A minimalist lithium battery pack and manufacturing method thereof

Abstract

The present invention relates to a minimalist lithium battery pack, wherein the gap between the battery cell and the battery pack shell is filled with a gap-filling component, a connecting plate is provided with a total positive output connector, a total negative output connector, a voltage signal output connector and a temperature signal output connector, an isolation adapter plate is provided above the connecting plate, a total positive intermediate connector, a voltage signal intermediate adapter, a temperature signal intermediate adapter and a total negative connector are provided on the isolation adapter plate, a protection plate is provided above the isolation adapter plate, a total positive input connector, a total negative input connector and a total output connector are provided on the protection plate, a temperature signal input connector docked with the temperature signal intermediate adapter is also provided on the protection plate, and a voltage signal input connector docked with the voltage signal intermediate adapter is also provided on the protection plate. The minimalist lithium battery pack of the present invention has a simple structure, reduces the cost of accessories, is modularly assembled, can realize automated manufacturing, reduces assembly costs, uses an isolation adapter plate to isolate the battery pack and the protection plate, and prevents the heating of the protection plate from affecting the battery pack.

Description

Technical Field

[0001] The present invention relates to the technical field of battery packs, and in particular to a minimalist lithium battery pack and a manufacturing method thereof. Background Art

[0002] The conventional structure of existing lithium battery packs is battery cell-module-battery pack. The module is mainly composed of single battery cells connected in series and parallel with a fixed bracket. The module and protection board are connected, and then a shell is added to form a battery pack. Before 2012, the power battery industry was in the introduction stage, with the following characteristics: (1) The production scale of enterprises was small, and most of the enterprises producing single power battery cells were transformed from traditional 3C small lithium battery enterprises; (2) The maturity of battery production technology was low, the process control ability was weak, and the consistency and stability of single battery cells were relatively poor. The module, as a buffer between the single battery cell and the battery pack, is conducive to ensuring the stability and safety of the battery pack.

[0003] There are the following defects:

[0004] (1) The module requires many parts, which increases weight, has low grouping efficiency, low system energy density, and complex grouping process. The number of parts in an ordinary minimalist lithium battery pack is generally 20 to 40.

[0005] (2) The module cost accounts for a high proportion. The increase in structural parts and components brought by the module, and the increase in cost is one of the main problems of the module. The battery cell cost accounts for about 80%, and the PACK cost accounts for about 20% of the entire battery pack. Summary of the invention

[0006] The object of the present invention is to provide a minimalist lithium battery pack and a method for manufacturing the same, so as to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A minimalist lithium battery pack comprises a battery shell, wherein a plurality of battery cells are arranged in the battery shell, a gap between the battery cells and the battery shell is filled with a gap-filling component, a connecting plate is connected between the battery cells, a total positive output connector, a total negative output connector, a voltage signal output connector and a temperature signal output connector are arranged on the connecting plate, an isolation adapter plate is arranged above the connecting plate, a total positive intermediate connector, a voltage signal intermediate adapter, a temperature signal intermediate adapter and a total negative connector are arranged on the isolation adapter plate, a protection plate is arranged above the isolation adapter plate, a total positive input connector, a total negative input connector and a total output connector are arranged on the protection plate, a temperature signal input connector connected to the temperature signal intermediate adapter connector is also arranged on the protection plate, a voltage signal input connector connected to the voltage signal intermediate adapter connector is also arranged on the protection plate, and a battery pack cover is arranged above the battery shell.

[0009] Preferably, the protection plate, the isolation adapter plate and the battery casing are connected together.

[0010] Preferably, the battery pack upper cover is provided with a connector, and the connector and the main output connector of the protection board are arranged correspondingly.

[0011] Preferably, the battery pack shell and the battery pack cover are made of plastic or metal.

[0012] Preferably, the battery cell is a lithium manganese oxide battery, a lithium iron phosphate battery, a ternary battery or a lithium-air battery.

[0013] Preferably, the battery cell is a soft pack or a square shell.

[0014] Preferably, the gap-filling component is foam, glue or a glass fiber partition.

[0015] The present invention also provides a method for manufacturing a minimalist lithium battery pack, which comprises the following steps when the battery pack shell and the battery pack cover are made of plastic:

[0016] The first step is to take 15 cells and stack them neatly into a battery pack, and wrap a layer of gap-filling components on the outside;

[0017] The second step is to place the battery pack into a battery case;

[0018] The third step is to place the connecting plate on top of the battery pack, and insert the tabs of each cell of the battery pack into each hole of the connecting plate;

[0019] Step 4: Use laser welding or soldering to connect the connecting plate and the tab;

[0020] Step 5: Press the isolation adapter plate onto the connection plate, and tighten the connectors one by one;

[0021] Step 6: Install the protection board on the isolation adapter board, and fasten the connectors one by one;

[0022] Step 7. Connect the connector of the battery pack cover plug to the connector of the protection board, and simply buckle it on the isolation adapter board and the battery pack shell;

[0023] Step 8: Conduct basic performance test of the battery pack, and proceed to the next step after the test passes;

[0024] The ninth step is to use a special heat-sealing machine to heat the contact parts of the battery shell, the isolation adapter plate and the battery cover, so that the plastics of the battery shell and the battery cover are fused together, and the isolation adapter plate, the battery shell and the battery cover are bonded together.

[0025] Preferably, when the battery shell and the battery cover are made of aluminum alloy, the following manufacturing process is adopted: the contact parts of the battery shell and the battery cover are connected together by laser welding, and the isolation adapter plate is pressed to ensure the sealing.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] (1) The battery pack has a simple structure, and the number of accessories is reduced from 20 to 40 to 7 main accessories, reducing the cost of accessories.

[0028] (2) Modular assembly, simple process, can realize automated manufacturing and reduce assembly costs;

[0029] (3) Use an isolation adapter board to isolate the battery pack and the protection board to prevent the heat generated by the protection board from affecting the battery pack and causing thermal runaway of the battery pack, and also to prevent electrical fires from causing thermal runaway of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of the structure of the extremely simple lithium battery pack of the present invention;

[0031] Figure 2 This is a schematic diagram of an explosion of the minimalist lithium battery pack of the present invention;

[0032] Figure 3 This is a schematic diagram of the structure of the protection board in the minimalist lithium battery pack of the present invention;

[0033] Figure 4 It is a schematic diagram of the structure of the battery cover in the minimalist lithium battery pack of the present invention;

[0034] Figure 5 It is a structural schematic diagram of the connecting plate in the minimalist lithium battery pack of the present invention;

[0035] Figure 6 It is a structural schematic diagram of the isolation adapter board in the minimalist lithium battery pack of the present invention.

[0036] In the figure: 100, shell; 200, battery cell; 300, gap-filling component; 400, connecting plate; 500, isolation adapter plate; 600, protection plate; 7, battery pack cover; 401, total positive output connector; 402, voltage signal output connector; 403, temperature signal output connector; 404, total negative output connector; 501, total positive middle connector; 502, voltage signal middle adapter; 503, temperature signal middle adapter; 504, total negative connector; 601, total positive input connector; 602, voltage signal input connector; 603, temperature signal input connector; 604, total negative input connector; 605, total output connector; 701, connector. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] See also Figures 1 to 6 In an embodiment of the present invention, a minimalist lithium battery pack includes a battery pack shell 100, wherein a plurality of battery cells 200 are arranged in the battery pack shell 100, and a gap-filling component 300 is filled in the gap between the battery cells 200 and the battery pack shell 100, and a connecting plate 400 is connected between the battery cells 200, and a total positive output connector 401, a total negative output connector 404, a voltage signal output connector 402 and a temperature signal output connector 403 are arranged on the connecting plate 400, and an isolation adapter plate 500 is arranged above the connecting plate 400, and a total positive intermediate connector 501, a voltage signal intermediate adapter 502, a temperature signal intermediate adapter 503 and a total negative connector 504 are arranged on the isolation adapter plate 500, and a protection plate 600 is arranged above the isolation adapter plate 500, and a total positive inlet connector 601, a total negative inlet connector 604 and a temperature signal output connector 403 are arranged on the protection plate 600 A total output connector 605 is provided on the protection plate 600, and a temperature signal input connector 603 connected to the temperature signal intermediate adapter 503 is also provided on the protection plate 600. A voltage signal input connector 602 connected to the voltage signal intermediate adapter 502 is also provided on the protection plate 600. A battery pack cover 700 is provided above the battery pack shell 100. The protection plate 600, the isolation adapter plate 500 and the battery pack shell 100 are connected together. The battery pack cover 700 is provided with a connector 701, and the connector 701 and the total output connector 605 of the protection plate 600 are correspondingly arranged. The battery pack shell 100 and the battery pack cover 700 are made of plastic or metal. The battery cell 200 is a lithium manganese oxide battery, a lithium iron phosphate battery, a ternary battery or a lithium-air battery. The battery cell 200 is a soft pack or a square shell, and the filling component 300 is a foam, glue or glass fiber partition.

[0039] When the minimalist lithium battery pack of the present invention is in use, the battery pack structure is simple, the number of accessories is reduced from 20 to 40 to 7 main accessories, thereby reducing the cost of accessories, modular assembly, simple process, and capable of realizing automated manufacturing, thereby reducing assembly costs. An isolation adapter plate is used to isolate the battery pack and the protection board to prevent the heat of the protection board from affecting the battery pack and causing thermal runaway of the battery pack, and also to prevent electrical fires from causing thermal runaway of the battery.

[0040] The present invention also provides a method for manufacturing a minimalist lithium battery pack, which comprises the following steps when the battery pack shell and the battery pack cover are made of plastic:

[0041] The first step is to take 15 cells and stack them neatly into a battery pack, and wrap a layer of gap-filling components on the outside;

[0042] The second step is to place the battery pack into a battery case;

[0043] The third step is to place the connecting plate on top of the battery pack, and insert the tabs of each cell of the battery pack into each hole of the connecting plate;

[0044] Step 4: Use laser welding or soldering to connect the connecting plate and the tab;

[0045] Step 5: Press the isolation adapter plate onto the connection plate, and tighten the connectors one by one;

[0046] Step 6: Install the protection board on the isolation adapter board, and fasten the connectors one by one;

[0047] Step 7. Connect the connector of the battery pack cover plug to the connector of the protection board, and simply buckle it on the isolation adapter board and the battery pack shell;

[0048] Step 8: Conduct basic performance test of the battery pack, and proceed to the next step after the test passes;

[0049] The ninth step is to use a special heat-sealing machine to heat the contact parts of the battery shell, the isolation adapter plate and the battery cover, so that the plastics of the battery shell and the battery cover are fused together, and the isolation adapter plate, the battery shell and the battery cover are bonded together.

[0050] In this embodiment, when the battery shell and the battery cover are made of aluminum alloy, the following manufacturing process is adopted: the contact parts of the battery shell and the battery cover are connected together by laser welding, and the isolation adapter plate is pressed to ensure the sealing.

[0051] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0052] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A minimalist lithium battery pack, characterized in that: It includes a battery shell, wherein a plurality of battery cells are arranged in the battery shell, and the gap between the battery cells and the battery shell is filled with a filling component, a connecting plate is connected between the battery cells, and a total positive output connector, a total negative output connector, a voltage signal output connector and a temperature signal output connector are arranged on the connecting plate, an isolation adapter plate is arranged above the connecting plate, and a total positive intermediate connector, a voltage signal intermediate adapter, a temperature signal intermediate adapter and a total negative connector are arranged on the isolation adapter plate, a protection plate is arranged above the isolation adapter plate, and a total positive input connector, a total negative input connector and a total output connector are arranged on the protection plate, a temperature signal input connector connected to the temperature signal intermediate adapter is also arranged on the protection plate, and a voltage signal input connector connected to the voltage signal intermediate adapter is also arranged on the protection plate, and a battery pack cover is arranged above the battery shell, and the battery pack shell and the battery pack cover are made of plastic or metal.

2. A minimalist lithium battery pack according to claim 1, characterized in that: The protection plate, the isolation adapter plate and the battery pack shell are connected together.

3. A minimalist lithium battery pack according to claim 1, characterized in that: The battery pack upper cover is provided with a connector, and the connector and the main output connector of the protection board are arranged correspondingly.

4. A minimalist lithium battery pack according to claim 1, characterized in that: The battery cell is a lithium manganese oxide battery, a lithium iron phosphate battery, a ternary battery or a lithium-air battery.

5. The minimalist lithium battery pack according to claim 1, characterized in that: The battery core is a soft package or a square shell.

6. The minimalist lithium battery pack according to claim 1, characterized in that: The gap filling component is foam, glue or glass fiber partition.

7. A method for manufacturing a minimalist lithium battery pack according to any one of claims 1 to 6, characterized in that: When the battery pack shell and the battery pack cover are made of plastic, the method includes the following steps: The first step is to take 15 cells and stack them neatly into a battery pack, and wrap a layer of gap-filling components on the outside; The second step is to place the battery pack into a battery case; The third step is to place the connecting plate on top of the battery pack, and insert the tabs of each cell of the battery pack into each hole of the connecting plate; Step 4: Use laser welding or soldering to connect the connecting plate and the tab; Step 5: Press the isolation adapter plate onto the connection plate, and tighten the connectors one by one; Step 6: Install the protection board on the isolation adapter board, and fasten the connectors one by one; Step 7. Connect the connector of the battery pack cover plug to the connector of the protection board, and simply buckle it on the isolation adapter board and the battery pack shell; Step 8: Conduct basic performance test of the battery pack, and proceed to the next step after the test passes; The ninth step is to use a special heat-sealing machine to heat the contact parts of the battery shell, the isolation adapter plate and the battery cover, so that the plastics of the battery shell and the battery cover are fused together, and the isolation adapter plate, the battery shell and the battery cover are bonded together.

8. The method for manufacturing a minimalist lithium battery pack according to claim 7, characterized in that: When the battery shell and the battery cover are made of aluminum alloy, the following manufacturing process is adopted: the contact parts of the battery shell and the battery cover are connected together by laser welding, and the isolation adapter plate is pressed to ensure the sealing.

Images