CN217405587U

CN217405587U - Multimode cooling integration power lithium cell group

Info

Publication number: CN217405587U
Application number: CN202121034070.0U
Authority: CN
Inventors: 严学庆; 刘瑜; 钱军
Original assignee: JIANGSU OLITER ENERGY TECHNOLOGY CO LTD
Current assignee: JIANGSU OLITER ENERGY TECHNOLOGY CO LTD
Priority date: 2021-05-14
Filing date: 2021-05-14
Publication date: 2022-09-09
Anticipated expiration: 2031-05-14

Abstract

The utility model discloses a multimode cooling integration power lithium cell group, including battery box and a plurality of lithium cell of setting in the battery box, inlet manifold and liquid outlet manifold are worn to be equipped with by lithium cell's top level, press from both sides between two adjacent lithium cell and be equipped with the liquid cooling device, and a plurality of liquid cooling devices form the liquid cooling passageway with inlet manifold and liquid outlet manifold intercommunication respectively, and the bottom of battery box is equipped with the air heat dissipation passageway. Compared with the prior art, the multi-mode cooling integrated power lithium battery pack provided by the utility model is not only heat-insulating and waterproof, but also adopts a liquid cooling and air cooling combined mode to take away heat generated by discharging of the battery pack, thereby completing the adjustment of the working temperature of the lithium battery unit and improving the use safety; the lithium battery unit improves the contribution rate of lithium ions to the conductivity and the migration rate of the lithium ions in the electrolyte and an SEI film, improves the cycle performance and high-rate charge and discharge performance of the battery, and improves the capacity and power of the lithium ion battery.

Description

Multimode cooling integration power lithium cell group

Technical Field

The invention relates to the technical field of electric automobiles, in particular to a multi-mode cooling integrated power lithium battery pack.

Background

With the improvement of the requirement of people on environmental protection, the research and application of new energy vehicles are more and more emphasized, and the lithium ion power vehicle is one of the representatives of the new energy vehicles. The key technology of the lithium ion power automobile is a lithium ion battery, and many factors need to be considered in the design of the lithium ion power automobile, so that the performance of the battery can meet the requirements of the automobile, and the battery can have sufficient safety and reliability. The working temperature range of the power lithium battery has strict requirements, such as charge is not allowed in low-temperature environment in winter, and the available capacity is greatly reduced during discharge; the lithium cell during operation produces certain heat, and in summer, its actual operating temperature is higher than ambient temperature, can produce unsafe factor and still can reduce battery life, consequently need take heat preservation or cooling measure to guarantee its normal work.

The defects of the prior art are as follows: at present, a single battery cannot meet the power requirement of an electric automobile, a plurality of batteries are often required to form a high-capacity and high-voltage battery pack for providing, the installation space of the battery pack is very limited and must be intensively arranged, and meanwhile, the heat energy management of the battery pack is divided into two aspects, so that on one hand, the battery short-time heavy current discharge is avoided for the electric control management of the battery pack to avoid the instantaneous heat increase of the battery, and on the other hand, the design of a battery pack frame is beneficial to the temperature equalization and heat dissipation of the battery; the current nonaqueous electrolyte used as a key material of a lithium battery cannot meet the requirements of high ionic conductivity, high conductivity, wide electrochemical window, high thermal stability, high chemical stability and the like.

Disclosure of Invention

In order to solve the technical problems, the invention provides a multimode cooling integrated power lithium battery pack, which is used for maintaining the temperature of a vehicle-mounted lithium battery within a certain range in a working environment, meeting the application requirements of a locomotive, normally exerting the performance of the vehicle-mounted lithium battery pack and having the structural advantages of small occupied space and low energy consumption; and effectively improve the migration rate of lithium ions in the lithium battery at the interface of the electrolyte and the electrode, thereby improving the multiplying power charge-discharge performance of the battery, widening the working temperature range of the battery and improving the safety of the battery under high power density.

The technical scheme adopted by the invention is as follows: the utility model provides a multimode cooling integration power lithium cell group, includes battery box and a plurality of lithium cell unit of vertical setting in this battery box, the key lies in: the lithium battery units are arranged in parallel, a liquid inlet main pipe and a liquid outlet main pipe are horizontally arranged above the lithium battery units in a penetrating mode, the lithium battery units are distributed along the length direction of the liquid inlet main pipe and the liquid outlet main pipe, a liquid cooling device is clamped between every two adjacent lithium battery units, the liquid cooling devices are respectively communicated with the liquid inlet main pipe and the liquid outlet main pipe to form a liquid cooling channel, and an air heat dissipation channel is arranged at the bottom of the battery box body;

the liquid cooling device comprises a vertically placed liquid cooling box, a vertical partition plate is arranged in the liquid cooling box and divides the liquid cooling box into a left temperature adjusting part and a right temperature adjusting part, a liquid inlet pipe is arranged in the left temperature adjusting part, a liquid inlet of the liquid inlet pipe is communicated with a liquid inlet main pipe, a liquid outlet pipe is arranged in the right temperature adjusting part, a liquid outlet of the liquid outlet pipe is communicated with a liquid outlet main pipe, a liquid guide hole is formed in the upper part of the vertical partition plate, and a liquid cooling channel is formed among the liquid inlet main pipe, the liquid inlet pipe, the liquid guide hole, the liquid outlet pipe and the liquid outlet main pipe;

preferably, the feed liquor pipe with the drain pipe is close to respectively the tank wall setting of battery box, the feed liquor pipe with the upper end of drain pipe all stretches out behind the liquid cooling box respectively with feed liquor house steward and play liquid house steward intercommunication, the lower extreme of feed liquor pipe and drain pipe respectively with the inner wall fixed connection of liquid cooling device, the feed liquor pipe with drain hole and feed liquor hole have been seted up on the pipe wall of drain pipe respectively, the feed liquor pipe with liquid circulation opposite direction in the drain pipe.

Preferably, be equipped with latticed water pipe and a plurality of column reposition of redundant personnel post on the side about vertical baffle respectively, latticed water pipe is located the left side portion that adjusts the temperature, it is located to go out the liquid hole the lower part of feed liquor pipe, the water inlet of latticed water pipe is close to it sets up to go out the liquid hole, the delivery port of latticed water pipe is close to it sets up, and is a plurality of to lead the liquid hole the column reposition of redundant personnel post dot matrix distribution is in the right side portion that adjusts the temperature, the feed liquor hole is from last evenly distributed down on the feed liquor pipe.

Preferably, the bottom of the battery box body is provided with mounting grooves corresponding to the lithium battery units one by one, any two side surfaces of the liquid cooling box are respectively and tightly attached to the outer walls of the adjacent lithium battery units, the other two side surfaces of the liquid cooling box are respectively and vertically connected with T-shaped convex strips, and the box wall of the battery box body is vertically provided with T-shaped grooves matched with the T-shaped convex strips.

Preferably, a bar-shaped through hole is horizontally formed in the bottom of the battery box body and is located below the mounting groove, a plurality of air holes are formed in the mounting groove, and the air holes are communicated with the bar-shaped through hole to form the air heat dissipation channel.

Has the advantages that: compared with the prior art, the multimode cooling integrated power lithium battery pack has the advantages that the battery pack is structurally arranged in the closed box body to play a role in heat insulation and water resistance, heat generated by discharge of the battery pack is taken away in a liquid cooling and air cooling combined mode, instantaneous heat increase of a battery is avoided, a liquid cooling device is arranged among the lithium battery units to complete heat convection, the bottom of each lithium battery unit is provided with the strip-shaped through hole, and an air heat dissipation channel is formed by natural air flow in the strip-shaped through holes in the walking process of an automobile to take away heat conducted to the bottom in the lithium battery units; the liquid cooling device is internally provided with the left and right temperature adjusting chambers, heat exchange media enter the liquid inlet pipe in the left temperature adjusting chamber and then enter the latticed water pipe through the liquid outlet at the lower end of the liquid inlet pipe, then enter the right temperature adjusting chamber through the liquid guide hole and then enter the liquid outlet pipe through the liquid inlet hole and finally flow out of the liquid outlet pipe, and uneven distribution of the heat exchange media in the temperature adjusting unit is alleviated, so that deviation of heat exchange capacity in the flow direction is inhibited, different medium flow paths are arranged in the left and right temperature adjusting chambers, the distribution of the heat exchange media can be more effectively and smoothly carried out, and the heat exchange efficiency is improved. The multimode cooling integrated power lithium battery pack provided by the invention can greatly improve the reliability and the practicability of an electric automobile battery system and can prolong the service life of the electric automobile battery system.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is an exploded view of FIG. 1;

fig. 3 is a left side view of the liquid cooling apparatus 5 in fig. 1;

FIG. 4 is a right side view of the liquid cooling apparatus 5 of FIG. 1;

fig. 5 is a plan view of the liquid cooling device 5 in fig. 1.

Detailed Description

In order to make the technical solutions of the present invention better understood, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Example 1

As shown in fig. 1-5, a multimode cooling integrated power lithium battery pack includes a battery box 1 and a plurality of lithium battery units 2 vertically arranged in the battery box 1, the plurality of lithium battery units 2 are arranged in parallel, a liquid inlet main pipe 3 and a liquid outlet main pipe 4 horizontally penetrate above the lithium battery units 2, the plurality of lithium battery units 2 are distributed along the length direction of the liquid inlet main pipe 3 and the liquid outlet main pipe 4, a liquid cooling device 5 is clamped between two adjacent lithium battery units 2, the liquid cooling device 5 includes a vertically arranged liquid cooling box 5a, a vertical partition plate 5b is arranged in the liquid cooling box 5a, the liquid cooling box 5a is divided into a left temperature adjusting part and a right temperature adjusting part by the vertical partition plate 5b, a liquid inlet pipe 5c is arranged in the left temperature adjusting part, and a liquid inlet of the liquid inlet pipe 5c is communicated with the liquid inlet main pipe 3, a liquid outlet pipe 5d is arranged in the right temperature adjusting part, a liquid outlet of the liquid outlet pipe 5d is communicated with a liquid outlet header pipe 4, a liquid guide hole 5e is formed in the upper part of the vertical partition plate 5b, and a liquid cooling channel is formed among the liquid inlet header pipe 3, the liquid inlet pipe 5c, the liquid guide hole 5e, the liquid outlet pipe 5d and the liquid outlet header pipe 4; the bottom of battery box 1 is seted up with 2 one-to-one's of lithium cell mounting groove 9a, bar through-hole 10 has been seted up to the bottom level of battery box 1, bar through-hole 10 is located the below of mounting groove 9a, seted up a plurality of bleeder vents 9b in mounting groove 9a, bleeder vent 9b with bar through-hole 10 intercommunication forms the air heat dissipation passageway.

As can be seen from fig. 2, 3 and 4, the liquid inlet pipe 5c and the liquid outlet pipe 5d are respectively disposed near the wall of the battery box 1, any two sides of the liquid cooling box 5a are respectively attached to the outer walls of the adjacent lithium battery cells 2, the other two sides of the liquid cooling box 5a are respectively and vertically connected with T-shaped protruding strips 8a, and T-shaped grooves 8b adapted to the T-shaped protruding strips 8a are vertically formed in the wall of the battery box 1

As can be seen in fig. 3, 4 and 5, the upper ends of the liquid inlet pipe 5c and the liquid outlet pipe 5d extend out of the liquid cooling box 5a and then are respectively communicated with the liquid inlet header pipe 3 and the liquid outlet header pipe 4, the lower ends of the liquid inlet pipe 5c and the liquid outlet pipe 5d are respectively fixedly connected with the inner wall of the liquid cooling device 5, the pipe walls of the liquid inlet pipe 5c and the liquid outlet pipe 5d are respectively provided with a liquid outlet hole 5f and a liquid inlet hole 5g, and the liquid flowing directions in the liquid inlet pipe 5c and the liquid outlet pipe 5d are opposite;

be equipped with latticed water pipe 6 and a plurality of column reposition of redundant personnel post 7 on the side about vertical baffle 5b respectively, latticed water pipe 6 is located in the left side portion that adjusts the temperature, it is located to go out liquid hole 5f the lower part of feed liquor pipe 5c, latticed water pipe 6's water inlet is close to go out liquid hole 5f and set up, latticed water pipe 6's delivery port is close to lead liquid hole 5e to set up, a plurality of 7 dot matrix distributions of column reposition of redundant personnel post are in the right side portion that adjusts the temperature, feed liquor hole 5g is from last evenly distributed extremely down on the drain pipe 5 d.

Finally, it should be noted that the above-mentioned description is only a preferred embodiment of the present invention, and that those skilled in the art can make various similar representations without departing from the spirit and scope of the present invention.

Claims

1. The utility model provides a multimode cooling integration power lithium cell group, includes battery box (1) and a plurality of lithium cell (2) of vertical setting in this battery box (1), its characterized in that: the lithium battery units (2) are placed in parallel, a liquid inlet main pipe (3) and a liquid outlet main pipe (4) are horizontally arranged above the lithium battery units (2) in a penetrating mode, the lithium battery units (2) are distributed along the length direction of the liquid inlet main pipe (3) and the liquid outlet main pipe (4), a liquid cooling device (5) is clamped between every two adjacent lithium battery units (2), the liquid cooling devices (5) are respectively communicated with the liquid inlet main pipe (3) and the liquid outlet main pipe (4) to form a liquid cooling channel, and an air heat dissipation channel is arranged at the bottom of the battery box body (1);

liquid cooling device (5) are including vertical liquid cooling box (5a) of placing, be equipped with vertical baffle (5b) in liquid cooling box (5a), this vertical baffle (5b) will liquid cooling box (5a) is separated for the portion that adjusts the temperature of a left side portion of adjusting the temperature and the portion that adjusts the temperature of the right side, be equipped with feed liquor pipe (5c) in the portion that adjusts the temperature of a left side, the inlet and the feed liquor house steward (3) intercommunication of feed liquor pipe (5c), be equipped with drain pipe (5d) in the portion that adjusts the temperature of the right side, the liquid outlet and the feed liquor house steward (4) intercommunication of drain pipe (5d), drain hole (5e) have been seted up on the upper portion of vertical baffle (5b), feed liquor house steward (3) feed liquor pipe (5c) drain hole (5e) drain pipe (5d) with form between the feed liquor house steward (4) the liquid cooling passageway.

2. The multimode cooling integrated power lithium battery pack according to claim 1, wherein: feed liquor pipe (5c) with drain pipe (5d) are close to respectively the tank wall setting of battery box (1), feed liquor pipe (5c) with the upper end of drain pipe (5d) all stretches out behind the liquid cooling box (5a) respectively with feed liquor house steward (3) and play liquid house steward (4) intercommunication, the lower extreme of feed liquor pipe (5c) and drain pipe (5d) respectively with the inner wall fixed connection of liquid cooling device (5), feed liquor pipe (5c) with drain hole (5f) and feed liquor hole (5g) have been seted up on the pipe wall of drain pipe (5d) respectively, feed liquor pipe (5c) with liquid circulation opposite direction in drain pipe (5 d).

3. The multimode cooling integrated power lithium battery pack according to claim 1 or 2, characterized in that: be equipped with latticed water pipe (6) and a plurality of column reposition of redundant personnel post (7) on the side about vertical baffle (5b) respectively, latticed water pipe (6) are located in a left side adjusts the temperature in the portion, it is located to go out liquid hole (5f) the lower part of feed liquor pipe (5c), the water inlet of latticed water pipe (6) is close to go out liquid hole (5f) setting, the delivery port of latticed water pipe (6) is close to drain hole (5e) sets up, and is a plurality of column reposition of redundant personnel post (7) dot matrix form distributes in the portion adjusts the temperature on the right side, feed liquor hole (5g) are from last evenly distributed down on drain pipe (5 d).

4. The multimode cooling integrated power lithium battery pack of claim 3, wherein: the battery box body (1) is characterized in that a mounting groove (9a) corresponding to the lithium battery unit (2) in a one-to-one mode is formed in the bottom of the battery box body (1), any two side faces of the liquid cooling box (5a) are respectively attached to the adjacent outer wall of the lithium battery unit (2), the other two side faces of the liquid cooling box (5a) are respectively and vertically connected with a T-shaped convex strip (8a), and a T-shaped groove (8b) matched with the T-shaped convex strip (8a) is vertically formed in the box wall of the battery box body (1).

5. The multimode cooling integrated power lithium battery pack according to claim 4, wherein: bar through-hole (10) have been seted up to the bottom level of battery box (1), bar through-hole (10) are located the below of mounting groove (9a), seted up a plurality of bleeder vents (9b) in mounting groove (9a), bleeder vent (9b) with bar through-hole (10) intercommunication forms air heat dissipation channel.