Low-temperature charging monitoring device for power battery pack

Abstract

The utility model discloses a low-temperature charging monitoring device for a power battery pack, which comprises a low-temperature test box, a wire holder with a hollow structure is fixedly connected inside the low-temperature test box, the top of the wire holder is fixedly communicated with a T-shaped wiring pipe, and the outer wall of the T-shaped wiring pipe is rotatably sleeved with a butt joint sleeve. By arranging the wire holder, the T-shaped wiring pipe, the butt joint sleeve, the bearing seat, the electric slip ring, the jack, the bolt, the top column and the partition plate, the plurality of power battery pack bodies can be conveniently charged at a low temperature, and meanwhile, chain reaction caused by short-circuit fire of the plurality of power battery pack bodies is avoided; by arranging the electric push rod, the metal plate, the L-shaped pipe, the smoke sensor and the explosion-proof glass frame, the explosion-proof glass frame covers the power battery pack bodies, diffusion is prevented after the power battery pack bodies are short-circuited and are on fire, and the smoke sensor monitors the short-circuited and on-fire smoke phenomenon in the charging process.

Description

Technical Field

[0001] The utility model relates to the technical field of power battery packs, and in particular to a low-temperature charging monitoring device for a power battery pack. Background Art

[0002] A power battery pack is composed of more than one battery cell connected in parallel or in series, usually encapsulated in a physically independent battery housing, and has independent positive and negative outputs. The charge and discharge performance of a power battery pack is closely related to temperature. In a low temperature environment, the chemical reaction rate inside the power battery pack will decrease, resulting in a decrease in the battery's capacity and output power. Therefore, low temperature testing of the battery can evaluate its performance at different temperatures.

[0003] In the prior art, when a power battery pack is charged at low temperature, the diffusion of lithium ions on the graphite negative electrode is inhibited, resulting in the growth of lithium dendrites. These dendrites may pass through the diaphragm and cause an internal short circuit, or react with the electrolyte to cause heat release, further causing a battery fire. Therefore, we propose a power battery pack low temperature charging monitoring device to solve the above problems. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a low-temperature charging monitoring device for a power battery pack.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A low-temperature charging monitoring device for a power battery pack comprises a low-temperature test chamber, wherein a wiring socket with a hollow structure is fixedly connected inside the low-temperature test chamber, a T-shaped wiring tube is fixedly connected to the top of the wiring socket, a butt sleeve is rotatably provided on the outer wall of the T-shaped wiring tube, a supporting seat with a hollow structure is fixedly connected to the top of the butt sleeve, an assembly hole is provided at the bottom of the supporting seat, an electric slip ring is fixedly connected to the inner wall of the assembly hole, a top column is fixedly connected to the top of the supporting seat, four partitions are fixedly connected to the outer wall of the top column, a plurality of power battery pack bodies are placed on the top of the supporting seat, and a protective mechanism is provided inside the low-temperature test chamber.

[0007] Preferably, the protective mechanism includes a metal plate, an electric push rod is fixedly connected to the interior of the low-temperature test box, the bottom of the output end of the electric push rod is fixedly connected to the top of the metal plate, the bottom of the metal plate is fixedly connected to an explosion-proof glass frame, and the top of the metal plate has two L-shaped tubes fixedly connected to each other. When the power battery pack body catches fire, the nozzle of the carbon dioxide fire extinguisher extends into the L-shaped tube, and there is no need to open the explosion-proof glass frame to perform fire extinguishing operations, thereby protecting the safety of users during the fire extinguishing process.

[0008] Preferably, the outer wall of the T-shaped wiring tube is provided with a plurality of insertion holes, the outer wall of the docking sleeve is provided with a sliding hole, the inner wall of the sliding hole is slidably connected with a latch, and the docking sleeve is fixed to the T-shaped wiring tube by providing the latch.

[0009] Preferably, the bottoms of the four partitions are fixedly connected to the top of the supporting seat, and the four partitions are provided to facilitate separation of multiple power battery pack bodies.

[0010] Preferably, the outer wall of the supporting seat is provided with a plurality of mounting holes, and the inner walls of the plurality of mounting holes are fixedly connected with charging cables, which are connected to the poles on the power battery pack body through the terminals on the charging cables to realize subsequent charging operations.

[0011] Preferably, a protective door is hinged on the outer wall of the low-temperature test box.

[0012] Preferably, the outer wall of the metal plate is provided with two through holes, and the inner walls of the two through holes are fixedly connected with smoke sensors. When the smoke sensor is working, the internal transmitter will emit a beam of infrared light or laser. In the absence of smoke, the light will directly reach the connector, and when smoke is present, the smoke particles will cause the light to be scattered and absorbed.

[0013] Compared with the prior art, the advantages of the utility model are:

[0014] This solution provides a terminal block, a T-shaped terminal tube, a docking sleeve, a supporting seat, an electric slip ring, a jack, a pin, a top column and a partition, so that multiple power battery packs can be charged at low temperatures to facilitate performance, while avoiding a chain reaction caused by short circuits and fires of multiple power battery packs. By providing an electric push rod, a metal plate, an L-shaped tube, a smoke sensor and an explosion-proof glass frame, the explosion-proof glass frame covers the multiple power battery packs to prevent the spread after a short circuit and fire occurs in the power battery packs, and the smoke sensor monitors the smoke phenomenon caused by short circuits and fires during charging. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the description of the specific implementation methods will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 This is a schematic cross-sectional structure diagram of a low-temperature charging monitoring device for a power battery pack proposed by the utility model;

[0017] Figure 2 A low temperature charging monitoring device for a power battery pack proposed by the utility model Figure 1 A schematic diagram of the enlarged structure of part A;

[0018] Figure 3 It is a partial three-dimensional structural schematic diagram of a power battery pack low-temperature charging monitoring device proposed by the utility model.

[0019] In the figure: 1. Low temperature test chamber; 2. Terminal block; 3. T-shaped terminal tube; 4. Docking sleeve; 5. Support seat; 6. Electric slip ring; 7. Socket; 8. Pin; 9. Top column; 10. Partition; 11. Power battery pack body; 12. Electric push rod; 13. Metal plate; 14. L-shaped tube; 15. Smoke sensor; 16. Explosion-proof glass frame. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Depend on Figure 1-Figure 3 As shown, it relates to a low-temperature charging monitoring device for a power battery pack, including a low-temperature test box 1, the outer wall of the low-temperature test box 1 is hinged with a protective door, the interior of the low-temperature test box 1 is fixedly connected with a wiring seat 2 with a hollow structure, the top of the wiring seat 2 is fixedly connected with a T-shaped wiring tube 3, the outer wall of the T-shaped wiring tube 3 is rotatably sleeved with a docking sleeve 4, the top of the docking sleeve 4 is fixedly connected with a supporting seat 5 with a hollow structure, the top of the wiring seat 2 is fixedly connected with a circular ring, and the top of the circular ring supports the supporting seat 5.

[0022] The outer wall of the supporting seat 5 is provided with multiple mounting holes, and the inner walls of the multiple mounting holes are fixedly connected with charging cables, one end of the charging cable is installed with a terminal, and the other end of the charging cable is fixedly connected to the electric slip ring 6. The bottom of the supporting seat 5 is provided with an assembly hole, and the inner wall of the assembly hole is fixedly connected with the electric slip ring 6. The bottom of the electric slip ring 6 is fixedly connected with a power cord, and the power cord is connected to an external power supply.

[0023] The outer wall of the T-shaped wiring tube 3 is provided with a plurality of jacks 7, the outer wall of the docking sleeve 4 is provided with a sliding hole, the inner wall of the sliding hole is slidably connected with a plug 8, the plug 8 fixes the docking sleeve 4 on the T-shaped wiring tube 3, the top of the supporting seat 5 is fixedly connected with a top column 9, the outer wall of the top column 9 is fixedly connected with four partitions 10, the four partitions 10 are supported by the top column 9, the bottoms of the four partitions 10 are fixedly connected to the top of the supporting seat 5, a plurality of power battery pack bodies 11 are placed on the top of the supporting seat 5, and the power battery pack bodies 11 are equipped with poles.

[0024] A protective mechanism is provided inside the low-temperature test box 1, and the protective mechanism includes a metal plate 13. Two through holes are provided on the outer wall of the metal plate 13. Smoke sensors 15 are fixedly connected to the inner walls of the two through holes. The smoke sensor 15 (DS-1T228N) emits a beam of infrared light or laser through an internal transmitter. In the absence of smoke, the light will directly reach the connector. When smoke is present, the smoke particles will scatter and absorb the light, thereby monitoring the fire of the power battery pack body 11.

[0025] An electric push rod 12 is fixedly connected to the interior of the low-temperature test box 1. The bottom of the output end of the electric push rod 12 is fixedly connected to the top of the metal plate 13. The operation of the electric push rod 12 causes the metal plate 13 to move downward. An explosion-proof glass frame 16 is fixedly connected to the bottom of the metal plate 13. The explosion-proof glass frame 16 covers multiple power battery pack bodies 11. Two L-shaped tubes 14 are fixedly connected to the top of the metal plate 13.

[0026] Working principle: When in use, open the protective door and place multiple power battery pack bodies 11 on the top of the supporting seat 5, and separate them through multiple partitions 10 to prevent a chain reaction to other normal power battery pack bodies 11 when a short circuit causes a fire. At the same time, when placing the power battery pack body 11, slide the pin 8 out of the socket 7 to release the position fixation of the supporting seat 5, rotate the supporting seat 5 to place multiple power battery pack bodies 11 in sequence, and connect the charging line to the positive and negative poles on the power battery pack body 11 through the terminal. The battery pack body 11 is charged with an external power source through a charging line; the electric push rod 12 operates to move the metal plate 13 downward. When the metal plate 13 moves downward, the explosion-proof glass frame 16 moves downward to cover the multiple power battery pack bodies 11 to prevent the power battery pack bodies 11 from short-circuiting and catching fire and affecting the interior of the low-temperature test box 1. The compression of the compressor under high pressure, the isothermal heat exchange of the condenser, the adiabatic expansion of the throttle valve and the isothermal heat absorption of the evaporator in the low-temperature test box 1 create a low-temperature environment in the low-temperature test box 1, and the smoke sensor 15 monitors the smoke phenomenon caused by short-circuit fire.

[0027] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A low temperature charging monitoring device for a power battery pack, comprising a low temperature test chamber (1), characterized in that: A wiring seat (2) with a hollow structure is fixedly connected inside the low-temperature test box (1); a T-shaped wiring tube (3) is fixedly connected to the top of the wiring seat (2); a butt sleeve (4) is rotatably sleeved on the outer wall of the T-shaped wiring tube (3); a support seat (5) with a hollow structure is fixedly connected to the top of the butt sleeve (4); an assembly hole is provided at the bottom of the support seat (5); an electric slip ring (6) is fixedly connected to the inner wall of the assembly hole; a top column (9) is fixedly connected to the top of the support seat (5); four partitions (10) are fixedly connected to the outer wall of the top column (9); a plurality of power battery pack bodies (11) are placed on the top of the support seat (5); and a protective mechanism is provided inside the low-temperature test box (1).

2. A power battery pack low temperature charging monitoring device according to claim 1, characterized in that: The protection mechanism comprises a metal plate (13), an electric push rod (12) is fixedly connected inside the low-temperature test box (1), the bottom of the output end of the electric push rod (12) is fixedly connected to the top of the metal plate (13), the bottom of the metal plate (13) is fixedly connected to an explosion-proof glass frame (16), and the top of the metal plate (13) is fixedly connected to two L-shaped tubes (14) that are interconnected.

3. A power battery pack low temperature charging monitoring device according to claim 1, characterized in that: The outer wall of the T-shaped wiring tube (3) is provided with a plurality of insertion holes (7), the outer wall of the docking sleeve (4) is provided with a sliding hole, and the inner wall of the sliding hole is slidably connected with a plug (8).

4. A power battery pack low temperature charging monitoring device according to claim 1, characterized in that: The bottoms of the four partitions (10) are fixedly connected to the top of the supporting seat (5).

5. A power battery pack low temperature charging monitoring device according to claim 1, characterized in that: The outer wall of the supporting seat (5) is provided with a plurality of mounting holes, and the inner walls of the plurality of mounting holes are all fixedly connected with charging cables.

6. A power battery pack low temperature charging monitoring device according to claim 1, characterized in that: The outer wall of the low-temperature test box (1) is hinged with a protective door.

7. A power battery pack low temperature charging monitoring device according to claim 2, characterized in that: The outer wall of the metal plate (13) is provided with two through holes, and the inner walls of the two through holes are fixedly connected with smoke sensors (15).

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