Temperature acquisition device of lithium battery pack

Abstract

The temperature acquisition device comprises a heat conduction column, a rack and a temperature sensor, the heat conduction column is made of heat conduction materials, a plurality of battery installation positions are formed on the peripheral side of the heat conduction column, and a plurality of arc-shaped walls corresponding to the battery installation positions one by one are formed on the peripheral wall of the heat conduction column. Each arc-shaped wall can be attached to the battery in the corresponding battery mounting position so as to exchange heat with the corresponding battery; the rack comprises a first rack body and a second rack body, the first rack body abuts against one end of the heat conduction column, the second rack body abuts against the other end of the heat conduction column, the first rack body is detachably connected with the second rack body, and the first rack body and the second rack body are both made of heat conduction materials so as to exchange heat with the heat conduction column; the temperature sensor is arranged on the first frame body or the second frame body so as to detect the temperature of the corresponding frame body. According to the technical scheme, the cost of collecting the temperature of the lithium battery pack can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of temperature collection of lithium battery packs, in particular to a temperature collection device for lithium battery packs. Background Art

[0002] In a lithium battery pack, due to the large number of batteries and their dense arrangement, if only a limited number of infrared sensors are used for temperature measurement, it may not be possible to fully cover the temperature changes of all batteries, resulting in incomplete and inaccurate temperature monitoring. In order to better monitor the temperature conditions at various locations in the battery pack and improve the accuracy and comprehensiveness of temperature monitoring, a common practice is to increase the number of infrared sensors to cover more measurement points. However, this will increase the temperature acquisition cost of the lithium battery pack. Therefore, improvements need to be made to this problem. Utility Model Content

[0003] The main purpose of the utility model is to provide a temperature acquisition device for a lithium battery pack, aiming to solve the technical problem that the prior art requires a large number of infrared sensors for temperature acquisition of a lithium battery pack.

[0004] To achieve the above-mentioned purpose, the temperature acquisition device of the lithium battery pack proposed in the utility model includes a heat-conducting column, a frame and a temperature sensor, the heat-conducting column is made of a heat-conducting material, a plurality of battery mounting positions are formed on the peripheral side of the heat-conducting column, a plurality of arc-shaped walls corresponding to the plurality of battery mounting positions are formed on the peripheral wall of the heat-conducting column, each of the arc-shaped walls can be fitted with the battery in the corresponding battery mounting position to exchange heat with the corresponding battery; the frame includes a first frame and a second frame, the first frame abuts against one end of the heat-conducting column, the second frame abuts against the other end of the heat-conducting column, the first frame and the second frame are detachably connected, and the first frame and the second frame are both made of heat-conducting material to exchange heat with the heat-conducting column; the temperature sensor is arranged on the first frame or the second frame to detect the temperature of the corresponding frame.

[0005] In a possible implementation, there are a plurality of heat-conducting columns, which are arranged in an array, and each of the heat-conducting columns abuts against the first frame and the second frame.

[0006] In a possible implementation, the first frame includes a first side wall, and the second frame includes a second side wall;

[0007] The lithium battery pack temperature collection device includes a positive electrode sheet and a negative electrode sheet, wherein the positive electrode sheet is disposed between one end of the heat-conducting column and the first side wall, the positive electrode sheet abuts against the first side wall to exchange heat with the first side wall, and the positive electrode sheet is also electrically connected to the positive electrode of each battery;

[0008] The negative electrode sheet is disposed between the other end of the heat-conducting column and the second side wall. The negative electrode sheet abuts against the second side wall to exchange heat with the second side wall. The negative electrode sheet is also electrically connected to the negative electrode of each battery.

[0009] In a possible implementation, the heat-conducting column includes at least two columns arranged in sequence along its length direction, each of the columns includes a plurality of arc-shaped portions corresponding to the plurality of battery installation positions one by one, and cooperates with at least two arc-shaped portions corresponding to the same battery installation position to form the arc-shaped wall;

[0010] Any two adjacent columns are detachably connected. In the length direction of the heat-conducting column, one of the two columns located at the head and tail ends abuts against the first frame, and the other of the two columns located at the head and tail ends abuts against the second frame.

[0011] In a possible implementation, the number of the columns is two, and the two ends of the two columns that are away from each other are both recessed with grooves, and the bottom walls of the two grooves are penetrated by threaded holes. The temperature collection device of the lithium battery pack includes bolts, and the bolts are respectively threadedly connected to the two threaded holes to fix the two columns together.

[0012] In a possible implementation, two arc-shaped arms are provided on each of the arc-shaped portions, and the arc-shaped arms extend in a direction away from the corresponding arc-shaped portion and are arranged around the corresponding battery mounting position, and each of the arc-shaped arms can abut against the battery in the corresponding battery mounting position.

[0013] The temperature acquisition device of the lithium battery pack of the utility model technical solution enables each battery to abut against the corresponding arc wall, thereby facilitating heat exchange between the battery and the heat-conducting column with high thermal conductivity, and then transferring the heat to the first frame and the second frame through the heat-conducting column. In this way, even if only one temperature sensor is used to detect the temperature of the first frame or the second frame, the temperature condition of the entire battery pack can be reflected more accurately. Compared with the solution of equipping each battery with a temperature sensor, using a single temperature sensor to monitor the temperature of multiple batteries can save sensor costs and simplify system design and installation.

[0014] In addition, by setting thermal conductive columns with high thermal conductivity between multiple batteries, heat transfer between batteries can be promoted, making the temperature change of the entire battery pack more balanced, which can avoid local overheating and improve the overall heat dissipation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0016] Figure 1 This is a schematic structural diagram of an embodiment of a temperature acquisition device for a lithium battery pack of the utility model;

[0017] Figure 2 for Figure 1 An exploded schematic diagram of the temperature acquisition device of the lithium battery pack;

[0018] Figure 3 for Figure 2 Schematic diagram of the heat transfer column;

[0019] Figure 4 for Figure 3 Schematic diagram of the exploded view of the heat transfer column.

[0020] Description of Figure Numbers:

[0021] 1. Thermal conductive column; 11. Battery mounting position; 12. Arc-shaped wall; 13. Column; 131. Arc-shaped portion; 132. Groove; 133. Threaded hole; 134. Arc-shaped arm; 2. Frame; 21. First frame; 211. First side wall; 22. Second frame; 221. Second side wall; 3. Positive electrode sheet; 4. Negative electrode sheet; 5. Bolt.

[0022] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0025] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, "and / or" in the full text includes three solutions. Taking A and / or B as an example, it includes technical solution A, technical solution B, and technical solution that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, which must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0026] The utility model provides a temperature collection device for a lithium battery pack.

[0027] In the embodiment of the present utility model, Figures 1 to 4 As shown, the temperature acquisition device of the lithium battery pack includes a heat-conducting column 1, a frame 2 and a temperature sensor (not shown in the figure), the heat-conducting column 1 is made of a heat-conducting material, and a plurality of battery mounting positions 11 are formed on the peripheral side of the heat-conducting column 1, and a plurality of arcuate walls 12 corresponding to the plurality of battery mounting positions 11 are formed on the peripheral wall of the heat-conducting column 1, and each arcuate wall 12 can be fitted with a battery in a corresponding battery mounting position 11 to exchange heat with the corresponding battery; the frame 2 includes a first frame 21 and a second frame 22, the first frame 21 abuts against one end of the heat-conducting column 1, and the second frame 22 abuts against the other end of the heat-conducting column 1, the first frame 21 and the second frame 22 are detachably connected, and the materials of the first frame 21 and the second frame 22 are both heat-conducting materials to exchange heat with the heat-conducting column 1; the temperature sensor is arranged on the first frame 21 or the second frame 22 to detect the temperature of the corresponding frame.

[0028] To explain specifically, the thermally conductive materials mentioned above include but are not limited to copper, aluminum, copper-based alloys, carbon fiber composites and ceramics, and the temperature sensor can be any one of a thermistor, a thermocouple, a temperature sensor chip, an infrared temperature sensor and a thermal resistor, and symmetry does not make specific restrictions.

[0029] There are many ways to detachably connect the first frame 21 and the second frame 22, such as by snap-on connection, by magnetic connection, by screw fixation, etc., without specific limitation here. Fixing the first frame 21 and the second frame 22 together is mainly to fix the thermal conductive column 1, the battery and other parts, so that the whole device can be used as a portable module.

[0030] It can be understood that the temperature acquisition device of the lithium battery pack of the technical solution of the utility model enables each battery to abut against the corresponding arc wall 12, so as to facilitate heat exchange between the battery and the heat-conducting column 1 with high thermal conductivity, and then transfers the heat to the first frame 21 and the second frame 22 through the heat-conducting column 1. In this way, even if only one temperature sensor is used to detect the temperature of the first frame 21 or the second frame 22, the temperature condition of the entire battery pack can be reflected more accurately. Compared with the solution of equipping each battery with a temperature sensor, using a single temperature sensor to monitor the temperature of multiple batteries can save sensor costs and simplify system design and installation.

[0031] In addition, by arranging heat-conducting columns 1 with high thermal conductivity between multiple batteries, heat transfer between batteries can be promoted, making the temperature change of the entire battery pack more balanced, thus avoiding local overheating and improving the overall heat dissipation effect.

[0032] There are multiple heat-conducting pillars 1 , which are arranged in an array. Each heat-conducting pillar 1 abuts against the first frame 21 and the second frame 22 .

[0033] It can be understood that by increasing the number of heat-conducting columns 1, the device of the present application can accommodate and fix more battery cells, making it easier for the system to collect and analyze the temperature of multiple batteries. At the same time, a reasonable arrangement can ensure that each battery cell can fully participate in heat exchange, effectively reducing the risk of local over-temperature.

[0034] In addition, combined with an intelligent control system, the temperatures of more battery cells can be monitored and controlled by comprehensively considering factors such as the connection positions of each thermal conductive column 1 and the layout of the battery cells. By analyzing the data fed back by different thermal conductive columns 1 through intelligent algorithms, more accurate control of the temperature distribution of the entire battery pack can be achieved.

[0035] The first frame 21 includes a first side wall 211 , and the second frame 22 includes a second side wall 221 ;

[0036] The temperature collection device of the lithium battery pack includes a positive electrode sheet 3 and a negative electrode sheet 4. The positive electrode sheet 3 is arranged between one end of the heat-conducting column 1 and the first side wall 211. The positive electrode sheet 3 abuts against the first side wall 211 to exchange heat with the first side wall 211. The positive electrode sheet 3 is also electrically connected to the positive electrode of each battery.

[0037] The negative electrode sheet 4 is disposed between the other end of the heat-conducting column 1 and the second side wall 221 . The negative electrode sheet 4 abuts against the second side wall 221 to exchange heat with the second side wall 221 . The negative electrode sheet 4 is also electrically connected to the negative electrode of each battery.

[0038] In this way, a physical and electrical connection is established between the positive electrode sheet 3 and the negative electrode sheet 4 and the battery cell, and heat exchange is achieved between the positive and negative electrode sheets 4 and the first and second side walls 221, which helps to achieve heat conduction and dissipation, and is beneficial to improving the accuracy of temperature feedback of the first frame 21 and the second frame 22.

[0039] The heat-conducting column 1 includes at least two columns 13 arranged in sequence along its length direction, each column 13 includes a plurality of arc-shaped portions 131 corresponding to a plurality of battery installation positions 11, and cooperates with at least two arc-shaped portions 131 corresponding to the same battery installation position 11 to form an arc-shaped wall 12;

[0040] Any two adjacent columns 13 are detachably connected. In the length direction of the heat-conducting column 1 , one of the two columns 13 at the head and tail ends abuts against the first frame 21 , and the other of the two columns 13 at the head and tail ends abuts against the second frame 22 .

[0041] Any two adjacent columns 13 can be detachably connected, so that the length of the thermally conductive column 1 can be adjusted according to the length of the battery. The columns 13 at the head and tail ends of the thermally conductive column 1 are respectively abutted against the first frame 21 and the second frame 22. This design can ensure that the column 13 is tightly connected to the entire system, thereby effectively transferring temperature and achieving thermal management.

[0042] The advantage of this design is its strong adaptability, which allows it to flexibly adapt to batteries of different lengths while ensuring thermal conductivity and system stability.

[0043] In specific implementation, in some embodiments, a threaded connection can be made at the connection between the two columns 13 to facilitate the disassembly and reconnection of the two columns 13; in other embodiments, connectors such as spring pins or quick latches can be used to facilitate the disassembly and reconnection of the two columns 13; in still other embodiments, a tenon structure can be designed at the connection between the columns 13 to facilitate quick plug-in and pull-out connections.

[0044] The present application preferentially adopts screw connection to fix two mutually connected columns 13, and preferably adopts a solution with only two columns 13. Specifically, the number of columns 13 is two, and two ends of the two columns 13 that are far away from each other are both recessed with grooves 132, and the bottom walls of the two grooves 132 are penetrated by threaded holes 133. The temperature collection device of the lithium battery pack includes bolts 5, and the bolts 5 are respectively threadedly connected to the two threaded holes 133 to fix the two columns 13 together.

[0045] Specifically, the provision of the groove body 132 will increase the surface area of ​​the column 13, thereby increasing the contact area between the column 13 and the environment. Thus, during the heat transfer process, the heat exchange effect between the column 13 and the surrounding environment will be improved, which will help to dissipate heat faster and avoid the overall temperature of the device being too high. Secondly, the provision of the groove body 132 can reduce the length of the threaded hole 133 that needs to be set, and the threaded hole 133 does not need to be drilled through the two opposite ends of the column 13, which makes it easy to reduce the length of the bolt 5 and save material costs. Finally, the provision of the groove body 132 can reduce the weight of the column 13, making it easier for users to carry and transport the products of this application.

[0046] Two arc-shaped arms 134 are provided on each arc-shaped portion 131. The arc-shaped arms 134 extend in a direction away from the corresponding arc-shaped portion 131 and are arranged around the corresponding battery installation position 11. Each arc-shaped arm 134 can abut against the battery in the corresponding battery installation position 11. The arc-shaped arms 134 abut against the battery in the battery installation position 11, which can keep the position of the battery stable and prevent movement or shaking during transportation or use.

[0047] Since the arc-shaped arm 134 is in direct contact with the battery, it can serve as a bridge for heat conduction, helping to transfer the heat generated by the battery to the column 13, thereby helping the battery to dissipate heat, which helps to keep the operating temperature of the battery within an appropriate range, improve the performance and life of the battery, and at the same time, it also facilitates the rapid transfer of the battery temperature to the column 13, facilitating the temperature collection of the temperature sensor.

[0048] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A temperature acquisition device for a lithium battery pack, characterized in that: include: A heat-conducting column (1), wherein the heat-conducting column (1) is made of a heat-conducting material, a plurality of battery mounting positions (11) are formed on the peripheral side of the heat-conducting column (1), a plurality of arc-shaped walls (12) corresponding to the plurality of battery mounting positions (11) are formed on the peripheral wall of the heat-conducting column (1), and each of the arc-shaped walls (12) can be fitted with a battery in a corresponding battery mounting position (11) to exchange heat with the corresponding battery; The frame (2) comprises a first frame (21) and a second frame (22), wherein the first frame (21) is in contact with one end of the heat-conducting column (1), and the second frame (22) is in contact with the other end of the heat-conducting column (1), and the first frame (21) and the second frame (22) are detachably connected, and the first frame (21) and the second frame (22) are both made of heat-conducting materials to exchange heat with the heat-conducting column (1); A temperature sensor is provided on the first frame (21) or the second frame (22) to detect the temperature of the corresponding frame.

2. The temperature acquisition device of the lithium battery pack according to claim 1, characterized in that: There are a plurality of heat-conducting columns (1), which are arranged in an array, and each of the heat-conducting columns (1) is in contact with the first frame (21) and the second frame (22).

3. The temperature acquisition device of the lithium battery pack according to claim 2, characterized in that: The first frame (21) includes a first side wall (211), and the second frame (22) includes a second side wall (221); The lithium battery pack temperature collection device comprises a positive electrode sheet (3) and a negative electrode sheet (4); the positive electrode sheet (3) is arranged between one end of the heat-conducting column (1) and the first side wall (211); the positive electrode sheet (3) abuts against the first side wall (211) to exchange heat with the first side wall (211); and the positive electrode sheet (3) is also electrically connected to the positive electrode of each battery; The negative electrode sheet (4) is arranged between the other end of the heat-conducting column (1) and the second side wall (221); the negative electrode sheet (4) abuts against the second side wall (221) to exchange heat with the second side wall (221); and the negative electrode sheet (4) is also electrically connected to the negative electrode of each battery.

4. The temperature acquisition device of a lithium battery pack according to claim 1, characterized in that: The heat-conducting column (1) comprises at least two columns (13) arranged in sequence along its length direction, each of the columns (13) comprises a plurality of arc-shaped portions (131) corresponding one-to-one to the plurality of battery installation positions (11), and cooperates with at least two of the arc-shaped portions (131) corresponding to the same battery installation position (11) to form the arc-shaped wall (12); Any two adjacent columns (13) are detachably connected. In the length direction of the heat-conducting column (1), one of the two columns (13) located at the head and tail ends abuts against the first frame (21), and the other of the two columns (13) located at the head and tail ends abuts against the second frame (22).

5. The temperature acquisition device of the lithium battery pack according to claim 4, characterized in that: The number of the columns (13) is two, and two ends of the two columns (13) that are away from each other are both recessed with grooves (132), and the bottom walls of the two grooves (132) are penetrated by threaded holes (133). The temperature collection device of the lithium battery pack comprises bolts (5), and the bolts (5) are respectively threadedly connected to the two threaded holes (133) to fix the two columns (13) together.

6. The temperature acquisition device of a lithium battery pack as claimed in claim 4, characterized in that: Two arc-shaped arms (134) are arranged on each of the arc-shaped portions (131). The arc-shaped arms (134) extend in a direction away from the corresponding arc-shaped portion (131) and are arranged around the corresponding battery installation position (11). Each of the arc-shaped arms (134) can abut against a battery in the corresponding battery installation position (11).

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