Battery pack cell temperature acquisition device

Abstract

The utility model discloses a battery pack cell temperature acquisition device, comprising a CCS assembly, the CCS assembly is arranged on the top of a plurality of cells, a plurality of temperature detection groups are arranged on the CCS assembly, the temperature detection groups are connected with a pin socket, each temperature detection group comprises two NTC detection units connected in parallel, the two NTC detection units are respectively arranged on two different cells, and the two NTC detection units are connected with the pin socket. The CCS assembly is provided with the voltage sampling points corresponding to the positive electrode and the negative electrode of the battery cell, and the number of pins required by the pin socket is reduced by connecting the NTC detection unit in parallel, so that the CCS assembly can complete line routing on a single surface, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the field of battery packs, and in particular to a battery pack core temperature acquisition device. Background Art

[0002] A battery pack usually consists of a battery case, battery modules, connecting cables, BMS and BDU, and the CCS (Cells Contact System) integrated busbar is part of the BMS system. CCS is mainly composed of signal acquisition components (FPC, PCB, FFC, etc.), plastic structural parts, copper and aluminum bars, etc., which are connected into a whole through hot pressing or riveting processes to achieve high-voltage series and parallel connection of battery cells, as well as battery temperature sampling and battery cell voltage sampling functions, and provide temperature and voltage to the BMS system through FPC / PCB and connector components.

[0003] With the development of industrial and commercial energy storage, the safety of energy storage products has received more and more attention. The temperature of the battery cell is an important indicator for the safety monitoring of energy storage products. There are generally two detection methods for battery cell temperature detection: half sampling and full sampling. Half sampling means that one NTC detects the temperature of two battery cells, and full sampling means that one NTC detects the temperature of one battery cell. The number of battery cells connected in series in a single energy storage battery pack is usually 12 or 13. If the battery cell temperature is fully sampled, the corresponding CCS socket needs to have more pin pins to meet the wiring requirements, and affected by the size of CCS, double-sided FPC is usually required to achieve full sampling wiring layout requirements. The more pin pins and double-sided FPC of the CCS socket increase the cost, which is not conducive to reducing production costs. Utility Model Content

[0004] The purpose of the utility model is to overcome the above-mentioned defects or problems existing in the background technology and provide a battery pack cell temperature acquisition device.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A battery pack cell temperature collection device comprises a CCS component, wherein the CCS component is arranged on the top of a plurality of cells, a plurality of temperature detection groups are arranged on the CCS component, the temperature detection groups are connected to a pin socket, the temperature detection groups comprise two parallel NTC detection units, the two NTC detection units are respectively arranged on two different cells, and the CCS component is provided with voltage sampling points corresponding to the positive electrode of the cell and the negative electrode of the cell.

[0007] In certain embodiments of the present invention, two parallel-connected NTC detection units in each temperature detection group are arranged at intervals.

[0008] In certain embodiments of the present invention, the temperature detection group and the connection line between the temperature detection group and the pin socket are arranged on the same surface of the CCS component.

[0009] In some embodiments of the present invention, adjacent NTC detection units are arranged alternately on both sides of the same surface of the CCS component.

[0010] In some embodiments of the present invention, two parallel-connected NTC detection units use NTC thermistors of the same model.

[0011] In some embodiments of the present invention, the NTC detection unit is arranged between two voltage sampling points, and the two voltage sampling points correspond to the positive electrode and the negative electrode of the same battery cell respectively.

[0012] In certain embodiments of the present invention, the voltage sampling point includes a positive sampling point and a negative sampling point, the positive sampling point corresponds to the positive pole of the battery cell, the negative sampling point corresponds to the negative pole of the battery cell, and the NTC detection unit is arranged on a side close to the negative sampling point.

[0013] In some embodiments of the present invention, connecting pieces extend from both sides of the CCS assembly, and mounting holes are arranged on the connecting pieces.

[0014] From the above description of the utility model, it can be seen that compared with the prior art, the utility model has the following beneficial effects:

[0015] By connecting NTC detection units in parallel, the number of pin pins required for the pin socket of the battery pack when the temperature is fully sampled is reduced, the number of NTC detection units is increased without increasing the wiring from the NTC detection units to the pin socket, and the CCS component can maintain single-sided wiring, which is conducive to reducing production costs, making the technical solution of full temperature sampling of the battery pack more popular, and the energy storage battery pack products safer and more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 It is a schematic diagram of the arrangement of the temperature detection group of the utility model;

[0019] Description of main reference numerals:

[0020] 1. CCS component, 2. pin socket, 3. NTC detection unit, 31. First temperature detection group, 32. Second temperature detection group, 33. Third temperature detection group, 34. Fourth temperature detection group, 35. Fifth temperature detection group, 36. Sixth temperature detection group, 4. Voltage sampling point, 41. Positive sampling point, 42. Negative sampling point, 5. Connecting piece. DETAILED DESCRIPTION

[0021] 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 preferred embodiments of the utility model and should not be regarded as excluding other embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0022] In the claims, specification and the above-mentioned drawings of the utility model, unless otherwise clearly defined, the use of terms such as "first", "second" or "third" etc. is to distinguish different objects rather than to describe a specific order.

[0023] In the claims, specification and the above-mentioned drawings of the utility model, unless otherwise explicitly defined, directional words, such as the terms "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inside", "outside", "up", "down", "front", "back", "left", "right", "clockwise", "counterclockwise", etc., indicating directions or positional relationships are based on the directions and positional relationships shown in the drawings, and are only for the convenience of describing the invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the specific protection scope of the invention.

[0024] In the claims, specification and the above drawings of the utility model, unless otherwise clearly defined, if the term "fixed connection" or "fixed connection" is used, it should be understood in a broad sense, that is, any connection method without a displacement relationship and relative rotation relationship between the two, that is to say, including non-detachable fixed connection, detachable fixed connection, integrated connection and fixed connection through other devices or elements.

[0025] In the claims, specification and drawings of the present utility model, if the terms "include", "have" and their variations are used, they are intended to mean "including but not limited to".

[0026] Example 1, see Figure 1-2 :

[0027] A battery pack cell temperature acquisition device comprises a CCS component 1, wherein the CCS component 1 is installed in a battery module, wherein a plurality of cells are arranged in the battery module. Specifically, the CCS component 1 is arranged on top of the plurality of cells, and a plurality of temperature detection groups are arranged on the CCS component 1, wherein the temperature detection groups are connected to a pin socket 2, and the temperature detection groups comprise two parallel NTC detection units 3, wherein the two NTC detection units 3 are respectively arranged on two different cells, and the number of pin pins required for the pin socket 2 is reduced by connecting the NTC detection units 3 in parallel, so that the CCS component 1 can maintain single-sided line routing, thereby reducing production costs, and full acquisition of the battery pack temperature makes the energy storage battery pack product safer and more reliable.

[0028] As an implementation mode, the temperature detection group and the connecting wires between the temperature detection group and the pin socket 2 are arranged on the same surface of the CCS component 1; it can be understood that only part of the connecting wires are shown in the accompanying drawings, and the connecting wires are arranged on one side surface of the CCS component 1, which makes the wiring simple and helps to reduce production costs.

[0029] As an implementation mode, a plurality of battery cells are arranged in a straight line in the battery module, each NTC detection unit 3 corresponds to a battery cell, and adjacent NTC detection units 3 are staggeredly arranged on both sides of the same surface of the CCS component 1, which is beneficial to ensure the battery cell temperature detection effect.

[0030] As an implementation mode, two parallel NTC detection units 3 in each temperature detection group are arranged at intervals, so that the two temperature detection groups are arranged in a staggered manner, and one battery cell is spaced between the two NTC detection units 3 of the temperature detection group, and any NTC detection unit 3 in another temperature detection group is arranged on the spaced battery cell, and the other NTC detection unit 3 in another temperature detection group is also arranged at intervals. For details, see the attached Figure 2 If 13 battery cells are arranged in the battery module, there are six temperature detection groups in total, and the battery cells are arranged and counted in sequence. The first battery cell and the third battery cell are correspondingly arranged as the first temperature detection group 31, the second battery cell and the fourth battery cell are correspondingly arranged as the second temperature detection group 32, the fifth battery cell and the seventh battery cell are correspondingly arranged as the third temperature detection group 33, the sixth battery cell and the eighth battery cell are correspondingly arranged as the fourth temperature detection group 34, the ninth battery cell and the eleventh battery cell are correspondingly arranged as the fifth temperature detection group 35, and the tenth battery cell and the twelfth battery cell are correspondingly arranged as the sixth temperature detection group 36. It can be understood that the NTC detection unit 3 corresponding to the thirteenth battery cell is directly connected to the pin socket 2.

[0031] The temperature detection group determines the temperature of the corresponding battery cell by calculating the resistance of the parallel NTC thermistor; as an embodiment, the two parallel NTC detection units 3 use the same type of NTC thermistor, such as a conventional 10k / B3435k NTC thermistor. The RT parameter table of the 10k / B3435k NTC thermistor is as follows:

[0032]

[0033]

[0034] The CCS component 1 is provided with voltage sampling points 4 corresponding to the positive pole and the negative pole of the battery cell, so as to facilitate the sampling and detection of the battery cell voltage.

[0035] As an implementation manner, the NTC detection unit 3 is arranged between two voltage sampling points 4, and the two voltage sampling points 4 respectively correspond to the positive electrode and the negative electrode of the same battery cell.

[0036] As an implementation mode, the voltage sampling point 4 includes a positive sampling point 41 and a negative sampling point 42. The voltage sampling point of the CCS component 1 corresponding to the positive electrode of the battery cell is called the positive sampling point 41, and the voltage sampling point of the CCS component 1 corresponding to the negative electrode of the battery cell is called the negative sampling point 42. The NTC detection unit 3 is arranged on the side close to the negative sampling point 42, so that the positive and negative electrodes of multiple battery cells arranged in sequence are staggered, and the NTC detection units 3 corresponding to each battery cell are also staggered on the CCS component 1, so that the NTC detection units 3 are evenly arranged on the CCS component 1, which is conducive to ensuring the effect of battery cell temperature sampling and detection.

[0037] As an implementation mode, connecting pieces 5 are extended on both sides of the CCS assembly 1, and mounting holes are arranged on the connecting pieces 5 to facilitate the installation of the CCS assembly 1 in the battery module.

[0038] The description of the above specification and embodiments is used to explain the protection scope of the utility model, but does not constitute a limitation on the protection scope of the utility model. Through the enlightenment of the utility model or the above embodiments, ordinary technicians in this field can obtain modifications, equivalent replacements or other improvements to the embodiments of the utility model or part of the technical features thereof through logical analysis, reasoning or limited experiments, which should be included in the protection scope of the utility model.

Claims

1. A battery pack core temperature collection device, characterized in that: It includes a CCS component, which is arranged on the top of multiple battery cells. A plurality of temperature detection groups are arranged on the CCS component. The temperature detection groups are connected to pin sockets. The temperature detection groups include two parallel NTC detection units. The two NTC detection units are respectively arranged on two different battery cells. The CCS component is provided with voltage sampling points corresponding to the positive pole of the battery cell and the negative pole of the battery cell.

2. A battery pack core temperature acquisition device according to claim 1, characterized in that: Two parallel NTC detection units are arranged at intervals in each temperature detection group.

3. A battery pack core temperature acquisition device according to claim 1, characterized in that: The temperature detection group and the connection line between the temperature detection group and the pin socket are arranged on the same side of the CCS component.

4. A battery pack core temperature acquisition device according to claim 3, characterized in that: Adjacent NTC detection units are arranged alternately on both sides of the same surface of the CCS component.

5. The battery pack core temperature acquisition device according to claim 1, characterized in that: The two parallel-connected NTC detection units use NTC thermistors of the same type.

6. A battery pack core temperature acquisition device according to claim 1, characterized in that: The NTC detection unit is arranged between two voltage sampling points, and the two voltage sampling points correspond to the positive electrode and the negative electrode of the same battery cell respectively.

7. A battery pack core temperature acquisition device according to claim 6, characterized in that: The voltage sampling points include a positive sampling point and a negative sampling point, the positive sampling point corresponds to the positive pole of the battery cell, the negative sampling point corresponds to the negative pole of the battery cell, and the NTC detection unit is arranged on a side close to the negative sampling point.

8. The battery pack core temperature acquisition device according to claim 1, characterized in that: Connecting plates are extended on both sides of the CCS assembly, and mounting holes are arranged on the connecting plates.

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