Lithium battery protection board with accelerated shutdown

Abstract

The utility model discloses a lithium battery protection board of accelerated closing can, and lithium battery protection board of accelerated closing can includes protection board, is provided with a plurality of different height components on the protection board, and the top component is provided with the heat dissipation board, is provided with a plurality of heat dissipation blocks for the bottom component on the heat dissipation board, and the heat dissipation block is detachably arranged on the heat dissipation board. Through setting heat dissipation board and detachable heat dissipation block, and further solve the concentrated heat dissipation problem of multilayer height different components, especially guarantee the thermal stability of key component MOS pipe, thereby improved the reliability and life of lithium battery protection board under the high current working scene of quick shutdown etc.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery protection board technology, and in particular to a lithium battery protection board that can accelerate shutdown. Background Technology

[0002] Lithium-ion batteries, with their advantages of high energy density, long cycle life, and low self-discharge rate, have been widely used in consumer electronics, electric vehicles, and energy storage systems. As a core component of the battery management system (BMS), the lithium-ion battery protection board is mainly used to monitor and protect against abnormal conditions such as overcharging, over-discharging, overcurrent, and short circuits. Among these components, the MOSFET, as a key switching element, is prone to generating a large amount of heat when rapidly shutting off high currents.

[0003] In existing technologies, lithium battery protection boards typically use a single heat sink or thermal coating to dissipate heat from components. However, the components on the protection board (such as MOSFETs, resistors, and capacitors) have varying heights, making it difficult for traditional planar heat dissipation structures to effectively contact components of different heights simultaneously, especially for shorter MOSFETs. Insufficient heat dissipation in MOSFETs leads to excessive temperature rise, resulting in decreased performance, slower response speed, or even premature failure, thus affecting the reliability and safety of the entire protection board. Utility Model Content

[0004] This invention addresses the shortcomings of existing technologies by providing a lithium battery protection board that can accelerate shutdown. To solve the above-mentioned technical problems, the present invention provides the following technical solution: a lithium battery protection board that can accelerate shutdown includes a protection board, on which several components of different heights are arranged, a heat sink is attached to the top components, and several heat sink blocks for attaching to the bottom components are arranged on the heat sink, the heat sink blocks being detachably mounted on the heat sink.

[0005] In the above scheme, preferably, the components include several MOSFETs for accelerated shutdown, and several resistive and capacitive elements with a height higher than the MOSFETs, and the bottom of the heat sink is attached to the resistive and capacitive elements.

[0006] In the above scheme, preferably, the heat sink is connected to the heat sink plate by a connector, and the heat sink is placed in contact with the MOS transistor.

[0007] In the above scheme, preferably, the heat sink is provided with a number of heat dissipation holes.

[0008] In the above scheme, preferably, the connector passes through the heat dissipation hole to connect the heat sink to the heat sink plate.

[0009] In the above scheme, preferably, the heat sink is provided with a plurality of protrusions, the protrusions overlap with the connecting part of the protective plate, and the connecting part and the protrusions are connected by screws.

[0010] In the above scheme, preferably, the heat sink is provided with a clearance groove, which is provided corresponding to the connection hole on the protection plate.

[0011] In the above scheme, it is preferred that the heat dissipation hole is a hexagonal hole.

[0012] In the above scheme, it is preferred that the heat sink be hollow.

[0013] In the above scheme, preferably, both the heat sink and the heat sink block are made of aluminum.

[0014] The beneficial effects of this utility model are: by setting up a heat sink and a detachable heat sink, the problem of concentrated heat dissipation of components with different heights in multiple layers is solved, especially ensuring the thermal stability of the key component MOSFET, thereby improving the reliability and lifespan of the lithium battery protection board under high current operating scenarios such as rapid shutdown. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the unfolded form of this utility model.

[0016] Figure 2 This is a perspective view of the present utility model.

[0017] Figure 3 This is a top view of the present invention.

[0018] Figure 4 This is a side view of the present invention.

[0019] Figure 5 This is a perspective view of the back of the protective plate of this utility model. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments: See below Figures 1-5 A lithium battery protection board that can accelerate shutdown. The protection board 1 is usually a circuit board on which several electronic components of different heights are soldered.

[0021] Specifically, the components on the protection board 1 mainly include multiple MOSFETs for accelerating the shutdown of the lithium battery, which are relatively low in height, as well as resistors 5 and capacitors 6, which are typically higher than the MOSFETs.

[0022] Therefore, to accommodate the height differences of different components and achieve efficient heat dissipation, a heat sink 2 is attached to the top of the tallest component. The heat sink 2 is flat, and its bottom plane directly contacts and conducts heat to the tops of the taller resistive element 5 and capacitor element 6. For the shorter MOSFET, a heat sink 3 mounted on the main heat sink 2 extends downward and fits tightly against the surface of the MOSFET, thereby conducting the heat generated by the MOSFET to the main heat sink 2.

[0023] To facilitate heat dissipation from low-profile components, the bottom of the heat sink 2 is equipped with several detachable heat sink blocks 3. These heat sink blocks 3 are fixed to the heat sink 2 via connectors 7, and their installation position and height are adjustable to ensure precise contact with the surface of the low-profile components requiring heat dissipation.

[0024] The connector 7 can be a screw, bolt, or clip, etc. Several heat dissipation holes 8 are provided on the heat sink 2. These holes 8 not only enhance airflow and improve overall heat dissipation efficiency, but also allow the heat sink 3 to be connected to the heat sink 3 through the connector 7. That is, the connector 7 passes through the heat dissipation holes 8 to firmly connect and fix the heat sink 3 to the main heat sink 2.

[0025] To mount the entire heat sink 2 onto the protective plate 1, several protrusions 9 are provided on the heat sink 2. The positions of the protrusions 9 coincide with the inherent connecting portions 10 on the protective plate 1. Screws 13 are typically screwed into the connecting portions 10 of the protective plate 1 through the protrusions 9 to achieve mechanical fixation between the two.

[0026] In addition, the heat sink 2 is provided with a clearance groove 11. The position of the clearance groove 11 corresponds to the pre-existing connection hole 12 on the protection plate 1, such as an interface or through hole for external wiring harness connection, ensuring that the installation of the heat sink 2 will not interfere with the original electrical connection function of the protection plate 1.

[0027] Furthermore, the heat dissipation holes 8 on the heat sink 2 can be hexagonal, which provides a larger heat dissipation surface area and better ventilation while ensuring structural strength. To further optimize heat dissipation efficiency and reduce weight, the heat sink 3 can be designed as a hollow structure. Both the heat sink 2 and the heat sink 3 are preferably made of metal materials with good thermal conductivity, such as aluminum alloy or pure aluminum, which balances good thermal conductivity, lightweight, and cost control.

[0028] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A lithium battery protection board that can accelerate shutdown, characterized in that: Includes a protective plate (1), on which several components of different heights are provided, and a heat sink (2) is provided to fit the top components. Several heat sink blocks (3) for fitting the bottom components are provided on the heat sink (2), and the heat sink blocks (3) are detachably mounted on the heat sink (2).

2. The lithium battery protection board with accelerated shutdown according to claim 1, characterized in that: The components include several MOS transistors for accelerated shutdown, and several resistors (5) and capacitors (6) with a height higher than the MOS transistors. The bottom of the heat sink (2) is attached to the resistors (5) and capacitors (6).

3. The lithium battery protection board with accelerated shutdown according to claim 2, characterized in that: The heat sink (3) is connected to the heat sink (2) via a connector (7), and the heat sink (3) is placed in contact with the MOS transistor.

4. The lithium battery protection board with accelerated shutdown according to claim 3, characterized in that: The heat sink (2) is provided with a number of heat dissipation holes (8).

5. The lithium battery protection board with accelerated shutdown according to claim 4, characterized in that: The connector (7) passes through the heat dissipation hole (8) to connect the heat dissipation block (3) to the heat dissipation plate (2).

6. The lithium battery protection board with accelerated shutdown according to claim 1, characterized in that: The heat sink (2) is provided with a plurality of protrusions (9), the protrusions (9) overlap with the connecting part (10) of the protective plate (1), and the connecting part (10) and the protrusions (9) are connected by screws (13).

7. The lithium battery protection board with accelerated shutdown according to claim 1, characterized in that: The heat sink (2) is provided with a relief groove (11), which is provided corresponding to the connection hole (12) on the protection plate (1).

8. The lithium battery protection board with accelerated shutdown according to claim 5, characterized in that: The heat dissipation hole (8) is a hexagonal hole.

9. The lithium battery protection board with accelerated shutdown according to claim 1, characterized in that: The heat sink (3) is hollow.

10. The lithium battery protection board with accelerated shutdown according to claim 1, characterized in that: Both the heat sink (2) and the heat sink block (3) are made of aluminum.

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