A battery pack includes a housing accommodating a plurality of batteries and a blower. A control unit manages the temperature of the batteries according to the battery temperature provided by a temperature detector. When the battery temperature becomes equal to or higher than a predetermined cooling required temperature, the control unit executes a cooling mode of operating the blower to cool the batteries. The control unit executes a temperature equalizing mode of operating the blower to equalize the temperature inside the housing by causing the fluid flowing through the circulation path even when the battery temperature is lower than the cooling required temperature and the cooling is unnecessary.

A heating device for a prismatic battery cell of a high-voltage battery of a motor vehicle includes two sheet-shaped heating elements to be arranged on two opposite lateral outer sides of a cell housing of the battery cell, and two connecting elements to be arranged on a housing cover of the cell housing. The connecting elements are electrically connected to terminals of the two heating elements. The connecting elements are flexibly formed, at least in certain regions, and as a result the heating elements are connected in a hinge-like manner. The heating device can be arranged by arranging the first heating element on the first lateral outer side of the cell housing, swinging the second heating element over the housing cover, and arranging the second heating element on the second lateral outer side on the cell housing.

The present disclosure provides a battery module and a battery pack. The battery pack comprises a box and a battery module, the battery module is accommodated in the box. The battery module comprises batteries sequentially arranged in a first direction. The battery comprises an electrode assembly, a case and a cap assembly, the electrode assembly is received in the case, and the cap assembly is connected with the case. The case comprises two first side walls, and the two first side walls are respectively positioned at two sides of the electrode assembly in the first direction. The first side walls of two adjacent batteries face each other. An area of the first side wall is defined as S.sub.1, a distance between the electrode assemblies of two adjacent batteries in the first direction is defined as D, S.sub.1 and D satisfying a relationship:

1.210.sup.5 mm.sup.1D/S.sub.150010.sup.5 mm.sup.31 1.

A battery module has a battery stack that includes a plurality of prismatic batteries and an inter-battery separator disposed between every two of the prismatic batteries adjacent to each other in an X direction along which the plurality of prismatic batteries is stacked. The inter-battery separator includes: a middle member having a plate shape; a first side plate-shaped member disposed on a first side of the middle member in the X direction and made of a material that is superior in thermal insulation to the middle member; and a second side plate-shaped member disposed on a second side of the middle member in the X direction and made of a material that is superior in thermal insulation to the middle member.

The present application relates to heat management and control of new energy vehicle, particularly to an active cooling power calibrating method and system for energy storing unit. The application aims at resolving the problem that the existing active cooling power calibrating experiment for energy storing unit executed in a wind tunnel cabin, is inefficient and costly. The active cooling power calibrating method for energy storing unit of the present application mainly comprises the steps of: improving inlet temperature of the energy storing unit to a target temperature with a heating device; cooling the energy storing unit with a cooling system in a way of maintaining the inlet temperature at the target temperature; calibrating parameters of the cooling system when the inlet temperature is kept stable at the target temperature. When the inlet temperature of the energy storing unit is heated to the target temperature by the heating device and maintained at the target temperature by the cooling system, and the parameters of the cooling system are calibrated, the active cooling power calibrating experiment for energy storing unit executed in a wind tunnel cabin, can be substantially simulated, even completely replaced, thereby reducing development cost and enhancing development efficiency.

The present application relates to heat management and control of new energy vehicle, particularly to an active cooling power calibrating method and system for energy storing unit. The application aims at resolving the problem that the existing active cooling power calibrating experiment for energy storing unit executed in a wind tunnel cabin, is inefficient and costly. The active cooling power calibrating method for energy storing unit of the present application mainly comprises the steps of: improving inlet temperature of the energy storing unit to a target temperature with a heating device; cooling the energy storing unit with a cooling system in a way of maintaining the inlet temperature at the target temperature; calibrating parameters of the cooling system when the inlet temperature is kept stable at the target temperature. When the inlet temperature of the energy storing unit is heated to the target temperature by the heating device and maintained at the target temperature by the cooling system, and the parameters of the cooling system are calibrated, the active cooling power calibrating experiment for energy storing unit executed in a wind tunnel cabin, can be substantially simulated, even completely replaced, thereby reducing development cost and enhancing development efficiency.

A battery pack includes a battery stack having a plurality of prismatic batteries being stacked. The battery pack further includes a cooling plate extending in a stack direction of the prismatic batteries in the battery stack. The cooling plate includes a plurality of coolant passages and a plurality of grooves. The coolant passages extend in a perpendicular direction substantially perpendicular to the stack direction of the prismatic batteries, and allow a coolant to flow in the coolant passages. The grooves constitute heat conduction inhibitors configured to inhibit heat conduction in the stack direction of the prismatic batteries.

A fluid-cooled battery system includes at least one battery module which includes a plurality of rows of battery cells, an outer casing, and at least one cell fixture. The outer casing defines therein an accommodation space. The cell fixture includes a holding web fitted inside the accommodation space, and formed with a plurality of rows of retaining holes. The retaining holes of each row are configured to retain cell bodies of a respective row of the battery cells so as to permit the battery cells to be held in the accommodation space by the holding web, to thereby keep the battery cells in stable position against undesired vibration.

A fluid-cooled battery system includes at least one battery module which includes a plurality of rows of battery cells, an outer casing, and at least one cell fixture. The outer casing defines therein an accommodation space. The cell fixture includes a holding web fitted inside the accommodation space, and formed with a plurality of rows of retaining holes. The retaining holes of each row are configured to retain cell bodies of a respective row of the battery cells so as to permit the battery cells to be held in the accommodation space by the holding web, to thereby keep the battery cells in stable position against undesired vibration.

A partition member which partitions between a pair of unit batteries or a partition member which partitions between a unit battery and a member other than the unit battery, the thermal resistances .sub.d1, .sub.d2, .sub.p1, and .sub.p2 defined as follows satisfy Expression below.

(.sub.p1/.sub.p2)/(.sub.d1/.sub.d2)1.010.sup.4