Battery structure and module

Abstract

The utility model provides a battery structure and a module, and belongs to the field of new energy batteries. The structure comprises a conductive shell, a sealing ring and a battery cell, the conductive shell comprises a first shell and a second shell, each of the first shell and the second shell is of a box-shaped structure with an opening at one end, each of the first shell and the second shell comprises a side plate and a bottom plate, and the first shell and the second shell are connected through the openings; the sealing ring is arranged at the joint of the first shell and the second shell, one surface of the first shell is provided with a first conductive part which is concave inwards, one surface of the second shell is provided with a second conductive part which is concave inwards, and the battery cell is provided with an insertion hole which is matched with the first conductive part and the second conductive part 1. By adopting the battery structure and the battery module provided by the embodiment of the utility model, the problems in the prior art that the manufacturing cost is relatively high and the matching between the battery shell and the battery core is relatively complicated can be solved.

Description

Technical Field

[0001] The utility model relates to the field of new energy batteries, and in particular to a battery structure and a module. Background Art

[0002] With the application and development of lithium batteries, battery casings and cells, as important components of batteries, are also facing new developments in their structural forms.

[0003] The structure of the shell and battery cell of commercial batteries is relatively complex, resulting in high manufacturing costs. The commercial battery shell includes a top cover and a battery shell. The top cover is a collection of poles, explosion-proof valves and injection holes. The top cover accounts for most of the cost of the battery shell, and the structure of the top cover and battery shell being designed separately will increase the initial manufacturing cost of the battery. The battery cell needs to be welded to the connecting piece and then to the pole of the top cover, and finally the top cover needs to be welded to the battery shell.

[0004] The battery structure in the prior art requires multiple welding processes, and the multiple welding processes lead to complex matching between the battery shell and the battery cell, resulting in high manufacturing costs and low processing efficiency. Utility Model Content

[0005] The present utility model provides a battery structure and module, which can solve the problems of high manufacturing cost and low processing efficiency caused by the matching defects between the battery shell and the battery core in the prior art. The technical solution is as follows:

[0006] In a first aspect, a battery structure includes: a conductive shell, a sealing ring and a battery cell,

[0007] The conductive shell comprises a first shell and a second shell, the conductive shell is formed by the first shell and the second shell being joined together, the sealing ring is arranged at the joint between the first shell and the second shell, the first shell is provided with a first conductive part recessed inwardly on one side, and the second shell is provided with a second conductive part recessed inwardly on one side,

[0008] The positive terminal of the battery cell is connected to the first conductive part, and the negative terminal of the battery cell is connected to the second conductive part.

[0009] Optionally, a first plugging hole matching the first conductive part is provided on the battery core, and a second plugging hole matching the second conductive part is provided on the battery core.

[0010] Optionally, the first shell and the second shell are both box-type structures with an opening, and the first shell and the second shell both include side panels and a bottom panel.

[0011] Optionally, the first conductive portion and the second conductive portion are located on the bottom plate.

[0012] Optionally, the first conductive portion and the second conductive portion are located on the side plate.

[0013] Optionally, it also includes a first plug hole and a second plug hole, the battery cell is square, including a top surface and four side surfaces connected to the top surface, the first plug hole and the second plug hole are arranged on the top surface, and the first plug hole and the second plug hole are respectively connected to the two opposite side surfaces.

[0014] Optionally, the sealing ring is a rubber piece.

[0015] Optionally, an explosion-proof valve is further included, and the explosion-proof valve is arranged on the conductive shell.

[0016] Optionally, a liquid injection hole is further included, and the liquid injection hole is arranged on the conductive shell.

[0017] In a second aspect, a battery module, based on the aforementioned battery structure, comprises a plurality of the battery structures, wherein a conductive shell of each battery structure contacts a conductive shell of another battery structure.

[0018] The beneficial effects brought by the technical solution provided by the embodiment of the utility model include at least:

[0019] A battery structure and module provided by an embodiment of the utility model, by providing a first conductive part recessed inwardly on the first shell and a second conductive part recessed inwardly on the second shell, so that the first conductive part and the second conductive part directly act as the poles of the traditional battery structure, so that they are directly plugged into the battery cell, reducing the parts in the traditional battery structure, effectively reducing the complexity of the traditional battery structure, and can effectively solve the problems of high manufacturing cost and low processing efficiency caused by the matching defects between the battery shell and the battery cell in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 It is a schematic diagram of the battery structure assembly provided by the embodiment of the utility model;

[0022] Figure 2 This is another schematic diagram of a conductive housing provided by an embodiment of the utility model;

[0023] Figure 3This is a schematic diagram of a main view of a battery cell provided by an embodiment of the utility model;

[0024] Figure 4 The utility model embodiment provides Figure 3 A-direction cross-sectional schematic diagram;

[0025] Figure 5 It is a schematic diagram of battery module assembly provided by an embodiment of the utility model.

[0026] In the figure: 1-conductive shell; 11-first shell; 111-first conductive part; 12-second shell; 121-second conductive part; 2-sealing ring; 3-battery cell; 31-top surface; 32-side surface; 4-side plate; 5-bottom plate; 61-first plug hole; 62-second plug hole; 7-explosion-proof valve; 8-liquid injection hole; 91-first battery structure; 92-second battery structure; 93-third battery structure. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0028] Figure 1 It is a schematic diagram of the battery structure assembly provided by the embodiment of the utility model; Figure 2 This is another schematic diagram of a conductive housing provided by an embodiment of the utility model; Figure 3 This is a schematic diagram of a main view of a battery cell provided by an embodiment of the utility model; Figure 4 It is a schematic side view of a battery cell provided by an embodiment of the utility model; Figure 5 Schematic diagram of the battery module assembly provided by the embodiment of the utility model. Figures 1 to 5 A battery structure shown includes: a conductive shell 1, a sealing ring 2 and a battery cell 3, the conductive shell 1 includes a first shell 11 and a second shell 12, the conductive shell 1 is formed by the first shell 11 and the second shell 12 being connected and formed, the sealing ring 2 is arranged at the connection between the first shell 11 and the second shell 12, a first conductive portion 111 recessed inwardly is provided on one side of the first shell 11, and a second conductive portion 121 recessed inwardly is provided on one side of the second shell 12, the positive terminal of the battery cell 3 is connected to the first conductive portion 111, and the negative terminal of the battery cell is connected to the second conductive portion 121.

[0029] For example, in the embodiment of the utility model, the opening ends of the first shell 11 and the second shell are both provided with a sealing ring 2, the battery cell 3 is placed inside the conductive shell, and the first conductive part 111 and the second conductive part 121 are respectively connected to the positive and negative electrodes of the battery cell 3, so that the first conductive part 111 and the second conductive part 121 act as the poles of the battery cell 3, and the first shell 11 and the second shell 12 are both conductive materials. At this time, the first shell 11 and the second shell 12 can be regarded as two poles of the battery cell 3. When the battery cell 3 is installed, the sealing ring 2 carried on the first shell 11 and the second shell 12 fit together, and the sealing ring 2 is welded at this time, so that the first shell 11 and the second shell 12 are completely connected together to form a sealed structure. The first conductive part 111 and the second conductive part 121 can directly act as the poles of the battery cell, and can be directly connected to another battery structure, or connected to an external device for charging and discharging, thereby reducing unnecessary structural parts in the traditional battery structure, simplifying the traditional battery structure, reducing the manufacturing cost and improving the energy density of the battery structure.

[0030] A battery structure and module provided by an embodiment of the utility model, by providing an inwardly recessed first conductive portion 111 on the first shell 11 and an inwardly recessed second conductive portion 121 on the second shell 12, so that the first conductive portion 111 and the second conductive portion 121 directly act as poles of a traditional battery structure, so that they are directly plugged into the battery cell 3, reducing the parts in the traditional battery structure, effectively reducing the complexity of the traditional battery structure, and can effectively solve the problems of high manufacturing cost and low processing efficiency caused by the matching defects between the battery shell and the battery cell in the prior art.

[0031] Optionally, a first plugging hole 61 matching the first conductive portion 111 is formed on the battery core 3 , and a second plugging hole 62 matching the second conductive portion 121 is formed on the battery core 3 .

[0032] Illustratively, in an embodiment of the utility model, a first plug hole 61 and a second plug hole 62 are provided on the battery cell 3, so that the contact mode between the first conductive part 111 and the second conductive part 121 and the battery cell 3 is changed from point contact to surface contact, thereby increasing the contact area, making the connection between the first conductive part 111 and the second conductive part 121 and the battery cell 3 more stable, thereby improving the stability of the structure.

[0033] Optionally, the first shell 11 and the second shell 12 are both box-shaped structures with an opening, and the first shell 11 and the second shell 12 both include a side plate 4 and a bottom plate 5 .

[0034] Exemplarily, in the embodiment of the utility model, the first shell 11 and the second shell 12 are both box-shaped structures with an opening, which can make the conductive shell 1 adapt to the square shape of the battery cell 3, so that the conductive shell 1 can accommodate a larger volume of the battery cell 3, thereby increasing the energy density of the battery and improving the energy conversion efficiency of the structure.

[0035] Optionally, the first conductive portion 111 and the second conductive portion 121 are located on the bottom plate 5 .

[0036] For example, in the embodiment of the present utility model, Figure 1 As shown, when the first conductive part 111 and the second conductive part 121 are located on the bottom plate 5, the battery cell 3 only needs to be provided with a plug hole 6 matching the first conductive part 111 and the second conductive part 121 on the opposite side. When installing and matching, the opening of the first conductive housing 11 is placed along the direction of the workbench, and the plug hole 6 on one side of the battery cell 3 is matched with the first conductive part 111 for installation. Then, the second housing 12 is moved from the other side toward the first housing 11, so that the plug hole 6 on the other side of the battery cell 3 is matched with the second conductive part 121 for installation. This structure makes the structure of the battery cell 3 simpler, and the operation is easier when assembling the conductive housing 1 and the battery cell 3.

[0037] Optionally, the first conductive portion 111 and the second conductive portion 121 are located on the side plate 4 .

[0038] For example, in the embodiment of the present utility model, Figure 2 As shown, the first conductive part 111 and the second conductive part 121 are located on the same side of the conductive shell 1, and the first conductive part 111 and the second conductive part 121 form the positive pole or the negative pole of the battery cell 3. An external energy supply device or energy consumption device is connected to the pole, so that the battery cell 3 can be charged by the external device or supply power to the external device. This structure is suitable for the situation where the lines of the external device are located on the same side, making it more convenient to connect the first conductive part 111 and the second conductive part 121 to the external device.

[0039] Optionally, it also includes a first plug-in hole 61 and a second plug-in hole 62. The battery cell 3 is square, including a top surface 31 and four side surfaces 32 connected to the top surface 31. The first plug-in hole 61 and the second plug-in hole 62 are arranged on the top surface 31, and the first plug-in hole 61 and the second plug-in hole 62 are respectively connected to the two opposite side surfaces 32.

[0040] For example, in the embodiment of the utility model, in order to cooperate with the first conductive part 111 and the second conductive part 121 to be located on the side plate 4, so as to facilitate the battery cell 3 to be placed inside the conductive housing 1, the battery cell 3 is provided as follows: Figure 3 and Figure 4In the structural form shown, when installing and matching, the second shell 12 is placed on the work surface, and the battery cell 3 is placed in the second shell 12, so that the second plug hole 62 and the second conductive part 121 are inserted and matched, and then the first shell 11 is turned upside down on the second shell 12, so that the first conductive part 111 is matched with the first plug hole 61. Since the plug hole 6 is designed as a groove structure, when the first shell 11 and the second shell 12 are matched, there will be no interference between the first conductive part 111 and the second conductive part 121 and the battery cell 3, making the installation of the conductive shell 1 smoother.

[0041] Optionally, the sealing ring 2 is a rubber piece.

[0042] Illustratively, in the embodiment of the utility model, rubber has the properties of high temperature resistance, corrosion resistance, high mechanical strength, etc., so that the sealing ring 2 can maintain high performance even in long-term use, thereby extending the service life of the sealing ring 2. At the same time, rubber is also an insulating material, so that the first shell 11 and the second shell 12 are insulated and isolated. On the other hand, the sealing ring 2 can be welded twice using rubber. After the first shell 11 and the second shell 12 are installed together, the sealing ring 2 is welded so that the sealing ring 2 completely fits the conductive shell 1 together to form a sealing structure.

[0043] Optionally, an explosion-proof valve 7 is further included, and the explosion-proof valve 7 is arranged on the conductive housing 1 .

[0044] For example, in the embodiment of the utility model, an explosion-proof valve 7 is provided. The fundamental reason for the thermal runaway of the battery cell 3 is that the exothermic side reaction inside the battery cell 3 causes heat accumulation. The rate of heat exchange of the battery cell 3 to the outside is less than the heat accumulation rate. The temperature continues to rise until it reaches the ignition point temperature, causing combustion and explosion. In order to prevent the occurrence of thermal runaway accidents and avoid the imbalance of pressure inside and outside the battery structure, and considering that a large amount of toxic gas will be instantly generated when a lithium battery catches fire, it is necessary to release the pressure and discharge the gas in a timely and directional manner. The explosion-proof valve 7 can achieve the requirements of maintaining the pressure balance inside and outside the battery structure and the directional release of gas, as a passive safety protection measure for the battery system to prevent thermal runaway. By providing the explosion-proof valve 7, the safety performance of the battery structure is improved.

[0045] Optionally, a liquid injection hole 8 is further included, and the liquid injection hole 8 is arranged on the second conductive shell 1.

[0046] Illustratively, in an embodiment of the utility model, a liquid injection hole 8 is provided on the conductive shell 1, which is convenient for injecting electrolyte into the conductive shell 1 after the conductive shell 1 is installed and sealed. By providing the liquid injection hole 8, the operating convenience of the battery structure is improved.

[0047] A battery module, based on the aforementioned battery structure, comprises a plurality of battery structures, wherein the conductive shell 1 of each battery structure contacts the conductive shell 1 of another battery structure.

[0048] For example, in the utility model embodiment, multiple battery structures are combined into a battery module. Since the conductive shell 1 is made of conductive material, the first shell 11 and the second shell 12 are respectively connected to the positive and negative electrodes of the battery cell 3, so that the first shell 11 and the second shell 12 form the positive and negative electrodes of the battery structure. When the battery module is combined, the conductive shell 1 of multiple battery structures can be directly contacted with the conductive shell 1 of another battery structure to form a series structure or a parallel structure, so as to increase the total power of the battery module. Figure 5 As shown, in the figure, when the left side of the battery structure is connected to the positive electrode of the battery cell 3 and the right side is connected to the negative electrode of the battery cell 3, the first battery structure 91 and the second battery structure 92 are connected in series, and the first battery structure 91 and the third battery structure 93 are connected in parallel. By adjusting the first shell 11 and the second shell 12 in each battery structure to be connected to the positive and negative electrodes of the battery cell 3 respectively, the series-parallel structure in the battery module is adjusted. The battery module set by this method reduces the use of structural parts in the battery assembly process and reduces the cost in the battery production process. At the same time, due to the reduction of redundant structural parts, the weight of the battery is reduced, thereby improving the energy density of the battery.

[0049] Unless otherwise defined, the technical terms or scientific terms used herein shall have the usual meanings understood by persons with ordinary skills in the field to which the utility model belongs. The words "first", "second" and similar words used in the specification and claims of the utility model patent application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "one" do not indicate a quantity limitation, but indicate the existence of at least one. Words such as "include" or "comprise" mean that the elements or objects appearing before "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0050] The above description is only an optional embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A battery structure, characterized in that: include: Conductive housing (1), sealing ring (2) and battery core (3), The conductive housing (1) comprises a first housing (11) and a second housing (12); the conductive housing (1) is formed by the first housing (11) and the second housing (12) being joined and connected; the sealing ring (2) is arranged at the joint between the first housing (11) and the second housing (12); one side of the first housing (11) is provided with a first conductive portion (111) recessed inwardly; one side of the second housing (12) is provided with a second conductive portion (121) recessed inwardly; The positive terminal of the battery cell (3) is connected to the first conductive part (111), and the negative terminal of the battery cell is connected to the second conductive part (121).

2. A battery structure according to claim 1, characterized in that: The battery core (3) is provided with a first plugging hole (61) matching the first conductive part (111), and the battery core (3) is provided with a second plugging hole (62) matching the second conductive part (121).

3. A battery structure according to claim 1, characterized in that: The first shell (11) and the second shell (12) are both box-shaped structures with an opening, and the first shell (11) and the second shell (12) both include a side plate (4) and a bottom plate (5).

4. A battery structure according to claim 3, characterized in that: The first conductive part (111) and the second conductive part (121) are located on the bottom plate (5).

5. A battery structure according to claim 3, characterized in that: The first conductive portion (111) and the second conductive portion (121) are located on the side plate (4).

6. A battery structure according to claim 5, characterized in that: The battery cell (3) further comprises a first plug hole (61) and a second plug hole (62); the battery cell (3) is square, comprising a top surface (31) and four side surfaces (32) connected to the top surface (31); the first plug hole (61) and the second plug hole (62) are arranged on the top surface (31); the first plug hole (61) and the second plug hole (62) are respectively connected to two opposite side surfaces (32).

7. A battery structure according to claim 1, characterized in that: The sealing ring (2) is a rubber piece.

8. A battery structure according to claim 1, characterized in that: It also comprises an explosion-proof valve (7), wherein the explosion-proof valve (7) is arranged on the conductive housing (1).

9. A battery structure according to claim 1, characterized in that: It also comprises a liquid injection hole (8), wherein the liquid injection hole (8) is arranged on the conductive shell (1).

10. A battery module, based on a battery structure according to any one of claims 1 to 9, characterized in that: The invention comprises a plurality of battery structures, wherein the conductive shell (1) of each battery structure is in contact with the conductive shell (1) of another battery structure.

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