Lithium battery energy storage module and air cooling method thereof

Abstract

The invention discloses a lithium battery energy storage module and an air cooling method thereof, the lithium battery energy storage module comprises a box body and a battery module, the battery module comprises at least two battery monomers, and a cooling assembly, a control device and at least two temperature sensors are arranged in the box body; the cooling assembly comprises an air cooling device and a linear driving mechanism, and the air cooling device and the battery module are oppositely arranged; the linear driving mechanism is used for driving the air cooling device to move along the arrangement direction of the at least two battery monomers so as to carry out air cooling heat dissipation on different battery monomers; the at least two temperature sensors are distributed in different areas in the box body; and the control device is used for controlling the linear driving mechanism to drive the air cooling device to move to different air cooling positions and controlling the air outlet rate of the air cooling device based on the set position and the detection value of the temperature sensor, so that the battery monomers with relatively high heating value can be quickly cooled, and the service life of the battery module is prolonged.

Description

Technical Field

[0001] The present invention belongs to the technical field of lithium batteries, and in particular relates to a lithium battery energy storage module and an air cooling method thereof. Background Art

[0002] With the continuous development of science and technology, lithium batteries, as an important energy storage device, have been widely used in various fields. For example, in common electric vehicles, lithium batteries, as the power source of electric vehicles, play an important role in the performance of electric vehicles such as cruising range.

[0003] Usually, electric vehicles are equipped with lithium battery energy storage modules, which are composed of a box and multiple battery cells arranged in the box. The multiple battery cells are electrically connected to each other and can provide electric energy for the electric vehicle. In order to improve the heat dissipation performance of the battery energy storage module, the side panels of the box are usually provided with perforations, and fans are fixed in the perforations. By controlling the rotation of the fans, the heat dissipation airflow can be driven to flow in the box, thereby realizing air cooling and heat dissipation of the battery cells.

[0004] However, when the above-mentioned lithium battery energy storage module is used, since the fan is fixedly installed on the side panel of the box, when the fan is working, the battery cells close to the fan dissipate heat quickly, while the battery cells far away from the fan dissipate heat slowly. As a result, when the battery cells far away from the fan generate high heat, they are far away from the fan and dissipate heat slowly, so they cannot be cooled down quickly, which affects the service life of the battery cells and further affects the service life of the lithium battery energy storage module. Summary of the invention

[0005] In order to solve the above problems existing in the prior art, the present invention provides a lithium battery energy storage module and an air cooling method thereof. The technical problem to be solved by the present invention is achieved through the following technical solutions: In a first aspect, the present invention provides a lithium battery energy storage module, comprising a box and a battery module arranged in the box, the battery module comprising at least two battery cells, a heat dissipation gap between two adjacent battery cells, a cooling assembly, a control device and at least two temperature sensors are arranged in the box; the cooling assembly comprises an air cooling device and a linear drive mechanism, the air cooling device is arranged relative to the battery module, and is used to perform air cooling and heat dissipation on the battery module; the linear drive mechanism is connected to the air cooling device and is arranged along the arrangement direction of at least two battery cells, and is used to drive the air cooling device to move along the arrangement direction of at least two battery cells, so as to perform air cooling and heat dissipation on different battery cells; at least two temperature sensors are distributed in different areas of the box, so as to detect temperature values ​​of different areas in the box; the control device is used to control the linear drive mechanism to drive the air cooling device to move to different air cooling positions and control the air outlet rate of the air cooling device based on the setting position and detection value of the temperature sensor.

[0006] In one embodiment of the present invention, at least two battery cells are distributed in an array, and the cooling assembly includes a first cooling assembly and a second cooling assembly; the first cooling assembly includes a first air-cooling device and a first linear drive mechanism, the first linear drive mechanism is arranged along a first direction, and the first linear drive mechanism is used to drive the first air-cooling device to move along the first direction; the second cooling assembly includes a second air-cooling device and a second linear drive mechanism, the second linear drive mechanism is arranged along a second direction, and the second linear drive mechanism is used to drive the second air-cooling device to move along the second direction; the first direction and the second direction are perpendicular to each other.

[0007] In one embodiment of the present invention, the box body includes a bottom plate and an annular side plate, the annular side plate includes a front side plate, a left side plate, a rear side plate, and a right side plate which are connected end to end in sequence, the annular side plate is fixed to the bottom plate, and together with the bottom plate, forms a containing cavity; a carrying plate, a cover plate and at least two columns are provided in the containing cavity, a battery module is arranged on the carrying plate, at least two columns are arranged on opposite sides of the carrying plate, the columns are fixedly connected to the bottom plate, the carrying plate and the cover plate are parallel to each other and are both connected to the columns, and the battery module is located between the carrying plate and the cover plate; the first cooling assembly is located between the left side plate and the carrying plate, the second cooling assembly is located between the rear side plate and the carrying plate, at least one of the front side plate and the rear side plate is provided with an air outlet, and when the air cooling device of the cooling assembly is working, the air cooling fluid generated by the air cooling device flows out through the battery module and the air outlet in sequence.

[0008] In one embodiment of the present invention, a first air guide plate is provided between the front side plate and the battery module, and a second air guide plate is provided between the right side plate and the battery module; the supporting plate is a rectangular plate, and the supporting plate includes a first vertex angle and a second vertex angle which are relatively arranged, one end of the first air guide plate is provided at the first vertex angle, and the other end extends toward the air outlet and abuts against the front side plate, one end of the second air guide plate is provided at the second vertex angle, and the other end extends toward the air outlet and abuts against the right side plate; the surfaces of the first air guide plate and the second air guide plate facing the battery module are both arc-shaped surfaces, and the curvature of the arc-shaped surfaces gradually increases in the direction away from the air outlet.

[0009] In one embodiment of the present invention, a cooling pipeline is also included. A mounting groove is provided on one side of the supporting plate away from the battery module. The cooling pipeline is installed in the mounting groove. The cooling pipeline is used to communicate with an external cooling device. The mounting groove includes a plurality of long grooves that are connected in sequence, and a column of battery cells corresponds to at least one long groove.

[0010] In one embodiment of the present invention, the number of temperature sensors is the same as the number of battery cells, and each temperature sensor corresponds to a battery cell; a mounting layer is provided on the surface of one side of the cover plate close to the battery module, and the temperature sensor is arranged on the mounting layer; the mounting layer is made of glass fiber.

[0011] In one embodiment of the present invention, the linear drive mechanism includes a motor, a base and a screw-nut mechanism. The motor and the base are fixedly connected to the box body. The screw-nut mechanism includes a screw and a slider sleeved on the screw. The screw is rotatably connected to the base, and the motor is transmission-connected to the screw. The screw is arranged along the arrangement direction of at least two battery cells, and the air cooling device is connected to the slider; the motor drives the screw to rotate relative to the base, and when the screw rotates, it drives the slider to move along the length direction of the screw, thereby driving the air cooling device to move along the arrangement direction of at least two battery cells.

[0012] In one embodiment of the present invention, the battery module includes at least two layers of battery cells arranged in sequence along a third direction, and the first direction, the second direction and the third direction are perpendicular to each other; at least two cooling assemblies are provided, and at least two cooling assemblies are arranged in sequence along the third direction, and each cooling assembly corresponds to a layer of battery cells.

[0013] In one embodiment of the present invention, the cooling component also includes a servo, which is fixedly connected to the slider, and the air cooling device is connected to the servo, and the servo is used to control the swing angle of the air cooling device; or; the cooling component also includes a swing mechanism, which includes a frame, a driver, a driving gear and a driven gear, the frame is fixedly connected to the slider, the driver is fixed on the frame, the driver is transmission-connected to the driving gear, the driving gear and the driven gear are both rotationally connected to the frame, the driven gear includes a meshing portion and a mounting portion, the meshing portion meshes with the driving gear, the mounting portion is fixedly connected to the air cooling device, and the diameter of the driven gear is larger than the diameter of the driving gear; when the driver drives the driving gear to rotate, the driving gear drives the driven gear to rotate, and when the driven gear rotates, it drives the air cooling device to swing around the axis of the driven gear.

[0014] In a second aspect, the present invention provides a method for air cooling a lithium battery energy storage module, including a lithium battery energy storage module as provided in the above scheme, the lithium battery energy storage module including a casing, a cooling assembly and at least two temperature sensors, at least two temperature sensors being distributed in different areas of the casing, the method including detecting temperature values ​​of different areas of the casing by at least two temperature sensors; based on the setting position and detection value of the temperature sensor, controlling the action of a linear drive mechanism in the cooling assembly to drive the movement of an air cooling device in the cooling assembly to different air cooling positions, and controlling the air outlet rate of the air cooling device.

[0015] Compared with the prior art, the present invention has the following beneficial effects: In the above scheme of the present application, first, the lithium battery energy storage module includes a box body, in which a battery module and a cooling assembly are arranged, and the cooling assembly includes an air cooling device and a linear drive mechanism. The air cooling device is arranged relative to the battery module, and can perform air cooling and heat dissipation on the battery module. The linear drive mechanism is connected to the air cooling device and is arranged along the arrangement direction of at least two battery cells, and can drive the air cooling device to move along the arrangement direction of at least two battery cells to perform air cooling and heat dissipation on different battery cells. In this way, when the battery cell far away from the air cooling device has a high heat generation, the air cooling device can be driven by the linear drive mechanism to move to a position close to the battery cell, thereby shortening the distance between the battery cell and the air cooling device, so that the air cooling fluid generated by the air cooling device can quickly reach the area where the battery cell is located, thereby quickly cooling down the battery cell with a high heat generation, avoiding the battery cell being easily affected when the battery cell is in a high temperature environment for a long time, thereby improving the service life of the battery cell, and further improving the service life of the lithium battery energy storage module.

[0016] Secondly, a control device and at least two temperature sensors are also provided in the box body. At least two temperature sensors are distributed in different areas of the box body and can detect the temperature values ​​of different areas of the box body. The control device can control the linear drive mechanism to drive the air cooling device to move to different air cooling positions and control the air outlet rate of the air cooling device based on the setting position and detection value of the temperature sensor. In this way, the battery cells with higher heat generation are detected by the temperature sensor, and the linear drive mechanism is controlled to drive the moving position of the air cooling device according to the setting position and detection value of the temperature sensor by the control device. This can improve the overall automation of the cooling assembly and the convenience of operation, and can also improve the accuracy of the movement of the air cooling device, so that the air cooling device can accurately face the area where the battery cells with higher heat generation are located, thereby further improving the cooling speed of the battery cells with higher heat generation, and further improving the service life of the battery cells and lithium battery energy storage modules.

[0017] In addition, the battery module includes at least two battery cells, and there is a heat dissipation gap between two adjacent battery cells. The air-cooling fluid generated by the air-cooling device can flow in the heat dissipation gap to form a heat dissipation channel, thereby further improving the heat dissipation speed and heat dissipation effect of the battery cells. In addition, the temperature change of the battery module can be monitored in real time through a temperature sensor to avoid danger when the battery module temperature is too high.

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of a lithium battery energy storage module provided by an embodiment of the present invention; Figure 2 This is a schematic diagram of a lithium battery energy storage module provided by an embodiment of the present invention after a cover plate is removed; Figure 3 is a top view of a lithium battery energy storage module provided by an embodiment of the present invention; Figure 4 yes Figure 3 A partial enlarged view of the linear drive mechanism; Figure 5 It is a schematic diagram of a cooling pipeline in a lithium battery energy storage module provided by an embodiment of the present invention; Figure 6 is a schematic diagram of a linear drive mechanism in an embodiment of the present invention; Figure 7 is a schematic diagram of a reducer of a linear drive mechanism in an embodiment of the present invention; Figure 8 is a schematic diagram of a base of a linear drive mechanism in an embodiment of the present invention; Fig. 9 is a schematic diagram of a swing mechanism in an embodiment of the present invention; Fig.10 It is a schematic diagram of an air cooling method for a lithium battery energy storage module provided in an embodiment of the present invention.

[0020] Figure markings: 1-box, 11-bottom plate, 12-front side plate, 13-left side plate, 14-right side plate, 15-bearing plate, 16-cover plate, 17-column, 18-air outlet, 19-rear side plate, 2-battery module, 21-battery monomer, 3-cooling assembly, 31-first cooling assembly, 32-second cooling assembly, 4-air cooling device, 5-linear drive mechanism, 51-motor, 52-base, 53-screw, 54-slider, 55-reducer, 56-coupling, 6-temperature sensor, 7-first air guide plate, 8-second air guide plate, 9-cooling pipeline, 10-swinging mechanism, 101-frame, 102-driver, 103-driving gear, 104-driven gear, 1041-meshing portion, 1042-installation portion, 105-pulley assembly. DETAILED DESCRIPTION

[0021] The present invention is further described in detail below with reference to specific embodiments, but the embodiments of the present invention are not limited thereto.

[0022] Embodiment 1: See also Figure 1 and Figure 2 The embodiment of the present invention provides a lithium battery energy storage module, including a box body 1 and a battery module 2 arranged in the box body 1, the battery module 2 includes at least two battery cells 21, and there is a heat dissipation gap between two adjacent battery cells 21. The box body 1 is also provided with a cooling component 3, a control device and at least two temperature sensors 6; The cooling assembly 3 includes an air cooling device 4 and a linear drive mechanism 5. The air cooling device 4 is arranged opposite to the battery module 2 and is used to perform air cooling and heat dissipation on the battery module 2. The linear drive mechanism 5 is connected to the air cooling device 4 and is arranged along the arrangement direction of at least two battery cells 21, and is used to drive the air cooling device 4 to move along the arrangement direction of at least two battery cells 21, so as to perform air cooling and heat dissipation on different battery cells 21. At least two temperature sensors 6 are distributed in different areas of the box 1 to detect temperature values ​​of different areas of the box 1; the control device is used to control the linear drive mechanism 5 to drive the air cooling device 4 to move to different air cooling positions and control the air outlet rate of the air cooling device 4 based on the setting position and detection value of the temperature sensor 6.

[0023] In some embodiments of the present application, the battery cells 21 are lithium battery cells 21 , and the number of the battery cells 21 in the battery module 2 may be 2, 3, 4, 5, 6, etc.

[0024] In some embodiments of the present application, the arrangement of the multiple battery cells 21 in the battery module 2 can be a matrix arrangement, a linear arrangement, etc. When the arrangement of the multiple battery cells 21 is a matrix arrangement, the number of battery cells 21 in the battery module 2 can be at least four.

[0025] In some embodiments of the present application, there is a heat dissipation gap between two adjacent battery cells 21. When there are at least three battery cells 21 in the battery module 2, the spacing between any two adjacent battery cells 21 in the same direction is equal. For example, when the arrangement of multiple battery cells 21 is a matrix arrangement, the spacing between any two adjacent battery cells 21 along the row arrangement direction is equal, and the spacing between any two adjacent battery cells 21 along the column arrangement direction is equal.

[0026] In some embodiments of the present application, the air cooling device 4 is a device capable of generating an air-cooling airflow, such as an electric fan, an air-cooling compressor, etc.

[0027] In some embodiments of the present application, the air cooling device 4 can be an electric fan, which includes a motor and a fan. The motor can drive the fan to rotate. The motor is connected to a control device. The control device can control the speed of the fan by controlling the speed of the motor, thereby controlling the air outlet rate of the air cooling device 4.

[0028] In some embodiments of the present application, the linear drive mechanism 5 is a drive mechanism capable of outputting linear motion, such as a screw-nut mechanism, a gear rack mechanism, etc.

[0029] In some embodiments of the present application, when multiple battery cells 21 are arranged linearly, the arrangement direction of the at least two battery cells 21 refers to the linear arrangement direction of the multiple battery cells 21; when multiple battery cells 21 are arranged in a matrix, the arrangement direction of the at least two battery cells 21 can refer to either a row arrangement direction or a column arrangement direction.

[0030] In some embodiments of this application, see Figure 1 , Figure 1 The temperature sensor 6 is indicated by a dotted line, and the temperature sensor 6 is disposed on a surface of the cover plate 16 facing the battery module 2. The number of the temperature sensors 6 may be 2, 3, 4, 5, 6, etc.

[0031] In the above embodiment of the present application, first, the lithium battery energy storage module includes a box body 1, in which a battery module 2 and a cooling assembly 3 are arranged, and the cooling assembly 3 includes an air cooling device 4 and a linear drive mechanism 5. The air cooling device 4 is arranged relative to the battery module 2, and can perform air cooling and heat dissipation on the battery module 2. The linear drive mechanism 5 is connected to the air cooling device 4 and is arranged along the arrangement direction of at least two battery cells 21, and can drive the air cooling device 4 to move along the arrangement direction of at least two battery cells 21, so as to perform air cooling and heat dissipation on different battery cells 21. In this way, when the battery cell 21 far away from the air cooling device 4 has a high heat generation, the air cooling device 4 can be driven by the linear drive mechanism 5 to move to a position close to the battery cell 21, thereby shortening the distance between the battery cell 21 and the air cooling device 4, so that the air-cooling fluid generated by the air cooling device 4 can quickly reach the area where the battery cell 21 is located, thereby quickly cooling down the battery cell 21 with a high heat generation, avoiding the battery cell 21 being easily affected by the service life of the battery cell 21 when it is in a high temperature environment for a long time, thereby improving the service life of the battery cell 21, and then improving the service life of the lithium battery energy storage module.

[0032] Secondly, a control device and at least two temperature sensors 6 are also provided in the box body 1. At least two temperature sensors 6 are distributed in different areas of the box body 1 and can detect the temperature values ​​of different areas of the box body 1. The control device can control the linear drive mechanism 5 to drive the air cooling device 4 to move to different air cooling positions based on the setting position and detection value of the temperature sensor 6. In this way, the battery cell 21 with a higher heat value is detected by the temperature sensor 6, and the linear drive mechanism 5 is controlled by the control device to drive the moving position of the air cooling device 4 according to the setting position and detection value of the temperature sensor 6. This can not only improve the overall automation of the cooling assembly 3 and the convenience of operation, but also improve the accuracy of the movement of the air cooling device 4, so that the air cooling device 4 can accurately face the area where the battery cell 21 with a higher heat value is located, thereby further improving the cooling speed of the battery cell 21 with a higher heat value, and further improving the service life of the battery cell 21 and the lithium battery energy storage module.

[0033] In addition, the battery module 2 includes at least two battery cells 21, and there is a heat dissipation gap between two adjacent battery cells 21. The air-cooling fluid generated by the air-cooling device 4 can flow in the heat dissipation gap to form a heat dissipation channel, thereby further improving the heat dissipation speed and heat dissipation effect of the battery cells 21. In addition, the temperature change of the battery module 2 can be monitored in real time by the temperature sensor 6 to avoid danger when the temperature of the battery module 2 is too high.

[0034] In some embodiments of this application, see Figure 3 At least two battery cells 21 are distributed in an array, the cooling assembly 3 includes a first cooling assembly 31 and a second cooling assembly 32; the first cooling assembly 31 includes a first air cooling device 4 and a first linear drive mechanism 5, the first linear drive mechanism 5 is arranged along a first direction, and the first linear drive mechanism 5 is used to drive the first air cooling device 4 to move along the first direction; the second cooling assembly 32 includes a second air cooling device 4 and a second linear drive mechanism 5, the second linear drive mechanism 5 is arranged along a second direction, and the second linear drive mechanism 5 is used to drive the second air cooling device 4 to move along the second direction; the first direction and the second direction are perpendicular to each other.

[0035] It can be understood that by driving the first air cooling device 4 to move along the first direction through the first linear drive mechanism 5 in the first cooling assembly 31, the first air cooling device 4 can be directed toward different columns of the battery cells 21 distributed in the array, thereby enabling the first air cooling device 4 to air cool the battery cells 21 in different columns; by driving the second linear drive mechanism 5 in the second cooling assembly 32, the second air cooling device 4 can be directed toward different rows of the battery cells 21 distributed in the array, thereby enabling the second air cooling device 4 to air cool the battery cells 21 in different rows. By air cooling the battery module 2 with two sets of cooling assemblies 3 at the same time, the cooling speed of the battery cells 21 with higher heat generation can be further improved, thereby further improving the service life of the battery cells 21 and the lithium battery energy storage module, and making the temperature distribution of each battery cell 21 in the box 1 more balanced.

[0036] In some embodiments of the present application, Figure 2 As shown, the first direction is Figure 2 The direction x shown in FIG. 1 is the row arrangement direction of the battery cells 21 distributed in an array. The second direction is Figure 2 The direction y shown in FIG. 1 is the column arrangement direction of the battery cells 21 distributed in an array.

[0037] In some embodiments of this application, see Figures 1 to 3 The box body 1 includes a bottom plate 11 and an annular side plate, the annular side plate includes a front side plate 12, a left side plate 13, a rear side plate 19, and a right side plate 14 connected end to end in sequence, the annular side plate is fixed to the bottom plate 11, and together with the bottom plate 11, it forms a receiving cavity; a bearing plate 15, a cover plate 16 and at least two columns 17 are provided in the receiving cavity, the battery module 2 is arranged on the bearing plate 15, at least two columns 17 are arranged on opposite sides of the bearing plate 15, the columns 17 are fixedly connected to the bottom plate 11, and the bearing The plate 15 and the cover plate 16 are parallel to each other and are both connected to the column 17. The battery module 2 is located between the carrier plate 15 and the cover plate 16; the first cooling assembly 31 is located between the left side plate 13 and the carrier plate 15, and the second cooling assembly 32 is located between the rear side plate 19 and the carrier plate 15. At least one of the front side plate 12 and the rear side plate 19 is provided with an air outlet 18. When the air cooling device 4 of the cooling assembly 3 is working, the air cooling fluid generated by the air cooling device 4 flows out through the battery module 2 and the air outlet 18 in sequence.

[0038] It can be understood that the battery module 2 is arranged on the supporting plate 15, and the supporting plate 15 and the cover plate 16 are supported by the columns 17 to form an accommodating space that is open in four directions: the front side, the rear side, the left side, and the right side. The first cooling assembly 31 is located between the left side plate 13 and the supporting plate 15, and the second cooling assembly 32 is located between the rear side plate 19 and the supporting plate 15. When at least one of the front side plate 12 and the rear side plate 19 is provided with an air outlet 18, the air-cooling fluid generated by the first air-cooling device 4 can flow into the battery module 2 from the left side of the battery module 2, and the air-cooling fluid generated by the second air-cooling device 4 can flow into the battery module 2 from the rear side of the battery module 2. After that, the air-cooling fluid can pass through the heat dissipation gap between the battery cells 21, flow out from the front and right sides of the battery module 2, and then flow out from the air outlet 18 on the annular side plate of the box body 1, thereby optimizing the heat dissipation flow channel of the air-cooling fluid, so that the air-cooling fluid can flow more quickly and smoothly between the battery cells 21 to dissipate heat, thereby further improving the heat dissipation performance of the battery module 2.

[0039] In some embodiments of the present application, the cover plate 16 and the supporting plate 15 may be rectangular plates, the number of the columns 17 may be four, and the four columns 17 may be respectively arranged at the four top corners of the cover plate 16 to improve the stability between the cover plate 16 and the supporting plate 15.

[0040] In some embodiments of the present application, a fan may also be provided on the annular side panel of the box body 1. The cooling rate of the lithium battery energy storage module can be further improved by cooperating with the directional fan on the annular side panel and the movable air cooling device in the cooling assembly 3 for air cooling.

[0041] In some embodiments of the present application, the air outlet 18 is arranged at the connection between the front side panel 12 and the right side panel 14 of the box body 1, so that the air outlet 18 corresponds to the top angle of the cover plate 16. In this way, the air-cooling fluid generated by the first air-cooling component and the second air-cooling component can flow quickly to the air outlet 18, thereby improving the heat dissipation efficiency of the lithium battery energy storage module.

[0042] In some embodiments of this application, see Figures 1 to 4 A first air guide plate 7 is provided between the front side plate 12 and the battery module 2, and a second air guide plate 8 is provided between the right side plate 14 and the battery module 2; the supporting plate 15 is a rectangular plate, and the supporting plate 15 includes a first vertex angle and a second vertex angle which are arranged opposite to each other, one end of the first air guide plate 7 is provided at the first vertex angle, and the other end extends toward the air outlet 18 and abuts against the front side plate 12, one end of the second air guide plate 8 is provided at the second vertex angle, and the other end extends toward the air outlet 18 and abuts against the right side plate 14; the surfaces of the first air guide plate 7 and the second air guide plate 8 facing the battery module 2 are both arc-shaped surfaces, and the curvature of the arc-shaped surfaces gradually increases in the direction away from the air outlet 18.

[0043] It is understandable that when the first air guide plate 7 is disposed between the front side plate 12 of the box body 1 and the battery module 2, the air-cooling fluid flowing out from the front side of the battery module 2 can be guided to the air outlet 18, thereby optimizing the heat dissipation flow path and improving the heat dissipation efficiency. At the same time, it can prevent the air-cooling fluid flowing out from the front side of the battery module 2 from flowing to other positions of the box body 1, thereby affecting the overall thermal balance of the lithium battery energy storage module. When the second air guide plate 8 is disposed between the right side plate 14 of the box body 1 and the battery module 2, the air-cooling fluid flowing out from the right side of the battery module 2 can be guided to the air outlet 18, thereby optimizing the heat dissipation flow path and improving the heat dissipation efficiency. At the same time, it can prevent the air-cooling fluid flowing out from the right side of the battery module 2 from flowing to other positions of the box body 1, thereby affecting the overall thermal balance of the lithium battery energy storage module. Secondly, when the air-cooling fluid flows out from the battery module 2, the closer the air-cooling fluid is to the battery module 2, the faster the flow rate and the higher the temperature. At this time, when the surfaces of the first air guide plate 7 and the second air guide plate 8 facing the battery module 2 are both arc-shaped surfaces, and the curvature of the arc-shaped surfaces gradually increases in the direction away from the air outlet 18, it can be ensured that when the air-cooling fluid just flows out from the battery module 2, there is sufficient flow space between the first air guide plate 7 and the second air guide plate 8 and the battery module 2, so as to prevent the air-cooling fluid from flowing back into the battery module 2 and affecting the heat dissipation effect of the battery cell 21. At the same time, under the guidance of the arc-shaped surfaces, the air-cooling fluid can flow smoothly to the air outlet 18, so as to avoid the air-cooling fluid from colliding with the angle of the first air guide plate 7 and the second air guide plate 8. The angle position causes the air-cooling fluid to change direction easily, causing airflow turbulence, affecting the flow of the air-cooling fluid, and further affecting the heat dissipation effect of the lithium battery energy storage module.

[0044] In some embodiments of the present application, Figure 5 As shown, the lithium battery energy storage module also includes a cooling pipe 9. A mounting groove is provided on the side of the carrier plate 15 away from the battery module 2. The cooling pipe 9 is installed in the mounting groove. The cooling pipe 9 is used to communicate with an external cooling device; the mounting groove includes a plurality of long grooves that are connected in sequence, and a column of battery cells 21 corresponds to at least one long groove.

[0045] It can be understood that after the cooling pipe 9 is installed in the installation groove, the external cooling equipment can input the cooling fluid into the cooling pipe 9. When the cooling fluid flows in the cooling pipe 9, it can take away the heat generated by the battery cell 21, thereby further reducing the temperature of the battery module 2 and improving the heat dissipation performance of the lithium battery energy storage module.

[0046] In some embodiments of the present application, the number of temperature sensors 6 is the same as the number of battery cells 21, and each temperature sensor 6 corresponds to a battery cell 21; a mounting layer is provided on the surface of one side of the cover plate 16 close to the battery module 2, and the temperature sensor 6 is arranged on the mounting layer; the material of the mounting layer is glass fiber.

[0047] It is understandable that each battery cell 21 has a corresponding temperature sensor 6 that detects its own temperature value separately. In this way, the temperature change of each battery cell 21 can be accurately detected, and then the moving position of the air cooling device 4 in the cooling assembly 3 can be accurately controlled, so that the air cooling device 4 can accurately cool the battery cell 21 with higher heat generation, thereby improving the cooling speed of the battery cell 21. Secondly, when the material of the mounting layer is glass fiber, the loose, porous and light characteristics of the glass fiber can be used to effectively reduce the weight pressure of the battery cell 21, and avoid deformation and damage of the battery cell 21 after being squeezed by the cover plate 16. At the same time, the mutual influence between each temperature sensor 6 can be reduced to ensure the detection accuracy of the temperature sensor 6.

[0048] In some embodiments of the present application, Figure 3 As shown, the battery cells 21 in the battery module 2 are arranged in an array of 6 rows and 4 columns, the temperature sensors 6 are disposed on the cover plate 16 , also arranged in an array of 6 rows and 4 columns, and the plurality of temperature sensors 6 correspond one to one to the plurality of battery cells 21 .

[0049] In some embodiments of this application, see Figures 4 to 8 The linear drive mechanism 5 includes a motor 51, a base 52 and a screw-nut mechanism. The motor 51 and the base 52 are fixedly connected to the box body 1. The screw-nut mechanism includes a screw 53 and a slider 54 sleeved on the screw 53. The screw 53 is rotatably connected to the base 52. The motor 51 is transmission-connected to the screw 53. The screw 53 is arranged along the arrangement direction of at least two battery cells 21. The air cooling device 4 is connected to the slider 54. The motor 51 drives the screw 53 to rotate relative to the base 52. When the screw 53 rotates, it drives the slider 54 to move along the length direction of the screw 53, thereby driving the air cooling device 4 to move along the arrangement direction of at least two battery cells 21.

[0050] It can be understood that the motor 51 drives the screw rod 53 to rotate, and when the screw rod 53 rotates, it drives the slider 54 to move along the length direction of the screw rod 53, and then drives the air cooling device 4 to move to different cooling positions along the arrangement direction of at least two battery cells 21, so that the air cooling device 4 can be moved to a position close to the battery cell 21 with higher heat generation, so that the air cooling fluid generated by the air cooling device 4 can quickly reach the area where the battery cell 21 with higher heat generation is located, and then the battery cell 21 with higher heat generation can be quickly cooled down, avoiding the battery cell 21 being easily affected by the service life of the battery cell 21 when it is in a high temperature environment for a long time, thereby improving the service life of the battery cell 21, and then improving the service life of the lithium battery energy storage module.

[0051] In some embodiments of the present application, the screw nut mechanism may be a ball screw nut mechanism or a sliding screw nut mechanism. When the screw nut mechanism is a ball screw nut mechanism, an external thread is provided on the outer surface of the screw 53, an internal thread is provided in the slider 54, and a ball is provided between the external thread and the internal thread, so that when the screw 53 rotates, the slider 54 can be driven to move along the length direction of the screw 53. When the screw nut mechanism is a sliding screw nut mechanism, an external thread is provided on the outer surface of the screw 53, an internal thread is provided in the slider 54, and the external thread and the internal thread are threadedly matched, so that when the screw 53 rotates, the slider 54 can be driven to move along the length direction of the screw 53.

[0052] In some embodiments of the present application, Figures 6 to 8 As shown, a coupling 56 and a reducer 55 are further provided between the motor 51 and the screw rod 53. The motor shaft of the motor 51, the reducer 55, the coupling 56 and the screw rod 53 are connected in sequence, so that the screw rod 53 can be driven to rotate when the motor 51 rotates. The reducer 55 can be a gear reducer.

[0053] In some embodiments of the present application, two bases 52 are provided, and the two bases 52 are rotatably connected to the two ends of the screw rod 53 respectively. In this way, the stability of the screw rod 53 can be improved.

[0054] In some embodiments of the present application, the first linear drive mechanism 5 in the first cooling component 31 and the second linear drive mechanism 5 in the second cooling component 32 are both linear drive mechanisms 5 composed of a motor 51, a base 52 and a screw-nut mechanism.

[0055] In some embodiments of the present application, the battery module 2 includes at least two layers of battery cells 21 arranged in sequence along a third direction, and the first direction, the second direction and the third direction are perpendicular to each other; at least two cooling assemblies 3 are provided, and at least two cooling assemblies 3 are arranged in sequence along the third direction, and each cooling assembly 3 corresponds to a layer of battery cells 21.

[0056] It is understandable that when the battery module 2 includes multiple layers of battery cells 21 arranged along a third direction, each layer of battery cells 21 can be cooled down separately by multiple cooling components 3 arranged along the third direction, thereby further improving the heat dissipation performance of the battery module 2.

[0057] In some embodiments of this application, please refer to Figure 1 and Figure 2 , the third direction is Figure 2 The direction z in FIG. 1 is the height direction of the battery cell 21 .

[0058] In an optional manner, the cooling assembly 3 further includes a steering gear, the steering gear is fixedly connected to the slider 54, the air cooling device 4 is connected to the steering gear, and the steering gear is used to control the swing angle of the air cooling device 4. The steering gear is an existing motor capable of controlling the swing angle, and the swing angle of the air cooling device 4 is controlled by the steering gear, so that the flow direction of the air cooling airflow can be changed, so that the air cooling airflow can flow to various areas in the box body 1 more evenly, thereby improving the heat dissipation effect of the battery module 2.

[0059] In another alternative, if Fig. 9 As shown, the cooling assembly 3 also includes a swing mechanism 10, which includes a frame 101, a driver 102, a driving gear 103 and a driven gear 104. The frame 101 is fixedly connected to the slider 54, the driver 102 is fixed on the frame 101, the driver 102 is transmission-connected to the driving gear 103, the driving gear 103 and the driven gear 104 are both rotationally connected to the frame 101, the driven gear 104 includes a meshing portion 1041 and a mounting portion 1042, the meshing portion 1041 meshes with the driving gear 103, the mounting portion 1042 is fixedly connected to the air cooling device 4, and the diameter of the driven gear 104 is larger than the diameter of the driving gear 103; when the driver 102 drives the driving gear 103 to rotate, the driving gear 103 drives the driven gear 104 to rotate, and when the driven gear 104 rotates, it drives the air cooling device 4 to swing around the axis of the driven gear 104.

[0060] It can be understood that by controlling the air cooling device 4 to swing through the swing mechanism 10, the flow direction of the air cooling airflow generated by the air cooling device 4 can be changed, the air cooling flow channel can be optimized, and the heat dissipation performance of the battery module 2 can be improved. Secondly, the first air cooling device 4 of the first cooling component 31 and the second air cooling device 4 of the second cooling component 32 can change their directions through the swing mechanism 10 respectively, so that the air cooling airflow generated by the first air cooling device 4 can avoid the air cooling airflow generated by the second air cooling device 4, so as to avoid the air cooling airflow generated by the two The intensity is too large to affect the intensity and flow direction of the airflow, and then affect the heat dissipation performance of the battery cell 21. In addition, when the battery module 2 includes multiple layers of battery cells 21 arranged along the third direction, the air cooling device 4 can be controlled to swing through the swing mechanism 10, so that the air cooling device 4 can air cool the battery cells 21 of different layers, and further improve the heat dissipation effect of the battery module 2. In addition, by controlling the air cooling device 4 to swing through the swing mechanism 10, the heat dissipation area can be expanded, making the heat dissipation more uniform.

[0061] In some embodiments of the present application, the axis of the driving gear 103 is parallel to the axis of the driven gear 104. The axis of the driving gear 103 can be parallel to the axis of the screw rod 53, so that the swing mechanism 10 can control the air cooling device 4 to swing up and down in the third direction; the axis of the driving gear 103 can also be perpendicular to the axis of the screw rod 53, so that the swing mechanism 10 can control the air cooling device 4 to swing forward and backward in the first direction, or to swing left and right in the second direction.

[0062] In some embodiments of the present application, the swing mechanism 10 further includes a pulley assembly 105, the pulley assembly 105 includes a small pulley and a large pulley, the small pulley is connected to the driver 102, and the large pulley is fixedly connected to the driving gear 103 via the same shaft. In this way, the driver 102 drives the small pulley to rotate, and the rotation of the small pulley drives the large pulley to rotate, and then drives the driving gear 103 to rotate, so that the rotation speed of the driving gear 103 can be controlled by the pulley assembly 105, so as to prevent the driving gear 103 from rotating too fast and affecting the swing frequency of the air cooling device 4.

[0063] In some embodiments of the present application, when the air cooling device is controlled to swing by the steering gear or the swing mechanism 10, the steering gear or the swing mechanism 10 can control the air cooling device 4 to swing evenly within a swing angle range of -30° to 30°.

[0064] Embodiment 2: like Fig.10 As shown, an embodiment of the present invention provides an air cooling method for a lithium battery energy storage module, including a lithium battery energy storage module as provided in any one of the above-mentioned embodiment one, the lithium battery energy storage module includes a box body, a cooling assembly and at least two temperature sensors, and the at least two temperature sensors are distributed in different areas of the box body. The method includes detecting the temperature values ​​of different areas in the box body by at least two temperature sensors; based on the setting position and detection value of the temperature sensor, controlling the action of the linear drive mechanism in the cooling assembly to drive the air cooling device in the cooling assembly to move to different air cooling positions, and controlling the air outlet rate of the air cooling device.

[0065] The beneficial effects of the second embodiment of the present invention and its various implementations can be analyzed by referring to the beneficial effects of the first embodiment and its various implementations, and will not be described in detail here.

[0066] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "upper", "lower", "front", "back", "left", "right", "inside", "outside", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0067] In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first", "second", and "third" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0068] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0069] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A lithium battery energy storage module, comprising a box and a battery module disposed in the box, wherein the battery module comprises at least two battery cells, and a heat dissipation gap exists between two adjacent battery cells, characterized in that: The box body is provided with a cooling assembly, a control device and at least two temperature sensors; The cooling assembly includes an air cooling device and a linear drive mechanism, wherein the air cooling device is arranged opposite to the battery module and is used for air cooling and heat dissipation of the battery module; The linear drive mechanism is connected to the air cooling device and is arranged along the arrangement direction of at least two of the battery cells, and is used to drive the air cooling device to move along the arrangement direction of at least two of the battery cells to perform air cooling and heat dissipation on different battery cells; At least two of the temperature sensors are distributed in different areas of the box to detect temperature values ​​of different areas of the box; The control device is used to control the linear drive mechanism to drive the air cooling device to move to different air cooling positions and control the air outlet rate of the air cooling device based on the setting position and detection value of the temperature sensor.

2. The lithium battery energy storage module according to claim 1, characterized in that: At least two of the battery cells are distributed in an array, and the cooling assembly includes a first cooling assembly and a second cooling assembly; The first cooling assembly includes a first air cooling device and a first linear driving mechanism, the first linear driving mechanism is arranged along a first direction, and the first linear driving mechanism is used to drive the first air cooling device to move along the first direction; The second cooling assembly includes a second air cooling device and a second linear drive mechanism, the second linear drive mechanism is arranged along a second direction, and the second linear drive mechanism is used to drive the second air cooling device to move along the second direction; The first direction and the second direction are perpendicular to each other.

3. The lithium battery energy storage module according to claim 2, characterized in that: The box body includes a bottom plate and an annular side plate, the annular side plate includes a front side plate, a left side plate, a rear side plate, and a right side plate connected end to end in sequence, the annular side plate is fixed to the bottom plate, and together with the bottom plate, forms a containing cavity; A carrying plate, a cover plate and at least two columns are provided in the accommodating cavity, the battery module is provided on the carrying plate, at least two columns are provided on opposite sides of the carrying plate, the columns are fixedly connected to the bottom plate, the carrying plate and the cover plate are parallel to each other and are both connected to the columns, and the battery module is located between the carrying plate and the cover plate; The first cooling component is located between the left side plate and the supporting plate, the second cooling component is located between the rear side plate and the supporting plate, at least one of the front side plate and the rear side plate is provided with an air outlet, and when the air cooling device of the cooling component is working, the air cooling fluid generated by the air cooling device flows out through the battery module and the air outlet in sequence.

4. The lithium battery energy storage module according to claim 3, characterized in that: A first air guide plate is provided between the front side plate and the battery module, and a second air guide plate is provided between the right side plate and the battery module; The bearing plate is a rectangular plate, and includes a first vertex and a second vertex that are arranged opposite to each other. One end of the first air guide plate is arranged at the first vertex, and the other end extends toward the air outlet and abuts against the front side plate. One end of the second air guide plate is arranged at the second vertex, and the other end extends toward the air outlet and abuts against the right side plate. The surfaces of the first air guide plate and the second air guide plate facing the battery module are both arc-shaped surfaces, and the curvature of the arc-shaped surfaces gradually increases in a direction away from the air outlet.

5. The lithium battery energy storage module according to claim 3, characterized in that: It also includes a cooling pipeline, wherein a mounting groove is provided on one side of the carrier plate away from the battery module, the cooling pipeline is installed in the mounting groove, and the cooling pipeline is used to communicate with an external cooling device; The mounting groove includes a plurality of long grooves that are connected in sequence, and a row of the battery cells corresponds to at least one of the long grooves.

6. The lithium battery energy storage module according to claim 3, characterized in that: The number of the temperature sensors is the same as the number of the battery cells, and each of the temperature sensors corresponds to one of the battery cells; A mounting layer is provided on a surface of one side of the cover plate close to the battery module, and the temperature sensor is arranged on the mounting layer; The material of the installation layer is glass fiber.

7. The lithium battery energy storage module according to claim 2, characterized in that: The linear drive mechanism comprises a motor, a base and a screw-nut mechanism, wherein the motor and the base are both fixedly connected to the box body, the screw-nut mechanism comprises a screw and a slider sleeved on the screw, the screw is rotatably connected to the base, the motor is transmission-connected to the screw, the screw is arranged along the arrangement direction of at least two battery cells, and the air cooling device is connected to the slider; The motor drives the screw rod to rotate relative to the base. When the screw rod rotates, it drives the slider to move along the length direction of the screw rod, thereby driving the air cooling device to move along the arrangement direction of at least two battery cells.

8. The lithium battery energy storage module according to claim 7, characterized in that: The battery module comprises at least two layers of battery cells arranged in sequence along a third direction, wherein the first direction, the second direction and the third direction are perpendicular to each other; At least two cooling assemblies are provided, and the at least two cooling assemblies are arranged in sequence along the third direction, and each cooling assembly corresponds to a layer of battery cells.

9. The lithium battery energy storage module according to claim 7 or 8, characterized in that: The cooling assembly further includes a steering gear, the steering gear is fixedly connected to the slider, the air cooling device is connected to the steering gear, and the steering gear is used to control the swing angle of the air cooling device; or; The cooling assembly also has a swing mechanism, which includes a frame, a driver, a driving gear and a driven gear. The frame is fixedly connected to the slider, the driver is fixed to the frame, the driver is drivingly connected to the driving gear, the driving gear and the driven gear are both rotatably connected to the frame, the driven gear includes a meshing portion and a mounting portion, the meshing portion meshes with the driving gear, the mounting portion is fixedly connected to the air cooling device, and the diameter of the driven gear is larger than the diameter of the driving gear; When the driver drives the driving gear to rotate, the driving gear drives the driven gear to rotate, and when the driven gear rotates, it drives the air cooling device to swing around the axis of the driven gear.

10. A method for air cooling a lithium battery energy storage module, characterized in that: A lithium battery energy storage module according to any one of claims 1 to 9, wherein the lithium battery energy storage module comprises a box, a cooling assembly and at least two temperature sensors, wherein at least two of the temperature sensors are distributed in different areas within the box, and the method comprises: Detecting the temperature values ​​of different areas in the box by at least two of the temperature sensors; Based on the setting position and detection value of the temperature sensor, the linear drive mechanism in the cooling component is controlled to drive the air cooling device in the cooling component to move to different air cooling positions, and the air outlet rate of the air cooling device is controlled.

Images