CN-224218127-U - Energy storage system

Abstract

The utility model discloses an energy storage system which comprises energy storage power equipment and a plurality of battery packs connected with the energy storage power equipment, wherein the energy storage power equipment is provided with at least two power interface units and at least two level control circuits, each battery pack is respectively provided with a voltage dividing circuit and two battery interface units connected with each other, each power interface unit respectively comprises a voltage detection interface, each level control circuit is respectively connected with each voltage detection interface in a one-to-one correspondence mode, each battery interface unit respectively comprises a voltage feedback interface, the voltage dividing circuit is connected with two voltage feedback interfaces connected with each other in the battery pack, and when each battery interface unit of the battery pack is connected with one of the power interface units of the energy storage power equipment, the two voltage feedback interfaces connected with each other in the battery pack are connected with the voltage detection interface in the corresponding power interface unit. The utility model can reliably and automatically identify the number of the battery packs respectively connected to each power interface unit of the energy storage power supply equipment.

Inventors

• YOU YONGLIANG
• LI XIANGZHUANG
• WU GENGJIAN
• MA CHANGFENG

Assignees

• 深圳市德兰明海新能源股份有限公司

Dates

Publication Date

20260508

Application Date

20250317

Claims (10)

1. 1. The energy storage system is characterized by comprising energy storage power supply equipment and a plurality of battery packs used for being connected with the energy storage power supply equipment, wherein the energy storage power supply equipment is provided with at least two power interface units and at least two level control circuits, the level control circuits are in one-to-one correspondence with the power interface units, and each battery pack is respectively provided with a voltage dividing circuit and two battery interface units connected with each other; Each power interface unit comprises a voltage detection interface, each level control circuit is connected to each voltage detection interface in a one-to-one correspondence manner, each battery interface unit comprises a voltage feedback interface, and the voltage dividing circuit is connected to two voltage feedback interfaces connected with each other in the battery pack; When each battery interface unit of the battery pack is connected to one of the power interface units of the energy storage power supply device, the two voltage feedback interfaces connected with each other in the battery pack are connected with the voltage detection interfaces in the corresponding power interface units.
2. 2. The energy storage system of claim 1, wherein each of said level control circuits comprises a first resistor, a first end of said first resistor being connected to said voltage detection interface, and a second end of said first resistor being connected to a power supply.
3. 3. The energy storage system of claim 2, wherein the first resistor has a resistance greater than 1000 Ω.
4. 4. The energy storage system of claim 1, wherein the voltage divider circuit comprises a voltage divider resistor, a first end of the voltage divider resistor is connected to the voltage feedback interface, and a second end of the voltage divider resistor is connected to a battery pack control end.
5. 5. The energy storage system of claim 4, wherein the divider resistor has a resistance greater than 1000 Ω.
6. 6. The energy storage system of claim 4, wherein each of said battery packs further comprises a battery switch tube, a first end of said battery switch tube being connected to a first end of said voltage dividing resistor, a second end of said battery switch tube being grounded, and a control end of said battery switch tube being connected to said battery pack control end.
7. 7. The energy storage system of claim 1, wherein the energy storage power supply device comprises a relay, the relay is provided with a common terminal and at least two connection terminals, the common terminal is used for being connected with a voltage sampling circuit, and each connection terminal is connected with each voltage detection interface in a one-to-one correspondence.
8. 8. The energy storage system of claim 7, wherein the relay further comprises a coil and a first switching tube, a first end of the coil is connected to a power supply terminal, a second end of the coil is connected to a first end of the first switching tube, a second end of the first switching tube is grounded, and a control terminal of the first switching tube is connected to a relay control terminal.
9. 9. The energy storage system of claim 1, wherein two battery interface units connected to each other in each battery pack are a first battery interface unit connected to one of the power interface units or the second battery interface unit of the other battery pack, and a second battery interface unit for connecting to the first battery interface unit of the other battery pack, respectively.
10. 10. The energy storage system of claim 1, wherein each of said power interface units comprises a first current carrying interface group and a first signal interface group, and each of said battery interface units comprises a second current carrying interface group and a second signal interface group, and wherein when each of said battery interface units of said battery pack is connected to one of said power interface units of said energy storage power device, two of said battery packs are connected to each other of said second current carrying interface groups of said corresponding power interface units, and two of said battery packs are connected to each other of said second signal interface groups of said corresponding power interface units.

Description

Energy storage system Technical Field The utility model relates to the technical field of energy storage, in particular to an energy storage system. Background In order to enable the energy storage power supply equipment to achieve longer endurance time, the scheme that the energy storage power supply equipment is matched with a plurality of battery packs is more and more in use, namely, the scheme that the energy storage power supply equipment drags a plurality of battery packs is more and more diversified, two interfaces are reserved for the design of charging and discharging interfaces of the energy storage power supply equipment, the charging and discharging interfaces of the battery packs are also two, and in the use stage, various modes, such as 2 5 combination connection methods are adopted for connecting the energy storage power supply equipment and the battery packs, for example, the energy storage power supply equipment is matched with 4 battery packs, and two common connection methods are adopted as shown in fig. 1 and 2. The first connection mode is that the charging and discharging ports of the energy storage power supply device 10 are equally divided into four battery packs 20 (specifically, a first battery pack 201, a second battery pack 202, a third battery pack 203 and a fourth battery pack 204 respectively), namely, the first battery pack 201 and the second battery pack 202 are connected to one interface of the energy storage power supply device 10, the third battery pack 203 and the fourth battery pack 204 are connected to the other interface of the energy storage power supply device 10, and the second connection mode is that the four battery packs (comprising the first battery pack 201, the second battery pack 202, the third battery pack 203 and the fourth battery pack 204) are in hand, namely, the first battery pack 201, the second battery pack 202, the third battery pack 203 and the fourth battery pack 204 are all connected to the same interface of the energy storage power supply device 10. In the first wiring mode, the number of battery packs charged by two interfaces of the energy storage power supply device 10 is balanced, so that the energy storage power supply device 10 can reliably work at full power, and in the second wiring mode, the energy storage power supply device 10 cannot output full power or a connecting wire is easy to overload due to the fact that only one interface of the energy storage power supply device 10 is charged with 4 battery packs to work, and potential safety hazards exist. The prior art energy storage power supply device cannot identify the manner in which the battery pack is connected thereto. In order to enable the energy storage power supply device to reliably work at full power and enable the battery pack to fully function, most designers currently adopt a mode to avoid the problem that the energy storage power supply device cannot identify the mode in which the battery pack is connected with the energy storage power supply device, namely 1, adopting a mode of using manual explanation to inform a user to pay attention to wiring according to a first wiring mode, 2, thickening a cable connected with the energy storage power supply device and the battery pack, and focusing on a current-carrying power cable so as to achieve the aim of safe use under the full power working condition, in the method 1, the problem cannot be noticed by all users due to wide involved users, and potential safety hazards exist in use, in the method 2, although the potential safety hazards can be avoided, the cost of connecting the cable is high, meanwhile, the battery pack at the tail end can be connected with the energy storage power supply device through four connecting wires, and particularly, the design scheme of the cable is not negligible. Therefore, the connection result of the first connection mode is desired, and if the first connection mode needs to be implemented, the number of battery packs respectively connected to each interface in the energy storage power supply device needs to be clearly acquired first. The foregoing background is only for the purpose of facilitating an understanding of the principles and concepts of the utility model and is not necessarily in the prior art to the present application and is not intended to be used as an admission that such background is not entitled to antedate such novelty and creativity by virtue of prior utility model or that it is already disclosed at the date of filing of this application. Disclosure of utility model In order to solve the technical problems, the utility model provides an energy storage system which can reliably and automatically identify the number of battery packs respectively connected to each power interface unit of energy storage power supply equipment. In order to achieve the above purpose, the present utility model adopts the following technical scheme: The utility model discloses an energy storage syst