Counterweight assembly, power battery system and mobile carrier

Abstract

The embodiment of the invention provides a counterweight assembly, a power battery system and a mobile carrier, and the counterweight assembly comprises at least one limiting component which is detachably and fixedly arranged in an accommodating space of a carrier, and the limiting component defines at least one accommodating part for accommodating a loaded object in the accommodating space; wherein the limiting component has a preset weight, and the counterweight assembly comprising the limiting component is configured to be used for adjusting the bearing weight in the containing space so as to adjust the gravity center position of the carrier, so that a preset gravity center condition is met. Through the design of the detachable limiting components, a user can flexibly replace or rearrange the positions and the number of the limiting components according to specific requirements of different vehicle types, so that battery packs of various specifications can be quickly adapted, the universality of the system is greatly improved, and the application range of the system is greatly expanded.

Description

Technical Field

[0001] This disclosure relates to the field of power battery technology, and in particular to counterweight components, power battery systems, and mobile vehicles. Background Technology

[0002] With the continuous advancement of national new energy industry policies and the increasing environmental protection requirements, the electric forklift industry is accelerating its transformation from traditional lead-acid batteries to high-energy-density, long-cycle-life lithium batteries. This process is commonly referred to as "lead-acid to lithium battery conversion." However, in practical applications, the promotion of "lead-acid to lithium battery conversion" still faces many technical bottlenecks. Lead-acid batteries, due to their low energy density, are typically large and heavy, and forklift designs often optimize mechanical balance based on the weight distribution of lead-acid batteries. In contrast, while lithium batteries offer higher energy density and longer lifespan, their overall weight is significantly lower than lead-acid batteries of the same capacity. This can easily lead to insufficient vehicle weight and center of gravity shift, thus affecting the stability and operational safety of the mobile vehicle. Summary of the Invention

[0003] In view of the shortcomings of the prior art described above, the purpose of this disclosure is to provide a counterweight assembly, a power battery system, and a mobile vehicle to solve the problems in the related art.

[0004] The first aspect of this disclosure provides a counterweight assembly, comprising:

[0005] At least one limiting member is detachably fixed in the receiving space of a carrier, the limiting member defining at least one receiving portion for receiving the carried object in the receiving space;

[0006] The limiting member has a preset weight, and the counterweight assembly including the limiting member is configured to adjust the load-bearing weight in the accommodating space to adjust the center of gravity position of the carrier so as to meet the preset center of gravity condition.

[0007] In an embodiment of the first aspect, at least one counterweight is further included, which is detachably disposed on top of the limiting member for adjusting the weight of the counterweight assembly and suspending the counterweight above the load.

[0008] In an embodiment of the first aspect, the limiting member is positioned in conjunction with at least one of the counterweights.

[0009] In an embodiment of the first aspect, the limiting member and at least one of the counterweights are in a concave-convex fit.

[0010] In an embodiment of the first aspect, the limiting member is fitted with at least one of the counterweights.

[0011] In an embodiment of the first aspect, the top of the limiting member is provided with a support portion for supporting the cover of the accommodating space.

[0012] In the first aspect of the embodiment, the support portion is positioned and engaged with the cover.

[0013] In an embodiment of the first aspect, it further includes: a partition structure disposed within the inner wall of the receiving space to separate each of the receiving portions.

[0014] A second aspect of this disclosure provides a power battery system, comprising:

[0015] Battery compartment;

[0016] Multiple counterweight components as described in any one of the above;

[0017] Multiple battery packs are housed in the battery compartment within a receiving section formed by corresponding counterweight components.

[0018] Each of the counterweight components is configured with a weight relatively independently to adjust the center of gravity position of the battery compartment to meet a preset center of gravity condition.

[0019] A third aspect of this disclosure provides a mobile vehicle comprising the aforementioned power battery system.

[0020] The beneficial effects of this disclosure are as follows: By integrating the limiting function and the counterweight function into the same structure, that is, by using a limiting component with a certain mass as part of the counterweight assembly, the integration of the structure and the space utilization rate are improved. The design of the detachable limiting component allows users to flexibly replace or rearrange the position and quantity of the limiting component according to the specific requirements of different vehicle models, thereby quickly adapting to various battery pack specifications and greatly improving the system's versatility and applicability. Attached Figure Description

[0021] Figure 1 An exploded view of a counterweight component according to one embodiment of this disclosure is shown.

[0022] Figure 2 as well as Figure 3 A schematic diagram of the counterweight component is shown in several embodiments of this disclosure.

[0023] Figure 4 as well as Figure 5 Cross-sectional views of the counterweight components in several embodiments of this disclosure are shown respectively.

[0024] Figure 6 as well as Figure 7 Cross-sectional views of the counterweight assembly with counterweights are shown in several embodiments of this disclosure.

[0025] Figures 8 to 10Different cross-sectional views of the counterweight components are shown in several embodiments of this disclosure when the counterweight assembly has a partition structure. Detailed Implementation

[0026] The following specific examples illustrate the implementation of this disclosure. Those skilled in the art can easily understand other advantages and effects of this disclosure from the information disclosed herein. This disclosure can also be implemented or applied through other different specific embodiments, and various details in this disclosure can be modified or changed according to different viewpoints and application modules without departing from the spirit of this disclosure. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this disclosure can be combined with each other.

[0027] The embodiments of this disclosure will now be described in detail with reference to the accompanying drawings, so that those skilled in the art to which this disclosure pertains can readily implement it. This disclosure may be embodied in many different forms and is not limited to the embodiments described herein.

[0028] In this disclosure, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic represented in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. Furthermore, the specific features, structures, materials, or characteristics represented may be combined in any suitable manner in any one or a group of embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples represented in this disclosure, as well as the features of those different embodiments or examples.

[0029] Furthermore, the terms "first" and "second" are used for illustrative purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the representation of this disclosure, "a set" means two or more, unless otherwise explicitly specified.

[0030] For the purpose of clarity, devices unrelated to the description are omitted, and the same or similar components throughout the specification are given the same reference numerals.

[0031] Throughout this specification, when it is said that a device is "connected" to another device, this includes not only "direct connection" but also "indirect connection" by placing other components in between. Furthermore, when it is said that a device "comprises" a certain constituent element, unless otherwise stated otherwise, this does not exclude other constituent elements, but rather implies that other constituent elements may be included.

[0032] While the terms first, second, etc., are used in some examples herein to refer to various elements, these elements should not be limited by these terms. These terms are used only to distinguish one element from another. For example, first interface and second interface, etc., are used. Furthermore, as used herein, the singular forms “a,” “an,” and “the” are intended to also include the plural forms unless the context indicates otherwise. It should be further understood that the terms “comprising,” “including,” indicate the presence of features, steps, operations, elements, modules, items, kinds, and / or groups, but do not exclude the presence, occurrence, or addition of one or more other features, steps, operations, elements, modules, items, kinds, and / or groups. The terms “or” and “and / or” as used herein are interpreted as inclusive, or mean any one or any combination thereof. Thus, “A, B, or C” or “A, B, and / or C” means “any one of: A; B; C; A and B; A and C; B and C; A, B, and C.” Exceptions to this definition will only occur if the combination of elements, functions, steps, or operations is inherently mutually exclusive in some way.

[0033] The technical terms used herein are for reference only to specific embodiments and are not intended to limit the scope of this disclosure. The singular form used herein includes the plural form unless the statement explicitly indicates otherwise. The word "comprising" as used in this specification means to specify a particular characteristic, region, integer, step, operation, element, and / or component, and does not exclude the presence or addition of other characteristics, regions, integers, steps, operations, elements, and / or components.

[0034] Although not explicitly defined, all terms, including technical and scientific terms used herein, shall have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains. Terms defined in commonly used dictionaries shall be further interpreted as having a meaning consistent with the relevant technical literature and the message of the present disclosure, and shall not be over-interpreted as having an ideal or overly formulaic meaning unless otherwise defined.

[0035] During the conversion of electric forklifts from lead-acid to lithium batteries, lithium batteries have a higher energy density than lead-acid batteries, resulting in a lighter weight for the same capacity. This leads to a reduction in the overall weight of the vehicle and a change in the center of gravity. Different models or brands of equipment have different requirements regarding weight and center of gravity. Especially for mobile equipment, the center of gravity directly affects its stability and handling performance. If the battery pack is too light or improperly distributed, the center of gravity may be too high or shifted, increasing the risk of tipping over, especially during high-speed driving, sharp turns, or when carrying heavy loads.

[0036] To address the aforementioned issues, one embodiment of this disclosure provides a counterweight assembly, which includes at least one limiting member. The limiting structure is not only used for spatial positioning and limiting of the loaded object (such as a lithium battery pack) within a carrier (such as a battery compartment), but also has the function of adjusting weight distribution and optimizing the center of gravity, thereby achieving an integrated design of limiting and counterweight.

[0037] Specifically, please refer to the following: Figure 1 , Figure 2 as well as Figure 3 In one embodiment, at least one limiting member 100 is detachably fixed within a receiving space 210 of a carrier 200, and the limiting member 100 defines at least one receiving portion 110 in the receiving space 210 for receiving the carried object 300.

[0038] Figure 2 and Figure 3 Examples are shown where the top surface of the limiting member 100 is flush with the top surface of the carrier 200 and where the top surface of the limiting member 100 is lower than the top surface of the carrier 200. Figure 4 as well as Figure 5 They are respectively Figure 2 as well as Figure 3 The cross-sectional view shows that the height of the limiting member is determined according to the height of the object being carried, and the height of the object being carried 300 is not higher than the height of the carrier 200, so that the object being carried is always confined within the accommodating space 210.

[0039] Optionally, in Figure 4 In this embodiment, the top of the limiting member 100 is provided with a support portion 101 for supporting the cover 201 above the accommodating space 210. The support portion 101 can be a raised platform, an annular support edge, a partially raised area, or a support platform with grooves, etc. The support portion 101 is located above the accommodating space 210 and is used to support the cover 201 covering the accommodating space 210; the cover 201 can be a battery compartment cover, a protective cover, or other functional cover 201. The arrangement between the cover 201 and the housing is similar to the relationship between the seat and battery compartment of an electric bicycle; the cover 201 and the housing do not necessarily need to be fixedly fitted. Therefore, the function of the support portion 101 is to support the cover, preventing it from pressing against the battery pack. The support portion 101 not only bears the weight of the cover 201 but also serves as a positioning reference during the installation of the cover 201. Figure 4 as well as Figure 5 In the example, the limiting member 100 has a U-shaped groove structure, in Figure 4 In this embodiment, the top end of the limiting member 100 forms the support portion 101 to support the cover 201. Optionally, as... Figure 5As shown in the example, when there is a height difference between the top end of the limiting member 100 and the top end of the carrier 200, the cover 201 is supported by the top end of the carrier 200.

[0040] In some embodiments, the limiting member 100 may be made of a metallic material (such as cast iron, steel, or aluminum alloy), giving it both good structural strength to limit the space of the lithium battery pack and the ability to function as an effective counterweight module due to its preset weight. The limiting member 100 is detachably installed in different locations within the battery compartment, allowing for flexible replacement or rearrangement according to the specific vehicle model requirements. Each limiting member 100 can be designed in different shapes (such as L-shaped, U-shaped, or block-shaped) to accommodate lithium battery packs of different sizes.

[0041] In some embodiments, the counterweight assembly including the limiting member 100 is configured to adjust the load-bearing weight within the accommodating space 210 to adjust the center of gravity position of the carrier 200 to meet a preset center of gravity condition. Specifically, by selecting limiting members 100 of different weights or by arranging multiple limiting members 100 in different areas of the accommodating space 210, the local weight distribution within the battery system can be controlled. The goal of counterweight adjustment is to bring the center of gravity position of the entire carrier 200 (such as an electric forklift) to the ideal state required by the design, such as meeting requirements for vehicle stability, operational safety, and mechanical balance. The "preset center of gravity condition" is usually set by the vehicle manufacturer based on factors such as vehicle structure, load characteristics, and operating conditions.

[0042] Optionally, please refer to the following as well. Figures 6-10 In this embodiment, the counterweight assembly further includes at least one counterweight 120, which is detachably disposed on the top of the limiting member 100 for adjusting the weight of the counterweight assembly and suspending the counterweight 120 above the load 300.

[0043] As an example, in Figure 6 In this embodiment, the counterweight 120 is supported on the top of the limiting member 100, allowing the user to quickly replace the counterweight 120 with different weights as needed to adapt to different center of gravity adjustment requirements. A series of counterweights 120 with different weights are designed and prepared. According to actual needs, counterweights 120 of appropriate weights can be selected for combination. If the total weight under the current configuration is insufficient to achieve the preset center of gravity condition, more counterweights 120 can be added to increase the overall weight; conversely, if the total weight is too large, some counterweights 120 can be removed to reduce the weight.

[0044] Among them, Figure 6 as well as Figure 7This embodiment illustrates one method of fixing a counterweight 120 to a limiting member 100, wherein the limiting member 100 and at least one of the counterweights 120 are fitted together: the limiting member 100 has a threaded hole at its top, while the counterweight 120 has a matching threaded post 102 at its bottom. Align the threaded post 102 at the bottom of the counterweight 120 with the threaded hole on the limiting member 100; use a wrench or other tool to rotate the counterweight 120 until it fits tightly against the limiting member 100; to disassemble, rotate in the opposite direction to loosen the connection. The positions of the threaded hole and the threaded post 102 can be reversed, i.e., the threaded post 102 can be placed on the top of the limiting member 100, and the threaded hole can be placed on the counterweight 120. In some embodiments, the counterweight 120 may also have a through hole instead of a threaded hole, and the threaded post 102 on the limiting member 100 passes through the through hole and is fixed by a nut.

[0045] As an example, the limiting member 100 is positioned in conjunction with at least one of the counterweights 120, such as the limiting member 100 and the at least one of the counterweights 120 being in a concave-convex fit.

[0046] The limiting member 100 has at least one protrusion on its top; correspondingly, the counterweight 120 has a matching groove structure on its bottom. During installation, the counterweight 120 is aligned and pressed down onto the limiting member 100, so that the protrusion is embedded in the groove, forming a convex-concave fit. This structure not only provides initial positioning but also effectively prevents the counterweight 120 from shifting laterally or rotating during use. The positions of the protrusion and groove can be interchanged between the limiting member 100 and the counterweight 120.

[0047] Optionally, in equipment such as electric forklifts, where there are multiple battery models or situations requiring the simultaneous installation of both the main battery and auxiliary power modules, the traditional single-seat space 210 is insufficient to meet diverse installation needs. Therefore, a partition structure 130 is introduced; please refer to this section for further details. Figures 8 to 10 In this embodiment, the partition structure 130 is disposed within the inner wall of the accommodating space 210, separating each of the accommodating portions 110. This enables independent positioning and counterweight adjustment of multiple battery modules, ensuring that the accommodating portions 110 do not interfere with each other.

[0048] As an example, in Figure 8 In this example, the separating member 130 is implemented as a partition. When the weight of the objects 300 in the multiple receptacles 110 is the same, the center of gravity and weight of the entire counterweight assembly can be adjusted by setting a counterweight 120, wherein the counterweight 120 evenly covers the top of each receptacle 110 to prevent the center of gravity from shifting between the receptacles 110. The weight of the counterweight assembly can be adjusted by adjusting the weight of the counterweight 120.

[0049] Alternatively, the weight of the counterweight assembly can be adjusted by setting multiple counterweights 120. If the weight of each load is the same, the weight of each counterweight 120 can be set to be the same, so that the adaptability of the counterweight 120 is higher.

[0050] For example Figure 9 and Figure 10 As shown, if the weight of each loaded object differs, counterweights complementary to the weight of each object are selected to ensure a relatively balanced overall weight across the areas containing each object. For example, the lighter the object, the heavier the corresponding counterweight. Figure 9 and Figure 10 In this system, different counterweights are achieved by varying the number or weight of the counterweight plates.

[0051] like Figure 9 The example shown uses a single, heavier counterweight for weight distribution. To differentiate them, assuming the materials have the same density, the leftmost object has the smallest volume and weight, while the corresponding counterweight, which may have the largest weight, is displayed as having the largest volume.

[0052] Or, in Figure 10 In the embodiments, when the weights of the objects 300 in the receiving portion 110 are not the same, the same weight but different number of counterweights 120 can be applied to different receiving portions 110 according to the preset center of gravity conditions to satisfy the center of gravity conditions.

[0053] It is worth mentioning that, in Figure 8 In the embodiment, the weight of the counterweight assembly can also be changed by changing the number of counterweights 120 so that the center of gravity of the entire counterweight assembly meets the preset center of gravity condition.

[0054] Furthermore, in some embodiments, when the limiting member 100 is provided with the separating member 130, when a suitable counterweight 120 is selected according to the weight of the object 300 in each receiving part 110, in order to ensure the stable fixation of the counterweight 120 and prevent the counterweight 120 from shaking during the movement of the counterweight assembly, it is possible to refer to... Figure 9 as well as Figure 10 The partition member 130 for supporting the two counterweights 120 is configured to accommodate two threaded posts 102, so that the counterweights 120 are fixed to the partition member 130 by means of the threaded posts 102.

[0055] Please refer to the following for further details. Figures 6 to 10In this embodiment, in order to ensure that the covering of the cover 201 is not affected, when the counterweight 120 is fixed by the threaded post 102, the height of the threaded post 102 connected to the limiting member should not be higher than the carrier 200. Therefore, the height of the limiting member or the height of the threaded post can be adjusted so that the combination does not affect the normal use of the cover 201.

[0056] In another embodiment of this disclosure, a power battery system is provided, comprising: a battery compartment; a plurality of counterweight components as described in any of the above embodiments; and a plurality of battery packs disposed in a receiving portion 110 formed by corresponding counterweight components in the battery compartment.

[0057] Specifically, the battery compartment is a shell structure with a storage space, typically located in the chassis area of ​​an electric vehicle or industrial equipment. Each counterweight assembly includes at least one limiting member and optional counterweights. The limiting member is fixed to different areas inside the battery compartment and, together with the inner wall of the battery compartment, defines a receiving portion 110 for accommodating the battery pack. Each counterweight assembly is independently configured, and its counterweight parameters can be adjusted according to actual needs. The battery pack (e.g., lithium battery packs of different capacities and sizes) is installed in the corresponding receiving portion 110, positioned and supported by the limiting member, and its weight is locally adjusted by the counterweights. Each counterweight assembly is configured with a weight relatively independently to adjust the center of gravity position of the battery compartment to meet preset center of gravity conditions.

[0058] The above embodiments are merely illustrative of the principles and effects of this disclosure and are not intended to limit this disclosure. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this disclosure. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this disclosure should still be covered by the protection scope of this disclosure.

Claims

1. A counterweight assembly, characterized in that, include: At least one limiting member is detachably fixed in the receiving space of a carrier, the limiting member defining at least one receiving portion for receiving the carried object in the receiving space; The limiting member has a preset weight, and the counterweight assembly including the limiting member is configured to adjust the load-bearing weight in the accommodating space to adjust the center of gravity position of the carrier so as to meet the preset center of gravity condition.

2. The counterweight assembly according to claim 1, characterized in that, It also includes at least one counterweight, which is detachably disposed on top of the limiting member for adjusting the weight of the counterweight assembly and suspending the counterweight above the load.

3. The counterweight assembly according to claim 2, characterized in that, The limiting component is positioned and engaged with at least one of the counterweights.

4. The counterweight assembly according to claim 2, characterized in that, The limiting member and at least one of the counterweights are in a concave-convex fit.

5. The counterweight assembly according to claim 2, characterized in that, The limiting member is fitted with at least one of the counterweights.

6. The counterweight assembly according to claim 1, characterized in that, The top of the limiting member is provided with a support portion for supporting the cover of the accommodating space.

7. The counterweight assembly according to claim 6, characterized in that, The support portion is positioned and engaged with the cover.

8. The counterweight assembly according to claim 1, characterized in that, Also includes: A partition structure is provided within the inner wall of the accommodating space to separate each of the accommodating parts.

9. A power battery system, characterized in that, include: Battery compartment; Multiple counterweight components as described in any one of claims 1 to 8; Multiple battery packs are housed in a compartment within the battery chamber, which is formed by corresponding counterweight components. Each of the counterweight components is configured with a weight relatively independently to adjust the center of gravity position of the battery compartment to meet a preset center of gravity condition.

10. A mobile vehicle, characterized in that, Includes the power battery system described in claim 9.

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