CN206542226U - The fully charged safety control of totally-enclosed lead-acid battery group - Google Patents

Abstract

The utility model discloses a fully-enclosed lead-acid battery fully charged safety control device, which comprises at least two fully-enclosed lead-acid battery cells, and the top of the fully-enclosed lead-acid battery cell is provided with an air pressure equalization hole and a trachea connection nozzle , the air pipe connection nozzle is connected with an air pressure equalization tube, and a gas pressure sensor is installed on the top cavity of the air pressure equalization tube or a fully enclosed lead-acid battery cell, the gas pressure sensor is connected to the air pressure management module, and the output end of the air pressure management module is connected to a charging The module connects each fully enclosed lead-acid battery cell with the air pressure equalization tube through the air pipe connection nozzle, so as to achieve the pressure balance inside each battery cell in the whole battery. The air pressure of the air pressure management module can be set according to the battery capacity. When the detection value of the gas pressure sensor is greater than or equal to the air pressure setting value in the air pressure management module, the charging power supply is automatically cut off to achieve the purpose of charging management, and the structure is simple, reliable and effective.

Description

Fully-enclosed lead-acid battery fully charged safety control device

technical field

The utility model relates to a safety control device for fully charging a battery.

Background technique

At present, during the charging process of the sealed lead-acid battery, when the battery is close to being fully charged, the internal air pressure of the sealed battery will increase due to the side reaction of gas evolution in the battery. phenomenon, and even make the battery swell or explode. Battery charging generally controls the charging power through the terminal voltage level, because the internal gas evolution is not only related to the charging power but also to the temperature and battery aging degree, especially for the battery pack used in electric vehicles, real-time detection of the terminal voltage of each battery cell for charging Management and explosion-proof and explosion-proof management, the circuit structure is relatively complicated, so the method of detecting the battery terminal voltage to control the charging amount has certain defects.

Utility model content

The technical problem to be solved by the utility model is to provide a fully-enclosed lead-acid battery fully charged safety control device that can effectively control large current charging, reduce overpressure inside the battery, and improve battery life.

In order to solve the above-mentioned technical problems, the technical solution of the utility model is: a fully-enclosed lead-acid battery fully charged safety control device, including at least two fully-enclosed lead-acid battery cells, the top of the fully-enclosed lead-acid battery cell An air pressure equalization hole is provided, and an air pipe connection nozzle is installed on the air pressure equalization hole, and the air pipe connection nozzle is connected with an air pressure equalization pipe connecting the top cavities of each of the fully enclosed lead-acid battery monomers, and the air pressure equalization pipe Or a gas pressure sensor is installed on the top cavity of the fully enclosed lead-acid battery cell, the gas pressure sensor is connected to an air pressure management module, and the output end of the air pressure management module is connected to a charging module.

As a preferred technical solution, the trachea connection nozzle is extended toward the side of the fully enclosed lead-acid battery cell, and the top of the fully enclosed lead-acid battery cell is located directly below the air pressure equalization hole. connection notches.

As a preferred technical solution, the air pressure management module is fixed on the side wall of one of the fully enclosed lead-acid battery cells.

As a preferred technical solution, the fully enclosed lead-acid battery cells are respectively provided with safety exhaust valves.

Due to the adoption of the above technical scheme, the fully-enclosed lead-acid battery fully charged safety control device includes at least two fully-enclosed lead-acid battery cells, and the top of the fully-enclosed lead-acid battery cell is provided with an air pressure equalization hole, so A trachea connection nozzle is installed on the air pressure equalization hole, and the air pipe connection nozzle is connected with an air pressure equalization tube connecting the top cavities of each of the fully enclosed lead-acid batteries. The air pressure equalization tube or the fully enclosed lead-acid battery A gas pressure sensor is installed on the top cavity of the battery cell, and the gas pressure sensor is connected to the air pressure management module, and the output end of the air pressure management module is connected to the charging module; the beneficial effect of the utility model is: when in use, Several fully-enclosed lead-acid battery cells are connected in series and parallel and then installed into a group. Each fully-enclosed lead-acid battery cell is connected to the air pressure equalization pipe through the air pipe connection nozzle respectively, so as to reach the The pressure balance inside the acid battery cell and the pressure setting of the air pressure management module can be set and adjusted according to the battery capacity or voltage level. When the gas pressure sensor detects that the battery pack is charging, the pressure of the outgassing is greater than or equal to that in the air pressure management module. When the air pressure setting value is set, the charging power supply is automatically cut off to achieve the purpose of charging management. The structure is simple, reliable and effective.

Description of drawings

The following drawings are only intended to illustrate and explain the utility model schematically, and do not limit the scope of the utility model. in:

Fig. 1 is a schematic structural view of a fully enclosed lead-acid battery cell in an embodiment of the present invention;

Fig. 2 is a schematic structural view of a fully enclosed lead-acid battery unit in the embodiment of the present invention;

In the figure: 1-Fully enclosed lead-acid battery unit; 2-Positive pole assembly; 3-Negative pole assembly; 4- Air pipe connection nozzle; 5- Air pressure equalization tube; 6- Air pressure management module; .

detailed description

Below in conjunction with accompanying drawing and embodiment, further set forth the utility model. In the following detailed description, certain exemplary embodiments of the present invention are described by way of illustration only. Needless to say, those skilled in the art would realize that the described embodiments may be modified in various different ways, all without departing from the spirit and scope of the present invention. Accordingly, the drawings and description are illustrative in nature and not intended to limit the scope of the claims.

As shown in Fig. 1 and Fig. 2, the fully-enclosed lead-acid battery fully charged safety control device includes at least two fully-enclosed lead-acid battery cells 1, and the fully-enclosed lead-acid battery cells 1 are within the technical field The content well known to those of ordinary skill includes a casing filled with electrolyte, multiple positive plates and multiple negative plates soaked in the electrolyte, wherein each positive plate and the peripheral edge of each negative plate are provided with There is a guide body, the positive plate and the negative plate are arranged at intervals, and the adjacent plates are separated by an insulating diaphragm, the guide body on the positive plate is connected to the positive column assembly 2, and the guide body on the negative plate is connected to the negative column assembly 3 are connected, and the guide body is arranged on one long side of each positive plate and each negative plate, and the positive pole assembly 2 and the negative pole assembly 3 are equal, both of which are two. Each positive pole assembly 2 or negative pole assembly 3 includes a pole bolt, a pole nut, an insulating sheet, a plurality of pole shoes and a pole connecting plate, wherein a plurality of pole shoes are fixedly arranged on the pole connecting plate at intervals At the bottom, the adjacent pole shoes form a groove, the upper end of the guide body is inserted into the groove, the top of the guide body is fixedly connected with the pole connecting plate, the pole bolt is fixed on the upper end of the pole connecting plate, and the upper end of the pole bolt probes Out of the shell and separated from the shell by an insulating sheet, the pole nut is arranged on the pole bolt.

During the charging process of the fully enclosed lead-acid battery unit 1, when the fully enclosed lead-acid battery unit 1 is close to being fully charged, due to the side reaction of gas evolution in the fully enclosed lead-acid battery unit 1, the internal The air pressure gradually increases. In order to ensure the safe use of the battery, the gas pressure equalization tube 5 connecting the top cavities of each of the fully enclosed lead-acid battery cells 1 is connected to the air pipe connection nozzle 4 in this embodiment. A gas pressure sensor is installed on the tube 5 or the top cavity of the fully enclosed lead-acid battery cell 1, and the gas pressure sensor is connected to the air pressure management module 6, and the output end of the air pressure management module 6 is connected to a charging module. The charging module is well known to those skilled in the art, and is installed on existing electric vehicles to ensure safe charging of batteries in the electric vehicles.

The trachea connection nozzle 4 is extended toward the side of the fully enclosed lead-acid battery cell 1, and the top of the fully enclosed lead-acid battery cell 1 is located directly below the air pressure equalization hole and is provided with a connection recess for easy operation. The mouth 7 is convenient for installation, and can also accommodate the trachea connection nozzle 4, prevent it from being squeezed, and help to ensure the airtightness of the connection. In order to improve the safety of the storage battery, safety exhaust valves can also be correspondingly provided on the fully enclosed lead-acid battery cells 1 .

The air pressure management module 6 is fixed on the side wall of one of the fully enclosed lead-acid battery cells 1, the air pressure management module 6 includes an air pressure controller connected to the signal of the air pressure sensor, and the air pressure controller Connect to the charging module. The air pressure management module 6 is used to set the maximum air pressure value, which can be adjusted according to the capacity of the battery, and data lines and other facilities can be used for adjustment. The air pressure controller includes structures such as a microprocessor, a memory, and a system bus. Both the air pressure controller and the charging module are well-known to those skilled in the art, and will not be described in detail here.

The fully enclosed lead-acid battery cells 1 of this embodiment are correspondingly arranged in two rows, and the two rows of the fully enclosed lead-acid battery cells 1 form a group of fully enclosed lead-acid battery packs, and the two rows of the fully enclosed lead-acid battery cells The battery cells 1 are arranged in series, and each row is provided with at least two fully enclosed lead-acid battery cells 1, wherein the gas outlet ends of the air pipe connection nozzles 4 on one row of the fully enclosed lead-acid battery cells 1 correspond to It is arranged in the other row of fully enclosed lead-acid battery cells 1 , and the air pipe connection nozzles 4 on the other row of fully enclosed lead-acid battery cells 1 are respectively connected to the air pressure equalization tubes 5 . The fully-enclosed lead-acid battery packs are arranged at least in two groups, and the fully-enclosed lead-acid battery packs of each group are arranged in parallel. According to the rated mileage requirements of the electric vehicles produced by the enterprise, the fully-enclosed lead-acid battery packs can be freely selected the number of groups.

A control method for a fully-enclosed lead-acid battery fully charged safety control device mainly includes the following steps,

Step 1. Set the upper air pressure equalization hole on the top of the fully enclosed lead-acid battery cell 1, then install the air pipe connection nozzle 4 on the air pressure equalization hole, set an air pressure equalization pipe 5, and connect each of the air pipe connection nozzles 4 respectively Connected to the air pressure equalization pipe 5;

Step 2, installing a gas pressure sensor on the air pressure equalization tube 5 or the top cavity of the fully enclosed lead-acid battery cell 1;

Step 3: Fix the air pressure management module 6 on the side wall of one of the fully enclosed lead-acid battery cells 1, and connect the signal output end of the gas pressure sensor to the air pressure management module 6, and connect the air pressure management module 6 to the air pressure management module 6. The output end of the air pressure management module 6 is connected to the charging module;

Step 4, setting the air pressure setting value in the air pressure management module 6;

When the air pressure detection value of the gas pressure sensor is less than the air pressure setting value, the charging module remains in the charging state;

When the air pressure detection value of the gas pressure sensor is greater than or equal to the air pressure setting value, the air pressure management module generates a control signal and transmits it to the charging module, and the charging module disconnects the charging power supply and stops charging.

When the utility model is in use, several fully-enclosed lead-acid battery cells 1 are connected in series and parallel to form a group, and each fully-enclosed lead-acid battery cell 1 is connected together with the air pressure equalization pipe 5 through the air pipe connection nozzle 4 respectively. , to achieve pressure balance inside each fully enclosed lead-acid battery cell 1 in the whole battery. The pressure setting of the air pressure management module 6 can be set and adjusted according to the battery capacity or voltage level. When the gas pressure sensor detects that the battery When the pressure of degassing generated during group charging is greater than or equal to the air pressure setting value in the air pressure management module 6, the charging power supply is automatically cut off to achieve the purpose of charging management. The structure is simple, reliable and effective.

Through the safety control device of the utility model, during the charging process of the battery of an electric vehicle, no matter how much the charging current is or how much the ambient temperature is, when the battery is close to being fully charged, the internal pressure of the battery will gradually increase due to the side reaction of gas evolution in the battery. When the air pressure reaches the threshold set by the air pressure management module 6, the air pressure management module 6 sends a signal to the charging module, and the charging module is automatically disconnected from the charging power supply to prevent the internal air pressure of the battery from being too high and ensure the use of the battery safety, while maximizing the service life of the battery.

The basic principles, main features and advantages of the present utility model have been shown and described above. Those skilled in the art should understand that the utility model is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions only illustrate the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model The new model also has various changes and improvements, and these changes and improvements all fall within the scope of the claimed utility model. The scope of protection required by the utility model is defined by the appended claims and their equivalents.

Claims (4)

1. the fully charged safety control of totally-enclosed lead-acid battery group, including at least two totally-enclosed lead-acid battery monomers, its It is characterised by：The top of the totally-enclosed lead-acid battery monomer is provided with air pressure equalisation hole, the air pressure equalisation hole and is provided with gas Pipe connects mouth, and the tracheae connection mouth is connected with the air pressure equalisation of each totally-enclosed lead-acid battery monomer apex cavity connection Gas pressure sensor is installed on the apex cavity of pipe, the air pressure equalisation conduit or the totally-enclosed lead-acid battery monomer, institute State gas pressure sensor and be connected to air pressure management module, the output end of the air pressure management module is connected with charging module.

2. the fully charged safety control of totally-enclosed lead-acid battery group as claimed in claim 1, it is characterised in that：The gas The sidepiece that pipe connects mouth towards the totally-enclosed lead-acid battery monomer is extended, the totally-enclosed lead-acid battery monomer top position The connection recess for being arranged right below being easy to operation in the air pressure equalisation hole.

3. the fully charged safety control of totally-enclosed lead-acid battery group as claimed in claim 1, it is characterised in that：The gas Pressure management module is fixed on wherein described in one on the side wall of totally-enclosed lead-acid battery monomer.

4. the fully charged safety control of totally-enclosed lead-acid battery group as claimed in claim 1, it is characterised in that：It is described complete Safety exhaust is correspondingly provided with respectively on closing lead-acid battery monomer.