Temperature control device for power battery pack

Abstract

The invention discloses a power battery pack temperature control device which comprises a battery bin provided with a plurality of power battery pack slots and a heat exchange plate covering one side of the slots, the heat exchange plate is in sliding connection with the battery bin through a plurality of guide columns, and the two ends of each guide column are fixedly connected with a movable frame and the heat exchange plate respectively. The guide columns are sleeved with springs pushing the movable frame to reset. The battery bin is provided with a pressing structure and a beam body which is driven by the pressing structure to move towards the movable frame, a pressure buffering gasket is arranged between the beam body and the movable frame, and when the beam body is close to the movable frame, the pressure buffering gasket is pressed to deform. According to the device, by arranging the temperature control assembly capable of relatively ascending and descending, under the condition that the temperature of the battery packs is ensured to be controlled, the battery packs can be conveniently subjected to plugging and battery replacement operation, and meanwhile, multi-azimuth structural design is carried out according to the requirement for tight attachment between the multiple battery packs and the heat exchange plate; and the effects of enhancing temperature control and avoiding excessive pressing of the battery pack are achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of battery pack temperature control equipment, and specifically relates to a power battery pack temperature control device. Background Art

[0002] Electric vehicles are the development direction of new energy vehicles, which use battery packs to store electrical energy as a power source to drive the vehicle. In order to ensure a certain total power and output voltage requirements, electric vehicles need to be equipped with a certain number of battery packs, and the battery packs are connected through copper bars to form battery modules. In order to improve the safety of the battery pack, the battery module is encapsulated in a shell to form a battery pack. The charging and discharging heat of the battery module causes the battery pack temperature to rise. Excessive temperature will have an adverse effect on the performance and service life of the battery, and may even cause thermal runaway and endanger personal safety. Therefore, the battery pack in use must be cooled and cooled. At the same time, in areas with lower temperatures, the battery pack has a lower charging efficiency when the temperature is lower, so the battery pack needs to be preheated in advance to ensure that it has better charging efficiency and achieves a fast charging effect. Therefore, it is necessary to add temperature control devices to the battery bottom compartment, battery exchange cabinet and other facilities where the battery pack is placed and needs to be charged and discharged.

[0003] Current battery pack temperature control devices, such as a passive heat dissipation battery pack lower box disclosed in Patent No. 202210958134.9, use a water cooling plate to dissipate heat for the battery pack. The position of the water cooling plate is fixed. In order to ensure the heat dissipation performance, the water cooling plate needs to be tightly fitted to the battery pack. However, this solution is not suitable for battery-swap new energy vehicles, because battery-swap new energy vehicles need to plug and unplug the battery pack when replenishing energy. When the battery pack is tightly fitted to the water cooling plate, the battery pack is difficult to plug and unplug, and may even be damaged and deformed during the plug-in and unplugging process. Therefore, targeted improved designs are needed. Summary of the invention

[0004] The purpose of the present invention is to provide a power battery pack temperature control device for use, so as to solve the problem that the water cooling plate is fixed in position and keeps in close contact with the battery pack, which makes it inconvenient to plug and unplug the battery. In addition, the problem of using a movable water cooling plate to control the temperature in this case is solved to ensure that multiple battery packs can be pressed against the water cooling plate at the same time.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a power battery pack temperature control device, comprising a battery compartment provided with a plurality of power battery pack slots and a heat exchange plate covering one side of the slots, the heat exchange plate being slidably connected to the battery compartment through a plurality of guide pillars, the two ends of the guide pillars being respectively fixedly connected to a movable frame and the heat exchange plate, and the guide pillars being sleeved with a spring for pushing the movable frame to reset; a clamping structure and a beam body driven by the clamping structure to move toward the movable frame are provided on the battery compartment, a pressure-relieving gasket is provided between the beam body and the movable frame, and when the beam body and the movable frame are close to each other, the pressure-relieving gasket is compressed and deformed.

[0006] Preferably, the clamping structure includes a linear drive unit fixedly mounted on the battery compartment, a drive rod driven to translate by the linear drive unit, and a rod mounted on the beam body;

[0007] The side surface on which the driving rod and the rod member are in relative sliding contact is arranged as an inclined surface, and when the rod member is in translation, the rod member always keeps in contact with the inclined surface.

[0008] Preferably, the rod is rotatably mounted on the beam body via a connecting seat, and when the rod is translated, the rod rolls along the inclined surface.

[0009] Preferably, movable frames are correspondingly arranged at both ends of each beam body, and the two movable frames are symmetrically arranged with the pressure part of the clamping mechanism on the beam body.

[0010] Preferably, the movable frame is in an I-shape, and the force application point of the beam body on the movable frame is located in the middle of the longitudinal rod of the movable frame;

[0011] The guide pillars are symmetrically arranged on the heat exchange plate, and both ends of the crossbar of the movable frame are respectively fixedly connected to the symmetrical guide pillars.

[0012] Preferably, a guide seat with a guide groove in the middle is fixedly mounted on the movable frame, the beam body is slidably connected to the guide seat through the guide groove, the guide groove is consistent with the width of the beam body, and a pressure-reducing gasket is arranged at the bottom of the guide groove.

[0013] Preferably, bolts are relatively vertically fixedly installed on the beam body, and the other ends of the bolts pass through the holes reserved on the pressure-reducing gasket, the guide seat and the movable frame in sequence.

[0014] Preferably, a scraper is provided on the edge of the slot inlet close to the heat exchange plate.

[0015] Preferably, the heat exchange plate is a plate with a flow channel arranged inside, and the water outlet and water inlet of the internal flow channel are respectively connected to the main pipeline on the battery compartment through a hose to form a circulating water circuit.

[0016] Preferably, the pressure relief gasket is in the shape of a truncated cone and has a height of 10-15 mm.

[0017] The technical effects and advantages of the present invention are as follows: the power battery pack temperature control device,

[0018] 1. The heat exchange plate is driven to move up and down in the slot of the battery compartment through the return spring and the downward pressure mechanism to ensure smooth and convenient insertion and removal of the battery pack, avoiding friction damage to the heat exchange plate due to repeated insertion and removal.

[0019] 2. In addition, it effectively solves the problem that when multiple heat exchange plates are driven to stick to the corresponding battery packs at the same time, the degree of fit between the battery packs and the heat exchange plates in some positions is quite different;

[0020] First, the structure of the pressing mechanism is designed. The inclined surface and the rod are used to drive the beam to press down smoothly. On the one hand, it can prevent the heat exchange plate from impacting the battery pack and causing damage due to excessive downward pressure. On the other hand, the beam is pressed down smoothly, and the output pressure is greater. The movable frame drives the heat exchange plate to descend relatively smoothly along the guide column, which can avoid the heat exchange plate from tilting and jamming, and completely cover the surface of the battery pack.

[0021] The beam and the movable frame are set to a separate structure. When the beam is pressed down onto the movable frame, the downward pressure of the beam is supported and absorbed by the deformation of the pressure relief gasket, so as to prevent the movable frame from outputting excessive rigid pressure to the battery pack and causing hard damage. This allows the clamping mechanism to output greater pressure to ensure that the heat exchange plate at each position fits the battery pack, without causing excessive pressure at some positions to damage the battery pack;

[0022] Optimize the structure of the movable frame and the position where the beam applies force to the movable frame, so as to better balance the pressure output by the downward pressure mechanism. The downward pressure of each heat exchange plate is relatively uniform, further ensuring that the heat exchange plate at each position fits tightly with the battery pack and the pressure is moderate.

[0023] In addition, a scraper is provided at the entrance of the battery compartment slot to remove debris and dust on the contact surface between the battery pack and the heat exchange plate, thereby preventing the heat exchange plate and the battery pack from being blocked by debris and affecting the heat exchange.

[0024] 3. The temperature control board, pipes, water pumps and other temperature control equipment are installed at the bottom of the vehicle body, instead of the design of relatively fixing the temperature control board on the battery pack and separating it from the pipes. This avoids the impact pressure problem caused by the need to connect the pipes every time when replacing the battery, and ensures the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the present invention;

[0026] Figure 2 for Figure 1 A partial enlarged view of the middle A;

[0027] Figure 3 It is a schematic diagram of the coordination between the beam body and the movable frame;

[0028] Figure 4 for Figure 3 A partial enlarged view of point B in the middle;

[0029] Figure 5 It is a structural schematic diagram of the clamping mechanism;

[0030] Figure 6 for Figure 5 A partial enlarged view of point C in the middle;

[0031] Figure 7Schematic diagram of the cooperation between the driving rod and the beam body.

[0032] In the figure: 1. slot; 2. battery compartment; 3. heat exchange plate;

[0033] 4. Compression structure; 410. Linear drive unit; 420. Drive rod;

[0034] 5. movable frame; 510. horizontal bar; 520. vertical bar;

[0035] 6. Guide column; 7. Spring; 8. Beam; 9. Pressure relief gasket; 10. Rod;

[0036] 11. Inclined surface; 12. Connecting seat; 13. Guide seat; 14. Guide groove; 15. Bolt; 16. Scraper; 17. Hose. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] The present invention provides Figure 1-7 A power battery pack temperature control device shown includes a battery compartment 2 provided with a plurality of power battery pack slots 1 and a heat exchange plate 3 covering one side of the slots 1. After the heat exchange plate 3 is attached to the battery pack, heat exchange can be performed with the battery pack to achieve the effect of controlling the temperature of the battery pack. The degree of attachment between the battery pack surface and the heat exchange plate 3 affects the heat exchange efficiency.

[0039] The heat exchange plate 3 is slidably connected to the battery compartment 2 through a plurality of guide pillars 6. The two ends of the guide pillars 6 are fixedly connected to the movable frame 5 and the heat exchange plate 3 respectively, and a spring 7 is sleeved on the guide pillars 6 to push the movable frame 5 to reset. The battery compartment 2 is provided with a clamping structure 4 and a beam 8 driven by the clamping structure 4 to move toward the movable frame 5. A pressure-absorbing gasket 9 is provided between the beam 8 and the movable frame 5. When the beam 8 and the movable frame 5 are close, the pressure-absorbing gasket 9 is deformed under pressure. In order to facilitate the insertion and removal of the battery pack during the battery replacement operation, the heat exchange plate 3 is designed with a movable structure. The heat exchange plate 3 has the following two working states;

[0040] First, when the battery pack is located inside the slot 1 of the battery compartment 2, in order to control the temperature of the battery pack, the heat exchange plate 3 needs to be closely attached to the surface of the battery pack. At this time, the beam 8 is pushed down by the clamping structure 4, and the beam 8 presses the movable frame 5, and the movable frame 5 drives the heat exchange plate 3 to move synchronously and slides horizontally along the multiple guide pillars 6 toward the slot 1 until it is attached to the surface of the battery pack. At this time, the water cooling plate is in a state of attachment to the surface of the battery pack and exchanges heat with the battery pack;

[0041] Secondly, when the battery pack needs to be pulled out from the slot 1, the clamping mechanism releases the downward driving force on the beam body 8, thereby simultaneously releasing the pressure of the beam body 8 on the movable frame 5. And because the movable frame 5 moves along the guide column 6, the spring 7 sleeved on the guide column 6 is pressed and deformed. When the pressure on the movable frame 5 disappears, the restoring force of the spring 7 pushes the movable frame 5 to reset. The movable frame 5 drives the heat exchange plate 3 to move synchronously, and at this time the heat exchange plate 3 is in a separated state from the surface of the battery pack. This ensures that the heat exchange plate 3 will not generate resistance to the battery pack when the battery pack is pulled out. The process of plugging and unplugging the battery pack is more convenient, avoiding friction damage between the battery pack and the heat exchange plate 3.

[0042] By designing the heat exchange plate 3 with a movable structure, it is convenient to plug and unplug the battery pack during the power exchange process. In actual applications, a battery compartment 2 is provided with multiple slots 1 for battery packs. When driving each heat exchange plate 3 to fit against the corresponding battery pack, the difference in pressure on the heat exchange plates 3 at various positions in the battery compartment, the error in the assembly of the heat exchange plates 3, and the possible offset of the lifting and lowering of the heat exchange plates 3 can easily cause the heat exchange plates 3 at some positions to fail to fit tightly against the battery pack. Although the pressure output by the clamping mechanism can be continuously increased to ensure that there is sufficient fitting pressure between all heat exchange plates 3 and the battery pack, some positions may cause excessive pressure on the battery pack, which can easily cause damage. Therefore, it is necessary to design the movement guide and clamping mechanism of the heat exchange plate 3 to ensure that the heat exchange plates at various positions in the battery compartment exert moderate pressure on the battery pack and fit tightly.

[0043] like Figure 5-7As shown, the clamping structure 4 in this case includes a linear drive unit 410 fixedly mounted on the battery compartment 2 (a structure such as an electric push rod can be used to provide a linear driving force), the output end of the linear drive unit 410 is fixedly connected to the drive rod 420 through a connecting assembly, and the linear drive unit 410 and the drive rod 420 are horizontally placed above the battery compartment 2 and remain relatively parallel to the upper surface of the battery compartment 2. A rod 10 is installed on the beam body 8. The side of the drive rod 420 that is in relative sliding contact with the rod 10 is set as an inclined surface 11, and when the rod 10 is translated, the rod 10 always remains in contact with the inclined surface 11. When the linear drive mechanism pushes the driving rod 420 to translate above the battery compartment 2, the rod 10 slides along the inclined surface 11. Since the driving rod 420 is horizontally placed above the battery compartment 2, there is a height difference in the longitudinal direction. The rod 10 slides from the high point of the inclined surface 11 to the low point of the inclined surface 11. At this time, the rod 10 is displaced in the longitudinal direction and descends, thereby driving the beam body 8 to synchronously descend to press the movable frame 5 below. The clamping mechanism 4 has a more linear and gentle pressure output, which can avoid the instantaneous driving of the beam body 8 to press down, causing the movable frame 5 to drive the heat exchange plate 3 to impact the surface of the battery pack. In addition, compared with directly using a linear mechanism to push the movable frame 5 and the heat exchange plate 3 downward, the downward driving force is more stable, and the heat exchange plate 3 is relatively smooth during the descent along the guide column 6, which can avoid jamming and tilting. This allows each heat exchange plate 3 to accurately descend to a position close to the battery pack and fit tightly with the surface of the battery pack;

[0044] like Figure 4 As shown, a pressure-relief gasket 9 is provided between the beam body 8 and the movable frame 5. When the beam body 8 and the movable frame 5 are close to each other, the pressure-relief gasket 9 is deformed by pressure. Compared with the traditional structure in which the beam body 8 and the movable frame 5 are relatively fixedly connected, and the movable frame 5 is directly driven to descend by the beam body 8, in this solution, when the beam body 8 is pressed down to the movable frame 5, the downward pressure of the beam body 8 is first absorbed and supported by the pressure-relief gasket 9, so as to prevent the movable frame 5 from outputting excessive rigid pressure to the battery pack and causing hard damage. This allows the clamping mechanism to output greater pressure to ensure that the heat exchange plate 3 at each position fits the battery pack without causing excessive pressure on the battery pack at some positions.

[0045] The rod 10 is rotatably mounted on the beam 8 through the connecting seat 12. When the rod 10 translates, the rod 10 rolls along the inclined surface 11. Compared with sliding along the inclined surface 11, the rod 10 rolls along the inclined surface 11, which has smaller friction, thereby ensuring the service life of the rod 10 and reducing the failure rate.

[0046] like Figure 5As shown, a movable frame 5 is correspondingly arranged at both ends of each beam 8, and the two movable frames 5 are arranged symmetrically with the pressure part of the clamping mechanism on the beam 8. The movable frame 5 is in an I-shape, and the two ends of the longitudinal rod 520 are respectively fixedly connected to the middle of the cross rod 510, and the force application point of the beam 8 on the movable frame 5 is located in the middle of the longitudinal rod 520; the guide column 6 is symmetrically arranged on the heat exchange plate 3, and the two ends of the cross rod 510 are respectively fixedly connected to the symmetrical guide columns 6. The downward pressure output by the downward pressure mechanism is transmitted to the heat exchange plate 3 through the beam 8, the longitudinal rod 520 of the movable frame 5, and the cross rod 510 of the movable frame 5 in sequence. Since the pressure part of the downward pressure mechanism on the beam 8 is in the middle of the beam 8, the two movable frames 5 pressed by the beam 8 are symmetrically arranged at both ends, and the force point of the movable frame 5 is in the middle of its longitudinal rod 520. Thereby, the pressure output by the pressing mechanism is better balanced, and the pressing force of each heat exchange plate 3 is relatively uniform, further ensuring that the heat exchange plate 3 at each position fits tightly with the battery pack and the pressure is moderate.

[0047] like Figure 3-4 As shown, a guide seat 13 with a guide groove 14 in the middle is fixedly installed on the movable frame 5, and the beam body 8 is slidably connected to the guide seat 13 through the guide groove 14. The guide groove 14 is consistent with the width of the beam body 8, and the pressure relief gasket 9 is arranged at the bottom of the guide groove 14. Bolts 15 are relatively vertically fixedly installed on the beam body 8, and the other end of the bolt 15 passes through the pressure relief gasket 9, the guide seat 13 and the reserved holes on the movable frame 5 in turn. In the process of the beam body 8 being driven down by the pressing mechanism, the beam body 8 is always lifted and lowered longitudinally through the guiding and limiting effects of the guide groove 14 and the bolt 15, so as to apply pressure in a direction vertical to the movable frame 5, thereby avoiding the problem of the heat exchange plate 3 being stuck or tilted due to the oblique force.

[0048] like Figure 1 As shown, a scraper 16 is provided at the edge of the slot 1 entrance near the heat exchange plate 3. When inserting the battery pack into the slot 1, the scraper 16 scrapes the upper end surface of the battery pack to remove dust or small debris, so that the subsequent heat exchange plate 3 and the battery pack surface are more closely attached.

[0049] The heat exchange plate 3 in this case is a plate with a flow channel arranged inside, and the water inlet and outlet of the internal flow channel are respectively connected to the main pipe on the battery compartment (2) through a hose (17) to form a circulating water circuit. The water pump circulates the hot medium or cold medium through the main pipe into the water cooling plate to heat or dissipate heat for the battery pack, and is connected to the main pipe through the hose 17, so as to ensure that the water cooling plate will not be restricted by the pipe during the lifting and lowering movement.

[0050] The pressure relief gasket 9 is truncated cone-shaped and has a height of 10-15 mm. When the beam 8 presses the movable frame 5, the pressure relief gasket 9 needs to be deformed under pressure to absorb the pressure. The truncated cone-shaped pressure relief gasket 9 is placed stably, deforms fully and quickly, and can efficiently absorb the pressure applied by the beam 8, preventing the movable frame 5 from outputting excessive rigid pressure to the battery pack and causing hard damage.

[0051] The temperature control device in this case can be applied to not only the bottom compartment of new energy electric vehicles or charging cabinets of battery swap stations, but also to any equipment used to store battery packs and perform charging and discharging operations on battery packs.

[0052] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0053] In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0054] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A power battery pack temperature control device, comprising a battery compartment (2) provided with a plurality of power battery pack slots (1) and a heat exchange plate (3) covering one side of the slots (1), characterized in that: The heat exchange plate (3) is slidably connected to the battery compartment (2) via a plurality of guide pillars (6), the two ends of the guide pillars (6) are respectively fixedly connected to the movable frame (5) and the heat exchange plate (3), and a spring (7) for pushing the movable frame (5) to return to its original position is sleeved on the guide pillars (6); The battery compartment (2) is provided with a clamping structure (4) and a beam body (8) driven by the clamping structure (4) to move toward the movable frame (5); a pressure-absorbing gasket (9) is provided between the beam body (8) and the movable frame (5); when the beam body (8) and the movable frame (5) are close to each other, the pressure-absorbing gasket (9) is deformed under pressure.

2. A power battery pack temperature control device according to claim 1, characterized in that: The clamping structure (4) comprises a linear drive unit (410) fixedly mounted on the battery compartment (2), a drive rod (420) driven to move in translation by the linear drive unit (410), and a rod member (10) mounted on the beam body (8); The side surface of the driving rod (420) in contact with the rod (10) is arranged as an inclined surface (11); when the rod (10) is in translation, the rod (10) and the inclined surface (11) move relative to each other and always remain in contact with the inclined surface (11).

3. A power battery pack temperature control device according to claim 2, characterized in that: The rod (10) is rotatably mounted on the beam body (8) via a connecting seat (12); when the rod (10) translates, the rod (10) rolls along the inclined surface (11).

4. A power battery pack temperature control device according to claim 1, characterized in that: A movable frame (5) is correspondingly arranged at both ends of each beam body (8), and the two movable frames (5) are arranged axially symmetrically with the pressure applying part of the clamping mechanism to the beam body (8).

5. A power battery pack temperature control device according to claim 1, characterized in that: The movable frame (5) is in an I-shape, and the force application point of the beam body (8) on the movable frame (5) is located in the middle of the longitudinal rod (520) of the movable frame (5); The guide pillars (6) are symmetrically arranged on the heat exchange plate (3), and both ends of the crossbar (510) of the movable frame (5) are respectively fixedly connected to the symmetrical guide pillars (6).

6. A power battery pack temperature control device according to claim 1, characterized in that: A guide seat (13) having a guide groove (14) in the middle is fixedly mounted on the movable frame (5); the beam body (8) is slidably connected to the guide seat (13) via the guide groove (14); the guide groove (14) and the beam body (8) have the same width; and the pressure-reducing gasket (9) is arranged at the bottom of the guide groove (14).

7. A power battery pack temperature control device according to claim 5, characterized in that: A bolt (15) is relatively vertically fixedly installed on the beam body (8), and the other end of the bolt (15) passes through the pressure-reducing gasket (9), the guide seat (13) and the reserved holes on the movable frame (5) in sequence.

8. A power battery pack temperature control device according to claim 1, characterized in that: A scraper (16) is provided at the edge of the slot (1) entrance close to the heat exchange plate (3).

9. A power battery pack temperature control device according to claim 1, characterized in that: The heat exchange plate (3) is a plate member with a flow channel arranged inside, and the water inlet and outlet of the internal flow channel are respectively connected to the main pipe on the battery compartment (2) through a hose (17) to form a circulating water circuit.

10. A power battery pack temperature control device according to any one of claims 1 to 9, characterized in that: The pressure-relief gasket (9) is in the shape of a truncated cone and has a height of 10-15 mm.

Images