Battery management system of new energy automobile

Abstract

The invention discloses a battery management system of a new energy automobile, which comprises a suspension module, a circuit switching module, a main battery pack, a standby battery pack, a monitoring module and a switching module, and is characterized in that the suspension module is used for suspending the main battery pack and bearing the standby battery pack; the circuit switching module is used for supplying power to an automobile power system when the electric energy of the main battery pack and the electric energy of the standby battery pack are different, the monitoring module is used for monitoring the main battery pack on the hanging module, and when the main battery pack is on fire, high temperature or smog, the hanging module releases the main battery pack downwards. According to the invention, by arranging the monitoring module, the suspension module, the switching module, the circuit switching module, the main battery pack and the standby battery pack, when the monitoring module monitors that the main battery pack is abnormal, the switching module is controlled to switch the standby battery pack to supply power to an automobile power system through the circuit switching module, and meanwhile, the suspension module releases the abnormal main battery pack; therefore, the abnormal main battery pack is prevented from damaging the whole automobile.

Description

Technical Field

[0001] The present invention relates to the technical field of battery management, and in particular to a battery management system for a new energy vehicle. Background Art

[0002] The development of new energy generation and new energy vehicles is inseparable from batteries. Batteries require battery management systems. Existing battery management systems mainly manage the battery power supply status, such as structural status, battery temperature monitoring, battery cooling conditions, etc.

[0003] At present, the battery of a new energy vehicle is usually fixedly suspended at the bottom of the bottom of the vehicle. The bottom of the battery is directly above the driving road surface, and the battery and the ground are usually suspended and connected in a fixed connection manner. Therefore, when the battery is abnormal (overtemperature, fire, smoke release, etc.), the battery cannot be used any more, and it is difficult to quickly separate the battery from the vehicle when the battery is abnormal, which can easily ignite the vehicle and increase losses. In addition, the battery is installed at the bottom of the vehicle chassis in order to solve the problem of heat dissipation, and is usually in an exposed state. It does not have the function of impact buffering, and it is easy to accidentally hit the battery and cause it to become abnormal. In view of this, there is an urgent need on the market for a management system that can release the battery from the vehicle according to the abnormality of the battery.

[0004] To this end, the present invention proposes a battery management system for a new energy vehicle. Summary of the invention

[0005] The purpose of the present invention is to propose a battery management system for a new energy vehicle in order to solve the problems mentioned in the background technology.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A battery management system for a new energy vehicle comprises a suspension module, a circuit adapter module, a main battery pack, a backup battery pack, a monitoring module and a switching module. The suspension module is used to suspend the main battery pack and carry the backup battery pack. The circuit adapter module is used to supply power to the vehicle power system from the main battery pack and the backup battery pack at different times. The monitoring module is used to monitor the main battery pack on the suspension module. When the main battery pack is on fire, has a high temperature or smoke, the suspension module releases the main battery pack downward. The switching module is connected to the circuit adapter module. The switching module controls the main battery pack and the backup battery pack to be connected to the circuit adapter module at different times. When the main battery pack is released, the switching module controls the backup battery pack to be connected to the circuit adapter module.

[0008] As a further description of the above technical solution:

[0009] The suspension module includes a load-bearing plate, a suspension plate, a telescopic drive rod, a groove-shaped support plate and a support plate. There are two groove-shaped support plates and the middle parts of the two are rotatably connected to the bottom of the load-bearing plate near the two ends respectively. The main battery pack is located below the load-bearing plate and its two ends extend into adjacent groove-shaped support plates. The top of the main battery pack is fixedly connected to the suspension plate, and the two ends of the suspension plate are slidably connected to the support plate. The bottom of the support plate is fixedly connected to a buckle plate near the free end, and the top of the groove-shaped support plate is fixedly connected to a stop shaft that buckles with the buckle plate. The buckle grooves on the buckle plates at both ends of the suspension plate face opposite directions. The telescopic drive rod is fixedly arranged at the bottom of the load-bearing plate and is used for the sliding of the support plates at both ends of the suspension plate.

[0010] As a further description of the above technical solution:

[0011] The bottom of the carrier plate is welded with suspension shafts near both ends through a hanging plate, a connecting sleeve mounted on the suspension shaft is welded in the middle of the middle plate on the grooved support plate, a clearance gap is opened on the back of the grooved support plate, the outer wall of the suspension shaft is fixedly connected with a baffle plate whose one side is in contact with one end of the main battery pack, and the bottom of the main battery pack is fixedly connected with rubber pads near both ends and pressed against the bottom of the grooved support plate.

[0012] As a further description of the above technical solution:

[0013] Both ends of the suspension plate are provided with slideways that slide with one end of the support plate. A transmission shaft with a gap passing through the suspension plate is welded on the top of the support plate. The free end of the action rod on the telescopic drive rod is fixedly connected with an adapter sleeve mounted on the outside of the transmission shaft. The adapter sleeve and the transmission shaft can slide and detachably cooperate.

[0014] As a further description of the above technical solution:

[0015] The switching module includes a motherboard and a male board. The motherboard is arranged on the carrier board and an interface is provided at the bottom. The male board is located below the motherboard and connected to the suspension board. A connector that is plugged into the interface is provided on the top of the male board. A trigger switch is provided at the bottom of the motherboard.

[0016] As a further description of the above technical solution:

[0017] The male plate is a grooved plate structure with an opening facing downward, and the two vertical plates on the male plate are elastically slidably connected to the two sides of the suspension plate respectively. There are two support plates on the suspension plate, and a transmission cavity connected to the slideway is provided in the suspension plate. One end of the two support plates extends into the transmission cavity, and two intermediate shafts are rotatably connected in the transmission cavity, which are respectively located below the two support plates and on both sides of the male plate. The two ends of the intermediate shaft are fixedly connected with gear 2 meshing with one side of the vertical plate, and a gear 1 meshing with the support plate is fixedly sleeved on the intermediate shaft.

[0018] As a further description of the above technical solution:

[0019] The action rod is serially connected with an elastic telescopic shock-absorbing rod, and the mother plate and the bearing plate are elastically slidably connected up and down.

[0020] As a further description of the above technical solution:

[0021] The elastic telescopic shock-absorbing rod includes a sleeve, a shock-absorbing spring and a pressure plate. The shock-absorbing spring and the pressure plate are both sleeved in the sleeve. A through hole opposite to the pressure plate is opened at one end of the sleeve. One side of the pressure plate is welded and connected to a short shaft and an adapter sleeve through the through hole. One end of the sleeve is welded and connected to one end of the action rod. The tops of both sides of the motherboard are connected to the top of the load-bearing plate through an elastic telescopic pull rod.

[0022] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0023] 1. In the present invention, by setting a monitoring module, a suspension module, a switching module, a circuit transfer module, a main battery pack and a backup battery pack, when the main battery pack monitored by the monitoring module is abnormal, the switching module is controlled to switch the backup battery pack to supply power to the vehicle power system through the circuit conversion module, and at the same time the suspension module releases the abnormal main battery pack to separate it from the vehicle, so as to avoid the abnormal main battery pack from damaging the entire vehicle.

[0024] 2. In the present invention, the suspension module includes a load-bearing plate, a suspension plate, a telescopic driving rod, a grooved support plate and a support plate, wherein the load-bearing plate supports the main battery pack located below the load-bearing plate through two grooved support plates, and the main battery pack locks the two grooved plates through the suspension plate and the two support plates, wherein the telescopic driving rod is arranged at the bottom of the load-bearing plate and is used to control the support plate to slide relative to the suspension plate, and when the main battery pack needs to be released, the two support plates are controlled to move in opposite directions so that the main battery pack can be stably transmitted downward and released, and the distance between the main battery pack and the driving road surface is reduced when the main battery pack is released, so that the release of the main battery pack is more stable and safe.

[0025] 3. In the present invention, an elastic telescopic shock-absorbing rod is arranged on the telescopic driving rod, and then the motherboard on the switching module is arranged to be elastically slidably connected up and down relative to the supporting plate, so that the main battery pack will move up to compensate when hit by the protrusion below, thereby preventing the main battery pack from being damaged by foreign objects. It can effectively avoid abnormal problems (such as leakage and fire) caused by bottom impact on the main battery pack, thereby improving the passability of the new energy vehicle on complex roads. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the structure of a battery management system for a new energy vehicle proposed by the present invention;

[0027] Figure 2 This is a front view of a battery management system for a new energy vehicle proposed by the present invention;

[0028] Figure 3 A schematic diagram of the structure of the support plate, the grooved support plate and the main battery pack of a battery management system for a new energy vehicle proposed by the present invention;

[0029] Figure 4 This is a schematic diagram of the structure of the support plate, the male plate and the suspension plate of the battery management system of a new energy vehicle proposed by the present invention;

[0030] Figure 5 This is a schematic diagram of the structure of the coordination of the intermediate shaft, the suspension plate and the vertical plate of a battery management system for a new energy vehicle proposed by the present invention;

[0031] Figure 6 This is a structural schematic diagram of a telescopic driving rod and a motherboard of a battery management system for a new energy vehicle proposed by the present invention;

[0032] Figure 7 This is a plan view of a main battery pack of a battery management system for a new energy vehicle proposed by the present invention when it is released;

[0033] Figure 8 This is a cross-sectional view of an elastic telescopic shock absorbing rod of a battery management system for a new energy vehicle proposed by the present invention.

[0034] Legend:

[0035] 1. Suspension module; 11. Loading plate; 111. Suspension shaft; 1111. Baffle; 12. Suspension plate; 121. Slideway; 122. Transmission chamber; 1221. Intermediate shaft; 12211. Gear 2; 12212. Gear 1; 13. Telescopic drive rod; 131. Action rod; 1311. Adapter sleeve; 1312. Elastic telescopic shock absorbing rod; 13121. Casing; 13122. Shock absorbing spring; 13123. Pressure plate; 131231. Short-circuit shaft ; 14. Slot-type support plate; 141. Stop shaft; 142. Middle plate; 1421. Connecting sleeve; 143. Clearance gap; 15. Support plate; 151. Buckle plate; 152. Drive shaft; 2. Circuit transfer module; 3. Main battery pack; 31. Rubber pad; 4. Backup battery pack; 5. Monitoring module; 6. Switching module; 61. Motherboard; 611. Interface; 612. Elastic telescopic pull rod; 613. Trigger switch; 62. Male board; 621. Connector; 622. Vertical board. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] Example 1

[0038] See also Figure 1-7 A battery management system for a new energy vehicle includes a suspension module 1, a circuit switching module 2, a main battery pack 3, a backup battery pack 4, a monitoring module 5 and a switching module 6. The suspension module 1 is used to suspend the main battery pack 3 and carry the backup battery pack 4.

[0039] The function of the circuit switching module 2 is to supply power to the vehicle power system from the electric energy of the main battery pack 3 and the backup battery pack 4 at different times. Here, "at different times" means that when the main battery pack 3 supplies power to the vehicle power system, the backup battery pack 4 is disconnected from the vehicle power system.

[0040] The monitoring module 5 is used to monitor the main battery pack 3 on the suspension module 1. When the main battery pack 3 catches fire, high temperature or smoke, the suspension module 1 releases the main battery pack 3 downward. In other words, the release function of the suspension module 1 is triggered when any of the conditions of fire, high temperature or smoke is met.

[0041] Among them, the switching module 6 is connected to the circuit adapter module 2, and the switching module 6 controls the main battery pack 3 and the backup battery pack 4 to be connected to the circuit adapter module 2 at the same time. When the main battery pack 3 is released, the switching module 6 controls the backup battery pack 4 and the circuit adapter module 2 to be connected, and the backup battery pack 4 supplies power to the vehicle power system through the circuit adapter module 2, so that the vehicle can travel short distances when separated from the main battery pack 3.

[0042] Specifically, the suspension module 1 includes a load-bearing plate 11, a suspension plate 12, a telescopic driving rod 13, a grooved support plate 14 and a support plate 15, wherein the load-bearing plate 11 is installed at the bottom of the vehicle chassis when in use. There are two grooved support plates 14, and the middle parts of the two grooved support plates 14 are rotatably connected to the bottom of the load-bearing plate 11 near the two ends. The main battery pack 3 is located below the load-bearing plate 11 and its two ends extend into the adjacent grooved support plates 14. The main battery pack 3 is in the shape of a rectangular plate and its two ends are supported by the grooved support plates 14. When the two grooved support plates 14 swing down synchronously, the height of the main battery pack 3 supported by the two grooved support plates 14 decreases until it is separated from the grooved support plates 14.

[0043] Furthermore, the top of the main battery pack 3 is fixedly connected to the suspension plate 12, and the two ends of the suspension plate 12 are slidably connected with a support plate 15, the support plate 15 is horizontally arranged, and the bottom of the support plate 15 is fixedly connected with a buckle plate 151 close to the free end, and a buckle groove of a U-shaped structure is opened on one side of the buckle plate 151, and the top of the groove-type support plate 14 is fixedly connected with a retaining shaft 141 that is buckled and matched with the buckle plate 151. The top here refers to the top when the opening of the groove-type support plate 14 is facing the main battery pack, and the buckle groove openings on the buckle plates 151 at both ends of the suspension plate 12 are facing opposite directions. The telescopic drive rod 13 is fixedly set at the bottom of the supporting plate 11 and is used for the sliding of the support plates 15 at both ends of the suspension plate 12. The function of the support plate 15 is to use the buckle plate 151 to block the downward swing of the groove-shaped support plate 14, so as to suspend the main battery pack 3. When the main battery pack 3 needs to be released, the support plates 15 at both ends of the suspension plate 12 are controlled to move in opposite directions. When the main battery pack 3 moves downward, it will push the groove-shaped support plate 14 to swing downward. When the groove-shaped support plate 14 swings down until the blocking shaft 141 thereon is disengaged from the buckle groove, the main battery pack 3 can be released and separated from the bottom of the vehicle body.

[0044] In this embodiment, preferably, the bottom of the carrier plate 11 is welded with a suspension shaft 111 near both ends through a hanging plate, a connecting sleeve 1421 sleeved on the suspension shaft 111 is welded in the middle of the middle plate 142 on the groove-type support plate 14, a clearance notch 143 is provided on the back of the groove-type support plate 14, and a baffle 1111 is fixedly connected to the outer wall of the suspension shaft 111 on one side and abutted against one end of the main battery pack 3. The clearance notch 143 is used to make way for the baffle 1111, and the main battery pack 3 can only move up and down under the restriction of the two baffles 1111. The bottom of the main battery pack 3 is fixedly connected with a rubber pad 31 near both ends and pressed against the bottom of the groove-type support plate 14. When in use, the rubber pad 31 plays a role of buffer support. It should be noted that when the main battery pack 3 moves up and drives the groove-type support plate 14 to swing up, the rubber pad 31 will be squeezed at this time, thereby preventing the main battery pack 3 from excessively moving up relative to the carrier plate 11.

[0045] In this embodiment, slideways 121 are provided at both ends of the suspension plate 12 for sliding cooperation with one end of the support plate 15. A transmission shaft 152 is welded on the top of the support plate 15 and passes through the suspension plate 12. The free end of the action rod 131 on the telescopic drive rod 13 is fixedly connected with an adapter sleeve 1311 sleeved on the outside of the transmission shaft 152. One telescopic drive rod 13 corresponds to one support plate 15. The adapter sleeve 1311 and the transmission shaft 152 can be slidably separated and cooperated. The separation cooperation here means that the transmission shaft 152 can be separated from the adapter sleeve 1311 when it slides downward. When the telescopic drive rod 13 is pushed, it will drive the support plates 15 at both ends of the suspension plate 12 to move in the opposite direction through the adapter sleeve 1311. Conversely, the support plates 15 at both ends of the suspension plate 12 move in the opposite direction. When the main battery pack 3 is released, the transmission shaft 152 may be separated from the adapter sleeve 1311. Among them, the telescopic drive rod 13 can be a cylinder or an oil cylinder.

[0046] In this embodiment, the switching module 6 includes a motherboard 61 and a male board 62. The motherboard 61 is arranged on the carrier board 11 and has an interface 611 at its bottom. The male board 62 is located below the motherboard 61 and is connected to the suspension board 12. The top of the male board 62 is provided with a connector 621 that is plugged with the interface 611. When the connector 621 and the interface 611 are plugged, the main battery pack 3 and the circuit adapter module 2 are electrically connected, otherwise they are electrically disconnected. A trigger switch 613 is provided at the bottom of the motherboard 61. When the trigger switch 613 is pressed, when the male board 62 and the motherboard 61 are docked, the trigger switch 613 is squeezed, and the trigger switch 613 is disconnected at this time, and the backup battery pack 4 and the circuit adapter module 2 are electrically disconnected. When the male board 62 and the motherboard 61 are separated, the trigger switch 613 is turned on, and the backup battery pack 4 and the circuit adapter module 2 are electrically connected, so as to realize the function that the main battery pack 3 and the backup battery pack 4 are not connected to the circuit adapter module 2 at the same time.

[0047] The monitoring module 5 mentioned above includes a controller, a carrying frame, a smoke sensor, a flame sensor and a temperature sensor, wherein the carrying frame is fixedly arranged between the hanging plates at both ends of the hanging plate 12, and the carrying frame is located above the main battery pack 3. The smoke sensor, the flame sensor and the temperature sensor are arranged at the bottom of the carrying frame and opposite to the main battery pack 3. The smoke sensor, the flame sensor and the temperature sensor transmit the measured data to the controller through the data line. The controller controls whether the telescopic drive rod 13 is actuated according to the set crisis value. At the same time, the controller also transmits a speed control signal to the vehicle power system through the circuit adapter module 2 according to the crisis value. For example, when the vehicle is driving at high speed and the main battery pack 3 has an abnormality, the controller will control the vehicle to decelerate to a safe speed, such as 25-35km / h, through the circuit adapter module 2.

[0048] Example 2

[0049] See also Figure 4 and Figure 5, and the difference from Example 1 is that the male plate 62 is a groove-type plate structure with an opening facing downward, and the two vertical plates 622 on the male plate 62 are elastically slidably connected to the two sides of the suspension plate 12 up and down, respectively. The elastic connection here refers to the arrangement of a support spring between the male plate 62 and the suspension plate 12. Under the action of the support spring, the male plate 62 has a tendency to move upward. This arrangement enables the male plate 62 and the female plate 61 to be closely connected. There are two support plates 15 located on the suspension plate 12, and a transmission cavity 122 connected to the slideway 121 is provided in the suspension plate 12. One end of the two support plates 15 extends into the transmission cavity 122, and the rotation connection in the transmission cavity 122 There are two intermediate shafts 1221 respectively located under the two support plates 15 and on both sides of the male plate 62. The two ends of the intermediate shaft 1221 are fixedly connected with a gear 2 12211 meshing with one side of the vertical plate 622. The intermediate shaft 1221 is fixedly sleeved with a gear 1 12212 meshing with the support plate 15. When the two support plates 15 move in opposite directions, the male plate 62 will be driven to descend through the intermediate shaft 1221. The function of this setting is to separate the buffer joint 621 and the interface 611 before the main battery pack 3 is completely released, so as to avoid damage to the interface 611 when the main battery pack 3 is released, and it has the advantage of protecting the interface 611.

[0050] Example 3

[0051] See also Figure 2 , Figure 7 and Figure 8 , based on the difference between Example 1 and Example 2, the action rod 131 is connected in series with an elastic telescopic damping rod 1312, and the motherboard 61 and the carrier plate 11 are elastically slidably connected up and down. This setting enables the main battery pack 3 to have a buffering effect on the upward movement relative to the carrier plate 11. When the main battery pack 3 moves up relative to the carrier plate 11, the groove-shaped support plate 14 will swing up, and the elastic telescopic damping rod 1312 will extend and push the support plate 15 to slide outward, so that the buckle groove on the buckle plate 151 will not be separated from the blocking shaft 141, so that the support plate 15 and the groove-shaped support plate 14 are stably buckled. This setting has the effect of buffering the bottom impact displacement of the main battery pack 3, and can effectively avoid abnormal problems (such as leakage and fire) caused by the bottom impact of the main battery pack 3. The function of the elastic sliding connection setting between the motherboard 61 and the carrier plate 11 is that the wet motherboard 61 can follow the male plate 62 to move in a short stroke.

[0052] Among them, the elastic telescopic shock-absorbing rod 1312 includes a sleeve 13121, a shock-absorbing spring 13122 and a pressure plate 13123. The shock-absorbing spring 13122 and the pressure plate 13123 are both sleeved in the sleeve 13121. One end of the sleeve 13121 is provided with a through hole opposite to the pressure plate 13123. One side of the pressure plate 13123 is welded and connected to the adapter sleeve 1311 through a short-circuit shaft 131231 of the through hole. One end of the sleeve 13121 is welded and connected to one end of the action rod 131. The tops of both sides of the motherboard 61 are connected to the top of the supporting plate 11 through the elastic telescopic pull rod 612. The elastic telescopic pull rod 612 is a telescopic rod structure with two sections of built-in springs.

[0053] Working principle: During use, when the monitoring module 5 detects that the main battery pack 3 is on fire, the main battery pack 3 needs to be released to separate it from the bottom of the car. The controller in the monitoring module 5 will control the return of the telescopic drive rod 13, and the support plates 15 at both ends of the suspension plate 12 will move in opposite directions. The main battery pack 3 will use its own weight to drive the grooved support plates 14 at both ends to swing down, and at the same time, the rubber pads 31 at the bottom of the main battery pack 3 will slide in the opposite direction to the mouth of the grooved support plate 14. In this process, under the transmission of the intermediate shaft 1221, the male plate 62 moves down, the joint 621 and the interface 611 are separated, and the trigger switch 613 is turned on. When the height of the blocking shaft 141 is lower than the height of the suspension shaft 111, the grooved support plate 14 will use its own weight (due to the weight of the blocking shaft 141) to swing down so that the blocking shaft 141 on it directly separates from the buckle groove on the buckle plate 151. At this time, the entire main battery pack 3 is separated from the car, and the bottom will contact the ground with a small distance. The rubber pads 31 at the bottom of the main battery pack 3 play a role in buffering the impact of the ground. This enables management of the main battery pack 3 being separated from the vehicle when an abnormality occurs.

[0054] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A battery management system for a new energy vehicle, characterized in that: The invention comprises a suspension module (1), a circuit switching module (2), a main battery pack (3), a backup battery pack (4), a monitoring module (5) and a switching module (6), wherein the suspension module (1) is used to suspend the main battery pack (3) and carry the backup battery pack (4), the circuit switching module (2) is used to supply the electric energy of the main battery pack (3) and the backup battery pack (4) to the vehicle power system at different times, the monitoring module (5) is used to monitor the main battery pack (3) on the suspension module (1), when the main battery pack (3) is on fire, has a high temperature or smoke, the suspension module (1) releases the main battery pack (3) downward, the switching module (6) is connected to the circuit switching module (2), the switching module (6) controls the main battery pack (3) and the backup battery pack (4) to be connected to the circuit switching module (2) at different times, and when the main battery pack (3) is released, the switching module (6) controls the backup battery pack (4) to be connected to the circuit switching module (2).

2. A battery management system for a new energy vehicle according to claim 1, characterized in that: The suspension module (1) comprises a load-bearing plate (11), a suspension plate (12), a telescopic driving rod (13), a grooved support plate (14) and a support plate (15); the number of the grooved support plates (14) is two and the middle parts of the two grooved support plates are rotatably connected to the bottom of the load-bearing plate (11) near the two ends respectively; the main battery pack (3) is located below the load-bearing plate (11) and its two ends extend into the adjacent grooved support plates (14); the top of the main battery pack (3) is fixedly connected to the suspension plate (12); the suspension The two ends of the plate (12) are slidably connected with a support plate (15), the bottom of the support plate (15) is fixedly connected with a buckle plate (151) close to the free end, the top of the groove-shaped support plate (14) is fixedly connected with a stop shaft (141) that is buckled and matched with the buckle plate (151), the buckle groove openings on the buckle plates (151) at both ends of the suspension plate (12) face opposite directions, and the telescopic driving rod (13) is fixedly arranged at the bottom of the supporting plate (11) and is used for the sliding of the support plates (15) at both ends of the suspension plate (12).

3. A battery management system for a new energy vehicle according to claim 2, characterized in that: The bottom of the carrier plate (11) is welded with a suspension shaft (111) near both ends through a hanging plate, a connecting sleeve (1421) sleeved on the suspension shaft (111) is welded in the middle of the middle plate (142) on the groove-shaped support plate (14), a recess (143) is provided on the back of the groove-shaped support plate (14), a baffle (1111) whose one side is in contact with one end of the main battery pack (3) is fixedly connected to the outer wall of the suspension shaft (111), and a rubber pad (31) near both ends and pressed against the inner bottom of the groove-shaped support plate (14) is fixedly connected to the bottom of the main battery pack (3).

4. A battery management system for a new energy vehicle according to claim 3, characterized in that: Both ends of the suspension plate (12) are provided with slideways (121) which are slidably matched with one end of the support plate (15); a transmission shaft (152) which passes through the suspension plate (12) through a gap is welded on the top of the support plate (15); the free end of the action rod (131) on the telescopic drive rod (13) is fixedly connected with an adapter sleeve (1311) which is sleeved on the outside of the transmission shaft (152); the adapter sleeve (1311) and the transmission shaft (152) are slidably matched.

5. A battery management system for a new energy vehicle according to claim 4, characterized in that: The switching module (6) comprises a motherboard (61) and a male board (62); the motherboard (61) is arranged on the carrier board (11) and has an interface (611) at its bottom; the male board (62) is located below the motherboard (61) and is connected to the suspension board (12); a connector (621) which is plugged into and matched with the interface (611) is arranged at the top of the male board (62); and a trigger switch (613) is arranged at the bottom of the motherboard (61).

6. A battery management system for a new energy vehicle according to claim 5, characterized in that: The male plate (62) is a grooved plate structure with an opening facing downward. The two vertical plates (622) on the male plate (62) are elastically slidably connected to the two sides of the suspension plate (12) in an upper and lower direction respectively. The number of the support plates (15) located on the suspension plate (12) is two. A transmission cavity (122) connected to the slideway (121) is provided in the suspension plate (12). One end of the two support plates (15) extends into the transmission cavity (122). Two intermediate shafts (1221) located below the two support plates (15) and on both sides of the male plate (62) are rotatably connected in the transmission cavity (122). The two ends of the intermediate shaft (1221) are fixedly connected with a gear 2 (12211) meshing with one side of the vertical plate (622). The intermediate shaft (1221) is fixedly sleeved with a gear 1 (12212) meshing with the support plate (15).

7. A battery management system for a new energy vehicle according to claim 6, characterized in that: The action rod (131) is serially connected with an elastic telescopic shock-absorbing rod (1312), and the motherboard (61) and the bearing plate (11) are elastically slidably connected up and down.

8. A battery management system for new energy vehicles according to claim 7, characterized in that: The elastic telescopic shock-absorbing rod (1312) comprises a sleeve (13121), a shock-absorbing spring (13122) and a pressure plate (13123); the shock-absorbing spring (13122) and the pressure plate (13123) are both sleeved in the sleeve (13121); one end of the sleeve (13121) is provided with a through hole opposite to the pressure plate (13123); one side of the pressure plate (13123) is welded and connected to a short-circuited shaft (131231) of the through hole and an adapter sleeve (1311); one end of the sleeve (13121) is welded and connected to one end of the action rod (131); and the tops of both sides of the motherboard (61) are connected to the top of the supporting plate (11) through the elastic telescopic pull rod (612).

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