CN220273331U - Parallel charging and discharging device and multi-battery energy storage system thereof - Google Patents
Parallel charging and discharging device and multi-battery energy storage system thereof Download PDFInfo
- Publication number
- CN220273331U CN220273331U CN202223187739.7U CN202223187739U CN220273331U CN 220273331 U CN220273331 U CN 220273331U CN 202223187739 U CN202223187739 U CN 202223187739U CN 220273331 U CN220273331 U CN 220273331U
- Authority
- CN
- China
- Prior art keywords
- charging
- parallel
- battery
- unit
- voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000007599 discharging Methods 0.000 title claims abstract description 56
- 238000004146 energy storage Methods 0.000 title claims abstract description 22
- 238000006243 chemical reaction Methods 0.000 claims description 28
- 230000005669 field effect Effects 0.000 claims description 6
- 238000000034 method Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
Abstract
The utility model discloses a parallel charging and discharging device and a multi-battery energy storage system thereof, and relates to the field of energy storage systems of rechargeable batteries and charging and discharging devices. In the utility model, the parallel charging and discharging device is provided with a plurality of access modules, the access modules are used for accessing the battery units, and different battery units can be connected to the input ends of the parallel buses through the access modules and uniformly charged and discharged through the charging and discharging ports by the output ends of the parallel buses; meanwhile, a switch unit for controlling whether the batteries are connected into the parallel buses is arranged in each access module, and the switch unit is controlled to be switched on and off by the control module according to the voltage information of the connected batteries, so that the user can self-balance the charging efficiency requirement and carry weight to self-configure the number of the batteries, the plurality of battery units can be charged and discharged in parallel with the voltages close to each other, and the safety of the charging and discharging process is ensured.
Description
Technical Field
The utility model relates to the field of energy storage systems and charging and discharging devices of rechargeable batteries, in particular to a parallel charging and discharging device and a multi-battery energy storage system thereof.
Background
Currently, the battery energy storage products in the market have a plurality of application scenes, such as a mobile power supply, an emergency power supply, an outdoor power supply and the like.
In the prior art, on the one hand, most battery energy storage products are monolithic. That is, the energy storage battery portion and the power conversion portion are disposed within the same housing. Some battery energy storage products also have an external battery, but the structure is basically that a main battery is arranged inside the product, and the external battery is an auxiliary battery.
On the other hand, in order to improve the discharge efficiency of the battery energy storage product, it is inevitably necessary to discharge a plurality of battery cells in parallel. However, due to the differences of manufacturers, batches, current running states, current service lives and the like of the battery cells, when the battery cells are directly charged and discharged in parallel, partial battery cells cannot normally run due to light weight, and even explosion of the battery cells can be caused due to serious conditions. For example, for an externally hung energy storage product, the service life of the main battery is reduced due to long-term use, and if the main battery is directly charged and discharged in parallel with the externally hung auxiliary battery, a safety problem is caused.
Disclosure of Invention
In view of the above, a primary object of the present application is to provide a parallel charging and discharging device that allows multiple batteries to be connected, and simultaneously can safely control whether each battery is connected in a parallel configuration, thereby ensuring that a user can access the multiple batteries as needed and ensuring the safety of parallel charging and discharging.
The main purpose of the present application is also to provide a multi-battery energy storage system using the parallel charging and discharging device, which can realize that a plurality of battery cells with a required number are safely charged or discharged in a parallel manner, and each battery cell circuit has a simple structure.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
in a first aspect, the utility model provides a parallel charging and discharging device, comprising a control module, a parallel bus, and at least two access modules;
each access module comprises an electric connection port and a switch unit, wherein the electric connection ports are used for accessing the batteries and are connected to the input ends of the parallel buses, the switch units are arranged between the electric connection ports and the input ends of the parallel buses so as to disconnect or connect the batteries with the input ends of the parallel buses, and the output ends of the parallel buses are provided with charge and discharge ports;
the control module is electrically connected with each access module to acquire the voltage information of each accessed battery, and is electrically connected with the control end of each switch unit to control the on or off of the switch unit according to the voltage information.
Optionally, the control module is used for controlling the switching unit with the lowest voltage of the battery to be conducted in the charging mode, and controlling the switching units with the rest differences from the lowest voltage not to exceed a threshold value to be conducted; and/or the control module is used for controlling the switching unit with the highest battery voltage to be conducted in a discharging mode and controlling the switching units with the rest voltage differences not exceeding a threshold value to be conducted.
The device optionally comprises a control module, a comparison judging unit, a driving unit and a storage unit;
the acquisition unit is used for being electrically connected to the positive electrode circuit of each access module and providing the acquired voltage information of the battery for the comparison and judgment unit;
the storage unit is used for storing a preset threshold value of the voltage difference;
the comparison judging unit is used for judging whether the parallel bus operates in a charging mode or a discharging mode, and is used for comparing the highest voltage or the lowest voltage, comparing the difference between the highest voltage or the lowest voltage and the magnitude relation between the difference and a preset threshold value, and sending a control instruction to the driving unit;
the driving unit is used for driving the switching unit corresponding to the lowest voltage to be conducted in a charging mode, driving the switching unit with the difference exceeding the threshold value to be conducted, driving the switching unit with the difference exceeding the threshold value to be disconnected, and driving the switching unit corresponding to the highest voltage to be conducted in a discharging mode, driving the switching unit with the difference not exceeding the threshold value to be conducted, and driving the switching unit with the difference exceeding the threshold value to be disconnected.
The device described above optionally comprises at least two switching elements connected in series.
The above device may alternatively be a field effect transistor, or a relay.
Optionally, the device further comprises a power conversion circuit, wherein the power conversion circuit is used for discharging the battery accessed from the parallel bus after power conversion and charging the battery unit accessed to the parallel bus after power conversion.
The power conversion circuit comprises a DC-AC inverter circuit, one end of the DC-AC inverter circuit is connected with the output end of the parallel bus, the other end of the DC-AC inverter circuit is used as a charge and discharge port, and the control module is connected with the control end of the DC-AC inverter circuit.
The device optionally comprises a DC-DC conversion circuit, one end of the DC-DC conversion circuit is connected with the output end of the parallel bus, the other end of the DC-DC conversion circuit is used as a charge and discharge port, and the control module is connected with the control end of the DC-DC conversion circuit.
In a second aspect, the present utility model provides a multi-battery energy storage system including the parallel charging and discharging device, further including at least two battery units, wherein an output end of each battery unit is provided with an electrical connection member, and the electrical connection member can be matched with any electrical connection port.
The above system optionally wherein the rated output voltage of each of said battery cells is the same.
Compared with the prior art, the utility model has the following beneficial effects:
(1) The parallel charging and discharging device can be connected with the batteries from a plurality of access modules arranged in the device, each battery is connected to the input end of the parallel bus through the access module and uniformly charged and discharged through the charging and discharging port by the output end of the parallel bus, meanwhile, a switch unit for controlling whether the battery is connected with the parallel bus or not is arranged in each access module, and the switch unit is controlled to be switched on and off by the control module according to the voltage information of the connected battery, so that a user can self-balance the charging efficiency requirement and the quantity of the batteries which are self-configured in consideration of carrying weight, and the plurality of battery units can charge and discharge in parallel with the same voltage, and the safety of the charging and discharging process is ensured.
(2) The energy storage system is also provided with a plurality of battery units, each battery unit can be connected to the parallel charging and discharging device in a plugging manner, meanwhile, the battery unit is simple in structure and does not need to be changed, and the energy storage system is realized that multiple batteries are required to be connected in a connected mode and the safety of parallel charging and discharging of the multiple batteries is ensured.
The utility model is further described below with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic circuit diagram of an energy storage system according to a first embodiment of the present utility model;
fig. 2 is a schematic circuit configuration diagram of a parallel charging and discharging device according to a first embodiment of the present utility model;
fig. 3 is a schematic circuit diagram of an energy storage system according to a second embodiment of the present utility model.
Reference numerals: 10. a control module; 101. an acquisition unit; 102. a comparison judgment unit; 103. a driving unit; 104. a storage unit; 20. a parallel bus; 201. the input ends of the bus bars are connected in parallel; 202. the output end of the parallel bus; 30. an access module; 31. an electrical connection port; 32. a switching unit; 40. a charge-discharge port; 50. a battery unit; 60. a DC-AC inverter circuit; 70. a DC-DC conversion circuit.
Detailed Description
For a better illustration of the objects, technical solutions and advantages of the present utility model, the following detailed description of the present utility model will be given with reference to the accompanying drawings and examples.
As shown in fig. 1, a first embodiment according to the present utility model is a multi-cell energy storage system comprising a parallel charging and discharging device according to the first embodiment of the present utility model, and comprising at least two battery cells 50, denoted A, B, …, N. In order to achieve the technical purpose of the present application, a parallel charging and discharging device of the present embodiment includes a control module 10, a parallel bus 20 and an access module 30. The access module 30 is provided with at least two of the labels A, B, …, N. Each access module 30 is provided with an electrical connection port 31 and a switching unit 32, each electrical connection port 31 is externally fittingly connected with an electrical connection member of any battery cell 50, each electrical connection port 31 is internally connected with an input terminal 201 of the parallel bus bar 20, and the switching unit 32 is provided between the electrical connection port 31 and the input terminal of the parallel bus bar 20 to disconnect or conduct the electrical connection between the battery cell 50 and the input terminal of the parallel bus bar 20. Specifically, the positive and negative electrodes of the battery unit 50 are connected with the positive and negative electrodes of the electrical connection port 31 in a plugging manner, the positive and negative electrodes of the electrical connection port 31 are connected with the positive and negative electrodes of the input end of the parallel bus 20, and a switching element, that is, a switching unit 32 of the access module 30 is arranged on the positive connection line or the negative connection line of the electrical connection port 31 and the input end of the parallel bus 20. The output of the parallel bus 20 is provided with a charge-discharge port 40 for connection to a discharge load or a charging source. The control module 10 has a number of input terminals corresponding to the access modules 30, each of which is electrically connected to the positive line between the electrical connection port 31 and the parallel bus bar 20, respectively, to acquire voltage information of each access module 30, respectively. The control module 10 further has a plurality of output terminals, each of which is respectively used for controlling the switch units 32 to be connected or disconnected, so as to control the switch units 32 to be connected or disconnected, and the control module 10 forms a control signal at the output terminals according to the voltage information of each of the connected battery units 50, so as to ensure that each of the connected battery units 50 is conducted to the parallel bus 20 without exceeding the safety range in fact.
Illustratively, in use, the parallel charging and discharging device of the present first embodiment, two battery cells 50, labeled A, B, are respectively plugged into two electrical connection ports 31 of the parallel charging and discharging device via their electrical connections. When the battery needs to be discharged, the charge-discharge port 40 of the parallel charge-discharge device is connected to the load. Initially, A, B two battery cells 50 are connected to the access module 30, but the switching unit 32 in the access module 30 is open. Then, the control module 10 detects the voltage information of the battery cells 50, i.e., VA and VB, through the lines in the access module 30. The control module 10 determines the highest voltage of VA and VB, e.g., VA, and accordingly turns on the switching unit 32 of the access module 30 labeled a. If the difference between VA and VB exceeds the threshold Δvvref, the control module 10 maintains the opening of the switching unit 32 of the access module 30, labeled B. At this time, the discharge is performed by the battery cell 50 labeled a, and the voltage gradually decreases so that the difference between VA and VB does not exceed the threshold Δvvref. The control module 10 detects that the difference between VA and VB does not exceed the threshold Δvvref and turns on the switching unit 32 of the access module 30 labeled B. At this time, the load is discharged by the two battery cells 50 labeled a and B, and the discharge power will be increased.
Similarly, when the parallel charging/discharging device needs to be charged, the charging/discharging port 40 of the parallel charging/discharging device is connected to a charging power source. The charging power supply charges two battery units 50, which are connected in via the parallel bus 20 and the connection module 30 and are marked as A, B, respectively. Initially, the control module 10 controls the switching units 32 in the access modules 30, respectively, labelled A, B to be switched off. Then, the control module 10 detects the voltage information of the battery cells 50, i.e., VA and VB, through the lines in the access module 30. The control module 10 determines the lowest voltage of VA and VB, e.g., VA, and accordingly turns on the switching unit 32 of the access module 30 labeled a. If the difference between VA and VB exceeds the threshold Δvvref, the control module 10 maintains the opening of the switching unit 32 of the access module 30, labeled B. At this time, only the battery cell 50 marked a is charged, and the voltage gradually rises so that the difference between VA and VB does not exceed the threshold Δvvref. The control module 10 detects that the difference between VA and VB does not exceed the threshold Δvvref and turns on the switching unit 32 of the access module 30 labeled B. At this time, the two battery cells 50 marked as a and B will be charged at the same time, and the efficiency of charging will be improved.
As can be seen, the first embodiment can realize that the user can self-balance the charging efficiency requirement and carry weight to self-configure the number of batteries, and realize that the plurality of battery units 50 can perform parallel charging and discharging with adjacent voltages, and ensure the safety of the charging and discharging process.
As shown in fig. 2, the first embodiment is a parallel charging and discharging device. The control module 10 includes an acquisition unit 101, a comparison and judgment unit 102, a driving unit 103 and a storage unit 104. The acquisition unit 101 is configured to be electrically connected to the positive electrode lines of the respective access modules 30, so as to detect VA, VB, …, and VN voltage information, and provide the VA, VB, …, and VN voltage information to the comparison and judgment unit 102. The storage unit 104 is configured to store a preset threshold value Δvref of the voltage difference and to provide the comparison and judgment unit 102 with the threshold value Δvref. The comparison and judgment unit 102 is used for judging whether the parallel bus 20 is operated in the charging mode or the discharging mode, and is used for comparing the highest voltage or the lowest voltage, comparing the difference between the highest voltage or the lowest voltage and comparing the magnitude relation between the difference and a preset threshold DeltaVref to send a control instruction to the driving unit 103. The driving unit 103 is configured to control the switch units 32 corresponding to the access modules 30 marked as A, B, …, and N, and implement that the switch unit 32 corresponding to the lowest voltage is turned on in the charging mode, the switch unit 32 whose comparison difference between the on and the lowest voltage does not exceed the threshold Δvref is turned on, and the switch unit 32 whose comparison difference between the on and the lowest voltage exceeds the threshold Δvref is turned off. Meanwhile, the switching unit 32 corresponding to the highest voltage is turned on in the discharging mode, the switching unit 32 with the difference compared with the highest voltage not exceeding the threshold DeltaVref is turned on, and the switching unit 32 with the difference compared with the highest voltage exceeding the threshold DeltaVref is turned off. It can be seen that the present embodiment can ensure that the voltage difference between the battery cells 50 connected to the parallel bus 20 does not exceed the preset voltage difference threshold Δvef all the time by the simple structure of the control module 10.
As shown in fig. 3, a second embodiment according to the present utility model is a multi-cell energy storage system comprising a parallel charging and discharging device according to the second embodiment of the present utility model, and comprising at least two battery cells 50, denoted A, B, …, N. In order to achieve the technical purpose of the present application, a parallel charging and discharging device of the present embodiment includes a control module 10, a parallel bus 20, an access module 30 and a power conversion circuit. The access module 30 is provided with at least two of the labels A, B, …, N. The battery cells 50 may be connected by their electrical connections to the access modules 30 of the parallel charge and discharge device with charge and discharge ports 40 provided in the parallel charge and discharge device for charge and discharge access of each of the accessed battery cells 50. The power conversion circuit includes a DC-AC inverter circuit 60 and a DC-DC conversion circuit 70. The control module 10 is also used to control the operation of the DC-AC inverter circuit 60 and the DC-DC conversion circuit 70.
Specifically, one end of the DC-AC inverter circuit 60 is connected to the output end 202 of the parallel bus 20, and the other end of the DC-AC inverter circuit 60 serves as the charge/discharge port 40. The control module 10 is connected to a control terminal of the DC-AC inverter circuit 60. When in use, when the power source is 220V AC, the power source can be directly connected from the charge-discharge port 40 of the DC-AC inverter circuit 60. The power is converted by the DC-AC inverter circuit 60 into direct current for charging of the appropriate battery cell 50. When a load is required to output 220V AC power, the load may be directly connected from the charge-discharge port 40 of the DC-AC inverter circuit 60 to obtain power.
Specifically, one end of the DC-DC conversion circuit 70 is connected to the output end 202 of the parallel bus 20, and the other end of the DC-DC conversion circuit 70 serves as the D charge/discharge port 40. The control module 10 is connected to a control terminal of the DC-DC conversion circuit 70. When the power supply is 24V DC, the power supply can be directly connected from the charge/discharge port 40 of the DC-DC converter circuit 70. The power is converted by the DC-DC conversion circuit 70 into direct current for charging of the appropriate battery cell 50. When a load is required to output 24V DC power, the load may be directly connected from the charge-discharge port 40 of the DC-DC converter circuit 70 to obtain power. Therefore, the parallel charging and discharging device of the embodiment can realize multifunctional charging and discharging.
In other embodiments according to the present utility model, to implement the function of the switching unit 32, the switching unit 32 specifically uses a field effect transistor as a switching element, that is, the switching unit 32 is composed of two field effect transistors connected in series with each other. The two field effect transistors are oppositely arranged, and the parasitic diodes in the two field effect transistors can ensure that the battery unit 50 is not conducted with the parallel bus 20 in the charging and discharging process when the switch piece is turned off. In other embodiments, the switch may also be a transistor, or a relay. The foregoing embodiments have described primarily the basic principles, principal features and advantages of the utility model.
It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims.
Claims (10)
1. The parallel charging and discharging device is characterized by comprising a control module (10), a parallel bus (20) and at least two access modules (30);
each access module (30) comprises an electric connection port (31) and a switch unit (32), wherein the electric connection port (31) is used for accessing a battery and is connected to the input end of the parallel bus (20), the switch unit (32) is arranged between the electric connection port (31) and the input end of the parallel bus (20) so as to disconnect or connect the battery with the input end of the parallel bus (20), and the output end of the parallel bus (20) is provided with a charge and discharge port (40);
the control module (10) is electrically connected to each access module (30) to obtain voltage information of each accessed battery, and the control module (10) is electrically connected to a control end of each switch unit (32) to control on or off of the switch units (32) according to the voltage information.
2. A parallel charging and discharging device according to claim 1, characterized in that the control module (10) is adapted to control the switching unit (32) with the lowest battery voltage to be turned on in the charging mode and to control the remaining switching units (32) with a difference from the lowest voltage not exceeding a threshold value to be turned on; and/or the control module (10) is used for controlling the switching unit (32) with the highest battery voltage to be conducted in the discharging mode and controlling the switching unit (32) with the rest of the highest voltage difference not to exceed the threshold value to be conducted.
3. The parallel charging and discharging device according to claim 2, wherein the control module (10) comprises a collecting unit (101), a comparing and judging unit (102), a driving unit (103) and a storage unit (104);
the acquisition unit (101) is used for being electrically connected to the positive electrode line of each access module (30) and providing the acquired voltage information of the battery to the comparison judging unit (102);
the storage unit (104) is used for storing a preset threshold value of the voltage difference;
the comparison judging unit (102) is used for judging whether the parallel bus (20) operates in a charging mode or a discharging mode, comparing the highest voltage or the lowest voltage, comparing the difference between the highest voltage or the lowest voltage and the magnitude relation between the difference and a preset threshold value, and sending a control instruction to the driving unit (103);
the driving unit (103) is used for driving the switching unit (32) corresponding to the lowest voltage to be conducted in a charging mode, driving the switching unit (32) which is different from the lowest voltage and exceeds a threshold value to be conducted, driving the switching unit (32) which is different from the lowest voltage and exceeds the threshold value to be disconnected, and is used for driving the switching unit (32) corresponding to the highest voltage to be conducted in a discharging mode, driving the switching unit (32) which is different from the highest voltage and does not exceed the threshold value to be conducted, and driving the switching unit (32) which is different from the highest voltage and exceeds the threshold value to be disconnected.
4. A parallel charging and discharging device according to claim 1, characterized in that the switching unit (32) consists of at least two switching elements connected in series with each other.
5. The parallel charging and discharging device according to claim 4, wherein the switching element is a field effect transistor, or a relay.
6. The parallel charging and discharging device according to claim 1, further comprising a power conversion circuit for discharging the battery connected from the parallel bus bar (20) after power conversion and charging the battery connected to the parallel bus bar (20) after power conversion.
7. The parallel charging and discharging device according to claim 6, wherein the power conversion circuit comprises a DC-AC inverter circuit (60), one end of the DC-AC inverter circuit (60) is connected to an output end of the parallel bus (20), the other end of the DC-AC inverter circuit (60) is used as a charging and discharging port (40), and the control module (10) is connected to a control end of the DC-AC inverter circuit (60).
8. The parallel charging and discharging device according to claim 6, wherein the power conversion circuit comprises a DC-DC conversion circuit (70), one end of the DC-DC conversion circuit (70) is connected to an output end of the parallel bus (20), the other end of the DC-DC conversion circuit (70) is used as a charging and discharging port (40), and the control module (10) is connected to a control end of the DC-DC conversion circuit (70).
9. A multi-cell energy storage system comprising a parallel charging and discharging device according to any of claims 1 to 8, characterized in that it further comprises at least two battery cells (50), the output of the battery cells (50) being provided with electrical connectors which can be mated to any electrical connection port (31).
10. The multi-cell energy storage system of claim 9, wherein the rated output voltage of each of the battery cells (50) is the same.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223187739.7U CN220273331U (en) | 2022-11-30 | 2022-11-30 | Parallel charging and discharging device and multi-battery energy storage system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223187739.7U CN220273331U (en) | 2022-11-30 | 2022-11-30 | Parallel charging and discharging device and multi-battery energy storage system thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220273331U true CN220273331U (en) | 2023-12-29 |
Family
ID=89310884
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223187739.7U Active CN220273331U (en) | 2022-11-30 | 2022-11-30 | Parallel charging and discharging device and multi-battery energy storage system thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220273331U (en) |
-
2022
- 2022-11-30 CN CN202223187739.7U patent/CN220273331U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TWI398068B (en) | Unitized charging and discharging battery management system and programmable battery management module thereof | |
| CN201639290U (en) | Device for preventing main loop of backup battery from being inversely connected | |
| US9643506B2 (en) | Portable backup charger | |
| KR101772975B1 (en) | Battery module with cell balancing function and Battery System having that battery module | |
| US10243192B2 (en) | Modular battery case for prismatic cells and portable off-grid power storage and delivery system | |
| KR102635600B1 (en) | Battery formation device, control method of battery formation device, and control system | |
| CN215244378U (en) | Variable voltage platform charge-discharge system and car | |
| CN215120160U (en) | Bus voltage self-adaptive emergency power supply system | |
| CN211790810U (en) | Charging system, charger, battery pack and movable platform | |
| CN210380317U (en) | Combined energy storage power station | |
| CN220273331U (en) | Parallel charging and discharging device and multi-battery energy storage system thereof | |
| CN219717931U (en) | Energy storage system with multiple batteries charged and discharged in parallel and charging and discharging device | |
| CN111293755B (en) | Protection circuit for equalizing discharge of parallel battery pack and chargeable device | |
| CN103208836A (en) | Outdoor solar lithium battery energy storage device | |
| CN220570346U (en) | Power storage device, energy storage unit and power supply system with multiple storage battery modules connected in series | |
| CN214607166U (en) | Shared energy storage system with equalization circuit structure | |
| CN218769703U (en) | Lithium battery | |
| CN216959380U (en) | Energy storage battery protection system for taking electricity through battery direct current side | |
| KR102068313B1 (en) | Apparatus for battery life extension using LDC including auxiliary circuit | |
| RU222970U1 (en) | Uninterruptible DC power supply | |
| CN212162838U (en) | Battery equalization management circuit | |
| CN215378479U (en) | Portable UPS power supply | |
| CN203119563U (en) | Household direct-current energy storage equipment for photovoltaic lithium batteries | |
| CN211556924U (en) | Large-capacity quick-charging power supply system | |
| CN219843450U (en) | Charging and discharging control circuit, power supply circuit and energy storage device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |