Please don't panic. While you don't have as many rights in law as you would if you were married, the family courts have the power to make provision for your children which could extend to you being able to remain with them in the home their father owns in his sole name until the youngest attains their majority at age 18.
However, as cases are considered on their individual merits, you are best advised to seek legal advice to find out what steps you can take to secure your position/that of your dc and if you can establish that you have contributed to the mortgage/renovation/outgoings on the property at any time you may have the right to a share of the equity when/if it is sold.
In the meantime please know that if he were to put you out on the street, so to speak, your local authority's housing department will have a statutory duty in law to house you and your dc. Depending on whereabouts you are in the UK, this may initially take the form of emergency accomodation in a b&b or similar and you may have to wait until a permanent council or housing association property can be made available to you.
As ps has suggested, contact Shelter for advice on your entitlement to council/social housing and also find your nearest Women's Aid service here
www.womensaid.org.uk/domestic-abuse-directory/ and ask for recommendations for solicitors in your area who specialise in family law and have the necessary expertise to advise with regard to what entitlement you/your dc may have to remain in what is, presumably, the only home they have known -it's possible that you/the dc may be eligible for legal aid in this matter.
It could be that when he gets over himself his strop he'll be in a more reasonable frame of mind and all will be sweetness and light between you but, neverthless, I strongly urge you to seek advice as to you/the dcs' entitlements in law so that you can counter any further attempts on his part to wield power over you.