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, an insulating part, a battery cell, a first pole and a second pole, the conductive shell comprises a first shell and a second shell, the conductive shell is formed by folding and connecting the first shell and the second shell, the insulating part is arranged at the folding joint of the first shell and the second shell, the first shell is provided with a first conductive part protruding outwards, and the second shell is provided with a second conductive part protruding outwards. The first shell is provided with a first conductive part which protrudes outwards, the second shell is provided with a second conductive part which protrudes outwards, one end of the first pole is detachably connected with the first conductive part, the other end of the first pole is connected with the positive electrode end of the battery cell, one end of the second pole is detachably connected with the second conductive part 121, and the other end of the second pole is connected with the negative electrode end of the battery cell 3. By adopting the battery structure and the battery module provided by the embodiment of the utility model, the problems of high manufacturing cost and low processing efficiency caused by the matching defect between the battery shell and the battery cell in the prior art 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] The important components of the battery structure are the battery shell and the battery cell. The important components of the battery shell are the battery shell and the top cover. The battery cell and the battery shell are connected by the battery pole, so the battery pole is particularly important.

[0003] In the prior art battery structure, there are many welding processes for the battery pole, including ultrasonic welding of the pole ear and laser welding of the top cover. High-precision welding equipment is relatively expensive, with high cost of use and maintenance, and low-precision welding equipment easily leads to the scrapping of the battery.

[0004] The battery structure in the prior art requires multiple welding processes, which results in complex matching between the battery shell and the battery cell, and makes the manufacturing cost of the battery structure high and the processing efficiency low. 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, an insulating portion, a battery cell, a first pole and a second pole,

[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 coupled and connected, the insulating portion is arranged at the coupling position between the first shell and the second shell, the first shell is provided with a first conductive portion protruding outward, and the second shell is provided with a second conductive portion protruding outward,

[0008] One end of the first pole is detachably connected to the first conductive part, and the other end is connected to the positive terminal of the battery cell; one end of the second pole is detachably connected to the second conductive part, and the other end is connected to the negative terminal of the battery cell.

[0009] Optionally, the first pole is threadedly connected to the first conductive part, and the second pole is threadedly connected to the second conductive part.

[0010] Optionally, a first connection end is provided on a side of the first pole close to the battery cell, and the first pole is connected to the battery cell through the first connection end, and a second connection end is provided on a side of the second pole close to the battery cell, and the second pole is connected to the battery cell through the second connection end, and the first connection end and the second connection end are arc surfaces.

[0011] Optionally, the first connection end is detachably connected to the first pole, and the second connection end is detachably connected to the second pole.

[0012] Optionally, the insulating part is a rubber piece.

[0013] Optionally, an explosion-proof valve is further included, and the explosion-proof valve is arranged on the conductive shell.

[0014] Optionally, a liquid injection hole is further included, and the liquid injection hole is arranged on the conductive shell.

[0015] 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.

[0016] The beneficial effects brought by the technical solution provided by the embodiment of the utility model include at least:

[0017] The utility model provides a battery structure and module, in which a first conductive part is protruded on a first shell, and a first pole is arranged inside the first conductive part and connected to the battery cell, so that the inner wall of the first conductive part has a limiting effect on the first pole. A second conductive part is protruded on a second shell, and a second pole is arranged inside the second conductive part and connected to the battery cell, so that the inner wall of the second conductive part has a limiting effect on the second pole. Through this connection form, the connection between the conductive shell and the battery cell is more stable, while the components in the traditional battery structure are reduced, 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

[0018] 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.

[0019] Figure 1 It is a schematic diagram of the overall structure provided by an embodiment of the utility model;

[0020] Figure 2 The utility model embodiment provides Figure 1 A magnified schematic diagram of point A;

[0021] Figure 3 It is a schematic diagram of the battery module structure provided by an embodiment of the utility model.

[0022] In the figure: 1-conductive shell; 11-first shell; 111-first conductive part; 12-second shell; 121-second conductive part; 2-insulating part; 3-battery cell; 41-first pole; 42-second pole; 51-first connecting end; 52-second connecting end; 6-explosion-proof valve; 7-liquid injection hole; 81-first battery structure; 82-second battery structure; 83-third battery structure. DETAILED DESCRIPTION

[0023] 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.

[0024] Figure 1 It is a schematic diagram of the overall structure provided by an embodiment of the utility model; Figure 2 The utility model embodiment provides Figure 1 A magnified schematic diagram of point A; Figure 3 It is a schematic diagram of the battery module structure provided by an embodiment of the utility model. A battery structure includes: a conductive shell 1, an insulating part 2, a battery cell 3, a first pole 41 and a second pole 42, 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 insulating part 2 is arranged at the connection between the first shell 11 and the second shell 12, the first shell 11 is provided with a first conductive part 111 protruding outward, the second shell 12 is provided with a second conductive part 121 protruding outward, one end of the first pole 41 is detachably connected to the first conductive part 111, and the other end is connected to the positive terminal of the battery cell 3, one end of the second pole 42 is detachably connected to the second conductive part 121, and the other end is connected to the negative terminal of the battery cell 3.

[0025] Exemplarily, in an embodiment of the utility model, the first conductive part 111 and the second conductive part 121 are formed by stamping the conductive shell 1 from the inside to the outside, or the conductive shell 1 can be directly cast and formed. The first pole 41 is inserted into the first conductive part 111 and is limited and fixed by the inner wall of the first conductive part 111. The second pole 42 is inserted into the second conductive part 121 and is limited and fixed by the inner wall of the second conductive part 121. The second shell 12 is placed on a workbench with the opening facing upward, and the battery cell 3 is placed in the second shell 12 so that the second pole 42 is connected to the negative terminal of the battery cell 3. The insulating part 2 is placed at the open end of the second shell 12, and then the first shell 11 is placed upside down on the insulating part 2 so that the first pole 41 is connected to the positive terminal of the battery cell 3. The insulating part 2 is then heated and welded 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 serve as the poles of the battery cell, and can be directly connected to another battery structure, or connected to external equipment for charging and discharging, thereby reducing unnecessary structural parts in the traditional battery structure, simplifying the traditional battery structure, reducing manufacturing costs and improving the energy density of the battery structure.

[0026] The embodiment of the utility model provides a battery structure and module, in which a first conductive part 111 is protruded on the first shell 11, and a first pole 41 is arranged inside the first conductive part 111 and connected to the battery cell 3, so that the inner wall of the first conductive part 111 has a limiting effect on the first pole 41. A second conductive part 121 is protruded on the second shell 12, and a second pole 42 is arranged inside the second conductive part 121 and connected to the battery cell 3, so that the inner wall of the second conductive part 121 has a limiting effect on the second pole 42. Through this connection form, the connection between the conductive shell 1 and the battery cell 3 is more stable, while 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.

[0027] Optionally, the first pole 41 is threadedly connected to the first conductive portion 111 , and the second pole 42 is threadedly connected to the second conductive portion 121 .

[0028] Exemplarily, in an embodiment of the utility model, the first pole 41 and the first conductive part 111 and the first pole 41 and the first conductive part 111 are both connected by threads. The threaded connection makes it easy for operators to operate and easy to disassemble and install. At the same time, by providing threads, the limiting effect of the first conductive part 111 on the first pole 41 is strengthened, and the limiting effect of the second conductive part 121 on the second pole 42 is strengthened, thereby improving the stability of the battery structure.

[0029] Optionally, a first connection end 51 is provided on the side of the first pole 41 close to the battery cell 3, and the first pole 41 is connected to the battery cell 3 through the first connection end 51. A second connection end 52 is provided on the side of the second pole 42 close to the battery cell 3, and the second pole 42 is connected to the battery cell 3 through the second connection end 52. The first connection end 51 and the second connection end 52 are arc surfaces.

[0030] For example, in the embodiment of the present utility model, Figure 2 As shown, by providing an arc-shaped connecting surface on the side of the first pole 41 and the second pole 42 close to the battery cell 3, the contact area between the first pole 41 and the second pole 42 and the battery cell 3 can be increased, so that more ions can be converted into energy during the charging and discharging process, thereby improving the energy conversion efficiency of the battery structure.

[0031] Optionally, the first connection end 51 is detachably connected to the first pole 41 , and the second connection end 52 is detachably connected to the second pole 42 .

[0032] Illustratively, in an embodiment of the utility model, by detachably connecting the first connection end 51 to the first pole 41 and detachably connecting the second connection end 52 to the second pole 42, the first connection end 51 and the second connection end 52 can be disassembled and replaced after working for a long time. Since the first connection end 51 and the second connection end 52 are in direct contact with the battery cell 3, long-term operation may cause loss, thereby reducing the energy conversion efficiency of the battery structure. The detachable connection enables the first connection end 51 and the second connection end 52 to be replaced in time, further improving the energy conversion efficiency of the battery structure.

[0033] Optionally, the insulating part 2 is a rubber piece.

[0034] 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 insulating part 2 can maintain high performance even in long-term use, thereby extending the service life of the insulating part 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 insulating part 2 uses rubber and can be heated and welded. After the first shell 11 and the second shell 12 are installed together, the insulating part 2 is welded so that the insulating part 2 completely fits the conductive shell 1 together to form a sealing structure.

[0035] Optionally, an explosion-proof valve 6 is further included, and the explosion-proof valve 6 is arranged on the conductive housing 1 .

[0036] For example, in the embodiment of the utility model, an explosion-proof valve 6 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 6 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 6, the safety performance of the battery structure is improved.

[0037] Optionally, a liquid injection hole 7 is further included, and the liquid injection hole 7 is arranged on the conductive shell 1.

[0038] Illustratively, in an embodiment of the utility model, a liquid injection hole 7 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 7, the operating convenience of the battery structure is improved.

[0039] A battery module, based on the aforementioned battery structure, includes a plurality of battery structures, wherein the conductive shell 1 of each battery structure contacts the conductive shell 1 of another battery structure.

[0040] 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 3 As shown, in the figure, when the upper side of the battery structure is connected to the positive electrode of the battery cell 3 and the lower side is connected to the negative electrode of the battery cell 3, the first battery structure 81 and the second battery structure 82 are connected in series, and the first battery structure 81 and the third battery structure 83 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.

[0041] 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.

[0042] 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: A conductive shell (1), an insulating portion (2), a battery cell (3), a first pole (41) and a second pole (42), 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 insulating portion (2) is arranged at the joint between the first housing (11) and the second housing (12); the first housing (11) is provided with a first conductive portion (111) protruding outwards; the second housing (12) is provided with a second conductive portion (121) protruding outwards; One end of the first pole (41) is detachably connected to the first conductive part (111), and the other end is connected to the positive terminal of the battery cell (3); one end of the second pole (42) is detachably connected to the second conductive part (121), and the other end is connected to the negative terminal of the battery cell (3).

2. A battery structure according to claim 1, characterized in that: The first pole (41) is threadedly connected to the first conductive part (111), and the second pole (42) is threadedly connected to the second conductive part (121).

3. A battery structure according to claim 1, characterized in that: A first connection end (51) is provided on a side of the first pole (41) close to the battery cell (3), and the first pole (41) is connected to the battery cell (3) via the first connection end (51); a second connection end (52) is provided on a side of the second pole (42) close to the battery cell (3), and the second pole (42) is connected to the battery cell (3) via the second connection end (52); the first connection end (51) and the second connection end (52) are arc surfaces.

4. A battery structure according to claim 3, characterized in that: The first connection end (51) is detachably connected to the first pole (41), and the second connection end (52) is detachably connected to the second pole (42).

5. A battery structure according to claim 1, characterized in that: The insulating part (2) is a rubber part.

6. A battery structure according to claim 1, characterized in that: It also comprises an explosion-proof valve (6), wherein the explosion-proof valve (6) is arranged on the conductive housing (1).

7. A battery structure according to claim 1, characterized in that: It also comprises a liquid injection hole (7), wherein the liquid injection hole (7) is arranged on the conductive shell (1).

8. A battery module, based on a battery structure according to any one of claims 1 to 7, 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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