Battery Pack

Abstract

A battery pack of the present invention includes a battery cell and a measurement substrate for obtaining status information of the battery cell, the measurement substrate being arranged to overlap with a first surface of the battery cell and provided with a measurement terminal, the measurement terminal being conductively connected to the first surface of the battery cell. According to the present invention, a battery pack is provided in which a measurement structure for collecting status information such as voltage or temperature of a battery cell is improved, thereby reducing manufacturing costs.

Description

Technical Field

[0001] The present disclosure relates to a battery pack. Background Art

[0002] In general, a secondary battery refers to a battery that can be repeatedly charged and recharged, unlike a non-rechargeable primary battery. Secondary batteries are used as energy sources for devices such as mobile devices, electric vehicles, hybrid vehicles, electric bicycles, or uninterruptible power supplies. Depending on the type of external device using the secondary battery, the secondary battery is used alone, or a secondary battery module is used, each of which includes a plurality of secondary batteries connected as a unit.

[0003] Unlike small mobile devices such as cellular phones that can operate for a certain period of time using a single battery, devices such as electric vehicles or hybrid vehicles that have a long operating time and consume a large amount of electricity may prefer battery modules (battery packs) that each include multiple batteries to deal with issues related to power and capacity, and the output voltage or current of the battery module can be increased by adjusting the number of batteries included in each battery module. Summary of the invention

[0004] Technical issues

[0005] An embodiment of the present disclosure includes a battery pack in which a structure for collecting status information such as battery cell voltage and temperature is improved to reduce the manufacturing cost of the battery pack.

[0006] Technical Solution

[0007] In order to solve the above problems and other problems, a battery pack disclosed herein includes:

[0008] battery cells; and

[0009] The measuring board is configured to obtain status information of the battery cell, and includes a measuring terminal arranged on a first surface of the battery cell and conductively connected to the first surface of the battery cell.

[0010] For example, the measurement terminal may be in contact with the first surface of the battery cell and may be electrically connected to the first surface of the battery cell.

[0011] For example, the electrode terminal may be formed on a first surface of the battery cell.

[0012] For example, the electrode terminals may include a first electrode terminal and a second electrode terminal having opposite polarities, and

[0013] The first surface of the battery cell may be electrically connected to the first electrode terminal.

[0014] For example, the battery cell may include a plurality of battery cells arranged in an array.

[0015] The measurement board may further include a body extending along the array of the plurality of battery cells, and

[0016] The measuring terminal may include a plurality of measuring terminals branched from a main body of the measuring board toward different battery cells and spaced apart from each other.

[0017] For example, the plurality of measurement terminals may branch side by side from the main body of the measurement board in the same direction.

[0018] For example, there may be fewer measurement terminals than the plurality of battery cells.

[0019] For example, battery cells arranged adjacent to each other in the array of the plurality of battery cells may be connected in parallel to each other to form a parallel module, and

[0020] Each measurement terminal may be conductively connected to the first surface of any one battery cell of each parallel-connected module.

[0021] For example, the battery cell may include a plurality of battery cells arranged in an array, and

[0022] The battery pack may further include a bus bar electrically connecting the plurality of battery cells to each other.

[0023] For example, the bus bar may electrically connect battery cells that are not adjacent to each other in the array of the plurality of battery cells.

[0024] For example, opposite polarities of battery cells that are not adjacent to each other in the array of the plurality of battery cells may be connected in series to each other through a bus bar.

[0025] For example, an insulating busbar holder can be arranged between the busbar and the measuring plate.

[0026] For example, the measurement board and the bus bar support may be sequentially arranged above the first surface of the plurality of battery cells, and

[0027] A coupling hole may be formed through the bus bar holder such that a coupling tool is allowed to access to conductively connect the measurement terminals of the measurement board to the first surfaces of the plurality of battery cells.

[0028] For example, the coupling hole may correspond to a coupling position between the measuring terminal and the first surfaces of the plurality of battery cells.

[0029] For example, the bus bar may include a plurality of bus bars, and

[0030] The measurement board may further include a connection terminal branched from a main body of the measurement board and electrically connected to a first bus bar among the plurality of bus bars.

[0031] For example, the first bus bar may be electrically connected to a first battery cell having a lowest negative electrode voltage in the array of the plurality of battery cells.

[0032] For example, the first bus bar may be connected to an output terminal of the battery pack.

[0033] For example, an insulating busbar support may be arranged between the first busbar and the measuring plate, and

[0034] A through hole may be formed through the bus bar holder to allow the connection terminal to pass through the through hole.

[0035] For example, the connection terminals may include:

[0036] an extension portion bent from the main body of the measurement board and extending toward the first bus bar; and

[0037] The terminal portion is bent from the extension portion and connected to the first bus bar.

[0038] For example, the connection terminals and the measurement terminals may branch from the main body of the measurement board toward different battery cells and may be spaced apart from each other along the main body of the measurement board.

[0039] The connection terminals and the body of the measuring board can be arranged at different heights, and

[0040] The measuring terminals may be arranged flush with the body of the measuring board.

[0041] For example, the connection terminals and the measurement terminals may branch off from the main body of the measurement board side by side in the same direction.

[0042] Beneficial Effects

[0043] According to the present disclosure, a battery pack has an improved structure for collecting status information such as battery cell voltage and temperature, so that the manufacturing cost of the battery pack can be reduced. According to one embodiment of the present disclosure, the width of a measurement board configured to collect status information of a battery pack is reduced, thereby saving raw materials of the measurement board. In addition, the status information is measured directly from the first surface of the battery cell, so that it is not necessary to form an additional connection structure on the bus bar that electrically connects the battery cells to each other, thereby simplifying the structure of the bus bar and making it possible to eliminate a complicated formation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 is a perspective view showing a battery pack according to an embodiment of the present disclosure.

[0045] Figure 2It is shown Figure 1 An exploded perspective view of the battery pack is shown.

[0046] Figure 3 is shown in more detail Figure 1 The battery cell shown is a view for explaining the structure of the battery cell.

[0047] Figure 4 It is shown Figure 2 An enlarged perspective view of the connection of the measuring plate is shown.

[0048] Figure 5 It is shown Figure 2 The battery pack shown is a view for explaining the connection of the measuring board.

[0049] Figure 6 is with Figure 2 A portion of the corresponding Figure 2 A perspective view of the electrical connections of multiple battery cells is shown.

[0050] Figure 7 is a perspective view showing a battery pack according to a comparative example for comparison with the present disclosure.

[0051] Figure 8 It is shown Figure 7 A view of the connection of the measuring plate is shown. DETAILED DESCRIPTION

[0052] Best Mode for Carrying Out the Invention

[0053] A battery pack of the present disclosure comprises:

[0054] battery cells; and

[0055] The measuring board is configured to obtain status information of the battery cell, and includes a measuring terminal arranged on a first surface of the battery cell and conductively connected to the first surface of the battery cell.

[0056] Embodiments of the present disclosure

[0057] Hereinafter, a battery pack will be described according to preferred embodiments of the present disclosure with reference to the accompanying drawings.

[0058] Figure 1 is a perspective view showing a battery pack according to an embodiment of the present disclosure. Figure 2 It is shown Figure 1 An exploded perspective view of the battery pack is shown. Figure 3 is shown in more detail Figure 1 The battery cell shown is a view for explaining the structure of the battery cell.

[0059] Reference Figure 1 and Figure 2 The battery pack of the present disclosure includes: a plurality of battery cells 10; a bus bar 200 configured to electrically connect the plurality of battery cells 10 to each other; a measuring board 100 configured to measure status information from the plurality of battery cells 10, such as voltage or temperature; and a bus bar bracket 150, providing electrical insulation between the bus bar 200 and the measuring board 100.

[0060] Reference Figure 3 Each battery cell 10 may include: an electrode assembly 15 having a first electrode plate 15a and a second electrode plate 15b and a separator 15c arranged between the first electrode plate 15a and the second electrode plate 15b; a can 18 having an open end to accommodate the electrode assembly 15; and a cover plate 19 connected to the can 18 for sealing the open end of the can 18 in which the electrode assembly 15 is accommodated.

[0061] The first and second electrode terminals 11 and 12 electrically connected to the first and second electrode plates 15a and 15b may be formed on the cap plate 19. The first and second electrode terminals 11 and 12 may be coupled to the cap plate 19, wherein one of the first and second electrode terminals 11 and 12, for example, the first electrode terminal 11, may form a conductive connection with the cap plate 19, and the second electrode terminal 12 may form an insulating connection with the cap plate 19.

[0062] The first electrode terminal 11 may be in direct contact with the cap plate 19 to form a conductive connection with the cap plate 19, in which case the same voltage may be applied to the cap plate 19 and the first electrode terminal 11. In addition, the cap plate 19 conductively connected to the first electrode terminal 11 may have the same temperature as the interior of the battery cell 10 because the first electrode terminal 11 is connected to the electrode assembly 15 accommodated in the battery cell 10.

[0063] The cover plate 19 may form a first surface 10a of the battery cell 10 on which the electrode terminals 11 and 12 are formed, and state information of the battery cell 10, such as voltage and temperature, may be obtained from the cover plate 19 having the same voltage as the first electrode terminal 11 and the same temperature as the interior of the battery cell 10, i.e., the first surface 10a of the battery cell 10.

[0064] In one embodiment of the present disclosure, although the first electrode terminal 11 and the second electrode terminal 12 may be formed on the first surface 10a of the battery cell 10, the role of the first electrode terminal 11 may be replaced by the cap plate 19 because the cap plate 19 has the same voltage as the first electrode terminal 11. In this case, the first electrode terminal 11 may not be formed on the cap plate 19, and the cap plate 19 may replace the function of the first electrode terminal 11 and may have the voltage of the battery cell 10.

[0065] The second electrode terminal 12 may be coupled to the cap plate 19 via an insulating gasket 13 between the second electrode terminal 12 and the cap plate 19, and thus insulation between the cap plate 19 and the second electrode terminal 12 may be maintained. The insulating gasket 13 may be disposed between the cap plate 19 and the second electrode terminal 12 for insulation between the cap plate 19 and the second electrode terminal 12.

[0066] Reference Figure 3 , the first electrode terminal 11 and the second electrode terminal 12 may respectively include: terminal rivets 11a and 12a, which are inserted through the cover plate 19; and terminal plates 11b and 12b, which are compressively coupled to the upper ends of the terminal rivets 11a and 12a, wherein lead members 16 and 17 may be provided between the electrode assembly 15 and the terminal rivets 11a and 12a for electrical connection therebetween.

[0067] Reference Figure 2 The measurement board 100 can be used to measure state information of the battery cell 10, such as voltage or temperature, directly from the side of the battery cell 10, for example, the first surface 10a of the battery cell 10. Here, the expression "the measurement board 100 measures state information, such as voltage or temperature, directly from the first surface 10a of the battery cell 10" means that the measurement board 100 is electrically connected to the first surface 10a of the battery cell 10 and directly obtains a voltage signal from the first surface 10a of the battery cell 10, or is thermally connected to the first surface 10a of the battery cell 10 and directly obtains a temperature signal from the first surface 10a of the battery cell 10.

[0068] In one embodiment of the present disclosure, the measurement board 100 may be electrically connected to the first surface 10a of the battery cell 10 to obtain voltage information from the battery cell 10 by measuring the voltage of the first surface 10a of the battery cell 10. For example, a voltage of one of the first electrode terminal 11 and the second electrode terminal 12 having opposite polarities may be applied to the first surface 10a of each battery cell 10, for example, a voltage of the first electrode terminal 11 of each battery cell 10 may be applied to the first surface 10a of the battery cell 10. More specifically, the first surface 10a of the battery cell 10 may be electrically connected to the first electrode terminal 11 of the battery cell 10.

[0069] The bus bar holder 150 may be arranged between the measurement board 100 and the bus bar 200 to provide insulation therebetween. In addition, the bus bar holder 150 may provide insulation between the first surface 10a of the battery cell 10 and the bus bar 200. That is, as described later, the bus bar holder 150 may be arranged between each bus bar 200 and each of the first surface 10a of the battery cell 10 and the measurement board 100 (or the measurement terminal 100b) that are in electrical contact with each other, thereby providing insulation between the bus bar 200 and the first surface 10a of the battery cell 10 and between the measurement board 100 and the bus bar 200.

[0070] The measurement board 100 may form a low current path through which a voltage signal measured from the first surface 10a of the battery cell 10 is transmitted, and the bus bar 200 may form a high current path through which a charge-discharge current of the battery cell 10 flows. In addition, an insulating bus bar support 150 may be disposed between the measurement board 100 forming the low current path and the bus bar 200 forming the high current path to provide insulation therebetween.

[0071] The bus bar holder 150 may provide insulation between the first surface 10a of the battery cell 10 and the bus bar 200, and may include a terminal hole 150' formed therethrough so that the bus bar 200 may be coupled to the first electrode terminal 11 and the second electrode terminal 12 formed on the first surface 10a of the battery cell 10. Position alignment ribs R for aligning the assembly position of the bus bar 200 may be formed around the terminal hole 150' of the bus bar holder 150.

[0072] Figure 4 It is shown Figure 2 An enlarged perspective view of the connection of the measuring plate is shown. Figure 5 It is shown Figure 2 The battery pack shown is a view for explaining the connection of the measuring board.

[0073] Reference Figure 2 and Figure 4 The measurement board 100 may be conductively connected to the plurality of battery cells 10 , and may directly acquire voltage information or temperature information from the first surfaces 10 a of the plurality of battery cells 10 through conductive connection with the first surfaces 10 a of the plurality of battery cells 10 .

[0074] The measurement board 100 may include a main body 100 a extending across the array of battery cells 10 , and a plurality of measurement terminals 100 b branching from the main body 100 a toward different battery cells 10 and spaced apart from each other.

[0075] The measuring terminals 100b may be branched side by side in the same direction from the main body 100a of the measuring board 100 toward the first surfaces 10a of different battery cells 10. For example, a plurality of measuring terminals 100b may all be formed on one of the left and right sides of the main body 100a of the measuring board 100, but may not be distributed on both the left and right sides of the main body 100a of the measuring board 100. Here, the left and right direction may refer to the direction in which the first electrode terminal 11 and the second electrode terminal 12 of the battery cell 10 are connected. The measuring terminal 100b is part of the measuring board 100, and the branching direction of the measuring terminal 100b branching from the measuring board 100 may affect the left and right width of the measuring board 100.

[0076] In one embodiment of the present disclosure, the branching direction of the plurality of measurement terminals 100b may be one of the left direction and the right direction, so that the left-right width W of the measurement board 100 may be reduced to save the raw material of the measurement board 100. When the branching direction of the plurality of measurement terminals 100b is both the left direction and the right direction, the left-right width W of the measurement board 100 increases, and a higher cost for forming the measurement board 100 may be brought about.

[0077] The measuring board 100 may include a conductive pattern 100m and an insulating layer, the conductive pattern 100m being buried in the insulating layer to be electrically insulated from the surrounding environment. For example, the measuring board 100 may be a flexible board having flexibility, such as a film. The measuring terminal 100b may form a conductive connection with the battery cell 10, for which the measuring terminal 100b may be formed by a portion of the conductive pattern 100m exposed from the insulating layer. The conductive pattern 100m may extend continuously across the measuring terminal 100b and the main body 100a of the measuring board 100, and the conductive pattern 100m exposed at the measuring terminal 100b may be surrounded by an insulating layer while extending in the main body 100a of the measuring board 100, so that the conductive pattern 100m may be insulated from the battery cell 10. For example, high-temperature thermal connection such as welding or soldering can be performed between the lower side of the measuring terminal 100b and the first surface 10a of the battery cell 10 by introducing a connecting tool (not shown) such as a welding tool or a soldering tool therein from the upper side of the measuring terminal 100b, and for this purpose, the measuring terminal 100b can be formed by a portion of the conductive pattern 100m exposed from the insulating layer.

[0078] Although not in Figure 2 and Figure 4 , but the voltage signal of the battery cell 10 may be transmitted from the measurement terminal 100b to a connector (not shown) connected to one end of the measurement board 100 through the main body 100a of the measurement board 100, and then may be transmitted from the connector to a battery management system (not shown). The battery management system (not shown) may control the charge-discharge operation of the battery cell 10 based on the voltage signal or temperature signal obtained through the measurement board 100.

[0079] The measuring terminal 100b of the measuring board 100 may form a conductive connection with the first surface 10a of the battery cell 10. That is, the measuring terminal 100b may be directed to directly face the first surface 10a of the battery cell 10, and may be placed on the first surface 10a of the battery cell 10 to form a conductive connection with the first surface 10a. Here, the expression "the measuring terminal 100b directly faces the first surface 10a of the battery cell 10" may mean that the measuring terminal 100b directly faces the first surface 10a of the battery cell 10 without any other elements being arranged between the measuring terminal 100b and the first surface 10a of the battery cell 10. For example, the measuring terminal 100b may be in direct contact with the first surface 10a of the battery cell 10, and may be directly connected to the first surface 10a of the battery cell 10.

[0080] Refer to Figure 2 , Figure 4 and Figure 5 , the measuring terminal 100b may be conductively connected to the first surface 10a of the battery cell 10 by high temperature thermal coupling such as welding or soldering. The process of conductively connecting the measuring terminal 100b to the first surface 10a of the battery cell 10 may be performed by a coupling hole CH formed through the bus bar holder 150. That is, the bus bar holder 150 may be arranged on the measuring board 100 including the measuring terminal 100b, in which case the bus bar holder 150 may have a coupling hole CH that allows a conductive connection process between the measuring terminal 100b and the first surface 10a of the battery cell 10. The coupling hole CH may allow a coupling tool (not shown) such as a welding tool or a soldering tool to approach the measuring terminal 100b, and thus the measuring terminal 100b may be coupled to the first surface 10a of the battery cell 10. The coupling hole CH may correspond to a position of coupling (i.e., welding or soldering) between the measuring terminal 100b and the first surface 10a of the battery cell 10.

[0081] The measuring board 100 can be in close contact with the first surface 10a of the battery cell 10 to form a conductive connection, i.e., conductive contact, with the first surface 10a of the battery cell 10. To this end, the busbar support 150 can push the measuring board 100 against the first surface 10a of the battery cell 10 so that the measuring board 100 can be in close contact with the first surface 10a of the battery cell 10. Figure 2 and Figure 4 , but the bus bar bracket 150 can be connected to a side plate (not shown) extending across the side of the battery cell 10, so that the measurement board 100 arranged below the bus bar bracket 150 can be pushed against the first surface 10a of the battery cell 10 by the bus bar bracket 150.

[0082] Figure 6 is with Figure 2A portion of the corresponding Figure 2 A perspective view of the electrical connections of multiple battery cells is shown.

[0083] Reference Figure 2 and Figure 6 The bus bar 200 may be disposed on the bus bar support 150 for electrically connecting the plurality of battery cells 10 to each other. The bus bar 200 may electrically connect the plurality of battery cells 10 to each other and may form a current path through which a charge-discharge current flows.

[0084] In one embodiment of the present disclosure, the bus bar 200 can electrically connect the battery cells 10 that are not adjacent to each other, so the output terminals 501 and 502 for outputting the voltage of the battery pack can be all provided on one side of the battery pack. That is, in one embodiment of the present disclosure, the output terminals 501 and 502 of the battery pack, that is, the first output terminal 501 and the second output terminal 502, can be not separately formed on one side and the other side of the battery pack, but can be all formed on one side of the battery pack.

[0085] More specifically, the bus bar 200 can connect a pair of adjacent battery cells 10 in parallel with each other by connecting the same polarities of the pair of adjacent battery cells 10, and the pair of adjacent battery cells 10 connected in parallel with each other can form a parallel module PM. In one embodiment of the present disclosure, the parallel module PM can be formed by connecting a pair of adjacent battery cells 10 in parallel with each other, and in another embodiment of the present disclosure, the parallel module PM can be formed by connecting three or more adjacent battery cells 10 in parallel with each other.

[0086] A pair of battery cells 10 (parallel modules PM) connected in parallel to each other may be connected in series to another pair of battery cells 10 (another parallel module PM) connected in parallel to each other through a bus bar. In this case, the pair of battery cells 10 (parallel modules PM) electrically connected to each other (in series) through the bus bar 200 and the other pair of battery cells 10 (another parallel module PM) connected in parallel may not be adjacent to each other. As described above, the battery cells 10 that are not adjacent to each other, i.e., the parallel modules PM that are not adjacent to each other, are connected in series to each other, so that the first output terminal 501 and the second output terminal 502 of the battery pack may all be formed on one side of the battery pack.

[0087] Each bus bar 200 may include: a branch portion 200a configured to connect a pair of adjacent battery cells 10 (parallel modules PM) in parallel with each other; another branch portion 200a configured to connect another pair of adjacent battery cells 10 (another parallel module PM) in parallel with each other; and a connection portion 200c connecting the branch portions 200a to connect the pair of adjacent battery cells 10 (parallel modules PM) in series to the other pair of adjacent battery cells 10 (another parallel module PM). The pair of adjacent battery cells 10 (parallel modules PM) to be connected by the connection portion 200c and the other pair of adjacent battery cells 10 (another parallel module PM) may be arranged at positions that are not adjacent to each other.

[0088] The measuring terminal 100b branches from the main body 100a of the measuring board 100 toward different battery cells 10 of the array of battery cells 10 to collect status information from different battery cells 10. The measuring terminal 100b may be formed at some positions so that each measuring terminal 100b may be conductively connected to one of a pair of battery cells 10 (parallel modules PM) connected in parallel. That is, since a pair of battery cells 10 (parallel modules PM) connected in parallel share the same voltage, it is not necessary to connect the measuring terminal 100b to the parallel-connected battery cells 10 forming the parallel modules PM, respectively, and thus the measuring terminal 100b may be connected to only one battery cell 10 of the pair of battery cells 10 (parallel modules PM) connected in parallel to simplify the structure of the measuring board 100 and reduce the manufacturing cost. Therefore, the number of measuring terminals 100b branching from the main body 100a of the measuring board 100 may be reduced.

[0089] In one embodiment of the present disclosure, the number of measuring terminals 100b may be less than the total number of battery cells 10 (the number of measuring terminals 100b < the number of battery cells 10), and the number of measuring terminals 100b may be adjusted to obtain a configuration in which one measuring terminal 100b corresponds to one voltage, rather than obtaining a configuration in which the measuring terminals 100b respectively correspond to different battery cells 10 sharing the same voltage.

[0090] A plurality of bus bars 200 may be provided along the array of battery cells 10 to electrically connect the battery cells 10. In this case, the measurement board 100 may include a connection terminal 100c electrically connected to a first bus bar 201 of the plurality of bus bars 200. That is, the connection terminal 100c is conductively connected to the first bus bar 201, rather than being conductively connected to the first surface 10a of the battery cell 10. The connection terminal 100c may not be in contact with the first surface 10a of the battery cell 10, but may be in direct contact with the first bus bar 201.

[0091] In one embodiment of the present disclosure, a connection terminal 100c for measuring the lowest negative electrode voltage (hereinafter referred to as the lowest negative electrode voltage) among the voltages of the plurality of battery cells 10 may be directly connected to the first bus bar 201 connected to the first battery cell C1. For example, the negative electrode of the first battery cell C1 forming the lowest negative electrode voltage, such as the second electrode terminal 12 of the first battery cell C1, may be connected to the first bus bar 201, and thus connected to the measurement board 100 through the connection terminal 100c conductively connected to the first bus bar 201. The first bus bar 201 to which the lowest negative electrode voltage is applied may be connected to the first output terminal 501 and the second output terminal 502 of the battery pack, such as to the second output terminal 502.

[0092] The connection terminal 100c of the measuring board 100 is connected to the first bus bar 201 connected to the first battery cell C1, and along with this, the measuring terminal 100b can be connected to the first surface 10a of the second battery cell C2 connected in parallel with the first battery cell C1 to form a parallel module PM. The first battery cell C1 and the second battery cell C2 sharing a voltage can form a parallel module PM, wherein the negative side voltage (the voltage of the second electrode terminal 12) of the parallel module PM is measured by the connection terminal 100c, and the positive side voltage (the voltage of the first electrode terminal 11) of the parallel module PM is measured by the measurement terminal 100b. That is, in the parallel module PM in the array of the battery cells 10, the connection terminal 100c and the measurement terminal 100b can be respectively connected to the first battery cell C1 and the second battery cell C2 forming the parallel module PM. More specifically, the connection terminal 100c can be connected to the first bus bar 201 connected to the first battery cell C1, and the measurement terminal 100b can be connected to the first surface 10a of the second battery cell C2.

[0093] The measuring board 100 may include a plurality of measuring terminals 100b in addition to the connecting terminal 100c, wherein the measuring terminal 100b may be conductively connected to the first surface 10a of the battery cell 10 to measure the positive electrode voltage (the voltage of the first electrode terminal 11), and the connecting terminal 100c may be conductively connected to the first bus bar 201 connected to the first battery cell C1 to measure the lowest negative electrode voltage.

[0094] The total voltage difference of the battery pack, i.e., the output voltage of the battery pack, can be calculated based on the lowest negative electrode voltage measured via the connection terminal 100c by adding the positive electrode voltages of the battery pack measured via the measurement terminal 100b. For example, the output voltage may correspond to the voltage between the first output terminal 501 and the second output terminal 502. The connection terminal 100c may be conductively connected to the first bus bar 201 connected to the first battery cell C1 having the lowest negative electrode voltage to calculate the output voltage of the battery pack.

[0095] Refer to Figure 4 and Figure 6 By bending the connection terminal 100c from the main body 100a of the measuring board 100, the connection terminal 100c can be formed in a form raised toward the first bus bar 201, wherein the connection terminal 100c may include: an extension portion 100c1, which is bent from the main body 100a of the measuring board 100 and extends upward; and a terminal portion 100c2, which is bent from the extension portion 100c1 and connected to the first bus bar 201.

[0096] The connection terminal 100c and the measurement terminal 100b may be branched from the main body 100a of the measurement board 100 toward different battery cells 10, and may be separated from each other along the main body 100a of the measurement board 100. In this case, the connection terminal 100c may be arranged at a height different from that of the main body 100a of the measurement board 100, and the measurement terminal 100b may be arranged at the same height as that of the main body 100a of the measurement board 100. That is, the connection terminal 100c bent to be elevated toward the first bus bar 201 may be different in shape from the measurement terminal 100b in that the measurement terminal 100b is arranged on the same plane as the main body 100a of the measurement board 100 and is conductively connected to the first surface 10a of the battery cell 10.

[0097] The connection terminal 100c and the measurement terminal 100b may be branched side by side in the same direction from the main body 100a of the measurement board 100. That is, all of the connection terminals 100c and the measurement terminals 100b may be formed on one of the left and right sides of the main body 100a of the measurement board 100, and the branching direction of the connection terminals 100c and the measurement terminals 100b may be one of the left and right directions. When the connection terminals 100c and the measurement terminals 100b are branched in both the left and right directions instead of in one of the left and right directions, the total left-right width W of the measurement board 100 including the connection terminals 100c and the measurement terminals 100b may be increased, and thus the cost of the raw materials of the measurement board 100 may be increased.

[0098] Refer to Figure 2 , Figure 5 and Figure 6 , the connection terminal 100c may be connected to the first bus bar 201 through the through hole TH of the bus bar holder 150. For example, the extension portion 100c1 of the connection terminal 100c may extend through the through hole TH of the bus bar holder 150 toward the first bus bar 201, and the connection terminal 100c and the first bus bar 201 may be coupled to each other through the terminal portion 100c2 connected to the first bus bar 201 in an overlapping manner.

[0099] The bus bar holder 150 may be disposed between the measurement board 100 and the first bus bar 201 , and the connection terminal 100 c extending from the body 100 a of the measurement board 100 through the through hole TH of the bus bar holder 150 may be connected to the first bus bar 201 .

[0100] The busbar support 150 may include a plurality of coupling holes CH in addition to the through hole TH. The through hole TH is used to allow the connection terminal 100c to pass therethrough and may correspond to the coupling position between the connection terminal 100c and the first busbar 201, while the coupling hole CH is used to allow a coupling tool (not shown) to approach the measuring terminal 100b to conductively connect the measuring terminal 100b to the first surface 10a of the battery cell 10 and may correspond to the coupling position between the measuring terminal 100b and the first surface 10a of the battery cell 10.

[0101] Reference Figure 4 Like the measuring terminal 100b, the connecting terminal 100c may be formed by a portion of the conductive pattern 100m exposed from the insulating layer, and the conductive pattern 100m exposed at the connecting terminal 100c may be surrounded by the insulating layer in a buried form while extending in the body 100a of the measuring board 100.

[0102] Figure 7 is a perspective view showing a battery pack according to a comparative example for comparison with the present disclosure. Figure 8 It is shown Figure 7 A view of the connection of the measuring plate is shown.

[0103] According to a comparative example for comparison with the present disclosure, a battery pack may include: a plurality of battery cells 1; a bus bar 20 configured to electrically connect the battery cells 1; and a measuring board 21 configured to be connected to the bus bar 20 for obtaining status information of the battery cells 1, such as voltage or temperature, wherein a bus bar bracket 50 may be arranged between the battery cells 1 and the bus bar 20 to provide insulation therebetween.

[0104] According to the comparative example for comparison with the present disclosure, information on the voltage of the battery cell 1 is obtained through the bus bar 20, and for this purpose, the measuring board 21 is connected to the bus bar 20. Therefore, the bus bar 20 needs to include an additional protruding portion 20c for connection with the measuring terminal 21b of the measuring board 21, and because the measuring terminal 21b branches from the measuring board 21 toward the bus bars 20 arranged on the left and right sides of the battery cell 10, it is necessary to increase the left-right width W' of the measuring board 21.

[0105] That is, according to the comparative example used for comparison with the present disclosure, the bus bar 20 needs to include the protrusion 20c for connecting with the measuring plate 21 (more specifically, the measuring terminal 21b), and thus the bus bar 20 has a complicated structure and brings about a high manufacturing cost for forming the protrusion 20c. For example, in order to form each bus bar 20 including the protrusion 20c formed integrally with the bus bar 20, it is necessary to cut off the portion other than the protrusion 20c from the raw material of the bus bar 20, thereby wasting a large amount of metal scraps, that is, wasting the raw material of the bus bar 20, and bringing about an additional processing cost for forming the bus bar 20. In addition, because the measuring terminal 21b of the measuring plate 21 needs to be connected to the bus bars 20 arranged on both the left and right sides, the left-right width W' of the measuring plate 21 increases, and thus the cost of the raw material of the measuring plate 21 increases. Here, the left-right direction may refer to the direction of connecting the first electrode terminal 1a and the second electrode terminal 1b of the battery cell 10. For example, in order to increase the left-right width W′ of the measurement plate 21 , it is necessary to cut away unnecessary portions from a relatively wide left-right raw material, and thus the raw material may be wasted.

[0106] like Figure 4 As shown, according to the present disclosure, the measuring terminal 100b of the measuring board 100 is not connected to the bus bar 200, but is directly connected to the first surface 10a of the battery cell 10, so the measuring terminal 100b can be branched side by side toward one of the left and right sides, rather than toward the left and right sides where the bus bar 200 is arranged. Therefore, according to the present disclosure, the left-right width W of the measuring board 100 can be reduced, and the cost of the raw materials of the measuring board 100 can be reduced. In addition, because Figure 2 As shown, the measuring terminal 100b is not connected to the bus bar 200, so there is no need to form a protruding portion on the bus bar 200 for connection with the measuring terminal 100b, and thus the bus bar 200 can have a smooth outer shape without such a protruding portion. In addition, after forming the bus bar 200, no additional part cost for removing a large amount of metal fragments is incurred, and the raw material of the bus bar 200 is not wasted due to a large amount of metal fragments. Quantitatively, the width W of the measuring plate 100 of the present disclosure can be reduced to about 75% of the width W' of the measuring plate 21 of the comparative example.

[0107] Although the embodiments of the present disclosure have been described with reference to the accompanying drawings, these embodiments are for illustrative purposes only, and those skilled in the art will appreciate that various modifications and other equivalent embodiments may be made therefrom.

[0108] Industrial Applicability

[0109] The present disclosure may be applied to battery packs as rechargeable energy sources.

Claims

1. A battery pack, comprising: A battery cell including a first surface on which an electrode terminal is formed; as well as A measurement board is configured to obtain status information of the battery cell, wherein the measurement board includes a measurement terminal, and the measurement terminal is directly arranged on the first surface of the battery cell to form a direct electrical contact with the first surface of the battery cell.

2. The battery pack according to claim 1, wherein The electrode terminals include a first electrode terminal and a second electrode terminal having opposite polarities, and The first surface of the battery cell is electrically connected to the first electrode terminal.

3. The battery pack according to claim 1, wherein The battery cell comprises a plurality of battery cells arranged in an array, The measurement board also includes a body extending along the array of the plurality of battery cells, and The measuring terminal includes a plurality of measuring terminals branched from the main body of the measuring board toward different battery cells and spaced apart from each other. 4 . The battery pack according to claim 3 , wherein the plurality of measurement terminals are branched side by side in the same direction from the main body of the measurement board. The battery pack according to claim 3 , wherein the measurement terminals are fewer than the plurality of battery cells.

6. The battery pack according to claim 5, wherein The battery cells arranged adjacent to each other in the array of the plurality of battery cells are connected in parallel to each other to form a parallel module, and Each of the measurement terminals is conductively connected to the first surface of any one battery cell of each of the parallel modules.

7. The battery pack according to claim 1, wherein The battery cell includes a plurality of battery cells arranged in an array, and The battery pack also includes a bus bar electrically connecting the plurality of battery cells to each other. 8 . The battery pack according to claim 7 , wherein the bus bar comprises a plurality of bus bars, some of the plurality of bus bars electrically connecting battery cells that are not adjacent to each other in the array of the plurality of battery cells. 9 . The battery pack according to claim 8 , wherein opposite polarities of the battery cells that are not adjacent to each other in the array of the plurality of battery cells are connected in series with each other by the some of the plurality of bus bars. 10 . The battery pack according to claim 7 , wherein an insulating bus bar support is arranged between the bus bar and the measurement board.

11. The battery pack according to claim 10, wherein The measurement board and the bus bar holder are sequentially arranged over the first surface of the plurality of battery cells, and A coupling hole is formed through the bus bar holder so that a coupling tool is allowed to access to conductively connect the measurement terminal of the measurement board to the first surface of the plurality of battery cells. 12 . The battery pack according to claim 11 , wherein the coupling hole corresponds to a coupling position between the measuring terminal and the first surfaces of the plurality of battery cells.

13. The battery pack according to claim 7, wherein The bus bar includes a plurality of bus bars, and The measurement board further includes a connection terminal branched from a main body of the measurement board and electrically connected to a first bus bar among the plurality of bus bars. 14 . The battery pack of claim 13 , wherein the first bus bar is electrically connected to a first battery cell having a lowest negative electrode voltage in the array of the plurality of battery cells. 15 . The battery pack according to claim 14 , wherein the first bus bar is connected to an output terminal of the battery pack.

16. The battery pack according to claim 13, wherein an insulating busbar support is arranged between the first busbar and the measuring board, and A through hole is formed through the bus bar holder to allow the connection terminal to pass through the through hole.

17. The battery pack according to claim 13, wherein the connection terminal comprises: an extension portion bent from the main body of the measurement board and extending toward the first bus bar; as well as A terminal portion is bent from the extending portion and connected to the first bus bar.

18. The battery pack according to claim 13, wherein The connection terminals and the measurement terminals branch from the main body of the measurement board toward different battery cells and are spaced apart from each other along the main body of the measurement board, The connection terminals and the main body of the measuring board are arranged at different heights, and The measurement terminal is arranged flush with the main body of the measurement board. 19 . The battery pack according to claim 13 , wherein the connection terminal and the measurement terminal branch side by side in the same direction from the main body of the measurement board.

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