1]The present invention relates to a battery pack and vehicle including the same and a battery module, more particularly, to a battery pack and vehicle comprising the same and the battery module is improved stability by preventing overcharging of the battery module.
[2]This application claims priority from Korea Application No. 10-2017-0076020, filed on June 15, 2017 date, and everything about it is incorporated into this application by reference.
[3]
BACKGROUND
[4]
In recent years the demand for portable electronic products such as laptops, video cameras, portable telephones are rapidly increasing, the electric vehicle, energy as storage batteries, robots, and the full-fledged development of satellites for, repeated charging and discharging a high-performance rechargeable batteries the research has been going on actively.
[5]
As of commercially available secondary batteries are nickel-cadmium batteries, nickel hydrogen batteries, there are nickel-zinc batteries, lithium secondary batteries, etc., of which the lithium secondary battery is not to the memory effect hardly occurs as compared to a secondary battery of nickel-based free and can be charged and discharged, self-discharge rate was very low, the spotlight as a high energy density advantages.
[6]
The lithium secondary battery mainly uses a lithium-based oxide and carbon materials as an anode active material and the negative active material. The lithium secondary battery is provided with such a positive electrode active material and the negative electrode active material are respectively coated with the positive electrode plate and the negative electrode plate with a separator disposed between the electrode assembly and the casing for sealing the housing with the electrode assembly and an electrolyte, that is, the battery case.
[7]
Generally, lithium secondary batteries according to the shape of the casing, the electrode assembly may be classified as a pouch-shaped secondary cell with a can type secondary battery with an electrode assembly that is embedded in a metal can be incorporated in a pouch of an aluminum laminate sheet.
[8]
In recent years, as well as small equipment such as portable electronic devices, has become a widely used secondary batteries in the middle- or large-sized devices, such as automobiles and electric power storage device. In particular, As-carbon energy is depleted gradually increasing interest in the environment has become a high-profile focus on the worldwide hybrid cars and electric vehicles, including the United States, Europe, Japan and Korea. The central part in such a hybrid vehicle or the electric vehicle is a battery pack for imparting a driving force to the motor vehicle. The hybrid vehicle or electric vehicle situation where users are increasingly significant increases in the sense that it is possible to obtain a driving force of the vehicle through the charging and discharging of the battery pack, the excellent fuel economy as compared to only a vehicle using the engine can be reduced or not emit pollutants to be. Then, the battery pack of such a hybrid vehicle or an electric vehicle includes a plurality of secondary batteries, the large number of these secondary batteries are improved capacity and the output being connected to one another in series and in parallel.
[9]
The secondary battery, but have excellent electrical properties, overcharge, over-discharge, the decomposition reaction of the high temperature exposure, electrical short, etc. components which are the active material of the battery under abnormal operating conditions, the electrolyte is induced heat and the gas is generated, This secondary there is the problem, a so-called swelling phenomenon of the battery expansion occurs. Swelling phenomenon may result in explosion or ignition of the secondary battery due to thermal runaway to accelerate this reaction.
[10]
Accordingly, the secondary battery block when the pressure rising current corresponding to the overcharge, over-discharge, PTC element (Positive Temperature Coefficient Element), a gas generator for protecting a circuit to block over-current when the current, the temperature is increased significantly increases when the resistance to cut off the current or the gas is provided with a safety system, such as a safety vent to exhaust.
[11]
In particular, the prior art has, when the inflated volume of the secondary battery consisting of a study of the electrical connection member to be unit cells by a physical change to the bar, even if the swelling phenomenon occurs to ensure the safety of the battery pack.
[12]
However, even with this electrical connection member it is difficult to reliably ensure the secondary cell when unit cells are expanded by more than a predetermined volume.
[13]
Further, the secondary battery's within the normal range bar, repeating a predetermined expansion and contraction even when the normal operating condition, non-abnormal operating conditions can also be the interruption time of the expansion work, there is a problem in reliability.
[14]
Detailed Description of the Invention
SUMMARY
[15]
The present invention was electrically connected to the first battery cell and the second towards the accept is the expansion force due to the battery cell one increases more the volume of the first bus bar and second bus bar to move and contact to the first bus bar and second bus bar paragraph (Short) is, the breaking part fracture formed by the first bus bar to be caused there is provided a battery pack and vehicle including the same and a battery module capable of preventing the overcharge of the battery module.
[16]
An object of the present invention are not limited to the purposes mentioned above, and this is not mentioned will be understood by the other objects and advantages of the following description of the invention, it will be more clearly understood by an embodiment of the invention. Also, the objects and advantages of the invention will be readily appreciated that this can be realized by the means as claimed and combinations thereof.
[17]
Problem solving means
[18]
The technical problem the battery module according to the present invention for solving the first battery first electrode lead and electrically connected to the first bus bar, a second battery second electrode leads and electrically connected to the second bus bar of the cell in the cell, the first battery cell and the second battery applying the expansive force caused by one or more of the volume increase of the cell received by moving toward the first bus bar and the second bus bar to the first bus bar and the second bus bar electrically connected to to include a short circuit part for generating a short circuit (Short) and the first electrode lead and said second electrode lead, the first bus bar, the second bus bar and a cartridge for containing or supporting at least a part of the short-circuit portion.
[19]
Preferably, the short-circuit portion one end is supported on the inner side of the cartridge, the short-circuit terminal receiving applying the elastic force to the elastic member one end to provide an elastic force in a direction opposite to the expanding force from the elastic member to contact the other end of the elastic member provided, and the slide bar, and one end having a rack gear formed along a surface of the other end engaged with said rack gear and a pinion gear for supporting the other end of the slide bar, the other end of the first battery cell and a second battery cell, in contact with each end it may include a transmission receiving the expanding force is applied to the expanding force.
[20]
Preferably, the slide bars may be spaced apart from the first battery cell and the second battery cell does not both increase in volume, when the first battery cell and a second battery cell, the short-circuit terminal only is receiving the spring force .
[21]
Preferably, the expanding force transmitting portion when the first battery cell and the second battery cell, one or more of the volume of the increase, and accept applying the expanding force directed towards the first bus bar and the second bus bar, the received application through the expanding force of the pinion gear engages with the rack gear may transfer the slide bar.
[22]
Preferably, the slide bar when the first battery cell and the second battery cell, one or more of the volume of the increase, through the meshes the rack gear and the pinion gear receives the expansion force of the first bus bar and the first 2 can be moved towards the bus-bar.
[23]
Preferably, the short-circuit terminal may generate a short circuit by electrically connecting the first bus bar and the contact bar and the second bus, the first bus bar and the second bus bar.
[24]
Preferably, the shorting terminal may be formed of a conductive material.
[25]
Preferably, the cartridge has a receiving space of a shape corresponding to the outer short-circuit portion is formed on the inner side can be accommodated inside the short-circuit portion.
[26]
Preferably, the receiving space may be formed so as to correspond to the volume of the elastic member according to the restored state of the elastic member.
[27]
Preferably, each of the cartridge-to-face contact and electrically connected to the first electrode leads and the first bus bar, each of at least the supporting part, face-to-face contact and electrically connected to the second electrode leads and the second bus bar you can support at least a portion.
[28]
Preferably, at least one of the first bus bar and the second bus bar may include a fracture that when said short-circuit occurs, the breaking off the electrical connection with the outside.
[29]
The battery pack according to the present invention may include the battery module.
[30]
Vehicles according to the present invention may include the battery module.
[31]
Effects of the Invention
[32]
By, according to the present invention, such that between the first battery cell and the second first bus bar through the expansion force due to the battery cell one increases more the volume of and a second bus bar electrically connected to, and thus ensure that a short circuit occurs, the first the bus bar and the second bus bar is at least a portion broken fracture formed in any of the possible to improve the stability of the battery module to prevent excessive charging of the battery modules.
[33]
Brief Description of the Drawings
[34]
1 is a perspective view of a battery module according to an embodiment of the present invention.
[35]
Figure 2 is an exploded perspective view of a battery module according to an embodiment of the present invention.
[36]
Figure 3 is a view showing the upper surface prior to increasing the volume of the battery module in accordance with one embodiment of the present invention.
[37]
Figure 4 is a view showing only the first battery cell, the first bus bar, the second battery cell and the second bus bar of the battery module in accordance with one embodiment of the present invention.
[38]
5 is a diagram showing the side before breaking additional breakage of the battery module according to an embodiment of the present invention.
[39]
6 is a diagram showing the side after the breaking portion of the battery module in accordance with one embodiment of the present invention breaks.
[40]
Figure 7 is a perspective view of short circuit portion of the battery module according to an embodiment of the present invention.
[41]
8 is a diagram illustrating a top surface of a cut part in a cartridge component of the battery module according to an embodiment of the invention state.
[42]
9 is a view showing the top surface after the increasing volume of the battery module in accordance with one embodiment of the present invention.
[43]
10 is an equivalent circuit previous overcharge of the battery module in accordance with one embodiment of the present invention.
[44]
11 is an equivalent circuit diagram of the immediately after the overcharge of the battery module in accordance with one embodiment of the present invention short-circuit portion moves.
[45]
12 is an equivalent circuit diagram after the movement after the overcharge of the battery module in accordance with one embodiment of the present invention added to a paragraph break portion breaking.
[46]
13 is a view showing a cross-section of a battery module according to an embodiment of the invention cartridge.
[47]
Figure 14 is a perspective view of the inner cartridge in the battery module according to an embodiment of the present invention.
[48]
Mode for the Invention
[49]
The foregoing object, features and advantages will be able to easily carry out self technical features of the present invention one of ordinary skill in the art are described later in detail with reference to the accompanying drawings, accordingly. If the detailed description of the known art related to the invention In the following description of the present invention that are determined to unnecessarily obscure the subject matter of the present invention, and detailed description thereof will not be given. It will be described in the following, a preferred embodiment according to the present invention with reference to the accompanying drawings, for example, in detail. Like reference numerals in the drawings it is used to refer to same or similar elements.
[50]
Figure 1 is a perspective view of a battery module according to an embodiment of the present invention, Figure 2 is an exploded perspective view of a battery module according to an embodiment of the present invention, Figure 3 is the volume of the battery module in accordance with one embodiment of the present invention a view showing the upper surface before the increase.
[51]
1 to 3, the battery module according to an embodiment of the present invention may comprise a battery cell (110a, 110b), a bus bar (200a, 200b), the short circuit part 300 and cartridge 400, have.
[52]
Said battery cells (110a, 110b) may be provided with multiple pieces, each battery cell (110a, 110b) can be stacked side by side in the lateral direction.
[53]
Battery cells (110a, 110b) of the kind is not particularly limited and may be employed in the battery module according to the present invention, a variety of secondary batteries. For example, the battery cells (110a, 110b) may be composed of the lithium ion batteries, lithium polymer batteries, nickel cadmium batteries, nickel hydrogen batteries, nickel zinc batteries and so on. In particular, the battery cell (110a, 110b) may be a lithium secondary battery.
[54]
On the other hand, can be classified into a pouch-shaped, cylindrical, square, etc., depending on the type of packaging material are battery cells (110a, 110b). In particular, the battery cell (110a, 110b) of the battery module in accordance with the present invention may be a pouch-type secondary battery.
[55]
Battery cells (110a, 110b) in this case is implemented as a pouch-shaped secondary battery, as shown in Figure 2, each battery cell (110a, 110b) is located on the right side and a wide side with each other left, each battery cell (110a , 110b) may be configured such that the wide surfaces facing each other between. In this case, each battery cell (110a, 110b) may be provided with an electrode lead (120a, 120b) formed in a bent shape to be protruded toward the front.
[56]
Electrode leads (120a, 120b) may be of a positive electrode lead and negative electrode lead, a positive electrode lead is connected to the positive electrode plate of the electrode assembly, the negative electrode lead may be connected to the negative electrode plate of the electrode assembly.
[57]
On the other hand, the battery cells (110a, 110b) according to the invention can be of a first battery cell (110a) and a second battery cell (110b) located in the right position to the left. In this case, the first battery cell (110a) and a second battery cell (110b) of each electrode lead is an electrode lead (120a, 120b) of the other polarity may be arranged to face the same direction.
[58]
In more detail, as shown in Figure 2, the first battery cell (110a) is a positive electrode of claim and the first electrode lead (120a) may be arranged to face the front, the second battery cell (110b) is a negative electrode of claim second electrode leads (120b) may be disposed so as to face the front.
[59]
In addition, the first battery cell (110a) is a negative electrode of the second electrode leads (120b) that can be disposed to face the rear, the second battery cell (110b) is the anode of a first electrode lead (120a) facing the rear that can be placed.
[60]
In this case, the first the second the first electrode leads (120b) of the electrode leads (120b) and the second battery cell (110b) of the battery cell (110a) may be electrically connected.
[61]
On the other hand, the first electrode lead (120a) of the battery cell (110a) may be applied to the anode voltage being coupled to the first bus bar (200a) to be described later and electrically, from an external voltage source. In addition, the second being a battery cell (110b) the second electrode lead (120b) is a second bus bar (200b) and electrically connected to be described later, and may be applied to a cathode voltage from an external voltage source.
[62]
Here, the first bus bar (200a) may be mobile bus electrically connected to the first electrode lead (120a) of the first battery cell (110a) from the bus bar (200a, 200b) according to the present invention, the second bus bar (200b) may be mobile bus that the bus bar (200a, 200b) connected in the second lead electrode (120b) electrically of the second battery cell (110b) in accordance with the present invention.
[63]
Second electrode leads (120b) of the first battery cell (110a) the first electrode lead (120a) and the first bus bar (200a) connected to the structure and a second battery cell (110b) between the according to the invention from below and the 2 shall be described in detail for the connection structure between the bus bars (200b).
[64]
Figure 4 is a view showing only the first battery cell, the first bus bar, the second battery cell and the second bus bar of the battery module in accordance with one embodiment of the present invention.
[65]
First bus being also further reference to Figure 4, a first electrode lead (120a) of the battery cell (110a) is doedaga protrudes toward the front from the first battery cell (110a) bent in a substantially right angle towards the outside of the battery module facing the bar (200a) may be contacted.
[66]
In addition, the first electrode of the second battery cell (110b) the second electrode lead (120b) to the second battery cell doedaga protrudes toward the front outer That is, the first battery cell (110a) above the battery module from (110b) of toward the direction opposite the leads (120a) bent in a bending direction being substantially at right angles can be contacted face-to-face with the second bus bar (200b).
[67]
A first bus bar (200a) and a second bus bar (200b) may be a long plate in a vertical direction to form a plurality of bent shape at a right angle.
[68]
More specifically, the first bus bar (200a) is a first electrode lead (120a) to the first bent part (B1) bent perpendicularly toward the front doedaga face-to-face contact of the battery cell (110a), a first bent part (B1) be extended from the bent toward the inner side of the battery module, the second bent part (B2), a second bent part a third bent portion (B3) extending be bent toward the front of the battery module from, a third (B2) bent portions be extended from (B3) the fourth bent portion (B4), the fourth bent portion (B4) of the fifth bend (B5) bent toward the front of the battery module to be extended from the bent towards the outside of the battery module It may be provided.
[69]
Also, the second bus bar (200b) is a second battery cell (110b) the second electrode lead (120b) and the face-to-face contact doedaga bent perpendicularly toward the front sixth bent portion (B6), the sixth folding the portion (B6 ) seventh bend (B7) an elongated be bent toward the inner side of the battery module from the seventh bend (be extended from the B7) an eighth bend (B8 bent toward the front of the battery module), an eighth bend be extended from the (B8) be extended from the ninth bending the bent towards the outside of the battery module unit (B9), the ninth bending portion (B9) to be provided with a tenth bent part (B10) bent toward the front of the battery module can.
[70]
At this time, the first bus bar (200a) and a second bus bar (200b), respectively the second bent part (B2) and 7 by extending bent towards each other from the bent portion (B7), the separation distance decreases, the third bending by unit (B3) and the eighth bend is (B8) bent toward the front of the battery module from extending parallel to a distance can be maintained.
[71]
This eighth bend section (B8) is by proximal, below the short circuit part (300 in Fig. 3) of the first bus bar (200a), the third bent portion (B3) and a second bus bar (200b) of the through a slide bar (320 in Fig. 3) even if the width of the short-circuit terminal (322 in FIG. 3) formed at the other end to form short contacts at the same time as a first bus bar (200a) and a second bus bar (200b), a first bus bar ( 200a) and the second may be electrically shorted to bus bars (200b).
[72]
On the other hand, the first support grooves of the first electrode lead (120a) and the first bus bar (200a), the cartridge (Fig. 400 in Fig. 2) which will be described later in the electrically connected state face to face contact with the battery cells (110a) (FIG. 2 430) can be supported in part is inserted.
[73]
Further, the second support groove of the second electrode leads (120b) and a second bus bar (200b) from the cartridge (FIG. 400 in Fig. 2) which will be described later in the electrically connected state face to face contact of the battery cell (110b) (Fig. 2 430) can be supported in part is inserted.
[74]
It will be described later to the abovementioned cartridge (400 Fig. 2) to be described in detail.
[75]
Diagram 5 illustrates a side after the breaking portion of the battery module according to an exemplary embodiment of a diagram showing the side before the rupture of the battery module portion cutaway, Figure 6 is the invention according to one embodiment of the present invention rupture ego
[76]
5 and further reference to Figure 6, a first bus bar (200a) has a first bent portion (B1) and the second the interval of the bent part (B2) has a first bent portion (B1) and the second bend section ( the cross-sectional area than the outer section between a B2) may be formed with a narrow breaking portion (210a).
[77]
This, the breakable portion (210a) may increase the resistance value as between the narrow cross-sectional area than the outer section of the first bent portion (B1) and the second bent part (B2).
[78]
Thus, the breakable portion (210a) includes a first bus bar (200a) and a second bus bar (Fig. 3 of 200b) is electrically connected to the first bus bar (200a), a second bus bar (200b in FIG. 3) and when a short circuit is formed between an external voltage source, as shown in FIG. 6, the over-current to the first bus bar (200a) flows can be broken by generating the resistance heat of a high temperature.
[79]
Thereby, the battery module according to the present invention includes a first electrode leads of the first bus bar (200a) and the second bus bar is connected to an electrical (200b in FIG. 3) when a short circuit occurs, the first battery cell (110a) ( 120a) and a breaking the breakable portion (210a) of the first bus bar (200a) for electrically connecting between an external voltage source. Thus, it can be charged is interrupted.
[80]
That is, the battery module according to the invention is first the expansion force caused by increase due to the excessive charging volume of the battery module (110a) short-circuit part by applying (300 in Fig. 3) the first bus bar (200a) and a second bus bar a (200b in FIG. 3) can be electrically connected. Then, the battery module according to the present invention includes a first bus bar (200a) and the second bus bar breakable portion (210a) of the first bus bar (200a) due to the short-circuit current of the high current flowing in (200b in FIG. 3) is broken thereby, it is possible to stop charging to prevent the progression of overcharge of the battery module.
[81]
On the other hand, the breakable portion (210a) of the battery module in accordance with one embodiment of the present invention includes a first been described as being formed on the bus bar (200a), rupture of the battery module according to another embodiment of the present invention part the second bus bar, It can be formed, and a breaking unit of a battery module according to still another embodiment of the present invention may be formed on both the first bus bar and second bus bar.
[82]
Moreover, the breakable portion (210a) is, as described above, as compared to adjacent regions, but may be a width formed to be narrower, can also not limited to this, if made of a low-melting metal than the adjacent areas, and the other fuse If that can function as a form is applicable without limit as the breakable portion (210a) of the present invention.
[83]
Hereinafter to be described in detail in the above-mentioned short-circuit part (300).
[84]
7 is a perspective view of short circuit portion of the battery module in accordance with one embodiment of the present invention, Figure 8 is a view showing the upper surface of the cutting part cartridge from the components of the battery module according to an embodiment of the invention state.
[85]
7 and 8, the short circuit part 300 includes a first battery cell (110a) and a second battery cell (110b) of the application receiving the bar (200a), the first bus the expansion force due to a increase over the volume and the 2 moves toward the bus bar (200b) and by contact with the first bus bar (200a) and a second bus bar (200b), may cause a short circuit.
[86]
To this end, the short-circuit part 300 may include an elastic member 310, a slide bar 320 and an expansion force transmission portion (330a, 330b).
[87]
Elastic members 310 may be supported on the inner side of the one end of the cartridge 400, as shown in Figure 8 provides an elastic force in a direction opposite to the expanding force.
[88]
More specifically, the elastic member 310 includes a spring (S) between the second plate (P2) in contact with the inner side of the first plate (P1) and the cartridge (400) in contact with one end of the slide bar 320 is inserted being formed is, in a direction (a) and the direction (b) to the cartridge 400 to the slide bar 320 may provide elastic force.
[89]
At this time, the slide bar 320 may have a short-circuit terminal 322 is in contact with the second plate (P2) of the one that is the elastic force from the elastic member 310 is an elastic member (310).
[90]
In other words, once the short-circuit terminal plate 322 of the shape provided on the slide bar 320 by surface contact with the second plate (P2) of the elastic member 310, it can be applied to an elastic force of a direction.
[91]
On the other hand, the other end of the slide bar 320 may be provided with a rack gear 321 formed with a plurality of projections projecting along a surface.
[92]
More specifically, the slide bar 320 may be of a second plate perpendicular to the tangent at the end of this first plate with the first plate elongated from one end to the other end. That is, slide bars 320 can be perpendicular to the enemy two plates formed in a 'T' shape.
[93]
Here, the first other end surface is formed with the above-described rack gear 321 of the plate, a rack gear 321 may be of a plurality of protrusions protruding.
[94]
Expanding force transmission portion (330a, 330b) is a rack formed on the first expansive force transmission portion (330a), right side surface in contact with a rack gear 321 formed on the left side surface in the other end surface of the rack gear 321 of the slide bar 320, may be of a second expansion force transmitting portion (330b) which contacts the gear (321).
[95]
A first expansion force transmission part may be (330a) and the second expanding force transmitting portion (330b) is a component with a role is the same, and the shapes of the left and right to the other end from one end symmetry.
[96]
Accordingly, in order to avoid the repeated description on behalf of the expansion force transmission portion (330a, 330b) it will be described only the first expansion force transmission portion (330a).
[97]
A first expansion force transmission portion (330a) it may be provided with a pinion gear (331a) for supporting the other end of the slide bar 320 is engaged with the rack gear 321 at one end.
[98]
More specifically, once the pinion gear (331a) provided in the expanding force of the first transmission portion (330a) is formed in a disc shape, a plurality of protrusions may be formed to project along the outer periphery of the disc.
[99]
Thus, the plurality of protrusions of the pinion gieon (331a) is capable of fixing and supporting a plurality of projections being inserted between the first expansion force transmission portion (330a), the slide bar 320 of the rack gear 321.
[100]
On the other hand, the other end of the first expansion force transmission portion (330a) can be applied to a first when the one end is in contact with the volume of the first battery cell (110a) of the battery cell (110a) increases, the expanding force.
[101]
At this time, the first being the other terminal end of the expansion force between the transmission portion (330a) is formed with a plurality of bent portions, it is possible to be disposed in the space formed between the first battery cell (110a) and a slide bar (320).
[102]
That is, the other end of the slide bar 320 is gear-connected to the first battery cell (110a) and a second battery cell (110b) and a first expansion force transmission portion (330a) and the second expanding force transmitting portion (330b) contacts each one end of the slide bar 320 has an elastic force from the elastic member 310 contacts the inner side of the cartridge 400 can be applied.
[103]
Through this, the first battery cell (110a) and a second battery cell (110b), if all is not inflated, the shorting terminal 322 of the slide bar 320 includes a first bus bar (200a) and a second bus bar ( applying a resilient force enough to be spaced apart and 200b) from the elastic member 320 may be received not in contact with the first bus bar (200a) and a second bus bar (200b).
[104]
9 is a view showing the top surface after the increasing volume of the battery module in accordance with one embodiment of the present invention.
[105]
With further reference to Figure 9, the battery module is the battery cell to one or more of one (110a) and a second battery cell (110b) a volume increase when overcharging. In this case, the If 1 when the volume of the battery cell (110a) increased is the expansion force is in the first expansion force transmission portion (330a), increasing the volume of the second battery cell (110b) expanding force to the second expanding force transmitting portion (330b) this can be applied.
[106]
Hereinafter, when both the first battery cell (110a) and a second battery cell (110b) the volume is increased, it will be described the process for preventing the overcharge of the battery module.
[107]
If it does, the volume of the battery module of claim due to the excessive charging one battery cell (110a) and a second battery cell (110b) of the increase as described above, the first expansion force transmission portion (330a) and the second expanding force transmitting portion (330b) It can be applied to the expansive force toward the front.
[108]
Then, the first expansion force transmission portion (330a) and the second expanding force transmitting portion (330b) is gear coupled with the slide bar 320 passes the expansion force to the slide bar 320 is transmitted to the expanding force of the first bus bar (200a ) and a it can be moved in the second bus bar (the direction (c) toward the 200b). Finally, the short-circuit formed at the other end of the slide bar 320, the terminal 322 includes a first bus bar (200a) and second to second into contact with the bus bar (200b), a first bus bar (200a) and a second bus bar (200b ) a can be electrically connected.
[109]
As a result, the circuit including the short-circuit terminal 322, a first bus bar (200a) and a second bus bar (200b) to form a short circuit.
[110]
To this end, the short-circuit terminal 322 may be formed of a conductive material.
[111]
Thus, the battery module according to an embodiment of the present invention in the case where the volume increase due to the first battery cell (110a) and a second battery cell (110b), the overcharging, the short circuit part 300 includes a first battery cell ( 110a) and the second is received is the expansion force from a battery cell (110b) moves to the first bus bar (200a) and a second bus bar (200b) electrically to a first bus bar (200a) and a second bus bar (200b) by coupling, it is possible to generate a short circuit.
[112]
On the other hand, in the case where the first battery cell (110a) and a one of the volume of the second battery cell (110b) in addition to the case of increasing the volume of both, the first battery cell (110a) and a second battery cell (110b) increases even the short circuit part 300 is electrically connected to the first bus bar (200a) and a second bus bar (200b) can generate short circuit.
[113]
More specifically, the first case that only the volume of the battery cell (110a) increases, the slide bar 320 includes a first expansion force transmission portion the first bus bar (200a) and the second bus, receiving the expanding force only from (330a) It can be moved to a bar (200b).
[114]
That is, the slide bar 320 may be even increased volume only of the first battery cell (110a) passing the expanding force of the volume increase, by being moved to the first bus bar (200a) and a second bus bar (200b) a first bus bar (200a) and the second bus bar to electrically connect the (200b) can generate short circuit.
[115]
On the other hand, the second case that only the volume of the battery cell (110b) is increased, the slide bar 320, the second expanding force by receiving the expanding force from only the transmitting portion (330b), a first bus bar (200a) and a second bus bar ( It can be moved to 200b).
[116]
In other words, the slide de bar 320 is a second, even if only the volume of the battery cell (110b) is increased can be delivered to the expanding force of the volume increase, the first bus bar (200a) and a second bus bar (200b) by being moved, by electrically connecting the first bus bar (200a) and a second bus bar (200b) can generate short circuit.
[117]
Hereinafter to describe the circuit configuration of the mobile short-circuit portion of the battery module in accordance with one embodiment of the present invention.
[118]
10 is an equivalent circuit diagram before the excessive charging of the battery module in accordance with one embodiment of the present invention, Figure 11 is an equivalent circuit diagram of immediately after the overcharge of the battery module in accordance with one embodiment of the present invention short-circuit additional movement, Figure 12 is the after the overcharge of the battery module in accordance with one embodiment of the invention, an equivalent circuit after the short-circuit portion to move breaking portion breaks.
[119]
When 10 to 12, when the battery module operates in not overcharge the normal state according to the present invention, as shown in Figure 10, the first battery cell (110a) and a second battery cell (110b) this volume does not increase, the first bus bar (200a) and a second bus bar (200b) may not be electrically shorted.
[120]
However, as shown in Figure 11, the battery module according to the present invention, excessive charging the first battery cell (110a) and a second case of one or more of the volume of the battery cell (110b) is increased, the short circuit part 300 is expanding force a is received it can be moved into a first bus bar (200a) and a second bus bar (200b). Accordingly, the short-circuit terminal (322 in FIG. 8) of the short circuit part 300 includes a first bus bar (200a) and second to second into contact with the bus bar (200b), a first bus bar (200a) and a second bus bar (200b ) a may generate a short circuit by electrically connecting.
[121]
As a result, the short circuit including the short-circuit unit 300, a first bus bar (200a) and a second bus bar (200b) is formed can flow high current (I).
[122]
Then, the first bus bar (200a) with a high current (I) continuously when flowing in,, is smaller the sectional area resistance value occurs, the large breaking portion (210a) the resistance heat of a high temperature as shown in Figure 12 by breaking, it is the power supplied to the battery module from the external voltage source block can be prevented from being overcharged.
[123]
13 is a diagram showing a cross section of a battery module according to an embodiment of the invention cartridge, Figure 14 is a perspective view of the inner cartridge in the battery module according to an embodiment of the present invention.
[124]
13 when to refer to FIG. 14, the cartridge 400 includes a first battery cell (110a) and a second electrode lead (120b) of the first battery cell (110a) positioned between the battery cell (110b), it is possible to accommodate or support at least a portion of the second battery cell (110b), the second electrode leads (120b), a first bus bar (200a), a second bus bar (200b) and the short circuit part 300 of the.
[125]
More specifically, the cartridge 400 includes a face-to-face contact and can not electrically connected to the first the first electrode lead (120a) and the first bus bar (200a) of the battery cell (110a) in the lower, face-to-face contact to electrically It can support a second second electrode leads (120b) and a second bus bar (200b) of the battery cell (110b) connected at the bottom.
[126]
For this purpose, the cartridge 400 includes a second electrode leads (120b), a first bus bar (200a) and a second of the first electrode lead (120a), a second battery cell (110b) of the first battery cell (110a) the support groove 430 having a shape corresponding to the bent shape of the bus bars (200b) may be formed.
[127]
On the other hand, the cartridge 400 has a receiving space 410 of the shape corresponding to the outer shape of the outer shape and the short-circuit unit 300 of the short circuit part 300 to the inside is formed can receive the short-circuit unit 300 to the inside.
[128]
At this time, the receiving space 410 of the cartridge 400 can be formed so as to correspond to the volume in the case where the elastic member 310 of the short circuit part 300 is restored from the deformed state.
[129]
That is, may be formed corresponding to the volume-changing case of repeated deformation and restore the elastic member (310 in FIG. 7) of the receiving space 410 of the cartridge 400 includes a short-circuit part (300).
[130]
In other words, the accommodation space 410 may be formed inside the cartridge 400 in a shape corresponding to the outer shape of the short circuit part 300.
[131]
The battery module according to the present invention can be broken by exactly a first bus bar when an abnormal swelling of the battery cells increase the reliability of the battery module by interrupting the electric power supplied from an external voltage source, it is possible to prevent excessive charging of the battery modules.
[132]
On the other hand, the battery pack according to the present invention includes one or more of the above-described battery module. At this time, the battery pack may be further included in addition to a battery module, a case for accommodating this battery module, a variety of apparatus for controlling charging and discharging of the battery module, such as a BMS (Battery Management System), a current sensor, a fuse or the like. In particular, the battery pack according to an embodiment of the present invention, a battery module, each first bus bar, a second bus bar, by breaking the first bus bar when an abnormal swelling of the battery cell having a short circuit portion and a cartridge supplied from an external voltage source, by cutting off the electric power, it can be carried out for each battery module overcharge protection.
[133]
The battery module according to the present invention can be applied to vehicles, such as electric or hybrid vehicle. That is, the vehicle according to the present invention, may include a battery module according to the present invention.
[134]
The present invention described above is carried out by the present invention it to those of ordinary skill, in which so many possible changes and modifications may be made without departing from the scope of the present invention above-described example and the attached drawings in it not limited by.

Claims

[Claim 1]A first electrode electrically connected to the first lead and the bus bar of the first battery cell; A second electrode lead and the second bus bar electrically connected to the second battery cell; The first battery cell and the second battery applying the expansive force caused by one or more of the volume increase of the cell received by moving toward the first bus bar and the second bus bar to the first bus bar and the second bus bar electrically connected to to short-circuit part for generating a short circuit (Short); And the first electrode lead and said second electrode lead, the first bus bar, the second bus bar and a battery module including a cartridge for containing or supporting at least a part of the short-circuit portion.
[Claim 2]
The method of claim 1, wherein the short-circuit end portion is supported on the inner side of the cartridge, the elastic member for providing an elastic force in a direction opposite to the expansion force; Once the slide provided with a rack gear formed in contact with the other end of the elastic member provided with a shorting terminal is receiving the elastic force from the elastic member, along the surface of the other end of the bar; And engaged with the rack gear on one end and a pinion gear for supporting the other end of the slide bar and including the other end of the first battery cell and the second in contact with the battery cells, each of the one end applied expansion force transmission receiving the expanding force The battery module.
[Claim 3]
The method of claim 2, wherein the slide bar is the first battery cell and the second battery cell both cases the volume does not increase, the first battery cell and the second battery cell and spaced a short-circuit terminal only is receiving the spring force battery modules.
[Claim 4]
The method of claim 2, wherein the expansion force transfer portion moves toward the first battery cell and the second case of the battery cell at least one volume of the increase, take applying the expanding force of the first bus bar and the second bus bar, the battery module to pass the slide bar via the authorized engages the rack gear and the pinion gear to the expanding force.
[Claim 5]
The method of claim 2, wherein the slide bar is the first battery cell and the second case of the battery cell at least one volume of the increase, through the meshes the rack gear and the pinion gear receives the expansion force of the first bus bar and the battery module to move toward the second bus bar.
[Claim 6]
The method of claim 2, wherein the short-circuit terminal of the battery module for generating the first bus bar and the second short-circuit contact to a bus bar electrically connected to the first bus bar and the second bus bar.
[Claim 7]
The method of claim 2, wherein the short-circuit terminal of the battery module is formed of a conductive material.
[Claim 8]
The method of claim 1, wherein the cartridge has a receiving space of a shape corresponding to the outer portion to the inner short-circuit is formed in the battery module received in the interior parts of the short-circuit.
[Claim 9]
The method of claim 8, wherein the receiving space is the battery module is formed so as to correspond to the volume of the elastic member according to the restored state of the elastic member.
[Claim 10]
The method of claim 1, wherein the cartridge-to-face contact and electrically connected to the first electrode leads and the first bus bar and the second electrode lead, and the second bus, each of at least the supporting part, and electrically connected by face-to-face contact bar each for supporting at least a battery module part.
[Claim 11]
The method of claim 1, wherein the first bus bar and the second at least one of the bus bar of the battery module that includes a fracture to block an electrical connection, are broken and the outer case to which the short circuit occurs.
[Claim 12]
The first battery pack including a battery module according to any one of the preceding claims 11.
[Claim 13]
FAW including a battery module according to any one of the preceding claims 11.