A lithium battery energy storage module and its temperature control system

Abstract

The present invention discloses a lithium battery energy storage module and a temperature control system thereof, comprising a box body, a battery cell, a switch structure, a linear drive mechanism, a fan and a push rod; a first through hole, a second through hole and a slide groove are provided on a side plate of the box body; the switch structure comprises a first rocker arm, a first connecting rod, a second rocker arm, a second connecting rod and a slider, the first connecting rod is penetrated in the second through hole, one end of the first connecting rod extends into the box body and is connected to the first rocker arm, the other end of the first connecting rod extends out of the box body and is fixedly connected to the second rocker arm, one end of the second connecting rod is rotatably connected to the second rocker arm, and the other end is rotatably connected to the slider, the slider is slidably arranged in the slide groove, and the slider is provided with a third through hole for communicating with a cold source pipeline or a heat source pipeline; the fan and the push rod are both connected to the linear drive mechanism, and the linear drive mechanism is used to drive the fan and the push rod to move simultaneously in the first direction, thereby improving the convenience of use and the service life of the lithium battery energy storage module.

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 a temperature control system 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 a temperature control system thereof. The technical problem to be solved by the present invention is achieved through the following technical solutions:

[0006] In the first aspect, the present invention provides a lithium battery energy storage module, including a box body and at least two battery cells arranged in the box body, a heat dissipation gap exists between two adjacent battery cells, and the lithium battery energy storage module also includes a switch structure, a linear drive mechanism, a fan and a push rod; the box body includes a side panel, a first through hole and a second through hole are provided on the side panel, a slide groove is provided on the surface of the side panel facing the outside of the box body, and one end opening of the first through hole is located in the slide groove; the switch structure includes a first rocker arm, a first connecting rod, a second rocker arm, a second connecting rod and a slider, the first rocker arm is arranged on the inside of the box body, and the second rocker arm is arranged on the outside of the box body; the first connecting rod is penetrated in the second through hole and cooperates with the gap of the second through hole, one end of the first connecting rod extends into the box body and is connected to the first rocker arm, and the other end of the first connecting rod extends out of the box body and is fixedly connected to the second rocker arm When the first rocker arm rotates, the second rocker arm is driven to rotate through the first connecting rod; one end of the second connecting rod is rotatably connected to the second rocker arm, and the other end is rotatably connected to the slider, the slider is slidably arranged in the slide groove, and the slider is provided with a third through-hole for communicating with the cold source pipeline or the heat source pipeline. When the second rocker arm rotates, the slider is driven to slide in the slide groove through the second connecting rod, so that the third through-hole and the first through-hole are connected or staggered; the fan and the push rod are both connected to the linear drive mechanism, the fan is arranged opposite to the battery cell or the heat dissipation gap, the linear drive mechanism is used to drive the fan and the push rod to move simultaneously in the first direction, the push rod and the first rocker arm are arranged sequentially along the first direction, and when the linear drive mechanism drives the push rod to move, the push rod touches the first rocker arm and applies a force to the first rocker arm to rotate the first rocker arm, and the first direction is the arrangement direction of at least two battery cells.

[0007] In one embodiment of the present invention, it also includes a ratchet and a pawl; a through hole is provided on the first rocker, one end of the first connecting rod is inserted into the through hole and matches with the gap of the through hole, the ratchet is sleeved on the outside of the first connecting rod and fixedly connected to the first connecting rod, and the outer periphery of the ratchet has a slot; the pawl includes a base, a claw and a spring, the base is fixedly connected to the first rocker, the claw is slidably connected to the base, and the spring is arranged between the claw and the base; when the first rocker rotates along the second direction, the claw is engaged in the slot, the first rocker drives the ratchet to rotate in the second direction through the claw, and when the ratchet rotates, it drives the first connecting rod to rotate in the second direction; when the first rocker rotates along the third direction, the first rocker drives the claw to rotate, the claw slides and contracts relative to the base in a direction away from the axis of the ratchet, and squeezes the spring, the claw slides over the ratchet along the circumference of the ratchet, and the ratchet does not rotate; the second direction and the third direction are opposite.

[0008] In one embodiment of the present invention, the base includes a connecting plate and a boss that are fixedly connected, the connecting plate is fixedly connected to the first rocker, and the boss is provided with a first hole and a second hole in sequence along the radial direction of the ratchet and in a direction away from the axis of the ratchet, and the aperture of the first hole is larger than the aperture of the second hole; the claw includes a clamping block, a sliding rod and a stopper that are connected in sequence, the sliding rod passes through the first hole and the second hole in sequence, the spring is arranged in the first hole and is located between the clamping block and the bottom surface of the first hole, the stopper is limitedly matched with the surface of the boss away from the ratchet, and the clamping block is clamped in the clamping groove.

[0009] In one embodiment of the present invention, the claw also includes a limiting rod, and a limiting groove is provided on the surface of the boss away from the ratchet wheel. The limiting rod is fixedly connected to the stop block and is limitedly fitted in the limiting groove; there are multiple limiting grooves, and the multiple limiting grooves are distributed at intervals along the circumference of the sliding rod, and the spacing between any pair of adjacent limiting grooves is equal.

[0010] In one embodiment of the present invention, the shape of the block along a cross section perpendicular to the ratchet axis is a right triangle, and one of the right-angled sides of the right triangle faces the first hole.

[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. The screw-nut mechanism includes a screw and a slide 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 a first direction, and the fan and the push rod are connected to the slide. The motor drives the screw to rotate relative to the base. When the screw rotates, it drives the slide to move along the length direction of the screw. When the slide moves, it drives the fan and the push rod to move simultaneously in the first direction.

[0012] In one embodiment of the present invention, the push rod includes an intermediate rod and a front push rod, the intermediate rod is fixedly connected to the slide, one end of the front push rod is connected to the intermediate rod, and the other end extends along the first direction, and the length direction of the intermediate rod is perpendicular to the axial direction of the screw rod and parallel to the axial direction of the fan; in the initial state, the distance between the slider and the first through-hole is equal to the length of the front push rod, and the first rocker arm is in an inclined state; when the slide drives the push rod to move along the first direction and contacts the first rocker arm, the first rocker arm abuts against the front end face of the push rod, and the surface of the first rocker arm abutting against the push rod is an arc-shaped surface, and there is a gap between the block and the slot in the circumferential direction of the ratchet.

[0013] In one embodiment of the present invention, in the first direction, a plurality of switch structures are provided, a plurality of first perforations, second perforations and slide grooves are provided on the side panel, and the plurality of first perforations, second perforations and slide grooves are respectively matched with the plurality of switch structures; in the first direction, at least three battery cells are provided, at least two heat dissipation gaps are provided, and the plurality of first perforations respectively correspond to the at least two heat dissipation gaps.

[0014] In one embodiment of the present invention, it also includes a control device and at least two temperature sensors, and the at least two temperature sensors are distributed in different areas of the box to detect the temperature values ​​of different areas of the box; the control device is used to control the linear drive mechanism to drive the movement of the fan and control the speed of the fan based on the setting position and detection value of the temperature sensor.

[0015] In a second aspect, the present invention provides a temperature control system for a lithium battery energy storage module, comprising at least two lithium battery energy storage modules as provided in the above scheme, an air outlet being provided on a box body of the lithium battery energy storage module, a temperature sensor being provided in the box body, the temperature control system further comprising an air compressor, a vortex tube, a control system and at least two fluid pipelines; the air compressor is connected to the air outlet, the vortex tube is connected to the air compressor, a fluid pipeline is connected between each lithium battery energy storage module and the vortex tube, one end of the fluid pipeline is connected to the third perforation of the slider of the lithium battery energy storage module; the control system is used to control the vortex tube to input a cold source fluid or a heat source fluid into the box body through the fluid pipeline according to the detection value of the temperature sensor.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] In the above scheme of the present application, firstly, the lithium battery energy storage module includes a box body, in which a battery cell, a linear drive mechanism and a fan are arranged, and the linear drive mechanism drives the fan to move in a first direction. In this way, when the battery cell far away from the fan has a high heat generation, the fan 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 fan, so that the air-cooling fluid generated by the fan 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 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.

[0018] Secondly, the lithium battery energy storage module also includes a switch structure, which includes a first rocker, a first connecting rod, a second rocker, a second connecting rod and a slider. The side panel of the box body is provided with a first perforation, a second perforation and a slide groove. The first connecting rod is inserted into the second perforation. One end of the first connecting rod extends into the box body and is connected to the first rocker, and the other end extends out of the box body and is fixedly connected to the second rocker. One end of the second connecting rod is rotatably connected to the second rocker, and the other end is rotatably connected to the slider. The slider is slidably arranged in the slide groove. In this way, by controlling the rotation of the first rocker, the slider can be controlled to slide in the slide groove, so that the third perforation on the slider can be connected or staggered with the first perforation on the side panel, and the switch structure can control whether the external cold source gas or hot source gas can flow into the box body. When the third perforation and the first perforation are connected, the switch structure is in an open state, and the external cold source fluid or heat source fluid can pass through the third perforation and the first perforation and flow into the box body for temperature adjustment, thereby avoiding the battery cell in the box body from being affected by excessively high or low temperatures; when the third perforation and the first perforation are staggered, the switch structure is in a closed state, and the external cold source fluid or heat source fluid cannot flow into the box body, thereby avoiding the cold source fluid or heat source fluid flowing into the box body from affecting the temperature balance of the battery cell in the box body when the volume is large.

[0019] Furthermore, in the switch structure of the present application, the push rod and the first rocker are sequentially arranged along the first direction. When the linear drive mechanism drives the push rod to move, the push rod touches the first rocker and applies a force to the first rocker to rotate the first rocker, thereby making the third through hole conductive or staggered with the first through hole. In this way, the switch structure does not need to be additionally provided with a controller to independently control the rotation of the first rocker to realize the opening or closing of the switch structure, thereby further simplifying the structure of the lithium battery energy storage module, making the lithium battery energy storage module more convenient to install and use.

[0020] In addition, after the external cold source fluid or heat source fluid flows into the box through the third perforation and the first perforation, the fan can guide the fluid to flow quickly to the area of ​​temperature imbalance, thereby quickly adjusting the temperature of the battery cell, avoiding the battery cell being in a high or low temperature environment for a long time, which can easily affect the service life of the battery cell, thereby improving the service life of the battery cell.

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of a lithium battery energy storage module provided by an embodiment of the present invention;

[0023] Figure 2 is a schematic diagram of a box side panel and a switch structure in an embodiment of the present invention;

[0024] Figure 3is a schematic diagram of a linear drive mechanism and a switch structure in an embodiment of the present invention;

[0025] Figure 4 Schematic diagram of the switch structure and fan in the embodiment of the present invention Figure 1 ;

[0026] Figure 5 Schematic diagram of the switch structure and fan in the embodiment of the present invention Figure 2 ;

[0027] Figure 6 Schematic diagram of the ratchet and the claw in the embodiment of the present invention Figure 1 ;

[0028] Figure 7 Schematic diagram of the ratchet and the claw in the embodiment of the present invention Figure 2 ;

[0029] Figure 8 Schematic diagram of a clamping claw in an embodiment of the present invention;

[0030] Fig. 9 is a top view of a lithium battery energy storage module provided by an embodiment of the present invention;

[0031] Fig.10 It is a schematic diagram of a temperature control system for a lithium battery energy storage module provided in an embodiment of the present invention.

[0032] Figure markings: 1-box, 11-bottom plate, 12-side plate, 121-slide, 13-air outlet, 14-first air guide plate, 15-second air guide plate, 2-battery cell, 3-switch structure, 31-first rocker, 32-first connecting rod, 33-second rocker, 34-second connecting rod, 35-slider, 4-linear drive mechanism, 41-motor, 42-reducer, 43-seat, 44-screw, 45-slide, 5-fan, 6-push rod, 61-middle rod, 62-front push rod, 7-ratchet, 71-slot, 8-pawl, 81-base, 811-connecting plate, 812-boss, 8121-limiting groove, 82-claw, 821-block, 822-slide, 823-block, 824-limiting rod, 83-spring, 9-temperature sensor. DETAILED DESCRIPTION

[0033] 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.

[0034] Embodiment 1:

[0035] See also Figure 1 , Figure 2 and Figure 3The embodiment of the present invention provides a lithium battery energy storage module, including a box body 1 and at least two battery cells 2 arranged in the box body 1, a heat dissipation gap is provided between two adjacent battery cells 2, and the lithium battery energy storage module further includes a switch structure 3, a linear drive mechanism 4, a fan 5 and a push rod 6; the box body 1 includes a side plate 12, a first through hole and a second through hole are provided on the side plate 12, a slide groove 121 is provided on the surface of the side plate 12 facing the outside of the box body 1, and one end opening of the first through hole is located in the slide groove 121;

[0036] The switch structure 3 includes a first rocker 31, a first connecting rod 32, a second rocker 33, a second connecting rod 34 and a slider 35. The first rocker 31 is arranged on the inner side of the box body 1, and the second rocker 33 is arranged on the outer side of the box body 1; the first connecting rod 32 is penetrated in the second through hole and is matched with the clearance of the second through hole. One end of the first connecting rod 32 extends into the box body 1 and is connected to the first rocker 31, and the other end of the first connecting rod 32 extends out of the box body 1 and is fixedly connected to the second rocker 33. When the rocker 31 rotates, the second rocker 33 is driven to rotate through the first connecting rod 32; one end of the second connecting rod 34 is rotatably connected to the second rocker 33, and the other end is rotatably connected to the slider 35, the slider 35 is slidably arranged in the slide groove 121, and the slider 35 is provided with a third through hole for communicating with the cold source pipeline or the hot source pipeline. When the second rocker 33 rotates, the slider 35 is driven to slide in the slide groove 121 through the second connecting rod 34, so that the third through hole and the first through hole are connected or staggered;

[0037] The fan 5 and the push rod 6 are both connected to the linear drive mechanism 4. The fan 5 is arranged opposite to the battery cell 2 or the heat dissipation gap. The linear drive mechanism 4 is used to drive the fan 5 and the push rod 6 to move simultaneously along the first direction. The push rod 6 and the first rocker 31 are arranged in sequence along the first direction. When the linear drive mechanism 4 drives the push rod 6 to move, the push rod 6 touches the first rocker 31 and applies a force to the first rocker 31 to rotate the first rocker 31. The first direction is the arrangement direction of at least two battery cells 2.

[0038] In some embodiments of the present application, the above-mentioned box body 1 includes a bottom plate 11 and a side plate 12, the side plate 12 is composed of a front side plate, a left side plate, a rear side plate and a right side plate which are sequentially connected to form a ring structure, the side plate 12 and the bottom plate 11 are perpendicular to each other, and the side plate 12 and the bottom plate 11 form a accommodating cavity, and the battery cell 2, the switch structure 3, the linear drive mechanism 4, the fan 5 and the push rod 6 are all arranged in the accommodating cavity.

[0039] In some embodiments of the present application, the battery cells 2 are lithium battery cells, and the number of the battery cells 2 may be 2, 3, 4, 5, 6, etc.

[0040] In some embodiments of the present application, the arrangement of the plurality of battery cells 2 may be a matrix arrangement, a linear arrangement, etc. When the arrangement of the plurality of battery cells 2 is a matrix arrangement, the number of the battery cells 2 may be at least four.

[0041] In some embodiments of the present application, there is a heat dissipation gap between two adjacent battery cells 2. When there are at least three battery cells 2, the spacing between any two adjacent battery cells 2 in the same direction is equal. For example, when the arrangement of multiple battery cells 2 is a matrix arrangement, the spacing between any two adjacent battery cells 2 along the row arrangement direction is equal, and the spacing between any two adjacent battery cells 2 along the column arrangement direction is equal.

[0042] In some embodiments of the present application, the linear drive mechanism 4 is a drive mechanism capable of outputting linear motion, such as a screw-nut mechanism, a gear rack mechanism, and the like.

[0043] In some embodiments of the present application, when multiple battery cells 2 are arranged linearly, the arrangement direction of the at least two battery cells 2 refers to the linear arrangement direction of the multiple battery cells 2; when multiple battery cells 2 are arranged in a matrix, the arrangement direction of the at least two battery cells 2 can refer to either a row arrangement direction or a column arrangement direction.

[0044] In some embodiments of this application, see Figure 1 , the first direction is Figure 1 The direction x shown in FIG. 1 is the row arrangement direction of the battery cells 2 arranged in a matrix.

[0045] In some embodiments of the present application, the fan 5 may be an electric fan, which includes a motor and a fan, and the motor may drive the fan to rotate.

[0046] In some embodiments of the present application, the first end of the first rocker arm 31 is used to abut and cooperate with the push rod 6, the second end of the first rocker arm 31 is connected to the first end of the first connecting rod 32, the first end of the first connecting rod 32 is fixedly connected to the first end of the second rocker arm 33, the second end of the second rocker arm 33 is rotatably connected to the first end of the second connecting rod 34, and the second end of the second connecting rod 34 is rotatably connected to the slider 35, so that when the first rocker arm 31 rotates, the second rocker arm 33 can be driven to rotate synchronously through the first connecting rod 32, and the rotation angle of the first rocker arm 31 and the rotation angle of the second rocker arm 33 are the same. When the second rocker arm 33 rotates, it pulls the first end of the second connecting rod 34 to move in the first direction. When the second connecting rod 34 moves, it pulls the slider 35 along the slide groove 121 through the second end, so that the third through hole on the slider 35 and the first through hole on the side plate 12 are connected or staggered.

[0047] In some embodiments of the present application, the opening and closing process of the switch structure 3 is as follows: the linear drive mechanism 4 drives the push rod 6 to move in a first direction, the push rod 6 moves to contact the first rocker arm 31 and applies a thrust to the first rocker arm 31, so that the first rocker arm 31 rotates, and when the first rocker arm 31 rotates, it drives the first connecting rod 32 to rotate, and when the first connecting rod 32 rotates, it drives the first rocker arm 31 to rotate, and when the first rocker arm 31 rotates, the slider 35 is pulled to move through the second connecting rod 34, so that the third perforation on the slider 35 is connected to the first perforation on the side panel 12. At this time, the switch structure 3 is in an open state, and the external cold source fluid or the heat source fluid can pass through the third perforation and the first perforation into the box body 1. When the switch structure 3 needs to be closed, the linear drive mechanism 4 can drive the push rod 6 to move back in the direction opposite to the first direction, and the push rod 6 is separated from the first rocker arm 31. The first rocker arm 31 and the second rocker arm 33 can be reset to the initial position under the action of their own gravity and the traction force of the second connecting rod 34; or, the linear drive mechanism 4 can drive the push rod 6 to continue moving in the first direction, and the push rod 6 continues to move after lifting the first rocker arm 31 and separates from the first rocker arm 31. The first rocker arm 31 and the second rocker arm 33 can be reset to the initial position under the action of their own gravity and the traction force of the second connecting rod 34, so that the switch structure 3 is in a closed state, and the external cold source fluid or the heat source fluid cannot pass through the third perforation and the first perforation into the box body 1.

[0048] In some embodiments of the present application, at least one of the first connecting rod 32, the second rocker arm 33 and the second connecting rod 34 is provided with a reset torsion spring. When the switch structure 3 is turned on, the first connecting rod 32, the second rocker arm 33 and the second connecting rod 34 move to drive the reset torsion spring to contract. When the switch structure 3 is closed, it can be reset to the initial position by the elastic action of the reset torsion spring.

[0049] In some embodiments of the present application, a first strip protrusion and a second strip protrusion are provided on the outer surface of the side panel 12 of the box body 1, the first strip protrusion and the second strip protrusion are both provided along the first direction and are parallel to each other, the first strip protrusion, the second strip protrusion and the side panel 12 together form a slide groove 121, the slider 35 is provided between the first strip protrusion and the second strip protrusion, and one end opening of the first perforation is also located at the first strip protrusion and the second strip protrusion. In addition, in addition to providing the first strip protrusion and the second strip protrusion on the outer surface of the side panel 12 to form the slide groove 121, a strip groove extending along the first direction can also be directly provided on the outer surface of the side panel 12 as the slide groove 121.

[0050] In some embodiments of the present application, two groups of linear drive mechanisms 4, fans 5, push rods 6 and switch structures 3 are provided in the box body 1, one group is arranged between the left side plate of the box body 1 and the battery cell 2, and the other group is arranged between the rear side plate of the box body 1 and the battery cell 2.

[0051] In some embodiments of the present application, an air outlet 13 is further provided at the junction of the front side plate and the right side plate of the box body 1, and a first air guide plate 14 and a second air guide plate 15 are further provided in the box body 1, wherein the first air guide plate 14 is provided between the front side plate of the box body 1 and the battery cell 2, and the second air guide plate 15 is provided between the right side plate of the box body 1 and the battery cell 2. In this way, the fluid flowing out from the front side and the right side of the battery cell 2 can be guided to the air outlet 13, the fluid flow channel can be optimized, the efficiency of temperature control can be improved, and at the same time, the fluid flowing out from the front side of the battery cell 2 can be prevented from flowing to other positions of the box body 1, which affects the overall thermal balance of the lithium battery energy storage module.

[0052] In some embodiments of the present application, when the battery cells 2 are distributed in a matrix, a deflection air guide plate can be provided at the intersection of the row heat dissipation channel formed between two adjacent rows of battery cells 2 and the column heat dissipation channel formed between two adjacent columns. The deflection air guide plate can rotate within the heat dissipation channel to adjust the flow direction of the fluid, thereby optimizing the flow channel of the fluid and improving the efficiency of temperature control.

[0053] In the above scheme of the present application, firstly, the lithium battery energy storage module includes a box body 1, in which a battery cell 2, a linear drive mechanism 4 and a fan 5 are arranged, and the linear drive mechanism 4 drives the fan 5 to move along a first direction. In this way, when the battery cell 2 far away from the fan 5 has a high heat generation, the fan 5 can be driven by the linear drive mechanism 4 to move to a position close to the battery cell 2, thereby shortening the distance between the battery cell 2 and the fan 5, so that the air-cooled fluid generated by the fan 5 can quickly reach the area where the battery cell 2 is located, thereby quickly cooling down the battery cell 2 with a high heat generation, avoiding the battery cell 2 being easily affected in a high temperature environment for a long time, thereby improving the service life of the battery cell 2, and further improving the service life of the lithium battery energy storage module.

[0054] Secondly, the lithium battery energy storage module also includes a switch structure 3, which includes a first rocker arm 31, a first connecting rod 32, a second rocker arm 33, a second connecting rod 34 and a slider 35. The side panel 12 of the box body 1 is provided with a first through hole, a second through hole and a slide groove 121. The first connecting rod 32 is inserted into the second through hole, one end of the first connecting rod 32 extends into the box body 1 and is connected to the first rocker arm 31, and the other end extends out of the box body 1 and is fixedly connected to the second rocker arm 33. One end of the second connecting rod 34 is rotatably connected to the second rocker arm 33, and the other end is rotatably connected to the slider 35. The slider 35 is slidably arranged in the slide groove 121. In this way, by controlling the rotation of the first rocker 31, the slider 35 can be controlled to slide in the slide groove 121, so that the third perforation on the slider 35 can be connected or staggered with the first perforation on the side plate 12. When the third perforation and the first perforation are connected, the external cold source fluid or heat source fluid can flow through the third perforation and the first perforation into the box body 1 for temperature adjustment, so as to avoid the battery cell 2 in the box body 1 from being affected by being too high or too low in temperature; when the third perforation and the first perforation are staggered, the external cold source fluid or heat source fluid cannot flow into the box body 1, so as to avoid the external cold source fluid or heat source fluid from affecting the temperature balance of the battery cell 2 in the box body 1. Since the above-mentioned switch structure 3 of the present application has the advantages of simple structure, low cost and high reliability, the switch structure 3 is more convenient to install and use, thereby improving the convenience of use and service life of the lithium battery energy storage module.

[0055] Furthermore, in the switch structure 3 of the present application, the push rod 6 and the first rocker 31 are sequentially arranged along the first direction. When the linear drive mechanism 4 drives the push rod 6 to move, the push rod 6 touches the first rocker 31 and applies a force to the first rocker 31 to rotate the first rocker 31, thereby making the third perforation conductive or staggered with the first perforation. In this way, the switch structure 3 does not need to be additionally provided with a controller to independently control the rotation of the first rocker 31 to realize the opening or closing of the switch structure 3, thereby further simplifying the structure of the lithium battery energy storage module, making the lithium battery energy storage module more convenient to install and use; at the same time, since the participation of electronic components such as the controller is reduced, the electronic components are prevented from being easily damaged and affecting the service life of the switch structure 3, thereby further improving the service life of the lithium battery energy storage module.

[0056] In addition, after the external cold source fluid or the heat source fluid flows into the box body 1 through the third perforation and the first perforation, the fan 5 can guide the fluid to flow quickly to the area of ​​temperature imbalance, so as to quickly adjust the temperature of the battery cell 2, thereby avoiding the battery cell 2 being in a high or low temperature environment for a long time, which may affect the service life of the battery cell 2, thereby improving the service life of the battery cell 2.

[0057] In some embodiments of the present application, Figure 4 , Figure 5 , Figure 6 , Figure 7 as well as Figure 8 As shown, the lithium battery energy storage module also includes a ratchet 7 and a pawl 8; a through hole is provided on the first rocker 31, one end of the first connecting rod 32 is inserted into the through hole and matches with the through hole gap, the ratchet 7 is sleeved on the outside of the first connecting rod 32 and is fixedly connected to the first connecting rod 32, and the outer periphery of the ratchet 7 has a card slot 71; the pawl 8 includes a base 81, a claw 82 and a spring 83, the base 81 is fixedly connected to the first rocker 31, the claw 82 is slidably connected to the base 81, and the spring 83 is arranged between the claw 82 and the base 81; the first rocker 3 When the first rocker 31 rotates along the second direction, the claw 82 is engaged in the slot 71, and the first rocker 31 drives the ratchet 7 to rotate along the second direction through the claw 82. When the ratchet 7 rotates, the first connecting rod 32 is driven to rotate along the second direction; when the first rocker 31 rotates along the third direction, the first rocker 31 drives the ratchet 8 to rotate, and the claw 82 of the ratchet 8 slides and contracts relative to the base 81 in a direction away from the axis of the ratchet 7, and compresses the spring 83, and the claw 82 slides over the ratchet 7 along the circumference of the ratchet 7, and the ratchet 7 does not rotate; the second direction and the third direction are opposite.

[0058] It is understandable that when the first rocker 31 and the first connecting rod 32 are connected through the ratchet 7 and the pawl 8, when the first rocker 31 rotates in the second direction, the pawl 8 and the ratchet 7 are engaged and positioned, the first rocker 31 drives the pawl 8 to rotate, the pawl 82 of the pawl 8 drives the ratchet 7 to rotate, and the ratchet 7 drives the first connecting rod 32 to rotate, so that the first rocker 31 can drive the first connecting rod 32 to rotate. When the first rocker 31 rotates in the third direction, due to the engagement and positioning between the pawl 82 and the ratchet 7, the pawl 82 will slide over the ratchet 7 along the circumference of the ratchet 7, so that the first rocker 31 drives the pawl 8 to rotate, the pawl 8 slides over the outer circumference of the ratchet 7, and the ratchet 7 does not rotate, thereby making the first connecting rod 32 not rotate, so that when the first rocker 31 rotates in the third direction, the first connecting rod 32 does not rotate, and the second rocker 33, the second connecting rod 34 and the slider 35 do not move. In this way, when the linear drive mechanism 4 drives the push rod 6 to move in the first direction and touch the first rocker 31, the push rod 6 pushes the first rocker 31 to rotate, the claw 82 of the pawl 8 is engaged and positioned with the ratchet wheel 7, and the first connecting rod 32, the second rocker 33, the second connecting rod 34 and the slider 35 move successively, so that the third through hole on the slider 35 and the first through hole on the side plate 12 are connected. When the linear drive mechanism 4 drives the push rod 6 to move in the direction opposite to the first direction and touch the first rocker 31, the push rod 6 pushes the first rocker 31 to rotate, the first rocker 31 drives the pawl 8 to rotate, the claw 82 of the pawl 8 slides over the ratchet wheel 7 along the circumference of the ratchet wheel 7, the ratchet wheel 7 does not rotate, and the first connecting rod 32, the second rocker 33, the second connecting rod 34 and the slider 35 do not rotate. Thereby, when the linear drive mechanism 4 drives the push rod 6 to move in the first direction and touch the first rocker 31, it can drive the slider 35 to move to start the switch structure 3. When the linear drive mechanism 4 drives the push rod 6 to move in the opposite direction to the first direction and touch the first rocker 31, it will not drive the slider 35 to move, so as to avoid that when the linear drive mechanism 4 drives the push rod 6 to retreat, the push rod 6 pushes the first rocker 31 to rotate in the opposite direction and drives the slider 35 to move in the opposite direction, causing the slider 35 to slip out of the slide groove 121 and be damaged, thereby ensuring that the switch structure 3 can be opened and closed normally.

[0059] In some embodiments of the present application, Figure 4 shows a schematic diagram when the switch structure 3 is in an open state, Figure 5 FIG. 3 is a schematic diagram showing a switch structure 3 in an initial state.

[0060] In some embodiments of this application, see Figure 6 , the second direction is Figure 6 The direction y in the middle is the counterclockwise rotation direction of the ratchet 7; the third direction is Figure 6 The direction z in the figure is the clockwise rotation direction of the ratchet wheel 7.

[0061] In some embodiments of this application, see Figures 6 to 8 The base 81 includes a fixedly connected connecting plate 811 and a boss 812, the connecting plate 811 is fixedly connected to the first rocker 31, and the boss 812 is provided with a first hole and a second hole in sequence along the radial direction of the ratchet 7 and in the direction away from the axis of the ratchet 7, and the aperture of the first hole is larger than the aperture of the second hole; the claw 82 includes a clamping block 821, a sliding rod 822 and a stopper 823 connected in sequence, the sliding rod 822 passes through the first hole and the second hole in sequence, the spring 83 is arranged in the first hole and is located between the clamping block 821 and the bottom surface of the first hole, the stopper 823 is limitedly matched with the surface of the boss 812 away from the ratchet 7, and the clamping block 821 is clamped in the clamping groove 71.

[0062] It is understandable that when the first rocker 31 drives the pawl 8 to rotate along the third direction, the claw 82 drives the slide bar 822 to slide along the axis direction of the first hole and the second hole, so that the claw 82 can move in a direction away from the axis of the ratchet 7, so that the claw 82 can be separated from the slot 71 on the ratchet 7 and slide over the outer periphery of the ratchet 7, ensuring that the claw 82 does not drive the ratchet 7 to rotate. The stopper 823 and the surface of the boss 812 away from the ratchet 7 can prevent the slide bar 822 from being separated from the first hole and the second hole, and the cooperation between the spring 83 and the stopper 823 can improve the stability of the claw 82.

[0063] In some embodiments of this application, see Figure 7 and Figure 8 The claw 82 also includes a limiting rod 824, and a limiting groove 8121 is also provided on the surface of the boss 812 away from the ratchet 7. The limiting rod 824 is fixedly connected to the stop block 823 and is limitedly fitted in the limiting groove 8121; there are multiple limiting grooves 8121, and the multiple limiting grooves 8121 are distributed at intervals along the circumference of the sliding rod 822, and the spacing between any pair of adjacent limiting grooves 8121 is equal.

[0064] It can be understood that the above-mentioned pawl 8 is a reversible pawl, that is, the orientation of the block 821 in the pawl 82 can be changed by rotating the block 823, so that when the first rocker arm 31 drives the pawl 8 to rotate along the second direction, due to the change in the orientation of the block 821, the pawl 82 will slide over the ratchet 7, and the ratchet 7 will not rotate, thereby causing the first rocker arm 31 to idle; when the first rocker arm 31 drives the pawl 8 to rotate along the third direction, due to the change in the orientation of the block 821, the pawl 82 will be engaged in the slot 71 of the ratchet 7 to drive the ratchet 7 to rotate, thereby enabling the first rocker arm 31 to drive the first connecting rod 32, the second rocker arm 33, the second connecting rod 34 and the slider 35 to move in sequence. In this way, when the linear drive mechanism 4 drives the push rod 6 to move in the first direction, the push rod 6 pushes the first rocker 31 to idle, the slider 35 does not move, and the external cold source fluid and the heat source fluid will not be introduced into the box body 1. At this time, the fan 5 can be controlled to move to the specified position for air cooling, without the participation of the external cold source fluid. In addition, when the linear drive mechanism 4 drives the push rod 6 to move in the direction opposite to the first direction, the first rocker 31 rotates in the opposite direction and drives the slider 35 to slide in the opposite direction. At this time, due to the reverse sliding of the slider 35, the third perforation on the slider 35 will not be connected with the first perforation on the side plate 12, and then after the block 821 on the claw 82 is reversed, when the linear drive mechanism 4 drives the push rod 6 to move, it will not drive the third perforation on the slider 35 to be connected with the first perforation on the side plate 12, so that the ratchet 8 is in this state, and only the fan 5 can be used for air cooling in the box body 1, which is suitable for the scene where the battery temperature in the box body 1 changes little, and avoids the temperature of the external cold source fluid being too low to affect the temperature balance in the box body 1. In addition, the locking fit between the limiting rod 824 and the limiting groove 8121 can improve the stability of the clamping block 821 and prevent the clamping block 821 from deviating and affecting the normal movement of the switch structure 3.

[0065] In some embodiments of the present application, the shape of the block 821 along the cross section perpendicular to the axis of the ratchet 7 is a right triangle, and one of the right-angled sides of the right triangle faces the first hole. In this way, the hypotenuse of the right triangle faces the side wall of the slot 71, so that when the pawl 8 rotates along the third direction or the second direction, the inclined surface of the block 821 can slide over the ratchet 7 to achieve contraction, ensuring that the pawl 8 does not drive the ratchet 7 to rotate.

[0066] In some embodiments of this application, see Fig. 9The linear drive mechanism 4 includes a motor 41, a seat body 43 and a screw-nut mechanism. The motor 41 and the seat body 43 are fixedly connected to the box body 1. The screw-nut mechanism includes a screw rod 44 and a slide 45 sleeved on the screw rod 44. The screw rod 44 is rotatably connected to the seat body 43. The motor 41 is transmission-connected to the screw rod 44. The screw rod 44 is arranged along the first direction. The fan 5 and the push rod 6 are both connected to the slide 45; the motor 41 drives the screw rod 44 to rotate relative to the seat body 43. When the screw rod 44 rotates, it drives the slide 45 to move along the length direction of the screw rod 44. When the slide 45 moves, it drives the fan 5 and the push rod 6 to move simultaneously along the first direction.

[0067] It can be understood that the motor 41 drives the screw rod 44 to rotate, and when the screw rod 44 rotates, it drives the slide 45 to move along the length direction of the screw rod 44, thereby driving the fan 5 and the push rod 6 to move simultaneously along the first direction, so that the fan 5 can move to a position close to the battery cell 2 with abnormal temperature, so that the push rod 6 can push the first rocker 31 to rotate, thereby driving the third perforation on the slider 35 to be connected with the first perforation on the side plate 12, and the external cold source fluid or heat source fluid can flow into the box body 1 through the third perforation and the first perforation, and the fan 5 can guide the cold source fluid or the heat source fluid to flow quickly to the area where the battery cell 2 with abnormal temperature is located, thereby being able to quickly regulate the temperature of the battery cell 2, avoiding the battery cell 2 being easily affected when the battery cell 2 is in a low temperature or high temperature environment for a long time, thereby being able to increase the service life of the battery cell 2, and thereby being able to increase the service life of the battery cell 2, and thereby being able to increase the service life of the lithium battery energy storage module.

[0068] 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 44, an internal thread is provided in the slider 35, and a ball is provided between the external thread and the internal thread, so that when the screw 44 rotates, the slide 45 can be driven to move along the length direction of the screw 44. When the screw nut mechanism is a sliding screw nut mechanism, an external thread is provided on the outer surface of the screw 44, an internal thread is provided in the slide 45, and the external thread and the internal thread are threadedly matched, so that when the screw 44 rotates, the slide 45 can be driven to move along the length direction of the screw 44.

[0069] In some embodiments of the present application, Figure 3 and Fig. 9 As shown, a coupling and a reducer 42 are further provided between the motor 41 and the screw rod 44. The motor shaft of the motor 41, the reducer 42, the coupling and the screw rod 44 are connected in sequence, so that the screw rod 44 can be driven to rotate when the motor 41 rotates. The reducer 42 can be a gear reducer.

[0070] In some embodiments of the present application, the first perforation on the side panel 12 corresponds to the heat dissipation gap between two adjacent battery cells 2, so that when the cold source fluid and the heat source fluid flow into the box body 1 from the first perforation, they can flow directly to the heat dissipation gap, so that the fluid can quickly reach the area with abnormal temperature, thereby improving the temperature control rate.

[0071] In some embodiments of the present application, Figure 4 and Figure 5 As shown, the push rod 6 includes an intermediate rod 61 and a front push rod 62. The intermediate rod 61 is fixedly connected to the slide 45. One end of the front push rod 62 is connected to the intermediate rod 61, and the other end extends along the first direction. The length direction of the intermediate rod 61 is perpendicular to the axial direction of the screw rod 44 and parallel to the axial direction of the fan 5. In the initial state, the distance between the slider 35 and the first through-hole is equal to the length of the front push rod 62, and the first rocker arm 31 is in an inclined state. When the slide 45 drives the push rod 6 to move along the first direction and contacts the first rocker arm 31, the first rocker arm 31 abuts against the front end face of the push rod 6. The surface of the first rocker arm 31 abutting against the push rod 6 is an arc-shaped surface, and there is a gap between the block 821 and the slot 71 in the circumferential direction of the ratchet 7.

[0072] It is understandable that, when the distance between the slider 35 and the first perforation is equal to the length of the front push rod 62 in the initial state, when the fan 5 moves to the heat dissipation gap between two adjacent battery cells 2, it can correspond to the first perforation on the side plate 12, so that when the cold source fluid or the hot source fluid flows into the box body 1 from the first perforation, it can flow to the fan 5, and quickly flow to the temperature imbalance area under the traction of the fan 5, so that the temperature of the battery cell 2 can be quickly adjusted, and the service life of the battery cell 2 is easily affected when the battery cell 2 is in a high temperature or low temperature environment for a long time, thereby improving the service life of the battery cell 2. In addition, when the first rocker 31 is in a tilted state in the initial state, when the push rod 6 is separated from the first rocker 31, the first rocker 31 can be reset to the initial state by its own gravity. In addition, when the surface of the first rocker arm 31 that abuts the push rod 6 is an arc-shaped surface, it is convenient for the push rod 6 to push the first rocker arm 31 to rotate; when there is a gap between the block 821 and the slot 71 in the circumferential direction of the ratchet 7, during the process of the linear drive mechanism 4 driving the push rod 6 to retreat in the direction opposite to the first direction, after the first rocker arm 31 and the push rod 6 are disengaged, the end of the first rocker arm 31 away from the first connecting rod 32 can be rotated downward for a distance under the action of its own gravity, so that the push rod 6 can touch the end of the first rocker arm 31 away from the first connecting rod 32 when it moves in the first direction next time, ensuring that the push rod 6 can push the first rocker arm 31 to rotate.

[0073] In some embodiments of the present application, the initial state refers to a state when the push rod 6 does not promote the first rotation, that is, a state when the slider 35 does not slide.

[0074] In some embodiments of the present application, in the first direction, there are multiple switch structures 3, and the side plate 12 is provided with multiple first perforations, second perforations and slide grooves 121, and the multiple first perforations, second perforations and slide grooves 121 are respectively matched with multiple switch structures 3; in the first direction, there are at least three battery cells 2, and there are at least two heat dissipation gaps, and the multiple first perforations correspond to the at least two heat dissipation gaps. In this way, by controlling multiple fluid pipelines to transport cold source fluid or heat source fluid to different areas in the box body 1 through multiple switch structures 3, the temperature control rate of the battery cells 2 in the box body 1 can be further improved.

[0075] In some embodiments of the present application, the lithium battery energy storage module further includes a control device and at least two temperature sensors 9, and the at least two temperature sensors 9 are distributed in different areas of the box body 1 to detect the temperature values ​​of different areas of the box body 1; the control device is used to control the linear drive mechanism 4 to drive the movement of the fan 5 and the speed of the fan 5 based on the setting position and detection value of the temperature sensor 9. In this way, the temperature sensor 9 detects the battery cell 2 with abnormal temperature, and the control device controls the linear drive mechanism 4 to drive the movement position of the fan 5 and the push rod 6 according to the setting position and detection value of the temperature sensor 9, which can not only improve the overall automation of the cooling component and the convenience of operation, but also improve the accuracy of the movement of the fan 5 and the push rod 6, so that the fan 5 can accurately face the area where the battery cell 2 with higher heat generation is located, and after the push rod 6 pushes the first rocker 31 to rotate a certain angle, the third perforation on the slider 35 can correspond to the first perforation on the side plate 12, thereby further improving the temperature control rate of the battery cell 2, and further improving the service life of the lithium battery energy storage module.

[0076] In some embodiments of the present application, Fig. 9 As shown, the battery cells 2 are arranged in an array of 6 rows and 4 columns, and a plurality of temperature sensors 9 are provided and arranged in an array of 6 rows and 4 columns. The plurality of temperature sensors 9 correspond one to one to the plurality of battery cells 2 .

[0077] Embodiment 2:

[0078] See also Fig.10 , an embodiment of the present invention provides a temperature control system for a lithium battery energy storage module, comprising at least two lithium battery energy storage modules as provided in any one of the above-mentioned embodiments 1, for example Fig.10A total of N lithium battery energy storage modules are shown, from the first lithium battery energy storage module to the Nth lithium battery energy storage module. Among them, an air outlet is provided on the box of the lithium battery energy storage module, a temperature sensor is provided in the box, and the temperature control system also includes an air compressor, a vortex tube, a control system and at least two fluid pipelines; the air compressor is connected to the air outlet, the vortex tube is connected to the air compressor, and a fluid pipeline is connected between each lithium battery energy storage module and the vortex tube, and one end of the fluid pipeline is connected to the third perforation of the slider of the lithium battery energy storage module; the control system is used to control the vortex tube to input a cold source fluid or a hot source fluid into the box through the fluid pipeline according to the detection value of the temperature sensor.

[0079] In the embodiment of the present application, the gas in each lithium battery energy storage module is absorbed by an air compressor, and compressed air is formed and input into the vortex tube. A cold source fluid or a hot source fluid is formed in the vortex tube, and then transported to each lithium battery energy storage module for temperature control, so that the above temperature control system can realize the recycling of fluid. In addition, a condenser can also be provided in the lithium battery energy storage module, and compressed gas is transported to the condenser by an air compressor, and the box is cooled by the condenser, which can further improve the heat dissipation performance of the lithium battery energy storage module.

[0080] 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.

[0081] 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.

[0082] 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.

[0083] 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.

[0084] 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 at least two battery cells arranged in the box, wherein a heat dissipation gap exists between two adjacent battery cells, characterized in that: It also includes a switch structure, a linear drive mechanism, a fan and a push rod; The box body comprises a side plate, a first through hole and a second through hole are provided on the side plate, a slide groove is provided on the surface of the side plate facing the outside of the box body, and one end opening of the first through hole is located in the slide groove; The switch structure includes a first rocker, a first connecting rod, a second rocker, a second connecting rod and a slider, wherein the first rocker is arranged inside the box body, and the second rocker is arranged outside the box body; The first connecting rod is inserted into the second through hole and is in gap fit with the second through hole. One end of the first connecting rod extends into the box and is connected to the first rocking rod. The other end of the first connecting rod extends out of the box and is fixedly connected to the second rocking rod. When the first rocking rod rotates, the second rocking rod is driven to rotate through the first connecting rod. One end of the second connecting rod is rotatably connected to the second rocking arm, and the other end is rotatably connected to the slider. The slider is slidably arranged in the slide groove, and a third through hole for communicating with a cold source pipeline or a hot source pipeline is provided on the slider. When the second rocking arm rotates, the slider is driven by the second connecting rod to slide in the slide groove, so that the third through hole and the first through hole are connected or staggered. The fan and the push rod are both connected to the linear drive mechanism. The fan is arranged opposite to the battery cell or the heat dissipation gap. The linear drive mechanism is used to drive the fan and the push rod to move simultaneously along a first direction. The push rod and the first rocker arm are arranged sequentially along the first direction. When the linear drive mechanism drives the push rod to move, the push rod touches the first rocker arm and applies a force to the first rocker arm to rotate the first rocker arm. The first direction is the arrangement direction of at least two of the battery cells.

2. The lithium battery energy storage module according to claim 1, characterized in that: Also includes ratchet and pawl; The first rocker is provided with a through hole, one end of the first connecting rod is inserted into the through hole and is in gap fit with the through hole, the ratchet is sleeved on the outside of the first connecting rod and is fixedly connected to the first connecting rod, and the outer periphery of the ratchet has a card slot; The pawl comprises a base, a claw and a spring, the base is fixedly connected to the first rocker, the claw is slidably connected to the base, and the spring is arranged between the claw and the base; When the first rocker arm rotates in the second direction, the claw is engaged in the slot, and the first rocker arm drives the ratchet wheel to rotate in the second direction through the claw, and the ratchet wheel drives the first connecting rod to rotate in the second direction when rotating; When the first rocker arm rotates along the third direction, the first rocker arm drives the claw to rotate, the claw slides and contracts relative to the base in a direction away from the axis of the ratchet wheel, and compresses the spring, the claw slides over the ratchet wheel along the circumference of the ratchet wheel, and the ratchet wheel does not rotate; The second direction and the third direction are opposite to each other.

3. The lithium battery energy storage module according to claim 2, characterized in that: The base comprises a fixedly connected connecting plate and a boss, the connecting plate is fixedly connected to the first rocker, a first hole and a second hole are sequentially provided in the boss along the radial direction of the ratchet and in a direction away from the axis of the ratchet, and the aperture of the first hole is larger than the aperture of the second hole; The claw includes a clamping block, a sliding rod and a stopper connected in sequence, the sliding rod passes through the first hole and the second hole in sequence, the spring is arranged in the first hole and is located between the clamping block and the bottom surface of the first hole, the stopper is limitedly engaged with the surface of the boss away from the ratchet, and the clamping block is clamped in the clamping slot.

4. The lithium battery energy storage module according to claim 3, characterized in that: The clamping claw further comprises a limiting rod, and a limiting groove is further provided on the surface of the boss away from the ratchet wheel, and the limiting rod is fixedly connected to the stopper and limitedly matched in the limiting groove; There are a plurality of the limiting grooves, and the plurality of limiting grooves are distributed at intervals along the circumference of the slide bar, and the spacing between any pair of adjacent two limiting grooves is equal.

5. The lithium battery energy storage module according to claim 3, characterized in that: The shape of the block along a cross section perpendicular to the ratchet axis is a right triangle, and one of the right-angled sides of the right triangle faces the first hole.

6. The lithium battery energy storage module according to claim 3, 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, the screw-nut mechanism comprises a screw and a slide 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 first direction, and the fan and the push rod are both connected to the slide; The motor drives the screw rod to rotate relative to the base. When the screw rod rotates, the slide table is driven to move along the length direction of the screw rod. When the slide table moves, the fan and the push rod are driven to move simultaneously along the first direction.

7. The lithium battery energy storage module according to claim 6, characterized in that: The push rod comprises an intermediate rod and a front push rod, wherein the intermediate rod is fixedly connected to the slide, one end of the front push rod is connected to the intermediate rod, and the other end extends along the first direction, and the length direction of the intermediate rod is perpendicular to the axial direction of the screw rod and parallel to the axial direction of the fan; In an initial state, the distance between the slider and the first through hole is equal to the length of the front push rod, and the first rocker is in a tilted state; When the slide drives the push rod to move in the first direction and contacts the first rocker arm, the first rocker arm abuts against the front end surface of the push rod, the surface of the first rocker arm abutting against the push rod is an arc-shaped surface, and there is a gap between the block and the slot in the circumferential direction of the ratchet.

8. The lithium battery energy storage module according to any one of claims 1 to 7, characterized in that: In the first direction, the switch structure is provided in plurality, the side plate is provided with a plurality of first through holes, second through holes and slide grooves, and the plurality of first through holes, second through holes and slide grooves are respectively matched with the plurality of switch structures; In the first direction, there are at least three battery cells, there are at least two heat dissipation gaps, and the first through holes correspond to the at least two heat dissipation gaps respectively.

9. The lithium battery energy storage module according to claim 8, characterized in that: It also includes a control device and at least two temperature sensors, wherein the at least two 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 movement of the fan and control the rotation speed of the fan based on the setting position and detection value of the temperature sensor.

10. A temperature control system for a lithium battery energy storage module, characterized in that: Comprising at least two lithium battery energy storage modules as described in any one of claims 1 to 9, the box of the lithium battery energy storage module is provided with an air outlet, the box is provided with a temperature sensor, and the temperature control system further comprises an air compressor, a vortex tube, a control system and at least two fluid pipelines; The air compressor is connected to the air outlet, the vortex tube is connected to the air compressor, a fluid pipeline is connected between each of the lithium battery energy storage modules and the vortex tube, and one end of the fluid pipeline is connected to the third through hole of the slider of the lithium battery energy storage module; The control system is used to control the vortex tube to input cold source fluid or hot source fluid into the box through the fluid pipeline according to the detection value of the temperature sensor.

Images