Lithium ion storage battery pack with charge and discharge protection

Abstract

The utility model relates to the technical field of storage battery packs, and discloses a lithium ion storage battery pack with charge and discharge protection, which comprises a shell, a heat dissipation mechanism and a connecting mechanism, the heat dissipation mechanism is arranged at the rear end of the shell and comprises a plurality of storage battery individuals, the connecting mechanism is arranged at the upper end of the shell, and the connecting mechanism is arranged at the lower end of the shell. The connecting mechanism comprises two fixing blocks and two rotating rods, the rear ends of the fixing blocks are fixedly connected with the shell, air duct frames are fixedly connected to the two sides of the outer wall of the rear end of the shell, and a cover plate is hinged to the upper ends of the air duct frames. According to the utility model, the return spring in the connecting mechanism acts on the clamping block, so that the clamping block is kept in a clamping state with the connecting block, the cover plate is fixed, and the shifting block fixedly connected with the lower end of the clamping block is utilized to drive the clamping block to rotate in the rotating groove along the rotating rod, so that the clamping state of the clamping block and the connecting block is released; and a worker can conveniently open the cover plate for maintenance.

Description

Technical Field

[0001] This utility model relates to the field of battery pack technology, and in particular to a lithium-ion battery pack with charge and discharge protection. Background Technology

[0002] A lithium-ion battery is a type of rechargeable battery that uses lithium ions as the main active material. The lithium ions undergo intercalation and deintercalation reactions between the positive and negative electrodes to achieve the charging and discharging process. Compared with ordinary batteries, it has a higher energy density. A lithium-ion battery pack is a power system that combines multiple lithium-ion battery cells in series or parallel.

[0003] However, since lithium-ion battery packs consist of multiple lithium-ion batteries housed inside a single casing, and most existing lithium-ion battery packs on the market are not easy to open, it is difficult for staff to open the casing to inspect the internal components when a lithium-ion battery malfunctions or is damaged, increasing the operational difficulty for staff.

[0004] Therefore, those skilled in the art have provided a lithium-ion battery pack with charge and discharge protection to solve the problems mentioned in the background art. Utility Model Content

[0005] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a lithium-ion battery pack with charge and discharge protection. The reset spring in the connecting mechanism acts on the locking block to keep the locking block engaged with the connecting block, thus fixing the cover plate. The actuating block fixedly connected to the lower end of the locking block drives the locking block to rotate along the rotating rod in the rotating groove, releasing the locking block from the connecting block and facilitating the opening of the cover plate for maintenance.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A lithium-ion battery pack with charge / discharge protection includes a casing, a heat dissipation mechanism, and a connection mechanism. The heat dissipation mechanism is located at the rear end of the casing and includes multiple individual batteries. The connection mechanism is located at the upper end of the casing and includes two fixing blocks and two rotating rods. The rear ends of the fixing blocks are fixedly connected to the casing. Air duct frames are fixedly connected to both sides of the outer wall at the rear end of the casing. A cover plate is hinged to the upper end of the air duct frame. Connecting blocks are fixedly connected to both sides of the outer wall at the front end of the cover plate. A rotating groove is formed inside each fixing block. A locking block is fixedly connected to the middle of the outer wall of each rotating rod. A return spring is fixedly connected to the inner wall at the rear end of each rotating groove. A toggle block is fixedly connected to the lower end of each locking block.

[0008] The above technical solution uses a reset spring in the connecting mechanism to act on a locking block fixedly connected to the middle of the rotating rod, keeping the locking block engaged with the connecting block on the cover plate and fixing the cover plate. The actuating block fixedly connected to the lower end of the locking block drives the locking block to rotate along the rotating rod in the rotating groove, thereby releasing the locking state between the locking block and the connecting block, thus facilitating the opening and closing of the cover plate.

[0009] Furthermore, cooling fans are fixedly connected to both sides of the middle of the inner wall of the rear end of the air duct frame, and multiple heat dissipation plates are fixedly connected to the bottom surface inside the outer shell. Multiple ventilation holes are opened on the outer walls of the front and rear ends of the heat dissipation plates.

[0010] The above technical solution uses multiple heat spreaders in the heat dissipation mechanism to evenly absorb the heat generated by the individual battery. At the same time, multiple ventilation holes are opened on the heat spreaders, and a cooling fan fixedly connected to the air duct frame draws in and exhausts outside air, so that the heat on the heat spreaders is carried away and the temperature of the individual battery is reduced.

[0011] Furthermore, a BMS component is fixedly connected to the lower end of one side of the outer wall of the housing, and handles are fixedly connected to the upper ends of both sides of the outer wall of the housing.

[0012] The above technical solution allows the battery management system built into the BMS component to monitor the status of the lithium-ion battery pack, such as individual cell voltage, battery terminal temperature, battery circuit current, battery pack terminal voltage, and battery system insulation resistance. This enables intelligent management and maintenance of each battery cell, preventing overcharging and over-discharging, and extending battery life. The two handles fixedly connected to the casing facilitate the movement of the lithium-ion battery pack to the required location by the staff.

[0013] Furthermore, a PLC control panel is fixedly connected to the center of the upper end of the cover plate, and multiple external interfaces are fixedly connected to the lower end of the front outer wall of the housing.

[0014] Through the above technical solution, the PLC control panel fixedly connected to the upper part of the cover plate allows operators to easily control the operating status of the lithium-ion battery pack. With the BMS component, the battery status, such as the remaining power, can be displayed on the screen of the PLC control panel. The multiple external interfaces on the casing can be used to connect to external devices to supply power to them, or to connect to an external power source for charging. During charging and discharging, the BMS component monitors the status of the lithium-ion battery pack, such as temperature and voltage, and provides charging and discharging protection.

[0015] Furthermore, the outer walls on both sides of the rotating groove are rotatably connected to the rotating rod, and the front end of the reset spring is fixedly connected to the locking block;

[0016] The above technical solution uses a reset spring to act on the locking block, allowing the locking block to remain locked to the connecting block fixedly connected to the cover plate, thus preventing the cover plate from being opened.

[0017] Furthermore, the upper ends of the locking blocks all penetrate the fixing block and are locked together with the connecting block, and the lower ends of the actuating blocks all penetrate the rotating groove to the outside of the fixing block;

[0018] The above technical solution uses a reset spring to engage the locking block with the connecting block fixedly connected to the cover plate, thus keeping the cover plate closed. By pressing the actuating block, the locking block can be rotated along the rotating rod in the rotating groove, releasing the engagement between the locking block and the connecting block, allowing the cover plate to open.

[0019] Furthermore, a plurality of mounting grooves are provided in the middle of the front outer wall of the housing, and filter strips are fixedly connected to the inner walls on both sides of the mounting grooves;

[0020] The above technical solution involves multiple mounting slots on the outer casing, which are aligned with the heat spreader inside the casing. A filter strip is then fixedly connected within the mounting slot, allowing large foreign objects to be filtered out and clogging to be reduced when external airflow passes through.

[0021] Furthermore, the rear end of the heat spreader extends through the outer casing into the interior of the air duct frame, and the outer walls on both sides of the individual battery are in contact with the heat spreader.

[0022] The above technical solution involves attaching the heat spreader to the surface of the individual batteries in the lithium-ion battery pack, absorbing the heat generated by the individual batteries, and using a cooling fan to allow air to pass through multiple ventilation holes on the heat spreader to carry away the heat and reduce the temperature of the individual batteries.

[0023] This utility model has the following beneficial effects:

[0024] 1. This utility model proposes a lithium-ion battery pack with charge and discharge protection. The reset spring in the connecting mechanism acts on the locking block fixedly connected to the middle of the rotating rod, keeping the locking block engaged with the connecting block on the cover plate, thus fixing the cover plate. The actuating block fixedly connected to the lower end of the locking block drives the locking block to rotate along the rotating rod in the rotating groove, thereby releasing the locking state between the locking block and the connecting block. This facilitates the opening and closing of the cover plate, making it easier for operators to inspect the internal components of the lithium-ion battery pack after a fault or damage occurs, and reducing the difficulty of operation for operators.

[0025] 2. The lithium-ion battery pack with charge and discharge protection proposed in this utility model uses multiple heat dissipation plates in the heat dissipation mechanism to be in contact with the surface of the individual batteries in the lithium-ion battery pack, so as to evenly absorb the heat generated by the individual batteries. At the same time, multiple ventilation holes are opened on the heat dissipation plates to allow air to pass through, which also increases the contact area between the heat dissipation plates and the air. With the help of the cooling fan fixedly connected to the air duct frame, the external air is drawn in and discharged, so that the heat on the heat dissipation plates is carried away, the temperature of the individual batteries is reduced, and thus the heat dissipation capacity of the lithium-ion battery pack is improved. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the main structure of a lithium-ion battery pack with charge and discharge protection proposed in this utility model.

[0027] Figure 2 An exploded view of a lithium-ion battery pack with charge-discharge protection proposed in this utility model;

[0028] Figure 3 A cross-sectional view of the casing and air duct frame of a lithium-ion battery pack with charge and discharge protection proposed in this utility model.

[0029] Figure 4 This is an axial sectional view of the cover plate, outer shell, air duct frame, and fixing block of a lithium-ion battery pack with charge and discharge protection proposed in this utility model.

[0030] Figure 5 for Figure 4 Enlarged view of point A in the middle.

[0031] Legend:

[0032] 1. Housing; 2. BMS Components; 3. Handle; 4. Heat Dissipation Mechanism; 401. Mounting Slot; 402. Filter Strip; 403. Air Duct Frame; 404. Cooling Fan; 405. Heat Spread Plate; 406. Ventilation Hole; 407. Individual Battery; 5. External Interface; 6. PLC Control Panel; 7. Connection Mechanism; 701. Cover Plate; 702. Connecting Block; 703. Fixing Block; 704. Rotating Slot; 705. Rotating Rod; 706. Locking Block; 707. Return Spring; 708. Toggle Block. Detailed Implementation

[0033] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of specific embodiments. Obviously, the described specific embodiments are only a part of the specific embodiments of the present invention, and not all of them. Based on the specific embodiments of the present invention, all other specific embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Reference Figure 1 , Figure 2 , Figure 4 and Figure 5 This utility model provides a specific embodiment: a lithium-ion battery pack with charge and discharge protection, including a shell 1, a heat dissipation mechanism 4, and a connecting mechanism 7. The heat dissipation mechanism 4 is provided at the rear end of the shell 1, and the heat dissipation mechanism 4 includes multiple individual batteries 407. The connecting mechanism 7 is provided at the upper end of the shell 1, and the connecting mechanism 7 includes two fixing blocks 703 and two rotating rods 705. The rear ends of the fixing blocks 703 are fixedly connected to the shell 1. Air duct frames 403 are fixedly connected to both sides of the outer wall of the rear end of the shell 1. A cover plate 701 is hinged to the upper end of the air duct frame 403. Connecting blocks 702 are fixedly connected to both sides of the outer wall of the front end of the cover plate 701. Rotating grooves 704 are opened inside the fixing blocks 703. A locking block 706 is fixedly connected to the middle of the outer wall of the rotating rod 705. A return spring 707 is fixedly connected to the inner wall of the rear end of the rotating groove 704. A toggle block 708 is fixedly connected to the lower end of the locking block 706.

[0035] A BMS component 2 is fixedly connected to the lower end of one outer wall of the outer casing 1, and handles 3 are fixedly connected to the upper ends of both outer walls of the outer casing 1. The battery management system built into the BMS component 2 monitors the status of the lithium-ion battery pack, such as individual cell voltage, battery terminal temperature, battery circuit current, battery pack terminal voltage, and battery system insulation resistance. It can intelligently manage and maintain each battery cell, prevent overcharging and over-discharging, and extend the battery's lifespan. The two handles 3 fixedly connected to the outer casing 1 make it easy for workers to move the lithium-ion battery pack to the required location. A PLC control panel 6 is fixedly connected to the center of the upper end of the cover plate 701, and multiple external interfaces 5 are fixedly connected to the lower end of the front outer wall of the outer casing 1. The PLC control panel 6 fixedly connected to the upper end of the cover plate 701 allows workers to easily control the operating status of the lithium-ion battery pack. In conjunction with the BMS component 2, the battery status, such as the remaining power, can be displayed on the screen of the PLC control panel 6. The multiple external interfaces 5 on the outer casing 1 can be used to connect to external devices to provide power to them, or to connect to external devices. The power supply is connected for charging and discharging. During charging and discharging, the BMS component 2 monitors the status of the lithium-ion battery pack, such as temperature and voltage, and provides charge / discharge protection. The outer walls on both sides of the rotating slot 704 are rotatably connected to the rotating rod 705. The front ends of the return springs 707 are fixedly connected to the locking blocks 706. The return springs 707 act on the locking blocks 706, ensuring that the locking blocks 706 remain engaged with the connecting blocks 702 fixedly connected to the cover plate 701, preventing the cover plate 701 from being opened. The upper ends of the locking blocks 706 are... The fixed block 703 is connected to the connecting block 702. The lower end of the actuating block 708 passes through the rotating groove 704 to the outside of the fixed block 703. The return spring 707 acts on the locking block 706, so that the locking block 706 is connected to the connecting block 702 fixedly connected to the cover plate 701, thereby keeping the cover plate 701 in a closed state. By pressing the actuating block 708, the locking block 706 can be rotated along the rotating rod 705 in the rotating groove 704, releasing the locking state between the locking block 706 and the connecting block 702, so that the cover plate 701 can be opened.

[0036] Reference Figure 1 , Figure 2 and Figure 3 Cooling fans 404 are fixedly connected to both sides of the inner wall of the rear end of the air duct frame 403. Multiple heat dissipation plates 405 are fixedly connected to the bottom surface inside the outer shell 1. Multiple ventilation holes 406 are opened on the outer walls of the front and rear ends of the heat dissipation plates 405.

[0037] Multiple mounting slots 401 are provided in the middle of the front outer wall of the outer casing 1. Filter strips 402 are fixedly connected to the inner walls on both sides of the mounting slots 401. Through the multiple mounting slots 401 on the outer casing 1, the mounting slots 401 are aligned with the heat dissipation plate 405 inside the outer casing 1, and a filter strip 402 is fixedly connected in the mounting slot 401. When the external airflow flows, the filter strip 402 can filter out large foreign objects and reduce blockage. The rear end of the heat dissipation plate 405 extends through the outer casing 1 to the interior of the air duct frame 403. The outer walls on both sides of the battery individual 407 are in contact with the heat dissipation plate 405. By making the heat dissipation plate 405 in contact with the surface of the battery individual 407 in the lithium-ion battery pack, the heat generated by the battery individual 407 is absorbed. With the help of the cooling fan 404, air is forced through the multiple ventilation holes 406 on the heat dissipation plate 405 to remove the heat from the heat dissipation plate 405 and reduce the temperature of the battery individual 407.

[0038] Working Principle: When using this lithium-ion battery pack with charge / discharge protection, the operator first connects it to external equipment via the external interface 5 on the outer casing 1. The PLC control panel 6 on the cover 701 then starts the lithium-ion battery pack to power the external equipment. The battery management system built into the BMS component 2 monitors the status of the lithium-ion battery pack, such as individual cell voltage, battery terminal temperature, battery circuit current, battery pack terminal voltage, and battery system insulation resistance. This system intelligently manages and maintains each battery cell, preventing overcharging and over-discharging, and extending battery life. Secondly, multiple heat spreaders 405 are attached to the surface of the individual battery cells 407 in the lithium-ion battery pack, thus securing the individual battery cells 407. The generated heat is absorbed evenly, and the ventilation holes 406, together with the cooling fan 404, make the air flow, carrying away the heat from the heat spreader 405 and reducing the temperature of the individual battery 407. Finally, the operator can use the actuating block 708 fixedly connected to the lower end of the locking block 706 to drive the locking block 706 to rotate along the rotating rod 705 in the rotating groove 704, releasing the locking state between the locking block 706 and the connecting block 702, opening the cover plate 701 for internal inspection, and then closing the cover plate 701. The return spring 707 acts on the locking block 706 fixedly connected to the middle of the rotating rod 705, keeping the locking block 706 locked to the connecting block 702 on the cover plate 701, thus fixing the cover plate 701 and completing the inspection work.

[0039] 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 specific embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific 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 ion battery pack with charge and discharge protection, comprising a housing (1), a heat dissipation mechanism (4) and a connecting mechanism (7), characterized in that: The rear end of the shell (1) is provided with a heat dissipation mechanism (4), the upper end of the shell (1) is provided with a connecting mechanism (7), the rear end of the fixed block (703) is fixedly connected with the shell (1), the both sides of the outer wall of the rear end of the shell (1) are fixedly connected with an air duct frame (403), the upper end of the air duct frame (403) is hingedly connected with a cover plate (701), the both sides of the outer wall of the front end of the cover plate (701) are fixedly connected with a connecting block (702), the inner part of the fixed block (703) is provided with a rotating groove (704), the outer wall of the middle part of the rotating rod (705) is fixedly connected with a clamping block (706), the inner wall of the rear end of the rotating groove (704) is fixedly connected with a return spring (707), and the lower end of the clamping block (706) is fixedly connected with a pushing block (708).

2. A lithium ion battery pack with charge and discharge protection according to claim 1, characterized in that: The both sides of the inner wall of the middle part of the rear end of the air duct frame (403) are fixedly connected with a heat dissipation fan (404), and the bottom surface of the inner part of the shell (1) is fixedly connected with a plurality of vapor chamber plates (405).

3. The lithium ion battery pack with charge and discharge protection according to claim 1, characterized in that: The lower end of the outer wall of one side of the shell (1) is fixedly connected with a BMS assembly (2), and the upper end of the outer wall of the both sides of the shell (1) is fixedly connected with a handle (3).

4. The lithium-ion battery pack with charge and discharge protection according to claim 1, characterized in that: The center of the upper end of the cover plate (701) is fixedly connected with a PLC control panel (6), and the lower end of the outer wall of the front end of the shell (1) is fixedly connected with a plurality of external interfaces (5).

5. The lithium-ion battery pack with charge and discharge protection according to claim 1, characterized in that: The outer wall of the both sides of the rotating groove (704) is rotationally connected with the rotating rod (705), and the front end of the return spring (707) is fixedly connected with the clamping block (706).

6. The lithium-ion battery pack with charge and discharge protection according to claim 1, characterized in that: The upper end of the clamping block (706) penetrates through the fixed block (703) and is clampedly connected with the connecting block (702), and the lower end of the pushing block (708) penetrates through the rotating groove (704) to the outside of the fixed block (703).

7. The lithium-ion battery pack with charge and discharge protection according to claim 2, characterized in that: The middle part of the outer wall of the front end of the shell (1) is provided with a plurality of mounting grooves (401), and the inner wall of the both sides of the mounting groove (401) is fixedly connected with a filter screen strip (402).

8. The lithium ion battery pack with charge and discharge protection of claim 2, wherein: The rear end of the vapor chamber plate (405) penetrates through the shell (1) to the inside of the air duct frame (403), and the outer wall of the both sides of the vapor chamber plate (405) is attached to the vapor chamber plate (405).

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