vk.com/club152685050 | vk.com/id446425943		Setup and Solution
N-Tab zone:	n_tabzone_3
Active zone:	cell_3
P-Tab zone:	p_tabzone_3
-----------------------------------
Busbar zone 1: bar1
Busbar zone 2: bar2
Active zone list at	odd level: cell_1 cell_3
Active zone list at	even level: cell_2

Number of battery seriel =3; Number of parallel per serial=1

****************END OF BATTERY CONNECTION INFO**************

g.Verify that the connection information is correct. If an error message appears or if the connections are not what you want, redefine the conductive zones in the Conductive Zones tab (Figure 26.3: Conductive Zones (p. 869)). Repeat this process until you confirm that the battery connections are set correctly.

Important

To set a valid connection, you must connect the negative tab to the positive tab through conductive zones.

h.Click OK to close the MSMD Battery Model dialog box.

In the background, Fluent automatically hooks all the necessary UDFs for the problem.

i.Click OK to close the Information dialog box.

26.4.4.2. Defining New Materials

Define the new e_material material for all the battery’s cells and busbar_material material for the battery pack’s busbars and tabs.

Important

For the battery active material, you must define the electric conductivity via the UDS diffusivity on a per-scalar basis. ANSYS Fluent will use these two UDS scalars to solve the differential equations; for details, see the Fluent Advanced Add-On Modules documentation.

For the battery passive material(s), you must define the UDS diffusivity using a user-defined function (UDF).

1. Create the electric material.

Setup → Materials → Solid → aluminum Edit...

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vk.com/club152685050Simulating a 1P3S Battery| vkPack.com/id446425943Using the MSMD Battery Model

a.In the Create/Edit Materials dialog box, enter e_material for Name and e for Chemical Formula.

b.Set Thermal Conductivity to 20.

c.Under Properties, ensure that define-per-uds is selected from the UDS Diffusivity drop-down list and click Edit... next to UDS Diffusivity.

d.In the UDS Diffusion Coefficients dialog box, set the constant value of 1.0 e6 for the both user-defined scalars.

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Setup and Solution

i.Select uds-0 in the User-Defined Scalar Diffusion list.

ii.Retain constant from the Coefficient drop-down list.

iii.Set 1.0 e6 [s/m] for Coefficient.

iv.In a similar way, set uds-1 to 1.0 e6 and close the UDS Diffusion Coefficients dialog box.

Note

•The units for UDS Diffusivity are s/m, and cannot be modified.

•In this tutorial, the electric conductivities are the same for the two scalars UDS0 and UDS1, so you will need to define only one material for all cell zones. If the electric conductivities are different for positive and negative electrodes, you will need to define two different materials, as described in the Fluent Advanced Add-On Modules documentation.

v.In the Question dialog box, click No to retain aluminum and add the new material (e_material) to the materials list.

e.Ensure that e_material (e) is selected from the Fluent Solid Materials drop-down list.

f.Close the Create/Edit Material dialog box.

Note

If the UDS Diffusion Coefficients are defined through the defined-per-uds option, the Fluent solver does not use the value for Electrical Conductivity.

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2.Create the busbar_material material for busbars and tabs by modifying e-material you have created in the previous step.

Setup → Materials → Solid → e-material Edit...

As stated in the problem description, you will use the same material for busbars and tabs.

Note

If the busbar and tab materials are different, you need to define the two different materials and assign them to the busbars and tabs, respectively.

The UDS Diffusivity for both busbar and tab materials must be defined through the UDF as described below.

a.In the Create/Edit Materials dialog box, enter busbar_material for Name and bus for Chemical Formula.

b.Under Properties, select user-defined from the UDS Diffusivity drop-down list.

c.In the User-Defined Functions dialog box that opens, verify that battery_e_cond::msmdbatt is selected and click OK.

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874	of ANSYS, Inc. and its subsidiaries and affiliates.