Device for simulating thermal runaway of battery pack of whole vehicle

Abstract

The utility model relates to the field of battery testing, in particular to a device for simulating thermal runaway of a battery pack of a whole vehicle, the device is assembled with the battery pack, a plurality of pressing tools are arranged on the battery pack, pressing pieces are arranged on the pressing tools, the pressing pieces are parallel to the upper end face of the battery pack, and the battery pack is arranged on the battery pack. A gap part is arranged between the lower end face of the pressing piece and the upper end face of the battery pack, and when an operator carries out thermal runaway simulation through the thermal runaway simulation device, the device is provided with the pressing tool to replace a whole vehicle workshop contour surface, and the gap between the pressing tool and the battery pack is adjusted according to actual measurement, so that the thermal runaway simulation efficiency is improved. Therefore, the thermal runaway test of the whole battery pack is more accurate, and the situation that the test result is not matched with the actual condition of the whole vehicle is avoided.

Description

Technical Field

[0001] The utility model relates to the field of battery testing, in particular to a device for simulating thermal runaway of a battery pack of a whole vehicle. Background Art

[0002] At present, the new energy battery industry has increasingly higher safety requirements for battery packs. The test results of battery pack thermal runaway are an important test item for considering the thermal safety of battery packs. The test conditions and test conclusions directly affect the safe use of passengers and the entire vehicle. Thermal runaway tests that simulate and are closer to the use scenarios of the entire vehicle are particularly critical. When conducting thermal runaway tests on traditional battery packs, there is no clamping fixture on the battery pack cover, resulting in a large amount of gas generated after the battery cell valve is opened, which breaks the battery pack cover and allows a large amount of air to enter the battery pack, causing the battery pack to catch fire or explode. Or there is a clamping fixture but there is no gap between the clamping fixture and the battery pack, resulting in the thermal runaway test results not being consistent with the actual working conditions. Utility Model Content

[0003] The purpose of the utility model is to provide a device for simulating thermal runaway of a battery pack of a whole vehicle in order to solve the problems in the prior art that, in the thermal runaway test of the battery pack, a clamping fixture is not provided, resulting in damage to the battery pack, or there is no gap between the clamping fixture and the battery pack, resulting in the test result not matching the actual situation.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A device for simulating thermal runaway of a battery pack of a whole vehicle is provided. The device is assembled with a battery pack. A plurality of clamping fixtures are installed on the battery pack. A clamping piece is provided on the clamping fixture. The clamping piece is parallel to the upper end surface of the battery pack. A gap is provided between the lower end surface of the clamping piece and the upper end surface of the battery pack.

[0006] The utility model is a device for simulating thermal runaway of a battery pack of a whole vehicle, the device comprises a battery pack for detection, a plurality of clamping fixtures are arranged on the battery pack, and the clamping fixture comprises a clamping piece parallel to the battery pack, and a gap portion is left between the lower end surface of the clamping piece and the upper end surface of the battery pack, the contour surface of the whole vehicle workshop is simulated by the clamping fixture, and the size of the gap portion is set according to the assembly gap value between the contour surface of the upper cover of the whole vehicle battery pack and the contour surface of the whole vehicle frame to be simulated, so that when the thermal runaway simulation is performed, since the clamping fixture is provided to replace the contour surface of the whole vehicle workshop, and the gap between the clamping fixture and the battery pack is adjusted according to the actual measurement, the test of the thermal runaway of the whole battery pack is made more accurate, and the situation that the test result does not match the actual situation of the whole vehicle is avoided.

[0007] As a preferred solution of the present invention, the pressing member includes a metal plate member.

[0008] As a preferred solution of the present invention, the battery pack includes a battery pack cover, and the gap portion is arranged between the battery pack cover and the pressing member, so as to accurately measure the thermal failure of the battery pack.

[0009] As a preferred solution of the utility model, the battery pack upper cover is connected to the battery pack lower box, and the battery pack lower box is provided with a first connecting hole, and the first connecting hole is used to connect the clamping tool to connect the clamping tool and the battery pack as a whole, which is convenient for subsequent measurement and testing.

[0010] As a preferred solution of the utility model, the clamping tool includes a mounting frame, the clamping tool includes a mounting frame, the mounting frame includes vertical rods symmetrically arranged on both sides of the battery pack, a cross bar is provided between the vertical rods on both sides opposite to each other, the lower end surface of the cross bar is connected to the upper end surface of the clamping piece, in this way, a reserved gap is created between the battery pack and the clamping piece.

[0011] As a preferred solution of the utility model, according to the structural shape of the battery pack, a temporary cushion material can be arranged between the bottom surface of the cross bar and the battery pack cover to meet the different heights of the battery pack cover at the lower end of the same cross bar.

[0012] As a preferred solution of the utility model, the cross bar is provided with a mounting groove at the joint with the vertical bar, and a second connecting hole is also provided in the mounting groove. The end of the vertical bar is embedded in the mounting groove. By setting the vertical bar in the mounting groove and splicing it with the cross bar, on the one hand, the unstable connection between the vertical bar and the cross bar after the connection is avoided, and on the other hand, it is also convenient for installation and speeds up the installation time.

[0013] As a preferred solution of the present invention, the cross bar and the vertical bar are both length-adjustable structural members. This arrangement enables the mounting frame to use battery packs of various sizes, thereby improving efficiency while reducing costs.

[0014] As a preferred solution of the utility model, a third connecting hole is provided on the vertical rod, and the size of the third connecting hole is the same as that of the second connecting hole. The second connecting hole and the third connecting hole are both the same in position and size as the first connecting hole. This arrangement makes the connection tighter.

[0015] As a preferred solution of the present invention, the first connection hole, the second connection hole and the third connection hole are all bolt holes, which improves the stability of subsequent connections.

[0016] As a preferred solution of the present invention, the mounting frame and the battery pack are connected by sequentially passing locking bolts through the first connecting hole, the second connecting hole and the third connecting hole, thereby enhancing the stability of the connection.

[0017] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0018] 1. The utility model is a device for simulating thermal runaway of a battery pack of a whole vehicle, the device includes a battery pack for detection, a plurality of clamping fixtures are arranged on the battery pack, and the clamping fixture includes a clamping piece parallel to the battery pack, and a gap portion is left between the lower end surface of the clamping piece and the upper end surface of the battery pack, the clamping fixture is used to simulate the contour surface of the whole vehicle workshop, and the size of the gap portion is set according to the assembly gap value between the contour surface of the upper cover of the whole vehicle battery pack and the contour surface of the whole vehicle frame to be simulated, so that when performing thermal runaway simulation, since the clamping fixture is provided to replace the contour surface of the whole vehicle workshop, and the gap between the clamping fixture and the battery pack is adjusted according to actual measurement, the test of thermal runaway of the entire battery pack is more accurate, avoiding the situation where the test result does not match the actual situation of the whole vehicle.

[0019] 2. The utility model is a device that simulates thermal runaway of a battery pack of a whole vehicle. The mounting frame connecting the clamping piece and the battery pack is set in a form with adjustable vertical and horizontal lengths, so that operators can use the same mounting frame to perform thermal runaway detection on battery packs of different whole vehicles without having to replace the mounting frame according to different battery pack sizes, thereby reducing costs and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure after the pressing tool of the utility model is connected to the battery pack;

[0021] Figure 2 It is a side view structural schematic diagram of the clamping tool and the battery pack of the utility model after being connected;

[0022] Figure 3 The utility model Figure 2 A local enlarged view of point A;

[0023] Figure 4 It is a schematic diagram of the top view of the lower box of the battery pack of the utility model;

[0024] Figure 5 It is a structural schematic diagram of the mounting frame of the utility model;

[0025] Figure 6 It is a schematic diagram of the vertical rod structure of the utility model;

[0026] Figure 7 It is a schematic diagram of the crossbar structure of the utility model.

[0027] Icons: 1-clamping tool; 11-clamping piece; 12-mounting frame; 121-cross bar; 1211-mounting slot; 1212-second connecting hole; 122-vertical bar; 1221-third connecting hole; 2-battery pack; 21-battery pack upper cover; 22-battery pack lower box; 221-first connecting hole; 3-locking bolt; 4-gap portion. DETAILED DESCRIPTION

[0028] The utility model is described in detail below in conjunction with the accompanying drawings.

[0029] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0030] Example 1

[0031] like Figure 1-3 A device for simulating thermal runaway of a battery pack of a whole vehicle is shown, which includes a battery pack 2 to be tested, and a plurality of clamping fixtures 1 are provided on the battery pack 2. The clamping fixtures 1 are used to simulate the frame contour surface of the whole vehicle to be tested. The clamping fixture 1 includes a clamping member 11, and the clamping member 11 is located in the upper area of ​​the battery pack 2 and is parallel to the upper end surface of the battery pack 2. When the clamping fixture 1 and the battery pack 2 are installed, a gap 4 is reserved between the lower end surface of the clamping member 11 and the upper end surface of the battery pack 2.

[0032] The size of the gap 4 is the actual assembly gap value between the contour surface of the battery pack cover and the contour surface of the vehicle frame, ensuring the accuracy of the vehicle data.

[0033] As mentioned above, the battery pack 2 is composed of a battery pack upper cover 21 and a battery pack lower box 22, and the battery pack lower box 22 is provided with a first connecting hole 221, through which the battery pack 2 is connected to the pressing tool 1;

[0034] The gap 4 reserved between the pressing member 11 and the battery pack 2 in the pressing tool 1 is actually the distance between the pressing member 11 and the battery pack upper cover 21. Figure 2-4 shown.

[0035] The above-mentioned pressing tool 1 includes a mounting frame 12 connected to the lower box body 22 of the battery pack, and the mounting frame 12 is used to install the pressing member 11, so that a gap portion 4 can be retained between the pressing member 11 and the upper cover 21 of the battery pack, so as to avoid the pressing member 11 and the upper cover 21 of the battery pack being fitted together, resulting in the test result not matching the actual result;

[0036] Furthermore, the mounting frame 12 is provided with a pair of vertical rods 122 and a cross rod 121 connected to the two vertical rods 122, and the vertical rod 122 and the cross rod 121 are telescopic rods with adjustable lengths. In this way, when it is necessary to test various types of vehicles, the same mounting frame 2 can be used for testing, thereby avoiding the situation of having one frame for one vehicle, reducing costs and improving efficiency. Figure 5 shown.

[0037] As mentioned above, two installation grooves 1211 are provided at the lower end of the horizontal bar 121, so that when the operator installs the mounting frame 12, he can directly insert the vertical bar 122 into the installation groove 1211 to install it, saving time;

[0038] Furthermore, a second connection hole 1212 is provided in the installation groove 1211, and a third connection hole 1221 is provided on the vertical rod 122 spliced ​​with the installation groove 1211, and the second connection hole 1212 and the third connection hole 1221 are both at the same position and size as the first connection hole 221. After the setting is completed, the operator locks the entire mounting frame 12 and the battery pack 2 by sequentially passing the locking bolt 3 through the second connection hole 1212, the third connection hole 1221 and the first connection hole 221, as shown in FIG. Figure 4-7 shown.

[0039] Example 2

[0040] This embodiment 2 is to illustrate the use of a device for simulating thermal runaway of a vehicle battery pack in embodiment 1;

[0041] The operator first actually measures the assembly gap value between the contour surface of the upper cover of the battery pack of the whole vehicle to be tested and the contour surface of the frame of the whole vehicle, and uses this gap value as the relative distance between the subsequent clamping piece 11 and the upper cover 21 of the battery pack, adjusts the length of the vertical rod 122 and the cross bar 121 in the entire mounting frame 12, and installs it on the lower box 22 of the battery pack. Then, according to the measured gap value, the distance between the clamping piece 11 connected under the cross bar 121 and the upper cover 21 of the battery pack is adjusted to simulate the test results of thermal runaway of the battery pack in the whole vehicle environment under real conditions. The test basis is that when the battery pack has thermal runaway, after the battery cell opens the valve to produce gas, the maximum bulging amount of the upper cover of the battery pack is less than or equal to the gap between the clamping piece 11 and the upper cover 21 of the battery pack, which meets the requirements.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for simulating thermal runaway of a battery pack of a whole vehicle, the device being assembled with a battery pack (2), characterized in that: A plurality of clamping fixtures (1) are installed on the battery pack (2), and a clamping piece (11) is provided on the clamping fixture (1). The clamping piece (11) is parallel to the upper end surface of the battery pack (2), and a gap portion (4) is provided between the lower end surface of the clamping piece (11) and the upper end surface of the battery pack (2).

2. The device for simulating thermal runaway of a vehicle battery pack according to claim 1, characterized in that: The battery pack (2) comprises a battery pack upper cover (21), and the gap portion (4) is arranged between the battery pack upper cover (21) and the pressing member (11).

3. The device for simulating thermal runaway of a vehicle battery pack according to claim 2, characterized in that: The battery pack upper cover (21) is connected to the battery pack lower box (22), and the battery pack lower box (22) is provided with a first connection hole (221), and the first connection hole (221) is used to connect the pressing tool (1).

4. The device for simulating thermal runaway of a vehicle battery pack according to claim 3, characterized in that: The clamping tool (1) comprises a mounting frame (12), the mounting frame (12) comprising vertical bars (122) symmetrically arranged on both sides of the battery pack (2), a cross bar (121) being arranged between the vertical bars (122) on both sides opposite to each other, and the lower end surface of the cross bar (121) being connected to the upper end surface of the clamping member (11).

5. The device for simulating thermal runaway of a vehicle battery pack according to claim 4, characterized in that: According to the structural shape of the battery pack (2), a temporary cushion material is arranged between the bottom surface of the cross bar (121) and the battery pack upper cover (21) to meet the different heights of the battery pack upper cover (21) at the lower end of the same cross bar (121).

6. The device for simulating thermal runaway of a vehicle battery pack according to claim 4, characterized in that: The cross bar (121) is provided with a mounting groove (1211) at the joint with the vertical bar (122), a second connecting hole (1212) is also provided in the mounting groove (1211), and the end of the vertical bar (122) is embedded in the mounting groove (1211).

7. The device for simulating thermal runaway of a vehicle battery pack according to claim 5, characterized in that: The cross bar (121) and the vertical bar (122) are both length-adjustable structural members.

8. The device for simulating thermal runaway of a vehicle battery pack according to claim 6, characterized in that: The vertical rod (122) is a hollow structure, and a third connecting hole (1221) is vertically provided on the vertical rod (122), the size of the third connecting hole (1221) is the same as the size of the second connecting hole (1212), and the second connecting hole (1212) and the third connecting hole (1221) are both located and sized identically to the first connecting hole (221).

9. The device for simulating thermal runaway of a vehicle battery pack according to claim 8, characterized in that: The mounting frame (12) and the battery pack (2) are connected by sequentially passing a locking bolt (3) through the first connection hole (221), the second connection hole (1212), and the third connection hole (1221).

10. A device for simulating thermal runaway of a vehicle battery pack according to any one of claims 1 to 9, characterized in that: The pressing member (11) comprises a metal sheet member.

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