CN116093515A

CN116093515A - Battery and electricity utilization device

Info

Publication number: CN116093515A
Application number: CN202310377119.XA
Authority: CN
Inventors: 聂楚君; 许枭; 吴玉婷
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2023-04-11
Filing date: 2023-04-11
Publication date: 2023-05-09
Anticipated expiration: 2043-04-11
Also published as: CN116093515B

Abstract

The application is applicable to the technical field of power batteries and provides a battery and an electric device. The battery comprises at least one battery cell; the protection plate comprises a plate body and a plurality of ribs arranged in the plate body, the plate body comprises a first wall and a second wall which are oppositely arranged, and the first wall is arranged close to the battery cell relative to the second wall; the rib is connected between the first wall and the second wall, the rib is obliquely arranged relative to the first wall and the second wall, and a cavity is formed between at least one of the first wall and the second wall and at least two ribs. The battery can solve the problems that the rigidity of the bottom of the battery is weak and the battery monomer is easy to deform under impact.

Description

Battery and electricity utilization device

Technical Field

The present disclosure relates to battery technology, and particularly to a battery and an electric device.

Background

Energy conservation and emission reduction are key to sustainable development of the automobile industry, and electric vehicles become an important component of sustainable development of the automobile industry due to the energy conservation and environmental protection advantages of the electric vehicles. For electric vehicles, battery technology is an important factor in the development of the electric vehicles.

Lithium batteries used in electric vehicles are commonly referred to as power batteries. In the running process of the electric automobile, due to insufficient bottom rigidity of the battery, the battery monomer in the battery can be impacted by foreign matters at the bottom of the automobile to cause deformation.

Disclosure of Invention

In view of this, the embodiments of the present application provide a battery and an electric device, which can improve the problems of weak rigidity of the bottom of the battery and easy deformation of the battery cell due to impact.

Embodiments of a first aspect of the present application provide a battery, comprising:

at least one battery cell;

the protection plate is fixed on one side of the battery cell and comprises a plate body and a plurality of ribs arranged in the plate body, wherein the plate body comprises a first wall and a second wall which are oppositely arranged, and the first wall is close to the battery cell relative to the second wall; the ribs are connected between the first wall and the second wall and are obliquely arranged relative to the first wall and the second wall, and a cavity is formed between at least one of the first wall and the second wall and at least two ribs.

The battery provided by the embodiment of the application comprises the battery monomer and the protection plate, wherein the cavity in the protection plate can play a role in absorbing energy, so that the impact force on the battery monomer is reduced; and, because the rib slope sets up between first wall and second wall, the rib can decompose the force that bears on the guard plate, makes the power transmission to the big face of battery case, further reduces the probability that the battery warp and damage. Therefore, the battery can solve the problems of weak rigidity of the bottom of the battery and easy deformation of the battery monomer due to impact, reduce the risk of short circuit and fire of the internal pole piece caused by too large invasion amount of the battery monomer, and improve the safety performance of the battery.

In some embodiments, the connection between the ribs and the first wall and the side wall of the battery cell are arranged correspondingly, so that the force born by the protection plate is transmitted to the edge of the battery cell.

Through adopting above-mentioned technical scheme, the rib can decompose the power and transmit partial power to the stronger marginal area of battery monomer rigidity when transmitting the power, has reduced the probability that the battery monomer warp.

In some embodiments, the cavity includes a first energy absorbing cavity disposed directly opposite the middle of the battery cell.

Through adopting above-mentioned technical scheme, set up first energy-absorbing chamber in the position that the guard plate corresponds battery monomer middle part, can effectively play the guard action to the battery monomer, reduce the probability that the battery monomer warp.

In some embodiments, the first energy absorption cavity is formed between two adjacent ribs, the first wall and the second wall, and the two ribs are respectively disposed corresponding to the two side walls of the battery cell.

Through adopting above-mentioned technical scheme, first energy-absorbing chamber is the polygon chamber that corresponds the setting with battery monomer middle part, has great space, can play effectual energy-absorbing effect.

In some embodiments, the first energy absorbing cavity has a first end proximate the first wall and a second end proximate the second wall, the first end having a width that is greater than a width of the second end.

By adopting the technical scheme, the ribs forming the first energy absorption cavity can transmit the external force towards the direction of the side wall, so that the impact of the external force on the middle part of the battery cell is reduced; the structural strength at the side wall is greater, so that the deformation probability of the battery cell is smaller.

In some embodiments, the cavity further comprises a second energy absorbing cavity disposed adjacent to the first energy absorbing cavity, the second energy absorbing cavity being configured to be disposed directly opposite an edge of the battery cell.

Through adopting above-mentioned technical scheme, the battery can utilize the free edge of second energy-absorbing chamber protection battery, reduces the free edge of battery and receives the probability that external force takes place to warp.

In some embodiments, the second energy absorbing cavity is formed between two adjacent ones of the ribs and the second wall.

By adopting the technical scheme, on the basis that the first energy-absorbing cavity is arranged in the protection plate, the second energy-absorbing cavity can effectively utilize the inner space of the protection plate, so that the second energy-absorbing cavity is reasonable in shape and has a larger space.

In some embodiments, the cross section of the first energy absorbing cavity is trapezoidal, and the cross section of the second energy absorbing cavity is triangular.

By adopting the technical scheme, the first energy absorption cavity corresponds to the middle part of the battery cell and is mainly used for absorbing energy; the second energy-absorbing cavity corresponds to the edge of the battery monomer, and is the position with the greatest rigidity at the bottom of the battery monomer, and the second energy-absorbing cavity is mainly used for force transmission, so that the deformation probability of the battery monomer is reduced to the greatest extent.

In some embodiments, the cavity comprises a plurality of the first energy absorbing cavities and a plurality of the second energy absorbing cavities, and the first energy absorbing cavities and the second energy absorbing cavities are sequentially and alternately arranged.

Through adopting above-mentioned technical scheme, the guard plate can protect a plurality of battery monomers simultaneously.

In some embodiments, the plurality of ribs includes a first rib extending from the first wall along a first oblique direction and a second rib extending from the first wall along a second oblique direction, the first oblique direction being disposed at a right angle or an obtuse angle to the second oblique direction.

Through adopting above-mentioned technical scheme, the inclination of first rib is different with the second rib, can avoid the rib that the single direction slope set up to reduce the deformability of plate body.

In some embodiments, the first oblique direction and the second oblique direction are symmetrically disposed with respect to a thickness direction of the plate body.

By adopting the technical scheme, the deformation resistance of the plate body is better, and the strength is higher.

In some embodiments, the first ribs and the second ribs alternate in sequence.

By adopting the technical scheme, the first energy absorption cavities and the second energy absorption cavities in the plate body are alternately arranged, so that the middle and the edges of the battery cells are respectively protected.

In some embodiments, the protection plate further comprises a thermal management component, the thermal management component is arranged between the first wall and the battery cell, a flow passage for circulating a heat exchange medium is arranged in the thermal management component, and the extending direction of the flow passage is parallel to or intersects with the extending direction of the cavity.

By adopting the technical scheme, the protection plate integrates the heat management component, so that the height space of the battery and the weight of the water cooling structure are saved; the extending direction of the flow channel can be flexibly set according to the arrangement direction of the battery monomers.

In some embodiments, a recess is provided in the first wall, and the thermal management component is received within the recess.

Through adopting above-mentioned technical scheme, the recess is used for holding thermal management part to further save the space that highly space and thermal management part of battery occupy, promoted the effective volume utilization ratio of battery, be favorable to promoting the energy density of battery.

In some embodiments, the height of the thermal management component is less than or equal to the depth of the groove.

Through adopting above-mentioned technical scheme, when the guard plate received external force impact, because the first wall laminating battery monomer of plate body, can play effectual guard action.

In some embodiments, the grooves are filled with glue, and the thermal management component is adhered to the plate body through the glue.

Through adopting above-mentioned technical scheme, accessible colloid fixed connection thermal management part and plate body, the thickness of still accessible control colloid realizes thermal management part and first wall's surface parallel and level.

In some embodiments, the first wall is provided with a plurality of grooves which are parallel and are arranged at intervals, the thermal management component comprises a plurality of heat exchange pipes, the flow channels are arranged in the heat exchange pipes, and the heat exchange pipes are arranged in the grooves in a one-to-one correspondence.

Through adopting above-mentioned technical scheme, can realize the integration of thermal management part and plate body, save the altitude space of battery, be favorable to promoting the energy density of battery.

In some embodiments, one side of the thermal management component is adhesively bonded to the surface of the first wall and the other side of the thermal management component is adhesively bonded to the battery cell.

Through adopting above-mentioned technical scheme, the guard plate is in the same place through colloid and battery monomer bonding, has promoted torsion and bending rigidity of whole battery, can adapt to more abominable operating mode, can promote product competitiveness through more harsher vibration impact test.

In some embodiments, the surface of the thermal management component facing away from the plate body is provided with ventilation grooves penetrating through opposite ends of the thermal management component and arranged opposite to the explosion-proof valves of the battery cells.

Through adopting above-mentioned technical scheme, can make things convenient for explosion-proof valve and external intercommunication, promote the security of battery, and saved the inside space of battery.

In some embodiments, the direction of extension of the flow channel perpendicularly intersects the direction of extension of the cavity.

By adopting the technical scheme, the heat management component improves the bending rigidity of the protection plate in the length direction, and further strengthens the strength of the plate body.

In some embodiments, the battery cell includes a case and an electrode assembly disposed within the case, the case including top and bottom walls disposed opposite each other, and two first and second sidewalls connected between the top and bottom walls, the two first sidewalls disposed opposite each other along a first direction and the two second sidewalls disposed opposite each other along a second direction, the first direction intersecting the second direction, the first sidewall having an area greater than an area of the second sidewall; the first wall of the protection plate and the bottom wall are arranged opposite to each other, and the extending direction of the cavity is parallel to the second direction.

Through adopting above-mentioned technical scheme, the first wall and the diapire of guard plate are just to setting, and the extending direction of cavity is on a parallel with the second direction, and the cavity has played the effect of energy-absorbing, and the guard plate can improve that battery bottom rigidity is weak, bottom ball hits the problem that warp greatly.

In some embodiments, the battery includes a plurality of rows of the battery cells, a plurality of the battery cells in each row of the battery cells being arranged along the first direction, and a plurality of rows of the battery cells being arranged along the second direction; the cavity extends to opposite ends of the plate body along the second direction.

Through adopting above-mentioned technical scheme, every cavity can correspond a plurality of battery monomers simultaneously to the through-hole is through the relative both ends of plate body, and easy manufacture.

In some embodiments, the battery further comprises a bottom guard plate, the guard plate being disposed between the battery cell and the bottom guard plate.

By adopting the technical scheme, the bottom guard plate is used for protecting the battery monomer and the guard plate, and a protective barrier is added for the battery.

Embodiments of the second aspect of the present application provide an electrical device comprising a battery as provided in the first aspect.

The foregoing description is only an overview of the technical solutions of the present application, and may be implemented according to the content of the specification in order to make the technical means of the present application more clearly understood, and in order to make the above-mentioned and other objects, features and advantages of the present application more clearly understood, the following detailed description of the present application will be given.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the description of the embodiments or the conventional technology will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained according to these drawings without inventive effort for a person of ordinary skill in the art.

FIG. 1 is a schematic illustration of a vehicle provided in some embodiments of the present application;

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

fig. 3 is a partial enlarged view of a portion a of the battery shown in fig. 2;

fig. 4 is a schematic perspective view of a protection plate according to a second embodiment of the present disclosure;

fig. 5 is a partial enlarged view of a portion B of the shielding plate shown in fig. 4;

fig. 6 is an exploded perspective view of the fender panel shown in fig. 4;

fig. 7 is a schematic perspective view of a battery provided in a third embodiment of the present application;

fig. 8 is a schematic perspective view of a battery provided in a fourth embodiment of the present application;

fig. 9 is an exploded perspective view of the battery shown in fig. 8;

fig. 10 is a schematic perspective view of a battery provided in embodiment five of the present application;

fig. 11 is an exploded perspective view of the battery shown in fig. 10;

Fig. 12 is an exploded view of a battery provided in embodiment six of the present application;

fig. 13 is a partial enlarged view of a portion C of the battery shown in fig. 12;

fig. 14 is a partial enlarged view of the portion D of the battery shown in fig. 12.

The meaning of the labels in the figures is:

1000. a vehicle;

100. a battery;

10. a protection plate;

11. a plate body; 111. a first wall; 1111. a groove; 112. a second wall;

121. ribs; 1211. a first rib; 1212. second ribs;

122. a cavity; 1221. a first energy absorbing cavity; 1222. a second energy absorbing cavity;

13. a thermal management component; 131. a heat exchange tube; 132. a flow passage; 133. a vent groove;

20. a battery cell; 21. a housing; 211. a top wall; 212. a bottom wall; 213. a first sidewall; 214. a second sidewall;

30. a bottom guard board;

x, a first direction; y, second direction; z, third direction.

Detailed Description

Embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical solutions of the present application, and thus are only examples, and are not intended to limit the scope of protection 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 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.

In the description of the embodiments of the present application, the technical terms "first," "second," etc. are used merely to distinguish between different objects and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, a particular order or a primary or secondary relationship. In the description of the embodiments of the present application, the meaning of "plurality" is two or more unless explicitly defined otherwise.

Reference herein 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 present 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 appreciate that the embodiments described herein may be combined with other embodiments.

In the description of the embodiments of the present application, the term "and/or" is merely an association relationship describing an association object, which means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

In the description of the embodiments of the present application, the term "plurality" 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).

In the description of the embodiments of the present application, the orientation or positional relationship indicated by the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are orientation or positional relationship based on the drawings, and are merely for convenience of describing the embodiments of the present application and simplifying the description, and are not intended to indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present application.

In the description of the embodiments of the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; or may be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to the specific circumstances.

Currently, in the running process of an electric automobile, due to insufficient bottom rigidity of a battery, a battery cell in the battery may be deformed due to impact of foreign matters on the bottom of the automobile.

According to research, the metal plate protection support is arranged at the bottom of the battery of some electric automobiles, and can only play a part of energy absorption effect for high-energy ball striking, so that the problems of weak rigidity of the bottom of the battery and large deformation of the bottom ball striking can not be effectively solved.

In view of this, the present application provides a battery and an electric device. The battery comprises at least one battery monomer and a protection plate fixed on one side of the battery monomer, wherein the protection plate comprises a plate body and a plurality of ribs arranged in the plate body, the plate body comprises a first wall and a second wall which are oppositely arranged, and the first wall is close to the battery monomer relative to the second wall; the ribs are connected between the first wall and the second wall and are obliquely arranged relative to the first wall and the second wall, and a cavity is formed between at least one of the first wall and the second wall and at least two ribs. The cavity in the protection plate can play a role in absorbing energy, so that the impact force on the battery monomer is reduced; and, because the rib slope sets up between first wall and second wall, the rib can decompose the power that bears on the guard plate, makes the power transmission to battery case's big face, further reduces battery deformation, reduces the battery monomer and causes the risk such as internal pole piece short circuit fire because of invasion volume is too big.

Embodiments of a first aspect of the present application provide a battery. The battery disclosed by the embodiment of the application can be used for an electric device using the battery as a power supply or various energy storage systems using the battery as an energy storage element. The power device may be, but is not limited to, a cell phone, tablet, notebook computer, electric toy, electric tool, battery car, electric car, ship, spacecraft, etc. 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 1000.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a vehicle 1000 according to some embodiments of the present application. The vehicle 1000 may be a fuel oil vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or a range-extended vehicle. The battery 100 is provided in the interior of the vehicle 1000, and the battery 100 may be provided at the bottom or the head or the tail of the vehicle 1000. The battery 100 may be used for power supply of the vehicle 1000, for example, the battery 100 may be used as an operating power source of the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, the controller 200 being configured to control the battery 100 to power the motor 300, for example, for operating power requirements during start-up, navigation, and travel of the vehicle 1000.

In some embodiments of the present application, battery 100 may not only serve as an operating power source for vehicle 1000, but may also serve as a driving power source for vehicle 1000, instead of or in part instead of fuel oil or natural gas, to provide driving power for vehicle 1000.

Referring to fig. 2 and 3, a battery 100 is provided according to an embodiment of the present application. The battery 100 includes at least one battery cell 20 and a shielding plate 10, and the shielding plate 10 is fixed to one side of the battery cell 20. The protection plate 10 comprises a plate body 11 and a plurality of ribs 121 arranged in the plate body 11, wherein the plate body 11 comprises a first wall 111 and a second wall 112 which are oppositely arranged, and the first wall 111 is arranged close to the battery cell 20 relative to the second wall 112; the ribs 121 are connected between the first wall 111 and the second wall 112, and the ribs 121 are disposed obliquely with respect to the first wall 111 and the second wall 112, and a cavity 122 is formed between at least one of the first wall 111 and the second wall 112 and at least two ribs 121.

The battery cells 20 may be one or more, and the plurality of battery cells 20 may be connected in series, parallel, or a series-parallel connection, where a series-parallel connection refers to that the plurality of battery cells 20 are connected in both series and parallel. The plurality of battery cells 20 can be directly connected in series or in parallel or in series-parallel, and then the whole formed by the plurality of battery cells 20 is accommodated in the box body; of course, the battery 100 may also be a form of a plurality of battery cells 20 connected in series or parallel or series-parallel to form a battery 100 module, and a plurality of battery 100 modules connected in series or parallel or series-parallel to form a whole and accommodated in a case. The battery 100 may further include other structures, for example, the battery 100 may further include a bus member for making electrical connection between the plurality of battery cells 20.

Wherein each battery cell 20 may be a secondary battery 100 or a primary battery 100; but not limited to, lithium sulfur battery 100, sodium ion battery 100, or magnesium ion battery 100. The battery cell 20 may be in the shape of a cylinder, a flat body, a rectangular parallelepiped, or other shapes, etc. In the present embodiment, the battery cell 20 is exemplified as a rectangular parallelepiped.

The protection plate 10 is fixed on one side of the battery cell 20, and is used for protecting the battery cell 20, so as to reduce the impact force on the bottom of the battery 100 on the battery cell 20. The protection plate 10 may be adhered to the bottom of the battery cell 20 by a glue, or may be fixed relative to the battery cell 20 by other fixing members.

The protection plate 10 comprises a plate body 11 and a plurality of ribs 121 arranged in the plate body 11, the plate body 11 and the ribs 121 can be made of plastic or metal, and the plate body 11 and the ribs 121 can be of an integrated structure, so that the manufacture is convenient.

The plate 11 may be substantially flat, and the plate 11 includes a first wall 111 and a second wall 112 disposed opposite to each other, where the first wall 111 is disposed near the battery cell 20 opposite to the second wall 112.

One end of each rib 121 is connected to the first wall 111, the other end is connected to the second wall 112, and the ribs 121 are obliquely arranged relative to the first wall 111 and the second wall 112, and as a plurality of ribs 121 are arranged in the plate body 11 at intervals, at least one rib 121 and at least two ribs 121 in the first wall 111 and the second wall 112 jointly enclose a cavity 122. That is, the cavity 122 may be formed between the first wall 111, the second wall 112 and the at least two ribs 121, and the cavity 122 may be a polygonal cavity; the cavity 122 may also be formed between one of the first wall 111 and the second wall 112 and the two ribs 121, in which case the cavity 122 may be a triangular cavity.

The battery 100 includes a battery unit 20 and a protection plate 10, when the bottom of the battery 100 is impacted by a foreign object, a part of impact force deforms a cavity 122 in the protection plate 10, so that energy is absorbed through the cavity 122, and a certain buffering effect is achieved on the battery unit 20; the ribs 121 can decompose a part of the impact force, and transmit the force to a large surface of the battery case, thereby further reducing the probability of deformation of the battery 100. The "large surface" of the battery case means a surface having a large area among the respective sides of the battery case.

The battery 100 provided by the embodiment of the application comprises the battery monomer 20 and the protection plate 10, wherein the cavity 122 in the protection plate 10 can play a role in absorbing energy, so that the impact force on the battery monomer 20 is reduced; in addition, since the ribs 121 are obliquely disposed between the first wall 111 and the second wall 112, the ribs 121 can decompose the force borne on the protection plate 10, so that the force is transferred to the large surface of the battery case, and the probability of deformation and damage of the battery 100 is further reduced. Therefore, the battery 100 can solve the problems of weak rigidity of the bottom of the battery 100 and easy deformation of the battery cell 20 due to impact, reduce the risk of short circuit and fire of the internal pole piece caused by too large invasion of the battery cell 20, and improve the safety performance of the battery 100. In addition, the protection plate 10 has a simple structure and low cost.

In some embodiments, ribs 121 are provided corresponding to the connection of the first wall 111 and the side wall of the battery cell 20 to transmit the force received on the protection plate 10 to the edge of the battery cell 20.

The bottom wall of the battery cell 20 is arranged opposite to the first wall 111 of the protection plate 10, and the side wall of the battery cell 20 is connected to one side of the bottom wall away from the protection plate 10. The connection between the rib 121 and the first wall 111 is the end of the rib 121 near the first wall 111. The connection of the rib 121 to the first wall 111 is arranged directly opposite to the side wall of the battery cell 20, i.e. the projection of the end of the rib 121 onto the first wall 111 at least partially overlaps the projection of the side wall onto the first wall 111.

Since the rib 121 is disposed obliquely with respect to the first wall 111 and the second wall 112, the pressure of the rib 121 against the first wall 111 can be decomposed into horizontal and vertical forces. Meanwhile, since the connection part of the rib 121 and the first wall 111 is disposed opposite to the side wall of the battery cell 20, the rib 121 can transmit the force on the protection plate 10 to the edge of the battery cell 20. Specifically, the ribs 121 can transmit force to the connection region between the bottom wall and the side wall of the battery cell 20, which has greater rigidity and is not easily deformed compared to the middle region of the battery cell 20. In this way, the ribs 121 can break down the force during the force transfer and transfer part of the force to the more rigid edge region of the cell 20, reducing the probability of deformation of the cell 20.

Alternatively, one side wall of the battery cell 20 corresponds to one rib 121, or two side walls of the battery cell 20 respectively correspond to one rib 121.

According to the embodiment of the application, the connection part of the rib 121 and the first wall 111 is arranged corresponding to the side wall of the battery cell 20, and the rib 121 can transmit force on the protection plate 10 to the connection part of the bottom wall and the side wall of the battery cell 20, so that the deformation probability of the middle part of the battery cell 20 is reduced.

In some embodiments, the cavity 122 includes a first energy absorbing cavity 1221, the first energy absorbing cavity 1221 being disposed directly opposite a central portion of the battery cell 20.

The "middle" of the battery cell 20 is located between the two sidewalls of the battery cell 20. The cavity 122 in the protection plate 10 comprises a first energy absorption cavity 1221, and the first energy absorption cavity 1221 is opposite to the middle part of the battery monomer 20, so that the first energy absorption cavity 1221 can absorb energy to reduce the impact of external force on the middle part of the battery monomer 20, and reduce the deformation of the middle part of the battery monomer 20 due to insufficient rigidity.

The first energy absorption cavity 1221 is disposed opposite to the middle of the battery cell 20, that is, the projection of the first energy absorption cavity 1221 on the first wall 111 overlaps the projection of the middle of the battery cell 20 on the first wall 111. Optionally, the projected area of the first energy absorption cavity 1221 on the first wall 111 may be the same as or different from the projected area of the middle part of the battery cell 20 on the first wall 111.

According to the embodiment of the application, the first energy absorption cavity 1221 is arranged at the position, corresponding to the middle part of the battery monomer 20, of the protection plate 10, so that the battery monomer 20 can be effectively protected, and the deformation probability of the battery monomer 20 is reduced.

As shown in fig. 3, the first energy absorption cavity 1221 is formed between two adjacent ribs 121, the first wall 111 and the second wall 112, and the two ribs 121 are disposed corresponding to two sidewalls of the battery cell 20, respectively.

The two ribs 121 forming the first energy-absorbing cavity 1221 are disposed correspondingly on two sidewalls of the battery cell 20, that is, the connection between each rib 121 and the first wall 111 corresponds to one sidewall of the battery cell 20, so that the projection of the first energy-absorbing cavity 1221 on the first wall 111 is located between the projections of a pair of sidewalls of the battery cell 20 on the first wall 111, and the first energy-absorbing cavity 1221 can be disposed opposite to the middle of the battery cell 20.

By adopting the above technical scheme, the first energy absorption cavity 1221 is a polygonal cavity corresponding to the middle part of the battery cell 20, has a larger space, and can play a role in effective energy absorption.

The shape of the first energy absorption cavities 1221 may also be other shapes, for example, the plurality of first energy absorption cavities 1221 are all triangular cavities and are sequentially arranged below the battery cells 20.

The first energy absorbing cavity 1221 has a first end adjacent the first wall 111 and a second end adjacent the second wall 112, the first end having a width greater than the width of the second end.

Specifically, the ribs 121 forming the first energy absorbing chamber 1221 are inclined from the second wall 112 toward the first wall 111 in a direction away from the middle of the battery cell 20 such that the width of the first end is greater than the width of the second end. In this way, the ribs 121 forming the first energy absorption cavity 1221 can transmit the external force towards the direction of the side wall, so as to reduce the impact of the external force on the middle part of the battery cell 20; the structural strength at the side walls is greater, so that the probability of deformation of the battery cell 20 is smaller.

With continued reference to fig. 3, the cavity 122 further includes a second energy absorbing cavity 1222 disposed adjacent to the first energy absorbing cavity 1221, and the second energy absorbing cavity 1222 is disposed opposite to the edge of the battery cell 20.

The "edges" of the battery cells 20 may include only the side walls, or may include both the partial area of the bottom wall adjacent to the side walls and the side walls. In some embodiments, the outer surface of the side wall and the outer surface of the bottom wall are connected by rounded corners, so that the connection of the side wall and the bottom wall is circular arc-shaped, which can enhance the rigidity of the edge of the battery cell 20.

The second energy absorbing cavity 1222 is disposed directly opposite the edge of the battery element 20, i.e., the projection of the second energy absorbing cavity 1222 onto the first wall 111 at least partially overlaps the projection of the edge of the battery element 20 onto the first wall 111. The second energy absorbing cavity 1222 can absorb energy to absorb part of external force, and can buffer and protect the edge of the battery cell 20.

Further, the second energy absorbing cavity 1222 is a triangular cavity, and the center of the second energy absorbing cavity 1222 may be disposed opposite to the side wall of the battery cell 20.

Through adopting above-mentioned technical scheme, the battery 100 that this application embodiment provided can utilize the edge of second energy-absorbing chamber 1222 protection battery monomer 20, reduces the probability that the edge of battery monomer 20 receives external force to take place to warp.

In some embodiments, a second energy absorbing cavity 1222 is formed between two adjacent tendons 121 and the second wall 112.

Because the second energy-absorbing cavity 1222 is formed between two adjacent ribs 121 and the second wall 112, the second energy-absorbing cavity 1222 is a triangular cavity, so that the second energy-absorbing cavity 1222 can effectively utilize the internal space of the protection plate 10 on the basis that the first energy-absorbing cavity 1221 is arranged in the protection plate 10, and the shape of the second energy-absorbing cavity 1222 is reasonable and has a larger space.

In other embodiments, the second energy absorbing cavity 1222 may also be formed between two adjacent tendons 121, the first wall 111, and the second wall 112.

As shown in fig. 3, in some embodiments, the first energy absorbing cavity 1221 is trapezoidal in cross-section and the second energy absorbing cavity 1222 is triangular in cross-section.

The cross section of the first energy-absorbing cavity 1221 refers to a cross section taken along a direction perpendicular to the first wall 111 and taken along a reference plane, the cross section of the first energy-absorbing cavity 1221 is trapezoidal, and the first energy-absorbing cavity 1221 includes a second end adjacent to the first wall 111 and adjacent to the second wall 112, and the width of the first end is smaller than the width of the second end. The cross-section of the second chamber is also a cross-section taken along a direction perpendicular to the first wall 111 as a reference plane.

Since the first energy absorbing chamber 1221 is disposed adjacent to the second energy absorbing chamber 1222, the first energy absorbing chamber 1221 and the second energy absorbing chamber 1222 are separated by the rib 121, and the space in the plate 11 can be reasonably utilized and the larger cavity 122 can be disposed as much as possible by setting the cross section of the first energy absorbing chamber 1221 to be trapezoidal and the cross section of the second energy absorbing chamber 1222 to be triangular. The first energy absorption cavity 1221 corresponds to the middle part of the battery cell 20 and is mainly used for absorbing energy; the second energy absorbing cavity 1222 corresponds to the edge of the battery monomer 20, which is the position with the greatest rigidity at the bottom of the battery monomer 20, and the second energy absorbing cavity 1222 is mainly used for force transmission, so that the deformation probability of the battery monomer 20 is reduced to the greatest extent, and the risks of short circuit and fire of an internal pole piece and the like caused by too large invasion amount of the battery monomer 20 are reduced.

In some embodiments, the cavity 122 includes a plurality of first energy absorbing cavities 1221 and a plurality of second energy absorbing cavities 1222, and the first energy absorbing cavities 1221 alternate with the second energy absorbing cavities 1222 in sequence.

Specifically, the battery 100 includes a plurality of battery cells 20, the first energy-absorbing cavity 1221 corresponds to a middle portion of the battery cells 20, and the second energy-absorbing cavity 1222 corresponds to an edge of the battery cells 20, so that the plurality of first energy-absorbing cavities 1221 and the plurality of second energy-absorbing cavities 1222 that are alternately arranged in sequence can correspond to the plurality of battery cells 20 to protect the plurality of battery cells 20. Alternatively, one second energy absorbing cavity 1222 may correspond to an edge of one battery cell 20, where two second energy absorbing cavities 1222 are disposed adjacent to each other and correspond to edges of two battery cells 20 respectively; alternatively, one second energy absorbing cavity 1222 corresponds to the edges of two adjacent battery cells 20 at the same time, and the center of the second energy absorbing cavity 1222 corresponds to the junction position of the two battery cells 20.

By adopting the above technical scheme, the protection plate 10 can protect a plurality of battery cells 20 at the same time.

In some embodiments, the plurality of ribs 121 includes a first rib 1211 and a second rib 1212, the first rib 1211 extending from the first wall 111 along a first oblique direction, the second rib 1212 extending from the first wall 111 along a second oblique direction, the first oblique direction being disposed at a right angle or an obtuse angle to the second oblique direction.

The angle between the first and second oblique directions may be a right angle or an obtuse angle, i.e. the angle is greater than or equal to 90 ° and less than 180 °.

Alternatively, when the included angle is an obtuse angle, the included angle may be 100 ° to 150 °, for example, 100 °, 110 °, 120 °, 125 °, 130 °, 140 °, 150 °, etc., but not limited thereto.

The first oblique direction is disposed at right angle or obtuse angle to the second oblique direction, so that the first oblique direction intersects with the second oblique direction. The inclination directions of the first rib 1211 and the second rib 1212 are different, and it is possible to prevent the ribs provided obliquely in a single direction from decreasing the deformation resistance of the plate body 11.

In some embodiments, the first oblique direction and the second oblique direction are symmetrically disposed with respect to the thickness direction of the plate body 11.

The thickness direction of the plate body 11, i.e., the direction perpendicular to the first wall 111 and the second wall 112. The first inclination direction and the second inclination direction are symmetrically disposed with respect to the thickness direction of the plate body 11 such that the inclination directions of the first ribs 1211 and the second ribs 1212 are opposite.

By adopting the technical scheme, the first ribs 1211 and the second ribs 1212 with opposite inclination directions are arranged in the plate body 11, so that the deformation resistance of the plate body 11 is good, and the strength is high.

Further, in some embodiments, the first ribs 1211 alternate with the second ribs 1212 in sequence.

Specifically, a first energy absorbing cavity 1221 is formed between the first rib 1211, the second rib 1212, the first wall 111 and the second wall 112, and a second energy absorbing cavity 1222 is formed between the first rib 1211, the second rib 1212 and the second wall 112. The first ribs 1211 and the second ribs 1212 are alternately arranged in sequence, so that the first energy absorption cavities 1221 and the second energy absorption cavities 1222 in the plate body 11 are also alternately arranged to protect the middle and edges of the battery cell 20, respectively.

In other embodiments, the first ribs 1211 may be arranged in a first group, and the second ribs 1212 may be arranged in a second group, where the first group and the second group are alternately arranged.

In other embodiments, the second energy absorbing cavity 1222 may be omitted, where the first energy absorbing cavity 1221 is capable of absorbing a portion of the external force, and the ribs forming the first energy absorbing cavity 1221 may decompose and transfer a portion of the force to the bottom surface of the battery cell 20.

Referring to fig. 4 and 5, a battery 100 including a protection plate 10 is provided in a second embodiment of the present application. In the second embodiment, the shielding plate 10 further includes a thermal management part 13. Referring to fig. 2 and fig. 4 to 5, the thermal management component 13 is disposed between the first wall 111 and the battery cell 20, and a flow channel 132 for circulating a heat exchange medium is disposed in the thermal management component 13, and an extending direction of the flow channel 132 is parallel to or intersects with an extending direction of the cavity 122.

The thermal management component 13 is used to regulate the temperature of the battery cells 20, including heating the battery cells 20 and cooling the battery cells 20. One or more flow channels 132 are provided in the thermal management component 13, where the flow channels 132 are configured to allow a heat exchange medium to flow therethrough, and the heat exchange medium may be a liquid or a gas, for example, but not limited thereto.

As shown in fig. 5, the cavity 122 in the plate 11 includes a first energy-absorbing cavity 1221 and a second energy-absorbing cavity 1222, and the extending directions of the first energy-absorbing cavity 1221 and the second energy-absorbing cavity 1222 are the same; the extending direction of the flow channel 132 is perpendicular to the extending direction of the cavity 122. Specifically, the flow channel 132 extends along the first direction X, the first energy absorbing cavity 1221 and the second energy absorbing cavity 1222 extend along the second direction Y, and the thickness direction of the plate 11 is the third direction Z.

Referring to fig. 7, in the third embodiment, the direction of the flow channels 132 in the thermal management component 13 may also be parallel to the extending direction of the cavities 122 to cope with the battery 100 with different water cooling arrangements.

The protection plate 10 of the embodiment of the present application integrates the thermal management part 13, saving the height space of the battery 100 and the weight of the water cooling structure; the extending direction of the flow channels 132 may be flexibly set according to the arrangement direction of the battery cells 20.

With continued reference to fig. 5 and 6, in some embodiments, a groove 1111 is formed in the first wall 111, and the thermal management component 13 is received in the groove 1111.

The recess 1111 is concavely disposed on a side of the first wall 111 facing away from the second wall 112, and the recess 1111 is used for accommodating the thermal management component 13, so as to further save a height space of the battery 100 and a space occupied by the thermal management component 13, thereby improving an effective volume utilization rate of the battery 100 and being beneficial to improving an energy density of the battery 100.

Further, the height of the thermal management component 13 is less than or equal to the depth of the groove 1111.

The height of the thermal management component 13 is the height of the thermal management component 13 along the thickness direction of the plate 11, the groove 1111 is a blind groove, and the height of the thermal management component 13 is less than or equal to the depth of the groove 1111, so that the thermal management component 13 can be completely contained in the groove 1111, and the thermal management component 13 is prevented from protruding out of the surface of the plate 11, so that the first wall 111 of the plate 11 can still be attached to the battery cell 20, and when the protection plate 10 is impacted by external force, the first wall 111 of the plate 11 is attached to the battery cell 20, thereby playing an effective role in protection.

In some embodiments, the grooves 1111 are filled with a gel, and the thermal management component 13 is adhered to the board 11 by the gel.

The glue may be a heat conductive glue, so that the heat of the thermal management component 13 can be transferred to the board 11, and the glue may be other glue. The thermal management member 13 is adhered to the board 11 by a glue so that the thermal management member 13 is fixed to the board 11. At the time of manufacturing, according to the depth of the groove 1111 and the height information of the thermal management component 13, a predetermined thickness of gel is coated in the groove 1111, and then the thermal management component 13 is fixed in the groove 1111 by the gel so that the thermal management component 13 is flush with the surface of the first wall 111, and thus the protection plate 10 can be stably attached to the battery cell 20. In another embodiment, the height of the thermal management component 13 is equal to the thickness of the groove 1111, and the glue may be coated on the sidewall of the groove 1111, so that the thermal management component 13 is flush with the surface of the first wall 111.

The material of the thermal management component 13 may be metal or plastic. The plastic material is, for example, polypropylene (PP) or Polycarbonate (PC), etc., which has good buffering capacity and low cost, and it is understood that other types of plastic materials are possible. In other embodiments, the thermal management component 13 and the plate 11 may also be manufactured by integral molding.

By filling the glue in the groove 1111, the thermal management component 13 and the board 11 can be fixedly connected by the glue, and the thermal management component 13 can be flush with the surface of the first wall 111 by controlling the thickness of the glue.

As shown in fig. 4 and 5, in some embodiments, the first wall 111 is provided with a plurality of parallel grooves arranged at intervals, the thermal management component 13 includes a plurality of heat exchange tubes 131, each heat exchange tube 131 is provided with a flow channel 132, and the heat exchange tubes 131 are disposed in the grooves 1111 in a one-to-one correspondence.

It is understood that the flow channels 132 of the plurality of heat exchange tubes 131 may be arranged in series or in parallel; each heat exchange tube 131 is received in a corresponding groove 1111, and the surface of the heat exchange tube 131 may be flush with the surface of the first wall 111.

By providing the plurality of grooves 1111 and the plurality of heat exchange tubes 131, integration of the thermal management part 13 with the plate body 11 can be achieved, saving the height space of the battery 100, and facilitating improvement of the energy density of the battery 100.

In other embodiments, only one groove 1111 may be provided on the first wall 111, and the thermal management component 13 may be a plate-like member having a size close to that of the plate 11 and be accommodated in the groove 1111.

The recess 1111 in the first wall 111 may be omitted. Referring to fig. 8 and 9, a fourth embodiment of the present application provides a battery 100, wherein one surface of a thermal management component 13 is adhered to a surface of a first wall 111 by a glue, and the other surface of the thermal management component 13 is adhered to a battery cell 20 by a glue.

Specifically, the surface of the first wall 111 is planar, and the length and width of the thermal management component 13 are equal to or close to the length and width of the plate body 11, respectively. The both sides of the thermal management member 13 are respectively adhered to the first wall 111 and the battery cell 20 by a paste, so that the thermal management member 13 can be fixed between the plate 11 and the battery cell 20. The direction of extension of the flow channels 132 within the thermal management component 13 may be parallel or perpendicular to the direction of extension of the cavity 122. In the embodiment shown in fig. 8 and 9, the direction of extension of the flow channel 132 is perpendicular to the direction of extension of the cavity 122. The glue between the thermal management component 13 and the battery cell 20 may be a heat-conducting glue, so as to transfer the heat of the battery cell 20 to the thermal management component 13, thereby improving the heat exchange effect.

Through adopting above-mentioned technical scheme, guard plate 10 not only can absorb energy, has still integrated thermal management part 13, and thermal management part 13 can adjust the temperature of battery monomer 20, also can play certain guard action to battery monomer 20 simultaneously. The two sides of the thermal management component 13 are fixed on the battery monomer 20 and the plate 11 through colloid, and the assembly mode is simple and convenient; the protection plate 10 is adhered to the battery monomer 20 through the colloid, so that the torsion and bending rigidity of the whole battery 100 are improved, the battery can adapt to more severe use conditions, and the product competitiveness can be improved through more severe vibration impact test.

In some embodiments, the surface of the thermal management component 13 facing away from the plate 11 is provided with vent grooves 133, the vent grooves 133 extending through opposite ends of the thermal management component 13 and configured to be disposed directly opposite the explosion-proof valves (not shown) of the battery cells 20.

The opposite ends of the thermal management member 13 are both ends of the thermal management member 13 in the length or width direction, and since the ventilation grooves 133 penetrate the opposite ends of the thermal management member 13, the ventilation grooves 133 are bar-shaped ventilation grooves communicating with the outside, facilitating ventilation. The explosion-proof valve is arranged at the bottom of the battery cell 20, namely at one side of the battery cell 20 close to the protection plate 10. The vent groove 133 is opposite to the explosion-proof valve of the battery unit 20, so that the explosion-proof valve can be communicated with the outside through the vent groove 133, the explosion-proof valve is convenient for pressure relief, when the single battery unit 20 fails, the explosion-proof valve is opened by flushing, and the sprayed combustible gas can be guided to the outside of the battery 100 through the vent groove 133, so that the interlocking failure is avoided, and the safety of the battery 100 is improved; in addition, the ventilation grooves 133 are directly formed on the surface of the heat management member 13, which saves space inside the battery 100 and effectively reduces the overall height of the battery 100.

The vent grooves 133 may be arranged in a variety of ways, including, but not limited to, a row of cells 20 for each vent groove 133. The single row of the battery cells 20 refers to a plurality of the battery cells 20 arranged in parallel in a single row. For example, as shown in fig. 9, the plurality of batteries 100 are arranged in a row in the first direction X, and the vent grooves 133 extend in the first direction X while being disposed opposite to the explosion-proof valves of the plurality of battery cells 20. In other embodiments, the ventilation slots 133 may also correspond to a row of battery cells 20.

By providing the vent groove 133 on the thermal management part 13, the explosion-proof valve can be conveniently communicated with the outside, the safety of the battery 100 is improved, and the space inside the battery 100 is saved.

With continued reference to fig. 9, in some embodiments, the extending direction of the flow channel 132 perpendicularly intersects the extending direction of the cavity 122.

By adopting the above technical scheme, the thermal management component 13 improves the bending rigidity of the protection plate 10 in the length direction, and further strengthens the strength of the plate body 11.

Referring to fig. 10 and 11, in the fifth embodiment, the extending direction of the flow channel 132 is parallel to the extending direction of the cavity 122.

Referring to fig. 12 to 14, in the sixth embodiment, the battery cell 20 includes a case 21 and an electrode assembly (not shown) disposed in the case 21, the case 21 includes a top wall 211 and a bottom wall 212 disposed opposite to each other, and two first side walls 213 and two second side walls 214 connected between the top wall 211 and the bottom wall 212, the two first side walls 213 are disposed opposite to each other along a first direction X and the two second side walls 214 are disposed opposite to each other along a second direction Y, the first direction intersects the second direction, and an area of the first side walls 213 is larger than an area of the second side walls 214; the first wall 111 of the protection plate 10 is disposed opposite to the bottom wall 212, and the extending direction of the cavity 122 is parallel to the second direction.

The housing 21 is a component for forming the internal environment of the battery cell 20, which can be used to house the cell assembly, electrolyte, and other components. The top wall may be integral with the remainder of the housing 21 or may be provided by a snap-fit over the remainder of the housing 21. The material of the housing 21 may be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not particularly limited in the embodiment of the present application. The cell assembly is the component of the cell 20 where the electrochemical reaction occurs. One or more battery cell assemblies may be contained within housing 21. The cell assembly is mainly formed by winding or stacking a positive electrode sheet and a negative electrode sheet, and a separator is generally arranged between the positive electrode sheet and the negative electrode sheet. The parts of the positive electrode plate and the negative electrode plate with active substances form the main body part of the battery cell assembly, and the parts of the positive electrode plate and the negative electrode plate without active substances form the electrode lugs respectively. The positive electrode tab and the negative electrode tab may be located at one end of the main body portion together or located at two ends of the main body portion respectively. During charge and discharge of the battery 100, the positive and negative electrode active materials react with the electrolyte, and the tab is connected to the electrode terminal to form a current loop.

The first wall 111 of the protection plate 10 is disposed opposite to the bottom wall 212, and when the second wall 112 is impacted by an external force, part of energy is absorbed by the cavity 122, and then part of the force is transferred to the first wall 111 by the ribs, so that the protection plate 10 can reduce the influence of the external force on the battery cells 20.

The cavity 122 includes a first energy absorbing cavity 1221 and a second energy absorbing cavity 1222, and the first energy absorbing cavity 1221 and the second energy absorbing cavity 1222 extend along the second direction Y, i.e. the extending direction of the cavity 122 is the same as the extending direction of the first side wall 213. The first energy-absorbing cavity 1221 corresponds to the middle part of the battery cell 20, and the first ribs 1211 and the second ribs 1212 forming the first energy-absorbing cavity 1221 are capable of transmitting force to the first sidewall 213 and the second sidewall 214 of the battery cell 20; the second energy absorbing cavity 1222 corresponds to a single edge of the battery 100.

By adopting the above technical scheme, the first wall 111 of the protection plate 10 and the bottom wall 212 are arranged opposite to each other, and the extending direction of the cavity 122 is parallel to the second direction, the cavity 122 plays a role in absorbing energy, and the protection plate 10 can solve the problems of weak rigidity and large bottom ball impact deformation of the bottom of the battery 100.

In some embodiments, the battery 100 includes a plurality of rows of battery cells 20, the plurality of battery cells 20 in each row of battery cells 20 being arranged along a first direction X, and the plurality of rows of battery cells 20 being arranged along a second direction Y; the cavity 122 extends to opposite ends of the plate body 11 in the second direction Y.

By adopting the above technical scheme, each cavity 122 can simultaneously correspond to a plurality of battery cells 20, and the through holes penetrate through the opposite ends of the plate 11, so that the manufacturing is convenient.

In some embodiments, the battery 100 further includes a bottom guard plate 30, and the guard plate 10 is disposed between the battery cell 20 and the bottom guard plate 30.

The size of the bottom guard plate 30 may be greater than or equal to the size of the guard plate 10, and the bottom guard plate 30 serves to protect the battery cells 20 and the guard plate 10, adding a protective barrier to the battery 100.

Referring to fig. 1 to 14, an embodiment of a battery 100 is provided, which includes a battery unit 20 and a protection plate 10, wherein the protection plate 10 includes a plate body 11 and a plurality of ribs disposed in the plate body 11, the plate body 11 includes a first wall 111 and a second wall 112 disposed opposite to each other, and the first wall 111 is disposed close to the battery unit 20 opposite to the second wall 112; the plurality of ribs includes a first rib 1211 and a second rib 1212, the first rib 1211 extends from the first wall 111 along a first oblique direction, and the second rib 1212 extends from the first wall 111 along a second oblique direction, the first oblique direction being disposed at a right angle or an obtuse angle to the second oblique direction. The first energy absorbing cavity 1221 is formed between two adjacent ribs, the first wall 111 and the second wall 112, and the two ribs are disposed corresponding to two sidewalls of the battery cell 20, respectively. The second energy absorbing cavity 1222 is formed between two adjacent ribs and the second wall 112.

In some embodiments, the protection plate 10 further includes a thermal management member 13, the thermal management member 13 is disposed between the first wall 111 and the battery cell 20, and a flow passage 132 for circulating a heat exchange medium is disposed in the thermal management member 13, and an extending direction of the flow passage 132 is parallel to or intersects an extending direction of the cavity 122.

The battery 100 provided by the embodiment of the application can solve the problems that the rigidity of the bottom of the battery 100 is weak, and the battery cell 20 is easy to deform due to impact.

The present application also proposes an electrical device comprising a battery 100 as in the first aspect. The battery 100 is used to provide electrical energy to an electrical device.

The powered device may be any of the devices or systems described above that employ battery 100.

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 scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application, and are intended to be included in the scope of the present application.

Claims

1. A battery, comprising:

at least one battery cell;

2. The battery of claim 1, wherein: the connection parts of the ribs and the first wall and the side walls of the battery cells are correspondingly arranged so as to transfer the force born on the protection plate to the edges of the battery cells.

3. The battery of claim 2, wherein: the cavity comprises a first energy absorption cavity, and the first energy absorption cavity is opposite to the middle part of the battery monomer.

4. A battery as claimed in claim 3, wherein: the first energy absorption cavity is formed between two adjacent ribs, the first wall and the second wall, and the two ribs are respectively and correspondingly arranged with the two side walls of the battery cell.

5. The battery of claim 4, wherein: the first energy absorbing cavity has a first end proximate the first wall and a second end proximate the second wall, the first end having a width greater than a width of the second end.

6. A battery as claimed in claim 3, wherein: the cavity further comprises a second energy absorption cavity arranged adjacent to the first energy absorption cavity, and the second energy absorption cavity is used for being arranged opposite to the edge of the battery cell.

7. The battery of claim 6, wherein: the second energy absorption cavity is formed between two adjacent ribs and the second wall.

8. The battery of claim 6, wherein: the cross section of the first energy absorption cavity is trapezoid, and the cross section of the second energy absorption cavity is triangular.

9. The battery of claim 6, wherein: the cavity comprises a plurality of first energy absorption cavities and a plurality of second energy absorption cavities, and the first energy absorption cavities and the second energy absorption cavities are alternately arranged in sequence.

10. The battery of claim 1, wherein: the ribs comprise first ribs and second ribs, the first ribs extend from the first wall along a first inclination direction, the second ribs extend from the first wall along a second inclination direction, and the first inclination direction and the second inclination direction are arranged at right angles or obtuse angles.

11. The battery of claim 10, wherein: the first inclination direction and the second inclination direction are symmetrically arranged relative to the thickness direction of the plate body.

12. The battery of claim 10, wherein: the first ribs and the second ribs are alternately arranged in sequence.

13. The battery of claim 1, wherein: the protection plate further comprises a thermal management component, the thermal management component is arranged between the first wall and the battery cell, a runner for circulating a heat exchange medium is arranged in the thermal management component, and the extending direction of the runner is parallel to or intersected with the extending direction of the cavity.

14. The battery of claim 13, wherein: the first wall is provided with a groove, and the thermal management component is accommodated in the groove.

15. The battery of claim 14, wherein: the height of the thermal management component is less than or equal to the depth of the groove.

16. The battery of claim 15, wherein: the grooves are filled with colloid, and the thermal management component is adhered to the plate body through the colloid.

17. The battery of claim 14, wherein: the first wall is provided with a plurality of grooves which are parallel and are arranged at intervals, the heat management component comprises a plurality of heat exchange pipes, the heat exchange pipes are internally provided with flow channels, and the heat exchange pipes are arranged in the grooves in a one-to-one correspondence manner.

18. The battery of claim 13, wherein: one side of the thermal management component is adhered to the surface of the first wall through a colloid, and the other side of the thermal management component is adhered to the battery cell through a colloid.

19. The battery of claim 18, wherein: the surface of the thermal management component, which is away from the plate body, is provided with a vent groove, and the vent groove penetrates through the two opposite ends of the thermal management component and is used for being opposite to the explosion-proof valve of the battery cell.

20. The battery of claim 13, wherein: the extending direction of the flow channel is perpendicularly intersected with the extending direction of the cavity.

21. The battery of any one of claims 1-20, wherein: the battery unit comprises a shell and an electrode assembly arranged in the shell, wherein the shell comprises a top wall, a bottom wall, two first side walls and two second side walls, the top wall and the bottom wall are oppositely arranged, the two first side walls and the two second side walls are connected between the top wall and the bottom wall, the two first side walls are oppositely arranged along a first direction, the two second side walls are oppositely arranged along a second direction, the first direction intersects with the second direction, and the area of the first side walls is larger than that of the second side walls;

The first wall of the protection plate and the bottom wall are arranged opposite to each other, and the extending direction of the cavity is parallel to the second direction.

22. The battery of claim 21, wherein: the battery comprises a plurality of rows of the battery cells, wherein a plurality of the battery cells in each row of the battery cells are arranged along the first direction, and the plurality of rows of the battery cells are arranged along the second direction;

the cavity extends to opposite ends of the plate body along the second direction.

23. The battery of claim 21, wherein: the battery also comprises a bottom guard plate, and the guard plate is arranged between the battery monomer and the bottom guard plate.

24. An electrical device comprising a battery as claimed in any one of claims 1 to 23.