Composite end plate for battery module and battery module

1. A composite end plate for a battery module, comprising:

a rigid substrate, which has a first surface and a second surface that are opposite in a thickness direction of the rigid substrate, the first surface is disposed facing batteries; and

a rigid connecting plate, which comprises a connecting portion and a hook portion that is bent toward the connecting portion, the hook portion is embedded in the rigid substrate to connect the rigid connecting plate to the rigid substrate, the connecting portion is located on the second surface for connecting and fixing with an external structural member, and a material of the rigid connecting plate is different from that of the rigid substrate,

wherein the hook portion includes a first extending segment extending in the thickness direction of the rigid substrate and a second extending segment extending in a length direction of the rigid substrate, and the hook portion is connected to the connecting portion by the first extending segment, and the second extending segment and the connecting portion are both located on a side of the first extending segment facing away from a central axis, in the length direction, of the rigid substrate.

2. The composite end plate according to claim 1 , wherein,

the rigid substrate and the rigid connecting plate are both made of metal; or

the rigid substrate is made of non-metal, and the rigid connecting plate is made of metal.

3. The composite end plate according to claim 1 , wherein,

the connecting portion is fixedly connected to the rigid substrate by a fastener, a through hole extending in the thickness direction is provided in the rigid substrate, a connecting hole corresponding to the through hole is provided in the connecting portion, and the fastener passes through the connecting hole and the through hole to connect and fix the connecting portion with the rigid substrate.

4. The composite end plate according to claim 1 , wherein

the number of the rigid connecting plate is two, and the two rigid connecting plates are spaced apart in a length direction of the rigid substrate.

5. The composite end plate according to claim 4 , wherein

the hook portions of the two rigid connecting plates are oppositely disposed, and the two rigid connecting plates are symmetrically disposed with respect to the central axis of the rigid substrate.

6. The composite end plate according to claim 1 , wherein

the rigid substrate includes a positioning groove which is shaped to match the hook portion, the positioning groove extends in a height direction of the rigid substrate, and the hook portion can be inserted into the positioning groove along the height direction.

7. The composite end plate according to claim 6 , wherein

the rigid substrate further comprises a receiving groove which is shaped to match the connecting portion, the receiving groove is recessed from the second surface toward the first surface and is communicated with the positioning groove, the connecting portion is recessed into the receiving groove, and a surface of the connecting portion facing away from the rigid substrate is flush with the second surface.

8. The composite end plate according to claim 1 , wherein

the connecting portion includes a first straight segment, an intermediate transition segment, and a second straight segment that are successively arranged, the intermediate transition segment is disposed to intersect the first straight segment, the second straight segment is disposed in parallel with the first straight segment and is connected to the intermediate transition segment, the connecting portion is connected to the hook portion by the first straight segment, and the connecting portion is fixedly connected to the rigid substrate by the second straight segment.

9. A battery module, comprising:

a plurality of batteries, which are arranged side by side; and

a fixing frame, which is disposed around an periphery of all the batteries, the fixing frame comprises two composite end plates according to claim 1 and two side plates, the composite end plates and the side plates are alternately disposed around the plurality of the batteries, and the side plates are made of the same material as the rigid connecting plates and are fixedly connected to the connecting portions.