Soft package battery cell support and electric connection buckle thereof

Abstract

The utility model relates to the field of lithium batteries, and discloses a soft package battery cell bracket and an electric connection buckle thereof. The soft package battery cell support comprises supports and liquid cooling plates, the liquid cooling plates are located in the middles of the inner sides of the supports, battery cells are placed between the liquid cooling plates in the middles of the adjacent supports, and the large faces of the battery cells make contact with the liquid cooling plates for heat dissipation. The supports and the water inlets and outlets of the liquid cooling plate are integrally formed through injection molding, the water inlets and outlets of the supports are of buckle type sealing structures, and the water inlets and outlets of the adjacent supports are sequentially connected in series to form water circulation. The electric connection buckle comprises a plastic shell and a built-in conductive device, and the conductive device and the conductive block of the support are connected in series and in parallel in a clamping mode to achieve series connection and parallel connection of the whole bag. The liquid cooling plate is arranged in the support, the structural strength of the support is improved through the manufacturing technology of embedding and injection integrated forming, meanwhile, heat dissipation can be conducted on the battery cells, the adjacent battery cells are separated through the support, and the electrical insulation performance of the whole pack is effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of lithium battery, especially to a soft package battery cell support and its electric connection buckle. BACKGROUND

[0002] With the popular use of lithium ion batteries, soft package batteries are favored by users for their small size, light weight and high energy density; but because their shells are made of aluminum plastic film material, they have poor rigidity and unstable structural performance, and there are problems such as liquid leakage during the bending and welding processes in the process of stacking the cell tabs, which leads to the whole package being scrapped and invalid, and after the cell stack is grouped, the high-rate discharge of the module causes the cell to heat up, which easily causes the whole package to be out of control and other safety hazards; when a single cell has abnormal 0 pressure, the traditional battery series and parallel connection process will cause the whole package to be scrapped, increasing the user's use cost. UTILITY MODEL CONTENTS

[0003] The utility model aims to provide a soft package lithium battery group support, which can make the module have strong structural strength, and the support is designed with detachable electric connection buckles, so that when local cells are abnormal, the electric connection buckles can be detached to replace the single cells directly, avoiding the whole package being scrapped and reducing the user's use cost.

[0004] The technical scheme of the utility model is:

[0005] A soft package battery cell support, comprising a support and a liquid cooling plate, the liquid cooling plate is located at the middle position of the inner side of the support, the liquid cooling plates between the adjacent supports are placed with cells, and the large surface of the cell is in contact with the liquid cooling plate for heat dissipation.

[0006] Preferably, the support and the water inlet and outlet of the liquid cooling plate are integrally injection molded, the water inlet and outlet of the support adopts a buckle type sealing structure, the water inlets and outlets of the adjacent supports are sequentially connected in series to form a water circulation.

[0007] Preferably, the bottom of the support is provided with a cell dismounting port, and the dismounting port is configured to allow the directional disassembly of the single cell.

[0008] Preferably, the support is internally integrated with a conductive block, the conductive block is integrally formed with the support by injection molding and is arranged at a cell tab welding position.

[0009] Preferably, the support forms a hui-shaped protective structure inside, the hui-shaped protective structure surrounds the cell and provides limiting protection.

[0010] Preferably, it further comprises an electric connection buckle, the electric connection buckle comprises a plastic shell and an embedded conductive device, and the conductive device and the conductive block of the support realize the series and parallel connection of the whole package through clamping.

[0011] Preferably, the electric connection buckle is a single buckle or a plurality of buckles; the bracket is internally provided with conductive foam, and the electric connection buckle and the bracket are electrically connected by compressing the conductive foam.

[0012] Preferably, the electric connection buckle is internally provided with a fuse device, which is triggered to cut off the circuit when overcurrent occurs in the whole package.

[0013] Preferably, the electric connection buckle is a detachable buckle.

[0014] The utility model discloses the advantages are:

[0015] 1. The utility model provides a soft -walled battery cell bracket bracket, be internally provided with liquid cooling plate of this bracket, bury the integrated manufacturing process of injection and improve the structural strength of bracket, can heat dissipation to battery cell simultaneously, and there is the bracket between adjacent battery cell and is cut off, effectively improved the electrical insulation of whole package.

[0016] 2, the left and right bracket of the utility model adopts the mode of jointing and is connected, and the connecting port is the water inlet and outlet of cold plate, has the mistake proofing function, ensures that the left and right bracket is connected and has water -cooling circulation function simultaneously, improves whole package thermal stability;

[0017] 3, the bracket of the utility model is designed with the fixed groove of battery cell tab in the right side, avoids the battery cell tab in the production process to be dragged by external force and leads to the battery cell leakage problem, improves the safety performance of whole package, and the inside of bracket has the adapter block, adopts the manufacturing process of burying injection, realizes that the battery cell tab can be welded without bending, simplifies the manufacturing process of module production, and reduces production cost. BRIEF DESCRIPTION OF DRAWINGS

[0018] The utility model will be further described in connection with the drawings and examples:

[0019] Figure 1 It is the structure schematic drawing of soft -walled battery cell bracket of the utility model;

[0020] Figure 2 It is the front side schematic drawing of bracket A;

[0021] Figure 3 It is the rear side schematic drawing of bracket A;

[0022] Figure 4 It is the front side schematic drawing of bracket B;

[0023] Figure 5 It is the rear side schematic drawing of bracket B;

[0024] Figure 6 It is the water circulation schematic drawing in soft -walled battery cell bracket;

[0025] Figure 7The schematic view of the buckle seal design for the water inlet and outlet of the support;

[0026] Figure 8 The schematic view of the conductive block design;

[0027] Figure 9 The schematic view of the conductive block design from another perspective;

[0028] Figure 10 The schematic view of the electric connection buckle;

[0029] Figure 11 The schematic view of the support connected by multiple rows of electric connection buckles;

[0030] Figure 12 The internal schematic view of the electric connection buckle;

[0031] Figure 13 The cross-sectional view of the electric connection buckle;

[0032] Figure 14 The cross-sectional view of the support connected by the electric connection buckle. DETAILED DESCRIPTION

[0033] As Figure 1 shown, the soft package battery cell support includes a support 1 and a liquid cooling plate 2. The liquid cooling plate 2 is located at the middle position of the inner side of the support 1. The battery cell 4 is placed between the liquid cooling plates 2 in the adjacent supports 1. The large surface of the battery cell is in contact with the liquid cooling plate for heat dissipation. The composite mode improves the overall structural strength of the support. Meanwhile, the large surface of the battery cell can be cooled. The contact area is large, the cooling speed is fast, and the risk of thermal runaway of the whole package during high-rate discharge is avoided.

[0034] The adjacent supports are respectively denoted as support A and support B. As Figures 2-5 shown, the front and rear side schematic views of the support A and the support B are respectively shown. The left upper corner of the front side of the support A is provided with a water inlet 11. The right lower corner of the rear side of the support A is provided with a water outlet 12. The left lower corner of the front side of the support B is provided with a water inlet 11. The right upper corner of the rear side of the support B is provided with a water outlet 12. The water outlet 12 of the support A is connected with the water inlet 11 of the support B. The water inlets and outlets of the multiple supports are sequentially connected, forming a water circulation, as Figure 6 shown.

[0035] As Figure 7As shown, the bracket is integrally injection molded with the inlet and outlet of the liquid cooling plate, the inlet and outlet of the bracket adopt a buckle type sealing structure, the buckle type sealing structure comprises a buckle 13 and a sealing ring 14, the sealing ring 14 is sleeved on the joint of the inlet and outlet of the liquid cooling plate, and the buckle 13 is fixed to the interface and the sealing ring 14. The water circulation connection provides reliable connection for the left and right brackets, improves the overall package thermal stability, and at the same time, the bottom is designed with a dismounting opening, and the dismounting opening is configured to allow directional disassembly of the single battery cell. When the single battery cell fails, it can be disassembled and replaced through the dismounting opening, avoiding the risk of overall package scrapping and reducing the user's use cost.

[0036] As shown in Figure 8 , 9 As shown, the bracket is integrally injection molded with the inlet and outlet of the liquid cooling plate, the inlet and outlet of the bracket adopt a buckle type sealing structure, the buckle type sealing structure comprises a buckle 13 and a sealing ring 14, the sealing ring 14 is sleeved on the joint of the inlet and outlet of the liquid cooling plate, and the buckle 13 is fixed to the interface and the sealing ring 14. The water circulation connection provides reliable connection for the left and right brackets, improves the overall package thermal stability, and at the same time, the bottom is designed with a dismounting opening, and the dismounting opening is configured to allow directional disassembly of the single battery cell. When the single battery cell fails, it can be disassembled and replaced through the dismounting opening, avoiding the risk of overall package scrapping and reducing the user's use cost.

[0037] As shown in Figure 10 The utility model provides a kind of electric connection buckle 3, buckle shell is plastic shell 31, and inside it is designed with electrically conductive device 32, the bracket can be designed as single buckle and also can be designed as multiple buckle, and the parallel connection of whole package is realized by the way of clamping with bracket electrically conductive block part, as shown in Figure 11 .

[0038] As shown in Figure 12 The electric connection buckle is equipped with a fuse device 33 inside, when the whole package appears overcurrent, triggers fuse device 33, and cuts off the loop. Avoid the safety accident of whole package due to excessive current, improve the safety of whole package.

[0039] As shown in Figure 13 , 14 The bracket is designed with electrically conductive foam 34 inside, and electric connection buckle 3 and bracket 1 are connected by compressing electrically conductive foam 34 to realize circuit conduction with electrically conductive block 15. The problem of electric connection failure of whole package under vibration condition is avoided by interference fit, and the safety of whole package is improved. At the same time, the buckle is detachable, and the single battery cell can be disassembled without trace when it is abnormal, avoiding the problem of whole package scrapping due to single battery cell abnormality, and reducing the use cost of user.

[0040] The above examples are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and to implement it, and cannot limit the protection scope of the present application. Any modification made according to the spirit and essence of the main technical scheme of the present application should be covered within the protection scope of the present application.

Claims

1. A soft pack battery cell holder, characterized by, The application relates to a battery pack, which comprises a bracket and liquid cooling plates, the liquid cooling plates are arranged at the middle positions inside the bracket, the battery cells are arranged between the liquid cooling plates in the middle positions of adjacent brackets, and the large faces of the battery cells are in contact with the liquid cooling plates for heat dissipation.

2. The soft-pack battery cell holder of claim 1, wherein, The inlet and outlet of the bracket and the liquid cooling plate are integrally injection molded, the inlet and outlet of the bracket adopt a buckle type sealing structure, the inlets and outlets of adjacent brackets are sequentially connected in series to form a water circulation.

3. The soft-pack battery cell holder of claim 2, wherein, The bottom of the bracket is provided with a battery cell dismounting opening, and the dismounting opening is configured to allow directional dismounting of the single battery cell.

4. The soft-pack battery cell holder of claim 2, wherein, The bracket is internally integrated with an electrically-conductive block which is integrally injection molded with the bracket and arranged at a battery cell tab welding position.

5. The soft-pack battery cell holder of claim 4, wherein, The bracket internally forms a U-shaped protection structure which is arranged around the battery cell and provides limiting protection.

6. The soft-pack battery cell holder of claim 4, wherein, The application further relates to an electric connection buckle which comprises a plastic shell and an internally-arranged electrically-conductive device, the electrically-conductive device and the electrically-conductive block of the bracket are connected in series or in parallel through buckling.

7. The jelly-roll holder of claim 6, wherein, The electric connection buckle is a single buckle or a plurality of buckles, the bracket is internally designed with electrically-conductive foam, and the electric connection buckle and the bracket are connected in circuit through compressed electrically-conductive foam.

8. The jelly-roll holder of claim 7, wherein, The electric connection buckle is internally provided with a fuse device, when overcurrent occurs in the whole package, the fuse device is triggered to cut off the circuit.

9. The jelly-roll holder of claim 8, wherein, The electric connection buckle is a detachable buckle.

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