Low-temperature long-acting lithium ion battery pack device
By introducing a PTC heating element, temperature sensor, and cooling fan into the low-temperature lithium-ion battery pack device, combined with the mechanical fixing of support springs and locking blocks, the problems of uneven heating and poor sealing of the battery pack in low-temperature environments are solved, and the safe and reliable use of the battery pack is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DONGGUAN GOLDEN PHOENIX ENERGY TECH CO LTD
- Filing Date
- 2025-04-27
- Publication Date
- 2026-05-01
AI Technical Summary
Existing low-temperature lithium-ion battery packs have low charging and discharging efficiency and pose safety hazards in low-temperature environments. They also have poor sealing performance, which can easily lead to local overheating or deformation of the sealing rings.
The design incorporates a PTC heating element, temperature sensor, and cooling fan, along with a mechanical fixing method using support springs, contact blocks, and locking blocks to ensure uniform heating and sealed contact inside the battery compartment. Thermally conductive silicone layer and aerogel insulation material are used to improve temperature control and sealing.
This technology enables uniform heating and sealing of the battery pack in low-temperature environments, improving the safety and sealing performance of the battery pack and ensuring its normal operation in low-temperature conditions.
Smart Images
Figure CN224191019U_ABST
Abstract
Description
A low-temperature long-life lithium-ion battery pack device Technical Field
[0001] This utility model relates to the field of lithium-ion battery pack technology, specifically to a low-temperature long-life lithium-ion battery pack device. Background Technology
[0002] Currently, lithium-ion batteries are widely used in various industries due to their advantages such as high voltage, large capacity, small size, and light weight, especially in the communications industry, where they are used as communication batteries. However, lithium-ion batteries are quite sensitive to the temperature of the operating environment, especially below 0°C where their charging and discharging efficiency is low, thus posing certain safety hazards when charging and discharging below 0°C.
[0003] The current low-temperature long-life lithium-ion battery pack device exhibits uneven heating within the battery pack. As a result, during use, it is prone to localized overheating or delayed heating inside the battery compartment, which affects the performance of the battery pack. In addition, the sealing contact between the cover and the body mostly relies on a sealing ring. Under prolonged pressure during use, the sealing ring is prone to deformation, which affects the sealing performance of subsequent sealing rings and is detrimental to subsequent use.
[0004] In summary, this utility model solves the problems in the background art by designing a low-temperature long-life lithium-ion battery pack device. Summary of the Invention
[0005] The purpose of this invention is to provide a low-temperature, long-life lithium-ion battery pack device to solve the problems mentioned in the background art.
[0006] To achieve the above objectives, this utility model provides the following technical solution:
[0007] A low-temperature long-life lithium-ion battery pack device includes a battery box and a cover on top of the battery box. Cooling fans are provided on both the left and right sides of the battery box. A mounting ring is fixedly installed on the top outer side of the battery box. A mounting hole is formed on the top surface of the mounting ring. A mounting groove is formed on the top surface of the battery box. A support spring and a contact block are respectively provided inside the mounting groove. A battery compartment is formed inside the battery box. A PTC heating element and a temperature sensor are respectively provided on the inner wall of the battery compartment. A placement groove is formed at the bottom of the battery compartment, and a battery is placed inside the placement groove. A mounting post is provided at the bottom of the cover, and a locking block is provided at the bottom of the mounting post.
[0008] As a preferred embodiment of this utility model, the heat dissipation end of the cooling fan extends into the interior of the battery compartment, and the air outlet end of the cooling fan is provided with a waterproof and breathable membrane.
[0009] As a preferred embodiment of this utility model, the temperature sensor and the PTC heating element are both distributed symmetrically from left to right along the internal central axis of the battery compartment.
[0010] As a preferred embodiment of this utility model, the type of battery is a lithium-ion battery, the inner wall of the battery compartment is filled with a thermally conductive silicone layer between it and the PTC heating element, and the outer wall of the battery compartment is covered with an aerogel heat insulation material.
[0011] As a preferred embodiment of this utility model, the mounting posts are located around the bottom of the box cover, and the outer surface of the mounting posts is fitted into the inner wall of the mounting holes.
[0012] As a preferred embodiment of this utility model, the cross-sectional dimensions of the locking block are consistent with those of the mounting post. The locking block rotates eccentrically with the bottom surface of the mounting post through an eccentric component, and the top of the locking block forms frictional contact with the bottom of the mounting ring block.
[0013] As a preferred embodiment of this utility model, the cross-sectional shape of the mounting groove is annular, the top and bottom ends of the support spring are fixed to the bottom of the contact block and the inner wall of the bottom end of the mounting groove, respectively, the outer surface of the contact block slides against the inner wall of the mounting groove, and the contact block is made of silicone rubber.
[0014] Compared with the prior art, the beneficial effects of this utility model are:
[0015] 1. In this utility model, a low-temperature long-life lithium-ion battery pack device is designed by means of a PTC heating element, a temperature sensor and a cooling fan. With the symmetrical arrangement of the PTC heating element and the temperature sensor, the battery compartment can be heated evenly, which facilitates the use of the battery pack in low-temperature environments and improves the practicality of the battery pack.
[0016] 2. In this utility model, a low-temperature long-life lithium-ion battery pack device is designed with a support spring, contact block, mounting post, mounting hole, and locking block. Under the contact between the mounting post and the mounting hole, and the eccentric rotation of the locking block, the cover and the battery box can be quickly positioned and fixed. The elastic support force of the support spring on the contact block causes the contact block to form a sealed contact with the bottom surface of the cover, thereby ensuring the sealing contact effect between the cover and the battery box, which is beneficial for subsequent use. Attached Figure Description
[0017] Figure 1 is a schematic diagram of the overall structure of this utility model;
[0018] Figure 2 is a schematic diagram of the structure of the present invention when the cover and battery box are separated;
[0019] Figure 3 is an exploded structural diagram of the mounting groove and contact block of this utility model.
[0020] In the diagram: 1. Battery box; 2. Box cover; 201. Mounting post; 202. Locking block; 3. Cooling fan; 4. Mounting ring block; 401. Mounting hole; 5. Mounting slot; 501. Support spring; 502. Contact block; 6. Battery compartment; 601. PTC heating element; 602. Temperature sensor; 603. Placement slot; 6031. Battery. Detailed Implementation
[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.
[0022] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, and several embodiments of the utility model will be provided. However, the utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and complete.
[0023] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.
[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0025] As illustrated in Figures 1-3, this utility model provides a technical solution:
[0026] A low-temperature long-life lithium-ion battery pack device includes a battery box 1 and a box cover 2 disposed on the top of the battery box 1. An installation ring block 4 is fixedly installed on the outer top of the battery box 1. An installation hole 401 is opened on the top surface of the installation ring block 4. An installation groove 5 is opened on the top surface of the battery box 1. A support spring 501 and a contact block 502 are respectively disposed inside the installation groove 5. A battery compartment 6 is opened inside the battery box 1. A placement groove 603 is opened at the bottom of the battery compartment 6. A storage battery 6031 is disposed inside the placement groove 603. An installation post 201 is disposed at the bottom of the box cover 2. A locking block 202 is disposed at the bottom of the installation post 201.
[0027] Specifically, the mounting posts 201 are located around the bottom of the cover 2, and the outer surface of the mounting posts 201 is fitted with the inner wall of the mounting holes 401. The cross-sectional dimensions of the locking block 202 are consistent with those of the mounting posts 201. The locking block 202 rotates eccentrically with the bottom surface of the mounting posts 201 through an eccentric component, and the top of the locking block 202 forms frictional contact with the bottom of the mounting ring block 4. The cross-sectional shape of the mounting groove 5 is an annular structure. The top and bottom ends of the support spring 501 are fixed to the bottom of the contact block 502 and the inner wall of the bottom end of the mounting groove 5, respectively. The outer surface of the contact block 502 slides against the inner wall of the mounting groove 5, and the contact block 502 is made of silicone rubber.
[0028] In this embodiment, the mounting post 201 is mainly used to make contact with the mounting hole 401, which enables the rapid positioning of the cover 2. Under the eccentric rotation of the locking block 202 and the mounting post 201, the locking block 202 and the bottom of the mounting ring block 4 form a frictional contact, which can fix the cover 2. The support spring 501 is mainly used to apply an upward preload to the contact block 502, which causes the contact block 502 and the cover 2 to form a sealed contact, thus meeting the sealing requirements between the cover 2 and the battery box 1.
[0029] In this embodiment, please refer to Figures 2 and 3. Cooling fans 3 are provided on both the left and right sides of the battery box 1, and PTC heating elements 601 and temperature sensors 602 are respectively provided on the inner wall of the battery compartment 6.
[0030] Specifically, the heat dissipation end of the cooling fan 3 extends into the interior of the battery compartment 6, and the air outlet of the cooling fan 3 is provided with a waterproof and breathable membrane. The temperature sensor 602 and the PTC heating element 601 are both distributed symmetrically on the left and right sides through the internal central axis of the battery compartment 6. The battery 6031 is a lithium-ion battery. A thermally conductive silicone layer is filled between the inner wall of the battery compartment 6 and the PTC heating element 601. The outer wall of the battery compartment 6 is covered with aerogel heat insulation material.
[0031] In this embodiment, the cooling fan 3, PTC heating element 601, and temperature sensor 602 are all electrically connected to the controller via wires. The temperature sensor 602 is mainly used to detect the internal temperature of the battery compartment 6. The symmetrical distribution of the PTC heating element 601 and the combination with the thermally conductive silicone layer enable uniform heating of the inside of the battery compartment 6. The cooling fan 3 is mainly used to dissipate heat from the inside of the battery compartment 6, meeting the temperature control requirements of the battery pack and facilitating its use in low-temperature environments.
[0032] The working process of this utility model is as follows: When using a low-temperature long-life lithium-ion battery pack device, the cover 2 is moved so that it is close to the battery box 1. During the close-up process, the mounting post 201 is ensured to engage with the mounting hole 401. When the mounting post 201 is fully engaged with the mounting hole 401, the locking block 202 is rotated, causing the locking block 202 to rub against the bottom of the mounting ring block 4 and form a mechanical self-lock. At the same time, the support spring 501 provides elastic support to the contact block 502, causing the contact block 502 to engage with the cover 2. The sealed contact effectively seals and secures the cover 2 and battery compartment 1, facilitating subsequent use. Finally, the temperature sensor 602 detects the internal temperature of the battery compartment 6. When the temperature falls below a set threshold, the controller activates the PTC heating element 601, which uniformly heats the interior of the battery compartment 6. Simultaneously, when the temperature exceeds the set threshold, the cooling fan 3 starts and accelerates the expulsion of hot air, ensuring a safe operating environment for the battery pack and enabling its use in low-temperature environments.
[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A low-temperature long-life lithium-ion battery pack device, comprising a battery box (1) and a box cover (2) disposed on the top of the battery box (1), characterized in that: Cooling fans (3) are provided on both the left and right sides of the battery box (1). A mounting ring block (4) is fixedly installed on the top outer side of the battery box (1). A mounting hole (401) is opened on the top surface of the mounting ring block (4). A mounting groove (5) is opened on the top surface of the battery box (1). A support spring (501) and a contact block (502) are respectively provided inside the mounting groove (5). A battery compartment (6) is opened inside the battery box (1). A PTC heating element (601) and a temperature sensor (602) are respectively provided on the inner wall of the battery compartment (6). A placement groove (603) is opened at the bottom of the battery compartment (6). A storage battery (6031) is placed inside the placement groove (603). A mounting post (201) is provided at the bottom of the box cover (2). A locking block (202) is provided at the bottom of the mounting post (201).
2. The low temperature long life lithium-ion battery pack device of claim 1, wherein: The heat dissipation end of the cooling fan (3) extends into the interior of the battery compartment (6), and the air outlet end of the cooling fan (3) is provided with a waterproof and breathable membrane.
3. The low temperature long life lithium-ion battery pack device of claim 1, wherein: The temperature sensor (602) and the PTC heating element (601) are both distributed symmetrically on the left and right sides, passing through the internal central axis of the battery compartment (6).
4. The low temperature long life lithium-ion battery pack device of claim 1, wherein: The battery (6031) is a lithium-ion battery. The inner wall of the battery compartment (6) and the PTC heating element (601) are filled with a thermally conductive silicone layer. The outer wall of the battery compartment (6) is covered with an aerogel heat insulation material.
5. The low-temperature long-life lithium-ion battery pack device according to claim 1, characterized in that: The mounting posts (201) are located around the bottom of the cover (2), and the outer surface of the mounting posts (201) is fitted into the inner wall of the mounting holes (401).
6. The low temperature long life lithium-ion battery pack device of claim 1, wherein: The cross-sectional dimensions of the locking block (202) are consistent with those of the mounting post (201). The locking block (202) rotates eccentrically with the bottom surface of the mounting post (201) through an eccentric component, and the top of the locking block (202) forms a frictional contact with the bottom of the mounting ring block (4).
7. The low temperature long life lithium-ion battery pack device of claim 1, wherein: The cross-sectional shape of the mounting groove (5) is annular. The top and bottom ends of the support spring (501) are fixed to the bottom of the contact block (502) and the inner wall of the bottom end of the mounting groove (5), respectively. The outer surface of the contact block (502) slides against the inner wall of the mounting groove (5), and the contact block (502) is made of silicone rubber.