Battery pack case

Abstract

A battery pack case (1000) is disclosed. The disclosed battery pack case (1000) is formed in a pipe shape to accommodate a battery cell assembly in an internal space, has a supporting rib (110) formed on an inner surface, and has a case body (100) formed in a corrugated shape on an outer surface; A pair of covers (200) coupled to the openings on both sides of the case body (100); and It includes a controller that controls the overall operation of the battery pack case (1000), and The above case body (100) is characterized by increasing the surface area due to the corrugated shape formed on the outer surface of the case body (100), thereby easily transferring heat generated by the battery cell to the outside.

Description

Technology Field

[0001] The present invention relates to a battery pack case, and more specifically, to a battery pack case equipped with a temperature sensor and a pressure sensor on the inside of the case body to transmit a warning signal to an administrator when the pressure or temperature inside the case body is higher than a preset pressure value or temperature value, while load cells are mounted on both sides of the case body to illuminate a warning lamp when the fastening load measured by the load cells is less than a preset load, and a rubber plug with a conical flow path formed inside is inserted into a through hole formed in the case body so that when the pressure inside the case body reaches a level higher than a preset pressure, the conical flow path opens to discharge high-pressure air to the outside. Background Technology

[0003] With the acceleration of electrification these days, secondary battery packs are being used not only in portable electronic devices but also in various mobility products such as cars and scooters.

[0004] A battery pack is assembled by stacking multiple battery cells inside a battery case.

[0005] The electrodes of the stacked battery cells come into contact with the electrode plates of the battery pack, allowing current to flow.

[0006] If the battery cell overheats, the temperature and pressure inside the battery case rise, which may cause the case to explode or lead to a fire.

[0007] Conventionally, to prevent these problems, cases were manufactured using materials with higher strength.

[0008] However, using high-strength materials increases costs, which becomes a factor that reduces product competitiveness.

[0009] Meanwhile, the battery case is designed to maintain airtightness due to reasons such as electrical leakage.

[0010] If abnormal pressure is temporarily formed inside such a battery case, it is necessary to properly notify the manager for risk management, and appropriate means to relieve the abnormal pressure are required.

[0011] Therefore, there is an urgent need to develop a new battery pack case that can warn the manager of danger when abnormal temperature and pressure form inside the battery pack case, and can resolve such abnormal temperature and pressure. Prior art literature

[0013] Korean Published Patent Application No. 10-2023-0030422 The problem to be solved

[0014] The present invention is proposed to solve the above-mentioned problem and aims to provide a danger warning to an administrator when abnormal temperature and pressure are formed inside the battery pack case.

[0015] In addition, the present invention aims to relieve abnormal temperature and pressure formed inside the battery pack case.

[0016] In addition, the present invention aims to cause a warning lamp to light up when the fastening load of the battery pack case cover is low. means of solving the problem

[0018] The present invention relates to a battery pack case into which a battery cell assembly is inserted, wherein:

[0019] A case body formed in a pipe shape to accommodate a battery cell assembly in an internal space, having supporting ribs formed on the inner surface and a corrugated shape formed on the outer surface;

[0020] A pair of covers coupled to the openings on both sides of the case body; and

[0021] It includes a controller that controls the overall operation of the battery pack case; and

[0022] The present invention provides a battery pack case characterized by increasing the surface area due to a corrugated shape formed on the outer surface of the case body, thereby facilitating the transfer of heat generated by the battery cell to the outside.

[0023] In addition, the present invention comprises a load cell coupled to both sides of the case body to which the cover is coupled, which measures the fastening load when the cover is fastened and transmits it to the controller;

[0024] It includes a warning lamp coupled to one side of the above-mentioned case body and emitting light according to the control of the above-mentioned controller;

[0025] The above controller is characterized by transmitting a control signal to the warning lamp so that the warning lamp lights up when the fastening load transmitted by the load cell is smaller than a preset load.

[0026] In addition, the present invention comprises a temperature sensor coupled to one side inside the case body to measure the temperature and transmit it to the controller;

[0027] It includes a pressure sensor coupled to one side inside the case body to measure pressure and transmit it to the controller;

[0028] The above controller is characterized by transmitting a warning signal to an administrator when the pressure or temperature transmitted from the temperature sensor and the pressure sensor is higher than a preset pressure value or temperature value.

[0029] In addition, the present invention comprises a rubber plug formed in the shape of a pipe having a conical flow path formed inside, which is inserted into a through hole formed in the side wall of the case body.

[0030] The above rubber plug is characterized by being fitted in a press-fit manner when inserted into the through hole, thereby closing the conical flow path, and opening the closed conical flow path to discharge high-pressure air to the outside when the internal pressure of the case body exceeds a preset reference pressure.

[0031] In addition, the present invention is characterized in that a protruding step is formed on the side of the rubber plug facing the interior of the case body, and a concave step is formed in the through hole to engage with the protruding step.

[0032] In addition, the present invention is characterized in that the degree of external interference fit of the case body in the rubber plug is greater than the degree of internal interference fit of the case body, so that when the rubber plug is inserted into the through hole, the external side of the conical flow path is closed and the internal side forms a conical shape.

[0033] In addition, the present invention further comprises a heating ring that is fitted circumferentially on the outer surface of the case body on the outer side of the rubber plug.

[0034] The above controller is characterized by allowing electricity to flow through the heating ring when the pressure or temperature transmitted from the temperature sensor and the pressure sensor is greater than a preset pressure value or temperature value, thereby opening the conical flow path of the rubber plug and allowing the air inside the case to be discharged to the outside. Effects of the invention

[0036] When abnormal temperature and pressure are formed inside the battery pack case according to the present invention, it has the effect of warning the manager of danger so that a prompt response is possible.

[0037] In addition, the present invention has the effect of ensuring safety by relieving abnormal temperature and pressure formed inside the battery pack case.

[0038] In addition, the present invention has the effect of maintaining airtightness by illuminating a warning lamp when the fastening load of the battery pack case cover is low.

[0039] In addition to the effects described above, the specific effects of the present invention are described together with the specific details for implementing the invention below. Brief explanation of the drawing

[0041] FIG. 1 is a perspective view of a battery pack case according to the present invention. FIG. 2 is an exploded view of a battery pack case according to the present invention. FIG. 3 is a cross-sectional view of the upper side of a battery pack according to the present invention. FIG. 4 is a diagram illustrating the operation of a rubber plug according to the present invention. Specific details for implementing the invention

[0042] Hereinafter, various embodiments of this document are described with reference to the accompanying drawings. However, this is not intended to limit the technology described in this document to specific embodiments and should be understood to include various modifications, equivalents, and / or alternatives to the embodiments of this document. In relation to the description of the drawings, similar reference numerals may be used for similar components.

[0043] Furthermore, expressions such as "First," "Second," etc., used in this document may modify various components regardless of order and / or importance, and are used merely to distinguish one component from another without limiting such components. For example, "Part 1" and "Part 2" may refer to different parts regardless of order or importance. For instance, without departing from the scope of rights described in this document, Part 1 may be named Part 2, and similarly, Part 2 may be renamed Part 1.

[0044] Furthermore, the terms used in this document are used merely to describe specific embodiments and are not intended to limit the scope of other embodiments. Singular expressions may include plural expressions unless the context clearly indicates otherwise. Terms used herein, including technical or scientific terms, may have the same meaning as generally understood by those skilled in the art described in this document. Terms used in this document that are defined in general dictionaries may be interpreted as having the same or similar meaning as they have in the context of the relevant technology, and are not to be interpreted in an ideal or overly formal sense unless explicitly defined in this document. In some cases, even terms defined in this document may not be interpreted to exclude the embodiments of this document.

[0045] FIG. 1 is a perspective view of a battery pack case (1000) according to the present invention, and FIG. 2 is an exploded view of a battery pack case (1000) according to the present invention.

[0046] This will be explained with reference to Figs. 1 and 2.

[0047] A battery pack case (1000) according to the present invention comprises a case body (100), a pair of covers (200), and a controller.

[0048] The case body (100) is formed in a pipe shape and accommodates a battery cell assembly in the internal space.

[0049] A supporting rib (110) is formed on the inner side of the case body (100) to support the battery cell assembly so that it does not shake.

[0050] Since a lot of heat is generated in the battery cell, the case body (100) must be able to quickly transfer the heat generated in the battery cell to the outside.

[0051] To this end, the case body (100) is made of aluminum with high thermal conductivity.

[0052] In addition, the outer surface of the case body (100) is formed in a corrugated shape to increase the surface area, thereby allowing heat generated by the battery cell to be easily transferred to the outside.

[0053] A controller (not shown in the drawing) is configured to control the overall operation of the battery pack case (1000).

[0054] Since the battery pack case (1000) must be kept airtight, it is necessary to warn if the cover (200) is not properly fastened to the case body (100).

[0055] Accordingly, the present invention is equipped with a load cell (120) and a warning lamp (not shown in the drawing).

[0056] A load cell (120) is attached to both sides of a case body (100) to which a cover (200) is attached, and measures the fastening load when the cover (200) is fastened and transmits it to a controller (not shown in the drawing).

[0057] A warning lamp (not shown in the drawing) is coupled to one side of the case body (100) and emits light according to the control of the controller.

[0058] The controller transmits a control signal to the warning lamp so that the warning lamp lights up when the fastening load transmitted by the load cell (120) is smaller than the preset load.

[0059] Meanwhile, if the temperature of the battery cell rises excessively, the air pressure inside the case also increases, and the air temperature rises as well.

[0060] In the present invention, a temperature sensor (not shown in the drawing) and a pressure sensor (not shown in the drawing) are provided to warn of abnormal temperature and pressure occurring inside the case.

[0061] A temperature sensor is coupled to one side inside the case body (100) to measure the temperature and transmit it to a controller.

[0062] The pressure sensor is coupled to one side inside the case body (100) to measure pressure and transmit it to the controller.

[0063] The controller sends a warning signal to the administrator if the pressure or temperature transmitted from the temperature sensor and the pressure sensor is higher than the preset pressure or temperature value.

[0064] As a result, safety measures can be taken by promptly warning the manager when the battery cell overheats.

[0065] In addition, the present invention is provided with a rubber plug (130) to discharge high-temperature, high-pressure air generated inside the case body (100) when the battery cell overheats.

[0066] FIG. 3 is a cross-sectional view of the upper side of a battery pack according to the present invention, and FIG. 4 is a drawing explaining the operation of a rubber plug (130) according to the present invention.

[0067] This will be explained with reference to Figs. 3 and 4.

[0068] As shown in FIG. 4(a), the rubber plug (130) is formed in the shape of a pipe with a conical flow path (131) formed inside.

[0069] The rubber plug (130) is inserted into a through hole formed in the side wall of the case body (100).

[0070] When the rubber plug (130) is inserted into the through hole, it is fitted in a force fit manner, and the conical flow path (131) in the outer direction is closed. However, when the internal pressure of the case body (100) exceeds a preset reference pressure, the closed conical flow path (131) is opened to discharge high-pressure air to the outside.

[0071] A protruding step is formed on the rubber plug (130) facing the interior of the case body (100). And a concave step is formed in the through hole of the case body (100) to engage with the protruding step.

[0072] Since such a step is formed on the rubber plug (130), the step is pressed by the pressure formed inside the case body (100), and the rubber plug (130) is firmly coupled to the through hole of the case body (100).

[0073] Meanwhile, the degree of external interference fit of the case body (100) in the rubber plug (130) is designed to be greater than the degree of internal interference fit of the case body (100).

[0074] This is to ensure that when the rubber plug (130) is inserted into the through hole, the outer side of the conical flow path (131) is closed and the inner side forms a conical shape, thereby increasing the inner surface area of ​​the rubber plug (130) exposed to pressure so that the conical flow path (131) can be smoothly opened when abnormal high pressure is formed.

[0075] FIG. 4(b) illustrates a state in which the outer side of the flow path of the rubber plug (130) is closed and the inner side is open when normal pressure is applied, and FIG. 4(c) illustrates a state in which the outer side of the flow path is opened when pressure is applied to the surface of the inner side of the flow path when abnormal pressure is applied.

[0076] In this way, the rubber plug (130) normalizes the pressure by releasing high-pressure air when abnormal high pressure is formed.

[0077] In addition, the present invention is provided with a heating ring (133) to forcibly open the flow path of the rubber plug (130) when the temperature and pressure rise rapidly.

[0078] The heating ring (133) is fitted circumferentially onto the outer surface of the case body (100) from the rubber plug (130).

[0079] When the pressure or temperature transmitted from the temperature sensor and the pressure sensor is greater than the preset pressure or temperature value, the controller causes electricity to flow to the heating ring (133) to melt the rubber. As a result, the conical flow path (131) of the rubber plug (130) is opened, allowing the air inside the case to be discharged to the outside.

[0080] The present invention relates to a battery pack case (1000), and more specifically, to a battery pack case (1000) in which a temperature sensor and a pressure sensor are provided on the inside of the case body (100) to transmit a warning signal to an administrator when the pressure or temperature inside the case body (100) is higher than a preset pressure value or temperature value, and a load cell (120) is mounted on both sides of the case body (100) so that a warning lamp is illuminated when the fastening load measured by the load cell (120) is less than a preset load, and a rubber plug (130) having a conical flow path (131) formed inside is inserted into a through hole formed in the case body (100) so that when the pressure inside the case body (100) reaches a pressure greater than a preset pressure, the conical flow path (131) opens to discharge high-pressure air to the outside.

[0082] Although preferred embodiments of the present invention have been illustrated and described above, the present invention is not limited to the specific embodiments described above. It is understood that various modifications can be made by those skilled in the art without departing from the essence of the invention as claimed in the claims, and such modified embodiments should not be understood individually from the technical spirit or perspective of the present invention. Explanation of the symbols

[0084] 1000 : Battery pack case 100 : Case body 110 : Support rib 120: Load cell 130 : Rubber plug 131 : Conical Euro 133 : Heating ring 200 : Cover

Claims

Claim 1 A battery pack case (1000) into which a battery cell assembly is inserted, comprising: a case body (100) formed in a pipe shape to accommodate the battery cell assembly in an internal space, having a supporting rib (110) formed on an inner surface and a corrugated shape formed on an outer surface; and a pair of covers (200) coupled to openings on both sides of the case body (100). A battery pack case comprising: a controller housed inside a battery pack case (1000); wherein the surface area is increased by a corrugated shape formed on the outer surface of the case body (100) to facilitate the transfer of heat generated by the battery cell to the outside; a load cell (120) coupled to both sides of the case body (100) to which the cover (200) is coupled, which measures the fastening load when the cover (200) is fastened and transmits it to the controller; and a warning lamp coupled to one side of the case body (100) which emits light according to the control of the controller; wherein the controller transmits a control signal to the warning lamp so that the warning lamp lights up when the fastening load transmitted by the load cell (120) is smaller than a preset load. Claim 2 delete Claim 3 A battery pack case according to claim 1, comprising: a temperature sensor coupled to one side inside the case body (100) to measure temperature and transmit it to the controller; and a pressure sensor coupled to one side inside the case body (100) to measure pressure and transmit it to the controller, wherein the controller transmits a warning signal to an administrator when the pressure or temperature transmitted from the temperature sensor and the pressure sensor is higher than a preset pressure value or temperature value. Claim 4 In claim 3, the battery pack case comprises: a rubber plug (130) formed in a pipe shape having a conical flow path (131) formed inside, which is inserted into a through hole formed in the side wall of the case body (100); wherein the rubber plug (130) is fitted in a press-fit manner when inserted into the through hole so that the conical flow path (131) is closed, and when the internal pressure of the case body (100) exceeds a preset reference pressure, the closed conical flow path (131) is opened to discharge high-pressure air to the outside. Claim 5 In claim 4, the battery pack case is characterized in that a protruding step is formed on the side of the rubber plug (130) facing the interior of the case body (100), and a concave step is formed in the through hole to engage with the protruding step. Claim 6 In claim 4, the degree of external interference fit of the case body (100) in the rubber plug (130) is greater than the degree of internal interference fit of the case body (100), so that when the rubber plug (130) is inserted into the through hole, the outer side of the conical flow path (131) is closed and the inner side forms a conical shape, characterized in that the battery pack case Claim 7 In claim 4, the battery pack case further comprises a heating ring (133) fitted circumferentially on the outer surface of the outer side of the case body (100) from the rubber plug (130); wherein the controller causes electricity to flow to the heating ring (133) when the pressure or temperature transmitted from the temperature sensor and the pressure sensor is greater than a preset pressure value or temperature value, thereby opening the conical flow path (131) of the rubber plug (130) so that air inside the case is discharged to the outside.

Images