Novel lithium ion battery pack

Abstract

The utility model relates to the technical field of lithium ion batteries, in particular to a novel lithium ion battery pack. A novel lithium ion battery pack comprises a box body and is characterized in that a battery pack and a safety communication system are installed in the box body, the battery pack is formed by connecting a plurality of battery cell units in series and in parallel, the battery cell units are installed on a battery cell support set, and the battery cell units and the battery cell support set are both in modular design. And a box cover is arranged at the top of the box body. The novel lithium ion battery pack solves the problems of long production time, short service life, low performance, poor safety and high cost, and achieves the purposes of short production time, long service life, high performance, high safety and low cost.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium ion batteries, in particular to a novel lithium ion battery pack. Background Art

[0002] With the rapid development of electric motorcycles and electric tricycles, the demand for lithium-ion batteries with high energy density, high power density, long life and safety is growing. However, there are some problems in the manufacturing, use and maintenance of existing lithium-ion battery packs. For example, during charging or discharging, lithium batteries may cause thermal runaway due to internal short circuits, overcharging, over-discharging or mechanical damage, resulting in high temperatures and even fire or explosion. This may cause serious personal injury and property damage; external damage to the lithium battery shell such as puncture, extrusion or vibration may cause safety hazards such as electrolyte leakage, short circuit or fire. Therefore, it is necessary to design a new type of lithium-ion battery pack to solve these problems. For example, the Chinese patent with publication number CN215955383U discloses a lithium-ion battery and provides the following technical solution. The utility model relates to the field of lithium-ion batteries and discloses a lithium-ion battery, which includes: a housing, on which a discharge interface for an external connector and a charging interface for accessing an external charging circuit are provided; a charge and discharge control circuit module is fixed in the housing, and is electrically connected to the electrodes of each battery cell to connect each battery cell in series or in parallel or in combination of series and parallel to form a battery pack body; the control circuit of the charge and discharge control circuit module is electrically connected to the charging interface and the discharge interface; the voltage sampling circuit of the charge and discharge control circuit module is electrically connected to each battery cell, and the voltage sampling circuit is used to sample the voltage of each battery cell, so that the control circuit can control the conduction or disconnection of the charging circuit of each battery cell according to each sampled voltage. The application of this technical solution is conducive to improving the application safety of lithium-ion batteries and extending the battery life; and improving the convenience of discharge connection.

[0003] However, a lithium-ion battery of the above structure has assembly problems, high production time and cost. Similarly, the battery life of this design is short and the performance is low, and it is difficult to reduce the safety risks in the storage or use of the battery pack. Utility Model Content

[0004] In view of the problems of long production time, short service life, low performance, poor safety and high cost described in the background technology, the utility model proposes a new lithium-ion battery pack, which achieves the goals of short production time, long service life, high performance, high safety and low cost.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a new type of lithium-ion battery pack, including a box body, and also includes: a battery pack and a safety communication system are installed in the box body, the battery pack is composed of a plurality of battery cells connected in series and in parallel, the battery cells are installed on a power management group, the battery cells and the power management group both adopt a modular design, and a box cover is provided on the top of the box body.

[0006] The new lithium-ion battery pack adopts a modular design, which makes the battery cell units and bracket components easier to assemble and replace, improving the efficiency of maintenance and repair.

[0007] Preferably, the power management group comprises a positive electrode bracket and a negative electrode bracket, the positive electrode bracket is arranged on the positive terminal of the battery cell unit, and the negative electrode bracket is arranged on the negative terminal of the battery cell unit.

[0008] The provision of the positive and negative electrode brackets helps ensure that the battery cells are firmly fixed, reduces the impact of vibration and external damage on the battery pack, and improves overall safety.

[0009] Preferably, the safety communication system includes a power management system unit, a structural protection unit and a communication unit, the power management system unit is arranged between the top of the battery pack and the box cover, and the structural protection unit includes a plurality of protection plates and a plurality of metal sheets.

[0010] The safety communication system includes a power management system unit and a structural protection unit, which helps monitor the battery status, feedback data in real time, and take measures to protect battery components, thereby improving the safety and stability of the battery pack.

[0011] Preferably, the protection plate is located around the battery pack and the power management group, the metal sheet is provided between the protection plate and the power management group, the metal sheet is installed on the power management group, the metal sheet is in the shape of a parallelogram, and a PCB board is provided between the metal sheet and the protection plate.

[0012] The design of the protection plate and metal sheet helps to enhance the structural strength and shock resistance of the battery pack, reduce damage to battery components caused by external impacts, and improve overall safety.

[0013] Preferably, a discharge port and a vibration head are provided on the box cover, and the vibration head is connected to each of the battery cells through the communication unit.

[0014] The discharge port and vibration head on the box cover connect each battery cell through a communication unit, which helps to achieve balanced discharge and communication inside the battery pack, improving the performance and safety of the battery pack.

[0015] Preferably, a plurality of flexible strips are installed between the outer side of the protection plate and the inner side of the box body.

[0016] The installation of flexible strips can reduce friction and collision between battery components, reduce the impact of vibration and external impact on battery components, and extend the service life of the battery pack.

[0017] Preferably, the protection plate is made of fiberglass board.

[0018] Using glass fiber board as the protective board material has the advantages of lightweight, corrosion resistance, and high temperature resistance, which improves the overall performance and safety of the battery pack.

[0019] Preferably, the metal sheet is an aluminum sheet.

[0020] As a metal sheet material, aluminum sheet has good thermal conductivity and strength, which helps to dissipate heat and enhance the structural stability of the battery assembly, thereby improving the safety and reliability of the battery pack.

[0021] Preferably, the flexible strip is made of foam.

[0022] Using foam as the flexible strip material has good cushioning and shock absorption properties, which can effectively reduce the collision and vibration between battery components and protect the battery components from external damage.

[0023] Compared with the prior art, the beneficial effects of the utility model are:

[0024] 1. The modular design simplifies the assembly process of the battery pack, allowing it to be quickly assembled into a standard lithium-ion battery pack. This not only reduces production time and cost, but also improves production efficiency and flexibility.

[0025] 2. The use of high energy density and high power density lithium-ion battery cells gives the battery pack a longer service life and higher endurance. This means that users can use the device for longer periods of time without frequent charging, improving user experience and device reliability.

[0026] 3. Through reasonable structural design and BMS power management system, the safety risks of battery packs during storage or use are effectively reduced. This includes monitoring and protecting the battery from overcharge, over discharge, short circuit, etc., ensuring the safe operation of the battery pack and reducing the possibility of accidents such as fire and explosion. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a front structural schematic diagram of an embodiment of the utility model;

[0028] Figure 2 This is a side structural schematic diagram of an embodiment of the utility model;

[0029] Figure 3 This is a schematic diagram of the structure of the box cover part of an embodiment of the utility model.

[0030] Illustration: flexible strip 1, protection plate 2, box body 3, box cover 4, discharge port 4.1, vibration head 4.2, battery cell unit 5, PCB board 6, battery cell bracket group 7, power management system unit 8, metal sheet 9. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme and advantages of the present disclosure clearer, the following will further describe the embodiments of the present disclosure in detail with reference to the accompanying drawings. The proportions of the components are not drawn according to the actual proportions, and the proportions and sizes shown in the accompanying drawings should not limit the substantial technical scheme of the present utility model. These embodiments do not describe all the details in detail, nor do they limit the present utility model to only the specific embodiments described.

[0032] See also Figure 1-3 As shown, a novel lithium-ion battery pack includes a box body 3, and also includes: a battery pack and a safety communication system are installed in the box body 3, the battery pack is composed of a plurality of battery cells 5 connected in series and in parallel, the battery cell units 5 are installed on a battery cell bracket group 7, the battery cell units 5 and the battery cell bracket group 7 are both modularly designed, and a box cover 4 is provided on the top of the box body 3.

[0033] The modular design simplifies the assembly process of the battery pack, allowing it to be quickly assembled into a standard lithium-ion battery pack. This not only reduces production time and cost, but also improves production efficiency and flexibility. The use of lithium-ion battery cells with high energy density and high power density gives the battery pack a longer service life and higher endurance. This means that users can use the device for longer without frequent charging, improving user experience and device reliability. Through reasonable structural design and BMS power management system, the safety risks of the battery pack during storage or use are effectively reduced. This includes monitoring and protecting the battery from overcharging, over-discharging, short circuit and other conditions to ensure the safe operation of the battery pack and reduce the possibility of accidents such as fire and explosion.

[0034] like Figure 1In one embodiment shown, it is a schematic diagram of the front structure of an embodiment of the utility model. The new lithium-ion battery pack designed by the utility model comprises a box body 3, in which a battery pack and a safety communication system are installed. The battery pack is composed of a plurality of battery cells 5 connected in series and in parallel, and these battery cells 5 are installed on a battery support group 7, and all adopt a modular design. There is a box cover 4 on the top of the box body 3. The safety communication system includes a power management system unit 8, a structural protection unit and a communication unit. The power management system unit 8 is installed between the top of the battery pack and the box cover 4, and the structural protection unit is composed of a plurality of protective plates 2 and a plurality of metal sheets 9. The protective plate 2 surrounds the battery pack and the battery support group 7, and the metal sheet 9 is located between the protective plate 2 and the battery support group 7, and is arranged in a parallelogram, and a PCB board is arranged between the metal sheet and the protective plate. This design helps to improve the safety and stability of the battery pack and makes the battery pack easier to maintain and manage. In this embodiment, a plurality of flexible strips 1 are installed between the outer side of the protection plate 2 and the inner side of the box body 3. The protection plate 2 is made of glass fiber board, the metal sheet 9 is made of aluminum sheet, and the flexible strip 1 is made of foam. In this embodiment, each battery cell unit 5 can be embedded in the designed groove between the battery cell bracket groups 7. Both the battery cell unit 5 and the battery cell bracket group 7 adopt a modular design, so that the number of battery cell units 5 and their matching battery cell bracket groups 7 can be increased or decreased according to demand. At the same time, the multiple aluminum sheets installed on the outer side of the battery cell bracket group 7 can assist in fixing each modular battery cell bracket, thereby increasing stability.

[0035] The advantages of using aluminum sheets in the design are: aluminum sheets have good thermal conductivity and can effectively conduct the heat generated by the battery to the external environment, thereby reducing the battery temperature. Since high temperature will reduce the performance and life of lithium batteries, the stability and reliability of the battery can be improved by adding aluminum sheets to improve the heat dissipation performance; aluminum sheets as supports can increase the structural stability between battery components and reduce the movement or vibration between the battery cells and the PCB board 6, which helps to reduce mechanical damage caused by vibration or violent movements, thereby improving the durability and reliability of the battery components; aluminum sheets form an isolation layer between the PCB board 6 and the battery cell bracket, which can prevent external metal or other conductive objects from accidentally contacting the battery, thereby reducing the risk of short circuits. In general, adding aluminum sheets can improve the heat dissipation performance and structural stability of lithium batteries, while reducing the risk of short circuits, thereby improving the safety, reliability and performance of batteries. The benefits of using fiberglass board as the protection board 2 are as follows: the fiberglass board has high strength and rigidity, and can effectively resist external impact and extrusion force, thereby protecting the battery pack and the battery cell unit 5 from damage; the fiberglass board has good corrosion resistance and can resist the erosion of chemical substances, thereby extending the service life of the protection system; the fiberglass board has good insulation performance, and can effectively isolate the battery pack and the battery cell unit 5 to prevent short circuits and other electrical problems; compared with metal materials, the fiberglass board has a lighter weight, which helps to reduce the weight of the entire battery pack without adding too much load; the fiberglass board can be cut, formed and processed relatively easily, and can be customized according to actual needs, which improves production efficiency and flexibility. Therefore, using fiberglass board as the protection board 2 can provide good mechanical properties, corrosion resistance, insulation properties and lightweight characteristics, and at the same time has high processing performance, which is suitable for the protection needs of application scenarios such as battery packs. The advantages of using foam in the flexible strip 1 are: foam has good softness and elasticity, can effectively absorb external shocks and vibrations, provide good buffering protection for the battery pack, and reduce the risk of mechanical damage; foam has good shock absorption performance, can effectively reduce the impact of vibration and noise on the battery pack, and improve the stability and comfort of use of the battery pack; foam, as an insulating material, can effectively isolate the contact between the battery pack and the external environment, prevent the battery pack from being damaged by external conditions, and improve the safety of the battery pack; foam has a certain sealing property, can fill the gaps around the battery pack, prevent external substances such as water vapor and dust from invading the interior of the battery pack, and protect the battery pack from pollution and corrosion; foam is easy to process and customize, and can be cut according to the shape and size of the battery pack to ensure good fit and protection effect, and improve the overall performance and reliability of the battery pack; therefore, using foam as the flexible strip 1 can provide multiple protections for the battery pack, including buffering, shockproof, insulation, waterproof and dustproof functions, effectively improving the safety and stability of the battery pack.

[0036] like Figure 2In one embodiment shown, it is a schematic diagram of the side structure of an embodiment of the utility model. A new type of lithium-ion battery pack includes a box 3, in which a battery pack and a safety communication system are installed. The battery pack is composed of a plurality of battery cells 5 connected in series and in parallel, and these battery cells 5 are installed on a battery cell bracket group 7, and they all adopt a modular design. There is a box cover 4 on the top of the box 3. The battery cell bracket group 7 includes a positive pole bracket and a negative pole bracket, the positive pole bracket is arranged on the positive end of the battery cell unit 5, and the negative pole bracket is arranged on the negative end of the battery cell unit 5. The safety communication system includes a power management system unit 8, a structural protection unit and a communication unit. The power management system unit 8 is located between the top of the battery pack and the box cover 4. The structural protection unit includes a plurality of protection plates 2 and a plurality of metal sheets 9. The protection plate 2 is located around the battery pack and the battery cell bracket group 7, and a metal sheet 9 is provided between the protection plate 2 and the battery cell bracket group 7. These metal sheets 9 are installed on the battery cell bracket group 7 and arranged in a parallelogram, and a PCB board is provided between the metal sheet and the protection plate. In addition, a plurality of flexible strips 1 are installed between the inner side of the box body 3 and the outer side of the protection plate 2 .

[0037] The utility model device adopts lithium-ion battery as power source, optimizes battery structure, adopts multiple battery cell units 5 series and parallel combination (23 series and 2 parallel), improves output voltage and current of battery pack, and can quickly assemble battery cell units 5 into power lithium-ion battery pack through independent battery cell bracket design. Improve the energy density and life of battery, and meet the energy requirements of various equipment at the same time. In terms of battery cell safety guarantee, BMS including over-temperature protection (temperature sensor), over-current protection, over-voltage protection (over-charge and over-discharge), short-circuit protection, current balancing, and software anti-ignition function is adopted to monitor various performances of battery pack in real time, monitor the temperature of battery pack in real time, and automatically cut off the power supply when the temperature is too high to prevent safety accidents caused by overheating of battery. Over-charge, over-discharge and over-voltage protection can monitor the current and voltage status of battery pack, and automatically cut off the power supply when the current or voltage is abnormal to protect the battery from damage. Metal cold-rolled steel plate is used to manufacture battery pack shell in product appearance and packaging.

[0038] The utility model device design proposes a new type of lithium-ion battery pack, which has many characteristics and advantages: first, the battery pack adopts a modular design, and the battery cell unit 5 and the battery cell bracket group 7 are both modularly designed, which makes the battery pack more flexible and easy to maintain. The modular design allows users to replace damaged parts more easily, thereby reducing maintenance costs and extending the service life of the entire battery pack. Secondly, the internal structure of the battery pack is reasonably designed, and the battery cell bracket group 7 includes a positive pole bracket and a negative pole bracket, which helps to ensure the stable installation of the battery cell unit 5, while providing a good electrical connection, which is conducive to improving the overall performance and safety of the battery pack. In addition, the setting of the safety communication system is also a highlight of the design. The combination of the power management system unit 8, the structural protection unit and the communication unit can effectively monitor and manage the working state of the battery pack, and improve the safety and stability of the battery pack. The existence of the structural protection unit can provide all-round protection for the battery pack, including preventing the occurrence of abnormal conditions such as overcharging, over-discharging, and over-temperature, thereby reducing safety risks and ensuring the safety of users. Finally, a number of flexible strips 1 are installed between the outer side of the protection plate 2 and the inner side of the box 3, which can not only reduce the impact of vibration on the battery pack, but also prevent damage to the battery pack by external factors, thereby improving the anti-seismic ability and durability of the battery pack. Therefore, this design fully considers the safety, stability and reliability of the battery pack through a variety of innovative designs and reasonable layouts, and provides a new solution for the application of lithium-ion battery packs, which has broad market prospects and application potential.

[0039] like Figure 3 In one embodiment shown, it is a schematic diagram of the partial structure of the box cover 4 of an embodiment of the utility model. A new type of lithium-ion battery pack, including a box body 3, also includes: a battery pack and a safety communication system are installed in the box body 3, the battery pack is composed of a plurality of battery cells 5 connected in series and in parallel, the battery cell 5 is installed on a battery cell bracket group 7, the battery cell 5 and the battery cell bracket group 7 are both modularly designed, and a box cover 4 is provided on the top of the box body 3. The box cover 4 is provided with a discharge port 4.1 and a vibration head 4.2, and the vibration head 4.2 is connected to each of the battery cells 5 through the communication unit. Through the external communication line serial port, a one-line solution is adopted to connect each battery cell 5, so that the internal data of the battery cell can be read, the performance of the battery cell 5 can be quickly identified, and the replacement and maintenance of the battery cell 5 can be conveniently performed.

[0040] In summary, the utility model provides a new type of lithium-ion battery pack, which has the advantages of simple assembly, long life, high endurance, high safety and convenient maintenance. The utility model is suitable for electric motorcycles, electric tricycles, special vehicles and other fields.

[0041] The present invention is not limited to the above-mentioned embodiments. Regardless of any changes in shape or material composition, any structural design provided by the present invention is a variation of the present invention and should be considered within the protection scope of the present invention.

Claims

1. A novel lithium-ion battery pack, comprising a box (3), characterized in that: Also includes: A battery pack and a safety communication system are installed in the box (3); the battery pack is composed of a plurality of battery cells (5) connected in series and in parallel; the battery cells (5) are installed on a battery support group (7); the battery cells (5) and the battery support group (7) are both modularly designed; and a box cover (4) is provided on the top of the box (3).

2. A novel lithium-ion battery pack according to claim 1, characterized in that: The battery cell support group (7) comprises a positive electrode support and a negative electrode support, the positive electrode support is arranged on the positive end of the battery cell unit (5), and the negative electrode support is arranged on the negative end of the battery cell unit (5).

3. A novel lithium-ion battery pack according to claim 1 or 2, characterized in that: The safety communication system comprises a power management system unit (8), a structural protection unit and a communication unit. The power management system unit (8) is arranged between the top of the battery pack and the box cover (4). The structural protection unit comprises a plurality of protection plates (2) and a plurality of metal sheets (9).

4. A novel lithium-ion battery pack according to claim 3, characterized in that: The protection plate (2) is located around the battery pack and the battery support group (7); the metal sheet (9) is provided between the protection plate (2) and the battery support group (7); the metal sheet (9) is mounted on the battery support group (7); the metal sheet (9) is in the shape of a parallelogram; and a PCB board (6) is provided between the metal sheet (9) and the protection plate (2).

5. A novel lithium-ion battery pack according to claim 3, characterized in that: The box cover (4) is provided with a discharge port (4.1) and a vibration head (4.2), and the vibration head (4.2) is connected to each of the battery core units (5) via the communication unit.

6. A novel lithium-ion battery pack according to claim 4, characterized in that: A plurality of flexible strips (1) are installed between the outer side of the protection plate (2) and the inner side of the box body (3).

7. A novel lithium-ion battery pack according to claim 4 or 6, characterized in that: The protection plate (2) is made of a glass fiber plate.

8. A novel lithium-ion battery pack according to claim 4 or 6, characterized in that: The metal sheet (9) is an aluminum sheet.

9. A novel lithium-ion battery pack according to claim 6, characterized in that: The flexible strip (1) is made of foam.

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