CN220382160U - Battery core supporting plate, battery unit, battery and electricity utilization device - Google Patents

Abstract

The embodiment of the application provides a battery core supporting plate, a battery monomer, a battery and an electricity utilization device, and belongs to the technical field of batteries. The cell support plate comprises: the first supporting plate is provided with a plurality of through holes; the first support plate is installed on the second support plate, a cavity is defined jointly, the through holes are communicated with the cavity, and a channel communicated with the cavity is formed in the side wall of the cavity. The electrolyte can be infiltrated upwards along the through holes by the electrolyte through the plurality of through holes arranged on the top wall of the cavity, the infiltration is more uniform through the plurality of through holes, the infiltration effect is improved, the through holes and the channels are arranged on the side wall of the cavity, so that gas generated when the battery is formed can be discharged through the through holes and the channels, the probability of formation exhaust failure is reduced, carbon can be removed from the anode in the circulation process and can be collected by the cavity of the cell supporting plate, the carbon is removed from the anode and isolated from the shell, the corrosion speed of the shell is reduced, and the service life of the cell is prolonged.

Description

Battery core supporting plate, battery unit, battery and electricity utilization device

Technical Field

The present application relates to the field of battery technology, and more particularly, to a cell support plate, a battery cell, a battery, and an electrical device.

Background

A typical battery is manufactured by filling electrolyte from the top of the battery into the battery, some of which infiltrates the pole pieces through the top of the bare cell, and most of which is deposited directly on the bottom of the battery case. However, because the bottom of the bare cell is basically attached to the bottom of the shell, electrolyte is difficult to infiltrate from the bottom to the pole piece, the infiltration efficiency is low, gas generated during battery formation is difficult to discharge, and the anode carbon loss of the cell in the circulation process easily corrodes the shell.

Disclosure of Invention

The application provides a electricity core layer board, battery monomer, battery and power consumption device to promote the infiltration efficiency of electricity core, promote the exhaust effect when battery formation, and reduce the corrosion rate of casing, improve the life of electricity core.

In a first aspect, embodiments of the present application provide a cell support plate, the cell support plate comprising:

the first supporting plate is provided with a plurality of through holes;

the first support plate is installed on the second support plate, a cavity is defined jointly, the through holes are communicated with the cavity, and a channel communicated with the cavity is formed in the side wall of the cavity.

In the technical scheme, through setting up first layer board and second layer board to the processing of electricity core layer board, reduction in production cost, with first layer board and second layer board concatenation during the assembly can, electrolyte passes a plurality of through-holes of first layer board when filling electrolyte can effectively infiltrate electric core bottom, and make the infiltration more even, improve the infiltration effect, the gas that makes the battery produce when the formation can be discharged through-hole and passageway, reduce the formation and become the probability of exhaust inefficacy, the positive pole of electric core in the use falls the carbon and also can accept through the second layer board and collect, make positive pole fall the carbon and keep apart with the casing, reduce the corrosion rate of casing, improve electric core life.

In some embodiments, the second pallet has first bosses on both sides extending in a first direction, the first pallet being supported on the first bosses to be spaced apart from an upper surface of the second pallet to form the cavity, the channels being formed between sides of the second pallet extending in a second direction and the first pallet, the first direction intersecting the second direction.

In the technical scheme, the first supporting plate and the second supporting plate are spaced apart by the first boss, so that gas circulation and electrolyte containing are facilitated.

In some embodiments, the second pallet has second bosses on both sides extending in a second direction, the second bosses being spaced apart from the first pallet to form the channels.

In the above technical scheme, through setting up the second boss, when the carbon residue deposit that the positive pole dropped on the second layer board surface, second boss and first boss play spacing effect, make the carbon residue be difficult to follow passageway side and fall out the cavity, promote the life of battery.

In some embodiments, the protruding height H1 of the first boss and the protruding height H2 of the second boss satisfy:

0.25≤H2/H1≤0.75。

in the technical scheme, the relative heights of the first boss and the second boss are limited, so that the barrier property of the second boss to carbon slag can be ensured while the flow-through property of the channel is ensured.

In some embodiments, the width of the second pallet in the second direction is W1, and the width of the second boss in the first direction is W2, satisfying:

0.05≤W2/W1≤0.1。

in the technical scheme, the proportion of the width of the second supporting plate to the width of the second boss is limited, so that the second boss is prevented from occupying the space of the cavity, the probability that carbon slag falls onto the second boss when falling into the cavity through the through hole is reduced, and the carbon slag is prevented from falling out of the channel as much as possible.

In some embodiments, the width of the second pallet in the second direction is W1, and the width of the first boss in the second direction is W3, satisfying:

0.05≤W3/W1≤0.1。

in the technical scheme, through limiting the proportion of the width of the second supporting plate to the width of the first boss, on one hand, the first boss is prevented from occupying the space of the cavity, or the through hole is blocked, the colleague ensures that the contact area between the first boss and the first supporting plate is enough, the supporting strength of the first boss to the first supporting plate is improved, and the structural stability is improved.

In some embodiments, the first pallet is provided with a first locating structure and the second pallet is provided with a second locating structure, the first locating structure being in locating engagement with the second locating structure.

In the above technical scheme, through setting up first location structure and second location structure in order to make first layer board and second layer board spacing relatively, prevent first layer board and second layer board dislocation in the use, promote structural stability.

In some embodiments, the first positioning structure is a positioning column, the positioning column is arranged on one side of the first supporting plate facing the second supporting plate and extends along the thickness direction of the first supporting plate, the second positioning structure is a positioning groove, and the positioning column extends into the positioning groove to be matched with the positioning groove in a positioning way.

In the technical scheme, the positioning column can extend into the positioning groove so that the first supporting plate and the second supporting plate are limited in the first direction and the second direction.

In some embodiments, the radial dimension of the positioning post is D1, and the length of the first boss in the first direction is L1, which satisfies:

0.05≤D1/L1≤0.1。

in the technical scheme, the relation between the radial dimension of the positioning column and the length of the first boss is limited, so that the strength of the positioning column is ensured, too much space is not occupied, and the number and coverage rate of the through holes are ensured.

In some embodiments, the first pallet has a thickness T1 and the second pallet has a thickness T2, satisfying:

1/3≤T1/T2≤1/2。

in the above-mentioned technical scheme, the method comprises the steps of,

in some embodiments, the radial dimension D2 of the through hole satisfies:

0.2mm≤D2≤2mm。

in the technical scheme, the ratio of the thickness of the first supporting plate to the thickness of the second supporting plate is limited, so that the structural strength of the first supporting plate is ensured, the structural strength of the first supporting plate when the first supporting plate supports the battery cell is improved, and the deformation is not easy to occur.

In a second aspect, embodiments of the present application provide a battery cell, including:

a housing;

the battery cell is arranged in the shell;

the battery cell support plate according to any one of the above embodiments, wherein the battery cell support plate is disposed between the battery cell and the bottom wall of the housing.

In the technical scheme, through setting up the electric core layer board, a plurality of through-holes can effectively infiltrate electric core bottom to make infiltration more even, improve infiltration effect, make the gas that the battery produced when formation can be discharged through-hole and passageway, reduce formation exhaust failure's probability, make the positive pole fall carbon and keep apart with the casing, reduce the corrosion rate of casing, improve electric core life.

In some embodiments, the channel and the winding curvature of the cell face the same side of the housing.

In the technical scheme, the winding bending parts of the channels and the battery cells face the same side of the shell, so that gas in the cavity enters into a clearance space between the shell and the winding bending parts through the channels, exhaust and liquid injection are facilitated, and the exhaust effect is improved.

In a third aspect, embodiments of the present application provide a battery, including:

a plurality of cells as described in any of the above embodiments.

In the technical scheme, through setting up the electric core layer board, a plurality of through-holes can effectively infiltrate electric core bottom to make infiltration more even, improve infiltration effect, make the gas that the battery produced when formation can be discharged through-hole and passageway, reduce formation exhaust failure's probability, make the positive pole fall carbon and keep apart with the casing, reduce the corrosion rate of casing, improve electric core life, and then improve the life of battery.

In a fourth aspect, an embodiment of the present application provides an electrical device, including:

the battery according to the above embodiment is used for supplying electric power to the electric device.

In the above technical scheme, through setting up electric core layer board in the battery monomer, a plurality of through-holes can effectively infiltrate electric core bottom to make infiltration more even, improve infiltration effect, make the gas that the battery produced when formation can be discharged through-hole and passageway, reduce formation exhaust failure's probability, make the positive pole fall carbon and keep apart with the casing, reduce the corrosion rate of casing, improve electric core life, and then improve battery and power consumption device's life.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered limiting the scope, and that other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic illustration of a vehicle according to some embodiments of the present application;

FIG. 2 is an exploded view of a battery according to some embodiments of the present application;

fig. 3 is a structural exploded view of a battery cell according to some embodiments of the present application;

fig. 4 is a schematic structural diagram of a core supporting plate according to some embodiments of the present disclosure;

FIG. 5 is one of the schematic cross-sectional structural views of a cell tray provided in some embodiments of the present application;

FIG. 6 is an enlarged view of FIG. 5 at A;

FIG. 7 is one of the exploded views of the structure of a cell tray provided in some embodiments of the present application;

fig. 8 is a second exploded view of a cell plate according to some embodiments of the present disclosure.

Reference numerals:

vehicle 1, battery 10, motor 20, controller 30;

the battery pack comprises a case 11, a first case body 111, a second case body 112, a battery cell 12, a case 121, a battery cell 122, and a winding bending portion 1221;

the battery cell support plate 123, the cavity 1231, the through hole 1232, the channel 1233, the first support plate 1234, the positioning column 12341, the second support plate 1235, the first boss 12351, the second boss 12352, and the positioning groove 12353.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description and claims of the present application and in the description of the figures above are intended to cover non-exclusive inclusions. The terms first, second and the like in the description and in the claims or in the above-described figures, are used for distinguishing between different objects and not necessarily for describing a particular sequential or chronological order.

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly understand that the embodiments described herein may be combined with other embodiments.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "attached" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

The term "and/or" in this application is merely an association relation describing an associated object, and indicates that three relations may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In this application, the character "/" generally indicates that the associated object is an or relationship.

The term "plurality" as used herein refers to two or more (including two), and similarly, "plural sets" refers to two or more (including two), and "plural sheets" refers to two or more (including two).

The battery cells mentioned in the embodiments of the present application may include a lithium ion secondary battery, a lithium ion primary battery, a lithium sulfur battery, a sodium lithium ion battery, a sodium ion battery, a magnesium ion battery, or the like, to which the embodiments of the present application are not limited. The battery cells may be cylindrical, flat, rectangular, or otherwise shaped, as well as the embodiments herein are not limited in this regard. The battery cells are generally classified into three types according to the packaging method: the cylindrical battery cell, the square battery cell and the soft pack battery cell are not limited thereto.

Reference to a battery in embodiments of the present application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery referred to in the present application may include a battery module or a battery pack, or the like. The battery generally includes a case for housing one or more battery cells or a plurality of battery modules. The case body can prevent liquid or other foreign matters from affecting the charge or discharge of the battery cells.

The battery cell includes a case, an electrode assembly, and an electrolyte, and the case is used to accommodate the electrode assembly and the electrolyte. The electrode assembly consists of a positive electrode plate, a negative electrode plate and a separation film. The battery cell mainly relies on metal ions to move between the positive pole piece and the negative pole piece to work. The positive electrode plate comprises a positive electrode current collector and a positive electrode active material layer, wherein the positive electrode active material layer is coated on the surface of the positive electrode current collector, the positive electrode current collector without the positive electrode active material layer protrudes out of the positive electrode current collector coated with the positive electrode active material layer, and the positive electrode current collector without the positive electrode active material layer is used as a positive electrode lug. Taking a lithium ion battery as an example, the material of the positive electrode current collector may be aluminum, and the positive electrode active material may be lithium cobaltate, lithium iron phosphate, ternary lithium, lithium manganate or the like. The negative electrode plate comprises a negative electrode current collector and a negative electrode active material layer, wherein the negative electrode active material layer is coated on the surface of the negative electrode current collector, the negative electrode current collector without the negative electrode active material layer protrudes out of the negative electrode current collector coated with the negative electrode active material layer, and the negative electrode current collector without the negative electrode active material layer is used as a negative electrode tab. The material of the negative electrode current collector may be copper, and the negative electrode active material may be carbon, silicon, or the like. In order to ensure that the high current is passed without fusing, the number of positive electrode lugs is multiple and stacked together, and the number of negative electrode lugs is multiple and stacked together.

The material of the separator may be PP (polypropylene) or PE (polyethylene). In addition, the electrode assembly may be a wound structure or a lamination structure, and the embodiment of the present application is not limited thereto.

In recent years, new energy automobiles have been developed dramatically, and in the field of electric automobiles, a power battery plays an important role as a power source of the electric automobile. The battery is composed of a box body and a plurality of battery monomers accommodated in the box body. The battery is used as a core part of a new energy automobile, and has high requirements on safety and cycle service life.

In a typical battery manufacturing process, electrolyte is filled from the top of the battery into the battery, and a portion of the electrolyte wets the pole piece through the top of the bare cell, while a majority is deposited directly on the bottom of the battery case. However, because the bottom of naked electric core is basically laminated with the casing bottom, electrolyte hardly wets from the bottom to the pole piece, infiltration efficiency is lower, and when battery formation, because the clearance between the bottom of naked electric core and the casing is less, the gas that produces is difficult to discharge, and the electric core falls the bottom of casing after the positive pole falls the carbon in the cyclic process, causes the corruption to the casing easily.

Based on above-mentioned consideration, in order to solve electrolyte from the bottom infiltration difficulty of naked electric core, formation exhaust difficulty to and the electric core circulation in-process positive pole falls the problem that carbon caused the corruption to the casing, the application has designed a electric core layer board, and electric core layer board defines the cavity, and the roof of cavity is equipped with a plurality of through-holes, and the lateral wall of cavity is equipped with the passageway with the cavity intercommunication.

In the electric core layer board of this kind of structure, be arranged in holding electrolyte through setting up the cavity, through setting up a plurality of through-holes at the roof of cavity, electrolyte can be by the cavity along the ascending infiltration electric core of through-hole, and a plurality of through-holes can make the infiltration more even, improve the infiltration effect, through setting up the passageway at the lateral wall of cavity, the gas that makes the battery produce when the formation can be discharged through-hole and passageway, reduce the probability of formation exhaust inefficacy, and the electric core falls the carbon at the circulation in-process positive pole and can be collected by the cavity of electric core layer board, make positive pole fall carbon and casing keep apart, reduce the corrosion rate of casing, improve electric core life.

The battery disclosed by the embodiment of the application can be used in electric devices such as vehicles, ships or aircrafts, but is not limited to the batteries. The power supply system with the battery thermal management system, the battery and the like disclosed by the application can be used for forming the power utilization device, so that the application range of the battery thermal management system is favorably improved, and the assembly difficulty of the battery thermal management system is reduced.

The embodiment of the application provides an electricity utilization device using a battery as a power supply, wherein the electricity utilization device can be, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft and the like. Among them, the electric toy may include fixed or mobile electric toys, such as game machines, electric car toys, electric ship toys, electric plane toys, and the like, and the spacecraft may include planes, rockets, space planes, and spacecraft, and the like.

For convenience of description, the following embodiment will take an electric device according to an embodiment of the present application as an example of the vehicle 1.

As shown in fig. 1, a schematic structural diagram of a vehicle 1 according to an embodiment of the present application is shown, where the vehicle 1 may be a fuel-oil vehicle, a gas-fired vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended range vehicle. The motor 20, the controller 30 and the battery 10 may be provided inside the vehicle 1, and the controller 30 is configured to control the battery 10 to supply power to the motor 20. For example, the battery 10 may be provided at the bottom or the head or the tail of the vehicle 1. The battery 10 may be used for power supply of the vehicle 1, e.g. the battery 10 may be used as an operating power source for the vehicle 1, for electrical circuitry of the vehicle 1, e.g. for start-up, navigation and operational power requirements of the vehicle 1. In another embodiment of the present application, the battery 10 may not only serve as an operating power source for the vehicle 1, but also as a driving power source for the vehicle 1, instead of or in part instead of fuel oil or natural gas, to provide driving power for the vehicle 1.

To meet different power requirements, the battery 10 may include a plurality of battery cells 12, where the plurality of battery cells 12 may be connected in series or parallel or a series-parallel connection, where a series-parallel connection refers to a mixture of series and parallel connections.

As shown in fig. 2, a structural exploded view of the battery 10 according to one embodiment of the present application is shown. The battery 10 includes a case 11 and a plurality of battery cells 12, and the battery cells 12 are accommodated in the case 11. The case 11 is used to provide an assembly space for the battery cells 12, and the case 11 may have various structures. In some embodiments, the case 11 may include a first case body 111 and a second case body 112, the first case body 111 and the second case body 112 being overlapped with each other, the first case body 111 and the second case body 112 together defining an assembly space for accommodating the battery cell 12. The second case body 112 may have a hollow structure with one end opened, the first case body 111 may have a plate-shaped structure, and the first case body 111 covers the open side of the second case body 112, so that the first case body 111 and the second case body 112 together define an assembly space; the first case body 111 and the second case body 112 may be hollow structures each having one side opened, and the open side of the first case body 111 may be closed to the open side of the second case body 112. Of course, the case 11 formed by the first case body 111 and the second case body 112 may be various shapes, such as a cylinder, a rectangular parallelepiped, and the like.

In the battery 10, the plurality of battery cells 12 may be connected in series or parallel or a series-parallel connection, wherein a series-parallel connection refers to that the plurality of battery cells 12 are connected in series or parallel. The plurality of battery cells 12 can be directly connected in series or in parallel or in series-parallel, and then the whole formed by the plurality of battery cells 12 is accommodated in the box 11; of course, the battery 10 may also be a battery module form formed by connecting a plurality of battery cells 12 in series or parallel or series-parallel connection, and then connecting a plurality of battery modules in series or parallel or series-parallel connection to form a whole and be accommodated in the case 11. The battery 10 may also include other structures, for example, the battery 10 may also include a bus bar member for making electrical connection between the plurality of battery cells 12.

Referring to fig. 3, fig. 3 is a schematic partial structure of a battery 10 according to some embodiments of the present application. The battery 10 includes a plurality of rows of battery cells 12, the plurality of rows of battery cells 12 being arranged along a first direction X, each row of battery cells 12 including a plurality of battery cells 12 arranged along a second direction Y. The first direction X and the second direction Y are the longitudinal direction of the case 11 and the width direction of the case 11, respectively, and are perpendicular to each other.

Wherein each battery cell 12 may be a secondary battery or a primary battery; but not limited to, lithium sulfur batteries, sodium ion batteries, or magnesium ion batteries. The battery cells 12 may be cylindrical, flat, rectangular, or otherwise shaped. Illustratively, in fig. 3, the battery cell 12 is rectangular in shape.

According to some embodiments of the present application, as shown in fig. 3, the present application proposes a battery cell 12, the battery cell 12 may include a housing 121, a battery cell 122, and a battery cell support plate 123.

The housing 121 may be provided with a top opening, and a top cover may be provided at the top opening. The battery cell 122 may be disposed in the housing 121, and the battery cell support plate 123 is disposed between the battery cell 122 and the bottom wall of the housing 121, and the battery cell support plate 123 may serve to support the battery cell 122 and separate the battery cell 122 from the bottom wall of the housing 121.

According to some embodiments of the present application, as shown in fig. 4-8, the present application also provides a cell support plate 123, where the cell support plate 123 may include a first support plate 1234 and a second support plate 1235.

The first and second trays 1234, 1235 may be distributed along the thickness direction of the cell tray 123, the first tray 1234 may be mounted on the second tray 1235, and the first and second trays 1234, 1235 may collectively define the cavity 1231.

The second tray 1235 is supported between the first tray 1234 and the bottom wall of the housing 121, and the first tray 1234 and the second tray 1235 can be at least partially spaced apart such that the first tray 1234 and the second tray 1235 together define a cavity 1231 for the cavity 1231 to contain electrolyte.

By defining a cavity 1231 for containing electrolyte inside the cell plate 123, electrolyte can enter the cavity 1231 when electrolyte is poured into the battery cells 12.

The first carrier 1234 may be provided with a plurality of through holes 1232. The through holes 1232 may communicate with the upper space of the cell holder 123 and the cavity 1231, and the first holder 1234 is used to support the bottom of the cell 122. Through setting up a plurality of through-holes 1232, after filling electrolyte in cavity 1231, electrolyte can upwards overflow from a plurality of through-holes 1232 to the bottom of electric core 122 to infiltration core 122's bottom promotes infiltration efficiency. The plurality of through holes 1232 may be spaced apart in an array along the length direction and the width direction of the first supporting plate 1234, so that when the electrolyte overflows through the plurality of through holes 1232, the battery cells 122 may be uniformly infiltrated, and the infiltration effect may be improved. It will be appreciated that there may be a portion of the through holes 1232 not facing the cells 122, which portion of the through holes 1232 may allow electrolyte to enter the cavity 1231 when filled with electrolyte.

The side walls of the cavity 1231 may be provided with a passage 1233 communicating with the cavity 1231, and the passage 1233 may communicate with the cavity 1231 and the side space of the tray of the battery cells 122, that is, with the cavity 1231 and the inner space of the case 121. Electrolyte can enter the cavity 1231 through the channel 1233 when the electrolyte is poured, and in the process of forming the battery cell 122, gas generated by formation can enter the cavity 1231 through the through hole 1232 at the lower side of the battery cell 122, and then be discharged to the inner space of the shell 121, namely between the shell 121 and the battery cell 122 through the channel 1233, so that the gas is discharged conveniently.

In an actual implementation, the first supporting plate 1234 and the second supporting plate 1235 can be processed separately, so that the processing difficulty is low and the production cost is reduced. When the electrolyte is poured, the electrolyte can enter the cavity 1231 through part of the through holes 1232 and the channels 1233, and after the cavity 1231 is filled, the electrolyte can overflow through the plurality of through holes 1232 on the top wall and uniformly infiltrate the bottom of the battery cell 122. In the formation stage of the battery cell 122, the gas generated by formation can be discharged into the cavity 1231 through the through hole 1232 at the lower side of the battery cell 122, then discharged between the housing 121 and the battery cell 122 through the channel 1233, and discharged through the liquid injection port at the top of the battery, so that the exhaust is smooth. In the normal cycle process of the battery cell 122, the phenomenon that carbon is dropped from the anode can occur, and the dropped carbon slag can enter the cavity 1231 through the through hole 1232 to be collected, so that the carbon slag can not directly drop on the bottom wall of the shell 121, and corrosion to the shell 121 is reduced.

According to the electric core layer board 123 that this application provided, through setting up first layer board 1234 and second layer board 1235 to the processing of electric core layer board 123, reduction in production cost, with first layer board 1234 and second layer board 1235 concatenation can during the assembly. The electrolyte passes through the through holes 1232 of the first support plate 1234 when the electrolyte is poured, so that the infiltration is more uniform, the infiltration effect is improved, gas generated during formation of the battery can be discharged through the through holes 1232 and the channels 1233, the probability of failure of formation exhaust is reduced, carbon dropping of the anode of the battery cell 122 in the use process can also be collected through the second support plate 1235, the carbon dropping of the anode is isolated from the shell 121, the corrosion speed of the shell 121 is reduced, and the service life of the battery cell 122 is prolonged.

According to some embodiments of the present application, as shown in fig. 5-7, both sides of the second pallet 1235 extending in the first direction may have first bosses 12351, the first pallet 1234 may be supported on the first bosses 12351 to be spaced apart from the upper surface of the second pallet 1235 to form cavities 1231, and the channels 1233 may be formed between the sides of the second pallet 1235 extending in the second direction and the first pallet 1234, and the first direction and the second direction may be disposed to intersect.

It should be noted that, here, the shape of the cell supporting plate 123 is matched with the shape of the cell 122 to ensure that the cell supporting plate 123 can effectively support the cell 122, for example, as shown in fig. 4, the cell 122 is set in a rectangular shape, the cell supporting plate 123 is set in a rectangular shape, the length direction of the cell 122, that is, the length direction of the cell supporting plate 123, that is, the first direction, and the width direction of the cell 122, that is, the width direction of the cell supporting plate 123, that is, the second direction, and the following description will take this direction indication as an example. In the present embodiment, the first boss 12351 protrudes from the upper surface of the second tray 1235 and is supported on the lower side of the first tray 1234 such that the lower side of the first tray 1234 is spaced apart from the upper side of the second tray 1235.

The first bosses 12351 extend along the first direction, and the two first bosses 12351 are respectively supported on two sides of the first supporting plate 1234 extending along the first direction, so as to ensure the supporting strength of the second supporting plate 1235 to the first supporting plate 1234, and further ensure the supporting stability of the first supporting plate 1234 to the battery core 122. The side edges of the first pallet 1234 in the second direction are spaced apart from the side edges of the second pallet 1235 in the second direction to form channels 1233 for the circulation of gas and electrolyte.

It should be further noted that, in another embodiment, the first direction may be a width direction of the cell support plate 123, and the second direction may be a length direction of the cell support plate 123, which is not described herein.

According to some embodiments of the present application, as shown in fig. 5-7, both sides of the second pallet 1235 extending in the second direction may have second bosses 12352, and the second bosses 12352 may be spaced apart from the first pallet 1234 to form the channels 1233.

In the present embodiment, the second boss 12352 protrudes from the upper surface of the second support plate 1235, and the first support plate 1234, the second support plate 1235, the first boss 12351, and the second boss 12352 together define the hollow space 1231, and the second boss 12352 is disposed apart from the lower side of the first support plate 1234 to form the channel 1233 through which the electrolyte gas flows. Wherein, second boss 12352 can be connected with two first boss 12351 respectively at the ascending both ends of second direction, through setting up second boss 12352, when the carbon residue deposit that the positive pole dropped is on the surface of second layer board 1235, second boss 12352 and first boss 12351 play spacing effect, make the carbon residue be difficult to follow passageway 1233 side and fall out cavity 1231, promote the life of battery.

In some embodiments, the second boss 12352 may be connected to the lower side of the first supporting plate 1234, and a communication groove is disposed in the middle of the second boss 12352, where the communication groove may connect the cavity 1231 and the inner space of the housing 121, so as to form a channel 1233, and when the exhaust is formed, the gas may be discharged through the through hole 1232 and the channel 1233 formed on the second supporting plate 1235, so as to ensure the exhaust effect.

According to some embodiments of the present application, with the cell tray 123 installed in the cell 12, the channels 1233 and the winding bends 1221 of the cells 122 face the same side of the housing 121.

In the wound battery cell 122, the winding curved portion 1221 exists in the winding direction of the battery cell 122, and a partial interval is formed between the region of the winding curved portion 1221 and the inner wall of the housing 121 on the corresponding side of the battery cell 122 so that the channel 1233 and the winding curved portion 1221 of the battery cell 122 face the same side of the housing 121, so that the gas in the cavity 1231 enters into the gap space between the housing 121 and the winding curved portion 1221 through the channel 1233, thereby facilitating the exhaust and injection, and improving the exhaust effect.

According to some embodiments of the present application, as shown in fig. 6, the protruding height H1 of the first boss 12351 and the protruding height H2 of the second boss 12352 may satisfy: H2/H1 is more than or equal to 0.25 and less than or equal to 0.75.

In the present embodiment, the height of the first boss 12351 protruding from the upper surface of the second supporting plate 1235 is H1, the height of the second boss 12352 protruding from the upper surface of the second supporting plate 1235 is H2, and the barrier property of the second boss 12352 against carbon residue can be ensured while the flow-through property of the channel 1233 is ensured by defining the relative heights of the first boss 12351 and the second boss 12352.

For example, the ratio of the protruding height H1 of the first boss 12351 to the protruding height H2 of the second boss 12352 may be: h2/h1=0.25; or h2/h1=0.5; or h2/h1=0.75.

According to some embodiments of the present application, as shown in fig. 4 and 6, the width of the second supporting plate 1235 in the second direction may be W1, and the width of the second boss 12352 in the first direction may be W2, which may satisfy: W2/W1 is more than or equal to 0.05 and less than or equal to 0.1.

In this embodiment, the ratio of the width W1 of the second support plate 1235 to the width W2 of the second boss 12352 in the first direction may be: w2/w1=0.05; or W2/w1=0.075; w2/w1=0.1. By defining the ratio of the width of the second support plate 1235 to the width of the second boss 12352 to avoid the second boss 12352 encroaching on the space of the cavity 1231, the chance of carbon residue falling onto the second boss 12352 when falling into the cavity 1231 through the through-hole 1232 is reduced, and carbon residue falling out of the channel 1233 is avoided as much as possible.

According to some embodiments of the present application, as shown in fig. 4 and 6, the width of the second supporting plate 1235 in the second direction may be W1, and the width of the first boss 12351 in the second direction may be W3, which may satisfy: W3/W1 is more than or equal to 0.05 and less than or equal to 0.1.

In this embodiment, the length direction of the cell support plate 123 may be taken as a first direction, the width direction of the cell support plate 123 may be taken as a second direction, and the ratio of the width W1 of the second support plate 1235 to the width W3 of the first boss 12351 in the second direction may be: w3/w1=0.05; or w3/w1=0.075; w3/w1=0.1. By limiting the ratio of the width of the second supporting plate 1235 to the width of the first boss 12351, on one hand, the first boss 12351 is prevented from occupying the space of the cavity 1231, or the through hole 1232 is blocked, and the colleague ensures that the contact area between the first boss 12351 and the first supporting plate 1234 is enough, the supporting strength of the first boss 12351 to the first supporting plate 1234 is improved, and the structural stability is improved.

According to some embodiments of the present application, the first tray 1234 may be provided with a first positioning structure and the second tray 1235 may be provided with a second positioning structure, the first positioning structure being in positioning engagement with the second positioning structure.

Through setting up first location structure and second location structure so that first layer board 1234 and the relative spacing of second layer board 1235, prevent that first layer board 1234 and second layer board 1235 dislocation in the use, promote structural stability.

According to some embodiments of the present application, as shown in fig. 7 and 8, the first positioning structure may be a positioning post 12341, the positioning post 12341 may be disposed on a side of the first supporting plate 1234 facing the second supporting plate 1235 and extending along a thickness direction of the first supporting plate 1234, the second positioning structure may be a positioning groove 12353, and the positioning post 12341 may extend into the positioning groove 12353 to be in positioning fit with the positioning groove 12353.

In this embodiment, the first positioning structure may be a positioning column 12341, where the positioning column 12341 extends downward from the lower side of the first supporting plate 1234, and the second positioning structure may be a positioning groove 12353, where the positioning column 12341 may extend into the positioning groove 12353 to limit the first supporting plate 1234 and the second supporting plate 1235 in the first direction and the second direction.

The positioning posts 12341 and the positioning grooves 12353 may be in transition fit, wherein the shape of the positioning posts 12341 is not limited herein, and the positioning posts 12341 may be cylindrical, square, rectangular, etc., and the shape of the positioning grooves 12353 is the same as the shape of the positioning posts 12341. For example, as shown in fig. 8, the positioning post 12341 may be cylindrical, the positioning groove 12353 is circular in cross section, and the positioning post 12341 is convenient to be matched and connected with the positioning groove 12353, and easy to install.

In an example, as shown in fig. 7 and 8, the positioning groove 12353 may penetrate the second supporting plate 1235 in the thickness direction and be provided as a through groove.

In another example, the positioning groove 12353 may be disposed on a surface of the second supporting plate 1235 facing the first supporting plate 1234, that is, an upper surface of the second supporting plate 1235, the positioning post 12341 extends into the positioning groove 12353, and an end of the positioning post 12341 away from the first supporting plate 1234 may be connected to the bottom wall of the positioning groove 12353 or may be disposed at a distance from the bottom wall of the positioning groove 12353.

According to some embodiments of the present application, as shown in fig. 8, the radial dimension of the positioning post 12341 is D1, and the length of the first boss 12351 in the first direction is L1, which may satisfy: D1/L1 is more than or equal to 0.05 and less than or equal to 0.1.

It can be appreciated that the first supporting plate 1234 cannot be provided with the through holes 1232 in the region corresponding to the positioning columns 12341, and by defining the relationship between the radial dimension of the positioning columns 12341 and the length of the first boss 12351, the strength of the positioning columns 12341 is ensured, and meanwhile, too much space is not occupied, so that the number and coverage rate of the through holes 1232 are ensured.

For example, the ratio of the radial dimension D1 of the positioning post 12341 to the length L1 of the first boss 12351 in the first direction may be: d1/l1=0.05; or d1/l1=0.075; or d1/l1=0.1.

According to some embodiments of the present application, as shown in fig. 6, the thickness of the first supporting plate 1234 is T1, and the thickness of the second supporting plate 1235 is T2, it may be that: T1/T2 is less than or equal to 1/3 and less than or equal to 1/2.

In order to realize the lightweight of battery, the thickness of the electric core supporting plate 123 is generally thinner, and the ratio of the thickness of the first supporting plate 1234 to the thickness of the second supporting plate 1235 is limited to ensure the structural strength of the first supporting plate 1234, so that the structural strength of the first supporting plate 1234 when supporting the electric core 122 is improved, and the deformation is not easy to generate.

It should be noted that the thickness T2 of the second supporting plate 1235 is the sum of the thickness of the second supporting plate 1235 body and the protruding height H1 of the first boss 12351. Illustratively, the ratio of the thickness T1 of the first pallet 1234 to the thickness T2 of the second pallet 1235 may be: t1/t2=1/3; or t1/t2=2/5; or T1/t2=1/2.

According to some embodiments of the present application, as shown in fig. 6, the radial dimension of the through hole 1232 is D2, which may satisfy: d2 is more than or equal to 0.2mm and less than or equal to 2mm.

In this embodiment, the radial dimension D2 of the through hole 1232 may be 0.2mm less than or equal to D2 mm less than or equal to 2mm, and by defining the radial dimension of the through hole 1232, the through hole 1232 is not too small, which affects the overflow of the electrolyte, and the through hole 1232 is not too large, which affects the structural strength of the first supporting plate 1234.

In one example, every 1cm on the first pallet 1234 ² At least one through hole 1232 may be provided to secure coverage of the through hole 1232 on the first pallet 1234.

In the present embodiment, the cross-sectional shape of the through hole 1232 may be circular, square, or rectangular, and is not particularly limited herein.

According to some embodiments of the present application, there is also provided a battery comprising a plurality of battery cells 12 according to any of the above aspects.

According to some embodiments of the present application, there is also provided an electrical device comprising a battery according to any of the above aspects, and the battery is used to provide electrical energy to the electrical device.

The powered device may be any of the aforementioned devices or systems employing batteries.

According to some embodiments of the present application, as shown in fig. 4-8, a cell support plate 123 is provided. The cell support plate 123 is rectangular, the length direction of the cell support plate 123 is a first direction, the width direction of the cell support plate 123 is a second direction, the cell support plate 123 comprises a first support plate 1234 and a second support plate 1235 which are stacked in the thickness direction, and the first support plate 1234 is mounted on the upper side of the second support plate 1235.

The first plate 1234 is provided with a plurality of through holes 1232 arranged in an array along the first direction and the second direction. The upper surface of the second supporting plate 1235 is provided with two first bosses 12351 and two second bosses 12352, the two first bosses 12351 are respectively arranged on two sides of the second supporting plate 1235 extending along the first direction, the two second bosses 12352 are respectively arranged on two sides of the second supporting plate 1235 extending along the second direction, the first supporting plate 1234 is supported on top ends of the two first bosses 12351, so that the first supporting plate 1234 is spaced from the second supporting plate 1235, the protruding height of the two second bosses 12352 protruding out of the upper surface of the second supporting plate 1235 is smaller than the protruding height of the first bosses 12351, so that the two second bosses 12352 are spaced from the lower surface of the first supporting plate 1234 to form a channel 1233, and the first supporting plate 1234, the second supporting plate 1235, the first bosses 12351 and the second bosses 12352 jointly define an empty cavity 1231. The lower surface of the first support plate 1234 is provided with a positioning column 12341, the second support plate 1235 is provided with a positioning groove 12353 which can be matched with the positioning column 12341 in a positioning way, and the positioning column 12341 stretches into the positioning groove 12353.

Wherein the protruding height H1 of the first boss 12351 and the protruding height H2 of the second boss 12352 satisfy 0.25.ltoreq.H2/H2.ltoreq.0.75. The width W1 of the second supporting plate 1235 in the second direction and the width W2 of the second boss 12352 in the first direction satisfy 0.05.ltoreq.W2/W1.ltoreq.0.1. The width W1 of the second support plate 1235 in the second direction and the width W3 of the first boss 12351 in the second direction satisfy 0.05.ltoreq.W3/W1.ltoreq.0.1. The radial dimension D1 of the positioning column 12341 and the length of the first boss 12351 in the first direction are L1, and D1/L1 is more than or equal to 0.05 and less than or equal to 0.1. The thickness T1 of the first pallet 1234 and the thickness T2 of the second pallet 1235 satisfy 1/3.ltoreq.T1/T2.ltoreq.1/2. The diameter D2 of the through hole 1232 satisfies D2 which is more than or equal to 0.2mm and less than or equal to 2mm.

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

The foregoing is merely a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and variations may be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims (15)

1. A battery cell support plate, comprising:

the first supporting plate is provided with a plurality of through holes;

the first support plate is installed on the second support plate, a cavity is defined jointly, the through holes are communicated with the cavity, and a channel communicated with the cavity is formed in the side wall of the cavity.

2. The cell tray of claim 1, wherein the second tray has first bosses on both sides extending in a first direction, the first tray is supported on the first bosses to be spaced apart from an upper surface of the second tray to form the cavity, and the channels are formed between sides of the second tray extending in a second direction and the first tray, the first direction intersecting the second direction.

3. The cell tray of claim 2, wherein both sides of the second tray extending in the second direction have second bosses spaced apart from the first tray to form the channels.

4. The cell support plate of claim 3, wherein the protruding height H1 of the first boss and the protruding height H2 of the second boss satisfy:

0.25≤H2/H1≤0.75。

5. the cell plate of claim 3, wherein the width of the second plate in the second direction is W1 and the width of the second boss in the first direction is W2, satisfying:

0.05≤W2/W1≤0.1。

6. the cell plate of claim 2, wherein the second plate has a width W1 in the second direction and the first boss has a width W3 in the second direction, satisfying:

0.05≤W3/W1≤0.1。

7. the cell tray of claim 2, wherein the first tray is provided with a first positioning structure and the second tray is provided with a second positioning structure, the first positioning structure being in positioning engagement with the second positioning structure.

8. The cell support plate according to claim 7, wherein the first positioning structure is a positioning column, the positioning column is arranged on one side of the first support plate facing the second support plate and extends along the thickness direction of the first support plate, the second positioning structure is a positioning groove, and the positioning column extends into the positioning groove to be matched with the positioning groove in a positioning way.

9. The cell support plate of claim 8, wherein the radial dimension of the positioning post is D1, and the length of the first boss in the first direction is L1, which satisfies:

0.05≤D1/L1≤0.1。

10. the cell blade of claim 1, wherein the first blade has a thickness T1 and the second blade has a thickness T2, satisfying:

1/3≤T1/T2≤1/2。

11. the cell carrier according to any one of claims 1-10, characterized in that the radial dimension D2 of the through holes satisfies:

0.2mm≤D2≤2mm。

12. a battery cell, comprising:

a housing;

the battery cell is arranged in the shell;

the cell tray of any one of claims 1-11, disposed between the cells and a bottom wall of the housing.

13. The battery cell of claim 12, wherein the channel and the winding curvature of the cell face the same side of the housing.

14. A battery, comprising:

a plurality of the battery cells of claim 12 or 13.

15. An electrical device, comprising:

the battery of claim 14, for providing electrical energy to the powered device.