CN211957833U - Battery equalization repairing system - Google Patents

Abstract

The utility model provides a battery equalization repairing system, which comprises a battery pack, a main control module, an electric quantity detection chip, a stop switch and a bidirectional DC/DC module; the battery pack is connected with the electric quantity detection chip and the voltage detection module; each battery monomer in the battery pack is respectively connected with a cut-off switch, the bidirectional DC/DC module is connected with the battery pack through the cut-off switch, the bidirectional DC/DC module is respectively connected with the charging circuit or the discharging circuit, the charging circuit and the discharging circuit are connected or disconnected with the battery pack, and the main control module is connected with the electric quantity detection chip, the voltage detection module, each cut-off switch, the bidirectional DC/DC module, the charging circuit and the discharging circuit. The utility model discloses according to capacity difference or voltage difference between the battery, carry out balanced restoration to the battery, make the great free electric current of battery of difference flow to other battery monomer through two-way DC/DC module, restore the difference between the battery effectively, improved group battery performance and cycle life.

Description

A battery balance repair system

technical field

The utility model belongs to the technical field of battery balance, in particular to a battery balance repair system.

Background technique

The battery is used as a power source. The performance of the battery pack and whether the maintenance measures are appropriate are important factors that directly determine the service life and safety of the battery pack. Batteries are usually used in series and parallel to meet the requirements of voltage and energy storage capacity. Due to differences in the internal structure and working environment of the batteries, after the battery pack is used for a period of time, the state differences between the single cells gradually appear, resulting in undercharging of the single cells, Overcharging and overdischarging will affect the performance and service life of the battery pack, and pose a safety hazard.

Utility model content

In order to solve the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a battery balance repair system to overcome the defects in the prior art.

In order to achieve the above purpose, the utility model provides a battery balance repair system, which includes a battery pack, a main control module, a power detection chip, a charging circuit, a discharging circuit, a cut-off switch, a voltage detection module and a bidirectional DC/DC module; wherein, The battery pack is electrically connected to the power detection chip, and the power detection chip is electrically and signally connected to the main control module, so that the power detection chip obtains the power value of each battery cell in the battery pack and transmits the power value of all battery cells to the main control module; the battery pack is electrically connected to the voltage detection module, and the voltage detection module is electrically and signally connected to the main control module, so that the voltage detection module obtains the voltage value of each battery cell in the battery pack, and connects all the battery cells The voltage value of the battery is transmitted to the main control module; each battery cell in the battery pack is connected to a cut-off switch, and each cut-off switch is electrically and signally connected to the main control module, so that each cut-off switch is based on the main control module. The switch signal is forward-conducting charging or reverse-conducting discharging; the battery pack is electrically connected to the charging circuit and the discharging circuit respectively, and the charging circuit and the discharging circuit are respectively electrically connected and signally connected to the main control module, so that the main control module can be connected according to all battery cells. The power value or voltage value of the battery controls the conduction or disconnection between the charging circuit or the discharging circuit and the battery pack; the bidirectional DC/DC module is connected with the battery pack through the cut-off switch, and the bidirectional DC/DC module is respectively connected with the charging circuit or the discharging circuit, so as to The bidirectional DC/DC module balances the power of each battery cell in the battery pack.

Through the above technical solution, the power of the battery cell is detected by the power detection chip, and the voltage of the battery cell is detected by the voltage detection module, and the battery is balanced and repaired during the charging or discharging process according to the difference in capacity or voltage between the batteries. The battery cells with large differences are charged in forward conduction or discharged in reverse conduction through the cut-off switch, and the current of the battery cells with large differences flows to other battery cells through the bidirectional DC/DC module, which can effectively repair the battery. The difference between the battery packs improves the performance, safety performance and cycle life of the battery pack.

As a further description of the battery balance repair system of the present invention, preferably, when the main control module determines that the battery pack is in a low power state, the main control module controls the charging circuit to conduct with the battery pack, and the main control module controls each cutoff The switch is charging forward.

Through the above technical solutions, the battery pack can be charged.

As a further description of the battery balance repair system of the present invention, preferably, when the main control module determines that the battery cell with the maximum power and the battery cell with the minimum power in the battery pack have a power difference greater than a preset value, or the battery When the voltage difference between the cells is greater than the preset value, the main control module sequentially controls the cut-off switch connected to the battery cell with the maximum power or the maximum voltage to conduct reverse conduction and discharge, and at the same time the main control module controls the discharge circuit to conduct, reverse conduction. The current of the discharged battery cells flows to other battery cells through the bidirectional DC/DC module.

Through the above technical solution, during the charging process, the battery cells can be reduced in size by controlling the cut-off switch of the battery cells with power difference or voltage difference to conduct reverse conduction and discharging, and flow to other battery cells through the bidirectional DC/DC module. The difference in power between the two, to avoid overcharging the battery cell with the largest power.

As a further description of the battery balance repair system of the present invention, preferably, when the main control module judges that the battery pack is in a high power state, and the main control module judges that the battery pack has the battery cell with the maximum power and the battery with the minimum power When the power difference of the cells is greater than the preset value, the main control module controls the cut-off switch connected to the battery cell with the maximum power to conduct reverse conduction and discharge, and at the same time, the main control module controls the discharge circuit to conduct, and the reverse conduction and discharge of the battery cells are discharged. Current flows to other battery cells through bidirectional DC/DC modules.

Through the above technical solution, the reverse conduction discharge of the battery cells with the power difference or voltage difference is controlled, and the bidirectional DC/DC module flows to other battery cells, so as to avoid the over-discharge of the battery cells with the minimum power.

As a further description of the battery balance repair system of the present invention, preferably, when the main control module determines that the battery pack is in a high power state, the main control module regularly controls the discharge circuit to conduct with the battery pack.

Through the above technical solution, the battery pack is discharged to activate the activity of the battery pack.

As a further description of the battery balance repair system of the present invention, preferably, it further includes a temperature detection module, the temperature detection module is connected to the battery pack, and the temperature detection module is electrically and signally connected to the main control module, so that the temperature detection module is The module detects the temperature of the battery pack during the process of power balancing, and transmits the temperature of the battery pack to the main control module. When the temperature exceeds the preset value, the main control module controls the charging circuit or the discharging circuit to disconnect from the battery pack.

Through the above technical solutions, the safety of the battery pack is ensured.

The beneficial effects of the utility model: the utility model detects the electric quantity of the battery cell through the electric quantity detection chip, and the voltage detection module detects the voltage of the battery cell, and according to the capacity difference or voltage difference between the batteries, the battery is charged or discharged during the charging or discharging process. Carry out equalization repair. For the battery cells with large differences, the battery cells with large differences are charged in forward conduction or discharged in reverse conduction through the cut-off switch, and the current of the battery cells with large differences flows to other cells through the bidirectional DC/DC module. Effectively repair the difference between batteries, avoid the overcharge of the battery cell with the largest power or the over-discharge of the cell with the smallest power, and improve the performance, safety performance and cycle life of the battery pack.

Description of drawings

FIG. 1 is a schematic structural diagram of the battery balance repair system of the present invention.

Detailed ways

In order to be able to further understand the structure, features and other purposes of the present utility model, the following detailed description is now given in conjunction with the attached preferred embodiments and the accompanying drawings. The embodiments described in the accompanying drawings are only used to illustrate the technical solutions of the present utility model. The present invention is not limited.

First, please refer to FIG. 1 . FIG. 1 is a schematic structural diagram of a battery balance repair system of the present invention. As shown in Figure 1, a battery balance repair system of the present invention includes a battery pack 1, a main control module 2, a power detection chip 3, a charging circuit 4, a discharging circuit 5, a cut-off switch 6, a voltage detection module 8 and a bidirectional DC/DC module 9; wherein, the battery pack 1 is electrically connected to the power detection chip 3, and the power detection chip 3 is electrically and signally connected to the main control module 2, so that the power detection chip 3 obtains each battery cell in the battery pack 1. The battery pack 1 is electrically connected to the voltage detection module 8, and the voltage detection module 8 is electrically and signally connected to the main control module 2, so that the voltage detection The module 8 obtains the voltage value of each battery cell in the battery pack 1, and transmits the voltage values of all battery cells to the main control module 2; each battery cell in the battery pack 1 is connected to a cut-off switch 6, each The cut-off switches 6 are all electrically and signally connected to the main control module 2, so that each cut-off switch 6 is turned on or off according to the switch signal of the main control module 2; the battery pack 1 is electrically connected to the charging circuit 4 and the discharging circuit 5 respectively , the charging circuit 4 and the discharging circuit 5 are respectively electrically and signally connected to the main control module 2, so that the main control module 2 controls the charging circuit 4 or the discharging circuit 5 and the battery pack 1 to conduct charging or Disconnect reverse conduction discharge. Among them, the main control module 2 adopts common chips in the prior art, such as a single-chip microcomputer with a model of STC89C52, etc. to realize control; In the technology, a common device such as TP4056 can be used to charge the battery, the discharge circuit 5 is a common device that can discharge the battery in the prior art, such as the model MAX8731, and the cut-off switch 6 is a device in the prior art. The voltage detection module 8 adopts a common device such as HVD100 in the prior art that can realize the voltage detection function of the battery, and the bidirectional DC/DC module 9 can be obtained in the prior art.

The above structure detects the power of the battery cell through the power detection chip, and the voltage detection module detects the voltage of the battery cell, and according to the capacity difference or voltage difference between the batteries, the battery is balanced and repaired during the charging or discharging process. Through the cut-off switch, the battery cell of the battery cell will be charged in forward conduction or discharged in reverse conduction direction, and the current of the battery cell with large difference will flow to other battery cells through the bidirectional DC/DC module, which can effectively repair the difference between the batteries. , which improves battery pack performance, safety performance and cycle life.

When the main control module 2 judges that the battery pack 1 is in a low power state, it is satisfied that more than two-thirds of the battery cells are in a low power state or adjusted according to the actual situation, which is preset by the main control module 2, and the main control module 2 controls the charging circuit. 4 is turned on with the battery pack 1, and the main control module 2 controls each cut-off switch) to conduct forward charging, so as to charge the battery pack 1. If the main control module 2 determines that the power difference between the battery cell with the maximum power and the battery cell with the minimum power in the battery pack 1 is greater than the preset value, or when the voltage difference between the battery cells is greater than the preset value, the main control module 2 The control module 2 sequentially controls the cut-off switch 6 connected to the battery cell with the maximum power or the maximum voltage to conduct reverse conduction and discharge, while the main control module 2 controls the discharge circuit 5 to conduct, and the current of the reverse conduction and discharge battery cell passes through the bidirectional DC. The /DC module 9 flows to other battery cells. When the power difference between the two battery cells compared with each other is less than the preset value, the cut-off switch 6 is forwarded for charging, and the discharge circuit 5 is disconnected, so as to realize the charging process. , by controlling the cut-off switch of the battery cells with power difference or voltage difference to conduct reverse conduction and discharge, and flow to other battery cells through the bidirectional DC/DC module, to reduce the power difference between the battery cells and avoid the maximum power The battery cell is overcharged.

When the main control module 2 judges that the battery pack 1 is in a high power state, it is satisfied that more than two-thirds of the battery cells are in a high power state or adjusted according to the actual situation, which is preset by the main control module 2, and the main control module 2 judges the battery When the power difference between the battery cell with the maximum power and the battery cell with the minimum power in the group 1 is greater than the preset value, the main control module 2 controls the cut-off switch 6 connected to the battery cell with the maximum power to conduct reverse conduction and discharge, and the main control module 2 The control module 2 controls the discharge circuit 5 to be turned on, and the current of the reversely-discharged battery cells flows to other battery cells through the bidirectional DC/DC module 9, so as to realize the cut-off switch of the battery cells with power difference or voltage difference. Reverse conduction discharge and flow to other cells through the bidirectional DC/DC module to avoid overdischarge of the smallest battery cells.

In addition, when the main control module 2 determines that the battery pack 1 is in a high power state, the main control module 2 regularly controls the discharge circuit 5 to conduct with the battery pack 1 to discharge the battery pack 1 to activate the activity of the battery pack 1 .

As shown in FIG. 1 , the battery balance repair system further includes a temperature detection module 7, which is connected to the battery pack 1, and the temperature detection module 7 is electrically and signally connected to the main control module 2, so that the temperature detection module 7 is in the During the process of cell balancing, the temperature of the battery pack 1 is detected, and the temperature of the battery pack 1 is transmitted to the main control module 2. When the temperature exceeds the preset value, the main control module 2 controls the charging circuit 4 or the discharging circuit 5 to disconnect from the battery pack 1. to ensure the safety of battery pack 1. The temperature detection module 7 is a module commonly used in the prior art to detect battery temperature.

It should be stated that the above-mentioned contents and specific embodiments of the utility model are intended to prove the practical application of the technical solutions provided by the present utility model, and should not be construed as limiting the protection scope of the present utility model. Those skilled in the art can make various modifications, equivalent replacements or improvements within the spirit and principle of the present invention. The protection scope of the present invention is subject to the appended claims.

Claims (6)

1. A battery equalization repairing system is characterized by comprising a battery pack (1), a main control module (2), an electric quantity detection chip (3), a charging circuit (4), a discharging circuit (5), a cut-off switch (6), a voltage detection module (8) and a bidirectional DC/DC module (9); wherein,

the battery pack (1) is electrically connected with the electric quantity detection chip (3), and the electric quantity detection chip (3) is electrically connected with the main control module (2) and is in signal connection, so that the electric quantity detection chip (3) acquires the electric quantity value of each battery monomer in the battery pack (1) and transmits the electric quantity values of all the battery monomers to the main control module (2);

the battery pack (1) is electrically connected with the voltage detection module (8), and the voltage detection module (8) is electrically connected with the main control module (2) and is in signal connection, so that the voltage detection module (8) acquires the voltage value of each battery monomer in the battery pack (1) and transmits the voltage values of all the battery monomers to the main control module (2);

each battery monomer in the battery pack (1) is respectively connected with a cut-off switch (6), and each cut-off switch (6) is electrically connected and in signal connection with the main control module (2) so that each cut-off switch (6) is in forward conduction charging or reverse conduction discharging according to a switch signal of the main control module (2);

the battery pack (1) is respectively electrically connected with the charging circuit (4) and the discharging circuit (5), the charging circuit (4) and the discharging circuit (5) are respectively electrically connected with the main control module (2) and in signal connection, so that the main control module (2) controls the charging circuit (4) or the discharging circuit (5) to be connected with or disconnected from the battery pack (1) according to the electric quantity values or voltage values of all the battery monomers;

the bidirectional DC/DC module (9) is connected with the battery pack (1) through the cut-off switch (6), and the bidirectional DC/DC module (9) is respectively connected with the charging circuit (4) or the discharging circuit (5), so that the bidirectional DC/DC module (9) balances the electric quantity of each battery cell in the battery pack (1).

2. The battery equalization repair system according to claim 1, wherein when the main control module (2) determines that the battery pack (1) is in the low-battery state, the main control module (2) controls the charging circuit (4) to be conducted with the battery pack (1), and the main control module (2) controls each cut-off switch (6) to be conducted and charged forward.

3. The battery equalization repair system according to claim 2, wherein the main control module (2) determines that the difference between the electric quantities of the battery cell with the maximum electric quantity and the battery cell with the minimum electric quantity in the battery pack (1) is greater than a preset value, or the voltage difference between the battery cells is greater than a preset value, the main control module (2) sequentially controls the cut-off switch (6) connected with the battery cell with the maximum electric quantity or the maximum voltage to conduct and discharge in the reverse direction, and meanwhile, the main control module (2) controls the discharge circuit (5) to conduct, and the current of the battery cell conducting and discharging in the reverse direction flows to other battery cells through the bidirectional DC/DC module (9).

4. The battery equalization repair system according to claim 1, wherein when the main control module (2) determines that the battery pack (1) is in a high power state, and when the main control module (2) determines that the power difference between the battery cell with the maximum power and the battery cell with the minimum power in the battery pack (1) is greater than a preset value, the main control module (2) controls the cut-off switch (6) connected to the battery cell with the maximum power to conduct and discharge in the reverse direction, and at the same time, the main control module (2) controls the discharge circuit (5) to conduct, and the current of the battery cell conducting and discharging in the reverse direction flows to other battery cells through the bidirectional DC/DC module (9).

5. The battery equalization repair system according to claim 1, wherein when the main control module (2) determines that the battery pack (1) is in the high-power state, the main control module (2) controls the discharge circuit (5) to be conducted with the battery pack (1) at regular time.

6. The battery equalization repair system according to claim 1, further comprising a temperature detection module (7), wherein the temperature detection module (7) is connected with the battery pack (1), and the temperature detection module (7) is electrically connected and in signal connection with the main control module (2), so that the temperature detection module (7) detects the temperature of the battery pack (1) during the power equalization process and transmits the temperature of the battery pack (1) to the main control module (2), and the main control module (2) controls the charging circuit (4) or the discharging circuit (5) to be disconnected from the battery pack (1) when the temperature exceeds a preset value.

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