WO2023093615A1 - 电芯单元、电池及车辆 - Google Patents

电芯单元、电池及车辆 Download PDF

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Publication number
WO2023093615A1
WO2023093615A1 PCT/CN2022/132611 CN2022132611W WO2023093615A1 WO 2023093615 A1 WO2023093615 A1 WO 2023093615A1 CN 2022132611 W CN2022132611 W CN 2022132611W WO 2023093615 A1 WO2023093615 A1 WO 2023093615A1
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WO
WIPO (PCT)
Prior art keywords
cell
battery
bracket
cell string
sampling structure
Prior art date
Application number
PCT/CN2022/132611
Other languages
English (en)
French (fr)
Inventor
郭永明
郎晓强
陈威
周燕飞
陈耀磊
Original Assignee
比亚迪股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 比亚迪股份有限公司 filed Critical 比亚迪股份有限公司
Priority to CA3233402A priority Critical patent/CA3233402A1/en
Priority to KR1020247009593A priority patent/KR20240049340A/ko
Priority to AU2022397353A priority patent/AU2022397353A1/en
Publication of WO2023093615A1 publication Critical patent/WO2023093615A1/zh

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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
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • 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
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
    • 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
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/284—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with incorporated circuit boards, e.g. printed circuit boards [PCB]
    • 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
    • H01M50/509—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the type of connection, e.g. mixed connections
    • H01M50/51—Connection only in series
    • 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
    • H01M50/519—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising printed circuit boards [PCB]
    • 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
    • H01M50/569—Constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals
    • 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

Definitions

  • the present application relates to the technical field of batteries, in particular to a battery cell unit, a battery and a vehicle.
  • a sampling harness is set inside the battery to collect signals such as the voltage and/or temperature of each cell to understand the operation of each cell state.
  • the sampling harness is not positioned. When the battery vibrates for a long time, the sampling harness will shake and the connection between it and the battery cell will be easily loosened, so that the relevant information of the battery cell cannot be collected in time.
  • the present application aims to solve at least one of the technical problems existing in the prior art. For this reason, the present application proposes a battery unit, a battery and a vehicle, which are beneficial to improving the reliability of the connection between the sampling structure and the battery.
  • the present application provides a battery cell unit, the battery cell unit comprising: a battery cell string and a sampling structure;
  • the cell string includes a plurality of cell groups and at least one fixed bracket, the plurality of cell groups are arranged along the first direction and connected in series, and the electrical connection between any two adjacent cell groups is provided There is said fixing bracket;
  • the sampling structure is electrically connected to a plurality of the battery packs, the sampling structure is provided with a gap, the gap is provided with a limit bar, the limit bar is connected to the inner wall of the gap, and the fixing bracket There are first protrusions and second protrusions on the top, the first protrusions and the second protrusions are located in the gap, the first protrusions and the second protrusions are arranged at intervals to form a gap area, and the limiting strip is limitedly fitted in the spacer area.
  • a notch is provided on the sampling structure, a limit bar is provided in the notch, a first protrusion and a second protrusion are provided on the fixing bracket, and the first protrusion and the second protrusion are arranged at intervals
  • the limit bar is limited and fit in the spacer, so that the sampling structure can be fitted on the fixed bracket through the limit bar, so that the shaking of the sampling structure can be reduced, and it is beneficial to improve the connection between the sampling structure and the cell. reliability.
  • the opening of the notch is located on one side of the sampling structure along the first direction, the first protrusions and the second protrusions are distributed at intervals along the first direction, and the notch is along the The two inner walls opposite to each other in the second direction are connected to the limiting strip.
  • the sampling structure is provided with a plurality of acquisition terminals, each of the acquisition terminals is electrically connected to the corresponding battery core group, and the plurality of acquisition terminals are divided into a first acquisition terminal, a second acquisition terminal, and a second acquisition terminal.
  • a collection terminal and a third collection terminal, the first collection terminal and the second collection terminal are distributed at opposite ends of the cell string along the first direction, and the third collection terminal is located at the first Between the collection terminal and the second collection terminal, the third collection terminal is arranged on the outer edge of the sampling structure and on one side of the gap.
  • the cell unit includes at least two cell strings, at least two cell strings are arranged along the second direction, and the cell strings have opposing cells along the first direction.
  • the first end and the second end, at least two of the cell strings include a first cell string and a second cell string, and the first cell string and the second cell string pass through the respective first ends
  • the two battery packs are connected in series;
  • Both the first cell string and the second cell string include M cell groups arranged along the first direction, where M ⁇ 2 and is an integer; the collection terminals are 2M+1 and include One first collection terminal, two second collection terminals and 2M-2 third collection terminals, the first collection terminal is set at the first end of the cell string, and the two second collection terminals are set at The second end of the cell string, the sampling structure has a first side and a second side opposite to each other along the second direction, two of the second collection terminals and 2M-2 of the third collection terminals respectively uniformly distributed on the first side and the second side of the sampling structure;
  • the two cell groups at the respective first ends of the first cell string and the second cell string are electrically connected to the first collection terminal, and the first cell string and the second cell group are electrically connected to the first collection terminal.
  • the two cell groups located at their second ends in the cell string are electrically connected to the two second collection terminals in one-to-one correspondence, and the M-1 third collection terminals located on the same side of the sampling structure are arranged on each The corresponding two adjacent cell groups are electrically connected to each other.
  • in the second direction there are two notches, and there are two first protrusions and two second protrusions;
  • the first protrusion and the second protrusion are arranged in the corresponding notch, each of the notches is provided with the limiting strip, and the limiting strip is limitedly fitted to the corresponding said notch. in the spacer area.
  • the sampling structure is adhesively fixed on the fixing bracket.
  • any adjacent two battery core groups are connected by a conductive connector, and the fixing bracket is provided between any adjacent two battery core groups, and the fixing bracket is used for fixing the conductive connector;
  • the cell set includes at least two parallel cells, the cells have positive tabs and negative tabs, and the positive tabs and the negative tabs are distributed at opposite ends of the cell along the first direction ;
  • the positive tabs of all the cells in one of the two adjacent cell groups are connected to the negative tabs of all the cells in the other cell group through the conductive connector.
  • the fixing bracket includes two first brackets disposed opposite to each other along the first direction;
  • the conductive connector includes two electrically connected conductive sheets, and the two conductive sheets are fixed on the two first brackets in a one-to-one correspondence;
  • the positive tabs of all the cells in one of the two adjacent cell groups are pierced through the corresponding first bracket and connected to the conductive sheet on the first bracket, and all the positive ears of the other cell group
  • the negative tab of the battery core is passed through the corresponding first bracket and connected to the conductive sheet on the first bracket.
  • the sampling structure is disposed on one side of the cell string along the third direction, and the conductive sheet includes a body portion and a first bent portion;
  • the body parts of the two conductive sheets are located on opposite sides of the two first brackets, and the body parts are used to electrically connect with the positive tabs or negative tabs of all the cells of the corresponding battery pack. ;
  • the first bending part is provided at one end of the body part close to the sampling structure, and the first bending part is located on one side of the corresponding first bracket along the third direction.
  • a bent portion is used for electrical connection with the sampling structure.
  • the conductive sheet further includes a second bent portion, the second bent portion is disposed on one side of the body portion along the second direction, and the second bent portion is located on the corresponding On one side of the first bracket along the second direction, the second bent portion and the body portion jointly define an escape opening, and the escape opening is used to avoid at least one battery cell of the corresponding battery pack.
  • the conductive connector further includes a first connecting piece, and the second bent portions of the two conductive pieces are electrically connected through the first connecting piece.
  • the cell unit includes at least two cell strings, at least two cell strings are arranged along the second direction, and the cell strings have opposing cells along the first direction.
  • the first end and the second end, at least two of the cell strings include a first cell string and a second cell string, and the first cell string and the second cell string pass through the respective first ends
  • the two battery packs are connected in series;
  • the two cell groups facing each other in the first cell string and the second cell string correspond to the same first bracket, and two conductive sheets are arranged on the first bracket at intervals, and each of the The conductive sheet is electrically connected to the corresponding battery pack.
  • the two cell groups used to connect the first cell string and the second cell string in series are respectively a first cell group and a second cell group;
  • the battery cell unit also includes a second bracket for fixing the second connecting piece, the second bracket is located at the first end of the first battery string, the first battery group and the second battery
  • the positive tabs of all the cells in one cell group in the core group and the negative tabs of all the cells in the other cell group pass through the second bracket and are electrically connected through the second connecting piece.
  • the cell unit further includes a third bracket, on which two third connecting pieces are arranged at intervals, and the third bracket is located at the second end of the first cell string , the first cell string and the two cell groups at the second end of the second cell string are respectively the third cell group and the fourth cell group, the third cell group and the first cell group
  • the positive ears of all the batteries in one of the four battery packs are pierced through the third support and electrically connected through one of the third connecting pieces, and the negative ears of all the batteries in the other battery pack are pierced It is arranged on the third bracket and electrically connected through another third connecting piece.
  • the present application also provides a battery, the battery includes a casing and the cell unit of any one of the above embodiments, and the cell unit is arranged in the casing.
  • the present application also provides a vehicle, the vehicle comprising the battery cell unit described in any of the above embodiments or the battery in any of the above embodiments.
  • the sampling structure can be limitedly fitted on the fixed bracket through the limit strip, thereby reducing the shaking of the sampling structure and helping to improve the reliability of the connection between the sampling structure and the battery cell.
  • Fig. 1 is the schematic diagram of the battery in one embodiment of the present application.
  • Fig. 2 is a schematic diagram of the battery in Fig. 1 omitting the casing
  • Fig. 3 is a partial enlarged view of place A in Fig. 2;
  • Figure 4 is an exploded view of Figure 2;
  • Fig. 5 is a partial enlarged view of place B in Fig. 4;
  • Fig. 6 is a partial enlarged view of place C in Fig. 4;
  • Fig. 7 is a structural schematic diagram of the connection of two adjacent cell groups in the same cell string with the first bracket and the conductive sheet;
  • Figure 8 is an exploded view of Figure 7;
  • Figure 9 is an exploded view of the structure circled at D in Figure 8.
  • Figure 10 is an exploded view of the structure circled at E in Figure 8.
  • Fig. 11 is a partial structural schematic diagram of the cell unit, showing the connection of the first cell group, the second cell group, the second connecting piece and the second bracket;
  • Figure 12 is a schematic diagram of a vehicle in one embodiment of the present application.
  • the present application provides a cell unit 100 , including a cell string 101 and a sampling structure 102 .
  • the cell string 101 includes a plurality of cell groups 103 and at least one fixing bracket 104 .
  • a plurality of cell groups 103 are arranged along the first direction and connected in series, and any two adjacent cell groups 103 are electrically connected with a fixing bracket 104 .
  • the sampling structure 102 is electrically connected to a plurality of battery packs 103 , the sampling structure 102 is provided with a notch 106 , and the notch 106 is provided with a limit bar 107 , and the limit bar 107 is connected to the inner wall of the notch 106 .
  • the fixed bracket 104 is provided with a first protrusion 108 and a second protrusion 109, the first protrusion 108 and the second protrusion 109 are located in the notch 106, and the first protrusion 108 and the second protrusion 109 are arranged at intervals to form a space In the area 110 , the limiting bar 107 is limitedly fitted in the spacer area 110 .
  • the first direction may be the left-right direction in FIG. 2 , and the first direction may be consistent with the length direction of the cell string 101 or the battery 1000.
  • the battery pack 103 includes at least one battery cell 1031 , and when the battery pack 103 includes a plurality of battery cells 1031 , the battery cells 1031 are connected in parallel.
  • the battery cell 1031 can be a bare battery cell or a soft-packed battery cell.
  • the limiting fit can be understood as: the opposite sides of the limiting strip 107 directly or indirectly abut against the first protrusion 108 and the second protrusion 109, so that the limiting strip 107 is limited and fitted in the space 110 in.
  • the sampling structure 102 is provided with a notch 106, the notch 106 is provided with a limit bar 107, the fixing bracket 104 is provided with a first protrusion 108 and a second protrusion 109, and the first protrusion 108 Set at intervals with the second protrusion 109 to form a spacer 110, and the limit strip 107 is limited and fitted in the spacer 110, so that the sampling structure 102 can be limited and fitted on the fixed bracket 104 through the limit strip 107, thereby reducing sampling.
  • the shaking of the structure 102 is beneficial to improve the reliability of the connection between the sampling structure 102 and the cell 1031 .
  • the fixing bracket 104 is integrally formed with the first protrusion 108 and the second protrusion 109 , such as integral injection molding.
  • sampling structure 102 may be a flexible circuit board or a flexible flat cable.
  • the opening of the notch 106 is located on one side of the sampling structure 102 along the first direction.
  • the first protrusions 108 and the second protrusions 109 are distributed at intervals along the first direction, and the two opposite inner walls of the notch 106 along the second direction are connected to the limiting strip 107 . Therefore, by providing the limiting strip 107, the deformation problem of the opening side of the notch 106 can be improved, and the shape of the notch 106 can be kept as much as possible.
  • the second direction may be the front-back direction in FIG. 4 , and the second direction may be consistent with the thickness direction of the cell string 101 or the battery 1000 .
  • the sampling structure 102 is provided with a plurality of collection terminals 111 , and each collection terminal 111 is electrically connected to a corresponding cell set 103 .
  • the multiple collection terminals 111 are divided into a first collection terminal 112, a second collection terminal 113 and a third collection terminal 114, and the first collection terminal 112 and the second collection terminal 113 are distributed at opposite ends of the cell string 101 along the first direction , the third collection terminal 114 is located between the first collection terminal 112 and the second collection terminal 113 .
  • the third collecting terminal 114 is disposed on the outer edge of the sampling structure 102 and on one side of the notch 106 , such setting facilitates the connection between the third collecting terminal 114 and the cell pack 103 . Moreover, since the setting of the limit bar 107 can improve the problem that the opening of the notch 106 will be enlarged when the third collection terminal 114 is connected to the battery pack 103 , it can improve the connection reliability between the third collection terminal 114 and the battery pack 103 .
  • the cell unit 100 includes at least two cell strings 101 .
  • At least two cell strings 101 are arranged along the second direction, and the cell strings 101 have a first end 127 and a second end 128 opposite to each other along the first direction.
  • At least two cell strings 101 include a first cell string 115 and a second cell string 116, and the first cell string 115 and the second cell string 116 are connected in series through two cell groups 103 at their respective first ends 127 connect.
  • Both the first cell string 115 and the second cell string 116 include M cell groups 103 arranged along the first direction, where M ⁇ 2 and is an integer.
  • the number of collection terminals 111 is 2M+1, and includes one first collection terminal 112, two second collection terminals 113 and 2M-2 third collection terminals 114.
  • the first collecting terminal 112 is arranged at the first end 127 of the cell string 101
  • the two second collecting terminals 113 are arranged at the second end 128 of the cell string 101 .
  • the sampling structure 102 has a first side 129 and a second side 130 opposite along the second direction, and two second collection terminals 113 and 2M-2 third collection terminals 114 are evenly distributed on the first side 129 and the second side 114 of the sampling structure 102 respectively.
  • the second side 130 .
  • the first cell string 115 and the second cell string 116 are located at the two cell groups 103 at their respective first ends 127 and are electrically connected to the first collection terminal 112.
  • the first cell string 115 and the second cell string 116 The two battery packs 103 located at their respective second ends 128 are electrically connected to the two second collection terminals 113 in one-to-one correspondence, and the M-1 third collection terminals 114 located on the same side of the sampling structure 102 are arranged on corresponding phases. Between two adjacent cell groups 103 and electrically connected to the two adjacent cell groups 103 .
  • the first cell string 115 and the second cell string 116 are arranged along the direction from front to back, and the first cell string 115 and the second cell string 116 both include
  • the first cell string 115 and the second cell string 116 both include
  • Two second collection terminals 113 and six third collection terminals 114 are evenly distributed on the first side 129 and the second side 130 of the sampling structure 102 respectively.
  • the two leftmost cell groups 103 in the first cell string 115 and the second cell string 116 are electrically connected to the first collection terminal 112, and the rightmost in the first cell string 115 and the second cell string 116
  • the two battery packs 103 are electrically connected to the two second collection terminals 113 in a one-to-one correspondence.
  • the three third collection terminals 114 located on the first side 129 of the sampling structure 102 are arranged between the corresponding two adjacent cell groups 103 and are electrically connected with the two adjacent cell groups 103, that is, along the From left to right, the first third collection terminal 114 is located between the first battery pack 103 and the second battery pack 103 and is electrically connected to the two battery packs 103, and the second third collection terminal 114 The terminal 114 is located between the second battery pack 103 and the third battery pack 103 and is electrically connected to the two battery packs 103, and the third third acquisition terminal 114 is located between the third battery pack 103 and the third battery pack 103.
  • the four cell groups 103 are electrically connected to the two cell groups 103 .
  • connection mode between the three third collecting terminals 114 located on the second side 130 of the sampling structure 102 and the cell pack 103 is similar to the connection mode between the three third collecting terminals 114 located on the first side 129 of the sampling structure 102 and the cell pack 103 , which will not be repeated here.
  • the number of cell groups 103 contained in the first cell string 115 and the second cell string 116 can be set according to actual needs, for example, two or three.
  • collection terminals 111 can be set according to actual needs, and will not be listed here.
  • collection terminals 111 are 2M+2 and include two first collection terminals Terminal 112, two second collection terminals 113 and 2M-2 third collection terminals 114, wherein the two cell groups 103 and The two first collection terminals 112 are electrically connected in a one-to-one correspondence.
  • the cell unit 100 may also include a cell string 101 .
  • the cell string 101 has a first end 127 and a second end 128 opposite along the first direction, the first collecting terminal 112 is located at the first end 127 of the cell string 101, and the second collecting terminal 113 is located at the second end of the cell string 101. End 128.
  • the cell string 101 includes N cell groups 103 arranged along the first direction, where N ⁇ 2 and is an integer.
  • the number of collection terminals 111 is N+1, and includes one first collection terminal 112 , one second collection terminal 113 and N ⁇ 1 third collection terminals 114 .
  • the first collection terminal 112 is electrically connected to the cell group 103 at the first end 127 in the cell string 101
  • the second collection terminal 113 is electrically connected to the cell group 103 at the second end 128 in the cell string 101
  • N- The third collecting terminal 114 is arranged between two corresponding adjacent battery packs 103 and is electrically connected to the two adjacent battery packs 103.
  • the cell string 101 includes four cell groups 103 arranged from left to right, and five collection terminals 111, including a first collection terminal 112, a second collection terminal 113 and three third collection terminals. Three collection terminals 114 .
  • the first collection terminal 112 is electrically connected to the leftmost battery pack 103
  • the second collection terminal 113 is electrically connected to the rightmost battery pack 103 .
  • the three third collection terminals 114 are arranged between two corresponding adjacent cell groups 103 and are electrically connected to the two adjacent cell groups 103 .
  • the number of collection terminals 111 can be set according to actual needs. For example, in other embodiments, it can also be: collection terminals 111 are N+2, and include a first collection terminal 112, a second collection terminal terminal 113 and N third collection terminals 114 . Wherein, the two third collection terminals 114 are electrically connected to two adjacent cell sets 103 in a one-to-one correspondence.
  • each notch 106 is provided with a limiting bar 107 , and the limiting bar 107 is limited and fitted in the corresponding spacer 110 .
  • Such setting is beneficial to reduce the movement of the sampling structure 102 and is beneficial to improving the reliability of the connection between the sampling structure 102 and the battery pack 103 .
  • the sampling structure 102 is adhesively fixed on the fixing bracket 104 .
  • the sampling structure 102 can be fixedly connected to the fixed bracket 104 , which is more conducive to reducing the movement of the sampling structure 102 and improving the reliability of the connection between the sampling structure 102 and the cell string 101 .
  • the sampling structure 102 is provided with structural adhesive on one side in the thickness direction, and the sampling structure 102 is bonded and fixed on the fixing bracket 104 by the structural adhesive.
  • any two adjacent battery core groups 103 are connected by a conductive connector 117 , and any two adjacent battery core groups 103 are provided with fixed Bracket 104 , the fixing bracket 104 is used to fix the conductive connector 117 .
  • the cell pack 103 includes at least two parallel cells 1031 , the cells 1031 have positive tabs 1032 and negative tabs 1033 , and the positive tabs 1032 and negative tabs 1033 are distributed at opposite ends of the cells 1031 along the first direction.
  • the positive tabs 1032 of all the cells 1031 of one cell group 103 in any two adjacent cell groups 103 are connected to the negative tabs 1033 of all the cells 1031 of the other cell group 103 through the conductive connector 117 .
  • the first cell group 103 and the second cell group 103 respectively include two parallel cells 103, and the first cell group 103 contains The positive tabs 1032 of the two battery cells 1031 in the second battery pack 103 are connected to the negative tabs 1033 of the two battery cells 1031 through the conductive connector 117 .
  • the negative tabs 1033 of the two battery cells 1031 included in the first battery pack 103 are connected to the positive tabs 1032 of the two battery cells 1031 included in the second battery pack 103 through the conductive connector 117 .
  • the battery pack 103 may also include three or more battery cells 1031 connected in parallel.
  • the fixing bracket 104 includes two first brackets 118 oppositely disposed along a first direction.
  • the conductive connector 117 includes two electrically connected conductive sheets 119 , and the two conductive sheets 119 are respectively fixed on the two first brackets 118 .
  • the positive tabs 1032 of all the cells 1031 of one cell group 103 in any two adjacent cell groups 103 pass through the corresponding first support 118 and are connected to the conductive sheet 119 on the first support 118, and the other
  • the negative tabs 1033 of all the battery cells 1031 of the battery pack 103 pass through the corresponding first support 118 and connect with the conductive sheet 119 on the first support 118 .
  • the first conductive sheet 119 is fixed on the first first bracket 118
  • the second conductive sheet 119 is fixed on the second first bracket 118 .
  • the positive tabs 1032 of all the battery cells 1031 included in the first battery pack 103 pass through the first first support 118 and are connected to the conductive sheet 119 on the first support 118 .
  • the negative tabs 1032 of all the batteries 1031 included in the second battery pack 103 pass through the second first support 118 and connect to the conductive sheet 119 on the first support 118 .
  • the negative tabs 1033 of all the battery cells 1031 included in the first battery pack 103 pass through the first first support 118 and connect with the conductive sheet 119 on the first support 118 .
  • the positive tabs 1033 of all the battery cells 1031 included in the second battery core group 103 pass through the second first bracket 118 and are connected to the conductive sheet 119 on the first bracket 118 .
  • the sampling structure 102 is disposed on one side of the cell string 101 along the third direction, and the conductive sheet 119 includes a body portion 1191 and a first bent portion 1192 .
  • the body parts 1191 of the two conductive sheets 119 are located on opposite sides of the two first brackets 118, and the body parts 1191 are used to electrically connect with the positive tabs 1032 or negative tabs 1033 of all the battery cells 1031 of the corresponding battery pack 103 .
  • the first bending part 1192 is provided at one end of the body part 1191 close to the sampling structure 102, and the first bending part 1192 is located on one side of the corresponding first support 118 along the third direction, and the first bending part 1192 is used for sampling Structure 102 is electrically connected. Specifically, the first bending portion 1192 can be used to connect with the third collection terminal 114 . By disposing the first bending portion 1192 on one side of the first support 118 along the third direction, the connection between the first bending portion 1192 and the sampling structure 102 is facilitated.
  • the third direction may be the up-down direction in FIG. 4 , and the third direction may be consistent with the width direction of the cell string 101 or the battery 1000 .
  • the first direction may also be consistent with the width direction of the cell string 101 or the battery 1000
  • the third direction may also be consistent with the length direction of the cell string 101 or the battery 1000 .
  • the conductive sheet 119 also includes a second bent portion 1193, the second bent portion 1193 is disposed on one side of the body portion 1191 along the second direction, and the second bent portion 1193 is located on the corresponding side of the first bracket 118 along the second direction.
  • the second bent portion 1193 and the body portion 1191 together define an avoidance opening 131 for avoiding the positive tab 1032 or the negative tab 1033 of at least one battery cell 1031 of the corresponding battery pack 103 .
  • the battery core group 103 includes two parallel battery cells 1031, the positive pole ear 1032 or the negative pole ear 1033 of the two parallel battery cores 1031 protrude from the escape opening 131, or the positive pole ear 1032 of one of the battery cores 1031 Stretch out from the avoidance opening 131, and the positive pole ear 1032 of the other battery cell 1031 directly protrudes from the first support 118, or the negative pole ear 1033 of one of the battery cores 1031 protrudes from the avoidance opening 131, and the other battery core 1031
  • the negative tab 1033 directly protrudes from the first bracket 118 .
  • the conductive connector 117 further includes a first connecting piece 120 , and the second bent portions 1193 of the two conductive pieces 119 are electrically connected through the first connecting piece 120 .
  • the connection between the first connecting piece 120 and the second bending portion 1193 is facilitated.
  • the conductive sheet 119 is clipped and fixed on the corresponding first bracket 118 .
  • the first bracket 118 is provided with buckles on one side along the second direction, and the conductive piece 119 is provided with a locking hole, and the buckles are locked in the locking holes to fix the conductive piece 119 on the first bracket 118 .
  • the conductive sheet 119 may also be fixed on the corresponding first bracket 118 by screw connection.
  • the cell unit 100 includes at least two cell strings 101, the at least two cell strings 101 are arranged along the second direction, and the cell strings 101 have Directly opposite the first end 127 and the second end 128, at least two cell strings 101 include a first cell string 115 and a second cell string 116, the first cell string 115 and the second cell string 116 pass through the The two cell packs 103 of the respective first ends 127 are connected in series.
  • the number of cell strings 101 may be set according to actual needs.
  • the two cell groups 103 facing each other in the first cell string 115 and the second cell string 116 correspond to the same first bracket 118 , and the first bracket 118
  • Two conductive sheets 119 are arranged at intervals on the top, and each conductive sheet 119 is electrically connected to the corresponding cell set 103 .
  • the two cell groups 103 at the left end correspond to the same first bracket 118
  • the two cell groups 103 are arranged along the direction from front to back
  • the conductive sheet 119 on the first bracket 118 is electrically connected to the corresponding battery pack 103 .
  • the two battery packs 103 at the right end correspond to the same first bracket 118, and the two battery packs 103 are arranged along the direction from front to back, and the conductive sheet 119 on the first bracket 118 corresponds to the corresponding battery pack 103 electrical connection.
  • the two cell groups 103 used to connect the first cell string 115 and the second cell string 116 in series are the first cell group 121 and the second cell group 121 respectively.
  • battery pack 122 .
  • the battery cell unit 100 further includes a second bracket 124 for fixing the second connecting piece 123 , and the second bracket 124 is located at the first end 127 of the first battery string 115 .
  • the positive tabs 1032 of all the cells 1031 of one cell group 103 in the first cell group 121 and the second cell group 122, and the negative tabs 1033 of all the cells 1031 of the other cell group 103 pass through the first cell group 121 and the second cell group 122.
  • the two brackets 124 are electrically connected through the second connecting piece 123 .
  • the negative tabs 1033 of all the cells 1031 in the first cell group 121 and the positive tabs 1032 of all the cells 1031 in the second cell group 122 are passed through the second bracket 124 and passed through the second connecting piece. 123 electrical connections.
  • the positive tabs 1032 of all the cells 1031 of the first cell group 121 and the negative tabs 1033 of all the cells 1031 of the second cell group 122 pass through the second bracket 124 and pass through the second connecting piece 123 electrical connection.
  • the sampling structure 102 is disposed on one side of the cell string 101 along the third direction, and the second connecting piece 123 includes a base portion 1231 and an extension portion 1232 .
  • the base part 1231 is provided on the side of the second bracket 124 away from the first cell string 115, the base part 1231 is provided with a through hole 134, the negative electrode ear 1033 of at least one cell 1031 of the first cell group 121 and the second cell
  • the positive tab 1032 of at least one battery cell 1031 of the core 1031 passes through the through hole 134 and is electrically connected to two opposite sides of the base portion 1231 .
  • the positive tab 1032 of at least one cell 1031 of the first cell group 121 and the negative tab 1033 of at least one cell 1031 of the second cell 1031 pass through the through hole 134 and are opposite to the base part 1231 Both sides correspond to electrical connections.
  • the extension part 1232 is disposed at one end of the base part 1231 close to the sampling structure 102 , and the extension part 1232 is located at one side of the second bracket 124 along the third direction, and the extension part 1232 is used for electrically connecting with the sampling structure 102 . Specifically, the extension part 1232 may be connected to the first collection terminal 112 . By arranging the extension part 1232 on one side of the second bracket 124 along the third direction, the connection between the extension part 1232 and the sampling structure 102 is facilitated.
  • the second connecting piece 123 is clamped and fixed on the second bracket 124 .
  • a buckle is provided on a side of the second bracket 124 away from the first cell string 115 , and the buckle is used for snap-fitting with the base part 1231 .
  • the second connecting piece 123 may also be fixed on the corresponding second bracket 124 through screw connection.
  • the cell unit 100 further includes a third bracket 125, the third bracket 125 is located at the second end 128 of the first cell string 115, and the third bracket 125 is spaced apart from There are two third connection pieces 126, and the two cell groups 103 at the second end 128 of the first cell string 115 and the second cell string 116 are respectively the third cell group 132 and the fourth cell group 133,
  • the positive tabs 1032 of all the cells 1031 of one cell group 103 in the third cell group 132 and the fourth cell group 133 pass through the third bracket 125 and are electrically connected through a third connecting piece 126, and the other is electrically
  • the negative tabs 1033 of all the battery cells 1031 of the core pack 103 pass through the third bracket 125 and are electrically connected through another third connecting piece 126 .
  • the structure of the third connecting sheet 126 may be the same as that of the conductive sheet 119 , which will not be repeated here.
  • the present application also provides a battery 1000, which includes a case 200 and the battery unit 100 of any one of the above-mentioned embodiments.
  • the battery cell unit 100 is disposed in the casing 200 .
  • the sampling structure 102 can be limitedly fitted on the fixed bracket 104 through the limiting strip 107, thereby reducing the shaking of the sampling structure 102 and helping to improve the reliability of the connection between the sampling structure 102 and the battery cell 1031.
  • the present application also provides a vehicle 2000, including the above-mentioned battery 1000.
  • connection should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application in specific situations.
  • references to the terms “one embodiment,” “some embodiments,” “exemplary embodiments,” “example,” “specific examples,” or “some examples” are intended to mean that the implementation A specific feature, structure, material, or characteristic described by an embodiment or example is included in at least one embodiment or example of the present application.
  • schematic representations of the above terms do not necessarily refer to the same embodiment or example.
  • the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

一种电芯单元、电池及车辆，电芯单元包括电芯串和采样结构。电芯串包括多个电芯组和至少一个固定支架，多个电芯组沿第一方向排布且串联连接，任意相邻的两个电芯组的电连接处设有固定支架。采样结构与多个电芯组电连接，采样结构上设有缺口，缺口内设有限位条，限位条与缺口的内壁相连。固定支架上设有第一凸起和第二凸起，第一凸起和第二凸起位于缺口中，第一凸起和第二凸起间隔设置以形成间隔区，限位条限位配合于间隔区中。

Description

电芯单元、电池及车辆
相关申请的交叉引用
本申请基于申请号为202122903216.7、申请日为2021-11-24的中国专利申请提出，并要求上述中国专利申请的优先权，上述中国专利申请的全部内容在此引入本申请作为参考。
技术领域
本申请涉及电池技术领域，尤其是涉及一种电芯单元、电池及车辆。
背景技术
现有技术中在电池内部会设置多个串联的电芯以提高其输出电压，并且在电池内部设置采样线束采集每个电芯的电压和/或温度等信号，以了解每个电芯的工作状态。但是，采样线束并未进行定位，当电池在长期振动时采样线束会出现晃动而导致其与电芯的连接处容易松动，进而不能及时采集电芯的相关信息。
发明内容
本申请旨在至少解决现有技术中存在的技术问题之一。为此，本申请提出一种电芯单元、电池及车辆，有利于提高采样结构与电芯连接的可靠性。
一方面，本申请提供一种电芯单元，所述电芯单元包括：电芯串和采样结构；
所述电芯串包括多个电芯组和至少一个固定支架，多个所述电芯组沿第一方向排布且串联连接，任意相邻的两个所述电芯组的电连接处设有所述固定支架；
所述采样结构与多个所述电芯组电连接，所述采样结构上设有缺口，所述缺口内设有限位条，所述限位条与所述缺口的内壁连接，所述固定支架上设有第一凸起和第二凸起，所述第一凸起和所述第二凸起位于所述缺口中，所述第一凸起和所述第二凸起间隔设置以形成间隔区，所述限位条限位配合于所述间隔区中。
根据本申请实施例的电芯单元，采样结构上设有缺口，缺口内设有限位条，固定支架上设有第一凸起和第二凸起，第一凸起和第二凸起间隔设置以形成间隔区，限位条限位配合在间隔区中，这样采样结构可通过限位条限位配合在固定支架上，从而可减少采样结构的晃动，有利于提高采样结构与电芯连接的可靠性。
在一些实施例中，所述缺口的开口位于所述采样结构沿第一方向的一侧，所述第一 凸起和所述第二凸起沿所述第一方向间隔分布，所述缺口沿所述第二方向相对的两内壁与所述限位条相连。
在一些实施例中，所述采样结构上设有多个采集端子，每个所述采集端子与对应的所述电芯组电连接，多个所述采集端子分为第一采集端子、第二采集端子和第三采集端子，所述第一采集端子和所述第二采集端子分布于所述电芯串沿所述第一方向相对的两端，所述第三采集端子位于所述第一采集端子和所述第二采集端子之间，所述第三采集端子设于所述采样结构的外边缘且位于所述缺口的一侧。
在一些实施例中，所述电芯单元包括至少两个所述电芯串，至少两个所述电芯串沿第二方向排布，所述电芯串具有沿所述第一方向相对的第一端和第二端，至少两个所述电芯串包括第一电芯串和第二电芯串，所述第一电芯串和所述第二电芯串通过位于各自第一端的两个电芯组串联连接；
所述第一电芯串和所述第二电芯串均包括M个沿所述第一方向排布的电芯组，M≥2且为整数；所述采集端子为2M+1个且包括一个第一采集端子、两个第二采集端子和2M-2个第三采集端子，所述第一采集端子设于所述电芯串的第一端，两个所述第二采集端子设于所述电芯串的第二端，所述采样结构具有沿所述第二方向相对的第一侧和第二侧，两个所述第二采集端子和2M-2个所述第三采集端子分别均布于所述采样结构的第一侧和第二侧；
所述第一电芯串和所述第二电芯串中位于各自第一端的两个电芯组均与所述第一采集端子电连接，所述第一电芯串和所述第二电芯串中位于各自第二端的两个电芯组与两个所述第二采集端子一一对应电连接，位于所述采样结构同一侧的M-1个所述第三采集端子设于各自对应的相邻两个电芯组之间并与该相邻两个电芯组电连接。
在一些实施例中，在所述第二方向上，所述缺口设有两个，且所述第一凸起和所述第二凸起均设有两个；
所述第一凸起和所述第二凸起设于对应的所述缺口中，每个所述缺口中均设有所述限位条，所述限位条限位配合于对应的所述间隔区中。
在一些实施例中，所述采样结构粘接固定于固定支架上。
在一些实施例中，任意相邻的两个所述电芯组通过导电连接件连接，任意相邻的两个所述电芯组之间设有所述固定支架，所述固定支架用于固定所述导电连接件；
所述电芯组包括至少两个并联的电芯，所述电芯具有正极耳和负极耳，所述正极耳和所述负极耳沿所述第一方向分布于所述电芯相对的两端；
任意相邻两个所述电芯组中的一个电芯组的所有电芯的正极耳与另一电芯组的所 有电芯的负极耳通过所述导电连接件连接。
在一些实施例中，所述固定支架包括两个沿所述第一方向相对设置的第一支架；
所述导电连接件包括两个电连接的导电片，两个所述导电片一一对应地固定于两个所述第一支架上；
任意相邻两个所述电芯组中的一个电芯组的所有电芯的正极耳穿设于对应的第一支架并与该第一支架上的导电片连接，另一个电芯组的所有电芯的负极耳穿设于对应的第一支架并与该第一支架上的导电片连接。
在一些实施例中，所述采样结构设于所述电芯串沿第三方向的一侧，所述导电片包括本体部和第一弯折部；
两个所述导电片的本体部位于两个所述第一支架的彼此相对的两侧，所述本体部用于与对应的所述电芯组的所有电芯的正极耳或负极耳电连接；
所述第一弯折部设于所述本体部靠近所述采样结构的一端，且所述第一弯折部位于对应的所述第一支架沿所述第三方向的一侧，所述第一弯折部用于与所述采样结构电连接。
在一些实施例中，所述导电片还包括第二弯折部，所述第二弯折部设于所述本体部沿第二方向的一侧，且所述第二弯折部位于对应的所述第一支架沿所述第二方向的一侧，所述第二弯折部和所述本体部共同限定出避让口，所述避让口用于避让对应的电芯组的至少一个电芯的正极耳或负极耳；
所述导电连接件还包括第一连接片，两个所述导电片的第二弯折部通过所述第一连接片电连接。
在一些实施例中，所述电芯单元包括至少两个所述电芯串，至少两个所述电芯串沿第二方向排布，所述电芯串具有沿所述第一方向相对的第一端和第二端，至少两个所述电芯串包括第一电芯串和第二电芯串，所述第一电芯串和所述第二电芯串通过位于各自第一端的两个电芯组串联连接；
所述第一电芯串和所述第二电芯串中正对的两个电芯组对应同一个所述第一支架，该第一支架上间隔设有两个所述导电片，每个所述导电片与对应的所述电芯组电连接。
在一些实施例中，用于串联连接所述第一电芯串和所述第二电芯串的两个电芯组分别为第一电芯组和第二电芯组；
所述电芯单元还包括用于固定第二连接片的第二支架，所述第二支架位于所述第一电芯串的第一端，所述第一电芯组和所述第二电芯组中的一个电芯组的所有电芯的正极耳、以及另一个电芯组的所有电芯的负极耳穿设于所述第二支架并通过所述第二连接片 电连接。
在一些实施例中，所述电芯单元还包括第三支架，所述第三支架上间隔设有两个第三连接片，所述第三支架位于所述第一电芯串的第二端，所述第一电芯串和所述第二电芯串位于第二端的两个电芯组分别为第三电芯组和第四电芯组，所述第三电芯组和所述第四电芯组中的一个电芯组的所有电芯的正极耳穿设于所述第三支架并通过一个所述第三连接片电连接，另一个电芯组的所有电芯的负极耳穿设于所述第三支架并通过另一个所述第三连接片电连接。
另一方面，本申请还提供一种电池，所述电池包括外壳和上述任一实施例的电芯单元，所述电芯单元设于所述外壳内。
再一方面，本申请还提供一种车辆，所述车辆包括上述任一实施例所述的电芯单元或上述任一实施例的电池。
本申请提供的电池，采样结构可通过限位条限位配合在固定支架上，从而可减少采样结构的晃动，有利于提高采样结构与电芯连接的可靠性。
本申请的附加方面和优点将在下面的描述中部分给出，部分将从下面的描述中变得明显，或通过本申请的实践了解到。
附图说明
本申请的上述和/或附加的方面和优点从结合下面附图对实施例的描述中将变得明显和容易理解，其中：
图1为本申请一个实施例中的电池的示意图；
图2为图1中电池省略外壳的示意图；
图3为图2中A处的局部放大图；
图4为图2的爆炸图；
图5为图4中B处的局部放大图；
图6为图4中C处的局部放大图；
图7是同一电芯串中相邻两个电芯组与第一支架、导电片连接的结构示意图；
图8为图7的爆炸图；
图9为图8中D处圈示结构的爆炸图；
图10为图8中E处圈示结构的爆炸图；
图11是电芯单元的部分结构示意图，图中示出第一电芯组、第二电芯组、第二连接片及第二支架的连接；
图12是本申请一个实施例中的车辆的示意图。
附图标记：
2000、车辆；
1000、电池；
100、电芯单元；101、电芯串；102、采样结构；103、电芯组；1031、电芯；1032、正极耳；1033、负极耳；104、固定支架；106、缺口；107、限位条；108、第一凸起；109、第二凸起；110、间隔区；111、采集端子；112、第一采集端子；113、第二采集端子；114、第三采集端子；115、第一电芯串；116、第二电芯串；117、导电连接件；118、第一支架；119、导电片；1191、本体部；1192、第一弯折部；1193、第二弯折部；120、第一连接片；121、第一电芯组；122、第二电芯组；123、第二连接片；1231、基体部；1232、延伸部；124、第二支架；25、第三支架；126、第三连接片；127、第一端；128、第二端；129、第一侧；130、第二侧；131、避让口；132、第三电芯组；133、第四电芯组；134、贯穿孔；
200、外壳。
具体实施方式
下面详细描述本申请的实施例，所述实施例的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施例是示例性的，仅用于解释本申请，而不能理解为对本申请的限制。
在本申请的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”、“轴向”、“径向”、“周向”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。
如图1至图6所示，本申请提供了一种电芯单元100，包括电芯串101和采样结构102，电芯串101包括多个电芯组103和至少一个固定支架104。多个电芯组103沿第一方向排布且串联连接，任意相邻的两个电芯组103的电连接处设有固定支架104。采样结构102与多个电芯组103电连接，采样结构102上设有缺口106，缺口106内设有限位条107，限位条107与缺口106的内壁相连。固定支架104上设有第一凸起108和第二凸起109，第一凸起108和第二凸起109位于缺口106中，第一凸起108和第二凸起109间隔设置以形成间隔区110，限位条107限位配合于间隔区110中。其中，第一 方向可以为图2中的左右方向，第一方向可以与电芯串101或电池1000的长度方向一致。另外，电芯组103包含至少一个电芯1031，当电芯组103包含多个电芯1031时，电芯1031之间为并联连接。电芯1031可以为裸电芯，也可以为软包电芯。
需要说明的是，限位配合可理解为：限位条107相对的两侧直接或者间接地与第一凸起108和第二凸起109相抵，以使限位条107限位配合在间隔区110中。本申请提供的电芯单元100，采样结构102上设有缺口106，缺口106内设有限位条107，固定支架104上设有第一凸起108和第二凸起109，第一凸起108和第二凸起109间隔设置以形成间隔区110，限位条107限位配合在间隔区110中，这样采样结构102可通过限位条107限位配合在固定支架104上，从而可减少采样结构102的晃动，有利于提高采样结构102与电芯1031连接的可靠性。
在一些实施例中，固定支架104与第一凸起108、第二凸起109为一体成型件，例如一体注塑成型。
在一些实施例中，采样结构102可以为柔性线路板或柔性扁平电缆。
在一些实施例中，如图4至图6所示，缺口106的开口位于采样结构102沿第一方向的一侧。第一凸起108和第二凸起109沿第一方向间隔分布，缺口106沿第二方向相对的两内壁与限位条107相连。由此，通过设置限位条107，可以改善缺口106的开口侧的变形问题，尽量保持缺口106的形状。其中，第二方向可以为图4中的前后方向，第二方向可以与电芯串101或电池1000的厚度方向一致。
在一些实施例中，如图2至图6所示，采样结构102上设有多个采集端子111，每个采集端子111与对应的电芯组103电连接。多个采集端子111分为第一采集端子112、第二采集端子113和第三采集端子114，第一采集端子112和第二采集端子113分布于电芯串101沿第一方向相对的两端，第三采集端子114位于第一采集端子112和第二采集端子113之间。第三采集端子114设于采样结构102的外边缘且位于缺口106的一侧，如此设置可便于第三采集端子114和电芯组103的连接。而且，由于设置限位条107可以改善第三采集端子114和电芯组103连接时将缺口106的开口拉扯变大的问题，提升第三采集端子114和电芯组103的连接可靠性。
在一些实施例中，如图2和图4所示，电芯单元100包括至少两个电芯串101。至少两个电芯串101沿第二方向排布，电芯串101具有沿第一方向相对的第一端127和第二端128。至少两个电芯串101包括第一电芯串115和第二电芯串116，第一电芯串115和第二电芯串116通过位于各自第一端127的两个电芯组103串联连接。第一电芯串115和第二电芯串116均包括M个沿第一方向排布的电芯组103，M≥2且为整数。采集 端子111为2M+1个，且包括一个第一采集端子112、两个第二采集端子113和2M-2个第三采集端子114。第一采集端子112设于电芯串101的第一端127，两个第二采集端子113设于电芯串101的第二端128。采样结构102具有沿第二方向相对的第一侧129和第二侧130，两个第二采集端子113和2M-2个第三采集端子114分别均布于采样结构102的第一侧129和第二侧130。第一电芯串115和第二电芯串116中位于各自第一端127的两个电芯组103均与第一采集端子112电连接，第一电芯串115和第二电芯串116中位于各自第二端128的两个电芯组103与两个第二采集端子113一一对应电连接，位于采样结构102同一侧的M-1个第三采集端子114设于各自对应的相邻两个电芯组103之间并与该相邻两个电芯组103电连接。
如图2和图4所示，第一电芯串115和第二电芯串116沿从前到后的方向排布，第一电芯串115和第二电芯串116均包括沿从左到右的方向排布的四个电芯组103，采集端子111为九个且包括一个第一采集端子112、两个第二采集端子113和六个第三采集端子114。两个第二采集端子113和六个第三采集端子114分别均布于采样结构102的第一侧129和第二侧130。第一电芯串115和第二电芯串116中位于最左端的两个电芯组103与第一采集端子112电连接，第一电芯串115和第二电芯串116中位于最右端的两个电芯组103与两个第二采集端子113一一对应电连接。位于采样结构102第一侧129的三个第三采集端子114设于各自对应的相邻两个电芯组103之间并与该相邻两个电芯组103电连接，也即，沿从左到右的方向，第一个第三采集端子114位于第一个电芯组103和第二个电芯组103之间并与该两个电芯组103电连接，第二个第三采集端子114位于第二个电芯组103和第三个电芯组103之间并与该两个电芯组103电连接，第三个第三采集端子114位于第三个电芯组103和第四个电芯组103之间并与该两个电芯组103电连接。位于采样结构102第二侧130的三个第三采集端子114和电芯组103的连接方式与位于采样结构102第一侧129的三个第三采集端子114和电芯组103的连接方式类似，在此不再赘述。另外，第一电芯串115和第二电芯串116包含的电芯组103的数量可以根据实际需求设置，例如两个或三个。
需要说明的是，采集端子111的数量可根据实际需求进行设置，在此不一一列举，例如在其他实施例中，还可以是：采集端子111为2M+2个且包括两个第一采集端子112、两个第二采集端子113和2M-2个第三采集端子114，其中第一电芯串115和第二电芯串116中位于各自第一端127的两个电芯组103与两个第一采集端子112一一对应电连接。
在另一些实施例中，电芯单元100也可包括一个电芯串101。电芯串101具有沿第 一方向相对的第一端127和第二端128，第一采集端子112位于电芯串101的第一端127，第二采集端子113位于电芯串101的第二端128。电芯串101包括N个沿第一方向排布的电芯组103，N≥2且为整数。采集端子111为N+1个，且包括一个第一采集端子112、一个第二采集端子113和N-1个第三采集端子114。第一采集端子112与电芯串101中位于第一端127的电芯组103电连接，第二采集端子113与电芯串101中位于第二端128的电芯组103电连接，N-1第三采集端子114设于各自对应的相邻两个电芯组103之间并与该相邻两个电芯组103电连接。例如，电芯串101包括沿从左到右的方向排布的四个电芯组103，采集端子111为五个，且包括一个第一采集端子112、一个第二采集端子113和三个第三采集端子114。第一采集端子112与位于最左端的电芯组103电连接，第二采集端子113与位于最右端的电芯组103电连接。沿从左到右的方向，三个第三采集端子114设于各自对应的相邻两个电芯组103之间并与该相邻两个电芯组103电连接。需要说明的是，采集端子111的数量可根据实际需求进行设置，例如在其他实施例中，还可以是：采集端子111为N+2个，且包括一个第一采集端子112、一个第二采集端子113和N个第三采集端子114。其中，两个第三采集端子114与相邻两个电芯组103一一对应电连接。
在一些实施例中，如图4至图6所示，在第二方向上，缺口106设有两个，且第一凸起108和第二凸起109均设有两个。第一凸起108和第二凸起109设于对应的缺口106中，每个缺口106中均设有限位条107，限位条107限位配合于对应的间隔区110中。如此设置，有利于减少采样结构102的窜动，有利于提高采样结构102与电芯组103连接的可靠性。
在一些实施例中，采样结构102粘接固定于固定支架104上。如此，可使采样结构102与固定支架104固定连接，从而更有利于减小采样结构102的窜动，有利于提高采样结构102与电芯串101连接的可靠性。具体地，采样结构102在厚度方向的一侧设有结构胶，采样结构102通过结构胶粘接固定在固定支架104上。
在一些实施例中，如图2、图7至图10所示，任意相邻的两个电芯组103通过导电连接件117连接，任意相邻的两个电芯组103之间设有固定支架104，固定支架104用于固定导电连接件117。电芯组103包括至少两个并联的电芯1031，电芯1031具有正极耳1032和负极耳1033，正极耳1032和负极耳1033沿第一方向分布于电芯1031相对的两端。任意相邻两个电芯组103中的一个电芯组103的所有电芯1031的正极耳1032与另一电芯组103的所有电芯1031的负极耳1033通过导电连接件117连接。如图7至图9所示，沿从左到右的方向，第一个电芯组103和第二个电芯组103分别包括两 个并联的电芯103，第一个电芯组103包含的两个电芯1031的正极耳1032与第二个电芯组103包含的两个电芯1031的负极耳1033通过导电连接件117连接。当然，也可以是，第一个电芯组103包含的两个电芯1031的负极耳1033与第二个电芯组103包含的两个电芯1031的正极耳1032通过导电连接件117连接。另外，电芯组103还可以包含三个及以上的并联的电芯1031。
在一些实施例中，如图7至图10所示，固定支架104包括两个沿第一方向相对设置的第一支架118。导电连接件117包括两个电连接的导电片119，两个导电片119一一对应地固定于两个第一支架118上。任意相邻两个电芯组103中的一个电芯组103的所有电芯1031的正极耳1032穿设于对应的第一支架118并与该第一支架118上的导电片119连接，另一个电芯组103的所有电芯1031的负极耳1033穿设于对应的第一支架118并与该第一支架118上的导电片119连接。如图7至图9所示，沿从左到右的方向，第一个导电片119固定在第一个第一支架118上，第二个导电片119固定在第二个第一支架118上。第一个电芯组103包含的所有电芯1031的正极耳1032穿设于第一个第一支架118并与该第一支架118上的导电片119连接。第二个电芯组103包含的所有电芯1031的负极耳1032穿设于第二个第一支架118并与该第一支架118上的导电片119连接。当然，也可以是第一个电芯组103包含的所有电芯1031的负极耳1033穿设于第一个第一支架118并与该第一支架118上的导电片119连接。第二个电芯组103包含的所有电芯1031的正极耳1033穿设于第二个第一支架118并与该第一支架118上的导电片119连接。
在一些实施例中，如图4至图8所示，采样结构102设于电芯串101沿第三方向的一侧，导电片119包括本体部1191和第一弯折部1192。两个导电片119的本体部1191位于两个第一支架118的彼此相对的两侧，本体部1191用于与对应的电芯组103的所有电芯1031的正极耳1032或负极耳1033电连接。第一弯折部1192设于本体部1191靠近采样结构102的一端，且第一弯折部1192位于对应的第一支架118沿第三方向的一侧，第一弯折部1192用于与采样结构102电连接。具体地，第一弯折部1192可以用于与第三采集端子114连接。通过将第一弯折部1192设于第一支架118沿第三方向的一侧，有利于第一弯折部1192与采样结构102的连接。其中，第三方向可以为图4中的上下方向，第三方向可以与电芯串101或电池1000的宽度方向一致。当然，在其他实施例中，第一方向也可与电芯串101或电池1000的宽度方向一致，第三方向也可与电芯串101或电池1000的长度方向一致。
进一步地，导电片119还包括第二弯折部1193，第二弯折部1193设于本体部1191 沿第二方向的一侧，且第二弯折部1193位于对应的第一支架118沿第二方向的一侧，第二弯折部1193和本体部1191共同限定出避让口131，避让口131用于避让对应的电芯组103的至少一个电芯1031的正极耳1032或负极耳1033。例如，电芯组103包括两个并联的电芯1031，该并联的两个电芯1031的正极耳1032或负极耳1033均从避让口131中伸出，或者其中一个电芯1031的正极耳1032从避让口131中伸出，另一个电芯1031的正极耳1032直接从第一支架118中伸出，或者其中一个电芯1031的负极耳1033从避让口131中伸出，另一个电芯1031的负极耳1033直接从第一支架118中伸出。
进一步地，导电连接件117还包括第一连接片120，两个导电片119的第二弯折部1193通过第一连接片120电连接。通过将第二弯折部1193设于第一支架118沿第二方向的一侧，有利于第一连接片120与第二弯折部1193的连接。
在一些实施例中，导电片119卡接固定于对应的第一支架118上。具体地，第一支架118沿第二方向一侧设有卡扣，导电片119上设有卡孔，卡扣卡持在卡孔中，以将导电片119固定于第一支架118上。当然，在其他实施例中，导电片119也可通过螺纹连接的方式固定于对应的第一支架118上。
在一些实施例中，如图2至图4所示，电芯单元100包括至少两个电芯串101，至少两个电芯串101沿第二方向排布，电芯串101具有沿第一方向相对的第一端127和第二端128，至少两个电芯串101包括第一电芯串115和第二电芯串116，第一电芯串115和第二电芯串116通过位于各自第一端127的两个电芯组103串联连接。当然，电芯串101还可以为三个及以上，也即电芯串101的数量可以根据实际需求进行设置。
进一步地，如图2、图7及图8所示，第一电芯串115和第二电芯串116中正对的两个电芯组103对应同一个第一支架118，该第一支架118上间隔设有两个导电片119，每个导电片119与对应的电芯组103电连接。如图8至图9所示，沿从左到右的方向，位于左端的两个电芯组103对应同一个第一支架118，该两个电芯组103沿从前到后的方向排布，该第一支架118上的导电片119与对应的电芯组103电连接。位于右端的两个电芯组103对应同一个第一支架118，该两个电芯组103沿从前到后的方向排布，该第一支架118上的导电片119与对应的电芯组103电连接。
在一些实施例中，如图2及图11所示，用于串联连接第一电芯串115和第二电芯串116的两个电芯组103分别为第一电芯组121和第二电芯组122。电芯单元100还包括用于固定第二连接片123的第二支架124，第二支架124位于第一电芯串115的第一端127。第一电芯组121和第二电芯组122中的一个电芯组103的所有电芯1031的正 极耳1032、以及另一个电芯组103的所有电芯1031的负极耳1033穿设于第二支架124并通过第二连接片123电连接。如图11所示，第一电芯组121的所有电芯1031的负极耳1033和第二电芯组122的所有电芯1031的正极耳1032穿设于第二支架124并通过第二连接片123电连接。当然，也可以是第一电芯组121的所有电芯1031的正极耳1032和第二电芯组122的所有电芯1031的负极耳1033穿设于第二支架124并通过第二连接片123电连接。
在一些实施例中，如图2、图3及图11所示，采样结构102设于电芯串101沿第三方向的一侧，第二连接片123包括基体部1231和延伸部1232。基体部1231设于第二支架124背离第一电芯串115的一侧，基体部1231上设有贯穿孔134，第一电芯组121的至少一个电芯1031的负极耳1033和第二电芯1031的至少一个电芯1031的正极耳1032穿设于贯穿孔134并与基体部1231相对的两侧对应电连接。当然，也可以是第一电芯组121的至少一个电芯1031的正极耳1032和第二电芯1031的至少一个电芯1031的负极耳1033穿设于贯穿孔134并与基体部1231相对的两侧对应电连接。
延伸部1232设于基体部1231靠近采样结构102的一端，且延伸部1232位于第二支架124沿第三方向的一侧，延伸部1232用于与采样结构102电连接。具体地，延伸部1232可以与第一采集端子112连接。通过将延伸部1232设于第二支架124沿第三方向的一侧，有利于延伸部1232与采样结构102的连接。
在一些实施例中，第二连接片123卡接固定于第二支架124上。具体地，第二支架124背离第一电芯串115的一侧设有卡扣，卡扣用于与基体部1231卡接配合。当然，在其他实施例中，第二连接片123也可通过螺纹连接的方式固定于对应的第二支架124上。
在一些实施例中，如图2和图4所示，电芯单元100还包括第三支架125，第三支架125位于第一电芯串115的第二端128，第三支架125上间隔设有两个第三连接片126，第一电芯串115和第二电芯串116位于第二端128的两个电芯组103分别为第三电芯组132和第四电芯组133，第三电芯组132和第四电芯组133中的一个电芯组103的所有电芯1031的正极耳1032穿设于第三支架125并通过一个第三连接片126电连接，另一个电芯组103的所有电芯1031的负极耳1033穿设于第三支架125并通过另一个第三连接片126电连接。
其中，第三连接片126的结构可以与导电片119的结构相同，在此不再赘述。
另一方面，本申请还提供一种电池1000，包括外壳200和上述任一实施例的电芯单元100。电芯单元100设于外壳200内。本申请提供的电池1000，采样结构102可通过 限位条107限位配合在固定支架104上，从而可减少采样结构102的晃动，有利于提高采样结构102与电芯1031连接的可靠性。
再一方面，本申请还提供一种车辆2000，包括上述的电池1000。
在本申请的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。此外，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征。在本申请的描述中，除非另有说明，“多个”的含义是两个或两个以上。
在本申请的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本申请中的具体含义。
在本说明书的描述中，参考术语“一个实施例”、“一些实施例”、“示意性实施例”、“示例”、“具体示例”、或“一些示例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本申请的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不一定指的是相同的实施例或示例。而且，描述的具体特征、结构、材料或者特点可以在任何的一个或多个实施例或示例中以合适的方式结合。
尽管已经示出和描述了本申请的实施例，本领域的普通技术人员可以理解：在不脱离本申请的原理和宗旨的情况下可以对这些实施例进行多种变化、修改、替换和变型，本申请的范围由权利要求及其等同物限定。

Claims (15)

  1. 一种电芯单元，其中，所述电芯单元包括：电芯串和采样结构；
    所述电芯串包括多个电芯组和至少一个固定支架，多个所述电芯组沿第一方向排布且串联连接，任意相邻的两个所述电芯组的电连接处设有所述固定支架；
    所述采样结构与多个所述电芯组电连接，所述采样结构上设有缺口，所述缺口内设有限位条，所述限位条与所述缺口的内壁相连；所述固定支架上设有第一凸起和第二凸起，所述第一凸起和所述第二凸起位于所述缺口中，所述第一凸起和所述第二凸起间隔设置以形成间隔区，所述限位条限位配合于所述间隔区中。
  2. 根据权利要求1所述的电芯单元，其中，所述缺口的开口位于所述采样结构沿第一方向的一侧，所述第一凸起和所述第二凸起沿所述第一方向间隔分布，所述缺口沿所述第二方向相对的两内壁与所述限位条相连。
  3. 根据权利要求1或2所述的电芯单元，其中，所述采样结构上设有多个采集端子，每个所述采集端子与对应的所述电芯组电连接，多个所述采集端子分为第一采集端子、第二采集端子和第三采集端子，所述第一采集端子和所述第二采集端子分布于所述电芯串沿所述第一方向相对的两端，所述第三采集端子位于所述第一采集端子和所述第二采集端子之间，所述第三采集端子设于所述采样结构的外边缘且位于所述缺口的一侧。
  4. 根据权利要求3所述的电芯单元，其中，所述电芯单元包括至少两个所述电芯串，至少两个所述电芯串沿第二方向排布，所述电芯串具有沿所述第一方向相对的第一端和第二端，至少两个所述电芯串包括第一电芯串和第二电芯串，所述第一电芯串和所述第二电芯串通过位于各自第一端的两个电芯组串联连接；
    所述第一电芯串和所述第二电芯串均包括M个沿所述第一方向排布的所述电芯组，M≥2且为整数；所述采集端子为2M+1个且包括一个所述第一采集端子、两个所述第二采集端子和2M-2个所述第三采集端子，所述第一采集端子设于所述电芯串的第一端，两个所述第二采集端子设于所述电芯串的第二端，所述采样结构具有沿所述第二方向相对的第一侧和第二侧，两个所述第二采集端子和2M-2个所述第三采集端子分别均布于所述采样结构的第一侧和第二侧；
    所述第一电芯串和所述第二电芯串中位于各自第一端的两个所述电芯组均与所述第一采集端子电连接，所述第一电芯串和所述第二电芯串中位于各自第二端的两个所述电芯组与两个所述第二采集端子一一对应电连接，位于所述采样结构同一侧的M-1个所述第三采集端子设于各自对应的相邻两个所述电芯组之间并与该相邻两个所述电芯组电连接。
  5. 根据权利要求4所述的电芯单元，其中，在所述第二方向上，所述缺口设有两个， 且所述第一凸起和所述第二凸起均设有两个；
    所述第一凸起和所述第二凸起设于对应的所述缺口中，每个所述缺口中均设有所述限位条，所述限位条限位配合于对应的所述间隔区中。
  6. 根据权利要求1至5任一项所述的电芯单元，其中，所述采样结构粘接固定于固定支架上。
  7. 根据权利要求1至6任一项所述的电芯单元，其中，任意相邻的两个所述电芯组通过导电连接件连接，任意相邻的两个所述电芯组之间设有所述固定支架，所述固定支架用于固定所述导电连接件；
    所述电芯组包括至少两个并联的电芯，所述电芯具有正极耳和负极耳，所述正极耳和所述负极耳沿所述第一方向分布于所述电芯相对的两端；
    任意相邻两个所述电芯组中的一个所述电芯组的所有电芯的正极耳与另一所述电芯组的所有电芯的负极耳通过所述导电连接件连接。
  8. 根据权利要求7所述的电芯单元，其中，所述固定支架包括两个沿所述第一方向相对设置的第一支架；
    所述导电连接件包括两个电连接的导电片，两个所述导电片一一对应地固定于两个所述第一支架上；
    任意相邻两个所述电芯组中的一个电芯组的所有电芯的正极耳穿设于对应的所述第一支架并与该第一支架上的所述导电片连接，另一个电芯组的所有电芯的负极耳穿设于对应的所述第一支架并与该第一支架上的所述导电片连接。
  9. 根据权利要求8所述的电芯单元，其中，所述采样结构设于所述电芯串沿第三方向的一侧，所述导电片包括本体部和第一弯折部；
    两个所述导电片的本体部位于两个所述第一支架的彼此相对的两侧，所述本体部用于与对应的所述电芯组的所有电芯的正极耳或负极耳电连接；
    所述第一弯折部设于所述本体部靠近所述采样结构的一端，且所述第一弯折部位于对应的所述第一支架沿所述第三方向的一侧，所述第一弯折部用于与所述采样结构电连接。
  10. 根据权利要求9所述的电芯单元，其中，所述导电片还包括第二弯折部，所述第二弯折部设于所述本体部沿第二方向的一侧，且所述第二弯折部位于对应的所述第一支架沿所述第二方向的一侧，所述第二弯折部和所述本体部共同限定出避让口，所述避让口用于避让对应的电芯组的至少一个所述电芯的正极耳或负极耳；
    所述导电连接件还包括第一连接片，两个所述导电片的所述第二弯折部通过所述第一连接片电连接。
  11. 根据权利要求8至10任一项所述的电芯单元，其中，所述电芯单元包括至少两个 所述电芯串，至少两个所述电芯串沿第二方向排布，所述电芯串具有沿所述第一方向相对的第一端和第二端，至少两个所述电芯串包括第一电芯串和第二电芯串，所述第一电芯串和所述第二电芯串通过位于各自第一端的两个电芯组串联连接；
    所述第一电芯串和所述第二电芯串中正对的两个电芯组对应同一个所述第一支架，该第一支架上间隔设有两个所述导电片，每个所述导电片与对应的所述电芯组电连接。
  12. 根据权利要求11所述的电芯单元，其中，用于串联连接所述第一电芯串和所述第二电芯串的两个电芯组分别为第一电芯组和第二电芯组；
    所述电芯单元还包括用于固定第二连接片的第二支架，所述第二支架位于所述第一电芯串的第一端，所述第一电芯组和所述第二电芯组中的一个电芯组的所有电芯的正极耳、以及另一个电芯组的所有电芯的负极耳穿设于所述第二支架并通过所述第二连接片电连接。
  13. 根据权利要求11至12任一项所述的电芯单元，其中，所述电芯单元还包括第三支架，所述第三支架上间隔设有两个第三连接片，所述第三支架位于所述第一电芯串的第二端，所述第一电芯串和所述第二电芯串位于第二端的两个电芯组分别为第三电芯组和第四电芯组，所述第三电芯组和所述第四电芯组中的一个电芯组的所有电芯的正极耳穿设于所述第三支架并通过一个所述第三连接片电连接，另一个电芯组的所有电芯的负极耳穿设于所述第三支架并通过另一个所述第三连接片电连接。
  14. 一种电池，其中，包括外壳和如权利要求1-13任一项所述的电芯单元，所述电芯单元设于所述外壳内。
  15. 一种车辆，其中，包括如权利要求1-13任一项所述的电芯单元或如权利要求14所述的电池。
PCT/CN2022/132611 2021-11-24 2022-11-17 电芯单元、电池及车辆 WO2023093615A1 (zh)

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