Ejection device for battery pack and safety guarantee system

Abstract

One or more embodiments of this specification relate to a throwing device and a safety guarantee system for a battery pack. The throwing device includes: a track, on which bottom rollers are provided, and the bottom rollers carry the battery pack; a pushing component for pushing the battery pack along the track to throw the battery pack out from the first end of the track; a locking component for locking and unlocking the pushing component; and a power component for driving the pushing component to move along the track.

Description

Technical Field

[0001] This specification relates to the technical field of batteries, and particularly to a throwing device and a safety guarantee system for a battery pack. Background Art

[0002] With the large-scale popularization of electric vehicles, the requirements for the safety performance of the battery pack, which is a core component thereof, are getting higher and higher. When the battery pack is stored in a warehouse, an emergency such as thermal runaway or short circuit may occur inside the battery pack. If the faulty battery pack is not taken out and processed in time, it may cause damage to personal and property safety.

[0003] To solve the above problems, this specification provides a throwing device for a battery pack to ensure the safety of the battery pack in case of emergencies such as thermal runaway. Summary of the Invention

[0004] One embodiment of this specification provides a throwing device for a battery pack, including: a track, on which bottom rollers are provided, and the bottom rollers carry the battery pack; a pushing member for moving along the track to push the battery pack so as to throw the battery pack out from the first end of the track; a locking member for locking and unlocking the pushing member to restrict or allow the pushing member to move along the track; and a power member for driving the pushing member to move along the track.

[0005] One embodiment of this specification provides a safety guarantee system for a battery pack, including: the throwing device described in the foregoing embodiment; a water tank provided at the first end of the track; and a battery pack picking and placing device for transporting the battery pack to the track of the throwing device. Brief Description of the Drawings

[0006] This specification will be further described by way of exemplary embodiments, which will be described in detail through the drawings. These embodiments are not restrictive. In these embodiments, the same numbers represent the same structures, where:

[0007] Figure 1 is a schematic structural diagram of a battery pack placed on the throwing device according to some embodiments of this specification;

[0008] Figure 2 is a schematic structural diagram of a battery pack not placed on the throwing device according to some embodiments of this specification;

[0009] Figure 3 is Figure 2 a schematic structural diagram of the throwing device shown in another perspective;

[0010] Figure 4 is Figure 3 an enlarged schematic view of part A in

[0011] Figure 5 a schematic structural view of the ejection device according to some other embodiments of this specification;

[0012] Figure 6 a schematic module view of the safety guarantee system according to some other embodiments of this specification.

[0013] Reference numerals: ejection device 100; track 110; bottom roller 111; track bracket 112; pushing member 120; first push plate 121; second push plate 122; protrusion 123; locking member 130; unlocking rod 131; first abutting end 132; second abutting end 133; unlocking fixing member 134; first opening 135; second opening 136; power member 140; spring device 141; spring balancer 142; fixed pulley 143; first hook 144; second hook 145; guiding member 150; guiding rod 151; side roller 152; first side roller 1521; second side roller 1522; connecting rod 153; battery pack 200; safety guarantee system 300; water tank 400; battery pack access device 500. Detailed implementation manners

[0014] To more clearly illustrate the technical solutions of the embodiments of this specification, the accompanying drawings required for the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some examples or embodiments of this specification. For those of ordinary skill in the art, without creative efforts, this specification can also be applied to other similar scenarios based on these drawings. Unless obvious from the language context or otherwise stated, the same reference numerals in the drawings represent the same structure or operation.

[0015] As shown in this specification and the claims, unless the context clearly indicates an exception, words such as "a", "an", "one", and / or "the" are not specifically singular and may also include plural. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of the clearly identified steps and elements, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements.

[0016] This specification provides a throwing device for a battery pack. The throwing device may include a track, a pushing member, a locking member, and a power member. The power member may be drivingly connected to the pushing member to provide power for the movement of the pushing member. The locking member may unlock and lock the movement of the pushing member. When the locking member is in the unlocked position, the pushing member may move along the track. When the locking member is in the locked position, the locking member restricts the pushing member from moving along the track and the pushing member is stationary. The throwing device may be used to transport a battery pack placed on the track. For example, when an emergency such as thermal runaway occurs in the battery pack, the battery pack may be placed at the second end of the track and the locking member may be moved from the locked position to the unlocked position. At this time, the pushing member may push the battery pack along the track under the action of the power member, so as to transport the battery pack to the first end of the track, and the battery pack will be thrown out from the first end of the track due to inertia to achieve the transfer of the battery pack. In some cases, a battery pack that has undergone thermal runaway can be transferred in time through the throwing device. On the one hand, the battery pack that has undergone thermal runaway can be cooled in time to prevent the temperature of the battery pack from rising further. On the other hand, other battery packs in a normal state can also be protected to avoid losses to personal property.

[0017] In some embodiments, as shown in Figure 1 and Figure 2 , the throwing device 100 may include a track 110, a pushing member 120, a locking member 130, and a power member 140. The track 110 may be used to carry the battery pack 200, and the battery pack 200 can move along the track 110. The pushing member 120 may be used to push the battery pack 200 along the track 110 and throw the battery pack 200 out from the first end of the track 110. The locking member 130 may be used to lock and unlock the pushing member 120 to restrict or allow the pushing member to move along the track. Among them, the pushing member may be used to push the battery pack 200 to move along the length direction or the width direction of the track 110. In some embodiments, when the pushing member is used to push the battery pack 200 to move along the length direction of the track 110, the battery pack 200 can be thrown out from the first end in the length direction of the track 110. When the pushing member is used to push the battery pack 200 to move along the width direction of the track 110, the battery pack 200 can be thrown out from the first end in the width direction of the track 110. For the convenience of description, the width direction of the track 110 may be represented by the arrow Y in Figure 1 , the length direction of the track 110 may be represented by the arrow X in Figure 1 , and the height direction of the track 110 may be represented by Figure 1It is represented by the arrow Z in the figure. In other embodiments of this specification, unless otherwise specified, the pushing component is used to push the battery pack 200 to move along the length direction of the track 110, and the battery pack 200 can be thrown out from the first end in the length direction of the track 110.

[0018] In some embodiments, bottom rollers 111 may be provided on the track 110, and the bottom rollers 111 can be used to carry the battery pack 200. The bottom rollers 111 refer to the rollers that contact the bottom of the battery pack 200 to support the battery pack 200. Among them, the bottom of the battery pack 200 refers to the lower side of the battery pack 200 in the height direction of the track 110. In addition, the side part of the battery pack 200 refers to both sides of the battery pack 200 in the length direction or width direction of the track 110. For example, when the pushing component is used to push the battery pack 200 to move along the width direction of the track 110, the pushing component 120 can abut against one side of the battery pack 200 in the width direction of the track 110, so as to push the battery pack 200 to move. When the pushing component is used to push the battery pack 200 to move along the length direction of the track 110, the pushing component 120 can abut against one side of the battery pack 200 in the length direction of the track 110, so as to push the battery pack 200 to move. Only by way of example, the track 110 may include two spaced-apart track brackets 112. In the length direction of the track brackets 112 (i.e., the length direction of the track 110), several bottom rollers 111 are provided on each track bracket 112. The several bottom rollers 111 can rotate relative to the track brackets 112, and the rotation axes of the bottom rollers 111 are perpendicular to the length direction of the track brackets 112 (i.e., perpendicular to the length direction of the track 110). When the battery pack 200 is placed on the track 110, the bottom of the battery pack contacts the bottom rollers 111. In another example, when the pushing component is used to push the battery pack 200 to move along the width direction of the track 110, in the width direction of the track brackets 112 (i.e., the width direction of the track 110), several bottom rollers 111 are provided on each track bracket 112. The several bottom rollers 111 can rotate relative to the track brackets 112, and the rotation axes of the bottom rollers 111 are perpendicular to the width direction of the track brackets 112 (i.e., perpendicular to the length direction of the track 110).

[0019] In some cases, by providing the bottom rollers 111 on the track 110, when the battery pack 200 moves along the track 110, the bottom of the battery pack 200 can form a rolling contact with the bottom rollers 111, thereby reducing the frictional resistance suffered by the battery pack 200 during the movement and effectively improving the transportation efficiency of the battery pack 200.

[0020] In some embodiments, to increase the supporting ability of the track 110 for the battery pack, the number of bottom rollers 111 can be increased. For example, several bottom rollers 111 can include one or more columns, each column of bottom rollers 111 can extend along the length direction of the track 110, multiple columns of bottom rollers 111 can be arranged along the width direction of the track 110, and each column can include multiple bottom rollers 111.

[0021] In some embodiments, the height of the track 110 gradually increases from the first end of the track 110 to the second end of the track 110, that is, the track 110 is inclined relative to the horizontal plane, so that after the battery pack 200 is placed at the second end of the track 110, the gravity of the battery pack 200 can generate a component force along the length direction of the track 110, thereby offsetting a part of the frictional resistance received by the battery pack 200, making it easier for the battery pack 200 to move from the second end of the track 110 to the first end, and thus improving the transportation efficiency of the battery pack 200. In some embodiments, when the pushing member is used to push the battery pack 200 to move along the width direction of the track 110, along the width direction of the track 110, the height of the track 110 gradually increases from the first end to the second end, so that the gravity of the battery pack 200 can generate a component force along the width direction of the track 110, thereby offsetting a part of the frictional resistance received by the battery pack 200.

[0022] In some embodiments, the angle between the track 110 and the horizontal plane can be in the range of 0 to 90 degrees. In some embodiments, the angle between the track 110 and the horizontal plane can be in the range of 15 degrees to 75 degrees. In some embodiments, the angle between the track 110 and the horizontal plane can be in the range of 30 degrees to 60 degrees.

[0023] It should be noted that the related embodiments of the ejection device 100 shown in this specification Figure 1 and Figure 2 are only examples and are not intended to limit the specific structure of the ejection device 100. In some embodiments, the track 110 inclined relative to the horizontal plane can be used in combination with the pushing member 120 in other embodiments of this specification, that is, by inclining the track 110 so that the gravity of the battery pack 200 can generate a component force along the length direction of the track 110, and at the same time combining the pushing member 120 to push the battery pack 200, making the battery pack 200 move from the second end of the track 110 to the first end faster and improving the ejection efficiency of the battery pack 200. In some embodiments, the ejection device 100 can only include the track 110 inclined relative to the horizontal plane, that is, only using the gravity of the battery pack 200 to make the battery pack 200 move from the second end of the track 110 to the first end of the track 110, without the need to separately set the pushing member 120, so as to further simplify the structure of the ejection device 100 and reduce the manufacturing cost.

[0024] In some embodiments, the ejecting member 120 may include a pushing portion and an unlocking engaging portion. The pushing portion may be configured to abut against and push the battery pack (e.g., Figure 1 the battery pack 200 in

[0025] . The unlocking engaging portion may be configured to cooperate with the locking member 130 to unlock and lock the movement of the ejecting member 120. Figure 3 and Figure 4 shown, the pushing portion may include a first push plate 121. The first push plate 121 may be disposed at one end in the length direction of the track 110. The first push plate 121 is configured to abut against the battery pack to push the battery pack to move along the length direction of the track 110 when the locking member 130 is unlocked. It should be noted that the pushing portion for pushing the battery pack to move is not limited to the form of the first push plate 121. For example, the first push plate 121 may be replaced with a push rod, a push ball, etc., as long as it can abut against the battery pack and push the battery pack to move. In some embodiments, the unlocking engaging portion may include two second push plates 122. The two second push plates 122 are respectively disposed on both sides in the width direction of the first push plate 121 and are fixed to the first push plate 121. The width direction of the first push plate 121 is parallel to the width direction of the track. The second push plate 122 is fixedly connected to the first push plate 121. The second push plate 122 is configured to cooperate with the locking member 130. When the locking member 130 is in the locked position (as Figure 4 shown), the second push plate 122 is restricted from moving, so the movement of the first push plate 121 is restricted. In some embodiments, a protrusion 123 is provided on the side of the second push plate 122 away from the first push plate 121. When the locking member 130 is in the locked position, the locking member 130 cooperates with the protrusion 123, so that the movement of the second push plate 122 towards the first end of the track 110 can be restricted. When the locking member 130 is in the unlocked position, the locking member 130 does not cooperate with the protrusion 123, so the second push plate 122 can move towards the first end of the track 110. In some embodiments, the second push plate 122 is not necessary, and the first push plate 121 can also be used to cooperate with the locking member 130.

[0026] In some other embodiments, when the ejecting member is configured to push the battery pack to move along the width direction of the track 110, the first push plate 121 may be disposed at one end in the width direction of the track 110 to push the battery pack to move by abutting against the side portion in the width direction of the battery pack. The two second push plates 122 are respectively disposed on both sides in the length direction of the first push plate 121 and are fixed to the first push plate 121. The length direction of the first push plate 121 is parallel to the length direction of the track.

[0027] In some embodiments, in combination with Figure 3 and Figure 4As shown, the locking member 130 may include an unlocking lever 131. When the battery pack (e.g., Figure 1 the battery pack 200 in) is not placed on the track 110, the unlocking lever 131 is in a locking position that restricts the pushing member 120 from moving towards the first end of the track 110. When the battery pack is placed on the track 110, the unlocking lever 131 is in an unlocking position that allows the pushing member 120 to move towards the first end of the track 110.

[0028] In some embodiments, the unlocking lever 131 may include a connecting end (not shown in the figure), a first abutting end 132, and a second abutting end 133. An elastic element (not shown in the figure) is provided between the connecting end of the unlocking lever 131 and the second end of the track 110. The first abutting end 132 and the connecting end extend along the height direction of the track 110 respectively, and the second abutting end 1331 is used to restrict the movement of the pushing member 120. When the battery pack (e.g., Figure 1 the battery pack 200 in) is not placed on the track 110, the elastic element is only affected by the gravity of the unlocking lever 131. At this time, the unlocking lever 131 is in the locking position, and the second abutting end 133 of the unlocking lever 131 abuts against the side of the protrusion 123 of the second push plate 122 close to the first end of the track 110. Therefore, the movement of the pushing member 120 towards the first end of the track 110 can be restricted, and the pushing member 120 is locked. When the battery pack is placed on the track 110, the bottom of the battery pack will abut against the first abutting end 132 of the unlocking lever 131, thereby applying an additional force (i.e., the gravity of the battery pack) to the elastic element, causing the elastic element to be further compressed, and then causing the unlocking lever 131 to move downward along the height direction of the track 110 to the unlocking position, and the second abutting end 133 cannot abut against the protrusion 123 of the second push plate 122. Therefore, the pushing member 120 can push the battery pack towards the first end of the track 110. In some embodiments, when the pushing member 120 is used to push the battery pack to move along the length direction of the track 110, the second abutting end 133 may extend along the width direction of the track 110. In other embodiments, when the pushing member 120 is used to push the battery pack to move along the width direction of the track 110, the second abutting end 133 may extend along the length direction of the track 110 to facilitate the abutment of the protrusion 123 of the second push plate 122.

[0029] In some embodiments, the locking member 130 may include an unlocking fixture 134. The unlocking fixture 134 is disposed at the second end of the track 110 and extends along the height direction of the track 110. The top wall of the unlocking fixture 134 is provided with a first opening 135, and the side wall of the unlocking fixture 134 is provided with a second opening 136. The second opening 136 extends along the height direction of the track 110. The unlocking fixture 134 can be used to accommodate the unlocking rod 131. An elastic element is provided in the unlocking fixture 134. The connecting end of the unlocking rod 131 is connected to the elastic element. The first abutting end 132 can protrude from the first opening 135, and the second abutting end 133 can protrude from the second opening 136. When the battery pack (e.g., Figure 1 the battery pack 200 in is not placed on the track 110, the second abutting end 133 of the unlocking rod 131 abuts against the side of the pushing member 120 close to the first end of the track 110, which can limit the movement of the pushing member 120 towards the first end of the track 110 and lock the pushing member 120. When the battery pack is placed on the track 110, the bottom of the battery pack will abut against the first abutting end 132 of the unlocking rod 131, and the elastic element is further compressed, causing the second abutting end 133 to move downward along the second opening 136 to the unlocking position and preventing the second abutting end 133 from abutting against the pushing member 120. At this time, the pushing member 120 can push the battery pack towards the first end of the track 110.

[0030] In some cases, by providing the unlocking fixture 134, the movement of the unlocking rod 131 and the elastic element can be restricted, making the movement of the unlocking rod 131 and the elastic element more stable, and the second opening 136 can limit the movement range of the second abutting end 133 to prevent the unlocking rod 131 from having too large a movement range.

[0031] In some embodiments, the locking member 130 may further include a photoelectric sensor (not shown in the figure) and an unlocking driving member (not shown in the figure). The unlocking driving member can be drivingly connected to the unlocking rod 131 and can control the movement of the unlocking rod 131 between the unlocking position (corresponding to the position of the unlocking rod 131 when the pushing member 120 is unlocked) and the locking position (corresponding to the position of the unlocking rod 131 when the pushing member 120 is locked). The photoelectric sensor and the unlocking driving member are communicatively connected. The photoelectric sensor is disposed at the bottom of the track 110, and a spring pin and a detection spring are further provided at the bottom of the track 110. When the battery pack (e.g., Figure 1When the battery pack 200) is placed on the track 110, the battery pack can abut against the upper end of the spring pin and push the spring pin to compress the detection spring, causing the detection spring to compress. When the lower end of the spring pin contacts the corresponding photoelectric sensor, the photoelectric sensor can generate an induction signal, and the photoelectric sensor can transmit the induction signal to the unlocking driving member. After receiving the induction signal, the unlocking driving member (for example, a motor, a hydraulic cylinder, etc.) can control the movement of the unlocking rod 131, thereby unlocking the pushing member 120. Similarly, when the battery pack is not placed on the track 110, the spring pin cannot contact the photoelectric sensor, so no induction signal can be generated, and thus the unlocking rod 131 will remain in the locked position.

[0032] In some embodiments, in addition to the photoelectric sensor, other sensors can also be used to determine whether the battery pack is placed on the track 110, including image sensors (cameras), infrared sensors, pressure sensors, etc.

[0033] In some embodiments, in combination with Figure 2 and Figure 5 As shown, the power component 140 may include a spring device 141, and the spring device 141 is provided at the second end of the track 110. When the battery pack (for example, Figure 1 the battery pack 200) in ) is placed on the track 110, that is, when the locking component 130 is unlocked, the spring device 141 can drive the pushing member 120 to move.

[0034] In some embodiments, the spring device 141 may include a spring (not shown in the figure). One end of the spring is connected to the pushing member 120, and the other end of the spring is fixedly connected to the track 110. When the battery pack is not placed on the track 110, the locking component 130 is locked, and the spring is in a deformed state under force. When the battery pack is placed on the track 110, it will cause the locking component 130 to be unlocked, and then the spring will recover its deformation to drive the pushing member 120 to push the battery pack to move towards the first end of the track 110. The stressed state in this embodiment may refer to the spring being in a compressed state or a stretched state. Only by way of example, the spring can be provided at the second end of the track 110, and the pushing member 120 is connected to the second end of the track 110 through the spring. When the battery pack is not placed on the track 110, the spring is in a compressed state. When the battery pack is placed on the track 110, the spring recovers its deformation to drive the pushing member 120 to push the battery pack to move. The spring can include tension springs, compression springs, coil springs, etc.

[0035] In some embodiments, as Figure 5 shown, the spring device 141 may further include a spring balancer 142, a balancer wire (not shown in the figure), and a fixed pulley 143 provided at the first end of the track 110. The working end of the spring balancer 142 passes around the fixed pulley 143 through the balancer wire and is connected to the first end of the pushing member 120 (for example,Figure 4 The spring balancer 142 is connected to the first hook 144 provided at the first end of the ejection component 120, and the hanging end of the spring balancer 142 is connected to the track 110. The working end of the spring balancer 142 may refer to the end of the spring balancer 142 connected to the object being pulled. The hanging end of the spring balancer 142 may be an end that fixes the spring balancer 142. Since the first end of the ejection component 120 is connected to the spring balancer 142, when the locking component 130 is unlocked, the spring balancer 142 will pull the ejection component 120 to move toward the first end of the track 110. When the ejection component 120 pushes the battery pack (for example, Figure 1 During the movement of the battery pack 200 in the track 110, the friction resistance generated between the battery pack and the track 110 can be regarded as the resistance of the push-out component 120, and the friction resistance is positively correlated with the weight of the battery pack, and the spring balancer 142 can balance the pushing force of the push-out component 120 according to the resistance of the push-out component 120. In some embodiments, the hanging end of the spring balancer can be connected to the second end of the track (for example, the second hook 145 provided at the second end of the track 110) through a balancer line.

[0036] In some cases, since the spring balancer 142 can balance the elastic force of the ejection component 120 based on the weight of the battery pack, it can ensure that the position of the battery pack after being thrown out of the track 110 by the ejection component 120 is relatively stable. In addition, the spring balancer 142 and related components occupy a small size and space and have a low cost, which can reduce the overall volume of the ejection device 100 while reducing the manufacturing cost.

[0037] In some embodiments, the push-out component 120 may be driven in other ways. In some embodiments, the power component 140 may include a cylinder drive mechanism, a hydraulic drive mechanism, a magnetic drive mechanism, a motor drive mechanism, etc. As an example only, the power component 140 may include a cylinder drive mechanism, the output shaft of the cylinder drive mechanism is in driving connection with the push-out component 120, the cylinder drive mechanism converts the pressure of the compressed air into mechanical energy through pneumatic transmission, and then drives the push-out component 120 to move through the output shaft of the cylinder drive mechanism.

[0038] In some embodiments, Figure 2 As shown, the ejection device 100 may further include a guide component 150, which may be used to push the ejection component 120 and / or the battery pack (eg, Figure 1 The movement of the battery pack 200 is guided to improve the stability and accuracy of the movement.

[0039] In some embodiments, the guide member 150 may include a guide rod 151, which may be disposed at the bottom of the track 110 for simultaneously guiding the battery packs (eg, Figure 1The battery pack 200 in the battery pack 200 and the ejection component 120 are guided and supported. For example only, Figure 2 As shown, two guide rods 151 are provided between the two track brackets 112, and the length direction of the guide rods 151 is parallel to the length direction of the track bracket 112. In another example, when the push-out component 120 is used to push the battery pack to move along the width direction of the track 110, the length direction of the guide rods 151 can be parallel to the width direction of the track bracket 112. In some embodiments, the friction resistance encountered during the movement of the battery pack can be positively correlated with the number of guide rods 151, and the support capacity of the track 110 for the battery pack can also be positively correlated with the number of guide rods 151. Therefore, the friction resistance encountered during the movement of the battery pack and the support capacity of the track 110 for the battery pack can be changed by increasing or decreasing the number of guide rods 151. In some embodiments, the shape of the guide rod 151 can include cylindrical, prismatic, cubic, etc. In some embodiments, the push-out component 120 is movably connected to the guide rod 151, so that the movement of the push-out component 120 is guided by the guide rod 151.

[0040] In some embodiments, the battery pack (eg, Figure 1 The battery pack 200 in the embodiment may be supported only by the guide rods 151 or only by the bottom rollers 111. In some embodiments, the guide rods 151 and the bottom rollers 111 may be combined, that is, the guide rods 151 and the bottom rollers 111 support the bottom of the battery pack at the same time, which not only improves the supporting capacity, but also reduces the friction resistance of the battery pack due to the bottom rollers 111.

[0041] In some embodiments, the guide member 150 may include limit rods (not shown) disposed on both sides of the track 110 in the width direction. The limit rods may be extended along the length direction of the track 110. The distance between the limit rods on both sides of the track 110 may be greater than or equal to the distance between the battery pack (for example, Figure 1 The width of the battery pack 200 in the track 110 (i.e., the size of the battery pack in the width direction of the track 110) is determined. When the battery pack is placed on the track 110, the limiting rod can guide and limit the side of the battery pack, thereby preventing the battery pack from leaving the track 110. In other embodiments, when the push-out component 120 is used to push the battery pack to move along the width direction of the track 110, the limiting rod can be extended along the width direction of the track 110, and the distance between the limiting rods on both sides of the track 110 can be greater than or equal to the battery pack (for example, Figure 1 The length of the battery pack 200 in the track 110 (i.e., the size of the battery pack in the length direction of the track 110).

[0042] In some embodiments, in combination Figure 2 and Figure 3As shown, the guiding component 150 may further include side rollers 152. The side rollers 152 may include a first side roller 1521 and a second side roller 1522. The first side roller 1521 and the second side roller 1522 are respectively located on both sides in the length direction or the width direction of the track 110. The first side roller 1521 and the second side roller 1522 are respectively used to abut against the side of the battery pack (for example, Figure 1 the battery pack 200 in). Only as an example, connecting rods 153 are provided on the outer sides in the length direction of the two track brackets 112 (that is, the sides of the two track brackets 112 facing away from each other in the width direction). The first side roller 1521 and the first side roller 1522 are respectively rotatably provided on different connecting rods 153 and at the ends far from the track brackets 112. In another example, when the pushing component 120 is used to push the battery pack to move along the width direction of the track 110, connecting rods 153 are provided on the outer sides in the width direction of the two track brackets 112 (that is, the sides of the two track brackets 112 facing away from each other in the length direction).

[0043] In some cases, after the side rollers 152 are provided, when the battery pack is placed on the track 110, the first side roller 1521 and the second side roller 1522 on both sides of the track 110 can abut against the side of the battery, so that the battery pack can be effectively limited. In addition, by providing the side rollers 152, when the battery pack moves along the track 110, the side of the battery pack and the side rollers 152 can form a rolling contact, thereby reducing the frictional resistance received during the movement of the battery pack and effectively improving the transportation efficiency of the battery pack.

[0044] In some embodiments, the number of the first side rollers 1521 may be several. The several first side rollers 1521 are arranged along the length direction of the track 110 to ensure that the battery pack always remains in contact with the first side rollers 1521 during the movement along the length direction of the track 110. Only as an example, as Figure 2 shown, the number of the first side rollers 1521 is 24. The 24 first side rollers 1521 are arranged along the length direction of the track 110, and the 24 first side rollers 1521 are evenly divided into 4 groups. The 6 first side rollers 1521 in each group are arranged at an interval of a first distance, and the first side rollers 1521 between adjacent two groups are spaced apart by a second distance. The first distance may be less than the second distance. Similarly, the setting manner of the second side rollers 1522 may be the same as or similar to that of the first side rollers 1521, which will not be elaborated here. In some other embodiments, when the pushing component 120 is used to push the battery pack to move along the width direction of the track 110, several first side rollers 1521 are arranged along the width direction of the track 110 to ensure that the battery pack always remains in contact with the first side rollers 1521 during the movement along the width direction of the track 110.

[0045] This specification also provides a safety protection system 300 for a battery pack. As shown in combination with Figure 2 and Figure 6 , the safety protection system 300 may include a water tank 400, a battery pack handling device 500, and a throwing device 100 in other embodiments of this specification. The water tank 400 may be disposed at the first end of the track 110, and the water tank 400 contains a coolant for cooling the battery pack (for example, Figure 1 the battery pack 200 therein). In some embodiments, the placement position of the water tank 400 is related to the movement direction of the battery pack 200. For example, when the pushing member 120 is used to push the battery pack along the length direction of the track 110, the water tank 400 may be placed at the first end in the length direction of the track 110 (such as Figure 2 the left side in the length direction of the track 110 in ). Again, for example, when the pushing member 120 is used to push the battery pack along the width direction of the track 110, the water tank 400 may be placed at the first end in the width direction of the track 110. The battery pack handling device 500 may be used to carry the battery pack in an emergency such as thermal runaway to the track 110 of the throwing device 100, and then the pushing member 120 of the throwing device 100 throws the battery pack into the water tank 400 at the first end of the track 110, and the coolant in the water tank 400 is used to cool the overheated battery pack, thereby protecting the battery pack in thermal runaway and other normally operating battery packs and ensuring the safety of the battery pack.

[0046] In some embodiments, the battery pack handling device 500 may include a robotic arm or a robotic claw, and the robotic arm or the robotic claw may be used to grasp the battery pack to be carried. In some embodiments, the battery pack handling device 500 may include a negative pressure suction cup or an electromagnetic adsorption device, etc. The negative pressure suction cup can directly suck the battery pack by negative pressure suction for carrying, and the electromagnetic adsorption device can form a magnetic field suction force on the iron sheet provided in the battery pack and complete the adsorption and carrying.

[0047] In some embodiments, the safety protection system 300 may include a temperature detection device (not shown in the figure), and the temperature detection device may be used to monitor the temperature of the stored battery pack (for example, Figure 1 the battery pack 200 therein). In some embodiments, the temperature detection device may include a temperature sensor, and each temperature sensor may be used to monitor the temperature of one or more battery packs. When the temperature of the battery pack exceeds the set temperature threshold, the temperature sensor may generate a corresponding sensing signal and transmit the sensing signal to the battery pack handling device. The battery pack handling device 500 may obtain the position and temperature of the battery pack in thermal runaway according to the sensing signal, and then carry the battery pack to the track 110 of the throwing device 100.

[0048] In some embodiments, in combination with Figure 2 and Figure 6 As shown, the security system 300 may further include a weight detection device (not shown in the figure) and a thrust adjustment device, and the weight detection device may be communicatively connected to the thrust adjustment device. The weight detection device may be used to detect the weight of the battery pack (e.g., Figure 1 the battery pack 200 therein), and the thrust adjustment device may be used to adjust the thrust of the pushing member 120 according to the weight of the battery pack and the distance between the battery pack and the water tank 400, so that when the battery pack is placed on the track 110, the pushing member 120 can smoothly push the battery pack into the water tank 400. Only by way of example, the weight detection device may include a spring scale, and the spring scale may include a weighing spring. The weighing spring may be disposed on the track 110 and may be used to carry the object to be measured and determine the weight of the object to be measured according to the deformation amount of the weighing spring. When the battery pack is not placed on the track 110, the weighing spring may be regarded as being in a natural state, that is, not being subjected to an external force and not deforming. At this time, the deformation amount of the weighing spring may be regarded as 0. When the battery pack is placed on the track 110, the battery pack presses the weighing spring to cause the weighing spring to deform, and then the weight of the battery pack is determined according to the deformation amount of the weighing spring.

[0049] In some embodiments, the distance between the battery pack and the water tank 400 may be regarded as fixed. For example, the water tank 400 may always be located at the first end of the track 110, and the battery pack picking and placing device 500 may always place the battery pack at the second end of the track 110, so that the distances between different battery packs placed on the track 110 and the water tank 400 are the same.

[0050] In some embodiments, the thrust adjustment device may adjust the driving force output by the power component 140, thereby controlling the thrust of the pushing member 120. Only by way of example, when the power component 140 is a motor drive mechanism, the thrust of the pushing member 120 is positively correlated with the power output by the motor drive mechanism. Therefore, the thrust adjustment device may control the thrust of the pushing member 120 by adjusting the power output by the motor drive mechanism.

[0051] The beneficial effects of the ejection device and the safety protection system provided in this specification may include, but are not limited to: (1) The battery pack that undergoes thermal runaway can be transferred in a timely manner through the ejection device. On the one hand, the battery pack undergoing thermal runaway can be cooled in a timely manner to prevent the temperature of the battery pack from rising further. On the other hand, it can also protect other battery packs in a normal state and avoid losses to personal property; (2) By setting the spring balancer, the elastic force of the pushing component can be balanced based on the weight of the battery pack. Therefore, it can ensure that the position of the battery pack is relatively stable after being ejected from the track by the pushing component. In addition, the spring balancer and related components occupy a small size space and have a low cost, which can reduce the overall volume of the ejection device while reducing the manufacturing cost; (3) After setting the side rollers, when the battery pack is placed on the track, the side rollers on both sides of the track can abut against the side of the battery. Therefore, the battery pack can be effectively limited. In addition, by setting the side rollers, when the battery pack moves along the track, the side of the battery pack forms a rolling contact with the side rollers, thereby reducing the frictional resistance received during the movement of the battery pack and effectively improving the transportation efficiency of the battery pack; (4) By setting the bottom rollers on the track, when the battery pack moves along the track, the bottom of the battery pack forms a rolling contact with the bottom rollers, thereby reducing the frictional resistance received during the movement of the battery pack and effectively improving the transportation efficiency of the battery pack; (5) By tilting the track relative to the horizontal plane, when the battery pack is placed at the second end of the track, the gravity of the battery pack can generate a component force along the length or width direction of the track, making it easier for the battery pack to move from the second end to the first end of the track, thereby improving the transportation efficiency of the battery pack; (6) By setting the unlocking fixing member, the movement of the unlocking rod and the elastic element can be restricted, making the movement of the unlocking rod and the elastic element more stable, and the second opening can limit the movement range of the second abutting end to avoid excessive movement range of the unlocking rod.

[0052] The above are only the preferred embodiments of this specification and are not intended to limit this specification. Any modifications, equivalent replacements, and improvements made within the spirit and principle of this specification shall be included within the protection scope of this specification.

Claims

1. A flinging device for a battery pack, characterized in that, Comprising: A track, on which bottom rollers are provided, and the bottom rollers carry the battery pack; A pushing component, which is used to move along the track to push the battery pack so as to fling the battery pack out from the first end of the track; A locking component, which is used to lock and unlock the pushing component to restrict or allow the pushing component to move along the track, and the locking component includes an unlocking rod; when the battery pack is not placed on the track, the unlocking rod is in a locking position that restricts the pushing component from moving towards the first end of the track; When the battery pack is placed on the track, the unlocking rod is in an unlocking position that allows the pushing component to move towards the first end of the track; A power component, which drives the pushing component to move along the track, and the power component includes a spring device, and the spring device is in transmission connection with the pushing component; when the locking component is unlocked, the spring device can drive the pushing component to move under the action of elastic force; The spring device includes a spring balancer, a balancer wire and a fixed pulley arranged at the first end of the track, the working end of the spring balancer is connected to the pushing component through the balancer wire bypassing the fixed pulley, and the spring balancer is connected to the track.

2. The throwing device according to claim 1, characterized in that, It further includes a guiding component, which is used to guide the movement of the pushing component and / or the battery pack.

3. The flinging device according to claim 2, wherein The guiding component includes a guiding rod, the guiding rod is arranged at the bottom of the track and is arranged along the length direction or the width direction of the track; the pushing component is movably connected to the guiding rod.

4. The ejection device for a battery pack according to claim 2, wherein The guiding component further includes a first side roller and a second side roller, the first side roller and the second side roller are respectively located on both sides in the length direction or the width direction of the track, and the first side roller and the second side roller are respectively used to abut against the side of the battery pack.

5. The flinging device according to claim 1, characterized in that, The height of the track gradually increases from the first end of the track to the second end of the track.

6. A safety guarantee system for a battery pack, characterized in that, Comprising: The flinging device according to any one of claims 1-5; A water tank, which is arranged at the first end of the track; A battery pack picking and placing device, which is used to carry the battery to the track of the flinging device.

7. The security system according to claim 6, characterized in that, It further includes: A weight detection device, which is used to detect the weight of the battery pack; a thrust adjustment device, the weight detection device is in communication connection with the thrust adjustment device, and the thrust adjustment device is used to adjust the thrust of the pushing component according to the weight of the battery pack and the distance between the battery pack and the water tank.

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