CN113113716B - Battery package and electric device - Google Patents
Battery package and electric device Download PDFInfo
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- CN113113716B CN113113716B CN202110303040.3A CN202110303040A CN113113716B CN 113113716 B CN113113716 B CN 113113716B CN 202110303040 A CN202110303040 A CN 202110303040A CN 113113716 B CN113113716 B CN 113113716B
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- battery
- detection device
- battery pack
- opening
- battery cell
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The embodiment of the invention relates to a battery pack and an electric device, wherein the battery pack comprises a shell, a battery module and a structural part, the shell is provided with a containing cavity, the battery module and the structural part are contained in the containing cavity, the battery module comprises a plurality of battery cells, the structural part is provided with an opening, the battery pack further comprises a detection device, the opening is used for enabling the detection device to penetrate through the structural part, and the detection device is connected with the battery cells. Through set up on the structure the opening, then when the battery package was assembled, can install battery module, structure in the casing, then with detection device pass through opening on the structure inserts the intracavity is acceptd to the casing to make detection device be connected with electric core, it is very convenient.
Description
Technical Field
The embodiment of the invention relates to the technical field of batteries, in particular to a battery pack and an electric device.
Background
A battery pack is a device that converts external energy into electrical energy and stores the electrical energy in the battery pack, so as to supply power to an external electric device (such as a portable electronic device) at a desired time. The battery pack comprises a shell, a battery module and a structural member, wherein the battery module comprises a plurality of superposed battery cores, the battery module is arranged in the shell, and the structural member is arranged in the shell. In order to ensure the use safety of the battery core, a detection device is often required to be installed in the battery pack, so as to monitor the temperature, humidity and the like of the battery core in the battery pack.
At present, when detection device and battery package were installed, when carrying out the superpose equipment to a plurality of electric cores, installed detection device between two adjacent electric cores, then installed the battery module that a plurality of electric cores are constituteed and together with detection device in the casing, installed the structure again at last, manufacturing process is complicated.
Disclosure of Invention
In view of the above problems, embodiments of the present invention provide a battery pack and a power consumption device, which improve the problem that a detection device in the battery pack is inconvenient to install.
According to an aspect of an embodiment of the present invention, a battery pack is provided, including a housing, a battery module, a structural member, and a detection device, where the housing is provided with an accommodating cavity, the battery module and the structural member are accommodated in the accommodating cavity, the battery module includes a plurality of battery cells, the structural member is provided with an opening, the opening is used for the detection device to pass through the structural member, and the detection device is connected with the battery cells. Through set up the opening on the structure, then when the battery package assembles, can install battery module, structure in the casing, then pass through detection device the opening on the structure inserts the intracavity is acceptd to the casing to make detection device be connected with electric core, it is very convenient
Further, in some embodiments, when the detection device is damaged, the detection device is pulled out from the opening to be replaced.
In an alternative form, the detection means comprises a temperature sensor.
In an alternative form, the structural member includes a circuit board. That is, the opening is arranged on the circuit board, so that when the detection device is installed, no extra structural part is required to be arranged additionally, and the structure of the battery pack is simple and compact.
In an alternative form, the circuit board includes a Battery Management System (BMS).
In an alternative mode, the detection device comprises an insulating layer, a detection part and a detection device body; the detecting part is connected with the detecting device body, the detecting part is connected with the battery core, the insulating layer is formed by arranging flowing resin on the periphery of the detecting part and the detecting device body and then fixing the flowing resin, and the insulating layer wraps at least part of the detecting part and at least part of the detecting device body. The detection device body further comprises a connecting piece, the connecting piece extends out of the insulating layer, and the connecting piece is used for being connected with the circuit board. The insulating layer can protect the detecting part and the detecting device body, reduces the damage to the detecting part and the detecting device body caused by other structural parts in the manufacturing or transporting process, and prolongs the service life of the detecting part and the detecting device body. The connecting piece is arranged to facilitate the connection of the detection device and the circuit board.
In an alternative form, the resin includes glue, and the insulating layer is formed by fixing a flowing glue around the detecting portion and the detecting device body. The insulating layer can be designed into different shapes and structures according to requirements, and is favorable for mounting and protecting the detection part and the detection device body.
In an optional mode, the resin includes a potting adhesive, and the insulating layer is formed by fixing a flow adhesive around the detecting portion and the detecting device body. The insulating layer can be designed into different shapes and structures according to requirements, and is favorable for mounting and protecting the detection part and the detection device body.
In an alternative mode, the insulating layer is formed by fixing a flowing resin on the periphery of the detecting portion and the detecting device body through an injection molding process. The insulating layer can be designed into different shapes and structures according to requirements, and is favorable for mounting and protecting the detection part and the detection device body.
In an alternative mode, the insulating layer is formed by fixing a flowing resin on the periphery of the detecting portion and the detecting device body through a low-pressure injection molding process. The insulating layer can be designed into different shapes and structures according to requirements, and is favorable for mounting and protecting the detection part and the detection device body. In an alternative form, the connector comprises a wire. The wires are connected to a Battery Management System (BMS).
In an optional mode, the insulating layer includes a first portion, a second portion and a third portion that are connected in sequence, the second portion is disposed in the opening, the first portion and the third portion are disposed on two opposite sides of the structural member, and the detecting portion is disposed on the first portion.
In an alternative form, the third portion is at least partially connected to the structural member. The third part is at least partially connected with the structural part to limit the third part from passing through the opening, so that the battery pack is compact in structure and the detection device is stably connected with the battery pack.
In an alternative mode, the third portion is disposed away from the battery cell, and the connecting member extends out of the insulating layer from the third portion. Because the detection part is arranged on the first part, the third part is far away from the battery core and is close to the structural part, when the structural part is a circuit board, the connecting piece extends out of the third part, and the connecting piece is convenient to wire with the circuit board.
In an optional manner, the battery cell is sequentially arranged along a first direction, the battery cell includes an encapsulation shell, an electrode assembly, and a conductive piece, the encapsulation shell includes a receiving portion and a first sealing portion formed from a periphery of the receiving portion, one end of the conductive piece is connected to the electrode assembly, the other end of the conductive piece extends out of the encapsulation shell from the first sealing portion, and the electrode assembly is disposed in the receiving portion; the shell comprises a first side wall and a second side wall which are oppositely arranged along a second direction, the first side wall is provided with a first groove and an opening which is communicated with the first groove and the accommodating cavity, the first part enters the first groove from the opening of the structural part and the first groove, and the detecting part is connected to the battery cell through the opening; along the second direction, the first part is arranged between the accommodating part and the first side wall, and the detection device is stably connected with the shell by arranging the first groove.
In an optional mode, the battery cell comprises a soft package lithium ion battery, and the packaging shell comprises an aluminum plastic film.
In an optional mode, the package further includes a second sealing portion extending from the accommodating portion, and the second sealing portion is disposed between the first portion and the accommodating portion along the second direction. The detection device is separated from the battery core through the second edge sealing part, the detection device has a certain distance from the battery core, the detection device is not easy to damage due to heat generated by the battery core, and the service life of the detection device is long.
In an alternative form, the opening overlaps the second sealing edge portion as viewed in the second direction. Then detection device passes through the opening on the structure and inserts the casing, then passes the trompil again and can be connected with electric core, then the area of connection of detection device and electric core increases, is favorable to improving detection accuracy.
In an alternative mode, the detection device is in contact connection with the second sealing edge portion.
In an optional manner, the insulating layer is provided with a connecting portion facing the accommodating cavity, the detecting portion is provided on the connecting portion, and the connecting portion at least partially overlaps the second edge sealing portion when viewed along the second direction. Through setting up connecting portion, listen the position in connecting portion, then it is close to the distance of electric core to listen the portion, is favorable to improving and detects the precision.
In an alternative mode, the connecting portions are respectively connected to the first portion, the second portion and the third portion, the connecting portions face the accommodating cavity, and a cross section of the insulating layer along the second direction is T-shaped. Through adjusting connecting portion orientation and accepting the one end of chamber at the ascending size of second side, the distance of adjustable sense portion and electric core can realize the accurate measurement to the temperature of electric core, humidity, can improve detection device's life again.
In an optional mode, the battery cells are sequentially arranged along a first direction, each battery cell includes a packaging shell, an electrode assembly and a conductive piece, each packaging shell includes a receiving portion and a first edge sealing portion formed around the receiving portion, one end of each conductive piece is connected with the electrode assembly, the other end of each conductive piece extends out of the packaging shell from the first edge sealing portion, and the electrode assembly is arranged in the receiving portion. The insulating layer is provided with a connecting portion facing the accommodating cavity, the detecting portions are arranged on the connecting portion, the connecting portion are located between the first edge sealing portions of the two adjacent battery cells, and the detecting portions are connected to the first edge sealing portions of at least one of the two adjacent battery cells. But the clearance between the first edge sealing portion of connecting portion abundant utilization two adjacent electric cores sets up, and the battery package is little in the ascending size of second side, and the energy density of battery package is high.
In an optional manner, the battery pack further includes a resin layer disposed in the accommodating cavity, the resin layer is formed by fixing flowing resin after the resin layer is disposed in the accommodating cavity, and the resin layer connects the connecting portion and the battery cell. Through setting up the resin layer, then can realize the fixed connection between detection device, casing and the electricity core.
In an optional mode, a protruding portion extends from the insulating layer, and when the detection device is connected to the battery cell through the opening, the protruding portion abuts against the structural member. Whereby the movement of the detecting means is limited in a third direction, which is perpendicular to the first direction and perpendicular to the second direction
In an alternative form, the projection is formed extending from the third portion.
In an alternative mode, the first portion is inserted between two adjacent battery cells, the adjacent battery cells clamp the first portion, and the detecting portion abuts against the accommodating portion of at least one of the two adjacent battery cells. Therefore, the detection device can be arranged by fully utilizing the gap between the accommodating parts of the two adjacent battery cells, the size of the battery pack in the second direction is small, and the energy density of the battery pack is high.
In an optional mode, along the third direction, sense portion butt in the third department that electric core is played by first banding to reasonable setting detection device ensures detection device to the measurement accuracy of electric core and improves the life of electric core.
According to an aspect of the embodiment of the invention, an electric device is provided, which comprises a load and the battery pack, wherein the load is connected with the battery pack.
The embodiment of the invention has the beneficial effects that: the structure of battery package is provided with the opening, the battery package still includes detection device, the opening is used for detection device passes the structure, detection device with electricity core is connected. Through set up on the structure the opening, then when the battery package assembles, can install battery module, structure in the casing, then insert detection device through the opening on the structure the accommodate intracavity of casing, detection device is connected with electric core, and is very convenient.
Furthermore, the detection device comprises an insulating layer, the insulating layer is formed by fixing the flowing resin on the periphery of the detection part and the detection device body through a low-pressure injection molding process, and the detection part and the detection device body are protected in the assembling process.
Further, the battery pack includes a resin layer, and the resin layer may be filled in the receiving cavity of the housing before or after the detection device is mounted on the battery pack. The detection device is connected with the battery cell and the shell through the resin layer, so that the connection of the detection device with the battery cell and the shell is stable.
Drawings
One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.
Fig. 1 is a schematic diagram of a battery pack provided by an embodiment of the present invention;
fig. 2 is an exploded view of one implementation of a battery pack provided by an embodiment of the present invention;
FIG. 3 is an enlarged schematic view of section A of FIG. 2 according to an embodiment of the present invention;
fig. 4 is an exploded schematic view of another implementation of a battery pack provided by an embodiment of the invention;
fig. 5 is a partial schematic view of a battery pack provided by an embodiment of the present invention;
FIG. 6 is an enlarged schematic view of portion B of FIG. 5 according to an embodiment of the present invention;
fig. 7 is a schematic diagram of one direction of a battery cell provided by an embodiment of the invention;
fig. 8 is a schematic diagram of another direction of a battery cell provided by an embodiment of the invention;
fig. 9 is another schematic diagram of a battery pack provided by an embodiment of the invention;
FIG. 10 is a schematic structural diagram of an embodiment of a detection device according to the present invention, in which an insulation layer partially covers a detection device body and a detection portion;
FIG. 11 is a schematic structural diagram of a detecting device provided in an embodiment of the present invention without an insulating layer;
FIG. 12 is a schematic view of one embodiment of a detection device provided in accordance with the present invention;
FIG. 13 is a schematic diagram of another implementation of a detection apparatus provided by an embodiment of the invention;
fig. 14 is a schematic cross-sectional view of one direction of a battery pack according to an embodiment of the present invention;
FIG. 15 is an enlarged schematic view of section C of FIG. 14 in accordance with an embodiment of the present invention;
fig. 16 is an enlarged schematic view of a portion D in fig. 14 according to an embodiment of the present invention.
Detailed Description
In order to facilitate an understanding of the invention, reference will now be made in detail to the present embodiments of the invention, examples of which are illustrated in the accompanying drawings. It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present. The terms "vertical," "horizontal," "left," "right," "inner," "outer," and the like as used herein are for purposes of description only.
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 invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1 to 3, a battery pack 100 includes: the battery pack comprises a shell 1, a battery module 2 and a structural member 3. Casing 1 is provided with accepts chamber 11, and battery module 2 and structure 3 are acceptd in accepting chamber 11, and battery module 2 includes a plurality of electric cores 21, and is preferred, electric core 21 superposes in proper order along first direction L1. The structure 3 is provided with an opening 31 and the detection device 4 is connected to the structure 3. The opening 31 is used for the detection device 4 to pass through the structural member 3, so that the detection device 4 is connected with the battery cell 21. Through set up opening 31 on structure 3, then when battery package 100 assembles, can install battery module 2, structure 3 in casing 1, then insert detection device 4 in accepting the chamber 11 of casing 1 through opening 31 on structure 3 to make detection device 4 be connected with electric core 21, it is very convenient. When the detection device 4 is damaged, the battery pack 100 does not need to be disassembled, and the detection device 4 only needs to be pulled out from the opening 31 for replacement.
In some embodiments, the detection device 4 comprises a temperature sensor.
In some embodiments, referring to fig. 4, the structural member 3 includes a circuit board 3s.
It should be noted that the term "connected" as referred to in the present application includes contact connection and connection through other structures, wherein contact connection includes abutting connection, fixed connection, detachable connection, and the like.
Referring to fig. 5 and 6 for the housing 1, in some embodiments, the housing 1 includes a first side wall 12 and a second side wall 13 oppositely disposed along the second direction L2.
The first side wall 12 is provided with a first groove 121 and an opening 122 communicating the first groove 121 with the accommodating cavity 11 of the housing 1, the first groove 121 is used for accommodating the detection device 4 for plugging, and the opening 122 is used for connecting the detection device 4 with the battery cell 21, so that the detection device 4 can detect the temperature, humidity and the like of the battery cell 21.
In some embodiments, the second side wall 13 is also provided with a first groove 121 for plugging the detection device 4, and an opening 122 for communicating the first groove 121 with the receiving cavity 11 of the housing 1, where the opening 122 is used for connecting the detection device 4 with the battery cell 21.
In some embodiments, the number of the openings 31 may be plural, and the plural openings 31 are distributed in the structural member 3.
Referring to fig. 2, 7 and 8, the battery module 2 includes a plurality of battery cells 21 stacked along a first direction L1, and each battery cell 21 includes an encapsulating case 211, an electrode assembly (not shown), and a conductive member 212. The package 211 includes a receiving portion 2111 and a first sealing portion 2112. The first sealing portion 2112 is formed by extending the housing 1 from the accommodating portion 2111. One end of conductive element 212 is connected to the electrode assembly, and the other end of conductive element 212 extends out of package case 211 from first sealing portion 2112, and the electrode assembly is disposed on package case 211. In some embodiments, the detecting device 4 is disposed between two adjacent first sealing portions 2112, and preferably, the detecting device 4 abuts against the first sealing portions 2112.
In some embodiments, the package 211 further includes a second sealing portion 2113, and the second sealing portion 2113 is formed by extending the housing 1 from the accommodating portion 2111. The detection device 4 is connected to the second sealing portion 2113. Preferably, the detecting device 4 is connected to the second sealing portion 2113 in contact therewith.
In some embodiments, the second seal portion 2113 and the first seal portion 2112 are connected. In some embodiments, conductors 212 include tabs. In some embodiments, the cells 21 comprise soft pack lithium ion batteries. In some embodiments, package 211 comprises an aluminum plastic film.
Referring to fig. 2 and 9, the structural member 3 is provided with an opening 31, and the opening 31 is used for connecting the detection device 4 with the battery cell 21.
It should be noted that, on the plane where the structural member 3 is located, please refer to fig. 2, the edge of the opening 31 may be closed, or, referring to fig. 9, the edge of the opening may also be unclosed, which is not limited in the present application.
When the structural member 3 includes the circuit board 3s, the detection device 4 is connected to the circuit board 3s. When the structural member 3 includes the circuit board 3s, the structural member 3 used for connecting the detection device 4 and the battery cell 21 does not need to be additionally arranged, and the circuit board 3s is directly used, so that the battery pack 100 is compact in structure.
The circuit board 3s includes a Battery Management System (BMS). The battery management system is used for managing charging and discharging of the battery cell 21, and specifically may be used for managing charging and discharging power, charging and discharging electric quantity, and the like of the battery cell 21.
In some embodiments, the structural component 3 includes a bracket, and the accommodating portion 2111 and the bracket of the battery cell module are sequentially disposed along the third direction L3, preferably, the bracket is disposed on the side of the battery cell 21 where the conductive component 212 is disposed. The bracket is provided with an opening 31.
Preferably, in some embodiments, the structural member 3 includes a bracket and a circuit board 3s, and the accommodating portion 2111 and the bracket and the circuit board 3s are sequentially arranged along the third direction L3, and the circuit board 3s can be fixed on the bracket, and preferably, the bracket is provided with an opening 31, and the connecting member 431 is connected to the circuit board 3s after passing through the opening 31; preferably, the bracket and the circuit board 3s are both provided with openings 31, and the connecting member 431 is connected to the circuit board 3s after passing through the two openings 31.
Referring to fig. 10, the detection device 4 includes an insulating layer 41, a detection portion 42, a detection device body 43, and a connection portion 44, the detection device body 43 is connected to the circuit board 3s through a connection member 431, one end of the detection portion 42 is connected to the detection device body 43, the other end of the detection portion 42 is connected to the battery cell 21, and the other end of the detection portion 42 is used for detecting the temperature, humidity, and the like of the battery cell 21. The insulating layer 41 is formed by fixing a flowing resin around the detecting portion 42 and the detecting device body 43, wherein the insulating layer 41 covers at least a part of the detecting device body 43 and at least a part of the detecting portion 42. The connection 431 protrudes from the insulating layer 41.
In some embodiments, the detection device body 43 is at least partially wrapped with a conductive layer and at least partially wrapped with an insulating material, wherein the insulating material may be a flowable resin formed on the detection device body 43; the detecting portion 42 includes a detecting probe and a protective layer at least partially covering the detecting probe, wherein the protective layer may be an insulating material, and the protective layer at least partially covering the detecting probe protects the detecting probe.
It should be noted that the insulating material outside the detecting device body 43 may extend to the detecting portion 42, in other words, when the detecting portion 42 includes the detecting probe and the protective layer at least partially wrapping the detecting probe, the insulating material outside the detecting device body 43 may extend to the protective layer at least partially wrapping the detecting probe. In this case, the insulating material outside the detection device body 43 is the insulating layer 41.
Referring to fig. 10 and 11, in some embodiments, the insulating layer 41 includes resin, and the insulating layer 41 is fixed to the detecting device body 43 and the detecting portion 42 respectively. The insulating layer 41, the detecting device body 43 and the detecting part 42 can be fixed by glue; the resin in the insulating layer 41 may also have a thermal shrinkage performance, so that the insulating layer 41 is thermally shrunk outside the detecting device body 43 and the detecting portion 42; the insulating layer 41 may also be formed on the detecting device body 43 and the detecting portion 42 by injection molding, and the specific connection form between the insulating layer 41 and the detecting device body 43 and the detecting portion 42 is not limited in this application.
In some embodiments, the resin includes glue, and the insulation layer 41 is formed by fixing a flowing glue around the detection portion 42 and the detection device body 43.
In some embodiments, the resin includes a potting adhesive, and the insulation layer 41 is formed by fixing a flowing potting adhesive around the detection portion 42 and the detection device body 43.
In some embodiments, the insulating layer 41 is formed by fixing a flowing resin around the detecting portion 42 and the detecting device body 43 by an injection molding process.
It should be noted that, in some embodiments, the insulating layer 41 is formed by fixing the flowing resin around the detecting portion 42 and the detecting device body 43 through a low pressure injection molding process.
In some embodiments, the insulating layer 41 includes a first portion 411, a second portion 412, and a third portion 413, wherein the first portion 411, the second portion 412, and the third portion 413 are connected in sequence. The second portion 412 is disposed at the opening 31 of the structural member 3, and the first portion 411 and the third portion 413 are disposed at opposite sides of the structural member 3. Wherein the first portion 411 is disposed close to the battery cell 21, and the third portion 413 is disposed far from the battery cell 21. The detecting portion 42 is disposed on the first portion 411. The detection device body 43 is provided to the second part 412 and/or the third part 413.
As for the first portion 411, referring to fig. 5, 7 and 12, the first portion 411 of the second direction detection device 4 is disposed between the accommodating portion 2111 of the battery cell 21 and the first side wall 12 of the housing 1.
In some embodiments, the first portion 411 may be disposed between the receiving portion 2111 of the cell 21 and the first sidewall 12. In some embodiments, the first portion 411 is disposed between the first sealing portions 2112 of two adjacent battery cells 21, and the detecting portion 42 disposed on the first portion 411 of the detecting device 4 is closer to the battery cell 21, so that the temperature and the like of the battery cell 21 can be detected more accurately.
The first portion 411 may be disposed between the accommodating portion 2111 of the battery cell 21 and the first side wall 12 of the casing 1, and the first portion 411 is disposed between the second sealing portions 2113 of two adjacent battery cells 21, that is, the detecting portion 42 disposed in the first portion 411 of the detecting device 4 is close to the battery cell 21, so that the temperature and humidity of the battery cell 21 are accurately detected.
The first portion 411 may be disposed between the accommodating portion 2111 of the battery cell 21 and the first side wall 12 of the casing 1, and the first portion 411 is disposed between the second sealing portion 2113 and the first side wall 12, that is, the detecting portion 42 disposed on the first portion 411 of the detecting device 4 is far away from the battery cell 21, so that the detecting device 4 is not easily damaged.
In some embodiments, the opening 122 overlaps the second sealing portion 2113 along the second direction L2, so that the first portion 411 faces the second sealing portion 2113 after being inserted into the housing 1 from the opening 31, and thus the temperature, humidity, and the like of the battery cell 21 are detected, and the detection apparatus 4 is convenient to install. The first portion 411 includes a first surface 411s facing the battery cell 21, the first surface 411s being used for connection with the battery cell 21. Preferably, the first surface 411s and the accommodating portion 2111 are connected, such as contact connection. Preferably, the first surface 411s and the second sealing portion 2112 are connected, such as contact connection. Preferably, the first surface 411s extends out of the opening 122, which facilitates better connection between the first surface 411s and the battery cell 21. Preferably, the first surface 411s is disposed in the opening 122. Preferably, the first surface 411s and the battery cell 21 are connected by other members, such as a heat-conducting adhesive.
In some embodiments, referring to fig. 5 and fig. 6, when the thickness of the first portion 411 in the first direction L1 is relatively thin, the first portion 411 may be inserted between two adjacent battery cells 21, each adjacent battery cell 21 holds the first portion 411, and the detecting portion 42 abuts against the accommodating portion 2111 of at least one battery cell 21 of the two adjacent battery cells 21, so that the gap between the battery cells 21 and the battery cells 21 is fully utilized to provide the detecting device 4, and the battery pack 100 is compact in structure.
The second portion 412, see fig. 2 and 12, is at least partially connected to the structure 3, so as to connect the detecting device 4 to the structure 3.
In some embodiments, the third portion 412 extends to form a protruding portion 4131, the protruding portion 4131 is obtained by extending the second portion 412 and/or the third portion 413, and when the detection apparatus 4 is connected to the battery cell 21 through the opening 31, the protruding portion 4131 abuts against the structural member 3, so as to limit the detection apparatus 4 in a third direction L3, where the third direction L3 is perpendicular to the first direction L1, and the third direction L3 is perpendicular to the second direction L2.
In some embodiments, glue or the like may be filled between the protrusion 4131 and the structure 3, i.e. the protrusion 4131 is connected with the structure 3 by glue or the like. In some embodiments, the second portion 412 and the opening 31 are secured by other adhesives, such as, for example, a sealant, etc.
In some embodiments, the second portion 412 and the third portion 413 are integrally formed.
In the third portion 413, referring to fig. 12, in some embodiments, the connecting member 431 extends from the third portion 413, and the third portion 413 is located on a side of the structural member 3 away from the battery cell 21, so that when the structural member 3 includes the circuit board 3s, the connecting member 431 is conveniently wired to the circuit board 3s.
In some embodiments, the connector 431 includes a wire that connects the detection device 4 to a Battery Management System (BMS).
In some embodiments, referring to fig. 2 and 12, the detecting portion 42 abuts against a third portion of the battery cell 21 from the first sealing edge 2114, wherein the third direction L3 is perpendicular to the first direction L1, and the third direction L3 is perpendicular to the second direction L2, wherein the first sealing edge 2112 is extended from the first sealing edge 2114.
Referring to fig. 2, 7 and 12, the detecting portion 42 is located at the connecting portion 44, and the opening 122 overlaps the second sealing portion 2113 when viewed along the second direction L2. Specifically, along the second direction L2, an orthographic projection of the connection portion 44 may at least partially overlap the second sealing edge portion 2113 of the battery cell 21, which is beneficial for the detection portion 42 of the detection device 4 to detect the temperature, humidity, and the like of the battery cell 21. Specifically, in this embodiment, the first surface 411s is disposed on the connecting portion 44, and includes a side facing the battery cell, and along the second direction, the first surface 411s is located on the side of the second sealing portion 2113. Preferably, the area of the first surface 411s is smaller than the area of the second sealing edge portion 2113, so that the first surface 411s is completely connected to the second sealing edge portion 2113, which is favorable for better detecting the condition of the battery cell 21.
Referring to fig. 2 and 12, the connecting portion 44 may be formed by extending the first portion 411, the second portion 412 and the third portion 413, respectively, and the connecting portion 44 faces the accommodating cavity 11 of the housing 1. The cross-section of the insulating layer 41 along the second direction L2 is shaped as a T, which facilitates placing the detecting device 4 in the first groove 121 during manufacturing. The connecting portion 44 can pass through the opening 122 and be inserted into the accommodating cavity 11 of the housing 1, so that the detecting portion 42 of the connecting portion 44 is closer to the accommodating portion 2111 of the battery cell 21, and the temperature and humidity of the battery cell 21 can be detected more accurately.
When the insulating layer 41 has a T-shaped cross section, the detection device 4 may be inserted into the housing cavity 11 of the case 1 through the opening 31 when the detection device 4 is mounted on the battery pack 100.
The first portion 411 includes a first zone 4111 and a second zone 4112 arranged vertically, wherein the first zone 4111 and the second zone 4112 are connected, and the first zone 4111 and the second zone 4112 present an L-shape. Wherein the first region 4111 is connected with the second portion 412. The first surface is located in the second region 4112.
In some embodiments, when the detection device 4 includes the connection portion 44, the connection portion 44 is disposed on the first surface of the second region 4112
The connecting portion 44 is located between the first sealing portions 2112 of two adjacent battery cells 21, and the detecting portion 42 abuts against the first sealing portion 2112 of at least one battery cell 21 of the two adjacent battery cells 21. With this arrangement, the energy density of the battery pack 100 is high.
When the first area 4111 and the second area 4112 are L-shaped, referring to fig. 2, 13, 14 and 15, when the detecting device 4 is mounted on the battery pack 100, the detecting device 4 is inserted into the opening 31 of the structural member 3 when the opening 122 is formed on the first sidewall 12, and then the detecting device 4 is moved along the second direction L2 to pass through the opening 122, so that the detecting device 4 can be mounted on the battery pack 100 conveniently.
It should be noted that, the detection device 4 is mounted on the battery pack 100, and referring to fig. 14 and fig. 15, the detection device 4 may be connected to the accommodating portions 2111 of two adjacent battery cells 21.
It should be noted that, the detection device 4 is mounted on the battery pack 100, please refer to fig. 14 and fig. 16, and the detection device 4 may be connected to the second sealing portion 2113 of the battery cell 21.
The detection device 4 may be a temperature sensor, a humidity sensor, or the like. When the detection device 4 is a temperature detection device, the temperature detection device includes a thermistor.
In some embodiments, the battery pack 100 further includes a resin layer disposed in the receiving cavity 11, the resin layer is disposed between the battery cell 21 and the casing 1, and the resin layer is formed by fixing a flowing resin after the resin layer is disposed in the receiving cavity 11. When the detection device 4 includes the connection portion 44, the resin layer is used to connect the connection portion 44 with the battery cell 21. The resin layer may be filled into the housing cavity 11 of the case 1 after the assembly of the case 1, the battery module 2, the structural member 3, and the detection device 4 is completed, or may be filled after the battery module 2 is mounted in the housing cavity 11 of the case 1.
In the embodiment of the present invention, the battery pack 100 includes a housing 1, a battery module 2, a structure 3, and a detection device 4, the housing 1 is provided with an accommodating cavity 11, the battery module 2 and the structure 3 are accommodated in the accommodating cavity 11, the battery module 2 includes a plurality of battery cells 21, the plurality of battery cells 21 are sequentially stacked along a first direction L1, the structure 3 is electrically connected to the battery cells 21, the structure 3 is provided with an opening 31, the opening 31 is used for the detection device 4 to pass through the structure 3, and the detection device 4 is connected to the battery cells 21. Through set up opening 31 on structure 3, then when battery package 100 assembles, can install battery module 2, structure 3 in casing 1, then insert detection device 4 in accepting the chamber 11 of casing 1 through opening 31 on structure 3 to make detection device 4 be connected with electric core 21, it is very convenient.
The embodiment of the present invention further provides an embodiment of an electric device, which includes a load and the battery pack 100. The battery pack 100 is used to supply power to a load. For the specific structure and function of the battery pack 100, reference may be made to the above embodiments, and details are not repeated here.
The power consumption device can be an energy storage product, a mobile phone, a tablet computer, an unmanned aerial vehicle, a single wheel or an electric vehicle with more than two wheels, or an electric cleaning tool and the like.
For example, in the above-described drone, the battery pack 100 is mounted on the drone, and the battery pack 100 is used to supply power to loads on the drone, including a flight system, a control system, an image pickup system, and the like.
It should be noted that the preferred embodiments of the present invention are shown in the description and the drawings, but the present invention may be embodied in many different forms and is not limited to the embodiments described in the description, which are not intended as additional limitations to the present disclosure, which is provided for the purpose of providing a more thorough understanding of the present disclosure. Moreover, the above technical features are combined with each other to form various embodiments which are not listed above, and all the embodiments are regarded as the scope of the present invention described in the specification; further, modifications and variations will occur to those skilled in the art in light of the foregoing description, and it is intended to cover all such modifications and variations as fall within the true spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. A battery pack comprises a shell, a battery module and a circuit board, wherein the circuit board is connected with the shell, an accommodating cavity is formed between the circuit board and the shell, the battery module is accommodated in the accommodating cavity, the battery module comprises a plurality of battery cores, and the battery pack is characterized in that,
the circuit board is provided with an opening, the battery pack further comprises a detection device, the detection device comprises an insulating layer, a detection part and a detection device body, the detection part is connected with the battery cell, the insulating layer wraps at least part of the detection part and at least part of the detection device body, the insulating layer comprises a first part, a second part and a third part, the second part is arranged at the opening, the first part and the third part are arranged on two opposite sides of the circuit board, the detection part is arranged on the first part, the third part is far away from the battery cell, at least part of the third part is connected with the circuit board to limit the third part to penetrate through the opening, the detection device body comprises a connecting piece, the connecting piece extends out of the insulating layer from the third part, and the connecting piece is used for being electrically connected with the circuit board.
2. The battery pack according to claim 1,
the battery cell is sequentially arranged along a first direction, the battery cell comprises a packaging shell, an electrode assembly and a conductive piece, the packaging shell comprises a containing part and a first edge sealing part formed from the periphery of the containing part, one end of the conductive piece is connected with the electrode assembly, the other end of the conductive piece extends out of the packaging shell from the first edge sealing part, and the electrode assembly is arranged in the containing part;
the shell comprises a first side wall and a second side wall which are oppositely arranged along a second direction, the first side wall is provided with a first groove and an opening which is communicated with the first groove and the accommodating cavity, the first part enters the first groove from an opening of the circuit board, and the detecting part is connected to the battery cell through the opening;
the first portion is disposed between the receiving portion and the first sidewall along the second direction.
3. The battery pack of claim 2, wherein the enclosure further comprises a second bead portion extending from the receptacle, the second bead portion being disposed between the first portion and the receptacle along the second direction.
4. The battery pack according to claim 3, wherein the opening hole overlaps the second sealing edge portion as viewed in the second direction.
5. The battery pack according to claim 3, wherein the insulating layer is provided with a connecting portion facing the accommodating cavity, the detecting portion is provided on the connecting portion, and the connecting portion at least partially overlaps the second sealing portion when viewed in the second direction.
6. The battery pack according to claim 1,
the battery cell is sequentially arranged along a first direction, the battery cell comprises an encapsulation shell, an electrode assembly and a conductive piece, the encapsulation shell comprises a containing part and a first edge sealing part formed from the periphery of the containing part, one end of the conductive piece is connected with the electrode assembly, the other end of the conductive piece extends out of the encapsulation shell from the first edge sealing part, and the electrode assembly is arranged in the containing part;
the insulating layer is provided with a connecting portion facing the accommodating cavity, the detecting portion is arranged on the connecting portion, the connecting portion is located between the first edge sealing portions of the two adjacent battery cores, and the detecting portion is connected to the first edge sealing portion of at least one battery core of the two adjacent battery cores.
7. The battery pack of claim 6, further comprising a resin layer disposed in the receiving cavity, wherein the resin layer is formed by fixing a flowing resin in the receiving cavity, and the resin layer connects the connecting portion and the battery cell.
8. An electric device comprising a load and a battery pack according to any one of claims 1 to 7, the load being connected to the battery pack.
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| US10096868B2 (en) * | 2016-02-23 | 2018-10-09 | Gs Yuasa International Ltd. | Energy storage apparatus and method of manufacturing energy storage apparatus |
| CN205900645U (en) * | 2016-07-27 | 2017-01-18 | 深圳市芯华芯动力技术有限公司 | Power battery and group battery installing support thereof |
| CN110431686B (en) * | 2017-03-15 | 2023-01-31 | 株式会社杰士汤浅国际 | Electricity storage device |
| JP2018195524A (en) * | 2017-05-22 | 2018-12-06 | 矢崎総業株式会社 | Conductive module |
| JP6738857B2 (en) * | 2018-06-06 | 2020-08-12 | 矢崎総業株式会社 | Sensor protector |
| CN210516819U (en) * | 2019-11-07 | 2020-05-12 | 深圳市广力铭塑胶制品有限公司 | Sealed anti-creeping and anti-short-circuit battery frame device |
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| 锂离子动力电池模组设计浅析;徐丹等;《电源世界》;20170215(第02期);全文 * |
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