Waterproof lithium battery with protection assembly on surface

Abstract

The invention discloses a waterproof lithium battery with a protection component on the surface, the waterproof lithium battery with the protection component on the surface comprises a box body, the bottom of the box body is provided with a cooling component, the inner wall of the box body is fixedly connected with a placing plate, and the top of the placing plate is provided with a lithium battery body; a plurality of air outlet holes are formed in the inner wall of the box body, a movable door is rotationally arranged on one side of the box body, the cooling assembly comprises a box body arranged at the bottom of the box body, a cooling cavity is formed in the box body, a fan is fixedly installed at the bottom in the box body, the exhaust end of the fan communicates with an air outlet pipe, and the air outlet pipe communicates with the box body. The two ends of the air outlet pipe communicate with the two sides of the cooling cavity, a cooling pipe is installed in the cooling cavity, and a cooling plate is arranged on the inner wall of the cooling cavity. According to the lithium battery, efficient heat dissipation of the lithium battery and reliable protection of internal elements are realized through the integrated air-cooling and liquid-cooling mixed heat dissipation system and the elastic buffer fixing structure.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lithium batteries, in particular to a waterproof lithium battery provided with a protection assembly on the surface. BACKGROUND

[0002] As a high-efficiency and high-energy-density energy storage device, lithium batteries have been widely used in electric vehicles, outdoor energy storage equipment, ships and special industries. However, the lithium battery pack has very strict requirements on the working environment, and its performance and safety are seriously affected by temperature, vibration and moisture. Among them, the waterproof performance is the lifeline to ensure the safe operation of lithium batteries. Once the electrodes and internal circuits of lithium batteries come into contact with water or moisture, short circuit, electrolyte leakage and material corrosion may easily occur, and even thermal runaway may be caused, resulting in disastrous accidents such as fire and explosion. Therefore, it is crucial to provide reliable waterproof protection for lithium batteries.

[0003] At present, the existing technology mainly adopts the following schemes to solve the waterproof problem of lithium batteries, but all of them have obvious defects: a sealing ring or sealing glue is used for waterproofing at the joint of the box body, which can only achieve the basic anti-splashing level and cannot cope with severe environments such as heavy rain, water or high humidity. In addition, the sealing material is prone to aging, and the waterproof performance will decrease significantly after long-term use; the entire battery pack is completely sealed with epoxy resin or other materials, which can achieve a very high waterproof level, but it increases the weight and volume of the battery pack. In addition, the sealing material is a poor conductor of heat, which seriously hinders the dissipation of heat during battery operation and easily causes heat accumulation; a completely sealed metal or high-strength plastic shell is designed, which is the current mainstream scheme, but waterproofing and heat dissipation are difficult to achieve. In order to ensure the sealing, the shell cannot have heat dissipation holes, which makes the heat generated inside the battery only conduct through the shell, resulting in low heat dissipation efficiency and difficulty in meeting the heat dissipation needs of high-power battery packs. In order to dissipate heat, holes or fans are installed on the shell, which will damage the overall sealing and waterproof performance. SUMMARY

[0004] The purpose of this section is to summarize some aspects of the embodiments of the present application and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract and title of the specification to avoid obscuring the purpose of this section, abstract and title. Such simplifications or omissions cannot be used to limit the scope of the present application.

[0005] In view of the above and / or existing problems in the prior art, the present application is proposed.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0007] The utility model provides a waterproof lithium battery with a protection assembly arranged on the surface, which comprises a box body provided with a cooling assembly at the bottom, a placing plate fixedly connected to the inner wall of the box body, a lithium battery body mounted on the top of the placing plate, a plurality of air outlets formed in the inner wall of the box body, and a movable door rotatably arranged on one side of the box body.

[0008] Further, the cooling assembly comprises a box arranged at the bottom of the box body, a cooling cavity formed in the box, a fan fixedly mounted on the inner bottom of the box, an air outlet pipe communicated with the air exhaust end of the fan, the air outlet pipe communicated with both sides of the cooling cavity at both ends, a cooling pipe mounted in the cooling cavity, and a cooling plate arranged on the inner wall of the cooling cavity.

[0009] Further, the top of the placing plate is fixedly connected with a fixing cylinder, and the inner wall of the fixing cylinder is slidably provided with a fixing rod.

[0010] Further, the bottom of the fixing rod is fixedly connected with a spring, the bottom of the spring is fixedly connected with a pressing plate, and the bottom of the pressing plate is attached to the top of the lithium battery body.

[0011] Further, the fixing cylinder is screwed with a positioning bolt, and one end of the positioning bolt is abutted with one side of the fixing rod.

[0012] Further, a cavity is formed in the box body, the air outlets are communicated with the cavity, an air outlet is formed in the top of the box, and the air outlet is communicated with the cavity.

[0013] Further, one end of the fan is communicated with an air inlet pipe, and a dust screen is arranged on the inner wall of the cooling cavity close to the air outlet pipe.

[0014] Further, a circulating pump is arranged in the cooling cavity, one end of the circulating pump is communicated with a liquid tank through a pipeline, the other end of the circulating pump is communicated with one end of the cooling pipe, and the other end of the cooling pipe is communicated with one side of the liquid tank.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] Through the mixed cooling mode of combining air cooling with liquid cooling, the air forcedly blown by the fan is secondarily cooled by the cooling plate to form cold air, which greatly enhances the heat dissipation capacity, and this mode has the dual advantages of fast air cooling response and strong liquid cooling capacity, can quickly and effectively discharge the heat generated by the battery, ensures that the battery works in the best temperature range, through the cooperation of the spring and the pressing plate, a continuous and flexible clamping force is provided for the battery, which can effectively absorb and buffer the vibration and impact from the outside, prevent the elements from loosening or being damaged, greatly improve the running stability and service life of the battery system under complex working conditions, the cooling assembly and the protection assembly are integrated in the box body, the structure is compact. The liquid cooling pipeline and the electrical elements are effectively isolated, combined with the waterproof design of the box body, multiple protections are provided for the electrical safety of the system, and the safety hidden danger caused by liquid leakage or external moisture is avoided.

[0017] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent to those skilled in the art from the description, or can be learned by practice of the present application. The objects and other advantages of the present application can be realized and attained by the structure particularly pointed out in the written description and the accompanying drawings.

[0018] The technical solutions of the present application will be further described in detail below by means of the accompanying drawings and examples. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description are only some embodiments of the present application, and those skilled in the art can also obtain other accompanying drawings according to these accompanying drawings without any creative labor.

[0020] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0021] Figure 2 It is a schematic diagram of the structure of the box shown in the present application;

[0022] Figure 3 It is a schematic diagram of the structure of the placement plate shown in the present application;

[0023] Figure 4 It is a schematic diagram of the internal structure of the box shown in the present application;

[0024] Figure 5 It is a schematic diagram of the structure of the box body shown in the present application;

[0025] Figure 6 It is a schematic diagram of the structure of the cooling assembly shown in the present application.

[0026] The components represented by the reference numerals in the drawings are listed as follows:

[0027] 1, box; 2, cooling assembly; 21, box body; 22, cooling cavity; 23, fan; 24, air outlet pipe; 25, cooling pipe; 26, cooling plate; 3, placing plate; 4, lithium battery body; 5, air outlet hole; 6, movable door; 7, fixed cylinder; 8, fixed rod; 9, spring; 10, pressing plate; 11, positioning bolt; 12, cavity; 13, air outlet; 14, air inlet pipe; 15, dust screen; 16, circulating pump; 17, liquid tank. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned objectives, features and advantages of the present application more apparent and comprehensible, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0029] In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present application, but the present application can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without departing from the concept of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0030] Secondly, the present application is described in detail in combination with the schematic diagram, and in the detailed description of the embodiments of the present application, the cross-sectional view of the device structure will be partially enlarged without the general proportion for the convenience of description, and the schematic diagram is only an example, which should not limit the scope of protection of the present application herein. In addition, the three-dimensional spatial dimensions of length, width and depth should be included in actual manufacture.

[0031] Thirdly, the "one embodiment" or "embodiment" referred to herein means that the specific features, structures or characteristics can be included in at least one implementation of the present application. "In one embodiment" appearing in different places in the specification does not mean the same embodiment, nor is it an embodiment that is independent of or selected from other embodiments.

[0032] Please refer to Figures 1-6 As shown in the drawings, the waterproof lithium battery provided by the embodiment of the present application is provided with a protection assembly on the surface, which comprises a box 1, the bottom of the box 1 is provided with a cooling assembly 2, the inner wall of the box 1 is fixedly connected with a placing plate 3, the top of the placing plate 3 is installed with a lithium battery body 4, the inner wall of the box 1 is provided with a plurality of air outlet holes 5, and a movable door 6 is rotatably arranged on one side of the box 1.

[0033] In this embodiment, the box body 1 is made of high-strength metal or engineering plastic, and the joints are provided with waterproof sealing rings. The contact surface of the movable door 6 and the box body 1 is also provided with a high-performance sealing strip, thereby forming a completely sealed waterproof structure to ensure that external water vapor and dust cannot enter. The cooling assembly 2 is integrally arranged at the bottom of the box body 1, does not occupy additional space, and the placement plate 3 is a structural support inside the box body 1, used for bearing the lithium battery body 4. The lithium battery body 4 generates a large amount of heat during operation and is the object of heat dissipation and protection. The air outlet hole 5 is not connected with the outside, but guides the cooled air to the internal space of the box body 1 to cool the lithium battery body 4.

[0034] Preferably, the cooling assembly 2 includes a box body 21 arranged at the bottom of the box body 1. The box body 21 is internally provided with a cooling cavity 22. The box body 21 is internally and fixedly provided with a fan 23. The fan 23 is communicated with an air outlet pipe 24 at the air outlet end. The air outlet pipe 24 is communicated with the cooling cavity 22 at both ends. The cooling cavity 22 is internally provided with a cooling pipe 25. The cooling cavity 22 is internally provided with a cooling plate 26.

[0035] In this embodiment, the box body 21 constitutes an independent cooling unit. The fan 23 is a power source for forced air flow. The air inlet of the fan 23 is connected with a waterproof air valve. The valve allows air to enter but prevents liquid water from entering, thereby introducing external air without damaging the overall waterproofness of the box body 1. The air outlet pipe 24 is designed to span the two sides of the cooling cavity 22, so that the airflow blown by the fan 23 can enter uniformly from both sides, avoiding uneven heat dissipation caused by direct blowing of the airflow on one side. The cooling pipe 25 is internally circulated with low-temperature cooling liquid, which is the source of active refrigeration. The cooling plate 26 is in close contact with the cooling pipe 25, which is equivalent to a large heat dissipation fin. Its role is to maximize the contact area with air. When air flows over the surface, it can be efficiently cooled to form cold air.

[0036] Preferably, the placement plate 3 is fixedly connected with a fixed cylinder 7 at the top. The fixed cylinder 7 is internally and slidably provided with a fixed rod 8.

[0037] In this embodiment, the fixed cylinder 7 is a guide component that provides an accurate movement path for the entire elastic fixing mechanism, ensuring that the pressing plate 10 can move vertically and stably up and down without deviation.

[0038] Preferably, the fixed rod 8 is fixedly connected with a spring 9 at the bottom. The spring 9 is fixedly connected with a pressing plate 10 at the bottom. The pressing plate 10 is in close contact with the top of the lithium battery body 4.

[0039] In this embodiment, the spring 9 provides a continuous, adjustable elastic pre-tightening force, the pressing plate 10 directly contacts the lithium battery body 4, and the elastic force of the spring 9 is uniformly applied to the lithium battery body 4. This flexible fixing mode can absorb and buffer most of the energy when the device is subjected to vibration or impact, effectively protecting the lithium battery body 4 from damage.

[0040] Preferably, a positioning bolt 11 is screwed in the fixing cylinder 7, and one end of the positioning bolt 11 abuts against one side of the fixing rod 8.

[0041] In this embodiment, after transportation or installation is completed, the positioning bolt 11 can be tightened so that the end thereof tightly abuts against the fixing rod 8. In this way, the original elastic fixing becomes rigid fixing, preventing accidental displacement of the fixing rod 8 under extreme jolting and providing additional safety protection. When maintenance is required, the elastic state can be restored by loosening the positioning bolt 11.

[0042] Preferably, a cavity 12 is formed in the box body 1, the air outlet hole 5 is in communication with the cavity 12, and an air outlet 13 is formed in the top of the box body 21 and is in communication with the cavity 12.

[0043] In this embodiment, the cavity 12 is a main air flow channel designed in the box body 1. The cold air generated by the cooling assembly 2 enters the cavity 12 through the air outlet 13 and is accurately delivered to each heat generating area in the box body 1 through the air outlet holes 5 uniformly distributed on the inner wall of the box body 1, thereby achieving efficient and uniform internal circulation cooling.

[0044] Preferably, one end of the fan 23 is in communication with an air inlet pipe 14, and a dust screen 15 is arranged on the inner wall of the cooling cavity 22 close to the air outlet pipe 24.

[0045] In this embodiment, the air inlet pipe 14 is the entrance of external air, and the dust screen 15 is the key to ensure the long-term stable operation of the system. The dust screen 15 is arranged before the air enters the cooling cavity 22, can effectively filter out dust, willow catkins and other impurities in the air, prevent them from adhering to the cooling plate 26 or internal components, and affect the heat dissipation efficiency and electrical safety.

[0046] Preferably, a circulating pump 16 is arranged in the cooling cavity 22, one end of the circulating pump 16 is in communication with a liquid tank 17 through a pipeline, and the other end of the circulating pump 16 is in communication with one end of a cooling pipe 25. The other end of the cooling pipe 25 is in communication with one side of the liquid tank 17.

[0047] In this embodiment, the circulating pump 16 is a power source that drives the cooling liquid in the liquid tank 17 to flow through the cooling pipe 25. The cooling liquid absorbs heat when flowing, and the temperature rises. When flowing through the cooling pipe 25 in the cooling cavity 22, the heat is taken away by the forced cold air, and the temperature decreases. Finally, the cooling liquid returns to the liquid tank 17, completing a closed and efficient heat dissipation cycle.

[0048] It should be noted that the electrical components have combed the wire harness when active, and will not cause the wire harness to be entangled, and it is worth noting that the working of the fan and the circulating pump disclosed in the above embodiment adopts the method commonly used in the prior art.

[0049] The working principle of the present application is as follows: when working, the circulating pump 16 is started to drive the low-temperature cooling liquid in the liquid tank 17 to circulate in the cooling pipe 25 to absorb the heat generated by the battery system, at the same time, the fan 23 is started to suck air from the outside through the air inlet pipe 14, the air is filtered by the dust screen 15 and then blown into the air outlet pipe 24 and evenly enters the cooling cavity 22, in the cooling cavity 22, the air flows through the surface of the cooling plate 26 cooled by the cooling liquid to perform high-efficiency heat exchange, and the temperature of the air is greatly reduced to form cold air, these cold air then enters the cavity 12 of the box body 1 through the air outlet 13, and finally is evenly blown to the inside of the box body 1 through the air outlet hole 5 to perform high-efficiency cooling on the lithium battery body 4, when installing the lithium battery body 4, it is placed on the placing plate 3, the positioning bolt 11 is loosened, the fixing rod 8 moves downward under the elastic force of the spring 9, and the pressing plate 10 is flexibly pressed on the top of the lithium battery body 4, after adjusting to the appropriate pressure, the positioning bolt 11 is tightened again to lock the fixing rod 8, when the battery system is subjected to external vibration or impact, the spring 9 can absorb most of the energy to buffer the impact force transmitted to the lithium battery body 4, so as to protect the lithium battery body 4 from being damaged, and ensure the stability and reliability of the electrical connection, all the above-mentioned work is completed in the completely sealed box body 1, and the perfect unity of the three performances of high-level waterproofing, high-efficiency heat dissipation and reliable shockproofing is realized.

[0050] It should be understood that during the development of any actual implementation, numerous implementation-specific decisions can be made. Such development efforts might be complex and time-consuming, but would nevertheless be a routine undertaking for those of ordinary skill in the art having the benefit of this disclosure, without undue experimentation.

[0051] It should be noted that the above examples are only used to illustrate the technical solutions of the present application and are not limiting, although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present application, and they should be covered in the scope of the claims of the present application.

Claims

1. A waterproof lithium battery provided with a protection assembly on the surface, characterized in that, Including box (1), the bottom of the box (1) is provided with a cooling assembly (2), the inner wall of the box (1) is fixedly connected with a placing plate (3), the top of the placing plate (3) is installed with a lithium battery body (4), a plurality of air outlets (5) are formed in the inner wall of the box (1), and a movable door (6) is rotatably arranged on one side of the box (1).

2. The waterproof lithium battery with a surface provided with a protection assembly according to claim 1, characterized in that, The cooling assembly (2) comprises a box body (21) arranged at the bottom of the box (1), a cooling cavity (22) is formed in the box body (21), a fan (23) is fixedly installed on the inner bottom of the box body (21), an air outlet pipe (24) is communicated with the air exhaust end of the fan (23), the air outlet pipe (24) is communicated with the two sides of the cooling cavity (22), a cooling pipe (25) is installed in the cooling cavity (22), and a cooling plate (26) is arranged on the inner wall of the cooling cavity (22).

3. The waterproof lithium battery with a surface provided with a protection assembly according to claim 1, characterized in that, The top of the placing plate (3) is fixedly connected with a fixing cylinder (7), and the inner wall of the fixing cylinder (7) is slidably provided with a fixing rod (8).

4. The waterproof lithium battery with a surface provided with a protection assembly according to claim 3, characterized in that, The bottom of the fixing rod (8) is fixedly connected with a spring (9), the bottom of the spring (9) is fixedly connected with a pressing plate (10), and the bottom of the pressing plate (10) is attached to the top of the lithium battery body (4).

5. The waterproof lithium battery with a surface provided with a protection assembly according to claim 3, characterized in that, The fixing cylinder (7) is internally screwed with a positioning bolt (11), one end of the positioning bolt (11) abuts against one side of the fixing rod (8).

6. The waterproof lithium battery with a surface provided with a protection assembly according to claim 2, characterized in that, The box (1) is internally provided with a cavity (12), the air outlet (5) is communicated with the cavity (12), the top of the box (21) is provided with an air outlet (13), and the air outlet (13) is communicated with the cavity (12).

7. The waterproof lithium battery with a surface provided with a protection assembly according to claim 2, characterized in that, One end of the fan (23) is communicated with an air inlet pipe (14), and the inner wall of the cooling cavity (22) close to the air outlet pipe (24) is provided with a dust screen (15).

8. The waterproof lithium battery with a surface provided with a protection assembly according to claim 2, characterized in that, The cooling cavity (22) is internally provided with a circulating pump (16), one end of the circulating pump (16) is communicated with a liquid tank (17) through a pipeline, the other end of the circulating pump (16) is communicated with one end of the cooling pipe (25), and the other end of the cooling pipe (25) is communicated with one side of the liquid tank (17).

Images