CN117254213B - Cell structure, busbar and liquid cooling battery package - Google Patents

Cell structure, busbar and liquid cooling battery package Download PDF

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Publication number
CN117254213B
CN117254213B CN202311537081.4A CN202311537081A CN117254213B CN 117254213 B CN117254213 B CN 117254213B CN 202311537081 A CN202311537081 A CN 202311537081A CN 117254213 B CN117254213 B CN 117254213B
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CN
China
Prior art keywords
supporting plate
groove
cell structure
limiting
busbar
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Active
Application number
CN202311537081.4A
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Chinese (zh)
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CN117254213A (en
Inventor
陈家鸿
杨卿鑫
刘伶
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Shanghai Juxin Haiju New Energy Technology Co ltd
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Shanghai Juxin Haiju New Energy Technology Co ltd
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Priority to CN202311537081.4A priority Critical patent/CN117254213B/en
Publication of CN117254213A publication Critical patent/CN117254213A/en
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Publication of CN117254213B publication Critical patent/CN117254213B/en
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/507—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising an arrangement of two or more busbars within a container structure, e.g. busbar modules
    • 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
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • 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
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/654—Means for temperature control structurally associated with the cells located inside the innermost case of the cells, e.g. mandrels, electrodes or electrolytes
    • 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
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
    • 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
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6567—Liquids
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/514—Methods for interconnecting adjacent batteries or cells
    • H01M50/517—Methods for interconnecting adjacent batteries or cells by fixing means, e.g. screws, rivets or bolts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M6/00—Primary cells; Manufacture thereof
    • H01M6/50—Methods or arrangements for servicing or maintenance, e.g. for maintaining operating temperature
    • H01M6/5038—Heating or cooling of cells or batteries
    • 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

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

Cell structure, busbar and liquid cooling battery package, cell structure include the body, and the body includes anodal ear and negative pole ear, anodal ear reaches negative pole ear department is equipped with coupling mechanism, coupling mechanism is used for connecting the busbar, and will the busbar clamps to on the body, so that pass through the busbar realizes a plurality of the connection of body, the busbar includes first connecting plate, second connecting plate and joint board, first connecting plate with the second connecting plate is connected along controlling the direction, seted up on the first connecting plate with coupling mechanism complex spread groove, set up on the second connecting plate with coupling mechanism complex guide slot, liquid cooling battery package, including lid and casing, the casing is including being used for holding the holding chamber of foretell cell structure, hold the intracavity and be equipped with isolator and cooling piece, promoted the quality of connection of busbar and cell structure, simple structure has promoted the security.

Description

Cell structure, busbar and liquid cooling battery package
Technical Field
The invention relates to the technical field of new energy, in particular to a battery cell structure, a busbar and a liquid cooling battery pack.
Background
In the prior art, a plurality of battery cells are generally connected in series or in parallel to form a battery module with larger capacity so as to meet the requirements of different electric capacities. When the battery cells are connected, the electrode lugs of two adjacent battery cells are welded and connected by adopting a busbar, and the mode has good connection strength, but defects such as false welding and missing welding are easy to generate in the welding process, and the defects can lead to the off-welding of the battery pack when the battery pack is used, cause short circuit and even affect the use safety of the battery pack.
In addition, the battery pack can generate heat when in use, especially the heat generated at the lug of the battery core can be higher than the heat generated at other parts of the battery core, and when the lug is connected with the bus bar, the temperature at the bus bar can be higher, so that the service life and the use safety of the battery pack are influenced.
Disclosure of Invention
Therefore, the invention aims to provide a battery cell structure, a busbar and a liquid cooling battery pack, so that the safety of the battery cell and the liquid cooling battery is improved, and the service life of the battery cell is prolonged.
The invention provides a battery cell structure, which comprises a body, wherein the body comprises a positive electrode lug and a negative electrode lug, a connecting mechanism is arranged at the positive electrode lug and the negative electrode lug and used for connecting a bus bar, the bus bar is clamped on the body so as to realize the connection of a plurality of bodies through the bus bar, the connecting mechanism comprises a base and a fixing component, the base is used for being connected with the positive electrode lug or the negative electrode lug of the body, the base comprises a fixing groove used for installing the bus bar, the fixing component is movably arranged in the fixing groove, and the fixing component can generate elastic activity in the fixing groove.
The base comprises a first supporting plate, a second supporting plate and a connecting plate, wherein the first supporting plate and the second supporting plate are distributed in parallel along the upper and lower directions, the connecting plate is used for connecting the first supporting plate and the second supporting plate, the second supporting plate is used for connecting the positive electrode lug or the negative electrode lug, the first supporting plate, the second supporting plate and the connecting plate are matched to form the fixing groove, and the fixing assembly is movably connected with at least one of the first supporting plate and the second supporting plate.
The fixing component comprises a limiting strip and an elastic piece, wherein the limiting strip is movably arranged on one of the first supporting plate and the second supporting plate through the elastic piece, and the limiting strip can move along the up-down direction so as to change the original height dimension of the fixing groove.
Illustratively, the fixing assembly further includes a guide member, one of the first and second support plates is provided with a limit groove for accommodating the limit bar and the elastic member, the guide member penetrates into the limit groove to connect the limit bar and one of the first and second support plates, and the guide member is configured to enable the limit bar to move in an up-down direction.
The first support plate and the second support plate are provided with positioning holes matched with the guide members, the positioning holes are communicated with the limiting grooves and penetrate through the groove walls of the limiting grooves in the left-right direction, the limiting strips are provided with guide holes, the radial dimension of each guide hole in the up-down direction is larger than the radial dimension of each positioning hole in the up-down direction, and the guide members are arranged in the guide holes and the positioning holes.
The first support plate and the second support plate are provided with a positioning hole matched with the guide piece and a clamping groove matched with the elastic piece, the positioning hole is formed in the vertical direction and communicated with the clamping groove, one side, close to the elastic piece, of the limiting strip is provided with a guide hole matched with the guide piece, one end of the guide piece is arranged in the guide hole, and the other end of the guide piece penetrates through the elastic piece and is arranged in the positioning hole.
The invention provides a busbar which is used for connecting at least two cell structures and is connected with a connecting mechanism, and comprises a first connecting plate, a second connecting plate and a clamping plate, wherein the first connecting plate and the second connecting plate are connected in the left-right direction, a connecting groove matched with the connecting mechanism is formed in the first connecting plate, a guide groove matched with the connecting mechanism is formed in the second connecting plate, the guide groove penetrates through one end, far away from the first connecting plate, of the second connecting plate in the left-right direction, the clamping plate is positioned above the connecting groove and a notch of the guide groove, and the length of the connecting groove is larger than that of the guide groove.
The invention also provides a liquid cooling battery pack, which comprises a cover body and a shell, wherein the shell comprises a containing cavity for containing the battery cell structure, a separator and a cooling piece are arranged in the containing cavity, the separator is used for installing the bus bar, and the bus bar is used for connecting the battery cell structure.
The battery cell structure comprises a shell, a cover body, a battery cell structure and a battery cell, wherein the battery cell structure is arranged in the shell, the battery cell structure is arranged in the battery cell structure, and the battery cell structure is characterized in that a plurality of protruding ribs are arranged on one side of the cover body, which is close to the shell, and surround to form a limiting cavity, and the limiting cavity is matched with the battery cell structure to form a gap between the side surface of the body and the side wall of the containing cavity.
The first limiting ribs are arranged on one side, away from the cooling piece, of the isolating piece in a protruding mode, limiting areas matched with the outlines of the battery cell structures and with one side being open are formed in the first limiting ribs in a surrounding mode, and the open sides of the limiting areas are matched with the guide grooves of the bus bars.
According to the battery cell structure provided by the invention, the connecting mechanism is arranged at the positive electrode lug and the negative electrode lug, the bus bar is clamped on the body by utilizing the connecting mechanism, so that a plurality of bodies can be connected in series or in parallel, and compared with a welding bus bar, the connecting mode of the connecting mechanism can prevent the bus bar from being connected with the positive electrode lug or the negative electrode lug of the body in place, so that the problem of short circuit is avoided, the connecting quality is improved, and the production quality of a battery module and a battery pack formed by a plurality of bodies is further ensured.
The busbar provided by the invention has a simple structure, can be matched with the connecting mechanism, realizes series connection or parallel connection of a plurality of battery cell structures, is convenient to assemble, and has good stability.
The liquid cooling battery pack provided by the invention has a good cooling effect on the positive electrode lug and the negative electrode lug of the battery cell structure, so that the heat generation of the battery cell structure is reduced, the use safety is improved, the battery pack is ensured to have good quality, and the service life of the battery pack is prolonged.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of the overall structure of a battery cell body according to an embodiment of the invention.
Fig. 2 is an exploded view of a connecting mechanism according to an embodiment of the present invention.
Fig. 3 is a cross-sectional view of a connection mechanism according to another embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a connection between a battery cell and a bus bar according to an embodiment of the invention.
FIG. 5 is a schematic diagram of a bus bar according to an embodiment of the invention.
Fig. 6 is a cross-sectional view of a cell and buss bar connection according to an embodiment of the present invention.
Fig. 7 is an exploded view of a liquid-cooled battery pack according to an embodiment of the present invention.
Fig. 8 is an exploded view of another angle of a liquid-cooled battery pack according to an embodiment of the present invention.
Fig. 9 is another schematic structural view of a housing according to an embodiment of the invention.
Fig. 10 is a schematic structural view of a spacer according to an embodiment of the present invention.
In the figure:
10-a body; 101-a first cell; 102-a second cell; 11-positive electrode lugs; 12-negative electrode ear;
20-a connection mechanism; 21-a base; 210-a fixed slot; 211-a first pallet; 2111-epitaxial structure; 212-a second pallet; 213-connecting plates; 214-a limit groove; 215-a clamping groove; 216-positioning holes; 22-a fixed assembly; 221-a limit bar; 2211—a pilot hole; 2212—a guide surface; 222-an elastic member; 223-guide;
30-bus bars; 31-a first connection plate; 311-connecting grooves; 32-a second connection plate; 321-a guide groove; 33-a clamping plate;
40-cover body; 41-a limiting cavity; 42-convex ribs;
50-a housing; 51-a receiving chamber; 52-avoiding holes; 53-side wall;
60-spacers; 61-grooves; 62-a first limit rib; 63-second limit ribs;
70-cooling element; 71-a liquid inlet port; 72-drain port.
Detailed Description
Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art without making any inventive effort, are intended to be within the scope of the present invention.
In the description of the present invention, unless explicitly stated and limited otherwise, the terms "disposed," "mounted," "connected," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the terms described above will be understood to those of ordinary skill in the art in a specific context.
The terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," and the like are used as references to orientations or positional relationships based on the orientation or positional relationships shown in the drawings, or the orientation or positional relationships in which the inventive product is conventionally disposed in use, merely for convenience of description and simplicity of description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore are not to be construed as limiting the invention.
The terms "first," "second," "third," and the like, are merely used for distinguishing between similar elements and not necessarily for indicating or implying a relative importance or order.
The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a list of elements does not include only those elements but may include other elements not expressly listed.
In order to facilitate understanding of the technical scheme of the present invention, as shown in fig. 1, the position relationship and the connection relationship between the components define an X-axis direction as a left-right direction, an arrow direction as a right direction, and a Y-axis direction as a front-back direction, wherein the arrow direction as a back direction, and a Z-axis direction as an up-down direction, wherein the arrow direction is an up direction, and the X-axis, the Y-axis and the Z-axis are perpendicular to each other.
As shown in fig. 1, the battery cell structure provided by the invention comprises a body 10, wherein the body 10 comprises a positive electrode lug 11 and a negative electrode lug 12, a connecting mechanism 20 is arranged at the positive electrode lug 11 and the negative electrode lug 12, and in combination with fig. 4, the connecting mechanism 20 is used for connecting a bus bar 30, and the bus bar 30 is connected with the positive electrode lug 11 or the negative electrode lug 12 in a clamping manner, the bus bar 30 is clamped on the body 10, so that a plurality of bodies 10 are connected in series or in parallel, further a battery module with larger capacitance is formed, and the bus bar 30 is connected through the connecting mechanism 20.
It can be understood that, as shown in fig. 1, the front end face and the rear end face of the body 10 are two faces with larger areas among the four sides of the cell structure, the left end face and the right end face of the body 10 are two faces with smaller areas among the four sides of the cell structure, the top face and the bottom face of the body 10 are two faces connected with the sides, and the positive electrode tab 11 and the negative electrode tab 12 are located on the top face of the body 10.
In an example, the positive tab 11 and the negative tab 12 are provided with mounting grooves, the mounting grooves are matched with the lower ends of the connecting mechanisms 20, and when the connecting mechanisms 20 are connected with the body 10, the lower ends of the connecting mechanisms 20 are accommodated in the mounting grooves, so that the connecting mechanisms 20 and the body 10 can be quickly positioned and connected.
Illustratively, the attachment mechanism 20 is disposed within the mounting groove by welding or crimping.
Illustratively, the mounting groove has a groove depth of less than or equal to 1mm.
As shown in fig. 2, the connection mechanism 20 includes a base 21 and a fixing component 22, the base 21 is used for being connected with the positive electrode tab 11 or the negative electrode tab 12 of the body 10, the base 21 includes a fixing groove 210, the fixing groove 210 is used for installing the busbar 30, the fixing component 22 is located on the base 21 and is movably arranged in the fixing groove 210, through the movable arrangement of the fixing component 22, the height dimension of the fixing groove 210 in the up-down direction can be changed, and then the available accommodating space of the fixing groove 210 is changed, the fixing component 22 is matched with the base 21, so that the body 10 and the busbar 30 are clamped, and the busbar 30 is clamped in the fixing groove 210.
As shown in fig. 2, the base 21 includes a first supporting plate 211, a second supporting plate 212, and a connecting plate 213 for connecting the first supporting plate 211 and the second supporting plate 212, where the first supporting plate 211 and the second supporting plate 212 are arranged in parallel and distributed along an up-down direction, the second supporting plate 212 is used to connect with the positive tab 11 or the negative tab 12, the first supporting plate 211 and the second supporting plate 212 form the above-mentioned fixing slot 210, the fixing slot 210 is an open cavity structure with front end and left and right ends open, and the fixing component 22 is located in the fixing slot 210 and is movably connected with at least one of the first supporting plate 211 and the second supporting plate 212.
It will be appreciated that when the fixing assembly 22 is provided as one, it may be movably connected to the first pallet 211 or the second pallet 212, and when the fixing assembly 22 is provided as two or more, it may be movably connected to only the first pallet 211, or only the second pallet 212, or at least one of them may be movably connected to the first pallet 211 and the rest may be movably connected to the second pallet 212.
For ease of understanding, an initial height dimension of the fixing groove 210, that is, a vertical distance between the lower end surface of the first supporting plate 211 and the upper end surface of the second supporting plate 212 is defined as an initial height dimension, the fixing assembly 22 has a functional position, and after the bus bar 30 is connected, a position of the fixing assembly 22 in the fixing groove 210 is defined as a functional position, and when the fixing assembly 22 is in the functional position, the height dimension of the fixing groove 210 at a position where the fixing assembly 22 is disposed is smaller than the initial height dimension thereof, so that the bus bar 30 can be clamped in the fixing groove 210 through the fixing assembly 22.
Illustratively, the connection plate 213 is vertically connected to the first and second pallets 211 and 212.
Illustratively, the connecting plate 213 is integrally formed with the first and second brackets 211, 212.
As shown in fig. 2, the width dimension of the first supporting plate 211 in the front-rear direction is larger than the width dimension of the second supporting plate 212 in the front-rear direction, so that the first supporting plate 211 protrudes forward relative to the second supporting plate 212 to form an extension structure 2111, the fixing component 22 can be arranged on the extension structure 2111, the fixing component 22 can be prevented from influencing the width dimension of the fixing groove 210 by the arrangement of the extension structure 2111, the first supporting plate 211 and the bus bar 30 have enough contact area to play a good connection role of the bus bar 30, and the fixing effect of the bus bar 30 in the front-rear direction is ensured.
The width dimension of the second supporting plate 212 in the front-rear direction is larger than the width dimension of the first supporting plate 211 in the front-rear direction, so that the second supporting plate 212 protrudes forward relative to the first supporting plate 211 to form a convex portion, the second supporting plate 212 and the positive electrode tab 11 or the negative electrode tab 12 have enough contact area and connection area through the arrangement of the convex portion, the fixing component 22 can be arranged on the convex portion, the fixing component 22 can be prevented from influencing the width dimension of the fixing groove 210 through the arrangement of the convex portion, the second supporting plate 212 and the busbar 30 have enough contact area, the good connection function of the busbar 30 is achieved, and the fixing effect of the busbar 30 in the front-rear direction is ensured.
In one example of the present embodiment, as shown in fig. 2, the fixing assembly 22 includes a limiting bar 221 and an elastic member 222, the elastic member 222 is capable of elastically deforming in an up-down direction, the limiting bar 221 is movably disposed at a lower end of the first supporting plate 211 and/or disposed at an upper end of the second supporting plate 212 by the elastic member 222, the limiting bar 221 is capable of moving in the up-down direction to change an original height dimension of the fixing groove 210, when the bus bar 30 is connected to the fixing assembly 22, the bus bar 30 can press the limiting bar 221 to move in the up-down direction, and the height of the fixing groove 210 is adjusted to a proper dimension so that the bus bar 30 can enter the fixing groove 210, and at this time, the limiting bar 221 is in a functional position, and the bus bar 30 can be clamped in the fixing groove 210 in the up-down direction.
The elastic member 222 is provided as a spring, may be provided as a cylindrical spring, or as a variable diameter spring, for example.
For example, referring to fig. 2, at least one of the first and second pallets 211 and 212 is provided with a limiting groove 214, the limiting groove 214 is in communication with the fixing groove 210, the limiting groove 214 is used for accommodating a limiting bar 221 and an elastic member 222, one end of the elastic member 222 is connected with a groove bottom of the limiting groove 214, the other end is connected with a lower end of the limiting bar 221, the elastic member 222 can generate deformation in an up-down direction in the limiting groove 214 so as to enable the limiting bar 221 to lift in the limiting groove 214, and the elastic member 222 and the limiting bar 221 are configured such that when the elastic member 222 is in a free length, a lower end surface of the limiting bar 221 protrudes out of the limiting groove 214.
Exemplary, referring to fig. 2, the slot bottom of the limiting slot 214 is provided with a slot 215, the contour of the slot 215 is matched with the outermost contour of the elastic member 222, the lower portion of the elastic member 222 is accommodated in the slot 215, and the connection stability of the elastic member 222 can be improved through the arrangement of the slot 215, so that the stability of the elastic member 222 in the elastic deformation process is ensured, further, the shaking of the limiting bar 221 in the up-down movement process is reduced, and the stability of the limiting bar 221 is improved.
As shown in fig. 3, a second clamping groove matched with the elastic member 222 is formed on one side of the limiting bar 221 near the elastic member 222, the second clamping groove is used for positioning and connecting the elastic member 222, and the second clamping groove and the clamping groove 215 are matched to enable the elastic member 222 to be installed stably.
As shown in fig. 2, the fixing assembly 22 further includes a guide 223, the guide 223 is disposed in the limiting groove 214, and the guide 223 is configured to enable the limiting bar 221 to move in the up-down direction without being offset in the front-back and/or left-right directions.
In an example, as shown in fig. 2, the guide member 223 is configured as a shaft-shaped member, at least one of the first supporting plate 211 and the second supporting plate 212 is provided with a positioning hole 216, the positioning hole 216 is communicated with the limiting groove 214, the positioning hole 216 penetrates through the groove wall of the limiting groove 214 along the left-right direction, the aperture of the positioning hole 216 is matched with the outermost contour of the guide member 223, more specifically, the positioning hole 216 is matched with the orthographic projection of the guide member 223 along the left-right direction, the limiting bar 221 is provided with a guiding hole 2211 matched with the positioning hole 216, the radial dimension of the guiding hole 2211 in the up-down direction is larger than the radial dimension of the positioning hole 216 along the up-down direction, the radial dimension of the guiding hole 2211 is matched with the guide member 223, the guiding member 223 is arranged in the positioning hole 216 and the guiding hole 2211, the two ends of the guiding member 223 are arranged in the positioning hole 216, the guiding hole 2211 is arranged, the guiding member 223 can have a space moving along the up-down direction in the guiding hole 2211, when the limiting bar 221 moves under the action of the elastic member 222, the position of the guiding member 216 can not move along the guiding hole 2211, and can not move along the guiding hole 221 stably along the up-down direction.
Illustratively, the pilot bore 2211 is configured as a kidney-shaped bore.
In an example, the height dimension of the limiting bar 221 in the up-down direction gradually increases from the side far from the connecting plate 213 to the side close to the connecting plate 213, so that the limiting bar 221 forms a guiding surface 2212, the guiding surface 2212 is obliquely arranged, more specifically, when the fixing component 22 is arranged on the first supporting plate 211, the lower surface of the limiting bar 221 gradually extends downwards from front to back; when the fixing component 22 is disposed on the second supporting plate 212, the upper surface of the limiting bar 221 gradually extends from front to back in an upward slope, so that the fixing component 22 and the bus bar 30 can be conveniently connected by the guiding function of the guiding surface 2212 and the bus bar 30 entering the fixing groove 210 through the limiting bar 221.
In another example of the present embodiment, as shown in fig. 3, the setting positions and the connection manners of the limiting bar 221, the elastic member 222, the guiding member 223 and the positioning hole 216 are different from those of the previous example, in this example, the elastic member 222 and the guiding member 223 extend along the up-down direction, the guiding member 223 is penetrated in the elastic member 222, one end of the guiding member 223 is connected with the limiting bar 221, the guiding member 223 can move along the up-down direction under the action of the elastic member 222, and further the limiting bar 221 is driven to move along the up-down direction, at least one of the first supporting plate 211 and the second supporting plate 212 is provided with the positioning hole 216 matched with the guiding member 223 and the clamping groove 215 matched with the elastic member 222, the clamping groove 215 and the positioning hole 216 are both opened along the up-down direction, the clamping groove 215 is communicated with the positioning hole 216, the limiting bar 221 is provided with the guiding hole 2211 matched with the guiding member 223 at one side close to the elastic member 222, one end of the guiding member 223 is installed in the guiding hole 2211, and the other end of the guiding member 223 is installed in the positioning hole 216 through the elastic member 222.
Illustratively, one end of the guide 223 is fixedly connected to the stop bar 221 through a guide hole 2211.
In an example, as shown in fig. 3, the aperture size of the positioning hole 216 is larger than the aperture size of the clamping groove 215, the guide member 223 includes a limiting section matched with the positioning hole 216, and a connecting section penetrating through the elastic member 222, the radial size of the limiting section is larger than the radial size of the connecting section, the guide member 223 is movably disposed in the positioning hole 216, and illustratively, the height size of the positioning hole 216 in the up-down direction is larger than the height size of the connecting section in the up-down direction.
As shown in fig. 5, the present invention further provides a bus bar for connecting the above at least two electrical core structures, where the bus bar 30 includes a first connection plate 31, a second connection plate 32, and a clamping plate 33, the connection directions of the first connection plate 31 and the second connection plate 32 are matched with the positions of the positive tab 11 and the negative tab 12 of the main body 10, that is, the first connection plate 31 and the second connection plate 32 are connected in the left-right direction, the first connection plate 31 is provided with a connection slot 311, the connection slot 311 extends in the left-right direction, the second connection plate 32 is provided with a guide slot 321, the guide slot 321 extends in the left-right direction, and the guide slot 321 penetrates through one end of the second connection plate 32 far from the first connection plate 31 in the left-right direction, the length dimension of the connection slot 311 in the left-right direction is greater than the length dimension of the guide slot 321 in the left-right direction, the clamping plate 33 is matched with the original height dimension of the fixing slot 210, and the clamping plate 33 is located above the notches of the connection slot 311 and the guide slot 321, and is connected with the first connection plate 31 and the second connection plate 32.
Illustratively, the length of the connecting slot 311 and the guiding slot 321 along the left-right direction is greater than the length of the first supporting plate 211 or the second supporting plate 212 along the left-right direction.
The first connection plate 31 and the second connection plate 32 are made of conductive materials.
Illustratively, the first connection plate 31, the second connection plate 32, and the clip plate 33 are integrally formed.
As shown in fig. 6, when the bus bar 30 is connected to the main body 10, taking the fixing component 22 disposed on the first supporting plate 211 as an example, when two main bodies 10 are connected by the bus bar 30, for convenience of understanding, referring to fig. 4, one of the main bodies is defined as a first electric core 101, the other is defined as a second electric core 102, and the rear end face of the first electric core 101 contacts with the front end face of the second electric core 102, at this time, the connection mechanisms 20 of the first electric core 101 and the second electric core 102 are disposed in the same direction, that is, the front end openings of the fixing slots 210 are in the same direction;
the bus bar 30 is aligned to the connection mechanism 20 of the first electric core 101 and the second electric core 102, the connection mechanism 20 of the first electric core 101 is located at one end, far away from the clamping plate 33, of the connection groove 311, the connection mechanism 20 of the second electric core 102 is located at one end, far away from the clamping plate 33, of the guide groove 321, then the bus bar 30 is pushed, the connection mechanism 20 gradually approaches the clamping plate 33 until the end of the connection mechanism 20 of the first electric core 101 contacts with the groove wall of one side, far away from the guide groove 321, of the connection groove 311, the clamping plate 33 is clamped in the fixing groove 210, and in the process, the limiting bar 221 can firmly clamp the clamping plate 33 in the fixing groove 210 through the action of the elastic piece 222, so that the clamping connection between the first electric core 101 and the second electric core 102 and the bus bar 30 is realized.
As shown in fig. 7, the present invention further provides a liquid cooling battery pack, which includes a cover 40 and a housing 50, wherein the housing 50 includes a housing cavity 51, the housing cavity 51 is used for housing a plurality of the above-mentioned battery cell structures, and the plurality of battery cell structures are connected in series or in parallel in the housing cavity 51 through the above-mentioned bus bars 30, so that the whole battery pack main body has sufficient capacitance, and the number of the battery cell structures can be adjusted, so that the battery pack main body is suitable for occasions with different power requirements, thereby improving flexibility and applicability of the battery pack main body.
The accommodating cavity 51 is internally provided with a spacer 60 and a cooling piece 70, the cooling piece 70 is arranged at the bottom of the accommodating cavity 51, the spacer 60 is arranged above the cooling piece 70, the spacer 60 is used for installing the bus bar 30, the positive lug 11 and the negative lug 12 of the body 10 are connected with the bus bar 30, the positive lug 11 and the negative lug 12 of the body 10 face downwards and are inversely arranged in the accommodating cavity 51, and the cover body 40 is packaged above the shell 50 to form a complete liquid cooling battery pack.
Illustratively, the side walls of the receiving chamber 51 are sprayed with an insulating paint or attached with an insulating sheet to provide insulating isolation of the housing 50 and the body 10.
As shown in fig. 8, a limiting cavity 41 is disposed on one side of the cover 40, which is close to the housing 50, the limiting cavity 41 is formed by surrounding ribs 42 protruding from the cover 40, the limiting cavity 41 is matched with a plurality of battery core structures, and the side surface of the body 10 is not contacted with the side wall of the accommodating cavity 51 through the arrangement of the limiting cavity 41, so that a gap is reserved between the side surface of the body 10 and the accommodating cavity 51, and a good insulating effect is achieved.
Illustratively, there are two spacing cavities 41 for accommodating two rows of cell structures.
Illustratively, the bead 42 is integrally formed with the cover 40.
In another embodiment of the present embodiment, as shown in fig. 9, the housing 50 further includes a side wall 53, the side wall 53 includes a cavity with openings at upper and lower ends, the cavity is matched with a plurality of cell structures, the side wall 53 is wrapped on the sides of the plurality of cell structures, when the cell structures are installed in the accommodating cavity 51, the side wall 53 can prevent the body 10 from contacting with the side wall of the accommodating cavity 51, so as to play an insulating role, and exemplary side wall 53 is made of an insulating material.
Referring to fig. 7 and 10, the spacer 60 is a plate-shaped member, a groove 61 for accommodating the bus bar 30 is formed at a side of the spacer 60 away from the cooling member 70, the bus bar 30 is mounted in the groove 61, and illustratively, a heat conductive adhesive is disposed in the groove 61, and the bus bar 30 is fixed in the groove 61 by the heat conductive adhesive.
Exemplary, the insulating heat conducting material is adopted for the spacer 60, so that the heat conducting efficiency can be improved, the heat exchanging efficiency of the positive electrode lug 11 and the negative electrode lug 12 of the body 10 and the cooling piece 70 is improved, and the stability and the safety of the body 10 during working are improved.
The spacer 60 is provided with a plurality of first spacing ribs 62 protruding from one side of the spacer 60 away from the cooling member 70, the first spacing ribs 62 are three and connected end to end, so as to form a spacing area with one side opening matched with the top surface contour of the body 10, the spacing area is in a shape of , the opening side is matched with the guide slot 321 of the busbar 30 penetrating through one side of the second connecting plate 32, and the first spacing ribs 62 are used for limiting the position of the cell structure, so as to realize quick positioning of the body 10 and improve the assembly efficiency.
Illustratively, the first stop bead 62 is integrally formed with the spacer 60.
The spacer 60 is provided with a plurality of second spacing ribs 63 protruding from one side of the spacer 60 away from the cooling element 70, the second spacing ribs 63 are located at the middle position of the spacer 60, the second spacing ribs 63 are used for spacing two rows of cell structures, and the first spacing ribs 62 are matched with the second spacing ribs 63 for limiting the position of the cell structure and preventing the cell structure from moving left and right, so that the cell structure is stably installed.
Illustratively, the second stop rib 63 is integrally formed with the spacer 60.
Illustratively, the spacer 60 is connected to the cooling member 70 by a thermally conductive adhesive.
Referring to fig. 7 and 8, the cooling member 70 is configured as a cooling plate, and includes a flow channel for circulating a cooling medium, the cooling member 70 includes a liquid inlet port 71 and a liquid outlet port 72, the liquid inlet port 71 and the liquid outlet port 72 are communicated with the flow channel and are used for connecting an external medium pipe, an avoidance hole 52 matched with the liquid inlet port 71 and the liquid outlet port 72 is formed in the housing 50, and the avoidance hole 52 is communicated with the accommodating cavity 51, so that the liquid inlet port 71 and the liquid outlet port 72 extend out from the avoidance hole 52 and are connected with the external medium pipe.
Illustratively, the cooling member 70 may be integrally formed with the housing 50, or the cooling member 70 may be provided as a bottom portion of the housing 50.
In summary, in the battery cell structure provided by the invention, the connection mechanism 20 is arranged at the positive electrode tab 11 and the negative electrode tab 12, and the bus bar 30 is clamped to the body 10 by using the connection mechanism 20, so that the series connection or parallel connection between a plurality of bodies 10 can be realized, and compared with the welding of the bus bar 30, the clamping connection mode of the connection mechanism 20 can prevent the bus bar 30 from being connected with the positive electrode tab 11 or the negative electrode tab 12 of the body 10 in place, thereby avoiding the short circuit problem, improving the connection quality, and further ensuring the production quality of the battery module and the battery pack formed by a plurality of bodies 10.
The busbar provided by the invention has a simple structure, can be matched with the connecting mechanism 20, realizes series connection or parallel connection of a plurality of cell structures, is convenient to assemble, and has good stability.
The liquid cooling battery pack provided by the invention can play a good role in cooling the positive electrode lug 11 and the negative electrode lug 12 of the battery cell structure, so that the heat generation of the battery cell structure is reduced, the use safety is improved, the battery pack is ensured to have good quality, and the service life of the battery pack is prolonged.
It should be noted that, in the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described as different from other embodiments, and identical and similar parts between the embodiments are all enough to be referred to each other.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present invention should be included in the present invention. Accordingly, the scope of the invention should be assessed as that of the appended claims.

Claims (10)

1. The utility model provides a electricity core structure which characterized in that: including body (10), body (10) include anodal ear (11) and negative pole ear (12), anodal ear (11) reaches negative pole ear (12) department is equipped with coupling mechanism (20), coupling mechanism (20) are used for connecting busbar (30), and will busbar (30) cartridge to on body (10), so as to pass through busbar (30) realize a plurality of connection of body (10), coupling mechanism (20) include base (21) and fixed subassembly (22), base (21) be used for with anodal ear (11) or negative pole ear (12) of body (10) are connected, base (21) including being used for installing fixed slot (210) of busbar (30), fixed subassembly (22) movable set up in fixed slot (210), just fixed subassembly (22) can produce the elasticity volume in fixed slot (210), with busbar (30) are located fixed subassembly (22) can be used for producing in fixed slot (210) can be followed fixed slot (210) the expansion joint.
2. The cell structure of claim 1, wherein: the base (21) comprises a first supporting plate (211), a second supporting plate (212) and a connecting plate (213), wherein the first supporting plate (211) and the second supporting plate (212) are distributed in parallel along the upper and lower directions, the connecting plate (213) is used for connecting the first supporting plate (211) and the second supporting plate (212), the second supporting plate (212) is used for connecting the positive electrode lug (11) or the negative electrode lug (12), the first supporting plate (211), the second supporting plate (212) and the connecting plate (213) are matched to form the fixing groove (210), and the fixing component (22) is movably connected with at least one of the first supporting plate (211) and the second supporting plate (212).
3. The cell structure of claim 2, wherein: the fixing assembly (22) comprises a limit bar (221) and an elastic piece (222), the limit bar (221) is movably arranged on one of the first supporting plate (211) and the second supporting plate (212) through the elastic piece (222), and the limit bar (221) can move along the up-down direction so as to change the original height size of the fixing groove (210).
4. A cell structure according to claim 3, wherein: the fixing assembly (22) further comprises a guide piece (223), one of the first supporting plate (211) and the second supporting plate (212) is provided with a limiting groove (214) for accommodating the limiting strip (221) and the elastic piece (222), the guide piece (223) penetrates into the limiting groove (214) to be connected with the limiting strip (221) and the one of the first supporting plate (211) and the second supporting plate (212), and the guide piece (223) is configured to enable the limiting strip (221) to move along the up-down direction.
5. The cell structure of claim 4, wherein: the utility model discloses a locating device for the automobile, including first layer board (211) and second layer board (212), first layer board (211) and second layer board (212) are gone up seted up with guiding element (223) complex locating hole (216), locating hole (216) with spacing groove (214) intercommunication, and along left and right directions run through the cell wall of spacing groove (214), guiding hole (2211) have been seted up on spacing (221), guiding hole (2211) are greater than in the radial dimension of upper and lower direction of locating hole (216) in the radial dimension of upper and lower direction, guiding element (223) install in guiding hole (2211) and in locating hole (216).
6. The cell structure of claim 4, wherein: the utility model discloses a locating device for the automobile, including first layer board (211) and second layer board (212), set up on one of them with guiding element (223) complex locating hole (216), and with elastic component (222) complex draw-in groove (215), locating hole (216) are seted up along upper and lower direction, and with draw-in groove (215) intercommunication, spacing (221) be close to one side of elastic component (222) seted up with guiding element (223) complex guiding hole (2211), one end of guiding element (223) install in guiding hole (2211), the other end pass elastic component (222) install in locating hole (216).
7. A bus bar, characterized by: the battery cell structure for connecting at least two battery cell structures according to any one of claims 1 to 6, and connected with the connecting mechanism (20), the battery cell structure comprises a first connecting plate (31), a second connecting plate (32) and a clamping plate (33), wherein the first connecting plate (31) and the second connecting plate (32) are connected in the left-right direction, a connecting groove (311) matched with the connecting mechanism (20) is formed in the first connecting plate (31), a guide groove (321) matched with the connecting mechanism (20) is formed in the second connecting plate (32), the guide groove (321) penetrates through one end, far away from the first connecting plate (31), of the second connecting plate (32) in the left-right direction, the clamping plate (33) is located above the connecting groove (311) and a notch of the guide groove (321), and the length size of the connecting groove (311) is larger than that of the guide groove (321).
8. A liquid-cooled battery pack, characterized in that: the battery cell structure comprises a cover body (40) and a shell body (50), wherein the shell body (50) comprises a containing cavity (51) for containing the battery cell structure according to any one of claims 1 to 6, a spacer (60) and a cooling piece (70) are arranged in the containing cavity (51), the spacer (60) is used for installing the bus bar (30) according to claim 7, and the bus bar (30) is used for connecting the battery cell structure.
9. The liquid-cooled battery pack of claim 8, wherein: the cover body (40) is close to one side of the shell body (50) and is convexly provided with a plurality of protruding ribs (42), a limiting cavity (41) is formed by surrounding the protruding ribs (42), and the limiting cavity (41) is matched with a plurality of battery cell structures and is used for enabling gaps to be formed between the side face of the body (10) and the side wall of the accommodating cavity (51).
10. The liquid-cooled battery pack of claim 8, wherein: one side of the isolating piece (60) away from the cooling piece (70) is convexly provided with a first limiting rib (62), the first limiting rib (62) encloses a limiting area matched with a plurality of contours of the battery cell structure and provided with one side, and the opening side of the limiting area is matched with a guide groove (321) of the busbar (30).
CN202311537081.4A 2023-11-17 2023-11-17 Cell structure, busbar and liquid cooling battery package Active CN117254213B (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN206194821U (en) * 2016-11-15 2017-05-24 浙江超威创元实业有限公司 Power battery's packaging structure
CN209217052U (en) * 2018-12-07 2019-08-06 北京国能电池科技股份有限公司 Busbar connector support plate and battery modules
CN110233229A (en) * 2019-06-06 2019-09-13 宁波利维能储能***有限公司 A kind of connection structure and battery modules of soft package battery module and busbar connector assembly
CN114709547A (en) * 2022-01-27 2022-07-05 浙江锋锂新能源科技有限公司 Lithium metal negative electrode solid-state battery module
CN217035895U (en) * 2022-01-12 2022-07-22 恒大新能源技术(深圳)有限公司 Utmost point ear connection structure and battery
CN219759841U (en) * 2023-04-04 2023-09-26 湖北美赛尔科技有限公司 Soft package module

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN206194821U (en) * 2016-11-15 2017-05-24 浙江超威创元实业有限公司 Power battery's packaging structure
CN209217052U (en) * 2018-12-07 2019-08-06 北京国能电池科技股份有限公司 Busbar connector support plate and battery modules
CN110233229A (en) * 2019-06-06 2019-09-13 宁波利维能储能***有限公司 A kind of connection structure and battery modules of soft package battery module and busbar connector assembly
CN217035895U (en) * 2022-01-12 2022-07-22 恒大新能源技术(深圳)有限公司 Utmost point ear connection structure and battery
CN114709547A (en) * 2022-01-27 2022-07-05 浙江锋锂新能源科技有限公司 Lithium metal negative electrode solid-state battery module
CN219759841U (en) * 2023-04-04 2023-09-26 湖北美赛尔科技有限公司 Soft package module

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