# US 12,119,508 B2 · Battery module unit, battery module, energy storage system, and electric vehicle

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- Number: US 12,119,508 B2
- Document ID: US12119508B2
- Status: Granted
- Kind: B2
- Application number: 17/281,470
- Filed: 2020-09-29
- Published: 2021-11-18
- Granted: 2024-10-15
- Earliest claimed: 2019-09-29
- Assignees: Dongguan Amperex Technology Limited
- Applicants: Dongguan Amperex Technology Limited
- Inventors: Mingjie Wu; Xin Wang
- Web page: https://patentgrep.com/patent/US12119508B2

## CPC

- H01M 50/262: with fastening means, e.g. locks
- B60L 50/64: Constructional details of batteries specially adapted for electric vehicles
- H01M 50/209: adapted for prismatic or rectangular cells (H01M50/216 takes precedence)
- H01M 50/233: characterised by physical properties of casings or racks, e.g. dimensions
- H01M 50/242: adapted for protecting batteries against vibrations, collision impact or swelling
- H01M 50/244: Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
- 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 50/264: for cells or batteries, e.g. straps, tie rods or peripheral frames
- H01M 50/269: Mechanical means for varying the arrangement of batteries or cells for different uses, e.g. for changing the number of batteries or for switching between series and parallel wiring (methods or arrangements for servicing or maintenance H01M6/50, H01M10/42)
- H01M 2220/20: Batteries in motive systems, e.g. vehicle, ship, plane
- Y02E 60/10: Energy storage using batteries
- Y02T 10/70: Energy storage systems for electromobility, e.g. batteries
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- B60L: PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES (arrangements or mounting of electrical propulsion units or of plural diverse prime-movers for mutual or common propulsion in vehicles B60K1/00, B60K6/20; arrangements or mounting of electrical gearing in vehicles B60K17/12, B60K17/14; preventing wheel slip by reducing power in rail vehicles B61C15/08; dynamo-electric machines H02K; control or regulation of electric motors H02P); SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES (electric coupling devices combined with mechanical couplings of vehicles B60D1/64; electric heating for vehicles B60H1/00); ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL (control or regulation of electric motors H02P); MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

A battery module unit including a plurality of sequentially stacked first brackets and a plurality of battery cells. Each first bracket includes a bracket body. A first battery cell group and second battery cell group disposed the opposite side of the first bracket. A connecting structure is disposed at one end of a plurality of the bracket bodies. A fastener is disposed on the first fixing bracket and is fixed to a sidewall of the connecting structure to fix the connecting structure to the first fixing bracket in a stacking direction. The first battery cell group is symmetric to the second battery cell group around a symmetric central axis of the first fixing bracket or around a symmetric central axis of a plurality of the first fixing brackets.

## Claims

### Claim 1

A battery module unit, configured to form a battery module, wherein the battery module unit comprises:
a plurality of sequentially stacked first brackets and a plurality of battery cells, wherein each first bracket comprises a bracket body, and a battery cell is accommodated between two adjacent bracket bodies;
the plurality of first brackets comprise at least one first fixing bracket, and the at least one first fixing bracket is disposed between other first brackets;
at least one battery cell on one side of the first fixing bracket forms a first battery cell group;
at least one battery cell on an other side of the first fixing bracket forms a second battery cell group;
a connecting structure is disposed at one end of a plurality of the bracket bodies,
a fastener is disposed on the bracket body of the first fixing bracket, and the fastener of the first fixing bracket is fixed to the connecting structure to fix the connecting structure to the first fixing bracket in a first direction, wherein the first direction is a stacking direction of the plurality of first brackets,
the first battery cell group is symmetric to the second battery cell group around a symmetric central axis of the first fixing bracket, or the first battery cell group is symmetric to the second battery cell group around a symmetric central axis of a plurality of the first fixing brackets,
a busbar configured to connect tabs of the battery cell, and the busbar is fixed to the connecting structure,
a positioning pin is disposed on at least one first bracket, and a corresponding positioning hole is disposed on the connecting structure; and
the positioning pin is configured to run through the corresponding positioning hole,
wherein the positioning pin is configured to move a preset distance in the positioning hole along a direction parallel to the first direction.

### Claim 2 (depends on 1)

The battery module unit according to claim 1, wherein a quantity of battery cells in the first battery cell group is equal to that in the second battery cell group.

### Claim 3 (depends on 2)

The battery module unit according to claim 2, wherein the fastener comprises a first bulge;
a first positioning slot corresponding to the first bulge is disposed on a sidewall of the connecting structure, and the first positioning slot fits with and is fixed to the first bulge.

### Claim 4 (depends on 3)

The battery module unit according to claim 3, wherein the fastener comprises a second bulge;
the second bulge and the first bulge are located on two sides of the bracket body respectively;
a second positioning slot corresponding to the second bulge is disposed on one side of the connecting structure away from the first positioning slot, and the second positioning slot fits with and is fixed to the second bulge.

### Claim 5 (depends on 1)

The battery module unit according to claim 1, wherein each first bracket comprises the fastener, the fastener comprises a first bulge and a clasp, the first bulge and the clasp are located on two sides of the connecting structure respectively, the first bulge abuts against the connecting structure, and the clasp is clasped with the connecting structure.

### Claim 6 (depends on 5)

The battery module unit according to claim 5, wherein the clasp comprises two intersecting abutting surfaces;
one of the abutting surface) and the bracket body abut on two opposite sides of the connecting structure in opposite directions; and
the other abutting surface and the first bulge abut on the two opposite sides of the connecting structure in opposite directions.

### Claim 7 (depends on 1)

The battery module unit according to claim 1, wherein the battery module unit further comprises two second brackets, the two second brackets are disposed on two sides of the plurality of first brackets along the first direction, and the battery cell is accommodated between each second bracket and an adjacent first bracket;
a protruding portion is disposed on the second bracket; and
two lugs are disposed on two sides of the connecting structure along the first direction respectively, and the two lugs are fixed to the protruding portion of the second bracket respectively.

### Claim 8 (depends on 1)

The battery module unit according to claim 1, wherein at least one set of notch and inset are disposed on both sides of the bracket body of the first bracket along the first direction; and
the notch of the first bracket is able to fit with an inset of another adjacent first bracket.

### Claim 9 (depends on 8)

The battery module unit according to claim 8, wherein notches and insets are symmetrically disposed on sidewalls of the bracket body located on two sides of the connecting structure, and the notches and the insets located on two sides of each sidewall are symmetrically distributed; of two adjacent first brackets, one is mounted by rotating 180° against the other in a plane perpendicular to the first direction.

### Claim 10 (depends on 8)

The battery module unit according to claim 8, wherein each first bracket comprises the fastener, and the fastener comprises a clasp;
the clasp comprises two intersecting abutting surfaces, one of the abutting surfaces and the bracket body abut on two opposite sides of the connecting structure in opposite directions; and
the other abutting surface of two clasps located on two sides of the connecting structure abut on the two opposite sides of the connecting structure in opposite directions.

### Claim 11 (depends on 1)

The battery module unit according to claim 1, wherein a first positioning pin is disposed on one first bracket disposed one side of first fixing bracket, and a corresponding positioning hole is disposed on the connecting structure, the first positioning pin is configured to run through the corresponding positioning hole;
a second positioning pin is disposed on another first bracket disposed on another side of the first fixing bracket, and a corresponding positioning hole is disposed on the connecting structure, the second positioning pin is configured to run through the corresponding positioning hole.

### Claim 12 (depends on 11)

The battery module unit according to claim 11, wherein the first positioning pin and the second positioning pin are symmetric around a symmetric central axis of the first fixing bracket, or the first positioning pin and the second positioning pin are symmetric around a symmetric central axis of a plurality of the first fixing brackets; both of the first positioning pin and the second positioning pin are configured to move a preset distance in the positioning hole along the direction parallel to the first direction.

### Claim 13 (depends on 1)

The battery module unit according to claim 1, wherein a collection terminal is further disposed on the busbar, and the collection terminal is located on one side of the busbar.

### Claim 14 (depends on 1)

The battery module unit according to claim 1, wherein the busbar is connected to the fixing bracket by hot melting or by an adhesive or screw threads.

### Claim 15 (depends on 1)

A battery module, comprising at least one battery module unit and a binding tape, wherein the binding tape is disposed outside the at least one battery module unit to fix the battery module unit, wherein the battery module unit is the battery module unit according to claim 1.

### Claim 16 (depends on 1)

An energy storage system, wherein the energy storage system comprises the battery module unit according to claim 1.

### Claim 17 (depends on 1)

An electric vehicle, wherein the electric vehicle comprises the battery module unit according to claim 1.