电芯连接组件、电池包以及车辆
By forming heat exchange channels inside the busbar and connecting them with insulating tubes, the problems of insufficient heat dissipation and short-circuit breakdown of the busbar are solved, achieving efficient heat dissipation and electrical safety of the battery pack.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XIAOMI EV TECH CO LTD
- Filing Date
- 2025-06-25
- Publication Date
- 2026-07-17
AI Technical Summary
In the prior art, due to space constraints, the current-carrying area and heat dissipation capacity of the busbars are insufficient, which increases the risk of thermal runaway of the battery pack under high current conditions, and there is a risk of short circuit or breakdown between adjacent busbars.
A heat exchange channel is formed inside the busbar, and the heat exchange channels of adjacent busbars are connected by an insulating tube. The cooling medium is used to cool and dissipate heat from multiple busbars. At the same time, the insulating tube provides electrical isolation, reducing the risk of short circuits or breakdowns.
It effectively reduces the risk of thermal runaway in the battery pack, improves heat dissipation, reduces busbar area, and enhances battery pack space utilization and electrical safety.
Smart Images
Figure CN224520121U_ABST
Abstract
Claims
1. An electrical cell connection assembly, characterized by The cell connection assembly includes at least two busbars and at least one insulating tube; The busbar is used for electrical connection with the battery cell, and a heat exchange channel is formed inside the busbar, the heat exchange channel having a channel inlet and a channel outlet; The insulating tube is disposed between two adjacent busbars, one end of the insulating tube is connected to the flow outlet of one of the busbars, and the other end of the insulating tube is connected to the flow inlet of the other busbar.
2. The cell connection assembly of claim 1, wherein, The busbar includes two mating manifolds, one of which has a flow channel groove, the flow channel groove and the other of the two manifolds defining the heat exchange flow channel; or... The two manifolds are each provided with a flow channel groove, and the two flow channel grooves are arranged opposite to each other to define the heat exchange flow channel.
3. The cell connection assembly of claim 2, wherein, The two busbars are formed by stamping and connected by welding.
4. The cell connection assembly of claim 1, wherein, The busbar includes an integrally formed busbar body and a protrusion, the protrusion protruding from the busbar body in the thickness direction; wherein the heat exchange channel is formed inside the protrusion.
5. The cell connection assembly of any one of claims 1-4, wherein, The inner wall of the heat exchange channel is provided with an insulating layer.
6. The cell connection assembly of any one of claims 1-4, wherein, The busbar includes a connecting region and a non-connecting region. The connecting region is used for electrical connection with the battery cell, and the non-connecting region is arranged with the heat exchange channel.
7. The cell connection assembly of claim 1, wherein, The insulating tube includes an insulating tube body, a first insulating tube head, and a second insulating tube head; The first insulating tube head is connected to the first end of the insulating tube body, and the second insulating tube head is connected to the second end of the insulating tube body; The diameters of the first insulating tube head and the second insulating tube head are smaller than the diameter of the insulating tube body. The first insulating tube head is used to insert into and communicate with the flow outlet of one of the two adjacent busbars, and the second insulating tube head is used to insert into and communicate with the flow inlet of the other of the two adjacent busbars.
8. The cell connection assembly of claim 7, wherein, The insulating tube further includes a first sealing element, which is sleeved on the first insulating tube head to seal the flow channel outlet with the first insulating tube head; And / or, the insulating tube further includes a second sealing element, which is sleeved on the second insulating tube head to seal the flow channel inlet to the second insulating tube head.
9. The cell connection assembly of claim 1, wherein, The at least two busbars include at least two first busbar groups, the first busbar groups being spaced apart in a first direction, and the first busbar groups including at least two first busbars being spaced apart in a second direction; At least one of the insulating tubes comprises at least two intermediate insulating tubes and at least one bridging insulating tube; The intermediate insulating tube is used to connect two heat exchange channels in two adjacent first busbars in the same first busbar group; The bridging insulating tube is used to connect two heat exchange channels in two of the two first busbars in two adjacent first busbar groups.
10. The cell connection assembly of claim 9, wherein, The first bus includes an intermediate bus and an end bus; The intermediate busbar is used to electrically connect two adjacent battery cells; The end busbar includes a first busbar and a second busbar connected to each other. The first busbar is used to electrically connect to the end cell, and the second busbar is used to protrude from the end cell in the second direction.
11. The cell connection assembly of claim 10, wherein, The cell connection assembly also includes a jumper bus; One end of the bridging bus is electrically connected to the second bus section of the end bus of one of the first bus groups, and the other end of the bridging bus is electrically connected to the second bus section of the end bus of another first bus group.
12. The cell connection assembly of any one of claims 1-4, wherein, The insulating tube is constructed as a flexible tube.
13. A battery pack, characterized by, The battery pack includes a cell connection assembly according to any one of claims 1-12 and at least two cells, the cell connection assembly being disposed on the side of the cells where terminals are arranged.
14. The battery pack of claim 13, wherein, The battery pack also includes a heat exchange component, which is disposed on the side of the battery cell away from the terminal post; The battery pack also includes a liquid inlet main pipe, a first liquid inlet branch pipe and a second liquid inlet branch pipe, wherein the liquid inlet main pipe is used to supply the heat exchange medium to flow in. The first liquid inlet branch pipe is connected to the main liquid inlet pipe, and the first liquid inlet branch pipe is connected to the busbar of the cell connection assembly to transport the heat exchange medium; the second liquid inlet branch pipe is connected to the main liquid inlet pipe, and the second liquid inlet branch pipe is connected to the inlet of the heat exchange component to transport the heat exchange medium.
15. The battery pack of claim 14, wherein, The battery pack also includes a liquid outlet main pipe, a first liquid outlet branch pipe and a second liquid outlet branch pipe, wherein the liquid outlet main pipe is used to supply the heat exchange medium to flow out. The first liquid outlet branch pipe is connected to the busbar of the battery cell connection assembly to output the heat exchange medium, and the first liquid outlet branch pipe is connected to the liquid outlet main pipe; the second liquid outlet branch pipe is connected to the outlet of the heat exchange component to output the heat exchange medium, and the second liquid outlet branch pipe is connected to the liquid outlet main pipe.
16. A vehicle characterized by comprising: The vehicle includes the battery pack according to any one of claims 13-15.