Battery module and charging module
A thin and compact battery module capable of suppressing an increase in temperature of the battery in the battery module when the battery is charged. The battery module 20 includes a power circuit 21 having a heat-generating multilayer inductor 21 A, a resin layer 22 in which the power circuit 21 is embedded, and a secondary cell arranged on the top face of the resin layer 22 . The resin layer 22 has multiple recesses 22 A in a portion that is in contact with the secondary cell 23.
1. A battery module, comprising:
a power circuit including a heat-generating circuit part;
a resin layer in which the power circuit is embedded; and
a battery cell disposed on one main face of the resin layer, the battery cell including a first main surface, a second main surface facing the first main surface, and side surfaces connecting the first and second main surfaces,
wherein dimensions of the first and second main surfaces are greater than that of the side surfaces, and substantially the entire first main surface of the battery cell covers a portion of the resin layer and forms an interface with said portion, and said portion includes a recess extending into the resin layer from the interface.
2. The battery module according to claim 1 ,
wherein the resin layer includes a plurality of recesses.
3. The battery module according to claim 1 ,
wherein the resin layer includes a heat dissipating plate and a heat-dissipation internal electrode, the heat dissipating plate being exposed at a surface of the resin layer and connected to the heat-generating circuit part, the heat-dissipation internal electrode being connected to the heat dissipating plate and disposed in the resin layer in the vicinity of the heat-generating circuit part.
4. The battery module according to claim 3 ,
wherein the heat dissipating plate is connected to the heat-dissipation internal electrode by a via hole conductor formed in the resin layer.
5. The battery module according to claim 1 ,
wherein the power circuit is capable of providing a charging current of 1 A or higher.
6. A charging module, comprising:
a battery module including:
a power circuit including a heat-generating circuit part;
a resin layer in which the power circuit is embedded; and
a battery cell disposed on one main face of the resin layer, the battery cell including a first main surface, a second main surface facing the first main surface, and side surfaces connecting the first and second main surfaces,
wherein dimensions of the first and second main surfaces are greater than that of the side surfaces, and substantially the entire first main surface of the battery cell covers a portion of the resin layer and forms an interface with said portion, and said portion includes a recess extending into the resin layer from the interface; and
a charging stand charging the battery cell in the battery module, wherein the charging stand includes a heat dissipating part.
7. The charging module according to claim 6 ,
wherein the heat dissipating part is made of a metal.
8. The charging module according to claim 6 ,
wherein the heat dissipating part is a Peltier element.
9. The charging module according to claim 6 , wherein the resin layer includes a heat dissipating plate and a heat-dissipation internal electrode, the heat dissipating plate being exposed at a surface of the resin layer and connected to the heat-generating circuit part, the heat-dissipation internal electrode being connected to the heat dissipating plate and disposed in the resin layer and in the vicinity of the heat-generating circuit part.
10. The charging module according to claim 9 , wherein the heat dissipating plate is connected to the heat-dissipation internal electrode by a via hole conductor formed in the resin layer.
11. The charging module according to claim 10 , wherein the power circuit is capable of providing a charging current of 1 A or higher.
12. The charging module according to claim 9 , wherein the power circuit is capable of providing a charging current of 1 A or higher.
13. The charging module according to claim 6 , wherein the power circuit is capable of providing a charging current of 1 A or higher.
14. The charging module according to claim 6 , wherein the resin layer comprises a plurality of recesses.
15. The charging module according to claim 14 , wherein the resin layer includes a heat dissipating plate and a heat-dissipation internal electrode, the heat dissipating plate being exposed at a surface of the resin layer and connected to the heat-generating circuit part, the heat-dissipation internal electrode being connected to the heat dissipating plate and disposed in the resin layer in the vicinity of the heat-generating circuit part.
16. The charging module according to claim 15 , wherein the heat dissipating plate is connected to the heat-dissipation internal electrode by a via hole conductor formed in the resin layer.
17. The charging module according to claim 16 , wherein the power circuit is capable of providing a charging current of 1 A or higher.