POWER OF ATTORNEY

        KNOW ALL MEN BY THESE PRESENTS, that the undersigned does hereby
constitute and appoint Joanne Ban and Jing Nealis as the undersigned's true and
lawful attorneys-in-fact to, as applicable:

    (1) execute for and on behalf of the undersigned, in the undersigned's
        capacity as an officer, director and/or ten-percent owner of SES AI
        Corporation (the "Company"), and submit to the U.S. Securities and
        Exchange Commission ("SEC") a Form ID, including amendments thereto,
        and any other documents necessary or appropriate to obtain codes and
        passwords enabling the undersigned to make electronic filings with the
        SEC of reports required by Section 16(a) of the Securities Exchange Act
        of 1934 (the "Exchange Act") and the rules thereunder and any
        amendments to the foregoing;

    (2) execute for and on behalf of the undersigned, in the undersigned's
        capacity as an officer, director and/or ten-percent owner of the
        Company, Forms 3, 4 and 5 in accordance with Section 16(a) of the
        Exchange Act and the rules thereunder and any amendments to the
        foregoing;

    (3) do and perform any and all acts for and on behalf of the undersigned
        which may be necessary or desirable to complete and execute any such
        Forms 3, 4 or 5, complete and execute any amendment or amendments
        thereto, and timely file such form with the SEC and any stock exchange
        or similar authority; and

    (4) take any other action of any type whatsoever in connection with the
        foregoing which, in the opinion of such attorney-in-fact, may be of
        benefit to, in the best interest of, or legally required by, the
        undersigned, it being understood that the documents executed by such
        attorney-in-fact on behalf of the undersigned pursuant to this Power of
        Attorney shall be in such form and shall contain such terms and
        conditions as such attorney-in-fact may approve to such attorney-in-
        fact's discretion.

The undersigned hereby grants to each such attorney-in-fact full power and
authority to do and perform any and every act and thing whatsoever requisite,
necessary, or proper to be done in the exercise of any of the rights and powers
herein granted, as fully to all intents and purposes as the undersigned might
or could do if personally present, with full power of substitution or
revocation, hereby ratifying and confirming all that such attorney-in-fact, or
such attorney-in-fact's substitute or substitutes, shall lawfully do or cause
to be done by virtue of this Power of Attorney and the rights and powers herein
granted. The undersigned acknowledges that the foregoing attorneys-in-fact, in
serving in such capacity at the request of the undersigned, are not assuming,
nor is the Company assuming, any of the undersigned's responsibilities to
comply with Section 16 of the Exchange Act.

This Power of Attorney shall remain in full force and effect until the
undersigned is no longer required to file Forms 3, 4 and 5, as applicable, with
respect to the undersigned's holdings of and transactions in securities issued
by the Company, unless earlier revoked by the undersigned in a signed writing
delivered to the foregoing attorneys-in-fact.

    IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be
executed as of the 19th day of January, 2022.

                                   By: /s/ Qichao Hu
                                       -------------------------------
                                       Dr. Qichao Hu