Storage battery grouping capacity-checking boost management device

Abstract

The utility model relates to the technical field of battery management, and particularly discloses a storage battery grouping capacity-checking boost management device, which comprises a storage battery pack, the storage battery pack comprises a plurality of battery groups, the storage battery pack is connected with a battery management unit, the battery management unit comprises four DC / DC power supply modules, and the four DC / DC power supply modules are connected with the storage battery pack. The positive electrode and the negative electrode of the storage battery pack are connected with a direct current bus, the direct current bus is connected with a plurality of chargers, the plurality of chargers are connected with an alternating current power supply, and the storage battery pack is connected with a battery detection unit; through the capacity checking boost management module, the battery group can have an automatic online capacity checking function, so that the DC / DC power supply module equipped for the battery group can carry out charging and discharging operation on the corresponding group, and finally the purpose of online automatic capacity checking of the storage battery pack is achieved. The condition that the whole battery group cannot supply power to the direct-current bus due to the fact that individual storage batteries break down is effectively prevented, and the effect of greatly improving the reliability and stability of power supply is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery management technical field, especially a kind of storage battery grouping nuclear capacity step-up management device. BACKGROUND

[0002] In power system operation, it is crucial to ensure the performance of storage batteries and stable power supply; in practical application, the following technologies are usually required for storage battery management device:

[0003] 1, nuclear capacity detection technology, for example professional battery capacity detection equipment, can accurately evaluate the actual capacity of storage battery;

[0004] 2, step-up conversion technology, such as high-performance DC / DC step-up converter, to realize the promotion of storage battery output voltage to meet the needs of different equipment;

[0005] 3, monitoring and management system, like intelligent battery monitoring software, real-time monitoring of various parameters of storage battery and effective management.

[0006] In many power systems, storage batteries play a key role as backup power supply.

[0007] However, during the implementation of the above technical solutions, at least the following technical problems are found: for example, when the AC power supply and charger fail, and an open-circuit fault occurs in a certain storage battery, the DC bus will be disconnected from the normal power supply circuit, thereby affecting the stability of the entire substation system. INVENTION CONTENTS

[0008] In view of the deficiencies of the prior art, the utility model provides a kind of storage battery grouping nuclear capacity step-up management device, solve when AC power supply, charger fails, and certain storage battery appears open-circuit fault, DC bus will be disconnected from normal power supply circuit, thereby affecting the stability of the entire substation system Technical problems.

[0009] To achieve the above purpose, the utility model is realized by the following technical solutions:

[0010] A kind of storage battery grouping nuclear capacity step-up management device, including storage battery group, storage battery group contains four battery groups, storage battery group is connected with battery management unit, battery management unit includes four DC / DC power modules, the positive and negative pole of storage battery group is connected with DC bus, DC bus is connected with multiple chargers, multiple chargers are connected with AC power supply, storage battery group is connected with battery detection unit.

[0011] Preferably, the battery detection unit includes a nuclear capacity step-up management module, a storage battery inspection module, and a storage battery whole group acquisition module.

[0012] Preferably, the nuclear capacity boosting management module, the storage battery inspection module and the storage battery whole group acquisition module are connected with a plurality of battery groups.

[0013] Preferably, the four battery groups are connected with four DC / DC power modules respectively.

[0014] Preferably, the battery management unit is connected with the DC bus.

[0015] Preferably, the four DC / DC power modules are connected in parallel.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] I. The battery group can realize automatic online nuclear capacity function through the nuclear capacity boosting management module, the DC / DC power module equipped in the battery group can implement charging and discharging operation on the corresponding group, the specific requirements of the battery group charging and discharging are accurately met, the target of online automatic nuclear capacity of the storage battery group is achieved, the battery group power supply characteristics of the nuclear capacity boosting management module connected with the battery group effectively prevent the condition that the whole battery group cannot supply power to the DC bus due to the fault of individual storage battery, when the AC power supply is in normal state, the DC power supply is supplied by the charger, when the AC power supply is powered off, the charging task of the charger is borne by the whole storage battery group, if the AC power supply is powered off and there is a single storage battery fault, then the other three battery groups without single storage battery fault can supply power to the DC bus by the DC / DC power module, thereby a redundant power supply system architecture with multiple battery group power supply channels for a battery group is built, and the reliability and stability of power supply are greatly improved.

[0018] II. The device has comprehensive storage battery monitoring function, the monitoring system is composed of the nuclear capacity boosting management module, the storage battery inspection module, the storage battery whole group acquisition module and the storage battery online monitoring host computer, adopts distributed design scheme, can accurately collect a plurality of key data of each battery, including voltage, internal resistance, connection strip internal resistance and temperature information, can also effectively collect the whole group voltage, charging and discharging current and environmental temperature of the battery group, can timely detect the possible safety hazards of the storage battery group in a short time, thereby providing strong support and reliable basis for guaranteeing the safe and stable operation of the storage battery group and even the whole power system, and the efficiency and safety of the whole power supply link are ensured. BRIEF DESCRIPTION OF DRAWINGS

[0019] The above description is only a summary of the technical scheme of the utility model, in order to more clearly understand the technical means of the utility model, and can be implemented according to the content of the specification, the following preferred embodiments of the utility model are described in detail with reference to the drawings.

[0020] Figure 1 The utility model discloses a connection schematic diagram.

[0021] Legend: 1, battery grouping; 2, DC bus; 3, DC / DC power module; 4, AC power supply; 5, charger; 6, nuclear capacity boost management module; 7, battery inspection module; 8, battery group acquisition module. DETAILED DESCRIPTION

[0022] The application embodiment provides a battery grouping nuclear capacity boost management module, effectively solves the technical problem that when AC power supply and charger appear faults and a certain battery grouping appears faults, the DC bus will be separated from the normal power supply circuit, and further influences the stability of the whole circuit system; the battery grouping can be automatically online nuclear capacity by the nuclear capacity boost management module, the DC / DC power module equipped in the battery grouping can implement charging and discharging operation on the corresponding grouping, accurately meets the specific requirements of battery grouping charging and discharging, and finally achieves the goal of online automatic nuclear capacity of the battery group; the battery grouping supply characteristics of the nuclear capacity boost management module connected with the battery grouping effectively prevent the condition that the whole battery grouping cannot supply power to the DC bus due to faults of individual batteries; when the AC power supply is in the normal state, the charger supplies the DC power supply; when the AC power supply is powered off, the whole battery group bears the supply task of the charger; if the AC power supply is powered off and there is a single battery fault, then the other three battery groupings without single battery fault can supply power to the DC bus by the DC / DC power module, thereby constructing a redundant power supply system architecture with multiple battery grouping supply channels for a battery grouping, and the reliability and stability of power supply are greatly improved; the device has comprehensive battery monitoring function, and the monitoring system is composed of the nuclear capacity boost management module, the battery inspection module, the battery group acquisition module and the battery online monitoring host; the distributed design scheme can accurately collect multiple key data of each battery, including voltage, internal resistance, connection strip internal resistance and temperature information, and can also effectively collect the group voltage, charging and discharging current and environmental temperature of the battery grouping, so that the possible safety hazards of the battery group can be detected in a short time, thereby providing strong support and reliable basis for ensuring the safe and stable operation of the battery group and the whole power system, and the efficient and safe effect of the whole power supply link is achieved. EMBODIMENT

[0023] As Figure 1As shown, the technical scheme in the embodiment of the application effectively solves the technical problem that when the AC power supply and the charging machine fail and a certain battery group fails, the DC bus will be disconnected from the normal power supply circuit, thereby affecting the stability of the entire substation system, and the general idea is as follows:

[0024] In view of the problems in the prior art, the utility model provides a kind of battery grouping nuclear capacity boost management device, including battery pack, battery pack contains four battery groups 1, battery pack is connected with battery management unit, battery management unit includes four DC / DC power module 3, the positive and negative pole of battery pack is connected with DC bus 2.

[0025] DC bus 2 is connected with two charging machines 5, multiple charging machines 5 are connected with AC power supply 4, battery pack is connected with battery detection unit, battery detection unit includes nuclear capacity boost management module 6, battery inspection module 7 and battery whole group acquisition module 8.

[0026] Nuclear capacity boost management module 6, battery inspection module 7 and battery whole group acquisition module 8 are connected with four battery groups 1, four battery groups 1 are connected with four DC / DC power module 3, battery management unit is connected with DC bus 2, and four DC / DC power module 3 are mutually connected in parallel.

[0027] Battery group 1: multiple battery groups 1 are constructed into a battery pack, for supplying power to DC bus 2;

[0028] DC bus 2: connected with battery pack and charging machine 5, responsible for transmitting power, for stable power supply for external power equipment;

[0029] DC / DC power module 3: connected with corresponding battery group 1 of battery pack, implements charge-discharge operation to battery group 1;

[0030] AC power supply 4: connected with charging machine 5, for supplying power for charging machine 5;

[0031] Charging machine 5: connected with DC bus 2 for supplying power for DC bus 2, converts AC power input by AC power supply 4 into DC power;

[0032] Nuclear capacity boost management module 6, battery inspection module 7 and battery whole group acquisition module 8 jointly constitute battery detection unit, for detecting battery group 1.

[0033] Working principle:

[0034] Firstly, the device enables the battery group 1 to automatically perform online capacity check by the capacity check and voltage boost management module 6. The device relies on the battery group management technology and operates under the precise control of the battery management unit. During the whole process, the system operation architecture remains stable, and the system loop switch switching operation is not required. The device can sequentially perform automatic online capacity check on the battery group 1 one by one. The capacity check is performed on one battery group 1 at a time. In this way, it can ensure that the battery group 1 is not lower than 75% of the rated capacity of the battery group at any time. The capacity check operation does not interfere with the normal operation of the DC system, effectively ensuring the stability and reliability of the DC bus 2. The DC / DC power supply module 3 equipped in the battery group 1 can perform charging and discharging operation on the corresponding group, accurately meet the specific requirements of the battery group 1 charging and discharging, and ultimately achieve the goal of online automatic capacity check of the battery group.

[0035] Secondly, the device has excellent continuous power supply capability of the DC bus 2. The battery group 1 supply characteristics of the capacity check and voltage boost management module 6 connected to the battery group 1 effectively prevent the condition that the entire battery group 1 cannot supply power to the DC bus 2 due to the failure of individual batteries. When the AC power supply 4 is in normal state, the DC power supply is supplied by the charger 5. When the AC power supply 4 is off, the charger 5 supply task is undertaken by the entire battery group. If the AC power supply 4 is off and there is a single battery failure, at this time, the charger 5 and the battery group cannot provide power to the DC bus 2. Then, the other multiple battery groups 1 without single battery failure will deliver power to the DC bus 2 by means of the DC / DC power supply module 3, thereby building a redundant power supply system architecture with multiple battery group 1 power supply channels for a group of battery groups 1. This greatly improves the reliability and stability of power supply, and lays a solid foundation for the stable operation of the entire power system.

[0036] Thirdly, the device has comprehensive battery monitoring function, and the monitoring system is composed of the nuclear capacity boost management module 6, the battery inspection module 7, the battery group collection module 8 and the battery online monitoring host computer. The distributed design scheme can accurately collect a plurality of key data of each battery, including voltage, internal resistance, connection strip internal resistance and temperature information, and can also effectively collect the group voltage, charge and discharge current and environmental temperature of the battery group 1. In addition, the monitoring system also has a practical battery group balancing function. The nuclear capacity boost management module 6 has the function of detecting the health status of the battery group. It uses the battery grouping 1 management technology and carefully formulates the control strategy, and works under the effective control of the battery management unit. Through the start of each DC / DC power module 3 to implement short-time discharge and charging operation, the voltage change of the battery in this process can accurately determine the discharge capacity of the battery group. The online monitoring start mode of the battery health status is mainly based on the set trigger condition, and the monitoring process can also be automatically started according to the preset period. In this way, the possible safety hazards of the battery group can be detected in a short time, so as to provide strong support and reliable basis for the safe and stable operation of the battery group and the whole power system, and to take measures in advance to avoid a series of adverse consequences caused by battery failure.

[0037] Fourthly, the device can realize the online monitoring function of the battery group power supply loop connectivity and load carrying capacity. The principle is to control the DC / DC power module 3 to activate each DC / DC power module 3 to perform short-time discharge and charging action. In this process, according to the dynamic change of the loop current value, the connectivity of the battery group power supply loop and its load carrying capacity are effectively detected. The start mode of the battery group power supply loop connectivity and load carrying capacity online monitoring function is mainly based on the set specific trigger condition as the priority start basis, and also has the ability to automatically start monitoring according to the preset period, so as to ensure that the key performance status of the battery group power supply loop can be grasped in time and continuously, and accurate data support and protection are provided for the stable operation and maintenance of the whole power supply system.

[0038] In the fifth step, the device has the battery group 1 voltage equalization function, once the battery group voltage equalization degree exceeds the set standard, the device will automatically trigger each group of DC / DC power supply module 3 to carry out the charging and discharging operation, in this process, the battery group 1 with higher voltage performs the discharging operation, and the battery group 1 with lower voltage performs the charging operation, through this way, the equalization of the voltage of each battery group 1 can be quickly and accurately realized, the problems such as the performance decline, the service life shortening and the power supply instability of the storage battery caused by the voltage imbalance can be effectively avoided, the working efficiency and the reliability of the whole storage battery group are obviously improved, the service life of the storage battery group is prolonged, and the powerful power guarantee basis for the continuous and stable operation of the related equipment or system is provided.

[0039] Finally, it should be noted that: obviously, the above embodiments are only examples for clearly illustrating the utility model, and are not limited to the implementation mode. For ordinary skilled persons in the art, other different forms of changes or variations can be made on the basis of the above description. Here, it is not necessary and impossible to enumerate all the implementation modes. The obvious changes or variations derived therefrom are still within the protection scope of the utility model.

Claims

1. A battery grouping nuclear capacity boost management device comprising a battery pack, characterized by, The battery pack comprises four battery groups (1), the battery pack is connected with a battery management unit, the battery management unit comprises four DC / DC power modules (3), the positive and negative poles of the battery pack are connected with a DC bus (2), the DC bus (2) is connected with a plurality of chargers (5), two of the chargers (5) are connected with an AC power supply (4), and the battery pack is connected with a battery detection unit.

2. The battery pack group core capacity boost management device according to claim 1, wherein The battery detection unit comprises a nuclear capacity boost management module (6), a battery inspection module (7) and a battery group acquisition module (8).

3. A battery pack group core capacity boost management device as claimed in claim 2, characterized by, The nuclear capacity boost management module (6), the battery inspection module (7) and the battery group acquisition module (8) are all connected with the four battery groups (1).

4. The battery pack group SOC boost management device according to claim 1, characterized by, A plurality of the battery groups (1) are respectively connected with the four DC / DC power modules (3).

5. The battery pack group SOC boost management device according to claim 1, characterized by, The battery management unit is connected with the DC bus (2).

6. The battery pack nuclear capacity boost management device of claim 1, wherein, The four DC / DC power modules (3) are connected in parallel with each other.

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