The present disclosure provides a battery box, the battery box comprises a box body, batteries, an insulating film and a 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 A 1 , A, L 1 , ρ 1 , L 2 and ρ 2 meet a following relationship: L 1 A 1 · ρ 1 · L 2 A - A 1 · ρ 2 L 1 A 1 · ρ 1 + L 2 A - A 1 · ρ 2 ≥ 10 M Ω . 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, it ensures the bonding strength between the battery and the box body. Meanwhile, it makes a covering area of the insulating film on the battery meet the requirement of the insulating strength, thereby ensuring the safety performance.
1. A battery box, comprising:
a box body;
a plurality of batteries being 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
an area of the opening is A 1 , a total area of a surface of the case corresponding to the opening is A, a thickness of the adhesive is L 1 , a volume resistivity of the adhesive is ρ 1 , a thickness of the insulating film is L 2 , a volume resistivity of the insulating film is ρ 2 , and A 1 , A, L 1 , ρ 1 , L 2 and ρ 2 meet a following relationship:
L
1
A
1
·
ρ
1
·
L
2
A
-
A
1
·
ρ
2
L
1
A
1
·
ρ
1
+
L
2
A
-
A
1
·
ρ
2
≥
10
M
Ω
.
2. The battery box according to claim 1 , wherein
L
1
A
1
·
ρ
1
·
L
2
A
-
A
1
·
ρ
2
L
1
A
1
·
ρ
1
+
L
2
A
-
A
1
·
ρ
2
≥
150
M
Ω
.
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, and 0.1×10 14 Ω·cm≤ρ 2 ≤2×10 14 Ω·cm.
6. The battery box according to claim 1 , wherein 0<L 1 ≤2 mm.
7. The battery box according to claim 1 , wherein 0<L 2 ≤0.15 mm.
8. The battery box according to claim 1 , wherein the material of the adhesive is a one-component polyurethane or a two-component polyurethane.
9. 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.
10. 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.
11. 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.
12. 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 comprises 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 an area of the opening is A 1 , a total area of a surface of the case corresponding to the opening is A, a thickness of the adhesive is L 1 , a volume resistivity of the adhesive is ρ 1 , a thickness of the insulating film is L 2 , a volume resistivity of the insulating film is ρ 2 , and A 1 , A, L 1 , ρ 1 , L 2 and ρ 2 meet a following relationship:
L
1
A
1
·
ρ
1
·
L
2
A
-
A
1
·
ρ
2
L
1
A
1
·
ρ
1
+
L
2
A
-
A
1
·
ρ
2
≥
10
M
Ω
.
13. The vehicle according to claim 12 , wherein
L
1
A
1
·
ρ
1
·
L
2
A
-
A
1
·
ρ
2
L
1
A
1
·
ρ
1
+
L
2
A
-
A
1
·
ρ
2
≥
150
M
Ω
.
14. The vehicle according to claim 12 , wherein A 1 and A need to meet the relationship: A 1 /A>50%.
15. The vehicle according to claim 12 , wherein A 1 /A≤70%.
16. The vehicle according to claim 12 , wherein
the insulating film is made of polypropylene, polycarbonate or polyethylene terephthalate, and 0.1×10 14 Ω·cm≤ρ 2 ≤2×10 14 Ω·cm.
17. The vehicle according to claim 12 , wherein 0<L 1 ≤2 mm.
18. The vehicle according to claim 12 , wherein 0<L 2 ≤0.15 mm.
19. The vehicle according to claim 12 , wherein the material of the adhesive is a one-component polyurethane or a two-component polyurethane.
20. The vehicle according to claim 12 , wherein the material of the adhesive is a one-component epoxy resin or a two-component epoxy resin.