Battery module, battery pack and battery detection system

Abstract

The utility model discloses a battery module, a battery pack and a battery detection system. The battery module comprises a plurality of battery cells, a plurality of double-insulation top cover modules and a conductive module, the double-insulation top cover module comprises an aluminum double-insulation top cover and an insulation module; the aluminum double-insulation top covers are arranged on one sides of the battery cell poles, the insulation modules are arranged on one sides, far away from the battery cell poles, of the aluminum double-insulation top covers, and the battery cells and the aluminum double-insulation top covers are arranged in a one-to-one correspondence mode; the first end of the conductive module is connected with the power supply cell group, and the second end of the conductive module penetrates through the insulation module and is connected with each aluminum double-insulation top cover, so that potential is provided for the aluminum double-insulation top cover through the power supply cell group, and the anti-corrosion capability of the aluminum double-insulation top cover is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially relates to a battery module, battery package and battery detection system. BACKGROUND

[0002] Most power batteries adopt aluminum shell + aluminum top cover packaging roll core, and have the characteristics of high reliability and are widely used in the market.

[0003] The top cover positive and negative pole is the leading part of the electrode, and the positive potential is generally 2-4.5V. During the charging and discharging process of the secondary battery, lithium ions change, and during the charging stage, lithium ions react with graphite in the negative electrode to generate lithium carbon compounds. When aluminum and graphite are both negative electrodes, and aluminum is in contact with the negative pole or the aluminum of the negative pole is in contact with the electrolyte inside the battery, lithium preferentially reacts with aluminum to generate aluminum lithium alloy, thereby corroding the aluminum shell. UTILITY MODEL CONTENT

[0004] The utility model provides a kind of battery module, battery package and battery detection system to improve the corrosion resistance of aluminum double-insulation top cover.

[0005] According to an aspect of the utility model, a battery module is provided, which includes:

[0006] A plurality of battery cells, a plurality of double-insulation top cover modules and a conductive module;

[0007] The double-insulation top cover module includes an aluminum double-insulation top cover and an insulating module.

[0008] The aluminum double-insulation top cover is arranged on one side of the battery cell pole, the insulating module is arranged on the side of the aluminum double-insulation top cover away from the battery cell pole, and the battery cell and the aluminum double-insulation top cover are one-to-one correspondingly arranged; the first end of the conductive module is connected with the power supply battery cell group, and the second end of the conductive module passes through the insulating module and is connected with each aluminum double-insulation top cover to provide potential for the aluminum double-insulation top cover through the power supply battery cell group; wherein the power supply battery cell group includes at least one battery cell.

[0009] Further, the conductive module includes an integrated busbar and a spring contact.

[0010] The first end of the integrated busbar is connected with one of the battery cells in the power supply battery cell group, and the remaining battery cells are sequentially connected in a loop; the integrated busbar is connected with the aluminum double-insulation top cover through the spring contact, and the spring contact and the aluminum double-insulation top cover are one-to-one correspondingly arranged.

[0011] Further, the integrated busbar is sequentially connected with the aluminum double-insulation top cover through the spring contact.

[0012] Further, the integrated busbar includes a first branch busbar and a second branch busbar.

[0013] The first end of the first branch busbar is connected with one of the power supply cell groups, and the first branch busbar is connected in series with the aluminum insulation top cover of the first branch through spring contacts;

[0014] The first end of the second branch busbar is connected with the first end of the first branch busbar, and the second branch busbar is connected in series with the aluminum insulation top cover of the second branch through spring contacts.

[0015] Further, the integrated busbar is welded and connected with the aluminum double insulation top cover through spring contacts.

[0016] Further, one end of the spring contact is welded on the integrated busbar, and the spring contact is clamped on one side of the insulation module close to the aluminum double insulation top cover, so that the spring contact is in contact with the aluminum double insulation top cover.

[0017] Further, the insulation module comprises an insulation film.

[0018] Further, the power supply cell group comprises two cells.

[0019] According to another aspect of the utility model, a battery pack is provided, the battery pack comprises the battery module of any of the above embodiments.

[0020] According to another aspect of the utility model, a battery detection system is provided, the battery detection system comprises a battery management module and the battery module of any of the above embodiments.

[0021] The battery management module is connected with the conductive module; the battery management module is used for detecting the voltage signal of the conductive module in real time, alarming when the voltage signal is abnormal, and providing the potential for the conductive module.

[0022] The battery module provided by the embodiment of the utility model comprises: a plurality of cells, a plurality of double insulation top cover modules and a conductive module, the double insulation top cover module comprises an aluminum double insulation top cover and an insulation module, the aluminum double insulation top cover is arranged on one side of the cell pole, the insulation module is arranged on the side of the aluminum double insulation top cover away from the cell pole, the cell and the aluminum double insulation top cover are arranged one by one, the first end of the conductive module is connected with the power supply cell group, the second end of the conductive module is connected with each aluminum double insulation top cover through the insulation module, so as to provide the potential for the aluminum double insulation top cover through the power supply cell group, when the battery module is damaged, the aluminum double insulation top cover is in contact with the negative pole of the cell or the aluminum double insulation top cover is in contact with the internal electrolyte of the cell, the lithium ion can be prevented from preferentially reacting with the aluminum double insulation top cover to generate aluminum lithium alloy, the corrosion resistance of the aluminum double insulation top cover is improved, and the reliability and safety of the battery module are effectively improved.

[0023] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present application, nor is it intended to limit the scope of the present application. Other features of the present application will become apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0025] Figure 1 is a structural schematic diagram of a battery module according to an embodiment of the present application;

[0026] Figure 2 is a structural schematic diagram of another battery module according to an embodiment of the present application;

[0027] Figure 3 is a structural schematic diagram of a battery detection system according to an embodiment of the present application. DETAILED DESCRIPTION

[0028] In order to make the person skilled in the art better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely in conjunction with the drawings of the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should be within the scope of protection of the present application.

[0029] It should be noted that the terms "first", "second" and the like in the specification and claims of the present application and the above drawings are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not necessarily limit to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0030] The embodiment of the present application provides a battery module, Figure 1is a structural diagram of a battery module according to an embodiment of the present application, Figure 2 is a structural diagram of another battery module according to an embodiment of the present application, for reference Figure 1 and Figure 2 The battery module comprises:

[0031] a plurality of battery cells 1, a plurality of double-insulation top cover modules 2 and a conductive module 3.

[0032] The double-insulation top cover module 2 comprises an aluminum double-insulation top cover 21 and an insulation module 22.

[0033] The aluminum double-insulation top cover 21 is arranged at one side of a battery cell pole 4, the insulation module 22 is arranged at a side of the aluminum double-insulation top cover 21 away from the battery cell pole 4, and the battery cell 1 is arranged in one-to-one correspondence with the aluminum double-insulation top cover 21; a first end of the conductive module 3 is connected with a power supply battery cell group, and a second end of the conductive module 3 is connected with each aluminum double-insulation top cover 21 through the insulation module 22, so as to provide potential for the aluminum double-insulation top cover 21 by the power supply battery cell group; wherein the power supply battery cell group comprises at least one battery cell 1.

[0034] Specifically, at least one battery cell 1 is selected from a plurality of battery cells 1 in the battery module to form a power supply battery cell group, so as to provide potential for the aluminum double-insulation top cover 21; for example, if the power supply battery cell group comprises only one battery cell 1, the first end of the conductive module 3 is connected with the positive pole of the battery cell 1 in the power supply battery cell group; if the power supply battery cell group comprises two or more battery cells 1, the first end of the conductive module 3 is connected with the positive pole of a certain battery cell 1 in the power supply battery cell group, and the remaining battery cells 1 in the power supply battery cell group are connected in sequence with the battery cell 1 connected with the conductive module 3. At the same time, the remaining battery cells 1 in the battery module are connected in sequence to supply power to an external load.

[0035] After setting the aluminum double-insulated top cover 21 on one side of the cell terminal 4 and setting the insulating module 22 on the side of the aluminum double-insulated top cover 21 away from the cell terminal 4, a through hole needs to be set on each insulating module 22. At this time, the first end of the conductive module 3 is connected to the power supply cell group. For example, the first end of the conductive module 3 can be welded to the positive terminal of a certain cell 1 in the power supply cell group. The second end of the conductive module 3 passes through the insulating module 22 and is connected to each aluminum double-insulated top cover 21. For example, the conductive module 3 is welded to the aluminum double-insulated top cover 21 to provide potential to the aluminum double-insulated top cover 21 through the power supply cell group. This prevents lithium ions from preferentially reacting with the aluminum double-insulated top cover 21 to form an aluminum-lithium alloy when the battery module is damaged and the aluminum double-insulated top cover 21 is in contact with the negative terminal of the cell 1 or the aluminum double-insulated top cover 21 is in contact with the electrolyte inside the cell 1, thereby improving the corrosion resistance of the aluminum double-insulated top cover 21. In this process, the aluminum casing of the battery cell and the aluminum double-insulated top cover 21 are welded together to encapsulate the battery cell, which improves the corrosion resistance of the aluminum double-insulated top cover 21 and the corrosion resistance of the aluminum casing of the battery cell.

[0036] The battery module provided in this embodiment includes: multiple battery cells 1, multiple double-insulated top cover modules 2, and conductive modules 3. Each double-insulated top cover module 2 includes an aluminum double-insulated top cover 21 and an insulating module 22. The aluminum double-insulated top cover 21 is disposed on one side of the battery cell terminal 4, and the insulating module 22 is disposed on the side of the aluminum double-insulated top cover 21 away from the battery cell terminal 4. Each battery cell 1 corresponds to one aluminum double-insulated top cover 21. The first end of the conductive module 3 is connected to the power supply battery cell assembly, and the second end of the conductive module 3 passes through… The over-insulation module 22 is connected to each aluminum double-insulated top cover 21 to provide potential to the aluminum double-insulated top cover 21 through the power supply cell group. When the battery module is damaged, the aluminum double-insulated top cover 21 comes into contact with the negative terminal of the cell 1 or the aluminum double-insulated top cover 21 comes into contact with the electrolyte inside the cell 1. This can prevent lithium ions from preferentially reacting with the aluminum double-insulated top cover 21 to form an aluminum-lithium alloy, thereby improving the corrosion resistance of the aluminum double-insulated top cover 21 and effectively improving the reliability and safety of the battery module.

[0037] Further reference Figure 1 and Figure 2 The conductive module 3 includes an integrated busbar 31 and a spring contact 32;

[0038] The first end of the integrated busbar 31 is connected to one of the battery cells 1 in the power supply battery cell group, and the remaining battery cells 1 are connected in sequence. The integrated busbar 31 is connected to the aluminum double-insulated top cover 21 through the spring contact 32, and the spring contact 32 and the aluminum double-insulated top cover 21 are set one-to-one.

[0039] Specifically, if the power supply cell group includes two or more cells 1, the first end of the conductive module 3 is connected to the positive terminal of one of the cells 1 in the power supply cell group, and the remaining cells 1 in the power supply cell group are connected end to end of the cells 1 connected to the conductive module 3. At this time, the power supply cell group can provide a certain potential to the aluminum double-insulated top cover 21 to avoid lithium ions preferentially reacting with the aluminum double-insulated top cover 21 to form an aluminum-lithium alloy, thereby improving the corrosion resistance of the aluminum double-insulated top cover 21.

[0040] For example, such as Figure 1 As shown, the integrated busbar 31 can be designed to include two branch busbars. The first end of the first branch busbar of the integrated busbar 31 is connected to one of the cells 1 in the power supply cell group. The first branch busbar is connected in series with the aluminum insulating top cover 21 of the first branch through spring contact 32. The first end of the second branch busbar of the integrated busbar 31 is connected to the first end of the first branch busbar. The second branch busbar is connected in series with the aluminum insulating top cover 21 of the second branch through spring contact 32. Alternatively, the integrated busbar 31 can be connected in series with the aluminum double insulating top cover 21 through spring contact 32. This embodiment of the utility model does not limit this.

[0041] Furthermore, the integrated busbar is connected in series with the aluminum double-insulated top cover via spring contacts.

[0042] Specifically, the integrated busbar is connected in series with the aluminum double-insulated top cover via spring contacts. This design makes the integrated busbar a single-branch busbar, which reduces the size of the integrated busbar and saves design costs. For example, the integrated busbar is welded to the aluminum double-insulated top cover via spring contacts. Alternatively, one end of the spring contact can be welded to the integrated busbar, and the spring contact can be clipped onto the side of the insulation module near the aluminum double-insulated top cover so that the spring contact contacts the aluminum double-insulated top cover. This embodiment of the present invention does not limit this.

[0043] Furthermore, such as Figure 1 As shown, the integrated busbar 31 includes a first branch busbar 311 and a second branch busbar 312;

[0044] The first end of the first branch busbar 311 is connected to one of the cells 1 in the power supply cell group. The first branch busbar 311 is connected in series with the aluminum insulating top cover 21 of the first branch through the spring contact 32.

[0045] The first end of the second branch busbar 312 is connected to the first end of the first branch busbar 311, and the second branch busbar 312 is connected in series with the aluminum insulating top cover 21 of the second branch through the spring contact 32.

[0046] Specifically, the integrated busbar 31 is designed to include two branch busbars. At this time, the first branch busbar 311 can be in contact with the aluminum double-insulated top cover 21 corresponding to part of the battery cell 1, thereby providing the aluminum double-insulated top cover 21 corresponding to part of the battery cell 1 with a potential through the first branch busbar 311. The second branch busbar 312 is in contact with the aluminum double-insulated top cover 21 corresponding to the remaining battery cell 1, thereby providing the aluminum double-insulated top cover 21 corresponding to the remaining battery cell 1 with a potential through the first branch busbar 311. Thus, when power supply of a certain branch busbar is abnormal, the other branch busbar can provide the aluminum double-insulated top cover 21 corresponding to the remaining battery cell 1 with a potential, thereby effectively avoiding the lithium ion from preferentially reacting with part of the aluminum double-insulated top cover 21 to generate an aluminum-lithium alloy, and reducing the damage rate of the aluminum double-insulated top cover 21 in the battery module.

[0047] Further, the integrated busbar is welded to the aluminum double-insulated top cover through a spring contact.

[0048] Specifically, the integrated busbar is welded to the aluminum double-insulated top cover through a spring contact, which can prevent the integrated busbar from moving randomly with the external environment, so that the power supply battery cell group can provide the aluminum double-insulated top cover with an effective voltage through the integrated busbar, thereby improving the corrosion resistance of the aluminum double-insulated top cover.

[0049] Further, one end of the spring contact is welded to the integrated busbar, and the spring contact is clamped on one side of the insulating module close to the aluminum double-insulated top cover, so that the spring contact is in contact with the aluminum double-insulated top cover.

[0050] Specifically, one end of the spring contact is welded to the integrated busbar, and the spring contact is clamped on one side of the insulating module close to the aluminum double-insulated top cover, so that the spring contact is in contact with the aluminum double-insulated top cover. This can effectively prevent the integrated busbar from moving randomly with the external environment, so that the power supply battery cell group can provide the aluminum double-insulated top cover with an effective voltage through the integrated busbar, thereby improving the corrosion resistance of the aluminum double-insulated top cover. Meanwhile, clamping the spring contact on one side of the insulating module close to the aluminum double-insulated top cover can facilitate disassembly of the integrated busbar when the integrated busbar is abnormal, thereby effectively improving the maintenance efficiency.

[0051] Further, the insulating module includes an insulating film.

[0052] Further, the power supply battery cell group includes two battery cells.

[0053] Specifically, the power supply battery cell group includes two battery cells, which can reduce the energy loss of the battery module under the condition of ensuring that the power supply battery cell group provides appropriate potential for the aluminum double-insulated top cover to improve the corrosion resistance of the battery cell aluminum shell, thereby ensuring that the battery module has sufficient energy to supply power to the external load.

[0054] The embodiment of the utility model provides a kind of battery pack, battery pack includes the battery module of any described above in the above embodiment.The battery pack provided by the embodiment of the utility model includes the battery module as any described in the above technical solution, thus has the beneficial effects of the above battery module, which will not be repeated here.

[0055] The embodiment of the utility model provides a kind of battery detection system, Figure 3 It is a kind of battery detection system structure diagram provided by the embodiment of the utility model, battery detection system includes battery management module 5 and the battery module of any described above in the above embodiment;

[0056] Battery management module 5 is connected with conductive module 3;Battery management module 5 is used for real-time detection voltage signal of conductive module 3, and alarm when voltage signal is abnormal, and provides potential for conductive module 3.

[0057] Specifically, battery management module 5 real-time detection voltage signal of conductive module 3, and when voltage signal is less than preset voltage signal, alarm processing is carried out, reminds staff power supply abnormality of power supply cell group, so that staff timely processing, exemplary, preset voltage in preset voltage signal can be set to 1.5V.Before staff processing, battery management module 5 will provide stable potential to conductive module 3, so that voltage signal is greater than or equal to preset voltage signal, and then lithium ion can be avoided to generate aluminum lithium alloy by preferentially reacting with aluminum double-insulated top cover, and the corrosion resistance of aluminum double-insulated top cover is improved.

[0058] The battery detection system provided by the embodiment of the utility model includes battery management module 5 and the battery module of any described above in the above embodiment, battery management module 5 is connected with conductive module 3, battery management module 5 can real-time detection voltage signal of conductive module 3, alarm when voltage signal is abnormal, and provide potential for conductive module 3, so that battery management module 5 can provide stable potential to conductive module 3 when power supply abnormality of power supply cell group, so that voltage signal is greater than or equal to preset voltage signal, and then when battery module appears damage, aluminum double-insulated top cover and the negative pole of cell 1 contact or aluminum double-insulated top cover and the internal electrolyte of cell 1 contact, lithium ion can be avoided to generate aluminum lithium alloy by preferentially reacting with aluminum double-insulated top cover, and the corrosion resistance of aluminum double-insulated top cover is improved, and the reliability and security of battery module are effectively improved.

[0059] It should be understood that the various forms of flow shown above can be used to reorder, add or delete steps.For example, the steps described in the utility model can be executed in parallel, sequentially or in different order, as long as the desired results of the technical solutions of the utility model can be achieved, which is not limited herein.

[0060] The specific embodiments described above do not constitute a limitation on the protection scope of the present application. Those skilled in the art should understand that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery module, characterized by, The battery module comprises: a plurality of battery cells, a plurality of double-insulated top cover modules, and a conductive module; the double-insulated top cover module comprises an aluminum double-insulated top cover and an insulating module; the aluminum double-insulated top cover is arranged on one side of a battery cell pole, the insulating module is arranged on the side of the aluminum double-insulated top cover away from the battery cell pole, and the battery cell and the aluminum double-insulated top cover are arranged one-to-one; the first end of the conductive module is connected with a power supply battery cell group, the second end of the conductive module passes through the insulating module and is connected with each aluminum double-insulated top cover, so as to provide potential for the aluminum double-insulated top cover through the power supply battery cell group; wherein the power supply battery cell group comprises at least one battery cell.

2. The battery module according to claim 1, wherein the conductive module comprises an integrated busbar and a spring contact; the first end of the integrated busbar is connected with one of the battery cells in the power supply battery cell group, and the remaining battery cells are sequentially connected end-to-end; the integrated busbar is connected with the aluminum double-insulated top cover through the spring contact, and the spring contact and the aluminum double-insulated top cover are arranged one-to-one.

3. The battery module according to claim 2, wherein the integrated busbar is sequentially connected in series with the aluminum double-insulated top cover through the spring contact.

4. The battery module according to claim 2, wherein the integrated busbar comprises a first branch busbar and a second branch busbar; the first end of the first branch busbar is connected with one of the battery cells in the power supply battery cell group, and the first branch busbar sequentially connects the aluminum double-insulated top cover of the first branch through the spring contact; the first end of the second branch busbar is connected with the first end of the first branch busbar, and the second branch busbar sequentially connects the aluminum double-insulated top cover of the second branch through the spring contact.

5. The battery module according to claim 2, wherein the integrated busbar is welded to the aluminum double-insulated top cover through the spring contact.

6. The battery module according to claim 2, wherein one end of the spring contact is welded to the integrated busbar, and the spring contact is clamped on the side of the insulating module close to the aluminum double-insulated top cover, so that the spring contact is in contact with the aluminum double-insulated top cover.

7. The battery module according to claim 1, wherein the insulating module comprises an insulating film.

8. The battery module according to claim 1, wherein the power supply battery cell group comprises two battery cells.

9. A battery pack, characterized by, The battery module according to any one of claims 1-8.

10. A battery detection system, comprising: The battery module according to any one of claims 1-8 and a battery management module; the battery management module is connected with the conductive module; the battery management module is used for detecting the voltage signal of the conductive module in real time, alarming when the voltage signal is abnormal, and providing potential for the conductive module.

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