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. 10-2017-0081350, filed on June 27, 2017, and all the contents thereof are hereby 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 invention first electrical battery cells and the first received is the expansion force caused by the volume increase of the other battery cell adjacent to the battery cells move toward the first bus bar and second bus bar and contacting the first bus bar and second bus bar by ensuring that connects to the short-circuit (Short) is generated, the breaking portion is broken bus bar 1 it is formed 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 first receiving expansion force due to the volume increase of the other battery cell adjacent to the battery cells is the first bus bar and the second bus moves toward the bar to the first bus bar and the second bus bar, by electrically connecting the short-circuit part and the first electrode lead for generating a short circuit (Short), the 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 It includes.
[19]
Preferably, the above short-circuit portion is in contact with one end of the first battery cell at the other end the slide bar, and one end and the other end each of the contact portions comprising a seat which is provided with a contact receiving applying the expanding force and, once the shorting terminal mounted on when the slide bar is in contact with the cartridge movement toward the first bus bar and the second bus bar, it is compressed by the slide bar may include a buffer member for absorbing impact.
[20]
Preferably, the slide bar is the first battery cell and the first case that the volume of the other battery cell adjacent to the battery cell is increased, applying the expanding force from the contact portion receives the first busbar and the second busbar It can be moved toward.
[21]
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.
[22]
Preferably, the shorting terminal may be formed of a conductive material.
[23]
Preferably, the first bus bar is provided along the first connection plate is electrically connected to in contact with the first electrode lead from the first connection plate toward the front of the first battery cell, an external power supply and the electrical connected to the first power supply plate and from the first power supply plate may include a second protrusion protruding from the plate toward the second bus bar.
[24]
Preferably, the second bus bar wherein the formed extended from the second connecting plate, the second connection plate is in contact with the second electrode lead electrically connected to the forward of the second battery cell, an external power supply and the electrical connected to the second power supply plate and from the second power supply plate may include a second protrusion protruding from the plate toward the first bus bar.
[25]
Preferably, the first bus bar and the second at least one of the bus bar
[26]
When said short-circuit occurs, the fracture may further include a fracture to block the electrical connection to the outside.
[27]
Preferably, the cutaway portion may be formed to have a small cross-sectional area than the average cross-sectional area of ​​the first bus bar or said second bus bar.
[28]
Preferably, the cutaway portion may be formed on at least one of the second power supply plate of the first power supply plate and the second bus bar of the first bus bar.
[29]
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.
[30]
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.
[31]
The battery pack according to the present invention may include the battery module.
[32]
Vehicles according to the present invention may include the battery module.
[33]
Effects of the Invention
[34]
According to the invention, such that between the first battery cell and the first through the expansion force caused by the volume increase of the other battery cell adjacent to the battery cell, the first bus bar and second bus bar electrically connected to, and thereby by making a short circuit occurs, , the breaking portion is broken formed on at least any one of the first bus bar and second bus bar it is possible to improve the stability of the battery module to prevent excessive charging of the battery modules.
[35]
Brief Description of the Drawings
[36]
1 is a perspective view of a battery module according to an embodiment of the present invention.
[37]
Figure 2 is an exploded perspective view of a separation module, only the case of the battery module in accordance with one embodiment of the present invention.
[38]
3 is a close-up exploded perspective view of separated first bus bar, a second bus bar and the short circuit portion of a battery module according to an embodiment of the present invention.
[39]
Figure 4 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.
[40]
5 is a view showing only the first battery cell, a second battery cell, the battery cell 3, the first bus bar and second bus bar of the battery module in accordance with one embodiment of the present invention.
[41]
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.
[42]
7 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]
8 is an equivalent circuit previous overcharge of the battery module in accordance with one embodiment of the present invention.
[44]
9 is an equivalent circuit diagram of the right after moving after excessive charging of the battery module in accordance with one embodiment of the present invention short-circuit portion.
[45]
10 is after overcharging of the battery module in accordance with one embodiment of the present invention short-circuit part moved by an equivalent circuit diagram after the breaking portion breaks.
[46]
Figure 11 is a perspective view of the inner cartridge in the battery module according to an embodiment of the present invention.
[47]
Mode for the Invention
[48]
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.
[49]
Figure 1 is one embodiment of a perspective view of a battery module according to an embodiment of the present invention, Figure 2 is an exploded, remove only the module case of the battery module, a perspective view according to one embodiment of the invention, Figure 3 is the invention a first bus bar, a second bus bar and enlarge the separation of the short circuit parts exploded perspective view of a battery module according to, Figure 4 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.
[50]
Figures 1 to 4, the battery module according to an embodiment of the present invention includes a module case (C1, C2, C3), the battery cell (110a, 110b, 110c), a bus bar (200a, 200b), the short circuit- It may comprise a 300 and the cartridge 400. the
[51]
The module case (C1, C2, C3) is to protect the battery module from the impact applied from the outside therein are the components of the battery module according to the invention, and.
[52]
More specifically, the module case (C1, C2, C3) comprises a housing (C1) for receiving a battery cell (110a, 110b, 110c), a bus bar (200a, 200b) and the short circuit portion 300 in the inner space, the housing It is from the inside of the cover (C2) and the housing (C1) covering the upper part of (C1) may be of a clamp (C3) for supporting a battery cell (110a, 110b, 110c) in the lateral direction.
[53]
Such a housing (C1) and the lid (C2) of said module housing (C1, C2, C3) can be sealed by welding.
[54]
On the other hand, the housing (C1) may be formed on the bus bar a hole (C1-1, C1-2) over the bus bars (200a, 200b) accommodated in the inner space which projects to the outside toward the front. This allows, by being a battery cell (110a, 110b, 110c) bus bars (200a, 200b) connected to the electrode leads of the protruded and exposed to the outside of the module case (C1, C2, C3), external power is the module case ( is C1, C2, electrically connected to a bus bar (200a, 200b) exposed to the outside of the C3) can be discharged, the battery cells (110a, 110b, 110c) charge.
[55]
Further, the support hole (C1-3 that the housing (C1) is an electrode lead and the bus bar (200a, 200b) of the face-to-face contact with each other in the internal space the battery cells (110a, 110b, 110c) protruding toward the left and right to the outside, C1-4) it may be formed on the left and right sides. Thereby, the electrode leads and the bus bars (200a, 200b) of the battery cell (110a, 110b, 110c) in contact with each other face-to-face may be exposed to the outside, even if separated from the ground support hole (C1-3, C1-4) is supported on the inner side of the contact state can be stably maintained.
[56]
On the other hand, the clamp (C3) is surrounding the right and left sides and bottom of the battery cell (110a, 110b, 110c) may support the battery cell (110a, 110b, 110c) in the lateral direction. Through which, in the case of increasing the volume of the clamp (C3) due to overcharge the battery cell (110a, 110b, 110c), the pressure in the right and left sides of battery cells (110a, 110b, 110c) is the volume in the front-rear direction it is possible to control the swelling so as to increase.
[57]
That is, the clamp (C3) may derive a volume increasing direction due to overcharge the battery cell (110a, 110b, 110c) in the longitudinal direction of the electrode lead is formed. Accordingly, the battery cells (110a, 110b, 110c) according to the invention may if the volume increase to the overcharge, the front and rear surfaces of the electrode leads formed expansion.
[58]
Module housing (C1, C2, C3) in accordance with the present invention as described above, if the components of battery modules are accommodated in the inner space, components can be protected, the kind is not particularly limited and a variety of cases the It may be employed in the battery module according to the invention.
[59]
Said battery cells (110a, 110b, 110c) may be provided in plural number, each of the battery cells (110a, 110b, 110c) it can be stacked side by side in the lateral direction.
[60]
Battery cells (110a, 110b, 110c) 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, 110c) may be made of silver, 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, 110c) may be a lithium secondary battery.
[61]
On the other hand, it can be classified into the battery cell (110a, 110b, 110c) according to the type of casing the pouch-shaped, cylindrical, rectangular and the like. In particular, the battery cell (110a, 110b, 110c) of the battery module in accordance with the present invention may be a pouch-type secondary battery.
[62]
The battery cell (110a, 110b, 110c) is implemented as a pouch-shaped secondary cells, too, each of the battery cells (110a, 110b, 110c) as shown in Figure 2 is located on the right side and a wide side with each other left, each there are a wide surface between the battery cell (110a, 110b, 110c) may be configured to face each other. In this case, each battery cell (110a, 110b, 110c) may be provided with, or protrudes toward the front, be projected toward the front electrode lead is formed into a bent shape (120a, 120b).
[63]
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.
[64]
On the other hand, the battery module includes a first battery cell (110a), a second battery cell (110b) and the first battery cell (110a) and a second battery cell (110b) which is located in the right-most positioned at the leftmost of the present invention It may be composed of a plurality of the third battery cell (110c) which is located between. 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. In addition, the first battery cell (110a) and a second battery cell (110b), each of the electrode leads may be formed in a protruding shape toward the front and rear.
[65]
In more detail, as shown in Figure 3, 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.
[66]
On the other hand, the first electrode lead of the first battery cell (110a) (120a) is in contact with the first bus bar (200a) will be described below and the physical, can be electrically connected. Therefore, the first electrode lead (120a) may be connected to the positive electrode and the external electric power source through a first bus bar (200a).
[67]
A second lead electrode (120b) of the battery cell (110b) is in contact with the second bus bar (200b) to be described later and the physical, it can be electrically connected. Therefore, the second electrode leads (120b) may be connected to the cathode and electrically with the external power supply through a second bus bar (200b).
[68]
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.
[69]
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).
[70]
5 is a view showing only the first battery cell, a second battery cell, the battery cell 3, the first bus bar and second bus bar of the battery module in accordance with one embodiment of the present invention.
[71]
First bus being also further reference to Figure 5, 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.
[72]
More specifically, the first bus bar (200a) may include a first connection plate (210a), a second power supply plate (220a) and the first projecting plate (230a).
[73]
A first connecting plate (210a) is formed in a plate shape, and the contact facing each other of the first lead electrode (120a) can be electrically connected.
[74]
In this case, the first connection plate (210a) may be formed and extend in the same direction as the projecting direction of the first lead electrode (120a). In other words, the first connecting plate (210a) may be formed and extend in the same direction as the bending direction of the first battery cell, the first electrode lead (120a) be extended toward the front of (110a) perpendicular to the bending.
[75]
On the other hand, the first connection plate (210a) is in physical contact is welded to the first lead electrode (120a) can be electrically connected.
[76]
In this case, the first connection plate (210a) is a first electrode lead (120a) and the first bus bar (200a) is electrically status cartridge (400 in Figure 3 will be described below in connected with the contact face of the battery cell (110a) ) retaining grooves (420 in Fig. 3) of the can may be supported part is inserted.
[77]
Also, the first connecting plate (210a) includes a first battery cell, the first electrode lead (120a) and the first bus bar (200a) has a housing (C1 in FIG. 2) on the electrically connected state face to face contact (110a) through the support hole (C1-3 in Fig. 2) may be exposed to the outside.
[78]
The first power supply plate (220a) is the other end is first connected to one end of the connection plate (210a), the can be formed to extend toward the front of the first battery cell (110a) from one end of the first connecting plate (210a) have. That is, one end of the first other terminal of the power plate (220a) is in contact perpendicularly to one end of the first connecting plate (210a), the first power supply plate (220a) can be extended toward the front of the first battery cell (110a) have.
[79]
In addition, the first power supply plate (220a) has one end be connected to the positive electrode of the external power supply and electrically.
[80]
At this time, the bus of the first power supply plate (220a) are support grooves (420 in FIG. 3) part can be supported is inserted, and the remaining part of the housing (FIG. 2 C1) in the cartridge (400 in Fig. 3) which will be described later through the bar hole (C1-1 in Fig. 2) may be exposed to the outside.
[81]
The first projecting plate (230a) may be formed to project toward the second bus bar (200b) from the first power supply plate (220a).
[82]
More specifically, the first projecting plate (230a) may be formed so as to protrude approximately perpendicular to the first power supply plate (220a) from the inner surface of the first power supply plate (220a).
[83]
Further, the first projecting plate (230a) is a part in the supporting groove (420 in FIG. 3) of the cartridge (400 in Fig. 3) described later can be supported is inserted.
[84]
On the other hand, the first bus bar (200a) may further comprise a cutaway portion (240a).
[85]
The breakable portion (240a) may be formed on, the first power supply plate (220a) as shown in Fig. More particularly, the breakable portion (240a) may be formed at a position closer to the first power supply plate first battery cell (110a) than the first projecting plate (230a) from (220a).
[86]
On the other hand, the breakable portion (240a) may be formed to have a small cross-sectional area than the cross-sectional area of ​​the first connecting plate (210a), the first power supply plate (220a) and the first projecting plate (230a). In other words, the breaking portion (240a) formed in the first bus bar (200a) may be formed to have a small cross-sectional area than the average cross-sectional area of ​​the first bus bar (200a).
[87]
This, the breakable portion (240a) has a first connecting plate (210a), the first being formed to have a small cross-sectional area than the cross sectional area of ​​the power plate (220a) and the first projecting plate (230a), when the current flows can increase the resistance value have.
[88]
Accordingly, the first bus bar (200a) and a second bus bar (200b) is electrically connected to the first bus bar (200a), a second bus bar (200b), and when a short circuit is formed between the external power source, breaking section (240a) it may be broken by the resistance heat of a high temperature caused by excess current flow in the first bus bar (200a).
[89]
A second first-electrode lead of the 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 ( by 120a) it is bent in a substantially right angle toward the direction opposite the bending direction may be in contact face-to-face with the second bus bar (200b).
[90]
More specifically, the second bus bar (200b) may include a second connecting plate (210b), the second power supply plate (220b) and the second projecting plate (230b).
[91]
A second connecting plate (210b) is formed in a plate shape, and face each other with the second electrode lead (120b) contact may be electrically connected.
[92]
At this time, the second connecting plate (210b) may be formed and extend in the same direction as the protruding direction of the second electrode leads (120b). In other words, the second connecting plate (210b) may be formed and extend in the same direction as the bending direction of the second battery cell, the second electrode lead be extended toward the front of the (110b) perpendicular to the bend (120b).
[93]
On the other hand, the second connecting plate (210b) is in physical contact is welded to the second electrode leads (120b) can be electrically connected.
[94]
At this time, the second connecting plate (210b) is a second electrode leads (120b) and a second bus bar (200b) is electrically status cartridge (400 in Figure 3 will be described below in connected with the contact face of the battery cell (110b) ) retaining grooves (420 in Fig. 3) of the can may be supported part is inserted.
[95]
In addition, the second connecting plate (210b) is a second electrode leads (120b) and a second bus bar (200b) comprises a housing (C1 in FIG. 2) in electrically connected state by face-to-face contact of the battery cell (110b) through the support hole (C1-4 FIG. 2) may be exposed to the outside.
[96]
The second power supply plate (220b) has the other end of the second connection plate one end and is connected to the (210b), the second connecting plate (210b) end may be from the formation extends toward the front of the second battery cell (110b) of have. That is, the second other end of the power plate (220b) is in contact perpendicularly to one end of the second connecting plate (210b), the second end of the power plate (220b) can be extended toward the front of the second battery cell (110b) have.
[97]
Further, the second power supply plate (220b) has one end be connected to the cathode and electrically with the external power supply.
[98]
At this time, the bus of the second power supply plate (220b) are support grooves (420 in FIG. 3) part can be supported is inserted, and the remaining part of the housing (in FIG. 2, C1) in the cartridge (400 in Fig. 3) which will be described later through the bar hole (C1-2 in Fig. 2) may be exposed to the outside.
[99]
The second projecting plate (230b) may be formed to project toward the second bus bar (200b) from the second power supply plate (220b).
[100]
More specifically, the second projecting plate (230b) may be formed so as to protrude approximately perpendicular to the second power supply plate (220b) from the inner surface of the second power supply plate (220b).
[101]
In addition, the second projecting plate (230b) has a part in the retaining grooves (420 in Fig. 3) of the cartridge (400 in Fig. 3) described later can be supported is inserted.
[102]
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.
[103]
With further reference to Figure 6, the battery module according to the invention as shown in Figure 6 when the first bus bar (200a) and a second bus bar (200b) is electrically connected to a short circuit occurs, the first battery cell (110a) has a first breaking the breakable portion (240a) of the electrode leads (120a) of the first bus bar (200a) for electrically connecting between the external power source being charged may be stopped.
[104]
In other words, the first bus bar (200a) and a second bus bar (200b) is electrically connected when a short circuit occurs, the first claim attached to the first electrode lead (120a) of the battery cell (110a) first connection plate ( 210a) and a breaking the breakable portion (240a) connecting the first power supply plate (220a) connected to the external power source being charged may be stopped.
[105]
Here, the first bus bar (200a) and a second bus bar (200b) electrically connected to the can by a short-circuit unit 300 to be described later moves toward the first bus bar (200a) and a second bus bar (200b), the short circuit- a short-circuit terminal 350 is provided at the 300 are in contact at the same time as a first bus bar (200a) and a second bus bar (200b) may be caused by being electrically connected. Further, the short circuit part 300 may receive an applied expansion force caused by the increase in volume due to the excessive charging the first battery cell (110a) to move toward the first bus bar (200a) and a second bus bar (200b). At this time, the short circuit part 300 includes a first battery cell (110a) other than the first if the volume of the battery cell (110a), the other battery cells (110c) adjacent to the increase, the first battery cell (110a) and the adjacent other battery It can be applied to the expansion force from the cells (110c).
[106]
In the following, the first one only describes the case that the volume of the battery cell (110a) increases, the first battery cell (110a) as well as to the volume of the first battery cell (110a) other battery cells (110c) adjacent to the increase Again, it is noted that the expansion force in the short-circuit unit 300 can be applied.
[107]
The battery module according to the present invention is the first to be applied to the expansion force caused by the volume increase due to the excessive charging short-circuit part (300 in Fig. 3) the first bus bar (200a) and the second bus of the battery module (110a), bar (Fig. a 3 200b) 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.
[108]
On the other hand, the breakable portion (240a) of the battery module in accordance with one embodiment of the present invention has been described as being formed in the first bus bar (200a), fracture in accordance with another embodiment of the present invention unit can be formed bar, a second bus and, breaking according to still another embodiment of the present invention may be formed on both the first bus bar and second bus bar.
[109]
Moreover, the breakable portion (240a), but, may be compared to the adjacent region form a narrower width, as described above, can also not limited to this, and if composed 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 (240a) of the present invention.
[110]
Hereinafter to be described in detail in the above-mentioned short-circuit part (300).
[111]
Short-circuit part 300 is a first bus bar (200a) received is the expansion force due to the volume increase by moving toward the first bus bar (200a) and a second bus bar (200b) of the battery cell (110a) and the 2 by coming into contact with the bus bar (200b), it may cause a short circuit.
[112]
To this end, the short-circuit unit 300 may include a slide bar 320, and a buffer member (310).
[113]
Slide bar 310 may be moved toward the first battery cell (110a) and the other end is in contact with receiving the expanding force is applied to the first bus bar (200a) and a second bus bar (200b). To this end, the slide bar 310 may include a contact portion 321 of the semi-cylindrical shape at the other end. Contact portion 321 is a surface that is in contact with the first battery cell (110a) to receive applying a constant expansion force to occur in a plurality of directions from the first battery cell (110a) may be formed as a curved surface.
[114]
On the other hand, the slide bar 310 may be provided at one end a first bus bar (200a) and a second bus bar (200b) mounted to be short-circuit terminal 322 is seated in contact with the parts.
[115]
Seating portion by surface contact and is formed in a plate-shaped short-circuit terminal 322 is formed in a plate shape, the shorting terminal 322 is first in contact with the first bus bar (200a) and a second bus bar (200b) short-circuit terminal 322, the support can be in a stable manner.
[116]
When the buffer member 310 is one end and the other end is moved towards the respective contact portions 321 and the cartridge is in contact with the 400 slide bar 320, a first bus bar (200a) and a second bus bar (200b), by being compressed by the slide bar 320 may absorb shock.
[117]
Further, by preventing it to move towards the buffer member 310 contacts 321 and the cartridge 400 is disposed between the short circuit part 300, a first bus bar (200a) and a second bus bar (200b), not the overcharge does not occur in the battery modules due to the volume increase of the first battery cell (110a) when the expanding force is not applied, the first bus bar (200a) and said preventing unwanted short-circuit the second bus bar (200b) occurs can do.
[118]
This, the buffer member 310 so long as it can be can be formed of a sponge structure or a spring member, to absorb the shock is not limited to their kinds.
[119]
7 is a view showing the top surface after the increasing volume of the battery module in accordance with one embodiment of the present invention.
[120]
With further reference to Figure 7, when the battery module is overcharged can be the volume of the first battery cell (110a) increases. In this case, the first contact portion 321 of the slide bar 320 when the volume of the battery cell (110a) increases may be applied to the expansion force from a first battery cell (110a).
[121]
Then, the slide bar 320 may be moved in a direction (a) towards the first bus bar (200a) and a second bus bar (200b) due to the expansion force applied to the contact portion 321. The Finally, the short-circuit terminal 322 is seated on the seating portion of the slide bar 320 includes a first bus bar (200a) and a second bus bar (200b) in contact with the first bus bar (200a) and a second bus bar a (200b) can be electrically connected.
[122]
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.
[123]
To this end, the short-circuit terminal 322 may be formed of a conductive material.
[124]
Thus, the battery module according to an embodiment of the present invention in the case where the volume of the first battery cell (110a) increases due to the overcharge, short-circuit part 300 is received is the expansion force from a first battery cell (110a) is moved to the first bus bar (200a) and a second bus bar (200b) connected by a first bus bar (200a) and a second bus bar (200b) by electrically, it is possible to generate a short circuit.
[125]
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.
[126]
8 is an equivalent circuit diagram before the excessive charging of the battery module in accordance with one embodiment of the present invention, Figure 9 is an equivalent circuit diagram immediately after the short-circuit portion moving after excessive charging of the battery module in accordance with one embodiment of the present invention, Figure 10 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.
[127]
When 8 to refer to FIG. 10, not increase the volume of the battery module if this is not the overcharge operation to a normal state, the plurality of battery cells (110a, 110b, 110c), as shown in FIG. 8 according to the invention Since the first bus bar (200a) and a second bus bar (200b) may not be electrically shorted.
[128]
However, it applied from an, in the case of the battery module according to the invention an overcharge increases the volume of the first battery cell (110a), the short circuit part 300 includes a first battery cell (110a), the expansion force as shown in FIG. 9 receive may move into the first bus bar (200a) and a second bus bar (200b). Accordingly, the short-circuit terminal of the short circuit part 300 includes a first bus bar (200a) and a second bus bar (200b) contacts to connect the first bus bar (200a) and a second bus bar (200b) to electrically and by It can cause a short circuit.
[129]
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).
[130]
Then, the first bus bar (200a) with a high current (I) continuously when flowing, is formed smaller cross-sectional area the resistance is large breaking unit (240a) generates the resistance heat of a high temperature as shown in Figure 10 breaking, whereby the power supplied to the battery module from the external power supply is cut off can be prevented from being overcharged.
[131]
Figure 11 is a perspective view of the inner cartridge in the battery module according to an embodiment of the present invention.
[132]
11, the cartridge 400 includes a first second electrode leads (120b), a first bus bar (200a) of the second electrode leads (120b), a second battery cell (110b) of the battery cell (110a) , it is possible to accommodate or support at least a portion of the second bus bar (200b) and the short circuit part 300.
[133]
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.
[134]
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 420 having a shape corresponding to the bent shape of the bus bars (200b) may be formed.
[135]
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.
[136]
At this time, the receiving space 410 of the cartridge 400 can be formed so as to correspond to the movement of the short circuit part 300.
[137]
In other words, the accommodation space 410 is short-circuit part 300 of the cartridge 400 can be applied to the received position and the expansion force before receiving the expanding force is formed corresponding to the position after the movement.
[138]
In addition, the receiving space 410 may be formed inside the cartridge 400 in a shape corresponding to the outer shape of the short circuit part 300.
[139]
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.
[140]
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.
[141]
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.
[142]
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 first receiving expansion force due to the volume increase of the other battery cell adjacent to the battery cells is the first bus bar and the second bus moves toward the bar to the first bus bar and the second bus bar, by electrically connecting the short-circuit portion 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 portion is in contact with one end of the first battery cell at the other end to a slide bar having a contact portion comprising a receiving applying the expanding force and, once the seat is secured to the short-circuit terminal; And one end and the other ends are respectively in contact with the contact portion and said cartridge when said slide bar is moved toward the first bus bar and the second bus bars, a battery module that is compressed by the bar of the slide comprises a buffer member for absorbing impact .
[Claim 3]
The method of claim 2, wherein the slide bar is the first battery cell, and if the volume of the other battery cell adjacent to the first battery cell is increased, is receiving the expanding force of the first bus bar and the first through the contact portion 2, the battery module to move toward the bus bar.
[Claim 4]
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 5]
The method of claim 2, wherein the short-circuit terminal of the battery module is formed of a conductive material.
[Claim 6]
The method of claim 1, wherein the first bus bar is connected to a first electrically connected to the contact with the first electrode lead plate; From the first connection plate is extended toward the front of the first battery cell, the second projecting plate protruding toward the second bus bar from the first power supply plate and said first power supply plate to be connected to an external power source and the electrical the battery module having.
[Claim 7]
The method of claim 6, wherein the second bus bar to the second connection plate is electrically connected to in contact with the second electrode lead; From the second connection plate is extended toward the front of the second battery cell, the second projecting plate protruding toward the first bus bar from the second power supply plate and said second power supply plate to be connected to an external power source and the electrical the battery module having.
[Claim 8]
The method of claim 7 wherein the first bus bar and the second bus bar is at least one of a battery module further comprising a rupture of the case at which the short circuit occurs, the breaking off the electrical connection with the outside.
[Claim 9]
The method of claim 8, wherein the breaking unit battery modules are formed to have a small cross-sectional area than the average cross-sectional area of ​​the first bus bar or said second bus bar.
[Claim 10]
Claim 8 wherein, said breaking unit battery modules are formed in at least one of the second plate of the first power supply plate and the first bus bar of the first bus bar on.
[Claim 11]
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 12]
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 13]
The first battery pack including a battery module according to any one of the preceding claims 12.
[Claim 14]
FAW including a battery module according to any one of the preceding claims 12.