CN217387276U

CN217387276U - Integrated water-cooled battery device

Info

Publication number: CN217387276U
Application number: CN202123003703.4U
Authority: CN
Inventors: 左永杰
Original assignee: Suzhou Zhengli New Energy Technology Co ltd
Current assignee: Suzhou Zhengli New Energy Technology Co ltd
Priority date: 2021-12-01
Filing date: 2021-12-01
Publication date: 2022-09-06
Anticipated expiration: 2031-12-01

Abstract

The utility model discloses an integrated water-cooled battery device, which comprises a water-cooled bin and a battery cell group, wherein the upper part of the water-cooled bin is provided with an opening, a water inlet and a water outlet are arranged on the bin body of the water-cooled bin, and the water-cooled bin is filled with cooling liquid through the water inlet and the water outlet; the battery cell group comprises a plurality of battery cells and a battery cell support fixed on the output end face of the battery cells, the battery cells are positioned in cooling liquid in the water cooling bin, and the battery cell support covers the opening of the water cooling bin and is fixedly connected with the end face of the opening of the water cooling bin. The utility model eliminates the water cooling plate, the heat conducting medium and the battery box body, and effectively improves the heat exchange efficiency and the temperature uniformity of the battery core; meanwhile, the number of parts is reduced, the product cost is greatly reduced, the space utilization rate is improved, the energy of a battery system can be increased in a limited space, and the endurance mileage of the vehicle is increased.

Description

Integrated water-cooled battery device

Technical Field

The utility model relates to a power battery field, concretely relates to integral type water-cooling battery device.

Background

With the popularization of new energy automobiles, in order to meet the pursuit of people on the cost performance of vehicles, each host factory has higher and higher requirements on the temperature control and the cost control of the vehicle battery;

in order to improve the temperature control of the battery pack and balance the cost, a water cooling plate is arranged and designed at the bottom or the top of a module or a battery cell in the battery pack, the bottom or the top of the battery module of the existing product, the bottom or the top of the battery cell contacts the water cooling plate through a heat conducting medium, the heat of the module or the battery cell is transferred to the water cooling plate, and the heat is taken away through the circulation of cooling liquid in the water cooling plate so as to achieve the purpose of cooling the module or the battery cell; similarly, the cooling liquid is heated to transfer heat to the water cooling plate, and the heat is transferred to the module or the battery cell through the heat-conducting medium to achieve the purpose of heating the battery pack; the heating or cooling mode is through the heat-conducting medium and the water-cooling plate material, the heating or cooling rate is slow, the temperature control effect is not ideal, and the energy consumption of the battery pack is increased; because only the bottom surface or the top surface of the module or the battery cell contacts the water cooling plate through the heat conducting medium, the uniformity of the temperature of each battery cell is poor in the process of cooling or heating, and the performance of the battery is influenced; and the number of parts is large, which is not beneficial to cost control.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an integral type water-cooled battery device can heat up or cool down electric core fast, has promoted the efficiency and has reduced weight and cost.

Realize the utility model discloses the technical scheme of purpose does: an integrated water-cooled battery device comprises a water-cooled bin and a battery cell group, wherein an opening is formed above the water-cooled bin, a water inlet and a water outlet are arranged on a bin body of the water-cooled bin, and the water-cooled bin is filled with cooling liquid through the water inlet and the water outlet; the battery cell group comprises a plurality of battery cells and a battery cell support fixed on the output end face of the battery cells, the battery cells are positioned in cooling liquid in the water cooling bin, and the battery cell support covers the opening of the water cooling bin and is fixedly connected with the end face of the opening of the water cooling bin.

Furthermore, be equipped with first utmost point ear, second utmost point ear, explosion-proof valve and screw hole on the output terminal surface of electric core, be equipped with first utmost point ear through-hole, second utmost point ear through-hole, explosion-proof valve through-hole and electric core fixed through-hole that correspond respectively with the position of first utmost point ear, second utmost point ear, explosion-proof valve and screw hole on the electric core support, electric core support and electric core pass through bolt fixed connection.

Furthermore, a sealing groove is formed in one circle of the output end face of the battery cell, and a sealing ring is arranged in the sealing groove.

Furthermore, the sealing ring is made of soft rubber.

Further, the clearance between the first lug through hole and the first lug and the clearance between the second lug through hole and the second lug are not less than 2.5 mm.

Furthermore, the number of the threaded holes is 2, the explosion-proof valve is installed at the central position of the output end face of the battery cell, the 2 threaded holes are respectively located at two sides of the explosion-proof valve, and the first pole lug and the second pole lug are respectively located at one side of the 2 threaded holes far away from the explosion-proof valve.

Furthermore, a plurality of electric cores are the electric core of different models, and the clearance is 0.1 ~ 5mm between the adjacent electric core.

Furthermore, the battery cell support and the water cooling bin are made of aluminum or iron materials.

Furthermore, the opening end face of the water cooling bin is fixed with an installation flange face, and the battery cell support is fixedly connected with the installation flange face through bolts, adhesive sealing rings or sealant.

Furthermore, the outer side of the water cooling bin is provided with a suspension point, and the height of the water cooling bin is greater than that of the battery core.

Compared with the prior art, the utility model, it is showing the effect and is: the water-cooled battery device cancels heat-conducting media, water-cooled panels and battery boxes, adopts a non-modular design, directly immerses the battery core into cooling liquid, directly heats or cools the battery core by heating or refrigerating circulating cooling liquid, can quickly realize the purpose of heating or cooling the battery core and improve the energy efficiency; the cooling liquid filled in the water-cooled battery is arranged on the surfaces of the periphery and the bottom of the battery cell, and the temperature uniformity is excellent; the utility model discloses owing to cancelled traditional water-cooling board, heat-conducting glue and module end plate and curb plate subassembly etc. also do benefit to cost control when reducing weight, improved space utilization simultaneously, can promote battery system's energy in finite space, increase the continuation of the journey mileage of vehicle.

Drawings

Fig. 1 is a schematic structural diagram of an integrated water-cooled battery device.

Fig. 2 is the structure diagram of the middle cell of the present invention.

Fig. 3 is the installation schematic diagram of the middle cell and the cell support of the present invention.

Fig. 4 is an overall schematic diagram of the integrated water-cooled battery device.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only some embodiments, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1, the integrated water-cooled battery device provided in this embodiment includes a battery cell support 1, a sealing ring 2, a plurality of battery cells 3 and a water-cooled bin 4, and adopts a non-modular design, the battery cells and the water-cooled bin are designed and combined into a whole directly, the water-cooled bin 4 is filled with a cooling liquid along with a cooling liquid circulation loop of a thermal management system, and the cooling liquid is directly attached to the outer surface of each battery cell 3;

as shown in fig. 2, a first tab 6, a second tab 7, an explosion-proof valve 10, a first threaded hole 4, a second threaded hole 5, a sealing ring 2 and a sealing groove 9 are arranged on an output end surface 8 of the battery cell 3; the explosion-proof valve 10 is arranged in the middle of the output end face 8, the first threaded hole 4 and the second threaded hole 5 are respectively positioned on two sides of the explosion-proof valve 10, the first lug 6 and the second lug 7 are a positive electrode and a negative electrode of the battery cell and are respectively positioned on two sides of the first threaded hole 4 and the second threaded hole 5, and no position distinction is made; a sealing groove 9 is formed in the periphery of the output end face 8, and the sealing ring 2 is installed in the sealing groove 9 of the battery core 3; the material system of the sealing ring 2 is soft rubber, and the battery cell 3 is provided with a shell by default in the field, so the description of the shell embodiment of the battery cell 3 is not repeated.

As shown in fig. 3, the cell holder 1 includes a first cell fixing through hole 15, a second cell fixing through hole 16, and a first tab through hole 11, a second tab through hole 13, and an explosion-proof valve through hole 12, which are used for fixedly mounting the cell 3, and through which the first tab 6, the second tab 7, and the explosion-proof valve 10 shown in fig. 2 pass, the openings of the first tab through hole 11 and the second tab through hole 13 are located right above the first tab 6 and the second tab 7 of the cell, and an electrical conductor of the first tab 6 or the second tab 7 of the cell in fig. 2 is required to ensure an electrical gap of at least 2.5 mm; the number and the positions of the first cell fixing through holes 15, the second cell fixing through holes 16 and the explosion-proof valve through holes 12 on the cell support 1 correspond to the number and the positions of the first threaded holes 4, the second threaded holes 5 and the explosion-proof valves 10 on the cell 3; the material system of the battery cell bracket 1 is aluminum or iron;

as shown in fig. 3, a cell group 19 is formed by 13 cells 3 and a cell fixing support 1, and is characterized in that a non-module end plate and a non-module side plate are adopted around the cell group 19; the electric cores 3 are installed through the second electric core fixing through holes 16 and the first electric core fixing through holes 15 on the electric core fixing support 1 one by one through bolts; the serial-parallel connection form of any electric core 3 and the adjacent electric core in the electric core group is not limited; a gap exists between any one of the battery cells A in the battery cell group and the adjacent battery cell, generally ranges from 0.1 mm to 5mm, and includes but is not limited to the interval; the battery pack 19 can also be formed by mixing a plurality of battery cells 3 with a plurality of other battery cell types, namely, a combination of 1 battery cell 3+12 battery cells which are different from the battery cells 3; the number of the electric cores 3 in the electric core group 19 is not limited to 13;

as shown in fig. 3, an installation flange surface 17 is arranged on the opening end surface of the water-cooling chamber 4, and a water inlet 14 and a water outlet 18 are arranged on the chamber body of the water-cooling chamber 4; the water cooling bin 4 is a cooling liquid bin and a battery core bin; the water inlet 14 and the water outlet 18 are connected with a cooling liquid circulating pipeline of a vehicle thermal management system into a whole; the flange surface 17 of the water cooling bin can be pasted with a sealing ring or coated with a sealing glue; the material system of the water cooling bin 4 is aluminum or iron; the water inlet function of the water inlet 14 and the water outlet function of the water outlet 18 can be interchanged, the water inlet 14 can also be used as a water outlet, the water outlet 18 can also be used as a water inlet, and the position of the water inlet can be any position on the water-cooling bin body;

as shown in fig. 3, the electric core group 19 is connected with the flange surface 17 of the water cooling chamber 4 by bolts, or can be encapsulated by structural adhesive to form an integrated water-cooled battery device 20 as shown in fig. 4;

as shown in fig. 4, the water inlet 14 and the water outlet 18 are used for connecting an external vehicle thermal management coolant circulation loop, and form a sealed space with the integrated water-cooled battery device 20; the water inlet and the water outlet can also be used for detecting the tightness of the tool for product off-line;

the integrated water-cooled battery device 20 can also be provided with suspension points at the periphery outside the water-cooled bin 4, and can be directly installed with a vehicle chassis as a single product to form a battery system; the battery system can also be formed by directly mounting a plurality of products with the same electric core number or different electric core numbers with a vehicle chassis;

the integrated water-cooled battery device 20 can also be used as a water-cooled series or parallel unit inside a battery pack box body to be matched with one or more other module units with the same electric core number or different electric core numbers to form a battery pack.

Compared with the traditional combination scheme of cooling liquid, water cooling plate, heat conducting medium, bottom surface or top surface of the battery cell and the battery box body, the utility model eliminates the water cooling plate, the heat conducting medium (heat conducting pad or heat conducting silicone grease) and the battery box body, and effectively improves the heat exchange efficiency and the temperature uniformity of the battery cell; the number of parts is reduced, and the product cost is greatly reduced; the space utilization rate is improved, the energy of the battery system can be improved in a limited space, and the driving mileage of the vehicle is increased.

Claims

1. The integrated water-cooled battery device is characterized by comprising a water-cooled bin (4) and a battery cell group (19), wherein an opening is formed in the upper part of the water-cooled bin (4), a water inlet and a water outlet are formed in a bin body of the water-cooled bin (4), and cooling liquid is filled in the water-cooled bin (4) through the water inlet and the water outlet; the battery core group (19) comprises a plurality of battery cores (3) and battery core supports (1) fixed on the output end faces (8) of the battery cores (3), the battery cores (3) are located in cooling liquid in the water cooling bin (4), and the battery core supports (1) are covered on the opening of the water cooling bin (4) and are fixedly connected with the opening end faces of the water cooling bin (4).

2. The integrated water-cooled battery device according to claim 1, wherein a first tab (6), a second tab (7), an explosion-proof valve (10) and a threaded hole are arranged on the output end surface (8) of the battery cell (3), a first tab through hole (11), a second tab through hole (13), an explosion-proof valve through hole (12) and a battery cell fixing through hole which correspond to the first tab (6), the second tab (7), the explosion-proof valve (10) and the threaded hole (5) respectively are arranged on the battery cell support (1), and the battery cell support (1) and the battery cell (3) are fixedly connected through bolts.

3. The integrated water-cooled battery device according to claim 2, characterized in that a sealing groove (9) is formed in the periphery of the output end face (8) of the battery core (3), and a sealing ring (2) is arranged in the sealing groove (9).

4. The integrated water-cooled battery device according to claim 3, wherein the sealing ring (2) is made of soft rubber.

5. The integrated water-cooled battery device according to claim 2, wherein gaps between the first tab through hole (11) and the first tab (6), and between the second tab through hole (13) and the second tab (7) are not less than 2.5 mm.

6. The integrated water-cooled battery device according to claim 2, wherein the number of the threaded holes is 2, the explosion-proof valve (10) is installed at the central position of the output end face (8) of the battery cell (3), the 2 threaded holes are respectively located at two sides of the explosion-proof valve (10), and the first tab (6) and the second tab (7) are respectively located at one side of the 2 threaded holes away from the explosion-proof valve (10).

7. The integrated water-cooled battery device according to claim 1, wherein the plurality of cells (3) are cells of different types, and the gap between adjacent cells (3) is 0.1-5 mm.

8. The integrated water-cooled battery device according to claim 1, wherein the battery core bracket (1) and the water-cooled bin (4) are made of aluminum or iron.

9. The integrated water-cooled battery device according to claim 1, wherein an installation flange surface (17) is fixed on the opening end surface of the water-cooled bin (4), and the cell support (1) is fixedly connected with the installation flange surface (17) through bolts, adhesive sealing rings or sealant.

10. The integrated water-cooled battery device according to any one of claims 1 to 9, wherein a suspension point is arranged on the outer side of the water-cooled bin (4), and the height of the water-cooled bin (4) is greater than that of the battery cell (3).