete). When the dispenser of the curb installation machine reaches the location of the dashed line 1110, concrete can again be dispensed as the curb installation machine traverses to the right, and portions of the cable segment 1114 to the right of the dashed line 1110 can be embedded into the curb segment 1106 as it is formed. When installation of the curb segments 1104 / 1106 and cable segments 1112 / 1114 are complete (e.g., when the concrete cures), the EV stand 1102 can be installed into the gap / void between the curb segments 1104 / 1106, and the connectors 1116 and 1118 can be connected to the branch device 1120, as discussed throughout this specification. In some implementation, the curb installation machine can include a cable dispensing apparatus that dispenses the cable segments and maintains their position as the concrete is dispensed and formed into the curb segments.

[0078] While a curb installation machine is referred to, the curbing could be installed manually, for example, with forms that are filled with concrete. In these situations, the cable segments can be inserted into holding mechanisms attached to the sides of the forms. The holding mechanisms can be configured to maintain tension on the cable segments as the concrete (or other curbing material) is dispensed into the form, which maintains the position of the cable segments until the concrete cures.

[0079] FIG. 12 is a flow chart of an example process 1200 for creating an EV charging system. The process 1200 can include one or more of the operations discussed below, and the operations can be performed in a different order than presented below. Additionally, while the process 1200 describes multiple curb segments and multiple cable segments, operations of the process 1200 can be used to implement an EV charging system having only a single curb segment and a single cable segment.

[0080] Form curb segments having a cable segments embedded therein (1202). As discussed above, curb segments can be formed by dispensing concrete (or another curbing material) using a curb installation machine. The curb installation machine generally includes a hopper where the concrete is mixed, a mold that is used to shape the curb, and a vibrator that is used to compact and strengthen the concrete. The concrete is dispensed from the hopper, formed using the mold, and compacted using the vibrator. In some implementations, the concrete installation machine also includes a cable guide, which is configured to dispense and support cable segments in a pre-set location relative to the top of the curb segment being formed. In this way, the curb installation machine can maintain a desired position of the cable segments while the curbing is formed around the cable segments.

[0081] As discussed above, ends of each cable segment can be exposed for connection to an EV stand or another component. For example, the ends of the cable segments, which can have connectors attached thereto, can emerge from the sides of the formed curb segments. In some implementations, the cable segment can be embedded in the curb segments such that the ends of the cable segments, and / or connectors, emerge from the top of the curb segments.

[0082] Install an EV stand between two curb segments (1204). The EV stand can be installed, for example, as shown in FIG. 11, which enables the sides of the EV stand to be accessible form the sides of the formed curb segments.

[0083] Connect the EV stand to a cable segment embedded in one of the curb segments (1206). The connection of the EV stand to the cable segment can either be a direct connection, or the connection between the EV stand and the cable segment can be facilitated by a branch device, as discussed throughout this specification. For example, connectorized interfaces can be used to provide a “plug and play” connection between the different components.

[0084] Connect a different cable segment embedded in a different curb segment to the EV stand (1208). The connection between the different cable segment and the EV stand can be made using connectorized interfaces, as discussed throughout this specification. For example, the connection of the connector 1118 to the branch device 1120 can constitute a connection between the different cable segment and the EV stand.

[0085] Connect a different EV stand to an opposite end of the different cable segment (1210). The connection between the different EV stand and the opposite end of the different cable segment can be performed for example, using connectorized interfaces, as discussedthroughout this specification. For example, the connection of the cable segment 216 to the branch device 218 is an example of a connection between the opposite end of the different cable segment and the different EV stand (e.g., by way of the branch device 218).

[0086] Connect one of the cable segment or the different cable segment to a power source (1212). An example of connecting one of the cable segments to the power source is illustrated by the connection of the cable segment 208 to the power source 202, as shown in FIG. 2. In this example, the cable segment 208 connects the power source 202 to the EV stand 212 to provide power to the EV charger 204

[0087] While this specification contains many specific implementation details, these should not be construed as limitations on the scope of any inventions or of what may be claimed, but rather as descriptions of features specific to particular embodiments of particular inventions. Certain features that are described in this specification in the context of separate embodiments can also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment can also be implemented in multiple embodiments separately or in any suitable subcombination. Moreover, although features may be described above as acting in certain combinations and even initially claimed as such, one or more features from a claimed combination can in some cases be excised from the combination, and the claimed combination may be directed to a subcombination or variation of a subcombination.

[0088] Similarly, while operations are depicted in the drawings in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order, or that all illustrated operations be performed, to achieve desirable results.

[0089] Thus, particular embodiments of the subject matter have been described. Other embodiments are within the scope of the following claims. In some cases, the actions recited in the claims can be performed in a different order and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In certain implementations, multitasking and parallel processing may be advantageous.What is claimed is:

Claims

CLAIMS1. An electric vehicle (“EV”) charging system, comprising: a charging stand configured to be secured to a base surface, the charging stand including: two electrical interfaces configured to electrically connect the charging stand to (i) a power source and (ii) an additional charging stand; and a charger interface configured to removably connect, physically and electrically, to an EV charger.

2. The EV charging system of claim 1, wherein the charger interface comprises a branch device configured to electrically connect the charger interface to the two electrical interfaces.

3. The EV charging system of claim 2, wherein the branch device is a connectorized device configured to electrically connect the two electrical interfaces with connectors that terminate two power cables.

4. The EV charging system of claim 1, wherein the charger interface comprises a recess in a top of the charging stand, wherein the recess is configured to receive a bottom of the EV charger within side walls of the charging stand.

5. The EV charging system of claim 4, wherein the charger interface includes conductive contacts located on interior side walls of the recess or a bottom of the recess, wherein the conduct contacts are configured to provide an electrical connection between the EV charger and the charging stand.

6. The EV charging system of claim 1, further comprising a curb segment having a cable segment embedded therein.

7. The EV charging system of claim 6, wherein a connector at an end of the cable segment is exposed from the curb segment and is configured to connect to one of the two electrical interfaces.

8. A method comprising: forming a curb segment having cable segments embedded therein; installing an EV stand between two curb segments; connecting the EV stand to a cable segment embedded in one of the curb segments; connecting a different cable segment embedded in a different curb segment to the EV stand; connecting a different EV stand to an opposite end of the different cable segment; and connecting one of the cable segment or the different cable segment to a power source.

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