Battery cell structure and battery

Abstract

The utility model discloses a battery cell structure and a battery, and relates to the technical field of batteries. The battery cell structure comprises a naked battery cell, a battery cell cover plate, a battery management unit and a sensor assembly, the battery management unit comprises a wireless transmitting and receiving device; the battery management unit and the sensor assembly are arranged on the internal surface of the battery cell cover plate, and the internal surface is the surface, close to one side of the naked battery cell, of the battery cell cover plate; the sensor assembly is used for acquiring cell information of the bare cell; the battery management unit is used for acquiring cell information from the sensor assembly; and through the wireless transmitting and receiving device, the cell information is wirelessly communicated with the outside through the cell cover plate. Therefore, the battery cell information is monitored in real time, and the battery cell information is sent to the outside in a wireless communication mode, so that related technicians can timely and accurately find the abnormal condition of the battery based on the battery cell information.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery core structure and a battery. Background Art

[0002] With the rapid development of electric vehicles, wearable devices, and the Internet of Things, the safety of batteries, as important energy storage and supply units, has received increasing attention from the industry. The battery shell and cell structure of traditional batteries are mostly made of metal materials such as aluminum alloys, which have excellent mechanical strength and conductivity, meeting the basic needs of batteries in daily use.

[0003] However, as intelligence becomes increasingly prevalent, the defects of traditional batteries are gradually becoming apparent. At present, in order to obtain battery cell information, we have to rely on the battery management system (BMS) outside the battery. This method not only limits the amount of battery cell information that can be obtained, resulting in very limited battery cell information that relevant technicians can understand, but also greatly reduces the real-time nature of battery cell information. Due to the inability to grasp battery cell information in real time and comprehensively, intelligent battery management becomes difficult to achieve, which sows the seeds of safety hazards. Utility Model Content

[0004] Based on the above problems, the utility model provides a battery cell structure and a battery, which can enable relevant technical personnel to timely and accurately discover abnormal conditions of the battery based on the battery cell information.

[0005] The utility model embodiment discloses the following technical solution:

[0006] In the first aspect, the utility model discloses a battery cell structure, which comprises: a bare battery cell, a battery cell cover, a battery management unit and a sensor assembly; the battery management unit comprises a wireless transmitting and receiving device; the battery management unit and the sensor assembly are arranged on the inner surface of the battery cell cover, and the inner surface is the surface of the battery cell cover close to the bare battery cell;

[0007] The sensor component is used to obtain the cell information of the bare cell;

[0008] The battery management unit is used to obtain the battery cell information from the sensor assembly; and wirelessly transmit the battery cell information to the outside world through the battery cell cover plate via the wireless transmitting and receiving device.

[0009] Optionally, the cell cover plate is made of epoxy material and plastic material.

[0010] Optionally, the cell cover plate is made of epoxy material or plastic material.

[0011] Optionally, a dense material layer is provided on the outer surface of the battery cell cover plate.

[0012] Optionally, a dense material layer is provided on the surface of the battery management unit.

[0013] Optionally, the dense material layer is one or more of a ceramic material layer, an alloy material layer and a high molecular polymer layer.

[0014] In a second aspect, an embodiment of the utility model provides a battery, comprising: a battery case, positive and negative battery tabs, positive and negative battery electrodes, and a battery cell structure as described in the first aspect.

[0015] Optionally, the battery casing and the battery core structure are bonded and fixed by epoxy glue.

[0016] Optionally, the battery further includes: a metal reinforcement component; the metal reinforcement component is located at the connection between the battery shell and the battery cell structure; the battery cell structure and the metal reinforcement component are bonded and fixed by epoxy glue, and the metal reinforcement component and the battery shell are connected and fixed by welding.

[0017] Optionally, the battery management unit and the sensor assembly are welded on a circuit layout, and the circuit layout is located on the inner surface of the battery cover;

[0018] The positive and negative battery electrodes are used to supply power to the circuit board.

[0019] Optionally, the battery casing is made of epoxy material and plastic material.

[0020] Optionally, the battery housing is made of epoxy material or plastic material.

[0021] Compared with the prior art, the utility model has the following beneficial effects:

[0022] The utility model discloses a cell structure and a battery, the cell structure includes: a bare cell, a cell cover, a battery management unit and a sensor assembly; the battery management unit includes a wireless transmitting and receiving device; the battery management unit and the sensor assembly are arranged on the inner surface of the cell cover, and the inner surface is the surface of the cell cover close to the bare cell; the sensor assembly is used to obtain the cell information of the bare cell; the battery management unit is used to obtain the cell information from the sensor assembly; the cell information is wirelessly transmitted to the outside through the cell cover by the wireless transmitting and receiving device. Thus, the cell information is monitored in real time, and the cell information is sent to the outside through wireless communication, so that relevant technicians can timely and accurately find abnormal conditions of the battery based on the cell information. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0024] Figure 1 A schematic diagram of a battery core structure provided by the utility model;

[0025] Figure 2 A schematic diagram of a first battery provided by the utility model;

[0026] Figure 3 A bottom view of a first battery provided by the utility model;

[0027] Figure 4 A schematic diagram of a second battery provided by the utility model;

[0028] Figure 5 A schematic diagram of a third battery provided by the utility model;

[0029] Figure 6 A schematic diagram of a fourth battery provided by the utility model;

[0030] Figure 7 A bottom view of a fourth battery provided by the utility model;

[0031] Figure 8 A schematic diagram of a fifth battery provided by the utility model;

[0032] Fig. 9 A schematic diagram of obtaining battery cell information provided by the utility model;

[0033] Fig.10 This is a schematic diagram of a sixth battery provided by the utility model. DETAILED DESCRIPTION

[0034] With the rapid development of electric vehicles, wearable devices, and the Internet of Things, the safety of batteries, as key energy storage and supply components, has gradually become a focus of attention in the industry. The battery shell and cell structure of traditional batteries are mainly made of metal materials such as aluminum alloys. These materials have excellent mechanical strength and conductivity, which are sufficient to meet the basic needs of daily battery use.

[0035] However, we currently rely mainly on external battery management systems (BMS) to obtain battery cell information. This approach not only limits the amount of cell information that can be obtained, making the cell information that technicians can obtain very limited, but also greatly reduces the real-time nature of the cell information. Since it is impossible to fully and comprehensively grasp the detailed data of the cell in real time, it becomes extremely difficult to achieve intelligent management of the battery, thereby increasing potential safety risks.

[0036] In view of this, the utility model discloses a cell structure and a battery, the cell structure includes: a bare cell, a cell cover, a battery management unit and a sensor assembly; the battery management unit includes a wireless transmitter and receiver; the battery management unit and the sensor assembly are arranged on the inner surface of the cell cover, and the inner surface is the surface of the cell cover close to the bare cell; the sensor assembly is used to obtain the cell information of the bare cell; the battery management unit is used to obtain the cell information from the sensor assembly; the cell information is wirelessly communicated with the outside world through the cell cover through the wireless transmitter and receiver. Thus, the cell information is monitored in real time, and the cell information is sent to the outside world through wireless communication, so that relevant technicians can timely and accurately discover abnormal conditions of the battery based on the cell information.

[0037] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0038] See also Figure 1 , which is a schematic diagram of a battery core structure provided by the utility model. Figure 1 It can be seen that the battery cell structure 100 includes a battery cell cover 101 , a battery management unit (BMU) 102 , a sensor assembly 103 and a bare battery cell 104 .

[0039] The main function of the sensor assembly 103 is to obtain the cell information of the bare cell in real time. The cell information includes but is not limited to voltage information, current information, and temperature information, which are crucial for evaluating the cell status, predicting potential failures, and optimizing battery performance.

[0040] The battery management unit 102 is responsible for receiving the battery cell information from the sensor assembly 103. In addition, the wireless transmitting and receiving device integrated in the battery management unit 102 can transmit the battery cell information to the outside world wirelessly. This wireless communication method not only improves the convenience of battery cell information transmission, but also avoids the interference and safety hazards that may be caused by wired connection.

[0041] As the main structure of the battery cell structure 100, the battery cell cover 101 must not only have sufficient mechanical strength to protect the internal battery components, but also have specific physical and chemical properties to adapt to the working environment of the battery. In the battery cell structure 100 disclosed in the utility model, the design of the battery cell cover 101 also takes into account the needs of wireless communication. Since the battery management unit 102 needs to transmit the battery cell information wirelessly through the battery cell cover 101, in order to ensure that the wireless signal can penetrate smoothly, the battery cell cover 101 adopts epoxy materials and / or plastic materials and other polymer materials that can transmit radio waves. The choice of this material not only ensures the stability of the structure, but also meets the needs of wireless communication. The utility model does not limit the specific material of the battery cover.

[0042] In summary, the utility model discloses a battery structure, which includes: a bare battery, a battery cover, a battery management unit and a sensor assembly; the battery management unit includes a wireless transmitter and receiver; the battery management unit and the sensor assembly are arranged on the inner surface of the battery cover, and the inner surface is the surface of the battery cover close to the bare battery; the sensor assembly is used to obtain the battery information of the bare battery; the battery management unit is used to obtain the battery information from the sensor assembly; and the battery information is wirelessly communicated with the outside world through the battery cover through the wireless transmitter and receiver. Thus, by real-time monitoring of the battery information, technicians can obtain changes in battery voltage, current, temperature and other battery information. These battery information can not only help determine the health status of the battery, but also predict possible problems with the battery. Once an abnormal situation is found, such as excessive voltage, abnormal current or abnormal temperature, the technician can immediately take corresponding measures, such as adjusting the workload, stopping charging or discharging, etc., to avoid safety accidents such as overheating and short circuit of the battery. This not only improves the intelligence level of the battery, but also provides strong support for the safe use and performance optimization of the battery.

[0043] See also Figure 2 , which is a schematic diagram of the first battery provided by the utility model. Figure 2 It can be seen that the battery includes a battery housing 1, an internal cavity 2 of the battery housing 1, a positive battery tab 7, a negative battery tab 9, a positive battery electrode 8, a negative battery electrode 10 and a battery cell structure. The battery cell structure further includes a bare battery cell 3, a battery cell cover 6, a battery management unit 4 and a sensor assembly 5.

[0044] Among them, the battery shell 1 serves as the outer protection structure of the battery, providing the battery with the necessary mechanical strength and protection performance. The internal cavity 2 of the battery is the space for accommodating the bare battery cell 3, ensuring the safety and stability of the bare battery cell 3 inside the battery. The bare battery cell 3 is the core part of the battery, responsible for storing and releasing electrical energy. The positive battery tab 7 and the negative battery tab 9 are respectively connected to the positive and negative poles of the bare battery cell 3, and are the key channels for electrical energy transmission. The positive battery electrode 8 and the negative battery electrode 10 are responsible for connecting with the external circuit to realize the input and output of electrical energy.

[0045] It should be noted that, in order to make it easier for the sensor assembly 5 to obtain the cell information of the bare cell 3, the battery management unit 4 and the sensor assembly 5 can be arranged on the inner surface of the cell cover 6, that is, on the surface between the cell cover 6 and the bare cell 3. In addition, placing the battery management unit 4 and the sensor assembly 5 on the inner surface of the cell cover 6 also helps to improve the safety of the battery. Since the battery management unit 4 and the sensor assembly 5 are encapsulated inside the battery, they are less affected by the external environment, so the potential failure points inside the battery can be reduced, reducing the risk of safety accidents of the battery.

[0046] It should be noted that the sealing of the cell structure is a crucial factor in battery design. The sealing of the cell structure is directly related to the safety and stability of the battery. In order to ensure the sealing of the cell structure, the utility model has made careful layout and consideration on the cell structure:

[0047] First, through holes are provided at the positive battery tab 7 and the negative battery tab 9 on the cell structure. These through holes are necessary because they allow the positive battery tab 7 and the negative battery tab 9 to connect with the positive and negative electrodes of the bare cell 3, thereby ensuring the normal operation of the battery. However, the design and manufacture of these through holes are strictly controlled to ensure that their size and position can meet the requirements of sealing.

[0048] Then, except for the through holes at the positive battery tab 7 and the negative battery tab 9, no additional through holes are set at other positions of the battery structure. This design decision is based on comprehensive consideration of the battery's sealing. By reducing unnecessary through holes, the risk of leakage of internal battery substances or entry of external substances due to the pores of the through holes can be greatly reduced, thereby ensuring the safety of the battery.

[0049] See also Figure 3 , which is a bottom view of the first battery provided by the utility model. Figure 3It can be seen that the battery management unit 4 and the sensor assembly 5 are welded on the circuit layout, and the circuit layout is located on the inner surface of the battery cover 6. This design makes the connection between the various components more firm and stable, which is conducive to the transmission of battery cell information and data processing. In addition, the positive battery electrode 8 and the negative battery electrode 10 can be used to power the circuit layout, thereby ensuring that the battery management unit 4 and the sensor assembly 5 can work normally.

[0050] See also Figure 4 , which is a schematic diagram of the second battery provided by the utility model. In order to improve the ability of the battery structure to resist the intrusion of impurities such as water vapor and dust into the battery cell, thereby enhancing the overall safety and stability of the battery, a dense material layer 11 can also be provided on the outer surface of the battery cover plate 6.

[0051] Specifically, the dense material layer 11 can be made of a variety of materials, including but not limited to a ceramic material layer, an alloy material layer, and a high molecular polymer layer. These materials have excellent sealing and protective properties, and can effectively prevent external impurities from invading the interior of the battery cell. At the same time, these materials also have good mechanical strength and wear resistance, and can protect the battery cell structure from external physical damage.

[0052] See also Figure 5 , which is a schematic diagram of the third battery provided by the utility model. In some specific implementations, a dense layer material can also be used at the battery management unit 4 to seal the battery management unit 4, that is, to form a sealing layer 12.

[0053] On the one hand, the sealing layer 12 can effectively isolate the battery management unit 4 from the electrolyte in the battery cell. The electrolyte is an important component of the battery, but it is also corrosive. Without proper isolation measures, the electrolyte may corrode the sensitive components in the battery management unit 4, resulting in failure of the battery management unit 4. By sealing the battery management unit 4 with dense material layers such as ceramic material layers, alloy material layers and polymer layers, the safe operation of the battery management unit 4 can be ensured and the service life of the battery management unit 4 can be extended.

[0054] On the other hand, the sealing layer 12 also reduces the risk of electrolyte contamination by sensitive components in the battery management unit 4. If the electrolyte is contaminated, it may also affect the overall performance of the battery and even cause safety hazards.

[0055] Therefore, by sealing and isolating the battery management unit 4 , direct contact between sensitive components of the battery management unit 4 and the electrolyte can be avoided, thereby keeping the battery management unit 4 clean and stable.

[0056] It should be noted that, since the cell cover plate 6 and the battery housing 1 are made of different materials, epoxy glue or other materials may be used to bond and fix the cell cover plate 6 and the battery housing 1 .

[0057] However, although this connection method can meet the basic fixing requirements of the battery cover plate 6 and the battery shell 1, under certain special working environments, such as high temperature, high humidity or strong vibration conditions, the connection between the battery cover plate 6 and the battery shell 1 may still become loose or even fall off.

[0058] In order to solve the above problems and improve the connection strength between the cell cover plate 6 and the battery housing 1, in other specific implementations, a metal reinforcement component 13 may be further provided in the battery.

[0059] See also Figure 6 , which is a schematic diagram of the fourth battery provided by the utility model. Figure 7 , which is a bottom view of the fourth battery provided by the utility model. The metal reinforcement component 13 is located at the connection between the battery shell 1 and the battery cover plate 6. The battery cover plate 6 and the metal reinforcement component 13 can be bonded and fixed by epoxy glue to ensure a tight connection between the two. The metal reinforcement component 13 and the battery shell 1 are connected and fixed by welding. Welding is a high-strength connection method, which melts the contact part of the metal reinforcement component 13 and the battery shell 1 to fuse the metal reinforcement component 13 and the battery shell 1 together, thereby effectively preventing the connection from loosening or falling off.

[0060] In addition, the arrangement of the metal reinforcement component 13 also takes into account the safety performance of the battery. When the battery is subjected to external impact or extrusion, the metal reinforcement component 13 can effectively disperse and withstand the impact force, reducing damage to the interior of the battery.

[0061] See also Figure 8 , which is a schematic diagram of the fifth battery provided by the utility model. Figure 8 Compared to Figure 6 , the area of ​​the metal reinforcement component 13 is larger, which means that the metal reinforcement component 13 can provide stronger structural support and connection stability. The large-area metal reinforcement component 13 can more effectively disperse and withstand various stresses from inside and outside the battery, thereby improving the overall vibration resistance and durability of the battery.

[0062] It should be noted that, although the area of ​​the metal reinforcement component 13 is increased, a position for transparently transmitting radio signals is still reserved at the battery management unit 4. This design detail ensures that the battery management unit 4 can perform wireless communication normally without being interfered with or shielded by the metal reinforcement component 13. Therefore, such a layout not only ensures the structural strength of the battery, but also takes into account the communication function of the battery management unit 4.

[0063] See also Fig. 9 , which is a schematic diagram of obtaining battery cell information provided by the utility model. Through the battery cell structure and / or battery provided by the utility model, the battery management unit 4 can transmit the battery cell information (such as voltage information, temperature information, power information, etc.) to the battery management system located outside the battery in real time, so as to accurately evaluate the battery status.

[0064] Among them, the external battery management system (BMS) is a system dedicated to monitoring and managing the battery status. It communicates with the battery management unit 4 (BMU) inside the battery to obtain real-time battery cell information such as voltage, current, temperature, power, etc., so as to achieve accurate evaluation of the battery status.

[0065] In addition, wireless communication also avoids many inconveniences and potential risks that may be caused by wired connections. For example, wired connections may be affected by mechanical vibrations, temperature changes, etc., causing the connection to become loose or damaged, thereby affecting the transmission of battery cell information. Wireless communication, on the other hand, has higher flexibility and stability and can adapt to various complex working environments.

[0066] See also Fig.10 , which is a schematic diagram of the sixth battery provided by the utility model. In some specific implementations, the material of the battery housing 1 can be set to a polymer material that can transmit radio waves, such as epoxy material and / or plastic material. Since the battery housing 1 adopts a polymer material that can transmit radio waves, no matter where the battery management unit 4 and the sensor assembly 5 are placed in the battery housing 1, it can ensure that the battery cell information can be smoothly transmitted to the outside world. The flexibility of this design makes the internal layout of the battery more optimized.

[0067] In addition, the use of epoxy material and / or plastic material as the battery housing 1 also has certain mechanical strength and protective performance. The epoxy material and / or plastic material can effectively protect the electronic components inside the battery from the influence of the external environment, so that the battery can adapt to various harsh working environments.

[0068] In summary, the utility model discloses a battery, which can monitor the battery cell information in real time, so that technicians can obtain the changes in battery cell information such as battery voltage, current, temperature, etc. These battery cell information can not only help determine the health status of the battery, but also predict possible problems with the battery. Once an abnormal situation is found, such as excessive voltage, abnormal current or abnormal temperature, the technician can immediately take corresponding measures, such as adjusting the workload, stopping charging or discharging, etc., to avoid safety accidents such as overheating and short circuit of the battery. In addition, by sending and / or receiving key information through the battery disclosed in the utility model, the battery's ability to resist the intrusion of impurities such as water vapor and dust into the battery can also be improved. This is because the battery disclosed in the utility model reduces the need for physical interfaces, through holes, and connecting wires, reducing the risk of external impurities entering the battery through the interface. At the same time, the battery design disclosed in the utility model also uses materials and structures with better sealing properties, further enhancing the overall safety and stability of the battery.

[0069] It should be understood that in the present utility model, "at least one (item)" means one or more, and "plurality" means two or more. "And / or" is used to describe the association relationship of associated objects, indicating that three relationships may exist. For example, "A and / or B" can mean: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following items" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c can be single or multiple.

[0070] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Although the utility model has been disclosed as a preferred embodiment as above, it is not used to limit the utility model. Any technician familiar with the field can make many possible changes and modifications to the technical solution of the utility model by using the technical content disclosed above without departing from the scope of the technical solution of the utility model, or modify it into an equivalent embodiment of equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the utility model without departing from the content of the technical solution of the utility model still falls within the scope of protection of the technical solution of the utility model.

Claims

1. A battery cell structure, characterized in that: The cell structure comprises a bare cell, a cell cover, a battery management unit and a sensor assembly; the battery management unit comprises a wireless transmitting and receiving device; the battery management unit and the sensor assembly are arranged on the inner surface of the cell cover, and the inner surface is the surface of the cell cover close to the bare cell; The sensor component is used to obtain the cell information of the bare cell; The battery management unit is used to obtain the battery cell information from the sensor assembly; and wirelessly transmit the battery cell information to the outside world through the battery cell cover plate via the wireless transmitting and receiving device.

2. The battery cell structure according to claim 1, characterized in that: The material of the battery cover plate is epoxy material and plastic material.

3. The battery cell structure according to claim 1, characterized in that: The material of the battery cover plate is epoxy material or plastic material.

4. The battery cell structure according to claim 1, characterized in that: A dense material layer is arranged on the outer surface of the battery cell cover plate.

5. The battery cell structure according to claim 1, characterized in that: A dense material layer is arranged on the surface of the battery management unit.

6. The battery core structure according to claim 4 or 5, characterized in that: The dense material layer is one or more of a ceramic material layer, an alloy material layer and a high molecular polymer layer.

7. A battery, characterized in that: The battery comprises: a battery casing, positive and negative battery tabs, positive and negative battery electrodes, and a battery cell structure as claimed in any one of claims 1 to 6.

8. The battery according to claim 7, characterized in that The battery shell and the battery core structure are bonded and fixed by epoxy glue.

9. The battery according to claim 8, characterized in that The battery also includes: a metal reinforcement component; the metal reinforcement component is located at the connection between the battery shell and the battery cell structure; the battery cell structure and the metal reinforcement component are bonded and fixed by epoxy glue, and the metal reinforcement component is connected and fixed to the battery shell by welding.

10. The battery according to claim 7, characterized in that The battery management unit and the sensor assembly are welded on a circuit layout, and the circuit layout is located on the inner surface of the battery cover; The positive and negative battery electrodes are used to supply power to the circuit board.

11. The battery according to claim 7, characterized in that The battery casing is made of epoxy material and plastic material.

12. The battery according to claim 7, characterized in that The material of the battery housing is epoxy material or plastic material.

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