Direct-current lead-acid energy storage device for charging station

Abstract

The utility model relates to a direct-current lead-acid energy storage device for a charging station, which belongs to the technical field of energy storage devices and comprises a shelf-type rainproof cabinet and a branch box, a plurality of first lead-acid battery packs and a plurality of second lead-acid battery packs are arranged in the shelf-type rainproof cabinet, any first lead-acid battery pack comprises a plurality of first lead-acid batteries, and any second lead-acid battery pack comprises a plurality of second lead-acid batteries. Any first lead-acid battery pack comprises a plurality of first lead-acid batteries, any second lead-acid battery pack comprises a plurality of second lead-acid batteries, any two adjacent first lead-acid batteries in any first lead-acid battery pack are connected through a perforated copper bar, any two adjacent second lead-acid batteries in any second lead-acid battery pack are connected through a perforated copper bar; any first lead-acid battery pack is connected with any second lead-acid battery pack in series, one end, far away from the first lead-acid battery pack connected with the second lead-acid battery pack, of the first lead-acid battery pack is connected into a branch box, and one end, far away from the second lead-acid battery pack connected with the first lead-acid battery pack, of the second lead-acid battery pack is connected into the branch box.

Description

Technical Field

[0001] This utility model relates to the field of energy storage devices, and in particular to a DC lead-acid energy storage device for charging stations. Background Technology

[0002] With the increasing popularity of electric vehicles, energy storage technology is being used more and more widely in charging stations. Lead-acid batteries, as a mature and reliable energy storage medium, are widely used in power station energy storage systems. However, existing lead-acid battery energy storage devices still have some shortcomings in terms of structural design, connection methods, and protection performance. For example, traditional battery cabinets have complex structures, making installation and maintenance inconvenient; the series and parallel connection methods of batteries are not flexible enough to meet different capacity requirements.

[0003] Therefore, there is an urgent need for a cabinet structure for a DC lead-acid energy storage device for charging stations that is simple in structure and easy to connect. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a DC lead-acid energy storage device for charging stations to solve the problems mentioned in the background art.

[0005] To achieve the aforementioned utility model objective, this utility model provides a DC lead-acid energy storage device for charging stations, including a shelf-type rainproof cabinet and a branch box. The shelf-type rainproof cabinet is equipped with a plurality of first lead-acid battery packs and a plurality of second lead-acid battery packs. Any first lead-acid battery pack includes a plurality of first lead-acid batteries, and any second lead-acid battery pack includes a plurality of second lead-acid batteries. In any first lead-acid battery pack, any two adjacent first lead-acid batteries are connected by perforated copper busbars. In any second lead-acid battery pack, any two adjacent second lead-acid batteries are connected by perforated copper busbars. Any first lead-acid battery pack and any second lead-acid battery pack are connected in series. The end of the first lead-acid battery pack away from its connection with the second lead-acid battery pack is connected to the branch box, and the end of the second lead-acid battery pack away from its connection with the first lead-acid battery pack is connected to the branch box. The devices are connected to a DC bus via branch lines.

[0006] Furthermore, the branch box includes a housing and a circuit protection unit, the circuit protection unit including a circuit breaker for emergency disconnection of the lead-acid battery pack from the DC bus.

[0007] Furthermore, the DC lead-acid energy storage device includes three rows of first lead-acid battery packs and three rows of second lead-acid battery packs. The three rows of second lead-acid battery packs are arranged above the three rows of first lead-acid battery packs. The three rows of first lead-acid battery packs are arranged in a vertical direction, and the three rows of second lead-acid battery packs are arranged in a vertical direction.

[0008] Furthermore, any first lead-acid battery pack includes 27 first lead-acid batteries, and any second lead-acid battery pack includes 27 second lead-acid batteries.

[0009] Furthermore, the voltage of any first lead-acid battery pack connected in series with any second lead-acid battery pack is 600V-800V.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] This application provides a simple structure and convenient installation and maintenance by placing lead-acid batteries in a shelf-type rainproof cabinet and connecting single strings of lead-acid batteries to provide a voltage of 600V-800V. It also features a circuit protection unit for good safety. Attached Figure Description

[0012] Figure 1 This is a cross-sectional structural diagram of an embodiment of the present utility model. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the utility model, not all embodiments. The embodiments of this utility model are described below with reference to the accompanying drawings.

[0014] like Figure 1 As shown, a DC lead-acid energy storage device for a charging station includes a shelf-type rainproof cabinet 1 and a branch box 2. The shelf-type rainproof cabinet 1 is provided with a plurality of first lead-acid battery packs 3 and a plurality of second lead-acid battery packs 4. Any first lead-acid battery pack 3 includes a plurality of first lead-acid batteries 5, and any second lead-acid battery pack 4 includes a plurality of second lead-acid batteries 6. In any first lead-acid battery pack 3, any two adjacent first lead-acid batteries 5 are connected by perforated copper busbars. In any second lead-acid battery pack 4, any two adjacent second lead-acid batteries 6 are connected by perforated copper busbars. Any first lead-acid battery pack 3 and any second lead-acid battery pack 4 are connected in series. The end of the first lead-acid battery pack 3 away from its connection with the second lead-acid battery pack 4 is connected to the branch box 2. The end of the second lead-acid battery pack 4 away from its connection with the first lead-acid battery pack 3 is connected to the branch box 2 and connected to the DC bus through a branch line.

[0015] The internal structure of the shelf-type rainproof cabinet 1 is multi-layered. Single-string lead-acid batteries are placed horizontally, layer by layer, to create multiple layers. The shelf-type rainproof cabinet 1 is used to hold several first lead-acid battery packs 3 and several second lead-acid battery packs 4. Conventional lead-acid batteries are used, with 54 batteries connected in series to form a single battery pack, which can form several lead-acid battery packs with voltages of 600V-800V. Perforated copper busbars are used as the connectors for the series and parallel connection of the batteries, which has the following advantages: convenient assembly and disassembly, reducing maintenance difficulty; copper has good conductivity, reducing voltage drop; the perforated design facilitates fixing battery terminals or connecting bolts.

[0016] Branch box 2 includes a box body and a circuit protection unit. The circuit protection unit includes a circuit breaker for emergency disconnection of the lead-acid battery pack from the DC bus. The lead-acid battery discharges through the DC bus. The functions of branch box 2 include: centrally connecting the positive and negative terminals of multiple energy storage units, providing an interface for easy automatic control, and quickly disconnecting the faulty unit through branch box 2 in abnormal conditions (such as overvoltage, overcurrent, short circuit, etc.) to ensure the safety of the battery system.

[0017] The DC lead-acid energy storage device includes three rows of first lead-acid battery packs 3 and three rows of second lead-acid battery packs 4. The three rows of second lead-acid battery packs 4 are arranged above the three rows of first lead-acid battery packs 3. The three rows of first lead-acid battery packs 3 are arranged in the vertical direction, and the three rows of second lead-acid battery packs 4 are arranged in the vertical direction.

[0018] Any first lead-acid battery pack 3 includes 27 first lead-acid batteries 5, and any second lead-acid battery pack 4 includes 27 second lead-acid batteries 6. The negative terminal of the first lead-acid battery 5 is on the left and the positive terminal is on the right, the positive terminal of the second lead-acid battery 6 is on the right and the negative terminal of the second lead-acid battery 6 is on the left, so that the voltage of any first lead-acid battery pack 3 and any second lead-acid battery pack 4 connected in series is 600V-800V.

[0019] This application provides a simple structure and convenient installation and maintenance by placing lead-acid batteries in a shelf-type rainproof cabinet 1 and connecting single strings of lead-acid batteries to provide a voltage of 600V-800V. It also features a circuit protection unit for good safety.

[0020] The technical solution of this utility model has been described above with reference to specific embodiments. However, it should be noted that the above description is only for explaining the solution of this utility model and should not be construed as a specific limitation on the scope of protection of the utility model in any way. Based on this explanation, other specific embodiments or equivalent substitutions of this utility model that can be conceived by those skilled in the art without creative effort will all fall within the scope of protection of this utility model.

Claims

1. A DC lead-acid energy storage device for charging stations, characterized in that, The device includes a shelf-type rainproof cabinet and a branch box. The shelf-type rainproof cabinet contains several first lead-acid battery packs and several second lead-acid battery packs. Each first lead-acid battery pack includes several first lead-acid batteries, and each second lead-acid battery pack includes several second lead-acid batteries. In any first lead-acid battery pack, any two adjacent first lead-acid batteries are connected by perforated copper busbars. In any second lead-acid battery pack, any two adjacent second lead-acid batteries are connected by perforated copper busbars. Any first lead-acid battery pack and any second lead-acid battery pack are connected in series. The end of the first lead-acid battery pack away from its connection with the second lead-acid battery pack is connected to the branch box, and the end of the second lead-acid battery pack away from its connection with the first lead-acid battery pack is connected to the branch box. The components are connected to a DC bus via branch lines.

2. The DC lead-acid energy storage device for charging stations according to claim 1, characterized in that, The branch box includes a box body and a circuit protection unit, which includes a circuit breaker for emergency disconnection of the lead-acid battery pack from the DC bus.

3. The DC lead-acid energy storage device for charging stations according to claim 1, characterized in that, The DC lead-acid energy storage device includes three rows of first lead-acid battery packs and three rows of second lead-acid battery packs. The three rows of second lead-acid battery packs are arranged above the three rows of first lead-acid battery packs. The three rows of first lead-acid battery packs are arranged in a vertical direction, and the three rows of second lead-acid battery packs are arranged in a vertical direction.

4. The DC lead-acid energy storage device for charging stations according to claim 3, characterized in that, Any first lead-acid battery pack includes 27 first lead-acid batteries, and any second lead-acid battery pack includes 27 second lead-acid batteries.

5. The DC lead-acid energy storage device for charging stations according to claim 4, characterized in that, The voltage of any first lead-acid battery pack connected in series with any second lead-acid battery pack is 600V-800V.

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