Comprehensive detection device for battery temperature of electric vehicle

Abstract

The invention belongs to the technical field of battery detection, and discloses an electric vehicle battery temperature comprehensive detection device, which comprises a detection master control module and an outer side temperature detection mechanism, and is characterized in that the two sides of the detection master control module are symmetrically provided with assembling assemblies, and the assembling assemblies are vertically symmetrically distributed between adjacent battery modules; an elastic supporting piece is elastically connected between the upper assembling assembly and the lower assembling assembly. According to the invention, the gap temperature detection mechanism located in the gap between the adjacent batteries is matched with the outer side temperature detection mechanism on the outer surface of the battery module, so that the multi-dimensional comprehensive monitoring of the battery temperature field is realized, and the elastic support piece with the temperature sensing plate is arranged in the core hot area between the adjacent batteries; compared with traditional point-mode temperature measurement, the temperature field distribution of the whole battery pack can be reflected more comprehensively and truly, and missing detection of local overheat points is effectively avoided.

Description

Technical Field

[0001] This invention belongs to the field of battery testing technology, specifically a comprehensive testing device for the temperature of electric vehicle batteries. Background Technology

[0002] As an important development direction to replace traditional fuel vehicles, the safety and performance of the core component, the power battery pack, are of paramount importance for electric vehicles. As the current mainstream power battery, the performance, lifespan, and safety of lithium-ion batteries are closely related to temperature. During charging and discharging, heat will inevitably be generated inside the battery, which usually requires monitoring and handling of the battery temperature.

[0003] However, existing electric vehicle battery temperature detection devices still face technical challenges during detection: First, the temperature monitoring points are sparse and cannot fully reflect the temperature field distribution of the battery pack. Currently, temperature sensors are usually selected to be placed in some areas of the battery module, which cannot adapt to the complex temperature distribution inside the battery pack. Due to factors such as structure, assembly and uneven cooling, the temperature in different locations inside the battery pack often varies significantly. Based on data from only a few points, it is impossible to accurately assess the true thermal state of the entire battery pack, which poses a serious safety hazard. Secondly, there is a lack of direct monitoring of the temperature of key microenvironments such as cell gaps. The narrow gaps between battery modules can lead to internal heat accumulation, and the temperature inside the gaps is often higher than the surface temperature, which can more accurately reflect the battery status. However, traditional detection methods are difficult to achieve comprehensive monitoring and lack the ability to dynamically sense temperature gradients, resulting in poor overall detection performance. Summary of the Invention

[0004] The purpose of this invention is to provide a comprehensive detection device for the temperature of electric vehicle batteries to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a comprehensive detection device for electric vehicle battery temperature, comprising a detection control module and an outer temperature detection mechanism. Assembly components are symmetrically arranged on both sides of the detection control module, and these assembly components are symmetrically distributed vertically between adjacent battery modules. An elastic support is elastically connected between the upper and lower sets of assembly components. A gap temperature detection mechanism is nested on both sides of the elastic support, and the gap temperature detection mechanism is electrically connected to the detection control module. A thermal pushing mechanism is provided inside each assembly component. The upper and lower thermal pushing mechanisms absorb the battery module temperature and control the position of the elastic support. An auxiliary magnetic control mechanism is provided on the inner side of both the upper and lower sets of assembly components. The two auxiliary magnetic control mechanisms are symmetrically arranged about the center point of the elastic support. The upper and lower sets of auxiliary magnetic control mechanisms control the elastic support between adjacent battery modules to deflect and swing. A height sensor is provided on both sides of the elastic support.

[0006] Preferably, the outer temperature detection mechanism is electrically connected to the detection control module, the outer temperature detection mechanism corresponds one-to-one with the battery module, and the outer temperature detection mechanism is attached to the battery module.

[0007] Preferably, the assembly component includes an assembly frame, an auxiliary frame, and a support rod. The auxiliary frames are symmetrically connected to both sides of the assembly frame. One end of the support rod is fixedly connected to an auxiliary frame, and the other end of the support rod is fixedly connected to the detection control module.

[0008] Preferably, the thermal actuation mechanism includes a main airbag, side airbags, a push rod, and a second magnetic block. The main airbag is fitted inside the assembly frame, and one end of the main airbag is fixed to the assembly frame. The side airbags are nested inside the auxiliary frame and are connected to both sides of the main airbag. The push rod is movably fitted to the bottom of the assembly frame, and one end of the push rod is fixedly connected to the main airbag. The second magnetic block is fixed to the other end of the push rod.

[0009] Preferably, the elastic support includes an assembly plate, a magnetic sheet, and a spring. The magnetic sheet is symmetrically and fixedly nested on the upper and lower surfaces of the assembly plate. One end of the spring is fixedly connected to the magnetic sheet, and the other end of the spring is fixedly connected to the assembly frame.

[0010] Preferably, the gap temperature detection mechanism includes a temperature sensing plate and a temperature sensing wire. One end of the temperature sensing wire is electrically connected to the temperature sensing plate, and the other end of the temperature sensing wire is electrically connected to the detection control module. The temperature sensing plate is fixedly nested on the front side of the assembly plate.

[0011] Preferably, the auxiliary magnetic control mechanism includes an electric push rod and a magnetic block. The free end of the electric push rod is fixedly connected to the magnetic block. When the magnetic block approaches the magnetic sheet, it repels and pushes the magnetic sheet to move.

[0012] Preferably, the outer side of the detection control module is provided with a ventilation component, and the interior of the elastic support is provided with a purge air passage. The ventilation component is used to input airflow into the purge air passage.

[0013] Preferably, the ventilation assembly includes a duct, a fan, an air guide pipe, and a distribution frame. The duct and the distribution frame are both fixed on the detection control module. The air guide pipe is connected between the duct and the distribution frame, and the fan is installed in the duct.

[0014] Preferably, the purge air passage includes an internal cavity and a purge port. The internal cavity is opened inside the assembly plate, and the purge port is opened on the front and back surfaces of the assembly plate and communicates with the internal cavity. A vent pipe is fixedly connected to one end of the assembly plate. One end of the vent pipe communicates with the internal cavity, and the other end of the vent pipe communicates with the distribution frame.

[0015] The beneficial effects of this invention are as follows: (1) The present invention achieves multi-dimensional comprehensive monitoring of the battery temperature field by using a gap temperature detection mechanism located between adjacent batteries and an outer temperature detection mechanism on the outer surface of the battery module. Furthermore, the elastic support with a temperature-sensing plate is placed in the core hot zone between adjacent batteries, thereby simultaneously obtaining the macroscopic surface temperature and the internal temperature of the key gap. Compared with traditional point temperature measurement, it can more comprehensively and realistically reflect the temperature field distribution of the entire battery pack, effectively avoiding the omission of local hot spots.

[0016] (2) This invention utilizes a passive thermal drive mechanism to achieve direct and real-time sensing of the vertical temperature gradient between battery modules. Specifically, by utilizing the principle of thermal expansion and contraction of gas, the temperature difference between the upper and lower ends of the battery module is converted into the height change of the elastic support through the differential displacement of the thermal drive mechanism. This can directly and sensitively reflect the vertical temperature imbalance between battery modules, providing guidance for more precise temperature balance control and early warning of thermal runaway.

[0017] (3) The present invention achieves fine detection and precise active heat dissipation of the battery gap area by cooperating with the active auxiliary magnetic control mechanism and the purge air channel. On the one hand, by making the elastic support actively deflect and sweep, it can detect the temperature at different positions in the gap, thereby further improving the temperature detection range. On the other hand, by inputting the air-cooled airflow to the deflectable elastic support, when abnormal overheating is detected, in-situ and precise forced air cooling can be performed immediately, thereby improving the system's response speed and efficiency in dealing with the risk of local overheating. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2This is a schematic diagram showing the connection between the assembly components and the detection control module of the present invention; Figure 3 This is a schematic diagram showing the connection between the assembly component and the elastic support member of the present invention; Figure 4 This is a cross-sectional schematic diagram of the elastic support member of the present invention; Figure 5 This is a cross-sectional view of the assembly components and the thermally driven mechanism of the present invention; Figure 6 This is a cross-sectional view of the assembly plate and the gap temperature detection mechanism of the present invention; Figure 7 for Figure 6 Enlarged structural diagram at point A; Figure 8 This is an exploded schematic diagram of the ventilation component of the present invention.

[0019] In the diagram: 1. Overall control module; 2. External temperature detection mechanism; 3. Assembly components; 301. Assembly frame; 302. Auxiliary frame; 303. Support rod; 4. Elastic support component; 401. Assembly plate; 402. Magnetic sheet; 403. Spring; 5. Gap temperature detection mechanism; 501. Temperature sensing plate; 502. Temperature sensing wire; 6. Auxiliary magnetic control mechanism; 601. Electric push rod; 602. Magnetic block one; 7. Purge air passage; 701. Internal cavity; 702. Purge port; 8. Ventilation pipe; 9. Thermal propulsion mechanism; 901. Main airbag; 902. Side airbag; 903. Push rod; 904. Magnetic block two; 10. Ventilation assembly; 101. Air duct; 102. Fan; 103. Air guide pipe; 104. Distribution frame. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] like Figures 1 to 8As shown, this embodiment of the invention provides a comprehensive detection device for the temperature of an electric vehicle battery, including a detection control module 1 and an outer temperature detection mechanism 2. Assembly components 3 are symmetrically arranged on both sides of the detection control module 1, and are symmetrically distributed vertically between adjacent battery modules. An elastic support 4 is elastically connected between the upper and lower assembly components 3. A gap temperature detection mechanism 5 is nested on both sides of the elastic support 4 and is electrically connected to the detection control module 1. A thermal pushing mechanism 9 is provided inside the assembly component 3. The upper and lower thermal pushing mechanisms 9 absorb the temperature of the battery modules and control the position of the elastic support 4. An auxiliary magnetic control mechanism 6 is provided on the inner side of both the upper and lower assembly components 3. The two auxiliary magnetic control mechanisms 6 are symmetrically arranged about the center point of the elastic support 4. The upper and lower auxiliary magnetic control mechanisms 6 control the elastic support 4 to deflect and swing between adjacent battery modules. A height sensor (an existing Honeywell LC series miniature linear displacement sensor) is provided on both sides of the elastic support 4.

[0022] Example 1: During battery operation, the thermal pushing mechanism 9 inside the upper and lower assembly components 3 absorbs heat from the upper and lower ends of the battery module through its side airbags 902. The gas inside the side airbags 902 expands due to heat, pushing the main airbag 901 to expand, thereby causing the push rod 903 to extend. Since there may be a temperature difference between the upper and lower ends of the battery module (i.e., there is a vertical temperature gradient), the degree of gas expansion of the two thermal pushing mechanisms 9 will also be different, resulting in a difference in the extension displacement of the two push rods 903. There is a magnetic repulsion between the magnetic block 904 at the bottom of the two push rods 903 and the magnetic sheet 402 at the upper and lower ends of the elastic support 4. The difference in displacement will lead to an imbalance of the upper and lower magnetic repulsion, thereby causing the elastic support 4, which was originally in a horizontal state, to undergo a small vertical displacement. This displacement is detected in real time by the height sensor on it. This height change value directly and quantitatively reflects the magnitude of the vertical temperature gradient between adjacent battery modules.

[0023] Among them, the outer temperature detection mechanism 2 is electrically connected to the detection control module 1, the outer temperature detection mechanism 2 corresponds one-to-one with the battery module, and the outer temperature detection mechanism 2 is attached to the battery module.

[0024] The outer temperature detection mechanism 2 has an existing Honeywell 192-502LET-A01 (thin-film NTC temperature probe) built in, which is attached to the battery surface by adhesive to perform large-area surface temperature measurement.

[0025] The external temperature detection mechanism 2 is installed on the outside of the battery module to detect the temperature of the outer surface of the battery module under contact, and the detection data is input into the detection control module 1.

[0026] The assembly component 3 includes an assembly frame 301, an auxiliary frame 302, and a support rod 303. The auxiliary frame 302 is symmetrically connected to both sides of the assembly frame 301. One end of the support rod 303 is fixedly connected to an auxiliary frame 302, and the other end of the support rod 303 is fixedly connected to the detection control module 1. The thermal push mechanism 9 includes a main airbag 901, a side airbag 902, a push rod 903, and a second magnetic block 904. The main airbag 901 is fitted inside the assembly frame 301, and one end of the main airbag 901 is fixed in the assembly frame 301. The side airbag 902 is nested inside the auxiliary frame 302 and is connected to both sides of the main airbag 901. The push rod 903 is movably fitted to the bottom of the assembly frame 301, and one end of the push rod 903 is fixedly connected to the main airbag 901. The second magnetic block 904 is fixed to the other end of the push rod 903.

[0027] The thermally driven mechanism 9 is assembled using assembly component 3 and supported by a fixed connection with the detection control module 1. Support rod 303 maintains support through connection and fixation, ensuring assembly component 3 is stable between adjacent battery modules. The main airbag 901, connected to the thermally driven mechanism 9, is nested within assembly frame 301, with only one end fixedly connected inside to ensure full expansion of the main airbag 901. Side airbags 902, nested within auxiliary frame 302, cannot expand on their own but are used to communicate with the main airbag 901. The auxiliary frame 302 expands the contact area with the battery end, absorbing heat from a larger area of ​​the battery end. The gas filling the side airbags 902 absorbs heat and diffuses its volume, thus directionally expanding the connected main airbag 901. The expansion of the main airbag 901 drives the push rod 903. As the magnetic block 904 moves, when the battery end heats up, the thermal push mechanism 9 absorbs more heat and expands, resulting in a large displacement of the push rod 903. This displacement is also reflected in the displacement of the magnetic block 904. The thermal push mechanism 9, distributed vertically, senses the temperature difference between the upper and lower regions of adjacent battery ends, causing the electromagnetic blocks 904 located at the upper and lower parts of the elastic support 4 to have different displacements. Under different displacements, the repulsive force intensity on the upper and lower parts of the elastic support 4 is different, causing the elastic support 4 to shift to different degrees vertically. The height sensor on the elastic support 4 senses the height change, and the temperature difference between the upper and lower regions of the battery module end is assessed by the height change difference. The larger the height displacement, the larger the temperature difference between the upper and lower parts of the battery end, thus realizing the temperature difference detection of adjacent battery end regions.

[0028] The elastic support 4 includes an assembly plate 401, a magnetic sheet 402, and a spring 403. The magnetic sheet 402 is symmetrically and fixedly nested on the upper and lower surfaces of the assembly plate 401. One end of the spring 403 is fixedly connected to the magnetic sheet 402, and the other end of the spring 403 is fixedly connected to the assembly frame 301.

[0029] The elastic support 4 is elastically connected by springs 403 at the top and bottom. When there is no temperature difference between the upper and lower regions, the magnetic repulsion force on the upper and lower sides is the same, and there is no displacement difference. When the temperature difference between the upper and lower regions is large, the magnetic thrust at the upper and lower regions is different, causing the elastic support 4 to shift. The springs 403 facilitate adaptive displacement on the one hand, and elastic reset on the other hand, automatically calibrating the initial position. The magnetic sheet 402 and the magnetic block 904 generate a relative repulsive force, and the magnitude of the repulsive force changes depending on their position.

[0030] The gap temperature detection mechanism 5 includes a temperature sensing plate 501 and a temperature sensing wire 502. One end of the temperature sensing wire 502 is electrically connected to the temperature sensing plate 501, and the other end of the temperature sensing wire 502 is electrically connected to the detection control module 1. The temperature sensing plate 501 is fixedly nested on the front of the assembly plate 401.

[0031] The temperature sensing plate 501 is an existing temperature sensing element, specifically model Murata NCP15XH103F03RC (NTC 10kΩ, 0603), which is suitable for battery bonding detection.

[0032] The gap temperature detection mechanism 5 uses a temperature sensing plate 501 and a temperature sensing wire to detect the contact between the ends of adjacent battery modules and transmits the detection information to the detection control module 1.

[0033] The auxiliary magnetic control mechanism 6 includes an electric push rod 601 and a magnetic block 602. The free end of the electric push rod 601 is fixedly connected to the magnetic block 602. When the magnetic block 602 approaches the magnetic sheet 402, it repels and pushes the magnetic sheet 402 to move.

[0034] Example 2: When a more precise temperature distribution scan of the gap between the battery modules is required, the detection control module 1 will activate the auxiliary magnetic control mechanism 6. The two sets of symmetrically distributed electric push rods 601 will drive the magnetic blocks 602 to move synchronously. The magnetic block 602 located on the upper right side of the elastic support 4 moves downward, and the magnetic block 602 located on the lower left side of the elastic support 4 moves upward. Through the magnetic repulsion between the magnetic block 602 and the magnetic sheet 402 on the elastic support 4, a magnetic force is generated, which will generate a torque on the elastic support 4, causing it to deflect and swing around its own center point. As the elastic support 4 deflects, the temperature sensing plates 501 of the gap temperature detection mechanism 5 on both sides will slide and scan a small range on the side wall of the battery module, thereby obtaining temperature data at different heights or positions within the gap, and completing the precise detection of the gap temperature field.

[0035] The auxiliary magnetic control mechanism 6 is specifically distributed at the top and bottom of adjacent battery modules, that is, on the top and bottom sides of the elastic support 4. Furthermore, the auxiliary magnetic control mechanism 6, which is distributed vertically, is also symmetrically distributed horizontally in space. The electric push rod 601 controls the magnetic block 602 to approach the elastic support 4, and uses the repulsive force of the magnetic block 602 on the magnetic sheet 402 to push the elastic support 4 to move. Through the synchronous start control of the two centrally symmetrical auxiliary magnetic control mechanisms 6, the top right side and bottom left side of the elastic support 4 are simultaneously pushed, and under the action of the constructed torque, the elastic support 4 is pushed to deflect in its central area. This causes the elastic support 4 equipped with the gap temperature detection mechanism 5 to change the contact area with the end of the battery module under deflection, thereby realizing the contact temperature detection of each area at the end and further obtaining the battery temperature.

[0036] The detection control module 1 has an external ventilation component 10 and an internal purge airway 7. The ventilation component 10 is used to input airflow into the purge airway 7.

[0037] By using the ventilation component 10 to input airflow into the purge airway 7, and through the purge airway 7 in the elastic support 4, the gap between adjacent batteries is specifically purged and cooled, so as to avoid excessive temperature between adjacent battery modules and achieve targeted heat dissipation after comprehensive testing.

[0038] Furthermore, by utilizing the aforementioned auxiliary magnetic control mechanism 6 to control the deflection of the elastic support 4, the purging air passage 7 on the elastic support 4 is deflected accordingly, dynamically changing the purging direction, thereby achieving further comprehensive purging and cooling between adjacent battery modules.

[0039] The ventilation assembly 10 includes a duct 101, a fan 102, an air duct 103, and a distribution frame 104. The duct 101 and the distribution frame 104 are both fixed on the detection control module 1. The air duct 103 is connected between the duct 101 and the distribution frame 104. The fan 102 is installed in the duct 101.

[0040] The ventilation assembly 10 guides airflow through the air duct 101, the air guide pipe 103 and the distribution frame 104. The fan 102 provides the airflow, and other air sources such as injection fans or micro air pumps can also be used.

[0041] The purge air passage 7 includes an internal cavity 701 and a purge port 702. The internal cavity 701 is located inside the assembly plate 401, and the purge port 702 is located on the front and back surfaces of the assembly plate 401. The purge port 702 is connected to the internal cavity 701. One end of the assembly plate 401 is fixedly connected to a vent pipe 8. One end of the vent pipe 8 is connected to the internal cavity 701, and the other end of the vent pipe 8 is connected to the distribution frame 104.

[0042] Example 3: When the detection control module 1 determines that there is a risk of local overheating in the gap of one or more battery modules based on the collected multi-dimensional temperature data, the ventilation component 10 is activated. The fan 102 generates airflow, which is delivered to the corresponding elastic support 4 through the air duct 103 and the distribution frame 104. The airflow is finally blown out from the blow-out ports 702 on both sides of the elastic support 4, which performs targeted and active forced air cooling on the high-temperature battery module gap. Combined with the above-mentioned active scanning action, the dynamic and all-round blowing and heat dissipation of the gap area is further completed.

[0043] The airflow in the distribution frame 104 is introduced into the internal cavity 701 through the vent pipe 8, and blown into the gap area between adjacent battery modules through the purge port 702 to complete the auxiliary purging and cooling. For any abnormal battery temperature detected, timely and targeted heat dissipation and cooling can be performed.

[0044] Working principle and usage process of this invention: Multi-dimensional temperature information acquisition The device is installed inside the battery pack, with its multiple assembly components 3 located between adjacent battery modules. After the system is powered on, it begins to collect temperature information. The outer temperature detection mechanism 2, fixed on the surface of each battery module, measures and uploads the macroscopic surface temperature of each battery module to the detection control module 1 in real time; the elastic support 4, located in the gap between adjacent battery modules, has temperature sensing plates 501 of the gap temperature detection mechanism 5 on both sides that are in close contact with the side wall of the battery module, and measures and uploads the core temperature inside the gap in real time. Passive sensing of temperature gradient based on thermal expansion During battery operation, the thermal push mechanism 9 inside the upper and lower assembly components 3 absorbs heat from the upper and lower ends of the battery module through its side airbags 902. The gas inside the side airbags 902 expands due to heat, pushing the main airbag 901 to expand, which in turn causes the push rod 903 to extend. Since there may be a temperature difference between the upper and lower ends of the battery module (i.e., there is a vertical temperature gradient), the degree of gas expansion of the two thermal push mechanisms 9 will also be different, resulting in a difference in the extension displacement of the two push rods 903. There is a magnetic repulsion between the magnetic block 904 at the bottom of the two push rods 903 and the magnetic sheet 402 at the upper and lower ends of the elastic support 4. The difference in displacement will lead to an imbalance of the upper and lower magnetic repulsion, which causes the elastic support 4, which was originally in a horizontal state, to undergo a small vertical displacement. This displacement is detected in real time by the height sensor on it. This height change value directly and quantitatively reflects the magnitude of the vertical temperature gradient between adjacent battery modules. Active scanning multi-point temperature detection When a more precise temperature distribution scan of the gap between the battery modules is required, the detection control module 1 will activate the auxiliary magnetic control mechanism 6. The two sets of symmetrically distributed electric push rods 601 will drive the magnetic blocks 602 to move synchronously. The magnetic block 602 located on the upper right side of the elastic support 4 moves downward, and the magnetic block 602 located on the lower left side of the elastic support 4 moves upward. Through the magnetic repulsion between the magnetic block 602 and the magnetic sheet 402 on the elastic support 4, a magnetic force is generated. The force will generate a torque on the elastic support 4, causing it to deflect and swing around its own center point. As the elastic support 4 deflects, the temperature sensing plates 501 of the gap temperature detection mechanism 5 on both sides will slide and scan a small range on the side wall of the battery module, thereby obtaining temperature data at different heights or positions within the gap, and realizing a precise detection of the gap temperature field. Active heat dissipation and cooling When the detection control module 1 determines that there is a risk of local overheating in the gap of one or more battery modules based on the collected multi-dimensional temperature data, it activates the ventilation component 10. The fan 102 generates airflow, which is delivered to the corresponding elastic support 4 through the air duct 103 and the distribution frame 104. The airflow is finally blown out from the blow-out ports 702 on both sides of the elastic support 4, which performs targeted and active forced air cooling on the high-temperature battery module gap. Combined with the above-mentioned active scanning action, it further completes the dynamic and all-round blowing and heat dissipation of the gap area.

[0045] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A comprehensive detection device for the temperature of an electric vehicle battery, comprising a central control module (1) and an external temperature detection mechanism (2), characterized in that: The detection control module (1) is symmetrically provided with assembly components (3) on both sides. The assembly components (3) are symmetrically distributed between adjacent battery modules. The upper and lower sets of assembly components (3) are elastically connected by elastic support members (4). The two sides of the elastic support members (4) are nested with gap temperature detection mechanisms (5). The gap temperature detection mechanisms (5) are electrically connected to the detection control module (1). The assembly components (3) are provided with thermal pushing mechanisms (9). The upper and lower thermal pushing mechanisms (9) absorb the temperature of the battery modules and control the position of the elastic support members (4). The inner sides of the upper and lower sets of assembly components (3) are provided with auxiliary magnetic control mechanisms (6). The two auxiliary magnetic control mechanisms (6) are symmetrically arranged about the center point of the elastic support members (4). The upper and lower sets of auxiliary magnetic control mechanisms (6) control the elastic support members (4) to deflect and swing between adjacent battery modules. The two sides of the elastic support members (4) are provided with height sensors.

2. The comprehensive detection device for electric vehicle battery temperature according to claim 1, characterized in that: The outer temperature detection mechanism (2) is electrically connected to the detection control module (1), and the outer temperature detection mechanism (2) corresponds to the battery module one by one. The outer temperature detection mechanism (2) is attached to the battery module.

3. The comprehensive detection device for electric vehicle battery temperature according to claim 2, characterized in that: The assembly component (3) includes an assembly frame (301), an auxiliary frame (302), and a support rod (303). The auxiliary frame (302) is symmetrically connected to both sides of the assembly frame (301). One end of the support rod (303) is fixedly connected to an auxiliary frame (302), and the other end of the support rod (303) is fixedly connected to the detection control module (1).

4. The comprehensive detection device for electric vehicle battery temperature according to claim 3, characterized in that: The thermal drive mechanism (9) includes a main airbag (901), a side airbag (902), a push rod (903), and a second magnetic block (904). The main airbag (901) is fitted inside the assembly frame (301), and one end of the main airbag (901) is fixed in the assembly frame (301). The side airbag (902) is nested inside the auxiliary frame (302), and the side airbag (902) is connected to both sides of the main airbag (901). The push rod (903) is movably fitted to the bottom of the assembly frame (301), and one end of the push rod (903) is fixedly connected to the main airbag (901). The second magnetic block (904) is fixed on the other end of the push rod (903).

5. The comprehensive detection device for electric vehicle battery temperature according to claim 4, characterized in that: The elastic support (4) includes an assembly plate (401), a magnetic sheet (402) and a spring (403). The magnetic sheet (402) is symmetrically and fixedly nested on the upper and lower surfaces of the assembly plate (401). One end of the spring (403) is fixedly connected to the magnetic sheet (402), and the other end of the spring (403) is fixedly connected to the assembly frame (301).

6. The comprehensive detection device for electric vehicle battery temperature according to claim 5, characterized in that: The gap temperature detection mechanism (5) includes a temperature sensing plate (501) and a temperature sensing wire (502). One end of the temperature sensing wire (502) is electrically connected to the temperature sensing plate (501), and the other end of the temperature sensing wire (502) is electrically connected to the detection control module (1). The temperature sensing plate (501) is fixedly nested on the front of the assembly plate (401).

7. The comprehensive detection device for electric vehicle battery temperature according to claim 6, characterized in that: The auxiliary magnetic control mechanism (6) includes an electric push rod (601) and a magnetic block (602). The free end of the electric push rod (601) is fixedly connected to the magnetic block (602). When the magnetic block (602) approaches the magnetic sheet (402), it repels and pushes the magnetic sheet (402) to move.

8. The comprehensive detection device for electric vehicle battery temperature according to claim 5, characterized in that: The detection control module (1) is provided with a ventilation component (10) on the outside, and the elastic support (4) is provided with a purge air passage (7) inside. The ventilation component (10) is used to input airflow into the purge air passage (7).

9. The comprehensive detection device for electric vehicle battery temperature according to claim 8, characterized in that: The ventilation assembly (10) includes a duct (101), a fan (102), an air duct (103), and a distribution frame (104). The duct (101) and the distribution frame (104) are both fixed on the detection control module (1). The air duct (103) is connected between the duct (101) and the distribution frame (104). The fan (102) is located in the duct (101).

10. The comprehensive detection device for electric vehicle battery temperature according to claim 9, characterized in that: The purge air passage (7) includes an internal cavity (701) and a purge port (702). The internal cavity (701) is located inside the assembly plate (401). The purge port (702) is located on the front and back surfaces of the assembly plate (401) and is connected to the internal cavity (701). One end of the assembly plate (401) is fixedly connected to a vent pipe (8). One end of the vent pipe (8) is connected to the internal cavity (701), and the other end of the vent pipe (8) is connected to the distribution frame (104).

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