CN221633456U - Battery power charging system and emergency starting power supply - Google Patents

Abstract

The utility model relates to the technical field of battery charging, in particular to a battery power supply charging system and an emergency starting power supply. The utility model discloses a battery power supply charging system and an emergency starting power supply, wherein the battery power supply charging system comprises a battery unit and a charging device, the battery unit comprises a plurality of electric cores which are sequentially connected in series, the charging device comprises a plurality of paths of charging circuits, the number of the charging circuits is the same as that of the electric cores, the plurality of paths of charging circuits are used for charging the plurality of electric cores respectively, and the plurality of paths of charging circuits are arranged in an isolated manner. The utility model realizes that the same voltage platform can be charged no matter how large the voltage difference of the battery cells is, so that the battery cells can not bulge, fire or even explode due to over-charging or over-discharging of a certain battery cell caused by the large voltage difference in the use process, and each battery cell is charged simultaneously, so that the charging speed is high; multiple chargers are not needed, and the operation is convenient.

Description

Battery power charging system and emergency starting power supply

Technical Field

The utility model belongs to the technical field of battery charging, and particularly relates to a battery power supply charging system and an emergency starting power supply.

Background

In the current automobile industry, automobiles generally use 12V starting batteries, and trucks generally use 24V starting batteries. Due to the aging of the battery, the situation that the vehicle cannot be started by the battery often occurs, and an emergency starting power supply is needed to assist in starting. In order to give consideration to emergency starting of automobiles and trucks, 12V/24V lithium ion emergency starting power supplies (7 ternary 3.7V battery cells are sequentially connected in series) appear on the market. When the DC power supply is used for emergency starting of an automobile, only 12V output (4 electric cores at the front section are used for discharging), and if the automobile is charged in time, only 16.8V DC is needed for charging the 4 electric cores at the front section. However, in the practical application process, charging cannot be performed once, long time can be separated, and even alternating use of 12V output and 24V output can occur, so that the voltage difference between the first 4 electric cores and the last 3 electric cores is large, and if each electric core cannot be pulled to the same platform voltage in time, the electric cores are easy to overcharge/overdischarge, and fire or explosion is caused. At this time, two DC chargers with different voltages of DC 16.8V and DC 12.6V are needed to charge the emergency starting power supply respectively, and the charging mode has the defects that 2 chargers are needed, the use cannot be mixed, the use is troublesome, the two chargers cannot work simultaneously, a part of the chargers are charged, and the charging time is doubled compared with the normal time.

Disclosure of Invention

The utility model aims to provide a battery power supply charging system and an emergency starting power supply for solving the technical problems.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the battery power supply charging system comprises a battery unit and a charging device, wherein the battery unit comprises a plurality of electric cores which are sequentially connected in series, the charging device comprises a plurality of paths of charging circuits, the number of the charging circuits is the same as that of the electric cores, the plurality of paths of charging circuits are used for respectively charging the plurality of electric cores, and the plurality of paths of charging circuits are mutually isolated.

Furthermore, the charging circuit is realized by adopting an isolated switching power supply circuit.

Furthermore, the isolated switching power supply circuit is of a flyback topology structure.

Furthermore, the output end of the charging circuit is connected with a charging indicator lamp in series.

Further, the anode and the cathode of the battery cells which are connected with each other are connected with the anode and the cathode of the corresponding charging circuit through the same lead.

Furthermore, the charging device also comprises a rectifying circuit, wherein the input ends of the multipath charging circuits are connected with the output ends of the rectifying circuits, and the input ends of the rectifying circuits are connected with alternating current input.

Furthermore, the input end of the rectifying circuit is connected with a fuse F1 in series, and the input end of the charging circuit is connected with a piezoresistor in parallel.

Further, the battery power supply is an emergency starting power supply with multiple voltage outputs.

Further, the battery cell is a lithium ion battery cell.

The utility model also discloses an emergency starting power supply, which is provided with the battery power supply charging system.

The beneficial technical effects of the utility model are as follows:

The utility model realizes that the same voltage platform can be charged no matter how large the voltage difference of the battery cells is, so that the battery cells can not bulge, fire or even explode due to over-charging or over-discharging of a certain battery cell caused by the large voltage difference in the use process, and each battery cell is charged simultaneously, so that the charging speed is high; multiple chargers are not needed, and the operation is convenient.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of the circuit connection of a battery cell according to an embodiment of the present utility model;

Fig. 2 is a circuit diagram of a charging device according to an embodiment of the present utility model.

Detailed Description

For further illustration of the various embodiments, the utility model is provided with the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments and together with the description, serve to explain the principles of the embodiments. With reference to these matters, one of ordinary skill in the art will understand other possible embodiments and advantages of the present utility model. The components in the figures are not drawn to scale and like reference numerals are generally used to designate like components.

The utility model will now be further described with reference to the drawings and detailed description.

As shown in fig. 1 and 2, a battery power charging system includes a battery unit and a charging device, where the battery unit includes a plurality of electric cells 1 sequentially connected in series, in this embodiment, the battery power is a vehicle emergency starting power source, and the battery unit includes 7 electric cells 1 (lithium ion electric cells) of 3.7V sequentially connected in series, and can output 12V power and 24V power, but not limited thereto, and in some embodiments, the number of electric cells 1 of the battery unit, the type of the electric cells 1, the voltage of the electric cells 1, and the like may be selected according to actual needs.

The charging device includes 7-way charging circuits 2, but is not limited thereto, and in some embodiments, the number of charging circuits 2 may be adjusted accordingly according to the number of the battery cells 1.

The 7-way charging circuit 2 is used for respectively charging 7 battery cells 1, the 7-way charging circuit 2 is mutually isolated, and short circuit of the charging circuit 2 is avoided, so that the 7-way charging circuit 2 can independently charge 7 battery cells 1 at the same time.

In this embodiment, the charging circuit 2 is implemented by using an isolated switching power supply circuit, and the output end of the charging circuit is isolated by a transformer, so that the charging circuit 2 is isolated from each other, and the charging circuit is simple in structure, easy to implement, high in safety and good in noise resistance, but is not limited thereto, and in some embodiments, the charging circuit 2 can also be implemented by using other power supply circuits.

Further, in this embodiment, the isolated switching power supply circuit is of a flyback topology structure, so that an inductance device can be omitted, and the circuit structure is simpler, but not limited thereto.

In this embodiment, the circuit structure of the 7-way charging circuit 2 is the same, and the first-way charging circuit 21 will be described below by taking the first-way charging circuit 21 as an example, the first-way charging circuit 21 is implemented by using a power chip U11 with a model ULP3792, the output voltage is 4.2V, the output ends BT1+ and BT 1-are respectively connected to the positive and negative poles B1 and B0 of the first battery core 1 (the battery core 1 at the far right in fig. 1), the first-way charging circuit 21 further includes devices such as an NMOS tube Q11, a transformer T11, rectifier diodes D14 and D15, and an electrolytic capacitor EC11, and the specific circuit connection structure is shown in fig. 2, which is not repeated, but in some embodiments, the first-way charging circuit 21 may also be implemented by using an isolated switching power circuit with other flyback topologies.

The positive output terminal BT1+ of the first path of charging circuit 21 is further connected in series to a charging indicator LED11 for indicating a charging condition. Specifically, the charging indicator light LED11 is an LED light, which has small volume, low energy consumption and long service life, but is not limited thereto, and in some embodiments, the charging indicator light LED11 may be implemented by other indicator lights.

In this embodiment, the input ends of the 7-way charging circuit 2 are respectively connected in parallel with piezoresistors RV11, RV21, RV31, RV41, RV51, RV61 and RV71, so as to perform anti-surge protection, thereby improving safety and reliability.

Further, in this embodiment, the charging device further includes a rectifying circuit BD1, and the input ends of the 7-way charging circuit 2 are connected to the output end of the rectifying circuit BD1, and the input ends ac_l and ac_n of the rectifying circuit BD1 are connected to AC inputs.

Preferably, in the present embodiment, the rectifying circuit BD1 is a full-bridge rectifying circuit formed by four rectifying diodes, which has a good rectifying effect and low energy consumption, but the present invention is not limited thereto, and in some embodiments, the rectifying circuit BD1 may be implemented by other rectifying circuits.

In this embodiment, the input terminal ac_l of the rectifying circuit BD1 is connected in series with a fuse F1 for overcurrent protection, so as to further improve safety and reliability.

Preferably, in this embodiment, the positive and negative electrodes of the interconnected battery cells 1 are connected with the positive and negative output ends of the corresponding charging circuit 2 through the same conductive wire 3, as shown in fig. 1 and 2, and by adopting this structure, the number of conductive wires and pins can be reduced, so that the structure is simple, easy to implement, and the cost is reduced.

In this embodiment, the charging device is integrated with the battery unit, that is, the charging device is integrated inside the battery power supply, so that charging is more convenient, and only one ac input interface needs to be reserved, so that the structure is simpler, the implementation is easy, and the cost is low, but the charging device is not limited to this.

The utility model also discloses an emergency starting power supply, which is provided with the battery power supply charging system.

During charging, the input end of the charging device is connected with an alternating current power supply, the alternating current power supply is rectified into a direct current power supply through a rectifying circuit BD1 and then supplies power to 7 paths of charging circuits 2, the 7 paths of charging circuits 2 respectively convert the direct current power supply into 4.2V direct current power supplies and then charge 7 electric cores 1 respectively, so that the 7 electric cores 1 are charged independently at the same time, the same voltage platform can be charged no matter how large the voltage difference of the electric cores 1 is, so that bulges, fires and even explosions are not generated due to over-charging or over-discharging of one electric core 1 caused by large voltage difference in the use process, and each electric core 1 is charged simultaneously, so that the charging speed is high; multiple chargers are not needed, and the operation is convenient.

While the utility model has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims (10)

1. The utility model provides a battery power charging system, includes battery cell and charging device, and battery cell includes a plurality of electric cores of serial connection in proper order, its characterized in that: the charging device comprises a plurality of paths of charging circuits, the number of the charging circuits is the same as that of the battery cores, the plurality of paths of charging circuits are used for respectively charging the plurality of battery cores, and the plurality of paths of charging circuits are mutually isolated.

2. The battery power charging system of claim 1, wherein: the charging circuit is realized by adopting an isolated switching power supply circuit.

3. The battery power charging system of claim 2, wherein: the isolation type switching power supply circuit is of a flyback topology structure.

4. A battery power charging system according to claim 3, wherein: and the output end of the charging circuit is connected with a charging indicator lamp in series.

5. The battery power charging system of claim 2, wherein: the positive and negative poles of the mutually connected battery cells are connected with the positive and negative output ends of the corresponding charging circuits through the same lead.

6. The battery power charging system of claim 1, wherein: the charging device further comprises a rectifying circuit, wherein the input ends of the multipath charging circuits are connected with the output ends of the rectifying circuits, and the input ends of the rectifying circuits are connected with alternating current input.

7. The battery power charging system of claim 6, wherein: the input end of the rectifying circuit is connected with a fuse F1 in series, and the input end of the charging circuit is connected with a piezoresistor in parallel.

8. The battery power charging system of claim 1, wherein: the battery power supply is an emergency starting power supply with multiple voltage outputs.

9. The battery power charging system of claim 8, wherein: the battery cell is a lithium ion battery cell.

10. An emergency starting power supply, which is characterized in that: a battery power charging system according to any one of claims 1 to 9.