use \Bitrix\Main\Data\Cache;
// получаем экземпляр класса c конфигурацией cache_config_name
$cache = Cache::createInstance('cache_config_name'); 

'cache' => [
   'value' =>
      [
         'default' => [
            'type' => [
               'class_name' =>
                  '\\Bitrix\\Main\\Data\\CacheEngineFiles'
            ]
         ],
         'cache_config_name' => [
            'type' => [
               'class_name' =>
                  '\\Bitrix\\Main\\Data\\CacheEngineRedis',
               'extension' => 'redis'
            ],
            'redis' => [
               'host' => '127.0.0.1',
               'port' => '6379'
            ]
         ],
         'sid' => $_SERVER["DOCUMENT_ROOT"]."#01"
      ]