BCMIS assembly and battery pack

Abstract

The utility model relates to the technical field of batteries, in particular to a BCMIS assembly and a battery pack which are used for being electrically connected with a battery module. The battery module comprises a plurality of battery cell assemblies stacked in the second direction, each battery cell assembly comprises a plurality of battery cells stacked in the first direction, the BCMIS assembly comprises a support body, a flexible circuit board, a battery management system and a guide connecting piece are integrated on the support body, the flexible circuit board is used for being connected with the battery management system, and the guide connecting piece is used for connecting two adjacent battery cells. Therefore, voltage signals of two adjacent battery cells can be transmitted to the flexible circuit board through the guide connecting piece; the flexible circuit board is provided with an acquisition member, and the acquisition member is used for being connected with the guide connection member. Wherein the first direction is perpendicular to the second direction. By means of the mode, the flexible circuit board, the battery management system guiding piece and the collecting piece are all integrated on the support body, a conventional CCS assembly and BMS integration mode is replaced, the cost is reduced, the volume utilization rate is increased, the energy density is increased, and the failure rate is reduced.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a BCMIS component and a battery pack. Background Art

[0002] At present, with the strong support of the country, the energy storage industry is developing rapidly, and battery pack related technologies are rapidly iterating and updating, developing in the direction of miniaturization, high energy density, low failure rate and long life. At present, communication energy storage backup equipment is mainly 2U, 3U, and 4U in size, and the battery cells are gradually replaced by lithium iron phosphate batteries from lead-acid batteries. The common battery pack structure consists of battery modules, battery control systems, signal acquisition systems, conductive connection systems, and shells. The internal space is full of various wiring harnesses, the control system is large in size, and the sampling system is mostly based on wiring harnesses, resulting in a common communication power supply volume energy density of only 210kWh / m 3 At present, the communication backup battery pack is mostly collected by wire harness sampling, which requires a lot of manpower, has a low degree of automation, is easy to install incorrectly, and has the phenomenon of mis-installation.

[0003] In the prior art, taking a common communication backup battery pack (PACK) as an example, there are seven main wiring harnesses inside the product, including the total positive power supply, the total negative power supply, the total positive battery, the total negative battery, the temperature collection line, the voltage collection line, and the battery control system collection line. The wiring harness has a high cost and occupies a large space. The more wiring harnesses there are, the more corresponding connection interfaces there are, and the failure rate and temperature rise also increase accordingly. Currently, the common battery control system (BMS) and the battery module are connected by the first seven wiring harnesses, and the battery control system occupies about 10% of the entire internal space of the battery pack.

[0004] In order to solve the above problems, it is necessary to provide a battery connection management integrated system (BCMIS) component and a battery pack. Utility Model Content

[0005] The embodiments of the present application aim to provide a BCMIS component and a battery pack to reduce the failure rate and improve the volume utilization of the battery pack.

[0006] In order to solve the above technical problems, a technical solution adopted in the present application is: to provide a BCMIS component for electrically connecting a battery module, wherein the battery module includes a plurality of battery cell components stacked along a second direction, and the battery cell components include a plurality of battery cells stacked along a first direction, and the BCMIS component includes a bracket body, on which a flexible circuit board, a battery management system and a conductive component are integrated, the flexible circuit board is used to connect to the battery management system, and the conductive component is used to connect two adjacent battery cells so that the voltage signals of the two adjacent battery cells can be transmitted to the flexible circuit board through the conductive component; a collecting component is provided on the flexible circuit board, and the collecting component is used to connect to the conductive component; wherein the first direction and the second direction are perpendicular to each other.

[0007] In one or more / any one of the above optional embodiments, a plurality of explosion-proof holes are provided on the bracket body, and the explosion-proof holes are matched with the explosion-proof valves on the battery core.

[0008] In one or more / any one of the above optional embodiments, a detection component is provided in the explosion-proof hole, the detection component is electrically connected to the battery cell, and the detection component is used to detect an out-of-control state of the battery cell.

[0009] In one or more / any one of the above optional embodiments, it also includes an output panel, which is electrically connected to the flexible circuit board, and the output panel is integrated with an output interface, and the output interface is electrically connected to the detection component; the output panel is electrically connected to the input pole and output pole of the battery module through two copper bars.

[0010] In one or more / any one of the above optional embodiments, a buckle is provided on the end of the collecting member facing away from the flexible circuit board, and the buckle is used to connect with the collecting device.

[0011] In one or more / any one of the above optional embodiments, a thermistor is integrated on the collecting member, and the thermistor is connected to the conducting member.

[0012] In one or more / any one of the above optional embodiments, the conductive member includes a plurality of first conductive members and a plurality of second conductive members, the plurality of first conductive members are arranged at intervals along the first direction, the plurality of second conductive members are arranged at intervals along the second direction, the first conductive members are used to connect to two of the battery cells adjacent to each other along the first direction, and the second conductive members are used to connect to two of the battery cells adjacent to each other along the second direction.

[0013] In one or more / any one of the above optional embodiments, the first conductive member includes a first connecting portion, a recessed portion, and a second connecting portion, the first connecting portion and the second connecting portion are connected via the recessed portion, and the first connecting portion and the second connecting portion are respectively connected to two adjacent battery cells.

[0014] In one or more / any one of the above optional embodiments, the bracket body includes a first bracket and a second bracket, the second bracket is provided with a receiving groove along a third direction, the first bracket is accommodated in the receiving groove, a positioning column is provided in the receiving groove, the first bracket is provided with a positioning hole corresponding to the position of the positioning column, and the positioning column is passed through the positioning hole; wherein, the flexible circuit board and the battery management system are integrated in the first bracket, the conductive member is provided in the second bracket, and the first direction, the second direction and the third direction are perpendicular to each other.

[0015] An embodiment of the present application also provides a battery pack, comprising the above-mentioned BCMIS component and a battery module.

[0016] In the embodiment of the present application, the BCMIS component and battery pack integrate the flexible circuit board, battery management system guide and collection parts into the bracket body, replacing the conventional CCS component and BMS integration, thereby reducing costs, improving volume utilization, increasing energy density and reducing failure rate.

[0017] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be exemplified below. Obviously, the drawings described below are only some embodiments of the present application, and these exemplary descriptions do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements, and unless otherwise stated, the figures in the drawings do not constitute a scale limitation.

[0019] Figure 1 is a schematic structural diagram of a battery pack according to an embodiment of the present application;

[0020] Figure 2 is a schematic diagram of the structure of the BCMIS component in the battery pack of an embodiment of the present application;

[0021] Figure 3 yes Figure 1 The enlarged schematic diagram of point A in the middle;

[0022] Figure 4 yes Figure 1 The enlarged schematic diagram of point B in the middle;

[0023] Figure 5 yes Figure 2 A partial enlarged view of

[0024] Figure 6 yes Figure 2 A partial enlarged view of

[0025] Figure 7 yes Figure 2 Schematic diagram of the structure of the first conductive member.

[0026] The reference numerals in the specific implementation manner are as follows:

[0027] X, first direction; Y, second direction; Z, third direction;

[0028] 100. Battery module;

[0029] 110. Packaging;

[0030] 120. battery cell assembly; 121. battery cell;

[0031] 130, straps;

[0032] 200, BCMIS components;

[0033] 210, support body;

[0034] 211, first bracket; 2111, explosion-proof hole; 2112, positioning hole;

[0035] 212, second bracket; 2121, receiving groove; 2122, positioning column; 2123, first mounting groove; 2124, second mounting groove; 2125, third mounting groove; 2126, first limiting column; 2127, second limiting column;

[0036] 220, guide and connection parts;

[0037] 221, first connecting member; 2211, first connecting portion; 2212, recessed portion; 2213, second connecting portion; 2214, first limiting hole; 2215, welding portion;

[0038] 222, second guide member; 2221, second limiting hole;

[0039] 223, the third connecting piece;

[0040] 230. Output panel;

[0041] 240a, first copper bar; 240b, second copper bar;

[0042] 250. Inspection parts;

[0043] 260. Collection items. DETAILED DESCRIPTION

[0044] In order to facilitate the understanding of the present application, the present application is described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application. It should be noted that when an element is described as "fixed to" another element, it can be directly on the other element, or there can be one or more centered elements therebetween. When an element is described as "connected to" another element, it can be directly connected to the other element, or there can be one or more centered elements therebetween.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0046] In the description of the embodiments of the present application, the orientation or positional relationship indicated by technical terms such as "length", "width", and "thickness" is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the embodiments of the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the embodiments of the present application.

[0047] In the description of the embodiments of the present application, the use of words such as "first" and "second" to define components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above words have no special meanings and therefore cannot be understood as limiting the scope of protection of the present application. In the description of the embodiments of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0048] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in this specification includes any and all combinations of one or more of the related listed items.

[0049] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0050] like Figure 1 and Figure 2 As shown, an embodiment of the present application provides a battery pack 1, including a battery module 100 and a BCMIS assembly 200, wherein the BCMIS assembly 200 is mounted on the battery module 100 and electrically connected to the battery module 100.

[0051] In some embodiments, Figure 1 As shown, the battery module 100 is substantially in the shape of a cuboid. The battery module 100 includes a packaging component 110 and a battery cell assembly 120. The packaging component 110 encloses an installation space, and the battery cell assembly 120 is arranged in the installation space.

[0052] In some embodiments, the package 110 is composed of four L-shaped fixing brackets, and the four L-shaped fixing brackets together enclose the above-mentioned installation space.

[0053] In some embodiments, the package 110 further includes a cover plate, which is installed above the four L-shaped fixing brackets to cover the above-mentioned installation space. It can be understood that the cover plate has an opening, and the opening is used to expose the pole of the battery cell assembly 120.

[0054] The battery cell assembly 120 includes a plurality of stacked battery cells 121. The battery cells 121 may be in a rectangular parallelepiped shape, and the plurality of battery cells 121 are stacked along the thickness direction thereof.

[0055] For the convenience of description, the thickness direction of the battery cell 121 is the first direction X, that is, the stacking direction of the battery cell 121 is the first direction X, the width direction of the battery cell 121 is the second direction Y, and the length direction of the battery cell 121 is the third direction Z. It can be understood that the first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0056] In some embodiments, to increase the stability of the battery cell assembly 120 , a binding strap 130 is disposed on the periphery of the packaging member 110 , and the binding strap binds the four L-shaped fixing brackets to limit the movement of the battery cell 121 in the first direction X and the second direction Y.

[0057] Among them, the battery cells 121 of the battery cell assembly 120 are electrically connected in series, and the battery cells 121 are secondary batteries, for example, lithium-ion batteries. The battery module 100 may include a plurality of stacked battery cell assemblies 120, and the plurality of battery cell assemblies 120 are arranged along the second direction Y. The plurality of battery cell assemblies 120 may be electrically connected in series or in parallel. Each battery cell assembly 120 includes a first pole and a second pole. The first pole and the second pole are respectively a pole of the first battery cell and the last battery cell along the first direction X. It can be understood that the polarities of the first pole and the second pole are different. In a specific embodiment, the number of battery cells 121 in the battery cell assembly 120 is 8, and the 8 battery cells 121 are electrically connected in series.

[0058] The present embodiment of the application is described by taking the battery module 100 including two battery cell assemblies 120 as an example. Two adjacent battery cell assemblies are defined as a first battery cell assembly and a second battery cell assembly, and the first battery cell assembly and the second battery cell assembly are arranged along the second direction Y.

[0059] In order to realize the electrical connection between the BCMIS component 200 and the battery module 100, the BCMIS component 200 is installed on the battery module 100 along the third direction Z. Figure 2 As shown, the BCMIS component 200 includes a bracket body 210, on which a flexible circuit board, a battery management system (BMS) and a conductive connector 220 are integrated. The flexible circuit board is used to connect to the battery management system (BMS), and the conductive connector 220 is used to connect two adjacent battery cells 121 so that signals such as the voltage and temperature of the two adjacent battery cells 121 can be transmitted to the flexible circuit board through the conductive connector 220.

[0060] It should be noted that the flexible circuit board in the embodiment of the present application integrates a voltage and temperature sampling circuit, a battery system control circuit, a balancing circuit, a charging and discharging circuit, etc.

[0061] Specifically, two poles are provided on one side of each battery cell 121 close to the bracket body 210, the two poles have different polarities, and the two poles are arranged along the second direction Y. The conductive member 220 is electrically connected to one pole of two adjacent battery cells 121. It can be understood that the polarities of the two poles connected to the conductive member 220 are different.

[0062] In some embodiments, the battery cell 121 is provided with an explosion-proof valve, which is used to release the high-temperature material in the battery cell 121 when thermal runaway occurs in the battery cell 121, so as to improve the problem of explosion of the battery cell 121. The explosion-proof valve is located on one side of the battery cell 121 close to the bracket body 210 and between the two poles of the battery cell 121.

[0063] Correspondingly, a plurality of explosion-proof holes 2111 are provided on the support body 210, and the explosion-proof holes 2111 are adapted to the explosion-proof valve. Specifically, the explosion-proof hole 2111 can be roughly circular. The explosion-proof hole 2111 corresponds to the position of the explosion-proof valve of the battery cell 121, that is, when observed along the third direction Z, the explosion-proof valve and the explosion-proof hole 2111 at least partially overlap, so that when the explosion-proof valve sprays out high-temperature substances, the high-temperature substances can be sprayed through the explosion-proof hole 2111 to the side of the support body 210 away from the battery cell assembly 120. It can be understood that each explosion-proof hole 2111 corresponds to an explosion-proof valve. Further, when observed along the direction in which the support body 210 and the battery cell assembly 120 are arranged, the explosion-proof valve is located in the explosion-proof hole 2111, so that the support body 210 does not block the explosion-proof valve, thereby improving the passing rate of high-temperature substances through the explosion-proof hole 2111. Optionally, the support body 210 is made of flame-retardant material.

[0064] In some embodiments, Figure 2 As shown, the bracket body 210 includes a first bracket 211 and a second bracket 212, the flexible circuit board and the battery management system are integrated in the first bracket 211, and the conductive member 220 is disposed in the second bracket 212. Figure 3 and Figure 4 As shown, the second bracket 212 is provided with a receiving groove 2121 along the third direction Z, the first bracket 211 is received in the receiving groove 2121, a positioning column 2122 is provided in the receiving groove 2121, and a positioning hole 2112 is provided at the position of the first bracket 211 corresponding to the positioning column 2122, and the positioning column 2122 is penetrated in the positioning hole 2112, so as to detachably connect the first bracket 211 with the second bracket 212. Optionally, the number of the positioning column and the positioning hole are both multiple, so as to enhance the stability of the connection between the first bracket and the second bracket. Optionally, the first bracket 211 and the second bracket 212 are made of insulating material, such as plastic material, to increase the insulation between the conductive member 220. Optionally, the conductive member 220 is made of a material with strong conductivity, such as copper or aluminum.

[0065] It should be noted that the explosion-proof hole 2111 is provided on the first bracket 211 .

[0066] In some embodiments, along the third direction Z, the thickness of the second bracket 212 is less than or equal to the depth of the receiving groove 2121 .

[0067] like Figure 3 As shown, a first mounting groove 2123 is provided on a side of the second bracket 212 away from the battery cell 121, and two first through holes are provided on the bottom wall of the first mounting groove 2123, and the first through holes are used for the poles of the battery cell 121 to extend into the first mounting groove 2123. The first through holes correspond to the positions of the poles of the battery cell 121, and since a plurality of battery cells 121 are stacked along the first direction X, the two first through holes are arranged at intervals along the first direction X, and one pole of each of two adjacent battery cells 121 can extend into the first mounting groove 2123 through the two first through holes. The conductive member 220 includes a first conductive member 221, and the first conductive member 221 is arranged in the first mounting groove 2123. The first conductive member 221 can be electrically connected to one pole of each of two adjacent battery cells 121 in the first mounting groove 2123, so as to electrically connect the two adjacent battery cells 121. It can be understood that the polarities of the two poles extending into the first mounting groove 2123 are different. It can be understood that there are multiple first installation grooves, and the multiple first installation grooves are arranged at intervals along the first direction X, that is, the multiple first guiding members are arranged at intervals along the first direction.

[0068] In some embodiments, along the third direction Z, the depth of the first installation groove 2123 is greater than or equal to the thickness of the first connecting member 221 .

[0069] like Figure 5 As shown, a second mounting groove 2124 is provided on a side of the second bracket 212 away from the battery cell 121, and two second through holes are provided on the bottom wall of the second mounting groove 2124, and the second through holes are used for one pole of each of the two adjacent battery cell assemblies 120 (the first battery cell assembly and the second battery cell assembly) to extend into the second mounting groove 2124. That is, the second through hole is used for the first pole of the first battery cell assembly and the second pole of the second battery cell assembly to extend into the second mounting groove 2124. Among them, the second through hole corresponds to the position of one pole of each of the two adjacent battery cells 121 along the second direction Y, and one pole of one battery cell 121 can extend into the second mounting groove 2124 through the second through hole. The conductive member 220 includes a second conductive member 222, which is disposed in the second mounting groove 2124, and the second conductive member 222 can be electrically connected to one pole of each of the two adjacent battery cells 121 in the second mounting groove 2124, so as to electrically connect the two adjacent battery cells 121 (or the two adjacent battery cell assemblies). It is understandable that the polarities of the two poles extending into the second installation slot 2124 are different. When there are multiple battery cell assemblies, the multiple second installation slots are arranged at intervals along the second direction, that is, the multiple second conductive members are arranged at intervals along the second direction.

[0070] Furthermore, if Figure 6 As shown, a third mounting groove 2125 is provided on a side of the second bracket 212 away from the battery cell 121, and a third through hole is provided on the bottom wall of the third mounting groove 2125. The third through hole is used to allow a pole of the battery cell assembly to extend into the third mounting groove 2125. For example, the third through hole is used to allow the second pole of the first battery cell assembly or the first pole of the second battery cell to extend into the third mounting groove 2125. The conductive member 220 also includes a third conductive member 223, which is disposed in the third mounting groove 2125. The third conductive member 223 can be electrically connected to a pole of the battery cell assembly 120 in the third mounting groove 2125. It can be understood that there are two third conductive members 223, and there are also two corresponding third mounting grooves 2125. The two third conductive members 223 are electrically connected to the second pole of the first battery cell assembly and the first pole of the second battery cell assembly, respectively, so as to lead out the input pole and the output pole of the battery module 100, which is conducive to the electrical connection between the battery module 100 and the output module of the battery pack 1.

[0071] In some embodiments, the BCMIS assembly 200 includes an output panel 230, which is electrically connected to the flexible circuit board. The output panel 230 is integrated with an output interface for transmitting signals of the battery module 100, such as voltage, temperature and other signals.

[0072] In some embodiments, Figure 2As shown, the output panel 230 is electrically connected to the input pole and the output pole of the battery module 100 through two copper bars 240a and 240b. For example, the two copper bars are the first copper bar 240a and the second copper bar 240b, respectively, and the first copper bar 240a and the second copper bar 240b are connected to the two third conductive parts 223, respectively, and then the information of the battery module 100 is fed back through the output panel 230.

[0073] It should be noted that, in the embodiment of the present application, the input pole and the output pole of the battery module 100 correspond to the second pole of the first battery cell assembly and the first pole of the second battery cell, respectively.

[0074] Furthermore, an on-off switch is integrated on the output panel 230 , and the on-off switch is electrically connected to the battery management system. The on-off switch is used to control the charging and discharging of the battery pack 1 .

[0075] In some embodiments, Figure 7 As shown, the first conductor 221 includes a first connection portion 2211, a recessed portion 2212 and a second connection portion 2213, the first connection portion 2211 and the second connection portion 2213 are connected through the recessed portion 2212, and the first connection portion 2211 and the second connection portion 2213 are respectively connected to the poles of two adjacent battery cells 121. The first connection portion 2211, the recessed portion 2212 and the second connection portion 2213 are integrally formed. The recessed portion 2212 can provide elasticity and can adjust the length of the first conductor 221 within a certain range. The setting of the recessed portion 2212 can solve the problem that the first conductor 221 is difficult to flatten when there is a height difference between two adjacent battery cells 121, thereby improving the processing and assembly efficiency of the BCMIS component 200. In addition, the thickness of the battery cells 121 of different capacities may be different, resulting in different spacings between the two poles extending into the first installation groove 2123 along the first direction X. By adjusting the length of the first conductive member 221 along the first direction X, the battery cells 121 of different capacities or thicknesses can be accommodated. For another example, a heat insulating layer needs to be provided between the battery cells 121, or the thickness dimension of the battery cells 121 has a tolerance, resulting in different spacings between the two poles 311 extending into the first installation groove 2123 along the first direction X. By adjusting the length of the first conductive member 221 along the first direction X, the positional deviation between the pole 311 and the first conductive member 221 along the first direction X can be eliminated, and heat insulating layers of different thicknesses can be provided between the battery cells 121. Furthermore, when the battery cell 121 expands, the pole will pull the first conductive member 221, causing the recessed portion 2212 to deform to increase the length of the first conductive member 221 along the first direction X, thereby releasing the stress generated by the expansion of the battery cell 121 and improving the problem of disconnection between the pole and the first conductive member 221 caused by the expansion of the battery cell 121.

[0076] The structure of the second conductive member 222 is similar to that of the first conductive member 221 , and will not be described in detail herein.

[0077] like Figure 7 As shown, the first guide member 221 is provided with a first limiting hole 2214, and the bottom wall of the first installation groove 2123 is provided with a first limiting column 2126, and the first limiting column 2126 is arranged in the first limiting hole 2214. When installing the first guide member 221, the first limiting column 2126 can be inserted into the first limiting hole 2214, so as to facilitate the installation of the first guide member 221; after the first guide member 221 is installed, the first limiting column 2126 is inserted into the first limiting hole 2214, which can reduce the shaking of the first guide member 221 along the first direction X and the second direction Y. Optionally, the number of the first limiting holes is preferably two, for example, a first limiting hole is respectively provided on the first connecting portion and the second connecting portion. It can be understood that the first limiting column corresponds to the first limiting hole one by one.

[0078] Similarly. A second limiting hole 2221 is provided on the second connecting member 222, and a second limiting column 2127 is provided on the bottom wall of the second mounting groove 2124, and the second limiting column 2127 is provided in the second limiting hole 4424. When installing the second connecting member 222, the second limiting column 2127 can be inserted into the second limiting hole 4424, so as to facilitate the installation of the second connecting member 222; after the second connecting member 222 is installed, the second limiting column 2127 is inserted into the second limiting hole 4424, which can reduce the shaking of the connecting portion 4421 along the first direction X and the second direction Y. Optionally, the number of the second limiting holes is preferably two, for example, two first limiting holes are provided on the first connecting portion and the second connecting portion of the second connecting member, respectively. It can be understood that the second limiting column corresponds to the second limiting hole one by one.

[0079] like Figure 7As shown, in some embodiments, the first conductor 221 also includes a welding portion 2215, which is used for welding and connecting with the pole, and the welding portion 2215 is provided at the first connection portion 2211 and the second connection portion 2213. Along the third direction Z (the thickness direction of the first conductor 221), the thickness of the welding portion 2215 is less than the thickness of other parts of the first connection portion 2211. The thickness of the welding portion 2215 is thinner than other parts, which is conducive to reducing the difficulty of welding and connecting the first connection portion 2211 with the pole, and the other parts of the first connection portion 2211 can still meet the original current overcurrent requirements. Optionally, a groove is provided on the side of the first connection portion 2211 away from the battery cell 121 to form the welding portion 2215. It can be understood that the groove corresponds to the position of the pole, that is, when viewed along the third direction Z, the pole is located in the groove. Optionally, the groove has the same shape as the pole, and the size of the groove is greater than or equal to the size of the pole to ensure that the welding portion 2215 can completely cover the pole 311. Optionally, the groove is formed by cold heading from the first connection part 2211. The welding part on the second connection part is the same as the welding part on the first connection part, and will not be described in detail here.

[0080] It can be understood that the above-mentioned welding part is provided on both the second conductive member and the third conductive member.

[0081] In some embodiments, Figure 2 As shown, a detection member 250 is provided in the explosion-proof hole 2111, and the detection member 250 is electrically connected to the battery cell 121. The detection member 250 is used to detect the out-of-control state of the battery cell 121. Optionally, there are multiple detection members 250, and each explosion-proof hole 2111 is provided with a detection member 250. The detection member 240 is electrically connected to the output interface on the output panel 230, and then transmits the information of the out-of-control state of the battery cell to the outside through the output interface on the output panel 230.

[0082] In some embodiments, the BCMIS assembly 200 includes a collection member 260, which is disposed on the first bracket 211 of the bracket body 210. Specifically, the first end of the collection member 260 is connected to the battery management system, and the second end of the collection member 260 is connected to the conductive member 220. Among them, each of the first conductive member 221, the second conductive member 222 and the third conductive member 223 is connected with a collection member 260. And the second end of the collection member 260 is provided with a thermistor (not shown) near the lower end surface of the conductive member 220. One end of the thermistor is connected to the conductive member 220, and the other end of the thermistor is connected to the collection member 260, so that the temperature signal and voltage signal collected and received by the collection member 260 can be transmitted to the battery management system.

[0083] In some embodiments, a bending portion is provided between the first end of the collecting member 260 and the second end of the collecting member 260 to adaptively adjust the length of the collecting member and enhance the stability of the connection between the collecting member 260 and the connecting member 220 .

[0084] In some embodiments, the collecting member 260 is a nickel sheet.

[0085] In some embodiments, a buckle is provided at one end of the collecting member 260 away from the bracket body 210 , and the buckle is used to connect a collecting device to facilitate the collecting device to collect temperature information of the conductive member 220 and voltage information of the battery cell.

[0086] The BCMIS components and battery packs of the embodiments of the present application integrate the flexible circuit board, battery management system guides and collection components into the bracket body, replacing the conventional CCS components and BMS integration, thereby reducing costs, improving volume utilization, increasing energy density, and reducing failure rates.

[0087] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Under the concept of the present application, the technical features in the above embodiments or different embodiments may also be combined, the steps may be implemented in any order, and there are many other changes in different aspects of the present application as described above, which are not provided in detail for the sake of simplicity. Although the present application has been described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A BCMIS component for electrically connecting a battery module, characterized in that: The battery module comprises a plurality of battery cell assemblies stacked along a second direction, the battery cell assembly comprises a plurality of battery cells stacked along a first direction, and the BCMIS assembly comprises: A bracket body, wherein a flexible circuit board, a battery management system and a conductive connector are integrated on the bracket body, wherein the flexible circuit board is used to connect with the battery management system, and the conductive connector is used to connect two adjacent battery cells, so that the voltage signals of the two adjacent battery cells can be transmitted to the flexible circuit board through the conductive connector; a collection component is provided on the flexible circuit board, and the collection component is used to connect with the conductive connector; The first direction and the second direction are perpendicular to each other.

2. The BCMIS assembly according to claim 1, characterized in that The support body is provided with a plurality of explosion-proof holes, and the explosion-proof holes are matched with the explosion-proof valves on the battery core.

3. The BCMIS assembly according to claim 2, characterized in that A detection component is provided in the explosion-proof hole, the detection component is electrically connected to the battery cell, and the detection component is used to detect the out-of-control state of the battery cell.

4. The BCMIS assembly according to claim 3, characterized in that Also includes: An output panel, electrically connected to the flexible circuit board, the output panel being integrated with an output interface, the output interface being electrically connected to the detection element; The output panel is electrically connected to the input pole and the output pole of the battery module through two copper bars.

5. The BCMIS assembly according to claim 1, characterized in that A buckle is provided on one end of the collecting member away from the flexible circuit board, and the buckle is used to connect with the collecting device.

6. The BCMIS assembly according to claim 1, characterized in that The collecting component is integrated with a thermistor, and the thermistor is connected to the conducting component.

7. The BCMIS assembly according to claim 1, characterized in that The conductive member includes a plurality of first conductive members and a plurality of second conductive members, wherein the plurality of first conductive members are arranged at intervals along the first direction, and the plurality of second conductive members are arranged at intervals along the second direction, wherein the first conductive members are used to connect to two adjacent battery cells along the first direction, and the second conductive members are used to connect to two adjacent battery cells along the second direction.

8. The BCMIS assembly according to claim 7, characterized in that The first conductive member includes a first connecting portion, a recessed portion, and a second connecting portion. The first connecting portion and the second connecting portion are connected via the recessed portion. The first connecting portion and the second connecting portion are respectively connected to two adjacent battery cells.

9. The BCMIS assembly according to any one of claims 1 to 8, characterized in that: The bracket body comprises a first bracket and a second bracket, the second bracket is provided with a receiving groove along the third direction, the first bracket is received in the receiving groove, a positioning column is provided in the receiving groove, the first bracket is provided with a positioning hole at a position corresponding to the positioning column, and the positioning column is passed through the positioning hole; The flexible circuit board and the battery management system are integrated in the first bracket, the conductive component is arranged on the second bracket, and the first direction, the second direction and the third direction are perpendicular to each other.

10. A battery pack, characterized in that: Comprising a BCMIS component and a battery module as described in any one of claims 1 to 9.

Images