Protective device of battery assembly

Abstract

The utility model provides a protection device of a battery assembly, which relates to the technical field of batteries and comprises an outer box, a protection assembly is arranged in the outer box and comprises an air bag, the outer side of the air bag is arranged on the inner wall of the outer box, an air cavity is formed in the air bag, and one end, far away from the air bag, of the air cavity is fixedly connected with a plurality of convex points. Mounting holes are formed in the two sides of the top end of the air bag, internal buffering is provided through air inflation of an air cavity of the air bag, impact energy from the outside is effectively absorbed, the multiple protection functions are achieved through the design, firstly, the physical buffering effect is achieved, and battery damage caused by external impact is reduced; and secondly, the safety of the battery under the condition of abnormal high temperature or fire disaster is improved through fireproof protection, the anti-collision performance is improved, the fireproof function is added, and the system can quickly take away heat from key components such as a battery cell and the like through effective air flow and heat transfer, so that the heat is prevented from being accumulated in the box body.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a protection device for a battery assembly. Background Art

[0002] Batteries are widely used in daily life, including for powering various electronic devices such as mobile phones, laptops, watches, etc., as well as for vehicle starting, lighting, backup power, etc. They come in various types, including common alkaline batteries, lithium batteries, lead-acid batteries, etc., and each type has different characteristics and application scenarios.

[0003] The existing patent CN217641718U discloses a battery assembly, including a housing and a cover plate. The housing and the cover plate are detachably connected. A liquid injection structure with one-way conduction is provided on the cover plate. A liquid injection port is provided on the liquid injection structure, and the liquid injection structure is driven by an external force to open or close the liquid injection port. The battery assembly of the utility model has a liquid injection structure with one-way conduction at the liquid injection port, with a safe and reliable structure, convenient assembly, good sealing performance, simplified process flow, and improved production efficiency and product quality.

[0004] This patent aims to solve the problem that the battery will expand during the working cycle, and when the battery expands, a force will be generated between the battery and the heat exchange plate, which will further lead to the failure of the connection between the conductive busbar and the battery. By setting a buffer part on the conductive busbar, the buffer part can absorb part of the battery expansion, which can further reduce the impact of battery expansion on the heat exchange plate, and the heat exchange plate can fully exert its heat exchange capacity to absorb the battery heat in time. However, this patent still has the following deficiencies. For example, some existing battery assemblies cannot effectively absorb the impact energy from the outside world, which causes the impact energy to be transferred to the battery itself, thus increasing the risk of battery damage or internal electrolyte leakage.

[0005] Therefore, the utility model provides a protection device for a battery assembly. Summary of the Utility Model

[0006] The purpose of the utility model is to solve the deficiencies existing in the prior art and provide a protection device for a battery assembly.

[0007] To achieve the above purpose, the utility model adopts the following technical scheme: A protection device for a battery assembly, including an outer box, a protection component is arranged inside the outer box, and a heat dissipation component is fixedly connected to the bottom end of the outer box;

[0008] The protection component includes an airbag, the outer side of the airbag is arranged on the inner wall of the outer box, an air cavity is opened inside the airbag, a bump is fixedly connected to one end of the air cavity away from the airbag, and mounting holes are opened on both sides of the top end of the airbag;

[0009] The protection component includes an airbag, the outer side of the airbag is arranged on the inner wall of the outer box, an air cavity is opened inside the airbag, a plurality of bumps are fixedly connected to one end of the air cavity away from the airbag, and mounting holes are opened on both sides at the top end of the airbag.

[0010] As a preferred embodiment, a partition layer is arranged on the inner wall of the airbag, and battery cores are arranged inside the partition layer.

[0011] The technical effect of adopting the above further scheme is that: the design of the airbag provides a buffer area inside the outer box, which can absorb and disperse the external impact force, reducing the direct impact on the battery cores. The multiple bumps inside the air cavity enhance the structural stability of the airbag, enabling the impact force to be more evenly dispersed, thereby protecting the internal battery cores from damage. And adding a fireproof material to the airbag or the partition layer improves the safety protection ability of the battery in case of overheating.

[0012] As a preferred embodiment, the outer sides of the positive and negative electrodes of the battery core penetrate through the mounting holes and extend outwards.

[0013] The technical effect of adopting the above further scheme is that: it realizes a more stable connection and improves the current conduction efficiency.

[0014] As a preferred embodiment, the protection component further includes dry powder, and the dry powder is arranged in the air cavity.

[0015] The technical effect of adopting the above further scheme is that: by arranging the dry powder in the air cavity, a layer of isolation can be provided to prevent the battery from burning due to overheating.

[0016] As a preferred embodiment, the heat dissipation component includes a bottom plate, the top end of the bottom plate is fixedly connected to the outer box, flow guiding plates are fixedly connected to both sides at the bottom end of the bottom plate, a fan is installed at the bottom end of the inner wall of the bottom plate, and fins are arranged at the bottom end of the airbag.

[0017] The technical effect of adopting the above further scheme is that: effectively disperses the generated heat to the entire surface of the airbag. This helps to prevent local heat accumulation, and at the same time can provide sufficient air flow to effectively promote heat dissipation.

[0018] As a preferred embodiment, the bottom end of the fins penetrates through the bottom plate and extends towards the flow guiding plates.

[0019] The technical effect of adopting the above further scheme is that: helps to optimize the heat transfer efficiency, enabling the fins to more effectively dissipate heat to the external environment.

[0020] Compared with the prior art, the advantages and positive effects of the present utility model are that

[0021] By setting the structure of the protection component, the air chamber of the airbag provides internal buffering through inflation, effectively absorbing the impact energy from the outside world and preventing this energy from being directly transmitted to the battery core. In addition, the dry powder in the airbag can quickly cover the battery core when a fire occurs in the battery, forming a protective layer to play a role in extinguishing the fire. Subsequently, through the rotation of the fan, the heat carried out by the fins is transferred out of the interior of the battery core to prevent the internal temperature from being too high. Such a design realizes multiple protection functions. Firstly, the physical buffering effect reduces battery damage caused by external impacts. Secondly, the fire protection improves the safety of the battery in case of abnormal high temperature or fire. It not only improves the anti-collision performance but also increases the fire prevention function. And through effective air flow and heat transfer, the system can quickly take away the heat from key components such as the battery core, avoiding the accumulation of heat inside the box. Description of the Drawings

[0022] Figure 1 Internal schematic diagram of the protection component of a protection device for a battery component provided by the present utility model;

[0023] Figure 2 Cross-sectional view of the outer box of a protection device for a battery component provided by the present utility model;

[0024] Figure 3 Three-dimensional view of a protection device for a battery component provided by the present utility model;

[0025] Figure 4 Exploded view of the heat dissipation component of a protection device for a battery component provided by the present utility model.

[0026] Legend Explanation:

[0027] 1. Outer box;

[0028] 2. Protection component; 21. Airbag; 22. Air chamber; 23. Bump; 24. Dry powder; 25. Mounting hole;

[0029] 3. Partition;

[0030] 4. Heat dissipation component; 41. Bottom plate; 42. Deflector; 43. Fan; 44. Fin;

[0031] 5. Battery core. Detailed Implementation Modes

[0032] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0033] As Figure 1 shown in Figure 2 Figure , this embodiment provides a technical solution: a protection device for a battery assembly, including an outer box 1. A protection component 2 is arranged inside the outer box 1. The protection component 2 includes an airbag 21. The outer side of the airbag 21 is arranged on the inner wall of the outer box 1. An air chamber 22 is opened inside the airbag 21. A plurality of bumps 23 are fixedly connected to one end of the air chamber 22 away from the airbag 21. The materials of the airbag 21 and the bumps 23 are both polyester fiber. Installation holes 25 are opened on both sides of the top end of the airbag 21. The airbag 21 is arranged on the inner wall of the outer box 1, forming a protective layer with the outer box 1. There is an air chamber 22 inside the airbag 21, whose function is to provide internal buffering and protection effects by inflating. The existence of the bumps 23 can enhance the structural stability of the airbag 21, provide more uniform supporting force, and help the airbag 21 maintain its shape and position. This connection method ensures that the airbag 21 can effectively withstand external pressure and impact, thereby providing a more reliable protection effect. At the same time, the materials of the airbag 21 and the bumps 23 are both polyester fiber, with a relatively high melting point, ensuring that it is higher than the temperature of the battery during normal use. The function of the installation holes 25 is to facilitate fixing the protection device at a specific position of the battery assembly, ensuring the perfect fit between the device and the battery, thereby providing the best protection effect.

[0034] Furthermore, as Figure 1 shown in Figure : A partition layer 3 is arranged on the inner wall of the airbag 21. A battery core 5 is arranged inside the partition layer 3. Positive and negative electrodes are installed on both sides of the top end of the battery core 5. The outer sides of the positive and negative electrodes 4 penetrate through the installation holes 25 and extend outwards. The partition layer 3 is used to separate the space inside the airbag 21 to ensure that the battery core 5 can be stably arranged therein. The battery core 5 is the core part of the battery assembly, which contains the main electrochemical reactions and energy storage functions of the battery. By arranging the battery core 5 in the partition layer 3 inside the airbag 21, it can be ensured that it is in a stable position in the battery assembly. The positive and negative electrodes 4 are the electrode parts of the battery, used to connect to the external circuit to supply power or receive charge. The installation holes 25 are used to fix the positive and negative electrodes 4 to ensure the stable and reliable connection between them and the battery core 5. Through the design of penetrating the installation holes 25, the assembly process can be simplified, and additional support can be provided.

[0035] To solve the problem of potential safety hazards caused by fires occurring inside the battery, as Figure 1 shown in Figure 2 It should be noted that in the above translation, the specific figure numbers in the original text are replaced with placeholders like and as they are not clear in the provided text. You may need to substitute the actual figure numbers according to the real situation.As shown in the figure: The protection component 2 further includes dry powder 24. The dry powder 24 is arranged in the air cavity 22. The dry powder 24 in the air cavity 22 is blown towards the battery core 5 from the bump 23. The presence of the dry powder 24 plays multiple roles in the air cavity 22. Firstly, it can fill the space of the air cavity 22, increasing the fullness of the airbag 21, thereby improving the buffering effect and protection performance of the airbag 21. Secondly, the dry powder 24 can also form a uniform protective layer in the air cavity 22, further enhancing the protection of the battery core 5. The dry powder 24 in the air cavity 22 is blown towards the battery core 5 from the bump 23, and this process realizes the coverage and protection of the battery core 5 by the dry powder 24. When a fire occurs inside the battery, due to the relatively high melting point of the bump 23, after the partition board melts, the heat is transferred to the bump 23, and the dry powder 24 in the airbag 21 can be released from the bump 23 and move towards the battery core 5, forming a uniform dry powder 24 protective layer, which can extinguish the fire of the battery.

[0036] To solve the problem that heat accumulates inside the outer box 1 and the airbag 21 does not have enough heat support to protect the internal battery core 5, as Figure 3 shown in Figure 4 the figure: The heat dissipation component 4 includes a bottom plate 41. The top end of the bottom plate 41 is fixedly connected to the outer box 1. Both sides of the bottom end of the bottom plate 41 are fixedly connected with diversion plates 42. A fan 43 is installed at the bottom end of the inner wall of the bottom plate 41. A plurality of heat dissipation components 4 are arranged at the bottom end of the airbag 21. The bottom end of the fin 44 penetrates through the bottom plate 41 and extends towards the diversion plate 42. The design of the bottom plate 41 provides a stable support point, and the diversion plates 42 at the bottom can divert the heat of the battery core 5. The design of the fan 43 is to increase the flow rate, and due to the large surface area, the fin 44 can quickly dissipate the heat into the surrounding cold air.

[0037] Working principle:

[0038] As Figure 1 shown in Figure 4 the figure:

[0039] In use: First, the air chamber 22 is filled with air to provide internal buffering and protection. Subsequently, the fixed connection of multiple bumps 23 on the airbag 21 enhances the structural stability of the airbag 21 and provides uniform supporting force to help the airbag 21 maintain its shape and position, thus ensuring that the airbag 21 can effectively withstand external pressure and impact. Then, the partition layer 3 inside the airbag 21 is used to divide the space of the airbag 21 and securely place the battery core 5 to ensure that the core part of the battery, i.e., the battery core 5, is in a safe and stable position therein. Secondly, the positive and negative electrodes 4 of the battery core 5 extend and are fixed through the mounting holes 25, and such a design simplifies the assembly process and provides additional support. Finally, in the event of an internal battery fire, the heat first melts the partition board and then transfers to the bumps 23. At this time, the dry powder 24 inside the airbag 21 is released towards the battery core 5 through the bumps 23 to form a uniform dry powder 24 protection layer, achieving instant protection and fire extinguishing effects on the battery core 5. When the battery is in use, in order to reduce the internal heat, when heat is generated, it is transferred to the bottom plate 41 through the fins 44. The rotation of the flow guide plate 42 drives the hot air inside the bottom plate 41 to be blown outwards through the fan 43, and when the fins 44 conduct heat, it is transferred to the airbag 21, causing the airbag 21 to expand, thereby increasing the protection effect.

[0040] The above are only the preferred embodiments of the present invention and do not limit the present invention in other forms. Any person skilled in the art may use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, as long as it does not depart from the technical solution content of the present invention, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A protective device for a battery assembly, comprising an outer box (1), characterized in that: A protection component (2) is disposed inside the outer box (1), and a heat dissipation component (4) is fixedly connected to the bottom end of the outer box (1); The protection component (2) comprises an airbag (21), the outer side of the airbag (21) is arranged on the inner wall of the outer box (1), an air cavity (22) is provided inside the airbag (21), a protrusion (23) is fixedly connected to one end of the air cavity (22) away from the airbag (21), and mounting holes (25) are provided on both sides of the top end of the airbag (21).

2. A protective device for a battery assembly according to claim 1, characterized in that: The inner wall of the air bag (21) is provided with a partition layer (3), and a battery core (5) is provided inside the partition layer (3).

3. A protective device for a battery assembly according to claim 2, characterized in that: The outer sides of the positive and negative electrodes of the battery core (5) penetrate the mounting hole (25) and extend outward.

4. A protective device for a battery assembly according to claim 1, characterized in that: The protection component (2) further comprises dry powder (24), wherein the dry powder (24) is arranged in the air cavity (22).

5. The protective device for a battery assembly according to claim 1, characterized in that: The heat dissipation assembly (4) comprises a bottom plate (41), the top end of the bottom plate (41) is fixedly connected to the outer box (1), both sides of the bottom end of the bottom plate (41) are fixedly connected to guide plates (42), a fan (43) is installed at the bottom end of the inner wall of the bottom plate (41), and a fin (44) is arranged at the bottom end of the air bag (21).

6. A battery assembly protection device according to claim 5, characterized in that: The bottom end of the fin (44) passes through the bottom plate (41) and extends toward the guide plate (42).

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