Environment-friendly lithium-converted dry battery and preparation method thereof

Abstract

According to the environment-friendly lithium-to-dry battery and the preparation method thereof, through the design of a double-layer heat dissipation structure of a protective shell, the outer heat absorption layer is made of a phase change material, heat is efficiently absorbed in the solid-liquid phase change process of the outer heat absorption layer, the inner heat absorption layer is filled with cooling water, and the dynamic stirring design of rotating blades is combined, so that the environment-friendly lithium-to-dry battery is obtained; meanwhile, through the active response design of releasing the flame-retardant ring, when the temperature of the battery is abnormally increased and thermal runaway occurs, the flame retardant can be quickly released, the flame retardant forms a heat-insulating protective film on the surface of the battery, oxygen supply is effectively isolated, and the service life of the battery is prolonged. And the fire spreading is rapidly inhibited through the chemical inhibition effect, so that the problems of local overheating and non-uniform heat dissipation of the battery are effectively solved, the safety and reliability of the battery under extreme working conditions are also remarkably improved, the service life of the battery is prolonged, and meanwhile, higher guarantee is provided for the application of the battery in a high-heat environment.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium-to-dry batteries, and more specifically, to an environmentally friendly lithium-to-dry battery and a preparation method thereof. Background Art

[0002] As a new type of energy storage device, lithium-to-dry batteries are gradually being used in portable devices, industrial equipment and new energy fields due to their high energy density, long cycle life and excellent electrochemical performance. Compared with traditional lead-acid batteries and nickel-cadmium batteries, lithium-to-dry batteries are more environmentally friendly in terms of material selection and performance: the lithium compounds and other materials used can achieve higher resource utilization and reduce the threat of heavy metal pollution to the environment. At the same time, lithium-to-dry batteries will not produce harmful gas or liquid leakage during use, avoiding further pollution to the ecological environment. In addition, lithium-to-dry batteries have high energy conversion efficiency and stable cycle life. Under the same energy storage requirements, they can reduce the frequency of battery replacement, thereby reducing the impact of discarded batteries on the environment. These characteristics make the application of lithium-to-dry batteries in the field of energy storage more green and environmentally friendly. However, lithium-to-dry batteries are prone to heat accumulation under high-intensity work or complex environments, posing potential safety hazards.

[0003] Although lithium-to-dry batteries have excellent performance in the field of energy storage, they are prone to insufficient heat dissipation under high temperature conditions. Traditional battery structures usually use simple metal shells or single heat dissipation materials for thermal management, which has limited effect when the battery is locally overheated and has low heat dissipation efficiency. In addition, lithium-to-dry batteries may experience thermal runaway under extreme conditions (such as short circuit or overcharge), causing the battery temperature to rise sharply or even catch fire, and existing passive flame retardant materials respond slowly and cannot effectively suppress the spread of fire. Therefore, the existing technology still has a lot of room for improvement in heat dissipation efficiency, safety and thermal runaway response.

[0004] Therefore, in view of the above technical problems, it is necessary to provide an environmentally friendly lithium-to-dry battery and a preparation method thereof. Summary of the invention

[0005] The object of the present invention is to provide an environmentally friendly lithium-to-dry battery and a preparation method thereof to solve the above-mentioned problems.

[0006] In order to achieve the above purpose, the technical solution provided by an embodiment of the present invention is as follows:

[0007] An environmentally friendly lithium-to-dry battery comprises: a lithium-to-dry battery, a protective shell and a release flame retardant ring, wherein a step-down circuit and positive and negative electrodes of the battery are installed on the lithium-to-dry battery, the positive and negative electrodes of the battery are electrically connected to the battery body and are led to the step-down circuit; the step-down circuit is used to adjust the voltage output by the battery body to a safe operating voltage range required by external equipment; the protective shell is installed on the outside of the lithium-to-dry battery, and the bottom end of the protective shell is connected to the negative electrode of the battery; the release flame retardant ring is installed on the protective shell, and the release flame retardant ring is used to quickly reduce the surface temperature of the battery and effectively suppress the spread of fire when abnormal overheating or fire occurs during the operation of the lithium-to-dry battery.

[0008] As a further improvement of the present invention, the protective shell is provided with a heat-absorbing outer layer and a heat-absorbing inner layer, the heat-absorbing outer layer is filled with a heat-absorbing layer, and the heat-absorbing material is set to be a phase change material.

[0009] As a further improvement of the present invention, the heat absorbing inner layer is filled with cooling water, and a plurality of rotating shafts are fixedly connected to the inner wall of the heat absorbing inner layer, and blades are rotatably connected to the outer surface of the rotating shaft, and the corresponding shape of the blades is set to be an arc.

[0010] As a further improvement of the present invention, the plurality of blades are distributed in an array on the inner wall of the heat-absorbing inner layer, and are distributed in a multi-layer structure along the vertical direction. The angles of the blades in each layer are staggered relative to the blades in the upper and lower layers, forming an interlaced layout.

[0011] As a further improvement of the present invention, the release flame retardant ring is installed on the inner wall of the heat absorbing inner layer, and the release flame retardant ring includes multiple release half rings and multiple heat conductive rings, and a heat conductive column is fixedly connected to the heat conductive ring, and one end of the heat conductive column is connected to the heat absorbing inner layer.

[0012] As a further improvement of the present invention, a pair of mutually symmetrical feedback grooves are provided on the heat-conducting ring, and a deformation strip is fixedly connected to the inner wall of the feedback groove, and the material of the deformation strip is set to be a memory alloy material.

[0013] As a further improvement of the present invention, elastic pads are installed at both ends of the release half ring, the elastic pads are connected to the heat conductive ring, and the center of the elastic pads is connected to the deformation strip.

[0014] As a further improvement of the present invention, a plurality of uniformly distributed rigid strips are fixedly connected at the center of the elastic pad and located inside the release semi-ring, and one end of the plurality of rigid strips is uniformly fixedly connected to the inner wall of the release semi-ring.

[0015] As a further improvement of the present invention, a flame retardant is arranged in the release half ring, and the flame retardant is a mixture of a gelling agent and a borate.

[0016] A method for preparing an environmentally friendly lithium-to-dry battery comprises the following steps:

[0017] S1: Electrically connect the positive and negative electrodes of the lithium-to-dry battery to the battery body, and install a step-down circuit to ensure that the battery output voltage is within the safe operating range required by the external device;

[0018] S2: preparing a protective shell, dividing it into a heat-absorbing outer layer and a heat-absorbing inner layer, the heat-absorbing outer layer is provided with a cavity for filling a phase change material, the heat-absorbing inner layer is provided with a cavity for filling cooling water, and a plurality of rotating shafts and arc-shaped blades are installed on the inner wall of the heat-absorbing inner layer, the blades are distributed in an array and are arranged in multiple layers in a vertical direction;

[0019] S3: Filling the phase change material into the cavity of the heat absorbing outer layer, ensuring that the phase change material is evenly distributed to achieve efficient heat absorption, and then sealing the heat absorbing outer layer;

[0020] S4: Inject cooling water into the heat-absorbing inner layer to ensure that the inner cavity is completely filled. At the same time, check whether the rotating shaft and blades are installed normally to ensure that the blades can rotate freely during cooling water convection to enhance the heat dissipation effect;

[0021] S5: Fix the release flame retardant ring to the inner wall of the heat-absorbing inner layer, including installing the release half ring, the heat-conducting ring, the heat-conducting column, the feedback groove, the deformation strip, the elastic pad and the rigid strip, fill the flame retardant into the release half ring, and ensure that all components of the release flame retardant ring are firmly connected, so as to accurately trigger the release of the flame retardant when the battery temperature rises abnormally;

[0022] S6: Install the lithium-to-dry battery into the protective housing so that its negative electrode is electrically connected to the bottom of the protective housing, and ensure that the positive electrode of the lithium-to-dry battery is correctly connected to the output end of the step-down circuit, thereby completing the overall assembly of the battery and the housing;

[0023] S7: The assembled environmentally friendly lithium-to-dry battery is sealed to ensure that there is no leakage in the heat-absorbing outer layer and the heat-absorbing inner layer of the protective shell. The battery is then functionally tested, including heat dissipation performance test, trigger test for releasing the flame retardant ring and battery output voltage stability test. The preparation is completed after confirming that it meets the design requirements.

[0024] Compared with the prior art, the advantages of the present invention are:

[0025] This solution significantly improves the heat dissipation efficiency and safety performance by optimizing the structural design of lithium-to-dry batteries. Through the double-layer heat dissipation structure design of the protective shell, the heat-absorbing outer layer adopts phase change material, and uses its solid-liquid phase change process to efficiently absorb heat. The heat-absorbing inner layer is filled with cooling water, and combined with the dynamic stirring design of the rotating blades, the fluidity and heat dissipation effect of the cooling water are further enhanced, thereby quickly reducing the heat accumulated during the operation of the battery, avoiding performance degradation or thermal runaway caused by high temperature. At the same time, through the active response design of releasing the flame retardant ring, when the battery temperature rises abnormally and thermal runaway occurs, the flame retardant can be quickly released. The flame retardant forms a heat-insulating protective film on the surface of the battery, effectively isolating the oxygen supply, and quickly suppressing the spread of the fire through chemical inhibition, effectively solving the problems of local overheating and uneven heat dissipation of the battery, and significantly improving the safety and reliability of the battery under extreme working conditions, extending the service life of the battery, and providing higher protection for its application in high-temperature environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0027] Figure 2 It is a schematic diagram of the protective housing structure of the present invention;

[0028] Figure 3 It is a schematic diagram of the structure of the heat-absorbing outer layer and the heat-absorbing inner layer of the present invention;

[0029] Figure 4 It is a schematic diagram of the blade structure of the present invention;

[0030] Figure 5 It is a schematic diagram of the structure of the release flame retardant ring of the present invention;

[0031] Figure 6 It is a schematic cross-sectional view of the release half ring and the heat-conducting ring of the present invention.

[0032] Description of the numbers in the figure:

[0033] 1. Lithium-to-dry battery; 2. Protective shell; 3. Release flame retardant ring; 21. Heat-absorbing outer layer; 22. Heat-absorbing inner layer; 23. Rotating shaft; 24. Blade; 31. Release half ring; 32. Heat-conducting ring; 33. Feedback groove; 34. Deformation strip; 35. Elastic pad; 36. Rigid strip; 37. Flame retardant. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0035] Example:

[0036] See also Figure 1-6 , an environmentally friendly lithium-to-dry battery, comprising: a lithium-to-dry battery 1, a protective shell 2 and a release flame retardant ring 3, a step-down circuit and a positive and negative electrode of the battery are installed on the lithium-to-dry battery 1, the positive and negative electrodes of the battery are electrically connected to the battery body, and are led to the step-down circuit; the step-down circuit is used to adjust the voltage output by the battery body to the safe working voltage range required by the external device; the protective shell 2 is installed on the outside of the lithium-to-dry battery 1, and the bottom end of the protective shell 2 is connected to the negative electrode of the battery; the release flame retardant ring 3 is installed on the protective shell 2, and the release flame retardant ring 3 is used to quickly reduce the battery surface temperature and effectively suppress the spread of fire when abnormal overheating or fire occurs during the operation of the lithium-to-dry battery 1.

[0037] Among them, the lithium-to-dry battery 1 is installed in the protective shell 2, and the negative electrode of the battery is electrically connected to the bottom of the protective shell 2. When the battery is used in an external device, the device is connected to the circuit through the positive electrode of the battery and the bottom of the protective shell 2 as the positive and negative electrodes respectively, forming a closed loop, thereby realizing the output of electric energy. At the same time, the step-down circuit inside the battery will automatically adjust the output voltage and control it within the safe working voltage range required by the external device to ensure the stable operation of the equipment.

[0038] By optimizing the structural design of lithium-to-dry batteries, the heat dissipation efficiency and safety performance are significantly improved. Through the double-layer heat dissipation structure design of the protective shell 2, the heat-absorbing outer layer 21 adopts phase change material, and uses its solid-liquid phase change process to efficiently absorb heat. The heat-absorbing inner layer 22 is filled with cooling water, and combined with the dynamic stirring design of the rotating blades 24, the fluidity and heat dissipation effect of the cooling water are further enhanced, thereby quickly reducing the heat accumulated during the operation of the battery, avoiding performance degradation or thermal runaway caused by high temperature. At the same time, through the active response design of releasing the flame retardant ring 3, when the battery temperature abnormally rises and thermal runaway occurs, the flame retardant 37 can be quickly released. The flame retardant forms a heat-insulating protective film on the surface of the battery, effectively isolating the oxygen supply, and quickly suppresses the spread of fire through chemical inhibition, effectively solving the problems of local overheating and uneven heat dissipation of the battery, and significantly improving the safety and reliability of the battery under extreme working conditions, extending the service life of the battery, and providing higher protection for its application in high-temperature environments.

[0039] The protective shell 2 is provided with a heat absorbing outer layer 21 and a heat absorbing inner layer 22 . The heat absorbing outer layer 21 is filled with a heat absorbing layer, and the heat absorbing material is set to be a phase change material.

[0040] Among them, the protective shell 2 is provided with a heat-absorbing outer layer 21 and a heat-absorbing inner layer 22. The heat-absorbing outer layer 21 is filled with a heat-absorbing layer. The material of the heat-absorbing layer is set to be a phase change material. The phase change material is a functional material with excellent heat absorption and storage capabilities. It can absorb or release a large amount of latent heat through a solid-liquid or liquid-solid phase change process within a specific temperature range. The phase change material in the heat-absorbing outer layer 21 absorbs the heat transferred by the heat-absorbing inner layer 22, and forms a synergistic effect with the cooling water in the heat-absorbing inner layer 22, thereby providing efficient heat dissipation protection for the lithium-to-dry battery 1.

[0041] The layered design of the heat-absorbing outer layer 21 and the heat-absorbing inner layer 22 not only optimizes the thermal management capability of the shell, but also makes the outer thickness of the shell relatively larger, thereby enhancing the overall structural strength of the shell and reducing the risk of cooling water leakage or overflow due to the shell being too thin. At the same time, when the lithium-to-dry battery 1 is not working, the phase change material can absorb and store heat in the environment, gradually dissipate excess heat after completing heat storage, and return to a solid state as the temperature drops. This solid-liquid-solid reversible phase change process can not only effectively release the stored heat, but also restore its heat absorption capacity, thereby fully preparing for the high-temperature heat dissipation requirements during the next operation.

[0042] The heat absorbing inner layer 22 is filled with cooling water, and a plurality of rotating shafts 23 are fixedly connected to the inner wall of the heat absorbing inner layer 22. The rotating shafts 23 are rotatably connected with blades 24, and the corresponding shape of the blades 24 is set to be arc-shaped.

[0043] A plurality of blades 24 are distributed in an array on the inner wall of the heat absorbing inner layer 22 , and are distributed in a multi-layer structure along the vertical direction. The angles of the blades in each layer are staggered relative to the blades 24 in the upper and lower layers, forming a staggered layout.

[0044] The release flame retardant ring 3 is installed on the inner wall of the heat absorbing inner layer 22 , and the release flame retardant ring 3 includes a plurality of release half rings 31 and a plurality of heat conducting rings 32 , a heat conducting column is fixedly connected to the heat conducting ring 32 , and one end of the heat conducting column is connected to the heat absorbing inner layer 22 .

[0045] A pair of symmetrical feedback grooves 33 are provided on the heat-conducting ring 32, and a deformation strip 34 is fixedly connected to the inner wall of the feedback groove 33. The material of the deformation strip 34 is set to be a memory alloy material. Elastic pads 35 are installed at both ends of the release half ring 31. The elastic pad 35 is connected to the heat-conducting ring 32, and the center of the elastic pad 35 is connected to the deformation strip 34.

[0046] A plurality of uniformly distributed rigid strips 36 are fixedly connected at the center of the elastic pad 35 and located inside the release semi-ring 31. One end of the plurality of rigid strips 36 is uniformly fixedly connected to the inner wall of the release semi-ring 31. A flame retardant 37 is arranged inside the release semi-ring 31. The flame retardant 37 is a mixture of a gelling agent and a borate.

[0047] Among them, the heat-absorbing inner layer 22 is filled with cooling water, and a plurality of rotating shafts 23 are fixedly connected to the inner wall of the heat-absorbing inner layer 22. Blades 24 are surrounded and rotatably connected to the outside of the rotating shafts 23. The shape of the blades 24 is designed to be arc-shaped. The plurality of blades 24 are distributed in an array on the inner wall structure of the heat-absorbing inner layer 22, and are distributed in a multi-layer structure in the vertical direction. The angles of the blades in each layer are staggered relative to the upper and lower blades to form an interlaced layout.

[0048] By utilizing the natural convection principle caused by the temperature difference of the cooling water in the heat-absorbing inner layer 22, when the lithium-to-dry battery 1 is locally overheated, the heat in the overheated area is quickly conducted through the cooling water in the heat-absorbing inner layer 22, so that the local cooling water temperature rises and rises, while the cooling water with a lower temperature drops, thereby forming a convection cycle. The convection drives the blades 24 on the rotating shaft 23 to rotate, and the stirring action of the blades further enhances the fluidity and mixing efficiency of the cooling water.

[0049] It can quickly diffuse the heat in the local overheating area of ​​the lithium-to-dry battery 1, avoid heat accumulation causing local excessive temperature, and achieve efficient heat dissipation effect. At the same time, the arc design and staggered layout of the blades 24 can maximize the optimization of the flow path of the cooling water, improve the convection efficiency, ensure that the cooling water flows fully in the heat-absorbing inner layer 22, and further improve the thermal management capability of the system.

[0050] The release flame retardant ring 3 is installed on the inner wall of the heat-absorbing inner layer 22. The release flame retardant ring 3 is composed of multiple release half rings 31 and multiple heat-conducting rings 32. A heat-conducting column is fixedly connected to the heat-conducting ring 32. One end of the heat-conducting column is connected to the heat-absorbing inner layer 22, which is used to efficiently transfer the heat in the heat-absorbing inner layer 22 to the heat-conducting ring 32.

[0051] A pair of symmetrical feedback grooves 33 are provided on the heat-conducting ring 32, and the inner wall of the feedback groove 33 is fixedly connected with a deformation strip 34. The deformation strip 34 is made of a memory alloy material and has excellent thermal sensitivity and shape memory function. When the lithium-to-dry battery 1 operates normally, the heat-conducting column transfers heat to the heat-conducting ring 32, but it is not enough to trigger the deformation of the deformation strip 34.

[0052] However, when the temperature of the lithium-to-dry battery 1 abnormally rises to about 150 degrees Celsius, the heat transferred through the heat-conducting column and the heat-conducting ring 32 will cause the deformation bar 34 to reach its critical temperature and deform and shrink. After the deformation bar 34 shrinks, it will pull the elastic pad 35 connected to it. The elastic pad 35 deforms and transfers force to the rigid bar 36. The rigid bar 36 is connected to the outer wall of the release semi-ring 31. When the rigid bar 36 is pulled, it will pull the outer wall of the release semi-ring 31 and cause it to break.

[0053] When the release half ring 31 ruptures, the flame retardant 37 encapsulated therein will be released into the cooling water in the heat-absorbing inner layer 22. The flame retardant 37 is a mixture of a gelling agent and a borate. The released flame retardant 37 is fully mixed with the cooling water and remains distributed in the heat-absorbing inner layer 22. However, it will not work when the lithium-to-dry battery 1 is working normally. Instead, it serves as a preventive safety measure and will only work when the lithium-to-dry battery 1 has an abnormally high temperature or catches fire.

[0054] When the lithium-to-dry battery 1 reaches high temperature or burns, the mixture of cooling water and flame retardant 37 will quickly act on the high-temperature area. First, the cooling water can quickly cool down and quickly take away the heat from the high-temperature area. The gel in the flame retardant 37, due to its high adhesion, will quickly form a layer of heat-insulating protective film on the surface of the lithium-to-dry battery 1. This layer of gel insulation film can effectively isolate the oxygen supply and prevent further diffusion of heat. At the same time, the borate in the flame retardant 37 will release hydrates or form a vitrified layer at high temperatures, which will reduce the heat released during the combustion process through chemical inhibition and inhibit the intensity of the oxidation reaction, thereby quickly controlling the spread of the fire.

[0055] It is worth noting that the effect of the flame retardant 37 is completely dependent on the high temperature trigger condition. When the lithium-to-dry battery 1 is working normally, the cooling water and the flame retardant 37 remain in a static mixed state in the heat-absorbing inner layer 22 and will not interfere with the thermal management process of the battery. Once the battery temperature exceeds the safe range or combustion occurs, the synergistic effect of the cooling water and the flame retardant 37 will be quickly activated to form a multiple protection mechanism. The rapid cooling of the cooling water combined with the heat insulation and flame retardant effects of the flame retardant 37 can not only effectively suppress combustion, but also reduce the temperature of the battery surface, thereby protecting the safety of the lithium-to-dry battery 1 and its surrounding environment.

[0056] Through the dual heat dissipation structure of the heat-absorbing inner layer 22 and the heat-absorbing outer layer 21, and the dynamic stirring effect of the rotating blades 24, the design can efficiently dissipate heat during normal operation to prevent the lithium-to-dry battery 1 from being degraded or damaged due to local overheating. In extreme cases, the release of the flame retardant ring 3 can quickly respond to the high temperature environment and release the flame retardant 37 into the cooling water to form an active flame retardant protection mechanism. It has a multi-level heat dissipation and safety structure design, combining the advantages of passive heat dissipation, efficient convection and active safety protection, which not only significantly improves the operating stability and heat dissipation efficiency of the lithium-to-dry battery 1, but also greatly improves its safety and reliability under extreme working conditions. The overall system structure is scientific and reasonable, with high operating efficiency, which can effectively extend the service life of the lithium-to-dry battery 1, and at the same time provides safety guarantees for its application in high-temperature environments.

[0057] It should be noted that the material of the release half ring 31 needs to have a certain degree of brittleness and stability to meet the design requirements. When the rigid bar 36 is pulled by the deformation bar 34 and the elastic pad 35, the release half ring 31 needs to be able to break under the action of external force, thereby releasing the flame retardant 37 encapsulated therein. The area where the release half ring 31 contacts the rigid bar 36 is set as a borosilicate glass ring.

[0058] The borosilicate glass ring is only used at the key position of the release half ring 31 to ensure that it can break along the preset weak point under the tensile force applied by the rigid strip 36. The borosilicate glass will quickly break along the weak point when subjected to external force, which meets the requirement of accurate triggering of the release half ring 31. At the same time, the glass material has excellent chemical corrosion resistance and can be in contact with cooling water and flame retardant 37 for a long time without degradation or chemical reaction. In addition, borosilicate glass shows long-term stability in high temperature and coolant environment, and will not release harmful substances, ensuring no negative impact on the safety of the lithium-to-dry battery 1 and the surrounding environment.

[0059] A method for preparing an environmentally friendly lithium-to-dry battery comprises the following steps:

[0060] S1: electrically connect the positive and negative electrodes of the lithium-to-dry battery 1 to the battery body, and install a step-down circuit to ensure that the battery output voltage is within the safe operating range required by the external device;

[0061] S2: preparing a protective shell 2, dividing it into a heat-absorbing outer layer 21 and a heat-absorbing inner layer 22, the heat-absorbing outer layer 21 is provided with a cavity for filling a phase change material, the heat-absorbing inner layer 22 is provided with a cavity for filling cooling water, and a plurality of rotating shafts 23 and arc-shaped blades 24 are installed on the inner wall of the heat-absorbing inner layer 22, the blades are distributed in an array and are arranged in multiple layers in a vertical direction;

[0062] S3: Filling the phase change material into the cavity of the heat absorbing outer layer 21, ensuring that the phase change material is evenly distributed to achieve efficient heat absorption, and then sealing the heat absorbing outer layer 21;

[0063] S4: Inject cooling water into the heat-absorbing inner layer 22 to ensure that the inner cavity is completely filled, and at the same time check whether the rotating shaft 23 and the blades 24 are installed normally to ensure that the blades can rotate freely during the convection of cooling water to enhance the heat dissipation effect;

[0064] S5: Fix the release flame retardant ring 3 to the inner wall of the heat absorbing inner layer 22, including installing the release half ring 31, the heat conductive ring 32, the heat conductive column, the feedback groove 33, the deformation strip 34, the elastic pad 35 and the rigid strip 36, filling the flame retardant 37 into the release half ring 31, and ensuring that all components of the release flame retardant ring 3 are firmly connected, so as to accurately trigger the release of the flame retardant when the battery temperature rises abnormally;

[0065] S6: Install the lithium-to-dry battery 1 into the protective housing 2, so that its negative electrode is electrically connected to the bottom of the protective housing 2, and ensure that the positive electrode of the lithium-to-dry battery 1 is correctly connected to the output end of the step-down circuit, completing the overall assembly of the battery and the housing;

[0066] S7: The assembled environmentally friendly lithium-to-dry battery is sealed to ensure that there is no leakage in the heat-absorbing outer layer 21 and the heat-absorbing inner layer 22 of the protective shell 2. The battery is then functionally tested, including heat dissipation performance test, trigger test for releasing the flame-retardant ring 3 and battery output voltage stability test. The preparation is completed after confirming that it meets the design requirements.

[0067] Working principle:

[0068] The lithium-to-dry battery 1 adjusts the output voltage to the safe operating range required by the external device through the step-down circuit to ensure the stable operation of the device; the protective shell 2 adopts a double-layer heat dissipation structure, in which the heat-absorbing outer layer 21 is filled with phase change material, which efficiently absorbs the heat generated by the lithium-to-dry battery 1 during operation through solid-liquid phase change, and the heat-absorbing inner layer 22 is filled with cooling water, and a rotating shaft 23 and arc-shaped blades 24 are fixed on the inner wall. The blades 24 dynamically stir the cooling water through natural convection, further enhancing the fluidity and heat dissipation effect of the cooling water, and quickly reducing the heat accumulation during battery operation; when the temperature rises abnormally or thermal runaway occurs, the flame retardant ring 3 is released to respond actively, and the heat is transferred through the heat-conducting column and the heat-conducting ring 32 To the feedback groove 33, the deformation strip 34 made of memory alloy is triggered to deform, driving the elastic pad 35 and the rigid strip 36 to rupture and release the half ring 31, thereby releasing the flame retardant 37; when the lithium-to-dry battery 1 overheats and runs away, the gelling agent in the flame retardant 37 forms a heat-insulating protective film on the surface of the lithium-to-dry battery 1 to isolate the oxygen supply. At the same time, the borate reduces the combustion intensity through chemical inhibition, effectively suppressing the spread of fire. Through the synergistic effect of the heat-absorbing outer layer 21, the heat-absorbing inner layer 22 and the release of the flame retardant ring 3, not only the efficient heat dissipation of the lithium-to-dry battery 1 is guaranteed, but also the safety and reliability are significantly improved under extreme working conditions, the battery life is extended, and multiple protections are provided for its application in high-temperature environments.

[0069] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0070] In addition, it should be understood that although the present specification is described according to embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that those skilled in the art can understand.

Claims

1. An environmentally friendly lithium-to-dry battery, characterized in that: include: A lithium-to-dry battery (1), wherein a step-down circuit and positive and negative electrodes of the battery are installed on the lithium-to-dry battery (1), wherein the positive and negative electrodes of the battery are electrically connected to the battery body and are led to the step-down circuit; the step-down circuit is used to adjust the voltage output by the battery body to a safe operating voltage range required by an external device; A protective shell (2), the protective shell (2) being mounted on the outside of the lithium-to-dry battery (1), the bottom end of the protective shell (2) being connected to the negative electrode of the battery; A flame retardant release ring (3) is installed on the protective shell (2) and is used to quickly reduce the battery surface temperature and effectively suppress the spread of fire when abnormal overheating or fire occurs during the operation of the lithium-to-dry battery (1).

2. The environmentally friendly lithium-to-dry battery according to claim 1, characterized in that: The protective shell (2) is provided with a heat-absorbing outer layer (21) and a heat-absorbing inner layer (22); the heat-absorbing outer layer (21) is filled with a heat-absorbing layer; and the heat-absorbing material is set to be a phase-change material.

3. The environmentally friendly lithium-to-dry battery according to claim 2, characterized in that: The heat absorbing inner layer (22) is filled with cooling water, and a plurality of rotating shafts (23) are fixedly connected to the inner wall of the heat absorbing inner layer (22), and blades (24) are rotatably connected to the outer surface of the rotating shaft (23), and the corresponding shape of the blades (24) is set to be an arc.

4. The environmentally friendly lithium-to-dry battery according to claim 3, characterized in that: The plurality of blades (24) are distributed in an array on the inner wall of the heat-absorbing inner layer (22) and are distributed in a multi-layer structure in the vertical direction. The angles of the blades in each layer are staggered relative to the upper and lower layer blades (24), forming a staggered layout.

5. The environmentally friendly lithium-to-dry battery according to claim 2, characterized in that: The release flame retardant ring (3) is installed on the inner wall of the heat absorbing inner layer (22), and the release flame retardant ring (3) comprises a plurality of release half rings (31) and a plurality of heat conducting rings (32), a heat conducting column is fixedly connected to the heat conducting ring (32), and one end of the heat conducting column is connected to the heat absorbing inner layer (22).

6. The environmentally friendly lithium-to-dry battery according to claim 5, characterized in that: The heat-conducting ring (32) is provided with a pair of mutually symmetrical feedback grooves (33), the inner walls of the feedback grooves (33) are fixedly connected with deformation strips (34), and the material of the deformation strips (34) is set to be a memory alloy material.

7. The environmentally friendly lithium-to-dry battery according to claim 6, characterized in that: Elastic pads (35) are installed at both ends of the release half ring (31), the elastic pad (35) is connected to the heat-conducting ring (32), and the center of the elastic pad (35) is connected to the deformation strip (34).

8. The environmentally friendly lithium-to-dry battery according to claim 7, characterized in that: A plurality of uniformly distributed rigid strips (36) are fixedly connected at the center of the elastic pad (35) and located inside the release semi-ring (31), and one end of the plurality of rigid strips (36) is uniformly fixedly connected to the inner wall of the release semi-ring (31).

9. The environmentally friendly lithium-to-dry battery according to claim 8, characterized in that: A flame retardant (37) is arranged in the release half ring (31), and the flame retardant (37) is a mixture of a gelling agent and a borate.

10. A method for preparing an environmentally friendly lithium-to-dry battery according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1: electrically connect the positive and negative electrodes of the lithium-to-dry battery (1) to the battery body, and install a step-down circuit to ensure that the battery output voltage is within the safe operating range required by the external device; S2: preparing a protective shell (2), dividing it into a heat-absorbing outer layer (21) and a heat-absorbing inner layer (22), wherein the heat-absorbing outer layer (21) is provided with a cavity for filling a phase change material, and the heat-absorbing inner layer (22) is provided with a cavity for filling cooling water, and a plurality of rotating shafts (23) and arc-shaped blades (24) are installed on the inner wall of the heat-absorbing inner layer (22), wherein the blades are distributed in an array and are arranged in multiple layers in a staggered manner in a vertical direction; S3: Filling the phase change material into the cavity of the heat absorbing outer layer (21), ensuring that the phase change material is evenly distributed to achieve a high-efficiency heat absorption effect, and then sealing the heat absorbing outer layer (21); S4: Inject cooling water into the heat-absorbing inner layer (22) to ensure that the inner cavity is completely filled, and at the same time check whether the rotating shaft (23) and the blades (24) are installed normally to ensure that the blades can rotate freely during cooling water convection to enhance the heat dissipation effect; S5: Fixing the release flame retardant ring (3) to the inner wall of the heat absorbing inner layer (22), including installing the release half ring (31), the heat conductive ring (32), the heat conductive column, the feedback groove (33), the deformation strip (34), the elastic pad (35) and the rigid strip (36), filling the flame retardant (37) into the release half ring (31), and ensuring that all components of the release flame retardant ring (3) are firmly connected, so as to accurately trigger the release of the flame retardant when the battery temperature rises abnormally; S6: Install the lithium-to-dry battery (1) into the protective housing (2) so that its negative electrode is electrically connected to the bottom of the protective housing (2), and ensure that the positive electrode of the lithium-to-dry battery (1) is correctly connected to the output end of the step-down circuit, thereby completing the overall assembly of the battery and the housing; S7: The assembled environmentally friendly lithium-to-dry battery is sealed to ensure that there is no leakage in the heat-absorbing outer layer (21) and the heat-absorbing inner layer (22) of the protective shell (2). The battery is then functionally tested, including a heat dissipation performance test, a trigger test for releasing the flame retardant ring (3), and a battery output voltage stability test. The preparation is completed after confirming that it meets the design requirements.

Images