CN203339775U - Energy storage system battery management device - Google Patents
Energy storage system battery management device Download PDFInfo
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- CN203339775U CN203339775U CN2013204470736U CN201320447073U CN203339775U CN 203339775 U CN203339775 U CN 203339775U CN 2013204470736 U CN2013204470736 U CN 2013204470736U CN 201320447073 U CN201320447073 U CN 201320447073U CN 203339775 U CN203339775 U CN 203339775U
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Abstract
The utility model discloses an energy storage system battery management device which comprises a battery module/battery box, a gathering line, an external balance circuit and a BMS without balance. A first interface and a second interface are arranged on the battery module/battery box. The gathering line gathers a signal of the battery module/battery box through the first interface and transmits the signal to the BMS without balance. The second interface is connected with a balance line. The balance line is connected with the battery module/battery box and the external balance circuit. According to the utility model, the data gathering line is separated from the balance line; the internal data gathering line is only used for gathering the conventional information of battery voltage, current, temperature and the like, while the balance line is led out through the second interface; when batteries needs to be maintained, the batteries are connected with the external balance circuit through the second interface for balance; when the inconsistency of the batteries exceeds a certain limit value, the external balance circuit is used to carry out battery maintenance; arranging a balance circuit in the battery management device is not needed; and the device has the characteristics of low cost and simple system architecture.
Description
Technical field
The utility model relates to a kind of energy-storage system battery management field, more specifically, relates to a kind of energy-storage system cell managing device that adopts external equalizing circuit to realize the off-line equalization function.
Background technology
Energy-storage system is comprised of battery, energy conversion system (Power Conversion System, PCS), battery management system (Battery Management System, BMS) and supervisory control system.Battery management system is a real-time monitoring system based on microprocessor; its major function is monitored and is protected battery; monitoring battery state (voltage, electric current and temperature etc.) effectively; the fault that may occur battery pack is reported to the police and is protected battery body, guarantees safe, reliable, the stable operation of battery pack.
At present, in electric automobile or large capacity energy-storage system application, normal lithium ion battery, lead-acid battery or other electrochemical energy storage battery of adopting, its main feature is that monomer voltage is low, capacity is little, as lithium-ion battery monomer voltage is 3.2V, common capacitance grade has the series such as 35/50/100/180Ah.For electric pressure 380V or 10kV, capacity hundred kWh or MWh apply, and need to adopt the battery series-parallel connection of thousands of joints.Inevitably bring a series of harmonious problems after a large amount of battery series/parallels, when reality is used, series battery is in the performance of the aspects such as capacity utilization, fail safe and life-span still far away from single battery, and its key problem is the inconsistency of battery pack.The inconsistency of battery pack is larger on the impact of its performance: in when charging, prior to other battery charging capacity of battery pack that has been full of electric part battery limitation, thereby cause the total memory capacity of battery pack and energy to reduce; Same, when electric discharge, the part battery limitation be discharged prior to other battery the discharge capacity of battery pack, thereby cause capacity and the energy of battery pack storage not to be fully used.Thereby be difficult to fail safe that the balance stack battery uses and the contradiction between high efficiency, " the wooden barrel effect " that the inconsistency of Here it is stack battery causes.
Battery management system, as the key link of battery management, can be monitored information such as battery cell voltage, electric current and temperature in real time, and be carried out accordingly the suitable control that discharges and recharges, thereby battery is effectively managed.Existing battery management system product mainly contains two types:
A kind of is not to be with equalization function, with balanced BMS, can not reduce battery performance and useful life.
Another kind is the band equalization function, and the equalizing circuit responsible in the BMS internal configurations carries out equilibrium to battery in real time, and the battery transfer part energy that voltage is high, to the low battery of voltage, can effectively reduce " wooden barrel effect " impact on whole battery system.With balanced BMS, need each piece battery all to configure equalizing circuit, greatly increased hardware cost and system complexity, the equal existent defect of this BMS of two types and deficiency.
In Fig. 1, the BMS that existing band is balanced and battery connected mode, wherein gather line and equilibrium line unites two into one, and there is complexity BMS inside and huge equalizing circuit.
The utility model content
Main purpose of the present utility model is to overcome the deficiency that existing battery management system exists aspect balanced, a kind of energy-storage system cell managing device is proposed, be specially and offer two separation interfaces on battery module/battery case, one is used for connecting the collection line for interface, another interface, for connecting harmony, guarantees that cell managing device is simple in structure, cost is low, performance is excellent.
To achieve these goals, the technical solution of the utility model is:
A kind of energy-storage system cell managing device, comprise battery module/battery case, gather line and not with balanced BMS, offer two interfaces on described battery module/battery case, be respectively first interface and the second interface, the signal that described collection line gathers battery module/battery case by first interface transfers to is not with balanced BMS, and described the second interface is for connecting equilibrium line.
Wherein said the second interface is the spininess interface, and the several border factually of interface pin cell number is determined.
The energy-storage system cell managing device also comprises external equalizing circuit, and described external equalizing circuit connects battery module/battery case by equilibrium line, and described equalizing circuit is two or more battery cells.
The existing battery management system with equalization function, will gather line and equilibrium line unites two into one, and when carry out data acquisition, also carry out battery balanced adjusting, therefore need in BMS, configure very complicated equalizing circuit.The utility model separates the data acquisition line concentration with equilibrium line, internal data gathers line only for the collection of the routine informations such as cell voltage, electric current, temperature, equilibrium line is drawn by the second interface, when battery needs to be serviced, by the second interface and the connection of external Equilibrium circuit, is undertaken balanced.When the inconsistency of battery surpasses a threshold value, utilize external equalizing circuit to carry out battery maintenance.Thereby guaranteed not simple with balanced BMS configuration.）
Above-mentioned cell managing device, when the battery consistency in battery module/battery case is better, external equalizing circuit does not connect, the battery normal operation, when the battery inconsistency operates a threshold value, external equalizing circuit is connected with battery module/battery case by the second interface, carries out equilibrium from outside and controls, after equilibrium completes, external equalizing circuit and battery disconnect.
This device adopts the spininess interface that battery cell/module both positive and negative polarity is drawn, and BMS itself does not configure equalizing circuit, but equalizing circuit is external, and the scale of equalizing circuit is two or more battery cells.
The equalizing circuit that equalizing circuit is any mode in resistance power consumption equalizing circuit, switching capacity equalizing circuit, bi-directional DC-DC current transformer equalizing circuit, multi winding transformer equalizing circuit, multimode switch selection equalizing circuit, switched inductors equalizing circuit, but be not limited to above-mentioned equalizing circuit.Wherein said resistance power consumption equalizing circuit is the equalizing circuit that adopts resistance power consumption method, the switching capacity equalizing circuit is for adopting the equalizing circuit of switching capacity method, bi-directional DC-DC current transformer equalizing circuit is the equalizing circuit that adopts bi-directional DC-DC current transformer method, the multi winding transformer equalizing circuit is the equalizing circuit that adopts the multi winding transformer equalization, it is to adopt the multimode switch to select the equalizing circuit of equalization that the multimode switch is selected equalizing circuit, and the switched inductors equalizing circuit is the equalizing circuit that adopts the switched inductors method.
Compared with prior art, the beneficial effects of the utility model are: the BMS itself in (1) cell managing device is not with equalization function, can greatly reduce costs, and reduces system complexity, improves the reliability of BMS; (2) the reserved concentrated battery management interface of battery module/battery case, when the inconsistency of battery surpasses a threshold value, utilize external balancer to carry out battery maintenance, thereby can effectively improve useful life and the performance of battery, contradiction that can not be unified between workout cost, complexity and battery performance; (3) after adopting unified external equalizing circuit, whole system only need to configure a set of small-sized equalizing circuit.
The accompanying drawing explanation
Fig. 1 is the existing BMS connecting circuit figure with equalization function.
Fig. 2 is the balanced interface schematic diagram of the utility model battery elementary cell.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described further, but execution mode of the present utility model is not limited to this.
As shown in Figure 2, this cell managing device comprises battery module/battery case, gather line and not with balanced BMS, offer two interfaces on described battery module/battery case, be respectively first interface and the second interface, the signal that described collection line gathers battery module/battery case by first interface transfers to is not with balanced BMS, described the second interface is for connecting equilibrium line, the second interface is the spininess interface, to gather line separates with equilibrium line, BMS itself is not with equalization function, thereby greatly reduce BMS cost and complexity, reserved one balanced mouthful by a spininess interface of equilibrium line, the several border factually of interface pin cell number is determined.When battery needs equilibrium, safeguarded by balanced mouth, thereby both can be realized equalization function, also can effectively reduce costs.
Above-described execution mode of the present utility model, do not form the restriction to the utility model protection range.Any modification of having done within spiritual principles of the present utility model, be equal to and replace and improvement etc., within all should being included in claim protection range of the present utility model.
Claims (4)
1. an energy-storage system cell managing device, it is characterized in that, comprise battery module/battery case, gather line and not with balanced BMS, offer two interfaces on described battery module/battery case, be respectively first interface and the second interface, the signal that described collection line gathers battery module/battery case by first interface transfers to is not with balanced BMS, and described the second interface is for connecting equilibrium line.
2. energy-storage system cell managing device according to claim 1, is characterized in that, described the second interface is the spininess interface.
3. energy-storage system cell managing device according to claim 1 and 2, it is characterized in that, described energy-storage system cell managing device also comprises external equalizing circuit, described external equalizing circuit connects battery module/battery case by equilibrium line, and described equalizing circuit is two or more battery cells.
4. energy-storage system cell managing device according to claim 3, it is characterized in that the equalizing circuit that described equalizing circuit is any mode in resistance power consumption equalizing circuit, switching capacity equalizing circuit, bi-directional DC-DC current transformer equalizing circuit, multi winding transformer equalizing circuit, multimode switch selection equalizing circuit, switched inductors equalizing circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013204470736U CN203339775U (en) | 2013-07-25 | 2013-07-25 | Energy storage system battery management device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013204470736U CN203339775U (en) | 2013-07-25 | 2013-07-25 | Energy storage system battery management device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203339775U true CN203339775U (en) | 2013-12-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013204470736U Expired - Lifetime CN203339775U (en) | 2013-07-25 | 2013-07-25 | Energy storage system battery management device |
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| CN (1) | CN203339775U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103401283A (en) * | 2013-07-25 | 2013-11-20 | 南方电网科学研究院有限责任公司 | Battery management device for energy storage system |
-
2013
- 2013-07-25 CN CN2013204470736U patent/CN203339775U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103401283A (en) * | 2013-07-25 | 2013-11-20 | 南方电网科学研究院有限责任公司 | Battery management device for energy storage system |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131211 |