CN116325301A

CN116325301A - Battery, power utilization device, method for preparing battery and device for preparing battery

Info

Publication number: CN116325301A
Application number: CN202180064686.9A
Authority: CN
Inventors: 王磊; 陈兴地; 王鹏
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2021-07-28
Filing date: 2021-07-28
Publication date: 2023-06-23
Also published as: WO2023004649A1

Abstract

The embodiment of the application provides a battery, an electric device, and a method and a device for preparing the battery. The battery includes: a battery cell provided with an electrode terminal; the box body is used for accommodating the battery monomers; and a protection member disposed in the case, the protection member being disposed opposite to the electrode terminal, the protection member being configured to support the battery cell in a first direction opposite to a gravitational direction of the battery cell and to protect the electrode terminal. According to the technical scheme, the safety and stability of the battery can be enhanced.

Description

Battery, power utilization device, method for preparing battery and device for preparing battery

Technical Field

The present application relates to the field of energy storage devices, and more particularly, to a battery, an electrical device, a method of preparing a battery, and an apparatus for preparing a battery.

Background

Energy conservation and emission reduction are key to sustainable development of the automobile industry. In this case, the electric vehicle is an important component for sustainable development of the automobile industry due to the advantage of energy conservation and environmental protection. For electric vehicles, battery technology is an important factor for development.

With the continuous development of battery technology, higher requirements are placed on the performance of batteries, and it is desirable that the batteries can simultaneously consider various design factors.

Disclosure of Invention

The application provides a battery, an electric device, a method for preparing the battery and a device for preparing the battery so as to improve the safety of the battery.

In a first aspect, there is provided a battery comprising: a battery cell provided with an electrode terminal; the box body is used for accommodating the battery monomers; and a protection member disposed in the case, the protection member being disposed opposite to the electrode terminal, the protection member being configured to support the battery cell in a first direction opposite to a gravitational direction of the battery cell and to protect the electrode terminal.

In the battery, when the battery cell is disposed in such a manner that at least a part of the electrode terminals thereof face the case and is directly supported by the case in the opposite direction to the gravitational direction, the case may be deformed due to the impact force when the case side is collided or impacted, thereby causing the battery cell to be broken.

According to the technical scheme, the protection member is arranged between the electrode terminal and the box body, so that the protection member supports the portion, provided with the electrode terminal, of the battery cell in the direction opposite to the gravity direction, and when the box body is impacted by external force, the protection member can be used for protecting the battery cell from being damaged, and the insulation protection of the electrode terminal can be enhanced.

In some embodiments, the protective member is configured to deform to absorb impact energy when impacted by an external force. By forming the protection member to be deformable when an external force is applied thereto, the impact energy can be absorbed better, and the battery cell can be protected.

In some embodiments, the protective member includes a cushioning structure for absorbing impact energy when the protective member is impacted. Thereby, the rigidity of the shielding member can be enhanced, and the performance of the shielding member for absorbing impact energy can be further enhanced.

In some embodiments, the buffer structure is formed at a face of the protection member opposite to the battery cell. Examples of the buffer structure include a honeycomb rib structure formed on a surface of the protection member facing the battery cell, and a silicone rubber plate attached to a surface of the protection member facing the battery cell.

In some embodiments, the battery cell has a cover part, the electrode terminal is disposed at the cover part, and the shielding member is configured to support the cover part in the first direction. That is, the cover member, the shielding member, and the case, on which the electrode terminals are formed, are sequentially disposed from top to bottom in the gravitational direction. The shielding member supports the cap part of the battery cell from the bottom up.

In some embodiments, the cover member has a central portion, the electrode terminal is disposed at the central portion, the shielding member has a shielding portion disposed opposite the central portion, and a gap is provided between the shielding portion and the central portion in the first direction. By forming a gap between the shielding portion of the shielding member and the central portion of the cover part in the first direction, the shielding member can be allowed to deform when receiving an impact to absorb the impact energy.

In some embodiments, the central portion is disposed convex toward the guard portion in the first direction. This also forms a gap between the center of the lid member of the battery cell and the inside of the battery cell, and can protect the structure inside the battery cell even when the lid member of the battery cell is impacted.

In some embodiments, the cover part further includes side portions located at both sides of the central portion in a second direction orthogonal to the first direction, and the shielding member further includes a supporting portion connected to the shielding portion, the supporting portion being configured to support the side portions in the first direction. That is, in the cover member, the side portions are arranged on both sides of the center portion in the second direction, respectively, and the center portion protrudes toward the shielding portion of the shielding member in the first direction as compared to the both side portions. The shield member is formed with a support portion corresponding to the side portion, so that the side portion can be supported in the first direction by the support portion.

In some embodiments, the support portion is disposed to extend toward the side portion in the first direction. Thus, the support portion can be arranged using the height difference formed between the side portion and the center portion of the cover member, so that the space utilization can be improved, and the number of battery cells arranged in a limited space can be increased.

In some implementations, the battery further includes a thermal management component for containing a fluid to regulate temperature of the battery cells; wherein the support portion is configured to support the side portion in the first direction by the thermal management component. This enables the battery cells to be well temperature-controlled.

In some embodiments, the cover part further comprises a pressure release mechanism for actuation to release the internal pressure of the battery cell when the internal pressure or temperature reaches a threshold value, the protection member being provided with a vent at a position opposite to the pressure release mechanism. By forming the exhaust port in the protective member opposite to the pressure release mechanism, gas guiding and exhaust can be easily performed, heat generated by the thermal runaway battery cell is prevented from being further diffused to the adjacent battery cell, and heat insulation and fire prevention can be realized by the protective member when thermal runaway occurs.

In some embodiments, a gas passage is formed between the guard member and the cover part, the gas passage communicating with the exhaust port. By forming the gas passage communicating with the exhaust port, the exhaust discharged from the pressure release mechanism of the thermal runaway battery cell can be easily guided to the exhaust port, and the exhaust can be efficiently achieved.

In some embodiments, the guard member includes a securing portion for securing the guard member to the case.

In some embodiments, the shielding member is provided with the fixing portion along at least one side of a second direction orthogonal to the first direction, and the fixing portion is provided protruding toward an outside of the shielding member along the second direction.

In some embodiments, the housing includes a mounting portion fixedly coupled to the securing portion.

As described above, the cover member formed with the electrode terminals, the shielding member, and the case are sequentially disposed from top to bottom in the gravitational direction. The protective member is formed with a fixing portion protruding outward in the second direction, and the housing is formed with a mounting portion, so that the protective member and the housing can be firmly fixed by fixing the fixing portion to the mounting portion.

In some embodiments, the battery has a plurality of the battery cells, and the guard member is configured to cover the plurality of battery cells. A plurality of battery cells are generally arranged in a regular arrangement in a battery. In this case, by covering the plurality of battery cells with the protection member, impact protection can be provided to the battery cells in a wide range.

In a second aspect, there is provided an electrical device comprising: the battery of the first aspect. The battery is used for providing electric energy.

In a third aspect, there is provided a method of preparing a battery, comprising: providing a battery cell provided with an electrode terminal; providing a box body for accommodating the battery cells; and providing a protection member disposed in the case, the protection member being disposed opposite to the electrode terminal, wherein the protection member is configured to support the battery cell in a first direction opposite to a gravitational direction of the battery cell and to form protection for the electrode terminal.

In a fourth aspect, there is provided an apparatus for preparing a battery, comprising: a first providing module for providing a battery cell provided with an electrode terminal; the second providing module is used for providing a box body for accommodating the battery cells; a third providing module for providing a protective member; and the mounting module is used for arranging the protection component in the box body, enabling the protection component to be opposite to the electrode terminal, and configuring the protection component to support the battery cell along a first direction and form protection for the electrode terminal, wherein the first direction is opposite to the gravity direction of the battery cell.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application. In the drawings:

FIG. 1 is a schematic illustration of a vehicle according to one embodiment of the present application;

fig. 2 is a schematic perspective view of a battery according to an embodiment of the present application;

FIG. 3 is a schematic bottom view of the battery of FIG. 2;

FIG. 4 is a schematic view of section I-I of FIG. 3;

FIG. 5 is an enlarged schematic view of portion A of FIG. 4;

FIG. 6 is an enlarged schematic view of portion B of FIG. 4;

fig. 7 is a bottom view schematically showing the battery of fig. 2 with the case removed;

FIG. 8 is an enlarged schematic view of portion C of the securing portion of the guard member of one embodiment of the present application shown in FIG. 7;

FIG. 9 is a schematic view of section II-II of FIG. 7;

FIG. 10 is an enlarged schematic view of portion D of FIG. 9;

FIG. 11 is a schematic view of an exterior surface of a guard member covering a plurality of battery cells according to one embodiment of the present application;

FIG. 12 is a schematic view of the inner surface of the protective member of one embodiment of the present application shown in FIG. 11;

FIG. 13 is an enlarged schematic view of portion E of the cushioning structure of one embodiment of the present application shown in FIG. 12;

fig. 14 is a schematic flow chart of a method of making a battery according to one embodiment of the present application;

fig. 15 is a schematic block diagram of an apparatus for preparing a battery according to an embodiment of the present application.

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 of 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).

Reference to a battery in embodiments of the present application refers to a single physical module that includes multiple battery cells to provide higher voltages and capacities. For example, the battery referred to in the present application may include a battery module or a battery pack, or the like.

The battery cell comprises an electrode assembly and electrolyte, wherein the electrode assembly comprises a positive plate, a negative plate and a separation membrane. The battery cell mainly relies on metal ions to move between the positive and negative electrode plates to operate. The positive 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 current collector without the positive electrode active material layer protrudes out of the current collector coated with the positive electrode active material layer, and the 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 sheet 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 current collector without the negative electrode active material layer protrudes out of the current collector with the coated negative electrode active material layer, and the 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 isolating film may be PP, PE, etc. 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.

The development of battery technology is taking into consideration various design factors such as energy density, cycle life, discharge capacity, charge-discharge rate and other performance parameters, and the safety of the battery.

Currently, batteries for electric vehicles often require several tens or even thousands of battery cells to constitute.

In an electric device such as an electric vehicle, sometimes the battery is arranged with each battery cell inverted. That is, the battery cell is disposed in the case of the battery such that at least a portion of the electrode terminal faces downward in the gravitational direction. In this case, if the battery cell is directly supported by the case in a direction opposite to the gravity direction, when the battery disposed on the chassis of the electric vehicle is impacted by a collision or a foreign object, the case may be deformed by the impact force, and the battery cell may be damaged, resulting in an impact on the electrode cell, thereby causing an accident such as a fire or explosion. Here, the damage is not only mechanical damage but also dielectric damage. There is therefore a need to improve the mechanical and insulating protection capabilities of batteries when the battery cells are inverted.

In view of this, the present application provides a technical solution, a battery, including: a battery cell provided with an electrode terminal; the box body is used for accommodating the battery monomers; and a protection member disposed in the case, the protection member being disposed opposite to the electrode terminal, the protection member being configured to support the battery cell in a first direction opposite to a gravitational direction of the battery cell and to protect the electrode terminal.

Through setting up the guard member between electrode terminal and box, make guard member support the free part that is provided with electrode terminal of battery along the direction opposite to the direction of gravity, when the box receives external force impact, can utilize guard member to protect the battery monomer not destroyed, can strengthen electrode terminal's insulation protection moreover.

One embodiment of the present application provides an electrical device, a battery for providing electrical energy.

The technical solutions described in the embodiments of the present application are applicable to various devices using batteries, for example, mobile phones, portable devices, notebook computers, battery cars, electric toys, electric tools, electric vehicles, ships, spacecraft, and the like, and for example, spacecraft include airplanes, rockets, space shuttles, spacecraft, and the like.

It should be understood that the technical solutions described in the embodiments of the present application are not limited to the above-described devices, but may be applied to all devices using batteries, but for simplicity of description, the following embodiments are described by taking an electric vehicle as an example.

For example, as shown in fig. 1, a schematic structural diagram of a vehicle 100 according to an embodiment of the present application, the vehicle 100 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. A motor 2, a controller 3, and a battery 1 may be provided inside the vehicle 100, and the controller 3 is configured to control the battery 1 to supply power to the motor 2. For example, the battery 1 may be provided at the bottom or the head or the tail of the vehicle 100. The battery 1 may be used for power supply of the vehicle 100, for example, the battery 1 may be used as an operating power source for the vehicle 100, for circuitry of the vehicle 100, for example, for operating power requirements at start-up, navigation and operation of the vehicle 100. In another embodiment of the present application, the battery 1 may not only serve as an operating power source for the vehicle 100, but also as a driving power source for the vehicle 100, instead of or in part instead of fuel oil or natural gas, to provide driving power for the vehicle 100.

To meet different power requirements, the battery 1 may include a plurality of battery cells 10, wherein the plurality of battery cells 10 may be connected in series or parallel or in series-parallel, and the series-parallel refers to a mixture of series and parallel.

For example, as shown in fig. 2, a schematic perspective view of a battery 1 according to an embodiment of the present application is shown. The battery 1 includes a plurality of battery cells 10, and the plurality of battery cells 10 can be arranged in a second direction X and a third direction Y, wherein the second direction X is orthogonal to the third direction Y. That is, the plurality of battery cells 10 in the battery 1 may be arranged in a matrix-like structure. Alternatively, the battery 1 may have only one battery cell 10, or have a plurality of battery cells 1 arranged in the second direction X, or have a plurality of battery cells 10 arranged in the third direction Y. The battery 1 may further include a case 50 having a hollow structure inside the case 50, and the plurality of battery cells 10 are accommodated in the case 50. As shown in fig. 2, the case 50 may include two parts, referred to herein as an upper cover 51 and a case 52, respectively. The upper cover 51 and the case 52 are fastened together. The shape of the upper cover 51 and the case 52 may be determined according to the shape of the combination of the plurality of battery cells 10. For example, the upper cover 51 and the case 52 may be hollow rectangular parallelepiped, and only one surface of each case is an open surface, the opening of the upper cover 51 and the opening of the case 52 are disposed opposite to each other, and the upper cover 51 and the case 52 are fastened to each other to form the case 50 having a closed chamber. The upper cover 51 may be a rectangular parallelepiped having an opening and the case 52 may be a plate-like case, or the case 52 may be a rectangular parallelepiped having an opening and the upper cover 51 may be a plate-like case, and the upper cover 51 and the case 52 may be disposed so as to face each other and be engaged with each other to form the case 50 having a closed chamber. The plurality of battery cells 10 are connected in parallel or in series-parallel, and then placed in a box 50 formed by buckling an upper cover 51 and a box shell 52.

As shown in fig. 3, a schematic bottom view of the battery of fig. 2 is shown. As shown in fig. 4, a schematic view of the section I-I of fig. 3 is shown. Fig. 5 is an enlarged schematic view of a portion a in fig. 4, which is a schematic view of a structure of a range of 2 battery cells 10 according to an embodiment of the present application, fig. 6 is an enlarged schematic view of a portion B in fig. 4, which is a schematic view of a connection manner of the protection member 30 and the cover part 20 of the battery cell 10.

As shown in fig. 5, the battery cell 10 includes a cover member 20, a case 21, two electrode terminals 22 of opposite polarities, and one or more electrode assemblies (not shown) provided in the case 21. The case 21 may be a hollow rectangular parallelepiped or square or cylindrical shape, for example, depending on the shape of the electrode assembly or assemblies, and the case 21 is a hollow rectangular parallelepiped in fig. 5. The case 21 has an opening so that one or more electrode assemblies can be placed in the case 21 from the opening, and the opening is closed with the cover member 20. The housing 21 is filled with an electrolyte, such as an electrolytic solution. In fig. 5, it is shown that the case 21 has an opening at one end in the first direction Z, the battery cell 10 has one cover member 20 to close the opening of the case 21, and two electrode terminals 22, which are opposite in polarity, are formed at the one cover member 20. But it is also possible that the battery cell 10 has openings at both ends of the case 21 in the first direction Z, and has two cover members 20 to close the two openings of the case 21. The two electrode terminals 22 having opposite polarities may be formed at the two cover members 20, respectively. The first direction Z is a direction opposite to the gravity direction, and in fig. 5, the gravity direction is a direction from top to bottom in the drawing, and the first direction Z is orthogonal to both the second direction X and the third direction Y. The electrode terminal 22 may have various shapes such as a cylindrical shape, a rectangular parallelepiped shape, a square shape, and a polygonal column shape, and the electrode terminal 22 shown in the present embodiment has a rectangular parallelepiped structure.

As shown in fig. 4 and 5, the cover member 20, the shielding member 30, and the case 52, on which the electrode terminals 22 are formed, are sequentially provided from top to bottom in the gravitational direction. In this case where the battery cell 10 is disposed in the case 50 such that at least a portion of the electrode terminal 22 is directed downward, if the battery cell 10 is directly supported from below to above by the case 52, when the case 52 is impacted by an external force from below, the case 52 may be deformed by the impact force, and the electrode terminal 22 disposed on the lid member 20 of the battery cell 10 may be impacted, thereby affecting the performance of the battery cell 10, and even causing the battery cell 10 to be broken, causing accidents such as fire and explosion.

In the present application, by providing the protection member 30 between the electrode terminal 22 and the case 52, the protection member 30 supports the battery cell 10 in the direction opposite to the gravitational direction, that is, in the first direction Z from bottom to top, and when the case 52 is impacted by an external force from below, the protection member 30 can protect the battery cell 10, and can deform to absorb impact energy, so that the protection member 30 can protect the battery cell 10 from damage, and the insulation protection of the electrode terminal 22 can be enhanced.

As shown in fig. 5, the cover member 20 has a center portion 201 and side portions 202 located on both sides of the center portion 201 in the second direction X, and the electrode terminals 22 are provided in the center portion 201. Wherein the second direction X is orthogonal to the first direction Z.

The shielding member 30 has a shielding portion 301 provided opposite to the central portion 201 in the second direction X, and a supporting portion 302 connected to the shielding portion 301, the supporting portion 302 for supporting the side portion 202 in the first direction Z.

In the first direction Z, a gap 300 is provided between the guard portion 301 and the central portion 201. By forming this gap 300 between the shielding portion 301 of the shielding member 30 and the central portion 201 of the cover part 20, the shielding member 30 can be allowed to deform when receiving an impact from the first direction Z to absorb impact energy. In order to prevent the electrode terminal 22 provided in the central portion 201 of the cover member 20 from interfering with the guard portion 301 of the guard member 30, it is preferable that a gap of 3mm or more exists between the electrode terminal 22 and the guard portion 301.

Further, in the first direction Z, the central portion 201 of the cover member 20 is provided to protrude toward the guard portion 301 as compared to the side portions 202. As a result, a gap 310 is formed between the central portion 201 of the lid member 20 and the internal components of the battery cell 10, and therefore, the internal structure of the battery cell 10 can be protected even when the lid member 20 of the battery cell 10 is impacted.

As shown in fig. 5, in the cover part 20, the central portion 201 protrudes toward the guard portion 301 of the guard member 30 in the first direction Z as compared to the two side portions 202. Thereby, a height difference in the first direction Z is formed between the side portion 202 and the central portion 201 of the cover member 20. In the first direction Z, the support portion 302 of the shielding member 30 is provided extending from the shielding portion 301 toward the side portion 202 of the cover part 20. In fig. 5, the support portion 302 of the shield member 30 is perpendicular to the shield portion 301, but the present embodiment is not limited to this, and the support portion 302 may be extended from the shield portion 301 toward the side portion 202 to support the side portion 202, and may not be perpendicular to the shield portion 301. Thus, the support portion 302 of the protection member 30 can be disposed using the space formed by the height difference between the side portion 202 and the center portion 201, so that the space utilization can be improved, and the number of battery cells 10 disposed in the limited space can be increased.

As shown in fig. 5, the cover part 20 further includes a pressure release mechanism 203 for releasing the internal pressure or temperature of the battery cell 10 when the internal pressure or temperature reaches a threshold value, and the protection member 30 is provided with an exhaust port 303 at a position opposite to the pressure release mechanism 203. The pressure release mechanism 203 refers to an element or component that actuates to release the internal pressure or temperature of the battery cell 10 when the internal pressure or temperature reaches a predetermined threshold. The threshold design varies according to design requirements. The threshold value may depend on the material of one or more of the positive electrode tab, the negative electrode tab, the electrolyte, and the separator in the battery cell 10. The pressure release mechanism 203 may take the form of, for example, an explosion-proof valve, a gas valve, a pressure release valve, or a safety valve, and may specifically take the form of a pressure-sensitive or temperature-sensitive element or structure, that is, when the internal pressure or temperature of the battery cell 10 reaches a predetermined threshold, the pressure release mechanism 203 performs an action or a weak structure provided in the pressure release mechanism 203 is broken, thereby forming an opening or passage through which the internal pressure or temperature can be released.

As referred to herein, "actuated" refers to the pressure relief mechanism 203 being actuated or activated to a state such that the internal pressure and temperature of the battery cell 10 is relieved. The actions generated by pressure relief mechanism 203 may include, but are not limited to: at least a portion of the pressure relief mechanism 203 breaks, tears, opens, etc. Upon actuation of the pressure release mechanism 203, the high temperature and high pressure substances inside the battery cell 10 may be discharged as emissions from the actuated location. In this way, the pressure and temperature of the battery cell 10 can be relieved under controlled pressure or temperature conditions, thereby avoiding potentially more serious accidents.

Emissions mentioned in this application include, but are not limited to: electrolyte, dissolved or split positive and negative electrode plates, fragments of a separator, high-temperature and high-pressure gas generated by reaction, flame, and the like.

By forming the exhaust port 303 in the protection member 30, air can be easily introduced and exhausted, and the heat generated from the thermal runaway battery cell 10 can be prevented from further diffusing to the adjacent battery cell 10, and heat insulation and fire prevention can be realized by the protection member when thermal runaway occurs.

As shown in fig. 6, the shielding member 30 supports the cover part 20 from below upward in the first direction Z via the thermal management part 60. The shielding member 30 may also be in direct contact with the cover part 20 to support the cover part 20, or the shielding member 30 may also be fixed to the cover part 20, for example, adhered to the cover part 20 with an adhesive or the like.

The thermal management component 60 is for containing a fluid to regulate the temperature of the battery cell 10. The fluid may be a liquid or a gas, and the temperature adjustment means heating or cooling the battery cell 10. In the case of cooling or cooling the battery cells 10, the thermal management member 60 is used to contain a cooling fluid to lower the temperature of the battery cells 10, and at this time, the thermal management member 60 may also be referred to as a cooling member, a cooling system, a cooling plate, or the like, and the fluid contained therein may also be referred to as a cooling medium or cooling fluid, and more specifically, may be referred to as a cooling liquid or cooling gas. In addition, the thermal management component 60 may also be used for heating to warm up the battery cell 10, which is not limited in this embodiment. Alternatively, the fluid may be circulated to achieve better temperature regulation. Alternatively, the fluid may be water, a mixture of water and ethylene glycol, or air, etc.

As shown in fig. 7, a bottom view of the battery 1 of fig. 2 with the case 52 removed is shown. As shown in fig. 8, a part C of the securing portion of the shield member 30 in fig. 7 is enlarged. As shown in FIG. 9, a schematic view of section II-II of FIG. 7 is shown. Fig. 10 is an enlarged schematic view of the portion D in fig. 9.

As shown in fig. 7 and 8, the shielding member 30 includes a fixing portion 305, and the fixing portion 305 is used to fix the shielding member 30 to the case 50. The shielding member 30 is provided with a fixing portion 305 along at least one side of the second direction X, and the fixing portion 305 is provided protruding toward the outside of the shielding member 30 along the second direction X. In fig. 7, 3 sets of shielding members 30 are shown arranged in the second direction X, in the shielding member 30 on the left side in fig. 7, the fixing portions 305 provided on the right side are provided to protrude outward, in the shielding member 30 on the right side in fig. 7, the fixing portions 305 provided on the left side are provided to protrude outward, and in the shielding member 30 in the center in fig. 7, the fixing portions 305 provided on the left and right sides, respectively, are provided to protrude outward. Fig. 7 shows an example in which 3 fixing portions 305 are provided on the sheathing member 30 covering 10 battery cells 10 arranged in the third direction Y, but the number of fixing portions 305 is not limited as long as the sheathing member 30 can be firmly fixed to the case 50.

In order to mount the shielding member 30, as shown in fig. 10, the case 50 includes a mounting portion 204, and the mounting portion 204 is fixedly connected to a fixing portion 305. The mounting portion 204 may be, for example, a beam 70 provided on the upper cover 51 of the case 50. Although fig. 10 shows an example in which the guard member 30 and the beam 70 are fixedly connected by bolts 80, the guard member 30 and the case 50 may be connected by other means such as bonding or caulking.

Thus, the securing portion 305 protruding outward in the second direction X is formed in the shielding member 30, the mounting portion 204 is formed in the case 50, and the securing portion 305 and the mounting portion 204 are secured, so that the shielding member 30 and the case 50 can be firmly mounted and secured.

As shown in fig. 11, an outer surface of the sheathing member 30 covering the plurality of battery cells 10 is schematically illustrated. As shown in fig. 12, a schematic view of the inner surface of the guard member 30 shown in fig. 11 is shown, and a honeycomb structure is shown as an example of the buffer structure 40. As shown in fig. 13, an enlarged schematic view of the E portion of the honeycomb structure shown in fig. 12 is shown.

When the battery 1 has a plurality of battery cells 10, as shown in fig. 11, the shielding member 30 is configured to cover the plurality of battery cells 10. Fig. 2 shows a structure in which a plurality of battery cells 10 are regularly arranged in the second direction X and the third direction Y in the battery 1. In this case, by disposing the protection member 30 so as to cover the plurality of battery cells 10 accordingly, impact protection can be provided to the battery cells 10 in a wide range.

When the shielding member 30 covers the plurality of battery cells 10 regularly arranged in the second direction X and the third direction Y as shown in fig. 11, the shielding member 30 is formed with an exhaust port 303 at a position opposite to the pressure release mechanism 203 of each battery cell 10, and a gas passage 304 is formed between the shielding member 30 and the cover part 20 as shown in fig. 12 and 13. The gas passages 304 are located between the support portions 302 adjacent in the second direction X. In the case where the plurality of battery cells 10 shown in fig. 11 are arranged in the third direction Y, the support part 302 also extends in the third direction Y. Between the support portions 302 extending in the third direction Y, gas passages 304 that communicate the plurality of exhaust ports 303 are formed. The exhaust discharged from the pressure release mechanism 203 from the thermal runaway battery cell 10 can thereby be easily guided to the exhaust port 303, and gas introduction and exhaust can be efficiently achieved.

As shown in fig. 12 and 13, the shielding member 30 is provided with a buffer structure 40 at a surface opposite to the electrode terminal 22, and the buffer structure 40 is formed by forming a plurality of reinforcing ribs in a honeycomb shape. Such a honeycomb structure can strengthen the rigidity of the shielding member 30, and can absorb impact energy when the shielding member 30 is impacted, maintaining the structural stability of the shielding member 30. Further, as shown in fig. 13, since the gas passage 304 communicating with the gas outlet 303 is formed in the shielding member 30, the relief space is formed in the portion of the honeycomb-shaped buffer structure 40 facing the electrode terminal 22, and thus the buffer structure 40 can be prevented from contacting or interfering with the electrode terminal 22. The buffer structure 40 is not limited to such a honeycomb structure, and may be a structure in which a silicone rubber plate or the like is attached to the surface of the protection member 30 facing the battery cell 10, and for example, the silicone rubber plate is formed with the exhaust port 303 and the gas passage 304.

An embodiment of the present application also provides an electric device, which may include the battery 1 in the foregoing embodiments. The battery 1 is used in the power utilization device for supplying electric power.

Having described the battery and the power consumption device of the embodiments of the present application above, the method and the device for manufacturing the battery of the embodiments of the present application will be described below, wherein the foregoing embodiments may be referred to for a part that is not described in detail.

Fig. 14 shows a schematic flow chart of a method 400 of preparing a battery according to one embodiment of the present application. As shown in fig. 14, the method 400 may include:

410, providing a battery cell 10, the battery cell 10 being provided with an electrode terminal 22;

420, providing a box 50, wherein the box 50 is used for accommodating the battery cells 10; and

430, providing a shielding member 30, the shielding member 30 being disposed in the case 50, the shielding member 30 being disposed opposite to the electrode terminal 22,

wherein the shielding member 30 is configured to support the battery cell 10 in a first direction Z opposite to a gravitational direction of the battery cell 10 and form a shield to the electrode terminal 22.

Fig. 15 shows a schematic block diagram of an apparatus 500 for preparing a battery according to an embodiment of the present application. As shown in fig. 15, an apparatus 500 for preparing a battery may include: a first providing module 510, a second providing module 520, a third providing module 530, and a mounting module 540.

A first providing module 510 for providing the battery cell 10 provided with the electrode terminal 22;

a second providing module 520 for providing a case 50 accommodating the battery cells 10;

a third providing module 530 for providing the shielding member 30; and

the mounting module 540 is configured such that the shielding member 30 is disposed in the case 50 such that the shielding member 30 is disposed opposite to the electrode terminal 22, and the shielding member 30 is configured to support the battery cell 10 in a first direction Z opposite to a gravitational direction of the battery cell 10 and form a shielding for the electrode terminal 22.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and are not limiting thereof; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may be modified or some technical features may be replaced with other technical solutions, which may not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

A battery, comprising:

a battery cell provided with an electrode terminal;

the box body is used for accommodating the battery monomers;

and a protection member disposed in the case, the protection member being disposed opposite to the electrode terminal, the protection member being configured to support the battery cell in a first direction opposite to a gravitational direction of the battery cell and to protect the electrode terminal.
The battery of claim 1, wherein the battery comprises a plurality of cells,

the protection member is configured to be capable of being deformed to absorb impact energy when being impacted by an external force.
The battery according to claim 1 or 2, wherein,

the guard member includes a cushioning structure for absorbing impact energy when the guard member is impacted.
The battery according to claim 3, wherein,

the buffer structure is formed at a surface of the protection member opposite to the battery cell.
The battery according to any one of claims 1 to 4, wherein,

the battery cell has a cover part, the electrode terminal is disposed at the cover part, and the shielding member is configured to support the cover part in the first direction.
The battery of claim 5, wherein the battery comprises a battery cell,

the cover member has a central portion, the electrode terminals are disposed at the central portion, the shielding member has a shielding portion disposed opposite to the central portion, and a gap is provided between the shielding portion and the central portion in the first direction.
The battery according to claim 6, wherein the central portion is provided to protrude toward the shielding portion in the first direction.
The battery according to any one of claims 5 to 7, wherein the cover member further includes side portions located on both sides of the central portion in a second direction orthogonal to the first direction, and the shielding member further includes a support portion connected to the shielding portion, the support portion being configured to support the side portions in the first direction.
The battery of claim 8, wherein the support extends toward the side in the first direction.
The battery of claim 8, further comprising:

a thermal management component for containing a fluid to regulate temperature of the battery cells;

wherein the support portion is configured to support the side portion in the first direction by the thermal management component.
The battery according to any one of claims 5 to 10, wherein,

the cover part further includes a pressure release mechanism for being actuated to release the internal pressure of the battery cell when the internal pressure or temperature reaches a threshold value, and the protection member is provided with an exhaust port at a position opposite to the pressure release mechanism.
The battery according to claim 11, wherein a gas passage is formed between the shielding member and the cover member, the gas passage communicating with the exhaust port.
The battery according to any one of claims 1 to 12, wherein,

the protective member includes a fixing portion for fixing the protective member to the case.
The battery according to claim 13, wherein the shielding member is provided with the fixing portion along at least one side of a second direction orthogonal to the first direction, the fixing portion being provided protruding toward an outside of the shielding member along the second direction.
The battery according to claim 13 or 14, wherein,

the box body comprises an installation part, and the installation part is fixedly connected with the fixing part.
The battery according to any one of claims 1 to 15, wherein,

the battery has a plurality of the battery cells, and the protection member is configured to cover the plurality of battery cells.
An electrical device comprising the battery of any one of claims 1 to 16 for providing electrical energy.
A method of making a battery comprising:

providing a battery cell provided with an electrode terminal;

providing a box body for accommodating the battery cells; and

providing a protective member disposed in the case, the protective member being disposed opposite to the electrode terminal,

wherein the shielding member is configured to support the battery cell in a first direction opposite to a gravitational direction of the battery cell and to form a shield for the electrode terminal.
An apparatus for preparing a battery, comprising:

a first providing module for providing a battery cell provided with an electrode terminal;

the second providing module is used for providing a box body for accommodating the battery cells;

a third providing module for providing a protective member; and

and the mounting module is used for arranging the protection component in the box body, enabling the protection component to be opposite to the electrode terminal, and configuring the protection component to support the battery cell along a first direction and form protection for the electrode terminal, wherein the first direction is opposite to the gravity direction of the battery cell.