Battery pack and electric tool assembly

1. A battery pack, detachably coupled to an electric tool provided with housing terminals, the battery pack comprising:

a battery pack cover;

a battery pack base, joined to the battery pack cover to form a battery pack housing;

a cell group, configured to be charged and discharged, the cell group comprising several cells, and each cell being provided with a cell body portion, a first electrode terminal located on one side of the cell body portion, and a second electrode terminal located on the other side of the cell body portion;

a battery terminal connector, electrically connected to the cell group, the battery terminal connector comprising battery pack terminals electrically connectable to the housing terminals and a terminal base supporting the battery pack terminals;

a mounting cavity, defined in the battery pack housing, and accommodating the cell group and the battery terminal connector, the mounting cavity being formed with a socket for inserting the housing terminals to be electrically connected to the battery pack terminals; and

a lock configured to drive the battery pack and the electric tool to be in locked connection or released,

wherein a seal member blocking a passage from the socket to the cell group is disposed inside the mounting cavity,

wherein the battery pack further comprises a battery pack housing seal member blocking communication between the outside and the mounting cavity, and the battery pack housing seal member is disposed at a joint between the battery pack cover and the battery pack base,

wherein the seal member and battery pack housing seal member form waterproof seals,

wherein the lock is mounted on the battery pack housing, and the lock is isolated outside the mounting cavity, and

wherein the terminal base is constructed to be a waterproof box body, the waterproof box body is provided, in a direction facing the socket, with an opening for the housing terminals to pass through, and the seal member is sealed between an inner wall of the battery pack and the waterproof box body, to close an assembly gap between the waterproof box body and the inner wall of the battery pack.

2. The battery pack according to claim 1 , wherein the seal member is tightly pressed between the socket and the terminal base.

3. The battery pack according to claim 2 , wherein a thickness of the seal member in a free state is greater than a gap between the terminal base and the socket.

4. The battery pack according to claim 1 , wherein the socket is attached with the seal member, the seal member attached to the socket is disposed on an inner wall of the battery pack, the seal member is provided with a through hole, and the through hole is configured to have a structure that does not prevent the seal member from isolating the socket from the cell group for the housing terminal to pass through.

5. The battery pack according to claim 4 , wherein the seal member and the battery terminal connector that are located in the mounting cavity are disposed opposite each other.

6. The battery pack according to claim 1 , wherein the lock is detachably mounted on the battery pack cover and is movable relative to the battery pack cover, capable of driving the battery pack and the electric tool to be in locked connection or released, the battery pack housing is provided with a retaining cavity that is concave in an outer surface of the battery pack housing and at least partially surrounds the lock, the retaining cavity forms a movement space for the lock to move, and the retaining cavity and the mounting cavity are not in communication with each other.

7. The battery pack according to claim 1 , wherein the battery pack comprises an isolation member detachably connected to the battery pack housing and an isolation seal structure located between the isolation member and the battery pack housing, and the isolation member is concavely provided with a retaining cavity for accommodating the lock.

8. An electric tool assembly, comprising the battery pack according to claim 1 and an electric tool detachably connected to the battery pack, the electric tool comprising:

a housing;

a tool terminal connector, connected to the housing, the tool terminal connector comprising housing terminals and a base supporting the housing terminals; and

a functional member, having a motor providing a driving force to the electric tool.

9. The electric tool assembly according to claim 8 , wherein the electric tool is a high-pressure cleaner, and the housing comprises a handle for holding, a body portion disposed at an angle from the handle, a water inlet connected to an external water source, and a water outlet for discharging water.

10. The electric tool assembly according to claim 9 , wherein the body portion is disposed at one end of the handle, and the battery pack is disposed at the other end of the handle.

11. The electric tool assembly according to claim 8 , wherein the functional member comprises a pump driven by the motor to discharge water, and the functional member is disposed in the housing.

12. The electric tool assembly according to claim 9 , wherein a working water pressure at which the high-pressure cleaner discharges water is 0.3 Mpa to 5 Mpa.

13. The electric tool assembly according to claim 8 , wherein one or more battery packs are configured, and a voltage of each battery pack is 18 V to 42 V.

14. An electric tool assembly, comprising a battery pack and an electric tool detachably connected to the battery pack, the electric tool comprising:

a housing;

a tool terminal connector, connected to the housing, the tool terminal connector comprising housing terminals and a base supporting the housing terminals; and

a functional member, having a motor providing a driving force to the electric tool;

wherein the battery pack comprises:

a battery pack cover;

a battery pack base, joined to the battery pack cover to form a battery pack housing;

a cell group, configured to charged and discharged, the cell group comprising several cells, and each cell being provided with a cell body portion, a first electrode terminal located on one side of the cell body portion, and a second electrode terminal located on the other side of the cell body portion;

a battery terminal connector, electrically connected to the cell group, the battery terminal connector comprising battery pack terminals electrically connectable to the housing terminals and a terminal base supporting the battery pack terminals; and

a mounting cavity, defined in the battery pack housing, and accommodating the cell group and the battery terminal connector, the mounting cavity being formed with a socket for inserting the housing terminals to be electrically connected to the battery pack terminals,

wherein a seal member blocking a passage from the socket to the cell group is disposed inside the mounting cavity,

wherein the battery pack further comprises a battery pack housing seal member blocking communication between the outside and the mounting cavity, and the battery pack housing seal member is disposed at a joint between the battery pack cover and the battery pack base,

wherein the seal member and battery pack housing seal member form waterproof seals,

wherein the electric tool further comprises a lock configured to drive the battery pack and the electric tool to be in locked connection or released, and the lock is isolated outside the mounting cavity, and

wherein the terminal base is constructed to be a waterproof box body, the waterproof box body is provided, in a direction facing the socket, with an opening for the housing terminals to pass through, and the seal member is sealed between an inner wall of the battery pack and the waterproof box body, to close an assembly gap between the waterproof box body and the inner wall of the battery pack.