CN219180633U

CN219180633U - Current collector protection support, battery cell, battery pack and vehicle

Info

Publication number: CN219180633U
Application number: CN202223180139.8U
Authority: CN
Inventors: 杨慧敏; 赵吉祥; 刘鑫; 赵赫; 张伯都; 张亮; 张浩伟; 安洪力
Original assignee: Bluepark System Branch Of Baic New Energy Motor Co ltd; Beijing Electric Vehicle Co Ltd
Current assignee: Bluepark System Branch Of Baic New Energy Motor Co ltd; Beijing Electric Vehicle Co Ltd
Priority date: 2022-06-20
Filing date: 2022-11-26
Publication date: 2023-06-13
Anticipated expiration: 2032-11-26
Also published as: CN115775951A; CN219180632U; CN219180635U; CN219180628U; CN219180630U; CN219180631U; CN219303796U; CN219180634U; CN219180629U

Abstract

The application discloses a collector protective bracket, a battery cell, a battery pack and a vehicle, belonging to the technical field of battery manufacturing. The inner side of the current collector protection bracket defines a clamping area for clamping the current collector of the pole core; and a support positioning structure matched with the protective film of the pole core is arranged on the outer side of the current collector protective support. According to the current collector protective bracket method, through the arrangement of the positioning structure, the protective film and the current collector protective bracket are mutually matched, the purpose that the distance between the protective film and the cover plate is limited is achieved, and the protective film wraps the pole core, so that the current collector protective bracket and the pole core are firmly and reliably connected.

Description

Current collector protection support, battery cell, battery pack and vehicle

Cross Reference to Related Applications

The present application claims priority from chinese patent application No. 202221547710.2 entitled "power battery cover and battery" filed by beijing new energy automobile, blue valley power system division, 2022, 6 and 20, the entire contents of which are incorporated herein by reference.

Technical Field

The application belongs to the technical field of battery manufacturing, and particularly relates to a current collector protection support, a battery cell, a battery pack and a vehicle.

Background

Some collector protective brackets can be buckled on a battery cover plate through a buckle structure, and a protective film is fixed on the collector protective brackets through a hot melting mode, however, the inventor finds that in the related art, because the specific positions of the collector protective brackets and the protective film can not be determined, the distance between the protective film and the cover plate can be possibly larger or smaller, if the distance between the protective film and the cover plate is too small, explosion point abnormality is easily generated when a cover is welded, and serious potential safety hazards are caused.

Disclosure of Invention

The present application aims to solve at least one of the technical problems existing in the prior art. Therefore, the current collector protection support, the battery cell, the battery pack and the vehicle are provided, and the purpose of limiting the distance between the protection film and the cover plate is achieved through the cooperation of the protection film open hole and the protection support positioning column.

In a first aspect, the present application provides a current collector protective bracket,

the inner side of the current collector protection bracket defines a clamping area for clamping the current collector of the pole core;

And a support positioning structure matched with the protective film of the pole core is arranged on the outer side of the current collector protective support.

According to the current collector protection bracket, through the setting of location structure, make protection film and current collector protection bracket mutually support, reached the purpose that protection film and apron distance prescribe a limit to, the pole core is lived to the protection film parcel moreover, consequently current collector protection bracket and the connection of pole core are also more firm reliable.

According to an embodiment of the application, first support and second support, first support with the second support sets up relatively, and detachably connects, the centre gripping region is located first support with between the second support, first support deviates from one side of second support with second support deviates from at least one department in one side of first support is equipped with support location structure.

According to the current collector protective bracket, the split design of the current collector protective bracket reasonably splits the structure, and the arrangement of the first bracket and the second bracket improves the flexibility of the current collector protective bracket, so that the structure is more convenient to manufacture and form while rich in layers; through set up location structure in mass flow body protection support both sides, make the protection film can fix a position in mass flow body protection support's one side at least, ensured the accuracy of location, and the maneuverability in the course of working has also been improved to the multiposition location.

According to one embodiment of the present application, the first bracket is provided with a plurality of bracket positioning structures, and the second bracket is provided with a plurality of bracket positioning structures.

According to the current collector protective bracket, the design of the plurality of positioning columns of the first support and the second support increases the positioning area of the current collector protective bracket and the protective film, and the position between the current collector protective bracket and the protective film is locked more accurately, so that the normal connection and the smooth operation of the current collector protective bracket are ensured.

According to one embodiment of the present application, the first bracket and the second bracket each comprise: the clamping device comprises connecting parts positioned at two ends and clamping arms connected between the connecting parts, wherein the connecting parts of the first bracket are detachably connected with the connecting parts of the second bracket, and the clamping area is positioned between the clamping arms of the first bracket and the clamping arms of the second bracket.

According to the current collector protective bracket, through the division of the clamping area and the connecting area, the functional partition of the current collector protective bracket is clear and easy to see, and the structure is exquisite; the detachable design of the first bracket and the second bracket can avoid the defect that the integrated structure is not detachable, and is beneficial to the functional partition of the current collector protection bracket.

According to one embodiment of the application, the clamping arm is provided with a lightening hole, and the connecting part is of a box-shaped structure.

According to one embodiment of the application, the clamping arm is provided with a plurality of weight-reducing holes, at least part of which are distributed in different directions or in different shapes.

According to the current collector protective bracket, the exhaust effect can be improved through the hollowed-out design, the weight of the protective bracket is reduced, and the quality energy density of the battery is improved; meanwhile, the suffocating of the electrolyte during injection can be reduced, and the electrolyte is convenient to inject.

According to one embodiment of the present application, the connection portion of the first bracket is connected to the connection portion of the second bracket in a clamping manner.

According to an embodiment of the application, the first connecting portion of first support is equipped with the public head of joint, the second connecting portion of first support is equipped with the female head of joint, the first connecting portion of first support is equipped with the female head of joint, the second connecting portion of first support is equipped with the public head of joint, and the public head of joint includes a plurality of elasticity joint pieces that set up along circumference interval.

According to the current collector protection bracket, the first bracket and the second bracket are connected through the clamping structure, reasonable clamping layout and structural design are utilized, the rigidity requirement of an assembly structure is met, and the budget cost is reduced; meanwhile, due to the design of the elastic pieces of the clamping male head and the clamping female head, the effects of tight matching and convenient disassembly are achieved.

According to one embodiment of the present application, the first bracket and the second bracket each further comprise: the reinforcing rib is positioned at the end part of the clamping area and is connected with the connecting part and the clamping arm.

According to the current collector protective bracket, the clamping force of the current collector protective bracket on the current collector can be increased by the aid of the reinforcing ribs, vibration of the current collector is reduced, and the strength and rigidity of the current collector protective bracket are improved by the aid of the reinforcing ribs arranged at the end portions.

In a second aspect, the present application provides a cell,

according to one embodiment of the present application, the cell includes:

a housing;

the pole core is arranged in the shell;

the protective film is coated outside the pole core and is provided with a protective film first positioning structure; the two end faces of the pole core, which face the cover plate component, are not covered.

The cover plate assembly is mounted at the end part of the shell and comprises any current collector protection bracket, the clamping area of the current collector protection bracket clamps the current collector of the pole core, and the bracket positioning structure is matched with the first positioning structure of the protection film.

According to the battery cell, through the positioning design of the current collector protective bracket and the protective film, the problem that the distance between the protective film and the cover plate cannot be determined is solved, the phenomenon that the battery cell is abnormal in explosion point during welding of the cover plate is avoided, and the safety performance of the battery cell is improved.

According to one embodiment of the present application, the number of the cover plate assemblies is two, the two cover plate assemblies are respectively installed at two ends of the housing, and the two cover plate assemblies each comprise an explosion-proof valve.

According to the battery cell, the explosion-proof valves are arranged on the two sides of the plurality of pole columns in parallel, so that the energy density can be improved under the condition of ensuring the current intensity, and the safety of the battery cell can be improved under the condition of not affecting the volume utilization rate.

In a third aspect, the present application provides a battery module, the battery module comprising: a plurality of cells as in any above.

According to the battery module, through using above-mentioned electric core, when guaranteeing self energy density, can also improve insulating protection structure's insulating effect to and improve its safety in utilization, and the design of independent unit has also played convenient and fast, has practiced thrift the effect of maintenance cost.

In a fourth aspect, the present application provides a battery pack comprising: a plurality of cells as in any of the above.

According to the battery pack, through the use of the battery core, the structure is greatly simplified, the battery containing capacity of the same size is expanded by using the space to be released, the quality of the battery pack is lightened, the energy density of the battery is effectively improved, and the cost is reduced.

In a fifth aspect, the present application provides a vehicle comprising: such as the battery pack described above.

According to the vehicle, an engine with larger output power can be matched, starting and accelerating are convenient, and charging and discharging capability and cruising capability are improved; meanwhile, the safety performance can be improved, and the service life can be prolonged.

Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.

Drawings

The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, wherein:

fig. 1 is a schematic structural diagram of a battery cell according to an embodiment of the present disclosure;

fig. 2 is a schematic diagram of a partial structural explosion of a battery cell according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of a pole core unit of a battery cell according to an embodiment of the present disclosure;

Fig. 4 is a schematic structural diagram of a positive electrode cover plate assembly of a battery cell according to an embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of a negative electrode cover plate assembly of a battery cell according to an embodiment of the present disclosure;

fig. 6 is a schematic diagram of the decompression of the battery cell according to the embodiment of the present application;

fig. 7 is an exploded view of a cover assembly of a battery cell provided in an embodiment of the present application;

fig. 8 is a schematic structural view of a side supporting plate of a battery cell according to an embodiment of the present disclosure;

fig. 9 is an assembly schematic diagram of a side support plate and cover plate assembly of a battery cell according to an embodiment of the present application;

fig. 10 is a partial schematic view of an assembly structure of a side support plate and a cover plate assembly of a battery cell according to an embodiment of the present application;

fig. 11 is a schematic exploded view of a part of a current collector protection support of a battery cell according to an embodiment of the present disclosure;

fig. 12 is a schematic structural view of a current collector protection support of a battery cell according to an embodiment of the present disclosure;

fig. 13 is an exploded schematic view of a current collector protection bracket of a battery cell according to an embodiment of the present disclosure;

fig. 14 is a schematic view of an expanded structure of a protective film of a battery cell according to an embodiment of the present disclosure;

fig. 15 is an assembly schematic diagram of a current collector protection support and a protection film of a battery cell according to an embodiment of the present disclosure;

Fig. 16 is a partial schematic view of an assembly structure of a current collector protection support and a protection film of a battery cell according to an embodiment of the present application.

Reference numerals:

a housing 100;

a positive electrode sheet 310, a negative electrode sheet 320, and a separator 330;

side support plate 440, side support plate positioning structure 441, side support plate limiting portion 446;

a cap plate assembly 500, a positive cap plate assembly 500a, a negative cap plate assembly 500b;

cover plate 510, positive electrode cover plate 510a, negative electrode cover plate 510b, explosion-proof valve 511, positive electrode explosion-proof valve 511a, negative electrode explosion-proof valve 511b, pole 512, positive pole 512a, negative pole 512b, liquid injection hole 514, positive electrode liquid injection hole 514a, and negative electrode liquid injection hole 514b;

the first insulation part 520, the first pressure relief hole 521, the first groove 522, the first weakening structure 523, the second avoidance hole 524, and the first clamping part 527;

current collector protective bracket 530, first bracket 530a, second bracket 530b, clamping arm 531, connecting portion 532, bracket positioning structure 533, reinforcing rib 534, second clamping member 535, bracket limiting portion 536, clamping male head 537, clamping female head 538, second pressure relief hole 539, weight reducing hole 540;

a pressing plate 560, a positive electrode pressing plate 560a, a negative electrode pressing plate 560b, a first relief hole 564;

the protective film 700, the protective film first positioning structure 710, the protective film second positioning structure 720.

Detailed Description

Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.

The application discloses a battery cell.

A cell according to an embodiment of the present application is described below with reference to fig. 1-7.

In some embodiments, as shown in fig. 1-2, the cell includes: the housing 100, the pole piece 300 (not shown in fig. 1 and 2) and two cover plate assemblies 500, since the pole piece 300 is enclosed within the housing 100.

As shown in fig. 1, the housing 100 may be a thin-walled shell, such as the thickness of the housing 100 may be 0.3mm-0.8mm, and in some embodiments, the thickness of the housing 100 may be 0.5mm or 0.7mm. The housing 100 may be made of aluminum alloy or steel, and the housing 100 may be formed in a flattened shape.

For example, in practical implementation, a whole aluminum sheet may be rolled into a rectangular cylinder, and welded on two overlapped sides to form a hollow square tube with two open ends and closed periphery. Wherein, the welding can be bending welding or high-frequency welding forming. After the welding is completed, the long and thin housing 100 may be obtained by stretching twice or other times. The aluminum alloy shell has light weight, and once the battery explodes in application, the aluminum shell can reduce explosion impact force.

Or the shell 100 may be welded by two identical aluminum sheets, one side edge of the two aluminum sheets is welded and connected, and the other side of the two aluminum sheets is also welded and connected, so as to form a hollow square tube with open ends and closed periphery as described above, and the long and thin shell 100 may be obtained by stretching twice or other times. The outer shell 100 manufactured by taking this example has weld seams on both sides, and the outer shell 100 processed by adopting a whole aluminum skin has weld seams only on one side to be welded.

The electrode core 300 is disposed in the housing 100, the electrode core 300 may include a positive electrode sheet 310, a negative electrode sheet 320, a separator 330, and an electrolyte, the electrode core 300 may be formed in a lamination or winding manner, and the electrode core 300 may include one or more minimum electrode core units.

An example in which the pole core 300 is formed by lamination will be described below.

As shown in fig. 3, a layer of negative electrode sheet 320 is placed on the separator 330, a layer of separator 330 is placed on the negative electrode sheet 320, then the positive electrode sheet 310 is placed on the separator 330 on the negative electrode sheet 320, and finally a layer of separator 330 is placed on the positive electrode sheet 310, so that the minimum electrode core unit is prepared. It should be noted that, a minimum pole core unit cannot form the complete pole core 300, and the minimum pole core units need to be stacked layer by layer in the thickness direction to make the complete pole core 300.

An example in which the pole core 300 is formed by winding is described below.

Placing a layer of negative electrode plate 320 on the diaphragm 330, placing a layer of diaphragm 330 on the negative electrode plate 320, placing a positive electrode plate 310 on the diaphragm 330 on the negative electrode plate 320, placing a layer of diaphragm 330 on the positive electrode plate 310, rolling the minimum electrode core unit into a layer-by-layer wrapped roll core shape through the rotation of a roll needle, wherein the roll core can be cylindrical or elliptic, and the roll needle can be prismatic, elliptic or circular.

The positive electrode current collector is led out from one end of the electrode core 300 and connected to the positive electrode column 512a by welding, and the negative electrode current collector is led out from the other end of the electrode core 300 and connected to the negative electrode column 512b by welding.

In practical implementation, the current collector may be welded into a metal plate by spot welding, and then the pole column 512 is used as an inner layer welding member, the current collector is located on two sides of the pole column 512, and two sides of the pole column 512 may be welded with the metal plate by electromagnetic pulse welding. It will be appreciated that current is conducted through the current collector to the pole 512 and then discharged via the plurality of poles 512 extending out of the housing 100.

As shown in fig. 1-2, two cap assemblies 500 are respectively installed at both ends of the case 100, the cap assemblies 500 and the case 100 may be connected by laser welding, and the two cap assemblies 500 are respectively a positive cap assembly 500a and a negative cap assembly 500b.

As shown in fig. 4, the positive cap plate assembly 500a may include a positive post 512a and a positive explosion protection valve 511a.

As shown in fig. 5, the negative cap plate assembly 500b may include a negative stem 512b and a negative explosion valve 511b.

The positive electrode column 512a may be a conductive material, or the positive electrode column 512a may be a multi-material composite material, for example, the positive electrode column 512a may be a ternary positive electrode material, which may include three materials of nickel, cobalt and manganese, or the ternary positive electrode material may include three materials of nickel, cobalt and aluminum, and the positive electrode column 512a may be provided with a protective sheet.

The number of the positive electrode columns 512a may be plural, wherein plural means two or more, the positive electrode columns 512a may be made into a round shape, a square shape or other shapes, one end of the positive electrode column 512a may be connected with the electrode core 300 inside the battery through integral welding, and the other end extends out of the housing to be connected with an external circuit, thereby achieving the charge and discharge effects.

The anode column 512b may be made of conductive material, for example, the anode column 512b may be made of aluminum, copper-aluminum friction welding or other materials, and the anode column 512b may be provided with a protective sheet.

The number of the cathode columns 512b may be plural, wherein plural means two or more, the cathode columns 512b may be made into a round shape, a square shape or other shapes, one end of the cathode column 512b may be integrally welded with the electrode core 300 inside the battery, and the other end extends out of the housing to be connected with an external circuit, thereby achieving the charge and discharge effects.

In the related art, the pole 512 is provided only in one, resulting in a small battery capacity and a corresponding decrease in allowable current intensity.

It will be appreciated that the above technique reduces the current density, affects the energy density, and in particular for battery powered devices, the amount of work that can be done after full charge is small, and the capacity of the battery pack is not as high as required. The battery cell of the embodiment of the present application is provided with a plurality of poles 512, so that the allowable current is stronger, the energy density is higher, and the battery cell capacity of the same weight is also higher.

The positive explosion-proof valve 511a may be disposed at the second end (right end in fig. 4) of the positive cover plate assembly 500a, the positive explosion-proof valve 511a may be made of an aluminum alloy material, and the positive explosion-proof valve 511a may be connected with the positive cover plate 510a in an integrally formed manner. The positive explosion-proof valve 511a may take a circular shape, an oval shape, or other shapes, and a protective sheet may be covered over the positive explosion-proof valve 511 a.

In actual implementation, when the internal pressure of the battery can is smaller than the explosion value set by the positive explosion-proof valve 511a, hot gas flows from the side with high pressure to the side with low pressure, gas is discharged outwards through the positive explosion-proof valve 511a, and when the internal pressure of the can is smaller than the external pressure, gas enters the inner cavity from the positive explosion-proof valve 511a, so that internal and external air pressure balance is realized.

The negative explosion-proof valve 511b may be disposed at a second end (right end in fig. 4) of the negative cap assembly 500b, the negative explosion-proof valve 511b may be made of an aluminum alloy material, and the negative explosion-proof valve 511b may be connected with the negative cap 510b in an integrally formed manner. The negative explosion-proof valve 511b may take a circular, oval, or other shape, and a protective sheet may be covered over the negative explosion-proof valve 511 b.

In actual implementation, when the internal pressure of the battery can is smaller than the explosion value set by the negative explosion-proof valve 511b, hot gas flows from the side with high pressure to the side with low pressure, gas is discharged outwards through the negative explosion-proof valve 511b, and when the internal pressure of the can is smaller than the external pressure, gas enters the inner cavity from the negative explosion-proof valve 511b, so that internal and external air pressure balance is realized.

It should be noted that, the explosion-proof valve 511 needs to be provided with a protection member made of plastic or other materials inside the battery cell, and occupies a certain internal space of the battery cell. The battery core leads out the pole columns 512 at two sides, plastic parts, a protection bracket and the like are required to be arranged below the cover plate 510, and a certain space is occupied, so that the explosion-proof valve 511 is arranged on the cover plate assemblies 500 at two sides, and the internal space of the battery core is not wasted.

As shown in fig. 6, in this embodiment of the present application, if the battery core is thermally out of control, the hot air may reach the designated location through the shorter pressure release path by setting two explosion-proof valves 511, which can effectively shorten the path of pressure release transmission, and guide the pressure to burst at the position of the explosion-proof valve 511, thereby effectively reducing the safety risk.

It should be noted that the explosion-proof valves 511 may be arranged in a mirror symmetry manner, in which positions of the explosion-proof valves 511 at two ends correspond to each other, and positions of the liquid injection holes 514 at two ends correspond to each other, or in a center symmetry manner, in which positions of the explosion-proof valves 511 at one end correspond to the liquid injection holes 514 at the other end.

In this embodiment of the application, the positive explosion-proof valve 511a and the negative explosion-proof valve 511b are arranged in a mirror symmetry manner, that is, are all disposed at the first end, and the mirror symmetry arrangement can enable two ends of the explosion-proof valve 511 and the liquid injection hole 514 to correspond to each other, so that the internal space layout of the battery core is reasonable and flexible.

As shown in fig. 4, the positive cover plate assembly 500a may further include a positive fill port 514a. The positive fluid injection hole 514a is a small hole formed in the middle of a circular groove at the first end (left end in fig. 4) of the positive cover plate assembly 500a, and a hole cover for blocking the hole may be included above the positive fluid injection hole 514a, and the hole cover may be an aluminum cap, and may be circular or other shapes. In practical implementation, electrolyte can be injected through the positive electrode liquid injection hole 514a, gas generated in the processes of pre-charging, aging and the like can be discharged from the positive electrode liquid injection hole 514a, and after all electrolyte required by the battery is injected, the positive electrode liquid injection hole 514a can be plugged by a rubber plug and sealed by an aluminum cap by welding.

As shown in fig. 5, the negative cap assembly 500b may further include a negative fill port 514b. The anode liquid injection hole 514b is a small hole formed in the middle of a circular groove at the first end (left end in fig. 5) of the anode cover plate assembly 500b, a hole cover for blocking the hole may be included above the anode liquid injection hole 514b, and the hole cover may be an aluminum cap, and may be circular or other shapes. In practical implementation, electrolyte can be injected through the anode liquid injection hole 514b, and gas generated in the processes of pre-charging, aging and the like can be discharged from the anode liquid injection hole 514b, and after all electrolyte required by the battery is injected, the anode liquid injection hole 514b can be plugged by a rubber plug and sealed by an aluminum cap through welding.

According to the battery cell provided by the embodiment of the application, the explosion-proof valves 511 are arranged on the two sides of the plurality of pole columns 512 in parallel, so that the energy density can be improved under the condition of ensuring the current intensity, and the safety of the battery cell can be improved under the condition of not affecting the volume utilization rate.

In some embodiments, as shown in fig. 1-2, the battery cell provided in the embodiments of the present application has a length L, a height H, and a thickness T, which satisfy the following requirements: l is less than or equal to 500mm and less than or equal to 620mm, H is less than or equal to 70mm and less than or equal to 130mm, T is less than or equal to 14mm and less than or equal to 25mm. For example, in some embodiments, the specific dimensions of the cell are: l=58mm, h=80 mm, t=20 mm. In the embodiment of the application, the specific dimensions of the battery cell are as follows: l=600 mm, h=112mm, t=15.5 mm.

In practical implementation, the stacked poles 300 of the plurality of pole 300 units can output strong current for charging, the thinner case reduces the volume utilization rate, and even if the battery cells are out of control, the hot air can be discharged from the explosion-proof valves 511 at both sides.

The above-mentioned design of thinning increases the number of stacked layers of the pole pieces 300, thereby increasing the energy volume density, and on the premise of reducing the volume, the allowable current intensity can be increased by combining the structural design of the multi-pole column 512, and the harm of thermal runaway can be reduced by combining the structural design of the two-end explosion-proof valve 511.

In some embodiments, as shown in fig. 7, the cover plate assembly 500 may further include: the cap plate 510, the first insulator 520, and the current collector protection bracket 530.

The cover plate 510 is arranged at two sides of the hollow shell, the cover plate 510 can be sealed and fixed with the pole column 512 in a riveting or riveting and welding combined mode, the explosion-proof valve 511 is arranged on the cover plate 510 for preventing thermal runaway, the liquid injection hole 514 is arranged on the cover plate 510 for liquid injection sampling, and the cover plate 510 seals the hollowed-out shell 100 to protect the internal pole core 300 or other parts.

The first insulating member 520 is installed on one side of the cover plate 510 near the pole core 300, the first insulating member 520 may be made of rubber, plastic or other insulating materials, and a first pressure release hole 521 is provided at a position opposite to the explosion-proof valve 511, the pressure release is facilitated by the first pressure release hole 521 under the premise of ensuring structural strength, and the first pressure release hole 521 plays a role in protecting the explosion-proof valve 511, so as to prevent the explosion-proof valve 511 from being physically failed due to possible foreign matters in the battery core.

As shown in fig. 7, the first insulating member 520 may further include a second avoidance hole 524, where the second avoidance hole 524 is a hollow hole disposed near the middle of the first insulating member 520, and the second avoidance hole 524 may be a circle, square, or other shape corresponding to the pole 512, and the second avoidance hole 524 may be a plurality of second avoidance holes 524 corresponding to the pole 512, for example, in some embodiments, three second avoidance holes 524 of the first insulating member 520.

The current collector protective bracket 530 may be used to clamp the current collector, in other words, the current collector is easy to vibrate during assembly and welding to cause the welding rod to be broken, and the current collector protective bracket 530 may apply a certain clamping force to the current collector, thereby reducing the vibration force of the current collector.

The current collector protection bracket 530 is mounted to a side of the first insulating member 520 adjacent to the pole core 300, and is connected to the first insulating member 520. As shown in fig. 7, the first insulating member 520 may be provided with first clamping members 527, the first clamping members 527 are located on one side of the first insulating member 520 close to the current collector protecting support 530, the first clamping members 527 may be provided with four, and may be provided on two sides of the first insulating member close to the clamping wall of the current collector protecting support 530, one side may be provided with two, and the first clamping members 527 may be in a cantilever hook shape with a bending radian smaller than 90 °.

The current collector protection bracket 530 may be provided with a second clamping member 535, and the second clamping member 535 of the current collector protection bracket 530 is connected with the first clamping member 527 of the first insulating member 520, so that the mutual clamping of the current collector protection bracket 530 and the first insulating member 520 may be achieved.

As shown in fig. 7, the current collector protection bracket 530 may further include a second pressure relief hole 539, where the second pressure relief hole 539 may be disposed at an end of the current collector protection bracket 530 near the explosion-proof valve 511 and corresponds to the position of the first pressure relief hole 521 of the first insulating member 520. The second pressure relief holes 539 improve the pressure relief efficiency on the premise of ensuring the strength of the structure.

As shown in fig. 7, the current collector protection bracket 530 may include a clamping arm 531 and a connection portion 532, the clamping arm 531 may be disposed at a middle portion of the current collector protection bracket 530, and the connection portion 532 may be disposed at both ends of the current collector protection bracket 530. In practical implementation, the pole 512 may pass through the clamping area of the current collector protecting support 530, and the clamping arms 531 of the current collector protecting support 530 may tightly fix the current collector, so that the current collector does not vibrate under the clamping of the current collector protecting support 530 during the assembly welding process of the housing 100 and the cover plate assembly 500, thereby reducing the risk of tearing the welding rod due to vibration of the current collector.

Specific parts and details of the current collector protective support 530 will be described in detail later, and will not be described in detail herein.

In some embodiments, as shown in fig. 7, the first insulating member 520 is provided with a first weakening structure 523 at a position opposite to the explosion proof valve 511, and the first weakening structure 523 is disposed around the first pressure relief hole 521. The first weakening structures 523 may be hollow holes or grooves, and the number of the first weakening structures 523 may be plural.

In practical implementation, when thermal runaway in the battery cell is serious, a large amount of hot gas is emitted in a short time, the gas needs to pass through the second pressure release hole 539 and the first pressure release hole 521 to reach the explosion-proof valve 511 at two ends of the battery cell, and the limited area of the second pressure release hole 539 and the first pressure release hole 521 also reduces the heat dissipation efficiency.

The first weakening structure 523 makes the periphery of the pressure relief hole easily be broken by a large amount of hot air through the peripheral structure of the weakening pressure relief hole when a large amount of gas passes through the first pressure relief hole 521, thereby increasing the area of the pressure relief hole, accelerating the pressure relief rate, reducing the risk of explosion and guaranteeing the safety of the battery cell.

In some embodiments, as shown in fig. 7, the first insulating member 520 is provided with a stepped first groove 522 at a side facing the cap plate 510, and a portion of the explosion proof valve 511 protruding from the cap plate 510 is located in the first groove 522. The first groove 522 may be a circular stepped groove, a square stepped groove, or other shapes.

After the explosion proof valve 511 is connected to the cap plate 510, a protruding portion is left at a side close to the first insulating member 520, and the first groove 522 of the first insulating member 520 is coupled to the portion of the explosion proof valve 511 protruding from the cap plate 510, i.e., the shape of the first groove 522 corresponds to the shape of the explosion proof valve 511. The provision of the first groove 522 also enhances the durability of the explosion-proof valve 511 while securing the tight connection of the first insulator 520 and the current collector protective bracket 530.

In some embodiments, as shown in fig. 7, the first insulating member 520 is provided with a first weakening structure 523 at a position opposite to the explosion-proof valve 511, where the first weakening structure 523 includes a plurality of hollow holes, and at least part of the hollow holes are located on a plurality of stepped surfaces of the first groove 522. Any of the plurality of stepped surfaces of the first recess 522 may have different stiffness, and when the first recess 522 is crushed by hot air, the stepped surfaces having different stiffness may also result in different degrees of crushing.

In practical implementation, part of the hollow holes of the first weakening structure 523 span across a plurality of stepped surfaces, namely, the first weakening structure 523 weakens a plurality of stepped surfaces of the first groove 522 at the same time, when thermal runaway is serious, hot gas easily shakes all the stepped surfaces of the first groove 522 under the help of the first weakening structure 523, so that the gas flow area is increased, and the safety is ensured.

It should be noted that the first pressure relief hole 521, the first groove 522 and the first weakening structure 523 of the first insulating member 520 may be arranged in a central symmetry manner, that is, the end of the first insulating member 520 opposite to the first pressure relief hole 521 is also provided with a hole with the same shape, the end of the first insulating member 520 opposite to the first groove 522 is also provided with a groove with the same shape, and the end of the first insulating member 520 opposite to the first weakening structure 523 is also provided with a structure with the same shape, so that a fool-proof design may be formed and assembly is convenient.

In some embodiments, as shown in fig. 7, the current collector protective bracket 530 further includes reinforcing ribs 534, the reinforcing ribs 534 protruding inward are located at ends of the clamping area of the current collector protective bracket 530, the reinforcing ribs 534 may be integrally formed with the current collector protective bracket 530, and the reinforcing ribs 534 may be respectively disposed at 4 ends of the clamping area of the current collector protective bracket 530.

The reinforcing ribs 534 can increase the clamping force of the current collector protective bracket 530 on the current collector, reduce the vibration of the current collector, and the reinforcing ribs 534 arranged at the end parts also improve the strength and rigidity of the current collector protective bracket 530.

The second pressure relief holes 539 may be disposed on the reinforcing ribs 534, the second pressure relief holes 539 may be rectangular or have other shapes, and a plurality of second pressure relief holes 539 may be disposed on the corresponding reinforcing ribs 534.

In actual implementation, the high-pressure gas in the case passes through the second pressure relief hole 539 of the current collector protecting support 530, reaches the first insulator 520, passes through the first pressure relief hole 521 of the first insulator 520, reaches the cover plate 510, and finally is led out of the explosion-proof valve 511 of the cover plate 510, which ensures smooth circulation of the high-pressure gas.

It should be noted that the second pressure relief holes 539 of the current collector protecting support 530 may be arranged symmetrically, that is, the end of the current collector protecting support 530 opposite to the second pressure relief holes 539 is also provided with holes with the same shape, so that a foolproof design may be formed, which is convenient for assembly.

In some embodiments, as shown in fig. 7, the cover plate assembly 500 further includes: a platen 560.

The pressing plate 560 is installed on one side of the cover plate 510 away from the pole core 300, the pressing plate 560 may be made of aluminum, steel or other materials, the unclosed lower edge of the pressing plate 560 is welded on the cover plate 510, as shown in fig. 7, and the pressing plate 560 further includes a first avoiding hole 564.

The first avoidance hole 564 is a hollow hole disposed in the cover plate 510 near the middle, where the first avoidance hole 564 may be a circle, square, or other shape corresponding to the pole 512, and the first avoidance hole 564 may be a plurality of first avoidance holes 564 corresponding to the pole 512, for example, in some embodiments, three first avoidance holes 564 of the cover plate 510. The second avoidance holes 524 of the first insulator are equal to the first avoidance holes 564 of the cover plate 510 in number, and the positions of the two holes are in one-to-one correspondence.

The first insulating member 520 may be provided with a plurality of second avoidance holes 524, the pole 512 may penetrate through the second avoidance holes 524 and may extend into the first avoidance holes 564, the cover plate 510 is provided with the liquid injection holes 514, the explosion-proof valve 511 and the liquid injection holes 514 are located at two sides of the pressure plate 560, where the height of the pressure plate 560 may be consistent with the height of the liquid injection holes 514, so as to facilitate welding when the system is grouped.

It can be appreciated that the first avoidance hole 564 may enable two or more poles 512 to be connected with each other through the pressing plate 560, so as to ensure the overcurrent capability of the poles 512 during high-rate charging and discharging, and reduce the temperature rise of the poles 512 during charging and discharging.

The application also discloses a battery module, this battery module includes: the battery cells are any one of the battery cells.

The battery module can be formed by combining a plurality of battery cells in a serial-parallel connection mode and adding the protection circuit board and the shell 100, the battery cells can be packaged together by using the same shell 100 frame, and then the battery cells can be connected with the outside through a uniform boundary, wherein the battery cells represent more than 2 or more than 2. The battery module composed of a plurality of electric cores can directly provide electric energy for related equipment.

The battery module of this application embodiment through using above-mentioned electric core, when guaranteeing self energy density, still can reduce the harm that thermal runaway brought, improves the safety in utilization of module, strengthens its overcurrent capacity.

The application also discloses a battery package, this battery package includes: the battery cells are any one of the battery cells.

The battery pack can be manufactured by directly assembling the battery pack through the battery cells, or can be manufactured by assembling the battery pack after the battery cells form the battery module.

The following describes embodiments of the present application in detail from two different implementation angles, respectively.

First, the cell directly assembles the battery pack.

In this embodiment, a plurality of cells are arranged together, directly integrated into a complete battery pack by specific technical processing means, and the battery pack is integrated onto the device floor as part of the relevant device structure.

In practical implementation, the battery pack structure is greatly simplified, the battery pack capacity with the same size is expanded by using the space to be released, the quality of the battery pack is lightened, the energy density of the battery is effectively improved, and the cost is reduced.

And secondly, the battery cells form a battery module and then are assembled into a battery pack.

In this embodiment, a plurality of the above-mentioned battery cells are combined in a serial-parallel manner and added with a protection circuit board and a housing 100 to form a battery module, and the plurality of battery cells may be packaged together by using the same housing 100 frame and then may be connected with the outside through a uniform boundary. Wherein, a plurality of battery modules represent 2 or more than 2, and a plurality of battery modules can form a battery pack after being controlled or managed by a battery management system and a thermal management system.

In actual implementation, the battery module may provide protection even if the battery pack case 100 is damaged; the battery module is damaged, and the battery core body also has self-protection capability. The assembly mode realizes the exquisite and safe structure of the battery pack through microscopic composition macroscopic, and each module is provided with an independent shell protection and control unit, so that the battery can be controlled and thermally managed conveniently.

The application also discloses a vehicle, this vehicle includes: and a battery pack, which is any one of the above battery packs.

The above-described battery pack may be mounted on a chassis of a vehicle to supply power during running and running of the vehicle, and in actual implementation, when an engine of the vehicle is started, the battery pack may supply a large amount of current in a short time to enable the vehicle to be started and run normally.

The vehicle provided with the battery pack has high-power bearing capacity, is convenient to start and accelerate, and improves the charge and discharge capacity and the cruising ability; meanwhile, the safety performance can be improved.

The application also discloses another cell.

A cell according to an embodiment of the present application is described below with reference to fig. 1-10.

In some embodiments, as shown in fig. 1-2, the cell includes: the housing 100, the pole piece 300 (not shown in fig. 1 and 2 because the pole piece 300 is wrapped inside the housing 100), the side support plate 440 (not shown in fig. 1 and 2 because the side support plate 440 is wrapped inside the housing 100), and the cover plate assembly 500.

An example in which the pole core 300 is formed by winding is described below.

Placing a layer of negative electrode plate 320 on the diaphragm 330, placing a layer of diaphragm 330 on the negative electrode plate 320, placing a positive electrode plate 310 on the diaphragm 330 on the negative electrode plate 320, placing a layer of diaphragm 330 on the positive electrode plate 310, rolling the minimum electrode core unit into a layer-by-layer wrapped roll core shape through the rotation of a roll needle, wherein the roll core can be cylindrical or elliptic cylindrical, and the roll needle can be prismatic, elliptic or circular.

The cover plate assembly 500 and the housing 100 can be connected by laser welding, and the tab of the pole core 300 can extend out of the battery core through the cover plate assembly 500, and the cover plate assembly 500 can seal the pole core 300 and the side supporting plate 440 in the housing 100 of the battery core, so that the pole core 300 is protected.

As shown in fig. 7, the cap plate assembly 500 may include a fill port 514. The liquid injection hole 514 is a small hole formed in the middle of a circular groove at the first end (left end in fig. 7) of the cover plate assembly 500, and a hole cover for blocking the hole opening may be included above the liquid injection hole 514, and the hole cover may be an aluminum cap, and may be circular, square or other shapes.

In practical implementation, electrolyte can be injected through the positive electrode electrolyte injection hole 514a, and gas generated in the processes of pre-charging, aging and the like can be discharged from the electrolyte injection hole 514, and after all electrolyte required by the battery is injected, the electrolyte injection hole 514 can be plugged by a rubber plug and sealed by an aluminum cap by welding.

The side support plate 440 is disposed between the welding seam of the pole core 300 and the housing 100, and the side support plate 440 may be made of plastic materials, such as PP (polypropylene), PC (polycarbonate), PPs (polyphenylene sulfide), PEI (polyetherimide), PFA (copolymer of a small amount of perfluoropropyl perfluorovinyl ether and polytetrafluoroethylene), or fluororubber. The shape of the side support plate 440 may be an elongated shape. In the related art, during the process of assembling the pole core 300 into the shell, the pole core 300 is easily knocked with the shell, so that the appearance of the pole core 300 is damaged, when the knocks are serious, physical contact short circuit between the anode and the cathode occurs in the pole core 300, and the shell 100 is formed by processing technologies such as stamping and stretching, high-frequency welding, friction stir welding and the like, and the processing technologies all cause residual metal chips or welding burrs in the shell, so that when the pole core 300 is assembled into the shell, the residual metal chips or the welding burrs are easily caused to cause the physical contact short circuit between the anode and the cathode in the pole core 300.

In actual implementation, the side of the pole core 300 may be connected to the side support plate 440, the side support plate 440 corresponds to the weld side of the case 100, the pole core 300 assembled with the side support plate 440 is inserted into the case 100, and in this process, the side support plate 440 may replace the pole core 300 to be in frictional contact with the weld side of the case 100, thereby avoiding the pole core 300 from being in frictional contact with the sharp substance and the residual substance on the weld side.

The embodiment of the application effectively avoids the damage of the structure of the pole core 300 through the arrangement of the side supporting plate 440, and simultaneously reduces the risk of thermal runaway caused by the short circuit of the positive electrode and the negative electrode in the pole core 300, thereby ensuring the normal operation of the battery core.

In some embodiments, as shown in fig. 14, the cell further comprises: a protective film 700.

The protective film 700 is coated outside the pole core 300, and the protective film 700 is disposed in the housing 100, the side support plate 440 is connected to the pole core 300, and the protective film 700 is fixedly connected to the side support plate 440. The connection mode of the protective film 700 and the side support 440 may be a hot melt fixing connection or other connection modes. The shape of the protective film 700 may be rectangular or other shapes. The protective film 700 may be made of an insulating material such as polyimide, polyethylene, polytetrafluoroethylene, or other materials.

In the related art, the inventor of the present application found that, in practice, the protective film 700 plays a role of isolating the tiny substances remained in the case 100, and in the case that the weld side of the case 100 has barbs, the protective film 700 is easily punctured, so that the damage of the pole core 300 is serious and the positive and negative poles are short-circuited.

The mode that the protection film 700 is combined with the side supporting plate 440 protects the pole core 300 from being interfered by barbs and metal scraps on the welding line side of the shell 100 to the greatest extent, and the mode that the protection film 700 coats the pole core 300 also enables the whole pole core 300 to be firmer. The plurality of minimum pole core units inside the pole core 300 can also form a stable and reliable integral structure through the wrapping of the protective film 700.

In some embodiments, as shown in fig. 8 and 14, the protective film 700 is provided with a protective film second positioning structure 720, the side support plate 440 is provided with a side support plate positioning structure 441, and the side support plate positioning structure 441 is mated with the protective film second positioning structure 720.

The second positioning structure 720 of the protective film may be disposed on the long sides of the protective film 700, and two sides may be disposed respectively, for example, in some embodiments, two long sides of the protective film 700 are disposed respectively 2. The protective film second positioning structure 720 may be a positioning hole, a positioning post, or other positioning structure, and the protective film second positioning structure 720 may be circular, square, or other shape, for example, in some embodiments, the protective film second positioning structure 720 is a circular through hole.

The side blade positioning structure 441 may be provided in plurality on the side blade 440, such as in some embodiments, the side blade positioning structure 441 may be 2. The side blade positioning structure 441 may also be a positioning post, or other positioning structure, and the side blade positioning structure 441 may be circular, square, waist-shaped, or other shape, such as, in some embodiments, the side blade positioning structure 441 is a circular through hole.

It should be noted that, the number of the side supporting plate positioning structures 441 and the number of the protecting film second positioning structures 720 need to be in one-to-one correspondence.

In practical implementation, the second positioning structure 720 of the protective film may be first positioned with the positioning structure 441 of the side supporting plate, and after the protective film 700 wraps the pole core 300 and winds to a certain number of turns, the second positioning structure 720 of the protective film may be second positioned with the positioning structure 441 of the side supporting plate, and finally fixedly connected by means of hot melting. Wherein, a certain number of turns represents one turn or more than one turn. It should be noted that, the welding position of the hot melt may be defined at the positioning structure, or may be defined at other positions of the pole piece 300 after the side supporting plate 440 is overlapped with the insulating film.

It can be appreciated that, by matching the side support plate positioning structure 441 with the protective film second positioning structure 720, the connection among the pole core 300, the side support plate 440 and the protective film 700 is more compact, and the side support plate 440 and the protective film 700 are used as the first layer protection arrangement and the second layer protection arrangement of the pole core 300, so that the protection effect on the pole core 300 is enhanced after the pole core 300 is integrated with the pole core 300.

In some embodiments, as shown in fig. 7-9, the clamping area of the current collector protective bracket 530 clamps the current collector of the pole core 300, and the side support plate 440 is connected to the current collector protective bracket 530.

The current collector protection bracket 530 may include a clamping arm 531 and a connection portion 532, the clamping arm 531 may be disposed at a middle portion of the current collector protection bracket 530, and the connection portion 532 may be disposed at both ends of the current collector protection bracket 530. In practical implementation, the current collector can pass through the clamping area of the current collector protection support 530, and the clamping arms 531 of the current collector protection support 530 can tightly fix the current collector, so that the current collector is not vibrated under the clamping of the current collector protection support 530 in the process of assembling and welding the shell 100 and the cover plate assembly 500, and the risk of tearing the welding rod due to vibration of the current collector is reduced.

The above-mentioned pole core 300 is provided with the side supporting plate 440 structure, the side supporting plate 440 and the current collector protecting support 530 can be fixed by specific size and shape, the side supporting plate 440 can be tightly combined with the pole core 300 and the protecting film 700 into a whole, and then can be fixedly connected with the current collector protecting support 530, the possibility of the displacement of the battery pole core 300 in the battery is reduced by the connection mode, and the stability of normal charge and discharge of the pole core 300 under severe working conditions such as jolt and vibration is increased.

In some embodiments, as shown in fig. 9-11, the current collector protective bracket 530 includes: a first bracket 530a and a second bracket 530b. The first support 530a and the second support 530b are oppositely arranged and detachably connected, the clamping area is located between the first support 530a and the second support 530b, the first support 530a and the second support 530b both comprise support limiting portions 536, the end portion of the side support plate 440 is provided with a side support plate limiting portion 446, and the support limiting portions 536 of the first support 530a and the support limiting portions 536 of the second support 530b are clamped with the side support plate limiting portions 446.

The support limit portion 536 may be disposed at an end portion of the current collector protection support 530, the first support 530a and the second support 530b may each be provided with a limit portion, the shape of the support limit portion 536 of the first support 530a may be a shape of an upper end straight line lower end semicircle line, and the support limit portions 536 of the first support 530a and the support limit portion 536 of the second support 530b may be combined into a complete limit structure.

It can be appreciated that the split design of the current collector protective bracket 530 has reasonable split structure, and the arrangement of the first bracket 530a and the second bracket 530b improves the flexibility of the current collector protective bracket 530, so that the structure is more convenient for manufacturing and forming while being rich in layers; the side support plate limiting portion 446 is connected with the support limiting portion 536 in a coupling manner, so that the side support plate 440 and the current collector protecting support 530 can be fixedly connected, and meanwhile, the side support plate 440 and the current collector protecting support 530 are connected more practically and flexibly through the smart design of the limiting portion with a specific shape, so that the installation and the disassembly are facilitated.

It should be noted that, in the case where one welding line is left on the casing 100, the current collector protecting support 530 needs to be connected to only one side supporting plate 440, and in the case where two welding lines are left on the casing 100, two ends of the current collector protecting support 530 need to be connected to two side supporting plates 440, respectively.

In some embodiments, as shown in fig. 15-16, the outside of the current collector protection support 530 is provided with a support positioning structure 533, and the protection film 700 is provided with a protection film first positioning structure 710, and the support positioning structure 533 is mated with the protection film first positioning structure 710.

The support positioning structure 533 of the current collector protecting support 530 may be disposed on the clamping arm 531 of the current collector protecting support 530, and the support positioning structure 533 may be disposed in plurality, for example, in some embodiments, 2 support positioning structures 533 are disposed on the first support 530a of the current collector protecting support 530, and 2 support positioning structures 533 are also disposed on the second support 530b of the current collector protecting support 530. The support positioning structure 533 may be a positioning post, a positioning hole, or other positioning structure, and the shape of the support positioning structure 533 may be circular, square, or other shape, such as in some embodiments the support positioning structure 533 is a circular positioning post.

The protective film first positioning structure 710 may be disposed at the short sides of the protective film 700, and the two sides may be disposed in plurality, respectively, such as 4 sides of the protective film 700, respectively, in some embodiments. The protective film first positioning structure 710 may be a positioning hole, a positioning post, or other positioning structure, and the protective film first positioning structure 710 may be circular, square, or other shape, for example, in some embodiments, the protective film first positioning structure 710 is a circular through hole.

It should be noted that the number of the support positioning structures 533 and the number of the protection film first positioning structures 710 need to be in one-to-one correspondence.

In practical implementation, the support positioning structure 533 of the first support 530a performs first positioning with the first positioning structure 710 of the protective film, the short side of the protective film 700 may encircle along a circle of the current collector protective support 530, and during the process of encircling the circle, the support positioning structure 533 of the second support 530b performs second positioning with the first positioning structure 710 of the protective film, and finally is fixed by hot melting. Wherein the protective film 700 may be wound more than once.

The current collector protection support 530 is connected with the protection film 700 in a positioning manner, so that the specific position of the protection film 700 is fixed, the accuracy of a processing technology is ensured, meanwhile, the current collector protection support 530 fixes the position of the pole core 300 through the protection film 700, the displacement of the pole core 300 structure in a shell is reduced, the uniformity and the stability of the whole structure are improved, and the possibility of charge-discharge failure and thermal runaway of the battery core is reduced.

In some embodiments, as shown in fig. 8 and 14, the side fascia 440 is located outside the protective film 700; alternatively, the protective film 700 covers the pole core 300 and the side support 440.

First, the side support plate 440 is located outside the protective film 700.

In this embodiment, the protective film 700 may be wrapped around the pole core 300, then the side supporting plate 440 is placed on the side of the pole core 300 for several times for positioning, and finally the side supporting plate is fixed by hot melting. The protective film 700 is located between the side supporting plate 440 and the pole core 300, and the protective film first positioning structure 710 located at the inner side may be a positioning groove in the process of positioning the side supporting plate 440 and the protective film 700, and the positioning groove may prevent burning out the pole core 300 when in hot melting.

In the above implementation manner, the side support plate 440 may prevent the integrity of the protective film 700 from being damaged at the weld joint on one side or both sides, and also plays a role in isolating and protecting the weld joint sides of the protective film 700 and the housing 100 while protecting the stability of the pole core 300.

Second, the protective film 700 is coated outside the core 300 and the side support 440.

In this embodiment, the side support plate 440 may be first assembled with the pole core 300, then wrapped with the protective film 700, positioned several times, and finally fixed by hot melting. The side support plate 440 may be a positioning groove between the pole core 300 and the protective film 700, and the side support plate positioning structure 441 located at the inner side may be a positioning groove during positioning of the side support plate 440 and the protective film 700, where the positioning groove may prevent burning out the pole core 300 during hot melting.

Through the implementation manner, other structures are not arranged between the pole core 300 and the side supporting plate 440, and the cladding of the protective film 700 enables the pole core 300 and the side supporting plate 440 to be fixed into a coordinated and unified whole, so that the firmness between the pole core 300 and the side supporting plate 440 is improved.

In this embodiment, after the side supporting plate 440 and the protective film 700 are welded and fixed, other auxiliary materials, such as insulating tape, may be used to fix the pole core 300 again, so that the side supporting plate 440, the protective film 700 and the pole core 300 are fixed into an integral structure.

In some embodiments, as shown in fig. 1-2, there are 2 cover plate assemblies 500, two cover plate assemblies 500 are respectively installed at both ends of the housing 100, and both cover plate assemblies 500 include explosion-proof valves 511.

In this embodiment, the assembly form and structure of the explosion-proof valve 511 may be referred to the description of the above examples, and will not be repeated herein.

The battery module can be formed by combining a plurality of battery cells in a serial-parallel connection mode and adding the protection circuit board and the shell 100, and the battery cells can be packaged together by using the same shell 100 frame and then can be connected with the outside through a uniform boundary. The battery modules which are composed of a plurality of battery cores can directly provide electric energy for related equipment, wherein the plurality of battery modules represent 2 or more than 2 battery cores.

The battery module of this application embodiment has increased the stability of normal charge and discharge of power battery under abominable operating mode such as jolt, vibration through using above-mentioned electric core, has reduced battery charge and discharge inefficacy and thermal runaway's possibility.

The application also discloses a battery package, this battery package includes: the battery cells are any one of the battery cells. The battery pack can be manufactured by directly assembling the battery pack through the battery cells, or can be manufactured by assembling the battery pack after the battery cells form the battery module.

First, the cell directly assembles the battery pack.

In this embodiment, a plurality of the above-mentioned electric cells are combined in a serial-parallel connection manner and added with a protection circuit board and a housing 100 to form a battery module, and the plurality of electric cells can be packaged together by using the same housing 100 frame, and then can be connected with the outside through a unified boundary, wherein the plurality of electric cells represents 2 or more than 2. The battery pack can be formed by a plurality of battery modules after being controlled or managed by the battery management system and the thermal management system.

The vehicle provided with the battery pack has high-power bearing capacity, rapid charge and deep discharge, and improves the cruising ability; and at the same time, the service life of the vehicle is prolonged.

The present application also discloses a current collector protective bracket 530.

A current collector protective bracket 530 according to an embodiment of the present application is described below with reference to fig. 7, 10-12, and 15-16.

In some embodiments, as shown in fig. 12 to 13, the inner side of the collector protective bracket 530 defines a clamping area for clamping the current collector of the pole core 300; the outside of the current collector protection bracket 530 is provided with a bracket positioning structure 533 for cooperation with the protection film 700 of the pole core 300.

The clamping area of the current collector protection support 530 is used for clamping the current collector, in practical implementation, the current collector can pass through the clamping area of the current collector protection support 530, and the clamping arms 531 of the current collector protection support 530 can tightly fix the current collector, and in the process of assembling and welding the shell 100 and the cover plate assembly 500, the current collector does not vibrate under the clamping of the current collector protection support 530, so that the risk of tearing welding rods due to vibration of the current collector is reduced.

The support positioning structure 533 may be disposed outside of the current collector protective support 530, the support positioning structure 533 may be a positioning post, a positioning hole, or other positioning structure, and the shape of the support positioning structure 533 may be a circle, a square, a triangle, a polygon, or other shape, such as in some embodiments, the support positioning structure 533 is a circular positioning post.

The support positioning structure 533 may be matched with the protective film 700 of the pole core 300, the protective film 700 may be provided with a protective film first positioning structure 710 as well, and the support positioning structure 533 and the protective film first positioning structure 710 may be matched, thereby completing the connection of the current collector protective support 530 and the protective film 700.

In the related art, the protective film 700 and the current collector protective bracket 530 have no positioning parts, which causes the distance between the protective film 700 and the cover plate 510 to be not fixed, and if the distance between the protective film 700 and the cover plate 510 is too small, it is easy to cause a burst spot abnormality to occur when the cover is welded.

In the embodiment of the application, the protective film 700 and the current collector protective bracket 530 are mutually matched through the arrangement of the positioning structure, so that the purpose of limiting the distance between the protective film 700 and the cover plate 510 is achieved, and the protective film 700 wraps the pole core 300, so that the connection between the current collector protective bracket 530 and the pole core 300 is firmer and more reliable.

In some embodiments, as shown in fig. 11-13, a first support 530a of the current collector protecting support 530 is disposed opposite to and detachably connected to a second support 530b, a clamping region is located between the first support 530a and the second support 530b, and at least one of a side of the first support 530a facing away from the second support 530b and a side of the second support 530b facing away from the first support 530a is provided with a support positioning structure 533.

The current collector protection support 530 is designed in a split type, the current collector protection support 530 may be divided into a first support 530a and a second support 530b, the first support 530a and the second support 530b are symmetrical to each other, and the first support 530a and the second support 530b are disposed opposite to each other. The first and

second brackets

530a and 530b may be connected to each other, and the connection thereof may be non-permanently and flexibly connected, i.e., the connection structure of the first and

second brackets

530a and 530b may be disassembled and assembled. After the first support 530a and the second support 530b are assembled, the middle region surrounded by the first support 530a and the second support 530b may form a clamping region of the current collector protection support 530, and the clamping region may be used to clamp the current collector.

The split design of the current collector protective support 530 has the advantages that the structure is reasonably split, the flexibility of the current collector protective support 530 is improved due to the arrangement of the first support 530a and the second support 530b, and the structure is more convenient to manufacture and form while rich in layers.

The side of the first support 530a facing away from the second support 530b may be provided with a support positioning structure 533, while the side of the second support 530b facing away from the first support 530a is not provided with a support positioning structure 533, and the first positioning structure of the protective film 700 may be matched with the support positioning structure 533 of the first support 530 a; the side of the second support 530b facing away from the first support 530a may be provided with a support positioning structure 533, while the side of the first support 530a facing away from the second support 530b is not provided with a support positioning structure 533, and the first positioning structure of the protective film 700 may be matched with the support positioning structure 533 of the second support 530 b; or both sides may be provided with the support positioning structure 533 at the same time, at this time, the first positioning structure of the protective film 700 is matched with the support positioning structure 533 of the first support 530a and the support positioning structure 533 of the second support 530b, so that the protective film 700 performs both-side positioning. For example, in the present embodiment, both the first and

second brackets

530a, 530b are provided with the bracket positioning structure 533.

According to the embodiment of the application, the positioning structures are arranged on the two sides of the current collector protective support 530, so that the protective film 700 can be positioned on at least one side of the current collector protective support 530, positioning accuracy is guaranteed, and the operability in the machining process is improved due to multi-position positioning.

In some embodiments, as shown in fig. 11-13, the first leg 530a is provided with a plurality of leg locating structures 533 and the second leg 530b is provided with a plurality of leg locating structures 533.

The above-mentioned support positioning structures 533 may be disposed on the first support 530a, the second support 530b, or both, where a plurality of support positioning structures 533 may be disposed on the first support 530a, where a plurality represents 2 or more, and a plurality of support positioning structures 533 may be disposed on the second support 530b, where a plurality represents 2 or more, for example, in the embodiment of the present application, as shown in fig. 12-13, the first support 530a is provided with 2 support positioning structures 533, and the second support 530b is also provided with 2 support positioning structures 533. It should be noted that the support positioning structure 533 of the first support 530a may correspond to the support positioning structure 533 of the second support 530 b.

The plurality of positioning posts of the first bracket 530a and the second bracket 530b increases the positioning areas of the current collector protective bracket 530 and the protective film 700, more precisely locks the positions between the current collector protective bracket 530 and the protective film 700, and ensures the normal connection and the smooth operation thereof.

In some embodiments, as shown in fig. 11-13, the first and

second brackets

530a, 530b each include: the connection portion 532 at both ends and the grip arm 531 connected between the connection portions 532, the connection portion 532 of the first bracket 530a is detachably connected to the connection portion 532 of the second bracket 530b, and the grip region is located between the grip arm 531 of the first bracket 530a and the grip arm 531 of the second bracket 530 b.

The connection parts 532 may be disposed at both ends of the first bracket 530a, and the connection parts 532 may be disposed at both ends of the second bracket 530b as well, and the connection parts 532 of the first bracket 530a may be connected with the connection parts 532 of the second bracket 530b, and the connection may be non-permanently and flexibly connected, thereby achieving flexible and detachable connection of the first bracket 530a and the second bracket 530 b.

The clamping arm 531 of the first bracket 530a, the clamping arm 531 of the second bracket 530b, the connecting portion 532 of the first bracket 530a, and the connecting portion 532 of the second bracket 530b after the connection may enclose a middle area, which is the clamping area of the current collector protection bracket 530.

The above-mentioned division of the clamping area and the connection area makes the functional partition of the current collector protective bracket 530 clear and easy to see, and improves the structural refinement; the detachable design of the first support 530a and the second support 530b can avoid the defect that the integrated structure is not detachable, and is beneficial to the functional partition of the current collector protection support 530.

In some embodiments, as shown in fig. 11-13, the clamping arm 531 is provided with a lightening hole 540 and the connection 532 is a box-like structure.

The lightening holes 540 may be designed as circles, rectangles, triangles, polygons, or other shapes, for example, in some embodiments the lightening holes 540 are rectangular. The lightening holes 540 may be distributed in different directions, for example, in some embodiments, as shown in fig. 12 to 13, a part of the lightening holes 540 is a rectangular hole with a long side perpendicular to the horizontal direction, and another part is a rectangular hole with a long side parallel to the horizontal direction, and the lightening holes 540 may be provided in a plurality, the plurality representing 2 or more.

The hollowed design of the current collector protective bracket 530 can improve the exhaust effect, lighten the weight of the protective bracket and improve the quality and energy density of the battery; meanwhile, the electrolyte can be filled with the electrolyte to be suffocated, so that the electrolyte can be conveniently filled.

In some embodiments, as shown in fig. 11-13, the connection portion 532 of the first bracket 530a is snap-connected to the connection portion 532 of the second bracket 530 b.

As shown in fig. 11, the first connection portion 532 of the first bracket 530a may be provided with a male snap head 537, the second connection portion 532 of the first bracket 530a may be provided with a female snap head 538, the first connection portion 532 of the second bracket 530b may be provided with a female snap head 538, and the second connection portion 532 of the second bracket may be provided with a male snap head 537. The snap-fit male head 537 may include a plurality of resilient snap-fit tabs distributed circumferentially, and the snap-fit female head 538 may include snap-fit apertures corresponding to the snap-fit tabs.

The male joint 537 of the first bracket 530a is clamped with the female joint 538 of the second bracket 530b, the female joint 538 of the first bracket 530a is clamped with the male joint 537 of the second bracket 530b, and the elastic buckle and the elastic clamping piece are mutually clamped, so that the detachable connection of the first bracket 530a and the second bracket 530b is realized.

The first bracket 530a and the second bracket 530b are connected by a clamping structure, so that reasonable clamping layout and structural design are utilized, the rigidity requirement of the assembly structure is met, and the budget cost is reduced; meanwhile, the design of the elastic pieces of the clamping male head 537 and the clamping female head 538 also plays a role in tight fit and convenient disassembly.

As shown in fig. 11 to 13, the current collector protective bracket 530 further includes: reinforcing ribs 534.

The reinforcing ribs 534 protruding inward are located at the end of the clamping area of the current collector protective bracket 530, and are connected to the connection portions 532 and the clamping arms 531. The reinforcing ribs 534 may be integrally formed with the current collector protective bracket 530, and the reinforcing ribs 534 may be respectively disposed at 4 ends of the clamping area of the current collector protective bracket 530.

The application also discloses another cell.

A cell according to an embodiment of the present application is described below with reference to fig. 1-7 and 14-16.

In some embodiments, as shown in fig. 1-2, the cell includes: the housing 100, the pole piece 300 (not shown in fig. 1 and 2 because the pole piece 300 is wrapped inside the housing 100), the protective film 700 (not shown in fig. 1 and 2 because the protective film 700 is wrapped inside the housing 100), and the cover plate assembly 500.

An example in which the pole core 300 is formed by winding is described below.

As shown in fig. 14, the protective film 700 is coated outside the pole core 300, and the protective film 700 is provided with a protective film first positioning structure 710.

The shape of the protective film 700 may be rectangular or other shapes, and the protective film 700 may be made of an insulating material such as polyimide, polyethylene, polytetrafluoroethylene, or other materials. It should be noted that the two end surfaces of the pole core 300 facing the cover plate assembly 500 are not covered.

As shown in fig. 7, the cap plate assembly 500 is mounted to an end of the case 100 and includes a current collector protection bracket 530, a clamping region of the current collector protection bracket 530 clamps a current collector of the pole core 300, and a bracket positioning structure 533 is engaged with the protection film first positioning structure 710.

In this embodiment, the structure and assembly form of the cover plate assembly 500 may refer to the description of the above embodiments, and will not be repeated herein.

The positioning design of the current collector protective bracket 530 and the protective film 700 solves the problem that the distance between the protective film 700 and the cover plate 510 cannot be determined, avoids the abnormal explosion point of the battery cell during the welding of the cover plate, and improves the safety performance of the battery cell.

The battery module of this application embodiment is through using above-mentioned electric core, when guaranteeing self energy density, can also improve insulating protection structure's insulating effect to and improve its safety in utilization, and the design of independent unit has also played convenient and fast, has practiced thrift the effect of maintenance cost.

First, the cell directly assembles the battery pack.

The vehicle provided with the battery pack can be matched with an engine with larger output power, is convenient to start and accelerate, and improves the charge and discharge capability and the cruising ability; meanwhile, the safety performance can be improved, and the service life can be prolonged.

The terms first, second and the like in the description and in the claims, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged, as appropriate, such that embodiments of the present application may be implemented in sequences other than those illustrated or described herein, and that the objects identified by "first," "second," etc. are generally of a type and not limited to the number of objects, e.g., the first object may be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.

In the description of the present application, it should be understood that the terms "center," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like indicate an orientation or positional relationship based on that shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and thus should not be construed as limiting the present application.

In the description of the present application, the meaning of "plurality" is two or more.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims

1. A current collector protective bracket is characterized in that,

2. The current collector protective bracket of claim 1, comprising:

the device comprises a first support and a second support, wherein the first support and the second support are oppositely arranged and detachably connected, the clamping area is located between the first support and the second support, and at least one of one side, deviating from the second support, of the first support and one side, deviating from the first support, of the second support is provided with a support positioning structure.

3. The current collector protective bracket of claim 2 wherein said first bracket is provided with a plurality of said bracket locating structures and said second bracket is provided with a plurality of said bracket locating structures.

4. The current collector protective bracket of claim 2, wherein the first bracket and the second bracket each comprise: the clamping device comprises connecting parts positioned at two ends and clamping arms connected between the connecting parts, wherein the connecting parts of the first bracket are detachably connected with the connecting parts of the second bracket, and the clamping area is positioned between the clamping arms of the first bracket and the clamping arms of the second bracket.

5. The current collector protective bracket of claim 4, wherein the clamping arms are provided with lightening holes and the connecting portion is a box-like structure.

6. The current collector protective bracket of claim 4, wherein the connection portion of the first bracket is snap-connected to the connection portion of the second bracket.

7. A cell, comprising:

a housing;

the pole core is arranged in the shell;

the protective film is coated outside the pole core and is provided with a protective film first positioning structure;

a cover plate assembly mounted to an end of the housing and comprising a current collector protective bracket as claimed in any one of claims 1 to 6, the clamping region of the current collector protective bracket clamping the current collector of the pole core, and the bracket locating structure cooperating with the protective film first locating structure.

8. The cell of claim 7, wherein the number of cover plate assemblies is two, the two cover plate assemblies are respectively mounted at two ends of the housing, and the two cover plate assemblies each comprise an explosion-proof valve.

9. A battery pack, comprising: a plurality of cells according to claim 7 or 8.

10. A vehicle, characterized by comprising: the battery pack of claim 9.