# US 12,113,162 B2 · Battery comprising first-type battery cell group and second-type battery cell group which are connected in series, apparatus, and method and device for manufacturing battery

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- Number: US 12,113,162 B2
- Document ID: US12113162B2
- Status: Granted
- Kind: B2
- Application number: 17/556,991
- Filed: 2021-12-20
- Published: 2022-04-14
- Granted: 2024-10-08
- Earliest claimed: 2020-04-30
- Assignees: Contemporary Amperex Technology Co., Limited
- Applicants: Contemporary Amperex Technology Co., Limited
- Inventors: Qian Liu; Yonghuang Ye; Chengdu Liang; Haizu Jin; Quanguo Li
- Web page: https://patentgrep.com/patent/US12113162B2

## CPC

- H01M 10/04: Construction or manufacture in general (H01M10/058, H01M10/12, H01M10/28, H01M10/38 take precedence)
- H01M 16/00: Structural combinations of different types of electrochemical generators
- H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
- H01M 10/42: Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells (H01M10/60 takes precedence)
- H01M 10/625: Vehicles
- H01M 50/204: Racks, modules or packs for multiple batteries or multiple cells
- H01M 50/249: specially adapted for aircraft or vehicles, e.g. cars or trains (constructional details of batteries specially adapted for electric vehicles B60L50/64)
- H01M 50/258: Modular batteries; Casings provided with means for assembling
- H01M 50/267: having means for adapting to batteries or cells of different types or different sizes
- H01M 50/509: characterised by the type of connection, e.g. mixed connections
- H01M 4/5825: {Oxygenated metallic salts or polyanionic structures, e.g. borates, phosphates, silicates, olivines}
- H01M 2220/20: Batteries in motive systems, e.g. vehicle, ship, plane
- Y02E 60/10: Energy storage using batteries
- Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

The present application provides a battery and an apparatus. The battery includes: a first-type battery cell group and a second-type battery cell group which are connected in series, wherein the first-type battery cell group is composed of multiple first-type batteries connected in parallel, and the second type battery cell group is composed of at least one second type battery cell connected in parallel; the first-type battery cell and the second-type battery cell are battery cells of different chemical systems, and the volume energy density of the first-type battery cell is less than that of the second-type battery cell; and the capacity Cap1 of the first-type battery cell group is greater than the capacity Cap2 of the second-type battery cell group, in which Cap1 is the sum of the capacities of the corresponding first-type battery cells, and Cap2 is the sum of the capacities of the corresponding second-type battery cells.

## Claims

### Claim 1

A battery, comprising:
a first-type battery cell group and a second-type battery cell group which are connected in series,
wherein the first-type battery cell group is composed of multiple first-type batteries connected in parallel, and the second type battery cell group is composed of at least one second type battery cell connected in parallel; the first-type battery cell and the second-type battery cell are battery cells of different chemical systems, and a volume energy density of the first-type battery cell is less than a volume energy density of the second-type battery cell;
a capacity Cap1 of the first-type battery cell group is greater than a capacity Cap2 of the second-type battery cell group, and wherein the capacity Cap1 of the first-type battery cell group and the capacity Cap2 of the second-type battery cell group satisfy the following condition: 0.01≤(Cap1/Cap2)−1≤0.5, in which the capacity Cap1 of the first-type battery cell group is the sum of the capacities of the corresponding first-type battery cells, and the capacity Cap2 of the second-type battery cell group is the sum of the capacities of the corresponding second-type battery cells;
wherein the first-type battery cell and the second-type battery cell satisfy at least one of the following conditions:
a ratio of a specific heat capacity C1 of the first-type battery cell to a specific heat capacity C2 of the second-type battery cell is 0.9≤C1/C2≤10, optionally, 1≤C1/C2≤6, and further optionally, 1.5≤C1/C2≤3;
a ratio of a heat conductivity coefficient λ1 of the first-type battery cell to a heat conductivity coefficient λ2 of the second-type battery cell is 0.5≤λ1/λ2≤3, optionally, 0.7≤λ1/λ2≤2, and further optionally, 0.9≤λ1/λ2≤1.5;
a plateau voltage V1 of the first-type battery cell is from 3.15 V±0.05 V to 4.75 V±0.05 V; a plateau voltage V2 of the second-type battery cell is from 3.60 to 3.80 V±0.05 V; or
a ratio of a density ρ1 of the first-type battery cell to a density ρ2 of the second-type battery cell is 0.6≤ρ1/ρ2≤3, optionally, 0.8≤ρ1/ρ2≤2, and further optionally, 0.9≤ρ1/ρ2≤1.5.

### Claim 2 (depends on 1)

The battery according to claim 1, wherein the first-type battery cell group and the second-type battery core group are arranged in at least one row, and at least part of the second-type battery cell is located between the two first-type battery cells.

### Claim 3 (depends on 1)

The battery according to claim 1, wherein the capacity Cap1 of the first-type battery cell group and the capacity Cap2 of the second-type battery cell group satisfy the following condition:
0.02≤(Cap1/Cap2)−1≤0.25, and optionally, 0.04≤(Cap1/Cap2)−1≤0.15.

### Claim 4 (depends on 1)

The battery according to claim 1, wherein a ratio of a capacity of the first-type battery cell to a capacity of the second-type battery cell is from 10% to 150%.

### Claim 5 (depends on 1)

The battery according to claim 1, wherein the first-type battery cell group comprises a first-type battery cells and the second-type battery cell group comprises b second-type battery cells; wherein a and b are natural numbers, and a≥1, b≥1, 0.1≤a/b≤50, optionally, 0.5≤a/b≤30, and further optionally, 1≤a/b≤10.

### Claim 6 (depends on 5)

The battery according to claim 5, wherein when a>1, the capacity Cap1 of all the first-type battery cell groups is the same; and/or, when b>1, the capacity Cap2 of all the second-type battery cell groups is the same.

### Claim 7 (depends on 1)

The battery according to claim 1, wherein the first-type battery cell is a lithium iron phosphate chemical-system battery cell.

### Claim 8 (depends on 1)

The battery according to claim 1, wherein the second-type battery cell is a ternary material chemical-system battery cell.

### Claim 9 (depends on 1)

An apparatus, comprising the battery according to claim 1, and using the battery as a power source.

### Claim 10

A method for manufacturing a battery, comprising:
obtaining multiple first-type battery cells and at least one second-type battery cell, wherein the first-type battery cell and the second-type battery cell are battery cells of different chemical systems and a volume energy density of the first-type battery cell is less than a volume energy density of the second-type battery cell;
connecting the multiple first-type battery cells in parallel to form a first-type battery cell group, and connecting the at least one second-type battery cell in parallel to form a second-type battery cell group, wherein a capacity Cap1 of the first-type battery cell group is greater than a capacity Cap2 of the second-type battery cell group, the capacity Cap1 of the first-type battery cell group is the sum of the capacities of the corresponding first-type battery cells, and the capacity Cap2 of the second-type battery cell group is the sum of the capacities of the corresponding second-type battery cells; and
connecting the first-type battery cell group and the second-type battery cell group in series;
wherein the first-type battery cell and the second-type battery cell satisfy at least one of the following conditions:
a ratio of a specific heat capacity C1 of the first-type battery cell to a specific heat capacity C2 of the second-type battery cell is 0.9≤C1/C2≤10, optionally, 1≤C1/C2≤6, and further optionally, 1.5≤C1/C2≤3;
a ratio of a heat conductivity coefficient λ1 of the first-type battery cell to a heat conductivity coefficient λ2 of the second-type battery cell is 0.5≤λ1/λ2≤3, optionally, 0.7≤λ1/λ2≤2, and further optionally, 0.9≤λ1/λ2≤1.5;
a plateau voltage V1 of the first-type battery cell is from 3.15 V±0.05 V to 4.75 V±0.05 V; a plateau voltage V2 of the second-type battery cell is from 3.60 to 3.80 V±0.05 V; or
a ratio of a density ρ1 of the first-type battery cell to a density ρ2 of the second-type battery cell is 0.6≤ρ1/ρ2≤3, optionally, 0.8≤ρ1/ρ2≤2, and further optionally, 0.9≤ρ1/ρ2≤1.5.

### Claim 11 (depends on 10)

The method according to claim 10, wherein connecting the multiple first-type battery cells in parallel to form a first-type battery cell group includes: connecting a plurality of first-type battery cells in parallel to form a first-type battery cell groups, a is a natural number, and a≥1;
connecting the at least one second-type battery cell in parallel to form a second-type battery cell group includes: connecting at least one second-type battery cell in parallel to form b second-type battery cell groups, b is a natural number, and b≥1,
wherein 0.1≤a/b≤50, optionally, 0.5≤a/b≤30, and further optionally, 1≤a/b≤10.

### Claim 12 (depends on 10)

The method according to claim 10, further comprising:
arranging the multiple first-type battery cells and the at least one second-type battery cell in at least one row, and locating at least a part of the second-type battery cells between the two first-type battery cells.