Distributed storage battery charging and discharging control module

Abstract

The utility model relates to the technical field of storage battery charging and discharging control, and discloses a distributed storage battery charging and discharging control module which comprises a shell, a mounting cavity is formed in the inner wall of the shell, and the inner wall of the mounting cavity is fixedly connected with a circuit board, an anti-reverse parallel discharging module and a plurality of anti-reverse charging and discharging controllers. The outer wall of one side of the shell is fixedly connected with a storage battery socket, the outer wall of the other side of the shell is fixedly connected with a wiring terminal, and the storage battery socket, the wiring terminal, the anti-parallel discharging module and the anti-reverse charging and discharging controllers are all electrically connected with the circuit board. According to the distributed storage battery charging and discharging control module, different types of storage batteries and different batches of storage batteries can be mixed for use, the storage batteries do not need to be replaced in batches, and the use cost is effectively saved; for the scene of frequent tripping and outage in thunderstorm days, the working time of instrument equipment can be effectively prolonged, the service life of the storage battery is prolonged, and the operation and maintenance workload is greatly reduced through the distributed modular design.

Description

Technical Field

[0001] The utility model relates to the technical field of battery charge and discharge control, in particular to a distributed battery charge and discharge control module. Background Art

[0002] There are a large number of small and micro monitoring equipment rooms in industries such as earthquake, meteorology, environmental protection, and hydrogeological monitoring. They are powered by city electricity, solar energy, or wind power. To ensure the operation of the equipment in the event of a power outage (city power outage, sunset, rainy days, etc.), batteries need to be discharged to maintain the continuous operation of the equipment. Currently, DC UPS or intelligent power supply equipment is mainly used to control the charging and discharging of batteries. The system mainly includes two parts: a UPS host or an intelligent power host and an external series-parallel battery pack. The host automatically controls the charging and discharging of the battery pack.

[0003] However, the following problems still exist in the current method of using a UPS host or an intelligent power host plus an external battery pack:

[0004] 1. Single battery type. The charge and discharge controller of the UPS host is single, and one host corresponds to a certain type of battery.

[0005] 2. Batteries need to be replaced in batches. External batteries are connected in series and parallel, and there is no isolation between them. During use, the internal resistance of each battery changes differently, and mutual charging is inevitable. To avoid mutual charging due to different internal resistances, battery replacement must be carried out in batches.

[0006] 3. Long charging time. The cooling fan will affect the quality of observation service data. In order to control the heat generated by charging, the host must limit the charging current, which will lead to a long charging time.

[0007] 4. Low reliability. Whether it is a UPS host or an intelligent power host, the battery charging and discharging control is centralized. If the charging and discharging control module fails, all connected batteries will not work properly. Utility Model Content

[0008] In view of the deficiencies in the prior art, the utility model provides a distributed battery charge and discharge control module.

[0009] The utility model provides the following technical solutions: a distributed battery charge and discharge control module, comprising a shell, an inner wall of the shell is provided with an installation cavity, the inner wall of the installation cavity is fixedly connected with a circuit board, an anti-reverse parallel discharge module and a plurality of anti-reverse charge and discharge controllers, an outer wall on one side of the shell is fixedly connected with a battery socket, and an outer wall on the other side of the shell is fixedly connected with a wiring terminal, wherein the battery socket, the wiring terminal, the anti-reverse parallel discharge module and the plurality of anti-reverse charge and discharge controllers are all electrically connected with the circuit board, and the battery socket, the wiring terminal, the anti-reverse parallel discharge module and the plurality of anti-reverse charge and discharge controllers are connected with each other.

[0010] Furthermore, a heat conducting plate is fixedly connected to the inner wall of the installation cavity, one side of the heat conducting plate is connected to a plurality of anti-reverse charge and discharge controllers, and the other side of the heat conducting plate is connected to the inner wall of the shell.

[0011] Furthermore, a mounting hole is provided on an outer wall of the housing on one side close to the heat conducting plate.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] This distributed battery charging and discharging control module can achieve the following effects through the above solution:

[0014] In view of the above-mentioned shortcoming 1, the utility model adopts a distributed battery charge and discharge controller. Each battery has its own independent charge and discharge controller, and can adjust the full charge voltage, MPPT voltage, and discharge protection voltage respectively, thereby solving the problem that the battery type can only be single;

[0015] In view of the above-mentioned shortcoming 2, the distributed battery charge and discharge controller used in the utility model has an anti-return circuit protection to achieve mutual isolation between batteries, prevent mutual charging between batteries, and thus solve the problem of battery packs needing to be replaced in batches;

[0016] In response to the above-mentioned shortcoming 3, the controller of each battery of the utility model adopts two small controllers in parallel (such as two 5A) as the controller of one battery, and every four small controllers are encapsulated into a pluggable battery connection module (which can connect two batteries). The number of connection modules is increased or decreased according to the number of batteries on site, so that the maximum charging current of each battery can reach 10A, reducing the heat generated by the controller and reasonably ensuring the heat dissipation surface, thereby shortening the time to fully charge.

[0017] In response to the above-mentioned shortcoming 4, after the utility model adopts distributed charging and discharging control, each battery has two small charging and discharging controllers. The failure of a single controller only reduces the charging current of this battery. The probability of both controllers of a battery being damaged is low, and even if two controllers are damaged at the same time, it will not affect the charging and discharging of other batteries.

[0018] Overall technical effect: Different types of batteries and different batches of batteries can be mixed and used, and the batteries do not need to be replaced in batches, which effectively saves the cost of use; shortening the battery charging time can effectively increase the working time of instruments and equipment and extend the service life of batteries in scenarios where power outages are frequent during thunderstorms. The distributed modular design also greatly reduces the workload of operation and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall appearance of the utility model;

[0020] Figure 2 This is a schematic diagram of the overall appearance of the utility model from another perspective;

[0021] Figure 3 This is a schematic diagram of the internal structure of the housing of the utility model;

[0022] Figure 4 This is a schematic diagram of the internal electrical connection of the utility model;

[0023] Figure 5 This is a schematic diagram of the module topology design of the utility model.

[0024] In the figure: 1. housing; 2. battery socket; 3. wiring terminal; 4. mounting hole; 5. mounting cavity; 6. circuit board; 7. anti-reverse parallel discharge module; 8. anti-reverse charge and discharge controller; 9. heat conduction plate. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0026] See also Figure 1-Figure 5 A distributed battery charge and discharge control module comprises a shell 1, an inner wall of the shell 1 is provided with an installation cavity 5, a circuit board 6, an anti-reverse parallel discharge module 7 and a plurality of anti-reverse charge and discharge controllers 8 are fixedly connected to the inner wall of the installation cavity 5, a battery socket 2 is fixedly connected to the outer wall on one side of the shell 1, and a wiring terminal 3 is fixedly connected to the outer wall on the other side of the shell 1, wherein the battery socket 2, the wiring terminal 3, the anti-reverse parallel discharge module 7 and the plurality of anti-reverse charge and discharge controllers 8 are all electrically connected to the circuit board 6, and the battery socket 2, the wiring terminal 3, the anti-reverse parallel discharge module 7 and the plurality of anti-reverse charge and discharge controllers 8 are connected to each other.

[0027] Please refer to Figure 1 A heat conducting plate 9 is fixedly connected to the inner wall of the mounting cavity 5 , one side of the heat conducting plate 9 is connected to a plurality of anti-reverse charge and discharge controllers 8 , and the other side of the heat conducting plate 9 is connected to the inner wall of the housing 1 .

[0028] Please refer to Figure 1 A mounting hole 4 is provided on the outer wall of the housing 1 close to the heat conducting plate 9 .

[0029] More specifically, the distributed battery charge and discharge control module is mainly composed of a small anti-reverse charge and discharge controller 8, an anti-reverse parallel discharge module 7, a circuit board 6, a battery socket 2, a terminal block 3, a heat conducting plate 9 and an encapsulated aluminum alloy housing 1;

[0030] Among them, the small anti-reverse charge and discharge controller 8 limits the maximum charging current of a single charge to within 5A to limit the heat generation. Mature products with MPPT voltage adjustable function can be purchased from the market. Two parallel connections provide complete intelligent charging management for one battery, including constant current charging stage, constant voltage charging stage and floating charging stage, and can perform trickle charging for deeply discharged batteries. The parallel connection of two small anti-reverse charge and discharge controllers 8 can expand the constant current charging current and improve the reliability of charging control; the adjustable MPPT voltage can improve the efficiency of solar charging, and each module can adjust the full charging voltage and overcharge voltage to achieve the connection of different types of batteries.

[0031] The anti-reverse parallel discharge module 7 uses a balanced parallel product on the market. On the one hand, it can isolate the batteries to prevent mutual charging between batteries. On the other hand, it can set the discharge protection voltage to achieve battery discharge protection. The module's built-in balancing function can also be used to achieve high-voltage batteries to be discharged first, and balanced discharge when the battery voltages are similar.

[0032] Battery socket 2 is used for external battery, and adopts Anderson 40A model. Although the current that can pass is greater than the actual requirement, the module size is convenient for access operation.

[0033] Terminal block 3 uses a D-SUB 4W4 30A connector, with 2 cores for charging current input and 2 cores for discharging current output.

[0034] Circuit board 6 is used for installation of each module and solidification of connection lines.

[0035] The heat conducting plate 9 is made of aluminum and is used to increase the heat dissipation area of ​​the charging controller and conduct heat to the aluminum alloy packaging shell 1.

[0036] The aluminum alloy packaging shell 1 is used for electrical safety protection and increases the heat dissipation area. The module is integrally formed and can be easily inserted into a standard rack-mounted chassis (a 2U chassis can be plugged with up to 10 modules and 20 batteries on one side), making later maintenance convenient.

[0037] Working process description:

[0038] 1) Battery charging: The charging current higher than the full-charge voltage of the battery (which can be a photovoltaic panel, a DC power supply suitable for charging, etc.) enters the input terminal of the charging controller through the D-SUB input terminal, and is output to the battery terminal 3 through the controller to charge the battery. The charging process is intelligently managed by the controller to achieve efficient and intelligent battery charging;

[0039] 2) Battery discharge: The anti-reverse parallel discharge module 7 is connected to the battery and the load end, which can prevent batteries of different voltages from charging each other, prevent the load end from backflowing to the battery, and realize balanced discharge of the battery until the discharge protection voltage.

[0040] 3) This module can realize the charging power supply to charge the battery and also supply power to the load end, but it is necessary to add a voltage stabilizing circuit at the load end to protect the load equipment.

[0041] Compared with the existing centralized charging and discharging control, the utility model fundamentally solves the problems of battery mutual charging, the need to replace faulty batteries in batches, the inability to mix different battery models, and the long battery charging time. It can extend the service life of the battery and reduce the user's cost. In the scenario of frequent power outages, the high charging efficiency can significantly extend the working time of the load equipment; because each battery has a redundant controller, the availability can be significantly improved; the distributed small controller effectively controls the charging heat, which is more conducive to energy conservation and emission reduction.

[0042] Finally, it is important to emphasize that:

[0043] 1) Distributed battery charging and discharging control circuit design in which each battery has an independent and redundant small controller.

[0044] 2) Two batteries share one module box, which is a module packaging method that is good for heat dissipation and convenient for installation in a standard chassis.

[0045] In addition, each battery can be equipped with an independent charge and discharge control board, a small charger can be configured in the charging circuit, and an anti-reverse diode can be added to the discharge circuit to achieve the same improvement effect.

[0046] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A distributed battery charge and discharge control module, comprising a housing (1), characterized in that: The inner wall of the housing (1) is provided with an installation cavity (5), the inner wall of the installation cavity (5) is fixedly connected with a circuit board (6), an anti-reverse parallel discharge module (7) and a plurality of anti-reverse charge and discharge controllers (8), the outer wall on one side of the housing (1) is fixedly connected with a battery socket (2), and the outer wall on the other side of the housing (1) is fixedly connected with a wiring terminal (3), wherein the battery socket (2), the wiring terminal (3), the anti-reverse parallel discharge module (7) and the plurality of anti-reverse charge and discharge controllers (8) are all electrically connected to the circuit board (6), and the battery socket (2), the wiring terminal (3), the anti-reverse parallel discharge module (7) and the plurality of anti-reverse charge and discharge controllers (8) are connected to each other.

2. A distributed battery charge and discharge control module according to claim 1, characterized in that: A heat conducting plate (9) is fixedly connected to the inner wall of the installation cavity (5); one side of the heat conducting plate (9) is connected to a plurality of anti-reverse charge and discharge controllers (8); and the other side of the heat conducting plate (9) is connected to the inner wall of the housing (1).

3. A distributed battery charge and discharge control module according to claim 2, characterized in that: An installation hole (4) is provided on the outer wall of the housing (1) on a side close to the heat conducting plate (9).

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