Forced short circuit experiment device for power battery pack

Abstract

The utility model discloses a power battery pack forced short circuit experiment device which comprises a box body and an experiment host, the experiment host is located at the top of the box body, one side of the box body is open, the open side of the box body is rotatably connected with a side door through a hinge, and the side wall of the experiment host is fixedly connected with a test wire. A supporting assembly is installed on the inner bottom wall of the box body, electric telescopic rods are fixedly connected to the two sides of the inner bottom wall of the box body, and the telescopic ends of the tops of the two electric telescopic rods are jointly and fixedly connected with a protection assembly. According to the utility model, the box body, the experiment host, the test line, the supporting assembly, the electric telescopic rod and the protection assembly are arranged, the battery pack to be tested is placed on the surface of the supporting assembly for short circuit, and the protection assembly is driven by the electric telescopic rod to descend and cover the surface of the battery pack; and the protection assembly can prevent explosion fragments from splashing, so that the inner wall of the box body is protected.

Description

Technical Field

[0001] The utility model relates to the technical field of power battery pack experiments, in particular to a forced short-circuit experiment device for a power battery pack. Background Art

[0002] The battery external short circuit test device is a device used to test the short circuit performance of the battery. The principle is to use a circuit to connect the positive and negative poles of the battery, and then short-circuit the battery through the short-circuit device. During the short-circuit process, the short-circuit performance and safety of the battery are judged by measuring the internal resistance, voltage, current and other parameters of the battery. This method can effectively measure the performance of the battery under external short circuit conditions and provide a reference for the design and production of the battery.

[0003] The existing battery short-circuit test device includes a box body and a short-circuit test host on the top. The test host is connected to the positive and negative poles of the battery pack through a test line, and then the battery pack is short-circuited through the test host. During this process, the battery pack may smoke, and the smoke exhaust structure of the existing short-circuit test device is located above the box body. The smoke will flow upward, thereby blocking the battery pack and hindering the observation of the status of the battery pack. Secondly, the battery may also explode, and the fragments of the explosion will impact the inner wall of the test box, which may easily cause damage to the side wall of the box over time. Therefore, the utility model proposes a forced short-circuit test device for a power battery pack. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a forced short-circuit test device for a power battery pack.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a forced short-circuit test device for a power battery pack, comprising a box body and an experimental host, the experimental host being located at the top of the box body, one side of the box body being an open design, and the open side of the box body being rotatably connected to a side door by a hinge, the side wall of the experimental host being fixedly connected to a test line, a support assembly being installed on the inner bottom wall of the box body, electric telescopic rods being fixedly connected on both sides of the inner bottom wall of the box body, and a protective assembly being fixedly connected to the top telescopic ends of the two telescopic electric telescopic rods, the bottom of the support assembly being fixedly connected to an exhaust scoop, and the bottom end of the exhaust scoop being fixedly connected to a smoke exhaust pipe, and a negative pressure fan connected to the smoke exhaust pipe being installed on the outer side wall of the box body.

[0006] Furthermore, the support assembly includes a plurality of support rods fixed to the bottom wall of the box body, the top ends of the plurality of support rods are commonly fixedly connected to a top plate, the middle portion of the top plate is hollowed out, and the middle portion of the top plate is fixedly connected to a support net.

[0007] Furthermore, the protective assembly includes a horizontal plate, the four corners of the lower surface of the horizontal plate are fixedly connected to vertical poles, the bottom ends of multiple vertical poles are commonly fixedly connected to a frame plate, a metal protective net is fixedly connected between two adjacent vertical poles, and side plates are fixedly connected to both ends of the horizontal plate, and the side plates are fixedly connected to the telescopic ends of the corresponding electric telescopic rods by bolts.

[0008] Furthermore, the test line passes through the side wall of the box and the top plate and extends to the upper surface of the top plate.

[0009] Furthermore, the negative pressure fan is fixedly connected with an air suction pipe and an exhaust pipe, and a hose is commonly connected between the air suction pipe and the smoke exhaust pipe.

[0010] Furthermore, one end of the exhaust pipe away from the negative pressure fan is fixedly connected to a flue gas purification device.

[0011] Furthermore, a visual window is fixedly connected to the middle of the side door, and an air inlet is opened at the top of the side door.

[0012] Beneficial effects of the utility model:

[0013] 1. When the utility model is in use, the power battery pack forced short circuit test device is provided with a box body, a test host, a test line, a support assembly, an electric telescopic rod and a protective assembly. The battery pack to be tested is placed on the surface of the support assembly to conduct a short circuit test. The protective assembly is driven down by the electric telescopic rod and covers the surface of the battery pack. If the battery pack explodes, the protective assembly can prevent the explosion fragments from splashing, thereby protecting the inner wall of the box body.

[0014] 2. When the utility model is in use, the power battery pack forced short circuit test device is provided with an exhaust scoop, a negative pressure fan and a smoke purification device. The exhaust scoop is located on the lower surface of the top plate of the support assembly. The smoke generated by the short circuit of the battery pack can be extracted from below by the negative pressure fan and the exhaust scoop to prevent the smoke from flowing upward and blocking the battery pack, so as to better observe the state of the battery pack when it is short-circuited. 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 : The overall stereogram of the utility model;

[0017] Figure 2 : The overall front view of the utility model;

[0018] Figure 3 : A three-dimensional diagram of the protective component of the utility model.

[0019] The reference numerals are as follows:

[0020] 1. Box; 2. Experimental host; 3. Test line; 4. Support assembly; 41. Support rod; 42. Top plate; 43. Support net; 5. Electric telescopic rod; 6. Protection assembly; 61. Horizontal plate; 62. Frame plate; 63. Vertical pole; 64. Metal protection net; 7. Side plate; 8. Exhaust scoop; 9. Negative pressure fan; 91. Exhaust pipe; 92. Exhaust pipe; 10. Smoke exhaust pipe; 11. Hose; 12. Smoke purification device; 13. Side door; 14. Visual window; 15. Air inlet. DETAILED DESCRIPTION

[0021] 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.

[0022] like Figure 1-Figure 3 As shown, it relates to a forced short-circuit experimental device for a power battery pack, including a box body 1 and an experimental host 2, the experimental host 2 is located at the top of the box body 1, one side of the box body 1 is open, and the open side of the box body 1 is rotatably connected to a side door 13 through a hinge, the side wall of the experimental host 2 is fixedly connected to a test line 3, a support assembly 4 is installed on the inner bottom wall of the box body 1, electric telescopic rods 5 are fixedly connected on both sides of the inner bottom wall of the box body 1, and the top telescopic ends of the two telescopic ends of the electric telescopic rods 5 are commonly fixedly connected to a protective assembly 6, an exhaust scoop 8 is fixedly connected to the bottom of the support assembly 4, and a smoke exhaust pipe 10 is fixedly connected to the bottom end of the exhaust scoop 8, and a negative pressure fan 9 connected to the smoke exhaust pipe 10 is installed on the outer side wall of the box body 1.

[0023] like Figure 1-Figure 2 As shown, the support assembly 4 includes a plurality of support rods 41 fixed to the inner bottom wall of the box body 1, the top ends of the plurality of support rods 41 are commonly fixedly connected to a top plate 42, the middle portion of the top plate 42 is hollowed out, and the middle portion of the top plate 42 is fixedly connected to a support net 43.

[0024] The top plate 42 is suspended by the support rod 41, and the bottom is convenient for installing the exhaust scoop 8. The support net 43 is made of metal net, which can support the battery pack. When the battery pack short-circuits and smokes, the smoke can pass through the support net 43 and be sucked away by the exhaust scoop 8, so that the smoke can flow downward to avoid the smoke blocking the battery pack.

[0025] like Figure 1-Figure 3As shown, the protection component 6 includes a horizontal plate 61, and vertical poles 63 are fixedly connected at the four corners of the lower surface of the horizontal plate 61. The bottom ends of multiple vertical poles 63 are commonly fixedly connected to a frame plate 62, and a metal protection net 64 is fixedly connected between two adjacent vertical poles 63. Both ends of the horizontal plate 61 are fixedly connected to side plates 7, and the side plates 7 are fixedly connected to the telescopic ends of the corresponding electric telescopic rods 5 by bolts.

[0026] When a test battery pack is placed on the surface of the support net 43, the electric telescopic rod 5 can be driven to drive the protective assembly 6 to descend and cover the surface of the battery pack to prevent the fragments generated by the explosion of the battery pack from flying around.

[0027] like Figure 1-Figure 2 As shown, the test line 3 passes through the side wall of the box body 1 and the top plate 42 and extends to the upper surface of the top plate 42. It is convenient to connect the test line 3 with the battery pack.

[0028] like Figure 2 As shown, the negative pressure fan 9 is fixedly connected to an exhaust pipe 91 and an exhaust pipe 92 , and a hose 11 is commonly connected between the exhaust pipe 91 and the smoke exhaust pipe 10 .

[0029] When the negative pressure fan 9 is started, the smoke generated by the battery pack can be sucked away from the exhaust hopper 8 and then discharged through the smoke exhaust pipe 10.

[0030] like Figure 2 As shown, one end of the exhaust pipe 92 away from the negative pressure fan 9 is fixedly connected to a fume purification device 12. After the fume discharged from the exhaust pipe 10 passes through the fume purification device 12, the fume can be purified and then discharged to avoid affecting the laboratory environment.

[0031] like Figure 1 As shown, a visual window 14 is fixedly connected to the middle of the side door 13 , and an air inlet 15 is opened at the top of the side door 13 .

[0032] The state of the battery pack short-circuited inside the box body 1 can be observed through the viewing window 14, and after the negative pressure fan 9 is started, external air can enter the box body 1 from the air inlet 15 to achieve air flow.

[0033] Working principle: first place the battery pack to be tested on the surface of the support net 43, then connect the test line 3 to the battery pack, then start the electric telescopic rod 5 to shorten and drive the protective component 6 to cover the surface of the battery pack. After the above preparations are completed, close the side door 13 and short-circuit the battery pack through the experimental host 2, and start the negative pressure fan 9 at the same time. At this time, the state of the battery pack short circuit can be observed through the visual window 14. The flue gas generated by the battery pack short circuit can be extracted through the negative pressure fan 9. The flue gas flows downward along the exhaust hopper 8, and then enters the flue gas purification device 12 along the exhaust pipe 10 and the exhaust pipe 92. The flue gas is finally discharged after purification. If the battery pack explodes, the protective component 6 can prevent the debris generated by the explosion from splashing. If the protective component 6 is damaged, the side panel 7 and the telescopic end of the electric telescopic rod 5 can be disassembled, so that a new protective component 6 can be replaced.

[0034] 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 power battery pack forced short circuit test device, comprising a box (1) and a test host (2), characterized in that: The experimental host (2) is located at the top of the box (1), one side of the box (1) is open, and the open side of the box (1) is rotatably connected to a side door (13) through a hinge, the side wall of the experimental host (2) is fixedly connected to a test line (3), the inner bottom wall of the box (1) is installed with a support assembly (4), both sides of the inner bottom wall of the box (1) are fixedly connected to electric telescopic rods (5), the top telescopic ends of the two telescopic electric telescopic rods (5) are commonly fixedly connected to a protective assembly (6), the bottom of the support assembly (4) is fixedly connected to an exhaust scoop (8), and the bottom end of the exhaust scoop (8) is fixedly connected to a smoke exhaust pipe (10), and the outer side wall of the box (1) is installed with a negative pressure fan (9) connected to the smoke exhaust pipe (10).

2. A power battery pack forced short circuit test device according to claim 1, characterized in that: The support assembly (4) comprises a plurality of support rods (41) fixed to the inner bottom wall of the box body (1); the top ends of the plurality of support rods (41) are commonly fixedly connected to a top plate (42); the middle portion of the top plate (42) is hollow-out, and the middle portion of the top plate (42) is fixedly connected to a support net (43).

3. A power battery pack forced short circuit test device according to claim 1, characterized in that: The protection component (6) comprises a horizontal plate (61), the four corners of the lower surface of the horizontal plate (61) are fixedly connected to vertical poles (63), the bottom ends of a plurality of the vertical poles (63) are commonly fixedly connected to a frame plate (62), a metal protection net (64) is fixedly connected between two adjacent vertical poles (63), and both ends of the horizontal plate (61) are fixedly connected to side plates (7), and the side plates (7) are fixedly connected to the telescopic ends of the corresponding electric telescopic rods (5) by bolts.

4. A power battery pack forced short circuit test device according to claim 2, characterized in that: The test line (3) passes through the side wall of the box body (1) and the top plate (42) and extends to the upper surface of the top plate (42).

5. A power battery pack forced short circuit test device according to claim 1, characterized in that: The negative pressure fan (9) is fixedly connected to an air extraction pipe (91) and an exhaust pipe (92), and a hose (11) is commonly connected between the air extraction pipe (91) and the smoke exhaust pipe (10).

6. A power battery pack forced short circuit test device according to claim 5, characterized in that: One end of the exhaust pipe (92) away from the negative pressure fan (9) is fixedly connected to a fume purification device (12).

7. A power battery pack forced short circuit test device according to claim 1, characterized in that: A visual window (14) is fixedly connected to the middle of the side door (13), and an air inlet (15) is provided at the top of the side door (13).

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