Assemblable battery module case

Abstract

An assemblable battery module case disclosed herein comprises: contact pins including a body part, an elastic body, which is disposed inside the body part and provides an elastic force in one direction in response to a compressive force in the other direction, and a contact part, which is inserted into one side of the body part and made to protrude to one side by the elastic body of the elastic body; module circuit members including through-holes, into which the contact pins can be inserted in one direction and coupled and from which the contact pins can fall out in the other direction and be separated, and a circuit pattern, which is formed on the upper surface or the lower surface, wherein the contact pins are inserted in the through-holes and soldered to the circuit pattern, and the module circuit members wire the plurality of body parts of the contact pins to each other; and a fastening member arranged such that the contact pins fixed to a pair of the module circuit members face each other, a plurality of battery cells are arranged between the facing contact parts, the facing contact parts are in contact with positive electrodes and negative electrodes of the battery cells and fastened by pressing so that the elastic bodies are compressed to generate the elastic force. A battery module in which the plurality of battery cells are connected in series or parallel is configured.

Description

Prefabricated battery module case

[0001] The present invention (Disclosure) relates to an assembly-type battery module case, and more particularly, to an assembly-type battery module case that automatically cuts off a battery cell in which a high current is generated during use and allows intuitive confirmation of the cell by utilizing the structural characteristics of solder that is immediately melted by a high current and contact pins that accumulate elasticity inside.

[0002] The clean energy industry is expanding explosively through various methods, including ESG management.

[0003] Various electric mobile devices that use electric energy as a representative clean energy source are being introduced.

[0004] Electric cars, of course, but also electric scooters, electric kickboards, electric bicycles, and other devices that utilize electric energy as a source of mobility have now become deeply ingrained in our daily lives.

[0005] In particular, electric mobile devices such as electric scooters, electric kickboards, and electric bicycles require relatively less burden in terms of charging locations and times compared to electric vehicles, and are mainly used for short-distance travel. Therefore, their utility is high even with the current battery performance, and their distribution is rapidly expanding.

[0006] However, the secondary batteries that power these electric mobile devices are becoming the center of our country's manufacturing industry.

[0007] As the popularity of electric mobile devices expands and increases, the demand for secondary batteries installed in them also increases rapidly.

[0008] However, recently, various issues have been raised regarding secondary batteries.

[0009] First of all, current secondary batteries can be recognized as a form of clean energy that uses electricity to generate carbon-free energy. However, as the various and fatal environmental pollutions generated during the manufacturing process become known, the question is being raised as to whether electric mobile devices using secondary batteries are truly clean energy means of transportation.

[0010] Additionally, secondary batteries, which are produced and consumed in massive quantities, pose many challenges regarding their disposal or recycling.

[0011] Because recycling and reuse industrial facilities are not yet sufficiently expanded, continued consumption of various mineral resources, which are already scarce, is necessary.

[0012] In addition, the various secondary batteries currently being developed are products focused on improving performance, such as charging capacity and fast charging, and the development of products with structural features suitable for recycling or reuse after typical lifespan use is still in its infancy.

[0013] Therefore, there is an urgent need to develop secondary batteries suitable for reuse and recycling, and in particular, for electric mobile devices, which are expected to have a higher penetration rate than electric vehicles, there is an emerging need to develop a power supply system for electric mobile devices that is easy to recycle or reuse, from battery packs and modules to battery cells.

[0014] The present invention (Disclosure) aims to provide an assembly-type battery module case that automatically cuts off the connection to the battery cell when a high current is generated during use or a short circuit occurs during the assembly and disassembly process, and allows intuitive confirmation of the cut-off battery cell.

[0015] According to one aspect of the present invention, there is provided an assembly-type battery module case, comprising: a body part; an elastic body disposed inside the body part and providing elastic force in one direction in response to a compressive force in the other direction; and a contact part inserted into one side of the body part and protruding in one direction by the elastic body of the elastic body; a contact pin including a through hole formed so that the contact pin can be inserted and coupled in one direction and removed and separated in the other direction; and a circuit pattern formed on an upper or lower surface, wherein the contact pin is disposed to penetrate the through hole and is soldered to the circuit pattern, and a module circuit member that connects between the plurality of contact pin body parts; And a fastening member that places a pair of the above module circuit members such that the contact pins fixed thereto face each other, places a plurality of battery cells between the facing contact portions, and presses the facing contact portions to contact the positive and negative poles of the battery cells so that the elastic body is compressed to generate the elastic force, thereby fastening the battery module; and the plurality of battery cells constitute a battery module in which the above battery cells are connected in series or in parallel.

[0016] In an assembly battery module case according to one aspect of the present invention, the circuit pattern may be a printed circuit board on which a wiring circuit for connecting the battery cells in series or parallel is formed.

[0017] In an assembly battery module case according to one aspect of the present invention, the body portion of the contact pin may further include a protruding flange protruding from an outer circumferential surface.

[0018] In an assembly battery module case according to one aspect of the present invention, a set of protection plates may be further included, including an upper protection plate made of an insulating material and having a protruding hole through which the contact portion protrudes upward, covering an upper surface of the module circuit member; and a lower protection plate made of an insulating material and having a lower groove in which a part of the other side of the contact pin fixed to the module circuit member is received, covering a lower surface of the module circuit member.

[0019] In an assembly-type battery module case according to one aspect of the present invention, the lower groove may be formed deeper than the length by which the contact pin fixed to the module circuit member protrudes downward from the module circuit member.

[0020] According to the present invention, by utilizing the structural characteristics of solder that is immediately melted by the high current generated when a high current is generated and contact pins that accumulate elasticity inside, a short circuit phenomenon that occurs during the assembly and disassembly process and a battery cell that is subject to a high current during use are automatically blocked, and the corresponding cell can be intuitively checked.

[0021] Figures 1 and 2 are drawings showing a first embodiment of an assembled battery module case according to the present invention.

[0022] Figures 3 and 4 are drawings showing a second embodiment of an assembled battery module case according to the present invention.

[0023] Figure 5 is a drawing showing a third embodiment of an assembled battery module case according to the present invention.

[0024] Hereinafter, an embodiment of an assembled battery module case according to the present invention will be described in detail with reference to the drawings.

[0025] The terms used below have been selected for convenience of explanation, and therefore, in understanding the intrinsic technical idea of ​​the present invention, they should be appropriately interpreted in a meaning that is consistent with the technical idea of ​​the present invention, without being limited to their dictionary meanings.

[0026] FIG. 1 and FIG. 2 are drawings showing a first embodiment of an assembled battery module case according to the present invention.

[0027] According to FIGS. 1 and 2, the assembled battery module case according to the present embodiment includes a plurality of contact pins (100), a module circuit member (200) to which the contact pins (100) are fixed, and a fastening member (not shown).

[0028] The contact pin (100) includes a body (130), an elastic body (120), and a contact portion (110).

[0029] The body part (130) forms the body of the contact pin (100) and accommodates a portion of the elastic body (120) and the contact part (110) described later.

[0030] The elastic body (120) is placed inside the body part (130) and provides elastic force in one direction in response to compressive force in the other direction.

[0031] The contact portion (110) is inserted into one side of the body portion (130) and protrudes from the end of the body portion (130) by the elastic body of the elastic body (120).

[0032] At this time, the contact pin (100) may further include an insertion body (140) that is positioned in the opposite direction to the contact portion (110) and is inserted into the body portion (130) so as to increase or decrease the overall length.

[0033] The module circuit member (200) has a through hole and a circuit pattern, and a contact pin (100) is arranged to pass through the through hole and is soldered to the circuit pattern, and a connection is made between the body parts of a plurality of contact pins.

[0034] The through hole is formed so that the contact pin (100) can be inserted in one direction to be combined and removed in the other direction to be separated.

[0035] In addition, the circuit pattern is formed on the upper or lower surface of the module circuit member (200), and connects between soldered contact pins, especially between the body parts, to enable serial or parallel connection between battery cells that are in contact with the contact portion (110) as described later.

[0036] The fastening member (not shown) is configured to have a pair of module circuit members (200) installed.

[0037] A pair of module circuit members (200) are arranged so that the contact pins (100) fixed to each of them face each other.

[0038] A plurality of battery cells are arranged between facing contact pins (100) (specifically, contact portions (110)).

[0039] At this time, the facing contact portion (110) is compressed by the elastic body (120) by the battery cell (1), and as a result, is pressurized. Thus, the battery cell (1) is fastened.

[0040] The assembled battery module case according to the present embodiment constitutes a battery module in which a plurality of battery cells are connected in series or parallel.

[0041] In addition, in the assembled battery module case according to the present embodiment, when a situation occurs in which a high current flows to a specific contact pin (100), the contact pin (100) is separated from the module circuit member (200) connected by soldering, and at the same time, the contact portion (110) is separated from the electrode of the battery cell (100a).

[0042] That is, as a high current flows, the contact pin (100) is heated, and as a result, the solder is instantly melted, which weakens the bonding force between the contact pin (100) and the module circuit member (200), and at this time, the contact pin (100) is bounced off in the opposite direction to the battery cell (1) due to the elastic force accumulated in the elastic body.

[0043] Accordingly, the high current discharge phenomenon is stopped, and since the contact pin (100) is separated from the module circuit member (200), the battery cell through which the high current flows can be clearly and intuitively confirmed.

[0044] The following are representative situations in which high current can flow through the contact pin (100).

[0045] First, due to performance issues of the battery cell (1), the internal resistance of the battery cell itself may abnormally decrease, causing a phenomenon in which a high current flows.

[0046] Next, a high current may be generated in a specific contact pin (100) due to a short-circuit phenomenon that occurs during the disassembly or separation work for performance evaluation of battery cells (1) included in the assembled battery module case according to the present embodiment.

[0047] These phenomena can prevent secondary accidents such as fires from occurring only when the cause is eliminated immediately upon occurrence. Since the contact pin (100) is detached from the module circuit member (200) due to the heat generation phenomenon caused by the high current that initially occurs in the assembled battery module case according to the present embodiment, the circuit is automatically cut off, which has the effect of eliminating the cause of the high current generation phenomenon.

[0048] In the assembled battery module case according to the present embodiment, a fastening member (not shown) penetrates the module circuit member (200) and the protective plate set (300) described below and detachably fastens the contact pin (100) and the protective plate set (300).

[0049] The fastening member (not shown) may be composed of a bolt penetrating the protective plate set (300) and a nut coupled thereto, or may be a separate housing case in which the battery cell (1) and the protective plate set (300) are accommodated.

[0050] In addition, in the assembled battery module case according to the present embodiment, the circuit pattern is preferably a printed circuit board having a wiring circuit formed to connect battery cells in series or parallel.

[0051] FIG. 3 and FIG. 4 are drawings showing a second embodiment of an assembled battery module case according to the present invention.

[0052] According to FIGS. 3 and 4, in the assembled battery module case according to the present embodiment, the body part (130) of the contact pin (100) further includes a protruding flange (150) protruding from the outer circumferential surface.

[0053] By employing a protruding flange (150), the height of the contact portion (110) can be maintained constant when the contact pin (100) is combined with the module circuit member (200).

[0054] This can maintain the elastic force formed in the elastic body (120) at a constant level, so that each of the plurality of contact pins (100) fixed to the module circuit member (200) can have the same elastic force.

[0055] FIG. 5 is a drawing showing a third embodiment of an assembled battery module case according to the present embodiment.

[0056] Referring to FIG. 5, the assembled battery module case according to the present embodiment further includes a protective plate set (300) including an upper protective plate (310) and a lower protective plate (320) in the assembled battery module case of FIG. 4.

[0057] The upper protection plate (310) is made of an insulating material and has a protruding hole through which the contact portion (110) protrudes to the upper surface, and covers the upper surface of the module circuit member (200).

[0058] In addition, the lower protection plate (320) is made of an insulating material and has a lower groove (321) in which a part of the other side of a contact pin (100) fixed to the module circuit member (200) is accommodated, thereby covering and protecting the lower surface of the module circuit member (200).

[0059] In addition, in the assembled battery module case according to the present embodiment, it is preferable that the lower groove (321) be formed deeper than the length by which the contact pin (100) fixed to the module circuit member (200) protrudes downward from the module circuit member (200).

[0060] At this time, it is obvious that the thickness of the lower protection plate (320) is formed thicker than the length of the contact pin (100) fixed to the module circuit member (200) protruding to the lower side of the module circuit member (200).

[0061] In addition, another type of lower groove (321a) may not be formed in a penetrating shape but may have a cup structure with a closed lower side to prevent loss of the contact pin, etc.

Claims

1. A body part; an elastic body arranged inside the body part and providing elastic force in one direction in response to a compressive force in another direction; and a contact pin including a contact part inserted into one side of the body part and protruding to one side by the elastic body of the elastic body; A module circuit member having a through hole formed so that the contact pin can be inserted and combined in one direction and removed and separated in the other direction; and a circuit pattern formed on an upper or lower surface, wherein the contact pin is arranged to penetrate the through hole and is soldered to the circuit pattern, and which connects between the plurality of contact pin body parts; and A pair of the above module circuit members are arranged so that the contact pins fixed to each of them face each other, and a plurality of battery cells are arranged between the facing contact portions, and the facing contact portions are connected by applying pressure so that the elastic body is compressed and the elastic force is generated by contacting the positive and negative poles of the battery cells. An assembled battery module case that configures a battery module in which the above plurality of battery cells are connected in series or parallel.

2. In claim 1, The above circuit pattern is, An assembled battery module case, which is a printed circuit board having a wiring circuit formed thereon for connecting the above battery cells in series or parallel.

3. In claim 1, The body part of the above contact pin, An assembled battery module case further comprising a protruding flange protruding from an outer surface.

4. In claim 1, An upper protective plate having a protruding hole through which the contact part protrudes upward as an insulating material and covering the upper surface of the module circuit member; and An assembled battery module case further comprising a set of protective plates, the protective plates including a lower protective plate that covers the lower surface of the module circuit member and has a lower groove in which a part of the other side of the contact pin fixed to the module circuit member is received as an insulating material.

5. In claim 4, The above lower groove is, An assembled battery module case in which the contact pin fixed to the module circuit member is formed deeper than the length protruding downward from the module circuit member.

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