Battery adjusting device

Abstract

The utility model relates to the field of battery energy storage devices, in particular to a battery adjusting device. The embodiment of the utility model provides a battery adjusting device which comprises a plurality of battery cell units electrically connected with a charging circuit; an isolating circuit is arranged on one side of the battery cell unit; and when any one of the battery cell units is damaged, the corresponding isolating circuit is opened to isolate the battery cell unit. The temperature of the charging circuit can be monitored through the DMS, when a problem occurs, the battery cell unit with a specific fault can be further positioned through the temperature sensor, then the battery cell unit with the fault is isolated through the isolation circuit, damage of the battery cell unit with the fault to the whole battery pack is reduced, and meanwhile other battery cells can work normally.

Description

Technical Field

[0001] The utility model relates to the field of battery energy storage devices, in particular to a battery adjustment device. Background Art

[0002] As a battery circuit for energy storage devices, when the internal structure or characteristics of the battery change, it will cause an internal short circuit, while generating a lot of heat. The large current will affect other cells; in serious cases, it will cause a fire, damage the entire battery pack, and cause huge losses. Therefore, how to prevent the internal short circuit of the battery from damaging the entire battery pack is an urgent problem to be solved. Utility Model Content

[0003] The purpose of the utility model is to provide a battery adjustment device to solve the above problems.

[0004] In order to achieve the above-mentioned object, the embodiment of the utility model provides a battery adjustment device, comprising: a plurality of battery cell units, wherein the battery cell units are electrically connected to a charging circuit; and

[0005] An isolation circuit is provided on one side of the battery cell;

[0006] When any of the battery cells is damaged, the corresponding isolation circuit is opened to isolate the battery cell.

[0007] Furthermore, a sensor is provided on the isolation circuit to monitor the voltage of the corresponding battery cell unit.

[0008] Furthermore, a BMS is provided on the charging circuit.

[0009] Furthermore, at least one isolating switch is provided on the isolation circuit.

[0010] Furthermore, two isolation switches are provided on the isolation circuit, and the two isolation switches are respectively located on both sides of the positive and negative poles of the corresponding battery cell units.

[0011] Furthermore, a plurality of battery cells are connected in series to form a charging branch.

[0012] Furthermore, a circuit meter is provided on the charging branch.

[0013] Furthermore, the charging branch has three battery cell units.

[0014] Furthermore, the charging circuit has a plurality of charging branches.

[0015] Furthermore, the number of battery cell units on each charging branch is equal.

[0016] Compared with the prior art, the embodiments of the utility model have the following beneficial effects: the temperature of the charging circuit can be monitored through DMS, and when a problem occurs, the specific faulty battery cell unit can be further located through the temperature sensor, and then the faulty battery cell unit can be isolated through the isolation circuit, thereby reducing the damage of the faulty battery cell unit to the entire battery pack, while allowing the remaining batteries to work normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0018] Figure 1 The structure diagram of the battery adjustment device of the utility model is shown;

[0019] Figure 2 The BMS system framework diagram of the utility model is shown;

[0020] Figure 3 The flowchart of the BMS system of the present utility model is shown.

[0021] In the figure:

[0022] 1. Battery cell unit; 11. Ammeter; 2. Isolation circuit; 21. Isolation switch; 3. Sensor; 4. BMS. DETAILED DESCRIPTION

[0023] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0024] In the embodiment, as a battery circuit of an energy storage device, when the internal structure or characteristics of the battery change, it will cause an internal short circuit of the current, and at the same time generate a lot of heat. The large current will affect other cells; in serious cases, a fire will occur, damaging the entire battery pack and causing huge losses. In order to solve the above problems, such as Figure 1 As shown, at least one embodiment provides a battery adjustment device, including: a plurality of battery cells 1, the battery cells 1 are electrically connected to the charging circuit, and an isolation circuit 2 is provided on one side of the battery cells 1. Specifically, one isolation circuit 2 corresponds to one battery cell 1, and when any battery cell 1 is damaged, the isolation circuit 2 of the battery cell 1 is opened to isolate the damaged battery cell 1. Through the above arrangement, the problematic battery cell can be isolated, reducing the damage of the problematic battery cell to the entire battery pack, while ensuring the normal operation of the remaining battery cells.

[0025] In order to timely discover and isolate any of the above-mentioned battery cell units 1 when it is damaged, in some embodiments, preferably, a sensor 3 is provided on the isolation circuit 2, and the sensor 3 can simultaneously monitor the voltage and temperature of the corresponding battery cell unit 1. When the temperature of the corresponding battery cell unit 1 increases significantly, it can be determined that the battery cell unit 1 has a fault, and then the corresponding isolation circuit 2 is turned on to isolate the battery cell unit 1.

[0026] like Figure 2 As shown, in some embodiments, the charging circuit is provided with a BMS 4, namely BATTERY MANAGEMENT SYSTEM BMS4, a battery management system, which is connected to each sensor 3. After the sensor 3 receives the temperature and voltage signals of each battery cell unit 1, it can feed back to the BMS4. After receiving the signal, the BMS4 judges and outputs the on-off signal of the MOS, which is used to control the on-off of each isolation circuit 2.

[0027] In order to control the on and off of the isolation circuit 2, in some embodiments, at least one isolation switch 21 is provided on the isolation circuit 2. Preferably, two isolation switches 21 are provided on the isolation circuit 2, and the two isolation switches 21 are respectively located on the positive and negative sides of the corresponding battery cell unit 1.

[0028] In some embodiments, in order to increase the voltage of the charging circuit, a plurality of battery cells 1 are connected in series to form a charging branch. At the same time, the charging circuit has a plurality of charging branches to increase the current of the charging circuit.

[0029] In order to monitor the current on each charging branch, in some embodiments, an ammeter 11 is provided on the charging branch.

[0030] like Figure 3 As shown, the system flow of BMS4 is: first, start the sensor 3 to detect the temperature of the battery cell, use the ammeter 11 to detect the current of the battery cell unit 1, when the temperature and current are abnormal, DI feedback total pressure determines whether the MOS tube needs to be disconnected, BMS4 outputs an on-off signal, disconnects the corresponding MOS tube, and replaces the battery cell; if the DI feedback total pressure does not decrease, it is fed back to BMS4, BMS4 re-judges and controls the MOS to disconnect, and the circuit remains in a working state during this period.

[0031] In some embodiments, the charging branch has three battery cells 1, and the number of battery cells 1 on each charging branch is equal. Preferably, one charging circuit has three charging branches. That is, the entire charging circuit has three charging branches, and one charging branch has three battery cells 1, that is, there are nine battery cells 1 in total. The specific battery cell 1 isolation strategy is: when the temperature of any battery cell 1 rises, the sensor 3 detects the battery cell 1, and the two isolation switches 21 corresponding to the battery cell 1 are closed to isolate the battery cell 1. At the same time, one intact battery cell 1 is also selected from the other two charging branches and isolated through the corresponding isolation switch 21. That is, after one battery cell 1 of any charging branch is damaged and isolated, the other two charging branches will also isolate an intact battery cell 1. Ensure that after one battery cell 1 is damaged, the entire charging circuit can still be used normally, and at the same time, the number of battery cells 1 on each charging branch in the charging circuit is consistent to achieve normal balance of charging and discharging of the battery cell 1. Then, the staff can replace the damaged battery cell 1.

[0032] It is worth mentioning that the technical features such as other components involved in this utility model patent application should be regarded as prior art. The specific structure, working principle and possible control method and spatial layout method of these technical features can be selected by conventional methods in the field and should not be regarded as the invention point of this utility model patent. This utility model patent will not be further elaborated.

[0033] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A battery adjustment device, characterized in that: include: A plurality of battery cell units (1), wherein the battery cell units (1) are electrically connected to a charging circuit; and An isolation circuit (2) is provided on one side of the battery cell unit (1); in When any of the battery cell units (1) is damaged, the corresponding isolation circuit (2) is opened to isolate the battery cell unit (1).

2. The battery adjustment device according to claim 1, characterized in that: The isolation circuit (2) is provided with a sensor (3) to monitor the voltage of the corresponding battery cell unit (1).

3. The battery adjustment device according to claim 1, characterized in that: The charging circuit is provided with a BMS (4).

4. The battery adjustment device according to claim 1, characterized in that: At least one isolating switch (21) is provided on the isolating circuit (2).

5. The battery adjustment device according to claim 4, characterized in that: Two isolation switches (21) are provided on the isolation circuit (2), and the two isolation switches (21) are respectively located on the positive and negative poles of the corresponding battery cell unit (1).

6. The battery adjustment device according to claim 1, characterized in that: A plurality of battery cells (1) are connected in series to form a charging branch.

7. The battery adjustment device according to claim 6, characterized in that: An ammeter (11) is provided on the charging branch circuit.

8. The battery adjustment device according to claim 6, characterized in that: The charging branch circuit is provided with three battery cell units (1).

9. The battery adjustment device according to claim 6, characterized in that: The charging circuit is provided with a plurality of charging branches.

10. The battery adjustment device according to claim 9, characterized in that: The number of battery cell units (1) on each charging branch is equal.

Images