Pouch battery and battery pack
By introducing a wireless transmission module and acquisition board into the pouch battery, the problems of complex wiring and heavy weight of pouch batteries are solved, achieving structural simplification, weight reduction and energy density improvement, and enhancing the data support capabilities of the battery management system.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- SUNWODA MOBILITY ENERGY TECHNOLOGY CO LTD
- Filing Date
- 2025-12-03
- Publication Date
- 2026-07-09
AI Technical Summary
The use of wired BMS for pouch batteries results in complex wiring, heavy weight, and space consumption.
The system uses a wireless transmission module and acquisition board to transmit cell data wirelessly, simplifying the wiring structure, reducing weight, and minimizing space occupation.
It achieves structural simplification, weight reduction, space reduction, increased energy density, and enhanced data support capabilities of the battery management system.
Smart Images
Figure CN2025139861_09072026_PF_FP_ABST
Abstract
Description
Soft-pack batteries and battery packs
[0001] This application claims priority to Chinese patent application No. 202520006748.6, filed on January 2, 2025, entitled "Soft-pack Battery and Battery Pack", the entire contents of which are incorporated herein by reference. Technical Field
[0002] This application relates to the field of power battery technology, and in particular to a soft-pack battery and battery pack. Background Technology
[0003] Due to their small cell size, low pack efficiency, and high manufacturing difficulty, pouch batteries have become a less popular choice for automakers. However, with technological advancements, there have been recent breakthroughs in pouch battery pack assembly. Pouch batteries are now making significant progress in their proportion within battery packs through module-less assembly methods, resulting in a substantial increase in pack efficiency and their gradual widespread application in the electric vehicle industry.
[0004] With the rapid development of the electric vehicle industry, the Battery Management System (BMS), as a core component of power batteries, undertakes the critical tasks of ensuring battery safety, extending battery life, and optimizing battery performance. Battery packs typically use wired BMSs, with cables running between pouch cells and between pouch cells and control devices. Information is transmitted and collected through these cables, resulting in complex wiring, heavy weight, and space consumption. Summary of the Invention
[0005] The main purpose of this application is to propose a pouch battery that aims to solve the technical problems of current pouch batteries using wired BMS, which involve complex wiring, heavy weight, and space occupation.
[0006] To achieve the above objectives, this application proposes a pouch battery having a first direction and a third direction intersecting each other, the pouch battery comprising:
[0007] A housing, the housing comprising a body portion and an encapsulation portion, the encapsulation portion being connected to the body portion in the third direction;
[0008] A battery cell, comprising an electrode assembly, a positive tab, and a negative tab, wherein the electrode assembly is disposed within the body portion, the positive tab and the negative tab are both connected to the electrode assembly, and the positive tab and the negative tab are located on the same side of the electrode assembly in the third direction, and the positive tab and the negative tab are both inserted through the encapsulation portion in the third direction and extend to the outside of the encapsulation portion;
[0009] A data acquisition board is disposed in the packaging section. The data acquisition board has a data acquisition module and a wireless transmission module. The data acquisition module is electrically connected to both the positive and negative tabs, and the wireless transmission module is electrically connected to the data acquisition module.
[0010] In some embodiments, the positive electrode tab and the negative electrode tab are spaced apart in the first direction, and the acquisition plate is located between the positive electrode tab and the negative electrode tab in the first direction.
[0011] In some embodiments, the pouch cell further has a second direction perpendicular to the first direction and the third direction, and the thickness of the encapsulation portion in the second direction is less than the thickness of the area of the housing corresponding to the electrode assembly in the second direction.
[0012] In some embodiments, the encapsulation portion is located at the edge of the housing.
[0013] In some embodiments, the acquisition board is disposed on the outer surface of the encapsulation portion;
[0014] The acquisition board also has a first wire and a second wire, the first wire being electrically connected to the positive electrode and the acquisition module, and the second wire being electrically connected to the negative electrode and the acquisition module.
[0015] In some embodiments, the acquisition board is bonded to the outer surface of the encapsulation portion;
[0016] A portion of the first wire is adhered to the outer surface of the package portion, and the first wire is electrically connected to the positive electrode tab extending outside the housing;
[0017] A portion of the second wire is adhered to the outer surface of the package, and the second wire is electrically connected to the negative electrode tab extending outside the housing.
[0018] In some embodiments, the acquisition board is disposed within the packaging section;
[0019] The acquisition board also has a first wire and a second wire, the first wire being electrically connected to the positive electrode and the acquisition module, and the second wire being electrically connected to the negative electrode and the acquisition module.
[0020] In some embodiments, the acquisition board further has a third wire electrically connected to the acquisition module, one of the positive electrode and the negative electrode is provided with the acquisition board and electrically connected to the acquisition module, and the other is electrically connected to the third wire.
[0021] In some embodiments, the positive electrode tab is provided with the acquisition board and is electrically connected to the acquisition module, and the acquisition board is electrically connected to the negative electrode tab through the third wire.
[0022] In some embodiments, the negative electrode tab is provided with the acquisition board and is electrically connected to the acquisition module, and the acquisition board is electrically connected to the positive electrode tab through the third wire.
[0023] In some embodiments, the acquisition module includes a first acquisition unit, a second acquisition unit, and a fourth wire. The first acquisition unit is disposed on the positive electrode tab and electrically connected to the positive electrode tab. The second acquisition unit is disposed on the negative electrode tab and electrically connected to the negative electrode tab. The fourth wire is electrically connected to the first acquisition unit and the second acquisition unit.
[0024] In some embodiments, both the positive electrode tab and the negative electrode tab are provided with an insulating layer, which covers the acquisition module.
[0025] In some embodiments, the insulating layer comprises a polyimide layer or a polyester layer.
[0026] In some embodiments, at least a portion of the insulating layer is located outside the housing; and / or, the acquisition module further includes a temperature acquisition unit.
[0027] This application also proposes a battery pack comprising a pouch cell battery as described above.
[0028] In the soft-pack battery of this application, the acquisition board collects data information (such as voltage, current, etc.) of the battery cell through the acquisition module, and transmits the collected data information to external devices through the wireless transmission module. This can provide strong data support for the status assessment, fault diagnosis and predictive maintenance of the soft-pack battery, eliminate the need for wired cables, simplify the structure, reduce weight, reduce space occupation and improve energy density. Attached Figure Description
[0029] Figure 1 is a schematic diagram of the structure of a soft-pack battery in one embodiment of this application;
[0030] Figure 2 is a schematic diagram of the structure of a soft-pack battery in another embodiment of this application;
[0031] Figure 3 is a schematic diagram of the structure of a soft-pack battery in another embodiment of this application;
[0032] Figure 4 is a schematic diagram of the structure of a pouch battery in another embodiment of this application. Detailed Implementation
[0033] The solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments in this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.
[0034] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.
[0035] It should also be noted that when a component is described as "fixed to" or "set on" another component, it can be directly on the other component or there may be an intervening component present. When a component is described as "connected to" another component, it can be directly connected to the other component or there may be an intervening component present.
[0036] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.
[0037] Referring to Figure 1, which is a schematic diagram of the structure of a pouch battery in one embodiment of this application.
[0038] This application provides a pouch battery, as shown in Figure 1. The pouch battery has a first direction X and a third direction Z that intersect each other in pairs. The pouch battery includes:
[0039] The housing 110 includes a body part and an encapsulation part 111, and the encapsulation part 111 is connected to the body part in the third direction Z.
[0040] The battery cell 120 includes an electrode assembly 121, a positive electrode tab 122, and a negative electrode tab 123. The electrode assembly 121 is disposed inside the encapsulation portion 111. The positive electrode tab 122 and the negative electrode tab 123 are both connected to the electrode assembly 121. The positive electrode tab 122 and the negative electrode tab 123 are located on the same side of the electrode assembly 121 in the third direction Z. The positive electrode tab 122 and the negative electrode tab 123 are both disposed in the encapsulation portion 111 in the third direction Z and extend to the outside of the encapsulation portion 111.
[0041] The acquisition board 130 is located in the packaging section 111. The acquisition board 130 has an acquisition module 131 and a wireless transmission module 132. The acquisition module 131 is electrically connected to the positive tab 122 and the negative tab 123. The wireless transmission module 132 is electrically connected to the acquisition module 131.
[0042] As the basic unit of a battery pack, a pouch battery is a type of battery that encapsulates battery components such as positive and negative electrode materials, separators, and electrolytes within a flexible packaging material (such as aluminum-plastic film). Visually, pouch batteries are flat and, due to their flexibility, possess a certain degree of deformability. They can also be customized to meet the specific needs of different devices, resulting in various shapes and sizes to fully utilize the internal space of the equipment.
[0043] As shown in Figure 1, the pouch battery has a first direction X and a third direction Z. The first direction X is perpendicular to the third direction Z. The first direction X can be the length direction of the pouch battery, and the third direction Z can be the height direction of the pouch battery. In addition, the pouch battery can also have a second direction Y, which is perpendicular to both the first direction X and the third direction Z. The second direction Y can be the width / thickness direction of the pouch battery.
[0044] In some embodiments, the casing 110 is a key encapsulation material for the pouch battery. The casing 110 can be an aluminum-plastic film, generally a multi-layer composite material, which has good barrier properties, preventing external moisture, oxygen, etc. from entering the battery interior, and also preventing electrolyte leakage. The casing 110 includes a body portion and an encapsulation portion 111 connected to the body portion in the third direction Z. The electrode assembly 121 of the cell 120 is housed within the body portion, and the encapsulation portion 111 and the electrode assembly 121 are arranged adjacent to each other in the third direction Z. The electrode assembly 121 can be a wound structure formed by stacking and winding a positive electrode sheet, a separator, and a negative electrode sheet. The separator is located between the positive and negative electrode sheets, and its main function is to prevent direct contact between the positive and negative electrodes, which could lead to a short circuit, while allowing ions to pass freely between the positive and negative electrodes. On the third direction Z of the pouch battery, the positive tab 122 and the negative tab 123 are both located on the same side of the electrode assembly 121. The positive tab 122 corresponds to the positive electrode plate of the electrode assembly 121 and is connected by welding or integral installation, while the negative tab 123 corresponds to the negative electrode plate of the electrode assembly 121 and is connected by welding or integral installation. The casing 110 also contains an electrolyte, which serves as a medium for ion transport to ensure the conduction of ions inside the battery.
[0045] In some embodiments, the acquisition module 131 of the acquisition board 130 is used to acquire data information of the battery cell 120, such as voltage and current. After the acquisition module 131 acquires the data information of the battery cell 120, the wireless transmission module 132 can transmit it to an external device. The acquisition board 130 can be a circuit board with corresponding circuits for transmitting and processing the acquired data information. The acquisition module 131 may include components for acquiring current and / or voltage information of the battery cell 120 to monitor the working status of the battery cell 120. In addition, the acquisition module 131 may also include other acquisition devices, such as temperature acquisition devices, pressure acquisition devices, etc., for correspondingly acquiring temperature information, pressure information, etc. of the battery cell 120. The acquisition board 130 can be disposed outside the housing or inside the housing 110, including but not limited to these. This embodiment does not limit the placement of the acquisition board 130.
[0046] In the pouch battery of this application, the acquisition board 130 acquires data information (such as voltage, temperature, pressure, etc.) from the cell 120 through the acquisition module 131, and transmits the acquired data information to an external device through the wireless transmission module 132. In this way, it can provide strong data support for the condition assessment, fault diagnosis and predictive maintenance of the pouch battery, eliminate the need for cables, simplify the structure, reduce weight and space occupation.
[0047] In some embodiments, as shown in FIG1, the positive electrode tab 122 and the negative electrode tab 123 are spaced apart in the first direction X, and the acquisition plate 130 is located between the positive electrode tab 122 and the negative electrode tab 123 in the first direction X.
[0048] During the assembly of the pouch battery, after the electrode assembly 121 of the cell 120 is placed into the housing 110, the electrode assembly 121 is encapsulated by the encapsulation part 111. The positive electrode tab 122 and the negative electrode tab 123 pass through the encapsulation part 111 and extend to the outside of the housing 110. As shown in Figure 1, the encapsulation part 111 is the part that seals the housing 110 after the electrode assembly 121 is inserted. The encapsulation part 111 is arranged adjacent to the electrode assembly 121 in the third direction Z, and will not be described in detail further.
[0049] Since the encapsulation section 111 seals the housing 110, the area of the housing 110 corresponding to the electrode assembly 121 is thinner in the thickness direction. By placing the acquisition board 130 in the encapsulation section 111, the size of the soft-pack battery in the thickness direction can be increased without additionally increasing the size of the soft-pack battery, thus saving space.
[0050] The encapsulation part 111 is located at the edge of the housing 110 and is a key part for encapsulating and sealing the internal components of the battery, ensuring that the electrolyte will not leak and that the external environment will not have an adverse effect on the internal components of the battery.
[0051] On the third direction Z of the pouch battery, one end of the positive tab 122 is inside the housing 110 and electrically connected to the electrode assembly 121, while the other end of the positive tab 122 extends through the encapsulation portion 111 of the housing 110 to the outside of the housing 110. One end of the negative tab 123 is inside the housing 110 and electrically connected to the electrode assembly 121, while the other end of the negative tab 123 extends through the encapsulation portion 111 of the housing 110 to the outside of the housing 110. During the passage of the positive and negative tabs through the encapsulation portion 111, a special encapsulation process is used to ensure that the sealing of the encapsulation portion 111 is not compromised. For example, sealant is used to tightly adhere to the encapsulation portion 111 material to prevent electrolyte leakage. The positive and negative tabs serve as a bridge connecting the internal electrodes of the battery to the external circuitry, and can be connected to external wires or circuit boards through welding or other methods to achieve the charging and discharging function of the battery.
[0052] The acquisition board 130 is mounted at the encapsulation section 111, without interfering with the electrode assembly 123, resulting in a compact structure. Furthermore, in the first direction X of the pouch battery, the acquisition board 130 is located between the positive tab 122 and the negative tab 123, closer to the tabs, allowing for shorter electrical connections. In a compact pouch battery design, shorter connections reduce electromagnetic interference and signal attenuation, resulting in more stable and accurate signal transmission, which is beneficial for the battery management system to accurately monitor and control the battery status. In this embodiment, by rationally arranging the installation positions of the positive tab 122, the negative tab 123, and the acquisition board 130, the space of the encapsulation section 111 is fully utilized to install the acquisition board 130, allowing the pouch battery to accommodate more active material within a limited volume, increasing the battery's energy density, and facilitating the application of pouch batteries in space-constrained applications.
[0053] The acquisition board 130 can be disposed on the outer surface of the packaging section 111 or on the inner side of the packaging section 111, for example:
[0054] In some embodiments, as shown in FIG1, the acquisition board 130 is disposed on the outer surface of the encapsulation portion 111; the acquisition board 130 also has a first wire 133 and a second wire 134, the first wire 133 being electrically connected to the positive electrode tab 122 and the acquisition module 131, and the second wire 134 being electrically connected to the negative electrode tab 123 and the acquisition module 131.
[0055] The data acquisition board 130 is located on the outer surface of the encapsulation section 111. When the data acquisition board 130 malfunctions or becomes abnormal, maintenance personnel can directly access it for easy inspection, repair, and replacement. Furthermore, the data acquisition board 130 can better exchange heat with the external environment during operation, improving its stability and reliability. In addition, the data acquisition board 130 is equipped with a first wire 133 and a second wire 134. The data acquisition module 131 of the data acquisition board 130 is electrically connected to the positive electrode tab 122 via the first wire 133, enabling the acquisition of current and / or voltage information at the positive terminal. It is also electrically connected to the negative electrode tab 123 via the second wire 134, enabling the acquisition of current and / or voltage information at the negative terminal. This allows for precise monitoring of the current and / or voltage data of the battery cell 120. If the voltage of the battery cell 120 is too high or too low, the battery management system can take measures such as cutting off the charging or discharging circuit to prevent overcharging or over-discharging of the battery cell 120, thereby avoiding safety accidents such as thermal runaway, combustion, and explosion.
[0056] In some embodiments, as shown in FIG1, the acquisition plate 130 is bonded to the outer surface of the encapsulation portion 111; a portion of the first wire 133 is bonded to the outer surface of the encapsulation portion 111, and the first wire 133 is electrically connected to the positive electrode tab 122 extending out of the housing 110; a portion of the second wire 134 is bonded to the outer surface of the encapsulation portion 111, and the second wire 134 is electrically connected to the negative electrode tab 123 extending out of the housing 110.
[0057] Specifically, the acquisition board 130 is fixed to the outer surface of the encapsulation portion 111 by adhesive bonding, which facilitates assembly and ensures stable installation. Furthermore, the first wire 133 and the second wire 134 are fixed to the encapsulation portion 111 by adhesive bonding, improving wiring stability and ensuring signal transmission stability. In some embodiments, before bonding the acquisition board 130 and the wires, the outer surface of the encapsulation portion 111 can be cleaned to remove oil, dust, and other impurities. Plasma cleaning technology is used to increase the surface micro-roughness, improving adhesive adhesion. The adhesive can be a high-temperature resistant, high-insulation, high-strength adhesive with good flexibility, such as a silicone adhesive. After curing, it can withstand the temperature range of the pouch battery during operation (generally -20°C to 80°C, and -40°C to 120°C under extreme conditions), while effectively isolating moisture and dust to prevent short circuits in the acquisition board 130 circuit. Its good flexibility can adapt to the slight deformation of the pouch battery under charge-discharge cycles and external stress.
[0058] Referring to Figure 2, which is a schematic diagram of the structure of a pouch battery in another embodiment of this application.
[0059] In some other embodiments, as shown in FIG2, the acquisition board 130 is disposed within the encapsulation portion 111. The acquisition board 130 also has a first wire 133 and a second wire 134, the first wire 133 being electrically connected to the positive electrode tab 122 and the acquisition module 131, and the second wire 134 being electrically connected to the negative electrode tab 123 and the acquisition module 131.
[0060] In other embodiments, the internal environment of the pouch battery is relatively stable. The acquisition board 130, located within the encapsulation section 111, is protected from external physical impacts, dust, and moisture, thereby extending its service life. Furthermore, the acquisition board 130 is equipped with a first wire 133 and a second wire 134. The acquisition module 131 of the acquisition board 130 is electrically connected to the positive electrode tab 122 via the first wire 133, enabling it to acquire current and / or voltage information at the positive terminal. It is also electrically connected to the negative electrode tab 123 via the second wire 134, enabling it to acquire current and / or voltage information at the negative terminal, thus achieving precise monitoring of the battery's current and / or voltage status. If the voltage of the cell 120 is too high or too low, the battery management system can employ measures such as cutting off the charging or discharging circuit to prevent overcharging or over-discharging of the cell 120, thereby avoiding safety accidents such as thermal runaway, combustion, and explosion.
[0061] Referring to Figure 3, which is a schematic diagram of the structure of a pouch battery in another embodiment of this application.
[0062] In some embodiments, as shown in FIG3, the acquisition board 130 further has a third wire 135 electrically connected to the acquisition module 131, one of the positive electrode 122 and the negative electrode 123 is provided with the acquisition board 130 and electrically connected to the acquisition module 131, and the other is electrically connected to the third wire 135.
[0063] In some embodiments, the positive electrode 122 may have a data acquisition board 130 electrically connected to the data acquisition module 131, and the data acquisition board 130 may be electrically connected to the negative electrode 123 via a third wire 135. Alternatively, the negative electrode 123 may have a data acquisition board 130 electrically connected to the data acquisition module 131, and the data acquisition board 130 may be electrically connected to the positive electrode 122 via a third wire 135. In practical applications, either of these two configurations can be selected according to design requirements.
[0064] Specifically, when the acquisition board 130 is located on one of the positive tab 122 and the negative tab 123, it can be thermally fused to the corresponding tab, thereby forming an electrical connection between the acquisition module 131 and the corresponding tab. The acquisition module 131 is also electrically connected to the other of the positive and negative tabs 122 and 123 via a third wire 135, to acquire the current and / or voltage information of the positive and negative electrodes, thereby achieving precise monitoring of the current and / or voltage state of the battery cell 120. If the voltage of the battery cell 120 is too high or too low, the battery management system can take measures such as cutting off the charging or discharging circuit to prevent overcharging or over-discharging of the battery cell 120, thereby avoiding safety accidents such as thermal runaway, combustion, and explosion.
[0065] Referring to Figure 4, which is a schematic diagram of the structure of a pouch battery in another embodiment of this application.
[0066] In some embodiments, as shown in FIG4, the acquisition module 131 includes a first acquisition unit 1311, a second acquisition unit 1312, and a fourth wire 1313. The first acquisition unit 1311 is disposed on and electrically connected to the positive electrode 122, the second acquisition unit 1312 is disposed on and electrically connected to the negative electrode 123, and the fourth wire 1313 is electrically connected to the first acquisition unit 1311 and the second acquisition unit 1312.
[0067] In this embodiment, the acquisition module 131 includes two acquisition units: a first acquisition unit 1311 and a second acquisition unit 1312. The first acquisition unit 1311 and the second acquisition unit 1312 are connected by a fourth wire 1313 to enable data transmission. The first acquisition unit 1311 is located at the positive electrode tab 122 and can acquire the current and / or voltage information of the positive terminal. The second acquisition unit 1312 is located at the negative electrode tab 123 and can acquire the current and / or voltage information of the negative terminal, thereby achieving accurate monitoring of the current and / or voltage status of the battery cell 120. If the voltage of the battery cell 120 is too high or too low, the battery management system can take measures such as cutting off the charging or discharging circuit to prevent the battery cell 120 from being overcharged or over-discharged, thereby avoiding safety accidents such as thermal runaway, combustion, and explosion of the battery.
[0068] In some embodiments, as shown in FIG3, both the positive tab 122 and the negative tab 123 are provided with an insulating layer 140, which covers the acquisition module 131. In this embodiment, the insulating layer 140 provides insulation between the positive tab 122 and the negative tab 123 and between them and other surrounding conductive objects, preventing short circuits caused by direct contact. When the battery is subjected to pressure, impact, or during complex assembly processes, the insulating layer 140 acts as a protective barrier, preventing direct current flow between the positive and negative tabs 123, thereby reducing the risk of serious safety accidents such as battery fires and explosions. Furthermore, the acquisition module 131 is used to acquire key parameters such as battery voltage and current. The insulating layer 140 protects the acquisition module 131, enabling it to acquire signals from inside the battery more accurately and stably, ensuring that the battery management system receives stable and reliable signals for precise charge and discharge control. The insulating layer 140 can be made of insulating materials such as PI (polyimide) and PET (polyester), but is not limited to these.
[0069] In some embodiments, as shown in FIG1, both the positive electrode tab 122 and the negative electrode tab 123 extend in the third direction Z to the outside of the housing 110, and at least a portion of the insulating layer 140 is located outside the housing 110. Additionally, the acquisition module 131 may also include a temperature acquisition unit.
[0070] In some embodiments, on the third direction Z of the pouch battery, the positive tab 122 and the negative tab 123 extend outside the housing 110, providing a convenient interface for connecting to external circuits. Operators can directly connect the battery to external circuits from outside the housing 110 without needing to reach into the complex internal space of the battery, simplifying the circuit connection process. Furthermore, at least a portion of the insulating layer 140 is located outside the housing 110, preventing short circuits caused by contact between the positive and negative tabs 123 or accidental contact of external conductive objects with the tabs 123, thus improving battery safety.
[0071] During charging and discharging, especially at high rates, pouch batteries generate heat. The acquisition module 131 also includes a temperature acquisition unit, which collects temperature information from the battery cell 120 to monitor its temperature in real time. When the temperature rises to a critical value that could lead to thermal runaway, the battery management system can take timely measures based on the signal from the temperature acquisition unit, such as reducing the charging current or activating the cooling system. For example, during fast charging of an electric vehicle, the battery temperature rises rapidly. The temperature acquisition unit in the acquisition module 131 can quickly sense temperature changes, allowing the battery management system to control the charging power to prevent overheating and thermal runaway, thus ensuring the safety of the vehicle and passengers.
[0072] This application also proposes a battery pack, which includes a plurality of pouch batteries as described in the foregoing embodiments. The specific structure of the pouch battery is as described in the foregoing embodiments. Since this battery pack adopts all the technical solutions of all the foregoing embodiments, it has at least all the technical effects brought about by the technical solutions of the foregoing embodiments, and will not be described in detail here.
[0073] The above description is merely an example embodiment of this application. Neither the text nor the drawings should limit the scope of protection of this application. All equivalent structural transformations made using the content of this application's specification and drawings under the overall concept of this application, or direct / indirect applications in other related technical fields, are included within the scope of protection of this application.
Claims
1. A pouch battery having a first direction and a third direction intersecting each other, the pouch battery comprising: A housing, the housing comprising a body portion and an encapsulation portion, the encapsulation portion being connected to the body portion in the third direction; A battery cell, comprising an electrode assembly, a positive tab, and a negative tab, wherein the electrode assembly is disposed within the body portion, the positive tab and the negative tab are both connected to the electrode assembly, and the positive tab and the negative tab are located on the same side of the electrode assembly in the third direction, and the positive tab and the negative tab are both inserted through the encapsulation portion in the third direction and extend to the outside of the encapsulation portion; A data acquisition board is disposed in the packaging section. The data acquisition board has a data acquisition module and a wireless transmission module. The data acquisition module is electrically connected to both the positive and negative tabs, and the wireless transmission module is electrically connected to the data acquisition module.
2. The soft-pack battery according to claim 1, wherein, The positive electrode and the negative electrode are spaced apart in the first direction, and the acquisition board is located between the positive electrode and the negative electrode in the first direction.
3. The soft-pack battery according to claim 2, wherein, The pouch battery also has a second direction, which is perpendicular to the first direction and the third direction, and the thickness of the encapsulation portion in the second direction is less than the thickness of the area of the housing corresponding to the electrode assembly in the second direction.
4. The soft-pack battery according to claim 2, wherein, The encapsulation part is located at the edge of the housing.
5. The pouch cell battery according to claim 2, wherein, The acquisition board is disposed on the outer surface of the encapsulation part; The acquisition board also has a first wire and a second wire, the first wire being electrically connected to the positive electrode and the acquisition module, and the second wire being electrically connected to the negative electrode and the acquisition module.
6. The pouch cell battery according to claim 5, wherein, The acquisition board is bonded to the outer surface of the encapsulation part; A portion of the first wire is adhered to the outer surface of the package portion, and the first wire is electrically connected to the positive electrode tab extending outside the housing; A portion of the second wire is adhered to the outer surface of the package, and the second wire is electrically connected to the negative electrode tab extending outside the housing.
7. The pouch cell battery according to claim 1, wherein, The acquisition board is disposed within the encapsulation section; The acquisition board also has a first wire and a second wire, the first wire being electrically connected to the positive electrode and the acquisition module, and the second wire being electrically connected to the negative electrode and the acquisition module.
8. The pouch battery according to claim 1, wherein, The acquisition board also has a third wire electrically connected to the acquisition module. One of the positive electrode and the negative electrode is provided with the acquisition board and electrically connected to the acquisition module, and the other is electrically connected to the third wire.
9. The pouch cell battery according to claim 8, wherein, The positive electrode is equipped with the acquisition board and is electrically connected to the acquisition module. The acquisition board is electrically connected to the negative electrode via the third wire.
10. The pouch cell battery according to claim 8, wherein, The negative electrode ear is equipped with the acquisition board and is electrically connected to the acquisition module. The acquisition board is electrically connected to the positive electrode ear through the third wire.
11. The pouch cell battery according to claim 1, wherein, The acquisition module includes a first acquisition unit, a second acquisition unit, and a fourth wire. The first acquisition unit is located on the positive electrode and electrically connected to the positive electrode. The second acquisition unit is located on the negative electrode and electrically connected to the negative electrode. The fourth wire is electrically connected to the first acquisition unit and the second acquisition unit.
12. The pouch cell according to claim 8 or 11, wherein, Both the positive and negative electrodes are provided with an insulating layer, which covers the acquisition module.
13. The pouch cell according to claim 12, wherein, The insulating layer includes a polyimide layer or a polyester layer.
14. The pouch cell according to claim 12, wherein, At least a portion of the insulating layer is located outside the housing; and / or, the acquisition module further includes a temperature acquisition unit.
15. A battery pack comprising a pouch cell battery as claimed in any one of claims 1-14.