High-temperature-resistant battery module used in extreme environment

Abstract

The invention provides a high-temperature-resistant battery module used in an extreme environment, and relates to the technical field of batteries, the high-temperature-resistant battery module comprises a thermal insulation battery box and a battery main body, a refrigeration cavity is formed in the thermal insulation battery box, a plurality of mounting brackets are mounted in the refrigeration cavity, and the mounting brackets are used for fixedly mounting the battery main body; the refrigeration cavity is filled with argon; a refrigeration mechanism is mounted on the thermal insulation battery box and is used for cooling argon; the installation support comprises an installation box, and an installation groove is formed in the installation box. According to the high-temperature-resistant battery module used in the extreme environment provided by the invention, through the arrangement of the heat insulation battery box, the battery main body, the mounting bracket, argon, the refrigeration mechanism, the mounting box, the sealing door plate and the unsealing mechanism, the battery main body can be isolated from external air, the oxidization of a battery is reduced, the spontaneous combustion condition during abnormal heating is reduced, and the service life of the battery is prolonged. The heat dissipation of the battery can be ensured in a high-temperature environment, and meanwhile, the battery can be protected.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and particularly to a high-temperature resistant battery module for extreme environments. Background Art

[0002] With the continuous progress of technology, the application requirements of various electronic devices, transportation tools, and industrial systems in extreme environments are increasing day by day, such as high-temperature industrial production environments, outdoor equipment in desert areas, aerospace, and deep-sea exploration. In these extreme environments, as a key energy supply component, the performance and reliability of the battery module face severe challenges, and the impact of high-temperature environments on the battery module is particularly prominent. Traditional battery modules are usually based on conventional designs and material selections, mainly suitable for normal temperature or relatively mild environmental conditions. In high-temperature environments, ordinary battery modules have many insurmountable problems. First, from the perspective of battery materials, the chemical activity of the electrode materials and electrolytes of the battery significantly increases at high temperatures, which will accelerate the corrosion of the electrodes and the decomposition of the electrolytes. Taking the common lithium-ion battery module as an example, high temperature will cause changes in the lattice structure of the positive electrode material, resulting in a rapid decline in capacity; at the same time, the decomposition of the electrolyte will generate gas, causing the internal pressure of the battery to rise, which not only affects the charge and discharge performance of the battery but also poses a safety hazard, and may even cause the battery to catch fire or explode in severe cases. Second, in terms of heat dissipation, the heat dissipation design of ordinary battery modules is difficult to meet the heat dissipation requirements in extreme high-temperature environments. In high-temperature environments, the heat generated by the battery itself and the heat transmitted from the outside accumulate in large quantities, and ordinary heat dissipation structures such as simple heat sinks or natural convection heat dissipation methods have extremely low heat dissipation efficiency and cannot effectively dissipate the heat in time, resulting in a continuous increase in the temperature of the battery module and further exacerbating the deterioration of battery performance. Summary of the Invention

[0003] Based on the technical problems existing in the background art, the present invention proposes a high-temperature resistant battery module for extreme environments.

[0004] A high-temperature resistant battery module for extreme environments proposed by the present invention includes a heat-insulating battery box and a battery body. A refrigeration cavity is provided in the heat-insulating battery box, and a plurality of mounting brackets are installed in the refrigeration cavity. The mounting brackets are used to fixedly install the battery body; The refrigeration cavity is filled with argon; A refrigeration mechanism is installed on the heat-insulating battery box, and the refrigeration mechanism is used to cool the argon; The installation bracket includes an installation box, an installation groove is formed in the installation box, an installation opening communicating with the installation groove is formed in the heat insulation battery box, the battery body is detachably installed in the installation groove, a heat insulation sealing door plate for blocking the installation opening is detachably installed on the heat insulation battery box, and communication openings communicating the installation groove with the refrigeration cavity are formed at both ends of the installation box; A sealing and unsealing mechanism is installed on the installation box, and the sealing and unsealing mechanism can block the communication opening.

[0005] Preferably, the sealing and unsealing mechanism includes a first sealing plate, a second sealing plate and a driving component; the first sealing plate and the second sealing plate can block the communication openings on both sides of the installation box; The driving component is used to drive the first sealing plate and the second sealing plate to open and close the communication openings on both sides of the installation box.

[0006] Preferably, the driving component includes a driving shaft rod, a gear and a motor; two fixed side plates are installed in the installation box, there is a gap between the fixed side plates and the inner walls on both sides of the installation box, and the first sealing plate and the second sealing plate are both slidably installed in this gap; A sealing strip is installed between the fixed side plate and the inner wall of the installation box, and a movable opening slidably matched with the second sealing plate is formed through the sealing strip; The driving shaft rod is rotatably installed in this gap, the gear is sleeved on the driving shaft rod, and the gear meshes with the first sealing plate and the second sealing plate respectively; The motor is installed on the installation box, and the output shaft of the motor is connected to one end of the driving shaft rod.

[0007] Preferably, the refrigeration mechanism includes a refrigerator, a heat conducting sheet and a circulation fan; the refrigerator is installed in the refrigeration cavity, the heat conducting sheet is installed on the refrigerator and is located in the refrigeration cavity, and the circulation fan is installed in the refrigeration cavity and is located at the top of the refrigeration cavity.

[0008] Preferably, a base box is installed at the bottom of the heat insulation battery box, and an air supplement mechanism and a filtering mechanism are installed in the base box; The air supplement mechanism is used to supplement argon into the refrigeration cavity; The filtering mechanism is used to filter oxygen in the refrigeration cavity.

[0009] Preferably, the air supplement mechanism includes a piston cylinder and a piston plate; the piston cylinder is installed in the base box, the opening of the piston cylinder communicates with the refrigeration cavity, and the piston plate is slidably installed in the piston cylinder.

[0010] Preferably, the filtering mechanism includes an air pump, a polymer membrane filter, and an oxygen adsorber; the intake end of the air pump is communicated with the refrigeration cavity, the air pump is communicated with the outlet end of the oxygen adsorber, the intake end of the polymer membrane filter is communicated with the outlet end of the air pump, and the outlet end of the polymer membrane filter is communicated with the refrigeration cavity.

[0011] Preferably, a ventilation channel is formed through the base box, and a cooling fan is installed in the ventilation channel.

[0012] Preferably, the mounting bracket further includes a plurality of strip-shaped limiting mounting brackets; the plurality of strip-shaped limiting mounting brackets are respectively installed on the upper and lower inner walls of the mounting box, and strip-shaped mounting grooves adapted to the strip-shaped limiting mounting brackets are formed on the battery body.

[0013] The high-temperature resistant battery module for extreme environments proposed by the present invention has the following beneficial effects: by providing the heat-insulating battery box, the battery body, the mounting bracket, argon, the refrigeration mechanism, the mounting box, the sealing door panel, and the unsealing mechanism, the battery body can be isolated from the outside air, reducing the oxidation of the battery and reducing the occurrence of spontaneous combustion when abnormal heating occurs. It can ensure the heat dissipation of the battery in a high-temperature environment and can also protect the battery. Description of the Drawings

[0014] Figure 1 is a schematic diagram of the overall structure of a high-temperature resistant battery module for extreme environments proposed by the present invention; Figure 2 is a front sectional view of the heat-insulating battery box in a high-temperature resistant battery module for extreme environments proposed by the present invention; Figure 3 is a top sectional view of the heat-insulating battery box of a high-temperature resistant battery module for extreme environments proposed by the present invention; Figure 4 is a high-temperature resistant battery module for extreme environments proposed by the present invention Figure 2 enlarged view at A; Figure 5 is a sectional view of the base box in a high-temperature resistant battery module for extreme environments proposed by the present invention; Figure 6 is a schematic diagram of the structure of the battery body in a high-temperature resistant battery module for extreme environments proposed by the present invention; Figure 7 is a sectional view of the mounting box in a high-temperature resistant battery module for extreme environments proposed by the present invention.

[0015] In the figure: 1, heat-insulating battery box; 2, battery body; 3, refrigeration chamber; 4, installation box; 5, heat-insulating and sealing door panel; 6, first sealing plate; 7, second sealing plate; 8, drive shaft rod; 9, gear; 10, motor; 11, fixed side plate; 12, sealing strip; 13, refrigerator; 14, heat-conducting sheet; 15, circulation fan; 16, base box; 17, piston cylinder; 18, piston plate; 19, air pump; 20, polymer membrane filter; 21, heat dissipation fan; 22, strip-shaped limit installation rack; 23, strip-shaped installation groove; 24, oxygen adsorber. Detailed implementation manner

[0016] Refer to Figures 1-7, the present invention provides a high-temperature resistant battery module for extreme environments, including a heat-insulating battery box 1 and a battery body 2. A refrigeration chamber 3 is provided inside the heat-insulating battery box 1. A plurality of mounting brackets are installed in the refrigeration chamber 3. The mounting brackets are installed in the refrigeration chamber 3 through fixing rods. The outer wall of the refrigeration chamber 3 is installed with heat-insulating materials (such as aluminum silicate fiber, phenolic foam sandwich panel, etc.), which can reduce the heat exchange between the inside and outside of the refrigeration chamber 3. The mounting brackets are used to fixedly install the battery body 2. The refrigeration chamber 3 is filled with argon. Under normal temperature and pressure (25°C, 1 standard atmosphere), the thermal conductivity of argon is about 0.0172 W / (m·K). A refrigeration mechanism is installed on the heat-insulating battery box 1. The refrigeration mechanism is used to cool the argon gas. The argon gas is cooled by the refrigeration mechanism, and then the cooled argon gas flows in the refrigeration chamber 3 to cool the battery body 2, enabling it to be used in an extremely high-temperature environment. In addition, argon is an inert gas. When the battery overheats, it can reduce the contact between the battery and oxygen, reducing the occurrence of battery spontaneous combustion. Argon is an inert gas with stable chemical properties, which can effectively isolate the battery from external oxygen, prevent the chemical substances inside the battery from reacting with oxygen, reduce battery self-discharge, avoid battery capacity attenuation and performance deterioration caused by oxidation, and extend the service life and storage period of the battery. Argon can form a relatively stable gas environment around the battery, hindering the propagation of thermal radiation to a certain extent, reducing the impact of the external high-temperature environment on the battery through thermal radiation, and helping to maintain the stability of the battery operating temperature. The gas layer formed by argon can play a certain buffering role for the battery, reducing physical damage to the battery caused by external vibrations, impacts, etc., and improving the reliability and stability of the battery in a harsh environment. The mounting bracket includes a mounting box 4. An installation groove is provided in the mounting box 4. An installation opening communicating with the installation groove is provided on the heat-insulating battery box 1. The battery body 2 is detachably installed in the installation groove. A heat-insulating sealing door panel 5 for blocking the installation opening is detachably installed on the heat-insulating battery box 1. Communication openings communicating the installation groove with the refrigeration chamber 3 are provided at both ends of the mounting box 4. There is a gap between the periphery of the mounting box 4 (except for the front position) and the inner wall of the refrigeration chamber 3, which can facilitate the flow of argon gas to take away the heat from the battery body 2. In addition, when the heat-insulating battery box 1 is impacted by an external force, even if the heat-insulating battery box 1 is deformed, the damage to the internal battery body 2 is extremely limited, which can protect the battery body 2. In actual situations, after the battery body 2 is used for a long time, the battery body 2 may malfunction, and then the battery body 2 needs to be replaced. When replacing the battery body 2, the battery body 2 needs to be removed from the installation groove. In order to reduce the leakage of argon gas, the communication openings on both sides of the mounting box 4 need to be blocked to reduce the leakage of argon gas. A sealing and unsealing mechanism is installed on the mounting box 4. The sealing and unsealing mechanism can block the communication openings. When replacing the faulty battery body 2, the communication openings need to be blocked by the sealing and unsealing mechanism first, so that the installation groove and the refrigeration chamber 3 are in a relatively isolated state, and the argon gas in the refrigeration chamber 3 will not be discharged through the communication openings. After the battery body 2 is replaced, the communication openings are opened through the sealing and unsealing mechanism, and the cold argon gas that can flow through the surface of the battery body 2, thereby achieving the cooling effect on the battery body 2, reducing the influence of the external environmental high temperature, and at the same time, the heat-insulating sealing door panel 5 needs to be used to block the installation opening so that the installation groove and the outside are in a relatively closed state.

[0017] In addition, battery temperature monitoring is also set up, using sensors and cameras to monitor the temperature change of the battery body 2, so that the staff can process the battery module in time.

[0018] As Figure 2 , Figure 3 , Figure 4 and Figure 7 As shown in , the unsealing mechanism includes a first sealing plate 6, a second sealing plate 7 and a driving component; the first sealing plate 6 and the second sealing plate 7 can block the communication ports on both sides of the installation box 4, and the driving component is used to drive the first sealing plate 6 and the second sealing plate 7 to open and close the communication ports on both sides of the installation box 4. By opening or closing the communication ports through the first sealing plate 6 and the second sealing plate 7, it is convenient for the staff to disassemble, install and replace the battery body 2, and its structure is simple and the operation is convenient.

[0019] As Figure 2 , Figure 3 , Figure 4 and Figure 7 As shown in , the driving component includes a driving shaft rod 8, a gear 9 and a motor 10; two fixed side plates 11 are installed in the installation box 4, and the projection of the fixed side plates 11 on the inner wall of the side of the installation box 4 is located in the middle of the communication port. The first sealing plate 6 is slidably installed on the fixed side plates 11, and there is a gap between the fixed side plates 11 and the inner walls on both sides of the installation box 4. The first sealing plate 6 and the second sealing plate 7 are both slidably installed in this gap. A sealing strip 12 is installed between the fixed side plates 11 and the inner wall of the installation box 4, and a movable port slidably matched with the second sealing plate 7 is penetrated through the sealing strip 12 to ensure that the second sealing plate 7 and the fixed side plates 11 are also in a relatively sealed state, reducing the discharge of argon gas from the gap between the first sealing plate 6 and the second sealing plate 7. The second sealing plate 7 is slidably installed on the inner wall of the side of the installation groove. The driving shaft rod 8 is rotatably installed in this gap. The gear 9 is sleeved on the driving shaft rod 8, and the gear 9 meshes with the first sealing plate 6 and the second sealing plate 7 respectively. The motor 10 is installed on the installation box 4, and the output shaft of the motor 10 is connected to one end of the driving shaft rod 8. During specific operation, the motor 10 works to drive the driving shaft rod 8 and the gear 9 to rotate, and the gear 9 drives the first sealing plate 6 and the second sealing plate 7 to move away from each other to open (block the communication port) or move towards each other to overlap (open the upper and lower ends of the communication port). The operation is simple and convenient, and can reduce the leakage of argon gas.

[0020] As Figure 2 and Figure 5As shown in the figure, the refrigeration mechanism includes a refrigerator 13, a heat conducting fin 14 and a circulation fan 15; the refrigerator 13 is installed in the refrigeration chamber 3, the heat conducting fin 14 is installed on the refrigerator 13, and the heat conducting fin 14 is located in the refrigeration chamber 3. The circulation fan 15 is installed in the refrigeration chamber 3 and is located at the top of the refrigeration chamber 3, which can pump the cold argon gas at the bottom to the top of the refrigeration chamber 3, so that the cold argon gas is distributed throughout the refrigeration chamber 3. The refrigerator 13 can be the refrigeration end of the magnetic refrigeration device. The refrigerator 13 is a prior art and the specific structure is not shown in the figure. The heat conducting fin 14 transfers the temperature at the refrigeration end of the magnetic refrigeration device to the refrigeration chamber 3 to cool the argon gas, and then the circulation fan 15 blows the argon gas to form a circulating flow in the refrigeration chamber 3 to dissipate heat from the battery body 2 in the refrigeration chamber 3.

[0021] In actual situations, when replacing the faulty battery body 2, a small amount of argon gas will leak out of the installation slot, and at the same time, a small amount of air will mix into the argon gas from the installation slot. Long-term accumulation may cause the air concentration in the refrigeration chamber 3 to gradually increase, which may affect the heat insulation and refrigeration effects. When the oxygen concentration is too high and the temperature of the battery body 2 is abnormally high, it may also cause the battery to catch fire. When the oxygen concentration is too high, it may also cause oxidation inside the battery, etc., reducing the service life of the battery body 2. Therefore, there is the following design.

[0022] As Figure 1 , Figure 2 and Figure 5 As shown in the figure, a base box 16 is installed at the bottom of the heat insulation battery box 1. A gas replenishing mechanism and a filtering mechanism are installed in the base box 16. The gas replenishing mechanism is used to replenish argon gas to the refrigeration chamber 3. After replacing the faulty battery body 2, argon gas is replenished into the refrigeration chamber 3 through the gas replenishing mechanism. The filtering mechanism is used to filter the oxygen in the refrigeration chamber 3. At the same time, the oxygen in the refrigeration chamber 3 is filtered out through the filtering mechanism to reduce the contact between the battery body 2 and oxygen and filter out the oxygen.

[0023] As Figure 2 and Figure 5 As shown in the figure, the gas replenishing mechanism includes a piston cylinder 17 and a piston plate 18; the piston cylinder 17 is installed in the base box 16, the opening of the piston cylinder 17 is communicated with the refrigeration chamber 3, and a one-way valve is installed at the opening of the piston cylinder 17 to ensure that argon gas can only go out and not in, ensuring the purity of the argon gas in the piston cylinder 17. The piston plate 18 is slidably installed in the piston cylinder 17. The piston plate 18 slides in the piston cylinder 17 and can squeeze out the argon gas in the piston cylinder 17. In addition, the piston plate 18 is driven by an electric push rod (not shown in the figure).

[0024] As Figure 2 and Figure 5As shown in the figure, the filtering mechanism includes an air pump 19, a polymer membrane filter 20 and an oxygen adsorber 24; the intake end of the air pump 19 is communicated with the inside of the refrigeration chamber 3, the air pump 19 is communicated with the outlet end of the oxygen adsorber 24, the intake end of the polymer membrane filter 20 is communicated with the outlet end of the air pump 19, and the outlet end of the polymer membrane filter 20 is communicated with the refrigeration chamber 3. The air pump 19 works to pump the gas in the refrigeration chamber 3 into the polymer membrane filter 20. After being filtered by the polymer membrane filter 20 (the working principle is: based on the different permeation rates of different gases in the polymer membrane, the permeation rate of oxygen in the membrane is faster than that of argon. When the mixed gas passes through the membrane, oxygen preferentially permeates through the membrane, and oxygen-enriched gas is obtained on the other side of the membrane, while the gas that does not permeate through the membrane is rich in argon), the filtered oxygen passes through the oxygen adsorber 24, and the oxygen is adsorbed. The remaining gas then re-enters the refrigeration chamber 3 to reduce the oxygen concentration in the refrigeration chamber 3. The materials for absorbing oxygen are aluminosilicate crystals (molecular sieves) with a uniform microporous structure, metal-organic framework materials (MOFs), graphene oxide and its derivatives, etc., similar to the structure of an air filter element.

[0025] As Figure 1 , Figure 2 and Figure 5 As shown in the figure, a ventilation channel is penetrated through the base box 16, and a cooling fan 21 is installed in the ventilation channel. The cooling fan 21 works to make the air in the working environment flow, reduce the heat accumulation on the heat insulation battery box 1, and make the ambient temperature of the entire battery module relatively uniform.

[0026] As Figure 2 , Figure 3 , Figure 6 and Figure 7 As shown in the figure, the mounting bracket further includes a plurality of strip-shaped limit mounting brackets 22; the plurality of strip-shaped limit mounting brackets 22 are respectively installed on the upper and lower inner walls of the mounting box 4, and strip-shaped mounting grooves 23 adapted to the strip-shaped limit mounting brackets 22 are provided on the battery body 2. The position of the battery body 2 is restricted by the strip-shaped limit mounting brackets 22 to ensure the mounting position of the battery body 2. In addition, an overhead state appears between the upper and lower sides of the battery body 2 and the inner wall of the mounting groove, which is convenient for cold argon gas to pass through to take away the heat generated on the battery body 2 and at the same time plays a protective role for the battery body 2.

[0027] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A high temperature resistant battery module for use in extreme environments, characterized in that: It comprises a heat-insulating battery box (1) and a battery body (2), wherein a refrigeration chamber (3) is provided in the heat-insulating battery box (1), and a plurality of mounting brackets are installed in the refrigeration chamber (3), wherein the mounting brackets are used to fix the battery body (2); The refrigeration chamber (3) is filled with argon gas; The heat-insulating battery box (1) is provided with a refrigeration mechanism, and the refrigeration mechanism is used for cooling the argon gas; The mounting bracket comprises a mounting box (4), a mounting slot is provided in the mounting box (4), a mounting opening communicating with the mounting slot is provided on the heat-insulating battery box (1), the battery body (2) is detachably mounted in the mounting slot, a heat-insulating sealing door panel (5) for sealing the mounting opening is detachably mounted on the heat-insulating battery box (1), and both ends of the mounting box (4) are provided with communication openings communicating with the mounting slot and the refrigeration chamber (3); The installation box (4) is provided with an unsealing mechanism, and the unsealing mechanism is capable of sealing the communication port.

2. A high temperature resistant battery module for use in extreme environments according to claim 1, characterized in that: The unsealing mechanism comprises a No. 1 sealing plate (6), a No. 2 sealing plate (7) and a driving assembly; the No. 1 sealing plate (6) and the No. 2 sealing plate (7) are capable of blocking the communication openings on both sides of the installation box (4); The driving assembly is used to drive the connecting openings on both sides of the No. 1 sealing plate (6) and the No. 2 sealing plate (7) switch installation box (4).

3. A high temperature resistant battery module for use in extreme environments according to claim 2, characterized in that: The driving assembly comprises a driving shaft (8), a gear (9) and a motor (10); two fixed side plates (11) are installed in the installation box (4), and there is a gap between the fixed side plates (11) and the inner walls on both sides of the installation box (4), and the first sealing plate (6) and the second sealing plate (7) are both slidably installed in the gap; A sealing strip (12) is installed between the fixed side plate (11) and the inner wall of the installation box (4), and a movable opening is provided through the sealing strip (12) for slidingly cooperating with the second sealing plate (7); The driving shaft (8) is rotatably mounted in the gap, the gear (9) is sleeved on the driving shaft (8), and the gear (9) is respectively meshed with the first sealing plate (6) and the second sealing plate (7); The motor (10) is mounted on the mounting box (4), and the output shaft of the motor (10) is connected to one end of the driving shaft (8).

4. The high temperature resistant battery module for use in extreme environments according to claim 1, characterized in that: The refrigeration mechanism comprises a refrigerator (13), a heat conducting sheet (14) and a circulation fan (15); the refrigerator (13) is installed in a refrigeration cavity (3), the heat conducting sheet (14) is installed on the refrigerator (13), and the heat conducting sheet (14) is located in the refrigeration cavity (3); the circulation fan (15) is installed in the refrigeration cavity (3), and the circulation fan (15) is located at the top of the refrigeration cavity (3).

5. The high temperature resistant battery module for use in extreme environments according to claim 1, characterized in that: A base box (16) is installed at the bottom of the heat-insulating battery box (1), and an air supply mechanism and a filtering mechanism are installed in the base box (16); The gas replenishing mechanism is used to replenish argon gas to the refrigeration chamber (3); The filtering mechanism is used to filter the oxygen in the refrigeration chamber (3).

6. A high temperature resistant battery module for use in extreme environments according to claim 5, characterized in that: The air replenishing mechanism comprises a piston cylinder (17) and a piston plate (18); the piston cylinder (17) is installed in a base box (16), an opening of the piston cylinder (17) is connected to the refrigeration chamber (3), and the piston plate (18) is slidably installed in the piston cylinder (17).

7. The high temperature resistant battery module for use in extreme environments according to claim 5, characterized in that: The filtering mechanism comprises an air pump (19), a polymer membrane filter (20) and an oxygen adsorber (24); an air inlet end of the air pump (19) is connected to the interior of the refrigeration chamber (3), the air pump (19) is connected to an air outlet end of the oxygen adsorber (24), an air inlet end of the polymer membrane filter (20) is connected to an air outlet end of the air pump (19), and an air outlet end of the polymer membrane filter (20) is connected to the refrigeration chamber (3).

8. The high temperature resistant battery module for use in extreme environments according to claim 5, characterized in that: A ventilation channel is provided through the base box (16), and a heat dissipation fan (21) is installed in the ventilation channel.

9. The high temperature resistant battery module for use in extreme environments according to claim 1, characterized in that: The mounting bracket further comprises a plurality of strip-shaped limit mounting frames (22); the plurality of strip-shaped limit mounting frames (22) are respectively mounted on the upper and lower inner walls of the mounting box (4); and the battery body (2) is provided with a strip-shaped mounting groove (23) adapted to the strip-shaped limit mounting frames (22).

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