Multi-module lithium battery box

Abstract

This utility model discloses a multi-module lithium battery case, relating to the field of battery case technology. It includes a case shell with a cover on top. Multiple annular cavities are formed on the inner side of the top of the cover. A retaining ring is movably embedded in the inner side of each annular cavity. A vertical cylinder is formed on the inner wall of the retaining ring. Multiple ventilation holes are formed on the outer wall of the top of the vertical cylinder. A retaining frame is fixedly connected to the bottom of the cover. A cavity is formed on the inner side of the case shell. Multiple partitions are fixedly connected to the inner wall of the cavity. Each partition has a cavity on both sides. A telescopic spring is installed inside each cavity. A flat plate is placed on top of the telescopic spring. A battery module is placed on top of the flat plate. This utility model, through a series of structural features, reduces the probability of the battery module colliding with the bottom of the case, thus facilitating the removal of the battery from the case and reducing the probability of the case exploding, thereby improving the safety factor of the case during use.

Description

Technical Field

[0001] This utility model relates to the field of battery housing technology, specifically a multi-module lithium battery housing. Background Technology

[0002] A multi-module lithium battery enclosure refers to placing multiple lithium battery modules in the same enclosure to form a larger power system, enabling the parallel connection of multiple lithium batteries to meet the power supply needs of new energy equipment. At the same time, it can protect the battery modules and extend their service life.

[0003] However, when placing lithium battery modules into existing enclosures, the internal cavity designed to fit the module's dimensions causes the module to slide directly down the cavity to the bottom of the enclosure's outer shell. If the module slides down too quickly, its bottom can collide with the bottom of the enclosure. Furthermore, once fully inserted, the module is flush with the top of the cavity, making it difficult to remove. Additionally, existing enclosures are typically designed with a sealed structure to enhance battery protection. If the battery experiences thermal runaway and releases gas through the explosion-proof valve, the enclosure cannot expel the released gas, causing it to accumulate inside. This increased pressure within the enclosure can easily lead to spontaneous explosion. Utility Model Content

[0004] The purpose of this invention is to provide a multi-module lithium battery housing to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a multi-module lithium battery case, including a case shell, a case cover on the top of the case shell, multiple annular cavities on the inner side of the top of the case cover, a retaining ring movably embedded in the inner side of the annular cavity, a vertical cylinder on the inner wall of the retaining ring, multiple ventilation holes on the outer wall of the top of the vertical cylinder, a retaining frame fixedly connected to the bottom of the case cover, a cavity on the inner side of the case shell, multiple partitions fixedly connected to the inner wall of the cavity, a partition cavity on both sides of the partition, a telescopic spring inside the partition cavity, a flat plate on the top of the telescopic spring, a battery module placed on the top of the flat plate, a sliding groove on the top of the partition, and a sliding strip slidably connected to the inner side of the sliding groove.

[0006] Preferably, the bottom end of the vertical cylinder has a circular hole, through which the vertical cylinder communicates with the interior of the cavity, and the vertical cylinder is slidably connected to the box cover by a retaining ring.

[0007] Preferably, the outer wall of the housing has a first screw hole, and the outer wall of the card frame has a second screw hole, with screws threaded through the inner walls of the first and second screw holes.

[0008] Preferably, the top of the box shell has a slot, the slot frame is fitted into the slot, and the box cover is movably connected to the box shell by screws and the slot frame.

[0009] Preferably, the slider is slidably connected to the battery module via a groove, and a connecting strip is provided at the top of the battery module.

[0010] Preferably, the top end of the telescopic spring is fixedly connected to the bottom end of the plate, the bottom end of the telescopic spring is fixedly connected to the bottom surface of the cavity, and the plate is slidably connected to the cavity through the telescopic spring.

[0011] Preferably, the battery module is slidably connected to the cavity via a flat plate.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. This multi-module lithium battery case, through the design of a flat plate, telescopic spring, sliding groove, and sliding bar, ensures that after a single battery module is placed into its corresponding cavity within the case, the bottom of the battery module is supported by the flat plate and the telescopic spring at the bottom of the flat plate, reducing the probability of the battery module colliding with the bottom of the case. Simultaneously, after the battery module is placed into the cavity, the top of the battery is limited by the sliding bar that slides along the sliding groove, thus pressing the battery module firmly into the cavity. At this time, the telescopic spring is in a compressed state. When it is necessary to remove the battery, pushing open the sliding bar allows the battery module to slide upwards along the cavity and protrude from the top of the cavity, making it easy to remove the battery from the case.

[0014] 2. This multi-module lithium battery enclosure, through its vertical cylinder, annular cavity, retaining ring, and vent, ensures that under normal conditions, the top surface of the vertical cylinder remains flush with the top surface of the enclosure cover, keeping the enclosure sealed. When the lithium battery inside the enclosure releases gas through the explosion-proof valve due to thermal runaway, gas will accumulate inside the enclosure. As the gas increases, the pressure inside the enclosure will rise, pushing the retaining ring on the outside of the vertical cylinder to slide upwards along the annular cavity, exposing the vent on the top outer wall of the vertical cylinder. This releases the gas inside the enclosure to the outside, thereby reducing the probability of spontaneous explosion and improving the safety factor of the enclosure during use. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the slider and partition structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the vertical tube and card frame structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the slide and retaining ring structure of this utility model;

[0019] Figure 5 This is a schematic diagram of the slide groove and telescopic spring structure of this utility model.

[0020] In the diagram: 1. Box cover; 2. Vertical cylinder; 3. Box shell; 4. Screw; 5. First screw hole; 6. Slot; 7. Cavity; 8. Sliding strip; 9. Battery module; 10. Connecting strip; 11. Partition plate; 12. Partition cavity; 13. Frame; 14. Second screw hole; 15. Vent hole; 16. Flat plate; 17. Telescopic spring; 18. Annular cavity; 19. Snap ring; 20. Sliding groove. Detailed Implementation

[0021] 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.

[0022] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] like Figures 1 to 5As shown, the multi-module lithium battery box in this embodiment includes a box shell 3, a box cover 1 on the top of the box shell 3, multiple annular cavities 18 on the inner side of the top of the box cover 1, a retaining ring 19 movably embedded in the inner side of the annular cavity 18, a vertical cylinder 2 on the inner wall of the retaining ring 19, multiple ventilation holes 15 on the outer wall of the top of the vertical cylinder 2, a retaining frame 13 fixedly connected to the bottom of the box cover 1, a cavity 7 on the inner side of the box shell 3, multiple partitions 11 fixedly connected to the inner wall of the cavity 7, a partition 12 on both sides of the partition 11, a telescopic spring 17 inside the partition 12, a flat plate 16 on the top of the telescopic spring 17, a battery module 9 placed on the top of the flat plate 16, a sliding groove 20 on the top of the partition 11, and a sliding strip 8 slidably connected to the inner side of the sliding groove 20.

[0025] Specifically, the top of the housing 3 has an opening for inserting and removing the lithium battery module 9. The size of the cover 1 matches the size of the opening at the top of the housing 3, allowing the cover 1 to close the opening and create a sealed space inside the housing. The inner diameter of the annular cavity 18 matches the outer diameter of the retaining ring 19, allowing the retaining ring 19 to slide smoothly up and down along the annular cavity 18. This, in turn, allows the vertical cylinder 2 to slide up and down along the top of the cover 1, opening the vent 15 on the outer wall of the vertical cylinder 2. The vent 15 communicates with the interior of the vertical cylinder 2, allowing air inside the housing to escape through the vent 15. The retaining frame 1... The function of 3 is to achieve the clamping between the cover 1 and the shell 3, thereby facilitating the subsequent connection and fixation of the cover 1 and the shell by the screw 4. The function of the partition 11 is to separate the battery modules 9 inside the shell, thereby reducing the interference between adjacent lithium battery modules 9. The depth of the cavity 12 is greater than the height of the lithium battery module 9, so that the telescopic spring 17 inside the cavity 12 has enough space to deform. The function of the slide groove 20 is to realize the sliding of the slide bar 8 on the top of the partition 11. The bottom end of the slide bar 8 bends towards the inner wall of the slide groove 20, so that the slide bar 8 can maintain the connection with the slide groove 20, thereby realizing the pressing and limiting of the slide bar 8 on the battery module 9.

[0026] Furthermore, a round hole is provided at the bottom of the vertical cylinder 2, through which the vertical cylinder 2 communicates with the interior of the cavity 7. The vertical cylinder 2 is slidably connected to the box cover 1 by a retaining ring 19. The function of the round hole is to allow the gas in the cavity 7 to smoothly enter the vertical cylinder 2 and lift the vertical cylinder 2, thereby facilitating the depressurization of the box and reducing the probability of the box exploding spontaneously.

[0027] Furthermore, the outer wall of the housing 3 is provided with a first screw hole 5, and the outer wall of the frame 13 is provided with a second screw hole 14. The inner walls of the first screw hole 5 and the second screw hole 14 are threaded with screws 4. The function of the screws 4 is to lock and fix the cover 1 to the top of the housing 3 through the first screw hole 5 and the second screw hole 14, so that the housing can maintain its overall state.

[0028] Furthermore, a slot 6 is provided at the top of the casing 3, and the slot 6 is fitted into the frame 13. The cover 1 is movably connected to the casing 3 by screws 4 and the frame 13. The slot 6 is engaged with the frame 13, so that the cover 1 can be tightly connected to the top of the casing 3 through the frame 13, thereby improving the stability of the connection between the cover 1 and the casing 3.

[0029] Furthermore, the slider 8 is slidably connected to the battery module 9 through the slide groove 20. The top of the battery module 9 is provided with a connecting strip 10. When the slider 8 slides along the slide groove 20 toward the top of the cavity 12, it can contact the battery module 9 placed in the cavity 12 and press the battery module 9 into the cavity 12, thereby achieving temporary locking of the battery module 9 in the cavity 12.

[0030] Furthermore, the top end of the telescopic spring 17 is fixedly connected to the bottom end of the plate 16, and the bottom end of the telescopic spring 17 is fixedly connected to the bottom surface of the cavity 12. The plate 16 is slidably connected to the cavity 12 through the telescopic spring 17. After deformation, the telescopic spring 17 can push the plate 16 to slide up and down along the cavity 12, thereby supporting and pushing out the battery module 9.

[0031] Furthermore, the battery module 9 is slidably connected to the cavity 12 via the plate 16. The bottom of the battery module 9 and the top of the plate 16 are both smooth surfaces, which makes the coefficient of friction of the battery module 9 when it comes into contact with the plate 16 small, thereby reducing the wear generated when the battery module 9 comes into contact with the plate 16.

[0032] The usage method of this embodiment is as follows: When using this multi-module lithium battery box, a single lithium battery module 9 needs to be placed into the corresponding cavity 12 first. After the lithium battery module 9 slides down along the cavity 12 and contacts the flat plate 16 at the bottom of the inner side of the cavity 12, the lithium battery module 9 needs to be pressed down, so that the lithium battery module 9 pushes the flat plate 16 and the telescopic spring 17 down, so that the telescopic spring 17 is squeezed and deformed until the lithium battery module 9 is pressed down to be flush with the top of the partition plate 11. Then, the sliders 8 located at both ends of the slide groove 20 can be pushed upwards towards the cavity 12 and contacted with the top of the lithium battery module 9 in the cavity 12. Then, the lithium battery module 9 is released. At this time, the lithium battery module 9 will be pressed tightly into the cavity 12 by the sliders 8. This completes the placement of the lithium battery module 9. After all the lithium battery modules are placed... After the lithium battery module 9 is placed inside the box, it needs to be connected by the connecting strip 10. Then the box cover 1 can be closed, so that the clip frame 13 at the bottom of the box cover 1 is embedded in the clip slot 6. Then the screw 4 can be screwed into the first screw hole 5 and the second screw hole 14, so that the box cover 1 is locked to the top of the box shell 3. When the lithium battery module 9 inside the box releases gas through the explosion-proof valve due to thermal runaway, it will accumulate in the cavity 7 of the box. When the air pressure in the cavity 7 reaches the set value, the vertical cylinder 2 at the top of the box cover 1 will be pushed up by the increased air pressure, so that the retaining ring 19 on the outside of the vertical cylinder 2 slides up along the inner side of the annular cavity 18. At this time, the vent hole 15 on the outer wall of the vertical cylinder 2 will protrude from the top of the box cover 1. Then the gas accumulated inside the box will enter the vertical cylinder 2 and finally be discharged from the box through the vent hole 15 on the outer wall of the vertical cylinder 2.

[0033] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the 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 this utility model should be included within the protection scope of this utility model.

Claims

1. A multi-module lithium battery housing, comprising a housing shell (3), characterized in that: The top of the box shell (3) is provided with a box cover (1). Multiple annular cavities (18) are opened on the inner side of the top of the box cover (1). A retaining ring (19) is movably embedded in the inner side of each annular cavity (18). A vertical cylinder (2) is provided on the inner wall of the retaining ring (19). Multiple ventilation holes (15) are opened on the outer wall of the top of the vertical cylinder (2). A retaining frame (13) is fixedly connected to the bottom of the box cover (1). A cavity (7) is opened on the inner side of the box shell (3). The inner wall of the cavity (7) is fixedly connected with multiple partitions (11). Each partition (11) has a cavity (12) on both sides. The cavity (12) is equipped with a telescopic spring (17). The top of the telescopic spring (17) is equipped with a flat plate (16). A battery module (9) is placed on the top of the flat plate (16). The top of the partition (11) is provided with a sliding groove (20). A sliding strip (8) is slidably connected to the inner side of the sliding groove (20).

2. The multi-module lithium battery housing according to claim 1, characterized in that: The bottom end of the vertical cylinder (2) is provided with a round hole, and the vertical cylinder (2) communicates with the interior of the cavity (7) through the round hole. The vertical cylinder (2) is slidably connected to the box cover (1) through a retaining ring (19).

3. The multi-module lithium battery housing according to claim 1, characterized in that: The outer wall of the housing (3) is provided with a first screw hole (5), and the outer wall of the frame (13) is provided with a second screw hole (14). The inner walls of the first screw hole (5) and the second screw hole (14) are threaded with screws (4).

4. The multi-module lithium battery housing according to claim 1, characterized in that: The top of the box shell (3) is provided with a slot (6), the slot frame (13) is fitted and connected to the slot (6), and the box cover (1) is movably connected to the box shell (3) by screws (4) and the slot frame (13).

5. A multi-module lithium battery housing according to claim 1, characterized in that: The slide bar (8) is slidably connected to the battery module (9) through the slide groove (20), and the top of the battery module (9) is provided with a connecting bar (10).

6. A multi-module lithium battery housing according to claim 1, characterized in that: The top end of the telescopic spring (17) is fixedly connected to the bottom end of the plate (16), and the bottom end of the telescopic spring (17) is fixedly connected to the bottom surface of the cavity (12). The plate (16) is slidably connected to the cavity (12) through the telescopic spring (17).

7. A multi-module lithium battery housing according to claim 1, characterized in that: The battery module (9) is slidably connected to the cavity (12) via a flat plate (16).

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