A new energy battery pack safety protection device

Abstract

The utility model discloses a new energy battery pack safety device relates to battery pack protection device technical field. Including including heat insulation outer package shell, the inner wall between heat insulation outer package shell is provided with a set of heat insulation baffle, the inner wall of heat insulation baffle is surrounded and forms a plurality of containing chamber, the inner wall between each containing chamber is fixedly connected with a battery main body, the both sides fixed communication of heat insulation outer package shell has a plurality of through pressure pipe. The utility model discloses through the setting of heat insulation outer package shell, heat insulation cover and heat insulation baffle, and different battery unit is separated, when one battery unit overheat expansion, and its heat has less influence to other battery unit, and simultaneously through the setting of through pressure pipe and pressure relief frame, when corresponding battery unit expansion, the pressure in its inside pushes the inert gas stored in through pressure pipe, and the sealed sliding block is lifted, thereby the pressure generated in battery main body is discharged and prevents the deformation breakage of battery main body, prolongs the service life of device.

Description

Technical Field

[0001] This utility model relates to the technical field of battery pack protection devices, specifically a safety protection device for new energy battery packs. Background Technology

[0002] With the development of the times, the world is paying increasing attention to environmental protection. To protect the environment, my country has begun to vigorously promote the development of new energy vehicles. New energy vehicles offer numerous benefits, including environmental protection, high energy efficiency, resource sustainability, reduced noise pollution, economic benefits, and technological innovation. These vehicles use unconventional vehicle fuels as their power source, including new energy battery packs, representing low-carbon, environmentally friendly, and energy-saving technologies. Because battery packs are fragile, they are generally equipped with protective devices. An existing new energy battery pack safety protection device (announcement number: CN222690804U) has revealed at least the following defects during use: The above-mentioned solution uses a protective device with an energy-absorbing structure. When an impact occurs, it is first transmitted to the connecting rod, and then the connecting rod transmits the impact to the pressure cap. The pressure cap then presses down on the spring, which deforms and absorbs the energy, thus reducing the damage to the battery pack caused by impacts. The arc-shaped design of the buffer plate can buffer the impact first. Combined with the energy-absorbing structure, it can greatly improve the safety of the battery pack and reduce the damage caused by front-end impacts. However, in actual use, after long-term use, the battery inevitably bulges, generating greater internal pressure, eventually leading to rupture, leakage, or even explosion and spontaneous combustion. Therefore, it is necessary to develop a safety protection device for new energy battery packs. Utility Model Content

[0003] The main purpose of this utility model is to provide a safety protection device for new energy battery packs, which can effectively solve the problems in the background art.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A safety protection device for a new energy battery pack includes a heat-insulating outer shell. A set of heat-insulating baffles is arranged between the inner walls of the heat-insulating outer shell. The inner walls of the heat-insulating baffles form multiple receiving chambers. A battery body is fixedly connected between the inner walls of each receiving chamber. A heat-insulating cover plate is fixedly connected to each side of the heat-insulating outer shell. Multiple pressure strips are fixedly connected to the opposite sides of the two heat-insulating cover plates. The surface of each pressure strip is in contact with the surface of the corresponding battery body. Multiple pressure pipes are fixedly connected to both sides of the heat-insulating outer shell. Two adjacent pressure strips and each heat-insulating baffle and adjacent pressure strip form a pressure relief chamber. Each pressure pipe is connected to the interior of a pressure relief chamber.

[0005] Preferably, the outer ends of all the pressure pipes on the same side are connected to a pressure relief frame, and a telescopic cavity wall is fixedly connected to the opposite sides of the two pressure relief frames. A sealing slider is slidably connected between the inner walls of the two telescopic cavity walls.

[0006] Preferably, a pressure relief spring is fixedly connected to the outer side of each of the telescopic cavity walls, and a ring of blocking slides is fixedly connected to the outer edge of each of the sealing sliders. The outer edge of each ring of blocking slides is slidably connected to the inner edge of the outer end of the corresponding telescopic cavity wall, and the inner side of each ring of blocking slides is fixedly connected to the corresponding pressure relief spring.

[0007] Preferably, a set of support plates is fixedly connected to both sides of the heat insulation outer shell, and the outer end of each set of support plates is fixedly connected to the inner wall of a support side frame, which is fixedly connected to the outer edge of the corresponding pressure relief frame.

[0008] Preferably, a set of symmetrically distributed energy-absorbing boxes are fixedly connected to the opposite sides of the two supporting side frames, and a mounting plate is fixedly connected to the outer side of each set of energy-absorbing boxes.

[0009] Preferably, each end of the two supporting side frames is fixedly connected to a connecting crossbeam, and the opposite sides of the two connecting crossbeams are fixedly connected to the heat insulation outer shell. The opposite sides of the two connecting crossbeams are fixedly connected to another set of energy-absorbing boxes and corresponding mounting plates.

[0010] Preferably, two sets of symmetrically distributed fixing beams are fixedly connected between the opposite sides of the two supporting side frames, and the opposite sides of the two sets of fixing beams are in close contact with the corresponding heat insulation cover plate.

[0011] Compared with the prior art, the present invention has the following beneficial effects: By using an insulated outer shell, insulated cover, and insulated baffles, different battery cells are separated. When one battery cell overheats and expands, its heat has less impact on other battery cells. At the same time, by using a pressure pipe and a pressure relief frame, when the corresponding battery cell expands, the internal pressure pushes the inert gas stored in the pressure pipe, which lifts the sealing slider, thereby releasing the pressure generated in the battery body and preventing the battery body from deforming and breaking, thus extending the service life of the device. Attached Figure Description

[0012] Figure 1 This is an isometric view of the present invention; Figure 2 This is a schematic diagram of the main structure of the battery pack of this utility model; Figure 3 This is a schematic diagram of the pressure relief frame structure of this utility model; Figure 4This is a schematic diagram of the protective shell structure of this utility model.

[0013] In the diagram: 101, heat-insulating outer shell; 102, heat-insulating cover plate; 103, pressure strip; 104, pressure relief pipe; 105, pressure inlet pipe; 106, battery body; 107, heat-insulating baffle; 201, pressure relief frame; 202, telescopic cavity wall; 203, shielding slide; 204, pressure relief spring; 205, sealing slider; 301, connecting crossbeam; 302, supporting side frame; 303, energy absorption box; 304, mounting plate; 305, support plate; 306, fixing clamp beam. Detailed Implementation

[0014] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0015] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0016] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0017] Please see Figures 1-4 This utility model provides a technical solution: A safety protection device for a new energy battery pack includes a heat-insulating outer shell 101. A set of heat-insulating baffles 107 are arranged between the inner walls of the heat-insulating outer shell 101. The inner walls of the heat-insulating baffles 107 form multiple receiving chambers. A battery body 106 is fixedly connected between the inner walls of each receiving chamber. A heat-insulating cover plate 102 is fixedly connected to each side of the heat-insulating outer shell 101. Multiple pressure strips 103 are fixedly connected to the opposite sides of the two heat-insulating cover plates 102. The surface of each pressure strip 103 is in contact with the surface of the corresponding battery body 106. The position of the corresponding battery body 106 is determined by the arrangement of the heat-insulating baffles 107 and the pressure strips 103 to prevent it from shaking.

[0018] Multiple pressure pipes 105 are fixedly connected to both sides of the heat-insulating outer shell 101. Each pair of adjacent pressure-fixing strips 103, each heat-insulating baffle 107, and each adjacent pressure-fixing strip 103 form a pressure-relief chamber, with each pressure pipe 105 connected to the interior of one of these chambers. All the pressure pipes 105 on the same side share a common outer connection to a pressure-relief frame 201. A telescopic cavity wall 202 is fixedly connected to the opposite sides of each of the two pressure-relief frames 201. A sealing slider 205 is slidably connected between the inner walls of each telescopic cavity wall 202. A pressure-relief spring 204 is fixedly connected to the outer side of each telescopic cavity wall 202. A ring of shielding slides 203 is fixedly connected to the outer edge of each sealing slider 205. The outer edge of each ring of shielding slides 203 is slidably connected to the inner edge of the corresponding outer end of the telescopic cavity wall 202, and the inner side of each ring of shielding slides 203 is fixedly connected to the corresponding pressure-relief spring 204. In this embodiment, the pressure relief frame 201 and the pressure inlet pipe 105 are filled with inert gas to protect the inside of the battery. When high pressure is generated inside the battery, it will push the inert gas outward, compress the pressure relief spring 204, and lift the sealing slider 205 to perform pressure relief. Each pressure relief frame 201 is fixedly connected to a pressure relief pipe 104 on its outer edge to guide the high-pressure inert gas to a safe area for discharge.

[0019] A set of support plates 305 are fixedly connected to both sides of the heat-insulating outer shell 101. The outer end of each set of support plates 305 is fixedly connected to the inner wall of a support side frame 302, which is also fixedly connected to the outer edge of the corresponding pressure relief frame 201. A set of symmetrically distributed energy-absorbing boxes 303 are fixedly connected to the opposite sides of the two support side frames 302. A mounting plate 304 is fixedly connected to the outer side of each set of energy-absorbing boxes 303. A connecting crossbeam 301 is fixedly connected to both ends of the two support side frames 302. The opposite sides of the two connecting crossbeams 301 are fixedly connected to the heat-insulating outer shell 101, and another set of energy-absorbing boxes 303 and a corresponding mounting plate 304 are fixedly connected to the opposite sides of the two connecting crossbeams 301. Two sets of symmetrically distributed fixing beams 306 are fixedly connected between the opposite sides of the two support side frames 302. The opposite sides of the two sets of fixing beams 306 are tightly fitted to the corresponding heat-insulating cover plate 102. In this embodiment, the mounting plate 304 is fixedly connected to the interior of the new energy vehicle body for installing the device, and the energy-absorbing box 303 is a common automotive energy-absorbing box 303, which can absorb the energy of impact.

[0020] It should be noted that this utility model, as a safety protection device for a new energy battery pack, separates different battery units through the setting of the heat-insulating outer shell 101, heat-insulating cover plate 102, and heat-insulating baffle 107. When one battery unit overheats and expands, its heat has less impact on other battery units. At the same time, through the setting of the pressure pipe 105 and the pressure discharge frame 201, when the corresponding battery unit expands, the internal pressure pushes the inert gas stored in the pressure pipe 105 to lift the sealing slider 205, thereby venting the pressure generated in the battery body 106 and preventing the battery body 106 from deforming and breaking, thus extending the service life of the device.

[0021] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended embodiments and their equivalents.

Claims

1. A safety protection device for a new energy battery pack, comprising a heat-insulating outer shell (101), characterized in that: A set of heat-insulating baffles (107) is provided between the inner walls of the heat-insulating outer shell (101). The inner walls of the heat-insulating baffles (107) form multiple receiving chambers. A battery body (106) is fixedly connected between the inner walls of each receiving chamber. A heat-insulating cover plate (102) is fixedly connected to each side of the heat-insulating outer shell (101). Multiple pressure strips (103) are fixedly connected to the opposite sides of the two heat-insulating cover plates (102). Each pressure strip... The surfaces of the pressure strips (103) are in contact with the corresponding surfaces of the battery body (106). Multiple pressure pipes (105) are fixedly connected to both sides of the heat insulation outer shell (101). Two adjacent pressure strips (103) and each heat insulation baffle (107) and adjacent pressure strips (103) form a pressure relief cavity. Each pressure pipe (105) corresponds to a pressure relief cavity and is connected to the interior of the corresponding battery body (106) through the corresponding pressure relief cavity.

2. The safety protection device for a new energy battery pack according to claim 1, characterized in that: All the pressure pipes (105) on the same side are connected to a pressure relief frame (201) at their outer ends. A telescopic cavity wall (202) is fixedly connected to the opposite sides of the two pressure relief frames (201). A sealing slider (205) is slidably connected between the inner walls of the two telescopic cavity walls (202).

3. The safety protection device for a new energy battery pack according to claim 2, characterized in that: A pressure relief spring (204) is fixedly connected to the outer side of each of the telescopic cavity walls (202), and a ring of shielding slides (203) is fixedly connected to the outer edge of each of the sealing sliders (205). The outer edge of each ring of shielding slides (203) is slidably connected to the inner edge of the outer end of the corresponding telescopic cavity wall (202), and the inner side of each ring of shielding slides (203) is fixedly connected to the corresponding pressure relief spring (204).

4. A safety protection device for a new energy battery pack according to claim 2, characterized in that: A set of support plates (305) are fixedly connected to both sides of the heat insulation outer shell (101). The outer end of each set of support plates (305) is fixedly connected to the inner wall of a support side frame (302), which is fixedly connected to the outer edge of the corresponding pressure relief frame (201).

5. A safety protection device for a new energy battery pack according to claim 4, characterized in that: A set of symmetrically distributed energy-absorbing boxes (303) are fixedly connected to the opposite sides of the two support side frames (302), and a mounting plate (304) is fixedly connected to the outer side of each set of energy-absorbing boxes (303).

6. A safety protection device for a new energy battery pack according to claim 4, characterized in that: Two supporting side frames (302) are fixedly connected to a connecting cross frame (301) at both ends. The opposite sides of the two connecting cross frames (301) are fixedly connected to the heat insulation outer shell (101). The opposite sides of the two connecting cross frames (301) are fixedly connected to another set of energy-absorbing boxes (303) and corresponding mounting plates (304).

7. A safety protection device for a new energy battery pack according to claim 4, characterized in that: Two sets of symmetrically distributed fixed clamping beams (306) are fixedly connected between the opposite sides of the two supporting side frames (302), and the opposite sides of the two sets of fixed clamping beams (306) are in close contact with the corresponding heat insulation cover plate (102).

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