A new energy automobile battery pack charging and discharging detection device

Abstract

This invention discloses a charging and discharging testing device for new energy vehicle battery packs, relating to the field of new energy batteries. It includes two parallel moving tracks, each connected to a synchronously running slider. The sliders are connected to a placement box and a sealing box, respectively. The sealing box is connected to its corresponding slider via a telescopic rod. The inside of the sealing box is connected to a heating mechanism. A connecting mechanism is provided inside the placement box, connecting to a power source and a load. The placement box and sealing box cooperate to enclose the battery pack within them. The sealing box is connected to the heating mechanism, which gradually heats the interior of both the placement box and the sealing box, enabling the measurement of charging and discharging rates under different temperature conditions. The placement box and sealing box are connected to sliders, which slide relative to the moving tracks, allowing for continuous testing while moving. This provides efficient testing in mass battery production.

Description

Technical Field

[0001] This invention relates to the field of new energy batteries, specifically to a charging and discharging detection device for new energy vehicle battery packs. Background Technology

[0002] Testing is required during the production of new energy vehicle battery packs, including appearance and charge / discharge performance testing. Charge / discharge performance testing includes capacity, rate discharge, internal resistance, cycle life, etc. It also includes discharge load testing to determine the discharge stability. Current technology uses data acquisition to determine battery performance by collecting and analyzing current data during battery charging and discharging.

[0003] Patent application CN114859249A discloses a method and apparatus for detecting battery capacity. The method includes obtaining capacity detection data of a target battery pack using the ampere-hour integration method; importing the capacity detection data into a preset LSTM algorithm model group to determine a target LSTM algorithm model; and detecting the capacity of multiple battery packs under test based on the target LSTM algorithm model. This application solves the technical problems of long detection time and high detection cost in the prior art when detecting battery pack capacity, by establishing a preset LSTM algorithm model group with protected segmented LSTM algorithm models, matching the capacity detection data of the target battery pack with the LSTM algorithm models in the preset LSTM algorithm model group, and using the matched target LSTM algorithm model to detect the capacity and battery capacity of a batch of battery packs under test. This achieves the technical effect of improving battery pack detection efficiency and accuracy, and reducing battery pack detection costs.

[0004] However, since the charging and discharging rates and capacity of car batteries vary at different temperatures, and car batteries also require heating devices to preheat them in actual use, there is a problem with inaccurate data when tested at room temperature. Summary of the Invention

[0005] The purpose of this invention is to provide a charging and discharging detection device for new energy vehicle battery packs to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A charging and discharging testing device for new energy vehicle battery packs includes two parallel moving tracks, each connected to a synchronously running slider. The sliders are connected to a placement box and a sealing box, respectively. The sealing box is connected to the corresponding slider via a telescopic rod. The inside of the sealing box is connected to a heating mechanism. A connecting mechanism is provided inside the placement box, connecting to a power source and a load. The placement box and sealing box cooperate to enclose the battery pack within them. The sealing box is connected to the heating mechanism, which gradually heats the interior of both the placement box and the sealing box, enabling the measurement of charging and discharging rates under different temperature conditions. The placement box and sealing box are connected to the sliders, which slide relative to the moving tracks, allowing for continuous testing while moving. This provides efficient testing in mass battery production. The connecting mechanism inside the placement box connects the power source or load to the battery pack, enabling charging or discharging testing.

[0008] Preferably, the moving track is an oblong track, and the heating mechanism includes a charging / discharging chamber disposed inside one of the moving tracks. A partition is slidably connected inside the charging / discharging chamber. One side of the charging / discharging chamber is connected to the sealed box through a heating pipe, and the other side of the charging / discharging chamber is connected to the airbag inside the sealed box through an exhaust pipe. The moving track is oblong so that the slider sliding on it can reciprocate. The charging / discharging chamber in the heating mechanism is connected to the heating pipe and the exhaust pipe respectively, and a slidable partition is provided therein. The movement of the partition can control the hot or cold air to enter the space formed by the placement box and the sealed box, adjust the ambient temperature of the battery, test the charging and discharging performance under the corresponding environment, and recover the hot air flow in the sealed box to reduce energy loss.

[0009] Preferably, the heating pipe is equipped with a heating wire, the partition is threadedly connected to the output shaft of the heating motor connected to the outside of the charging and discharging chamber, the telescopic rod includes a sleeve fixedly connected to the slider, a sliding rod is slidably connected inside the sleeve, the sleeve is connected to the heating pipe, the sliding rod is hollow inside and the end of the sliding rod is connected to the inside of the sealed box, the airflow enters the heating pipe from the heat storage side of the charging and discharging chamber, is heated in the heating pipe and then enters the sealed box to heat the battery pack, the sealed box and the slider are connected by the telescopic rod, so that the sealed box can move horizontally relative to the placement box, thereby sealing the placement box to allow for ventilation.

[0010] Preferably, the end of the slide rod located inside the sleeve is slidably connected to the closed box. The closed box abuts against the stop bar fixed inside the sleeve. The end of the slide rod located inside the sleeve is a closed structure with air holes on the side. Under pressure, the slide rod first drives the closed box to slide until it abuts against the placement box before inflating it to prevent heat loss caused by heat leakage.

[0011] Preferably, the connecting mechanism includes a fixed rod fixed inside the placement box. The fixed rod is hollow inside, and a sliding sleeve is slidably connected inside the fixed rod. The sliding sleeve is connected to a wire, and the sliding sleeve and the fixed rod are connected by a spring. The connecting mechanism uses a sliding sleeve inserted into the fixed rod. After the closed box and the placement box are closed together, under the internal stamping state, the sliding sleeve slides outward relative to the fixed rod. The contact of the sliding sleeve is connected to the wire, which enables the contact connected to the inner end of the sliding sleeve to abut against the charging and discharging connector of the battery pack.

[0012] Preferably, the moving track connected to the placement box is equipped with a charging guide rod and a discharging guide rod. The charging guide rod is connected to the power source, and the discharging guide rod is connected to the load. The wire contacts the charging guide rod and the discharging guide rod through a sliding contact sleeve. The wire is connected to a brush. When the slider moves below the moving track, the brush contacts the charging guide rod. When the slider moves above the moving track, the brush contacts the discharging guide rod, thus realizing charge and discharge detection.

[0013] Preferably, the charging guide rod and the discharging guide rod are fixed to the moving track by an insulating bracket, and the wires are spirally wound inside the fixed rod. The spiral wires are located inside the fixed rod and can adapt to the extension and retraction of the sliding sleeve.

[0014] Preferably, the slider is rotatably connected to rollers on both sides of the moving track. The rollers are coaxially fixedly connected to the output shaft of the drive motor. The two sliders are connected by a connecting rod. The rollers connected to the drive motor on the inner side of the slider rotate relative to the moving guide rail. The movement of the slider is controlled by controlling the speed of the drive motor, that is, the charging and discharging time is controlled.

[0015] Preferably, there are at least two sets of sliders, each set of sliders is connected to a placement box and a sealing box respectively, and a roller is provided on the side of the placement box. Multiple sets of sliders are provided to realize the simultaneous detection of multiple battery packs.

[0016] Preferably, the heating mechanism includes a filling and defilling chamber disposed inside one of the moving tracks. The filling and defilling chamber is cylindrical, and a rotating ring is located on the side of the filling and defilling chamber for sealing and rotation. The inside of the rotating ring is connected to the sealed box through a heating pipe. The filling and defilling chamber in the heating mechanism is cylindrical and connected to the rotating ring. The heating pipe and the exhaust pipe are flexible hoses, which can ensure that the heating mechanism is always connected to the inside of the sealed box during the sliding process of the slider.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] A cavity for placing the battery pack is formed by combining a placement box and a sealing box. This cavity is connected to a heating mechanism. The heating mechanism supplies heat to allow the battery pack to be charged and discharged under a certain temperature environment in order to obtain relatively accurate values.

[0019] The slider is connected to the moving track in a sliding manner, and at least two sets of sliders are set up, which can detect at least two sets of batteries at the same time, thus improving the detection efficiency in the detection of large batches of batteries.

[0020] The sealed box uses a telescopic rod connected to a slider. The sliding rod in the telescopic rod slides outward after the pressure of the heating pipe increases, causing the sealed box to slide until it fits against the placement box. Then, hot air is supplied to the sealed cavity. An airbag is connected inside the sealed box. The airbag is connected to the charging and discharging chamber through an exhaust pipe. When the separator moves, the space on the side of the separator connected to the exhaust pipe increases, allowing the cold air in the airbag to enter the charging and discharging chamber. When the separator moves in the opposite direction, it can send the cold air into the airbag and force the hot air into the side of the separator where the hot air is stored. This can reduce heat loss when replacing the battery pack being tested. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the structure of the placement box of the present invention;

[0023] Figure 3 This is a cross-sectional view of the placement box of the present invention;

[0024] Figure 4 This is a schematic diagram of the structure of the sealed box of the present invention;

[0025] Figure 5 This is a cross-sectional view of the telescopic rod of the present invention;

[0026] Figure 6 This is a schematic diagram of the heating mechanism of the present invention;

[0027] Figure 7 This is a cross-sectional view of the inflation / deflation chamber of the present invention.

[0028] In the diagram: 1. Moving track; 2. Slider; 21. Drive motor; 22. Roller; 3. Placement box; 31. Roller; 32. Fixing rod; 33. Sliding sleeve; 4. Enclosed box; 41. Airbag; 42. Telescopic rod; 421. Sleeve rod; 4211. Empty groove; 4212. Stop bar; 422. Sliding rod; 4221. Air hole; 4222. Sliding groove; 5. Heating mechanism; 51. Heating pipe; 52. Exhaust pipe; 53. Inflation / discharge chamber; 531. Through hole; 54. Rotary ring; 55. Partition plate; 56. Screw; 57. Heating motor; 6. Discharge guide rod; 7. Charging guide rod; 8. Wire; 9. Brush. Detailed Implementation

[0029] Example 1

[0030] like Figure 1-7As shown, a new energy vehicle battery pack charging and discharging testing device includes two parallel moving tracks 1, with synchronously running sliders 2 connected to each track 1. The two sliders 2 are respectively connected to a placement box 3 and a sealing box 4. The sealing box 4 is connected to the corresponding slider 2 via a telescopic rod 42. The inner side of the sealing box 4 is connected to a heating mechanism 5. A connecting mechanism is provided inside the placement box 3, which is connected to a power source and a load. The moving tracks 1 are waist-shaped annular tracks. The heating mechanism 5 includes a charging / discharging chamber 53 disposed inside one of the moving tracks 1. A partition 55 is slidably connected inside the charging / discharging chamber 53. The heating pipe 51 connects to the sealed box 4 on one side, and the air filling and deflating chamber 53 is connected to the air bladder 41 inside the sealed box 4 through the exhaust pipe 52 on the other side. The heating pipe 51 is equipped with an electric heating wire. The partition 55 is threadedly connected to the output shaft of the heating motor 57 connected to the outside of the air filling and deflating chamber 53. The telescopic rod 42 includes a sleeve fixedly connected to the slider 2. The slide rod 422 is slidably connected inside the sleeve. The sleeve is connected to the heating pipe 51. The slide rod 422 is hollow inside and its end is connected to the inside of the sealed box 4. The end of the slide rod 422 located inside the sleeve is slidably connected to the sealed box 4. The sealed box 4 abuts against the stop bar 4212 fixed inside the sleeve.

[0031] During testing, the battery pack is conveyed into the placement box 3. Then, the telescopic rod 42 is compressed and extends. The slide rod 422 within the telescopic rod 42 slides inside the sleeve. The closed box 4 connected to the slide rod 422 slides towards one side of the placement box 3. The closed box 4 is L-shaped. The closed box 4 slides until it abuts against the placement box 3. Simultaneously, the slide rod 422 communicates with the inside of the sleeve, and the sleeve is connected to the heating pipe 51. One end of the slide rod 422 inside the sleeve is closed, and the other end... The sleeve is provided with an air hole 4221 and a sliding groove 4222. The sliding groove 4222 cooperates with a stop rod 4212 fixed inside the sleeve. The stop rod 4212 is set in a hollow groove 4211 inside the sleeve. When the internal pressure of the sleeve increases, the sliding rod 422 slides under pressure, and the sliding groove 4222 slides relative to the stop rod 4212 until the air hole 4221 is located in the hollow groove 4211, so that the inside of the sliding rod 422 is connected to the sleeve to realize air inflation. The airflow inside the inflation / deflation chamber 53 passes through the heating pipe. The heating wire in section 51 heats the battery within the cavity formed between the sealed box 4 and the placement box 3. Simultaneously, the connecting mechanism connects to the battery pack, enabling the battery pack to conduct electricity. When slider 2 moves below the moving track 1, the connecting mechanism performs a charging test; when slider 2 moves above the moving track 1, it performs a discharging test. After the test, to recover the heat in the cavity between the sealed box 4 and the placement box 3, the partition 55 in the charging / discharging chamber 53 of the heating mechanism 5 moves towards the exhaust pipe 52 under the drive of the screw 56 driven by the heating motor 57. The airbag 41 expands, squeezing the airflow between the placement box 3 and the sealed box 4 into the other side of the partition 55 in the charging / discharging chamber 53, thus recovering heat. This allows for reuse of the heat during the next test, reducing energy consumption. During charging, the connecting mechanism connects to the power supply; during discharging, the connecting mechanism connects to the load.

[0032] Example 2

[0033] like Figure 1-7As shown, a new energy vehicle battery pack charging and discharging testing device includes two parallel moving tracks 1, with synchronously running sliders 2 connected to each track 1. The two sliders 2 are respectively connected to a placement box 3 and a sealing box 4. The sealing box 4 is connected to the corresponding slider 2 via a telescopic rod 42. The inner side of the sealing box 4 is connected to a heating mechanism 5. A connecting mechanism is provided inside the placement box 3, which is connected to a power source and a load. The connecting mechanism includes a fixed rod 32 fixed inside the placement box 3. The fixed rod 32 is hollow inside, and a sliding sleeve 33 is slidably connected inside the fixed rod 32. The sliding sleeve 33 is connected to a wire 8, and the sliding sleeve 33 and the fixed rod 32 are connected by a spring. A charging guide rod 7 and a discharging guide rod 6 are connected inside the moving track 1 connected to the placement box 3. The charging guide rod 7 is connected to the power source, and the discharging guide rod 6 is connected to the load. The wire 8 contacts the charging guide rod 7 and the discharging guide rod 6 via a sliding contact sleeve. The charging guide rod 7 and the discharging guide rod 6 are fixed to the moving track 1 by an insulating bracket, and the wire 8 is spirally wound inside the fixed rod 32.

[0034] In the connecting mechanism, a sliding sleeve 33 is slidably connected to the hollow part of the fixed rod 32 fixedly connected to the placement box 3. A wire 8 runs through the inside of the sliding sleeve 33 and connects to the contact head. The wire 8 is spiral inside the fixed rod 32, which can meet the length required for the sliding sleeve 33 to slide, and can also provide a certain elasticity to the sliding sleeve 33 under normal pressure, so that the sliding sleeve 33 is in an extended state. This makes it convenient for the contact head to be located on one side of the battery connection connector when the battery enters the placement box 3. When the slider 2 moves, the brush 9 connector fixed on one side of the placement box 3 is connected to the wire 8. The brush 9 is connected to the charging conductor fixed on the moving track 1. When rod 7 contacts, charging guide rod 7 is connected to power supply and detection equipment. As slider 2 moves with drive motor 21, brush 9 slides relative to charging guide rod 7 while charging detection is performed. When slider 2 continues to slide to above moving track 1, brush 9 contacts discharge guide rod 6. Discharge guide rod 6 is connected to load and detection equipment for discharge detection. When the internal pressure of sliding sleeve 33 increases after the closed box 4 is closed, sliding sleeve 33 slides outward relative to fixed rod 32 under pressure, so that the contact connected to sliding sleeve 33 abuts against the connector on battery pack.

[0035] Example 3

[0036] like Figure 1-7As shown, a new energy vehicle battery pack charging and discharging testing device includes two parallel moving tracks 1, with synchronously running sliders 2 connected to the two moving tracks 1 respectively. The two sliders 2 are respectively connected to a placement box 3 and a sealing box 4. The sealing box 4 is connected to the corresponding slider 2 via a telescopic rod 42. The inner side of the sealing box 4 is connected to a heating mechanism 5. A connecting mechanism is provided inside the placement box 3, which is connected to a power source and a load. The sliders 2 are rotatably connected to rollers 22 on both sides of the moving tracks 1. The rollers 22 are coaxially fixedly connected to the output shaft of the drive motor 21. The two sliders 2 are connected by a connecting rod. There are at least two sets of sliders 2. Each set of sliders 2 is respectively connected to the placement box 3 and the sealing box 4. Rollers 31 are provided on the side of the placement box 3. The heating mechanism 5 includes a charging and discharging chamber 53 disposed inside one of the moving tracks 1. The charging and discharging chamber 53 is cylindrical. A rotating ring 54 is rotatably connected to the side of the charging and discharging chamber 53. The inside of the rotating ring 54 is connected to the sealing box 4 via a heating pipe 51.

[0037] The sliders 2 on the two moving tracks 1 are connected by a connecting rod, so that the two sliders 2 can move synchronously. This avoids the sealed box 4 and the placement box 3 being misaligned, which would cause the cavity to not be tightly sealed and thus result in heat loss. The placement box 3, the sealed box 4, the heating pipe 51, the charging and discharging chamber 53, and the air bag 41 are all made of heat-insulating material. The inner side of the slider 2 is connected to the moving track 1 through the connecting roller 22, which changes the sliding friction to rolling friction, reducing frictional resistance and the energy consumed by friction. At least two sets of sliders 2 are set, which can simultaneously and continuously test multiple batteries. This is suitable for mass battery testing in battery production. The side of the placement box 3 is connected to the roller 31, which facilitates the entry and exit of the battery pack. The charging and discharging chamber 53 is set as a cylinder and is rotatably connected to the rotating ring 54 at the side through hole 531, so that the heating pipe 51 is always connected to the charging and discharging chamber 53 as it slides with the slider 2, so as to adjust the internal temperature of the placement box 3 in a timely manner.

Claims

1. A charging and discharging detection device for a new energy vehicle battery pack, characterized in that, It includes two parallel moving tracks, each connected to a synchronously running slider. The two sliders are connected to a placement box and a sealing box, respectively. The sealing box is connected to the corresponding slider via a telescopic rod and is connected to the heating mechanism via the telescopic rod. The placement box is equipped with a connecting mechanism. During charging detection, the connecting mechanism is connected to the power supply. During discharging detection, the connecting mechanism is connected to the load. The moving track is an oblong track. The heating mechanism includes an inflation / deflation chamber with a slidably connected partition inside. One side of the inflation / deflation chamber is connected to a telescopic rod via a heating pipe, and the other side is connected to an air bladder inside the sealed box via an exhaust pipe. A heating wire is installed inside the heating pipe. The partition is threadedly connected to the output shaft of a heating motor connected to the outside of the inflation / deflation chamber. The telescopic rod includes a sleeve fixedly connected to a slider. A sliding rod is slidably connected inside the sleeve. The sleeve is connected to the heating pipe. The sliding rod is hollow inside, and its end is connected to the inside of the sealed box. One end of the sliding rod inside the sleeve is closed. An air hole and a groove are provided on the side of the sliding rod. The groove cooperates with a stop fixed inside the sleeve. The stop is located in a hollow groove inside the sleeve. When the pressure inside the sleeve increases, the sliding rod slides under pressure, and the groove slides relative to the stop until the air hole is in the hollow groove, allowing the inside of the sliding rod to communicate with the sleeve and achieve inflation.

2. The charging and discharging detection device for a new energy vehicle battery pack according to claim 1, characterized in that, The connecting mechanism includes a fixed rod fixed inside the placement box. The fixed rod is hollow inside, and a sliding sleeve is slidably connected inside the fixed rod. The sliding sleeve is connected to a wire, and the sliding sleeve and the fixed rod are connected by a spring. A charging guide rod and a discharging guide rod are connected to the side of the moving track connected to the placement box away from the closed box. The charging guide rod is connected to the power source, and the discharging guide rod is connected to the load. The wire contacts the charging guide rod and the discharging guide rod through the sliding contact sleeve. The charging guide rod and the discharging guide rod are fixed to the moving track by an insulating bracket, and the wire is spirally wound inside the fixed rod.

3. The charging and discharging detection device for a new energy vehicle battery pack according to claim 1, characterized in that, The sliders are rotatably connected to rollers on both sides of the moving track. The rollers are connected to the output shaft of the drive motor, and the two sliders are connected by a connecting rod.

4. The charging and discharging detection device for a new energy vehicle battery pack according to claim 3, characterized in that, The slider has at least two sets, and each set of sliders is respectively connected to the placement box and the sealing box, with rollers provided on the side of the placement box.

5. The charging and discharging detection device for a new energy vehicle battery pack according to claim 4, characterized in that, The inflation / deflation chamber is cylindrical, with a sealed rotating connection ring located on the side of the chamber. The interior of the ring is connected to the casing via a heating pipe.

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