CN219436000U - Battery and electricity utilization device - Google Patents

Abstract

The embodiment of the application discloses a battery and an electricity utilization device, wherein the battery comprises a battery monomer group, a sampling connecting piece and a bracket, the battery monomer group comprises a plurality of battery monomers arranged along a first direction, and the battery monomers are provided with pressure release mechanisms; the bracket is positioned at one side of the battery monomer group, provided with the pressure release mechanism, and is provided with a wiring groove and a flue, and the flue is used for guiding the emission of the battery monomer to be discharged out of the battery when the pressure release mechanism is actuated; at least a part of the sampling connecting piece is accommodated in the wiring groove. In the embodiment provided by the application, the bracket has the wiring function and the air guide function, so that the number of parts is simplified, and the energy density of the battery is improved.

Description

Battery and electricity utilization device

Technical Field

The application relates to the technical field of batteries, in particular to a battery and an electric device.

Background

The lithium battery has the characteristics of high safety, good circularity, no pollution, relatively low raw material cost and the like, and has been widely used on electric automobiles. With the increasing demands of the current market for lithium batteries and the continuous development of lithium battery technology, lithium battery designs are increasingly focusing on high specific energy designs. While increasing the energy density, the space in the battery is more and more compact, and how to increase the energy density of the battery becomes a difficult problem in battery manufacturing.

Disclosure of Invention

The application provides a battery and an electric device, wherein the battery and the electric device have high energy density.

In a first aspect, embodiments of the present application provide a battery including a battery cell stack, a bracket, and a sampling connector. The battery cell group comprises a plurality of battery cells arranged along a first direction, and the battery cells are provided with pressure relief mechanisms; the bracket is positioned at one side of the battery monomer group, provided with the pressure relief mechanism, and is provided with a wiring groove and a flue, and the flue is used for guiding the emission of the battery monomer to be discharged out of the battery when the pressure relief mechanism is actuated; at least a portion of the sampling connector is received in the wiring slot.

In the above technical scheme, the support includes wiring groove and flue, and the wiring groove is used for acceping sampling connecting piece, and the flue is used for discharging the emission that the battery monomer produced out the battery when pressure release mechanism actuates, and the support has integrated the function of air guide and wiring. The bracket with the air guide structure is utilized to arrange the sampling connecting piece, other parts are not required to be arranged for fixing the sampling connecting piece, the number of parts is simplified, the ratio of single batteries in unit volume is improved, the ratio of single batteries in unit mass is also improved, and the energy density of the batteries is improved.

In some embodiments, the flue is disposed on a side of the support facing the pressure relief mechanism, and the wiring slot is disposed on a side of the support facing away from the pressure relief mechanism.

In the above technical scheme, flue and wiring groove are located the opposite both sides of support, and the flue faces pressure release mechanism, and the wiring groove deviates from pressure release mechanism, like this, reduces the influence of the emission in the flue to sampling connecting piece.

In some embodiments, the flue and the wiring duct each extend in the first direction.

In the technical scheme, the extending direction of the flue and the wiring groove is the same as the arrangement direction of the battery monomers, so that the bracket and the battery monomer group can share a part of size in the first direction, the space occupation in the first direction is reduced, the size of the battery in the first direction is reduced, the occupation ratio of the battery monomers in unit volume is favorably improved, and the energy density of the battery is improved.

In some embodiments, the bottom wall of the wiring groove is provided with a partition extending in the first direction, the partition being for dividing the wiring groove into a first wiring groove and a second wiring groove.

In the above technical scheme, the partition part partitions the wiring groove. The advantage lies in that first wiring groove can be used for acceping the sampling connecting piece that is close to first wiring groove, and the second wiring groove can be used for acceping the sampling connecting piece that is close to the second wiring groove, does benefit to the arrangement of sampling connecting piece like this, can avoid the possibility of crossing mutual interference between the sampling connecting piece under the condition that sampling connecting piece is in a large number, reduces the hidden danger.

In some embodiments, a sidewall of the wiring groove is provided with a notch.

In the technical scheme, the sampling connecting piece can enter the wiring groove from the notch.

In some embodiments, the side wall of the wiring groove is provided with a buckle, and the battery further comprises a clamping piece, wherein the clamping piece spans the wiring groove and is connected with the buckle.

In the technical scheme, the wiring groove has insufficient constraint force on the material connecting piece, the sampling connecting piece can be separated from the accommodating groove, and the sampling connecting piece in the wiring groove can be restrained by being clamped across the wiring groove and being clamped on the side wall of the wiring groove.

In some embodiments, the battery further comprises a separator plate, the separator plate is arranged between the support and the battery cell group, the separator plate is provided with a first through hole, the first through hole is correspondingly arranged with the pressure release mechanism, and the first through hole is communicated with the flue.

In the above-described solution, when thermal runaway of the battery cell occurs, emissions of the battery cell, such as high-temperature gas, active and active particulate matter, rapidly impact the sampling connection member and other components. Therefore, in the scheme, the flue is communicated with the flue through the first through hole of the isolation plate, so that the discharged matter can flow into the flue through the first through hole and then be discharged out of the battery. The direct impact of the discharged matter on the isolating plate, sampling connecting piece and other parts is reduced, and the reliability of the battery is improved.

In some embodiments, the bracket is mounted to the spacer.

In the technical scheme, other components can be not additionally arranged to mount the bracket, so that the influence of the bracket mounting components on the energy density of the battery is reduced.

In some embodiments, a first seal is disposed between the spacer plate and the bracket.

In the above technical solution, the first sealing member acts as a seal between the partition plate and the bracket to reduce the possibility of emissions leaking from between the partition plate and the bracket.

In some embodiments, the first seal is a sealant.

In the technical scheme, the first sealing piece is sealant, so that the bracket and the isolation plate can be manufactured respectively to reduce the manufacturing difficulty, and then the bracket and the isolation plate are bonded into a whole through the sealant, so that the connecting mode is simple, and the production efficiency is high. In addition, compared with a mode of adopting sealing foam and sealing gaskets, the sealing gaskets have the advantages that when the flue is deformed, the compression of the sealing gaskets corresponding to the deformation positions is insufficient, the sealing performance of the isolation plate and the support is insufficient, and the possibility of leakage of emissions exists. According to the technical scheme, the isolation plate and the support are connected through the sealant, so that the connection stability is high, and the risk of leakage of the discharged matters can be further reduced

In some embodiments, the battery further comprises a second sealing member, the second sealing member is arranged between the isolation plate and the battery cell group, the second sealing member is provided with a second through hole, the second through hole is correspondingly arranged with the pressure release mechanism, and the second through hole is communicated with the flue.

In the technical scheme, the second sealing piece is used for sealing between the isolation plate and the battery cell group, so that the risk of leakage of emissions from the isolation plate to the battery cell group can be reduced.

In some embodiments, the battery further includes a plurality of heat dissipation members arranged along the first direction, and a receiving space for receiving the battery cell is formed between two adjacent heat dissipation members.

Among the above-mentioned technical scheme, can dispel the heat in the battery monomer use, if heat gathering temperature is too high can arouse thermal runaway and spread, utilizes the radiating member to enclose into accommodation space in order to hold the battery monomer, is wrapped by the radiating member around the battery monomer and can accelerate heat diffusion, promotes the heat dispersion of battery, and then improves the reliability of battery.

In some embodiments, at least one of the heat dissipation elements is provided with a first connection portion, and the bracket is provided with a second connection portion, and the first connection portion is connected with the second connection portion.

Among the above-mentioned technical scheme, because battery monomer sets up in the accommodation space that the radiating member encloses the synthesis, the battery monomer is relatively stable with the structure after the radiating member combination, consequently, utilizes the radiating member to provide the tie point for through the support, is connected support and radiating member and can improve the stability of support installation, and then promotes the stability of battery.

In some embodiments, the number of the heat dissipation elements provided with the first connection portion is plural.

In the above technical scheme, the bracket is deformed due to the impact of the emission to the flue. Providing a plurality of heat sinks with first connection portions may provide a plurality of connection points for the bracket, thereby reducing the likelihood of flue deformation.

In some embodiments, the heat sink is an air-cooled sheet provided with air-cooled channels extending in a second direction, the second direction being perpendicular to the first direction.

According to the technical scheme, the air cooling channels extending along the second direction on the air cooling sheets can accelerate heat diffusion, so that the heat dissipation performance of the battery is improved, the service life of the battery is prolonged, and the performance is improved.

In some embodiments, the battery further includes a pair of end plates disposed at intervals along the first direction, the battery cell stack is disposed between the pair of end plates, the end plates are provided with third connecting portions, and the bracket further includes fourth connecting portions, the third connecting portions and the fourth connecting portions being connected.

In the above technical scheme, the end plate is utilized to provide a connecting point for the bracket, and the two ends of the bracket along the first direction are fixed, so that the possibility of deformation of the bracket is further reduced, and the stability of the bracket is improved.

In a second aspect, an embodiment of the present application provides an electrical device, including a battery provided by the foregoing embodiment.

Drawings

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

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

fig. 2 is a schematic structural diagram of a battery provided in some embodiments of the present application;

fig. 3 is a schematic structural diagram of a battery cell according to some embodiments of the present disclosure;

fig. 4 is a schematic structural diagram of a battery provided in some embodiments of the present application;

FIGS. 5 and 6 are schematic views of different angles of a stent according to some embodiments of the present application;

FIG. 7 is an exploded view of a battery provided in some embodiments of the present application;

FIG. 8 is a schematic structural view of a separator provided in some embodiments of the present application;

FIG. 9 is a schematic view of a spacer and a bracket according to some embodiments of the present application;

fig. 10 is a schematic diagram illustrating an assembly structure of a heat dissipation element and a battery cell according to some embodiments of the present disclosure;

FIG. 11 is an exploded view of a battery provided in accordance with other embodiments of the present application;

FIG. 12 is a schematic structural diagram of a heat sink according to some embodiments of the present disclosure;

fig. 13 is an enlarged view of the area a shown in fig. 4.

Icon: 100-cell; 10-a box body; 11-a first part; 12-a second part; 21-a battery cell stack; 211-battery cells; 2111-end cap; 21111—a pressure relief mechanism; 2112-electrode assembly; 2113-housing; 22-a bracket; 221-flue; 222-wiring grooves; 2221-separator; 2222-bottom wall; 2223-sidewalls; 22231-notch; 22232-catch; 222 a-a first wiring groove; 222 b-a second wiring groove; 2224-second connection; 2225-fourth connection; 23-sampling connection; 24-clamping piece; 25-separating plates; 251-first through holes; 252-mounting slots; 253-fourth through holes; 254-fifth connection; 26-a confluence part; 27-a first seal; 28-a second seal; 281-second through holes; 29-a heat sink; 291-first connection portion; 2911-steps; 29 a-a first heat sink; 29 b-a second heat sink; 29 c-a third heat sink; 29 d-fourth heat sink; 29 e-a fifth heat sink; 292-air cooling channel; 293-accommodation space; 30-end plates; 301-a third connection; 302-sixth connection; 31-side plates; 32-cover plate; 1000-vehicle; 200-motor; 300-a controller; x-a first direction; y-a second direction; z-third direction.

Detailed Description

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

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

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

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.

In the description of the present application, it is to be noted that, unless otherwise indicated, the meaning of "plurality" is two or more; the terms "upper," "lower," "left," "right," "inner," "outer," and the like indicate an orientation or positional relationship merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The "vertical" is not strictly vertical but is within the allowable error range. "parallel" is not strictly parallel but is within the tolerance of the error.

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.

In the embodiments of the present application, the same reference numerals denote the same components, and in the interest of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, etc. dimensions of the various components in the embodiments of the present application, as well as the overall thickness, length, width, etc. dimensions of the integrated device, are illustrative only and should not be construed as limiting the present application in any way.

The term "plurality" as used herein refers to more than two (including two).

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

Reference to a battery in embodiments of the present application refers to a single physical module that includes multiple battery cells to provide higher voltages and capacities. The battery generally includes a case for enclosing one or more battery cells. The case body can prevent liquid or other foreign matters from affecting the charge or discharge of the battery cells.

In some battery manufacturing technologies, a plurality of battery cells (cells) may be integrated into a battery module (also called a battery module), and then the battery module is mounted in a case of a battery to form a battery pack (also called a battery for short). In other manufacturing technologies, a plurality of battery cells may be directly mounted in a case to form a battery pack, so that an intermediate state of a battery module is removed to reduce the weight of the battery pack and increase the energy density of the battery, and thus the technology is also called a cell to pack (cell to pack) packaging technology.

The pressure release mechanism on the battery monomer has an important influence on the safety of the battery. For example, when a short circuit, overcharge, or the like occurs, thermal runaway may occur inside the battery cell, and thus pressure or temperature rises. In this case, the pressure release mechanism is actuated to release the internal pressure and temperature outwards, so as to prevent explosion and fire of the battery cells.

A pressure relief mechanism refers to an element or component that actuates to relieve the internal pressure or temperature of a battery cell 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.

As used herein, "actuation" refers to the actuation or activation of a pressure relief mechanism to a state such that the internal pressure and temperature of the battery cells are relieved. The actions generated by the pressure relief mechanism may include, but are not limited to: at least a portion of the pressure relief mechanism breaks, tears or opens, etc. When the pressure release mechanism is actuated, high-temperature and high-pressure substances inside the battery cell are discharged outwards from the actuated position as emissions. In this way, the pressure and temperature of the battery cell can be relieved under the condition of controllable pressure or temperature, so that the occurrence of a potential serious accident is avoided.

References herein to emissions from a battery cell include, but are not limited to: high temperature and high pressure gas, flame, smoke, etc. generated from the battery cells.

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

For a general battery, the battery comprises a sampling connecting piece with functions of voltage sampling, temperature sampling and the like and an air guide structure, wherein the battery unit is provided with a pressure relief mechanism, and the air guide structure is used as the air guide mechanism of the battery for discharging emissions generated by the battery unit out of the battery when the pressure relief mechanism is actuated. The sampling connecting piece can influence the inner space of battery, and the air guide structure itself can occupy certain space, influences the volume and the quality of battery, influences the energy density of battery.

In view of this, the present embodiments provide a battery comprising a rack provided with a chimney and a wiring slot for receiving a sampling connection, the chimney being for venting emissions generated by a battery cell out of the battery upon actuation of a pressure relief mechanism. The support integrates the functions of air guide and wiring, the support with an air guide structure is used for arranging the sampling connecting pieces, other parts are not required to be arranged for fixing the sampling connecting pieces, the number of the parts is simplified, the occupation ratio of the single batteries in unit volume is improved, the occupation ratio of the single batteries in unit mass is also improved, and the energy density of the batteries is improved.

The technical scheme described in the embodiment of the application is applicable to batteries and power utilization devices using the batteries.

The electric device may be a vehicle, a portable device, a ship, a spacecraft, an electric toy, an electric tool, or the like. The vehicle can be a fuel oil vehicle, a fuel gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle or a range-extended vehicle; spacecraft including airplanes, rockets, space planes, spacecraft, and the like; the electric toy includes fixed or mobile electric toys, such as a game machine, an electric car toy, an electric ship toy, and an electric airplane toy; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railroad power tools, such as electric drills, power grinders, electric hammers, impact drills, concrete vibrators, electric planers, and the like. The embodiment of the application does not limit the electric device in particular.

For convenience of explanation, the following examples will be described taking an electric device as an example of a vehicle.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a vehicle 1000 according to some embodiments of the present application, a battery 100 is disposed in the vehicle 1000, and the battery 100 may be disposed at a bottom or a head or a 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 300 and a motor 200, the controller 300 being configured to control the battery 100 to power the motor 200, 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.

In some embodiments, referring to fig. 2, fig. 2 is a schematic structural diagram of a battery 100 according to some embodiments of the present application, and the battery 100 includes a plurality of battery cells 211. The plurality of battery cells 211 may be connected in series or parallel or series-parallel. The series-parallel connection refers to that the plurality of battery cells 211 are connected in series or in parallel.

In some embodiments, the battery 100 may further include a bus bar member 26, and the plurality of battery cells 211 may be electrically connected through the bus bar member 26, so as to implement serial connection, parallel connection, or series-parallel connection of the plurality of battery cells 211.

The bus bar member 26 may be a metal conductor such as copper, iron, aluminum, steel, aluminum alloy, or the like.

In some embodiments, the battery 100 may further include a case 10, the case 10 for accommodating the battery cells 211. The case 10 may include a first portion 11 and a second portion 12, the first portion 11 and the second portion 12 being overlapped with each other to define a space for accommodating the battery cell 211. Of course, the connection between the first portion 11 and the second portion 12 may be sealed by a sealing element (not shown), which may be a sealing ring, a sealant, or the like.

The first portion 11 and the second portion 12 may have various shapes, such as a rectangular parallelepiped, a cylinder, and the like. The first portion 11 may be a hollow structure with one side opened, and the second portion 12 may be a hollow structure with one side opened, and the open side of the second portion 12 is closed to the open side of the first portion 11, so that the case 10 having the accommodation space 293 is formed. Of course, the first portion 11 may be a hollow structure with one side open, the second portion 12 may be a plate-like structure, and the second portion 12 may be covered on the open side of the first portion 11 to form the case 10 for accommodating the battery cell 211.

Referring to fig. 3, fig. 3 is an exploded view of a battery cell 211 provided in some embodiments of the present application, the battery cell 211 may include a housing 2113, an electrode assembly 2112, an end cap 2111, and other functional components.

The case 2113 is a member for accommodating the electrode assembly 2112, and the end cap 2111 is a member that is capped at an opening of the case 2113 to isolate the internal environment of the battery cell 211 from the external environment. End cap 2111 fits over an opening in housing 2113, and end cap 2111 and housing 2113 together define a sealed space for housing electrode assembly 2112, electrolyte and other functional components. The end cap 2111 is provided with a pressure relief mechanism 21111, and the pressure relief mechanism 21111 vents the effluent of the cell 211 out of the cell 211 when the cell 211 is thermally out of control.

Referring to fig. 4, 5 and 6, fig. 4 is a schematic structural view of a battery 100 according to some embodiments of the present application; fig. 5 and 6 are schematic views of different angles of the bracket 22 according to some embodiments of the present application.

The embodiment of the application provides a battery 100, the battery 100 includes a battery unit group 21, a sampling connecting piece 23 and a bracket 22, the battery unit group 21 includes a plurality of battery units 211 arranged along a first direction X, and the battery units 211 are provided with a pressure release mechanism 21111; the bracket 22 is positioned at one side of the battery cell group 21 where the pressure release mechanism 21111 is provided, the bracket 22 is provided with a wiring groove 222 and a flue 221, and the flue 221 is used for guiding the discharge of the battery cell 211 out of the battery 100 when the pressure release mechanism 21111 is actuated; at least a part of the sampling connector 23 is accommodated in the wiring groove 222.

The shape of the battery cell 211 includes, but is not limited to, a rectangular parallelepiped, a cylinder. As illustrated in fig. 4, the battery cell 211 has a rectangular parallelepiped shape, and the first direction X is a thickness direction of the battery cell 211 along which a plurality of battery cells 211 are arranged.

The pressure release mechanism 21111 may take the form of, for example, an explosion-proof valve, an explosion-proof sheet, 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 211 reaches a predetermined threshold, the pressure release mechanism 21111 performs an action or a weak structure provided in the pressure release mechanism 21111 is broken, thereby forming an opening or passage through which the internal pressure, temperature, or other substances can be released.

The flue 221 belongs to the gas guide structure of the battery 100, and the discharged emissions guided by the flue 221 include high-temperature and high-pressure gas, flame, smoke, and the like. As can be appreciated, the flue 221 may be used to direct at least a portion of the effluent of the battery cells 211 out of the battery 100.

The sampling connection member 23 may be an electrical connection member for realizing voltage adoption or temperature sampling of the battery cell 211, such as a wire harness, a flexible circuit board (Flexible Printed Circuit, FPC), a flexible flat cable member (Flexible Flat Cable, FFC), or the like.

The wiring slots 222 may be used to receive part or all of the sampling connector 23.

In the present embodiment, the stand 22 includes a wiring groove 222 and a flue 221, the wiring groove 222 is used for accommodating the sampling connector 23, the flue 221 is used for discharging the discharge generated by the battery cell 211 out of the battery 100 when the pressure release mechanism 21111 is actuated, and the stand 22 integrates the functions of air guiding and wiring. The sampling connecting piece 23 is arranged by utilizing the bracket 22 with the air guide structure, other parts are not required to be arranged for fixing the sampling connecting piece 23, the number of parts is simplified, the ratio of the single battery 211 in unit volume is improved, the ratio of the single battery 211 in unit mass is also improved, and the energy density of the battery 100 is improved.

In some embodiments, the flue 221 is disposed on a side of the support 22 facing the pressure relief mechanism 21111, and the wiring slot 222 is disposed on a side of the support 22 facing away from the pressure relief mechanism 21111. It will be appreciated that the flue 221 and the wiring duct 222 are located on opposite sides of the support 22, the flue 221 facing the pressure relief mechanism 21111 and the wiring duct 222 facing away from the pressure relief mechanism 21111, thus reducing the effect of emissions in the flue 221 on the sampling connection 23.

As shown in fig. 4, the pressure release mechanism 21111 is provided on top of the battery cell 211, and the bracket 22 is provided above the battery cell group 21. The chimney 221 faces the battery cell stack 21, and the chimney 221 is not visible in the angle shown in fig. 4.

In some embodiments, both the flue 221 and the wiring duct 222 extend along the first direction X.

As can be appreciated, the extending direction of the flue 221 and the wiring groove 222 is the same as the arrangement direction of the battery cells 211, so that the bracket 22 and the battery cell group 21 can share a part of the dimension in the first direction X, which reduces the space occupation in the first direction X, reduces the dimension of the battery 100 in the first direction X, and is beneficial to improving the duty ratio of the battery cells 211 in unit volume and improving the energy density of the battery 100.

In addition, the flue 221 extends along the first direction X, which facilitates the extraction of the effluent from one side of the battery 100 along the first direction X, avoiding the effluent from affecting the other side arrangement structure of the battery 100.

Further, the support 22 is a strip-like structure extending along the first direction X.

Referring to fig. 5, in some embodiments, a bottom wall 2222 of the wiring groove 222 is provided with a partition 2221, the partition 2221 extending in the first direction X, the partition 2221 being used to divide the wiring groove 222 into a first wiring groove 222a and a second wiring groove 222b. Understandably, the partition 2221 partitions the wiring groove 222. The advantage is that the first wiring groove 222a can be used for accommodating the sampling connecting pieces 23 close to the first wiring groove 222a, and the second wiring groove 222b can be used for accommodating the sampling connecting pieces 23 close to the second wiring groove 222b, so that arrangement of the sampling connecting pieces 23 is facilitated, the possibility of cross interference among the sampling connecting pieces 23 under the condition that the number of the sampling connecting pieces 23 is large can be avoided, and hidden danger is reduced.

With continued reference to fig. 5, in some embodiments, a sidewall 2223 of the wiring slot 222 is provided with a notch 22231. The notch 22231 penetrates through the side wall 2223 of the wiring groove 222, and the sampling connector 23 can enter the wiring groove 222 from the notch 22231. The shape of the notch 22231 includes, but is not limited to, circular, rectangular, etc. Illustratively, in fig. 5, notch 22231 is U-shaped. Of course, in other embodiments, the notch 22231 may be V-shaped, W-shaped, etc.

In some embodiments, referring to fig. 4 and 5, a sidewall 2223 of the wiring slot is provided with a catch 22232, and the battery 100 further includes a clip 24, the clip 24 straddling the wiring slot 222 and being connected with the catch 22232.

Illustratively, the wiring groove 222 has two opposite side walls 2223, and two ends of the clamping member 24 may be respectively clamped to the two side walls 2223.

The wiring groove 222 has insufficient restraining force on the material connecting piece, the sampling connecting piece 23 can be separated from the accommodating groove, and the sampling connecting piece 23 in the wiring groove 222 can be restrained by clamping the clamping piece 24 to cross the wiring groove 222 and clamping the side wall 2223 of the wiring groove 222.

Referring to fig. 7, 8, and 9, fig. 7 is an exploded view of a battery 100 provided in some embodiments of the present application; fig. 8 is a schematic structural view of a separator 25 according to some embodiments of the present disclosure; fig. 9 is a schematic structural view of a spacer 25 and a bracket 22 according to some embodiments of the present application.

In some embodiments, the battery 100 further includes a separator 25, the separator 25 is disposed between the bracket 22 and the battery cell group 21, the separator 25 is provided with a first through hole 251, the first through hole 251 is disposed corresponding to the pressure release mechanism 21111, and the first through hole 251 is in communication with the flue 221.

The partition plate 25 is used to separate the sampling connector 23 region and the bus bar member 26 from the underlying battery cell stack 21, and the partition plate 25 is a member that plays a protective role. Illustratively, as shown in fig. 7, the sampling connection member 23 and the bus bar member 26 are relatively disposed above the partition plate 25, and the partition plate 25 partitions the sampling connection member 23 from the lower battery cell group 21.

The first through hole 251 being provided corresponding to the pressure release mechanism 21111 means that the first through hole 251 communicates with the pressure release mechanism 21111 such that the exhaust upon actuation of the pressure release mechanism 21111 enters the flue 221 via the first through hole 251. One first through hole 251 may correspond to the pressure release mechanism 21111 of the plurality of battery cells 211, at which time the effluent of the plurality of battery cells 211 enters the flue 221 through one first through hole 251. The number of the first through holes 251 may be plural, for example, one first through hole 251 for every three pressure release mechanisms 21111, or one first through hole 251 for every six pressure release mechanisms 21111. Of course, as shown in fig. 7, the first through holes 251 may correspond to the pressure release mechanisms 21111 of the battery cells 211 one by one.

When thermal runaway of the battery cell 211 occurs, emissions of the battery cell 211, such as high temperature gases, active and reactive particulate matter, may rapidly impact the sampling connection 23 and other components. In the present embodiment, the stack 221 communicates with the stack 221 through the first through-hole 251 of the partition plate 25, so that the exhaust may flow into the stack 221 through the first through-hole 251 to be discharged out of the battery 100. Direct impact of the discharged matter on the separator 25 or the sampling connector 23 and the like is reduced, and the reliability of the battery 100 is improved.

In some embodiments, the clamping member 24 spans the wiring groove 222, one end of the clamping member 24 is hinged to the isolation plate 25, and the other end is clamped to a buckle 22232 provided on a side wall 2223 of the wiring groove 222. The clamping piece 24 is hinged to the isolation plate 25, so that the clamping piece 24 can be prevented from falling off.

In some embodiments, referring to fig. 8, the bracket 22 is mounted to the spacer 25. In this way, the bracket 22 can be mounted without providing any additional components, and the influence of the mounting components of the bracket 22 on the energy density of the battery 100 can be reduced.

The partition plate 25 may be provided with a mounting groove 252, and the bracket 22 is mounted in the mounting groove 252.

In some embodiments, a first seal 27 is provided between the spacer 25 and the bracket 22. The first seal 27 acts as a seal between the partition 25 and the support 22 to reduce the risk of emissions leaking between the partition 25 and the support 22.

The first seal 27 may be a sealant, a foam seal, a gasket, or the like. Optionally, the spacer 25 and the bracket 22 are connected by a sealant. Therefore, the bracket 22 and the isolation plate 25 can be manufactured respectively, the manufacturing difficulty is reduced, then the bracket and the isolation plate are bonded into a whole, the connection mode is simple, and the production efficiency is high.

Further, since the gasket has a compression amount, when the compression amount of the gasket is insufficient, there is a possibility that the discharge between the partition plate 25 and the bracket 22 leaks. Compared with the mode of adopting the sealing foam and the sealing gasket, the sealing glue is used for connecting the isolation plate 25 and the support 22, so that the connection stability is high, and the risk of leakage of the discharged materials can be further reduced.

In some embodiments, referring to fig. 7, the battery 100 further includes a second sealing member 28, the second sealing member 28 is disposed between the separator 25 and the battery cell group 21, the second sealing member 28 is provided with a second through hole 281, the second through hole 281 is disposed corresponding to the pressure release mechanism 21111, and the second through hole 281 communicates with the flue 221.

The second seal 28 plays a role in sealing between the separator 25 and the battery cell group 21. The first through hole 251 communicates with the flue 221.

The arrangement of the second through hole 281 corresponding to the pressure release mechanism 21111 means that the first through hole 251 communicates with the second through hole 281 such that the exhaust upon actuation of the pressure release mechanism 21111 flows into the first through hole 251 and into the flue 221 via the second through hole 281. One second through hole 281 may correspond to the pressure release mechanism 21111 of the plurality of battery cells 211, at which time the effluent of the plurality of battery cells 211 enters the first through hole 251 through one second through hole 281 and enters the flue 221. The number of the second through holes 281 may be plural, for example, one second through hole 281 for every three pressure release mechanisms 21111, or one second through hole 281 for every six pressure release mechanisms 21111. Illustratively, fig. 7 shows a case where the second through holes 281 are in one-to-one correspondence with the pressure release mechanisms 21111.

In the present embodiment, the second sealing member 28 is used to perform a sealing function between the separator 25 and the battery cell stack 21, so that the risk of leakage of the exhaust from between the separator 25 and the battery cell stack 21 can be reduced.

Optionally, the second gasket is a sealing foam or gasket.

Optionally, in some embodiments, the first through holes 251 are disposed in one-to-one correspondence with the second through holes 281. In this way, the first through holes 251, the second through holes 281 and the flue 221 are communicated, the discharge path is increased, and the discharge can be discharged from the nearest second through holes 281 to the flue 221, thereby accelerating the discharge from the battery 100.

Referring to fig. 10, fig. 10 is a schematic diagram illustrating an assembly structure of a heat sink 29 and a battery cell 211 according to some embodiments of the present application. In some embodiments, the battery 100 further includes a plurality of heat dissipation members 29 arranged in the first direction X, and a receiving space 293 for receiving the battery cell 211 is formed between two adjacent heat dissipation members 29.

The accommodation space 293 is used to accommodate the battery cell 211, and the accommodation space 293 may be used to accommodate part or all of the battery cell 211.

The battery cell 211 can dissipate heat in the use process, if the heat accumulation temperature is too high, thermal runaway can be caused to spread, the heat dissipation piece 29 is utilized to enclose the synthetic accommodation space 293 to accommodate the battery cell 211, and the heat dissipation can be accelerated by the cladding of the heat dissipation piece 29 around the battery cell 211, so that the heat dissipation performance of the battery 100 is improved.

Referring to fig. 11 and 12, in conjunction with fig. 4, fig. 11 is an exploded view of a battery 100 provided in accordance with further embodiments of the present application; fig. 12 is a schematic structural diagram of a heat dissipating member 29 according to some embodiments of the present application. In some embodiments, at least one heat sink 29 is provided with a first connection portion 291, the bracket 22 is provided with a second connection portion 2224, and the first connection portion 291 is connected with the second connection portion 2224.

The first connection portion 291 and the second connection portion 2224 may be connected by a screw. Illustratively, the first connection portion 291 is provided with a threaded hole, the second connection portion is a through hole, the locking member is a screw, and the locking member is inserted into the through hole to be screwed with the first connection portion 291 to connect the bracket 22 with the heat sink 29.

Because the battery cell 211 is disposed in the accommodating space 293 surrounded by the heat dissipation element 29, the structure of the battery cell 211 and the heat dissipation element 29 after being combined is relatively stable, and therefore, the heat dissipation element 29 is utilized to provide a connection point for the support 22, and the support 22 is connected with the heat dissipation element 29, so that the stability of the support 22 can be improved, and the stability of the battery 100 can be further improved.

Alternatively, in some embodiments, referring to fig. 8, the partition plate 25 is further provided with a fourth through hole 253, so that the first connection portion 291 may be connected with the first connection portion 291 through the partition plate 25 from the fourth through hole 253.

In some embodiments, the number of heat dissipation elements 29 provided with the first connection portion 291 is plural.

For example, two, three, four, five, etc. Illustratively, as shown in fig. 1, the number of heat dissipation elements 29 provided with the first connection portion 291 is five. The first heat sink 29a, the second heat sink 29b, the third heat sink 29c, the fourth heat sink 29d, and the fifth heat sink 29e, respectively. The first heat dissipation element 29a, the second heat dissipation element 29b, the third heat dissipation element 29c, the fourth heat dissipation element 29d, and the fifth heat dissipation element 29e are arranged at intervals along the first direction X.

The heat sink 29 may have the same or different structures. As illustrated by way of example in fig. 1. The third heat sink 29c is located at the middle of the battery 100, and the stability of the third heat sink 29c is required to be higher, so that it may be designed in a structure with higher stability, for example, by adding a thickness to the third heat sink 29c or adding a connection part to improve the stability of the battery 100.

The support 22 is deformed due to the impact of the emissions to the flue 221. Providing a plurality of heat sinks 29 with first connection 291 may provide a plurality of connection points for the bracket 22, thereby reducing the likelihood of deformation of the flue 221.

In some embodiments, referring to fig. 12, the heat sink 29 is an air-cooled sheet provided with air-cooled channels 292 extending in a second direction Y, which is perpendicular to the first direction X.

The air-cooling passages 292 may be provided in plurality, and the plurality of air-cooling passages 292 are arranged along the third direction Z. The first direction X, the second direction Y and the third direction Z are perpendicular to each other. Illustratively, as shown in fig. 12, the air-cooling passages 292 are two.

The air cooling channels 292 extending along the second direction Y on the air cooling plate can accelerate the heat diffusion, so as to improve the heat dissipation performance of the battery 100, thereby prolonging the service life of the battery 100 and improving the performance.

In some embodiments, referring to fig. 1, the battery 100 further includes a pair of end plates 30, the pair of end plates 30 being spaced apart along the first direction X, the battery cell stack 21 being disposed between the pair of end plates 30, the end plates 30 being provided with third connecting portions 301, the holder 22 further; including a fourth connection portion 2225, and the third connection portion 301 and the fourth connection portion 2225 are connected.

The third connection part 301 and the fourth connection part 2225 may be connected by a screw. Illustratively, the third connection part 301 is provided with a through hole, the fourth connection part 2225 is provided with a threaded hole, and a screw is threaded through the through hole to be connected with the third connection part 301.

In this embodiment, the end plates 30 are used to provide connection points for the support 22, so as to fix the two ends of the support 22 along the first direction X, further reduce the possibility of deformation of the support 22, and improve the stability of the support 22.

Further, the partition plate 25 is provided with a fifth connecting portion 254, the end plate 30 is provided with a sixth connecting portion 302, and the fifth connecting portion 254 is connected to the sixth connecting portion 302.

In some embodiments, referring to fig. 12 and 13, fig. 13 is an enlarged view of the a region shown in fig. 4. The first connection portion 291 is provided with a step 2911, and the battery 100 further includes a bus member 26, the bus member 26 being disposed on a side of the partition plate 25 facing away from the battery cell group 21.

In the above embodiment, since the battery cells 211 are connected in series or in parallel by the bus member 26, the bus member 26 is charged, and since the heat sink 29 is close to the battery cell group 21, there is a possibility that the heat sink 29 is charged, and if the first connection portion 291 is charged, there is a risk of a short circuit communicating with the bus member 26. Therefore, providing the step 2911 may increase the creepage distance between the first connection portion 291 and the bus member 26, reducing the potential risk.

The sampling connector 23, the bus bar 26 and the isolation plate 25 are generally integrated, which is also called a harness isolation assembly. As shown in fig. 7 and 11, the sampling connector 23, the confluence part 26, and the partition plate 25 are integrated, and the sampling connector 23 and the confluence part 26 are disposed above the partition plate 25. Fig. 8 is a schematic structural view of the isolation plate 25 after the harness isolation assembly conceals the related structures such as the sampling connector 23, the bus bar member 26, the mounting structure of the sampling connector 23, the mounting structure of the bus bar member 26, and the like.

In some embodiments, referring to fig. 11, the battery 100 further includes a pair of side plates 31 and a cover plate 32, the pair of side plates 31 being spaced apart along the second direction Y. The battery cell group 21 is disposed between a pair of side plates 31. The cover plate 32 is provided on the side of the battery cell group 21 where the pressure release mechanism 21111 is provided.

The embodiment also provides a battery 100, the battery 100 including a battery cell group 21, a bracket 22, a separator 25, a second sealing member 28, a sampling connecting member 23, a plurality of heat dissipation members 29, and a pair of end plates 30. The pair of baffles are spaced apart along the first direction X. The battery cell group 21 includes a plurality of battery cells 211 arranged along the first direction X, and the battery cell group 21 is disposed between a pair of baffles. The battery cell 211 is provided with a pressure release mechanism 21111. The support 22 is arranged on one side of the battery unit group 21, which is provided with the pressure release mechanism 21111, the isolation plate 25 is arranged between the support 22 and the battery unit group 21, the support 22 is arranged on the isolation plate 25 through sealant, and the second sealing piece 28 is arranged between the battery unit group 21 and the isolation plate 25. The holder 22 includes a wiring groove 222 for receiving at least part of the sampling connector 23, and a flue 221 for guiding the discharge of the battery cell 211 out of the battery 100. The sealing member is provided with a second through hole 281, the partition plate 25 is provided with a first through hole 251, the second through hole 281 corresponds to the pressure release mechanism 21111, the first through hole 251 corresponds to the second through hole 281, and the first through hole 251, the second through hole 281 and the flue 221 are communicated. The plurality of heat dissipation members 29 are arranged in the first direction X, and two adjacent heat dissipation members 29 form a receiving space 293 receiving the battery cell 211. The heat sink 29 is provided with a first connection portion 291, and the bracket 22 is provided with a second connection portion 2224, and the first connection portion 291 is connected to the second connection portion 2224. The end plate 30 is provided with a third connection portion 301, the bracket 22 is provided with a fourth connection portion 2225, and the third connection portion 301 is connected to the fourth connection portion 2225.

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other.

The above embodiments are only for illustrating the technical solution of the present application, and are not intended to limit the present application, and various modifications and changes may be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims (17)

1. A battery, comprising:

the battery cell group comprises a plurality of battery cells arranged along a first direction, and the battery cells are provided with pressure relief mechanisms;

the bracket is positioned at one side of the pressure release mechanism of the battery unit group, is provided with a wiring groove and a flue, and the flue is used for guiding the discharge of the battery unit to be discharged out of the battery when the pressure release mechanism is actuated;

and at least one part of the sampling connecting piece is accommodated in the wiring groove.

2. The battery of claim 1, wherein the flue is disposed on a side of the bracket facing the pressure relief mechanism, and the wiring slot is disposed on a side of the bracket facing away from the pressure relief mechanism.

3. The battery of claim 1, wherein the chimney and the wiring slot each extend in the first direction.

4. The battery according to claim 1, wherein a bottom wall of the wiring groove is provided with a partition portion extending in the first direction, the partition portion being for dividing the wiring groove into a first wiring groove and a second wiring groove.

5. The battery of claim 1, wherein the sidewall of the wiring groove is provided with a notch.

6. The battery of claim 1, wherein the sidewall of the wiring slot is provided with a clip, the battery further comprising a clip that spans the wiring slot and connects with the clip.

7. The battery of any one of claims 1-6, further comprising a separator plate disposed between the support and the battery cell stack, the separator plate having a first through hole disposed therein, the first through hole being disposed in correspondence with the pressure relief mechanism, the first through hole being in communication with the flue.

8. The battery of claim 7, wherein the bracket is mounted to the separator.

9. The battery of claim 7, wherein a first seal is disposed between the separator and the bracket.

10. The battery of claim 9, wherein the first seal is a sealant.

11. The battery of claim 7, further comprising a second seal disposed between the separator and the battery cell stack, the second seal being provided with a second through-hole disposed in correspondence with the pressure relief mechanism, the second through-hole communicating with the flue.

12. The battery according to claim 1, further comprising a plurality of heat dissipation members arranged in the first direction, wherein an accommodating space for accommodating the battery cell is formed between two adjacent heat dissipation members.

13. The battery of claim 12, wherein at least one of the heat sinks is provided with a first connection portion and the bracket is provided with a second connection portion, the first connection portion being connected to the second connection portion.

14. The battery according to claim 13, wherein the number of the heat dissipation elements provided with the first connection portion is plural.

15. The battery of any one of claims 12-14, wherein the heat sink is an air-cooled sheet provided with air-cooled channels extending in a second direction, the second direction being perpendicular to the first direction.

16. The battery of claim 1, further comprising a pair of end plates disposed at intervals along the first direction, the battery cell stack being disposed between the pair of end plates, the end plates being provided with a third connecting portion, the bracket further comprising a fourth connecting portion, the third connecting portion and the fourth connecting portion being connected.

17. An electrical device comprising a battery as claimed in any one of claims 1 to 16.