A battery pack with safety monitoring function

Abstract

The present invention discloses a battery pack with a safety monitoring function for use in the battery field. The battery pack monitors the temperature by adding a segmented variable temperature monitor on the basis of an existing battery pack. When the temperature of the battery pack exceeds a specified temperature, the segmented variable temperature monitor first deforms once to start a micro-electromagnetic relay and a semiconductor cooling sheet. The micro-electromagnetic relay cuts off the power of a single battery pack with abnormal temperature to block its continued charging and discharging, thereby playing an effective temperature control role. The semiconductor cooling sheet cools the single battery pack to effectively prevent the battery pack from temperature runaway. When the battery pack temperature runs away, the segmented variable temperature monitor deforms again to rupture a rupturable magnetic isolation cover, thereby quickly spraying out a liquid fire extinguishing agent, thereby taking preventive measures before the battery pack catches fire, effectively preventing the rapid spread and expansion of the fire, achieving stable monitoring of the battery pack, and effectively cooling the battery pack and preventing fire.

Description

Technical Field

[0001] The invention relates to the field of batteries, and in particular to a battery pack with a safety monitoring function. Background Art

[0002] Due to the very active chemical properties of lithium metal, the processing, storage and use of lithium metal have very high environmental requirements. With the development of science and technology, lithium batteries have become mainstream.

[0003] When using lithium batteries, special attention should be paid to temperature changes. Temperature has a great impact on batteries. Excessive temperature can cause battery fires, especially during the charging and discharging process and when working at high temperatures in summer. Existing temperature monitoring of lithium battery packs relies on temperature sensors. Although the monitoring accuracy is relatively high, temperature sensors can only play a monitoring role and cannot effectively cool down battery packs with excessively high temperatures. In addition, when temperature sensors fail, the stability of operation cannot be ensured.

[0004] To this end, we use this technical solution to solve the problem of unstable monitoring of existing battery packs. Summary of the invention

[0005] The purpose of the present invention is to improve the battery pack monitoring equipment in the prior art. Compared with the prior art, a battery pack with a safety monitoring function is provided. A segmented variable temperature monitor is added to the existing battery pack to perform temperature monitoring. When the battery pack exceeds the specified temperature under the charging and discharging state, the segmented variable temperature monitor first deforms once to make the porous top plate drive the elastic trigger ball to rise, so that the elastic trigger ball triggers the touch switch, and the touch switch then starts the micro electromagnetic relay and the semiconductor refrigeration plate. The micro electromagnetic relay cuts off the power of the single battery pack with abnormal temperature to block its continued charging and discharging, thereby playing an effective temperature control role. The cooling surface of the semiconductor refrigeration plate faces the single battery pack to cool it, effectively preventing the battery pack from temperature runaway. When the battery pack temperature runs away, the segmented variable temperature monitor deforms again to make the elastic trigger ball continue to rise, and the deformation of the elastic trigger ball is used to make the rupturable magnetic isolation cover rupture, so that the permanent magnet block repels the magnetic pressure plate downward and quickly sprays out the liquid fire extinguishing agent, thereby taking preventive measures before the battery pack catches fire, effectively preventing the rapid spread and expansion of the fire.

[0006] It can realize stable monitoring of battery packs, and effectively cool down battery packs and prevent fire.

[0007] Furthermore, the high-temperature deformation section and the low-temperature deformation section are arranged alternately, and the ring width of the high-temperature deformation section is larger than that of the low-temperature deformation section. The low-temperature deformation section is deformed first and then the high-temperature deformation section, so that the touch-pressure switch is activated first and then the liquid fire extinguishing agent is sprayed out, and the front and rear deformations of the low-temperature deformation section and the high-temperature deformation section will push up the porous top plate, so the ring width of the high-temperature deformation section is larger than that of the low-temperature deformation section.

[0008] Furthermore, the high-temperature deformation section and the low-temperature deformation section have the same structure. The high-temperature deformation section includes a fan-shaped elastic substrate, and the inner wall of the lower end of the fan-shaped elastic substrate is fixedly inlaid with a plurality of shape memory alloy strips distributed at equal intervals. The shape memory alloy strips face the single battery pack, so that the temperature changes of the single battery pack can be sensitively sensed. The shape memory alloy strips remain straight in the initial state, and when the temperature exceeds its deformation temperature, the shape memory alloy strips are deformed from a straight state to an upwardly bent state, thereby pushing the porous top plate upward to allow the elastic trigger ball to trigger the touch switch. When the temperature drops, the shape memory alloy strips return to a straight state again, thereby realizing accurate monitoring of the battery pack temperature and having high working stability.

[0009] Optionally, a liquid storage cavity is further provided on the inner wall of the annular base located on the inner side of the sliding cavity, and a magnetic liquid pressure plate is slidably connected to the inner wall of the liquid storage cavity, and liquid fire extinguishing agent is filled under the magnetic liquid pressure plate, an opening is provided on the inner wall at the lower end of the liquid storage cavity, and a sealing pad is bonded to the opening, a permanent magnet block that magnetically repels the magnetic liquid pressure plate is fixedly connected to the inner wall at the upper end of the liquid storage cavity, and a rupturable magnetic isolation cover is provided on the outer cover of the permanent magnet block, a flexible pad is fixedly embedded at the connection between the sliding cavity and the liquid storage cavity near the rupturable magnetic isolation cover, and a needle is fixedly connected to the flexible pad against the side wall of the liquid storage cavity, and when the temperature of a single battery pack is out of control, the deformation of the high-temperature deformation section causes the elastic trigger ball It continues to be pushed up, and due to the blocking effect of the touch switch and the sliding cavity, the elastic trigger ball is deformed and squeezes the flexible pad, and then the flexible pad is bent and deformed to allow the annular elastic compression pad to puncture the rupturable magnetic isolation cover. The rupturable magnetic isolation cover plays an effective magnetic isolation role before it is punctured, and when the rupturable magnetic isolation cover is ruptured, the magnetic repulsion force of the permanent magnet block on the magnetic pressure plate causes the magnetic pressure plate to pressurize the liquid fire extinguishing agent, and the gravity of the liquid fire extinguishing agent itself is used to flush the sealing pad, thereby rapidly spraying the liquid fire extinguishing agent downward, and effective preventive measures are taken in time before a single battery pack catches fire, thereby effectively preventing the rapid spread and expansion of the fire.

[0010] Optionally, the ruptureable magnetic isolation cover includes a balloon filled with carbon dioxide gas, and a magnetic shielding layer is bonded to the outer surface of the balloon. The internal carbon dioxide gas can also effectively extinguish fires, and the magnetic shielding layer acts as a magnetic isolation layer, which can effectively reduce the magnetic repulsion of the permanent magnet block on the magnetic pressure plate before the ruptureable magnetic isolation cover ruptures.

[0011] Furthermore, the elastic trigger ball is an elliptical ball structure, and the elastic trigger ball is made of elastic material. The elastic trigger ball slides up and down in the sliding cavity. When the elastic trigger ball is deformed in the low-temperature deformation section, it triggers the touch-pressure switch. When the elastic trigger ball is deformed in the high-temperature deformation section, it is deformed and squeezes the flexible pad due to the resistance of the touch-pressure switch and the inner wall of the sliding cavity, so that the needle can pierce the breakable magnetic isolation cover.

[0012] Furthermore, an annular elastic pressure pad is fixedly connected to the inner wall of the lower end of the battery compartment cover, and the annular elastic pressure pad contacts the upper surface of the single battery pack. The battery compartment cover and the battery compartment body fix the single battery pack in the fireproof isolation compartment. In order to prevent the single battery pack from shaking in the fireproof isolation compartment, an annular elastic pressure pad is used to fix the single battery pack, and it can also play an effective buffering and shock absorbing role.

[0013] Furthermore, the sealing pad is made of combustible material, and the bonding force between the sealing pad and the annular base is smaller than the sum of the gravity of the liquid fire extinguishing agent and the magnetic repulsion force between the permanent magnet block and the magnetic pressure plate. When the needle cannot successfully pierce the rupturable magnetic isolation cover, the sealing pad is ignited by flame after a single battery pack catches fire, thereby releasing the liquid fire extinguishing agent, which plays a double insurance role and prevents the liquid fire extinguishing agent from being unable to be released.

[0014] Compared with the prior art, the advantages of the present invention are:

[0015] (1) This scheme monitors the temperature by adding a segmented variable temperature monitor on the basis of the existing battery pack. When the battery pack exceeds the specified temperature during charging and discharging, the segmented variable temperature monitor first deforms once to make the porous top plate drive the elastic trigger ball to rise, so that the elastic trigger ball triggers the touch switch, and the touch switch then starts the micro electromagnetic relay and the semiconductor cooling plate. The micro electromagnetic relay cuts off the power of the single battery pack with abnormal temperature to prevent it from continuing to charge and discharge, which plays an effective temperature control role. The cooling surface of the semiconductor cooling plate faces the single battery pack to cool it down, effectively preventing the battery pack from temperature runaway. When the battery pack temperature runs away, the segmented variable temperature monitor deforms again to make the elastic trigger ball continue to rise. The deformation of the elastic trigger ball is used to break the ruptureable magnetic isolation cover, so that the permanent magnet block repels the magnetic pressure plate downward and quickly sprays out the liquid fire extinguishing agent, so that preventive measures can be taken before the battery pack catches fire, effectively preventing the rapid spread and expansion of the fire, realizing stable monitoring of the battery pack, and effectively cooling the battery pack and preventing fire.

[0016] (2) The high-temperature deformation section and the low-temperature deformation section are arranged alternately, and the ring width of the high-temperature deformation section is larger than that of the low-temperature deformation section. The low-temperature deformation section deforms first and then the high-temperature deformation section, so that the touch-pressure switch is activated first and then the liquid fire extinguishing agent is sprayed out. The front and rear deformations of the low-temperature deformation section and the high-temperature deformation section will push up the porous top plate, so the ring width of the high-temperature deformation section is larger than that of the low-temperature deformation section.

[0017] (3) The high-temperature deformation section and the low-temperature deformation section have the same structure. The high-temperature deformation section includes a fan-shaped elastic substrate, and the inner wall of the lower end of the fan-shaped elastic substrate is fixedly inlaid with a plurality of shape memory alloy strips distributed at equal intervals. The shape memory alloy strips face the single battery pack, so that the temperature change of the single battery pack can be sensitively sensed. The shape memory alloy strips remain straight in the initial state, and when the temperature exceeds its deformation temperature, the shape memory alloy strips are deformed from a straight state to an upwardly bent state, thereby pushing the multi-porous top plate upward to allow the elastic trigger ball to trigger the touch switch. When the temperature drops, the shape memory alloy strips return to a straight state again, thereby realizing accurate monitoring of the battery pack temperature and having high working stability.

[0018] (4) The inner wall of the annular base located on the inner side of the sliding cavity is also provided with a liquid storage cavity, the inner wall of the liquid storage cavity is slidably connected to a magnetic liquid pressure plate, and the bottom of the magnetic liquid pressure plate is filled with liquid fire extinguishing agent, the lower inner wall of the liquid storage cavity is provided with an opening, and a sealing pad is bonded to the opening, the upper inner wall of the liquid storage cavity is fixedly connected to a permanent magnet block that magnetically repels the magnetic liquid pressure plate, and the outer cover of the permanent magnet block is provided with a rupturable magnetic shield, a flexible pad is fixedly embedded at the connection between the sliding cavity and the liquid storage cavity near the rupturable magnetic shield, and a needle is fixedly connected to the side wall of the flexible pad facing the liquid storage cavity, when the temperature of a single battery pack is out of control, the deformation of the high temperature deformation section causes the elastic trigger ball to It continues to be pushed up, and due to the blocking effect of the touch switch and the sliding cavity, the elastic trigger ball is deformed and squeezes the flexible pad, and then the flexible pad is bent and deformed to allow the annular elastic compression pad to puncture the rupturable magnetic isolation cover. The rupturable magnetic isolation cover plays an effective magnetic isolation role before it is punctured, and when the rupturable magnetic isolation cover is ruptured, the magnetic repulsion force of the permanent magnet block on the magnetic pressure plate causes the magnetic pressure plate to pressurize the liquid fire extinguishing agent, and the gravity of the liquid fire extinguishing agent itself is used to flush the sealing pad, thereby rapidly spraying the liquid fire extinguishing agent downward, and effective preventive measures are taken in time before a single battery pack catches fire, thereby effectively preventing the rapid spread and expansion of the fire.

[0019] (5) The rupturable magnetic shield includes a balloon filled with carbon dioxide gas, and a magnetic shielding layer is bonded to the outer surface of the balloon. The internal carbon dioxide gas can also effectively extinguish fires, and the magnetic shielding layer plays a magnetic shielding role. Before the rupturable magnetic shield is ruptured, it can effectively reduce the magnetic repulsion of the permanent magnet block on the magnetic pressure plate.

[0020] (6) The elastic trigger ball is an elliptical ball structure, and the elastic trigger ball is made of elastic material. The elastic trigger ball slides up and down in the sliding cavity. When the elastic trigger ball is deformed in the low-temperature deformation section, it triggers the touch-pressure switch. When the elastic trigger ball is deformed in the high-temperature deformation section, it is deformed and squeezes the flexible pad due to the resistance of the touch-pressure switch and the inner wall of the sliding cavity, so that the needle can pierce the breakable magnetic shield.

[0021] (7) The inner wall of the lower end of the battery compartment cover is also fixedly connected with an annular elastic pressure pad, and the annular elastic pressure pad contacts the upper surface of the single battery pack. The battery compartment cover and the battery compartment body fix the single battery pack in the fireproof isolation compartment. In order to prevent the single battery pack from shaking in the fireproof isolation compartment, an annular elastic pressure pad is used to fix the single battery pack, and it can also play an effective buffering and shock absorbing role.

[0022] (8) The sealing pad is made of combustible material, and the bonding force between the sealing pad and the annular base is less than the sum of the gravity of the liquid fire extinguishing agent and the magnetic repulsion force between the permanent magnet block and the magnetic pressure plate. When the needle cannot successfully pierce the rupturable magnetic shield, the sealing pad is ignited by flame after a single battery pack catches fire, thereby releasing the liquid fire extinguishing agent, which plays a double insurance role and prevents the liquid fire extinguishing agent from being unable to be released. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is an overall stereogram of the present invention;

[0024] Figure 2 A schematic diagram of the installation position of a single battery pack of the present invention;

[0025] Figure 3 A diagram showing the connection between the fireproof isolation plate and the battery compartment body of the present invention;

[0026] Figure 4 is a side cross-sectional view of the present invention;

[0027] Figure 5 It is a three-dimensional diagram of the segmented temperature monitor of the present invention;

[0028] Figure 6 This is a state diagram of the low-temperature deformation section of the present invention when it is deformed;

[0029] Figure 7 This is a state diagram of the high temperature deformation section of the present invention when it is deformed;

[0030] Figure 8 It is a three-dimensional diagram of the high temperature deformation section of the present invention;

[0031] Fig. 9 A three-dimensional diagram of a porous top plate of the present invention;

[0032] Fig.10 is a cross-sectional view of the annular base of the present invention;

[0033] Fig.11 This is a state diagram of the elastic trigger ball of the present invention triggering the touch-pressure switch;

[0034] Fig.12 The diagram is a state diagram of the ruptureable magnetic shield of the present invention when it is ruptured.

[0035] Description of the numbers in the figure:

[0036] 1 battery compartment body, 101 fireproof isolation compartment, 2 fireproof isolation board, 3 single battery pack, 4 battery compartment cover, 5 miniature electromagnetic relay, 6 heat dissipation shell, 7 semiconductor refrigeration sheet, 8 segmented deformation type temperature monitor, 801 mounting ring, 802 elastic connecting ring, 803 high temperature deformation section, 8031 ​​fan-shaped elastic base plate, 8032 shape memory alloy strip, 804 low temperature deformation section, 9 porous top plate, 10 pillar, 11 elastic trigger ball, 12 annular base, 1201 sliding cavity, 1202 liquid storage cavity, 13 touch pressure switch, 14 magnetic pressure liquid plate, 15 liquid fire extinguishing agent, 16 sealing pad, 17 permanent magnet block, 18 rupturable magnetic isolation cover, 19 flexible pad, 20 thorn needle, 21 annular elastic compression pad. DETAILED DESCRIPTION

[0037] The embodiments will be combined with the drawings in the specification to clearly and completely describe the technical solution of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without making any creative work shall fall within the scope of protection of the present invention. Embodiment 1:

[0038] A battery pack with safety monitoring function, see Figure 1 , 2 , 3 and Figure 4 , comprising a battery compartment body 1, the inner wall of the battery compartment body 1 is fixedly connected with a fireproof isolation plate 2 which is cross-connected horizontally and vertically, and a plurality of fireproof isolation compartments 101 are formed between the fireproof isolation plate 2 and the inner wall of the battery compartment body 1, a single battery pack 3 is installed in each fireproof isolation compartment 101, and a micro-electromagnetic relay 5 (the specific model is selected according to actual needs) which is electrically connected to the single battery pack 3 is installed on the lateral inner wall of the fireproof isolation plate 2, and the plurality of micro-electromagnetic relays 5 are electrically connected to the power supply line of the battery pack at the same time (the specific connection structure and working principle are well-known technologies for technicians in the electrical field and will not be described in detail here), and a battery compartment cover 4 is connected to the top of the battery compartment body 1 (the specific connection method can preferably be welding connection, and other connection methods can also be selected according to actual needs) The fireproof insulation board 2 is also fixedly connected to the inner wall of the battery compartment cover 4, and a plurality of fireproof insulation compartments 101 are also enclosed between the fireproof insulation board 2 and the inner wall of the battery compartment cover 4. The upper side wall of the battery compartment cover 4 facing the fireproof insulation compartment 101 is connected to the heat dissipation shell 6, and a semiconductor refrigeration sheet 7 (the specific model is selected according to actual needs) is installed on the middle side wall of the heat dissipation shell 6, the heating surface of the semiconductor refrigeration sheet 7 faces the outside of the heat dissipation shell 6, and the cooling surface of the semiconductor refrigeration sheet 7 faces the inside of the heat dissipation shell 6, the inner wall of the battery compartment cover 4 located below the semiconductor refrigeration sheet 7 is fixedly connected to a segmented variable temperature monitor 8, and the battery compartment cover 4 is located above the segmented variable temperature monitor 8 and is slidably connected to a porous top plate 9;

[0039] See also Figure 5 , 6 , 7 and Figure 8 The segmented deformation type temperature monitor 8 includes a mounting ring 801, and an elastic connecting ring 802 (preferably made of fireproof rubber material, and other materials can also be selected according to actual needs) is fixedly connected to the inner side of the mounting ring 801, and a plurality of high-temperature deformation segments 803 and low-temperature deformation segments 804 are fixedly connected to the inner wall of the elastic connecting ring 802, and the high-temperature deformation segments 803 and the low-temperature deformation segments 804 are alternately arranged, and the ring width of the high-temperature deformation segment 803 is greater than the ring width of the low-temperature deformation segment 804, and the low-temperature deformation segment 804 is deformed first and then the high-temperature deformation segment 803 is deformed, so that the touch-pressure switch 13 is first activated and then the liquid fire extinguishing agent 15 is sprayed out, and the front and rear deformations of the low-temperature deformation segment 804 and the high-temperature deformation segment 803 will push up the porous top plate 9, so the ring width of the high-temperature deformation segment 803 is greater than the low-temperature deformation segment 804, and the deformation temperature of the high-temperature deformation segment 803 is higher than the deformation temperature of the low-temperature deformation segment 804 (the specific deformation temperatures of the two are determined according to actual needs The high temperature deformation section 803 and the low temperature deformation section 804 have the same structure. The high temperature deformation section 803 includes a fan-shaped elastic substrate 8031 ​​(preferably made of fireproof rubber material, and other materials can also be selected according to actual needs), and the inner wall of the lower end of the fan-shaped elastic substrate 8031 ​​is fixedly inlaid with a plurality of shape memory alloy strips 8032 distributed at equal intervals. The shape memory alloy strips 8032 are directly facing the single battery pack 3, so that the temperature change of the single battery pack 3 can be sensitively sensed. The shape memory alloy strips 8032 remain straight in the initial state, and when the temperature exceeds its deformation temperature, the shape memory alloy strips 8032 are deformed from a straight state to an upward bending state, thereby pushing the multi-porous top plate 9 upward to allow the elastic trigger ball 11 to trigger the touch switch 13. When the temperature drops, the shape memory alloy strips 8032 return to a straight state again, thereby realizing accurate monitoring of the battery pack temperature, and having high working stability;

[0040] See also Fig. 9 , 10The side walls on both sides of the upper end of the porous top plate 9 are fixedly connected with pillars 10, and the upper ends of the pillars 10 are fixedly connected with elastic trigger balls 11, which are elliptical ball structures and made of elastic material (preferably fireproof rubber material, and other materials can also be selected according to actual needs). The elastic trigger ball 11 slides up and down in the sliding cavity 1201. When the low-temperature deformation section 804 is deformed, the elastic trigger ball 11 triggers the touch-pressure switch 13, and when the high-temperature deformation section 803 is deformed, the elastic trigger ball 11 is deformed due to the resistance between the touch-pressure switch 13 and the inner wall of the sliding cavity 1201. The flexible pad 19 is deformed and squeezed to allow the needle 20 to pierce the breakable magnetic shield 18. The heat dissipation shell 6 is located on the upper inner wall of the outer side of the semiconductor cooling plate 7 and is fixedly connected with an annular base 12, and the inner wall of the annular base 12 is directly opposite to the elastic trigger ball 11 and is provided with a sliding cavity 1201 matching it. The upper inner wall of the sliding cavity 1201 is installed with a touch switch 13, and the touch switch 13 is electrically connected to the micro electromagnetic relay 5 and the semiconductor cooling plate 7 through the control processor (the specific connection structure and working principle are well-known technologies for technicians in the electrical field and will not be described in detail here);

[0041] See also Figure 4 The inner wall of the lower end of the battery compartment cover 4 is also fixedly connected with an annular elastic compression pad 21, and the annular elastic compression pad 21 contacts the upper surface of the single battery pack 3. The battery compartment cover 4 and the battery compartment body 1 fix the single battery pack 3 in the fireproof isolation compartment 101. In order to prevent the single battery pack 3 from shaking in the fireproof isolation compartment 101, the annular elastic compression pad 21 is used to fix the single battery pack 3, and it can also play an effective buffering and shock absorbing role. Embodiment 2:

[0042] Based on Example 1, please refer to Fig.10 , 11 and Fig.12The inner wall of the annular base 12 located inside the sliding cavity 1201 is also provided with a liquid storage cavity 1202, the inner wall of the liquid storage cavity 1202 is slidably connected with a magnetic liquid pressure plate 14, and the lower part of the magnetic liquid pressure plate 14 is filled with a liquid fire extinguishing agent 15, the lower inner wall of the liquid storage cavity 1202 is provided with an opening, and a sealing pad 16 is bonded to the opening, the sealing pad 16 is made of a combustible material (plastic material is preferably selected, and other materials can also be selected according to actual needs), and the bonding force between the sealing pad 16 and the annular base 12 is less than the sum of the gravity of the liquid fire extinguishing agent 15 and the magnetic repulsion force between the permanent magnet block 17 and the magnetic liquid pressure plate 14, when the needle 20 cannot break the ruptured partition When the magnetic cover 18 is successfully punctured, the flame is used to ignite the sealing pad 16 after the single battery pack 3 catches fire, thereby releasing the liquid fire extinguishing agent 15, which plays a double insurance role and prevents the liquid fire extinguishing agent 15 from being unable to be released. The inner wall of the upper end of the liquid storage chamber 1202 is fixedly connected to a permanent magnet block 17 that magnetically repels the magnetic pressure plate 14, and the outer cover of the permanent magnet block 17 is provided with a rupturable magnetic isolation cover 18. The rupturable magnetic isolation cover 18 includes a balloon filled with carbon dioxide gas, and a magnetic shielding layer is bonded to the outer surface of the balloon (copper foil is preferably used, and other magnetic isolation materials can also be selected according to actual needs). The internal carbon dioxide gas can also effectively extinguish the fire. Fire effect, and the magnetic shielding layer plays a magnetic isolation role. Before the rupturable magnetic isolation cover 18 is not ruptured, it can effectively weaken the magnetic repulsion effect of the permanent magnet block 17 on the magnetic pressure liquid plate 14. A flexible pad 19 (preferably silicone material, and other materials can also be selected according to actual needs) is fixedly embedded in the connection between the sliding cavity 1201 and the liquid storage cavity 1202 near the rupturable magnetic isolation cover 18, and the flexible pad 19 is fixedly connected with a needle 20 facing the side wall of the liquid storage cavity 1202. When the temperature of a single battery pack 3 is out of control, the deformation of the high-temperature deformation section 803 causes the elastic trigger ball 11 to continue to be pushed up. Due to the blocking effect of the touch-pressure switch 13 and the sliding cavity 1201, the elastic touch The ball 11 is deformed and squeezes the flexible pad 19, and then the flexible pad 19 is bent and deformed to allow the annular elastic compression pad 21 to puncture the rupturable magnetic shield 18. The rupturable magnetic shield 18 plays an effective magnetic shielding role before being punctured. When the rupturable magnetic shield 18 is ruptured, the magnetic repulsion force of the permanent magnet block 17 on the magnetic pressure plate 14 causes the magnetic pressure plate 14 to pressurize the liquid fire extinguishing agent 15, and the gravity of the liquid fire extinguishing agent 15 itself is used to flush the sealing pad 16, thereby rapidly spraying the liquid fire extinguishing agent 15 downward, and taking effective preventive measures in time before the single battery pack 3 catches fire, thereby effectively preventing the rapid spread and expansion of the fire.

[0043] The working principle of this scheme is as follows: first, multiple single-group battery packs 3 are installed one by one in each fireproof isolation compartment 101, and the circuits of the single-group battery packs 3 are connected to the micro-electromagnetic relay 5. The micro-electromagnetic relay 5 plays the role of switching control of the single-group battery pack 3, so as to realize the connection and disconnection of the single-group battery pack 3 with the entire battery pack. Then, the battery compartment cover 4 is covered on the battery compartment body 1 to realize the closed packaging of the entire battery pack. When the temperature of the single-group battery pack 3 rises during the charging and discharging process and exceeds its specified safety temperature, the low-temperature deformation section 804 first generates an upward bending deformation The low-temperature deformation section 804 then pushes the porous top plate 9 upward, and the porous top plate 9 moves upward with the elastic trigger ball 11 to trigger the touch-pressure switch 13. The touch-pressure switch 13 starts the micro-electromagnetic relay 5 and the semiconductor cooling sheet 7 at the same time through the control processor. The micro-electromagnetic relay 5 cuts off the circuit connection between the single battery pack 3 and the entire battery pack to stop the single battery pack 3 from working and control its temperature to continue to rise, thereby playing a role in temperature control. After the semiconductor cooling sheet 7 is started, it starts to cool down, thereby cooling the single battery pack 3, effectively preventing the temperature of the single battery pack 3 from continuing to rise and causing temperature out of control;

[0044] After the temperature of the single battery pack 3 drops, the low temperature deformation section 804 recovers its deformation, and the elastic trigger ball 11 is separated from the touch-pressure switch 13. At this time, the micro electromagnetic relay 5 reopens the circuit connection between the single battery pack 3 and the battery pack, so that the single battery pack 3 can work normally. When the temperature of the single battery pack 3 is out of control, the temperature needs to be increased to make the low temperature deformation section 804 and the high temperature deformation section 803 deform forward and backward. The deformation of the high temperature deformation section 803 allows the elastic trigger ball 11 to continue to rise on the basis of the deformation of the low temperature deformation section 804. Due to the blocking effect of the touch-pressure switch 13 and the sliding cavity 1201, the elastic trigger ball 11 1 is deformed and squeezes the flexible pad 19, and then the flexible pad 19 is bent and deformed to allow the annular elastic compression pad 21 to puncture the rupturable magnetic shield 18. The rupturable magnetic shield 18 plays an effective magnetic shielding role before being punctured. When the rupturable magnetic shield 18 is ruptured, the magnetic repulsion force of the permanent magnet block 17 on the magnetic liquid pressure plate 14 causes the magnetic liquid pressure plate 14 to pressurize the liquid fire extinguishing agent 15, and the gravity of the liquid fire extinguishing agent 15 itself is added to flush the sealing pad 16, so that the liquid fire extinguishing agent 15 is quickly sprayed downward, and effective preventive measures are taken in time before the single battery pack 3 catches fire, thereby effectively preventing the rapid spread and expansion of the fire.

[0045] The above description is only the best implementation mode adopted by the present invention in combination with current practical needs, but the protection scope of the present invention is not limited thereto.

Claims

1. A battery pack with a safety monitoring function, comprising a battery compartment (1), characterized in that: The inner wall of the battery compartment body (1) is fixedly connected with a fireproof isolation plate (2) which is cross-connected horizontally and vertically, and a plurality of fireproof isolation chambers (101) are formed between the fireproof isolation plate (2) and the inner wall of the battery compartment body (1), each of the fireproof isolation chambers (101) is installed with a single battery pack (3), and a micro-electromagnetic relay (5) which is electrically connected to the single battery pack (3) is installed on the lateral inner wall of the fireproof isolation plate (2), and the plurality of micro-electromagnetic relays (5) are electrically connected to the power supply line of the battery pack at the same time, a battery compartment cover (4) is connected above the battery compartment body (1), and the inner wall of the battery compartment cover (4) is also fixedly connected with the fireproof isolation plate (2), and a plurality of fireproof isolation chambers (101) are also formed between the fireproof isolation plate (2) and the inner wall of the battery compartment cover (4), and the upper side wall of the battery compartment cover (4) which is opposite to the fireproof isolation chamber (101) is connected with a heat dissipation shell (6). , and a semiconductor cooling sheet (7) is installed on the middle side wall of the heat dissipation shell (6), the heating surface of the semiconductor cooling sheet (7) faces the outside of the heat dissipation shell (6), and the cooling surface of the semiconductor cooling sheet (7) faces the inside of the heat dissipation shell (6), the inner wall of the battery compartment cover (4) located below the semiconductor cooling sheet (7) is fixedly connected to a segmented deformable temperature monitor (8), and the battery compartment cover (4) is slidably connected to a porous top plate (9) located above the segmented deformable temperature monitor (8), the segmented deformable temperature monitor (8) comprises a mounting ring (801), and an elastic connecting ring (802) is fixedly connected to the inner side of the mounting ring (801), and a plurality of high-temperature deformation sections (803) and low-temperature deformation sections (804) are fixedly connected to the inner wall of the elastic connecting ring (802), and the deformation temperature of the high-temperature deformation section (803) is higher than the deformation temperature of the low-temperature deformation section (804); The high temperature deformation sections (803) and the low temperature deformation sections (804) are arranged alternately, and the ring width of the high temperature deformation sections (803) is greater than the ring width of the low temperature deformation sections (804); the high temperature deformation sections (803) and the low temperature deformation sections (804) have the same structure; the high temperature deformation sections (803) include a fan-shaped elastic base plate (8031), and a plurality of shape memory alloy strips (8032) distributed at equal intervals are fixedly inlaid on the inner wall of the lower end of the fan-shaped elastic base plate (8031); The upper side walls of the porous top plate (9) are fixedly connected to pillars (10), and the upper ends of the pillars (10) are fixedly connected to elastic trigger balls (11); the upper inner wall of the heat dissipation shell (6) located outside the semiconductor cooling plate (7) is fixedly connected to an annular base (12); the inner wall of the annular base (12) facing the elastic trigger ball (11) is provided with a sliding cavity (1201) matching the elastic trigger ball (11); the upper inner wall of the sliding cavity (1201) is installed with a touch switch (13), and the touch switch (13) is electrically connected to the micro electromagnetic relay (5) and the semiconductor cooling plate (7) through a control processor; The inner wall of the annular base (12) located inside the sliding cavity (1201) is further provided with a liquid storage cavity (1202); the inner wall of the liquid storage cavity (1202) is slidably connected to a magnetic liquid pressure plate (14), and the bottom of the magnetic liquid pressure plate (14) is filled with liquid fire extinguishing agent (15); the lower inner wall of the liquid storage cavity (1202) is provided with an opening, and a sealing pad (16) is bonded to the opening; the upper inner wall of the liquid storage cavity (1202) is fixedly connected to a magnetic liquid pressure plate (14). A repelling permanent magnet block (17) is provided, and the outer cover of the permanent magnet block (17) is provided with a rupturable magnetic shielding cover (18), the rupturable magnetic shielding cover (18) comprises a balloon filled with high-pressure carbon dioxide gas, and the outer surface of the balloon is bonded with a magnetic shielding layer, a flexible pad (19) is fixedly embedded in the connection between the sliding cavity (1201) and the liquid storage cavity (1202) near the rupturable magnetic shielding cover (18), and a puncture needle (20) is fixedly connected to the flexible pad (19) facing the side wall of the liquid storage cavity (1202).

2. A battery pack with safety monitoring function according to claim 1, characterized in that: The elastic trigger ball (11) is an elliptical ball structure, and the elastic trigger ball (11) is made of elastic material.

3. A battery pack with safety monitoring function according to claim 1, characterized in that: An annular elastic compression pad (21) is also fixedly connected to the inner wall of the lower end of the battery compartment cover (4), and the annular elastic compression pad (21) is in contact with the upper surface of the single battery pack (3).

4. A battery pack with safety monitoring function according to claim 1, characterized in that: The sealing pad (16) is made of a combustible material, and the bonding force between the sealing pad (16) and the annular base (12) is smaller than the sum of the gravity of the liquid fire extinguishing agent (15) and the magnetic repulsive force between the permanent magnet block (17) and the magnetic liquid pressure plate (14).

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