CN220984614U - Battery and electricity utilization device - Google Patents

Abstract

The application relates to the technical field of batteries, and provides a battery and an electric device. Wherein, the battery includes: the box body frame is internally provided with a heat exchange flow channel, the heat exchange flow channel is used for flowing a heat exchange medium, the box body frame is limited with a plurality of containing cavities for containing electrolyte, and the containing cavities are provided with openings; a plurality of electrode assemblies, at least one electrode assembly being disposed in each receiving chamber; and the end covers are correspondingly covered on the openings of the accommodating cavities and are provided with electrode terminals which are electrically connected with the electrode assemblies. By the technical scheme, the space utilization rate of the battery can be improved, the heat exchange efficiency and the energy density of the battery are improved, and the service performance and the service life of the battery are 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

This section provides merely background information related to the present disclosure and is not necessarily prior art.

At present, with the rapid development of new energy automobiles, the energy density of the battery is gradually increased, so that the heating value of the battery is continuously increased, and the service life and the service performance of the battery are directly influenced by the temperature of the battery. And therefore require temperature management of the battery.

In the related art, the technical means of battery temperature control is mainly that the liquid cooling plates are arranged at the bottoms of a plurality of battery monomers, the liquid cooling plates occupy the internal space of the battery, the heat exchange efficiency is low, and the energy density and the service life of the battery are affected.

Disclosure of utility model

The application aims to provide a battery and an electricity utilization device, which are used for improving the space utilization rate of the battery and improving the heat exchange efficiency and the energy density of the battery. The aim is achieved by the following technical scheme:

In a first aspect, the present application provides a battery comprising: the electrolyte box comprises a box body frame, wherein a heat exchange flow channel is arranged in the box body frame and used for flowing a heat exchange medium, the box body frame is limited with a plurality of containing cavities used for containing electrolyte, and the containing cavities are provided with openings; a plurality of electrode assemblies, at least one electrode assembly being disposed in each of the receiving chambers; the end covers are covered on the openings, electrode terminals are arranged on the end covers, and the electrode terminals are electrically connected with the electrode assembly.

According to the battery provided by the application, the heat exchange flow channel is integrally arranged on the box body frame, so that a conventionally arranged liquid cooling plate is omitted, the structure of the battery can be simplified, the space utilization rate of the battery can be improved, and the energy density of the battery can be improved. In addition, the electrode assembly is directly accommodated in the accommodating cavity defined by the box body frame, so that a shell outside the electrode assembly is omitted, the energy density of the battery pack can be further improved, and the production process of the battery can be simplified. Meanwhile, as the heat exchange flow channel for the heat exchange medium to flow is arranged in the box body frame, when the battery is used, the heat exchange medium (such as water, cooling liquid or cooling gas and the like) can exchange heat inside the plurality of accommodating cavities in the circulating flow process of the box body frame so as to take away heat or cold generated in the plurality of accommodating cavities, thereby realizing the purpose of high-efficiency heat exchange of the battery and further being beneficial to prolonging the service life of the battery.

In addition, the battery provided by the application can also have the following additional technical characteristics:

In some embodiments of the present application, the case frame has a plurality of first beams extending in a first direction and a plurality of second beams extending in a second direction perpendicular to the first direction and defining a plurality of receiving cavities with the plurality of first beams; wherein the heat exchange flow channel is arranged in at least one of the first beam and the second beam.

The plurality of first beams are parallel and spaced, extend along the first direction, the plurality of second beams are parallel and spaced, extend along the second direction perpendicular to the first direction, so that a plurality of accommodating cavities can be defined between the plurality of second beams and the plurality of first beams, and the heat exchange flow channels are arranged in at least one of the first beams and the second beams so as to exchange heat in the side direction of the corresponding electrode assembly in each accommodating cavity, thereby improving the heat exchange efficiency in the accommodating cavities.

In some embodiments of the present application, the heat exchange flow channel is disposed in the first beam, penetrates through both ends of the first beam in the first direction, and forms an inlet and an outlet at the both ends of the first beam, respectively.

Through set up the heat transfer runner that link up the both ends of first roof beam along first direction in first roof beam to form import and export at the both ends of first roof beam along first direction, import and export accessible pipeline are linked together with the cooling pump, thereby realize that heat transfer medium can circulate in first roof beam, and first roof beam is as the lateral wall that every held the chamber, thereby can realize holding the intracavity portion and exchange heat, structure and principle are all simpler, easy realization.

In some embodiments of the present application, the number of the heat exchange channels in each of the first beams is plural, and the plural heat exchange channels in each of the first beams are arranged at intervals in the thickness direction of the tank frame.

The number of the heat exchange flow channels in each first beam is multiple, so that the number of the heat exchange flow channels is increased, the heat exchange efficiency of the battery is further improved, and the service life of the battery is further prolonged.

In some embodiments of the application, the box frame comprises a heat exchanger plate provided with the heat exchanger flow channels, the heat exchanger plate being configured as one of the first beam and the second beam and being for welded connection with the other of the first beam and the second beam.

That is, the heat exchange plate is disposed on the box frame, configured as one of the first beam and the second beam of the box frame, and defines a receiving chamber with the other of the first beam and the second beam, and has a heat exchange flow passage so as to exchange heat with the interior of the receiving chamber.

In some embodiments of the application, the first beam is a cross beam and the second beam is a stringer; and/or, the first beam is perpendicular to the second beam.

The first roof beam is the crossbeam, through set up the heat transfer runner in the crossbeam, and the crossbeam extends along the width direction of vehicle when the battery is installed, and the longeron extends along the length direction of vehicle to can reduce the risk that leads to all crossbeams to be easy to crumble when the one side striking of vehicle width direction.

In some embodiments of the present application, the accommodating chamber is provided with a first opening and a second opening along two sides of the thickness direction of the box frame, respectively; the battery also comprises a first box body which is fixedly connected with the box body frame, one of the first box body and the plurality of end covers the first opening, and the other one covers the second opening.

The accommodating cavity is provided with a first opening and a second opening, the first opening is sealed by covering the first box body on the plurality of first openings, the plurality of end covers are correspondingly covered on the plurality of second openings to seal the plurality of second openings, or the first box body is covered on the plurality of second openings to seal the plurality of second openings, and the plurality of end covers are correspondingly covered on the plurality of first openings to seal the plurality of first openings, so that the risk of overflow after electrolyte is injected into the accommodating cavity can be reduced. In addition, the first box body also has a safety protection function so as to reduce the risk of damage caused by collision of external equipment parts with the box body frame and the internal electrode assembly.

In some embodiments of the application, the battery further comprises an integrated busbar electrically connected to the electrode terminals of the plurality of end caps.

The integrated busbar is electrically connected with the electrode terminals on the end covers so as to realize series connection or series-parallel connection between the electrode terminals on the end covers, and the integrated busbar can be electrically connected with a battery management system so as to safely manage and control the battery.

In some embodiments of the application, the battery further comprises a second box body, and the second box body is arranged on one side of the integrated busbar, which is away from the box body frame, and is fixedly connected with the box body frame.

Through setting up the second box in the one side that deviates from the box frame of the female row of integration, second box and box frame fixed connection, the second box plays the safety protection effect, reduces the risk that battery external environment and battery inner structure collide and take place to damage to improve the safety in utilization of battery.

In some embodiments of the application, the first tank is connected with the tank frame in an insulating manner; and/or an insulating layer is arranged on one side of the end cover facing the accommodating cavity.

The first box body is connected with the box body frame in an insulating mode, so that the risk of short circuit of the battery can be reduced, and the use safety of the battery can be improved.

And similarly, the insulating layer is arranged on one side of the end cover, which faces the accommodating cavity, so that the inner wall surface of the accommodating cavity and the electrolyte are insulated from the end cover, the risk of short circuit of the battery is reduced, and the use safety of the battery is improved.

In some embodiments of the application, the first housing is an insulator; and/or, the box body frame is an insulating piece; and/or, the end cap is an insulator.

Through establishing first box as the insulating part, perhaps be equipped with the insulating part with the box frame, perhaps establish the end cover as the insulating part again to make can insulating connection between first box and second box and the box frame, thereby reduce the risk of battery short circuit.

In some embodiments of the application, the end cap is provided with a fill port in communication with the receiving chamber.

The liquid injection port arranged on the end cover is communicated with the liquid injection device, so that electrolyte is injected into the accommodating cavity through the liquid injection device, and the liquid injection port is sealed through sealing elements such as sealing nails after the liquid injection is completed.

In a second aspect, the present application provides an electrical device comprising a battery according to any of the embodiments of the first aspect, the battery being adapted to power the electrical device.

The power utilization device provided by the application comprises the battery according to any one of the embodiments of the first aspect, so that the power utilization device has the technical effects of any one of the embodiments, and is not described herein.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:

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

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

FIG. 3 is an enlarged schematic view of the portion A in FIG. 2;

fig. 4 is a partially exploded view of a battery according to another view angle of some embodiments of the present application;

In fig. 1, the direction of the X axis of the coordinate system indicates a first direction, the direction of the Y axis indicates a second direction, and the direction of the Z axis indicates the thickness direction of the box frame.

The reference numerals are as follows:

1000. A vehicle;

100. A battery; 200. a controller; 300. a motor;

10. A box frame; 20. an electrode assembly; 30. an end cap; 40. an integrated busbar; 50. a first case; 60. a second case;

11. A receiving chamber; 12. a heat exchange flow passage; 13. a first beam; 14. a second beam; 31. an electrode terminal;

111. An opening.

Detailed Description

Embodiments of the technical scheme 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 aspects of the present application, and thus are merely examples, and are not intended to limit 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 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 of the application and the claims and the description of the drawings above are intended to cover a non-exclusive inclusion.

In the description of embodiments of the present application, the technical terms "first," "second," and the like 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 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, and indicates that three relationships may exist, for example, a and/or B may indicate: 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" means two or more (including two), and similarly, "plural sets" means two or more (including two), and "plural sheets" means 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", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore 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 should 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 specific circumstances.

Currently, the application of power batteries is more widespread from the development of market situation. The power battery is not only applied to energy storage power supply systems such as hydraulic power, firepower, wind power and solar power stations, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles, electric automobiles, and the like, and a plurality of fields such as military equipment, aerospace, and the like. With the continuous expansion of the application field of the power battery, the market demand of the power battery is also continuously expanding.

Along with the rapid development of new energy automobiles, the energy density of the battery is gradually increased, so that the heating value of the battery is continuously increased, and the service life and the service performance of the battery are directly influenced by the temperature of the battery. And therefore require temperature management of the battery.

In the related art, the technical means of battery temperature control is mainly that the liquid cooling plates are arranged at the bottoms of a plurality of battery monomers, the liquid cooling plates occupy the internal space of the battery, the heat exchange efficiency is low, and the energy density and the service life of the battery are affected.

In order to solve the problems that a liquid cooling plate occupies the internal space of a battery and the heat exchange efficiency is low, the application designs a battery which comprises a box body frame, an electrode assembly and an end cover. The plurality of containing cavities are defined by the box body frame and are provided with openings, the openings of each containing cavity are covered by the end cover, at least one electrode assembly is arranged in each containing cavity, and the electrode assemblies are electrically connected with the electrode terminals on the end cover. And the heat exchange flow channel is integrated in the box body frame, so that the box body frame has a heat exchange effect when a heat exchange medium circularly flows in the box body frame, and heat generated by each accommodating cavity can be taken away, so that heat exchange of the battery is realized, the internal space of the battery is saved, the product structure is simplified, the production cost is reduced, the heat exchange efficiency of the battery can be obviously improved, the energy density of the battery is improved, and the service performance and the service life of the battery are improved.

The battery disclosed by the embodiment of the application can be used in electric devices such as vehicles, ships or aircrafts, but is not limited to the electric devices. The power supply system with the battery disclosed by the application can be used for forming the power utilization device, so that the heat exchange efficiency of the battery is improved, and the stability of the battery performance and the service life of the battery are improved.

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

For convenience of description, the following embodiment will take an electric device according to an embodiment of the present application as an example of the vehicle 1000.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a vehicle 1000 according to some embodiments of the 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 to 4, fig. 2 is an exploded view of a battery according to some embodiments of the present application; FIG. 3 is an enlarged schematic view of the portion A in FIG. 2; fig. 4 is a partially exploded view of a battery according to another view angle of some embodiments of the present application. The present application provides a battery comprising: a case frame 10, a plurality of electrode assemblies 20, and a plurality of end caps 30. The heat exchange flow channel 12 is arranged in the box frame 10, the heat exchange flow channel 12 is used for flowing a heat exchange medium, the box frame 10 is limited with a plurality of containing cavities 11 used for containing electrolyte, and the containing cavities 11 are provided with openings 111; at least one electrode assembly 20 is disposed in each receiving chamber 11; the plurality of end caps 30 are capped at the openings 111, and the end caps 30 are provided with electrode terminals 31, the electrode terminals 31 being electrically connected to the electrode assembly 20.

In the present embodiment, the box frame 10 is illustratively a profile frame structure, and the heat exchange flow channels 12 in the box frame 10 are used for flowing a heat exchange medium. The heat exchange medium can be water, cooling liquid or cooling gas, etc.

The accommodating chambers 11 are for accommodating an electrolyte, and the accommodating chambers 11 have openings 111, the end caps 30 are for covering the openings 111, the openings 111 are for mounting the electrode assemblies 20, and the electrode assemblies 20 are mounted in the accommodating chambers 11 and electrically connected with the electrode terminals 31 on the end caps 30, so that each accommodating chamber 11 is configured as a separate power supply unit.

The end cap 30 refers to a member that is capped at the opening 111 of the accommodating chamber 11 to isolate the inner environment of the accommodating chamber 11 from the outer environment. Without limitation, the shape of the end cap 30 may be adapted to the shape of the housing to fit the housing. The end cap 30 may be integrally connected with the case frame 10, or may be separately connected. Alternatively, the end cap 30 may be made of a material having a certain hardness and strength (e.g., aluminum alloy), so that the end cap 30 is not easily deformed when being impacted by extrusion, thereby improving the safety of the battery. The end cap 30 is provided with functional components such as electrode terminals 31. The electrode terminals 31 may be used to be electrically connected with the electrode assembly 20 for outputting or inputting electric power of the battery cells. In some embodiments, insulation may also be provided on the inside of the end cap 30, which may be used to isolate electrical connection components within the receiving cavity 11 from the end cap 30 to reduce the risk of short circuits. By way of example, the insulation may be plastic, rubber, or the like.

The electrode assembly 20 is a component in which electrochemical reactions occur in the battery. Each of the receiving chambers 11 may contain one or more electrode assemblies 20 therein. The electrode assembly 20 is mainly formed by winding or stacking a positive electrode sheet and a negative electrode sheet, and a separator is generally provided between the positive electrode sheet and the negative electrode sheet. The portions of the positive and negative electrode sheets having active material constitute the main body portion of the electrode assembly 20, and the portions of the positive and negative electrode sheets having no active material constitute the tabs, 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, the positive electrode active material and the negative electrode active material react with the electrolyte, and the tab is connected to the electrode terminal 31 to form a current loop.

According to the battery provided by the application, the heat exchange flow channel 12 is integrally arranged on the box body frame 10, so that a conventionally arranged liquid cooling plate is omitted, the structure of the battery can be simplified, the space utilization rate of the battery can be improved, and the energy density of the battery can be improved. In addition, the heat exchange flow path 12 can absorb the expansion force of the electrode assembly 20 to adjust the internal stress of the battery. By directly accommodating the electrode assembly 20 in the accommodating chamber 11 defined by the case frame 10, a case outside the electrode assembly 20 is omitted, and not only can the energy density of the battery pack be further improved, but also the production process of the battery can be simplified. Meanwhile, as the heat exchange flow channel 12 for flowing the heat exchange medium is arranged in the box frame 10, when the battery is used, the heat exchange medium can exchange heat inside the plurality of accommodating cavities 11 in the circulating flow process of the box frame 10 so as to take away heat or cold generated in the plurality of accommodating cavities 11, thereby realizing the purpose of high-efficiency heat exchange of the battery and further being beneficial to prolonging the service life of the battery.

Referring to fig. 2 to 4, according to some embodiments of the present application, a box frame 10 has a plurality of first beams 13 and a plurality of second beams 14, the plurality of first beams 13 extending in a first direction, the plurality of second beams 14 extending in a second direction perpendicular to the first direction, and defining a plurality of receiving cavities 11 therebetween; wherein at least one of the first beam 13 and the second beam 14 is provided with a heat exchange flow passage 12.

In the present embodiment, the plurality of first beams 13 are arranged in parallel and spaced apart, and each extend along the first direction, and the plurality of second beams 14 are arranged in parallel and spaced apart, and extend along the second direction perpendicular to the first direction, so that the accommodating cavity 11 can be defined between two adjacent first beams 13 and two adjacent second beams 14.

By providing the heat exchange flow passage 12 in at least one of the first and second beams 13 and 14, the heat exchange efficiency to the inside of the accommodating chambers 11 can be improved by exchanging heat to the side direction of the corresponding electrode assembly 20 inside each accommodating chamber 11.

Referring to fig. 2, according to some embodiments of the present application, a heat exchange flow channel 12 is disposed in a first beam 13, and the heat exchange flow channel 12 penetrates through both ends of the first beam 13 along a first direction, and an inlet and an outlet are formed at both ends of the first beam 13, respectively.

In this embodiment, by arranging the heat exchange flow channels 12 penetrating through the two ends of the first beam 13 along the first direction in the first beam 13, and forming the inlet and the outlet at the two ends of the first beam 13 along the first direction, the inlet and the outlet can be communicated with the cooling pump through pipelines, so that the heat exchange medium can circularly flow in the first beam 13, and the first beam 13 serves as the side wall of each accommodating cavity 11, so that heat exchange can be performed inside the accommodating cavity 11, and the structure and the principle are simpler and easy to implement.

Referring to fig. 2 and 4, according to some embodiments of the present application, the number of heat exchange channels 12 in each first beam 13 is plural, and the plural heat exchange channels 12 in each first beam 13 are arranged at intervals along the thickness direction of the box frame 10.

In this embodiment, the number of the heat exchange channels 12 is increased by setting the number of the heat exchange channels 12 in each first beam 13 to be plural, so that the heat exchange efficiency of the battery is further improved, and the service life of the battery is further improved.

According to some embodiments of the application, the tank frame 10 comprises a heat exchanger plate provided with heat exchanger channels 12, the heat exchanger plate being configured as one of the first beam 13 and the second beam 14 and being intended for welded connection with the other of the first beam 13 and the second beam 14.

In the present embodiment, i.e., the heat exchange plate is provided to the case frame 10 and configured as one of the first beam 13 and the second beam 14 of the case frame 10, and defines the accommodating chamber 11 with the other of the first beam 13 and the second beam 14, the heat exchange plate has the heat exchange flow passage 12 so as to exchange heat to the inside of the accommodating chamber 11.

According to some embodiments of the application, the first beam 13 is a cross beam and the second beam 14 is a longitudinal beam; the first beam 13 is perpendicular to the second beam 14.

In the present embodiment, when the battery 100 is mounted, the cross member extends in the width direction of the vehicle, and the side member extends in the length direction of the vehicle.

By providing the first beam 13 as a cross beam and providing a heat exchange flow path in the cross beam, the risk of all the cross beams being easily crushed when one side in the vehicle width direction is impacted can be reduced.

According to some embodiments of the present application, the accommodating chamber 11 is provided with a first opening and a second opening along both sides of the thickness direction of the case frame 10, respectively; the battery further comprises a first box 50, the first box 50 is fixedly connected with the box frame 10, one of the first box 50 and the plurality of end covers 30 is covered on the first opening, and the other is covered on the second opening.

In the present embodiment, the two ends of the housing cavity 11 along the thickness direction of the box frame 10 are respectively provided with a first opening and a second opening, and by capping the first box 50 on the first openings to seal the first openings and capping the end caps 30 on the second openings to seal the second openings, or capping the first box 50 on the second openings to seal the second openings and capping the end caps 30 on the first openings to seal the first openings, the risk of overflow after the electrolyte is injected into the housing cavity 11 can be reduced.

In addition, since the first case 50 and the end cap 30 do not occupy the inner space of the accommodating chamber 11, thereby improving the space utilization rate in the accommodating chamber 11, contributing to an improvement in the amount of electrolyte injected in a single accommodating chamber 11, and thus improving the overall energy density of the battery. The first case 50 also has a safety protection function to reduce the risk of damage caused by collision of external equipment pieces with the case frame 10 and the internal electrode assembly 20.

Referring to fig. 2 and 4, the battery further includes an integrated bus bar 40, and the integrated bus bar 40 is electrically connected with the electrode terminals 31 of the plurality of end caps 30 according to some embodiments of the present application.

In this embodiment, the integrated busbar 40 mainly comprises a signal acquisition component, a plastic structural component, a copper aluminum busbar and the like, and is connected into a whole through a hot pressing or riveting process and the like, so that series-parallel connection of the battery cells, temperature sampling of the battery cells and voltage sampling of the battery cells are realized, and temperature and voltage are provided for a battery pipeline system through a circuit board and a connector component. The battery pack has the advantages of light and thin structure, high integration level and the like, is favorable for improving the space utilization rate and the assembly efficiency of the battery pack, and accords with the trend of light weight, integrated part systems and large modules of automobiles.

By electrically connecting the integrated bus bar 40 with the electrode terminals 31 on the plurality of end caps 30, serial connection or serial-parallel connection between the electrode terminals 31 on the plurality of end caps 30 is achieved, and safety control of the battery can be achieved.

Referring to fig. 2, according to some embodiments of the present application, the battery further includes a second case 60, and the second case 60 is disposed on a side of the integrated busbar 40 facing away from the case frame 10 and is fixedly connected with the case frame 10.

Through set up second box 60 in the one side that integrated female row 40 deviates from box frame 10, second box 60 and box frame 10 fixed connection, second box 60 plays the safety protection effect, reduces the battery external environment and the risk that the battery inner structure collided and take place to damage to improve the safety in utilization of battery.

According to some embodiments of the present application, the first casing 50 is connected with the casing frame 10 in an insulating manner, and the side of the end cap 30 facing the accommodating chamber 11 is provided with an insulating layer.

In the present embodiment, the first casing 50 is an insulating member, or an insulating film is provided on a side of the first casing 50 facing the casing frame 10, and is fixedly connected with the casing frame 10 by a fixed connection member, for example. The first casing 50 is connected with the casing frame 10 in an insulating manner, so that the risk of short circuit of the battery can be reduced, and the use safety of the battery can be improved.

Similarly, an insulating layer is arranged on one side, facing the accommodating cavity 11, of the end cover 30, so that the inner wall surface of the accommodating cavity 11 and the electrolyte are insulated from the end cover 30, the risk of short circuit of the battery is reduced, and the use safety of the battery is improved.

According to some embodiments of the present application, the first case 50, the case frame 10, and the second case 60 are all insulating members. Thus, the risk of short circuit of the battery 100 can be reduced without providing an insulating layer, which is advantageous for further simplifying the production process of the product.

According to some embodiments of the application, the end cap 30 is provided with a filling port (not shown in the figures) which communicates with the containing chamber 11.

In this embodiment, the liquid injection port provided in the end cap 30 is used for communicating with a liquid injection device, so that the electrolyte is injected into the accommodating cavity 11 through the liquid injection device, and after the injection is completed, the liquid injection port is sealed by a sealing element such as a sealing nail.

According to some embodiments of the present application, the first casing 50 is provided with a pressure relief mechanism for opening to relieve pressure when the pressure or temperature in the accommodating chamber 11 reaches a preset threshold.

According to some embodiments of the present application, referring to fig. 1 to 3, the present application provides a battery including: the first case 50, the second case 60, the case frame 10, the plurality of electrode assemblies 20, the integrated bus bar 40, and the plurality of end caps 30. The case frame 10 is disposed between the first case 50 and the second case 60, and is connected to the first case 50 and the second case 60 in an insulating manner. The box frame 10 includes a plurality of first beams 13 and a plurality of second beams 14, the plurality of first beams 13 extend along a first direction and are arranged at intervals along a second direction, the plurality of second beams 14 extend along the second direction and are arranged at intervals along the first direction, a plurality of accommodating cavities 11 are defined between the plurality of first beams 13 and the plurality of second beams 14, and heat exchange flow channels 12 are arranged in the plurality of first beams 13 and/or the plurality of second beams 14, and the heat exchange flow channels 12 are used for flowing heat exchange media. The housing cavity 11 is provided with a first opening 111 and a second opening 111 along two sides of the thickness direction of the case frame 10, the first case 50 is covered on the plurality of first openings 111, the plurality of end caps 30 are correspondingly covered on the plurality of second openings 111, and the end caps 30 are provided with electrode terminals 31. At least one electrode assembly 20 is disposed in each receiving chamber 11, and the electrode assembly 20 correspondingly disposed in each receiving chamber 11 is electrically connected with the electrode terminal 31 of the cap 30. The integrated bus bar 40 is electrically connected to the electrode terminals 31 on the plurality of end caps 30, and is located between the second case 60 and the end caps 30. Like this, box frame 10 integration sets up heat transfer runner 12 for battery space utilization obtains promoting, helps improving the energy density of battery, and through carrying out the heat transfer to the side of every holding chamber 11, helps improving heat exchange efficiency, and improves the performance and the life of battery.

The present application is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present application are intended to be included in the scope of the present application. Therefore, the protection scope of the application is subject to the protection scope of the claims.

Claims (13)

1.A battery, comprising:

The electrolyte box comprises a box body frame, wherein a heat exchange flow channel is arranged in the box body frame and used for flowing a heat exchange medium, the box body frame is limited with a plurality of containing cavities used for containing electrolyte, and the containing cavities are provided with openings;

A plurality of electrode assemblies, at least one electrode assembly being disposed in each of the receiving chambers;

The end covers are correspondingly covered on the openings of the accommodating cavities, and are provided with electrode terminals which are electrically connected with the electrode assembly.

2. The battery of claim 1, wherein the case frame has a plurality of first beams extending in a first direction and a plurality of second beams extending in a second direction intersecting the first direction and defining a plurality of the receiving cavities with the plurality of first beams;

Wherein the heat exchange flow channel is arranged in at least one of the first beam and the second beam.

3. The battery of claim 2, wherein the heat exchange flow channels are provided in the first beam, penetrate through both ends of the first beam in the first direction, and form an inlet and an outlet at the both ends of the first beam, respectively.

4. The battery according to claim 3, wherein the number of the heat exchange flow passages in each of the first beams is plural, and the plural heat exchange flow passages in each of the first beams are arranged at intervals in the thickness direction of the case frame.

5. The battery of claim 2, wherein the box frame includes a heat exchange plate provided with the heat exchange flow channels, the heat exchange plate being configured as one of the first beam and the second beam and for welded connection with the other of the first beam and the second beam.

6. The battery of any one of claims 2-5, wherein the first beam is a cross beam and the second beam is a side beam;

and/or, the first beam is perpendicular to the second beam.

7. The battery according to any one of claims 1 to 5, wherein the accommodation chamber is provided with a first opening and a second opening, respectively, on both sides in a thickness direction of the case frame;

The battery also comprises a first box body which is fixedly connected with the box body frame, one of the first box body and the plurality of end covers the first opening, and the other one covers the second opening.

8. The battery of any one of claims 1-5, further comprising an integrated busbar electrically connected to the electrode terminals of a plurality of the end caps.

9. The battery of claim 8, further comprising a second housing disposed on a side of the integrated busbar facing away from the housing frame and fixedly connected thereto.

10. The battery of claim 7, wherein the first housing is connected in insulation with the housing frame;

And/or an insulating layer is arranged on one side of the end cover facing the accommodating cavity;

And/or, each accommodating cavity is internally provided with an insulating layer.

11. The battery of claim 7, wherein the first housing is an insulating member;

and/or, the box body frame is an insulating piece;

And/or, the end cap is an insulator.

12. The battery of any one of claims 1-5, wherein the end cap is provided with a fill port in communication with the receiving cavity.

13. An electrical device comprising a battery as claimed in any one of claims 1 to 12 for powering the electrical device.