KR20080070144A - Drop test device of battery - Google Patents
Drop test device of battery Download PDFInfo
- Publication number
- KR20080070144A KR20080070144A KR1020070007790A KR20070007790A KR20080070144A KR 20080070144 A KR20080070144 A KR 20080070144A KR 1020070007790 A KR1020070007790 A KR 1020070007790A KR 20070007790 A KR20070007790 A KR 20070007790A KR 20080070144 A KR20080070144 A KR 20080070144A
- Authority
- KR
- South Korea
- Prior art keywords
- drop
- battery cell
- battery
- test
- detachable
- Prior art date
Links
- 230000001939 inductive effects Effects 0.000 claims description 14
- 239000010410 layers Substances 0.000 claims description 4
- 239000000463 materials Substances 0.000 claims description 4
- 230000001276 controlling effects Effects 0.000 claims description 3
- 229910052751 metals Inorganic materials 0.000 claims description 2
- 239000002184 metals Substances 0.000 claims description 2
- 239000011347 resins Substances 0.000 claims description 2
- 229920005989 resins Polymers 0.000 claims description 2
- 238000003780 insertion Methods 0.000 claims 1
- 238000010586 diagrams Methods 0.000 description 5
- 238000007789 sealing Methods 0.000 description 4
- 230000000875 corresponding Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
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- OJIJEKBXJYRIBZ-UHFFFAOYSA-N [Cd].[Ni] Chemical compound 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Images
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/30—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/08—Shock-testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0076—Hardness, compressibility or resistance to crushing
- G01N2203/0087—Resistance to crushing
Abstract
Description
1 is a schematic diagram of a battery drop test apparatus according to an embodiment of the present invention;
2 is a schematic view showing the side of the battery drop test apparatus of FIG.
3 is an enlarged schematic view illustrating a state in which a battery cell is mounted by a detachable member in the drop part of FIG. 1;
4 is an enlarged schematic view showing a state in which the battery cell is detached from the falling portion in FIG.
FIG. 5 is a front schematic view showing the guide member and the shaft in the state where the dropping portion is not mounted in FIG. 1; FIG.
6 is a schematic view showing a connection state of the lower support and the guide member in FIG.
The present invention relates to an apparatus for performing a test on a battery cell by dropping the battery cell at a predetermined height, more specifically, by mounting the battery cell in a predetermined drop shape by changing the interval between each other, instantaneous It consists of a falling portion consisting of a pair of detachable members detached by a free fall, the shaft is mounted, the detachable member is a lower support for holding at least a portion of the lower end of the battery, and at least a portion of the side of the battery It consists of a side support, and a drop test device characterized in that the detachment of the instant after the battery cell is fixedly mounted between the two detachable members.
As technology development and demand for mobile devices increase, the demand for secondary batteries as a source of energy is rapidly increasing.
The secondary battery may be used in the form of a single battery cell, or in the form of a battery module in which a plurality of unit cells are electrically connected, depending on the type of external device in which the secondary battery is used. For example, a small device such as a mobile phone can operate for a predetermined time with the output and capacity of one battery cell, while a notebook computer, a portable DVD, a personal computer, an electric vehicle, and a hybrid electric Medium or large devices such as automobiles require the use of a battery module including a plurality of battery cells due to problems of output and capacity.
The battery module is manufactured by connecting a protection circuit or the like to a core pack in which a plurality of unit cells are arranged in series and / or in parallel. In the case of using a square or pouch type battery as a unit cell, the wide surfaces thereof may be stacked to face each other, and then the electrode terminals may be easily connected by connecting members such as bus bars. Therefore, in the case of manufacturing a three-dimensional battery module having a hexahedral structure, a square or pouch type battery is advantageous as a unit cell.
Conventionally, nickel-cadmium batteries or hydrogen ion batteries are mainly used as secondary batteries, but recently, lithium ion batteries and lithium polymer batteries having high energy density have been used. Such secondary batteries are increasing in demand due to the advantages described above.
On the other hand, the secondary battery has a risk of ignition or explosion due to various factors such as a short circuit, overcharge due to falling, external shocks, etc., ensuring safety is one of the main development problems of the secondary battery. Therefore, in order to confirm the safety of the newly developed secondary battery, in particular, mechanical or physical safety, a method of checking whether the electrode is shorted by performing a drop test after manufacturing the battery cell is performed. For example, the drop test is a test for checking whether a short circuit occurs at an electrode terminal part when the battery is dropped toward the electrode terminal and colliding with the ground, and whether the battery cell has a damaged part. This is done by setting a condition in which the part falls from a predetermined height and collides with the ground.
In general, the drop test is performed by the tester dropping the battery at a specific height or free-falling after mounting in a separate device. However, in the former case, it is difficult to accurately drop the battery at a desired position or to set a specific part of the battery to collide with the ground when falling, so the accuracy of the drop test is poor. The conventional drop test apparatus used in the latter case has a problem in that it is difficult to be applied to a thin-walled battery such as a pouch-type battery, that is, a sample that cannot be inverted by itself on the x, y, and z axes.
More specifically, the conventional drop test apparatus has a structure in which a battery is mounted on an arm installed at a specific height, and the arm is temporarily removed to freely drop, so that a pouch-type battery or the like can be established in a desired drop direction. There is a problem that the drop test apparatus using the vacuum adsorption pad exerts a force on the side surface of the pouch battery, causing damage to the battery case, particularly the sealing part.
In this regard, Japanese Patent Laid-Open No.6508103, Japanese Patent Application Laid-Open No. 1999-153532, Japanese Patent Application Laid-Open No. 2002-174574, Japanese Patent Application Laid-Open No. 2000-065678, and the like, support portions for supporting side surfaces of a test subject. A drop test apparatus is provided. However, the drop test apparatus disclosed in these patents or applications has a complicated structure and a force is applied to the side of the battery, which damages the sealing part of the battery, and thus does not fundamentally solve the above problems.
Accordingly, an object of the present invention is to solve the problems of the prior art and the technical problem that has been requested from the past.
That is, an object of the present invention is to drop the battery that can be easily operated and increase the precision of the test by fixing the drop shape of the battery at a predetermined height so as to drop the battery in a desired direction, and then immediately detach and free fall. To provide a test device.
The battery drop test apparatus according to the present invention is a device for performing a test on the battery cell by dropping the battery cell at a predetermined height, by fixedly mounting the battery cell in a predetermined drop shape by changing the interval between each other, A drop portion made up of a pair of detachable members which are detached and free-fall instantaneously; And a shaft on which the drop portion is mounted at a predetermined height from the ground, wherein the detachable member includes a lower support for supporting at least a lower end of the battery, and a side support for supporting at least a part of the side of the battery. And, it is characterized in that the battery cell is temporarily detached after the fixed mounting between the two removable members.
Therefore, the drop test apparatus according to the present invention has a simpler structure than the conventional drop test apparatus, and can drop the battery cell in a desired test direction at a predetermined test height to collide with the ground, thereby testing the safety of the battery cell. The battery drop test for performing can be performed more precisely.
As described above, the dropping part of the drop test apparatus includes a pair of detachable members including a lower supporter for supporting a part or the entire lower end of the battery cell, and a side supporter for supporting a part or the whole of the side surface of the battery cell. .
The battery cell is mounted between a pair of detachable members disposed in a structure facing each other, and the battery cell is mounted in a predetermined drop shape, and then the support parts are momentarily moved to the left and right to form a desired drop shape. Drop the cell. By supporting the lower part or the entire lower end of the battery cell, the lower support can minimize the damage to the sealing portion formed on the side of the cell compared to the conventional drop test device for pressing the side of the battery cell. In addition, the side support supports the side surface of the battery cell mounted on the lower support, it is possible to position the battery cell on the drop in a drop shape.
The shaft is preferably made of a structure that can be mounted in a state that the falling portion can be moved up and down, it is possible to vertically move the falling portion to the desired test height. That is, the dropping portion may be mounted in a structure in which the height can be variably adjusted with respect to the shaft. Preferably, the indented or protruding rail is formed in the shaft in the longitudinal direction, and the dropping portion at a specific height A member for fixing the position (position fixing member) may be provided in the shaft or the drop portion.
In one preferred embodiment, the side of the shaft side fall portion is further provided with an induction member for the lower support, the lower support of the detachable member can move in the horizontal direction in accordance with the operating conditions of the device, the drop portion is the induction It may be a structure mounted to the shaft at a predetermined height from the ground by the member. Therefore, the detachable member of the drop portion may move freely by mounting and detaching the battery cell in a drop shape while its lower support moves left and right along the guide member.
In order to enable the horizontal movement in the horizontal direction, a groove ('horizontal groove') is preferably formed in the transverse direction in the transverse direction, and inserted into the horizontal groove of the induction member at one end of the dropping portion. The fastening protrusions are formed, and the fastening protrusions are coupled to the horizontal grooves in a state in which the fastening protrusions can move left and right, thereby stably inducing horizontal movement of the detachable member.
As described above, in the structure in which the position fixing member is additionally installed in the shaft or the dropping portion, the position fixing member can fix the lower guide guide member to the shaft.
The side support of the detachable member is not particularly limited as long as it is a structure capable of stably supporting the side of the battery cell, and preferably, the upper end thereof is inclined in the direction of the battery cell so as to support the side of the battery cell. Can be.
The side support may be made of a resilient structure or elastic material to enable elastic mounting without a separate member, the elastic material is not particularly limited in kind but is preferably used rubber.
In this case, the elastic material is more preferable because it does not damage the sealing portion formed on the side of the battery cell.
On the other hand, in order to mount the battery cell in a predetermined drop shape and instantaneously drop, the distance between the detachable members must be narrowed or widened depending on the operating conditions. Therefore, the rear end of the detachable member may be connected to a power member for providing power to control the mutual spacing between the detachable members.
In this case, the power member is not particularly limited as long as the power member can be moved to the left and right with respect to the shaft. Preferably, the power member may be an electric motor.
In the above structure, one side or both sides of the detachable member is mounted with a sensor for detecting the gap between them, and may further comprise a control unit for controlling the operation of the sensor and the electric motor.
For example, the sensor is mounted on a lower support or a side support, which is a detachable member, detects the distance between the detachable members and transmits the detected distances to the control unit, and the control unit operates the motor according to a predetermined test criterion. The mutual spacing between the members can be narrowed or widened.
As the battery cell to be applied to the drop test apparatus of the present invention, a plate-shaped battery having a large width to thickness is preferable, and in particular, the electrode assembly is formed in a pouch type case of a laminate sheet including a resin layer and a metal layer. Battery cells are preferred. The battery cell in which the electrode assembly is built in the pouch type case may be vulnerable to dropping, external impact, etc. due to the low mechanical rigidity of the battery case. It is not easy to perform the desired test with the drop test apparatus. On the other hand, the drop test apparatus according to the present invention is easy to perform the test on such a pouch-type battery cell.
The present invention also provides a method for performing a test for the drop of the battery cell to test the mechanical safety of the battery cell using the drop test device as described above.
The method of performing a battery cell drop test using the drop test apparatus may be various. Preferably, the battery cell is fixedly mounted in a drop shape between the detachable members in the drop part of the drop test apparatus and then immediately. The battery cell and the detachable member can be detached to induce free fall.
More specifically, after the dropping part is moved upward from the shaft to a desired position, the battery cell is mounted on the detachable member of the dropping part in a desired drop shape, and then each of the pair of detachable members is instantaneously moved to the left and right. Only the cell can fall vertically in the direction of the ground and hit the ground.
In this case, the drop shape is positioned on the dropping portion so that a predetermined portion of the battery cell to be tested hits the ground first. Preferably, the drop shape is likely to cause a short circuit from the pressure applied from the outside in the battery cell. The electrode terminal of the battery cell, which is a part that needs more safety, may be shaped toward the ground.
Hereinafter, although described with reference to the drawings according to an embodiment of the present invention, this is for easier understanding of the present invention, the scope of the present invention is not limited thereto.
1 is a schematic diagram of a battery drop test apparatus according to an embodiment of the present invention, Figure 2 is a schematic diagram showing the side of the drop test apparatus of FIG.
Referring to these drawings, the drop test device 100 of the battery is grounded on the falling portion 200, the falling portion 200 consisting of a pair of detachable members 201, 202 on which the battery cell 400 is mounted ( Of the electric motor 240 connected to the rear of the shaft 300 mounted at a predetermined height H from the 320 and a sensor (not shown) mounted on one side of the detachable member and the detachable members 201 and 202. Consists of a control unit 500 for controlling the operation.
The shaft 300 has an indented or protruding rail 330 formed in the longitudinal direction so that the falling portion 200 can vertically move vertically in accordance with the drop test height H of the desired battery cell 200. It is.
The dropping part 200 composed of a pair of detachable members 201 and 202 has a detachable member 201 and 202 in a horizontal direction on a side of the shaft 300 in accordance with operating conditions of the test apparatus 100. Induction member 250 for the lower support that can move left and right is further installed. As a result, the drop 200 is mounted to the shaft 300 with its guide member 250 coupled to the rail 330, and fixed to the shaft 300 at a desired specific height H.
Further details of the structure of the dropping portion 200 will be described below with reference to FIG. 3, in which an enlarged view of the dropping portion is shown.
Referring to FIG. 3, the detachable members 201 and 202 having a structure facing each other include a lower support 220 supporting the entire lower end of the battery cell 400, and an elastic side support supporting the side of the battery. 230. When the drop test is to be performed in the direction of the electrode terminal 410 of the battery cell 400, the electrode terminal 410 is placed on the lower support 220 while the battery cell 400 is inverted, and the battery cell Both sides of the main body are supported by the pair of side support members 230, whereby the battery cells 400 are positioned in a drop shape.
The side support 230 has an upper end thereof inclined about 30 ° toward the battery cell 400, thereby effectively supporting the side surface of the battery cell 400. In addition, the side support 230 is made of a resilient rubber, hardly causing damage to the battery cell 400 when in contact with the side of the battery cell 400.
One end of the lower support 220 is formed with a fastening protrusion 222 that can be inserted into the horizontal groove of the guide member (not shown) to be coupled, and the lower support rear end 224 is the lower support 220. It is connected to an electric motor (not shown) that provides power to adjust the mutual spacing of the.
In addition, the induction member (not shown) for inducing the detachable member 201 to move horizontally in the horizontal direction while fixing the dropping part 200 to the shaft (not shown) is connected with the fastening protrusion 222. The bar is described with reference to FIG. 6, which shows a detailed structure of the induction member as follows.
Referring to FIG. 6, the induction member 250 has a horizontal groove 252 formed to be inserted into and coupled to the fastening protrusion 222 formed at one end of the lower supporter 220, and thus, in the operation process of the dropping device. The fastening protrusion 222 may be horizontally moved horizontally along the horizontal groove 252, resulting in horizontal movement of the lower support 220.
In addition, at the rear of the guide member 250, at least one fastening shaft 254 is inserted and connected to the indented rail (330 of FIG. 1) of the shaft (300 of FIG. 1). Therefore, in the state in which the fastening shaft 254 is connected to the indented rail 330, the induction member 250 may move up and down to a predetermined height, and at this height, for example, the induction member 250 Position fixing members (not shown, for example, bolts, etc.) located at the bottom of the can be coupled to the indented rail 330 to fix the position of the lower support 220 relative to the shaft 300. More details on this will be described later with reference to FIG. 5.
3 is an enlarged schematic diagram showing a state in which the battery cell is mounted by the detachable member in the dropping portion of FIG. 1, and FIG. 4 is an enlarged view showing the state in which the battery cell is detached by the detachable member in the dropping portion of FIG. 1. A schematic is shown.
Referring to these drawings, the lower support 220 is equipped with a sensor 228 for detecting a gap with a corresponding lower support corresponding to one side of the lower support 220, the lower support ( An electric motor (not shown) connected to the rear end 224 of the 220 is driven to separate the detachable members 201 and 202 from side to side.
At the beginning of the drop test, the lower supports 220 are mounted on the lower supports 220 such that the electrode terminals 410 of the battery cells 400 face downward while closely contacting the lower supports 220, and the lower supports 220. ) Are instantaneously spaced apart by a predetermined distance (W) by the electric motor to freely fall in the direction of the ground of the shaft to check whether the electrode terminal 410 is short-circuited.
FIG. 5 is a schematic diagram showing the guide member and the shaft in the state where the drop unit is not mounted in FIG. 1.
Referring to FIG. 5, the guide member 250 coupled to the drop part (not shown) vertically moves up and down along the indented rail 330 formed in the longitudinal direction L of the shaft 300. Specifically, the fastening shaft 254 of the induction member 250 may move in the vertical direction along the indented rail 330 of the shaft 330 which is elongated in the longitudinal direction, to a predetermined position (H). In the moved state, the position fixing member 256 installed on the lower end of the guide member 250 may be coupled to the indented rail 330 to perform position fixing.
Those skilled in the art to which the present invention pertains will be able to make various applications and modifications within the scope of the present invention based on the above contents.
As described above, according to the present invention, a drop portion consisting of a pair of detachable members for freely falling by fixedly mounting and detaching the battery cell to a predetermined drop shape of the battery drop test apparatus, the drop portion is predetermined from the ground By constructing a simple structure including a shaft mounted at a height of, the battery can be freely dropped to a desired ground position in a desired drop direction, so that a highly accurate drop test can be performed on a thin battery such as a plate-shaped battery. can do.
Claims (15)
- An apparatus for performing a test on a battery cell by dropping the battery cell at a predetermined height,By a change in the distance between each other, a fixed portion of the battery cell in a predetermined drop shape, instantaneous detachment made of a pair of detachable members to freely fall off; And a shaft on which the drop portion is mounted at a predetermined height from the ground. Consists of includingThe detachable member is formed of at least a lower support for supporting a part of the lower end of the battery, and at least a side support for supporting at least a part of the side of the battery, and is characterized in that the battery cell is temporarily detached after being fixedly mounted between the two detachable members. Drop test device.
- The drop test apparatus according to claim 1, wherein the drop part is mounted in a structure in which the height can be variably adjusted with respect to the shaft.
- The drop test apparatus according to claim 1, wherein a member (position fixing member) for fixing the position of the drop portion at a specific height is provided in the shaft or the drop portion.
- According to claim 1, The side of the shaft side fall portion is further provided with an induction member for the lower support for the lower support of the detachable member to move horizontally in the horizontal direction according to the operating conditions of the device, the drop portion is the induction The drop test apparatus, which is attached to the shaft at a predetermined height from the ground by the member.
- According to claim 4, The guide member is formed with a groove ('horizontal groove') in the horizontal direction in the longitudinal direction, one end of the falling portion is formed with a fastening protrusion for insertion is connected to the horizontal groove of the guide member Drop test apparatus, characterized in that.
- The drop test apparatus according to claim 1, wherein the side support of the detachable member is inclined in the direction of the battery cell so that its upper end can support the side of the battery cell.
- The drop test apparatus according to claim 1, wherein the side support is made of an elastic structure or an elastic material.
- The drop test apparatus according to claim 1, wherein a power member capable of adjusting a mutual gap between the detachable members is connected to the rear of the detachable member.
- 9. The drop test apparatus according to claim 8, wherein the power member is an electric motor.
- 10. The drop test apparatus according to claim 9, wherein one side or both sides of the detachable member are mounted with a sensor for detecting a gap therebetween, and a control unit for controlling the operation of the sensor and the electric motor.
- The drop test apparatus according to claim 1, wherein the battery cell is a secondary battery having a plate-like structure.
- 12. The drop test apparatus according to claim 11, wherein the secondary battery has a structure in which an electrode assembly is built in a pouch type case of a laminate sheet including a resin layer and a metal layer.
- A method of performing a test for the drop of the battery cell using the drop test device according to claim 1.
- The method of claim 13, wherein the battery cell is fixedly mounted in a drop shape between the detachable members in the dropping part of the drop test apparatus, and then detached instantaneously to induce free fall.
- 15. The method of claim 14, wherein the drop shape is a shape in which an electrode terminal of a battery cell faces the ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020070007790A KR101040978B1 (en) | 2007-01-25 | 2007-01-25 | Drop Test Device of Battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| KR1020070007790A KR101040978B1 (en) | 2007-01-25 | 2007-01-25 | Drop Test Device of Battery |
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| KR20080070144A true KR20080070144A (en) | 2008-07-30 |
| KR101040978B1 KR101040978B1 (en) | 2011-06-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| KR1020070007790A KR101040978B1 (en) | 2007-01-25 | 2007-01-25 | Drop Test Device of Battery |
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| KR (1) | KR101040978B1 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102004025A (en) * | 2010-12-30 | 2011-04-06 | 无锡市南亚科技有限公司 | Free drop test device |
| KR101275032B1 (en) * | 2012-03-19 | 2013-06-17 | 교통안전공단 | Drop testing apparatus for driven battery of automobile |
| CN104076288A (en) * | 2013-03-28 | 2014-10-01 | 深圳市海洋王照明工程有限公司 | Battery testing device |
| CN105352699A (en) * | 2015-11-18 | 2016-02-24 | 芜湖凯尔电气科技有限公司 | Weight impact testing apparatus of power battery |
| CN105352700A (en) * | 2015-11-18 | 2016-02-24 | 芜湖凯尔电气科技有限公司 | Free drop testing apparatus of lithium battery |
| CN105403375A (en) * | 2015-11-26 | 2016-03-16 | 芜湖凯尔电气科技有限公司 | Vibration and drop testing box of power battery |
| CN105486473A (en) * | 2015-11-18 | 2016-04-13 | 芜湖凯尔电气科技有限公司 | Simulated-driving test box for power battery |
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| CN103063396B (en) * | 2012-12-27 | 2015-06-10 | 天津力神电池股份有限公司 | Test method for reliability of polymer battery |
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| KR100480053B1 (en) | 2002-07-12 | 2005-03-30 | 엘지전자 주식회사 | Drop-test device for mobile-phone |
| JP2005030938A (en) | 2003-07-07 | 2005-02-03 | Uniden Corp | Drop tester |
| JP4386183B2 (en) | 2004-06-23 | 2009-12-16 | 日本電気株式会社 | Drop test apparatus and drop test method |
| JP4456010B2 (en) * | 2005-01-18 | 2010-04-28 | 株式会社日立テクノロジ−アンドサ−ビス | Drop test device |
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- 2007-01-25 KR KR1020070007790A patent/KR101040978B1/en active IP Right Grant
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102004025A (en) * | 2010-12-30 | 2011-04-06 | 无锡市南亚科技有限公司 | Free drop test device |
| KR101275032B1 (en) * | 2012-03-19 | 2013-06-17 | 교통안전공단 | Drop testing apparatus for driven battery of automobile |
| CN104076288A (en) * | 2013-03-28 | 2014-10-01 | 深圳市海洋王照明工程有限公司 | Battery testing device |
| CN105352699A (en) * | 2015-11-18 | 2016-02-24 | 芜湖凯尔电气科技有限公司 | Weight impact testing apparatus of power battery |
| CN105352700A (en) * | 2015-11-18 | 2016-02-24 | 芜湖凯尔电气科技有限公司 | Free drop testing apparatus of lithium battery |
| CN105486473A (en) * | 2015-11-18 | 2016-04-13 | 芜湖凯尔电气科技有限公司 | Simulated-driving test box for power battery |
| CN105403375A (en) * | 2015-11-26 | 2016-03-16 | 芜湖凯尔电气科技有限公司 | Vibration and drop testing box of power battery |
| CN106323577A (en) * | 2016-07-29 | 2017-01-11 | 重庆长安汽车股份有限公司 | Impact testing device for battery pack |
| CN106323577B (en) * | 2016-07-29 | 2018-11-20 | 重庆长安新能源汽车科技有限公司 | A kind of battery pack apparatus for impact testing |
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