The present disclosure provides a battery box, the battery box comprises a box body, batteries, an insulating film and an adhesive. Each battery comprises a case. The insulating film covers the case of each battery and is provided with an opening. The adhesive is provided between the battery and the box body. The σ 1 , σ 2 , A 1 and A meet a following relationship A - A 1 A · σ 2 + A 1 A · σ 1 ≥ 7.2 Mpa . The insulating film ensures the insulation performance, and because the insulating film is provided with the opening, a portion of the adhesive bonds the case to the box body at the opening, a portion of the adhesive bonds the insulating film to the box body at the outside of the opening, therefore the bonding strength between the battery and the box body is improved, thereby improving the overall strength. Moreover, because σ 1 , σ 2 , A 1 and A meet the above relationship, the battery box ensures the safety performance.
1. A battery box, comprising:
a box body;
a plurality of batteries arranged side by side in a longitudinal direction and accommodated in the box body, and each battery comprising a case;
an insulating film covering and fixed to an outside of the case of each battery, and an opening being provided on the insulating film to make a corresponding portion of the case expose to the insulating film; and
an adhesive provided between the battery and the box body and used to fix each battery to the box body;
wherein
a bonding strength of the case of the battery bonded to the box body by the adhesive is σ 1 , a bonding strength of the insulating film bonded to the box body by the adhesive is σ 2 , an area of the opening of the insulating film is A 1 , a total area of a surface of the case on a side corresponding to the opening is A, and σ 1 , σ 2 , A 1 and A meet a following relationship:
A
-
A
1
A
·
σ
2
+
A
1
A
·
σ
1
≥
7.2
Mpa
.
2. The battery box according to claim 1 , wherein
A
-
A
1
A
·
σ
2
+
A
1
A
·
σ
1
≥
7.7
Mpa
.
3. The battery box according to claim 1 , wherein A 1 and A need to meet the relationship: A 1 /A>50%.
4. The battery box according to claim 1 , wherein A 1 /A≤70%.
5. The battery box according to claim 1 , wherein
the insulating film is made of polypropylene, polycarbonate or polyethylene terephthalate;
the bonding strength of the insulating film bonded to the box body by the adhesive σ 2 is no more than 1.8 Mpa.
6. The battery box according to claim 1 , wherein
the case of the battery is made of aluminum;
the bonding strength of the case of the battery bonded to the box body by the adhesive σ 1 is no less than 9 Mpa.
7. The battery box according to claim 1 , wherein the material of the adhesive is a one-component polyurethane or a two-component polyurethane.
8. The battery box according to claim 1 , wherein the material of the adhesive is a one-component epoxy resin or a two-component epoxy resin.
9. The battery box according to claim 1 , wherein
the case of each battery comprises a bottom face;
the opening is positioned below the bottom face of the case in an up-down direction and makes a part of the bottom face of the case expose to the insulating film.
10. The battery box according to claim 1 , wherein
the case of each battery comprises a side face;
the opening is positioned outside the side face of the case in a transversal direction and makes a part of the side face of the case expose to the insulating film.
11. A vehicle, comprising a battery box, wherein
the battery box comprises a box body, a plurality of batteries, an insulating film and an adhesive;
the plurality of batteries is arranged side by side in a longitudinal direction and accommodated in the box body, and each battery comprising a case;
the insulating film covers and is fixed to an outside of the case of each battery, and an opening is provided on the insulating film to make a corresponding portion of the case expose to the insulating film;
the adhesive is provided between the battery and the box body and used to fix each battery to the box body;
wherein a bonding strength of the case of the battery bonded to the box body by the adhesive is σ 1 , a bonding strength of the insulating film bonded to the box body by the adhesive is σ 2 , an area of the opening of the insulating film is A 1 , a total area of a surface of the case on a side corresponding to the opening is A, and σ 1 , σ 2 , A 1 and A meet a following relationship:
A
-
A
1
A
·
σ
2
+
A
1
A
·
σ
1
≥
7.2
Mpa
.
12. The vehicle according to claim 11 , wherein
A
-
A
1
A
·
σ
2
+
A
1
A
·
σ
1
≥
7.7
Mpa
.
13. The vehicle according to claim 11 , wherein A 1 and A need to meet the relationship: A 1 /A>50%.
14. The vehicle according to claim 11 , wherein A 1 /A≤70%.
15. The vehicle according to claim 11 , wherein
the insulating film is made of polypropylene, polycarbonate or polyethylene terephthalate;
the bonding strength of the insulating film bonded to the box body by the adhesive σ 2 is no more than 1.8 Mpa.
16. The vehicle according to claim 11 , wherein
the case of the battery is made of aluminum;
the bonding strength of the case of the battery bonded to the box body by the adhesive σ 1 is no less than 9 Mpa.
17. The vehicle according to claim 11 , wherein the material of the adhesive is a one-component polyurethane or a two-component polyurethane.
18. The vehicle according to claim 11 , wherein the material of the adhesive is a one-component epoxy resin or a two-component epoxy resin.
19. The vehicle according to claim 11 , wherein
the case of each battery comprises a bottom face;
the opening is positioned below the bottom face of the case in an up-down direction and makes a part of the bottom face of the case expose to the insulating film.
20. The vehicle according to claim 11 , wherein
the case of each battery comprises a side face;
the opening is positioned outside the side face of the case in a transversal direction and makes a part of the side face of the case expose to the insulating film.