KR102449719B1 - A battery module assembly with a built-in wireless cell sensing unit that has excellent communication reliability and is removable and integrated, and a battery system assembly including the same - Google Patents

Abstract

An embodiment according to the present invention relates to a battery module assembly with a built-in wireless cell sensing unit which has excellent communication reliability and can be attached/detached and integrated, and a battery system assembly including the same. The battery module assembly according to an embodiment includes: a module case covering a predetermined battery module; a bus bar unit fixing the battery module and electrically connected to the same; and a wireless cell sensing unit capable of being detached from, attached to and integrated with the module case. The wireless cell sensing unit can be detached from, attached to and integrated with the module case itself through a sensing slot penetrating through the module case, and can be electrically connected in direct contact to the bus bar unit. The wireless cell sensing unit includes: a sensing unit body; and a sensing antenna disposed on the sensing unit body, wherein an upper portion of the sensing antenna may be positioned higher than an upper surface of the module case.

Description

TECHNICAL FIELD A battery module assembly with a built-in wireless cell sensing unit that has excellent communication reliability and is removable and integrated, and a battery system assembly including the same}

Embodiments relate to a battery module assembly and a battery system assembly including the same. Specifically, the embodiment has excellent communication reliability and is equipped with a wireless cell sensing unit capable of being detached and integrated. It relates to a battery module assembly and a battery system assembly including the same.

Recently, as the development of electric vehicles, storage batteries for energy storage, robots, etc. is in full swing, research on high-performance secondary batteries is being actively conducted. Commercially available secondary batteries include lithium secondary batteries, nickel cadmium batteries, nickel hydride batteries, and nickel zinc batteries. Among them, lithium secondary batteries are attracting attention for their advantages such as free charge/discharge, a very low self-discharge rate, and high energy density because they do not have a memory effect compared to nickel-based secondary batteries.

These lithium secondary batteries mainly use a lithium-based oxide and a carbon material as a positive electrode active material and a negative electrode active material, respectively. and a case, which is an exterior material, sealed and accommodated together with the electrolyte.

Lithium-ion batteries are very important to ensure safety and reliability when used in electric vehicles, and if these limits are exceeded during operation, the performance of the battery may be rapidly weakened or serious problems may occur to the safety of the driver or passengers.

For example, if the operating voltage of the battery is too low or the battery is overdischarged, the grid is destroyed by a phase change, which seriously affects the battery performance. If an extremely low voltage or over-discharge condition is reached, the electrolyte will decrease and combustion gas may be generated, which may pose a safety hazard.

In addition, when the battery operating voltage becomes very high or the battery becomes overcharged, a synthesis action occurs at the anode and a significant amount of heat is generated. and may cause safety issues.

As a method to solve this problem, a battery management system (BMS) that can properly and efficiently control and manage a lithium-ion battery for an operating system is applied, and the battery system of an electric vehicle together with a battery pack make up an assembly.

1 is a photograph of a battery system assembly of an electric vehicle according to the prior art.

Referring to FIG. 1 , the battery system assembly of an electric vehicle according to the related art includes a BMS ECU (① main relay (②), pre-charge relay (③), pre-charge resistor (④), battery current sensor (⑤), and main fuse. (⑥), a battery temperature sensor (⑦), and a cell monitoring unit (CMU) (⑧).

In an electric vehicle battery system assembly, a battery management system (BMS) plays a role in protecting the battery by monitoring the battery and predicting its state, and managing the battery by transferring data and maintaining the balance.

In particular, BMS performs key functions such as precise measurement of battery cell voltage, accurate prediction of battery health, maintaining battery uniformity and equivalence, and diagnosing battery faults.

Meanwhile, a battery pack for an electric vehicle includes a plurality of battery modules, and a plurality of battery cells are connected in series or in parallel to each battery module.

Accordingly, since hundreds of battery cells are connected in series or parallel to the battery pack, the accumulated voltage may vary depending on the voltage measurement method, so it is almost impossible to remove or compensate for it, and it is very difficult to design a circuit measurement.

Accordingly, the electric vehicle battery system assembly employs a cell monitoring unit (CMU) that measures the voltage of individual battery cells in each battery module, an over voltage protection device (OPD), and the like and transmits it to the BMS ECU.

2A is a circuit diagram of a battery system assembly of an electric vehicle according to the prior art;

FIG. 2B is an enlarged conceptual view of the first battery module area A1 in FIG. 2A .

Referring to FIG. 2A , a battery system assembly of an electric vehicle according to the related art includes a plurality of battery modules, a power relay assembly, a main fuse, a CMU, a BMS ECU, and the like.

At this time, the battery cell monitoring unit (CMU) is located on the side of the battery module and fastened to the lower case of the battery pack with bolts, etc. is connected by wire.

For example, referring to FIG. 2A , the battery system assembly includes a total of 24 battery modules, 6 CMUs are located on one side of the battery modules, and one CMU is the voltage of each battery cell in the 4 battery modules. is sensed and transmitted to the BMS ECU.

Specifically, referring to FIG. 2B , CMU 1 is connected to each of the battery modules 21 to 24 with a first wire L1 in a state where it is fixed to the battery pack lower case on one side of the battery module with a bolt, and the battery module The voltage of each battery cell within 21 to 24 is sensed and transmitted to the BMS ECU through the second wire L2.

For example, the CMU 1 includes the battery PCBs (not shown) of the battery modules 21 to 24 and the 1-1 wire L1a, the 1-2 wire L1b, the 1-3 wire L1c, and the first Each of the -4 wires L1d is electrically connected to sense the voltage of each battery cell in 21 to 24 battery modules, and the voltage is transmitted to the BMS ECU through the second wire L2.

However, according to the prior art, as the battery cell monitoring units (CMUs) are separately located and mounted in the lower case of the battery pack outside the battery module, a separate space in which the CMUs are mounted is required, thereby increasing the volume of the battery system assembly.

In addition, as CMUs are wired to each battery module and wired to the BMS ECU, numerous wires are placed in the battery system assembly, making the wires complicated, and there are safety issues such as wire derailment and disconnection.

In addition, in the prior art, one CMU measures the voltage of several battery modules due to space problems. If there is a message that the voltage of the battery cells is abnormal, check whether there is a problem with the battery cells or with the CMU itself. This is difficult, and in some cases, the battery module and the entire CMU are replaced with a set.

Meanwhile, in order to solve the above problems, the inventors of this application studied how to wirelessly communicate each CMU to the BMS ECU through internal research. Specifically, through internal research, wireless communication units connected by wires to the CMU and connectors were additionally installed, and a method for wireless communication with the BMS ECU through wireless communication units was studied.

However, this additional mounting method does not solve the problem of the space occupied by the CMU on the side of the existing battery module. In particular, in the high vibration environment of automobiles, it is difficult to guarantee the location or fixability of the additionally mounted wireless communication units, so structural stability is not guaranteed. I have a problem that I can't.

In addition, the above internal research method does not solve the problem that the CMU is still connected to multiple battery modules with wired wires.

On the other hand, the inventors of this application studied a way to combine the wireless communication function in the CMU itself instead of installing a separate wireless communication device through additional research.

However, as shown in FIG. 1 , it has been studied that radio waves are blocked between the CMUs and the BMS EUC by numerous metallic battery cases and metallic lower case structures of the battery system assembly, resulting in a communication loss, thereby reducing communication reliability.

In other words, there is a technical problem in that it is difficult to add a wireless communication function to the CMU in the existing structure due to the problem of low radio wave transmission due to the existence of objects that block radio waves between the CMU and the BMS ECU.

One of the technical tasks of the embodiment is to provide a battery module assembly capable of solving the problem of wireless communication loss of the CMU due to the presence of objects blocking radio waves between the CMU and the BMS ECU, and a battery system assembly including the same.

In addition, one of the technical problems of the embodiment is to provide a battery module assembly and a battery system assembly including the same, which can solve the problem that structural stability is not guaranteed in a high vibration environment when wireless communication units are additionally mounted on the outside of the battery module to be.

In addition, the embodiment solves the problem that the volume increases as the CMUs are separately located outside the battery module in the prior art, the wire wiring becomes complicated as the CMUs are connected with each battery module by wire, and the problem that the wire disconnection occurs An object of the present invention is to provide a battery module assembly capable of solving the problem and a battery system assembly including the same.

Another embodiment is to provide a battery module assembly capable of solving the problem of replacing the entire battery module and the CMU as a set when there is a voltage error message of the battery cell, and a battery system assembly including the same.

The technical problems of the embodiments are not limited to those described in this item, and include those identified from the description of the invention.

The battery module assembly according to the embodiment includes a module case covering a predetermined battery module, a bus bar unit electrically connected to fixing the battery module, and a wireless cell sensing unit that can be detached and integrated into the module case. may include

The wireless cell sensing unit may be detachably mounted on and integrated with the module case itself through a sensing slot penetrating the module case, and may be electrically connected to the bus bar unit in direct contact.

The wireless cell sensing unit may include a sensing unit body and a sensing antenna disposed on the sensing unit body, and an upper portion of the sensing antenna may be positioned higher than a top surface of the module case.

The module case includes a first module case and a second module case disposed on the front and rear surfaces of the battery module, respectively, a third module case disposed on the side surface and the upper surface of the battery module, and a third positioned on the bottom of the battery module It may include a 4 module case.
In addition, the battery module assembly according to the embodiment,
A module case including a sensing slot through which one side is penetrated and covering a predetermined battery module, a bus bar unit that fixes the battery module and is electrically connected, and a wireless cell sensing unit that can be detached and integrated into the module case may include
The module case includes a first module case and a second module case disposed on the front and rear surfaces of the battery module, respectively, a third module case disposed on the side surface and the upper surface of the battery module, and a third positioned on the bottom of the battery module It may include a 4 module case.
The wireless cell sensing unit may be detachably mounted to and integrated with the first module case itself through the sensing slot passing through the first module case, and may be electrically connected to the bus bar unit in direct contact with it.
The wireless cell sensing unit may include a sensing unit body and a sensing antenna disposed on the sensing unit body, and an upper portion of the sensing antenna may be positioned higher than an upper surface of the case body of the first module case.
The first module case includes the case body, a coupling protrusion protruding in a first direction from a first area of the case body, and first and second buses protruding in the first direction from a second area of the case body. The sensing slot in the form of a hole penetrating between the bar accommodating part and the first and second bus bar accommodating parts may be included.
The sensing unit body of the wireless cell sensing unit mounted on the first module case itself may not protrude from a side surface of the case body of the first module case in which the sensing slot is disposed.

The wireless cell sensing unit may be detachably mounted on and integrated with the first module case itself through a first sensing slot provided in the first module case.

The material of the first module case may be a plastic material, and the second module case to the fourth module case may be formed of a metal material.

The first module case includes a case body, a coupling protrusion protruding in a first direction from a first area of the case body, and first and second bus bars protruding in the first direction from a second area of the case body. and the first sensing slot in the form of a hole penetrating between the accommodating part and the first and second bus bar accommodating parts.

The bus bar unit coupled to the first module case includes a bus bar frame, a bus bar circuit board disposed on one surface of the bus bar frame, and a third electrically connected to the bus bar circuit board and coupled to the bus bar frame. It may include a first bus bar terminal and a second bus bar terminal.

The first bus bar terminal and the second bus bar terminal may be respectively coupled to the first bus bar accommodating part and the second bus bar accommodating part to be positioned.

The wireless cell sensing unit may be positioned lower than an end of the first bus bar terminal and an end of the second bus bar terminal with respect to a side surface of the case body.

The wireless cell sensing unit may be arranged to be lower than a first straight line based on a side surface of the case body than a first virtual straight line connecting the end of the first bus bar terminal and the end of the second bus bar terminal.

The wireless cell sensing unit may be disposed lower than the second straight line with respect to the side of the case body than a second imaginary straight line connecting the end of the first bus bar accommodating part and the end of the second bus bar accommodating part.

The battery system assembly according to the embodiment may include any one of the battery module assemblies and the battery controller.

According to the embodiment, it has excellent communication reliability and is equipped with a wireless cell sensing unit that can be detached and integrated. A battery module assembly and a battery system assembly including the same may be provided.

Specifically, a removable wireless cell sensing unit according to an embodiment is built-in. According to the battery module assembly and the battery system assembly including the same, there is a technical effect that can solve the problem of the wireless communication loss of the CMU due to the existence of objects that block radio waves between the CMU and the BMS ECU.

For example, in an embodiment, the wireless cell sensing unit may include a sensing unit body and a sensing antenna, and an upper portion of the sensing antenna may be disposed higher than an upper surface of the case body.

Through this, even if there are metal objects between the wireless cell sensing unit and the BMS ECU, there is a special technical effect that can ensure high communication reliability of radio waves with the BMS ECU through the sensing antenna protruding above the battery module assembly.

In addition, according to the embodiment, when the wireless communication units are additionally mounted on the outside of the battery module, there is a technical effect that can solve the problem that structural stability is not guaranteed in a high vibration environment.

For example, according to an embodiment, the wireless cell sensing unit may be detachably attached to the module case itself through a sensing slot provided in the first module case, and may be coupled to be integrated. For example, as the wireless cell sensing unit is mechanically and electrically fastened to the bus bar circuit board and fixed through a predetermined socket, there is a special technical effect of very high structural and electrical stability even in a high vibration environment.

In addition, according to the embodiment, in the prior art, the problem of increasing the volume as the CMUs are separately located outside the battery module, the wiring becomes complicated as the CMUs are connected to each battery module by wire, and disconnection of the wire occurs. There is a technical effect that can solve the problem.

For example, according to the embodiment, the wireless cell sensing unit is detachably attached to the module case itself through a sensing slot provided in the first module case, which is a case of one side of the battery module, and is fastened to be integrated with the wireless cell sensing unit. As it is directly connected to the module PCB of each battery module, there is no need for a separate wired wire between the battery module and the CMU unlike the prior art. Also, since the wireless cell sensing unit can communicate wirelessly with the BMS ECU, the CMUs can communicate with each battery module by wire. There is a special technical effect that can complexly solve the problem of complicated wire wiring problem, wire disconnection problem, and the problem of increasing the volume by CMUs as they are connected.

In addition, according to the embodiment, it is possible to solve the problem of replacing the battery module and the entire CMU as a set when there is a voltage error message of the battery cell.

For example, according to the embodiment, the wireless cell sensing unit can be detachably mounted on the module case itself through a sensing slot provided in the module case on one side of the battery module and is fastened to be integrated with the wireless cell sensing unit in each battery module. If there is an error, there is a technical effect that A/S can be performed quickly and efficiently by replacing only the corresponding wireless cell sensing unit.

For example, according to the embodiment, the wireless cell sensing unit 410 is disposed lower than the first bus bar terminal end 213ae and the second bus bar terminal end 213be with respect to the case body side surface 311S. Since it is positioned inside the first bus bar 213a and the second bus bar terminal 213b, if there is an error in the wireless cell sensing unit in each battery module, the corresponding wireless cell sensing unit is replaced There is a special technical effect that A/S can be performed by quickly and efficiently replacing only the faulty sen-free cell sensing unit without the need to separate other components.

Also, according to the embodiment, the wireless cell sensing unit 410 is disposed lower than the first bus bar terminal end 213ae and the second bus bar terminal end 213be with respect to the case body side surface 311S. Since they are seated inside the first bus bar 213a and the second bus bar terminal 213b, the work proceeds with a predetermined fixing part 312B such as a bolt for fixing or separating the battery module to the battery pack lower case. However, since it is spaced apart from the wireless cell sensing unit 410 itself, there is a special technical effect that can provide a stable and reliable structure because no physical or mechanical pressure or impact is applied.

Also according to the embodiment, the wireless cell sensing unit 410 is disposed lower than the first bus bar receiving end 313ae and the second bus bar receiving end 313be with respect to the side surface 311S of the case body. Accordingly, since it is seated inside the first bus bar receiving part 313a and the second bus bar receiving part 313, a predetermined fixing part 312B such as a bolt for fixing or separating the battery module to the battery pack lower case. ), since it is spaced apart from the wireless cell sensing unit 410 itself, physical and mechanical pressure or impact is not applied, so there is a special technical effect that can provide a stable and reliable structure.

In addition, according to the embodiment, the wireless cell sensing unit 410 is directly engaged with the module PCB of each battery module while seated inside the first bus bar receiving part 313a and the second bus bar receiving part 313 . Unlike the prior art, there is no need for a separate wired wire between the battery module and the CMU. Also, since the wireless cell sensing unit can communicate wirelessly with the BMS ECU, the CMUs are connected to each battery module by wire, resulting in complicated wiring problems and wiring problems. There is a special technical effect that can solve the problem of the disconnection problem and the problem of increasing the volume by CMUs in a complex way.

In addition, according to the embodiment, the wireless cell sensing unit 410 is mounted on the inside of the first bus bar accommodating part 313a and the second bus bar accommodating part 313 in the wireless cell sensing unit in each battery module. When replacing the wireless cell sensing unit in case of an error, there is a special technical effect that A/S can be performed by quickly and efficiently replacing only the faulty non-sensing cell sensing unit without having to separate other components.

The technical effects of the embodiments are not limited to those described in this item, and include those that can be grasped through the description of the invention.

1 is a photograph of a battery system assembly of an electric vehicle according to the prior art.
2A is a circuit diagram of a battery system assembly of an electric vehicle according to the prior art;
FIG. 2B is an enlarged conceptual view of the first battery module area A1 in FIG. 2A .
3A is a perspective view of a battery module assembly 1000 according to an embodiment.
3B is a partially exploded perspective view of the battery module assembly 1000 according to the embodiment shown in FIG. 3A .
4 is an exploded perspective view of the battery module assembly 1000 according to the embodiment shown in FIG. 3A .
5A is a partial detailed view of the battery module assembly 1000 according to the embodiment shown in FIG. 4 .
5B is a detailed view of the wireless cell sensing unit 410 and the first module case 310 of the battery module assembly 1000 according to the embodiment shown in FIG. 5A .
6 is an enlarged view of a second area B2 of the battery module assembly 1000 according to the embodiment shown in FIG. 3 .
FIG. 7 is a first detailed view (B2-1) of a second area of the battery module assembly 1000 according to the embodiment shown in FIG. 6 .
FIG. 8 is a second detailed view (B2-2) of a second area of the battery module assembly 1000 according to the embodiment shown in FIG. 6 .
9 is a third detailed view (B2-3) of a second area of the battery module assembly 1000 according to the embodiment shown in FIG. 6 .
10 is an exemplary view of the electric vehicle 2000 in which the battery system assembly 2100 including the battery module assembly 1000 according to the embodiment is mounted.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, the terms or words used in the present specification and claims should not be construed as being limited to conventional or dictionary meanings, and the inventor should properly understand the concept of the term in order to best describe his invention. Based on the principle that it can be defined, it should be interpreted as meaning and concept consistent with the technical idea of the present invention.

Therefore, the configuration shown in the embodiments and drawings described in the present specification is merely the most preferred embodiment of the present invention and does not represent all of the technical spirit of the present invention, so at the time of the present application, various It should be understood that there may be equivalents and variations. In the drawings, like reference numerals indicate like elements.

In the embodiments described below, the secondary battery refers to a lithium secondary battery. Here, the lithium secondary battery is a generic term for secondary batteries in which lithium ions act as working ions during charging and discharging to induce an electrochemical reaction in the positive and negative plates.

On the other hand, even if the name of the secondary battery is changed depending on the type of electrolyte or separator used in the lithium secondary battery, the type of battery case used to package the secondary battery, the internal or external structure of the lithium secondary battery, etc. Any secondary battery used as a lithium secondary battery should be interpreted as being included in the category of the lithium secondary battery.

The present invention can be applied to other secondary batteries other than lithium secondary batteries. Therefore, even if the operating ions are not lithium ions, any secondary battery to which the technical idea of the present invention can be applied should be interpreted as being included in the scope of the present invention regardless of the type.

(Example)

Figure 3a is excellent in communication reliability according to the embodiment and is equipped with a wireless cell sensing unit that can be detached and integrated It is a perspective view of a battery module assembly (hereinafter referred to as “battery module assembly 1000 according to an embodiment”), and FIG. 3B is a partially separated perspective view of the battery module assembly 1000 according to the embodiment shown in FIG. 3A . (A region B2 of FIG. 3A will be described later along with FIG. 6 ).

Referring to FIG. 3B , the battery module assembly 1000 according to the embodiment includes a predetermined battery module 100 (refer to FIG. 4 ), a module case 300 , a bus bar unit 200 , and a wireless cell sensing unit 410 . may include

In the battery module assembly 1000 according to the embodiment, the wireless cell sensing unit 410 may be detachably mounted on the module case 300 and may have an integrated structure.

This is one of the technical tasks of the embodiment according to the invention, a battery module assembly capable of solving the problem of wireless communication loss of the CMU due to the presence of objects blocking radio waves between the CMU and the BMS ECU, and a battery system assembly including the same is to provide

In addition, one of the technical problems of the embodiment is to provide a battery module assembly and a battery system assembly including the same, which can solve the problem that structural stability is not guaranteed in a high vibration environment when wireless communication units are additionally mounted on the outside of the battery module to be.

In addition, the embodiment solves the problem that the volume increases as the CMUs are separately located outside the battery module in the prior art, the wire wiring becomes complicated as the CMUs are connected with each battery module by wire, and the problem that the wire disconnection occurs An object of the present invention is to provide a battery module assembly capable of solving the problem and a battery system assembly including the same.

Another embodiment is to provide a battery module assembly capable of solving the problem of replacing the entire battery module and the CMU as a set when there is a voltage error message of the battery cell, and a battery system assembly including the same.

Hereinafter, with reference to the drawings, the technical features for solving the technical problem of the present invention will be described in more detail.

4 is an exploded perspective view of the battery module assembly 1000 according to the embodiment shown in FIG. 3A .

In the battery module assembly 1000 according to the embodiment, a predetermined battery module 100 may be mechanically and electrically connected and coupled to the bus bar unit 200 , and the module case 300 may include the battery module 100 . and the bus bar unit 200 can be protected.

For example, the module case 300 includes a first module case 310 and a second module case 320 respectively disposed on the front and rear surfaces of the battery module 100 , and side and top surfaces of the battery module 100 . It may include a third module case 330 disposed in the and a fourth module case 340 disposed on the bottom surface of the battery module 100 .

The material of the first module case 310 may be a high-strength plastic material, and the second module case 320 to the fourth module case 340 may be formed of a metal material such as aluminum.

In an embodiment, the wireless cell sensing unit 410 may be detachably mounted on the module case 300 and may have an integrated structure.

For example, the wireless cell sensing unit 410 may have a structure that can be detached and integrated into the module case 300 itself through the sensing slot 314 provided in the first module case 310 .

According to the embodiment, when the wireless communication units are additionally mounted on the outside of the battery module, there is a technical effect that can solve the problem that structural stability is not guaranteed in a high vibration environment.

For example, according to the embodiment, the wireless cell sensing unit 410 can be attached to and detached from the module case 300 itself through the sensing slot 314 provided in the first module case 310 and is fastened to be integrated. can be For example, as the wireless cell sensing unit 410 is mechanically and electrically fastened to the bus bar circuit board 212 through a predetermined socket and fixed, the structural and electrical stability is very high even in a high vibration environment. It works.

Specifically, FIG. 5A is a partial detailed view of the battery module assembly 1000 according to the embodiment shown in FIG. 4 , and FIG. 5B is a wireless cell sensing unit of the battery module assembly 1000 according to the embodiment shown in FIG. 5A ( 410) and a detailed view of the first module case 310.

First, referring to FIG. 5A , the first module case 310 includes a case body 311 , a coupling protrusion 312 , first and second bus bar accommodating parts 313a and 313b , and a sensing slot 314 . may include

The bus bar unit 200 coupled to the first module case 310 includes a bus bar frame 211, a bus bar circuit board 212, a first bus bar terminal 213a, and a second bus bar terminal 213b. may include

The first bus bar terminal 213a and the second bus bar terminal 213b may be positioned to be coupled to the first bus bar accommodating part 313a and the second bus bar accommodating part 313b, respectively.

The wireless cell sensing unit 410 may include a sensing unit body 412 and a sensing antenna 411 , and a module case 300 through a sensing slot 314 provided in the first module case 310 . It may have a structure that can be detached and integrated into itself, and may be electrically connected to the bus bar circuit board 212 .

The sensing antenna 411 may be a patch type antenna, but is not limited thereto. For example, the sensing antenna 411 may be a patch type antenna including a ground plate, a dielectric material, and a metal patch.

The sensing unit body 412 may be formed of a plastic material, and a wireless communication IC may be mounted thereon.

In addition, the wireless cell sensing unit 410 may be mechanically and electrically firmly coupled to the bus bar circuit board 212 through a predetermined socket to be integrally fixed.

According to an embodiment, the wireless cell sensing unit 410 can be detachably attached to and integrated with the module case 300 itself through the sensing slot 314 provided in the first module case 310 . For example, as the wireless cell sensing unit 410 is mechanically and electrically fastened to the bus bar circuit board 212 through a predetermined socket and fixed, the structural and electrical stability is very high even in a high vibration environment. It works.

In addition, in the embodiment, the material of the first module case 310 may be formed of a high-strength plastic material, which has a technical effect of increasing the communication propagation of the wireless cell sensing unit 410 .

Next, FIG. 5B is a detailed view of the wireless cell sensing unit 410 and the first module case 310 of the battery module assembly 1000 according to the embodiment shown in FIG. 5A .

Referring to FIG. 5B , the coupling protrusion 312 in the first module case 310 may include a coupling body part 312a and a coupling groove 312b, and a predetermined fixing part 312B such as a bolt ( 8) may fix the battery module assembly 1000 to the lower case of the battery pack through the coupling groove 312b.

In addition, the sensing slot 314 in the first module case 310 may include a body slot 314a for accommodating the sensing unit body 412 and an antenna slot 314b for accommodating the sensing antenna 411 . can

According to the embodiment, the body slot 314a and the antenna slot of the sensing slot 314 in which the sensing unit body 412 and the sensing antenna 411 of the wireless cell sensing unit 410 are provided in the first module case 310, respectively. While being fastened to the bus bar unit 200 through the 314b, the module case may be integrated so as to be detachably mounted on itself, and may be electrically connected to the bus bar circuit board 212 of the bus bar unit 200 .

Accordingly, according to the embodiment, the wireless cell sensing unit 410 can be detachably attached to and integrated with the module case 300 itself through the sensing slot 314 provided in the first module case 310 . Also, as the bus bar circuit board 212 is mechanically and electrically fastened and fixed through a predetermined socket, there is a special technical effect that structural and electrical stability is very high even in a high vibration environment.

Next, FIG. 6 is an enlarged view of the second area B2 of the battery module assembly 1000 according to the embodiment shown in FIG. 3 .

Referring to FIG. 6 , the battery module assembly 1000 according to the embodiment includes a first module case 310 having a sensing slot 314 and a wireless cell sensing unit 410 coupled to the sensing slot 314 . ) and a bus bar unit 200 (refer to FIG. 5A ) coupled to the first module case 310 .

The wireless cell sensing unit 410 may be electrically connected to a bus bar circuit board 212 (refer to FIG. 5A ) provided in the bus bar unit 200 .

According to the embodiment, due to the existence of objects blocking radio waves between the CMU and the BMS ECU, communication reliability that can solve the problem of wireless communication loss of the CMU is excellent, A battery module assembly and a battery system assembly including the same may be provided.

In addition, according to the embodiment, when the wireless communication units are additionally mounted on the outside of the battery module, there is a technical effect that can solve the problem that structural stability is not guaranteed in a high vibration environment.

For example, according to an embodiment, the wireless cell sensing unit may be detachably attached to the module case itself through a sensing slot provided in the first module case, and may be coupled to be integrated. For example, as the wireless cell sensing unit is mechanically and electrically fastened to the bus bar circuit board and fixed through a predetermined socket, there is a special technical effect of very high structural and electrical stability even in a high vibration environment.

In addition, according to the embodiment, the wireless cell sensing unit is detachably attached to the module case itself through a sensing slot provided in the first module case, which is a case of one side of the battery module, and is fastened to be integrated, and at the same time, the wireless cell sensing unit is connected to each battery module. As it is directly connected with the module PCB of There is a special technical effect that can complexly solve the problem of complicated wire wiring problem, wire disconnection problem, and the problem of volume increase by CMUs.

In addition, according to the embodiment, the wireless cell sensing unit can be detachably attached to the module case itself through the sensing slot provided in the module case on one side of the battery module and is fastened to be integrated, so that there is an error in the wireless cell sensing unit in each battery module. In this case, there is a technical effect of quickly and efficiently performing A/S by replacing only the corresponding wireless cell sensing unit.

FIG. 7 is a first detailed view B2-1 of the second area of the battery module assembly 1000 according to the embodiment shown in FIG. 6 .

Referring to FIG. 7 , in the embodiment, the wireless cell sensing unit 410 may include a sensing unit body 412 and a sensing antenna 411 , and the sensing antenna upper portion 411T is the upper surface 311T of the case body. ) can be placed higher.

Through this, even if there are metal objects between the wireless cell sensing unit 410 and the BMS ECU, through the sensing antenna 411 protruding above the battery module assembly, a special technical effect that can ensure high communication reliability of radio waves with the BMS ECU. have.

Accordingly, the removable wireless cell sensing unit according to the embodiment is built-in. According to the battery module assembly and the battery system assembly including the same, the upper part of the sensing antenna 411T is disposed higher than the upper surface 311T of the case body, so that radio communication between the CMU and the BMS ECU is blocked due to the presence of objects that block the radio communication of the CMU. It has excellent communication reliability by solving the problem of loss and is equipped with a removable and integrated wireless cell sensing unit. A battery module assembly and a battery system assembly including the same may be provided.

FIG. 8 is a second detailed view B2-2 of a second area of the battery module assembly 1000 according to the embodiment shown in FIG. 6 .

In the embodiment, the bus bar unit 200 coupled to the first module case 310 includes a bus bar frame 211 , a bus bar circuit board 212 , a first bus bar terminal 213a , and a second bus bar terminal ( 213b).

The first bus bar terminal 213a and the second bus bar terminal 213b may be positioned to be coupled to the first bus bar accommodating part 313a and the second bus bar accommodating part 313b, respectively.

The coupling protrusion 312 in the first module case 310 may include a coupling body portion 312a and a coupling groove 312b, and a predetermined fixing part 312B such as a bolt connects the coupling groove 312b. Through this, the battery module assembly 1000 may be fixed.

In this case, in the embodiment, the wireless cell sensing unit 410 may include a sensing unit body 412 and a sensing antenna 411 , and the wireless cell sensing unit 410 is based on the case body side surface 311S. As such, it may be disposed lower than the first bus bar terminal end 213ae and the second bus bar terminal end 213be.

For example, the wireless cell sensing unit 410 is located on the side of the case body rather than the imaginary first straight line S1 connecting the first bus bar terminal end 213ae and the second bus bar terminal end 213be. 311S) may be disposed lower than the first straight line S1.

According to the embodiment, the wireless cell sensing unit 410 can be detachably attached to and integrated with the module case itself through a sensing slot provided in the first module case, and can be coupled to the bus bar circuit board and a predetermined socket. As it is mechanically and electrically fastened and fixed through it, there is a special technical effect with very high structural and electrical stability even in a high vibration environment.

In particular, according to the embodiment, the wireless cell sensing unit 410 is disposed lower than the first bus bar terminal end 213ae and the second bus bar terminal end 213be with respect to the case body side surface 311S. Since it is seated inside the first bus bar 213a and the second bus bar terminal 213b, the operation is performed with a predetermined fixing part 312B such as a bolt for fixing or separating the battery module to the battery pack lower case. Even if progressed, since it is spaced apart from the wireless cell sensing unit 410 itself, physical and mechanical pressure or impact is not applied, so there is a special technical effect that can provide a stable and reliable structure.

In addition, according to the embodiment, the wireless cell sensing unit 410 is disposed lower than the first bus bar terminal end 213ae and the second bus bar terminal end 213be with respect to the case body side surface 311S. Since the first bus bar 213a and the second bus bar terminal 213b are directly connected to the module PCB of each battery module while seated inside the terminal, there is no need for a separate wired wire between the battery module and the CMU unlike the prior art. In addition, since the wireless cell sensing unit can communicate wirelessly with the BMS ECU, as the CMUs are connected to each battery module by wire, the problem of complicated wiring problems, wire disconnection problems, and the problem of increasing the volume by CMUs can be solved in a complex way. There are special technical effects that can be solved.

In addition, according to the embodiment, the wireless cell sensing unit 410 is disposed lower than the first bus bar terminal end 213ae and the second bus bar terminal end 213be with respect to the case body side surface 311S. Since they are seated inside the first bus bar 213a and the second bus bar terminal 213b, if there is an error in the wireless cell sensing unit within each battery module, other components when replacing the corresponding wireless cell sensing unit There is a special technical effect that A/S can be performed by quickly and efficiently replacing only the faulty sen-free cell sensing unit without the need to separate it.

FIG. 9 is a third detailed view B2-3 of the second area of the battery module assembly 1000 according to the embodiment shown in FIG. 6 .

In the embodiment, the bus bar unit 200 coupled to the first module case 310 includes a bus bar frame 211 , a bus bar circuit board 212 , a first bus bar terminal 213a , and a second bus bar terminal ( 213b). The first bus bar terminal 213a and the second bus bar terminal 213b may be positioned to be coupled to the first bus bar accommodating part 313a and the second bus bar accommodating part 313b, respectively.

The coupling protrusion 312 in the first module case 310 may include a coupling body portion 312a and a coupling groove 312b, and a predetermined fixing part 312B such as a bolt connects the coupling groove 312b. Through this, the battery module assembly 1000 may be fixed.

In this case, in the embodiment, the wireless cell sensing unit 410 may include a sensing unit body 412 and a sensing antenna 411 , and the wireless cell sensing unit 410 is based on the case body side surface 311S. As a result, the first bus bar accommodating part end 313ae and the second bus bar accommodating part end 313be may be disposed lower.

For example, the wireless cell sensing unit 410 is located on the side of the case body rather than the imaginary second straight line S2 connecting the first bus bar receiving end 313ae and the second bus bar receiving end 313be. It may be disposed lower than the second straight line S2 based on 311S.

According to the embodiment, the wireless cell sensing unit 410 is disposed lower than the first bus bar accommodating part end 313ae and the second bus bar accommodating part end 313be with respect to the case body side surface 311S. Accordingly, since the first bus bar accommodating part 313a and the second bus bar accommodating part 313 are seated inside, a predetermined fixing part 312B, such as a bolt, for fixing or separating the battery module to the battery pack lower case. Even if the operation is in progress, since it is spaced apart from the wireless cell sensing unit 410 itself, physical and mechanical pressure or impact is not applied, so there is a special technical effect that can provide a stable and reliable structure.

In addition, according to the embodiment, the wireless cell sensing unit 410 is directly engaged with the module PCB of each battery module while seated inside the first bus bar receiving part 313a and the second bus bar receiving part 313 . Unlike the prior art, there is no need for a separate wired wire between the battery module and the CMU. Also, since the wireless cell sensing unit can communicate wirelessly with the BMS ECU, the CMUs are connected to each battery module by wire, resulting in complicated wiring problems and wiring problems. There is a special technical effect that can solve the problem of the disconnection problem and the problem of increasing the volume by CMUs in a complex way.

In addition, according to the embodiment, the wireless cell sensing unit 410 is mounted on the inside of the first bus bar accommodating part 313a and the second bus bar accommodating part 313 in the wireless cell sensing unit in each battery module. When replacing the wireless cell sensing unit in case of an error, there is a special technical effect that A/S can be performed by quickly and efficiently replacing only the faulty non-sensing cell sensing unit without having to separate other components.

Next, FIG. 10 is an exemplary view of the electric vehicle 2000 in which the battery system assembly 2100 including the battery module assembly 1000 according to the embodiment is mounted.

The battery module assembly 1000 of the embodiment may be charged or discharged by the inverter 2300 according to the driving of the motor 2400 and/or the internal combustion engine, and the state of the vehicle is controlled through the ECU 2200 which is an electronic control device. can be

The battery module assembly according to an embodiment of the present invention may be applied to a vehicle such as an electric vehicle or a hybrid vehicle.

As described above, although the present invention has been described with reference to limited embodiments and drawings, the present invention is not limited thereto, and the technical idea of the present invention and the following by those skilled in the art to which the present invention pertains. It goes without saying that various modifications and variations are possible within the scope of equivalents of the claims to be described. Meanwhile, although terms indicating directions such as up, down, left, and right are used in the present specification, these terms are only for convenience of description, and may vary depending on the location of the target object or the position of the observer. It is obvious to those skilled in the art.

Claims (7)

a module case including a sensing slot through which one side is penetrated and covering a predetermined battery module;
a bus bar unit that fixes the battery module and is electrically connected; and
It includes; a wireless cell sensing unit that can be detached from the module case and can be integrated.
The module case includes a first module case and a second module case disposed on the front and rear surfaces of the battery module, respectively, a third module case disposed on the side surface and the upper surface of the battery module, and a third positioned on the bottom of the battery module Includes 4 module case,
The wireless cell sensing unit,
The first module case itself is detachably mounted and integrated through the sensing slot passing through the first module case, and is electrically connected to the bus bar unit in direct contact with it,
The wireless cell sensing unit includes a sensing unit body and a sensing antenna disposed on the sensing unit body, wherein an upper portion of the sensing antenna is positioned higher than an upper surface of the case body of the first module case. . According to claim 1,
The first module case,
The case body, a coupling protrusion protruding in a first direction from a first area of the case body, first and second bus bar accommodating parts protruding in the first direction from a second area of the case body, and the first , and the sensing slot in the form of a hole penetrated between the second bus bar accommodating parts,
The sensing unit body of the wireless cell sensing unit mounted on the first module case itself does not protrude from the side of the case body of the first module case in which the sensing slot is disposed. The method of claim 1,
The first module case,
The case body, a coupling protrusion protruding in a first direction from a first area of the case body, first and second bus bar accommodating parts protruding in the first direction from a second area of the case body, and the first , the sensing slot in the form of a hole penetrated between the second bus bar accommodating part;
The bus bar unit coupled to the first module case,
a bus bar frame, a bus bar circuit board disposed on one surface of the bus bar frame, a first bus bar terminal electrically connected to the bus bar circuit board and coupled to the bus bar frame, and a second bus bar terminal;
The first bus bar terminal and the second bus bar terminal are respectively coupled to the first bus bar accommodating part and the second bus bar accommodating part and positioned. 4. The method of claim 3,
The wireless cell sensing unit is
The battery module assembly according to claim 1, wherein the end of the first bus bar terminal and the end of the second bus bar terminal are lower than the end of the first bus bar terminal with respect to the side surface of the case body. 4. The method of claim 3,
The wireless cell sensing unit is
The battery module assembly according to claim 1, wherein the first straight line connecting the end of the first bus bar terminal and the end of the second bus bar terminal is lower than the first straight line with respect to the side of the case body. 4. The method of claim 3,
The wireless cell sensing unit is
The battery module assembly according to claim 1, wherein the second straight line connecting the end of the first bus bar accommodating part and the end of the second bus bar accommodating part is lower than the second straight line with respect to the side of the case body. A battery system assembly comprising a battery module assembly and a battery controller according to any one of claims 1 to 6.

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