CN216872114U - Battery and electric equipment - Google Patents
Battery and electric equipment Download PDFInfo
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- CN216872114U CN216872114U CN202220351344.7U CN202220351344U CN216872114U CN 216872114 U CN216872114 U CN 216872114U CN 202220351344 U CN202220351344 U CN 202220351344U CN 216872114 U CN216872114 U CN 216872114U
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Abstract
A battery and a power consumption device are provided. The battery includes: a plurality of battery cells arranged in a first direction; the heat management component extends along a first direction and is connected with a first wall of each of the plurality of battery cells, the first wall is a wall with the largest surface area in the battery cells, and the heat management component is used for adjusting the temperature of the battery cells; wherein, in the second direction, a dimension H1 of the thermal management component and a dimension H2 of the first wall satisfy: H1/H2 is more than or equal to 0.1 and less than or equal to 2, and the second direction is perpendicular to the first direction and parallel to the first wall. According to the technical scheme, the capacity density of the battery can be improved, and meanwhile the thermal management requirement of the battery can be met, so that the performance of the battery is improved.
Description
Technical Field
The application relates to the field of charging, more specifically relates to a battery and consumer.
Background
With the increasing environmental pollution, the new energy industry is more and more concerned by people. In the new energy industry, battery technology is an important factor regarding its development.
The energy density of the battery is an important parameter in the performance of the battery, however, other performance parameters of the battery need to be considered when improving the energy density of the battery. Therefore, how to improve the performance of the battery is an urgent technical problem to be solved in the battery technology.
SUMMERY OF THE UTILITY MODEL
The embodiment of the application provides a battery and electric equipment, and the energy density of the battery can be improved while the thermal management requirement in the battery is met, so that the performance of the battery is improved.
In a first aspect, a battery is provided, comprising: a plurality of battery cells arranged in a first direction; a thermal management member extending in the first direction and connected to a first wall of each of the plurality of battery cells, the first wall having a largest surface area in the battery cell, the thermal management member being configured to regulate a temperature of the battery cell; wherein, in a second direction, a dimension H1 of the thermal management component and a dimension H2 of the first wall satisfy: 0.1 ≦ H1/H2 ≦ 2, the second direction perpendicular to the first direction and parallel to the first wall.
In the embodiment of the application, the heat management part is connected with a first wall with the largest surface area of each battery cell in a row of a plurality of battery cells arranged along a first direction, wherein the size H1 of the heat management part and the size H2 of the first wall meet the condition that H1/H2 is less than or equal to 0.1 and less than or equal to 2 along the first direction. Therefore, the middle part of the box body of the battery does not need to be provided with structures such as a beam and the like, and the space utilization rate in the battery can be improved to a large extent, so that the energy density of the battery is improved; meanwhile, the thermal management component can meet the thermal management requirement in the battery. Therefore, the technical scheme of the embodiment of the application can meet the thermal management requirement in the battery while improving the energy density of the battery, so that the performance of the battery can be improved.
In one possible implementation, the dimension H1 of the thermal management component and the dimension H2 of the first wall further satisfy: H1/H2 is more than or equal to 0.3 and less than or equal to 1.3. In this way, it can be ensured that the temperature of the battery cell does not exceed 55 ℃ during the charging, especially the quick charging, of the battery.
In one possible implementation manner, the heat exchange area between the first wall and the heat management component is S, and the relationship between the capacity Q of the battery cell and the heat exchange area S satisfies: 0.03Ah/cm2≤Q/S≤6.66Ah/cm2. Therefore, the temperature of the battery cell can be maintained in a proper range in the quick charging process; in addition, when the capacity Q of the battery monomer is fixed, the heat exchange area S can be adjusted, and the heat management requirement of the battery can be flexibly met.
In one possible implementation, the dimension H1 of the thermal management component is 1.5cm to 30 cm. Therefore, the temperature of the battery monomer can be ensured not to exceed 55 ℃ in the process of quick charging of the battery.
In one possible implementation, the thermal management component includes a first thermally conductive plate and a second thermally conductive plate disposed opposite each other in a third direction; the first heat-conducting plate and the second heat-conducting plate are provided with a flow channel therebetween, the flow channel is used for containing and adjusting fluid of the temperature of the battery monomer, and the third direction is perpendicular to the first direction and the second direction.
In a possible implementation manner, the heat management part further comprises a reinforcing rib, the reinforcing rib is arranged between the first heat conducting plate and the second heat conducting plate, and the reinforcing rib, the first heat conducting plate and the second heat conducting plate form the flow channel. In this way, the structural strength of the thermal management component is increased.
In a possible implementation manner, an included angle between the reinforcing rib and the first heat-conducting plate or the second heat-conducting plate is an acute angle. In this way, in the third direction, the thermal management component can have a larger compression space and can provide an expansion space for the battery cell.
In a possible implementation manner, the battery cell includes two first walls disposed opposite to each other in a third direction and two second walls disposed opposite to each other in the first direction, wherein the second walls of two adjacent battery cells are opposite to each other in the first direction, and the third direction is perpendicular to the first direction and the second direction. Therefore, the first wall with a large area is connected with the thermal management component, so that the heat exchange of the single battery is facilitated, and the performance of the battery is guaranteed.
In one possible implementation manner, the battery includes a plurality of rows of the plurality of battery cells and the plurality of thermal management components arranged along the first direction, wherein the plurality of rows of the battery cells and the plurality of thermal management components are alternately arranged in a third direction, and the third direction is perpendicular to the first direction and the second direction. Like this, multiseriate battery monomer and a plurality of thermal management parts interconnect form a whole, hold in the box, can enough carry out effectual thermal management to each battery monomer, can guarantee the holistic structural strength of battery again to can promote the performance of battery.
In one possible implementation, the thermal management component is bonded to the first wall. In this way, the strength of the connection between the thermal management component and the first wall is increased.
In a second aspect, an electrical device is provided, comprising: the battery of the first aspect or any possible implementation manner of the first aspect, wherein the battery is used for providing electric energy.
In a third aspect, a method for preparing a battery is provided, comprising: providing a plurality of battery cells arranged in a first direction; providing a thermal management member extending in the first direction and connected to a first wall of each of the plurality of battery cells, the first wall having a largest surface area in the battery cell, the thermal management member being configured to regulate a temperature of the battery cell; wherein, in a second direction, a dimension H1 of the thermal management component and a dimension H2 of the first wall satisfy: 0.1 ≦ H1/H2 ≦ 2, the second direction perpendicular to the first direction and parallel to the first wall.
In a fourth aspect, there is provided an apparatus for preparing a battery, comprising means for performing the method of the third aspect described above.
In the embodiment of the application, the heat management part is connected with a first wall with the largest surface area of each battery cell in a row of a plurality of battery cells arranged along a first direction, wherein the size H1 of the heat management part and the size H2 of the first wall meet the condition that H1/H2 is less than or equal to 0.1 and less than or equal to 2 along the first direction. Therefore, the middle part of the box body of the battery does not need to be provided with structures such as a beam and the like, and the space utilization rate in the battery can be improved to a large extent, so that the energy density of the battery is improved; meanwhile, the thermal management component can meet the thermal management requirement in the battery. Therefore, the technical scheme of the embodiment of the application can meet the thermal management requirement in the battery while improving the energy density of the battery, so that the performance of the battery can be improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and it is obvious for a person skilled in the art to obtain other drawings based on the drawings without any creative effort.
FIG. 1 is a schematic illustration of a vehicle according to an embodiment of the present application;
FIG. 2 is a schematic diagram of a battery according to an embodiment of the present application;
FIG. 3 is a schematic diagram of a battery cell according to an embodiment of the present application;
FIG. 4 is a schematic diagram of a battery according to an embodiment of the present application;
FIG. 5 is a schematic view of a battery cell in connection with a thermal management component according to an embodiment of the present application;
FIG. 6 is a cross-sectional view taken along A-A of FIG. 5;
FIG. 7 is an enlarged schematic view of region B of FIG. 6;
FIG. 8 is a schematic diagram of a battery according to an embodiment of the present application;
fig. 9 is a schematic view of a method of manufacturing a battery according to an embodiment of the present application;
fig. 10 is a schematic view of an apparatus for manufacturing a battery according to an embodiment of the present application.
In the drawings, the drawings are not necessarily to scale.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings. The following detailed description of the embodiments and the accompanying drawings are provided to illustrate the principles of the application and are not intended to limit the scope of the application, i.e., the application is not limited to the described embodiments.
In the description of the present application, it is to be noted that, unless otherwise specified, all technical and scientific terms used have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terminology used is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "including" and "having," and any variations thereof, in the description and claims of this application and the description of the above figures, are intended to cover non-exclusive inclusions; "plurality" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," and the like, indicate an orientation or positional relationship that is merely for convenience in describing the application and to simplify the description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the application. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. "vertical" is not strictly vertical, but is within the tolerance of the error. "parallel" is not strictly parallel but within the tolerance of the error.
Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the specification. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
The following description is given with the directional terms as they are used in the drawings and not intended to limit the specific structure of the present application. In the description of the present application, it should also be noted that, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly and include, for example, fixed and removable connections as well as integral connections; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
The term "and/or" in this application is only one kind of association relationship describing the associated object, and means that there may be three kinds of relationships, for example, a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" in this application generally indicates that the former and latter related objects are in an "or" relationship.
In the present application, the battery cell may include a lithium ion secondary battery, a lithium ion primary battery, a lithium sulfur battery, a sodium lithium ion battery, a sodium ion battery, a magnesium ion battery, or the like, which is not limited in the embodiments of the present application. The battery cell may be a cylinder, a flat body, a rectangular parallelepiped, or other shapes, which is not limited in the embodiments of the present application. The battery cells are generally divided into three types in a packaging manner: the cylindrical battery monomer, the square battery monomer and the soft package battery monomer are not limited in the embodiment of the application.
Reference to a battery in embodiments of the present application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery referred to in the present application may include a battery pack and the like. Batteries generally include a case for enclosing one or more battery cells. The box can avoid liquid or other foreign matters to influence the charge or discharge of battery cells.
The battery monomer comprises an electrode assembly and electrolyte, wherein the electrode assembly comprises a positive plate, a negative plate and an isolating membrane. The battery cell mainly depends on metal ions moving between the positive plate and the negative plate to work. The positive plate comprises a positive current collector and a positive active substance layer, wherein the positive active substance layer is coated on the surface of the positive current collector, the current collector which is not coated with the positive active substance layer protrudes out of the current collector which is coated with the positive active substance layer, and the current collector which is not coated with the positive active substance layer is used as a positive electrode lug. Taking a lithium ion battery as an example, the material of the positive electrode current collector may be aluminum, and the positive electrode active material may be lithium cobaltate, lithium iron phosphate, ternary lithium, lithium manganate, or the like. The negative pole piece includes negative current collector and negative pole active substance layer, and the negative pole active substance layer coats in the surface of negative current collector, and the mass flow body protrusion in the mass flow body of coating the negative pole active substance layer of uncoated negative pole active substance layer, the mass flow body of uncoated negative pole active substance layer is as negative pole utmost point ear. The material of the negative electrode current collector may be copper, and the negative electrode active material may be carbon, silicon, or the like. In order to ensure that the fuse is not fused when a large current is passed, the number of the positive electrode tabs is multiple and the positive electrode tabs are stacked together, and the number of the negative electrode tabs is multiple and the negative electrode tabs are stacked together. The material of the isolation film can be polypropylene (PP), Polyethylene (PE) or the like. In addition, the electrode assembly may have a winding structure or a lamination structure, and the embodiment of the present application is not limited thereto.
In order to meet different power requirements, a battery may include a plurality of battery cells, wherein the plurality of battery cells may be connected in series or in parallel or in series-parallel, and the series-parallel refers to a mixture of series connection and parallel connection. Alternatively, a plurality of battery cells may be connected in series or in parallel or in series-parallel to form a battery module, and a plurality of battery modules may be connected in series or in parallel or in series-parallel to form a battery. That is, a plurality of battery cells may directly constitute a battery, or a battery module may be first constituted and then a battery may be constituted. The battery is further arranged in the electric equipment to provide electric energy for the electric equipment.
The development of battery technology should take into consideration various design factors such as energy density, cycle life, discharge capacity, charge and discharge rate, safety, etc. Under the condition that the internal space of the battery is fixed, the utilization rate of the internal space of the battery is improved, and the method is an effective means for improving the energy density of the battery. However, while the utilization rate of the internal space of the battery is improved, other performance parameters of the battery, such as the thermal management of the battery, etc., are also considered.
During the charging and discharging process of the battery, a large amount of heat can be generated, particularly during the quick charging process, a large amount of heat can be generated by the battery monomer, and the heat is accumulated and superposed continuously, so that the temperature of the battery is increased sharply. When the heat of the battery cell cannot be timely dissipated, thermal runaway of the battery can be caused, and safety accidents such as smoking, fire, explosion and the like occur. Meanwhile, long-term severe temperature non-uniformity may greatly reduce the service life of the battery. In addition, when the temperature is low, the discharge efficiency of the battery is low, and even the battery is difficult to start at low temperature, which affects the normal use of the battery. Therefore, how to guarantee the battery is critical to the need for thermal management.
In view of this, the present embodiment provides a solution, in a battery, a thermal management component is provided to be connected to a first wall having a largest surface area of each of a row of a plurality of battery cells arranged in a first direction, wherein, in a second direction, a dimension H1 of the thermal management component and a dimension H2 of the first wall satisfy: H1/H2 is more than or equal to 0.1 and less than or equal to 2, and the second direction is vertical to the first direction and is parallel to the first wall. Like this, the box middle part of battery can not need to set up roof beam isotructure again, can promote the inside space utilization of battery by great limit to promote the energy density of battery. Meanwhile, the temperature of the battery cells can be managed by the thermal management component. Therefore, the technical scheme of the embodiment of the application can meet the thermal management requirement of the battery by improving the energy density of the battery, so that the performance of the battery can be improved.
The technical scheme described in the embodiment of the application is applicable to various devices using batteries, such as mobile phones, portable devices, notebook computers, battery cars, electric toys, electric tools, electric vehicles, ships, spacecrafts and the like, and the spacecrafts comprise airplanes, rockets, space shuttles, spacecrafts and the like.
It should be understood that the technical solutions described in the embodiments of the present application are not limited to be applied to the above-described devices, but may also be applied to all devices using batteries, and for brevity of description, the following embodiments are all described by taking an electric vehicle as an example.
For example, as shown in fig. 1, which is a schematic structural diagram of a vehicle 1 according to an embodiment of the present disclosure, the vehicle 1 may be a fuel automobile, a gas automobile, or a new energy automobile, and the new energy automobile may be a pure electric automobile, a hybrid electric automobile, or an extended range automobile. The vehicle 1 may be provided with a motor 40, a controller 30 and a battery 10, the controller 30 being configured to control the battery 10 to supply power to the motor 40. For example, the battery 10 may be provided at the bottom or the head or tail of the vehicle 1. The battery 10 may be used for power supply of the vehicle 1, for example, the battery 10 may be used as an operation power supply of the vehicle 1 for a circuit system of the vehicle 1, for example, for power demand for operation at the start, navigation, and running of the vehicle 1. In another embodiment of the present application, the battery 10 may be used not only as an operation power source of the vehicle 1 but also as a driving power source of the vehicle 1 instead of or in part of fuel or natural gas to provide driving power to the vehicle 1.
In order to meet different power usage requirements, the battery 10 may include a plurality of battery cells. For example, as shown in fig. 2, the battery 10 may include a plurality of battery cells 20 for a structural schematic diagram of the battery 10 according to an embodiment of the present disclosure. The battery 10 may further include a case 11, the inside of the case 11 is a hollow structure, and the plurality of battery cells 20 are accommodated in the case 11. For example, a plurality of battery cells 20 are disposed in the case 11 in parallel or in series or in a combination of series and parallel.
Optionally, the battery 10 may also include other structures, which are not described in detail herein. For example, the battery 10 may further include a bus member for electrically connecting the plurality of battery cells 20, such as in parallel or in series-parallel. Specifically, the bus member may achieve electrical connection between the battery cells 20 by connecting electrode terminals of the battery cells 20. Further, the bus bar member may be fixed to the electrode terminals of the battery cells 20 by welding. The electric energy of the plurality of battery cells 20 can be further led out through the box body by the conductive mechanism. Alternatively, the conductive means may also belong to the bus bar member.
The number of the battery cells 20 may be set to any number according to different power requirements. A plurality of battery cells 20 may be connected in series, parallel, or series-parallel to achieve greater capacity or power. Since the number of the battery cells 20 included in each battery 10 may be large, the battery cells 20 may be arranged in groups for convenience of installation, each group of the battery cells 20 constituting a battery module. The number of the battery cells 20 included in the battery module is not limited and may be set as required. The battery may include a plurality of battery modules, which may be connected in series, parallel, or series-parallel.
As shown in fig. 3, which is a schematic structural diagram of a battery cell 20 according to an embodiment of the present disclosure, the battery cell 20 includes one or more electrode assemblies 22, a case 211, and a cover plate 212. The housing 211 and cover 212 form a housing or battery compartment 21. The walls of the housing 211 and the cover plate 212 are referred to as the walls of the battery cell 20, wherein for the cuboid battery cell 20, the walls of the housing 211 include a bottom wall and four side walls. The case 211 is determined according to the shape of one or more electrode assemblies 22 after being combined, for example, the case 211 may be a hollow rectangular parallelepiped or a square or a cylinder, and one of the faces of the case 211 has an opening so that one or more electrode assemblies 22 can be placed in the case 211. For example, when the housing 211 is a hollow rectangular parallelepiped or square, one of the planes of the housing 211 is an open plane, i.e., the plane has no wall body so that the housing 211 communicates inside and outside. When the housing 211 may be a hollow cylinder, the end surface of the housing 211 is an open surface, i.e., the end surface has no wall body so that the housing 211 is communicated with the inside and the outside. The cap plate 212 covers the opening and is connected with the case 211 to form a closed cavity in which the electrode assembly 22 is placed. The case 211 is filled with an electrolyte, such as an electrolytic solution.
The battery cell 20 may further include two electrode terminals 214, and the two electrode terminals 214 may be disposed on the cap plate 212. The cap plate 212 is generally in the shape of a flat plate, and two electrode terminals 214 are fixed to the flat plate surface of the cap plate 212, the two electrode terminals 214 being a positive electrode terminal 214a and a negative electrode terminal 214b, respectively. One connecting member 23, which may also be referred to as a current collecting member 23, is disposed at each of the electrode terminals 214, between the cap plate 212 and the electrode assembly 22, for electrically connecting the electrode assembly 22 and the electrode terminals 214.
As shown in fig. 3, each electrode assembly 22 has a first tab 221a and a second tab 222 a. The first tab 221a and the second tab 222a have opposite polarities. For example, when the first tab 221a is a positive electrode tab, the second tab 222a is a negative electrode tab. The first tab 221a of one or more electrode assemblies 22 is connected to one electrode terminal by one connecting member 23, and the second tab 222a of one or more electrode assemblies 22 is connected to another electrode terminal by another connecting member 23. For example, the positive electrode terminal 214a is connected to a positive electrode tab through one connecting member 23, and the negative electrode terminal 214b is connected to a negative electrode tab through the other connecting member 23.
In the battery cell 20, the electrode assembly 22 may be provided singly or in plurality according to actual use requirements, and as shown in fig. 3, 4 independent electrode assemblies 22 are provided in the battery cell 20.
The battery cell 20 may further include a pressure relief mechanism 213. The pressure relief mechanism 213 is actuated to relieve the internal pressure or temperature of the battery cell 20 when the internal pressure or temperature reaches a threshold value.
The pressure relief mechanism 213 may be any of various possible pressure relief structures, which are not limited in the embodiments of the present application. For example, the pressure relief mechanism 213 may be a temperature-sensitive pressure relief mechanism configured to be able to melt when the internal temperature of the battery cell 20 provided with the pressure relief mechanism 213 reaches a threshold value; and/or, pressure relief mechanism 213 may be a pressure sensitive pressure relief mechanism configured to rupture when the internal air pressure of cell 20 in which pressure relief mechanism 213 is disposed reaches a threshold.
Fig. 4 is a schematic structural diagram of a battery according to an embodiment of the present application. As shown in fig. 4, the battery 10 includes a plurality of battery cells 20 arranged in a first direction and a thermal management member 101. The thermal management member 101 extends in a first direction and is connected to a first wall 20a of each of the plurality of battery cells 20, the first wall 20a being a wall having a largest surface area in the battery cell 20, the thermal management member 101 being configured to regulate a temperature of the battery cell 20; wherein, in the second direction, the dimension H1 of the thermal management component 101 and the dimension H2 of the first wall 20a satisfy: 0.1 ≦ H1/H2 ≦ 2, and the second direction perpendicular to the first direction and parallel to the first wall 20 a.
The thermal management member 101 and the plurality of battery cells 20 each extend in a first direction, for example, in the x-direction, and the thermal management member 101 is connected to the first wall 20a of each battery cell 20 in a column of battery cells 20. The second direction is perpendicular to the first direction and parallel to the first wall 20a, wherein the second direction may be the z-direction.
In the second direction, the dimension H1 of the thermal management component 101 may be the height of the thermal management component 101 and the dimension H2 of the first wall 20a may be the height of the first wall 20 a. The relation between H1 and H2 satisfies: H1/H2 is more than or equal to 0.1 and less than or equal to 2.
When H1/H2 is less than 0.1, the heat exchange area between the battery cell 20 and the heat management component 101 is small, the battery cell 20 cannot be cooled or heated in time, and the heat management requirement of the battery is difficult to meet.
When H1/H2 > 2, the requirement of thermal management of the battery can be satisfied, but the thermal management component 101 occupies more space, and the space utilization rate in the second direction is wasted, so that the requirement of the battery on the energy density is difficult to guarantee.
Alternatively, the thermal management component 101 may be a water-cooled plate for cooling the battery cell 20 during a fast charge process or heating the battery cell 20 when the temperature is too low.
Alternatively, the thermal management component 101 may be made of a material with good thermal conductivity, such as a metal material, e.g., aluminum.
In the embodiment of the present application, the heat management member 101 is provided in the battery 10 to be connected to the first wall 20a having the largest surface area of each of the plurality of battery cells 20 arranged in the row in the first direction, wherein, in the second direction, the dimension H1 of the heat management member 101 and the dimension H2 of the first wall 20a satisfy: H1/H2 is more than or equal to 0.1 and less than or equal to 2, and the second direction is vertical to the first direction and parallel to the first wall 20 a. Therefore, the middle part of the box body of the battery 10 does not need to be provided with a beam and other structures, and the space utilization rate inside the battery 10 can be improved to a greater extent, so that the energy density of the battery 10 is improved. Meanwhile, the temperature of the battery cell 20 may also be managed using the above-described heat management part 101. Therefore, the technical solution of the embodiment of the present application can improve the energy density of the battery 10 and meet the thermal management requirement of the battery 10, so as to improve the performance of the battery 10.
Optionally, in an embodiment of the present application, the dimension H1 of the thermal management component 101 and the dimension H2 of the first wall 20a further satisfy: H1/H2 is more than or equal to 0.3 and less than or equal to 1.3. In this way, it is ensured that the temperature of the battery cell 20 does not exceed 55 ℃ during the quick charge.
Optionally, in an embodiment of the present application, a heat exchange area between the first wall 20a and the heat management component 101 is S, and a relationship between the capacity Q of the battery cell 20 and the heat exchange area S satisfies: 0.03Ah/cm2≤Q/S≤6.66Ah/cm2。
The heat exchange area S may be a contact area of the first wall 20a and the first thermal management member 101, and the heat exchange area S satisfies: and S — H1 × W, where W is a dimension of each cell 20 in the first direction.
When Q/S is less than 0.03Ah/cm2In the meantime, the heat exchange area S is large enough to meet the requirement of the battery for heat management, but at this time, the occupied space of the heat management component 101 is too large to meet the requirement of the energy density of the battery 10.
When Q/S is more than 6.66Ah/cm2When the heat exchange area S is small, the heat of the battery cell 20 is smallThe amount cannot be timely exported through the thermal management component 101, the battery cell 20 cannot be timely and rapidly cooled, and the thermal management requirement cannot be met.
By adjusting the relationship between the heat exchange area S and the capacity Q of the battery cell 20, the temperature of the battery cell 20 can be maintained in a suitable range during the charging process of the battery, particularly during the rapid charging process; in addition, when the capacity Q of the battery monomer is fixed, the heat exchange area S can be adjusted, and the heat management requirement of the battery can be flexibly met.
In one possible implementation, the dimension H1 of the thermal management component is 1.5cm to 30 cm. Therefore, the temperature of the battery monomer can be ensured not to exceed 55 ℃ in the process of quick charging of the battery.
Fig. 5 is a schematic view of a battery cell according to an embodiment of the present application connected to a thermal management member, fig. 6 is a sectional view taken along a-a direction of fig. 5, and fig. 7 is an enlarged schematic view of a region B of fig. 6. Optionally, in an embodiment of the present application, in conjunction with fig. 5 to 7, the thermal management component 101 includes a first heat-conducting plate 1011 and a second heat-conducting plate 1012 arranged opposite to each other in a third direction; wherein, a flow channel 104 is disposed between the first heat conducting plate 1011 and the second heat conducting plate 1012, the flow channel 104 is used for accommodating a fluid for adjusting the temperature of the battery cell 20, and the third direction is perpendicular to the first direction and the second direction.
The first and second heat conduction plates 1011 and 1012 are oppositely disposed in a third direction, which may be the y direction, and form the flow passage 104. The first heat conduction plate 1011 and the second heat conduction plate 1012 may be made of a material having a good heat conduction property, for example, a metal material such as aluminum.
In the third direction, only one side of a column of battery cells 20 arranged along the first direction may be connected to the thermal management component 101, or both sides of the column of battery cells 20 may be connected to the thermal management component 101, which is not limited in this embodiment of the present application.
Optionally, the length of the thermal management component 101 in the first direction is equal to the sum of the lengths of all the battery cells 20 in the same column, so that the battery cells 20 can be sufficiently cooled while reducing the space occupied by the thermal management component 101. In other embodiments, the length of the thermal management component 101 may be less than or equal to the sum of the lengths of all the battery cells 20, and may be specifically set according to actual requirements, which is not limited in this embodiment of the present application.
Optionally, in an embodiment of the present application, the thermal management component 101 further includes a reinforcing rib 1013, the reinforcing rib 1013 is disposed between the first heat-conducting plate 1011 and the second heat-conducting plate 1012, and the reinforcing rib 1013, the first heat-conducting plate 1011 and the second heat-conducting plate 1012 form the flow channel 104. In this way, the structural strength of the thermal management component 101 may be enhanced.
Alternatively, the number of the ribs 1013 is one, so that one or two flow passages 104 may be formed between the first heat conduction plate 1011 and the second heat conduction plate 1012. When the reinforcing rib 1013 is connected to only the first heat conducting plate 1011 or the second heat conducting plate 1012, the reinforcing rib 1013 is a cantilever having one end connected to the heat conducting plate in the third direction, and at this time, only one flow channel 104 is formed; when the reinforcing rib 1013 is connected to the first heat-conducting plate 1011 and the second heat-conducting plate 1012, two flow passages 104 are formed. The number of the ribs 1013 may be specifically set according to the requirement, and the embodiment of the present application does not limit this.
Optionally, when the number of the flow passages 104 is multiple, different flow passages 104 may be independent from each other, or may be communicated through an adapter.
Optionally, the stiffener 1013 extends in a first direction, that is, the stiffener forms a right angle with the first conductive plate 1011 or the second conductive plate 1012.
Optionally, in an embodiment of the present application, the angle between the stiffener 1013 and the first heat-conducting plate 1011 or the second heat-conducting plate 1012 is an acute angle. In this way, more expansion space can be provided for the battery cell 20.
Alternatively, in an embodiment of the present application, the battery cell 20 includes two first walls 20a disposed opposite to each other in the second direction and two second walls 20b disposed opposite to each other in the first direction, wherein the second walls 20b of two adjacent battery cells 20 are opposite to each other in the first direction. For example, the battery cell 20 includes a first wall 20a, a second wall 20b, and third walls, the first wall 20a, the second wall 20b, and the third walls being adjacent to each other, wherein the surface area of the first wall 20a is larger than the surface area of the second wall 20b, one of the two third walls is disposed away from the bottom of the case as a top surface of the battery cell, and the other is disposed toward the bottom of the case as a bottom surface of the battery cell.
Fig. 8 is a schematic structural diagram of a battery according to an embodiment of the present application. Alternatively, in an embodiment of the present application, as shown in fig. 8, the battery 10 includes a plurality of rows of the plurality of battery cells 20 arranged in the first direction and the plurality of thermal management components 101, wherein the plurality of rows of the battery cells 20 and the plurality of thermal management components 101 are alternately arranged in a third direction, and the third direction is perpendicular to the first direction and the second direction. Like this, multiseriate battery monomer 20 and a plurality of thermal management part 101 interconnect form a whole, hold in the box, can enough carry out effectual thermal management to each battery monomer 20, can guarantee the holistic structural strength of battery again to can promote the performance of battery.
The battery 10 includes a case 11, a plurality of rows of battery cells 20, and a plurality of heat management members 101, a duct 103, and a current collector 102. The current collector 102 and the pipe 103 are disposed at both ends of the thermal management member 101 in the first direction, and the fluid is transferred to the current collector 102 via the pipe 103, and then collected by the current collector 102 and transferred to the thermal management member 101, thereby cooling or heating the battery cell 20.
The plurality of rows of battery cells 20 and the plurality of heat management parts 101 are alternately arranged in the second direction, wherein the battery cells may be arranged in a battery cell-heat management part-battery cell manner or in a heat management part-battery cell-heat management part manner along the second direction. In the former arrangement, the number of rows of the battery cells 20 is N, the number of the thermal management members 101 is N-1, and the energy density of the battery 10 is higher. In the latter arrangement, the number of rows of the battery cells 20 is N, and the number of the thermal management members 101 is N +1, so that the thermal management performance of the battery 10 is better and the cooling speed of the battery cells 20 is faster. The two arrangement modes can timely cool the single battery 20 on the premise of ensuring the energy density of the battery 10, and effectively prevent the single battery 20 from generating thermal runaway due to overhigh temperature.
Alternatively, in the battery 10, the thermal management member may be arranged in a manner of battery cell-thermal management member, as long as cooling or heating of the first wall 20a of the battery cell 20 can be achieved, which is not limited by the embodiment of the present application.
Optionally, in an embodiment of the present application, the thermal management component 101 is bonded to the first wall 20 a. In this way, the strength of the connection between the thermal management member 101 and the first wall 20a is increased.
Alternatively, the thermal management member 101 may also be sandwiched between the battery cells 20 of the adjacent rows or the side walls of the case 11 and the battery cells 20 by abutting against the first wall 20 a.
It should be understood that relevant portions in the embodiments of the present application may be mutually referred, and are not described again for brevity.
An embodiment of the present application further provides a power consumption device, which may include the battery 10 in the foregoing embodiment. Optionally, the electric device may be a vehicle 1, a ship, a spacecraft, or the like, but the embodiment of the present application is not limited thereto.
The battery 10 and the electric device according to the embodiment of the present application are described above, and the method and the device for manufacturing the battery according to the embodiment of the present application are described below, wherein the parts not described in detail can be referred to the foregoing embodiments.
Fig. 9 shows a schematic flow diagram of a method 300 of preparing a battery according to an embodiment of the present application. As shown in fig. 9, the method 300 may include:
310 providing a plurality of battery cells 20 arranged in a first direction;
a heat management member 101, the heat management member 101 extending in a first direction and being connected to a first wall 20a of each of the plurality of battery cells 20, the first wall 20a being a wall having a largest surface area in the battery cell 20, the heat management member 101 being configured to regulate a temperature of the battery cell 20; wherein, in the second direction, the dimension H1 of the thermal management component 101 and the dimension H2 of the first wall 20a satisfy: 0.1 ≦ H1/H2 ≦ 2, and the second direction perpendicular to the first direction and parallel to the first wall 20 a.
Fig. 10 shows a schematic block diagram of an apparatus 400 for preparing a battery according to an embodiment of the present application. As shown in fig. 10, the apparatus 400 for preparing a battery may include: a first providing module 410 and a second providing module 420.
The first providing module 410 is used for providing a plurality of battery cells 20 arranged in a first direction.
The second providing module 420 is configured to provide a thermal management member 101, the thermal management member 101 extends in a first direction and is connected to a first wall 20a of each of the plurality of battery cells 20, the first wall 20a is a wall having a largest surface area in the battery cell 20, and the thermal management member 101 is configured to regulate the temperature of the battery cell 20; wherein, in the second direction, the dimension H1 of the thermal management component 101 and the dimension H2 of the first wall 20a satisfy: 0.1 ≦ H1/H2 ≦ 2, and the second direction perpendicular to the first direction and parallel to the first wall 20 a.
Hereinafter, examples of the present application will be described. The following description of the embodiments is merely exemplary in nature and is in no way intended to limit the present disclosure. The examples, where specific techniques or conditions are not indicated, are to be construed according to the techniques or conditions described in the literature in the art or according to the product specifications.
The batteries were subjected to a charge test, and the test results are shown in table 1.
Table 1 temperature testing during charging of different sized battery cells and thermal management components
While the application has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the application. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present application is not intended to be limited to the particular embodiments disclosed herein but is to cover all embodiments that may fall within the scope of the appended claims.
Claims (11)
1. A battery (10), comprising:
a plurality of battery cells (20) arranged in a first direction;
a thermal management member (101), the thermal management member (101) extending in the first direction and being connected to a first wall (20a) of each battery cell (20) of the plurality of battery cells (20), the first wall (20a) being a wall having a largest surface area in the battery cell (20), the thermal management member (101) being configured to regulate a temperature of the battery cell (20);
wherein, in a second direction, the dimension H1 of the thermal management component (101) and the dimension H2 of the first wall (20a) satisfy: 0.1 ≦ H1/H2 ≦ 2, the second direction being perpendicular to the first direction and parallel to the first wall (20 a).
2. The battery (10) of claim 1, wherein the dimension H1 of the thermal management component (101) and the dimension H2 of the first wall (20a) further satisfy: H1/H2 is more than or equal to 0.3 and less than or equal to 1.3.
3. The battery (10) according to claim 1, wherein a heat exchange area between the first wall (20a) and the heat management member (101) is S, and a relationship between a capacity Q of the battery cell (20) and the heat exchange area S satisfies: 0.03Ah/cm2≤Q/S≤6.66Ah/cm2。
4. The battery (10) of claim 1, wherein the thermal management component (101) has a dimension H1 of 1.5cm to 30 cm.
5. The battery (10) of claim 1, wherein the thermal management component (101) comprises a first thermally conductive plate (1011) and a second thermally conductive plate (1012) disposed opposite in a third direction;
wherein, be provided with runner (104) between first heat-conducting plate (1011) and second heat-conducting plate (1012), runner (104) are used for holding the fluid of adjusting the temperature of battery monomer (20), the third direction is perpendicular to first direction with the second direction.
6. The battery (10) of claim 5, wherein the thermal management component (101) further comprises a stiffener (1013), the stiffener (1013) disposed between the first thermally conductive plate (1011) and the second thermally conductive plate (1012), the stiffener (1013), the first thermally conductive plate (1011), and the second thermally conductive plate (1012) forming the flow channel (104).
7. The battery (10) of claim 6, wherein the angle of the stiffener (1013) with the first heat-conducting plate (1011) or the second heat-conducting plate (1012) is acute.
8. The battery (10) according to claim 1, wherein the battery cell (20) comprises two first walls (20a) oppositely disposed in a third direction and two second walls (20b) oppositely disposed in the first direction, wherein the second walls (20b) of two adjacent battery cells (20) are opposite in the first direction, and the third direction is perpendicular to the first direction and the second direction.
9. The battery (10) according to claim 1, wherein the battery (10) comprises a plurality of rows of the plurality of battery cells (20) and the plurality of thermal management members (101) arranged in the first direction, wherein the plurality of rows of the battery cells (20) and the plurality of thermal management members (101) are alternately arranged in a third direction, the third direction being perpendicular to the first direction and the second direction.
10. The battery (10) according to any one of claims 1 to 9, wherein the thermal management member (101) is bonded to the first wall (20 a).
11. An electrical device, comprising: the battery (10) according to any one of claims 1 to 10, the battery (10) being for providing electrical energy.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220351344.7U CN216872114U (en) | 2022-02-21 | 2022-02-21 | Battery and electric equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220351344.7U CN216872114U (en) | 2022-02-21 | 2022-02-21 | Battery and electric equipment |
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| CN216872114U true CN216872114U (en) | 2022-07-01 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116130835A (en) * | 2023-04-17 | 2023-05-16 | 宁德时代新能源科技股份有限公司 | Battery and electric equipment |
| WO2024016329A1 (en) * | 2022-07-22 | 2024-01-25 | 宁德时代新能源科技股份有限公司 | Battery and electric device |
| WO2024031413A1 (en) * | 2022-08-10 | 2024-02-15 | 宁德时代新能源科技股份有限公司 | Battery and electrical device |
| WO2024031418A1 (en) * | 2022-08-10 | 2024-02-15 | 宁德时代新能源科技股份有限公司 | Battery, electric device, and forming method for battery |
| WO2024077633A1 (en) * | 2022-10-14 | 2024-04-18 | 宁德时代新能源科技股份有限公司 | Battery and electric device |
| WO2024077631A1 (en) * | 2022-10-14 | 2024-04-18 | 宁德时代新能源科技股份有限公司 | Battery and electric device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2024016329A1 (en) * | 2022-07-22 | 2024-01-25 | 宁德时代新能源科技股份有限公司 | Battery and electric device |
| WO2024031413A1 (en) * | 2022-08-10 | 2024-02-15 | 宁德时代新能源科技股份有限公司 | Battery and electrical device |
| WO2024031418A1 (en) * | 2022-08-10 | 2024-02-15 | 宁德时代新能源科技股份有限公司 | Battery, electric device, and forming method for battery |
| WO2024077633A1 (en) * | 2022-10-14 | 2024-04-18 | 宁德时代新能源科技股份有限公司 | Battery and electric device |
| WO2024077631A1 (en) * | 2022-10-14 | 2024-04-18 | 宁德时代新能源科技股份有限公司 | Battery and electric device |
| CN116130835A (en) * | 2023-04-17 | 2023-05-16 | 宁德时代新能源科技股份有限公司 | Battery and electric equipment |
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