CN218241944U - Battery core, battery module and battery pack - Google Patents
Battery core, battery module and battery pack Download PDFInfo
- Publication number
- CN218241944U CN218241944U CN202220580511.5U CN202220580511U CN218241944U CN 218241944 U CN218241944 U CN 218241944U CN 202220580511 U CN202220580511 U CN 202220580511U CN 218241944 U CN218241944 U CN 218241944U
- Authority
- CN
- China
- Prior art keywords
- battery
- core
- parameter
- battery cell
- winding core
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Secondary Cells (AREA)
Abstract
The application discloses electric core, battery module and battery package. Wherein, electric core includes: a housing comprising an inner layer and an outer layer, the inner layer and the outer layer together forming a protection for storing and releasing a protective material; a winding core accommodated in the inner layer; the detection device is arranged on the shell and/or the winding core and is used for detecting the expansion parameter of the winding core, and when the expansion parameter reaches a preset threshold value, the protection part can release the protection material onto the surface of the winding core; wherein the expansion parameter comprises at least one of a temperature parameter, a deformation parameter and a voltage parameter. The embodiment of the application can realize real-time monitoring and intervention on the cell expansion phenomenon, and improves the applicability of cell expansion monitoring.
Description
Technical Field
The application relates to the technical field of battery cores, in particular to a battery core, a battery module and a battery pack.
Background
At present, the expansion phenomenon of the battery cell can bring the following adverse effects to the battery cell: firstly, the service life and the service performance of the battery cell are influenced; secondly, the heat dissipation performance of the battery cell is influenced; and thirdly, the cell module end plate is required to have higher bearing strength.
In the related art, the problem of cell expansion is solved by the following means: firstly, the structural design of the battery module is changed, the strength of welding seams, end plates, adhesive and the like is improved, and a sufficient strength threshold value is reserved, so that the battery module can bear the expansion phenomenon of the whole life cycle of a battery core; secondly, proper internal clearance, external clearance and pretightening force of the aluminum shell are designed to ensure that the interface contact of the battery cell is good in the initial life stage of the battery cell, and along with the recycling of the battery cell, the thickness of the battery cell in the whole life cycle is in a certain range, namely the positive and negative electrodes of the battery cell in the whole life cycle are kept in good contact.
However, both of the above two methods belong to passively receiving the cell expansion, that is, adjusting the internal structure of the cell according to the estimated expansion deformation. And, the inflation phenomenon of different model batteries has the difference, need design specific module structure according to specific battery cell model, therefore above-mentioned two kinds of modes have certain limitation.
SUMMERY OF THE UTILITY MODEL
The present application is directed to solving at least one of the problems in the prior art. For this reason, this application provides an electricity core, battery module and battery package, can realize the real-time supervision and the intervention to electric core inflation phenomenon to the suitability of electric core inflation monitoring has been improved.
The battery cell according to the embodiment of the first aspect of the present application includes: a housing comprising an inner layer and an outer layer, the inner layer and the outer layer together forming a protection for storing and releasing a protective material; the winding core is accommodated in the inner layer; the detection device is arranged on the shell and/or the winding core and is used for detecting the expansion parameter of the winding core, and when the expansion parameter reaches a preset threshold value, the protection part can release the protection material onto the surface of the winding core; wherein the expansion parameter comprises at least one of a temperature parameter, a deformation parameter and a voltage parameter.
According to the battery cell provided by the embodiment of the application, at least the following beneficial effects are achieved: detect the inflation parameter through detection device, when confirming that electric core takes place the inflation phenomenon according to this inflation parameter and preset threshold value, protection portion can release the surface of rolling up the core with the protection material to realized the expanded real-time supervision of electric core and intervene, guaranteed the suitability of electric core inflation monitoring, and improved the working property and the security performance of electric core to a certain extent, and then prolonged the life of electric core.
According to some embodiments of the application, the protection portion comprises: an accommodation chamber for storing the protective material; the valve is arranged on the accommodating cavity; and the controller is connected with the valve and is used for controlling the conducting state of the valve so as to release the protective material in the containing cavity onto the surface of the winding core.
According to some embodiments of the present application, the protective material comprises an electrolyte; the detection device comprises at least one of a pressure sensor, a deformation sensor, a voltage sensor and a temperature sensor.
According to some embodiments of the application, the protective material is any one of a flame retardant, a coolant, an electrolyte.
According to some embodiments of the present application, the battery cell includes a plurality of accommodating cavities and a plurality of detecting devices, and one accommodating cavity is at least disposed corresponding to one detecting device.
According to some embodiments of the present application, the battery cell includes three accommodating cavities, where the three accommodating cavities are a first accommodating cavity, a second accommodating cavity, and a third accommodating cavity; the first accommodating cavity, the second accommodating cavity and the third accommodating cavity store and release different protective materials.
According to some embodiments of the application, roll up the core and include positive plate, negative pole piece and diaphragm, the electricity core still includes: pinning, the pinning is nanometer, the pinning is formed by electrolyte additive in the positive plate, negative pole piece and the clearance of diaphragm.
According to some embodiments of the present application, the detection device is at least one of a wired device, a wireless device.
According to the battery module of the embodiment of the second aspect of the present application, including: a plurality of cells as described in any of the above embodiments.
A battery pack according to an embodiment of a third aspect of the present application includes: at least one battery module as described in the above embodiments; the battery management system is connected with at least one detection device of the battery core to acquire the expansion parameter of the winding core, and the battery management system is connected with the protection part to control the protection part to release the protection material onto the surface of the winding core when the expansion parameter reaches a preset threshold value.
The embodiment of the application provides an electricity core, battery module and battery package pass through pressure sensor, deformation sensor, voltage sensor, at least one among the temperature sensor, the inflation phenomenon to electric core, the temperature, at least one among the voltage carries out real-time supervision, and at the inflation phenomenon takes place for electric core in the affirmation, and/or when danger such as explosion exists for electric core, switch on through controller control flap, so that electrolyte, the coolant, at least one among the fire retardant flows from the chamber of acceping that corresponds, thereby the aggravation of electric core inflation phenomenon has been avoided, and then the performance and the security performance of electric core have been guaranteed.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The present application is further described with reference to the following figures and examples, in which:
fig. 1A is a schematic structural diagram of a battery cell according to an embodiment of the present disclosure;
fig. 1B is a schematic structural diagram of a portion a of a battery cell according to an embodiment of the present application;
FIG. 2 is a schematic structural diagram of a protection portion according to an embodiment of the present application;
fig. 3A is another schematic structural diagram of a battery cell according to an embodiment of the present application;
fig. 3B is another schematic structural diagram of a battery cell according to an embodiment of the present application.
Reference numerals:
the battery cell 100, the casing 110, the inner layer 111, the outer layer 112, the winding core 120, the detection device 130, the protection part 140, the housing cavity 141, and the valve 142.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.
In the description of the present application, it is to be understood that the positional descriptions, such as the directions of up, down, front, rear, left, right, etc., referred to herein are based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the referred device or element must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present application.
In the description of the present application, the meaning of a plurality is one or more, the meaning of a plurality is two or more, and larger, smaller, larger, etc. are understood as excluding the present numbers, and larger, smaller, inner, etc. are understood as including the present numbers. If there is a description of first and second for the purpose of distinguishing technical features only, this is not to be understood as indicating or implying a relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of technical features indicated.
In the description of the present application, unless otherwise specifically limited, terms such as set, installed, connected and the like should be understood broadly, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present application in combination with the specific contents of the technical solutions.
In the description of the present application, reference to the description of "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples", etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Referring to fig. 1A and 1B, an embodiment of the present application provides a battery cell 100. The battery cell 100 includes a casing 110, a winding core 120, and a detection device 130. The inner layer 111 of the case 110 forms a protection part 140 for storing and releasing a protection material together with the outer layer 112 of the case 110; the core 120 is accommodated in the inner layer 111 of the case 110; the detection device 130 is arranged on the shell 110 and/or the winding core 120, the detection device 130 is used for detecting the expansion parameter of the winding core 120, and when the expansion parameter reaches a preset threshold value, the protection part can release the protection material onto the surface of the winding core; wherein the expansion parameter comprises at least one of a temperature parameter, a deformation parameter and a voltage parameter.
Specifically, the battery cell 100 may swell during actual use due to charge and discharge cycles, gas generation from oxidative decomposition of the electrolyte, water entry due to insufficient sealing of the case 110, and the like. In order to avoid the expansion phenomenon of the battery cell 100 and the possible explosion hazard when the battery cell 100 expands, the casing 110 is configured as a double-layer structure, i.e., the casing 110 includes an inner layer 111 and an outer layer 112. The winding core 120 is disposed in a cavity surrounded by the inner wall of the inner layer 111, and the protection portion 140 is disposed in the interlayer formed by the inner layer 111 and the outer layer 112. The detection device 130 may be disposed on the outer wall of the outer layer 112 of the shell 110 and/or on the outer surface of the roll core, depending on the detection accuracy requirements. The detection device 130 is configured to detect an expansion parameter of the battery cell 100 in real time, where the expansion parameter is a parameter related to an expansion state of the battery cell 100, such as a temperature parameter, a deformation parameter, and a voltage parameter. External systems such as a battery management system analyze and process the expansion parameter, and compare the analyzed and processed parameter with a preset threshold value to determine whether the battery core 100 is expanded. When the swelling parameter reaches the preset threshold, it is determined that the battery cell 100 swells and/or the battery cell 100 has a risk of explosion, and at this time, an external system such as a battery management system generates a control signal and sends the control signal to the protection unit 140. The protection part 140 releases the protection material according to the control signal, so that the protection material is in contact with the surface of the winding core 120, thereby alleviating the swelling phenomenon of the battery cell 100 and/or avoiding the danger of explosion and the like. The protective material is a material for relieving the swelling phenomenon of the battery cell 100 and/or avoiding the danger of explosion and the like. It is to be understood that the manner of releasing the protective material by the protective part 140 also includes the manner of controlling by the battery cell 100 itself, and the embodiment of the present application is not limited in particular.
The embodiment of the application provides a battery core 100 passes through detection device 130 and detects the inflation parameter, when according to this inflation parameter and predetermine the threshold value and confirm that battery core 100 takes place the inflation phenomenon, protection portion 140 can release the surface of rolling up core 120 with the protection material, thereby realized the real-time supervision and the intervention to the inflation of battery core 100, the suitability of battery core inflation monitoring has been guaranteed, and the working property and the security performance of battery core 100 have been improved to a certain extent, and then the life of battery core 100 has been prolonged.
Referring to fig. 1A to 2, in some embodiments, the protection part 140 includes a housing chamber 141, a valve 142, and a controller (not shown). The accommodating chamber 141 is used for storing a protective material; the valve 142 is disposed on the accommodating cavity 141; a controller is connected to the valve 142 and is configured to control the open state of the valve 142 to release the protective material in the receiving cavity 141 onto the surface of the core 120.
Specifically, the controller includes components such as a control chip, and for example, the controller is communicatively connected to an external system such as a battery management system, and when the battery management system determines that the battery cell 100 has a swelling phenomenon and/or the battery cell 100 has a danger such as an explosion according to the swelling parameter sent by the detection device 130, the battery management system generates a corresponding control signal. The controller controls the valve 142 to conduct according to the control signal, so that the protection material flows out from the valve 142, and the protection material is in contact with the surface of the winding core 120, thereby alleviating the expansion phenomenon of the battery cell 100 and/or avoiding the danger of explosion and the like of the battery cell 100. It is understood that, when the manner of releasing the protective material by the protective part 140 is controlled by the battery cell 140 itself, the manner of controlling the valve 142 to conduct by the controller may be adapted to the above description according to the structure of the battery cell 140 itself, and the embodiment of the present application is not limited in particular.
In some embodiments, the detection device 130 includes at least one of a pressure sensor, a deformation sensor, a voltage sensor, and a temperature sensor, and the protective material is any one of a flame retardant, a coolant, and an electrolyte. The expansion state of the battery cell 100 may be determined by the deformation state, the operating state, and the like of the battery cell 100, and therefore, the battery management system may determine whether the battery cell 100 has an expansion phenomenon and whether the battery cell 100 has a danger of explosion and the like according to at least one of the deformation state and the operating state. The pressure sensor and the deformation sensor are configured to provide expansion parameters for determining a deformation state of the battery cell 100, and the voltage sensor and the temperature sensor are configured to provide expansion parameters for determining an operating state of the battery cell 100.
Referring to fig. 1A-3B, in some embodiments, the detection device 130 includes at least one of a pressure sensor (e.g., a membrane pressure sensor), a deformation sensor (e.g., a strain gauge sensor). Specifically, a pressure sensor and a deformation sensor are used to detect a deformation parameter of the battery cell 100, and the pressure sensor and the deformation sensor may be disposed on an outer wall of the outer layer 112 of the casing 110 and/or on an outer surface of the winding core 120. When disposed on the outer wall of the outer layer 112 of the casing 110, the pressure sensor and the deformation sensor are connected to the management system of the battery cell 100 by wire or wirelessly. When the pressure sensor and the deformation sensor are arranged on the outer surface of the winding core 120, the pressure sensor and the deformation sensor are wirelessly connected with the battery cell 100 management system.
In some embodiments, when the battery cell 100 swells, the air pressure inside the battery cell 100 changes, and at this time, the pressure sensor sends the detected pressure (i.e., the deformation parameter) to the battery management system, and the battery management system receives and determines the deformation parameter, and when the deformation parameter is greater than a preset threshold, it is determined that the battery cell 100 swells. And/or, the battery management system calculates the expansion deformation Δ L of the battery cell 100 according to the following formula (1) 1 When the deformation is expanded by Δ L 1 And when the value is greater than the preset threshold value, determining that the battery cell 100 swells.
ΔL 1 ＝F 1 ·L 0 /(AE).. A
Wherein, F 1 Indicating the pressure (i.e., deformation parameter) detected by the pressure sensor; a denotes an initial cross-sectional area of the battery cell 100; e represents the modulus of elasticity of the winding core 120; l is 0 Indicating the initial thickness of the battery cell 100.
In other embodiments, the deformation sensor is disposed on the outer wall of the outer layer 112 of the casing 110, when the battery core 100 expands, the distance between the winding core 120 and the inner layer 111 changes, and the time interval between the transmission of the signal and the reception of the signal by the deformation sensor is t when the expansion does not occur 1 Becomes t 2 . Therefore, the battery management system can calculate the distance change Δ L between the winding core 120 and the inner layer 111 according to the following formula (2) 2 And the expansion force F is obtained by conversion according to the following formula (3) 2 . The battery management system is based on the expansion force F 2 And determining whether the battery cell 100 has a swelling phenomenon and/or is in danger of explosion or the like by using a preset threshold value.
ΔL 2 ＝C·(t 1 -t 2 ) /(2.2.).. The.
ΔL 2 ＝F 2 ·L 0 /(AE).
Where C represents the transmission speed of the transmission signal (or the reception signal) in the electrolyte.
Wherein the battery management systemThe expansion deformation DeltaL which can also be obtained by the above method 1 And/or expansion force F 2 And predicting the current performance attenuation state of the battery core 100, and when the difference between the current performance attenuation state and the design value is within a preset range, generating a corresponding control signal by the battery management system so as to control the release of the electrolyte stored in the accommodating cavity 141. For example, the design value of the capacity retention rate after the battery cell 100 is used for three years is set to 85% to 95%, and thus the expansion deformation Δ L is set 1 And/or expansion force F 2 When the current capacity retention rate of the battery cell 100 is predicted to be 75% to 90%, the electrolyte is controlled to be released, so that a liquid replenishing operation is performed on the battery cell 100.
In some embodiments, the detection device 130 further comprises a voltage sensor, which may be disposed on an outer wall of the outer layer 112 of the housing 110 and/or on an outer surface of the roll core 120. When disposed on the outer wall of the outer layer 112 of the housing 110, the voltage sensor is wired, or wirelessly connected, to the battery management system. When disposed on the outer surface of the roll core 120, the voltage sensor is wirelessly connected to the battery management system.
When the charge-discharge cycle number of the battery cell 100 increases, the polarization phenomenon inside the battery cell 100 will be aggravated, lithium is separated from the negative plate at the moment, the decomposition speed of the electrolyte is accelerated, the thickness of the winding core 120 is increased, and the charge-discharge capacity of the battery cell 100 is accelerated and attenuated. Therefore, the battery management system obtains a relation curve between the voltage parameter and the service time SOH according to the voltage parameter detected by the voltage sensor, and the battery management system determines the electrolyte state (that is, the working state includes the electrolyte state) of the battery cell 100 according to the relation curve, and generates a corresponding control signal when the relation curve reaches a first preset early warning range. The controller switches on the corresponding valve 142 on the accommodating cavity 141 according to the control signal, so that the electrolyte can flow out of the accommodating cavity 141, and the electrolyte is in surface contact with the winding core 120, thereby ensuring the working performance of the battery cell 100, avoiding aggravation of the expansion phenomenon of the battery cell 100 to a certain extent, and further realizing real-time monitoring and intervention on the battery cell 100.
In some embodiments, the detection device 130 includes a temperature sensor, and the temperature sensor is configured to detect a temperature parameter of the battery cell 100. The temperature sensor may be disposed on an outer wall of the outer layer 112 of the shell 110 and/or on an outer surface of the jellyroll 120. When disposed on the outer wall of the outer layer 112 of the housing 110, the temperature sensor is wired, or wirelessly connected, to the battery management system. When disposed on the outer surface of the jellyroll 120, the temperature sensor is wirelessly connected to the battery management system.
When the battery cell 100 is subjected to high-temperature cyclic overcharge, the battery cell 100 may swell. Therefore, the battery management system constructs a temperature rise curve according to the temperature parameter detected by the temperature sensor, determines the temperature state (i.e., the working state includes the temperature state) of the battery cell 100 according to the temperature rise curve, and generates a corresponding control signal according to the relationship between the temperature rise curve and the preset early warning range. The controller controls the valve 142 on the accommodating cavity 141 to be conducted according to the control signal, so that the flame retardant or the coolant can flow out of the accommodating cavity 141, and the flame retardant or the coolant is in contact with the surface of the winding core 120, thereby avoiding aggravation of the expansion phenomenon of the battery cell 100 and avoiding dangers such as explosion and the like to a certain extent.
For example, for the battery cell 100 of the high nickel system, when the temperature parameter is less than 60 ℃, the battery cell 100 is determined to be in a safe state; controlling the release of coolant when the temperature parameter is in the range of 60 ℃ to 100 ℃; when the temperature parameter is more than 100 ℃, the flame retardant is controlled to be released. For the battery cell 100 of the lithium iron phosphate system, when the temperature parameter is less than 60 ℃, determining that the battery cell 100 is in a safe state; controlling the release of the coolant when the temperature parameter is in the range of 60 ℃ to 180 ℃; when the temperature parameter is more than 180 ℃, the flame retardant is controlled to be released.
Referring to fig. 1A to fig. 2, in some embodiments, the battery cell 100 includes a plurality of accommodating cavities 141 and a plurality of detecting devices 130, where one accommodating cavity 141 corresponds to at least one detecting device 130. Specifically, a plurality of housing cavities 141 are provided at different positions within the interlayer of the battery cell 100, and each housing cavity 141 is used for storing one type of protective material. For example, the battery cell 100 includes three accommodation cavities, namely a first accommodation cavity for storing an electrolyte, a second accommodation cavity for storing a flame retardant, and a third accommodation cavity for storing a coolant. It is understood that the detecting device 130 can be disposed on the outer wall of the outer layer 112 of the shell 110 and/or on the outer surface of the winding core 120 corresponding to the receiving cavity 141 for storing any one of the protective materials.
In a specific embodiment, in order to ensure the effectiveness of the protection material, when the temperature rise curve of the top of the battery cell 100 is determined to be within the warning range according to the detection device 130, the battery management system sends a control signal to the controller disposed at the top, so that the receiving cavity 141 disposed at the top releases the coolant and/or the fire retardant from the valve 142 according to the control of the controller.
In some embodiments, the jellyroll 120 includes a positive electrode sheet, a negative electrode sheet, and a separator; the battery cell 100 further comprises pinning, the pinning is in a nanometer level, and the pinning is formed in gaps of the positive plate, the diaphragm and the negative plate by an electrolyte additive. Specifically, the winding core 120 is formed by winding or laminating a positive electrode sheet, a separator, and a negative electrode sheet in this order. In the use process of the battery cell 100, lithium ions reciprocate between the positive and negative pole pieces along with the charging and discharging operations, so that the good interface contact can improve the transmission efficiency of the lithium ions. However, as the number of times of the battery cell 100 being charged and discharged increases, the distance between the positive and negative electrode plates and the separator becomes larger, and even a "delamination" phenomenon occurs, thereby weakening the interface contact of the battery cell 100. Based on this, in the embodiment of the present application, a Z-pin pinning enhancement technology is adopted, and pinning is sequentially inserted into the positive plate, the separator, and the negative plate in the serious delamination region in the thickness direction (i.e., the direction perpendicular to the winding direction) of the winding core 120 by using an ultrasonic machine, so as to improve interlayer toughness and further reduce "delamination". Wherein the pinning is a thin rod made of insulating material (such as fiber) and having a length less than 1 mm. It can be understood that an additive can be added into the electrolyte of the winding core 120, and the additive enters the gaps between the positive and negative plates and the separator and forms microscopic nano pinning. Under a certain temperature condition, pinning generates a pinning effect in the electrolyte, so that good interface performance is formed between lithium ions and the positive and negative pole pieces, and the electrical property of the battery cell is ensured.
Secondly, a micro spring may be further disposed on the inner surface of the casing, and when it is determined that the battery cell 100 has a swelling phenomenon according to any one of the above-described embodiments, the micro spring is controlled to eject the pinning bullet disposed on the micro spring into the gap between the positive electrode tab, the separator, and the negative electrode tab.
The battery cell provided by the embodiment of the application carries out real-time monitoring through at least one of the temperature parameter, the voltage parameter, the deformation parameter of detection device to the battery cell, and take place the inflation phenomenon in confirming the battery cell, and/or when danger such as explosion exists in the battery cell, switch on through controller control flap, so that flow out from the corresponding chamber of acceping in at least one kind among electrolyte, coolant, the fire retardant, thereby avoided the aggravation of battery cell inflation phenomenon, and then guaranteed the performance and the security performance of battery cell. It can be understood that, in the above embodiment, the preset threshold and the preset early warning range may be adaptively set according to the specific model of the battery cell, and this embodiment of the present application is not specifically limited.
The embodiment of the application further provides a battery module, which comprises a plurality of battery cores described in any of the above embodiments.
It can be seen that, the contents in the foregoing cell embodiment are all applicable to this battery module embodiment, the functions specifically implemented by this battery module embodiment are the same as those in the foregoing cell embodiment, and the beneficial effects achieved by this battery module embodiment are also the same as those achieved by the foregoing cell embodiment.
The embodiment of the application also provides a battery pack. The battery pack includes:
at least one battery module as described in the above embodiments;
the battery management system is connected with the detection device of at least one electric core to obtain the expansion parameter of the roll core, and the battery management system is connected with the protection part, so that when the expansion parameter reaches a preset threshold value, the battery management system can control the protection part to release the protection material onto the surface of the roll core.
Similarly, the contents in the above-described battery cell embodiment are all applicable to the battery pack embodiment, the functions specifically implemented in the battery pack embodiment are the same as those in the above-described battery cell embodiment, and the beneficial effects achieved by the battery pack embodiment are also the same as those achieved by the above-described battery cell embodiment.
The embodiments of the present application have been described in detail with reference to the drawings, but the present application is not limited to the embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present application. Furthermore, the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
Claims (10)
1. Electric core, its characterized in that includes:
a housing comprising an inner layer and an outer layer, the inner layer and the outer layer together forming a protection for storing and releasing a protective material;
a winding core accommodated in the inner layer;
the detection device is arranged on the shell and/or the winding core and is used for detecting the expansion parameter of the winding core, and when the expansion parameter reaches a preset threshold value, the protection part can release the protection material onto the surface of the winding core; wherein the expansion parameter comprises at least one of a temperature parameter, a deformation parameter and a voltage parameter.
2. The cell of claim 1, wherein the protective portion comprises:
an accommodation chamber for storing the protective material;
the valve is arranged on the accommodating cavity;
a controller connected to the valve, the controller being configured to control a conducting state of the valve to release the protective material in the receiving cavity onto the surface of the winding core.
3. The electrical core according to claim 2, wherein the detection device comprises at least one of a pressure sensor, a deformation sensor, a voltage sensor, and a temperature sensor.
4. The electrical core of claim 2, wherein the protective material is any one of a flame retardant, a coolant, and an electrolyte.
5. The electric core according to any of claims 2 to 4, wherein the electric core comprises a plurality of the accommodating cavities and a plurality of the detection devices, and one accommodating cavity is at least arranged corresponding to one detection device.
6. The battery cell of claim 5, wherein the battery cell comprises three accommodating cavities, and the three accommodating cavities are a first accommodating cavity, a second accommodating cavity and a third accommodating cavity;
the first accommodating cavity, the second accommodating cavity and the third accommodating cavity store and release different protective materials.
7. The cell of claim 6, wherein the winding core comprises a positive plate, a negative plate, and a separator, and the cell further comprises:
pinning, wherein the pinning is nano-scale, and the pinning is formed in gaps of the positive plate, the negative plate and the diaphragm by an electrolyte additive.
8. The electrical core of claim 7, wherein the detection device is at least one of a wired device and a wireless device.
9. Battery module, its characterized in that includes: a plurality of cells of any of claims 1 to 8.
10. A battery pack, comprising:
at least one battery module according to claim 9;
the battery management system is connected with at least one detection device of the battery core to acquire the expansion parameter of the winding core, and the battery management system is connected with the protection part to control the protection part to release the protection material onto the surface of the winding core when the expansion parameter reaches a preset threshold value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220580511.5U CN218241944U (en) | 2022-03-17 | 2022-03-17 | Battery core, battery module and battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220580511.5U CN218241944U (en) | 2022-03-17 | 2022-03-17 | Battery core, battery module and battery pack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218241944U true CN218241944U (en) | 2023-01-06 |
Family
ID=84662801
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220580511.5U Active CN218241944U (en) | 2022-03-17 | 2022-03-17 | Battery core, battery module and battery pack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218241944U (en) |
-
2022
- 2022-03-17 CN CN202220580511.5U patent/CN218241944U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9653724B2 (en) | Secondary battery, and secondary battery module and secondary battery pack comprising the same | |
| KR101793849B1 (en) | Nonaqueous electrolyte secondary battery and pack battery | |
| Chen et al. | All-temperature-area battery application mechanism, performance and strategies | |
| US9337459B2 (en) | Sealed secondary battery | |
| CN107534191A (en) | The battery module of probe including the expansion for detecting battery cell | |
| KR20170050926A (en) | A secondary battery, secondary battery charging system and secondary battery production method to prevent battery cell swelling by detecting a displacement of gas venting unit | |
| US9551753B2 (en) | Electric storage system determining operation of current breaker | |
| JP2007200795A (en) | Lithium ion secondary battery | |
| US10461371B2 (en) | Method for operating a battery cell | |
| WO2022056787A1 (en) | Three-electrode battery and energy storage system | |
| JP2014096269A (en) | Nonaqueous secondary battery | |
| JP2013258150A (en) | Lithium ion secondary battery | |
| CN214588915U (en) | Electrode assembly, battery cell, battery, and power consumption device | |
| CN218241944U (en) | Battery core, battery module and battery pack | |
| JP5626190B2 (en) | Power storage system | |
| CN106458038A (en) | Method for operating an energy storage unit, battery management system for performing such a method and energy storage unit with such a battery management system | |
| JP2018142525A (en) | Power storage element and control method for power storage element | |
| EP3598524B1 (en) | SECONDARY BATTERY AND INSULATOR FOR SECONDARY BATTERY\n | |
| US9231270B2 (en) | Lithium-ion battery | |
| JP7449456B2 (en) | Circuit control method, battery and its controller and management system, power receiving device | |
| CN218242005U (en) | Support and electric core | |
| CN115377582A (en) | Battery monomer, battery module, battery package, energy storage system and electric automobile | |
| CN115566297A (en) | Battery monomer, battery module, battery package, energy storage system and electric automobile | |
| CN115939694A (en) | Method for determining liquid injection amount of single battery | |
| CN217606875U (en) | Secondary battery and battery pack |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 518000 1-2 Floor, Building A, Xinwangda Industrial Park, No. 18 Tangjianan Road, Gongming Street, Guangming New District, Shenzhen City, Guangdong Province Patentee after: Xinwangda Power Technology Co.,Ltd. Address before: 518000 Xinwangda Industrial Park, No.18, Tangjia south, Gongming street, Guangming New District, Shenzhen City, Guangdong Province Patentee before: SUNWODA ELECTRIC VEHICLE BATTERY Co.,Ltd. |