Lithium battery switch control device

Abstract

The utility model discloses a lithium battery switch control device comprising a circuit board which is provided with a button module, a signal isolation module, a BMS interface module and a master control interface module. The BMS interface module is electrically connected with the battery module; the key module is connected with the BMS interface module and is used for outputting a switch control signal to control the on-off state of the battery module; the main control interface module is electrically connected with a main control board, the main control interface module is connected with the BMS interface module through the signal isolation module, and the main control interface module is used for controlling the on-off state of the battery module according to a remote control signal output by the main control board. According to the utility model, the functions of local switch control and remote switch control can be realized, the overall structure is simple, the cost is low, and the applicability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a lithium battery switch control device. Background Art

[0002] At present, the discharge and charging current of high-power energy storage Li batteries often reaches more than 100A. In order to ensure the safety of electricity use, it is generally necessary to set a switch on the power supply channel. Due to the large current, the selection requirements for switches are also high. At present, contactors that can pass large currents are often used. The voltage and current of the contactor control coil are relatively high, and a special control circuit needs to be designed, resulting in a more complex structure and higher product cost. Secondly, in general, Li batteries only support local switches, not remote switches, which greatly reduces the applicability of the product. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a lithium battery switch control device, which can realize local switch control and remote switch control functions, has a simple overall structure, low cost and high applicability.

[0004] In order to solve the above technical problems, the utility model provides a lithium battery switch control device, including a circuit board, on which a key module, a signal isolation module, a BMS interface module and a main control interface module are provided; the BMS interface module is electrically connected to the battery module; the key module is connected to the BMS interface module, and is used to output a switch control signal to control the switch state of the battery module; the main control interface module is electrically connected to the main control board, and the main control interface module is connected to the BMS interface module through the signal isolation module, and is used to control the switch state of the battery module according to the remote control signal output by the main control board.

[0005] As an improvement of the above scheme, the main control interface module includes a switch control interface and a ground interface; the switch control interface is electrically connected to the switch control pin of the main control board, and the switch control interface is electrically connected to the control signal interface of the BMS interface module through the first channel of the signal isolation module, and is used to control the switch state of the battery module according to the remote control signal output by the main control board; the ground interface is electrically connected to the ground pin of the main control board and the ground end of the second channel of the signal isolation module respectively.

[0006] As an improvement of the above scheme, the main control interface module also includes an alarm status interface; the alarm status interface is electrically connected to the first signal pin of the main control board, and the alarm status interface is electrically connected to the alarm signal interface of the BMS interface module through the second channel of the signal isolation module, so as to transmit the alarm status signal output by the battery module to the main control board.

[0007] As an improvement of the above scheme, the main control interface module also includes a normal state interface; the normal state interface is electrically connected to the second signal pin of the main control board, and the normal state interface is electrically connected to the normal signal interface of the BMS interface module through the second channel of the signal isolation module, so as to transmit the normal state signal output by the battery module to the main control board.

[0008] As an improvement of the above solution, the two signal terminals of the button module are electrically connected to the control signal interface and the drive signal interface of the BMS interface module respectively, so as to output a switch control signal to control the switch state of the battery module.

[0009] As an improvement of the above solution, the button module is provided with at least two indicator lights of different colors, and the indicator lights are electrically connected to the alarm signal interface and the normal signal interface of the BMS interface module respectively.

[0010] As an improvement of the above solution, the signal isolation module is an optocoupler isolation module.

[0011] As an improvement of the above solution, the battery module includes a lithium battery module and a BMS battery management module electrically connected to the lithium battery module.

[0012] The beneficial effects of implementing the utility model are:

[0013] The utility model utilizes the BMS interface module to connect with the BMS battery management module of the battery module, and realizes the local switch control and remote switch control functions of the battery module through the key module and the main control interface module. The overall structure is simple, the cost is low, the applicability is high, and it can meet the actual needs of users. Secondly, the utility model can also realize local monitoring and remote monitoring of the battery status. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the first embodiment of the lithium battery switch control device of the utility model;

[0015] Figure 2 It is a structural schematic diagram of the battery module of the utility model;

[0016] Figure 3 It is a structural schematic diagram of the second embodiment of the lithium battery switch control device of the utility model;

[0017] Figure 4 It is a structural schematic diagram of the key module of the utility model. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings.

[0019] like Figure 1 As shown, Figure 1 The schematic diagram of the structure of the first embodiment of the lithium battery switch control device of the utility model is shown. This embodiment includes a circuit board 1, on which a key module 2, a signal isolation module 3, a BMS interface module 4 and a main control interface module 5 are provided; the BMS interface module 4 is connected to the corresponding pin end of the BMS battery management module 62 in the battery module 6; the key module 2 is connected to the BMS interface module 4, and is used to output a switch control signal to control the switch state of the battery module 6; the main control interface module 5 is electrically connected to the main control board, and the main control interface module 5 is connected to the BMS interface module 4 through the signal isolation module 3, and is used to control the switch state of the battery module 6 according to the remote control signal output by the main control board.

[0020] Among them, the signal isolation module 3 is set up to play a role in signal isolation, protect the IO pins of the main control board and the BMS battery management module 62, prevent IO damage caused by level mismatch or different reference grounds, and improve the safety of device use.

[0021] When local switch control is required, the user can realize local switch control of the battery module 6 by controlling the button module 2, and change the switch state of the battery module 6; when remote control is required, the user sends the remote control signal to the main control board by wireless means, and the main control interface module 5 receives and transmits the remote control signal output by the main control board to realize remote switch control, and can also change the switch state of the battery module 6. Therefore, the local switch control and remote switch control functions of the battery module 6 can be realized by the above method, and the overall structure is simple, the cost is low, the applicability is high, and it can meet the actual needs of users.

[0022] Specifically, the main control interface module 5 includes a switch control interface 51 and a grounding interface 52; the switch control interface 51 is electrically connected to the switch control pin of the main control board, and the switch control interface 51 is electrically connected to the control signal interface 41 of the BMS interface module 4 through the first channel of the signal isolation module 3, and is used to control the switch state of the battery module 6 according to the remote control signal output by the main control board; the grounding interface 52 is electrically connected to the grounding pin of the main control board and the grounding end of the second channel of the signal isolation module 3 respectively; wherein the grounding interface 52 serves as the reference ground for other connection pins of the main control board. The remote control signal output by the main control board is received and sent to the signal isolation module 3 through the switch control interface 51, and then the signal isolation module 3 transmits the remote control signal to the battery module 6 through the control signal interface 41 of the BMS interface module 4, so as to realize the remote light-on control function.

[0023] Furthermore, the two signal terminals of the button module 2 are electrically connected to the control signal interface 41 and the drive signal interface 42 of the BMS interface module 4, respectively, for outputting a switch control signal to control the switch state of the battery module 6. The switch control signal is output to the battery module 6 by controlling the button module 2 to realize the local switch control function.

[0024] Preferably, the signal isolation module 3 is preferably an optical coupling isolation module, but not limited thereto. The chip model of the optical coupling isolation module is preferably TLP281-4, but not limited thereto.

[0025] Preferably, if Figure 2 As shown, the battery module 6 includes a lithium battery module 61 and a BMS battery management module 62 electrically connected to the lithium battery module 61 .

[0026] like Figures 3 to 4 As shown, Figures 3 to 4 The schematic diagram of the structure of the second embodiment of the lithium battery switch control device of the utility model is shown. Figure 1 The difference from the first embodiment shown is that the main control interface module 5 further includes an alarm state interface 53 and a normal state interface 54 , and the button module 2 is provided with at least two indicator lights 21 of different colors.

[0027] The alarm status interface 53 is electrically connected to the first signal pin of the main control board, and the alarm status interface 53 is electrically connected to the alarm signal interface 43 of the BMS interface module 4 through the second channel of the signal isolation module 3, and is used to transmit the alarm status signal output by the battery module 6 to the main control board. When the battery module 6 is in a fault, an alarm signal will be output, and the signal will be transmitted to the main control board through the alarm signal interface 43, the signal isolation module 3 and the alarm status interface 53 in sequence. The main control board performs remote signal transmission to realize remote monitoring of the battery fault status.

[0028] The normal state interface 54 is electrically connected to the second signal pin of the main control board, and the normal state interface 54 is electrically connected to the normal signal interface 44 of the BMS interface module 4 through the second channel of the signal isolation module 3, and is used to transmit the normal state signal output by the battery module 6 to the main control board. When the battery module 6 is in normal operation, it will output a normal state signal, which is sequentially transmitted to the main control board through the normal signal interface 44, the signal isolation module 3 and the normal state interface 54. The main control board performs remote signal transmission to realize remote monitoring of the normal state of the battery.

[0029] Furthermore, the indicator lights 21 of different colors are electrically connected to the alarm signal interface 43 and the normal signal interface 44 of the BMS interface module 4. When the battery module 6 is in a fault, an alarm signal will be output, so that the corresponding indicator light 21 can realize the fault indication function; when the battery module 6 is in normal operation, a normal signal will be output, so that the corresponding indicator light 21 can realize the normal indication function, so that the local monitoring of the battery status can be realized in the above manner.

[0030] In summary, the utility model utilizes the BMS interface module to connect with the BMS battery management module of the battery module, and realizes the local switch control and remote switch control functions of the battery module through the key module and the main control interface module. The overall structure is simple, the cost is low, the applicability is high, and it can meet the actual needs of users. Secondly, the utility model can also realize local monitoring and remote monitoring of the battery status, which is convenient for users to know the battery working status in time and take corresponding measures in time, thereby improving the monitoring effect and safety of the product.

[0031] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the protection scope of the present invention.

Claims

1. A lithium battery switch control device, characterized in that: It includes a circuit board, on which a key module, a signal isolation module, a BMS interface module and a main control interface module are provided; The BMS interface module is electrically connected to the battery module; The button module is connected to the BMS interface module and is used to output a switch control signal to control the switch state of the battery module; The main control interface module is electrically connected to the main control board, and is connected to the BMS interface module through the signal isolation module, and is used to control the switch state of the battery module according to the remote control signal output by the main control board.

2. The lithium battery switch control device according to claim 1, characterized in that: The main control interface module includes a switch control interface and a grounding interface; The switch control interface is electrically connected to the switch control pin of the main control board, and the switch control interface is electrically connected to the control signal interface of the BMS interface module through the first channel of the signal isolation module, and is used to control the switch state of the battery module according to the remote control signal output by the main control board; The grounding interface is electrically connected to the grounding pin of the main control board and the grounding end of the second channel of the signal isolation module respectively.

3. The lithium battery switch control device according to claim 2, characterized in that: The main control interface module also includes an alarm status interface; The alarm status interface is electrically connected to the first signal pin of the main control board, and the alarm status interface is electrically connected to the alarm signal interface of the BMS interface module through the second channel of the signal isolation module, so as to transmit the alarm status signal output by the battery module to the main control board.

4. The lithium battery switch control device according to claim 2, characterized in that: The main control interface module also includes a normal state interface; The normal state interface is electrically connected to the second signal pin of the main control board, and the normal state interface is electrically connected to the normal signal interface of the BMS interface module through the second channel of the signal isolation module, so as to transmit the normal state signal output by the battery module to the main control board.

5. The lithium battery switch control device according to claim 1, characterized in that: The two signal terminals of the button module are electrically connected to the control signal interface and the drive signal interface of the BMS interface module respectively, and are used to output a switch control signal to control the switch state of the battery module.

6. The lithium battery switch control device according to claim 4, characterized in that: The button module is provided with at least two indicator lights of different colors, and the indicator lights are electrically connected to the alarm signal interface and the normal signal interface of the BMS interface module respectively.

7. The lithium battery switch control device according to any one of claims 1 to 4, characterized in that: The signal isolation module is an optocoupler isolation module.

8. The lithium battery switch control device according to claim 1, characterized in that: The battery module includes a lithium battery module and a BMS battery management module electrically connected to the lithium battery module.

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