1. An electronic apparatus comprising:
a heat sink configured to mount a heating element and having an outer surface, the heat sink comprising a first projection projected from the outer surface;
a cooling fan configured to supply an airstream to the heat sink and comprising a fan housing having a first surface and a second surface opposite to the first surface, the first surface facing the outer surface of the heat sink, the fan housing including a first hole formed on the first surface, and a second hole formed on the second surface, the first projection being provided in the first hole; and
a housing of the electronic apparatus, the housing having an inner surface and comprising a second projection projected from the inner surface, the inner surface facing the second surface, the second projection being provided in the second hole, the housing containing the heat sink and the fan housing within the housing,
wherein the housing includes a first part and a second part, the first part and the second part being separate from one another, the second projection being provided on the first part, the housing further comprising a third projection projecting from the inner surface of the second part, and
wherein the fan housing includes a third hole formed on the second surface, the third projection being provided in the third hole.
2. The electronic apparatus according to claim 1, wherein the second projection of the housing is integrally formed with the housing as a one-piece unitary member, and wherein the first projection of the heat sink is integrally formed with the heat sink as a one-piece unitary member.
3. The electronic apparatus according to claim 1, wherein the housing includes a holder in contact with at least a part of an outer shape of the cooling fan, and wherein the holder is integrally formed with the housing as a one-piece unitary member.
4. The electronic apparatus according to claim 1, wherein the heat sink includes a recessed portion in contact with at least a part of an outer shape of the cooling fan, the cooling fan being provided in the recessed portion, and wherein the recessed portion of the heat sink is integrally formed with the heat sink as a one-piece unitary member.
5. An electronic apparatus comprising:
a heat sink configured to mount a heating element and having an outer surface, the heat sink comprising a first projection projected from the outer surface;
a cooling fan configured to supply an airstream to the heat sink and comprising a fan housing having a first surface and a second surface opposite to the first surface, the first surface facing the outer surface of the heat sink, the fan housing including a first recess formed on the first surface, and a second recess formed on the second surface, the first projection being provided in the first recess; and
a housing of the electronic apparatus, the housing having an inner surface and comprising a second projection projected from the inner surface, the inner surface facing the second surface, the second projection being provided in the second recess, the housing containing the heat sink and the fan housing within the housing,
wherein the housing includes a first part and a second part, the first part and the second part being separate from one another, the second projection being provided on the first part, the housing further comprising a third projection projecting from the inner surface of the second part, and
wherein the fan housing includes a third recess formed on the second surface, the third projection being provided in the third recess.
6. The electronic apparatus according to claim 5, wherein the second projection of the housing is integrally formed with the housing as a one-piece unitary member, and wherein the first projection of the heat sink is integrally formed with the heat sink as a one-piece unitary member.
7. The electronic apparatus according to claim 5, wherein the housing includes a holder in contact with at least a part of an outer shape of the cooling fan, and wherein the holder is integrally formed with the housing as a one-piece unitary member.
8. The electronic apparatus according to claim 5, wherein the heat sink includes a recessed portion in contact with at least a part of an outer shape of the cooling fan, the cooling fan being provided in the recessed portion, and wherein the recessed portion of the heat sink is integrally formed with the heat sink as a one-piece unitary member.
9. An electronic apparatus comprising:
a heat sink configured to mount a heating element and having an outer surface, the heat sink comprising a first projection projected from the outer surface;
a cooling fan configured to supply an airstream to the heat sink and comprising a fan housing having a first surface and a second surface opposite to the first surface, the first surface facing the outer surface of the heat sink, the fan housing including a hole formed on the first surface, and a recess formed on the second surface, the first projection being provided in one of the hole and the recess; and
a housing of the electronic apparatus, the housing having an inner surface and comprising a second projection projected from the inner surface, the inner surface facing the second surface, the second projection being provided in another of the hole and the recess, the housing containing the heat sink and the fan housing within the housing,
wherein the housing includes a first part and a second part, the first part and the second part being separate from one another, the second projection being provided on the first part, the housing further comprising a third projection projecting from the inner surface of the second part, and
wherein the fan housing includes an additional hole formed on the second surface, the third projection being provided in the additional hole.
10. The electronic apparatus according to claim 9, wherein the second projection of the housing is integrally formed with the housing as a one-piece unitary member, and wherein the first projection of the heat sink is integrally formed with the heat sink as a one-piece unitary member.
11. The electronic apparatus according to claim 9, wherein the housing includes a holder in contact with at least a part of an outer shape of the cooling fan, and wherein the holder is integrally formed with the housing as a one-piece unitary member.
12. The electronic apparatus according to claim 9, wherein the heat sink includes a recessed portion in contact with at least a part of an outer shape of the cooling fan, the cooling fan being provided in the recessed portion, and wherein the recessed portion of the heat sink is integrally formed with the heat sink as a one-piece unitary member.
13. The electronic apparatus according to claim 1, wherein
the fan housing includes a first recess and a second recess, the first recess being provided around the first hole, the second recess being provided around the second hole,
the second projection of the housing is provided in the second recess, and
the first projection of the heat sink and being provided in the first recess.
14. The electronic apparatus according to claim 13, wherein
the first projection of the heat sink is in contact with a bottom face of the first recess, and
the second projection of the housing is in contact with a bottom face of the second recess.
15. The electronic apparatus according to claim 5, wherein
the second projection of the housing is in contact with a bottom face of the second recess,
the first projection of the heat sink is in contact with a bottom face of the first recess.
16. The electronic apparatus according to claim 9, wherein
the second projection of the housing is provided in the recess and is in contact with a bottom face of the recess, and
the first projection of the heat sink is provided in the hole.
17. The electronic apparatus according to claim 9, wherein
the second projection of the housing is provided in the hole, and
the first projection of the heat sink is provided in the recess and is in contact with a bottom face of the recess.
18. The electronic apparatus according to claim 1,
wherein the fan housing includes a third hole formed on the first surface, and
wherein no projection is provided in the third hole.
19. The electronic apparatus according to claim 18,
wherein the fan housing includes a fourth hole formed on the second surface, the third hole and the fourth holes being connected through the fan housing, and
wherein the housing further comprising a third projection projecting from the inner surface, the third projection being provided in the fourth hole.
20. The electronic apparatus according to claim 1,
wherein the housing includes a first wall on which the second projection is provided, the first wall extending over the cooling fan and the heat sink,
wherein the housing further includes a second wall provided on a lateral side of the cooling fan and the heat sink, and
wherein the housing further includes a third wall provided on an opposite side of the cooling fan and the heat sink with respect to the second wall.
21. The electronic apparatus according to claim 1,
wherein the housing further comprises a protruding holder portion that protrudes from the inner surface and is fitted with a side surface of the fan housing.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A nonaqueous electrolyte solution for a secondary battery, comprising solute, phosphinic ester compound, and nonaqueous organic solvent containing them, wherein the content of the phosphinic ester compound is from 0.01% by weight to 4.5% by weight, based on the total weight of the nonaqueous electrolyte solution.
2. The nonaqueous electrolyte solution for a secondary battery according to claim 1, wherein the phosphinic ester is one selected from the group consisting of compounds represented by the following formula (1) and compounds represented by the following formula (2):
wherein R1 to R3 each independently represents one member selected from the group consisting of (i) a chain or cyclic alkyl group which has 1 to 8 carbon atoms and may be substituted with one or more halogen atoms, (ii) a phenyl group which may be substituted with one or more halogen atoms, (iii) a phenyl group which may be substituted with one or more alkyl groups having 1 to 4 carbon atoms, and (iv) a phenyl group which may be substituted with one or more halogen atoms and one or more alkyl groups having 1 to 4 carbon atoms, provided that when the pair of R1 and R2 or the pair of R2 and R3 is alkyl groups, then the groups may be bonded to each other to form a ring structure:
wherein R11 and R12 each independently represents a chain or cyclic alkyl group, which has 1 to 8 carbon atoms and may be substituted with one or more halogen atoms or a phenyl group which may be substituted with one or more halogen atoms, provided that when R11 and R12 each is an alkyl group, they may be bonded to each other to form a ring structure, L represents a connecting group having a valence of z and constituted of one or more atoms selected from the group consisting of a carbon atom, a hydrogen atom, and an oxygen atom, and z represents an integer of 2 to 8.
3. The nonaqueous electrolyte solution for a secondary battery according to claim 2, wherein in formula (1), R1 to R3 each independently represents one selected from the group consisting of (i) a chain alkyl group which has 1 to 8 carbon atoms and may be substituted with one or more halogen atoms, (ii) a phenyl group which may be substituted with one or more halogen atoms, (iii) a phenyl group which may be substituted with one or more alkyl groups having 1 to 4 carbon atoms, and (iv) a phenyl group which may be substituted with one or more halogen atoms and one or more alkyl groups having 1 to 4 carbon atoms.
4. The nonaqueous electrolyte solution for a secondary battery according to claim 2, wherein in formula (2), R11 and R12 each independently represents a chain alkyl group which has 1 to 4 carbon atoms and may be substituted with one or more halogen atoms, L represents a chain hydrocarbon connecting group having a valence of z and having 2 to 8 carbon atoms, and z represents an integer of 2 to 4.
5. The nonaqueous electrolyte solution for a secondary battery according to claim 1, wherein the nonaqueous electrolyte solution for a secondary battery further comprises an overcharge inhibitor or a film formation agent.
6. The nonaqueous electrolyte solution for a secondary battery according to claim 1, wherein the nonaqueous organic solvent in the nonaqueous electrolyte solution is a mixed solvent comprising a cyclic carbonate and a member selected from the group consisting of chain carbonates and cyclic esters.
7. A nonaqueous-electrolyte secondary battery comprising a negative electrode capable of absorbingreleasing lithium, a positive electrode, and the nonaqueous electrolyte solution for a secondary battery defined in claim 1.
8. The nonaqueous-electrolyte secondary battery according to claim 7, wherein the positive electrode comprises a lithium-transition metal composite oxide.
9. The nonaqueous-electrolyte secondary battery according to claim 7, wherein the negative electrode consists mainly of a carbonaceous material wherein the value of d for a lattice plane (002 plane) in X-ray diffraction is from 0.335 to 0.340 nm.