An adaptive overload protection lithium battery management device

Abstract

The utility model relates to the field of lithium battery management discloses a kind of lithium battery management devices of self-adapting overload protection, including protection shell, and the protection shell top is provided with overload trigger component;The overload trigger component includes base one, and the base one bottom is fixedly connected at the top end of protection shell, and the base one top is fixedly connected with base two, and the base two top is fixedly connected with fixed column, and the base two top is fixedly connected with bimetallic strip, and the base one top is provided with static contact plate, and the static contact plate top is fixedly connected with clamping block.In the utility model, bimetallic strip is moved by heat deformation to drive trigger top rod, so that moving contact and static contact point are separated, and circuit on-off control is realized by reset spring cooperation, so as to carry out overload protection to lithium battery circuit, reach the effect of self-adapting overload protection, improve the security of lithium battery use, solve the problem that traditional fixed threshold protection is prone to false triggering or hysteresis protection.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery management, and in particular to a lithium battery management device with adaptive overload protection. Background Technology

[0002] With the development of adaptive overload protection lithium battery management devices, more and more adaptive overload protection lithium battery management devices are being used in new energy vehicles, portable electronic devices and industrial automation equipment. Reasonable use of adaptive overload protection lithium battery management devices can greatly improve safety performance, extend lithium battery life and improve operational stability.

[0003] A search revealed a method for monitoring and controlling the charging and discharging of a power battery to prevent overload, proposed in announcement number CN109980309B. The steps are as follows: Calculate the maximum charge / discharge rate of the power battery at various temperatures and different states of charge (SOC) using the voltage change rate; determine the upper limit voltage for charging / discharging at different temperatures and SOCs using the maximum charge / discharge rate; use the charge / discharge rate at each temperature as the overload current threshold, and the upper limit voltages for charging and discharging at different temperatures and SOCs as the battery aging fault thresholds; determine if the fault duration exceeds the set accidental duration and issue an alarm signal; after aging, recalibrate the power battery capacity, correcting the upper limit voltages for charging and discharging under the current battery capacity. This invention uses the maximum current load rate and voltage operating range as the monitoring objects of the entire vehicle battery system, offering convenient operation, high reliability, and easy determination of operating status and fault type identification, thus improving the system's feasibility and reliability. Existing adaptive overload protection lithium battery management devices suffer from insufficient protection accuracy, slow response speed, and poor reliability. Therefore, this invention proposes an adaptive overload protection lithium battery management device to address these issues. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides an adaptive overload protection lithium battery management device, which aims to improve the problems of insufficient protection accuracy, slow response speed and poor reliability in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An adaptive overload protection lithium battery management device includes a protective housing, wherein an overload triggering component is disposed on the top of the protective housing;

[0007] The overload triggering assembly includes a base one, the bottom of which is fixedly connected to the top of the protective shell. A base two is fixedly connected to the top of the base one, a fixing post is fixedly connected to the top of the base two, and a bimetallic strip is fixedly connected to the top of the base two. A stationary contact plate is provided on the top of the base one, a clamping block is fixedly connected to the top of the stationary contact plate, a moving contact plate is fixedly connected inside the clamping block, a push rod is slidably connected inside the moving contact plate, a gasket is fixedly connected to the outer wall of the push rod, a spring two is provided on the outer wall of the push rod, the top of the spring two is fixedly connected to the bottom of the moving contact plate, and the bottom of the spring two is fixedly connected to the top of the gasket. A guide post is provided at one end of the stationary contact plate, and a spring one is provided on the outer wall of the guide post. One end of the spring one is fixedly connected to one end of the stationary contact plate, and the other end of the spring one is fixedly connected to the outer end of the push rod.

[0008] As a further description of the above technical solution:

[0009] A mounting plate is fixedly connected to the top of the protective shell, and a terminal is fixedly connected to the top of the mounting plate.

[0010] As a further description of the above technical solution:

[0011] The protective shell is provided with an outer shell, and a handle is fixedly connected to the top of the outer shell.

[0012] As a further description of the above technical solution:

[0013] A base plate is fixedly connected to the bottom of the outer casing, and a top cover is fixedly connected to the top of the outer casing.

[0014] As a further description of the above technical solution:

[0015] An interface is fixedly connected to the outer wall of the housing, and an input terminal is fixedly connected to the outer wall of the housing.

[0016] As a further description of the above technical solution:

[0017] A heat sink is fixedly connected to the outer wall of the housing, a grid is provided inside the heat sink, and a fan is provided inside the heat sink.

[0018] This utility model has the following beneficial effects:

[0019] 1. In this utility model, the bimetallic strip is heated and deformed, which drives the trigger rod to move, causing the moving contact to separate from the stationary contact. At the same time, the reset spring cooperates to realize the circuit on / off control, thereby providing overload protection for the lithium battery circuit. This achieves the effect of adaptive overload protection, improves the safety of lithium battery use, and solves the problem of easy false triggering or hysteresis protection in traditional fixed threshold protection.

[0020] 2. In this utility model, by setting a fan, the airflow inside the device can be accelerated, and the heat generated during the lithium battery management process can be discharged in time, thereby playing a heat dissipation role for the electronic components and lithium battery inside the device, achieving a high-efficiency heat dissipation effect, ensuring the stability of the device during long-term operation, and solving the problem of device performance degradation or even damage caused by heat accumulation. Attached Figure Description

[0021] Figure 1 This is a three-dimensional schematic diagram of an adaptive overload protection lithium battery management device proposed in this utility model;

[0022] Figure 2 This is a schematic diagram of the protective shell of a lithium battery management device with adaptive overload protection proposed in this utility model;

[0023] Figure 3 This is a schematic diagram of the static contact plate of an adaptive overload protection lithium battery management device proposed in this utility model.

[0024] Legend:

[0025] 1. Outer shell; 2. Handle; 3. Interface; 4. Input terminal; 5. Heat sink; 6. Fan; 7. Protective shell; 8. Mounting plate; 9. Terminal; 10. Top cover; 11. Base plate; 12. Grid; 13. Base 1; 14. Base 2; 15. Fixing post; 16. Bimetallic strip; 17. Clamping block; 18. Moving contact plate; 19. Stationary contact plate; 20. Top rod; 21. Washer; 22. Guide post; 23. Spring 1; 24. Spring 2. Detailed Implementation

[0026] 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.

[0027] Example 1:

[0028] Reference Figure 1 and Figure 2 The present invention provides an embodiment of an adaptive overload protection lithium battery management device, including a protective shell 7, wherein an overload triggering component is provided on the top of the protective shell 7;

[0029] The overload triggering assembly includes a base 13, the bottom of which is fixedly connected to the top of the protective shell 7. A base 2 14 is fixedly connected to the top of the base 13, and the base 2 14 cooperates with the base 13 to provide a stable mounting base for the upper assembly. A fixing post 15 is fixedly connected to the top of the base 2 14, and a bimetallic strip 16 is fixedly connected to the top of the base 2 14. The bimetallic strip 16 is made of two metals with different coefficients of thermal expansion and is the core component for overload triggering. A stationary contact plate 19 is provided on the top of the base 13. The stationary contact plate 19 is made of conductive material, and a clamping block 17 is fixedly connected to the top of the stationary contact plate 19. 17 has a fixedly connected movable contact plate 18, which is also made of conductive material. A push rod 20 is slidably connected inside the movable contact plate 18. A gasket 21 is fixedly connected to the outer wall of the push rod 20. The push rod 20 can slide inside the movable contact plate 18. A second spring 24 is provided on the outer wall of the push rod 20. The top end of the second spring 24 is fixedly connected to the bottom end of the movable contact plate 18. The bottom end of the second spring 24 is fixedly connected to the top end of the gasket 21. A guide post 22 is provided at one end of the stationary contact plate 19. A first spring 23 is provided on the outer wall of the guide post 22. One end of the first spring 23 is fixedly connected to one end of the stationary contact plate 19. The other end of the first spring 23 is fixedly connected to the outer end of the push rod 20.

[0030] Example 2:

[0031] Reference Figure 1 and Figure 3 The protective shell 7 has a mounting plate 8 fixedly connected to its top, and a terminal 9 fixedly connected to the top of the mounting plate 8. The terminal 9 is used to connect the circuit. The protective shell 7 has an outer shell 1, which provides external protection for the entire device. The top of the outer shell 1 has a handle 2 fixedly connected to it, which makes it easy to lift and carry the whole device. The bottom of the outer shell 1 has a base plate 11 fixedly connected to it, and the top of the outer shell 1 has a top cover 10 fixedly connected to it. The outer wall of the outer shell 1 has an interface 3 fixedly connected to it, which is used to connect to external devices. The outer wall of the outer shell 1 has an input terminal 4 fixedly connected to it. The outer wall of the outer shell 1 has a heat sink 5 fixedly connected to it. The heat sink 5 has a grid 12 inside it, and a fan 6 inside it. The heat sink 5, grid 12 and fan 6 work together to effectively cool the internal structure and protect the whole device.

[0032] Working principle: When using this adaptive overload protection lithium battery management device, the bimetallic strip 16 first bends due to the difference in thermal expansion coefficients between the two metals when the circuit overheats, pushing the push rod 20 to move, causing the moving contact 18 to separate from the stationary contact 19, thus cutting off the circuit and achieving overload protection; the spring 1 23 and spring 2 24 assist the bimetallic strip 16 and other components to reset after the overload is released and the temperature drops, allowing the circuit to be reconnected.

[0033] When using this adaptive overload protection lithium battery management device, the fan 6 is activated to accelerate airflow, and heat is transferred to the outside of the device through the heat sink 5 and then dissipated through the grid 12, reducing the internal temperature of the device and ensuring that components such as interface 3, input terminal 4 and lithium battery operate stably at a suitable temperature.

[0034] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A lithium battery management device with adaptive overload protection, comprising a protective housing (7), characterized in that: An overload triggering component is provided on the top of the protective shell (7); The overload triggering assembly includes a base one (13), the bottom of which is fixedly connected to the top of the protective shell (7). A base two (14) is fixedly connected to the top of the base one (13). A fixing post (15) is fixedly connected to the top of the base two (14). A bimetallic strip (16) is fixedly connected to the top of the base two (14). A stationary contact plate (19) is provided on the top of the base one (13). A clamping block (17) is fixedly connected to the top of the stationary contact plate (19). A moving contact plate (18) is fixedly connected inside the clamping block (17). The moving contact plate (18) slides inside. A top rod (20) is connected, and a gasket (21) is fixedly connected to the outer wall of the top rod (20). A second spring (24) is provided on the outer wall of the top rod (20). The top end of the second spring (24) is fixedly connected to the bottom end of the moving contact plate (18), and the bottom end of the second spring (24) is fixedly connected to the top end of the gasket (21). A guide post (22) is provided at one end of the stationary contact plate (19). A first spring (23) is provided on the outer wall of the guide post (22). One end of the first spring (23) is fixedly connected to one end of the stationary contact plate (19), and the other end of the first spring (23) is fixedly connected to the outer end of the top rod (20).

2. The lithium battery management device with adaptive overload protection according to claim 1, characterized in that: The protective shell (7) is fixedly connected to the top of the mounting plate (8), and the top of the mounting plate (8) is fixedly connected to the terminal (9).

3. The lithium battery management device with adaptive overload protection according to claim 1, characterized in that: The protective shell (7) is provided with an outer shell (1), and a handle (2) is fixedly connected to the top of the outer shell (1).

4. The lithium battery management device with adaptive overload protection according to claim 3, characterized in that: The bottom of the outer shell (1) is fixedly connected to a base plate (11), and the top of the outer shell (1) is fixedly connected to a top cover (10).

5. The adaptive overload protection lithium battery management device according to claim 3, characterized in that: An interface (3) is fixedly connected to the outer wall of the outer shell (1), and an input terminal (4) is fixedly connected to the outer wall of the outer shell (1).

6. The lithium battery management device with adaptive overload protection according to claim 3, characterized in that: A heat sink (5) is fixedly connected to the outer wall of the outer shell (1), and a grid (12) is provided inside the heat sink (5). A fan (6) is provided inside the heat sink (5).

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