Battery protection system, vehicle, and control method for battery protection system

Abstract

A battery protection system, a vehicle, and a control method for a battery protection system. The battery protection system comprises a bracket (1) fixed at the bottom of a vehicle, a locking portion (4) arranged between the bracket (1) and a battery pack (3), and an ejection portion (5), wherein the battery pack (3) is slidably connected to the bracket (1), and the bracket (1) is provided with a clearance opening (11) allowing for the battery pack (3) to slide laterally outward; the locking portion (4) is used for selectively locking or releasing the battery pack (3) laterally; and the ejection portion (5) is used for ejecting, when the battery pack (3) is released, the battery pack (3) to slide outward from the bracket (1).

Description

Battery protection system, vehicle and battery protection system control method

[0001] Cross Reference to Related Applications

[0002] The present application claims priority to the Chinese patent application No. 202410867079.1 filed on June 28, 2024, and entitled "Battery protection system, vehicle and battery protection system control method", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present disclosure relates to the technical field of vehicle battery protection, in particular, to a battery protection system, a vehicle and a battery protection system control method. BACKGROUND

[0004] New energy vehicles equipped with battery packs usually set the battery packs at the bottom of the vehicle. The battery packs at the bottom are in danger of thermal failure caused by impact, bottom scraping, environmental temperature or other factors during driving, which endangers the safety of the vehicle and passengers and poses a safety threat. SUMMARY

[0005] The purpose of the present disclosure is to provide a battery protection system, a vehicle and a battery protection system control method to at least partially solve the problems in the related art.

[0006] To achieve the above purpose, the first aspect of the present disclosure provides a battery protection system, comprising: a bracket for fixing at the bottom of a vehicle, wherein the battery pack is slidingly connected to the bracket, the bracket has an avoidance opening for the battery pack to slide laterally away; a locking part arranged between the bracket and the battery pack, for selectively locking or releasing the battery pack laterally; and a pop-up part for popping up the battery pack to slide away from the bracket when the battery pack is released.

[0007] Optionally, further comprising a mounting rack for accommodating the battery pack, the mounting rack comprising two side plates and two end plates defining a battery pack accommodation space, the bracket is configured as a U-shaped rack having the avoidance opening, and the bracket comprises two opposite side walls and a bottom wall connecting the two side walls, wherein the side plates are slidingly fitted with the corresponding side walls.

[0008] Optionally, the side wall has an opening towards the side plate to accommodate an edge of the side plate, and the inner side of the side wall is provided with a ball groove containing balls for the side plate to contact when sliding.

[0009] Optionally, the locking part comprises a limiting pin movably connected to the side wall, the limiting pin being configured to lock the mounting frame when extending into the side plate, or release the mounting frame when disengaging from the side plate; the ejecting part comprises a first elastic member connected between the bottom wall and one of the two end plates close to the bottom wall,

[0010] The first elastic member stores energy when the limiting pin locks the mounting frame, and releases elastic force when the limiting pin releases the mounting frame.

[0011] Optionally, the number of the limiting pins is multiple.

[0012] Optionally, the mounting frame comprises two side plates and two end plates defining a battery pack accommodating space, and a limiting member for supporting the battery pack from the bottom, wherein the limiting member is movably connected to the side plates and / or the end plates, for selectively releasing the battery pack in the height direction.

[0013] Optionally, a partition plate is connected between the two side plates, capable of separating the battery pack accommodating space into a first space and a second space, and a second elastic member is connected to the partition plate, for providing lateral pre-tightening force to the battery pack.

[0014] Optionally, the mounting frame further comprises a protection assembly connected to the end of the mounting frame in the sliding direction.

[0015] Optionally, the protection assembly comprises a guard beam, and an energy absorption box connecting the guard beam to the mounting frame.

[0016] Optionally, a buffer member is connected to the side of the guard beam opposite to the energy absorption box.

[0017] Optionally, the buffer member is an arc-shaped plate spring.

[0018] Optionally, the energy absorption box is a honeycomb structure, and an energy absorption spring is arranged inside the energy absorption box.

[0019] Optionally, a control assembly is further included, the control assembly comprising a sensing part for obtaining state information of the battery pack, and a control part for controlling the mounting frame to be locked or released in the bracket according to the state information of the battery pack.

[0020] Optionally, the sensing part comprises a displacement sensor, and the state information comprises a deformation amount of the shell of the battery pack.

[0021] Optionally, the sensing part comprises a temperature sensor, and the state information comprises a temperature of the battery pack.

[0022] Optionally, the sensing unit comprises an infrared sensor, and the state information comprises a current distance of the mounting rack from an obstacle in a sliding direction.

[0023] Optionally, the control assembly is electrically connected with a quick disconnect, which is configured to selectively connect or disconnect the battery pack with the electrical load of the vehicle.

[0024] The second aspect of the present disclosure provides a vehicle comprising a battery pack and the battery protection system provided by the first aspect of the present disclosure.

[0025] Optionally, the bracket is fixed between a front axle and a rear axle of the vehicle, and the avoiding opening is directed outward in a width direction of the vehicle.

[0026] The third aspect of the present disclosure provides a battery protection system control method, which is applied to the battery protection system provided by the first aspect of the present disclosure, and comprises: obtaining state information of the battery pack; and controlling the mounting rack to selectively slide away from the bracket.

[0027] Optionally, the step of obtaining the state information of the battery pack comprises: obtaining a deformation amount of a shell of the battery pack,

[0028] The step of controlling the mounting rack to selectively slide away from the bracket comprises: when the deformation amount of the shell of the battery pack is greater than a preset deformation amount, controlling the locking unit to release the mounting rack, and controlling the ejecting unit to eject the mounting rack to slide away from the bracket.

[0029] Optionally, the step of obtaining the state information of the battery pack comprises: obtaining a temperature of the battery pack,

[0030] The step of controlling the mounting rack to selectively slide away from the bracket comprises: when the temperature of the battery pack is greater than a preset temperature value, controlling the locking unit to release the mounting rack, and controlling the ejecting unit to eject the mounting rack to slide away from the bracket.

[0031] Optionally, the step of obtaining the state information of the battery pack comprises: obtaining a user instruction,

[0032] The step of controlling the mounting rack to selectively slide away from the bracket comprises: when the user instruction is received, controlling the locking unit to release the mounting rack, and controlling the ejecting unit to eject the mounting rack to slide away from the bracket.

[0033] Optionally, the mounting rack comprises two side plates and two end plates defining a battery pack accommodating space, and a limiting piece for supporting the battery pack from the bottom, wherein the limiting piece is movably connected to the side plates and / or the end plates for selectively releasing the battery pack in the height direction,

[0034] The battery protection system control method comprises: controlling the limiting piece to selectively release the mounting rack.

[0035] Optionally, the step of obtaining the state information of the battery pack comprises: obtaining the deformation amount of the shell of the battery pack and the current distance of the mounting rack from the obstacle in the sliding-off direction,

[0036] The battery protection system control method comprises: when the deformation amount of the shell of the battery pack is greater than a preset deformation amount and the current distance is greater than a preset distance, controlling the locking part to release the mounting rack and the ejecting part to eject the mounting rack to slide off the bracket, and controlling the limiting piece to support the battery pack; and when the deformation amount of the shell of the battery pack is greater than the preset deformation amount and the current distance is less than or equal to the preset distance, controlling the locking part to lock the mounting rack and the limiting piece to release the battery pack.

[0037] Optionally, the step of obtaining the state information of the battery pack comprises: obtaining the temperature of the battery pack and the current distance of the mounting rack from the obstacle in the sliding-off direction,

[0038] The battery protection system control method comprises: when the temperature of the battery pack is greater than a preset temperature value and the current distance is greater than a preset distance, controlling the locking part to release the mounting rack and the ejecting part to eject the mounting rack to slide off the bracket, and controlling the limiting piece to support the battery pack; and when the temperature of the battery pack is greater than the preset temperature value and the current distance is less than or equal to the preset distance, controlling the locking part to lock the mounting rack and the limiting piece to release the battery pack.

[0039] Optionally, the step of obtaining the state information of the battery pack comprises: obtaining a user instruction and the current distance of the mounting rack from the obstacle in the sliding-off direction,

[0040] The battery protection system control method comprises: when a user's disengagement instruction is received and the current distance is greater than a preset distance, controlling the locking part to release the mounting rack and the ejecting part to eject the mounting rack to slide off the bracket, and controlling the limiting piece to support the battery pack; and when a user's disengagement instruction is received and the current distance is less than or equal to the preset distance, controlling the locking part to lock the mounting rack and the limiting piece to release the battery pack.

[0041] By the above technical solution, the battery pack can be in sliding connection with the bracket fixed at the bottom of the vehicle. When it is needed to separate the battery pack from the vehicle, the battery pack can slide laterally along the bracket and pop out to slide off the bracket, realizing the separation of the battery pack from the vehicle, and further eliminating the safety hazard of the faulty battery pack, and protecting the personal safety of the driver and passengers.

[0042] Other features and advantages of the present disclosure will be described in detail in the following detailed description section. BRIEF DESCRIPTION OF DRAWINGS

[0043] The accompanying drawings are included to provide a further understanding of the present disclosure and constitute a part of the specification, and are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation on the present disclosure. In the drawings:

[0044] The accompanying drawings are included to provide a further understanding of the present disclosure and constitute a part of the specification, and are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation on the present disclosure. In the drawings:

[0045] FIG. 1 is a schematic view of a vehicle with a battery protection system according to an exemplary embodiment.

[0046] FIG. 2 is a structural schematic view of the battery protection system according to an exemplary embodiment.

[0047] FIG. 3 is a partial structural schematic view of the battery protection system according to an exemplary embodiment.

[0048] FIG. 4 is a bottom view of a mounting bracket according to an exemplary embodiment.

[0049] FIG. 5 is a bottom view of a mounting bracket according to an exemplary embodiment.

[0050] FIG. 6 is a structural schematic view of a protection assembly according to an exemplary embodiment.

[0051] FIG. 7 is a schematic view of an energy absorption box according to part A in FIG. 6.

[0052] FIG. 8 is a schematic view of a vehicle according to an exemplary embodiment.

[0053] FIG. 9 is a schematic view of a battery protection system control method according to an exemplary embodiment.

[0054] FIG. 10 is a schematic view of a battery protection system control method according to an exemplary embodiment.

[0055] FIG. 11 is a schematic view of a battery protection system control method according to an exemplary embodiment.

[0056] FIG. 12 is a schematic diagram of a battery protection system control method according to an exemplary embodiment.

[0057] FIG. 13 is a schematic diagram of a battery protection system control method according to an exemplary embodiment.

[0058] BRIEF DESCRIPTION OF DRAWINGS 1-bracket, 11-clearance, 12-side wall, 121-opening, 13-bottom wall, 14-ball groove, 15-ball, 2-mounting frame, 201-battery pack accommodating space, 2011-first space, 2012-second space, 21-side plate, 22-end plate, 23-protection assembly, 231-protection beam, 232-energy absorption box, 2321-energy absorption spring, 233-buffer, 3-battery pack, 31-outer shell, 4-locking portion, 41-limiting pin, 42-limiting member, 5-ejection portion, 51-first elastic member, 52-second elastic member, 53-separation plate, 6-control assembly, 60-control portion, 61-displacement sensor, 62-infrared sensor, 63-fast-break joint, 64-emergency switch, 65-sensing portion, 66-temperature sensor, 7-battery protection system, 8-vehicle, 81-front axle, 82-rear axle. DETAILED DESCRIPTION

[0059] The specific embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely intended to illustrate and explain the present disclosure, and are not intended to limit the present disclosure.

[0060] In the present disclosure, the orientation words such as "top, bottom" used herein generally refer to the top and bottom in actual use of the relevant components, and "inner, outer" refer to the inner and outer relative to the contour of the relevant components. Referring to FIG. 1, the direction indicated by the double-headed arrow is the lateral direction of the vehicle in normal use. In addition, the adjectives "first", "second" and the like used in the present disclosure are used to distinguish one element from another element, and do not have sequentiality and importance.

[0061] In the following description, the same numbers in different drawings represent the same or similar elements unless otherwise indicated.

[0062] The embodiment of the present disclosure provides a battery protection system 7, as shown in FIG. 2, comprising a bracket 1, a locking portion 4 and an ejection portion 5. Wherein, the bracket 1 is fixed on the bottom of the vehicle, the battery pack 3 is slidably connected to the bracket 1, and the bracket 1 has a clearance 11 for the battery pack 3 to slide laterally, the locking portion 4 is arranged between the bracket 1 and the battery pack 3, and can selectively lock or release the battery pack 3 laterally, and the ejection portion 5 can eject the battery pack 3 to slide out of the bracket 1 when the battery pack 3 is released.

[0063] In the above embodiments, the battery pack 3 can be indirectly or directly slidably connected to the bracket 1 through the mounting rack 2. When the battery pack 3 is directly slidably connected to the bracket 1 through the mounting rack 2, the mounting rack 2 is used to keep the battery pack 3 stable during vehicle operation to prevent it from falling off. When the battery pack 3 is indirectly slidably connected to the bracket 1 through the mounting rack 2, the bracket 1 and the mounting rack 2 can be relatively slidably connected at this time, the battery pack 3 can be slid by the mounting rack 2 towards the bracket 1 in the direction of the laterally arranged escape opening 11, and then slid to the bracket 1 through the escape opening 11, thereby realizing the action of the vehicle ejecting the battery pack 3 laterally. When the battery pack 3 is in a situation with a safety threat such as damage or thermal runaway, the mounting rack 2 can eject the battery pack 3 from the vehicle in the lateral direction and out of the safety range of the vehicle body through the action of sliding away from the bracket 1, avoiding the battery pack 3 from being too close to the vehicle body and causing damage to the vehicle, effectively protecting the personal safety of the driver and passengers.

[0064] Generally, the battery pack 3 can be locked in the bracket 1 by the mounting rack 2 through the locking part 4, the mounting rack 2 and the bracket 1 have good stable connection effect during safe operation of the vehicle, and the ejection part 5 can obtain potential energy meeting the preset value when the battery pack 3 is locked in the bracket 1 through the mounting rack 2. When the battery pack 3 has a safety failure, the locking part 4 can release the connection between the mounting rack 2 and the bracket 1, at this time the ejection part 5 can release the accumulated potential energy to the battery pack 3 along the sliding direction of the mounting rack 2, and give the battery pack 3 enough pushing force to make it be ejected through the mounting rack 2 and slide away from the safety range of the vehicle body, the process is fast in response, and the distance of the battery pack 3 ejected laterally to the vehicle meets the safety protection requirements.

[0065] According to some embodiments, referring to FIG. 2, it can also include a mounting rack 2 for accommodating the battery pack 3, the mounting rack 2 can include two side plates 21 and two end plates 22 defining a battery pack accommodating space 201, and the bracket 1 can be configured as a U-shaped rack with an escape opening 11, the bracket 1 can include two opposite side walls 12 and a bottom wall 13 connecting the two side walls 12, wherein the side plates 21 of the mounting rack 2 and the side walls 12 of the corresponding bracket 1 can be slidably fitted. In this embodiment, the battery pack 3 is accommodated in the interior of the mounting rack 2, the mounting rack 2 is enclosed by the two side plates 21 and the two end plates 22 to form the battery pack accommodating space 201, the mounting rack 2 can be directly slidably fitted with the side walls 12 of the corresponding bracket 1, in this sliding fit, the side walls 12 of the bracket 1 can be formed as a fixed rail, the side plates 21 of the mounting rack 2 can be formed as a movable rail, and the mounting rack 2 can realize the sliding action relative to the bracket 1.

[0066] In some embodiments, referring to FIG. 3, the side wall 12 of the bracket 1 can have an opening 121 facing the side plate 21 of the mounting rack 2 to accommodate the edge of the side plate 21, and the inner side of the side wall 12 of the bracket 1 can be provided with a ball groove 14, and the ball groove 14 can accommodate the ball 15 to provide support for the sliding of the side plate 21 and reduce the friction between the side plate 21 and the side wall 12, so as to ensure the stability and smoothness of the sliding action between the side plate 21 and the side wall 12, and at least the side plate 21 does not affect the operation of the battery pack 3 in the mounting rack 2 when sliding relative to the side wall 12.

[0067] According to some embodiments, referring to FIG. 2, the locking part 4 can include a limiting pin 41 movably connected to the side wall 12, which can be configured to lock the mounting rack 2 when extending into the side plate 21, or release the mounting rack 2 when disengaging from the side plate 21. The ejecting part 5 can include a first elastic member 51 connected between the bottom wall 13 of the bracket 1 and one of the two end plates 22 of the mounting rack 2 close to the bottom wall 13, wherein the first elastic member 51 can store energy when the limiting pin 41 locks the mounting rack 2, and release the elastic force when the limiting pin 41 releases the mounting rack 2.

[0068] In the above embodiment, the relative sliding action between the side plate 21 and the side wall 12 can be limited by the limiting pin 41, which can lock them when extending into the side plate 21, at which time the side plate 21 and the side wall 12 are relatively stationary and the connection is stable. When the limiting pin 41 disengages from the side plate 21, the side plate 21 and the side wall 12 lose the locking position, at which time the side plate 21 can restore the relative sliding with the side wall 12, and the limiting pin 41 can be a straight push rod that can be pushed out and extended into the side plate 21 when performing a straight action. At the same time, the ejecting part 5 includes the first elastic member 51, one end of which is connected to the bottom wall 13 of the bracket 1, and the other end is connected to the end plate 22 of the mounting rack 2 at the rear end in the lateral sliding direction. The first elastic member 51 can be compressed and store elastic potential energy when the limiting pin 41 locks the mounting rack 2, and release the elastic potential energy when the limiting pin 41 releases the locking of the mounting rack 2, so as to provide sufficient thrust for the sliding of the mounting rack 2 to realize the action of the mounting rack 2 sliding away from the bracket 1.

[0069] For example, the number of limiting pins 41 can be multiple, and the multiple limiting pins 41 can be arranged on the side wall 12 of the bracket 1 along the sliding direction of the mounting rack 2 to provide more stable locking effect and improve the relative stability between the bracket 1 and the mounting rack 2.

[0070] In some embodiments, referring to Figs. 4 and 5, the mounting rack 2 can include two side plates 21 and two end plates 22, which enclose a battery pack accommodating space 201 for accommodating the battery pack 3, and the bottom of the mounting rack 2 is provided with a limiting piece 42 that can support the battery pack 3 from the bottom, wherein the limiting piece 42 is movably connected to the side plate 21 and / or the end plate 22, and can be used to selectively release the battery pack 3 in the height direction.

[0071] In the above embodiments, the battery pack accommodating space 201 enclosed by the mounting rack 2 can be slightly larger than the length and width dimensions of the battery pack 3, and the battery pack 3 can naturally fall downward by its own gravity when located in the battery pack accommodating space 201. The limiting piece 42 can be provided at the bottom of the mounting rack 2 to support the battery pack 3 from the bottom and prevent it from falling, and the limiting piece 42 can be connected to the side plate 21 and / or the end plate 22 and can ensure good stability when supporting the battery pack 3.

[0072] It should be noted that the limiting piece 42 can extend from the connection with the mounting rack 2 to the center of the battery pack accommodating space 201 or be retracted in the opposite direction, and when the limiting piece 42 extends, the battery pack 3 can be fixedly accommodated in the mounting rack 2, and when the limiting piece 42 is retracted, it can be hidden in the side plate 21 (as shown in Fig. 4) or the end plate 22 (as shown in Fig. 5) of the mounting rack 2, at which time the battery pack 3 no longer receives support and can fall downward under the action of its own gravity to separate from the mounting rack 2, thereby achieving separation from the vehicle body. In the event of a battery pack 3 failure, the battery pack 3 can be separated from the bottom of the vehicle in this way to avoid subsequent damage to the vehicle body caused by the battery pack 3 and to affect the safety of the driver and passengers.

[0073] The specific form of the limiting piece 42 is not limited in the embodiments of the present disclosure. The limiting piece 42 can be a support plate structure that is directly connected or rotationally connected to the side plate 21 and / or the end plate 22 of the mounting rack 2, and can support the battery pack 3 when the limiting piece 42 extends or can be clamped with the battery pack 3 to achieve fixed mounting of the battery pack 3 with the mounting rack 2. Meanwhile, the limiting piece 42 can also be a claw structure that securely grips the battery pack 3 when extended to form a fixed connection with the mounting rack 2, and is released when needed to achieve separation of the battery pack 3. In other embodiments, the limiting piece 42 can also be provided by common methods such as magnetic attraction or riveting, as long as it can form a stable connection between the battery pack 3 and the mounting rack 2 when extended and does not hinder the natural falling of the battery pack 3 when retracted, and further description is omitted here.

[0074] For example, referring to FIG. 4, a partition plate 53 can be connected between the two side plates 21 of the mounting rack 2, the partition plate 53 can divide the battery pack containing space 201 into a first space 2011 and a second space 2012, the partition plate 53 can be connected with a second elastic member 52, the second elastic member 52 can be used to provide a lateral pre-tightening force to the battery pack 3. In this embodiment, the partition plate 53 can divide the containing space, so that the mounting rack 2 can contain more battery packs 3, and the battery packs 3 are installed in a multi-piece form, avoiding the elimination of too many battery packs 3 in a normal state when a single battery pack 3 fails. At the same time, the second elastic member 52 is arranged on the partition plate 53, one end of the second elastic member 52 is fixed on the surface of the partition plate 53, and the other end can abut against the side surface of the battery pack 3. When the deformation direction of the second elastic member 52 is consistent with the action direction of the limiting member 42, the second elastic member 52 can provide a certain pre-tightening force along the extension or retraction direction of the limiting member 42, to help the limiting member 42 stably connect the battery pack 3 to the mounting rack 2.

[0075] According to some embodiments, referring to FIGS. 2 and 6, the mounting rack 2 can further include a protection assembly 23 connected to the end of the mounting rack 2 in the sliding direction. The protection assembly 23 can be used to improve the impact resistance of the mounting rack 2, to reduce the physical damage of the battery pack 3 caused by the collision, thereby reducing the failure probability of the battery pack 3 and improving the running safety of the vehicle body.

[0076] In some embodiments, referring to FIG. 6, the protection assembly 23 can include a guard beam 231 and an energy absorption box 232, wherein the energy absorption box 232 can connect the guard beam 231 to the mounting rack 2, and the energy absorption box 232 can absorb part of the impact potential energy after the guard beam 231 is subjected to an impact, to alleviate the damage caused by the impact force to the battery pack 3 located inside the mounting rack 2, and can effectively improve the impact resistance of the mounting rack 2.

[0077] For example, referring to FIG. 6, the protection assembly 23 can further include a buffer member 233 connected to the side of the guard beam 231 opposite to the energy absorption box 232, the buffer member 233 can be in contact with the impact stress before the guard beam 231 when the protection assembly 23 is subjected to an impact, and can provide a certain potential energy absorption effect for the guard beam 231 and the mounting rack 2 as a whole, to realize the buffering of the impact and improve the overall stability of the protection assembly 23.

[0078] In some embodiments, referring to FIG. 6, the buffer member 233 can be an arc-shaped leaf spring, and one side of the arc of the buffer member 233 can be protruded towards the side of the guard beam 231 opposite to the energy absorption box 232, to form a thicker buffer layer at the middle position of the guard beam 231 where the stress is most concentrated, to provide more buffer protection for the guard beam 231 that is more consistent with the actual collision.

[0079] In some embodiments, referring to FIG. 7, the energy absorption box 232 can be a honeycomb structure, and an energy absorption spring 2321 can be arranged in the honeycomb of the energy absorption box 232. By dividing the energy absorption box 232 into a plurality of honeycomb structures with the same space size and shape, the stress received by the energy absorption box 232 can be evenly dispersed, and the stress concentration caused by the impact can be reduced. At the same time, the energy absorption spring 2321 arranged in the honeycomb can disperse the impact on the whole energy absorption box 232 through the elastic deformation of the energy absorption spring 2321 itself, further improving the impact resistance of the protection assembly 23.

[0080] According to some embodiments, referring to FIG. 2, the battery protection system 7 can further include a control assembly 6, which can include a sensing part 65 and a control part 60. The sensing part 65 can be used to obtain the state information of the battery pack 3 to determine whether the battery pack 3 is damaged or fails, and timely report errors and warnings. The control part 60 can control the mounting rack 2 to be locked in the bracket 1 or released from the bracket 1 according to the state information of the battery pack 3, so that the mounting rack 2 can be stably connected to the bracket 1 when the battery pack 3 is normally running, and the mounting rack 2 is allowed to slide away from the bracket 1 when there is a safety hazard in the battery pack 3, to protect the personal safety of the driver and passengers. For example, the locking part 4 and the limiting part 42 described above can be movable, and the power sources of the two can be controlled by the control assembly in an electrically controlled manner.

[0081] For example, the sensing part 65 can include a displacement sensor 61, referring to FIG. 2, which can be arranged at the end plate 22 in the sliding direction of the mounting rack 2, so as to obtain the deformation degree of the shell 31 of the battery pack 3 in the impact. At this time, the state information of the battery pack 3 can include the deformation amount of the shell 31 of the battery pack 3, and the displacement sensor 61 can determine whether the battery pack 3 is in a situation that needs to be timely removed by obtaining the deformation amount of the shell 31 of the battery pack 3 in the impact process, for example, when the deformation amount of the shell 31 is large and the damage degree of the battery pack 3 is high, it can be determined that it needs to be removed.

[0082] For example, the sensing part 65 can include a temperature sensor 66, referring to FIG. 2, which can be arranged inside the battery pack 3. At this time, the state information of the battery pack 3 can include the temperature of the battery pack 3, and the temperature sensor 66 can determine whether the battery pack 3 is in a situation that needs to be timely removed by obtaining the temperature change of the battery pack 3 in the running process, for example, when the temperature of the battery pack 3 is high, it can be determined that it needs to be removed.

[0083] For example, the sensing unit 65 can include an infrared sensor 62, which can be arranged on the buffer unit, as shown in FIG. 2. In this case, the state information of the battery pack 3 can include the current distance of the mounting rack 2 from the obstacle in the sliding direction. The infrared sensor 62 can select a suitable disengagement direction of the battery pack 3 by determining whether there is an obstacle in the sliding direction of the battery pack 3 or the current distance from the obstacle. For example, when the infrared sensor 62 detects that there is an obstacle in the disengagement direction of one of the battery packs 3 and the current distance is less than or equal to 1 meter, the battery pack 3 can select another disengagement direction to disengage.

[0084] In some embodiments, as shown in FIG. 2, the battery protection system 7 can further include a quick disconnect joint 63 for selectively connecting or disconnecting the battery pack 3 and the electrical device of the vehicle. When the battery pack 3 needs to be disengaged, the quick disconnect joint 63 can quickly disconnect the battery pack 3 and the electrical device of the vehicle to prevent the electrical device of the vehicle from being damaged or hindered by the disengagement of the battery pack 3 due to the connection of the wire or other structure.

[0085] Referring to FIG. 8, the second aspect of the present disclosure provides a vehicle, which can include the battery pack 3 and the battery protection system according to any one of the above embodiments.

[0086] For example, as shown in FIG. 1, the bracket 1 can be fixed between the front axle 81 and the rear axle 82 of the vehicle, and the avoiding opening 11 of the bracket 1 can be directed to the outside in the width direction of the vehicle, which refers to the two lateral directions of the vehicle during normal driving. In this embodiment, the mounting rack 2 can slide and pop out the battery pack 3 to the side of the vehicle, quickly away from the safety range of the vehicle body, and avoid further damage to the vehicle, effectively protecting the personal safety of the driver and passengers.

[0087] Referring to FIGS. 9-13, the third aspect of the present disclosure provides a battery protection system control method, which can be applied to the battery protection system according to the first aspect of the present disclosure. The battery protection system control method can include the following steps:

[0088] In step S101, the state information of the battery pack 3 is obtained.

[0089] In step S102, the mounting rack 2 is controlled to selectively slide out of the bracket 1.

[0090] In the above embodiments, after obtaining the state information of the battery pack 3, the battery protection system 7 can determine whether the state information of the battery pack 3 is in a safe operating state to control whether the mounting rack 2 slides out of the bracket 1. This response is rapid, which can timely protect the personal safety of the driver and passengers and eliminate the safety hazards after the battery pack 3 loses control.

[0091] For example, step S101 can include the following steps:

[0092] Step S1011, obtain the deformation amount of the shell 31 of the battery pack 3.

[0093] At this time, step S102 can include:

[0094] Step S1021, when the deformation amount of the shell 31 of the battery pack 3 is greater than the preset deformation amount, control the locking part 4 to release the mounting rack 2, and pop the mounting rack 2 out to the slide-off bracket 1 through the ejection part 5.

[0095] Among them, the preset deformation amount of the shell 31 of the battery pack 3 can be the maximum deformation amount that can be allowed under the premise of not affecting the normal use function of the battery pack 3, and the deformation amount can be obtained by the displacement sensor 61.

[0096] For example, step S101 can include:

[0097] Step S1012, obtain the temperature of the battery pack 3.

[0098] At this time, step S102 can include:

[0099] Step S1022, when the temperature of the battery pack 3 is greater than the preset temperature value, control the locking part 4 to release the mounting rack 2, and pop the mounting rack 2 out to the slide-off bracket 1 through the ejection part 5.

[0100] Among them, the preset value of the temperature of the battery pack 3 can be the maximum temperature that can be allowed under the premise that the internal thermal runaway does not occur when the battery pack 3 is normally used, and the temperature value can be obtained by the temperature sensor 66.

[0101] For example, step S101 can include:

[0102] Step S1013, obtain the user instruction.

[0103] At this time, step S102 can include:

[0104] Step S1023, when receiving the user's escape instruction, control the locking part 4 to release the mounting rack 2, and pop the mounting rack 2 out to the slide-off bracket 1 through the ejection part 5.

[0105] Among them, the user instruction can be issued by the driver manually opening the emergency switch, the emergency switch can be connected with the control assembly, and the control assembly 6 controls the locking part 4 to release the mounting rack 2, at the same time, the mounting rack 2 can be popped out to the slide-off bracket 1 through the ejection part 5, and the ejection demand and opportunity of the battery pack 3 can be controlled by the driver according to the actual situation, which has good operability and improves the accuracy of protection.

[0106] In some embodiments, the mounting rack 2 can include two side plates 21 and two end plates 22 defining a battery pack accommodating space 201, and a limiting piece 42 for supporting the battery pack 3 from the bottom, wherein the limiting piece 42 is movably connected to the side plates 21 and / or the end plates 22 for selectively releasing the battery pack 3 in the height direction, and the battery protection system control method can include:

[0107] Step S201, controlling the limiting piece 42 to selectively release the mounting rack 2.

[0108] In this embodiment, the limiting piece 42 normally maintains a state of supporting the battery pack 3 from the bottom of the mounting rack 2, which can provide a stable positioning effect for the battery pack 3, and when it is necessary to release the battery pack 3 in the height direction, the limiting piece 42 can be retracted to make the battery pack 3 lose support in the height direction, and the battery pack 3 can naturally fall by its own gravity and separate from the mounting rack 2, thereby achieving separation of the battery pack 3.

[0109] In some embodiments, step S101 can include:

[0110] Step S301, obtaining a deformation amount of the shell 31 of the battery pack 3 and a current distance of the mounting rack 2 from the obstacle in the sliding direction.

[0111] The battery protection system control method can include:

[0112] Step S302, when the deformation amount of the shell 31 of the battery pack 3 is greater than a preset deformation amount and the current distance is greater than a preset distance, controlling the locking part 4 to release the mounting rack 2, and controlling the ejecting part 5 to eject the mounting rack 2 to the sliding bracket 1, and controlling the limiting piece 42 to support the battery pack 3.

[0113] Step S303, when the deformation amount of the shell 31 of the battery pack 3 is greater than the preset deformation amount and the current distance is less than or equal to the preset distance, controlling the locking part 4 to release the mounting rack 2, and controlling the limiting piece 42 to release the battery pack 3.

[0114] When the deformation amount of the shell 31 of the battery pack 3 is greater than the preset deformation amount, it can be considered that the battery pack 3 has a safety hazard, and the battery pack 3 can be separated from the vehicle body. At this time, it is detected whether there is an obstacle in the sliding direction of the mounting rack 2, or the distance of the mounting rack 2 from the obstacle in the sliding direction is obtained, and if the conditions for sliding the mounting rack 2 are met, the mounting rack 2 can be directly ejected from the bracket 1 to the sliding direction. If the current distance of the obstacle does not meet the requirement of the preset distance, continuously ejecting the mounting rack 2 can cause the mounting rack 2 to bounce back to the vehicle body range, which poses a certain safety threat to the vehicle body. In this case, the limiting piece 42 can be controlled to release the battery pack 3, so that the battery pack 3 naturally separates from the mounting rack 2 to the bottom of the vehicle body, thereby achieving separation of the battery pack 3 and effectively preventing the battery pack 3 from still being in the vehicle.

[0115] It should be noted that the number of battery packs 3 in the embodiments of the present disclosure is multiple. In the case of disengaging part of the battery packs 3, if the vehicle still maintains the driving ability, it can continue to move. At this time, the fault battery pack 3 is disengaged from the bottom of the vehicle body, and the vehicle can continue to move away from the fault battery pack 3. This process can ensure that the fault battery pack 3 is outside the safe range of the vehicle, thereby effectively protecting the safety of the vehicle.

[0116] In some embodiments, step S101 can include:

[0117] Step S401, obtaining the temperature of the battery pack 3 and the current distance of the mounting rack 2 from the obstacle in the sliding direction.

[0118] The battery protection system control method can include:

[0119] Step S402, when the temperature of the battery pack 3 is greater than the preset temperature value and the current distance is greater than the preset distance, control the locking part 4 to release the mounting rack 2, and pop the mounting rack 2 to the sliding bracket 1 through the pop-up part 5, and control the limiting part 42 to support the battery pack 3.

[0120] Step S403, when the temperature of the battery pack 3 is greater than the preset temperature value and the current distance is less than or equal to the preset distance, control the locking part 4 to release the mounting rack 2, and control the limiting part 42 to release the battery pack 3.

[0121] Wherein, when the temperature of the battery pack 3 is greater than the preset temperature value, it can be considered that the battery pack 3 has a safety hazard, the battery pack 3 can be separated from the vehicle body, and the step of separating the battery pack 3 from the vehicle body can refer to steps S302 and S303, which will not be repeated here.

[0122] In some embodiments, step S101 can include:

[0123] Step S501, obtaining the user instruction and the current distance of the mounting rack 2 from the obstacle in the sliding direction.

[0124] The battery protection system control method can include:

[0125] Step S502, when receiving the disengagement instruction of the user and the current distance is greater than the preset distance, control the locking part 4 to release the mounting rack 2, and pop the mounting rack 2 to the sliding bracket 1 through the pop-up part 5, and control the limiting part 42 to support the battery pack 3.

[0126] Step S503, when receiving the disengagement instruction of the user and the current distance is less than or equal to the preset distance, control the locking part 4 to release the mounting rack 2, and control the limiting part 42 to release the battery pack 3.

[0127] Wherein, the user can send the instruction of separating from the battery pack 3 to the control assembly through the emergency switch 64, the control assembly can execute the separation step of the battery pack 3 from the vehicle body according to the user's separation instruction, and the separation step can refer to steps S302 and S303, which will not be described here.

[0128] The preferred embodiments of the present disclosure are described in detail above in combination with the drawings, but the present disclosure is not limited to the specific details in the above-described embodiments. Within the technical concept scope of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

[0129] In addition, it should be noted that each specific technical feature described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, various possible combinations are not described again in the present disclosure.

[0130] In addition, various different embodiments of the present disclosure can also be combined in any manner, as long as they do not deviate from the idea of the present disclosure, and they should also be considered as disclosed by the present disclosure.

Claims

1. A battery protection system (7), characterized in that, include: A bracket (1) is used to fix the battery pack (3) to the bottom of the vehicle, wherein the battery pack (3) is slidably connected to the bracket (1), and the bracket (1) has a clearance opening (11) for the battery pack (3) to slide laterally away; A locking part (4), disposed between the bracket (1) and the battery pack (3), is used to selectively lock or release the battery pack (3) laterally; and The pop-out part (5) is used to pop the battery pack (3) out of the bracket (1) when the battery pack (3) is released.

2. The battery protection system (7) according to claim 1, characterized in that, It also includes a mounting bracket (2) for accommodating the battery pack (3), the mounting bracket (2) including two side plates (21) and two end plates (22) defining a battery pack accommodating space (201); The bracket (1) is constructed as a U-shaped frame with the clearance opening (11), and the bracket (1) includes two opposing side walls (12) and a bottom wall (13) connecting the two side walls (12). The side plate (21) and the corresponding side wall (12) are in sliding fit.

3. The battery protection system (7) according to claim 2, characterized in that, The sidewall (12) has an opening (121) facing the side plate (21) to accommodate the edge of the side plate (21). A ball groove (14) is provided on the inner side of the sidewall (12), and the ball groove (14) contains a ball (15) for the side plate (21) to contact during sliding.

4. The battery protection system (7) according to claim 2 or 3, characterized in that, The locking part (4) includes a limiting pin (41) movably connected to the side wall (12), the limiting pin (41) being configured to lock the mounting bracket (2) when extended into the side plate (21), or to release the mounting bracket (2) when disengaged from the side plate (21); The pop-out portion (5) includes a first elastic element (51), which is connected between the bottom wall (13) and one of the two end plates (22) closer to the bottom wall (13). The first elastic element (51) stores energy when the limiting pin (41) locks the mounting bracket (2), and releases elastic force when the limiting pin (41) releases the mounting bracket (2).

5. The battery protection system (7) according to claim 4, characterized in that, The number of the limiting pins (41) is multiple.

6. The battery protection system (7) according to any one of claims 2-5, characterized in that, The mounting bracket (2) includes two side plates (21) and two end plates (22) defining a battery pack receiving space (201), and a limiting member (42) for supporting the battery pack (3) from the bottom, wherein the limiting member (42) is movably connected to the side plates (21) and / or the end plates (22) for selectively releasing the battery pack (3) in the height direction.

7. The battery protection system (7) according to any one of claims 2-6, characterized in that, A partition (53) is connected between the two side plates (21) to divide the battery pack housing space (201) into a first space (2011) and a second space (2012). The partition (53) is connected to a second elastic member (52) for providing lateral preload to the battery pack (3).

8. The battery protection system (7) according to any one of claims 2-7, characterized in that, The mounting bracket (2) also includes a protective component (23) connected to the end of the mounting bracket (2) in the sliding direction.

9. The battery protection system (7) according to claim 8, characterized in that, The protective component (23) includes: Protective beam (231); and The energy-absorbing box (232) connects the guard beam (231) to the mounting bracket (2).

10. The battery protection system (7) according to claim 9, characterized in that, It also includes a buffer (233) connected to the side of the guard beam (231) opposite to the energy-absorbing box (232).

11. The battery protection system (7) according to claim 10, characterized in that, The buffer (233) is an arc-shaped leaf spring.

12. The battery protection system (7) according to any one of claims 9-11, characterized in that, The energy-absorbing box (232) has a honeycomb structure, and an energy-absorbing spring (2321) is provided inside the energy-absorbing box (232).

13. The battery protection system (7) according to any one of claims 1-12, characterized in that, It also includes a control component (6), which includes... The sensing unit (65) is used to acquire the status information of the battery pack (3); and The control unit (60) is used to control the mounting bracket (2) to lock or release on the bracket (1) according to the status information of the battery pack (3).

14. The battery protection system (7) according to claim 13, characterized in that, The sensing unit (65) includes a displacement sensor (61), and the status information includes the amount of deformation of the outer shell (31) of the battery pack (3).

15. The battery protection system (7) according to claim 13 or 14, characterized in that, The sensing unit (65) includes a temperature sensor (66), and the status information includes the temperature of the battery pack (3).

16. The battery protection system (7) according to any one of claims 13-15, characterized in that, The sensing unit (65) includes an infrared sensor (62), and the status information includes the current distance of the mounting bracket (2) from the obstacle in the sliding direction.

17. The battery protection system (7) according to any one of claims 13-16, characterized in that, Includes a quick-connect connector (63) electrically connected to the control component (6) for selectively connecting or disconnecting the battery pack (3) from the electrical appliances of the vehicle.

18. A vehicle (8), characterized in that, It includes a battery pack (3) and a battery protection system (7) according to any one of claims 1-17.

19. The vehicle (8) according to claim 18, characterized in that, The bracket (1) is fixed between the front axle (81) and the rear axle (82) of the vehicle, and the clearance (11) faces outward in the width direction of the vehicle.

20. A control method for a battery protection system, characterized in that, Applied to the battery protection system (7) of claim 1, the battery protection system control method includes: Obtain the status information of the battery pack (3); and Control the mounting bracket (2) to selectively slide away from the bracket (1).

21. The battery protection system control method according to claim 20, characterized in that, The step of obtaining the status information of the battery pack (3) includes: Obtain the deformation amount of the outer shell (31) of the battery pack (3). The step of controlling the mounting bracket (2) to selectively slide away from the bracket (1) includes: When the deformation of the outer shell (31) of the battery pack (3) is greater than the preset deformation, the locking part (4) is controlled to release the mounting bracket (2), and the mounting bracket (2) is ejected from the bracket (1) by the pop-out part (5).

22. The battery protection system control method according to claim 20 or 21, characterized in that, The step of obtaining the status information of the battery pack (3) includes: The temperature of the battery pack (3) is obtained. The step of controlling the mounting bracket (2) to selectively slide away from the bracket (1) includes: When the temperature of the battery pack (3) is greater than the preset temperature value, the locking part (4) is controlled to release the mounting bracket (2), and the mounting bracket (2) is ejected from the bracket (1) by the pop-out part (5).

23. The battery protection system control method according to any one of claims 20-22, characterized in that, The step of obtaining the status information of the battery pack (3) includes: Obtain user commands. The step of controlling the mounting bracket (2) to selectively slide away from the bracket (1) includes: Upon receiving a user's detachment command, the locking part (4) is controlled to release the mounting bracket (2), and the mounting bracket (2) is ejected from the bracket (1) by the ejection part (5).

24. The battery protection system control method according to any one of claims 20-23, characterized in that, The mounting bracket (2) includes two side plates (21) and two end plates (22) defining a battery pack receiving space (201), and a limiting member (42) for supporting the battery pack (3) from the bottom, wherein the limiting member (42) is movably connected to the side plates (21) and / or the end plates (22) for selectively releasing the battery pack (3) in the height direction. The battery protection system control method includes: The limiting member (42) is controlled to selectively release the mounting bracket (2).

25. The battery protection system control method according to claim 24, characterized in that, The step of obtaining the status information of the battery pack (3) includes: Obtain the deformation of the outer casing (31) of the battery pack (3) and the current distance of the mounting bracket (2) from the obstacle in the sliding direction. The battery protection system control method includes: When the deformation of the outer shell of the battery pack (3) is greater than a preset deformation and the current distance is greater than a preset distance, the locking part is controlled to release the mounting bracket (2), and the mounting bracket (2) is ejected from the bracket (1) by the pop-out part, and the limiting member (42) is controlled to support the battery pack (3); and When the deformation of the outer shell (31) of the battery pack (3) is greater than the preset deformation and the current distance is less than or equal to the preset distance, the locking part (4) is controlled to lock the mounting bracket (2), and the limiting member (42) is controlled to release the battery pack (3).

26. The battery protection system control method according to claim 24 or 25, characterized in that, The step of obtaining the status information of the battery pack (3) includes: The temperature of the battery pack (3) and the current distance of the mounting bracket (2) from the obstacle in the sliding direction are obtained. The battery protection system control method includes: When the temperature of the battery pack (3) is greater than a preset temperature value and the current distance is greater than a preset distance, the locking part (4) is controlled to release the mounting bracket (2), and the mounting bracket (2) is ejected from the bracket (1) by the pop-out part (5), and the limiting member (42) is controlled to support the battery pack (3); and When the temperature of the battery pack (3) is greater than the preset temperature value and the current distance is less than or equal to the preset distance, the locking part (4) is controlled to lock the mounting bracket (2), and the limiting member (42) is controlled to release the battery pack (3).

27. The battery protection system control method according to any one of claims 24-26, characterized in that, The step of obtaining the status information of the battery pack (3) includes: Obtain the user command and the current distance of the mounting bracket (2) from the obstacle in the sliding direction. The battery protection system control method includes: Upon receiving a user's detachment command and when the current distance is greater than a preset distance, the locking part (4) is controlled to release the mounting bracket (2), and the mounting bracket (2) is ejected from the bracket (1) via the pop-out part (5), while the limiting member (42) supports the battery pack (3); and When a user's detachment command is received and the current distance is less than or equal to the preset distance, the locking part (4) is controlled to lock the mounting bracket (2), and the limiting member (42) is controlled to release the battery pack (3).

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