Battery and battery module

Abstract

The utility model belongs to the technical field of batteries, and particularly relates to a battery, which comprises a conductive shell, a first conductive part, a second conductive part and an insulation part, the first conductive part and the second conductive part are in insulation connection through the insulation part, and the second conductive part is provided with an opening end; the pole column is mounted on the first conductive part and is embedded into the first conductive part; the conducting strip is arranged on the second conducting part and is used for sealing and covering the opening end; the battery cell is mounted in the conductive shell through the open end, and two ends of the battery cell are respectively connected with the pole and the conductive sheet; the battery pack has the beneficial effects that the occupied space of the batteries mounted in the battery pack is reduced, the energy density of the battery pack is improved, and the current conduction between the batteries is realized through the surface contact of the first conductive part and the second conductive part, so that the overcurrent capability of the batteries is improved; and the use of internal structural members of the battery can be reduced, so that more positive electrode materials can be accommodated in the battery, the energy density of the battery is improved, and the production cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of batteries, and particularly relates to a battery and a battery module. Background Art

[0002] With the rapid development of new energy technologies, the application of batteries has become increasingly widespread, resulting in a growing variety of battery types and shapes. The energy density of a battery is one of the important indicators affecting its performance and application range. A higher energy density means that the battery can store more energy and, under the same volume or weight, can provide a longer working time or drive a larger load.

[0003] In the prior art, the pole columns of most batteries are designed as externally protruding structures. When the batteries are assembled into a battery pack, space needs to be reserved for the pole columns inside the battery pack, which to a certain extent limits the number of batteries that can be installed, thus reducing the energy density of the battery pack. Additionally, structural components such as connecting pieces and lower plastic parts are provided inside the battery, occupying a large part of the internal space of the battery, resulting in a reduction in the positive electrode material that can be accommodated inside the battery and a decrease in the energy density of the battery. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a battery and a battery module for the above-mentioned existing technical problems, achieving the effect of improving the energy density.

[0005] In view of this, the utility model provides a battery, including:

[0006] A conductive housing, the conductive housing includes a first conductive part, a second conductive part, and an insulating part. The first conductive part and the second conductive part are insulated and connected through the insulating part, and the second conductive part is provided with an open end;

[0007] A pole column, the pole column is installed on the first conductive part and is embedded inside the first conductive part;

[0008] A conductive sheet, the conductive sheet is installed on the second conductive part and is used to cover the open end;

[0009] A battery cell, the battery cell is installed inside the conductive housing through the open end, and both ends of the battery cell are respectively connected to the pole column and the conductive sheet.

[0010] Further, the first conductive part further includes:

[0011] A mounting hole, the pole column is arranged inside the mounting hole and is fixedly connected to the first conductive part.

[0012] Further, a boss structure is provided on the side of the conductive sheet close to the battery cell.

[0013] Further, the conductive sheet further includes:

[0014] A connecting piece is arranged on the side of the conductive gasket close to the battery cell.

[0015] Wherein, the conductive sheet is connected to the battery cell through the connecting piece.

[0016] Furthermore, the conductive housing further includes:

[0017] A plurality of connecting holes are respectively arranged on the end faces where the first conductive part is connected to the insulating part and the end faces where the second conductive part is connected to the insulating part.

[0018] The insulating part includes:

[0019] A main body part is arranged between the first conductive part and the second conductive part.

[0020] A plurality of connecting parts are arranged on the main body part and are located within the connecting holes.

[0021] Furthermore, it further includes a liquid injection hole, and the liquid injection hole is arranged on the conductive housing.

[0022] Furthermore, the number of the liquid injection holes is several.

[0023] Furthermore, it further includes an explosion-proof valve, and the explosion-proof valve is arranged on the conductive housing or on the conductive sheet.

[0024] Furthermore, it further includes an explosion-proof valve, and the number of the explosion-proof valves is several.

[0025] A battery module includes the battery according to any one of the above.

[0026] The beneficial effects of the present utility model are as follows:

[0027] The battery has no externally protruding structure, reducing the occupied space when the battery is installed in the battery pack, thereby improving the energy density of the battery pack. Moreover, the current conduction between the batteries is achieved through the surface contact of the first conductive part and the second conductive part, and the ability of surface conduction of current is extremely strong. Therefore, the over-current capacity of the battery is greatly increased. In addition, it can also reduce the use of internal structural parts of the battery, enabling more positive electrode materials to be accommodated inside the battery, effectively improving the energy density of the battery, making the battery performance better, and also achieving a weight reduction effect and reducing the production cost of the battery. Description of the Drawings

[0028] Figure 1 It is a schematic structural diagram of the battery in the present utility model;

[0029] Figure 2 It is a schematic structural diagram of the battery from another perspective in the present utility model;

[0030] Figure 3 It is a schematic structural diagram of the conductive sheet in the present utility model;

[0031] Figure 4 It is a schematic structural diagram of the conductive sheet and the connecting sheet in the present utility model.

[0032] Figure 5 It is a schematic connection structure diagram of the battery cell, the conductive sheet and the pole column in the present utility model;

[0033] Figure 6 It is a schematic end structure diagram of the first conductive part in the present utility model;

[0034] Figure 7 It is a schematic structural diagram of the pole column installed on the first conductive part in the present utility model;

[0035] Figure 8 It is a schematic connection structure diagram among the first conductive part, the second conductive part and the insulating part in the present utility model;

[0036] The markings in the figure are shown as:

[0037] 1. First conductive part; 11. Mounting hole; 12. Welding mark; 13. Connecting hole; 2. Second conductive part; 21. Open end; 3. Insulating part; 31. Main body part; 32. Connecting part; 4. Pole column; 5. Conductive sheet; 51. Boss; 52. Connecting sheet; 6. Battery cell. Detailed implementation manners

[0038] Next, the technical solutions in the embodiments of the present application will be clearly described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the protection scope of the present application.

[0039] In the description of the present application, it should be noted that the terms used herein are only for describing specific implementation manners and are not intended to limit the exemplary embodiments of the present application. For the convenience of description, the dimensions of the various parts shown in the drawings are not drawn according to the actual proportional relationship. Technologies, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the said technologies, methods and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further discussed in the subsequent drawings.

[0040] Embodiment 1:

[0041] This embodiment provides a battery, comprising:

[0042] A conductive housing, which includes a first conductive part 1, a second conductive part 2 and an insulating part 3. The first conductive part 1 and the second conductive part 2 are insulated and connected through the insulating part 3, and an open end 21 is provided on the second conductive part 2;

[0043] A pole column 4, which is installed on the first conductive part 1 and is embedded in the first conductive part 1;

[0044] A conductive sheet 5, which is installed on the second conductive part 2 and is used to cover the open end 21;

[0045] A battery cell 6, which is installed in the conductive housing through the open end 21, and both ends of the battery cell 6 are respectively connected to the pole column 4 and the conductive sheet 5.

[0046] In this technical solution, as Figure 1 、 2 shown, the conductive housing can be square or cylindrical. The first conductive part 1 and the second conductive part 2 of the conductive housing are relatively independent and are insulated and connected together through the insulating part 3. The insulating part 3 is composed of high-temperature resistant and corrosion-resistant polymer materials, which can be polyphenylene sulfide (PPS), silicone rubber, fluororubber, acrylate rubber, polytetrafluoroethylene, nylon, etc. The insulating part 3 can be used to block the mutual conduction between the first conductive part 1 and the second conductive part 2. During the preparation process of the battery, the battery cell 6 is put into the conductive housing through the open end 21 of the second conductive part 2. Then, both ends of the battery cell 6 are respectively welded and connected to the pole column 4 and the conductive sheet 5. Then, the pole column 4 is welded to the first conductive part 1 and the pole column 4 is embedded in the first conductive part 1. The conductive sheet 5 is welded to the second conductive part 2 and the open end 21 of the second conductive part 2 is covered, thus replacing the top cover structure of the traditional battery to form the positive and negative electrodes of the battery.

[0047] Through the above structural design, the battery has no externally protruding structure, reduces the occupied space when the battery is installed in the battery pack, improves the energy density of the battery pack, and the current conduction between the batteries is realized through the surface contact of the first conductive part 1 and the second conductive part 2. The ability to conduct current through the surface is extremely strong. Therefore, the over-current capacity of the battery is greatly increased. In addition, through this structural design, the use of internal structural parts of the battery is also reduced, so that more positive electrode materials can be accommodated inside the battery, effectively improving the energy density of the battery and making the battery performance better. It can also play a weight reduction effect and reduce the production cost of the battery.

[0048] Embodiment 2:

[0049] This embodiment provides a battery, which, in addition to including the technical solution of the above embodiment, further has the following technical features.

[0050] Further, the first conductive part 1 further includes:

[0051] An installation hole 11, the pole column 4 is arranged in the installation hole 11 and fixedly connected to the first conductive part 1.

[0052] In this technical solution, as Figure 6 , 7 shown, the shape of the pole column 4 can be square, circular or racetrack-shaped, etc. An installation hole 11 is opened on the first conductive part 1, and the structural shape of the installation hole 11 is adapted to the structural shape of the pole column 4. After the pole column 4 is installed in the installation hole 11, laser welding is carried out for connection and fixation. After the pole column 4 is welded, a welding mark 12 is formed between the pole column 4 and the installation hole 11, and the pole column 4 does not exceed the end face of the first conductive part 1, ensuring that a plane is formed after the pole column 4 and the first conductive part 1 are welded.

[0053] Example 3:

[0054] This embodiment provides a battery, which, in addition to including the technical solution of the above embodiment, further has the following technical features.

[0055] Further, a boss 51 structure is provided on the side of the conductive sheet 5 close to the battery cell 6.

[0056] In this technical solution, the material of the conductive sheet 5 is the same as that of the battery housing. As Figure 3 shown, an integral boss 51 is provided on the conductive sheet 5. Through this structural design, the conductive sheet 5 and the second conductive part 2 can be in closer contact and fit, so that the welding between the conductive sheet 5 and the second conductive part 2 is more firm.

[0057] Further, the conductive sheet 5 further includes:

[0058] A connecting piece 52, the connecting piece 52 is arranged on the side of the conductive sheet 5 close to the battery cell 6;

[0059] Wherein, the conductive sheet 5 is connected to the battery cell 6 through the connecting piece 52.

[0060] In this technical solution, the connecting piece 52 can be welded on the end face of the conductive sheet 5 close to the battery cell 6. The connecting piece 52 is made of a conductive material. The conductive connection between the battery cell 6 and the conductive sheet 5 is realized by welding the pole ear of the battery cell 6 to the connecting piece 52, or the pole ear of the battery cell 6 can be directly welded to the conductive sheet 5.

[0061] Example 4:

[0062] This embodiment provides a battery, which, in addition to including the technical solution of the above embodiment, further has the following technical features.

[0063] Further, the conductive housing further includes:

[0064] A plurality of connection holes 13, which are respectively arranged on the end faces where the first conductive part 1 is connected to the insulating part 3 and the end faces where the second conductive part 2 is connected to the insulating part 3;

[0065] The insulating part 3 includes:

[0066] A main body part 31, which is arranged between the first conductive part 1 and the second conductive part 2;

[0067] A plurality of connection parts 32, and the plurality of connection parts 32 are arranged on the main body part 31 and located within the connection holes 13.

[0068] In this technical solution, a plurality of connection holes 13 are drilled on the two opposite end faces of the first conductive part 1 and the second conductive part 2, and the total area of the connection holes 13 does not exceed 50% of the end face area. The insulating part 3 is a polymer. After the insulating part 3 is melted at high temperature, the polymer is injected into the connection holes 13 in an injection molding manner, and then the first conductive part 1 and the second conductive part 2 are connected together through the insulating part 3 to form a structure as Figure 8 shown.

[0069] Through this structural design, the contact area between the insulating part 3 and the conductive housing is increased, thereby enhancing the connection firmness between the insulating part 3 and the conductive housing, improving the connection strength, and further effectively improving the overall structural stability of the battery housing.

[0070] Example 5:

[0071] This example provides a battery, which, in addition to including the technical solution of the above example, further has the following technical features.

[0072] Further, it further includes a liquid injection hole, and the liquid injection hole is arranged on the conductive housing.

[0073] Further, the number of the liquid injection holes is several.

[0074] In this technical solution, the number of the liquid injection holes arranged on the conductive housing is determined according to the length of the battery, and the setting position is not limited either. Through this structural design, the electrolyte can be filled into the conductive housing to complete the production and manufacturing of the battery.

[0075] Example 6:

[0076] This example provides a battery, which, in addition to including the technical solution of the above example, further has the following technical features.

[0077] Further, it includes an explosion-proof valve, and the explosion-proof valve is arranged on the conductive housing or the conductive sheet 5.

[0078] Further, it further includes explosion-proof valves, and the number of the explosion-proof valves is several.

[0079] In this technical solution, by setting the explosion-proof valves, excessive gas generated inside the battery due to abnormal conditions can be released, preventing the gas pressure inside the battery from being too high and causing the battery case or package to rupture, thereby reducing the risk of explosion or fire.

[0080] Embodiment 7:

[0081] This embodiment provides a battery module, including the battery described in the above Embodiments 1-6.

[0082] In this technical solution, the battery module can be composed of multiple batteries. Multiple batteries along the length direction are connected in series through the positive and negative electrodes of the batteries, and multiple batteries along the width direction can be connected in parallel through direct contact of the conductive housing. Through this structural design, the voltage difference between two batteries after parallel connection of the batteries is not too large, reducing the potential difference, thereby increasing the service life of the battery module.

[0083] The embodiments of the present application have been described above in conjunction with the accompanying drawings. Without conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all of them belong to the protection scope of the present application.

Claims

1. A battery, characterized in that: include: A conductive shell, the conductive shell comprising a first conductive part (1), a second conductive part (2) and an insulating part (3), the first conductive part (1) and the second conductive part (2) being insulated and connected via the insulating part (3), and the second conductive part (2) being provided with an open end (21); A pole (4), the pole (4) being mounted on the first conductive part (1) and embedded in the first conductive part (1); A conductive sheet (5), the conductive sheet (5) being mounted on the second conductive portion (2) and used to seal the opening end (21); A battery core (6), wherein the battery core (6) is installed in a conductive shell through an open end (21), and two ends of the battery core (6) are respectively connected to a pole (4) and a conductive sheet (5).

2. The battery according to claim 1, characterized in that The first conductive part (1) further comprises: A mounting hole (11), wherein the pole (4) is arranged in the mounting hole (11) and is fixedly connected to the first conductive part (1).

3. The battery according to claim 1, characterized in that A boss (51) structure is provided on one side of the conductive sheet (5) close to the battery core (6).

4. The battery according to claim 1, characterized in that The conductive sheet (5) further comprises: A connecting piece (52), the connecting piece (52) being arranged on a side of the conductive pad close to the battery core (6); Wherein, the conductive sheet (5) is connected to the battery core (6) via a connecting sheet (52).

5. The battery according to claim 1, characterized in that The conductive housing further comprises: A plurality of connection holes (13), the plurality of connection holes (13) being respectively arranged on the end surface where the first conductive part (1) is connected to the insulating part (3) and the end surface where the second conductive part (2) is connected to the insulating part (3); The insulating part (3) comprises: A main body portion (31), wherein the main body portion (31) is arranged between the first conductive portion (1) and the second conductive portion (2); A plurality of connection parts (32), wherein the plurality of connection parts (32) are arranged on the main body (31) and are located in the connection hole (13).

6. The battery according to claim 1, characterized in that It also includes a liquid injection hole, which is arranged on the conductive shell.

7. The battery according to claim 6, characterized in that The number of the injection holes is several.

8. The battery according to claim 1, characterized in that It also includes an explosion-proof valve, which is arranged on the conductive shell or on the conductive sheet (5).

9. The battery according to claim 8, characterized in that It also includes explosion-proof valves, and the number of the explosion-proof valves is several.

10. A battery module, characterized in that: A battery comprising any one of claims 1 to 9.

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