An energy storage system based on a sliding contact line

Abstract

This utility model discloses an energy storage system based on a sliding contact line, including a high-voltage box; a container shell, with several PACKs arranged inside the container shell; guide rails installed inside the container shell, with the PACKs fixed on the guide rails, and a sliding contact line assembly installed above each guide rail; positive and negative current collectors are respectively arranged on both sides of the PACK, and the sliding contact line assembly is connected to the positive and negative current collectors on both sides of the PACK. The PACKs are connected in series laterally to form clusters through the positive and negative connectors of the PACKs and the sliding contact line assembly. The current collectors and the sliding contact line enable quick plugging and unplugging, and the lateral series connection to form clusters solves the wiring problem and avoids the circulating current problem of parallel clusters. This allows for quick plugging and unplugging of the energy storage system PACKs and high-voltage box, simplifies the power lines within and between clusters in the energy storage system, saves wiring space, and improves the system energy density.

Description

Technical Field

[0001] This utility model belongs to the field of energy storage system technology, specifically relating to an energy storage system based on a sliding contact line. Background Technology

[0002] Electrochemical energy storage systems typically provide customers with suitable voltage and capacity through a series and parallel connection of several PACKs (batteries). As a result, there are many cables between PACKs and high-voltage boxes. During installation and maintenance, the power cables need to be repeatedly disassembled and the bolt torque needs to be checked, which greatly affects work efficiency.

[0003] Furthermore, with the increasing application of large-capacity battery cells, the inter-cluster current and intra-pack current levels are becoming increasingly higher. Taking the 587Ah and 680+Ah battery cells currently offered by leading manufacturers as an example, if operating at 0.5P rated power, the intra-cluster current will reach as high as 300-400A. Such a large current necessitates a series and parallel power cable specification of up to 150mm², resulting in insufficient cable turning radius within the limited space (referring to the layer height between adjacent PACKs). Integrators have to increase the size of the battery compartment to provide space for wiring, which in turn reduces the energy density of the entire system. To solve the above problems, most existing technologies use power cables connected in series and parallel to each PACK. Assembly or maintenance requires repeated disassembly and torque verification, leading to excessively long system downtime due to maintenance, severely impacting project profitability. A very small number of manufacturers have adopted a copper busbar back-insertion design, but the presence of the back-insertion busbar causes PACKs to be connected in parallel to form clusters, limiting the system group voltage and resulting in low efficiency. It also leads to intra-cluster circulating current problems. Utility Model Content

[0004] The purpose of this invention is to provide an energy storage system based on a sliding contact line to solve the problems mentioned in the background art, such as the large number of power connection lines in the energy storage system, the increased current in the cluster due to the application of large battery cells, the thickening of power cables, the inability of the PACK layer height to meet the turning radius of the power cables, and the need for repeated disassembly and reassembly of cables during PACK installation and maintenance.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an energy storage system based on a sliding contact line, comprising a high-voltage box; a container shell, within which several PACKs are arranged; guide rails are installed inside the container shell, the PACKs are fixed on the guide rails, and a sliding contact line assembly is also installed above each guide rail; positive and negative current collectors are respectively arranged on both sides of the PACK, and the sliding contact line assembly is connected to the positive and negative current collectors on both sides of the PACK, thereby achieving lateral series connection of the PACKs into a cluster through the positive and negative connectors of the PACKs and the sliding contact line assembly; a busbar assembly is also arranged inside the container shell, the busbar assembly is located on one side of the high-voltage box, and a transition copper busbar is arranged on the busbar assembly facing the high-voltage box; cables are also arranged inside the container shell.

[0006] The sliding contact line assembly and each PACK cluster have a high-voltage box arranged on the far right. On one side of the high-voltage box, high-voltage box B- current collector and high-voltage box B+ current collector are arranged staggered in the vertical and horizontal directions, while on the other side, high-voltage box P- current collector and high-voltage box P+ current collector are arranged staggered in the vertical and horizontal directions. The high-voltage box B+ current collector is connected to the positive terminal of the first PACK in this cluster through the sliding contact line assembly on the lower left, while the high-voltage box B- current collector is connected to the negative terminal of the last PACK in this cluster through the sliding contact line assembly on the upper left and the cable. Thus, the PACK and high-voltage box of this cluster are connected in series to form a cluster.

[0007] Preferably, the sliding contact line assembly includes a mounting bracket, an insulator, a sliding contact line, and an insulating sheath;

[0008] The sliding contact line is fixed to the mounting bracket via insulators, and the mounting bracket is fixed to the container shell. The insulating sleeve covers the upper and lower contact surfaces of the sliding contact line. The purpose of the insulating sleeve is to wrap the non-electrical contact surfaces of the sliding contact line, enhance insulation performance, and prevent accidental contact with the sliding contact line. The sliding contact line is concave on both sides, forming a first contact surface and a second contact surface respectively. The first contact surface and the second contact surface are respectively connected to the PACK and / or high-voltage box on both sides. Preferably, the sliding contact line is made of aluminum profile extrusion process, which has the best cost and performance. Alternatively, it can be made of injection molded parts with embedded conductors. The optional sliding contact line has one or more pairs of electrical contact surfaces, depending on the current level and uninterruptible power redundancy design considerations.

[0009] Preferably, the current collector includes a brush, a spring, a current collector connecting wire, a housing, and a bracket;

[0010] The brush contacts the sliding contact line to transmit power. The brush is mounted at one end of the housing, and the bracket is fixed at the other end of the housing. The bracket is fixed to the PACK and / or high-voltage box. One end of the current collector connection line is connected to the brush, and the other end is connected to the main circuit inside the PACK and / or high-voltage box. The spring is located between the bracket and the housing to ensure a stable connection between the brush and the sliding contact line and to provide reliable positive pressure on the contact surface. To facilitate the introduction of the current collector on the sliding contact line, the current collector can be designed to be installed slightly inward on the PACK and / or high-voltage box. Multiple current collectors can also be arranged in the depth direction of the PACK and / or high-voltage box. This can be used to reduce the size of the current collector or as a safety redundancy design to prevent power loss after a single current collector failure.

[0011] Preferably, the current collector is equipped with a pressure sensor for real-time detection of the contact between the brush and the sliding contact line, and for detecting the wear of the brush.

[0012] Preferably, the high-voltage box B-current collector, high-voltage box B+ current collector, high-voltage box P-current collector, and high-voltage box P+ current collector all have the same structure as the current collector.

[0013] Preferably, the high-voltage box P- current collector and high-voltage box P+ current collector on each high-voltage box are connected to the positive busbar and negative busbar respectively through the adapter copper busbar. The high-voltage box is connected to the disconnect switch through the positive busbar and negative busbar respectively. At this point, the parallel output of the battery clusters of this system is completed.

[0014] Preferably, an isolating switch is also provided on the side of the busbar assembly; a thermal management system is installed on one side of the container shell; wherein the thermal management system includes a liquid cooling unit, liquid cooling pipelines, etc.; wherein a fire-fighting component is also provided inside the container shell, the fire-fighting component includes detectors, relay modules, fire control panels, as well as audible and visual alarms, alarm bells, buttons, and fire-fighting agents, etc.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] By using current collectors and sliding contact lines to achieve rapid plugging and unplugging, and connecting them in series laterally, the wiring problem is solved and the circulating current problem of parallel clusters is avoided. This enables rapid plugging and unplugging of the energy storage system PACK and high-voltage box, and simplifies the power lines within and between clusters in the energy storage system, saving wiring space and increasing the system's energy density. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the end of the present invention;

[0020] Figure 4 This is a schematic diagram showing the arrangement of the cable of this utility model inside the container shell;

[0021] Figure 5 This is a schematic diagram of the cable routing inside the container shell according to this utility model;

[0022] Figure 6 This is a schematic diagram of the structure of the PACK of this utility model;

[0023] Figure 7 This is a schematic diagram of one side of the high-voltage box of this utility model;

[0024] Figure 8 This is a schematic diagram of the other side of the high-voltage box of this utility model;

[0025] Figure 9 This is a schematic diagram showing the connection between the mounting bracket and the sliding contact line of this utility model;

[0026] Figure 10 This is a schematic diagram of the current collector of this utility model.

[0027] In the picture:

[0028] 11. Container shell; 12. Pack;

[0029] 13. High-voltage box; 131. High-voltage box B-current collector; 132. High-voltage box B+current collector; 133. High-voltage box P-current collector; 134. High-voltage box P+current collector;

[0030] 14. Disconnecting switch; 15. Thermal management system

[0031] 17. Sliding conductor assembly; 171. Mounting bracket; 172. Insulator; 173. Sliding conductor; 174. Insulating sleeve; 31. First contact surface; 32. Second contact surface;

[0032] 18. Busbar assembly; 181. Positive busbar; 182. Negative busbar; 183. Adapter copper busbar; 184. Cable;

[0033] 19. Guide rail;

[0034] 2. Current collector; 21. Brush; 22. Spring; 23. Current collector connecting wire; 24. Housing; 25. Bracket. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0036] Please see Figures 1 to 10 This utility model provides a technical solution: an energy storage system based on a sliding contact line, including...

[0037] High voltage box 13;

[0038] The container shell 11 has several PACKs 12 inside it;

[0039] The container shell 11 is equipped with guide rails 19, and PACK 12 is fixed on the guide rails 19. A sliding contact line assembly is also installed above each guide rail 19.

[0040] Positive and negative current collectors 2 are respectively provided on both sides of PACK12. The sliding contact line assembly is connected to the positive and negative current collectors 2 on both sides of PACK12. The PACK12 is connected in a horizontal series through the positive and negative connectors of PACK and the sliding contact line assembly. A busbar assembly 18 is also provided inside the container shell 11. The busbar assembly 18 is located on one side of the high voltage box 13. The busbar assembly 18 is provided with a transition copper busbar 183 facing the high voltage box 13. Cables 184 are also arranged inside the container shell 11.

[0041] A high-voltage box 13 is arranged on the far right of each cluster of PACK12 with the sliding contact line assembly. On one side of the high-voltage box 13, high-voltage box B-current collector 131 and high-voltage box B+ current collector 132 are arranged in a staggered manner in the vertical and horizontal directions, while on the other side, high-voltage box P-current collector 133 and high-voltage box P+ current collector 134 are arranged in a staggered manner in the vertical and horizontal directions. High-voltage box B+ current collector 132 is connected to the positive terminal of the first PACK12 in this cluster through the sliding contact line assembly on the lower left side, while high-voltage box B-current collector 131 is connected to the negative terminal of the last PACK12 in this cluster through the sliding contact line assembly on the upper left side and cable 184. Thus, the PACK and high-voltage box of this cluster are connected in series to form a cluster.

[0042] In this embodiment, preferably, the sliding contact line assembly includes a mounting bracket 171, an insulator 172, a sliding contact line 173, and an insulating sheath 174.

[0043] The sliding contact line 173 is fixed to the mounting bracket 171 via insulator 172. The mounting bracket 171 is fixed to the container shell 11. An insulating sleeve 174 covers the upper and lower contact surfaces of the sliding contact line 173. The purpose of the insulating sleeve 174 is to wrap the non-electrical contact surfaces of the sliding contact line 173, enhance insulation performance, and prevent accidental contact with the sliding contact line 173. The sliding contact line 173 is recessed on both sides and forms a first contact surface 31 and a second contact surface 32, respectively. The first contact surface 31 and the second contact surface 32 are respectively connected to the PACK 12 and / or the high-voltage box 13 on both sides. Preferably, the sliding contact line 173 is made of aluminum profile extrusion process, which has the best cost and performance. It can also be made of injection molded part with embedded conductor. The optional sliding contact line 173 has one or more pairs of electrical contact surfaces, depending on the current level and backup uninterruptible power redundancy design considerations.

[0044] In this embodiment, preferably, the current collector 2 includes a brush 21, a spring 22, a current collector connecting wire 23, a housing 24, and a bracket 25;

[0045] The brush 21 contacts the sliding contact line 173 to transmit power. The brush 21 is installed at one end of the housing 24, and the bracket 25 is fixed at the other end of the housing 24. The bracket 25 is fixed to the PACK 12 and / or the high voltage box 13. One end of the current collector connection line 23 is connected to the brush 21, and the other end is connected to the main circuit inside the PACK 12 and / or the high voltage box 13. The spring 22 is located between the bracket 25 and the housing 24 to ensure a stable connection between the brush 21 and the sliding contact line 173 and to provide reliable positive pressure on the contact surface. To facilitate the introduction of the current collector 2 on the sliding contact line 173, the current collector 2 can be designed to be installed slightly inward on the PACK 12 and / or the high voltage box 13. Multiple current collectors 2 can also be arranged in the depth direction of the PACK 12 and / or the high voltage box 13. This can be used to reduce the size of the current collector 2 or as a safety redundancy design to prevent power loss after a single current collector 2 fails.

[0046] In this embodiment, preferably, a pressure sensor is arranged on the current collector 2 to detect the contact between the brush 21 and the sliding contact line 173 in real time and to detect the wear of the brush 21.

[0047] In this embodiment, preferably, the high voltage box B-current collector 131, the high voltage box B+current collector 132, the high voltage box P-current collector 133, and the high voltage box P+current collector 134 all have the same structure as the current collector 2.

[0048] In this embodiment, preferably, the high voltage box P- current collector 133 and high voltage box P+ current collector 134 on each high voltage box 13 cluster are connected to the positive busbar 181 and the negative busbar 182 respectively through the adapter copper busbar 183. The high voltage box 13 is connected to the disconnect switch 14 through the positive busbar 181 and the negative busbar 182 respectively. At this point, the parallel output of the battery clusters of this system has been completed.

[0049] In this embodiment, preferably, an isolating switch 14 is also provided on the side of the busbar assembly 18; a thermal management system 15 is installed on one side of the container shell 11; wherein the thermal management system 15 includes a liquid cooling unit, liquid cooling pipelines, etc.; wherein a fire-fighting component is also provided inside the container shell 11, the fire-fighting component includes detectors, relay modules, fire control panels, as well as audible and visual alarms, alarm bells, buttons, and fire-fighting agents, such as gaseous fire-fighting agents and liquid fire-fighting agents.

[0050] Although embodiments of the present invention have been shown and described (see the detailed description above), it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A trolley-based energy storage system, characterized by: Including the high-voltage box (13); The container shell (11) has several PACKs (12) inside it. The container shell (11) is equipped with guide rails (19), the PACK (12) is fixed on the guide rails (19), and a sliding contact line assembly is installed above each guide rail (19). Positive and negative current collectors (2) are respectively provided on both sides of the PACK (12), and the sliding contact line assembly is connected to the positive and negative current collectors (2) on both sides of the PACK (12); a busbar assembly (18) is also provided inside the container shell (11), the busbar assembly (18) is located on one side of the high voltage box (13), the busbar assembly (18) is provided with a transition copper busbar (183) facing the high voltage box (13), and cables (184) are also arranged inside the container shell (11); The sliding contact line assembly and each cluster of PACK (12) have a high voltage box (13) arranged on the far right. On one side of the high voltage box (13), the high voltage box B-current collector (131) and the high voltage box B+ current collector (132) are arranged staggered in the vertical and horizontal directions, while on the other side, the high voltage box P-current collector (133) and the high voltage box P+ current collector (134) are arranged staggered in the vertical and horizontal directions. The high voltage box B+ current collector (132) is connected to the positive terminal of the first PACK (12) in this cluster through the sliding contact line assembly on the lower left side, while the high voltage box B-current collector (131) is connected to the negative terminal of the last PACK (12) in this cluster through the sliding contact line assembly and cable (184) on the upper left side.

2. A sliding contact line based energy storage system as claimed in claim 1, wherein: The sliding contact line assembly includes a mounting bracket (171), an insulator (172), a sliding contact line (173), and an insulating sheath (174). The sliding contact line (173) is fixed to the mounting bracket (171) by an insulator (172), and the mounting bracket (171) is fixed to the container shell (11). The insulating sleeve (174) covers the upper and lower contact surfaces of the sliding contact line (173). The sliding contact line (173) is concave on both sides and forms a first contact surface (31) and a second contact surface (32) respectively. The first contact surface (31) and the second contact surface (32) are respectively connected to the two side PACKs (12) and / or high voltage boxes (13).

3. A sliding contact line based energy storage system as claimed in claim 1, wherein: The current collector (2) includes a brush (21), a spring (22), a current collector connecting wire (23), a housing (24), and a bracket (25); The brush (21) is in contact with the sliding contact line (173), the brush (21) is mounted on one end of the housing (24), the bracket (25) is fixed on the other end of the housing (24), and the bracket (25) is fixed to the PACK (12) and / or the high voltage box (13). One end of the current collector connection line (23) is connected to the brush (21), and the other end is connected to the main circuit inside the PACK (12) and / or the high voltage box (13). The spring (22) is located between the bracket (25) and the housing (24).

4. The energy storage system based on a sliding contact line according to claim 1, characterized in that: A pressure sensor is arranged on the current collector (2).

5. The energy storage system based on a sliding contact line according to claim 3, characterized in that: The high-voltage box B-current collector (131), high-voltage box B+ current collector (132), high-voltage box P-current collector (133), and high-voltage box P+ current collector (134) are all constructed in the same way as the current collector (2).

6. The energy storage system based on a sliding contact line according to claim 1, characterized in that: A disconnect switch (14) is also provided on the side of the busbar assembly (18); a thermal management system (15) is installed on one side of the container shell (11).

7. The energy storage system based on a sliding contact line according to claim 6, characterized in that: The high voltage box P- collector (133) and high voltage box P+ collector (134) on each cluster of high voltage boxes (13) are connected to the positive busbar (181) and the negative busbar (182) respectively through the adapter copper busbar (183). The high voltage box (13) is connected to the disconnect switch (14) respectively through the positive busbar (181) and the negative busbar (182).

Images