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公开(公告)号：US20240145715A1
公开(公告)日：2024-05-02
申请号：US18404671
申请日：2024-01-04
Applicant: BYD COMPANY LIMITED
Inventor： Bin CHENG , Yi PAN , Minghao ZHUANG , Ruoyi DENG , Pengyu WU
CPC classification number: H01M4/62 , H01M4/131 , H01M4/364 , H01M4/505 , H01M4/525 , H01M10/4235 , H01M2004/028
Abstract: A battery positive electrode material including lithium ferromanganese phosphate particles and active particles dispersed in voids between the lithium ferromanganese phosphate particles. The active particles include one or more of lithium nickel cobalt manganate particles, lithium nickel cobalt aluminate particles, lithium-rich manganese-based material particles, lithium cobaltate particles, spinel lithium manganate LiMn2O4 particles and layered lithium manganate LiMnO2 particles. The ratio of the median particle diameter of lithium ferromanganese phosphate to that of the active particles is between 3 and 8. In the battery positive electrode material, the content of percentage by weight of the lithium ferromanganese phosphate is between 70% and 90%, and the content of percentage by weight of the active particles is between 10% and 30%.
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22.发明公开公开(公告)号：US20240128537A1
公开(公告)日：2024-04-18
申请号：US18532313
申请日：2023-12-07
Applicant: BYD COMPANY LIMITED
Inventor： Ke ZHANG , Na CHEN , Jiannian LI , Yi PAN , Zizhu GUO
IPC: H01M10/63 , H01M10/615 , H01M10/625 , H01M10/659 , H02J7/00
CPC classification number: H01M10/63 , H01M10/615 , H01M10/625 , H01M10/659 , H02J7/0047 , H01M2220/20
Abstract: A self-heating control method and a self-heating control system for a rechargeable battery are disclosed. The rechargeable battery includes a battery core. A separator is provided between a positive electrode and a negative electrode of the battery core. A reference electrode is correspondingly provided at the separator. A surface electrode is correspondingly provided on the negative electrode surface of the battery core. The method includes: detecting the potential difference between the reference electrode and the surface electrode, generating a charging current adjustment instruction according to the potential difference between the reference electrode and the surface electrode, and adjusting the charging current of the rechargeable battery according to the charging current adjustment instruction during the self-heating process of the rechargeable battery.
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23.发明公开公开(公告)号：US20240105962A1
公开(公告)日：2024-03-28
申请号：US18521727
申请日：2023-11-28
Applicant: BYD COMPANY LIMITED
Inventor： Yi PAN , Jing XIE , Zizhu GUO , Huajun SUN
IPC: H01M4/66 , H01M4/74 , H01M10/052 , H01M10/658
CPC classification number: H01M4/667 , H01M4/666 , H01M4/742 , H01M10/052 , H01M10/658 , H01M2004/027
Abstract: A current collector includes: a first polymer layer; a metal layer, the metal layer being disposed on a side of the first polymer layer; and a second polymer layer, the second polymer layer being disposed on a side of the metal layer far away from the first polymer layer; and in a direction from the first polymer layer to the second polymer layer, the current collector having a number of through-holes that penetrate the current collector.
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公开(公告)号：US20240097140A1
公开(公告)日：2024-03-21
申请号：US18524583
申请日：2023-11-30
Applicant: BYD COMPANY LIMITED
Inventor： Yanhui CUI , Yi PAN , Riguo MEI
CPC classification number: H01M4/742 , H01M4/0402 , H01M4/661 , H01M2004/021
Abstract: A current collector, an electrode sheet, and a fabrication method for a current collector are disclosed. The current collector includes a support layer, a first electrically conductive layer and a second electrically conductive layer. The support layer has a first surface and a second surface arranged opposite to each other. The first electrically conductive layer has a grid structure distributed on the first surface and/or the second surface of the support layer. The second electrically conductive layer is provided on a surface of the first electrically conductive layer away from the support layer.
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Patent Agency Ranking
25.发明公开公开(公告)号：US20230352671A1
公开(公告)日：2023-11-02
申请号：US18041663
申请日：2021-08-13
Applicant: BYD COMPANY LIMITED
Inventor： Na CHEN , Yecheng TIAN , Sanzhi CHEN , Rong HAO , Yi PAN
CPC classification number: H01M4/505 , H01M4/0404 , H01M4/0471 , H01M4/5825 , H01M4/525 , H01M4/131 , C01G53/50 , H01M2004/021
Abstract: Disclosed are a mixed positive electrode material, a positive electrode plate and a manufacturing method therefor, and a battery. The mixed positive electrode material includes: a ternary material and a phase change material, where the phase change material undergoes a phase change in a charging/discharging voltage range of the ternary material, the ternary material has a single crystal structure, and the phase change material has a single crystal structure or an aggregate structure; a mass fraction ratio of the ternary material to the phase change material is 70:30 to 99.8:0.2; and the ternary material has a nanohardness of 0.001-5 Gpa, and the phase change material has a nanohardness of 0.01-10 GPa.
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公开(公告)号：US20230307614A1
公开(公告)日：2023-09-28
申请号：US18205175
申请日：2023-06-02
Applicant: BYD COMPANY LIMITED
Inventor： Riguo MEI , Zhengjiao LIU , Xiaoya CHANG , Ziwen WU , Yi PAN
IPC: H01M4/36 , H01M10/0525 , H01M10/42 , H01M4/40 , H01M10/0585
CPC classification number: H01M4/366 , H01M10/0525 , H01M10/4235 , H01M4/405 , H01M10/0585 , H01M2220/20 , H01M2004/021
Abstract: A lithium-ion battery includes a cell including N battery unit, and at least one negative electrode lithium replenishing agent film that includes an independent lithium replenishing electrode including a current collector and a first metal lithium layer disposed on the current collector, or includes a second metal lithium layer laminated on a surface of a negative electrode material layer. An areal density σ of the metal lithium layer and a parameter θ satisfy certain relationships. Each of the N battery units includes a positive electrode plate, a negative electrode plate, and a separator sandwiched between the positive electrode plate and the negative electrode plate. The positive electrode plate comprises a positive electrode current collector and a positive electrode material layer disposed on the positive electrode current collector. The negative electrode plate includes a negative electrode current collector and a negative electrode material layer disposed on the negative electrode current collector.
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公开(公告)号：US20230268515A1
公开(公告)日：2023-08-24
申请号：US18309235
申请日：2023-04-28
Applicant: BYD COMPANY LIMITED
Abstract: A positive electrode active material of a lithium ion battery includes lithium manganese iron phosphate and a ternary material. A negative electrode active material is graphite. The lithium ion battery meets the following formulas:
1.08
≤
M
3
*
η
3
*
y
/
M
1
*
η
1
*
A
1
+
M
2
*
η
2
*
A
2
*
x
≤
1.12
and
0.49
≤
M
1
*
1
-
η
1
*
A
1
+
M
2
*
1
-
η
2
*
A
2
*
x
/
M
3
*
1
-
η
3
*
y
≤
1.15
where M1 is the first-charge specific capacity of lithium manganese iron phosphate; η1, is the initial efficiency of lithium manganese iron phosphate; A1 is the percent by mass of lithium manganese iron phosphate in the positive electrode active material; M2 is the first-charge specific capacity of the ternary material; η2 is the initial efficiency of the ternary material; A2 is the percent by mass of the ternary material in the positive electrode active material; M3 is the first-discharge specific capacity of graphite; η3 is the initial efficiency of graphite; and x and y are the coating amounts of the positive electrode active material and the negative electrode active material, respectively.-
公开(公告)号：US20230223534A1
公开(公告)日：2023-07-13
申请号：US18122538
申请日：2023-03-16
Applicant: BYD COMPANY LIMITED
Inventor： Na CHEN , Minghao ZHUANG , Rong HAO , Yi PAN
CPC classification number: H01M4/5825 , H01M4/364 , H01M4/136 , C01B25/45 , H01M2004/028
Abstract: A positive electrode material includes a first lithium manganese iron phosphate material in an aggregate form, a second and third lithium manganese iron phosphate materials in an aggregate and/or single-crystal-like form, and a fourth and fifth lithium manganese iron phosphate materials in a single-crystal-like form. A particle quantity ratio of the first to fifth lithium manganese iron phosphate materials is (0.8 to 1.2):(0.8 to 1.2):(1.6 to 2.4):(6.4 to 9.6):(6.4 to 9.6), and particle size D50 relationships satisfy: D505
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公开(公告)号：US20230115744A1
公开(公告)日：2023-04-13
申请号：US17914252
申请日：2021-03-23
Applicant: BYD COMPANY LIMITED
Inventor： Yongzhi PAN , Caiyun YE , Sanzhi CHEN , Yi PAN
IPC: H01M4/525 , H01M4/62 , H01M4/04 , H01M10/0525
Abstract: A lithium iron phosphate cathode sheet, a preparation method thereof, and a lithium iron phosphate lithium-ion battery are disclosed, wherein the lithium iron phosphate cathode sheet includes lithium iron phosphate particles, and in the lithium iron phosphate particles, in terms of particle number, a percentage of lithium iron phosphate particles with a particle size in the range of 50 nm-500 nm is 70-90%, a percentage of lithium iron phosphate particles with a particle size greater than 500 nm and less than 1000 nm is 5-20%, and a percentage of lithium iron phosphate particles with a particle size in the range of 1 μm-10 μm is 2-10%.
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