Battery assembly

Abstract

The utility model discloses a battery assembly which comprises battery cells and a circuit board integrated with temperature sensors, at least one end of each battery cell is provided with the circuit board, and each temperature sensor is connected with one battery cell and used for collecting temperature data of the battery cell. According to the utility model, the circuit board is arranged at one end of the battery cell, and the temperature sensor on the circuit board is connected with the battery cell and acquires the temperature data of the battery cell, so that the temperature of the battery cell can be monitored in real time, and a worker can take corresponding control measures according to the temperature of the battery cell. Moreover, the circuit board is positioned at the end part of the battery cell, so that the circuit board is not influenced by the size of the battery cell and can adapt to the battery cells with different sizes; even in a multi-series and multi-parallel storage battery pack, each temperature sensor corresponds to one battery cell by changing the number of the temperature sensors on the circuit board, and a clamp does not need to be designed independently, so that the production cost can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery assembly. Background Art

[0002] In existing battery management systems, battery temperature monitoring is a critical step in ensuring safe operation and extending battery life. This is especially true for cylindrical nickel-metal hydride batteries, which generate heat during the charging and discharging process. Excessive temperatures can lead to performance degradation and even safety incidents. Therefore, real-time monitoring of battery temperature and the implementation of appropriate control measures are crucial.

[0003] Currently, a common temperature acquisition method involves installing a temperature probe in a dedicated plastic clip, which is then secured to the center of the cylindrical battery's circumference. This method allows for relatively accurate measurement of the battery's surface temperature. However, this method requires the development of specialized clips for different NiMH cylindrical battery sizes, which undoubtedly increases production costs. This is especially true when multiple battery packs are connected in series or parallel, as each battery size requires a dedicated clip, further increasing costs. Utility Model Content

[0004] The embodiment of the present invention provides a battery assembly to solve the problem that batteries of different sizes and multi-string and multi-parallel battery packs all need to develop dedicated clips, thereby achieving the effect of reducing production costs.

[0005] Specifically, the present invention provides a battery assembly, including a battery cell and a circuit board integrated with a temperature sensor, wherein the circuit board is provided at at least one end of the battery cell, and each temperature sensor is connected to one of the battery cells for collecting temperature data of the battery cell.

[0006] Optionally, the temperature sensor and the battery core are connected via thermally conductive silica gel.

[0007] Optionally, the temperature sensor is located on a side of the circuit board close to the battery cell, and the distance between the temperature sensor and the battery cell is 1-2 mm.

[0008] Optionally, a glue injection hole is provided on the circuit board, and the glue injection hole is located on one side of the temperature sensor; the glue injection hole is provided in a one-to-one correspondence with the temperature sensor.

[0009] Optionally, the battery cell includes a shell, on which a positive electrode post and a negative electrode post are provided; each of the temperature sensors is connected to one of the positive electrode post or the negative electrode post.

[0010] Optionally, the battery assembly further includes a connector and a battery management system, wherein the connector is used to connect the battery management system and the temperature sensor to transmit temperature data collected by the temperature sensor to the battery management system.

[0011] Optionally, the battery management system has a temperature processing module and an alarm module, the temperature processing module is used to compare the temperature data with a preset value; the alarm module is used to issue a warning signal when the temperature data exceeds the preset value.

[0012] Optionally, there are multiple battery cells, and the multiple battery cells are arranged in an array along the length direction and the width direction of the circuit board; the temperature sensors are arranged in a one-to-one correspondence with the battery cells.

[0013] Optionally, the temperature sensor is a chip thermistor.

[0014] Optionally, the temperature sensor is mounted on a circuit board using surface mounting technology.

[0015] The beneficial effects of the present invention are:

[0016] The battery assembly provided by this utility model comprises a circuit board disposed at one end of a battery cell. A temperature sensor on the circuit board is connected to the battery cell and collects temperature data from the battery cell, thereby enabling real-time monitoring of the battery cell temperature and facilitating the implementation of appropriate control measures based on the battery cell temperature. Furthermore, since the circuit board is located at the end of the battery cell, it is unaffected by the size of the battery cell and can accommodate batteries of varying sizes. Even in a multi-series and multi-parallel battery pack, each temperature sensor can be assigned to a specific battery cell by varying the number of temperature sensors on the circuit board, eliminating the need for a separate design clip and thus reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0018] Figure 1 This is a schematic structural diagram of a battery assembly in one embodiment of the present utility model;

[0019] Figure 2 It is a schematic partial cross-sectional view of a battery assembly in one embodiment of the present invention.

[0020] In the figure: 100, battery cell, 200, circuit board, 210, temperature sensor, 220, glue injection hole, 300, thermal conductive silicone, 400, connector. DETAILED DESCRIPTION

[0021] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0022] In the description of the present invention, it should be understood that the terms "longitudinal," "radial," "length," "width," "thickness," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0023] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary, such as by glue injection between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0024] Figure 1 This is a schematic structural diagram of a battery assembly in one embodiment of the present invention. Figure 1 As shown, and reference Figure 2 An embodiment of the present invention provides a battery assembly, including a battery cell 100 and a circuit board 200 integrated with a temperature sensor 210, wherein the circuit board 200 is bonded to at least one end of the battery cell 100, and each temperature sensor 210 is connected to one battery cell 100 for collecting temperature data of the battery cell 100.

[0025] The embodiment of the present invention provides a circuit board 200 at one end of a battery cell 100. The temperature sensor 210 on the circuit board 200 is connected to the battery cell 100 and collects temperature data of the battery cell 100, thereby enabling real-time monitoring of the temperature of the battery cell 100 and facilitating the implementation of appropriate control measures based on the temperature of the battery cell 100. Furthermore, because the circuit board 200 is located at the end of the battery cell 100, it is unaffected by the size of the battery cell 100 and can accommodate battery cells 100 of varying sizes. Even in a multi-series and multi-parallel battery pack, each temperature sensor 210 can be aligned with a single battery cell 100 by varying the number of temperature sensors 210 on the circuit board 200, eliminating the need for a separate clip design and thus reducing production costs.

[0026] In one embodiment of the present invention, the temperature sensor 210 is connected to the battery cell 100 via a thermally conductive silicone rubber 300. This arrangement not only allows the temperature sensor 210 and the battery cell 100 to be bonded and fixed via the thermally conductive silicone rubber 300, but also allows the thermal conductivity of the thermally conductive silicone rubber 300 to transfer heat from the battery cell 100 to the temperature sensor 210, thereby ensuring the temperature sensor 210 is in good working order.

[0027] In one embodiment of the present invention, the temperature sensor 210 is located on the side of the circuit board 200 closest to the battery cell 100, and is 1-2 mm away from the battery cell 100. If the distance between the temperature sensor 210 and the battery cell 100 is too large, the thermally conductive silicone 300 becomes thicker, extending the heat transfer distance and affecting heat transfer efficiency. If the distance between the temperature sensor 210 and the battery cell 100 is too small, the thermally conductive silicone 300 becomes thinner, which can easily affect the stability of the connection between the temperature sensor 210 and the battery cell 100.

[0028] In one embodiment of the present utility model, a glue injection hole 220 is provided on the circuit board 200, and the glue injection hole 220 is located on one side of the temperature sensor 210. The glue injection hole 220 is arranged in a one-to-one correspondence with the temperature sensor 210, so that thermal conductive silicone 300 can be injected between the temperature sensor 210 and the battery cell 100 through the glue injection hole 220. After the thermal conductive silicone 300 is cured, the temperature sensor 210 and the battery cell 100 can be bonded and fixed.

[0029] In one embodiment of the present invention, the battery cell 100 includes a housing, on which a positive electrode post and a negative electrode post are provided; each of the temperature sensors 210 is connected to one of the positive electrode post or the negative electrode post to collect the temperature at the positive electrode post or the negative electrode post of the battery cell 100. There are multiple battery cells 100, and the multiple battery cells 100 are arranged in an array along the length and width directions of the circuit board 200; the temperature sensors 210 are arranged in a one-to-one correspondence with the battery cells 100 to perform one-to-one temperature collection for all battery cells 100 in the battery pack; alternatively, thermal conductive silicone 300 is not provided between some temperature sensors 210 and the battery cells 100, and temperature data is not collected, so as to achieve selective collection. The multiple battery cells 100 are fixed by a bracket, and the circuit board can also be connected to the bracket to increase the stability of the connection.

[0030] In one embodiment of the present invention, the temperature sensor 210 is a chip thermistor. The temperature sensor 210 is mounted on the circuit board 200 using surface mount technology. During use, the resistance of the chip thermistor increases with increasing temperature. Therefore, the resistance value can be converted to RT and compensated to obtain the temperature value of the corresponding battery cell 100.

[0031] like Figure 2 As shown, the battery assembly also includes a connector 400 and a battery management system. The connector 400 is used to connect the battery management system and the temperature sensor 210 to transmit the temperature data collected by the temperature sensor 210 to the battery management system. Furthermore, the battery management system has a temperature processing module and an alarm module. The temperature processing module is used to compare the temperature data with a preset value; the alarm module is used to issue a warning signal when the temperature data exceeds the preset value.

[0032] In this embodiment, each temperature sensor 210 is connected to a connector 400 to transmit the collected temperature data (resistance value) to the battery management system via the connector 400. The battery management system's temperature processing module performs RT conversion and compensation calculations on the resistance value to obtain the temperature value of the corresponding battery cell 100. This temperature value is then compared with preset values ​​(including a safety temperature threshold and a healthy temperature threshold). If the temperature value exceeds the preset value, the control alarm module issues a warning signal and displays the battery location number, prompting the user to perform maintenance and confirm the battery pack. The safety temperature threshold is used to ensure that the battery operates within a safe operating range. When the temperature of a battery cell 100 exceeds the safety temperature threshold, the battery cell 100 is protected by measures such as reducing the charge or discharge power or shutting down the battery output. The healthy temperature threshold is used to assess the health of the battery cell 100. If the temperature of the battery cell 100 remains above or below the healthy temperature threshold for a long period of time, it may indicate a potential problem with the battery cell 100. For example, overheating or overcooling may lead to performance degradation or shortened battery life.

[0033] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention, and should all be included in the scope of protection of the present invention.

Claims

1. A battery assembly, characterized in that: The invention comprises a battery cell (100) and a circuit board (200) integrated with a temperature sensor (210), wherein the circuit board (200) is provided at least at one end of the battery cell (100), and each temperature sensor (210) is connected to one battery cell (100) and is used to collect temperature data of the battery cell (100).

2. The battery assembly according to claim 1, wherein: The temperature sensor (210) and the battery core (100) are connected via thermally conductive silica gel (300).

3. The battery assembly according to claim 2, wherein: The temperature sensor (210) is located on a side of the circuit board (200) close to the battery core (100), and the distance between the temperature sensor and the battery core (100) is 1-2 mm.

4. The battery assembly according to claim 2, wherein: The circuit board (200) is provided with a glue injection hole (220), and the glue injection hole (220) is located on one side of the temperature sensor (210); the glue injection hole (220) and the temperature sensor (210) are provided in a one-to-one correspondence.

5. The battery assembly according to claim 1, wherein: The battery cell (100) comprises a shell, on which a positive electrode post and a negative electrode post are provided; each of the temperature sensors (210) is connected to one of the positive electrode post or the negative electrode post.

6. The battery assembly according to claim 1, wherein: The battery assembly further comprises a connector (400) and a battery management system, wherein the connector (400) is used to connect the battery management system and the temperature sensor (210) to transmit temperature data collected by the temperature sensor (210) to the battery management system.

7. The battery assembly according to claim 6, characterized in that The battery management system comprises a temperature processing module and an alarm module. The temperature processing module is used to compare the temperature data with a preset value; the alarm module is used to issue an early warning signal when the temperature data exceeds the preset value.

8. The battery assembly according to claim 1, wherein: There are a plurality of battery cells (100), and the plurality of battery cells (100) are arranged in an array along the length direction and the width direction of the circuit board (200); and the temperature sensors (210) are arranged in a one-to-one correspondence with the battery cells (100).

9. The battery assembly according to claim 1, wherein: The temperature sensor (210) is a chip thermistor.

10. The battery assembly according to claim 9, characterized in that The temperature sensor (210) is mounted on the circuit board (200) using surface mounting technology.

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