Soft package battery cell CTP module

Abstract

The utility model discloses a soft package battery cell CTP module, which belongs to the technical field of lithium ion batteries, and comprises a module box body, a battery cell module is arranged in the module box body, the battery cell module is composed of single battery cells, the soft package battery cell CTP module further comprises tabs, and the tabs are arranged at the two ends of the single battery cells; the L-shaped bus bars are arranged on the two sides of the electrode lug, and the L-shaped bus bars are connected with the electrode lug in a welding mode; the concentric-square-shaped busbar is arranged on one side of the L-shaped busbar, and the top end of the concentric-square-shaped busbar is connected with the top end of the L-shaped busbar; by arranging the L-shaped busbars to fix the tabs and then connecting the L-shaped busbars with the concentric-square-shaped busbars, the tabs of the soft package battery cell can be effectively fixed, the phenomena that the tabs fall off the busbars and the tabs are subjected to pseudo soldering are not prone to occurring, meanwhile, voltage collection is simple, and practicability is high.

Description

Technical Field

[0001] The utility model relates to the field of lithium-ion batteries, in particular to a soft-pack battery cell CTP module. Background Art

[0002] Traditional power battery cells must first be assembled into modules and then installed in the battery case. This solution has mature structure and process, making it easy to implement. However, further breakthroughs in energy density improvement and cost reduction are difficult to achieve. As customers demand increasingly higher battery energy density, CTP solutions are becoming a new trend in batteries.

[0003] It is difficult to assemble existing soft-pack battery cells into large modules. The tabs of the soft-pack battery cells cannot be effectively fixed, which makes it easy for the tabs to fall off and for the busbar and tabs to be poorly soldered. At the same time, it makes voltage collection difficult and has poor practicality.

[0004] To this end, we propose a soft-pack battery cell CTP module to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to solve the shortcomings of the prior art and to propose a soft-pack battery CTP module.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A soft-pack battery cell CTP module includes a module box, wherein a battery cell module is provided inside the module box, and the battery cell module is composed of a single battery cell, and further includes:

[0008] Tabs, which are provided at both ends of the single cell;

[0009] L-shaped busbars, the L-shaped busbars are provided on both sides of the tabs, and the L-shaped busbars are connected to the tabs by welding;

[0010] A meandering bus is provided on one side of the L-shaped bus, and a top end of the meandering bus is connected to a top end of the L-shaped bus.

[0011] Further preferably, an upper cover is provided on the top of the module box, and the battery cell module is located between the module box and the upper cover.

[0012] Further preferably, a liquid cooling plate is provided on one side of the battery cell module, a fixed end plate is provided on one side of the liquid cooling plate, and the liquid cooling plate and the fixed end plate are located in the module box.

[0013] Further preferably, collecting plates are provided on both sides of the top of the battery cell module, and a protruding end is provided at one end of the collecting plate, and the protruding end is connected to the top of the meandering bus bar.

[0014] Further preferably, foam is provided between the single battery cells, and the foam is fixed to the single battery cells by means of glue.

[0015] Further preferably, the battery cell module is provided with a plastic fixing plate on one side of the tab, and the plastic fixing plate comprises a fixing block, a first fixing groove and a second fixing groove.

[0016] Further preferably, the L-shaped busbar is arranged in the first fixing groove, and the meandering busbar is arranged in the second fixing groove.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] By setting an L-shaped bus to fix the tabs, and then connecting the L-shaped bus and the round bus, the tabs of the soft-pack battery cell can be effectively fixed, and it is unlikely that the tabs will fall off the bus or the tabs will have cold solder joints. At the same time, voltage collection is simple and practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is an exploded structural diagram of a soft-pack battery CTP module proposed in this utility model;

[0020] Figure 2 for Figure 1 Explosion structure diagram of the CEC core module;

[0021] Figure 3 for Figure 2 Explosion structure diagram of a single cell;

[0022] Figure 4 for Figure 2 A schematic diagram of the structure at center A;

[0023] Figure 5 for Figure 2 A magnified schematic diagram of the structure at point B in the middle.

[0024] In the figure: 1. Module box; 2. Upper cover; 3. Battery module; 301. Single battery cell; 3011. Tab; 302. Collection board; 3021. Protruding end; 303. Foam; 304. L-shaped busbar; 305. Circular busbar; 306. Plastic fixing plate; 3061. Fixing block; 3062. First fixing slot; 3063. Second fixing slot; 4. Liquid cooling plate; 5. Fixed end plate. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0026] Reference Figure 1 A soft-pack battery CTP module includes a module box 1, a battery module 3 is provided inside the module box 1, the module box 1 and the battery module 3 are connected and fixed by adhesive heat-conducting structural adhesive, the battery module 3 is composed of a single battery cell 301, and the single battery cell 301 has multiple single batteries. At the same time, the single battery cell 301 is a soft-pack battery cell.

[0027] refer to Figure 3 The tabs 3011 are provided at both ends of the single battery cell 301, and the tabs 3011 are connected to the single battery cell 301 by welding. The L-shaped bus 304 is provided on both sides of the tabs 3011, and the L-shaped bus 304 is connected to the tabs 3011 by welding; the meandering bus 305 is provided on one side of the L-shaped bus 304, and the top of the meandering bus 305 is connected to the top of the L-shaped bus 304. The top of the L-shaped bus 304 and the meandering bus 305 are fixedly connected by laser welding.

[0028] refer to Figure 3 and Figure 4 By setting an L-shaped bus 304 to fix the tab 3011, and then connecting the L-shaped bus 304 and the round bus 305, the tab 3011 of the soft-pack battery cell can be effectively fixed, and it is not easy for the tab 3011 to fall off the bus or the tab 3011 to have a cold solder joint. At the same time, voltage collection is simple and practical.

[0029] refer to Figure 1 A top cover 2 is provided on the top of the module box 1, and the battery cell module 3 is located between the module box 1 and the top cover 2. The top cover 2 and the module box 1 are fixed by bolts or welding, preferably by bolts, to facilitate subsequent removal of the top cover 2 for maintenance of the battery cell module 3 in the module box 1.

[0030] refer to Figure 1 A liquid cooling plate 4 is provided on one side of the battery cell module 3. The liquid cooling plate 4 can effectively dissipate heat for the battery cell module 3 and prevent the battery cell module 3 from being overheated and causing thermal runaway. A fixed end plate 5 is provided on one side of the liquid cooling plate 4. The liquid cooling plate 4 and the fixed end plate 5 are located in the module box 1. The fixed end plate 5 can provide a pre-tightening force to the liquid cooling plate 4 on one side, which can effectively limit the liquid cooling plate 4 and effectively fix the battery cell module 3.

[0031] refer to Figure 2 and Figure 4 Collection boards 302 are provided on both sides of the top of the battery cell module 3. The collection boards 302 can collect voltage information of the battery cell module 3. A protruding end 3021 is provided at one end of the collection board 302. The protruding end 3021 is connected to the top of the circular bus 305, so that the electrical connection of multiple single battery cells 301 on the battery cell module 3 can be achieved through the protruding end 3021.

[0032] refer to Figure 3 A foam 303 is provided between the single battery cells 301. The foam 303 can play a role in heat insulation between the single battery cells 301, isolate heat and prevent thermal runaway of the battery cell module 3. At the same time, it can keep the battery cell module 3 warm under low temperature conditions, which can effectively improve the energy density. The foam 303 is fixed to the single battery cell 301 by gluing, and is gluing with thermal conductive structural adhesive, which can effectively conduct heat.

[0033] refer to Figure 5 The battery module 3 is provided with a plastic fixing plate 306 on one side of the tab 3011. The plastic fixing plate 306 includes a fixing block 3061, a first fixing groove 3062 and a second fixing groove 3062. The L-shaped bus 304 is arranged in the first fixing groove 3062, and the round bus 305 is arranged in the second fixing groove 3062. The plastic fixing plate 306 can increase the pre-tightening force of multiple single battery cells 301, making the battery module 3 more stable. The first fixing groove 3062 can limit and fix the L-shaped bus 304, and the second fixing groove 3062 can limit and fix the round bus 305.

Claims

1. A soft-pack battery CTP module, comprising a module box, wherein a battery module is arranged inside the module box, and the battery module is composed of a single battery cell, characterized in that: Also includes: Tabs, which are provided at both ends of the single cell; L-shaped busbars, the L-shaped busbars are provided on both sides of the tabs, and the L-shaped busbars are connected to the tabs by welding; A meandering bus is provided on one side of the L-shaped bus, and a top end of the meandering bus is connected to a top end of the L-shaped bus.

2. The soft-pack battery CTP module according to claim 1, characterized in that: An upper cover is provided on the top of the module box, and the battery cell module is located between the module box and the upper cover.

3. The soft-pack battery CTP module according to claim 1, characterized in that: A liquid cooling plate is provided on one side of the battery cell module, and a fixed end plate is provided on one side of the liquid cooling plate. The liquid cooling plate and the fixed end plate are located in the module box.

4. The soft-pack battery CTP module according to claim 1, characterized in that: Collection plates are provided on both sides of the top of the battery core module. A protruding end is provided at one end of the collection plate, and the protruding end is connected to the top of the meandering bus bar.

5. The soft-pack battery CTP module according to claim 1, characterized in that: Foam is provided between the single battery cells, and the foam is fixed to the single battery cells by means of glue.

6. The soft-pack battery CTP module according to claim 1, characterized in that: The battery module is provided with a plastic fixing plate on one side of the tab, and the plastic fixing plate includes a fixing block, a first fixing groove and a second fixing groove.

7. The soft-pack battery CTP module according to claim 6, characterized in that: The L-shaped busbar is arranged in the first fixing groove, and the meandering busbar is arranged in the second fixing groove.

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