Long-endurance battery module for low-speed vehicle

Abstract

The invention discloses a long-endurance battery module for a low-speed vehicle, and relates to the technical field of battery modules. Comprising a liquid cooling mechanism, the liquid cooling mechanism comprises a square liquid cooling frame, and a liquid cooling block is arranged in the square liquid cooling frame. The battery units in the adjacent mounting positions are mutually inverted, so that the overall cooling efficiency is improved, and the risk of local overheating of the battery units due to non-uniform cooling can be reduced through the inverted mounting mode, so that the service life of the battery is prolonged; the cooling liquid in the contact surface of the same section of liquid cooling block used by the two battery units can be quickly and uniformly cooled, the thermal runaway phenomenon of temperature runaway can be conveniently dealt with, and the battery units in a single area or multiple areas can be emphatically cooled according to the use requirements through the arranged air inlet mechanism, so that the use efficiency is improved. Through the arranged expansion detection mechanism, whether the battery unit expands can be detected, and the safety performance of the battery module can be ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of battery modules, and in particular to a long-range battery module for low-speed vehicles. Background Art

[0002] Low-speed vehicles usually refer to electric vehicles with a low design speed and suitable for short-distance travel. The maximum speed of such vehicles is generally between 20 and 45 kilometers per hour, which is suitable for urban commuting, campuses, tourist attractions and short-distance transportation. The battery module is usually a structural unit composed of multiple battery cells. The long battery life is also related to its charge and discharge cycle life. Within the appropriate temperature range, the battery life and performance are optimal, and extreme temperatures will accelerate the battery's degradation and reduce the effective capacity, thereby affecting the battery life. At the same time, there may be safety hazards under the influence of extreme temperatures.

[0003] The battery module and the battery including the battery module with patent publication number CN115191054A include a plurality of battery cells stacked on each other; a module frame for accommodating the battery cell stack; an end plate covering the front and rear surfaces of the battery cell stack and coupled to the module frame; a radiator located below the bottom of the module frame; and at least two cooling ports connected to the radiator to supply refrigerant to the radiator. The end plate includes: a first mounting portion located between a side end portion of the end plate and a cooling port adjacent to the side end portion of at least two cooling ports, and extending in a protruding direction of an electrode lead protruding from the battery cell; and a second mounting portion located between two adjacent cooling ports of the at least two cooling ports, and extending in a protruding direction of the electrode lead protruding from the battery cell.

[0004] The above-mentioned battery module solves the heat dissipation problem by adding a radiator, but the heat dissipation effect of the radiator is not ideal, and the battery cells cannot be cooled evenly and comprehensively. At the same time, it is not convenient to quickly resolve or reduce the hazards caused by the risk of thermal runaway of the battery cells in the battery module. In the prior art, liquid cooling plates are often attached to the battery cells at both ends to dissipate heat for the battery cells. Since the temperatures generated at the top and bottom of the battery cells are different during operation, this heat dissipation method will result in uneven heat dissipation of a single battery cell, which is not conducive to uniform heat dissipation of the battery cells. At the same time, it is not convenient to focus on temperature regulation of a certain area according to needs. Therefore, the present invention is proposed. Summary of the invention

[0005] The object of the present invention is to provide a long-range battery module for a low-speed vehicle to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a long-range battery module for a low-speed vehicle, comprising a liquid cooling mechanism, the liquid cooling mechanism comprising a square liquid cooling frame, a liquid cooling block is arranged inside the square liquid cooling frame, a plurality of mounting positions and air cooling grooves are provided on the liquid cooling block, a spacing channel is provided between the horizontally adjacent mounting positions, the air cooling grooves are all located between the vertically adjacent spacing channels, the liquid cooling block is a hollow structure, connecting pipes are installed on the top and bottom between the square liquid cooling frame and the liquid cooling block, a liquid pump is installed on the connecting pipe, and the square liquid cooling frame and the liquid cooling block form a liquid circulation circuit through the connecting pipe and the liquid pump. , battery cells are installed in the installation positions, and the battery cells in adjacent installation positions are inverted with each other. An air intake mechanism for blowing air to the spacing channels and air cooling grooves on the liquid cooling block is provided at the bottom of the liquid cooling mechanism. A plurality of through grooves penetrating the transversely adjacent air cooling grooves are provided on the outer walls at both ends of the liquid cooling block. Exhaust grooves corresponding to the through grooves are provided on the outer walls at both ends of the square liquid cooling frame. A cooling mechanism for quickly cooling the cooling liquid in the contact surfaces of the vertically adjacent battery cells is installed in the through groove, and an expansion detection mechanism for detecting whether the battery cell undergoes expansion deformation is installed in the spacing channels.

[0007] Furthermore, the expansion detection mechanism includes a fixed frame installed in the spacing channel, both ends of the fixed frame are in contact with the outer walls of the laterally adjacent battery cells, fixing columns are installed on the inner walls on both sides of the fixed frame, horizontal columns are installed between the fixed columns, second contacts are installed on the outer walls at both ends of the horizontal columns, and first contacts are embedded and installed at the inner walls of the fixed frame corresponding to the second contacts. An electrical signal is sent out based on whether the first contact is in contact with the second contact to determine whether the battery cell has undergone expansion deformation.

[0008] Furthermore, the temperature reduction cooling mechanism includes a cooling pipe installed in the through groove and a cylinder installed at the exhaust pipe port of the cooling pipe, an air pump is installed at the air inlet pipe port of the cooling pipe, the air inlet pipe port of the cooling pipe is located in the air cooling groove, the exhaust pipe port of the cooling pipe faces the outside of the liquid cooling block, a limit ring and a movable limit seat are installed on the inner wall of the cooling pipe near the air inlet pipe port, a plurality of movable cooling beads are placed inside the cooling pipe between the limit ring and the limit seat, a spring is fixedly connected to the outer wall of the limit seat, the other end of the spring is fixedly connected to a mounting plate installed in the exhaust groove, and slot blocks for limiting ventilation are installed on the top and bottom of the inner wall of the cylinder.

[0009] Furthermore, the outer wall of the cooling bead is made of high thermal conductivity metal, the interior of the cooling bead is filled with phase change material, the middle of the outer wall of the cooling tube is rotatably connected to a ring located in the air cooling groove, and a plurality of fan blades are installed on the outer wall of the ring.

[0010] Furthermore, an upper connecting plate and a lower connecting plate are respectively installed on the top and bottom of the battery cell, and the connection of the battery cell is completed by the cooperation of the upper connecting plate and the lower connecting plate. A support frame is installed on the four corners of the inner wall of the square liquid cooling frame, and a top plate and a bottom plate are respectively installed on the top and bottom of the support frame. A connecting end electrically connected to the upper connecting plate and the lower connecting plate is installed on the top plate, and a vertical groove corresponding to the air cooling groove and the spacing channel is opened on the bottom outer wall of the bottom plate, which passes through the upper connecting plate, the lower connecting plate, the bottom plate and the top plate.

[0011] Furthermore, the air intake mechanism includes an air intake box installed on the outer wall at the bottom of the base plate, a plurality of partitions are installed in the air intake box, and the air cooling groove and the partition channel are divided into multiple areas by the plurality of partitions. Ventilation pipes corresponding to the areas are installed on the outer walls at both ends of the air intake box, valves are installed on the outer walls of the ventilation pipes, and an air collecting pipe connected to the ventilation pipes is installed on the air intake box.

[0012] Furthermore, a plurality of heat dissipation fins are installed on the outer wall of the square liquid cooling frame, and the heat dissipation fins are "T"-shaped. An "H"-shaped structure is formed by a plurality of "T"-shaped heat dissipation fins and the square liquid cooling frame, thereby improving the anti-collision and anti-extrusion capabilities of the square liquid cooling frame.

[0013] Furthermore, an aluminum alloy ring is installed on the outer wall of the battery unit, positioning grooves are opened on the four borders of the top outer wall of the top plate, and positioning columns adapted to the positioning grooves are installed on the four borders of the bottom outer wall of the bottom plate.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The long-range battery module for low-speed vehicles improves the overall cooling efficiency by inverting the battery cells in adjacent installation positions. The inverted installation method can reduce the risk of local overheating of the battery cells due to uneven cooling, thereby extending the service life of the battery. Through the provided cooling mechanism, the two battery cells can be quickly and evenly cooled using the cooling liquid in the same section of the liquid cooling block contact surface, which is beneficial to improving the heat dissipation efficiency and facilitating the response to the thermal runaway phenomenon of temperature runaway. Through the provided air intake mechanism, the battery cells in a single area or multiple areas can be emphatically cooled according to the use requirements, which is beneficial to improving the heat dissipation efficiency. Through the provided expansion detection mechanism, it can be detected whether the battery cells have expanded, which is beneficial to ensuring the safety performance of the battery module.

[0016] At the same time, electric heating wires can be added to the square liquid cooling frame and the air intake mechanism, so that the square liquid cooling frame can adjust the temperature of the cooling liquid and the air intake mechanism can adjust the temperature of the blown air, thereby controlling the temperature of the battery unit. The heat-absorbing cooling beads in the cooling mechanism use high thermal conductivity metal as the shell and are filled with phase change material inside, which can improve the thermal conductivity effect. The circular ring cooperates with the fan blades, so that when the air intake mechanism is started, it can rotate under the influence of the airflow, thereby increasing the contact area between the airflow and part of the inner wall of the air cooling groove, which is beneficial to increase the contact area and improve the heat exchange efficiency.

[0017] At the same time, by setting up a number of heat dissipation fins, the contact area between the cooling liquid and the outside world can be increased, the heat exchange efficiency can be improved, and the heat dissipation of the cooling liquid in the square liquid cooling frame can be accelerated. The T-shaped design can form an H-shaped structure with the square liquid cooling frame, which can fully improve the anti-collision and anti-extrusion capabilities of the square liquid cooling frame, which is beneficial to protecting the battery unit. The aluminum alloy ring that is set can help to quickly conduct heat from the battery unit, and the surface-treated aluminum alloy ring can increase the corrosion resistance of the battery unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the top structure of the upper connecting plate of the present invention;

[0020] Figure 3 This is a schematic diagram of the bottom structure of the lower connecting plate of the present invention;

[0021] Figure 4 It is a schematic diagram of the structure of the liquid cooling mechanism of the present invention;

[0022] Figure 5 It is a schematic diagram of the structure of the liquid cooling block of the present invention;

[0023] Figure 6 It is a schematic diagram of the through slot structure of the present invention;

[0024] Figure 7 It is a schematic diagram of the structure of the air intake mechanism of the present invention;

[0025] Figure 8 It is a schematic cross-sectional structure diagram of the expansion detection mechanism of the present invention;

[0026] Fig. 9 It is a schematic diagram of the enlarged structure of point A of the present invention;

[0027] Fig.10 It is a schematic cross-sectional structural diagram of the temperature reduction and cooling mechanism of the present invention;

[0028] Fig.11 It is a schematic diagram of the structure of the aluminum alloy ring of the present invention.

[0029] In the figure: 1. Liquid cooling mechanism; 101. Square liquid cooling frame; 102. Heat dissipation fins; 103. Liquid cooling block; 104. Mounting position; 105. Air cooling slot; 106. Liquid pump; 107. Connecting pipe; 108. Through slot; 109. Exhaust slot; 2. Upper connecting plate; 3. Top plate; 4. Connecting end; 5. Battery unit; 6. Expansion detection mechanism; 601. Fixed frame; 602. Fixed column; 603. Horizontal column; 604. First contact point; 605. Second contact point; 7. Cooling mechanism; 701. Cold Cooling tube; 702, vacuum pump; 703, limit ring; 704, cooling bead; 705, limit seat; 706, spring; 707, ring; 708, fan blade; 709, cylinder; 710, placement slot block; 711, mounting plate; 8, air intake mechanism; 801, air intake box; 802, ventilation pipe; 803, valve; 804, air collecting pipe; 805, partition; 9, support frame; 10, bottom plate; 11, lower connecting plate; 12, positioning groove; 13, vertical groove; 14, positioning column; 15, aluminum alloy ring. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] The long battery life of a battery is closely related to its operating temperature. A suitable operating temperature can improve battery life, while extreme temperatures can have a negative impact on battery performance. Therefore, maintaining the battery within an ideal temperature range is key to ensuring its efficient operation and extended service life. When the battery module is in use, the air collector needs to be connected to the fan for normal operation of air cooling. At the same time, a battery management system is added to monitor the temperature of the battery cell, etc., to facilitate the normal operation of the battery module.

[0032] like Figure 1-Figure 11As shown, the present invention provides a technical solution: a long-range battery module for a low-speed vehicle, comprising a liquid cooling mechanism 1, the liquid cooling mechanism 1 comprising a square liquid cooling frame 101, a liquid cooling block 103 is arranged inside the square liquid cooling frame 101, a plurality of mounting positions 104 and air cooling grooves 105 are provided on the liquid cooling block 103, a spacing channel is provided between the horizontally adjacent mounting positions 104, the air cooling grooves 105 are all located between the vertically adjacent spacing channels, the liquid cooling block 103 is a hollow structure, a connecting pipe 107 is installed on the top and bottom between the square liquid cooling frame 101 and the liquid cooling block 103, a liquid pump 106 is installed on the connecting pipe 107, and the square liquid cooling frame 101 and the liquid cooling block 103 are connected by the connecting pipe 107 and the liquid pump 106. A liquid circulation loop is formed, a battery cell 5 is installed in the installation position 104, and the battery cells 5 in adjacent installation positions 104 are inverted with each other. An air intake mechanism 8 for blowing air to the spacing channels and air cooling grooves 105 on the liquid cooling block 103 is arranged at the bottom of the liquid cooling mechanism 1, and a plurality of through grooves 108 penetrating the laterally adjacent air cooling grooves 105 are opened on the outer walls at both ends of the liquid cooling block 103. Exhaust grooves 109 corresponding to the through grooves 108 are opened on the outer walls at both ends of the square liquid cooling frame 101. A cooling mechanism 7 for quickly cooling the cooling liquid in the contact surface of the vertically adjacent battery cells 5 is installed in the through groove 108, and an expansion detection mechanism 6 for detecting whether the battery cell 5 undergoes expansion deformation is installed in the spacing channels.

[0033] It should be noted that the battery cells 5 are separated by the set intervals to avoid the risk of short circuit caused by mutual contact between the battery cells 5, which is beneficial to improving the stability of the battery module. The set installation position 104 is used to place and install the battery cell 5. At the same time, the cooling liquid flowing in the liquid cooling block 103 can dissipate heat for the battery cell 5. The square liquid cooling frame 101 can form a liquid circuit for cooling liquid. At the same time, the square liquid cooling frame 101 surrounds the liquid cooling block 103, which is beneficial to protecting the battery cells 5. By starting the liquid pumps 106 on the multiple connecting pipes 107, the cooling liquid in the liquid cooling block 103 can be pumped into the square liquid cooling frame 101, and the cooling liquid in the square liquid cooling frame 101 can be pumped into the liquid cooling block 103. The battery cells 5 in the adjacent installation positions 104 are inverted with each other. Through the inverted installation, the cooling liquid can be better evenly distributed through the inner wall of the liquid cooling block 103 and the battery cells 5. Contact, avoid uneven cooling caused by unit arrangement, improve overall cooling efficiency, the inverted installation method can reduce the risk of local overheating of the battery unit 5 due to uneven cooling, thereby extending the service life of the battery, and the air intake mechanism 8 is provided to blow air to the spacing channel and the air cooling groove 105, which is beneficial to fully improve the heat dissipation efficiency. At the same time, when adjusting the temperature, electric heating wires can be added to the square liquid cooling frame 101 and the air intake mechanism 8, so that the square liquid cooling frame 101 adjusts the temperature of the cooling liquid and the air intake mechanism 8 adjusts the temperature of the blown air, thereby controlling the temperature of the battery unit 5, and the cooling mechanism 7 is provided to quickly and evenly cool the cooling liquid in the contact surface of the vertically adjacent battery units 5, which is beneficial to improve the heat dissipation efficiency and facilitate the response to the thermal runaway phenomenon of temperature runaway, and the expansion detection mechanism 6 is provided to detect whether the battery unit 5 has expanded, which is beneficial to ensure the safety performance of the battery module.

[0034] like Figure 8 and Fig. 9 As shown, the expansion detection mechanism 6 includes a fixed frame 601 installed in the spacing channel, both ends of the fixed frame 601 are in contact with the outer walls of the laterally adjacent battery cells 5, both inner walls of the fixed frame 601 are installed with fixed columns 602, a horizontal column 603 is installed between the fixed columns 602, and both end outer walls of the horizontal column 603 are installed with second contacts 605, and the inner wall of the fixed frame 601 and the corresponding position of the second contact 605 are embedded with a first contact 604, and an electrical signal is sent according to whether the first contact 604 and the second contact 605 are in contact to determine whether the battery cell 5 has expanded and deformed.

[0035] It should be noted that the first contact 604 and the second contact 605 are connected to the battery management system. When the first contact 604 and the second contact 605 are in contact and an electrical signal is generated, the signal is fed back to the battery management system, and then fed back to the user by the battery management system, thereby improving the safety of the battery module. The fixed frame 601 is a rectangle with depressions at both ends, and fits with the battery cell 5 through the depressions at both ends. When the battery cell 5 at one end of the fixed frame 601 expands and deforms, pressure is applied to one end of the fixed frame 601 to cause deformation, thereby causing the second contact 605 to contact the first contact 604 and generate an electrical signal. By setting the fixed frame 601 in conjunction with the mounting position 104, the position of the battery cell 5 can be fully fixed.

[0036] like Figure 5 , Figure 6 and Fig.10 As shown, the cooling mechanism 7 includes a cooling tube 701 installed in the through groove 108 and a cylinder 709 installed at the exhaust pipe opening of the cooling tube 701. An air pump 702 is installed at the air inlet pipe opening of the cooling tube 701. The air inlet pipe opening of the cooling tube 701 is located in the air cooling groove 105. The exhaust pipe opening of the cooling tube 701 faces the outside of the liquid cooling block 103. A limiting ring 703 and a movable limiting seat 705 are installed on the inner wall of the cooling tube 701 near the air inlet pipe opening. A plurality of limiting rings 703 and the limiting seat 705 are placed inside the cooling tube 701. A movable cooling bead 704 is fixedly connected to the outer wall of a limiting seat 705 with a spring 706, the other end of the spring 706 is fixedly connected to a mounting plate 711 installed in the exhaust slot 109, and a placement slot block 710 for limiting ventilation is installed at the top and bottom of the inner wall of the cylinder 709; the outer wall of the cooling bead 704 is made of a high thermal conductivity metal, the interior of the cooling bead 704 is filled with a phase change material, the middle part of the outer wall of the cooling tube 701 is rotatably connected to a ring 707 located in the air cooling slot 105, and a number of fan blades 708 are installed on the outer wall of the ring 707.

[0037] It should be noted that there are multiple cooling mechanisms 7. The function of the cooling mechanism 7 is to cool the liquid cooling block 103 segment that contacts the outer walls of the two battery cells 5 for heat dissipation. When heat dissipation and cooling are required, the air pump 702 is started to extract air to squeeze the limiting ring 703, the cooling ball 704, the limiting seat 705 and the spring 706, and the limiting ring 703, the cooling ball 704, the limiting seat 705 and the spring 706 are squeezed to move them. Through the action of the cooling ball 704, the heat of the cooling liquid in the liquid cooling block 103 conducted by the cooling tube 701 can be fully absorbed, so that the temperature of the cooling liquid is rapidly reduced, which is beneficial to quickly cool down the battery cell 5 and to cope with sudden thermal runaway of the battery cell 5. At the same time, the wind blows the ball bearings to increase the contact area between the ball bearings and the coolant, thereby improving the heat exchange efficiency. When the cooling ball 704 is cooled, the cooling ball 704 can be prevented from continuing to move by moving the cooling ball 704 to the placement slot block 710. At the same time, the cooling ball 704 is cooled by the wind. The air pump 702 is turned off after the temperature is lowered and cooled. The limit ring 703, the cooling bead 704 and the limit seat 705 are reset by the action of the spring 706. The air pump 702 is turned on again to perform the next rapid cooling and heat dissipation. The high thermal conductivity metal can be copper, etc., which is determined according to the actual use requirements. The material with appropriate phase change temperature (such as paraffin, brine, etc.) is selected to ensure efficient heat exchange within the required working temperature range. The circular ring 707 cooperates with the fan blade 708 to rotate under the influence of the air flow when the air intake mechanism 8 is started, thereby increasing the contact area between the air flow and the inner wall of part of the air cooling groove 105, which is beneficial to increase the contact area and improve the heat exchange efficiency. By controlling the opening and closing of the air pump 702 on the cooling pipe 701, it can be controlled whether to perform rapid cooling and heat dissipation. During specific use, a temperature threshold can be designed. When the temperature threshold is reached, the air pump 702 automatically starts and stops to perform rapid cooling and heat dissipation, which is convenient for coping with sudden thermal runaway and is beneficial to reducing losses.

[0038] like Figure 1 As shown, the top and bottom of the battery unit 5 are respectively installed with an upper connecting plate 2 and a lower connecting plate 11, and the connection of the battery unit 5 is completed by the cooperation of the upper connecting plate 2 and the lower connecting plate 11. The four corners of the inner wall of the square liquid cooling frame 101 are installed with a support frame 9, and the top and bottom of the support frame 9 are respectively installed with a top plate 3 and a bottom plate 10. The top plate 3 is installed with a connecting end 4 electrically connected to the upper connecting plate 2 and the lower connecting plate 11, and a vertical groove 13 corresponding to the air cooling groove 105 and the spacing channel is opened on the bottom outer wall of the bottom plate 10, which passes through the upper connecting plate 2, the lower connecting plate 11, the bottom plate 10 and the top plate 3.

[0039] It should be noted that connectors are integrated in the upper connecting plate 2 and the lower connecting plate 11 for connecting several battery cells 5 in the liquid cooling block 103 in series, parallel or mixed connection, and the air circulation of the air intake mechanism 8 can be facilitated through the vertical grooves 13 passing through.

[0040] like Figure 7 As shown, the air intake mechanism 8 includes an air intake box 801 installed on the bottom outer wall of the base plate 10, and a plurality of partitions 805 are installed in the air intake box 801. The air cooling groove 105 and the spacing channel are divided into a plurality of areas by the plurality of partitions 805. Ventilation pipes 802 corresponding to the areas are installed on the outer walls at both ends of the air intake box 801, and valves 803 are installed on the outer walls of the ventilation pipes 802. An air collecting pipe 804 connected to the ventilation pipes 802 is installed on the air intake box 801.

[0041] It should be noted that the interior of the air intake box 801 is divided into multiple areas by the partition 805 in the air intake box 801, each area corresponds to a horizontal vertical groove 13, and then corresponds to a horizontal air cooling groove 105 or a spacing channel. By opening and closing the partition 805 in coordination with the valve 803, the battery cells 5 in a single area or multiple areas can be cooled or the temperature adjusted according to the use requirements, which is convenient for use. When temperature adjustment is required, the air collecting pipe 804 needs to be connected to the external fan.

[0042] like Figure 2 As shown, a plurality of heat sink fins 102 are installed on the outer wall of the square liquid cooling frame 101. The heat sink fins 102 are "T"-shaped. An "H"-shaped structure is formed by a plurality of "T"-shaped heat sink fins 102 and the square liquid cooling frame 101, thereby improving the anti-collision and anti-extrusion capabilities of the square liquid cooling frame 101.

[0043] It should be noted that by setting up a number of heat dissipation fins 102, the contact area between the cooling liquid and the outside world can be increased, the heat exchange efficiency can be improved, and the heat dissipation of the cooling liquid in the square liquid cooling frame 101 can be accelerated. Moreover, through the T-shaped design, an H-shaped structure can be formed with the square liquid cooling frame 101, thereby fully improving the anti-collision and anti-extrusion capabilities of the square liquid cooling frame 101, which is beneficial to protecting the battery unit 5.

[0044] like Figure 2 , Figure 3 and Fig.11 As shown, an aluminum alloy ring 15 is installed on the outer wall of the battery unit 5, positioning grooves 12 are opened on the four boundaries of the top outer wall of the top plate 3, and positioning columns 14 adapted to the positioning grooves 12 are installed on the four boundaries of the bottom outer wall of the bottom plate 10.

[0045] It should be noted that the aluminum alloy ring 15 can help to quickly conduct heat from the battery cell 5. At the same time, aluminum alloy is relatively light, which helps to reduce the overall weight. The surface-treated aluminum alloy ring can increase the corrosion resistance of the battery cell 5. The positioning groove 12 and positioning column 14 can facilitate the stacking and fixing of multiple battery modules that do not have an air intake mechanism 8.

[0046] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is limited by the attached embodiments and their equivalents.

Claims

1. A long-range battery module for a low-speed vehicle, comprising a liquid cooling mechanism (1), characterized in that: The liquid cooling mechanism (1) comprises a square liquid cooling frame (101), a liquid cooling block (103) is arranged inside the square liquid cooling frame (101), a plurality of mounting positions (104) and air cooling grooves (105) are provided on the liquid cooling block (103), a spacing channel is provided between the horizontally adjacent mounting positions (104), the air cooling grooves (105) are all located between the vertically adjacent spacing channels, the liquid cooling block (103) is a hollow structure, a connecting pipe (107) is installed on the top and bottom between the square liquid cooling frame (101) and the liquid cooling block (103), a liquid pump (106) is installed on the connecting pipe (107), the square liquid cooling frame (101) and the liquid cooling block (103) form a liquid circulation circuit through the connecting pipe (107) and the liquid pump (106), and a liquid pump (106) is installed in the mounting position (104). A battery unit (5) is provided, wherein the battery units (5) in adjacent installation positions (104) are inverted with each other, an air intake mechanism (8) for blowing air to the spacing channel and the air cooling groove (105) on the liquid cooling block (103) is provided at the bottom of the liquid cooling mechanism (1), a plurality of through grooves (108) penetrating the transversely adjacent air cooling grooves (105) are provided on the outer walls at both ends of the liquid cooling block (103), exhaust grooves (109) corresponding to the through grooves (108) are provided on the outer walls at both ends of the square liquid cooling frame (101), a cooling mechanism (7) for quickly cooling the cooling liquid in the contact surface of the vertically adjacent battery units (5) is installed in the through groove (108), and an expansion detection mechanism (6) for detecting whether the battery unit (5) has undergone expansion deformation is installed in the spacing channel.

2. The long-endurance battery module for a low-speed vehicle according to claim 1, characterized in that: The expansion detection mechanism (6) comprises a fixed frame (601) installed in the spacer, the two ends of the fixed frame (601) are in contact with the outer wall of the laterally adjacent battery unit (5), the inner walls on both sides of the fixed frame (601) are both installed with fixed columns (602), a horizontal column (603) is installed between the fixed columns (602), the outer walls at both ends of the horizontal column (603) are both installed with second contacts (605), the inner wall of the fixed frame (601) and the corresponding position of the second contact (605) are both embedded with a first contact (604), and an electrical signal is sent according to whether the first contact (604) and the second contact (605) are in contact to determine whether the battery unit (5) has expanded and deformed.

3. The long-endurance battery module for a low-speed vehicle according to claim 1, characterized in that: The temperature reduction cooling mechanism (7) comprises a cooling pipe (701) installed in the through groove (108) and a cylinder (709) installed at the exhaust pipe opening of the cooling pipe (701); an air pump (702) is installed at the air inlet pipe opening of the cooling pipe (701); the air inlet pipe opening of the cooling pipe (701) is located in the air cooling groove (105); the exhaust pipe opening of the cooling pipe (701) faces the outside of the liquid cooling block (103); a limit ring (703) is installed on the inner wall of the cooling pipe (701) near the air inlet pipe opening ) and a movable limiting seat (705), a plurality of movable cooling beads (704) are placed inside the cooling tube (701) between the limiting ring (703) and the limiting seat (705), a spring (706) is fixedly connected to the outer wall of the limiting seat (705), the other end of the spring (706) is fixedly connected to a mounting plate (711) installed in the exhaust slot (109), and a placement slot block (710) for limiting ventilation is installed on the top and bottom of the inner wall of the cylinder (709).

4. The long-endurance battery module for a low-speed vehicle according to claim 3, characterized in that: The outer wall of the cooling bead (704) is made of a high thermal conductivity metal, the interior of the cooling bead (704) is filled with a phase change material, and a ring (707) is rotatably connected to the middle of the outer wall of the cooling tube (701) in the air cooling groove (105), and a plurality of fan blades (708) are installed on the outer wall of the ring (707).

5. The long-endurance battery module for a low-speed vehicle according to claim 1, characterized in that: The top and bottom of the battery unit (5) are respectively installed with an upper connecting plate (2) and a lower connecting plate (11), and the connection of the battery unit (5) is completed by the cooperation of the upper connecting plate (2) and the lower connecting plate (11). The four corners of the inner wall of the square liquid cooling frame (101) are installed with a support frame (9), and the top and bottom of the support frame (9) are respectively installed with a top plate (3) and a bottom plate (10). The top plate (3) is installed with a connecting end (4) electrically connected to the upper connecting plate (2) and the lower connecting plate (11), and the bottom outer wall of the bottom plate (10) is provided with a vertical groove (13) corresponding to the air cooling groove (105) and the spacing channel, which runs through the upper connecting plate (2), the lower connecting plate (11), the bottom plate (10) and the top plate (3).

6. The long-endurance battery module for a low-speed vehicle according to claim 1, characterized in that: The air intake mechanism (8) comprises an air intake box (801) mounted on the outer wall at the bottom of the base plate (10), a plurality of partitions (805) being mounted in the air intake box (801), the air cooling groove (105) and the spacing channel being divided into a plurality of areas by the plurality of partitions (805), ventilation pipes (802) corresponding to the areas being mounted on the outer walls at both ends of the air intake box (801), valves (803) being mounted on the outer walls of the ventilation pipes (802), and an air collecting pipe (804) connected to the ventilation pipes (802) being mounted on the air intake box (801).

7. The long-endurance battery module for a low-speed vehicle according to claim 1, characterized in that: A plurality of heat dissipation fins (102) are installed on the outer wall of the square liquid cooling frame (101); the heat dissipation fins (102) are "T"-shaped, and an "H"-shaped structure is formed by the plurality of "T"-shaped heat dissipation fins (102) and the square liquid cooling frame (101), thereby improving the anti-collision and anti-extrusion capabilities of the square liquid cooling frame (101).

8. The long-endurance battery module for a low-speed vehicle according to claim 1, characterized in that: An aluminum alloy ring (15) is installed on the outer wall of the battery unit (5), positioning grooves (12) are provided on four edges of the top outer wall of the top plate (3), and positioning columns (14) adapted to the positioning grooves (12) are installed on four edges of the bottom outer wall of the bottom plate (10).

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