A lithium battery positive electrode protection driving module

Abstract

This utility model relates to the field of lithium battery protection technology, and in particular to a lithium battery positive electrode protection drive module, including a PCB base plate. A surface-mount transistor, multiple surface-mount MOSFETs, multiple surface-mount diodes, and a surface-mount capacitor are fixedly mounted inside the PCB base plate. A surface-mount optocoupler is disposed on one side of the outer surface of the PCB base plate. Through the surface-mount MOSFETs, when the device is in use, the lithium battery is connected to the device. During the lithium battery charging process, if the secondary protection condition is triggered after BMS failure, the surface-mount MOSFETs in the device intervene and cut off the lithium battery charging circuit. Since the surface-mount MOSFETs only draw 5mA, compared to the 230mA draw power of a typical power relay, this device can disconnect within 300 microseconds. This allows for rapid protection of the lithium battery, preventing it from continuing to charge and potentially catching fire or exploding, thus improving the safety of lithium battery charging.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery protection technology, specifically a lithium battery positive electrode protection drive module. Background Technology

[0002] Lithium batteries can be broadly classified into two categories: lithium metal batteries and lithium-ion batteries. Lithium-ion batteries do not contain metallic lithium and are rechargeable.

[0003] Existing lithium batteries lack protection structures during charging, which allows the battery to continue charging even after the BMS fails, leading to fires and explosions and posing safety hazards to the surrounding environment. Based on the shortcomings of existing technology, this utility model designs a lithium battery positive electrode protection drive module. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a lithium battery positive electrode protection drive module, which has the advantage of protecting the lithium battery when the lithium battery BMS fails, preventing it from continuing to charge, catching fire, or exploding.

[0005] This utility model provides the following technical solution: a lithium battery positive electrode protection drive module, including a PCB base plate, a surface-mount transistor fixedly installed inside the PCB base plate, a plurality of surface-mount MOSFETs fixedly installed inside the PCB base plate, a plurality of surface-mount diodes fixedly installed inside the PCB base plate, a surface-mount capacitor fixedly installed inside the PCB base plate, and a surface-mount optocoupler disposed on one side of the outer surface of the PCB base plate.

[0006] As a preferred embodiment of this utility model, the top of the PCB base plate is provided with two aluminum alloy heat sinks, and the top of the PCB base plate is threaded with four fixing screws.

[0007] As a preferred embodiment of this utility model, the four fixing screws are threadedly connected to the two aluminum alloy heat sinks.

[0008] As a preferred embodiment of this utility model, three first screw seats are fixedly installed on one side of the top of the PCB base plate, and the three first screw seats are provided with first connecting holes inside.

[0009] As a preferred technical solution of this utility model, a second screw seat is fixedly installed on one side of the top of the PCB base plate, and a second connecting seat is provided inside the three second screw seats.

[0010] As a preferred embodiment of this utility model, an isolation module is fixedly installed on one side of the outer surface of the PCB base plate.

[0011] As a preferred embodiment of this utility model, a pin holder is fixedly installed on one side of the outer surface of the PCB base plate.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. This lithium battery positive electrode protection drive module, through a surface-mount MOSFET, connects the lithium battery to the device during use. When the lithium battery is charging and triggers the secondary protection condition after the BMS fails, the surface-mount MOSFET in the device intervenes to cut off the lithium battery charging circuit. Since the surface-mount MOSFET only draws 5mA, compared to the 230mA draw of a typical power relay, this device can disconnect within 300 microseconds. Therefore, it can protect the lithium battery in the fastest possible time, preventing it from continuing to charge and catching fire or exploding, thus improving the safety of lithium battery charging. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the appearance and structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the surface mount diode structure of this utility model;

[0016] Figure 3 This is a schematic diagram of the isolation module structure of this utility model;

[0017] Figure 4 This is a schematic diagram of the structure of this utility model.

[0018] In the diagram: 1. PCB base plate; 2. First screw seat; 21. First connecting hole; 3. Second screw seat; 31. Second connecting seat; 4. Isolation module; 5. Pin seat; 6. Aluminum alloy heat sink; 7. Surface mount MOSFET; 8. Surface mount diode; 9. Fixing screw; 10. Surface mount transistor; 11. Surface mount capacitor; 12. Surface mount optocoupler. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1-4A lithium battery positive electrode protection drive module includes a PCB base plate 1, a surface mount transistor 10 fixedly mounted inside the PCB base plate 1, a plurality of surface mount MOSFETs 7 fixedly mounted inside the PCB base plate 1, a plurality of surface mount diodes 8 fixedly mounted inside the PCB base plate 1, a surface mount capacitor 11 fixedly mounted inside the PCB base plate 1, and a surface mount optocoupler 12 disposed on one side of the outer surface of the PCB base plate 1.

[0021] Please see Figure 1-3 The PCB base plate 1 has two aluminum alloy heat sinks 6 on its top, and four fixing screws 9 are threaded onto its top. The four fixing screws 9 are threadedly connected to the two aluminum alloy heat sinks 6. Three first screw seats 2 are fixedly installed on one side of the top of the PCB base plate 1, and each of the three first screw seats 2 has a first connecting hole 21 inside. Two second screw seats 3 are fixedly installed on one side of the top of the PCB base plate 1, and each of the three second screw seats 3 has a second connecting seat 31 inside. An isolation module 4 is fixedly installed on one side of the outer surface of the PCB base plate 1. A pin header 5 is fixedly installed on one side of the outer surface of the PCB base plate 1.

[0022] Two aluminum alloy heat sinks 6 are used for overall device heat dissipation. Three first connection holes 21 are used to connect to the positive output terminal. Three second connection sockets 31 are used to connect to the positive terminal of the lithium battery. An isolation module 4 is used for voltage boosting.

[0023] Working principle: When a lithium battery positive electrode protection drive module is used, the output positive electrode and the lithium battery positive electrode are first connected through the first connection hole 21 and the second connection seat 31. Then, the battery is connected through the pin seat 5. During the lithium battery charging process, when the lithium battery triggers the secondary protection condition after the BMS fails, the surface-mount MOS7 in the device intervenes and cuts off the lithium battery charging circuit. Since the surface-mount MOS7 only has a current of 5mA, compared with the 230mA pull-in power consumption of a general power relay, this device can disconnect within 300 microseconds. Thus, the lithium battery can be protected in the fastest time to prevent it from continuing to charge and catching fire or exploding, thereby improving the safety of lithium battery charging.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A lithium battery positive electrode protection drive module, comprising a PCB base plate (1), characterized in that: A surface-mount transistor (10) is fixedly installed inside the PCB base plate (1). A plurality of surface-mount MOSFETs (7) are fixedly installed inside the PCB base plate (1). A plurality of surface-mount diodes (8) are fixedly installed inside the PCB base plate (1). A surface-mount capacitor (11) is fixedly installed inside the PCB base plate (1). A surface-mount optocoupler (12) is provided on one side of the outer surface of the PCB base plate (1).

2. The lithium battery positive electrode protection drive module according to claim 1, characterized in that: The PCB base plate (1) has two aluminum alloy heat sinks (6) on its top, and four fixing screws (9) are threaded on its top.

3. The lithium battery positive electrode protection drive module according to claim 2, characterized in that: The four fixing screws (9) are threaded to the two aluminum alloy heat sinks (6).

4. The lithium battery positive electrode protection drive module according to claim 1, characterized in that: Three first screw seats (2) are fixedly installed on one side of the top of the PCB base plate (1), and the three first screw seats (2) are provided with first connection holes (21).

5. A lithium battery positive electrode protection drive module according to claim 1, characterized in that: The top side of the PCB base plate (1) is fixedly installed with a second screw seat (3), and the three second screw seats (3) are provided with a second connecting seat (31).

6. A lithium battery positive electrode protection drive module according to claim 1, characterized in that: An isolation module (4) is fixedly installed on one side of the outer surface of the PCB base plate (1).

7. A lithium battery positive electrode protection drive module according to claim 1, characterized in that: A pin holder (5) is fixedly installed on one side of the outer surface of the PCB base plate (1).

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