Battery, power-consuming device and device for manufacturing a battery

Abstract

Battery (10), characterized in that it comprises the following: several battery cells (20) arranged along a first direction; a thermal management component (101), wherein the thermal management component (101) extends along the first direction and is connected to a first wall (20a) of each battery cell (20) of the multiple battery cells (20), wherein the first wall (20a) is the wall with the largest surface area in the battery cell (20) and the thermal management component (101) serves to control the temperature of the battery cells (20); wherein in a second direction a dimension H1 of the thermal management component (101) and a dimension H2 of the first wall (20a) satisfy the following condition: 0.1 ≤ H1 / H2 ≤ 2, and the second direction is perpendicular to the first direction and parallel to the first wall (20a).

Description

Technical field

[0001] The present application relates to the field of battery technology, in particular a battery, a power-consuming device, and a method and apparatus for manufacturing a battery. State of the art

[0002] With increasing environmental pollution, the renewable energy sector is gaining more and more attention. Battery technology represents a crucial factor in the development of this sector.

[0003] A battery's energy density is a crucial parameter for its performance. However, increasing a battery's energy density also requires considering other performance parameters. Therefore, improving battery performance represents a pressing technical challenge in battery technology. Disclosure of the invention

[0004] The present application provides a battery, a power-consuming device, and a method and apparatus for manufacturing a battery, which are capable of ensuring the thermal management requirements in the battery while simultaneously increasing the energy density of the battery and thus improving the battery's performance.

[0005] According to a first aspect, a battery is provided comprising: several battery cells arranged along a first direction; a thermal management component, wherein the thermal management component extends along the first direction and is connected to a first wall of each of the several battery cells, the first wall being the wall with the largest surface area in the battery cell and the thermal management component serving to control the temperature of the battery cells; wherein, in a second direction, a dimension H1 of the thermal management component and a dimension H2 of the first wall satisfy the following condition: 0.1 ≤ H1 / H2 ≤ 2, the second direction being perpendicular to the first direction and parallel to the first wall.

[0006] In the embodiments of the present application, the thermal management component is connected to the first wall with the largest surface area in each of the multiple battery cells arranged in a row along the first direction, wherein, in the second direction, the dimension H1 of the thermal management component and the dimension H2 of the first wall satisfy the following condition: 0.1 ≤ H1 / H2 ≤ 2. This eliminates the need for a structure such as beams in the central part of the battery's casing, thereby maximizing the space utilization inside the battery and thus increasing its energy density. Simultaneously, the use of the aforementioned thermal management component ensures compliance with the thermal management requirements within the battery.Therefore, the technical solutions of the embodiments of the application enable the requirements for thermal management in the battery to be met while simultaneously increasing the energy density of the battery and thus improving the battery's performance.

[0007] In one possible implementation, the dimension H1 of the thermal management component and the dimension H2 of the first wall further satisfy the following condition: 0.3 ≤ H1 / H2 ≤ 1.3. In this way, it can be ensured that the temperature of the battery cell does not exceed 55 °C during the battery charging process, especially during fast charging.

[0008] In one possible implementation, a heat exchange surface S is present between the first wall and the thermal management component, where the relationship between a battery cell capacity Q and the heat exchange surface S satisfies the following condition: 0.03 Ah / cm² 2 ≤ Q / S ≤ 6.66 Ah / cm 2In this way, the temperature of the battery cell can be kept within a suitable range during the fast charging process. Furthermore, for a given battery cell capacity Q, the requirements for the battery's thermal management can be flexibly met by adjusting the heat exchange surface S.

[0009] In one possible implementation, the dimension H1 of the thermal management component ranges from 1.5 cm to 30 cm. This ensures that the temperature of the battery cell does not exceed 55 °C during the battery's fast charging process.

[0010] In one possible implementation, the thermal management component comprises a first heat-conducting plate and a second heat-conducting plate arranged opposite each other in a third direction, wherein a flow channel is arranged between the first heat-conducting plate and the second heat-conducting plate, the flow channel being used to receive a fluid for temperature control of the battery cells, and the third direction being perpendicular to the first direction and the second direction.

[0011] In one possible implementation, the thermal management component also includes a stiffening rib, which is positioned between the first and second heat-conducting plates, with the stiffening rib, the first heat-conducting plate, and the second heat-conducting plate forming the flow channel. This increases the structural strength of the thermal management component.

[0012] In one possible implementation, the angle between the stiffening rib and either the first or second heat-conducting plate is acute. This allows the thermal management component to have a larger compression space in the third direction, thus providing a larger expansion space for the battery cell.

[0013] In one possible implementation, the battery cell comprises two first walls arranged opposite each other in the third direction and two second walls arranged opposite each other in the first direction. In the first direction, the second walls of two adjacent battery cells are arranged opposite each other, and the third direction is perpendicular to both the first and second directions. In this way, the connection of a large-area first wall with the thermal management component facilitates heat exchange between the battery cells and ensures battery performance.

[0014] In one possible implementation, the battery comprises multiple rows of battery cells arranged along the first direction and multiple thermal management components. In the third direction, the multiple rows of battery cells and the multiple thermal management components are arranged alternately, with the third direction perpendicular to the first and second directions. In this way, the multiple rows of battery cells and the multiple thermal management components are interconnected and form a unit housed within the box-like structure. This enables effective thermal management for each row of battery cells while ensuring the overall structural strength of the battery, thereby improving its performance.

[0015] In one possible implementation, the thermal management component is bonded to the first wall. This increases the bond strength between the thermal management component and the first wall.

[0016] According to a second aspect, a power-consuming device is provided, comprising: a battery according to the first aspect or one of the possible implementations of the first aspect, wherein the battery serves to provide power.

[0017] According to a third aspect, a method for manufacturing a battery is provided, comprising: providing several battery cells arranged along a first direction; providing a thermal management component, wherein the thermal management component extends along the first direction and is connected to a first wall of each of the several battery cells, the first wall being the wall with the largest surface area in the battery cell and the thermal management component serving to control the temperature of the battery cells; wherein, in a second direction, a dimension H1 of the thermal management component and a dimension H2 of the first wall satisfy the following condition: 0.1 ≤ H1 / H2 ≤ 2, the second direction being perpendicular to the first direction and parallel to the first wall.

[0018] According to a fourth aspect, a device for manufacturing a battery is provided, which includes a module for carrying out a process according to the third aspect mentioned above.

[0019] In the embodiments of the present application, the thermal management component is connected to the first wall with the largest surface area in each of the multiple battery cells arranged in a row along the first direction, wherein, in the second direction, the dimension H1 of the thermal management component and the dimension H2 of the first wall satisfy the following condition: 0.1 ≤ H1 / H2 ≤ 2. This eliminates the need for a structure such as beams in the central part of the battery's casing, thereby maximizing the space utilization inside the battery and thus increasing its energy density. Simultaneously, the use of the aforementioned thermal management component ensures compliance with the thermal management requirements within the battery.Therefore, the technical solutions of the embodiments of the application enable the requirements for thermal management in the battery to be met while simultaneously increasing the energy density of the battery and thus improving the battery's performance. Brief description of the drawings

[0020] To better illustrate the technical solutions in the embodiments of the present application, a brief description of the drawings required in these embodiments is given below. Of course, the drawings described below represent only some embodiments of the present application, and other drawings can be created by a person skilled in the art based on these drawings without any creative effort. Fig. Figure 1 is a schematic representation of a vehicle according to an embodiment of the present application; Fig. Figure 2 is a schematic representation of a battery according to an embodiment of the present application; Fig. Figure 3 is a schematic representation of a battery cell according to an embodiment of the present application; Fig. Figure 4 is a schematic representation of a battery according to an embodiment of the present application; Fig. Figure 5 is a schematic representation of the connection of a battery cell with a thermal management component according to an embodiment of the present application; Fig. Figure 6 is a cross-sectional view along the AA direction in Fig. 5; Fig. Figure 7 is an enlarged schematic representation of area B in Fig. 6; Fig. Figure 8 is a schematic representation of a battery according to an embodiment of the present application; Fig. Figure 9 is a schematic representation of a method for manufacturing a battery according to an embodiment of the present application; Fig. Figure 10 is a schematic representation of a device for manufacturing a battery according to an embodiment of the present application.

[0021] The drawings in the figures are not to scale. Detailed descriptions

[0022] The following provides a more detailed description of the embodiments of the present application in conjunction with the drawings and exemplary embodiments. The detailed description of the following exemplary embodiments and the drawings serve to illustrate the principles of the present application by way of example, but should not be interpreted as limiting the scope of the present application. That is to say, the present application is not limited to the described exemplary embodiments.

[0023] In the description of this application, it should be noted that, unless otherwise stated, all technical and scientific terms used herein have the same meanings as they are generally understood by engineers in the technical field to which this application relates. The terms used serve solely to describe specific embodiments and are not intended to limit the scope of this application. The terms "comprise" and "feature," and all variations thereof, as used in the description and claims of this application and in the brief description of the drawings, are intended to cover non-exclusive inclusion. The meaning of "several" is two or more. The terms "above," "below," "left," "right," "inside," "outside," etc., are used in this context.The specified orientation or positional relationship serves only to facilitate the description of the present application and to simplify its description, without indicating or implying that the designated devices or elements must have a specific orientation or be designed and operated in a specific orientation, and therefore is not to be understood as a limitation of the present application. Furthermore, terms such as "first," "second," "third," etc., serve only for descriptive purposes and are not to be interpreted as indicating or implying a relative priority. The term "perpendicular" is not understood in the strict sense as perpendicular, but rather as lying within an acceptable tolerance range. The term "parallel" is not understood in the strict sense as parallel, but rather as lying within an acceptable tolerance range.

[0024] A reference to "embodiment" in the present application means that certain features, structures, or properties described in connection with an embodiment may be included in at least one embodiment of the present application. The appearance of the preceding phrase at various points in the description does not necessarily mean that it refers to the same embodiment, nor does it represent an independent or alternative embodiment that is mutually exclusive with other embodiments. A person skilled in the art understands, expressly and implicitly, that the embodiments described in the present application may be combined with other embodiments.

[0025] The directional terms used in the following description refer to the directions shown in the figures and are not to be understood as limiting the specific structure of the present application. Furthermore, it should be noted in the description of the present application that the terms "assemble," "connect," and "attach" should be interpreted broadly unless expressly stated and defined otherwise. They may, for example, refer to permanent connections, detachable connections, or integral connections; they may mean direct connections or indirect connections via an intermediate medium; and they may include internal communication between two components. The person skilled in the art will be able to understand the specific meaning of the above terms in the present application within the relevant context.

[0026] The term “and / or” in the present application serves only to describe an associative relationship between the associated objects, indicating that three types of relationships can exist, such as A and / or B, which can represent the following three scenarios: A alone, both A and B, and B alone. Furthermore, the symbol “ / ” in the present application generally represents an “or” relationship between the front and back associated objects.

[0027] In the present application, the battery cell may comprise a lithium-ion secondary battery, a lithium-ion primary battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery, or a magnesium-ion battery, etc., without this constituting a limitation of the embodiments of the present application. The battery cell may be cylindrical, flat, cuboid, or have another shape, and the embodiments of the present application are not limited to these. Battery cells are generally divided into three types according to the encapsulation method: cylindrical battery cells, square battery cells, and pouch battery cells, and the embodiments of the present application are not limited to these.

[0028] The battery mentioned in the embodiments of the present application refers to a single physical module comprising one or more battery cells to provide a higher voltage and capacity. For example, the battery mentioned in the present application may comprise a battery pack, etc. A battery generally comprises a housing for enclosing one or more battery cells. The housing can prevent liquids or other foreign matter from interfering with the charging or discharging of the battery cells.

[0029] A battery cell comprises an electrode assembly and an electrolyte solution. The electrode assembly consists of a positive electrode sheet, a negative electrode sheet, and a separator. The battery cell functions primarily through the movement of metal ions between the positive and negative electrode sheets. The positive electrode sheet includes a positive electrode current collector and a positive electrode active layer. The surface of the positive electrode current collector is coated with the positive electrode active layer. The portion of the current collector not coated with the positive electrode active layer protrudes from the coated current collector. This portion of the current collector not coated with the positive electrode active layer serves as the positive electrode tab.Using lithium-ion batteries as an example, the material of the positive electrode current collector can be aluminum, and the positive electrode active substance can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode sheet comprises a negative electrode current collector and a negative electrode active substance layer. The surface of the negative electrode current collector is coated with the negative electrode active substance layer. The portion of the current collector not coated with the negative electrode active substance layer protrudes from the coated current collector. This portion serves as the negative electrode tab. The material of the negative electrode current collector can be copper, and the negative electrode active substance can be carbon or silicon.To ensure that large currents can flow without melting, there are several positive electrode tabs stacked on top of each other, and there are several negative electrode tabs stacked on top of each other. The separator material can be polypropylene (PP) or polyethylene (PE). Furthermore, the electrode arrangement can have a wound or stacked structure, and the embodiments described in this application are not limited to these.

[0030] To meet varying power requirements, a battery can comprise multiple battery cells. These cells can be connected in series, parallel, or a mixed configuration, where a mixed configuration is a combination of series and parallel connections. Optionally, multiple battery cells can first be combined in series, parallel, or a mixed configuration to form a battery module. Multiple battery modules can then be combined in series, parallel, or a mixed configuration to form a battery. In other words, the multiple battery cells can directly form a battery, or they can first form a battery module, which then forms a battery. The battery is then installed in a power-consuming device to supply it with electrical energy.

[0031] Battery technology development requires simultaneous consideration of several design factors, such as energy density, cycle life, discharge capacity, charge and discharge rates, and safety. Increasing space utilization within the battery, given limited internal space, is an effective means of boosting energy density. However, when increasing space utilization, other battery performance parameters, such as thermal management, must also be taken into account.

[0032] A significant amount of heat is generated during the charging and discharging process of a battery. In particular, during fast charging, the battery cells generate a large amount of heat that continuously accumulates and builds up, leading to a steep temperature increase. If this heat cannot be dissipated quickly enough, it can cause thermal runaway, potentially resulting in safety incidents such as smoke, fire, and explosion. Furthermore, prolonged and severe temperature fluctuations can significantly shorten the battery's lifespan. Additionally, at low temperatures, the battery's discharge efficiency is very low, and starting it may even be difficult, impacting its normal operation.Therefore, it is crucial to understand how the battery's thermal management requirements can be met.

[0033] Against this background, the embodiments of the present application provide a technical solution in which a thermal management component is provided in the battery. This component is connected to a first wall with the largest surface area in each of the multiple battery cells arranged in a row along a first direction. In a second direction, a dimension H1 of the thermal management component and a dimension H2 of the first wall satisfy the following condition: 0.1 ≤ H1 / H2 ≤ 2, where the second direction is perpendicular to the first direction and parallel to the first wall. This eliminates the need for structures such as beams in the central part of the battery's casing, thereby maximizing the use of space inside the battery and thus increasing its energy density. Simultaneously, the aforementioned thermal management component can also be used to regulate the temperature of the battery cell.Therefore, the technical solutions of the embodiments of the present application enable the requirements for thermal management in the battery to be met while simultaneously increasing the energy density of the battery and thus improving the battery's performance.

[0034] The technical solutions described in the embodiments of the present application are suitable for various battery-powered devices, such as mobile phones, portable devices, laptops, electric bicycles, electric toys, power tools, electric vehicles, ships, and spacecraft. Spacecraft include, for example, airplanes, rockets, space shuttles, and spacecraft.

[0035] It should be understood that the technical solutions described in the embodiments of this application are not limited to the devices described above, but can be applied to all devices that use batteries. For the sake of simplicity, only electric vehicles are used as examples in the following embodiments.

[0036] For example, it shows Fig. Figure 1 shows a schematic representation of the structure of a vehicle 1 according to an embodiment of the present application. The vehicle 1 can be a fuel-powered vehicle, a gas-powered vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle, a range-extender vehicle, etc. The vehicle 1 can be equipped with a motor 40, a control unit 30, and a battery 10. The control unit 30 serves to regulate the power supply to the motor 40 from the battery 10. For example, the battery 10 can be located in the floor area, at the front, or at the rear of the vehicle 1. The battery 10 can be used to supply power to the vehicle 1. For example, the battery 10 can be used as an operating current source for the vehicle 1 in the vehicle 1's circuit system, for instance, to meet the power requirements of the vehicle 1 during starting, navigation, and operation.In a further embodiment of the present application, the battery 10 can serve not only as an operating current source for the vehicle 1, but also as a drive current source for the vehicle 1, replacing fuel or natural gas wholly or partially to provide the drive of the vehicle 1.

[0037] To meet varying power requirements, the battery can comprise 10 multiple battery cells. For example, it shows Fig. Figure 2 shows a schematic representation of the structure of a battery 10 according to an embodiment of the present application. The battery 10 can comprise several battery cells 20. The battery 10 can also comprise a box body 11, the interior of which has a hollow structure and the several battery cells 20 are contained within the box body 11. For example, the several battery cells 20 can be combined in parallel, in series, or in a mixed circuit and then contained within the box body 11.

[0038] Optionally, the battery 10 can include other structures that are not described in detail here. For example, the battery 10 can also include a bus component for establishing an electrical connection between the multiple battery cells 20, for example, in parallel, series, or mixed configurations. More precisely, the bus component can establish an electrical connection between the battery cells 20 by connecting it to the electrode terminals of the battery cells 20. Furthermore, the bus component can be attached to the electrode terminals of the battery cells 20 by welding. The electrical energy of the multiple battery cells 20 can also be conducted to the outside through the housing via a conductive mechanism. Optionally, the conductive mechanism can also be part of the bus component.

[0039] Depending on the power requirements, the number of battery cells (20) can be set to any desired value. The multiple battery cells (20) can be connected in series, parallel, or mixed configurations to achieve greater capacity or power. Since each battery (10) can contain a large number of battery cells (20), the battery cells (20) can be arranged in groups for easier assembly, with each group of battery cells (20) forming a battery module. The number of battery cells (20) in a battery module is unlimited and can be set as needed. A battery can comprise multiple battery modules, which can be connected in series, parallel, or mixed configurations.

[0040] Fig. Figure 3 shows a schematic representation of the structure of a battery cell 20 according to an embodiment of the present application. The battery cell 20 comprises one or more electrode assemblies 22, a housing body 211, and a cover plate 212. The housing body 211 and the cover plate 212 form a housing or battery box 21. The walls of the housing body 211 and the cover plate 212 are referred to as the walls of the battery cell 20. In the case of a cuboid battery cell 20, the walls of the housing body 211 comprise a bottom wall and four side walls. The housing body 211 is shaped according to the form of one or more combined electrode assemblies 22. For example, the housing body 211 can be a hollow cuboid, a cube, or a cylinder, with one side of the housing body 211 having an opening to accommodate one or more electrode assemblies 22 within the housing body 211.If the housing body 211 is, for example, a hollow cuboid or cube, one of its faces is an open surface, i.e., this face has no wall, so the interior and exterior of the housing body 211 are in contact. If the housing body 211 is a hollow cylinder, the end face of the housing body 211 is an open surface, i.e., this end face has no wall, so the interior and exterior of the housing body 211 are in contact. The cover plate 212 covers the opening and is connected to the housing body 211 to form a closed cavity for receiving the electrode assembly 22. The housing body 211 is filled with an electrolyte, for example, an electrolyte solution.

[0041] The battery cell 20 can also include two electrode terminals 214, which can be arranged on the cover plate 212. The cover plate 212 is typically flat. The two electrode terminals 214 are attached to a flat surface of the cover plate 212, with the two electrode terminals 214 being a positive electrode terminal 214a and a negative electrode terminal 214b, respectively. Each electrode terminal 214 is associated with a connecting element 23 or a current collector element 23, which is arranged between the cover plate 212 and the electrode arrangement 22 and serves to electrically connect the electrode arrangement 22 and the electrode terminal 214.

[0042] As in Fig. As shown in Figure 3, each electrode assembly 22 has a first electrode tab 221a and a second electrode tab 222a. The polarity of the first electrode tab 221a is opposite to the polarity of the second electrode tab 222a. For example, if the first electrode tab 221a is a positive electrode tab, the second electrode tab 222a is a negative electrode tab. The first electrode tab 221a of one or more electrode assemblies 22 is connected to an electrode terminal via a connecting element 23, while the second electrode tab 222a of one or more electrode assemblies 22 is connected to another electrode terminal via another connecting element 23. For example, the positive electrode terminal 214a is connected to the positive electrode tab by a connecting element 23, and the negative electrode terminal 214b is connected to the negative electrode tab by another connecting element 23.

[0043] Depending on the actual requirements, this battery cell 20 can be provided with a single or a plurality of electrode arrangements 22. As in Fig. As shown in Figure 3, four separate electrode arrangements 22 are arranged in the battery cell 20.

[0044] A pressure relief mechanism 213 can also be arranged on the battery cell 20. The pressure relief mechanism 213 serves to be actuated when a threshold value for internal pressure or internal temperature of the battery cell 20 is reached, in order to dissipate the internal pressure or internal temperature.

[0045] The pressure relief mechanism 213 can have various possible pressure relief structures, and the embodiments described in the present application are not limited to these. For example, the pressure relief mechanism 213 can be a temperature-sensitive pressure relief mechanism configured to melt when the internal temperature of the battery cell 20 equipped with the pressure relief mechanism 213 reaches a threshold; and / or the pressure relief mechanism 213 can be a pressure-sensitive pressure relief mechanism configured to break when the internal gas pressure of the battery cell 20 equipped with the pressure relief mechanism 213 reaches a threshold.

[0046] Fig. Figure 4 is a schematic representation of the structure of a battery according to an embodiment of the present application. As in Fig. As shown in Figure 4, the battery 10 comprises several battery cells 20 arranged along a first direction, and a thermal management component 101. The thermal management component 101 extends along the first direction and is connected to a first wall 20a of each battery cell 20 of the several battery cells 20, wherein the first wall 20a is the wall with the largest surface area in the battery cell 20 and the thermal management component 101 serves to control the temperature of the battery cells 20; wherein in a second direction a dimension H1 of the thermal management component 101 and a dimension H2 of the first wall 20a satisfy the following condition: 0.1 ≤ H1 / H2 ≤ 2, wherein the second direction is perpendicular to the first direction and parallel to the first wall 20a.

[0047] The thermal management component 101 and the multiple battery cells 20 extend along the first direction, for example along the x-direction, and the thermal management component 101 is connected to the first wall 20a of each battery cell 20 in a series of battery cells 20. The second direction is perpendicular to the first direction and parallel to the first wall 20a, and the second direction can be the z-direction.

[0048] In the second direction, the dimension H1 of the thermal management component 101 can be the height of the thermal management component 101, and the dimension H2 of the first wall 20a can be the height of the first wall 20a. The relationship between H1 and H2 satisfies the following condition: 0.1 ≤ H1 / H2 ≤ 2.

[0049] If H1 / H2 < 0.1, the heat exchange surface between the battery cell 20 and the thermal management component 101 is too small to cool or heat the battery cell 20 in a timely manner, making it difficult to meet the thermal management requirements of the battery.

[0050] If H1 / H2 > 2, the requirements for the thermal management of the battery can be met, but the thermal management component 101 takes up a lot of space, which worsens the space utilization in the second direction and makes it difficult to guarantee the battery's energy density requirements.

[0051] Optionally, the thermal management component 101 can be a water cooling plate, which serves to cool the battery cell 20 during the fast charging process or to heat the battery cell 20 if the temperature is too low.

[0052] Optionally, the thermal management component 101 can be made of a material with good thermal conductivity, for example, metallic materials such as aluminium.

[0053] In the embodiments of the present application, a thermal management component 101 is provided in the battery 10. This component is connected to a first wall 20a with the largest surface area in each of the multiple battery cells 20 arranged in a row along a first direction. In a second direction, a dimension H1 of the thermal management component 101 and a dimension H2 of the first wall 20a satisfy the following condition: 0.1 ≤ H1 / H2 ≤ 2, with the second direction being perpendicular to the first direction and parallel to the first wall 20a. This eliminates the need for a structure such as beams in the central part of the battery 10's body, thereby maximizing the space utilization inside the battery 10 and increasing its energy density. Simultaneously, the temperature of the battery cell 20 can also be controlled by the aforementioned thermal management component 101.Therefore, the technical solutions of the embodiments of the present application enable the requirements for thermal management in the battery 10 to be met while simultaneously increasing the energy density of the battery 10 and thus improving the performance of the battery 10.

[0054] 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 the following condition: 0.3 ≤ H1 / H2 ≤ 1.3. In this way, it can be ensured that the temperature of the battery cell 20 does not exceed 55 °C during the fast charging process.

[0055] Optionally, in an embodiment of the present application, a heat exchange surface S is provided between the first wall 20a and the thermal management component 101, wherein the relationship between a capacity Q of the battery cell 20 and the heat exchange surface S satisfies the following condition: 0.03 Ah / cm² 2 ≤ Q / S ≤ 6.66 Ah / cm 2 .

[0056] The heat exchange surface S can be the contact surface between the first wall 20a and the thermal management component 101. The heat exchange surface S satisfies the following condition: S = H1 × W, where W is the dimension of each battery cell 20 along the first direction.

[0057] If Q / S < 0.03 Ah / cm 2The heat exchange surface S is sufficiently large to meet the requirements for the thermal management of the battery, however, the thermal management component 101 takes up too much space in this case, making it difficult to meet the energy density requirements of the battery 10.

[0058] If Q / S > 6.66 Ah / cm 2 The heat exchange surface S is small, so the heat from battery cell 20 cannot be dissipated in time via the thermal management component 101, and battery cell 20 cannot be cooled quickly and in a timely manner, making it difficult to meet the thermal management requirements.

[0059] By adjusting the relationship between the heat exchange surface S and the capacity Q of battery cell 20, the temperature of battery cell 20 can be maintained within a suitable range during the battery charging process, especially during fast charging. Furthermore, for a given battery cell capacity Q, the thermal management requirements of the battery can be flexibly met by adjusting the heat exchange surface S.

[0060] In one possible implementation, the dimension H1 of the thermal management component ranges from 1.5 cm to 30 cm. This ensures that the temperature of the battery cell does not exceed 55 °C during the battery's fast charging process.

[0061] Fig. Figure 5 is a schematic representation of the connection between a battery cell and a thermal management component according to an embodiment of the present application; Fig. Figure 6 is a cross-sectional view along the AA direction in Fig. 5; Fig. Figure 7 is an enlarged schematic representation of area B in Fig. 6. Optionally, the thermal management component 101 in an embodiment of the present application comprises, with reference to Fig. 5, Fig. 6 to Fig. 7, a first heat-conducting plate 1011 and a second heat-conducting plate 1012, which are arranged opposite each other in a third direction; wherein a flow channel 104 is arranged between the first heat-conducting plate 1011 and the second heat-conducting plate 1012, wherein the flow channel 104 serves to receive a fluid for temperature control of the battery cells 20, wherein the third direction is perpendicular to the first direction and to the second direction.

[0062] The first heat-conducting plate 1011 and the second heat-conducting plate 1012 are arranged opposite each other along the third direction and form the flow channel 104, and the third direction can be the y-direction. The first heat-conducting plate 1011 and the second heat-conducting plate 1012 can be made of a material with good thermal conductivity, for example, metallic materials such as aluminum.

[0063] In the third direction, a series of battery cells 20 arranged along the first direction can be connected to the thermal management component 101 on only one side or on both sides, the embodiments of the present application being not limited in this respect.

[0064] Optionally, the length of the thermal management component 101 along the first direction corresponds to the sum of the lengths of all battery cells 20 in the same row, so that the battery cells 20 can be adequately cooled while simultaneously reducing the space occupied by the thermal management component 101. In other embodiments, the length of the thermal management component 101 can be less than or equal to the sum of the lengths of all battery cells 20 and can be adapted according to the actual requirements, the embodiments of the present application being no longer limited in this respect.

[0065] Optionally, in an embodiment of the present application, the thermal management component 101 also includes a stiffening rib 1013, wherein the stiffening rib 1013 is arranged between the first heat-conducting plate 1011 and the second heat-conducting plate 1012, the stiffening rib 1013, the first heat-conducting plate 1011 and the second heat-conducting plate 1012 forming the flow channel 104. In this way, the structural strength of the thermal management component 101 can be increased.

[0066] Optionally, a single stiffening rib 1013 is provided, forming one or two flow channels 104 between the first heat-conducting plate 1011 and the second heat-conducting plate 1012. If the stiffening rib 1013 is connected only to the first heat-conducting plate 1011 or the second heat-conducting plate 1012, the stiffening rib 1013 forms a cantilever connected at one end to the heat-conducting plate along the third direction, in which case only one flow channel 104 is formed; if the stiffening rib 1013 is connected to both the first heat-conducting plate 1011 and the second heat-conducting plate 1012, two flow channels 104 are formed. The number of stiffening ribs 1013 can be specifically determined according to requirements, and the embodiments of the present application are not limited in this respect.

[0067] Optionally, if several flow channels 104 are present, the different flow channels 104 can be independent of each other or connected to each other via a connection adapter.

[0068] Optionally, the stiffening rib 1013 extends along the first direction, that is, an angle between the stiffening rib and the first heat-conducting plate 1011 or the second heat-conducting plate 1012 is a right angle.

[0069] Optionally, in one embodiment of the present application, the angle between the stiffening rib 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 to the battery cell 20.

[0070] Optionally, in an embodiment of the present application, the battery cell 20 comprises two first walls 20a arranged opposite each other in the second direction and two second walls 20b arranged opposite each other in the first direction, wherein the second walls 20b of two adjacent battery cells 20 are arranged opposite each other in the first direction. For example, the battery cell 20 comprises a first wall 20a, a second wall 20b, and a third wall, wherein the first wall 20a, the second wall 20b, and the third wall are adjacent to each other, and 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 arranged as the top surface of the battery cell facing away from the bottom of the box body, and the other as the base surface of the battery cell is arranged facing the bottom of the box body.

[0071] Fig. Figure 8 is a schematic representation of the structure of a battery according to an embodiment of the present application. Optionally, the battery comprises 10, as shown in Fig. Figure 8 shows an embodiment of the present application in which several rows of multiple battery cells 20 and multiple thermal management components 101 are arranged along the first direction. The multiple rows of battery cells 20 and the multiple thermal management components 101 are arranged alternately in the third direction, and the third direction is perpendicular to the first and second directions. In this way, multiple rows of battery cells 20 and multiple thermal management components 101 are interconnected and form a unit that is enclosed in the box body. This enables effective thermal management for each row of battery cells 20 and simultaneously ensures the overall structural strength of the battery, thereby improving the battery's performance.

[0072] The battery 10 comprises a box body 11, several rows of battery cells 20, several thermal management components 101, piping 103 and fluid collectors 102. The fluid collectors 102 and the piping 103 are arranged at both ends of the thermal management component 101 along the first direction, with the fluid being transported via the piping 103 to the fluid collectors 102 and then collected by the fluid collectors 102 and transported to the thermal management component 101 to cool or heat the battery cells 20.

[0073] Several rows of battery cells 20 and several thermal management components 101 are arranged alternately in the second direction, and can be arranged along the second direction in the following sequence: battery cell - thermal management component - battery cell or thermal management component - battery cell - thermal management component. In the first arrangement, the number of rows of battery cells 20 is N and the number of thermal management components 101 is N-1. The energy density of the battery 10 is higher in this arrangement. In the latter arrangement, the number of rows of battery cells 20 is N and the number of thermal management components 101 is N+1. In this arrangement, the thermal management performance of the battery 10 is better and the cooling rate of the battery cells 20 is higher.The two arrangements mentioned above can cool the battery cell 20 in a timely manner while ensuring the energy density of the battery 10, thus effectively preventing the temperature of the battery cell 20 from becoming too high and causing thermal runaway.

[0074] Optionally, they can be arranged in the battery 10 in the sequence thermal management component - battery cell - battery cell - thermal management component, provided that the cooling or heating of the first wall 20a of the battery cell 20 can be achieved, the embodiments of the present application being not limited to this.

[0075] Optionally, in one embodiment of the present application, the thermal management component 101 is bonded to the first wall 20a. This increases the bond strength between the thermal management component 101 and the first wall 20a.

[0076] Optionally, the thermal management component 101 can also be clamped by attaching it to the first wall 20a between the battery cells 20 of adjacent rows or between a side wall of the box body 11 and the battery cell 20.

[0077] It should be understood that the relevant parts in the embodiments of the present application may refer to each other and are not repeated for the sake of brevity.

[0078] According to one embodiment of the present application, a power-consuming device is provided, comprising a battery 10 according to one of the above embodiments. Optionally, the power-consuming device may be a vehicle 1, a ship, a spacecraft, or the like, but the embodiments of the present application are not limited to such.

[0079] Previously, battery 10 and the power-consuming device were described according to the embodiments of the present application. The method and apparatus for manufacturing a battery according to the embodiments of the present application are described below, whereby reference may be made to the preceding embodiments for parts not described in detail.

[0080] Fig. Figure 9 shows a schematic flowchart of a process 300 for manufacturing a battery according to an embodiment of the present application. As in Fig. As shown in section 9, the procedure can comprise the following steps: 310 Providing multiple battery cells 20 arranged along a first direction; 320 Providing a thermal management component 101, wherein the thermal management component 101 extends along the first direction and is connected to a first wall 20a of each battery cell 20 of the multiple battery cells 20, wherein the first wall 20a is the wall with the largest surface area in the battery cell 20 and the thermal management component 101 serves to control the temperature of the battery cells 20; wherein in a second direction a dimension H1 of the thermal management component 101 and a dimension H2 of the first wall 20a satisfy the following condition: 0.1 ≤ H1 / H2 ≤ 2, wherein the second direction is perpendicular to the first direction and parallel to the first wall 20a.

[0081] Fig. Figure 10 shows a schematic block diagram of a device 400 for manufacturing a battery according to an embodiment of the present application. As in Fig. As shown in Figure 10, the device 400 for manufacturing a battery can comprise the following: a first provisioning module 410 and a second provisioning module 420.

[0082] The first provisioning module 410 is set up to provide several battery cells 20 arranged along a first direction.

[0083] The second provisioning module 420 is configured to provide a thermal management component 101, wherein the thermal management component 101 extends along the first direction and is connected to a first wall 20a of each battery cell 20 of the multiple battery cells 20, wherein the first wall 20a is the wall with the largest surface area in the battery cell 20 and the thermal management component 101 serves to control the temperature of the battery cells 20; wherein in a second direction a dimension H1 of the thermal management component 101 and a dimension H2 of the first wall 20a satisfy the following condition: 0.1 ≤ H1 / H2 ≤ 2, wherein the second direction is perpendicular to the first direction and parallel to the first wall 20a.

[0084] The following are examples of embodiments of the present application. These embodiments are examples and serve only to illustrate the present application; they should not be construed as limiting the present application. If no specific techniques or conditions are indicated in the embodiments, the techniques or conditions described in the technical literature or product instructions must be followed.

[0085] A charging test was performed on the battery; the test results are shown in Table 1. Table 1: Temperature tests during the charging process of battery cells and thermal management components of different specifications Q (Ah) D (mm) W (cm) H2 (cm) H1 (cm) H1 / H2 Q / (H1 × W)(Ah / cm 2 ) LadevorgangHöchsttemperatur T 240 71,25 17,4 20 26 1,3 0,5305 T ≤ 50 °C 280 88 20,3 11,2 20 1,7857 0,6897 T ≤ 50 °C 280 88 20,3 11,2 10,2 0,9107 1,3523 T ≤ 50 °C 280 88 20,3 11,2 5 0,4464 2,7586 50 °C < T≤ 55 °C 280 88 20,3 11,2 1,0 0,0893 13,7931 T > 55 °C 203 85,8 14,8 10,3 20 1,9417 0,6858 T ≤ 50 °C 203 85,8 14,8 10,3 10,2 0,9903 1,3447 T ≤ 50 °C 203 85,8 14,8 10,3 7 0,6796 1,9595 T ≤ 50 °C 203 85,8 14,8 10,3 2,2 0,1942 6,2346 50 °C < T≤ 55 °C 156 44,3 22 10,2 15 1,4706 0,4727 T ≤ 50 °C 156 44,3 22 10,2 10,2 1,0000 0,6952 T ≤ 50 °C 156 44,3 22 10,2 5 0,4902 1,4182 T ≤ 50 °C 102 52 14,8 9,5 20 0,2105 0,0345 T ≤ 50 °C 102 52 14,8 9,5 10,2 0,1074 0,0676 T ≤ 50 °C 5 12,5 12 6,5 12 1,8462 0,0347 T ≤ 50 °C 5 12,5 12 6,5 5 0,7692 0,0833 T ≤ 50 °C

[0086] Although the present application is described with reference to preferred embodiments, various modifications can be made and equivalents used without altering the scope of the present application. In particular, the technical features mentioned in the various embodiments can be combined in any way, provided there are no structural conflicts. The present application is not limited to the specific embodiments disclosed in the text, but encompasses all technical solutions that fall within the scope of the claims.

Claims

Battery (10), characterized in that it comprises: several battery cells (20) arranged along a first direction; a thermal management component (101), wherein the thermal management component (101) extends along the first direction and is connected to a first wall (20a) of each battery cell (20) of the several battery cells (20), wherein the first wall (20a) is the wall with the largest surface area in the battery cell (20) and the thermal management component (101) serves to control the temperature of the battery cells (20); wherein in a second direction a dimension H1 of the thermal management component (101) and a dimension H2 of the first wall (20a) satisfy the following condition: 0.1 ≤ H1 / H2 ≤ 2, and the second direction is perpendicular to the first direction and parallel to the first wall (20a). Battery (10) according to claim 1, characterized in that the dimension H1 of the thermal management component (101) and the dimension H2 of the first wall (20a) further satisfy the following condition: 0.3 ≤ H1 / H2 ≤ 1.

3. Battery (10) according to claim 1 or 2, characterized in that a heat exchange surface S is provided between the first wall (20a) and the thermal management component (101), wherein the relationship between a capacity Q of the battery cell (20) and the heat exchange surface S satisfies the following condition: 0.03 Ah / cm2≤ Q / S ≤ 6.66 Ah / cm2. Battery (10) according to one of claims 1 to 3, characterized in that the dimension H1 of the thermal management component (101) is 1.5 cm to 30 cm. Battery (10) according to one of claims 1 to 4, characterized in that the thermal management component (101) comprises a first thermal interface plate (1011) and a second thermal interface plate (1012) which are arranged opposite each other in a third direction; wherein a flow channel (104) is arranged between the first thermal interface plate (1011) and the second thermal interface plate (1012), wherein the flow channel (104) serves to receive a fluid for temperature control of the battery cells (20), wherein the third direction is perpendicular to the first direction and to the second direction. Battery (10) according to claim 5, characterized in that the thermal management component (101) also comprises a stiffening rib (1013), wherein the stiffening rib (1013) is arranged between the first heat-conducting plate (1011) and the second heat-conducting plate (1012), wherein the stiffening rib (1013), the first heat-conducting plate (1011) and the second heat-conducting plate (1012) form the flow channel (104). Battery (10) according to claim 6, characterized in that an angle between the stiffening rib (1013) and the first heat-conducting plate (1011) or the second heat-conducting plate (1012) is an acute angle. Battery (10) according to one of claims 1 to 7, characterized in that the battery cell (20) comprises two first walls (20a) arranged opposite each other in the third direction and two second walls (20b) arranged opposite each other in the first direction, wherein in the first direction the second walls (20b) of two adjacent battery cells (20) are arranged opposite each other, and the third direction is perpendicular to the first direction and to the second direction. Battery (10) according to one of claims 1 to 8, characterized in that the battery (10) comprises several rows of multiple battery cells (20) arranged along the first direction and multiple thermal management components (101), wherein the multiple rows of battery cells (20) and the multiple thermal management components (101) are arranged alternately in the third direction, and the third direction is perpendicular to the first direction and to the second direction. Battery (10) according to one of claims 1 to 9, characterized in that the thermal management component (101) is bonded to the first wall (20a). Power-consuming device, characterized in that it comprises a battery (10) according to one of claims 1 to 10, wherein the battery (10) serves to provide power. Device (400) for manufacturing a battery, characterized in that it comprises: a first provisioning module (410) configured to provide several battery cells (20) arranged along a first direction; a second provisioning module (420) configured to provide a thermal management component (101), wherein the thermal management component (101) extends along the first direction and is connected to a first wall (20a) of each battery cell (20) of the several battery cells (20), wherein the first wall (20a) is the wall with the largest surface area in the battery cell (20) and the thermal management component (101) serves to control the temperature of the battery cells (20);wherein in a second direction a dimension H1 of the thermal management component (101) and a dimension H2 of the first wall (20a) satisfy the following condition: 0.1 ≤ H1 / H2 ≤ 2, and the second direction is perpendicular to the first direction and parallel to the first wall (20a).

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