Intelligent battery cell

Abstract

The utility model relates to the technical field of battery cells, and discloses an intelligent battery cell which comprises a shell, and the shell at least comprises two accommodating cavities for accommodating a cell stack and an elastic cavity arranged between two adjacent accommodating cavities; the detection assembly is arranged on the inner wall surface of the elastic cavity; the elastic cavity enables the shell to absorb impact and vibration, protect the core pile from being interfered by the external environment, prolong the service life of the battery and bring a deformation signal of the core pile to the strain gauge through deformation, the detection assembly is arranged in the elastic cavity, the temperature and deformation quantity of the battery can be monitored more accurately in real time, and the detection accuracy is improved. Detection data can be conveniently transmitted to an external system for checking through the wire harness, abnormity or hidden danger of the battery can be found in time, the detection assembly and the core pile are stored in different chambers to avoid direct contact, damage of the detection assembly to the core pile is effectively prevented, and the safety performance of the battery is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery cores, in particular to an intelligent battery core. Background Art

[0002] In modern manufacturing, power batteries are widely used in electric vehicles and hybrid vehicles, becoming a clean energy solution to replace traditional fuel power sources. With the popularization of electric vehicles, the performance and safety requirements of power batteries are also increasing. During the operation of power batteries, their internal temperature has an important impact on their performance and life. High temperature will accelerate the aging and loss of the battery, reduce its cycle life, and even cause safety hazards; while too low temperature will affect the discharge performance of the battery, reduce energy density and power density, so during the operation of power batteries, their temperature is generally monitored, and through relevant regulation, their internal temperature is balanced to avoid excessive temperature or excessive temperature difference, so that they can work in the optimal operating temperature range. Monitoring the temperature of power batteries is mainly carried out by temperature sensors. The change of battery temperature can identify whether it is overloaded or has an electrical fault. When abnormal temperature occurs, the current intensity must be reduced immediately or the high voltage system must be completely shut down to prevent further damage to the battery. In addition, the measured temperature is also used to control the cooling system to ensure that the battery always operates within the temperature range that is most conducive to its own power and service life.

[0003] The temperature sensors and strain gauges inside the existing battery cells are directly connected to the positive electrode film and the negative electrode film, and the production process is too complicated. At the same time, the temperature sensors and strain gauges are easy to damage the positive electrode film and the negative electrode film during actual application, causing safety hazards, so the overall safety performance of the existing battery pack is poor.

[0004] Therefore, it is necessary to provide a new type of smart battery cell to solve the above problems. Utility Model Content

[0005] The utility model aims to provide an intelligent battery cell to solve the technical problem in the prior art that temperature sensors and strain gauges are prone to damage to the core stack.

[0006] The utility model adopts the following technical solutions:

[0007] A smart battery cell, comprising:

[0008] A shell, the shell comprising at least two accommodating chambers for accommodating the core stack, and an elastic chamber arranged between two adjacent accommodating chambers;

[0009] A detection component, wherein the detection component is arranged on the inner wall surface of the elastic chamber;

[0010] Furthermore, the detection component includes a temperature probe.

[0011] Furthermore, the detection component includes a strain gauge.

[0012] Furthermore, the shell includes a first opening and a second opening that are arranged opposite to each other, the first opening is covered by a first top cover, and the second opening is covered by a second top cover.

[0013] Furthermore, it also includes an air pressure sensor, the first top cover is provided with a first through hole, the air pressure sensor is penetrated through the first through hole and is sealed and fixedly connected to the first top cover.

[0014] Furthermore, it also includes a wiring harness, and the first top cover is also provided with a second through hole, and the wiring harness is passed through the second through hole, wherein the wiring harness is electrically connected to the detection component to transmit the detection data of the detection component.

[0015] Further, the wiring harness is sealed and connected to the first top cover.

[0016] Furthermore, the first top cover and the second top cover are respectively provided with a make way groove for avoiding the elastic chamber.

[0017] Furthermore, an elastic buffer structure is arranged in the elastic chamber.

[0018] Furthermore, the detection component and the elastic buffer structure are staggered with each other.

[0019] Beneficial effects:

[0020] The utility model provides an intelligent battery cell, in which a shell is arranged to include at least two accommodating chambers for accommodating a core stack and an elastic chamber arranged between the two adjacent accommodating chambers, which not only provides a suitable accommodating space, but also enables the battery shell to absorb external impact and vibration through the design of the elastic chamber, protect the core stack from interference from the external environment, and extend the service life of the battery, and bring a deformation signal of the core stack to the strain gauge through deformation. By arranging a detection component inside the accommodating chamber, the temperature and deformation parameters of the battery can be monitored in real time and more accurately, and the detection data can be conveniently transmitted to an external system for viewing through a wiring harness, so as to timely discover abnormal battery operation or safety hazards, and the detection component and the core stack are stored in different chambers to avoid direct contact, effectively preventing the detection component from damaging the core stack, and further improving the safety performance of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of an embodiment of a smart battery cell of the utility model;

[0022] Figure 2 This is a schematic diagram of the explosion structure of a smart battery cell in this application;

[0023] Figure 3 This is a cross-sectional schematic diagram of a smart battery cell of the present invention;

[0024] Figure 4 This is a structural schematic diagram of a first top cover of a smart battery cell according to the present invention;

[0025] Figure 5 This is a schematic diagram of the shell structure of a smart battery cell in the present invention;

[0026] Figure 6 This is a schematic diagram of the structure of an air pressure sensor of a smart battery cell in the present invention;

[0027] Figure 7 This is a schematic diagram of the structure of a temperature probe for a smart battery cell in this application;

[0028] Figure 8 The present invention is a schematic diagram of the structure of a strain gauge of a smart battery cell.

[0029] Among them: 1. Shell; 11. Accommodating chamber; 12. Elastic chamber; 2. Detection component; 21. Temperature probe; 22. Strain gauge; 3. Air pressure sensor; 4. First top cover; 5. Second top cover; 6. First through hole; 7. Second through hole; 8. Wiring harness; 9. Elastic buffer structure; 10. Give way groove; 100. Core stack.

[0030] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0031] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0032] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "several" is two or more, unless otherwise clearly and specifically defined.

[0033] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0034] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0035] Reference Figures 1 to 8 The utility model proposes an intelligent battery cell, comprising: a shell 1, the shell 1 includes at least two accommodating chambers 11 for accommodating a core stack 100, and an elastic chamber 12 arranged between two adjacent accommodating chambers 11; a detection component 2, the detection component 2 is arranged on the inner wall surface of the elastic chamber 12.

[0036] In the above embodiment, the interior of the shell 1 is divided into at least two accommodating chambers 11, and an elastic chamber 12 arranged between two adjacent accommodating chambers 11. The accommodating chambers 11 and the elastic chamber 12 can be expanded in number according to the aforementioned quantity setting rule. The accommodating chamber 11 is used to place the core stack 100, so the space of the accommodating chamber 11 is larger than that of the elastic chamber 12. The elastic chamber 12 is located between the two accommodating chambers 11 and has certain elasticity and deformation capabilities. When the core stack 100 is subjected to external impact, the elastic chamber 12 can absorb and alleviate the impact force by deformation, thereby reducing the impact on the core stack 100. At the same time, the elastic chamber 12 can also play a buffering and balancing role when the internal pressure of the battery changes, ensuring the stable state inside the battery. For example, during the process of charging and discharging the battery, the electrochemical reaction will cause gas to be generated in the electrolyte, thereby increasing the pressure inside the battery, the gas pressure change caused by temperature changes, and the volume expansion of the core stack 100 itself. The shell 1 can be set to an opening corresponding to the accommodating chamber 11 and the elastic chamber 12 in the normal direction of the large surface. The opening is connected to the accommodating chamber 11 and the elastic chamber 12. This opening can be used to conveniently place the core stack 100, and when the core stack 100 needs to be replaced, it can be quickly taken out. For a single-head outlet The sub-battery can be set as one opening, and for the double-end terminal battery, it needs to be set as two openings. This is not limited here and can be further considered according to production needs; the detection component 2 is set on the two inner wall surfaces of the elastic chamber 12, and the two inner wall surfaces of the elastic chamber 12 correspond to the two adjacent accommodating chambers 11. The detection component 2 can monitor the working state of the finished battery in real time by monitoring the temperature, deformation and other parameters inside the battery, and can also provide data transmission by connecting to the outside. If the battery temperature is too high and the deformation in the cavity is abnormal, the detection component 2 can provide timely feedback and can be set to send an alarm signal to remind the user to pay attention to the safe use of the battery; through the structural design of the elastic chamber 12 and the built-in detection component 2, real-time monitoring and protection of the battery state can be achieved, and the safety and reliability of the battery can be improved. In addition, the detection component 2 and the core stack 100 are stored in different chambers to avoid direct contact, effectively preventing the detection component 2 from causing damage to the core stack 100, and further improving the safety performance of the battery.

[0037] In one embodiment, the detection component 2 may include only the temperature probe 21 , or only the strain gauge 22 , or may include both the temperature probe 21 and the strain gauge 22 .

[0038] In the above embodiment, the temperature probe 21 is used to detect the temperature of the core stack 100 in the accommodating chamber 11, and the strain gauge 22 is used to detect the deformation amount caused by the core stack 100 in the accommodating chamber 11 to the elastic chamber 12. According to the actual battery pack monitoring strategy, the temperature probe 21 and the strain gauge 22 can be all set, or only one of them can be set, that is, the temperature probe 21 or the strain gauge 22 is set separately, and the specific number of settings is uncertain, which is further considered according to the monitoring strategy; when the detection component 2 only includes the temperature probe 21, the detection component 2 only detects the temperature of the core stack 100 in the accommodating chamber 11; when the detection component 2 only includes the strain gauge 22, the detection component 2 only detects the deformation amount caused by the core stack 100 to the elastic chamber 12; when the detection component 2 includes both the temperature probe 21 and the strain gauge 22, the detection component 2 simultaneously detects the temperature of the core stack 100 and the stress condition of the elastic chamber 12; the temperature The probe 21 and the strain gauge 22 are arranged on the two inner wall surfaces of the elastic chamber 12. This arrangement ensures that the temperature probe 21 and the strain gauge 22 will not directly contact the core stack 100 in the containing chamber 11, thereby avoiding the temperature probe 21 and the strain gauge 22 from causing damage to the core stack 100 and causing safety hazards. It should be noted that the strain gauge 22 needs to be laid flat on the inner wall surface to be able to sense slight changes in the containing chamber 11; when more accurate temperature and deformation data are needed, the number of temperature probes 21 and strain gauges 22 can be increased, and the temperature probes 21 and strain gauges 22 can be distributed evenly or unevenly; the data collected by the temperature probe 21 and the strain gauge 22 can also be transmitted to the outside through a data line for data processing and analysis, and timely feedback can be given when an abnormality occurs, or it can be set to automatically cut off the working state of the battery in time to ensure the safety of the battery and the surrounding environment. By setting up the temperature probe 21 and the strain gauge 22, real-time monitoring of the internal temperature and external stress conditions of the battery cell can be achieved, thereby improving the safety performance and stability of the battery. The monitored temperature and deformation data can provide a timely and effective basis for the safety protection of the battery and reduce the risk of accidents during battery use.

[0039] In one embodiment, the shell includes a first opening and a second opening that are arranged opposite to each other, the first opening is covered with a first top cover 4, and the second opening is covered with a second top cover 5; the first top cover 4 and the second top cover 5 are respectively provided with a make way groove 10 for avoiding the elastic chamber 12.

[0040] In the above embodiment, the positions of the first top cover 4 and the second top cover 5 corresponding to the first opening and the second opening correspond to the accommodating chamber 11 and the elastic chamber 12 and are connected. The first top cover 4 and the second top cover 5 mainly function to seal and cover to ensure that the gas generated by the battery cell during operation or some substances such as the electrolyte of the battery cell itself will not leak into the external environment, and to ensure that external substances do not pollute the inside of the shell 1. At the same time, the first top cover 4 and the second top cover 5 need to have a certain pressure resistance to withstand changes in the internal pressure of the battery cell. In actual applications, the first top cover 4 and the second top cover 5 need to take into account explosion-proof, air leakage-proof and other safety aspects in terms of sealing performance to cope with internal pressure changes that may occur during the charging and discharging of the battery cell and when an abnormality occurs. The first top cover 4 and the second top cover 5 are provided with the give way groove 10 corresponding to the elastic chamber 12, which can avoid the elastic chamber 12 when the first top cover 4 and the second top cover 5 cover the first opening and the second opening, and make the first top cover 4 and the second top cover 5 and the shell 1 tightly sealed. After the first top cover 4 and the second top cover 5 cover the first opening and the second opening respectively, the junction between the top cover and the shell 1 is further welded to ensure the sealing effect, so as to prevent leakage from the give way groove 10 or even the gaps of each top cover.

[0041] In one embodiment, reference Figure 1 and Figure 4 , also includes an air pressure sensor 3, the first top cover 4 is provided with a first through hole 6, the air pressure sensor 3 is penetrated by the first through hole 6 and is sealed and fixedly connected to the first top cover 4.

[0042] In the above embodiment, the first top cover 4 is provided with a first through hole 6, which is used to install and fix the air pressure sensor 3 and can ensure the sealing of the housing 1 and the first top cover 4. At the same time, the air pressure sensor 3 can detect the air pressure change in the housing 1. When the battery is subjected to external impact or other abnormal conditions exist, the air pressure inside the battery may change. The air pressure sensor 3 can detect the abnormality of these parameters in time, and provide more accurate battery status monitoring results by coordinating with the detection component 2; the air pressure sensor 3 and the first top cover 4 can be sealed and connected by means of sealant, or the first top cover can be initially sealed and fixed by means of threads, and then connected with sealant to further enhance the sealing performance. The air pressure sensor 3 realizes real-time monitoring and detection of the air pressure inside the battery, improves the safety and stability of the battery system, and similarly to the detection component 2, can realize intelligent monitoring through the design of the line while providing reliable data support for external data transmission and management. According to the monitoring strategy of the battery pack in actual application, the detection component 2 and the air pressure sensor 3 can be set at the same time, or only one of them can be set, and the specific number is uncertain, which can also be further considered according to the monitoring strategy.

[0043] Furthermore, in the actual monitoring strategy of the battery pack, the number of temperature probes 21 can be recorded as n temperature probes, the number of strain gauges 22 can be recorded as n strain gauges, and the number of air pressure sensors 3 can be recorded as n air pressure sensors. In summary, n temperature probes + n strain gauges + n air pressure sensors ≥ 1. Specifically, the temperature probe 21, the strain gauge 22 and the air pressure sensor 3 can all be set, or only one of them can be set, but there must be one or more.

[0044] In one embodiment, reference Figure 1 and Figure 4 , further comprising a wiring harness 8, the first top cover 4 is further provided with a second through hole 7, the wiring harness 8 is passed through the second through hole 7, wherein the wiring harness 8 is electrically connected to the detection component 2 to transmit the detection data of the detection component 2. The wiring harness 8 is sealedly connected to the first top cover 4.

[0045] In the above embodiment, the wiring harness 8 is passed through the second through hole 7, and the sealant is used to enable the wiring harness 8 to be sealed with the first top cover 4 when it is passed through and connected to the first top cover 4, thereby ensuring the seal between the first top cover 4 and the shell 1. The wiring harness 8 is electrically connected to the detection component 2 and transmits detection data to the external system, thereby realizing the effective transmission of the internal detection data of the battery and the external system, providing important support for the intelligent monitoring and management of the battery system, and ensuring the stability and safety of the battery.

[0046] In one embodiment, reference Figure 5 An elastic buffer structure 9 is disposed in the elastic chamber 12; the detection component 2 and the elastic buffer structure 9 are staggered with each other.

[0047] In this embodiment, the elastic buffer structure 9 can further strengthen the role of the elastic chamber 12, so that the core stack 100 can absorb and disperse the impact force when it is subjected to external impact, extrusion or expansion of the core stack 100 itself, thereby protecting the core stack 100 from damage. The elastic buffer structure 9 can be formed by integral extrusion of the same material as the shell 1 to save production costs, or it can be made of highly elastic materials such as rubber, silicone, etc., and materials of different hardness and wear resistance can be selected according to specific needs. These materials have good resilience and deformation ability, can quickly restore to their original state after being subjected to force, and have good durability. The form of the elastic buffer structure 9 can be a wavy or mesh structure. The specific form is not limited here, and it only needs to consider the elastic buffer function; in order to ensure the accuracy of the detection result of the detection component 2, the detection component 2 and the elastic buffer structure 9 are staggered and do not stack and touch each other, so that the battery state can be accurately detected, and the role of the elastic buffer structure 9 can be fully utilized to provide effective protection to ensure the safe operation of the battery.

[0048] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A smart battery cell, characterized in that: include: A shell, the shell comprising at least two accommodating chambers for accommodating the core stack, and an elastic chamber arranged between two adjacent accommodating chambers; A detection component is arranged on the inner wall surface of the elastic chamber.

2. The smart battery cell according to claim 1, characterized in that: The detection component includes a temperature probe.

3. The smart battery cell according to claim 1, characterized in that: The detection component includes a strain gauge.

4. The smart battery cell according to claim 1, characterized in that: The shell comprises a first opening and a second opening which are arranged opposite to each other. The first opening is covered by a first top cover, and the second opening is covered by a second top cover.

5. The smart battery cell according to claim 4, characterized in that: It also includes an air pressure sensor. The first top cover is provided with a first through hole. The air pressure sensor is passed through the first through hole and is sealed and fixedly connected to the first top cover.

6. The smart battery cell according to claim 4, characterized in that: It also includes a wiring harness, and the first top cover is also provided with a second through hole, and the wiring harness is passed through the second through hole, wherein the wiring harness is electrically connected to the detection component to transmit the detection data of the detection component.

7. The smart battery cell according to claim 6, characterized in that: The wiring harness is sealingly connected to the first top cover.

8. The smart battery cell according to claim 4, characterized in that: The first top cover and the second top cover are respectively provided with a clearance groove for avoiding the elastic chamber.

9. The smart battery cell according to any one of claims 1 to 8, characterized in that: An elastic buffer structure is arranged in the elastic chamber.

10. The smart battery cell according to claim 9, characterized in that: The detection component and the elastic buffer structure are arranged staggered with each other.

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