Cell contacting system comprising heat-conductive adhesive, battery module structure and battery
Disclosed are a cell contacting system (CCS), a battery module structure and a battery. The CCS is arranged at the tops of multiple cells, and a gap is formed between each two adjacent cells. The CCS includes a fixing frame and a bus bar. The fixing frame is arranged at the tops of the multiple cells, and is provided with multiple positioning protrusions. Each positioning protrusion can extend into a gap between corresponding adjacent cells and makes contact with side faces of the corresponding cells. The fixing frame is provided with installation holes. The bus bar is embedded in the installation holes, makes contact with and electrically connects the multiple cells. The CCS further includes a heat-conductive adhesive, and the heat-conductive adhesive is arranged on end faces of the fixing frame and the bus bar.
1 . A cell contacting system (CCS), arranged at tops of a plurality of cells, wherein a gap is formed between each two adjacent cells of the plurality of cells, and the CCS comprises:
a fixing frame, arranged at the tops of the plurality of cells, and provided with a plurality of positioning protrusions, wherein each of the plurality of positioning protrusions extends into a gap between corresponding adjacent cells and makes contact with side faces of the corresponding adjacent cells, and the fixing frame is also provided with a plurality of installation holes; and
a bus bar, embedded in the plurality of installation holes, wherein the bus bar makes contact with the plurality of cells and electrically connects the plurality of cells;
wherein the cell contacting system further comprises a heat-conductive adhesive, wherein the heat-conductive adhesive is arranged on end faces of the fixing frame and the bus bar, and can bond the fixing frame and the bus bar.
2 . The CCS according to claim 1 , wherein the bus bar is provided with a plurality of positioning holes, the fixing frame is provided with a plurality of positioning columns, and each of the plurality of positioning columns passes through a corresponding positioning hole.
3 . The CCS according to claim 1 , wherein the fixing frame is provided with a plurality of installation grooves, the bus bar is arranged in the plurality of installation grooves, each of the plurality of installation holes is formed in a bottom face of a corresponding installation groove, a side edge of the bus bar, the bottom face of each of the plurality of installation grooves, and a side wall of each of the plurality of installation grooves define an adhesive storage groove, and the adhesive storage groove can accommodate the heat-conductive adhesive.
4 . The CCS according to claim 1 , wherein the fixing frame is provided with a plurality of adhesive passing holes, the plurality of adhesive passing holes are located at top ends of the plurality of cells, and the heat-conductive adhesive can fill the plurality of adhesive passing holes and makes contact with the top ends of the plurality of cells.
5 . The CCS according to claim 1 , wherein the bus bar comprises a plurality of positive electrode connecting parts and a plurality of negative electrode connecting parts, each of the plurality of installation holes comprises a positive electrode installation hole and a negative electrode installation hole, each of the plurality of positive electrode connecting parts passes through a corresponding positive electrode installation hole and is electrically connected with a positive electrode of a corresponding cell of the plurality of cells, and each of the plurality of negative electrode connecting parts passes through a corresponding negative electrode installation hole and is electrically connected with a negative electrode of a corresponding cell of the plurality of cells.
6 . A battery module structure, comprising the cell contacting system (CCS) according to claim 1 , and further comprising a bracket and a plurality of cells, wherein a bottom face of the bracket is provided with a plurality of placing parts, a positioning part is arranged along a periphery of each of the plurality of placing parts, each of the plurality of placing parts and a corresponding positioning part define an accommodating groove, a bottom of each of the plurality of cells is placed in a corresponding accommodating groove, and the plurality of cells and the bracket are fixedly connected by structural adhesive.
7 . The CCS according to claim 3 , wherein the fixing frame is provided with a plurality of adhesive passing holes, the plurality of adhesive passing holes are located at top ends of the plurality of cells, and the heat-conductive adhesive can fill the plurality of adhesive passing holes and makes contact with the top ends of the plurality of cells.
8 . The CCS according to claim 2 , wherein the bus bar comprises a plurality of positive electrode connecting parts and a plurality of negative electrode connecting parts, each of the plurality of installation holes comprises a positive electrode installation hole and a negative electrode installation hole, each of the plurality of positive electrode connecting parts passes through a corresponding positive electrode installation hole and is electrically connected with a positive electrode of a corresponding cell of the plurality of cells, and each of the plurality of negative electrode connecting parts passes through a corresponding negative electrode installation hole and is electrically connected with a negative electrode of a corresponding cell of the plurality of cells.
9 . The CCS according to claim 3 , wherein the bus bar comprises a plurality of positive electrode connecting parts and a plurality of negative electrode connecting parts, each of the plurality of installation hole holes comprises a positive electrode installation hole and a negative electrode installation hole, each of the plurality of positive electrode connecting parts passes through a corresponding positive electrode installation hole and is electrically connected with a positive electrode of a corresponding cell of the plurality of cells, and each of the plurality of negative electrode connecting parts passes through a corresponding negative electrode installation hole and is electrically connected with a negative electrode of a corresponding cell of the plurality of cells.
10 . The battery module structure according to claim 6 , wherein the positioning part comprises a plurality of positioning blocks which are arranged at intervals.
11 . The battery module structure according to claim 10 , wherein each of the plurality of positioning blocks is arranged at a joint between adjacent placing parts.
12 . The battery module structure according to claim 10 , wherein a side face of each of the plurality of positioning blocks is provided with a groove.
13 . The battery module structure according to claim 10 , wherein for each of the plurality of positioning blocks, a thickness of a top is smaller than a thickness of a bottom.
14 . The battery module structure according to claim 6 , further comprising a tray, wherein the bracket is arranged on the tray, the tray is provided with a plurality of pressure relief holes, each of the plurality of placing parts is provided with a through hole, and each of the plurality of pressure relief holes communicates with a corresponding through hole.
15 . The battery module structure according to claim 14 , wherein the bracket is provided with a plurality of adhesive overflow holes, an adhesive injection space is formed between the bracket and the tray, and the structural adhesive can flow to the adhesive injection space through the gap between each two adjacent cells of the plurality of cells and the plurality of adhesive overflow holes.
16 . The battery module structure according to claim 14 , wherein an edge of each through hole is provided with a ring rib which forms a communication channel between each of the plurality of pressure relief holes and the corresponding through hole, and the ring rib makes contact with the tray.
17 . The battery module structure according to claim 16 , wherein each of the plurality of placing parts is provided with a raised edge, the raised edge faces the tray, and the raised edge is configured to increase contact area between the structural adhesive and the bracket.
18 . A battery, comprising a box, and the battery module structure according to claim 6 , wherein the battery module structure is arranged inside the box.