Embodiment
Present general is in detail with reference to each embodiment, and the example of these embodiments is described in the accompanying drawings.
Battery pack is formed by vertical and/or horizontal stacking multiple battery module according to an embodiment of the invention.Each battery module is formed by vertical and/or horizontal stacking multiple secondary cell.When without any other support, battery module can due to the weight of multiple secondary cell deflection.In addition, battery module can vibrate because of this deflection.
First, battery pack 300 will be described.Battery pack 300 can comprise multiple battery module 1.Each in battery module 1 is by arranging multiple secondary cell 10 and being electrically connected to each other by secondary cell 10 and being formed along predetermined direction.Each in secondary cell 10 can be lithium secondary battery.Such as, each battery module 1 can comprise 12 secondary cells 10, and battery pack 300 can comprise eight battery modules 1 being stacked into four layers.But the quantity of secondary cell 10 and battery module 1 is not limited thereto, it is also possible that those of ordinary skill in the art can understand other structure various.When multiple battery module 1 is stacked to form battery pack 300, battery module 1 is interconnected, to increase the structural stability of battery pack 300.
Therefore, now with reference to Fig. 1 to Fig. 4, battery pack 300 is described, the coherent gusset plate 60,160 and 260 of structure between this battery pack 300 comprises for increasing battery module 1.
Fig. 1 is that wherein the description of battery module 1 is applicable to battery module 100 and 200 according to an embodiment of the invention by the schematic partial, exploded perspective view of the battery pack 300 of stack of cells module 1, battery module 100 and battery module 200 formation.Fig. 2 is the perspective schematic view of the battery pack 300 of the Fig. 1 comprising the battery module 1,100 and 200 be attached to each other.Fig. 3 is the partial, exploded perspective view of battery module 1 according to an embodiment of the invention.Fig. 4 is the front schematic view of the battery module 1,100 and 200 of Fig. 2.
Battery pack 300 is formed by stack of cells module 1,100 and 200.With reference to Fig. 3, battery module 1 comprises multiple secondary cell 10 and holds the casing assembly of multiple secondary cell 10.In this embodiment, casing assembly can comprise top board 20, base plate 30, side plate 40 and end plate 50.
With reference to an exemplary secondary cell of the secondary cell 10 in battery module 1, secondary cell 10 comprises electrode assemblie, housing 11 and electrode terminal 12.Electrode assemblie comprises negative electrode, dividing plate and positive electrode, and can be convoluted or stacked assembly.Housing 11 hold electrodes assembly.Electrode terminal 12 can stretch out from housing 11 and is electrically connected with external equipment by secondary cell 10.Housing 11 can comprise exhaust portion 13.Secondary cell 10 can be perforated, to break under predetermined internal pressure.Therefore, exhaust portion 13 can be formed relatively fragile, and the gas produced in housing 11 is discharged by the exhaust portion 13 of punching.Cover plate can connect with the opening of housing 11.Cover plate can be thin plate, and can comprise electrolysis liquid and pass through and the electrolyte entrance be injected into.After electrolyte is injected into by electrolyte entrance, electrolyte entrance can by seal cap sealing.
(battery module 1 of Fig. 3) secondary cell 10 can be arranged to along predetermined direction mutually faced by.Secondary cell 10 can be electrically connected in combination by parallel connection, series connection or parallel connection and serial connection.In order in parallel or be connected in series secondary cell 10, the electrode terminal 12 of secondary cell 10 alternately can be arranged according to the positive-negative polarity of electrode terminal.The electrode terminal 12 of secondary cell 10 is connected to each other by busbar 14.
As depicted in fig. 1, secondary cell 10 can be roughly quadrangle secondary cell.Such as, but the present invention is not limited thereto, secondary cell 10 can be the battery unit of any kind, circular secondary cell or bag type secondary battery.Required charging and discharging ability and the determining when syndeton of stacking secondary cell 10 and quantity can consider design battery pack 300.
Referring again to a secondary cell 10 of battery module 1, the electrode assemblie that can comprise the secondary cell 10 of lithium expands due to charge or discharge or shrinks.The expansion of electrode assemblie or be contracted on housing 11 and apply physical force, therefore housing 11 expands according to the expansion of electrode assemblie or contraction or shrinks.The change of housing 11 can be permanent by the expansion that repeats and contraction, and expands and increase impedance, thus reduces the efficiency of secondary cell 10.Therefore, for battery module 1, a pair end plate 50 of battery module 1 can be arranged along predetermined direction, to be separately positioned on the opposed end place of the secondary cell 10 be electrically connected to each other.Side plate 40 is connected to the sidepiece of end plate 50, to press position and fixing secondary cell 10, thus make along the length direction of secondary cell 10 expansion or shrink can be prevented from or significantly reduce.
Top board 20 is arranged on multiple secondary cell 10, and is connected to the top of end plate 50.The opening 20a be formed in top board 20 corresponds to the exhaust portion 13 of secondary cell 10.Top board 20 can comprise top board sweep 20b, and top board sweep 20b is formed on two longitudinal sides of top board 20 as follows, and namely top board sweep 20b protrudes upward away from battery module 1 and makes top board 20 in roughly " U " shape.Each being formed in the opening 20a in top board 20 can comprise the sealing ring O between top board 20 and corresponding exhaust portion 13, and make when gas is from one of them discharge of exhaust portion 13, gas does not affect the secondary cell be adjacent.Sealing ring O can be O shape ring.Groove 50a is formed in the central upper portion part of end plate 50, to receive top board 20.The opening 20a of top board 20 can be set to closely adjacent secondary cell 10.
With reference to battery module 1, base plate 30 is positioned at secondary cell 10 below to support the weight of multiple secondary cell 10, and is connected to the bottom of end plate 50.In order to receive the weight of secondary cell 10, base plate 30 can comprise base plate sweep 30a.Base plate sweep 30a can be formed in two longitudinal sides of base plate 30 as follows, and namely base plate sweep 30a stretches out downwards away from battery module.
Battery module 1 is coupled to adjacent battery module by end plate 50 and is supported by this adjacent battery module, and therefore battery pack 300 is formed by vertical and/or horizontal stacking such as battery module 1,100 and 200.
Battery module 1 structurally can be connected to another battery module by gusset plate 60.Gusset plate 60 can have various shape, such as, for the rectangular shape around battery module 1, as depicted in figure 3.The electrode terminal 12 of the secondary cell 10 of battery module 1 is covered by electrode terminal lid 15, and make gusset plate 60 non-contact electrode terminal 12 and cause short circuit, namely electrode terminal lid 15 is by electrode terminal and at least one gusset plate electric insulation.In figure 3, gusset plate 60 is by the support cells module 1 around top board 20, side plate 40 and base plate 30.Be included in gusset plate 60 in battery module 1 and adjacent battery module 100 with 200 gusset plate 160 be connected with 260, to keep the structure of stacking battery module 1,100 and 200.In Fig. 1 to Fig. 3, battery module 1,100 and 200 comprises gusset plate 60,160 and 260 respectively.But the quantity that can be used in the gusset plate 60,160 and 260 in each of battery module 1,100 and 200 is respectively not limited to described, and the gusset plate 60,160 and 260 of varying number can be set.
Now with reference to Fig. 1, Fig. 2 and Fig. 4, gusset plate 60,160 and 260 is described.Battery pack 300 is formed by stack of cells module 1,100 and 200.The stackable quantity of battery module 1,100 and 200 is not limited to described.But for convenience of description, in FIG, battery module 1,100 and 200 is stacked as three-decker.With reference to Fig. 1, Fig. 2 and Fig. 4, the battery module (the second battery module 100) be arranged on below battery module 1 is similar to battery module 1 substantially.The battery module be arranged on above battery module 1 can be the 3rd battery module 200.In order to illustrate battery module 1, position relationship between 100 and 200, each battery module can be hereinafter referred to as the first battery module 1, second battery module 100 and the 3rd battery module 200, but first, second, and third battery module 1,100 with 200 parts can be identical.The gusset plate 60 of the first battery module 1 can comprise connector (or multiple connector) 60a, to be easily connected to adjacent with the first battery module 1 second and the 3rd gusset plate 160 and 260 of battery module 100 and 200.In one embodiment, each in gusset plate 60,160 and 260 has at least one connector extended from it.Each in connector has threaded portion.Therefore, second and the 3rd the gusset plate 160 and 260 adjacent with the gusset plate 60 of the first battery module 1 of battery module 100 and 200 by connector 60a, connector 160a and connector 260a via the first connection bracket (or connection bracket) 70 and 170 by the gusset plate 60 of spiral marking connection to the first battery module 1.Each in first connection bracket 70 and 170 has multiple opening, and each in multiple opening is configured to accept corresponding in connector 60a, 160a and 260a.Connector 60a, 160a and 260a and the first connection bracket 70 and 170 can spiral marking connections mutually.But gusset plate 60, connection between 160 and 260 are not limited to spiral marking connection, can use any connecting method in the various connecting methods such as such as welding.Like this, second battery module 100 adjacent with the first battery module 1 and the 3rd battery module 200 are coupled by the first connection bracket 70 and 170, and therefore the resistance to overturning of battery pack 300 can increase.In addition, gusset plate 60,160 and 260 is not only connected to base plate 30, base plate 130 and base plate 230 on structural, and is connected to top board 20, top board 120 and top board 220 and side plate 40, side plate 140 and side plate 240.Therefore, gusset plate 60,160 and 260 disperses the load of secondary cell 10,110 and 210 to prevent battery module 1,100 and 200 deflection on structural.
Top board sweep 20b, 120b, 220b is or/and base plate sweep 30a, 130a and 230a of base plate 30,130 and 230 can be formed to have the height less than predetermined value.With reference to Fig. 4, when top board 20,120 and top board sweep 20b, 120b, 220b and the base plate 30,130 of 220 and base plate sweep 30a, 130a of 230 and 230a mutually in the face of and when contacting, gusset plate 60,160 and 260 is difficult to be inserted into above or below base plate 30,130 and 230 of top board 20,120 and 220.Therefore, top board sweep 20b, 120b, 220b of top board 20,120 and 220 are formed to have the height less than predetermined value, and gusset plate 60,160 and 260 can be positioned in above top board 20,120 and 220.In addition, base plate sweep 30a, 130a and 230a of base plate 30,130 and 230 are formed to have the height less than predetermined value, and gusset plate 60,160 and 260 can be positioned in below base plate 30,130 and 230.In the case, both top board sweep 20b, 120b, 220b or base plate sweep 30a, 130a and 230a or top board sweep 20b, 120b, 220b and base plate sweep 30a, 130a and 230a can be formed to have the height less than predetermined value.
In the case, gusset plate 60 does not need the whole circumference around battery module 1, namely, do not need as shown in Figure 1 to Figure 4 describe like that around the battery module 1 comprising top board 20, base plate 30 and side plate 40.For example, referring to Fig. 5 and Fig. 6, gusset plate 60 can be formed through top board 20 above and side plate 40 is outside and between secondary cell 10 and base plate 30.
Fig. 5 is the partial, exploded perspective view of battery module 1 ' according to another embodiment of the present invention.Fig. 6 is by the front schematic view by stacking for the battery module 1 ' of Fig. 5 battery pack 400 repeatedly formed.Gusset plate 60 ' can be arranged between the secondary cell 10 of base plate 30 and battery module 1 '.Like this, when gusset plate 60 ' is arranged between base plate 30 and secondary cell 10, gusset plate 60 ' does not need to be formed through below base plate 30.Although attached not shown, gusset plate 60 ' can through top board 20 and secondary cell 10 and between base plate 30 and secondary cell 10.When gusset plate 60 ' is located as mentioned above, the connection between the base plate 30 of the first battery module 1 ' and the top board 120 of the second battery module 100 can not be hindered.Therefore, gusset plate 60 ' is not limited to be oriented the whole circumference around top board 20, base plate 30 and side plate 40, and can be arranged in top board 20, base plate 30 and side plate 40 any one within.
In addition, gusset plate 60,160 and 260 can use various connecting method to interconnect.For example, referring to Fig. 7 or Fig. 8, the gusset plate 60,160 and 260 be separately positioned in battery module 1,100 and 200 can be coupled to connecting plate C, to keep each structure of battery module 1,100 and 200.Connecting plate C is formed by integral type plate.Therefore, with when use multiple first connection bracket 70 with 170 time compare, when use single connecting plate C time, the structural stability of battery pack can increase.Gusset plate 60,160 and 260 and connecting plate C are coupled by the spiral marking connection between connector 60a, 160a and 260a of gusset plate 60,160 and 260 and connecting plate C, or are coupled with welding between connecting plate C by gusset plate 60,160 and 260.
In the case, in order to be beneficial to the connection between gusset plate 60,160 and 260 and connecting plate C, the parts of battery module 1,100 and 200 can comprise the groove for minimizing the space needed for gusset plate 60,160 and 260, and this is described with reference to Fig. 9 or Figure 10.
Fig. 9 is battery module 1 according to another embodiment of the present invention " decomposition diagram.Figure 10 is for being wherein formed with the perspective schematic view of the side plate 40 ' of side channel 40 ' g according to an embodiment of the invention.
With reference to Fig. 9, upper groove 20 ' g can be formed in top board 20 ' corresponding with gusset plate 60.Gusset plate 60 is prevented from mobile due to the upper groove 20 ' g be formed in top board 20 ', and enters in upper groove 20 ' g according to the degree of depth of upper groove 20 ' g, and the space therefore needed for gusset plate 60 can be reduced.Alternately, gusset plate 60 is prevented from mobile by the lower groove 30 ' g be formed in base plate 30 ', and enters in lower groove 30 ' g, and the space therefore needed for gusset plate 60 can be reduced.In the case, groove can be formed in top board 20 ' and base plate 30 ' one of at least in, but the position of groove is not limited thereto.For example, referring to Figure 10, side channel 40 ' g can be positioned on side plate 40 '.In the case, gusset plate 60 enters in side channel 40 ' g according to the degree of depth of side channel 40 ' g, and the space therefore needed for gusset plate 60 can be reduced.Gusset plate 60 by with one of at least connecting and be prevented from mobile in upper groove 20 ' g, lower groove 30 ' g and side channel 40 ' g, the space therefore needed for gusset plate 60 is minimized, and makes gusset plate 60 not hinder the Degree of Structure Freedom of other parts.
The stacking method of battery module is not limited thereto, and can use various method.For example, referring to Figure 11 and Figure 12, battery module 1,100,200,1001,1100 and 1200 can be stacked as multirow.In addition, adjacent gusset plate 60,160 and 260 and gusset plate 1060,1160 and 1260 can interconnect.
Figure 11 is the perspective schematic view of arranging repeatedly to become the battery pack of Fig. 1 of multirow.Figure 12 is the front schematic view of the battery pack of Figure 11.
Each in the gusset plate 60,160,260,1060,1160 and 1260 of battery module 1,100,200,1001,1100 and 1200 by the first connection bracket 70,170 and 270 and the first connection bracket 1070,1170 and 1270 by spiral marking connection to adjacent gusset plate.
Hereinafter, for convenience of description, each battery module will be called as the first battery module 1, second battery module 100, the 3rd battery module 200, the 4th battery module 1001, the 5th battery module 1100 and the 6th battery module 1200.The center that first connector 60a of the first battery module 1 and the second connector 60b can not be oriented based on end plate 50 is mutually symmetrical.Because the first connector 60a and the second connector 60b is not oriented about being mutually symmetrical, therefore when the first battery module 1 is positioned as adjacent with the 4th battery module 1001, connector does not hinder each other, thus minimizes required volume.Namely, be oriented about (being namely not collinear with each other) asymmetrical relative to one another with reference to Figure 12, the second connector 60b of the first battery module 1 and the first connector 1060a of the 4th battery module 1001.Therefore, the second connector 60b and the first connector 1060a does not hinder mutually, and thus the first battery module 1 and the 4th battery module 1001 can be positioned as adjacent one another are.
Gusset plate 60,160,260,1060,1160 and 1260 can not only vertically but also laterally be connect.Such as, the 6th battery module 1200 and the 3rd battery module 200 adjacent one another are, and to connect each other by the first connection bracket 270.The gusset plate 260 and 1260 be separately positioned in the topmost of the 3rd and the 6th battery module 200 and 1200 can comprise the 3rd connector 260c and 1260c respectively.Lay respectively at second and the 5th battery module 100 and 1100 foot in gusset plate 160 and 1160 can connect each other.Such as, the 3rd connector 1160c being formed in the 3rd connector 160c in the second battery module 100 and be formed in the 5th battery module 1100 is by the first connection bracket 1170 mechanical connection each other.
Like this, gusset plate 60,160,260,1060,1160 and 1260 can not only vertically be interconnected, and mechanical type horizontal is attached to adjacent gusset plate.Connecting method is not limited to the spiral marking connection that Figure 11 or Figure 12 describes.Such as, gusset plate 60,160,260,1060,1160 and 1260 interconnects by welding.In addition, connecting method is not limited by the first connection bracket 70,170,270,1070,1170 and 1270 connection.Such as, as Fig. 7 or Fig. 8 describe, interconnected by integral type connecting plate C by the battery module 1,100,200,1001,1100 and 1200 of vertical orientation, and be coupled via welding by connecting plate C.
Although attached not shown, multiple battery module 1,100,200,1001,1100 and 1200 around multiple battery module 1,100,200,1001,1100 and 1200, and can interconnect by the method for spiral marking connection by single connecting plate C.
The battery pack 300 comprising battery module 1,200 and 300 can be used in motor vehicle.If the battery pack 300 comprising secondary cell 10 is owing to expanding or other reason and discharge of noxious gases, then this pernicious gas is discharged by burst at short notice.When pernicious gas flows in vehicle, this gases affect human body.In the case, battery pack 300 can be accommodated in seal casinghousing, and sealing housing can be connected by outside.In order to avoid this risk, battery pack 300 can have for reducing the structure vibrated.In battery pack 300 according to an embodiment of the invention, in gusset plate 60 support cells module 1, produce the part of deflection, thus reduce deflection and the vibration of battery module 1.
Referring now to Figure 13, it illustrates according to another embodiment of the present invention, and battery pack 700 comprises battery module 1,100 and 200 as above.Further, battery pack 700 comprises reinforcement assembly, and this reinforcement assembly comprises gusset plate 760, and this gusset plate 760 extends around the whole circumference of whole battery pack 700, instead of only extends around the circumference of battery module 1,100 and 200.The structure of gusset plate 760 and shape can with the structure of the gusset plate in previous embodiment and shape same or similar.
Referring now to Figure 14, it illustrates according to another embodiment of the present invention, and battery pack 800 comprises battery module 1,100 and 200 as above.In addition, battery pack 800 comprises the connection bracket 71,171 of the side plate 40,140,240 being directly attached to battery module 1,100 and 200.In one embodiment, each connection bracket 71,171 is connected to two side plates in side plate 40,140,240, and each side plate in namely adjacent battery module 1,100,200, to be bound up battery module.Connection bracket 71,171 can such as by welding or being coupled to side plate 40,140,240 by securing members such as such as nuts and bolts at 71a, 171a place, coupling part.
Referring now to Figure 15, it illustrates according to another embodiment of the present invention, and battery pack 900 comprises battery module 1,100 and 200 as above.Battery pack 900 comprises the gusset plate 62,162 and 262 being attached to single side plate 40,140,240 and the connection bracket 72,172 be directly attached with the gusset plate on the side plate 40,140,240 of adjacent battery modules 1,100 and 200 further.Connection bracket 72,172 can such as by welding or being coupled to gusset plate 62,162 and 262 by securing members such as such as nuts and bolts at 72a, 172a place, coupling part.
According to the present invention, battery pack is passed through vertically or transverse direction is stacking comprises the battery module of multiple secondary cell separately and is formed, thus reduces deflection and the vibration of battery module.
It is only descriptive for it should be understood that exemplary embodiment described herein should be regarded as, and is not used in the object of restriction.Feature in each example or the description of aspect should typically be regarded as can be used for other the similar feature in other embodiment or aspect.