Multi-layer battery module stacking and fixing structure

Abstract

The invention relates to the technical field of battery module fixing, in particular to a multilayer battery module stacking and fixing structure which comprises a shell, a partition plate is fixedly connected to the inner side wall of the shell, a plurality of battery boxes are slidably connected between the partition plate and the inner wall of the shell, and a liquid pump is fixedly connected to the side wall of the shell; a cooling mechanism is arranged at the position of the battery box and the shell, the cooling mechanism is composed of a heat conduction assembly and a circulation assembly, the heat conduction assembly comprises a plurality of hollow heat conduction plates, the heat conduction plates are fixedly connected with the battery box in a penetrating mode, the circulation assembly comprises a cold liquid cavity and a hot liquid cavity, and the cold liquid cavity and the hot liquid cavity are both formed in the shell. The cold liquid cavity, the hot liquid cavity and the heat conduction plate are all filled with cooling liquid. A temperature control mechanism is arranged at the position of the shell and composed of two over-protection assemblies and a control assembly. The fixing structure has the advantages that the fixing structure is more convenient to disassemble and assemble, and higher safety and stability are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of battery module fixing, and in particular to a multi-layer battery module stacking fixing structure. Background Art

[0002] It has been a long time since the invention of traditional cars. Traditional cars generally use gasoline or diesel as the main power source. The combustion of gasoline and diesel will produce a series of pollutants. These pollutants will seriously affect the environment after being discharged. Therefore, the development of new energy vehicles is of utmost importance to protect the environment. With the rapid development of new energy vehicles and energy storage systems, high energy density and high safety battery module design has become the core demand of the industry. In order to improve the overall capacity of the battery system, the industry generally adopts a multi-layer battery cell stacking structure. The single battery cells are integrated into the module by series / parallel connection, and the battery modules are stacked to obtain a higher overall battery capacity. The multi-layer stacked battery modules require a fixed structure to fix them in the new energy vehicle or energy storage system.

[0003] In the prior art, multi-layer battery modules are usually fixed as a whole on a fixed structure. If a single module needs to be disassembled, it is rather cumbersome and needs to be disassembled as a whole, and the heat dissipation effect on the battery is also average. At the same time, overheating protection and temperature control are generally carried out through sensors and electronic control, which have poor stability and cannot be well controlled in working conditions under extreme environments. Summary of the invention

[0004] The purpose of the present invention is to solve the problems in the prior art and to propose a multi-layer battery module stacking and fixing structure.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A multi-layer battery module stacking fixed structure comprises a shell, an inner side wall of the shell is fixedly connected to a partition, a plurality of battery boxes are slidably connected between the partition and the inner wall of the shell, and a liquid pump is fixedly connected to the side wall of the shell; The battery box and the shell are provided with a cooling mechanism, which is composed of a heat-conducting component and a circulation component. The heat-conducting component includes a plurality of hollow heat-conducting plates, which are fixedly connected to the battery box through the circulation component, and the cold liquid cavity and the hot liquid cavity are both opened in the shell, and the cold liquid cavity, the hot liquid cavity and the heat-conducting plate are all filled with cooling liquid; A temperature control mechanism is provided at the shell, and the temperature control mechanism is composed of two groups of over-protection components and one group of control components. The over-protection component includes a mounting groove, and the mounting groove is opened in the shell. A first sliding sleeve is fixedly connected between two opposite inner side walls of the mounting groove. A heat conducting plate is fixedly connected to the first sliding sleeve and the shell through it, and the first sliding sleeve is filled with a phase change liquid. The control component includes a control cavity, and the control cavity is opened in the shell.

[0006] Furthermore, the heat conducting component also includes a plurality of first tubes, and the two connected heat conducting plates are fixedly connected to the corresponding first tubes through penetration and are communicated through the first tubes, and the side walls of the two heat conducting plates on both sides on the opposite sides are respectively fixedly connected with a second tube and a third tube.

[0007] Further, the circulation component includes multiple fourth tubes and fifth tubes, the fourth tube and the fifth tube are both fixedly connected to the shell, the fifth tube extends through the hot liquid cavity, the fourth tube is fixedly connected to the output end of the liquid pump, the input end of the liquid pump is fixedly connected with an eighth tube, the eighth tube extends through the cold liquid cavity, the shell is fixedly connected with a refrigerator, the second tube is sealed and slidably sleeved with the fourth tube, the third tube is sealed and slidably sleeved with the fifth tube, the shell is fixedly connected with two sixth tubes through the shell, and the sixth tubes connect the hot liquid cavity with the cold liquid cavity.

[0008] Furthermore, the over-protection component also includes a first sliding column, which is sealingly and slidingly connected to the first sliding sleeve, one end of the first sliding column located outside the first sliding sleeve is fixedly connected to a sliding plate, and the sliding plate is sealingly and slidingly connected in the corresponding mounting groove, the side wall of the sliding plate is fixedly connected to multiple second sliding sleeves, the second sliding sleeve is slidingly sleeved with a second sliding column, a spring is fixedly connected between the second sliding column and the second sliding sleeve, one end of the second sliding column located outside the second sliding sleeve is fixedly connected to a conductive plate, two opposite side walls of the battery box are fixedly connected to side blocks, and the side walls of the side blocks are fixedly connected to conductive columns.

[0009] Furthermore, the control component also includes two seventh tubes, the seventh tubes connect the corresponding mounting grooves with the control chamber, the seventh tubes are sealingly and slidably connected with a top column, the mounting grooves and the seventh tubes are both filled with hydraulic oil, one end of the top column located outside the seventh tube is fixedly connected with an electrode sheet, the inner side wall of the control chamber is fixedly connected with a resistance coil, the electrode sheet is slidably connected to the resistance coil, and the resistance coil is electrically connected to the liquid pump through a wire.

[0010] Furthermore, two opposite side walls of the battery box are fixedly connected with fixing plates, two opposite inner side walls of the shell are fixedly connected with a plurality of blocks, and the fixing plates and the blocks are threadedly connected with fixing bolts.

[0011] Furthermore, the side walls of the second tube and the third tube are fixedly connected with sealing rubber rings.

[0012] Furthermore, the phase change liquid filled in the first sliding sleeve is n-hexane.

[0013] Furthermore, the heat conducting sheet is made of silver alloy, and the heat conducting plate is made of copper alloy.

[0014] Furthermore, solenoid valves are provided in the fourth tube and the fifth tube.

[0015] The present invention has the following advantages: 1. Multiple battery boxes slide into the shell separately and are fixed separately, so that during the maintenance process, a certain battery module can be disassembled and installed separately, making the fixing structure more convenient during the disassembly process; 2. The coolant circulates in the heat conducting plate, so that the coolant can directly enter the battery box for circulation, thereby better exchanging heat with the battery cells inside the battery module to achieve better heat dissipation effect; 3. During the installation of the battery box, the seventh tube will be inserted into the fourth tube accordingly, and the eighth tube will be inserted into the fifth tube accordingly, so that the battery box is connected to the circulation assembly. When disassembling, the circulation assembly will be automatically disconnected, so that during the disassembly and installation process, there is no need to connect and disconnect the pipeline and other structures, further improving convenience; 4. During the use of the battery, the coolant temperature is introduced into the phase change liquid in the first sliding sleeve through the heat conductive sheet. When extreme overheating occurs and may cause spontaneous combustion, the first sliding column will slide, so that the conductive plate and the conductive column are separated, and then the battery is powered off, which plays an overheating protection role and improves battery safety; 5. During the use of the battery, the sliding distances of the two top pillars will be different according to the difference in the coolant temperature in the hot liquid cavity and the coolant temperature in the cold liquid cavity, and the distance difference is the temperature difference. When the temperature difference is large, it means that the heat dissipated by the battery is small, and the coolant circulation speed will be slowed down. On the contrary, when the temperature difference is small, it means that the heat dissipated by the battery is large, and the coolant circulation speed will be accelerated. Therefore, the coolant circulation speed can be automatically controlled according to the heat dissipated by the battery; 6. The overheat protection and the control of the coolant circulation speed in the present invention are both achieved through physical means, without the assistance of sensors and electronic components, and have higher stability and can operate stably under extreme conditions, further ensuring safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the structure of the multi-layer battery module stacking and fixing structure proposed by the present invention; Figure 2This is a schematic structural diagram of the multi-layer battery module stacking and fixing structure proposed by the present invention from another perspective; Figure 3 This is a schematic diagram of the internal structure of the multi-layer battery module stacking fixed structure under the cross section proposed by the present invention; Figure 4 for Figure 3 A in the enlarged view; Figure 5 This is a schematic diagram of the internal structure of the multi-layer battery module stacking and fixing structure proposed by the present invention under another cross-section; Figure 6 A schematic diagram of the internal structure of the control cavity in the multi-layer battery module stacking and fixing structure proposed by the present invention; Figure 7 for Figure 6 The enlarged view of point B in the figure; Figure 8 This is a schematic diagram of the internal structure of the multi-layer battery module stacked fixed structure under the longitudinal section of the present invention.

[0017] In the figure: 1, shell; 2, partition; 3, battery box; 4, heat conductive plate; 5, stopper; 6, first tube; 7, second tube; 8, third tube; 9, cold liquid chamber; 10, hot liquid chamber; 11, liquid pump; 12, fourth tube; 13, fifth tube; 14, sixth tube; 15, refrigerator; 16, mounting groove; 17, first sliding sleeve; 18, heat conductive plate; 19, first sliding column; 20, sliding plate; 21, second sliding sleeve; 22, second sliding column; 23, spring; 24, conductive plate; 25, side block; 26, conductive column; 27, control chamber; 28, seventh tube; 29, top column; 30, electrode sheet; 31, resistance coil; 32, eighth tube; 33, fixing bolt; 34, fixing plate. DETAILED DESCRIPTION

[0018] Reference Figure 1-8 The multi-layer battery module stacked fixed structure includes a shell 1, the inner wall of the shell 1 is fixedly connected to a partition 2, the partition 2 is made of polyurethane material and has good insulation and flame retardant properties, a plurality of battery boxes 3 are slidably connected between the partition 2 and the inner wall of the shell 1, and a liquid pump 11 is fixedly connected to the side wall of the shell 1; A cooling mechanism is provided between the battery box 3 and the housing 1. The cooling mechanism is composed of a heat conduction component and a circulation component. The heat conduction component includes a plurality of hollow heat conduction plates 4. The heat conduction plates 4 are fixedly connected to the battery box 3. The arrangement of the heat conduction plates 4 is as follows: Figure 3 As shown, it passes between each battery cell, so as to better take away the heat inside the battery cell. The circulation component includes a cold liquid chamber 9 and a hot liquid chamber 10. The cold liquid chamber 9 and the hot liquid chamber 10 are both opened in the housing 1. The cold liquid chamber 9, the hot liquid chamber 10 and the heat conducting plate 4 are all filled with coolant. The housing 1 is provided with a temperature control mechanism, which is composed of two groups of over-protection components and one group of control components. The over-protection component includes a mounting groove 16, which is provided in the housing 1. A first sliding sleeve 17 (such as Figure 5 As shown, the first sleeve 17 and the housing 1 are connected together with a heat conducting sheet 18, and the first sleeve 17 is filled with a phase change liquid. The phase change liquid can change the percentage of gas and liquid phases according to the temperature, thereby causing the internal pressure to change. The control component includes a control chamber 27 (as shown Figure 7 As shown in FIG. 1 ), a control chamber 27 is opened in the housing 1 .

[0019] The heat-conducting component also includes a plurality of first tubes 6. The two connected heat-conducting plates 4 are fixedly connected to the corresponding first tubes 6 through penetration and are communicated through the first tubes 6. The side walls of the two heat-conducting plates 4 on the opposite sides are respectively fixedly connected with a second tube 7 and a third tube 8 through penetration. The coolant passes through each heat-conducting plate 4 through the first tubes 6, taking away the heat generated by the internal battery cells, thereby more directly dissipating the heat of the battery cells inside the battery box 3 and improving the heat dissipation effect.

[0020] The circulation assembly includes a plurality of fourth tubes 12 and fifth tubes 13, the fourth tubes 12 and the fifth tubes 13 are both fixedly connected to the shell 1, the fifth tube 13 extends through the hot liquid chamber 10, the fourth tube 12 is fixedly connected to the output end of the liquid pump 11, the input end of the liquid pump 11 is fixedly connected with the eighth tube 32, the eighth tube 32 extends through the cold liquid chamber 9, the shell 1 is fixedly connected with a refrigerator 15, the second tube 7 is sealed and slidably sleeved with the fourth tube 12, the third tube 8 is sealed and slidably sleeved with the fifth tube 13, and the shell 1 is fixedly connected with two sixth tubes 14 (such as Figure 8 As shown), the sixth tube 14 connects the hot liquid chamber 10 with the cold liquid chamber 9.

[0021] The over-protection component also includes a first slide post 19, which is sealed and slidably connected to the first slide sleeve 17, and one end of the first slide post 19 located outside the first slide sleeve 17 is fixedly connected to a sliding plate 20, and the sliding plate 20 is sealed and slidably connected in the corresponding mounting groove 16, and the side wall of the sliding plate 20 is fixedly connected to a plurality of second slide sleeves 21, and the second slide sleeve 21 is slidably sleeved with a second slide post 22, and a spring 23 is fixedly connected between the second slide post 22 and the second slide sleeve 21, and one end of the second slide post 22 located outside the second slide sleeve 21 is fixedly connected to a conductive plate 24, and the two opposite side walls of the battery box 3 are fixedly connected to side blocks 25, and the side walls of the side blocks 25 are fixedly connected to conductive columns 26, and the conductive columns 26 are connected to the inside of the battery box 3 The battery cells are connected by wires, and the conductive plate 24 is connected to the main circuit. When the conductive plate 24 contacts the conductive column 26, the battery cells in the battery box 3 are connected to the circuit. When the battery overheats and may spontaneously combust during use, the higher temperature is directly introduced into the phase change liquid of the first sleeve 17, so that the phase change liquid is quickly vaporized, and the pressure in the first sleeve 17 increases instantly, so that the sliding plate 20 slides and drives the second sleeve 21 to slide. The second sleeve 21 drives the second slide column 22 to slide through the spring 23, thereby moving the conductive plate 24 and separating from the conductive column 26, so that the battery box 3 is disconnected, avoiding the risk of spontaneous combustion during continued use, thereby greatly improving safety.

[0022] The control assembly also includes two seventh tubes 28, which connect the corresponding mounting groove 16 with the control chamber 27. The seventh tube 28 is sealed and slidably connected with a top column 29, which is made of an insulating material. The mounting groove 16 and the seventh tube 28 are filled with hydraulic oil. One end of the top column 29 located outside the seventh tube 28 is fixedly connected to an electrode sheet 30. One end of the two top columns 29 located outside the seventh tube 28 is fixedly connected to an electrode sheet 30, and there are two electrode sheets 30 in total. The inner wall of the control chamber 27 is fixedly connected to a resistance coil 31, and the electrode sheet 30 is slidably connected to the resistance coil 31. The resistance coil 31 is electrically connected to the liquid pump 11 through a wire. The longer the access length of the resistance coil 31 is, the greater the resistance of the access circuit is, which will reduce the voltage of the liquid pump 11, thereby reducing the circulation speed, and vice versa. During the liquid cooling cycle, the temperature in the hot liquid chamber 10 and the cold liquid chamber 9 will be introduced into the phase-change liquid in the corresponding first sleeve 17 through the heat conducting plate 18, and different temperatures will cause the phase-change liquid to be in different states, thereby causing the pressure in the first sleeve 17 to be different. The difference in pressure will cause the first slide column 19 to slide out of the first sleeve 17 to have different lengths, that is, the sliding distances of the sliding plate 20 are different, and the sliding plate 20 will then feed back the sliding distance to the top column 29 through the hydraulic oil. As a result, when the temperature in the hot liquid chamber 10 is different from that in the cold liquid chamber 9, the sliding distance of the top column 29 is different, and the difference in the distance is the temperature difference between the hot liquid chamber 10 and the cold liquid chamber 9. When the temperature is relatively high, it means that the heat generated by the battery cell is normal, and the temperature in the hot liquid chamber 10 does not rise much. At this time, the difference in the sliding distance of the two top columns 29 is relatively large, that is, the distance between the two electrode sheets 30 is relatively large, and the resistance value of the resistance coil 31 connected to the circuit is relatively large, thereby reducing the pumping speed of the liquid pump 11. Conversely, when the temperature is relatively low, it means that the heat generated by the battery cell is relatively large, and the temperature in the hot liquid chamber 10 rises significantly. At this time, the difference in the sliding distance of the two top columns 29 is relatively small, that is, the distance between the two electrode sheets 30 is relatively small, and the resistance value of the resistance coil 31 connected to the circuit is relatively small, thereby increasing the pumping speed of the liquid pump 11, thereby increasing the cooling speed, and then completing the automatic control of the coolant circulation speed, greatly improving the degree of automation of the structure.

[0023] It is worth mentioning that overheating protection and temperature control are both achieved through traditional physical methods, without the need to use sensors and electronic components as in the prior art, thus having higher stability. Traditional physical control can also ensure normal operation under extreme conditions (such as when high temperature may cause spontaneous combustion), further improving safety.

[0024] Solenoid valves are provided in the fourth tube 12 and the fifth tube 13. The solenoid valves are normally closed solenoid valves, which are opened when energized, and are electrically connected to the corresponding two conductive plates 24 through wires, so that when the battery box 3 is connected to the fixed structure, the solenoid valves are energized to open, and after the battery box 3 is disassembled and the conductive column 26 is separated from the conductive plate 24, the solenoid valves are energized to close, so that the battery box 3 is connected to the loop and the loop is closed when the battery box 3 is disassembled.

[0025] The two opposite side walls of the battery box 3 are fixedly connected with a fixing plate 34, and the two opposite inner side walls of the shell 1 are fixedly connected with a plurality of stoppers 5. The fixing plate 34 and the stoppers 5 are threadedly connected with fixing bolts 33. During the process of loading the battery box 3, the battery box 3 is inserted and guided by the stoppers 5 to ensure its correct insertion. During the insertion process, the third tube 8 is inserted into the fifth tube 13, and the second tube 7 is inserted into the fourth tube 12. At the same time, as the battery box 3 is inserted, the side block 25 drives the conductive column 26 to move, and the conductive column 26 will contact the conductive plate 24, so that the battery cells in the battery box 3 When connected to the main circuit, at the same time, the solenoid valves in the fourth tube 12 and the fifth tube 13 will be opened, thereby opening the circulation path. After the insertion is completed, the fixing plate 34 can be connected to the block 5 by the fixing bolts 33. When one of the battery boxes 3 needs to be removed, the fixing bolts 33 can be removed and the battery box 3 can be directly pulled out. At this time, the solenoid valves in the fourth tube 12 and the fifth tube 13 are powered off and closed, and the circulation path is automatically closed. At the same time, it will not affect the normal operation of the battery cells in other battery boxes 3, so that the fixing structure of the present invention can be individually disassembled and installed, which is more convenient to use.

[0026] The side walls of the second tube 7 and the third tube 8 are fixedly connected with sealing rubber rings. The provision of the sealing rubber rings can ensure the sealing of the insertion points after the second tube 7 and the third tube 8 are inserted into the corresponding fourth tube 12 and the fifth tube 13.

[0027] The phase change liquid filled in the first sliding sleeve 17 is n-hexane, which has a boiling point of 68.95°C, while the battery operating limit temperature is 65°C-70°C. By using n-hexane as the phase change liquid, a phase change can occur rapidly after reaching the limit temperature, triggering overheat protection.

[0028] The heat conducting sheet 18 is made of a silver alloy material, which has better thermal conductivity, thereby transferring heat to the phase change liquid more stably, thereby monitoring the temperature. The heat conducting plate 4 is made of a copper alloy material, which also has good thermal conductivity. Since the number of heat conducting plates 4 is large, the use of copper alloy can better control costs while ensuring good thermal conductivity.

[0029] In the present invention, during the process of loading the battery box 3, the battery box 3 is inserted and guided by the block 5 to ensure its correct insertion. During the insertion process, the third tube 8 is inserted into the fifth tube 13, and the second tube 7 is inserted into the fourth tube 12. At the same time, as the battery box 3 is inserted, the side block 25 drives the conductive column 26 to move, and the conductive column 26 will contact the conductive plate 24, so that the battery cells in the battery box 3 are connected to the main circuit. At the same time, the solenoid valves in the fourth tube 12 and the fifth tube 13 are opened, thereby opening the circulation path. After the insertion is completed, the fixing plate 34 is connected to the block 5 by the fixing bolts 33.

[0030] When it is necessary to disassemble one of the battery boxes 3, the fixing bolts 33 are removed and the battery box 3 is directly pulled out. At this time, the solenoid valves in the fourth tube 12 and the fifth tube 13 are powered off and closed, and the circulation path is automatically closed without affecting the normal operation of the battery cells in other battery boxes 3.

[0031] During operation, the liquid pump 11 circulates the coolant, and the coolant is cooled by the refrigerator 15 in the cold liquid chamber 9, and then enters the heat conducting plate 4 through the fourth tube 12 and the second tube 7, and passes through each heat conducting plate 4 through the first tube 6, taking away the heat generated by the internal battery cells, and then enters the hot liquid chamber 10 through the third tube 8 and the fifth tube 13, and then returns to the cold liquid chamber 9 through the sixth tube 14 for cooling, thereby realizing liquid cooling circulation to cool the battery cells.

[0032] During the liquid cooling cycle, the temperature in the hot liquid chamber 10 and the cold liquid chamber 9 will be introduced into the phase change liquid in the corresponding first sleeve 17 through the heat conductive sheet 18, and different temperatures will cause the phase change liquid to be in different states, thereby causing the pressure in the first sleeve 17 to be different, and the difference in pressure will cause the first slide column 19 to slide out of the first sleeve 17 at different lengths, that is, the sliding distances of the sliding plate 20 are different, and the sliding plate 20 then feeds back the sliding distance to the top column 29 through the hydraulic oil, thereby causing the temperature in the hot liquid chamber 10 and the cold liquid chamber 9 to be different, causing the sliding distances of the top column 29 to be different, and the difference in the distance is the temperature difference between the hot liquid chamber 10 and the cold liquid chamber 9, and when the temperature is relatively large, it means that the heat generated by the battery cell is average, and the temperature in the hot liquid chamber 10 has not increased much. At this time, the difference in the sliding distances of the two top columns 29 is relatively large, that is, the distance between the two electrode sheets 30 is relatively large, and the resistance value of the resistance coil 31 connected to the circuit is relatively large, thereby reducing the pumping speed of the liquid pump 11.

[0033] On the contrary, when the temperature is relatively low, it means that the heat generated by the battery cell is relatively high, causing the temperature in the hot liquid chamber 10 to rise significantly. At this time, the difference in the sliding distance of the two top pillars 29 is relatively small, that is, the distance between the two electrode sheets 30 is relatively small. At this time, the resistance value of the resistance coil 31 connected to the circuit is relatively small, thereby increasing the pumping speed of the liquid pump 11, thereby increasing the cooling speed, and then completing the automatic control of the coolant circulation speed.

[0034] When the battery overheats and may spontaneously combust during use, the higher temperature is directly introduced into the phase change liquid of the first sleeve 17, causing the phase change liquid to vaporize rapidly. The pressure in the first sleeve 17 increases instantly, causing the sliding plate 20 to slide and drive the second sleeve 21 to slide. The second sleeve 21 drives the second sliding column 22 to slide through the spring 23, thereby moving the conductive plate 24 and separating it from the conductive column 26, thereby disconnecting the battery box 3 to avoid the risk of spontaneous combustion during continued use.

Claims

1. A multi-layer battery module stacking and fixing structure, comprising a housing (1), characterized in that: A partition plate (2) is fixedly connected to the inner wall of the shell (1); a plurality of battery boxes (3) are slidably connected between the partition plate (2) and the inner wall of the shell (1); and a liquid pump (11) is fixedly connected to the side wall of the shell (1); A cooling mechanism is provided at the battery box (3) and the shell (1), the cooling mechanism being composed of a heat conduction component and a circulation component, the heat conduction component comprising a plurality of hollow heat conduction plates (4), the heat conduction plates (4) and the battery box (3) being fixedly connected thereto through the heat conduction plates, the circulation component comprising a cold liquid chamber (9) and a hot liquid chamber (10), the cold liquid chamber (9) and the hot liquid chamber (10) being both provided in the shell (1), the cold liquid chamber (9), the hot liquid chamber (10) and the heat conduction plates (4) being all filled with cooling liquid; The shell (1) is provided with a temperature control mechanism, the temperature control mechanism is composed of two groups of over-protection components and one group of control components, the over-protection component comprises a mounting groove (16), the mounting groove (16) is arranged in the shell (1), a first sliding sleeve (17) is fixedly connected between two opposite inner side walls of the mounting groove (16), a heat conducting sheet (18) is fixedly connected to the first sliding sleeve (17) and the shell (1), the first sliding sleeve (17) and the shell (1) are penetrated and fixedly connected, the first sliding sleeve (17) is filled with a phase change liquid, and the control component comprises a control chamber (27), the control chamber (27) is arranged in the shell (1).

2. The multi-layer battery module stacking and fixing structure according to claim 1, characterized in that: The heat conduction assembly further comprises a plurality of first tubes (6), and the two connected heat conduction plates (4) are both penetrated and fixedly connected to the corresponding first tubes (6), and are communicated through the first tubes (6); and the side walls of the two heat conduction plates (4) on the two sides, which are on opposite sides, are respectively penetrated and fixedly connected to a second tube (7) and a third tube (8).

3. The multi-layer battery module stacking and fixing structure according to claim 2, characterized in that: The circulation component comprises a plurality of fourth tubes (12) and fifth tubes (13), the fourth tubes (12) and fifth tubes (13) are both fixedly connected to the shell (1), the fifth tube (13) extends through the hot liquid chamber (10), the fourth tube (12) is fixedly connected to the output end of the liquid pump (11), the input end of the liquid pump (11) is fixedly connected to an eighth tube (32), the eighth tube (32) extends through the cold liquid chamber (9), the shell (1) is fixedly connected to a refrigerator (15), the second tube (7) is sealingly and slidably sleeved with the fourth tube (12), the third tube (8) is sealingly and slidably sleeved with the fifth tube (13), and two sixth tubes (14) are fixedly connected to the shell (1), the sixth tubes (14) connect the hot liquid chamber (10) with the cold liquid chamber (9).

4. The multi-layer battery module stacking and fixing structure according to claim 1, characterized in that: The over-protection component further comprises a first sliding column (19), the first sliding column (19) being sealingly and slidably connected to the first sliding sleeve (17), one end of the first sliding column (19) located outside the first sliding sleeve (17) being fixedly connected to a sliding plate (20), the sliding plate (20) being sealingly and slidably connected in the corresponding mounting groove (16), a plurality of second sliding sleeves (21) being fixedly connected to the side wall of the sliding plate (20), the second sliding sleeves (21) being slidably connected to a second sliding column (22), a spring (23) being fixedly connected between the second sliding column (22) and the second sliding sleeve (21), one end of the second sliding column (22) located outside the second sliding sleeve (21) being fixedly connected to a conductive plate (24), two opposite side walls of the battery box (3) being fixedly connected to side blocks (25), and the side walls of the side blocks (25) being fixedly connected to conductive columns (26).

5. The multi-layer battery module stacking and fixing structure according to claim 1, characterized in that: The control assembly further comprises two seventh tubes (28), the seventh tubes (28) connecting the corresponding mounting grooves (16) with the control chamber (27), the seventh tubes (28) being sealingly and slidably connected to a top column (29), the mounting grooves (16) and the seventh tubes (28) being filled with hydraulic oil, an end of the top column (29) located outside the seventh tube (28) being fixedly connected to an electrode sheet (30), an inner side wall of the control chamber (27) being fixedly connected to a resistance coil (31), the electrode sheet (30) being slidably connected to the resistance coil (31), and the resistance coil (31) being electrically connected to the liquid pump (11) via a wire.

6. The multi-layer battery module stacking and fixing structure according to claim 1, characterized in that: Two opposite side walls of the battery box (3) are fixedly connected with a fixing plate (34), two opposite inner side walls of the housing (1) are fixedly connected with a plurality of stoppers (5), and the fixing plate (34) and the stoppers (5) are threadedly connected with fixing bolts (33).

7. The multi-layer battery module stacking and fixing structure according to claim 3, characterized in that: The side walls of the second tube (7) and the third tube (8) are both fixedly connected with sealing rubber rings.

8. The multi-layer battery module stacking and fixing structure according to claim 1, characterized in that: The phase change liquid filled in the first sliding sleeve (17) is n-hexane.

9. The multi-layer battery module stacking and fixing structure according to claim 1, characterized in that: The heat conducting sheet (18) is made of a silver alloy material, and the heat conducting plate (4) is made of a copper alloy material.

10. The multi-layer battery module stacking and fixing structure according to claim 3, characterized in that: Solenoid valves are provided in the fourth tube (12) and the fifth tube (13).

Images