CN211629179U - Battery pack and energy storage device - Google Patents

Abstract

The utility model provides a battery package and energy memory, the battery package includes: a housing defining a receiving cavity; the battery cores are arranged in the accommodating cavity and form a multi-row battery core assembly; the separator is positioned between the two adjacent rows of the electric core assemblies so as to separate the explosion-proof valve opening of the electric core in the electric core assembly from the adjacent electric core assembly. From this, through setting up the separator, can prevent to spout adjacent electric core subassembly from explosion-proof valve opening spun high temperature material on, can avoid electric core to take place thermal runaway to can prevent that the battery package from exploding, catching fire, and then can reduce the safety in utilization of battery package.

Description

Battery pack and energy storage device

Technical Field

The utility model relates to a battery technology field, in particular to battery package and have energy memory of this battery package.

Background

Among the correlation technique, be provided with a plurality of electric cores in the current battery package, the anti-riot valve opening of electric core is just right with adjacent electric core, takes place when unusual at electric core, on the opposite electric core of anti-riot valve opening can directly be spouted to anti-riot valve opening from the anti-riot valve opening spun high temperature material of electric core, can make electric core take place the thermal runaway to lead to the battery package to explode easily, catch fire, and then reduce the safety in utilization of battery package.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a battery package can solve the problem that electric core takes place the thermal runaway, also can solve the low problem of service safety of battery package.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

a battery pack includes: a housing defining a receiving cavity; the battery cores are arranged in the accommodating cavity and form a multi-row battery core assembly; the separator is positioned between the two adjacent rows of the electric core assemblies so as to separate the explosion-proof valve opening of the electric core in the electric core assembly from the adjacent electric core assembly.

In some examples of the present invention, an upper end height of the separator is higher than or equal to a height of the explosion-proof valve opening.

In some examples of the invention, a side of the separator opposite the explosion-proof valve opening is provided with a thermally insulating layer.

In some examples of the invention, the separator extends along a length direction of the cell assembly.

In some examples of the invention, the separator is spaced apart from the adjacent cell assembly.

In some examples of the invention, the separator comprises: the spacer plate is arranged on the upper surface of the connecting plate, the spacer plate is positioned between two adjacent rows of the electric core assemblies, and the connecting plate is connected with the two adjacent rows of the electric core assemblies.

In some examples of the invention, the separator comprises: the first sub-interval plate and the second sub-interval plate are connected and positioned between two adjacent rows of the electric core assemblies.

In some examples of the present invention, the lower end of the first sub-partition has a first sub-connecting plate extending away from the second sub-partition, the first sub-connecting plate being connected to the adjacent cell assembly; the lower end of the second sub-interval plate is provided with a second sub-connecting plate extending away from the first sub-interval plate, and the second sub-connecting plate is connected with the adjacent electric core assembly.

In some examples of the invention, the separator further comprises: the reinforcing structures are arranged on the lower surfaces of the first sub-connecting plates and the second sub-connecting plates; the separator is a metal piece.

Compared with the prior art, battery package have following advantage:

according to the utility model discloses a battery pack, through setting up the separator, can prevent to spout adjacent electric core subassembly from explosion-proof valve opening spun high temperature material on, can avoid electric core to take place the thermal runaway to can prevent that battery pack from exploding, catching fire, and then can reduce battery pack's safety in utilization.

Another object of the present invention is to provide an energy storage device.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

an energy storage device comprises the battery pack.

The advantages of the energy storage device and the battery pack are the same as those of the battery pack in the prior art, and are not described in detail herein.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

fig. 1 is a top view of a battery pack according to an embodiment of the present invention;

fig. 2 is a cross-sectional view of a battery pack according to an embodiment of the present invention;

fig. 3 is an assembly diagram of a lower case and a battery cell of a battery pack according to an embodiment of the present invention;

fig. 4 is a top view of the assembled lower case and the battery cell of the battery pack according to the embodiment of the present invention;

fig. 5 is a schematic view of a lower case of a battery pack according to an embodiment of the present invention;

fig. 6 is an assembly view of a lower case and a support structure of a battery pack according to an embodiment of the present invention;

fig. 7 is a schematic view of a support structure of a battery pack according to an embodiment of the present invention;

fig. 8 is a schematic view of a support beam of a battery pack according to an embodiment of the present invention;

fig. 9 is a cross-sectional view of a support beam of a battery pack according to an embodiment of the present invention;

fig. 10 is a schematic view of an upper case of a battery pack according to an embodiment of the present invention;

fig. 11 is an exploded view of an upper case of a battery pack according to an embodiment of the present invention;

fig. 12 is a schematic view of a separator of a battery pack according to an embodiment of the present invention;

fig. 13 is a schematic view of another embodiment of a separator for a battery pack according to an embodiment of the present invention.

Description of reference numerals:

a battery pack 10;

a housing 1;

an upper case 11; an upper shell 111; a lower shell 112; a frame 113; a lower shell attachment plate 114; a vertical plate 115; a lower housing connecting plate 116;

a lower case 12;

the edge beam 121; an attachment portion 1211;

a support plate assembly 122; a first base plate 1221; a second base plate 1222;

a support beam 123; a weight-reducing lumen 1231; a first sub-support plate 1232; a second sub-supporting plate 1233; a third sub-support plate 1234; a fourth sub-supporting plate 1235; a fifth sub-supporting plate 1236; a sixth sub-supporting plate 1237;

a housing chamber 13; a first reinforcing plate 14; a second reinforcing plate 15;

a battery core 2; an electric core assembly 21; an end plate 22;

a support structure 3; the sub-support structure 31; a first connecting plate 32; a second connecting plate 33; a third connecting plate 34; a fourth connecting plate 35; a fifth connecting plate 36;

a separator 4; a connecting plate 41; a partition plate 42; the first sub-interval plate 43; a second sub-partition 44; a first sub-connecting plate 45; a second sub-connection plate 46; a reinforcing structure 47;

a reinforcing plate 5.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

As shown in fig. 1 to 13, according to the battery pack 10 of the embodiment of the present invention, the battery pack 10 includes: a housing 1 and a plurality of cells 2. The housing 1 defines a containing cavity 13, the housing 1 may include an upper housing 11 and a lower housing 12, the upper housing 11 and the lower housing 12 define the containing cavity 13 together, the plurality of battery cells 2 are disposed in the containing cavity 13, it should be noted that a partial structure of the plurality of battery cells 2 is disposed in the lower housing 12, the plurality of battery cells 2 form a multi-row battery cell assembly 21, the multi-row battery cell assembly 21 is disposed in parallel, and the plurality of battery cells 2 in each row of battery cell assembly 21 are sequentially stacked along a length direction of the housing 1, and a length direction of the housing 1 refers to a front-back direction in fig. 4.

Wherein, at the in-process of producing battery package 10 of this application, a plurality of electric cores 2 pile up and set up in holding chamber 13, compare with prior art, need not set into the battery module with a plurality of electric cores 2 earlier, can save the spare part of assembling into the battery module with a plurality of electric cores 2, save the setting of unnecessary spare part in the battery package 10, can sparingly hold chamber 13 inner space, thereby can increase the quantity that sets up of electric core 2 in the battery package 10, and then can promote the duration of battery package 10. In addition, since the arrangement of unnecessary parts in the battery pack 10 is omitted, the assembly process of the battery pack 10 can be simplified, the production efficiency of the battery pack 10 can be improved, the production cost of the battery pack 10 can be reduced, and the weight of the battery pack 10 can be reduced.

Further, the battery pack 10 may further include: supporting structure 3, supporting structure 3 support under between casing 12 and a plurality of electric core 2, and supporting structure 3 and casing 12 and a plurality of electric core 2 are all connected down, set up like this and can be fixed in casing 12 down with a plurality of electric cores 2 reliably to can avoid electric core 2 not hard up, also can prevent that electric core 2 from rocking, can also avoid battery package 10 to take place the short circuit, and then can promote battery package 10's safety in utilization.

The utility model discloses a in some embodiments, bearing structure 3 can set up to a plurality ofly, and multirow electric core subassembly 21 and a plurality of bearing structure 3 one-to-one need explain that the quantity of bearing structure 3 and electric core subassembly 21 can be the same, and a bearing structure 3 is connected with an electric core subassembly 21, so set up and can guarantee to be fixed in casing 12 down with every row of electric core subassembly 21 all reliably to can make bearing structure 3's the form of setting more reasonable. However, the utility model discloses be not limited to this, support structure 3 set up quantity can set up 2 times of quantity for electric core subassembly 21, and one row of electric core subassembly 21 is fixed in casing 12 down through two support structure 3.

In some embodiments of the present invention, each supporting structure 3 is extended along the length direction of the corresponding cell assembly 21, wherein the length direction of the cell assembly 21 is the front-back direction in fig. 4, so as to connect the supporting structure 3 and the plurality of cells 2 of the corresponding cell assembly 21 together, thereby better fixing the cells 2.

In some embodiments of the present invention, each supporting structure 3 may include a plurality of sub-supporting structures 31, the plurality of sub-supporting structures 31 are sequentially connected along the length direction of the electric core 2, that is, the plurality of sub-supporting structures 31 are sequentially connected along the left and right directions in fig. 2, so that the setting area of the supporting structure 3 can be increased.

In some embodiments of the present invention, as shown in fig. 7, each sub-support structure 31 may include: first connecting plate 32, second connecting plate 33 and third connecting plate 34, first connecting plate 32 is connected with the first lateral wall of second connecting plate 33, third connecting plate 34 and second connecting plate 33 with the relative second lateral wall of first lateral wall be connected, first connecting plate 32 and third connecting plate 34 all are connected with casing 12 down, second connecting plate 33 is connected with electric core 2, the work purpose that supporting structure 3 and electric core 2, lower casing 12 all are connected can be realized in the setting like this.

The utility model discloses an in some embodiments, the height of first connecting plate 32 and the height of third connecting plate 34 are the same, and the height of second connecting plate 33 is higher than the height of first connecting plate 32, and wherein, after bearing structure 3 installed between electric core 2 and lower casing 12, can be spaced apart electric core 2 and lower casing 12, be favorable to electric core 2's heat dissipation, can prevent electric core 2 overtemperature better.

In some embodiments of the present invention, in the height direction of the sub-supporting structure 31, the projection of the first connecting plate 32 and the projection of the second connecting plate 33, the projection of the first connecting plate 32 and the projection of the third connecting plate 34, and the projection of the second connecting plate 33 and the projection of the third connecting plate 34 are not overlapped, so that the first connecting plate 32, the second connecting plate 33 and the third connecting plate 34 are spaced apart along the length direction of the battery cell 2, and the interference between the first connecting plate 32, the second connecting plate 33 and the third connecting plate 34 can be avoided.

In some embodiments of the present invention, as shown in fig. 7, each sub-support structure 31 may further include: fourth connecting plate 35 and fifth connecting plate 36, fourth connecting plate 35 connects between first connecting plate 32 and second connecting plate 33 in the slope, and fifth connecting plate 36 connects between second connecting plate 33 and third connecting plate 34 in the slope, in the direction of height of bearing structure 3, so set up can be spaced apart second connecting plate 33 and first connecting plate 32, third connecting plate 34, bearing structure 3 installs behind between electric core 2 and lower casing 12, can guarantee to separate apart electric core 2 and lower casing 12.

In some embodiments of the present invention, the supporting structure 3 may be provided as a metal piece or a plastic piece. Wherein, bearing structure 3 can set up to the working of plastics, the bearing structure 3 and the lower casing 12 bonding of working of plastics, the bearing structure 3 of working of plastics has thermal-insulated, it is insulating, the effect of casing 12's bottom collision energy buffering under the absorption, it can avoid battery package 10 outside heat to transmit to electric core 2 from bearing structure 3 to set up like this, also can avoid battery package 10 electric leakage, when the bottom of lower casing 12 receives the collision, bearing structure 3 can absorb the collision energy, thereby can avoid electric core 2 to be damaged by the collision.

Furthermore, the support structure 3 may be provided as a metal piece, for example: aluminum alloy, steel sheet, bearing structure 3 can be directly with casing 12 welding down, or adopt the mode of bonding to fix bearing structure 3 on casing 12 down, so set up the structural strength that can promote casing 12 down, can promote casing 12 down and resist the ability of colliding. However, the present invention is not limited thereto, and the support structure 3 may be formed by combining a plurality of materials.

Specifically, a plurality of electric cores 2 all extend along the width direction of casing 1, and the width that holds chamber 13 is W mm, and it should be noted that, the width direction of casing 1, the width direction that holds chamber 13 are the left and right directions in fig. 4, and the length of a plurality of electric cores 2 is L mm, satisfies the relational expression: l ═ W₁N mm, where n is the number of rows of the cell assembly 21, i.e., the plurality of cells 2 form n rows of the cell assembly 21, n may be set to a value of 2 to 8, and preferably n is an even number, for example: n is 2, 4, 6, 8, can form the electrical connection and come and go return circuit like this setting for electric output end positive negative pole all is in same side, and the use of electrical connection cable, copper bar etc. is minimum, and further, n is 2 or 4, can make the row number of arranging of electric core subassembly 21 reduce, is favorable to promoting the space utilization ratio in battery package 10. Specifically, n is 2, W is not less than W and is not more than W when the thickness is within the range of 250mm₁W.ltoreq.w-50 mm, for example: the value of W sets up to 1280mm, 1280mm-130mm 1150mm, 1150/2 575mm, the length L of electricity core 2 is 575mm, so set up the length dimension that can make electricity core 2 and the width dimension who holds chamber 13 more suitable, can arrange more electricity cores 2 in holding chamber 13, thereby can avoid holding 13 inner spaces of chamber extravagant, and then can promote and hold 13 inner spaces utilization ratio of chamber, and, also can promote the energy density of battery package 10, thereby can beTo further improve the endurance of the battery pack 10.

The utility model discloses an in some embodiments, the height that holds chamber 13 sets up to H mm, and every electric core 2 highly all sets up to H mm, satisfies the relational expression: h-45mm is not less than H and not more than H-5mm, wherein the height direction of the battery cell 2 is the same as that of the accommodating cavity 13, the height direction of the accommodating cavity 13 and the height direction of the battery cell 2 are both the upper and lower directions in the figure 2, the height dimension of the accommodating cavity 13 and the height dimension of the battery cell 2 are more suitable by the arrangement, the battery cell 2 can be assembled in the accommodating cavity 13, the smooth assembly of the battery pack 10 can be ensured, and the height dimension of the battery cell 2 can be made as large as possible in the height direction of the battery cell 2, so that the energy density of the battery cell 2 can be improved, and the energy density of the battery pack 10 can be further improved.

Further, H (65% -95%) H, so set up and to guarantee better that electric core 2 can assemble in holding chamber 13 to can further guarantee that battery package 10 can assemble the completion smoothly, and, at the direction of height of electric core 2, can make electric core 2's height dimension do as big as possible, thereby can further promote electric core 2's energy density, and then can further promote battery package 10's energy density.

Specifically, the height direction of the accommodating chamber 13 is the same as the height direction of the housing 1, the width direction of the housing 1 is the same as the width direction of the accommodating chamber 13, and the length direction of the housing 1 is the same as the length direction of the accommodating chamber 13, and it should be noted that the height direction of the accommodating chamber 13 and the height direction of the housing 1 are both the up-down direction in fig. 2, the width direction of the housing 1 and the width direction of the accommodating chamber 13 are both the left-right direction in fig. 4, and the length direction of the housing 1 and the length direction of the accommodating chamber 13 are both the front-back direction in fig. 4.

In some embodiments of the present invention, as shown in fig. 3, the end portion of the electric core 2 deviating from the electric core 2 at the two ends of each row of the electric core assembly 21 is provided with the end plate 22, it can also be understood that the outer end of the electric core 2 at the two ends of each row of the electric core assembly 21 is provided with the end plate 22, the end plate 22 and the electric core 2 can be bonded and fixed, the end plate 22 can also be connected with the lower casing 12, wherein, the end plates 22 at the two ends of each row of the electric core assembly 21 can clamp a plurality of electric cores 2 in the electric core assembly 21 tightly, and the electric core assembly 21 can also be limited in the length direction of the casing 1, so as to better fix the electric core 2.

In some embodiments of the present invention, a first insulating layer and/or a first thermal insulating layer may be disposed between the battery cell 2 and the end plate 22, and it can also be understood that only the first insulating layer may be disposed between the battery cell 2 and the end plate 22, and also only the first thermal insulating layer may be disposed therebetween, and the first insulating layer and the first thermal insulating layer may also be disposed therebetween. Wherein, the first insulation layer has insulating effect, can prevent through setting up the first insulation layer that battery package 10 from end plate 22 department electric leakage, can avoid the user to electrocute, thereby can promote the safety in utilization of battery package 10, and, first insulating layer has thermal-insulated effect, can avoid electric core 2's heat transfer to end plate 22 through setting up first insulating layer, can avoid electric core 2's heat to pass through end plate 22 dissipation, thereby can prevent that the tip electricity core 2 of electricity core subassembly 21 and the 2 difference in temperature that lie in electricity core at the middle part of electricity core subassembly 21 are big.

The utility model discloses an in some embodiments, can be provided with second insulating layer and/or second insulating layer between two arbitrary adjacent electric cores 2 in every row of electric core subassembly 21, that is to say, can only be provided with the second insulating layer between two arbitrary adjacent electric cores 2 in every row of electric core subassembly 21, also can only be provided with the second insulating layer, can also be provided with second insulating layer and second insulating layer simultaneously. Wherein, the second insulating layer has insulating effect, can prevent electric leakage between two adjacent electric cores 2 through setting up the second insulating layer, can further avoid the user to electrocute to can further promote the safety in utilization of battery package 10, and, the second insulating layer has thermal-insulated effect, can avoid the heat to transmit between two adjacent electric cores 2 through setting up the second insulating layer, can prevent that electric core 2 from taking place thermal runaway. However, the present invention is not limited thereto, and any two adjacent cells 2 in each row of the cell assembly 21 may be directly bonded together.

The utility model discloses a some embodiments, bearing structure 3's surface can be provided with the insulating layer (be the third insulating layer), and the third insulating layer has the heat-proof quality, sets up like this and can prevent that electric core 2's heat transfer from bearing structure 3, can avoid in the battery package 10 heat to distribute from bearing structure 3 to can promote the thermal insulation performance of battery package 10, and then can make battery package 10 keep at suitable operating temperature.

In some embodiments of the present invention, as shown in fig. 2, the battery pack 10 may further include: separator 4, separator 4 is located between two adjacent rows of electric core subassembly 21, separator 4 can be spaced apart with adjacent electric core subassembly 21 with the anti-riot valve opening of electric core 2 in electric core subassembly 21, also can understand, separator 4 can be spaced apart with the electric core subassembly 21 that the anti-riot valve opening of electric core 2 is relative with the anti-riot valve opening, so set up the anti-riot valve opening that can prevent electric core 2 and adjacent electric core subassembly 21 directly relative, when electric core 2 is unusual from anti-riot valve opening blowout high temperature material, high temperature material directly spouts on separator 4, can prevent from directly spouting adjacent electric core subassembly 21 from anti-riot valve opening spun high temperature material, thereby can avoid electric core 2 to take place the thermal runaway, also can prevent battery package 10 explosion, catch fire, and then can further reduce battery package 10's safety in utilization.

In some embodiments of the present invention, in the up-down direction of the battery pack 10, the upper end of the separating element 4 is higher than or equal to the height of the anti-explosion valve opening, so that the separating element 4 can be spaced apart from the adjacent cell assembly 21, and the height of the separating element 4 is more suitable.

In some embodiments of the present invention, as shown in fig. 4, the electric core assembly 21 can be arranged in two rows, two rows of electric core assemblies 21 are arranged along the width direction of the casing 1 at intervals, the width direction of the casing 1 is the left and right direction in fig. 4, so as to ensure that the separating member 4 is arranged between two adjacent rows of electric core assemblies 21, and the explosion-proof valve opening of the electric core 2 can be prevented from being directly opposite to the adjacent electric core assembly 21.

The utility model discloses a some embodiments, the side of separator 4 relative with explosion-proof valve opening can be equipped with the insulating layer, and the insulating layer can set up to thermal insulation materials such as mica, aerogel, spouts back on separator 4 from explosion-proof valve opening spun high temperature material, can prevent that high temperature material from spouting separator 4 and melt, can prevent better that the high temperature material from explosion-proof valve opening spun directly spouts adjacent electric core subassembly 21.

In some embodiments of the present invention, the separator 4 may be provided as a metal member, for example: the separator 4 can be made by the aluminium alloy, also can process through the panel beating material and make, and preferably, separator 4 is made by the steel sheet, and the high temperature resistance of steel sheet is good, and is with low costs, need not set up the insulating layer on separator 4.

The utility model discloses an in some embodiments, separator 4 can extend the setting along the length direction of electricity core subassembly 21, and the setting can be guaranteed to separate the explosion-proof valve opening of electricity core 2 and adjacent electricity core subassembly 21 apart like this, can make separator 4's the mode of setting more reasonable.

The utility model discloses an in some embodiments, as shown in fig. 2, the partition 4 is arranged with adjacent electric core subassembly 21 spaced apart, so set up and can prevent that partition 4 from blockking up the explosion-proof valve opening of electric core 2, when electric core 2 takes place unusually, can guarantee that high temperature material can follow explosion-proof valve opening blowout.

According to a specific embodiment of the present invention, as shown in fig. 12, the partitioning member 4 includes: connecting plate 41 and space bar 42, space bar 42 set up in the upper surface of connecting plate 41, and space bar 42 is located between two adjacent rows of electric core subassemblies 21, and connecting plate 41 all is connected with two adjacent rows of electric core subassemblies 21, and wherein, connecting plate 41 bonds with the lower surface of the tip of two adjacent rows of electric core subassemblies 21, sets up like this and can connect two adjacent rows of electric core subassemblies 21 as a whole, can promote the overall structure intensity of two adjacent rows of electric core subassemblies 21.

Further, the connecting plate 41 and the partition plate 42 are integrally formed, so that the structural strength of the partitioning member 4 can be improved, the partitioning member 4 can be prevented from being deformed, the number of molds for producing the partitioning member 4 can be reduced, and the production cost of the partitioning member 4 can be reduced.

According to another embodiment of the present invention, as shown in fig. 13, the separator 4 may include: the first and second sub-interval plates 43 and 44 are welded and connected, and the first and second sub-interval plates 43 and 44 are located between two adjacent rows of the core assemblies 21, and the first and second sub-interval plates 43 and 44 may separate the explosion-proof valve opening of the cell 2 from the core assembly 21 opposite to the explosion-proof valve opening.

Further, the lower end of the first sub-spacing plate 43 has a first sub-connecting plate 45 extending away from the second sub-spacing plate 44, the first sub-connecting plate 45 is connected with the lower surface of the adjacent electric core assembly 21, the lower end of the second sub-spacing plate 44 has a second sub-connecting plate 46 extending away from the first sub-spacing plate 43, and the second sub-connecting plate 46 is connected with the lower surface of the adjacent electric core assembly 21. However, the present invention is not limited to this, and the separator 4 may be formed by bending a steel plate.

Further, the separator 4 may further include: and a reinforcing structure 47, wherein the reinforcing structure 47 is disposed on the lower surfaces of the first sub-connecting plate 45 and the second sub-connecting plate 46, and the reinforcing structure 47 can be welded on the lower surfaces of the first sub-connecting plate 45 and the second sub-connecting plate 46, so as to improve the rigidity and strength of the separator 4.

In some embodiments of the present invention, as shown in fig. 2, the upper housing 11 may include: upper casing 111 and lower casing 112, upper casing 111 is connected with lower casing 112, it should be explained, can be the edge of upper casing 111 and the edge welded connection of lower casing 112, and inject the cooling runner between upper casing 111 and the lower casing 112, the cooling runner can be provided with import and export, the refrigerant can flow into the cooling runner from the import, the refrigerant can flow out the cooling runner from the export, lower casing 112 all is connected with a plurality of electric core 2, lower casing 112 can be in the same place through sticky with electric core 2, wherein, flow into behind the refrigerant in the cooling runner, the refrigerant in the cooling runner can carry out the heat exchange with battery package 10, thereby can take away the heat in battery package 10, and then can further avoid battery package 10 to take place the thermal runaway. When the temperature in the battery pack 10 is too low, heat can be transferred to the battery pack 10 by heat exchange between the refrigerant and the battery pack 10, and the battery pack 10 can be maintained at an appropriate operating temperature, so that the battery pack 10 can be maintained in an excellent operating state. Meanwhile, by fixedly connecting the upper end of the battery cell 2 to the lower casing 112 and fixedly connecting the lower end of the battery cell 2 to the supporting structure 3, the battery cell 2 can be more stably installed in the casing 1, so that the position of the battery cell 2 can be more firm.

In some embodiments of the present invention, as shown in fig. 2, the battery pack 10 may further include: reinforcing plate 5, reinforcing plate 5 can locate on the upper surface of lower floor's casing 112, and wherein, reinforcing plate 5 can weld or bond at the upper surface of lower floor's casing 112, and wherein, reinforcing plate 5 has the effect that increases lower floor's casing 112 structural strength, and when last casing 11 received the extrusion force, can avoid last casing 11 to take place to warp to can prevent that electricity core 2 from taking place to warp.

In some embodiments of the utility model, as shown in fig. 2, the multirow electric core subassembly 21 is spaced apart along the width direction of last casing 11 and is set up, and at the direction of height of battery package 10, reinforcing plate 5 is located between two rows of adjacent electric core subassemblies 21, so set up each regional structural strength that can make last casing 11 more unified, can make the position that sets up of reinforcing plate 5 more reasonable.

In addition, in the height direction of the battery pack 10, that is, in the up-down direction in fig. 2, the reinforcing plate 5 and the two adjacent rows of the electric core assemblies 21 all have an overlapping region, wherein, as shown in fig. 2, in the up-down direction, the projection of the reinforcing plate 5 and the projection of the two rows of the electric core assemblies 21 all have an overlapping region, and the reinforcing plate 5 can play a role of connecting the two rows of the electric core assemblies 21, so that the two adjacent rows of the electric core assemblies 21 can be connected into a whole.

Further, in the width direction of the upper case 11, the width of the overlapping area is a, and the relation: a is not more than 20mm, so the size of the overlapping area between the reinforcing plate 5 and the two adjacent rows of electric core assemblies 21 is more suitable, and the effect of connecting the two rows of electric core assemblies 21 can be better achieved.

In some embodiments of the present invention, the reinforcing plate 5 may extend along the length direction of the electric core assembly 21, and thus the upper ends of the electric core assemblies 21 in two adjacent rows can be reliably connected together.

In some embodiments of the present invention, as shown in fig. 2, the upper housing 11 may further include: and a frame 113, wherein the frame 113 is connected between the lower case 112 and the lower case 12 of the battery pack 10, the frame 113 can be welded to the lower case 112, and the frame 113 can be screwed to the lower case 12, so that the upper case 11 and the lower case 12 can be reliably assembled together, and the assembly of the battery pack 10 can be realized.

In some embodiments of the present invention, as shown in fig. 2, the frame 113 may include: lower floor's casing connecting plate 114, vertical board 115 and lower casing connecting plate 116, lower floor's casing connecting plate 114 sets up in the top of vertical board 115 and is connected with lower floor's casing 112, lower casing connecting plate 116 sets up in the bottom of vertical board 115 and is connected with lower casing 12, wherein, frame 113 and lower floor's casing 112 are two solitary parts, during casing 11 in the production, weld frame 113 on the lower floor's casing 112 of last casing 11, last casing among the prior art passes through the panel beating punching press and forms, compare with the technical scheme of casing in the prior art production, can reduce the die drawing angle of casing 11 in-process in the production, also can avoid the waste of installation space in the last casing 11, thereby can have bigger chamber 13 that holds in making the battery package 10.

Further, lower floor's casing connecting plate 114 and vertical board 115, lower casing connecting plate 116 all set up perpendicularly with vertical board 115, compare with the technical scheme of casing on prior art production, can further reduce the draft angle of casing 11 in-process on the production, also can further avoid the waste of installation space in the casing 11 to have bigger chamber 13 that holds in can making the battery package 10.

In some embodiments of the present invention, as shown in fig. 2, the vertical plate 115 is spaced apart from the electric core 2, preferably, the spacing distance between the vertical plate 115 and the electric core 2 is set to 20mm-25mm, when the whole vehicle receives external extrusion force, the whole vehicle structure beam collapses to the battery pack 10, and by spacing the vertical plate 115 apart from the electric core 2, the upper housing 11 can be prevented from extruding the electric core 2, and the safety risk that the external extruded battery pack 10 affects the battery pack 10 can be reduced.

In some embodiments of the present invention, as shown in fig. 2 and 5, the lower housing 12 may include: the edge beam 121, the support plate assembly 122 and the support beam 123, wherein the edge beam 121 is constructed in a closed loop structure, the support plate assembly 122 can be disposed on the inner side of the edge beam 121, the support plate assembly 122 is connected with the edge beam 121, and the support beam 123 is connected between the edge beam 121 and the support plate assembly 122. Wherein, supporting plate subassembly 122 can be in the same place with boundary beam 121 welding, through setting up a supporting beam 123, can promote the structural strength of casing 12 down, and when casing 12 received the extrusion force down, can avoid casing 12 to take place to warp down to can prevent that electric core 2 from being crushed by casing 12 extrusion down, and then can prolong the life of battery package 10.

And, when whole car receives outside extrusion force, whole car structure roof beam is crumpled to battery package 10, and the part relative with upper housing 11 of whole car structure roof beam can not cause great overturning moment of torsion to lower casing 12, and when the part relative with lower casing 12 of whole car structure roof beam extrudes lower casing 12, supporting beam 123 can transmit the horizontally extrusion force for backup pad subassembly 122, can guarantee that outside extrusion force passes through backup pad subassembly 122 horizontal transmission, thereby can reduce the buckling of backup pad subassembly 122, and then can make lower casing 12 better resist the extrusion force of whole car.

In some embodiments of the present invention, as shown in fig. 9, the supporting beam 123 may define a weight reduction cavity 1231, the weight reduction cavity 1231 has a weight reduction effect, the weight of the supporting beam 123 can be reduced, and the light weight design of the battery pack 10 can be better realized.

In some embodiments of the present invention, the cross-section of the supporting beam 123 may be configured as a polygonal type, for example: the cross section of the support beam 123 may be configured as a hexagon.

In some embodiments of the present invention, as shown in fig. 9, the supporting beam 123 may include: the first sub-support plate 1232, the second sub-support plate 1233, the third sub-support plate 1234, the fourth sub-support plate 1235, the fifth sub-support plate 1236 and the sixth sub-support plate 1237 are sequentially connected to form the weight reducing cavity 1231, and the operation purpose of arranging the weight reducing cavity 1231 can be achieved through the arrangement.

In some embodiments of the present invention, as shown in fig. 9, the first sub-supporting plate 1232 is disposed along the height direction of the lower housing 12, and the first sub-supporting plate 1232 is connected to the inner sidewall of the boundary beam 121, wherein the height direction of the lower housing 12 is the up-down direction in fig. 2, because the inner sidewall of the boundary beam 121 is disposed along the up-down direction, the arrangement enables the first sub-supporting plate 1232 to be parallel to the inner sidewall of the boundary beam 121, which can facilitate the connection of the first sub-supporting plate 1232 to the inner sidewall of the boundary beam 121, so that the first sub-supporting plate 1232 and the inner sidewall of the boundary beam 121 can be reliably assembled together.

In some embodiments of the present invention, the third sub-supporting plate 1234 extends along a horizontal direction, and the third sub-supporting plate 1234 is connected to the supporting plate assembly 122, wherein the horizontal direction is the left-right direction in fig. 2, because the supporting plate assembly 122 extends along the horizontal direction, the third sub-supporting plate 1234 and the supporting plate assembly 122 can be parallel due to the arrangement, so that the third sub-supporting plate 1234 and the supporting plate assembly 122 can be conveniently connected, and thus the third sub-supporting plate 1234 and the supporting plate assembly 122 can be stably assembled together, and the supporting beam 123 can be reliably connected between the supporting plate assembly 122 and the side beam 121.

In some embodiments of the present invention, the first sub-supporting plate 1232 and the fourth sub-supporting plate 1235, the second sub-supporting plate 1233 and the fifth sub-supporting plate 1236, the third sub-supporting plate 1234 and the sixth sub-supporting plate 1237 are all arranged in parallel, so that the structural strength of the supporting beam 123 can be improved, the bending resistance of the supporting beam 123 can be improved, and the supporting beam 123 can be prevented from deforming.

In some embodiments of the present invention, as shown in fig. 9, the weight-reducing cavity 1231 may have therein a first reinforcing plate 14 and a second reinforcing plate 15, the first reinforcing plate 14 and the second reinforcing plate 15 are arranged in a crossed manner, and the first reinforcing plate 14 and the second reinforcing plate 15 have the function of reinforcing the strength of the reinforcing structure 47, so as to further enhance the structural strength of the supporting beam 123, and further enhance the bending resistance of the supporting beam 123, thereby further preventing the supporting beam 123 from deforming.

In some embodiments of the present invention, the first reinforcing plate 14 extends along the height direction of the lower shell 12, so that the first reinforcing plate 14 can be reliably supported between the weight-reducing cavities 1231, and the bending resistance of the supporting beam 123 can be better improved.

In some embodiments of the present invention, as shown in fig. 2, the support plate assembly 122 may include: first and second bottom plates 1221 and 1222, the first and second bottom plates 1221 and 1222 being disposed in parallel and spaced apart, the first and second bottom plates 1221 and 1222 each being connected to the edge beam 121, the first bottom plate 1221 being disposed above the second bottom plate 1222, wherein the support structure 3 is connected to the first bottom plate 1221.

In some embodiments of the present invention, as shown in fig. 2, the lower housing 12 may further include: the mounting portion 1211 is provided on the side member 121, and the battery pack 10 can be mounted on the vehicle by providing the mounting portion 1211.

According to the utility model discloses energy storage device, including the battery package 10 of above-mentioned embodiment, battery package 10 sets up on energy storage device, this battery package 10 is through piling up into multirow battery element group spare 21 to a plurality of electric cores 2, at the in-process of producing battery package 10, need not set into the battery module with a plurality of electric cores 2 earlier, can increase the quantity that sets up of electric core 2 in the battery package 10, thereby can promote the duration of battery package 10, and, through setting up bearing structure 3, can be fixed in casing 12 down with a plurality of electric cores 2 reliably, can avoid electric core 2 not hard up.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A battery pack (10), comprising:

a housing (1), said housing (1) defining a housing chamber (13);

a plurality of battery cells (2), a plurality of battery cells (2) being arranged in the accommodating cavity (13), a plurality of battery cells (2) forming a multi-row battery cell assembly (21);

separators (4), the separator (4) are located between two adjacent rows of the electric core assembly (21), in order to separate the explosion-proof valve opening of the electric core (2) in the electric core assembly (21) and the adjacent electric core assembly (21).

2. The battery pack (10) according to claim 1, wherein the separator (4) has an upper end height higher than or equal to the height of the explosion-proof valve opening.

3. The battery pack (10) according to claim 1, wherein a side of the separator (4) opposite to the explosion-proof valve opening is provided with a heat insulating layer.

4. The battery pack (10) of claim 1, wherein the separator (4) extends along a length of the cell assembly (21).

5. The battery pack (10) of claim 1, wherein the separator (4) is spaced apart from the adjacent cell assembly (21).

6. The battery pack (10) according to claim 1, wherein the separator (4) comprises: connecting plate (41) and space bar (42), space bar (42) are located the upper surface of connecting plate (41), space bar (42) are located adjacent two rows between electric core subassembly (21), connecting plate (41) and adjacent two rows electric core subassembly (21) all connect.

7. The battery pack (10) according to claim 1, wherein the separator (4) comprises: a first sub-interval plate (43) and a second sub-interval plate (44), the first sub-interval plate (43) and the second sub-interval plate (44) being connected and located between two adjacent rows of the electric core assembly (21).

8. The battery pack (10) according to claim 7, wherein the lower end of the first sub-spacer plate (43) has a first sub-connecting plate (45) extending away from the second sub-spacer plate (44), the first sub-connecting plate (45) being connected to the adjacent cell assembly (21);

the lower end of the second sub-interval plate (44) is provided with a second sub-connecting plate (46) extending away from the first sub-interval plate (43), and the second sub-connecting plate (46) is connected with the adjacent electric core assembly (21).

9. The battery pack (10) according to claim 8, wherein the separator (4) further comprises: a reinforcing structure (47), the reinforcing structure (47) being provided on a lower surface of the first sub-connecting plate (45) and a lower surface of the second sub-connecting plate (46);

the separator (4) is a metal piece.

10. An energy storage device, characterized by comprising a battery pack (10) according to any one of claims 1-9.

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