CN218633362U

CN218633362U - Lithium battery same-port charging and discharging device

Info

Publication number: CN218633362U
Application number: CN202220854315.2U
Authority: CN
Inventors: 余勇; 王文彬
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-04-12
Filing date: 2022-04-12
Publication date: 2023-03-14
Anticipated expiration: 2032-04-12

Abstract

The utility model discloses a lithium battery is with mouthful charging and discharging device, including lithium battery is with mouthful circuit of dashing and discharging, lithium battery is with mouthful circuit of dashing and discharging including well accuse unit, charging circuit, charge protection circuit, lithium cell group and charge-discharge interface circuit, and well accuse unit loops through charging circuit and charge protection circuit and lithium cell group electric connection, still includes discharge circuit, lithium cell group links to each other with charge-discharge interface circuit through discharge circuit, and discharge circuit only allows the one-way flow of current to charge-discharge interface circuit of lithium cell group; the utility model discloses a storage battery can realize the charging and discharging process of battery through same charge-discharge interface circuit for circuit structure is simpler, reliable, has reduced port and electronic components's use amount, greatly reduced manufacturing cost.

Description

Lithium battery same-port charging and discharging device

Technical Field

The utility model belongs to the technical field of the lithium cell technique and specifically relates to a lithium cell is with mouthful charge-discharge device.

Background

A battery is an electronic component widely used in the industrial field, and among various batteries, a lithium battery is increasingly recognized by users due to its characteristics such as high cell voltage, high energy density, small size, light weight, long cycle life, no memory effect, and the like. Although the voltage of a single lithium battery can reach 4.2V, the single lithium battery can not meet the requirement in many occasions, so that a single lithium battery is required to be combined into a lithium battery pack with the voltage and the capacity meeting the use requirement in a series-parallel connection mode. The technology for charging the lithium battery pack is developed.

At present, lithium battery starting storage batteries used by most equipment are charged and discharged through different ports, such as a generator, a farming machine, a mountain drill and the like, so-called lithium batteries for charging and discharging through different ports are used for charging and discharging lithium batteries, and therefore the circuit structure is complex, the used electronic components are more, the cost is high, and the size is large. The situation of interface insertion error can also occur, which affects the use of the equipment.

SUMMERY OF THE UTILITY MODEL

Complicated, the high technical problem of cost to different mouthful of charge-discharge lithium battery circuit structure of tradition, the utility model provides a lithium cell is with mouthful charge-discharge device.

The utility model adopts the technical proposal that: lithium cell is with mouthful towards discharge circuit, including well accuse unit, charging circuit, charge protection circuit, lithium cell group and charge and discharge interface circuit, well accuse unit loops through charging circuit and charge protection circuit and lithium cell group electric connection, still includes discharge circuit, lithium cell group links to each other with charge and discharge interface circuit through discharge circuit, and discharge circuit only allows the one-way flow direction of current to charge and discharge interface circuit of lithium cell group. The charging protection circuit comprises a charging protection plate, an MOS tube and a sampling resistor are arranged on the charging protection plate, when the charging and discharging interface circuit is externally connected with a power supply, namely, a storage battery pack is charged, current charges the storage battery pack through the charging protection plate, the sampling resistor on the charging protection plate collects the voltage value of the storage battery in real time, and when the voltage of the storage battery, which is collected by the sampling resistor, reaches the rated voltage, the MOS tube is controlled by a central control unit to cut off the current, so that the storage battery is prevented from being damaged or exploded due to overshoot, and the charging of the storage battery is completed; when the charge-discharge interface circuit is externally connected with a load, namely the discharge process of the storage battery pack, the current discharges the load connected with the charge-discharge interface circuit through the discharge circuit. It can be seen that the utility model discloses a storage battery can realize the charging and discharging process of battery through same charge-discharge interface circuit for circuit structure is simpler, reliable, has reduced port and electronic components's use amount, greatly reduced manufacturing cost.

Further, the discharge circuit comprises a plurality of diodes connected in parallel, and as is known, the diodes can be used as switches and have unidirectional conductivity, and just because of the unidirectional conductivity of the diodes, during the charging process of the storage battery, the current does not reach the storage battery through the diodes, that is, the current does not charge the storage battery through the discharge circuit. If no diode is arranged, the discharge circuit does not have one-way conductivity, the current can directly charge the storage battery pack through the discharge circuit without protection, and the storage battery is finally charged and exploded.

Furthermore, the diode is a schottky diode, the schottky diode has the advantages of high switching frequency, reduced forward voltage and the like, and other diodes have higher voltage drop and short service life.

Further, the lithium battery pack includes three lithium batteries connected in series with each other.

Further, the central control unit comprises a control chip, and the control chip is STM32F103CBT6.

Lithium cell is with mouthful charge-discharge device for install foretell lithium cell and be mouthful towards the circuit of putting, including the case lid of box and openable box, the surface of box is provided with charge-discharge interface, and the lithium cell is with mouthful towards the circuit of putting and arranges in the box, charge-discharge interface with mouthful towards circuit electric connection. The box body can well play the effects of fire prevention, water prevention and sealing, and plays a role in protecting electronic components in the box body.

Furthermore, a plurality of slots are arranged in the box body, and battery boxes for placing lithium batteries are arranged in the slots. Current lithium battery protection case has functions such as waterproof, fire prevention, sealed, and its material is the iron system, built-in lithium cell, portability cooperation unmanned aerial vehicle outdoor operations. Since the lithium battery has a risk of high-temperature expansion and explosion under the conditions of collision deformation or damp short circuit, great care is required in the outdoor transportation process. Although the existing battery protection box is waterproof and sealed, all lithium batteries are placed in the same space, if one lithium battery changes, the appearance of the protection box cannot be observed in real time, and if the lithium batteries are not treated in time, the whole number of the lithium batteries in the box is damaged. Therefore the utility model discloses set up a plurality of battery casket in the box, can settle each lithium cell respectively in the battery casket fixedly, the battery casket cartridge has improved the security performance of lithium cell guard box in order to keep apart the protection lithium cell in the slot.

Furthermore, a temperature sensor and a pressure sensor are arranged in the battery box, an alarm electrically connected with the temperature sensor and the pressure sensor is arranged on the box cover, the temperature sensor can monitor the temperature change of the storage battery in each battery box in real time, and when the temperature reaches a set value, an operator is reminded to process the storage battery in time through the alarm on the box cover. The pressure sensor can monitor the expansion condition of the storage battery in the battery box in real time, and when the storage battery expands and extrudes until the pressure sensor reaches a set value, an alarm on the box cover reminds an operator to process the storage battery in time.

Further, the alarm comprises a warning lamp and a buzzer which are arranged on the box cover. The two alarms synchronously remind an operator of timely performing corresponding processing on the storage battery, the warning lamp visually reminds the operator, and the buzzer aurally reminds the operator.

Furthermore, the battery box is made of explosion-proof heat insulation materials, and can play a good role in protecting and isolating the storage battery in the battery box.

The beneficial effects of the utility model are that:

1. the utility model discloses a storage battery can realize the charge and the discharge process of battery through same charge-discharge interface circuit for circuit structure is simpler, reliable, has reduced port and electronic components's use amount, greatly reduced manufacturing cost.

2. The utility model discloses a but the temperature variation condition and the inflation variation condition of battery in the temperature sensor and the pressure sensor real-time detection battery casket, the alarm on the rethread case lid reminds operating personnel in time to make corresponding processing to the battery that changes, avoids arousing accident, has improved the security.

Drawings

Fig. 1 is a schematic block diagram of the lithium battery simultaneous punching and discharging circuit of the present invention.

Fig. 2 is a charging circuit diagram of the lithium battery simultaneous charging and discharging circuit of the present invention.

Fig. 3 is a discharge circuit diagram of the same-opening punching and discharging circuit of the lithium battery of the present invention.

Fig. 4 is a schematic structural diagram of the lithium battery same-port charging and discharging device of the present invention.

Fig. 5 is a schematic structural diagram of the box body of the present invention.

Labeled as: 1. a charging protection board, 2. A storage battery pack; 3. a diode; 4. a box body; 5. a battery pack; 6. a charge-discharge interface; 7. a slot; 8. a battery cartridge; 9. a lithium battery; 10. a warning light; 11. a buzzer; 12. a handle.

Detailed Description

In the description of the present invention, it should be noted that the terms "front face", "upper", "lower", "left", "right", "vertical", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The present invention will be further explained with reference to the accompanying drawings.

Example one

Referring to fig. 1, the utility model discloses a lithium cell is with mouthful circuit that dashes and discharges, including well accuse unit, charging circuit, charge protection circuit, lithium cell group and charge-discharge interface circuit, well accuse unit loops through charging circuit and charge protection circuit and lithium cell group electric connection, still includes discharge circuit, lithium cell group links to each other with charge-discharge interface circuit through discharge circuit, and discharge circuit only allows the one-way flow direction of electric current to charge-discharge interface circuit of lithium cell group. The charging protection circuit comprises a charging protection plate 1, an MOS (metal oxide semiconductor) tube and a sampling resistor are arranged on the charging protection plate 1, the charging protection circuit is mature and common equipment in the prior art, when a charging and discharging interface circuit is externally connected with a power supply, namely a storage battery pack is charged, the storage battery pack 2 is charged by current through the charging protection plate, the sampling resistor on the charging protection plate collects the voltage value of the storage battery in real time, and when the voltage of the storage battery collected by the sampling resistor reaches a rated voltage, the MOS tube is controlled to cut off the current through a central control unit, so that the charging of the storage battery is completed; when the charge-discharge interface circuit is externally connected with a load, namely the discharge process of the storage battery pack, the current discharges the load connected with the charge-discharge interface circuit through the discharge circuit. It can be seen that the utility model discloses a storage battery can realize the charging and the discharge process of battery through same charge-discharge interface circuit for circuit structure is simpler, reliable, has reduced port and electronic components's use amount, greatly reduced manufacturing cost.

Referring to fig. 2 and 3, the discharging circuit of the present embodiment includes a plurality of diodes connected in parallel, and as is well known, the diodes can be used as switches and have unidirectional conductivity, and just because of the unidirectional conductivity of the diodes, during the charging process of the storage battery, the current does not reach the storage battery through the diodes, that is, the current does not charge the storage battery through the discharging circuit. If no diode is arranged, the discharge circuit does not have one-way conductivity, the current can directly charge the storage battery pack through the discharge circuit without protection, and the storage battery is finally charged and exploded. The number of diodes depends on the load connected.

The diode of the embodiment is a schottky diode, which has the advantages of high switching frequency, reduced forward voltage, and the like, and other diodes have higher voltage drop and short service life.

The lithium battery pack of the present embodiment includes three lithium batteries connected in series with each other.

The central control unit of the embodiment comprises a control chip, and the control chip is STM32F103CBT6.

Charging principle: referring to fig. 2, when the charging and discharging interface circuit is in a charging state when being externally connected with a power supply, the current charges the storage battery pack 2 through the charging protection board 1, the sampling resistor on the charging protection board collects the voltage value of the storage battery in real time, and when the sampling resistor collects that the voltage of the storage battery reaches the rated voltage, the central control unit controls the MOS transistor to cut off the current, so that the storage battery is charged. At this time, even if the power is continuously supplied, no current flows to the storage battery, and the storage battery is protected.

The discharge principle is as follows: referring to fig. 3, when the charge-discharge interface circuit is externally connected to a load, the charge-discharge interface circuit is in a discharge state, and the current discharged from the battery discharges the load connected to the charge-discharge interface circuit through the discharge circuit.

In summary, since the diode on the discharge circuit has unidirectional conductivity, in a charging state, the current of the external power supply does not charge the storage battery through the discharge circuit, and only charges the storage battery through the charging point circuit, and the charging protection circuit on the charging protection board can charge and protect the storage battery. Under the discharge state, the electric current of battery supplies with external load through discharge circuit's diode, consequently the utility model discloses a storage battery can realize the charge and the discharge process of battery through same charge-discharge interface circuit for circuit structure is simpler, reliable, has reduced port and electronic components's use amount, greatly reduced manufacturing cost.

Example two

Referring to fig. 4, the lithium battery same-opening charging and discharging device of the embodiment is used for installing the lithium battery same-opening charging and discharging circuit of the first embodiment, and comprises a box body 4 and a box cover 5 capable of opening and closing the box body 4, a charging and discharging interface 6 is arranged on the outer surface of the box body, the lithium battery same-opening charging and discharging circuit is arranged in the box body, the charging and discharging interface is electrically connected with the same-opening charging and discharging circuit, and a handle 12 is arranged at the top of the box body. The box body can well play the effects of fire prevention, water prevention and sealing, and plays a role in protecting electronic components in the box body.

Referring to fig. 5, in the present embodiment, a plurality of slots 7 are formed in the case 4, and battery cartridges 8 for accommodating lithium batteries 9 are formed in the slots 7. Current lithium battery protection case has functions such as waterproof, fire prevention, sealed, and its material is the iron system, installs the lithium cell in, and portability cooperation unmanned aerial vehicle outdoor operations. Since the lithium battery has a risk of high-temperature expansion and explosion under the conditions of collision deformation or moisture short circuit, great care is required in the outdoor transportation process. Although the existing battery protection box is waterproof and sealed, all lithium batteries are placed in the same space, if one lithium battery changes, the appearance of the protection box cannot be observed in real time, and if the lithium batteries are not treated in time, the whole number of the lithium batteries in the box is damaged. Therefore the utility model discloses set up a plurality of battery casket in the box, can settle each lithium cell respectively in the battery casket fixedly, the battery casket cartridge has improved the security performance of lithium cell guard box in order to keep apart the protection lithium cell in the slot.

The battery box 8 of the embodiment is internally provided with a temperature sensor (not shown in the figure) and a pressure sensor (not shown in the figure), the box cover is provided with an alarm which is electrically connected with the temperature sensor and the pressure sensor, the temperature sensor can monitor the temperature change of the storage battery in each battery box in real time, and when the temperature reaches a set value, the alarm on the box cover reminds an operator to process in time. The pressure sensor can monitor the expansion condition of the storage battery in the battery box in real time, and when the storage battery expands and extrudes until the pressure sensor reaches a set value, an alarm on the box cover reminds an operator to process the storage battery in time.

Referring to fig. 4, the alarm of the present embodiment includes a warning lamp 10 and a buzzer 11 provided on the cover. The two alarms synchronously remind an operator of timely performing corresponding processing on the storage battery, the warning lamp visually reminds the operator, and the buzzer aurally reminds the operator.

The battery case 8 of this embodiment is made of an explosion-proof heat insulating material, and can protect and insulate the secondary battery therein well.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The same-opening charging and discharging device for the lithium battery is characterized by comprising a box body (4), a box cover (5) capable of opening and closing the box body (4) and a same-opening charging and discharging circuit for the lithium battery, wherein the same-opening charging and discharging circuit for the lithium battery is arranged in the box body, a charging and discharging interface (6) is arranged on the outer surface of the box body, and the charging and discharging interface is electrically connected with the same-opening charging and discharging circuit; the lithium battery is with mouthful towards the discharge circuit and is included well accuse unit, charging circuit, charge protection circuit, lithium cell group and charge and discharge interface circuit, and well accuse unit loops through charging circuit and charge protection circuit and lithium cell group electric connection, and lithium battery is with mouthful towards the discharge circuit still including discharge circuit, lithium cell group links to each other with charge and discharge interface circuit through discharge circuit, and discharge circuit only allows the one-way flow direction of current to charge and discharge interface circuit of lithium cell group, discharge circuit includes a plurality of parallelly connected diodes.

2. The lithium battery same-port charging and discharging device according to claim 1, wherein a plurality of slots (7) are formed in the box body (4), and battery boxes (8) for accommodating the lithium batteries (9) are formed in the slots (7).

3. The lithium battery same-port charge and discharge device according to claim 2, wherein a temperature sensor and a pressure sensor are provided in the battery case (8), and an alarm electrically connected to the temperature sensor and the pressure sensor is provided on the case cover.

4. The lithium battery same-port charging and discharging device according to claim 3, wherein the alarm comprises a warning lamp (10) and a buzzer (11) arranged on the box cover.

5. The lithium battery simultaneous charge and discharge device according to claim 2, wherein the battery cartridge (8) is made of explosion-proof heat insulating material.