Long-life space battery

Abstract

The utility model discloses a long -life space battery pack relates to long -life satellite battery technical field, including structural frame and battery module, structural frame includes a plurality of frame board and a plurality of pull rod, a plurality of frame board assembly forms the open matrix frame of three adjacent sides, and the open face of two opposite opposite forms the block by at least one pull rod, and the remaining third open face evenly fixed with a plurality of pull rod to evenly separate frame space, battery module includes a plurality of single battery groups that are formed by a plurality of single batteries, and each single battery group is fixed in the single frame space that is evenly separated by the pull rod, and the electrode end face of one of each single battery group is close to the plane area of negative pole and is evenly installed with the equalizing module. The utility model is suitable for long -life satellite battery pack on -orbit use, has small, compact structure, firm, high mechanical strength, is favorable to equalizing battery pack voltage to prevent battery overcharge damage battery and causes dangerous effect.

Description

Technical Field

[0001] This utility model relates to the field of long-life satellite battery technology, and more specifically, it relates to a long-life space battery pack. Background Technology

[0002] In the field of satellite batteries, existing technologies for assembling battery packs using small-capacity cylindrical cells have the following technical drawbacks: First, structural complexity and weight issues: Traditional solutions require up to six structural plates to assemble the battery casing, then insert the individual cell modules, and integrate thermal management equipment and mechanical assemblies to form the battery pack, resulting in a significant increase in the overall weight of the battery pack and affecting the satellite's payload capacity. Second, applicability limitations: Due to limitations in battery cycle life and system reliability, such battery packs are mostly equipped on short-life satellites and cannot meet the continuous and stable energy supply requirements of long-life satellites. Third, the risk of voltage balancing deficiency: Due to the lack of dedicated individual cell voltage balancing chip modules, the battery pack is prone to overcharging or undercharging during charging and discharging due to differences in individual cell characteristics, leading to battery performance degradation or even the risk of thermal runaway.

[0003] The aforementioned problems highlight the contradiction between existing technologies and the need for balanced management of lightweight design, long lifespan, and safety, which urgently requires improvement. Utility Model Content

[0004] To address this problem in practical applications, the present invention aims to propose a long-life space battery pack that is small in size, compact in structure, and has high mechanical strength, which facilitates voltage equalization of the battery pack. It is suitable for on-orbit use of long-life satellite battery packs. The specific solution is as follows:

[0005] A long-life space battery pack includes a structural frame and a battery module;

[0006] The structural frame includes several frame plates and several tie rods. The frame plates are assembled to form a rectangular frame with three adjacent open sides. Two opposite open sides are blocked by at least one tie rod. Several tie rods are evenly fixed on the third open side other than the two opposite open sides to evenly divide the frame space.

[0007] The battery module includes several rows of individual battery packs composed of several individual battery cells, and each row of individual battery packs is fixed in a single frame space that is evenly separated by the pull rod.

[0008] An equalization module is installed on the flat area of ​​the electrode face of each cell in one of the columns of the single battery packs, near the negative electrode.

[0009] Furthermore, the frame plate includes a front end plate, a rear end plate, and a bottom plate. The front end plate and the rear end plate are respectively fixed to two opposite edges on the same end face of the bottom plate and arranged perpendicularly to the bottom plate. A plurality of the tie rods are fixedly connected between the front end plate and the rear end plate.

[0010] Furthermore, the front end plate and the rear end plate each have two first mounting feet, and the bottom plate is provided with two second mounting feet. The first mounting feet and the second mounting feet are used for docking and mounting the battery pack with the mounting plate inside the spacecraft.

[0011] Furthermore, the second mounting foot has an arc-shaped hole. One end of one of the pull rods located on the open surfaces of the two opposite sides is fixed to the first mounting foot of the front end plate, and the other end passes through the arc-shaped hole and is fixed to the first mounting foot of the rear end plate.

[0012] Furthermore, the front-end board also has mounting holes through which a grounding resistor and several electrical connectors are mounted.

[0013] Furthermore, the individual cells in each column of the battery pack are connected in series, and the individual cell packs in each column are connected in parallel.

[0014] Furthermore, adjacent individual cells in each column of the battery pack are separated by an insulating thermally conductive pad.

[0015] Furthermore, the gaps between each row of individual battery cells are filled with thermally conductive structural adhesive.

[0016] Furthermore, the equalization module is bonded to the planar area near the negative electrode on the end face of the battery motor using insulating tape and adhesive.

[0017] Furthermore, the bottom and sides of each individual battery cell are covered with insulating tape.

[0018] Furthermore, the electrical connector wires are welded to the battery tabs, and the weld joints are covered with silicone rubber.

[0019] The equalization module wires are welded to the battery tabs of each column.

[0020] Furthermore, all solder joints of the battery are covered with silicone rubber;

[0021] The battery wires are fixed by applying adhesive at the points where they pass through the battery tabs.

[0022] Furthermore, the frame plate is made of aluminum alloy.

[0023] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0024] This utility model battery pack uses three frame plates and ten tie rods to assemble the battery pack frame structure. The assembled battery pack is small in size, compact and sturdy in structure, and has high mechanical strength. The installed equalization module helps to balance the battery pack voltage, prevent the battery from being overcharged and damaged, and avoid danger. It is suitable for long-life satellite battery packs to be used in orbit. Attached Figure Description

[0025] Figure 1 This is an overall schematic diagram of an embodiment of the present utility model;

[0026] Figure 2 This is a schematic diagram of the frame structure in an embodiment of the present utility model;

[0027] Figure 3 This is a schematic diagram of the front end plate in an embodiment of the present invention;

[0028] Figure 4 This is a schematic diagram of the structure of the rear end plate in an embodiment of this utility model;

[0029] Figure 5 This is a schematic diagram of the structure of the base plate in an embodiment of this utility model;

[0030] Figure 6 This is a schematic diagram of the pull rod structure in an embodiment of this utility model.

[0031] Reference numerals: 1. Structural frame; 11. Front end plate; 12. Rear end plate; 13. Base plate; 14. Tie rod; 15. Electrical connector; 16. First mounting foot; 17. Second mounting foot; 18. Boss; 19. Mounting hole; 110. Arc hole;

[0032] 2. Battery module; 21. Individual battery pack; 22. Balancing module. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0034] This embodiment uses an elliptical lithium-ion battery with a capacity of not less than 5Ah and a voltage of not more than 4.2V as the basic unit, and forms a battery pack with a capacity of not less than 20Ah and a voltage of not more than 46.2V by connecting 4 in parallel and 11 in series (parallel first and then series). This provides a detailed description of the application.

[0035] like Figure 1 As shown, a long-life space battery pack includes a structural frame 1 and a battery module 2, wherein the battery module 2 is installed inside the structural frame 1. Specifically:

[0036] Combination Figure 2 The structural frame 1 includes three frame plates and ten tie rods 14. The three frame plates are a front plate 11, a rear plate 12, and a bottom plate 13. The front plate 11 and the rear plate 12 are arranged parallel to each other and are fixed to opposite edges on the same end face of the bottom plate 13, perpendicular to the bottom plate 13. The front plate 11, the rear plate 12, and the bottom plate 13 are assembled to form a rectangular frame with three open sides. The ten tie rods 14 are fixedly connected between the front plate 11 and the rear plate 12. Two tie rods 14 form a barrier on each of the two opposite open sides. Eight tie rods 14 are evenly fixed on the third open side (excluding the two opposite open sides) to evenly divide the frame space into four parts. Each tie rod 14 is fixed laterally along the front plate 11 and the rear plate 12. Preferably, the front plate 11, the rear plate 12, the bottom plate 13, and the tie rods 14 on the frame plates are all made of aluminum alloy.

[0037] The battery module 2 includes four rows of single-cell battery packs 21, each row of single-cell battery packs 21 includes eleven single cells, wherein the eleven single cells in each row of single-cell battery packs 21 are connected in series, and the four rows of single-cell battery packs 21 are connected in parallel.

[0038] The four rows of individual battery cells 21 are fixed in four frame spaces that are evenly divided by the tie rods 14.

[0039] Each cell in one row of individual battery packs 21 has an equalization module 22 installed on the flat area of ​​its electrode face near the negative electrode, for a total of eleven equalization modules 22.

[0040] This embodiment uses three frame plates and ten tie rods 14 to assemble the battery pack frame structure. The assembled battery pack is small in size, compact, robust, and has high mechanical strength. The installed equalization module 22 helps to balance the battery pack voltage and prevent overcharging from damaging the battery and causing danger. This type of battery pack is suitable for in-orbit use of long-life satellite battery packs.

[0041] The front end plate 11 and the rear end plate 12 serve as the front and rear partitions of the frame structure, while the bottom plate 13 serves as the bottom support plate. The bottom plate 13 has two functions: first, to support all individual cells, and second, to provide a mounting surface.

[0042] More specifically, Figure 2 Combination Figure 3-5 , Figure 3 , Figure 4 , Figure 5The diagram shows the structure of the front plate 11, rear plate 12, and bottom plate 13. The front plate 11 and rear plate 12 each have four Φ4 through holes and six Φ3 through holes (not shown in the diagram). Four tie rods 14 on two opposite open surfaces pass through the Φ4 through holes and are fixed with nuts. Six tie rods 14 on a third open surface (excluding the two opposite open surfaces) pass through the Φ3 through holes and are also fixed with nuts. Their function is to clamp each row of individual battery cells 21. Preferably, see... Figure 6 The four tie rods 14 located on the two opposite open surfaces are M4 tie rods, and the six tie rods 14 on the third open surface (excluding the two opposite open surfaces) are M3 tie rods. Figure 6 The left side is the M3 tie rod, and the right side is the M4 tie rod.

[0043] Meanwhile, the bottom surfaces of the front end plate 11 and the rear end plate 12 each have four Φ3 through holes, and the bottom plate 13 has eight Φ3 through holes. The through holes on the front end plate 11 and the rear end plate 12 are correspondingly arranged with the through holes on the bottom plate 13, and are installed by mating with pan head screws (not shown in the figure). Additionally, the bottom surfaces of the front end plate 11 and the rear end plate 12 each have two M3 threaded holes, and the bottom plate 13 has four M3 countersunk holes. The threaded holes and countersunk holes are correspondingly arranged and are installed by mating with countersunk screws (not shown in the figure). The purpose is to secure the front end plate 11, the rear end plate 12, and the bottom plate 13.

[0044] Figure 2 Combination Figure 3 One end of the front panel 11 extends upward to form a rectangular boss 18. A mounting hole 19 is provided on the side of the boss 18. A grounding resistor and two electrical connectors 15 are installed on the front panel 11 through the mounting hole 19. During installation, the wires of the electrical connectors 15 are soldered to the battery tabs, and the solder joint is covered with GD414 silicone rubber.

[0045] See Figure 2-5 The front end plate 11 and the rear end plate 12 each have two first mounting feet 16, and the bottom plate 13 has two second mounting feet 17. The first mounting feet 16 and the second mounting feet 17 form two sets of symmetrical mounting feet located at both ends of the frame plate, for a total of six mounting feet. The first mounting feet 16 and the second mounting feet 17 are used for docking and mounting the battery pack and the mounting plate inside the spacecraft.

[0046] Furthermore, the second mounting foot 17 has an arc hole 110. One end of one of the pull rods 14 located on the open surface of the two opposite sides is fixed to the first mounting foot 16 of the front end plate 11, and the other end passes through the arc hole 110 and is fixed to the first mounting foot 16 of the rear end plate 12. In this way, the strength of the second mounting foot 17 on the base plate 13 can be increased by the combination of the mounting foot and the pull rod 14.

[0047] The entire frame structure in this embodiment uses only three frame plates, ten tie rods 14, and a number of fasteners such as screws and nuts. It uses less material, has a small volume, and has a simple and compact structure, which can effectively reduce the weight of the frame.

[0048] Back Figure 1 The structural frame 1 contains only four rows of individual battery packs 21, totaling forty-four individual batteries.

[0049] In each row of individual battery cells 21, adjacent individual cells are separated by an insulating thermally conductive pad (not shown in the figure). This serves two purposes: firstly, to enhance the insulation between adjacent individual cells, and secondly, to improve the thermal conductivity and heat transfer between adjacent individual cells.

[0050] Furthermore, since the individual cells are elliptical, the gaps between each row of individual cells 21 are filled with thermally conductive structural adhesive (not shown in the figure). This adhesive serves to bond the four rows of cells together as a whole, which not only enhances the battery pack's resistance to mechanical vibration during flight but also ensures heat transfer and dissipation between the cells.

[0051] During installation, the bottom and sides of each individual battery cell are covered with insulating tape (not shown in the figure).

[0052] See also Figure 1 The entire battery pack comprises eleven equalization modules 22. Each equalization module 22 is bonded to the flat area near the negative terminal on the battery motor end face using insulating tape and adhesive. Furthermore, the wires of the equalization module 22 are soldered to the battery tabs of each row. The function of the equalization module 22 is to equalize the voltage of each row of individual battery cells 21, preventing overcharging of the battery pack and potential damage to the batteries.

[0053] The specific installation steps of this utility model are as follows:

[0054] Step 1) Install the balancing module: Install the balancing module 22 on the flat area near the negative electrode of each cell in one row of individual battery packs 21, including:

[0055] ① Lay a layer of polyimide insulating tape on the flat area of ​​the battery terminal face near the negative electrode;

[0056] ② Apply a layer of silicone rubber adhesive to the surface of the insulating tape and the bottom surface of the equalization module respectively;

[0057] ③ Attach the equalization module 22 to the battery terminal side;

[0058] ④ Curing under natural conditions for 48 hours;

[0059] ⑤ Clean up any residual silicone rubber extruded around the equalization module 22;

[0060] ⑥ Apply silicone rubber to the periphery of the equalization module 22;

[0061] Step 2) Install battery module 2, including:

[0062] ① Cover the sides and bottom of each individual battery cell with polyimide insulating tape.

[0063] Ensure the insulation of the battery's outer surface;

[0064] ② Secure the front end plate 11, the rear end plate 12, and the bottom plate 13 with a screw assembly;

[0065] ③ Insert 6 M3 screws and 4 M4 screws into the corresponding spaces of the front end plate 11, the rear end plate 12 and the bottom plate 13 to divide the battery frame structure 1 into 4 areas;

[0066] ④ Install a row of individual battery packs 21 in each area according to a certain series-parallel relationship, wherein adjacent individual batteries are separated by a thermally conductive insulating pad of a certain thickness, and the front end plate 11 and the rear end plate 12 are required to press each row of individual battery packs 21 tightly.

[0067] ⑤ Secure the M3 and M4 screws inserted into the front plate 11, rear plate 12, and base plate 13 with M3 and M4 nuts;

[0068] Step 3) Filling with insulating and thermally conductive adhesive: The gaps between each row of individual battery packs 21 are filled with insulating and thermally conductive adhesive. The purpose of filling with insulating and thermally conductive adhesive is twofold: first, to ensure the thermal conductivity between each row of individual battery packs 21; and second, to fix each row of individual battery packs 21 together, achieving a fixing and buffering effect for the battery pack under mechanical conditions.

[0069] Step 4) Install electrical connectors 15: Install two electrical connectors 15 at the front end plate 11 of the assembled battery pack structure for power supply and electrical signal input and output;

[0070] Step 5) Welding, including:

[0071] ① Solder the wire of the electrical connector 15 to the battery tab with tin solder, and cover all solder joints with GD414 silicone rubber;

[0072] ② Solder the wires of the equalization module 22 to each battery tab of one of the rows of individual battery packs 21;

[0073] Step 6) Dispensing adhesive, including:

[0074] ① All solder joints of the battery are covered with GD414 silicone rubber;

[0075] ② Apply adhesive to fix the battery wires at the positions where they pass through the battery tabs.

[0076] It should also be noted that the above description is only a preferred embodiment of this utility model, and the protection scope of this utility model is not limited to the above embodiments. All technical solutions within the scope of this utility model's concept are within the protection scope of this utility model. For example, the shape of the frame plate can be changed according to actual needs and is not limited to the shape shown in this application. Similarly, the number of individual battery packs and the corresponding number of tie rods can be increased or decreased according to actual needs and are not limited to the numbers listed in this application.

[0077] It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of this utility model should also be considered within the scope of protection of this utility model.

Claims

1. A long-life space battery pack, comprising a structural frame and a battery module, characterized in that: The structural frame includes several frame plates and several tie rods. The frame plates are assembled to form a rectangular frame with three adjacent open sides. Two opposite open sides are blocked by at least one tie rod. Several tie rods are evenly fixed on the third open side other than the two opposite open sides to evenly divide the frame space. The battery module includes several rows of individual battery packs composed of several individual battery cells, and each row of individual battery packs is fixed in a single frame space that is evenly separated by the pull rod. An equalization module is installed on the flat area of ​​the electrode face of each cell in one of the columns of the single battery packs, near the negative electrode.

2. The long-life space battery pack of claim 1, wherein The frame plate includes a front end plate, a rear end plate, and a bottom plate. The front end plate and the rear end plate are respectively fixed to two opposite edges on the same end face of the bottom plate and are arranged perpendicular to the bottom plate. A number of tie rods are fixedly connected between the front end plate and the rear end plate.

3. The long-life space battery of claim 2, wherein The front end plate and the rear end plate each have two first mounting feet, and the bottom plate has two second mounting feet. The first mounting feet and the second mounting feet are used for docking and installing the battery pack and the mounting plate inside the spacecraft. Furthermore, the second mounting foot has an arc-shaped hole. One end of one of the pull rods located on the open surfaces of the two opposite sides is fixed to the first mounting foot of the front end plate, and the other end passes through the arc-shaped hole and is fixed to the first mounting foot of the rear end plate.

4. The long-life space battery pack of claim 2, wherein The front-end board also has mounting holes through which a grounding resistor and several electrical connectors are mounted.

5. The long-life space battery of claim 1, wherein The individual cells in each column of the battery pack are connected in series, and the individual cells in each column are connected in parallel.

6. The long-life space battery pack according to claim 1, characterized in that, In each column of the aforementioned individual battery pack, adjacent individual cells are separated by an insulating thermally conductive pad.

7. The long-life space battery pack according to claim 1, characterized in that, The gaps between each row of individual battery cells are filled with thermally conductive structural adhesive.

8. The long-life space battery pack according to claim 1, characterized in that, The equalization module is bonded to the planar area near the negative terminal on the end face of the battery motor using insulating tape and adhesive.

9. The long-life space battery pack according to claim 1, characterized in that, The bottom and sides of each individual battery cell are covered with insulating tape.

10. The long-life space battery pack according to claim 4, characterized in that, The electrical connector wires are soldered to the battery tabs, and the solder joints are covered with silicone rubber. The equalization module wires are welded to the battery tabs of each column.

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