This application claims the benefit of priority based on dated Korea Patent Application No. 10-2018-0017174 February 2018, and all information disclosed in the literature of the Korea patent application are included as part of the specification.
[3]
Art
[4]
The present invention relates to a current cut-off device, and relates to a battery module that includes the current cut-off device, the battery module comprising a current to improve the safety of the battery module blocking device and a current cut-off device.
BACKGROUND
[5]
As the demand for secondary batteries is repeated charge and discharge possible increase is also growing importance for the safety of the secondary battery. For example, there is required to be increased per unit volume capacity of the secondary battery, safety also with the secondary battery as much as increasing the capacity of the secondary battery because it is easy being to the safety of the secondary battery is more vulnerable as the per unit volume capacity of the secondary battery increases It needs to be improved. In particular, the lithium secondary battery is overcharged because if the larger the risk of ignition can be called safety problem in the lithium secondary battery are essential.
[6]
On the other hand, according to the prior art, such as the addition of such fire protection material in the electrolyte to be charged to the secondary battery to solve such a secondary battery inside the ignition problems described or used, and (Current Interrupt Device) CID therein secondary battery the technique of mounting the same device is used.
[7]
However, since the prior art safety device of a secondary battery according to techniques configuration for the safety of a secondary battery case of the battery module are secondary batteries assembled with a plurality formed limit the safety of the battery module only by the safety device according to the prior art; there is a problem that is.
[8]
For example, in the case of the battery module because it is electrically connected between the secondary battery, there is a problem that the overall temperature of the battery module abruptly raised by the electrical interaction between the secondary battery. Therefore, there is a separate and safety of the secondary battery have to be a dimensional stability in the battery module as a separate secure.
Detailed Description of the Invention
SUMMARY
[9]
The problem to be solved by the present invention is to ensure the safety of the battery module enhanced by preventing ignition that can be caused by electrical interaction between the secondary battery in the battery module.
Problem solving means
[10]
According to an aspect of the invention, the first connection slope is formed on one surface; The second connection is a slope having a shape corresponding to the slant of the first connecting portion formed on one surface; It includes, and the slopes of the sloped surface of the first connection and the second connection part is, and in contact with each other to form a contact surface with the first connecting portion and the second connection portion is electrically connected to said first connection to said first connection for It is more than a predetermined external force to the inclined direction or applied in the first case that is more than a predetermined external force to the inclined direction of the second connecting portion is applied to the second connecting portion, the inclined surface of the inclined plane and the second connecting portion of the first connecting portion displacement to each other at the contact surface as the first connection and the second connection the current block which is electrically isolated is provided.
[11]
It is formed in the contact face adhering to the slopes of the sloped surface of the first connection and the second connection portion to be adhered to each other; The may further include.
[12]
The first connecting portion and the pressing portion for pressing on the top or bottom of the second connection portion to the lower or upper side of the second connection portion and the first connection to the second connection of the first connecting portion; The may further include.
[13]
The pressing portion receiving portion for supporting said pressure to urge the said second connection and said first connection; The may further include.
[14]
The pressing portion is provided on the top and bottom of the second connection portion and the first connecting portion, the pressing portion can be pressed downwardly and upwardly of the second connecting portion of the first connecting portion.
[15]
The second is formed in the lateral side and the lateral side of the second connection of the first connection, the first connection and the second connection portion and the state coupled with the periphery of some of the secondary battery; The may further include.
[16]
The first connecting portion and the pressing portion for pressing on the top or bottom of the second connection portion to the upper or lower side of the second connection of the first connection to the second connection of the first connecting portion; The sum of the further included, and the adhesive strength (kgf / cm) and the pressing elastic modulus (kgf / cm) section of the adhesive may be from 2 to 5kgf / cm.
[17]
According to another aspect of the invention, the first cell; A second battery that is apart from the first cell; And a current cut-off device provided between the first cell and the second cell; Including, and the current blocking device, the first connecting portion inclined surface is formed on one surface; The second connection is a slope having a shape corresponding to the slant of the first connecting portion formed on one surface; It includes, and the slopes of the sloped surface of the first connection and the second connection part is, and in contact with each other to form a contact surface with the first connecting portion and the second connection portion is electrically connected to said first connection to said first connection for It is more than a predetermined external force to the inclined direction or applied in the first case that is more than a predetermined external force to the inclined direction of the second connecting portion is applied to the second connecting portion, the inclined surface of the inclined plane and the second connecting portion of the first connecting portion displacement to each other at the contact surface by the second connection portion and the first connection portion is provided with a battery module to be electrically isolated.
Effects of the Invention
[18]
According to the invention, the fire protection that can be caused by electrical interaction between the secondary battery in the battery module can be improved by the safety of the battery module.
Brief Description of the Drawings
[19]
1 is a perspective view showing a first example of a current blocking structure of the apparatus in the state in which the operation of the battery module according to the invention successfully.
[20]
Figure 2 is when the battery module is overcharged perspective view of a current block according to the first example showing the principle of a current block.
[21]
3 is a perspective view showing a second example of a current blocking structure of the device in the state in which the operation of the battery module according to the invention successfully.
[22]
Figure 4 is a perspective view when the battery module is overcharged, the current interrupting device according to the second example illustrating the principles of the current block.
[23]
Figure 5 is a perspective view showing a third example of a current blocking structure of the device in the state in which the operation of the battery module according to the invention successfully.
[24]
Figure 6 is a perspective view when the battery module is overcharged, the current interrupting device according to the third example illustrating the principles of the current block.
Mode for the Invention
[25]
Hereinafter, reference to the drawings, will be described the structure of the current cut-off device in accordance with the present invention.
[26]
A current blocking device
[27]
1 is a perspective view showing a first example of a current blocking structure of the apparatus in the state in which the operation of the battery module according to the invention successfully.
[28]
The battery module 10 according to the present invention as shown in Figure 1 may include a plurality of cells (100). A plurality of batteries 100 may be a rechargeable battery, for example, may be a lithium secondary battery. Figure 1 shows a first cell 110 and second cell 120 is shown as the configuration of the plurality of cells (100). However, the battery module 10 is of course that it is possible to include more than two cells. On the other hand, a plurality of cells constituting a battery module according to the present invention, there can each be provided with a lid 200. Figure 1 shows a case equipped with a respective first lead 210 and second lead 220 to the first cell 110 and second cell 120 is shown.
[29]
On the other hand, between the first cell 110 and second cell 120 may be provided with a current cut-off device (300).
[30]
The current cut-off device 300 according to the first embodiment of the present invention as shown in Figure 1 may include a plurality of connections formed in the inclined surface. That is, in the first connection portion 302 and the first connection portion 302, a current cut-off device 300 according to the first embodiment of the present invention is formed with a slope (SL, 2 Note) on one side as shown in Figure 1 may include a second coupling portion 304 is formed a slope corresponding to the slope. At this time, Being inclined to correspond to each other may mean that Seeing slopes are opposite. In addition, the shape and size of the inclined surfaces of the first connecting portion 302, the inclined surface and the second connecting portion 304 of the may be the same as each other.
[31]
In addition, the first connecting portion 302 may be connected and fixed to the first cell 110, the second connection portion 304 may be connected and fixed to the second cell 120. To this end, the outer side of the first connection part 302 has a first connection portion 302 may be provided with a first fixing portion 342 coupled with a portion around the portion of the first cell 110, the second connecting portion (304 ) outer part may be provided with a second coupling portion 304 and the second fixing part (344, coupled with a portion of the circumference of the second cell 120) a. The first fixing portion 342 as shown in Figure 1 may be provided on the one side provided with a first connection part 302 of the opposite side of the first cell 110, second fixing portion 344 the may be provided on the one side provided with a second connecting portion 304. the Moreover, the first fixing section 342, the second lead 220 of the first battery (110) of claim 1 can be coupled to the lead 210, the second fixing portion 344 of the second cell 120 and it can be combined. Further, although not shown in the figure, the first fixing portion 342 and the first cell (110) at least a portion has a adhesion material can be applied, the surface on which the peripheral portion coupling the second fixing portion 344 and at least a portion of the surface on which the peripheral portion of the bonded second cell 120 has the adhesive substance can be applied.
[32]
The slope of the first joint part 302 and the second coupling portion 304 may be connected with each of the first cell 110 and second cell 120, the first joint part 302 and the second connecting portion 304 each other, the contact can be formed in the contact surface. In addition, the there is a slope of the first joint part 302 and the second coupling portion 304 has a first connecting portion 302 the inclined surface and the second coupling portion 304 between the can be formed in the bonding portion 310 having the adhesive strength to be adhered to each other the present specification and claims the be construed to contact each other inclined surface of the first joint part 302 and the second connection portion 304, the first joint part 302 and the second coupling portion 304, even if provided with a bonding portion between the do.
[33]
The first joint part 302 and the second coupling portion 304 may be connected electrically to each other. At this time, it Is electrically connected to the can mean that the conditions for current to flow between the first joint part 302 and the second coupling portion 304. The first joint part 302 and the second coupling portion 304 has the bonding portion 310 to be electrically connected to may include a material having electric conductivity.
[34]
The current cut-off device 300 according to the first embodiment of the present invention as shown in Figure 1 are usually provided by being the first cell 110 and the second between the first cell 110 and second cell 120 the cell 120 may be electrically connected.
[35]
On the other hand, when it is one of a plurality of cells constituting the battery module in which some or all overcharge the battery due to overcharge such increased thickness of the gasification furnace and the electrode assembly in the electrolyte within the battery will swell.
[36]
Figure 2 is when the battery module is overcharged perspective view of a current block according to the first example showing the principle of a current block.
[37]
Referring to FIG. 2, when the first battery 110 is inflated a first cell 110 and exerts an external force to the slope direction of the first connecting portion 302 to the first connection portion 302, a second cell (120 if) the swollen second cell 120 exert an external force to the inclined direction of the second coupling portion 304 to the second coupling portion 304.
[38]
A first connection portion 302 or the second case the inclined direction of the inclined surface or the second coupling portion 304 of the first joint part 302, respectively in the coupling portion 304 which is an external force is applied, if such external force is less than a predetermined size, the first connection (302) and a second deformation in the current cut-off, including the connecting portion 304, device 300 does not occur. The is because the adhesive strength of the bonding portion 310, between the inclined surface and the inclined surface of the second coupling portion 304 of the first joint part 302 exists.
[39]
However, the first connection only the adhesive strength between the inclined surface of the inclined surface and the second connecting portion 304 of the first connector 302 when the external force that is larger than a certain size is applied to the connection portion 302 or the second connection portion 304 ( 302) and it is impossible to maintain the contact between the second connecting portion 304. the Accordingly, it is also to be shifted by the inclined surface and the inclined surface of the second coupling portion 304 of the first connecting portion 302 each other as shown in FIG. 2 is electrically isolated between the end the first joint part 302 and the second coupling portion 304 . Thus, the operation of the first battery 110 and the second cell are electrically isolated cell module 10 even between 120 stops.
[40]
3 is a perspective view showing a second example of a current blocking structure of the device in the state in which the operation of the battery module according to the invention successfully.
[41]
A current blocking device in accordance with a second embodiment of the present invention also the first joint part 302 and the second when the larger than a certain size, the external force acts on the coupling portion 304 the inclined surface of the first joint part 302 (SL, 4 reference) and second connection by 304, the deviation from each other inclined surfaces of the fact that such electrically isolated between the first joint part 302 and the second connection portion 304, a current cut-off according to the first example and the second example of the present invention apparatus to each other similar. However, the current cut-off device according to the second embodiment of the present invention in view of the detailed configuration for implementing such a principle is different from the current cut-off device according to the first embodiment of the present invention. In the following, it will be described in the current cut-off device according to the second embodiment of the present invention, with the focus on the differences with the current cut-off device according to the first embodiment of the present invention.
[42]
The current cut-off device 300 according to the second embodiment of the present invention as shown in Figure 3 includes a first connection portion 302 and the second is provided above or below the connecting portion 304, the first joint part 302 and the the second coupling portion 304 may include a pressing portion 320 for pressing in the downward or upward direction. For example, the unit pressure as shown in Figure 3 of the first joint part 302 and the second connection portion may be provided at the top and bottom, of the 304 first connecting portion 302 and the second coupling portion 304 the pressing portion 320 is provided in the upper portion of the first connecting portion 302 and the second can be pressed downward the second coupling portion 304, a first connection portion 302 and the pressure provided in the lower portion of the second coupling portion 304 portion 320 may be pressed upwardly to the first joint part 302 and the second coupling portion 304. At this time, the pressing unit 320 may be a configuration which has elasticity. For example, the pressing portion 320 may have a spring structure.
[43]
On the other hand, the pressing portion to pressurize the first connection portion 302 or the second coupling portion 304 may need to be supported by a different configuration. To this end, the current cut-off device 300 according to the second embodiment of the present invention, the pressing part 320 is for supporting the pressing portion 320 to urge the first joint part 302 and the second coupling portion 304 It may include a receiving portion 330.
[44]
At this time, as shown in Figure 3, the pressing portion 320, if provided on the top and bottom of the first joint part 302 and the second connection portion 304, the supporting unit 330 has a first connection portion 302 and the second of the first receiving portion 332 and the first connection portion 302 and the second connecting portion provided at the lower portion of the pressing portion 320 so as to support the pressing part 320 provided in the lower portion of the coupling portion 304 (304 ) may comprise a number of second receiving portion 334 provided at the upper portion of the pressing portion (the pressing portion 320 to support 320) provided in the upper portion.
[45]
Figure 4 is a perspective view when the battery module is overcharged, the current interrupting device according to the second example illustrating the principles of the current block.
[46]
Referring to Figure 4, when the first battery 110 is inflated a first cell 110 and exerts an external force to the slope direction of the first connecting portion 302 to the first connection portion 302, a second cell (120 if) the swollen second cell 120 exert an external force to the inclined direction of the second coupling portion 304 to the second coupling portion 304.
[47]
A first connection portion 302 or the second case the inclined direction of the inclined surface or the second coupling portion 304 of the first joint part 302, respectively in the coupling portion 304 which is an external force is applied, if such external force is less than a predetermined size, the first connection (302) and a second deformation in the current cut-off, including the connecting portion 304, device 300 does not occur. The slope of the first joint part 302 and the second connection portion 304, the first connection portion 302, the pressing unit 320 upward or downward by pressing the first connecting portion 302 and the second coupling portion 304 of the second 2 is because the static friction acting between the inclined surface of the coupling portion 304.
[48]
However, the first connection portion 302 or the second connection portion 304, the first connection only the static friction between the inclined surface of the inclined plane and the second connecting portion 304 of the first connector 302 when the external force which is above a predetermined magnitude acting on the it is impossible to keep the relationship between the contact 302 and the second coupling portion 304. Accordingly, it is to be a shifted from each other inclined surface of the first connection portion 302, the inclined surface and the second coupling portion 304, as shown in Figure 4 is electrically isolated between the end the first joint part 302 and the second coupling portion 304 . Thus, the operation of the first battery 110 and the second cell are electrically isolated cell module 10 even between 120 stops.
[49]
Figure 5 is a perspective view showing a third of the current cut-off device structure example of the state in which the operation of the battery module according to the invention normally, FIG. 6, if a battery module is excessive charging current block according to a third example, the device current a perspective view of the principle block.
[50]
A current cut-off device 300 according to the third embodiment of the present invention includes a pressing portion (320 a current cut-off device according to the second example of the bonding portion 310 and the current blocking device according to the first example of the present invention mentioned above invention ) and it may be a receiving part 330, the combined type. A current blocking device in accordance with at current cut-off device 300 according to the third embodiment of the present invention, description of the bonding portion 310, the pressing portion 320 and receiving portion 330 is a first example and a second example of the invention a description of it to be replaced.
[51]
Meanwhile, the current cut-off device according to the first example through the third example of the present invention are all, by the slope of the inclined surface and the second connection of the first connection part when the two or more predetermined size external force from the outside is shifted to each other the first connecting portion and the second Since to block the electrical connection between the connection portion, the first amount of external force, when a block electrical connection between the connection portion and the second connecting part be dependent on the intensity of the additional adhesive strength or the pressure in the bonding portion urges the first connection and the second connection can. In particular, in the case having a pressing portion for pressing the elastic strength of the pressing portion of the first connecting portion and second connecting portion can be seen that depending on the modulus of elasticity of the entire pressing unit. At this time, when it is provided with a plurality pressing portion, the elastic modulus of the entire pressing portion may be modified as long as there is a pressure element length of the entire unit having the current cut-off unit defined as the amount of force required.
[52]
However, the current cut-off device is an electrical block take place though an electrical block when the elastic modulus of the entire adhesive strength or the pressing portion of the bonding portion is too large, so becomes a too large amount of external force to the electrical barrier generated in accordance with the present invention this is not happening, there is a problem that can not be ensured the safety of the battery module.
[53]
Meanwhile, the rising phenomenon can occur even when the battery is swollen one, as well as the overcharge state, a state where the battery is stored at high temperatures. However, when the battery is simply stored at high temperatures, because the ignition potential of the battery is low, there is no need to be a current block. However, when the present invention is the elastic modulus for the entire current blocking device adhesive strength or the pressure of the bonding portion in too small according to have cells or even when the battery modules are simply stored in the high-temperature blocking of current is to occur defect rate of the battery module this is a problem that high. Thus, while the battery modules ensure safety at the same time be appropriately within a range that the elastic modulus of the entire adhesive strength or the pressing portion of the bonding portion in the production of manufactured and the battery module of the current cut-off device set to minimize the error rate of the battery module there is a need.
[54]
[55]
Example
[56]
In the following, by way of example and experimental example will be described in detail the contents of the present invention. However, Examples and Experimental Examples are not intended to be limited only and the scope of the invention by way of examples and experiment examples to illustrate for the description of the invention.
[57]
[58]
Example 1
[59]
In the first embodiment of the present invention it was used as the pressing parts of the current cut-off device. Young's modulus for the entire pressing portion was 3kgf / cm.
[60]
Example 1, the operations of the current cut-off after attached to a battery module manufactured a battery module unit, to overcharge the battery module or the battery module storage at high temperature was measured according to the current cut-off device.
[61]
[62]
Example 2
[63]
In a second embodiment of the present invention it was used as the pressing parts of the current cut-off device. Young's modulus for the entire pressing portion was 5kgf / cm.
[64]
Example 2 after the operations of the equipped with a current cut-off device in the battery module manufacturing a battery module, to overcharge the battery module or the battery module storage at high temperature was measured according to the current cut-off device. Carried out an overcharge condition and the high temperature state storage condition of the battery module of the battery module of Example 2 is the same as in Example 1.
[65]
[66]
Example 3
[67]
In a third embodiment of the present invention it was used with parts of the bonding portion and the pressure in the current cut-off device. Bonding strength of the bonding portion was 1kgf / cm, the elastic modulus of the entire pressing portion was 1kgf / cm. On the other hand, is defined and then the adhesive strength is a positive configuration of the bonding portion of the adhesive on the bonding surface in the bonding surface when the amount of tensile composed of the amount of force needed when tension by the amount of structural unit length.
[68]
Carried out after producing a battery module by mounting the current blocking device to the battery module according to Example 3, to overcharge the battery module or the battery module storage at high temperature was measured the operations of the current cut-off device. Carried out a high-temperature state of the battery module storage conditions overcharge condition and the battery module of Example 3 is the same as in Example 1.
[69]
[70]
Example 4
[71]
In a fourth embodiment of the present invention it was used with parts of the bonding portion and the pressure in the current cut-off device. Bonding strength of the bonding portion was 1kgf / cm, the elastic modulus of the entire pressing portion was 3kgf / cm.
[72]
Example 4 After the operations of the equipped with a current cut-off device in the battery module manufacturing a battery module, to overcharge the battery module or the battery module storage at high temperature was measured according to the current cut-off device. Carried out a high-temperature state of the battery module storage conditions overcharge condition and the battery module of Example 4 is the same as in Example 1.
[73]
[74]
Example 5
[75]
In a fifth embodiment of the present invention it was used for the bonding portion in the current cut-off device. Bonding strength of the bonding portion was 2kgf / cm.
[76]
Carried out after producing a battery module by mounting the current blocking device to the battery module according to Example 5, to overcharge the battery module or the battery module storage at high temperature was measured the operations of the current cut-off device. Carried out an overcharge condition and the high temperature state storage condition of the battery module of the battery module of Example 5 is the same as in Example 1.
[77]
[78]
Example 6
[79]
In a sixth embodiment of the present invention it was used with parts of the bonding portion and the pressure in the current cut-off device. Bonding strength of the bonding portion was 2kgf / cm, the elastic modulus of the entire pressing portion was 2kgf / cm.
[80]
Example 6 After preparing a cell module equipped with a current cut-off device in accordance with the battery module, to overcharge the battery module or the battery module storage at high temperature was measured the operations of the current cut-off device. Carried out a high-temperature state of the battery module storage conditions overcharge condition and the battery module of Example 6 is the same as in Example 1.
[81]
[82]
Comparative Example 1
[83]
In Comparative Example 1 was used as the pressing parts of the current cut-off device. Young's modulus for the entire pressing portion was 1kgf / cm.
[84]
After Comparative Example 1 equipped with a current cut-off device according to the battery module to prepare the battery module, to overcharge the battery module or the battery module storage at high temperature it was measured the operations of the current cut-off device. Comparing the overcharge condition and the high temperature state storage condition of the battery module of the battery module of Example 1 are the same as in Example 1.
[85]
[86]
Comparative Example 2
[87]
In Comparative Example 2 was used as the pressing parts of the current cut-off device. Young's modulus for the entire pressing portion was 7kgf / cm.
[88]
After Comparative Example 2 equipped with a current cut-off device according to the battery module to prepare the battery module, to overcharge the battery module or the battery module storage at high temperature it was measured the operations of the current cut-off device. Comparing the overcharge condition and the high temperature state storage condition of the battery module of the battery module of Example 2 is the same as in Example 1.
[89]
[90]
Comparative Example 3
[91]
In Comparative Example 3 was used for the bonding portion in the current cut-off device. Bonding strength of the bonding portion was 1kgf / cm.
[92]
Comparative after producing a battery module by mounting the current blocking device to the battery module according to Example 3, to overcharge the battery module or the battery module storage at high temperature was measured the operations of the current cut-off device. A high-temperature state of the battery module storage conditions overcharge condition and the battery module in Comparative Example 3 is the same as in Example 1.
[93]
[94]
Comparative Example 4
[95]
In Comparative Example 4 was used with parts of the bonding portion and the pressure in the current cut-off device. Bonding strength of the bonding portion was 1kgf / cm, the elastic modulus of the entire pressing portion was 5kgf / cm.
[96]
Comparative Example 4 After preparing a cell module equipped with a current cut-off device in accordance with the battery module, to overcharge the battery module or the battery module storage at high temperature was measured the operations of the current cut-off device. Comparing a high-temperature state storage condition of overcharge condition and the battery modules of the battery module of Example 4 is the same as in Example 1.
[97]
[98]
Comparative Example 5
[99]
In Comparative Example 5 was used with parts of the bonding portion and the pressure in the current cut-off device. Bonding strength of the bonding portion was 2kgf / cm, the elastic modulus of the entire pressing portion was 5kgf / cm.
[100]
Comparative after producing a battery module by mounting the current blocking device to the battery module according to Example 5, to overcharge the battery module or the battery module storage at high temperature was measured the operations of the current cut-off device. Comparing the overcharge condition and the high temperature state storage condition of the battery module of the battery module of Example 5 is the same as in Example 1.
[101]
[102]
Experimental Example 1
[103]
Experimental Example 1 In Examples 1 to 6 and Comparative Example 1 after the overcharge the battery module manufactured by to 5, a current cut-off device was measured whether or not interrupt the current.
[104]
Overcharged condition of the battery module are as follows. State of charge (SOC, state of charge) is the whole 100% of one to a battery module voltage of the series connection of five 4.2V of the battery when overcharge by 50% the battery module voltage 31.5V (4.2V * 5 * 1.5 ) was such that the. In the state where the overcharge when the constant current (constant current) of the battery module was filled to flow for 1 hour.
[105]
[106]
Experimental Example 2
[107]
Experimental Example 2 In Examples 1-6 and Comparative Example 1 after storing the battery module manufactured by a high-temperature state to 5, whether the current blocking device to block current was measured or not.
[108]
A high-temperature state of the battery module storage conditions are as follows. Carried out after filling so that the 100% state of charge (SOC) of the battery module in Example 2 were stored for 8 weeks at 60 degrees Celsius chamber.
[109]
[110]
Embodiment shown in Examples and Comparative Examples with respect to the battery module of Experimental Example 1 and Experimental Example 2 and then proceed to the table to look at the result first.
[111]
[112]
TABLE 1
division Example Comparative Example
1 2 3 4 5 6 1 2 3 4 5
Experimental Example 1 Block search Block search Block search Block search Block search Block search Block search Not blocking Block search Not blocking Not blocking
Experimental Example 2 Not blocking Not blocking Not blocking Not blocking Not blocking Not blocking Block search Not blocking Block search Not blocking Not blocking

[113]
Referring to Table 1, Example 1, the sum of the elastic strength of the entire adhesive strength and the pressing portion of the bonding portion in the through 6 respectively 3kgf / cm, 5kgf / cm, 2kgf / cm, 4kgf / cm, 2kgf / cm and 4kgf / cm was, this time, in the current cut-off device of experimental example 1 woke up this interrupts the current, the current is cut off did not occur in the current cut-off device of experimental example 2.
[114]
If the modulus of elasticity of the entire adhesive strength or the pressing portion of the bonding portion in the current interruption device according to the invention as described above is too large, since the magnitude of the external force to the electrical blocking occurs too large electrical though an electrical block take place not being of blocking is ensured the safety of not the battery module occur, if at current cut-off device according to the invention the modulus of elasticity of the entire adhesive strength or the pressing portion of the bonding portion is too small, the battery or battery modules are simply stored in the high-temperature , a block of the current is to occur even when there is a problem in that a higher failure rate of the battery module. By the way, in Examples 1 to 6 For, as shown in Table 1, by the electrical blocking occurs when an electrical block must take place while the battery module safety, the battery module has an electrical cut off if the high-temperature storage conditions as you can see it is not that no defect occurring in the battery module happen.
[115]
On the other hand, Comparative Example 1 and the case of three was the elastic strength of the entire adhesive strength or the pressing portion of the bonding portion 1kgf / cm, the safety of the case of Experimental Example battery module by the electrical blocking occurs in 1 but secure, the battery module is even if the high-temperature storage conditions can be found that they have an electrical blocking is a defect occurs in the battery module by occurs.
[116]
In Comparative Example 2, 4 and 5 For the elastic strength of the entire part adhering strength and the pressure of the bonding portion is was respectively 7kgf / cm, 6kfg / cm, 7kfg / cm, the case of Experimental Example 2, the battery module high-temperature storage conditions If the it was confirmed that the electrical block is although not a defect in the battery module does occur occurs, not in experimental example 1 the safety of the battery module by the electrical blocking does not occur in the overcharged state is not secured.
[117]
Therefore, there can not resolve the current blocking device, when the bonding strength with the sum of the elastic strength of the entire pressing portion of the bonding portion is 2 to 5kgf / cm at the same time while ensuring the safety of the battery module bad problem in the battery module according to the invention can confirm.
[118]
[119]
The present invention in the above Although the detailed description and specific examples, the invention is not limited thereto, the substrate under the technical scope of the present invention by one of ordinary skill in the art various embodiments within the equivalent scope of the claims to be possible as a matter of course.

WE Claims

[Claim 1]

First connection slope is formed on one surface; The second connection is a slope having a shape corresponding to the slant of the first connecting portion formed on one surface; It includes, and the slopes of the sloped surface of the first connection and the second connection part is, and in contact with each other to form a contact surface with the first connecting portion and the second connection portion is electrically connected to said first connection to said first connection for It is more than a predetermined external force to the inclined direction or applied in the first case that is more than a predetermined external force to the inclined direction of the second connecting portion is applied to the second connecting portion, the inclined surface of the inclined plane and the second connecting portion of the first connecting portion displacement to each other at the contact surface as the first connection and the current block is the second connection portion is electrically isolated device.
[Claim 2]
In claim 1, it is formed in the contact face adhering to the slopes of the sloped surface of the first connection and the second connection portion to be adhered to each other; A current cut-off device further comprising.
[Claim 3]
In claim 1, wherein the first connecting portion and the pressing portion for pressing on the top or bottom of the second connection portion to the lower or upper side of the first connection and the second connection portion and the first connection of the second connecting portion; A current cut-off device further comprising.
[Claim 4]
In claim 3, the receiving portion supporting said pressing the pressing portion to urge the second connecting portion of the first connecting portion; A current cut-off device further comprising.
[Claim 5]
In claim 3, the pressing portion for pressing downwardly a current cut-off device, and above the first connecting portion and being provided at the top and bottom of the second connecting portion, and the pressing portion of the first connection and the second connection portion.
[Claim 6]
In claim 1, it is formed in the lateral side and the lateral side of the second connection of the first connecting portion, the first connection and the second connection portion and the state is combined with a part circumference of the secondary battery; A current cut-off device further comprising.
[Claim 7]
In claim 2, the first connecting portion and the pressing portion for pressing on the top or bottom of the second connection portion to the upper or lower side of the second connection of the first connection to the second connection of the first connecting portion; Further comprising and the current cut-off sum of the adhesive strength (kgf / cm) and the press portion elastic modulus (kgf / cm) of the adhesive is 2 to 5kgf / cm device.
[Claim 8]
A first battery; A second battery that is apart from the first cell; And a current cut-off device provided between the first cell and the second cell; Including, and the current blocking device, the first connecting portion inclined surface is formed on one surface; The second connection is a slope having a shape corresponding to the slant of the first connecting portion formed on one surface; It includes, and the slopes of the sloped surface of the first connection and the second connection part is, and in contact with each other to form a contact surface with the first connecting portion and the second connection portion is electrically connected to said first connection to said first connection for It is more than a predetermined external force to the inclined direction or applied in the first case that is more than a predetermined external force to the inclined direction of the second connecting portion is applied to the second connecting portion, the inclined surface of the inclined plane and the second connecting portion of the first connecting portion displacement to each other at the contact surface as the battery module and the first connection portion to which the second connection is electrically isolated.