Battery pack preparation method, device and equipment and storage medium
By using adhesive to firmly secure the heating film, battery, and battery pack housing together, the failure and dry-burning problems caused by the heating film arrangement were solved, and the stable heating function of the battery pack was achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- DONGFENG MOTOR CO LTD DONGFENG NISSAN PASSENGER VEHICLE CO
- Filing Date
- 2026-01-21
- Publication Date
- 2026-04-28
Smart Images
Figure CN121939073A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of battery manufacturing technology, and in particular to battery pack manufacturing methods, apparatus, equipment and storage media. Background Technology
[0002] New energy vehicles have developed rapidly in recent years, and power batteries have been widely used. The charging and discharging performance of power batteries will be greatly reduced at low temperatures, which greatly affects the driving experience in winter. Therefore, heating is usually used to improve battery performance in low-temperature environments.
[0003] Heating with a heating film is one of the methods for heating power batteries. This method has advantages such as low cost and small installation space. Usually, the heating film is placed on both sides of the battery. This arrangement can easily cause the heating film to fall off, resulting in battery heating failure and dry burning problems. Summary of the Invention
[0004] The main objective of this application is to provide a battery pack preparation method, apparatus, equipment, and storage medium, aiming to solve the technical problem that the arrangement of the heating film in the battery compartment in related technologies easily leads to the failure of the battery heating function and dry burning.
[0005] To achieve the above objectives, this application proposes a battery pack manufacturing method. The battery pack manufacturing method is applied to a battery pack, wherein a heating film is disposed at the bottom of the battery in the battery pack, and the heating film, the battery, and the casing of the battery pack are bonded together by a selected adhesive. The battery pack preparation method includes: Select the adhesive to be tested from the available adhesives; The first area ratio range is determined based on the bottom area of the battery and the bonding parameters of the adhesive to be verified. The second area ratio range is determined based on the bottom area of the battery, the thermal conductivity of the adhesive to be verified, and the thermal conductivity of the heating film. The third area ratio range is determined based on the power density and heating efficiency of the heating film. The area ratio range is the range of the proportion of the heating film to the bottom area of the battery in the battery pack. If the first area ratio interval, the second area ratio interval, and the third area ratio interval intersect, then the adhesive to be verified is selected as the target adhesive, and a battery pack is prepared based on the target adhesive.
[0006] Optionally, determining the first area ratio range based on the bottom area of the battery and the bonding parameters of the adhesive to be verified includes: The bonding strength requirement is determined based on the battery pack design parameters. The bonding strength requirement is the bonding strength requirement between the bottom of the battery and the battery pack housing. The first adhesive strength and the second adhesive strength are determined based on the adhesive parameters of the adhesive to be verified. The first adhesive strength is the structural strength of bonding the battery and the battery pack housing through the adhesive to be verified. The second adhesive strength is the minimum value between the third adhesive strength and the fourth adhesive strength. The third adhesive strength is the adhesive strength of bonding the battery and the heating film through the adhesive to be verified. The fourth adhesive strength is the adhesive strength of bonding the heating film and the battery pack housing through the adhesive to be verified. The first area ratio range is determined based on the bottom area of the battery, the required bonding strength, the first bonding strength, and the second bonding strength.
[0007] Optionally, determining the second area ratio range based on the bottom area of the battery, the thermal conductivity of the adhesive to be verified, and the thermal conductivity of the heating film includes: The thermal conductivity design parameters are determined based on the battery pack design parameters. The thermal conductivity design parameters include the thickness of the first adhesive, the thickness of the second adhesive, the thickness of the heating film, and the target value of the thermal conductivity. The first adhesive thickness is the thickness of the adhesive between the bottom of the battery and the battery pack housing. The second adhesive thickness is the thickness of the adhesive between the bottom of the battery and the heating film. The target value of the thermal conductivity is the minimum target value of the thermal conductivity between a single battery in the battery pack and the battery pack housing. The second area ratio range is determined based on the thermal conductivity design parameters, the bottom area of the battery, the thermal conductivity of the adhesive to be verified, and the thermal conductivity of the heating film.
[0008] Optionally, determining the third area ratio range based on the heating film power density and heating film heating efficiency includes: The target battery heating rate is determined based on the battery pack design parameters, and the battery specification parameters are obtained, including battery mass and battery specific heat capacity. The third area ratio range is determined based on the heating film power density, heating film heating efficiency, battery specifications, and battery heating speed target.
[0009] Optionally, after determining the third area ratio range based on the heating film power density and heating film heating efficiency, the method further includes: If the first area ratio interval, the second area ratio interval, and the third area ratio interval do not intersect, then it is detected whether the power density of the heating film is less than the maximum power density. If it is less than the maximum power density, then increase the power density of the heating film and return to the step of determining the third area ratio range based on the power density and heating efficiency of the heating film.
[0010] Optionally, after detecting whether the power density of the heating film is less than the maximum power density if the first area proportion interval, the second area proportion interval, and the third area proportion interval do not intersect, the method further includes: If it is not less than the maximum power density, then return to the step of selecting the adhesive to be verified from the available adhesives.
[0011] Optionally, if the first area proportion interval, the second area proportion interval, and the third area proportion interval intersect, then the adhesive to be verified is selected as the target adhesive, including: If the first area ratio interval, the second area ratio interval, and the third area ratio interval intersect, then the heating film area ratio interval corresponding to the adhesive to be verified is determined according to the intersection, and the step of selecting the adhesive to be verified from the available adhesives is returned until the heating film area ratio interval of each available adhesive is obtained. Extract the minimum value in the range of heating film area ratios to generate the minimum heating film area ratio corresponding to each available adhesive. Based on the corresponding minimum heating film area ratio, the available adhesives are sorted from smallest to largest to generate the adhesive sorting results; The adhesive ranked first in the adhesive sorting results is selected as the target adhesive, and the battery pack is prepared based on the target adhesive.
[0012] In addition, to achieve the above objectives, this application also provides a battery pack manufacturing apparatus, which is applied to a battery pack, wherein a heating film is provided at the bottom of the battery in the battery pack, and the heating film, the battery, and the housing of the battery pack are bonded together by a selected adhesive. The battery pack manufacturing apparatus includes: An optional traversal module is available to select adhesives to be verified from the available adhesives; The first determining module is used to determine the first area ratio range based on the bottom area of the battery and the bonding parameters of the adhesive to be verified. The second determining module is used to determine the second area ratio range based on the bottom area of the battery, the thermal conductivity of the adhesive to be verified, and the thermal conductivity of the heating film. The third determining module is used to determine the third area ratio range based on the power density and heating efficiency of the heating film. The area ratio range is the ratio range of the heating film to the bottom area of the battery in the battery pack. The target selection module is used to select the adhesive to be verified as the target adhesive if there is an intersection between the first area ratio interval, the second area ratio interval and the third area ratio interval, and then prepare the battery pack based on the target adhesive.
[0013] In addition, to achieve the above objectives, this application also provides a battery pack manufacturing apparatus, the apparatus comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, the computer program being configured to implement the steps of the battery pack manufacturing method as described above.
[0014] In addition, to achieve the above objectives, this application also provides a storage medium, which is a computer-readable storage medium, and stores a computer program thereon. When the computer program is executed by a processor, it implements the steps of the battery pack preparation method as described above.
[0015] In addition, to achieve the above objectives, this application also provides a computer program product, which includes a computer program that, when executed by a processor, implements the steps of the battery pack preparation method described above.
[0016] In addition, to achieve the above objectives, this application also provides a battery pack, wherein a heating film is provided at the bottom of the battery in the battery pack, and the heating film, the battery and the housing of the battery pack are bonded together by a selected adhesive. The proportion of the heating film to the bottom area of the battery in the battery pack is within the intersection range, which is the intersection of the first area proportion range, the second area proportion range and the third area proportion range corresponding to the selected adhesive.
[0017] One or more technical solutions proposed in this application have at least the following technical effects: This application enables the preparation of a battery pack with a heating film at the bottom. The battery pack housing, heating film, and battery are firmly fixed together by adhesive, effectively avoiding the problems of heating film detachment and dry burning. Attached Figure Description
[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.
[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0020] Figure 1 This is a schematic flowchart of the battery pack manufacturing method of this application, provided in Example 1. Figure 2 This is a schematic flowchart of the battery pack manufacturing method in Example 2 of this application; Figure 3This is a schematic diagram of a battery pack structure according to an embodiment of this application; Figure 4 This is a schematic diagram of the adhesive thickness according to an embodiment of this application; Figure 5 This is a schematic diagram of the module structure of the battery pack manufacturing apparatus according to an embodiment of this application; Figure 6 This is a schematic diagram of the equipment structure of the hardware operating environment involved in the battery pack manufacturing method in this application embodiment.
[0021] The purpose, features, and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0022] It should be understood that the specific embodiments described herein are merely illustrative of the technical solutions of this application and are not intended to limit this application.
[0023] To better understand the technical solution of this application, a detailed description will be provided below in conjunction with the accompanying drawings and specific implementation methods.
[0024] Based on this, the present application provides a method for preparing a battery pack, referring to... Figure 1 , Figure 1 This is a schematic flowchart of the first embodiment of the battery pack manufacturing method of this application.
[0025] In this embodiment, the battery pack preparation method is applied to a battery pack, that is, this type of battery pack can be prepared by the battery pack preparation method of this embodiment. A heating film is provided at the bottom of the battery in the battery pack, and the heating film, the battery and the battery pack housing are bonded together by a selected adhesive.
[0026] Understandably, the heating film is placed at the bottom of the battery and adhered to the battery housing. The gap between the battery and the housing is filled with thermally conductive adhesive. The adhesive can firmly secure the battery housing, heating film, and battery together, which can effectively prevent the heating film from falling off and dry burning, thereby increasing the power density per unit area of the heating film.
[0027] The battery pack preparation method includes steps S10~S50: Step S10: Select the adhesive to be tested from the available adhesives.
[0028] It should be noted that the execution subject of this embodiment can be the battery pack manufacturing equipment, which can be a personal computer, server or other electronic device, or other devices that can achieve the same or similar functions. This embodiment does not limit this. In this embodiment and the following embodiments, the battery pack manufacturing equipment is used as an example to illustrate the battery pack manufacturing method of this application.
[0029] It should be noted that the available adhesive can be determined by the battery pack manufacturing equipment based on actual needs and can be used in actual battery manufacturing.
[0030] Optionally, to ensure thermal conductivity and adhesive strength, the adhesive can be a structural adhesive with thermal conductivity. Of course, other adhesives with similar properties can also be used depending on actual needs, and this embodiment does not limit this.
[0031] In practical use, the available adhesives can be sorted according to preset rules, and then the adhesive to be verified can be selected from the available adhesives according to the sorting results.
[0032] When sorting the available adhesives, the sorting rules can be constructed based on at least one of the sorting factors such as price, thermal conductivity, weight, and historical usage evaluation. This embodiment does not limit this.
[0033] Step S20: Determine the first area ratio range based on the bottom area of the battery and the bonding parameters of the adhesive to be verified.
[0034] It should be noted that the bottom area of the battery can be the bottom area of the individual battery cells used in the battery pack. The bonding parameters of the adhesive to be verified can be characterized by a list, which includes the bonding strength between different materials. For example, the list includes the bonding strength per unit area between metal and plastic as A, and the bonding strength per unit area between metals as B.
[0035] The first area ratio range can be the ratio range of the heating film to the bottom area of the battery in the battery pack. The second and third area ratio ranges below have the same meaning as the first area ratio range, but the calculation methods and calculation basis are different, which will not be elaborated on later.
[0036] In practical use, the required bonding area can be determined based on the bottom area of the battery and the bonding parameters of the adhesive to be verified, while ensuring the stability of the bond. This allows for the calculation of the proportion of the heating film to the bottom area of the battery, thus obtaining the first area proportion range.
[0037] In a specific implementation, in order to reasonably calculate the first area proportion interval, step S20 of this embodiment may include: The bonding strength requirement is determined based on the battery pack design parameters. The bonding strength requirement is the bonding strength requirement between the bottom of the battery and the battery pack housing. The first bond strength and the second bond strength are determined based on the bonding parameters of the adhesive to be verified; The first area ratio range is determined based on the bottom area of the battery, the required bonding strength, the first bonding strength, and the second bonding strength.
[0038] It should be noted that the battery pack design parameters can be pre-set by the managers of the battery pack manufacturing equipment based on the actual application scenario and to meet the application requirements. The battery pack design parameters can be analyzed to extract the bonding strength requirements, which can be the bonding strength requirements between the bottom of the battery and the battery pack casing.
[0039] In practical applications, the first and second bond strengths can be determined based on the bonding parameters of the adhesive to be tested.
[0040] The first bonding strength is the structural strength of the battery and battery pack housing bonded together by the adhesive to be verified; the second bonding strength is the minimum of the third and fourth bonding strengths; the third bonding strength is the bonding strength of the battery and heating film bonded together by the adhesive to be verified; and the fourth bonding strength is the bonding strength of the heating film and battery pack housing bonded together by the adhesive to be verified.
[0041] Understandably, the first and second bond strengths can be determined by searching the bonding parameters of the adhesive to be verified based on the material of the battery, the material of the battery pack casing, and the material of the heating film.
[0042] In a practical implementation, the following functions can be constructed:
[0043] In the formula, σ0 is the required bonding strength, σ1 is the first bonding strength, σ2 is the second bonding strength, S is the bottom area of the battery, and S1 is the area ratio of the heating film.
[0044] In practical applications, the required bonding strength, the first bonding strength, and the second bonding strength can be substituted into this function for deformation processing to obtain the range of values for S1 that meets the design, thereby obtaining the first area ratio range.
[0045] Step S30: Determine the second area ratio range based on the bottom area of the battery, the thermal conductivity of the adhesive to be verified, and the thermal conductivity of the heating film.
[0046] In practical applications, the thermal conductivity of the adhesive to be verified and the thermal conductivity of the heating film can be used to estimate the required bonding area to meet the thermal conductivity requirements of the battery pack design. Based on this, the proportion of the heating film in the bottom area of the battery pack can be calculated, thus obtaining the second area proportion range.
[0047] In a specific implementation, in order to reasonably calculate the second area ratio range, step S30 in this embodiment may include: Determine the thermal conductivity design parameters based on the battery pack design parameters; The second area ratio range is determined based on the thermal conductivity design parameters, the bottom area of the battery, the thermal conductivity of the adhesive to be verified, and the thermal conductivity of the heating film.
[0048] In practical applications, thermal conductivity design parameters can be extracted from the battery pack design parameters. These parameters may include the thickness of the first adhesive, the thickness of the second adhesive, the thickness of the heating film, and the target value of the thermal conductivity.
[0049] The first adhesive thickness is the adhesive thickness between the bottom of the battery and the battery pack housing, the second adhesive thickness is the adhesive thickness between the bottom of the battery and the heating film, the heating film thickness can be determined according to the physical parameters of the selected heating film, and the target value of thermal conductivity can be the minimum target value of thermal conductivity between a single battery in the battery pack and the battery pack housing.
[0050] In practical applications, when S1 is less than S, the following equation can be constructed:
[0051] When S equals S, the following equation can be constructed:
[0052] In the formula, L is the thickness of the first adhesive, L1 is the thickness of the second adhesive, L2 is the thickness of the heating film, λ1 is the thermal conductivity of the adhesive to be verified, λ2 is the thermal conductivity of the heating film, λ0 is the target value of thermal conductivity, S is the bottom area of the battery, and S1 is the area ratio of the heating film.
[0053] In practical applications, the thermal conductivity design parameters, the bottom area of the battery, the thermal conductivity of the adhesive to be verified, and the thermal conductivity of the heating film are substituted into the above equations for solution. The range of values for S1 that meets the design is obtained, thereby obtaining the second area ratio range.
[0054] Step S40: Determine the third area ratio range based on the power density and heating efficiency of the heating film.
[0055] It should be noted that the power density of the heating film can be the power density parameter per unit area of the current heating film, and the heating efficiency of the heating film can be the efficiency of the heating film per unit area in heating the battery.
[0056] In practical applications, the heating film's power density and heating efficiency can be used to calculate and determine the proportion of the bottom area of the battery that the heating film needs to occupy, provided that the heating performance of the heating film meets the requirements of the battery pack design. This will give us the third area proportion range.
[0057] In a specific implementation, in order to reasonably calculate the third area ratio interval, step S40 in this embodiment may include: Determine the target battery heating rate based on the battery pack design parameters and obtain the battery specification parameters; The third area ratio range is determined based on the heating film power density, heating film heating efficiency, battery specifications, and battery heating speed target.
[0058] It should be noted that the target battery heating rate can be the maximum heating rate required to heat the batteries in the battery pack during actual use. Battery specifications can be the physical parameters of the batteries in the battery pack, including parameters such as battery mass and specific heat capacity.
[0059] In practical use, the following functions can be constructed:
[0060] In the formula, dT0 / dt can be the target heating rate of the battery, Ps is the power density of the heating film, c is the specific heat capacity of the battery, m is the mass of the battery, and η is the heating efficiency of the heating film.
[0061] In practical applications, the heating film power density, heating film heating efficiency, battery specifications, and battery heating speed target can be substituted into the above function to obtain the range of values for S1 that meets the design, thereby obtaining the third area ratio range.
[0062] Step S50: If the first area ratio interval, the second area ratio interval, and the third area ratio interval intersect, then the adhesive to be verified is selected as the target adhesive, and a battery pack is prepared based on the target adhesive.
[0063] In practical use, if the first area ratio interval, the second area ratio interval, and the third area ratio interval intersect, it means that the battery pack actually prepared at this time has met the design requirements in terms of bonding stability, thermal conductivity, and heating speed. Therefore, the adhesive to be verified can be selected as the target adhesive, and the battery pack can be prepared based on the target adhesive.
[0064] In practical applications, when preparing a battery pack based on a target adhesive, an area ratio value can be selected from the intersection as the heating film area ratio. Based on the heating film area ratio, a heating film is arranged for each individual cell in the battery pack, and the target adhesive is applied between the battery pack housing, the individual cell, and the heating film for bonding, thereby preparing the battery pack.
[0065] In the process of manufacturing the battery pack, it can also be manufactured according to the relevant parameters of the battery pack design. These relevant parameters may include the thickness of the adhesive between the bottom of the battery and the battery pack housing, the thickness of the adhesive between the bottom of the battery and the heating film, etc. This embodiment does not impose any restrictions on this.
[0066] In a specific implementation, to determine as much as possible whether the adhesive to be verified is truly usable, step S30 of this embodiment may further include: If the first area ratio interval, the second area ratio interval, and the third area ratio interval do not intersect, then it is detected whether the power density of the heating film is less than the maximum power density. If it is less than the maximum power density, then increase the power density of the heating film and return to the step of determining the third area ratio range based on the power density and heating efficiency of the heating film.
[0067] It should be noted that if the first area ratio interval, the second area ratio interval, and the third area ratio interval do not overlap, it means that at least one of the following—bonding stability, thermal conductivity, and heating speed—is difficult to meet the design requirements. In fact, within the allowable range, increasing the power density of the heating film has little impact on the heating film (such as cost, weight, and thickness). Therefore, it is possible to try adjusting the power density of the heating film and further confirm whether the adjustment can meet the design requirements.
[0068] In practical use, if the first area ratio interval, the second area ratio interval, and the third area ratio interval do not overlap, it is possible to detect whether the power density of the heating film is less than the maximum power density. If the power density of the heating film is less than the maximum power density, it means that the power density of the heating film is still within the allowable range. Therefore, the power density of the heating film can be increased, and the process can return to step S30 to recalculate the third area ratio range based on the adjusted power density of the heating film and re-verify.
[0069] The maximum power density can be the maximum allowable power density, which can be preset by the manager of the battery pack manufacturing equipment according to the actual situation.
[0070] In practical applications, each time the power density of the heating film is increased, a fixed amount can be added. At this time, it can be first detected whether the power density of the heating film is less than the difference between the maximum power density and the fixed value. If it is less, the fixed value is added; if it is greater, the power density of the heating film is increased to the maximum power density.
[0071] For example: Assume the power density of the heating film is Ps, the maximum power density is Ps_max, and the fixed value when it increases is ΔPs; We can first determine whether there exists a Ps ≤ Ps_max - △Ps. If so, we increase Ps to Ps + △Ps. If not, further check if there exists Ps_max - △Ps < Ps < Ps_max. If so, increase Ps to Ps_max.
[0072] Of course, other methods can also be used, such as first increasing the power density of the heating film, and then detecting whether the increased power density of the heating film is greater than or equal to the maximum power density. If so, it is adjusted to the maximum power density. This embodiment does not limit this.
[0073] In a specific implementation, in order to reasonably select the target adhesive, after the step of detecting whether the power density of the heating film is less than the maximum power density if the first area proportion interval, the second area proportion interval, and the third area proportion interval do not overlap, this embodiment may further include: If it is not less than the maximum power density, then return to the step of selecting the adhesive to be verified from the available adhesives.
[0074] It is understandable that if the first area ratio interval, the second area ratio interval, and the third area ratio interval do not intersect, and the power density of the heating film is detected to be not less than the maximum power density, it means that the power density of the heating film has been adjusted before, but the design requirements still cannot be met after adjustment. At this time, it can be determined that the adhesive to be verified is not suitable as the target adhesive. It is possible to try to detect whether other available adhesives meet the design requirements. Therefore, it is possible to return to step S10 and reselect the adhesive to be verified.
[0075] This embodiment provides a battery pack manufacturing method. Through this application, a battery pack with a heating film set at the bottom can be prepared. The battery pack body, heating film and battery are firmly fixed together by adhesive, which effectively avoids the problem of heating film falling off and dry burning.
[0076] Based on the first embodiment of this application, in the second embodiment of this application, the content that is the same as or similar to that in Embodiment 1 above can be referred to the above description, and will not be repeated hereafter. Based on this, please refer to... Figure 2Step S50 includes steps S501 to S504: Step S501: If the first area ratio interval, the second area ratio interval, and the third area ratio interval intersect, then determine the heating film area ratio interval corresponding to the adhesive to be verified based on the intersection, and return to the step of selecting the adhesive to be verified from the available adhesives, until the heating film area ratio interval of each available adhesive is obtained. Step S502: Extract the minimum value in the range of heating film area ratios to generate the minimum heating film area ratio corresponding to each available adhesive; Step S503: Sort the available adhesives from smallest to largest based on the corresponding minimum heating film area ratio, and generate the adhesive sorting result; Step S504: Select the adhesive ranked first in the adhesive sorting results as the target adhesive, and prepare the battery pack based on the target adhesive.
[0077] It should be noted that, in order to select the most suitable adhesive to prepare the battery pack, when it is determined that there is an intersection between the first area ratio interval, the second area ratio interval, and the third area ratio interval, the heating film area ratio interval corresponding to the adhesive to be verified can be calculated based on the intersection. After that, step S10 can be returned to be executed until the corresponding heating film area ratio interval has been calculated for all the optional adhesives.
[0078] Subsequently, the minimum value can be extracted from the heating film area ratio range corresponding to each optional adhesive to generate the minimum heating film area ratio corresponding to each available adhesive. Based on the corresponding minimum heating film area ratio, each available adhesive is sorted from smallest to largest, and the adhesive ranked first in the adhesive sorting result is selected as the target adhesive. Then, the battery pack is prepared based on the target adhesive.
[0079] Understandably, this selection method ensures that when preparing the battery pack based on the selected target adhesive, the area of the heating film required is minimized while meeting design requirements.
[0080] Of course, in actual use, other factors can be selected, and this embodiment does not limit this.
[0081] For example, assuming cost-based selection, the heating film cost and adhesive cost can be calculated based on the heating film area ratio range of each available adhesive, thus obtaining the setup cost range corresponding to each available adhesive. Then, the minimum value is extracted from each setup cost range to generate the minimum setup cost corresponding to each available adhesive. Finally, based on the corresponding minimum setup cost, each available adhesive is sorted from smallest to largest, and the adhesive ranked first in the sort is selected as the target adhesive.
[0082] To facilitate understanding, we will now combine... Figure 3 , Figure 4 , Figure 5 This explanation is provided, but it does not limit the scope of this solution. Figure 3 This is a schematic diagram of the battery pack structure in this embodiment. Figure 4 This is a schematic diagram of the adhesive thickness in this embodiment.
[0083] like Figure 3 As shown, the battery pack proposed in this application includes a battery pack housing, a battery, and a heating film, and the battery pack housing, the battery, and the heating film are all bonded together with adhesive.
[0084] The adhesive setting is as follows: Figure 4 As shown, Figure 4 As shown in the enlarged view corresponding to the dashed box, a heating film is installed at the bottom of the battery. The battery and the heating film are bonded together with adhesive, and the battery is also bonded to the battery pack housing with adhesive. In this process, the thickness of the adhesive between the battery and the battery pack housing is L (i.e., the thickness of the first adhesive mentioned above), the thickness of the adhesive between the battery and the heating film (i.e., the thickness of the second adhesive mentioned above) is L1, and the thickness of the heating film is L2. It should be noted that the above combination Figures 3-4 This is for illustrative purposes only and does not specifically limit the placement of the heating film and adhesive. Depending on actual needs, the placement of the heating film can be adjusted (e.g., instead of placing the heating film on both sides of the bottom of the battery, place it in the center of the bottom). This embodiment does not impose any restrictions on this.
[0085] This embodiment provides a battery pack preparation method. After calculating the heating film area ratio range corresponding to each available adhesive, the target adhesive is selected from the available adhesives according to the heating film area ratio range, so as to ensure that the most suitable adhesive can be selected to prepare the battery pack.
[0086] It should be noted that the above examples are only for understanding this application and do not constitute a limitation on the battery pack preparation method of this application. Any simple modifications based on this technical concept are within the protection scope of this application.
[0087] This application also provides a battery pack, wherein a heating film is provided at the bottom of the battery in the battery pack, and the heating film, the battery and the housing of the battery pack are bonded together by a selected adhesive. The proportion of the heating film to the bottom area of the battery in the battery pack is within the intersection range, which is the intersection of the first area proportion range, the second area proportion range and the third area proportion range corresponding to the selected adhesive.
[0088] This application also provides a battery pack manufacturing apparatus, please refer to... Figure 5The battery pack manufacturing apparatus is applied to a battery pack. A heating film is provided at the bottom of the battery in the battery pack. The heating film, the battery, and the battery pack housing are bonded together by a selected adhesive. The battery pack manufacturing apparatus includes: Optional traversal module 10 is used to select the adhesive to be verified from the available adhesives; The first determining module 20 is used to determine the first area ratio range based on the bottom area of the battery and the bonding parameters of the adhesive to be verified. The second determining module 30 is used to determine the second area ratio range based on the bottom area of the battery, the thermal conductivity of the adhesive to be verified, and the thermal conductivity of the heating film. The third determining module 40 is used to determine the third area ratio range based on the heating film power density and heating film heating efficiency. The area ratio range is the ratio range of the heating film to the bottom area of the battery in the battery pack. The target selection module 50 is used to select the adhesive to be verified as the target adhesive if there is an intersection between the first area ratio interval, the second area ratio interval and the third area ratio interval, and then prepare the battery pack based on the target adhesive.
[0089] The battery pack manufacturing apparatus provided in this application, employing the battery pack manufacturing method described in the above embodiments, can solve the technical problem that the arrangement of the heating film in the battery gauge of related technologies easily leads to battery heating function failure and dry burning. Compared with the prior art, the beneficial effects of the battery pack manufacturing apparatus provided in this application are the same as those of the battery pack manufacturing method provided in the above embodiments, and other technical features in the battery pack manufacturing apparatus are the same as those disclosed in the methods of the above embodiments, and will not be repeated here.
[0090] This application provides a battery pack manufacturing apparatus, which includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the battery pack manufacturing method in Embodiment 1 above.
[0091] The following is for reference. Figure 6The diagram illustrates a structural schematic of a battery pack fabrication apparatus suitable for implementing embodiments of this application. The battery pack fabrication apparatus in these embodiments may include, but is not limited to, mobile terminals such as mobile phones, laptops, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Description), PMPs (Portable Media Players), and in-vehicle terminals (e.g., in-vehicle navigation terminals), as well as fixed terminals such as digital TVs and desktop computers. Figure 6 The battery pack manufacturing equipment shown is merely an example and should not be construed as limiting the functionality and scope of the embodiments of this application.
[0092] like Figure 6 As shown, the battery pack manufacturing equipment may include a processing device 1001 (e.g., a central processing unit, a graphics processing unit, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory 1002 or a program loaded from a storage device 1003 into a random access memory 1004. The random access memory 1004 also stores various programs and data required for the operation of the battery pack manufacturing equipment. The processing device 1001, the read-only memory 1002, and the random access memory 1004 are interconnected via a bus 1005. An input / output interface 1006 is also connected to the bus. Typically, the following systems can be connected to the input / output interface 1006: input devices 1007 including, for example, a touch screen, touchpad, keyboard, mouse, image sensor, microphone, accelerometer, gyroscope, etc.; output devices 1008 including, for example, a liquid crystal display (LCD), speaker, vibrator, etc.; storage devices 1003 including, for example, magnetic tape, hard disk, etc.; and communication devices 1009. The communication device 1009 allows the battery pack manufacturing equipment to communicate wirelessly or wiredly with other devices to exchange data. Although the figures show battery pack manufacturing equipment with various systems, it should be understood that implementing or having all of the systems shown is not required. More or fewer systems may be implemented alternatively.
[0093] Specifically, according to the embodiments disclosed in this application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments disclosed in this application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via a communication device, or installed from storage device 1003, or installed from read-only memory 1002. When the computer program is executed by processing device 1001, it performs the functions defined in the methods of the embodiments disclosed in this application.
[0094] The battery pack manufacturing equipment provided in this application, employing the battery pack manufacturing method described in the above embodiments, can solve the technical problem that the arrangement of the heating film in the battery meter of related technologies easily leads to battery heating function failure and dry burning. Compared with the prior art, the beneficial effects of the battery pack manufacturing equipment provided in this application are the same as those of the battery pack manufacturing method provided in the above embodiments, and other technical features in this battery pack manufacturing equipment are the same as those disclosed in the previous embodiment method, and will not be repeated here.
[0095] It should be understood that the various parts disclosed in this application can be implemented using hardware, software, firmware, or a combination thereof. In the description of the above embodiments, specific features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.
[0096] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.
[0097] This application provides a computer-readable storage medium having computer-readable program instructions (i.e., a computer program) stored thereon, the computer-readable program instructions being used to execute the battery pack preparation method in the above embodiments.
[0098] The computer-readable storage medium provided in this application may be, for example, a USB flash drive, but is not limited to, electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems or devices, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to: electrical connections having one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system or device. The program code contained on the computer-readable storage medium may be transmitted using any suitable medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination thereof.
[0099] The aforementioned computer-readable storage medium may be included in the battery pack manufacturing equipment; or it may exist independently and not assembled into the battery pack manufacturing equipment.
[0100] The aforementioned computer-readable storage medium carries one or more programs. When these programs are executed by the battery pack fabrication equipment, the battery pack fabrication equipment causes the following: it selects an adhesive to be tested from available adhesives; determines a first area proportion range based on the bottom area of the battery and the bonding parameters of the adhesive to be tested; determines a second area proportion range based on the bottom area of the battery, the thermal conductivity of the adhesive to be tested, and the thermal conductivity of the heating film; determines a third area proportion range based on the power density and heating efficiency of the heating film, wherein the area proportion range is the proportion range of the heating film to the bottom area of the battery in the battery pack; and if the first area proportion range, the second area proportion range, and the third area proportion range intersect, then the adhesive to be tested is selected as the target adhesive, and the battery pack is fabricated based on the target adhesive.
[0101] Computer program code for performing the operations of this application can be written in one or more programming languages or a combination thereof. These programming languages include object-oriented programming languages—such as Python, Java, Smalltalk, and C++—and conventional procedural programming languages—such as the "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including a Local Area Network (LAN) or a Wide Area Network (WAN)—or can be connected to an external computer (e.g., via the Internet using an Internet service provider).
[0102] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this application. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.
[0103] The modules described in the embodiments of this application can be implemented in software or hardware. The names of the modules do not necessarily limit the functionality of the unit itself.
[0104] The readable storage medium provided in this application is a computer-readable storage medium that stores computer-readable program instructions (i.e., a computer program) for executing the above-described battery pack preparation method. This solves the technical problem that the arrangement of the heating film in the battery holder in related technologies easily leads to battery heating function failure and dry burning. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided in this application are the same as those of the battery pack preparation method provided in the above embodiments, and will not be repeated here.
[0105] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the steps of the battery pack preparation method described above.
[0106] The computer program product provided in this application can solve the technical problem that the arrangement of the heating film in the battery compartment of related technologies easily leads to battery heating function failure and dry burning. Compared with the prior art, the beneficial effects of the computer program product provided in this application are the same as the beneficial effects of the battery pack preparation method provided in the above embodiments, and will not be repeated here.
[0107] All user-related data involved in this application (such as user privacy data, user behavior data, etc.) were obtained with the user's permission or consent; that is to say, when this application is used in a specific product or technology, user permission is required to obtain and process the relevant data, and the processing of the relevant data must comply with the relevant laws, regulations and regulatory standards of the relevant countries and regions.
[0108] The above description is only a part of the embodiments of this application and does not limit the scope of protection of this application. All equivalent structural transformations made under the technical concept of this application and using the content of this application specification and drawings, or direct / indirect applications in other related technical fields, are included in the scope of protection of this application.
Claims
1. A method for preparing a battery pack, characterized in that, The battery pack manufacturing method is applied to a battery pack, wherein a heating film is provided at the bottom of the battery in the battery pack, and the heating film, the battery, and the battery pack housing are bonded together by a selected adhesive. The battery pack preparation method includes: Select the adhesive to be tested from the available adhesives; The first area ratio range is determined based on the bottom area of the battery and the bonding parameters of the adhesive to be verified. The second area ratio range is determined based on the bottom area of the battery, the thermal conductivity of the adhesive to be verified, and the thermal conductivity of the heating film. The third area ratio range is determined based on the power density and heating efficiency of the heating film. The area ratio range is the range of the proportion of the heating film to the bottom area of the battery in the battery pack. If the first area ratio interval, the second area ratio interval, and the third area ratio interval intersect, the adhesive to be verified is selected as the target adhesive, and a battery pack is prepared based on the target adhesive.
2. The battery pack preparation method according to claim 1, characterized in that, The process of determining the first area ratio range based on the bottom area of the battery and the bonding parameters of the adhesive to be verified includes: The bonding strength requirement is determined based on the battery pack design parameters. The bonding strength requirement is the bonding strength requirement between the bottom of the battery and the battery pack housing. The first adhesive strength and the second adhesive strength are determined based on the adhesive parameters of the adhesive to be verified. The first adhesive strength is the structural strength of bonding the battery and the battery pack housing through the adhesive to be verified. The second adhesive strength is the minimum value between the third adhesive strength and the fourth adhesive strength. The third adhesive strength is the adhesive strength of bonding the battery and the heating film through the adhesive to be verified. The fourth adhesive strength is the adhesive strength of bonding the heating film and the battery pack housing through the adhesive to be verified. The first area ratio range is determined based on the bottom area of the battery, the required bonding strength, the first bonding strength, and the second bonding strength.
3. The battery pack preparation method according to claim 1, characterized in that, The determination of the second area ratio range based on the bottom area of the battery, the thermal conductivity of the adhesive to be verified, and the thermal conductivity of the heating film includes: The thermal conductivity design parameters are determined based on the battery pack design parameters. The thermal conductivity design parameters include the thickness of the first adhesive, the thickness of the second adhesive, the thickness of the heating film, and the target value of the thermal conductivity. The first adhesive thickness is the thickness of the adhesive between the bottom of the battery and the battery pack housing. The second adhesive thickness is the thickness of the adhesive between the bottom of the battery and the heating film. The target value of the thermal conductivity is the minimum target value of the thermal conductivity between a single battery in the battery pack and the battery pack housing. The second area ratio range is determined based on the thermal conductivity design parameters, the bottom area of the battery, the thermal conductivity of the adhesive to be verified, and the thermal conductivity of the heating film.
4. The battery pack preparation method according to claim 1, characterized in that, The determination of the third area ratio range based on the power density and heating efficiency of the heating film includes: The target battery heating rate is determined based on the battery pack design parameters, and the battery specification parameters are obtained, including battery mass and battery specific heat capacity. The third area ratio range is determined based on the heating film power density, heating film heating efficiency, battery specifications, and battery heating speed target.
5. The battery pack preparation method according to claim 1, characterized in that, After determining the third area ratio range based on the heating film power density and heating film heating efficiency, the method further includes: If the first area ratio interval, the second area ratio interval, and the third area ratio interval do not intersect, then it is detected whether the power density of the heating film is less than the maximum power density. If it is less than the maximum power density, then increase the power density of the heating film and return to the step of determining the third area ratio range based on the power density and heating efficiency of the heating film.
6. The battery pack preparation method according to claim 5, characterized in that, If the first area proportion interval, the second area proportion interval, and the third area proportion interval do not overlap, then after detecting whether the power density of the heating film is less than the maximum power density, the method further includes: If it is not less than the maximum power density, then return to the step of selecting the adhesive to be verified from the available adhesives.
7. The battery pack preparation method according to any one of claims 1-6, characterized in that, If the first area percentage interval, the second area percentage interval, and the third area percentage interval intersect, then the adhesive to be verified is selected as the target adhesive, including: If the first area ratio interval, the second area ratio interval, and the third area ratio interval intersect, then the heating film area ratio interval corresponding to the adhesive to be verified is determined according to the intersection, and the step of selecting the adhesive to be verified from the available adhesives is returned until the heating film area ratio interval of each available adhesive is obtained. Extract the minimum value in the range of heating film area ratios to generate the minimum heating film area ratio corresponding to each available adhesive. Based on the corresponding minimum heating film area ratio, the available adhesives are sorted from smallest to largest to generate the adhesive sorting results; The adhesive ranked first in the adhesive sorting results is selected as the target adhesive, and the battery pack is prepared based on the target adhesive.
8. A battery pack manufacturing apparatus, characterized in that, The battery pack manufacturing apparatus is applied to a battery pack, wherein a heating film is provided at the bottom of the battery in the battery pack, and the heating film, the battery, and the battery pack housing are bonded together by a selected adhesive. The battery pack manufacturing apparatus includes: An optional traversal module is available to select adhesives to be verified from the available adhesives; The first determining module is used to determine the first area ratio range based on the bottom area of the battery and the bonding parameters of the adhesive to be verified. The second determining module is used to determine the second area ratio range based on the bottom area of the battery, the thermal conductivity of the adhesive to be verified, and the thermal conductivity of the heating film. The third determining module is used to determine the third area ratio range based on the power density and heating efficiency of the heating film. The area ratio range is the ratio range of the heating film to the bottom area of the battery in the battery pack. The target selection module is used to select the adhesive to be verified as the target adhesive if there is an intersection between the first area ratio interval, the second area ratio interval and the third area ratio interval, and then prepare the battery pack based on the target adhesive.
9. A battery pack manufacturing apparatus, characterized in that, The device includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, the computer program being configured to implement the steps of the battery pack preparation method as described in any one of claims 1 to 7.
10. A storage medium, characterized in that, The storage medium is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by a processor, it implements the steps of the battery pack preparation method as described in any one of claims 1 to 7.
11. A battery pack, characterized in that, A heating film is provided at the bottom of the battery in the battery pack. The heating film, the battery, and the battery pack housing are bonded together by a selected adhesive. The proportion of the heating film to the bottom area of the battery in the battery pack is within the intersection range. The sum of the area occupied by the heating film and the area occupied by the adhesive is the same as the bottom area of the battery in the battery pack. The intersection range is the intersection of the first area proportion range, the second area proportion range, and the third area proportion range corresponding to the selected adhesive.