A power battery casing, a power battery pack, and an installation method thereof.

Abstract

This invention relates to the field of batteries, specifically to a power battery casing, a power battery pack, and an installation method thereof. The casing includes an outer shell composed of an outer shell layer and an inner shell layer. The inner shell layer has a cavity for accommodating a battery cell assembly. The inner wall of the cavity is provided with a plastic insulating component, and a buffer component is also provided on the surface of the insulating component. Both the outer and inner shell layers are plastic insulating structural components. The casing contains a battery cell assembly comprising several battery cells. By setting the battery pack casing to a double-layer structure, if a collision or shaking damages the battery pack casing, only the outermost outer shell layer needs to be replaced, without affecting the overall sealing performance of the battery pack. This results in good economic efficiency, reduced maintenance costs, and the battery pack casing is made of PVC material, which has low density and thin walls, enabling lightweight design.

Description

Technical Field

[0001] This invention relates to the field of batteries, and in particular to a power battery casing, a power battery pack, and a method for installing the same. Background Technology

[0002] The drone industry is a sub-sector aligned with the national high-tech pillar industry development plan and is considered a sunrise industry. Large drones hold a crucial position within the overall drone industry, with wide applications in aerial photography, delivery, pesticide spraying, and firefighting. Battery packs (hereinafter referred to as "battery packs") serve as the energy source for large drones and play a vital role in the large drone industry. Currently, high-energy-density, wide-temperature-range, and high-safety battery packs are the target of intense competition within the industry, primarily aimed at extending the flight range of large drones.

[0003] The higher the weight ratio of the battery pack in a large drone, the greater its flight range. When the energy density of a single battery cell and the weight that the entire large drone can contribute to the battery pack are fixed, lightweight design of the battery pack structure is an important way to improve the weight energy density of the battery pack.

[0004] Most battery packs on the market are designed with metal sealed shells or thick plastic sealed shells, which have very low energy density by weight, at the cost of reducing the drone's flight range, and are also more expensive, with a higher unit price for small-batch production. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies:

[0006] 1. The casing of the drone battery pack is too heavy and has high manufacturing and maintenance costs;

[0007] 2. Damage to the outer casing of the drone battery pack reduces its sealing performance, allowing moisture or metal debris to enter the battery pack.

[0008] 3. Traditional drone battery packs often use metal or thick plastic shells, resulting in low energy density and an inability to achieve lightweight design, which leads to shorter drone flight time.

[0009] 4. The battery pack is inconvenient to handle, and the handle on the battery pack shakes during use, causing instability and uneven force during movement. The handle may also directly apply force to the internal cells of the battery pack, and the corners of the cell assembly may be subjected to force when the user tilts and lifts the pack, which may cause damage to the battery pack.

[0010] In summary, a power battery housing, a power battery pack, and a method for installing the power battery pack are provided.

[0011] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0012] A power battery casing includes an outer shell, which includes an outer shell layer and an inner shell layer that are fitted together. The inner shell layer has a cavity for accommodating a battery cell assembly. An insulating component is provided on the inner wall of the cavity, and a buffer component is also provided on the surface of the insulating component. The outer shell layer and the inner shell layer are plastic insulating structural components.

[0013] This invention relates to a power battery casing, which is formed by connecting two parts: an outer casing and an inner casing. The outer surface of the inner casing abuts against the inner surface of the outer casing. This design allows for easy replacement of only the outermost outer casing if the battery pack is damaged or scratched during drone operation due to collisions or shaking. This does not affect the overall sealing of the battery pack, resulting in good economic efficiency and reduced maintenance costs. Furthermore, the battery pack casing is made of plastic insulating material, which, compared to metal, has a lower density and thinner wall thickness, enabling lightweight design. Cushioning components are incorporated on the surface of the insulating parts to prevent damage or breakage from external impacts. These cushioning components are typically made of soft materials such as rubber or foam plastic, providing cushioning and shock absorption while increasing the durability and lifespan of the insulating parts. In electrical equipment and power lines, the cushioning design of insulating components is crucial, effectively protecting the safe operation of equipment and lines, reducing maintenance costs and failure rates.

[0014] As a preferred embodiment of the present invention, the outer shell layer and the inner shell layer have the same shape, and the inner surface of the outer shell layer is attached to the outer surface of the inner shell layer. This arrangement ensures the overall volume of the shell after the outer shell layer and the inner shell layer are assembled.

[0015] As a preferred embodiment of the present invention, the outer shell material is PVC.

[0016] As a preferred embodiment of the present invention, the insulating component includes a plurality of insulating sheets disposed on the inner wall of the cavity, which improves the safety of the battery pack and provides a fixing effect for subsequent installation.

[0017] As a preferred embodiment of the present invention, all the insulating sheets are respectively disposed at both ends of the chamber to improve the safety of the battery pack.

[0018] As a preferred embodiment of the present invention, the buffer component is disposed on the inner wall of the cavity to improve the safety of the battery pack.

[0019] A power battery pack includes the aforementioned power battery casing, wherein a battery cell group consisting of a plurality of battery cells is disposed within the casing.

[0020] This invention relates to a power battery pack. By placing the battery pack within a double-layered outer shell (i.e., an outer shell and an inner shell), if the drone battery pack is damaged or scratched during operation due to collision or shaking, only the outermost outer shell needs to be replaced. This does not affect the overall sealing of the battery pack, resulting in good economic efficiency and reduced maintenance costs. Furthermore, insulating and buffer components are provided between the outer shell and the internal battery cell assembly, ensuring the safety of the battery pack.

[0021] As a preferred embodiment of the present invention, the battery cell assembly is provided with a handle strap that wraps around the battery cell assembly, and the handle strap passes through the insulating sheets provided at both ends of the outer shell, making it convenient for the user to take it.

[0022] As a preferred embodiment of the present invention, one end of the battery cell assembly is provided with a connecting line, and the connecting line is aligned with the direction of the handle strap. This arrangement allows the user to easily pick up the power battery pack during operation via the handle strap, and placing the handle strap at the end of the battery cell assembly with the connecting line ensures that the battery pack can be placed stably.

[0023] As a preferred embodiment of the present invention, the handle strap is a through-type design, and the handle strap is provided with a connecting ring. The connecting ring is offset. The through-type design makes the handle strap more evenly stressed during use, and the offset design of the connecting ring on the handle strap is to avoid direct contact between the hand and the connecting ring, thereby improving the comfort of use.

[0024] As a preferred embodiment of the present invention, a section of the handle strap located inside the battery pack is positioned between two adjacent battery cell groups, which ensures that the surface of the battery pack is flatter after the handle strap and battery cells are installed.

[0025] As a preferred embodiment of the present invention, the upper end of the battery cell assembly is provided with a mica plate, and the mica plate is provided with a plurality of copper busbars, which are used to realize electrical connection, and the mica plate is provided to realize insulation between the copper busbars.

[0026] As a preferred embodiment of the present invention, the insulating components refer to: insulating sheet I, insulating sheet II, insulating sheet III, and insulating sheet IV, respectively;

[0027] Insulating sheet I: The insulating sheet I is located on the side facing the handle of the battery pack, and the insulating sheet I has a first through hole for the handle strap to pass through. There are two sets of the first through holes, with at least two in each set. This arrangement allows for better fixation of the handle strap while providing insulation.

[0028] Insulating sheet II: The insulating sheet II is disposed on both sides of the battery cell assembly, and no buffer component is disposed between the insulating sheet II and the battery cell assembly;

[0029] Insulating sheet III: The insulating sheet III is located on the upper and lower sides of the cell assembly. This arrangement helps to improve the flatness of the battery pack exterior and facilitates connection.

[0030] Insulating sheet IV: The insulating sheet IV is located on the side of the battery cell assembly where the connecting wires are located;

[0031] Insulating sheet V: The insulating sheet V is located on the opposite end face of the insulating sheet I, and the insulating sheet V is also provided with a second through hole for the handle strap to pass through. The second through hole is provided in two sets, with at least two in each set. This arrangement is used to better fix the handle strap and ensure that the battery cell is not strangled by the handle strap, resulting in uneven force.

[0032] Insulating sheet VI: The insulating sheet VI is disposed between each of the battery cell groups, and at the same time serves to protect the edges and corners of the battery cell groups while providing insulation;

[0033] As a preferred embodiment of the present invention, the insulating sheet VI is disposed between each of the battery cell groups and is in the form of a strip. The insulating sheet VI is located at the corner of each of the battery cell groups. It is set in the form of a strip in order to reserve a certain space for the expansion of the battery cells, and the insulating sheet VI is placed at the corner of the battery cell group to protect the corner of the battery cell group.

[0034] As a preferred embodiment of the present invention, the insulating sheet I is provided with a plurality of connection holes, which are used for the connecting wires installed in the battery cell assembly to pass through, thereby making the wiring more convenient.

[0035] As a preferred embodiment of the present invention, the connecting hole is provided with a protective coil on the side of the insulating sheet I facing inward. This arrangement prevents the connecting wire from being damaged due to friction with the edge of the connecting hole when passing through the connecting hole.

[0036] As a preferred embodiment of the present invention, the buffer component includes a plurality of buffer plates disposed between the battery cells, and also includes a plurality of buffer plates disposed between the insulating component and the battery cells. This arrangement allows the battery pack to both reserve space for the expansion of the battery cells and fix the overall structure of the battery pack through the buffer plates.

[0037] As a preferred embodiment of the present invention, the buffer components refer to buffer sheet I, buffer sheet II, buffer sheet III, and buffer sheet IV, respectively;

[0038] Buffer plate I: The buffer plate I is strip-shaped and parallel to the handle strap. The buffer plate I is located between each of the battery cells. This arrangement helps to reserve space for the expansion of the battery cells during the use of the battery pack.

[0039] Buffer sheet II: The buffer sheet II is located between the insulating sheet III and the battery cell assembly;

[0040] Buffer sheet III: The buffer sheet III is located on the upper end face of the battery cell assembly and is disposed between the insulating sheet III and the insulating sheet IV;

[0041] Buffer sheet IV: The buffer sheet IV is located between the insulating sheet V and the cell assembly. This arrangement helps to allow space for cell expansion during battery pack use.

[0042] As a preferred embodiment of the present invention, the buffer sheet IV has slots on both sides for the handle strap on the outside of the battery cell assembly to pass through. There are two sets of slots, with at least two in each set. This ensures that the handle strap will not directly apply too much force to the battery cell when it is under stress, and that the buffer sheet IV provides space for the expansion of the battery cell without hindering the connection of the handle strap.

[0043] As a preferred embodiment of the present invention, the positions of the first through hole and the second through hole respectively opened on the insulating sheet I and the insulating sheet V in the insulating component correspond one-to-one with the positions of the slots opened on the buffer sheet IV in the buffer component. This ensures that the handle strap will not deviate when passing through the first through hole, the slot and the second through hole in sequence, and can be tightly attached to one side of the battery cell assembly, so as to ensure the stability of the battery pack during subsequent use.

[0044] A method for installing a power battery pack, comprising the aforementioned power battery pack, wherein the installation method is as follows:

[0045] S1. Assemble several battery cells to form a battery cell assembly;

[0046] S2. Buffer components and insulating components are installed inside the battery pack;

[0047] S3. Then insert the carrying handle;

[0048] S4. After the handle strap is installed, the battery cell assembly is added to the side of the handle strap facing outward;

[0049] S5. After completion, the assembled battery cell assembly is brought into contact with the inner surface of the inner layer of the outer casing, and then the inner layer of the outer casing is brought into contact with the inner surface of the outer layer of the outer casing.

[0050] This invention relates to a method for installing a power battery pack. First, two individual battery cells are joined together to form a cell assembly. Since this battery pack is suitable for large devices, such as large drones, and considering that a single battery cell is 6.4mm thick, 171mm wide, and 205mm high, it is considered extra-large among aluminum-plastic film soft-pack battery cells, this stacking method is adopted because the packaging process for a single battery cell is not suitable for making it too large. Therefore, by forming cell assemblies from two individual cells, space is saved. Subsequently, several assembled cell assemblies are joined together to form a battery module. Insulating and buffering components are installed to ensure insulation and allow space for cell expansion, while also ensuring the flatness of the assembled battery pack. The handle is installed simultaneously with the cell assembly, buffering components, and insulating components. Finally, the outer cell assembly is installed. After the internal structure of the battery pack is completed, it is installed inside the inner layer of the outer shell, which then encloses the internal structure. The outer outer layer is then installed outside the inner layer to protect the battery pack. If the battery pack outer shell is damaged, only the outer outer layer needs to be replaced, saving costs.

[0051] As a preferred embodiment of the present invention, the positions of the insulating component and the buffer component in step S2 are as follows: a buffer sheet I is provided between each adjacent cell group, and an insulating sheet I and an insulating sheet V are provided at both ends of the cell group respectively. Furthermore, a buffer sheet IV is provided between the insulating sheet V and the cell group. The buffer sheet I is provided between adjacent cell groups to reserve a certain position for the cell expansion when the cell group is working.

[0052] In a preferred embodiment of the present invention, in step S4, an insulating sheet VI is provided between the battery cell assembly and the handle strap, and an insulating sheet II is provided at the outermost outward end of the battery cell assembly. An insulating sheet IV, a buffer sheet III, and an insulating sheet III are sequentially provided on the upper surface of the battery cell assembly, and a buffer sheet II and an insulating sheet III are sequentially provided on the lower surface of the battery cell assembly. This arrangement is to prevent short circuits between the positive and negative terminals of the battery, ensuring safe battery use. The insulating sheets can isolate the positive and negative terminals of the battery, preventing them from directly contacting and short-circuiting, thereby avoiding safety accidents such as battery overheating and explosion. Furthermore, the insulating sheets also serve to secure the battery.

[0053] As a preferred embodiment of the present invention, inserting the handle strap in step S3 includes the following steps:

[0054] Step S31: One end of the handle strap first passes through one of the first through holes in the insulating sheet I, and then passes through the first through hole through the corresponding slot on the buffer sheet IV until one end of the handle strap passes through the second through hole on the insulating sheet V corresponding to the position of the first through hole;

[0055] Step S32: One end of the handle strap is then inserted through one of the second through holes in another set and sequentially passes through the corresponding slot and the first through hole;

[0056] Step S33: The handle strap starts from the first through hole, passes through the first through hole in the same group, and then passes through the corresponding slot and the second through hole in sequence;

[0057] Step S34: The handle strap starts from the second through hole and passes through one of the other set of second through holes, then passes through the corresponding slot and the first through hole in sequence, and finally connects to the connecting ring to complete the connection of the handle strap. This arrangement makes the handle strap a through connection inside the battery pack, and the force is more even during the lifting process.

[0058] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0059] 1. This invention relates to a power battery casing. By setting the battery pack's outer shell to a double-layer form (outer outer shell and inner outer shell), the inner outer shell protects and fixes the internal structure of the battery pack, while the outer outer shell, fitted over the outer end of the inner outer shell, provides protection. This ensures that even if the casing is damaged due to shaking or collision during drone flight or battery pack handling, it will not directly affect the performance of the battery pack. When damage occurs, only the outer outer shell needs to be replaced. Since the outer outer shell is made of PVC tubing, which is inexpensive, this reduces the maintenance cost of the battery pack.

[0060] 2. This invention relates to a power battery casing. Because the battery pack casing uses a tubing, the cost is low. The tubing is made of PVC, which has low density and thin walls, enabling lightweight design and reducing the overall weight of the battery pack, further reducing the overall weight of the drone and extending its flight time.

[0061] 3. The present invention is a power battery pack. By wrapping the internal structure of the battery pack with an inner outer shell and then wrapping the inner outer shell with an outer outer shell, if the outer outer shell is damaged, the internal structure of the battery pack can be protected by the inner outer shell, so there will be no reduction in sealing. Thus, moisture or metal debris cannot enter the battery pack, and the battery pack can still work normally, improving safety.

[0062] 4. This invention relates to a power battery pack. By using a through-type handle and an insulating sheet and a buffer sheet between the handle and the force-bearing surface of the battery cell assembly, the battery pack becomes more stable during lifting and moving, and the force-bearing surface of the battery cell assembly is increased, preventing damage to the battery cell assembly inside the battery pack. Insulating sheets VI are also provided at the corners of the battery cell assembly to prevent stress on the corners of the battery cell assembly when lifting at an angle, thus improving the structural stability and safety of the battery pack.

[0063] 5. This invention relates to a method for installing a power battery pack. First, the large surfaces of two individual cells are joined together to form a cell assembly. Since this battery pack is suitable for large devices, such as large drones, and considering that a single cell is 6.4mm thick, 171mm wide, and 205mm high, it is considered extra-large among aluminum-plastic film soft-pack cells, this stacking method is adopted because the packaging process of a single cell is not suitable for making it too large. Therefore, by forming cell assemblies from two individual cells, space is saved. Subsequently, several assembled cell assemblies are joined together to form a battery module. The battery pack is assembled with insulating and buffer components to ensure insulation, allow space for cell expansion, and maintain flatness after assembly. The handle is installed simultaneously with the cell assembly, buffer components, and insulating components. Finally, the outer cell assembly is installed. After the internal structure of the battery pack is completed, it is installed inside the inner layer of the outer shell, which then encloses the internal structure. The outer outer layer is then installed outside the inner layer to protect the battery pack. If the battery pack casing is damaged, only the outer outer layer needs to be replaced, saving costs. Attached Figure Description

[0064] Figure 1 This is a schematic diagram of the installation process of the present invention;

[0065] Figure 2 This is a schematic diagram of the structure of the present invention;

[0066] Figure 3 This is a structural diagram of the internal frame of the battery pack of the present invention;

[0067] Figure 4 This is an isometric view of the internal frame structure of the battery pack of the present invention;

[0068] Figure 5 This is a schematic diagram of the exploded structure of the battery pack of the present invention;

[0069] Figure 6 This is a schematic diagram of the handle strap connection method of the present invention.

[0070] Icons: 1-Outer shell; 2-Handle strap; 3-Coil guard; 4-Connector ring; 5-Insulating sheet I; 6-Cell assembly; 7-Insulating sheet II; 8-Insulating sheet III; 9-Insulating sheet IV; 10-Insulating sheet V; 11-Insulating sheet VI; 12-Buffer sheet I; 13-Buffer sheet II; 14-Buffer sheet III; 15-Buffer sheet IV; 16-Mica board; 17-Copper busbar; 18-Connecting wire; 101-Outer shell layer; 102-Inner shell layer; 51-First through hole; 52-Connecting hole; 61-Cell; 103-Second through hole; 151-Slot. Detailed Implementation

[0071] The present invention will now be described in detail with reference to the accompanying drawings.

[0072] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0073] Example 1

[0074] A power battery casing includes an outer shell 1, which is composed of an outer shell layer 101 and an inner shell layer 102. The outer surface of the inner shell layer 102 abuts against the inner surface of the outer shell layer 101, thereby achieving mutual insertion of the outer shell layer 101 and the inner shell layer 102. The inner shell layer 102 has a chamber for accommodating a battery cell assembly 6. The inner wall of the chamber is provided with a plastic insulating component, and the surface of the insulating component is also provided with a buffer component. The outer shell 1 is made of plastic insulating material. By setting the outer shell 1 to a structure obtained by assembling the outer shell layer 101 and the inner shell layer 102, and the inner shell layer 102 and the outer shell layer 101 being mutually inserted and spliced, the internal battery is actually wrapped by the inner shell layer 102, while the outer shell layer 101 wraps the inner shell layer 102. When the outer shell 1 is damaged, the damage to the outer shell layer 101 does not affect the internal inner shell layer 102 and the battery. Since the outer shell 1 is made of plastic insulating material, it reduces the cost if replacement is needed after damage.

[0075] The outer shell 101 and the inner shell 102 described above have the same shape, and the inner surface area of ​​the outer shell 101 is the same as the outer surface area of ​​the inner shell 102. Since the outer shell 101 needs to be nested with the inner shell 102, this arrangement ensures that the overall size of the outer shell 101 remains unchanged and is the same as the size of the inner shell 102 after nesting. Furthermore, after the battery pack is installed in the drone, there will be no difference in size after nesting, thus avoiding excessive space occupation.

[0076] The aforementioned insulating components include several insulating sheets disposed on the inner wall of the chamber. This arrangement prevents short circuits between the positive and negative terminals of the battery, ensuring safe battery use. The insulating sheets isolate the positive and negative terminals of the battery, preventing them from directly contacting and short-circuiting, thereby avoiding safety accidents such as battery overheating and explosion. In addition, the insulating sheets also serve to secure the battery.

[0077] All of the aforementioned insulating sheets are respectively disposed at both ends of the chamber.

[0078] The aforementioned buffer components are installed on the inner wall of the cavity, which ensures the heat insulation of the battery pack.

[0079] Example 2

[0080] like Figure 2 and Figure 5 The power battery pack shown includes a battery cell assembly 6 composed of several battery cells 61 disposed within a housing 1. The housing 1 consists of an outer housing layer 101 and an inner housing layer 102, with the outer surface of the inner housing layer 102 abutting against the inner surface of the outer housing layer 101, thus achieving mutual nesting of the outer housing layer 101 and the inner housing layer 102. The inner housing layer 102 has a chamber for accommodating the battery cell assembly 6, and the inner wall of the chamber is provided with a plastic insulating component. The surface of the insulating component is also provided with a cushioning component. The battery cell assembly 6 is enclosed by the inner housing layer 102 disposed outside the battery cell assembly 6. The outer shell 101, located outside the inner shell 102, serves to fix the battery pack and protect it from damage such as collisions that could reduce its sealing performance. An insulating component is provided between the inner surface of the inner shell 102 and the cell assembly 6, which not only provides insulation but also improves the flatness of the battery pack shell, enhances the stability of the product dimensions, and strengthens the protection of individual cells. A buffer component is also provided between the insulating component and the cell assembly 6, which provides space for cell expansion and provides fixed support for the internal structure of the battery pack.

[0081] The aforementioned battery cell assembly 6 is provided with a handle strap 2 that wraps around the battery cell assembly 6. The handle strap 2 passes through both ends of the outer shell 1 to facilitate user handling.

[0082] The aforementioned battery cell assembly 6 has a connecting line 18 at one end, and the connecting line 18 faces the same direction as the handle strap 2. By providing a handle strap 2 to wrap around the battery cell assembly 6, it is convenient for users to carry and take it. The handle strap 2 faces the same direction as the connecting line 18 to avoid the phenomenon of instability when the battery pack is placed.

[0083] The aforementioned handle strap 2 is a through-type design, and a connecting ring 4 is provided on the handle strap 2. The connecting ring 4 is offset. The through-type connection of the handle strap 2 is to prevent the handle strap 2 from directly applying force to the battery cell assembly 6 during use and to avoid stress on the corners of the battery cell assembly 6 when the battery pack is lifted in a tilted direction. The connecting ring 4 is provided for user portability, allowing the user to suspend the battery pack for easy carrying and retrieval. The offset design of the connecting ring 4 is for user comfort, preventing the user's palm from directly contacting the connecting ring 4 when holding the handle strap 2, thus preventing discomfort caused by direct contact between the user's palm and the connecting ring 4. Figure 5-6 As shown.

[0084] The aforementioned handle strap 2 is located inside the battery pack, between two adjacent battery cell groups 6. The battery cell group 6 clamps the handle strap 2, ensuring the flatness of the battery pack and improving its stability.

[0085] The aforementioned battery cell assembly 6 has a mica plate 16 at its upper end, and the mica plate 16 has several copper busbars 17, such as... Figure 5 As shown.

[0086] The aforementioned insulating components refer to: insulating sheet I5, insulating sheet II7, insulating sheet III8, and insulating sheet IV9, respectively.

[0087] Furthermore, the insulating sheet I5 is located on the side of the battery cell assembly 6 facing the handle, and the insulating sheet I5 has a first through hole 51 for the handle strap 2 to pass through. The first through hole 51 has two sets, with at least two in each set. The insulating sheet I5 plays a limiting role for the battery cell assembly 6. The two sets of first through holes 51 on the insulating sheet I5 ensure that the handle strap 2 can be tightly attached to the side of the battery cell assembly 6 during the subsequent connection process.

[0088] Furthermore, the insulating sheet II7 is disposed on both sides of the battery cell assembly 6, and no buffer component is disposed between the insulating sheet II7 and the battery cell assembly 6. In addition to the insulation effect, the insulating sheet II7 is disposed on the sides of the battery cell assembly 6 to ensure the flatness of the battery pack sides.

[0089] Furthermore, the insulating sheet III8 is located on the upper and lower sides of the cell assembly 6, which also serves to ensure the flatness of the battery pack and to isolate the cell assembly 6 from the inner layer 102 of the outer shell.

[0090] Furthermore, the insulating sheet IV9 is located on the side of the battery cell assembly 6 where the connecting wire is located;

[0091] The aforementioned insulating component further includes: insulating sheet V and insulating sheet VI, wherein:

[0092] Insulating sheet V: The insulating sheet V is located on the opposite end face of the insulating sheet I, and the insulating sheet V is also provided with a second through hole for the handle strap to pass through, and the second through hole is provided in two sets, with at least two in each set;

[0093] Insulating sheet VI: The insulating sheet VI is disposed between each of the battery cell groups;

[0094] Furthermore, the insulating sheet V10 is located on the opposite end face of the insulating sheet I5, and the insulating sheet V10 is also provided with a second through hole 103 for the handle strap 2 to pass through. The second through hole 103 is provided in two sets, with at least two in each set. This arrangement serves to limit the position of the battery pack 6, and the two sets of at least two second through holes 103 on the insulating sheet V10 facilitate the subsequent passage of the handle strap 2 through the first through hole 51 and then through the second through hole 103, thus supporting the battery pack 6 during the user's lifting process.

[0095] Furthermore, the insulating sheet VI11 is disposed between each of the battery cell groups 6. This arrangement, in addition to insulation, also helps to protect the corners of the battery cell 61.

[0096] The aforementioned insulating sheet VI11 is disposed between each of the battery cell assemblies 6 and is strip-shaped. The insulating sheet VI11 is located at the corners of each battery cell assembly 6. Since the battery cell 61 is a square battery cell, its corners are relatively sharp. Placing the insulating sheet VI11 at the corners of the battery cell assembly 6 can provide a certain degree of protection for its corners, preventing collisions that could cause the battery cell assembly 6 to malfunction. Figure 5 As shown;

[0097] Optionally, the insulating sheet VI11 can be configured in various shapes, as long as it is located at the corner of the cell assembly 6.

[0098] The aforementioned insulating sheet I5 has several connecting holes 52, which are used for the connecting wires 18 installed inside the battery cell assembly 6 to pass through. Since the insulating sheet I5 is located at the handle end of the carrying strap 2, several connecting holes 52 are provided here to ensure the battery pack is placed stably by aligning the carrying strap 2 and the connecting wires 18 at the same end. Figure 3 As shown.

[0099] The aforementioned connecting hole 52 has a protective coil 3 on the inward-facing side of the insulating sheet I5. Since this connecting hole 52 is designed to facilitate the passage of the connecting wire 18, simply punching a hole would inevitably result in a sharp edge. Directly passing the connecting wire 18 through the connecting hole 52 would cause wear at the point of contact between the connecting wire 18 and the connecting hole 52 over long-term use. Figure 5 As shown;

[0100] Optionally, the connecting hole 52 can also be rounded at the edges to reduce friction.

[0101] The aforementioned buffer components include several buffer plates disposed between the battery cells 61, and several buffer plates disposed between the insulating component and the battery cells 61. This arrangement reduces vibration and collision between the internal components of the battery pack, thereby reducing battery pack noise and vibration, and extending battery pack lifespan. The buffer plates act as buffers and isolates between components within the battery pack, preventing friction and collisions, reducing battery pack damage and failure rates, and improving battery pack safety and reliability. Furthermore, the buffer plates also provide heat insulation and fire protection, protecting the battery cells and circuit boards inside the battery pack and preventing overheating and fire.

[0102] The aforementioned buffer components refer to buffer sheet I12, buffer sheet II13, buffer sheet III14, and buffer sheet IV15, respectively.

[0103] Furthermore, the buffer sheet I12 is strip-shaped and parallel to the handle strap 2. The buffer sheet I12 is located between each of the battery cells 61. This arrangement is to reserve some space for the expansion of the battery cells 61.

[0104] Furthermore, the buffer sheet II13 is located between the insulating sheet III8 and the cell assembly 6, and plays a supporting role in the internal structure of the entire battery pack;

[0105] Furthermore, the buffer sheet III14 is located on the upper end face of the cell assembly 6 and is disposed between the insulating sheet III8 and the insulating sheet IV9, which plays a supporting role for the internal structure of the entire battery pack.

[0106] Furthermore, the buffer sheet IV15 is located between the insulating sheet V10 and the battery cell assembly 6, as shown below. Figure 5 As shown.

[0107] The aforementioned buffer sheet IV15 has slots 151 on both sides for the handle strap 2 of the outer side of the battery cell assembly 6 to pass through. There are two sets of slots 151, with at least two in each set. Since the buffer sheet IV15 is located between the insulating sheet V10 and the battery cell assembly 6, and the insulating sheet V10 has a second through hole 103 for the handle strap 2 to pass through, the slots 151 are provided to correspond to the second through hole 103, ensuring that the portion of the handle strap 2 located on the side of the battery cell assembly 6 can be tightly pressed against the side of the battery cell assembly 6 during connection, thus ensuring the flatness of the battery pack. Figure 3-4 As shown.

[0108] The positions of the first through holes 51 and the second through holes 103 respectively on the insulating sheets I5 and V10 in the aforementioned insulating components correspond one-to-one with the positions of the slots 151 on the buffer sheet IV15 in the buffer components. This arrangement is to ensure that the handle strap 2 can be tightly pressed against the side of the battery cell assembly 6 when connected, thus ensuring the flatness of the battery pack. Figure 3-4 As shown.

[0109] This invention relates to a power battery pack. By setting the outer shell 1 of the battery pack to a double-layer structure (i.e., an outer shell 101 and an inner shell 102), if the battery pack is damaged or scratched by a collision or shaking during drone operation, only the outermost outer shell 101 needs to be replaced, without affecting the overall sealing performance of the battery pack. This results in good economic efficiency and reduced maintenance costs. Furthermore, the outer shell 1 is made of PVC material, which has low density and thin walls, enabling lightweight design. Insulation and buffer components are also provided between the outer shell 1 and the internal battery cell assembly 6, ensuring the safety of the battery pack. The battery pack also features a through-type carrying handle 2 for convenient carrying and handling by the user.

[0110] Example 3

[0111] like Figure 1 The method for installing a power battery pack shown includes the power battery pack described in Example 1, and the installation method is as follows:

[0112] S1. Two cells 61 with larger surface areas are spliced ​​together to form a cell pack 6. Since this battery pack is suitable for large devices, such as large drones, and since a single cell 61 is 6.4mm thick, 171mm wide, and 205mm high, it is considered extra-large among aluminum-plastic film soft-pack cells 61, this stacking scheme is adopted because the packaging process of a single cell is not suitable for making the volume too large. Therefore, two cells 61 are used to form a cell pack 6, which saves space.

[0113] S2. Buffer and insulation components are installed inside the battery pack to improve the safety of the battery pack;

[0114] S3. Then insert the handle strap 2, which enters from one end of the battery pack where the connecting wire 18 is located, exits from the opposite end, and folds back from the other side, thus achieving a through connection of the handle strap 2;

[0115] S4. After the handle strap 2 is installed, the battery cell assembly 6 is added to the outward side of the handle strap 2 so that the handle strap 2 can be fixed.

[0116] S5. After completion, the assembled battery cell assembly is brought into contact with the inner surface of the inner layer 102 of the outer shell, and then the inner layer 102 of the outer shell is brought into contact with the inner surface of the outer layer 101 of the outer shell.

[0117] The positions of the insulating and buffer components in step S2 above are as follows: a buffer sheet I12 is provided between each adjacent cell group 6, and an insulating sheet I5 and an insulating sheet V10 are provided at both ends of the cell group 6 respectively. Furthermore, a buffer sheet IV15 is provided between the insulating sheet V10 and the cell group 6. The purpose of providing insulating sheets in the battery pack is to prevent short circuits between battery cells or circuit boards inside the battery pack, thereby improving the safety and reliability of the battery pack. The insulating sheets are usually made of insulating materials, which can isolate the battery cells and circuit boards to prevent short circuits or arcing between them.

[0118] In step S4 above, an insulating sheet VI11 is provided between the battery cell assembly 6 and the handle strap 2, and an insulating sheet II7 is provided at the outermost end of the battery cell assembly 6 facing outward. An insulating sheet IV9, a buffer sheet III14, and an insulating sheet III8 are respectively provided on the upper surface of the battery cell assembly 6, and a buffer sheet II13 and an insulating sheet III8 are respectively provided on the lower surface of the battery cell assembly 6. This arrangement not only protects the battery pack from breakage, but also provides support for the subsequent connection of the handle strap 2, preventing the handle strap 2 from contacting the battery cell assembly 6.

[0119] In step S3 above, one end of the handle strap 2 first passes through one of the first through holes 51 on the insulating sheet I5, and then passes through the first through hole 51 through the corresponding slot 151 on the buffer sheet IV15 until one end of the handle strap 2 passes through the second through hole 103 on the insulating sheet V10 corresponding to the position of the first through hole 51.

[0120] Furthermore, one end of the handle strap 2 is inserted into one of the second through holes 103 in another set and passes through the corresponding slot 151 and the first through hole 51 in sequence;

[0121] Furthermore, the handle strap 2 starts from the first through hole 51, passes through the first through hole 51 in the same group, and then passes through the corresponding slot 151 and the second through hole 103 in sequence;

[0122] Furthermore, the handle strap 2 starts from the second through hole 103 and passes through one of the other set of second through holes 103, then passes through the corresponding slot 151 and the first through hole 51 in sequence, and finally connects to the connecting ring 4 to complete the connection of the handle strap 2.

[0123] This invention relates to a method for installing a power battery pack. First, two individual battery cells 61 are joined together to form a cell assembly 6. Since this battery pack is suitable for large devices, such as large drones, and considering that a single battery cell is 6.4mm thick, 171mm wide, and 205mm high, it is considered extra-large among aluminum-plastic film soft-pack single-cell batteries, this stacking method is adopted because the packaging process for a single battery cell is not suitable for making it too large. Therefore, two individual battery cells are grouped together to form a cell assembly 6, saving space. Subsequently, several assembled cell assemblies 6 are joined together to form a battery module and insulating components are installed. The battery pack includes a buffer component, which ensures insulation and provides space for the expansion of the battery cell 61, while also ensuring the flatness of the assembled battery pack. The handle strap 2 is installed simultaneously with the battery cell assembly 6, the buffer component, and the insulation component. Finally, the outer battery cell assembly 6 is installed. After the internal structure of the battery pack is installed, it is installed inside the inner layer 102 of the outer shell, which encloses the internal structure of the battery pack. Then, the outer layer 101 is installed on the outside of the inner layer 102 to protect the battery pack. When the battery pack outer shell 1 is damaged, only the outer layer 101 needs to be replaced, saving costs.

[0124] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A power battery pack, characterized in that, The application relates to a power battery shell, which comprises an outer shell (1) including an outer shell outer layer (101) and an outer shell inner layer (102) which are mutually fitted and sleeved, the outer shell inner layer (102) has a cavity accommodating a battery cell group (6), the cavity inner wall is provided with an insulation part, the surface of the insulation part is further provided with a buffer part, the outer shell outer layer (101) and the outer shell inner layer (102) are plastic insulation material structural members, the outer shell outer layer (101) is identical in shape with the outer shell inner layer (102), and the inner surface of the outer shell outer layer (101) is fitted with the outer surface of the outer shell inner layer (102); the outer shell (1) is internally provided with the battery cell group (6) which is composed of a plurality of battery cells (61), the battery cell group (6) is externally provided with a handle belt (2) wrapping the battery cell group (6), the handle belt (2) penetrates through the insulation sheets arranged at both ends of the outer shell (1), the insulation part comprises insulation sheets I (5), insulation sheets II (7), insulation sheets III (8) and insulation sheets IV (9), wherein: The insulation sheet I (5) is located on one side of the handle belt (2) of the battery cell group (6), the first through hole (51) is arranged on the insulation sheet I (5) and is used for the handle belt (2) to penetrate through, and the first through hole (51) is provided with two groups, each group has at least two first through holes (51); The insulation sheet II (7) is arranged on two sides of the battery cell group (6), and no buffer part is arranged between the insulation sheet II (7) and the battery cell group (6); The insulation sheet III (8) is located on the upper and lower surfaces of the battery cell group (6); The insulation sheet IV (9) is located on one side of the battery cell group (6) provided with a connecting wire; The insulation sheet V (10) is located on the opposite end surface of the insulation sheet I (5), the second through hole (103) is arranged on the insulation sheet V (10) and is used for the handle belt (2) to penetrate through, and the second through hole (103) is provided with two groups, each group has at least two second through holes (103); The insulation sheet VI (11) is arranged between each battery cell group (6) and is in a strip shape, the insulation sheet VI (11) is located at the corner of each battery cell group (6), a plurality of connecting holes (52) are arranged on the insulation sheet I (5) and are used for the connecting wire (18) arranged in the battery cell group (6) to penetrate through, and the buffer part comprises buffer sheets I (12), buffer sheets II (13), buffer sheets III (14) and buffer sheets IV (15); The buffer sheet I (12) is in a strip shape and is parallel to the handle belt (2), and the buffer sheet I (12) is located between each battery cell (61); ​ Buffer sheet III (14): the buffer sheet III (14) is located on the upper end face of the battery cell group (6), and is arranged between the insulating sheet III (8) and the insulating sheet IV (9); Buffer sheet IV (15): the buffer sheet IV (15) is located between the insulating sheet V (10) and the battery cell group (6), and the buffer sheet IV (15) is provided with a clamping groove (151) on both sides for the handle strap (2) outside the battery cell group (6) to pass through, the clamping groove (151) is provided with two groups, each group has at least two, the positions of the first through hole (51) and the second through hole (103) respectively arranged on the insulating sheet I (5) and the insulating sheet V (10) correspond to the positions of the clamping grooves (151) arranged on the buffer sheet IV (15) in the buffer component.

2. The power battery pack of claim 1, wherein, One end of the battery cell group (6) is provided with a connecting line (18), and the connecting line (18) is arranged in the same direction as the handle strap (2).

3. The power battery pack of claim 1, wherein, The handle strap (2) is provided with a connecting ring (4), and the connecting ring (4) is arranged in a deviated position.

4. The power battery pack of claim 3, wherein, The handle strap (2) is arranged between the adjacent two battery cell groups (6) inside the battery pack.

5. The power battery pack of claim 4, wherein, The upper end of the battery cell group (6) is provided with a mica plate (16), and the mica plate (16) is provided with a plurality of copper bars (17).

6. The power cell housing of claim 1, wherein, The connecting hole (52) is provided with a wire protection ring (3) on the side of the insulating sheet I (5) facing inwards.

7. A power battery pack installation method, comprising a power battery pack according to any one of claims 1-6, and the installation method is as follows: S1. A plurality of battery cells (61) are spliced to form a battery cell group (6); S2. The buffer component and the insulating component are arranged in the battery pack; S3. Then the handle strap (2) is inserted; S4. After the handle strap (2) is arranged, the battery cell group (6) is arranged on the outer side of the handle strap (2); S5. After the completion, the inner surface of the inner layer (102) of the shell is abutted with the battery cell assembly, and the inner surface of the outer layer (101) of the shell is abutted with the inner layer (102).

8. The method of claim 7, wherein, In the step S2, the positions of the insulating component and the buffer component are as follows: the buffer sheet I (12) is arranged between each adjacent battery cell group (6), and the insulating sheet I (5) and the insulating sheet V (10) are arranged at both ends of the battery cell group (6), and further, the buffer sheet IV (15) is arranged between the insulating sheet V (10) and the battery cell group (6).

9. The method of claim 7, wherein, In the step S4, the insulating sheet VI (11) is arranged between the battery cell group (6) and the handle strap (2), the insulating sheet II (7) is arranged at the outer end of the outermost battery cell group (6), the insulating sheet IV (9), the buffer sheet III (14) and the insulating sheet III (8) are arranged in sequence on the upper end face of the battery cell group (6), and the buffer sheet II (13) and the insulating sheet III (8) are arranged in sequence on the lower end face of the battery cell group (6).

10. The method of claim 7, wherein, In the step S3, the handle strap (2) is inserted, which includes the following steps: Step S31: one end of the handle strap (2) is first threaded through one of the first through holes (51) in one group of the through holes on the insulation sheet I (5), and then threaded through the corresponding clamping slot (151) on the buffer sheet IV (15) via the first through hole (51) until the end of the handle strap (2) is threaded through the second through hole (103) on the insulation sheet V (10) corresponding to the position of the first through hole (51); Step S32: the end of the handle strap (2) is again threaded from one of the second through holes (103) in the other group of the through holes and sequentially threaded through the clamping slot (151) and the first through hole (51) corresponding to the position thereof; Step S33: the handle strap (2) is threaded from the first through hole (51) and sequentially threaded through the first through hole (51) in the same group and the clamping slot (151) and the second through hole (103) corresponding to the position thereof; Step S34: the handle strap (2) is threaded from the second through hole (103) and sequentially threaded through the clamping slot (151) and the first through hole (51) corresponding to the position thereof, and finally connected to the connecting ring (4), thereby completing the connection of the handle strap (2).

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