Battery module temperature control device

Abstract

The present invention relates to the field of battery technology, and in particular to a battery module temperature control device, comprising a battery body, an outer shell installed on the outside of the body, a surface of the body and an inner wall of the shell fixedly connected via heat dissipation strips, a heat dissipation cavity formed between adjacent heat dissipation strips, a branch water pipe for heat dissipation arranged in the heat dissipation cavity, special-shaped tubes fitted with outer surfaces of the branch water pipes arranged at four corners of the heat dissipation cavity, and expansion balls filled in the special-shaped tubes; a water temperature control circulation module drives water to circulate in a water tank and the branch water pipes to dissipate heat from the heat dissipation strips, and when the battery temperature is too low, the water temperature control circulation module can heat the water to maintain the battery temperature, and the water temperature control circulation module is also provided with a refrigeration module to actively cool the water to prevent the battery temperature from being too high.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and in particular to a battery module temperature control device. Background Art

[0002] There are two types of electric vehicle batteries: storage batteries and fuel cells. Storage batteries are suitable for pure electric vehicles, including lead-acid batteries, nickel-metal hydride batteries, sodium-sulfur batteries, secondary lithium batteries, air batteries, and ternary lithium batteries.

[0003] Currently, the use of batteries requires the design of temperature control devices to prevent the batteries from overheating or overcooling. In order to dissipate the heat of the batteries during use, an air-conditioning refrigeration system is generally added to the battery layout space or a phase change material (solid material absorbs heat and melts into liquid) is used to wrap the battery to dissipate heat. However, existing technologies are difficult to automatically extinguish fires when the battery spontaneously combusts, and the safety factor is low. Summary of the invention

[0004] In order to solve the deficiency of the prior art that it is difficult to automatically extinguish the fire when the battery spontaneously ignites, the present invention provides a battery module temperature control device.

[0005] The technical solution of the present invention is:

[0006] The present invention provides a battery module temperature control device, comprising a battery body, an outer shell installed on the outside of the body, a surface of the body and an inner wall of the shell fixedly connected by heat dissipation strips, a heat dissipation cavity is formed between adjacent heat dissipation strips, a branch water pipe for heat dissipation is arranged in the heat dissipation cavity, special-shaped tubes in contact with the outer surface of the branch water pipe are arranged at four corners of the heat dissipation cavity, and the special-shaped tubes are filled with expansion balls.

[0007] Furthermore, liquid carbon dioxide is sealed in the expansion ball.

[0008] Furthermore, a plurality of puncture needles are provided on one side of the special-shaped tube facing the branch water pipe.

[0009] Furthermore, a water tank is provided on the side of the shell, and the water tank is provided with a first interface and a second interface. The first interface is connected to one end of the first tube, and the other end of the first tube is connected to the inlet of the water temperature control circulation module. The outlet of the water temperature control circulation module is connected to one end of the second tube, and the second tube is connected to one end of the branch water pipe, and the other end of the branch water pipe is connected to the second interface of the water tank through a third tube.

[0010] Furthermore, a shell is arranged outside the water tank, and the shell is filled with expansion balls.

[0011] Furthermore, the water temperature control circulation module is provided with a heating module.

[0012] Furthermore, the water temperature control circulation module is provided with a refrigeration module.

[0013] The beneficial effects achieved by the present invention are:

[0014] The water temperature control circulation module of the present invention drives water to circulate in the water tank and the branch water pipe to dissipate heat from the heat dissipation strip. When the battery temperature is too low, the water temperature control circulation module can heat the water to maintain the temperature of the battery. The water temperature control circulation module is also provided with a refrigeration module to actively cool the water to prevent the battery temperature from being too high. When the battery is damaged and locally overheated, the heat dissipation strip at the overheated part will generate high temperature, and the heat dissipation cavity here will also generate high temperature, which heats the expansion ball in the special-shaped tube. When the temperature exceeds a certain temperature, the liquid carbon dioxide in the expansion ball generates high pressure due to the increase in temperature, causing the expansion ball to rupture, and the carbon dioxide overflows to expand the special-shaped tube, and the puncture needle pierces the branch water pipe. The water in the branch water pipe leaks to directly cool this place. If the battery burns, the overflowing water extinguishes the flame. Due to the rupture of the high-pressure special-shaped tube, the carbon dioxide overflows and fills the internal space of the shell, thereby isolating the battery from oxygen, slowing down the combustion trend, and even extinguishing the flame. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0016] Figure 2 yes Figure 1 Schematic diagram of the local enlarged structure of Part I.

[0017] Figure 3 yes Figure 1 Schematic diagram of the local enlarged structure of Part II. DETAILED DESCRIPTION

[0018] To facilitate those skilled in the art to understand the present invention, specific implementations of the present invention are described below with reference to the accompanying drawings.

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0021] It should be noted that when a component is referred to as being "mounted on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a central component at the same time. When a component is considered to be "fixed to" another component, it may be directly fixed on the other component or there may be a central component at the same time.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "or / and" used herein includes any and all combinations of one or more of the related listed items.

[0023] like Figures 1 to 3 As shown, the present invention provides a battery module temperature control device, including a battery body 1, an outer shell 2 is installed on the outside of the body 1, the surface of the body is fixedly connected to the inner wall of the shell 2 by a heat dissipation strip 3, a heat dissipation cavity 4 is formed between adjacent heat dissipation strips, a branch water pipe 4 for heat dissipation is arranged in the heat dissipation cavity, and special-shaped tubes 5 that are in contact with the outer surface of the branch water pipe 4 are arranged at four corners of the heat dissipation cavity, the special-shaped tube 5 is filled with an expansion ball 6, and liquid carbon dioxide is sealed in the expansion ball. A plurality of puncture needles 12 are arranged on a side of the special-shaped tube 5 facing the branch water pipe 4.

[0024] A water tank 7 is provided on the side of the shell, and a shell 8 is provided outside the water tank 7. The shell 8 is also filled with an expansion ball 6. The water tank 7 is provided with a first interface and a second interface. The first interface is connected to one end of the first tube, and the other end of the first tube is connected to the inlet of the water temperature control circulation module 9. The outlet of the water temperature control circulation module 9 is connected to one end of the second tube 10. The second tube is connected to one end of the branch water pipe 4, and the other end of the branch water pipe is connected to the second interface of the water tank through the third tube 11. The water temperature control circulation module drives water to circulate in the water tank and the branch water pipe to dissipate heat to the heat dissipation strip. When the battery temperature is too low, the water temperature control circulation module is provided with a heating module to heat the water to maintain the temperature of the battery. The water temperature control circulation module is also provided with a refrigeration module to actively cool the water to avoid the battery temperature being too high.

[0025] When the device is in use, the water temperature control circulation module drives water to circulate in the water tank and the branch water pipe to dissipate heat from the heat sink. When the battery temperature is too low, the water temperature control circulation module can heat the water to maintain the temperature of the battery. The water temperature control circulation module is also provided with a refrigeration module to actively cool the water to prevent the battery temperature from being too high. When the battery is damaged and locally overheated, the heat sink at the overheated part will generate high temperature, and high temperature will also be generated in the heat dissipation cavity here. The high temperature heats the expansion ball in the special-shaped tube. When the temperature exceeds a certain temperature, the liquid carbon dioxide in the expansion ball generates high pressure due to the increase in temperature, causing the expansion ball to rupture. The carbon dioxide overflows to expand the special-shaped tube, and the puncture needle pierces the branch water pipe. The water in the branch water pipe leaks to directly cool this place. If the battery burns, the overflowing water extinguishes the flame. Due to the rupture of the high-pressure special-shaped tube, the carbon dioxide overflows and fills the internal space of the shell, isolating the battery from oxygen, slowing down the combustion trend, and even extinguishing the flame.

[0026] If the high temperature generated by the burning battery spreads, it will heat the water tank, and the expansion ball 6 between the water tank and the shell will also expand and rupture. The high pressure will deform the water tank, and the water in the water tank will spray out from the ruptured branch pipe more quickly, hindering the spread of fire, protecting the car, and buying time for the passengers to escape.

[0027] The above-described embodiments of the present invention do not constitute a limitation on the protection scope of the present invention. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A battery module temperature control device, characterized in that: The invention comprises a battery body, an outer shell installed on the outside of the body, a surface of the body and an inner wall of the outer shell fixedly connected by heat dissipation strips, a heat dissipation cavity is formed between adjacent heat dissipation strips, a branch water pipe for heat dissipation is arranged in the heat dissipation cavity, special-shaped tubes in contact with the outer surfaces of the branch water pipes are arranged at four corners in the heat dissipation cavity, the special-shaped tubes are filled with expansion balls, liquid carbon dioxide is sealed in the expansion balls, a plurality of puncture needles are arranged on a side of the special-shaped tube facing the branch water pipe, a water tank is arranged on the side of the outer shell, the water tank is provided with a first interface and a second interface, the first interface is connected to one end of the first tube, the other end of the first tube is connected to the inlet of a water temperature control circulation module, the outlet of the water temperature control circulation module is connected to one end of the second tube, the second tube is connected to one end of the branch water pipe, and the other end of the branch water pipe is connected to the second interface of the water tank through a third tube.

2. A battery module temperature control device according to claim 1, characterized in that: A shell is arranged outside the water tank, and expansion balls are filled in the shell.

3. A battery module temperature control device according to claim 1, characterized in that: The water temperature control circulation module is provided with a heating module.

4. A battery module temperature control device according to claim 1, characterized in that: The water temperature control circulation module is provided with a refrigeration module.

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