WO2024087099A1 - 电池及用电装置 - Google Patents

电池及用电装置 Download PDF

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Publication number
WO2024087099A1
WO2024087099A1 PCT/CN2022/127963 CN2022127963W WO2024087099A1 WO 2024087099 A1 WO2024087099 A1 WO 2024087099A1 CN 2022127963 W CN2022127963 W CN 2022127963W WO 2024087099 A1 WO2024087099 A1 WO 2024087099A1
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WIPO (PCT)
Prior art keywords
battery
battery cell
cell
cells
row
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PCT/CN2022/127963
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English (en)
French (fr)
Inventor
许虎
金海族
赵丰刚
牛少军
曾毓群
Original Assignee
宁德时代新能源科技股份有限公司
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.)
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Application filed by 宁德时代新能源科技股份有限公司 filed Critical 宁德时代新能源科技股份有限公司
Priority to PCT/CN2022/127963 priority Critical patent/WO2024087099A1/zh
Publication of WO2024087099A1 publication Critical patent/WO2024087099A1/zh

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • 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
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • 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
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular 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
    • H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method

Definitions

  • the present application relates to the field of battery technology, and in particular to a battery and an electrical device.
  • the structural strength of the battery is poor, and the structure is easily damaged when the battery collides or the like.
  • the embodiments of the present application provide a battery and an electrical device, which improve the overall structural strength and prevent the battery cells from being damaged by impact.
  • an embodiment of the present application provides a battery, comprising a plurality of battery cells, wherein the plurality of battery cells include: at least one first battery cell and at least one second battery cell, the length of the first battery cell is greater than the length of the second battery cell, and the first battery cell is adjacent to and connected to the second battery cell.
  • the length of the first battery cell is greater than the length of the second battery cell, and the first battery cell is connected to the adjacent second battery cell, so that the strength of the second battery cell and the overall structural strength of the battery can be improved, the stability and service life of the battery cell are improved, the safety and reliability of the battery are guaranteed, and it is also beneficial to improve the space utilization rate inside the battery.
  • the length size design of the second battery cell is more flexible to meet the use requirements of different batteries.
  • the first battery cells are multiple and constitute at least one first battery row, and the first battery row includes one first battery cell or multiple first battery cells stacked along the thickness direction.
  • the structure of the first battery row is more compact, and the connection between the multiple first battery cells is more reliable, further improving the structural strength.
  • the second battery cells are multiple, and the first battery cell is connected to at least two of the second battery cells.
  • the overall structural strength is further improved.
  • a plurality of the second battery cells constitute a plurality of second battery rows, each of the second battery rows includes a plurality of the second battery cells arranged along the length direction of the second battery cells; the first battery cell connects a plurality of the second battery cells of the same second battery row; and/or the first battery cell connects at least two of the second battery rows.
  • At least two of the second battery rows are arranged along the first direction, the length direction of the second battery cells is the second direction, the first direction is perpendicular to the second direction, and the length direction of at least one of the first battery cells is parallel to the first direction and is located between two adjacent second battery cells in the second battery row.
  • the overall structural strength is further improved.
  • the number of the second battery rows arranged along the first direction is M, and the length of the first battery cell is greater than the sum of the dimensions of M-1 second battery rows along the first direction.
  • the thickness direction of the first battery cell is parallel to the second direction, wherein the thickness direction of the second battery cell is parallel to the first direction; or, the thickness direction of the second battery cell is parallel to a third direction, the first direction and the second direction are both perpendicular to the third direction, and at least two of the second battery rows are stacked along the third direction and are connected to adjacent first battery cells.
  • the first battery cell and the second battery cell are arranged in different directions to further improve the overall rigidity.
  • the length direction of the second battery cell is the second direction
  • the length direction of at least one of the first battery cells is parallel to the second direction
  • the first battery cell is stacked and connected with the second battery row along the first direction or the third direction
  • the first direction, the second direction and the third direction are perpendicular to each other.
  • the first battery cell can be connected to multiple second battery cells of the same second battery row to improve the structural strength inside the second battery row.
  • the second battery row includes N second battery cells, and the length of the first battery cell is greater than the sum of the lengths of N-1 second battery cells. In the above technical solution, it is ensured that each second battery cell can be connected to the first battery cell.
  • At least two second battery rows are provided on the same side of the first battery cell along the first direction, and the at least two second battery rows are stacked along the third direction; and/or, the first battery cell is provided with the second battery row on at least one side along the first direction and at least one side along the third direction, respectively.
  • the first battery cell can be connected to at least two second battery rows to further improve the overall rigidity.
  • the thickness direction of the second battery cell is parallel to or perpendicular to the thickness direction of the first battery cell.
  • the first battery cell and the second battery cell are arranged compactly, or different arrangements are used to improve the overall rigidity.
  • electrical connection parts are respectively provided on both sides of the length direction of the first battery cell, and electrical connection parts are respectively provided on both sides of the length direction of the second battery row, and the electrical connection part on one side of the second battery row is connected to one of the electrical connection parts of the first battery cell through an electrical connector; the electrical connection part on the other side of the second battery row is connected to the other electrical connection part of the first battery cell through an electrical connector.
  • the first battery cell plays the role of electrical connection transfer, so as to save additional transfer structures such as busbars.
  • the second battery row includes two second battery cells, and the two second battery cells are provided with the electrical connection part on the sides away from each other; or, the second battery row includes at least two second battery cells, and the electrical connection parts are provided on both sides of the length direction of each second battery cell, and the electrical connection parts of two adjacent second battery cells facing each other are connected.
  • the multiple second battery cells of the second battery row support each other to improve the overall rigidity.
  • At least one of the battery cells is a battery cell without a discharge platform, and in the discharge curve of the battery cell without a discharge platform, within the range of 5% to 95% discharge capacity, each 5% discharge capacity is a value point, and the slope of the line connecting two adjacent value points is greater than or equal to 1.
  • the use of battery cells without a discharge platform can improve the accuracy of power detection.
  • At least one of the battery cells is a battery cell with a discharge platform, and the slope of the line connecting two adjacent value points in the discharge curve of the battery cell with a discharge platform is less than 1.
  • the battery life can be improved by using the battery cell with a discharge platform.
  • the first battery cell is a battery cell with a discharge platform
  • the second battery cell is a battery cell without a discharge platform.
  • the thermal runaway temperature thresholds of at least two of the battery cells are not equal.
  • the battery cell with a higher thermal runaway temperature threshold can serve as a heat insulation barrier to prevent the thermal runaway from spreading.
  • the thermal runaway temperature threshold of the first battery cell is higher than the thermal runaway temperature threshold of the second battery cell.
  • the first battery cell is safer, which is conducive to reducing the difficulty of processing and has a better effect in preventing the spread of thermal runaway.
  • the first battery cell is a lithium iron phosphate battery cell
  • the second battery cell is a ternary battery cell.
  • the battery cell is provided with a pressure relief portion and an electrical connection portion, and the pressure relief portion and the electrical connection portion are provided on different sides of the battery cell.
  • the electrical connection portion is prevented from overheating and causing fire and explosion during thermal runaway pressure relief.
  • an embodiment of the present application further provides an electrical device, comprising the above-mentioned battery, wherein the battery is used to provide electrical energy to the electrical device.
  • FIG1 is a view of a battery according to a first embodiment of the present application along a third direction;
  • FIG2 is a view of a battery according to a second embodiment of the present application along a third direction;
  • FIG3 is a view of FIG2 along a second direction
  • FIG4 is a view of a battery according to a third embodiment of the present application along a third direction;
  • FIG5 is a view of a battery according to a fourth embodiment of the present application along a third direction;
  • FIG6 is a view of FIG5 along a second direction
  • FIG7 is a view of a battery according to a fifth embodiment of the present application along a third direction;
  • FIG8 is a view of FIG7 along a second direction
  • FIG. 9 to 11 are schematic diagrams of battery cells according to three embodiments of the present application.
  • FIG. 12 is a schematic diagram of an electrical device according to some embodiments of the present application.
  • Battery cell 10 first battery cell 11; second battery cell 12; electrical connection portion 13; pressure relief portion 14;
  • the terms “installed”, “connected”, “connected”, and “attached” should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements.
  • installed should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements.
  • a and/or B can represent: A exists alone, A and B exist at the same time, and B exists alone.
  • the character "/" in this application generally indicates that the associated objects before and after are in an "or" relationship.
  • a battery refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity.
  • the battery mentioned in this application may include a battery module or a battery pack.
  • Some batteries may include a casing for encapsulating one or more battery cells or multiple battery modules. The casing can prevent liquids or other foreign matter from affecting the charging or discharging of the battery cells.
  • some batteries may not include the above-mentioned casing and are directly set in the battery installation compartment of the electrical device.
  • battery cells may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries or magnesium-ion batteries, etc., and the embodiments of the present application do not limit this.
  • Battery cells may be cylindrical, flat, rectangular or other shapes, etc., and the embodiments of the present application do not limit this. Battery cells are generally divided into three types according to the packaging method: cylindrical battery cells, square battery cells and soft-pack battery cells, and the embodiments of the present application do not limit this.
  • a battery cell may include a shell, an electrode assembly and an electrolyte, and the shell is used to contain the electrode assembly and the electrolyte.
  • the electrode assembly is composed of a positive electrode sheet, a negative electrode sheet and a separator.
  • the battery cell mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work.
  • the positive electrode sheet includes a positive electrode collector and a positive electrode active material layer, the positive electrode active material layer is coated on the surface of the positive electrode collector, the positive electrode collector not coated with the positive electrode active material layer protrudes from the positive electrode collector coated with the positive electrode active material layer, and the positive electrode collector not coated with the positive electrode active material layer serves as a positive electrode ear.
  • the material of the positive electrode collector can be aluminum, and the positive electrode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganese oxide, etc.
  • the negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer.
  • the negative electrode active material layer is coated on the surface of the negative electrode current collector.
  • the negative electrode current collector not coated with the negative electrode active material layer protrudes from the negative electrode current collector coated with the negative electrode active material layer.
  • the negative electrode current collector not coated with the negative electrode active material layer serves as a negative electrode tab.
  • the material of the negative electrode current collector can be copper, and the negative electrode active material can be carbon or silicon, etc. In order to ensure that a large current passes without melting, the number of positive electrode tabs is multiple and stacked together, and the number of negative electrode tabs is multiple and stacked together.
  • the material of the isolation film may be PP (polypropylene) or PE (polyethylene), etc.
  • the electrode assembly may be a winding structure or a stacked structure, but the embodiments of the present application are not limited thereto.
  • the battery cell may be provided with electrode terminals and the like connected to the tabs as the electrical connection part of the battery cell.
  • the battery cell may have a pressure relief part.
  • the pressure relief part is used to release the internal substances of the battery cell (for example, gas, liquid, particulate matter, etc.) to reduce the internal pressure of the battery cell and avoid the internal pressure of the battery cell being too quickly pressurized, which may lead to dangerous accidents such as explosion of the battery cell.
  • the pressure relief part may be an explosion-proof valve, an explosion-proof plate, etc.
  • batteries which include a box and battery cells, and the box includes an upper shell and a lower shell.
  • the structural strength of the battery cells is poor, especially the structural strength of the battery cells with smaller sizes is poor, resulting in poor structural strength of the battery as a whole.
  • the battery cells are easily damaged by collision with adjacent components or the box.
  • the inventors have discovered that the structure of the battery can be improved to increase its structural strength.
  • the inventors after in-depth research, proposed a battery 1000, including multiple battery cells 10, the multiple battery cells 10 include: at least one first battery cell 11 and at least one second battery cell 12, the length of the first battery cell 11 is greater than the length of the second battery cell 12, and the first battery cell 11 is adjacent to and connected to the second battery cell 12.
  • the first battery cell 11 with a longer length has a higher structural strength
  • the second battery cell 12 with a shorter length has a lower structural strength.
  • the first battery cell 11 and the second battery cell 12 are connected so that the first battery cell 11 can enhance the structural strength of the second battery cell 12, thereby improving the overall structural strength of the battery 1000 and preventing the battery cell 10, especially the second battery cell 12, from being easily damaged by impact.
  • the overall structural strength of the battery 1000 can be improved without setting up an additional reinforcement structure, which is conducive to simplifying the structure of the battery 1000.
  • the battery 1000 disclosed in the embodiment of the present application can be used in, but not limited to, an electrical device 2000 such as a vehicle, a ship or an aircraft.
  • the power supply system of the electrical device 2000 composed of the battery 1000 disclosed in the present application can ensure the safety and reliability of the electrical device 2000.
  • the power-consuming device 2000 disclosed in the embodiment of the present application may be, but is not limited to, a vehicle, a mobile phone, a tablet, a laptop computer, a ship, a spacecraft, an electric toy, an electric tool, etc.
  • the vehicle may be a fuel vehicle, a gas vehicle, a new energy vehicle, or a rail vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle, etc.
  • the spacecraft includes an airplane, a rocket, a space shuttle, and a spacecraft, etc.
  • the electric toy includes a fixed or mobile electric toy, such as a game console, an electric vehicle toy, an electric ship toy, and an electric airplane toy, etc.
  • the electric tool includes a metal cutting electric tool, a grinding electric tool, an assembly electric tool, and a railway electric tool, such as an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact drill, a concrete vibrator, and an electric planer, etc.
  • the battery 1000 includes a plurality of battery cells 10.
  • the plurality of battery cells 10 include at least one first battery cell 11 and at least one second battery cell 12, wherein the length of the first battery cell 11 is greater than the length of the second battery cell 12.
  • the first battery cell 11 is adjacent to and connected to the second battery cell 12.
  • the plurality of battery cells 10 include at least one first battery cell 11 and at least one second battery cell 12. That is, the number of the battery cells 10 is two or more. When there are two battery cells 10, the two battery cells 10 are the first battery cell 11 and the second battery cell 12, respectively. When there are more than two battery cells 10, the number of the first battery cell 11 is one or more, and the number of the second battery cell 12 is one or more.
  • the length of the first battery cell 11 is greater than the length of the second battery cell 12.
  • the battery cell 10 has a length, a width and a thickness, and the length of the battery cell 10 is greater than the width, and the width is greater than the thickness.
  • the first battery cell 11 is longer than the second battery cell 12.
  • the length of the first battery cell 11 is greater than or equal to 140 mm, and the length of the second battery cell 12 is less than 140 mm.
  • the length, width and thickness of the battery cell 10 mentioned here refer to the size of the shell of the battery cell 10, and do not include the size of the protruding structures such as the electrical connection part 13 on the shell.
  • the first battery cell 11 and the second battery cell 12 are adjacent and connected. That is, no other battery cell 10 is arranged between the first battery cell 11 and the second battery cell 12 so that the two are adjacent.
  • the first battery cell 11 and the adjacent second battery cell 12 may be in contact with each other, or may be separated by a small gap. And the first battery cell 11 and the adjacent second battery cell 12 are connected together, so that the first battery cell 11 and the second battery cell 12 form a whole, thereby improving the structural strength of the second battery cell 12 through the first battery cell 11.
  • the length setting of the second battery cell 12 is more flexible, and it is not easy to have poor structural strength and easy damage by cooperating with the first battery cell 11, and it is easier to process, the pole piece polarization is small, and the second battery cell 12 has high power performance.
  • connection between the first battery cell 11 and the second battery cell 12 can improve the overall structural strength, so the additional reinforcement structure can be omitted, reducing the space occupied by the reinforcement structure, thereby improving the space utilization inside the battery 1000 and making the structure more compact.
  • the battery 1000 can also be provided with a reinforcement structure. By combining the reinforcement structure with the solution of connecting the long and short battery cells 10 of the embodiment of the present application, the overall structural strength of the battery 1000 can be further improved.
  • At least one first battery cell 11 is connected to the second battery cell 12; in the embodiment where there are multiple second battery cells 12, at least one second battery cell 12 is connected to the first battery cell 11, which are all within the protection scope of the present application.
  • the present application does not impose any special restrictions on the connection method between the first battery cell 11 and the second battery cell 12.
  • the two can be directly connected or connected through other components. For example, they are connected together by means of an adhesive layer, welding, fasteners, a mouth frame, etc.
  • the adhesive layer can bond the surfaces of the first battery cell 11 and the second battery cell 12 that are opposite to each other to achieve connection and fixation.
  • the fastener can fasten the shell of the first battery cell 11 to the shell of the second battery cell 12, or fasten the lug on the shell of the first battery cell 11 to the lug on the shell of the second battery cell 12, etc.
  • the mouth frame is annular and can surround and wrap the first battery cell 11 and the second battery cell 12 to achieve connection between the two.
  • the length of the first battery cell 11 is greater than the length of the second battery cell 12, and the first battery cell 11 is connected to the adjacent second battery cell 12, so that the strength of the second battery cell 12 and the overall structural strength of the battery 1000 can be improved, the stability and service life of the battery cell 10 are improved, the use safety and reliability of the battery 1000 are guaranteed, and it is conducive to improving the space utilization rate inside the battery 1000.
  • the size design of the second battery cell 12 along the second direction F2 is more flexible to meet the use requirements of different batteries 1000.
  • the number of the first battery cell 11 is one.
  • first battery cells 11 there are multiple first battery cells 11 and they constitute at least one first battery row 21 , and the first battery row 21 includes one first battery cell 11 or multiple first battery cells 11 stacked in the thickness direction.
  • the first battery row 21 includes one first battery cell 11 or a plurality of first battery cells 11 stacked in the thickness direction.
  • the plurality of first battery cells 11 are arranged adjacent to each other, they are stacked in the thickness direction of the first battery cells 11, so that the structure of the first battery row 21 is more compact, and the connection between the plurality of first battery cells 11 is more reliable, thereby further improving the structural strength.
  • the battery 1000 includes three first battery cells 11 , forming two first battery rows 21 , and second battery cells 12 are respectively disposed on both sides of each first battery row 21 , wherein one first battery row 21 includes one first battery cell 11 , and the other first battery row 21 includes two first battery cells 11 .
  • the battery 1000 includes four first battery cells 11 , and the four first battery cells 11 are stacked along their thickness direction to form a first battery row 21 .
  • FIGS. 1 to 8 there are multiple second battery cells 12, and the first battery cell 11 is connected to at least two second battery cells 12.
  • the first battery cell 11 is able to connect multiple second battery cells 12 into one, so as to further improve the structural strength of the battery 1000 and improve the impact resistance.
  • first battery cells 11 that is, a part of the first battery cells 11 may be connected to at least two second battery cells 12, and another part of the first battery cells 11 may be connected to only one second battery cell 12 or not connected to the second battery cell 12.
  • one first battery cell 11 is connected to four adjacent second battery cells 12, and the other three first battery cells 11 are not directly connected to the second battery cells 12, but are connected as a whole through the four first battery cells 11, so as to improve the structural strength of the first battery cell 11 connected to the second battery cell 12, thereby improving the overall structural strength of the battery 1000.
  • a plurality of second battery cells 12 constitute a plurality of second battery rows 22
  • each second battery row 22 includes a plurality of second battery cells 12 arranged along a length direction of the second battery cells 12 .
  • the battery 1000 may include one second battery row 22 or multiple second battery rows 22, and the number of second battery rows 22 and the number of second battery cells 12 included in each second battery row 22 may be adjusted to meet the voltage, capacitance, size and other requirements of different batteries 1000.
  • the multiple second battery rows 22 may be arranged along the width direction or thickness direction of the second battery cells 12 to meet the spatial arrangement requirements.
  • the first battery cell 11 can connect multiple second battery cells 12 of the same second battery row 22. That is, the first battery cell 11 connects multiple second battery cells 12 arranged along the length direction together, so that the second battery row 22 forms a whole, further improving the structural strength.
  • the first battery cell 11 connects at least two second battery rows 22. That is, the first battery cell 11 connects at least two second battery rows 22 into a whole, which can also further improve the structural strength.
  • the first battery cell 11 may be connected to a plurality of second battery cells 12 of the same second battery row 22 , and the first battery cell 11 is connected to at least two second battery rows 22 to further improve the overall strength of the battery 1000 .
  • the plurality of second battery rows 22 may be directly connected to each other, and the plurality of first battery cells 11 may be connected to each other as a whole, such as by an adhesive layer, to further improve the overall structural strength of the battery 1000 .
  • At least two second battery rows 22 are arranged along the first direction F1, the length direction of the second battery cell 12 is the second direction F2, and the first direction F1 is perpendicular to the second direction F2.
  • the first direction F1 may be parallel to the width direction or thickness direction of the second battery cell 12
  • at least two second battery rows 22 are stacked along the width direction or thickness direction of the second battery cell 12, so that the overall size of the battery 1000 in the three-dimensional direction is more reasonable, which is conducive to improving the space utilization rate inside the battery 1000.
  • the length direction of at least one first battery cell 11 is parallel to the first direction F1 , and the at least one first battery cell 11 is located between two adjacent second battery cells 12 in the second battery row 22 .
  • At least one first battery cell 11 can extend along the arrangement direction of the plurality of second battery rows 22 , and the first battery cell 11 can separate two second battery cells 12 of the second battery row 22 , and the two sides of the first battery cell 11 can be connected to the two second battery cells 12 respectively.
  • the first battery cell 11 can connect two second battery cells 12 of the same second battery row 22 together in the second direction F2 to form a three-layer structure of the second battery cell 12-first battery cell 11-second battery cell 12, and can connect multiple second battery rows 22 together in the first direction F1, thereby making the overall structure of the entire battery cell 10 in the first direction F1 and the second direction F2 more stable.
  • the length directions of the first battery cell 11 and the second battery cell 12 are perpendicular to each other, that is, different arrangements are adopted to increase the overall rigidity of the battery 1000.
  • the number of second battery rows 22 arranged along the first direction F1 is M, and the length of the first battery cell 11 is greater than the sum of the dimensions of M ⁇ 1 second battery rows 22 along the first direction F1 .
  • two adjacent second battery cells 12 of each second battery row 22 are separated by the first battery cell 11 and connected through the first battery cell 11, ensuring that the first battery cell 11 can realize the connection of the M second battery rows 22, and also ensuring that the second battery cells 12 inside the M second battery rows 22 can be connected, and the battery 1000 has higher integrity.
  • the thickness direction of the first battery cell 11 is parallel to the second direction F2, so that when the first battery cell 11 separates two adjacent second battery cells 12, the surface with a larger area on one side of the thickness direction of the first battery cell 11 cooperates with the second battery cell 12, so that the support and limitation of the second battery cell 12 is more reliable, and the first battery cell 11 occupies less space in the second direction F2.
  • the thickness direction of the second battery cell 12 can be parallel to the first direction F1. That is, the plurality of second battery rows 22 are stacked along the thickness direction of the second battery cell 12, so that the arrangement of the plurality of second battery rows 22 is compact, and the occupied space in the first direction F1 is reduced. And the width direction of the second battery cell 12 is along the third direction F3, which can reduce the thickness of the battery 1000 as a whole along the third direction F3. Both the first direction F1 and the second direction F2 are perpendicular to the third direction F3. In addition, the thickness directions of the first battery cell 11 and the second battery cell 12 are also perpendicular to each other, which can further improve the overall rigidity.
  • the thickness direction of the second battery cell 12 is parallel to the third direction F3, and the first direction F1 and the second direction F2 are both perpendicular to the third direction F3.
  • At least two second battery rows 22 are stacked along the third direction F3 and are both connected to adjacent first battery cells 11. That is, the second battery row 22 can form a multi-layer structure in the third direction F3, so that the overall thickness of the battery 1000 can be adjusted by adjusting the number of layers of the second battery row 22.
  • two layers of the second battery row 22 can be connected through the first battery cell 11 to form a whole, so as to improve the overall stiffness.
  • the width directions of the first battery cell 11 and the second battery cell 12 are also perpendicular to each other, which can further improve the overall stiffness.
  • the length direction of the second battery cell 12 is the second direction F2.
  • the length direction of at least one first battery cell 11 is parallel to the second direction F2, that is, the first battery cell 11 and the second battery cell 12 are arranged parallel to each other.
  • first battery cell 11 and the second battery row 22 are stacked and connected along the first direction F1 or the third direction F3, and the first direction F1, the second direction F2 and the third direction F3 are perpendicular to each other.
  • first battery cell 11 and the second battery row 22 form a multi-layer structure to improve the overall rigidity.
  • the first battery cell 11 can connect the plurality of second battery cells 12 included in the second battery row 22 together to improve the structural strength inside the second battery row 22.
  • the second battery row 22 includes N second battery cells 12 , that is, the N second battery cells 12 are arranged in a row along the second direction F2 .
  • the length of the first battery cell 11 is greater than the sum of the lengths of the N ⁇ 1 second battery cells 12 .
  • each second battery cell 12 can be connected to the same first battery cell 11, so as to ensure that the first battery cell 11 can connect the second battery row 22 into one.
  • the length of the first battery cell 11 is greater than or equal to the sum of the lengths of the N second battery cells 12
  • the connection lengths of the N second battery cells 12 with the first battery cell 11 are equal, and are equal to the length of the second battery cell 12, so as to ensure the connection uniformity of the N second battery cells 12.
  • At least two second battery rows 22 are provided on the same side of the first battery cell 11 along the first direction F1, and at least two second battery rows 22 are stacked along the third direction F3.
  • the same side of the first battery cell 11 is adjacent to at least two second battery rows 22, and the first battery cell 11 can be connected to all adjacent second battery rows 22, so as to connect the multiple second battery rows 22 on the same side into one body, thereby improving the overall rigidity.
  • At least one side of the first battery cell 11 along the first direction F1 and at least one side along the third direction F3 are respectively provided with a second battery row 22. That is, both sides of the first battery cell 11 are respectively adjacent to the second battery rows 22, and the first battery cell 11 can be connected to all adjacent second battery rows 22, so as to connect the multiple second battery rows 22 located on both sides together to improve the overall rigidity.
  • one or more stacked second battery rows 22 may be provided on the same side of the first direction F1 of the first battery cell 11, and one or more stacked second battery rows 22 may be provided on the same side of the third direction F3 of the first battery cell 11.
  • the first battery cell 11 can be connected to multiple second battery rows 22 from both sides respectively, and then more second battery rows 22 can be connected together to further improve the overall rigidity.
  • one side of the first battery cell 11 along the first direction F1 is connected to a second battery row 22, and one side of the first battery cell 11 along the third direction F3 is connected to a second battery row 22.
  • one side of the first battery cell 11 along the first direction F1 is connected to two second battery rows 22, and the two second battery rows 22 are stacked along the third direction F3.
  • the thickness direction of the second battery cell 12 and the thickness direction of the first battery cell 11 may be parallel or perpendicular to each other.
  • the thickness direction of the second battery cell 12 is parallel to the thickness direction of the first battery cell 11, so that the first battery cell 11 and the second battery cell 12 are stacked and arranged in a compact structure and occupy a small space.
  • the pressure relief portion 14 it is convenient to arrange the pressure relief portion 14 on a narrow surface that is not easily deformed (such as a surface on one side along the width direction), so that the pressure relief portion 14 can be installed reliably and not easily deformed, and can also avoid pressure relief toward the adjacent battery cell 10 to cause chain thermal runaway.
  • the thickness direction of the second battery cell 12 is perpendicular to the thickness direction of the first battery cell 11 , so that the first battery cell 11 and the second battery cell 12 are arranged in different directions, thereby increasing the overall rigidity of the battery 1000 .
  • electrical connection parts 13 are respectively provided on both sides of the length direction of the first battery cell 11, such as positive electrode terminals and negative electrode terminals are respectively provided on both sides. Electrical connection parts 13 are respectively provided on both sides of the length direction of the second battery row 22, and the electrical connection parts 13 located on the same side of the second battery row 22 can be one or two.
  • the electrical connection portion 13 on one side of the second battery row 22 is connected to one of the electrical connection portions 13 of the first battery cell 11 through an electrical connection member.
  • the electrical connection portion 13 on the other side of the second battery row 22 is connected to another electrical connection portion 13 of the first battery cell 11 through an electrical connection member.
  • the electrical connection member is used to realize the electrical connection of the two electrical connection portions 13, for example, the electrical connection member can be a busbar.
  • the electrical connection part 13 on one side of the second battery row 22 is connected to one of the electrical connection parts 13 of the first battery cell 11 through an electrical connection piece.
  • the electrical connection part 13 on the other side of the second battery row 22 is connected to another electrical connection part 13 of the first battery cell 11 through an electrical connection piece.
  • the first battery cell 11 itself plays the role of electrical connection transfer, and the electrical connection of the electrical connection parts 13 on both sides of the second battery row 22 can be achieved without the need to set up additional components such as busbars.
  • the busbar needs to extend from one side to the other side along the second direction F2, and be stacked with the second battery row 22 in the first direction F1 or the third direction F3 to occupy additional space. Therefore, by using the first battery cell 11 with a longer length for switching, the space for setting up a busbar is saved, the space utilization rate inside the battery 1000 is improved, and it is conducive to reducing the size of the battery 1000. In addition, the number of components is reduced, and the cost is reduced.
  • the electrical connection parts 13 of the multiple second battery rows 22 on the same side can be electrically connected by an electrical connector to achieve series or parallel connection of the multiple second battery rows 22.
  • the electrical connector does not need to span the second battery rows 22 along the second direction F2, which can reduce the space occupied in the first direction F1 and the third direction F3, and the size of the electrical connector is small, making the structure compact and improving space utilization.
  • the electrical connection portion 13 of the second battery row 22 is also flexibly configured.
  • the second battery row 22 includes two second battery cells 12, and the two second battery cells 12 are provided with an electrical connection portion 13 on the sides away from each other. That is, the positive electrode terminal and the negative electrode terminal of each second battery cell 12 are provided on the same side, and are provided on the sides away from each other of the two second battery cells 12. This allows the positive electrode terminal and the negative electrode terminal to be electrically connected and dissipated from the same side, share the installation space and the heat dissipation space, and make the structure more compact.
  • the second battery row 22 includes at least two second battery cells 12, and each second battery cell 12 is provided with electrical connection parts 13 on both sides of the length direction, for example, a positive electrode terminal and a negative electrode terminal are provided on both sides.
  • the electrical connection parts 13 of two adjacent second battery cells 12 facing each other are connected, for example, directly welded, or electrically connected through an adapter, etc.
  • the electrical connection parts 13 of the two second battery cells 12 in the same second battery row 22 can be directly connected.
  • it can support the two second battery cells 12 in the second direction F2, which is beneficial to improve the overall structural strength of the second battery row 22, and can also omit the busbars, adapters and other structures, which is beneficial to save space;
  • it can realize the electrical connection of the two second battery cells 12, thereby realizing the series or parallel connection of the battery cells 10 in the same second battery row 22, and the electrical connection structure is located in the middle of the battery 1000, which can prevent the electrical connection structure from being directly hit during a side collision.
  • the battery cell 10 can be a hard-shell battery cell or a soft-pack battery cell.
  • the electrode terminals of the hard-shell battery cell are columnar structures with high strength, which can directly offset each other and take into account the supporting and limiting functions.
  • the electrode terminals of the soft-pack battery cell can be sheet-shaped structures, and the relative electrode terminals can be stacked for direct connection, which takes up less space.
  • the number of the second battery cells 12 may be 2 to 5, so as to avoid an excessively large overall size of the battery 1000 due to an excessive number of second battery cells 12 .
  • At least one battery cell 10 is a battery cell without a discharge platform.
  • each 5% discharge capacity is a value point, and the slope of the line connecting two adjacent value points is greater than or equal to 1.
  • the discharge curve is a test curve of voltage (OCV) and discharge capacity (SOC) during the discharge process of the battery cell 10 .
  • each 5% discharge capacity is a value point, and the slope of the line connecting two adjacent value points in the discharge curve is greater than or equal to 1.
  • Each 5% discharge capacity is a value point, that is, 5%, 10%, 15%, 20%...85%, 90% and 95% discharge capacity are all used as value points.
  • the line connecting two adjacent value points for example, on the discharge curve, is a line segment obtained by connecting the value point corresponding to 5% discharge capacity and the value point corresponding to 10% discharge capacity.
  • connection line The greater the slope of the connection line, the faster the voltage changes during discharge, and the easier it is to identify the relationship between SOC and OCV, so that it is easy to determine the current SOC of the battery cell 10 based on the detected OCV.
  • the slope of the connection line is smaller, the discharge curve will form a discharge platform, that is, within a certain SOC range, the corresponding OCV is close, making it difficult to determine the actual SOC of the battery cell 10 based on the detected OCV.
  • the discharge curve has an obvious SOC curve curvature, and it is considered that the discharge curve of the battery cell 10 does not have a discharge platform, and the corresponding battery cell 10 is a battery cell without a discharge platform; when the slope of the line connecting two adjacent value points is less than 1, the discharge curve has an obvious platform curve, and it is considered that the discharge curve of the battery cell 10 has a discharge platform, and the corresponding battery cell 10 is a battery cell with a discharge platform.
  • At least one battery cell 10 is a battery cell without a discharge platform, so that there is no discharge platform in the overall discharge curve of the battery 1000. Therefore, during the use of the battery 1000, the discharge capacity of the battery 1000 can be accurately determined according to the detection voltage, that is, the remaining power can be accurately determined to avoid a sudden drop in power.
  • At least one battery cell 10 is a battery cell with a discharge platform, and the slope of the discharge connection line between two adjacent value points in the discharge curve of the battery cell with the discharge platform is less than 1.
  • battery 1000 cooperates with battery cells with a discharge platform and battery cells without a discharge platform.
  • the battery cells without a discharge platform can improve the detection accuracy of the discharge capacity, and the battery cells with a discharge platform can increase the capacity, thereby improving the endurance of battery 1000.
  • the first battery cell 11 is a battery cell with a discharge platform
  • the second battery cell 12 is a battery cell without a discharge platform.
  • a battery cell with a discharge platform is safer, and the first battery cell 11 with a longer length adopts a safer battery cell with a discharge platform, which is more conducive to ensuring the safety and stability of the first battery cell 11, and ensuring that the first battery cell 11 can provide more reliable structural stability for the second battery cell 12 and the entire battery 1000.
  • the thermal runaway temperature thresholds of at least two battery cells 10 are not equal.
  • the thermal runaway temperature threshold that is, when the temperature is lower than the threshold, the battery cell 10 will not experience thermal runaway, and when it is higher than the value, the risk of thermal runaway is extremely high.
  • the temperature is lower than the thermal runaway temperature threshold of the battery cell 10 with a higher thermal runaway temperature threshold, that is, the battery cell 10 with a higher thermal runaway temperature threshold will not experience thermal runaway at this temperature, so as to form a thermal insulation barrier to avoid rapid diffusion of heat during thermal runaway.
  • the battery cells 10 with lower thermal runaway temperatures may be located on both sides of the battery cells 10 with higher thermal runaway temperatures, thereby isolating the battery cells 10 with lower thermal runaway temperatures to avoid a thermal runaway chain reaction.
  • the thermal runaway temperature threshold of the first battery cell 11 is higher than the thermal runaway temperature threshold of the second battery cell 12. That is, the first battery cell 11 with a longer length is less likely to have thermal runaway than the second battery cell 12 with a shorter length.
  • the first battery cell 11 has higher stability and safety, can ensure a more reliable structural reinforcement effect, and also meet the processing requirements of larger sizes, reducing the difficulty of processing.
  • the longer length has a better heat blocking effect and a better effect of preventing the spread of thermal runaway.
  • the difference in thermal runaway temperature thresholds between a battery cell 10 with a higher thermal runaway temperature threshold and a battery cell 10 with a lower thermal runaway temperature threshold is greater than or equal to 20°C, so as to avoid the temperature reaching the thermal runaway temperature threshold of the battery cell 10 with a higher thermal runaway temperature threshold due to heat accumulation, thereby avoiding further spread of thermal runaway.
  • the first battery cell 11 is a lithium iron phosphate battery cell (LFP battery cell)
  • the second battery cell 12 is a ternary battery cell (such as a nickel manganese cobalt NCM battery cell, etc.).
  • the discharge curve of the lithium iron phosphate battery cell has a clear discharge platform, and the discharge curve of the ternary system has a clear curve curvature.
  • the thermal runaway temperature threshold of the lithium iron phosphate battery cell is higher than that of the ternary battery cell, and the safety is higher.
  • the capacity of the ternary battery cell is better and the endurance is stronger.
  • the combination of the two can not only improve the detection accuracy of the discharge capacity, but also improve the endurance of the battery 1000, and also improve the overall safety and reliability of the battery 1000.
  • the first battery cell 11 only needs one specification
  • the second battery cell 12 only needs one specification, so as to avoid assembly errors caused by different chemical systems of battery cells 10 with the same appearance.
  • the battery cell 10 is provided with a pressure relief portion 14 and an electrical connection portion 13.
  • the pressure relief portion 14 is used to release the internal substances (e.g., gas, liquid, particulate matter, etc.) of the battery cell 10 to reduce the internal pressure of the battery cell 10 and avoid the internal pressure of the battery cell 10 being too quickly pressurized, which may lead to dangerous accidents such as explosion of the battery cell 10.
  • the pressure relief portion 14 may be an explosion-proof valve, an explosion-proof plate, etc.
  • the pressure relief portion 14 and the electrical connection portion 13 are arranged on different sides of the battery cell 10. This is beneficial to ensure that there is a large distance between the electrical connection portion 13 and the pressure relief portion 14 of the battery cell 10, so as to effectively avoid the problems such as insulation failure, high voltage ignition, fire and explosion caused by the conductive particles in the discharge discharged by the battery cell 10 through its own pressure relief portion 14 flowing to its own electrical connection portion 13 in the case of thermal runaway.
  • the battery cell 10 has two first surfaces opposite to each other along the length direction, two second surfaces opposite to each other along the width direction, and two third surfaces opposite to each other along the thickness direction.
  • the two electrical connection parts 13 of the first battery cell 11 are respectively arranged on the two first surfaces, and the pressure relief part 14 is arranged on one of the second surfaces.
  • the two electrical connection parts 13 of the second battery cell 12 are arranged on the same first surface, and the pressure relief part 14 is arranged on one of the second surfaces.
  • the electrical connection part 13 and the pressure relief part 14 are respectively located on the adjacent sides of the battery cell 10, so that there is a certain safety distance between the electrical connection part 13 and the pressure relief part 14, reducing the impact of the emissions discharged by the pressure relief part 14 on the electrical connection part 13, and improving the safety and reliability of the battery 1000.
  • the pressure relief part 14 is arranged on the narrow surface of the battery cell 10, and the narrow surface is not easy to deform, which can ensure the installation stability of the pressure relief part 14.
  • the two electrical connection parts 13 of the second battery cell 12 are arranged on one of the first surfaces, and the pressure relief part 14 is arranged on the other first surface.
  • the pressure relief part 14 and the electrical connection part 13 are respectively arranged on the two opposite sides of the battery cell 10.
  • the pressure relief portion 14 of the first battery cell 11 is disposed on the second surface.
  • the width direction of the first battery cell 11 is parallel to the third direction F3, and the first battery cell 11 is a single layer in the third direction F3; or, the first battery cell 11 is located on the same side of all the second battery cells 12 in the first direction F1, the width direction of the first battery cell 11 is parallel to the first direction F1, and the pressure relief portion 14 is disposed on the second surface of the first battery cell 11 facing away from the second battery cell 12.
  • the pressure relief portion 14 of the second battery cell 12 is arranged on the second surface, the width direction of the second battery cell 12 is parallel to the third direction F3, and the second battery cell 12 is a single layer in the third direction F3; or, the pressure relief portion 14 of the second battery cell 12 is arranged on the first surface, the first surfaces of the pressure relief portions 14 of two adjacent second battery cells 12 of the same second battery row 22 are opposite, and a beam body is arranged between the two second battery cells 12, the beam body has a heat dissipation channel, and the pressure relief portion 14 erupts toward the heat dissipation channel to discharge the high-temperature gas through the heat dissipation channel.
  • the second surface of the first battery cell 11 provided with the pressure relief portion 14 is not opposite to the other battery cells 10, and the surface of the second battery cell 12 provided with the pressure relief portion 14 is not directly opposite to the other battery cells 10.
  • the pressure relief portion 14 does not spray toward any electrical connection portion 13, nor does it spray toward the shells of other battery cells 10, thereby effectively ensuring that the electrical connection portion 13 of each battery cell 10 is not affected by the emissions discharged from other battery cells 10, thereby ensuring the safety and reliability of the battery 1000.
  • the electric device 2000 according to the second embodiment of the present application includes the battery 1000 according to the first embodiment of the present application, and the battery 1000 is used to provide electric energy for the electric device 2000. Therefore, by using the above battery 1000, it is beneficial to improve the safety and reliability of the electric device 2000.
  • the battery 1000 when the battery 1000 is used in a vehicle, the battery 1000 may be disposed at the bottom, head, or tail of the vehicle.
  • the battery 1000 may be used to power the vehicle, for example, the battery 1000 may be used as an operating power source for the vehicle.
  • the vehicle may further include a controller and a motor, and the controller is used to control the battery 1000 to power the motor, for example, for starting, navigating, and operating power requirements of the vehicle during driving.
  • the battery 1000 is arranged on the chassis of the vehicle.
  • the battery 1000 includes a housing 40 and a plurality of battery cells 10 arranged in the housing 40, and the plurality of battery cells 10 include a first battery cell 11 and a second battery cell 12.
  • the length of the first battery cell 11 is greater than the length of the second battery cell 12, and the widths of the first battery cell 11 and the second battery cell 12 are equal, and the thicknesses are equal.
  • the first battery cell 11 is an LFP battery cell, and its discharge curve has an obvious discharge platform, and the thermal runaway temperature threshold is relatively high.
  • the second battery cell 12 is an NCM battery cell, and its discharge curve has an obvious curve curvature, and the thermal runaway temperature threshold is relatively low.
  • a positive electrode terminal and a negative electrode terminal are respectively provided on both sides of the length direction of the first battery cell 11.
  • the third direction F3 is a vertical direction
  • the first direction F1 is a horizontal direction
  • the second direction F2 is a horizontal direction.
  • the thickness direction of the battery cell 10 is parallel to the third direction F3, it means that the battery cell 10 adopts a flat design; when the width direction of the battery cell 10 is parallel to the third direction F3, it means that the battery cell 10 adopts an upright design.
  • 64 second battery cells 12 constitute 32 second battery rows 22 arranged along the first direction F1
  • each second battery row 22 includes two second battery cells 12 arranged along the second direction F2, so that the 64 second battery cells 12 form two rows distributed front and back.
  • Each second battery cell 12 is designed to be upright and its thickness direction is parallel to the first direction F1.
  • a first battery cell 11 is designed to be upright, with its length direction parallel to the first direction F1 and its thickness direction parallel to the second direction F2.
  • the first battery cell 11 is located between the front and rear rows of second battery cells 12, acting as a barrier during thermal runaway, separating the second battery cells 12 with lower thermal runaway temperatures to avoid rapid heat diffusion during thermal runaway; it also acts as a reinforcing beam, greatly improving the rigidity of the entire battery 1000.
  • the difference from the first embodiment is that the length direction of the first battery cell 11 is parallel to the second direction F2 and the thickness direction is parallel to the first direction F1.
  • the first battery cell 11 is stacked with 32 second battery rows 22 along the first direction F1, so that the first battery cell 11 can connect two second battery cells 12 of adjacent second battery rows 22 together, which has a structural reinforcement effect.
  • the first battery cell 11 has electrode terminals on both sides, and the second battery cell 12 has dual electrode terminals on one side, so that the first battery cell 11 plays the role of current diversion.
  • each first battery row 21 is located between two adjacent second battery rows 22.
  • Each second battery row 22 includes three second battery cells 12 arranged along the second direction F2, each second battery cell 12 has electrode terminals on both sides, and any two adjacent second battery cells 12 are connected by electrode terminals to electrode terminals.
  • the first battery cell 11 and the second battery cell 12 are both designed to lie flat and the length direction is parallel to the second direction F2.
  • 34 second battery cells 12 constitute 17 second battery rows 22, of which 16 second battery rows 22 are arranged in two layers along the third direction F3, each layer includes 8 second battery rows 22 arranged along the first direction F1, and the 17th second battery row 22 is stacked with the first battery cell 11 along the third direction F3 and is located on one side of the above-mentioned 16 second battery rows 22 along the first direction F1.
  • the first battery cell 11 is designed to be upright and its length direction is parallel to the second direction F2
  • the second battery cell 12 is designed to be flat and its length direction is parallel to the second direction F2.
  • 32 second battery cells 12 constitute 16 second battery rows 22, and the 16 second battery rows 22 are arranged in two layers along the third direction F3, and each layer includes 8 second battery rows 22 arranged along the first direction F1.
  • Four first battery cells 11 are stacked along the first direction F1, and are all located on the same side of the above-mentioned 16 second battery rows 22 along the first direction F1.
  • the same as the fourth embodiment is that the first battery cell 11 and one second battery row 22 are stacked along the third direction F3, and the difference is that the remaining second battery rows 22 are all upright and stacked along the first direction F1.
  • the overall strength and stability of the battery 1000 can be increased, and damage to the battery cells 10 can be prevented to avoid safety risks.

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  • Chemical Kinetics & Catalysis (AREA)
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  • Battery Mounting, Suspending (AREA)

Abstract

一种电池(1000)及用电装置(2000)，电池(1000)包括多个电池单体(10)，多个电池单体(10)包括：至少一个第一电池单体(11)和至少一个第二电池单体(12)，第一电池单体(11)的长度大于第二电池单体(12)的长度，且第一电池单体(11)与第二电池单体(12)相邻且相连。

Description

电池及用电装置 技术领域
本申请涉及电池技术领域，具体而言，涉及一种电池及用电装置。
背景技术
相关技术中，电池的结构强度差，在电池发生碰撞等情况时，容易造成结构损坏。
发明内容
本申请实施例提供一种电池及用电装置，提高了整体结构强度，防止电池单体受撞击损坏。
第一方面，本申请实施例提供一种电池，包括多个电池单体，所述多个电池单体包括：至少一个第一电池单体和至少一个第二电池单体，所述第一电池单体的长度大于所述第二电池单体的长度，且所述第一电池单体与所述第二电池单体相邻且相连。
在上述技术方案中，通过第一电池单体的长度大于第二电池单体的长度，且第一电池单体与相邻的第二电池单体相连，可以提高第二电池单体的强度，以及电池的整体结构强度，提高了电池单体的稳定性和使用寿命，保证了电池的使用安全性和可靠性，同时有利于提高电池内部的空间利用率。并且，第二电池单体的长度尺寸设计更灵活，以满足不同电池的使用需求。
在一些实施例中，所述第一电池单体为多个且构成至少一个第一电池排，所述第一电池排包括一个所述第一电池单体或沿厚度方向层叠布置的多个所述第一电池单体。在上述技术方案中，使第一电池排结构更紧凑，也使多个第一电池单体之间连接更可靠，进一步提高结构强度。
在一些实施例中，所述第二电池单体为多个，所述第一电池单体与至少两个所述第二电池单体相连。在上述技术方案中，以进一步提高整体结构强度。
在一些实施例中，多个所述第二电池单体构成多个第二电池排，每个所述第二电池排包括沿所述第二电池单体的长度方向排布的多个所述第二电池单体；所述第一电池单体连接同一所述第二电池排的多个所述第二电池单体；和/或，所述第一电池单体连接至少两个所述第二电池排。在上述技术方案中，便于满足不同电池单体的排布和强度需求。
在一些实施例中，至少两个所述第二电池排沿第一方向排布，所述第二电池单体的长度方向为第二方向，所述第一方向与所述第二方向垂直，至少一个所述第一电池单体的长度方向平行于所述第一方向，且位于所述第二电池排中相邻两个所述第二电池单体之间。在上述技术方案中，以进一步提高整体结构强度。
在一些实施例中，沿所述第一方向排布的所述第二电池排的数量为M，所述第一电池单体的长度大于M-1个所述第二电池排沿所述第一方向的尺寸之和。在上述技术方案中，保证第二电池排的所有第二电池单体均能与所述第一电池单体连接。
在一些实施例中，所述第一电池单体的厚度方向平行于所述第二方向，其中，所述第二电池单体的厚度方向平行于所述第一方向；或者，所述第二电池单体的厚度方向平行于第三方向，所述第一方向和所述第二方向均与所述第三方向垂直，至少两个所述第二电池排沿所述第三方向层叠布置且均与相邻所述第一电池单体相连。在上述技术方案中，第一电池单体和第二电池单体排布方向不同，以进一步提高整体刚度。
在一些实施例中，所述第二电池单体的长度方向为第二方向，至少一个所述第一电 池单体的长度方向平行于所述第二方向，且所述第一电池单体与所述第二电池排沿第一方向或第三方向层叠布置且相连，所述第一方向、所述第二方向和所述第三方向两两垂直。在上述技术方案中，第一电池单体可以连接同一第二电池排的多个第二电池单体以提高第二电池排内部的结构强度。
在一些实施例中，所述第二电池排包括N个所述第二电池单体，所述第一电池单体的长度大于N-1个所述第二电池单体的长度之和。在上述技术方案中，保证每个第二电池单体均能与第一电池单体连接。
在一些实施例中，所述第一电池单体沿所述第一方向的同一侧设有至少两个所述第二电池排，且所述至少两个第二电池排沿所述第三方向层叠布置；和/或，所述第一电池单体沿所述第一方向的至少一侧和沿所述第三方向的至少一侧分别设有所述第二电池排。在上述技术方案中，第一电池单体能够连接至少两个第二电池排，以进一步提高整体刚度。
在一些实施例中，所述第二电池单体的厚度方向与所述第一电池单体的厚度方向相互平行或相互垂直。在上述技术方案中，第一电池单体与第二电池单体的排布紧凑，或者采用不同排布方式以提高整体刚度。
在一些实施例中，所述第一电池单体长度方向的两侧分别设有电连接部，所述第二电池排长度方向的两侧分别设有电连接部，所述第二电池排一侧的所述电连接部和所述第一电池单体的其中一个所述电连接部通过电连接件相连；所述第二电池排另一侧的所述电连接部和所述第一电池单体的另一个所述电连接部通过电连接件相连。在上述技术方案中，第一电池单体起到电连接转接作用，以利于省去汇流片等额外的转接结构。
在一些实施例中，所述第二电池排包括两个所述第二电池单体，两个所述第二电池单体的彼此远离侧设有所述电连接部；或者，所述第二电池排包括至少两个所述第二电池单体，每个所述第二电池单体长度方向的两侧分别设有所述电连接部，相邻两个所述第二电池单体彼此相对的所述电连接部相连。在上述技术方案中，第二电池排的多个第二电池单体之间相互支撑，以提高整体刚度。
在一些实施例中，至少一个所述电池单体为无放电平台的电池单体，所述无放电平台的电池单体的放电曲线中，在5％～95％放电容量区间内，每个5％放电容量为取值点，相邻两个所述取值点的连线斜率大于或等于1。在上述技术方案中，利用无放电平台的电池单体可以提高电量检测准确性。
在一些实施例中，至少一个所述电池单体为有放电平台的电池单体，所述有放电平台的电池单体的放电曲线中相邻两个所述取值点的连线斜率小于1。在上述技术方案中，利用有放电平台的电池单体，可以提高电池的续航能力。
在一些实施例中，所述第一电池单体为有放电平台的电池单体，所述第二电池单体为无放电平台的电池单体。在上述技术方案中，兼顾了安全性、电量检测准确性和续航能力。
在一些实施例中，至少两个所述电池单体的热失控温度阈值不相等。在上述技术方案中，热失控温度阈值较高的电池单体可以作为隔热屏障，防止热失控扩散。
在一些实施例中，所述第一电池单体的热失控温度阈值高于所述第二电池单体的热失控温度阈值。在上述技术方案中，第一电池单体的安全性更高，有利于降低加工难度，且防止热失控扩散的效果更好。
在一些实施例中，所述第一电池单体为磷酸铁锂电池单体，所述第二电池单体为三元电池单体。在上述技术方案中，兼顾了安全性、电量检测准确性和续航能力。
在一些实施例中，所述电池单体设有泄压部和电连接部，所述泄压部与所述电连接部设于所述电池单体的不同侧。在上述技术方案中，避免热失控泄压时导致电连接部温度过高产生起火爆炸。
第二方面，本申请实施例还提供一种用电装置，包括上述的电池，所述电池用于为 所述用电装置提供电能。
附图说明
图1为本申请第一实施例的电池沿第三方向的视图；
图2为本申请第二实施例的电池沿第三方向的视图；
图3为图2沿第二方向的视图；
图4为本申请第三实施例的电池沿第三方向的视图；
图5为本申请第四实施例的电池沿第三方向的视图；
图6为图5沿第二方向的视图；
图7为本申请第五实施例的电池沿第三方向的视图；
图8为图7沿第二方向的视图；
图9-图11是本申请三个实施例的电池单体的示意图；
图12为本申请一些实施例的用电装置的示意图。
附图标记：
电池1000；用电装置2000；
电池单体10；第一电池单体11；第二电池单体12；电连接部13；泄压部14；
第一电池排21；第二电池排22；
箱体40；
第一方向F1；第二方向F2；第三方向F3。
具体实施方式
为使本申请实施例的目的、技术方案和优点更加清楚，下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚地描述，显然，所描述的实施例是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
除非另有定义，本申请所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同；本申请中在申请的说明书中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本申请；本申请的说明书和权利要求书及上述附图说明中的术语“包括”和“具有”以及它们的任何变形，意图在于覆盖不排他的包含。本申请的说明书和权利要求书或上述附图中的术语“第一”、“第二”等是用于区别不同对象，而不是用于描述特定顺序或主次关系。
在本申请中提及“实施例”意味着，结合实施例描述的特定特征、结构或特性可以包含在本申请的至少一个实施例中。在说明书中的各个位置出现该短语并不一定均是指相同的实施例，也不是与其它实施例互斥的独立的或备选的实施例。
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”、“附接”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，可以根据具体情况理解上述术语在本申请中的具体含义。
本申请中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本申请中字符“/”，一般表示前后关联对象是一种“或”的关系。
在本申请的实施例中，相同的附图标记表示相同的部件，并且为了简洁，在不同实施例中，省略对相同部件的详细说明。应理解，附图示出的本申请实施例中的各种部件的厚度、长宽等尺寸，以及集成装置的整体厚度、长宽等尺寸仅为示例性说明，而不应对本申请构成任何限定。
本申请中出现的“多个”指的是两个以上(包括两个)。
本申请中，电池是指包括一个或多个电池单体以提供更高的电压和容量的单一的物理模块。例如，本申请中所提到的电池可以包括电池模组或电池包等。一些电池可以包括用于封装一个或多个电池单体或多个电池模组的箱体。箱体可以避免液体或其他异物影响电池单体的充电或放电。当然，还有一些电池可以不包括上述箱体，直接设置在用电装置的电池安装舱内。
本申请中，电池单体可以包括锂离子二次电池、锂离子一次电池、锂硫电池、钠锂离子电池、钠离子电池或镁离子电池等，本申请实施例对此并不限定。电池单体可呈圆柱体、扁平体、长方体或其它形状等，本申请实施例对此也不限定。电池单体一般按封装的方式分成三种：柱形电池单体、方形电池单体和软包电池单体，本申请实施例对此也不限定。
例如，电池单体可以包括壳体、电极组件和电解液，壳体用于容纳电极组件和电解液。电极组件由正极极片、负极极片和隔离膜组成。电池单体主要依靠金属离子在正极极片和负极极片之间移动来工作。正极极片包括正极集流体和正极活性物质层，正极活性物质层涂覆于正极集流体的表面，未涂敷正极活性物质层的正极集流体凸出于已涂覆正极活性物质层的正极集流体，未涂敷正极活性物质层的正极集流体作为正极极耳。以锂离子电池为例，正极集流体的材料可以为铝，正极活性物质可以为钴酸锂、磷酸铁锂、三元锂或锰酸锂等。
负极极片包括负极集流体和负极活性物质层，负极活性物质层涂覆于负极集流体的表面，未涂敷负极活性物质层的负极集流体凸出于已涂覆负极活性物质层的负极集流体，未涂敷负极活性物质层的负极集流体作为负极极耳。负极集流体的材料可以为铜，负极活性物质可以为碳或硅等。为了保证通过大电流而不发生熔断，正极极耳的数量为多个且层叠在一起，负极极耳的数量为多个且层叠在一起。
隔离膜的材质可以为PP(polypropylene，聚丙烯)或PE(polyethylene，聚乙烯)等。此外，电极组件可以是卷绕式结构，也可以是叠片式结构，本申请实施例并不限于此。
电池单体上可以设置电极端子等与极耳相连，作为电池单体的电连接部。并且，电池单体上可以具有泄压部，在电池单体内压过大(例如热失控)时，泄压部用于释放电池单体内部物质(例如气体、液体、颗粒物等)，以降低电池单体的内部压力，避免电池单体内部过快加压，而导致电池单体爆燃等危险事故。例如，泄压部可以为防爆阀、防爆片等等。
例如，一些相关技术中的用电装置，采用电池进行供电，电池包括箱体和电池单体，箱体包括上壳和下壳。电池单体的结构强度较差，尤其是尺寸较小的电池单体的结构强度较差，导致电池整体的结构强度较差。例如在发生碰撞时，致电池单体与相邻部件或者箱体容易发生碰撞而损坏。
为了避免电池单体结构强度差的问题，发明人发现，可以对电池的结构进行改进，以提高其结构强度。
基于此，发明人经过深入研究，提出了一种电池1000，包括多个电池单体10，多个电池单体10包括：至少一个第一电池单体11和至少一个第二电池单体12，第一电池单体11的长度大于第二电池单体12的长度，且第一电池单体11与第二电池单体12相邻且相连。
在上述这种结构的电池1000中，长度较长的第一电池单体11的结构强度较高，长度较小的第二电池单体12的结构强度较低，通过第一电池单体11和第二电池单体12相连，使第一电池单体11可以增强第二电池单体12的结构强度，从而提高电池1000的整体结构强度，防止电池单体10尤其是第二电池单体12易因撞击而损坏。并且，利用电池单体10的自身特性，无需另外设置加强结构，也能提高电池1000的整体结构强 度，有利于简化电池1000结构。
本申请实施例公开的电池1000可以用于、但不限用于车辆、船舶或飞行器等用电装置2000中，可以使具备本申请公开的电池1000等组成该用电装置2000的电源系统，以保证用电装置2000的使用安全性和可靠性。
例如，本申请实施例公开的用电装置2000可以是、但不限于是车辆、手机、平板、笔记本电脑、轮船、航天器、电动玩具和电动工具等等。车辆可以是燃油车辆、或燃气车辆、或新能源车辆、或轨道车辆，新能源车辆可以是纯电动车辆、混合动力车辆或增程式车辆等；航天器包括飞机、火箭、航天飞机和宇宙飞船等等；电动玩具包括固定式或移动式的电动玩具，例如，游戏机、电动车辆玩具、电动轮船玩具和电动飞机玩具等等；电动工具包括金属切削电动工具、研磨电动工具、装配电动工具和铁道用电动工具，例如，电钻、电动砂轮机、电动扳手、电动螺丝刀、电锤、冲击电钻、混凝土振动器和电刨等等。
下面，参考附图，描述根据本申请实施例的电池1000。
如图1-图11所示，电池1000包括多个电池单体10。多个电池单体10包括至少一个第一电池单体11和至少一个第二电池单体12，第一电池单体11的长度大于第二电池单体12的长度。并且第一电池单体11与第二电池单体12相邻且相连。
多个电池单体10包括至少一个第一电池单体11和至少一个第二电池单体12。即，电池单体10的数量为两个或者两个以上。电池单体10为两个时，两个电池单体10分别为第一电池单体11和第二电池单体12。电池单体10为两个以上时，第一电池单体11的数量为一个或一个以上，第二电池单体12的数量为一个或者一个以上。
第一电池单体11的长度大于第二电池单体12的长度。电池单体10具有长度、宽度和厚度，电池单体10的长度大于宽度，宽度大于厚度。第一电池单体11比第二电池单体12长度更长，例如，第一电池单体11的长度大于或等于140mm，第二电池单体12的长度小于140mm。需要说明的是，这里所说的电池单体10的长度、宽度和厚度，是指电池单体10的壳体的尺寸，而不包括壳体上电连接部13等凸出结构的尺寸。
电池单体10的长度越长，结构强度越高；长度越短，结构强度越差，但能够满足较小安装空间、小容量、电池单体10加工工艺难度低、避免极片过长极化大功率性能低等需求。
第一电池单体11和第二电池单体12相邻且相连。即第一电池单体11和第二电池单体12之间未设置其他电池单体10，以使二者相邻。第一电池单体11和相邻的第二电池单体12之间可以相互接触，也可以间隔开较小间隙。并且第一电池单体11和相邻的第二电池单体12连接在一起，使第一电池单体11与第二电池单体12构成一个整体，从而通过第一电池单体11提高第二电池单体12的结构强度。因此，第二电池单体12的长度设置更灵活，通过与第一电池单体11配合不易出现结构强度差、易损坏的情况，且更易于加工，极片极化小，第二电池单体12功率性能高。
此外，第一电池单体11与第二电池单体12相连能够提高整体结构强度，因此可以省去额外的加强结构，减少加强结构占用空间，从而可以提高电池1000内部的空间利用率，使结构更紧凑。当然，根据实际情况需要，电池1000也可以另外设置加强结构，通过加强结构与本申请实施例的长短电池单体10相连的方案相结合，能够进一步提高电池1000的整体结构强度。
需要说明的是，在第一电池单体11为多个的实施例中，至少一个第一电池单体11与第二电池单体12相连；在第二电池单体12为多个的实施例中，至少一个第二电池单体12与第一电池单体11相连，这都在本申请的保护范围之内。
本申请对第一电池单体11和第二电池单体12的连接方式不做特殊限制，二者可以直接连接，或者通过其他部件连接。例如通过粘胶层、焊接、紧固件、口字框等方式连接在一起。其中，粘胶层可以将第一电池单体11与第二电池单体12的彼此相对的表面 粘接，以实现连接固定。紧固件可以将第一电池单体11的壳体与第二电池单体12的壳体紧固连接，或者将第一电池单体11的壳体上的凸耳与第二电池单体12的壳体上的凸耳紧固连接等。口字框为环形，可以将第一电池单体11和第二电池单体12包围、裹紧，以实现二者的连接。
根据本申请实施例的电池1000，通过第一电池单体11的长度大于第二电池单体12的长度，且第一电池单体11与相邻的第二电池单体12相连，可以提高第二电池单体12的强度，以及电池1000的整体结构强度，提高了电池单体10的稳定性和使用寿命，保证了电池1000的使用安全性和可靠性，同时有利于提高电池1000内部的空间利用率。并且，第二电池单体12沿第二方向F2的尺寸设计更灵活，以满足不同电池1000的使用需求。当本申请实施例公开的电池1000用于用电装置2000中时，用电装置2000的电源系统可以采用本申请公开的电池1000，从而可以提升用电装置2000的使用安全性和可靠性。
在一些实施例中，如图1-图3和图5-图6所示，第一电池单体11为一个。
在另一些实施例中，如图4和图7-图8所示，第一电池单体11为多个且构成至少一个第一电池排21，第一电池排21包括一个第一电池单体11或沿厚度方向层叠布置的多个第一电池单体11。
第一电池排21包括一个第一电池单体11或沿厚度方向层叠布置的多个第一电池单体11。换言之，多个第一电池单体11相邻设置时，沿第一电池单体11的厚度方向层叠布置，使第一电池排21结构更紧凑，也使多个第一电池单体11之间连接更可靠，进一步提高结构强度。
例如图4所示，电池1000包括三个第一电池单体11，构成两个第一电池排21，每个第一电池排21的两侧分别设有第二电池单体12，其中一个第一电池排21包括一个第一电池单体11，另一个第一电池排21包括两个第一电池单体11。
再例如图7和图8所示，电池1000包括四个第一电池单体11，四个第一电池单体11沿自身厚度方向层叠布置，构成一个第一电池排21。
在本申请的一些实施例中，如图1-图8所示，第二电池单体12为多个，第一电池单体11与至少两个第二电池单体12相连。使第一电池单体11能够将多个第二电池单体12连接成一体，以进一步提高电池1000的结构强度，提高抗撞击能力。
需要说明的是，这里并非对所有第一电池单体11的限制，即一部分第一电池单体11可以与至少两个第二电池单体12相连，另一部分第一电池单体11可以仅与一个第二电池单体12相连或者不与第二电池单体12相连。例如图7和图8所示，四个第一电池单体11中，其中一个第一电池单体11与相邻的四个第二电池单体12相连，另外三个第一电池单体11不直接与第二电池单体12连接，而是通过四个第一电池单体11连接为整体，以提高与第二电池单体12相连的一个第一电池单体11的结构强度的方式，提高电池1000的整体结构强度。
根据本申请的一些实施例，如图1-图8所示，多个第二电池单体12构成多个第二电池排22，每个第二电池排22包括沿第二电池单体12的长度方向排布的多个第二电池单体12。
由此，电池1000可以包括一个第二电池排22或者包括多个第二电池排22，通过调节第二电池排22的数量以及每个第二电池排22所包括第二电池单体12的数量，以便于满足不同电池1000对电压、电容和尺寸等需求。在包括多个第二电池排22的一些实施例中，多个第二电池排22可以沿第二电池单体12的宽度方向或厚度方向排布，以满足空间排布需求。
此外，在一些实施例中，如图2-图8所示，第一电池单体11可以连接同一第二电池排22的多个第二电池单体12。即，第一电池单体11将沿长度方向排布的多个第二电池单体12连接在一起，以使第二电池排22形成一个整体，进一步提高了结构强度。
在一些实施例中，如图1所示，第一电池单体11连接至少两个第二电池排22。即第一电池单体11将至少两个第二电池排22连接成一个整体，同样能够进一步提高结构强度。
在一些实施例中，第一电池单体11可以连接同一第二电池排22的多个第二电池单体12，并且第一电池单体11连接至少两个第二电池排22，以进一步提高电池1000的整体强度。
在一些具体实施例中，多个第二电池排22之间还可以直接相连，多个第一电池单体11之间可以连接成一体，如通过粘胶层连接，以进一步提高电池1000的整体结构强度。
在一些实施例中，如图1所示，至少两个第二电池排22沿第一方向F1排布，第二电池单体12的长度方向为第二方向F2，第一方向F1与第二方向F2垂直。也就是说，第一方向F1可以平行于第二电池单体12的宽度方向或者厚度方向，至少两个第二电池排22沿第二电池单体12的宽度方向或者厚度方向层叠布置，以使电池1000整体在三维方向上的尺寸更合理，有利于提高电池1000内部的空间利用率。
继续参照图1所示，至少一个第一电池单体11的长度方向平行于第一方向F1，且位于第二电池排22中相邻两个第二电池单体12之间。
即至少一个第一电池单体11可以沿多个第二电池排22的排布方向延伸，并且该第一电池单体11能够将第二电池排22的两个第二电池单体12分隔开，且该第一电池单体11的两侧能够分别与两个第二电池单体12相连。
由此，第一电池单体11能够在第二方向F2上将同一第二电池排22的两个第二电池单体12连接在一起，形成第二电池单体12-第一电池单体11-第二电池单体12的三层结构，并且在第一方向F1上能够将多个第二电池排22连接在一起，进而使整个电池单体10在第一方向F1和第二方向F2上的整体结构更稳定。并且第一电池单体11和第二电池单体12的长度方向相互垂直，即采用不同的排布方式，可以增加电池1000的整体刚度。
在一些实施例中，如图1所示，沿第一方向F1排布的第二电池排22的数量为M，第一电池单体11的长度大于M-1个第二电池排22沿第一方向F1的尺寸之和。
换言之，M个第二电池排22中，每个第二电池排22的相邻两个第二电池单体12均被第一电池单体11分隔开并通过该第一电池单体11相连，保证第一电池单体11能够实现M个第二电池排22的连接，还保证能够实现M个第二电池排22内部的第二电池单体12的连接，电池1000的整体性更高。
在本申请的一些实施例中，如图1所示，第一电池单体11的厚度方向平行于第二方向F2，以使第一电池单体11在分隔相邻两个第二电池单体12时，第一电池单体11厚度方向一侧的面积较大的表面与第二电池单体12相配合，对第二电池单体12的支撑限位更可靠，且第一电池单体11在第二方向F2上占用空间较小。
其中，如图1所示，第二电池单体12的厚度方向可以平行于第一方向F1。即多个第二电池排22沿第二电池单体12的厚度方向层叠布置，以使多个第二电池排22的排布紧凑，减小第一方向F1的占用空间。并且第二电池单体12的宽度方向沿第三方向F3，可以减小电池1000整体沿第三方向F3的厚度。第一方向F1和第二方向F2均与第三方向F3垂直。另外，第一电池单体11和第二电池单体12的厚度方向也相互垂直，可以进一步提高整体刚度。
或者，第二电池单体12的厚度方向平行于第三方向F3，第一方向F1和第二方向F2均与第三方向F3垂直。至少两个第二电池排22沿第三方向F3层叠布置且均与相邻第一电池单体11相连。即在第三方向F3上第二电池排22可以形成多层结构，以便于通过调节第二电池排22的层数调节电池1000整体的厚度。并且，通过第一电池单体11可以连接两层第二电池排22，构成一体，以利于提高整体刚度。另外，第一电池单体11和第二电池单体12的宽度方向也相互垂直，可以进一步提高整体刚度。
在本申请的一些实施例中，如图2-图8所示，第二电池单体12的长度方向为第二方向F2。至少一个第一电池单体11的长度方向平行于第二方向F2，即第一电池单体11与第二电池单体12彼此平行设置。
并且，第一电池单体11与第二电池排22沿第一方向F1或第三方向F3层叠布置且相连，第一方向F1、第二方向F2和第三方向F3两两垂直。以使第一电池单体11与第二电池排22构成多层结构，以提高整体刚度。并且，第一电池单体11可以将第二电池排22所包括的多个第二电池单体12连接在一起，以提高第二电池排22内部的结构强度。
在一些实施例中，第二电池排22包括N个第二电池单体12，即N个第二电池单体12沿第二方向F2排成一排。第一电池单体11的长度大于N-1个第二电池单体12的长度之和。
由此，第二电池排22中，每个第二电池单体12均能够与同一第一电池单体11相连，以保证第一电池单体11能够将第二电池排22连接成一体。其中第一电池单体11的长度大于或等于N个第二电池单体12的长度之和时，N个第二电池单体12分别与第一电池单体11的连接长度相等，且均等于第二电池单体12的长度，从而保证N个第二电池单体12的连接均匀性。
在一些实施例中，如图7和图8所示，第一电池单体11沿第一方向F1的同一侧设有至少两个第二电池排22，且至少两个第二电池排22沿第三方向F3层叠布置。也就是说，第一电池单体11的同一侧与至少两个第二电池排22相邻，并且第一电池单体11能够与相邻的全部第二电池排22均相连，以将位于同一侧的多个第二电池排22连接成一体，提高整体刚度。
在一些实施例中，如图5和图6所示，第一电池单体11沿第一方向F1的至少一侧和沿第三方向F3的至少一侧分别设有第二电池排22。也就是说，第一电池单体11的两侧分别与第二电池排22相邻，并且第一电池单体11能够与相邻的全部第二电池排22均相连，以将位于两侧的多个第二电池排22连接成一起，提高整体刚度。
当然，第一电池单体11的第一方向F1的同一侧可以设有一个或者多个层叠布置的第二电池排22，并且第一电池单体11的第三方向F3的同一侧可以设有一个或者多个层叠布置的第二电池排22，由此，第一电池单体11可以从两侧分别连接多个第二电池排22，进而将更多第二电池排22连接在一起，以进一步提高整体刚度。
例如，在如图5和图6所示的具体示例中，第一电池单体11沿第一方向F1的一侧连接有一个第二电池排22，且第一电池单体11沿第三方向F3的一侧连接有一个第二电池排22。再例如，在如图7和图8所示的示例中，第一电池单体11沿第一方向F1的一侧连接有两个第二电池排22，上述两个第二电池排22沿第三方向F3层叠布置。
在第一电池单体11与第二电池单体12的长度方向平行的一些实施例中，如图2-图8所示，第二电池单体12的厚度方向与第一电池单体11的厚度方向可以相互平行或相互垂直。
其中，如图2-图6所示，第二电池单体12的厚度方向与第一电池单体11的厚度方向相互平行，以使第一电池单体11与第二电池单体12层叠设置后结构紧凑，占用空间小。并且，在包括泄压部14的实施例中，便于将泄压部14设于不易变形的窄面(如沿宽度方向一侧的表面)上，使泄压部14安装可靠，不易变形，还可以避免朝向相邻电池单体10泄压导致连锁热失控。
如图7-图8所示，第二电池单体12的厚度方向与第一电池单体11的厚度方向相互垂直。以使第一电池单体11和第二电池单体12的排布方向不同，从而增加电池1000的整体刚度。
根据本申请的一些实施例，如图1-图8所示，第一电池单体11长度方向的两侧分别设有电连接部13，如两侧分别设有正极电极端子和负极电极端子。第二电池排22长 度方向的两侧分别设有电连接部13，位于第二电池排22同一侧的电连接部13可以为一个也可以为两个。
此外，第二电池排22一侧的电连接部13和第一电池单体11的其中一个电连接部13通过电连接件相连。第二电池排22另一侧的电连接部13和第一电池单体11的另一个电连接部13通过电连接件相连。电连接件用于实现两个电连接部13的电连接，例如电连接件可以为汇流片。
通过第二电池排22一侧的电连接部13和第一电池单体11的其中一个电连接部13通过电连接件相连。第二电池排22另一侧的电连接部13和第一电池单体11的另一个电连接部13通过电连接件相连。使第一电池单体11自身起到电连接转接作用，无需另外设置汇流片等部件即可实现第二电池排22两侧的电连接部13的电连接。
例如，若通过汇流片连接第二电池排22两侧的电连接部13，汇流片需要沿第二方向F2由一侧延伸至另一侧，并在第一方向F1或者第三方向F3上与第二电池排22层叠布置，以占用额外空间。因此，利用长度较长的第一电池单体11转接，省去了另外设置汇流片的空间，提高了电池1000内部的空间利用率，且有利于减小电池1000尺寸。并且，减少了零部件数量，降低了成本。
在第二电池排22为多个的一些实施例中，多个第二电池排22的位于同一侧的电连接部13可以通过电连接件进行电连接，以实现多个第二电池排22的串联或者并联。并且，电连接件无需沿第二方向F2横跨第二电池排22，可以减少占用第一方向F1和第三方向F3的空间，且电连接件的尺寸较小，使结构紧凑，提高空间利用率。
在本申请的实施例中，第二电池排22的电连接部13也灵活设置。
例如图1-图3和图5—图8所示，第二电池排22包括两个第二电池单体12，两个第二电池单体12的彼此远离侧设有电连接部13。即，每个第二电池单体12的正极电极端子和负极电极端子设于同一侧，且设于两个第二电池单体12的彼此远离侧。以使正极电极端子和负极电极端子可以由同一侧进行电连接和散热，共用安装空间和散热空间，使结构更紧凑。
再例如图4所示，第二电池排22包括至少两个第二电池单体12，每个第二电池单体12长度方向的两侧分别设有电连接部13，例如两侧分别设有正极电极端子和负极电极端子。相邻两个第二电池单体12彼此相对的电连接部13相连，例如直接焊接相连，或者通过转接件电连接等。
以使同一第二电池排22中，两个第二电池单体12的电连接部13能够直接相连。一方面可以在第二方向F2上对两个第二电池单体12起到支撑作用，有利于提高第二电池排22的整体结构强度，也可以省去汇流片、转接片等结构，有利于节省空间；另一方面，可以实现两个第二电池单体12的电连接，从而实现同一第二电池排22中电池单体10的串联或者并联，并且电连接结构位于电池1000的中部，可以防止侧撞时直接撞到电连接结构。
需要说明的是，在本申请的实施例中，电池单体10可以为硬壳电池单体或者软包电池单体。硬壳电池单体的电极端子为柱状结构，强度较高，可以直接相抵，兼顾支撑、限位作用。软包电池单体的电极端子可以为片状结构，相对电极端子可以层叠以直接连接，占用空间更小。
在第二电池排22包括多个第二电池单体12的实施例中，第二电池单体12的数量可以为2～5个，避免第二电池单体12过多导致电池1000的整体尺寸过大。
根据本申请的一些实施例，至少一个电池单体10为无放电平台的电池单体，无放电平台的电池单体的放电曲线中，在5％～95％放电容量区间内，每个5％放电容量为取值点，相邻两个取值点的连线斜率大于或等于1。
放电曲线为电池单体10放电过程中，电压(OCV)与放电容量(SOC)的测试曲线。
在5％～95％放电容量区间内，每个5％放电容量为取值点，放电曲线中相邻两个取值 点的连线斜率大于或等于1。每个5％放电容量为取值点，即，在5％、10％、15％、20％……85％、90％和95％放电容量处均作为取值点。相邻两个取值点的连线，例如在放电曲线上，将5％放电容量对应的取值点和10％放电容量对应的取值点连接得到的线段。
连线的斜率越大，放电时电压变化越快，越易于识别SOC和OCV的关系，从而易于根据检测到的OCV判断电池单体10当前的SOC。而连线的斜率较小时，会导致放电曲线形成放电平台，即在一定SOC范围内，对应的OCV接近，导致根据检测到的OCV难以判断电池单体10实际SOC。
因此，在相邻两个取值点的连线斜率大于或等于1时，放电曲线具有明显的SOC曲线弧度，认为电池单体10的放电曲线不存在放电平台，对应的电池单体10为无放电平台的电池单体；在相邻两个取值点的连线斜率小于1时，放电曲线具有明显的平台曲线，认为电池单体10的放电曲线存在放电平台，对应的电池单体10为有放电平台的电池单体。
至少一个电池单体10为无放电平台的电池单体，使电池1000的整体放电曲线不存在放电平台。由此在电池1000使用过程中，可以根据检测电压准确判断电池1000的放电容量，即准确判断剩余电量，避免出现电量骤降的情况。
在一些实施例中，至少一个电池单体10为有放电平台的电池单体，有放电平台的电池单体的放电曲线中相邻两个取值点放电连线斜率小于1。
也就是说，电池1000通过有放电平台的电池单体和无放电平台的电池单体配合，通过无放电平台的电池单体来提高放电容量的检测准确性，通过有放电平台的电池单体可以提高电容量，进而提高电池1000的续航能力。
在一些具体实施例中，第一电池单体11为有放电平台的电池单体，第二电池单体12为无放电平台的电池单体。与无放电平台的电池单体相比，有放电平台的电池单体的安全性更好，长度较大的第一电池单体11采用更加安全的有放电平台的电池单体，更利于保证第一电池单体11的安全稳定性，保证使第一电池单体11能够为第二电池单体12以及整个电池1000提供更可靠的结构稳定性。
在本申请的一些实施例中，至少两个电池单体10的热失控温度阈值不相等。热失控温度阈值，即温度低于该阈值时，电池单体10不会发生热失控，而高于该值时发生热失控的风险极高。热失控温度阈值不相等的两个电池单体10中，热失控温度阈值较低的电池单体10发生热失控时，温度低于热失控温度阈值较高的电池单体10的热失控温度阈值，即热失控温度阈值较高的电池单体10在该温度下不会热失控，以形成隔热屏障，避免热失控时的热量急速扩散。
在一些实施例中，热失控温度较低的电池单体10可以位于热失控温度较高的电池单体10的两侧，从而将热失控温度较低的电池单体10分隔开来，以避免热失控连锁反应。
在一些实施例中，第一电池单体11的热失控温度阈值高于第二电池单体12的热失控温度阈值。即，长度较大的第一电池单体11比长度较小的第二电池单体12更不易发生热失控，第一电池单体11的稳定性和安全性更高，能够保证更可靠的结构增强效果，也满足较大尺寸的加工需求，降低加工难度。并且，长度较长对热量的阻隔效果更好，防止热失控扩散的效果更好。
在一些实施例中，热失控温度阈值较高的电池单体10和热失控温度阈值较低的电池单体10的热失控温度阈值差值大于或等于20℃，以避免因热量积累导致温度达到热失控温度阈值较高的电池单体10的热失控温度阈值，避免热失控进一步扩散。
在一些具体实施例中，第一电池单体11为磷酸铁锂电池单体(LFP电池单体)，第二电池单体12为三元电池单体(如镍锰钴NCM电池单体等)。磷酸铁锂电池单体的放电曲线具有明显的放电平台，三元体系的放电曲线具备明显的曲线弧度。并且磷酸铁锂电池单体比三元电池单体的热失控温度阈值更高，安全性更高。三元电池单体的容量更好，续航能力更强。
二者相结合，既能提高放电容量的检测准确性，又能提高电池1000的续航能力，还能提高电池1000的整体安全可靠性。并且，第一电池单体11仅需一种规格，第二电池单体12仅需一种规格，避免相同外观的电池单体10采用不同化学体系导致组装容易出错。
根据本申请的一些实施例，如图9-图11所示，电池单体10设有泄压部14和电连接部13。在电池单体10内压过大(例如热失控)时，泄压部14用于释放电池单体10内部物质(例如气体、液体、颗粒物等)，以降低电池单体10的内部压力，避免电池单体10内部过快加压，而导致电池单体10爆燃等危险事故。例如，泄压部14可以为防爆阀、防爆片等等。
此外，泄压部14与电连接部13设于电池单体10的不同侧。有利于保证电池单体10的电连接部13和泄压部14之间具有较大的间距，以有效避免在热失控等情况下，电池单体10通过自身泄压部14排放的排放物中的导电颗粒等流至自身电连接部13造成绝缘失效、高压打火、引发起火爆炸等问题。
在一些实施例中，如图9-图11所示，电池单体10具有沿长度方向彼此相对的两个第一表面，沿宽度方向彼此相对的两个第二表面，以及沿厚度方向彼此相对的两个第三表面。
如图9所示，第一电池单体11的两个电连接部13分别设于两个第一表面，泄压部14设于其中一个第二表面。如图10所示，第二电池单体12的两个电连接部13设于同一个第一表面，泄压部14设于其中一个第二表面。换言之，电连接部13与泄压部14分别位于电池单体10的相邻侧，可以使得电连接部13与泄压部14之间具有一定的安全距离，降低泄压部14排出的排放物对电连接部13的影响，提高电池1000的使用安全性和可靠性。并且，泄压部14设于电池单体10的窄面，窄面不易变形，可以保证泄压部14的安装稳定性。
如图11所示，第二电池单体12的两个电连接部13设于其中一个第一表面，泄压部14设于另一个第一表面。换言之，泄压部14与电连接部13分别的设于电池单体10彼此相对的两侧表面。由此，可以进一步拉远电连接部13与泄压部14之间的距离，可以更好地保证电连接部13免受泄压部14排出的排放物的影响，即受影响概率更小，电池1000的使用安全性和可靠性更好。
在一些具体实施例中，如图1-图8所示，第一电池单体11的泄压部14设于第二表面。第一电池单体11的宽度方向平行于第三方向F3，且在第三方向F3上第一电池单体11为单层；或者，第一电池单体11在第一方向F1上位于全部第二电池单体12的同一侧，第一电池单体11的宽度方向平行于第一方向F1且泄压部14设于第一电池单体11背向第二电池单体12的第二表面。
第二电池单体12的泄压部14设于第二表面，第二电池单体12的宽度方向平行于第三方向F3，且在第三方向F3上第二电池单体12为单层；或者，第二电池单体12的泄压部14设于第一表面，同一第二电池排22的相邻两个第二电池单体12设有泄压部14的第一表面相对，且两个第二电池单体12之间设有梁体，梁体具有散热通道，泄压部14朝向散热通道喷发，以通过散热通道将高温气体排出。
由此，第一电池单体11设有泄压部14的第二表面与其他电池单体10均不相对，第二电池单体12设有泄压部14的表面与其他电池单体10也不直接相对，泄压部14不朝向任一电连接部13喷发，也不朝向其他电池单体10的壳体喷发，从而可以有效保证各电池单体10的电连接部13免受其他电池单体10排出的排放物的影响，保证了电池1000的使用安全性和可靠性。
根据本申请第二方面实施例的用电装置2000，包括根据本申请上述第一方面实施例的电池1000，电池1000用于为用电装置2000提供电能。由此，通过采用上述的电池1000，有利于提升用电装置2000的使用安全性和可靠性。
可选地，如图12所示，当电池1000用于车辆时，电池1000可以设置在车辆的底部、或头部、或尾部。电池1000可以用于车辆的供电，例如，电池1000可以作为车辆的操作电源。车辆还可以包括控制器和马达，控制器用来控制电池1000为马达供电，例如，用于车辆的启动、导航和行驶时的工作用电需求。
下面结合附图描述根据本申请一些具体实施例的电池1000和具有其的车辆。
如图12所示，电池1000设于车辆的车底架。如图1-图11所示，电池1000包括箱体40和设于箱体40内的多个电池单体10，多个电池单体10包括第一电池单体11和第二电池单体12。第一电池单体11的长度大于第二电池单体12的长度，第一电池单体11和第二电池单体12的宽度相等，且厚度相等。第一电池单体11为LFP电池单体，其放电曲线具有明显的放电平台，且热失控温度阈值相对较高。第二电池单体12为NCM电池单体，其放电曲线具有明显的曲线弧度，且热失控温度阈值相对较低。第一电池单体11长度方向的两侧分别设有正极电极端子和负极电极端子。
第三方向F3为竖直方向，第一方向F1为左右水平方向，第二方向F2为前后水平方向。电池单体10的厚度方向平行于第三方向F3时，表示电池单体10采用平躺设计；电池单体10的宽度方向平行于第三方向F3时，表示电池单体10采用直立设计。
在如图1所示的第一实施例中，64个第二电池单体12构成沿第一方向F1排布的32个第二电池排22，每个第二电池排22包括沿第二方向F2排布的两个第二电池单体12，以使64个第二电池单体12形成前后分布的两排。每个第二电池单体12均直立设计且厚度方向平行于第一方向F1。一个第一电池单体11采用直立设计，长度方向平行于第一方向F1且厚度方向平行于第二方向F2。该第一电池单体11位于前后两排第二电池单体12之间，起到热失控时的屏障作用，将热失控温度较低的第二电池单体12分隔开来，避免热失控时热量急速扩散；也起到加强梁的作用，使整个电池1000的刚度大大提高。
在如图2-图3所示的第二实施例中，与第一实施例的不同之处在于，第一电池单体11的长度方向平行于第二方向F2且厚度方向平行于第一方向F1。该第一电池单体11沿第一方向F1与32个第二电池排22层叠布置，以使第一电池单体11能够将相邻的第二电池排22的两个第二电池单体12连接在一起，起到结构增强效果。此外，第一电池单体11的两侧出电极端子，第二电池单体12均为一侧出双电极端子，使第一电池单体11起到引流转接的作用。
在如图4所示的第三实施例中，与第二实施例的不同之处在于，第一电池单体11为三个，构成两个第一电池排21，其中一个第一电池排21包括一个第一电池单体11，另一个第一电池排21包括两个第一电池单体11。每个第一电池排21位于相邻两个第二电池排22之间，通过将第一电池排21设于两个第二电池排22之间，起到加强梁的作用，提高结构强度的效果更好，还可以起到热缓冲作用，避免热量急速扩散。每个第二电池排22包括沿第二方向F2排布的三个第二电池单体12，每个第二电池单体12为两侧出电极端子，任意相邻两个第二电池单体12通过电极端子对电极端子连接。
在如图5和图6所示的第四实施例中，第一电池单体11和第二电池单体12均为平躺设计且长度方向平行于第二方向F2。34个第二电池单体12构成17个第二电池排22，其中16个第二电池排22沿第三方向F3排布成两层，每层包括沿第一方向F1排布的8个第二电池排22，第17个第二电池排22与第一电池单体11沿第三方向F3层叠布置且位于上述16个第二电池排22沿第一方向F1的一侧。
在如图7和图8所示的第五实施例中，第一电池单体11为直立设计且长度方向平行于第二方向F2，第二电池单体12为平躺设计且长度方向平行于第二方向F2。32个第二电池单体12构成16个第二电池排22，16个第二电池排22沿第三方向F3排布成两层，每层包括沿第一方向F1排布的8个第二电池排22。四个第一电池单体11沿第一方向F1层叠布置，且均位于上述16个第二电池排22沿第一方向F1的同一侧。
在本申请的第六实施例中，与第四实施例的相同之处在于，第一电池单体11与一个第二电池排22沿第三方向F3层叠布置，不同之处在于，其余第二电池排22均为直立设计且沿第一方向F1层叠布置。
通过第一电池单体11与第二电池单体12连接在一起，在多个电池单体10组装成电池1000后，可以增加电池1000整体的强度和稳定性，防止电池单体10损坏，避免造成安全风险。
需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互结合。
以上仅为本申请的优选实施例而已，并不用于限制本申请，对于本领域的技术人员来说，本申请可以有各种更改和变化。凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。

Claims (21)

  1. 一种电池(1000)，其中，包括多个电池单体(10)，所述多个电池单体(10)包括：
    至少一个第一电池单体(11)和至少一个第二电池单体(12)，所述第一电池单体(11)的长度大于所述第二电池单体(12)的长度，且所述第一电池单体(11)与所述第二电池单体(12)相邻且相连。
  2. 如权利要求1所述的电池(1000)，其中，所述第一电池单体(11)为多个且构成至少一个第一电池排(21)，所述第一电池排(21)包括一个所述第一电池单体(11)或沿厚度方向层叠布置的多个所述第一电池单体(11)。
  3. 如权利要求1或2所述的电池(1000)，其中，所述第二电池单体(12)为多个，所述第一电池单体(11)与至少两个所述第二电池单体(12)相连。
  4. 如权利要求3所述的电池(1000)，其中，多个所述第二电池单体(12)构成多个第二电池排(22)，每个所述第二电池排(22)包括沿所述第二电池单体(12)的长度方向排布的多个所述第二电池单体(12)；
    所述第一电池单体(11)连接同一所述第二电池排(22)的多个所述第二电池单体(12)；和/或，所述第一电池单体(11)连接至少两个所述第二电池排(22)。
  5. 如权利要求4所述的电池(1000)，其中，至少两个所述第二电池排(22)沿第一方向(F1)排布，所述第二电池单体(12)的长度方向为第二方向(F2)，所述第一方向(F1)与所述第二方向(F2)垂直，至少一个所述第一电池单体(11)的长度方向平行于所述第一方向(F1)，且位于所述第二电池排(22)中相邻两个所述第二电池单体(12)之间。
  6. 如权利要求5所述的电池(1000)，其中，沿所述第一方向(F1)排布的所述第二电池排(22)的数量为M，所述第一电池单体(11)的长度大于M-1个所述第二电池排(22)沿所述第一方向(F1)的尺寸之和。
  7. 如权利要求5或6所述的电池(1000)，其中，所述第一电池单体(11)的厚度方向平行于所述第二方向(F2)，其中，
    所述第二电池单体(12)的厚度方向平行于所述第一方向(F1)；或者，
    所述第二电池单体(12)的厚度方向平行于第三方向(F3)，所述第一方向(F1)和所述第二方向(F2)均与所述第三方向(F3)垂直，至少两个所述第二电池排(22)沿所述第三方向(F3)层叠布置且均与相邻所述第一电池单体(11)相连。
  8. 如权利要求4所述的电池(1000)，其中，所述第二电池单体(12)的长度方向为第二方向(F2)，至少一个所述第一电池单体(11)的长度方向平行于所述第二方向(F2)，且所述第一电池单体(11)与所述第二电池排(22)沿第一方向(F1)或第三方向(F3)层叠布置且相连，所述第一方向(F1)、所述第二方向(F2)和所述第三方向(F3)两两垂直。
  9. 如权利要求8所述的电池(1000)，其中，所述第二电池排(22)包括N个所述第二电池单体(12)，所述第一电池单体(11)的长度大于N-1个所述第二电池单体(12)的长度之和。
  10. 如权利要求8或9所述的电池(1000)，其中，
    所述第一电池单体(11)沿所述第一方向(F1)的同一侧设有至少两个所述第二电池排(22)，且所述至少两个第二电池排(22)沿所述第三方向(F3)层叠布置；和/或，
    所述第一电池单体(11)沿所述第一方向(F1)的至少一侧和沿所述第三方向(F3)的至少一侧分别设有所述第二电池排(22)。
  11. 如权利要求8-10中任一项所述的电池(1000)，其中，所述第二电池单体(12)的厚度方向与所述第一电池单体(11)的厚度方向相互平行或相互垂直。
  12. 如权利要求4-11中任一项所述的电池(1000)，其中，所述第一电池单体(11)长度方向的两侧分别设有电连接部(13)，所述第二电池排(22)长度方向的两侧分别设有电连接部(13)，
    所述第二电池排(22)一侧的所述电连接部(13)和所述第一电池单体(11)的其中一个所述电连接部(13)通过电连接件相连；所述第二电池排(22)另一侧的所述电连接部(13)和所述第一电池单体(11)的另一个所述电连接部(13)通过电连接件相连。
  13. 如权利要求12所述的电池(1000)，其中，
    所述第二电池排(22)包括两个所述第二电池单体(12)，两个所述第二电池单体(12)的彼此远离侧设有所述电连接部(13)；或者，
    所述第二电池排(22)包括至少两个所述第二电池单体(12)，每个所述第二电池单体(12)长度方向的两侧分别设有所述电连接部(13)，相邻两个所述第二电池单体(12)彼此相对的所述电连接部(13)相连。
  14. 如权利要求1-13中任一项所述的电池(1000)，其中，至少一个所述电池单体(10)为无放电平台的电池单体，所述无放电平台的电池单体的放电曲线中，在5％～95％放电容量区间内，每个5％放电容量为取值点，相邻两个所述取值点的连线斜率大于或等于1。
  15. 如权利要求14所述的电池(1000)，其中，至少一个所述电池单体(10)为有放电平台的电池单体，所述有放电平台的电池单体的放电曲线中相邻两个所述取值点的连线斜率小于1。
  16. 如权利要求15所述的电池(1000)，其中，所述第一电池单体(11)为有放电平台的电池单体，所述第二电池单体(12)为无放电平台的电池单体。
  17. 如权利要求1-16中任一项所述的电池(1000)，其中，至少两个所述电池单体(10)的热失控温度阈值不相等。
  18. 如权利要求17所述的电池(1000)，其中，所述第一电池单体(11)的热失控温度阈值高于所述第二电池单体(12)的热失控温度阈值。
  19. 如权利要求1-18中任一项所述的电池(1000)，其中，所述第一电池单体(11)为磷酸铁锂电池单体，所述第二电池单体(12)为三元电池单体。
  20. 如权利要求1-19中任一项所述的电池(1000)，其中，所述电池单体(10)设有泄压部(14)和电连接部(13)，所述泄压部(14)与所述电连接部(13)设于所述电池单体(10)的不同侧。
  21. 一种用电装置(2000)，其中，包括如权利要求1-20中任一项所述的电池(1000)，所述电池(1000)用于为所述用电装置(2000)提供电能。
PCT/CN2022/127963 2022-10-27 2022-10-27 电池及用电装置 WO2024087099A1 (zh)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04313881A (ja) * 1991-04-12 1992-11-05 Sony Corp バッテリー収納用ケース
CN213150897U (zh) * 2020-09-27 2021-05-07 江苏塔菲尔新能源科技股份有限公司 一种动力电池包结构
CN213601929U (zh) * 2020-11-05 2021-07-02 江苏塔菲尔新能源科技股份有限公司 一种异形电池包结构
WO2022104548A1 (zh) * 2020-11-17 2022-05-27 宁德时代新能源科技股份有限公司 电池、使用电池的装置、电池的制备方法和制备设备
WO2023060656A1 (zh) * 2021-10-12 2023-04-20 宁德时代新能源科技股份有限公司 电池、用电装置、制备电池的方法和装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04313881A (ja) * 1991-04-12 1992-11-05 Sony Corp バッテリー収納用ケース
CN213150897U (zh) * 2020-09-27 2021-05-07 江苏塔菲尔新能源科技股份有限公司 一种动力电池包结构
CN213601929U (zh) * 2020-11-05 2021-07-02 江苏塔菲尔新能源科技股份有限公司 一种异形电池包结构
WO2022104548A1 (zh) * 2020-11-17 2022-05-27 宁德时代新能源科技股份有限公司 电池、使用电池的装置、电池的制备方法和制备设备
WO2023060656A1 (zh) * 2021-10-12 2023-04-20 宁德时代新能源科技股份有限公司 电池、用电装置、制备电池的方法和装置

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