Distributed energy storage system power distribution busbar cabinet

Abstract

This invention relates to the field of power distribution combiner cabinet technology and discloses a power distribution combiner cabinet for a distributed energy storage system, including an energy storage cabinet. The bottom of the energy storage cabinet is fixedly connected to the combiner cabinet. Clamping and fixing components are respectively installed on both sides of the inner wall of the combiner cabinet. A control module is installed at the bottom of the clamping and fixing components. The top of the support plate is used to place the energy storage module. Multiple circuit board modules are fixedly installed on the inner wall of the combiner cabinet. The top of the line channel is provided with a storage tank for storing lines and connectors. This invention controls the push plate motor and the telescopic transmission component through a switch to realize the clamping, releasing, automatic centering and precise docking of the energy storage module with the circuit board module, improving operating efficiency and connection stability. At the same time, through temperature detection and fire extinguishing of the storage tank, the telescopic baffle is triggered to retract when the cable catches fire, so that fire extinguishing rock powder is quickly poured into the line channel and wrapped around the cable to achieve flame retardancy.

Description

Technical Field

[0001] This invention relates to the field of power distribution combiner cabinet technology, and more specifically to a power distribution combiner cabinet for a distributed energy storage system. Background Technology

[0002] The distribution combiner cabinet of a distributed energy storage system is the core power distribution hub equipment of the distributed energy storage system. It is mainly used to centrally combine and distribute power from multiple battery energy storage modules. It integrates circuit breakers, fuses, lightning protection, insulation monitoring, measurement and control and communication modules to realize power collection, electrical protection, operation parameter monitoring and remote linkage control, and ensure the safe, stable and efficient operation of the energy storage system. It is a key electrical device connecting battery clusters with energy storage converters and the power grid. The safety protection of existing patented combiner cabinets is limited to basic shell protection and lacks targeted circuit hazard monitoring and fire emergency response measures. When an electrical fire occurs, there is no rapid and effective emergency response mechanism, which cannot stop the spread of the fire in time, which can easily lead to the fire spreading and damaging the entire combiner cabinet and surrounding equipment. This poses a serious safety risk and cannot meet the high standard of safety protection requirements in distributed energy storage scenarios. In addition, the energy storage modules in existing patented combiner cabinets require multiple independent cables for connection. The excessive number of cables can lead to messy wiring, making it easy to accidentally touch the cables during the inspection or maintenance of the energy storage modules, causing power outages or safety accidents. At the same time, the fixed structure design of the energy storage modules is simple and lacks precise positioning and linkage fixing mechanisms, which can easily lead to loose contact and positioning deviation between the energy storage modules and the circuit connection components, thereby affecting the stability of power collection and the accuracy of data transmission. Summary of the Invention

[0003] In order to overcome the above-mentioned defects of the prior art, the present invention provides a distributed energy storage system power distribution combiner cabinet to solve the problems existing in the background art.

[0004] This invention provides the following technical solution: a distributed energy storage system power distribution combiner cabinet, including an energy storage cabinet body, a combiner cabinet body fixedly connected to the bottom of the energy storage cabinet body, a protective cabinet door movably connected to the outside of the combiner cabinet body, clamping and fixing components installed on both sides of the inner wall of the combiner cabinet body, a control module installed at the bottom of the clamping and fixing components, a sliding groove opened on the outer wall of the control module, a bearing plate installed in the sliding groove, the top of the bearing plate being used to place the energy storage module, multiple circuit board modules fixedly installed on the inner wall of the combiner cabinet body, one side of the circuit board module being able to engage with the energy storage module to achieve electrical connection, the other side of the circuit board module being provided with a line channel, and the top of the line channel being provided with a storage trough for storing lines and connectors.

[0005] Furthermore, a control panel is installed on the outside of the energy storage cabinet, a storage trough is opened on the top of the energy storage cabinet, a telescopic baffle for protection is installed on the top of the storage trough, and a sealing protective component is installed at the connection between the storage trough and the line channel to ensure the sealing of the connection.

[0006] Furthermore, the circuit board module is externally connected to a series circuit, a parallel circuit, and a power supply circuit. The series circuit is used to connect multiple circuit board modules in series, the parallel circuit is used to connect multiple circuit board modules in parallel, and the power supply circuit is used to connect the circuit board module and the control module.

[0007] Furthermore, a heat dissipation device is installed on the top inner wall of the junction cabinet, and a temperature detection element for monitoring the internal temperature of the cabinet is installed on the side of the heat dissipation device. A cold air fan box is fixedly installed on the side of the junction cabinet, and the pipes of the cold air fan box are connected to the heat dissipation device to achieve heat dissipation inside the cabinet.

[0008] Furthermore, the clamping and fixing assembly includes a telescopic transmission component, a hydraulic chamber, an electric telescopic component, and a drive motor. One end of the hydraulic chamber is fitted with the telescopic transmission component, and the other end of the hydraulic chamber is fitted with the electric telescopic component. The bottom of the hydraulic chamber is fixedly connected to the drive motor to provide power to the clamping and fixing assembly.

[0009] Furthermore, a first piston and a second piston are fitted inside the hydraulic cavity. The first piston is rotatably connected to the telescopic transmission component, and the second piston is welded and fixed to the telescopic rod of the electric telescopic component to realize power transmission.

[0010] Furthermore, one section of the telescopic transmission component is a gear structure, which meshes with the gear shaft of the drive motor to realize the power transmission between the drive motor and the telescopic transmission component.

[0011] Furthermore, the control module includes a control switch, a second circuit, and a push plate motor. One end of the power supply circuit is connected to the circuit board module, and the other end of the power supply circuit is connected to the control switch. The bottom of the control switch is connected to the second circuit, which is connected to the push plate motor, the electric telescopic component, and the drive motor, respectively, for overall control of the operation of each component.

[0012] Furthermore, a handle is welded to the outside of the support plate, and a storage groove is formed on one end surface of the support plate. A spring is installed inside the storage groove, and a limit stop is fixedly connected to the top of the spring to limit the sliding stroke of the support plate.

[0013] Furthermore, an electrical connection plug is installed on the connection surface between the energy storage module and the circuit board module to realize the electrical connection between the two. Conductive copper plates are installed on both sides of the energy storage module. The conductive copper plates are nested with slots on the surface of the circuit board module, and the conductive copper plates are nested in the mating grooves opened in the circuit board module.

[0014] The technical effects and advantages of this invention are as follows: 1. This invention controls the clamping and loosening of the energy storage module by controlling the push plate motor and the telescopic transmission component through a control switch, thereby facilitating the operator to quickly connect the energy storage module to the circuit board module, achieving automatic centering of the energy storage module and precise fit with the circuit board module. This improves operational efficiency and significantly enhances the connection stability of power convergence and data transmission.

[0015] 2. This invention employs a dual protection system of temperature detection elements in the combiner cabinet and fire extinguishing in the storage tank. When an electrical fire occurs in the connecting cable of the energy storage module, the telescopic baffle will quickly retract, allowing the fire extinguishing rock powder stored inside the storage tank to be rapidly poured into the line channel. The fire extinguishing rock powder wraps all the cables, achieving a flame-retardant effect and significantly improving the comprehensiveness and timeliness of safety protection.

[0016] 3. This invention addresses the pain points of existing combiner cabinets, such as scattered circuit connections and poor component control linkage. It optimizes the circuit and control structure of the combiner cabinet by coordinating the circuit board modules with series and parallel circuits, clearly defining the current transmission and data transmission functions of the two. Then, relying on the cooperation of the power supply circuit, control switch, and second circuit, it realizes one-click unified control of all execution components, effectively solving the problems of control delay and asynchronous operation in existing combiner cabinets, and improving the operational stability of the combiner cabinet. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 This is a schematic diagram of the front structure of the power distribution combiner cabinet of the present invention.

[0019] Figure 3 This is a schematic diagram of the junction box structure of the present invention.

[0020] Figure 4 This is a schematic diagram of the energy storage module storage structure of the present invention.

[0021] Figure 5 This is a schematic diagram of the energy storage module structure of the present invention.

[0022] Figure 6 This is a schematic diagram of the circuit board module structure of the present invention.

[0023] Figure 7This is a schematic diagram of the overall rear structure of the present invention.

[0024] Figure 8 This is a schematic diagram of the support plate structure of the present invention.

[0025] Figure 9 This is a schematic diagram of the clamping and fixing component and control module of the present invention.

[0026] Figure 10 This is a schematic diagram of the internal structure of the clamping and fixing component and the control module of the present invention.

[0027] Figure 11 This is a schematic diagram of the internal structure of the hydraulic cavity tube of the present invention.

[0028] The attached diagram is labeled as follows: 1. Energy storage cabinet; 2. Combiner cabinet; 3. Protective cabinet door; 4. Clamping and fixing assembly; 5. Control module; 6. Support plate; 7. Energy storage module; 8. Circuit board module; 9. Wiring channel; 10. Storage tank; 101. Control panel; 102. Telescopic baffle; 103. Sealing and protective component; 201. Series circuit; 202. Parallel circuit; 203. Power supply circuit; 301. Air cooler enclosure; 302. Heat dissipation device; 303, temperature detection element; 401, telescopic transmission component; 402, hydraulic cavity tube; 403, electric telescopic component; 404, drive motor; 411, first piston; 412, second piston; 413, locking block; 501, control switch; 502, second circuit; 503, push plate motor; 601, handle; 602, limit stop; 603, spring; 701, electrical connector; 702, conductive copper plate. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. In addition, the forms of the various structures described in the following embodiments are merely illustrative. The power distribution combiner cabinet involved in the present invention is not limited to the structures described in the following embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Reference Figure 1-11A distributed energy storage system power distribution combiner cabinet includes an energy storage cabinet 1, with a combiner cabinet 2 fixedly connected to the bottom of the energy storage cabinet 1. Multiple energy storage modules 7 installed inside the combiner cabinet 2 can be connected to the energy storage cabinet 1 via circuitry to achieve a power combining effect. A control module 5 installed on the inner wall of the combiner cabinet 2 is slidably connected to a support plate 6. The energy storage modules 7 are placed on the surface of the support plate 6 and clamped by a clamping and fixing component 4, so that the energy storage modules 7 are tightly attached to the circuit board module 8. The wiring channel 9 on the other side of the circuit board module 8 is connected to a storage tank 10. When the connection power of the circuit board module 8 catches fire, the fire extinguishing rock powder stored inside the storage tank 10 can fill the wiring channel 9 to promptly block the spread of the fire and prevent the fire from expanding.

[0031] In a preferred embodiment, the sealing and protective component 103 installed on the top of the storage tank 10 can achieve sealing after adding fire extinguishing rock powder into the storage tank 10. The telescopic baffle 102 installed at the connection between the storage tank 10 and the line channel 9 will retract when the equipment detects a cable short circuit or an electrical fire caused by high temperature, so that the fire extinguishing rock powder inside the storage tank 10 is poured into the line channel 9, effectively preventing the fire from worsening.

[0032] In a preferred embodiment, the circuit board modules 8 inside the combiner cabinet 2 can be connected in multiple groups through series circuit 201 and parallel circuit 202. The series circuit 201 is mainly used for current transmission, and the parallel circuit 202 is used for data transmission, which facilitates the simultaneous control of multiple circuit board modules 8 by the internal system of the energy storage cabinet 1. The two ends of the circuit board modules 8 are electrically connected to the control module 5 through the power supply circuit 203, and the operation of the control module 5 can be controlled by the circuit board inside the circuit board module 8.

[0033] In a preferred embodiment, the temperature detection element 303 can monitor the temperature change inside the junction box 2 in real time. When the temperature is too high, the cold air generated by the air cooler 301 is delivered to the inside of the junction box 2 through the heat dissipation device 302. The surface of the heat dissipation device 302 is covered with a filter screen, which can filter the dust in the air when the heat dissipation device 302 delivers cold air to cool the energy storage module 7, so as to prevent dust from entering the inside of the junction box 2 and affecting the service life of the equipment.

[0034] In a preferred embodiment, the telescopic rod of the electric telescopic component 403 can perform piston movement within the hydraulic chamber 402, thereby pushing the telescopic transmission component 401 to extend outward. When the energy storage module 7 is placed on top of the support plate 6, the telescopic rod of the electric telescopic component 403 retracts, and the telescopic transmission component 401 is stretched into the cabinet through the hydraulic chamber 402. The locking block 413 installed on the outside of the telescopic transmission component 401 can pull the energy storage module 7 inward, making the energy storage module 7 fit more tightly and stably with the circuit board module 8.

[0035] In a preferred embodiment, the telescopic rod of the electric telescopic component 403 is welded to the second piston 412 as a whole. When the electric telescopic component 403 performs telescopic movement, it will drive the first piston 411 to move inward through the hydraulic cavity 402. When the first piston 411 moves towards the second piston 412, it will drive the telescopic transmission component 401, which is slidably connected to it, to move synchronously towards the second piston 412. The telescopic transmission component 401 can rotate freely at the connection of the hydraulic cavity 402 without affecting the movement of the first piston 411.

[0036] In a preferred embodiment, the gear on the telescopic transmission member 401 meshes with the gear of the drive motor 404. The rotation direction of the telescopic transmission member 401 can be controlled by the forward and reverse rotation of the gear of the drive motor 404. When the telescopic transmission member 401 is telescopic, since the length of the gear structure of the telescopic transmission member 401 is greater than the axial length of the gear of the drive motor 404, the meshing gear of the drive motor 404 can translate on the gear structure of the telescopic transmission member 401, and the telescopic transmission member 401 will not affect the gear meshing effect due to its telescopic movement.

[0037] In a preferred embodiment, the power supply circuit 203 can connect the control switch 501 to the circuit board module 8. The control switch 501 is connected to the push plate motor 503, the electric telescopic component 403 and the drive motor 404 respectively through the second circuit 502. The push plate motor 503 is fitted with several ball bearings on the contact surface with the energy storage module 7, which can avoid increasing the resistance of the clamping block 413 in pulling the energy storage module 7 during the clamping process and ensure the smooth movement of the energy storage module 7. When the energy storage module 7 needs to be placed, the control switch 501 is pushed up, the push plate of the push plate motor 503 retracts, the electric telescopic component 403 extends first, pushing the telescopic transmission component 401 to extend towards the cabinet door, and then the telescopic transmission component 401 is rotated by the gear of the drive motor 404, turning the horizontal telescopic transmission component 401 into a vertical one. The locking block 413 installed on the telescopic transmission component 401 also turns from horizontal to vertical at the same time and fits against the inner wall of the junction cabinet 2, which is convenient for placing the energy storage module 7. After the energy storage module 7 is placed, pull down the control switch 501. The push plate motor 503 controls the push plate to extend towards the center of the energy storage module 7, centering the energy storage module 7 on the surface of the support plate 6. Then, the drive motor 404 drives the telescopic transmission component 401 to rotate through the gear, turning the locking block 413 from vertical to horizontal. Finally, the telescopic rod of the electric telescopic component 403 retracts, pulling the telescopic transmission component 401 towards the circuit board module 8. When the telescopic transmission component 401 moves, it pulls the energy storage module 7 towards the circuit board module 8 through the locking block 413, so that the energy storage module 7 and the circuit board module 8 are precisely fitted together.

[0038] In a preferred embodiment, the handle 601 can pull the support plate 6 to extend outwards from the junction box 2, increasing the operating space when placing the energy storage module 7 and facilitating the handling of the energy storage module 7. A spring groove is provided at one end of the support plate 6 near the handle 601. The top of the spring 603 is welded to the limiting stop 602. The limiting stop 602 can prevent the energy storage module 7 placed on the surface of the support plate 6 from falling off. When handling the energy storage module 7, the limiting stop 602 can be pressed down to embed it into the groove, thus preventing the limiting stop 602 from affecting the handling operation of the energy storage module 7.

[0039] In a preferred embodiment, when the energy storage module 7 is attached to the circuit board module 8, the electrical connector 701 is inserted into the slot opened in the circuit board module 8 to realize the current connection between the energy storage module 7 and the circuit board module 8. At the same time, the conductive copper plates 702 at both ends of the energy storage module 7 are nested in the mating grooves of the circuit board module 8. After nesting, the circuit in the nesting groove of the circuit board module 8 is connected through the conductive copper plates 702, so that the circuit board module 8 can monitor the operating data of the energy storage module 7 in real time.

[0040] The working principle of this invention: The core of this distributed energy storage system's power distribution combiner cabinet is to achieve integrated operation of stable placement of energy storage modules, power collection, real-time monitoring, and safety protection through the coordinated linkage of various components. The equipment operation is based on the fixed connection between the energy storage cabinet 1 and the combiner cabinet 2. Multiple energy storage modules 7 in the combiner cabinet 2 are connected to the energy storage cabinet 1 through circuits to achieve power collection. The control module 5 is slidably connected to the support plate 6. The energy storage modules 7 are placed on the support plate 6 and clamped and fixed by the clamping and fixing components 4, so that the energy storage modules 7 are tightly attached to the circuit board module 8, laying a solid foundation for subsequent circuit connection and data transmission. At the same time, the handle 601 can pull the support plate 6 outward, and with the protection of the spring 603 and the limit stop 602, it is convenient to move and place the energy storage modules 7.

[0041] During equipment operation, circuit connections and component control work together to ensure operational stability. Circuit board modules 8 achieve multi-group linkage through series circuit 201 and parallel circuit 202. Series circuit 201 handles current transmission, while parallel circuit 202 handles data transmission, facilitating synchronous control of multiple circuit board modules 8 by the energy storage cabinet 1 system. Power supply circuit 203 connects circuit board modules 8 to the control switch 501 of control module 5. Control switch 501, through a second circuit 502, coordinates the push plate motor 503, electric telescopic component 403, and drive motor 404, enabling precise placement and fixation of energy storage modules 7. Pushing up the control switch 501 allows the telescopic transmission component 401 to rotate and fit against the cabinet wall, facilitating placement. Pulling down the control switch 501, through centering the push plate and component linkage, drives the energy storage module 7 to precisely fit against the circuit board module 8. The piston structure within the hydraulic chamber 402 transmits power, and the gear structure of the telescopic transmission component 401 can move flexibly without affecting the meshing effect.

[0042] During equipment operation, heat dissipation and safety protection are carried out simultaneously to ensure long-term stable operation. Temperature detection element 303 monitors the internal temperature of the junction cabinet 2 in real time. When the temperature is too high, the cold air generated by the air cooler 301 is sent into the cabinet through the heat dissipation device 302 with a filter screen to achieve cooling and filter dust at the same time. The storage tank 10 is connected to the circuit channel 9. The fire extinguishing rock powder stored inside is sealed by the sealing protective component 103. When the circuit board module 8 is connected to the power supply and catches fire, the telescopic baffle 102 retracts, and the fire extinguishing rock powder is filled into the fire location through the circuit channel 9 to block the fire. At the same time, the energy storage module 7 is connected to the circuit board module 8 through the electrical connection plug 701. The conductive copper plate 702 is nested and connected, which facilitates the circuit board module 8 to monitor the operating data of the energy storage module 7 in real time, ensuring the safe and efficient operation of the equipment in all aspects.

[0043] Although the invention has been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these inventions without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

[0044] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change. Secondly: The accompanying drawings of this invention only involve structures related to this invention. Other structures can be referred to with common designs. In the absence of conflict, the same invention and different inventions of this invention can be combined with each other. Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A distributed energy storage system power distribution combiner cabinet, comprising an energy storage cabinet (1), characterized in that: The bottom of the energy storage cabinet (1) is fixedly connected to the combiner cabinet (2), and the outside of the combiner cabinet (2) is movably connected to the protective cabinet door (3). Clamping and fixing components (4) are installed on both sides of the inner wall of the combiner cabinet (2). A control module (5) is installed at the bottom of the clamping and fixing components (4). A sliding groove is opened on the outer wall of the control module (5). A bearing tray (6) is installed in the sliding groove. The top of the bearing tray (6) is used to place the energy storage module (7). Multiple circuit board modules (8) are fixedly installed on the inner wall of the combiner cabinet (2). One side of the circuit board module (8) can mesh with the energy storage module (7) to achieve electrical connection. The other side of the circuit board module (8) is provided with a line channel (9). The top of the line channel (9) is provided with a storage trough (10) for storing lines and connectors.

2. The distributed energy storage system power distribution combiner cabinet according to claim 1, characterized in that: The energy storage cabinet (1) is equipped with a control panel (101) on the outside. The top of the energy storage cabinet (1) is provided with a storage tank (10). The top of the storage tank (10) is equipped with a telescopic baffle (102) for protection. A sealing protective component (103) is installed at the connection between the storage tank (10) and the line channel (9) to ensure the sealing of the connection.

3. The distributed energy storage system power distribution combiner cabinet according to claim 1, characterized in that: The circuit board module (8) is externally connected to a series circuit (201), a parallel circuit (202), and a power supply circuit (203). The series circuit (201) is used to connect multiple circuit board modules (8) in series, the parallel circuit (202) is used to connect multiple circuit board modules (8) in parallel, and the power supply circuit (203) is used to connect the circuit board module (8) to the control module (5).

4. The distributed energy storage system power distribution combiner cabinet according to claim 1, characterized in that: A heat dissipation device (302) is installed on the inner wall of the top of the junction cabinet (2). A temperature detection element (303) for monitoring the internal temperature of the cabinet is installed on the side of the heat dissipation device (302). A cold air box (301) is fixedly installed on the side of the junction cabinet (2). The pipes of the cold air box (301) are connected to the heat dissipation device (302) to realize heat dissipation inside the cabinet.

5. A distributed energy storage system power distribution combiner cabinet according to claim 1, characterized in that: The clamping and fixing assembly (4) includes a telescopic transmission component (401), a hydraulic cavity (402), an electric telescopic component (403), and a drive motor (404). One end of the hydraulic cavity (402) is sleeved with the telescopic transmission component (401), and the other end of the hydraulic cavity (402) is sleeved with the electric telescopic component (403). The bottom of the hydraulic cavity (402) is fixedly connected to the drive motor (404) to provide power to the clamping and fixing assembly (4).

6. A distributed energy storage system power distribution combiner cabinet according to claim 5, characterized in that: The hydraulic chamber (402) is fitted with a first piston (411) and a second piston (412). The first piston (411) is rotatably connected to the telescopic transmission component (401), and the second piston (412) is welded and fixed to the telescopic rod of the electric telescopic component (403) to realize power transmission.

7. A distributed energy storage system power distribution combiner cabinet according to claim 5, characterized in that: One section of the telescopic transmission component (401) is a gear structure, which meshes with the gear shaft of the drive motor (404) to realize the power transmission between the drive motor (404) and the telescopic transmission component (401).

8. A distributed energy storage system power distribution combiner cabinet according to claim 1, characterized in that: The control module (5) includes a control switch (501), a second circuit (502), and a push plate motor (503). One end of the power supply circuit (203) is connected to the circuit board module (8), and the other end of the power supply circuit (203) is connected to the control switch (501). The bottom of the control switch (501) is connected to the second circuit (502). The second circuit (502) is connected to the push plate motor (503), the electric telescopic component (403), and the drive motor (404) respectively, and is used to coordinate the operation of each component.

9. A distributed energy storage system power distribution combiner cabinet according to claim 1, characterized in that: A handle (601) is welded to the outside of the support plate (6). A storage groove is provided on one end surface of the support plate (6). A spring (603) is installed inside the storage groove. A limit stop (602) is fixedly connected to the top of the spring (603) to limit the sliding stroke of the support plate (6).

10. A distributed energy storage system power distribution combiner cabinet according to claim 1, characterized in that: An electrical connector plug (701) is installed on the connection surface between the energy storage module (7) and the circuit board module (8) to realize the electrical connection between the two. Conductive copper plates (702) are installed on both sides of the energy storage module (7). The conductive copper plates (702) and the slots on the surface of the circuit board module (8) are nested in each other, and the conductive copper plates (702) are nested in the mating groove opened in the circuit board module (8).

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