Battery module, battery box, and automobile

1. A battery module, comprising:

two or more battery cells;

a module frame, comprising an end plate and a side plate, wherein the end plate and the side plate form the module frame for fixing the battery cells; and

a cell management unit, disposed on the end plate and connected to a sampling line of the battery cells by using a connector assembly, wherein the cell management unit is fixed to an outer surface of the end plate, and the end plate has a first hollow groove for avoiding the connector assembly;

wherein the sampling line of the battery cells is a flexible circuit board.

2. The battery module according to claim 1 , wherein a first limiting element is disposed on both sides of the end plate, and the first limiting element protrudes from an outer surface of the end plate; and

two sides of the cell management unit are each against a first limiting element on the corresponding side.

3. The battery module according to claim 1 , wherein a second limiting element is disposed at the bottom of the end plate, and the second limiting element protrudes from an outer surface of the end plate; and

a lower edge of the cell management unit is against an upper surface of the second limiting element.

4. The battery module according to claim 1 , wherein the first hollow groove is located at a top of the end plate;

the connector assembly comprises a connection harness, a first connector, and a second connector, wherein the first connector and the second connector are disposed at two ends of the connection harness; and

the first connector is connected to the sampling line of the two or more battery cells, and the second connector is connected to the cell management unit.

5. The battery module according to claim 4 , wherein the cell management unit is provided with a second hollow groove, wherein the second hollow groove is opposite to the first hollow groove, and the second connector is disposed on an outer surface of the cell management unit.

6. The battery module according to claim 4 , wherein the cell management unit comprises a cell management circuit board and a circuit box, wherein the circuit box is fixed to the outer surface of the end plate, and the cell management circuit board is disposed in the circuit box.

7. The battery module according to claim 6 , wherein the circuit box is provided with a third limiting element, wherein the third limiting element protrudes from an outer surface of the circuit box; and

the third limiting element is located below the connection harness, and is against an outer wall of the connection harness.

8. The battery module according to claim 7 , wherein the third limiting element is provided with a fixing hole, and the connection harness is connected to the fixing hole of the third limiting element by using a fixing strap.

9. The battery module according to claim 1 , wherein an inner surface of the end plate is opposite to a large face of a battery cell at an end of the module frame.

10. A battery box, comprising a battery module and a battery management system, wherein the battery module further comprises:

two or more battery cells;

a module frame, comprising an end plate and a side plate, wherein the end plate and the side plate form the module frame for fixing the battery cells; and

a cell management unit, disposed on the end plate and connected to a sampling line of the battery cells by using a connector assembly, wherein the cell management unit is fixed to an outer surface of the end plate, and the end plate has a first hollow groove for avoiding the connector assembly;

wherein the sampling line of the battery cells is a flexible circuit board; and

the battery management system is connected to the cell management unit.

11. The battery box according to claim 10 , wherein a first limiting element is disposed on both sides of the end plate, and the first limiting element protrudes from an outer surface of the end plate; and

two sides of the cell management unit are each against a first limiting element on the corresponding side.

12. The battery box according to claim 10 , wherein a second limiting element is disposed at the bottom of the end plate, and the second limiting element protrudes from an outer surface of the end plate; and

a lower edge of the cell management unit is against an upper surface of the second limiting element.

13. The battery box according to claim 10 , wherein the first hollow groove is located at a top of the end plate;

the connector assembly comprises a connection harness, a first connector, and a second connector, wherein the first connector and the second connector are disposed at two ends of the connection harness; and

the first connector is connected to the sampling line of the two or more battery cells, and the second connector is connected to the cell management unit.

14. The battery box according to claim 10 , wherein an inner surface of the end plate is opposite to a large face of a battery cell at an end of the module frame.

15. An automobile, comprising a battery module, the battery module further comprising:

two or more battery cells;

a module frame, comprising an end plate and a side plate, wherein the end plate and the side plate form the module frame for fixing the battery cells; and

a cell management unit, disposed on the end plate and connected to a sampling line of the battery cells by using a connector assembly, wherein the cell management unit is fixed to an outer surface of the end plate, and the end plate has a first hollow groove for avoiding the connector assembly;

wherein the sampling line of the battery cells is a flexible circuit board.

16. The automobile according to claim 15 , wherein the automobile further comprises a battery management system, and the battery management system is connected to the cell management unit.